WO2021218279A1 - 一种数据传输方法、装置及设备 - Google Patents

一种数据传输方法、装置及设备 Download PDF

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Publication number
WO2021218279A1
WO2021218279A1 PCT/CN2021/075803 CN2021075803W WO2021218279A1 WO 2021218279 A1 WO2021218279 A1 WO 2021218279A1 CN 2021075803 W CN2021075803 W CN 2021075803W WO 2021218279 A1 WO2021218279 A1 WO 2021218279A1
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WIPO (PCT)
Prior art keywords
data packet
network device
information
iab
address
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PCT/CN2021/075803
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English (en)
French (fr)
Inventor
许斌
李秉肇
陈磊
于海凤
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP21796084.8A priority Critical patent/EP4132020A4/en
Publication of WO2021218279A1 publication Critical patent/WO2021218279A1/zh
Priority to US17/975,916 priority patent/US20230049788A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/74—Address processing for routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/189—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/246—Connectivity information discovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points

Definitions

  • This application relates to the field of wireless communication technology, and in particular to a data transmission method, device and equipment.
  • base stations can adopt centralized control nodes- Distributed unit-distributed unit (CU-DU) separation architecture, that is: a gNB can be composed of one CU and one or more DUs, where CU and DU are connected through F1 interface, CU and core network (5GC ) Connect through the NG interface. The UE accesses the CU through the DU.
  • CU-DU Distributed unit-distributed unit
  • the current data transmission is mainly for unicast services, that is, the data of a certain unicast transmission service will only be sent to a certain A terminal device, and if the multimedia broadcast multicast service (MBMS) service is introduced in the subsequent 5G communication, since the MBMS service needs to be sent to multiple terminal devices at the same time, the current relay communication system is for unicast services
  • MBMS multimedia broadcast multicast service
  • the processing method cannot complete the transmission for MBMS services. Therefore, how to perform MBMS service transmission in a relay communication system is a problem to be solved urgently.
  • This application provides a data transmission method, device, and equipment to implement MBMS service transmission in a relay communication system.
  • this application provides a data transmission method that can be applied to a first network device, and the first network device can be a relay node in a relay communication system, such as an IAB node in an IAB system.
  • the first network device (IAB node) receives the first data packet, and the first data packet may be from a third network device in the IAB system, such as an IAB host node (donor) or a previous hop network device of the first network device.
  • the first network device matches the first information in the first data packet with its own second information, and if the two match, the first network device sends the first data packet to the UE that accesses the first network device.
  • the first data packet is a data packet of the first multimedia broadcast multicast service (multimedia broadcast multicast service, MBMS) service
  • the first data packet carries the first information
  • the first information is related to the first MBMS service.
  • the first information may include the routing address of the first MBMS service and/or the service identifier of the first MBMS service.
  • the second information is configured by the IAB donor node (donor) for the first network device for the first MBMS service, and the second information may include the routing address and/or the service identifier of the second MBMS service.
  • the first network device matches its own second information with the first information carried in the first data packet. If the two are the same, the first network device can consider the first data packet as the data it needs to receive. Then, the first network device can send the first data packet to the UE under it, so as to realize the transmission of the MBMS service in the relay communication system.
  • the above method further includes: the first network device sends the first data packet to N second networks Device, N is a positive integer.
  • the first network device when the second information of the first network device matches the first information of the first data packet, in addition to sending the first data packet to the UE that accesses itself, the first network device also sends the first data packet to the UE that accesses itself.
  • a data packet is sent to N second network devices.
  • the N second network devices may be next-hop network devices of the first network device in the foregoing relay communication system.
  • the method further includes: the first network device obtains N+1 copies of the first data packet according to the first data packet; the first network device transfers N+1 copies of the first data packet Respectively sent to the terminal device and N second network devices.
  • the above method further includes: if the second information of the first network device does not match the first information, the first network device sends the first data packet to the N second information.
  • Network equipment, N is a positive integer.
  • the second information of the first network device when the second information of the first network device does not match the first information of the first data packet, in addition to sending the first data packet to the UE underneath the first network device, because the first data The packet is the data of the first MBMS service, which means that there are other IAB nodes that also need to receive multicast data. Then, the first network device can also send the first data packet to N second network devices. In this way, MBMS services are transmitted in the IAB system.
  • the first network device sends the first data packet to N second network devices, including: the first network device obtains N copies of the first data packet according to the first data packet ; The first network device sends N copies of the first data packet to N second network devices respectively.
  • the above method further includes: if the next hop network device of the first network device is unavailable or the first network device If there is no next-hop network device in the network device, the first network device discards the first data packet.
  • the aforementioned N second network devices are all next-hop network devices of the first network device.
  • the aforementioned N second network devices may also be all available next-hop network devices of the first network device.
  • the first information may include: the routing address corresponding to the first MBMS service and/or the service identifier of the first MBMS service; the second information may include: configuration for the first network device The routing address and/or the service identifier of the second MBMS service.
  • the routing address configured for the first network device may correspond to the second MBMS service, and the second MBMS service may be the first MBMS service or other MBMS services.
  • the method further includes: the first network device determines N second network devices according to the first information; or, the first information further includes: path ID (PATH ID); The method further includes: the first network device determines N second network devices according to the path identifier.
  • the above method further includes: the first network device obtains third information, and the third information is used to indicate the mapping relationship between the path identifier and the second network device; the first network device
  • the determining of the N second network devices according to the path identifier includes: the first network device determines the N second network devices according to the path identifier and the third information.
  • the method before the first network device sends the first data packet to the terminal device, the method further includes: the first network device instructs the IP layer not to perform first processing on the first data packet, The first processing includes filtering the first data packet or discarding the first data packet according to the IP address carried in the first data packet; or, the first network device modifies the IP address of the first data packet to the first IP address, and The IP address is an IP address pre-configured for the first network device.
  • the backhaul adaptation protocol (BAP) entity (BAP layer) of the first network device instructs the IP layer to not discard the first data packet, that is, to instruct the IP layer not to follow the first data
  • the IP address carried in the packet filters the first data packet or discards the first data packet.
  • the BAP entity may also modify the IP address of the first data packet to the first IP address of the first network device.
  • the first network device sends the first data packet to the terminal device, including: the first network device obtains fourth information, and the fourth information includes the group configured for the first network device. Broadcast the IP address; the first network device sends the first data packet to the terminal device according to the multicast IP address.
  • this application also provides a data transmission method, which can be applied to a third network device, and the third network device can be the host node in the above-mentioned relay communication system, such as the IAB donor in the IAB system.
  • the method includes: a third network device configures corresponding first information for a first data packet of a first MBMS service; the third network device sends the first data packet to the first network device, and the first data packet carries the first information ,
  • the first information is used to trigger the first network device to perform at least one of the following operations: sending a first data packet to a terminal device connected to the first network device, sending the first data packet to N second network devices, and discarding the first data packet. data pack.
  • the method further includes: the third network device configures second information for the first network device, and the second information corresponds to the second MBMS service.
  • the second information includes: a routing address configured for the first network device and/or a service identifier of the second MBMS service.
  • the first information includes: a routing address corresponding to the first MBMS service and/or a service identifier corresponding to the first MBMS service.
  • the first information further includes: the path identifier corresponding to the first MBMS service; the method further includes: the third network device configures third information for the first network device, and the third information uses Yu represents the mapping relationship between the path identifier and the second network device.
  • the method further includes: the third network device configures fourth information for the first network device, and the fourth information includes the multicast IP address corresponding to the first MBMS service, the multicast IP The address is used to instruct the first network device to send the first data packet to the terminal device.
  • this application also provides a data transmission method, which can be applied to a first network device, and the first network device can be a relay node in a relay communication system, such as an IAB node in an IAB system.
  • the method includes: a first network device receives a second data packet sent by a fourth network device in a unicast or multicast manner, the second data packet is a third MBMS service data packet; the first network device transmits the second data packet It is sent to the terminal device accessing the first network device and/or the second network device in a unicast or multicast manner.
  • receiving the second data packet sent by the fourth network device by the first network device in a multicast manner includes: the first network device obtains configuration information corresponding to the second data packet; The first network device receives the second data packet according to the configuration information.
  • the configuration information includes at least one of the following: the temporary packet radio network identifier G-RNTI corresponding to the third MBMS service, the time domain location information for receiving the second data packet, and the receiving second The frequency domain position information of the data packet.
  • the present application provides a communication device.
  • the communication device may be a data transmission device or a chip or a system on a chip in the data transmission device, and may also be a data transmission device for implementing any of the first aspect or the first aspect.
  • the communication device can implement the functions performed by the first network device in the foregoing first aspect, second aspect, or possible implementations thereof, and the functions can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the communication device may include: a first receiving module, configured to receive a first data packet, the first data packet is a data packet of the first MBMS service, the first data packet carries the first information;
  • the module is used to send the first data packet to the terminal device accessing the first network device if the second information of the first network device matches the first information, and the second information is pre-configured for the first network device .
  • the first sending module is further configured to send the first data packet to N second network devices if the second information of the first network device matches the first information , N is a positive integer.
  • the first sending module is further configured to obtain N+1 copies of the first data packet according to the first data packet; and send N+1 copies of the first data packet to the terminal respectively Equipment and N second network equipment.
  • the apparatus further includes: a second sending module, configured to send the first data packet to N data packets if the second information of the first network device does not match the first information For the second network device, N is a positive integer.
  • the second sending module is further configured to obtain N copies of the first data packet according to the first data packet; and respectively send the N copies of the first data packet to N second networks equipment.
  • the second sending module is also used for if the second information of the first network device does not match the first information, and the next hop network device of the first network device is unavailable , The first data packet is discarded.
  • the N second network devices are all next-hop network devices of the first network device.
  • the first information includes: the routing address corresponding to the first MBMS service and/or the service identifier of the first MBMS service; the second information includes: the routing configured for the first network device Address and/or service identifier of the second MBMS service.
  • the apparatus further includes: a first processing module, configured to determine N second network devices according to the first information; or, the first information further includes: PATH ID ); The first processing module is also used to determine N second network devices according to the path identifier.
  • the first processing module is further used for the first network device to obtain third information, and the third information is used to indicate the mapping relationship between the path identifier and the second network device;
  • the path identifier and the third information determine N second network devices.
  • the first sending module is specifically configured to instruct the IP layer not to perform first processing on the first data packet before sending the first data packet to the terminal device, and the first processing includes Filter the first data packet or discard the first data packet according to the IP address carried in the first data packet; or modify the IP address of the first data packet to the first IP address, where the first IP address is the first network device Pre-configured IP address.
  • the first sending module is also used to obtain fourth information, and the fourth information includes a multicast IP address configured for the first network device;
  • the data packet is sent to the terminal device.
  • the present application provides a communication device.
  • the communication device may be a data transmission device or a chip or a system on a chip in the data transmission device, and may also be a data transmission device for implementing any of the second aspect or the second aspect.
  • the communication device can implement the functions performed by the third network device in the foregoing aspects or in each possible implementation manner, and the functions can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the communication device includes: a second processing module, configured to configure corresponding first information for the first data packet of the first MBMS service; and a third sending module, configured to send the first data packet to the first data packet.
  • the first data packet carries first information, and the first information is used to trigger the first network device to perform at least one of the following operations: send the first data packet to the terminal device connected to the first network device, and send the first data packet to the Nth Second, the network device sends the first data packet, and discards the first data packet.
  • the second processing module is further configured to configure second information for the first network device, and the second information corresponds to the second MBMS service.
  • the second information includes: a routing address configured for the first network device and/or a service identifier of the second MBMS service.
  • the first information includes: a routing address corresponding to the first MBMS service and/or a service identifier corresponding to the first MBMS service.
  • the first information further includes: the path identifier corresponding to the first MBMS service; the second processing module is also used to configure third information for the first network device, and the third information is used for Yu represents the mapping relationship between the path identifier and the second network device.
  • the second processing module is further configured to configure fourth information for the first network device.
  • the fourth information includes the multicast IP address corresponding to the first MBMS service, and the multicast IP The address is used to instruct the first network device to send the first data packet to the terminal device.
  • the present application provides a communication device.
  • the communication device may be a data transmission device or a chip or a system on a chip in the data transmission device, and may also be a data transmission device for implementing any of the third aspect or the third aspect.
  • the communication device can implement the functions performed by the first network device in the above three aspects or each possible implementation manner, and the functions can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the communication device includes: a second receiving module, configured to receive a second data packet sent by a fourth network device in a unicast or multicast manner, and the second data packet is a third multimedia broadcast multicast Service data packet of MBMS service; the fourth sending module is used to send the second data packet to the terminal device accessing the first network device and/or the second network device in a unicast or multicast manner.
  • the fourth sending module is specifically configured to obtain configuration information corresponding to the second data packet; and receive the second data packet according to the configuration information.
  • the configuration information includes at least one of the following: the temporary packet radio network identifier G-RNTI corresponding to the third MBMS service, the time domain location information for receiving the second data packet, and the receiving second The frequency domain position information of the data packet.
  • the present application provides a network device, including: a processor and a memory; the processor is coupled to the memory, and the processor is configured to read and execute instructions in the memory to implement the first and third aspects as described above And the data transmission methods in its possible implementations.
  • the present application provides a network device, including: a processor and a memory; the processor is coupled to the memory, and the processor is configured to read and execute instructions in the memory to implement the second aspect and its possibilities as described above.
  • the data transmission method in the implementation mode includes: a processor and a memory; the processor is coupled to the memory, and the processor is configured to read and execute instructions in the memory to implement the second aspect and its possibilities as described above. The data transmission method in the implementation mode.
  • this application provides a computer-readable storage medium, which stores instructions. When the instructions are run on a computer, they are used to execute the data transmission method in any one of the first to third aspects.
  • this application provides a computer program or computer program product, which when the computer program or computer program product is executed on a computer, enables the computer to implement the data transmission method of any one of the first and/or third aspects above .
  • this application provides a communication system, including IAB donor, IAB node, and UE; among them, IAB donor is used to perform any of the data transmission methods in the second aspect; IAB node is used to perform the first The data transmission method of any one of the first aspect and/or the third aspect.
  • the communication system may be an IAB system.
  • FIG. 1 is a schematic structural diagram of a communication system in an embodiment of the application
  • 2 is a schematic diagram of the protocol stack structure of the user plane of the communication system in an embodiment of the application
  • FIG. 3 is a schematic flowchart of a configuration method in an embodiment of the application.
  • FIG. 4 is a schematic diagram of the first flow of a data transmission method in an embodiment of this application.
  • Fig. 5 is a schematic diagram of a BAP header format of a unicast service data packet in an embodiment of the application
  • FIG. 6 is a schematic diagram of a BAP header format of a multicast service data packet in an embodiment of the application
  • FIG. 7 is a schematic diagram of a BAP header format in an embodiment of the application.
  • FIG. 8 is a schematic diagram of a second flow of a data transmission method in an embodiment of this application.
  • FIG. 9 is a schematic diagram of a third process of the data transmission method in an embodiment of this application.
  • FIG. 10 is a schematic diagram of a structure of a communication device in an embodiment of this application.
  • FIG. 11 is a schematic diagram of a second structure of a communication device in an embodiment of this application.
  • FIG. 12 is a schematic diagram of a third structure of a communication device in an embodiment of this application.
  • the corresponding device may include one or more units such as functional units to perform the described one or more method steps (for example, one unit performs one or more steps) , Or multiple units, each of which performs one or more of multiple steps), even if such one or more units are not explicitly described or illustrated in the drawings.
  • the corresponding method may include one step to perform the functionality of one or more units (for example, one step executes one or more units). The functionality, or multiple steps, each of which performs the functionality of one or more of the multiple units), even if such one or more steps are not explicitly described or illustrated in the drawings.
  • Unicast A point-to-point communication technology, that is, a single point of communication between a network device and a terminal device.
  • the network device can send data separately for each terminal device.
  • Unicast can also be called unicast transmission mode or unicast transmission technology.
  • Sending by unicast transmission means that when the sending device sends the transport block (TB) corresponding to the protocol data unit (protocol data unit, PDU), the cell network temporary identifier (C-RNTI) is used.
  • C-RNTI cell network temporary identifier
  • a receiving device receives the same PDU according to the C-RNTI; or the unicast transmission of the PDU can refer to the PDU Transmission is carried out in a radio bearer established for unicast transmission or in a channel specially designed for unicast transmission.
  • Receiving by unicast transmission means that when unicast transmission is used, the above-mentioned receiving device receives PDUs according to C-RNTI; or the above-mentioned receiving device receives through the radio bearer established for unicast transmission or when it is used for unicast transmission. Receive on the channel.
