WO2023010364A1 - 集成的接入和回传的通信装置以及方法 - Google Patents

集成的接入和回传的通信装置以及方法 Download PDF

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Publication number
WO2023010364A1
WO2023010364A1 PCT/CN2021/110683 CN2021110683W WO2023010364A1 WO 2023010364 A1 WO2023010364 A1 WO 2023010364A1 CN 2021110683 W CN2021110683 W CN 2021110683W WO 2023010364 A1 WO2023010364 A1 WO 2023010364A1
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Prior art keywords
tnl
tunnel
address
host
unit
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PCT/CN2021/110683
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English (en)
French (fr)
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路杨
易粟
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富士通株式会社
路杨
易粟
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Application filed by 富士通株式会社, 路杨, 易粟 filed Critical 富士通株式会社
Priority to PCT/CN2021/110683 priority Critical patent/WO2023010364A1/zh
Priority to CN202180101213.1A priority patent/CN117796000A/zh
Publication of WO2023010364A1 publication Critical patent/WO2023010364A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer

Definitions

  • the embodiment of the present application relates to the communication field.
  • Ultra-dense networks are one of the goals of 5G. Deploying a new wireless (NR, new radio) network that does not require wired backhaul is essential for achieving 5G ultra-dense Networking is very important. Since 5G mmWave reduces the coverage area of the cell, the wireless self-backhaul system requires multiple hops to meet the deployment requirements. 5G's high bandwidth, massive multiple-input multiple-output (MIMO) and beam system make it easier for 5G than LTE to develop a wireless self-backhaul system for ultra-dense NR cells. In order to develop this multi-hop system with wireless self-backhaul, 3GPP started the research and standardization of the integrated access and backhaul (IAB, Integrated access and backhaul) project in R16.
  • IAB integrated access and backhaul
  • Fig. 1 is a schematic diagram of the IAB system, as shown in Fig. 1, in the IAB system, the relay node supports access (access) and backhaul (backhaul) functions at the same time, and the wireless transmission link of the relay node is in the time domain, The access link and the backhaul link are multiplexed in the frequency domain or air domain, and the access link and the backhaul link can use the same or different frequency bands.
  • a relay node refers to an IAB-node (IAB node), which supports both access and backhaul functions.
  • IAB node The last hop access node on the network side is called IAB-donnor (IAB host), which supports gNB function and supports IAB-node access. All UE data can be sent back to IAB-Donor via IAB-node via one or more hops.
  • IAB-node The function of IAB-node is divided into two parts, one part is gNB-DU function, called IAB-DU (distribution unit), and the other part is UE function, called IAB-MT (mobile terminal).
  • the IAB-DU implements the network-side device function, connects to the downstream child IAB-node (child IAB node), provides NR air interface access to the UE and the downstream child IAB-node, and establishes an F1 connection with the IAB Donor-CU.
  • IAB-MT implements part of the terminal equipment functions and connects to the upstream parent IAB-node (parent IAB node) or IAB-Donor DU.
  • IAB-MT includes physical layer, layer 2, RRC (Radio Resource Control, radio resource control) and NAS (Non-Access Stratum, non-access stratum) layer function, and indirectly connected to IAB Donor-CU and core network (Core Network, CN).
  • the IAB-node can access the network through the independent networking (SA, Standalone) mode or the non-independent networking (EN-DC, E-UTRA-NRDualConnectivity) mode.
  • SA independent networking
  • EN-DC non-independent networking
  • FIG. 2 is a schematic diagram of an IAB architecture in SA mode.
  • Fig. 3 is a schematic diagram of the IAB architecture of the EN-DC mode.
  • Fig. 4 is a schematic diagram of an IAB node (IAB-node), a parent node (parent IAB-node) and a child node (child IAB-node).
  • IAB-node IAB node
  • parent IAB-node parent node
  • child IAB-node child node
  • the IAB-DU of the IAB node is connected to the IAB-MT of the child node as the network side
  • the IAB-MT of the IAB node is connected to the IAB-DU of the parent node as the terminal side.
  • FIG. 5 is a schematic diagram of the F1 user plane (F1-U) protocol stack between the IAB-DU and the IAB-Donor CU.
  • Figure 6 is a schematic diagram of the F1 control plane (F1-C) protocol stack between the IAB-DU and the IAB-Donor CU.
  • F1-U and F1-C are established on the transmission (IP) layer between IAB-DU and IAB-Donor-CU, and in Figure 5 and Figure 6, after two hops of wireless transmission and one-hop wired return.
  • the transport (IP) layer is carried on the Backhaul Adaptive Protocol (BAP) sublayer, and the BAP entity in the IAB-node implements the routing function of the IAB system, and the IAB-Donor CU provides the routing table.
  • BAP PDU Protocol Data Unit
  • RLC Radio Link Control
  • Multiple RLC channels of the backhaul link can be configured by IAB-Donor to carry different priorities and QoS (Quality of Service) ) business, the BAP entity maps the BAP PDU to different backhaul RLC channels.
  • an IAB-node of the IAB network disconnects from the original parent IAB-node, connects to the new parent IAB-node, or, when the IAB-node remains connected to the original parent node and increases the connection to a new parent node When a connection becomes a dual connection, it will cause a change in the topology of the IAB network.
  • FIG. 7 is a schematic diagram of network topology changes. As shown in Figure 7, after IAB-node5 switches from the cell under IAB-node3 to the cell under IAB-node 4, the F1 transmission path from IAB-node5 and its downstream child node IAB-node 6 to Donor-CU passes through IAB -node1 and IAB-node 2 have changed through IAB-node2 and IAB-node 4, and the network topology has changed.
  • IAB-node5 increases the connection to IAB-node 4 and becomes a dual connection
  • an F1 transmission path from IAB-node5 and its downstream child node IAB-node 6 to Donor-CU is added through IAB-node1 and IAB- node 2 path, the network topology changes.
  • the IAB-node and its child nodes may not be configured with a Transmission Network Layer (TNL, Transmission Network Layer) that can be routed through the target Donor-DU (target Donor-DU) )address.
  • TNL Transmission Network Layer
  • Uplink data may be discarded by the target Donor-DU, and downlink data may be discarded by the original Donor-DU (source Donor-DU).
  • embodiments of the present application provide an IAB communication device and method.
  • an IAB communication method including:
  • the second host distribution unit receives the uplink data sent by the IAB node
  • TNL transport network layer
  • an IAB communication device including:
  • a receiving unit which receives the uplink data sent by the IAB node
  • a processing unit which adds a Transport Network Layer (TNL) tunnel-related header to the uplink data; and
  • TNL Transport Network Layer
  • a sending unit configured to send the uplink data to the first host distribution unit through the transport network layer tunnel.
  • an IAB communication method including:
  • the first host distribution unit receives the downlink data sent to the IAB node
  • TNL transport network layer
  • an IAB communication device including:
  • a receiving unit which receives downlink data sent to the IAB node
  • a processing unit which adds a Transport Network Layer (TNL) tunnel-related header to the downlink data; and
  • TNL Transport Network Layer
  • a sending unit configured to send the downlink data to the second host distribution unit through the transport network layer tunnel.
  • the second donor distribution unit adds tunnel-related headers to the uplink data, and sends uplink data to the first donor distribution unit (original donor-DU) through the TNL tunnel and/or
  • the first donor distribution unit adds a tunnel-related header to the downlink data, and sends the downlink data to the second donor distribution unit (target donor-DU) through the TNL tunnel. Therefore, establishing a TNL tunnel between the original donor-DU and the target donor-DU where the IAB-node migrates can solve the problem of discarded uplink data or downlink data.
  • Fig. 1 is a schematic diagram of the IAB system
  • FIG. 2 is a schematic diagram of the IAB architecture of the SA mode
  • FIG. 3 is a schematic diagram of the IAB architecture of the EN-DC mode
  • Fig. 4 is a schematic diagram of a parent node (parent IAB-node) and a child node (child IAB-node);
  • Fig. 5 is a schematic diagram of the F1-U protocol stack of the IAB system
  • Fig. 6 is a schematic diagram of the F1-C protocol stack of the IAB system
  • FIG. 7 is a schematic diagram of network topology changes
  • FIG. 8 is a schematic diagram of a topology adaptation process in a CU
  • FIG. 9 is a schematic diagram of an IAB communication method according to an embodiment of the present application.
  • FIG. 10 is an example diagram of activating a TNL tunnel according to an embodiment of the present application.
  • FIG. 11 is an example diagram of deactivating a TNL tunnel according to an embodiment of the present application.
  • FIG. 12 is another example diagram of activating a TNL tunnel according to an embodiment of the present application.
  • FIG. 13 is another example diagram of deactivating a TNL tunnel according to an embodiment of the present application.
  • FIG. 14 is another example diagram of activating a TNL tunnel according to an embodiment of the present application.
  • FIG. 15 is another example diagram of deactivating a TNL tunnel according to an embodiment of the present application.
  • FIG. 16 is another example diagram of activating a TNL tunnel according to an embodiment of the present application.
  • FIG. 17 is another example diagram of deactivating a TNL tunnel according to an embodiment of the present application.
  • FIG. 18 is a schematic diagram of an IAB communication method according to an embodiment of the present application.
  • FIG. 19 is a schematic diagram of an IAB communication device according to an embodiment of the present application.
  • Fig. 20 is a schematic diagram of the Donor device of the embodiment of the present application.
  • the terms “first”, “second”, etc. are used to distinguish different elements from the title, but do not indicate the spatial arrangement or time order of these elements, and these elements should not be referred to by these terms restricted.
  • the term “and/or” includes any and all combinations of one or more of the associated listed items.
  • the terms “comprising”, “including”, “having” and the like refer to the presence of stated features, elements, elements or components, but do not exclude the presence or addition of one or more other features, elements, elements or components.
  • the term “communication network” or “wireless communication network” may refer to a network conforming to any of the following communication standards, such as New Radio (NR, New Radio), Long Term Evolution (LTE, Long Term Evolution), Enhanced Long-term evolution (LTE-A, LTE-Advanced), wideband code division multiple access (WCDMA, Wideband Code Division Multiple Access), high-speed packet access (HSPA, High-Speed Packet Access), etc.
  • NR New Radio
  • New Radio Long Term Evolution
  • LTE-A Long-term evolution
  • LTE-A Long-term evolution
  • WCDMA Wideband Code Division Multiple Access
  • HSPA High-Speed Packet Access
  • the communication between devices in the communication system can be carried out according to any stage of communication protocol, for example, it can include but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and future 5G, 6G, etc., and/or other communication protocols that are currently known or will be developed in the future.
  • 1G generation
  • 2G 2.5G
  • 2.75G 3G
  • 4G 4G
  • 4.5G future 5G, 6G, etc.
  • future 5G, 6G, etc. and/or other communication protocols that are currently known or will be developed in the future.
  • Network device refers to, for example, a device in a communication system that connects a terminal device to a communication network and provides services for the terminal device.
  • Network equipment may include but not limited to the following equipment: base station (BS, Base Station), access point (AP, Access Point), transmission and reception point (TRP, Transmission Reception Point), broadcast transmitter, mobile management entity (MME, Mobile Management Entity), gateway, server, radio network controller (RNC, Radio Network Controller), base station controller (BSC, Base Station Controller) and so on.
  • the base station may include but not limited to: Node B (NodeB or NB), evolved Node B (eNodeB or eNB), and 5G base station (gNB), etc., and may also include Remote Radio Head (RRH, Remote Radio Head) , Remote Radio Unit (RRU, Remote Radio Unit), relay (relay) or low-power node (such as femto, pico, etc.).
  • NodeB Node B
  • eNodeB or eNB evolved Node B
  • gNB 5G base station
  • RRH Remote Radio Head
  • RRU Remote Radio Unit
  • relay relay
  • low-power node such as femto, pico, etc.
  • base station may include some or all of their functions, each base station may provide communication coverage for a particular geographic area.
  • the term "cell” can refer to a base station and/or its coverage area depending on the context in which the term is used.
  • the term "User Equipment” refers to, for example, a device that accesses a communication network through a network device and receives network services, and may also be called “Terminal Equipment” (TE, Terminal Equipment).
  • a terminal device may be fixed or mobile, and may also be referred to as a mobile station (MS, Mobile Station), terminal, user, subscriber station (SS, Subscriber Station), access terminal (AT, Access Terminal), station, etc. wait.
  • the terminal equipment may include but not limited to the following equipment: Cellular Phone (Cellular Phone), Personal Digital Assistant (PDA, Personal Digital Assistant), wireless modem, wireless communication equipment, handheld equipment, machine-type communication equipment, laptop computer, Cordless phones, smartphones, smart watches, digital cameras, and more.
  • Cellular Phone Cellular Phone
  • PDA Personal Digital Assistant
  • wireless modem wireless communication equipment
  • handheld equipment machine-type communication equipment
  • laptop computer Cordless phones
  • Cordless phones smartphones, smart watches, digital cameras, and more.
  • the terminal device can also be a machine or device for monitoring or measurement, such as but not limited to: a machine type communication (MTC, Machine Type Communication) terminal, Vehicle communication terminal, device to device (D2D, Device to Device) terminal, machine to machine (M2M, Machine to Machine) terminal, etc.
  • MTC Machine Type Communication
  • Vehicle communication terminal device to device (D2D, Device to Device) terminal
  • M2M Machine to Machine
  • Rel-16 NR has standardized the network topology update (topology adaptation) process when the IAB-node moves under the same donor-CU.
  • the Donor-CU configures the configuration related to network topology update for the IAB-node through the RRC reconfiguration message, so that the IAB-node performs the migration of the F1 transmission path.
  • the configuration related to network topology update includes the update of the BAP address of IAB-node, the return RLC channel (BH RLC channel) and BAP routing identifier (BAP address of Donor-DU) of uplink F1-C, F1-U and non-F1 data address and path identifier), if the target Donor-DU is different from the original donor-DU after migration, the source TNL address that can be routed through the Donor-DU needs to be updated, and the TNL address is allocated by the target Donor-DU.
  • BAP address of Donor-DU the return RLC channel
  • BAP routing identifier BAP address of Donor-DU
  • the IAB-node When the IAB-node is connected to the new parent node, it starts to apply the configuration related to the above network topology update, that is, the IaB-node starts to use the new BAP address, and the uplink F1 transmission and non-F1 transmission of the IAB-node start to use the configured BAP routing identifier and source TNL address.
  • the configuration related to network topology update is also performed in the same way.
  • FIG. 8 is a schematic diagram of an intra-CU (intra-CU) topology adaptation process. It shows the currently standardized intra-CU topology adaptation, including the switching of the IAB-MT that migrates the IAB-node and the migration process of the F1 connection between the IAB-DU and the donor-CU.
  • the source path may include at least one of source parent IAB-node, intermediate hop IAB-node on source path and source IAB-donor-DU
  • the target path may include target parent At least one of IAB-node, intermediate hop IAB-node on target path, and target IAB-donor-DU.
  • FIG. 8 is only a schematic illustration of the execution of Intra-CU topology adaptation by the IAB node, and the present application is not limited thereto. For specific content, reference may also be made to related technologies.
  • the IAB-node and its child nodes may not be configured with TNL addresses that can be routed through the target Donor-DU.
  • the upstream The source TNL address of the data still adopts the TNL address that can be routed through the original Donor-DU, that is, the TNL address allocated by the original Donor-DU.
  • these source TNL addresses are the uplink of the TNL address allocated by the original Donor-DU.
  • the data will be transmitted to the target donor-DU through the migrated path, because the data does not carry the TNL address assigned by the target Donor-DU, and will be discarded by the source TNL address filtering function of the target Donor-DU.
  • the target TNL address of the downlink data still adopts the TNL address that can be routed by the original Donor-DU, that is, the TNL address allocated by the original Donor-DU. If the target Donor-DU after IAB-node migration is different from the original Donor-DU, the downlink data whose destination TNL address is the TNL address assigned by the original Donor-DU cannot be routed to the target Donor-DU, so it will be discarded by the original Donor-DU .
  • the IAB-node and its child nodes are configured with TNL addresses that can be routed through the target Donor-DU, when the IAB-node is migrated to connect to the new parent node, there may still be some source nodes in the IAB-node and its child nodes.
  • the TNL address adopts the uplink data (UL data inflight) of the TNL address that can be routed by the original Donor-DU, that is, the source TNL address is the uplink data of the TNL address allocated by the original Donor-DU.
  • the upstream data whose source TNL address is the TNL address allocated by the original Donor-DU will be discarded by the source TNL address filtering function of the target Donor-DU.
  • target TNL addresses in the original Donor-DU that are downlink data (DL data inflight) of TNL addresses that can be routed through the original Donor-DU before migration, namely
  • the target TNL address is the downlink data of the TNL address allocated by the original Donor-DU. If the target Donor-DU after IAB-node migration is different from the original Donor-DU, the downlink data whose target TNL address is the TNL address allocated by the original Donor-DU will be discarded by the original Donor-DU.
  • an IAB node includes a migrated IAB node or its child nodes.
  • the embodiment of the present application provides an IAB communication method, and describes the transmission of uplink data from the second host distribution unit.
  • the IAB node migrates from the first host distribution unit (source donor-DU) to the second host distribution unit (target donor-DU), and a transmission network layer (TNL) is established between the first host distribution unit and the second host distribution unit. )tunnel.
  • FIG. 9 is a schematic diagram of an IAB communication method according to an embodiment of the present application. As shown in Figure 9, the method includes:
  • the second host distribution unit receives uplink data sent by the IAB node
  • the second host distribution unit adds a TNL tunnel-related header to the uplink data
  • the second host distribution unit sends uplink data to the first host distribution unit through the TNL tunnel.
  • the header includes at least one of the following: Internet Protocol (IP) header, General Packet Radio Service (GPRS) Tunneling Protocol (GTP) header, User Datagram Protocol ( UDP) header or Transmission Control Protocol (TCP) header.
  • IP Internet Protocol
  • GPRS General Packet Radio Service
  • GTP General Packet Radio Service Tunneling Protocol
  • UDP User Datagram Protocol
  • TCP Transmission Control Protocol
  • the source transport network layer (TNL) address of the header is the TNL address of the second host distribution unit or a TNL address that can be routed through the second host distribution unit, and the destination TNL address of the header is The address is the TNL address of the first host distribution unit.
  • TNL source transport network layer
  • the uplink data whose source TNL address is a TNL address that can be routed through the original Donor-DU is added by the target donor-DU with an IP header, or a GTP/UDP or TCP header, the added IP header and GTP/UDP or
  • the source TNL address in the TCP header is the TNL address of the target donor-DU or the TNL address that can be routed through the target Donor-DU
  • the target TNL address is the TNL address of the tunnel endpoint on the original donor-DU side (that is, the TNL address of the original donor-DU address).
  • a TNL tunnel is established between the original donor-DU and the target donor-DU where the IAB-node migrates.
  • the upstream data whose source TNL address is a TNL address that can be routed through the original Donor-DU is transmitted from the target donor-DU to the original donor-DU through the TNL tunnel, and then the original donor-DU
  • the DU is routed to the donor-CU, which can solve the problem that the uplink data is discarded by the target donor-DU.
  • the migrating IAB node is switched from the first host distribution unit to the second host distribution unit, or, after the radio link failure (RLF) of the migrated IAB node to the first host distribution unit, the radio resource control (RRC) Re-establish to the second DCU; wherein, the first DDU and the second DDU belong to the same Donor Centralized Unit (donor-CU).
  • RLF radio link failure
  • RRC radio resource control
  • TNL tunnel transmission is performed between the original donor-DU and the target donor-DU.
  • IAB-node performs intra-donor CU migration (intra-donor CU migration)
  • TNL tunnel transmission is performed between the original donor-DU and the target donor-DU.
  • the transmission path of all data is transferred from the original parent node of the IAB-node to the new parent node, and the donor-DU is changed from the original donor-DU to the target donor-DU.
  • uplink and downlink data will be discarded, and TNL tunnel transmission between the target donor-DU and the original Donor-DU is required.
  • the second host distribution unit receives the TNL tunnel transmission establishment request sent by the host centralization unit, and the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit; wherein, the TNL tunnel transmission establishment request uses To request the second host distribution unit to establish a TNL tunnel or activate the TNL tunnel transmission of uplink data.
  • the host centralized unit receives the handover completion message of the migrated IAB node, or, after the host centralized unit receives the RRC re-establishment complete message of the migrated IAB node, or, the host centralized unit does not provide any information for the migrated IAB node or its child nodes.
  • the second host distribution unit receives the TNL tunnel establishment request sent by the host centralization unit.
  • the TNL tunnel transmission setup request further includes at least one of the following: the source TNL address of the uplink F1 user plane that needs to be activated through the TNL tunnel, the uplink F1 control that needs to be activated through the TNL tunnel The source TNL address of the plane, the source TNL address of the uplink non-F1 data that needs to be activated through the TNL tunnel.
  • the donor-CU sends a TNL tunnel establishment request to the target donor-DU.
  • the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel on the original donor-DU side; in addition, the TNL tunnel transmission establishment request may also include the source TNL address of the F1 user plane to be uplinked, and the source TNL address of the F1 control plane to be uplinked , The source TNL address of the uplink non-F1 data.
  • F1 includes the F1 connections of the migrated IAB-node and its child nodes.
  • the second hosted distribution unit sends a TNL tunneling setup response to the hosted centralized unit, the TNL tunneling setup response including an endpoint TNL address of the TNL tunnel of the second hosted distribution unit.
  • the TNL tunnel transmission establishment response further includes at least one of the following: the source TNL address of the uplink F1 user plane that is successfully activated through the TNL tunnel, the address of the uplink F1 control plane that is successfully activated through the TNL tunnel The source TNL address, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel that is activated successfully, and the source TNL address that fails to be activated.
  • the target donor-DU sends a TNL tunneling establishment response to the donor-CU.
  • the TNL tunnel transmission establishment response includes the endpoint TNL address of the TNL tunnel on the target donor-DU side; in addition, the TNL tunnel transmission establishment response may also include the source TNL address of the successfully activated uplink F1 user plane transmitted through the tunnel, the uplink F1 control The source TNL address of the plane, the source TNL address of the uplink non-F1 data, and the source TNL address of the activation failure.
  • Fig. 10 is an example diagram of activating a TNL tunnel according to an embodiment of the present application.
  • the target donor-DU sends the uplink data configured in the TNL tunnel transmission establishment request (the source TNL address is the TNL address allocated by the original Donor-DU) through the TNL tunnel to the original donor-DU, and then can be routed to the donor-CU by the original donor-DU.
  • the source TNL address is the TNL address allocated by the original Donor-DU
  • the second host distribution unit also receives the service mapping information sent by the host centralization unit, and the service mapping information is used to configure the Backhaul Adaptive Protocol (BAP) routing identifier of the downlink data transmitted through the TNL tunnel and the first Two backhaul RLC channels between the host distribution unit and the next-hop child node.
  • BAP Backhaul Adaptive Protocol
  • the donor-CU also configures service mapping information for the activated downlink data transmitted through the TNL tunnel.
  • the service mapping information includes the TNL address of the downlink data and the BAP destination address and path identifier corresponding to the DSCP (Differentiated Services Code Point, Differentiated Services Code Point), the TNL address and DSCP of the downlink data are mapped to the target donor-DU and the next hop IAB -Returning the identification of the RLC channel between nodes, so that the target Donor-DU sends the downlink data transmitted by these TNL tunnels to the migration IaB-node or its child nodes.
  • DSCP Differentiated Services Code Point
  • the donor-CU configures the IAB-node with the TNL address assigned by the target donor-DU (i.e. the TNL address routed through the target donor-DU)
  • the uplink data carrying the TNL address assigned by the target donor-DU will not be sent by the target
  • the donor-DU is discarded, that is, it can be successfully sent to the donor-CU without passing through the TNL tunnel transmission, and the donor-CU can trigger an update or release the TNL tunnel transmission for the related uplink data.
  • the IAB-node includes the migration IAB-node or its child nodes.
  • the second host distribution unit receives the TNL tunnel transmission update or release request sent by the host centralized unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit; the TNL tunnel The transmission update or release request is used to request the second master unit to deactivate the TNL tunnel transmission of uplink data or release the TNL tunnel.
  • the second host distribution unit receives the TNL tunnel transmission update or release request sent by the host centralization unit.
  • the donor-CU configures the migrating IAB-node with a TNL address for F1-C and non-F1 data that can be routed through the target donor-DU, after the preset time for switching is completed , the donor-CU deactivates the TNL tunnel transmission for the F1-C and non-F1 data of the migrated IAB-node.
  • the donor-CU configures the migrated IAB-node with the TNL address for F1-U data that can be routed through the target donor-DU through the RRC reconfiguration message.
  • the donor-CU deactivates the TNL tunnel transmission to the F1-U of the migrated IAB-node.
  • the donor-CU configures the IAB-node with the TNL address assigned by the target donor-DU for a preset time, it triggers to update or release the TNL Tunneling.
  • the TNL tunnel transmission update or release request further includes at least one of the following: the source TNL address of the uplink F1 user plane transmitted through the TNL tunnel needs to be deactivated, and the source TNL address of the uplink F1 control plane transmitted through the TNL tunnel needs to be deactivated.
  • the donor-CU sends a TNL tunnel transmission update or release request to the target donor-DU; the TNL tunnel transmission update or release request contains the endpoint TNL address of the TNL tunnel on the original donor-DU side; in addition, the TNL tunnel transmission update or release
  • the request may also include the source TNL address of the uplink F1 user plane that needs to be deactivated through the tunnel, the source TNL address of the uplink F1 control plane that needs to be deactivated through the tunnel, and the source TNL of the uplink non-F1 data that needs to be deactivated through the tunnel address.
  • F1 includes the F1 connections of the migrated IAB-node and its child nodes.
  • the second hosted distribution unit sends a TNL tunneling update or release response to the hosted centralized unit, the TNL tunneling update or release response including an endpoint TNL address of the TNL tunnel of the second hosted distribution unit.
  • the TNL tunnel transmission update or release response further includes at least one of the following: the source TNL address of the uplink F1 user plane that is successfully deactivated through the TNL tunnel, the uplink F1 control address that is successfully deactivated through the TNL tunnel The source TNL address of the plane, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel that is successfully deactivated, and the source TNL address of the failed deactivation.
  • the target donor-DU sends a TNL tunnel transmission update or release response to the donor-CU;
  • the TNL tunnel transmission update or release response contains the endpoint TNL address of the TNL tunnel on the target donor-DU side; in addition, the TNL tunnel transmission update or release
  • the response may also contain the source TNL address of the successfully deactivated tunneled uplink F1 user plane, the successfully deactivated tunneled uplink F1 control plane source TNL address, the successfully deactivated tunneled uplink non-F1 data
  • the source TNL address of the device and the source TNL address of the deactivation failure are examples of the device that the successfully deactivated tunneled uplink F1 user plane.
  • Fig. 11 is an example diagram of deactivating a TNL tunnel according to an embodiment of the present application.
  • the target donor-DU will not remove the uplink data configured in the TNL tunnel transmission update or release request from the TNL tunnel transmission (the source TNL address is The TNL address assigned by the original Donor-DU) is sent to the original Donor-DU through the TNL tunnel, but is discarded directly.
  • the second host distribution unit also receives the service mapping information release indication sent by the host centralization unit, and the service mapping information release indication is used to release and deactivate the BAP routing identifier of the downlink data transmitted through the TNL tunnel and the second host Configuration of the backhaul RLC channel between the distribution unit and the next-hop child node.
  • the IAB-node can also send the TNL address of the applied uplink and downlink data to the donor-CU through the F1 connection control plane signaling (F1AP).
  • F1AP F1 connection control plane signaling
  • the applied TNL addresses allocated by the target donor-DU for the F1 user plane, F1 control plane, and non-F1 data, and the TNL addresses previously used by these data can be sent to the donor-CU TNL address). So that the donor-CU triggers a request to the target donor-DU and the original donor-DU to remove these data from the TNL tunnel transmission.
  • the donor-CU also needs to reconfigure the service mapping information for the downlink data that has been configured with the TNL address allocated by the target donor-DU, including configuring the new TNL address of the downlink data and the corresponding DSCP.
  • the donor-CU also needs to remove the previous business mapping information.
  • scenario 2 the uplink data transmission of the intra-donor CU dual connection scenario (which may be referred to as scenario 2) will be described.
  • the IAB node performs multipath distribution within a donor centralized unit (intra-donor CU), and the first donor distribution unit and the second donor distribution unit belong to the same donor centralized unit (donor-CU). ).
  • TNL tunnel transmission is performed between the original donor-DU and the target donor-DU.
  • part of the data transmission path is transferred from the original parent node of the IAB-node to the new parent node, and the donor-DU changes from the original donor-DU to the target donor-DU ; while the other part of the data transmission path is still transmitted through the original parent node and the original donor-DU.
  • the uplink and downlink data will be discarded, and TNL tunnel transmission between the target donor-DU and the original Donor-DU is required .
  • the second host distribution unit receives the TNL tunnel transmission establishment request sent by the host centralized unit, and the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit; wherein, the TNL tunnel transmission establishment request It is used to request the second host distribution unit to establish a TNL tunnel or activate TNL tunnel transmission of uplink data.
  • the Backhaul Adaptive Protocol (BAP) route of the IAB node is configured as the BAP route identifier of the second host distribution unit in the host centralized unit, but the TNL allocated by the second host distribution unit is not configured In the case of an address, the second host distribution unit receives the TNL tunnel transmission establishment request sent by the host centralization unit.
  • the above-mentioned IAB nodes include migrating IAB nodes or their child nodes.
  • the donor-CU configures the BAP route of the uplink F1 control plane of the IAB node and non-F1 data as the BAP address and path identifier of the target donor-DU, or, when the donor-CU is configured for the IAB-node, the target donor -
  • the donor -CU triggers establishment of TNL tunnel transmission.
  • the above-mentioned TNL tunnel transmission establishment request further includes at least one of the following: the source TNL address of the uplink F1 user plane that needs to be activated through the TNL tunnel, the source of the uplink F1 control plane that needs to be activated through the TNL tunnel.
  • TEID Tunnel Endpoint Identifier
  • the donor-CU sends a TNL tunnel establishment request to the target donor-DU;
  • the TNL tunnel establishment request includes the endpoint TNL address of the TNL tunnel on the original donor-DU side; in addition, the TNL tunnel establishment request may also include the The source TNL address of the uplink F1 user plane to be transmitted through the tunnel, the source TNL address of the uplink F1 control plane to be transmitted through the tunnel, and the source TNL address of the uplink non-F1 data to be transmitted through the tunnel.
  • F1 includes the F1 connections of the migrated IAB-node and its child nodes. It is worth noting that because the minimum granularity of uplink F1 user plane path distribution is UE bearer, different UE bearers use different GTP-U tunnels, when requesting uplink F1 user plane TNL tunnel transmission, in addition to indicating the source TNL address, it is also necessary to indicate UL GTP TEID.
  • the second hosted distribution unit sends a TNL tunneling setup response to the hosted centralized unit, the TNL tunneling setup response including an endpoint TNL address of the TNL tunnel of the second hosted distribution unit.
  • the TNL tunnel transmission establishment response further includes at least one of the following: the source TNL address of the uplink F1 user plane that is successfully activated through the TNL tunnel, the address of the uplink F1 control plane that is successfully activated through the TNL tunnel The source TNL address, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel that is activated successfully, and the source TNL address that fails to be activated.
  • the target donor-DU sends a TNL tunneling setup response to the donor-CU;
  • the TNL tunneling setup response includes the endpoint TNL address of the TNL tunnel on the target donor-DU side; in addition, the TNL tunneling setup response may also include successful activation
  • Fig. 12 is an example diagram of activating a TNL tunnel according to an embodiment of the present application.
  • the target donor-DU sends the uplink data configured in the TNL tunnel transmission establishment request (the source TNL address is the TNL address allocated by the original Donor-DU) through the TNL tunnel to the original donor-DU, and then can be routed to the donor-CU by the original donor-DU.
  • the source TNL address is the TNL address allocated by the original Donor-DU
  • the second host distribution unit also receives the service mapping information configured by the host centralization unit, and the service mapping information is used to configure the BAP routing identifier of the downlink data transmitted through the TNL tunnel and the second host distribution unit and the next hop Backhaul RLC channel between nodes.
  • the donor-CU also configures the service mapping information of the downlink data for which the destination TNL address configured in the TNL tunnel transmission establishment request is the TNL address allocated by the original Donor-DU, including the TNL address and DSCP of the downlink data
  • the corresponding BAP destination address and path identifier, TNL address of downlink data and DSCP are mapped to the identifier of the return RLC channel between the target donor-DU and the next hop IAB-node, so that the target Donor-DU can transmit these TNL tunnels
  • the downlink data is sent to the migration IAB-node or its child nodes.
  • the second host distribution unit receives the TNL tunnel transmission update or release request sent by the host centralized unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit; the TNL tunnel transmission update Or the release request is used to request the second master unit to deactivate the TNL tunnel transmission of uplink data or release the TNL tunnel.
  • the second hosting distribution unit receives the TNL tunnel transmission update or release request sent by the hosting central unit.
  • the TNL address carrying the TNL address assigned by the target donor-DU can be successfully sent to donor-CU or IAB-node without TNL transmission, and donor-CU can trigger update or release TNL tunnel transmission for related uplink and downlink data.
  • the migrating IAB-node is connected to the new parent node, after establishing a dual connection with the new parent node, its F1 control plane data and non-F1 data are migrated to the target donor-DU.
  • the donor-CU is the migrating IAB-node’s
  • the donor-CU deactivates the TNL tunnel transmission for the F1-C and non-F1 data of the migrated IAB-node.
  • the TNL tunnel transmission update or release request further includes at least one of the following: the source TNL address of the uplink F1 user plane transmitted through the TNL tunnel needs to be deactivated, and the source TNL address of the uplink F1 control plane transmitted through the TNL tunnel needs to be deactivated.
  • the donor-CU sends a TNL tunnel transmission update or release request to the target donor-DU; the TNL tunnel transmission update or release request contains the endpoint TNL address of the TNL tunnel on the original donor-DU side; in addition, the TNL tunnel transmission update or release
  • the request may also include the source TNL address of the uplink F1 user plane that needs to be deactivated through the tunnel, the source TNL address of the uplink F1 control plane that needs to be deactivated through the tunnel, and the source TNL of the uplink non-F1 data that needs to be deactivated through the tunnel address.
  • F1 includes the F1 connections of the migrated IAB-node and its child nodes.
  • the second hosted distribution unit sends a TNL tunneling update or release response to the hosted centralized unit, the TNL tunneling update or release response including an endpoint TNL address of the TNL tunnel of the second hosted distribution unit.
  • the TNL tunnel transmission update or release response further includes at least one of the following: the source TNL address of the uplink F1 user plane that is successfully deactivated through the TNL tunnel, the uplink F1 control address that is successfully deactivated through the TNL tunnel The source TNL address of the plane, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel that is successfully deactivated, and the source TNL address of the failed deactivation.
  • the target donor-DU sends a TNL tunnel transmission update or release response to the donor-CU;
  • the TNL tunnel transmission update or release response contains the endpoint TNL address of the TNL tunnel on the target donor-DU side; in addition, the TNL tunnel transmission update or release
  • the response may also include the source TNL address of the successfully deactivated uplink F1 user plane through the tunnel, the successfully deactivated uplink F1 control plane source TNL address through the tunnel, and the source of the successfully deactivated uplink non-F1 data through the tunnel TNL address, source TNL address of deactivation failure.
  • Fig. 13 is an example diagram of deactivating a TNL tunnel according to an embodiment of the present application. As shown in Figure 13, after the TNL tunnel transmission of the target donor-DU is updated or released, the target donor-DU will not send the uplink data removed from the TNL tunnel transmission to the original donor-DU through the TNL tunnel, but directly discard it.
  • the second host distribution unit further receives the service mapping information release indication sent by the host centralization unit, and the service mapping information release indication is used to release and deactivate the BAP routing identifier of the downlink data transmitted through the TNL tunnel and The configuration of the backhaul RLC channel between the second host distribution unit and the next-hop child node.
  • the IAB node may also send the applied TNL address of uplink and downlink data to the donor-CU through F1 connection control plane signaling (F1AP).
  • F1AP F1 connection control plane signaling
  • the applied TNL addresses allocated by the target donor-DU for the F1 user plane, F1 control plane, and non-F1 data, and the TNL addresses previously used by these data can be sent to the donor-CU TNL address). So that the donor-CU triggers a request to the target donor-DU and the original donor-DU to remove these data from the TNL tunnel transmission.
  • the donor-CU also reconfigures the service mapping information for the downlink data that has been configured with the TNL address assigned by the target donor-DU, including configuring the new TNL address of the downlink data and the BAP corresponding to the DSCP The destination address and path identifier, the TNL address of the downlink data, and the identifier of the return RLC channel between the target donor-DU and the next-hop IAB-node mapped by DSCP.
  • the donor-CU also removes the service mapping information before the downlink data (that is, when it is transmitted through the TNL tunnel).
  • the IAB node switches from the first host distribution unit to the second host distribution unit, or RRC re-establishes to the second host distribution unit after a radio link failure (RLF) between the IAB node and the first host distribution unit Units, the first host distribution unit belongs to the first host concentration unit, and the second host distribution unit belongs to the second host concentration unit.
  • RLF radio link failure
  • TNL tunnel transmission is performed between the original donor-DU and the target donor-DU.
  • the original donor-DU is controlled by the original donor-CU
  • the target donor-DU is controlled by the target donor-CU.
  • the transmission path of all data is migrated from the original donor-CU side of the IAB-node to the target donor-CU side, and the donor-DU is changed from the original donor-DU to the target donor -DU, regardless of whether the migrating IAB-node and child nodes are configured with TNL addresses assigned by the target donor-DU, uplink and downlink data will be discarded, and TNL tunnel transmission between the target donor-DU and the original Donor-DU is required.
  • the second host distribution unit receives the TNL tunnel transmission establishment request sent by the second host concentration unit, and the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit; wherein, the TNL tunnel transmission establishment The request is used to request the second host distribution unit to establish a TNL tunnel or activate TNL tunnel transmission of uplink data.
  • the second host distribution unit receives the TNL tunnel establishment request sent by the second host centralization unit.
  • the Handover Request message sent by the original donor-CU to the target donor-CU for the migrated IAB-node contains the endpoint TNL address of the TNL tunnel on the original donor-DU side, the F1 user of the migrated IAB-node assigned by the original donor-DU plane, F1 control plane and non-F1 data used TNL address, or, also includes the TNL address used by the F1 user plane, F1 control plane and non-F1 data allocated by the original donor-DU of the migrated IAB-node sub-node.
  • the Handover Response message for the migrated IAB-node sent by the target donor-CU to the original donor-CU includes the endpoint TNL address of the TNL tunnel on the target donor-DU side.
  • the TNL tunnel transmission establishment request further includes at least one of the following: the source TNL address of the uplink F1 user plane that needs to be activated through the TNL tunnel, the source TNL address of the uplink F1 control plane that needs to be activated through the TNL tunnel, The source TNL address of the upstream non-F1 data transmitted through the TNL tunnel needs to be activated.
  • the target donor-CU receives the handover completion message sent by the migrating IAB-node, and sends a TNL tunnel transmission establishment request to the target donor-DU.
  • the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel on the original donor-DU side; in addition, the TNL tunnel transmission establishment request may also include the source TNL address of the uplink F1 user plane, the source TNL address of the uplink F1 control plane, the uplink Source TNL address of non-F1 data.
  • F1 includes the F1 connections of the migrated IAB-node and its child nodes.
  • the second hosted distribution unit sends a TNL tunneling establishment response to the second hosted centralization unit, the TNL tunneling establishment response including an endpoint TNL address of the TNL tunnel of the second hosted distribution unit.
  • the TNL tunnel transmission establishment response further includes at least one of the following: the source TNL address of the uplink F1 user plane successfully activated through the TNL tunnel, the source TNL address of the uplink F1 control plane successfully activated through the TNL tunnel address, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel that is activated successfully, and the source TNL address that fails to be activated.
  • the target donor-DU sends a TNL tunneling establishment response to the target donor-CU.
  • the TNL tunnel transmission establishment response includes the endpoint TNL address of the TNL tunnel on the target donor-DU side; in addition, the TNL tunnel transmission establishment response may also include the source TNL address of the successfully activated uplink F1 user plane transmitted through the tunnel, the successfully activated The source TNL address of the uplink F1 control plane transmitted through the tunnel, the source TNL address of the successfully activated uplink non-F1 data transmitted through the tunnel, and the source TNL address of the failed activation.
  • FIG. 14 is an example diagram of activating a TNL tunnel according to an embodiment of the present application.
  • the target donor-DU sends the uplink data configured in the TNL tunnel transmission establishment request (the source TNL address is the TNL address assigned by the original Donor-DU) through the TNL tunnel to the original donor-DU, and then can be routed to the donor-CU by the original donor-DU.
  • the source TNL address is the TNL address assigned by the original Donor-DU
  • the second host distribution unit also receives the service mapping information sent by the host centralization unit, and the service mapping information is used to configure the BAP routing identifier of the downlink data transmitted through the TNL tunnel and the second host distribution unit and the downlink Backhaul RLC channel between one-hop child nodes.
  • the target donor-CU needs to configure the service mapping information of the downlink data for which the destination TNL address configured in the TNL tunnel transmission establishment request is the TNL address allocated by the original Donor-DU, including the TNL address of the downlink data and The BAP destination address and path identifier corresponding to the DSCP, the TNL address of the downlink data, and the DSCP are mapped to the identifier of the return RLC channel between the target donor-DU and the next hop IAB-node, so that the target Donor-DU can transfer these TNL tunnels
  • the transmitted downlink data is sent to the migration IaB-node or its child nodes. Therefore, the original donor-CU also needs to send the DSCP of the downlink service of the migrated IAB-node or its child nodes to the target donor-CU, for example, through the Handover Request message.
  • the target donor-CU configures the IAB-node with the TNL address assigned by the target donor-DU (i.e. the TNL address routed through the target donor-DU)
  • the uplink and downlink data carrying the TNL address assigned by the target donor-DU does not need It can be successfully sent to the original donor-CU or IAB-node through TNL transmission.
  • the target donor-CU can trigger update or release TNL tunnel transmission for related uplink data
  • the original donor-CU can trigger update or release TNL for related downlink data. Tunneling.
  • the second host distribution unit receives the TNL tunnel transmission update or release request sent by the second host centralized unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit; the TNL tunnel The transmission update or release request is used to request the second master unit to deactivate the TNL tunnel transmission of uplink data or release the TNL tunnel.
  • the second hosting central unit configures the TNL address assigned by the second hosting distribution unit for the migrating IAB node or its child nodes, or after the preset time for the migrating IAB node to complete the handover, or, after After the re-establishment of the migrated IAB node is completed within a preset time, the second host distribution unit receives the TNL tunnel transmission update or release request sent by the second host centralization unit.
