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WO2008049369A1 - Procédé pour envoyer un service de multidiffusion et de diffusion générale sur une liaison descendante et système et station de base correspondants - Google Patents

Procédé pour envoyer un service de multidiffusion et de diffusion générale sur une liaison descendante et système et station de base correspondants Download PDF

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Publication number
WO2008049369A1
WO2008049369A1 PCT/CN2007/070920 CN2007070920W WO2008049369A1 WO 2008049369 A1 WO2008049369 A1 WO 2008049369A1 CN 2007070920 W CN2007070920 W CN 2007070920W WO 2008049369 A1 WO2008049369 A1 WO 2008049369A1
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WIPO (PCT)
Prior art keywords
service
logical channel
base station
mac pdu
mbs
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PCT/CN2007/070920
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English (en)
Chinese (zh)
Inventor
Wenliang Liang
Jianjun Wu
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Huawei Technologies Co., Ltd.
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Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008049369A1 publication Critical patent/WO2008049369A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services

Definitions

  • Multicast broadcast service downlink transmission method and system thereof base station
  • the application is submitted to the Chinese Patent Office on October 18, 2006, the application number is 200610142601.1, and the invention name is "multicast broadcast service downlink transmission method and system thereof, China" Priority of the patent application, the entire contents of which are incorporated herein by reference.
  • the present invention relates to the field of wireless communications, and in particular, to a Multicast Broadcast Service (MBS) technology.
  • MMS Multicast Broadcast Service
  • IEEE 802.16 was issued by the Institute of Electrical and Electronics Engineers (' ⁇ ') in December 2001 to provide the last mile of wireless broadband access in metropolitan area networks.
  • WiMAX Worldwide Interoperability for Microwave Access
  • WiMAX is the industry's wireless metropolitan area network access technology based on the IEEE 802.16 series of standards. Its basic goal is to provide a point-to-multipoint network in the metropolitan area network. Broadband wireless access means that can interoperate effectively in a multi-vendor environment.
  • the 802.16 series of standards specifies the protocol layer of the air interface part of the WiMAX system, including the physical layer (PHY) and the Medium Access Control (MAC) layer.
  • the PHY layer physically performs modulation, demodulation, and codec operations on the signal
  • the MAC layer mainly implements the media access control function of the WiMAX system.
  • FIG. 1 shows the WiMAX end-to-end reference model.
  • the R1 interface is a wireless air interface and is mainly defined by IEEE802.16d/e.
  • the remaining interfaces are all wired interfaces.
  • WiMAX mainly includes mobile station (Mobile Station, referred to as "MS”) / user Subscriber (“Sc,”), Access Service Network (“ASN”) and Connectivity Service Network (“CSN”).
  • MS Mobile Station
  • Sc user Subscriber
  • ASN Access Service Network
  • CSN Connectivity Service Network
  • the ASN is defined as a set of network functions that provide wireless access services for WiMAX user terminals.
  • the ASN includes BS and ASN GateWay ("ASN-GW”) network elements, and an ASN may be shared by multiple CSNs.
  • ASN-GW ASN GateWay
  • the main functions of the ASN include the functions of the BS and the functions of the ASN-GW.
  • the functions of the BS are: providing L2 connection between the BS and the subscriber station SS/MS, radio resource management, measurement and power control, and compression and encryption of air interface (ie, air interface) data.
  • the functions of ASN-GW include: providing proxy function for SS/MS authentication, authorization, and accounting functions; supporting network discovery and selection of Network Service Provider (NSP); providing L3 for SS Relay function of information, such as IP address allocation.
  • the CSN provides IP connection services for WiMAX user terminals.
  • the CSN mainly provides the following functions: IP address allocation of SS/MS, Internet access, Authentication, Authorization, Account (“AAA”) proxy or service, user-based authorization control, ASN to CSN Tunnels, billing for WiMAX subscribers, and settlement between operators, tunneling between CSNs in roaming, switching between ASNs, and various WiMAX services (such as location-based services, multimedia multicast and broadcast services, IP Multimedia Subsystem Service).
  • AAA Authentication, Authorization, Account
  • the MS/SS is a (mobile) terminal that the user uses to access the WiMAX network.
  • WiMAX WiMAX and its network architecture.
