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WO2018103675A1 - Procédé et appareil de remappage de flux de données, équipement utilisateur et dispositif de réseau d'accès radio - Google Patents

Procédé et appareil de remappage de flux de données, équipement utilisateur et dispositif de réseau d'accès radio Download PDF

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Publication number
WO2018103675A1
WO2018103675A1 PCT/CN2017/114879 CN2017114879W WO2018103675A1 WO 2018103675 A1 WO2018103675 A1 WO 2018103675A1 CN 2017114879 W CN2017114879 W CN 2017114879W WO 2018103675 A1 WO2018103675 A1 WO 2018103675A1
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Prior art keywords
remapping
drb
data stream
information
data
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PCT/CN2017/114879
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English (en)
Chinese (zh)
Inventor
施小娟
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中兴通讯股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]

Definitions

  • the present disclosure relates to the field of wireless communication technologies, for example, to a data stream remapping method and apparatus, and a user equipment, a RAN device.
  • 5G systems will not be a single wireless access technology system, but can be used in combination including 4G further.
  • Evolved Long Term Evolution (eLTE) technology after evolution wireless local access network (WLAN) related technologies such as Wireless Local Area Network (WLAN) related technologies, adopting these different wireless access technologies
  • WLAN Wireless Local Area Network
  • the Radio Access Network (RAN) is connected to the unified 5G core network.
  • the above wireless access network adopting different radio access technologies accesses the unified 5G core network.
  • the 5G system needs to be “decoupled” to design the core network and the access network, that is, the core needs to be implemented.
  • the network and the access network can evolve independently without causing synchronization enhancement or change of the other side network due to enhancement or change of one side network.
  • An important issue in the decoupling design of the core network and the access network is how to meet the requirements of different services on the quality of service (QoS) in different scenarios.
  • QoS quality of service
  • FIG. 1 is a schematic diagram of a Qos architecture in LTE. As shown in Figure 1, the QoS architecture performs data in units of bearer granularity. For the transmission, FIG. 1 only shows a case where a PDN connection is established between a User Equipment (UE) and a Packet Data Network (PDN).
  • UE User Equipment
  • PDN Packet Data Network
  • the core network may establish multiple Evolved Packet System bearers (EPS bearers) between the UE and the PDN Gateway (P-GW).
  • EPS bearers Evolved Packet System bearers
  • the bearer can carry one or more service traffic flows (SDFs), and one or more SDFs carried on one EPS bearer have the same QoS.
  • SDFs service traffic flows
  • the EPS bearer is an end-to-end logical bearer between the UE and the P-GW.
  • the EPS bearer establishes three-segment bearers on the three network interfaces that the LTE network structure passes through, including establishing the P-GW and the serving gateway (Serving).
  • S-GW S5/S8bearer on the interface of the Gateway, S-GW), S1-bearer established on the interface between the S-GW and the base station (eNB), and a data radio bearer (Data Radio Bearer) established on the air interface between the eNB and the UE DRB), where S1-bearer and DRB are combined together and defined as an evolved Universal Terrestrial Radio Access Bearer (E-RAB) between the UE and the S-GW.
  • E-RAB evolved Universal Terrestrial Radio Access Bearer
  • the core network When the core network establishes an EPS bearer, it will notify the eNB of each E-RAB (ie, the EPS bearer is on the E-URTAN side).
  • the QoS parameter the eNB can only passively accept or reject. If accepted, the DRB between the UE and the UE is established on the air interface, and the data scheduling transmission is performed according to the received QoS parameters of the E-RAB level.
  • the QoS policy and parameters, and the mapping relationship between the SDF and the bearer are completely controlled by the core network, and the base station can only passively accept or refuse to establish the DRB.
  • the wireless interface is the key to implementing and satisfying QoS.
  • the base station cannot adjust the SDF mapped on each DRB according to the actual wireless load and the quality of the wireless link, so the most efficient execution cannot be performed.
  • QoS QoS.
  • the core network and the access network are too coupled, and the modification of the core network will directly affect the access network, so that the access network also needs to be modified correspondingly, and the independent expansion or evolution of the core network and the access network cannot be realized.
  • 3GPP proposes a flow-based QoS architecture in the 5G system design.
  • the bearer is removed between the core network and the radio access network, but the DRB is retained on the air interface.
  • Figure 2 shows a schematic diagram of a flow-based QoS architecture.
  • the 5G core network receives SDF (such as IP Flow) from a packet data network (such as the Internet), and maps the SDF into a QoS flow.
  • SDF such as IP Flow
  • the 5G core network generates a QoS rule according to the QoS policy of the core network, the QoS requirements of the SDF, and the subscription information of the user. And complete the mapping of SDF to QoS Flow.
  • the QoS rule includes a QoS profile and a precedence order of the QoS feature parameter, and may further include a packet filter or a data service filter of the SDF using the QoS feature parameter.
  • the QoS characteristic parameter may include a QoS ID for identifying or identifying the QoS characteristic parameter, and includes a Maximum Flow Bit Rate (MBR) and a Guaranteed Flow Bit Rate (GBR). ), at least one of a priority level, a Packet Delay Budget (PDB), a Packet Error Rate (PER), and an admission control (Admission control).
  • MLR Maximum Flow Bit Rate
  • GRR Guaranteed Flow Bit Rate
  • PDB Packet Delay Budget
  • PER Packet Error Rate
  • Admission control Admission control
  • the 5G core network sends the QoS characteristic parameters in the QoS rule generated by the decision to the RAN through a control plane interface with the RAN (such as a 5G base station or an eLTE base station, etc.), and the 5G core network passes the QoS interface with the RAN.
  • the Flow is sent to the RAN, so that the RAN maps the QoS Flow to the DRB, and performs subsequent data stream transmission based on the mapping relationship.
