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WO2018127182A1 - Procédé d'échange d'informations entre des systèmes, système de communication sans fil et équipement utilisateur - Google Patents

Procédé d'échange d'informations entre des systèmes, système de communication sans fil et équipement utilisateur Download PDF

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Publication number
WO2018127182A1
WO2018127182A1 PCT/CN2018/071787 CN2018071787W WO2018127182A1 WO 2018127182 A1 WO2018127182 A1 WO 2018127182A1 CN 2018071787 W CN2018071787 W CN 2018071787W WO 2018127182 A1 WO2018127182 A1 WO 2018127182A1
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WO
WIPO (PCT)
Prior art keywords
communication system
wireless communication
service
service bearer
user equipment
Prior art date
Application number
PCT/CN2018/071787
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English (en)
Chinese (zh)
Inventor
韩立锋
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201710015171.5A external-priority patent/CN108282320B/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to BR112019013909A priority Critical patent/BR112019013909A2/pt
Priority to KR1020197022628A priority patent/KR102232596B1/ko
Priority to EP18735876.7A priority patent/EP3567976B1/fr
Priority to JP2019536961A priority patent/JP6974476B2/ja
Publication of WO2018127182A1 publication Critical patent/WO2018127182A1/fr
Priority to US16/502,756 priority patent/US20190327658A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/22—Manipulation of transport tunnels

Definitions

  • the embodiments of the present invention relate to the field of wireless communications, and in particular, to an inter-system information interaction method, a wireless communication system, and a user equipment.
  • a link from a core network device to a wireless access device (eg, a wireless access device) to a user equipment (UE) direction is a downlink, from the user equipment to the
  • the link of the wireless access device to the direction of the core network device is an uplink.
  • the core network device In current wireless communication systems, such as long term evolution (LTE) systems, on the downlink or on the uplink, the core network device, the wireless access device, and The user equipment establishes a service bearer of the non-access stratum between the non-access (NAS) layer and establishes a service bearer of the access stratum in the access (AS) layer to transmit the user equipment.
  • LTE long term evolution
  • the user equipment moves between wireless communication systems of different communication systems, it is required to transmit a service data stream in the wireless communication system to which the mobile device is moved, for example, the service data flow of the user equipment from the fifth generation wireless communication
  • the system switches to a wireless communication system of other communication systems (e.g., LTE), or the user equipment switches from the wireless communication system of other communication systems to the fifth generation wireless communication system.
  • the service data flow of the non-access stratum established by the radio communication system of the different communication system is different, which may result in the continuity of the service data flow of the user equipment in the service transfer process.
  • the experience of the user equipment is reduced. .
  • the embodiment of the present invention provides an inter-system information interaction method, a wireless communication system, and a user equipment, which avoids a decrease in the service data flow of the user equipment due to the movement of the user equipment between different communication system wireless communication systems. problem.
  • a first aspect of the embodiments of the present invention provides a method for information interaction, including the following content.
  • the first wireless communication system determines to transfer the traffic data stream of the user equipment to the second wireless communication system, the first wireless communication system and the second wireless communication system using different communication systems,
  • the service bearer group is a service bearer corresponding to the non-access stratum of the second radio communication system, and the one service bearer group includes at least two service bearers in the non-access stratum of the first radio communication system.
  • the service data flow of the user equipment from the first wireless communication system serving the user equipment is corresponding to the service bearer in the non-access stratum of the first wireless communication system. Transmitting a service bearer in a non-access stratum of the second radio communication system, and transmitting information of the service bearer in the non-access stratum of the second radio communication system to the second radio communication system, thereby avoiding
  • the wireless communication system randomly allocates service bearers, which causes a problem of discontinuity of the service data stream, thereby improving the experience of the user equipment.
  • the core network device in the first wireless communication system receives second information sent by the wireless access device in the first wireless communication system, and the second information identifies the service data stream in the first wireless At least one service bearer group in the non-access stratum of the communication system, each of the at least one service bearer group corresponding to one service bearer in the access layer of the first radio communication system, where the at least one service bearer group includes The one service bearer group.
  • the wireless access device in the first wireless communication system notifies at least one service bearer group of the service data flow to the core network device in the first wireless communication system to determine the first information.
  • the core network device in the first wireless communications system determines the service data flow according to the second information
  • the one service bearer group in the non-access stratum of the first radio communication system is in the one service bearer corresponding to the non-access stratum of the second radio communication system.
  • the core network device determines, according to the second information, a correspondence between a service bearer group in the non-access stratum of the first radio communication system and a service bearer in the non-access stratum in the second radio communication system. .
  • the core network device in the first wireless communication system determines, according to the second information, that the service data flow is
  • the one service bearer corresponding to the one of the service bearer groups in the non-access stratum of the first radio communication system in the non-access stratum of the second radio communication system includes:
  • the core network device in the first wireless communication system according to the second information, the service flow template, and the service flow template priority to the one service bearer group in the non-access stratum of the first wireless communication system
  • Each of the service bearers is merged to generate the one service bearer corresponding to the non-access stratum of the second wireless communication system.
  • the determining of the first information may also be based on a service flow template and a service flow template priority.
  • the method further includes:
  • the core network device of the first wireless communication system notifies the wireless access device of the first wireless communication system that the service data flow corresponds to the one service bearer in the non-access stratum of the second wireless communication system .
  • the wireless access device of the first wireless communication system is notified.
  • the method further includes:
  • the core network device of the first wireless communication system notifies the user equipment that the service data flow is corresponding to the one service bearer in the non-access stratum of the second wireless communication system;
  • the core network device of the first wireless communication system notifies the user equipment that the service data stream is a service bearer in an access layer of the second wireless communication system.
  • the user equipment is notified of the correspondence between the correspondence between the non-access stratum and the access layer, so that the user equipment transfers the service to the second wireless communication system.
  • a second aspect of the embodiments of the present invention provides a method for inter-system information interaction, including the following content.
  • the second wireless communication system determines that the service data flow of the user equipment is transferred from the first wireless communication system to the second wireless communication system, the first wireless communication system and the second wireless communication system using different communication systems ,
  • the second wireless communication system notifies the first wireless communication system of the one service bearer.
  • the second wireless communication system determines, by the second wireless communication system, a service bearer of a non-access stratum in the first wireless communication system to a service bearer in the second wireless communication system, and And notifying the information of the corresponding service bearer of the service data flow of the user equipment of the first wireless communication system in the second wireless communication system. Therefore, the continuity of the service of the user equipment can be ensured when the service data stream of the user equipment is transmitted by the second wireless communication system, thereby providing a user experience of the user equipment.
  • the method further includes:
  • the core network device of the second wireless communication system receives third information from the first wireless communication system, the third information indicating that the service data stream is in a non-access layer of the first wireless communication system
  • At least one service bearer group and at least one of a service flow template and a service flow template priority, wherein each of the at least one service bearer group corresponds to a service bearer in an access layer of the first wireless communication system,
  • the at least one service bearer group includes the one service bearer group;
  • the core network device of the second wireless communication system determines, according to the third information, that the service data flow is in the second wireless communication of the one service bearer group in the non-access stratum of the first wireless communication system The corresponding one of the service bearers in the non-access stratum of the system.
  • the core network device of the second wireless communication system notifies the wireless access device of the first wireless communication system that the service data stream is in a non-access layer of the second wireless communication system. Describe a service bearer
  • the second wireless communication system determines the service bearer correspondence of the non-access stratum according to the third information, and notifies the wireless access device of the first wireless communication system.
  • the method further includes:
  • the core network device of the second wireless communication system notifies the user equipment that the service data flow is corresponding to the one service bearer in the non-access stratum of the second wireless communication system;
  • the core network device of the second wireless communication system notifies the user equipment that the service data flow is a service bearer in an access layer of the second wireless communication system.
  • the user equipment is notified of the service bearer correspondence relationship of the non-access stratum and the service bearer correspondence relationship of the access stratum, so that the user equipment performs service transfer.
  • a third aspect of the embodiments of the present invention provides a service processing method, including the following content.
  • the first wireless communication system receives fourth information from the second wireless communication system, the fourth information indicating a service bearer of the service data flow in a non-access stratum of the second wireless communication system ;
  • the first wireless communication system determines, according to the fourth information, that the one service bearer is in a service bearer group corresponding to a non-access stratum of the first radio communication system, where the one service bearer group includes the At least two traffic bearers in the non-access stratum of the first wireless communication.
  • the second wireless communication system sends the related information required for the service bearer correspondence relationship to the first wireless communication system to generate a non-accessed service bearer correspondence relationship, thereby avoiding the service transfer to
  • the first wireless communication system randomly allocates service discontinuities caused by service bearers, thereby providing a user experience of the user equipment.
  • the first wireless communications system determines, according to the fourth information, that the one service bearer is not in the first wireless communications system.
  • Multiple service bearers in the layer including:
  • the core network device of the first wireless communication system splits the one service bearer according to the fourth information, and the service flow template and the service flow template priority, and determines that the service bearer is in the first The one service bearer group in the non-access stratum of the wireless communication system.
  • the first wireless communication system determines, according to the fourth information, a correspondence of service bearers of the non-access stratum.
  • the method further includes:
  • the core network device of the first wireless communication system notifies the wireless access device of the second wireless communication system that the service data stream is in a service bearer group corresponding to a non-access stratum of the first wireless communication system.
  • the core network device of the first wireless communication system notifies the wireless bearer of the second wireless communication system of the corresponding relationship of the service bearer of the non-access layer, so that the wireless of the second wireless communication system
  • the access device transfers the traffic of the user equipment to the first wireless communication system.
  • the core network device of the first wireless communication system notifies the user equipment that the service data flow is in the non-access stratum corresponding to the one service bearer in the first wireless communication system by using the second wireless communication system group.
  • the core network device of the first wireless communication system notifies the user equipment non-access stratum of the service bearer correspondence, so that the user equipment performs service transfer.
  • the wireless access device of the first wireless communication system corresponds the one service bearer group to one service bearer of the access layer of the first wireless communication system.
  • the wireless access device of the first wireless communication system performs bearer mapping from the non-access stratum to the access stratum.
  • the wireless access device of the first wireless communication system notifies the user equipment that the service data stream is in a service bearer of the first wireless communication system access layer and the first The correspondence between the one service bearer group in the non-access stratum of the wireless communication system.
  • the user equipment is notified of the bearer mapping relationship between the non-access stratum and the access layer, so that the user equipment can accurately transfer the service data flow to the corresponding access layer service bearer and the non-access stratum service bearer. on.
  • a fourth aspect of embodiments of the present invention provides a first wireless communication system, a second wireless communication system, and a user equipment for performing various aspects and possible implementations thereof.
  • the first wireless communication system includes at least a first device and a second device for performing the method actions of the first wireless communication system.
  • the second wireless communication system includes method actions of the first device and the second device for performing the second wireless communication system in various aspects and possible implementations thereof.
  • the user equipment includes a receiving unit and a processing unit, and the receiving unit is configured to perform a receiving action of the user equipment in the foregoing method, where the processing unit is configured to perform a transfer, a determination, and the like in the foregoing method.
  • a fifth aspect of the embodiments of the present invention provides a communication processing method, including the following content.
  • a user plane core network device in the first wireless communication system establishes a tunnel with the wireless access device in the first wireless communication system according to a protocol data unit session PDU Session granularity; a user plane core network of the first wireless communication system The device establishes a tunnel with the second communication system according to the service bearer granularity; the user plane core network device of the first wireless communication system maps data from the tunnel established according to the PDU Session granularity to the service bearer according to the service The granularity is established in the tunnel.
  • an embodiment of the present invention further provides a communication processing apparatus, including: a processor and a memory, wherein the memory stores an instruction code, and when the instruction code is called by the processor, implements a fifth Aspects of the methods provided.
