WO2021244605A1 - 网络切换方法、装置、通信设备及系统 - Google Patents

网络切换方法、装置、通信设备及系统 Download PDF

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Publication number
WO2021244605A1
WO2021244605A1 PCT/CN2021/098101 CN2021098101W WO2021244605A1 WO 2021244605 A1 WO2021244605 A1 WO 2021244605A1 CN 2021098101 W CN2021098101 W CN 2021098101W WO 2021244605 A1 WO2021244605 A1 WO 2021244605A1
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network
node
iab
iab node
target
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PCT/CN2021/098101
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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 JP2022572377A priority Critical patent/JP2023527196A/ja
Priority to KR1020227040242A priority patent/KR20230005233A/ko
Priority to EP21818853.0A priority patent/EP4164294A4/en
Publication of WO2021244605A1 publication Critical patent/WO2021244605A1/zh
Priority to US18/073,273 priority patent/US20230098159A1/en

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    • 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
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/38—Reselection control by fixed network equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • 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

Definitions

  • This application belongs to the field of communication technology, and specifically relates to a network switching method, device, communication equipment, and system.
  • An integrated access backhaul (IAB) system includes a distributed unit (DU) function part and a mobile terminal (mobile termination, MT) function part.
  • DU distributed unit
  • MT mobile terminal
  • the DUs of all IAB nodes are connected to a centralized unit (CU) node, and the CU node performs DU and MT configuration.
  • CU centralized unit
  • an IAB network for example, including the IAB1 node, downstream nodes of the IAB1 node, and user equipment (UE), etc.
  • the source network that is, the network controlled by the source CU
  • the target network that is, the network controlled by the target CU
  • the source CU cannot send a switch to the downstream node to be switched after the IAB node switch is completed Command, so the downstream node cannot switch to the target network.
  • the purpose of the embodiments of this application is to provide a network switching method, device, communication equipment and system, which can solve the problem that when a to-be-switched IAB network is switched from the source network to the target network, downstream nodes cannot switch to the target network in time. problem.
  • a network switching method which is applied to the first IAB node in the IAB network to be switched, and the network switching method includes: in the case where the target switching command has been sent to the target network node, according to the received The received first handover command executes the handover process of the first IAB node.
  • the target network node is a sub-IAB node downstream of the first IAB node in the IAB network or a UE served by the first IAB node
  • the target switching command includes switching commands corresponding to all network nodes downstream of the first IAB node in the IAB network
  • the first handover command is a handover command corresponding to the first IAB node.
  • a network switching method which is applied to a source CU, and the network switching method includes: sending a first switching command and a target switching command to a first IAB node in the IAB network to be switched, the first switching command is The switching command corresponding to the first IAB node, and the target switching command includes the switching commands corresponding to all network nodes downstream of the first IAB node in the IAB network.
  • the first handover command is used for the first IAB node to execute the handover process of the first IAB node when the first IAB node has finished sending the target handover command to the target network node, and the target network node is the downstream of the first IAB node in the IAB network.
  • a network switching device in a third aspect, includes an execution module.
  • the execution module is configured to execute the switching process of the first IAB node in the IAB network to be switched according to the first switching command that has been received when the target switching command has been sent to the target network node.
  • the target network node is a sub-IAB node downstream of the first IAB node in the IAB network or a UE served by the first IAB node
  • the target switching command includes switching commands corresponding to all network nodes downstream of the first IAB node in the IAB network
  • the first handover command is a handover command corresponding to the first IAB node.
  • a network switching device in a fourth aspect, includes a sending module.
  • the sending module is used to send a first switching command and a target switching command to the first IAB node in the IAB network to be switched, the first switching command is a switching command corresponding to the first IAB node, and the target switching command includes the IAB network Handover commands corresponding to all network nodes downstream of the first IAB node.
  • the first handover command is used for the first IAB node to execute the handover process of the first IAB node when the first IAB node has finished sending the target handover command to the target network node, and the target network node is the downstream of the first IAB node in the IAB network.
  • an IAB node in a fifth aspect, includes a processor, a memory, and a program or instruction that is stored on the memory and can run on the processor.
  • the program or instruction is executed by the processor. When executed, the steps of the network switching method as described in the first aspect are realized.
  • a CU in a sixth aspect, includes a processor, a memory, and a program or instruction that is stored on the memory and can run on the processor.
  • the program or instruction When the program or instruction is executed by the processor, Implement the steps of the network handover method as described in the second aspect.
  • a communication system in a seventh aspect, includes the network switching device according to the third aspect and the network switching device according to the fourth aspect; or, the communication system includes the network switching device according to the fifth aspect The IAB node and the CU as described in the sixth aspect.
  • a readable storage medium is provided, and a program or instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the steps of the network switching method as described in the first aspect are implemented, or Implement the steps of the network handover method as described in the second aspect.
  • a chip in a ninth aspect, 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 network as described in the first aspect Switching method, or implementing the network switching method as described in the second aspect.
  • the first IAB node executes the switching process of the first IAB node according to the received first switching command. Since the first IAB node does not execute the handover process of the first IAB node until it has determined that it has completed sending the corresponding handover command to the downstream network node, it can avoid that the first IAB node has not finished forwarding the handover command of the downstream network node.
  • the network switch is performed, which results in the problem that the switch command cannot be sent to the downstream network node, thereby ensuring that the downstream network node can switch to the target network in time.
  • FIG. 1 is a schematic diagram of the architecture of an IAB system provided by an embodiment of this application.
  • Figure 2 is a schematic structural diagram of a source CU network switching to a target CU network provided by an embodiment of the application;
  • FIG. 3 is a schematic diagram of the CU-DU structure of an IAB system provided by an embodiment of the application.
  • FIG. 4 is one of the schematic diagrams of a network switching method provided by an embodiment of this application.
  • FIG. 5 is the second schematic diagram of a network handover method provided by an embodiment of this application.
  • FIG. 6 is the third schematic diagram of a network handover method provided by an embodiment of this application.
  • FIG. 7 is the fourth schematic diagram of a network handover method provided by an embodiment of this application.
  • FIG. 8 is a fifth schematic diagram of a network handover method provided by an embodiment of this application.
  • FIG. 9 is one of the schematic structural diagrams of a network switching device provided by an embodiment of this application.
  • FIG. 10 is the second structural diagram of a network switching device provided by an embodiment of this application.
  • FIG. 11 is the third structural diagram of a network switching device provided by an embodiment of this application.
  • FIG. 12 is the fourth structural diagram of a network switching device provided by an embodiment of this application.
  • FIG. 13 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 14 is a schematic diagram of hardware of an IAB node provided by an embodiment of the application.
  • FIG. 15 is a schematic diagram of hardware of a CU provided by an embodiment of the application.
  • first and second in the specification and claims of this application are used to distinguish similar objects, but not to describe a specific sequence or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first” and “second” It is usually one type, and the number of objects is not limited.
  • the first object may be one or more.
  • “and/or” in the description and claims means at least one of the connected objects, and the character “/” generally means that the associated objects before and after are in an "or” relationship.
  • FIG. 1 shows a schematic diagram of the architecture of an IAB system.
  • An IAB node includes a DU functional part and an MT functional part. Relying on MT, an access point (ie IAB node) can find an upstream access point (parent IAB node) and establish a wireless connection with the DU of the upstream access point. This wireless connection is called a wireless backhaul link (backhaul). link).
  • backhaul wireless backhaul link
  • the IAB node turns on its DU function, and the DU provides cell services, that is, the DU can provide access services for user equipment (UE).
  • UE user equipment
  • a self-backhauling loop includes a donor IAB node (or IAB donor), and the donor IAB node has a wired transmission network directly connected.
  • IAB donor or IAB donor
  • the introduction of the IAB system is to solve the situation that the wired transmission network is not in place when the access points are densely deployed. That is, when there is no wired transmission network, the access point can rely on wireless backhaul.
  • the UE can also be called a terminal device.
  • the UE can be a mobile phone, a tablet (Personal Computer), a laptop (Laptop Computer) or a laptop, a personal digital assistant (PDA), a handheld computer, or a netbook.
  • Ultra-mobile personal computer UMPC
  • mobile Internet device Mobile Internet Device, MID
  • wearable device Wearable Device
  • vehicle-mounted device VUE
  • PUE pedestrian terminal
  • Wearable devices include: bracelets, earphones, glasses, etc. It should be noted that the embodiments of this application do not limit the specific type of UE.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-Advanced
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single-carrier Frequency-Division Multiple Access
  • system and “network” in the embodiments of the present application are often used interchangeably, and the described technology can be used for the aforementioned systems and radio technologies as well as other systems and radio technologies.
  • NR New Radio
  • 6G 6th Generation
  • FIG. 2 shows a schematic diagram of the structure of an IAB network to be switched from a source CU network to a target CU network.
  • the IAB network includes IAB node 1, all downstream nodes (for example, IAB node 2), UEs (for example, UE 1 and UE 2), and so on.
  • the donor IAB nodes corresponding to the source CU network include CU 1 and DU
  • the target donor IAB nodes corresponding to the target CU network include CU 2 and DU.
  • the source CU may send handover commands of various nodes to the IAB node 1, so that the IAB node 1 forwards the handover commands of downstream nodes (for example, the IAB node 2 and the UE).
  • Figure 3 shows a schematic diagram of the CU-DU structure of an IAB system.
  • the DUs of all IAB nodes are connected to a CU node, and this node configures the DU through F1 layer application protocol (F1-Application Protocol, F1-AP) signaling.
  • the CU configures the MT through RRC signaling.
  • the donor IAB node has no MT function part.
  • the network switching method may include the following steps 201 and 202.
  • Step 201 The first IAB node determines whether it has completed sending the target switching command to the target network node.
  • Step 202 In the case where the target switching command has been sent to the target network node, the first IAB node executes the switching process of the first IAB node according to the received first switching command.
  • the above-mentioned first IAB node is any IAB node in the IAB network to be handed over.
  • the aforementioned target network node is a sub-IAB node downstream of the first IAB node in the IAB network or a UE served by the first IAB node, and the target switching command includes switching commands corresponding to all network nodes downstream of the first IAB node in the IAB network,
  • the first handover command is a handover command corresponding to the first IAB node.
  • the IAB network to be handed over includes multiple network nodes to be handed over, and the multiple network nodes may be multiple IAB nodes, or include at least one IAB node and UE.
  • the foregoing first IAB node may be the most upstream network node in the IAB network, or the foregoing first IAB node may be any downstream IAB node in the IAB network.
  • the target switching command is a switching command other than the first switching command among all switching commands, and all switching commands are all networks in the IAB network
  • the first IAB node is any downstream IAB node in the IAB network, which can be understood as:
  • the first IAB node is any IAB node downstream of the most upstream IAB node (that is, the most upstream network node in the IAB network) .
  • the aforementioned target network node may be an IAB node in the IAB network, or may also be a UE in the IAB network.
  • the above-mentioned first handover command is directly sent by the source CU to the first IAB node.
  • the above-mentioned target switching command is also directly sent by the source CU to the first IAB node.
  • the above-mentioned first handover command is forwarded by the source CU to the network node upstream of the first IAB node Of the first IAB node.
  • the above-mentioned target switching command is also forwarded by the source CU to the first IAB node through the network node upstream of the first IAB node.
  • the source CU may generate corresponding handover request messages for all network nodes in the IAB network to be handed over, and combine these handover request messages (each handover request message contains the context information of the corresponding network node to be handed over). ) Is sent to the target CU.