  • the target donor-CU configures the migrated IAB-node with TNL addresses for F1-C and non-F1 data that can be routed through the target donor-DU during the switching process of the migrating IAB-node, after the preset time for switching is completed, The target donor-CU and the original donor-CU deactivate the TNL tunnel transmission of the F1-C and non-F1 data of the migrated IAB-node.
  • the target donor-CU configures the migrated IAB-node with the TNL address for F1-U data that can be routed through the target donor-DU through the RRC reconfiguration message.
  • the preset time Afterwards, the target donor-CU and the original donor-CU deactivate the TNL tunnel transmission to the F1-U of the migrated IAB-node.
  • the target donor-CU configures the IAB-node with the TNL address assigned by the target donor-DU for a preset time, trigger update or release TNL tunneling.
  • the TNL tunnel transmission update or release request further includes at least one of the following: the source TNL address of the uplink F1 user plane transmitted through the TNL tunnel needs to be deactivated, and the source TNL address of the uplink F1 control plane transmitted through the TNL tunnel needs to be deactivated.
  • the target donor-CU sends a TNL tunnel transmission update or release request to the target donor-DU.
  • the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel on the original donor-DU side; in addition, the TNL tunnel transmission update or release request may also include the source TNL of the uplink F1 user plane that needs to be deactivated through the TNL tunnel transmission address, the source TNL address of the uplink F1 control plane that needs to be deactivated and transmitted through the TNL tunnel, and the source TNL address of the uplink non-F1 data that needs to be deactivated and transmitted through the TNL tunnel.
  • F1 includes the F1 connections of the migrated IAB-node and its child nodes.
  • the second hosted distribution unit sends a TNL tunneling update or release response to the second hosted centralized unit, the TNL tunneling update or release response including an endpoint TNL address of the TNL tunnel of the second hosted distribution unit.
  • the TNL tunnel transmission update or release response further includes at least one of the following: the source TNL address of the uplink F1 user plane that is successfully deactivated through the TNL tunnel, the uplink F1 control address that is successfully deactivated through the TNL tunnel The source TNL address of the plane, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel that is successfully deactivated, and the source TNL address of the failed deactivation.
  • the target donor-DU sends a TNL tunneling update or release response to the target donor-CU.
  • the TNL tunnel transmission update or release response contains the endpoint TNL address of the TNL tunnel on the target donor-DU side; in addition, the TNL tunnel transmission update or release response may also contain the source TNL of the uplink F1 user plane that was successfully deactivated through the tunnel address, the source TNL address of the uplink F1 control plane transmitted through the tunnel successfully deactivated, the source TNL address of the uplink non-F1 data transmitted through the tunnel successfully deactivated, and the source TNL address of the failed deactivation.
  • Fig. 15 is an example diagram of deactivating a TNL tunnel according to an embodiment of the present application. As shown in Figure 15, after the TNL tunnel transmission of the target donor-DU is updated or released, the target donor-DU will not deactivate the uplink data transmitted through the TNL tunnel (the source TNL address is the TNL address allocated by the original Donor-DU) through The TNL tunnel is sent to the original donor-DU, but is discarded directly.
  • the second host distribution unit also receives the service mapping information release indication sent by the host centralization unit, and the service mapping information release indication is used to release and deactivate the BAP routing identifier of the downlink data transmitted through the TNL tunnel and the first The configuration of the backhaul RLC channel between the two-host distribution unit and the next-hop child node.
  • the IAB-node can also send the TNL address of the applied uplink and downlink data to the original donor-CU through the F1 connection control plane signaling (F1AP), for example, it can Send to the original donor-CU the applied TNL address assigned by the target donor-DU for the F1 user plane, F1 control plane and non-F1 data respectively, and the TNL address previously used by these data (the TNL address assigned by the original donor-DU) . So that the original donor-CU and the target donor-DU respectively trigger requests to the original donor-DU and the target donor-DU to remove these data from the TNL tunnel transmission.
  • F1AP F1 connection control plane signaling
  • the target donor-CU also needs to reconfigure the service mapping information for the downlink data that has been configured with the TNL address allocated by the target donor-DU, including configuring the new TNL address of the downlink data and corresponding to DSCP BAP destination address and path identifier, new TNL address of downlink data, and DSCP mapping to the identifier of the return RLC channel between the target donor-DU and the next hop IAB-node.
  • the donor-CU also needs to remove the service mapping information before the downlink data.
  • the IAB node performs multi-path distribution across an inter-donor CU
  • the first inter-donor distribution unit belongs to the first inter-donor CU
  • the second inter-donor distribution unit belongs to the second Host centralized unit.
  • TNL tunnel transmission is performed between the original donor-DU and the target donor-DU.
  • the transmission path of some data is migrated from the original donor-CU side of the IAB-node to the target donor-CU side, and the donor-DU is changed from the original donor-DU to the target donor-DU, while the other part of the data transmission path is still transmitted through the original parent node and the original donor-DU.
  • the uplink and downlink data will be discarded, and TNL tunnel transmission between the target donor-DU and the original Donor-DU is required .
  • the second host distribution unit receives the TNL tunnel transmission establishment request sent by the second host concentration unit, and the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit; wherein, the TNL tunnel transmission The establishment request is used to request the second host distribution unit to establish a TNL tunnel or activate TNL tunnel transmission of uplink data.
  • the Backhaul Adaptive Protocol (BAP) route of the IAB node is configured as the BAP route identifier of the second host distribution unit in the second host centralized unit, but the TNL allocated by the second host distribution unit is not configured In the case of the address, the second host distribution unit receives the TNL tunnel transmission establishment request sent by the second host concentration unit.
  • BAP Backhaul Adaptive Protocol
  • the original donor-CU sends to the target donor-CU the endpoint TNL address of the TNL tunnel on the original donor-DU side, and requests to migrate to the uplink F1 user plane and F1 control plane of the migrated IAB-node or child node on the target donor-CU side Or non-F1 data, and the TNL address assigned to these data by the original donor-DU.
  • the target donor-CU sends the endpoint TNL address of the TNL tunnel on the target donor-DU side to the original donor-CU, for example, through the SgNB node addition response message or the SgNB node modification response message for the migrated IAB-node.
  • the target donor-CU and the original donor-CU trigger the establishment of TNL tunnel transmission.
  • the TNL tunnel transmission establishment request further includes at least one of the following: the source TNL address of the uplink F1 user plane that needs to be activated through the TNL tunnel, the source TNL address of the uplink F1 control plane that needs to be activated through the TNL tunnel Address, the source TNL address of the uplink non-F1 data that needs to be activated through the TNL tunnel, and the GTP TEID of the uplink F1 user plane that needs to be activated through the TNL tunnel.
  • the target donor-CU sends a TNL tunnel establishment request to the target donor-DU.
  • the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel on the original donor-DU side; in addition, the TNL tunnel transmission establishment request may also include the source TNL address of the uplink F1 user plane, the source TNL address of the uplink F1 control plane, the uplink Source TNL address of non-F1 data.
  • F1 includes the F1 connections of the migrated IAB-node and its child nodes. It is worth noting that since the minimum granularity of uplink F1 user plane path distribution is UE bearer, when requesting uplink F1 user plane tunnel transmission, in addition to the source TNL address, the UL GTP TEID needs to be indicated.
  • the second HDU sends a TNL tunneling establishment response to the second HCU, and the TNL tunneling establishment response includes an endpoint TNL address of the TNL tunnel of the second HDU.
  • the TNL tunnel transmission establishment response further includes at least one of the following: the source TNL address of the uplink F1 user plane successfully activated through the TNL tunnel, the uplink address of the successfully activated uplink F1 user plane transmitted through the TNL tunnel The source TNL address of the F1 control plane, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel that is successfully activated, and the source TNL address of the failed activation.
  • the target donor-DU sends a TNL tunneling establishment response to the target donor-CU.
  • the TNL tunnel transmission establishment response includes the endpoint TNL address of the TNL tunnel on the target donor-DU side; in addition, the TNL tunnel transmission establishment response may also include the source TNL address of the successfully activated uplink F1 user plane transmitted through the tunnel, the successfully activated The source TNL address of the uplink F1 control plane transmitted through the tunnel, the source TNL address of the successfully activated uplink non-F1 data transmitted through the tunnel, and the source TNL address of the failed activation.
  • Fig. 16 is an example diagram of activating a TNL tunnel according to the embodiment of the present application.
  • the target donor-DU sends the uplink data configured in the TNL tunnel transmission establishment request (the source TNL address is the TNL address assigned by the original Donor-DU) through the TNL tunnel to the original donor-DU, and then can be routed to the donor-CU by the original donor-DU.
  • the source TNL address is the TNL address assigned by the original Donor-DU
  • the second host distribution unit also receives the service mapping information sent by the host centralization unit, and the service mapping information is used to configure the BAP routing identifier of the downlink data transmitted through the TNL tunnel and the second host distribution unit and the next hop Backhaul RLC channel between nodes.
  • the target donor-CU also configures the service mapping information for activating the downlink data transmitted through the TNL tunnel, including the TNL address of the downlink data, the BAP destination address and path identifier corresponding to the DSCP, and the TNL address of the downlink data and DSCP are mapped to the identity of the return RLC channel between the target donor-DU and the next hop IAB-node, so that the target Donor-DU can send the downlink data transmitted by these TNL tunnels to the migration IaB-node or its child nodes. Therefore, the original donor-CU also sends the DSCP of the downlink service requesting migration to the target donor-CU side to the target donor-CU, for example, through the SgNB node addition response message or the SgNB node modification response message.
  • the second host distribution unit receives the TNL tunnel transmission update or release request sent by the second host centralized unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit; the TNL tunnel The transmission update or release request is used to request the second master unit to deactivate the TNL tunnel transmission of uplink data or release the TNL tunnel.
  • the target donor-CU configures the IAB-node with the TNL address assigned by the target donor-DU (that is, the TNL address routed through the target donor-DU), carry the uplink and downlink data of the TNL address assigned by the target donor-DU It can be successfully sent to the original donor-CU or IAB-node without TNL transmission.
  • the target donor-CU can trigger update or release TNL tunnel transmission for related uplink data
  • the original donor-CU can trigger update or release related downlink data. Release TNL tunneling.
  • the second host distribution unit receives the TNL tunnel transmission update sent by the second host centralization unit or release request.
  • the migrating IAB-node is connected to a new parent node, after establishing dual connections with the new parent node, F1 control plane data and non-F1 data are migrated to the target donor-DU.
  • the target donor-CU configures the TNL address assigned by the target donor-DU for the F1 control plane and non-F1 data of the migrated IAB-node, the target donor-CU and the original donor-CU deactivate the F1- TNL tunneling of C and non-F1 data.
  • the TNL tunnel transmission update or release request further includes at least one of the following: the source TNL address of the uplink F1 user plane that needs to be deactivated through the TNL tunnel, the uplink F1 control that needs to be deactivated through the TNL tunnel The source TNL address of the plane, the source TNL address of the uplink non-F1 data that needs to be deactivated through the TNL tunnel, and the GTP TEID of the uplink F1 user plane that needs to be deactivated through the TNL tunnel.
  • the target donor-CU sends a TNL tunnel transmission update or release request to the target donor-DU.
  • the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel on the original donor-DU side; in addition, the TNL tunnel transmission update or release request may also include the source TNL address of the uplink F1 user plane that needs to be deactivated through the tunnel transmission 1.
  • the source TNL address of the uplink F1 control plane transmitted through the tunnel needs to be deactivated, and the source TNL address of the uplink non-F1 data transmitted through the tunnel needs to be deactivated.
  • F1 includes the F1 connections of the migrated IAB-node and its child nodes. It is worth noting that since the minimum granularity of uplink F1 user plane path distribution is UE bearer, when requesting to remove the uplink F1 user plane from tunnel transmission, in addition to the source TNL address, the UL GTP TEID needs to be indicated.
  • the second hosted distribution unit sends a TNL tunneling update or release response to the second hosted centralized unit, the TNL tunneling update or release response including an endpoint TNL address of the TNL tunnel of the second hosted distribution unit.
  • the TNL tunnel transmission update or release response further includes at least one of the following: the source TNL address of the uplink F1 user plane that is successfully deactivated through the TNL tunnel, the uplink F1 control address that is successfully deactivated through the TNL tunnel The source TNL address of the plane, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel that is successfully deactivated, and the source TNL address of the failed deactivation.
  • the target donor-DU sends a TNL tunneling update or release response to the target donor-CU.
  • the TNL tunnel transmission update or release response contains the endpoint TNL address of the TNL tunnel on the target donor-DU side; in addition, the TNL tunnel transmission update or release response may also contain the source TNL of the uplink F1 user plane that was successfully deactivated through the tunnel address, the source TNL address of the uplink F1 control plane transmitted through the tunnel successfully deactivated, the source TNL address of the uplink non-F1 data transmitted through the tunnel successfully deactivated, and the source TNL address of the failed deactivation.
  • Fig. 17 is an example diagram of deactivating a TNL tunnel according to an embodiment of the present application. As shown in Figure 17, after the TNL tunnel transmission of the target donor-DU is updated or released, the target donor-DU will not deactivate the uplink data transmitted through the TNL tunnel (the source TNL address is the TNL address allocated by the original Donor-DU) through The TNL tunnel is sent to the original donor-DU, but is discarded directly.
  • the second host distribution unit also receives the service mapping information release indication sent by the host centralization unit, and the service mapping information release indication is used to release and deactivate the BAP routing identifier of the downlink data transmitted through the TNL tunnel and the second Configuration of the backhaul RLC channel between the host distribution unit and the next-hop child node.
  • the IAB-node can also send the TNL address of the applied uplink and downlink data to the original donor-CU through the F1 connection control plane signaling (F1AP).
  • F1AP connection control plane signaling
  • the applied TNL addresses allocated by the target donor-DU for the F1 user plane, F1 control plane, and non-F1 data, and the TNL addresses previously used by these data (allocated by the original donor-DU) can be sent to the original donor-CU. TNL address). So that the original donor-CU and the target donor-DU respectively trigger requests to the original donor-DU and the target donor-DU to remove these data from the TNL tunnel transmission.
  • the target donor-CU also reconfigures the service mapping information for the downlink data configured with the TNL address assigned by the target donor-DU, including configuring the new TNL address of the downlink data and the DSCP corresponding The BAP destination address and path identifier, the TNL address of the downlink data, and the identifier of the return RLC channel between the target donor-DU and the next-hop IAB-node mapped by DSCP.
  • the donor-CU also removes the service mapping information before the downlink data.
  • the second donor distribution unit adds tunnel-related headers to the uplink data, and sends the uplink data to the first donor distribution unit (original donor-DU) through the TNL tunnel. Therefore, establishing a TNL tunnel between the original donor-DU and the target donor-DU where the IAB-node migrates can solve the problem of discarded uplink data.
  • An embodiment of the present application provides an IAB communication method, and describes the transmission of downlink data from the first host distribution unit.
  • the IAB node migrates from the first host distribution unit (source donor-DU) to the second host distribution unit (target donor-DU), and a transmission network layer (TNL) is established between the first host distribution unit and the second host distribution unit. )tunnel.
  • FIG. 18 is a schematic diagram of an IAB communication method according to an embodiment of the present application. As shown in Figure 18, the method includes:
  • the first host distribution unit receives the downlink data sent to the IAB node;
  • the first host distribution unit adds a header related to the TNL tunnel to the downlink data
  • the first host distribution unit sends downlink data to the second host distribution unit through the TNL tunnel.
  • the header includes at least one of: an Internet Protocol (IP) header, a General Packet Radio Service (GPRS) Tunneling Protocol (GTP) header, a User Datagram Protocol (UDP) header, or a Transmission Control Protocol (TCP) header. ) header.
  • IP Internet Protocol
  • GPRS General Packet Radio Service
  • GTP General Packet Radio Service
  • UDP User Datagram Protocol
  • TCP Transmission Control Protocol
  • the source transport network layer (TNL) address of the header is the transport network layer (TNL) address of the first host distribution unit or a TNL address that can be routed through the first host distribution unit, and the destination of the header is
  • the transport network layer (TNL) address is the transport network layer (TNL) address of the second HDU.
  • the downlink data whose target TNL address is a TNL address that can be routed through the original Donor-DU adds an IP header, or adds a GTP/UDP or TCP header to the original donor-DU.
  • the source TNL address in the added IP header and GTP/UDP or TCP header is the TNL address of the original donor-DU
  • the target TNL address is the TNL address of the tunnel endpoint on the target donor-DU side (that is, the TNL address of the target donor-DU ).
  • a TNL tunnel is established between the original donor-DU and the target donor-DU where the IAB-node migrates.
  • the downlink data whose target TNL address is a TNL address that can be routed through the original Donor-DU is transmitted from the original donor-DU to the target donor-DU through the TNL tunnel, and the target donor-DU Routing to the IAB-node or sub-node through the BAP layer solves the problem that the downlink data cannot be routed to the target donor-DU and is discarded by the original donor-DU.
  • scenario 1 the downlink data transmission in the intra-donor CU migration scenario (for example, scenario 1) will be described.
  • scenario 1 For an example of activating and deactivating the TNL tunnel in scenario 1, reference may be made to FIGS. 10 and 11 .
  • the migrating IAB node switches from the first host distribution unit to the second host distribution unit, or, after migrating the IAB node to the first host distribution unit, RRC is re-established to the second host distribution unit after the wireless link fails; wherein , the first donor distribution unit and the second donor distribution unit belong to the same donor centralized unit (donor-CU).
  • TNL tunnel transmission is performed between the original donor-DU and the target donor-DU.
  • IAB-node performs intra-donor CU migration (intra-donor CU migration)
  • TNL tunnel transmission is performed between the original donor-DU and the target donor-DU.
  • the transmission path of all data is transferred from the original parent node of the IAB-node to the new parent node, and the donor-DU is changed from the original donor-DU to the target donor-DU.
  • the migrating IAB-node and child nodes are configured with TNL addresses assigned by the target donor-DU, downlink data will be discarded, and TNL tunnel transmission between the target donor-DU and the original Donor-DU is required.
  • the first host distribution unit receives the TNL tunnel transmission setup request sent by the host centralized unit, and the TNL tunnel transmission setup request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; the TNL tunnel transmission setup request is used to request The first host distribution unit establishes a TNL tunnel or activates TNL tunnel transmission of downlink data.
  • the first host distribution unit receives the TNL tunnel transmission establishment request sent by the host centralization unit.
  • the TNL tunnel transmission establishment request further includes at least one of the following: the target TNL address of the downlink F1 user plane that needs to be activated through the TNL tunnel, the target TNL address of the downlink F1 control plane that needs to be activated through the TNL tunnel, The destination TNL address of the downlink non-F1 data transmitted through the TNL tunnel needs to be activated.
  • the donor-CU sends a TNL tunnel transmission establishment request to the original donor-DU.
  • the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel on the target donor-DU side.
  • the TNL tunnel transmission establishment request may also include the target TNL address of the downlink F1 user plane, the target TNL address of the downlink F1 control plane, and the target TNL address of downlink non-F1 data.
  • F1 includes the F1 connections of the migrated IAB-node and its child nodes.
  • the first hosted distribution unit sends a TNL tunneling setup response to the hosted centralized unit, and the TNL tunneling setup response includes an endpoint TNL address of the TNL tunnel of the first hosted distribution unit.
  • the TNL tunnel transmission establishment response further includes at least one of the following: the target TNL address of the downlink F1 user plane successfully activated through the TNL tunnel, the target TNL address of the downlink F1 control plane successfully activated through the TNL tunnel address, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel that is activated successfully, and the target TNL address that fails to be activated.
  • the original donor-DU sends a TNL tunnel transmission establishment response to the donor-CU.
  • the TNL tunnel transmission establishment response includes the endpoint TNL address of the TNL tunnel on the original donor-DU side; in addition, the TNL tunnel transmission establishment response may also include the target TNL address of the successfully activated downlink F1 user plane transmitted through the tunnel, the successfully activated The target TNL address of the downlink F1 control plane transmitted through the tunnel, the target TNL address of the downlink non-F1 data transmitted through the tunnel successfully activated, and the target TNL address of the failed activation.
  • the original donor-DU sends the downlink data configured in the TNL tunnel transmission establishment request (the destination TNL address is the TNL address assigned by the original Donor-DU) to the target donor-DU through the TNL tunnel.
  • the DU can then be sent to the migration IaB-node or its child nodes after adding the BAP routing identifier by the BAP layer of the target donor-DU.
  • the first host distribution unit receives the TNL tunnel transmission update or release request sent by the host centralized unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; wherein, the TNL The tunnel transmission update or release request is used to request the first host distribution unit to deactivate the TNL tunnel transmission of downlink data or release the TNL tunnel.
  • the donor-CU configures the IAB-node with the TNL address assigned by the target donor-DU (that is, the TNL address routed by the target donor-DU)
  • the uplink and downlink data carrying the TNL address assigned by the target donor-DU does not need It can be successfully sent to donor-CU or IAB-node through TNL transmission, and donor-CU can trigger update or release TNL tunnel transmission for related uplink and downlink data.
  • the first host distribution unit receives the TNL tunnel transmission update or release request sent by the host centralization unit.
  • the donor-CU configures the migrating IAB-node with the TNL address for F1-C and non-F1 data that can be routed through the target donor-DU during the switching process of the migrating IAB-node, after the preset time of switching is completed, the donor - The CU deactivates the TNL tunneling of F1-C and non-F1 data for the migrated IAB-node.
  • the donor-CU configures the migrated IAB-node with the TNL address for F1-U data that can be routed through the target donor-DU through the RRC reconfiguration message.
  • the donor-CU deactivates the TNL tunnel transmission to the F1-U of the migrated IAB-node.
  • the donor-CU configures the IAB-node with the TNL address allocated by the target donor-DU for a preset time, then Trigger update or release TNL tunneling.
  • the TNL tunnel transmission update or release request further includes at least one of the following: the target TNL address of the downlink F1 user plane transmitted through the TNL tunnel that needs to be deactivated, the target TNL address of the downlink F1 user plane that needs to be deactivated through the TNL tunnel The target TNL address of the downlink F1 control plane transmitted by the tunnel, and the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel that needs to be deactivated.
  • the donor-CU sends a TNL tunnel transmission update or release request to the original donor-DU.
  • the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel on the target donor-DU side; in addition, the TNL tunnel transmission update or release request may also include the target TNL address of the downlink F1 user plane that needs to be deactivated through the tunnel transmission 1.
  • the target TNL address of the downlink F1 control plane transmitted through the tunnel needs to be deactivated, and the target TNL address of the downlink non-F1 data transmitted through the tunnel needs to be deactivated.
  • F1 includes the F1 connections of the migrated IAB-node and its child nodes.
  • the first hosted distribution unit sends a TNL tunneling update or release response to the hosted centralized unit, the TNL tunneling update or release response including an endpoint TNL address of the first hosted distribution unit's TNL tunnel.
  • the TNL tunnel transmission update or release response further includes at least one of the following: successfully deactivating the target TNL address of the downlink F1 user plane transmitted through the TNL tunnel, successfully deactivating the downlink F1 control address transmitted through the TNL tunnel The target TNL address of the plane, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel that is successfully deactivated, and the target TNL address of the failed deactivation.
  • the original donor-DU sends a TNL tunnel transmission update or release response to the donor-CU.
  • the TNL tunnel transmission update or release response contains the endpoint TNL address of the TNL tunnel on the original donor-DU side; in addition, the TNL tunnel transmission update or release response may also contain the target TNL address of the downlink F1 user plane successfully deactivated through the tunnel 1. Successfully deactivate the target TNL address of the downlink F1 control plane transmitted through the tunnel, successfully deactivate the target TNL address of the downlink non-F1 data transmitted through the tunnel, and deactivate the target TNL address of the failed deactivation.
  • the original donor-DU will not send the deactivated downlink data transmitted through the TNL tunnel (the destination TNL address is the TNL address assigned by the original Donor-DU) through the TNL tunnel to the target donor-DU, but discarded directly.
  • scenario 2 the downlink data transmission in the intra-donor CU dual connection scenario (for example, scenario 2) will be described.
  • scenario 2 For an example of activating and deactivating the TNL tunnel in scenario 2, reference may be made to FIGS. 12 and 13 .
  • the IAB node performs multipath distribution within a donor centralized unit (intra-donor CU), and the first donor distribution unit and the second donor distribution unit belong to the same donor centralized unit (donor-CU). ).
  • TNL tunnel transmission is performed between the original donor-DU and the target donor-DU.
  • part of the data transmission path is transferred from the original parent node of the IAB-node to the new parent node, and the donor-DU changes from the original donor-DU to the target donor-DU , while the other part of the data transmission path is still transmitted through the original parent node and the original donor-DU.
  • the downlink data will be discarded, and TNL tunnel transmission between the target donor-DU and the original Donor-DU is required.
  • the first host distribution unit receives the TNL tunnel transmission setup request sent by the host centralized unit, and the TNL tunnel transmission setup request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; the TNL tunnel transmission setup request is used to request The first host distribution unit establishes the TNL tunnel or activates the TNL tunnel transmission of downlink data.
  • the Backhaul Adaptive Protocol (BAP) route of the IAB node is configured as the BAP route identifier of the second host distribution unit in the host centralized unit, but the TNL address assigned by the second host distribution unit is not configured
  • the first host distribution unit receives the TNL tunnel transmission establishment request sent by the host centralization unit.
  • the donor-CU configures a BAP address for the IAB-node that can be routed through the target donor-DU and sets the IAB-node’s
  • the donor-CU triggers the establishment of a TNL tunnel transmission.
  • the TNL tunnel transmission establishment request further includes at least one of the following: the target TNL address of the downlink F1 user plane that needs to be activated through the TNL tunnel, the target TNL address of the downlink F1 control plane that needs to be activated through the TNL tunnel address, the target TNL address of the downlink non-F1 data that needs to be activated through the tunnel through the TNL, and the GTP TEID of the downlink F1 user plane that needs to be activated through the TNL tunnel.
  • the donor-CU sends a TNL tunnel transmission establishment request to the original donor-DU.
  • the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel on the target donor-DU side; in addition, the TNL tunnel transmission establishment request may also include the target TNL address of the downlink F1 user plane that needs to be transmitted through the tunnel, and the TNL address that needs to be transmitted through the tunnel.
  • the target TNL address of the downlink F1 control plane, and the target TNL address of the downlink non-F1 data that needs to be transmitted through the tunnel.
  • F1 includes the F1 connections of the migrated IAB-node and its child nodes. It is worth noting that because the minimum granularity of downlink F1 user plane path distribution is UE bearer, when requesting downlink F1 user plane tunnel transmission, in addition to the destination TNL address, the DL GTP TEID needs to be indicated.
  • the first hosted distribution unit sends a TNL tunneling setup response to the hosted centralized unit, and the TNL tunneling setup response includes an endpoint TNL address of the TNL tunnel of the first hosted distribution unit.
  • the TNL tunnel transmission establishment response further includes at least one of the following: the target TNL address of the downlink F1 user plane successfully activated through the TNL tunnel, the target TNL address of the downlink F1 control plane successfully activated through the TNL tunnel address, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel that is activated successfully, and the target TNL address that fails to be activated.
  • the original donor-DU sends a TNL tunnel transmission establishment response to the donor-CU.
  • the TNL tunnel transmission establishment response includes the endpoint TNL address of the TNL tunnel on the original donor-DU side; in addition, the TNL tunnel transmission establishment response may also include the target TNL address of the successfully activated downlink F1 user plane transmitted through the tunnel, the successfully activated The target TNL address of the downlink F1 control plane transmitted through the tunnel, the target TNL address of the downlink non-F1 data transmitted through the tunnel successfully activated, and the target TNL address of the failed activation.
  • the original donor-DU sends the downlink data configured in the TNL tunnel transmission establishment request (the destination TNL address is the TNL address assigned by the original Donor-DU) to the target donor-DU through the TNL tunnel.
  • the DU can then be sent to the migration IaB-node or its child nodes after adding the BAP destination address and path identifier by the BAP layer of the target donor-DU.
  • the first host distribution unit receives the TNL tunnel transmission update or release request sent by the host centralized unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; wherein, the TNL The tunnel transmission update or release request is used to request the first host distribution unit to deactivate TNL transmission of downlink data or release the TNL tunnel.
  • the first host distribution unit receives the TNL tunnel transmission update or release request sent by the host centralization unit.
  • the target donor-DU that is, the TNL address routed through the target donor-DU
  • the target donor-CU can trigger an update or release the TNL tunnel transmission for the related downlink data.
  • the donor-CU deactivates the TNL tunnel transmission of the F1-C and non-F1 data of the migrating IAB-node.
  • the TNL tunnel transmission update or release request further includes at least one of the following: the target TNL address of the downlink F1 user plane transmitted through the TNL tunnel needs to be deactivated, and the target TNL address of the downlink F1 control plane transmitted through the TNL tunnel needs to be deactivated.
  • the donor-CU sends a TNL tunnel transmission update or release request to the original donor-DU.
  • the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel on the target donor-DU side; in addition, the TNL tunnel transmission update or release request may also include the target TNL address of the downlink F1 user plane that does not need to be transmitted through the tunnel, The target TNL address of the downlink F1 control plane that does not need to be transmitted through the tunnel, and the target TNL address of the downlink non-F1 data that does not need to be transmitted through the tunnel.
  • F1 includes the F1 connections of the migrated IAB-node and its child nodes. It is worth noting that since the minimum granularity of downlink F1 user plane path distribution is UE bearer, when requesting to remove the downlink F1 user plane from tunnel transmission, in addition to the destination TNL address, the DL GTP TEID needs to be indicated.
  • the first hosted distribution unit sends a TNL tunneling update or release response to the hosted centralized unit, the TNL tunneling update or release response including an endpoint TNL address of the first hosted distribution unit's TNL tunnel.
  • the TNL tunnel transmission update or release response further includes at least one of the following: successfully deactivating the target TNL address of the downlink F1 user plane transmitted through the TNL tunnel, successfully deactivating the downlink F1 control address transmitted through the TNL tunnel The target TNL address of the plane, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel that is successfully deactivated, and the target TNL address of the failed deactivation.
  • the original donor-DU sends a TNL tunnel transmission establishment response to the donor-CU.
  • the TNL tunnel transmission establishment response includes the endpoint TNL address of the TNL tunnel on the original donor-DU side; in addition, the TNL tunnel transmission establishment response may also include the target TNL address of the successfully activated downlink F1 user plane transmitted through the tunnel, the successfully activated The target TNL address of the downlink F1 control plane transmitted through the tunnel, the target TNL address of the downlink non-F1 data transmitted through the tunnel successfully activated, and the target TNL address of the failed activation.
  • the original donor-DU will not send the deactivated downlink data transmitted through the TNL tunnel (the destination TNL address is the TNL address assigned by the original Donor-DU) through the TNL tunnel to the target donor-DU, but discarded directly.
  • the downlink data transmission in the inter-donor CU migration scenario (for example, scenario 3) will be described.
  • scenario 3 For an example of activating and deactivating the TNL tunnel in scenario 3, reference may be made to FIGS. 14 and 15 .
  • the IAB node switches from the first host distribution unit to the second host distribution unit, or RRC re-establishes to the second host distribution unit after a radio link failure (RLF) from the IAB node to the first host distribution unit Units, the first host distribution unit belongs to the first host concentration unit, and the second host distribution unit belongs to the second host concentration unit.
  • RLF radio link failure
  • TNL tunnel transmission is performed between the original donor-DU and the target donor-DU.
  • the original donor-DU is controlled by the original donor-CU
  • the target donor-DU is controlled by the target donor-CU.
  • the transmission path of all data is migrated from the original donor-CU side of the IAB-node to the target donor-CU side, and the donor-DU is replaced by the original donor-DU becomes the target donor-DU, regardless of whether the migrated IAB-node and child nodes are configured with the TNL address assigned by the target donor-DU, downlink data will be discarded, and a TNL tunnel between the target donor-DU and the original Donor-DU is required transmission.
  • the first host distribution unit receives the TNL tunnel transmission establishment request sent by the first host concentration unit, and the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; the TNL tunnel transmission establishment request uses To request the first host distribution unit to establish a TNL tunnel or activate the TNL tunnel transmission of downlink data.
  • the first host distribution unit receives the TNL tunnel transmission establishment request sent by the first host concentration unit.
  • the Handover Request message sent by the original donor-CU to the target donor-CU for the migrated IAB-node contains the endpoint TNL address of the TNL tunnel on the original donor-DU side, the F1 user of the migrated IAB-node assigned by the original donor-DU plane, F1 control plane and non-F1 data used TNL address, or, also includes the TNL address used by the F1 user plane, F1 control plane and non-F1 data allocated by the original donor-DU of the migrated IAB-node sub-node.
  • the Handover Response message for the migrated IAB-node sent by the target donor-CU to the original donor-CU includes the endpoint TNL address of the TNL tunnel on the target donor-DU side.
  • the TNL tunnel transmission establishment request further includes at least one of the following: the target TNL address of the downlink F1 user plane that needs to be activated through the TNL tunnel, the target TNL address of the downlink F1 control plane that needs to be activated through the TNL tunnel, The destination TNL address of the downlink non-F1 data transmitted through the TNL tunnel needs to be activated.
  • the original donor-CU when the original donor-CU receives the IAB-node context release instruction sent by the target donor-CU, it sends a TNL tunnel transmission establishment request to the original donor-DU.
  • the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel on the target donor-DU side; in addition, the TNL tunnel transmission establishment request may also include the target TNL address of the downlink F1 user plane, the target TNL address of the downlink F1 control plane, the downlink Destination TNL address for non-F1 data.
  • F1 includes the F1 connections of the migrated IAB-node and its child nodes.
  • the first HDU sends a TNL tunneling establishment response to the first HCU, and the TNL tunneling establishment response includes an endpoint TNL address of the TNL tunnel of the first HDU.
  • the TNL tunnel transmission establishment response further includes at least one of the following: the target TNL address of the downlink F1 user plane successfully activated through the TNL tunnel, the target TNL address of the downlink F1 control plane successfully activated through the TNL tunnel The target TNL address, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel that is activated successfully, and the target TNL address that fails to be activated.
  • the original donor-DU sends a TNL tunnel transmission establishment response to the original donor-CU.
  • the TNL tunnel transmission establishment response includes the endpoint TNL address of the TNL tunnel on the original donor-DU side; in addition, the TNL tunnel transmission establishment response may also include the target TNL address of the successfully activated downlink F1 user plane transmitted through the tunnel, the successfully activated The target TNL address of the downlink F1 control plane transmitted through the tunnel, the target TNL address of the downlink non-F1 data transmitted through the tunnel successfully activated, and the target TNL address of the failed activation.
  • the original donor-DU will activate the downlink data transmitted through the TNL tunnel (the destination TNL address is the TNL address assigned by the original Donor-DU) and send it to the target donor-DU through the TNL tunnel , and then it can be sent to the migration IaB-node or its sub-nodes after adding the routing identifier by the BAP layer of the target donor-DU.
  • the first host distribution unit receives the TNL tunnel transmission update or release request sent by the first host centralized unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; wherein, The TNL tunnel transmission setup request is used to request the first host distribution unit to deactivate the TNL tunnel transmission of downlink data or release the TNL tunnel.
  • the target donor-CU configures the IAB-node with the TNL address allocated by the target donor-DU (that is, the TNL address routed by the target donor-DU)
  • the uplink and downlink data carrying the TNL address allocated by the target donor-DU will not It needs to be transmitted through the TNL tunnel to be successfully sent to the original donor-CU or IAB-node.
  • the target donor-CU can trigger update or release the TNL tunnel transmission for the relevant uplink data
  • the original donor-CU can trigger the update or release of the relevant downlink data. Release TNL tunneling.
  • the first host distribution unit receives the TNL tunnel transmission update or release request sent by the first host centralization unit.
  • the target donor-CU configures the migrated IAB-node with TNL addresses for F1-C and non-F1 data that can be routed through the target donor-DU during the switching process of the migrating IAB-node, after the preset time for switching is completed, The target donor-CU and the original donor-CU deactivate the TNL tunnel transmission of the F1-C and non-F1 data of the migrated IAB-node.
  • the target donor-CU configures the migrated IAB-node with the TNL address for F1-U data that can be routed through the target donor-DU through the RRC reconfiguration message.
  • the preset time Afterwards, the target donor-CU and the original donor-CU deactivate the TNL tunnel transmission to the F1-U of the migrated IAB-node.
  • the target donor-CU configures the IAB-node with the TNL address assigned by the target donor-DU for a preset time, trigger update or release TNL Tunneling.
  • the TNL tunnel transmission update or release request further includes at least one of the following: the target TNL address of the downlink F1 user plane transmitted through the TNL tunnel needs to be deactivated, and the target TNL address of the downlink F1 control plane transmitted through the TNL tunnel needs to be deactivated.
  • Target TNL address the target TNL address of the downlink non-F1 data that needs to be deactivated and transmitted through the TNL tunnel.
  • the target donor-CU sends the target donor-DU to the original donor-CU, which is the TNL address assigned by the F1 user plane or F1 control plane of the migrated IAB-node and non-F1 data, or also includes the target donor-DU which is the migrated IAB-node
  • the TNL address assigned by the F1 user plane or F1 control plane and non-F1 data of the child node for example, through the Handover Response message for the migration IAB-node.
  • the original donor-CU sends a TNL tunnel transmission update or release request to the original donor-DU.
  • the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel on the target donor-DU side; in addition, the TNL tunnel transmission update or release request may also include the target TNL address of the downlink F1 user plane that does not need to be transmitted through the tunnel, The target TNL address of the downlink F1 control plane that does not need to be transmitted through the tunnel, and the target TNL address of the downlink non-F1 data that does not need to be transmitted through the tunnel.
  • F1 includes the F1 connections of the migrated IAB-node and its child nodes.
  • the first hosted distribution unit sends a TNL tunneling update or release response to the first hosted centralized unit, the TNL tunneling update or release response including an endpoint TNL address of the first hosted distribution unit's TNL tunnel.
  • the TNL tunnel transmission update or release response further includes at least one of the following: successfully deactivating the target TNL address of the downlink F1 user plane transmitted through the TNL tunnel, successfully deactivating the downlink F1 control address transmitted through the TNL tunnel The target TNL address of the plane, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel that is successfully deactivated, and the target TNL address of the failed deactivation.
  • the target donor-DU sends a TNL tunneling update or release response to the target donor-CU.
  • the TNL tunnel transmission update or release response contains the endpoint TNL address of the TNL tunnel on the original donor-DU side; in addition, the TNL tunnel transmission update or release response may also contain the successfully deactivated downlink F1 user plane target TNL address, the target TNL address of the downlink F1 control plane transmitted through the tunnel successfully deactivated, the target TNL address of the downlink non-F1 data transmitted through the tunnel successfully deactivated, and the target TNL address of the failed deactivation.
  • the original donor-DU will not send the deactivated downlink data transmitted through the TNL tunnel (the destination TNL address is the TNL address assigned by the original Donor-DU) through the TNL tunnel to the target donor-DU, but discarded directly.
  • the IAB node performs multi-path distribution across an inter-donor CU
  • the first inter-donor distribution unit belongs to the first inter-donor CU
  • the second inter-donor distribution unit belongs to the second Host centralized unit.
  • TNL tunnel transmission is performed between the original donor-DU and the target donor-DU.
  • the original donor-DU is controlled by the original donor-CU
  • the target donor-DU is controlled by the target donor-CU.
  • the migrating IAB-node when the migrating IAB-node is connected to a node under the control of the target donor-CU, part of the data transmission path is migrated from the original donor-CU side of the IAB-node to the target donor-CU side, and the donor-DU is transferred from the original donor-CU side to the target donor-CU side.
  • the DU becomes the target donor-DU, while the other part of the data transmission path is still transmitted through the original parent node and the original donor-DU.
  • the TNL address assigned by the target donor-DU if the TNL address assigned by the target donor-DU is not configured, the downlink data will be discarded, and TNL tunnel transmission between the target donor-DU and the original Donor-DU is required.
  • the first host distribution unit receives the TNL tunnel transmission establishment request sent by the first host concentration unit, and the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; the TNL tunnel transmission establishment request uses To request the first host distribution unit to establish the TNL tunnel or activate the TNL tunnel transmission of downlink data.
  • the Backhaul Adaptive Protocol (BAP) route of the IAB node is configured as the BAP route identifier of the second host distribution unit in the second host central unit, but the IAB node is not configured by the second host
  • the first host distribution unit receives the TNL tunnel transmission establishment request sent by the first host centralization unit.
  • the original donor-CU sends to the target donor-CU the endpoint TNL address of the TNL tunnel on the original donor-DU side, and requests to migrate to the downlink F1 user plane and F1 control plane of the migrated IAB-node or child node on the target donor-CU side Or non-F1 data, and the TNL address assigned to these data by the original donor-DU.
  • the SgNB node addition request message or SgNB node modification request for migrating the IAB-node.
  • the target donor-CU sends the endpoint TNL address of the TNL tunnel on the target donor-DU side to the original donor-CU, for example, through the SgNB node addition response message or the SgNB node modification response message for the migrated IAB-node.
  • the target donor-CU side that is, when the target donor-CU configures the IAB-node with a BAP address that can be routed by the target donor-DU and the downlink F1 control plane of the IAB-node and non-F1 data are routed from the target donor-DU to the IAB-node, but the TNL address allocated by the target donor-DU is not configured for the IAB-node, the target donor-CU and the original donor-CU trigger the establishment of TNL tunnel transmission.
  • the TNL tunnel transmission establishment request further includes at least one of the following: the target TNL address of the downlink F1 user plane that needs to be activated through the TNL tunnel, the target TNL address of the downlink F1 control plane that needs to be activated through the TNL tunnel address, the target TNL address of the downlink non-F1 data that needs to be activated through the TNL tunnel, and the GTP TEID of the downlink F1 user plane that needs to be activated through the TNL tunnel.
  • the target donor-CU sends the uplink F1 user plane, F1 control plane or non-F1 data of the migrated IAB-node or sub-node successfully migrated to the target donor-CU side to the original donor-CU, and the downlink data of the migrated IAB-node or sub-node F1 user plane, F1 control plane or non-F1 data, or, also contain the TNL address assigned to these data by the target donor-DU, for example, through the SgNB node addition response message or SgNB node modification response message for the migration IAB-node. If the SgNB node addition response message or the SgNB node modification response message does not contain the TNL address assigned to these data by the target donor-DU, the original donor-CU sends a TNL tunnel transmission establishment request to the original donor-DU.
  • the TNL tunnel establishment request includes the endpoint TNL address of the TNL tunnel on the target donor-DU side; in addition, the TNL tunnel establishment request may also include the target TNL address of the downlink F1 user plane and the target TNL address of the downlink F1 control plane. Address, target TNL address of downlink non-F1 data.