  • the embodiment of the present invention further provides a communication system, including: a user plane core network device and a wireless access device; wherein the user plane core network device is configured to use a protocol data unit session PDU Session granularity.
  • a protocol data unit session PDU Session granularity Establishing a tunnel with the wireless access device, and establishing a tunnel with the other communication system according to the service bearer granularity; the wireless access device is configured to use the tunnel established according to the PDU Session granularity
  • the user plane core network device sends data; the user plane core network device is further configured to map the data into a tunnel established according to the service bearer granularity.
  • a sixth aspect of the embodiments of the present invention provides a computer storage medium, wherein the computer storage medium stores an instruction code, and the instruction code is used to implement the method provided by any of the foregoing aspects or various possible implementation manners.
  • a seventh aspect of the embodiments of the present invention provides a chip system including a memory and a processor, where the memory stores an instruction code, and the instruction code is invoked by the processor to implement any of the foregoing aspects or various possible implementation manners. The method provided.
  • FIG. 1 is a schematic structural diagram of a system of a wireless communication system according to an embodiment of the present invention
  • FIG. 1B is a schematic diagram of a protocol architecture of a wireless communication system according to an embodiment of the present invention.
  • 2A is a schematic diagram of a process of information exchange between systems according to an embodiment of the present invention.
  • FIG. 2B is a schematic diagram of a process of information exchange between systems according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a process of information exchange between systems according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of information exchange between systems according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of information exchange between systems according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of information exchange between systems according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of information exchange between systems according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of information exchange between systems according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of information exchange between systems according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of information exchange between systems according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of information exchange between systems according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a first wireless communication system according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of a second wireless communication system according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of a wireless access device according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of a core network device according to an embodiment of the present disclosure.
  • FIG. 15 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram of a system of a wireless communication system according to an embodiment of the present invention.
  • the wireless communication system includes a core network, an access network, and a user equipment (also referred to as a terminal).
  • the core network includes a user plane core network device and a control plane core network device.
  • the access network mainly includes a wireless access device, such as a base station or a wireless local area network access point, and other transmission reception point (TRP), and provides the user equipment with an access service under the licensed spectrum or an unlicensed spectrum. Access service.
  • the user equipment accesses the wireless communication system through the access network and the core network, and then connects through the core network and a public data network (PDN) server connected to the core network. Go to the Internet to access various business services, such as multimedia audio and video, movie downloads, and more.
  • PDN public data network
  • wireless communication systems of different communication systems are connected through a core network.
  • the user equipment and the wireless access equipment serving the user equipment transmit various data on the uplink and downlink according to a protocol layer specified by the 3rd generation partnership project (3GPP), for example Control signaling or service data, wherein most of the control signaling is mainly transmitted on the control channel of each protocol layer, and most of the service data is mainly transmitted on the traffic channel of each protocol layer.
  • 3GPP 3rd generation partnership project
  • the access network accesses the user equipment to the wireless communication system through a part of the protocol layers of the protocol layers.
  • the part of the protocol layer is collectively referred to as an access (AS) layer.
  • AS access
  • the so-called access layer is a protocol layer for accessing the user equipment to the air interface between the user equipment and the access network in the wireless communication system. While some types of signaling data or service data are transmitted to the access network, the access network does not process, and the access network only forwards the signaling data or service data. Since the data does not involve the access network accessing the user equipment to the wireless communication system, the protocol layer carrying the data is a non-access (NAS) layer.
  • NAS non-access
  • the protocol layer of the LTE wireless communication system includes a physical (PHY) layer, a media access control (MAC) layer, a radio link control (RLC) layer, and a packet data convergence protocol (Packet Data Convergence Protocol). , PDCP) layer and radio resource control (RRC) layer.
  • PHY physical
  • MAC media access control
  • RLC radio link control
  • RRC radio resource control
  • the wireless communication system may configure a service bearer to transmit a service data stream of the user equipment.
  • a service bearer includes a transmission resource of a path between the access network and the user equipment, and a transmission resource of a path between the access network and the core network.
  • the service data flow is carried on the service bearer of the access layer, and the service data flow in the non-access stratum is carried on the service bearer of the non-access stratum.
  • the service bearer of the non-access stratum may be transparent to the radio access device in the wireless communication system, that is, the radio access device knows that there is service data stream transmission, but does not know the content of the service data stream transmission.
  • the service data flow refers to a data flow of various application services provided by a communication network, such as a data flow of a certain video service.
  • QoS quality of service
  • the wireless communication system is a path between the user equipment and the access network, specifically each protocol layer (such as a PDCP layer, an RLC layer, a MAC layer, and a physical layer) on the path.
  • the transmission resources are configured, and the sum of these transmission resources is called a radio bearer (RB).
  • RB radio bearer
  • the path between the user equipment and the access network is called a radio bearer, and provides a service quality of service data transmitted on the path between the user equipment and the access network.
  • the path between the access network and the core network provides a service quality for transmitting the service data between the access network and the core network by establishing a bearer with a dedicated tunnel.
  • a set of quality of service parameters may include at least one of the following parameters: a QoS Classification Identifier (QCI), a Guaranteed Bit Rate (GBR), a Maximum Bit Rate (MBR), and Aggregate Maximum Bit Rate (AMBR), etc.
  • QCI indicates one or more of indicators such as delay, packet loss rate, and priority.
  • the service data flow of the user equipment is transferred from a wireless communication system of one communication system to another wireless communication system of a communication system, for example, switching from a fifth generation wireless communication system to an LTE system, or from an LTE system Switching to the fifth-generation wireless communication system, since the wireless communication system of the two communication systems may not carry the same service data flow to the user equipment, the transmission of the data packet may be discontinuous during the handover process.
  • a service flow which is also called a QoS flow
  • multiple service flows are mapped to one service bearer of the access stratum.
  • the non-access stratum carries service data flows of different quality of service requirements in service flows that provide different quality of service in the non-access stratum, and these service flows that provide different quality of service are mapped to the user equipment in the access stratum.
  • At least one service bearer of the access layer to the entire path between the core networks. It is assumed that the user equipment in the fifth generation wireless communication system filters a service data flow through a service flow template to obtain a plurality of service flows carrying the service data flow, and a service formed by the multiple service flows.
  • a stream group which can be called a service bearer group of the NAS layer.
  • the user equipment is composed of two service data flows
  • the non-access stratum carries the service data flow 1 in the service flow 1 (the service flow 1 can be in the service flow group 1)
  • the service data flow 2 is carried on the service flow 2 (the service flow) 2
  • the access layer further carries the service flow 1 in the service bearer 1 of the access layer
  • the service flow 2 is carried in the service bearer 2 of the access layer.
  • the wireless communication system to which the user equipment is handed over may carry the service data stream 1 in the service bearer 2 of the access layer, thereby causing the service data stream to be in the source system before the handover and
  • the mapping between the non-access stratum and the access stratum in the target system in which the handover is performed is different, thereby causing the continuity of the user equipment to decrease.
  • the NAS layer service bearer corresponds to the evolved packet system bearer (EPS bearer), and the service bearer of the AS layer corresponding to the NAS layer service bearer includes the air bearer (radio bearer, RB).
  • EPS bearer evolved packet system bearer
  • RB radio bearer
  • a ground-side tunnel the ground-side tunnel is established according to the service bearer, and includes an S1 bearer and an S5 bearer, respectively located between the radio access device and the SGW (serving gateway), and the SGW and the PGW (PDN gate way, Between the PDN gateways, refer to the provisions of the 3GPP protocol.
  • one service bearer of the NAS layer corresponds to one service flow
  • one service of the AS layer carries the radio bearer RB corresponding to the air interface and the tunnel on the ground side
  • the tunnel is a protocol data unit session (PDU session).
  • the established service flows that belong to the same PDU session use the same tunnel.
  • the PDU session is a link between a user equipment and a data network (eg, the Internet) that provides service content to provide a protocol data unit link service.
  • Each PDU session has a unique identifier.
  • the unique identifier of the PDU session may be one of the following: a PDU session identifier, an access point name (APN), an identifier of the user plane core network device, and a user plane core network.
  • the address of the device for example, the IP address
  • the IP address the IP address assigned by the user-side core network device to the user device.
  • the radio bearer of the air interface is used to carry service data
  • the radio bearer is also called a data radio bearer (DRB).
  • DRB data radio bearer
  • An embodiment of the present invention provides a method for inter-system information interaction, as shown in Figure 2-A.
  • the first wireless communication system and the second wireless communication system are different.
  • the user equipment is served by the first wireless communication system in signal coverage of the first wireless communication system and the second wireless communication system.
  • the first wireless communication system determines to transfer the service data stream of the user equipment to the second wireless communication system, the first wireless communication system and the second wireless communication system using different communication systems.
  • the user equipment measures a signal sent by the second wireless communication system to generate a measurement report.
  • the measurement report includes a measurement result of signal strength and signal quality of a signal transmitted by the second wireless communication system.
  • the first wireless communication system may determine, according to the measurement report, that the second wireless communication system meets a condition of service transfer, for example, the signal strength or the signal quality in the measurement report is greater than a certain threshold, and the first wireless communication system determines The service data flow of the user equipment can be transferred to the second wireless communication system.
  • the first wireless communication system sends first information to the second wireless communication system, where the first information indicates that the service data flow of the user equipment is in a non-access layer of the first wireless communication system.
  • One service bearer group corresponding to one service bearer in the non-access stratum of the second radio communication system, where the one service bearer group includes at least two of the non-access stratums of the first radio communication system Business bearer.
  • the first wireless communication system determines a correspondence between a service bearer group of a non-access stratum in the first radio communication system and a service bearer in a non-access stratum of the second radio communication system. And notifying, by the first information, that the service bearer group in the non-access stratum of the first radio communication system is in a non-access stratum corresponding to the second radio communication system, and the service bearer.
  • one service bearer of the non-access stratum in the first wireless communication system is a service flow, and multiple service flows are one service bearer group and one service bearer group.
  • a service bearer of the access layer of the first wireless communication system is an LTE system
  • one service bearer of the non-access stratum of the second radio communication system is an EPS bearer
  • a non-access stratum service bearer corresponds to the second radio.
  • the first radio receives the second information sent by the wireless access device in the first wireless communication system, and the second information identifies the non-connection of the service data stream in the first wireless communication system Entering at least one service bearer group in the layer, and determining, according to the second information, the service flow template (optional) and the service flow template priority (optional), the service data flow in the first wireless communication system
  • the one service bearer group in the non-access stratum is in the one service bearer corresponding to the non-access stratum of the second radio communication system.
  • the second wireless communication system core network device receives the first information, and determines whether to accept the corresponding relationship determined by the first wireless communication system. If accepted, the second wireless communication system core network device sends an admission notification indicating that the service data flow is received by the corresponding one of the service bearers in the non-access stratum of the second wireless communication system.
  • the first wireless communication system core network device notifies the user equipment that the service data flow is in a non-access stratum of the second wireless communication system in the non-access stratum of the first wireless communication system. Corresponding one of the service bearers, so that the user equipment performs service transfer of the non-access stratum.
  • the first wireless communication system core network may further notify the user equipment that the service data flow is in a service bearer corresponding to the access layer of the second wireless communication system, so that the user equipment performs the connection. Incoming business transfer.
  • the source system (the first wireless communication system) of the service transfer determines the correspondence between the service bearers of the non-access stratum, so as to prevent the user equipment from flowing the service data in the second radio.
  • An embodiment of the present invention provides a method for inter-system information interaction, as shown in Figure 2-B.
  • the first wireless communication system and the second wireless communication system are different.
  • the user equipment is served by the first wireless communication system in signal coverage of the first wireless communication system and the second wireless communication system.
  • the first wireless communication system may be a 5th generation wireless communication system
  • the second wireless communication system may be an LTE system.