  • Multicast Point-to-multipoint communication technology, which can also be called multicast transmission method or multicast transmission technology, used to serve multimedia broadcast multicast services. Multicast can also be called multicast, and can also be called a broadcast technology in some broad scenarios, but there are differences between multicast and traditional broadcast technology.
  • the multicast transmission mode is adopted, for the same data, multiple terminal devices simultaneously receive the same data during the transmission process of the network device (for example, the base station).
  • MBSFN multimedia broadcast multicast service single frequency network
  • SC-PTM single cell point to multipoint
  • other multicast transmission technologies also fall within the scope of the embodiments of the present application, and are not limited thereto.
  • Sending by multicast transmission means that when the sending device sends the TB corresponding to the PDU, it uses a group radio network temporary identifier (G-RNTI) to scramble the PDU or scramble the DCI corresponding to the PDU.
  • G-RNTI group radio network temporary identifier
  • One or more receiving devices receive the same PDU according to the same G-RNTI.
  • transmitting the PDU in a multicast manner may refer to informing multiple receiving devices of the location of the same PDU in a semi-static manner, and multiple receiving devices can receive the PDU at the same time.
  • the use of multicast to transmit the PDU may mean that the PDU is transmitted in a radio bearer established for multicast transmission or transmitted in a channel specially designed for multicast.
  • Receiving by multicast transmission means that when the peer uses multicast transmission, one of the multiple receiving devices receives the PDU according to G-RNTI; or one of the multiple receiving devices establishes for multicast transmission
  • the radio bearer receives or receives PDUs on the channel used for multicast transmission.
  • MBMS service point-to-multipoint unidirectional multimedia service. For example, on the air interface, a multimedia broadcast service is sent to users in a cell through a common channel, or a multicast service subscribed by a user is sent to users in a cell in a multicast manner, thereby saving air interface resources.
  • the embodiment of the present application provides a communication system.
  • the communication system may be an IAB system or other communication systems with a relay function, such as a relay system based on terminal device relay.
  • the communication system may include: a terminal device, an IAB node (IAB node), and an IAB host node (IAB donor); among them, the terminal device may communicate with the IAB node or the IAB donor, and the terminal device may communicate with the IAB node or IAB donor.
  • the communication link between the IAB node is recorded as the access link; in addition, the IAB node can communicate with other IAB nodes or with the IAB donor, and the communication link between the IAB node and the IAB node or with the IAB donor
  • the road is marked as a backhaul link.
  • the above-mentioned terminal device may be a device that provides voice or data connectivity to users, for example, it may also be called user equipment (UE, User Equipment), mobile station (mobile station), subscriber unit (subscriber unit), station (STAtion) Or terminal equipment (TE, Terminal Equipment), etc.
  • the terminal can be a cellular phone (cellular phone), personal digital assistant (PDA, Personal Digital Assistant), wireless modem (modem), handheld device (handheld), laptop computer (laptop computer), cordless phone (cordless phone), wireless Local loop (WLL, Wireless Local Loop) station or tablet computer (pad), etc.
  • devices that can access the wireless communication system, communicate with the network side of the wireless communication system, or communicate with other devices through the wireless communication system can all be the terminals in the embodiments of the present application, such as , Terminals and cars in smart transportation, household equipment in smart homes, power meter reading equipment in smart grids, voltage monitoring equipment, environmental monitoring equipment, video monitoring equipment in smart security networks, cash registers, etc.
  • the terminal can communicate with the network device, and multiple terminals can also communicate with each other.
  • the terminal can be statically fixed or mobile.
  • Fig. 1 is a schematic structural diagram of a communication system in an embodiment of this application.
  • the communication system 10 includes: terminal equipment (such as UE) 11, IAB node1, IAB node2 And IAB donor.
  • the UE accesses the IAB node2 (that is, accesses the IAB node), and the IAB donor is connected to the core network (such as 5GC) through the NG interface.
  • IAB donor is the previous hop IAB node of IAB node1
  • IAB node1 is the previous hop IAB node of IAB node2
  • IAB node2 is the previous hop IAB node of the UE.
  • IAB node1 can be divided into two units: distributed unit (DU) and mobile terminal (MT).
  • IAB node2 can be divided into two units, DU and MT.
  • IAB donor can be DU and centralized unit (CU). ) Two units.
  • IAB node1 DU and IAB node1 MT communicate through the internal interface
  • IAB node2 DU and IAB node2 MT communicate through the internal interface
  • IAB donor DU and IAB donor CU communicate through the F1 interface.
  • the interface between UE and IAB node2 (specifically the interface between UE and IAB node2 DU) is marked as Uu interface
  • the interface between IAB node2 and IAB node1 (specifically the interface between IAB node2 MT and IAB node1 DU) ) Is marked as Uu2 interface
  • the interface between IAB node1 and IAB donor is marked as Uu1 interface.
  • the IAB system is also applied to N-hop data return scenarios, such as three-hop data return scenarios, five-hop data return scenarios, and eight-hop data return scenarios.
  • N the number of IAB nodes in the IAB system N may be an integer greater than or equal to 2, such as 3, 5, 8, etc., which is not specifically limited in the embodiment of the present application.
  • FIG. 2 is a schematic diagram of the protocol stack structure of the user plane of the communication system in the embodiment of the application.
  • a BAP entity (BAP layer) is newly added to the IAB base station compared to a normal base station. Its main function is the routing function.
  • the BAP entity of the IAB node MT receives the data packet and determines the next step of the data packet, for example, the BAP entity of the MT transfers the data packet to the higher layer (including but not limited to the IP layer) of the IAB base station for processing, For example, perform IP screening, read data packet information in the IP header, and send the processed data packet through the air interface to the UE that accesses the IAB base station (it can be understood as the UE under the IAB base station), or MT
  • the BAP layer forwards the data packet to the equivalent BAP layer in the DU in the device for processing, and forwards the processed data packet to the next IAB node, that is, the next IAB base station.
  • routing ID For the BAP entity, the basis for determining the destination of a data packet is the BAP address and PATH ID in the packet header, where the BAP address and PATH ID are collectively referred to as routing ID (routing ID). Take the following data transmission as an example.
  • the IAB donor base station When each IAB base station is established, the IAB donor base station will assign the IAB base station its own address, that is, the BAP address, and specify the next hop of the IAB base station in the return routing information.
  • the routing ID in the returned routing information may correspond to an egress link identifier (ID), and the data packet can be sent to the next hop IAB base station through the egress link ID.
  • ID egress link identifier
  • the BAP entity Before the IAB donor base station sends data, the BAP entity will add the BAP address and PATH ID to the header of the BAP.
  • the IAB base station receives the data, it is compared with the BAP address assigned to itself. If the BAP address in the data is compared with its own BAP If the address is the same, it proves that the data is sent to itself, so submit it to the upper layer (such as the IP layer) and send it to the UE under the IAB base station after processing; if the BAP address in the data packet is different from its own BAP address, it proves The data is not sent to itself, and then it is sent to the next-hop IAB base station or IAB donor base station according to the BAP address and PATH ID in the data packet, or the data packet is discarded, and so on.
  • the current data transmission is mainly for unicast services, that is, a certain unicast transmission service
  • unicast services that is, a certain unicast transmission service
  • the data will only be sent to a certain terminal device, and if the multimedia broadcast multicast service (MBMS) service is introduced in the subsequent 5G communication, the MBMS service needs to be sent to multiple terminal devices at the same time.
  • MBMS multimedia broadcast multicast service
  • the subsequent communication system's handling of unicast services cannot complete the transmission of MBMS services. Therefore, how to perform MBMS service transmission in a relay communication system is a problem to be solved urgently.
  • an embodiment of the present application provides a data transmission method, which can be applied to the foregoing communication system.
  • the data transmission method will be described in detail below in conjunction with the IAB system in the above two-hop backhaul scenario.
  • the first network device can be the first relay node connected to the IAB donor in the above IAB system, such as IAB node 1, or the first network device can also be other relays in the IAB system.
  • a node such as IAB node i, where i is a positive integer greater than 1, or the first network device may also be the IAB node n connected to the UE in the IAB system, that is, the edge node; the second network device may be the first network device in the above IAB system.
  • the next hop network device of a network device for example, the first network device is IAB node1 and the second network device is IAB node 2, or the second network device can also be other relay nodes in the IAB system, such as IAB node i
  • the next hop node is not specifically limited.
  • the first network device is IAB node1 and the second network device is IAB node2 as an example.
  • the third network device may be the one in the above IAB system IAB donor.
  • FIG. 3 is a schematic flowchart of a configuration method in an embodiment of this application. As shown in FIG. 3, the method may include:
  • the IAB donor judges whether IAB node1 and/or IAB node2 are interested in the first MBMS service or whether it needs to receive data of the first MBMS service;
  • the MBMS service is a service for multiple UEs, such as a live broadcast service, some public safety services, and a batch software update service.
  • an IAB node if an IAB node is interested in the first MBMS service or needs to receive data of the first MBMS service, the IAB node can actively report the first service information to the IAB donor CU to inform the IAB donor CU
  • the IAB node is interested in the first MBMS service or needs to receive data of the first MBMS service.
  • the IAB node can also inform the IAB donor CU that it is interested in other MBMS services or needs to receive data from other MBMS services. That is to say, the IAB node can send the IAB donor CU at one time. Reporting one's own preference for MBMS services can also be reported once to IAB donor CU for one MBMS service, which is not specifically limited in the embodiment of this application.
  • the IAB node reports to the IAB donor.
  • the terminal equipment under the IAB node may report to the IAB donor, and the reported information is sent to the IAB donor through the IAB node, and the IAB node reports to the first MBMS service If you are interested or need to receive the data of the first MBMS service, it can be that the terminal equipment under the IAB node is interested in the first MBMS service or needs to receive the data of the first MBMS service, that is, the reporting process can be performed by the IAB node or the IAB node UE initiated.
  • the IAB donor CU may also issue a report request (for example, using a counting mechanism) to this IAB node to request the IAB node to report the above-mentioned first service information. After the IAB node receives the report request, Report the first business information to the IAB donor. As mentioned above, here it can be that the IAB donor CU can also issue a report request to the UE under this IAB node.
  • the IAB donor can determine that the UE under the IAB node or the author IAB node is interested in the first MBMS service or needs to receive data of the first MBMS service.
  • the core network device when it establishes or modifies a PDU session or quality of service (quality of service, QoS) flow, it may send the second service information to the IAB donor CU to inform the PDU session or QoS flow. It is used to transmit the MBMS service, then the IAB donor CU can determine that the IAB node or UE corresponding to the PDU session or QoS flow is interested in the MBMS service or needs to receive data of the MBMS service.
  • quality of service quality of service
  • the core network equipment can receive the UE’s service establishment request, thereby judging that the UE wants to receive the MBMS service; for the downlink service, the core network equipment can judge whether the downlink service is an MBMS service and according to the UE’s address information or The UE ID determines which UE the MBMS service is sent to.
  • the second service indication issued by the core network device may also be used to indicate which MBMS service the PDU session or QoS flow specifically transmits, for example, the PDU session or QoS flow is used to transmit the first MBMS service.
  • the IAB donor can determine whether IAB node1 and IAB node2 or the UEs below them are interested in the first MBMS service or need to receive data of the first MBMS service.
  • IAB node1 and IAB node2 or the UEs below them are interested in the first MBMS service or need to receive data of the first MBMS service, the IAB donor configures the second information for IAB node1 and IAB node2;
  • the second information may include: the routing address and/or the service identifier of the second MBMS service.
  • the routing address may include the BAP address allocated by the IAB donor for the IAB node or the first address allocated by the IAB donor for the IAB node to indicate the IAB node, which is not specifically limited.
  • the aforementioned routing address may correspond to the first MBMS service, that is, for different MBMS services, the IAB donor can configure different routing addresses for the MBMS service according to the requirements of the IAB node for the MBMS service. So that IAB node can adopt different processing strategies for different MBMS service data packets.
  • the routing address mentioned above may not be associated with the first MBMS service, it is only an address configured by the IAB donor to represent the IAB node, and the data of the first MBMS can be sent to the IAB node according to the routing address, and nothing is done. Specific restrictions.
  • the IAB donor can also configure multiple routing addresses for the IAB node, and each routing address is different Corresponding to the MBMS service, or the IAB donor can also configure a routing address for the IAB node, and the routing address corresponds to multiple MBMS services.
  • the IAB donor sends the second information to the corresponding IAB node respectively;
  • the second information is respectively sent to the corresponding IAB through the control signaling of the F1 interface or through the radio resource control (RRC) signaling. node.
  • RRC radio resource control
  • IAB donor has completed the configuration process of IAB node.
  • the IAB donor CU configures the IAB node and sends the configured second information to the IAB node.
  • the above-mentioned IAB system performs data transmission.
  • the following line transmission is taken as an example for description, and the uplink transmission process is similar.
  • FIG. 4 is a schematic diagram of the first flow of the data transmission method in the embodiment of this application. Referring to the solid line shown in FIG. 4, the method may include:
  • IAB donor CU receives the first data packet from the core network
  • the first data packet is a data packet of the first MBMS service.
  • the core network will configure corresponding indication information for each MBMS service.
  • the indication information may include at least one of the following: IPV6 flow label, differentiated services code point (DSCP) identifier, and destination IP Address, service identification of MBMS service.
  • DSCP differentiated services code point
  • the above-mentioned instruction information may also include other information, which is not specifically limited.
  • the above-mentioned indication information may be included in a data packet or carried in a separate control signaling.
  • the above-mentioned destination IP address may be a multicast IP address, that is, the same pair of IP addresses allocated by multiple IAB nodes, and the multicast IP address may be used for sending and receiving MBMS services.
  • the IAB donor CU sends the first data packet to the IAB donor DU;
  • the above indication information can be carried in the header of the first data packet and sent to the IAB donor DU.
  • it can also be sent by the IAB donor CU through independent control signaling, such as FI interface signaling.
  • IAB donor DU can also be sent by the IAB donor CU through independent control signaling, such as FI interface signaling.
  • IAB donor DU may also be used to send the above-mentioned instruction information, which is not specifically limited in the embodiment of the present application.
  • IAB donor DU configures the first information for the first data packet
  • the IAB donor CU may send to the IAB donor DU the mapping relationship between the above-mentioned indication information and routing information corresponding to different MBMS services in advance, that is to say, the IAB donor CU allocates the fifth information for different MBMS services.
  • the fifth information may include the routing address (such as the BAP address or the first address) and/or the service identifier of the MBMS service.
  • the first address is the address assigned by the IAB donor CU for the IAB node1 only to indicate the address of the IAB node1.
  • the IAB donor DU After the IAB donor DU receives the first data packet, it can be based on the first indication information corresponding to the first data packet or the first MBMS service and the above mapping relationship (the first indication information is the above indication corresponding to the first MBMS service) Information), determine the first information, and add the first information to the header of the first data packet (such as the BAP header). Specifically, the IAB donor DU queries according to the foregoing mapping relationship, and finds the first information corresponding to the first indication information, and then the IAB donor DU adds the first information to the header of the first data packet.
  • the first information may include the routing address of the first MBMS service (such as the BAP address or the second address) and/or the service identifier of the first MBMS service.
  • the IAB donor DU sends the first data packet carrying the first information to the IAB node 1;
  • the IAB donor CU can configure the mapping relationship between routing information and the next hop IAB node for the IAB donor DU, and the mapping relationship is used by the IAB donor DU to determine the next hop IAB node.
  • the IAB donor DU determines the first information, it can determine the next hop IAB node according to the first information and the mapping relationship.
  • the next hop IAB node continues to find the next hop IAB node according to the routing information configured by the IAB donor CU, and so on. After passing through several IAB nodes, the first data packet carrying the first information will arrive at IAB node 1.
  • IAB node 1 judges whether the first information carried in the first data packet matches its own second information; if yes, execute S406; if not, execute S407;
  • IAB node 1 compares the first information in the first data packet with its own second information, and judges whether the two match. For example, IAB node 1 compares the BAP address in the first data packet with the BAP address configured by IAB donor for IAB node 1 to see if the two match. Of course, it can also be understood as judging the BAP address in the first data packet and IAB donor is whether the BAP addresses configured by IAB node 1 are the same. If they match (consistent), perform S406, otherwise, perform S407; or, IAB node 1 can also change the service of the first MBMS service in the first data packet. The identifier is compared with the service identifier of the second MBMS service configured by IAB donor for IAB node 1 to see if the two match. If they match (consistent), S406 is executed, otherwise, S407 is executed.
