WO2021244498A1 - 自回传网络切换的方法、装置和网络设备 - Google Patents

自回传网络切换的方法、装置和网络设备 Download PDF

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Publication number
WO2021244498A1
WO2021244498A1 PCT/CN2021/097495 CN2021097495W WO2021244498A1 WO 2021244498 A1 WO2021244498 A1 WO 2021244498A1 CN 2021097495 W CN2021097495 W CN 2021097495W WO 2021244498 A1 WO2021244498 A1 WO 2021244498A1
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network
iab
switching command
network switching
network node
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PCT/CN2021/097495
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English (en)
French (fr)
Inventor
刘进华
杨晓东
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维沃移动通信有限公司
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Priority to EP21817858.0A priority Critical patent/EP4161148A4/en
Priority to JP2022572313A priority patent/JP2023526133A/ja
Priority to KR1020227046149A priority patent/KR20230018470A/ko
Publication of WO2021244498A1 publication Critical patent/WO2021244498A1/zh
Priority to US17/989,345 priority patent/US20230076206A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H04W36/087—Reselecting an access point between radio units of access points

Definitions

  • the embodiments of the present application relate to the field of communications, and in particular, to a method, device, and network equipment for self-backhauling network switching.
  • IAB Integrated Access Backhaul
  • NR New Radio
  • IAB node IAB node
  • the UE and the access node transmit data through a wireless access link, and the access nodes can transmit data through a wireless backhaul link.
  • an IAB node may include a DU function part and a mobile terminal (Mobile Termination, MT) function part. Relying on the MT function part, an access node (ie IABN) can find an upstream access node (ie Parent IABN, P-IABN), and establish a wireless backhaul link with the DU of the upstream access node. After an IAB node establishes a complete backhaul link, the IAB node turns on its DU function, and the DU will provide cell services, that is, the DU can provide network access services for the UE.
  • the source CU network needs to send a network switching command to each IAB network node in the IAB network to complete the IAB network Switching of all IAB network nodes in the
  • the switch command of the source CU network cannot be issued to the downstream IAB network node, and the network switching process cannot be completed.
  • the purpose of the embodiments of this application is to provide a self-backhauled network switching method, device, and network equipment to ensure that the switching command of the source CU network can be issued to downstream IAB network nodes, so that the IAB network to be switched can be switched from the source CU.
  • the network is successfully switched to the target CU network.
  • a self-backhauling network switching method which is applied to a first IAB network node, and the method includes: receiving a network switching command, wherein the network switching command includes a first network switching command and a second network switching command.
  • the first network switching command is used to instruct the first IAB network node to be switched from the source CU network to the target CU network
  • the second network switching command is used to instruct other network nodes to be switched from the source CU network Switch to the target CU network
  • the other network nodes are network nodes downstream of the first IAB network node in the IAB network to be switched; after switching the first IAB network node to all the nodes according to the first network switching command
  • the second network switching command is sent to the second IAB network node or the UE served by the first IAB network node, and the second IAB network node is the network node of the first IAB network node. Child IAB network node.
  • a self-backhauling network switching device comprising: a receiving module for receiving a network switching command, wherein the network switching command includes a first network switching command and a second network switching command
  • the first network switching command is used to instruct to switch the first IAB network node from the source CU network to the target CU network
  • the second network switching command is used to instruct to switch other network nodes from the source CU network to the target CU network CU network
  • the other network nodes are the network nodes downstream of the first IAB network node in the IAB network to be switched
  • the processing module is configured to switch the first IAB network node according to the first network switching command After reaching the target CU network, send the second network switching command to a second IAB network node or a UE served by the first IAB network node, where the second IAB network node is the first IAB network The node's child IAB network node.
  • a network device including a processor, a memory, and a program or instruction that is stored on the memory and can run on the processor, and the program or instruction is implemented when the processor is executed.
  • a readable storage medium is provided, and a program or instruction is stored on the readable storage medium. Method steps.
  • the first IAB network node receives the network switching command and switches from the source CU network to the source CU network according to the first network switching command in the network switching command.
  • the second network switching command used to instruct the network node downstream of the first IAB network node to switch from the source CU network to the target CU network in the network switching command is sent to the second IAB network node or the first IAB network node
  • the served UE can prevent the second network switching command caused by the disconnection of the first IAB network node from the source CU network from being issued to the downstream node of the first IAB network node, thereby ensuring that it is used for switching the CU network
  • the handover command can be issued to each node in the IAB network to be handed over, where the nodes in the IAB network to be handed over include: each network node in the IAB network to be handed over and the UEs it serves, thereby ensuring that the handover The handover process of the IAB network is proceeding smoothly.
  • FIG. 1 is a schematic structural diagram of an IAB system according to an embodiment of the present application.
  • Fig. 2 is a schematic structural diagram of an IAB network to be handed over according to an embodiment of the present application
  • Fig. 3 is a schematic flowchart of a method for self-backhauling network handover according to an embodiment of the present application
  • Fig. 4 is a schematic flowchart of a method for self-backhauling network handover according to an embodiment of the present application
  • Fig. 5 is a schematic flowchart of a method for self-backhauling network handover according to an embodiment of the present application
  • Fig. 6 is a schematic structural diagram of an apparatus for self-backhauling network switching according to an embodiment of the present application.
  • Fig. 7 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • user equipment may include, but is not limited to, mobile station (Mobile Station, MS), mobile terminal (Mobile Terminal), mobile phone (Mobile Telephone), mobile phone (handset), and portable equipment
  • the UE can communicate with one or more core networks via a radio access network (Radio Access Network, RAN).
  • RAN Radio Access Network
  • the UE can provide radio access services by an IAB network node.
  • the UE may be a mobile phone (or called a "cellular" phone), a computer with wireless communication function, etc.
  • the terminal device may also be a portable, pocket-sized, handheld, built-in computer or vehicle-mounted mobile device.
  • the CU-DU structure diagram of the IAB system provided by the embodiment of this application, in a self-backhauling link, the most upstream IAB network in the IAB network (IAB network 1 in Figure 1)
  • the DUs in the nodes are all connected to a CU network, and the CU network can configure the DU through the F1-AP protocol, and configure the MT through the radio resource control (Radio Resource Control, RRC) protocol.
  • a self-backhauling link also includes a Donor IAB network node (or IAB Donor).
  • the Donor IAB network node does not have the MT function part, but the Donor IAB network node has a wired transmission network directly connected to it. .
  • the IAB network 1 may include multiple IAB network nodes connected step by step as shown in FIG. IAB3...), and UEs that provide network access services through each IAB network node (UE1, UE2... as shown in Figure 2), where the IAB network node IAB1 is the most upstream IAB network node in the IAB network 1.
  • the network node IAB1 is the parent IAB network node of the adjacent downstream network node IAB2
  • the network node IAB2 is the parent IAB network node of the adjacent downstream network node IAB3..., in other words, the network node IAB2 is the adjacent upstream
  • the sub-IAB network node of the network node IAB1 and the network node IAB3 are the sub-IAB network nodes of the downstream network node IAB2 adjacent thereto.
  • an IAB network node can provide network access services for one or more UEs.
  • FIG. 3 shows that an exemplary embodiment of the present application provides a method 300 for self-backhauling network switching.
  • the method 300 may be executed by a first IAB network node, and the first IAB network node may be in the IAB network to be switched. Any IAB network node, such as "IAB1, IAB2, IAB3" in Figure 2.
  • the method 300 may be executed by software or hardware installed in the first IAB network node, and the method at least includes the following steps.
  • the first IAB network node receives the network switching command.
  • the network switching command may include at least a first network switching command and a second network switching command.
  • the first network switching command is used to instruct to switch the first IAB network node from the source CU network to the target CU network
  • the second network switching command is used for
  • the other network nodes are the network nodes downstream of the first IAB network node in the IAB network to be switched, and the network node may be an IAB network node or an IAB network node served ⁇ UE.
  • this step specifically includes the first IAB network node, that is, the most upstream IAB network node.
  • the upstream IAB network node receives the network switching command sent by the source CU network node.
  • the network switching command may be determined by the source CU network node to determine that the target CU network node is the IAB to be switched. All network switching commands generated by network nodes in the network are forwarded.
  • the process of the source CU network node forwarding the network switching command to the first IAB network node can be implemented by the following (1)-(3).
  • the source CU network generates a network switching request (Migration Request) for all network nodes in the IAB network to be switched (including the IAB network node and the UE served by the IAB network node, etc.) and sends it to the target CU network, where each The network switching request includes the context information of each network node.
  • Migration Request a network switching request for all network nodes in the IAB network to be switched (including the IAB network node and the UE served by the IAB network node, etc.) and sends it to the target CU network, where each The network switching request includes the context information of each network node.
  • the target CU network After the target CU network receives the network switch request sent by the source CU network, it can establish a network switch to serve each network node in the IAB network to be switched according to the context information of each network node carried in the network switch request Environment (including DU and MT), such as establishing bearer, configuring radio resources, configuring backhaul channels, etc., and generating corresponding network nodes in the IAB network to be handed over (including IAB network nodes and UEs served by IAB network nodes)
  • the network switching command for, for example, includes 5 network switching commands corresponding to IAB1-3 and UE1-2 respectively, and the network switching command is sent to the source CU network.