  • the second wireless communication system determines that the service data flow of the user equipment is transferred from the first wireless communication system to the second wireless communication system.
  • the user equipment measures a signal sent by the second wireless communication system to generate a measurement report.
  • the measurement report includes a measurement result of signal strength and signal quality of a signal transmitted by the second wireless communication system.
  • the first wireless communication system may determine, according to the measurement report, that the second wireless communication system meets a condition of service transfer, for example, the signal strength or the signal quality in the measurement report is greater than a certain threshold, and the first wireless communication system determines The service data flow of the user equipment can be transferred to the second wireless communication system. Transmitting, by the first wireless communication system, a service transfer request to the second wireless communication system, so that the second wireless communication system determines that a service data flow of the user equipment is transferred from the first wireless communication system to the second wireless In the communication system.
  • the second wireless communication system determines that one service bearer group of the service data flow in a non-access stratum of the first radio communication system is in a non-access stratum of the second radio communication system.
  • the one service bearer group includes at least two service bearers in the non-access stratum of the first wireless communication system.
  • the second wireless communication system determines a non-access stratum service bearer group of the first radio communication system to a service bearer corresponding to the non-access stratum in the second radio communication system.
  • the core network device of the second wireless communication system receives third information from the first wireless communication system, the third information indicating non-access of the service data flow in the first wireless communication system At least one service bearer group of the layer, and at least one of a service flow template and a service flow template priority, wherein each of the at least one service bearer group corresponds to a service in the access layer of the first wireless communication system
  • the bearer, the at least one service bearer group includes the one service bearer group; and the core network device of the second wireless communication system determines, according to the third information, that the service data stream is not in the first wireless communication system
  • the one service bearer group of the access layer is corresponding to the one service bearer in the non-access stratum of the second radio communication system.
  • the second wireless communication system notifies the first wireless communication system of the one service bearer.
  • the core network device of the second wireless communication system notifies the wireless access device of the first wireless communication system that the service data stream is corresponding to the non-access stratum of the second wireless communication system A business bearer.
  • the core network device of the second wireless communication system notifies the user equipment that the service data flow corresponds to the one service bearer in the non-access stratum of the second wireless communication system;
  • a core network device of the wireless communication system notifies the user equipment that the service data flow is a traffic bearer in an access layer of the second wireless communication system.
  • the target system (second wireless communication system) of the service transfer determines the correspondence between the service bearers of the non-access stratum, so as to prevent the user equipment from flowing the service data in the second wireless
  • An embodiment of the present invention provides an inter-system information interaction method, and a flowchart of an inter-system information interaction method as shown in FIG. 2-C.
  • the first wireless communication system and the second wireless communication system are different.
  • the user equipment provides service by the second wireless communication system in signal coverage of the first wireless communication system and the second wireless communication system.
  • the first wireless communication system may be a 5th generation wireless communication system
  • the second wireless communication system may be an LTE system.
  • the first wireless communication system determines that the service data flow of the user equipment is transferred from the second wireless communication system to the first wireless communication system.
  • the user equipment measures a signal sent by the first wireless communication system to generate a measurement report.
  • the measurement report includes a measurement result of signal strength and signal quality of a signal transmitted by the first wireless communication system.
  • the second wireless communication system may determine, according to the measurement report, that the first wireless communication system meets a condition of service transfer, for example, if the signal strength or signal quality in the measurement report is greater than a certain threshold, the second wireless communication system determines The service data flow of the user equipment can be transferred to the first wireless communication system. Transmitting, by the second wireless communication system, a service transfer request to the first wireless communication system, such that the first wireless communication system determines that a service data flow of the user equipment is transferred from the second wireless communication system to the first wireless communication In the system.
  • the first wireless communication system receives fourth information from the second wireless communication system, where the fourth information indicates one of the non-access layers of the second wireless communication system.
  • Business bearer
  • the first wireless communication system determines, according to the fourth information, that the one service bearer is in a service bearer group corresponding to a non-access stratum of the first radio communication system, where the one service bearer group includes At least two traffic bearers in the non-access stratum of the first wireless communication.
  • the core network device of the first wireless communication system splits the one service bearer according to the fourth information, and the service flow template and the service flow template priority, and determines that the service bearer is in the The one service bearer group in the non-access stratum of the first wireless communication system.
  • the core network device of the first wireless communication system notifies the wireless access device of the second wireless communication system that the service data flow is in a corresponding one of the non-access layers of the first wireless communication system.
  • Service bearer group
  • the core network device of the first wireless communication system notifies, by the second wireless communication system, that the user equipment is in a non-access layer of the first wireless communication system Describe a service bearer group.
  • the wireless access device of the first wireless communication system associates the one service bearer group with one service bearer of the access layer of the first wireless communication system.
  • the wireless access device of the first wireless communication system notifies, by the second wireless communication system, the service data flow of the user equipment in the access layer of the first wireless communication system Corresponding relationship of the one service bearer group in the non-access stratum of the first radio communication system.
  • the first wireless communication system is used as the target system of the service transfer to determine the correspondence between the service bearers of the access layer, and avoids the service continuity that may be caused when the service is transferred to the first wireless communication system.
  • the problem of interruption is used as the target system of the service transfer to determine the correspondence between the service bearers of the access layer, and avoids the service continuity that may be caused when the service is transferred to the first wireless communication system. The problem of interruption.
  • a service data flow of the user equipment is used as an example.
  • the user equipment may have multiple service data flows, and each service data flow is in the NAS layer of the first wireless communication system.
  • a service bearer group is located corresponding to a service bearer of the NAS layer in the second wireless communication system, or a service bearer of the NAS layer in the second wireless communication system corresponds to a service bearer of the NAS layer of the first wireless communication system The way the group is is similar.
  • An embodiment of the present invention provides an inter-system information interaction method, as shown in the schematic diagram of the inter-system information interaction method shown in FIG.
  • the embodiments of the present invention are further refinement of the foregoing embodiments, and the same or similar contents may not be described again.
  • the user equipment measures a signal strength of the wireless signal sent by the second wireless communication system and a received signal quality, and notifies the first wireless communication system in the form of a measurement report.
  • the user equipment performs measurement of signal strength and signal reception quality on the wireless signal sent by the second wireless access device in the second wireless communication system, and provides a first wireless connection to the first wireless communication system.
  • the incoming device sends a measurement report.
  • the signal strength is reference signal received power (RSRP)
  • the signal receiving quality is reference signal received quality (RSRQ).
  • the sending time of the measurement report may be configured by the first wireless access device serving the user equipment in the first wireless communication system, and may be periodic or non-periodic.
  • the first wireless communications system determines, according to the measurement report, that the service of the user equipment is transferred (in the embodiment, by using a handover as an example) to the second wireless communications system.
  • the conditions of the transfer may be referred to the provisions of the 3GPP protocol.
  • any one of the signal strength of the wireless signal of the second wireless access device and the wireless signal receiving quality of the wireless signal indicated in the measurement report is greater than or equal to a certain threshold, then The first wireless access device determines that the service of the user equipment can be switched to the second wireless communication system.
  • the first wireless communication system sends a handover request to the second wireless communication system, where the handover request is used to switch a service data flow of the user equipment from the first wireless communication system to the first Two wireless communication systems.
  • the first wireless communication system notifies the second wireless communication system of the correspondence between the non-access stratum service bearer group in the implementation to a service bearer or the second wireless communication system determines the corresponding relationship.
  • the information notified in 303 may be sent to the second wireless communication system in the same message as the handover request in 302, or may be performed after the transmission of the handover request.
  • the related information in 303 may be a quality of service rule for the service bearer provided by the first wireless communication system for the service data flow of the user equipment, for example, an identifier of a service bearer including a service data flow of the user equipment.
  • the first wireless communication system directly sends the service quality rule of the service data flow of the user equipment in the first wireless communication system to the second wireless communication system, so as to The second wireless communication system configures the service data flow of the user equipment in the first wireless communication system, and the service of the non-access layer carries the service bearer corresponding to the non-access layer in the second wireless communication system.
  • the service bearer of the non-access stratum of the first radio communication system is a service bearer group composed of at least two services of the non-access stratum, and the service corresponding to the non-access stratum of the second radio communication system
  • the bearer is a service;
  • the service bearer of the non-access stratum in the first radio communication system is one, and the service bearer corresponding to the non-access stratum in the second radio communication system is a service bearer composed of at least two services.
  • the service bearer of the non-access stratum of the first wireless communication system may be a service flow group of the fifth-generation wireless communication system where the service data stream is located,
  • the service bearer of the non-access stratum in the LTE system is an EPS bearer in the LTE system.
  • the 303 is sent in a corresponding relationship, that is, the service data stream of the user equipment is in a non-access stratum of the second radio communication system.
  • Business bearer In this case, the first wireless communication system configures the service data flow of the user equipment to correspond to one of the non-access layers of the second wireless communication system in a service bearer group of the non-access stratum of the first radio communication system.
  • the service bears and notifies the second wireless communication system.
  • the second wireless communication system can determine whether to accept the configuration of the first wireless communication system. If accepted, the second wireless communication system performs service switching in accordance with the configuration of the first wireless communication system.
  • the second wireless communication system notifies the first wireless communication system that the configuration of the first wireless communication system is not accepted, and, optionally, the second wireless communication system can adjust the first The configuration of the wireless communication system notifies the first wireless communication system of the adjusted result. If the service of the user equipment configured by the first wireless communication system has multiple service bearer groups in the non-access stratum of the second wireless communication system, the second wireless communication system may notify the first wireless a communication system, which of the plurality of service bearer groups configured by the first wireless communication system are accepted and which are not accepted.
  • the first information or the third information further includes a PDU session identifier that further includes the service data flow of the user equipment.
  • the service data flow of the user equipment may include multiple service packets.
  • the service packets with the same or similar quality of service requirements in the multiple service packets are carried on the non-access layer service bearers that provide the same quality of service. If the service data flows are provided with at least two non-access layer service bearers, the service bearers form a service bearer group.
  • the service packets with different quality of service requirements in the multiple service packets are carried on the non-access layer service bearers of different quality of service.
  • the second wireless communication system sends a handover response to the first wireless communication system.
  • the first wireless communication system sends a handover command to the user equipment, where the handover command instructs the user equipment to perform Switching from the first wireless communication system to the second wireless communication system.
  • the second wireless communication system notifies the first wireless communication system that the service data flow of the user equipment configured by the first wireless communication system is allowed or not allowed in a service bearer of the second wireless communication system, or
  • the service data flow of the user equipment configured by the second wireless communication system according to the first information is carried in a service corresponding to a non-access stratum in the second wireless communication system.
  • the sending of the second information in the 306 is an optional action, and the switching response in the 304 may be included in the same message and sent to the first wireless communication system, or may be in the This is done after the handover response is sent.
  • the user equipment switches to the second wireless communication system according to the handover command.
  • the first wireless communication system acquires, by the second wireless communication system, the service data flow of the user equipment in the non-access layer of the second wireless communication system. Notifying the second wireless communication system that the information carried by the service can prevent the second wireless communication system from randomly distributing the service bearer, thereby reducing the continuity of the user equipment service, thereby improving the experience of the user equipment. .
  • FIG. 4 is a schematic diagram of a system architecture of an inter-system information interaction method according to an embodiment of the present invention.
  • the system architecture includes a 5th generation wireless communication system and an LTE wireless communication system.
  • the 5th generation wireless communication system includes a 5th generation access network and a 5th generation core network.
  • the 5th generation access network includes at least one 5th generation wireless access device.
  • the 5th generation core network includes at least one 5th generation core network device, such as a 5th generation control plane core network device and a 5th generation user plane core network device.
  • the LTE wireless communication system includes an LTE access network and an LTE core network.
  • the radio access device in the LTE access network is an evolved node B (eNB), and the evolved node B is also called an evolved radio access device.
