WO2022078112A1 - 连接建立方法、装置、设备及存储介质 - Google Patents

连接建立方法、装置、设备及存储介质 Download PDF

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Publication number
WO2022078112A1
WO2022078112A1 PCT/CN2021/117016 CN2021117016W WO2022078112A1 WO 2022078112 A1 WO2022078112 A1 WO 2022078112A1 CN 2021117016 W CN2021117016 W CN 2021117016W WO 2022078112 A1 WO2022078112 A1 WO 2022078112A1
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Prior art keywords
node
iab node
target host
iab
host
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PCT/CN2021/117016
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English (en)
French (fr)
Inventor
刘子乔
王达
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大唐移动通信设备有限公司
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Publication of WO2022078112A1 publication Critical patent/WO2022078112A1/zh

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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a connection establishment method, apparatus, device, and storage medium.
  • IAB integrated access and backhaul
  • Intra-host migration refers to the switching of the IAB node and its descendant nodes from one distributed unit of the host to another distributed unit, which does not involve the switching of the host, and does not involve the establishment of a new F1 connection.
  • the IAB node and its descendant nodes need to establish a new F1 connection with the target host.
  • the related art does not involve how the IAB node and its descendant nodes establish a new F1 connection with the target host. connect.
  • the present application provides a connection establishment method, apparatus, device and storage medium.
  • a method for establishing a connection is provided.
  • the method is applied to an integrated IAB node for access and backhaul, and the method includes:
  • the target host is the IAB node to be switched to Host;
  • the F1 message carries RRC signaling
  • the sending indication information to the child nodes of the IAB node includes:
  • the RRC signaling is sent to the child node of the IAB node to trigger F1 connection establishment or migration of the child node.
  • the sending indication information to the child nodes of the IAB node includes:
  • the backhaul adaptation protocol BAP layer signaling is sent to the child node of the IAB node, which is used to trigger the establishment or migration of the F1 connection of the child node.
  • the sending indication information to the child nodes of the IAB node includes:
  • the F1 interface signaling is sent to the child node of the IAB node to trigger the establishment or migration of the F1 connection of the child node.
  • the IAB node includes a top-level migration node or a non-top-level migration node.
  • the IAB node is a top-level migration node that is switched to the target host;
  • the method further includes:
  • the IAB node is reconfigured according to the configuration parameters of the IAB node.
  • the RRC reconfiguration message also carries the global cell identifier CGI of the access node under the target host;
  • the method further includes:
  • the random access process is performed according to the CGI of the access node under the target host.
  • the RRC reconfiguration message also carries information about a default channel and a default route between the target host and the IAB node;
  • the sending an F1 connection establishment request to the target host includes:
  • the F1 connection establishment request is sent to the target host using the default channel and the default route.
  • the IAB node is a non-top-level migration node that is switched to the target host;
  • the method further includes:
  • the method further includes:
  • the default channel is a default backhaul radio link control BH RLC channel; the default route is a default backhaul adaptation protocol BAP identification route.
  • a method for establishing a connection is provided, the method is applied to a target host, and the method includes:
  • the F1 connection establishment request is used to request the establishment of the IAB node and the target host F1 connection between;
  • the sending an F1 connection establishment success indication and indication information to the IAB node includes:
  • the F1 message carries RRC signaling, which is used to trigger the establishment or migration of the F1 connection of the child node of the IAB node.
  • the sending an F1 connection establishment success indication and indication information to the IAB node includes:
  • An F1 interface signaling is sent to the IAB node, which is used to trigger the establishment or migration of the F1 connection of the child nodes of the IAB node.
  • the method before the receiving and returning the F1 connection establishment request of the integrated IAB node, the method further includes:
  • the handover response carries an RRC reconfiguration message of the IAB node for reconfiguring the IAB node.
  • the IAB node includes a top-level migration node or a non-top-level migration node.
  • the IAB node is a top-level migration node that is switched to the target host;
  • the method also includes:
  • RRC reconfiguration complete message sent by the IAB node, where the RRC reconfiguration complete message is a message sent by the IAB node after performing reconfiguration according to the RRC reconfiguration message.
  • the IAB node is a non-top-level migration node that is switched to the target host;
  • the method also includes:
  • the number of the IAB nodes is multiple, and the number of the RRC reconfiguration messages is multiple;
  • the handover response carries an RRC reconfiguration message sequence, which is used to sequentially send a plurality of the RRC reconfiguration messages according to the RRC reconfiguration message sequence.
  • the method before the sending a handover response to the source host, the method further includes:
  • the method before the sending a handover response to the source host, the method further includes:
  • an integrated IAB node for access and backhaul includes a memory, a transceiver, and a processor:
  • a memory for storing a computer program
  • a transceiver for sending and receiving data under the control of the processor
  • a processor for reading the computer program in the memory and performing the following operations:
  • the target host is the IAB node to be switched to Host;
  • the F1 message carries RRC signaling
  • the sending indication information to the child nodes of the IAB node includes:
  • the RRC signaling is sent to the child node of the IAB node to trigger F1 connection establishment or migration of the child node.
  • the sending indication information to the child nodes of the IAB node includes:
  • the backhaul adaptation protocol BAP layer signaling is sent to the child node of the IAB node, which is used to trigger the establishment or migration of the F1 connection of the child node.
  • the sending indication information to the child nodes of the IAB node includes:
  • the F1 interface signaling is sent to the child node of the IAB node to trigger the establishment or migration of the F1 connection of the child node.
  • the IAB node includes a top-level migration node or a non-top-level migration node.
  • the IAB node is a top-level migration node that is switched to the target host;
  • the method further includes:
  • the IAB node is reconfigured according to the configuration parameters of the IAB node.
  • the RRC reconfiguration message also carries the global cell identifier CGI of the access node under the target host;
  • the method further includes:
  • the random access process is performed according to the CGI of the access node under the target host.
  • the RRC reconfiguration message also carries information about a default channel and a default route between the target host and the IAB node;
  • the sending an F1 connection establishment request to the target host includes:
  • the F1 connection establishment request is sent to the target host using the default channel and the default route.
  • the IAB node is a non-top-level migration node that is switched to the target host;
  • the method further includes:
  • the method further includes:
  • the default channel is a default backhaul radio link control BH RLC channel; the default route is a default backhaul adaptation protocol BAP identification route.
  • a target host including a memory, a transceiver, and a processor:
  • a memory for storing a computer program
  • a transceiver for sending and receiving data under the control of the processor
  • a processor for reading the computer program in the memory and performing the following operations:
  • the F1 connection establishment request is used to request the establishment of the IAB node and the target host F1 connection between;
  • the sending an F1 connection establishment success indication and indication information to the IAB node includes:
  • the F1 message carries RRC signaling, which is used to trigger the establishment or migration of the F1 connection of the child node of the IAB node.
  • the sending an F1 connection establishment success indication and indication information to the IAB node includes:
  • An F1 interface signaling is sent to the IAB node, which is used to trigger the establishment or migration of the F1 connection of the child node of the IAB node.
  • the method before receiving the F1 connection establishment request of the integrated IAB node for access and return, the method further includes:
  • the handover response carries an RRC reconfiguration message of the IAB node for reconfiguring the IAB node.
  • the IAB node includes a top-level migration node or a non-top-level migration node.
  • the IAB node is a top-level migration node that is switched to the target host;
  • the processor also performs the following operations:
  • RRC reconfiguration complete message sent by the IAB node, where the RRC reconfiguration complete message is a message sent by the IAB node after performing reconfiguration according to the RRC reconfiguration message.
  • the IAB node is a non-top-level migration node that is switched to the target host;
  • the processor also performs the following operations:
  • the number of the IAB nodes is multiple, and the number of the RRC reconfiguration messages is multiple;
  • the handover response carries an RRC reconfiguration message sequence, which is used to sequentially send a plurality of the RRC reconfiguration messages according to the RRC reconfiguration message sequence.
  • the method before the sending a handover response to the source host, the method further includes:
  • the method before the sending a handover response to the source host, the method further includes:
  • a connection establishment apparatus is provided, the apparatus is applied to an integrated IAB node for access and backhaul, and the apparatus includes:
  • a sending unit configured to send an F1 connection establishment request to the target host, wherein the F1 connection establishment request is used to request the establishment of an F1 connection between the IAB node and the target host;
  • the target host is the IAB The host to which the node is to be switched;
  • a receiving unit configured to receive the F1 message sent by the target host
  • the sending unit is further configured to send indication information to the child nodes of the IAB node, where the indication information is used to trigger F1 connection establishment or migration of the child nodes of the IAB node.
  • a connection establishment apparatus is provided, the apparatus is applied to a target host, and the apparatus includes:
  • a receiving unit configured to receive an F1 connection establishment request for accessing the integrated IAB node, wherein the target host is the host to which the IAB node is to be switched; the F1 connection establishment request is used to request the establishment of the IAB node an F1 connection with the target host;
  • the sending unit is configured to send an F1 connection establishment success indication and indication information to the IAB node, wherein the indication information is used to trigger the F1 connection establishment or migration of the child nodes of the IAB node.
  • a processor-readable storage medium stores a computer program, and the computer program is used to cause the processor to execute a program for Access the connection establishment method of the backhaul integrated IAB node, or execute the connection establishment method for the target host.
  • the F1 connection establishment request is used to request the establishment of an F1 connection between the IAB node and the target host;
  • the target host is the host to which the IAB node is to be switched to ;
  • the IAB node can send indication information to the child node, which is used to trigger the establishment or migration of the F1 connection of the child node, so as to realize the establishment of a new F1 connection or migration between the IAB node and its descendant nodes and the target host.
  • FIG. 1 is a schematic flowchart of a method for establishing a connection according to an embodiment of the present application
  • connection establishment method 2 is a schematic flowchart of another connection establishment method provided according to an embodiment of the present application.
  • Fig. 3 is the schematic diagram of the relationship between the IAB node and the source host before handover;
  • Fig. 4 is a schematic diagram of the relationship between the IAB node and the target host after switching
  • FIG. 5 is a signaling interaction diagram of an IAB node, a source host and a target host under an embodiment
  • FIG. 6 is a signaling interaction diagram of an IAB node, a source host and a target host under another embodiment
  • FIG. 7 is a signaling interaction diagram of an IAB node, a source host and a target host under another embodiment
  • FIG. 8 is a signaling interaction diagram of an IAB node, a source host and a target host under another embodiment
  • FIG. 9 is a schematic structural diagram of an IAB node provided according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a target host provided according to an embodiment of the present application.
  • connection establishment apparatus provided according to an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a connection establishment apparatus provided according to an embodiment of the present application.
  • Intra-host migration refers to the switching of the IAB node and its descendant nodes from one distributed unit of the host to another distributed unit, which does not involve the switching of the host, and does not involve the establishment of a new F1 connection.
  • the IAB node needs to be migrated between hosts, the IAB node and its descendant nodes need to establish a new F1 connection with the target host.
  • the related art does not involve how the IAB node and its descendant nodes establish a new F1 connection with the target host. connect.
  • connection establishment method By sending an F1 connection establishment request to the target host, the F1 connection establishment request is used to request the establishment of an F1 connection between the IAB node and the target host; the target host is the host to which the IAB node is to be switched to ; receive the F1 message sent by the target host; send indication information to the child node of the IAB node, where the indication information is used to trigger the establishment or migration of the F1 connection of the child node of the IAB node.
  • the IAB node can send indication information to the child node to trigger the establishment or migration of the F1 connection of the child node, so as to realize the establishment of a new F1 connection or migration between the IAB node and its descendants and the target host.
  • connection establishment method, apparatus, device, and storage medium of this embodiment are described below with reference to the accompanying drawings.
  • the technical solutions provided in the embodiments of the present application may be applicable to various systems, especially 5G systems.
  • the applicable system may be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) general packet Wireless service (general packet radio service, GPRS) system, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, Long term evolution advanced (LTE-A) system, universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) system, 5G New Radio (New Radio, NR) system, etc.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA wideband Code Division Multiple Access
  • general packet Wireless service general packet Radio service
  • GPRS general packet Wireless service
  • LTE long term evolution
  • FIG. 1 is a schematic flowchart of a connection establishment method provided according to an embodiment of the present application, and the information processing method is applied to an integrated access and backhaul (Integrated Access and Backhaul, IAB) node.
  • IAB integrated Access and Backhaul
  • the method includes:
  • Step 11 Send an F1 connection establishment request to the target host, wherein the F1 connection establishment request is used to request to establish an F1 connection between the IAB node and the target host; the target host is the host to which the IAB node is to be switched.
  • the IAB node in the embodiment of the present application includes a top-level migration node or a non-top-level migration node that switches from a source host to a target host; wherein, the top-level migration node is an IAB node that needs to be switched from the source host to the target host, and the source host is the same as the source host.
  • the node with the least number of node hops between hosts, the parent node of the IAB node does not need to perform host switching.
  • Non-top-level migration nodes are descendants of top-level migration nodes.
  • the IAB node may be a top-level migration node that is handed over to the target host.
  • the IAB node may perform the following steps: receive an RRC reconfiguration message sent by the source host, wherein the RRC reconfiguration message is carried in the handover response sent by the target host to the source host, and the RRC reconfiguration message is The configuration message carries the configuration parameters of the IAB node; the source host is the host before the IAB node is switched; and the IAB node is reconfigured according to the configuration parameters of the IAB node.
  • the IAB node is a top-level migration node that switches to the target host. After reconfiguration, the IAB node can send an F1 connection establishment request to the target host to establish an F1 connection with the target host.
  • the RRC reconfiguration message also carries the information of the default channel and the default route between the target host and the IAB node.
  • the IAB node can send an RRC reconfiguration complete message to the target host by using the default channel and default route, and send the RRC reconfiguration complete message of the IAB node to the target host in time.
  • the default channel is a default backhaul radio link control (Backhaul Radio Link Control, BH RLC) channel;
  • the default route is a default backhaul adaptation protocol (Backhaul Adaptation Protocol, BAP) identification route.
  • BAP Backhaul Adaptation Protocol
  • the RRC reconfiguration message also carries the global cell identifier (Cell Global Identifier, CGI) of the access node under the target host.
  • CGI Cell Global Identifier
  • the IAB node may further perform the following steps: perform a random access process according to the CGI of the access node under the target host. After the random access is completed, the default channel between the IAB node and the target host is connected, so that the IAB node can send an F1 connection establishment request to the target host by using the default channel and the default route.
  • the configuration parameters of the IAB node carry the target global cell identifier CGI reassigned by the target host to the IAB node.
  • the random access request sent by the IAB node to the access node carries Having the target CGI of the IAB node enables the access node to know the target CGI of the IAB node.
  • the IAB node may be a non-top-level migration node that is handed over to the target host.
  • the IAB node may perform the following steps: receive an RRC reconfiguration message sent by the parent node of the IAB node, wherein the RRC reconfiguration message is carried in the handover response sent by the target host to the source host , sent by the source host to the parent node; the source host is the host before the IAB node is switched; the IAB node is reconfigured according to the RRC reconfiguration message; and the instruction information sent by the parent node is received.
  • the IAB node is a top-level migration node that is switched to the target host, and after reconfiguration, it needs to wait for the instruction information sent by the parent node. After receiving the instruction information sent by the parent node, it is determined that the establishment of the F1 connection of the parent node is completed, so that an F1 connection establishment request can be sent to the target host to establish an F1 connection with the target host.
  • the RRC reconfiguration message also carries the information of the default channel and default route between the target host and the IAB node; after the reconfiguration is performed and the instruction information sent by the parent node is received, the IAB node is determined. Connect with the default channel between the target host, so that the IAB node can send the F1 connection establishment request to the target host by using the default channel and the default route.
  • an RRC reconfiguration complete message is sent to the parent node for sending the RRC reconfiguration complete message to the target host through the F1 connection between the parent node and the target host.
  • Step 12 Receive the F1 message sent by the target host.
  • Step 13 Send indication information to the child nodes of the IAB node, where the indication information is used to trigger F1 connection establishment or migration of the child nodes of the IAB node.
  • the F1 message may be, for example, an F1 connection establishment response message, which carries RRC signaling.
  • the process of the IAB node performing step 13 may specifically be: sending the RRC signaling to the sub-nodes of the IAB node to trigger the establishment or migration of the F1 connection of the sub-nodes.
  • the target host when the target host sends the F1 message to the IAB node, the F1 connection has not been established between the child nodes of the IAB node and the target host, and the child nodes of the IAB node may not have been reconfigured. Therefore, it is necessary to pass the IAB node.
  • the IAB node can send RRC signaling to the child node through the Uu interface with the child node.
  • the process of the IAB node performing step 13 may specifically be: sending back-transmission adaptation protocol BAP layer signaling to the child nodes of the IAB node for triggering F1 connection establishment or migration of the child nodes.
  • the process of the IAB node performing step 13 may specifically be: receiving the F1 interface signaling sent by the target host; sending F1 interface signaling to the child node of the IAB node, which is used to trigger the establishment of the F1 connection of the child node or migrate.
  • the target host can send the F1 interface signaling to the IAB node through the F1 connection with the IAB node, and the IAB node sends the sub-node through the Uu interface between the IAB node and the sub-node.
  • the node sends F1 interface signaling to trigger the establishment or migration of the F1 connection of the child node.
  • triggering the establishment of the F1 connection of the child node means that in the inter-host switching (inter-CU) scenario, the child node switches from the source host to the target host, and a new F1 connection needs to be established with the target host. After receiving the indication information, the child node sends an F1 connection establishment request to the target host.
  • Triggering the F1 connection migration of the child node means that in the intra-host switching (intra-CU) scenario, the child node switches from one distributed unit of the same host to another distributed unit, and the child node is not connected to the host's F1 connection. changes, but needs to be migrated from one distributed unit to another.
  • the embodiment of the present application provides a connection establishment method, by sending an F1 connection establishment request to a target host, wherein the F1 connection establishment request is used to request to establish an F1 connection between the IAB node and the target host; the target host The host is the host to which the IAB node is to be switched; receives the F1 message sent by the target host; and sends indication information to the child nodes of the IAB node, where the indication information is used to trigger the establishment or migration of the F1 connection of the child nodes of the IAB node.
  • the IAB node can send indication information to the child node, which is used to trigger the establishment or migration of the F1 connection of the child node, so as to realize the establishment of a new F1 connection or migration between the IAB node and its descendant nodes and the target host.
  • FIG. 2 is a schematic flowchart of another connection establishment method provided according to an embodiment of the present application. The method is applied in the target host.