  • MBS Mobile Broadbands
  • video conferencing online education
  • interactive multicast and broadcast technologies are implemented, but these services are ported to mobile networks, compared to general data, because of the large amount of data, long duration, delay sensitivity, etc.
  • the mobile network has a specific network structure, functional entities and wireless interfaces, etc.
  • Existing IP multicast and broadcast technologies are not directly applicable to mobile networks.
  • WiMAX defines MBS services, which are point-to-multipoint services that provide a data source to transmit data to multiple users in a mobile network. Resource sharing, improve the utilization of network resources, especially air interface resources. WiMAX-defined MBS not only enables low-speed message-like multicast and broadcast in plain text, but also enables multicast and broadcast of high-speed multimedia services, which undoubtedly conforms to the trend of future mobile data development.
  • a service flow identifier (“SFID") is used to identify different one-way service flows, and different connections are identified by CIDs. All service flows are transmitted through the MAC layer connection in the air interface. The service flow is transmitted on the corresponding connection by mapping between the SFID of the service flow and the CID connected to the MAC layer. Based on the above identification, the MBS service based on the WiMAX network also identifies the multicast connection through a multicast connection identifier (Multicast CID, referred to as "MCID”), and identifies a multicast service through a multicast content identifier (MBS Contents ID).
  • MCS CID multicast connection identifier
  • a Protocol Data Unit (“PDU") transmitted on a Multicast CID may contain one or more MBS services.
  • some globally defined service flows may carry broadcast or multicast information to multiple terminals. These service flows include Quality of Service (QoS) parameters. To improve service security, It can be encrypted with a globally defined data encryption key.
  • QoS Quality of Service
  • the MBS service based on WiMAX network supports two access modes: single base station access and multiple base station access.
  • MBS domain ie, MBS Zone, identified by MBS_zone ID
  • An MBS domain is a collection of base stations, and all base stations in an MBS domain use the same MCID and MBS.
  • MBS GSA MBS Group Security Association
  • the terminal that has registered the MBS service can receive the MBS service data through multiple base stations in the MBS domain, and the terminal is in the idle state.
  • Single-base station access MBS is a special case of multi-base station access MBS.
  • the MBS domain is limited to one base station coverage. All users in the MBS domain receiving the MBS use the same MCID.
  • the Downlink MAP (DL-MAP) message broadcast on the broadcast connection identifier (Broadcast CID) contains one or more MBS-MAP-IEs, and each item on the MBS-MAP-IE is identified by the MBS domain ID.
  • a MBS-MAP-IE identifies the physical resources of an MBS-MAP message broadcast on the air interface. Source; if it is a single base station mode, it directly indicates the physical resources of the MBS service.
  • an MBS-MAP message may contain zero to one or more MBS-DATA-IEs or extended MBS-DATA-IEs.
  • the physical parameters between these MBS-DATA-IEs may be consistent or inconsistent, by the network side. Decided; but an MBS-DATA-IE has only one physical parameter set.
  • one MBS-DATA-IE contains one or more multicast CIDs; one is required
  • the MBS-DATA-IE contains one or more multicast CIDs, which are for the purpose of reducing the length of the MBS-MAP message, and the MBS data corresponding to the Downlink Interval Usage Code ("DIUC").
  • Multicast CIDs are indicated in an MBS-DATA-IE.
  • the same MAC PDUs of DIUC are placed on a physical resource burst (Burst) for transmission.
  • Burst physical resource burst
  • the multicast CID on the MAC PDU header can be passed.
  • Distinguished on the MAC layer Not all multicast CIDs correspond to the same MBS service, but each multicast CID corresponds to one MBS service.
  • an extended MBS-DATA-IE also contains one or more logical channel IDs.
  • the logical channel ID is used in the air interface to inform the terminal whether the currently indicated MBS data has content of interest.
  • DCD Downlink Channel Descriptor
  • DCD Downlink Channel Descriptor
  • the content identification Content ID Content ID and multicast CID and logical channel ID group information - corresponding.
  • the Content ID is used to identify the upper layer data stream carried by the WiMAX access network service flow (SF, Service Flow).
  • the DL-MAP message indicates the physical resource to be sent by the next MBS-MAP message, but does not distinguish the multicast CID and the logical channel ID included in the MBS-MAP message; the MBS-DATA-IE also has the next MBS-MAP message.