  • the control plane core network device in the LTE core network includes a serving gateway (S-GW) and a mobile management entity (MME), and the user plane core network device in the LTE core network includes a packet data gateway ( Packet data gateway, P-GW).
  • S-GW serving gateway
  • MME mobile management entity
  • P-GW packet data gateway
  • an inter-system information interaction method provided by this embodiment, as shown in FIG. 5, is an interaction diagram of the inter-system information interaction method, and includes the following content.
  • This embodiment is a further supplement and refinement of the method embodiment shown in FIG. 3, and the duplicate content may not be described again.
  • the first wireless communication system is a fifth generation communication system
  • the first wireless communication system is a 5th generation wireless communication system
  • the second wireless communication system is an LTE system
  • the second The wireless communication system is an LTE wireless communication system.
  • the present embodiment mainly relates to handover of a service of the user equipment from a 5th generation wireless communication system to the LTE wireless communication system.
  • the user equipment sends a message 1 carrying the measurement report to the fifth generation wireless access device.
  • the measurement report includes measurements of signal strength and received signal quality of signals transmitted by the eNB, such as RSRP and RSRQ.
  • the fifth generation wireless access device determines to switch the user equipment to the LTE system where the eNB is located according to the measurement report reported by the user equipment.
  • the fifth generation wireless access device may determine whether the signal strength or the signal reception quality in the measurement report satisfies a handover condition.
  • the handover condition can be specifically referred to the definition of the 3GPP protocol.
  • the fifth generation radio access device determines that at least one of the RSRP and the RSRQ exceeds a certain threshold, and determines to switch the user equipment to the LTE system where the eNB is located.
  • the fifth generation wireless access device sends a message 2 carrying a handover request to a fifth generation control plane core network device, where the message 2 carries the fifth generation wireless communication system as the user equipment.
  • the service quality identifier corresponding to the quality of service parameter of each service flow of the NAS layer provided by the service.
  • the quality of service of the service of the user equipment is divided according to a QoS flow.
  • a quality of service is represented by a quality of service parameter that determines the quality of the service.
  • Different service flows may offer different quality of service.
  • the quality of service identifier of the service flow in the NAS layer may be replaced or mapped by the flow identifier of the service stream of the NAS layer.
  • a service data flow of the user equipment may be carried on multiple service flows to provide different quality of service for different data packets of the service data flow, and the multiple service flows constitute a service bearer group of the NAS layer, or a service. Stream group.
  • the fifth generation wireless communication system maps one service flow group formed by at least one service flow to the same service bearer of the access layer under the fifth generation wireless communication system. Different sets of service flows are mapped to different service bearers of the access layer. Different service flows can be distinguished using flow identification.
  • the NAS layer of the fifth generation wireless communication system includes a service flow 1 providing quality of service 1, a service flow 2 providing quality of service 2, a service flow 3 providing quality of service 3, and a service flow 4 providing quality of service 4, wherein The service flow 1 and the service flow 2 in the fifth generation wireless communication system are mapped as a group to the service bearer 1 of the access layer of the 5th generation wireless communication system, and the service flow 3 and the service flow 4 are mapped as a group The service bears on 2.
  • a service flow is obtained by filtering a service data flow by using a Traffic Flow Template (TFT) template.
  • TFT template refers to some characteristics of a service data flow.
  • IP 5-tuple refers to a source address, a destination address, a source port number, and a destination port number of a service data flow, and a transmission protocol used.
  • the TFT template can be constructed by using specific values of several elements in the 5-tuple, so that the service flow with specific quality of service parameters can be filtered out from the service data stream.
  • a service flow corresponds to a specific quality of service parameter, and the quality of service parameter corresponding to the TFT template can be configured by the wireless communication system.
  • a set of service flows may be identified by a fifth generation wireless communication system, such as the fifth generation control plane core network device, at the NAS layer by assigning a unique group identity at the NAS layer to identify the service flow group.
  • a fifth generation wireless communication system such as the fifth generation control plane core network device
  • a set of service flows may also be identified by a fifth generation wireless communication system, such as the fifth generation control plane core network device, at the access layer by assigning a unique group identifier at the access layer to identify the service flow group.
  • a group of service flows are mapped to a service bearer, the identity of the service bearer can be used as the group identifier of the set of flows.
  • the group identifier of a group of service flows may also be different from the identifier of the service bearer of the access layer mapped by the set of service flows in the fifth generation wireless communication system. In this case, the group identifier of the group of flows One-to-one correspondence with the identifiers of the service bearers mapped to the access layer.
  • message 2 may also include a PDU session identifier of the service flow.
  • the PDU session identifier of each service flow group can be carried.
  • the message 2 carries the identifier of the wireless access device of the wireless communication system to which the handover is requested.
  • the wireless access device of the wireless communication system that is requested to be handed over is an evolved wireless access device in the LTE system.
  • the fifth generation control plane core network device After receiving the message 2, the fifth generation control plane core network device generates a service quality rule for each service flow in the NAS layer provided by the fifth generation wireless communication system for the service of the user equipment.
  • the QoS rule includes at least one of a QoS parameter, a TFT template, and a TFT priority corresponding to the service flow.
  • the fifth generation control plane core network device maps a set of service flows to one service bearer in the LTE system, and different sets of service flows are mapped to different service bearers in the LTE system. Specifically, the fifth generation control plane core network device combines a service quality parameter of a service flow and a traffic flow template (TFT) to obtain a service bearer of the service flow in the LTE system.
  • the configuration information of the service bearer includes at least one of a TFT, a TFT priority and a quality of service parameter, and an identifier of the service bearer.
  • the identifier of the service bearer is the same as the group identifier of the group of service flows, or the identifier of the service bearer in the LTE system and the set of service flows are in the NAS layer or access of the fifth generation wireless communication system.
  • the group identifiers of the layers correspond one-to-one.
  • the configuration information of the service bearer of the service flow in the LTE system further includes a PDU session identifier.
  • the fifth generation control plane core network device sends the configuration information of the service bearer in the LTE system to the mobility management entity (MME) in the LTE system.
  • MME mobility management entity
  • the mobility management entity sends, by using the message 4, configuration information of the service bearer to a serving gateway (S-GW).
  • S-GW serving gateway
  • the serving gateway sends the configuration information of the LTE system service bearer to the fifth-generation user plane core network device by using the message 5.
  • the indication information may be further included, where the indication information indicates that the configuration information of the LTE system service bearer is generated by the fifth generation control plane core network device.
  • the fifth generation user plane core network device updates the configuration information of the service bearer, and the The service bearer updated configuration information is sent to the service gateway through the message 6, and the service gateway sends the updated configuration information of the service bearer to the mobility management entity through the message 7.
  • the fifth generation user plane core network device if the fifth generation user plane core network device allows the configuration of the service bearer, the fifth generation user plane core network device notifies, by using a message 6, that the configuration of the service bearer of the serving gateway is allowed. .
  • the service included in the message 6 carries the updated configuration information. If the configuration information of the service bearer is not updated, the message 6 may include the configuration information of the service bearer in the message 5, and the message 6 may not include the configuration information of the service bearer in the message 5. If the message 6 does not include the configuration information of the service bearer in the message 5, after the service gateway receives the message 6, the configuration information of the service bearer is not updated by default.
  • the serving gateway sends the configuration information of the service bearer to the mobility management entity by using a message 7.
  • the configuration information of the service bearer included in the message 7 is updated. If the configuration information of the service bearer has not been updated, the message 7 includes the configuration information of the service bearer in the message 5.
  • the mobility management entity After receiving the message 7, the mobility management entity notifies the evolved wireless access device to perform handover preparation by using the message 8.
  • the message 8 includes configuration information of at least one service bearer of the entire path between the user equipment and the core network.
  • the configuration information of the at least one service bearer of the entire path between the user equipment and the core network includes configuration information carried by the user equipment and the access network, and the access network and the core network Configuration information carried between.
  • the message 8 further includes a destination address of the user equipment to send uplink data, where the destination address is an address of the serving gateway.
  • the evolved radio access device further notifies the allowed service bearer or the unallowed service bearer in the at least one service bearer in the mobile management entity message 8 when the handover preparation is successful.
  • the mobility management entity notifies, by using the message 9, that the fifth generation control plane core network device handover preparation is successful.
  • the mobile service entity when the mobility management entity notifies the fifth-generation control plane core network device that the handover preparation is successful, notifies the handover of the service bearer identifier that is successfully prepared and the service quality provided by the service bearer that is successfully prepared for handover.
  • the message 9 further includes tunnel information for performing data back-transmission tunneling, where the tunnel information includes a tunnel identifier, a tunnel address, and the like.
  • the reverse tunnel can be established on the direct interface between the fifth generation wireless access device and the evolved wireless access device of the target LTE system, or can be established through an indirect interface, for example, through the fifth generation user plane core.
  • the network device and the core network user plane device of the target LTE system establish a reverse tunnel.
  • the reverse tunnel can be established separately for the uplink and downlink of each group of service flows.
  • the reverse tunnel can be segmented and adopts different granularity, that is, the tunnel in the fifth generation system adopts the granularity of establishing the reverse tunnel according to the PDU session, and the target LTE system adopts the granularity according to the granularity of the service bearer to establish the reverse tunnel.
  • the back-end data is reversed, and the fifth-generation wireless communication system forwards the downlink back-transmission data to the fifth-generation user plane core network device (UPGW) through the tunnel established by the PDU session, where the back-transmitted data packet header carries The identity of the service flow, which can be mapped to the quality of service of the service flow.
  • UPGW fifth-generation user plane core network device
  • the fifth generation user plane core network device transmits the data packet of each service flow in the service flow group to the corresponding reverse tunnel according to the mapping relationship between the NAS layer service flow group and the NAS layer service bearer in the target LTE system. And remove the identity of the service flow of the packet header.
  • the evolved radio access device preferentially transmits the data packet received from the reverse tunnel, and then transmits the new data packet received from the user plane core network device.
  • the reverse tunnel may be established according to the user equipment, and the reversed data packet carries the identifier of the service flow and the PDU session identifier.
  • the data back propagation tunnel is established between the fifth generation wireless communication system and the fifth generation user plane core network device.
  • the fifth generation wireless communication system forwards the downlink backhaul data to the fifth generation user plane core network device (UPGW) through the tunnel established by the PDU session, wherein the backhaul data packet carries the identifier of the service flow, and the identifier can be mapped. Quality of service rules to the service flow.
  • the fifth generation user plane core network device sends the data packet of the service flow to the downlink tunnel corresponding to the corresponding service bearer according to the mapping relationship between the service flow group and the service bearer in the target LTE system.
  • the fifth generation user plane core network device preferentially sends the data packet received from the reverse tunnel, and then sends the new data packet to the evolved wireless access device in the LTE system, for example, a new service data stream from the Internet.
  • the fifth generation control plane core network device notifies the fifth generation wireless access device to perform handover by using a message 10.
  • the message 10 includes at least one set of service flows receivable in the LTE system, and tunnel information (optional) of the at least one set of service flows for data back-transmission.
  • a set of service flows may be indicated by an access stratum group identity or a non-access stratum group identity.
  • the service flow group may be indicated by using an access layer identifier or a non-access stratum identifier of a service bearer in the corresponding LTE system.
  • the fifth-generation wireless access device reverse-transmits the downlink data, and the back-transmission data may include all PDCP SDUs (PDCP Service Data Units) that have not received the acknowledgment from the user equipment, or all PDCP SDUs that have not been sent to the user equipment.
  • the new data obtained from the fifth generation user plane core network device is also back-transferred to the target evolved wireless access device of the target LTE system.
  • the fifth generation wireless access device notifies the user equipment to access the wireless access device in the LTE system by using a message 11.