  • the source CU network After receiving the network switching command, the source CU network sends the network switching command to the most upstream IAB network node in the IAB network to be switched.
  • the source CU network can be determined to receive the target CU network as In the case of all network switching commands generated by network nodes in the IAB network to be switched, the network switching commands are then forwarded to the most upstream IAB network node. For example, after receiving a total of 5 network switching commands corresponding to IAB1-3 and UE1-2, the source CU network forwards the network switching command to the most upstream IAB network node.
  • the sending mode of the network switching command is not limited in this embodiment.
  • the network switching command is sent from the IAB network to be switched Forwarded by the parent IAB network node of the first IAB network node.
  • the network switching command is forwarded by the parent IAB network node IAB1 of IAB2
  • the network switching command It is forwarded by the parent IAB network node IAB2 of IAB3.
  • S320 After switching the first IAB network node to the target CU network according to the first network switching command, send the second network switching command to the second IAB network node or the UE served by the first IAB network node.
  • the second IAB network node is a child IAB network node of the first IAB network node.
  • the aforementioned sub-IAB network node refers to the next IAB network node downstream of the first IAB network node and adjacent to the first IAB network node.
  • the second IAB network node may be IAB2 shown in FIG. 2
  • the UE served by the first IAB network node may be as shown in FIG.
  • the second IAB network node can be IAB3 shown in Figure 2
  • the UE served by the first IAB network node can be as shown in Figure 2.
  • the first IAB network node performs network switching according to the first network switching command, including but not limited to the reconfiguration of DU, MT, and S1-U(S1 for the first IAB network node). the user plane) or the switching of the data channel on the NG-U interface, etc.
  • NG-U is a user plane interface between a radio access network (NG-RAN) and a 5G core network (5GC), where the switching sequence of each part, etc., is not limited in this embodiment.
  • the first IAB network node receives the network switching command and switches from the source CU network to the target CU network according to the first network switching command.
  • the second network switching command used to instruct the network node downstream of the first IAB network node to switch from the source CU network to the target CU network is sent to the second IAB network node or the UE served by the first IAB network node. Therefore, the second network switching command is issued by the first IAB network node without relying on the source CU network, thereby effectively avoiding the disconnection of the first IAB network node from the source CU network after the network switch is completed.
  • the second network switching command cannot be issued to the downstream IAB network node to ensure that the IAB network switching process to be switched can proceed smoothly.
  • FIG. 4 is a method 400 for self-backhauling network switching provided by another embodiment of the application.
  • the method 400 may be executed by a first IAB network node, and the first IAB network node may be in the IAB network to be switched. Any IAB network node, such as "IAB1, IAB2, IAB3" in Figure 2.
  • the method may be executed by software or hardware installed in the first IAB network node, and the method includes the following steps.
  • This step can be described in the same or similar manner as step S310 in the embodiment of FIG. 3, and the repetitive part will not be repeated.
  • the network switching command may be transmitted through a signaling container (message container).
  • the source CU network receives the network switching command sent by the target CU network, and can store the network switching command in a signaling container that can be identified by the first IAB network node, so that the first IAB network node can pass the signaling
  • the container receives and recognizes the first network switching command and the second network switching command.
  • the source CU network transmits the network switching command corresponding to IAB1 through the signaling container 1, the network switching command corresponding to IAB2 through the signaling container 2, and the network switching command corresponding to IAB3 through the signaling container 3.
  • the signaling container 4 transmits the network switching command corresponding to UE1, and the signaling container 5 transmits the network switching command corresponding to UE2.
  • the signaling container is an F1-AP signaling container or an RRC signaling container.
  • a signaling container is used to implement the transmission of network switching commands, which can improve the recognition efficiency of the first IAB network node for network switching commands, and at the same time ensure the reliability of the transmission process of the second network switching commands, and avoid problems such as command loss. occur.
  • the first IAB network node may first determine that it has received all the data sent by the source CU network or the parent IAB network node The network switching command enables the first IAB network node to issue all corresponding second network switching commands to the second IAB network node or the UE served by the first IAB network node to instruct the downstream of the first IAB network node
  • the network node successfully completes the handover, and at the same time avoids the problem that any one of the network nodes downstream of the first network node is disconnected from the source CU network by the first IAB network node, and the second network switching command cannot be issued to the downstream node.
  • the first IAB network node may determine that it has received all the network switching commands sent by the source CU network or the parent IAB network node through at least one of the following three methods.
  • the total number of received network switching commands matches the total number of network switching commands indicated in the signaling container.
  • the signaling container may indicate the second number of network switching commands, and the first number of network switching commands (including the first network switching command and the second network switching command) received In the case where it is equal to the second number indicated in the signaling container, it can be determined that the reception of the network handover command is completed.
  • the signaling container can also indicate the sequence number of each network switching command, so when making a judgment, the total number of received network switching commands and the sequence number corresponding to each network switching command can be compared and analyzed at the same time. When both match, it is determined that the network switching command reception is completed.
  • the total number or/and sequence numbers of the received network switching commands can be determined according to the number or/and sequence numbers of the received signaling containers This embodiment does not limit this.
  • the received network switching command includes a predetermined network switching command, where the predetermined network switching command may be an MT switching command or a DU switching command. It is understandable that, since in an IAB network, the IAB network may include multiple IAB network nodes, and each IAB network node may include MT and DU, therefore, the predetermined network switching command may be corresponding to any predetermined IAB network node.
  • the predetermined network switching command that is, the MT switching command or the DU switching command may be an MT switching command or DU switching command corresponding to any predetermined IAB network node, which is not limited in this embodiment.
  • the source CU network or the parent IAB network node of the first IAB network node when the source CU network or the parent IAB network node of the first IAB network node is sending the network switching command, it can send the aforementioned predetermined network switching command last, so that the predetermined network is received at the first IAB network node When switching commands, it can be determined that the network switching commands sent by the source CU network or the parent IAB network node have all been received.
  • the notification message may be sent by the source CU network or the parent IAB network node to the first IAB network node after sending the network switching command, so as to notify the first IAB network node that all network switching commands have been sent, and the network can be started. Switch process.
  • the first IAB network node can determine that it has received the source CU network or the parent IAB network node according to any one or two or three of the foregoing three methods. All the network switching commands sent thereby ensure that each network node in the IAB network to be switched can be smoothly switched to the target CU network.
  • S430 Determine whether the first IAB network node is the command forwarding destination.
  • the subsequent steps are executed.
  • the first IAB network node when the first IAB network node is the command forwarding destination, the first IAB network node can directly switch from the source CU network to the target CU network according to the first network switching command, without switching commands or signaling to the second network
  • the container performs caching and forwarding. In this way, it is possible to avoid invalid storage and forwarding of the second network switching command, avoid waste of resources, and improve network switching efficiency.
  • the first IAB network node may, but is not limited to, determine the first IAB according to the destination Backhaul Adaptation Protocol (BAP) address in the routing ID (Routing ID) carried in the network handover command. Whether the network node is the end point of command forwarding.
  • BAP Backhaul Adaptation Protocol
  • the foregoing judgment based on the destination BAP address in this embodiment can improve the judgment efficiency and ensure the reliability of the judgment result.
  • this step is performed after the first IAB network node receives the network switching command and before executing the first network switching command.
  • the cached second network handover command can be issued to downstream network nodes, such as child IAB network nodes and UEs served by the first IAB network node, to instruct downstream network nodes to perform network handover .
  • caching the second network switching command may be implemented by caching a corresponding signaling container.
  • this step may include MT reconfiguration and DU reconfiguration.
  • the first IAB network node and the downstream network nodes served by it may be reconfigured.
  • the configuration information of the UE served by the network node does not match, and the second network handover command cannot be issued to the downstream network node. Therefore, in one or more embodiments of the present application, the first IAB network node is in accordance with the first IAB network node.
  • the process of switching a network switching command from the source CU network to the target CU network may include: performing MT reconfiguration according to the first network switching command.
  • This step can be described in the same or similar manner as step S320 in the embodiment of FIG. 3, and repeated descriptions are omitted.
  • the MT reconfiguration is performed in S450 but the DU reconfiguration is not performed, after S460, it also includes after determining that the second network switching command is sent to the second IAB network node or the UE served by the first IAB network node DU reconfiguration of the first IAB network node according to the first network switching command can avoid the first IAB network node and the downstream network nodes served by it after reconfiguration of the DU of the first IAB network node ( For example, the configuration information of the second IAB network node or the UE served by the first IAB network node does not match, thereby causing the second network handover command to fail to be issued to the downstream network node.
  • S470 Send a network switching completion notification to the target CU network.
  • the first IAB network node may also send a network switching completion notification to the target CU network to notify the target CU network that the switching of the first IAB network node has been completed, and The target CU network can notify the source CU network that the handover of the first IAB network node has been completed, and the source CU network can delete the context information and related configuration about the first IAB network node.
  • the first IAB network node after receiving the network switching command, the first IAB network node first caches the second network switching command used to instruct the downstream network node to perform the network switching. After the first IAB network node switches to the target CU network, the second network switching command is sent to the second IAB network node or the UE served by the first IAB network node. Therefore, the second network switching command is sent from the first IAB network node.
