CN114390601A

CN114390601A - Control signaling transmission method, device, IAB node, source host and target host

Info

Publication number: CN114390601A
Application number: CN202011109570.6A
Authority: CN
Inventors: 刘子乔; 王达
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2022-04-22
Anticipated expiration: 2040-10-16
Also published as: CN114390601B

Abstract

The application discloses a control signaling transmission method, a control signaling transmission device, an IAB node, a target host, a source host and a storage medium, and relates to the technical field of communication. The specific implementation scheme is as follows: the IAB node transmits the control signaling with the target host by acquiring the information of the default channel and the default route between the target host and the IAB node and then adopting the default channel and the default route. Therefore, in the process of switching the IAB node from the source host to the target host, the control signaling can be transmitted through the default channel and the default route, and the completion of the migration of the upper-layer IAB node is not required to be waited, so that the time delay of message transmission is reduced.

Description

Control signaling transmission method, device, IAB node, source host and target host

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting a control signaling, an IAB node, a source host, and a target host.

Background

With the development of an access Backhaul and Backhaul (IAB) technology, there is a higher requirement for migration of an IAB node, where in related technologies, in order to switch an IAB node and its node from a source host to a target host, a layer-by-layer migration manner of the IAB node and its child nodes is required.

By the migration mode, all the sub-nodes of the IAB node can transmit the control signaling only when the IAB node on the upper layer is migrated, so that the time delay of the transmission of the control signaling is longer.

Disclosure of Invention

The application provides a control signaling transmission method, an access backhaul integrated IAB node, a target host, a source host, a device and a storage medium.

According to an aspect of the present application, a control signaling transmission method is provided, where the method is applied to an access backhaul integrated IAB node, and the method includes: acquiring information of a default channel and a default route between a target host and the IAB node; wherein the target host is a host to which the IAB node is to be switched; transmitting control signaling with the target host by adopting the default channel and the default route; wherein the control signaling comprises at least one of a Radio Resource Control (RRC) reconfiguration message, an RRC reconfiguration complete message, an F1 connection setup request, and an F1 connection setup response message.

Optionally, the obtaining information of a default channel and a default route between the target host and the IAB node includes:

receiving a first RRC reconfiguration message; wherein the first RRC reconfiguration message carries information of a default channel and a default route between the target host and the IAB node.

Optionally, the transmitting control signaling with the target host by using the default channel and the default route includes:

and under the condition that the IAB node is reconfigured completely, sending a first RRC reconfiguration complete message to the target host by adopting the default channel and the default route.

Optionally, after the sending the first RRC reconfiguration complete message to the target host by using the default channel and the default route, the method further includes:

sending an F1 connection establishment request message to the target host by adopting the default channel and the default route; wherein the F1 connection establishment request is used for requesting to establish an F1 connection between the IAB node and the target host;

and receiving an F1 connection establishment response message sent by the target host by adopting the default channel and the default route.

Optionally, the IAB node is a parent node of the UE, and before receiving the first RRC reconfiguration message, the method further includes:

receiving a second RRC reconfiguration message through an F1 connection with the source host; the second RRC reconfiguration message carries configuration parameters for reconfiguring the UE; the source host is a host before the IAB node is switched;

sending the second RRC reconfiguration message to the UE through a Uu interface between the IAB node and the UE;

receiving a second RRC reconfiguration complete message sent under the condition that the UE reconfiguration is completed;

after receiving the first RRC reconfiguration message, the method further includes:

and sending the second RRC reconfiguration complete message to the target host by adopting a default channel and the default route between the target host and the IAB node.

Optionally, the receiving the first RRC reconfiguration message includes:

receiving the first RRC reconfiguration message sent by a source host, wherein the first RRC reconfiguration message is carried in a handover response sent by the target host to the source host; the source host is a host before the IAB node is switched.

Optionally, the receiving the first RRC reconfiguration message includes:

and receiving the first RRC reconfiguration message sent by the parent node of the IAB, wherein the first RRC reconfiguration message is sent to the parent node by the target host through a default channel and a default route between the target host and the parent node.

Optionally, the parent node of the IAB is a top-level migration node that is switched to the target host; a default channel and a default route between the target host and the parent node are carried in a third RRC reconfiguration message sent by the source host, and the third reconfiguration message is carried in a handover response sent by the target host to the source host; the source host is a host before the IAB node is switched.

Optionally, after receiving the first RRC reconfiguration message, the method further includes:

receiving a fourth RRC reconfiguration message sent by the target host through a default channel and a default route between the target host and the IAB node; wherein, the fourth RRC reconfiguration message carries a default channel and a default route between a next-hop communication node of the IAB node and the target host, and the next-hop communication node is a UE or a child IAB node of the IAB node;

sending the fourth RRC reconfiguration message to the next-hop communication node.

Optionally, the default channel is a default backhaul radio link control channel; the default route is a default backhaul adaptation protocol route identification.

According to another aspect of the present application, there is provided a control signaling transmission method, which is applied to a target host, and includes:

sending information of a default channel and a default route between the target host and the first access backhaul integrated IAB node; wherein the first IAB node is to be switched from a source host to the target host; transmitting a control signaling with the first IAB node by adopting the default channel and the default route; wherein the control signaling comprises at least one of a Radio Resource Control (RRC) reconfiguration message, an RRC reconfiguration complete message, an F1 connection setup request, and an F1 connection setup response message.

Optionally, the sending information of the default channel and the default route between the target host and the first IAB node includes:

sending a handover response to the source host, wherein the handover response carries a first RRC reconfiguration message, which is used to instruct the source host to send the first RRC reconfiguration message to the first IAB node; the first RRC reconfiguration message carries information of a default channel and a default route between the target host and the first IAB node.

Optionally, the transmitting control signaling with the first IAB node by using the default channel and the default route includes:

receiving a first RRC reconfiguration complete message of the first IAB node by adopting the default channel and the default route between the target host and the first IAB node.

Optionally, the handover response further carries a second RRC reconfiguration message of the terminal UE, where the second RRC reconfiguration message carries configuration parameters for reconfiguring the UE;

after the sending of the handover response to the source host, the method further includes:

and receiving a second RRC reconfiguration complete message sent by the parent node by adopting the default channel and the default route between the target host and a first IAB node serving as the parent node of the UE, wherein the second RRC reconfiguration complete message is used for representing that the UE is reconfigured completely.

Optionally, the sending information of the default channel and the default route between the target host and the first access backhaul integrated IAB node includes:

sending the first RRC reconfiguration message to a second IAB node by adopting a default channel and a default route between the target host and the second IAB node so as to send the first RRC reconfiguration message to the first IAB node through the second IAB node; wherein the second IAB node is a parent node of the first IAB node.

Optionally, before sending the first RRC reconfiguration message to the second IAB node by using a default channel and a default route between the target host and the second IAB node, the method further includes:

and sending a third RRC reconfiguration message to the second IAB node through the source host, wherein the third RRC reconfiguration message carries a default channel and a default route between the target host and the second IAB node.

Optionally, after receiving the first RRC reconfiguration complete message of the first IAB node by using the default channel and the default route between the target host and the first IAB node, the method further includes:

receiving an F1 connection establishment request message sent by the first IAB node by adopting the default channel and the default route;

establishing an F1 connection between the first IAB node and the target host;

sending an F1 connection setup response message to the first IAB node using the default channel and the default route.

According to another aspect of the present application, there is provided a control signaling transmission method, wherein the method is applied to a source host, and the method includes: acquiring a first RRC reconfiguration message sent by a target host, wherein the first RRC reconfiguration message carries configuration parameters for reconfiguring a first IAB node, and information of a default channel and a default route between the target host and the first IAB node; the first IAB node is to be switched to the target host from a source host; sending the first RRC reconfiguration message to the first IAB node; the first RRC reconfiguration message is configured to instruct the first IAB node to perform reconfiguration according to the configuration parameter, and send a first RRC reconfiguration complete message to the target host by using a default channel and a default route between the target host and the first IAB node.