  • IAB node 1 sends the first data packet to at least one UE under IAB node 1;
  • the steps performed by IAB node 1 can be performed by the BAP entity (BAP layer) in IAB node 1. Then, in S406, the BAP entity of IAB node 1 removes the first data packet.
  • the BAP packet header is transmitted to its own higher layer, such as the IP layer, which is further processed by the IP layer, such as IP filtering, reading the data packet information in the IP packet header, etc., and then the first data packet will be unicast or multicast It is sent to the UE under node 1 of IAB.
  • the IP address in the data packet may not match the IP address of some of the IAB nodes.
  • the data packet is likely to be discarded at the IP layer, so in order to avoid the data packet being discarded by the IAB node, then, when performing S406, the BAP entity can instruct the IP layer not to perform the first processing on the first data packet, so that the IP layer ignores the IP address The difference, which in turn enables the IAB node to send the first data packet to the UE instead of discarding it due to an IP address mismatch.
  • the above-mentioned first processing may include: filtering the first data packet or discarding the first data packet according to the IP address carried in the first data packet, that is, the BAP entity may send the second data packet to the IP layer.
  • the second indication information may indicate that the IP layer does not perform IP address filtering on the first data packet or does not discard the first data packet.
  • the IAB donor can also configure at least one IP address for the IAB node. Then, when S406 is executed, if the IP address of the first data packet is the same as the above at least one IP address If they do not match, IAB node can also modify the IP address of the first data packet to the first IP address in at least one IP address, so that when the IP layer is performing processing, because the IP addresses match, the first IP address will not be discarded. One packet.
  • the BAP entity may also use other methods to prevent the first data packet from being discarded by the IAB node 1, which is not specifically limited.
  • the IAB donor can also configure one or more multicast IP addresses (fourth information) corresponding to the MBMS service for IAB node 1, then, in the BAP of IAB node 1,
  • the entity can send the first data packet to the IP layer, and the IP layer filters the destination IP address (multicast IP address) carried in the first data packet and one or more multicast IP addresses configured for IAB node 1, if If there is a matching multicast IP address, the IP layer considers the first data packet to be the data packet that it needs to receive, and sends the first data packet to the UE. On the contrary, the IP layer believes that the first data packet is not that it needs to receive. Data packet, the first data packet can be discarded.
  • IAB node 1 sends the first data packet to N next hop IAB nodes (ie, IAB node 2).
  • IAB node 1 determines through S405 that the first information and the second information do not match, it can determine that the first data packet is not a data packet sent to itself or the UE under it. Then, IAB node1 needs to send the first data packet It is forwarded to the next hop IAB node, but not sent to the UE that accesses IAB node 1.
  • IAB node 1 can be connected to N IAB node 2, and N is a positive integer. Then, IAB node 1 will forward the first data packet to the next hop IAB node after determining that the first data packet is not the data packet sent to itself At this time, IAB node 1 needs to determine the next hop IAB node. Since the above IAB system is an IAB system in a two-hop backhaul scenario, then, for IAB node 1, N IAB node 2 are all its next hop IAB nodes, then IAB node 1 sends the first data packet Sent to N IAB nodes 2.
  • N IAB nodes available in all the next hop IAB nodes of your own For example, IAB node 1 is connected to M IAB nodes 2, M If it is a positive integer greater than N, the IAB node 1 can determine the available N IAB nodes 2 among the M IAB nodes 2 as the next hop IAB node. Conversely, if the next hop IAB node of IAB node 1 is all unavailable, then IAB node 1 discards the first data packet.
  • the above “available” refers to reachability, that is, if a certain IAB node is available, it means that the IAB node can complete normal transmission, on the contrary, if a certain IAB node is unavailable Yes, it means that the IAB node may not be able to meet the transmission requirements due to poor wireless link quality, wireless link disconnection, or wireless link failure.
  • IAB node 1 after the execution of IAB node 1 after S405 determines that the first information and the second information do not match, it can further determine whether IAB node 1 has a next hop IAB node, and if IAB node 1 does not have a next hop IAB node. At this time, IAB node1 may be the most edge or last node in the IAB system. At this time, IAB node1 may discard the first data packet.
  • S407 may further include: IAB node 1 determines N next hop IAB nodes (IAB node 2) according to the first information;
  • IAB node 1 After determining to forward the first data packet to the next hop IAB node, it can also match the BAP address in the IAB node2 connected to itself according to the first information in the first data packet (such as the BAP address)
  • the N IAB node2 of the IAB is determined as the next hop IAB node, and the first data packet is sent to the N IAB node2.
  • the first information may also include the PATH ID
  • the IAB node 1 further determines the next hop IAB node according to the PATH ID.
  • IAB node 1 can determine the N IAB node2 that matches the BAP address and PATH ID in the first data packet among the IAB node2 connected to itself as the next hop IAB node, and send the first data packet to the N IAB nodes node 2.
  • data packets can be divided into two types: unicast service data packets and multicast service data packets, and the two service data packets use different data packet formats.
  • FIG. 5 is a schematic diagram of a BAP header format of a unicast service data packet in an embodiment of this application.
  • the format of the unicast service data packet is different from that of the multicast service data packet, so the T field is used to indicate whether the data packet is a unicast service data packet or a multicast service data packet.
  • the BAP address field can also be called the DESTINATION field.
  • Indicate the BAP address corresponding to the data packet the Data field is the load corresponding to the data packet (such as an IP packet), the D/C field is used to indicate whether the data packet is a control PDU or a data PDU, and the PATH ID field can also be called the PATH field , Used to indicate the path ID.
  • FIG 6 is a schematic diagram of a BAP header format of a multicast service data packet in an embodiment of this application. As shown in Figure 6, the difference from unicast service is that when the data packet is a multicast service data packet, the BAP address The domain is used to indicate the BAP address corresponding to the multicast service, which can be called BAP address M.
  • the overall configuration process and the processing complexity of each IAB base station are reduced, and at the same time, the header format of the MBMS service data packet is simplified, and the transmission overhead is reduced.
  • the IAB node 1 can also obtain third information, and the third information is used to indicate the mapping relationship between the PATH ID and the next hop IAB node. Further, the second information and the third information may also jointly indicate the mapping relationship between the routing address and the PATH and the next hop IAB node. In practical applications, the third information may be configured by the IAB donor for IAB node1 in the above configuration process, or it may be preset or created by the IAB node itself. IAB node 1 According to the third information, query N IAB nodes 2 that match the routing address in the first data packet and at least one PATH ID in the PATH ID, that is, the next hop IAB node, and send the first data packet to N IAB nodes 2.
  • the third information may include: the routing address (such as the BAP address), PATH ID, the routing address of the next hop IAB node (such as the BAP address), and the PATH ID corresponding to the MBMS service; or, the third information is also It can include: link identifier, which is the identifier of the egress link corresponding to the next hop IAB node.
  • the link identifier can be configured by IAB donor for IAB node1, or IAB node 1 according to IAB donor as
  • the routing address (such as BAP address), PATH ID, next hop IAB node's routing address (such as BAP address) and PATH ID corresponding to the MBMS service configured by IAB node1 are created by themselves.
  • the data packets in the above communication system can be divided into two types: unicast service data packets and multicast service data packets, two services Data packets share the same data packet format; the BAP headers of data packets of different multicast services carry the BAP address and/or PATH ID corresponding to each multicast service, while the BAP headers of data packets of different unicast services carry each destination IAB The BAP address and/or PATH ID corresponding to the node.
  • the BAP address corresponding to the IAB node is different on each IAB node, and can correspond to multiple unicast services, while the BAP address corresponding to the multicast service can be configured to multiple different IAB nodes at the same time, each BAP address Correspond to one type of multicast service or multiple types of multicast services.
  • Figure 7 is a schematic diagram of a BAP header format in an embodiment of this application. See Figure 7, where R (reserved) is a reserved field, and the BAP address field can also be called the DESTINATION field, indicating the BAP corresponding to the data packet Address, the Data field is the load corresponding to the data packet (for example, an IP packet), the D/C field is used to indicate whether the data packet is a control PDU or a data PDU, and the PATH ID field can also be called the PATH field, which is used to indicate the PATH ID.
  • R reserved
  • the BAP address field can also be called the DESTINATION field, indicating the BAP corresponding to the data packet Address
  • the Data field is the load corresponding to the data packet (for example, an IP packet)
  • the D/C field is used to indicate whether the data packet is a control PDU or a data PDU
  • the PATH ID field can also be called the PATH field, which is used to indicate the PATH ID.
  • the IAB donor configures the public routing address (such as the second information and the third information) corresponding to the MBMS service for the IAB node 1
  • the MBMS service data packet can be prevented from being transmitted through the redundant path, so that the entire transmission The process is simple and efficient.
  • IAB node1 when IAB node1 is looking for the next hop IAB node, it can also first query according to the third information whether there are N IAB nodes 2 that match the routing address with at least one PATH ID in the PATH ID (that is, the next One-hop IAB node), if yes, IAB node1 sends the first data packet to these N IAB nodes 2; if there is no routing address that matches at least one PATH ID, query whether there are N IAB node2 that match the routing address If yes, IAB node1 sends the first data packet to these N IAB nodes2; if there is neither a routing address matching nor at least one IAB node2 with a PATH ID matching, then IAB node1 can discard the first data packet Or send the first data packet to all IAB node 2 connected to IAB node 1, that is, all next hop IAB node of IAB node 1.
  • the first data packet can also be copied to obtain the original first data packet (that is, the first data packet from IAB donor). Data packets) including N first data packets, these N first data packets are exactly the same as the original first data packets. Then, the IAB node 1 sends the N first data packets to the N IAB nodes 2 respectively. Of course, the IAB node 1 can also send the first data packet from the IAB donor to N IAB nodes 2 through N transmissions.
  • the downlink MBMS service is transmitted in the IAB system.
  • IAB node 1 may also perform S408: A data packet is sent to at least one UE under IAB node1 and N IAB nodes2.
  • N IAB nodes 2 are the same as the N IAB nodes 2 in the foregoing embodiment, and will not be repeated here.
  • the IAB node 1 When the IAB node 1 determines that the first information of the first data packet matches its own second information, it can send the first data packet to the UE accessing the IAB node 1 and the N IAB nodes 2 at the same time. Specifically, IAB node 1 can copy the first data packet to obtain N+1 copies of the first data packet including the original first data packet (that is, the first data packet from the IAB donor). This N +1 of the first data packet is exactly the same as the original first data packet. Then, the IAB node 1 sends 1 of the N+1 first data packets to the UE and sends the other N first data packets to N IAB nodes 2 respectively. Of course, the IAB node 1 can also send the first data packet from the IAB donor to the UE and N IAB nodes 2 through N+1 transmissions.
  • FIG. 8 is a schematic diagram of the second flow of the data transmission method in the embodiment of the present application.
  • the method may include:
  • IAB donor CU receives the first data packet from the core network
  • IAB donor CU sends the first data packet to IAB donor DU;
  • IAB donor DU sends the first data packet to IAB node 1;
  • IAB node 1 sends the first data packet to N next hop IAB nodes (ie, IAB node 2).
  • the IAB donor CU does not need to configure the first information for the first data packet, but can directly send the first data packet to the IAB node 1, and the IAB node 1 forwards it to the N IAB nodes 2. That is, IAB node1 does not need to match the first information of the first data packet with the second information of IAB node1, but directly forwards the first data packet to N IAB node2.
  • the IAB donor does not need to configure an additional BAP address for the MBMS service.
  • the transmission of the MBMS service through the access link can reduce the load on the backhaul link.
  • a data transmission method is also provided, which can be applied to the above-mentioned IAB system.
  • FIG. 9 is a schematic diagram of a third process flow of the data transmission method in an embodiment of the application. Referring to FIG. 9, the method may include:
  • IAB donor CU receives the second data packet from the core network
  • the second data packet is a data packet of the third MBMS service, and the second data packet may be the same as or different from the first data packet.
  • the IAB donor CU sends the second data packet to the IAB donor DU;
  • IAB donor DU sends the second data packet to IAB node 1MT in a unicast or multicast manner
  • IAB node 1 MT sends the first data packet to IAB node 1 DU;
  • the IAB node 1 DU sends the second data packet to the UE and/or the IAB node 2 MT in a unicast or multicast manner.
  • the above S901 to S905 may be: IAB donor or the previous hop IAB node sends the second data packet of the third MBMS service to at least one UE under itself and the first level IAB node (such as IAB node) through unicast or multicast. node1). After the first-level IAB node receives the second data packet, it can also send it to at least the UE and the second-level IAB base station (such as IAB node2) under it through unicast or multicast.
  • the IAB node After the IAB node receives the second data packet from the upper-level IAB node in unicast or multicast mode, it can pass through the physical (PHY) layer and the media access control (MAC) layer of the IAB node MT. After processing, it is processed by the MAC layer and PHY layer in the IAB node DU and sent out; it can also be processed by the PHY layer, MAC layer, and radio link control (RLC) layer in the IAB node MT, and then passed through the IAB node DU. The RLC layer, MAC layer, and PHY layer are processed and sent out. Of course, they can also be sent out through the PDCP layer processing in the two modules.
  • PHY physical
  • MAC media access control
  • RLC radio link control
  • sending by multicast transmission in the above S905 means: when the IAB donor CU or the previous hop IAB node DU sends the TB corresponding to the PDU session, it uses G-RNTI to scramble the PDU, or to The DCI corresponding to the PDU is scrambled, and one or more IAB nodes or UEs receive the same PDU according to the same G-RNTI; or IAB donor CU or IAB node DU informs multiple IAB nodes MT of the same PDU in a semi-static manner In the time domain or frequency domain, multiple IAB node MTs or UEs can receive the PDU at the same time; alternatively, IAB donor CU or IAB node DU transmits in the radio bearer established for multicast transmission or is specifically designed for multicast The PDU is transmitted in a channel (such as MCCH/MTCH channel).
  • a channel such as MCCH/MTCH channel
  • the reception by multicast in the above S903 means that when the IAB donor CU or the previous hop IAB node DU is sent in the multicast mode, one of the multiple IAB nodes or MTs or UEs responds to the PDU according to the G-RNTI.
  • Receiving; or, one of multiple IAB nodes, MTs or UEs receives PDUs through a radio bearer established for multicast transmission or receives PDUs on a channel used for multicast transmission.
  • the IAB donor needs to send the multicast configuration information sent by the upper-level IAB node to the IAB node.
  • the configuration information may include information such as the G-RNTI corresponding to the third MBMS service, the time-domain location information for receiving the second data packet, and the frequency-domain location information for receiving the second data packet, and may also include For example, information such as the physical channel, the transmission channel, and the logical channel of the third MBMS service is received, which is not specifically limited in the embodiment of the present application.
  • the above configuration information can be sent by the IAB donor to the IAB node through F1 interface control signaling or sent to the IAB node through RRC signaling.
  • the IAB node can also receive the second data packet from the upper-level IAB node through unicast, and then send the second data packet to the next-level IAB node through multicast; or, IAB The node may receive the second data packet from the upper-level IAB node in a multicast manner, and then send the second data packet to the lower-level IAB node in a unicast manner, which is not specifically limited in the embodiment of the present application.
  • the embodiments shown in FIGS. 4 to 8 above are all sending MBMS service data packets through the backhaul link, while the embodiment shown in FIG. 9 is essentially through the access link.
  • these two sending methods can be performed independently of each other, that is, you can choose one of them, or the IAB donor can instruct the IAB node to use which method to transmit the MBMS service data packets.
  • the IAB donor does not need to configure an additional BAP address for the MBMS service, and the transmission of the MBMS service through the access link can reduce the load on the backhaul link.
  • an embodiment of the present application provides a communication device.
  • the communication device may be a data transmission device or a chip or a system-on-chip in the data transmission device, and may also be a data transmission device used to implement the IAB in the appeal embodiment
  • the function module of the method executed by node 1, and the function can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • FIG. 10 is a schematic diagram of the first structure of a communication device in an embodiment of this application. As shown in FIG.
  • the communication device 100 may include: a first receiving module 101 for receiving a first data packet,
  • the first data packet is a data packet of the first MBMS service, and the first data packet carries first information;
  • the first sending module 102 is configured to send the first information if the second information of the first network device matches the first information
  • a data packet is sent to a terminal device that accesses the first network device, and the second information is pre-configured for the first network device.
  • the first sending module is further configured to send the first data packet to N second network devices if the second information of the first network device matches the first information, where N is a positive integer .