  • the target CU After receiving the handover request message of each network node to be handed over, the target CU establishes an environment to serve each network node to be handed over according to the context information carried in the handover request message, for example, including the establishment of bearer, configuration Wireless resources and configuration backhaul channels, etc., and then the target CU can generate switching commands for each network node to be switched, and send these switching commands to the source CU, so that the source CU receives all of the IAB networks to be switched After the switching command corresponding to the network node, the switching command corresponding to all network nodes can be forwarded to the IAB network (that is, each network node in the IAB network).
  • the IAB network that is, each network node in the IAB network.
  • the foregoing first IAB node is the most upstream network node in the IAB network.
  • the network handover method provided by the embodiment of the present application further includes the following steps 301 to 304.
  • Step 301 The source CU preferentially sends a target switching command to the first IAB node.
  • the source CU may preferentially send the switching commands (ie target switching commands) of all downstream network nodes (network nodes other than the most upstream IAB node in the IAB network) to the IAB node on the most upstream in the IAB network , So that the most upstream IAB node can preferentially send the target switching command to a downstream network node (for example, a child IAB node or a UE served by the first IAB node).
  • a downstream network node for example, a child IAB node or a UE served by the first IAB node.
  • Step 302 The first IAB node receives the target switching command sent by the source CU, and sends the target switching command to the target network node.
  • Step 303 The source CU sends the first handover command to the first IAB node.
  • Step 304 The first IAB node receives the first handover command sent by the source CU.
  • the source CU uses a method of different sending order to send the handover command, so that an IAB node in the IAB network to be handed over confirms that the handover command forwarded to all downstream nodes has been successfully forwarded.
  • the source CU first sends the handover commands of all downstream nodes of the IAB node, and finally sends the handover commands belonging to the IAB node; when the IAB node receives its own handover commands, it determines that all the handover commands belonging to the downstream nodes have been After sending, you can start your own switching process.
  • This method does not require the handover IAB node to determine whether the handover commands of all downstream IAB nodes have been sent, and there is no need to define new signaling.
  • the most upstream IAB node sends its own handover to the most upstream IAB node after finishing sending the handover commands of all downstream network nodes.
  • Command ie, the first handover command
  • it forwards the handover command of the downstream network node, so it can prevent the most upstream IAB node from receiving its own handover command.
  • the network is switched, resulting in the problem that the switching command cannot be sent to the downstream network node, so that the downstream node can switch to the target network.
  • the network handover method provided by the embodiment of the present application further includes the following step 401:
  • the foregoing step 202 may be specifically implemented by the following step 202a.
  • Step 401 The first IAB node receives the target switching command and the first switching command, and sends the target switching command to the target network node within the first preset time period.
  • the above-mentioned first preset duration is the preset duration starting from receiving the target switching command and the first switching command.
  • the target switching command and the first switching command are from the first IAB node directly sent by the source CU; if the first IAB node is an IAB For any downstream IAB node in the network, the target switching command and the first switching command are forwarded to the first IAB node by the network node upstream of the first IAB node.
  • the first IAB node after receiving the first handover command, the first IAB node does not execute the handover process of the first IAB node within the first preset time period, but forwards the target handover command.
  • Step 202a When the target switching command has been sent to the target network node, the first IAB node executes the switching process of the first IAB node according to the first switching command after the first preset time period.
  • a timing-based method enables an IAB node in the IAB network to be handed over to confirm that the handover command forwarded to all downstream nodes has been successfully forwarded. Specifically, the source CU first sends each IAB node's own handover command.
  • an IAB node to be handed over When an IAB node to be handed over receives its own handover command, it waits for a period of time (a timer can be pre-configured), and then does not start the handover procedure during this period ; During the waiting period, the source CU can continue to forward the switching command of the downstream IAB node through the IAB node to be handed over; after the waiting time expires (timer expires), the IAB node to be handed over starts its own handover procedure.
  • the waiting time is the reserved time for forwarding the handover command of the downstream node; the waiting time can be configured through RRC signaling.
  • the first IAB node after receiving the target switching command and the first switching command, the first IAB node can complete the forwarding of the target switching command within the first preset duration, and then execute the first IAB node after the first preset duration
  • the handover process that is, the first IAB node does not perform the handover process within the first preset time period, so it can prevent the first IAB node from performing network handover after receiving the first handover command, which results in the failure to send to downstream network nodes
  • the problem of switching commands can enable downstream nodes to switch to the target network.
  • the network handover method provided by the embodiment of the present application further includes the following steps 501 and Step 502, and the above-mentioned step 201 can be specifically implemented by the following step 201a.
  • Step 501 The first IAB node receives at least one signaling container.
  • each of the above-mentioned at least one signaling container includes a handover command corresponding to a network node in the IAB network, and at least one signaling container is directly sent by the source CU to the first IAB node. , Or the source CU is forwarded to the first IAB node through the network node upstream of the first IAB node.
  • the first IAB node is the most upstream network node in the IAB network, then at least one signaling container is the first IAB node directly sent by the source CU; if the first IAB node is any node in the IAB network For a downstream IAB node, at least one signaling container is forwarded to the first IAB node by the network node upstream of the first IAB node.
  • each signaling container may be a radio resource control (Radio Resource Control, RRC) signaling container or an F1 layer application protocol (F1-Application Protocol, F1-AP) signaling container.
  • RRC Radio Resource Control
  • F1-Application Protocol F1-AP
  • Step 502 The first IAB node determines the first handover command and the target handover command according to at least one signaling container.
  • the first IAB node may obtain/extract the corresponding handover command from each signaling container in the at least one signaling container to obtain the first handover command And target handover commands, and identify each signaling container to determine the handover signaling that needs to be forwarded.
  • Step 201a The first IAB node determines, according to the count of at least one signaling container, whether it has completed sending the target switching command to the target network node.
  • the first IAB node can count the signaling containers corresponding to the handover signaling that needs to be forwarded to: Judge whether all the handover commands of all downstream nodes have been forwarded.
  • a method based on a signaling container allows an IAB node in the IAB network to be handed over to confirm that the handover command forwarded to all downstream nodes has been successfully forwarded.
  • the source CU uses the RRC signaling container or the F1-AP signaling container to send the received handover command of the node of the IAB network to be switched, and the IAB node to be handed over uses the signaling container to identify what needs to be forwarded.
  • the first IAB node can determine whether it has completed sending the target switching command to the target network node according to the count of at least one signaling container, and when it is determined that the target switching command has been sent, execute the first IAB node's
  • the handover process can therefore avoid the problem of network switching when the first IAB node has not completed forwarding the handover command of the downstream network node, resulting in the inability to send the handover command to the downstream network node, so that the downstream node can switch to the target network.
  • the embodiment of the present application provides a network switching method.
  • the first IAB node executes the switching process of the first IAB node according to the received first switching command. Since the first IAB node does not execute the handover process of the first IAB node until it has determined that it has completed sending the corresponding handover command to the downstream network node, it can avoid that the first IAB node has not finished forwarding the handover command of the downstream network node.
  • the network switch is performed, which results in the problem that the switch command cannot be sent to the downstream network node, thereby ensuring that the downstream network node can switch to the target network in time.
  • the network switching method provided in the embodiment of the present application further includes the following steps 601 and 602.
  • Step 601 If the handover of the first IAB node has been completed, the first IAB node sends first handover completion information to the target CU.
  • the foregoing first handover completion information is used to indicate that the handover of the first IAB node has been completed.
  • Step 602 The target CU receives the first handover completion information sent by the first IAB node.
  • the first IAB node may send the handover completion information to the target CU to indicate to the target CU that the handover of the first IAB node has been completed.
  • the network handover method provided in the embodiment of the present application further includes the following step 701 (or step 702) and step 703.
  • Step 701 In the case of receiving the RRC signaling sent by the target network node, if the handover of the first IAB node has been completed, the first IAB node sends the RRC signaling to the target CU.
  • Step 702 In the case of receiving the RRC signaling sent by the target network node, if the handover of the first IAB node is not completed, the first IAB node buffers the RRC signaling, and after completing the handover of the first IAB node, The target CU sends RRC signaling.
  • the first IAB node may send the first handover completion information and RRC signaling to the target CU.
  • the first IAB node may cache all RRC signaling from downstream network nodes, and after the first IAB handover is completed, forward all the cached RRC signaling to the target CU.
  • the first IAB node forwards some RRC signaling that should have been sent to the source CU to the target CU, and the target CU discards it after receiving it.
  • the advantage of this method is low complexity.
  • Step 703 The target CU receives the RRC signaling sent by the first IAB node.
  • the foregoing RRC signaling includes second handover completion information of the target network node, and the second handover completion information is used to indicate that the handover of the target network node has been completed.
  • the foregoing second handover completion information is information carried in a specific radio link control (Radio Link Control, RLC) channel.
  • RLC Radio Link Control
  • the handover completion information can be sent on a specific RLC channel (channel), for example, the target CU reconfigures the LCID of the LCH corresponding to the Signaling Radio Bearers (Signaling Radio Bearers, SRB).
  • SRB Signaling Radio Bearers
  • the first IAB node only needs to buffer the RRC information/signaling transmitted using the LCH.
  • the first IAB node regards the RRC information received from the LCH (configured by the source CU) corresponding to the original SRB as RRC information sent to the source CU. Since the connection with the source CU is lost after the handover, these RRC signaling is directly discarded.
  • the target CU can reconfigure the LCH of the SRB, so that the first IAB node can identify the information sent to the source CU and the information of the target CU through the LCID.
  • the embodiment of the present application provides a network switching method applied to a source CU.
  • the network switching method may include the following steps 801 and 802.
  • Step 801 The source CU sends a first switching command and a target switching command to the first IAB node in the IAB network to be switched.
  • the above-mentioned first handover command is a handover command corresponding to the first IAB node
  • the target handover command includes a handover command corresponding to all network nodes downstream of the first IAB node in the IAB network.
  • the first handover command is used for the first IAB node to execute the handover process of the first IAB node when the first IAB node has finished sending the target handover command to the target network node
  • the target network node is the downstream of the first IAB node in the IAB network.
  • the above-mentioned first IAB node is the most upstream network node in the IAB network.
  • the above step 801 can be specifically implemented by the following step 801a.
  • Step 801a The source CU preferentially sends the target switching command to the first IAB node, and then sends the first switching command to the first IAB node.
  • step 801 may be specifically implemented by the following step 801b.
  • Step 801b The source CU sends at least one signaling container to the first IAB node.
  • each of the above-mentioned at least one signaling container includes a handover command corresponding to a network node in the IAB network, and at least one signaling container is directly sent by the source CU to the first IAB node. , Or the source CU is forwarded to the first IAB node through the network node upstream of the first IAB node.
  • the first IAB node executes the first IAB after sending the target switching command to the target network node.
  • the switching process of nodes can therefore avoid the problem of the first IAB node from performing network switching when it has not completed forwarding the switching command of the downstream network node, resulting in the inability to send the switching command to the downstream network node, thereby ensuring that the downstream network node can Switch to the target network in time.
  • step 801 to step 802 reference may be made to the description of the above embodiment, which will not be repeated here.
  • the following describes the process of switching the IAB network from the source CU network to the target CU network provided by the embodiment of the present application through a specific implementation manner (that is, the following steps 1 to 12).
  • Step 1 The source CU generates a handover request message for all network nodes (IAB nodes or UE) in the IAB network to be handed over, and sends the handover request message to the target CU; each handover request message contains the corresponding network node to be handed over Contextual information.
  • IAB nodes IAB nodes or UE
  • Step 2 After receiving the handover request message of each network node in the IAB network, the target CU establishes an environment to serve each network node according to the context information carried in the handover request message, including, for example, establishing a bearer, configuring radio resources, and configuring Return channel, etc.
  • Step 3 The target CU generates a switching command (or referred to as a switching response message) for each network node, and sends the switching command of each network node to the source CU.