  • the IAB network node is issued without relying on the source CU network, thereby effectively avoiding that the second network switching command cannot be issued to the downstream IAB because the first IAB network node is disconnected from the source CU network after the network switch is completed. The problem of the network node ensures that the IAB network switching process to be switched can be carried out smoothly.
  • FIG. 5 is a method 500 for self-backhauling network switching provided by another embodiment of the application.
  • the method 500 may be executed by a first IAB network node, and the first IAB network node may be in the IAB network to be switched.
  • Any IAB network node such as IAB1, IAB2, IAB3...IABn, and UE1, UE2...UEn in FIG. 2.
  • the method may be executed by software or hardware installed in the first IAB network node, and the method includes the following steps.
  • IAB1 receives a network switching command.
  • IAB1 is the first IAB network node in this step.
  • IAB1 is the most upstream IAB network node in the IAB network to be handed over, and its downstream network nodes are other network nodes, including: IAB2, IAB3, and UE1 UE2.
  • IAB1 receives a network switching command from the source CU network node, and the network switching command includes a first network switching command and a second network switching command.
  • the network switching command may include a network switching command a transmitted by signaling container 1 instructing IAB1 to perform network switching, a network switching command transmitted by signaling container 2 instructing IAB2 to perform network switching, and a network switching command transmitted by signaling container 3 by IAB3.
  • the network switching command c for network switching the network switching command d corresponding to UE1 transmitted through the signaling container 4, and the network switching command e corresponding to UE2 transmitted through the signaling container 5.
  • the network switching command a can be used as the first network switching command in this step, and the network switching commands b-e can be used as the second network switching command in this step.
  • IAB1 determines that it has completed the reception of the network switching command.
  • IAB1 is not the end of the command forwarding, so the following steps are performed.
  • the IAB1 caches the network switching command b-e through the DU, and optionally, the corresponding signaling container 2-5 can be cached.
  • the specific implementation process of this step please refer to the description of the corresponding part of S440, which will not be repeated here.
  • S515 Switch the IAB1 from the source CU network to the target CU network according to the network switch command a.
  • S516 After switching the IAB1 to the target CU network according to the network switching command a, send the second network switching command to the second IAB network node or the UE served by the first IAB network node.
  • the second network switching command when the second network switching command is sent to the second IAB network node, the second network switching command is transmitted through the signaling container.
  • the network switching command b-e when the IAB1 sends the network switching command b-e to the IAB2, the network switching command b-e is transmitted through the signaling container, that is, the corresponding signaling container 2-5 is transmitted.
  • the second network switching command in the signaling container may be read And send it to the UE.
  • IAB1 sends the second network switching command to UE1 it serves
  • IAB1 reads the second network switching command d corresponding to UE1 in the signaling container, and transfers the read second network switching command d
  • the handover command d is sent to UE1.
  • UE1 receives the second network switching command d, it switches from the source CU network to the target CU network according to the network switching command d.
  • IAB2 receives the network switching command.
  • IAB2 serves as the first IAB network node that receives the network switching command
  • the downstream network nodes at this time are other network nodes, including: IAB3 and UE2.
  • IAB2 in the IAB network to be switched, IAB2 is a child node of IAB1, and it receives a network switching command be from IAB1.
  • the network switching command be includes a first network switching command b and a second network switching command c, d, e.
  • it may include the network handover command b corresponding to IAB2 transmitted through the signaling container 2, the network handover command c corresponding to IAB3 transmitted through the signaling container 3, and the network handover command d corresponding to UE1 transmitted through the signaling container 4.
  • the network switching command b can be used as the first network switching command in this step, and the network switching commands c, d, and e can be used as the second network switching command in this step.
  • IAB2 is not the end point of command forwarding, so the following steps are performed.
  • the IAB2 caches the network switching command b-e through the DU, and optionally, the corresponding signaling container 3-5 can be cached.
  • the specific implementation process of this step please refer to the description of the corresponding part of S440, which will not be repeated here.
  • S525 Switch the IAB2 from the source CU network to the target CU network according to the network switch command b.
  • S526 After switching the first IAB network node to the target CU network according to the first network switching command, send the second network switching command to a second IAB network node or the first IAB network The UE served by the node.
  • the second network switching command when the second network switching command is sent to the second IAB network node, the second network switching command is transmitted through the signaling container.
  • the IAB2 sends the network switching command c-e to the IAB3
  • the network switching command c-e is transmitted through the signaling container, that is, the corresponding signaling container 3-5 is transmitted.
  • the second network switching command in the signaling container may be read And send it to the UE.
  • IAB2 sends the second network switching command to UE2 it serves
  • IAB2 reads the second network switching command e corresponding to UE2 in the signaling container, and transfers the read second network
  • the handover command e is sent to UE2.
  • UE2 receives the second network switching command e, it switches from the source CU network to the target CU network according to the network switching command e.
  • IAB3 receives the network switching command.
  • IAB3 is the first IAB network node that receives the network switching command in this step.
  • IAB3 is a child node of IAB2 in the IAB network to be switched, and it receives the network switching command ce from IAB2.
  • the network switching The command ce includes the first network switching command c and the second network switching commands d and e.
  • it may include a network handover command c corresponding to IAB3 transmitted through the signaling container 3, a network handover command d corresponding to UE1 transmitted through the signaling container 4, and a network handover command e corresponding to UE2 transmitted through the signaling container 5.
  • the network switching command c can be used as the first network switching command in this step, and the network switching commands d and e can be used as the second network switching command in this step.
  • the IAB3 determines that it has completed the reception of the network switching command.
  • S533 Determine whether IAB3 is the command forwarding end point.
  • IAB3 is the end point of command forwarding, so the following steps are performed.
  • S534 Switch the IAB3 from the source CU network to the target CU network according to the network switch command c.
  • IAB3 is the end point of the command forwarding, there is no need to perform the operation of the cache switching command.
  • the execution subject may be a device for self-backhauling network switching, or a control module in the device for executing and loading the foregoing method.
  • a method for performing a self-loading and self-backhauling network switching performed by a self-backhauling network switching device is taken as an example to illustrate the method for self-backhauling network switching provided in the embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a self-backhauling network switching apparatus 600 according to an embodiment of the present application.
  • the self-backhauling network switching apparatus 600 may be a first IAB network node or applied to a first IAB network node, as shown in FIG. 6
  • the device 600 for self-backhauling network switching includes at least a receiving module 610 and a processing module 620.
  • the receiving module 610 is configured to receive a network switching command, where the network switching command includes a first network switching command and a second network switching command, and the first network switching command is used to instruct the first IAB network node to be transferred from The source CU network is switched to the target CU network, the second network switching command is used to instruct to switch other network nodes from the source CU network to the target CU network, and the other network nodes are the first IAB in the IAB network to be switched A network node downstream of the network node; a processing module 620, configured to send the second network switching command to the first network switching command after switching the first IAB network node to the target CU network according to the first network switching command 2.
  • An IAB network node or a UE served by the first IAB network node, and the second IAB network node is a child IAB network node of the first IAB network node.
  • the processing module 620 is further configured to cache the second network switching command through the DU.
  • the network switching command is when the source CU network node determines that it has received all network switching commands generated by the target CU network node for the network node in the IAB network to be switched Forwarded; or forwarded by the parent IAB network node of the first IAB network node in the IAB network to be switched.
  • the network switching command is transmitted through a signaling container.
  • the processing module 620 is configured to send the second network switching command to the second IAB network node, the second network switching command is passed through The signaling container is transmitted; and when the second network switching command is sent to the UE served by the first IAB network node, the second network switching command in the signaling container is read And send it to the UE.
  • the signaling container is an F1-AP signaling container or an RRC signaling container.
  • the processing module 620 is configured to cache the signaling container and call the processing module when the first IAB network node is not the command forwarding destination 620 executes the sending of the second network switching command to the second IAB network node or the first network switching command after switching the first IAB network node to the target CU network according to the first network switching command The steps of the UE served by the IAB network node.
  • the processing module 620 is configured to determine whether the first IAB network node is the command forwarding destination according to the destination BAP address in the routing identifier carried in the network switching command.
  • the processing module 620 is configured to determine that the first IAB network node has completed the reception of the network handover command by using at least one of the following methods, where the following method It includes: the total number of received network switching commands matches the total number of network switching commands indicated in the signaling container; the received network switching commands include a predetermined network switching command, wherein the predetermined network switching The command is an MT handover command or a DU handover command; a notification message used to characterize the completion of the handover command is received.
  • the processing module 620 is configured to perform MT reconfiguration according to the first network switching command; and after determining that the second network switching command is sent to the second IAB network After the node, perform DU reconfiguration on the first IAB network node according to the first network switching command.
  • the processing module 620 is further configured to send a network switching completion notification to the target CU network.
  • the terminal device 600 can refer to the procedures of the methods 300-400 corresponding to the embodiments of the present invention, and each unit/module in the terminal device 600 and the other operations and/or functions mentioned above are used to implement the method 300-
  • the corresponding process in 400 can achieve the same or equivalent technical effect. For the sake of brevity, it will not be repeated here.
  • FIG. 7 is a structural diagram of a network device applying a self-backhauling network switching method provided by an embodiment of the present application, which can implement the details of the method embodiment, such as the steps of the method 300 or the method 400, and achieve the same Effect.