  • the first sending module is further configured to obtain N+1 copies of the first data packet according to the first data packet; and send the N+1 copies of the first data packet to the terminal device and the Nth data packet respectively.
  • the apparatus further includes: a second sending module 103 for sending the first data packet if the second information of the first network device does not match the first information
  • N is a positive integer.
  • the second sending module is further configured to obtain N copies of the first data packet according to the first data packet; and respectively send the N copies of the first data packet to N second network devices.
  • the second sending module is further configured to discard the first network device if the second information of the first network device does not match the first information, and the next hop network device of the first network device is unavailable. data pack.
  • the N second network devices are all next-hop network devices of the first network device.
  • the first information includes: the routing address corresponding to the first MBMS service and/or the service identifier of the first MBMS service; the second information includes: the routing address and/or the first network device configured for the first network device 2.
  • the service identifier of the MBMS service includes: the routing address corresponding to the first MBMS service and/or the service identifier of the first MBMS service.
  • the apparatus further includes: a first processing module 104, configured to determine N second network devices according to the first information; or, the first information further includes: a path identifier (PATH ID); the first processing module is also used to determine N second network devices according to the path identifier.
  • a first processing module 104 configured to determine N second network devices according to the first information
  • the first information further includes: a path identifier (PATH ID); the first processing module is also used to determine N second network devices according to the path identifier.
  • PATH ID path identifier
  • the first processing module is also used for the first network device to obtain third information, and the third information is used to indicate the mapping relationship between the path identifier and the second network device; according to the path identifier and the third Information, determine N second network devices.
  • the first sending module is specifically configured to instruct the IP layer not to perform first processing on the first data packet before sending the first data packet to the terminal device, and the first processing includes according to the first data packet
  • the carried IP address filters the first data packet or discards the first data packet; or, modify the IP address of the first data packet to the first IP address, which is the IP address pre-configured for the first network device .
  • the first sending module is also used to obtain fourth information.
  • the fourth information includes a multicast IP address configured for the first network device; the first data packet is sent to the terminal according to the multicast IP address equipment.
  • the embodiments of the present application provide a communication device.
  • the communication device may be a data transmission device or a chip or a system on a chip in the data transmission device, and may also be a data transmission device used to implement the IAB in the foregoing embodiment
  • the function module of the method executed by the donor, the function can be realized by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • FIG. 11 is a schematic diagram of a second structure of a communication device in an embodiment of this application.
  • the communication device 110 includes: a second processing module 111, which is configured to provide the first MBMS service for the first MBMS service.
  • the third sending module 112 is used to send the first data packet to the first network device, the first data packet carries the first information, and the first information is used to trigger the first network device Perform at least one of the following operations: send a first data packet to a terminal device connected to the first network device, send a first data packet to N second network devices, and discard the first data packet.
  • the second processing module is further configured to configure second information for the first network device, and the second information corresponds to the second MBMS service.
  • the second information includes: a routing address configured for the first network device and/or a service identifier of the second MBMS service.
  • the first information includes: a routing address corresponding to the first MBMS service and/or a service identifier corresponding to the first MBMS service.
  • the first information further includes: the path identifier corresponding to the first MBMS service; the second processing module is also used to configure third information for the first network device, and the third information is used to indicate the path identifier and The mapping relationship between the second network devices.
  • the second processing module is further configured to configure fourth information for the first network device.
  • the fourth information includes a multicast IP address corresponding to the first MBMS service, and the multicast IP address is used to indicate the first network device.
  • a network device sends the first data packet to the terminal device.
  • the embodiments of the present application provide a communication device.
  • the communication device may be a data transmission device or a chip or a system on a chip in the data transmission device, and may also be a data transmission device used to implement the IAB in the foregoing embodiment
  • the function module of the method executed by node 1, and the function can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • FIG. 12 is a schematic diagram of a third structure of a communication device in an embodiment of this application. As shown in FIG.
  • the communication device 120 includes a second receiving module 121, which is used for unicast or multicast
  • the second data packet sent by the fourth network device is received by the fourth network device, the second data packet is a data packet of the third multimedia broadcast multicast service MBMS service; the fourth sending module 122 is used to send the second data packet in unicast or The multicast is sent to the terminal device accessing the first network device and/or the second network device.
  • the fourth sending module is specifically configured to obtain configuration information corresponding to the second data packet; and receive the second data packet according to the configuration information.
  • the configuration information includes at least one of the following: G-RNTI corresponding to the third MBMS service, time domain location information for receiving the second data packet, and frequency domain location information for receiving the second data packet.
  • an embodiment of the present application provides a network device, including: a processor and a memory; the processor is coupled to the memory, and the processor is configured to read and execute instructions in the memory to implement the first aspect as described above , The third aspect and the data transmission method in each possible implementation manner.
  • an embodiment of the present application provides a network device, including: a processor and a memory; the processor is coupled to the memory, and the processor is configured to read and execute instructions in the memory to implement the second aspect as described above And the data transmission methods in its possible implementations.
  • the embodiments of the present application provide a computer-readable storage medium.
  • the computer-readable storage medium stores instructions. When the instructions run on a computer, they are used to execute the data in any one of the first to third aspects above. Transmission method.
  • the embodiments of the present application provide a computer program or computer program product.
  • the computer program or computer program product When executed on a computer, the computer realizes any one of the first aspect and/or the third aspect. Data transfer method.
  • the computer-readable medium may include a computer-readable storage medium, which corresponds to a tangible medium, such as a data storage medium, or a communication medium that includes any medium that facilitates the transfer of a computer program from one place to another (for example, according to a communication protocol) .
  • a computer-readable medium may generally correspond to (1) a non-transitory tangible computer-readable storage medium, or (2) a communication medium, such as a signal or carrier wave.