  • a switching command or referred to as a switching response message
  • Step 4 After receiving the switching commands of each network node, the source CU sends all switching commands to the most upstream IAB node in the IAB network through the parent IAB-DU of the most upstream IAB node in the IAB network (for example, the above figure 4 IAB node 1).
  • Step 5 After receiving the switching command of each network node, the most upstream IAB node in the IAB network determines that the switching command of all network nodes has been received.
  • Step 6 The most upstream IAB node forwards all the handover commands belonging to the downstream node to the downstream node (for example, the IAB node 2 in FIG. 4 above), and then executes the following step 8.
  • Step 7 After receiving all the handover commands, a downstream IAB node to be handed over forwards all handover commands belonging to the downstream child node to the downstream node, and then executes the following step 8x.
  • Step 8 The most upstream IAB node completes the handover pre-configuration according to its own handover command.
  • Step 8x A child node of the most upstream IAB node (for example, IAB node 2) is pre-configured according to its own handover command.
  • Step 9 The most upstream IAB node in the IAB network establishes a wireless connection and a backhaul channel with the target CU network according to the handover command.
  • step 7 step 8, step 8x, and step 9 above, that is, the embodiment of the present application does not limit the execution order of these four steps.
  • Step 10 After a child node of the most upstream IAB node (for example, IAB node 2) completes the reconfiguration according to the switching command, it sends the switching completion information to the target CU through the most upstream IAB node.
  • a child node of the most upstream IAB node for example, IAB node 2
  • Step 11 After the most upstream IAB node (IAB node 1) receives the handover completion information, if the IAB node 1 is not successfully handover, it will cache the handover completion information.
  • Step 12 After the switching of the IAB node 1 is completed, the received switching completion information of the downstream node is sent to the target CU.
  • the IAB node 1 directly forwards the received handover completion information from the downstream node without performing step 11 above.
  • FIG. 9 shows a schematic diagram of a possible structure of a network switching device involved in an embodiment of the present application.
  • the network switching apparatus 70 provided by the embodiment of the present application may include: an execution module 71.
  • the execution module 71 is configured to execute the switching process of the first IAB node in the IAB network to be switched according to the first switching command that has been received when the target switching command has been sent to the target network node.
  • the target network node is a sub-IAB node downstream of the first IAB node in the IAB network or a UE served by the first IAB node
  • the target switching command includes switching commands corresponding to all network nodes downstream of the first IAB node in the IAB network
  • the first handover command is a handover command corresponding to the first IAB node.
  • the above-mentioned first handover command is directly sent by the source CU to the first IAB node; in the first IAB node In the case of any downstream IAB node in the IAB network, the above-mentioned first handover command is forwarded by the source CU to the first IAB node through the network node upstream of the first IAB node.
  • the network switching device 70 may further include: a receiving module 72 and a sending module 73.
  • the receiving module 72 is configured to receive the source before executing the switching process of the first IAB node according to the first switching command that has been received when the execution module 71 has completed sending the target switching command to the target network node.
  • the sending module 73 is used to send a target switching command to the target network node.
  • the receiving module 72 is also configured to receive the first handover command sent by the source CU.
  • the network switching apparatus 70 may further include: a receiving module 72 and a sending module 73.
  • the receiving module 72 is configured to receive the target before executing the switching process of the first IAB node according to the first switching command that has been received when the execution module 71 has finished sending the target switching command to the target network node.
  • the sending module 73 is configured to send a target switching command to the target network node within a first preset duration, where the first preset duration is a preset duration starting from receiving the target switching command and the first switching command.
  • the above-mentioned execution module 71 is specifically configured to execute the handover process of the first IAB node according to the first handover command after the first preset duration.
  • the network switching apparatus 70 may further include: a receiving module 72 and a determining module 74.
  • the receiving module 72 is configured to receive at least before executing the switching process of the first IAB node according to the received first switching command when the execution module 71 has completed sending the target switching command to the target network node.
  • a signaling container, each signaling container includes a handover command corresponding to a network node in the IAB network, at least one signaling container is directly sent by the source CU to the first IAB node, or the source CU is in the first IAB The network node upstream of the node forwards it to the first IAB node.
  • the determining module 74 is configured to determine the first switching command and the target switching command according to the at least one signaling container, and determine whether the target switching command has been sent to the target network node according to the count of the at least one signaling container.
  • each signaling container is an RRC signaling container or an F1-AP signaling container.
  • the network switching apparatus 70 may further include: a sending module 73.
  • the sending module 73 is configured to send the first switching completion information to the target CU after the switching process of the first IAB node is executed by the execution module 71, if the switching of the first IAB node has been completed, the first switching completion information Used to indicate that the handover of the first IAB node has been completed.
  • the network switching apparatus 70 may further include: a sending module 73.
  • the sending module 73 is configured to, after the above-mentioned execution module 71 executes the handover process of the first IAB node, in the case of receiving the RRC signaling sent by the target network node, if the handover of the first IAB node has been completed, send to The target CU sends RRC signaling.
  • the network switching device 70 may further include: a cache module and a sending module 73.
  • the buffer module is used for buffering the RRC signaling if the handover of the first IAB node is not completed when the RRC signaling sent by the target network node is received.
  • the sending module 73 is configured to send RRC signaling to the target CU after completing the handover of the first IAB node.
  • the foregoing RRC signaling includes second handover completion information of the target network node, and the second handover completion information is used to indicate that the handover of the target network node has been completed.
  • the foregoing second handover completion information is information carried in a specific RLC channel.
  • the network switching apparatus provided in the embodiment of the present application can implement each process implemented by the first IAB node in the foregoing method embodiment. To avoid repetition, the specific description will not be repeated here.
  • the embodiment of the present application provides a network switching device. Since the network switching device determines that it has completed sending the corresponding switching command to the downstream network node, it executes the switching process of the network switching device, thus avoiding the network switching device from completing the forwarding process.
  • the downstream network node performs the network switch when the switch command is performed, which leads to the problem that the switch command cannot be sent to the downstream network node, so that it can ensure that the downstream network node can switch to the target network in time.
  • the network switching device in the embodiment of the present application may be a device, or a component, integrated circuit, or chip in the first IAB node.
  • FIG. 12 shows a schematic diagram of a possible structure of a network switching device involved in an embodiment of the present application.
  • the network switching device 80 provided in the embodiment of the present application may include: a sending module 81.
  • the sending module 81 is configured to send a first handover command and a target handover command to the first IAB node in the IAB network to be handed over.
  • the first handover command is a handover command corresponding to the first IAB node
  • the target handover command includes Handover commands corresponding to all network nodes downstream of the first IAB node in the IAB network.
  • the first handover command is used for the first IAB node to execute the handover process of the first IAB node when the first IAB node has finished sending the target handover command to the target network node, and the target network node is the downstream of the first IAB node in the IAB network.
  • the first handover command is sent by the source CU to the first IAB node.
  • the first handover command is forwarded by the source CU to the first IAB node through the network node upstream of the first IAB node.
  • the foregoing first IAB node is the most upstream network node in the IAB network.
  • the foregoing sending module 81 is specifically configured to send the target switching command to the first IAB node first, and then send the first switching command to the first IAB node.
  • the aforementioned sending module 81 is specifically configured to send at least one signaling container to the first IAB node, and each signaling container includes a handover command corresponding to a network node in the IAB network, at least A signaling container is directly sent by the source CU to the first IAB node, or the source CU is forwarded to the first IAB node through a network node upstream of the first IAB node.
  • each signaling container is a radio resource control RRC signaling container or an F1-AP signaling container.
  • the network switching device provided in the embodiment of the present application can implement each process implemented by the source CU in the foregoing method embodiment. To avoid repetition, the specific description will not be repeated here.
  • the embodiment of the present application provides a network switching device, because the network switching device can send a target switching command and a first switching command to the first IAB node, so that the first IAB node has completed sending the target switching command to the target network node Execute the handover process of the first IAB node, so it can avoid the first IAB node from performing network handover when it has not completed forwarding the handover command of the downstream network node, resulting in the problem that the handover command cannot be sent to the downstream network node. Ensure that downstream network nodes can switch to the target network in time.
  • the network switching device in the embodiment of the present application may be a device, or a component, integrated circuit, or chip in the source CU.
  • an embodiment of the present application further provides a communication device 90, including a processor 91, a memory 92, and a program or instruction that is stored on the memory 92 and can run on the processor 91,
  • a communication device 90 including a processor 91, a memory 92, and a program or instruction that is stored on the memory 92 and can run on the processor 91
  • the communication device 90 is an IAB node
  • the program or instruction is executed by the processor 91
  • each process implemented by the first IAB node in the foregoing method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, this is not Repeat it again.
  • the communication device 90 is a CU
  • the program or instruction is executed by the processor 91
  • each process implemented by the source CU in the foregoing method embodiment is realized, and the same technical effect can be achieved. To avoid repetition, details are not described herein again.
  • FIG. 14 is a schematic diagram of the hardware structure of an IAB node that implements the embodiment of the present application.
  • the IAB node 100 includes: an antenna 101, a radio frequency device 102, and a baseband device 103.
  • the antenna 101 is connected to the radio frequency device 102.
  • the radio frequency device 102 receives information through the antenna 101, and sends the received information to the baseband device 103 for processing.
  • the baseband device 103 processes the information to be sent and sends it to the radio frequency device 102, and the radio frequency device 102 processes the received information and sends it out via the antenna 101.
  • the foregoing frequency band processing device may be located in the baseband device 103, and the method executed by the IAB node in the above embodiment may be implemented in the baseband device 103, and the baseband device 103 includes a processor 104 and a memory 105.
  • the baseband device 103 may include, for example, at least one baseband board, and multiple chips are arranged on the baseband board, as shown in FIG. The IAB node operation shown in the above method embodiment.
  • the baseband device 103 may also include a network interface 106 for exchanging information with the radio frequency device 102, and the interface is, for example, a common public radio interface (CPRI).
  • CPRI common public radio interface
  • the IAB node in the embodiment of the present application further includes: instructions or programs that are stored on the memory 105 and can run on the processor 104, and the processor 104 calls the instructions or programs in the memory 105 to execute the methods executed by the above-mentioned modules, And to achieve the same technical effect, in order to avoid repetition, so I will not repeat it here.
  • the embodiment of the present application also provides a readable storage medium with a program or instruction stored on the readable storage medium.
  • a program or instruction stored on the readable storage medium.
  • the processor is the processor in the terminal described in the foregoing embodiment.
  • the readable storage medium includes a computer readable storage medium, such as ROM, RAM, magnetic disk, or optical disk.
  • FIG. 15 is a schematic diagram of the hardware structure of a CU that implements the embodiment of the present application.
  • the CU 110 includes but is not limited to: at least one processor 111, a memory 112, a user interface 113, and at least one network interface 114.
  • the various components in the CU 110 are coupled together through the bus system 115.
  • the structure of the CU 110 shown in FIG. 15 does not constitute a limitation on the CU, and the CU may include more or less components than those shown in FIG. Components, or different component arrangements.
  • At least one network interface 114 is used to send a first handover command and a target handover command to the first IAB node in the IAB network to be handed over, and the first handover command is a handover command corresponding to the first IAB node
  • the target switching command includes switching commands corresponding to all network nodes downstream of the first IAB node in the IAB network.
  • the first handover command is used for the first IAB node to execute the handover process of the first IAB node when the first IAB node has finished sending the target handover command to the target network node, and the target network node is the downstream of the first IAB node in the IAB network.
  • the source CU can send the target switching command and the first switching command to the first IAB node, so that the first IAB node executes the first IAB after sending the target switching command to the target network node.