  • the network device 700 includes: a processor 701, a transceiver 702, a memory 703, and a bus interface, where:
  • the network device 700 further includes: a program or instruction that is stored in the memory 703 and can run on the processor 701. When the program or instruction is executed by the processor 701, the above-mentioned self-backhauling network switching can be realized.
  • a program or instruction that is stored in the memory 703 and can run on the processor 701.
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 701 and various circuits of the memory represented by the memory 703 are linked together.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, will not be further described herein.
  • the bus interface provides the interface.
  • the transceiver 702 may be a plurality of elements, including a transmitter and a receiver, and provide a unit for communicating with various other devices on a transmission medium.
  • the processor 701 is responsible for managing the bus architecture and general processing, and the memory 703 can store data used by the processor 901 when performing operations.
  • the embodiment of the present application further provides a readable storage medium, the readable storage medium stores a program or instruction, and when the program or instruction is executed by a processor, the method for implementing the above-mentioned self-backhauling network switching is described in the embodiments 300-400. Each process can achieve the same technical effect. In order to avoid repetition, it will not be repeated here.
  • the processor is the processor in the electronic device described in the foregoing embodiment.
  • the readable storage medium includes a computer readable storage medium, such as a computer read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disks, or optical disks.
  • An embodiment of the present application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a program or an instruction to implement the above-mentioned self-backhauling network switching
  • the chip includes a processor and a communication interface
  • the communication interface is coupled to the processor
  • the processor is used to run a program or an instruction to implement the above-mentioned self-backhauling network switching
  • chips mentioned in the embodiments of the present application may also be referred to as system-level chips, system-on-chips, system-on-chips, or system-on-chips.
  • the technical solution of this application essentially or the part that contributes to the existing technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, The optical disc) includes several instructions to make a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present application.
  • a terminal which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.

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Abstract

本申请公开了一种自回传网络切换的方法、装置和网络设备，该方法包括：第一IAB网络节点接收网络切换命令，网络切换命令包括用于指示将第一IAB网络节点由源CU网络切换至目标CU网络的第一网络切换命令和用于指示将其他网络节点由源CU网络切换至目标CU网络的第二网络切换命令，其他网络节点为待切换的IAB网络中第一IAB网络节点下游的网络节点；在根据第一网络切换命令将第一IAB网络节点切换至目标CU网络之后，将第二网络切换命令发送至第一IAB网络节点的子IAB网络节点或第一IAB网络节点所服务的UE。

Description

自回传网络切换的方法、装置和网络设备
相关申请的交叉引用
本申请主张在2020年06月01日在中国提交的中国专利申请号No.202010486601.3的优先权，其全部内容通过引用包含于此。
技术领域
本申请实施例涉及通信领域，尤其涉及一种自回传网络切换的方法、装置和网络设备。
背景技术
目前，在新空口(New Radio，NR)***中，接入回传一体化(Integrated Access Backhaul，IAB)可以为NR小区提供扩展覆盖，也可以为NR小区提供容量增强，其中，支持用户设备(User Equipment，UE，也可称之为终端设备)的无线接入并且将数据进行无线回传的接入节点称为IAB节点(IAB node，IABN)。UE和接入节点之间通过无线接入链路(access link)传输数据，接入节点之间可通过无线的回传链路(backhaul link)传输数据。
在支持集中式单元(Central Unit，CU)/分布式单元(Distributed Unit，DU)分离部署的IAB网络架构中，一个IAB节点可以包括DU功能部分和移动终端(Mobile Termination，MT)功能部分。依靠MT功能部分，一个接入节点(即IABN)可以找到一个上游接入节点(即Parent IABN，P-IABN)，并与上游接入节点的DU建立无线的回传链路。在一个IAB节点建立完整的回传链路后，该IAB节点打开其DU功能，DU会提供小区服务，即DU可以为UE提供网络接入服务。
其中，在IAB***中，当待切换的IAB网络从源CU网络向目标CU网络切换时，需要由源CU网络将网络切换命令发送给IAB网络中的各IAB网络节点，来完成对该IAB网络中所有IAB网络节点的切换。但是，由于上游IAB网络节点一旦切换完成，其会断开与源CU网络的连接，从而导致源CU网络的切换命令无法下发给下游IAB网络节点，进而导致网络切换流程无法完成。
发明内容
本申请实施例的目的是提供一种自回传网络切换的方法、装置和网络设备，以确保源CU网络的切换命令可以下发给下游IAB网络节点，从而使待切换的IAB网络从源CU网络顺利切换至目标CU网络。
第一方面，提供了一种自回传网络切换的方法，应用于第一IAB网络节点，所述方法包括：接收网络切换命令，其中，所述网络切换命令包括第一网络切换命令和第二网络切换命令，所述第一网络切换命令用于指示将所述第一IAB网络节点由源CU网络切换至目标CU网络，所述第二网络切换命令用于指示 将其他网络节点由源CU网络切换至目标CU网络，所述其他网络节点为待切换的IAB网络中所述第一IAB网络节点下游的网络节点；在根据所述第一网络切换命令将所述第一IAB网络节点切换至所述目标CU网络之后，将所述第二网络切换命令发送至第二IAB网络节点或所述第一IAB网络节点所服务的UE，所述第二IAB网络节点为所述第一IAB网络节点的子IAB网络节点。