  • Data storage media may be any available media that can be accessed by one or more computers or one or more processors to retrieve instructions, codes, and/or data structures for implementing the techniques described in this application.
  • the computer program product may include a computer-readable medium.
  • such computer-readable storage media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage devices, magnetic disk storage devices or other magnetic storage devices, flash memory, or structures that can be used to store instructions or data Any other media that can be accessed by the computer in the form of desired program code. And, any connection is properly termed a computer-readable medium.
  • any connection is properly termed a computer-readable medium.
  • coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave to transmit instructions from a website, server, or other remote source
  • coaxial cable Wire, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of media.
  • the computer-readable storage media and data storage media do not include connections, carrier waves, signals, or other temporary media, but are actually directed to non-transitory tangible storage media.
  • magnetic disks and optical disks include compact disks (CDs), laser disks, optical disks, digital versatile disks (DVD) and Blu-ray disks, where disks usually reproduce data magnetically, while optical disks use lasers to reproduce data optically data. Combinations of the above should also be included in the scope of computer-readable media.
  • DSP digital signal processors
  • ASIC application-specific integrated circuits
  • FPGA field programmable logic arrays
  • DSP digital signal processors
  • ASSIC application-specific integrated circuits
  • FPGA field programmable logic arrays
  • DSP digital signal processors
  • ASIC application-specific integrated circuits
  • FPGA field programmable logic arrays
  • processor may refer to any of the foregoing structure or any other structure suitable for implementing the techniques described herein.
  • the functions described by the various illustrative logical blocks, modules, and steps described herein may be provided in dedicated hardware and/or software modules configured for encoding and decoding, or combined Into the combined codec.
  • the technology may be fully implemented in one or more circuits or logic elements.
  • the technology of this application can be implemented in a variety of devices or devices, including wireless handsets, integrated circuits (ICs), or a set of ICs (for example, chipsets).
  • ICs integrated circuits
  • a set of ICs for example, chipsets.
  • Various components, modules, or units are described in this application to emphasize the functional aspects of the device for implementing the disclosed technology, but they do not necessarily need to be implemented by different hardware units.
  • various units can be combined with appropriate software and/or firmware in the codec hardware unit, or by interoperating hardware units (including one or more processors as described above). supply.

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Abstract

本申请提供一种数据传输方法、装置及设备，该方法可以应用于中继通信系统中。该方法包括：第一网络设备接收第一数据包，所述第一数据包为第一多媒体广播组播业务MBMS业务的数据包，所述第一数据包携带有第一信息；如果所述第一网络设备的第二信息与所述第一信息相匹配，则所述第一网络设备将所述第一数据包发送给接入所述第一网络设备的终端设备，所述第二信息是为所述第一网络设备预先配置的，如此，在中继通信系统中实现MBMS业务的传输。

Description

一种数据传输方法、装置及设备
本申请要求在2020年4月30日提交中国专利局、申请号为202010368405.6、发明名称为“一种数据传输方法、装置及设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信技术领域，特别涉及一种数据传输方法、装置及设备。
背景技术
在5G(第五代移动通信技术)中，为了应对未来爆炸性的移动数据流量增长和海量的设备连接，满足不断涌现的各类新业务和应用场景，基站(gNB)可以采用控集中式节点-分布式节点(centralized unit-distributed unit，CU-DU)分离的架构，即：一个gNB可以由一个CU和一个或者多个DU组成，其中，CU和DU通过F1接口相连，CU和核心网(5GC)通过NG接口相连。UE通过DU接入CU。
对于具有中继功能的通信系统，如集中接入回传(integrated access and backhaul，IAB)系统来说，目前的数据传输主要针对单播业务，即某单播传输业务的数据只会发送给某一个终端设备，而如果在后续的5G通信中引入多媒体广播组播业务(multimedia broadcast multicast service，MBMS)业务的话，由于MBMS业务需要同时发送给多个终端设备，当前中继通信系统对于单播业务的处理方式无法完成针对MBMS业务的传输。所以，如何在中继通信系统中进行MBMS业务的传输是一个亟待解决的问题。
发明内容
本申请提供了一种数据传输方法、装置及设备，以在中继通信系统中实现MBMS业务的传输。
第一方面，本申请提供一种数据传输方法，可以应用于第一网络设备，第一网络设备可以为中继通信系统中的中继节点，如IAB系统中的IAB节点(node)。第一网络设备(IAB node)接收第一数据包，该第一数据包可以是来自IAB系统中的第三网络设备，如IAB宿主节点(donor)或者第一网络设备的上一跳网络设备。第一网络设备将第一数据包中的第一信息与自身的第二信息进行匹配，如果两者相匹配，则第一网络设备将第一数据包发送给接入第一网络设备的UE。
在本申请中，第一数据包为第一多媒体广播组播业务(multimedia broadcast multicast service，MBMS)业务的数据包，第一数据包携带有第一信息，第一信息与第一MBMS业 务对应；第一信息可以包括第一MBMS业务的路由地址和/或第一MBMS业务的业务标识。
可选的，第二信息是由IAB宿主节点(donor)为第一网络设备针对第一MBMS业务配置的，第二信息可以包括路由地址和/或第二MBMS业务的业务标识。
在本申请中，第一网络设备将自身的第二信息与第一数据包携带的第一信息进行匹配，如果两者一致，第一网络设备可以认为第一数据包为自身需要接收的数据，那么，第一网络设备可以将第一数据包发送给自身下面的UE，如此，实现在中继通信系统中传输MBMS业务。
基于第一方面，在一些可能的实施方式中，如果第一网络设备的第二信息与第一信息相匹配，上述方法还包括：第一网络设备将第一数据包发送给N个第二网络设备，N为正整数。
在本申请中，当第一网络设备的第二信息与第一数据包的第一信息相匹配时，第一网络设备除了将第一数据包发送给接入自身的UE之外，还将第一数据包发送给N个第二网络设备。这里，N个第二网络设备可以为上述中继通信系统中第一网络设备的下一跳网络设备。
基于第一方面，在一些可能的实施方式中，方法还包括：第一网络设备根据第一数据包，获得N+1份第一数据包；第一网络设备将N+1份第一数据包分别发送给终端设备以及N个第二网络设备。
基于第一方面，在一些可能的实施方式中，上述方法还包括：如果第一网络设备的第二信息与第一信息不匹配，则第一网络设备将第一数据包发送给N个第二网络设备，N为正整数。
在本申请中，当第一网络设备的第二信息与第一数据包的第一信息不匹配时，第一网络设备除了将第一数据包发送给自身下面的UE之外，由于第一数据包为第一MBMS业务的数据，也就是说还存在其他IAB node也需要接收组播数据，那么，第一网络设备还可以将第一数据包发送给N个第二网络设备，如此，实现在IAB系统中传输MBMS业务。
基于第一方面，在一些可能的实施方式中，第一网络设备将第一数据包发送给N个第二网络设备，包括：第一网络设备根据第一数据包，获得N份第一数据包；第一网络设备将N份第一数据包分别发送给N个第二网络设备。
基于第一方面，在一些可能的实施方式中，如果第一网络设备的第二信息与第一信息不匹配，上述方法还包括：如果第一网络设备的下一跳网络设备不可用或者第一网络设备不存在下一跳网络设备，则第一网络设备丢弃第一数据包。
基于第一方面，在一些可能的实施方式中，上述N个第二网络设备为第一网络设备的所有下一跳网络设备。
进一步地，上述N个第二网络设备还可以为第一网络设备的所有可用的下一跳网络设 备。
基于第一方面，在一些可能的实施方式中，第一信息可以包括：第一MBMS业务对应的路由地址和/或第一MBMS业务的业务标识；第二信息可以包括：为第一网络设备配置的路由地址和/或第二MBMS业务的业务标识。
在本申请中，为第一网络设备配置的路由地址可以与第二MBMS业务对应，第二MBMS业务可以为第一MBMS业务，也可以为其他MBMS业务。
基于第一方面，在一些可能的实施方式中，方法还包括：第一网络设备根据第一信息，确定N个第二网络设备；或者，第一信息还包括：路径标识(PATH ID)；上述方法还包括：第一网络设备根据路径标识，确定N个第二网络设备。
基于第一方面，在一些可能的实施方式中，上述方法还包括：第一网络设备获得第三信息，第三信息用于表示路径标识与第二网络设备之间的映射关系；第一网络设备根据路径标识，确定N个第二网络设备，包括：第一网络设备根据路径标识以及第三信息，确定N个第二网络设备。
基于第一方面，在一些可能的实施方式中，在第一网络设备将第一数据包发送给终端设备之前，方法还包括：第一网络设备指示IP层不对第一数据包进行第一处理，第一处理包括根据第一数据包携带的IP地址对第一数据包进行筛选或者丢弃第一数据包；或者，第一网络设备将第一数据包的IP地址修改为第一IP地址，第一IP地址是为第一网络设备预先配置的IP地址。
这里，第一网络设备的回传适配协议层(backhaul adaption protocol，BAP)实体(BAP层)向IP层进行指示，指示IP层不丢弃第一数据包，即指示IP层不根据第一数据包携带的IP地址对第一数据包进行筛选或者丢弃第一数据包。或者，BAP实体还可以将第一数据包的IP地址修改为第一网络设备的第一IP地址。
基于第一方面，在一些可能的实施方式中，第一网络设备将第一数据包发送给终端设备，包括：第一网络设备获得第四信息，第四信息包括为第一网络设备配置的组播IP地址；第一网络设备根据组播IP地址将第一数据包发送给终端设备。
第二方面，本申请还提供一种数据传输方法，可以应用于第三网络设备，第三网络设备可以为上述中继通信系统中的宿主节点，如IAB系统中的IAB donor。该方法包括：第三网络设备为第一MBMS业务的第一数据包配置对应的第一信息；第三网络设备将第一数据包发送给第一网络设备，第一数据包携带有第一信息，第一信息用于触发第一网络设备执行如下至少一种操作：向接入第一网络设备的终端设备发送第一数据包，向N个第二网络设备发送第一数据包，丢弃第一数据包。
基于第二方面，在一些可能的实施方式中，方法还包括：第三网络设备为第一网络设备配置第二信息，第二信息与第二MBMS业务对应。
基于第二方面，在一些可能的实施方式中，第二信息包括：为第一网络设备配置的路由地址和/或第二MBMS业务的业务标识。
基于第二方面，在一些可能的实施方式中，第一信息包括：第一MBMS业务对应的路由地址和/或第一MBMS业务对应的业务标识。
基于第二方面，在一些可能的实施方式中，第一信息还包括：第一MBMS业务对应的路径标识；方法还包括：第三网络设备为第一网络设备配置第三信息，第三信息用于表示路径标识与第二网络设备之间的映射关系。
基于第二方面，在一些可能的实施方式中，方法还包括：第三网络设备为第一网络设备配置第四信息，第四信息包括与第一MBMS业务对应的组播IP地址，组播IP地址用于指示第一网络设备发送第一数据包给终端设备。
第三方面，本申请还提供一种数据传输方法，可以应用于第一网络设备，第一网络设备可以为中继通信系统中的中继节点，如IAB系统中的IAB node。该方法包括：第一网络设备以单播或组播的方式接收第四网络设备发送的第二数据包，第二数据包为第三MBMS业务的数据包；第一网络设备将第二数据包以单播或组播的方式发送给接入第一网络设备的终端设备和/或第二网络设备。
基于第三方面，在一些可能的实施方式中，第一网络设备以组播的方式接收第四网络设备发送的第二数据包，包括：第一网络设备获得第二数据包对应的配置信息；第一网络设备根据配置信息，接收第二数据包。
基于第三方面，在一些可能的实施方式中，配置信息包括以下至少一种：第三MBMS业务对应的分组无线网络临时标识G-RNTI、接收第二数据包的时域位置信息、接收第二数据包的频域位置信息。
第四方面，本申请提供一种通信装置，该通信装置可以为数据传输装置或者数据传输装置中的芯片或者片上系统，还可以为数据传输装置中用于实现第一方面或第一方面的任一可能的实施方式所述的方法的功能模块。该通信装置可以实现上述第一方面、第二方面或者其可能的实施方式中第一网络设备所执行的功能，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。举例来说，该通信装置，可以包括：第一接收模块，用于接收第一数据包，第一数据包为第一MBMS业务的数据包，第一数据包携带有第一信息；第一发送模块，用于如果第一网络设备的第二信息与第一信息相匹配，则将第一数据包发送给接入第一网络设备的终端设备，第二信息是为第一网络设备预先配置的。
基于第四方面，在一些可能的实施方式中，第一发送模块，还用于如果第一网络设备的第二信息与第一信息相匹配，将第一数据包发送给N个第二网络设备，N为正整数。
基于第四方面，在一些可能的实施方式中，第一发送模块，还用于根据第一数据包， 获得N+1份第一数据包；将N+1份第一数据包分别发送给终端设备以及N个第二网络设备。
基于第四方面，在一些可能的实施方式中，装置还包括：第二发送模块，用于如果第一网络设备的第二信息与第一信息不匹配，则将第一数据包发送给N个第二网络设备，N为正整数。
基于第四方面，在一些可能的实施方式中，第二发送模块，还用于根据第一数据包，获得N份第一数据包；将N份第一数据包分别发送给N个第二网络设备。
基于第四方面，在一些可能的实施方式中，第二发送模块，还用于如果第一网络设备的第二信息与第一信息不匹配，且第一网络设备的下一跳网络设备不可用，则丢弃第一数据包。
基于第四方面，在一些可能的实施方式中，N个第二网络设备为第一网络设备的所有下一跳网络设备。
基于第四方面，在一些可能的实施方式中，第一信息包括：第一MBMS业务对应的路由地址和/或第一MBMS业务的业务标识；第二信息包括：为第一网络设备配置的路由地址和/或第二MBMS业务的业务标识。
基于第四方面，在一些可能的实施方式中，装置还包括：第一处理模块，用于根据第一信息，确定N个第二网络设备；或者，第一信息还包括：路径标识(PATH ID)；第一处理模块，还用于根据路径标识，确定N个第二网络设备。
基于第四方面，在一些可能的实施方式中，第一处理模块，还用于第一网络设备获得第三信息，第三信息用于表示路径标识与第二网络设备之间的映射关系；根据路径标识以及第三信息，确定N个第二网络设备。
基于第四方面，在一些可能的实施方式中，第一发送模块，具体用于在将第一数据包发送给终端设备之前，指示IP层不对第一数据包进行第一处理，第一处理包括根据第一数据包携带的IP地址对第一数据包进行筛选或者丢弃第一数据包；或者，将第一数据包的IP地址修改为第一IP地址，第一IP地址是为第一网络设备预先配置的IP地址。
基于第四方面，在一些可能的实施方式中，第一发送模块，还用于获得第四信息，第四信息包括为第一网络设备配置的组播IP地址；根据组播IP地址将第一数据包发送给终端设备。
第五方面，本申请提供一种通信装置，该通信装置可以为数据传输装置或者数据传输装置中的芯片或者片上系统，还可以为数据传输装置中用于实现第二方面或第二方面的任一可能的实施方式所述的方法的功能模块。该通信装置可以实现上述各方面或者各可能的实施方式中第三网络设备所执行的功能，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。举例来说，该通信装置，包括：第二 处理模块，用于为第一MBMS业务的第一数据包配置对应的第一信息；第三发送模块，用于将第一数据包发送给第一网络设备，第一数据包携带有第一信息，第一信息用于触发第一网络设备执行如下至少一种操作：向接入第一网络设备的终端设备发送第一数据包，向N个第二网络设备发送第一数据包，丢弃第一数据包。
基于第五方面，在一些可能的实施方式中，第二处理模块，还用于为第一网络设备配置第二信息，第二信息与第二MBMS业务对应。
基于第五方面，在一些可能的实施方式中，第二信息包括：为第一网络设备配置的路由地址和/或第二MBMS业务的业务标识。
基于第五方面，在一些可能的实施方式中，第一信息包括：第一MBMS业务对应的路由地址和/或第一MBMS业务对应的业务标识。
基于第五方面，在一些可能的实施方式中，第一信息还包括：第一MBMS业务对应的路径标识；第二处理模块，还用于为第一网络设备配置第三信息，第三信息用于表示路径标识与第二网络设备之间的映射关系。