  • connection establishment method may include:
  • Step 21 Receive the F1 connection establishment request of the integrated IAB node for access and return, wherein the target host is the host to which the IAB node is to be switched; the F1 connection establishment request is used to request the establishment of the F1 connection between the IAB node and the target host .
  • the IAB node in the embodiment of the present application includes a top-level migration node or a non-top-level migration node that switches from a source host to a target host; wherein, the top-level migration node is an IAB node that needs to be switched from the source host to the target host, and the source host The node with the least number of hops between nodes, the parent node of the IAB node does not need to perform home switching.
  • Non-top-level migration nodes are descendants of top-level migration nodes.
  • the IAB node may be a top-level migration node that is handed over to the target host.
  • the target host may further perform the following steps: receiving an RRC reconfiguration complete message sent by the IAB node, wherein the RRC reconfiguration complete message is a message sent by the IAB node after reconfiguration according to the RRC reconfiguration message.
  • the RRC reconfiguration message carries the configuration parameters of the IAB node, the default channel and default route information between the target host and the IAB node.
  • the configuration parameters of the IAB node are used to reconfigure the IAB node.
  • the target host using the default channel and default route between the target host and the IAB node, the target host can receive the RRC reconfiguration complete message sent by the IAB node, receive the F1 connection establishment request sent by the IAB node, and send The IAB node sends the F1 message.
  • the target host can receive the F1 connection establishment request sent by the IAB node, and send the F1 message to the IAB node. After the F1 connection is successfully established , and receive the RRC reconfiguration complete message sent by the IAB node through the F1 connection.
  • the IAB node may be a non-top-level migration node that is handed over to the target host.
  • the target host may also perform the following steps: receive an RRC reconfiguration complete message sent by the parent node of the IAB node, wherein the RRC reconfiguration complete message is sent to the parent after the IAB node performs reconfiguration according to the RRC reconfiguration message. node, sent by the parent node through the F1 connection with the target host.
  • the RRC reconfiguration message carries the configuration parameters of the IAB node, the default channel and default route information between the target host and the IAB node.
  • the configuration parameters of the IAB node are used to reconfigure the IAB node; using the default channel and default route between the target host and the IAB node, the target host can receive the F1 connection establishment request sent by the IAB node, and send to the IAB node. F1 news.
  • Step 22 Send an F1 connection establishment success indication and indication information to the IAB node, where the indication information is used to trigger the F1 connection establishment or migration of the child nodes of the IAB node.
  • the process of performing step 22 by the target host may specifically be: sending an F1 message to the IAB node to indicate that the F1 connection of the IAB node is successfully established; wherein, the F1 message carries RRC signaling, which is used to trigger the IAB node's F1 connection.
  • the F1 connection of the child node is established or migrated.
  • the target host when the target host sends the F1 message to the IAB node, the F1 connection has not been established between the child nodes of the IAB node and the target host, and the child nodes of the IAB node may not have been reconfigured. Therefore, it is necessary to pass the IAB node.
  • the IAB node can send RRC signaling to the child node through the Uu interface with the child node.
  • the process of the target host performing step 22 may specifically be: sending an F1 message to the IAB node to indicate that the IAB node F1 connection is successfully established; sending an F1 interface signaling to the IAB node to trigger the IAB node The F1 connection of the child node is established or migrated.
  • the target host can send the F1 interface signaling to the IAB node through the F1 connection with the IAB node, and the IAB node sends the sub-node through the Uu interface between the IAB node and the sub-node.
  • the node sends F1 interface signaling to trigger the establishment or migration of the F1 connection of the child node.
  • triggering the establishment of the F1 connection of the child node means that the child node switches from the source host to the target host, and a new F1 connection needs to be established with the target host. After receiving the indication information, the node sends an F1 connection establishment request to the target host.
  • triggering the F1 connection migration of the child node refers to migrating the F1 connection request between the child node and the source host to the child node and the target host.
  • triggering the migration of the F1 connection of the child node means that the child node switches from one distributed unit of the same host to another distributed unit, and the F1 connection of the child node and the host is not connected. changes, but needs to be migrated from one distributed unit to another.
  • the target host may also perform the following steps: receiving a handover request sent by the source host, where the source host is the host before the IAB node handover; sending a handover response to the source host, wherein the handover response carries There is an RRC reconfiguration message of the IAB node, which is used to reconfigure the IAB node.
  • the handover request carries any one or more of the following information: (1) the context information of the top-level migration node and its descendant nodes; (2) the user equipment (User Equipment, UE) context information, and context information of the user equipment UE under the descendant node; (3) topology information between the top-level migration node and its descendant nodes.
  • the handover response carries: the RRC reconfiguration message of the top migration node, the RRC reconfiguration message of the descendant nodes of the top migration node, and the RRC reconfiguration message of the user equipment UE under the top migration node and the descendant node.
  • the UE in this embodiment of the present application may be a terminal device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem.
  • the name of the terminal device may be different.
  • the terminal device may be called User Equipment (UE).
  • Wireless terminal equipment can communicate with one or more core networks (Core Network, CN) via a radio access network (Radio Access Network, RAN).
  • RAN Radio Access Network
  • "telephone) and computers with mobile terminal equipment eg portable, pocket-sized, hand-held, computer-built or vehicle-mounted mobile devices, which exchange language and/or data with the radio access network.
  • Wireless terminal equipment may also be referred to as system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point , a remote terminal device (remote terminal), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), and a user device (user device), which are not limited in the embodiments of the present application.
  • the number of IAB nodes is multiple, and the number of RRC reconfiguration messages is multiple; the handover response carries the RRC reconfiguration message sequence, which is used for multiple RRC reconfiguration messages according to the RRC reconfiguration message sequence Send in sequence.
  • the target host before sending a handover response to the source host, may also perform the following steps: determine the number of node hops between multiple IAB nodes and the target host; Sort the RRC reconfiguration messages of multiple IAB nodes in ascending order to obtain the RRC reconfiguration message sequence.
  • the target host before sending a handover response to the source host, may also perform the following steps: determine the number of node hops between multiple IAB nodes and the target host; The reconfiguration messages are sorted in descending order to obtain the RRC reconfiguration message sequence.
  • the ascending order means that the IAB nodes with fewer node hops are sorted first, and the IAB nodes with more node hops are ranked last, and the RRC reconfiguration can be sent to the IAB nodes with fewer node hops first. message, and then send an RRC reconfiguration message to the IAB node with more node hops, in which the node hop between the top-level migration node and the target host is the least, so that the IAB node with fewer node hops can be reconfigured in time and F1 connection established.
  • the node hop count refers to the number of nodes that need to be jumped from the IAB node to the target host.
  • the number of node hops between IAB node 4 and the target host is 2, and the IAB node
  • the node hop count between 2 and the target host is 1, and the node hop count between IAB node 5 and the target host is 3.
  • the descending order means that the IAB nodes with more node hops are sorted first, and the IAB nodes with less node hops are sorted last, and the RRC reconfiguration can be sent to the IAB nodes with more node hops first. message, and then send an RRC reconfiguration message to the IAB node with fewer node hops.
  • the number of node hops between the top-level migration node and the target host is the least, so that after the F1 connection of the top-level migration node is successfully established, the descendants can be updated in time.
  • the nodes perform F1 connection establishment, which shortens the total time consumed by the F1 connection establishment of each IAB node.
  • the target host is the host to which the IAB node is to be switched; the F1 connection establishment request is used to request the establishment of the IAB node and the F1 connection between target hosts; send an F1 connection establishment success indication and indication information to the IAB node, wherein the indication information is used to trigger the F1 connection establishment or migration of the child node of the IAB node.
  • the instruction information can be sent to the child nodes of the IAB node to trigger the establishment or migration of the F1 connection of the child node, so that the IAB node and its descendant nodes can establish a new F1 connection with the target host or migrate.
  • the nodes in the connection establishment process are described with the schematic diagram of the relationship between the IAB node and the source host before the handover shown in FIG. 3 and the schematic diagram of the relationship between the IAB node and the target host after the handover shown in FIG. 4 .
  • the host includes an IAB host centralized unit (IAB donor CU, IAB donor Centralized Unit) and an IAB host distributed unit (IAB donor DU, IAB donor Distributed Unit). Multiple IAB donor DUs can be connected to one IAB donor CU.
  • the IAB node includes an IAB node Distributed Unit (IAB node Distributed Unit, IAB node DU) and an IAB node Mobile Terminal (IAB node Mobile Termination, IAB node MT).
  • IAB node Distributed Unit IAB node Distributed Unit
  • IAB node Mobile Termination IAB node MT
  • the IAB node DU is connected to the IAB donor CU through the F1 interface
  • the IAB node MT is connected to the IAB node DU of the next layer through the Uu interface. If a user equipment UE is connected under an IAB node, the IAB node DU is connected to the UE.
  • the CU on the left represents the source-host centralized unit
  • the first DU on the left represents the source-host distributed unit.
  • the first group of MTs and DUs on the left are the mobile terminals and distributed units of the IAB node 1 under the source host respectively
  • the second group of MTs and DUs on the left are the mobile terminals and distributed units of the IAB node 3 under the source host respectively
  • the third group of MTs and DUs are the mobile terminals and distributed units of the IAB node 5 under the source host before handover
  • the fourth group of MTs and DUs are the mobile terminals and distributed units of the IAB node 6 under the source host before the handover
  • the fifth group of MTs and DU are the mobile terminals and distributed units of the IAB node 7 under the source host before the handover
  • UE represents the user terminal under the node 7 before the handover.
  • the CU on the right represents the target host centralized unit.
  • the first DU on the right represents the target host distributed unit.
  • the first group of MTs and DUs on the right are the mobile terminals and distributed units of the IAB node 2 under the target host, respectively;
  • the second group of MTs and DUs on the right are the mobile terminals and distributed units of the IAB node 4 under the target host, respectively.
  • the IAB node 5 is a top-level migration node that switches from the source host to the target host.
  • IAB node 6 and IAB node 7 are descendant nodes of IAB node 5.
  • the IAB node 5 , the IAB node 6 , the IAB node 7 and the UE are the IAB nodes and devices to be migrated to the target host.
  • the IAB node involved in the embodiment of the present application is a network side device, which may be a base station, and the base station may include a plurality of cells providing services for the terminal.
  • the base station may also be called an access point, or may be a device in the access network that communicates with wireless terminal equipment through one or more sectors on the air interface, or other names.
  • the network-side equipment can be used to exchange received air frames with Internet Protocol (IP) packets, and act as a router between the wireless terminal equipment and the rest of the access network, where the rest of the access network can include Internet Protocol (IP) communication network.
  • IP Internet Protocol
  • the network side equipment can also coordinate the attribute management of the air interface.
  • the network-side device involved in the embodiments of the present application may be a network-side device (Base Transceiver Station) in a Global System for Mobile Communications (GSM) or a Code Division Multiple Access (Code Division Multiple Access, CDMA).
  • BTS Global System for Mobile Communications
  • BTS can also be a network side device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or it can be an evolution in a long term evolution (LTE) system type network side equipment (evolutional Node B, eNB or e-NodeB), 5G base station (gNB) in 5G network architecture (next generation system), or Home evolved Node B (HeNB), relay node (relay node), home base station (femto), pico base station (pico), etc., are not limited in the embodiments of this application.
  • the network-side device may include a centralized unit (centralized unit, CU) node and a distributed unit (distributed unit, DU) node, and the centralized unit and
  • the RRC signaling that triggers the F1 connection establishment or migration of the sub-node is carried in the F1 connection establishment response message, or sent by the IAB node through BAP layer signaling
  • the source-donor starts to send the RRC reconfiguration message from the user equipment UE with the largest number of node hops.
  • Figure 5 it is a signaling interaction diagram of the IAB node, the source host and the target host in the implementation of the above embodiment, including the following steps:
  • Step 1 the source host sends a handover request (Xn handover request) to the target host, requesting to migrate the IAB node 5, its descendant nodes and UE below it to the IAB DONOR CU2 (representing the target host).
  • Xn handover request a handover request
  • the source host is represented by IAB DONOR CU1 in Figure 5.
  • Step 2 the target host sends a handover response (Xn handover request ACK) to the source host, which carries the RRC reconfiguration message of each IAB node and the UE.
  • Xn handover request ACK a handover response
  • Step 3 the source donor sends the RRC reconfiguration message (RRC reconfiguration) of the UE to the distributed unit of the IAB node 7, and the IAB node 7 sends the RRC reconfiguration message of the UE to the UE through the Uu interface.
  • RRC reconfiguration RRC reconfiguration
  • Step 4 the UE sends an RRC reconfiguration complete message (RRC reconfiguration complete) of the UE to the IAB node 7.
  • Step 5 the source host sends the RRC reconfiguration message of the IAB node 7 to the distributed unit of the IAB node 6, and the IAB node 6 sends the RRC reconfiguration message of the IAB node 7 to the IAB node 7 through the Uu interface.
  • Step 6 the IAB node 7 sends the RRC reconfiguration complete message of the IAB node 7 to the IAB node 6.
  • Step 7 the source host sends the RRC reconfiguration message of the IAB node 6 to the distributed unit of the IAB node 5, and the IAB node 5 sends the RRC reconfiguration message of the IAB node 6 to the IAB node 6 through the Uu interface.
  • Step 8 the IAB node 6 sends the IAB node 5 RRC reconfiguration complete message to the IAB node 5 .
  • Step 9 the source host sends the RRC reconfiguration message of the IAB node 5 to the distributed unit of the IAB node 5 .
  • Step 10 the IAB node 5 randomly accesses the access node (the IAB node 4 under the target host).
  • Step 11 the IAB node 5 sends an RRC reconfiguration complete message to the target host through the default channel and the default route in the RRC reconfiguration message.
  • Step 12 the IAB node 5 sends an F1 connection establishment request (F1 setup request) to the target host.
  • Step 13 the target host sends an F1 connection establishment response message (F1 setup response) to the IAB node 5, which carries the RRC signaling of the IAB node 6.
  • Step 14 the IAB node 5 sends RRC signaling to the IAB node 6 to instruct the IAB node 6 to establish the F1 connection.
  • step 13 and step 14 may be replaced by step 13' and step 14' in FIG. 5 .
  • Step 13' is an F1 connection establishment response message that does not carry RRC signaling;
  • Step 14' is IAB node 5 sending BAP layer signaling to IAB node 6 to instruct IAB node 6 to establish an F1 connection.
  • Step 15 the IAB node 6 sends an F1 connection establishment request to the target host.
  • Step 16 the target host sends an F1 connection establishment response message to the IAB node 6 , which carries the RRC signaling of the IAB node 7 .
  • Step 17 the IAB node 6 sends RRC signaling to the IAB node 7 to instruct the IAB node 7 to establish the F1 connection.
  • step 16 and step 17 may be replaced by step 16' and step 17' in FIG. 5 .
  • Step 16' is an F1 connection establishment response message without RRC signaling;
  • Step 17' is for IAB node 6 to send BAP layer signaling to IAB node 7, which is used to instruct IAB node 7 to establish an F1 connection.
  • Step 18 the IAB node 7 sends an F1 connection establishment request to the target host.
  • Step 19 the target host sends an F1 connection establishment response message to the IAB node 7 .
  • Step 20 the IAB node 7 sends the UE's RRC reconfiguration complete message to the target donor.
  • Step 21 the IAB node 6 sends the RRC reconfiguration complete message of the IAB node 7 to the target host.
  • Step 22 the IAB node 5 sends the RRC reconfiguration complete message of the IAB node 6 to the target host.
  • step 21 can be placed at any position after step 16, and step 22 can be placed at any position after step 13.
  • the IAB node can send RRC signaling to the child node according to the instruction of the target host, or send BAP layer signaling to the child node according to the F1 connection establishment response message, instructing the child node to establish
  • the F1 connection is used to realize the establishment of a new F1 connection between the IAB node and its descendant nodes and the target host.
  • the RRC signaling instructing the sub-node to establish the F1 connection is carried in the connection establishment response message, or sent by the IAB node to the sub-node through BAP layer signaling , the source host starts to send the RRC reconfiguration message from the IAB node 5 with the least number of node hops.
  • Figure 6 it is a signaling interaction diagram of the IAB node, the source host and the target host in the implementation of the above embodiment, including the following steps:
  • Step 1 the source host sends a handover request (Xn handover request) to the target host, requesting to migrate the IAB node 5, its descendant nodes and UE below it to the IAB DONOR CU2 (representing the target host).
  • Xn handover request a handover request
  • the source host is represented by IAB DONOR CU1 in Figure 6.
  • Step 2 the target host sends a handover response (Xn handover request ACK) to the source host, which carries the RRC reconfiguration message of each IAB node and the UE.
  • Xn handover request ACK a handover response
  • Step 3 the source host sends the RRC reconfiguration message of the IAB node 5 to the distributed unit of the IAB node 5 .
  • Step 4 the IAB node 5 randomly accesses the access node (the IAB node 4 under the target host).
  • Step 5 the IAB node 5 sends an RRC reconfiguration complete message to the target host through the default channel and the default route in the RRC reconfiguration message.
  • Step 6 the source host sends the RRC reconfiguration message of the IAB node 6 to the distributed unit of the IAB node 5, and the IAB node 5 sends the RRC reconfiguration message of the IAB node 6 to the IAB node 6 through the Uu interface.
  • Step 7 the IAB node 6 sends the RRC reconfiguration complete message of the IAB node 6 to the IAB node 5.
  • Step 8 the IAB node 5 sends an F1 connection establishment request (F1 setup request) to the target host.
  • Step 9 the target host sends an F1 connection establishment response message (F1 setup response) to the IAB node 5, which carries the RRC signaling of the IAB node 6.
  • Step 10 the IAB node 5 sends RRC signaling to the IAB node 6 to instruct the IAB node 6 to establish the F1 connection.
  • step 9 and step 10 may be replaced by step 9' and step 10' in FIG. 6 .
  • Step 9' is an F1 connection establishment response message without RRC signaling;
  • Step 10' is for IAB node 5 to send BAP layer signaling to IAB node 6 to instruct IAB node 6 to establish an F1 connection.
  • Step 11 the source host sends the RRC reconfiguration message of the IAB node 7 to the distributed unit of the IAB node 6 , and the IAB node 6 sends the RRC reconfiguration message of the IAB node 7 to the IAB node 7 through the Uu interface.
  • Step 12 the IAB node 7 sends the RRC reconfiguration complete message of the IAB node 7 to the IAB node 6 .
  • Step 13 the IAB node 6 sends an F1 connection establishment request to the target host.