Optionally, the obtaining the first RRC reconfiguration message sent by the target host includes:

sending a handover request to the target host;

and receiving a handover response sent by the target host, wherein the handover response carries the first RRC reconfiguration message.

Optionally, the handover request further carries a second RRC reconfiguration message of the terminal UE, where the second RRC reconfiguration message carries configuration parameters for reconfiguring the UE;

after receiving the handover response sent by the target host, the method further includes:

sending the second RRC reconfiguration message to a parent node of the UE through an F1 connection with the parent node; and the second RRC reconfiguration message is used to instruct the UE to reconfigure and send a second RRC reconfiguration complete message to the parent node when the configuration is completed, so that the parent node sends the second RRC reconfiguration complete message to the target host by using a default channel and a default route between the parent node and the target host.

Optionally, the number of the first IAB nodes is multiple, and the sending the first RRC reconfiguration message to the first IAB node includes:

sending the first RRC reconfiguration message to each first IAB node in parallel;

or, the first RRC reconfiguration message is sent to each of the first IAB nodes according to a set order.

According to another aspect of the present application, there is provided an access backhaul integrated IAB node, wherein the IAB node comprises a memory, a transceiver, a processor: a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations: acquiring information of a default channel and a default route between the target host and the IAB node; transmitting control signaling with the target host by adopting the default channel and the default route; wherein the control signaling comprises at least one of a Radio Resource Control (RRC) reconfiguration message, an RRC reconfiguration complete message, an F1 connection setup request, and an F1 connection setup response message.

receiving a second RRC reconfiguration message through an F1 connection with the source host; the second RRC reconfiguration message carries configuration parameters for reconfiguring the UE; the source host is a host before the IAB node is switched; (ii) a

Optionally, the receiving the first RRC reconfiguration message includes:

According to another aspect of the present application, there is provided a target host comprising a memory, a transceiver, a processor: a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

and sending a handover response to the source host, where the handover response carries a first RRC reconfiguration message, which is used to instruct the source host to send the first RRC reconfiguration message to the first IAB node, where the first RRC reconfiguration message carries information of a default channel and a default route between the target host and the first IAB node.

According to another aspect of the present application, there is provided a source host comprising a memory, a transceiver, a processor: a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations: acquiring a first RRC reconfiguration message sent by a target host, wherein the first RRC reconfiguration message carries configuration parameters for reconfiguring a first IAB node, and information of a default channel and a default route between the target host and the first IAB node; the first IAB node is to be switched to the target host from a source host; sending the first RRC reconfiguration message to the first IAB node; the first RRC reconfiguration message is configured to instruct the first IAB node to perform reconfiguration according to the configuration parameter, and send a first RRC reconfiguration complete message to the target host by using a default channel and a default route between the target host and the first IAB node.

sending a handover request to the target host;

According to another aspect of the present application, there is provided a control signaling transmission apparatus, which is applied to an access backhaul integrated IAB node, and includes:

an information acquiring unit, configured to acquire information of a default channel and a default route between a target host and the IAB node; wherein the target host is a host to which the IAB node is to be switched; a first transmission instruction unit, configured to transmit a control signaling with the target host by using the default channel and the default route; wherein the control signaling comprises at least one of a Radio Resource Control (RRC) reconfiguration message, an RRC reconfiguration complete message, an F1 connection setup request, and an F1 connection setup response message.

According to another aspect of the present application, there is provided a control signaling transmission apparatus, the apparatus being applied to a target host, the apparatus including:

a sending information unit, configured to send information of a default channel and a default route between the target host and the first access backhaul integrated IAB node; wherein the first IAB node is to be switched from a source host to the target host; a second transmission instruction unit, configured to transmit a control signaling with the first IAB node by using the default channel and the default route; wherein the control signaling comprises at least one of a Radio Resource Control (RRC) reconfiguration message, an RRC reconfiguration complete message, an F1 connection setup request, and an F1 connection setup response message.

According to another aspect of the present application, there is provided a control signaling transmission apparatus, the apparatus being applied to a source host, the apparatus including: a first obtaining unit, configured to obtain a first RRC reconfiguration message sent by a target host, where the first RRC reconfiguration message carries configuration parameters for reconfiguring a first IAB node, and information of a default channel and a default route between the target host and the first IAB node; the first IAB node is to be switched to the target host from a source host; a third sending unit, configured to send the first RRC reconfiguration message to the first IAB node; the first RRC reconfiguration message is configured to instruct the first IAB node to perform reconfiguration according to the configuration parameter, and send a first RRC reconfiguration complete message to the target host by using a default channel and a default route between the target host and the first IAB node.

According to another aspect of the present application, a processor-readable storage medium is provided that stores a computer program for causing a processor to execute a control signaling transmission method for access to a backhaul integrated IAB node, or to execute a control signaling transmission method for a target host, or to execute a control signaling transmission method for a source host.

The application has the following technical effects:

the IAB node transmits the control signaling with the target host by acquiring the information of the default channel and the default route between the target host and the IAB node and then adopting the default channel and the default route. Therefore, in the process of switching the IAB node from the source host to the target host, the transmission control signaling can be transmitted through the default channel and the default route, the upper layer IAB node does not need to wait for the completion of the migration, and the message transmission delay is reduced.

It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present application, nor do they limit the scope of the present application. Other features of the present application will become apparent from the following description.

Drawings

The drawings are included to provide a better understanding of the present solution and are not intended to limit the present application. Wherein:

fig. 1 is a schematic structural diagram of an IAB network provided in an embodiment of the present application;

fig. 2 is a schematic diagram of an IAB node being handed over from a source host to a target host in the prior art according to an embodiment of the present application;

fig. 3 is a flowchart illustrating a control signaling transmission method according to an embodiment of the present application;

fig. 4 is a flowchart illustrating a control signaling transmission method according to an embodiment of the present application;

fig. 5 is a flowchart illustrating a control signaling transmission method according to an embodiment of the present application;

fig. 6 is a flowchart illustrating another control signaling transmission method according to an embodiment of the present application;

fig. 7 is a flowchart illustrating a further control signaling transmission method according to an embodiment of the present application;

fig. 8 is a flowchart illustrating a control signaling transmission method according to another embodiment of the present application;

fig. 9 is a flowchart illustrating a control signaling transmission method according to another embodiment of the present application;

fig. 10 is a flowchart illustrating a control signaling transmission method according to another embodiment of the present application;

fig. 11 is a schematic structural diagram of an access backhaul integrated IAB node according to an embodiment of the present application;

FIG. 12 is a schematic diagram of a target host according to an embodiment of the present application;

FIG. 13 is a schematic diagram of a source host according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a control signaling transmission apparatus according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of a control signaling transmission apparatus according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of a control signaling transmission apparatus according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

That is, the term "and/or" in the embodiments of the present invention describes an association relationship of associated objects, and indicates that three relationships may exist, for example, a and/or B, and may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

In the related art, as shown in fig. 1, an IAB network is composed of an IAB host (donor), an IAB node (node), and a User Equipment (UE). The IAB host includes two parts, i.e., an IAB host Centralized Unit (IAB Centralized Unit, IAB dor CU) and an IAB host Distributed Unit (IAB Distributed Unit, IAB dor DU), wherein a plurality of IAB dor DUs may exist under one IAB dor CU. The IAB node is composed of an IAB Distributed Unit (IAB node DU) and an IAB Mobile terminal (IAB Mobile Termination, IAB node MT). The IAB node DU part is connected to the IAB node CU through an F1 interface, and the IAB node MT part is connected to the IAB node DU of the next layer through a Uu interface. If the next layer of the IAB node is connected with the UE, the DU part of the IAB node is connected with the UE.

In the process of switching the IAB node from the source host to the target host, as shown in fig. 2, for example, the IAB node 5 is a migration node, the IAB node 6 below the migration node is a child node, the IAB node 7 is a grandchild node, and the UE is connected below the IAB node 7.

However, in this way of switching to the target host layer by layer, the descendant node of the migration node can send the transmission control signaling only when the IAB node on the upper layer is migrated, and thus the time delay for sending the message is large.