第二方面，提供了一种自回传网络切换的装置，所述装置包括：接收模块，用于接收网络切换命令，其中，所述网络切换命令包括第一网络切换命令和第二网络切换命令，所述第一网络切换命令用于指示将所述第一IAB网络节点由源CU网络切换至目标CU网络，所述第二网络切换命令用于指示将其他网络节点由源CU网络切换至目标CU网络，所述其他网络节点为待切换的IAB网络中所述第一IAB网络节点下游的网络节点；处理模块，用于在根据所述第一网络切换命令将所述第一IAB网络节点切换至所述目标CU网络之后，将所述第二网络切换命令发送至第二IAB网络节点或所述第一IAB网络节点所服务的UE，所述第二IAB网络节点为所述第一IAB网络节点的子IAB网络节点。
第三方面，提供了一种网络设备，包括处理器，存储器及存储在所述存储器上并可在所述处理器上运行的程序或指令，所述程序或指令被所述处理器执行时实现如前述第一方面所述的自回传网络切换的方法的步骤。
第四方面，提供了一种可读存储介质，所述可读存储介质上存储程序或指令，所述程序或指令被处理器执行时实现如前述第一方面所述的自回传网络切换的方法的步骤。
本申请实施例提供的自回传网络切换的方法、装置和网络设备中，第一IAB网络节点通过接收网络切换命令，以及在根据网络切换命令中的第一网络切换命令从源CU网络切换至目标CU网络之后，将网络切换命令中用于指示第一IAB网络节点下游的网络节点由源CU网络切换至目标CU网络的第二网络切换命令发送至第二IAB网络节点或第一IAB网络节点所服务的UE，由此，能够避免第一IAB网络节点与源CU网络断开连接而导致的第二网络切换命令无法下发给第一IAB网络节点的下游节点，从而确保用于切换CU网络的切换命令可以下发给待切换的IAB网络中的各个节点，其中，待切换的IAB网络中的节点包括：待切换的IAB网络中的各网络节点及其所服务的UE，进而确保待切换的IAB网络的切换流程的顺利进行。
附图说明
此处所说明的附图用来提供对本申请的进一步理解，构成本申请的一部分，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1是根据本申请的一个实施例的IAB***的结构示意图；
图2是根据本申请的一个实施例的待切换的IAB网络的结构示意图；
图3是根据本申请的一个实施例的自回传网络切换的方法的示意性流程图；
图4是根据本申请的一个实施例的自回传网络切换的方法的示意性流程图；
图5是根据本申请的一个实施例的自回传网络切换的方法的示意性流程图；
图6是根据本申请的一个实施例的自回传网络切换的装置的结构示意图；
图7是根据本申请的一个实施例的网络设备的结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请的说明书和权利要求书中的术语“第一”、“第二”等是用于区别类似的对象，而不用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便本申请的实施例能够以除了在这里图示或描述的那些以外的顺序实施。此外，说明书以及权利要求中“和/或”表示所连接对象的至少其中之一，字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请实施例中，用户设备(User Equipment，UE)可以包括但不限于移动台(Mobile Station，MS)、移动终端(Mobile Terminal)、移动电话(Mobile Telephone)、手机(handset)及便携设备(portable equipment)、车辆(vehicle)等，该UE可以经无线接入网(Radio Access Network，RAN)与一个或多个核心网进行通信，如，UE可由IAB网络节点提供无线接入服务等。可选地，UE可以是移动电话(或称为“蜂窝”电话)、具有无线通信功能的计算机等，终端设备还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置。
如图1所示，为本申请实施例提供的IAB***的CU-DU结构图，在一个自回传链路中，IAB网络(如图1中的IAB网络1)中的最上游的IAB网络节点中的DU均连接到一个CU网络，而该CU网络可通过F1-AP协议对DU进行配置，以及通过无线资源控制(Radio Resource Control，RRC)协议对MT进行配置。一个自回传链路中还包括一个宿主(Donor)IAB网络节点(或者被称为IAB Donor),该Donor IAB网络节点不具有MT功能部分，但Donor IAB网络节点具有与其直接相连的有线传输网。
实际应用中，以图1中所示的IAB网络1为例，该IAB网络1中可以包括图2所示的逐级连接的多个IAB网络节点(如图2中所示的IAB1、IAB2、IAB3……)，以及通过各IAB网络节点提供网络接入服务的UE(如图2中所示的UE1、UE2……)，其中，IAB网络节点IAB1为IAB网络1中的最上游IAB网络节点，网络节点IAB1为与其相邻的下游网络节点IAB2的父IAB网络节点、网络节点IAB2为与其相邻的下游网络节点IAB3的父IAB网络节点……，换言之，网络节点IAB2为与其相邻的上游网络节点IAB1的子IAB网络节点、网络节点IAB3为与其相邻的下游网络节点IAB2的子IAB网络节点。另外，一个IAB网络节点可以为一个或多个UE提供网络接入服务。
图3示出本申请一示例性实施例提供了一种自回传网络切换的方法300，该方法300可以由第一IAB网络节点执行，该第一IAB网络节点可以是待切换的IAB网络中的任一IAB网络节点，例如图2中的“IAB1、IAB2、IAB3……”。具体地，该方法300可以由安装在第一IAB网络节点中的软件或硬件执行，该 方法至少包括如下步骤。
S310，接收网络切换命令。
第一IAB网络节点接收网络切换命令。其中，网络切换命令至少可以包括第一网络切换命令和第二网络切换命令，第一网络切换命令用于指示将第一IAB网络节点由源CU网络切换至目标CU网络，第二网络切换命令用于指示将其他网络节点由源CU网络切换至目标CU网络，其他网络节点为待切换的IAB网络中第一IAB网络节点下游的网络节点，该网络节点可以是IAB网络节点或IAB网络节点所服务的UE。
作为一种实现方式，在第一IAB网络节点为待切换的IAB网络中的最上游的IAB网络节点(如图2中的IAB1)的情况下，本步骤具体包括第一IAB网络节点，即最上游的IAB网络节点(IAB1)接收源CU网络节点发送的网络切换命令，在一种实现方式中，该网络切换命令可以是由源CU网络节点在确定接收到目标CU网络节点为待切换的IAB网络中的网络节点生成的所有网络切换命令的情况下转发的。具体地，请结合参阅图2，源CU网络节点转发网络切换命令给第一IAB网络节点的过程可通过如下(1)-(3)实现。
(1)源CU网络为待切换的IAB网络中的所有网络节点(包括IAB网络节点以及IAB网络节点所服务的UE等)生成网络切换请求(Migration Request)发送给目标CU网络，其中，每个网络切换请求中包括各网络节点的上下文信息。
(2)在目标CU网络接收到源CU网络发送的网络切换请求后，可按照网络切换请求中携带的各网络节点的上下文信息，建立服务于待切换的IAB网络中的各网络节点的网络切换环境(包括DU和MT)，如建立承载、配置无线资源、配置回传通道等，以及生成对应于待切换的IAB网络中的各网络节点(包括IAB网络节点以及IAB网络节点所服务的UE)的网络切换命令，例如，包括分别对应于IAB1-3、UE1-2的5个网络切换命令，并将该网络切换命令发送给源CU网络。
(3)源CU网络在接收到网络切换命令后，将该网络切换命令发送给待切换的IAB网络中的最上游IAB网络节点。实际应用中，为了避免最上游IAB网络节点还没有收到所有网络切换命令就断掉与源CU网络之间的连接，导致网络切换失败，因此，源CU网络可在确定接收到目标CU网络为待切换的IAB网络中的网络节点生成的所有网络切换命令的情况下，再将网络切换命令转发给最上游IAB网络节点。例如，源CU网络在接收到分别对应于IAB1-3、UE1-2的共计5个网络切换命令之后，再将网络切换命令转发给最上游IAB网络节点。其中，网络切换命令的发送方式本实施例在此不做限制。
作为另一种实现方式，在第一IAB网络节点为待切换的IAB网络中除最上游的IAB网络节点之外的任一IAB网络节点的情况下，网络切换命令是由待切换的IAB网络中第一IAB网络节点的父IAB网络节点转发的。例如，在第一IAB网络节点为图2中所示的IAB2的情况下，网络切换命令是由IAB2的父IAB网络节点IAB1转发的，在第一IAB网络节点为IAB3的情况下，网 络切换命令是由IAB3的父IAB网络节点IAB2转发的。
S320，在根据第一网络切换命令将第一IAB网络节点切换至目标CU网络之后，将第二网络切换命令发送至第二IAB网络节点或第一IAB网络节点所服务的UE。
其中，第二IAB网络节点为第一IAB网络节点的子IAB网络节点。在一种实现方式中，在待切换的IAB网络中，前述的子IAB网络节点是指处于第一IAB网络节点下游并且与该第一IAB网络节点相邻的下一IAB网络节点，例如，请结合参阅图2，在第一IAB网络节点为图2中所示的IAB1时，第二IAB网络节点可以为图2中所示的IAB2，第一IAB网络节点所服务的UE可以如图2中所示的UE1；或者，在第一IAB网络节点为图2中所示的IAB2时，第二IAB网络节点可以为图2中所示的IAB3，第一IAB网络节点所服务的UE可以如图2中所示的UE2。
实际应用中，第一IAB网络节点根据第一网络切换命令进行网络切换，包括但不限于对DU的重配置、MT的重配置，以及与该第一IAB网络节点相关的S1-U(S1 for the user plane)或NG-U接口上的数据通道的切换等。应理解，NG-U为无线接入网(NG-RAN)和5G核心网(5GC)之间的用户面接口，其中，关于各部分的切换顺序等本实施例在此不做限制。
本实施例给出的前述的自回传网络切换的方法中，第一IAB网络节点在接收到网络切换命令的情况下，根据第一网络切换命令从源CU网络切换至目标CU网络之后，将用于指示第一IAB网络节点下游的网络节点由源CU网络切换至目标CU网络的第二网络切换命令发送至第二IAB网络节点或第一IAB网络节点所服务的UE。由此，第二网络切换命令是由第一IAB网络节点进行下发而不依赖于源CU网络，从而有效避免由于第一IAB网络节点在完成网络切换后与源CU网络断开连接，而导致的第二网络切换命令无法下发给下游IAB网络节点的问题，确保待切换的IAB网络切换流程能够顺利进行。