  • the message 11 includes the service quality information of the NAS layer service bearer that is successfully prepared for handover, and the correspondence between the identifier of the NAS layer service bearer and the bearer service quality information in the LTE system, where the NAS in the LTE system Correspondence between the identifier of the layer service bearer and the radio bearer of the radio access device in the LTE system. Further, the correspondence between the identifier of the NAS layer service bearer in the LTE system and the group identifier of a group of service flows in the fifth generation wireless communication system may also be included.
  • the service quality information includes information such as a TFT template and a TFT priority.
  • the QoS information further includes a correspondence between an identifier of an AS layer service bearer in the fifth generation wireless communication system and a radio bearer of the radio access device in the LTE system.
  • the user equipment accesses the evolved base station in the LTE system by using the message 12, and starts to transmit data.
  • the user equipment may start transmitting data packets (eg, PDCP service data units) that are not started to be transmitted in the fifth generation wireless communication system, and transmit data on the corresponding service bearers according to the required quality of service of the data packets.
  • data packets eg, PDCP service data units
  • the user equipment sends a data packet (eg, a PDCP service data unit, PDCP SDU) that is not confirmed to be transmitted in the fifth generation wireless communication system, on the corresponding radio bearer.
  • a data packet eg, a PDCP service data unit, PDCP SDU
  • the access device sends the uplink data packet on a corresponding radio bearer.
  • the user equipment sends the uplink data packet to the radio access device corresponding to the radio bearer of the access layer according to the radio bearer of the access layer in the fifth generation wireless communication system.
  • the user equipment first transmits a data packet that is not confirmed to be successfully transmitted in the fifth generation wireless communication system, and then transmits a data packet obtained by using the service quality information of the service bearer configured by the LTE system.
  • the uplink data packet is sent on the corresponding radio bearer by using a correspondence between the identifier of the service bearer in the LTE system and the radio bearer in the radio access device in the LTE system.
  • the associated wireless access device in the LTE system notifies the mobility management entity that the user equipment has accessed through the message 13.
  • the mobility management entity notifies the serving gateway by using the message 14 to switch the channel for data transmission to the LTE system.
  • the message 14 contains the address of the transport tunnel and the transport tunnel identifier of the service bearer.
  • the serving gateway notifies the fifth-generation user plane core network device that the service of the user equipment is switched to the LTE system by using a message 15.
  • the address of the transmission tunnel and the transmission tunnel identifier are included in the message 15.
  • the fifth generation user plane core network device converts the processing type of the service bearer of the NAS layer from a service flow (or a service flow group) to a service bearer of the NAS layer, and switches the tunnel of the service bearer to the SGW. And sending an end identifier on the data channel of the service flow.
  • the mobility management entity notifies the fifth generation user plane core network device to release the context of the user equipment, and the fifth generation user plane core network device notifies the fifth generation wireless access device to release the user.
  • the context of the device is notifies the fifth generation wireless access device to release the user.
  • the mapping of the NAS layer service flow group (NAS layer service bearer group) to the NAS layer service bearer in the LTE system is performed by the fifth generation control plane core network device, where the service of the user equipment is After the handover to the LTE system, the service continuity after the service of the user equipment is switched to the LTE system can be improved.
  • this embodiment provides an inter-system information interaction method, as shown in FIG.
  • This embodiment is a further supplement and refinement of the method embodiment shown in FIG. 3, and the duplicate content may not be described again.
  • the first wireless communication system is a fifth generation communication system
  • the first wireless communication system is a fifth generation wireless communication system
  • the second wireless communication system is an LTE system
  • the second The wireless communication system is an LTE wireless communication system.
  • the present embodiment is mainly concerned with the handover of the service of the user equipment from the fifth generation wireless communication system to the LTE wireless communication system.
  • 601-603 is the same as 501-503.
  • the fifth generation control plane core network device receives the message 2, and the fifth generation wireless communication system in the message 2 provides the service quality of the service quality of each service flow of the NAS layer for the service of the user equipment.
  • the identity is forwarded by message 3 to the mobility management entity under the LTE system.
  • the group identifier of each service flow group in the NAS layer is also included.
  • the group identifier of each service flow group of the corresponding AS layer is also included.
  • the message 3 further includes a QoS rule of the service flow, where the QoS rule includes a QoS parameter, a TFT template, and a TFT priority corresponding to the service flow. Further, the message 3 may further include a PDU session identifier of the service flow.
  • the mobility management entity receives the quality of service identifier of the quality of service of each service stream of the NAS layer provided by the fifth generation wireless communication system in the message 3 for the service data flow of the user equipment, and generates each service.
  • the fifth generation control plane core network device in the 505 is similar to the configuration information of the service bearer in the LTE system, and the mobility management entity maps a group of service flows to a service bearer in the LTE system. Different sets of flows are mapped to different service bearers in the LTE system. Specifically, the mobility management entity combines a service quality parameter of a set of service flows and a traffic flow template (TFT) to obtain configuration information of the service bearer of the set of flows in the LTE system, where The configuration information of the service bearer includes the TFT, the TFT priority and the QoS parameter, and the identifier of the service bearer.
  • TFT traffic flow template
  • the identifier of the service bearer is the same as the group identifier of the group of service flows, or the identifier of the service bearer corresponds to the group identifier of the group of service flows at the NAS layer or the access layer.
  • the mobility management entity performs mapping of the service quality of the service flow to the bearer in the LTE system to ensure continuity of data transmission during the handover process.
  • step 605 a service bearer in the LTE system generated by the mobility management entity does not have a one-to-one correspondence with the service flow group. Then, the mobility management entity notifies the configuration information of the LTE system service bearer to the fifth generation control plane core network device. Further, the LTE system indicates that the service bearer and the service flow group of the fifth generation wireless communication system are not in one-to-one correspondence.
  • the control plane core network device of the fifth generation wireless communication system generates a new service flow group according to the configuration information of the service bearer of the LTE system, and sends the new service flow group to the fifth generation wireless access device.
  • the fifth generation wireless access device performs reconfiguration based on the new service flow group information to perform reconfiguration of the mapping relationship between the service flow and the radio bearer. The remaining steps are the same as 606-618.
  • this embodiment provides an inter-system information interaction method, such as the interaction diagram of the inter-system information interaction method shown in FIG.
  • This embodiment is a further supplement and refinement of the method embodiment shown in FIG. 3, and the duplicate content may not be described again.
  • the first wireless communication system is a fifth generation communication system
  • the first wireless communication system is a 5th generation wireless communication system
  • the second wireless communication system is an LTE system
  • the second The wireless communication system is an LTE wireless communication system.
  • the present embodiment mainly relates to handover of a service of the user equipment from a 5th generation wireless communication system to the LTE wireless communication system.
  • the fifth generation control plane core network device sends a message 3 to the mobility management entity, where the message 3 carries each of the NAS layers provided by the fifth generation wireless communication system for the service of the user equipment. Service quality of the service flow.
  • the group identifier of each service flow group in the NAS layer is also included.
  • the group identifier of each service flow group of the corresponding AS layer is also included.
  • the message 3 further includes a QoS rule of the service flow, where the QoS rule includes a QoS parameter, a TFT template, and a TFT priority corresponding to the service flow.
  • the message 3 may further include a PDU session identifier of the service flow.
  • the mobility management entity sends a message 4 to the serving gateway, where the message 4 carries the quality of service of each service data stream in the NAS layer provided by the fifth generation wireless communication system for the service of the user equipment.
  • the group identifier of each service flow group in the NAS layer is also included.
  • the group identifier of each service flow group of the corresponding AS layer is also included.
  • the message 4 further includes a QoS rule of the service flow, where the QoS rule includes a QoS parameter, a TFT template, and a TFT priority corresponding to the service flow.
  • the message 4 may also include a PDU session identifier of the service flow.
  • the service gateway sends a message 5 to the fifth-generation user plane core network device, where the message 5 carries each service in the NAS layer provided by the fifth-generation wireless communication system for the service of the user equipment.
  • the quality of service of the stream is the quality of service of the stream.
  • the group identifier of each service flow group in the NAS layer is also included.
  • the group identifier of each service flow group of the corresponding AS layer is also included.
  • the message 5 further includes a QoS rule of the service flow, where the QoS rule includes a QoS parameter, a TFT template, and a priority corresponding to the service flow. Further, the message 5 may further include a PDU session identifier of the service flow.
  • the fifth-generation user plane core network device generates, according to the service quality of each service flow in the NAS layer provided by the fifth-generation wireless communication system for the service of the user equipment, a group in which each service flow is located in an LTE system. Configuration information carried by the service.
  • the fifth generation user plane core network device maps a group of service flows to the LTE system.
  • the next service bearer is mapped to different service bearers in the LTE system.
  • the fifth generation user plane core network device combines a service quality parameter and a service data flow template of a set of service flows, thereby obtaining configuration information of the service bearer of the set of flows in the LTE system, where the service bearer
  • the configuration information includes TFT, TFT priority and quality of service parameters, and identifiers of the service bearers.
  • the identifier of the service bearer is the same as the group identifier of the group of service flows, or the identifier of the service bearer and the group identifier of the set of service flows at the NAS layer or the access layer. correspond.
  • the fifth generation user plane core network device sends a message 6 to the serving gateway, where the message 6 carries configuration information of the service bearer.
  • the technical solution provided by the embodiment of the present invention improves the continuity in the handover process of the user equipment by establishing a service flow group of the NAS layer of the fifth generation wireless communication system to a service bearer of the NAS layer of the LTE system.
  • the corresponding determination is performed by the fifth generation user plane core network device. Therefore, after the service of the user equipment is switched to the LTE system, the service continuity can be ensured, and the experience of the service of the user equipment after switching to the LTE system is improved.
  • this embodiment provides an inter-system information interaction method, such as the interaction diagram of the inter-system information interaction method shown in FIG.
  • This embodiment is a further supplement and refinement of the method embodiment shown in FIG. 3, and the duplicate content may not be described again.
  • the second wireless communication system is a fifth generation communication system, and the second wireless communication system is a fifth generation wireless communication system;
  • the first wireless communication system is an LTE system, and the first The wireless communication system is an LTE wireless communication system.
  • the present embodiment is mainly concerned with the handover of the service of the user equipment from the LTE wireless communication system to the 5th generation wireless communication system.
  • the user equipment sends a message 1 carrying a measurement report to the evolved wireless access device.
  • the measurement report includes a measurement result of a signal strength and a received signal quality of a signal transmitted by the fifth generation wireless access device.
  • the evolved wireless access device determines, according to the measurement report reported by the user equipment, that the user equipment is switched to a fifth generation wireless communication system where the fifth generation wireless access device is located. .
  • the evolved wireless access device may determine whether the signal strength or the signal reception quality in the measurement report satisfies a handover condition. For example, if the evolved radio access device determines that the signal strength or signal reception quality of the signal sent by the fifth generation radio access device exceeds a certain threshold, it is determined that the user equipment is switched to the fifth generation. In a wireless communication system.
  • the evolved radio access device sends a message 2 to the mobility management entity, where the message 2 includes the identifier of the target radio access device to be switched to (in this embodiment, the identifier of the fifth generation radio access device) And the reason for the switch.
  • the mobility management entity After receiving the message 2, the mobility management entity sends a message 3 to the fifth generation control plane core network device in the fifth generation wireless communication system.
  • the message 3 indicates that the LTE system is configured for at least one service bearer provided by the service of the user equipment, and the configuration information of the at least one service bearer includes an identifier of the at least one service bearer, and a quality of service parameter.
  • the configuration information of the at least one service bearer further includes a TFT and a TFT priority corresponding to the service bearer of the user equipment.
  • a service bearer includes a bearer between the user equipment and the access network and a bearer between the core network and the access network.
  • the bearer between the user equipment and the access network in the service bearer is also called a radio bearer
  • the bearer between the core network and the access network is called an S1 bearer and an S5 bearer.