  • Step 14 the target host sends an F1 connection establishment response message to the IAB node 6 , which carries the RRC signaling of the IAB node 7 .
  • Step 15 the IAB node 6 sends RRC signaling to the IAB node 7 to instruct the IAB node 7 to establish the F1 connection.
  • step 14 and step 15 may be replaced by step 14' and step 15' in FIG. 6 .
  • Step 14' is an F1 connection establishment response message without RRC signaling;
  • Step 15' is for IAB node 6 to send BAP layer signaling to IAB node 7 to instruct IAB node 7 to establish an F1 connection.
  • Step 16 the IAB node 7 sends an F1 connection establishment request to the target host.
  • Step 17 the target host sends an F1 connection establishment response message to the IAB node 7 .
  • Step 18 the source donor sends the RRC reconfiguration message (RRC reconfiguration) of the UE to the distributed unit of the IAB node 7, and the IAB node 7 sends the RRC reconfiguration message of the UE to the UE through the Uu interface.
  • RRC reconfiguration RRC reconfiguration
  • Step 19 the UE randomly accesses the access node (the IAB node 4 under the target host).
  • Step 20 the UE sends an RRC reconfiguration complete message (RRC reconfiguration complete) of the UE to the IAB node 7.
  • Step 21 the IAB node 7 sends the UE's RRC reconfiguration complete message to the target donor.
  • Step 22 the IAB node 6 sends the RRC reconfiguration complete message of the IAB node 7 to the target host.
  • Step 23 the IAB node 5 sends the RRC reconfiguration complete message of the IAB node 6 to the target host.
  • step 22 can be placed at any position after step 14, and step 23 can be placed at any position after step 9.
  • the IAB node can send RRC signaling to the child node according to the instruction of the target host, or send BAP layer signaling to the child node according to the F1 connection establishment response message, instructing the child node to establish
  • the F1 connection is used to realize the establishment of a new F1 connection between the IAB node and its descendant nodes and the target host.
  • the target host sends F1 interface signaling to the IAB node, which is used to instruct the child nodes of the IAB node to establish an F1 connection, and the source host has the largest number of hops from the node.
  • the user equipment UE starts to send the RRC reconfiguration message.
  • FIG 7 it is a signaling interaction diagram of the IAB node, the source host and the target host in the implementation of the above embodiment, including the following steps:
  • Step 1 the source host sends a handover request (Xn handover request) to the target host, requesting to migrate the IAB node 5, its descendant nodes and UE below it to the IAB DONOR CU2 (representing the target host).
  • Xn handover request a handover request
  • the source host is represented by IAB DONOR CU1 in Figure 7.
  • Step 2 the target host sends a handover response (Xn handover request ACK) to the source host, which carries the RRC reconfiguration message of each IAB node and the UE.
  • Xn handover request ACK a handover response
  • Step 3 the source donor sends the RRC reconfiguration message (RRC reconfiguration) of the UE to the distributed unit of the IAB node 7, and the IAB node 7 sends the RRC reconfiguration message of the UE to the UE through the Uu interface.
  • RRC reconfiguration RRC reconfiguration
  • Step 4 the UE sends an RRC reconfiguration complete message (RRC reconfiguration complete) of the UE to the IAB node 7.
  • Step 5 the source host sends the RRC reconfiguration message of the IAB node 7 to the distributed unit of the IAB node 6, and the IAB node 6 sends the RRC reconfiguration message of the IAB node 7 to the IAB node 7 through the Uu interface.
  • Step 6 the IAB node 7 sends the RRC reconfiguration complete message of the IAB node 7 to the IAB node 6.
  • Step 7 the source host sends the RRC reconfiguration message of the IAB node 6 to the distributed unit of the IAB node 5, and the IAB node 5 sends the RRC reconfiguration message of the IAB node 6 to the IAB node 6 through the Uu interface.
  • Step 8 the IAB node 6 sends the IAB node 5 RRC reconfiguration complete message to the IAB node 5 .
  • Step 9 the source host sends the RRC reconfiguration message of the IAB node 5 to the distributed unit of the IAB node 5 .
  • Step 10 the IAB node 5 randomly accesses the access node (the IAB node 4 under the target host).
  • Step 11 the IAB node 5 sends an RRC reconfiguration complete message to the target host through the default channel and the default route in the RRC reconfiguration message.
  • Step 12 the IAB node 5 sends an F1 connection establishment request (F1 setup request) to the target host.
  • Step 13 the target host sends the F1 connection establishment response message (F1 setup response) to the IAB node 5.
  • Step 14 the target host sends F1 interface signaling to the IAB node 6, instructing the IAB node 6 to establish an F1 connection.
  • Step 15 the IAB node 6 sends an F1 connection establishment request to the target host.
  • Step 16 the target host sends an F1 connection establishment response message to the IAB node 6 .
  • Step 17 the target host sends F1 interface signaling to the IAB node 7, instructing the IAB node 7 to establish an F1 connection.
  • Step 18 the IAB node 7 sends an F1 connection establishment request to the target host.
  • Step 19 the target host sends an F1 connection establishment response message to the IAB node 7 .
  • Step 20 the IAB node 7 sends the UE's RRC reconfiguration complete message to the target donor.
  • Step 21 the IAB node 6 sends the RRC reconfiguration complete message of the IAB node 7 to the target host.
  • Step 22 the IAB node 5 sends the RRC reconfiguration complete message of the IAB node 6 to the target host.
  • step 21 can be placed at any position after step 16, and step 22 can be placed at any position after step 13.
  • the target host can send F1 interface signaling to the child nodes of the IAB node, instructing the child nodes to establish the F1 connection, so as to realize the establishment of the IAB node and its descendant nodes and the target host.
  • New F1 connection After the F1 connection of the IAB node is successfully established, the target host can send F1 interface signaling to the child nodes of the IAB node, instructing the child nodes to establish the F1 connection, so as to realize the establishment of the IAB node and its descendant nodes and the target host. New F1 connection.
  • the target host sends an F1 interface signaling to the IAB node, which is used to instruct the child nodes of the IAB node to establish an F1 connection, and the source host has the least number of hops from the node.
  • the IAB node 5 starts to send the RRC reconfiguration message.
  • FIG 8 it is a signaling interaction diagram of the IAB node, the source host and the target host in the implementation of the above embodiment, including the following steps:
  • Step 1 the source host sends a handover request (Xn handover request) to the target host, requesting to migrate the IAB node 5, its descendant nodes and UE below it to the IAB DONOR CU2 (representing the target host).
  • Xn handover request a handover request
  • the source host is represented by IAB DONOR CU1 in Figure 8.
  • Step 2 the target host sends a handover response (Xn handover request ACK) to the source host, which carries the RRC reconfiguration message of each IAB node and the UE.
  • Xn handover request ACK a handover response
  • Step 3 the source host sends the RRC reconfiguration message of the IAB node 5 to the distributed unit of the IAB node 5 .
  • Step 4 the IAB node 5 randomly accesses the access node (the IAB node 4 under the target host).
  • Step 5 the IAB node 5 sends an RRC reconfiguration complete message to the target host through the default channel and the default route in the RRC reconfiguration message.
  • Step 6 the source host sends the RRC reconfiguration message of the IAB node 6 to the distributed unit of the IAB node 5, and the IAB node 5 sends the RRC reconfiguration message of the IAB node 6 to the IAB node 6 through the Uu interface.
  • Step 7 the IAB node 6 sends the RRC reconfiguration complete message of the IAB node 6 to the IAB node 5.
  • Step 8 the IAB node 5 sends an F1 connection establishment request (F1 setup request) to the target host.
  • Step 9 the target host sends the F1 connection establishment response message (F1 setup response) to the IAB node 5.
  • Step 10 the target host sends F1 interface signaling to the IAB node 6, instructing the IAB node 6 to establish an F1 connection.
  • Step 11 the source host sends the RRC reconfiguration message of the IAB node 7 to the distributed unit of the IAB node 6 , and the IAB node 6 sends the RRC reconfiguration message of the IAB node 7 to the IAB node 7 through the Uu interface.
  • Step 12 the IAB node 7 sends the RRC reconfiguration complete message of the IAB node 7 to the IAB node 6 .
  • Step 13 the IAB node 6 sends an F1 connection establishment request to the target host.
  • Step 14 the target host sends an F1 connection establishment response message to the IAB node 6 .
  • Step 15 the target host sends F1 interface signaling to the IAB node 7, instructing the IAB node 7 to establish an F1 connection.
  • Step 16 the IAB node 7 sends an F1 connection establishment request to the target host.
  • Step 17 the target host sends an F1 connection establishment response message to the IAB node 7 .
  • Step 18 the source donor sends the RRC reconfiguration message (RRC reconfiguration) of the UE to the distributed unit of the IAB node 7, and the IAB node 7 sends the RRC reconfiguration message of the UE to the UE through the Uu interface.
  • RRC reconfiguration RRC reconfiguration
  • Step 19 the UE sends an RRC reconfiguration complete message (RRC reconfiguration complete) of the UE to the IAB node 7.
  • Step 20 the IAB node 7 sends the UE's RRC reconfiguration complete message to the target donor.
  • Step 21 the IAB node 6 sends the RRC reconfiguration complete message of the IAB node 7 to the target host.
  • Step 22 the IAB node 5 sends the RRC reconfiguration complete message of the IAB node 6 to the target host.
  • the target host can send F1 interface signaling to the child nodes of the IAB node, instructing the child nodes to establish the F1 connection, so as to realize the establishment of the IAB node and its descendant nodes and the target host.
  • New F1 connection After the F1 connection of the IAB node is successfully established, the target host can send F1 interface signaling to the child nodes of the IAB node, instructing the child nodes to establish the F1 connection, so as to realize the establishment of the IAB node and its descendant nodes and the target host. New F1 connection.
  • FIG. 9 is a schematic structural diagram of an integrated IAB node for access and backhaul provided according to an embodiment of the present application.
  • the IAB node switches from the source host to the target host, and the IAB node includes a memory 900, a transceiver 910, and a processor 920:
  • the transceiver 910 is used for receiving and transmitting data under the control of the processor 920 .
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 920 and various circuits of memory represented by memory 900 are linked together.
  • the bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein.
  • the bus interface provides the interface.
  • Transceiver 910 may be a number of elements, including transmitters and receivers, providing means for communicating with various other devices over transmission media including wireless channels, wired channels, fiber optic cables, and the like Transmission medium.
  • the IAB node may also include a user interface 930.
  • the user interface 930 may also be an interface capable of externally connecting the required equipment.
  • the connected equipment includes but is not limited to a keypad, a display, a speaker, a Microphone, joystick, etc.
  • the processor 920 is responsible for managing the bus architecture and general processing, and the memory 900 may store data used by the processor 920 in performing operations.
  • the processor 920 may be a CPU (central processor), an ASIC (Application Specific Integrated Circuit, an application-specific integrated circuit), an FPGA (Field-Programmable Gate Array, a field programmable gate array) or a CPLD (Complex Programmable Logic Device) , complex programmable logic device), the processor 920 may also adopt a multi-core architecture.
  • CPU central processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field-Programmable Gate Array
  • CPLD Complex Programmable Logic Device
  • complex programmable logic device complex programmable logic device
  • the processor 920 performs the following operations by calling the computer program stored in the memory:
  • the target host is the IAB node to be switched to Host;
  • the F1 message carries RRC signaling.
  • the processor 920 is specifically configured to send the RRC signaling to the child node of the IAB node, so as to trigger the establishment or migration of the F1 connection of the child node.
  • the processor 920 is specifically configured to send a backhaul adaptation protocol BAP layer signaling to the child node of the IAB node, so as to trigger the establishment or migration of the F1 connection of the child node.
  • the processor 920 is specifically configured to receive the F1 interface signaling sent by the target host; and send the F1 interface signaling to the child node of the IAB node, for triggering the F1 interface signaling.
  • the F1 connection of the child node is established or migrated.
  • the IAB node includes a top-level migration node or a non-top-level migration node.
  • the IAB node is a top-level migration node that is switched to the target host.
  • the processor 920 is further configured to, before sending the F1 connection establishment request to the target host, receive an RRC reconfiguration message sent by the source host, wherein the RRC reconfiguration message is sent by the target host to the source host carried in the handover response of the IAB node, the RRC reconfiguration message carries the configuration parameters of the IAB node; the source host is the host before the IAB node handover; according to the configuration parameters of the IAB node, the The IAB node is reconfigured.
  • the RRC reconfiguration message also carries the global cell identity code CGI of the access node under the target host; the processor 920 is further configured to: Configuration parameters, after the IAB node is reconfigured, a random access process is performed according to the CGI of the access node under the target host.
  • the RRC reconfiguration message also carries information about a default channel and a default route between the target host and the IAB node; the processor 920 is specifically configured to: The default channel and the default route send the F1 connection establishment request to the target host.
  • the IAB node is a non-top-level migration node that is switched to the target host.
  • the processor 920 is further configured to, before sending the F1 connection establishment request to the target host, receive an RRC reconfiguration message sent by the parent node of the IAB node, wherein the RRC reconfiguration message is sent by the target host to the RRC reconfiguration message. carried in the handover response sent by the source host, and sent by the source host to the parent node; the source host is the host before the IAB node is switched; according to the RRC reconfiguration message, the IAB node is performed. Reconfiguration; receiving the indication information sent by the parent node.
  • the processor 920 is further configured to, after reconfiguring the IAB node according to the RRC reconfiguration message, send an RRC reconfiguration complete message to the parent node, using and sending the RRC reconfiguration complete message to the target host through the F1 connection between the parent node and the target host.
  • the default channel is a default backhaul radio link control BH RLC channel; the default route is a default backhaul adaptation protocol BAP identification route.
  • IAB nodes provided in the embodiments of the present application can implement all the method steps implemented by the above-mentioned method embodiments, and can achieve the same technical effect, and the method and method embodiments in this embodiment will not be discussed here. The same parts and beneficial effects will be described in detail.
  • FIG. 10 is a schematic structural diagram of a target host provided according to an embodiment of the present application.
  • the target host may include a memory 1000, a transceiver 1010, and a processor 1020, wherein:
  • the transceiver 1010 is used for receiving and transmitting data under the control of the processor 1020 .
  • the bus architecture may include any number of interconnected buses and bridges, specifically, one or more processors represented by the processor 1020 and various circuits of the memory represented by the memory 1000 are linked together.
  • the bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein.
  • the bus interface provides the interface.
  • Transceiver 1010 may be multiple elements, including a transmitter and a receiver, providing means for communicating with various other devices over transmission media including wireless channels, wired channels, fiber optic cables, and the like.
  • the processor 1020 is responsible for managing the bus architecture and general processing, and the memory 1000 may store data used by the processor 1020 in performing operations.
  • the processor 1020 may be a central processor (CPU), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or a complex programmable logic device (Comple14Programmable Logic Device, CPLD), the processor can also use a multi-core architecture.
  • CPU central processor
  • ASIC application-specific integrated circuit
  • FPGA field-programmable gate array
  • CPLD complex programmable logic device
  • the processor 1020 performs the following operations by calling the computer program stored in the memory:
  • the F1 connection establishment request is used to request the establishment of the IAB node and the target host F1 connection between;
  • the processor 1020 is specifically configured to send an F1 message to the IAB node, which is used to indicate that the IAB node F1 connection is established successfully; wherein, the F1 message carries RRC signaling , which is used to trigger F1 connection establishment or migration of the child nodes of the IAB node.
  • the processor 1020 is specifically configured to send an F1 message to the IAB node, to indicate that the IAB node F1 connection is successfully established;
  • An F1 interface signaling is sent to the IAB node, which is used to trigger the establishment or migration of the F1 connection of the child nodes of the IAB node.
  • the processor 1020 is further configured to receive a handover request sent by the source host before receiving the F1 connection establishment request for accessing the backhaul integrated IAB node, wherein the source The host is the host before the handover of the IAB node; and sends a handover response to the source host, wherein the handover response carries the RRC reconfiguration message of the IAB node, which is used to reconfigure the IAB node.
  • the IAB node includes a top-level migration node or a non-top-level migration node.
  • the IAB node is a top-level migration node that is switched to the target host.
  • the processor 1020 is further configured to receive an RRC reconfiguration complete message sent by the IAB node, where the RRC reconfiguration complete message is a message sent after the IAB node performs reconfiguration according to the RRC reconfiguration message.
  • the IAB node is a non-top-level migration node that is switched to the target host.
  • the processor 1020 is further configured to receive an RRC reconfiguration complete message sent by the parent node of the IAB node, where the RRC reconfiguration complete message is sent to the IAB node after reconfiguration according to the RRC reconfiguration message.
  • the parent node which is sent by the parent node through the F1 connection with the target host.
  • the number of the IAB nodes is multiple, and the number of the RRC reconfiguration messages is multiple; the handover response carries an RRC reconfiguration message sequence, which is used to The RRC reconfiguration message sequence sends a plurality of the RRC reconfiguration messages in sequence.
  • the processor 1020 is further configured to, before sending a handover response to the source host, determine the number of node hops between a plurality of the IAB nodes and the target host; The number of hops sorts the RRC reconfiguration messages of a plurality of the IAB nodes in ascending order to obtain the RRC reconfiguration message sequence.
  • the processor 1020 is further configured to, before sending a handover response to the source host, determine the number of node hops between a plurality of the IAB nodes and the target host; The number of hops is used to sort the RRC reconfiguration messages of multiple IAB nodes in descending order to obtain the RRC reconfiguration message sequence.
  • FIG. 11 is a schematic structural diagram of a connection establishment apparatus provided according to an embodiment of the present application. As shown in FIG. 11 , the connection establishment device is applied to access and backhaul integrated IAB node, and the connection establishment device 110 includes:
  • the sending unit 1101 is configured to send an F1 connection establishment request to a target host, wherein the F1 connection establishment request is used to request to establish an F1 connection between the IAB node and the target host;
  • the target host is the The host to which the IAB node is to be switched;
  • a receiving unit 1102 configured to receive the F1 message sent by the target host
  • the sending unit 1101 is further configured to send indication information to the child nodes of the IAB node, where the indication information is used to trigger F1 connection establishment or migration of the child nodes of the IAB node.
  • the F1 message carries RRC signaling; the sending unit 1101 is specifically configured to send the RRC signaling to the child node of the IAB node, which is used to trigger the establishment of the F1 connection of the child node or migrate.
  • the sending unit 1101 is specifically configured to send backhaul adaptation protocol BAP layer signaling to the child node of the IAB node, so as to trigger the establishment or migration of the F1 connection of the child node.