  • the present disclosure provides a data stream remapping method and apparatus, and a user equipment, a RAN device, which can implement remapping of a data stream on a DRB of an air interface in a flow-based QoS architecture.
  • the present disclosure provides a data stream remapping method, which may include:
  • the user equipment UE receives the data stream remapping information notified by the radio access network RAN device; the UE performs a data stream remapping operation according to the data stream remapping information.
  • the present disclosure also provides a data stream remapping apparatus, which may include:
  • a receiving module configured to receive data stream remapping information notified by the radio access network RAN device; and a remapping module configured to perform a data stream remapping operation according to the data stream remapping information.
  • the present disclosure also provides a user equipment, which may include one or more processors, a memory, and one or more programs, the one or more programs being stored in a memory, when executed by one or more processors, Perform the above method.
  • the present disclosure also provides a data stream remapping method, which may include:
  • the radio access network RAN device notifies the user equipment UE of the data stream remapping information; the RAN device performs a data stream remapping operation.
  • the notification module is configured to notify the user equipment UE data stream remapping information; the remapping module is configured to perform a data stream remapping operation.
  • the present disclosure also provides a radio access network RAN device, which may include one or more processors, a memory, and one or more programs, the one or more programs being stored in a memory when being processed by one or more processors When executed, perform the above method.
  • a radio access network RAN device which may include one or more processors, a memory, and one or more programs, the one or more programs being stored in a memory when being processed by one or more processors When executed, perform the above method.
  • the present disclosure also provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, when the program instructions are executed by a computer, Having the computer perform any of the methods described above.
  • the present disclosure provides a data stream remapping method and apparatus, and a user equipment and a RAN device, which receive data stream remapping information notified by the RAN device by the UE, so that the UE performs a data stream remapping operation according to the data stream remapping information, which can implement
  • the UE adjusts the mapping relationship between the data stream and the DRB used for transmitting the data stream to ensure the QoS of the data stream transmission and improve the user experience.
  • 1 is a QoS architecture diagram of an LTE system
  • FIG. 2 is a flow-based QoS architecture diagram of a 5G system
  • FIG. 3 is a schematic diagram of QoS flow re-mapping between different DRBs in a flow-based QoS architecture according to an embodiment
  • FIG. 4 is a schematic diagram of a data receiving sequence of a receiving end after data stream remapping according to an embodiment
  • FIG. 5 is a schematic flowchart of a data flow remapping method according to an embodiment
  • FIG. 6 is a schematic flowchart diagram of another data stream remapping method according to an embodiment
  • FIG. 7 is a schematic diagram of a remapping field format 1 provided by an embodiment
  • FIG. 8 is a schematic diagram of a remapping field format 2 provided by an embodiment
  • FIG. 9 is a schematic diagram of a remapping field format 3 provided by an embodiment
  • FIG. 10 is a schematic diagram of a remapping field format 4 provided by an embodiment
  • FIG. 11 is a schematic diagram of a user plane processing process of a sender and a receiver when data stream remapping is provided in an embodiment
  • FIG. 12 is a schematic structural diagram of a data stream remapping apparatus according to an embodiment
  • FIG. 13 is a schematic structural diagram of another data stream remapping apparatus according to an embodiment
  • FIG. 14 is a schematic structural diagram of hardware of a user equipment according to an embodiment
  • the core network refers to a core network device that completes multiple functions of the 5G core network, such as an integrated core network device that implements all core network functions, or functions such as implementing mobility management functions and session management of the core network.
  • the RAN refers to a RAN device that performs multiple functions of the 5G RAN, such as an integrated base station that performs all RAN functions, or a Base Band Unit (BBU) and a Radio Radio Unit (RRU).
  • BBU Base Band Unit
  • RRU Radio Radio Unit
  • the bearer is removed between the core network and the RAN, and the RAN combines the QoS characteristic parameters received from the core network or the QoS characteristic parameters received from the core network and the QoS ID in the data packet header. Determine the actual wireless load, wireless link quality and other factors, and establish a DRB.
  • the QoS rule is sent to the user equipment UE.
  • the QoS rule includes a QoS characteristic parameter and a priority of the QoS characteristic parameter, and may further include a packet filter or a data service filter using the QoS characteristic parameter.
  • This embodiment is convenient for description, and is hereinafter collectively referred to as a packet filter.
  • a shorthand is a PF packet filter.
  • a possible PF packet filter is Internet Protocol (IP) quintuple information including: source IP address, source port, destination IP address, destination port, and transport layer protocol.
  • IP Internet Protocol
  • the QoS flow may include at least one SDF.
  • a QoS flow including at least one SDF is referred to as a data flow.
  • Each data stream has a corresponding QoS rule.
  • the RAN determines, according to the QoS characteristic parameter received from the core network, the RAN decision to map the data stream to which DRB, and notifies the UE of the mapping result of the data stream and the DRB.
  • Each data stream has a corresponding QoS rule, and the QoS rule includes a QoS characteristic parameter and a priority of the QoS characteristic parameter, and may further include a PF packet filter using the QoS characteristic parameter. Therefore, the notification method for notifying the UE can be:
  • the UE If the QoS characteristic parameter information corresponding to the data flow can be identified by the QoS ID, the UE is notified of the QoS ID mapped on each DRB, that is, the QoS ID included in each DRB.
  • the UE matches the packet filter in the data packet received from the application layer (such as the IP layer) and the packet filter in the QoS rule received from the core network, and matches the packet corresponding to the packet.
  • the QoS characteristic parameter thereby determining the QoS ID, and then determining the DRB according to the determined QoS ID and the QoS ID mapped on each DRB received from the RAN side, and transmitting the data by using the determined DRB. or,
  • the notification mode may also be: notifying the UE of the packet filter mapped on each DRB, that is, the packet filter included in each DRB.