图4为本申请的另一个实施例提供的一种自回传网络切换的方法400，该方法400可以由第一IAB网络节点执行，该第一IAB网络节点可以是待切换的IAB网络中的任一IAB网络节点，例如图2中的“IAB1、IAB2、IAB3……”。具体地，该方法可以由安装在第一IAB网络节点中的软件或硬件执行，该方法包括如下步骤。
S410，接收网络切换命令。
本步骤可以与图3实施例步骤S310采用相同或类似的描述，对于重复部分不再赘述。
在本实施例中，网络切换命令可以是通过信令容器(message container)传输的。
具体来讲，源CU网络接收到目标CU网络发送的网络切换命令，可将网络切换命令存储至第一IAB网络节点能够识别的信令容器中，以供第一IAB网络节点能够通过该信令容器接收并识别第一网络切换命令和第二网络切换命令。例如，结合图2所示，源CU网络通过信令容器1传输IAB1对应的网 络切换命令，通过信令容器2传输IAB2对应的网络切换命令，通过信令容器3传输IAB3对应的网络切换命令，通过信令容器4传输UE1对应的网络切换命令，通过信令容器5传输UE2对应的网络切换命令。可选地，所述信令容器为F1-AP信令容器，或者RRC信令容器。
本实施例中采用信令容器实现网络切换命令的传输，能够提高第一IAB网络节点对网络切换命令的识别效率，同时还能确保第二网络切换命令传输过程的可靠性，避免命令丢失等问题发生。
S420，确定所述第一IAB网络节点已完成所述网络切换命令的接收。
本申请的一个或多个实现方式中，在第一IAB网络节点从源CU网络切换至目标CU网络之前，第一IAB网络节点可先确定已经接收到了源CU网络或父IAB网络节点发送的全部网络切换命令，由此使第一IAB网络节点能够将对应的第二网络切换命令全部下发给第二IAB网络节点或第一IAB网络节点所服务的UE，以指示第一IAB网络节点下游的网络节点顺利完成切换，同时避免第一网络节点下游的网络节点中的任意一个因第一IAB网络节点与源CU网络断开连接，而导致的第二网络切换命令无法下发给下游节点的问题。具体来讲，第一IAB网络节点可通过以下三种方式中的至少一种确定已经接收到源CU网络或父IAB网络节点发送的全部网络切换命令。
(1)接收到的网络切换命令的总数与信令容器中指示的网络切换命令的总数匹配。实际应用中，作为一种实现方式，信令容器中可指示有网络切换命令的第二数目，在接收到的网络切换命令(包括第一网络切换命令和第二网络切换命令)的第一数目与信令容器中所指示的第二数目相等的情况下，可判定网络切换命令接收完成。
此外，信令容器中还可指示有各网络切换命令的序号，那么在进行判定时，可同时对接收到的网络切换命令的总数和各网络切换命令对应的序号进行对比分析，并在二者均匹配时，判定网络切换命令接收完成。
应注意的是，在通过多个信令容器对多个网络切换命令进行对应传输时，可根据接收到的信令容器的数目或/和序号确定接收到的网络切换命令的总数或/和序号，本实施例对此不做限制。
(2)接收到的网络切换命令中包括预定网络切换命令，其中，预定网络切换命令可以为MT切换命令或DU切换命令。可以理解的是，由于在IAB网络中，该IAB网络可以包括多个IAB网络节点，而每个IAB网络节点可包括MT和DU，因此，预定网络切换命令可以为任意一预定IAB网络节点对应的预定网络切换命令，也即，MT切换命令或DU切换命令可以为任意一预定IAB网络节点对应的MT切换命令或DU切换命令，本实施例对此不做限制。
实际应用中，源CU网络或第一IAB网络节点的父IAB网络节点在进行网络切换命令发送时，可将前述的预定网络切换命令最后发送，由此，在第一IAB网络节点接收到预定网络切换命令时，即可判定源CU网络或父IAB网络节点发送的网络切换命令已经全部收到。
(3)接收到用于表征切换命令发送完成的通知消息。其中，通知消息可 以是源CU网络或父IAB网络节点在完成网络切换命令发送后发送给第一IAB网络节点的，以用于通知第一IAB网络节点所有网络切换命令已经发送完成，可以启动网络切换流程。
在前述给出的三种方式中，可以任意组合，例如，第一IAB网络节点可以根据前述三种方式中任一种或两种或三种来确定已经接收到了源CU网络或父IAB网络节点发送的全部网络切换命令，由此，确保待切换的IAB网络中的各网络节点均能够顺利切换至目标CU网络。
S430，确定第一IAB网络节点是否为命令转发终点。
在第一IAB网络节点不为命令转发终点的情况下，则执行后续步骤。
反之，在第一IAB网络节点为命令转发终点的情况下，第一IAB网络节点可直接执行根据第一网络切换命令从源CU网络切换至目标CU网络，而不对第二网络切换命令或信令容器进行缓存、转发。由此，能够避免对第二网络切换命令的无效存储和转发，避免了资源的浪费，提高网络切换效率。
在一种实现方式中，第一IAB网络节点可以但不限于根据网络切换命令中携带的路由标识(Routing ID)中的目的回传适配协议(Backhaul Adaptation Protocol，BAP)地址，确定第一IAB网络节点是否为命令转发终点。本实施例中基于目的BAP地址进行的前述判断，能够提高判断效率，确保判断结果的可靠性。
S440，通过DU缓存所述第二网络切换命令。
其中，本步骤在第一IAB网络节点在接收网络切换命令之后，在执行第一网络切换命令之前进行。在完成自身的切换后，能够将缓存的第二网络切换命令下发给下游的网络节点，如子IAB网络节点以及第一IAB网络节点所服务的UE等，以指示下游的网络节点进行网络切换。在一种实现方式中，缓存所述第二网络切换命令可以通过缓存对应信令容器的方式实现。
S450，根据所述第一网络切换命令将所述第一IAB网络节点切换至所述目标CU网络。
在一种实现方式中，本步骤可以包括MT重配和DU重配。
在另一种实现方式中，为了避免由于对第一IAB网络节点的DU进行重配后，导致第一IAB网络节点和由其服务的下游的网络节点(如第二IAB网络节点或第一IAB网络节点所服务的UE)的配置信息不匹配，进而导致第二网络切换命令无法下发给下游的网络节点，因此，本申请的一个或多个实施例中，第一IAB网络节点在根据第一网络切换命令由源CU网络切换至目标CU网络的过程可以包括：根据第一网络切换命令进行MT重配。
S460，在根据所述第一网络切换命令将所述第一IAB网络节点切换至所述目标CU网络之后，将所述第二网络切换命令发送至第二IAB网络节点或所述第一IAB网络节点所服务的UE。
本步骤可以与图3实施例步骤S320采用相同或类似的描述，对于重复部分不再赘述。
在S450中进行了MT重配而未进行DU重配的情况下，在S460之后，还 包括在确定发送完第二网络切换命令给第二IAB网络节点或第一IAB网络节点所服务的UE之后，根据第一网络切换命令对第一IAB网络节点进行DU重配，可以避免由于对第一IAB网络节点的DU进行重配后，导致第一IAB网络节点和由其服务的下游的网络节点(如第二IAB网络节点或第一IAB网络节点所服务的UE)的配置信息不匹配，进而导致第二网络切换命令无法下发给下游的网络节点。
S470，发送网络切换完成通知给所述目标CU网络。
第一IAB网络节点在确定发送完第二网络切换命令给第二IAB网络节点之后，还可发送网络切换完成通知给目标CU网络，以通知目标CU网络第一IAB网络节点的切换已经完成，并且使得目标CU网络可以通知源CU网络，第一IAB网络节点的切换已经完成，源CU网络可以删除关于第一IAB网络节点的上下文信息以及相关配置。
本实施例给出的前述的自回传网络切换的方法中，第一IAB网络节点在接收到网络切换命令后，先将用于指示下游网络节点进行网络切换的第二网络切换命令进行缓存，在第一IAB网络节点切换至目标CU网络之后，再将第二网络切换命令发送至第二IAB网络节点或第一IAB网络节点所服务的UE，由此，第二网络切换命令是由第一IAB网络节点进行下发而不依赖于源CU网络，从而有效避免由于第一IAB网络节点在完成网络切换后与源CU网络断开连接，而导致的第二网络切换命令无法下发给下游IAB网络节点的问题，确保待切换的IAB网络切换流程能够顺利进行。
图5为本申请的另一个实施例提供的一种自回传网络切换的方法500，该方法500可以由第一IAB网络节点执行，该第一IAB网络节点可以是待切换的IAB网络中的任一IAB网络节点，例如图2中的IAB1、IAB2、IAB3……IABn，以及UE1、UE2……UEn。具体地，该方法可以由安装在第一IAB网络节点中的软件或硬件执行，该方法包括如下步骤。
S511，IAB1接收网络切换命令。
IAB1作为本步骤中的第一IAB网络节点，参照图2，IAB1作为待切换的IAB网络中最上游的IAB网络节点，其下游的网络节点为其他网络节点，包括：IAB2、IAB3、以及UE1、UE2。IAB1从源CU网络节点接收网络切换命令，所述网络切换命令包括第一网络切换命令和第二网络切换命令。例如，可以包括通过信令容器1传输的指示IAB1进行网络切换的网络切换命令a，通过信令容器2的传输指示IAB2进行网络切换的网络切换命令b，通过信令容器3传输的指示IAB3进行网络切换的网络切换命令c，通过信令容器4传输的UE1对应的网络切换命令d，通过信令容器5传输的UE2对应的网络切换命令e。网络切换命令a可以作为本步骤中的第一网络切换命令，而网络切换命令b-e可以作为本步骤中的第二网络切换命令。
本步骤的具体实现过程可参照前述S310、S410对应部分的描述，对于重复部分在此不再赘述。
S512，IAB1确定其完成所述网络切换命令的接收。
本步骤的具体实现过程可参照前述S420对应部分的描述，在此不再赘述。
S513，确定IAB1是否为命令转发终点。
本步骤的具体实现过程可参照前述S430对应部分的描述，在此不再赘述。在本实施例中，IAB1并非命令转发终点，因此执行以下步骤。
S514，IAB1通过DU缓存所述第二网络切换命令。
IAB1通过DU缓存网络切换命令b-e，可选地，可以缓存对应的信令容器2-5。本步骤的具体实现过程可参照前述S440对应部分的描述，在此不再赘述。
S515，根据网络切换命令a将IAB1由源CU网络切换至目标CU网络。