  • the sending unit 1101 is specifically configured to receive the F1 interface signaling sent by the target host; send the F1 interface signaling to the child node of the IAB node, to trigger the F1 connection of the child node Build or migrate.
  • the IAB node includes a top-level migration node or a non-top-level migration node.
  • the IAB node is a top-level migration node that is switched to the target host.
  • the receiving unit 1102 is further configured to receive an RRC reconfiguration message sent by the source host, where the RRC reconfiguration message is carried in the handover response sent by the target host to the source host, and the RRC reconfiguration message is carried in the handover response sent by the target host to the source host.
  • the configuration message carries the configuration parameters of the IAB node; the source host is the host before the IAB node is switched; and the IAB node is reconfigured according to the configuration parameters of the IAB node.
  • the RRC reconfiguration message also carries the global cell identifier CGI of the access node under the target host; the device further comprises: an access unit, according to the CGI of the access node under the target host , the random access process is performed.
  • the sending unit 1101 is specifically configured to send the F1 connection establishment request to the target host by using the default channel and the default route.
  • the IAB node is a non-top-level migration node that is switched to the target host; the receiving unit 1102 is further configured to receive an RRC reconfiguration message sent by the parent node of the IAB node, wherein the RRC reconfiguration message
  • the configuration message is carried in the handover response sent by the target host to the source host, and is sent by the source host to the parent node; the source host is the host before the IAB node is switched; according to the RRC reset
  • a configuration message is used to reconfigure the IAB node; and the indication information sent by the parent node is received.
  • the sending unit 1101 is further configured to send an RRC reconfiguration complete message to the parent node, for sending the RRC reconfiguration complete message through the F1 connection between the parent node and the target host to the target host.
  • the default channel is a default backhaul radio link control BH RLC channel; the default route is a default backhaul adaptation protocol BAP identification route.
  • the connection establishment device provided by the embodiment of the present application sends an F1 connection establishment request to the target host, wherein the F1 connection establishment request is used to request to establish an F1 connection between the IAB node and the target host; the target host is the host to be switched to by the IAB node; receives the F1 message sent by the target host; sends indication information to the child nodes of the IAB node, where the indication information is used to trigger the establishment or migration of the F1 connection of the child nodes of the IAB node.
  • the IAB node can send indication information to the child node, which is used to trigger the establishment or migration of the F1 connection of the child node, so as to realize the establishment of a new F1 connection or migration between the IAB node and its descendant nodes and the target host.
  • the method and the device are conceived based on the same application. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and repeated descriptions will not be repeated here.
  • FIG. 12 is a schematic structural diagram of a connection establishment apparatus provided according to an embodiment of the present application. As shown in Figure 12, the device is applied to the target host, and the connection establishment device 120 includes:
  • the receiving unit 1201 is configured to receive an F1 connection establishment request for accessing the integrated backhaul IAB node, wherein the target host is the host to which the IAB node is to be switched; the F1 connection establishment request is used to request the establishment of the IAB an F1 connection between the node and the target host;
  • the sending unit 1202 is configured to send an F1 connection establishment success indication and indication information to the IAB node, wherein the indication information is used to trigger F1 connection establishment or migration of the child nodes of the IAB node.
  • the sending unit 1202 is specifically configured to send an F1 message to the IAB node, which is used to indicate that the IAB node F1 connection is successfully established; wherein, the F1 message carries RRC signaling, which is used to trigger the F1 connection establishment or migration of the child nodes of the IAB node.
  • the sending unit 1202 is specifically configured to send an F1 message to the IAB node, which is used to indicate that the F1 connection of the IAB node is successfully established; and send an F1 interface signaling to the IAB node, which is used to trigger the IAB node. F1 connections of the node's children are established or migrated.
  • the receiving unit 1201 is further configured to receive a handover request sent by the source host, where the source host is the host before the IAB node is handed over; send a handover response to the source host, wherein the source host is The handover response carries the RRC reconfiguration message of the IAB node, which is used to reconfigure the IAB node.
  • the IAB node includes a top-level migration node or a non-top-level migration node.
  • the IAB node is a top-level migration node that is switched to the target host; the receiving unit 1201 is further configured to receive an RRC reconfiguration complete message sent by the IAB node, wherein the RRC reconfiguration complete message It is a message sent by the IAB node after performing reconfiguration according to the RRC reconfiguration message.
  • the IAB node is a non-top-level migration node that is switched to the target host; the receiving unit 1201 is further configured to receive an RRC reconfiguration complete message sent by the parent node of the IAB node, wherein the RRC The reconfiguration complete message is sent to the parent node after the IAB node performs reconfiguration according to the RRC reconfiguration message, and the parent node sends the message through the F1 connection with the target host.
  • the number of the IAB nodes is multiple, and the number of the RRC reconfiguration messages is multiple; the handover response carries an RRC reconfiguration message sequence, which is used for multiple pairing according to the RRC reconfiguration message sequence
  • the RRC reconfiguration messages are sent in sequence.
  • the device further includes: a first determining unit, configured to determine the number of node hops between the multiple IAB nodes and the target host; The configuration messages are sorted in ascending order to obtain the RRC reconfiguration message sequence.
  • the apparatus further includes: a second determining unit, configured to determine the number of node hops between the multiple IAB nodes and the target host; The configuration messages are sorted in descending order to obtain the RRC reconfiguration message sequence.
  • the connection establishment device receives an F1 connection establishment request for accessing and returning an integrated IAB node, wherein the target host is the host to which the IAB node is to be switched; the F1 connection establishment request is used to request the establishment of the IAB node and the F1 connection between target hosts; send an F1 connection establishment success indication and indication information to the IAB node, wherein the indication information is used to trigger the F1 connection establishment or migration of the child node of the IAB node.
  • the instruction information can be sent to the child nodes of the IAB node to trigger the establishment or migration of the F1 connection of the child node, so that the IAB node and its descendant nodes can establish a new F1 connection with the target host or migrate.
  • the method and the device are conceived based on the same application. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and repeated descriptions will not be repeated here.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a processor-readable storage medium.
  • the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions to cause a computer device (which may be a personal computer, a server, or a network side device, etc.) or a processor (processor) to execute all or part of the steps of the methods in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .
  • an embodiment of the present application further provides a processor-readable storage medium, where the processor-readable storage medium stores a computer program, and the computer program is used to make the processor execute the connection establishment method shown in the embodiment of FIG. 1 of the present application .
  • an embodiment of the present application further provides a processor-readable storage medium, where the processor-readable storage medium stores a computer program, and the computer program is used to make the processor execute the connection establishment method shown in the embodiment of FIG. 2 of the present application .
  • the above-mentioned processor-readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage ( For example, CD, DVD, BD, HVD, etc.), and semiconductor memory (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state disk (SSD)), and the like.