  • the UE determines the DRB according to the packet filter in the data packet received from the application layer (such as the IP layer) and the packet filter mapped on each received DRB, and uses the determination.
  • the DRB transmits data, wherein the UE may store the QoS ID information mapped on each DRB notified by the RAN or the packet filter information mapped on each DRB in the buffer of the UE.
  • the reflected mirror mapping can be used for services whose packet filters are not statically fixed, or for services that include many packet filters. For these services, the core network cannot send packet filters to the UE in the QoS rule (such as packet filtering). If the packet is not statically fixed, or the packet filter is sent to the UE in the QoS rule, a large amount of signaling overhead (such as a large number of packet filters) is introduced. In this manner, the UE may be notified by the control plane signaling or the user's breadhead to use the reflected mirrored uplink data.
  • the QoS rule such as packet filtering
  • the core network indicates the uplink data sent by using the reflection mirror mapping by using the QoS rule.
  • the indication information may be in the QoS characteristic parameter in the QoS rule.
  • the indication information may also be a parameter of the QoS rule with the QoS characteristic parameter, the priority of the QoS characteristic parameter, and the PF filter.
  • the UE receives the downlink data packet, matches the QoS characteristic parameter according to the QoS ID in the downlink data packet header, and finally matches the QoS rule. If the QoS rule indicates that the reflected mirror mapping is used, the UE saves the packet filter in the downlink data packet. Go to the QoS rule.
  • the UE When the UE has uplink data transmission, the UE matches the packet filter in the uplink data packet with the packet filter in the QoS rule, matches the QoS rule using the reflection mirror mapping, and uses the DRB that receives the downlink data packet. To send upstream data.
  • the core network or RAN When notified by the user's breadhead, the core network or RAN indicates the uplink data transmitted using the reflected mirror map in the header of the downlink packet sent to the UE.
  • the UE receives the downlink data packet, and matches the QoS characteristic parameter according to the QoS ID in the packet header of the downlink data packet and the QoS rule received from the core network, and Save the packet filter in the downstream packet to the QoS rule.
  • the UE matches the packet filter in the uplink data packet with the packet filter in the QoS rule, matches the QoS rule using the reflection mirror mapping, and uses the DRB that receives the downlink data packet. To send upstream data.
  • the RAN decides how to establish a DRB and how to map packets onto each DRB.
  • the QoS flow originally mapped to a DRB needs to be mapped to the QoS flow changed by the service, or the QoS rule determined by the core network decision, or the RAN radio channel condition, the radio load change, or the RAN decision change, or the RAN handover.
  • Another DRB Another DRB.
  • QoS flow1 is originally mapped to DRB1, and data transmission is performed on DRB1.
  • QoS flow1 is remapped to DRB2 for transmission.
  • This embodiment can implement remapping of QoS flows between DRBs, implement remapping of data flows between different DRBs, ensure QoS of data flows, and ensure user experience.
  • the cache state of DRB1 for buffering application layer data packets is as shown in FIG. 3, where IP-PDU1 and IP-PDU3 has completed transmission on DRB1 and received acknowledgment information from the peer (UE) for successful reception, while IP-PDU2 has sent but has not received acknowledgment from the peer to successfully receive, and IP-PDU4 has not been sent.
  • IP-PDU1 and IP-PDU3 has completed transmission on DRB1 and received acknowledgment information from the peer (UE) for successful reception
  • IP-PDU2 has sent but has not received acknowledgment from the peer to successfully receive
  • IP-PDU4 has not been sent.
  • QoS flow1 is remapped from DRB1 to DRB2
  • subsequent IP PDUs from QoS flow1 of the core network will be placed in the DRB2 cache, as shown in IP-PDU5 and IP-PDU6.
  • the QoS flow remapping case shown in FIG. 3 can be applied to remapping within the same RAN device, and can also be
  • IP-PDU 5 and IP-PDU 6 transmitted by QoS flow1 on DRB2 may arrive first than the IP-PDU 2 and IP-PDU 4 legacy on DRB1, as shown in Figure 4, the order of receiving these packets is received by the receiving end. May be IP-PDU5, IP-PDU6, IP-PDU2 and IP-PDU4.
  • the receiving end receives an out-of-order packet, which may cause the transmitting end to downgrade the transmission rate and affect the throughput. Affect QoS and the user's business experience.
  • TCP Transmission Control Protocol
  • FIG. 5 is a flowchart of a data flow remapping method provided by Embodiment 1, and includes the following steps:
  • step 510 the RAN makes a data flow remapping decision
  • QoS flow1 and QoS flow2 are mapped to DRB1
  • QoS flow3 is mapped to DRB2
  • QoS flow4 and QoS flow5 are mapped to DRB3.
  • the RAN makes a data flow remapping decision and maps QoS flow1 from the original DRB1 to DRB2.
  • step 520 the RAN informs the UE of the data stream remapping information by control plane signaling.
  • the UE receives the data stream remapping information that is notified by the RAN device, and enables the UE to perform the data stream remapping operation according to the data stream remapping information, so that the UE can adjust the data stream mapping relationship used for transmitting the data stream to ensure the data stream transmission. QoS to enhance the user experience.
  • the RAN notifies the data flow remapping information by control plane signaling, which may be one of the following ways:
  • Manner 1 Instruct the UE to delete information of data flow information mapped to the DRB; where the data flow information may be identified by a QoS ID or a packet filter;
  • the remapping information is used to instruct the UE to delete the QoS ID mapped to the DRB.
  • the RAN informs the UE to delete the mapped QoS ID1 from DRB1; or
  • the remapping information may be used to indicate that the UE deletes the mapping to the DRB. Packet filter on. Taking the example shown in FIG. 3 as an example, if the packet filters corresponding to QoS flow1 are PF1 and PF2, in this step, the RAN notifies the UE to delete the mapped PF1 and PF2 from DRB1.