  • F1 includes the F1 connections of the migrated IAB-node and its child nodes. It is worth noting that because the minimum granularity of downlink F1 user plane path distribution is UE bearer, when requesting downlink F1 user plane tunnel transmission, in addition to the destination TNL address, the DL GTP TEID needs to be indicated.
  • the first HDU sends a TNL tunneling establishment response to the first HCU, and the TNL tunneling establishment response includes an endpoint TNL address of the TNL tunnel of the first HDU.
  • the TNL tunnel transmission establishment response further includes at least one of the following: the target TNL address of the downlink F1 user plane successfully activated through the TNL tunnel, the target TNL address of the downlink F1 control plane successfully activated through the TNL tunnel address, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel that is activated successfully, and the target TNL address that fails to be activated.
  • the original donor-DU sends a TNL tunnel transmission establishment response to the original donor-CU.
  • the TNL tunnel transmission establishment response includes the endpoint TNL address of the TNL tunnel on the original donor-DU side; in addition, the TNL tunnel transmission establishment response may also include the target TNL address of the successfully activated downlink F1 user plane transmitted through the tunnel, the successfully activated The target TNL address of the downlink F1 control plane transmitted through the tunnel, the target TNL address of the downlink non-F1 data transmitted through the tunnel successfully activated, and the target TNL address of the failed activation.
  • the original donor-DU will activate the downlink data transmitted through the TNL tunnel (the destination TNL address is the TNL address assigned by the original Donor-DU) and send it to the target donor-DU through the TNL tunnel , and then sent to the migration IaB-node or its sub-nodes after adding the BAP routing identifier by the BAP layer of the target donor-DU.
  • the first host distribution unit receives the TNL tunnel transmission update or release request sent by the first host centralized unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; wherein, The TNL tunnel transmission update or release request is used to request the first host distribution unit to deactivate the TNL transmission of downlink data or release the TNL tunnel.
  • the first hosting distribution unit receives the TNL tunnel transmission update or release request sent by the first hosting central unit.
  • the target donor-CU configures the IAB-node with the TNL address assigned by the target donor-DU (that is, the TNL address routed by the target donor-DU)
  • the downlink data carrying the TNL address assigned by the target donor-DU does not need It can be successfully sent to the original donor-CU or IAB-node through TNL tunnel transmission, and the original donor-CU can trigger update or release TNL tunnel transmission for related downlink data.
  • the migrating IAB-node is connected to a new parent node, after establishing dual connections with the new parent node, F1 control plane data and non-F1 data are migrated to the target donor-DU, when the target donor-CU is the F1 of the migrating IAB-node
  • the control plane and non-F1 data are configured with the TNL address assigned by the target donor-DU
  • the target donor-CU and the original donor-CU deactivate the TNL tunnel transmission for the F1-C and non-F1 data of the migrated IAB-node.
  • the TNL tunnel transmission update or release request further includes at least one of the following: the target TNL address of the downlink F1 user plane that needs to be deactivated through the TNL tunnel, the downlink F1 control that needs to be deactivated through the TNL tunnel The target TNL address of the plane, the target TNL address of the downlink non-F1 data that needs to be deactivated through the TNL tunnel, and the GTP TEID of the downlink F1 user plane that needs to be deactivated through the TNL tunnel.
  • the target donor-CU sends the target donor-DU to the original donor-CU the TNL address assigned by the F1 user plane or F1 control plane and non-F1 data of the migrated IAB-node that has been migrated to the target donor-CU side, or it also contains
  • the target donor-DU is the TNL address assigned to the F1 user plane or F1 control plane and non-F1 data of the migrated IAB-node subnode that has been migrated to the target donor-CU side.
  • the original donor-CU sends a TNL tunnel transmission update or release request to the original donor-DU.
  • the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel on the target donor-DU side; in addition, the TNL tunnel transmission update or release request may also include the target TNL address of the downlink F1 user plane that does not need to be transmitted through the tunnel, The target TNL address of the downlink F1 control plane that does not need to be transmitted through the tunnel, and the target TNL address of the downlink non-F1 data that does not need to be transmitted through the tunnel.
  • F1 includes the F1 connections of the migrated IAB-node and its child nodes. It is worth noting that since the minimum granularity of downlink F1 user plane path distribution is UE bearer, when requesting to remove the downlink F1 user plane from tunnel transmission, in addition to the destination TNL address, the DL GTP TEID needs to be indicated.
  • the first hosted distribution unit sends a TNL tunneling update or release response to the first hosted centralized unit, the TNL tunneling update or release response including an endpoint TNL address of the first hosted distribution unit's TNL tunnel.
  • the TNL tunnel transmission update or release response further includes at least one of the following: the target TNL address of the downlink F1 user plane successfully deactivated through the TNL tunnel, the downlink F1 user plane successfully deactivated through the TNL tunnel The target TNL address of the F1 control plane, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel that is successfully deactivated, and the target TNL address of the failed deactivation.
  • the original donor-DU sends a TNL tunnel transmission update or release response to the original donor-CU.
  • the TNL tunnel transmission update or release response contains the endpoint TNL address of the TNL tunnel on the original donor-DU side; in addition, the TNL tunnel transmission update or release response may also contain the successfully deactivated downlink F1 user plane target TNL address, the target TNL address of the downlink F1 control plane transmitted through the tunnel successfully deactivated, the target TNL address of the downlink non-F1 data transmitted through the tunnel successfully deactivated, and the target TNL address of the failed deactivation.
  • the original donor-DU will not send the deactivated downlink data transmitted through the TNL tunnel (the destination TNL address is the TNL address assigned by the original Donor-DU) through the TNL tunnel to the target donor-DU, but discarded directly.
  • the first donor distribution unit (original donor-DU) adds tunnel-related headers to the downlink data, and sends the downlink data to the second donor distribution unit (target donor-DU) through the TNL tunnel. Therefore, establishing a TNL tunnel between the original donor-DU and the target donor-DU where the IAB-node migrates can solve the problem of downlink data being discarded.
  • the embodiment of the present application provides an IAB communication method, which is described from the donor central unit (donor-CU), and the same content as the first and second embodiments will not be repeated.
  • the IAB node migrates from a first host distribution unit to a second host distribution unit; the first host distribution unit and the second host distribution unit belong to the same host centralized unit.
  • the IAB node performs intra-donor CU migration (Scenario 1) or intra-donor CU dual connection (Scenario 2).
  • the host centralization unit instructs the second host distribution unit to receive the uplink data sent by the IAB node, and transmit the uplink data to the first host distribution unit through the transport network layer (TNL) tunnel between the second host distribution unit and the first host distribution unit.
  • TNL transport network layer
  • the host centralization unit instructs the first host distribution unit to receive the downlink data sent to the IAB node, and send the downlink data to the second host distribution unit through the transport network layer (TNL) tunnel between the first host distribution unit and the second host distribution unit.
  • TNL transport network layer
  • the IAB node includes the migration IAB node or its child nodes.
  • an IAB node migrates from a first hosted distribution unit to a second hosted distribution unit; the first hosted distribution unit belongs to the first hosted centralized unit, and the second hosted distributed unit belongs to the second hosted centralized unit.
  • the IAB node performs inter-donor CU migration (Scenario 3) or inter-donor CU dual connection (Scenario 4).
  • the second host distribution unit instructs the second host distribution unit to receive the uplink data sent by the IAB node, and transmit the uplink data through the transport network layer (TNL) tunnel between the second host distribution unit and the first host distribution unit to The first host distribution unit sends uplink data.
  • TNL transport network layer
  • the second host centralization unit sends a TNL tunnel transmission establishment request to the second host distribution unit, and the TNL tunnel transmission establishment request includes the TNL tunnel endpoint TNL address of the first host distribution unit; wherein, the TNL tunnel transmission establishment request is used to request the second Two host distribution units establish TNL tunnels or activate TNL tunnel transmission of uplink data.
  • the TNL tunnel endpoint TNL address of the first hosting distribution unit is sent by the first hosting centralization unit to the second hosting centralization unit.
  • the second host centralization unit sends a TNL tunnel transmission establishment request to the second host distribution unit:
  • the second host centralized unit After the second host centralized unit receives the handover completion message of the migrated IAB node,
  • the second host centralized unit After the second host centralized unit receives the RRC re-establishment completion message of the migrated IAB node,
  • the second host centralization unit does not configure the TNL address assigned by the second host distribution unit for the migrated IAB node or its child nodes.
  • the second hosting central unit also receives the TNL address allocated by the first hosting distribution unit for the IAB node sent by the first hosting central unit, so that the second hosting central unit sends a TNL tunnel transmission establishment request to the second hosting distribution unit.
  • the first host distribution unit instructs the first host distribution unit to receive the downlink data sent to the IAB node, and send the downlink data to the IAB node through the transport network layer (TNL) tunnel between the first host distribution unit and the second host distribution unit.
  • TNL transport network layer
  • the first host centralization unit also sends a TNL tunnel transmission update or release request to the first host distribution unit, and the TNL tunnel transmission update or release request includes the TNL tunnel endpoint TNL address of the second host distribution unit; wherein, the TNL tunnel transmission update or The release request is used to request the first host distribution unit to deactivate the TNL tunnel transmission of downlink data or release the TNL tunnel.
  • the IAB node includes the migration IAB node or its child nodes.
  • the TNL tunnel endpoint TNL address of the second hosting distribution unit is sent by the second hosting centralization unit to the first hosting centralization unit.
  • the first hosting central unit sends a TNL tunnel transmission update or release request to the first hosting distribution unit.
  • the second host centralization unit also sends the TNL address assigned by the second host distribution unit to the IAB node to the first host centralization unit, so as to trigger the first host centralization unit to send a TNL tunnel transmission update to the first host distribution unit or release request.
  • An embodiment of the present application provides an IAB communication device, which may be, for example, an IAB-donor device in an IAB system, or may be one or some components, components or modules configured in the IAB-donor device.
  • the IAB system includes an IAB-donor device and an IAB node; the IAB-donor device may further include an IAB-donor-CU and an IAB-donor-DU.
  • FIG. 19 is a schematic diagram of an IAB communication device according to an embodiment of the present application.
  • an IAB communication device 1900 includes: a receiving unit 1901 , a processing unit 1902 and a sending unit 1903 .
  • the receiving unit 1901 receives the uplink data sent by the IAB node; the processing unit 1902 adds headers related to the transport network layer tunnel to the uplink data; and the sending unit 1903 sends the uplink data to the first host distribution unit through the transport network layer tunnel data.
  • the header includes at least one of: an Internet Protocol header, a GPRS Tunneling Protocol header, a User Datagram Protocol header, or a Transmission Control Protocol header.
  • the source transport network layer address of the header is the TNL address of the second HDU or a TNL address that can be routed through the second HDU, and the destination TNL address of the header is the TNL address of the first HDU.
  • the IAB node switches from the first host distribution unit to the second host distribution unit, or, after the wireless link between the IAB node and the first host distribution unit fails, the radio resource control is re-established to the second host distribution unit; Wherein, the first host distribution unit and the second host distribution unit belong to the same host concentration unit.
  • the receiving unit 1901 also receives the TNL tunnel transmission establishment request sent by the host centralized unit, and the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit; wherein, the TNL tunnel transmission establishment request is used for requesting the second host distribution unit to establish a TNL tunnel or activate the TNL tunnel transmission of uplink data;
  • the TNL tunnel transmission establishment request also includes at least one of the following: the source TNL address of the uplink F1 user plane that needs to be activated through the TNL tunnel, the source TNL address of the uplink F1 control plane that needs to be activated through the TNL tunnel, or the source TNL address that needs to be activated through the TNL tunnel Source TNL address of uplink non-F1 data transmitted through the tunnel.
  • the sending unit 1903 also sends a TNL tunnel transmission establishment response to the host centralized unit, where the TNL tunnel transmission establishment response includes the endpoint TNL address of the TNL tunnel of the second host distribution unit;
  • the TNL tunnel transmission establishment response also includes at least one of the following: the source TNL address of the uplink F1 user plane successfully activated through the TNL tunnel, the source TNL address of the uplink F1 control plane successfully activated through the TNL tunnel, the activation success The source TNL address of the uplink non-F1 data transmitted through the TNL tunnel, and the source TNL address of the activation failure.
  • the receiving unit 1901 also receives the service mapping information sent by the host centralization unit, and the service mapping information is used to configure the Backhaul Adaptive Protocol (BAP) routing identifier of the downlink data transmitted through the TNL tunnel and the second host distribution unit The backhaul RLC channel between the child node and the next hop.
  • BAP Backhaul Adaptive Protocol
  • the receiving unit 1901 also receives the TNL tunnel transmission update or release request sent by the host centralized unit, the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit; the TNL tunnel transmission update or The release request is used to request the second master unit to deactivate the TNL tunnel transmission of uplink data or release the TNL tunnel;
  • the TNL tunnel transmission update or release request also includes at least one of the following: the source TNL address of the uplink F1 user plane transmitted through the TNL tunnel needs to be deactivated, the source TNL address of the uplink F1 control plane transmitted through the TNL tunnel needs to be deactivated, The source TNL address of the uplink non-F1 data transmitted through the TNL tunnel needs to be deactivated.
  • the sending unit 1903 also sends a TNL tunnel transmission update or release response to the host centralized unit, where the TNL tunnel transmission update or release response includes the endpoint TNL address of the TNL tunnel of the second host distribution unit;
  • the TNL tunnel transmission update or release response further includes at least one of the following: the source TNL address of the uplink F1 user plane successfully deactivated through the TNL tunnel, the source TNL address of the uplink F1 control plane successfully deactivated through the TNL tunnel address, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel that was successfully deactivated, and the source TNL address of the failed deactivation.
  • the receiving unit 1901 also receives the service mapping information release indication sent by the host centralization unit, and the service mapping information release indication is used to release and deactivate the BAP routing identifier of the downlink data transmitted through the TNL tunnel and the second host distribution unit and Configuration of the backhaul RLC channel between next-hop child nodes.
  • the IAB node performs multipath distribution within the HCU, and the first HDU and the second HDU belong to the same HCU.
  • the receiving unit 1901 receives the TNL tunnel transmission establishment request sent by the host centralized unit, and the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit; wherein, the TNL tunnel transmission establishment request is used to request
  • the second host distribution unit establishes a TNL tunnel or activates TNL tunnel transmission of uplink data;
  • the TNL tunnel transmission establishment request also includes at least one of the following: the source TNL address of the uplink F1 user plane that needs to be activated through the TNL tunnel, the source TNL address of the uplink F1 control plane that needs to be activated through the TNL tunnel, or the source TNL address that needs to be activated through the TNL tunnel.
  • the source TNL address of the uplink non-F1 data transmitted through the tunnel and the GTP tunnel endpoint identifier of the uplink F1 user plane that needs to be activated through the TNL tunnel.
  • the sending unit 1903 also sends a TNL tunnel transmission establishment response to the host centralized unit, where the TNL tunnel transmission establishment response includes the endpoint TNL address of the TNL tunnel of the second host distribution unit;
  • the TNL tunnel transmission establishment response also includes at least one of the following: the source TNL address of the uplink F1 user plane successfully activated through the TNL tunnel, the source TNL address of the uplink F1 control plane successfully activated through the TNL tunnel, the activation success The source TNL address of the uplink non-F1 data transmitted through the TNL tunnel, and the source TNL address of the activation failure.
  • the receiving unit 1901 also receives the service mapping information configured by the host centralization unit.
  • the service mapping information is used to configure the BAP routing identifier of the downlink data transmitted through the TNL tunnel and the link between the second host distribution unit and the next hop child node.
  • the receiving unit 1901 also receives the TNL tunnel transmission update or release request sent by the host centralized unit, the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit; the TNL tunnel transmission update or The release request is used to request the second master unit to deactivate the TNL tunnel transmission of uplink data or release the TNL tunnel;
  • the TNL tunnel transmission update or release request also includes at least one of the following: the source TNL address of the uplink F1 user plane transmitted through the TNL tunnel needs to be deactivated, the source TNL address of the uplink F1 control plane transmitted through the TNL tunnel needs to be deactivated, The source TNL address of the uplink non-F1 data transmitted through the TNL tunnel needs to be deactivated, and the GTP TEID of the uplink F1 user plane transmitted through the TNL tunnel needs to be deactivated.
  • the sending unit 1903 also sends a TNL tunnel transmission update or release response to the host centralized unit, where the TNL tunnel transmission update or release response includes the endpoint TNL address of the TNL tunnel of the second host distribution unit;
  • the TNL tunnel transmission update or release response further includes at least one of the following: the source TNL address of the uplink F1 user plane successfully deactivated through the TNL tunnel, the source TNL address of the uplink F1 control plane successfully deactivated through the TNL tunnel address, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel that was successfully deactivated, and the source TNL address of the failed deactivation.
  • the receiving unit 1901 also receives the service mapping information release indication sent by the host centralization unit, and the service mapping information release indication is used to release and deactivate the BAP routing identifier of the downlink data transmitted through the TNL tunnel and the second host distribution unit The configuration of the return RLC channel between the next-hop child node and the next-hop child node.
  • the IAB node switches from the first host distribution unit to the second host distribution unit, or, after the wireless link between the IAB node and the first host distribution unit fails, the RRC re-establishes to the second host distribution unit, and the first host distribution unit
  • the distribution unit belongs to the first host centralized unit
  • the second hosted distribution unit belongs to the second hosted centralized unit.
  • the receiving unit 1901 also receives the TNL tunnel transmission establishment request sent by the second host centralization unit, and the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit; wherein, the TNL tunnel transmission establishment request It is used to request the second host distribution unit to establish a TNL tunnel or activate the TNL tunnel transmission of uplink data;
  • the TNL tunnel transmission establishment request also includes at least one of the following: the source TNL address of the uplink F1 user plane that needs to be activated through the TNL tunnel, the source TNL address of the uplink F1 control plane that needs to be activated through the TNL tunnel, or the source TNL address that needs to be activated through the TNL tunnel Source TNL address of uplink non-F1 data transmitted through the tunnel.
  • the sending unit 1903 also sends a TNL tunnel transmission establishment response to the second host centralization unit, where the TNL tunnel transmission establishment response includes the endpoint TNL address of the TNL tunnel of the second host distribution unit;
  • the TNL tunnel transmission establishment response also includes at least one of the following: the source TNL address of the uplink F1 user plane successfully activated through the TNL tunnel, the source TNL address of the uplink F1 control plane successfully activated through the TNL tunnel, the activation success The source TNL address of the uplink non-F1 data transmitted through the TNL tunnel, and the source TNL address of the activation failure.
  • the receiving unit 1901 also receives the service mapping information sent by the host centralization unit, and the service mapping information is used to configure the BAP routing identifier of the downlink data transmitted through the TNL tunnel and the link between the second host distribution unit and the next hop child node.
  • the receiving unit 1901 also receives the TNL tunnel transmission update or release request sent by the second host centralization unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit; the TNL tunnel transmission The update or release request is used to request the second master unit to deactivate the TNL tunnel transmission of uplink data or release the TNL tunnel;
  • the TNL tunnel transmission update or release request also includes at least one of the following: the source TNL address of the uplink F1 user plane transmitted through the TNL tunnel needs to be deactivated, the source TNL address of the uplink F1 control plane transmitted through the TNL tunnel needs to be deactivated, The source TNL address of the uplink non-F1 data transmitted through the TNL tunnel needs to be deactivated.
  • the sending unit 1903 also sends a TNL tunnel transmission update or release response to the second host centralization unit, where the TNL tunnel transmission update or release response includes the endpoint TNL address of the TNL tunnel of the second host distribution unit;
  • the TNL tunnel transmission update or release response further includes at least one of the following: the source TNL address of the uplink F1 user plane successfully deactivated through the TNL tunnel, the source TNL address of the uplink F1 control plane successfully deactivated through the TNL tunnel address, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel that was successfully deactivated, and the source TNL address of the failed deactivation.
  • the receiving unit 1901 also receives the service mapping information release indication sent by the host centralization unit, and the service mapping information release indication is used to release and deactivate the BAP routing identifier of the downlink data transmitted through the TNL tunnel and the second host distribution unit The configuration of the return RLC channel between the next-hop child node and the next-hop child node.
  • the IAB node performs multipath distribution across HCUs, the first HDU belongs to the first HCU, and the second HDU belongs to the second HCU.
  • the receiving unit 1901 also receives the TNL tunnel transmission establishment request sent by the second host centralization unit, and the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit; wherein, the TNL tunnel transmission establishment request It is used to request the second host distribution unit to establish a TNL tunnel or activate the TNL tunnel transmission of uplink data;
  • the TNL tunnel transmission establishment request also includes at least one of the following: the source TNL address of the uplink F1 user plane that needs to be activated through the TNL tunnel, the source TNL address of the uplink F1 control plane that needs to be activated through the TNL tunnel, or the source TNL address that needs to be activated through the TNL tunnel.
  • the source TNL address of the uplink non-F1 data transmitted through the tunnel and the GTP TEID of the uplink F1 user plane that needs to be activated through the TNL tunnel.
  • the sending unit 1903 also sends a TNL tunnel transmission establishment response to the second host centralization unit, where the TNL tunnel transmission establishment response includes the endpoint TNL address of the TNL tunnel of the second host distribution unit;
  • the TNL tunnel transmission establishment response also includes at least one of the following: the source TNL address of the uplink F1 user plane successfully activated through the TNL tunnel, the source TNL address of the uplink F1 control plane successfully activated through the TNL tunnel, the activation success The source TNL address of the uplink non-F1 data transmitted through the TNL tunnel, and the source TNL address of the activation failure.
  • the receiving unit 1901 also receives the service mapping information sent by the host centralization unit, and the service mapping information is used to configure the BAP routing identifier of the downlink data transmitted through the TNL tunnel and the link between the second host distribution unit and the next hop child node.
  • the receiving unit 1901 also receives the TNL tunnel transmission update or release request sent by the second host centralization unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit; the TNL tunnel transmission The update or release request is used to request the second master unit to deactivate the TNL tunnel transmission of uplink data or release the TNL tunnel;
  • the TNL tunnel transmission update or release request also includes at least one of the following: the source TNL address of the uplink F1 user plane transmitted through the TNL tunnel needs to be deactivated, the source TNL address of the uplink F1 control plane transmitted through the TNL tunnel needs to be deactivated, The source TNL address of the uplink non-F1 data transmitted through the TNL tunnel needs to be deactivated, and the GTP TEID of the uplink F1 user plane transmitted through the TNL tunnel needs to be deactivated.
  • the sending unit 1903 also sends a TNL tunnel transmission update or release response to the second host centralization unit, where the TNL tunnel transmission update or release response includes the endpoint TNL address of the TNL tunnel of the second host distribution unit;
  • the TNL tunnel transmission update or release response further includes at least one of the following: the source TNL address of the uplink F1 user plane successfully deactivated through the TNL tunnel, the source TNL address of the uplink F1 control plane successfully deactivated through the TNL tunnel address, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel that was successfully deactivated, and the source TNL address of the failed deactivation.
  • the receiving unit 1901 also receives the service mapping information release indication sent by the host centralization unit, and the service mapping information release indication is used to release and deactivate the BAP routing identifier of the downlink data transmitted through the TNL tunnel and the second host distribution unit The configuration of the return RLC channel between the next-hop child node and the next-hop child node.
  • the receiving unit 1901 receives the downlink data sent to the IAB node; the processing unit 1902 adds headers related to the transport network layer tunnel to the downlink data; and the sending unit 1903 sends the downlink data to the second host distribution unit through the transport network layer tunnel data.
  • the header includes at least one of: an Internet Protocol header, a GPRS Tunneling Protocol header, a User Datagram Protocol header, or a Transmission Control Protocol header;
  • the source transport network layer address of the header is the transport network layer address of the first HDU or a TNL address that can be routed through the first HDU
  • the destination transport network layer address of the header is the second HDU The transport network layer address of .
  • the IAB node is switched from the first host distribution unit to the second host distribution unit, or the RRC is re-established to the second host distribution unit after the wireless link between the IAB node and the first host distribution unit fails; wherein, the first A host distribution unit and a second host distribution unit belong to the same host concentration unit.
  • the receiving unit 1901 also receives the TNL tunnel transmission establishment request sent by the host centralization unit, the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; the TNL tunnel transmission establishment request is used to request the second A host distribution unit establishes a TNL tunnel or activates the TNL tunnel transmission of downlink data;
  • the TNL tunnel transmission establishment request also includes at least one of the following: the target TNL address of the downlink F1 user plane that needs to be activated through the TNL tunnel, the target TNL address of the downlink F1 control plane that needs to be activated through the TNL tunnel, or the target TNL address that needs to be activated through the TNL tunnel. Destination TNL address of tunneled downlink non-F1 data.
  • the sending unit 1903 also sends a TNL tunnel transmission establishment response to the host centralized unit, where the TNL tunnel transmission establishment response includes the endpoint TNL address of the TNL tunnel of the first host distribution unit;
  • the TNL tunnel transmission setup response further includes at least one of the following: the target TNL address of the downlink F1 user plane successfully activated through the TNL tunnel, the target TNL address of the downlink F1 control plane successfully activated through the TNL tunnel, and the activation success The target TNL address of the downlink non-F1 data transmitted through the TNL tunnel, and the target TNL address of the activation failure.
  • the receiving unit 1901 also receives the TNL tunnel transmission update or release request sent by the host centralized unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; wherein, the TNL tunnel transmission The update or release request is used to request the first host distribution unit to deactivate the TNL tunnel transmission of downlink data or release the TNL tunnel;
  • the TNL tunnel transmission update or release request also includes at least one of the following: the target TNL address of the downlink F1 user plane transmitted through the TNL tunnel that needs to be deactivated, the target TNL address of the downlink F1 control plane transmitted through the TNL tunnel that needs to be deactivated address, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel that needs to be deactivated.
  • the sending unit 1903 also sends a TNL tunnel transmission update or release response to the host centralized unit, where the TNL tunnel transmission update or release response includes the endpoint TNL address of the TNL tunnel of the first host distribution unit;
  • the TNL tunnel transmission update or release response further includes at least one of the following: the target TNL address of the downlink F1 user plane successfully deactivated through the TNL tunnel, the target TNL address of the downlink F1 control plane successfully deactivated through the TNL tunnel address, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel that is deactivated successfully, and the target TNL address that fails to be deactivated.
  • the IAB node performs multipath distribution within the HCU, and the first HDU and the second HDU belong to the same HCU.
  • the receiving unit 1901 also receives the TNL tunnel transmission establishment request sent by the host centralization unit, the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; the TNL tunnel transmission establishment request is used to request the second A host distribution unit establishes a TNL tunnel or activates the TNL tunnel transmission of downlink data;
  • the TNL tunnel transmission establishment request also includes at least one of the following: the target TNL address of the downlink F1 user plane that needs to be activated through the TNL tunnel, the target TNL address of the downlink F1 control plane that needs to be activated through the TNL tunnel, the TNL pass through The target TNL address of the downlink non-F1 data transmitted by the tunnel, and the GTP TEID of the downlink F1 user plane that needs to be activated through the TNL tunnel.
  • the sending unit 1903 also sends a TNL tunnel transmission establishment response to the host centralized unit, where the TNL tunnel transmission establishment response includes the endpoint TNL address of the TNL tunnel of the first host distribution unit;
  • the TNL tunnel transmission setup response further includes at least one of the following: the target TNL address of the downlink F1 user plane successfully activated through the TNL tunnel, the target TNL address of the downlink F1 control plane successfully activated through the TNL tunnel, and the activation success The target TNL address of the downlink non-F1 data transmitted through the TNL tunnel, and the target TNL address of the activation failure.
  • the receiving unit 1901 also receives the TNL tunnel transmission update or release request sent by the host centralized unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; wherein, the TNL tunnel transmission The update or release request is used to request the first host distribution unit to deactivate the TNL transmission of downlink data or release the TNL tunnel;
  • the TNL tunnel transmission update or release request also includes at least one of the following: the target TNL address of the downlink F1 user plane transmitted through the TNL tunnel needs to be deactivated, the target TNL address of the downlink F1 control plane transmitted through the TNL tunnel needs to be deactivated, The target TNL address of the downlink non-F1 data transmitted through the TNL tunnel needs to be deactivated, and the GTP TEID of the downlink F1 user plane transmitted through the TNL tunnel needs to be deactivated.
  • the sending unit 1903 also sends a TNL tunnel transmission update or release response to the host centralized unit, where the TNL tunnel transmission update or release response includes the endpoint TNL address of the TNL tunnel of the first host distribution unit;
  • the TNL tunnel transmission update or release response further includes at least one of the following: the target TNL address of the downlink F1 user plane successfully deactivated through the TNL tunnel, the target TNL address of the downlink F1 control plane successfully deactivated through the TNL tunnel address, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel that is deactivated successfully, and the target TNL address that fails to be deactivated.
  • the IAB node is switched from the first host distribution unit to the second host distribution unit, or, after the wireless link between the IAB node and the first host distribution unit fails, the RRC is re-established to the second host distribution unit, the first A host distribution unit belongs to the first host centralized unit, and a second host distribution unit belongs to the second host centralized unit.
  • the receiving unit 1901 also receives the TNL tunnel transmission establishment request sent by the first host centralization unit, the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; the TNL tunnel transmission establishment request is used for requesting the first host distribution unit to establish a TNL tunnel or activate the TNL tunnel transmission of downlink data;
  • the TNL tunnel transmission establishment request also includes at least one of the following: the target TNL address of the downlink F1 user plane that needs to be activated through the TNL tunnel, the target TNL address of the downlink F1 control plane that needs to be activated through the TNL tunnel, or the target TNL address that needs to be activated through the TNL tunnel. Destination TNL address of tunneled downlink non-F1 data.
  • the sending unit 1903 also sends a TNL tunnel transmission establishment response to the first host centralization unit, where the TNL tunnel transmission establishment response includes the endpoint TNL address of the TNL tunnel of the first host distribution unit;
  • the TNL tunnel transmission setup response further includes at least one of the following: the target TNL address of the downlink F1 user plane successfully activated through the TNL tunnel, the target TNL address of the downlink F1 control plane successfully activated through the TNL tunnel, and the activation success The target TNL address of the downlink non-F1 data transmitted through the TNL tunnel, and the target TNL address of the activation failure.
  • the receiving unit 1901 also receives the TNL tunnel transmission update or release request sent by the first host centralization unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; wherein, TNL The tunnel transmission establishment request is used to request the first host distribution unit to deactivate the TNL tunnel transmission of downlink data or release the TNL tunnel;
  • the TNL tunnel transmission update or release request also includes at least one of the following: the target TNL address of the downlink F1 user plane transmitted through the TNL tunnel needs to be deactivated, the target TNL address of the downlink F1 control plane transmitted through the TNL tunnel needs to be deactivated, The destination TNL address of the downlink non-F1 data transmitted through the TNL tunnel needs to be deactivated.
  • the sending unit 1903 also sends a TNL tunnel transmission update or release response to the first host centralized unit, where the TNL tunnel transmission update or release response includes the endpoint TNL address of the TNL tunnel of the first host distribution unit;
  • the TNL tunnel transmission update or release response further includes at least one of the following: the target TNL address of the downlink F1 user plane successfully deactivated through the TNL tunnel, the target TNL address of the downlink F1 control plane successfully deactivated through the TNL tunnel address, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel that is deactivated successfully, and the target TNL address that fails to be deactivated.
  • the IAB node performs multipath distribution across HCUs, the first HDU belongs to the first HCU, and the second HDU belongs to the second HCU.
  • the receiving unit 1901 also receives the TNL tunnel transmission establishment request sent by the first host centralization unit, the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; the TNL tunnel transmission establishment request is used for requesting the first host distribution unit to establish a TNL tunnel or activate the TNL tunnel transmission of downlink data;
  • the TNL tunnel transmission establishment request also includes at least one of the following: the target TNL address of the downlink F1 user plane that needs to be activated through the TNL tunnel, the target TNL address of the downlink F1 control plane that needs to be activated through the TNL tunnel, or the target TNL address that needs to be activated through the TNL tunnel.
  • the sending unit 1903 also sends a TNL tunnel transmission establishment response to the first host centralization unit, where the TNL tunnel transmission establishment response includes the endpoint TNL address of the TNL tunnel of the first host distribution unit;
  • the TNL tunnel transmission setup response further includes at least one of the following: the target TNL address of the downlink F1 user plane successfully activated through the TNL tunnel, the target TNL address of the downlink F1 control plane successfully activated through the TNL tunnel, and the activation success The target TNL address of the downlink non-F1 data transmitted through the TNL tunnel, and the target TNL address of the activation failure.
  • the receiving unit 1901 also receives the TNL tunnel transmission update or release request sent by the first host centralization unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; wherein, TNL The tunnel transmission update or release request is used to request the first host distribution unit to deactivate the TNL transmission of downlink data or release the TNL tunnel;
  • the TNL tunnel transmission update or release request also includes at least one of the following: the target TNL address of the downlink F1 user plane transmitted through the TNL tunnel needs to be deactivated, the target TNL address of the downlink F1 control plane transmitted through the TNL tunnel needs to be deactivated, The target TNL address of the downlink non-F1 data transmitted through the TNL tunnel needs to be deactivated, and the GTP TEID of the downlink F1 user plane transmitted through the TNL tunnel needs to be deactivated.
  • the sending unit 1903 also sends a TNL tunnel transmission update or release response to the first host centralized unit, where the TNL tunnel transmission update or release response includes the endpoint TNL address of the TNL tunnel of the first host distribution unit;
  • the TNL tunnel transmission update or release response further includes at least one of the following: the target TNL address of the downlink F1 user plane successfully deactivated through the TNL tunnel, the target TNL address of the downlink F1 control plane successfully deactivated through the TNL tunnel address, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel that is deactivated successfully, and the target TNL address that fails to be deactivated.
  • the IAB communication device 1900 in the embodiment of the present application may further include other components or modules, and for specific content of these components or modules, reference may be made to related technologies.
  • FIG. 19 only exemplarily shows the connection relationship or signal direction between various components or modules, but it should be clear to those skilled in the art that various related technologies such as bus connection can be used.
  • the above-mentioned components or modules may be implemented by hardware facilities such as processors, memories, transmitters, receivers, etc.; the implementation of the present application is not limited thereto.
  • the second donor distribution unit adds tunnel-related headers to the uplink data, and sends uplink data to the first donor distribution unit (original donor-DU) through the TNL tunnel; and/or, the first donor The distribution unit (original donor-DU) adds tunnel-related headers to the downlink data, and sends the downlink data to the second donor distribution unit (target donor-DU) through the TNL tunnel. Therefore, establishing a TNL tunnel between the original donor-DU and the target donor-DU where the IAB-node migrates can solve the problem of discarded uplink data or downlink data.
  • An embodiment of the present application provides a communication system, including a Donor device and an IAB node (IAB-node).
  • IAB-node IAB node
  • the embodiment of the present application also provides a Donor device.
  • Fig. 20 is a schematic diagram of a Donor device according to an embodiment of the present application.
  • a Donor device 2000 may include: a processor (such as a central processing unit CPU) 2001 and a memory 2002 ; the memory 2002 is coupled to the processor 2001 .
  • the memory 2002 can store various data; in addition, a program 2005 for information processing is also stored, and the program 2005 is executed under the control of the central processing unit 2001 .
  • the processor 2001 may be configured to execute a program to implement the IAB communication method in the embodiment of the first aspect.
  • the processor 2001 may be configured to perform the following control: receive the uplink data sent by the IAB node; add a header related to the TNL tunnel to the uplink data; and send the uplink to the first host distribution unit through the transport network layer (TNL) tunnel data.
  • TNL transport network layer
  • the processor 2001 may be configured to execute a program to implement the IAB communication method in the embodiment of the second aspect.
  • the processor 2001 may be configured to perform the following control: receive the downlink data sent to the IAB node; add a TNL tunnel-related header to the downlink data; and send the downlink to the second host distribution unit through the transport network layer (TNL) tunnel data.
  • TNL transport network layer
  • the processor 2001 may be configured to execute a program to implement the IAB communication method in the embodiment of the third aspect.
  • the processor 2001 may be configured to perform the following control: instruct the second host distribution unit to receive the uplink data sent by the IAB node, and transmit the uplink data through the transmission network layer (TNL) between the second host distribution unit and the first host distribution unit. ) tunnel to send uplink data to the first host distribution unit.
  • TNL transmission network layer
  • the processor 2001 may be configured to perform the following control: instruct the first host distribution unit to receive the downlink data sent to the IAB node, and transmit the downlink data through the transmission network layer (TNL) between the first host distribution unit and the second host distribution unit. ) tunnel to send downlink data to the second host distribution unit.
  • TNL transmission network layer
  • the Donor device 2000 may further include: a transceiver 2003 and an antenna 2004 ; wherein, the functions of the above components are similar to those of the prior art, and will not be repeated here. It should be noted that the Donor device 2000 does not necessarily include all the components shown in FIG. 20 ; in addition, the Donor device 2000 may also include components not shown in FIG. 20 , and reference may be made to the prior art.
  • the embodiment of the present application also provides a computer-readable program, wherein when the program is executed in the Donor device, the program causes the computer to execute the IAB communication in the embodiments of the first to third aspects in the Donor device method.
  • the embodiment of the present application also provides a storage medium storing a computer-readable program, wherein the computer-readable program enables the computer to execute the IAB communication methods in the embodiments of the first to third aspects in the Donor device.
  • the above devices and methods in this application can be implemented by hardware, or by combining hardware and software.
  • the present application relates to a computer-readable program that, when executed by a logic component, enables the logic component to realize the above-mentioned device or constituent component, or enables the logic component to realize the above-mentioned various methods or steps.
  • Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like.
  • the present application also relates to storage media for storing the above programs, such as hard disks, magnetic disks, optical disks, DVDs, flash memories, and the like.
  • the method/device described in conjunction with the embodiments of the present application may be directly embodied as hardware, a software module executed by a processor, or a combination of both.
  • one or more of the functional block diagrams shown in the figure and/or one or more combinations of the functional block diagrams may correspond to each software module or each hardware module of the computer program flow.
  • These software modules may respectively correspond to the steps shown in the figure.
  • These hardware modules for example, can be realized by solidifying these software modules by using a Field Programmable Gate Array (FPGA).
  • FPGA Field Programmable Gate Array
  • a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM or any other form of storage medium known in the art.
  • a storage medium can be coupled to the processor such that the processor can read information from, and write information to, the storage medium, or it can be an integral part of the processor.
  • the processor and storage medium can be located in the ASIC.
  • the software module can be stored in the memory of the mobile terminal, or can be stored in a memory card that can be inserted into the mobile terminal.
  • the software module can be stored in the MEGA-SIM card or large-capacity flash memory device.
  • One or more of the functional blocks described in the accompanying drawings and/or one or more combinations of the functional blocks can be implemented as a general-purpose processor, a digital signal processor (DSP) for performing the functions described in this application ), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any suitable combination thereof.
  • DSP digital signal processor
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • One or more of the functional blocks described in the drawings and/or one or more combinations of the functional blocks can also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors processor, one or more microprocessors in communication with a DSP, or any other such configuration.
  • IAB integrated access and backhaul
  • the second host distribution unit receives the uplink data sent by the IAB node
  • the second host distribution unit adds the tunnel-related header to the uplink data
  • the second host distribution unit sends the uplink data to the first host distribution unit through the transport network layer (TNL) tunnel.
  • TNL transport network layer
  • the header includes at least one of the following: Internet Protocol (IP) header, General Packet Radio Service (GPRS) Tunneling Protocol (GTP) header, User Datagram Protocol (UDP) header or Transmission Control Protocol (TCP) header.
  • IP Internet Protocol
  • GPRS General Packet Radio Service
  • GTP General Packet Radio Service
  • UDP User Datagram Protocol
  • TCP Transmission Control Protocol
  • the second host distribution unit receives the TNL tunnel transmission establishment request sent by the host centralization unit, and the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit; wherein, the TNL tunnel The transmission establishment request is used to request the second host distribution unit to establish the TNL tunnel or activate the TNL tunnel transmission of the uplink data.
  • the TNL tunnel transmission establishment request further includes at least one of the following: the source TNL address of the uplink F1 user plane that needs to be activated through the TNL tunnel, and the source TNL address that needs to be activated through the The source TNL address of the uplink F1 control plane transmitted by the TNL tunnel, and the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel needs to be activated.
  • the second host distribution unit sends a TNL tunnel transmission setup response to the host central unit, and the TNL tunnel transmission setup response includes an endpoint TNL address of the TNL tunnel of the second host distribution unit.
  • the TNL tunnel transmission establishment response further includes at least one of the following: the source TNL address of the uplink F1 user plane successfully activated through the TNL tunnel, the The source TNL address of the uplink F1 control plane transmitted by the TNL tunnel, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel successfully activated, and the source TNL address of the failed activation.
  • BAP backhaul adaptation protocol
  • the second host distribution unit receives the TNL tunnel transmission update or release request sent by the host centralization unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit;
  • the TNL tunnel transmission update or release request is used to request the second master unit to deactivate the TNL tunnel transmission of the uplink data or release the TNL tunnel.
  • the second host distribution unit receives the TNL tunnel transmission update or release request sent by the host centralization unit.
  • the TNL tunnel transmission update or release request further includes at least one of the following: the source TNL address of the uplink F1 user plane transmitted through the TNL tunnel needs to be deactivated, Activating the source TNL address of the uplink F1 control plane transmitted through the TNL tunnel needs to deactivate the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel.
  • the second host distribution unit sends a TNL tunnel transmission update or release response to the host central unit, and the TNL tunnel transmission update or release response includes an endpoint TNL address of the TNL tunnel of the second host distribution unit.
  • the TNL tunnel transmission update or release response further includes at least one of the following: deactivate the source TNL address of the uplink F1 user plane successfully transmitted through the TNL tunnel, deactivate The source TNL address of the uplink F1 control plane successfully activated through the TNL tunnel, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel successfully deactivated, and the source TNL address of the failed deactivation.
  • the second host distribution unit further receives the service mapping information release indication sent by the host centralization unit, and the service mapping information release indication is used to release and deactivate the The BAP routing identifier of the downlink data transmitted by the TNL tunnel and the configuration of the return RLC channel between the second host distribution unit and the next-hop child node.
  • the second host distribution unit receives the TNL tunnel transmission establishment request sent by the host centralization unit, and the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit; wherein, the TNL tunnel The transmission establishment request is used to request the second host distribution unit to establish the TNL tunnel or activate the TNL tunnel transmission of the uplink data.
  • the TNL tunnel transmission establishment request further includes at least one of the following: the source TNL address of the uplink F1 user plane that needs to be activated through the TNL tunnel, and the source TNL address that needs to be activated through the The source TNL address of the uplink F1 control plane transmitted by the TNL tunnel, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel needs to be activated, and the GTP tunnel endpoint identifier of the uplink F1 user plane transmitted through the TNL tunnel needs to be activated ( TEID).