  • the fifth generation control plane core network device receives the message 3, and generates, according to the service bearer configuration information of the user equipment service, the fifth generation wireless communication system to satisfy the service data of the user equipment.
  • the service quality of the stream requires configuration information for each service flow.
  • the fifth generation control plane core network device generates configuration information of each service flow according to the configuration information of the service bearer in the LTE system, where the configuration information of each service flow includes the LTE system.
  • Each service bearer of the user equipment service is divided into multiple groups, one service bearer corresponds to one group, and each group includes at least one service flow.
  • Different service flows have different group identifiers in the NAS layer in the fifth generation wireless communication system; different service flows have different flow identifiers, different TFTs and TFT priorities, and different service flows provide different service quality.
  • the fifth generation control plane core network device sends a handover request to the fifth generation wireless access device by using a message 4.
  • Message 4 contains the group ID of each set of service flows at the NAS layer and the flow identifier of each service flow in each set of service flows.
  • Message 4 also contains indication information indicating the quality of service parameters provided by each service flow.
  • the message 4 further includes a quality of service parameter corresponding to the indication information of the quality of service.
  • the flow identifier has a correspondence relationship with the indication information of the service quality parameter, or the flow identifier indicates the quality of service parameter.
  • the message 4 further includes indication information for establishing a service bearer according to the service flow group, and instructing the radio access network device to establish the radio bearer according to the service flow group. That is, each service flow group corresponds to one radio bearer.
  • the indication information may also be indicated in an implicit manner, such as implicitly by the NAS layer group identification of the service flow group.
  • the message 4 may further include a PDU session identifier of the service flow or service flow group. 807.
  • the fifth generation wireless access device receives the message 4, and maps the service flows of the same group to the same radio bearer through the access layer.
  • the fifth generation wireless access device sends a message 5 to the fifth generation control plane core network device.
  • message 5 the group that successfully maps in 807 and the group that fails to map are indicated.
  • the message 5 further includes tunnel information of the data back-transmission, where the tunnel information includes one or more of address information, identification information, and the like of the tunnel.
  • the successfully mapped group is the service flow group corresponding to the radio bearer that is successfully prepared for handover on the target side.
  • the reverse tunnel is corresponding to the successfully mapped service flow group, and one service flow group corresponds to a reverse tunnel. The reverse tunnel is established between the evolved wireless access device and the fifth generation wireless access device.
  • the fifth generation wireless access device is further configured to receive indication information according to the service flow group indicated by the control plane core network device. Further, the indication information may be indicated according to a radio bearer corresponding to the service flow group or the service flow group.
  • the fifth generation wireless access device may perform admission and mapping according to the service flow group, and then go to 809. If the fifth generation wireless access device does not accept and map according to the service flow group, reference may be made below. Another embodiment is depicted in Figure 9.
  • the fifth generation control plane core network device notifies the mobility management entity of the successfully mapped group and the corresponding tunnel information of the data backhaul through the message 6.
  • the message 6 also indicates the service bearer corresponding to the service flow group that is successfully mapped.
  • the mobility management entity sends a message 7 to the evolved wireless access device, where the message 7 includes a handover instruction indicating the user equipment to the fifth generation wireless communication system.
  • the message 7 further includes reverse tunnel information of the group that successfully maps from the evolved wireless access device to the fifth generation wireless access device for data back-transmission.
  • the reversed transmission data is transmitted between the evolved wireless access device and the fifth generation wireless access device by using a reverse tunnel, and the reversed data includes a PDCP service that is not received by the user equipment and confirmed to be correctly received in the LTE system.
  • the back-propagation data further includes new data to be sent to the user equipment.
  • the evolved wireless access device sends a handover instruction to the user equipment by using a message 8 to the user equipment.
  • the message 8 also indicates that the fifth generation wireless communication system is a service flow of the service of the user equipment, a quality of service rule of the service flow, and the service flow group corresponds to a NAS layer or an AS layer service in the LTE system. Hosted.
  • the user equipment switches the service to the fifth generation wireless access device by using the message 9, and transmits the data according to the service flow indicated in the message 8 and the wireless bearer mapped by the fifth generation wireless access device. .
  • the user equipment sends a data packet (for example, a PDCP SDU) that is not confirmed to be successfully transmitted in the LTE radio communication system to the corresponding radio bearer, where the user equipment is based on the service bearer and the fifth in the LTE system.
  • a data packet for example, a PDCP SDU
  • the correspondence between the identifiers of the service flow groups in the wireless communication system, and the correspondence between the identifiers of the service flow groups and the wireless bearers in the fifth generation wireless access device, on the corresponding wireless bearers in the fifth generation wireless access device And sending the uplink data packet.
  • the user equipment sends the data according to the service flow on a radio bearer of the LTE system.
  • the user equipment sends the data according to the radio bearer in the fifth generation wireless communication system corresponding to the radio bearer in the LTE system in the LTE system.
  • the user equipment first sends a data packet that is not confirmed to be successfully transmitted in the LTE system, and then transmits a data packet obtained by the service quality information of the service carried by the fifth generation wireless communication system.
  • the fifth generation wireless access device sends a message 10 to a fifth generation control plane core network device to indicate that the user equipment is successfully switched.
  • the fifth generation control plane core network device performs the service flow of the service of the user equipment and the bearer of the service flow mapping, to continuously improve the user.
  • the quality of service of the equipment is the fifth generation control plane core network device.
  • the fifth generation control plane core network sends a message 11 to the fifth generation user plane core network device to perform the service of the user equipment, and switches the service of the LTE system to the fifth generation wireless communication system.
  • the message 11 includes a service quality rule of the service flow of the service of the user equipment, and includes at least one of a service quality parameter, a TFT, and a TFT priority.
  • the fifth generation control plane core network device notifies the mobility management entity to release the context of the user equipment in the LTE system by using a message 12.
  • the mobility management entity notifies the evolved wireless access device to release a context of the user equipment.
  • the technical solution provided by the embodiment of the present invention improves the continuity in the handover process of the user equipment by establishing a service flow group of the NAS layer of the fifth generation wireless communication system to a service bearer of the NAS layer of the LTE system.
  • Another aspect of the embodiments of the present invention provides a method for interacting service information between systems, as shown in FIG.
  • Message 1 - Message 4 The transmission of Message 1 - Message 4 is the same as the embodiment shown in FIG. Further, the present embodiment is described from message 5 to message 14. This embodiment can be implemented as a single embodiment independently or in combination with the embodiment shown in FIG.
  • the fifth generation wireless access device sends a message 5 to the fifth generation control plane core network device, and the message 5 includes the service flow group corresponding to the radio bearer established in the fifth generation wireless access device handover preparation.
  • the message 5 includes the fifth-generation wireless access device side endpoint information corresponding to the PDU session tunnel that the successful downlink service flow is admitted.
  • the message 5 further includes tunnel information of the data back-transmission, where the tunnel information includes one or more of address information, identification information, and the like of the tunnel.
  • the successfully mapped group is the service flow group that is successfully prepared for handover in the fifth generation wireless communication system.
  • the reverse tunnel is corresponding to the PDU session of the successfully mapped service flow group, and one PDU session corresponds to a reverse tunnel.
  • the reverse tunnel may be in one-to-one correspondence with the service flow.
  • the reverse tunnel is established between the fifth generation wireless access device and the fifth generation user plane core network device. Can be defined as a target side back tunnel.
  • the LTE system reverse tunneling refers to establishing a reverse tunnel between the evolved base station and the fifth generation user plane core network equipment.
  • the fifth generation control plane core network device notifies the fifth generation user plane core network device of the successfully mapped service flow and the target side back propagation tunnel information by using the message 6, the reverse tunnel information including the target side back propagation tunnel One or more of address information, identification information, and the like.
  • the message 6 further includes a QoS rule for the service flow of the service of the user equipment, including the QoS parameter, the TFT and the TFT priority.
  • the fifth generation user plane core network device notifies the LTE backhaul tunnel information by using the message 7.
  • the reverse tunnel is used by the evolved base station of the LTE system to backhaul the downlink data to the fifth generation user plane core network device.
  • the fifth generation user plane core network device side endpoint information corresponding to the PDU session tunnel of the uplink service flow is included.
  • the fifth generation control plane core network device notifies the mobility management entity through the message 8 that the service bearer of the handover request is received on the target side, and includes the bearer successfully received, the bearer that fails to be accepted, and the identifier of the bearer that is partially accepted successfully. .
  • the partially-accepted bearer means that only a part of the service flows corresponding to the bearer are successfully received on the target side.
  • the data back-transmission tunnel information of the source side is further included, and the tunnel of the data back-transmission corresponds to a service bearer on the source side, and may also correspond to a PDN link.
  • the mobility management entity sends a message 9 to the evolved base station, and the message 9 includes a handover instruction indicating the user equipment to the fifth generation wireless communication system.
  • the message 9 further includes the backhaul information of the service bearer successfully received on the target side from the evolved base station to the fifth generation user plane core network device, and the partial admission succeeds.
  • the service carries back-propagation information for data back-transfer from the evolved base station to the fifth-generation user plane core network device.
  • the downlink backhaul data includes a PDCP service data unit that does not receive the user equipment to confirm correct reception in the LTE system, or a PDCP service data unit that is not sent to the user equipment in the LTE system.
  • the back-propagation data further includes new data to be sent to the user equipment.
  • the evolved base station sends a handover instruction to the user equipment through the message 10 to the user equipment.
  • the message 10 further includes a service flow of the fifth generation wireless communication system as a service data flow of the user equipment, a service quality rule of the service flow, and a corresponding service bearer of the service flow group in the LTE system.
  • the user equipment switches the service data flow to the fifth generation wireless access device by using the message 11, and transmits according to the service flow indicated in the message 10 and the radio bearer mapped on the fifth generation wireless access device. data.
  • the fifth generation wireless access device sends a message 12 to a fifth generation control plane core network device to indicate that the user equipment handover is successful.
  • the fifth generation control plane core network sends a message 13 to the fifth generation user plane core network device to perform a service flow of the user equipment switching from a service bearer of the LTE system to a fifth generation wireless communication system.
  • the fifth generation user plane core network switches the downlink data tunnel.
  • the fifth generation user plane core network device receives the back-transmitted data from the evolved base station on the source side, and sends the back-transmission data to the fifth-generation wireless access device.
  • the evolved base station transmits the back-transmission data to the fifth-generation user plane core network device through the reverse tunnel.
  • the reverse tunnel is established per service bearer or PDN link.
  • the evolved base station indicates the end of the backhaul data by each tunnel, for example, using an end identifier. That is, it may indicate that the data back-transmission of each service bearer ends, and may also indicate the end of all back-transmission data of the PDN.
  • the back-propagation data includes a PDCP service data unit that does not receive the user equipment to confirm correct reception in the LTE system, or a PDCP service data unit that is not sent to the user equipment in the LTE system.
  • the back-propagation data further includes new data to be sent to the user equipment.
  • the fifth-generation user-side core network device receives the back-transmission data. According to the service quality rule of the service flow, the back-transmission data is divided into the service flow accepted by the target side, and the back-transmission data of the service flow that is not accepted by the target side is also discarded.
  • the fifth-generation user plane core network device transmits the back-transmission data to the fifth-generation wireless access device on the target side through the target-side back-transmission tunnel.
  • the reverse tunnel is established per service flow or PDU session.
  • the fifth generation user plane core network device indicates the end of the backhaul data for each tunnel, for example, using an end identifier.
  • the fifth-generation wireless access device on the target side preferentially transmits the reverse-transmitted data packet, and then transmits the newly transmitted data packet of the fifth-generation user-side core network device.
  • the fifth generation wireless communication system does not establish a reverse tunnel, and the fifth generation user plane core network transmits the backhaul data by switching the PDU session tunnel of the service flow established in the preparation phase.