  • magnetic storage such as floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.
  • optical storage For example, CD, DVD, BD, HVD, etc.
  • semiconductor memory such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state disk (SSD)
  • the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied therein, including but not limited to disk storage, optical storage, and the like.
  • processor-executable instructions may also be stored in a processor-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory result in the manufacture of means comprising the instructions product, the instruction means implements the functions specified in the flow or flow of the flowchart and/or the block or blocks of the block diagram.
  • processor-executable instructions can also be loaded onto a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process that Execution of the instructions provides steps for implementing the functions specified in the flowchart or blocks and/or the block or blocks of the block diagrams.

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Abstract

本申请公开了一种连接建立方法、装置、设备及存储介质，涉及通信技术领域。具体实现方案为：向目标宿主发送F1连接建立请求，其中，所述F1连接建立请求，用于请求建立所述IAB节点与所述目标宿主之间的F1连接；所述目标宿主为所述IAB节点待切换至的宿主；接收所述目标宿主发送的F1消息；向所述IAB节点的子节点发送指示信息，所述指示信息用于触发所述IAB节点的子节点的F1连接建立或迁移。

Description

连接建立方法、装置、设备及存储介质
相关申请的交叉引用
本申请要求基于申请号为202011110955.4、申请日为2020年10月16日、发明名称为“连接建立方法、装置、设备及存储介质”的中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及通信技术领域，尤其涉及一种连接建立方法、装置、设备及存储介质。
背景技术
目前，随着接入回传一体化(Integrated Access and Backhaul，IAB)技术的发展，对IAB节点的移动性的要求也越来越高。
相关技术中，涉及对IAB节点进行宿主内迁移。宿主内迁移，指的是IAB节点及其子孙节点从宿主的一个分布式单元切换到另一个分布式单元，不涉及宿主的切换，不涉及新的F1连接的建立。
当需要对IAB节点进行宿主间迁移时，IAB节点及其子孙节点需要与目标宿主建立新的F1连接，然而，相关技术中，并未涉及IAB节点及其子孙节点如何与目标宿主建立新的F1连接。
发明内容
本申请提供了一种连接建立方法、装置、设备及存储介质。
根据本申请的一方面，提供了一种连接建立方法，所述方法应用于接入回传一体化IAB节点，所述方法包括：
向目标宿主发送F1连接建立请求，其中，所述F1连接建立请求，用于请求建立所述IAB节点与所述目标宿主之间的F1连接；所述目标宿主为所述IAB节点待切换至的宿主；
接收所述目标宿主发送的F1消息；
向所述IAB节点的子节点发送指示信息，所述指示信息用于触发所述IAB节点的子节点的F1连接建立或迁移。
可选地，所述F1消息中携带有RRC信令；
所述向所述IAB节点的子节点发送指示信息，包括：
向所述IAB节点的子节点发送所述RRC信令，用于触发所述子节点的F1连接建立或迁移。
可选地，所述向所述IAB节点的子节点发送指示信息，包括：
向所述IAB节点的子节点发送回传适应协议BAP层信令，用于触发所述子节点的F1连接建立或迁移。
可选地，所述向所述IAB节点的子节点发送指示信息，包括：
接收所述目标宿主发送的F1接口信令；
向所述IAB节点的子节点发送所述F1接口信令，用于触发所述子节点的F1连接建立或迁移。
可选地，所述IAB节点包括顶层迁移节点或非顶层迁移节点。
可选地，所述IAB节点为切换至所述目标宿主的顶层迁移节点；
所述向所述目标宿主发送F1连接建立请求之前，还包括：
接收源宿主发送的RRC重配置消息，其中，所述RRC重配置消息，是所述目标宿主向所述源宿主发送的切换响应中携带的，所述RRC重配置消息中携带有所述IAB节点的配置参数；所述源宿主为所述IAB节点切换前的宿主；
根据所述IAB节点的配置参数，对所述IAB节点进行重配置。
可选地，所述RRC重配置消息中还携带有所述目标宿主下接入节点的全球小区识别码CGI；
所述根据所述IAB节点的配置参数，对所述IAB节点进行重配置之后，还包括：
根据所述目标宿主下接入节点的CGI，进行随机接入过程。
可选地，所述RRC重配置消息中还携带有所述目标宿主与所述IAB节点之间的默认信道和默认路由的信息；
所述向所述目标宿主发送F1连接建立请求，包括：
采用所述默认信道和所述默认路由向所述目标宿主发送所述F1连接建立请求。
可选地，所述IAB节点为切换至所述目标宿主的非顶层迁移节点；
所述向所述目标宿主发送F1连接建立请求之前，还包括：
接收所述IAB节点的母节点发送的RRC重配置消息，其中，所述RRC重配置消息，是所述目标宿主向源宿主发送的切换响应中携带的，由所述源宿主发送到所述母节点；所述源宿主为所述IAB节点切换前的宿主；
根据所述RRC重配置消息，对所述IAB节点进行重配置；
接收所述母节点发送的指示信息。
可选地，所述根据所述RRC重配置消息，对所述IAB节点进行重配置之后，还包括：
向所述母节点发送RRC重配置完成消息，用于通过所述母节点与所述目标宿主之间的F1连接将所述RRC重配置完成消息发送至所述目标宿主。
可选地，所述默认信道是默认回传无线链路控制BH RLC信道；所述默认路由是默认回传适应协议BAP标识路由。
根据本申请的另一方面，提供了一种连接建立方法，所述方法应用于目标宿主，所述方法包括：
接收接入回传一体化IAB节点的F1连接建立请求，其中，所述目标宿主为IAB节点待切换至的宿主；所述F1连接建立请求，用于请求建立所述IAB节点与所述目标宿主之间的F1连接；
向所述IAB节点发送F1连接建立成功指示以及指示信息，其中，所述指示信息，用于触发所述IAB节点的子节点的F1连接建立或迁移。
可选地，所述向所述IAB节点发送F1连接建立成功指示以及指示信息，包括：
向所述IAB节点发送F1消息，用于指示所述IAB节点F1连接建立成功；
其中，所述F1消息携带有RRC信令，用于触发所述IAB节点的子节点的F1连接建立或迁移。
可选地，所述向所述IAB节点发送F1连接建立成功指示以及指示信息，包括：
向所述IAB节点发送F1消息，用于指示所述IAB节点F1连接建立成功；
向所述IAB节点发送F1接口信令，用于触发所述IAB节点的子节点的F1连接建立或迁移。
可选地，所述接收接入回传一体化IAB节点的F1连接建立请求之前，还包括：
接收所述源宿主发送的切换请求，其中，所述源宿主为所述IAB节点切换前的宿主；
向所述源宿主发送切换响应，其中，所述切换响应携带有所述IAB节点的RRC重配置消息，用于对所述IAB节点进行重配置。
可选地，所述IAB节点包括顶层迁移节点或非顶层迁移节点。
可选地，所述IAB节点为切换至所述目标宿主的顶层迁移节点；
所述的方法还包括：
接收所述IAB节点发送的RRC重配置完成消息，其中，所述RRC重配置完成消息是所述IAB节点根据所述RRC重配置消息进行重配置之后发送的消息。
可选地，所述IAB节点为切换至所述目标宿主的非顶层迁移节点；
所述的方法还包括：
接收所述IAB节点的母节点发送的RRC重配置完成消息，其中，所述RRC重配置完 成消息是所述IAB节点根据所述RRC重配置消息进行重配置之后发送到所述母节点，所述母节点通过与所述目标宿主之间的F1连接发送的。
可选地，所述IAB节点的数量为多个，所述RRC重配置消息的数量为多个；
所述切换响应中携带有RRC重配置消息序列，用于按照所述RRC重配置消息序列对多个所述RRC重配置消息依次进行发送。
可选地，所述向所述源宿主发送切换响应之前，还包括：
确定多个所述IAB节点与所述目标宿主之间的节点跳数；
按照节点跳数对多个所述IAB节点的RRC重配置消息进行升序排序，得到所述RRC重配置消息序列。
可选地，所述向所述源宿主发送切换响应之前，还包括：
确定多个所述IAB节点与所述目标宿主之间的节点跳数；
按照节点跳数对多个所述IAB节点的RRC重配置消息进行降序排序，得到所述RRC重配置消息序列。
根据本申请的另一方面，提供了一种接入回传一体化IAB节点，所述IAB节点包括存储器，收发机，处理器：
存储器，用于存储计算机程序；收发机，用于在所述处理器的控制下收发数据；处理器，用于读取所述存储器中的计算机程序并执行以下操作：
向目标宿主发送F1连接建立请求，其中，所述F1连接建立请求，用于请求建立所述IAB节点与所述目标宿主之间的F1连接；所述目标宿主为所述IAB节点待切换至的宿主；
接收所述目标宿主发送的F1消息；
向所述IAB节点的子节点发送指示信息，所述指示信息用于触发所述IAB节点的子节点的F1连接建立或迁移。
可选地，所述F1消息中携带有RRC信令；
所述向所述IAB节点的子节点发送指示信息，包括：
向所述IAB节点的子节点发送所述RRC信令，用于触发所述子节点的F1连接建立或迁移。
可选地，所述向所述IAB节点的子节点发送指示信息，包括：
向所述IAB节点的子节点发送回传适应协议BAP层信令，用于触发所述子节点的F1连接建立或迁移。
可选地，所述向所述IAB节点的子节点发送指示信息，包括：
接收所述目标宿主发送的F1接口信令；
向所述IAB节点的子节点发送所述F1接口信令，用于触发所述子节点的F1连接建立或迁移。
可选地，所述IAB节点包括顶层迁移节点或非顶层迁移节点。
可选地，所述IAB节点为切换至所述目标宿主的顶层迁移节点；
所述向所述目标宿主发送F1连接建立请求之前，还包括：
接收源宿主发送的RRC重配置消息，其中，所述RRC重配置消息，是所述目标宿主向所述源宿主发送的切换响应中携带的，所述RRC重配置消息中携带有所述IAB节点的配置参数；所述源宿主为所述IAB节点切换前的宿主；
根据所述IAB节点的配置参数，对所述IAB节点进行重配置。
可选地，所述RRC重配置消息中还携带有所述目标宿主下接入节点的全球小区识别码CGI；
所述根据所述IAB节点的配置参数，对所述IAB节点进行重配置之后，还包括：
根据所述目标宿主下接入节点的CGI，进行随机接入过程。
可选地，所述RRC重配置消息中还携带有所述目标宿主与所述IAB节点之间的默认信道和默认路由的信息；
所述向所述目标宿主发送F1连接建立请求，包括：
采用所述默认信道和所述默认路由向所述目标宿主发送所述F1连接建立请求。
可选地，所述IAB节点为切换至所述目标宿主的非顶层迁移节点；
所述向所述目标宿主发送F1连接建立请求之前，还包括：
接收所述IAB节点的母节点发送的RRC重配置消息，其中，所述RRC重配置消息，是所述目标宿主向源宿主发送的切换响应中携带的，由所述源宿主发送到所述母节点；所述源宿主为所述IAB节点切换前的宿主；
根据所述RRC重配置消息，对所述IAB节点进行重配置；
接收所述母节点发送的指示信息。
可选地，所述根据所述RRC重配置消息，对所述IAB节点进行重配置之后，还包括：
向所述母节点发送RRC重配置完成消息，用于通过所述母节点与所述目标宿主之间的F1连接将所述RRC重配置完成消息发送至所述目标宿主。
可选地，所述默认信道是默认回传无线链路控制BH RLC信道；所述默认路由是默认回传适应协议BAP标识路由。
根据本申请的另一方面，提供了一种目标宿主，包括存储器，收发机，处理器：
存储器，用于存储计算机程序；收发机，用于在所述处理器的控制下收发数据；处理器，用于读取所述存储器中的计算机程序并执行以下操作：
接收接入回传一体化IAB节点的F1连接建立请求，其中，所述目标宿主为IAB节点待切换至的宿主；所述F1连接建立请求，用于请求建立所述IAB节点与所述目标宿主之间的F1连接；
向所述IAB节点发送F1连接建立成功指示以及指示信息，其中，所述指示信息，用于触发所述IAB节点的子节点的F1连接建立或迁移。
可选地，所述向所述IAB节点发送F1连接建立成功指示以及指示信息，包括：
向所述IAB节点发送F1消息，用于指示所述IAB节点F1连接建立成功；
其中，所述F1消息携带有RRC信令，用于触发所述IAB节点的子节点的F1连接建立或迁移。
可选地，所述向所述IAB节点发送F1连接建立成功指示以及指示信息，包括：
向所述IAB节点发送F1消息，用于指示所述IAB节点F1连接建立成功；
向所述IAB节点发送F1接口信令，用于触发所述IAB节点的子节点的F1连接建立或迁移。
可选地，所述接收接入回传一体化IAB节点的F1连接建立请求之前，还包括：
接收所述源宿主发送的切换请求，其中，所述源宿主为所述IAB节点切换前的宿主；
向所述源宿主发送切换响应，其中，所述切换响应携带有所述IAB节点的RRC重配置消息，用于对所述IAB节点进行重配置。
可选地，所述IAB节点包括顶层迁移节点或非顶层迁移节点。
可选地，所述IAB节点为切换至所述目标宿主的顶层迁移节点；
所述处理器还执行以下操作：
接收所述IAB节点发送的RRC重配置完成消息，其中，所述RRC重配置完成消息是所述IAB节点根据所述RRC重配置消息进行重配置之后发送的消息。
可选地，所述IAB节点为切换至所述目标宿主的非顶层迁移节点；
所述处理器还执行以下操作：
接收所述IAB节点的母节点发送的RRC重配置完成消息，其中，所述RRC重配置完成消息是所述IAB节点根据所述RRC重配置消息进行重配置之后发送到所述母节点，所述母节点通过与所述目标宿主之间的F1连接发送的。
可选地，所述IAB节点的数量为多个，所述RRC重配置消息的数量为多个；
所述切换响应中携带有RRC重配置消息序列，用于按照所述RRC重配置消息序列对多个所述RRC重配置消息依次进行发送。
可选地，所述向所述源宿主发送切换响应之前，还包括：
确定多个所述IAB节点与所述目标宿主之间的节点跳数；
按照节点跳数对多个所述IAB节点的RRC重配置消息进行升序排序，得到所述RRC重配置消息序列。
可选地，所述向所述源宿主发送切换响应之前，还包括：
确定多个所述IAB节点与所述目标宿主之间的节点跳数；
按照节点跳数对多个所述IAB节点的RRC重配置消息进行降序排序，得到所述RRC重配置消息序列。
根据本申请的另一方面，提供了一种连接建立装置，所述装置应用于接入回传一体化IAB节点，所述装置包括：
发送单元，用于向目标宿主发送F1连接建立请求，其中，所述F1连接建立请求，用于请求建立所述IAB节点与所述目标宿主之间的F1连接；所述目标宿主为所述IAB节点待切换至的宿主；
接收单元，用于接收所述目标宿主发送的F1消息；
所述发送单元，还用于向所述IAB节点的子节点发送指示信息，所述指示信息用于触发所述IAB节点的子节点的F1连接建立或迁移。
根据本申请的另一方面，提供了一种连接建立装置，所述装置应用于目标宿主，所述装置包括：
接收单元，用于接收接入回传一体化IAB节点的F1连接建立请求，其中，所述目标宿主为IAB节点待切换至的宿主；所述F1连接建立请求，用于请求建立所述IAB节点与所述目标宿主之间的F1连接；
发送单元，用于向所述IAB节点发送F1连接建立成功指示以及指示信息，其中，所述指示信息，用于触发所述IAB节点的子节点的F1连接建立或迁移。
根据本申请的另一方面，提供了一种处理器可读存储介质，其特征在于，所述处理器可读存储介质存储有计算机程序，所述计算机程序用于使所述处理器执行用于接入回传一体化IAB节点的连接建立方法，或者，执行用于目标宿主的连接建立方法。
本申请具有以下技术效果：
通过向目标宿主发送F1连接建立请求，其中，所述F1连接建立请求，用于请求建立所述IAB节点与所述目标宿主之间的F1连接；目标宿主为所述IAB节点待切换至的宿主；接收所述目标宿主发送的F1消息；向所述IAB节点的子节点发送指示信息，所述指示信 息用于触发所述IAB节点的子节点的F1连接建立或迁移。由此，IAB节点在F1连接建立成功后，可以向子节点发送指示信息，用于触发子节点的F1连接建立或迁移，实现IAB节点及其子孙节点与目标宿主建立新的F1连接或者迁移。
应当理解，本部分所描述的内容并非旨在标识本申请的实施例的关键或重要特征，也不用于限制本申请的范围。本申请的其它特征将通过以下的说明书而变得容易理解。
附图说明
附图用于更好地理解本方案，不构成对本申请的限定。其中：
图1是根据本申请实施例提供的一种连接建立方法的流程示意图；
图2是根据本申请实施例提供的另一种连接建立方法的流程示意图；
图3是切换前IAB节点与源宿主之间的关系示意图；
图4是切换后IAB节点与目标宿主之间的关系示意图；
图5是一实施方式下IAB节点、源宿主以及目标宿主的信令交互图；
图6是另一实施方式下IAB节点、源宿主以及目标宿主的信令交互图；
图7是另一实施方式下IAB节点、源宿主以及目标宿主的信令交互图；
图8是另一实施方式下IAB节点、源宿主以及目标宿主的信令交互图；
图9是根据本申请实施例提供的一种IAB节点的结构示意图；
图10是根据本申请实施例提供的一种目标宿主的的结构示意图；
图11是根据本申请实施例提供的一种连接建立装置的结构示意图；
图12是根据本申请实施例提供的一种连接建立装置的结构示意图。
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，所描述的实施例仅仅是本申请一部分实施例，并不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做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。
本申请实施例中术语“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
相关技术中，涉及对IAB节点进行宿主内迁移。宿主内迁移，指的是IAB节点及其子孙节点从宿主的一个分布式单元切换到另一个分布式单元，不涉及宿主的切换，不涉及新的F1连接的建立。当需要对IAB节点进行宿主间迁移时，IAB节点及其子孙节点需要与目标宿主建立新的F1连接，然而，相关技术中，并未涉及IAB节点及其子孙节点如何与 目标宿主建立新的F1连接。
为了解决上述问题，本申请实施例提供一种连接建立方法、装置、设备及存储介质。通过向目标宿主发送F1连接建立请求，其中，所述F1连接建立请求，用于请求建立所述IAB节点与所述目标宿主之间的F1连接；目标宿主为所述IAB节点待切换至的宿主；接收所述目标宿主发送的F1消息；向所述IAB节点的子节点发送指示信息，所述指示信息用于触发所述IAB节点的子节点的F1连接建立或迁移。由此，IAB节点在F1连接建立成功后，可以向子节点发送指示信息，触发子节点的F1连接建立或迁移，实现IAB节点及其子孙节点与目标宿主建立新的F1连接或迁移。
下面参考附图描述本实施例的连接建立方法、装置、设备及存储介质。
其中，需要说明的是，本申请实施例提供的技术方案可以适用于多种系统，尤其是5G系统。例如适用的系统可以是全球移动通讯(global system of mobile communication，GSM)系统、码分多址(code division multiple access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)通用分组无线业务(general packet radio service，GPRS)系统、长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)系统、高级长期演进(long term evolution advanced，LTE-A)系统、通用移动系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)系统、5G新空口(New Radio,NR)系统等。这多种系统中均包括终端设备和网络侧设备。系统中还可以包括核心网部分，例如演进的分组系统(Evloved Packet System,EPS)、5G系统(5GS)等。
图1是根据本申请实施例提供的一种连接建立方法的流程示意图，该信息处理方法应用于接入回传一体化(Integrated Access and Backhaul，IAB)节点。
如图1所示，方法包括：
步骤11，向目标宿主发送F1连接建立请求，其中，F1连接建立请求，用于请求建立IAB节点与目标宿主之间的F1连接；目标宿主为IAB节点待切换至的宿主。
其中，本申请实施例中的IAB节点，包括从源宿主切换至目标宿主的顶层迁移节点或非顶层迁移节点；其中，顶层迁移节点为需要从源宿主切换到目标宿主的IAB节点中，与源宿主之间的节点跳数最少的节点，该IAB节点的母节点不需要进行宿主切换。非顶层迁移节点为顶层迁移节点的子孙节点。