本步骤的具体实现过程可参照前述S450对应部分的描述，在此不再赘述。
S516，在根据网络切换命令a将IAB1切换至所述目标CU网络之后，将所述第二网络切换命令发送至第二IAB网络节点或所述第一IAB网络节点所服务的UE。
在一种实现方式中，在将所述第二网络切换命令发送至所述第二IAB网络节点的情况下，所述第二网络切换命令是通过所述信令容器传输的。例如，在IAB1将网络切换命令b-e发送至IAB2的情况下，所述网络切换命令b-e是通过信令容器传输的，即传输对应的信令容器2-5。
在一种实现方式中，在将所述第二网络切换命令发送至所述第一IAB网络节点所服务的UE的情况下，可以读取所述信令容器中的所述第二网络切换命令并发送给所述UE。例如，在IAB1将所述第二网络切换命令发送至其所服务的UE1的情况下，IAB1读取所述信令容器中UE1对应的第二网络切换命令d，并将读取的第二网络切换命令d发送给UE1。相应地，UE1接收第二网络切换命令d后，根据网络切换命令d将由源CU网络切换至目标CU网络。
对应于S516，IAB2接收网络切换命令。
在此情况下，IAB2作为接收网络切换命令的第一IAB网络节点，此时其下游的网络节点为其他网络节点，包括：IAB3、以及UE2。参照图2，在待切换的IAB网络中IAB2作为IAB1的子节点，其从IAB1接收网络切换命令b-e，所述网络切换命令b-e包括第一网络切换命令b和第二网络切换命令c、d、e。例如，可以包括通过信令容器2的传输IAB2对应的网络切换命令b，通过信令容器3传输的IAB3对应的网络切换命令c，通过信令容器4传输的UE1对应的网络切换命令d，通过信令容器5传输的UE2对应的网络切换命令e。网络切换命令b可以作为本步骤中的第一网络切换命令，而网络切换命令c、d、e可以作为本步骤中的第二网络切换命令。
本步骤的具体实现过程可参照前述S310、S410对应部分的描述，对于重复部分在此不再赘述。
S522，IAB2确定其完成所述网络切换命令的接收。
本步骤的具体实现过程可参照前述S420对应部分的描述，在此不再赘述。
S523，确定IAB2是否为命令转发终点。
本步骤的具体实现过程可参照前述S430对应部分的描述，在此不再赘述。在本实施例中，IAB2并非命令转发终点，因此执行以下步骤。
S524，IAB2通过DU缓存所述第二网络切换命令。
IAB2通过DU缓存网络切换命令b-e，可选地，可以缓存对应的信令容器3-5。本步骤的具体实现过程可参照前述S440对应部分的描述，在此不再赘述。
S525，根据网络切换命令b将IAB2由源CU网络切换至目标CU网络。
本步骤的具体实现过程可参照前述S450对应部分的描述，在此不再赘述。
S526，在根据所述第一网络切换命令将所述第一IAB网络节点切换至所述目标CU网络之后，将所述第二网络切换命令发送至第二IAB网络节点或所述第一IAB网络节点所服务的UE。
在一种实现方式中，在将所述第二网络切换命令发送至所述第二IAB网络节点的情况下，所述第二网络切换命令是通过所述信令容器传输的。例如，在IAB2将网络切换命令c-e发送至IAB3的情况下，所述网络切换命令c-e是通过信令容器传输的，即传输对应的信令容器3-5。
在一种实现方式中，在将所述第二网络切换命令发送至所述第一IAB网络节点所服务的UE的情况下，可以读取所述信令容器中的所述第二网络切换命令并发送给所述UE。例如，在IAB2将所述第二网络切换命令发送至其所服务的UE2的情况下，IAB2读取所述信令容器中UE2对应的第二网络切换命令e，并将读取的第二网络切换命令e发送给UE2。相应地，UE2接收第二网络切换命令e后，根据网络切换命令e将由源CU网络切换至目标CU网络。
对应于S526，IAB3接收网络切换命令。
此时，IAB3作为本步骤中接收网络切换命令的第一IAB网络节点，参照图2，在待切换的IAB网络中IAB3作为IAB2的子节点，其从IAB2接收网络切换命令c-e，所述网络切换命令c-e包括第一网络切换命令c和第二网络切换命令d、e。例如，可以包括通过信令容器3传输的IAB3对应的网络切换命令c，通过信令容器4传输的UE1对应的网络切换命令d，通过信令容器5传输的UE2对应的网络切换命令e。网络切换命令c可以作为本步骤中的第一网络切换命令，而网络切换命令d、e可以作为本步骤中的第二网络切换命令。
本步骤的具体实现过程可参照前述S310、S410对应部分的描述，对于重复部分在此不再赘述。
S532，IAB3确定其完成所述网络切换命令的接收。
本步骤的具体实现过程可参照前述S430对应部分的描述，在此不再赘述。
S533，确定IAB3是否为命令转发终点。
本步骤的具体实现过程可参照前述S430对应部分的描述，在此不再赘述。在本实施例中，IAB3为命令转发终点，因此执行以下步骤。
S534，根据网络切换命令c将IAB3由源CU网络切换至目标CU网络。
因IAB3为命令转发终点无需执行缓存切换命令的操作。
本实施例以待切换的IAB网络中存在5个节点，即IAB1、2、3、UE1、2为例进行说明，但本领域技术人员可以在不付出创造性劳动的情况下将本实施例所述的技术方案应用于具有任意节点个数的IAB网络中。
需要说明的是，本申请实施例提供的自回传网络切换的方法，执行主体可 以为自回传网络切换的装置，或者该装置中的用于执行加载上述方法的控制模块。本申请实施例中以自回传网络切换的装置执行加载自回传网络切换的方法为例，说明本申请实施例提供的自回传网络切换的方法。
图6是根据本申请一实施例的自回传网络切换的装置600的结构示意图，该自回传网络切换的装置600可以为第一IAB网络节点或者应用于第一IAB网络节点，如图6所示，自回传网络切换的装置600至少包括接收模块610和处理模块620。
接收模块610，用于接收网络切换命令，其中，所述网络切换命令包括第一网络切换命令和第二网络切换命令，所述第一网络切换命令用于指示将所述第一IAB网络节点由源CU网络切换至目标CU网络，所述第二网络切换命令用于指示将其他网络节点由源CU网络切换至目标CU网络，所述其他网络节点为待切换的IAB网络中所述第一IAB网络节点下游的网络节点；处理模块620，用于在根据所述第一网络切换命令将所述第一IAB网络节点切换至所述目标CU网络之后，将所述第二网络切换命令发送至第二IAB网络节点或所述第一IAB网络节点所服务的UE，所述第二IAB网络节点为所述第一IAB网络节点的子IAB网络节点。
本申请的一个或多个实施例中，所述处理模块620还用于通过DU缓存所述第二网络切换命令。
本申请的一个或多个实施例中，所述网络切换命令是源CU网络节点在确定接收到目标CU网络节点为所述待切换的IAB网络中的网络节点生成的所有网络切换命令的情况下转发的；或者由所述待切换的IAB网络中所述第一IAB网络节点的父IAB网络节点转发的。
本申请的一个或多个实施例中，所述网络切换命令是通过信令容器传输的。
本申请的一个或多个实施例中，所述处理模块620用于在将所述第二网络切换命令发送至所述第二IAB网络节点的情况下，所述第二网络切换命令是通过所述信令容器传输的；以及在将所述第二网络切换命令发送至所述第一IAB网络节点所服务的UE的情况下，读取所述信令容器中的所述第二网络切换命令并发送给所述UE。
本申请的一个或多个实施例中，所述信令容器为F1-AP信令容器，或者RRC信令容器。
本申请的一个或多个实施例中，所述处理模块620用于在所述第一IAB网络节点不为命令转发终点的情况下，对所述信令容器进行缓存，以及调用所述处理模块620执行所述在根据所述第一网络切换命令将所述第一IAB网络节点切换至所述目标CU网络之后，将所述第二网络切换命令发送至第二IAB网络节点或所述第一IAB网络节点所服务的UE的步骤。
本申请的一个或多个实施例中，所述处理模块620用于根据所述网络切换命令中携带的路由标识中的目的BAP地址，确定所述第一IAB网络节点是否为命令转发终点。
本申请的一个或多个实施例中，所述处理模块620用于通过以下方式中的 至少一种，确定所述第一IAB网络节点完成所述网络切换命令的接收，其中，所述以下方式包括：接收到的所述网络切换命令的总数与所述信令容器中指示的网络切换命令的总数匹配；接收到的所述网络切换命令中包括预定网络切换命令，其中，所述预定网络切换命令为MT切换命令或DU切换命令；接收到用于表征切换命令发送完成的通知消息。
本申请的一个或多个实施例中，所述处理模块620用于根据所述第一网络切换命令进行MT重配；以及在确定发送完所述第二网络切换命令给所述第二IAB网络节点之后，根据所述第一网络切换命令对所述第一IAB网络节点进行DU重配。
本申请的一个或多个实施例中，所述处理模块620还用于发送网络切换完成通知给所述目标CU网络。
根据本发明实施例的终端设备600可以参照对应本发明实施例的方法300-400的流程，并且，该终端设备600中的各个单元/模块和上述其他操作和/或功能分别为了实现方法300-400中的相应流程，并且能够达到相同或等同的技术效果，为了简洁，在此不再赘述。
请参阅图7，图7是本申请实施例提供的应用自回传网络切换的方法的网络设备的结构图，能够实现方法实施例的细节，如方法300或方法400的步骤，并达到相同的效果。
如图7所示，网络设备700包括：处理器701、收发机702、存储器703和总线接口，其中：
在本申请实施例中，网络设备700还包括：存储在存储器上703并可在处理器701上运行的程序或指令，该程序或指令被处理器701执行时可实现上述自回传网络切换的方法实施例的各个过程，如方法300或方法400的步骤，且能达到相同的技术效果，为避免重复，这里不再赘述。
在图7中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器701代表的一个或多个处理器和存储器703代表的存储器的各种电路链接在一起。总线架构还可以将诸如***设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机702可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元。
处理器701负责管理总线架构和通常的处理，存储器703可以存储处理器901在执行操作时所使用的数据。