基于第五方面，在一些可能的实施方式中，第二处理模块，还用于为第一网络设备配置第四信息，第四信息包括与第一MBMS业务对应的组播IP地址，组播IP地址用于指示第一网络设备发送第一数据包给终端设备。
第六方面，本申请提供一种通信装置，该通信装置可以为数据传输装置或者数据传输装置中的芯片或者片上系统，还可以为数据传输装置中用于实现第三方面或第三方面的任一可能的实施方式所述的方法的功能模块。该通信装置可以实现上述三方面或者各可能的实施方式中第一网络设备所执行的功能，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。举例来说，该通信装置，包括：第二接收模块，用于以单播或组播的方式接收第四网络设备发送的第二数据包，第二数据包为第三多媒体广播组播业务MBMS业务的数据包；第四发送模块，用于将第二数据包以单播或组播的方式发送给接入第一网络设备的终端设备和/或第二网络设备。
基于第六方面，在一些可能的实施方式中，第四发送模块，具体用于获得第二数据包对应的配置信息；根据配置信息，接收第二数据包。
基于第六方面，在一些可能的实施方式中，配置信息包括以下至少一种：第三MBMS业务对应的分组无线网络临时标识G-RNTI、接收第二数据包的时域位置信息、接收第二数据包的频域位置信息。
第七方面，本申请提供一种网络设备，包括：处理器和存储器；处理器与存储器耦合，处理器被配置为读取并执行存储器中的指令，以实现如上述第一方面、第三方面及其各可能的实施方式中的数据传输方法。
第八方面，本申请提供一种网络设备，包括：处理器和存储器；处理器与存储器耦合， 处理器被配置为读取并执行存储器中的指令，以实现如上述第二方面及其各可能的实施方式中的数据传输方法。
第九方面，本申请提供一种计算机可读存储介质，计算机可读存储介质存储有指令，当指令在计算机上运行时，用于执行上述第一至三方面中任一的数据传输方法。
第十方面，本申请提供一种计算机程序或计算机程序产品，当计算机程序或计算机程序产品在计算机上被执行时，使得计算机实现上述第一方面和/或第三方面中任一的数据传输方法。
第十一方面，本申请提供一种通信系统，包括IAB donor、IAB node和UE；其中，IAB donor，用于执行上述第二方面中任一的数据传输方法；IAB node，用于执行上述第一方面和/或第三方面中任一的数据传输方法。
可选的，该通信系统可以是IAB系统。
应当理解的是，本申请的第四至十一方面与本申请的第一至三方面的技术方案一致，各方面及对应的可行实施方式所取得的有益效果相似，不再赘述。
附图说明
为了更清楚地说明本申请实施例或背景技术中的技术方案，下面将对本申请实施例或背景技术中所需要使用的附图进行说明。
图1为本申请实施例中的通信系统的结构示意图；
图2为本申请实施例中的通信系统的用户面的协议栈结构示意图；
图3为本申请实施例中的配置方法的流程示意图；
图4为本申请实施例中的数据传输方法的第一种流程示意图；
图5为本申请实施例中的一种单播业务数据包BAP包头格式的示意图；
图6为本申请实施例中的一种组播业务数据包BAP包头格式的示意图；
图7为本申请实施例中的一种BAP包头格式的示意图；
图8为本申请实施例中的数据传输方法的第二种流程示意图；
图9为本申请实施例中的数据传输方法的第三种流程示意图；
图10为本申请实施例中的通信装置的一种结构示意图；
图11为本申请实施例中的通信装置的第二种结构示意图；
图12为本申请实施例中的通信设备的第三种结构示意图。
具体实施方式
下面结合本申请实施例中的附图对本申请实施例进行描述。以下描述中，参考形成本申请一部分并以说明之方式示出本申请实施例的具体方面或可使用本申请实施例的具体 方面的附图。应理解，本申请实施例可在其它方面中使用，并可包括附图中未描绘的结构或逻辑变化。例如，应理解，结合所描述方法的揭示内容可以同样适用于用于执行所述方法的对应设备或系统，且反之亦然。例如，如果描述一个或多个具体方法步骤，则对应的设备可以包含如功能单元等一个或多个单元，来执行所描述的一个或多个方法步骤(例如，一个单元执行一个或多个步骤，或多个单元，其中每个都执行多个步骤中的一个或多个)，即使附图中未明确描述或说明这种一个或多个单元。另一方面，例如，如果基于如功能单元等一个或多个单元描述具体装置，则对应的方法可以包含一个步骤来执行一个或多个单元的功能性(例如，一个步骤执行一个或多个单元的功能性，或多个步骤，其中每个执行多个单元中一个或多个单元的功能性)，即使附图中未明确描述或说明这种一个或多个步骤。进一步，应理解的是，除非另外明确提出，本文中所描述的各示例性实施例和/或方面的特征可以相互组合。
为了便于理解本申请，首先对本申请实施例中涉及的概念进行解释：
单播(unicast)：点对点的通信技术，即网络设备与终端设备之间的单点通信，网络设备可以针对每个终端设备单独发送数据。单播也可以称为单播传输方式或者单播传输技术。
通过单播传输方式发送是指：发送装置发送协议数据单元(protocol data unit，PDU)对应的传输块(transport block，TB)时，采用小区无线网络临时标识(cell network temporary identifier，C-RNTI)对PDU进行加扰，或对PDU对应的下行控制信息(downlink control information，DCI)进行加扰，一个接收装置根据C-RNTI对同一PDU进行接收；或者采用单播的方式传输PDU可以指该PDU在为单播传输建立的无线承载中传输或者在专门为单播设计的信道中进行传输。
采用单播传输方式接收是指采用单播方式发送的时候，上述接收装置根据C-RNTI对PDU进行接收；或者上述接收装置通过为单播传输建立的无线承载接收或者在用于单播传输的信道上进行接收。
多播(multicast)：点到多点的通信技术，也可以称为多播传输方式或者多播传输技术，用来为多媒体广播多播业务服务。多播也可以称为组播，在某些广义的场景中也可以称为一种广播技术，但是多播与传统意义的广播技术存在差异。在采用多播传输方式时，针对同一数据，网络设备(例如基站)发送的过程中有多个终端设备同时进行接收。目前多播传输技术主要分为两种：多媒体广播多播单频网络业务(multimedia broadcast multicast service single frequency network，MBSFN)和单小区点到多点业务(single cell point to multipoint，SC-PTM)。除此之外，其他多播传输技术也属于本申请实施例范围内，对此不作限定。
通过多播传输方式发送是指：发送装置发送PDU对应的TB时，采用分组无线网络临 时标识(group radio network temporary identifier，G-RNTI)对PDU进行加扰，或对PDU对应的DCI进行加扰，一个或多个接收装置根据相同的G-RNTI对同一PDU进行接收。或者采用多播的方式传输PDU可以指通过半静态方式通知多个接收装置同一PDU的位置，多个接收装置可以同时对该PDU进行接收。或者采用多播的方式传输PDU可以指该PDU在为多播传输建立的无线承载中传输或者在专门为多播设计的信道中进行传输。
通过多播传输方式接收是指对侧采用多播方式发送的时候，多个接收装置中的一个装置根据G-RNTI对PDU进行接收；或者多个接收装置中的一个装置通过为多播传输建立的无线承载接收或者在用于多播传输的信道上进行接收PDU。
MBMS业务：点到多点的单向多媒体业务。例如，在空中接口通过公共信道向小区内的用户发送多媒体的广播业务，或者以多播的方式向小区内的用户发送由用户订购的多播业务，从而节省空口资源。
本申请实施例提供一种通信系统，该通信系统可以为IAB系统或者其他具有中继功能的通信系统，如基于终端设备中继的中继系统。这里，以IAB系统为例，该通信系统可以以包括：终端设备、IAB节点(IAB node)以及IAB宿主节点(IAB donor)；其中，终端设备可以与IAB node或者IAB donor进行通信，终端设备与IAB node之间的通信链路记为接入链路(access link)；另外，IAB node可以与其他IAB node或者可以与IAB donor进行通信，IAB node与IAB node或者与IAB donor之间的通信链路记为回传链路(backhaul link)。
可以理解的，这些链路的名称只是示例，并不代表对链路的限定，当通信系统版本变更时，相应的名称也可以用其他无线通信网络中的对应功能的名称进行替代，都属于本申请实施例保护范围之内。
上述终端设备可以是一种向用户提供语音或者数据连通性的设备，例如也可以称为用户设备(UE，User Equipment)、移动台(mobile station)、用户单元(subscriber unit)、站台(STAtion)或者终端设备(TE,Terminal Equipment)等。终端可以为蜂窝电话(cellular phone)、个人数字助理(PDA，Personal Digital Assistant)、无线调制解调器(modem)、手持设备(handheld)、膝上型电脑(laptop computer)、无绳电话(cordless phone)、无线本地环路(WLL，Wireless Local Loop)台或者平板电脑(pad)等。随着无线通信技术的发展，可以接入无线通信系统、可以与无线通信系统的网络侧进行通信，或者通过无线通信系统与其它设备进行通信的设备都可以是本申请实施例中的终端，譬如，智能交通中的终端和汽车、智能家居中的家用设备、智能电网中的电力抄表仪器、电压监测仪器、环境监测仪器、智能安全网络中的视频监控仪器、收款机等等。在本申请实施例中，终端可以与网络设备进行通信，多个终端之间也可以进行通信。终端可以是静态固定的，也可以是移动的。
以两跳数据回传场景为例，图1为本申请实施例中的通信系统的结构示意图，参见图1所示，该通信系统10包括：终端设备(如UE)11、IAB node1、IAB node2以及IAB donor。
其中，UE接入IAB node2(即为接入IAB node)，IAB donor通过NG接口与核心网(如5GC)连接。IAB donor为IAB node1的上一跳IAB节点，IAB node1为IAB node2的上一跳IAB节点，IAB node2为UE的上一跳IAB节点。IAB node1可以分为分布单元(distributed unit，DU)和移动终端(mobile terminal，MT)两个单元，IAB node2可以分为DU和MT两个单元，IAB donor可以DU和集中单元(centralized unit，CU)两个单元。IAB node1 DU和IAB node1 MT通过内部接口通信，IAB node2 DU和IAB node2 MT通过内部接口通信，IAB donor DU和IAB donor CU通过F1接口通信。UE和IAB node2之间的接口(具体为UE和IAB node2 DU之间的接口)记为Uu接口，将IAB node2和IAB node1之间的接口(具体为IAB node2 MT和IAB node1 DU之间的接口)记为Uu2接口，IAB node1和IAB donor之间的接口(具体为IAB node1 MT和IAB donor DU之间的接口)记为Uu1接口。
在实际应用中，IAB系统还应用于N跳数据回传场景，如三跳数据回传场景、五跳数据回传场景、八跳数据回传场景等，相应地，IAB系统中IAB node的数量N可以为大于或者等于2的整数，如可以为3、5、8等，本申请实施例不做具体限定。
图2为本申请实施例中的通信系统的用户面的协议栈结构示意图，参见图2所示，相比于普通基站，IAB基站中新增加了BAP实体(BAP层)其主要功能为路由功能，即当IAB node MT的BAP实体收到数据包以后决定该数据包下一步的去向，例如，MT的BAP实体将数据包传递给本IAB基站的更高层(包括但不限于IP层)处理，如进行IP筛选，读取IP包头中的数据包信息等，并由高层将处理后的数据包通过空口发送给接入本IAB基站的UE(可以理解为IAB基站下的UE)，或者，MT的BAP层将数据包转发给本设备内DU中对等的BAP层处理，并将处理后的数据包向下一跳IAB node，即下一个IAB基站转发。
对于BAP实体来说，决定数据包去向的依据为数据包包头中的BAP地址和PATH ID(路径标识)，其中BAP地址和PATH ID合称为routing ID(路由标识)。以下行数据传输为例，在每个IAB基站建立的时候，IAB宿主基站会为IAB基站分配一个IAB基站本身的地址，即BAP地址，同时在回传路由信息中指定该IAB基站的下一跳IAB基站或者IAB宿主基站对应的routing ID。可选的，回传路由信息中的routing ID可以与一个出口链路标识(ID)对应，数据包可以通过出口链路ID发送给下一跳IAB基站。
IAB宿主基站在发送数据之前，BAP实体会在BAP的包头中增加BAP地址和PATH ID，当IAB基站接收到数据以后，与分配给自己的BAP地址对比，如果数据中的BAP地址和自己的BAP地址相同则证明数据是发送给自己的，因此将其递交给上层(如IP层)处理完后发送给该IAB基站下的UE；如果数据包中的BAP地址和自己的BAP地址不同， 则证明数据不是发送给自己的，进而根据数据包中的BAP地址和PATH ID将其发送给下一跳IAB基站或者IAB宿主基站，或者将该数据包丢弃，以此类推。
在本申请实施例中，对于具有中继功能的通信系统，如集中接入回传(integrated access and backhaul，IAB)系统来说，目前的数据传输主要针对单播业务，即某单播传输业务的数据只会发送给某一个终端设备，而如果在后续的5G通信中引入多媒体广播组播业务(multimedia broadcast multicast service，MBMS)业务的话，由于MBMS业务需要同时发送给多个终端设备，当前中继通信系统对于单播业务的处理方式无法完成针对MBMS业务的传输。所以，如何在中继通信系统中进行MBMS业务的传输是一个亟待解决的问题。
为了解决上述问题，本申请实施例提供一种数据传输方法，该方法可以应用于上述通信系统中。下面结合上述两跳回传场景下的IAB系统，对该数据传输方法进行详细的说明。
首先，需要说明的是，第一网络设备可以为上述IAB系统中与IAB donor连接的第一个中继节点，如IAB node 1，或者，第一网络设备也可以为IAB系统中的其他中继节点(如IAB node i，i为大于1的正整数，或者，第一网络设备还可以为IAB系统中与UE连接的IAB node n，即边缘节点；第二网络设备可以为上述IAB系统中第一网络设备的下一跳网络设备，如第一网络设备为IAB node1，第二网络设备为IAB node 2，或者，第二网络设备也可以为IAB系统中其他中继节点，如IAB node i的下一跳节点，对此不做具体限定。在本申请实施例中，以第一网络设备为IAB node1，第二网络设备为IAB node 2为例。第三网络设备可以为上述IAB系统中的IAB donor。
图3为本申请实施例中的配置方法的流程示意图，参见图3所示，该方法可以包括：
S301：IAB donor判断IAB node1和/或IAB node2对第一MBMS业务是否感兴趣或者是否需要接收第一MBMS业务的数据；
这里，MBMS业务是面向多个UE的业务，例如直播业务、部分公共安全业务、批量软件更新业务等。
在一些可能的实施方式中，如果某一个IAB node对第一MBMS业务感兴趣或者需要接收第一MBMS业务的数据，该IAB node可以主动向IAB donor CU上报第一业务信息，以告知IAB donor CU该IAB node是对第一MBMS业务感兴趣或者需要接收第一MBMS业务的数据的。当然，这个IAB node在发送第一业务信息时，还可以告知IAB donor CU自身是对其他MBMS业务感兴趣或者需要接收其他MBMS业务的数据的，也就是说，该IAB node可以一次性向IAB donor CU上报自身对MBMS业务的偏好，也可以针对一个MBMS业务向IAB donor CU上报一次，对此本申请实施例不做具体限定。
值得注意的是，这里IAB node向IAB donor上报，在一种实施方式中可以是IAB node下面的终端设备向IAB donor上报，上报信息通过IAB node发送给IAB donor，而IAB node对第一MBMS业务感兴趣或者需要接收第一MBMS业务的数据，可以是IAB node下面的 终端设备对第一MBMS业务感兴趣或者需要接收第一MBMS业务的数据，即上报的过程可以由IAB node或者IAB node下的UE发起。
在其他实施方式中，IAB donor CU也可以向这个IAB node下发上报请求(如采用计数(counting)机制)，以请求该IAB node上报上述第一业务信息，IAB node接收到该上报请求后，向IAB donor上报第一业务信息。同上所述，这里可以是IAB donor CU还可以向这个IAB node下的UE下发上报请求。
由此，IAB donor在收的到IAB node上报的业务指示之后，便可以确定该IAB node或作者IAB node下的UE对第一MBMS业务感兴趣或者需要接收第一MBMS业务的数据。
在一些可能的实施方式中，核心网设备在建立或者修改PDU会话或者服务质量(quality of service，QoS)流的时候，可以向IAB donor CU发送第二业务信息，以告知该PDU会话或者QoS流是用于传输MBMS业务的，那么，IAB donor CU可以确定该PDU会话或者QoS流所对应的IAB node或者UE是对该MBMS业务感兴趣或者需要接收MBMS业务的数据的。对于上行业务来说，核心网设备可以是接收到UE的业务建立请求，从而判断UE要接收MBMS业务；对于下行业务，核心网设备可以判断该下行业务是否是MBMS业务以及根据UE的地址信息或者UE ID判断该MBMS业务是发给哪些UE的。
进一步地，核心网设备下发的第二业务指示还可以用于指示该PDU会话或者QoS流具体是传输哪种MBMS业务，如该PDU会话或者QoS流是用于传输第一MBMS业务的。
通过上述方法，IAB donor可以判断IAB node1和IAB node2或者其下面的UE是否对第一MBMS业务感兴趣或者需要接收第一MBMS业务的数据。
S302：如果IAB node1和IAB node2或者其下面的UE对第一MBMS业务感兴趣或者需要接收第一MBMS业务的数据，则IAB donor为IAB node1和IAB node 2配置第二信息；
这里，第二信息可以包括：路由地址和/或第二MBMS业务的业务标识。其中，路由地址可以包括IAB donor为IAB node分配的BAP地址或者IAB donor为IAB node分配的用于表示该IAB node的第一地址，对此不做具体限定。
在一些可能的实施例中，上述路由地址可以是与第一MBMS业务对应的，也就是说，针对不同的MBMS业务，IAB donor可以根据IAB node对MBMS业务的需求为其配置不同的路由地址，以便IAB node可以针对不同的MBMS业务的数据包采用不同的处理策略。或者，上述路由地址还可以与第一MBMS业务没有关联，仅仅是IAB donor为了表示IAB node而配置的地址，第一MBMS的数据能够根据该路由地址发送至该IAB node即可，对此不做具体限定。
在本申请实施例中，由于IAB node或者该IAB node下的UE可以上报对多个MBMS业务的感兴趣指示，那么，IAB donor也可以为IAB node配置多个路由地址，每个路由地址与不同的MBMS业务对应，或者，IAB donor也可以为IAB node配置一个路由地址，该 路由地址与多个MBMS业务对应。
S303：IAB donor将第二信息分别发送给相应的IAB node；
IAB donor在通过上述S301和S302为IAB node配置对应的第二信息后，分别将第二信息通过F1接口的控制信令或者通过无线资源控制(radio resource control，RRC)信令发送给相应的IAB node。
至此，IAB donor完成了对IAB node的配置过程。
在上述配置过程中，IAB donor CU对IAB node进行配置，并将配置好的第二信息发送给IAB node。
接下来，上述IAB系统进行数据传输，下面以下行传输为例进行说明，上行传输过程与之类似。
图4为本申请实施例中的数据传输方法的第一种流程示意图，参见图4中实线所示，该方法可以包括：
S401：IAB donor CU接收来自核心网的第一数据包；
其中，第一数据包为第一MBMS业务的数据包。
在本申请实施例中，核心网会为每个MBMS业务配置相应的指示信息，该指示信息可以包括以下至少一个：IPV6流标签、差分服务代码点(differentiated services code point，DSCP)标识、目的IP地址、MBMS业务的业务标识。当然，上述指示信息还可以包括其他信息，对此不做具体限定。上述指示信息可以包含在数据包中或者承载在单独的控制信令中。
进一步地，上述目的IP地址可以为组播IP地址，即为多个IAB node分配的相同对的IP地址，该组播IP地址可以用于MBMS业务的发送与接收。