在一些实施方式中，IAB节点可以为切换至目标宿主的顶层迁移节点。在该实施方式中，步骤11之前，IAB节点可以执行以下步骤：接收源宿主发送的RRC重配置消息，其中，RRC重配置消息，是目标宿主向源宿主发送的切换响应中携带的，RRC重配置消息中 携带有IAB节点的配置参数；源宿主为IAB节点切换前的宿主；根据IAB节点的配置参数，对IAB节点进行重配置。
在上述实施方式中，IAB节点为切换至目标宿主的顶层迁移节点，在进行重配置之后，IAB节点可以向目标宿主发送F1连接建立请求，以建立与目标宿主之间的F1连接。
在上述实施方式中，RRC重配置消息中还携带有目标宿主与IAB节点之间的默认信道和默认路由的信息。在第一种实施场景中，在进行重配置之后，IAB节点可以采用默认信道和默认路由向目标宿主发送RRC重配置完成消息，以及时将IAB节点的RRC重配置完成消息发送至目标宿主。其中，所述默认信道是默认回传无线链路控制(Backhaul Radio Link Control，BH RLC)信道；所述默认路由是默认回传适应协议(Backhaul Adaptation Protocol，BAP)标识路由。在第二种实施场景中，在进行重配置之后，若IAB节点与目标宿主之间的F1连接建立成功，则通过F1连接向目标宿主发送RRC重配置完成消息。
在上述实施方式中，RRC重配置消息中还携带有目标宿主下接入节点的全球小区识别码(Cell Global Identifier，CGI)。对应的，IAB节点根据IAB节点的配置参数，对IAB节点进行重配置之后，还可以执行以下步骤：根据目标宿主下接入节点的CGI，进行随机接入过程。随机接入完成后，IAB节点与目标宿主之间的默认信道连通，从而IAB节点能够采用默认信道和默认路由向目标宿主发送F1连接建立请求。
在上述实施方式中，IAB节点的配置参数中携带有目标宿主给IAB节点重新分配的目标全球小区识别码CGI，在随机接入过程中，IAB节点发送给接入节点的随机接入请求中携带有IAB节点的目标CGI，使得接入节点了解到IAB节点的目标CGI。
在另一些实施方式中，IAB节点可以为切换至目标宿主的非顶层迁移节点。在该实施方式中，步骤11之前，IAB节点可以执行以下步骤：接收IAB节点的母节点发送的RRC重配置消息，其中，RRC重配置消息，是目标宿主向源宿主发送的切换响应中携带的，由源宿主发送到所述母节点；源宿主为IAB节点切换前的宿主；根据RRC重配置消息，对IAB节点进行重配置；接收母节点发送的指示信息。
在上述实施方式中，IAB节点为切换至目标宿主的顶层迁移节点，在进行重配置之后，需要等待母节点发送的指示信息。在接收到母节点发送的指示信息后，确定母节点的F1连接建立完成，从而可以向目标宿主发送F1连接建立请求，以建立与目标宿主之间的F1连接。
在上述实施方式中，所述RRC重配置消息中还携带有目标宿主与IAB节点之间的默认信道和默认路由的信息；在进行重配置之后且接收到母节点发送的指示信息，确定IAB节点与目标宿主之间的默认信道连通，从而IAB节点能够采用默认信道和默认路由向目标宿主发送F1连接建立请求。
在上述实施方式中，在进行重配置之后，向母节点发送RRC重配置完成消息，用于通过母节点与目标宿主之间的F1连接将RRC重配置完成消息发送至目标宿主。
步骤12，接收目标宿主发送的F1消息。
步骤13，向IAB节点的子节点发送指示信息，指示信息用于触发IAB节点的子节点的F1连接建立或迁移。
在一些实施例方式中，F1消息例如可以为F1连接建立响应消息，其中携带有RRC信令。对应的，IAB节点执行步骤13的过程具体可以为，向IAB节点的子节点发送所述RRC信令，用于触发子节点的F1连接建立或迁移。
在上述实施方式中，目标宿主向IAB节点发送F1消息时，IAB节点的子节点与目标宿主之间还未建立F1连接，IAB节点的子节点可能还未进行重配置，因此，需要通过IAB节点将RRC信令发送至子节点。其中，IAB节点可以通过与子节点之间的Uu接口向子节点发送RRC信令。
在另一些实施方式中，IAB节点执行步骤13的过程具体可以为，向IAB节点的子节点发送回传适应协议BAP层信令，用于触发子节点的F1连接建立或迁移。
在另一些实施例方式中，IAB节点执行步骤13的过程具体可以为，接收目标宿主发送的F1接口信令；向IAB节点的子节点发送F1接口信令，用于触发子节点的F1连接建立或迁移。
在上述实施例方式中，IAB节点的F1连接建立成功后，目标宿主可以通过与IAB节点之间的F1连接向IAB节点发送F1接口信令，IAB节点通过与子节点之间的Uu接口向子节点发送F1接口信令，触发子节点的F1连接建立或迁移。
在上述实施例方式中，触发子节点的F1连接建立，指的是在宿主间切换(inter-CU)场景下，子节点从源宿主切换到目标宿主，需要与目标宿主建立新的F1连接，子节点在接收到指示信息后，向目标宿主发送F1连接建立请求。触发子节点的F1连接迁移，指的是在宿主内切换(intra-CU)场景下，子节点从同一个宿主的一个分布式单元切换到另一个分布式单元，子节点与宿主的F1连接不变，但需要从一个分布式单元迁移到另一个分布式单元上。
本申请实施例提供一种连接建立方法，通过向目标宿主发送F1连接建立请求，其中，所述F1连接建立请求，用于请求建立所述IAB节点与所述目标宿主之间的F1连接；目标宿主为IAB节点待切换至的宿主；接收所述目标宿主发送的F1消息；向IAB节点的子节点发送指示信息，指示信息用于触发所述IAB节点的子节点的F1连接建立或迁移。由此，IAB节点在F1连接建立成功后，可以向子节点发送指示信息，用于触发子节点的F1连接建立或迁移，实现IAB节点及其子孙节点与目标宿主建立新的F1连接或者迁移。
图2是根据本申请实施例提供的另一种连接建立方法的流程示意图。该方法应用于目标宿主中。
如图2所示，该连接建立方法可以包括：
步骤21，接收接入回传一体化IAB节点的F1连接建立请求，其中，目标宿主为IAB节点待切换至的宿主；F1连接建立请求，用于请求建立IAB节点与目标宿主之间的F1连接。
在本申请实施例中的IAB节点，包括从源宿主切换至目标宿主的顶层迁移节点或非顶层迁移节点；其中，顶层迁移节点为需要从源宿主切换到目标宿主的IAB节点中，与源宿主之间的节点跳数最少的节点，该IAB节点的母节点不需要进行宿主切换。非顶层迁移节点为顶层迁移节点的子孙节点。
在一些实施例方式中，IAB节点可以为切换至目标宿主的顶层迁移节点。在该实施方式中，目标宿主还可以执行以下步骤：接收IAB节点发送的RRC重配置完成消息，其中，RRC重配置完成消息是IAB节点根据RRC重配置消息进行重配置之后发送的消息。
在上述实施例方式中，RRC重配置消息中携带有IAB节点的配置参数，目标宿主与IAB节点之间的默认信道和默认路由的信息。其中，IAB节点的配置参数，用于对IAB节点进行重配置。在第一种实施场景中，采用目标宿主与IAB节点之间的默认信道和默认路由，目标宿主可以接收IAB节点发送的RRC重配置完成消息，以及接收IAB节点发送的F1连接建立请求，以及向IAB节点发送F1消息。在第二种实施场景中，采用目标宿主与IAB节点之间的默认信道和默认路由，目标宿主可以接收IAB节点发送的F1连接建立请求，以及向IAB节点发送F1消息，在F1连接建立成功后，通过F1连接接收IAB节点发送的RRC重配置完成消息。
在另一些实施方式中，IAB节点可以为切换至目标宿主的非顶层迁移节点。在该实施方式中，目标宿主还可以执行以下步骤：接收IAB节点的母节点发送的RRC重配置完成消息，其中，RRC重配置完成消息是IAB节点根据RRC重配置消息进行重配置之后发送到母节点，母节点通过与目标宿主之间的F1连接发送的。
在上述实施例方式中，RRC重配置消息中携带有IAB节点的配置参数，目标宿主与IAB节点之间的默认信道和默认路由的信息。其中，IAB节点的配置参数，用于对IAB节点进行重配置；采用目标宿主与IAB节点之间的默认信道和默认路由，目标宿主可以接收IAB节点发送的F1连接建立请求，以及向IAB节点发送F1消息。
步骤22，向IAB节点发送F1连接建立成功指示以及指示信息，其中，指示信息，用于触发IAB节点的子节点的F1连接建立或迁移。
在一些实施方式中，目标宿主执行步骤22的过程具体可以为，向IAB节点发送F1消息，用于指示IAB节点F1连接建立成功；其中，F1消息携带有RRC信令，用于触发IAB节点的子节点的F1连接建立或迁移。
在上述实施方式中，目标宿主向IAB节点发送F1消息时，IAB节点的子节点与目标宿主之间还未建立F1连接，IAB节点的子节点可能还未进行重配置，因此，需要通过IAB节点将RRC信令发送至子节点。其中，IAB节点可以通过与子节点之间的Uu接口向子节点发送RRC信令。
在另一些实施方式中，目标宿主执行步骤22的过程具体可以为，向IAB节点发送F1消息，用于指示IAB节点F1连接建立成功；向IAB节点发送F1接口信令，用于触发IAB节点的子节点的F1连接建立或迁移。
在上述实施例方式中，IAB节点的F1连接建立成功后，目标宿主可以通过与IAB节点之间的F1连接向IAB节点发送F1接口信令，IAB节点通过与子节点之间的Uu接口向子节点发送F1接口信令，触发子节点的F1连接建立或迁移。
在上述实施方式中，在宿主间切换(inter-CU)场景下，触发子节点的F1连接建立，指的是子节点从源宿主切换到目标宿主，需要与目标宿主建立新的F1连接，子节点在接收到指示信息后，向目标宿主发送F1连接建立请求。在宿主间切换场景下，触发子节点的F1连接迁移，指的是将子节点与源宿主之间的F1连接请求迁移到子节点与目标宿主之间。在宿主内切换(intra-CU)场景下，触发子节点的F1连接迁移，指的是子节点从同一个宿主的一个分布式单元切换到另一个分布式单元，子节点与宿主的F1连接不变，但需要从一个分布式单元迁移到另一个分布式单元上。
在一些实施方式中，步骤21之前，目标宿主还可以执行以下步骤：接收源宿主发送的切换请求，其中，源宿主为IAB节点切换前的宿主；向源宿主发送切换响应，其中，切换响应携带有IAB节点的RRC重配置消息，用于对IAB节点进行重配置。
在上述实施方式中，切换请求中携带有以下信息中的任意一种或者多种：(1)顶层迁移节点及其子孙节点的上下文信息；(2)顶层迁移节点下面的用户设备(User Equipment，UE)的上下文信息，以及子孙节点下面的用户设备UE的上下文信息；(3)顶层迁移节点及其子孙节点之间的拓扑信息。切换响应中携带有：顶层迁移节点的RRC重配置消息、顶层迁移节点的子孙节点的RRC重配置消息、顶层迁移节点以及子孙节点下的用户设备UE的RRC重配置消息。
其中，本申请实施例中的UE，可以是指向用户提供语音和/或数据连通性的终端设备，具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备等。在不同的系统中，终端设备的名称可能也不相同，例如在5G系统中，终端设备可以称为用户设备 (User Equipment，UE)。无线终端设备可以经无线接入网(Radio Access Network,RAN)与一个或多个核心网(Core Network,CN)进行通信，无线终端设备可以是移动终端设备，如移动电话(或称为“蜂窝”电话)和具有移动终端设备的计算机，例如，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，它们与无线接入网交换语言和/或数据。例如，个人通信业务(Personal Communication Service，PCS)电话、无绳电话、会话发起协议(Session Initiated Protocol，SIP)话机、无线本地环路(Wireless Local Loop，WLL)站、个人数字助理(Personal Digital Assistant，PDA)等设备。无线终端设备也可以称为系统、订户单元(subscriber unit)、订户站(subscriber station)，移动站(mobile station)、移动台(mobile)、远程站(remote station)、接入点(access point)、远程终端设备(remote terminal)、接入终端设备(access terminal)、用户终端设备(user terminal)、用户代理(user agent)、用户装置(user device)，本申请实施例中并不限定。
在上述实施方式中，IAB节点的数量为多个，RRC重配置消息的数量为多个；切换响应中携带有RRC重配置消息序列，用于按照RRC重配置消息序列对多个RRC重配置消息依次进行发送。
在上述实施方式中，在第一种实施场景中，向源宿主发送切换响应之前，目标宿主还可以执行以下步骤：确定多个IAB节点与所述目标宿主之间的节点跳数；按照节点跳数对多个IAB节点的RRC重配置消息进行升序排序，得到RRC重配置消息序列。在第二种实施场景中，向源宿主发送切换响应之前，目标宿主还可以执行以下步骤：确定多个IAB节点与目标宿主之间的节点跳数；按照节点跳数对多个IAB节点的RRC重配置消息进行降序排序，得到RRC重配置消息序列。
在上述实施方式中，升序排序是指，节点跳数较少的IAB节点排序在前，节点跳数较多的IAB节点排序在后，能够先向节点跳数较少的IAB节点发送RRC重配置消息，后向节点跳数较多的IAB节点发送RRC重配置消息，其中，顶层迁移节点与目标宿主之间的节点跳数最少，从而能够及时对节点跳数较少的IAB节点进行重配置以及F1连接建立。其中，节点跳数是指，从IAB节点到目标宿主之间需要跳转的节点数量。例如，若目标宿主下的IAB节点依次为，IAB节点2、IAB节点4、IAB节点5、IAB节点6、IAB节点7，则IAB节点4与目标宿主之间的节点跳数为2，IAB节点2与目标宿主之间的节点跳数为1，IAB节点5与目标宿主之间的节点跳数为3。
在上述实施方式中，降序排序是指，节点跳数较多的IAB节点排序在前，节点跳数较少的IAB节点排序在后，能够先向节点跳数较多的IAB节点发送RRC重配置消息，后向节点跳数较少的IAB节点发送RRC重配置消息，其中，顶层迁移节点与目标宿主之间的节点跳数最少，从而能够在顶层迁移节点的F1连接建立成功后，及时对子孙节点进行F1 连接建立，缩短各个IAB节点的F1连接建立所消耗的总体时间。
本申请实施例的连接建立方法，通过接收接入回传一体化IAB节点的F1连接建立请求，其中，目标宿主为IAB节点待切换至的宿主；F1连接建立请求，用于请求建立IAB节点与目标宿主之间的F1连接；向IAB节点发送F1连接建立成功指示以及指示信息，其中，指示信息，用于触发IAB节点的子节点的F1连接建立或迁移。由此，在IAB节点的F1连接建立成功后，可以向IAB节点的子节点发送指示信息，触发子节点的F1连接建立或迁移，实现IAB节点及其子孙节点与目标宿主建立新的F1连接或迁移。
本申请实施例中，以图3所示的切换前IAB节点与源宿主之间的关系示意图和图4所示的切换后IAB节点与目标宿主之间的关系示意图来描述连接建立过程中节点、源宿主以及目标宿主之间的关系。其中，宿主包括IAB宿主集中式单元(IAB donor CU，IAB donor Centralized Unit)和IAB宿主分布式单元(IAB donor DU，IAB donor Distributed Unit)。一个IAB donor CU下面可以连接多个IAB donor DU。
IAB节点包括IAB节点分布式单元(IAB node Distributed Unit，IAB node DU)和IAB节点移动终端(IAB node Mobile Termination，IAB node MT)。其中，IAB node DU通过F1接口连接到IAB donor CU，IAB node MT通过Uu口连接到下一层的IAB node DU。如果某个IAB node下连接的是用户设备UE，则该IAB node DU连接到UE。
在图3中，左侧的CU表示源宿主集中式单元，左侧的第一个DU表示源宿主分布式单元。左侧的第一组MT和DU分别是源宿主下IAB节点1的移动终端和分布式单元；左侧的第二组MT和DU分别是源宿主下IAB节点3的移动终端和分布式单元；第三组MT和DU是切换前源宿主下IAB节点5的移动终端和分布式单元；第四组MT和DU是切换前源宿主下IAB节点6的移动终端和分布式单元；第五组MT和DU是切换前源宿主下IAB节点7的移动终端和分布式单元；UE表示切换前节点7下的用户终端。
右侧的CU表示目标宿主集中式单元。右侧的第一个DU表示目标宿主分布式单元。右侧的第一组MT和DU分别是目标宿主下IAB节点2的移动终端和分布式单元；右侧的第二组MT和DU分别是目标宿主下IAB节点4的移动终端和分布式单元。
其中，IAB节点5为从源宿主切换到目标宿主的顶层迁移节点。IAB节点6和IAB节点7为IAB节点5的子孙节点。在图3和图4所示图中，IAB节点5、IAB节点6、IAB节点7和UE是待迁移到目标宿主的IAB节点以及设备。
其中，本申请实施例涉及的IAB节点，为网络侧设备，可以是基站，该基站可以包括多个为终端提供服务的小区。根据具体应用场合不同，基站又可以称为接入点，或者可以是接入网中在空中接口上通过一个或多个扇区与无线终端设备通信的设备，或者其它名称。 网络侧设备可用于将收到的空中帧与网际协议(Internet Protocol，IP)分组进行相互更换，作为无线终端设备与接入网的其余部分之间的路由器，其中接入网的其余部分可包括网际协议(IP)通信网络。网络侧设备还可协调对空中接口的属性管理。例如，本申请实施例涉及的网络侧设备可以是全球移动通信系统(Global System for Mobile communications，GSM)或码分多址接入(Code Division Multiple Access，CDMA)中的网络侧设备(Base Transceiver Station，BTS)，也可以是带宽码分多址接入(Wide-band Code Division Multiple Access，WCDMA)中的网络侧设备(NodeB)，还可以是长期演进(long term evolution，LTE)系统中的演进型网络侧设备(evolutional Node B，eNB或e-NodeB)、5G网络架构(next generation system)中的5G基站(gNB)，也可以是家庭演进基站(Home evolved Node B，HeNB)、中继节点(relay node)、家庭基站(femto)、微微基站(pico)等，本申请实施例中并不限定。在一些网络结构中，网络侧设备可以包括集中单元(centralized unit，CU)节点和分布单元(distributed unit，DU)节点，集中单元和分布单元也可以地理上分开布置。
在一些实施方式中，以F1消息为F1连接建立响应消息为例，触发子节点的F1连接建立或迁移的RRC信令携带在F1连接建立响应消息中，或者由IAB节点通过BAP层信令发送至子节点，源宿主从节点跳数最多的用户设备UE开始发送RRC重配置消息。如图5所示，为上述实施例的实施方式中IAB节点、源宿主以及目标宿主的信令交互图，包括以下步骤：
步骤1，源宿主向目标宿主发送切换请求(Xn handover request)，请求将IAB节点5，及其下面的子孙节点和UE迁移到IAB DONOR CU2(表示目标宿主)下。
其中，源宿主在图5中用IAB DONOR CU1来表示。
步骤2，目标宿主向源宿主发送切换响应(Xn handover request ACK)，其中携带各个IAB节点以及UE的RRC重配置消息。
步骤3，源宿主向IAB节点7的分布式单元发送UE的RRC重配置消息(RRC reconfiguration)，IAB节点7通过Uu接口将UE的RRC重配置消息发送给UE。
步骤4，UE向IAB节点7发送UE的RRC重配置完成消息(RRC reconfiguration complete)。
步骤5，源宿主向IAB节点6的分布式单元发送IAB节点7的RRC重配置消息，IAB节点6通过Uu接口将IAB节点7的RRC重配置消息发送给IAB节点7。
步骤6，IAB节点7向IAB节点6发送IAB节点7的RRC重配置完成消息。
步骤7，源宿主向IAB节点5的分布式单元发送IAB节点6的RRC重配置消息，IAB节点5通过Uu接口将IAB节点6的RRC重配置消息发送给IAB节点6。
步骤8，IAB节点6向IAB节点5发送IAB节点6的RRC重配置完成消息。
步骤9，源宿主向IAB节点5的分布式单元发送IAB节点5的RRC重配置消息。
步骤10，IAB节点5随机接入到接入节点(目标宿主下的IAB节点4)。
步骤11，IAB节点5通过RRC重配置消息中的默认信道和所述默认路由向目标宿主发送RRC重配置完成消息。
步骤12，IAB节点5向目标宿主发送F1连接建立请求(F1 setup request)。
步骤13，目标宿主向IAB节点5发送F1连接建立响应消息(F1 setup response)，其中携带IAB节点6的RRC信令。
步骤14，IAB节点5向IAB节点6发送RRC信令，以指示IAB节点6进行F1连接建立。
本申请实施例中，步骤13和步骤14可以采用图5中的步骤13’和步骤14’来代替。步骤13’为不携带RRC信令的F1连接建立响应消息；步骤14’为IAB节点5向IAB节点6发送BAP层信令，用于指示IAB节点6进行F1连接建立。
步骤15，IAB节点6向目标宿主发送F1连接建立请求。
步骤16，目标宿主向IAB节点6发送F1连接建立响应消息，其中携带IAB节点7的RRC信令。
步骤17，IAB节点6向IAB节点7发送RRC信令，以指示IAB节点7进行F1连接建立。
本申请实施例中，步骤16和步骤17可以采用图5中的步骤16’和步骤17’来代替。步骤16’为不携带RRC信令的F1连接建立响应消息；步骤17’为IAB节点6向IAB节点7发送BAP层信令，用于指示IAB节点7进行F1连接建立。
步骤18，IAB节点7向目标宿主发送F1连接建立请求。
步骤19，目标宿主向IAB节点7发送F1连接建立响应消息。
步骤20，IAB节点7向目标宿主发送UE的RRC重配置完成消息。
步骤21，IAB节点6向目标宿主发送IAB节点7的RRC重配置完成消息。
步骤22，IAB节点5向目标宿主发送IAB节点6的RRC重配置完成消息。
其中，步骤21可以放置在步骤16之后的任意位置，步骤22可以放置在步骤13之后的任意位置。
在本申请实施例中，IAB节点在F1连接建立成功后，可以根据目标宿主的指示向子节点发送RRC信令，或者根据F1连接建立响应消息向子节点发送BAP层信令，指示子节点建立F1连接，实现IAB节点及其子孙节点与目标宿主建立新的F1连接。