  • the indication of the physical resource is that the MBS-MAP message here is a special MBS-MAP message, which must contain an MBS-DATA-IE, the MBS-DATA-IE owns and the current MBS. -DATA-IE - Multicast CID and Logical Channel ID. In this way, the terminal does not need to receive the DL-MAP message one by one, and only needs to know the transmission time of the next MBS-MAP message from the current MBS-MAP-IE.
  • MBS-DATA-IE there is a change indication in MBS-DATA-IE. If there is no change, it will receive MBS data directly; otherwise, it needs to parse the new MBS-DATA-IE to update the relevant MBS information of the terminal.
  • the embodiment of the invention provides a downlink transmission method for a multicast broadcast service, a system thereof, and a base station, so that the terminal can receive the specified MBS service from the air interface.
  • the present invention provides a downlink transmission method for a multicast broadcast service, including:
  • the MBS service is carried in the IP flow and sent to the access service network gateway;
  • the access service network gateway carries the received IP flow into the service flow, and sends the service through the tunnel to the base station;
  • the base station transmits the MBS content in the received service flow in an air interface connection.
  • the invention also provides a method for setting a logical channel identifier, comprising:
  • the present invention also provides a method for a base station to send a multicast broadcast service, including:
  • the MAC PDU is carried in different logical channels for transmission.
  • the present invention also provides a wireless communication system including an MBS server, at least one access service network gateway, and a base station, wherein
  • the MBS server further includes an MBS server service transmission unit for carrying the MBS service in the IP flow and sent to the access service network gateway;
  • the access service network gateway further includes an access service network gateway service transmission unit configured to carry each IP flow from the MBS server in the service flow and send the data to the base station;
  • the base station further includes a base station service transmission unit for transmitting each MBS service in the service flow from the access service network gateway in a logical channel connected by the air interface.
  • the invention also provides a base station, comprising:
  • a MAC PDU generating module configured to generate a MAC PDU according to the MBS service content
  • a sending module configured to send the MAC PDU generated by the MAC PDU generating module to be sent in different logical channels.
  • the technical solution of the present invention carries the MBS service in the IP flow and sends it to the ASN gateway, and the access service network gateway carries the received IP flow to one or more service flows, and passes each service flow separately. Different tunnels are sent to the base station; the base station transmits the MBS content in the received service flow in the air interface connection, so that the terminal can receive the specified MBS service from the air interface.
  • FIG. 1 is a schematic structural diagram of a WiMAX network in the prior art
  • FIG. 2 is a flowchart of a downlink transmission method of an MBS service according to a first embodiment of the present invention
  • FIG. 3 is a flowchart of a downlink transmission method of an MBS service according to a second embodiment of the present invention
  • FIG. 4 is an MBS according to a third embodiment of the present invention.
  • FIG. 5 is a flowchart of a downlink transmission method of an MBS service according to a fourth embodiment of the present invention
  • FIG. 6 is a flowchart of a downlink transmission method of an MBS service according to a fifth embodiment of the present invention
  • FIG. 8 is a schematic diagram of adding an LCID to a MAC PDU header by Method 1 in a method for downlink transmission of an MBS service according to a sixth embodiment of the present invention.
  • FIG. 9 is a schematic diagram of adding an LCID to a MAC PDU header by Method 2 in a downlink transmission method of an MBS service according to a sixth embodiment of the present invention.
  • FIG. 10 is a schematic diagram of adding an LCID extension subheader to a MAC PDU header by Method 3 in a method for downlink transmission of MBS services according to a sixth embodiment of the present invention. detailed description
  • different MBS services are carried in different IP flows, and different SFIDs, transmission R6 tunnels, MCIDs, logical channel identifiers ("LCIDs") or any combination thereof are adopted. Differentiating these MBS services enables the base station to uniquely indicate an MBS service, and the terminal can receive a specific MBS service on the designated connection according to the indication of the base station.
  • SFIDs transmission R6 tunnels
  • MCIDs logical channel identifiers
  • LCIDs logical channel identifiers
  • the first embodiment of the present invention relates to a MBS service downlink transmission method.
  • the MBS server carries the MBS service bearer in the IP stream and sends it to the ASN gateway.
  • the ASN gateway allocates different SFIDs for each received IP stream, corresponding to For different service flows, each service flow is transmitted to the base station through a different R6 tunnel. Then, the process proceeds to step 203.