  • the second host distribution unit sends a TNL tunnel transmission setup response to the host central unit, and the TNL tunnel transmission setup response includes an endpoint TNL address of the TNL tunnel of the second host distribution unit.
  • the TNL tunnel transmission setup response further includes at least one of the following: the source TNL address of the uplink F1 user plane that is successfully activated through the TNL tunnel, the The source TNL address of the uplink F1 control plane transmitted by the TNL tunnel, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel successfully activated, and the source TNL address of the failed activation.
  • the second host distribution unit further receives service mapping information configured by the host centralization unit, and the service mapping information is used to configure downlink data transmitted through the TNL tunnel.
  • the second host distribution unit receives the TNL tunnel transmission update or release request sent by the host centralization unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit;
  • the TNL tunnel transmission update or release request is used to request the second master unit to deactivate the TNL tunnel transmission of the uplink data or release the TNL tunnel.
  • the TNL tunnel transmission update or release request further includes at least one of the following: the source TNL address of the uplink F1 user plane transmitted through the TNL tunnel needs to be deactivated, Activate the source TNL address of the uplink F1 control plane transmitted through the TNL tunnel, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel needs to be deactivated, and the uplink F1 user plane transmitted through the TNL tunnel needs to be deactivated
  • the GTP TEID the source TNL address of the uplink F1 user plane transmitted through the TNL tunnel needs to be deactivated.
  • the second host distribution unit sends a TNL tunnel transmission update or release response to the host central unit, and the TNL tunnel transmission update or release response includes an endpoint TNL address of the TNL tunnel of the second host distribution unit.
  • the TNL tunnel transmission update or release response further includes at least one of the following: deactivate the source TNL address of the uplink F1 user plane successfully transmitted through the TNL tunnel, deactivate The source TNL address of the uplink F1 control plane successfully activated through the TNL tunnel, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel successfully deactivated, and the source TNL address of the failed deactivation.
  • the second host distribution unit further receives a service mapping information release indication sent by the host centralization unit, and the service mapping information release indication is used to release and deactivate the The BAP routing identifier of the downlink data transmitted by the TNL tunnel and the configuration of the return RLC channel between the second host distribution unit and the next hop child node.
  • the IAB node is switched from the first host distribution unit to the second host distribution unit, or the IAB node is wirelessly connected to the first host distribution unit After a link failure (RLF), the RRC is re-established to the second HDU, the first HDU belongs to the first HCU, and the second HDU belongs to the second HCU.
  • RLF link failure
  • the second host distribution unit receives the TNL tunnel transmission establishment request sent by the second host concentration unit, and the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit; wherein, the The TNL tunnel transmission establishment request is used to request the second host distribution unit to establish the TNL tunnel or activate the TNL tunnel transmission of the uplink data.
  • the TNL tunnel transmission establishment request further includes at least one of the following: the source TNL address of the uplink F1 user plane that needs to be activated through the TNL tunnel, and the source TNL address that needs to be activated through the The source TNL address of the uplink F1 control plane transmitted by the TNL tunnel, and the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel needs to be activated.
  • the second host distribution unit sends a TNL tunnel transmission setup response to the second host centralized unit, and the TNL tunnel transmission setup response includes an endpoint TNL address of the TNL tunnel of the second host distribution unit.
  • the TNL tunnel transmission setup response further includes at least one of the following: the source TNL address of the uplink F1 user plane that is successfully activated through the TNL tunnel, the The source TNL address of the uplink F1 control plane transmitted by the TNL tunnel, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel successfully activated, and the source TNL address of the failed activation.
  • the second host distribution unit receives the TNL tunnel transmission update or release request sent by the second host concentration unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit;
  • the TNL tunnel transmission update or release request is used to request the second master unit to deactivate the TNL tunnel transmission of the uplink data or release the TNL tunnel.
  • the TNL tunnel transmission update or release request further includes at least one of the following: the source TNL address of the uplink F1 user plane transmitted through the TNL tunnel needs to be deactivated, Activating the source TNL address of the uplink F1 control plane transmitted through the TNL tunnel needs to deactivate the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel.
  • the second host distribution unit sends a TNL tunnel transmission update or release response to the second host central unit, and the TNL tunnel transmission update or release response includes an endpoint TNL address of the TNL tunnel of the second host distribution unit.
  • the TNL tunnel transmission update or release response further includes at least one of the following: deactivate the source TNL address of the uplink F1 user plane successfully transmitted through the TNL tunnel, deactivate The source TNL address of the uplink F1 control plane successfully activated through the TNL tunnel, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel successfully deactivated, and the source TNL address of the failed deactivation.
  • the second master distribution unit further receives a service mapping information release indication sent by the master centralization unit, and the service mapping information release indication is used to release and deactivate the The BAP routing identifier of the downlink data transmitted by the TNL tunnel and the configuration of the return RLC channel between the second host distribution unit and the next hop child node.
  • the second host distribution unit receives the TNL tunnel transmission establishment request sent by the second host concentration unit, and the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit; wherein, the The TNL tunnel transmission establishment request is used to request the second host distribution unit to establish the TNL tunnel or activate the TNL tunnel transmission of the uplink data.
  • BAP Backhaul Adaptive Protocol
  • the TNL tunnel transmission establishment request further includes at least one of the following: the source TNL address of the uplink F1 user plane that needs to be activated through the TNL tunnel, needs to be activated through the The source TNL address of the uplink F1 control plane transmitted by the TNL tunnel, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel needs to be activated, and the GTP TEID of the uplink F1 user plane transmitted through the TNL tunnel needs to be activated.
  • the second host distribution unit sends a TNL tunnel transmission setup response to the second host centralized unit, and the TNL tunnel transmission setup response includes an endpoint TNL address of the TNL tunnel of the second host distribution unit.
  • the TNL tunnel transmission setup response further includes at least one of the following: the source TNL address of the uplink F1 user plane that is successfully activated through the TNL tunnel, the The source TNL address of the uplink F1 control plane transmitted by the TNL tunnel, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel successfully activated, and the source TNL address of the failed activation.
  • the second host distribution unit receives the TNL tunnel transmission update or release request sent by the second host concentration unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the first host distribution unit;
  • the TNL tunnel transmission update or release request is used to request the second master unit to deactivate the TNL tunnel transmission of the uplink data or release the TNL tunnel.
  • the TNL tunnel transmission update or release request further includes at least one of the following: the source TNL address of the uplink F1 user plane transmitted through the TNL tunnel needs to be deactivated, Activate the source TNL address of the uplink F1 control plane transmitted through the TNL tunnel, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel needs to be deactivated, and the uplink F1 user plane transmitted through the TNL tunnel needs to be deactivated
  • the GTP TEID the source TNL address of the uplink F1 user plane transmitted through the TNL tunnel needs to be deactivated.
  • the second host distribution unit sends a TNL tunnel transmission update or release response to the second host central unit, and the TNL tunnel transmission update or release response includes an endpoint TNL address of the TNL tunnel of the second host distribution unit.
  • the TNL tunnel transmission update or release response further includes at least one of the following: deactivate the source TNL address of the uplink F1 user plane successfully transmitted through the TNL tunnel, deactivate The source TNL address of the uplink F1 control plane successfully activated through the TNL tunnel, the source TNL address of the uplink non-F1 data transmitted through the TNL tunnel successfully deactivated, and the source TNL address of the failed deactivation.
  • the second host distribution unit further receives a service mapping information release indication sent by the host centralization unit, and the service mapping information release indication is used to release and deactivate the The BAP routing identifier of the downlink data transmitted by the TNL tunnel and the configuration of the return RLC channel between the second host distribution unit and the next hop child node.
  • IAB integrated access and backhaul
  • the first host distribution unit receives the downlink data sent to the IAB node
  • the first host distribution unit adds a header related to the TNL tunnel to the downlink data
  • the first host distribution unit sends the downlink data to the second host distribution unit through the transport network layer (TNL) tunnel.
  • TNL transport network layer
  • the header includes at least one of the following: Internet Protocol (IP) header, General Packet Radio Service (GPRS) Tunneling Protocol (GTP) header, User Datagram Protocol (UDP) header or Transmission Control Protocol (TCP) header.
  • IP Internet Protocol
  • GPRS General Packet Radio Service
  • GTP General Packet Radio Service
  • UDP User Datagram Protocol
  • TCP Transmission Control Protocol
  • the source transport network layer (TNL) address of the header is the transport network layer (TNL) address of the first host distribution unit or can be distributed through the first host
  • the TNL address of the unit route, the target transport network layer (TNL) address of the header is the transport network layer (TNL) address of the second HDN.
  • the IAB node is switched from the first host distribution unit to the second host distribution unit, or the IAB node is wirelessly connected to the first host distribution unit RRC re-establishes to the second Donor Distribution Unit after the link fails; wherein, the first Donor Distribution Unit and the second Donor Distribution Unit belong to the same Donor Centralized Unit (donor-CU).
  • the first host distribution unit receives the TNL tunnel transmission establishment request sent by the host centralization unit, and the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; the TNL tunnel transmission establishment The request is used to request the first host distribution unit to establish the TNL tunnel or activate the TNL tunnel transmission of the downlink data.
  • the first host distribution unit receives the TNL tunnel transmission establishment request sent by the host centralization unit .
  • the TNL tunnel transmission establishment request further includes at least one of the following: the target TNL address of the downlink F1 user plane that needs to be activated through the TNL tunnel, needs to be activated through the The target TNL address of the downlink F1 control plane transmitted by the TNL tunnel, and the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel needs to be activated.
  • the first host distribution unit sends a TNL tunnel transmission setup response to the host central unit, and the TNL tunnel transmission setup response includes an endpoint TNL address of the TNL tunnel of the first host distribution unit.
  • the TNL tunnel transmission establishment response further includes at least one of the following: the target TNL address of the downlink F1 user plane that is successfully activated through the TNL tunnel, the The target TNL address of the downlink F1 control plane transmitted by the TNL tunnel, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel successfully activated, and the target TNL address of the failed activation.
  • the first host distribution unit receives the TNL tunnel transmission update or release request sent by the host centralization unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; wherein, The TNL tunnel transmission update or release request is used to request the first host distribution unit to deactivate the TNL tunnel transmission of the downlink data or release the TNL tunnel.
  • the first host distribution unit receives the TNL tunnel transmission update or release request sent by the host centralization unit.
  • the TNL tunnel transmission update or release request further includes at least one of the following: the target TNL address of the downlink F1 user plane transmitted through the TNL tunnel that needs to be deactivated, the required The deactivated target TNL address of the downlink F1 control plane transmitted through the TNL tunnel, and the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel that needs to be deactivated.
  • the first host distribution unit sends a TNL tunnel transmission update or release response to the host central unit, and the TNL tunnel transmission update or release response includes an endpoint TNL address of the TNL tunnel of the first host distribution unit.
  • the TNL tunnel transmission update or release response further includes at least one of the following: deactivate the target TNL address of the downlink F1 user plane successfully transmitted through the TNL tunnel, deactivate The target TNL address of the downlink F1 control plane successfully activated through the TNL tunnel, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel successfully deactivated, and the target TNL address of the failed deactivation.
  • the IAB node performs multipath distribution within a donor centralized unit (intra-donor CU), and the first donor distribution unit and the second donor distribution unit belong to the same Donor Centralized Unit (donor-CU).
  • the first host distribution unit receives the TNL tunnel transmission establishment request sent by the host centralization unit, and the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; the TNL tunnel transmission establishment The request is used to request the first host distribution unit to establish the TNL tunnel or activate the TNL tunnel transmission of the downlink data.
  • the TNL tunnel transmission establishment request further includes at least one of the following: the target TNL address of the downlink F1 user plane that needs to be activated through the TNL tunnel, the target TNL address that needs to be activated through the The target TNL address of the downlink F1 control plane transmitted by the TNL tunnel, the target TNL address of the downlink non-F1 data transmitted by the TNL through the tunnel needs to be activated, and the GTP TEID of the downlink F1 user plane transmitted through the TNL tunnel needs to be activated.
  • the first host distribution unit sends a TNL tunnel transmission setup response to the host central unit, and the TNL tunnel transmission setup response includes an endpoint TNL address of the TNL tunnel of the first host distribution unit.
  • the TNL tunnel transmission setup response further includes at least one of the following: the target TNL address of the downlink F1 user plane that is successfully activated through the TNL tunnel, the The target TNL address of the downlink F1 control plane transmitted by the TNL tunnel, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel successfully activated, and the target TNL address of the failed activation.
  • the first host distribution unit receives the TNL tunnel transmission update or release request sent by the host centralization unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; wherein, The TNL tunnel transmission update or release request is used to request the first host distribution unit to deactivate the TNL transmission of the downlink data or release the TNL tunnel.
  • the TNL tunnel transmission update or release request further includes at least one of the following: the target TNL address of the downlink F1 user plane transmitted through the TNL tunnel needs to be deactivated, Activate the target TNL address of the downlink F1 control plane transmitted through the TNL tunnel, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel needs to be deactivated, and the downlink F1 user plane transmitted through the TNL tunnel needs to be deactivated
  • the GTP TEID the target TNL address of the downlink F1 user plane transmitted through the TNL tunnel needs to be deactivated.
  • the first host distribution unit sends a TNL tunnel transmission update or release response to the host central unit, and the TNL tunnel transmission update or release response includes an endpoint TNL address of the TNL tunnel of the first host distribution unit.
  • the TNL tunnel transmission update or release response further includes at least one of the following: deactivate the target TNL address of the downlink F1 user plane successfully transmitted through the TNL tunnel, deactivate The target TNL address of the downlink F1 control plane successfully activated through the TNL tunnel, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel successfully deactivated, and the target TNL address of the failed deactivation.
  • the first host distribution unit receives the TNL tunnel transmission establishment request sent by the first host concentration unit, and the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; the TNL tunnel The transmission establishment request is used to request the first host distribution unit to establish the TNL tunnel or activate the TNL tunnel transmission of the downlink data.
  • the first host distribution unit receives the message sent by the first host centralization unit The TNL tunnel transport establishment request.
  • the TNL tunnel transmission establishment request further includes at least one of the following: the target TNL address of the downlink F1 user plane that needs to be activated through the TNL tunnel, needs to be activated through the The target TNL address of the downlink F1 control plane transmitted by the TNL tunnel, and the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel needs to be activated.
  • the first host distribution unit sends a TNL tunnel transmission setup response to the first host centralized unit, and the TNL tunnel transmission setup response includes an endpoint TNL address of the TNL tunnel of the first host distribution unit.
  • the TNL tunnel transmission establishment response further includes at least one of the following: the target TNL address of the downlink F1 user plane successfully activated through the TNL tunnel, the The target TNL address of the downlink F1 control plane transmitted by the TNL tunnel, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel successfully activated, and the target TNL address of the failed activation.
  • the first host distribution unit receives the TNL tunnel transmission update or release request sent by the first host concentration unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; Wherein, the TNL tunnel transmission establishment request is used to request the first host distribution unit to deactivate the TNL tunnel transmission of the downlink data or release the TNL tunnel.
  • the TNL tunnel transmission update or release request further includes at least one of the following: the target TNL address of the downlink F1 user plane transmitted through the TNL tunnel needs to be deactivated, Activating the target TNL address of the downlink F1 control plane transmitted through the TNL tunnel needs to deactivate the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel.
  • the first host distribution unit sends a TNL tunnel transmission update or release response to the first host central unit, and the TNL tunnel transmission update or release response includes an endpoint TNL address of the TNL tunnel of the first host distribution unit.
  • the TNL tunnel transmission update or release response further includes at least one of the following: deactivate the target TNL address of the downlink F1 user plane successfully transmitted through the TNL tunnel, deactivate The target TNL address of the downlink F1 control plane successfully activated through the TNL tunnel, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel successfully deactivated, and the target TNL address of the failed deactivation.
  • the IAB node performs multipath distribution across a centralized donor unit (inter-donor CU), the first donor distribution unit belongs to the first centralized donor unit, and the second The two-host distribution unit belongs to the second-host concentration unit.
  • the first host distribution unit receives the TNL tunnel transmission establishment request sent by the first host concentration unit, and the TNL tunnel transmission establishment request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; the TNL tunnel The transmission establishment request is used to request the first host distribution unit to establish the TNL tunnel or activate the TNL tunnel transmission of the downlink data.
  • the first host distribution unit receives the TNL tunnel transmission establishment request sent by the first host centralization unit .
  • BAP Backhaul Adaptive Protocol
  • the TNL tunnel transmission establishment request further includes at least one of the following: the target TNL address of the downlink F1 user plane that needs to be activated through the TNL tunnel, needs to be activated through the The target TNL address of the downlink F1 control plane transmitted by the TNL tunnel, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel needs to be activated, and the GTP TEID of the downlink F1 user plane transmitted through the TNL tunnel needs to be activated.