The terminal provided in the above embodiments may be a terminal device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or other processing device connected to a wireless modem. In different systems, the names of the terminal devices may be different, for example, in a 5G system, the terminal device may be called a User Equipment (UE). A wireless terminal device, which may be a mobile terminal device such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal device, for example, a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, may communicate with one or more Core Networks (CNs) via a Radio Access Network (RAN). Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). The wireless terminal device may also be referred to as a system, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile), a remote station (remote station), an access point (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 this embodiment of the present application.

In order to solve the above problem, an embodiment of the present application provides a control signaling transmission method, an IAB node, a target host, a source host, an apparatus, and a storage medium, where the IAB node transmits a control signaling with the target host by acquiring information of a default channel and a default route between the target host and the IAB node, and then by using the default channel and the default route. Therefore, in the process of switching the IAB node from the source host to the target host, the transmission of the transmission control signaling can be realized through the default channel and the default route, and the completion of the migration of the IAB node on the upper layer does not need to be waited, so that the time delay of message transmission is reduced, and the technical problem that the transmission control signaling can be sent only when the IAB node on the upper layer needs to wait for the completion of the migration of the IAB node on the upper layer, so that the time delay of message transmission is larger is solved.

The control signaling transmission method, the IAB node, the target host, the source host, the apparatus, and the storage medium of the present embodiment are described below with reference to the drawings.

It should be noted that the technical solution provided in the embodiments of the present application can be applied to various systems, especially 5G systems. For example, the applicable system may be a global system for mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) system, a long term evolution (long term evolution, LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD) system, an LTE-a (long term evolution) system, a universal mobile system (universal mobile telecommunications system, UMTS), a Worldwide Interoperability for Mobile Access (WiMAX) system, a New Radio network (NR 5) system, etc. These various systems include terminal devices and network devices. The System may further include a core network portion, such as an Evolved Packet System (EPS), a 5G System (5GS), and the like.

Fig. 3 is a flowchart illustrating a control signaling transmission method according to an embodiment of the present application, where the control signaling transmission method is applied to an IAB node.

As shown in fig. 3, the method includes:

and step 31, acquiring information of a default channel and a default route between the target host and the IAB node.

Wherein the default channel is a default backhaul radio link control channel, and the default route is a default backhaul adaptive protocol route identifier.

Wherein, the target host is a host to which the IAB node is to be switched.

In an embodiment of the present application, the reconfiguration may be performed by receiving a first RRC (Radio Resource Control) reconfiguration message; wherein, the first RRC reconfiguration message carries information of a default channel and a default route between the target host and the IAB node.

For example, the source host may send a handover request to the target host, which receives the handover request, and may send a handover response to the source host in response to the handover request. The switching request carries a first RRC reconfiguration message, which is used to instruct the source host to send the first RRC reconfiguration message to the IAB node, and the IAB node may further receive the first RRC reconfiguration message sent by the source host, where the first RRC reconfiguration message carries information of a default channel and a default route between the target host and the IAB node.

Wherein the source host is a host before the IAB node is switched.

And step 32, adopting a default channel and a default route to transmit the control signaling with the target host.

Wherein the control signaling comprises at least one of an RRC reconfiguration message, an RRC reconfiguration complete message, an F1 connection setup request and an F1 connection setup response message.

As an implementation manner of an embodiment, when the IAB node is reconfigured, a first RRC reconfiguration complete message corresponding to the first RRC reconfiguration message may be sent to the target host by using a default channel and the default route.

As another implementation manner of the embodiment, the IAB node may send an F1 connection establishment request message to the target host by using a default channel and a default route, where the F1 connection establishment request is used to request to establish an F1 connection between the IAB node and the target host.

As a further implementation manner of the embodiment, the IAB node may receive the RRC reconfiguration message sent by the target host by using the default channel and the default route, where it should be noted that the RRC reconfiguration message received by using the default channel and the default route is different from the first RRC reconfiguration message carrying the default channel and the default route information in step 01. It should be further noted that the RRC reconfiguration message received by the IAB node using the default channel and the default route may be an RRC reconfiguration message sent by the target host for reconfiguring the IAB node, or an RRC reconfiguration message sent by the target host for reconfiguring a next-hop communication node of the IAB node by the user, where the next-hop communication node may be a UE or a child node of the IAB node.

The embodiment of the application provides a control signaling transmission method, an IAB node transmits a control signaling with a target host by acquiring information of a default channel and a default route between the target host and the IAB node and then adopting the default channel and the default route. Therefore, in the process of switching the IAB node from the source host to the target host, the transmission of the transmission control signaling can be realized through the default channel and the default route, and the completion of the migration of the IAB node on the upper layer does not need to be waited, so that the time delay of message transmission is reduced, and the technical problem that the transmission control signaling can be sent only when the IAB node on the upper layer needs to wait for the completion of the migration of the IAB node on the upper layer, so that the time delay of message transmission is larger is solved.

In order to make the present application more easily understood, fig. 4 is a flowchart illustrating a control signaling transmission method provided in an embodiment of the present application, where the control signaling transmission method is applied to an IAB node.

As shown in fig. 4, the method includes:

step 41, receiving a first RRC reconfiguration message.

The first RRC reconfiguration message carries configuration parameters of the IAB node, and information of a default channel and a default route between the target host and the IAB node.

The configuration parameters of the IAB node are used for reconfiguring the IAB node.

Wherein the default channel is a default backhaul radio link control channel (default RLC channel), and the default route is a default backhaul adaptive protocol Routing identity (default BAP Routing ID configuration).

For example, the source host may send a handover request to the target host to request handover of the migration node to the target host, and the target host, upon receiving the handover request, may send a handover response to the source host in response to the handover request. The switching response at least carries the IAB node, the descendant node thereof and the RRC reconfiguration message of the UE, so that a source host receives the IAB node, the descendant node thereof and the RRC reconfiguration message of the UE, sends the RRC reconfiguration message of the IAB node and the descendant node thereof to the corresponding IAB node and sends the RRC reconfiguration message of the UE to the UE, and each IAB node and each UE are respectively reconfigured.

As a first possible implementation manner, the IAB node may receive a first RRC reconfiguration message sent by the source host, where the first RRC reconfiguration message is carried in a handover response sent by the target host to the source host.

That is to say, the source host may send a handover request to the target host, and the target host receives and responds to the handover request and sends a handover response to the source host, where the handover response carries the first RRC reconfiguration message, and the source host may receive the first RRC reconfiguration message sent by the target host, so that the source host sends the received first RRC reconfiguration message to the IAB node, and the IAB node receives the first RRC reconfiguration message sent by the source host.

As a second possible implementation manner, the IAB node may receive a first RRC reconfiguration message sent by a parent node of the IAB node, where the first RRC reconfiguration message is sent by the target host to the parent node through a default channel and a default route with the parent node.

Wherein, the parent node of the IAB node may be the top level migration node switched to the target host. And the source host acquires a third RRC reconfiguration message from the switching response after receiving the switching response, and further sends the third RRC reconfiguration message to the parent node.

That is to say, the source host may send the handover request to the target host, and the target host receives the handover request and responds to the handover request, where the handover response carries a third reconfiguration message, and may send the third reconfiguration message to the source host, and based on a default channel and a default route between the target host carried in the source host and the parent node of the IAB, the target host may send the first RRC reconfiguration message to the parent node of the IAB, so that the parent node of the IAB sends the received first RRC reconfiguration message to the IAB node, and the IAB node receives the first RRC reconfiguration message sent by the parent node of the IAB.

Further, after receiving the first RRC reconfiguration message sent by the parent node, the IAB node may receive a fourth RRC reconfiguration message sent by the target host through a default channel and a default route with the IAB node; the fourth RRC reconfiguration message carries a default channel and a default route between a next-hop communication node of the IAB node and the target host, where the next-hop communication node is a UE or a child IAB node of the IAB node, and then sends the fourth RRC reconfiguration message to the next-hop communication node.