S402：IAB donor CU将第一数据包发送给IAB donor DU；
这里，IAB donor CU在执行S402时可以将上述指示信息携带在第一数据包的包头发送给IAB donor DU，当然，也可以通过独立的控制信令，如FI接口信令，由IAB donor CU发送给IAB donor DU。当然，还可以采用其他的方式发送上述指示信息，本申请实施例不做具体限定。
S403：IAB donor DU为第一数据包配置第一信息；
在一些可能的实施方式中，IAB donor CU可以预先向IAB donor DU发送对应于不同MBMS业务的上述指示信息与路由信息的映射关系，也就是说IAB donor CU为不同的MBMS业务分配第五信息，第五信息可以包括路由地址(如BAP地址或者第一地址)和/或MBMS业务的业务标识，第一地址为IAB donor CU为IAB node1分配的仅用于表示IAB node1的地址。
那么，IAB donor DU接收到第一数据包后，可以根据第一数据包或者第一MBMS业 务对应的第一指示信息以及上述映射关系(第一指示信息即为对应于第一MBMS业务的上述指示信息)，确定第一信息，并为第一数据包的包头(如BAP包头)添加该第一信息。具体来说，IAB donor DU根据上述映射关系进行查询，查找到与第一指示信息对应的第一信息，然后，IAB donor DU将第一信息添加在第一数据包的包头中。
在一些可能的实施方式中，第一信息可以包括第一MBMS业务的路由地址(如BAP地址或者第二地址)和/或第一MBMS业务的业务标识。
S404：IAB donor DU向IAB node 1发送携带第一信息的第一数据包；
IAB donor CU可以为IAB donor DU配置路由信息与下一跳IAB node的映射关系，该映射关系用于IAB donor DU确定下一跳IAB node。IAB donor DU确定第一信息之后，可以根据根据第一信息以及该映射关系确定下一跳IAB node。下一跳IAB node根据IAB donor CU配置的路由信息继续寻找下一跳IAB node，依次类推。在经过若干个IAB node以后，携带第一信息的第一数据包会到达IAB node 1。
S405：IAB node 1判断第一数据包携带的第一信息和自身的第二信息是否匹配；若是，执行S406；若否，执行S407；
IAB node 1对第一数据包中的第一信息和自身的第二信息进行比对，判断两者是否匹配。例如，IAB node 1将第一数据包中的BAP地址与IAB donor为IAB node 1配置的BAP地址进行比对看两者是否匹配，当然，也可以理解为判断第一数据包中的BAP地址与IAB donor为IAB node 1配置的BAP地址是否一致，如果相匹配(一致)，则在执行S406，反之，执行S407；或者，IAB node 1还可以将第一数据包中的第一MBMS业务的业务标识与IAB donor为IAB node 1配置的第二MBMS业务的业务标识进行比对看两者是否匹配，如果相匹配(一致)，则在执行S406，反之，执行S407。
S406：：IAB node 1将第一数据包发送给IAB node 1下面的至少一个UE；
在S401至S407中，IAB node 1所执行的步骤可以是由IAB node 1中的BAP实体(BAP层)来执行的，那么，在S406中，IAB node 1的BAP实体移除第一数据包的BAP包头，并传输给自身的高层，如IP层，由IP层进一步地处理，如进行IP筛选，读取IP包头中的数据包信息等，之后将将第一数据包以单播或者组播的方式发送给IAB node 1下的UE。
在一些可能的实施方式中，由于同一MBMS业务的数据包是发送给多个IAB node的，那么，数据包中的IP地址有可能与其中的某些IAB node的IP地址不匹配，此时，数据包很可能在IP层被丢弃，那么，为了避免数据包被IAB node丢弃，那么，在执行S406时，BAP实体可以指示IP层不对第一数据包进行第一处理，使得IP层忽略IP地址的差异，进而使得该IAB node能够将第一数据包发送给UE，而不是由于IP地址不匹配而丢弃。
在本申请实施例中，上述第一处理可以包括：根据第一数据包携带的IP地址对第一数据包进行筛选或者丢弃第一数据包，也就是说，BAP实体可以向IP层发送第二指示信息， 该第二指示信息可以指示IP层不对第一数据包进行IP地址筛选或者不丢弃第一数据包。
当然，在本申请其他实施例中，在上述配置过程中，IAB donor还可以为IAB node配置至少一个IP地址，那么，在执行S406时，如果第一数据包的IP地址与上述至少一个IP地址均不匹配，IAB node还可以将第一数据包的IP地址修改为至少一个IP地址中的第一IP地址，这样IP层在执行处理的时候，由于IP地址是匹配的，就不会丢弃第一数据包。
在具体实施过程中，BAP实体还可以采用其他方式来避免第一数据包被IAB node 1丢弃，对此不做具体限定。
在一些可能的实施方式中，在上述配置过程中，IAB donor还可以为IAB node 1配置与MBMS业务对应的一个或者多个组播IP地址(第四信息)，那么，在IAB node 1的BAP实体可以将第一数据包发送给IP层，IP层将第一数据包中携带的目的IP地址(组播IP地址)与为IAB node 1配置的一个或者多个组播IP地址进行筛选，如果存在相匹配的组播IP地址，则IP层认为该第一数据包为自身需要接收的数据包，并将第一数据包发送给UE，反之，IP层认为第一数据包不是自身需要接收的数据包，则可以丢弃第一数据包。
S407：IAB node 1将第一数据包发送给N个下一跳IAB node(即IAB node 2)。
这里，IAB node 1在通过S405确定第一信息和第二信息不匹配后，可以确定第一数据包不是发送给自己或者自己下面的UE的数据包，那么，IAB node1就需要将第一数据包转发给下一跳IAB node，而并不发送给接入IAB node 1的UE。
IAB node 1可以与N个IAB node 2连接，N为正整数，那么，IAB node 1在确定第一数据包不是发送给自己的数据包之后，要将第一数据包转发给下一跳IAB node，此时，IAB node 1需要先确定下一跳IAB node。由于在上述IAB系统为两条跳回传场景下的IAB系统，那么，对于IAB node 1来说，N个IAB node2就是其所有的下一跳IAB node，那么，IAB node 1将第一数据包发送给N个IAB node 2。
进一步地，为了保证数据的有效传输，在确定下一跳IAB node时，可以选择自身所有下一跳IAB node中可用的N个IAB node，例如，IAB node 1与M个IAB node 2连接，M为大于N的正整数，IAB node 1可以将M个IAB node 2中可用的N个IAB node 2确定为下一跳IAB node。反之，如果IAB node 1的下一跳IAB node均为不可用的，那么，IAB node1丢弃第一数据包。
需要说明的是，上述“可用的”是指可达的，也就是说，如果某一个IAB node是可用的，就表示该IAB node可以完成正常传输，相反的，如果某一个IAB node是不可用的，就表示该IAB node可能由于无线链路质量太差、无线链路断开或者无线链路失败等原因导致无法满足传输需求。
在本申请实施例中，IAB node 1执行在S405确定第一信息和第二信息不匹配之后，还可以进一步判断IAB node 1是否存在下一跳IAB node，如果IAB node 1不存在下一跳IAB  node，此时，IAB node1可以为IAB系统中的最边缘或者最后的节点，此时，IAB node1可以丢弃第一数据包。
在一些可能的实施例中，S407还可以包括：IAB node 1根据第一信息确定N个下一跳IAB node(IAB node 2)；
IAB node 1在确定转发第一数据包给下一跳IAB node之后，还可以根据第一数据包中的第一信息(如BAP地址)，将与自身连接的IAB node2中与该BAP地址相匹配的N个IAB node2确定为下一跳IAB node，并将第一数据包发送给N个IAB node 2。
进一步地，第一信息还可以包括PATH ID，那么，IAB node 1进一步根据PATH ID确定下一跳IAB node。IAB node 1可以将与自身连接的IAB node2中与第一数据包中的BAP地址和PATH ID都匹配的N个IAB node2确定为下一跳IAB node，并将第一数据包发送给N个IAB node 2。
需要说明的是，在上述通信系统中数据包可以分为两类：单播业务的数据包和组播业务的数据包，两种业务数据包使用不同的数据包格式。
图5为本申请实施例中的一种单播业务数据包BAP包头格式的示意图，参见图5所示，其中，R(reserved)为预留域，T域(可以称为Type域)，由于单播业务数据包的格式与组播业务数据包的格式不同，所以用T域用来指示该数据包为单播业务数据包还是组播业务数据包，BAP address域也可以称为DESTINATION域，指示该数据包对应的BAP地址，Data域为该数据包对应的负载(例如IP包)，D/C域用来指示该数据包为控制PDU还是数据PDU，PATH ID域也可以称为PATH域，用来指示path ID。图6为本申请实施例中的一种组播业务数据包BAP包头格式的示意图，参见图6所示，与单播业务不同的是，当数据包为组播业务数据包的时候，BAP address域用于指示组播业务对应的BAP address，可以称为BAP address M。
在本申请实施例中，通过上述S407的实施，整个配置过程以及各个IAB基站的处理复杂度降低，同时MBMS业务数据包的包头格式简化，传输开销降低。
在一些可能的实施方式中，IAB node 1还可以获得第三信息，第三信息用于表示PATH ID与下一跳IAB node之间的映射关系。进一步地，第二信息和第三信息也可以共同表示路由地址和PATH与下一跳IAB node之间的映射关系。在实际应用中，第三信息可以是由IAB donor在上述配置过程中为IAB node1配置的，也可以是IAB node自己预置或者创建的。IAB node 1根据第三信息，查询与第一数据包中的路由地址和PATH ID中至少一个PATH ID都匹配的N个IAB node 2，即下一跳IAB node，并将第一数据包发送给N个IAB node 2。
在具体实施过程中，第三信息可以包括：MBMS业务对应的路由地址(如BAP地址)、PATH ID、下一跳IAB node的路由地址(如BAP地址)和PATH ID；或者，第三信息还 可以包括：链路标识，链路标识为与下一跳IAB node对应的出口链路的标识，该链路标识可以是由IAB donor为IAB node1配置的，也可以是IAB node 1根据IAB donor为IAB node1配置的MBMS业务对应的路由地址(如BAP地址)、PATH ID、下一跳IAB node的路由地址(如BAP地址)和PATH ID等自行创建的。当然，链路标识还可以存在其他的获得方式，对比不做具体限定。
需要说明的是，在IAB donor为IAB node 1配置第三信息的情况下，上述通信系统中的数据包可以分为两类：单播业务的数据包和组播业务的数据包，两种业务数据包共用相同的数据包格式；不同组播业务的数据包的BAP包头携带与各组播业务对应的BAP地址和/或PATH ID，而不同单播业务的数据包的BAP包头携带各目的IAB node对应的BAP地址和/或PATH ID。
其中，IAB node对应的BAP地址在每个IAB node上各不相同，而且可以对应多种单播业务，而组播业务对应的BAP地址可以同时配置给多个不同的IAB node，每个BAP地址对应一种组播业务或者多种组播业务。
图7为本申请实施例中的一种BAP包头格式的示意图，参见图7所示，其中R(reserved)为预留域，BAP address域也可以称为DESTINATION域，指示该数据包对应的BAP地址，Data域为该数据包对应的负载(例如IP包)，D/C域用来指示该数据包为控制PDU还是数据PDU，PATH ID域也可以称为PATH域，用来指示PATH ID。
在本申请实施例中，由于IAB donor为IAB node 1配置了MBMS业务对应的公共路由地址(如第二信息和第三信息)，可以避免MBMS业务数据包走冗余路径进行传输，使得整个传输过程简洁高效。
那么，在上述S407中，IAB node1在寻找下一跳IAB node的时候，还可以首先根据第三信息查询有没有路由地址和PATH ID中的至少一个PATH ID匹配的N个IAB node 2(即下一跳IAB node)，如果有，IAB node1将第一数据包发送给这N个IAB node 2；如果没有路由地址和至少一个PATH ID都匹配的，则查询有没有路由地址匹配的N个IAB node2，如果有，IAB node1将第一数据包发送给这N个IAB node 2；如果既没有路由地址匹配的也没有至少一个PATH ID匹配的IAB node 2，则IAB node 1可以丢弃该第一数据包或者将第一数据包发送给与IAB node 1连接的所有IAB node 2，即IAB node 1的所有下一跳IAB node。
需要说明的是，在IAB node 1将第一数据包发送给N个IAB node 2之前，还可以对第一数据包进行复制，获得包括原有的第一数据包(即来自IAB donor的第一数据包)在内的N份第一数据包，这N份第一数据包与原有的第一数据包是一模一样的。然后，IAB node 1将这N份第一数据包分别发送给N个IAB node 2。当然，IAB node 1还可以将来自IAB donor的第一数据包通过N次发送分别发送给N个IAB node 2。
至此，实现了在IAB系统中传输下行MBMS业务。
在本申请实施例中，参见图4中虚线所示，IAB node 1在执行S405确定第一数据包的第一信息和自身的第二信息相匹配之后，还可以执行S408：IAB node 1将第一数据包发送给IAB node1下的至少一个UE以及N个IAB node 2。
需要说明的是，这里的N个IAB node 2与上述实施例中的N个IAB node 2一致，在此不再赘述。
IAB node 1在确定第一数据包的第一信息与自身的第二信息相匹配时，可以将第一数据包同时发送给接入IAB node1的UE以及N个IAB node 2。具体来说，IAB node 1可以将第一数据包进行复制，获得包括原有的第一数据包(即来自IAB donor的第一数据包)在内的N+1份第一数据包，这N+1份第一数据包与原有的第一数据包是一模一样的。然后，IAB node 1将这N+1份第一数据包中的1份第一数据包发送给UE并将另外的N份第一数据包分别发送给N个IAB node 2。当然，IAB node 1还可以将来自IAB donor的第一数据包通过N+1次发送分别发送给UE和N个IAB node 2。
在本申请另一实施例中，图8为本申请实施例中的数据传输方法的第二种流程示意图，参见图8所示，该方法可以包括：
S801：IAB donor CU接收来自核心网的第一数据包；
S802：IAB donor CU将第一数据包发送给IAB donor DU；
S803：IAB donor DU向IAB node 1发送第一数据包；
S804：IAB node 1将第一数据包发送给N个下一跳IAB node(即IAB node 2)。
在S801至S804中，IAB donor CU无需为第一数据包配置第一信息，而是可以直接将第一数据包发送给IAB node 1，并由IAB node 1转发给N个IAB node 2。也就是说，IAB node1无需对第一数据包的第一信息与IAB node1的第二信息进行匹配，而是直接将第一数据包转发给N个IAB node2。
在图4和图8所示的实施例中，IAB donor无需针对MBMS业务额外配置BAP地址，另外通过接入链路传输MBMS业务可以降低回传链路的负载。
在本申请实施例中，还提供一种数据传输方法，该方法可以应用于上述IAB系统。
图9为本申请实施例中的数据传输方法的第三种流程示意图，参见图9所示，该方法可以包括：
S901：IAB donor CU接收来自核心网的第二数据包；
这里，第二数据包为第三MBMS业务的数据包，第二数据包可以与第一数据包相同，也可以不同。
S902：IAB donor CU将第二数据包发送给IAB donor DU；
S903：IAB donor DU以单播或者组播的方式向IAB node 1MT发送第二数据包；
S904：IAB node 1 MT将第一数据包发送给IAB node 1 DU；
S905：IAB node 1 DU以单播或者组播的方式向UE和/或IAB node 2 MT发送第二数据包。
上述S901至S905可以为：IAB donor或者上一跳IAB node通过单播或者组播的方式将第三MBMS业务的第二数据包发送给自身下的至少一个UE以及第一级IAB node(如IAB node1)，第一级IAB node在收到第二数据包之后，还可以再通过单播或者组播的方式发送给自身下的至少应UE以及第二级IAB基站(如IAB node2)。
具体来说，IAB node从上一级IAB node以单播或者组播的方式接收到第二数据包以后，可以经过该IAB node MT中的物理(PHY)层、介质访问控制(MAC)层的处理后再通过IAB node DU中的MAC层、PHY层处理后发送出去；也可以经过IAB node MT中的PHY层、MAC层、无线链路控制(RLC)层的处理后再通过IAB node DU中的RLC层、MAC层、PHY层处理后发送出去，当然，还可以通过两个模块中PDCP层的处理再发送出去，以此类推，不再赘述。
在本申请实施例中，上述S905中通过组播传输方式发送是指：IAB donor CU或上一跳IAB node DU在发送PDU会话对应的TB时，采用G-RNTI对PDU进行加扰，或对PDU对应的DCI进行加扰，一个或多个IAB node MT或UE根据相同的G-RNTI对同一PDU进行接收；或者IAB donor CU或IAB node DU通过半静态方式通知多个IAB node MT同一PDU的时域或者频域的位置，多个IAB node MT或UE可以同时对该PDU进行接收；或者，IAB donor CU或IAB node DU在为组播传输建立的无线承载中传输或者在专门为组播设计的信道(如MCCH/MTCH信道)中进行传输该PDU。
相应地，上述S903中通过组播的方式接收是指：IAB donor CU或上一跳IAB node DU采用组播方式发送的时候，多个IAB node MT或UE中的某一个根据G-RNTI对PDU进行接收；或者，多个IAB node MT或UE中的某一个通过为组播传输建立的无线承载接收或者在用于组播传输的信道上进行接收PDU。
在一些可能的实施方式中，如果IAB node要从上一级IAB node通过组播的方式接收MBMS业务的数据包，IAB donor就需要将上一级IAB node发送组播的配置信息发送给该IAB node。在本申请实施例中，该配置信息可以包括如第三MBMS业务对应的G-RNTI、接收第二数据包的时域位置信息、接收第二数据包的频域位置信息等信息，还可以包括如接收第三MBMS业务的物理信道、传输信道以及逻辑信道等信息，对此本申请实施例不做具体限定。
在实际应用中，上述配置信息可以IAB donor通过F1接口控制信令发送给该IAB node或者通过RRC信令发送给该IAB node。
作为一种可能的实现方式，IAB node还可以从上一级IAB node通过单播的方式接收 第二数据包，然后通过组播的方式向下一级IAB node发送第二数据包；或者，IAB node可以从上一级IAB node通过组播的方式接收第二数据包，然后通过单播的方式向下一级IAB node发送第二数据包，对此本申请实施例不作具体限定。
在一些可能的实施方式中，上述图4至图8所示的实施例均为通过回传链路发送MBMS业务的数据包，而图9所示实施例在本质上则是通过接入链路发送MBMS业务的数据包，这两种发送方式可以互相独立执行，即任选其一，也可以由IAB donor指示IAB node通过哪一种方式进行MBMS业务的数据包的传输。
在本申请图9所示的实施例中，IAB donor无需针对MBMS业务额外配置BAP地址，另外通过接入链路传输MBMS业务可以降低回传链路的负载。
基于相同的发明构思，本申请实施例提供一种通信装置，该通信装置可以为数据传输装置或者数据传输装置中的芯片或者片上系统，还可以为数据传输装置中用于实现上诉实施例中IAB node 1所执行的方法的功能模块，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。举例来说，图10为本申请实施例中的通信装置的第一种结构示意图，参见图10所示，该通信装置100，可以包括：第一接收模块101，用于接收第一数据包，第一数据包为第一MBMS业务的数据包，第一数据包携带有第一信息；第一发送模块102，用于如果第一网络设备的第二信息与第一信息相匹配，则将第一数据包发送给接入第一网络设备的终端设备，第二信息是为第一网络设备预先配置的。