  • the first host distribution unit sends a TNL tunnel transmission setup response to the first host centralized unit, and the TNL tunnel transmission setup response includes an endpoint TNL address of the TNL tunnel of the first host distribution unit.
  • the TNL tunnel transmission setup response further includes at least one of the following: the target TNL address of the downlink F1 user plane that is successfully activated through the TNL tunnel, the The target TNL address of the downlink F1 control plane transmitted by the TNL tunnel, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel successfully activated, and the target TNL address of the failed activation.
  • the first host distribution unit receives the TNL tunnel transmission update or release request sent by the first host concentration unit, and the TNL tunnel transmission update or release request includes the endpoint TNL address of the TNL tunnel of the second host distribution unit; Wherein, the TNL tunnel transmission update or release request is used to request the first host distribution unit to deactivate the TNL transmission of the downlink data or release the TNL tunnel.
  • the TNL tunnel transmission update or release request further includes at least one of the following: the target TNL address of the downlink F1 user plane transmitted through the TNL tunnel needs to be deactivated, Activate the target TNL address of the downlink F1 control plane transmitted through the TNL tunnel, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel needs to be deactivated, and the downlink F1 user plane transmitted through the TNL tunnel needs to be deactivated
  • the GTP TEID the target TNL address of the downlink F1 user plane transmitted through the TNL tunnel needs to be deactivated.
  • the first host distribution unit sends a TNL tunnel transmission update or release response to the first host central unit, and the TNL tunnel transmission update or release response includes an endpoint TNL address of the TNL tunnel of the first host distribution unit.
  • the TNL tunnel transmission update or release response further includes at least one of the following: deactivate the target TNL address of the downlink F1 user plane successfully transmitted through the TNL tunnel, deactivate The target TNL address of the downlink F1 control plane successfully activated through the TNL tunnel, the target TNL address of the downlink non-F1 data transmitted through the TNL tunnel successfully deactivated, and the target TNL address of the failed deactivation.
  • IAB integrated access and backhaul
  • the second host centralization unit instructs the second host distribution unit to receive the uplink data sent by the IAB node, and pass the transmission network layer (TNL) between the second host distribution unit and the first host distribution unit sending the uplink data to the first host distribution unit through a tunnel;
  • TNL transmission network layer
  • the first host distribution unit belongs to the first host concentration unit
  • the second host distribution unit belongs to the second host concentration unit
  • the second host concentration unit sends a TNL tunnel transmission establishment request to the second host distribution unit, and the TNL tunnel transmission establishment request includes the TNL tunnel endpoint TNL address of the first host distribution unit; wherein, the TNL tunnel The transmission establishment request is used to request the second host distribution unit to establish the TNL tunnel or activate the TNL tunnel transmission of the uplink data.
  • the second host centralization unit After the second host centralization unit receives the RRC re-establishment completion message of the IAB node,
  • the second host centralization unit does not configure the TNL address assigned by the second host distribution unit for the IAB node.
  • the second host centralization unit also receives the TNL address assigned by the first host distribution unit for the IAB node sent by the first host centralization unit, so that the second host centralization unit sends
  • the distribution unit sends a TNL tunnel transmission establishment request.
  • IAB integrated access and backhaul
  • the first host centralization unit instructs the first host distribution unit to receive the downlink data sent to the IAB node, and pass the transmission network layer (TNL) between the first host distribution unit and the second host distribution unit sending the downlink data to the second host distribution unit through a tunnel;
  • TNL transmission network layer
  • the first host distribution unit belongs to the first host concentration unit
  • the second host distribution unit belongs to the second host concentration unit
  • the first host concentration unit also sends a TNL tunnel transmission update or release request to the first host distribution unit, and the TNL tunnel transmission update or release request includes the TNL tunnel endpoint TNL address of the second host distribution unit; wherein The TNL tunnel transmission update or release request is used to request the first host distribution unit to deactivate the TNL tunnel transmission of the downlink data or release the TNL tunnel.
  • the first host centralization unit sends The first host distribution unit sends the TNL tunnel transmission update or release request.
  • the second host centralization unit further sends the TNL address assigned by the second host distribution unit to the IAB node to the first host centralization unit to trigger
  • the first host centralization unit sends the TNL tunnel transmission update or release request to the first host distribution unit.
  • IAB integrated access and backhaul
  • the host centralization unit instructs the second host distribution unit to receive the uplink data sent by the IAB node, and transmits the uplink data through the transport network layer (TNL) tunnel between the second host distribution unit and the first host distribution unit to The first host distribution unit sends the uplink data;
  • TNL transport network layer
  • the first host distribution unit and the second host distribution unit belong to the host concentration unit.
  • IAB integrated access and backhaul
  • the host centralization unit instructs the first host distribution unit to receive the downlink data sent to the IAB node, and transmits the downlink data through the transport network layer (TNL) tunnel between the first host distribution unit and the second host distribution unit to The second host distribution unit sends the downlink data;
  • TNL transport network layer
  • the first host distribution unit and the second host distribution unit belong to the host concentration unit.
  • a host (Donor) device comprising a memory and a processor, the memory stores a computer program, wherein the processor is configured to execute the computer program to achieve any one of Supplements 1 to 114 The IAB communication method described above.
  • a communication system comprising a Donor device and an IAB node (IAB-node); wherein, the Donor device is configured to execute the IAB communication method described in any one of Supplements 1 to 114.

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Abstract

本申请实施例提供了一种集成的接入和回传(IAB)的通信装置和方法。所述方法包括：第二宿主分布单元(目标donor-DU)为上行数据添加隧道相关的报头，以及通过TNL隧道向第一宿主分布单元(原donor-DU)发送上行数据；和/或，第一宿主分布单元(原donor-DU)为下行数据添加隧道相关的报头，以及通过TNL隧道向第二宿主分布单元(目标donor-DU)发送下行数据。

Description

集成的接入和回传的通信装置以及方法 技术领域
本申请实施例涉及通信领域。
背景技术
未来无缝的蜂窝网络部署需要非常灵活和超密集的NR小区部署，超密集网络是5G的目标之一，部署一个无需有线回传的新无线(NR，new radio)网络对于实现5G的超密集网络非常重要。由于5G毫米波使小区覆盖范围缩小，无线自回传系统需要多跳才能满足部署需求。5G的高带宽、大规模多输入多输出(MIMO)和波束系统使5G比LTE更容易开发超密集NR小区的无线自回传系统，为了开发这种带有无线自回传的多跳系统，3GPP在R16开始了集成的接入和回传(IAB，Integrated access and backhaul)项目的研究和标准化。
图1是IAB系统的一示意图，如图1所示，在IAB系统中，中继节点同时支持接入(access)和回传(backhaul)功能，中继节点的无线传输链路在时域、频域或空域上复用接入链路(access link)和回传链路(backhaul link)，接入链路和回传链路可以使用相同或不同的频段。
在IAB网络架构如下，中继节点指的是IAB-node(IAB节点)，其同时支持接入和回传功能。网络侧最后一跳接入节点称为IAB-donnor(IAB宿主)，其支持gNB功能并支持IAB-node接入。所有的UE数据可以通过一跳或多跳经IAB-node回传到IAB-Donor。
IAB-node的功能分为两部分，一部分是gNB-DU功能，称作IAB-DU(分布单元)，另一部分是UE功能，称作IAB-MT(移动终端)。IAB-DU实现网络侧设备功能，连接到下游的child IAB-node(子IAB节点)，对UE以及下游child IAB-node提供NR空口接入并与IAB Donor-CU之间建立有F1连接。IAB-MT实现部分终端设备功能，连接到上游的parent IAB-node(父IAB节点)或IAB-Donor DU，IAB-MT包括物理层、层二、RRC(Radio Resource Control，无线资源控制)和NAS(Non-Access Stratum，非接入层)层功能，还间接的连接到IAB Donor-CU以及核心网(Core Network，CN)。
在IAB系统中，IAB-node可以通过独立组网(SA，Standalone)模式或非独立 组网(EN-DC，E-UTRA-NRDualConnectivity)模式接入网络。图2是SA模式的IAB架构的示意图。图3是EN-DC模式的IAB架构的示意图。
图4是一个IAB节点(IAB-node)与父节点(parent IAB-node)和子节点(child IAB-node)的示意图。如图4所示，IAB节点的IAB-DU作为网络侧与子节点的IAB-MT连接，IAB节点的IAB-MT作为终端侧与父节点的IAB-DU连接。
图5是IAB-DU和IAB-Donor CU之间的F1用户面(F1-U)协议栈的示意图。图6是IAB-DU和IAB-Donor CU之间的F1控制面(F1-C)协议栈的示意图。如图5和图6所示，F1-U和F1-C是建立在IAB-DU和IAB-Donor-CU之间的传输(IP)层之上，图5和图6中经过两跳无线回传和一跳有线回传。
在回传链路上，传输(IP)层承载在回传自适应协议(BAP)子层上，IAB-node中的BAP实体实现IAB系统的路由功能，由IAB-Donor CU提供路由表。BAP PDU(协议数据单元)在回传链路的RLC(无线链路控制)信道中传输，回传链路的多个RLC信道可以被IAB-Donor配置为承载不同的优先级和QoS(服务质量)的业务，由BAP实体将BAP PDU映射到不同的回传RLC信道上。
如果IAB网络的一个IAB-node断开与原来的父IAB-node的连接，连接到新的父IAB-node，或者，当IAB-node保持与原父节点的连接并增加与一个新父节的连接，变成双连接时，会导致IAB网络拓扑的改变。
图7是网络拓扑改变的示意图。如图7所示，IAB-node5从IAB-node3下的小区切换到IAB-node 4下的小区之后，IAB-node5及其下游子节点IAB-node 6到Donor-CU的F1传输路径由经过IAB-node1和IAB-node 2变为经过IAB-node2和IAB-node 4，则网络拓扑发生了改变。或者，IAB-node5增加到IAB-node 4的连接，变成双连接之后，IAB-node5及其下游子节点IAB-node 6到Donor-CU的F1传输路径增加了一条经过IAB-node1和IAB-node 2的路径，则网络拓扑发生改变。
应该注意，上面对技术背景的介绍只是为了方便对本申请的技术方案进行清楚、完整的说明，并方便本领域技术人员的理解而阐述的，不能仅仅因为这些方案在本申请的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。
发明内容
发明人发现，网络拓扑发生改变后的某些情况下，IAB-node及其子节点可能不会被配置可通过目标Donor-DU(target Donor-DU)路由的传输网络层(TNL， Transmission Network Layer)地址。上行数据可能会被目标Donor-DU丢弃，而下行数据可能会被原Donor-DU(source Donor-DU)丢弃。
为了解决上述问题的至少之一，本申请实施例提供一种IAB通信装置以及方法。
根据本申请实施例的一方面，提供一种IAB通信方法，包括：
第二宿主分布单元接收由IAB节点发送的上行数据；
为所述上行数据添加传输网络层(TNL)隧道相关的报头；以及
通过所述传输网络层隧道向第一宿主分布单元发送所述上行数据。
根据本申请实施例的另一方面，提供一种IAB通信装置，包括：
接收部，其接收由IAB节点发送的上行数据；
处理部，其为所述上行数据添加传输网络层(TNL)隧道相关的报头；以及
发送部，其通过所述传输网络层隧道向第一宿主分布单元发送所述上行数据。
根据本申请实施例的另一方面，提供一种IAB通信方法，包括：
第一宿主分布单元接收向IAB节点发送的下行数据；
为所述下行数据添加传输网络层(TNL)隧道相关的报头；以及
通过所述传输网络层隧道向第二宿主分布单元发送所述下行数据。
根据本申请实施例的另一方面，提供一种IAB通信装置，包括：
接收部，其接收向IAB节点发送的下行数据；
处理部，其为所述下行数据添加传输网络层(TNL)隧道相关的报头；以及
发送部，其通过所述传输网络层隧道向第二宿主分布单元发送所述下行数据。
本申请实施例的有益效果之一在于：第二宿主分布单元(目标donor-DU)为上行数据添加隧道相关的报头，以及通过TNL隧道向第一宿主分布单元(原donor-DU)发送上行数据；和/或，第一宿主分布单元(原donor-DU)为下行数据添加隧道相关的报头，以及通过TNL隧道向第二宿主分布单元(目标donor-DU)发送下行数据。由此，在IAB-node迁移的原donor-DU和目标donor-DU之间建立TNL隧道，能够解决上行数据或下行数据被丢弃的问题。
参照后文的说明和附图，详细公开了本申请的特定实施方式，指明了本申请的原理可以被采用的方式。应该理解，本申请的实施方式在范围上并不因而受到限制。在所附附记的精神和条款的范围内，本申请的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用，与其它实施方式中的特征相组合，或替代其它实施方式中的 特征。
应该强调，术语“包括/包含”在本文使用时指特征、整件、步骤或组件的存在，但并不排除一个或更多个其它特征、整件、步骤或组件的存在或附加。
附图说明
在本申请实施例的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。此外，在附图中，类似的标号表示几个附图中对应的部件，并可用于指示多于一种实施方式中使用的对应部件。
所包括的附图用来提供对本申请实施例的进一步的理解，其构成了说明书的一部分，用于例示本申请的实施方式，并与文字描述一起来阐释本申请的原理。显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。在附图中：
图1是IAB系统的一示意图；
图2是SA模式的IAB架构的一示意图；
图3是EN-DC模式的IAB架构的一示意图；
图4是父节点(parent IAB-node)和子节点(child IAB-node)的一示意图；
图5是IAB系统的F1-U协议栈的一示意图；
图6是IAB系统的F1-C协议栈的一示意图；
图7是网络拓扑改变的一示意图；
图8是CU内拓扑适应过程的一示意图；
图9是本申请实施例的IAB通信方法的一示意图；
图10是本申请实施例的激活TNL隧道的一示例图；
图11是本申请实施例的去激活TNL隧道的一示例图；
图12是本申请实施例的激活TNL隧道的另一示例图；
图13是本申请实施例的去激活TNL隧道的另一示例图；
图14是本申请实施例的激活TNL隧道的另一示例图；
图15是本申请实施例的去激活TNL隧道的另一示例图；
图16是本申请实施例的激活TNL隧道的另一示例图；
图17是本申请实施例的去激活TNL隧道的另一示例图；
图18是本申请实施例的IAB通信方法的一示意图；
图19是本申请实施例的IAB通信装置的一示意图；
图20是本申请实施例的Donor设备的一示意图。
具体实施方式
参照附图，通过下面的说明书，本申请的前述以及其它特征将变得明显。在说明书和附图中，具体公开了本申请的特定实施方式，其表明了其中可以采用本申请的原则的部分实施方式，应了解的是，本申请不限于所描述的实施方式，相反，本申请包括落入所附附记的范围内的全部修改、变型以及等同物。
在本申请实施例中，术语“第一”、“第二”等用于对不同元素从称谓上进行区分，但并不表示这些元素的空间排列或时间顺序等，这些元素不应被这些术语所限制。术语“和/或”包括相关联列出的术语的一种或多个中的任何一个和所有组合。术语“包含”、“包括”、“具有”等是指所陈述的特征、元素、元件或组件的存在，但并不排除存在或添加一个或多个其他特征、元素、元件或组件。
在本申请实施例中，单数形式“一”、“该”等包括复数形式，应广义地理解为“一种”或“一类”而并不是限定为“一个”的含义；此外术语“所述”应理解为既包括单数形式也包括复数形式，除非上下文另外明确指出。此外术语“根据”应理解为“至少部分根据……”，术语“基于”应理解为“至少部分基于……”，除非上下文另外明确指出。
在本申请实施例中，术语“通信网络”或“无线通信网络”可以指符合如下任意通信标准的网络，例如新无线(NR，New Radio)、长期演进(LTE，Long Term Evolution)、增强的长期演进(LTE-A，LTE-Advanced)、宽带码分多址接入(WCDMA，Wideband Code Division Multiple Access)、高速报文接入(HSPA，High-Speed Packet Access)等等。
并且，通信系统中设备之间的通信可以根据任意阶段的通信协议进行，例如可以包括但不限于如下通信协议：1G(generation)、2G、2.5G、2.75G、3G、4G、4.5G以及未来的5G、6G等等，和/或其他目前已知或未来将被开发的通信协议。
在本申请实施例中，术语“网络设备”例如是指通信系统中将终端设备接入通信网络并为该终端设备提供服务的设备。网络设备可以包括但不限于如下设备：基站(BS，Base Station)、接入点(AP、Access Point)、发送接收点(TRP，Transmission Reception Point)、广播发射机、移动管理实体(MME、Mobile Management Entity)、 网关、服务器、无线网络控制器(RNC，Radio Network Controller)、基站控制器(BSC，Base Station Controller)等等。
其中，基站可以包括但不限于：节点B(NodeB或NB)、演进节点B(eNodeB或eNB)以及5G基站(gNB)，等等，此外还可包括远端无线头(RRH，Remote Radio Head)、远端无线单元(RRU，Remote Radio Unit)、中继(relay)或者低功率节点(例如femto、pico等等)。并且术语“基站”可以包括它们的一些或所有功能，每个基站可以对特定的地理区域提供通信覆盖。术语“小区”可以指的是基站和/或其覆盖区域，这取决于使用该术语的上下文。
在本申请实施例中，术语“用户设备”(UE，User Equipment)例如是指通过网络设备接入通信网络并接收网络服务的设备，也可以称为“终端设备”(TE，Terminal Equipment)。终端设备可以是固定的或移动的，并且也可以称为移动台(MS，Mobile Station)、终端、用户、用户台(SS，Subscriber Station)、接入终端(AT，Access Terminal)、站，等等。
其中，终端设备可以包括但不限于如下设备：蜂窝电话(Cellular Phone)、个人数字助理(PDA，Personal Digital Assistant)、无线调制解调器、无线通信设备、手持设备、机器型通信设备、膝上型计算机、无绳电话、智能手机、智能手表、数字相机，等等。
再例如，在物联网(IoT，Internet of Things)等场景下，终端设备还可以是进行监控或测量的机器或装置，例如可以包括但不限于：机器类通信(MTC，Machine Type Communication)终端、车载通信终端、设备到设备(D2D，Device to Device)终端、机器到机器(M2M，Machine to Machine)终端，等等。
Rel-16 NR已经对IAB-node在同一个donor-CU下移动时网络拓扑的更新(topology adaptation)过程进行了标准化。IAB-node改变父节点时，Donor-CU通过RRC重配置消息为IAB-node配置网络拓扑更新相关的配置，使IAB-node进行F1传输路径的迁移。
网络拓扑更新相关的配置包括对IAB-node的BAP地址的更新，对上行F1-C、F1-U和非F1数据的回传RLC信道(BH RLC channel)、BAP路由标识(Donor-DU的BAP地址和路径标识)的更新，如果迁移后目标Donor-DU与原donor-DU不同，还需要对可通过Donor-DU路由的源TNL地址进行更新，该TNL地址由目标Donor-DU分配。
IAB-node接入到新的父节点时开始应用上述网络拓扑更新相关的配置，即IaB-node开始使用新的BAP地址，IAB-node的上行F1传输和非F1传输开始使用配置的BAP路由标识和源TNL地址。对于IAB-node的下游子节点，也通过相同的方法进行网络拓扑更新相关的配置。
图8是CU内(intra-CU)拓扑适应过程的示意图。示出了目前已标准化的intra-CU topology adaptation，其中包括对迁移IAB-node的IAB-MT的切换以及IAB-DU与donor-CU之间F1连接的迁移过程。
在图8中，为简单起见省略了部分实体，例如源路径可以包括source parent IAB-node、intermediate hop IAB-node on source path和source IAB-donor-DU中的至少一个，目标路径可以包括target parent IAB-node、intermediate hop IAB-node on target path和target IAB-donor-DU中的至少一个。图8仅对于IAB节点执行Intra-CU topology adaptation进行了示意性说明，本申请不限于此，具体内容还可以参考相关技术。
在现有的拓扑冗余(topology redundancy)过程中，IAB-node及其子节点可能不会被配置可通过目标Donor-DU路由的TNL地址，在IAB-node接入新的父节点后，上行数据的源TNL地址仍然采用可通过原Donor-DU路由的TNL地址，即原Donor-DU分配的TNL地址。
如果IAB-node迁移后的目标Donor-DU与原Donor-DU不同，即进行intra-donor CU topology redundancy或者inter-donor CU toplogy redundancy时，这些源TNL地址为原Donor-DU分配的TNL地址的上行数据将通过迁移后的路径传到目标donor-DU，因为这些数据携带的不是目标Donor-DU分配的TNL地址，会被目标Donor-DU的源TNL地址过滤功能丢弃。
相应地，下行数据的目标TNL地址仍然采用可由原Donor-DU路由的TNL地址，即原Donor-DU分配的TNL地址。如果IAB-node迁移后的目标Donor-DU与原Donor-DU不同，这些目的TNL地址为原Donor-DU分配的TNL地址的下行数据不可路由到目标Donor-DU，因此会被原Donor-DU丢弃。
另外，即使IAB-node及其子节点被配置了可通过目标Donor-DU路由的TNL地址，迁移IAB-node接入新的父节点时，IAB-node及其各子节点中可能还有一些源TNL地址采用可由原Donor-DU路由的TNL地址的上行数据(UL data inflight)，即源TNL地址为原Donor-DU分配的TNL地址的上行数据。如果IAB-node迁移后的目标Donor-DU与原Donor-DU不同，这些源TNL地址为原Donor-DU分配的TNL地址的 上行数据会被目标Donor-DU的源TNL地址过滤功能丢弃。
相应地，迁移IAB-node接入新的父节点时，原Donor-DU中可能还有一些目标TNL地址为迁移之前可通过原Donor-DU路由的TNL地址的下行数据(DL data inflight)，即目标TNL地址为原Donor-DU分配的TNL地址的下行数据。如果IAB-node迁移后的目标Donor-DU与原Donor-DU不同，这些目标TNL地址为原Donor-DU分配的TNL地址的下行数据会被原Donor-DU丢弃。
针对以上问题或相似问题，本申请实施例在donor-DU之间提供TNL隧道，以下进行详细说明。在本申请实施例中，在没有特别说明的情况下，IAB节点包括迁移IAB节点或其子节点。
第一方面的实施例
本申请实施例提供一种IAB通信方法，从第二宿主分布单元对上行数据的传输进行说明。其中，IAB节点从第一宿主分布单元(source donor-DU)迁移到第二宿主分布单元(target donor-DU)，并且第一宿主分布单元和第二宿主分布单元之间建立传输网络层(TNL)隧道。
图9是本申请实施例的IAB通信方法的一示意图。如图9所示，所述方法包括：
901，第二宿主分布单元接收由IAB节点发送的上行数据；
902，第二宿主分布单元为所述上行数据添加TNL隧道相关的报头；以及
903，第二宿主分布单元通过所述TNL隧道向第一宿主分布单元发送上行数据。
值得注意的是，以上附图9仅对本申请实施例进行了示意性说明，但本申请不限于此。例如可以适当地调整各个操作之间的执行顺序，此外还可以增加其他的一些操作或者减少其中的某些操作。本领域的技术人员可以根据上述内容进行适当地变型，而不仅限于上述附图9的记载。
在一些实施例中，所述报头(Header，也称为头部)包括如下至少之一：互联网协议(IP)报头、通用无线分组业务(GPRS)隧道协议(GTP)报头、用户数据报协议(UDP)报头或传输控制协议(TCP)报头。
在一些实施例中，所述报头的源传输网络层(TNL)地址为所述第二宿主分布单元的TNL地址或者能够通过所述第二宿主分布单元路由的TNL地址，所述报头的目标TNL地址为所述第一宿主分布单元的TNL地址。
例如，源TNL地址为可通过原Donor-DU路由的TNL地址的上行数据由目标 donor-DU添加IP头部，或者还添加GTP/UDP或TCP头部，添加的IP头部以及GTP/UDP或TCP头部中的源TNL地址为目标donor-DU的TNL地址或可通过目标Donor-DU路由的TNL地址，目标TNL地址为原donor-DU侧隧道端点的TNL地址(即原donor-DU的TNL地址)。
由此，在IAB-node迁移的原donor-DU和目标donor-DU之间建立TNL隧道。使得IAB-node进行跨宿主分布单元迁移时，源TNL地址为可通过原Donor-DU路由的TNL地址的上行数据由目标donor-DU通过该TNL隧道传输到原donor-DU，再由原donor-DU路由到donor-CU，能够解决这些上行数据被目标donor-DU丢弃的问题。
以下通过不同场景下的上行数据的传输，进一步对本申请实施例进行说明。
先对于intra-donor CU迁移的场景(例如称为场景1)的上行数据传输进行说明。
在一些实施例中，迁移IAB节点从第一宿主分布单元切换到第二宿主分布单元，或者，迁移的IAB节点到第一宿主分布单元的无线链路失败(RLF)后无线资源控制(RRC)重建立到第二宿主分布单元；其中，第一宿主分布单元和第二宿主分布单元属于同一宿主集中单元(donor-CU)。
换言之，IAB-node进行intra-donor CU迁移(intra-donor CU migration)时，原donor-DU和目标donor-DU之间进行TNL隧道传输。例如，当迁移IAB-node切换到新的父节点时，所有数据的传输路径从IAB-node的原父节点转移到新的父节点，donor-DU由原donor-DU变成目标donor-DU，无论迁移IAB-node和子节点是否被配置了由目标donor-DU分配的TNL地址，均会发生上下行数据丢弃，需要目标donor-DU和原Donor-DU之间进行TNL隧道传输。
在一些实施例中，第二宿主分布单元接收宿主集中单元发送的TNL隧道传输建立请求，TNL隧道传输建立请求包括第一宿主分布单元的TNL隧道的端点TNL地址；其中，TNL隧道传输建立请求用于请求第二宿主分布单元建立TNL隧道或激活上行数据的TNL隧道传输。
例如，在宿主集中单元接收到迁移IAB节点的切换完成消息后，或者，在宿主集中单元接收到迁移IAB节点的RRC重建立完成消息后，或者，宿主集中单元没有为迁移IAB节点或其子节点配置由第二宿主分布单元分配的TNL地址时，第二宿主分布单元接收由宿主集中单元发送的TNL隧道传输建立请求。
在一些实施例中，所述TNL隧道传输建立请求还包括如下至少之一：需要激活通过所述TNL隧道传输的上行F1用户面的源TNL地址、需要激活通过所述TNL隧 道传输的上行F1控制面的源TNL地址、需要激活通过所述TNL隧道传输的上行非F1数据的源TNL地址。
例如，donor-CU向目标donor-DU发送TNL隧道传输建立请求。该TNL隧道传输建立请求包含原donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输建立请求可能还包含需上行F1用户面的源TNL地址、需上行F1控制面的源TNL地址、上行非F1数据的源TNL地址。这里F1包括迁移IAB-node及其子节点的F1连接。
在一些实施例中，第二宿主分布单元向宿主集中单元发送TNL隧道传输建立响应，TNL隧道传输建立响应包括第二宿主分布单元的TNL隧道的端点TNL地址。
在一些实施例中，所述TNL隧道传输建立响应还包括如下至少之一：激活成功的通过TNL隧道传输的上行F1用户面的源TNL地址、激活成功的通过TNL隧道传输的上行F1控制面的源TNL地址、激活成功的通过TNL隧道传输的上行非F1数据的源TNL地址、激活失败的源TNL地址。
例如，目标donor-DU向donor-CU发送TNL隧道传输建立响应。该TNL隧道传输建立响应包含目标donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输建立响应可能还包含成功激活的通过隧道传输的上行F1用户面的源TNL地址、上行F1控制面的源TNL地址、上行非F1数据的源TNL地址、激活失败的源TNL地址。
图10是本申请实施例的激活TNL隧道的一示例图。如图10所示，目标donor-DU的TNL隧道传输建立之后，目标donor-DU将TNL隧道传输建立请求中配置的上行数据(源TNL地址为原Donor-DU分配的TNL地址)通过TNL隧道发送到原donor-DU，然后可以被原donor-DU路由到donor-CU。
在一些实施例中，第二宿主分布单元还接收宿主集中单元发送的业务映射信息，业务映射信息用于配置通过TNL隧道传输的下行数据的回传自适应协议(BAP)路由标识以及所述第二宿主分布单元和下一跳子节点之间的回传RLC信道。
例如，对于目标donor-DU，donor-CU还配置对于已激活通过TNL隧道传输的下行数据的业务映射信息。该业务映射信息包括下行数据的TNL地址和DSCP(Differentiated Services Code Point，差分服务代码点)对应的BAP目的地址和路径标识、下行数据的TNL地址和DSCP映射到目标donor-DU与下一跳IAB-node之间的回传RLC信道的标识，以便于目标Donor-DU将这些TNL隧道传输的下行数据发 送到迁移IaB-node或其子节点。
当donor-CU给IAB-node配置了由目标donor-DU分配的TNL地址(即可通过目标donor-DU路由的TNL地址)之后，携带目标donor-DU分配的TNL地址的上行数据不会被目标donor-DU丢弃，即不需要通过TNL隧道传输即可成功发送到donor-CU，donor-CU可以对相关的上行数据触发更新或释放TNL隧道传输。该IAB-node包括迁移IAB-node或其子节点。
在一些实施例中，第二宿主分布单元接收所述宿主集中单元发送的TNL隧道传输更新或释放请求，TNL隧道传输更新或释放请求包括第一宿主分布单元的TNL隧道的端点TNL地址；TNL隧道传输更新或释放请求用于请求第二宿主单元去激活上行数据的TNL隧道传输或者释放所述TNL隧道。
在一些实施例中，在所述宿主集中单元为IAB节点配置由第二宿主分布单元分配的TNL地址后，或者，在迁移IAB节点完成切换的预设时间之后，或者，在迁移IAB节点完成重建立的预设时间之后，第二宿主分布单元接收由宿主集中单元发送的所述TNL隧道传输更新或释放请求。
例如，如果在迁移IAB-node切换过程中，donor-CU给迁移IAB-node配置了可通过目标donor-DU路由的针对F1-C和非F1数据的TNL地址，当完成切换的预设时间之后，donor-CU去激活对迁移IAB-node的F1-C和非F1数据的TNL隧道传输。
再例如，在完成切换之后，donor-CU又通过RRC重配置消息给迁移IAB-node配置可通过目标donor-DU路由的针对F1-U数据的TNL地址，当RRC重配置完成的预设时间之后，donor-CU去激活对迁移IAB-node的F1-U的TNL隧道传输。
为了使上行的inflight数据分别通过TNL隧道的传输成功路由到donor-CU，当donor-CU给IAB-node配置了由目标donor-DU分配的TNL地址的预设时间之后，再触发更新或释放TNL隧道传输。
在一些实施例中，TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过TNL隧道传输的上行F1用户面的源TNL地址、需要去激活通过TNL隧道传输的上行F1控制面的源TNL地址、需要去激活通过TNL隧道传输的上行非F1数据的源TNL地址。
例如，donor-CU向目标donor-DU发送TNL隧道传输更新或释放请求；该TNL隧道传输更新或释放请求包含原donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输更新或释放请求可能还包含需要去激活通过隧道传输的上行F1用户 面的源TNL地址、需要去激活通过隧道传输的上行F1控制面的源TNL地址、需要去激活通过隧道传输的上行非F1数据的源TNL地址。这里F1包括迁移IAB-node及其子节点的F1连接。
在一些实施例中，第二宿主分布单元向宿主集中单元发送TNL隧道传输更新或释放响应，TNL隧道传输更新或释放响应包括第二宿主分布单元的TNL隧道的端点TNL地址。
在一些实施例中，TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过TNL隧道传输的上行F1用户面的源TNL地址、去激活成功的通过TNL隧道传输的上行F1控制面的源TNL地址、去激活成功的通过TNL隧道传输的上行非F1数据的源TNL地址、去激活失败的源TNL地址。
例如，目标donor-DU向donor-CU发送TNL隧道传输更新或释放响应；该TNL隧道传输更新或释放响应包含目标donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输更新或释放响应可能还包含成功去激活的通过隧道传输的上行F1用户面的源TNL地址、成功去激活的通过隧道传输的上行F1控制面的源TNL地址、成功去激活的通过隧道传输的上行非F1数据的源TNL地址、去激活失败的源TNL地址。
图11是本申请实施例的去激活TNL隧道的一示例图。如图11所示，目标donor-DU的TNL隧道传输更新或释放之后，目标donor-DU不会将TNL隧道传输更新或释放请求中配置的从TNL隧道传输移除的上行数据(源TNL地址为原Donor-DU分配的TNL地址)通过TNL隧道发送到原donor-DU，而是直接丢弃。
在一些实施例中，第二宿主分布单元还接收宿主集中单元发送的业务映射信息释放指示，该业务映射信息释放指示用于释放去激活通过TNL隧道传输的下行数据的BAP路由标识以及第二宿主分布单元和下一跳子节点之间的回传RLC信道的配置。
例如，当被配置了由目标donor-DU分配的TNL地址后，IAB-node还可以通过F1连接控制面信令(F1AP)向donor-CU发送已应用的上下行数据的TNL地址。例如，可以向donor-CU发送分别针对F1用户面、F1控制面以及非F1数据的已应用的由目标donor-DU分配的TNL地址，以及这些数据之前使用的TNL地址(原donor-DU分配的TNL地址)。以便donor-CU触发请求目标donor-DU、原donor-DU将这些数据从TNL隧道传输中移除。
另外，目标donor-DU中，donor-CU还需要对已配置了由目标donor-DU分配的 TNL地址的下行数据进行业务映射信息的重配置，包括配置下行数据的新的TNL地址和DSCP对应的BAP目的地址和路径标识、下行数据的TNL地址和DSCP映射到目标donor-DU与下一跳IAB-node之间的回传RLC信道的标识。而且，donor-CU还要移除之前的业务映射信息。
再对intra-donor CU的双连接场景(可称为场景2)的上行数据传输进行说明。
在一些实施例中，所述IAB节点进行宿主集中单元内(intra-donor CU)的多路径分发，所述第一宿主分布单元和所述第二宿主分布单元属于同一宿主集中单元(donor-CU)。
换言之，IAB-node进行intra-donor CU的多路径分发(intra-donor CU topology redundancy)时，原donor-DU和目标donor-DU之间进行TNL隧道传输。例如，当迁移IAB-node接入到新的父节点时，一部分数据的传输路径从IAB-node的原父节点转移到新的父节点，donor-DU由原donor-DU变成目标donor-DU；而另一部分数据的传输路径仍然经由原父节点、原donor-DU传输。对于传输路径被迁移到目标donor-DU的数据，如果没有被配置由目标donor-DU分配的TNL地址，会发生上下行数据丢弃，需要目标donor-DU和原Donor-DU之间进行TNL隧道传输。
在一些实施例中，第二宿主分布单元接收宿主集中单元发送的TNL隧道传输建立请求，该TNL隧道传输建立请求包括第一宿主分布单元的TNL隧道的端点TNL地址；其中，TNL隧道传输建立请求用于请求第二宿主分布单元建立TNL隧道或者激活上行数据的TNL隧道传输。
在一些实施例中，在宿主集中单元将IAB节点的回传自适应协议(BAP)路由配置为所述第二宿主分布单元的BAP路由标识，但并没有配置由第二宿主分布单元分配的TNL地址的情况下，第二宿主分布单元接收由宿主集中单元发送的所述TNL隧道传输建立请求。上述IAB节点包括迁移IAB节点或其子节点。
例如，当donor-CU将IAB节点的上行F1控制面和non-F1数据的BAP路由配置为目标donor-DU的BAP地址和路径标识时，或者，当donor-CU为IAB-node配置可由目标donor-DU路由的BAP地址以及将IAB-node的下行F1控制面和non-F1数据由目标donor-DU路由至IAB-node，但并没有为IAB节点配置目标donor-DU分配的TNL地址时，donor-CU触发建立TNL隧道传输。
在一些实施例中，上述TNL隧道传输建立请求还包括如下至少之一：需要激活通过所述TNL隧道传输的上行F1用户面的源TNL地址、需要激活通过TNL隧道传 输的上行F1控制面的源TNL地址、需要激活通过TNL隧道传输的上行非F1数据的源TNL地址、需要激活通过TNL隧道传输的上行F1用户面的GTP隧道端点标识(TEID，Tunnel Endpoint Identifier)。
例如，donor-CU向目标donor-DU发送TNL隧道传输建立请求；该TNL隧道传输建立请求包含原donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输建立请求可能还包含需要通过隧道传输的上行F1用户面的源TNL地址、需要通过隧道传输的上行F1控制面的源TNL地址、需要通过隧道传输的上行非F1数据的源TNL地址。
这里F1包括迁移IAB-node及其子节点的F1连接。值得注意的是，因为上行F1用户面路径分发的最小粒度是UE承载，不同的UE承载使用不同的GTP-U隧道，请求上行F1用户面的TNL隧道传输时，除了指示源TNL地址还需要指示UL GTP TEID。
在一些实施例中，第二宿主分布单元向宿主集中单元发送TNL隧道传输建立响应，TNL隧道传输建立响应包括第二宿主分布单元的TNL隧道的端点TNL地址。
在一些实施例中，所述TNL隧道传输建立响应还包括如下至少之一：激活成功的通过TNL隧道传输的上行F1用户面的源TNL地址、激活成功的通过TNL隧道传输的上行F1控制面的源TNL地址、激活成功的通过TNL隧道传输的上行非F1数据的源TNL地址、激活失败的源TNL地址。
例如，目标donor-DU向donor-CU发送TNL隧道传输建立响应；该TNL隧道传输建立响应包含目标donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输建立响应可能还包含成功激活的通过隧道传输的上行F1用户面源TNL地址、成功激活的通过隧道传输的上行F1控制面源TNL地址、成功激活的通过隧道传输的上行非F1数据的源TNL地址、激活失败的源TNL地址。
图12是本申请实施例的激活TNL隧道的一示例图。如图12所示，目标donor-DU的TNL隧道传输建立之后，目标donor-DU将TNL隧道传输建立请求中配置的上行数据(源TNL地址为原Donor-DU分配的TNL地址)通过TNL隧道发送到原donor-DU，然后可以被原donor-DU路由到donor-CU。
在一些实施例中，第二宿主分布单元还接收宿主集中单元配置的业务映射信息，业务映射信息用于配置通过TNL隧道传输的下行数据的BAP路由标识以及第二宿主分布单元和下一跳子节点之间的回传RLC信道。
例如，对于目标donor-DU，donor-CU还配置对于TNL隧道传输建立请求中配置 的目的TNL地址为原Donor-DU分配的TNL地址的下行数据的业务映射信息，包括下行数据的TNL地址和DSCP对应的BAP目的地址和路径标识、下行数据的TNL地址和DSCP映射到目标donor-DU与下一跳IAB-node之间的回传RLC信道的标识，以便于目标Donor-DU将这些TNL隧道传输的下行数据发送到迁移IAB-node或其子节点。
在一些实施例中，第二宿主分布单元接收宿主集中单元发送的TNL隧道传输更新或释放请求，TNL隧道传输更新或释放请求包括第一宿主分布单元的TNL隧道的端点TNL地址；TNL隧道传输更新或释放请求用于请求第二宿主单元去激活上行数据的TNL隧道传输或者释放TNL隧道。
在一些实施例中，在宿主集中单元为IAB节点的配置由第二宿主分布单元分配的TNL地址后，第二宿主分布单元接收由宿主集中单元发送的TNL隧道传输更新或释放请求。
例如，当为IAB节点迁移到目标donor-CU侧的数据配置了由目标donor-DU分配的TNL地址(即可由目标donor-DU路由的TNL地址)之后，携带目标donor-DU分配的TNL地址的上下行数据不需要通过TNL传输即可成功发送到donor-CU或IAB-node，donor-CU可以对相关的上下行数据触发更新或释放TNL隧道传输。
再例如，如果迁移IAB-node连接到新的父节点，与新父节点建立双连接后，其F1控制面数据和非F1数据迁移到目标donor-DU，当donor-CU为迁移IAB-node的F1控制面和非F1数据配置了由目标donor-DU分配的TNL地址时，donor-CU去激活对迁移IAB-node的F1-C和非F1数据的TNL隧道传输。