  • the data flow information is identified by a QoS ID.
  • QoS flow1 corresponds to QoS ID1.
  • the UE side may store a mapping relationship between each DRB and data flow information.
  • the mapping relationship includes: mapping QoS ID1 on DRB1 and QoS ID2.
  • RAN remapping decision maps QoS flow1 On the DRB2, the UE is notified by the data stream remapping information, so that the UE deletes the QoS ID1 in the mapping relationship between the DRB1 and the QoS ID, and adds the QoS ID1 in the mapping relationship between the DRB2 and the QoS ID.
  • the mode 1 is applicable to the case where the DRB is used for downlink transmission.
  • the RAN clearly knows the mapping relationship between each QoS flow and the DRB. Therefore, the UE only needs to notify the UE to delete the mapped QoS flow information from the DRB. Used when the UE side performs user plane data stream remapping processing.
  • Manner 2 Instruct the UE to update information that is mapped to data flow information on the DRB.
  • the UE is instructed to update the mapped data flow information to update the QoS ID mapped to the DRB.
  • the QoS IDs corresponding to QoS flow 1 to QoS flow 5 are QoS ID 1 to QoS ID 5
  • the data flow information mapped to the DRB in this step may be:
  • DRB2 QoS ID1, QoS ID3,
  • DRB3 QoS ID4, QoSID5,
  • the updated data stream information may also be an update to the packet filter on the DRB.
  • the packet filters corresponding to QoS flow1 are PF1 and PF2
  • the packet filters corresponding to QoS flow2 are PF3, PF4, and PF5, and QoS flow3, QoS flow4, and QoS flow5 respectively correspond to the packets.
  • the filters PF6, PF7, and PF8 update the data stream information mapped to the DRB.
  • DRB3 PF7, PF8.
  • the UE side may store the data flow information mapped on each DRB before the remapping, and the RAN notifies the UE data flow remapping information through the control plane signaling, so that the UE may delete or update the UE side storage according to the data flow remapping information.
  • the data stream information mapped on the adjusted DRB may also be updated with the data stream information mapped on all DRBs.
  • the UE maps all DRBs stored on the UE side according to the data stream remapping information notified by the RAN. The data stream information is replaced as a whole.
  • the second mode is applicable to the case where the DRB is used for downlink and/or uplink data transmission, and the notification information is used when the UE side performs user plane data stream remapping processing.
  • FIG. 6 is a flowchart of a data stream remapping method used in Embodiment 2, including the following steps:
  • step 610 the RAN makes a data flow remapping decision
  • This step is the same as the description of step 510 above.
  • the RAN informs the UE of the data stream remapping information by the header information of the user plane data packet.
  • a remap-infor field is added in the header of the user plane data packet, and the field is used to notify the receiving end whether the data packet is remapped.
  • the remapping fields can have different formats and can be any of the following formats:
  • the remapping field may include a Remap Exist (RE) bit (ie, a first indication bit) and a Remap Information (RMI) bit (ie, a first remapping information bit).
  • RE Remap Exist
  • RMI Remap Information
  • the remapping field includes a remapping information presence indication (RE) bit and a remapping information (RMI) bit, and the RE and the RMI each occupy one bit. among them:
  • RE indicates the presence or absence of the RMI. For example, a value of 1 for the RE indicates that the RMI exists, and a value of 0 indicates that the RMI does not exist.
  • RMI Indicates whether the data stream is remapped. For example, an RMI value of 1 indicates that the data stream is remapped, and a value of 0 indicates that the data stream is not remapped.
  • QoS flow1 is remapped from DRB1 to DRB2.
  • the remapping field may include a remapping information presence indication (RE) bit (ie, a second indication bit) and a remapping DRB information (RM-DRB) (ie, a first remapping DRB information);
  • RE remapping information presence indication
  • RM-DRB remapping DRB information
  • the remapping field may include an RE and an RM-DRB, where the RE occupies one bit, and how many bits the RM-DRB occupies depends on the length of the DRM identifier (DRB-ID), for example, the length of the DRB-ID in the LTE is 5bit, but the length of the DRB-ID in 5G may be larger than 5bit.
  • DRM-ID DRM identifier
  • RE indicates the presence or absence of RM-DRB. For example, a value of 1 for the RE indicates that RM-DRB exists, and a value of 0 indicates that RM-DRB does not exist.
  • RM-DRB Information indicating the source DRB when the data stream is remapped, that is, information indicating that the data stream is remapped to the source DRB before the current DRB, wherein the information of the DRB may be a DRB-ID.
  • QoS flow1 is remapped from DRB1 to DRB2, assuming that the DRB-ID of DRB1 is 1, and the DRB-ID of DRB2 is 2, and the QoS flow1 is remapped to DRB2 for a period of time.
  • a period of time and "designated data packet” will be explained in the subsequent embodiments.
  • the REs in the header of these packets are set to zero.
  • the remapping field may include a Remapping Information Bit (RMI) (ie, a second remapping information bit), and the remapping information bit may be used to indicate whether the data stream is remapped;
  • RMI Remapping Information Bit
  • the RMI of format 3 always exists to indicate whether the data stream is remapped. For example, a value of 1 for RMI indicates that the data stream is remapped, and a value of 0 indicates that the data stream is not heavy.
  • RMI the RMI in these packet headers is set to zero.
  • the remapping field may include remapping DRB information (RM-DRB) (ie, second remapping DRB information), and the remapping DRB information may be used to indicate information of the source DRB when the data stream is remapped;
  • RM-DRB remapping DRB information
  • the RM-DRB of format 4 is always present, indicating information of the source DRB when the data stream is remapped, that is, the data stream is remapped to the source DRB before the current DRB. information.