  • the fifth generation user plane core network first transmits the backhaul data received from the LTE system, and then sends new data.
  • the fifth generation control plane core network device notifies the mobility management entity by message 14 to release the context of the user equipment in the LTE system.
  • the mobility management entity notifies the evolved base station to release the context of the user equipment.
  • the technical solution provided by the embodiment of the present invention improves the continuity in the handover process of the user equipment by establishing a service flow group of the NAS layer of the fifth generation wireless communication system to a service bearer of the NAS layer of the LTE system.
  • the corresponding determination is performed by the fifth generation control plane core network device, so that the data packet transmission discontinuity of the service of the user equipment from the LTE system to the fifth generation wireless communication system may be avoided.
  • the fifth embodiment provides an inter-system information interaction method, and the interaction diagram between the inter-system information interaction methods is shown in FIG.
  • the first wireless communication system is a fifth generation communication system
  • the first wireless communication system is a 5th generation wireless communication system
  • the second wireless communication system is an LTE system
  • the second The wireless communication system is an LTE wireless communication system.
  • the present embodiment is primarily concerned with the handover of a traffic data stream of the user equipment from a 5th generation wireless communication system to the LTE wireless communication system.
  • the user equipment sends a message 1 carrying the measurement report to the fifth generation wireless access device.
  • the measurement report includes measurement results of signal strength and received signal quality of signals transmitted by the eNB, such as RSRP and RSRQ.
  • the fifth generation wireless access device determines to switch the user equipment to the LTE system where the eNB is located according to the measurement report reported by the user equipment.
  • the fifth generation wireless access device may determine whether the signal strength or the signal reception quality in the measurement report satisfies a handover condition.
  • the handover condition can be specifically referred to the definition of the 3GPP protocol.
  • the fifth generation radio access device determines that at least one of the RSRP and the RSRQ exceeds a certain threshold, and determines to switch the user equipment to the LTE system where the eNB is located.
  • the fifth generation wireless access device reconfigures all the service flows into one radio bearer. Specifically, for the uplink, the fifth generation radio access device notifies the terminal of the mapping relationship between the uplink service flow and the radio bearer, for example, through the RRC letter. The way of making.
  • the terminal maps the upstream service flow to the radio bearer.
  • the radio bearer may be a default radio bearer.
  • the default radio bearer refers to a radio bearer established by a fifth generation radio access device established in a PDU session establishment phase to serve a service flow of a default quality of service.
  • the fifth generation wireless access device sends the message 2 carrying the handover request to the fifth generation control plane core network device, where the message 2 carries the identifier information of the PDU session corresponding to the default bearer.
  • the fifth generation control plane core network device After receiving the message 2, the fifth generation control plane core network device sends the identifier information of the PDU session corresponding to the default bearer in the message 2 to the mobility management entity in the LTE system by using the message 3. MME).
  • the mobility management entity establishes a PDU session identified in message 2 by using message 4, message 5, and message 6, message 7.
  • the mobility management entity instructs the evolved base station to establish a default bearer by message 8. If the default bearer is successfully established, the handover preparation of the default bearer of the fifth generation wireless communication system is successful.
  • the mobility management entity notifies, by using the message 9, that the fifth generation control plane core network device handover preparation is successful.
  • the message 9 further includes tunnel information for performing data back-transmission, where the tunnel information includes a tunnel identifier, a tunnel address, and the like.
  • the back propagation tunnel may be established on a direct interface between the fifth generation wireless access device and the target LTE system evolved base station, or may be established through an indirect interface, for example, through a fifth generation user plane core network device or The core network user plane device of the LTE system establishes a reverse tunnel.
  • the reverse tunnel is established according to each default bearer.
  • the fifth generation control plane core network device notifies the fifth generation wireless access device to perform handover by using a message 10.
  • the fifth-generation wireless access device reverse-transmits the downlink data, and the back-transmission may include all PDCP SDUs (PDCP service data units) that have not received the terminal confirmation, or all PDCP SDUs that have not been sent to the terminal, and
  • the new data obtained from the fifth generation user plane core network device is back-transferred to the evolved base station of the LTE system.
  • the fifth generation wireless access device notifies the user equipment to access the wireless access device in the LTE system by using a message 11.
  • the message 11 includes the configuration information of the service bearer that is successfully prepared for handover, and the configuration information of the service bearer includes the service quality information of the service bearer, and the identifier of the service bearer and the bearer service quality information.
  • the correspondence between the identifier of the service bearer and the radio bearer of the radio access device in the LTE system corresponds to the configuration information of the service bearer that is successfully prepared for handover.
  • the user equipment accesses the wireless access device in the LTE system by using the message 12, and starts to transmit data.
  • the user equipment may start transmitting data packets (eg, PDCP service data units) that are not started to be transmitted in the fifth generation wireless communication system, and transmit data on the corresponding service bearers according to the required quality of service of the data packets.
  • data packets eg, PDCP service data units
  • the user equipment sends a data packet (eg, a PDCP service data unit, a PDCP SDU) that is not transmitted in the fifth generation wireless communication system on the corresponding radio bearer.
  • the user equipment sends the uplink data packet on the corresponding radio bearer according to the correspondence between the service flow and the identifier of the service bearer and the correspondence between the identifier of the service bearer and the radio bearer in the evolved base station.
  • the user equipment sends the data on the radio bearer of the evolved base station corresponding to the radio bearer in the fifth generation wireless communication system according to the service flow.
  • the user equipment first transmits, and the transmitted data packet is not confirmed in the fifth generation wireless communication system. And transmitting the data packet obtained by the service quality information of the service bearer configured by the LTE system. Specifically, the uplink data packet is sent on the corresponding radio bearer by using a correspondence between the identifier of the service bearer and the radio bearer of the evolved base station.
  • the evolved base station in the LTE system notifies the mobility management entity that the user equipment is accessed by using the message 13.
  • the mobility management entity notifies the serving gateway by using the message 14 to switch the channel for data transmission to the LTE system.
  • the message 14 contains the address of the transport tunnel and the transport tunnel identifier of the service bearer.
  • the serving gateway notifies, by using the message 15, that the service of the user equipment of the fifth generation user plane core network is switched to the LTE system.
  • the address of the transmission tunnel and the transmission tunnel identifier are included in the message 15.
  • the fifth generation user plane core network device converts the processing type of the service bearer from a service flow to a service bearer, and switches the tunnel carried by the service to the SGW, and is on the data channel of the service flow. Send the end identifier.
  • the mobility management entity notifies the fifth generation user plane core network device to release the context of the user equipment, and the fifth generation user plane core network device notifies the fifth generation wireless access device to release the user The context of the device.
  • the data back propagation tunnel is only established between the fifth generation wireless communication system and the fifth generation user plane core network device.
  • the fifth generation wireless communication system forwards the downlink backhaul data to the fifth generation user plane core network device (UPGW) through the tunnel established by the PDU session, wherein the backhaul data packet carries the identifier of the service flow, and the identifier can be mapped.
  • the fifth generation user plane core network device sends the data packet of the service flow to the downlink tunnel corresponding to the corresponding service bearer according to the mapping relationship between the service flow group and the service bearer in the target LTE system.
  • the fifth generation user plane core network device preferentially transmits the data packet received from the reverse tunnel, and then sends a new data packet, such as a new data packet from the external network.
  • the technical solution provided by the embodiment of the present invention improves the continuity in the handover process of the user equipment by establishing a service flow group of the NAS layer of the fifth generation wireless communication system to a service bearer of the NAS layer of the LTE system.
  • the corresponding determination is performed by the fifth generation control plane core network device.
  • the embodiments of the present invention provide a schematic diagram of a first wireless communication system, a second wireless communication system, a wireless access device, a core network device, and a user equipment for performing the foregoing method embodiments, as shown in FIG. - Figure 15 is shown. This will be described in detail below.
  • a further aspect of the embodiments of the present invention provides a wireless communication system that can perform the foregoing various method embodiments, where the wireless communication system is used as the first wireless communication system 1100, and the user equipment is transferred from the first wireless communication system.
  • the first wireless communication system and the second wireless communication system use different communication systems.
  • the first wireless communication system may be a fifth generation wireless communication system.
  • a service data stream of the user equipment in the fifth generation wireless communication system is carried in at least one service flow group (also called a service bearer group) of the NAS layer, and one service The data flows are filtered by the TFT template and can be respectively carried on each service flow in the service flow group.
  • a service flow group of the NAS layer of the fifth generation wireless communication system corresponds to a service bearer of the access layer of the fifth generation wireless communication system.
  • the second wireless communication system can be an LTE system.
  • the service data flow of the user equipment is carried on a service bearer of the NAS layer of the LTE system, and one service bearer of the NAS layer of the LTE system corresponds to one service bearer of the access layer of the LTE system.
  • the first wireless communication system 1100 includes a first device 1101 and a second device 1102.
  • the first device 1101 and the second device 1102 are logical functional entities.
  • the first device may be a wireless access device in the first wireless communication system or a core network device in the first wireless communication system
  • the second device may be a core network device in the first wireless communication system.
  • the core network device in the first wireless communication system may be a user plane core network device in the first wireless communication system or a control plane core network device in the first wireless communication system.
  • the first device 1101 is configured to determine to transfer the service data flow of the user equipment to the second wireless communication system.
  • the first device 1101 is a wireless access device, and the wireless access device may be configured to receive a measurement report from the user equipment, and according to the measurement report, the second wireless communication system (specifically, the wireless access of the second wireless communication system) The measurement of the signal strength and signal quality transmitted by the device determines that the traffic of the user equipment is transferred to the second wireless communication system.
  • the wireless access device may be configured to receive a measurement report from the user equipment, and according to the measurement report, the second wireless communication system (specifically, the wireless access of the second wireless communication system) The measurement of the signal strength and signal quality transmitted by the device determines that the traffic of the user equipment is transferred to the second wireless communication system.
  • the first device 1101 is a core network device, and the wireless access device may query or request the core network device of the first wireless communication system to perform service transfer according to the determination result of the measurement report.
  • the core network device determines the business transfer.
  • the second device 1102 is configured to send first information to the second wireless communication system, where the first information indicates that the service data flow of the user equipment is in one of the non-access layers of the first wireless communication system.
  • the service bearer group is a service bearer corresponding to the non-access stratum of the second radio communication system, and the one service bearer group includes at least two service bearers in the non-access stratum of the first radio communication system. .
  • the second device 1102 is a core network device, where the first device determines that a service transfer is to be performed, and the second device determines that the service bearer group of the NAS layer where the service data flow of the user equipment is located to the NAS layer of the second wireless communication system. The corresponding relationship of the bearer is notified to the second wireless communication system by the first information.
  • the second device is further configured to receive second information sent by the wireless access device in the first wireless communication system, where the second information identifies the service data flow in the first wireless communication system
  • At least one service bearer group in the non-access stratum each of the at least one service bearer group corresponds to one service bearer in the access layer of the first radio communication system, and the at least one service bearer group includes the a service bearer group; the second device is specifically configured to determine the correspondence according to the second information.
  • the second device may perform the actions performed by the core network device (including the control plane core network device or the user plane core network device) in the first wireless communication system in the foregoing various method implementations.
  • the first device is the wireless access device of the first wireless communication system
  • the actions of the wireless access device in the first wireless communication system in the foregoing various method embodiments may be performed.
  • the wireless access device 1300 in the first wireless communication system may include a transceiver 1302 and a processor 1301, where the transceiver 1302 is configured to perform wireless connection in the first wireless communication system in the foregoing various method embodiments.
  • the processor 1301 is configured to perform the acquisition, determination, and other processing actions of the wireless access device in the first wireless communication system in the foregoing method embodiments.