在一些可能的实施方式中，第一发送模块，还用于如果第一网络设备的第二信息与第一信息相匹配，将第一数据包发送给N个第二网络设备，N为正整数。
在一些可能的实施方式中，第一发送模块，还用于根据第一数据包，获得N+1份第一数据包；将N+1份第一数据包分别发送给终端设备以及N个第二网络设备。
在一些可能的实施方式中，仍参见图10所示，装置还包括：第二发送模103，用于如果第一网络设备的第二信息与第一信息不匹配，则将第一数据包发送给N个第二网络设备，N为正整数。
在一些可能的实施方式中，第二发送模块，还用于根据第一数据包，获得N份第一数据包；将N份第一数据包分别发送给N个第二网络设备。
在一些可能的实施方式中，第二发送模块，还用于如果第一网络设备的第二信息与第一信息不匹配，且第一网络设备的下一跳网络设备不可用，则丢弃第一数据包。
在一些可能的实施方式中，N个第二网络设备为第一网络设备的所有下一跳网络设备。
在一些可能的实施方式中，第一信息包括：第一MBMS业务对应的路由地址和/或第一MBMS业务的业务标识；第二信息包括：为第一网络设备配置的路由地址和/或第二MBMS业务的业务标识。
在一些可能的实施方式中，仍参见图10所示，装置还包括：第一处理模块104，用于根据第一信息，确定N个第二网络设备；或者，第一信息还包括：路径标识(PATH ID)；第一处理模块，还用于根据路径标识，确定N个第二网络设备。
在一些可能的实施方式中，第一处理模块，还用于第一网络设备获得第三信息，第三信息用于表示路径标识与第二网络设备之间的映射关系；根据路径标识以及第三信息，确定N个第二网络设备。
在一些可能的实施方式中，第一发送模块，具体用于在将第一数据包发送给终端设备之前，指示IP层不对第一数据包进行第一处理，第一处理包括根据第一数据包携带的IP地址对第一数据包进行筛选或者丢弃第一数据包；或者，将第一数据包的IP地址修改为第一IP地址，第一IP地址是为第一网络设备预先配置的IP地址。
在一些可能的实施方式中，第一发送模块，还用于获得第四信息，第四信息包括为第一网络设备配置的组播IP地址；根据组播IP地址将第一数据包发送给终端设备。
基于相同的发明构思，本申请实施例提供一种通信装置，该通信装置可以为数据传输装置或者数据传输装置中的芯片或者片上系统，还可以为数据传输装置中用于实现上述实施例中IAB donor所执行的方法的功能模块，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。举例来说，图11为本申请实施例中的通信装置的第二种结构示意图，参见图11所示，该通信装置110，包括：第二处理模块111，用于为第一MBMS业务的第一数据包配置对应的第一信息；第三发送模块112，用于将第一数据包发送给第一网络设备，第一数据包携带有第一信息，第一信息用于触发第一网络设备执行如下至少一种操作：向接入第一网络设备的终端设备发送第一数据包，向N个第二网络设备发送第一数据包，丢弃第一数据包。
在一些可能的实施方式中，第二处理模块，还用于为第一网络设备配置第二信息，第二信息与第二MBMS业务对应。
在一些可能的实施方式中，第二信息包括：为第一网络设备配置的路由地址和/或第二MBMS业务的业务标识。
在一些可能的实施方式中，第一信息包括：第一MBMS业务对应的路由地址和/或第一MBMS业务对应的业务标识。
在一些可能的实施方式中，第一信息还包括：第一MBMS业务对应的路径标识；第二处理模块，还用于为第一网络设备配置第三信息，第三信息用于表示路径标识与第二网络设备之间的映射关系。
在一些可能的实施方式中，第二处理模块，还用于为第一网络设备配置第四信息，第四信息包括与第一MBMS业务对应的组播IP地址，组播IP地址用于指示第一网络设备发送第一数据包给终端设备。
基于相同的发明构思，本申请实施例提供一种通信装置，该通信装置可以为数据传输装置或者数据传输装置中的芯片或者片上系统，还可以为数据传输装置中用于实现上述实施例中IAB node 1所执行的方法的功能模块，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。举例来说，图12为本申请实施例中的通信设备的第三种结构示意图，参见图12所示，该通信装置120，包括：第二接收模块121，用于以单播或组播的方式接收第四网络设备发送的第二数据包，第二数据包为第三多媒体广播组播业务MBMS业务的数据包；第四发送模块122，用于将第二数据包以单播或组播的方式发送给接入第一网络设备的终端设备和/或第二网络设备。
在一些可能的实施方式中，第四发送模块，具体用于获得第二数据包对应的配置信息；根据配置信息，接收第二数据包。
在一些可能的实施方式中，配置信息包括以下至少一种：第三MBMS业务对应的G-RNTI、接收第二数据包的时域位置信息、接收第二数据包的频域位置信息。
基于相同的发明构思，本申请实施例提供一种网络设备，包括：处理器和存储器；处理器与存储器耦合，处理器被配置为读取并执行存储器中的指令，以实现如上述第一方面、第三方面及其各可能的实施方式中的数据传输方法。
基于相同的发明构思，本申请实施例提供一种网络设备，包括：处理器和存储器；处理器与存储器耦合，处理器被配置为读取并执行存储器中的指令，以实现如上述第二方面及其各可能的实施方式中的数据传输方法。
基于相同的发明构思，本申请实施例提供一种计算机可读存储介质，计算机可读存储介质存储有指令，当指令在计算机上运行时，用于执行上述第一至三方面中任一的数据传输方法。
基于相同的发明构思，本申请实施例提供一种计算机程序或计算机程序产品，当计算机程序或计算机程序产品在计算机上被执行时，使得计算机实现上述第一方面和/或第三方面中任一的数据传输方法。
本领域技术人员能够领会，结合本文公开描述的各种说明性逻辑框、模块和算法步骤所描述的功能可以硬件、软件、固件或其任何组合来实施。如果以软件来实施，那么各种说明性逻辑框、模块、和步骤描述的功能可作为一或多个指令或代码在计算机可读媒体上存储或传输，且由基于硬件的处理单元执行。计算机可读媒体可包含计算机可读存储媒体，其对应于有形媒体，例如数据存储媒体，或包括任何促进将计算机程序从一处传送到另一处的媒体(例如，根据通信协议)的通信媒体。以此方式，计算机可读媒体大体上可对应于(1)非暂时性的有形计算机可读存储媒体，或(2)通信媒体，例如信号或载波。数据存储媒体可为可由一或多个计算机或一或多个处理器存取以检索用于实施本申请中描述的技术的指令、代码和/或数据结构的任何可用媒体。计算机程序产品可包含计算机可读媒体。
作为实例而非限制，此类计算机可读存储媒体可包括RAM、ROM、EEPROM、CD-ROM或其它光盘存储装置、磁盘存储装置或其它磁性存储装置、快闪存储器或可用来存储指令或数据结构的形式的所要程序代码并且可由计算机存取的任何其它媒体。并且，任何连接被恰当地称作计算机可读媒体。举例来说，如果使用同轴缆线、光纤缆线、双绞线、数字订户线(DSL)或例如红外线、无线电和微波等无线技术从网站、服务器或其它远程源传输指令，那么同轴缆线、光纤缆线、双绞线、DSL或例如红外线、无线电和微波等无线技术包含在媒体的定义中。但是，应理解，所述计算机可读存储媒体和数据存储媒体并不包括连接、载波、信号或其它暂时媒体，而是实际上针对于非暂时性有形存储媒体。如本文中所使用，磁盘和光盘包含压缩光盘(CD)、激光光盘、光学光盘、数字多功能光盘(DVD)和蓝光光盘，其中磁盘通常以磁性方式再现数据，而光盘利用激光以光学方式再现数据。以上各项的组合也应包含在计算机可读媒体的范围内。
可通过例如一或多个数字信号处理器(DSP)、通用微处理器、专用集成电路(ASIC)、现场可编程逻辑阵列(FPGA)或其它等效集成或离散逻辑电路等一或多个处理器来执行指令。因此，如本文中所使用的术语“处理器”可指前述结构或适合于实施本文中所描述的技术的任一其它结构中的任一者。另外，在一些方面中，本文中所描述的各种说明性逻辑框、模块、和步骤所描述的功能可以提供于经配置以用于编码和解码的专用硬件和/或软件模块内，或者并入在组合编解码器中。而且，所述技术可完全实施于一或多个电路或逻辑元件中。
本申请的技术可在各种各样的装置或设备中实施，包含无线手持机、集成电路(IC)或一组IC(例如，芯片组)。本申请中描述各种组件、模块或单元是为了强调用于执行所揭示的技术的装置的功能方面，但未必需要由不同硬件单元实现。实际上，如上文所描述，各种单元可结合合适的软件和/或固件组合在编码解码器硬件单元中，或者通过互操作硬件单元(包含如上文所描述的一或多个处理器)来提供。
在上述实施例中，对各个实施例的描述各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
以上所述，仅为本申请示例性的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应该以权利要求的保护范围为准。

Claims (45)

  1. 一种数据传输方法，其特征在于，包括：
    第一网络设备接收第一数据包，所述第一数据包为第一多媒体广播组播业务MBMS业务的数据包，所述第一数据包携带有第一信息；
    如果所述第一网络设备的第二信息与所述第一信息相匹配，则所述第一网络设备将所述第一数据包发送给接入所述第一网络设备的终端设备，所述第二信息是为所述第一网络设备预先配置的。
  2. 根据权利要求1所述的方法，其特征在于，如果所述第一网络设备的第二信息与所述第一信息相匹配，所述方法还包括：
    所述第一网络设备将所述第一数据包发送给N个第二网络设备，N为正整数。
  3. 根据权利要求2所述的方法，其特征在于，所述方法还包括：
    所述第一网络设备根据所述第一数据包，获得N+1份第一数据包；
    所述第一网络设备将所述N+1份第一数据包分别发送给所述终端设备以及所述N个第二网络设备。
  4. 根据权利要求1至3任一项所述的方法，其特征在于，所述方法还包括：
    如果所述第一网络设备的第二信息与所述第一信息不匹配，则所述第一网络设备将所述第一数据包发送给N个第二网络设备，N为正整数。
  5. 根据权利要求4所述的方法，其特征在于，所述第一网络设备将所述第一数据包发送给N个第二网络设备，包括：
    所述第一网络设备根据所述第一数据包，获得N份第一数据包；
    所述第一网络设备将所述N份第一数据包分别发送给所述N个第二网络设备。
  6. 根据权利要求4或5所述的方法，其特征在于，如果所述第一网络设备的第二信息与所述第一信息不匹配，所述方法还包括：
    如果所述第一网络设备的下一跳网络设备不可用，则所述第一网络设备丢弃所述第一数据包。
  7. 根据权利要求1至6任一项所述的方法，其特征在于，所述N个第二网络设备为所述第一网络设备的所有下一跳网络设备。
  8. 根据权利要求1至7任一项所述的方法，其特征在于，所述第一信息包括：所述第一MBMS业务对应的路由地址和/或所述第一MBMS业务的业务标识；
    所述第二信息包括：为所述第一网络设备配置的路由地址和/或第二MBMS业务的业务标识。
  9. 根据权利要求8所述的方法，其特征在于，所述第一信息还包括：路径标识；
    所述方法还包括：所述第一网络设备根据所述路径标识，确定所述N个第二网络 设备。
  10. 根据权利要求9所述的方法，其特征在于，所述方法还包括：
    所述第一网络设备获得第三信息，所述第三信息用于表示路径标识与第二网络设备之间的映射关系；
    所述第一网络设备根据所述路径标识，确定所述N个第二网络设备，包括：
    所述第一网络设备根据所述路径标识以及所述第三信息，确定所述N个第二网络设备。
  11. 根据权利要求1至10任一项所述的方法，其特征在于，在所述第一网络设备将所述第一数据包发送给所述终端设备之前，所述方法还包括：
    所述第一网络设备指示IP层不对所述第一数据包进行第一处理，所述第一处理包括根据所述第一数据包携带的IP地址对所述第一数据包进行筛选或者丢弃所述第一数据包；或者，
    所述第一网络设备将所述第一数据包的IP地址修改为第一IP地址，所述第一IP地址是为所述第一网络设备预先配置的IP地址。
  12. 根据权利要求1至10任一项所述的方法，其特征在于，所述第一网络设备将所述第一数据包发送给所述终端设备，包括：
    所述第一网络设备获得第四信息，所述第四信息包括为所述第一网络设备配置的组播IP地址；
    所述第一网络设备根据所述组播IP地址将所述第一数据包发送给所述终端设备。
  13. 一种数据传输方法，其特征在于，包括：
    第三网络设备为第一多媒体广播组播业务MBMS业务的第一数据包配置对应的第一信息；
    所述第三网络设备将所述第一数据包发送给第一网络设备，所述第一数据包携带有所述第一信息，所述第一信息用于触发所述第一网络设备执行如下至少一种操作：向接入第一网络设备的终端设备发送第一数据包，向N个第二网络设备发送第一数据包，丢弃第一数据包。
  14. 根据权利要求13所述的方法，其特征在于，所述方法还包括：
    所述第三网络设备为所述第一网络设备配置第二信息，所述第二信息与第二MBMS业务对应。
  15. 根据权利要求13或14所述的方法，其特征在于，所述第二信息包括：为所述第一网络设备配置的路由地址和/或第二MBMS业务的业务标识。
  16. 根据权利要求13至15任一项所述的方法，其特征在于，所述第一信息包括：所述第一MBMS业务对应的路由地址和/或所述第一MBMS业务对应的业务标识。
  17. 根据权利要求16所述的方法，其特征在于，所述第一信息还包括：所述第一MBMS业务对应的路径标识；
    所述方法还包括：所述第三网络设备为所述第一网络设备配置第三信息，所述第三信息用于表示路径标识与第二网络设备之间的映射关系。
  18. 根据权利要求13至17任一项所述的方法，其特征在于，所述方法还包括：
    所述第三网络设备为所述第一网络设备配置第四信息，所述第四信息包括与所述第一MBMS业务对应的组播IP地址，所述组播IP地址用于指示所述第一网络设备发送所述第一数据包给所述终端设备。
  19. 一种数据传输方法，其特征在于，包括：
    第一网络设备以单播或组播的方式接收第四网络设备发送的第二数据包，所述第二数据包为第三多媒体广播组播业务MBMS业务的数据包；
    所述第一网络设备将所述第二数据包以单播或组播的方式发送给接入所述第一网络设备的终端设备和/或第二网络设备。
  20. 根据权利要求19所述的方法，其特征在于，第一网络设备以组播的方式接收第四网络设备发送的第二数据包，包括：
    所述第一网络设备获得所述第二数据包对应的配置信息；
    所述第一网络设备根据所述配置信息，接收所述第二数据包。
  21. 根据权利要求20所述的方法，其特征在于，所述配置信息包括以下至少一种：所述第二MBMS业务对应的分组无线网络临时标识G-RNTI、接收所述第二数据包的时域位置信息、接收所述第二数据包的频域位置信息。
  22. 一种通信装置，其特征在于，包括：
    第一接收模块，用于接收第一数据包，所述第一数据包为第一多媒体广播组播业务MBMS业务的数据包，所述第一数据包携带有第一信息；
    第一发送模块，用于如果第一网络设备的第二信息与所述第一信息相匹配，则将所述第一数据包发送给接入所述第一网络设备的终端设备，所述第二信息是为所述第一网络设备预先配置的。
  23. 根据权利要求22所述的装置，其特征在于，所述第一发送模块，还用于如果所述第一网络设备的第二信息与所述第一信息相匹配，将所述第一数据包发送给N个第二网络设备，N为正整数。
  24. 根据权利要求23所述的装置，其特征在于，所述第一发送模块，还用于根据所述第一数据包，获得N+1份第一数据包；将所述N+1份第一数据包分别发送给所述终端设备以及所述N个第二网络设备。
  25. 根据权利要求22至24任一项所述的装置，其特征在于，所述装置还包括： 第二发送模块，用于如果所述第一网络设备的第二信息与所述第一信息不匹配，则将所述第一数据包发送给N个第二网络设备，N为正整数。
  26. 根据权利要求25所述的装置，其特征在于，所述第二发送模块，还用于根据所述第一数据包，获得N份第一数据包；将所述N份第一数据包分别发送给所述N个第二网络设备。
  27. 根据权利要求25或26所述的装置，其特征在于，所述第二发送模块，还用于如果所述第一网络设备的第二信息与所述第一信息不匹配，且所述第一网络设备的下一跳网络设备不可用，则丢弃所述第一数据包。
  28. 根据权利要求22至27任一项所述的装置，其特征在于，所述N个第二网络设备为所述第一网络设备的所有下一跳网络设备。
  29. 根据权利要求22至28任一项所述的装置，其特征在于，所述第一信息包括：所述第一MBMS业务对应的路由地址和/或所述第一MBMS业务的业务标识；
    所述第二信息包括：为所述第一网络设备配置的路由地址和/或第二MBMS业务的业务标识。
  30. 根据权利要求29所述的装置，其特征在于，所述第一信息还包括：路径标识；
    所述装置还包括：第一处理模块，用于根据所述路径标识，确定所述N个第二网络设备。
  31. 根据权利要求30所述的装置，其特征在于，所述第一处理模块，还用于所述第一网络设备获得第三信息，所述第三信息用于表示路径标识与第二网络设备之间的映射关系；根据所述路径标识以及所述第三信息，确定所述N个第二网络设备。
  32. 根据权利要求22至31任一项所述的装置，其特征在于，所述第一发送模块，具体用于在将所述第一数据包发送给所述终端设备之前，指示IP层不对所述第一数据包进行第一处理，所述第一处理包括根据所述第一数据包携带的IP地址对所述第一数据包进行筛选或者丢弃所述第一数据包；或者，将所述第一数据包的IP地址修改为第一IP地址，所述第一IP地址是为所述第一网络设备预先配置的IP地址。
  33. 根据权利要求22至32任一项所述的装置，其特征在于，所述第一发送模块，还用于获得第四信息，所述第四信息包括为所述第一网络设备配置的组播IP地址；根据所述组播IP地址将所述第一数据包发送给所述终端设备。
  34. 一种通信装置，其特征在于，包括：
    第二处理模块，用于为第一多媒体广播组播业务MBMS业务的第一数据包配置对应的第一信息；
    第三发送模块，用于将所述第一数据包发送给第一网络设备，所述第一数据包携带有所述第一信息，所述第一信息用于触发所述第一网络设备执行如下至少一种操作： 向接入所述第一网络设备的终端设备发送所述第一数据包，向N个第二网络设备发送所述第一数据包，丢弃所述第一数据包。
  35. 根据权利要求34所述的装置，其特征在于，所述第二处理模块，还用于为所述第一网络设备配置第二信息，所述第二信息与第二MBMS业务对应。
  36. 根据权利要求34或35所述的装置，其特征在于，所述第二信息包括：为所述第一网络设备配置的路由地址和/或第二MBMS业务的业务标识。
  37. 根据权利要求34至36任一项所述的装置，其特征在于，所述第一信息包括：所述第一MBMS业务对应的路由地址和/或所述第一MBMS业务对应的业务标识。
  38. 根据权利要求37所述的装置，其特征在于，所述第一信息还包括：所述第一MBMS业务对应的路径标识；
    所述第二处理模块，还用于为所述第一网络设备配置第三信息，所述第三信息用于表示路径标识与第二网络设备之间的映射关系。
  39. 根据权利要求34至38任一项所述的装置，其特征在于，所述第二处理模块，还用于为所述第一网络设备配置第四信息，所述第四信息包括与所述第一MBMS业务对应的组播IP地址，所述组播IP地址用于指示所述第一网络设备发送所述第一数据包给所述终端设备。
  40. 一种通信装置，其特征在于，包括：
    第二接收模块，用于以单播或组播的方式接收第四网络设备发送的第二数据包，所述第二数据包为第三多媒体广播组播业务MBMS业务的数据包；
    第四发送模块，用于将所述第二数据包以单播或组播的方式发送给接入所述第一网络设备的终端设备和/或第二网络设备。
  41. 根据权利要求40所述的装置，其特征在于，所述第四发送模块，具体用于获得所述第二数据包对应的配置信息；根据所述配置信息，接收所述第二数据包。
  42. 根据权利要求41所述的装置，其特征在于，所述配置信息包括以下至少一种：所述第三MBMS业务对应的分组无线网络临时标识G-RNTI、接收所述第二数据包的时域位置信息、接收所述第二数据包的频域位置信息。
  43. 一种网络设备，其特征在于，包括：处理器和存储器；处理器与存储器耦合，处理器被配置为读取并执行存储器中的指令，以实现如权利要求1至12和/或19至21所述的数据传输方法。
  44. 一种网络设备，其特征在于，包括：处理器和存储器；处理器与存储器耦合，处理器被配置为读取并执行存储器中的指令，以实现如权利要求13至18所述的数据传输方法。
  45. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有指 令，当所述指令在计算机上运行时，用于执行如权利要求1至12、19至21和/或13至18任一项所述的数据传输方法。
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