在一些实施例中，TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过TNL隧道传输的上行F1用户面的源TNL地址、需要去激活通过TNL隧道传输的上行F1控制面的源TNL地址、需要去激活通过TNL隧道传输的上行非F1数据的源TNL地址、需要去激活通过TNL隧道传输的上行F1用户面的GTP TEID。
例如，donor-CU向目标donor-DU发送TNL隧道传输更新或释放请求；该TNL隧道传输更新或释放请求包含原donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输更新或释放请求可能还包含需要去激活通过隧道传输的上行F1用户面的源TNL地址、需要去激活通过隧道传输的上行F1控制面的源TNL地址、需要去激活通过隧道传输的上行非F1数据的源TNL地址。这里F1包括迁移IAB-node及其子节点的F1连接。
在一些实施例中，第二宿主分布单元向宿主集中单元发送TNL隧道传输更新或释放响应，TNL隧道传输更新或释放响应包括第二宿主分布单元的TNL隧道的端点TNL地址。
在一些实施例中，TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过TNL隧道传输的上行F1用户面的源TNL地址、去激活成功的通过TNL隧道传输的上行F1控制面的源TNL地址、去激活成功的通过TNL隧道传输的上行非F1数据的源TNL地址、去激活失败的源TNL地址。
例如，目标donor-DU向donor-CU发送TNL隧道传输更新或释放响应；该TNL隧道传输更新或释放响应包含目标donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输更新或释放响应可能还包含成功去激活的通过隧道传输的上行F1用户面源TNL地址、成功去激活的通过隧道传输的上行F1控制面源TNL地址、成功去激活的通过隧道传输的上行非F1数据的源TNL地址、去激活失败的源TNL地址。
图13是本申请实施例的去激活TNL隧道的一示例图。如图13所示，目标donor-DU的TNL隧道传输更新或释放之后，目标donor-DU不会将从TNL隧道传输移除的上行数据通过TNL隧道发送到原donor-DU，而是直接丢弃。
在一些实施例中，第二宿主分布单元还接收由宿主集中单元发送的业务映射信息释放指示，该业务映射信息释放指示用于释放去激活通过所述TNL隧道传输的下行数据的BAP路由标识以及所述第二宿主分布单元和下一跳子节点之间的回传RLC信道的配置。
例如，当被配置了由目标donor-DU分配的TNL地址后，IAB节点还可以通过F1连接控制面信令(F1AP)向donor-CU发送已应用的上下行数据的TNL地址。例如，可以向donor-CU发送分别针对F1用户面、F1控制面以及非F1数据的已应用的由目标donor-DU分配的TNL地址，以及这些数据之前使用的TNL地址(原donor-DU分配的TNL地址)。以便donor-CU触发请求目标donor-DU、原donor-DU将这些数据从TNL隧道传输中移除。
另外，目标donor-DU中，donor-CU还对已配置了由目标donor-DU分配的TNL地址的下行数据进行业务映射信息的重配置，包括配置下行数据的新的TNL地址和DSCP对应的BAP目的地址和路径标识、下行数据的TNL地址和DSCP映射到目标donor-DU与下一跳IAB-node之间的回传RLC信道的标识。而且，donor-CU还移除 这些下行数据之前(即通过TNL隧道传输时)的业务映射信息。
再对于inter-donor CU迁移的场景(例如称为场景3)的上行数据传输进行说明。
在一些实施例中，IAB节点从第一宿主分布单元切换到第二宿主分布单元，或者，IAB节点到所述第一宿主分布单元无线链路失败(RLF)后RRC重建立到第二宿主分布单元，第一宿主分布单元属于第一宿主集中单元，第二宿主分布单元属于第二宿主集中单元。
换言之，IAB-node进行inter-donor CU迁移(inter-donor-CU migration)时，原donor-DU和目标donor-DU之间进行TNL隧道传输。其中，原donor-DU由原donor-CU控制，目标donor-DU由目标donor-CU控制。
例如，当迁移IAB-node切换到目标donor-CU时，所有数据的传输路径从IAB-node的原donor-CU侧迁移到目标donor-CU侧，donor-DU由原donor-DU变成目标donor-DU，无论迁移IAB-node和子节点是否被配置了由目标donor-DU分配的TNL地址，均会发生上下行数据丢弃，需要目标donor-DU和原Donor-DU之间进行TNL隧道传输。
在一些实施例中，第二宿主分布单元接收第二宿主集中单元发送的TNL隧道传输建立请求，TNL隧道传输建立请求包括第一宿主分布单元的TNL隧道的端点TNL地址；其中，TNL隧道传输建立请求用于请求第二宿主分布单元建立TNL隧道或激活上行数据的TNL隧道传输。
在一些实施例中，在第二宿主集中单元接收到IAB节点的切换完成消息后，或者，在第二宿主集中单元接收到IAB节点的RRC重建立完成消息后，或者，在第二宿主集中单元没有为IAB节点配置由第二宿主分布单元分配的TNL地址时，第二宿主分布单元接收由第二宿主集中单元发送的TNL隧道传输建立请求。
例如，原donor-CU向目标donor-CU发送的针对迁移IAB-node的Handover Request消息包含原donor-DU侧的TNL隧道的端点TNL地址、由原donor-DU分配的迁移IAB-node的F1用户面、F1控制面和非F1数据使用的TNL地址，或者，还包括由原donor-DU分配的迁移IAB-node子节点的F1用户面、F1控制面和非F1数据使用的TNL地址。目标donor-CU向原donor-CU发送的针对迁移IAB-node的Handover Response消息包含目标donor-DU侧的TNL隧道的端点TNL地址。
在一些实施例中，TNL隧道传输建立请求还包括如下至少之一：需要激活通过TNL隧道传输的上行F1用户面的源TNL地址、需要激活通过TNL隧道传输的上行 F1控制面的源TNL地址、需要激活通过TNL隧道传输的上行非F1数据的源TNL地址。
例如，目标donor-CU收到迁移IAB-node发的切换完成消息，向目标donor-DU发送TNL隧道传输建立请求。该TNL隧道传输建立请求包含原donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输建立请求可能还包含上行F1用户面的源TNL地址、上行F1控制面的源TNL地址、上行非F1数据的源TNL地址。这里F1包括迁移IAB-node及其子节点的F1连接。
在一些实施例中，第二宿主分布单元向第二宿主集中单元发送TNL隧道传输建立响应，所述TNL隧道传输建立响应包括所述第二宿主分布单元的TNL隧道的端点TNL地址。
在一些实施例中，TNL隧道传输建立响应还包括如下至少之一：激活成功的通过TNL隧道传输的上行F1用户面的源TNL地址、激活成功的通过TNL隧道传输的上行F1控制面的源TNL地址、激活成功的通过TNL隧道传输的上行非F1数据的源TNL地址、激活失败的源TNL地址。
例如，目标donor-DU向目标donor-CU发送TNL隧道传输建立响应。该TNL隧道传输建立响应包含目标donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输建立响应可能还包含成功激活的通过隧道传输的上行F1用户面的源TNL地址、成功激活的通过隧道传输的上行F1控制面的源TNL地址、成功激活的通过隧道传输的上行非F1数据的源TNL地址、激活失败的源TNL地址。
图14是本申请实施例的激活TNL隧道的一示例图。如图14所示，目标donor-DU的TNL隧道传输建立之后，目标donor-DU将TNL隧道传输建立请求中配置的上行数据(源TNL地址为原Donor-DU分配的TNL地址)通过TNL隧道发送到原donor-DU，然后可以被原donor-DU路由到donor-CU。
在一些实施例中，第二宿主分布单元还接收宿主集中单元发送的业务映射信息，该业务映射信息用于配置通过TNL隧道传输的下行数据的BAP路由标识以及所述第二宿主分布单元和下一跳子节点之间的回传RLC信道。
例如，对于目标donor-DU，目标donor-CU需要配置对于TNL隧道传输建立请求中配置的目的TNL地址为原Donor-DU分配的TNL地址的下行数据的业务映射信息，包括下行数据的TNL地址和DSCP对应的BAP目的地址和路径标识、下行数据的TNL地址和DSCP映射到目标donor-DU与下一跳IAB-node之间的回传RLC信道 的标识，以便于目标Donor-DU将这些TNL隧道传输的下行数据发送到迁移IaB-node或其子节点。因此，原donor-CU还需将迁移IAB-node或其子节点的下行业务的DSCP发送给目标donor-CU，例如，通过Handover Request消息。
当目标donor-CU给IAB-node配置了由目标donor-DU分配的TNL地址(即可通过目标donor-DU路由的TNL地址)之后，携带目标donor-DU分配的TNL地址的上下行数据不需要通过TNL传输即可成功发送到原donor-CU或IAB-node，目标donor-CU可以对相关的上行数据触发更新或释放TNL隧道传输，原donor-CU可以对相关的下行数据触发更新或释放TNL隧道传输。
在一些实施例中，第二宿主分布单元接收第二宿主集中单元发送的TNL隧道传输更新或释放请求，TNL隧道传输更新或释放请求包括第一宿主分布单元的TNL隧道的端点TNL地址；TNL隧道传输更新或释放请求用于请求第二宿主单元去激活上行数据的TNL隧道传输或者释放TNL隧道。
在一些实施例中，在第二宿主集中单元为迁移IAB节点或其子节点配置由第二宿主分布单元分配的TNL地址后，或者，在迁移IAB节点完成切换的预设时间之后，或者，在迁移IAB节点完成重建立的预设时间之后，第二宿主分布单元接收由第二宿主集中单元发送的TNL隧道传输更新或释放请求。
例如，如果迁移IAB-node切换过程中目标donor-CU给迁移IAB-node配置了可通过目标donor-DU路由的针对F1-C和非F1数据的TNL地址，当完成切换的预设时间之后，目标donor-CU和原donor-CU去激活对迁移IAB-node的F1-C和非F1数据的TNL隧道传输。
再例如，在完成切换之后，目标donor-CU又通过RRC重配置消息给迁移IAB-node配置可通过目标donor-DU路由的针对F1-U数据的TNL地址，当RRC重配置完成的预设时间后，目标donor-CU和原donor-CU去激活对迁移IAB-node的F1-U的TNL隧道传输。
为了使上行的infight数据通过TNL隧道的传输成功路由到原donor-CU，当目标donor-CU给IAB-node配置了由目标donor-DU分配的TNL地址的预设时间之后，再触发更新或释放TNL隧道传输。
在一些实施例中，TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过TNL隧道传输的上行F1用户面的源TNL地址、需要去激活通过TNL隧道传输的上行F1控制面的源TNL地址、需要去激活通过TNL隧道传输的上行非F1 数据的源TNL地址。
例如，目标donor-CU向目标donor-DU发送TNL隧道传输更新或释放请求。该TNL隧道传输更新或释放请求包含原donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输更新或释放请求可能还包含需要去激活通过TNL隧道传输的上行F1用户面的源TNL地址、需要去激活通过TNL隧道传输的上行F1控制面的源TNL地址、需要去激活通过TNL隧道传输的上行非F1数据的源TNL地址。这里F1包括迁移IAB-node及其子节点的F1连接。
在一些实施例中，第二宿主分布单元向第二宿主集中单元发送TNL隧道传输更新或释放响应，TNL隧道传输更新或释放响应包括第二宿主分布单元的TNL隧道的端点TNL地址。
在一些实施例中，TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过TNL隧道传输的上行F1用户面的源TNL地址、去激活成功的通过TNL隧道传输的上行F1控制面的源TNL地址、去激活成功的通过TNL隧道传输的上行非F1数据的源TNL地址、去激活失败的源TNL地址。
例如，目标donor-DU向目标donor-CU发送TNL隧道传输更新或释放响应。该TNL隧道传输更新或释放响应包含目标donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输更新或释放响应可能还包含成功去激活的通过隧道传输的上行F1用户面的源TNL地址、成功去激活的通过隧道传输的上行F1控制面的源TNL地址、成功去激活的通过隧道传输的上行非F1数据的源TNL地址、去激活失败的源TNL地址。
图15是本申请实施例的去激活TNL隧道的一示例图。如图15所示，目标donor-DU的TNL隧道传输更新或释放之后，目标donor-DU不会将去激活通过TNL隧道传输的上行数据(源TNL地址为原Donor-DU分配的TNL地址)通过TNL隧道发送到原donor-DU，而是直接丢弃。
在一些实施例中，第二宿主分布单元还接收由宿主集中单元发送的业务映射信息释放指示，业务映射信息释放指示用于释放去激活通过TNL隧道传输的下行数据的BAP路由标识以及所述第二宿主分布单元和下一跳子节点之间的回传RLC信道的配置。
例如，当被配置了由目标donor-DU分配的TNL地址后，IAB-node还可以通过F1连接控制面信令(F1AP)向原donor-CU发送已应用的上下行数据的TNL地址， 例如，可以向原donor-CU发送分别针对F1用户面、F1控制面以及非F1数据的已应用的由目标donor-DU分配的TNL地址，以及这些数据之前使用的TNL地址(原donor-DU分配的TNL地址)。以便原donor-CU和目标donor-DU分别触发请求原donor-DU、目标donor-DU将这些数据从TNL隧道传输中移除。
另外，目标donor-DU中，目标donor-CU还需要对已配置了由目标donor-DU分配的TNL地址的下行数据进行业务映射信息的重配置，包括配置下行数据的新的TNL地址和DSCP对应的BAP目的地址和路径标识、下行数据的新TNL地址和DSCP映射到目标donor-DU与下一跳IAB-node之间的回传RLC信道的标识。而且，donor-CU还要移除这些下行数据之前的业务映射信息。
再对inter-donor CU双连接的场景(例如称为场景4)的上行数据传输进行说明。
在一些实施例中，所述IAB节点进行跨宿主集中单元(inter-donor CU)的多路径分发，所述第一宿主分布单元属于第一宿主集中单元，所述第二宿主分布单元属于第二宿主集中单元。
换言之，迁移IAB-node进行inter-donor CU的多路径分发(inter-donor-CU topology redundancy)时，原donor-DU和目标donor-DU之间进行TNL隧道传输。例如，当迁移IAB-node接入到目标donor-CU时，一部分数据的传输路径从IAB-node的原donor-CU侧迁移到目标donor-CU侧，donor-DU由原donor-DU变成目标donor-DU，而另一部分数据的传输路径仍然经由原父节点、原donor-DU传输。对于传输路径被迁移到目标donor-DU的数据，如果没有被配置由目标donor-DU分配的TNL地址，会发生上下行数据丢弃，需要目标donor-DU和原Donor-DU之间进行TNL隧道传输。
在一些实施例中，第二宿主分布单元接收第二宿主集中单元发送的TNL隧道传输建立请求，该TNL隧道传输建立请求包括第一宿主分布单元的TNL隧道的端点TNL地址；其中，TNL隧道传输建立请求用于请求第二宿主分布单元建立TNL隧道或者激活上行数据的TNL隧道传输。
在一些实施例中，在第二宿主集中单元将IAB节点的回传自适应协议(BAP)路由配置为第二宿主分布单元的BAP路由标识，但并没有配置由第二宿主分布单元分配的TNL地址的情况下，第二宿主分布单元接收由第二宿主集中单元发送的TNL隧道传输建立请求。
例如，原donor-CU向目标donor-CU发送原donor-DU侧的TNL隧道的端点TNL地址、请求迁移到目标donor-CU侧的迁移IAB-node或子节点的上行F1用户面、F1 控制面或非F1数据，以及由原donor-DU分配给这些数据的TNL地址。
例如，通过针对迁移IAB-node的SgNB node addition request消息或SgNB node modification request。目标donor-CU向原donor-CU发送目标donor-DU侧的TNL隧道的端点TNL地址，例如通过针对迁移IAB-node的SgNB node addition response消息或SgNB node modification response消息。
当IAB-node数据的传输路径转移到目标donor-CU侧时，也即当目标donor-CU将IAB-node的上行F1控制面和non-F1数据的BAP路由配置为目标donor-DU的BAP地址和路径标识时，但并没有为上行F1控制数据和非F1数据配置目标donor-DU分配的TNL地址，目标donor-CU、原donor-CU触发建立TNL隧道传输。
在一些实施例中，所述TNL隧道传输建立请求还包括如下至少之一：需要激活通过TNL隧道传输的上行F1用户面的源TNL地址、需要激活通过TNL隧道传输的上行F1控制面的源TNL地址、需要激活通过TNL隧道传输的上行非F1数据的源TNL地址、需要激活通过TNL隧道传输的上行F1用户面的GTP TEID。
例如，目标donor-CU向目标donor-DU发送TNL隧道传输建立请求。该TNL隧道传输建立请求包含原donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输建立请求可能还包含上行F1用户面的源TNL地址、上行F1控制面的源TNL地址、上行非F1数据的源TNL地址。
这里F1包括迁移IAB-node及其子节点的F1连接。值得注意的是，因为上行F1用户面路径分发的最小粒度是UE承载，请求上行F1用户面隧道传输时，除了源TNL地址还需要指示UL GTP TEID。
在一些实施例中，第二宿主分布单元向所述第二宿主集中单元发送TNL隧道传输建立响应，所述TNL隧道传输建立响应包括所述第二宿主分布单元的TNL隧道的端点TNL地址。
在一些实施例中，所述TNL隧道传输建立响应还包括如下至少之一：激活成功的通过所述TNL隧道传输的上行F1用户面的源TNL地址、激活成功的通过所述TNL隧道传输的上行F1控制面的源TNL地址、激活成功的通过所述TNL隧道传输的上行非F1数据的源TNL地址、激活失败的源TNL地址。
例如，目标donor-DU向目标donor-CU发送TNL隧道传输建立响应。该TNL隧道传输建立响应包含目标donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输建立响应可能还包含成功激活的通过隧道传输的上行F1用户面的源TNL地 址、成功激活的通过隧道传输的上行F1控制面的源TNL地址、成功激活的通过隧道传输的上行非F1数据的源TNL地址、激活失败的源TNL地址。
图16是本申请实施例的激活TNL隧道的一示例图。如图16所示，目标donor-DU的TNL隧道传输建立之后，目标donor-DU将TNL隧道传输建立请求中配置的上行数据(源TNL地址为原Donor-DU分配的TNL地址)通过TNL隧道发送到原donor-DU，然后可以被原donor-DU路由到donor-CU。
在一些实施例中，第二宿主分布单元还接收宿主集中单元发送的业务映射信息，业务映射信息用于配置通过TNL隧道传输的下行数据的BAP路由标识以及第二宿主分布单元和下一跳子节点之间的回传RLC信道。
例如，对于目标donor-DU，目标donor-CU还配置对于激活通过TNL隧道传输的下行数据的业务映射信息，包括下行数据的TNL地址和DSCP对应的BAP目的地址和路径标识、下行数据的TNL地址和DSCP映射到目标donor-DU与下一跳IAB-node之间的回传RLC信道的标识，以便于目标Donor-DU将这些TNL隧道传输的下行数据发送到迁移IaB-node或其子节点。因此，原donor-CU还将请求迁移到目标donor-CU侧的下行业务的DSCP发送给目标donor-CU，例如，通过SgNB node addition response消息或SgNB node modification response消息。
在一些实施例中，第二宿主分布单元接收第二宿主集中单元发送的TNL隧道传输更新或释放请求，TNL隧道传输更新或释放请求包括第一宿主分布单元的TNL隧道的端点TNL地址；TNL隧道传输更新或释放请求用于请求第二宿主单元去激活上行数据的TNL隧道传输或者释放TNL隧道。
例如，当目标donor-CU给IAB-node配置了由目标donor-DU分配的TNL地址(即可通过目标donor-DU路由的TNL地址)之后，携带目标donor-DU分配的TNL地址的上下行数据不需要通过TNL传输即可成功发送到原donor-CU或IAB-node，目标donor-CU可以对相关的上行数据触发更新或释放TNL隧道传输，原donor-CU可以对相关的下行数据触发更新或释放TNL隧道传输。
在一些实施例中，在第二宿主集中单元为所述IAB节点配置由第二宿主分布单元分配的TNL地址后，第二宿主分布单元接收由所述第二宿主集中单元发送的TNL隧道传输更新或释放请求。
例如，如果迁移IAB-node连接到新的父节点，与新父节点建立双连接后，F1控制面数据和非F1数据迁移到目标donor-DU。当目标donor-CU为迁移IAB-node的 F1控制面和非F1数据配置了由目标donor-DU分配的TNL地址时，目标donor-CU、原donor-CU去激活对迁移IAB-node的F1-C和非F1数据的TNL隧道传输。
在一些实施例中，所述TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过TNL隧道传输的上行F1用户面的源TNL地址、需要去激活通过TNL隧道传输的上行F1控制面的源TNL地址、需要去激活通过TNL隧道传输的上行非F1数据的源TNL地址、需要去激活通过TNL隧道传输的上行F1用户面的GTP TEID。
例如，目标donor-CU向目标donor-DU发送TNL隧道传输更新或释放请求。该TNL隧道传输更新或释放请求包含原donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输更新或释放请求可能还包含需要去激活通过隧道传输的上行F1用户面的源TNL地址、需要去激活通过隧道传输的上行F1控制面的源TNL地址、需要去激活通过隧道传输的上行非F1数据的源TNL地址。
这里F1包括迁移IAB-node及其子节点的F1连接。值得注意的是，因为上行F1用户面路径分发的最小粒度是UE承载，请求将上行F1用户面移除隧道传输时，除了源TNL地址还需要指示UL GTP TEID。
在一些实施例中，第二宿主分布单元向第二宿主集中单元发送TNL隧道传输更新或释放响应，该TNL隧道传输更新或释放响应包括第二宿主分布单元的TNL隧道的端点TNL地址。
在一些实施例中，TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过TNL隧道传输的上行F1用户面的源TNL地址、去激活成功的通过TNL隧道传输的上行F1控制面的源TNL地址、去激活成功的通过TNL隧道传输的上行非F1数据的源TNL地址、去激活失败的源TNL地址。
例如，目标donor-DU向目标donor-CU发送TNL隧道传输更新或释放响应。该TNL隧道传输更新或释放响应包含目标donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输更新或释放响应可能还包含成功去激活的通过隧道传输的上行F1用户面的源TNL地址、成功去激活的通过隧道传输的上行F1控制面的源TNL地址、成功去激活的通过隧道传输的上行非F1数据的源TNL地址、去激活失败的源TNL地址。
图17是本申请实施例的去激活TNL隧道的一示例图。如图17所示，目标donor-DU的TNL隧道传输更新或释放之后，目标donor-DU不会将去激活通过TNL隧道传输的上行数据(源TNL地址为原Donor-DU分配的TNL地址)通过TNL隧 道发送到原donor-DU，而是直接丢弃。
在一些实施例中，第二宿主分布单元还接收由宿主集中单元发送的业务映射信息释放指示，该业务映射信息释放指示用于释放去激活通过TNL隧道传输的下行数据的BAP路由标识以及第二宿主分布单元和下一跳子节点之间的回传RLC信道的配置。
例如，当被配置了由目标donor-DU分配的TNL地址后，IAB-node还可以通过F1连接控制面信令(F1AP)向原donor-CU发送已应用的上下行数据的TNL地址。例如，可以向原donor-CU发送分别针对F1用户面、F1控制面以及非F1数据的已应用的由目标donor-DU分配的TNL地址，以及这些数据之前使用的TNL地址(原donor-DU分配的TNL地址)。以便原donor-CU和目标donor-DU分别触发请求原donor-DU、目标donor-DU将这些数据从TNL隧道传输中移除。
另外，目标donor-DU中，目标donor-CU还对已配置了由目标donor-DU分配的TNL地址的下行数据进行业务映射信息的重配置，包括配置下行数据的新的TNL地址和DSCP对应的BAP目的地址和路径标识、下行数据的TNL地址和DSCP映射到目标donor-DU与下一跳IAB-node之间的回传RLC信道的标识。而且，donor-CU还移除这些下行数据之前的业务映射信息。
以上各个实施例仅对本申请实施例进行了示例性说明，但本申请不限于此，还可以在以上各个实施例的基础上进行适当的变型。例如，可以单独使用上述各个实施例，也可以将以上各个实施例中的一种或多种结合起来。
由上述实施例可知，第二宿主分布单元(目标donor-DU)为上行数据添加隧道相关的报头，以及通过TNL隧道向第一宿主分布单元(原donor-DU)发送上行数据。由此，在IAB-node迁移的原donor-DU和目标donor-DU之间建立TNL隧道，能够解决上行数据被丢弃的问题。
第二方面的实施例
本申请实施例提供一种IAB通信方法，从第一宿主分布单元对下行数据的传输进行说明。其中，IAB节点从第一宿主分布单元(source donor-DU)迁移到第二宿主分布单元(target donor-DU)，并且第一宿主分布单元和第二宿主分布单元之间建立传输网络层(TNL)隧道。
图18是本申请实施例的IAB通信方法的一示意图。如图18所示，所述方法包括：
1801，第一宿主分布单元接收向IAB节点发送的下行数据；
1802，第一宿主分布单元为下行数据添加TNL隧道相关的报头；以及
1803，第一宿主分布单元通过所述TNL隧道向第二宿主分布单元发送下行数据。
值得注意的是，以上附图18仅对本申请实施例进行了示意性说明，但本申请不限于此。例如可以适当地调整各个操作之间的执行顺序，此外还可以增加其他的一些操作或者减少其中的某些操作。本领域的技术人员可以根据上述内容进行适当地变型，而不仅限于上述附图18的记载。
在一些实施例中，所述报头包括如下至少之一：互联网协议(IP)报头、通用无线分组业务(GPRS)隧道协议(GTP)报头、用户数据报协议(UDP)报头或传输控制协议(TCP)报头。
在一些实施例中，所述报头的源传输网络层(TNL)地址为第一宿主分布单元的传输网络层(TNL)地址或能够通过所述第一宿主分布单元路由的TNL地址，报头的目标传输网络层(TNL)地址为第二宿主分布单元的传输网络层(TNL)地址。
例如，目标TNL地址为可通过原Donor-DU路由的TNL地址的下行数据由原donor-DU添加IP头部，或者还添加GTP/UDP或TCP头部。添加的IP头部以及GTP/UDP或TCP头部中的源TNL地址为原donor-DU的TNL地址，目标TNL地址为目标donor-DU侧隧道端点的TNL地址(即目标donor-DU的TNL地址)。
由此，在IAB-node迁移的原donor-DU和目标donor-DU之间建立TNL隧道。使得IAB-node进行跨宿主分布单元迁移时，目标TNL地址为可通过原Donor-DU路由的TNL地址的下行数据由原donor-DU通过该TNL隧道传输到目标donor-DU，由目标donor-DU通过BAP层路由到IAB-node或子节点，解决了下行数据不可路由至目标donor-DU，被原donor-DU丢弃的问题。
以下通过不同场景下的下行数据的传输，进一步对本申请实施例进行说明。
先对于intra-donor CU迁移的场景(例如称为场景1)的下行数据传输进行说明。该场景1下激活和去激活TNL隧道的示例可以参考附图10和11。
在一些实施例中，迁移IAB节点从第一宿主分布单元切换到第二宿主分布单元，或者，迁移IAB节点到第一宿主分布单元无线链路失败后RRC重建立到第二宿主分布单元；其中，第一宿主分布单元和第二宿主分布单元属于同一宿主集中单元(donor-CU)。
换言之，IAB-node进行intra-donor CU迁移(intra-donor CU migration)时，原 donor-DU和目标donor-DU之间进行TNL隧道传输。例如，当迁移IAB-node切换到新的父节点时，所有数据的传输路径从IAB-node的原父节点转移到新的父节点，donor-DU由原donor-DU变成目标donor-DU，无论迁移IAB-node和子节点是否被配置了由目标donor-DU分配的TNL地址，均会发生下行数据丢弃，需要目标donor-DU和原Donor-DU之间进行TNL隧道传输。
在一些实施例中，第一宿主分布单元接收宿主集中单元发送的TNL隧道传输建立请求，TNL隧道传输建立请求包括第二宿主分布单元的TNL隧道的端点TNL地址；TNL隧道传输建立请求用于请求第一宿主分布单元建立TNL隧道或者激活下行数据的TNL隧道传输。
在一些实施例中，在宿主集中单元接收到迁移IAB节点的切换完成消息，或宿主集中单元接收到IAB节点的RRC重建立完成消息后，或宿主集中单元没有为迁移IAB节点或其子节点配置由第二宿主分配单元分配的TNL地址时，第一宿主分布单元接收由宿主集中单元发送的TNL隧道传输建立请求。
在一些实施例中，TNL隧道传输建立请求还包括如下至少之一：需要激活通过TNL隧道传输的下行F1用户面的目标TNL地址、需要激活通过TNL隧道传输的下行F1控制面的目标TNL地址、需要激活通过TNL隧道传输的下行非F1数据的目标TNL地址。
例如，donor-CU向原donor-DU发送TNL隧道传输建立请求。该TNL隧道传输建立请求包含目标donor-DU侧的TNL隧道的端点TNL地址。此外，该TNL隧道传输建立请求可能还包含下行F1用户面的目标TNL地址、下行F1控制面的目标TNL地址、下行非F1数据的目标TNL地址。这里F1包括迁移IAB-node及其子节点的F1连接。
在一些实施例中，第一宿主分布单元向宿主集中单元发送TNL隧道传输建立响应，TNL隧道传输建立响应包括第一宿主分布单元的TNL隧道的端点TNL地址。
在一些实施例中，TNL隧道传输建立响应还包括如下至少之一：激活成功的通过TNL隧道传输的下行F1用户面的目标TNL地址、激活成功的通过TNL隧道传输的下行F1控制面的目标TNL地址、激活成功的通过TNL隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址。
例如，原donor-DU向donor-CU发送TNL隧道传输建立响应。该TNL隧道传输建立响应包含原donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输 建立响应可能还包含成功激活的通过隧道传输的下行F1用户面的目标TNL地址、成功激活的通过隧道传输的下行F1控制面的目标TNL地址、成功激活的通过隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址。
由此，原donor-DU的TNL隧道传输建立之后，原donor-DU将TNL隧道传输建立请求配置的下行数据(目的TNL地址为原Donor-DU分配的TNL地址)通过TNL隧道发送到目标donor-DU，然后可以被目标donor-DU的BAP层添加BAP路由标识后发送到迁移IaB-node或其子节点。
在一些实施例中，第一宿主分布单元接收宿主集中单元发送的TNL隧道传输更新或释放请求，该TNL隧道传输更新或释放请求包括第二宿主分布单元的TNL隧道的端点TNL地址；其中，TNL隧道传输更新或释放请求用于请求第一宿主分布单元去激活下行数据的TNL隧道传输或者释放TNL隧道。
例如，当donor-CU给IAB-node配置了由目标donor-DU分配的TNL地址(即可由目标donor-DU路由的TNL地址)之后，携带目标donor-DU分配的TNL地址的上下行数据不需要通过TNL传输即可成功发送到donor-CU或IAB-node，donor-CU可以对相关的上下行数据触发更新或释放TNL隧道传输。
在一些实施例中，在宿主集中单元为迁移IAB节点或其子节点配置由所述第二宿主分布单元分配的TNL地址后，或者，在迁移IAB节点完成切换的预设时间之后，或者，在迁移IAB节点完成重建立的预设时间之后，第一宿主分布单元接收由宿主集中单元发送的TNL隧道传输更新或释放请求。
例如，如果迁移IAB-node切换过程中donor-CU给迁移IAB-node配置了可通过目标donor-DU路由的针对F1-C和非F1数据的TNL地址，当完成切换的预设时间之后，donor-CU去激活对迁移IAB-node的F1-C和非F1数据的TNL隧道传输。
再例如，在完成切换之后，donor-CU又通过RRC重配置消息给迁移IAB-node配置可通过目标donor-DU路由的针对F1-U数据的TNL地址，当RRC重配置完成的预设时间之后，donor-CU去激活对迁移IAB-node的F1-U的TNL隧道传输。
为了使上下行的inflight数据分别通过TNL隧道的传输成功路由到donor-CU或IAB-node，当donor-CU给IAB-node配置了由目标donor-DU分配的TNL地址的预设时间之后，再触发更新或释放TNL隧道传输。
在一些实施例中，所述TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活的通过所述TNL隧道传输的下行F1用户面的目标TNL地址、需要去激活 的通过所述TNL隧道传输的下行F1控制面的目标TNL地址、需要去激活的通过所述TNL隧道传输的下行非F1数据的目标TNL地址。
例如，donor-CU向原donor-DU发送TNL隧道传输更新或释放请求。该TNL隧道传输更新或释放请求包含目标donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输更新或释放请求可能还包含需要去激活通过隧道传输的下行F1用户面的目标TNL地址、需要去激活通过隧道传输的下行F1控制面的目标TNL地址、需要去激活通过隧道传输的下行非F1数据的目标TNL地址。这里F1包括迁移IAB-node及其子节点的F1连接。
在一些实施例中，第一宿主分布单元向宿主集中单元发送TNL隧道传输更新或释放响应，TNL隧道传输更新或释放响应包括第一宿主分布单元的TNL隧道的端点TNL地址。
在一些实施例中，TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过TNL隧道传输的下行F1用户面的目标TNL地址、去激活成功的通过TNL隧道传输的下行F1控制面的目标TNL地址、去激活成功的通过TNL隧道传输的下行非F1数据的目标TNL地址、去激活失败的目标TNL地址。
例如，原donor-DU向donor-CU发送TNL隧道传输更新或释放响应。该TNL隧道传输更新或释放响应包含原donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输更新或释放响应可能还包含成功去激活通过隧道传输的下行F1用户面的目标TNL地址、成功去激活通过隧道传输的下行F1控制面的目标TNL地址、成功去激活通过隧道传输的下行非F1数据的目标TNL地址、去激活失败的目标TNL地址。
由此，原donor-DU的TNL隧道传输更新或释放之后，原donor-DU不会将去激活通过TNL隧道传输的下行数据(目的TNL地址为原Donor-DU分配的TNL地址)通过TNL隧道发送到目标donor-DU，而是直接丢弃。
再对于intra-donor CU双连接的场景(例如称为场景2)的下行数据传输进行说明。该场景2下激活和去激活TNL隧道的示例可以参考附图12和13。
在一些实施例中，所述IAB节点进行宿主集中单元内(intra-donor CU)的多路径分发，所述第一宿主分布单元和所述第二宿主分布单元属于同一宿主集中单元(donor-CU)。
换言之，IAB-node进行intra-donor CU的多路径分发(intra-donor CU topology  redundancy)时，原donor-DU和目标donor-DU之间进行TNL隧道传输。例如，当迁移IAB-node接入到新的父节点时，一部分数据的传输路径从IAB-node的原父节点转移到新的父节点，donor-DU由原donor-DU变成目标donor-DU，而另一部分数据的传输路径仍然经由原父节点、原donor-DU传输。对于传输路径被迁移到目标donor-DU的数据，如果没有被配置由目标donor-DU分配的TNL地址，会发生下行数据丢弃，需要目标donor-DU和原Donor-DU之间进行TNL隧道传输。
在一些实施例中，第一宿主分布单元接收宿主集中单元发送的TNL隧道传输建立请求，TNL隧道传输建立请求包括第二宿主分布单元的TNL隧道的端点TNL地址；TNL隧道传输建立请求用于请求第一宿主分布单元建立所述TNL隧道或者激活下行数据的TNL隧道传输。
在一些实施例中，在宿主集中单元将IAB节点的回传自适应协议(BAP)路由配置为第二宿主分布单元的BAP路由标识，但并没有配置由第二宿主分布单元分配的TNL地址的情况下，第一宿主分布单元接收由宿主集中单元发送的TNL隧道传输建立请求。
例如，当IAB-node数据的传输路径转移到新的父节点和目标donor-DU时，例如，当donor-CU为IAB-node配置可通过目标donor-DU路由的BAP地址以及将IAB-node的下行F1控制面和non-F1数据由目标donor-DU路由至IAB-node时，但并没有为IAB-node配置由目标donor-DU分配TNL地址，donor-CU触发建立TNL隧道传输。
在一些实施例中，所述TNL隧道传输建立请求还包括如下至少之一：需要激活通过TNL隧道传输的下行F1用户面的目标TNL地址、需要激活通过TNL隧道传输的下行F1控制面的目标TNL地址、需要激活TNL通过隧道传输的下行非F1数据的目标TNL地址、需要激活通过TNL隧道传输的下行F1用户面的GTP TEID。
例如，donor-CU向原donor-DU发送TNL隧道传输建立请求。该TNL隧道传输建立请求包含目标donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输建立请求可能还包含需要通过隧道传输的下行F1用户面的目标TNL地址、需要通过隧道传输的下行F1控制面的目标TNL地址、需要通过隧道传输的下行非F1数据的目标TNL地址。
这里F1包括迁移IAB-node及其子节点的F1连接。值得注意的是，因为下行F1用户面路径分发的最小粒度是UE承载，请求下行F1用户面隧道传输时，除了目的TNL地址还需要指示DL GTP TEID。
在一些实施例中，第一宿主分布单元向宿主集中单元发送TNL隧道传输建立响应，TNL隧道传输建立响应包括第一宿主分布单元的TNL隧道的端点TNL地址。
在一些实施例中，TNL隧道传输建立响应还包括如下至少之一：激活成功的通过TNL隧道传输的下行F1用户面的目标TNL地址、激活成功的通过TNL隧道传输的下行F1控制面的目标TNL地址、激活成功的通过TNL隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址。
例如，原donor-DU向donor-CU发送TNL隧道传输建立响应。该TNL隧道传输建立响应包含原donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输建立响应可能还包含成功激活的通过隧道传输的下行F1用户面的目标TNL地址、成功激活的通过隧道传输的下行F1控制面的目标TNL地址、成功激活的通过隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址。
由此，原donor-DU的TNL隧道传输建立之后，原donor-DU将TNL隧道传输建立请求配置的下行数据(目的TNL地址为原Donor-DU分配的TNL地址)通过TNL隧道发送到目标donor-DU，然后可以被目标donor-DU的BAP层添加BAP目的地址和路径标识后发送到迁移IaB-node或其子节点。
在一些实施例中，第一宿主分布单元接收宿主集中单元发送的TNL隧道传输更新或释放请求，该TNL隧道传输更新或释放请求包括第二宿主分布单元的TNL隧道的端点TNL地址；其中，TNL隧道传输更新或释放请求用于请求第一宿主分布单元去激活下行数据的TNL传输或者释放TNL隧道。
在一些实施例中，在宿主集中单元为IAB节点配置由第二宿主分布单元分配的TNL地址后，第一宿主分布单元接收由宿主集中单元发送的所述TNL隧道传输更新或释放请求。
例如，当为IAB-node迁移到目标donor-CU侧的数据配置了由目标donor-DU分配的TNL地址(即可通过目标donor-DU路由的TNL地址)之后，携带目标donor-DU分配的TNL地址的下行数据不需要通过TNL隧道传输即可成功发送到IAB-node，donor-CU可以对相关的下行数据触发更新或释放TNL隧道传输。
例如，如果迁移IAB-node连接到新的父节点，与新父节点建立双连接后，F1控制面数据和非F1数据迁移到目标donor-DU，当donor-CU为迁移IAB-node的F1控制面和非F1数据配置了由目标donor-DU分配的TNL地址时，donor-CU去激活对迁移IAB-node的F1-C和非F1数据的TNL隧道传输。
在一些实施例中，TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过TNL隧道传输的下行F1用户面的目标TNL地址、需要去激活通过TNL隧道传输的下行F1控制面的目标TNL地址、需要去激活通过TNL隧道传输的下行非F1数据的目标TNL地址、需要去激活通过TNL隧道传输的下行F1用户面的GTP TEID。
例如，donor-CU向原donor-DU发送TNL隧道传输更新或释放请求。该TNL隧道传输更新或释放请求包含目标donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输更新或释放请求可能还包含不需要通过隧道传输的下行F1用户面的目标TNL地址、不需要通过隧道传输的下行F1控制面的目标TNL地址、不需要通过隧道传输的下行非F1数据的目标TNL地址。
这里F1包括迁移IAB-node及其子节点的F1连接。值得注意的是，因为下行F1用户面路径分发的最小粒度是UE承载，请求将下行F1用户面移除隧道传输时，除了目的TNL地址还需要指示DL GTP TEID。
在一些实施例中，第一宿主分布单元向宿主集中单元发送TNL隧道传输更新或释放响应，TNL隧道传输更新或释放响应包括第一宿主分布单元的TNL隧道的端点TNL地址。
在一些实施例中，TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过TNL隧道传输的下行F1用户面的目标TNL地址、去激活成功的通过TNL隧道传输的下行F1控制面的目标TNL地址、去激活成功的通过TNL隧道传输的下行非F1数据的目标TNL地址、去激活失败的目标TNL地址。
例如，原donor-DU向donor-CU发送TNL隧道传输建立响应。该TNL隧道传输建立响应包含原donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输建立响应可能还包含成功激活的通过隧道传输的下行F1用户面的目标TNL地址、成功激活的通过隧道传输的下行F1控制面的目标TNL地址、成功激活的通过隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址。
由此，原donor-DU的TNL隧道传输更新或释放之后，原donor-DU不会将去激活通过TNL隧道传输的下行数据(目的TNL地址为原Donor-DU分配的TNL地址)通过TNL隧道发送到目标donor-DU，而是直接丢弃。
再对于inter-donor CU迁移的场景(例如称为场景3)的下行数据传输进行说明。该场景3下激活和去激活TNL隧道的示例可以参考附图14和15。
在一些实施例中，IAB节点从第一宿主分布单元切换到第二宿主分布单元，或者，所述IAB节点到第一宿主分布单元无线链路失败(RLF)后RRC重建立到第二宿主分布单元，第一宿主分布单元属于第一宿主集中单元，第二宿主分布单元属于第二宿主集中单元。
换言之，IAB-node进行inter-donor CU迁移(inter-donor-CU migration)时，原donor-DU和目标donor-DU之间进行TNL隧道传输。其中，原donor-DU由原donor-CU控制，目标donor-DU由目标donor-CU控制。
例如，当迁移IAB-node切换到目标donor-CU控制下的节点时，所有数据的传输路径从IAB-node的原donor-CU侧迁移到目标donor-CU侧，donor-DU由原donor-DU变成目标donor-DU，无论迁移IAB-node和子节点是否被配置了由目标donor-DU分配的TNL地址，均会发生下行数据丢弃，需要目标donor-DU和原Donor-DU之间进行TNL隧道传输。
在一些实施例中，第一宿主分布单元接收第一宿主集中单元发送的TNL隧道传输建立请求，TNL隧道传输建立请求包括第二宿主分布单元的TNL隧道的端点TNL地址；TNL隧道传输建立请求用于请求第一宿主分布单元建立TNL隧道或者激活下行数据的TNL隧道传输。
在一些实施例中，在第二宿主集中单元接收到IAB节点的切换完成消息，或第二宿主集中单元接收到IAB节点的RRC重建立完成消息后，或第二宿主集中单元没有为IAB节点配置由第二宿主分配单元分配的TNL地址时，第一宿主分布单元接收由第一宿主集中单元发送的TNL隧道传输建立请求。
例如，原donor-CU向目标donor-CU发送的针对迁移IAB-node的Handover Request消息包含原donor-DU侧的TNL隧道的端点TNL地址、由原donor-DU分配的迁移IAB-node的F1用户面、F1控制面和非F1数据使用的TNL地址，或者，还包括由原donor-DU分配的迁移IAB-node子节点的F1用户面、F1控制面和非F1数据使用的TNL地址。目标donor-CU向原donor-CU发送的针对迁移IAB-node的Handover Response消息包含目标donor-DU侧的TNL隧道的端点TNL地址。
在一些实施例中，TNL隧道传输建立请求还包括如下至少之一：需要激活通过TNL隧道传输的下行F1用户面的目标TNL地址、需要激活通过TNL隧道传输的下行F1控制面的目标TNL地址、需要激活通过TNL隧道传输的下行非F1数据的目标TNL地址。
例如，原donor-CU收到目标donor-CU发送IAB-node上下文释放指示时，向原donor-DU发送TNL隧道传输建立请求。该TNL隧道传输建立请求包含目标donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输建立请求可能还包含下行F1用户面的目标TNL地址、下行F1控制面的目标TNL地址、下行非F1数据的目标TNL地址。这里F1包括迁移IAB-node及其子节点的F1连接。
在一些实施例中，第一宿主分布单元向第一宿主集中单元发送TNL隧道传输建立响应，TNL隧道传输建立响应包括第一宿主分布单元的TNL隧道的端点TNL地址。
在一些实施例中，所述TNL隧道传输建立响应还包括如下至少之一：激活成功的通过TNL隧道传输的下行F1用户面的目标TNL地址、激活成功的通过TNL隧道传输的下行F1控制面的目标TNL地址、激活成功的通过TNL隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址。
例如，原donor-DU向原donor-CU发送TNL隧道传输建立响应。该TNL隧道传输建立响应包含原donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输建立响应可能还包含成功激活的通过隧道传输的下行F1用户面的目标TNL地址、成功激活的通过隧道传输的下行F1控制面的目标TNL地址、成功激活的通过隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址。
由此，原donor-DU的TNL隧道传输建立之后，原donor-DU将激活通过TNL隧道传输的下行数据(目的TNL地址为原Donor-DU分配的TNL地址)通过TNL隧道发送到目标donor-DU，然后可以被目标donor-DU的BAP层添加路由标识后发送到迁移IaB-node或其子节点。
在一些实施例中，第一宿主分布单元接收第一宿主集中单元发送的TNL隧道传输更新或释放请求，TNL隧道传输更新或释放请求包括第二宿主分布单元的TNL隧道的端点TNL地址；其中，TNL隧道传输建立请求用于请求第一宿主分布单元去激活下行数据的TNL隧道传输或释放TNL隧道。
例如，当目标donor-CU给IAB-node配置了由目标donor-DU分配的TNL地址(即可由目标donor-DU路由的TNL地址)之后，携带目标donor-DU分配的TNL地址的上下行数据不需要通过TNL隧道传输即可成功发送到原donor-CU或IAB-node，目标donor-CU可以对相关的上行数据触发更新或释放TNL隧道传输，原donor-CU可以对相关的下行数据触发更新或释放TNL隧道传输。
在一些实施例中，在第二宿主集中单元为所述IAB节点配置由第二宿主分布单 元分配的TNL地址后，或者，在所述IAB节点完成切换的预设时间之后，或者，在所述IAB节点完成重建立的预设时间之后，第一宿主分布单元接收由第一宿主集中单元发送的所述TNL隧道传输更新或释放请求。
例如，如果迁移IAB-node切换过程中目标donor-CU给迁移IAB-node配置了可通过目标donor-DU路由的针对F1-C和非F1数据的TNL地址，当完成切换的预设时间之后，目标donor-CU和原donor-CU去激活对迁移IAB-node的F1-C和非F1数据的TNL隧道传输。
再例如，在完成切换之后，目标donor-CU又通过RRC重配置消息给迁移IAB-node配置可通过目标donor-DU路由的针对F1-U数据的TNL地址，当RRC重配置完成的预设时间后，目标donor-CU和原donor-CU去激活对迁移IAB-node的F1-U的TNL隧道传输。
为了使下行的inflight数据通过TNL隧道的传输成功路由到IAB-node，当目标donor-CU给IAB-node配置了由目标donor-DU分配的TNL地址的预设时间之后，再触发更新或释放TNL隧道传输。
在一些实施例中，TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过TNL隧道传输的下行F1用户面的目标TNL地址、需要去激活通过TNL隧道传输的下行F1控制面的目标TNL地址、需要去激活通过TNL隧道传输的下行非F1数据的目标TNL地址。
例如，目标donor-CU向原donor-CU发送目标donor-DU为迁移IAB-node的F1用户面或F1控制面及非F1数据分配的TNL地址，或者，还包含目标donor-DU为迁移IAB-node子节点的F1用户面或F1控制面及非F1数据分配的TNL地址，例如，通过针对迁移IAB-node的Handover Response消息。
例如，原donor-CU向原donor-DU发送TNL隧道传输更新或释放请求。该TNL隧道传输更新或释放请求包含目标donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输更新或释放请求可能还包含不需要通过隧道传输的下行F1用户面的目标TNL地址、不需要通过隧道传输的下行F1控制面的目标TNL地址、不需要通过隧道传输的下行非F1数据的目标TNL地址。这里F1包括迁移IAB-node及其子节点的F1连接。
在一些实施例中，第一宿主分布单元向第一宿主集中单元发送TNL隧道传输更新或释放响应，TNL隧道传输更新或释放响应包括第一宿主分布单元的TNL隧道的 端点TNL地址。
在一些实施例中，TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过TNL隧道传输的下行F1用户面的目标TNL地址、去激活成功的通过TNL隧道传输的下行F1控制面的目标TNL地址、去激活成功的通过TNL隧道传输的下行非F1数据的目标TNL地址、去激活失败的目标TNL地址。
例如，目标donor-DU向目标donor-CU发送TNL隧道传输更新或释放响应。该TNL隧道传输更新或释放响应包含原donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输更新或释放响应可能还包含成功去激活的通过隧道传输的下行F1用户面的目标TNL地址、成功去激活的通过隧道传输的下行F1控制面的目标TNL地址、成功去激活的通过隧道传输的下行非F1数据的目标TNL地址、去激活失败的的目标TNL地址。
由此，原donor-DU的TNL隧道传输更新或释放之后，原donor-DU不会将去激活通过TNL隧道传输的下行数据(目的TNL地址为原Donor-DU分配的TNL地址)通过TNL隧道发送到目标donor-DU，而是直接丢弃。
再对于inter-donor CU双连接的场景(例如称为场景4)的下行数据传输进行说明。该场景4下激活和去激活TNL隧道的示例可以参考附图16和17。
在一些实施例中，所述IAB节点进行跨宿主集中单元(inter-donor CU)的多路径分发，所述第一宿主分布单元属于第一宿主集中单元，所述第二宿主分布单元属于第二宿主集中单元。