  • QoS flow1 is remapped from DRB1 to DRB2, assuming that the DRB-ID of DRB1 is 1, and the DRB-ID of DRB2 is 2, and the QoS flow1 is remapped to DRB2 for a period of time.
  • the remapping field is set in the header of the QoS flow1 packet sent on the DRB2 or in the header of the specified packet on the QoS flow1, so that the notification receiving end data stream QoS flow1 is remapped from DRB1 to DRB2.
  • the RAN sets a remapping field according to the format 1 or the format 3 in the header of the downlink data packet sent to the UE.
  • the eNB may determine that the downlink data packet is heavy.
  • the mapped data packet is further transmitted according to the mapping manner of the data packet, such as the reflection mirror mapping mode, by using the DRB that receives the downlink data packet to transmit the corresponding uplink data.
  • the RAN sets a remapping field according to the format 2 or the format 4 in the header of the downlink data packet sent to the UE.
  • the eNB may determine that the downlink data packet is Re-mapping the data packet, and obtaining information that the data stream is re-mapped to the source DRB before the current DRB, and may be based on the remapping field if the UE side receives the duplicate data packet from the source DRB and the current DRB. Perform subsequent operations to drop packets, and so on.
  • the packet header length of the data packet is determined according to the actual application of the 5G system.
  • the figure is exemplified by two bytes, which is only an example. The embodiment does not limit the actual data.
  • the length of the packet header is also an example, and does not limit the location of the remapping field actually in the packet header.
  • the user plane protocol stack on the 5G radio interface can adopt the protocol stack architecture on the LTE radio interface, and can include Medium Access Control (MAC) and Radio Link Control (RLC) from bottom to top.
  • the protocol layer such as the Packet Data Convergence Protocol (PDCP) may be modified based on the LTE radio interface protocol stack. For example, a new protocol layer is added on the PDCP. This embodiment can be called It is the L2-new protocol layer.
  • PDCP Packet Data Convergence Protocol
  • a remapping field is added to the header of the user plane data packet, where the header of the user plane data packet may refer to a header of a PDCP PDU generated by the PDCP, or may be a header of a PDU generated by L2-new.
  • the manner in which the UE data stream remapping is notified by the packet header information of the user plane data packet can be applied to The case where the DRB is used for downlink and/or uplink transmission, and the notification information is used when the UE side performs the user plane data stream remapping process, for example, in the case of informing the UE to use the reflected mirror mapping manner to perform the uplink data flow and the DRB mapping relationship. ,.
  • QoS flow1 is remapped from DRB1 to DRB2.
  • DRB1 there may be packets left on QoS flow1 on DRB1, such as IP-PDU2 and IP-PDU4 in Figure 3.
  • the new data packet on the QoS flow1 is started to be transmitted, for example, the IP-PDU5 and the IP-PDU6 in the figure.
  • the UE can receive the DRB1 and the DRB1.
  • the data packet of the QoS flow1 of the DRB2 is such that the UE cannot determine which DRB the uplink data packet is mapped to.
  • the remapping can be performed according to the remapping. If the setting of the field determines that QoS flow1 has been mapped from DRB1 to DRB2, the downlink data packet received on DRB2 is used to reflect the transmission of the uplink data packet, that is, the uplink data packet is mapped to the DRB2 for transmission.
  • the third embodiment provides a processing process of the user plane when the data stream is remapped.
  • Figure 11 shows the processing of the user plane when the data stream is remapped between the sender and the receiver.
  • the sender sequentially migrates the legacy packet of QoS flow1 in the transmission buffer of DRB1 (source DRB) to the buffer of the transmission (target DRB) of DRB2. If the sending end is the UE, the sending buffer of the source DRB and the sending buffer of the target DRB are both caches of the UE side. If the sending end is the RAN, the sending buffer of the source DRB and the sending buffer of the target DRB are both RAN side. Cache.
  • the legacy data packet of the QoS flow1 in the transmission buffer of the DRB1 refers to all the data packets starting from the first data packet that has not been successfully received by the receiving end in the transmission buffer of the source DRB.
  • these packets may be packets of QoS flow1 from the application layer (such as the IP layer), such as IP PDUs.
  • the application layer such as the IP layer
  • IP PDUs IP protocol protocol
  • the radio interface user plane protocol if the 5G user plane protocol follows the LTE protocol stack architecture, including MAC, RLC and PDCP, these data packets may be Service Data Units (PDCP SDUs), if 5G The user plane protocol has been redesigned to include L2-new on top of PDCP. At the protocol layer, these packets can be L2-new SDUs.
  • the data packet migrated from the transmission buffer of DRB1 to the transmission buffer of DRB2 may include IP-PDU2 and IP-PDU4.
  • the transmission buffer of DRB2 is as shown in FIG. IP-PDU2 and IP-PDU4 migrated from DRB1, and new data IP-PDU5 and IP-PDU6 on QoS flow1 on DRB2.
  • packets migrated from DRB1 are preferentially transmitted.
  • the data packet that is migrated from the transmission buffer of the DRB1 to the transmission buffer of the DRB2 can be placed in front of the buffer queue, and the data packet migrated from the DRB1 is preferentially transmitted according to the principle of the advanced buffer.
  • the data packet migrated from the transmission buffer of the DRB1 to the transmission buffer of the DRB2 may be identified, and the identified data packet may be preferentially transmitted, so that when the data is transmitted on the DRB2, the data packet migrated from the DRB1 is preferentially transmitted.
  • the foregoing transmitting end is the RAN.
  • the RAN may Perform the above packet migration process.
  • the transmitting end is the UE.
  • the UE may perform the above data packet migration process based on the first embodiment or the second embodiment.
  • the UE receives the data stream remapping information through the control plane signaling; or, when the mapping between the uplink data stream and the DRB adopts the reflection mirror mapping mode, the UE may receive the downlink data packet on the target DRB, according to The remapping field in the header of the downlink data packet learns the data stream remapping information.