  • the base station allocates different MCIDs for the received service flows, and converts the data packets on the different service flows into MAC PDUs and transmits them to the terminal in different air interface connections.
  • the terminal that needs to receive the MBS service may request the base station to join the service, obtain information such as the MCID of the service, and receive the MBS service from the air interface connection identified by the MCID.
  • the second embodiment of the present invention relates to a downlink transmission method for an MBS service, and the present embodiment is substantially the same as the first embodiment, except that in the first embodiment, the base station allocates different MCIDs for different service flows;
  • the service flows of the same QoS parameter of the same MBS service that is, the QoS of the MBS service corresponding to the service flows are the same
  • the same MCID is allocated, and different logical channels are used to carry different IP flow.
  • the MBS server carries the MBS service in the IP stream and sends it to the ASN gateway.
  • the ASN gateway allocates different SFIDs to the received IP flows, corresponding to different service flows, and transmits the service flows to the base station through different R6 tunnels.
  • the ASN gateway may also inform the base station of the correspondence between the content identifier (Content-ID) and the SFID for uniquely identifying the MBS service, so that the base station can determine the MBS service corresponding to each service flow.
  • the base station allocates the MCID for the service flows corresponding to different MBS services, allocates the same MCID to the service flows with the same QoS parameters of the same MBS service, and converts the data packets on different service flows with the same QoS parameters of the same MBS service.
  • It is a MAC PDU, and the MAC PDU is transmitted to the terminal in different logical channels connected by the same air interface.
  • the base station and the terminal can distinguish different MBS services by using the LCID, so that when the terminal requests an MBS service, the base station can send the LCID to instruct the terminal to receive the MBS service in the designated logical channel connected to the designated air interface.
  • a third embodiment of the present invention relates to a downlink transmission method for an MBS service.
  • the present embodiment is substantially the same as the second embodiment.
  • the ASN allocates different SFIDs for different IP flows, and the corresponding ones are different.
  • the ASN allocates the same SFID to the IP flows of the same QoS parameter of the same MBS service, and transmits them to the base station through different R6 tunnels.
  • the MBS server carries the MBS service bearer in the IP stream and sends it to the ASN gateway.
  • the ASN gateway allocates an SFID to each received IP stream, and allocates the same service flow identifier for the same IP flow of the same MBS service, and passes the same IP flow with the same QoS parameter of the same MBS service.
  • a different R6 tunnel of a service flow is transmitted to the base station.
  • the ASN gateway may also inform the base station of the correspondence between the content identifier for uniquely identifying the MBS service and the transmission R6 tunnel, so that the base station can determine the MBS service corresponding to the service flow in each R6 tunnel.
  • the base station allocates the MCID to the received service flow, and converts the content from the different R6 tunnels in the same service flow into MAC PDUs, which are respectively carried in different logical channels connected by the same air interface to the terminal.
  • the base station and the terminal can distinguish different MBS services by using the LCID, so that when the terminal requests an MBS service, the base station can send the LCID to instruct the terminal to receive the MBS service in the corresponding logical channel that is connected to the designated air interface.
  • the fourth embodiment of the present invention relates to a downlink transmission method for MBS services.
  • the difference between this embodiment and the third embodiment is that, in the third embodiment, the ASN allocates the same SFID to the IP flows of the same QoS parameter of the same MBS service.
  • Different R6 tunnel transmissions are transmitted to the base station; in this embodiment, a base station granular R6 tunnel is established between the ASN gateway and the base station, and the IP flow from the MBS server is sent to the base station through the tunnel, and the base station performs Differentiate service parameters of different IP flows and map them to different MCIDs and LCIDs.
  • the so-called "base station granularity" means that only one tunnel is established between the ASN gateway and each subordinate base station.
  • the MBS server carries the MBS service in the IP stream and sends it to the ASN gateway.
  • the ASN gateway transmits the received IP flows directly to the base station through the R6 tunnel of the base station granularity.
  • the ASN gateway also needs to inform the base station of the correspondence between the multicast IP stream and the content identifier.
  • the base station analyzes the IP data packets to obtain the IP flow information, and then distinguishes the IP flows in the R6 tunnel according to the correspondence between the IP flows and the content identifiers, and is the same MBS service.