换言之，迁移IAB-node进行inter-donor CU的多路径分发(inter-donor CU topology redundancy)时，原donor-DU和目标donor-DU之间进行TNL隧道传输。其中，原donor-DU由原donor-CU控制，目标donor-DU由目标donor-CU控制。
例如，当迁移IAB-node接入到目标donor-CU控制下的节点时，一部分数据的传输路径从IAB-node的原donor-CU侧迁移到目标donor-CU侧，donor-DU由原donor-DU变成目标donor-DU，而另一部分数据的传输路径仍然经由原父节点、原donor-DU传输。对于传输路径被迁移到目标donor-DU的数据，如果没有被配置由目标donor-DU分配的TNL地址，会发生下行数据丢弃，需要目标donor-DU和原Donor-DU之间进行TNL隧道传输。
在一些实施例中，第一宿主分布单元接收第一宿主集中单元发送的TNL隧道传输建立请求，TNL隧道传输建立请求包括第二宿主分布单元的TNL隧道的端点TNL 地址；TNL隧道传输建立请求用于请求第一宿主分布单元建立所述TNL隧道或者激活下行数据的TNL隧道传输。
在一些实施例中，在所述第二宿主集中单元将IAB节点的回传自适应协议(BAP)路由配置为第二宿主分布单元的BAP路由标识，但并没有为IAB节点配置由第二宿主分布单元分配的TNL地址的情况下，第一宿主分布单元接收由第一宿主集中单元发送的TNL隧道传输建立请求。
例如，原donor-CU向目标donor-CU发送原donor-DU侧的TNL隧道的端点TNL地址、请求迁移到目标donor-CU侧的迁移IAB-node或子节点的下行F1用户面、F1控制面或非F1数据，以及由原donor-DU分配给这些数据的TNL地址。例如，通过针对迁移IAB-node的SgNB node addition request消息或SgNB node modification request。目标donor-CU向原donor-CU发送目标donor-DU侧的TNL隧道的端点TNL地址，例如通过针对迁移IAB-node的SgNB node addition response消息或SgNB node modification response消息。
例如，当IAB-node数据的传输路径转移到目标donor-CU侧时，也即当目标donor-CU为IAB-node配置可由目标donor-DU路由的BAP地址以及将IAB-node的下行F1控制面和non-F1数据由目标donor-DU路由至IAB-node，但并没有为IAB-node配置目标donor-DU分配的TNL地址时，目标donor-CU、原donor-CU触发建立TNL隧道传输。
在一些实施例中，所述TNL隧道传输建立请求还包括如下至少之一：需要激活通过TNL隧道传输的下行F1用户面的目标TNL地址、需要激活通过TNL隧道传输的下行F1控制面的目标TNL地址、需要激活通过TNL隧道传输的下行非F1数据的目标TNL地址、需要激活通过TNL隧道传输的下行F1用户面的GTP TEID。
例如，目标donor-CU向原donor-CU发送成功迁移到目标donor-CU侧的迁移IAB-node或子节点的上行F1用户面、F1控制面或非F1数据，迁移IAB-node或子节点的下行F1用户面、F1控制面或非F1数据，或者，还包含由目标donor-DU分配给这些数据的TNL地址，例如，通过针对迁移IAB-node的SgNB node addition response消息或SgNB node modification response消息。若SgNB node addition response消息或SgNB node modification response消息不包含由目标donor-DU分配给这些数据的TNL地址，原donor-CU向原donor-DU发送TNL隧道传输建立请求。
例如，该TNL隧道传输建立请求中包含目标donor-DU侧的TNL隧道的端点TNL 地址；此外，该TNL隧道传输建立请求可能还包含下行F1用户面的目标TNL地址、下行F1控制面的目标TNL地址、下行非F1数据的目标TNL地址。
这里F1包括迁移IAB-node及其子节点的F1连接。值得注意的是，因为下行F1用户面路径分发的最小粒度是UE承载，请求下行F1用户面隧道传输时，除了目的TNL地址还需要指示DL GTP TEID。
在一些实施例中，第一宿主分布单元向第一宿主集中单元发送TNL隧道传输建立响应，TNL隧道传输建立响应包括第一宿主分布单元的TNL隧道的端点TNL地址。
在一些实施例中，TNL隧道传输建立响应还包括如下至少之一：激活成功的通过TNL隧道传输的下行F1用户面的目标TNL地址、激活成功的通过TNL隧道传输的下行F1控制面的目标TNL地址、激活成功的通过TNL隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址。
例如，原donor-DU向原donor-CU发送TNL隧道传输建立响应。该TNL隧道传输建立响应包含原donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输建立响应可能还包含成功激活的通过隧道传输的下行F1用户面的目标TNL地址、成功激活的通过隧道传输的下行F1控制面的目标TNL地址、成功激活的通过隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址。
由此，原donor-DU的TNL隧道传输建立之后，原donor-DU将激活通过TNL隧道传输的下行数据(目的TNL地址为原Donor-DU分配的TNL地址)通过TNL隧道发送到目标donor-DU，然后可以被目标donor-DU的BAP层添加BAP路由标识后发送到迁移IaB-node或其子节点。
在一些实施例中，第一宿主分布单元接收第一宿主集中单元发送的TNL隧道传输更新或释放请求，TNL隧道传输更新或释放请求包括第二宿主分布单元的TNL隧道的端点TNL地址；其中，TNL隧道传输更新或释放请求用于请求第一宿主分布单元去激活下行数据的TNL传输或者释放TNL隧道。
在一些实施例中，在第二宿主集中单元为IAB节点配置由第二宿主分布单元分配的TNL地址后，第一宿主分布单元接收由第一宿主集中单元发送的TNL隧道传输更新或释放请求。
例如，当目标donor-CU给IAB-node配置了由目标donor-DU分配的TNL地址(即可由目标donor-DU路由的TNL地址)之后，携带目标donor-DU分配的TNL地址的下行数据不需要通过TNL隧道传输即可成功发送到原donor-CU或IAB-node，原 donor-CU可以对相关的下行数据触发更新或释放TNL隧道传输。
例如，如果迁移IAB-node连接到新的父节点，与新父节点建立双连接后，F1控制面数据和非F1数据迁移到目标donor-DU，当目标donor-CU为迁移IAB-node的F1控制面和非F1数据配置了由目标donor-DU分配的TNL地址时，目标donor-CU、原donor-CU去激活对迁移IAB-node的F1-C和非F1数据的TNL隧道传输。
在一些实施例中，所述TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过TNL隧道传输的下行F1用户面的目标TNL地址、需要去激活通过TNL隧道传输的下行F1控制面的目标TNL地址、需要去激活通过TNL隧道传输的下行非F1数据的目标TNL地址、需要去激活通过TNL隧道传输的下行F1用户面的GTP TEID。
例如，目标donor-CU向原donor-CU发送目标donor-DU为已迁移至目标donor-CU侧的迁移IAB-node的F1用户面或F1控制面及非F1数据分配的TNL地址，或者，还包含目标donor-DU为已迁移至目标donor-CU侧的迁移IAB-node子节点的F1用户面或F1控制面及非F1数据分配的TNL地址。
原donor-CU向原donor-DU发送TNL隧道传输更新或释放请求。该TNL隧道传输更新或释放请求包含目标donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输更新或释放请求可能还包含不需要通过隧道传输的下行F1用户面的目标TNL地址、不需要通过隧道传输的下行F1控制面的目标TNL地址、不需要通过隧道传输的下行非F1数据的目标TNL地址。
这里F1包括迁移IAB-node及其子节点的F1连接。值得注意的是，因为下行F1用户面路径分发的最小粒度是UE承载，请求将下行F1用户面移除隧道传输时，除了目的TNL地址还需要指示DL GTP TEID。
在一些实施例中，第一宿主分布单元向第一宿主集中单元发送TNL隧道传输更新或释放响应，TNL隧道传输更新或释放响应包括第一宿主分布单元的TNL隧道的端点TNL地址。
在一些实施例中，所述TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过TNL隧道传输的下行F1用户面的目标TNL地址、去激活成功的通过TNL隧道传输的下行F1控制面的目标TNL地址、去激活成功的通过TNL隧道传输的下行非F1数据的目标TNL地址、去激活失败的目标TNL地址。
例如，原donor-DU向原donor-CU发送TNL隧道传输更新或释放响应。该TNL 隧道传输更新或释放响应包含原donor-DU侧的TNL隧道的端点TNL地址；此外，该TNL隧道传输更新或释放响应可能还包含成功去激活的通过隧道传输的下行F1用户面的目标TNL地址、成功去激活的通过隧道传输的下行F1控制面的目标TNL地址、成功去激活的通过隧道传输的下行非F1数据的目标TNL地址、去激活失败的目标TNL地址。
由此，原donor-DU的TNL隧道传输更新或释放之后，原donor-DU不会将去激活通过TNL隧道传输的下行数据(目的TNL地址为原Donor-DU分配的TNL地址)通过TNL隧道发送到目标donor-DU，而是直接丢弃。
以上各个实施例仅对本申请实施例进行了示例性说明，但本申请不限于此，还可以在以上各个实施例的基础上进行适当的变型。例如，可以单独使用上述各个实施例，也可以将以上各个实施例中的一种或多种结合起来。
由上述实施例可知，第一宿主分布单元(原donor-DU)为下行数据添加隧道相关的报头，以及通过TNL隧道向第二宿主分布单元(目标donor-DU)发送下行数据。由此，在IAB-node迁移的原donor-DU和目标donor-DU之间建立TNL隧道，能够解决下行数据被丢弃的问题。
第三方面的实施例
本申请实施例提供一种IAB通信方法，从宿主集中单元(donor-CU)进行说明，与第一、二方面的实施例相同的内容不再赘述。
在一些实施例中，IAB节点从第一宿主分布单元迁移到第二宿主分布单元；所述第一宿主分布单元和所述第二宿主分布单元属于同一宿主集中单元。IAB节点进行intra-donor CU迁移(场景1)或intra-donor CU双连接(场景2)。
在一些实施例中，宿主集中单元指示第二宿主分布单元接收由IAB节点发送的上行数据，并通过第二宿主分布单元与第一宿主分布单元之间的传输网络层(TNL)隧道向第一宿主分布单元发送上行数据；
在一些实施例中，宿主集中单元指示第一宿主分布单元接收向IAB节点发送的下行数据，并通过第一宿主分布单元与第二宿主分布单元之间的传输网络层(TNL)隧道向第二宿主分布单元发送下行数据；
这里，IAB节点包括迁移IAB节点或其子节点。
在一些实施例中，IAB节点从第一宿主分布单元迁移到第二宿主分布单元；第一 宿主分布单元属于第一宿主集中单元，第二宿主分布单元属于第二宿主集中单元。IAB节点进行inter-donor CU迁移(场景3)或inter-donor CU双连接(场景4)。
在一些实施例中，第二宿主集中单元指示第二宿主分布单元接收由IAB节点发送的上行数据，并通过第二宿主分布单元与第一宿主分布单元之间的传输网络层(TNL)隧道向第一宿主分布单元发送上行数据。
例如，第二宿主集中单元向第二宿主分布单元发送TNL隧道传输建立请求，该TNL隧道传输建立请求包括第一宿主分布单元的TNL隧道端点TNL地址；其中，TNL隧道传输建立请求用于请求第二宿主分布单元建立TNL隧道或激活上行数据的TNL隧道传输。
例如，第一宿主分布单元的TNL隧道端点TNL地址由第一宿主集中单元发送给第二宿主集中单元。
再例如，当至少出现以下情况之一时，第二宿主集中单元向第二宿主分布单元发送TNL隧道传输建立请求：
所述第二宿主集中单元收到迁移IAB节点的切换完成消息后，
所述第二宿主集中单元收到迁移IAB节点的RRC重建立完成消息后，
所述第二宿主集中单元没有为迁移IAB节点或其子节点配置由第二宿主分布单元分配的TNL地址。
再例如，第二宿主集中单元还接收第一宿主集中单元发送的由第一宿主分布单元为IAB节点分配的TNL地址，以便第二宿主集中单元向第二宿主分布单元发送TNL隧道传输建立请求。
在一些实施例中，第一宿主集中单元指示第一宿主分布单元接收向IAB节点发送的下行数据，并通过第一宿主分布单元与第二宿主分布单元之间的传输网络层(TNL)隧道向第二宿主分布单元发送下行数据。
例如，第一宿主集中单元还向第一宿主分布单元发送TNL隧道传输更新或释放请求，TNL隧道传输更新或释放请求包括第二宿主分布单元的TNL隧道端点TNL地址；其中，TNL隧道传输更新或释放请求用于请求第一宿主分布单元去激活下行数据的TNL隧道传输或释放TNL隧道。这里，IAB节点包括迁移IAB节点或其子节点。
例如，第二宿主分布单元的TNL隧道端点TNL地址由第二宿主集中单元发送给第一宿主集中单元。
例如，在第二宿主集中单元为IAB节点配置由第二宿主分布单元分配的TNL地址后，第一宿主集中单元向第一宿主分布单元发送TNL隧道传输更新或释放请求。
再例如，所述第二宿主集中单元还向第一宿主集中单元发送由第二宿主分布单元为IAB节点分配的TNL地址，以触发第一宿主集中单元向第一宿主分布单元发送TNL隧道传输更新或释放请求。
以上各个实施例仅对本申请实施例进行了示例性说明，但本申请不限于此，还可以在以上各个实施例的基础上进行适当的变型。例如，可以单独使用上述各个实施例，也可以将以上各个实施例中的一种或多种结合起来。
由上述实施例可知，通过donor-CU的指示和/或目标donor-CU与原donor-CU之间的交互，在IAB-node迁移的原donor-DU和目标donor-DU之间建立TNL隧道，能够解决上下行数据被丢弃的问题。
第四方面的实施例
本申请实施例提供一种IAB通信装置，该装置例如可以是IAB系统中的IAB-donor设备，也可以是配置于该IAB-donor设备中的某个或某些部件或者组件或者模块。该IAB系统包括IAB-donor设备和IAB节点；IAB-donor设备又可以包括IAB-donor-CU和IAB-donor-DU。
图19是本申请实施例的IAB通信装置的一示意图。如图19所示，IAB通信装置1900包括：接收部1901、处理部1902和发送部1903。
在一些实施例中，接收部1901接收由IAB节点发送的上行数据；处理部1902为上行数据添加传输网络层隧道相关的报头；以及发送部1903通过传输网络层隧道向第一宿主分布单元发送上行数据。
在一些实施例中，报头包括如下至少之一：互联网协议报头、通用无线分组业务隧道协议报头、用户数据报协议报头或传输控制协议报头。
在一些实施例中，报头的源传输网络层地址为第二宿主分布单元的TNL地址或者能够通过第二宿主分布单元路由的TNL地址，报头的目标TNL地址为第一宿主分布单元的TNL地址。
在一些实施例中，IAB节点从第一宿主分布单元切换到第二宿主分布单元，或者，IAB节点到第一宿主分布单元的无线链路失败后无线资源控制重建立到第二宿主分布单元；其中，第一宿主分布单元和第二宿主分布单元属于同一宿主集中单元。
在一些实施例中，接收部1901还接收宿主集中单元发送的TNL隧道传输建立请求，TNL隧道传输建立请求包括第一宿主分布单元的TNL隧道的端点TNL地址；其中，TNL隧道传输建立请求用于请求第二宿主分布单元建立TNL隧道或激活上行数据的TNL隧道传输；
其中，TNL隧道传输建立请求还包括如下至少之一：需要激活通过TNL隧道传输的上行F1用户面的源TNL地址、需要激活通过TNL隧道传输的上行F1控制面的源TNL地址、需要激活通过TNL隧道传输的上行非F1数据的源TNL地址。
在一些实施例中，发送部1903还向宿主集中单元发送TNL隧道传输建立响应，TNL隧道传输建立响应包括第二宿主分布单元的TNL隧道的端点TNL地址；
其中，TNL隧道传输建立响应还包括如下至少之一：激活成功的通过TNL隧道传输的上行F1用户面的源TNL地址、激活成功的通过TNL隧道传输的上行F1控制面的源TNL地址、激活成功的通过TNL隧道传输的上行非F1数据的源TNL地址、激活失败的源TNL地址。
在一些实施例中，接收部1901还接收宿主集中单元发送的业务映射信息，业务映射信息用于配置通过TNL隧道传输的下行数据的回传自适应协议(BAP)路由标识以及第二宿主分布单元和下一跳子节点之间的回传RLC信道。
在一些实施例中，接收部1901还接收宿主集中单元发送的TNL隧道传输更新或释放请求，TNL隧道传输更新或释放请求包括第一宿主分布单元的TNL隧道的端点TNL地址；TNL隧道传输更新或释放请求用于请求第二宿主单元去激活上行数据的TNL隧道传输或者释放TNL隧道；
其中，TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过TNL隧道传输的上行F1用户面的源TNL地址、需要去激活通过TNL隧道传输的上行F1控制面的源TNL地址、需要去激活通过TNL隧道传输的上行非F1数据的源TNL地址。
在一些实施例中，发送部1903还向宿主集中单元发送TNL隧道传输更新或释放响应，TNL隧道传输更新或释放响应包括第二宿主分布单元的TNL隧道的端点TNL地址；
其中，TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过TNL隧道传输的上行F1用户面的源TNL地址、去激活成功的通过TNL隧道传输的上行F1控制面的源TNL地址、去激活成功的通过TNL隧道传输的上行非F1数据的 源TNL地址、去激活失败的源TNL地址。
在一些实施例中，接收部1901还接收宿主集中单元发送的业务映射信息释放指示，业务映射信息释放指示用于释放去激活通过TNL隧道传输的下行数据的BAP路由标识以及第二宿主分布单元和下一跳子节点之间的回传RLC信道的配置。
在一些实施例中，IAB节点进行宿主集中单元内的多路径分发，第一宿主分布单元和第二宿主分布单元属于同一宿主集中单元。
在一些实施例中，接收部1901接收宿主集中单元发送的TNL隧道传输建立请求，TNL隧道传输建立请求包括第一宿主分布单元的TNL隧道的端点TNL地址；其中，TNL隧道传输建立请求用于请求第二宿主分布单元建立TNL隧道或者激活上行数据的TNL隧道传输；
其中，TNL隧道传输建立请求还包括如下至少之一：需要激活通过TNL隧道传输的上行F1用户面的源TNL地址、需要激活通过TNL隧道传输的上行F1控制面的源TNL地址、需要激活通过TNL隧道传输的上行非F1数据的源TNL地址、需要激活通过TNL隧道传输的上行F1用户面的GTP隧道端点标识。
在一些实施例中，发送部1903还向宿主集中单元发送TNL隧道传输建立响应，TNL隧道传输建立响应包括第二宿主分布单元的TNL隧道的端点TNL地址；
其中，TNL隧道传输建立响应还包括如下至少之一：激活成功的通过TNL隧道传输的上行F1用户面的源TNL地址、激活成功的通过TNL隧道传输的上行F1控制面的源TNL地址、激活成功的通过TNL隧道传输的上行非F1数据的源TNL地址、激活失败的源TNL地址。
在一些实施例中，接收部1901还接收宿主集中单元配置的业务映射信息，业务映射信息用于配置通过TNL隧道传输的下行数据的BAP路由标识以及第二宿主分布单元和下一跳子节点之间的回传RLC信道。
在一些实施例中，接收部1901还接收宿主集中单元发送的TNL隧道传输更新或释放请求，TNL隧道传输更新或释放请求包括第一宿主分布单元的TNL隧道的端点TNL地址；TNL隧道传输更新或释放请求用于请求第二宿主单元去激活上行数据的TNL隧道传输或者释放TNL隧道；
其中，TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过TNL隧道传输的上行F1用户面的源TNL地址、需要去激活通过TNL隧道传输的上行F1控制面的源TNL地址、需要去激活通过TNL隧道传输的上行非F1数据的源TNL地 址、需要去激活通过TNL隧道传输的上行F1用户面的GTP TEID。
在一些实施例中，发送部1903还向宿主集中单元发送TNL隧道传输更新或释放响应，TNL隧道传输更新或释放响应包括第二宿主分布单元的TNL隧道的端点TNL地址；
其中，TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过TNL隧道传输的上行F1用户面的源TNL地址、去激活成功的通过TNL隧道传输的上行F1控制面的源TNL地址、去激活成功的通过TNL隧道传输的上行非F1数据的源TNL地址、去激活失败的源TNL地址。
在一些实施例中，接收部1901还接收由宿主集中单元发送的业务映射信息释放指示，业务映射信息释放指示用于释放去激活通过TNL隧道传输的下行数据的BAP路由标识以及第二宿主分布单元和下一跳子节点之间的回传RLC信道的配置。
在一些实施例中，IAB节点从第一宿主分布单元切换到第二宿主分布单元，或者，IAB节点到第一宿主分布单元无线链路失败后RRC重建立到第二宿主分布单元，第一宿主分布单元属于第一宿主集中单元，第二宿主分布单元属于第二宿主集中单元。
在一些实施例中，接收部1901还接收第二宿主集中单元发送的TNL隧道传输建立请求，TNL隧道传输建立请求包括第一宿主分布单元的TNL隧道的端点TNL地址；其中，TNL隧道传输建立请求用于请求第二宿主分布单元建立TNL隧道或激活上行数据的TNL隧道传输；
其中，TNL隧道传输建立请求还包括如下至少之一：需要激活通过TNL隧道传输的上行F1用户面的源TNL地址、需要激活通过TNL隧道传输的上行F1控制面的源TNL地址、需要激活通过TNL隧道传输的上行非F1数据的源TNL地址。
在一些实施例中，发送部1903还向第二宿主集中单元发送TNL隧道传输建立响应，TNL隧道传输建立响应包括第二宿主分布单元的TNL隧道的端点TNL地址；
其中，TNL隧道传输建立响应还包括如下至少之一：激活成功的通过TNL隧道传输的上行F1用户面的源TNL地址、激活成功的通过TNL隧道传输的上行F1控制面的源TNL地址、激活成功的通过TNL隧道传输的上行非F1数据的源TNL地址、激活失败的源TNL地址。
在一些实施例中，接收部1901还接收宿主集中单元发送的业务映射信息，业务映射信息用于配置通过TNL隧道传输的下行数据的BAP路由标识以及第二宿主分布单元和下一跳子节点之间的回传RLC信道。
在一些实施例中，接收部1901还接收第二宿主集中单元发送的TNL隧道传输更新或释放请求，TNL隧道传输更新或释放请求包括第一宿主分布单元的TNL隧道的端点TNL地址；TNL隧道传输更新或释放请求用于请求第二宿主单元去激活上行数据的TNL隧道传输或者释放TNL隧道；
其中，TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过TNL隧道传输的上行F1用户面的源TNL地址、需要去激活通过TNL隧道传输的上行F1控制面的源TNL地址、需要去激活通过TNL隧道传输的上行非F1数据的源TNL地址。
在一些实施例中，发送部1903还向第二宿主集中单元发送TNL隧道传输更新或释放响应，TNL隧道传输更新或释放响应包括第二宿主分布单元的TNL隧道的端点TNL地址；
其中，TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过TNL隧道传输的上行F1用户面的源TNL地址、去激活成功的通过TNL隧道传输的上行F1控制面的源TNL地址、去激活成功的通过TNL隧道传输的上行非F1数据的源TNL地址、去激活失败的源TNL地址。
在一些实施例中，接收部1901还接收由宿主集中单元发送的业务映射信息释放指示，业务映射信息释放指示用于释放去激活通过TNL隧道传输的下行数据的BAP路由标识以及第二宿主分布单元和下一跳子节点之间的回传RLC信道的配置。
在一些实施例中，IAB节点进行跨宿主集中单元的多路径分发，第一宿主分布单元属于第一宿主集中单元，第二宿主分布单元属于第二宿主集中单元。
在一些实施例中，接收部1901还接收第二宿主集中单元发送的TNL隧道传输建立请求，TNL隧道传输建立请求包括第一宿主分布单元的TNL隧道的端点TNL地址；其中，TNL隧道传输建立请求用于请求第二宿主分布单元建立TNL隧道或者激活上行数据的TNL隧道传输；
其中，TNL隧道传输建立请求还包括如下至少之一：需要激活通过TNL隧道传输的上行F1用户面的源TNL地址、需要激活通过TNL隧道传输的上行F1控制面的源TNL地址、需要激活通过TNL隧道传输的上行非F1数据的源TNL地址、需要激活通过TNL隧道传输的上行F1用户面的GTP TEID。
在一些实施例中，发送部1903还向第二宿主集中单元发送TNL隧道传输建立响应，TNL隧道传输建立响应包括第二宿主分布单元的TNL隧道的端点TNL地址；
其中，TNL隧道传输建立响应还包括如下至少之一：激活成功的通过TNL隧道传输的上行F1用户面的源TNL地址、激活成功的通过TNL隧道传输的上行F1控制面的源TNL地址、激活成功的通过TNL隧道传输的上行非F1数据的源TNL地址、激活失败的源TNL地址。
在一些实施例中，接收部1901还接收宿主集中单元发送的业务映射信息，业务映射信息用于配置通过TNL隧道传输的下行数据的BAP路由标识以及第二宿主分布单元和下一跳子节点之间的回传RLC信道。
在一些实施例中，接收部1901还接收第二宿主集中单元发送的TNL隧道传输更新或释放请求，TNL隧道传输更新或释放请求包括第一宿主分布单元的TNL隧道的端点TNL地址；TNL隧道传输更新或释放请求用于请求第二宿主单元去激活上行数据的TNL隧道传输或者释放TNL隧道；
其中，TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过TNL隧道传输的上行F1用户面的源TNL地址、需要去激活通过TNL隧道传输的上行F1控制面的源TNL地址、需要去激活通过TNL隧道传输的上行非F1数据的源TNL地址、需要去激活通过TNL隧道传输的上行F1用户面的GTP TEID。
在一些实施例中，发送部1903还向第二宿主集中单元发送TNL隧道传输更新或释放响应，TNL隧道传输更新或释放响应包括第二宿主分布单元的TNL隧道的端点TNL地址；
其中，TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过TNL隧道传输的上行F1用户面的源TNL地址、去激活成功的通过TNL隧道传输的上行F1控制面的源TNL地址、去激活成功的通过TNL隧道传输的上行非F1数据的源TNL地址、去激活失败的源TNL地址。
在一些实施例中，接收部1901还接收由宿主集中单元发送的业务映射信息释放指示，业务映射信息释放指示用于释放去激活通过TNL隧道传输的下行数据的BAP路由标识以及第二宿主分布单元和下一跳子节点之间的回传RLC信道的配置。
在一些实施例中，接收部1901接收向IAB节点发送的下行数据；处理部1902为下行数据添加传输网络层隧道相关的报头；以及发送部1903通过传输网络层隧道向第二宿主分布单元发送下行数据。
在一些实施例中，报头包括如下至少之一：互联网协议报头、通用无线分组业务隧道协议报头、用户数据报协议报头或传输控制协议报头；
在一些实施例中，报头的源传输网络层地址为第一宿主分布单元的传输网络层地址或能够通过第一宿主分布单元路由的TNL地址，报头的目标传输网络层地址为第二宿主分布单元的传输网络层地址。
在一些实施例中，IAB节点从第一宿主分布单元切换到第二宿主分布单元，或者，IAB节点到第一宿主分布单元无线链路失败后RRC重建立到第二宿主分布单元；其中，第一宿主分布单元和第二宿主分布单元属于同一宿主集中单元。
在一些实施例中，接收部1901还接收宿主集中单元发送的TNL隧道传输建立请求，TNL隧道传输建立请求包括第二宿主分布单元的TNL隧道的端点TNL地址；TNL隧道传输建立请求用于请求第一宿主分布单元建立TNL隧道或者激活下行数据的TNL隧道传输；
其中，TNL隧道传输建立请求还包括如下至少之一：需要激活通过TNL隧道传输的下行F1用户面的目标TNL地址、需要激活通过TNL隧道传输的下行F1控制面的目标TNL地址、需要激活通过TNL隧道传输的下行非F1数据的目标TNL地址。
在一些实施例中，发送部1903还向宿主集中单元发送TNL隧道传输建立响应，TNL隧道传输建立响应包括第一宿主分布单元的TNL隧道的端点TNL地址；
其中，TNL隧道传输建立响应还包括如下至少之一：激活成功的通过TNL隧道传输的下行F1用户面的目标TNL地址、激活成功的通过TNL隧道传输的下行F1控制面的目标TNL地址、激活成功的通过TNL隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址。
在一些实施例中，接收部1901还接收宿主集中单元发送的TNL隧道传输更新或释放请求，TNL隧道传输更新或释放请求包括第二宿主分布单元的TNL隧道的端点TNL地址；其中，TNL隧道传输更新或释放请求用于请求所述第一宿主分布单元去激活下行数据的TNL隧道传输或者释放TNL隧道；
其中，TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活的通过TNL隧道传输的下行F1用户面的目标TNL地址、需要去激活的通过TNL隧道传输的下行F1控制面的目标TNL地址、需要去激活的通过TNL隧道传输的下行非F1数据的目标TNL地址。
在一些实施例中，发送部1903还向宿主集中单元发送TNL隧道传输更新或释放响应，TNL隧道传输更新或释放响应包括第一宿主分布单元的TNL隧道的端点TNL地址；
其中，TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过TNL隧道传输的下行F1用户面的目标TNL地址、去激活成功的通过TNL隧道传输的下行F1控制面的目标TNL地址、去激活成功的通过TNL隧道传输的下行非F1数据的目标TNL地址、去激活失败的目标TNL地址。
在一些实施例中，IAB节点进行宿主集中单元内的多路径分发，第一宿主分布单元和第二宿主分布单元属于同一宿主集中单元。
在一些实施例中，接收部1901还接收宿主集中单元发送的TNL隧道传输建立请求，TNL隧道传输建立请求包括第二宿主分布单元的TNL隧道的端点TNL地址；TNL隧道传输建立请求用于请求第一宿主分布单元建立TNL隧道或者激活下行数据的TNL隧道传输；
其中，TNL隧道传输建立请求还包括如下至少之一：需要激活通过TNL隧道传输的下行F1用户面的目标TNL地址、需要激活通过TNL隧道传输的下行F1控制面的目标TNL地址、需要激活TNL通过隧道传输的下行非F1数据的目标TNL地址、需要激活通过TNL隧道传输的下行F1用户面的GTP TEID。
在一些实施例中，发送部1903还向宿主集中单元发送TNL隧道传输建立响应，TNL隧道传输建立响应包括第一宿主分布单元的TNL隧道的端点TNL地址；
其中，TNL隧道传输建立响应还包括如下至少之一：激活成功的通过TNL隧道传输的下行F1用户面的目标TNL地址、激活成功的通过TNL隧道传输的下行F1控制面的目标TNL地址、激活成功的通过TNL隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址。
在一些实施例中，接收部1901还接收宿主集中单元发送的TNL隧道传输更新或释放请求，TNL隧道传输更新或释放请求包括第二宿主分布单元的TNL隧道的端点TNL地址；其中，TNL隧道传输更新或释放请求用于请求第一宿主分布单元去激活下行数据的TNL传输或者释放TNL隧道；
其中，TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过TNL隧道传输的下行F1用户面的目标TNL地址、需要去激活通过TNL隧道传输的下行F1控制面的目标TNL地址、需要去激活通过TNL隧道传输的下行非F1数据的目标TNL地址、需要去激活通过TNL隧道传输的下行F1用户面的GTP TEID。
在一些实施例中，发送部1903还向宿主集中单元发送TNL隧道传输更新或释放响应，TNL隧道传输更新或释放响应包括第一宿主分布单元的TNL隧道的端点TNL 地址；
其中，TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过TNL隧道传输的下行F1用户面的目标TNL地址、去激活成功的通过TNL隧道传输的下行F1控制面的目标TNL地址、去激活成功的通过TNL隧道传输的下行非F1数据的目标TNL地址、去激活失败的目标TNL地址。
在一些实施例中，IAB节点从第一宿主分布单元切换到所述第二宿主分布单元，或者，IAB节点到第一宿主分布单元无线链路失败后RRC重建立到第二宿主分布单元，第一宿主分布单元属于第一宿主集中单元，第二宿主分布单元属于第二宿主集中单元。
在一些实施例中，接收部1901还接收第一宿主集中单元发送的TNL隧道传输建立请求，TNL隧道传输建立请求包括第二宿主分布单元的TNL隧道的端点TNL地址；TNL隧道传输建立请求用于请求第一宿主分布单元建立TNL隧道或者激活下行数据的TNL隧道传输；
其中，TNL隧道传输建立请求还包括如下至少之一：需要激活通过TNL隧道传输的下行F1用户面的目标TNL地址、需要激活通过TNL隧道传输的下行F1控制面的目标TNL地址、需要激活通过TNL隧道传输的下行非F1数据的目标TNL地址。
在一些实施例中，发送部1903还向第一宿主集中单元发送TNL隧道传输建立响应，TNL隧道传输建立响应包括第一宿主分布单元的TNL隧道的端点TNL地址；
其中，TNL隧道传输建立响应还包括如下至少之一：激活成功的通过TNL隧道传输的下行F1用户面的目标TNL地址、激活成功的通过TNL隧道传输的下行F1控制面的目标TNL地址、激活成功的通过TNL隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址。
在一些实施例中，接收部1901还接收第一宿主集中单元发送的TNL隧道传输更新或释放请求，TNL隧道传输更新或释放请求包括第二宿主分布单元的TNL隧道的端点TNL地址；其中，TNL隧道传输建立请求用于请求第一宿主分布单元去激活下行数据的TNL隧道传输或释放TNL隧道；
其中，TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过TNL隧道传输的下行F1用户面的目标TNL地址、需要去激活通过TNL隧道传输的下行F1控制面的目标TNL地址、需要去激活通过TNL隧道传输的下行非F1数据的目标TNL地址。
在一些实施例中，发送部1903还向第一宿主集中单元发送TNL隧道传输更新或释放响应，TNL隧道传输更新或释放响应包括第一宿主分布单元的TNL隧道的端点TNL地址；
其中，TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过TNL隧道传输的下行F1用户面的目标TNL地址、去激活成功的通过TNL隧道传输的下行F1控制面的目标TNL地址、去激活成功的通过TNL隧道传输的下行非F1数据的目标TNL地址、去激活失败的目标TNL地址。
在一些实施例中，IAB节点进行跨宿主集中单元的多路径分发，第一宿主分布单元属于第一宿主集中单元，第二宿主分布单元属于第二宿主集中单元。
在一些实施例中，接收部1901还接收第一宿主集中单元发送的TNL隧道传输建立请求，TNL隧道传输建立请求包括第二宿主分布单元的TNL隧道的端点TNL地址；TNL隧道传输建立请求用于请求第一宿主分布单元建立TNL隧道或者激活下行数据的TNL隧道传输；
其中，TNL隧道传输建立请求还包括如下至少之一：需要激活通过TNL隧道传输的下行F1用户面的目标TNL地址、需要激活通过TNL隧道传输的下行F1控制面的目标TNL地址、需要激活通过TNL隧道传输的下行非F1数据的目标TNL地址、需要激活通过TNL隧道传输的下行F1用户面的GTP TEID。
在一些实施例中，发送部1903还向第一宿主集中单元发送TNL隧道传输建立响应，TNL隧道传输建立响应包括第一宿主分布单元的TNL隧道的端点TNL地址；
其中，TNL隧道传输建立响应还包括如下至少之一：激活成功的通过TNL隧道传输的下行F1用户面的目标TNL地址、激活成功的通过TNL隧道传输的下行F1控制面的目标TNL地址、激活成功的通过TNL隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址。
在一些实施例中，接收部1901还接收第一宿主集中单元发送的TNL隧道传输更新或释放请求，TNL隧道传输更新或释放请求包括第二宿主分布单元的TNL隧道的端点TNL地址；其中，TNL隧道传输更新或释放请求用于请求第一宿主分布单元去激活下行数据的TNL传输或者释放TNL隧道；
其中，TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过TNL隧道传输的下行F1用户面的目标TNL地址、需要去激活通过TNL隧道传输的下行F1控制面的目标TNL地址、需要去激活通过TNL隧道传输的下行非F1数据的目标 TNL地址、需要去激活通过TNL隧道传输的下行F1用户面的GTP TEID。
在一些实施例中，发送部1903还向第一宿主集中单元发送TNL隧道传输更新或释放响应，TNL隧道传输更新或释放响应包括第一宿主分布单元的TNL隧道的端点TNL地址；
其中，TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过TNL隧道传输的下行F1用户面的目标TNL地址、去激活成功的通过TNL隧道传输的下行F1控制面的目标TNL地址、去激活成功的通过TNL隧道传输的下行非F1数据的目标TNL地址、去激活失败的目标TNL地址。
值得注意的是，以上仅对与本申请相关的各部件或模块进行了说明，但本申请不限于此。本申请实施例的IAB通信装置1900还可以包括其它部件或者模块，关于这些部件或者模块的具体内容，可以参考相关技术。
此外，为了简单起见，图19中仅示例性示出了各个部件或模块之间的连接关系或信号走向，但是本领域技术人员应该清楚的是，可以采用总线连接等各种相关技术。上述各个部件或模块可以通过例如处理器、存储器、发射机、接收机等硬件设施来实现；本申请实施并不对此进行限制。
由此，第二宿主分布单元(目标donor-DU)为上行数据添加隧道相关的报头，以及通过TNL隧道向第一宿主分布单元(原donor-DU)发送上行数据；和/或，第一宿主分布单元(原donor-DU)为下行数据添加隧道相关的报头，以及通过TNL隧道向第二宿主分布单元(目标donor-DU)发送下行数据。由此，在IAB-node迁移的原donor-DU和目标donor-DU之间建立TNL隧道，能够解决上行数据或下行数据被丢弃的问题。
第五方面的实施例
本申请实施例提供了一种通信系统，包括宿主(Donor)设备和IAB节点(IAB-node)；关于宿主(Donor)设备、IAB节点的网络架构还可以参考相关技术，此处省略说明。
本申请实施例还提供一种Donor设备。
图20是本申请实施例的Donor设备的示意图。如图20所示，Donor设备2000可以包括：处理器(例如中央处理器CPU)2001和存储器2002；存储器2002耦合到处理器2001。其中该存储器2002可存储各种数据；此外还存储信息处理的程序2005， 并且在中央处理器2001的控制下执行该程序2005。
例如，处理器2001可以被配置为执行程序而实现如第一方面的实施例中的IAB通信方法。例如，处理器2001可以被配置为进行如下的控制：接收由IAB节点发送的上行数据；为上行数据添加TNL隧道相关的报头；以及通过传输网络层(TNL)隧道向第一宿主分布单元发送上行数据。
再例如，处理器2001可以被配置为执行程序而实现如第二方面的实施例中的IAB通信方法。例如，处理器2001可以被配置为进行如下的控制：接收向IAB节点发送的下行数据；为下行数据添加TNL隧道相关的报头；以及通过传输网络层(TNL)隧道向第二宿主分布单元发送下行数据。
再例如，处理器2001可以被配置为执行程序而实现如第三方面的实施例中的IAB通信方法。例如，处理器2001可以被配置为进行如下的控制：指示第二宿主分布单元接收由IAB节点发送的上行数据，并通过第二宿主分布单元与第一宿主分布单元之间的传输网络层(TNL)隧道向第一宿主分布单元发送上行数据。
或者，处理器2001可以被配置为进行如下的控制：指示第一宿主分布单元接收向IAB节点发送的下行数据，并通过第一宿主分布单元与第二宿主分布单元之间的传输网络层(TNL)隧道向第二宿主分布单元发送下行数据。
此外，如图20所示，Donor设备2000还可以包括：收发机2003和天线2004等；其中，上述部件的功能与现有技术类似，此处不再赘述。值得注意的是，Donor设备2000也并不是必须要包括图20中所示的所有部件；此外，Donor设备2000还可以包括图20中没有示出的部件，可以参考现有技术。
本申请实施例还提供一种计算机可读程序，其中当在Donor设备中执行所述程序时，所述程序使得计算机在所述Donor设备中执行第一至第三方面的实施例中的IAB通信方法。
本申请实施例还提供一种存储有计算机可读程序的存储介质，其中所述计算机可读程序使得计算机在Donor设备中执行第一至第三方面的实施例中的IAB通信方法。
本申请以上的装置和方法可以由硬件实现，也可以由硬件结合软件实现。本申请涉及这样的计算机可读程序，当该程序被逻辑部件所执行时，能够使该逻辑部件实现上文所述的装置或构成部件，或使该逻辑部件实现上文所述的各种方法或步骤。逻辑部件例如现场可编程逻辑部件、微处理器、计算机中使用的处理器等。本申请还涉及用于存储以上程序的存储介质，如硬盘、磁盘、光盘、DVD、flash存储器等。
结合本申请实施例描述的方法/装置可直接体现为硬件、由处理器执行的软件模块或二者组合。例如，图中所示的功能框图中的一个或多个和/或功能框图的一个或多个组合，既可以对应于计算机程序流程的各个软件模块，亦可以对应于各个硬件模块。这些软件模块，可以分别对应于图中所示的各个步骤。这些硬件模块例如可利用现场可编程门阵列(FPGA)将这些软件模块固化而实现。
软件模块可以位于RAM存储器、闪存、ROM存储器、EPROM存储器、EEPROM存储器、寄存器、硬盘、移动磁盘、CD-ROM或者本领域已知的任何其它形式的存储介质。可以将一种存储介质耦接至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息；或者该存储介质可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。该软件模块可以存储在移动终端的存储器中，也可以存储在可插入移动终端的存储卡中。例如，若设备(如移动终端)采用的是较大容量的MEGA-SIM卡或者大容量的闪存装置，则该软件模块可存储在该MEGA-SIM卡或者大容量的闪存装置中。
针对附图中描述的功能方框中的一个或多个和/或功能方框的一个或多个组合，可以实现为用于执行本申请所描述功能的通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其它可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件或者其任意适当组合。针对附图描述的功能方框中的一个或多个和/或功能方框的一个或多个组合，还可以实现为计算设备的组合，例如，DSP和微处理器的组合、多个微处理器、与DSP通信结合的一个或多个微处理器或者任何其它这种配置。
以上结合具体的实施方式对本申请进行了描述，但本领域技术人员应该清楚，这些描述都是示例性的，并不是对本申请保护范围的限制。本领域技术人员可以根据本申请的精神和原理对本申请做出各种变型和修改，这些变型和修改也在本申请的范围内。
关于本实施例公开的上述实施方式，还公开了如下的附记：
1.一种集成的接入和回传(IAB)的通信方法，其中IAB节点从第一宿主分布单元(donor-DU)迁移到第二宿主分布单元，并且所述第一宿主分布单元和所述第二宿主分布单元之间建立传输网络层(TNL)隧道；所述方法包括：
所述第二宿主分布单元接收由所述IAB节点发送的上行数据；
所述第二宿主分布单元为所述上行数据添加所述隧道相关的报头；以及
所述第二宿主分布单元通过所述传输网络层(TNL)隧道向所述第一宿主分布单元发送所述上行数据。
2.根据附记1所述的方法，其中，所述报头包括如下至少之一：互联网协议(IP)报头、通用无线分组业务(GPRS)隧道协议(GTP)报头、用户数据报协议(UDP)报头或传输控制协议(TCP)报头。
3.根据附记1所述的方法，其中，所述报头的源传输网络层(TNL)地址为所述第二宿主分布单元的TNL地址或者能够通过所述第二宿主分布单元路由的TNL地址，所述报头的目标TNL地址为所述第一宿主分布单元的TNL地址。
4.根据附记1所述的方法，其中，所述IAB节点从所述第一宿主分布单元切换到所述第二宿主分布单元，或者，所述IAB节点到所述第一宿主分布单元的无线链路失败(RLF)后无线资源控制(RRC)重建立到所述第二宿主分布单元；其中，所述第一宿主分布单元和所述第二宿主分布单元属于同一宿主集中单元(donor-CU)。
5.根据附记4所述的方法，其中，所述方法还包括：
所述第二宿主分布单元接收所述宿主集中单元发送的TNL隧道传输建立请求，所述TNL隧道传输建立请求包括所述第一宿主分布单元的TNL隧道的端点TNL地址；其中，所述TNL隧道传输建立请求用于请求所述第二宿主分布单元建立所述TNL隧道或激活所述上行数据的TNL隧道传输。
6.根据附记5所述的方法，其中，在所述宿主集中单元接收到所述IAB节点的切换完成消息后，或者，在所述宿主集中单元接收到所述IAB节点的RRC重建立完成消息后，或者，所述宿主集中单元没有为所述IAB节点配置由所述第二宿主分布单元分配的TNL地址时，所述第二宿主分布单元接收由所述宿主集中单元发送的所述TNL隧道传输建立请求。
7.根据附记5所述的方法，其中，所述TNL隧道传输建立请求还包括如下至少之一：需要激活通过所述TNL隧道传输的上行F1用户面的源TNL地址、需要激活通过所述TNL隧道传输的上行F1控制面的源TNL地址、需要激活通过所述TNL隧道传输的上行非F1数据的源TNL地址。
8.根据附记5所述的方法，其中，所述方法还包括：
所述第二宿主分布单元向所述宿主集中单元发送TNL隧道传输建立响应，所述TNL隧道传输建立响应包括所述第二宿主分布单元的TNL隧道的端点TNL地址。
9.根据附记8所述的方法，其中，所述TNL隧道传输建立响应还包括如下至少 之一：激活成功的通过所述TNL隧道传输的上行F1用户面的源TNL地址、激活成功的通过所述TNL隧道传输的上行F1控制面的源TNL地址、激活成功的通过所述TNL隧道传输的上行非F1数据的源TNL地址、激活失败的源TNL地址。
10.根据附记4所述的方法，其中，所述第二宿主分布单元还接收所述宿主集中单元发送的业务映射信息，所述业务映射信息用于配置通过所述TNL隧道传输的下行数据的回传自适应协议(BAP)路由标识以及所述第二宿主分布单元和下一跳子节点之间的回传RLC信道。
11.根据附记4所述的方法，其中，所述方法还包括：
所述第二宿主分布单元接收所述宿主集中单元发送的TNL隧道传输更新或释放请求，所述TNL隧道传输更新或释放请求包括所述第一宿主分布单元的TNL隧道的端点TNL地址；所述TNL隧道传输更新或释放请求用于请求所述第二宿主单元去激活所述上行数据的TNL隧道传输或者释放所述TNL隧道。
12.根据附记11所述的方法，其中，在所述宿主集中单元为所述IAB节点配置由所述第二宿主分布单元分配的TNL地址后，或者，在所述IAB节点完成切换的预设时间之后，或者，在所述IAB节点完成重建立的预设时间之后，所述第二宿主分布单元接收由所述宿主集中单元发送的所述TNL隧道传输更新或释放请求。
13.根据附记11所述的方法，其中，所述TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过所述TNL隧道传输的上行F1用户面的源TNL地址、需要去激活通过所述TNL隧道传输的上行F1控制面的源TNL地址、需要去激活通过所述TNL隧道传输的上行非F1数据的源TNL地址。
14.根据附记11所述的方法，其中，所述方法还包括：
所述第二宿主分布单元向所述宿主集中单元发送TNL隧道传输更新或释放响应，所述TNL隧道传输更新或释放响应包括所述第二宿主分布单元的TNL隧道的端点TNL地址。
15.根据附记14所述的方法，其中，所述TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过所述TNL隧道传输的上行F1用户面的源TNL地址、去激活成功的通过所述TNL隧道传输的上行F1控制面的源TNL地址、去激活成功的通过所述TNL隧道传输的上行非F1数据的源TNL地址、去激活失败的源TNL地址。
16.根据附记4所述的方法，其中，所述第二宿主分布单元还接收所述宿主集中 单元发送的业务映射信息释放指示，所述业务映射信息释放指示用于释放去激活通过所述TNL隧道传输的下行数据的BAP路由标识以及所述第二宿主分布单元和下一跳子节点之间的回传RLC信道的配置。
17.根据附记1所述的方法，其中，所述IAB节点进行宿主集中单元内(intra-donor CU)的多路径分发，所述第一宿主分布单元和所述第二宿主分布单元属于同一宿主集中单元(donor-CU)。
18.根据附记17所述的方法，其中，所述方法还包括：
所述第二宿主分布单元接收所述宿主集中单元发送的TNL隧道传输建立请求，所述TNL隧道传输建立请求包括所述第一宿主分布单元的TNL隧道的端点TNL地址；其中，所述TNL隧道传输建立请求用于请求所述第二宿主分布单元建立所述TNL隧道或者激活所述上行数据的TNL隧道传输。
19.根据附记18所述的方法，其中，在所述宿主集中单元将所述IAB节点的回传自适应协议(BAP)路由配置为所述第二宿主分布单元的BAP路由标识，但并没有配置由所述第二宿主分布单元分配的TNL地址的情况下，所述第二宿主分布单元接收由所述宿主集中单元发送的所述TNL隧道传输建立请求。
20.根据附记18所述的方法，其中，所述TNL隧道传输建立请求还包括如下至少之一：需要激活通过所述TNL隧道传输的上行F1用户面的源TNL地址、需要激活通过所述TNL隧道传输的上行F1控制面的源TNL地址、需要激活通过所述TNL隧道传输的上行非F1数据的源TNL地址、需要激活通过所述TNL隧道传输的上行F1用户面的GTP隧道端点标识(TEID)。
21.根据附记18所述的方法，其中，所述方法还包括：
所述第二宿主分布单元向所述宿主集中单元发送TNL隧道传输建立响应，所述TNL隧道传输建立响应包括所述第二宿主分布单元的TNL隧道的端点TNL地址。
22.根据附记21所述的方法，其中，所述TNL隧道传输建立响应还包括如下至少之一：激活成功的通过所述TNL隧道传输的上行F1用户面的源TNL地址、激活成功的通过所述TNL隧道传输的上行F1控制面的源TNL地址、激活成功的通过所述TNL隧道传输的上行非F1数据的源TNL地址、激活失败的源TNL地址。
23.根据附记17所述的方法，其中，所述第二宿主分布单元还接收所述宿主集中单元配置的业务映射信息，所述业务映射信息用于配置通过所述TNL隧道传输的下行数据的BAP路由标识以及所述第二宿主分布单元和下一跳子节点之间的回传 RLC信道。
24.根据附记17所述的方法，其中，所述方法还包括：
所述第二宿主分布单元接收所述宿主集中单元发送的TNL隧道传输更新或释放请求，所述TNL隧道传输更新或释放请求包括所述第一宿主分布单元的TNL隧道的端点TNL地址；所述TNL隧道传输更新或释放请求用于请求所述第二宿主单元去激活所述上行数据的TNL隧道传输或者释放所述TNL隧道。
25.根据附记24所述的方法，其中，在所述宿主集中单元为所述IAB节点的配置由所述第二宿主分布单元分配的TNL地址后，所述第二宿主分布单元接收由所述宿主集中单元发送的所述TNL隧道传输更新或释放请求。
26.根据附记24所述的方法，其中，所述TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过所述TNL隧道传输的上行F1用户面的源TNL地址、需要去激活通过所述TNL隧道传输的上行F1控制面的源TNL地址、需要去激活通过所述TNL隧道传输的上行非F1数据的源TNL地址、需要去激活通过所述TNL隧道传输的上行F1用户面的GTP TEID。
27.根据附记24所述的方法，其中，所述方法还包括：
所述第二宿主分布单元向所述宿主集中单元发送TNL隧道传输更新或释放响应，所述TNL隧道传输更新或释放响应包括所述第二宿主分布单元的TNL隧道的端点TNL地址。
28.根据附记27所述的方法，其中，所述TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过所述TNL隧道传输的上行F1用户面的源TNL地址、去激活成功的通过所述TNL隧道传输的上行F1控制面的源TNL地址、去激活成功的通过所述TNL隧道传输的上行非F1数据的源TNL地址、去激活失败的源TNL地址。
29.根据附记17所述的方法，其中，所述第二宿主分布单元还接收由所述宿主集中单元发送的业务映射信息释放指示，所述业务映射信息释放指示用于释放去激活通过所述TNL隧道传输的下行数据的BAP路由标识以及所述第二宿主分布单元和下一跳子节点之间的回传RLC信道的配置。
30.根据附记1所述的方法，其中，所述IAB节点从所述第一宿主分布单元切换到所述第二宿主分布单元，或者，所述IAB节点到所述第一宿主分布单元无线链路失败(RLF)后RRC重建立到所述第二宿主分布单元，所述第一宿主分布单元属 于第一宿主集中单元，所述第二宿主分布单元属于第二宿主集中单元。
31.根据附记30所述的方法，其中，所述方法还包括：
所述第二宿主分布单元接收所述第二宿主集中单元发送的TNL隧道传输建立请求，所述TNL隧道传输建立请求包括所述第一宿主分布单元的TNL隧道的端点TNL地址；其中，所述TNL隧道传输建立请求用于请求所述第二宿主分布单元建立所述TNL隧道或激活所述上行数据的TNL隧道传输。
32.根据附记31所述的方法，其中，在所述第二宿主集中单元接收到所述IAB节点的切换完成消息后，或者，在所述第二宿主集中单元接收到所述IAB节点的RRC重建立完成消息后，或者，在所述第二宿主集中单元没有为所述IAB节点配置由所述第二宿主分布单元分配的TNL地址时，所述第二宿主分布单元接收由所述第二宿主集中单元发送的所述TNL隧道传输建立请求。
33.根据附记31所述的方法，其中，所述TNL隧道传输建立请求还包括如下至少之一：需要激活通过所述TNL隧道传输的上行F1用户面的源TNL地址、需要激活通过所述TNL隧道传输的上行F1控制面的源TNL地址、需要激活通过所述TNL隧道传输的上行非F1数据的源TNL地址。