  • the QoS flow1 is remapped from the DRB1 to the DRB2, and the remapping field in the data packet header is set according to the method in the second embodiment for a period of time when the transmitting end starts to send the data packet of the QoS flow1 on the DRB2.
  • the period of time can be determined by the sender.
  • the sender can judge that the legacy data packet of QoS flow1 on DRB1 has been sent, or send
  • the remapping field in the data packet header is set according to the method described in Embodiment 2, and the "specified data packet" can be determined by the transmitting end. For example, it can be a legacy packet migrated from DRB1.
  • the user plane processing of the above sender is applicable to the remapping of the data stream in the same RAN device, and can also be used when switching from one RAN device to another when switching or multi-connection.
  • Mapping for the latter, the packet migration process can be done through an interface between the source RAN device and the target RAN device.
  • the receiving end may not perform any special processing. As shown in FIG. 11, the receiving end may choose to discard the data packet of QoS flow1 received from DRB1 (source DRB).
  • the receiving end may be the UE.
  • the UE After receiving the data stream remapping information from the RAN, the UE performs the discarding operation according to the first embodiment or the second embodiment. Receiving, by the UE, the data stream remapping information by using control plane signaling; or, the UE receives the downlink data packet on the target DRB, where the remapping field in the packet header of the downlink data packet indicates the data stream remapping information .
  • the receiving end may be a RAN.
  • the RAN makes a data flow remapping decision based on the first embodiment or the second embodiment, or the RAN receives an uplink data packet on the target DRB, the uplink data packet
  • the remapping field in the header indicates the data stream remapping information.
  • FIG. 12 is a schematic diagram of a data stream remapping apparatus according to an embodiment of the present invention. As shown in FIG. 12, a data stream remapping apparatus 120 of this embodiment may include:
  • the receiving module 121 is configured to receive data flow remapping information notified by the radio access network RAN device;
  • the remapping module 122 is configured to perform a data stream remapping operation based on the data stream remapping information.
  • the data stream remapping apparatus 120 of this embodiment can implement remapping of data streams between different DRBs, can ensure QoS of data streams, and improve user experience.
  • the receiving module 121 is configured to receive data stream remapping information that is sent by the RAN device by using a control plane signaling, where the data stream remapping information is one of: indicating that the UE deletes the mapping to the DRB.
  • Information of the data stream information; instructing the UE to update information mapped to data stream information on the DRB; the data stream information may be identified by a quality of service identifier QoS ID or a packet filter.
  • deleting the mapped data flow information from the DRB is deleting the QoS ID mapped to the DRB, and the updated mapped data flow information is updated to be mapped to the DRB.
  • the data stream information of the deleted mapping is deleted to be mapped to a packet filter on the DRB, and the updated data stream information of the mapping is updated to a packet filter mapped to the DRB.
  • the receiving module 121 is configured to receive data stream remapping information that is notified by the RAN device by a packet header of the user plane data packet; the data stream remapping information is included in a remapping field of a packet header of the data packet. in.
  • the remapping field includes any one of the following formats: format 1: the remapping field includes a first indication bit and a first remapping information bit, where the first indication bit is used to indicate the first Whether a remapping information bit exists; the first remapping information bit is used to indicate whether the data stream is remapping; and the format 2: the remapping field includes a second indication bit and a first remapping DRB information, where The second indication bit is used to indicate whether the first remapping DRB information exists; the first remapping DRB information is used to indicate information of a source DRB when the data stream is remapped; format 3: the remapping field A second remapping information bit is included, the second remapping information bit is used to indicate whether the data stream is remapped; format 4: the remapping field includes second remapping DRB information, and the second remapping DRB information Information Information
  • the remapping module 122 is further configured to: sequentially migrate the legacy data packet in the transmit buffer of the source DRB to the transmit buffer of the target DRB, where the source DRB is the The remapped data stream is remapped to the DRB, the target DRB is the DRB after the remapped data stream is remapped, and the remapped data stream is remapped from the source DRB The target DRB.
  • the legacy data packet in the sending buffer of the source DRB includes:
  • the remapping module 122 is further configured to: when the UE sends the data packet of the remapping data stream on the target DRB, the data packet in the remapping data stream is specified. Setting a data stream remapping field in the header of the packet; or, when the UE sends the data packet of the remapping data stream on the target DRB, setting the data stream remapping field in a packet header of the specified data packet
  • the specified time period and the specified data packet are used by the data stream remapping device 120 Determine by yourself.
  • the remapping module 122 is further configured to: when the UE transmits an uplink data packet of the data flow by using a reflective mirror mapping manner, the UE receives a downlink data packet of the data flow on the target DRB, and the When the data stream remapping information is included in the header of the downlink data packet, the UE maps the uplink data packet of the data stream to the target DRB that receives the downlink data packet.
  • the embodiment further provides a user equipment, which may include a memory 1420 and one or more processors 1410.
  • a user equipment which may include a memory 1420 and one or more processors 1410.
  • One processor 1410 is taken as an example in FIG. among them,
  • the memory 1420 stores the following instructions: receiving data stream remapping information notified by the radio access network RAN device, and performing a data stream remapping operation according to the data stream remapping information;
  • the processor 1410 is configured to execute the instructions stored by the memory.
  • the data stream remapping information that is notified by the RAN device by the control plane signaling is received, where the data stream remapping information is one of: indicating that the UE deletes information that is mapped to the data stream information on the DRB. Instructing the UE to update information mapped to data flow information on the DRB.
  • the data flow information is identified by a QoS ID or a packet filter.
  • the deleting the data flow information mapped to the DRB is deleting the QoS ID mapped to the DRB, and the update is mapped to the data on the DRB.