  • the switching process of nodes can therefore avoid the problem of the first IAB node from performing network switching when it has not completed forwarding the switching command of the downstream network node, resulting in the inability to send the switching command to the downstream network node, thereby ensuring that the downstream network node can Switch to the target network in time.
  • bus system 115 is used to implement connection and communication between these components.
  • the bus system 115 also includes a power bus, a control bus, and a status signal bus.
  • various buses are marked as the bus system 115 in FIG. 15.
  • the user interface 113 may include a display, a keyboard, or a pointing device (for example, a mouse, a trackball, a touch panel, or a touch screen) and the like.
  • a pointing device for example, a mouse, a trackball, a touch panel, or a touch screen
  • the memory 112 in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • dynamic RAM dynamic random access memory
  • DRAM dynamic random access memory
  • synchronous dynamic random access memory synchronous DRAM, SDRAM
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDRSDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • synchronous link dynamic random access memory synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • the memory 112 stores the following elements, executable modules or data structures, or their subsets, or their extended sets: operating system 1121 and application programs 1122.
  • the operating system 1121 includes various system programs, such as a framework layer, a core library layer, and a driver layer, which are used to implement various basic services and process hardware-based tasks.
  • the application program 1122 includes various application programs, such as a media player, a browser, etc., for implementing various application services.
  • the program for implementing the method of the embodiment of the present application may be included in the application program 1122.
  • the CU 110 may further include a program or instruction that is stored on the memory 112 and can run on the processor 111, and the program or instruction implements the steps of the method provided in the embodiment of the present application when the program or instruction is executed by the processor 111.
  • the methods disclosed in the foregoing embodiments of the present application may be applied to the processor 111 or implemented by the processor 111.
  • the processor 111 may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the foregoing method can be completed by an integrated logic circuit of hardware in the processor 111 or instructions in the form of software.
  • the aforementioned processor 111 may be a general-purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (field programmable gate array, FPGA) or other Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • Programmable logic devices discrete gates or transistor logic devices, discrete hardware components.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a computer-readable storage medium that is mature in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the computer-readable storage medium is located in the memory 112, and the processor 111 reads the information in the memory 112, and completes the steps of the foregoing method in combination with its hardware.
  • a program or instruction is stored on the computer-readable storage medium, and when the program or instruction is executed by the processor 111, each step of the method embodiment as provided in the embodiment of the present application is implemented.
  • the embodiments described in the embodiments of the present application can be implemented by hardware, software, firmware, middleware, microcode, or a combination thereof.
  • the processing unit can be implemented in one or more ASICs, DSPs, digital signal processing devices (DSP devices, DSPD), programmable logic devices (programmable logic devices, PLDs), FPGAs, general-purpose processors, controllers, and microcomputers. Controllers, microprocessors, other electronic units for performing the functions described in this application, or a combination thereof.
  • the technology described in the embodiments of the present application can be implemented by modules (for example, procedures, functions, etc.) that execute the functions described in the embodiments of the present application.
  • the software codes can be stored in the memory and executed by the processor.
  • the memory can be implemented in the processor or external to the processor.
  • the embodiment of the present application also provides a readable storage medium, the readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor 111 as shown in FIG. 15, each process of the foregoing method embodiment is implemented, and To achieve the same technical effect, in order to avoid repetition, I will not repeat them here.
  • the computer-readable storage medium such as ROM, RAM, magnetic disk or optical disk, etc.
  • 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 communication device program or instruction to implement the above method embodiments.
  • the chip includes a processor and a communication interface
  • the communication interface is coupled to the processor
  • the processor is used to run a communication device program or instruction to implement the above method embodiments.
  • the chip mentioned in the embodiment of the present application may also be called a system-level chip, a system-on-chip, a system-on-chip, or a system-on-chip, etc.
  • 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

本申请公开了一种网络切换方法、装置、通信设备及系统，该方法包括：在已完成向目标网络节点发送目标切换命令的情况下，根据已接收到的第一切换命令，执行第一IAB节点的切换过程。其中，目标网络节点为IAB网络中处于第一IAB节点下游的一个子IAB节点或第一IAB节点服务的UE，目标切换命令包括IAB网络中处于第一IAB节点下游的所有网络节点对应的切换命令，第一切换命令为第一IAB节点对应的切换命令。

Description

网络切换方法、装置、通信设备及系统
相关申请的交叉引用
本申请主张在2020年06月03日在中国提交的中国专利申请号202010496964.5的优先权，其全部内容通过引用包含于此。
技术领域
本申请属于通信技术领域，具体涉及一种网络切换方法、装置、通信设备及系统。