That is, after receiving the first RRC reconfiguration message sent by the parent node of the IAB, the IAB node may learn the default channel and default route with the target host. And further, based on a default channel and a default route between the IAB node and the target host, a fourth RRC reconfiguration message sent by the target host may be received, and the fourth RRC reconfiguration message is sent to the next-hop communication node.

And 42, reconfiguring the IAB node according to the configuration parameters of the IAB node.

In the embodiment of the present application, after receiving the first RRC reconfiguration message, the IAB node may reconfigure the IAB node according to the configuration parameters of the IAB node carried in the first RRC reconfiguration message. The reconfiguration is mainly performed on the MT part of the IAB node, that is, the MT part of the IAB node is reconfigured by using the configuration parameters carried in the first RRC reconfiguration message.

And step 43, under the condition that the IAB node is reconfigured, sending a first RRC reconfiguration complete message to the target host by adopting a default channel and a default route.

For example, when the reconfiguration of the IAB node is completed, the IAB node may send a first RRC reconfiguration complete message to the target host by using a default BH RLC channel and a default BAP (bandwidth allocation protocol) route.

Further, after sending the first RRC reconfiguration complete message to the target host using the default channel and the default route, an F1 connection establishment request message may be sent to the target host using the default channel and the default route, where the F1 connection establishment request is used to request to establish an F1 connection between the IAB node and the target host, so as to receive an F1 connection establishment response message sent by the target host using the default channel and the default route.

The embodiment of the application provides a control signaling transmission method, which comprises the steps of receiving a first RRC reconfiguration message; the first RRC reconfiguration message carries configuration parameters of the IAB node, and information of a default channel and a default route between the target host and the IAB node, then the IAB node is reconfigured according to the configuration parameters of the IAB node, and the first RRC reconfiguration completion message is sent to the target host by adopting the default channel and the default route under the condition that the reconfiguration of the IAB node is completed. Therefore, in the process of switching the IAB node from the source host to the target host, the reconfiguration completion message can be sent through the default channel and the default route, and the completion of the migration of the upper-layer IAB node can be avoided, so that the time delay of message sending is reduced, and the technical problem that the time delay of message sending is larger because the IAB node can send the RRC reconfiguration completion message only when waiting for the completion of the migration of the upper-layer IAB node is solved.

To clearly illustrate the process of transmitting the RRC reconfiguration complete message of the UE to the target host after the UE reconfiguration is completed, fig. 5 is a flowchart of a method for controlling signaling transmission according to an embodiment of the present application. The control signaling transmission method is applied to an IAB node, and the IAB node is a parent node of the UE.

As shown in fig. 5, the method includes:

step 51, receiving a first RRC reconfiguration message; the first RRC reconfiguration message carries configuration parameters of the IAB node, and information of a default channel and a default route between the target host and the IAB node.

As a possible implementation manner, the IAB node may receive, through an F1 connection with the source host, a first RRC reconfiguration message sent by the source host, where the first RRC reconfiguration message is carried in a handover response sent by the target host to the source host.

And step 52, receiving a second RRC reconfiguration message through the F1 connection between the source host and the destination host.

And the second RRC reconfiguration message carries configuration parameters for reconfiguring the UE.

It should be noted that, the execution sequence of step 51 and step 52 may be that step 51 precedes step 52, or step 52 precedes step 51, or step 51 and step 52 may be executed synchronously. In this embodiment, the execution sequence of step 51 and step 52 is not limited.

And step 53, sending a second RRC reconfiguration message to the UE through a Uu interface between the IAB node and the UE.

For example, the IAB node as the UE parent node may receive the second RRC reconfiguration message, may parse the second RRC reconfiguration message, and when it is identified that the configuration parameter is a configuration parameter for reconfiguring the UE, based on the Uu interface between the UE parent node and the UE, the UE parent node may send the second RRC reconfiguration message to the UE.

And step 54, receiving a second RRC reconfiguration complete message sent when the UE reconfiguration is completed.

In the embodiment of the present application, the UE receives the second RRC reconfiguration message, performs reconfiguration, and after the UE completes reconfiguration, may send a second RRC reconfiguration complete message to the IAB node serving as the parent node of the UE, so that the parent node of the UE may receive the second RRC reconfiguration complete message sent when the UE completes reconfiguration.

And step 55, sending a second RRC reconfiguration complete message to the target host by adopting a default channel and a default route between the target host and the IAB node.

In an embodiment of the present application, an IAB node, which is a parent node of the UE, receives a second RRC reconfiguration complete message sent when the UE reconfiguration is completed, and if the IAB node is not reconfigured, temporarily stores the second RRC reconfiguration complete message until the IAB node is reconfigured, and sends the second RRC reconfiguration complete message to the target host based on a default channel and a default route between the IAB node and the target host.

The embodiment of the application provides a control signaling transmission method, an IAB node can receive a first RRC reconfiguration message by adopting a default channel and a default route, UE can be reconfigured firstly, then the IAB node is reconfigured, and then the UE and the IAB node can independently send a first RRC reconfiguration completion message to a target host through the default channel and the default route, the sending processes are not mutually influenced, and the IAB does not need to send the first RRC reconfiguration completion message after the UE finishes sending, so that the time delay of message sending is reduced.

Fig. 6 is a flowchart illustrating a control signaling transmission method according to an embodiment of the present application, where the control signaling transmission method is applied to a target host.

As shown in fig. 6, the method includes:

and step 61, sending a first RRC reconfiguration message of the first IAB node, wherein the first IAB node is to be switched from the source host to the target host, and the first RRC reconfiguration message carries configuration parameters for reconfiguring the first IAB node, and information of a default channel and a default route between the target host and the first IAB node.

In the embodiment of the application, the target host sends a handover response to the source host, where the handover response carries a first RRC reconfiguration message, which is used to instruct the source host to send the first RRC reconfiguration message to the first IAB node.

Specifically, the source host may send a handover request to the target host, and the target host may send a handover response to the source host after receiving the handover request, where the handover response carries a first RRC reconfiguration message, which is used to instruct the source host to send the first RRC reconfiguration message to the first IAB node. And the source host sends a first RRC reconfiguration message to the first IAB node, and the first IAB node realizes the first RRC reconfiguration based on the configuration parameters carried in the first RRC reconfiguration message after receiving the first RRC reconfiguration message.

Optionally, when the target host sends a handover response to the source host, the handover response further carries a second RRC reconfiguration message of the UE, where the second RRC reconfiguration message carries configuration parameters for reconfiguring the UE. Specifically, after the handover response is sent to the source host, a channel and a route between the target host and the first IAB node serving as the parent node of the UE may be used to receive a second RRC reconfiguration complete message sent by the parent node, where the second RRC reconfiguration complete message is used to represent that the UE is reconfigured completely.

That is to say, the target host sends a handover response to the source host, and the source host may send a second RRC reconfiguration message to the first IAB node after receiving the handover response, and the first IAB node may send the second RRC reconfiguration message to the UE parent node based on the F1 signaling connection between the first IAB node and the UE parent node, so that the UE parent node receives the second RRC reconfiguration message and sends the second RRC reconfiguration message to the UE through the Uu interface, so that the UE receives the second RRC reconfiguration message and performs UE configuration.

Further, after the UE reconfiguration is completed, a second RRC reconfiguration complete message may be sent to the UE parent node, so that the UE parent node receives the second RRC reconfiguration complete message, and sends the second reconfiguration complete message to the first IAB node serving as the UE parent node. Wherein the second reconfiguration complete message is used for representing that the UE is reconfigured completely.

The first IAB node as the UE parent node receives the second reconfiguration complete message sent by the UE, and may send the second reconfiguration complete message to the target host by using a default channel and a default route between the target host and the first IAB node as the UE parent node, so that the target host receives the second RRC reconfiguration complete message sent by the parent node.

As a second possible implementation manner, the sending of the first RRC reconfiguration message of the first IAB node may be implemented by the parent node of the first IAB sending the first RRC reconfiguration message to the first IAB node. Specifically, a default channel and a default route between the target host and the second IAB node may be adopted, and the target host may send the first RRC reconfiguration message to the second IAB node to send the first RRC reconfiguration message to the first IAB node through the second IAB node, where the second IAB node is a parent node of the first IAB node.