  • the flow information is an update mapping to a QoS ID on the DRB;
  • the deleting the data flow information mapped to the DRB is deleting a packet filter mapped to the DRB, and the update is mapped to the DRB.
  • the data stream information is updated to the packet filter on the DRB.
  • the data stream remapping information is received by the RAN device through a packet header of the user plane data packet; wherein the data stream remapping information is included in a remapping field of a packet header of the user plane data packet.
  • the remapping field includes any one of the following formats: format 1: the remapping field includes a first indicator bit and a first remapping information bit, where the first indicator bit is used to indicate the first weight Whether the mapping information bit exists; the first remapping information bit is used to indicate whether the data stream is Re-mapping; format 2: the remapping field includes a second indication bit and a first remapping DRB information, where the second indication bit is used to indicate whether the first remapping DRB information exists; The remapping DRB information is used to indicate information of the source DRB when the data stream is remapped; format 3: the remapping field includes a second remapping information bit, and the second remapping information bit is used to indicate whether the data stream is Remapping; Format 4: The remapping field includes second remapping DRB information, and the second remapping DRB information is used to indicate information of the source DRB when
  • performing a data stream remapping operation according to the data stream remapping information including: sequentially migrating the remapping data stream in a sending buffer of the source DRB to a sending buffer of the target DRB, where The source DRB is a DRB before the remapping data stream is remapped, and the target DRB is a DRB after the remapping data stream is remapped, and the remapping data stream is from The source DRB is remapped to the target DRB
  • the legacy data packet in the sending buffer of the source DRB includes:
  • the performing a data stream remapping operation according to the data stream remapping information further comprising: transmitting, during the specified time period of the data packet of the remapping data stream on the target DRB, in the Setting a data stream remapping field in a header of the data packet of the remapped data stream; or setting the data packet in the header of the specified data packet when transmitting the data packet of the remapping data stream on the target DRB Data stream remapping fields.
  • the specified time period and the specified data packet are determined by the user equipment
  • the performing the data stream remapping operation according to the data stream remapping information further includes: when the reflected image mapping manner transmits the uplink data packet of the data stream, the UE receives the data stream on the target DRB.
  • the downlink data packet includes the data flow remapping information in the header of the downlink data packet, the UE maps an uplink data packet of the data flow to the target DRB that receives the downlink data packet.
  • the performing the data stream remapping operation according to the data stream remapping information further includes: discarding the data packet of the remapping data stream received from the source DRB, where the source DRB is the The data stream is remapped to the previous DRB, and the remapping data stream is remapped from the source DRB to the target DRB.
  • the user equipment may further include: an input device 1430 and an output device 1440.
  • the processor 1410, the memory 1420, the input device 1430, and the output device 1440 in the electronic device may be connected by a bus or other means, and the bus connection is taken as an example in FIG.
  • Input device 1430 can receive input numeric or character information
  • output device 1440 can include a display device such as a display screen.
  • the memory 1420 is a computer readable storage medium that can be used to store software programs, computer executable programs, and modules.
  • the processor 1410 performs various functional applications and data processing by executing software programs, instructions, and modules stored in the memory 1420 to implement any of the above-described embodiments.
  • Input device 1430 can be used to receive input numeric or character information and to generate key signal inputs related to user settings and function controls of the electronic device.
  • the output device 1440 can include a display device such as a display screen.
  • the electronic device of the present embodiment may also include a communication device 1450 for transmitting and/or receiving information over a communication network.
  • FIG. 13 is a schematic diagram of a data stream remapping apparatus according to the embodiment. As shown in FIG. 13, the data stream remapping apparatus 130 of this embodiment includes:
  • the remapping module 132 is configured to perform a data stream remapping operation.
  • the data stream remapping apparatus 130 of this embodiment can implement remapping of data streams between different DRBs, ensure QoS of data streams, and improve user experience.
  • the notification module 131 is configured to notify the UE of the data flow remapping information by using control plane signaling, where the data flow remapping information is one of: indicating that the UE deletes the mapping to the Information about data flow information on the DRB; indicating that the UE updates information mapped to data flow information on the DRB.
  • the data flow information is identified by a quality of service identifier QoS label or a packet filter.
  • the deleting the data flow information mapped to the DRB is a QoS ID mapped from the deletion to the DRB;
  • the update is mapped to the DRB The data stream information on the update is mapped to the QoS ID on the DRB;
  • the deleting the data stream information mapped to the DRB is deleting a packet filter mapped to the DRB; and the updating is mapped to the data on the DRB.
  • the flow information is an update mapping to a packet filter on the DRB.
  • the remapping field includes any one of the following formats: format 1: the remapping field includes a first indication bit and a first remapping information bit, where the first indication bit is used to indicate the first Whether a remapping information bit exists; the first remapping information bit is used to indicate whether the data stream is remapping; and the format 2: the remapping field includes a second indication bit and a first remapping DRB information, wherein the The second indicator bit is used to indicate whether the first remapping DRB information exists; the first remapping DRB information is used to indicate information of a source DRB when the data stream is remapping; and the format 3: the remapping field includes Binding information bits, the second remapping information bits are used to indicate whether the data stream is remapped; format 4: the remapping field includes second remapping DRB information, and the second remapping DRB information is
  • the remapping module 132 is configured to sequentially migrate the legacy data packet in the transmit buffer of the source DRB to the transmit buffer of the target DRB, where the source DRB is the The mapped data stream is remapped to the DRB, the target DRB is the DRB after the remapped data stream is remapped, and the remapped data stream is remapped from the source DRB to the Target DRB.
  • the legacy data packet in the transmission buffer of the source DRB includes: in the transmission buffer of the source DRB, all data packets starting from the first data packet that has not been successfully received by the UE.
  • the data packet migration operation may be transmitted through an interface between the different RAN devices.