背景技术
自回传(integrated access backhaul，IAB)系统包括分布单元(distributed unit，DU)功能部分和移动终端(mobile termination，MT)功能部分。在一个自回传回路中，所有的IAB节点的DU都连接到一个集中单元(centralized unit，CU)节点，由该CU节点进行DU和MT进行配置。
当一个IAB网络(例如包括IAB1节点、该IAB1节点的下游节点和用户设备(user equipment，UE)等)从源网络(即源CU控制的网络)切换到目标网络(即目标CU控制的网络)时，若该IAB网络中的最上游IAB节点(即IAB1节点)先从源网络切换到目标网络之后再切换下游的节点，则源CU在该IAB节点切换完成后无法向下游待切换节点发送切换命令，因此会导致下游节点无法切换到目标网络。
发明内容
本申请实施例的目的是提供一种网络切换方法、装置、通信设备及系统，能够解决当一个待切换IAB网络从源网络切换到目标网络时，会存在下游节点无法及时地切换到目标网络的问题。
为了解决上述技术问题，本申请是这样实现的：
第一方面，提供了一种网络切换方法，应用于待切换的IAB网络中的第一IAB节点，该网络切换方法包括：在已完成向目标网络节点发送目标切换命令的情况下，根据已接收到的第一切换命令，执行第一IAB节点的切换过程。其中，目标网络节点为IAB网络中处于第一IAB节点下游的一个子IAB节点或第一IAB节点服务的UE，目标切换命令包括IAB网络中处于第一IAB节点下游的所有网络节点对应的切换命令，第一切换命令为第一IAB节点对应的切换命令。
第二方面，提供了一种网络切换方法，应用于源CU，该网络切换方法包括：向待切换的IAB网络中的第一IAB节点发送第一切换命令和目标切换命令，第一切换命令为第一IAB节点对应的切换命令，目标切换命令包括IAB网络中处于第一IAB节点下游的所有网络节点对应的切换命令。其中，第一切换命令用于第一IAB节点在已完成向目标网络节点发送目标切换命令的情况下，执行第一IAB节点的切换过程，目标网络节点为IAB网络中处于第一IAB节点下游的一个子IAB节点或第一IAB节点服务的UE。
第三方面，提供了一种网络切换装置，该网络切换装置包括：执行模块。其中，执行模块，用于在已完成向目标网络节点发送目标切换命令的情况下，根据已接收到的第一切换命令，执行待切换的IAB网络中的第一IAB节点的切换过程。其中，目标网络节点为IAB网络中处于第一IAB节点下游的一个子IAB节点或第一IAB节点服务的UE，目标切换命令包括IAB网络中处于第一IAB节点下游的所有网络节点对应的切换命令，第一切换命令为第一IAB节点对应的切换命令。
第四方面，提供了一种网络切换装置，该网络切换装置包括：发送模块。其中，发送模块，用于向待切换的IAB网络中的第一IAB节点发送第一切换命令和目标切换命令，第一切换命令为第一IAB节点对应的切换命令，目标切换命令包括IAB网络中处于第一IAB节点下游的所有网络节点对应的切换命令。其中，第一切换命令用于第一IAB节点在已完成向目标网络节点发送目标切换命令的情况下，执行第一IAB节点的切换过程，目标网络节点为IAB网络中处于第一IAB节点下游的一个子IAB节点或第一IAB节点服务的UE。
第五方面，提供了一种IAB节点，该IAB节点包括处理器、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第一方面所述的网络切换方法的步骤。
第六方面，提供了一种CU，该CU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第二方面所述的网络切换方法的步骤。
第七方面，提供了一种通信系统，该通信系统包括如第三方面所述的网络切换装置和如第四方面所述的网络切换装置；或者，该通信系统包括如第五方面所述的IAB节点和如第六方面所述的CU。
第八方面，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第一方面所述的网络切换方法的步骤，或者实现如第二方面所述的网络切换方法的步骤。
第九方面，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，实现如第一方面所述的网络切换方法，或者实现如第二方面所述的网络切换方法。
在本申请实施例中，在已完成向目标网络节点发送目标切换命令的情况下，第一IAB节点根据已接收到的第一切换命令，执行第一IAB节点的切换过程。由于第一IAB节点在确定已完成向下游的网络节点发送对应的切换命令之后，才执行第一IAB节点的切换过程，因此可以避免第一IAB节点在未完成转发下游的网络节点的切换命令时进行网络切换，而导致无法向下游的网络节点发送切换命令的问题，从而可以保证下游的网络节点能够及时地切换到目标网络。
附图说明
图1为本申请实施例提供的一种IAB系统的架构示意图；
图2为本申请实施例提供的一种源CU网络切换到目标CU网络的结构示意图；
图3为本申请实施例提供的一种IAB系统的CU-DU结构示意图；
图4为本申请实施例提供的一种网络切换方法的示意图之一；
图5为本申请实施例提供的一种网络切换方法的示意图之二；
图6为本申请实施例提供的一种网络切换方法的示意图之三；
图7为本申请实施例提供的一种网络切换方法的示意图之四；
图8为本申请实施例提供的一种网络切换方法的示意图之五；
图9为本申请实施例提供的一种网络切换装置的结构示意图之一；
图10为本申请实施例提供的一种网络切换装置的结构示意图之二；
图11为本申请实施例提供的一种网络切换装置的结构示意图之三；
图12为本申请实施例提供的一种网络切换装置的结构示意图之四；
图13为本申请实施例提供的一种通信设备的结构示意图；
图14为本申请实施例提供的一种IAB节点的硬件示意图；
图15为本申请实施例提供的一种CU的硬件示意图。
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，且“第一”、“第二”所区别的对象通常为一类，并不限定对象的个数，例如第一对象可以是一个，也可以是多个。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。
下面对本申请实施例提供的网络切换方法、装置、通信设备及系统中涉及的一些概念和/或术语做一下解释说明。
IAB系统：图1示出了一个IAB系统的架构示意图。一个IAB节点包括DU功能部分和MT功能部分。依靠MT，一个接入点(即IAB node)可以找到一个上游接入点(parent IAB node)，并跟上游接入点的DU建立无线连接，该无线连接被称为无线回传链路(backhaul link)。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可以为用户设备(user equipment，UE)提供接入服务。一个自回传回路包含一个归属(donor)IAB节点(或者称为IAB donor)，donor IAB节点有直接相连的有线传输网。IAB系统的引入是为了解决接入点密集部署时，有线传输网部署不到位的情况。即在没有有线传输网络时，接入点可以依赖无线回传。
UE也可以称作终端设备，UE可以是手机、平板电脑(Tablet Personal Computer)、膝上型电脑(Laptop Computer)或称为笔记本电脑、个人数字助理(Personal Digital Assistant，PDA)、掌上电脑、上网本、超级移动个人计算机(ultra-mobile personal computer，UMPC)、移动上网装置(Mobile Internet Device，MID)、可穿戴式设备(Wearable Device)或车载设备(VUE)、行人终端(PUE)等终端侧设备，可穿戴式设备包括：手环、耳机、眼镜等。需要说明的是，在本申请实施例并不限定UE的具体类型。
值得指出的是，本申请实施例所描述的技术不限于长期演进型(Long Term Evolution， LTE)/LTE的演进(LTE-Advanced，LTE-A)系统，还可用于其他无线通信系统，诸如码分多址(Code Division Multiple Access，CDMA)、时分多址(Time Division Multiple Access，TDMA)、频分多址(Frequency Division Multiple Access，FDMA)、正交频分多址(Orthogonal Frequency Division Multiple Access，OFDMA)、单载波频分多址(Single-carrier Frequency-Division Multiple Access，SC-FDMA)和其他系统。本申请实施例中的术语“系统”和“网络”常被可互换地使用，所描述的技术既可用于以上提及的系统和无线电技术，也可用于其他系统和无线电技术。然而，以下描述出于示例目的描述了新空口(New Radio，NR)系统，并且在以下大部分描述中使用NR术语，尽管这些技术也可应用于NR系统应用以外的应用，如第6代(6th Generation，6G)通信系统。
图2示出了一个待切换的IAB网络从源CU网络切换到目标CU网络的结构示意图。如图2所示，该IAB网络包括IAB节点1、所有的下游节点(例如IAB节点2)和UE(例如UE 1和UE 2)等。源CU网络对应的源归属(donor)IAB节点包括CU 1和DU，目标CU网络对应的目标归属(donor)IAB节点包括CU 2和DU。
本申请实施例中，源CU可以向IAB节点1发送各个节点的切换命令，以使得IAB节点1转发下游节点(例如IAB节点2和UE)的切换命令。
图3示出了一个IAB系统的CU-DU的结构示意图。在一个自回传回路中，所有的IAB节点的DU都连接到一个CU节点，由这一个节点通过F1层应用协议(F1-Application Protocol，F1-AP)信令进行对DU的配置。CU通过RRC信令进行对MT的配置。donor IAB节点没有MT功能部分。
下面结合附图，通过具体的实施例及其应用场景对本申请实施例提供的网络切换方法进行详细地说明。
基于上述通信系统，本申请实施例提供一种网络切换方法，如图4所示，该网络切换方法可以包括下述的步骤201和步骤202。
步骤201、第一IAB节点确定是否已完成向目标网络节点发送目标切换命令。
步骤202、在已完成向目标网络节点发送目标切换命令的情况下，第一IAB节点根据已接收到的第一切换命令，执行第一IAB节点的切换过程。
本申请实施例中，上述第一IAB节点为待切换的IAB网络中任意的一个IAB节点。上述目标网络节点为IAB网络中处于第一IAB节点下游的一个子IAB节点或第一IAB节点服务的UE，目标切换命令包括IAB网络中处于第一IAB节点下游的所有网络节点对应的切换命令，第一切换命令为第一IAB节点对应的切换命令。
本申请实施例中，待切换的IAB网络中包括待切换的多个网络节点，该多个网络节点可以为多个IAB节点，或者，包括至少一个IAB节点和UE。
可选地，本申请实施例中，上述第一IAB节点可以为IAB网络中最上游的一个网络节点，或者，上述第一IAB节点可以为IAB网络中任意一个下游的IAB节点。
可以理解，若第一IAB节点为IAB网络中最上游的一个网络节点，则目标切换命令为所有切换命令中除第一切换命令之外的切换命令，该所有切换命令为IAB网络中的所有网络节点对应的切换命令。若第一IAB节点为IAB网络中任意一个下游的IAB节点，则目标切换命令包括该IAB节点下游的所有网络节点对应的切换命令。
需要说明的是，第一IAB节点为IAB网络中任意一个下游的IAB节点可以理解为： 第一IAB节点为处于最上游IAB节点(即IAB网络中最上游的网络节点)下游的任意一个IAB节点。
可选地，本申请实施例中，上述目标网络节点可以为IAB网络中的一个IAB节点，或者也可以为IAB网络中的一个UE。
可选地，本申请实施例中，在第一IAB节点为IAB网络中最上游的一个网络节点情况下，上述第一切换命令是由源CU直接发送给第一IAB节点的。可以理解，在这种情况下，上述目标切换命令也是由源CU直接发送给第一IAB节点的。
可选地，本申请实施例中，在第一IAB节点为IAB网络中任意一个下游的IAB节点的情况下，上述第一切换命令是由源CU通过处于第一IAB节点上游的网络节点转发给第一IAB节点的。可以理解，在这种情况下，上述目标切换命令也是由源CU通过处于第一IAB节点上游的网络节点转发给第一IAB节点的。
本申请实施例中，源CU可以为待切换的IAB网络中的所有网络节点生成相应的切换请求消息，并将这些切换请求消息(每个切换请求消息中包含相应待切换的网络节点的上下文信息)发送给目标CU，目标CU在接收到各个待切换的网络节点的切换请求消息后，按照切换请求消息携带的上下文信息，建立服务于各个待切换的网络节点的环境，例如包括建立承载，配置无线资源和配置回传通道等，然后目标CU可以生成关于各个待切换的网络节点的切换命令，并将这些切换命令发送给源CU，以使得源CU在接收到待切换的IAB网络中的所有网络节点对应的切换命令之后，可以将该所有网络节点对应的切换命令转发给IAB网络(即IAB网络中的各个网络节点)。
可选地，在本申请实施例的一种实现方式中，上述第一IAB节点为IAB网络中最上游的一个网络节点。结合图4，如图5所示，在上述步骤201之前，本申请实施例提供的网络切换方法还包括下述的步骤301至步骤304。
步骤301、源CU优先向第一IAB节点发送目标切换命令。
本申请实施例中，源CU可以优先向IAB网络中最上游的IAB节点发送所有下游的网络节点(IAB网络中除最上游的IAB节点之外的网络节点)的切换命令(即目标切换命令)，以使得该最上游的IAB节点可以优先将目标切换命令发送至下游的一个网络节点(例如子IAB节点或第一IAB节点服务的UE)。
步骤302、第一IAB节点接收源CU发送的目标切换命令，并向目标网络节点发送目标切换命令。
步骤303、源CU再向第一IAB节点发送第一切换命令。