本申请实施例还提供一种可读存储介质，所述可读存储介质上存储有程序或指令，该程序或指令被处理器执行时实现上述自回传网络切换的方法实施例300-400的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
其中，所述处理器为上述实施例中所述的电子设备中的处理器。所述可读存储介质，包括计算机可读存储介质，如计算机只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等。
本申请实施例另提供了一种芯片，所述芯片包括处理器和通信接口，所述 通信接口和所述处理器耦合，所述处理器用于运行程序或指令，实现上述自回传网络切换的方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
应理解，本申请实施例提到的芯片还可以称为***级芯片、***芯片、芯片***或片上***芯片等。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。此外，需要指出的是，本申请实施方式中的方法和装置的范围不限按示出或讨论的顺序来执行功能，还可包括根据所涉及的功能按基本同时的方式或按相反的顺序来执行功能，例如，可以按不同于所描述的次序来执行所描述的方法，并且还可以添加、省去、或组合各种步骤。另外，参照某些示例所描述的特征可在其他示例中被组合。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端(可以是手机，计算机，服务器，空调器，或者网络设备等)执行本申请各个实施例所述的方法。
上面结合附图对本申请的实施例进行了描述，但是本申请并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本申请的启示下，在不脱离本申请宗旨和权利要求所保护的范围情况下，还可做出很多形式，均属于本申请的保护之内。

Claims (26)

  1. 一种自回传网络切换的方法，应用于第一接入回传一体化IAB网络节点，所述方法包括：
    接收网络切换命令，其中，所述网络切换命令包括第一网络切换命令和第二网络切换命令，所述第一网络切换命令用于指示将所述第一IAB网络节点由源集中式单元CU网络切换至目标CU网络，所述第二网络切换命令用于指示将其他网络节点由源CU网络切换至目标CU网络，所述其他网络节点为待切换的IAB网络中所述第一IAB网络节点下游的网络节点；
    在根据所述第一网络切换命令将所述第一IAB网络节点切换至所述目标CU网络之后，将所述第二网络切换命令发送至第二IAB网络节点或所述第一IAB网络节点所服务的用户设备UE，所述第二IAB网络节点为所述第一IAB网络节点的子IAB网络节点。
  2. 根据权利要求1所述的自回传网络切换的方法，其中，所述接收网络切换命令之后，所述方法还包括：
    通过分布式单元DU缓存所述第二网络切换命令。
  3. 根据权利要求1所述的自回传网络切换的方法，其中，所述网络切换命令是源CU网络节点在确定接收到目标CU网络节点为所述待切换的IAB网络中的网络节点生成的所有网络切换命令的情况下转发的；或者
    由所述待切换的IAB网络中所述第一IAB网络节点的父IAB网络节点转发的。
  4. 根据权利要求1所述的自回传网络切换的方法，其中，所述网络切换命令是通过信令容器传输的。
  5. 根据权利要求4所述的自回传网络切换的方法，其中，所述将所述第二网络切换命令发送至第二IAB网络节点或所述第一IAB网络节点所服务的UE，包括：
    在将所述第二网络切换命令发送至所述第二IAB网络节点的情况下，所述 第二网络切换命令是通过所述信令容器传输的；
    在将所述第二网络切换命令发送至所述第一IAB网络节点所服务的UE的情况下，读取所述信令容器中的所述第二网络切换命令并发送给所述UE。
  6. 根据权利要求4或5所述的自回传网络切换的方法，其中，所述信令容器为F1-AP信令容器，或者无线资源控制RRC信令容器。
  7. 根据权利要求4所述的自回传网络切换的方法，其中，所述接收网络切换命令之后，所述方法还包括：
    在所述第一IAB网络节点不为命令转发终点的情况下，对所述信令容器进行缓存，以及执行所述在根据所述第一网络切换命令将所述第一IAB网络节点切换至所述目标CU网络之后，将所述第二网络切换命令发送至第二IAB网络节点或所述第一IAB网络节点所服务的UE的步骤。
  8. 根据权利要求7所述的自回传网络切换的方法，其中，所述接收网络切换命令之后，所述方法还包括：
    根据所述网络切换命令中携带的路由标识中的目的BAP地址，确定所述第一IAB网络节点是否为命令转发终点。
  9. 根据权利要求4所述的自回传网络切换的方法，其中，在所述接收网络切换命令之后，所述方法还包括：
    通过以下方式中的至少一种，确定所述第一IAB网络节点完成所述网络切换命令的接收，其中，所述以下方式包括：
    接收到的所述网络切换命令的总数与所述信令容器中指示的网络切换命令的总数匹配；
    接收到的所述网络切换命令中包括预定网络切换命令，其中，所述预定网络切换命令为移动终端MT切换命令或DU切换命令；
    接收到用于表征切换命令发送完成的通知消息。
  10. 根据权利要求1所述的自回传网络切换的方法，其中，所述将所述第一IAB网络节点切换至所述目标CU网络，包括：根据所述第一网络切换命令进 行MT重配；以及
    在确定发送完所述第二网络切换命令给所述第二IAB网络节点之后，所述方法还包括：
    根据所述第一网络切换命令对所述第一IAB网络节点进行DU重配。
  11. 根据权利要求10所述的自回传网络切换的方法，其中，所述在确定发送完所述第二网络切换命令给所述第二IAB网络节点之后，所述方法还包括：
    发送网络切换完成通知给所述目标CU网络。
  12. 一种自回传网络切换的装置，所述装置包括：
    接收模块，用于接收网络切换命令，其中，所述网络切换命令包括第一网络切换命令和第二网络切换命令，所述第一网络切换命令用于指示将所述第一接入回传一体化IAB网络节点由源集中式单元CU网络切换至目标CU网络，所述第二网络切换命令用于指示将其他网络节点由源CU网络切换至目标CU网络，所述其他网络节点为待切换的IAB网络中所述第一IAB网络节点下游的网络节点；
    处理模块，用于在根据所述第一网络切换命令将所述第一IAB网络节点切换至所述目标CU网络之后，将所述第二网络切换命令发送至第二IAB网络节点或所述第一IAB网络节点所服务的用户设备UE，所述第二IAB网络节点为所述第一IAB网络节点的子IAB网络节点。
  13. 根据权利要求12所述的自回传网络切换的装置，其中，所述处理模块还用于通过分布式单元DU缓存所述第二网络切换命令。
  14. 根据权利要求12所述的自回传网络切换的装置，其中，所述网络切换命令是源CU网络节点在确定接收到目标CU网络节点为所述待切换的IAB网络中的网络节点生成的所有网络切换命令的情况下转发的；或者
    由所述待切换的IAB网络中所述第一IAB网络节点的父IAB网络节点转发的。
  15. 根据权利要求12所述的自回传网络切换的装置，其中，所述网络切换 命令是通过信令容器传输的。
  16. 根据权利要求15所述的自回传网络切换的装置，其中，在将所述第二网络切换命令发送至所述第二IAB网络节点的情况下，所述第二网络切换命令是通过所述信令容器传输的；以及在将所述第二网络切换命令发送至所述第一IAB网络节点所服务的UE的情况下，所述处理模块用于读取所述信令容器中的所述第二网络切换命令并发送给所述UE。
  17. 根据权利要求15或16所述的自回传网络切换的装置，其中，所述信令容器为F1-AP信令容器，或者无线资源控制RRC信令容器。
  18. 根据权利要求15所述的自回传网络切换的装置，其中，所述处理模块用于在所述第一IAB网络节点不为命令转发终点的情况下，对所述信令容器进行缓存，以及调用所述处理模块执行所述在根据所述第一网络切换命令将所述第一IAB网络节点切换至所述目标CU网络之后，将所述第二网络切换命令发送至第二IAB网络节点或所述第一IAB网络节点所服务的UE的步骤。
  19. 根据权利要求18所述的自回传网络切换的装置，其中，所述处理模块用于根据所述网络切换命令中携带的路由标识中的目的BAP地址，确定所述第一IAB网络节点是否为命令转发终点。
  20. 根据权利要求15所述的自回传网络切换的装置，其中，所述接收模块用于通过以下方式中的至少一种，确定所述第一IAB网络节点完成所述网络切换命令的接收，其中，所述以下方式包括：
    接收到的所述网络切换命令的总数与所述信令容器中指示的网络切换命令的总数匹配；
    接收到的所述网络切换命令中包括预定网络切换命令，其中，所述预定网络切换命令为移动终端MT切换命令或DU切换命令；
    接收到用于表征切换命令发送完成的通知消息。
  21. 根据权利要求20所述的自回传网络切换的装置，其中，所述处理模块用于根据所述第一网络切换命令进行MT重配；以及在确定发送完所述第二网 络切换命令给所述第二IAB网络节点之后，根据所述第一网络切换命令对所述第一IAB网络节点进行DU重配。
  22. 根据权利要求21所述的自回传网络切换的装置，其中，所述处理模块还用于发送网络切换完成通知给所述目标CU网络。
  23. 一种网络设备，包括处理器，存储器及存储在所述存储器上并可在所述处理器上运行的程序或指令，所述程序或指令被所述处理器执行时实现如权利要求1-11所述的自回传网络切换的方法的步骤。
  24. 一种可读存储介质，所述可读存储介质上存储程序或指令，所述程序或指令被处理器执行时实现如权利要求1-11所述的自回传网络切换的方法的步骤。
  25. 一种计算机程序产品，所述计算机程序产品被至少一个处理器执行以实现如权利要求1至11中任一项所述的自回传网络切换的方法。
  26. 一种网络设备，所述用户设备被配置为用于执行如权利要求1至11中任一项所述的自回传网络切换的方法的步骤。
PCT/CN2021/097495 2020-06-01 2021-05-31 自回传网络切换的方法、装置和网络设备 WO2021244498A1 (zh)

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