In an embodiment of the present application, a default channel and a default route between a target host and a second IAB node are used, and before sending a first RRC reconfiguration message to the second IAB node, a third RRC reconfiguration message is sent to the second IAB node through a source host, where the third RRC reconfiguration message carries the default channel and the default route between the target host and the second IAB node.

That is to say, after the first IAB node configuration is completed, the source host may first send a third RRC reconfiguration message to the parent node of the first IAB, where the third RRC reconfiguration message carries a default channel and a default route between the target host and the parent node of the first IAB, and then the target host sends the first RRC reconfiguration message to the parent node of the first IAB based on the default channel and the default route between the target host and the parent node of the first IAB, thereby enabling the parent node of the first IAB to send the first RRC reconfiguration message to the first IAB node.

Step 62, receiving a first RRC reconfiguration complete message of the first IAB node by using a default channel and a default route between the target host and the first IAB node.

That is, the first IAB node completes the first RRC reconfiguration complete message, and based on a default channel and a default route between the target host and the first IAB node, the first IAB node may send the first RRC reconfiguration complete message of the first IAB node to the target host, and then the target host receives the first RRC reconfiguration complete message of the first IAB node.

In an embodiment of the present application, after receiving a first RRC reconfiguration complete message of a first IAB node by using a default channel and a default route between a target host and the first IAB node, an F1 connection establishment request message sent by the first IAB node by using the default channel and the default route may be received, and an F1 connection between the first IAB node and the target host is established; and sending an F1 connection establishment response message to the first IAB node by adopting a default channel and a default route.

That is, after the target host receives the first RRC reconfiguration complete message of the first IAB node, based on the default channel and the default route between the target host and the first IAB node, the first IAB node may send an F1 connection establishment request message to the target host to request establishment of an F1 connection between the first IAB node and the target host, and the target host sends an F1 connection establishment response message to the first IAB node using the default channel and the default route.

The embodiment of the application provides a control signaling transmission method, a target host may send a first RRC reconfiguration message of a first access backhaul integrated IAB node, where the first RRC reconfiguration message carries configuration parameters for reconfiguring the first IAB node and information of a default channel and a default route between the target host and the first IAB node, and then the target host may receive a first RRC reconfiguration complete message of the first IAB node by using the default channel and the default route between the target host and the first IAB node. Therefore, in the process of switching the IAB node from the source host to the target host, the target host can receive the reconfiguration message through the default channel and the default route, so that the reconfiguration message is sent to the source host through the default channel and the default route, and the reconfiguration receiving and sending of the upper layer IAB node are not required to be waited, thereby reducing the time delay of the message receiving and sending, and avoiding the technical problem that the RRC reconfiguration message can be received or sent only when the IAB node waits for the reconfiguration receiving or sending of the upper layer IAB node to be completed, so that the time delay of the message receiving is larger.

Fig. 7 is a flowchart illustrating a control signaling transmission method according to an embodiment of the present application, where the control signaling transmission method is applied to a source host.

As shown in fig. 7, the method includes:

step 71, obtaining a first RRC reconfiguration message sent by the target host, where the first RRC reconfiguration message carries configuration parameters for reconfiguring the first IAB node, and information of a default channel and a default route between the target host and the first IAB node; the first IAB node is to be handed off from the source host to the target host.

In the embodiment of the present application, a handover request may be sent to a target host, and a handover response sent by the target host is received, where the handover response carries a first RRC reconfiguration message.

That is to say, the source host may send a handover request to the target host, and the target host may send a handover response to the source host when receiving the handover request, so that the source host receives the handover response sent by the target host, where the handover response carries the first RRC reconfiguration message.

Optionally, the handover response further carries a second RRC reconfiguration message of the UE, where the second RRC reconfiguration message carries configuration parameters for reconfiguring the UE. After receiving the handover response of the target host, the source host may send a second RRC reconfiguration message to the UE parent node based on the F1 connection between the source host and the UE parent node; and the second RRC reconfiguration message is used to instruct the UE to reconfigure and send a second RRC reconfiguration complete message to the parent node of the UE when the configuration is completed, so that the parent node of the UE sends the second RRC reconfiguration complete message to the target host by using a default channel and a default route between the parent node of the UE and the target host.

For example, upon receiving the handover response, the source host may send a second RRC reconfiguration message to the parent node of the UE based on the F1 connection between the source host and the parent node of the UE, so that the parent node of the UE receives the second RRC reconfiguration message, and send the second RRC reconfiguration message to the UE through the Uu interface, so that the UE receives the second RRC reconfiguration message and performs UE reconfiguration.

The UE may send the second RRC reconfiguration complete message to the UE parent node when the configuration is completed, so that the UE parent node receives the second RRC reconfiguration complete message, and based on a default channel and a default route between the UE parent node and the target host, the UE parent node may send the second RRC reconfiguration complete message to the target host.

Step 72, sending a first RRC reconfiguration message to the first IAB node; the first RRC reconfiguration message is used to instruct the first IAB node to perform reconfiguration according to the configuration parameters, and send a first RRC reconfiguration complete message to the target host by using a default channel and a default route between the target host and the first IAB node.

In the embodiment of the present application, after the source host acquires the configuration parameter, the source host may send a first RRC reconfiguration message to the first IAB node, so that the first IAB node performs reconfiguration according to the configuration parameter, and after the configuration of the first IAB node is completed, based on a connection between a default channel and a default route between the first IAB node and the target host, the first IAB node may send the first RRC reconfiguration complete message to the target host.

In an embodiment of the present application, there are a plurality of first IAB nodes, and the first RRC reconfiguration message is sent to each first IAB node in parallel; or, the first RRC reconfiguration message is sent to each of the first IAB nodes according to a set order.

The embodiment of the application provides a control signaling transmission method, wherein a source host can acquire a first RRC reconfiguration message sent by a target host, wherein the first RRC reconfiguration message carries configuration parameters for reconfiguring a first IAB node, and information of a default channel and a default route between the target host and the first IAB node; sending a first RRC reconfiguration message to a first IAB node; the first RRC reconfiguration message is used to instruct the first IAB node to perform reconfiguration according to the configuration parameters, and send a first RRC reconfiguration complete message to the target host by using a default channel and a default route between the target host and the first IAB node. Therefore, in the process of switching the IAB node from the source host to the target host, the source host can receive the reconfiguration message through the default channel and the default route, so that the reconfiguration completion message is sent to the target host through the default channel and the default route, and the reconfiguration receiving and sending of the upper layer IAB node are not required to be waited, thereby reducing the time delay of the message receiving and sending, and avoiding the technical problem that the RRC reconfiguration message can be received and sent only when the IAB node waits for the reconfiguration receiving and sending of the upper layer IAB node to be completed, so that the time delay of the message receiving is larger.

In order to make it easier for those skilled in the art to understand the present application, fig. 8 is a flowchart illustrating a control signaling transmission method provided in an embodiment of the present application. It should be noted that, the IAB node can be switched from the source host to the target host by means of migration from the bottom layer to the top layer. In the embodiment of the present application, the source host is the IAB host CU1 in fig. 8, the target host is the IAB host CU2 in fig. 8, the IAB node 5 is a parent node of the IAB node 6, and the IAB node 6 is a child node of the IAB node 5. IAB node 6 is the parent node of IAB node 7 and IAB node 7 is the child node of IAB node 6. IAB node 3 is the access node for the source path and IAB node 4 is the access node for the target path.

As shown in fig. 8, the method includes:

step 81, the IAB host 1 initiates a handover request to request handover of the migration node and the descendant nodes and UE therebelow to the IAB host 2.

The switching request carries one or more of context information of the requested IAB node and the descendant node thereof, context information of all the UEs below the IAB node and the UEs below the descendant node thereof, and topology information between the IAB node and the descendant node thereof.

In step 82, the IAB host 2 may send the response request to the IAB host 1 in response to the request, where the response request includes an RRC reconfiguration message for the migrating node, its descendant nodes, and the UE.