步骤304、第一IAB节点接收源CU发送的第一切换命令。
在本申请实施例的这种实现方式中，源CU采用不同发送顺序的方法发送切换命令，以使得待切换的IAB网络中的一个IAB节点确认转发给所有的下游节点的切换命令已经成功转发。具体的，源CU先发送该IAB节点的所有的下游节点的切换命令，最后发送属于该IAB节点的切换命令；当IAB节点收到属于自己的切换命令，就确定所有属于下游节点的切换命令已经发送完毕，可以启动自身的切换过程了。该方法无需带切换IAB节点确定所有的下游IAB节点的切换命令是否已经发送，也无需定义新的信令。
可以理解，由于源CU可以优先发送所有下游的网络节点的切换命令，以使得最上游的IAB节点在完成发送所有下游的网络节点的切换命令之后，再向该最上游的IAB节点发 送自身的切换命令(即第一切换命令)，即使得最上游的IAB节点在执行网络切换之前，先转发了下游的网络节点的切换命令，因此可以避免最上游的IAB节点接收到自身的切换命令之后先进行网络切换，而导致无法向下游的网络节点发送切换命令的问题，从而可以使得下游节点能够切换到目标网络。
可选地，在本申请实施例的另一种实现方式中，结合图4，如图6所示，在上述步骤201之前，本申请实施例提供的网络切换方法还包括下述的步骤401，并且上述步骤202具体可以通过下述的步骤202a实现。
步骤401、第一IAB节点接收目标切换命令和第一切换命令，并在第一预设时长内，向目标网络节点发送目标切换命令。
本申请实施例中，上述第一预设时长为从接收到目标切换命令和第一切换命令开始的预设时长。
需要说明的是，若第一IAB节点为IAB网络中最上游的一个网络节点，则目标切换命令和第一切换命令是由源CU直接发送的第一IAB节点的；若第一IAB节点为IAB网络中任意一个下游的IAB节点，则目标切换命令和第一切换命令是由处于第一IAB节点上游的网络节点转发给第一IAB节点的。
本申请实施例中，第一IAB节点在接收到第一切换命令之后，在第一预设时长内，并不执行第一IAB节点的切换过程，而是进行目标切换命令的转发。
步骤202a、在已完成向目标网络节点发送目标切换命令的情况下，第一IAB节点在第一预设时长之后，根据第一切换命令，执行第一IAB节点的切换过程。
在本申请实施例的这种实现方式中，基于定时的方法，以使得待切换的IAB网络中的一个IAB节点确认转发给所有的下游节点的切换命令已经成功转发。具体的，源CU先发送各IAB节点自身得切换命令，当一个待切换IAB节点收到自身得切换命令后，等待一段时间(可以预配置一个定时器)，再这段时间内不启动切换程序；在等待的这段时间内，源CU可以经该待切换IAB节点继续转发下游IAB节点的切换命令；等待时间结束(定时器超时)后，该待切换IAB节点启动自身切换程序。此处，等待的时间即预留的转发下游节点的切换命令的时间；等待的时长可以通过RRC信令进行配置。
可以理解，由于第一IAB节点在接收到目标切换命令和第一切换命令之后，可以在第一预设时长内完成转发目标切换命令，然后在第一预设时长之后，再执行第一IAB节点的切换过程，即第一IAB节点在第一预设时长内不执行切换过程，因此可以避免第一IAB节点在接收到第一切换命令之后先进行网络切换，而导致无法向下游的网络节点发送切换命令的问题，从而可以使得下游节点能够切换到目标网络。
可选地，在本申请实施例的又一种实现方式中，结合图4，如图7所示，在上述步骤201之前，本申请实施例提供的网络切换方法还包括下述的步骤501和步骤502，并且上述步骤201具体可以通过下述的步骤201a实现。
步骤501、第一IAB节点接收至少一个信令容器。
本申请实施例中，上述至少一个信令容器中的每个信令容器中分别包括IAB网络中的一个网络节点对应的切换命令，至少一个信令容器为源CU直接发送给第一IAB节点的，或源CU通过处于第一IAB节点上游的网络节点转发给第一IAB节点的。
需要说明的是，若第一IAB节点为IAB网络中最上游的一个网络节点，则至少一个信 令容器是由源CU直接发送的第一IAB节点的；若第一IAB节点为IAB网络中任意一个下游的IAB节点，则至少一个信令容器是由处于第一IAB节点上游的网络节点转发给第一IAB节点的。
可选地，本申请实施例中，每个信令容器可以为无线资源控制(Radio Resource Control，RRC)信令容器或F1层应用协议(F1-Application Protocol，F1-AP)信令容器。
步骤502、第一IAB节点根据至少一个信令容器，确定第一切换命令和目标切换命令。
本申请实施例中，第一IAB节点在接收到至少一个信令容器之后，可以从该至少一个信令容器中每个信令容器中获取/提取对应的切换命令，以获取到第一切换命令和目标切换命令，并通过对每个信令容器识别以确定需要转发的切换信令。
步骤201a、第一IAB节点根据至少一个信令容器的计数，确定是否已完成向目标网络节点发送目标切换命令。
本申请实施例中，第一IAB节点在对至少一个信令容器识别以确定需要转发的切换信令之后，第一IAB节点可以通过对需要转发的切换信令对应的信令容器进行计数，以判断所有下游节点的切换命令是否已经全部转发。
在本申请实施例的这种实现方式中，基于信令容器的方法，以使得待切换的IAB网络中的一个IAB节点确认转发给所有的下游节点的切换命令已经成功转发。具体的，源CU在转发切换命令时，使用RRC信令容器或F1-AP信令容器发送收到的待切换IAB网络的节点的切换命令，待切换IAB节点通过信令容器来识别需要转发的切换信令和对转发的切换信令进行计数，判断所有下游节点的切换命令是否已经全部转发。
可以理解，由于第一IAB节点可以根据至少一个信令容器的计数，确定是否已完成向目标网络节点发送目标切换命令，并在确定已完成发送目标切换命令的情况下，执行第一IAB节点的切换过程，因此可以避免第一IAB节点未完成转发下游的网络节点的切换命令时进行网络切换，而导致无法向下游的网络节点发送切换命令的问题，从而可以使得下游节点能够切换到目标网络。
本申请实施例提供一种网络切换方法，在已完成向目标网络节点发送目标切换命令的情况下，第一IAB节点根据已接收到的第一切换命令，执行第一IAB节点的切换过程。由于第一IAB节点在确定已完成向下游的网络节点发送对应的切换命令之后，才执行第一IAB节点的切换过程，因此可以避免第一IAB节点在未完成转发下游的网络节点的切换命令时进行网络切换，而导致无法向下游的网络节点发送切换命令的问题，从而可以保证下游的网络节点能够及时地切换到目标网络。
可选地，本申请实施例中，结合图4，如图8所示，在上述步骤202之后，本申请实施例提供的网络切换方法还包括下述的步骤601和步骤602。
步骤601、若已完成第一IAB节点的切换，则第一IAB节点向目标CU发送第一切换完成信息。
本申请实施例中，上述第一切换完成信息用于指示已完成第一IAB节点的切换。
步骤602、目标CU接收第一IAB节点发送的第一切换完成信息。
本申请实施例中，第一IAB节点在完成网络切换之后，可以向目标CU发送切换完成信息，以向目标CU指示已完成第一IAB节点的切换。
可选地，本申请实施例中，在上述步骤202之后，本申请实施例提供的网络切换方法 还包括下述的步骤701(或步骤702)和步骤703。
步骤701、在接收到目标网络节点发送的RRC信令的情况下，若已完成第一IAB节点的切换，则第一IAB节点向目标CU发送RRC信令。
步骤702、在接收到目标网络节点发送的RRC信令的情况下，若未完成第一IAB节点的切换，则第一IAB节点缓存RRC信令，并在完成第一IAB节点的切换之后，向目标CU发送RRC信令。
本申请实施例中，第一IAB节点在完成第一IAB节点的切换之后，可以向目标CU发送第一切换完成信息和RRC信令。
可选地，本申请实施例中，第一IAB节点可以将来自下游的网络节点的RRC信令都缓存起来，在第一IAB切换完成之后，再将所有缓存的RRC信令转发给目标CU。根据该方法，第一IAB节点会将一些原本应该发给源CU的RRC信令转发给了目标CU，目标CU接收到后会丢弃，该方法的优点是复杂度低。
步骤703、目标CU接收第一IAB节点发送的RRC信令。
可选地，本申请实施例中，上述RRC信令中包括目标网络节点的第二切换完成信息，第二切换完成信息用于指示已完成目标网络节点的切换。
可选地，本申请实施例中，上述第二切换完成信息为特定无线链路控制(Radio Link Control，RLC)信道中承载的信息。
可选地，本申请实施例中，切换完成信息可以在特定的RLC信道(channel)上发送，例如目标CU重配信令资源承载(Signaling Radio Bearers，SRB)对应的LCH的LCID，这样，第一IAB节点只需要缓存使用该LCH传输的RRC信息/信令。第一IAB节点将从原有SRB对应的LCH(由源CU配置)接收的RRC信息视为是发送给源CU的RRC信息，由于切换后与源CU失去连接，这些RRC信令直接被丢弃。这种方法可以通过目标CU重配SRB的LCH，从而使得第一IAB节点可以通过LCID来识别发送给源CU的信息和目标CU的信息。
本申请实施例提供一种网络切换方法，应用于源CU，该网络切换方法可以包括下述的步骤801和步骤802。
步骤801、源CU向待切换的IAB网络中的第一IAB节点发送第一切换命令和目标切换命令。
本申请实施例中，上述第一切换命令为第一IAB节点对应的切换命令，目标切换命令包括IAB网络中处于第一IAB节点下游的所有网络节点对应的切换命令。其中，第一切换命令用于第一IAB节点在已完成向目标网络节点发送目标切换命令的情况下，执行第一IAB节点的切换过程，目标网络节点为IAB网络中处于第一IAB节点下游的一个子IAB节点或第一IAB节点服务的UE。
可选地，本申请实施例中，上述第一IAB节点为IAB网络中最上游的一个网络节点。上述步骤801具体可以通过下述的步骤801a实现。
步骤801a、源CU优先向第一IAB节点发送目标切换命令，再向第一IAB节点发送第一切换命令。
可选地，本申请实施例中，上述步骤801具体可以通过下述的步骤801b实现。
步骤801b、源CU向第一IAB节点发送至少一个信令容器。
本申请实施例中，上述至少一个信令容器中的每个信令容器中分别包括IAB网络中的一个网络节点对应的切换命令，至少一个信令容器为源CU直接发送给第一IAB节点的，或源CU通过处于第一IAB节点上游的网络节点转发给第一IAB节点的。
本申请实施例中，由于源CU可以向第一IAB节点发送目标切换命令和第一切换命令，以使得第一IAB节点在已完成向目标网络节点发送目标切换命令的情况下，执行第一IAB节点的切换过程，因此可以避免第一IAB节点在未完成转发下游的网络节点的切换命令时进行网络切换，而导致无法向下游的网络节点发送切换命令的问题，从而可以保证下游的网络节点能够及时地切换到目标网络。
需要说明的是，针对上述步骤801至步骤802的相关说明，可以参见上述实施例的描述，此处不再赘述。
下面通过具体的实施方式(即下述的步骤1至步骤12)，对本申请实施例提供的IAB网络从源CU网络向目标CU网络切换的流程进行描述。
步骤1、源CU为待切换的IAB网络中的所有网络节点(IAB节点或UE)生成切换请求消息，并将切换请求消息发送给目标CU；每个切换请求消息中包含相应待切换的网络节点的上下文信息。
步骤2、目标CU在接收到IAB网络中的各个网络节点的切换请求消息后，按照切换请求消息携带的上下文信息，建立服务于该各个网络节点的环境，例如包括建立承载、配置无线资源和配置回传通道等。
步骤3、目标CU生成关于各个网络节点的切换命令(或者称为切换响应消息)，并将各个网络节点的切换命令发送给源CU。
步骤4、源CU在接收到各个网络节点的切换命令后，将所有的切换命令经过IAB网络中的最上游IAB节点的父IAB-DU发送给该IAB网络中的最上游IAB节点(例如上述图4中的IAB节点1)。
步骤5、IAB网络中的最上游IAB节点在接收到各个网络节点的切换命令后，确定所有网络节点的切换命令均已接收到。
步骤6、最上游IAB节点将属于下游节点的切换命令全部转发给下游节点(例如上述图4中的IAB节点2)，然后执行下述的步骤8。
步骤7、一个下游的待切换子IAB节点在接收到所有的切换命令后，将所有的属于下游子节点的切换命令转发给下游节点，然后执行下述的步骤8x。
步骤8、最上游IAB节点按照属于自身的切换命令完成切换预配置。
步骤8x、最上游IAB节点的一个子节点(例如IAB节点2)根据属于自身的切换命令进行预配置。
步骤9、IAB网络中的最上游IAB节点根据切换命令建立与目标CU网络的无线连接和回传通道。
需要说明的是，上述步骤7、步骤8、步骤8x和步骤9没有特定的先后关系，即本申请实施例对这四个步骤的执行顺序不作限制。
步骤10、最上游IAB节点的一个子节点(例如IAB节点2)在按照切换命令完成重配置后，通过最上游IAB节点向目标CU发送切换完成信息。
步骤11、最上游IAB节点(IAB节点1)在接收到切换完成信息后，如果IAB节点1 未切换成功，则将该切换完成信息缓存起来。
步骤12、在IAB节点1切换完成后，再将接收到的下游节点的切换完成信息发送给目标CU。
需要说明的是，如果IAB节点1已经切换完成，则直接转发接收到的来自下游节点的切换完成信息，无需执行上述步骤11。
图9示出了本申请实施例中涉及的网络切换装置的一种可能的结构示意图。如图9所示，本申请实施例提供的网络切换装置70可以包括：执行模块71。
其中，执行模块71，用于在已完成向目标网络节点发送目标切换命令的情况下，根据已接收到的第一切换命令，执行待切换的IAB网络中的第一IAB节点的切换过程。其中，目标网络节点为IAB网络中处于第一IAB节点下游的一个子IAB节点或第一IAB节点服务的UE，目标切换命令包括IAB网络中处于第一IAB节点下游的所有网络节点对应的切换命令，第一切换命令为第一IAB节点对应的切换命令。
在一种可能的实现方式中，在第一IAB节点为IAB网络中最上游的一个网络节点情况下，上述第一切换命令是由源CU直接发送给第一IAB节点的；在第一IAB节点为IAB网络中任意一个下游的IAB节点的情况下，上述第一切换命令是由源CU通过处于第一IAB节点上游的网络节点转发给第一IAB节点的。