  • the IP flows with the same QoS parameters are assigned the same MCID, and the IP flows with the same QoS parameters of the same MBS service are converted into MAC PDUs, and the MAC PDUs are carried in different logical channels connected to the same air interface to the terminal.
  • the base station and the terminal can distinguish the different MBS services by using the LCID, so that the base station can deliver the LCID when requesting an MBS service. Instructing the terminal to receive the MBS service in the corresponding logical channel.
  • a fifth embodiment of the present invention relates to a downlink transmission method of an MBS service.
  • the ASN gateway classifies the IP flow through the Type-2 tunneling method, maps it to a service flow, and then performs IP header compression on the service flow to obtain the MAC service data from the MAC service data.
  • a Service Data Unit (“SDU") is divided into MAC PDUs, and control information (such as LCID) may be included in the MAC PDU.
  • the MBS server carries the MBS service in the IP stream and sends it to the ASN gateway.
  • the ASN gateway allocates an SFID for each received IP stream, allocates the same SFID for the same IP flow of the same MBS service, and converts the data of each IP stream into a MAC through the Type-2 tunneling mode.
  • Layer data packets such as MAC PDUs, transmit MAC layer data packets formed by different IP flows in the same service flow to the base station through different R6 tunnels.
  • the ASN gateway converts the IP stream into a MAC PDU for transmission, so that the terminal can distinguish different multicast IP streams at the MAC layer, and does not need to combine all the MAC PDUs into IP data packets to distinguish the IP data packet. Whether it is what you need to receive, this can save the calculation and energy effect for the terminal.
  • the base station allocates an MCID for each received service flow, and converts the MAC data packets from different R6 tunnels in the same service flow into MAC PDUs (if it is already a MAC PDU, no conversion is needed), and the The MAC PDUs are respectively transmitted to the terminal in different logical channels connected by the same air interface.
  • the base station and the terminal can distinguish different MBS services by using the LCID, so that when the terminal requests an MBS service, the base station can instruct the terminal to receive the MBS service in the corresponding logical channel by sending the LCID.
  • a sixth embodiment of the present invention relates to a downlink transmission method for an MBS service, and the present embodiment is substantially the same as the fifth embodiment, except that in the present embodiment, an LCID is included in control information of a MAC PDU header formed by an ASN gateway. Regardless of how the data of the ASN gateway to the base station is transmitted, the base station can directly transmit the data to the terminal through the logical channel of the corresponding air interface connection.
  • the MBS server carries the MBS service in the IP stream and sends it to the ASN gateway.
  • the ASN gateway converts the IP stream from the MBS server into a MAC. PDU, and set the same LCID for the MAC PDU formed by the same IP flow, and send the MAC PDU to the base station through the tunnel.
  • the base station carries the received MAC PDU in the logical channel of the corresponding air interface connection according to the LCID in the MAC PDU. Send to the terminal. Since the ASN gateway splits the IP flow into MAC PDUs for transmission, and adds the LCID to the control information of the MAC PDU header, the base station can directly directly associate the relevant MAC PDUs regardless of the form of transmission between the ASN gateway and the base station.
  • the terminal is able to transmit to the terminal through the corresponding logical channel, and the terminal can identify whether the received data packet is required by the MAC layer, and does not need to combine the received MAC PDU into an IP packet, and then recognizes, thereby reducing the operation of the terminal.
  • the original reserved field in the header of the MAC PDU is used to identify whether the MAC PDU is carrying the MBS service, that is, the original reserved field (Rsv) is changed to the MBS field, which is used to identify the MBS service, if the MAC PDU carries the MBS. For business data, set this field to 1, otherwise set to 0.
  • the MBS field is 1, an LCID field is added to the header of the MAC PDU to set the LCID.
  • a reserved field may be optionally added, as shown in FIG. Compared with the first method, the method can reduce the space of the MAC PDU and improve the utilization of the air interface resource when the MBS service is not transmitted.
  • the extended subheader field can be set to 1 by using the extended subheader technology existing in the prior art, and an extended subheader is configured for the MAC PDU to set the LCID.
  • the structure of the head is shown in Figure 10.
  • the LCID identifier is added, so that the terminal can identify from the MAC layer whether the received data packet is required by itself, that is, receiving the service of interest from the MAC layer, and the terminal does not need to synthesize the data packet.