Step 83, the IAB host 1 signals a DL RRC transfer message through the F1 interface, sends an RRC reconfiguration message to the IAB node 7 of the upper node of the UE, then unpacks the IAB node 7, and transmits the RRC reconfiguration message to the UE through the Uu interface after recognizing that the RRC reconfiguration message is for the UE.

Step 84, after the UE completes the reconfiguration, replying an RRC reconfiguration complete message to the parent node IAB node 7, but at this time, the IAB node 6 and the IAB node 5 have not been migrated, and a default route and a default channel have not been configured yet, so the IAB node 7 cannot transmit the RRC reconfiguration complete message of the UE to the IAB host 2.

It should be noted that, for the descendant node and the UE, since their connection to the parent node is unchanged, the random access procedure may not be performed.

Step 85, the IAB node 7 is reconfigured, and the RRC reconfiguration message also carries the default BH RLC channel and default BAP route of the IAB node 7.

In step 86, the IAB node 7 may transmit the RRC reconfiguration complete message of the IAB node 7 and the RRC reconfiguration complete message of the UE to the IAB donor CU2 through the default BH RLC channel and the default BAP route.

In step 87, after the IAB node 7 completes the reconfiguration, the IAB node 7 may send an F1 setup request to the IAB host 2 through the default BH RLC channel and the default BAP route.

In step 88, the IAB host 2 may respond to the F1 setup request sent by the IAB node 7 and may send an F1 setup complete to the IAB node 7 over the default BH RLC channel and default BAP route.

Step 89 reconfigures the IAB node 6. The IAB donor CU1 may send an RRC reconfiguration message to the upper-level IAB node 5 of the IAB node 6 through the default BH RLC channel and the default BAP route, and the IAB node 5 may receive the RRC reconfiguration message, may parse the RRC reconfiguration message, and may send the RRC reconfiguration message to the IAB node 6 after recognizing that the RRC reconfiguration message is for the IAB node 6, so that the IAB node 6 may reconfigure.

In step 810, after the completion of the reconfiguration of the IAB node 6, the RRC reconfiguration complete message for transmitting the IAB node 6 may be sent to the IAB donor CU2 through the default BH RLC channel and the default BAP route.

In step 811, after the IAB node 7 completes the reconfiguration, the IAB node 7 may send an F1 setup request to the IAB host 2 through the default BH RLC channel and the default BAP route.

In step 812, the IAB host 2 may respond to the F1 setup request sent by the IAB node 7 and may send an F1 setup complete to the IAB node 7 over the default BH RLC channel and default BAP route.

Step 813, the migration node IAB node 5 is reconfigured.

Step 814, the access node IAB node 4 of the random access target path of the IAB node 5 after the reconfiguration

At step 815, IAB node 5 sends an RRC reconfiguration complete message to IAB node 4.

In step 816, IAB node 4 may send an RRC reconfiguration complete message carrying IAB node 5 to IAB host 2 via uplink transmission.

Step 817, F1 setup procedure of IAB node 5.

Step 818, F1 setup procedure for IAB node 5.

It should be noted that, in the embodiment of the present application, for the IAB node 7, if the default BH RLC channel and the default BAP route are not used, it is necessary to wait until the IAB node 5 and the IAB node 6 are migrated, and then the RRC reconfiguration complete message is sent and the F1 connection establishment procedure is performed. After the default BH RLC channel and the default BAP route are used, the time delay of the IAB node 7 is reduced, and the IAB node 5 and the IAB node 6 do not need to work until the migration is finished. Similarly, it is not necessary for the IAB node 6 to wait for the IAB node 5 to migrate. But for the UE to wait until all of the

IAB nodes

7, 6, and 5 have migrated.

Based on the foregoing embodiments, in order to further reduce the delay, in the embodiments of the present application, as shown in fig. 9, RRC reconfiguration may be performed on all the descendant nodes and the UE first, then RRC reconfiguration complete messages of the descendant nodes may be performed at the same time, and an F1 connection establishment procedure of the descendant nodes may also be performed at the same time. Fig. 9 is a flowchart illustrating a control signaling transmission method according to an embodiment of the present application.

As shown in fig. 9, the method includes:

step 91, the IAB host 1 initiates a handover request to request the migration node and the following descendant nodes and UE

Switch to IAB host 2.

In step 92, the IAB host 2 may send the response request to the IAB host 1 in response to the request, where the response request includes an RRC reconfiguration message for the migrating node, its descendant nodes, and the UE.

Step 93, the IAB host 1 sends the RRC reconfiguration message to the IAB node 7 of the upper node of the UE through the DL RRC transfer message of the F1 interface signaling, then the IAB node 7 unpacks the RRC reconfiguration message, and after recognizing that the RRC reconfiguration message is for the UE, transmits the RRC reconfiguration message to the UE through the Uu interface.

Step 94, the IAB host 1 sends the RRC reconfiguration message to the IAB node 6 of the upper node of the IAB node 7, then the IAB node 6 unpacks the RRC reconfiguration message, and after recognizing that the RRC reconfiguration message is for the IAB node 7, transmits the RRC reconfiguration message to the IAB node 7 through the Uu port.

Step 95, the IAB host 1 sends the RRC reconfiguration message to the IAB node 5DU, which is the upper node of the IAB node 6, and then the IAB node 5 unpacks the RRC reconfiguration message, and after recognizing that the RRC reconfiguration message is for the IAB node 6, transmits the RRC reconfiguration message to the IAB node 6 through the Uu port.

Step 96, the IAB host 1 sends the RRC reconfiguration message to the IAB node 3DU, which is the upper-level node of the IAB node 5, and then the IAB node 3 unpacks the RRC reconfiguration message, and after recognizing that the RRC reconfiguration message is for the IAB node 5, transmits the RRC reconfiguration message to the IAB node 5 through the Uu port.

At step 97, the IAB node 5 may send the RRC reconfiguration message to the IAB host 1 for storage.

Step 98, the UE and the IAB node 7 send the RRC reconfiguration complete message of the UE and the IAB node 7 to the IAB host 2 through the default BH RLC channel and the default BAP route.

In step 99, the IAB node 6DU sends the RRC reconfiguration complete message of the IAB node 6 to the IAB host 2 through the default BH RLC channel and the default BAP route.

In step 910, the IAB node 5 sends the RRC reconfiguration complete message of the IAB node 5 to the IAB host 2 through the default BH RLC channel and the default BAP route.

It should be noted that the UE, the IAB node 7, the IAB node 6, and the IAB node 5 may simultaneously send the self-configuration completion message to the IAB host 2, so as to reduce the time delay and save the time.

In step 911, the IAB node 5 may establish an F1 connection with the IAB host 2 through a default BH RLC channel and default BAP routing.

In step 912, IAB node 6 may establish an F1 connection with IAB host 2 via a default BH RLC channel and default BAP route.

In step 913, the IAB node 7 may establish an F1 connection with the IAB host 2 via the default BH RLC channel and default BAP route.

It should be noted that, the IAB node 5, the IAB node 6, and the IAB node 7 may establish the F1 connection with the IAB host 2 through the default BH RLC channel and the default BAP route at the same time, so as to reduce the problem of delay.

In order to make it easier for those skilled in the art to understand the present application, fig. 10 is a flowchart illustrating a control signaling transmission method provided in an embodiment of the present application. It should be noted that, the IAB node can be switched from the source host to the target host by a migration manner from the top IAB node to the bottom UE. Wherein the F1 connection establishment is also from the top layer to the bottom layer. In the embodiment of the present application, the source host is an IAB host 1 in fig. 10, the target CU is an IAB host 2 in fig. 10, the IAB node 5 is a parent node of the IAB node 6, and the IAB node 6 is a child node of the IAB node 5. IAB node 6 is the parent node of IAB node 7 and IAB node 7 is the child node of IAB node 6. IAB node 3 is the access node for the source path and IAB node 4 is the access node for the target path.

As shown in fig. 10, the method includes:

step 101, the IAB host 1 initiates a handover request to request the migration node and the following descendant nodes and UE

Switch to IAB host 2.