在一种可能的实现方式中，上述第一IAB节点为IAB网络中最上游的一个网络节点。结合图9，如图10所示，本申请实施例提供的网络切换装置70还可以包括：接收模块72和发送模块73。其中，接收模块72，用于在上述执行模块71在已完成向目标网络节点发送目标切换命令的情况下，根据已接收到的第一切换命令，执行第一IAB节点的切换过程之前，接收源CU发送的目标切换命令。发送模块73，用于向目标网络节点发送目标切换命令。接收模块72，还用于接收源CU发送的第一切换命令。
在一种可能的实现方式中，结合图9，如图10所示，本申请实施例提供的网络切换装置70还可以包括：接收模块72和发送模块73。其中，接收模块72，用于在上述执行模块71在已完成向目标网络节点发送目标切换命令的情况下，根据已接收到的第一切换命令，执行第一IAB节点的切换过程之前，接收目标切换命令和第一切换命令。发送模块73，用于在第一预设时长内，向目标网络节点发送目标切换命令，该第一预设时长为从接收到目标切换命令和第一切换命令开始的预设时长。上述执行模块71，具体用于在第一预设时长之后，根据第一切换命令，执行第一IAB节点的切换过程。
在一种可能的实现方式中，结合图9，如图11所示，本申请实施例提供的网络切换装置70还可以包括：接收模块72和确定模块74。其中，接收模块72，用于在上述执行模块71在已完成向目标网络节点发送目标切换命令的情况下，根据已接收到的第一切换命令，执行第一IAB节点的切换过程之前，接收至少一个信令容器，每个信令容器中分别包括IAB网络中的一个网络节点对应的切换命令，至少一个信令容器为源CU直接发送给第一IAB节点的，或源CU通过处于第一IAB节点上游的网络节点转发给第一IAB节点的。确定模块74，用于根据至少一个信令容器，确定第一切换命令和目标切换命令，并根据至少一个信令容器的计数，确定是否已完成向目标网络节点发送目标切换命令。其中，每个信令容器为RRC信令容器或F1-AP信令容器。
在一种可能的实现方式中，本申请实施例提供的网络切换装置70还可以包括：发送 模块73。其中，发送模块73，用于在上述执行模块71执行第一IAB节点的切换过程之后，若已完成第一IAB节点的切换，则向目标CU发送第一切换完成信息，该第一切换完成信息用于指示已完成第一IAB节点的切换。
在一种可能的实现方式中，本申请实施例提供的网络切换装置70还可以包括：发送模块73。其中，发送模块73，用于在上述执行模块71执行第一IAB节点的切换过程之后，在接收到目标网络节点发送的RRC信令的情况下，若已完成第一IAB节点的切换，则向目标CU发送RRC信令。
在一种可能的实现方式中，本申请实施例提供的网络切换装置70还可以包括：缓存模块和发送模块73。其中，缓存模块，用于在接收到目标网络节点发送的RRC信令的情况下，若未完成第一IAB节点的切换，则缓存RRC信令。发送模块73，用于在完成第一IAB节点的切换之后，向目标CU发送RRC信令。
在一种可能的实现方式中，上述RRC信令中包括目标网络节点的第二切换完成信息，该第二切换完成信息用于指示已完成目标网络节点的切换。
在一种可能的实现方式中，上述第二切换完成信息为特定RLC信道中承载的信息。
本申请实施例提供的网络切换装置能够实现上述方法实施例中第一IAB节点实现的各个过程，为避免重复，具体描述此处不再赘述。
本申请实施例提供一种网络切换装置，由于网络切换装置在确定已完成向下游的网络节点发送对应的切换命令之后，才执行网络切换装置的切换过程，因此可以避免网络切换装置在未完成转发下游的网络节点的切换命令时进行网络切换，而导致无法向下游的网络节点发送切换命令的问题，从而可以保证下游的网络节点能够及时地切换到目标网络。
本申请实施例中的网络切换装置可以是装置，也可以是第一IAB节点中的部件、集成电路、或芯片。
图12示出了本申请实施例中涉及的网络切换装置的一种可能的结构示意图。如图12所示，本申请实施例提供的网络切换装置80可以包括：发送模块81。
其中，发送模块81，用于向待切换的IAB网络中的第一IAB节点发送第一切换命令和目标切换命令，该第一切换命令为第一IAB节点对应的切换命令，该目标切换命令包括IAB网络中处于第一IAB节点下游的所有网络节点对应的切换命令。其中，第一切换命令用于第一IAB节点在已完成向目标网络节点发送目标切换命令的情况下，执行第一IAB节点的切换过程，目标网络节点为IAB网络中处于第一IAB节点下游的一个子IAB节点或第一IAB节点服务的UE。
在一种可能的实现方式中，在第一IAB节点为IAB网络中最上游的一个网络节点情况下，第一切换命令是由源CU发送给第一IAB节点的。在第一IAB节点为IAB网络中任意一个下游的IAB节点的情况下，第一切换命令是由源CU通过处于第一IAB节点上游的网络节点转发给第一IAB节点的。
在一种可能的实现方式中，上述第一IAB节点为IAB网络中最上游的一个网络节点。上述发送模块81，具体用于优先向第一IAB节点发送目标切换命令，再向第一IAB节点发送第一切换命令。
在一种可能的实现方式中，上述发送模块81，具体用于向第一IAB节点发送至少一个信令容器，每个信令容器中分别包括IAB网络中的一个网络节点对应的切换命令，至少一 个信令容器为源CU直接发送给第一IAB节点的，或源CU通过处于第一IAB节点上游的网络节点转发给第一IAB节点的。其中，每个信令容器为无线资源控制RRC信令容器或F1-AP信令容器。
本申请实施例提供的网络切换装置能够实现上述方法实施例中源CU实现的各个过程，为避免重复，具体描述此处不再赘述。
本申请实施例提供一种网络切换装置，由于网络切换装置可以向第一IAB节点发送目标切换命令和第一切换命令，以使得第一IAB节点在已完成向目标网络节点发送目标切换命令的情况下，执行第一IAB节点的切换过程，因此可以避免第一IAB节点在未完成转发下游的网络节点的切换命令时进行网络切换，而导致无法向下游的网络节点发送切换命令的问题，从而可以保证下游的网络节点能够及时地切换到目标网络。
本申请实施例中的网络切换装置可以是装置，也可以是源CU中的部件、集成电路、或芯片。
可选地，如图13所示，本申请实施例还提供一种通信设备90，包括处理器91，存储器92，存储在存储器92上并可在所述处理器91上运行的程序或指令，例如，该通信设备90为IAB节点时，该程序或指令被处理器91执行时实现上述方法实施例中第一IAB节点实现的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。该通信设备90为CU时，该程序或指令被处理器91执行时实现上述方法实施例中源CU实现的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
本申请实施例还提供了一种IAB节点，图14为实现本申请实施例的一种IAB节点的硬件结构示意图。
如图14所示，该IAB节点100包括：天线101、射频装置102、基带装置103。天线101与射频装置102连接。在上行方向上，射频装置102通过天线101接收信息，将接收的信息发送给基带装置103进行处理。在下行方向上，基带装置103对要发送的信息进行处理，并发送给射频装置102，射频装置102对收到的信息进行处理后经过天线101发送出去。
上述频带处理装置可以位于基带装置103中，以上实施例中IAB节点执行的方法可以在基带装置103中实现，该基带装置103包括处理器104和存储器105。
基带装置103例如可以包括至少一个基带板，该基带板上设置有多个芯片，如图14所示，其中一个芯片例如为处理器104，与存储器105连接，以调用存储器105中的程序，执行以上方法实施例中所示的IAB节点操作。
该基带装置103还可以包括网络接口106，用于与射频装置102交互信息，该接口例如为通用公共无线接口(common public radio interface，CPRI)。
具体地，本申请实施例的IAB节点还包括：存储在存储器105上并可在处理器104上运行的指令或程序，处理器104调用存储器105中的指令或程序执行上述各模块执行的方法，并达到相同的技术效果，为避免重复，故不在此赘述。
本申请实施例还提供一种可读存储介质，该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。
其中，所述处理器为上述实施例中所述的终端中的处理器。所述可读存储介质，包括 计算机可读存储介质，如ROM、RAM、磁碟或者光盘等。
本申请实施例还提供一种CU，图15为实现本申请实施例的一种CU的硬件结构示意图。
CU 110包括但不限于：至少一个处理器111、存储器112、用户接口113和至少一个网络接口114。CU 110中的各个组件通过总线系统115耦合在一起。
需要说明的是，本领域技术人员可以理解，图15中示出的CU 110的结构并不构成对CU的限定，CU可以包括比图15所示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
本申请实施例中，至少一个网络接口114，用于向待切换的IAB网络中的第一IAB节点发送第一切换命令和目标切换命令，第一切换命令为第一IAB节点对应的切换命令，目标切换命令包括IAB网络中处于第一IAB节点下游的所有网络节点对应的切换命令。其中，第一切换命令用于第一IAB节点在已完成向目标网络节点发送目标切换命令的情况下，执行第一IAB节点的切换过程，目标网络节点为IAB网络中处于第一IAB节点下游的一个子IAB节点或第一IAB节点服务的UE。
本申请实施例中，由于源CU可以向第一IAB节点发送目标切换命令和第一切换命令，以使得第一IAB节点在已完成向目标网络节点发送目标切换命令的情况下，执行第一IAB节点的切换过程，因此可以避免第一IAB节点在未完成转发下游的网络节点的切换命令时进行网络切换，而导致无法向下游的网络节点发送切换命令的问题，从而可以保证下游的网络节点能够及时地切换到目标网络。
可以理解的是，总线系统115用于实现这些组件之间的连接通信。总线系统115除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见，在图15中将各种总线都标为总线系统115。
其中，用户接口113可以包括显示器、键盘或者点击设备(例如，鼠标，轨迹球、触感板或者触摸屏)等。
可以理解的是，本申请实施例中的存储器112可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDRSDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synch link DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DRRAM)。本申请实施例描述的存储器132旨在包括但不限于这些和任意其它适合类型的存储器。
在一些实施方式中，存储器112存储了如下的元素，可执行模块或者数据结构，或者他们的子集，或者他们的扩展集：操作系统1121和应用程序1122。
其中，操作系统1121，包含各种系统程序，例如框架层、核心库层、驱动层等，用于 实现各种基础业务以及处理基于硬件的任务。应用程序1122，包含各种应用程序，例如媒体播放器、浏览器等，用于实现各种应用业务。实现本申请实施例方法的程序可以包含在应用程序1122中。
本申请实施例中，CU 110还可以包括存储在存储器112上并可在处理器111上运行的程序或指令，该程序或指令被处理器111执行时实现本申请实施例提供的方法的步骤。
上述本申请实施例揭示的方法可以应用于处理器111中，或者由处理器111实现。处理器111可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法的各步骤可以通过处理器111中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器111可以是通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的计算机可读存储介质中。该计算机可读存储介质位于存储器112，处理器111读取存储器112中的信息，结合其硬件完成上述方法的步骤。具体地，该计算机可读存储介质上存储有程序或指令，程序或指令被处理器111执行时实现如本申请实施例提供的方法实施例的各步骤。
可以理解的是，本申请实施例描述的这些实施例可以用硬件、软件、固件、中间件、微码或其组合来实现。对于硬件实现，处理单元可以实现在一个或多个ASIC、DSP、数字信号处理设备(DSP device，DSPD)、可编程逻辑设备(programmable logic device，PLD)、FPGA、通用处理器、控制器、微控制器、微处理器、用于执行本申请所述功能的其它电子单元或其组合中。
对于软件实现，可通过执行本申请实施例所述功能的模块(例如过程、函数等)来实现本申请实施例所述的技术。软件代码可存储在存储器中并通过处理器执行。存储器可以在处理器中或在处理器外部实现。
本申请实施例还提供一种可读存储介质，该可读存储介质上存储程序或指令，该程序或指令被如图15所示的处理器111执行时实现上述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。其中，所述的计算机可读存储介质，如ROM、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通信设备程序或指令，实现上述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系统级芯片，系统芯片，芯片系统或片上系统芯片等。
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 (33)

  1. 一种网络切换方法，所述方法包括：