  • the remapping module 132 is further configured to: in the specified time period of sending the data packet of the remapping data stream on the target DRB, in a packet header of the data packet of the remapping data stream Setting a data stream remap field; or, when transmitting the data packet of the remapping data stream on the target DRB, setting the data stream remapping in a header of the specified data packet of the remapping data stream Field.
  • the specified time period and the specified data packet are determined by the data stream remapping device 130.
  • the remapping module 132 is further configured to: discard the data packet of the remapping data stream received from the source DRB, wherein the source DRB is a DRB before the data stream is remapped, the The remapping data stream is remapped from the source DRB to the target DRB.
  • the memory 1520 stores the following instructions: notifying the user equipment UE data stream remapping information; performing a data stream remapping operation;
  • the processor 1510 is configured to execute the instruction stored by the memory.
  • the data flow remapping information is one of: instructing the UE to delete data flow information mapped to the DRB.
  • the data flow information is identified by a QoS ID or a packet filter.
  • the data flow information mapped to the DRB is a QoS ID mapped from the delete to the DRB; and the update is mapped to the data flow on the DRB.
  • the information is an update mapped to the QoS ID on the DRB; when the data flow information is identified by the packet filter, the deleting the data flow information mapped to the DRB is deleting the packet filter mapped to the DRB
  • the update maps the data stream information mapped to the DRB to a packet filter that is mapped to the DRB.
  • the data stream remapping information is included in a remapping field of a packet header of the data packet.
  • the remapping field includes any one of the following formats: format 1: the remapping field includes a first indicator bit and a first remapping information bit, where the first indicator bit is used to indicate the first weight Whether the mapping information bit exists; the first remapping information bit is used to indicate whether the data stream is remapped; the format 2: the remapping field includes a second indication bit and a first remapping DRB information, wherein the second indication a bit is used to indicate whether the first remapping DRB information exists; the first remapping DRB information is used to indicate information of a source DRB when the data stream is remapping; and format 3: the remapping field includes a second weight Mapping information bits, the second remapping information bit is used to indicate whether the data stream is remapped; format 4: the remapping field includes second remapping DRB information, and the second remapping DRB information is used to indicate data The information
  • the performing a data stream remapping operation includes: sequentially migrating the legacy data packet in the sending buffer of the source DRB to the sending buffer of the target DRB, where the source is a DRB is a DRB before the remapping data stream is remapped, the target DRB is a DRB after the remapping data stream is remapped, and the remapping data stream is from the source The DRB is remapped to the target DRB.
  • the legacy data packet in the sending buffer of the source DRB includes: in the sending buffer of the source DRB, all the data packets starting from the first data packet that has not been successfully received by the UE. .
  • the data packet migration operation may be performed by using an interface between the different RAN devices, if the transmission buffer of the source DRB and the transmission buffer of the target DRB belong to different RAN devices.
  • the performing a data stream remapping operation further includes: transmitting, at the target DRB, a data packet of the remapping data stream within a specified time period of sending the data packet of the remapping data stream Setting a data stream recasting field in the header of the packet; or, when transmitting the data packet of the remapping data stream on the target DRB, setting the data in a header of the specified data packet of the remapping data stream Flow remaps the field.
  • the performing a data stream remapping operation further includes: discarding a data packet of the remapping data stream received from the source DRB, where the source DRB is a DRB before the data stream is remapped.
  • the remapping data stream is remapped from the source DRB to the target DRB.
  • the RAN device may further include a communications interface 1530 and a bus 1540.
  • the processor 1510, the memory 1520, and the communication interface 1530 can complete communication with each other through the bus 1540.
  • Communication interface 1530 can be used for information transfer.
  • the processor 1510 can call the logic instructions in the memory 1520 to perform any of the methods of the above embodiments.
  • the logic instructions in the memory 1420 and the memory 1520 in the above embodiments can all be implemented in the form of software functional units and sold or used as separate products, the logic instructions can be stored in a computer readable storage medium.
  • the technical content of this embodiment may be embodied in the form of a computer software product, which may be stored in a storage medium, and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) Performing all or part of the steps of the method described in this embodiment.
  • the non-transitory storage medium may be a temporary storage medium, and the non-transitory storage medium may include, but not limited to, a USB flash drive and a read-only memory (ROM). Any medium that can store program code, such as random access memory (RAM), mobile hard disk, disk, or optical disk.
  • RAM random access memory
  • disk disk
  • optical disk any medium that can store program code, such as random access memory (RAM), mobile hard disk, disk, or optical disk.
  • the solution of this embodiment can implement a flow-based QoS architecture, and how to connect the data stream in the air. Transmission on the interface, especially how the data stream is remapped on the DRB of the air interface.
  • All or part of the above steps may be performed by a program to instruct related hardware (eg, a processor), which may be stored in a computer readable storage medium such as a read only memory, a magnetic disk, or an optical disk.
  • a program to instruct related hardware eg, a processor
  • a computer readable storage medium such as a read only memory, a magnetic disk, or an optical disk.
  • all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits.
  • each module/unit in the foregoing embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, being executed by a processor and stored in a memory. Programs/instructions to implement their respective functions.
  • the present disclosure is not limited to any specific form of combination of hardware and software.

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Abstract

L'invention concerne un procédé et un appareil de remappage de flux de données, un équipement utilisateur et un dispositif de réseau d'accès radio (RAN). Le procédé comprend les étapes suivantes : un équipement utilisateur (UE) reçoit des informations de remappage de flux de données notifiées par un dispositif de RAN ; et l'UE exécute une opération de remappage de flux de données selon les informations de remappage de flux de données.
PCT/CN2017/114879 2016-12-06 2017-12-06 Procédé et appareil de remappage de flux de données, équipement utilisateur et dispositif de réseau d'accès radio WO2018103675A1 (fr)

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