  • the identification is performed, which reduces the complexity of the terminal operation.
  • the terminal still needs to receive data in a burst (Burst) at the physical layer and then distinguish it at the MAC layer.
  • each LCID may be allocated an independent physical resource in the extended MBS-DATA-IE, and the MAC PDU in the corresponding logical channel is transmitted through the allocated physical resource, so that the terminal The received data can be identified from the physical layer, so that only the MAC PDIL of interest to the terminal is received.
  • Allocate physical resources for each logical channel in units of subchannels. By setting the number of allocated subchannels, assign each symbol to all symbols belonging to its air interface connection on at least one subchannel.
  • Allocate physical resources for each logical channel in units of symbols. By setting the number of assigned symbols, each logical channel is assigned at least one symbol on all subchannels whose air interface is connected.
  • extension MB S-DATA-IE specified by 802.16e is as follows:
  • Each LCID adds a subchannel length attribute description.
  • each LCID is added with a Symbol length attribute description.
  • each LCID adds a Slot length attribute description.
  • OFDMA Symbol Number 7 choose one of them, corresponding to the first
  • resource allocation may be performed in units of Subchannel, or resource allocation may be performed in units of Symbol, or resource allocation may be performed in units of Slots.
  • resource allocation is performed in units of Slots, it can be further divided into Subchannel priority and Symbol priority.
  • each MBID a separate MBS DIUC, OFDMA symbol offset (start symbol), Subchannel offset (starting subchannel), Boosting (power boost), No. OFDMA symbols (number of symbols), No. subchannels (child) Number of channels), Repetition coding indication
  • MBS DIUC, Boosting, Repetition coding indication is not directly related to resource allocation, if MBS DIUC, Boosting, is allocated for each LCID,
  • the Repetition coding indication is the same, except that the OFDMA symbol offset (starting symbol), Subchannel offset (starting subchannel), No. OFDMA symbols (number of symbols), and No. subchannels (number of subchannels) are different, and the logical channels can be unified.
  • Assign MBS DIUC, Boostings Repetition coding indication as shown below.
  • non-extended MBS-DATA-IE can also be used. , details as follows:
  • the allocation of physical resources is placed in the description loop of the MCID, and each MCID is assigned a different physical resource.
  • the specific manner of dividing the physical resources may be performed according to the above logical subchannel: defining symbol offset, subchannel offset, number of symbols, number of subchannels; defining only the number of symbols, order allocation; defining only the number of subchannels, order allocation; Number of slots, orderly allocation.
  • a seventh embodiment of the present invention relates to a wireless communication system.
  • the MBS server includes at least one ASN gateway and a base station, where the MBS server further includes an MBS server service transmission unit for carrying the MBS service in the IP stream and sent to the ASN gateway; the ASN gateway further includes The IP stream carries the ASN gateway service transmission unit that is sent to the base station in the service flow; the base station further includes a base station service transmission for transmitting each MBS service in the service flow from the ASN gateway to the terminal in a logical channel connected to the air interface. unit.
  • the ASN gateway service transmission unit and the base station service transmission unit may also have one of the following six functions:
  • the ASN gateway service transmission unit is further configured to allocate different SFIDs for each IP flow from the MBS server, corresponding to different service flows, and transmit each service flow to the base station through different R6 tunnels respectively;
  • Each of the service flows from the ASN gateway is assigned a different MCID, and the data packets on the different service flows are converted into MAC PDUs and carried in different air interface connections to the terminal.
  • the access service network gateway service transmission unit is further configured to allocate different SFIDs for each IP flow from the MBS server, corresponding to different service flows, and transmit each service flow to the base station through different tunnels respectively;
  • the transmission unit is further configured to: allocate an MCID for each service flow from the access service network gateway, allocate the same MCID for the service flow with the same QoS parameter of the same MBS service, and convert the data packet on each service flow to which the same MCID is allocated.
  • the MAC PDU is sent to the terminal in different logical channels connected by the same air interface.
  • the access service network gateway service transmission unit is further configured to allocate the same SFID to the same IP flow with the same QoS parameter of the same MBS service, corresponding to one service flow, and transmit different IP flows belonging to the service flow to the base station through different tunnels. ; assign SFIDs to each IP flow from the MBS server, assign the same SFID to the IP flows if the QoS parameters of the IP flows are the same, and carry them in the same
  • the service flow is transmitted to the base station through different tunnels.