在一些实施方式中，以F1消息为F1连接建立响应消息为例，指示子节点进行F1连接 建立的RRC信令携带在连接建立响应消息中，或者由IAB节点通过BAP层信令发送至子节点，源宿主从节点跳数最少的IAB节点5开始发送RRC重配置消息。如图6所示，为上述实施例的实施方式中IAB节点、源宿主以及目标宿主的信令交互图，包括以下步骤：
步骤1，源宿主向目标宿主发送切换请求(Xn handover request)，请求将IAB节点5，及其下面的子孙节点和UE迁移到IAB DONOR CU2(表示目标宿主)下。
其中，源宿主在图6中用IAB DONOR CU1来表示。
步骤2，目标宿主向源宿主发送切换响应(Xn handover request ACK)，其中携带各个IAB节点以及UE的RRC重配置消息。
步骤3，源宿主向IAB节点5的分布式单元发送IAB节点5的RRC重配置消息。
步骤4，IAB节点5随机接入到接入节点(目标宿主下的IAB节点4)。
步骤5，IAB节点5通过RRC重配置消息中的默认信道和所述默认路由向目标宿主发送RRC重配置完成消息。
步骤6，源宿主向IAB节点5的分布式单元发送IAB节点6的RRC重配置消息，IAB节点5通过Uu接口将IAB节点6的RRC重配置消息发送给IAB节点6。
步骤7，IAB节点6向IAB节点5发送IAB节点6的RRC重配置完成消息。
步骤8，IAB节点5向目标宿主发送F1连接建立请求(F1 setup request)。
步骤9，目标宿主向IAB节点5发送F1连接建立响应消息(F1 setup response)，其中携带IAB节点6的RRC信令。
步骤10，IAB节点5向IAB节点6发送RRC信令，以指示IAB节点6进行F1连接建立。
本申请实施例中，步骤9和步骤10可以采用图6中的步骤9’和步骤10’来代替。步骤9’为不携带RRC信令的F1连接建立响应消息；步骤10’为IAB节点5向IAB节点6发送BAP层信令，用于指示IAB节点6进行F1连接建立。
步骤11，源宿主向IAB节点6的分布式单元发送IAB节点7的RRC重配置消息，IAB节点6通过Uu接口将IAB节点7的RRC重配置消息发送给IAB节点7。
步骤12，IAB节点7向IAB节点6发送IAB节点7的RRC重配置完成消息。
步骤13，IAB节点6向目标宿主发送F1连接建立请求。
步骤14，目标宿主向IAB节点6发送F1连接建立响应消息，其中携带IAB节点7的RRC信令。
步骤15，IAB节点6向IAB节点7发送RRC信令，以指示IAB节点7进行F1连接建立。
本申请实施例中，步骤14和步骤15可以采用图6中的步骤14’和步骤15’来代替。 步骤14’为不携带RRC信令的F1连接建立响应消息；步骤15’为IAB节点6向IAB节点7发送BAP层信令，用于指示IAB节点7进行F1连接建立。
步骤16，IAB节点7向目标宿主发送F1连接建立请求。
步骤17，目标宿主向IAB节点7发送F1连接建立响应消息。
步骤18，源宿主向IAB节点7的分布式单元发送UE的RRC重配置消息(RRC reconfiguration)，IAB节点7通过Uu接口将UE的RRC重配置消息发送给UE。
步骤19，UE随机接入到接入节点(目标宿主下的IAB节点4)。
步骤20，UE向IAB节点7发送UE的RRC重配置完成消息(RRC reconfiguration complete)。
步骤21，IAB节点7向目标宿主发送UE的RRC重配置完成消息。
步骤22，IAB节点6向目标宿主发送IAB节点7的RRC重配置完成消息。
步骤23，IAB节点5向目标宿主发送IAB节点6的RRC重配置完成消息。
其中，步骤22可以放置在步骤14之后的任意位置，步骤23可以放置在步骤9之后的任意位置。
在本申请实施例中，IAB节点在F1连接建立成功后，可以根据目标宿主的指示向子节点发送RRC信令，或者根据F1连接建立响应消息向子节点发送BAP层信令，指示子节点建立F1连接，实现IAB节点及其子孙节点与目标宿主建立新的F1连接。
在一些实施方式中，以F1消息为F1连接建立响应消息为例，由目标宿主向IAB节点发送F1接口信令，用于指示IAB节点的子节点进行F1连接建立，源宿主从节点跳数最多的用户设备UE开始发送RRC重配置消息。如图7所示，为上述实施例的实施方式中IAB节点、源宿主以及目标宿主的信令交互图，包括以下步骤：
步骤1，源宿主向目标宿主发送切换请求(Xn handover request)，请求将IAB节点5，及其下面的子孙节点和UE迁移到IAB DONOR CU2(表示目标宿主)下。
其中，源宿主在图7中用IAB DONOR CU1来表示。
步骤2，目标宿主向源宿主发送切换响应(Xn handover request ACK)，其中携带各个IAB节点以及UE的RRC重配置消息。
步骤3，源宿主向IAB节点7的分布式单元发送UE的RRC重配置消息(RRC reconfiguration)，IAB节点7通过Uu接口将UE的RRC重配置消息发送给UE。
步骤4，UE向IAB节点7发送UE的RRC重配置完成消息(RRC reconfiguration complete)。
步骤5，源宿主向IAB节点6的分布式单元发送IAB节点7的RRC重配置消息，IAB 节点6通过Uu接口将IAB节点7的RRC重配置消息发送给IAB节点7。
步骤6，IAB节点7向IAB节点6发送IAB节点7的RRC重配置完成消息。
步骤7，源宿主向IAB节点5的分布式单元发送IAB节点6的RRC重配置消息，IAB节点5通过Uu接口将IAB节点6的RRC重配置消息发送给IAB节点6。
步骤8，IAB节点6向IAB节点5发送IAB节点6的RRC重配置完成消息。
步骤9，源宿主向IAB节点5的分布式单元发送IAB节点5的RRC重配置消息。
步骤10，IAB节点5随机接入到接入节点(目标宿主下的IAB节点4)。
步骤11，IAB节点5通过RRC重配置消息中的默认信道和所述默认路由向目标宿主发送RRC重配置完成消息。
步骤12，IAB节点5向目标宿主发送F1连接建立请求(F1 setup request)。
步骤13，目标宿主向IAB节点5发送F1连接建立响应消息(F1 setup response)。
步骤14，目标宿主向IAB节点6发送F1接口信令，指示IAB节点6进行F1连接建立。
步骤15，IAB节点6向目标宿主发送F1连接建立请求。
步骤16，目标宿主向IAB节点6发送F1连接建立响应消息。
步骤17，目标宿主向IAB节点7发送F1接口信令，指示IAB节点7进行F1连接建立。
步骤18，IAB节点7向目标宿主发送F1连接建立请求。
步骤19，目标宿主向IAB节点7发送F1连接建立响应消息。
步骤20，IAB节点7向目标宿主发送UE的RRC重配置完成消息。
步骤21，IAB节点6向目标宿主发送IAB节点7的RRC重配置完成消息。
步骤22，IAB节点5向目标宿主发送IAB节点6的RRC重配置完成消息。
其中，步骤21可以放置在步骤16之后的任意位置，步骤22可以放置在步骤13之后的任意位置。
在本申请实施例中，目标宿主在IAB节点的F1连接建立成功后，可以向IAB节点的子节点发送F1接口信令，指示子节点建立F1连接，实现IAB节点及其子孙节点与目标宿主建立新的F1连接。
在一些实施方式中，以F1消息为F1连接建立响应消息为例，由目标宿主向IAB节点发送F1接口信令，用于指示IAB节点的子节点进行F1连接建立，源宿主从节点跳数最少的IAB节点5开始发送RRC重配置消息。如图8所示，为上述实施例的实施方式中IAB节点、源宿主以及目标宿主的信令交互图，包括以下步骤：
步骤1，源宿主向目标宿主发送切换请求(Xn handover request)，请求将IAB节点5，及其下面的子孙节点和UE迁移到IAB DONOR CU2(表示目标宿主)下。
其中，源宿主在图8中用IAB DONOR CU1来表示。
步骤2，目标宿主向源宿主发送切换响应(Xn handover request ACK)，其中携带各个IAB节点以及UE的RRC重配置消息。
步骤3，源宿主向IAB节点5的分布式单元发送IAB节点5的RRC重配置消息。
步骤4，IAB节点5随机接入到接入节点(目标宿主下的IAB节点4)。
步骤5，IAB节点5通过RRC重配置消息中的默认信道和所述默认路由向目标宿主发送RRC重配置完成消息。
步骤6，源宿主向IAB节点5的分布式单元发送IAB节点6的RRC重配置消息，IAB节点5通过Uu接口将IAB节点6的RRC重配置消息发送给IAB节点6。
步骤7，IAB节点6向IAB节点5发送IAB节点6的RRC重配置完成消息。
步骤8，IAB节点5向目标宿主发送F1连接建立请求(F1 setup request)。
步骤9，目标宿主向IAB节点5发送F1连接建立响应消息(F1 setup response)。
步骤10，目标宿主向IAB节点6发送F1接口信令，指示IAB节点6进行F1连接建立。
步骤11，源宿主向IAB节点6的分布式单元发送IAB节点7的RRC重配置消息，IAB节点6通过Uu接口将IAB节点7的RRC重配置消息发送给IAB节点7。
步骤12，IAB节点7向IAB节点6发送IAB节点7的RRC重配置完成消息。
步骤13，IAB节点6向目标宿主发送F1连接建立请求。
步骤14，目标宿主向IAB节点6发送F1连接建立响应消息。
步骤15，目标宿主向IAB节点7发送F1接口信令，指示IAB节点7进行F1连接建立。
步骤16，IAB节点7向目标宿主发送F1连接建立请求。
步骤17，目标宿主向IAB节点7发送F1连接建立响应消息。
步骤18，源宿主向IAB节点7的分布式单元发送UE的RRC重配置消息(RRC reconfiguration)，IAB节点7通过Uu接口将UE的RRC重配置消息发送给UE。
步骤19，UE向IAB节点7发送UE的RRC重配置完成消息(RRC reconfiguration complete)。
步骤20，IAB节点7向目标宿主发送UE的RRC重配置完成消息。
步骤21，IAB节点6向目标宿主发送IAB节点7的RRC重配置完成消息。
步骤22，IAB节点5向目标宿主发送IAB节点6的RRC重配置完成消息。
在本申请实施例中，目标宿主在IAB节点的F1连接建立成功后，可以向IAB节点的子节点发送F1接口信令，指示子节点建立F1连接，实现IAB节点及其子孙节点与目标宿主建立新的F1连接。
图9是根据本申请实施例提供的一种接入回传一体化IAB节点的结构示意图。
如图9所示，该IAB节点从源宿主切换至目标宿主，该IAB节点包括存储器900，收发机910，处理器920：
收发机910，用于在处理器920的控制下接收和发送数据。
其中，在图9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920代表的一个或多个处理器和存储器900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外围设备、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910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，这些传输介质包括，这些传输介质包括无线信道、有线信道、光缆等传输介质。
如图9所示，IAB节点还可以包括用户接口930，针对不同的用户设备，用户接口930还可以是能够外接内接需要设备的接口，连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器920负责管理总线架构和通常的处理，存储器900可以存储处理器920在执行操作时所使用的数据。
可选的，处理器920可以是CPU(中央处埋器)、ASIC(Application Specific Integrated Circuit，专用集成电路)、FPGA(Field－Programmable Gate Array，现场可编程门阵列)或CPLD(Complex Programmable Logic Device，复杂可编程逻辑器件)，处理器920也可以采用多核架构。
处理器920通过调用存储器存储的计算机程序，并执行以下操作：
向目标宿主发送F1连接建立请求，其中，所述F1连接建立请求，用于请求建立所述IAB节点与所述目标宿主之间的F1连接；所述目标宿主为所述IAB节点待切换至的宿主；
接收所述目标宿主发送的F1消息；
向所述IAB节点的子节点发送指示信息，所述指示信息用于触发所述IAB节点的子节点的F1连接建立或迁移。
可选地，作为另一种实施例，所述F1消息中携带有RRC信令。处理器920具体用于，向所述IAB节点的子节点发送所述RRC信令，用于触发所述子节点的F1连接建立或迁移。
可选地，作为另一种实施例，处理器920具体用于，向所述IAB节点的子节点发送回 传适应协议BAP层信令，用于触发所述子节点的F1连接建立或迁移。
可选地，作为另一种实施例，处理器920具体用于，接收所述目标宿主发送的F1接口信令；向所述IAB节点的子节点发送所述F1接口信令，用于触发所述子节点的F1连接建立或迁移。
可选地，作为另一种实施例，所述IAB节点包括顶层迁移节点或非顶层迁移节点。
可选地，作为另一种实施例，所述IAB节点为切换至所述目标宿主的顶层迁移节点。处理器920还用于，在向所述目标宿主发送F1连接建立请求之前，接收源宿主发送的RRC重配置消息，其中，所述RRC重配置消息，是所述目标宿主向所述源宿主发送的切换响应中携带的，所述RRC重配置消息中携带有所述IAB节点的配置参数；所述源宿主为所述IAB节点切换前的宿主；根据所述IAB节点的配置参数，对所述IAB节点进行重配置。
可选地，作为另一种实施例，所述RRC重配置消息中还携带有所述目标宿主下接入节点的全球小区识别码CGI；处理器920还用于，在根据所述IAB节点的配置参数，对所述IAB节点进行重配置之后，根据所述目标宿主下接入节点的CGI，进行随机接入过程。
可选地，作为另一种实施例，所述RRC重配置消息中还携带有所述目标宿主与所述IAB节点之间的默认信道和默认路由的信息；处理器920具体用于，采用所述默认信道和所述默认路由向所述目标宿主发送所述F1连接建立请求。
可选地，作为另一种实施例，所述IAB节点为切换至所述目标宿主的非顶层迁移节点。处理器920还用于，在向所述目标宿主发送F1连接建立请求之前，接收所述IAB节点的母节点发送的RRC重配置消息，其中，所述RRC重配置消息，是所述目标宿主向源宿主发送的切换响应中携带的，由所述源宿主发送到所述母节点；所述源宿主为所述IAB节点切换前的宿主；根据所述RRC重配置消息，对所述IAB节点进行重配置；接收所述母节点发送的指示信息。
可选地，作为另一种实施例，处理器920还用于，在根据所述RRC重配置消息，对所述IAB节点进行重配置之后，向所述母节点发送RRC重配置完成消息，用于通过所述母节点与所述目标宿主之间的F1连接将所述RRC重配置完成消息发送至所述目标宿主。
可选地，作为另一种实施例，所述默认信道是默认回传无线链路控制BH RLC信道；所述默认路由是默认回传适应协议BAP标识路由。
在此需要说明的是，本申请实施例提供的上述IAB节点，能够实现上述方法实施例所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
图10是根据本申请实施例提供的一种目标宿主的的结构示意图。如图10所示，该目 标宿主可以包括存储器1000，收发机1010，处理器1020，其中：
收发机1010，用于在处理器1020的控制下接收和发送数据。
其中，在图10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1020代表的一个或多个处理器和存储器1000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外围设备、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1010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，这些传输介质包括无线信道、有线信道、光缆等传输介质。处理器1020负责管理总线架构和通常的处理，存储器1000可以存储处理器1020在执行操作时所使用的数据。
处理器1020可以是中央处埋器(CPU)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现场可编程门阵列(Field－Programmable Gate Array，FPGA)或复杂可编程逻辑器件(Comple14Programmable Logic Device，CPLD)，处理器也可以采用多核架构。
处理器1020通过调用存储器存储的计算机程序，并执行以下操作：
接收接入回传一体化IAB节点的F1连接建立请求，其中，所述目标宿主为IAB节点待切换至的宿主；所述F1连接建立请求，用于请求建立所述IAB节点与所述目标宿主之间的F1连接；
向所述IAB节点发送F1连接建立成功指示以及指示信息，其中，所述指示信息，用于触发所述IAB节点的子节点的F1连接建立或迁移。
可选地，作为另一种实施例，处理器1020具体用于，向所述IAB节点发送F1消息，用于指示所述IAB节点F1连接建立成功；其中，所述F1消息携带有RRC信令，用于触发所述IAB节点的子节点的F1连接建立或迁移。
可选地，作为另一种实施例，处理器1020具体用于，向所述IAB节点发送F1消息，用于指示所述IAB节点F1连接建立成功；
向所述IAB节点发送F1接口信令，用于触发所述IAB节点的子节点的F1连接建立或迁移。
可选地，作为另一种实施例，处理器1020还用于，在接收接入回传一体化IAB节点的F1连接建立请求之前，接收所述源宿主发送的切换请求，其中，所述源宿主为所述IAB节点切换前的宿主；向所述源宿主发送切换响应，其中，所述切换响应携带有所述IAB节点的RRC重配置消息，用于对所述IAB节点进行重配置。
可选地，作为另一种实施例，所述IAB节点包括顶层迁移节点或非顶层迁移节点。
可选地，作为另一种实施例，所述IAB节点为切换至所述目标宿主的顶层迁移节点。 处理器1020还用于，接收所述IAB节点发送的RRC重配置完成消息，其中，所述RRC重配置完成消息是所述IAB节点根据所述RRC重配置消息进行重配置之后发送的消息。
可选地，作为另一种实施例，所述IAB节点为切换至所述目标宿主的非顶层迁移节点。处理器1020还用于，接收所述IAB节点的母节点发送的RRC重配置完成消息，其中，所述RRC重配置完成消息是所述IAB节点根据所述RRC重配置消息进行重配置之后发送到所述母节点，所述母节点通过与所述目标宿主之间的F1连接发送的。
可选地，作为另一种实施例，所述IAB节点的数量为多个，所述RRC重配置消息的数量为多个；所述切换响应中携带有RRC重配置消息序列，用于按照所述RRC重配置消息序列对多个所述RRC重配置消息依次进行发送。
可选地，作为另一种实施例，处理器1020还用于，在向所述源宿主发送切换响应之前，确定多个所述IAB节点与所述目标宿主之间的节点跳数；按照节点跳数对多个所述IAB节点的RRC重配置消息进行升序排序，得到所述RRC重配置消息序列。
可选地，作为另一种实施例，处理器1020还用于，在向所述源宿主发送切换响应之前，确定多个所述IAB节点与所述目标宿主之间的节点跳数；按照节点跳数对多个所述IAB节点的RRC重配置消息进行降序排序，得到所述RRC重配置消息序列。
在此需要说明的是，本申请实施例提供的上述目标宿主，能够实现上述方法实施例所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
图11是根据本申请实施例提供的一种连接建立装置的结构示意图。如图11所示，该连接建立装置应用于接入回传一体化IAB节点，所述的连接建立装置110包括：
发送单元1101，用于向目标宿主发送F1连接建立请求，其中，所述F1连接建立请求，用于请求建立所述IAB节点与所述目标宿主之间的F1连接；所述目标宿主为所述IAB节点待切换至的宿主；
接收单元1102，用于接收所述目标宿主发送的F1消息；
所述发送单元1101，还用于向所述IAB节点的子节点发送指示信息，所述指示信息用于触发所述IAB节点的子节点的F1连接建立或迁移。
进一步地，所述F1消息中携带有RRC信令；所述发送单元1101，具体用于向所述IAB节点的子节点发送所述RRC信令，用于触发所述子节点的F1连接建立或迁移。
进一步地，所述发送单元1101，具体用于向所述IAB节点的子节点发送回传适应协议BAP层信令，用于触发所述子节点的F1连接建立或迁移。
进一步地，所述发送单元1101，具体用于接收所述目标宿主发送的F1接口信令；向 所述IAB节点的子节点发送所述F1接口信令，用于触发所述子节点的F1连接建立或迁移。
进一步地，所述IAB节点包括顶层迁移节点或非顶层迁移节点。
进一步地，所述IAB节点为切换至所述目标宿主的顶层迁移节点。所述接收单元1102，还用于接收源宿主发送的RRC重配置消息，其中，所述RRC重配置消息，是所述目标宿主向所述源宿主发送的切换响应中携带的，所述RRC重配置消息中携带有所述IAB节点的配置参数；所述源宿主为所述IAB节点切换前的宿主；根据所述IAB节点的配置参数，对所述IAB节点进行重配置。
进一步地，所述RRC重配置消息中还携带有所述目标宿主下接入节点的全球小区识别码CGI；所述的装置还包括：接入单元，根据所述目标宿主下接入节点的CGI，进行随机接入过程。
进一步地，所述发送单元1101，具体用于采用所述默认信道和所述默认路由向所述目标宿主发送所述F1连接建立请求。
进一步地，所述IAB节点为切换至所述目标宿主的非顶层迁移节点；所述接收单元1102，还用于接收所述IAB节点的母节点发送的RRC重配置消息，其中，所述RRC重配置消息，是所述目标宿主向源宿主发送的切换响应中携带的，由所述源宿主发送到所述母节点；所述源宿主为所述IAB节点切换前的宿主；根据所述RRC重配置消息，对所述IAB节点进行重配置；接收所述母节点发送的指示信息。
进一步地，所述发送单元1101，还用于向所述母节点发送RRC重配置完成消息，用于通过所述母节点与所述目标宿主之间的F1连接将所述RRC重配置完成消息发送至所述目标宿主。