34.根据附记31所述的方法，其中，所述方法还包括：
所述第二宿主分布单元向所述第二宿主集中单元发送TNL隧道传输建立响应，所述TNL隧道传输建立响应包括所述第二宿主分布单元的TNL隧道的端点TNL地址。
35.根据附记34所述的方法，其中，所述TNL隧道传输建立响应还包括如下至少之一：激活成功的通过所述TNL隧道传输的上行F1用户面的源TNL地址、激活成功的通过所述TNL隧道传输的上行F1控制面的源TNL地址、激活成功的通过所述TNL隧道传输的上行非F1数据的源TNL地址、激活失败的源TNL地址。
36.根据附记30所述的方法，其中，所述第二宿主分布单元还接收所述宿主集中单元发送的业务映射信息，所述业务映射信息用于配置通过所述TNL隧道传输的下行数据的BAP路由标识以及所述第二宿主分布单元和下一跳子节点之间的回传RLC信道。
37.根据附记30所述的方法，其中，所述方法还包括：
所述第二宿主分布单元接收所述第二宿主集中单元发送的TNL隧道传输更新或释放请求，所述TNL隧道传输更新或释放请求包括所述第一宿主分布单元的TNL隧 道的端点TNL地址；所述TNL隧道传输更新或释放请求用于请求所述第二宿主单元去激活所述上行数据的TNL隧道传输或者释放所述TNL隧道。
38.根据附记37所述的方法，其中，在所述第二宿主集中单元为所述IAB节点配置由所述第二宿主分布单元分配的TNL地址后，或者，在所述IAB节点完成切换的预设时间之后，或者，在所述IAB节点完成重建立的预设时间之后，所述第二宿主分布单元接收由所述第二宿主集中单元发送的所述TNL隧道传输更新或释放请求。
39.根据附记37所述的方法，其中，所述TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过所述TNL隧道传输的上行F1用户面的源TNL地址、需要去激活通过所述TNL隧道传输的上行F1控制面的源TNL地址、需要去激活通过所述TNL隧道传输的上行非F1数据的源TNL地址。
40.根据附记37所述的方法，其中，所述方法还包括：
所述第二宿主分布单元向所述第二宿主集中单元发送TNL隧道传输更新或释放响应，所述TNL隧道传输更新或释放响应包括所述第二宿主分布单元的TNL隧道的端点TNL地址。
41.根据附记40所述的方法，其中，所述TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过所述TNL隧道传输的上行F1用户面的源TNL地址、去激活成功的通过所述TNL隧道传输的上行F1控制面的源TNL地址、去激活成功的通过所述TNL隧道传输的上行非F1数据的源TNL地址、去激活失败的源TNL地址。
42.根据附记30所述的方法，其中，所述第二宿主分布单元还接收由所述宿主集中单元发送的业务映射信息释放指示，所述业务映射信息释放指示用于释放去激活通过所述TNL隧道传输的下行数据的BAP路由标识以及所述第二宿主分布单元和下一跳子节点之间的回传RLC信道的配置。
43.根据附记1所述的方法，其中，所述IAB节点进行跨宿主集中单元(inter-donor CU)的多路径分发，所述第一宿主分布单元属于第一宿主集中单元，所述第二宿主分布单元属于第二宿主集中单元。
44.根据附记43所述的方法，其中，所述方法还包括：
所述第二宿主分布单元接收所述第二宿主集中单元发送的TNL隧道传输建立请求，所述TNL隧道传输建立请求包括所述第一宿主分布单元的TNL隧道的端点TNL地址；其中，所述TNL隧道传输建立请求用于请求所述第二宿主分布单元建立所述 TNL隧道或者激活所述上行数据的TNL隧道传输。
45.根据附记44所述的方法，其中，在所述第二宿主集中单元将所述IAB节点的回传自适应协议(BAP)路由配置为所述第二宿主分布单元的BAP路由标识，但并没有配置由所述第二宿主分布单元分配的TNL地址的情况下，所述第二宿主分布单元接收由所述第二宿主集中单元发送的所述TNL隧道传输建立请求。
46.根据附记44所述的方法，其中，所述TNL隧道传输建立请求还包括如下至少之一：需要激活通过所述TNL隧道传输的上行F1用户面的源TNL地址、需要激活通过所述TNL隧道传输的上行F1控制面的源TNL地址、需要激活通过所述TNL隧道传输的上行非F1数据的源TNL地址、需要激活通过所述TNL隧道传输的上行F1用户面的GTP TEID。
47.根据附记44所述的方法，其中，所述方法还包括：
所述第二宿主分布单元向所述第二宿主集中单元发送TNL隧道传输建立响应，所述TNL隧道传输建立响应包括所述第二宿主分布单元的TNL隧道的端点TNL地址。
48.根据附记47所述的方法，其中，所述TNL隧道传输建立响应还包括如下至少之一：激活成功的通过所述TNL隧道传输的上行F1用户面的源TNL地址、激活成功的通过所述TNL隧道传输的上行F1控制面的源TNL地址、激活成功的通过所述TNL隧道传输的上行非F1数据的源TNL地址、激活失败的源TNL地址。
49.根据附记43所述的方法，其中，所述第二宿主分布单元还接收所述宿主集中单元发送的业务映射信息，所述业务映射信息用于配置通过所述TNL隧道传输的下行数据的BAP路由标识以及所述第二宿主分布单元和下一跳子节点之间的回传RLC信道。
50.根据附记43所述的方法，其中，所述方法还包括：
所述第二宿主分布单元接收所述第二宿主集中单元发送的TNL隧道传输更新或释放请求，所述TNL隧道传输更新或释放请求包括所述第一宿主分布单元的TNL隧道的端点TNL地址；所述TNL隧道传输更新或释放请求用于请求所述第二宿主单元去激活所述上行数据的TNL隧道传输或者释放所述TNL隧道。
51.根据附记50所述的方法，其中，在所述第二宿主集中单元为所述IAB节点配置由所述第二宿主分布单元分配的TNL地址后，所述第二宿主分布单元接收由所述第二宿主集中单元发送的所述TNL隧道传输更新或释放请求。
52.根据附记50所述的方法，其中，所述TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过所述TNL隧道传输的上行F1用户面的源TNL地址、需要去激活通过所述TNL隧道传输的上行F1控制面的源TNL地址、需要去激活通过所述TNL隧道传输的上行非F1数据的源TNL地址、需要去激活通过所述TNL隧道传输的上行F1用户面的GTP TEID。
53.根据附记50所述的方法，其中，所述方法还包括：
所述第二宿主分布单元向所述第二宿主集中单元发送TNL隧道传输更新或释放响应，所述TNL隧道传输更新或释放响应包括所述第二宿主分布单元的TNL隧道的端点TNL地址。
54.根据附记53所述的方法，其中，所述TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过所述TNL隧道传输的上行F1用户面的源TNL地址、去激活成功的通过所述TNL隧道传输的上行F1控制面的源TNL地址、去激活成功的通过所述TNL隧道传输的上行非F1数据的源TNL地址、去激活失败的源TNL地址。
55.根据附记43所述的方法，其中，所述第二宿主分布单元还接收由所述宿主集中单元发送的业务映射信息释放指示，所述业务映射信息释放指示用于释放去激活通过所述TNL隧道传输的下行数据的BAP路由标识以及所述第二宿主分布单元和下一跳子节点之间的回传RLC信道的配置。
56.一种集成的接入和回传(IAB)的通信方法，其中IAB节点从第一宿主分布单元迁移到第二宿主分布单元，并且所述第一宿主分布单元和所述第二宿主分布单元建立传输网络层(TNL)隧道；所述方法包括：
所述第一宿主分布单元接收向所述IAB节点发送的下行数据；
所述第一宿主分布单元为所述下行数据添加所述TNL隧道相关的报头；以及
所述第一宿主分布单元通过所述传输网络层(TNL)隧道向所述第二宿主分布单元发送所述下行数据。
57.根据附记56所述的方法，其中，所述报头包括如下至少之一：互联网协议(IP)报头、通用无线分组业务(GPRS)隧道协议(GTP)报头、用户数据报协议(UDP)报头或传输控制协议(TCP)报头。
58.根据附记56所述的方法，其中，所述报头的源传输网络层(TNL)地址为所述第一宿主分布单元的传输网络层(TNL)地址或能够通过所述第一宿主分布单元 路由的TNL地址，所述报头的目标传输网络层(TNL)地址为所述第二宿主分布单元的传输网络层(TNL)地址。
59.根据附记56所述的方法，其中，所述IAB节点从所述第一宿主分布单元切换到所述第二宿主分布单元，或者，所述IAB节点到所述第一宿主分布单元无线链路失败后RRC重建立到所述第二宿主分布单元；其中，所述第一宿主分布单元和所述第二宿主分布单元属于同一宿主集中单元(donor-CU)。
60.根据附记59所述的方法，其中，所述方法还包括：
所述第一宿主分布单元接收所述宿主集中单元发送的TNL隧道传输建立请求，所述TNL隧道传输建立请求包括所述第二宿主分布单元的TNL隧道的端点TNL地址；所述TNL隧道传输建立请求用于请求所述第一宿主分布单元建立所述TNL隧道或者激活所述下行数据的TNL隧道传输。
61.根据附记60所述的方法，其中，在所述宿主集中单元接收到所述IAB节点的切换完成消息，或所述宿主集中单元接收到所述IAB节点的RRC重建立完成消息后，或所述宿主集中单元没有为所述IAB节点配置由所述第二宿主分配单元分配的TNL地址时，所述第一宿主分布单元接收由所述宿主集中单元发送的所述TNL隧道传输建立请求。
62.根据附记60所述的方法，其中，所述TNL隧道传输建立请求还包括如下至少之一：需要激活通过所述TNL隧道传输的下行F1用户面的目标TNL地址、需要激活通过所述TNL隧道传输的下行F1控制面的目标TNL地址、需要激活通过所述TNL隧道传输的下行非F1数据的目标TNL地址。
63.根据附记60所述的方法，其中，所述方法还包括：
所述第一宿主分布单元向所述宿主集中单元发送TNL隧道传输建立响应，所述TNL隧道传输建立响应包括所述第一宿主分布单元的TNL隧道的端点TNL地址。
64.根据附记63所述的方法，其中，所述TNL隧道传输建立响应还包括如下至少之一：激活成功的通过所述TNL隧道传输的下行F1用户面的目标TNL地址、激活成功的通过所述TNL隧道传输的下行F1控制面的目标TNL地址、激活成功的通过所述TNL隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址。
65.根据附记60所述的方法，其中，所述方法还包括：
所述第一宿主分布单元接收所述宿主集中单元发送的TNL隧道传输更新或释放请求，所述TNL隧道传输更新或释放请求包括所述第二宿主分布单元的TNL隧道的 端点TNL地址；其中，所述TNL隧道传输更新或释放请求用于请求所述第一宿主分布单元去激活所述下行数据的TNL隧道传输或者释放所述TNL隧道。
66.根据附记65所述的方法，其中，在所述宿主集中单元为所述IAB节点配置由所述第二宿主分布单元分配的TNL地址后，或者，在所述IAB节点完成切换的预设时间之后，或者，在所述IAB节点完成重建立的预设时间之后，所述第一宿主分布单元接收由所述宿主集中单元发送的所述TNL隧道传输更新或释放请求。
67.根据附记65所述的方法，其中，所述TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活的通过所述TNL隧道传输的下行F1用户面的目标TNL地址、需要去激活的通过所述TNL隧道传输的下行F1控制面的目标TNL地址、需要去激活的通过所述TNL隧道传输的下行非F1数据的目标TNL地址。
68.根据附记65所述的方法，其中，所述方法还包括：
所述第一宿主分布单元向所述宿主集中单元发送TNL隧道传输更新或释放响应，所述TNL隧道传输更新或释放响应包括所述第一宿主分布单元的TNL隧道的端点TNL地址。
69.根据附记68所述的方法，其中，所述TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过所述TNL隧道传输的下行F1用户面的目标TNL地址、去激活成功的通过所述TNL隧道传输的下行F1控制面的目标TNL地址、去激活成功的通过所述TNL隧道传输的下行非F1数据的目标TNL地址、去激活失败的目标TNL地址。
70.根据附记56所述的方法，其中，所述IAB节点进行宿主集中单元内(intra-donor CU)的多路径分发，所述第一宿主分布单元和所述第二宿主分布单元属于同一宿主集中单元(donor-CU)。
71.根据附记70所述的方法，其中，所述方法还包括：
所述第一宿主分布单元接收所述宿主集中单元发送的TNL隧道传输建立请求，所述TNL隧道传输建立请求包括所述第二宿主分布单元的TNL隧道的端点TNL地址；所述TNL隧道传输建立请求用于请求所述第一宿主分布单元建立所述TNL隧道或者激活所述下行数据的TNL隧道传输。
72.根据附记71所述的方法，其中，在所述宿主集中单元将所述IAB节点的回传自适应协议(BAP)路由配置为所述第二宿主分布单元的BAP路由标识，但并没有配置由所述第二宿主分布单元分配的TNL地址的情况下，所述第一宿主分布单元 接收由所述宿主集中单元发送的所述TNL隧道传输建立请求。
73.根据附记71所述的方法，其中，所述TNL隧道传输建立请求还包括如下至少之一：需要激活通过所述TNL隧道传输的下行F1用户面的目标TNL地址、需要激活通过所述TNL隧道传输的下行F1控制面的目标TNL地址、需要激活所述TNL通过隧道传输的下行非F1数据的目标TNL地址、需要激活通过所述TNL隧道传输的下行F1用户面的GTP TEID。
74.根据附记71所述的方法，其中，所述方法还包括：
所述第一宿主分布单元向所述宿主集中单元发送TNL隧道传输建立响应，所述TNL隧道传输建立响应包括所述第一宿主分布单元的TNL隧道的端点TNL地址。
75.根据附记74所述的方法，其中，所述TNL隧道传输建立响应还包括如下至少之一：激活成功的通过所述TNL隧道传输的下行F1用户面的目标TNL地址、激活成功的通过所述TNL隧道传输的下行F1控制面的目标TNL地址、激活成功的通过所述TNL隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址。
76.根据附记70所述的方法，其中，所述方法还包括：
所述第一宿主分布单元接收所述宿主集中单元发送的TNL隧道传输更新或释放请求，所述TNL隧道传输更新或释放请求包括所述第二宿主分布单元的TNL隧道的端点TNL地址；其中，所述TNL隧道传输更新或释放请求用于请求所述第一宿主分布单元去激活所述下行数据的TNL传输或者释放所述TNL隧道。
77.根据附记76所述的方法，其中，在所述宿主集中单元为所述IAB节点配置由所述第二宿主分布单元分配的TNL地址后，所述第一宿主分布单元接收由所述宿主集中单元发送的所述TNL隧道传输更新或释放请求。
78.根据附记76所述的方法，其中，所述TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过所述TNL隧道传输的下行F1用户面的目标TNL地址、需要去激活通过所述TNL隧道传输的下行F1控制面的目标TNL地址、需要去激活通过所述TNL隧道传输的下行非F1数据的目标TNL地址、需要去激活通过所述TNL隧道传输的下行F1用户面的GTP TEID。
79.根据附记76所述的方法，其中，所述方法还包括：
所述第一宿主分布单元向所述宿主集中单元发送TNL隧道传输更新或释放响应，所述TNL隧道传输更新或释放响应包括所述第一宿主分布单元的TNL隧道的端点TNL地址。
80.根据附记79所述的方法，其中，所述TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过所述TNL隧道传输的下行F1用户面的目标TNL地址、去激活成功的通过所述TNL隧道传输的下行F1控制面的目标TNL地址、去激活成功的通过所述TNL隧道传输的下行非F1数据的目标TNL地址、去激活失败的目标TNL地址。
81.根据附记56所述的方法，其中，所述IAB节点从所述第一宿主分布单元切换到所述第二宿主分布单元，或者，所述IAB节点到所述第一宿主分布单元无线链路失败(RLF)后RRC重建立到所述第二宿主分布单元，所述第一宿主分布单元属于第一宿主集中单元，所述第二宿主分布单元属于第二宿主集中单元。
82.根据附记81所述的方法，其中，所述方法还包括：
所述第一宿主分布单元接收所述第一宿主集中单元发送的TNL隧道传输建立请求，所述TNL隧道传输建立请求包括所述第二宿主分布单元的TNL隧道的端点TNL地址；所述TNL隧道传输建立请求用于请求所述第一宿主分布单元建立所述TNL隧道或者激活所述下行数据的TNL隧道传输。
83.根据附记82所述的方法，其中，在所述第二宿主集中单元接收到所述IAB节点的切换完成消息，或所述第二宿主集中单元接收到所述IAB节点的RRC重建立完成消息后，或所述第二宿主集中单元没有为所述IAB节点配置由所述第二宿主分配单元分配的TNL地址时，所述第一宿主分布单元接收由所述第一宿主集中单元发送的所述TNL隧道传输建立请求。
84.根据附记82所述的方法，其中，所述TNL隧道传输建立请求还包括如下至少之一：需要激活通过所述TNL隧道传输的下行F1用户面的目标TNL地址、需要激活通过所述TNL隧道传输的下行F1控制面的目标TNL地址、需要激活通过所述TNL隧道传输的下行非F1数据的目标TNL地址。
85.根据附记82所述的方法，其中，所述方法还包括：
所述第一宿主分布单元向所述第一宿主集中单元发送TNL隧道传输建立响应，所述TNL隧道传输建立响应包括所述第一宿主分布单元的TNL隧道的端点TNL地址。
86.根据附记85所述的方法，其中，所述TNL隧道传输建立响应还包括如下至少之一：激活成功的通过所述TNL隧道传输的下行F1用户面的目标TNL地址、激活成功的通过所述TNL隧道传输的下行F1控制面的目标TNL地址、激活成功的通 过所述TNL隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址。
87.根据附记81所述的方法，其中，所述方法还包括：
所述第一宿主分布单元接收所述第一宿主集中单元发送的TNL隧道传输更新或释放请求，所述TNL隧道传输更新或释放请求包括所述第二宿主分布单元的TNL隧道的端点TNL地址；其中，所述TNL隧道传输建立请求用于请求所述第一宿主分布单元去激活所述下行数据的TNL隧道传输或释放所述TNL隧道。
88.根据附记87所述的方法，其中，在所述第二宿主集中单元为所述IAB节点配置由所述第二宿主分布单元分配的TNL地址后，或者，在所述IAB节点完成切换的预设时间之后，或者，在所述IAB节点完成重建立的预设时间之后，所述第一宿主分布单元接收由所述第一宿主集中单元发送的所述TNL隧道传输更新或释放请求。
89.根据附记87所述的方法，其中，所述TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过所述TNL隧道传输的下行F1用户面的目标TNL地址、需要去激活通过所述TNL隧道传输的下行F1控制面的目标TNL地址、需要去激活通过所述TNL隧道传输的下行非F1数据的目标TNL地址。
90.根据附记87所述的方法，其中，所述方法还包括：
所述第一宿主分布单元向所述第一宿主集中单元发送TNL隧道传输更新或释放响应，所述TNL隧道传输更新或释放响应包括所述第一宿主分布单元的TNL隧道的端点TNL地址。
91.根据附记90所述的方法，其中，所述TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过所述TNL隧道传输的下行F1用户面的目标TNL地址、去激活成功的通过所述TNL隧道传输的下行F1控制面的目标TNL地址、去激活成功的通过所述TNL隧道传输的下行非F1数据的目标TNL地址、去激活失败的目标TNL地址。
92.根据附记47所述的方法，其中，所述IAB节点进行跨宿主集中单元(inter-donor CU)的多路径分发，所述第一宿主分布单元属于第一宿主集中单元，所述第二宿主分布单元属于第二宿主集中单元。
93.根据附记92所述的方法，其中，所述方法还包括：
所述第一宿主分布单元接收所述第一宿主集中单元发送的TNL隧道传输建立请求，所述TNL隧道传输建立请求包括所述第二宿主分布单元的TNL隧道的端点TNL地址；所述TNL隧道传输建立请求用于请求所述第一宿主分布单元建立所述TNL隧 道或者激活所述下行数据的TNL隧道传输。
94.根据附记93所述的方法，其中，在所述第二宿主集中单元将所述IAB节点的回传自适应协议(BAP)路由配置为所述第二宿主分布单元的BAP路由标识，但并没有为所述下行数据配置由所述第二宿主分布单元分配的TNL地址的情况下，所述第一宿主分布单元接收由所述第一宿主集中单元发送的所述TNL隧道传输建立请求。
95.根据附记93所述的方法，其中，所述TNL隧道传输建立请求还包括如下至少之一：需要激活通过所述TNL隧道传输的下行F1用户面的目标TNL地址、需要激活通过所述TNL隧道传输的下行F1控制面的目标TNL地址、需要激活通过所述TNL隧道传输的下行非F1数据的目标TNL地址、需要激活通过所述TNL隧道传输的下行F1用户面的GTP TEID。
96.根据附记93所述的方法，其中，所述方法还包括：
所述第一宿主分布单元向所述第一宿主集中单元发送TNL隧道传输建立响应，所述TNL隧道传输建立响应包括所述第一宿主分布单元的TNL隧道的端点TNL地址。
97.根据附记96所述的方法，其中，所述TNL隧道传输建立响应还包括如下至少之一：激活成功的通过所述TNL隧道传输的下行F1用户面的目标TNL地址、激活成功的通过所述TNL隧道传输的下行F1控制面的目标TNL地址、激活成功的通过所述TNL隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址。
98.根据附记92所述的方法，其中，所述方法还包括：
所述第一宿主分布单元接收所述第一宿主集中单元发送的TNL隧道传输更新或释放请求，所述TNL隧道传输更新或释放请求包括所述第二宿主分布单元的TNL隧道的端点TNL地址；其中，所述TNL隧道传输更新或释放请求用于请求所述第一宿主分布单元去激活所述下行数据的TNL传输或者释放所述TNL隧道。
99.根据附记98所述的方法，其中，在所述第二宿主集中单元为所述IAB节点配置由所述第二宿主分布单元分配的TNL地址后，所述第一宿主分布单元接收由所述第一宿主集中单元发送的所述TNL隧道传输更新或释放请求。
100.根据附记98所述的方法，其中，所述TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过所述TNL隧道传输的下行F1用户面的目标TNL地址、需要去激活通过所述TNL隧道传输的下行F1控制面的目标TNL地址、需要 去激活通过所述TNL隧道传输的下行非F1数据的目标TNL地址、需要去激活通过所述TNL隧道传输的下行F1用户面的GTP TEID。
101.根据附记98所述的方法，其中，所述方法还包括：
所述第一宿主分布单元向所述第一宿主集中单元发送TNL隧道传输更新或释放响应，所述TNL隧道传输更新或释放响应包括所述第一宿主分布单元的TNL隧道的端点TNL地址。
102.根据附记101所述的方法，其中，所述TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过所述TNL隧道传输的下行F1用户面的目标TNL地址、去激活成功的通过所述TNL隧道传输的下行F1控制面的目标TNL地址、去激活成功的通过所述TNL隧道传输的下行非F1数据的目标TNL地址、去激活失败的目标TNL地址。
103.一种集成的接入和回传(IAB)的通信方法，其中IAB节点从第一宿主分布单元迁移到第二宿主分布单元；所述方法包括：
第二宿主集中单元指示所述第二宿主分布单元接收由所述IAB节点发送的上行数据，并通过所述第二宿主分布单元与所述第一宿主分布单元之间的传输网络层(TNL)隧道向所述第一宿主分布单元发送所述上行数据；
其中，所述第一宿主分布单元属于第一宿主集中单元，所述第二宿主分布单元属于所述第二宿主集中单元。
104.根据附记103所述的方法，其中，所述方法还包括：
所述第二宿主集中单元向所述第二宿主分布单元发送TNL隧道传输建立请求，所述TNL隧道传输建立请求包括所述第一宿主分布单元的TNL隧道端点TNL地址；其中，所述TNL隧道传输建立请求用于请求所述第二宿主分布单元建立所述TNL隧道或激活所述上行数据的TNL隧道传输。
105.根据附记104所述的方法，其中，所述第一宿主分布单元的TNL隧道端点TNL地址由所述第一宿主集中单元发送给所述第二宿主集中单元。
106.根据附记103所述的方法，其中，当至少出现以下情况之一时，所述第二宿主集中单元向所述第二宿主分布单元发送所述TNL隧道传输建立请求：
所述第二宿主集中单元收到所述IAB节点的切换完成消息后，
所述第二宿主集中单元收到所述IAB节点的RRC重建立完成消息后，
所述第二宿主集中单元没有为所述IAB节点配置由所述第二宿主分布单元分配 的TNL地址。
107.根据附记104所述的方法，其中，所述方法还包括：
所述第二宿主集中单元还接收所述第一宿主集中单元发送的由所述第一宿主分布单元为所述IAB节点分配的TNL地址，以便所述第二宿主集中单元向所述第二宿主分布单元发送TNL隧道传输建立请求。
108.一种集成的接入和回传(IAB)的通信方法，其中IAB节点从第一宿主分布单元迁移到第二宿主分布单元；所述方法包括：
第一宿主集中单元指示所述第一宿主分布单元接收向所述IAB节点发送的下行数据，并通过所述第一宿主分布单元与所述第二宿主分布单元之间的传输网络层(TNL)隧道向所述第二宿主分布单元发送所述下行数据；
其中，所述第一宿主分布单元属于所述第一宿主集中单元，所述第二宿主分布单元属于第二宿主集中单元。
109.根据附记108所述的方法，其中，所述方法还包括：
所述第一宿主集中单元还向所述第一宿主分布单元发送TNL隧道传输更新或释放请求，所述TNL隧道传输更新或释放请求包括所述第二宿主分布单元的TNL隧道端点TNL地址；其中，所述TNL隧道传输更新或释放请求用于请求所述第一宿主分布单元去激活所述下行数据的TNL隧道传输或释放所述TNL隧道。
110.根据附记109所述的方法，其中，所述第二宿主分布单元的TNL隧道端点TNL地址由所述第二宿主集中单元发送给所述第一宿主集中单元。
111.根据附记109所述的方法，其中，在所述第二宿主集中单元为所述IAB节点配置由所述第二宿主分布单元分配的TNL地址后，所述第一宿主集中单元向所述第一宿主分布单元发送所述TNL隧道传输更新或释放请求。
112.根据附记109所述的方法，其中，所述第二宿主集中单元还向所述第一宿主集中单元发送由所述第二宿主分布单元为所述IAB节点分配的TNL地址，以触发所述第一宿主集中单元向所述第一宿主分布单元发送所述TNL隧道传输更新或释放请求。
113.一种集成的接入和回传(IAB)的通信方法，其中IAB节点从第一宿主分布单元迁移到第二宿主分布单元；所述方法包括：
宿主集中单元指示所述第二宿主分布单元接收由所述IAB节点发送的上行数据，并通过所述第二宿主分布单元与所述第一宿主分布单元之间的传输网络层(TNL)隧 道向所述第一宿主分布单元发送所述上行数据；
其中，所述第一宿主分布单元和所述第二宿主分布单元属于所述宿主集中单元。
114.一种集成的接入和回传(IAB)的通信方法，其中IAB节点从第一宿主分布单元迁移到第二宿主分布单元；所述方法包括：
宿主集中单元指示所述第一宿主分布单元接收向所述IAB节点发送的下行数据，并通过所述第一宿主分布单元与所述第二宿主分布单元之间的传输网络层(TNL)隧道向所述第二宿主分布单元发送所述下行数据；
其中，所述第一宿主分布单元和所述第二宿主分布单元属于所述宿主集中单元。
115.一种宿主(Donor)设备，包括存储器和处理器，所述存储器存储有计算机程序，其中，所述处理器被配置为执行所述计算机程序而实现如附记1至114任一项所述的IAB通信方法。
116.一种通信系统，包括宿主(Donor)设备和IAB节点(IAB-node)；其中，所述宿主(Donor)设备被配置为执行附记1至114任一项所述的IAB通信方法。

Claims (20)

  1. 一种集成的接入和回传IAB的通信装置，包括：
    接收部，其接收由IAB节点发送的上行数据；
    处理部，其为所述上行数据添加传输网络层TNL隧道相关的报头；以及
    发送部，其通过所述传输网络层隧道向第一宿主分布单元发送所述上行数据。
  2. 根据权利要求1所述的装置，其中，所述报头包括如下至少之一：互联网协议报头、通用无线分组业务隧道协议报头、用户数据报协议报头或传输控制协议报头；
    所述报头的源传输网络层地址为第二宿主分布单元的TNL地址或者能够通过所述第二宿主分布单元路由的TNL地址，所述报头的目标TNL地址为所述第一宿主分布单元的TNL地址。
  3. 根据权利要求1所述的装置，其中，所述IAB节点从所述第一宿主分布单元切换到第二宿主分布单元，或者，所述IAB节点到所述第一宿主分布单元的无线链路失败后无线资源控制重建立到所述第二宿主分布单元；其中，所述第一宿主分布单元和所述第二宿主分布单元属于同一宿主集中单元。
  4. 根据权利要求3所述的装置，其中，
    所述接收部还接收所述宿主集中单元发送的TNL隧道传输建立请求，所述TNL隧道传输建立请求包括所述第一宿主分布单元的TNL隧道的端点TNL地址；其中，所述TNL隧道传输建立请求用于请求所述第二宿主分布单元建立所述TNL隧道或激活所述上行数据的TNL隧道传输；
    其中，所述TNL隧道传输建立请求还包括如下至少之一：需要激活通过所述TNL隧道传输的上行F1用户面的源TNL地址、需要激活通过所述TNL隧道传输的上行F1控制面的源TNL地址、需要激活通过所述TNL隧道传输的上行非F1数据的源TNL地址；
    所述发送部还向所述宿主集中单元发送TNL隧道传输建立响应，所述TNL隧道传输建立响应包括所述第二宿主分布单元的TNL隧道的端点TNL地址；
    其中，所述TNL隧道传输建立响应还包括如下至少之一：激活成功的通过所述TNL隧道传输的上行F1用户面的源TNL地址、激活成功的通过所述TNL隧道传输的上行F1控制面的源TNL地址、激活成功的通过所述TNL隧道传输的上行非F1数据的源TNL地址、激活失败的源TNL地址；
    所述接收部还接收所述宿主集中单元发送的业务映射信息，所述业务映射信息用于配置通过所述TNL隧道传输的下行数据的回传自适应协议BAP路由标识以及所述第二宿主分布单元和下一跳子节点之间的回传RLC信道；
    所述接收部还接收所述宿主集中单元发送的TNL隧道传输更新或释放请求，所述TNL隧道传输更新或释放请求包括所述第一宿主分布单元的TNL隧道的端点TNL地址；所述TNL隧道传输更新或释放请求用于请求所述第二宿主单元去激活所述上行数据的TNL隧道传输或者释放所述TNL隧道；
    其中，所述TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过所述TNL隧道传输的上行F1用户面的源TNL地址、需要去激活通过所述TNL隧道传输的上行F1控制面的源TNL地址、需要去激活通过所述TNL隧道传输的上行非F1数据的源TNL地址
    所述发送部还向所述宿主集中单元发送TNL隧道传输更新或释放响应，所述TNL隧道传输更新或释放响应包括所述第二宿主分布单元的TNL隧道的端点TNL地址；
    其中，所述TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过所述TNL隧道传输的上行F1用户面的源TNL地址、去激活成功的通过所述TNL隧道传输的上行F1控制面的源TNL地址、去激活成功的通过所述TNL隧道传输的上行非F1数据的源TNL地址、去激活失败的源TNL地址；
    所述接收部还接收所述宿主集中单元发送的业务映射信息释放指示，所述业务映射信息释放指示用于释放去激活通过所述TNL隧道传输的下行数据的BAP路由标识以及所述第二宿主分布单元和下一跳子节点之间的回传RLC信道的配置。
  5. 根据权利要求1所述的装置，其中，所述IAB节点进行宿主集中单元内的多路径分发，所述第一宿主分布单元和第二宿主分布单元属于同一宿主集中单元。
  6. 根据权利要求5所述的装置，其中，
    所述接收部接收所述宿主集中单元发送的TNL隧道传输建立请求，所述TNL隧道传输建立请求包括所述第一宿主分布单元的TNL隧道的端点TNL地址；其中，所述TNL隧道传输建立请求用于请求所述第二宿主分布单元建立所述TNL隧道或者激活所述上行数据的TNL隧道传输；
    其中，所述TNL隧道传输建立请求还包括如下至少之一：需要激活通过所述TNL 隧道传输的上行F1用户面的源TNL地址、需要激活通过所述TNL隧道传输的上行F1控制面的源TNL地址、需要激活通过所述TNL隧道传输的上行非F1数据的源TNL地址、需要激活通过所述TNL隧道传输的上行F1用户面的GTP隧道端点标识；
    所述发送部还向所述宿主集中单元发送TNL隧道传输建立响应，所述TNL隧道传输建立响应包括所述第二宿主分布单元的TNL隧道的端点TNL地址；
    其中，所述TNL隧道传输建立响应还包括如下至少之一：激活成功的通过所述TNL隧道传输的上行F1用户面的源TNL地址、激活成功的通过所述TNL隧道传输的上行F1控制面的源TNL地址、激活成功的通过所述TNL隧道传输的上行非F1数据的源TNL地址、激活失败的源TNL地址；
    所述接收部还接收所述宿主集中单元配置的业务映射信息，所述业务映射信息用于配置通过所述TNL隧道传输的下行数据的BAP路由标识以及所述第二宿主分布单元和下一跳子节点之间的回传RLC信道；
    所述接收部接收所述宿主集中单元发送的TNL隧道传输更新或释放请求，所述TNL隧道传输更新或释放请求包括所述第一宿主分布单元的TNL隧道的端点TNL地址；所述TNL隧道传输更新或释放请求用于请求所述第二宿主单元去激活所述上行数据的TNL隧道传输或者释放所述TNL隧道；
    其中，所述TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过所述TNL隧道传输的上行F1用户面的源TNL地址、需要去激活通过所述TNL隧道传输的上行F1控制面的源TNL地址、需要去激活通过所述TNL隧道传输的上行非F1数据的源TNL地址、需要去激活通过所述TNL隧道传输的上行F1用户面的GTP TEID；
    所述发送部还向所述宿主集中单元发送TNL隧道传输更新或释放响应，所述TNL隧道传输更新或释放响应包括所述第二宿主分布单元的TNL隧道的端点TNL地址；
    其中，所述TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过所述TNL隧道传输的上行F1用户面的源TNL地址、去激活成功的通过所述TNL隧道传输的上行F1控制面的源TNL地址、去激活成功的通过所述TNL隧道传输的上行非F1数据的源TNL地址、去激活失败的源TNL地址；
    所述接收部还接收由所述宿主集中单元发送的业务映射信息释放指示，所述业务 映射信息释放指示用于释放去激活通过所述TNL隧道传输的下行数据的BAP路由标识以及所述第二宿主分布单元和下一跳子节点之间的回传RLC信道的配置。
  7. 根据权利要求1所述的装置，其中，所述IAB节点从所述第一宿主分布单元切换到第二宿主分布单元，或者，所述IAB节点到所述第一宿主分布单元无线链路失败后RRC重建立到所述第二宿主分布单元，所述第一宿主分布单元属于第一宿主集中单元，所述第二宿主分布单元属于第二宿主集中单元。
  8. 根据权利要求7所述的装置，其中，
    所述接收部还接收所述第二宿主集中单元发送的TNL隧道传输建立请求，所述TNL隧道传输建立请求包括所述第一宿主分布单元的TNL隧道的端点TNL地址；其中，所述TNL隧道传输建立请求用于请求所述第二宿主分布单元建立所述TNL隧道或激活所述上行数据的TNL隧道传输；
    其中，所述TNL隧道传输建立请求还包括如下至少之一：需要激活通过所述TNL隧道传输的上行F1用户面的源TNL地址、需要激活通过所述TNL隧道传输的上行F1控制面的源TNL地址、需要激活通过所述TNL隧道传输的上行非F1数据的源TNL地址；
    所述发送部还向所述第二宿主集中单元发送TNL隧道传输建立响应，所述TNL隧道传输建立响应包括所述第二宿主分布单元的TNL隧道的端点TNL地址；
    其中，所述TNL隧道传输建立响应还包括如下至少之一：激活成功的通过所述TNL隧道传输的上行F1用户面的源TNL地址、激活成功的通过所述TNL隧道传输的上行F1控制面的源TNL地址、激活成功的通过所述TNL隧道传输的上行非F1数据的源TNL地址、激活失败的源TNL地址；
    所述接收部还接收所述宿主集中单元发送的业务映射信息，所述业务映射信息用于配置通过所述TNL隧道传输的下行数据的BAP路由标识以及所述第二宿主分布单元和下一跳子节点之间的回传RLC信道；
    所述接收部还接收所述第二宿主集中单元发送的TNL隧道传输更新或释放请求，所述TNL隧道传输更新或释放请求包括所述第一宿主分布单元的TNL隧道的端点TNL地址；所述TNL隧道传输更新或释放请求用于请求所述第二宿主单元去激活所述上行数据的TNL隧道传输或者释放所述TNL隧道；
    其中，所述TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通 过所述TNL隧道传输的上行F1用户面的源TNL地址、需要去激活通过所述TNL隧道传输的上行F1控制面的源TNL地址、需要去激活通过所述TNL隧道传输的上行非F1数据的源TNL地址；
    所述发送部还向所述第二宿主集中单元发送TNL隧道传输更新或释放响应，所述TNL隧道传输更新或释放响应包括所述第二宿主分布单元的TNL隧道的端点TNL地址；
    其中，所述TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过所述TNL隧道传输的上行F1用户面的源TNL地址、去激活成功的通过所述TNL隧道传输的上行F1控制面的源TNL地址、去激活成功的通过所述TNL隧道传输的上行非F1数据的源TNL地址、去激活失败的源TNL地址；
    所述接收部还接收由所述宿主集中单元发送的业务映射信息释放指示，所述业务映射信息释放指示用于释放去激活通过所述TNL隧道传输的下行数据的BAP路由标识以及所述第二宿主分布单元和下一跳子节点之间的回传RLC信道的配置。
  9. 根据权利要求1所述的装置，其中，所述IAB节点进行跨宿主集中单元的多路径分发，所述第一宿主分布单元属于第一宿主集中单元，第二宿主分布单元属于第二宿主集中单元。
  10. 根据权利要求9所述的装置，其中，
    所述接收部还接收所述第二宿主集中单元发送的TNL隧道传输建立请求，所述TNL隧道传输建立请求包括所述第一宿主分布单元的TNL隧道的端点TNL地址；其中，所述TNL隧道传输建立请求用于请求所述第二宿主分布单元建立所述TNL隧道或者激活所述上行数据的TNL隧道传输；
    其中，所述TNL隧道传输建立请求还包括如下至少之一：需要激活通过所述TNL隧道传输的上行F1用户面的源TNL地址、需要激活通过所述TNL隧道传输的上行F1控制面的源TNL地址、需要激活通过所述TNL隧道传输的上行非F1数据的源TNL地址、需要激活通过所述TNL隧道传输的上行F1用户面的GTP TEID；
    所述发送部还向所述第二宿主集中单元发送TNL隧道传输建立响应，所述TNL隧道传输建立响应包括所述第二宿主分布单元的TNL隧道的端点TNL地址；
    其中，所述TNL隧道传输建立响应还包括如下至少之一：激活成功的通过所述TNL隧道传输的上行F1用户面的源TNL地址、激活成功的通过所述TNL隧道传输 的上行F1控制面的源TNL地址、激活成功的通过所述TNL隧道传输的上行非F1数据的源TNL地址、激活失败的源TNL地址；
    所述接收部还接收所述宿主集中单元发送的业务映射信息，所述业务映射信息用于配置通过所述TNL隧道传输的下行数据的BAP路由标识以及所述第二宿主分布单元和下一跳子节点之间的回传RLC信道；
    所述接收部还接收所述第二宿主集中单元发送的TNL隧道传输更新或释放请求，所述TNL隧道传输更新或释放请求包括所述第一宿主分布单元的TNL隧道的端点TNL地址；所述TNL隧道传输更新或释放请求用于请求所述第二宿主单元去激活所述上行数据的TNL隧道传输或者释放所述TNL隧道；
    其中，所述TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过所述TNL隧道传输的上行F1用户面的源TNL地址、需要去激活通过所述TNL隧道传输的上行F1控制面的源TNL地址、需要去激活通过所述TNL隧道传输的上行非F1数据的源TNL地址、需要去激活通过所述TNL隧道传输的上行F1用户面的GTP TEID；
    所述发送部还向所述第二宿主集中单元发送TNL隧道传输更新或释放响应，所述TNL隧道传输更新或释放响应包括所述第二宿主分布单元的TNL隧道的端点TNL地址；
    其中，所述TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过所述TNL隧道传输的上行F1用户面的源TNL地址、去激活成功的通过所述TNL隧道传输的上行F1控制面的源TNL地址、去激活成功的通过所述TNL隧道传输的上行非F1数据的源TNL地址、去激活失败的源TNL地址；
    所述接收部还接收由所述宿主集中单元发送的业务映射信息释放指示，所述业务映射信息释放指示用于释放去激活通过所述TNL隧道传输的下行数据的BAP路由标识以及所述第二宿主分布单元和下一跳子节点之间的回传RLC信道的配置。
  11. 一种集成的接入和回传IAB的通信装置，包括：
    接收部，其接收向IAB节点发送的下行数据；
    处理部，其为所述下行数据添加传输网络层TNL隧道相关的报头；以及
    发送部，其通过所述传输网络层隧道向第二宿主分布单元发送所述下行数据。
  12. 根据权利要求11所述的装置，其中，所述报头包括如下至少之一：互联网 协议报头、通用无线分组业务隧道协议报头、用户数据报协议报头或传输控制协议报头；
    其中，所述报头的源传输网络层地址为第一宿主分布单元的传输网络层地址或能够通过所述第一宿主分布单元路由的TNL地址，所述报头的目标传输网络层地址为所述第二宿主分布单元的传输网络层地址。
  13. 根据权利要求11所述的装置，其中，所述IAB节点从第一宿主分布单元切换到所述第二宿主分布单元，或者，所述IAB节点到所述第一宿主分布单元无线链路失败后RRC重建立到所述第二宿主分布单元；其中，所述第一宿主分布单元和所述第二宿主分布单元属于同一宿主集中单元。
  14. 根据权利要求13所述的装置，其中，
    所述接收部还接收所述宿主集中单元发送的TNL隧道传输建立请求，所述TNL隧道传输建立请求包括所述第二宿主分布单元的TNL隧道的端点TNL地址；所述TNL隧道传输建立请求用于请求所述第一宿主分布单元建立所述TNL隧道或者激活所述下行数据的TNL隧道传输；
    其中，所述TNL隧道传输建立请求还包括如下至少之一：需要激活通过所述TNL隧道传输的下行F1用户面的目标TNL地址、需要激活通过所述TNL隧道传输的下行F1控制面的目标TNL地址、需要激活通过所述TNL隧道传输的下行非F1数据的目标TNL地址；
    所述发送部还向所述宿主集中单元发送TNL隧道传输建立响应，所述TNL隧道传输建立响应包括所述第一宿主分布单元的TNL隧道的端点TNL地址；
    其中，所述TNL隧道传输建立响应还包括如下至少之一：激活成功的通过所述TNL隧道传输的下行F1用户面的目标TNL地址、激活成功的通过所述TNL隧道传输的下行F1控制面的目标TNL地址、激活成功的通过所述TNL隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址；
    所述接收部还接收所述宿主集中单元发送的TNL隧道传输更新或释放请求，所述TNL隧道传输更新或释放请求包括所述第二宿主分布单元的TNL隧道的端点TNL地址；其中，所述TNL隧道传输更新或释放请求用于请求所述第一宿主分布单元去激活所述下行数据的TNL隧道传输或者释放所述TNL隧道；
    其中，所述TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活的 通过所述TNL隧道传输的下行F1用户面的目标TNL地址、需要去激活的通过所述TNL隧道传输的下行F1控制面的目标TNL地址、需要去激活的通过所述TNL隧道传输的下行非F1数据的目标TNL地址；
    所述发送部还向所述宿主集中单元发送TNL隧道传输更新或释放响应，所述TNL隧道传输更新或释放响应包括所述第一宿主分布单元的TNL隧道的端点TNL地址；
    其中，所述TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过所述TNL隧道传输的下行F1用户面的目标TNL地址、去激活成功的通过所述TNL隧道传输的下行F1控制面的目标TNL地址、去激活成功的通过所述TNL隧道传输的下行非F1数据的目标TNL地址、去激活失败的目标TNL地址。
  15. 根据权利要求11所述的装置，其中，所述IAB节点进行宿主集中单元内的多路径分发，第一宿主分布单元和所述第二宿主分布单元属于同一宿主集中单元。
  16. 根据权利要求15所述的装置，其中，
    所述接收部还接收所述宿主集中单元发送的TNL隧道传输建立请求，所述TNL隧道传输建立请求包括所述第二宿主分布单元的TNL隧道的端点TNL地址；所述TNL隧道传输建立请求用于请求所述第一宿主分布单元建立所述TNL隧道或者激活所述下行数据的TNL隧道传输；
    其中，所述TNL隧道传输建立请求还包括如下至少之一：需要激活通过所述TNL隧道传输的下行F1用户面的目标TNL地址、需要激活通过所述TNL隧道传输的下行F1控制面的目标TNL地址、需要激活所述TNL通过隧道传输的下行非F1数据的目标TNL地址、需要激活通过所述TNL隧道传输的下行F1用户面的GTP TEID；
    所述发送部还向所述宿主集中单元发送TNL隧道传输建立响应，所述TNL隧道传输建立响应包括所述第一宿主分布单元的TNL隧道的端点TNL地址；
    其中，所述TNL隧道传输建立响应还包括如下至少之一：激活成功的通过所述TNL隧道传输的下行F1用户面的目标TNL地址、激活成功的通过所述TNL隧道传输的下行F1控制面的目标TNL地址、激活成功的通过所述TNL隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址；
    所述接收部还接收所述宿主集中单元发送的TNL隧道传输更新或释放请求，所述TNL隧道传输更新或释放请求包括所述第二宿主分布单元的TNL隧道的端点TNL 地址；其中，所述TNL隧道传输更新或释放请求用于请求所述第一宿主分布单元去激活所述下行数据的TNL传输或者释放所述TNL隧道；
    其中，所述TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过所述TNL隧道传输的下行F1用户面的目标TNL地址、需要去激活通过所述TNL隧道传输的下行F1控制面的目标TNL地址、需要去激活通过所述TNL隧道传输的下行非F1数据的目标TNL地址、需要去激活通过所述TNL隧道传输的下行F1用户面的GTP TEID；
    所述发送部还向所述宿主集中单元发送TNL隧道传输更新或释放响应，所述TNL隧道传输更新或释放响应包括所述第一宿主分布单元的TNL隧道的端点TNL地址；
    其中，所述TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过所述TNL隧道传输的下行F1用户面的目标TNL地址、去激活成功的通过所述TNL隧道传输的下行F1控制面的目标TNL地址、去激活成功的通过所述TNL隧道传输的下行非F1数据的目标TNL地址、去激活失败的目标TNL地址。
  17. 根据权利要求11所述的装置，其中，所述IAB节点从第一宿主分布单元切换到所述第二宿主分布单元，或者，所述IAB节点到所述第一宿主分布单元无线链路失败后RRC重建立到所述第二宿主分布单元，所述第一宿主分布单元属于第一宿主集中单元，所述第二宿主分布单元属于第二宿主集中单元。
  18. 根据权利要求17所述的装置，其中，
    所述接收部还接收所述第一宿主集中单元发送的TNL隧道传输建立请求，所述TNL隧道传输建立请求包括所述第二宿主分布单元的TNL隧道的端点TNL地址；所述TNL隧道传输建立请求用于请求所述第一宿主分布单元建立所述TNL隧道或者激活所述下行数据的TNL隧道传输；
    其中，所述TNL隧道传输建立请求还包括如下至少之一：需要激活通过所述TNL隧道传输的下行F1用户面的目标TNL地址、需要激活通过所述TNL隧道传输的下行F1控制面的目标TNL地址、需要激活通过所述TNL隧道传输的下行非F1数据的目标TNL地址；
    所述发送部还向所述第一宿主集中单元发送TNL隧道传输建立响应，所述TNL隧道传输建立响应包括所述第一宿主分布单元的TNL隧道的端点TNL地址；
    其中，所述TNL隧道传输建立响应还包括如下至少之一：激活成功的通过所述TNL隧道传输的下行F1用户面的目标TNL地址、激活成功的通过所述TNL隧道传输的下行F1控制面的目标TNL地址、激活成功的通过所述TNL隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址；
    所述接收部还接收所述第一宿主集中单元发送的TNL隧道传输更新或释放请求，所述TNL隧道传输更新或释放请求包括所述第二宿主分布单元的TNL隧道的端点TNL地址；其中，所述TNL隧道传输建立请求用于请求所述第一宿主分布单元去激活所述下行数据的TNL隧道传输或释放所述TNL隧道；
    其中，所述TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过所述TNL隧道传输的下行F1用户面的目标TNL地址、需要去激活通过所述TNL隧道传输的下行F1控制面的目标TNL地址、需要去激活通过所述TNL隧道传输的下行非F1数据的目标TNL地址；
    所述发送部还向所述第一宿主集中单元发送TNL隧道传输更新或释放响应，所述TNL隧道传输更新或释放响应包括所述第一宿主分布单元的TNL隧道的端点TNL地址；
    其中，所述TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过所述TNL隧道传输的下行F1用户面的目标TNL地址、去激活成功的通过所述TNL隧道传输的下行F1控制面的目标TNL地址、去激活成功的通过所述TNL隧道传输的下行非F1数据的目标TNL地址、去激活失败的目标TNL地址。
  19. 根据权利要求11所述的装置，其中，所述IAB节点进行跨宿主集中单元的多路径分发，第一宿主分布单元属于第一宿主集中单元，所述第二宿主分布单元属于第二宿主集中单元。
  20. 根据权利要求19所述的装置，其中，
    所述接收部还接收所述第一宿主集中单元发送的TNL隧道传输建立请求，所述TNL隧道传输建立请求包括所述第二宿主分布单元的TNL隧道的端点TNL地址；所述TNL隧道传输建立请求用于请求所述第一宿主分布单元建立所述TNL隧道或者激活所述下行数据的TNL隧道传输；
    其中，所述TNL隧道传输建立请求还包括如下至少之一：需要激活通过所述TNL隧道传输的下行F1用户面的目标TNL地址、需要激活通过所述TNL隧道传输的下 行F1控制面的目标TNL地址、需要激活通过所述TNL隧道传输的下行非F1数据的目标TNL地址、需要激活通过所述TNL隧道传输的下行F1用户面的GTP TEID；
    所述发送部还向所述第一宿主集中单元发送TNL隧道传输建立响应，所述TNL隧道传输建立响应包括所述第一宿主分布单元的TNL隧道的端点TNL地址；
    其中，所述TNL隧道传输建立响应还包括如下至少之一：激活成功的通过所述TNL隧道传输的下行F1用户面的目标TNL地址、激活成功的通过所述TNL隧道传输的下行F1控制面的目标TNL地址、激活成功的通过所述TNL隧道传输的下行非F1数据的目标TNL地址、激活失败的目标TNL地址；
    所述接收部还接收所述第一宿主集中单元发送的TNL隧道传输更新或释放请求，所述TNL隧道传输更新或释放请求包括所述第二宿主分布单元的TNL隧道的端点TNL地址；其中，所述TNL隧道传输更新或释放请求用于请求所述第一宿主分布单元去激活所述下行数据的TNL传输或者释放所述TNL隧道；
    其中，所述TNL隧道传输更新或释放请求还包括如下至少之一：需要去激活通过所述TNL隧道传输的下行F1用户面的目标TNL地址、需要去激活通过所述TNL隧道传输的下行F1控制面的目标TNL地址、需要去激活通过所述TNL隧道传输的下行非F1数据的目标TNL地址、需要去激活通过所述TNL隧道传输的下行F1用户面的GTP TEID；
    所述发送部还向所述第一宿主集中单元发送TNL隧道传输更新或释放响应，所述TNL隧道传输更新或释放响应包括所述第一宿主分布单元的TNL隧道的端点TNL地址；
    其中，所述TNL隧道传输更新或释放响应还包括如下至少之一：去激活成功的通过所述TNL隧道传输的下行F1用户面的目标TNL地址、去激活成功的通过所述TNL隧道传输的下行F1控制面的目标TNL地址、去激活成功的通过所述TNL隧道传输的下行非F1数据的目标TNL地址、去激活失败的目标TNL地址。
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CN110351700A (zh) * 2018-04-05 2019-10-18 中兴通讯股份有限公司 一种自接入回传链路的中继转发方法及节点
WO2020039400A1 (en) * 2018-08-23 2020-02-27 Telefonaktiebolaget Lm Ericsson (Publ) Transport layer handling for split radio network architecture

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CN110351700A (zh) * 2018-04-05 2019-10-18 中兴通讯股份有限公司 一种自接入回传链路的中继转发方法及节点
WO2020039400A1 (en) * 2018-08-23 2020-02-27 Telefonaktiebolaget Lm Ericsson (Publ) Transport layer handling for split radio network architecture

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