  • the base station service transmission unit is further configured to allocate an MCID for the service flow from the access service network gateway, and convert the content from different tunnels in the same service flow into MAC PDUs respectively. An air interface is sent to the terminal in a different logical channel.
  • the access service network gateway service transmission unit is further configured to: transmit, by the base station granularity tunnel, each IP flow from the MBS server to the base station; and the base station service transmission unit is further configured to: the same QoS parameter belongs to the same MBS service in the tunnel.
  • the IP flows are assigned the same MCID, and the IP flows that are assigned the same MCID are converted to MAC PDUs and sent to the terminals in different logical channels connected by the same air interface.
  • the access service network gateway service transmission unit is further configured to allocate an SFID for each IP flow from the MBS server, allocate the same SFID for the same IP flow of the same MBS service, correspond to one service flow, and associate each IP
  • the stream data is converted into a MAC layer data packet, and MAC layer data packets formed by different IP flows in the same service flow are transmitted to the base station through different tunnels; if the QoS parameters of the IP flows are the same, the same SFID is assigned to the IP flows, and Converting it into a MAC PDU, the bearer is transmitted to the base station through different tunnels in the same service flow;
  • the base station service transmission unit is further configured to allocate different MCIDs for the service flows from the access service network gateway, and the same service
  • the MAC layer data packets from different tunnels in the stream are converted into MAC PDUs and sent to the terminal in different logical channels connected by the same air interface.
  • the access service network gateway service transmission unit is further configured to: convert the IP stream from the MBS server into a MAC PDU, and set the same LCID for the MAC PDU formed by the same IP flow, and carry the MAC PDU through the tunnel in the corresponding Transmitted to the base station in the logical channel;
  • the base station service transmission unit is further configured to: according to the LCID in the MAC PDU, carry the received MAC PDU in a corresponding logical channel and send the signal to the terminal.
  • An eighth embodiment of the present invention relates to a system for setting a logical channel identifier, including a setting module, configured to add a field in a MAC layer packet header, and set an LCID.
  • the setting module adds an LCID field to the header of the MAC PDU and sets the LCID.
  • the reserved field in the MAC PDU header indicates whether the MAC PDU contains the LCID field.
  • the LCID field is added in the header of the MAC PDU, and the LCID is set.
  • the terminal can distinguish different MAC PDUs at the MAC layer, and does not need to form the IP layer data packets of the received MAC PDUs to be resolved, thereby reducing the receiving operation of the terminal and bringing convenience to the terminal.
  • a ninth embodiment of the present invention relates to a base station, including:
  • a resource allocation module configured to allocate independent physical resources for each logical channel included in the same air interface connection, and notify the terminal of the correspondence between the logical channel and its physical resources; and send a module, configured to form a MAC of different IP flows of the same MBS service
  • the PDU is transmitted to the terminal in physical resources corresponding to different logical channels. In this way, the terminal can recognize the received data from the physical layer, and only receives the MAC PDUs of interest to the terminal, thereby further reducing the complexity of the terminal receiving operation.
  • the resource allocation module allocates independent physical resources to the logical channel by using one of the following methods: allocating physical resources for the logical channel in units of subchannels, and assigning at least one sub-interface to each logical channel by setting the number of allocated subchannels All symbols on the channel that belong to their air interface connection.
  • a physical resource is allocated to the logical channel in units of symbols, and at least one symbol on all the subchannels whose air interface is connected is assigned to each logical channel by setting the number of allocated symbols.
  • allocating physical resources to the logical channel in units of basic time-frequency blocks and assigning at least one basic time-frequency block belonging to its air interface connection to each logical channel by setting the number of allocated basic time-frequency blocks.
  • the physical resources allocated for the logical channel are determined by setting the starting subchannel, the number of allocated subchannels, and the starting symbols and the number of allocated symbols on the subchannels.
  • a tenth embodiment of the present invention relates to a base station, including:
  • a module of a MAC PDU configured to generate a MAC PDU according to the MBS service content
  • a logical channel identifier setting module configured to set a logical channel identifier in a MAC PDU generated by a module of the MAC PDU;
  • a sending module configured to send the MAC PDU in a logical channel corresponding to the logical channel identifier.