    在已完成向目标网络节点发送目标切换命令的情况下，第一自回传IAB节点根据已接收到的第一切换命令，执行所述第一IAB节点的切换过程，所述第一IAB节点为待切换的IAB网络中的IAB节点；
    其中，所述目标网络节点为所述IAB网络中处于所述第一IAB节点下游的一个子IAB节点或所述第一IAB节点服务的用户设备UE，所述目标切换命令包括所述IAB网络中处于所述第一IAB节点下游的所有网络节点对应的切换命令，所述第一切换命令为所述第一IAB节点对应的切换命令。
  2. 根据权利要求1所述的方法，其中，在所述第一IAB节点为所述IAB网络中最上游的一个网络节点情况下，所述第一切换命令是由源集中单元CU直接发送给所述第一IAB节点的；
    在所述第一IAB节点为所述IAB网络中任意一个下游的IAB节点的情况下，所述第一切换命令是由源CU通过处于所述第一IAB节点上游的网络节点转发给所述第一IAB节点的。
  3. 根据权利要求2所述的方法，其中，所述第一IAB节点为所述IAB网络中最上游的一个网络节点；
    所述在已完成向目标网络节点发送目标切换命令的情况下，第一IAB节点根据已接收到的第一切换命令，执行所述第一IAB节点的切换过程之前，所述方法还包括：
    所述第一IAB节点接收所述源CU发送的所述目标切换命令，并向所述目标网络节点发送所述目标切换命令；
    所述第一IAB节点接收所述源CU发送的所述第一切换命令。
  4. 根据权利要求1或2所述的方法，其中，所述在已完成向目标网络节点发送目标切换命令的情况下，第一IAB节点根据已接收到的第一切换命令，执行所述第一IAB节点的切换过程之前，所述方法还包括：
    所述第一IAB节点接收所述目标切换命令和所述第一切换命令，并在第一预设时长内，向所述目标网络节点发送所述目标切换命令，所述第一预设时长为从接收到所述目标切换命令和所述第一切换命令开始的预设时长；
    所述第一IAB节点根据已接收到的第一切换命令，执行所述第一IAB节点的切换过程，包括：
    在所述第一预设时长之后，所述第一IAB节点根据所述第一切换命令，执行所述第一IAB节点的切换过程。
  5. 根据权利要求1或2所述的方法，其中，所述在已完成向目标网络节点发送目标切换命令的情况下，第一IAB节点根据已接收到的第一切换命令，执行所述第一IAB节点的切换过程之前，所述方法还包括：
    所述第一IAB节点接收至少一个信令容器，每个信令容器中分别包括所述IAB网络中的一个网络节点对应的切换命令，所述至少一个信令容器为源CU直接发送给所述第一IAB节点的，或源CU通过处于所述第一IAB节点上游的网络节点转发给所述 第一IAB节点的；
    所述第一IAB节点根据所述至少一个信令容器，确定所述第一切换命令和所述目标切换命令，并根据所述至少一个信令容器的计数，确定是否已完成向所述目标网络节点发送所述目标切换命令；
    其中，每个信令容器为无线资源控制RRC信令容器或F1层应用协议F1-AP信令容器。
  6. 根据权利要求1所述的方法，其中，所述执行所述第一IAB节点的切换过程之后，所述方法还包括：
    若已完成所述第一IAB节点的切换，则所述第一IAB节点向目标CU发送第一切换完成信息，所述第一切换完成信息用于指示已完成所述第一IAB节点的切换。
  7. 根据权利要求1所述的方法，其中，所述执行所述第一IAB节点的切换过程之后，所述方法还包括：
    在接收到所述目标网络节点发送的RRC信令的情况下，若已完成所述第一IAB节点的切换，则所述第一IAB节点向目标CU发送所述RRC信令；
    在接收到所述目标网络节点发送的RRC信令的情况下，若未完成所述第一IAB节点的切换，则所述第一IAB节点缓存所述RRC信令，并在完成所述第一IAB节点的切换之后，向目标CU发送所述RRC信令。
  8. 根据权利要求7所述的方法，其中，所述RRC信令中包括所述目标网络节点的第二切换完成信息，所述第二切换完成信息用于指示已完成所述目标网络节点的切换。
  9. 根据权利要求8所述的方法，其中，所述第二切换完成信息为特定无线链路控制RLC信道中承载的信息。
  10. 一种网络切换方法，所述方法包括：
    源集中单元CU向待切换的自回传IAB网络中的第一IAB节点发送第一切换命令和目标切换命令，所述第一切换命令为所述第一IAB节点对应的切换命令，所述目标切换命令包括所述IAB网络中处于所述第一IAB节点下游的所有网络节点对应的切换命令；
    其中，所述第一切换命令用于所述第一IAB节点在已完成向目标网络节点发送所述目标切换命令的情况下，执行所述第一IAB节点的切换过程，所述目标网络节点为所述IAB网络中处于所述第一IAB节点下游的一个子IAB节点或所述第一IAB节点服务的用户设备UE。
  11. 根据权利要求10所述的方法，其中，在所述第一IAB节点为所述IAB网络中最上游的一个网络节点情况下，所述第一切换命令是由所述源CU发送给所述第一IAB节点的；
    在所述第一IAB节点为所述IAB网络中任意一个下游的IAB节点的情况下，所述第一切换命令是由所述源CU通过处于所述第一IAB节点上游的网络节点转发给所述第一IAB节点的。
  12. 根据权利要求11所述的方法，其中，所述第一IAB节点为所述IAB网络中最上游的一个网络节点；
    所述源CU向待切换的IAB网络中的第一IAB节点发送第一切换命令和目标切换命令，包括：
    所述源CU优先向所述第一IAB节点发送所述目标切换命令，再向所述第一IAB节点发送所述第一切换命令。
  13. 根据权利要求10或11所述的方法，其中，所述源CU向待切换的IAB网络中的第一IAB节点发送第一切换命令和目标切换命令，包括：
    所述源CU向所述第一IAB节点发送至少一个信令容器，每个信令容器中分别包括所述IAB网络中的一个网络节点对应的切换命令，所述至少一个信令容器为所述源CU直接发送给所述第一IAB节点的，或所述源CU通过处于所述第一IAB节点上游的网络节点转发给所述第一IAB节点的；
    其中，每个信令容器为无线资源控制RRC信令容器或F1层应用协议F1-AP信令容器。
  14. 一种网络切换装置，所述网络切换装置包括：执行模块；
    所述执行模块，用于在已完成向目标网络节点发送目标切换命令的情况下，根据已接收到的第一切换命令，执行待切换的自回传IAB网络中的第一IAB节点的切换过程；
    其中，所述目标网络节点为所述IAB网络中处于所述第一IAB节点下游的一个IAB节点，所述目标切换命令包括所述IAB网络中处于所述第一IAB节点下游的所有网络节点对应的切换命令，所述第一切换命令为所述第一IAB节点对应的切换命令。
  15. 根据权利要求14所述的装置，其中，在所述第一IAB节点为所述IAB网络中最上游的一个网络节点情况下，所述第一切换命令是由源集中单元CU直接发送给所述第一IAB节点的；
    在所述第一IAB节点为所述IAB网络中任意一个下游的IAB节点的情况下，所述第一切换命令是由源CU通过处于所述第一IAB节点上游的网络节点转发给所述第一IAB节点的。
  16. 根据权利要求15所述的装置，其中，所述第一IAB节点为所述IAB网络中最上游的一个网络节点；
    所述网络切换装置还包括：接收模块和发送模块；
    所述接收模块，用于在所述执行模块在已完成向目标网络节点发送目标切换命令的情况下，根据已接收到的第一切换命令，执行所述第一IAB节点的切换过程之前，接收所述源CU发送的所述目标切换命令；
    所述发送模块，用于向所述目标网络节点发送所述目标切换命令；
    所述接收模块，还用于接收所述源CU发送的所述第一切换命令。
  17. 根据权利要求14或15所述的装置，其中，所述网络切换装置还包括：接收模块和发送模块；
    所述接收模块，用于在所述执行模块在已完成向目标网络节点发送目标切换命令的情况下，根据已接收到的第一切换命令，执行所述第一IAB节点的切换过程之前，接收所述目标切换命令和所述第一切换命令；
    所述发送模块，用于在第一预设时长内，向所述目标网络节点发送所述目标切换 命令，所述第一预设时长为从接收到所述目标切换命令和所述第一切换命令开始的预设时长；
    所述执行模块，具体用于在所述第一预设时长之后，根据所述第一切换命令，执行所述第一IAB节点的切换过程。
  18. 根据权利要求14或15所述的装置，其中，所述网络切换装置还包括：接收模块和确定模块；
    所述接收模块，用于在所述执行模块在已完成向目标网络节点发送目标切换命令的情况下，根据已接收到的第一切换命令，执行所述第一IAB节点的切换过程之前，接收至少一个信令容器，每个信令容器中分别包括所述IAB网络中的一个网络节点对应的切换命令，所述至少一个信令容器为源CU直接发送给所述第一IAB节点的，或源CU通过处于所述第一IAB节点上游的网络节点转发给所述第一IAB节点的；
    所述确定模块，用于根据所述至少一个信令容器，确定所述第一切换命令和所述目标切换命令，并根据所述至少一个信令容器的计数，确定是否已完成向所述目标网络节点发送所述目标切换命令；
    其中，每个信令容器为无线资源控制RRC信令容器或F1层应用协议F1-AP信令容器。
  19. 根据权利要求14所述的装置，其中，所述网络切换装置还包括：发送模块；
    所述发送模块，用于在所述执行模块执行所述第一IAB节点的切换过程之后，若已完成所述第一IAB节点的切换，则向目标CU发送第一切换完成信息，所述第一切换完成信息用于指示已完成所述第一IAB节点的切换。
  20. 根据权利要求14所述的装置，其中，所述网络切换装置还包括：发送模块；
    所述发送模块，用于在所述执行模块执行所述第一IAB节点的切换过程之后，在接收到所述目标网络节点发送的RRC信令的情况下，若已完成所述第一IAB节点的切换，则向目标CU发送所述RRC信令；
    或者，
    所述网络切换装置还包括：缓存模块和发送模块；
    所述缓存模块，用于在接收到所述目标网络节点发送的RRC信令的情况下，若未完成所述第一IAB节点的切换，则缓存所述RRC信令；
    所述发送模块，用于在完成所述第一IAB节点的切换之后，向目标CU发送所述RRC信令。
  21. 根据权利要求20所述的装置，其中，所述RRC信令中包括所述目标网络节点的第二切换完成信息，所述第二切换完成信息用于指示已完成所述目标网络节点的切换。
  22. 根据权利要求21所述的装置，其中，所述第二切换完成信息为特定无线链路控制RLC信道中承载的信息。
  23. 一种网络切换装置，所述网络切换装置包括：发送模块；
    所述发送模块，用于向待切换的自回传IAB网络中的第一IAB节点发送第一切换命令和目标切换命令，所述第一切换命令为所述第一IAB节点对应的切换命令，所述目标切换命令包括所述IAB网络中处于所述第一IAB节点下游的所有网络节点对应的 切换命令；
    其中，所述第一切换命令用于所述第一IAB节点在已完成向目标网络节点发送所述目标切换命令的情况下，执行所述第一IAB节点的切换过程，所述目标网络节点为所述IAB网络中处于所述第一IAB节点下游的一个子IAB节点或所述第一IAB节点服务的用户设备UE。
  24. 根据权利要求23所述的装置，其中，在所述第一IAB节点为所述IAB网络中最上游的一个网络节点情况下，所述第一切换命令是由所述源CU发送给所述第一IAB节点的；
    在所述第一IAB节点为所述IAB网络中任意一个下游的IAB节点的情况下，所述第一切换命令是由所述源CU通过处于所述第一IAB节点上游的网络节点转发给所述第一IAB节点的。
  25. 根据权利要求24所述的装置，其中，所述第一IAB节点为所述IAB网络中最上游的一个网络节点；
    所述发送模块，具体用于优先向所述第一IAB节点发送所述目标切换命令，再向所述第一IAB节点发送所述第一切换命令。
  26. 根据权利要求23或24所述的装置，其中，所述发送模块，具体用于向所述第一IAB节点发送至少一个信令容器，每个信令容器中分别包括所述IAB网络中的一个网络节点对应的切换命令，所述至少一个信令容器为所述源CU直接发送给所述第一IAB节点的，或所述源CU通过处于所述第一IAB节点上游的网络节点转发给所述第一IAB节点的；
    其中，每个信令容器为无线资源控制RRC信令容器或F1层应用协议F1-AP信令容器。
  27. 一种自回传IAB节点，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至9中任一项所述的网络切换方法的步骤。
  28. 一种集中单元CU，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10至13中任一项所述的网络切换方法的步骤。
  29. 一种通信系统，所述通信系统包括如权利要求14至22中任一项所述的网络切换装置和如权利要求23至26中任一项所述的网络切换装置；或者，
    所述通信系统包括如权利要求27所述的自回传IAB节点和如权利要求28所述的集中单元CU。
  30. 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至9中任一项所述的网络切换方法的步骤，或者如权利要求10至13中任一项所述的网络切换方法的步骤。
  31. 一种计算机程序产品，所述程序产品被至少一个处理器执行以实现如权利要求1至9中任一项所述的网络切换方法，或者实现如权利要求10至13中任一项所述的网络切换方法。
  32. 一种自回传IAB节点，包括所述IAB节点被配置成用于执行如权利要求1至 9中任一项所述的网络切换方法。
  33. 一种集中单元CU，包括所述CU被配置成用于执行如权利要求10至13中任一项所述的网络切换方法。
PCT/CN2021/098101 2020-06-03 2021-06-03 网络切换方法、装置、通信设备及系统 WO2021244605A1 (zh)

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