  • the core network device 1400 in the first wireless communication system may include a transceiver 1402 and a processor 1401, where the transceiver 1402 is configured to perform the transceiving action of the core network device in the first wireless communication system in the foregoing various method embodiments,
  • the processor 1401 is configured to perform acquisition, determination, and the like of the core network device in the first wireless communication system in the foregoing various method embodiments.
  • the second wireless communication system 1200 includes a first device 1201 and a second device 1202.
  • the first device 1201 is configured to determine that the service data flow of the user equipment is transferred from the first wireless communication system to the second wireless communication system.
  • the second device 1202 is configured to determine, in the non-access stratum of the second radio communication system, that the service data flow is in a non-access stratum of the second radio communication system.
  • a service bearer where the one service bearer group includes at least two service bearers in the non-access stratum of the first wireless communication system;
  • the second device 1202 is further configured to notify the first wireless communication system of the one service bearer.
  • the second device 1202 is further configured to receive third information from the first wireless communication system, where the third information indicates that the service data flow is not accessed by the first wireless communication system.
  • the bearer, the at least one service bearer group includes the one service bearer group
  • the second device is further configured to determine, according to the third information, that the service data stream is in a non-access stratum of the first wireless communication system
  • the one service bearer group is corresponding to the one service bearer in the non-access stratum of the second wireless communication system.
  • the second device 1202 may perform the actions performed by the core network device (including the control plane core network device or the user plane core network device) in the second wireless communication system in the foregoing various method implementations.
  • the first device is a wireless access device of the second wireless communication system
  • the actions of the wireless access device in the second wireless communication system in the foregoing various method embodiments may be performed.
  • the wireless access device 1300 in the second wireless communication system may include a transceiver 1302 and a processor 1301, where the transceiver 1302 is configured to perform wireless connection in the second wireless communication system in the foregoing various method embodiments.
  • the processor 1301 is configured to perform acquisition, determination, and the like of the wireless access device in the second wireless communication system in the foregoing method embodiments.
  • the wireless communication system performs information interaction with the second wireless communication system as a first wireless communication system, and the first wireless communication system and the second wireless communication system Using a different communication system, the first wireless communication system 1100 includes a first device 1101 and a second device 1102.
  • the first device 1101 is configured to determine that the service data flow of the user equipment is transferred from the second wireless communication system to the first wireless communication system, where the first wireless communication system and the second wireless communication system use different a communication system; a second device 1102, configured to receive fourth information from the second wireless communication system, the fourth information indicating that the service data stream is in a non-access layer of the second wireless communication system a service bearer; the second device, configured to determine, according to the fourth information, that the one service is carried in a service bearer group corresponding to a non-access stratum of the first wireless communication system, where the one service is The bearer group includes at least two service bearers in the non-access stratum of the first wireless communication.
  • the first device 1101 is specifically configured to: the core network device of the first wireless communication system splits the one service bearer according to the fourth information, and the service flow template and the service flow template priority. And determining, by the service, the one service bearer group that is carried in the non-access stratum of the first wireless communication system.
  • the second device 1102 may perform the actions performed by the core network device (including the control plane core network device or the user plane core network device) in the first wireless communication system in the foregoing various method implementations.
  • the first device is the wireless access device of the first wireless communication system
  • the actions of the wireless access device in the first wireless communication system in the foregoing various method embodiments may be performed.
  • the wireless access device in the first wireless communication system may include a transceiver and a processor, where the transceiver is configured to perform the sending and receiving operations of the wireless access device in the first wireless communication system in the foregoing various method embodiments.
  • the processor is configured to perform acquisition, determination, and the like of the wireless access device in the first wireless communication system in the foregoing various method embodiments.
  • the transceiver 1302 and the processor 1301 included in each wireless communication system wireless access device 1300 may be connected through a physical bus.
  • the transceiver 1402 and the processor 1401 included in the core network device 1400 in each wireless communication system may also be connected through a physical bus.
  • An embodiment of the present invention provides a user equipment 1500, where a service data flow of the user equipment is transferred from a first wireless communication system to a second wireless communication system, and includes: a receiving unit 1502 and a processing unit 1501.
  • the receiving unit 1502 is configured to receive a first notification sent by the first wireless communication system, where the first notification is used to notify a non-access of the service data flow of the user equipment in the first wireless communication system.
  • One service bearer group of the layer is corresponding to one service bearer in the non-access stratum of the second radio communication system, and the one service bearer group includes at least two of the non-access stratums of the first radio communication system Business bearer.
  • the processing unit 1501 is configured to transfer, according to the first notification, the service data flow from the one service bearer group on the non-access stratum of the first wireless communication system to the second wireless communication system The one service bearer on the non-access stratum.
  • Another embodiment of the present invention provides a user equipment 1500, where a service data flow of the user equipment is transferred from a first wireless communication system to a second wireless communication system, and includes: a receiving unit 1502 and a processing unit 1501.
  • the receiving unit 1502 is configured to receive a third notification sent by the second wireless communication system, where the third notification is used to notify that the service data flow of the user equipment is in a non-access layer of the first wireless communication system.
  • a service bearer group corresponding to one service bearer in the non-access stratum of the second radio communication system, where the one service bearer group includes at least two service bearers in the non-access stratum of the first radio communication system ;
  • the processing unit 1501 is configured to, according to the third notification, transfer the service data flow from the one service bearer group on the non-access stratum of the first wireless communication system to the second wireless communication system The one service bearer on the non-access stratum.
  • the user equipment 1500 receiving unit 1502 provided by various aspects of the embodiments of the present invention may be a receiver physically, and the processing unit 1501 is physically implemented as an upper processor, and the receiver and the processor may be connected through a physical bus. together.
  • the user equipment may further include a transmitter and other electronic circuits.
  • the wireless communication system and the user equipment provided by the embodiments of the present invention can avoid the problem of service data flow discontinuity caused by the second wireless communication system randomly assigning service bearers, thereby improving the experience of the user equipment.
  • RRC Radio Resource Control
  • Reflective QoS Quality of Service
  • Reflective QoS means that the service has the characteristics of uplink and downlink symmetry, that is, the uplink and downlink QoS are the same, and the uplink and downlink TFT filter templates are also symmetric.
  • the source address and source port number of the uplink are the destination address and destination port number of the downlink.
  • the destination address and destination port number of the uplink are the source address and source port number of the downlink.
  • the data radio bearer (DRB) on the air interface side is symmetric on the uplink and downlink, that is, the uplink and downlink provide the same QoS service. Therefore, the downlink service flow QoS flow with the Qos reversal characteristic and the corresponding uplink service flow QoS flow are mapped to the same DRB.
  • DRB data radio bearer
  • a method for saving control signaling is that the network side does not notify the terminal of the uplink QoS rule by signaling, but implicitly notifies the terminal by means of a downlink data packet. That is, the terminal receives the downlink data packet of the flow1 from the DRB1, inverts the 5-tuple of the downlink data packet header, and obtains the uplink TFT, and the index value of the QoS parameter corresponding to the TFT is flow1. Map to DRB1. Therefore, in this manner, the signaling of the QoS rule of the core network to notify the terminal is saved, and the air interface signaling that the wireless access device notifies the terminal to the DRB mapping relationship is saved.
  • the radio access device transmits the downlink data packet of flow1 in DRB1, and instructs the UE that the flow1 has the Qos reversal characteristic. Or, it is notified that a certain data packet of flow1 has a QoS reversal characteristic, for example, carrying the indication information in the packet header of the data packet.
  • the user equipment receives the data packet of flow1 in DRB1, and inverts the 5-tuple of the downlink data packet header to obtain an uplink TFT, and the index value of the QoS corresponding to the TFT is flow1. and the data of the uplink flow1 The packet is mapped to DRB1. In this way, the user equipment can obtain the mapping relationship between the uplink QoS flow of the flow1 and the DRB1 to the DRB and save it.
  • the radio access device performs the modification of the QoS flow to the DRB mapping relationship. For example, according to the radio resource management (RRM) algorithm, the flow1 needs to be mapped to the DRB2. Then, the wireless access device notifies the mapping relationship between the QoS flow1 and the DRB2 by means of RRC signaling.
  • RRM radio resource management
  • the terminal When the terminal receives the mapping relationship between QoS flow1 and DRB2 sent by the wireless access device, the terminal changes the mapping of the locally stored QoS flow1 to DRB, and updates the mapping to QoS flow1 to DRB2. The terminal transmits the QoS flow1 packet on DRB2.
  • the wireless access device configures the QoS flow to the DRB mapping relationship, for example, mapping the QoS flow1 to the DRB2 according to the RRM algorithm. Then, the wireless access device notifies the mapping relationship between the QoS flow1 and the DRB2 by means of RRC signaling.
  • the terminal receives the RRC signaling and acquires a mapping relationship between the uplink flow of the QoSflow1 and the DRB2 to the DRB, and saves the mapping relationship.
  • the terminal transmits the data of QoS flow1 on DRB2.
  • the radio access device modifies the mapping relationship between the QoS flow and the DRB. For example, through the RRM algorithm, it is decided to map the QoS flow1 to the DRB3.
  • the radio access device transmits the downlink data packet of QoS flow1 in DRB3, and instructs the UE to have the QoS reversal characteristic of the QoS flow1. Or, it is notified that a certain data packet of flow1 has a QoS reversal characteristic, for example, carrying the indication information in the packet header of the data packet.
  • the user equipment receives the data packet of the QoS flow1 in the DRB3, and learns that it has the inversion feature, and inverts the 5-tuple of the downlink packet header to obtain the uplink TFT, and the index value of the QoS corresponding to the TFT is flow1. And mapping the data packet of the uplink QoS flow1 to the DRB3. In this way, the user equipment can obtain the mapping relationship between the QoS flow1 and the DRB3 from the QoS flow1 to the DRB, and then change the mapping of the locally saved QoS flow1 to the DRB2, and update the QoS flow1 to the DRB3. The user equipment transmits the data packet of QoS flow1 on DRB3.
  • embodiments of the present application can be provided as a method, system, or computer program product.
  • the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware.
  • the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne, conformément à un mode de réalisation, un procédé d'échange d'informations entre des systèmes. Dans le procédé, la continuité de service lorsqu'un service d'un équipement d'utilisateur est transféré est assurée par l'échange d'informations en ce qui concerne une porteuse de service dans un système de communication sans fil dans une autre norme de communication qui correspond à un groupe de porteuses de service dans un système de communication sans fil dans une norme de communication, ou l'échange d'informations en ce qui concerne un groupe de porteuses de service dans un système de communication sans fil dans une autre norme de communication qui correspond à une porteuse de service dans un système de communication sans fil dans une norme de communication.
PCT/CN2018/071787 2017-01-06 2018-01-08 Procédé d'échange d'informations entre des systèmes, système de communication sans fil et équipement utilisateur WO2018127182A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BR112019013909A BR112019013909A2 (pt) 2017-01-06 2018-01-08 método, aparelho, meio e sistema de troca de informação inter-sistema
KR1020197022628A KR102232596B1 (ko) 2017-01-06 2018-01-08 시스템 간 정보 교환 방법, 무선 통신 시스템 및 사용자 장치
EP18735876.7A EP3567976B1 (fr) 2017-01-06 2018-01-08 Procédé d'échange d'informations entre des systèmes, dispositif de réseau central de plan utilisateur, système de communication sans fil et support de stockage lisible par ordinateur
JP2019536961A JP6974476B2 (ja) 2017-01-06 2018-01-08 システム間情報交換方法、ワイヤレス通信システム、およびユーザ機器
US16/502,756 US20190327658A1 (en) 2017-01-06 2019-07-03 Inter-system information exchange method, wireless communications system, and user equipment

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CN201710008627.5 2017-01-06
CN201710008627 2017-01-06
CN201710015171.5 2017-01-07
CN201710015171.5A CN108282320B (zh) 2017-01-06 2017-01-07 一种系统间信息交互方法，无线通信系统和用户设备

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