  • the logical channel identifier setting module may set the logical channel identifier in one of the following manners:
  • the technical solution of the present invention sends the MBS service to the ASN gateway in the IP stream, and the ASN gateway allocates different SFIDs for the received IP flows, corresponding to different service flows, and the services are The traffic is transmitted to the base station through different tunnels.
  • the base station allocates different MCIDs for each service flow received, and the different service flows are sent to the terminal in different air interface connections, so that different MBS services are transmitted.
  • the MCID uniquely identifies an MBS service, so that the base station can uniquely determine the MBS service that the terminal needs to receive, and instruct the terminal to receive the MBS service from the corresponding air interface connection; or, the base station can also
  • the service flows with the same QoS parameters of the same MBS service are assigned the same MCID, and each service flow is transmitted to the terminal in different logical channels connected to the same air interface. The same can be used to determine the MBS service that the terminal needs to receive through the LCID.
  • the terminal receives the MBS service from the corresponding logical channel.
  • the ASN gateway allocates the same SFID to the same IP flows of the same MBS service with the same QoS parameters, and carries the IP flows in the same service flow and transmits them to the base station through different tunnels.
  • the base station can identify different IP flows according to the received tunnel.
  • the base station can also allocate the same MCID to the IP flows with the same QoS parameters of the same MBS service, and the service flows from different tunnels are sent to the terminal in different logical channels connected by the same air interface.
  • the LCID can also achieve the unique effect of identifying the MBS service, so that the terminal can receive the specified MBS service according to actual needs.
  • the ASN gateway may transmit the received IP flows to the base station through the tunnel of the base station granularity, identify and distinguish by the base station, allocate the same MCID to the IP flows with the same QoS parameters of the same MBS service, and convert the IP flows.
  • the MAC PDU is sent to the terminal in different logical channels connected by the same air interface.
  • the ASN gateway allocates the same SFID for the same IP flow of the same MBS service, and converts it into a MAC layer data packet by Type-2 tunneling, and carries the MAC layer data packet.
  • the same service flow it is transmitted to the base station through different tunnels, and the base station converts it into a MAC PDU and transmits it to the terminal through different logical channels, so that the terminal can
  • the MAC layer distinguishes whether the PDU contains the MBS service that needs to be received, which simplifies the operation of the terminal.
  • the ASN gateway after converting the IP stream into a MAC PDU, the ASN gateway adds an LCID to its packet header, and the base station can uniquely determine the MBS service and transmit the corresponding MAC PDU through the logical channel indicated by the LCID, regardless of the manner of transmission.
  • the terminal of interest can receive the MBS service from the corresponding logical channel.
  • the LCID can be set in three ways: directly add the LCID field in the MAC PDU; or set whether there is an indication of the LCID field in the MAC PDU, and add the LCID when the indication is to include the LCID field. High, when the LCID is not required to be set, the LCID field may not be transmitted, and the resource utilization is improved; or an extended subheader type is added for the MAC PDU, and the LCID is set in the extended subheader of the new type.
  • the base station may allocate an independent physical resource for each logical channel, transmit the MAC PDU in the corresponding logical channel through the allocated physical resource, and instruct the terminal to obtain the required MAC service data packet from the physical resource corresponding to the LCID, so that the terminal is in the
  • the physical layer can distinguish whether the currently received MAC PDU contains the MBS service data that it needs.

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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 un procédé de transmission sur une liaison descendante dans un service de multidiffusion et de diffusion générale ainsi que le système et la station de base correspondants dans un champ de communication sans fil, permettant au terminal de recevoir les services de MBS désignés par interface hertzienne. Dans la présente invention, la station de base fait la distinction entre les différents services MBS provenant du serveur MBS en fonction du SFID, de l'identification de tunnel, de l'identification de flux IP ou de l'identification de canal logique, entre autres, dans le tunnel ou dans les différents canaux logiques et envoie chaque service MBS à travers des canaux logiques différents. Une identification de canal logique supplémentaire pour MAC PDU peut également configurer une ressource physique séparée pour chaque canal logique.
PCT/CN2007/070920 2006-10-18 2007-10-18 Procédé pour envoyer un service de multidiffusion et de diffusion générale sur une liaison descendante et système et station de base correspondants WO2008049369A1 (fr)

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