In step 102, the IAB host 2 may send the response request to the IAB host 1 in response to the request, where the response request includes an RRC reconfiguration message for the migrating node, its descendant nodes, and the UE.

Step 103, the IAB host 1 sends the RRC reconfiguration message to the IAB node 3 of the upper node of the IAB node 5, and then the IAB node 3 unpacks the RRC reconfiguration message, and when the IAB node 3 recognizes that the RRC reconfiguration message is for the IAB node 5, the IAB node 5 may transmit the RRC reconfiguration message to the IAB node 5, and then the IAB node 5 receives the RRC reconfiguration message and performs reconfiguration.

IAB node 5 may send a reconfiguration complete message to IAB node 4 for storage, step 104.

At step 105, the IAB node 4 may send a stored reconfiguration complete message to the IAB host 2.

Step 106, the IAB host 2 sends the RRC reconfiguration message to the IAB node 5 of the upper node of the IAB node 6 through the default BH RLC channel and the default BAP route, and the IAB node 5, upon receiving the RRC reconfiguration message, may identify the RRC reconfiguration message, and after identifying that the RRC reconfiguration message is for the IAB node 6, may send the RRC reconfiguration message to the IAB node 6.

Step 107, after the IAB node 6 completes the reconfiguration, it can send the reconfiguration complete information to the IAB host 2 through the default BH RLC channel and default BAP route.

At step 108, IAB node 5 may send an F1 setup connection request to IAB host 2.

IAB host 2 may respond to the request to establish a connection with IAB node 5F1 and send to IAB node 5, step 109.

Step 1010, the IAB host 2 sends the RRC reconfiguration message to the upper-level node IAB node 6 of the IAB node 7 through the default BH RLC channel and the default BAP route, and the IAB node 6, upon receiving the RRC reconfiguration message, may identify the RRC reconfiguration message, and after identifying that the RRC reconfiguration message is for the IAB node 7, may send the RRC reconfiguration message to the IAB node 7.

In step 1011, after the completion of the reconfiguration of the IAB node 7, the default BH RLC channel and the default BAP route may send the reconfiguration complete information to the IAB host 2.

At step 1012, IAB node 6 may send an F1 setup connection request to IAB host 2.

At step 1013, the IAB host 2 may respond to the request to establish a connection with F1 of IAB node 6 and send it to IAB node 6.

In step 1014, the IAB host 2 sends the RRC reconfiguration message to the upper-level node IAB node 7 of the UE through the default BH RLC channel and the default BAP route, and the IAB node 7 receives the RRC reconfiguration message, can identify the RRC reconfiguration message, and can send the RRC reconfiguration message to the UE after identifying that the RRC reconfiguration message is for the UE.

Step 1015, after the UE completes the reconfiguration, it can send the reconfiguration complete information to the IAB host 2 through the default BH RLC channel and the default BAP route.

At step 1016, IAB node 7 may send an F1 setup connection request to IAB host 2.

At step 1017, the IAB host 2 may respond to the request to establish a connection with F1 of IAB node 7 and send it to IAB node 7.

In the above embodiment, the RRC reconfiguration complete message of the IAB node 6 needs to be transmitted after the IAB host 2 establishes the connection request with F1, which is specifically that the RRC reconfiguration complete message of the IAB node 6 is sent to the IAB node 4, and then the IAB node 4 transmits the RRC reconfiguration complete message to the IAB host 2 through UL.

In the above embodiment, the IAB node 6 sends the reconfiguration complete information to the IAB host 2, and the IAB node 5 may first send the reconfiguration complete information to the IAB host 2 through the default BH RLC channel and the default BAP route without waiting for the F1 connection to be established between the IAB node 5 and the IAB host 2.

It should be noted that the IAB node 6, the IAB node 7, and the UE may send the reconfiguration complete message to the IAB host 2 at the same time, so as to reduce the time delay and save the time.

It should be noted that, in the above embodiment, after the IAB node 5 is reconfigured, and before the F1 connection of the IAB node 5 is established, the IAB node 6 may also perform reconfiguration, and the IAB host 2 sends an RRC reconfiguration message to the IAB node 6 through default configuration of the IAB node 5. Because IAB node 5 has not completed the F1 connection establishment procedure and has only performed the reconfiguration, the reconfiguration complete message cannot be sent to IAB host 2 via IAB node 4. The RRC reconfiguration complete message may thus be transmitted to CU2 via the default BH RLC channel and default BAP route between IAB node 6DU and IAB host 2, and the configuration information for this default channel is brought to IAB node 6 via the RRC reconfiguration message.

Fig. 11 is a schematic structural diagram of an access backhaul integrated IAB node according to an embodiment of the present application.

As shown in fig. 11, the IAB node includes a transceiver 1100, a processor 1110, and a memory 1120, wherein:

a transceiver 1100 for receiving and transmitting data under the control of the processor 1110.

In fig. 11, among other things, the bus architecture may include any number of interconnected buses and bridges with various circuits being linked together, particularly one or more processors represented by processor 1110 and memory represented by memory 1120. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. Transceiver 1100 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over transmission media including wireless channels, wired channels, fiber optic cables, and the like.

As shown in fig. 11, the IAB node may further include a user interface 1130. for different user devices, the user interface 1130 may also be an interface capable of interfacing with a desired device, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, etc.

The processor 1110 is responsible for managing the bus architecture and general processing, and the memory 1120 may store data used by the processor 1110 in performing operations.

Alternatively, the processor 1110 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a CPLD (Complex Programmable Logic Device), and the processor 1110 may also adopt a multi-core architecture.

Processor 1110, by invoking a memory-stored computer program, performs the following operations:

acquiring information of a default channel and a default route between a target host and the IAB node; wherein the target host is a host to which the IAB node is to be switched;

transmitting control signaling with the target host by adopting the default channel and the default route;

wherein the control signaling comprises at least one of a Radio Resource Control (RRC) reconfiguration message, an RRC reconfiguration complete message, an F1 connection setup request, and an F1 connection setup response message.

Optionally, as another embodiment, the processor 1110 is further configured to:

acquiring information of a default channel and a default route between the target host and the IAB node, wherein the information comprises:

Optionally, as another embodiment, the processor 1110 is further configured to:

the transmitting the control signaling with the target host by adopting the default channel and the default route includes:

Optionally, as another embodiment, the processor 1110 is further configured to:

after the sending the first RRC reconfiguration complete message to the target host by using the default channel and the default route, the method further includes:

Optionally, as another embodiment, the processor 1110 is further configured to: the IAB node is a parent node of the UE, and before receiving the first RRC reconfiguration message, the IAB node further includes:

Optionally, as another embodiment, the processor 1110 is further configured to: the receiving the first RRC reconfiguration message includes:

Optionally, as another embodiment, the processor 1110 is further configured to: after receiving the first RRC reconfiguration message, the method further includes:

It should be noted that, the IAB node provided in the embodiment of the present invention can implement all the method steps implemented by the foregoing method embodiment, and can achieve the same technical effect, and details of the same parts and beneficial effects as those of the method embodiment in this embodiment are not described herein again.

Fig. 12 is a schematic structural diagram of a target host according to an embodiment of the present application. As shown in fig. 12, the target host may include a transceiver 1200, a processor 1210, and a memory 1220, wherein:

a transceiver 1200 for receiving and transmitting data under the control of the processor 1210.

Wherein in fig. 12, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1210, and various circuits, represented by memory 1220, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1200 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium including wireless channels, wired channels, fiber optic cables, and the like. The processor 1210 is responsible for managing the bus architecture and general processing, and the memory 1220 may store data used by the processor 1210 in performing operations.

The processor 1210 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD), and may also have a multi-core architecture.