进一步地，所述默认信道是默认回传无线链路控制BH RLC信道；所述默认路由是默认回传适应协议BAP标识路由。
本申请实施例提供的连接建立装置，通过向目标宿主发送F1连接建立请求，其中，所述F1连接建立请求，用于请求建立所述IAB节点与所述目标宿主之间的F1连接；目标宿主为IAB节点待切换至的宿主；接收所述目标宿主发送的F1消息；向IAB节点的子节点发送指示信息，指示信息用于触发所述IAB节点的子节点的F1连接建立或迁移。由此，IAB节点在F1连接建立成功后，可以向子节点发送指示信息，用于触发子节点的F1连接建立或迁移，实现IAB节点及其子孙节点与目标宿主建立新的F1连接或者迁移。
其中，方法和装置是基于同一申请构思的，由于方法和装置解决问题的原理相似，因此装置和方法的实施可以相互参见，重复之处不再赘述。
图12是根据本申请实施例提供的一种连接建立装置的结构示意图。如图12所示，所 述装置应用于目标宿主，所述的连接建立装置120包括：
接收单元1201，用于接收接入回传一体化IAB节点的F1连接建立请求，其中，所述目标宿主为IAB节点待切换至的宿主；所述F1连接建立请求，用于请求建立所述IAB节点与所述目标宿主之间的F1连接；
发送单元1202，用于向所述IAB节点发送F1连接建立成功指示以及指示信息，其中，所述指示信息，用于触发所述IAB节点的子节点的F1连接建立或迁移。
进一步地，所述发送单元1202，具体用于向所述IAB节点发送F1消息，用于指示所述IAB节点F1连接建立成功；其中，所述F1消息携带有RRC信令，用于触发所述IAB节点的子节点的F1连接建立或迁移。
进一步地，所述发送单元1202，具体用于向所述IAB节点发送F1消息，用于指示所述IAB节点F1连接建立成功；向所述IAB节点发送F1接口信令，用于触发所述IAB节点的子节点的F1连接建立或迁移。
进一步地，所述接收单元1201，还用于接收所述源宿主发送的切换请求，其中，所述源宿主为所述IAB节点切换前的宿主；向所述源宿主发送切换响应，其中，所述切换响应携带有所述IAB节点的RRC重配置消息，用于对所述IAB节点进行重配置。
进一步地，所述IAB节点包括顶层迁移节点或非顶层迁移节点。
进一步地，所述IAB节点为切换至所述目标宿主的顶层迁移节点；所述接收单元1201，还用于接收所述IAB节点发送的RRC重配置完成消息，其中，所述RRC重配置完成消息是所述IAB节点根据所述RRC重配置消息进行重配置之后发送的消息。
进一步地，所述IAB节点为切换至所述目标宿主的非顶层迁移节点；所述接收单元1201，还用于接收所述IAB节点的母节点发送的RRC重配置完成消息，其中，所述RRC重配置完成消息是所述IAB节点根据所述RRC重配置消息进行重配置之后发送到所述母节点，所述母节点通过与所述目标宿主之间的F1连接发送的。
进一步地，所述IAB节点的数量为多个，所述RRC重配置消息的数量为多个；所述切换响应中携带有RRC重配置消息序列，用于按照所述RRC重配置消息序列对多个所述RRC重配置消息依次进行发送。
进一步地，所述的装置还包括：第一确定单元，用于确定多个所述IAB节点与所述目标宿主之间的节点跳数；按照节点跳数对多个所述IAB节点的RRC重配置消息进行升序排序，得到所述RRC重配置消息序列。
进一步地，所述的装置还包括：第二确定单元，用于确定多个所述IAB节点与所述目标宿主之间的节点跳数；按照节点跳数对多个所述IAB节点的RRC重配置消息进行降序排序，得到所述RRC重配置消息序列。
本申请实施例提供的连接建立装置，接收接入回传一体化IAB节点的F1连接建立请求，其中，目标宿主为IAB节点待切换至的宿主；F1连接建立请求，用于请求建立IAB节点与目标宿主之间的F1连接；向IAB节点发送F1连接建立成功指示以及指示信息，其中，指示信息，用于触发IAB节点的子节点的F1连接建立或迁移。由此，在IAB节点的F1连接建立成功后，可以向IAB节点的子节点发送指示信息，触发子节点的F1连接建立或迁移，实现IAB节点及其子孙节点与目标宿主建立新的F1连接或迁移。
其中，方法和装置是基于同一申请构思的，由于方法和装置解决问题的原理相似，因此装置和方法的实施可以相互参见，重复之处不再赘述。
需要说明的是，本申请实施例中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个处理器可读取存储介质中。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或者该技术方案的全部或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中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络侧设备等)或处理器(processor)执行本申请各个实施例方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
另一方面，本申请实施例还提供一种处理器可读存储介质，处理器可读存储介质存储有计算机程序，计算机程序用于使处理器执行本本申请图1实施例所示的连接建立方法。
另一方面，本申请实施例还提供一种处理器可读存储介质，处理器可读存储介质存储有计算机程序，计算机程序用于使处理器执行本本申请图2实施例所示的连接建立方法。
其中，上述处理器可读存储介质可以是处理器能够存取的任何可用介质或数据存储设备，包括但不限于磁性存储器(例如软盘、硬盘、磁带、磁光盘(MO)等)、光学存储器(例如CD、DVD、BD、HVD等)、以及半导体存储器(例如ROM、EPROM、EEPROM、非易失性存储器(NAND FLASH)、固态硬盘(SSD))等。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机 可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机可执行指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机可执行指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些处理器可执行指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的处理器可读存储器中，使得存储在该处理器可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些处理器可执行指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (45)

  1. 一种连接建立方法，其特征在于，所述方法应用于接入回传一体化IAB节点，所述方法包括：
    向目标宿主发送F1连接建立请求，其中，所述F1连接建立请求，用于请求建立所述IAB节点与所述目标宿主之间的F1连接；所述目标宿主为所述IAB节点待切换至的宿主；
    接收所述目标宿主发送的F1消息；
    向所述IAB节点的子节点发送指示信息，所述指示信息用于触发所述IAB节点的子节点的F1连接建立或迁移。
  2. 根据权利要求1所述的连接建立方法，其特征在于，所述F1消息中携带有RRC信令；
    所述向所述IAB节点的子节点发送指示信息，包括：
    向所述IAB节点的子节点发送所述RRC信令，用于触发所述子节点的F1连接建立或迁移。
  3. 根据权利要求1所述的连接建立方法，其特征在于，所述向所述IAB节点的子节点发送指示信息，包括：
    向所述IAB节点的子节点发送回传适应协议BAP层信令，用于触发所述子节点的F1连接建立或迁移。
  4. 根据权利要求1所述的连接建立方法，其特征在于，所述向所述IAB节点的子节点发送指示信息，包括：
    接收所述目标宿主发送的F1接口信令；
    向所述IAB节点的子节点发送所述F1接口信令，用于触发所述子节点的F1连接建立或迁移。
  5. 根据权利要求1所述的连接建立方法，其特征在于，所述IAB节点包括顶层迁移节点或非顶层迁移节点。
  6. 根据权利要求5所述的连接建立方法，其特征在于，所述IAB节点为切换至所述目标宿主的顶层迁移节点；
    所述向所述目标宿主发送F1连接建立请求之前，还包括：
    接收源宿主发送的RRC重配置消息，其中，所述RRC重配置消息，是所述目标宿主向所述源宿主发送的切换响应中携带的，所述RRC重配置消息中携带有所述IAB节点的配置参数；所述源宿主为所述IAB节点切换前的宿主；
    根据所述IAB节点的配置参数，对所述IAB节点进行重配置。
  7. 根据权利要求6所述的连接建立方法，其特征在于，所述RRC重配置消息中还携带有所述目标宿主下接入节点的全球小区识别码CGI；
    所述根据所述IAB节点的配置参数，对所述IAB节点进行重配置之后，还包括：
    根据所述目标宿主下接入节点的CGI，进行随机接入过程。
  8. 根据权利要求6所述的连接建立方法，其特征在于，所述RRC重配置消息中还携带有所述目标宿主与所述IAB节点之间的默认信道和默认路由的信息；
    所述向所述目标宿主发送F1连接建立请求，包括：
    采用所述默认信道和所述默认路由向所述目标宿主发送所述F1连接建立请求。
  9. 根据权利要求5所述的连接建立方法，其特征在于，所述IAB节点为切换至所述目标宿主的非顶层迁移节点；
    所述向所述目标宿主发送F1连接建立请求之前，还包括：
    接收所述IAB节点的母节点发送的RRC重配置消息，其中，所述RRC重配置消息，是所述目标宿主向源宿主发送的切换响应中携带的，由所述源宿主发送到所述母节点；所述源宿主为所述IAB节点切换前的宿主；
    根据所述RRC重配置消息，对所述IAB节点进行重配置；
    接收所述母节点发送的指示信息。
  10. 根据权利要求9所述的连接建立方法，其特征在于，所述根据所述RRC重配置消息，对所述IAB节点进行重配置之后，还包括：
    向所述母节点发送RRC重配置完成消息，用于通过所述母节点与所述目标宿主之间的F1连接将所述RRC重配置完成消息发送至所述目标宿主。
  11. 根据权利要求8所述的连接建立方法，其特征在于，所述默认信道是默认回传无线链路控制BH RLC信道；所述默认路由是默认回传适应协议BAP标识路由。
  12. 一种连接建立方法，其特征在于，所述方法应用于目标宿主，所述方法包括：
    接收接入回传一体化IAB节点的F1连接建立请求，其中，所述目标宿主为IAB节点待切换至的宿主；所述F1连接建立请求，用于请求建立所述IAB节点与所述目标宿主之间的F1连接；
    向所述IAB节点发送F1连接建立成功指示以及指示信息，其中，所述指示信息，用于触发所述IAB节点的子节点的F1连接建立或迁移。
  13. 根据权利要求12所述的连接建立方法，其特征在于，所述向所述IAB节点发送F1连接建立成功指示以及指示信息，包括：
    向所述IAB节点发送F1消息，用于指示所述IAB节点F1连接建立成功；
    其中，所述F1消息携带有RRC信令，用于触发所述IAB节点的子节点的F1连接建立或迁移。
  14. 根据权利要求12所述的连接建立方法，其特征在于，所述向所述IAB节点发送F1连接建立成功指示以及指示信息，包括：
    向所述IAB节点发送F1消息，用于指示所述IAB节点F1连接建立成功；
    向所述IAB节点发送F1接口信令，用于触发所述IAB节点的子节点的F1连接建立或迁移。
  15. 根据权利要求12所述的连接建立方法，其特征在于，所述接收接入回传一体化IAB节点的F1连接建立请求之前，还包括：
    接收源宿主发送的切换请求，其中，所述源宿主为所述IAB节点切换前的宿主；
    向所述源宿主发送切换响应，其中，所述切换响应携带有所述IAB节点的RRC重配置消息，用于对所述IAB节点进行重配置。
  16. 根据权利要求15所述的连接建立方法，其特征在于，所述IAB节点包括顶层迁移节点或非顶层迁移节点。
  17. 根据权利要求16所述的连接建立方法，其特征在于，所述IAB节点为切换至所述目标宿主的顶层迁移节点；
    所述的方法还包括：
    接收所述IAB节点发送的RRC重配置完成消息，其中，所述RRC重配置完成消息是所述IAB节点根据所述RRC重配置消息进行重配置之后发送的消息。
  18. 根据权利要求16所述的连接建立方法，其特征在于，所述IAB节点为切换至所述目标宿主的非顶层迁移节点；
    所述的方法还包括：
    接收所述IAB节点的母节点发送的RRC重配置完成消息，其中，所述RRC重配置完成消息是所述IAB节点根据所述RRC重配置消息进行重配置之后发送到所述母节点，所述母节点通过与所述目标宿主之间的F1连接发送的。
  19. 根据权利要求15所述的连接建立方法，其特征在于，所述IAB节点的数量为多个，所述RRC重配置消息的数量为多个；
    所述切换响应中携带有RRC重配置消息序列，用于按照所述RRC重配置消息序列对多个所述RRC重配置消息依次进行发送。
  20. 根据权利要求19所述的连接建立方法，其特征在于，所述向所述源宿主发送切换响应之前，还包括：
    确定多个所述IAB节点与所述目标宿主之间的节点跳数；
    按照节点跳数对多个所述IAB节点的RRC重配置消息进行升序排序，得到所述RRC重配置消息序列。
  21. 根据权利要求19所述的连接建立方法，其特征在于，所述向所述源宿主发送切换响应之前，还包括：
    确定多个所述IAB节点与所述目标宿主之间的节点跳数；
    按照节点跳数对多个所述IAB节点的RRC重配置消息进行降序排序，得到所述RRC重配置消息序列。
  22. 一种接入回传一体化IAB节点，其特征在于，所述IAB节点包括存储器，收发机，处理器：
    存储器，用于存储计算机程序；收发机，用于在所述处理器的控制下收发数据；处理器，用于读取所述存储器中的计算机程序并执行以下操作：
    向目标宿主发送F1连接建立请求，其中，所述F1连接建立请求，用于请求建立所述 IAB节点与所述目标宿主之间的F1连接；所述目标宿主为所述IAB节点待切换至的宿主；
    接收所述目标宿主发送的F1消息；
    向所述IAB节点的子节点发送指示信息，所述指示信息用于触发所述IAB节点的子节点的F1连接建立或迁移。
  23. 根据权利要求22所述的IAB节点，其特征在于，所述F1消息中携带有RRC信令；
    所述向所述IAB节点的子节点发送指示信息，包括：
    向所述IAB节点的子节点发送所述RRC信令，用于触发所述子节点的F1连接建立或迁移。
  24. 根据权利要求22所述的IAB节点，其特征在于，所述向所述IAB节点的子节点发送指示信息，包括：
    向所述IAB节点的子节点发送回传适应协议BAP层信令，用于触发所述子节点的F1连接建立或迁移。
  25. 根据权利要求22所述的IAB节点，其特征在于，所述向所述IAB节点的子节点发送指示信息，包括：
    接收所述目标宿主发送的F1接口信令；
    向所述IAB节点的子节点发送所述F1接口信令，用于触发所述子节点的F1连接建立或迁移。
  26. 根据权利要求22所述的IAB节点，其特征在于，所述IAB节点包括顶层迁移节点或非顶层迁移节点。
  27. 根据权利要求26所述的IAB节点，其特征在于，所述IAB节点为切换至所述目标宿主的顶层迁移节点；
    所述向所述目标宿主发送F1连接建立请求之前，还包括：
    接收源宿主发送的RRC重配置消息，其中，所述RRC重配置消息，是所述目标宿主向所述源宿主发送的切换响应中携带的，所述RRC重配置消息中携带有所述IAB节点的配置参数；所述源宿主为所述IAB节点切换前的宿主；
    根据所述IAB节点的配置参数，对所述IAB节点进行重配置。
  28. 根据权利要求27所述的IAB节点，其特征在于，所述RRC重配置消息中还携带有所述目标宿主下接入节点的全球小区识别码CGI；
    所述根据所述IAB节点的配置参数，对所述IAB节点进行重配置之后，还包括：
    根据所述目标宿主下接入节点的CGI，进行随机接入过程。
  29. 根据权利要求27所述的IAB节点，其特征在于，所述RRC重配置消息中还携带有所述目标宿主与所述IAB节点之间的默认信道和默认路由的信息；
    所述向所述目标宿主发送F1连接建立请求，包括：
    采用所述默认信道和所述默认路由向所述目标宿主发送所述F1连接建立请求。
  30. 根据权利要求26所述的IAB节点，其特征在于，所述IAB节点为切换至所述目标宿主的非顶层迁移节点；
    所述向所述目标宿主发送F1连接建立请求之前，还包括：
    接收所述IAB节点的母节点发送的RRC重配置消息，其中，所述RRC重配置消息，是所述目标宿主向源宿主发送的切换响应中携带的，由所述源宿主发送到所述母节点；所述源宿主为所述IAB节点切换前的宿主；
    根据所述RRC重配置消息，对所述IAB节点进行重配置；
    接收所述母节点发送的指示信息。
  31. 根据权利要求30所述的IAB节点，其特征在于，所述根据所述RRC重配置消息，对所述IAB节点进行重配置之后，还包括：
    向所述母节点发送RRC重配置完成消息，用于通过所述母节点与所述目标宿主之间的F1连接将所述RRC重配置完成消息发送至所述目标宿主。
  32. 根据权利要求29所述的IAB节点，其特征在于，所述默认信道是默认回传无线链路控制BH RLC信道；所述默认路由是默认回传适应协议BAP标识路由。
  33. 一种目标宿主，其特征在于，包括存储器，收发机，处理器：
    存储器，用于存储计算机程序；收发机，用于在所述处理器的控制下收发数据；处理器，用于读取所述存储器中的计算机程序并执行以下操作：
    接收接入回传一体化IAB节点的F1连接建立请求，其中，所述目标宿主为IAB节点 待切换至的宿主；所述F1连接建立请求，用于请求建立所述IAB节点与所述目标宿主之间的F1连接；
    向所述IAB节点发送F1连接建立成功指示以及指示信息，其中，所述指示信息，用于触发所述IAB节点的子节点的F1连接建立或迁移。
  34. 根据权利要求33所述的目标宿主，其特征在于，所述向所述IAB节点发送F1连接建立成功指示以及指示信息，包括：
    向所述IAB节点发送F1消息，用于指示所述IAB节点F1连接建立成功；
    其中，所述F1消息携带有RRC信令，用于触发所述IAB节点的子节点的F1连接建立或迁移。
  35. 根据权利要求33所述的目标宿主，其特征在于，所述向所述IAB节点发送F1连接建立成功指示以及指示信息，包括：
    向所述IAB节点发送F1消息，用于指示所述IAB节点F1连接建立成功；
    向所述IAB节点发送F1接口信令，用于触发所述IAB节点的子节点的F1连接建立或迁移。
  36. 根据权利要求33所述的目标宿主，其特征在于，所述接收接入回传一体化IAB节点的F1连接建立请求之前，还包括：
    接收源宿主发送的切换请求，其中，所述源宿主为所述IAB节点切换前的宿主；
    向所述源宿主发送切换响应，其中，所述切换响应携带有所述IAB节点的RRC重配置消息，用于对所述IAB节点进行重配置。
  37. 根据权利要求36所述的目标宿主，其特征在于，所述IAB节点包括顶层迁移节点或非顶层迁移节点。
  38. 根据权利要求37所述的目标宿主，其特征在于，所述IAB节点为切换至所述目标宿主的顶层迁移节点；
    所述处理器还执行以下操作：
    接收所述IAB节点发送的RRC重配置完成消息，其中，所述RRC重配置完成消息是所述IAB节点根据所述RRC重配置消息进行重配置之后发送的消息。
  39. 根据权利要求37所述的目标宿主，其特征在于，所述IAB节点为切换至所述目标宿主的非顶层迁移节点；
    所述处理器还执行以下操作：
    接收所述IAB节点的母节点发送的RRC重配置完成消息，其中，所述RRC重配置完成消息是所述IAB节点根据所述RRC重配置消息进行重配置之后发送到所述母节点，所述母节点通过与所述目标宿主之间的F1连接发送的。
  40. 根据权利要求36所述的目标宿主，其特征在于，所述IAB节点的数量为多个，所述RRC重配置消息的数量为多个；
    所述切换响应中携带有RRC重配置消息序列，用于按照所述RRC重配置消息序列对多个所述RRC重配置消息依次进行发送。
  41. 根据权利要求40所述的目标宿主，其特征在于，所述向所述源宿主发送切换响应之前，还包括：
    确定多个所述IAB节点与所述目标宿主之间的节点跳数；
    按照节点跳数对多个所述IAB节点的RRC重配置消息进行升序排序，得到所述RRC重配置消息序列。
  42. 根据权利要求40所述的目标宿主，其特征在于，所述向所述源宿主发送切换响应之前，还包括：
    确定多个所述IAB节点与所述目标宿主之间的节点跳数；
    按照节点跳数对多个所述IAB节点的RRC重配置消息进行降序排序，得到所述RRC重配置消息序列。
  43. 一种连接建立装置，其特征在于，所述装置应用于接入回传一体化IAB节点，所述装置包括：
    发送单元，用于向目标宿主发送F1连接建立请求，其中，所述F1连接建立请求，用于请求建立所述IAB节点与所述目标宿主之间的F1连接；所述目标宿主为所述IAB节点待切换至的宿主；
    接收单元，用于接收所述目标宿主发送的F1消息；
    所述发送单元，还用于向所述IAB节点的子节点发送指示信息，所述指示信息用于触发所述IAB节点的子节点的F1连接建立或迁移。
  44. 一种连接建立装置，其特征在于，所述装置应用于目标宿主，所述装置包括：
    接收单元，用于接收接入回传一体化IAB节点的F1连接建立请求，其中，所述目标宿主为IAB节点待切换至的宿主；所述F1连接建立请求，用于请求建立所述IAB节点与所述目标宿主之间的F1连接；
    发送单元，用于向所述IAB节点发送F1连接建立成功指示以及指示信息，其中，所述指示信息，用于触发所述IAB节点的子节点的F1连接建立或迁移。
  45. 一种处理器可读存储介质，其特征在于，所述处理器可读存储介质存储有计算机程序，所述计算机程序用于使所述处理器执行权利要求1至11任一项所述的方法，或者，权利要求12至21任一项所述的方法。
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