The processor 1210, by calling the memory stored computer program, performs the following operations:

sending information of a default channel and a default route between the target host and the first access backhaul integrated IAB node; wherein the first IAB node is to be switched from a source host to the target host;

transmitting a control signaling with the first IAB node by adopting the default channel and the default route;

Optionally, as another embodiment, the processor 1210 is further configured to:

the sending information of the default channel and the default route between the target host and the first IAB node includes:

Optionally, as another embodiment, the processor 1210 is further configured to: the transmitting control signaling with the first IAB node by using the default channel and the default route includes:

Optionally, as another embodiment, the processor 1210 is further configured to: the handover response also carries a second RRC reconfiguration message of the terminal UE, where the second RRC reconfiguration message carries configuration parameters for reconfiguring the UE;

Optionally, as another embodiment, the processor 1210 is further configured to: the sending information of the default channel and the default route between the target host and the first access backhaul integrated IAB node includes:

Optionally, as another embodiment, the processor 1210 is further configured to: before the sending the first RRC reconfiguration message to the second IAB node by using the default channel and the default route between the target host and the second IAB node, the method further includes:

It should be noted that, the target host provided in the embodiment of the present invention can implement all the method steps implemented by the method embodiment and achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are not repeated herein.

Fig. 13 is a schematic structural diagram of a source and host provided in an embodiment of the present application. As shown in fig. 13, the second terminal may include a transceiver 1300, a processor 1310, and a memory 1320, wherein:

a transceiver 1300 for receiving and transmitting data under the control of the processor 1310.

In fig. 13, among other things, the bus architecture may include any number of interconnected buses and bridges with various circuits being linked together, particularly one or more processors represented by processor 1310 and memory represented by memory 1320. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1300 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium including wireless channels, wired channels, fiber optic cables, and the like. The processor 1310 is responsible for managing the bus architecture and general processing, and the memory 1320 may store data used by the processor 1310 in performing operations.

The processor 1310 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD), and may also be a multi-core architecture.

The processor 1310, by invoking the memory stored computer program, performs the following operations:

acquiring a first RRC reconfiguration message sent by a target host, wherein the first RRC reconfiguration message carries configuration parameters for reconfiguring a first IAB node, and information of a default channel and a default route between the target host and the first IAB node; the first IAB node is to be switched to the target host from a source host;

sending the first RRC reconfiguration message to the first IAB node; the first RRC reconfiguration message is configured to instruct the first IAB node to perform reconfiguration according to the configuration parameter, and send a first RRC reconfiguration complete message to the target host by using a default channel and a default route between the target host and the first IAB node.

Optionally, as another embodiment, the processor 1310 is further configured to: the acquiring the first RRC reconfiguration message sent by the target host includes:

sending a handover request to the target host;

Optionally, as another embodiment, the processor 1310 is further configured to: the switching request also carries a second RRC reconfiguration message of the terminal UE, wherein the second RRC reconfiguration message carries configuration parameters for reconfiguring the UE;

It should be noted that, the source host provided in the embodiment of the present invention can implement all the method steps implemented by the method embodiment and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are omitted here.

Fig. 14 is a schematic structural diagram of a control signaling transmission apparatus according to an embodiment of the present application.

As shown in fig. 14, the control signaling transmission apparatus is applied to an access backhaul integrated IAB node, and the apparatus 140 includes:

an obtaining information unit 1401, configured to obtain information of a default channel and a default route between a target host and the IAB node; wherein the target host is a host to which the IAB node is to be switched;

a first transmission instruction unit 1402, configured to transmit control signaling with the target host by using the default channel and the default route;

Further, on the basis of the foregoing embodiment, the obtaining information unit 1401 is specifically configured to: receiving a first RRC reconfiguration message; wherein the first RRC reconfiguration message carries information of a default channel and a default route between the target host and the IAB node.

Further, on the basis of the above embodiment, the first transmission instruction unit 1402 is specifically configured to: and under the condition that the IAB node is reconfigured completely, sending a first RRC reconfiguration complete message to the target host by adopting the default channel and the default route.

Further, on the basis of the above embodiment, after the first transmission instruction unit 140214, the apparatus further includes:

a fourth sending unit, configured to send an F1 connection establishment request message to the target host by using the default channel and the default route; wherein the F1 connection establishment request is used for requesting to establish an F1 connection between the IAB node and the target host;

a third receiving unit, configured to receive an F1 connection establishment response message sent by the target host by using the default channel and the default route.

Further, the IAB node is a parent node of the UE, and before the obtaining information unit 1401, the apparatus further includes:

a fourth receiving unit, configured to receive a second RRC reconfiguration message through an F1 connection with the source host; the second RRC reconfiguration message carries configuration parameters for reconfiguring the UE; the source host is a host before the IAB node is switched; (ii) a

A fifth sending unit, configured to send the second RRC reconfiguration message to the UE through a Uu interface between the IAB node and the UE;

a fifth receiving unit, configured to receive a second RRC reconfiguration complete message sent when the UE reconfiguration is completed;

after the unit 1401 for acquiring information, the method further includes:

a sixth sending unit, configured to send the second RRC reconfiguration complete message to the target host by using a default channel and the default route between the target host and the IAB node.

Further, the obtain information unit 1401 is specifically configured to:

Further, the obtain information unit 1401 is specifically configured to: and receiving the first RRC reconfiguration message sent by the parent node of the IAB, wherein the first RRC reconfiguration message is sent to the parent node by the target host through a default channel and a default route between the target host and the parent node.

Further, the obtain information unit 1401 is specifically configured to:

the parent node of the IAB is a top layer migration node switched to the target host; and the default channel and the default route between the target host and the parent node are carried in a third RRC reconfiguration message sent by the source host, and the third reconfiguration message is carried in a handover response sent by the target host to the source host.

Further, on the basis of the above embodiment, after the obtaining information unit 1401, the apparatus further includes:

a sixth receiving unit, configured to receive a fourth RRC reconfiguration message sent by the target host through a default channel and a default route with the IAB node; wherein, the fourth RRC reconfiguration message carries a default channel and a default route between a next-hop communication node of the IAB node and the target host, and the next-hop communication node is a UE or a child IAB node of the IAB node;

a seventh sending unit, configured to send the fourth RRC reconfiguration message to the next-hop communication node.

Further, on the basis of the above embodiment, the default channel is a default backhaul radio link control channel, and the default route is a default backhaul adaptation protocol route identifier.

The method and the device are based on the same application concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.

Fig. 15 is a schematic structural diagram of a control signaling transmission apparatus according to an embodiment of the present application.

As shown in fig. 15, the apparatus is applied in a target host, and the apparatus 150 includes:

a sending information unit 1501, configured to send a first RRC reconfiguration message of a first access backhaul integrated IAB node, where the first IAB node is switched from a source host to a target host;

a second transmission instruction unit 1502, configured to transmit a control signaling with the first IAB node using the default channel and the default route; wherein the control signaling comprises at least one of a Radio Resource Control (RRC) reconfiguration message, an RRC reconfiguration complete message, an F1 connection setup request, and an F1 connection setup response message.

Further, the sending information unit 1501 is specifically configured to: sending a handover response to the source host, wherein the handover response carries a first RRC reconfiguration message, which is used to instruct the source host to send the first RRC reconfiguration message to the first IAB node; the first RRC reconfiguration message carries information of a default channel and a default route between the target host and the first IAB node. .

Further, the second transmission instruction unit 1502 is specifically configured to receive a first RRC reconfiguration complete message of the first IAB node by using the default channel and the default route between the target host and the first IAB node.

Further, the handover response also carries a second RRC reconfiguration message of the terminal UE, where the second RRC reconfiguration message carries configuration parameters for reconfiguring the UE;

after the sending information unit 1501, the apparatus further includes:

a seventh receiving unit, configured to receive, by using the default channel and the default route between the target host and the first IAB node serving as the UE parent node, a second RRC reconfiguration complete message sent by the parent node, where the second RRC reconfiguration complete message is used to represent that the UE reconfiguration is complete.

Further, the sending information unit 1501 is specifically configured to: sending the first RRC reconfiguration message to a second IAB node by adopting a default channel and a default route between the target host and the second IAB node so as to send the first RRC reconfiguration message to the first IAB node through the second IAB node; wherein the second IAB node is a parent node of the first IAB node

Further, before sending the information unit 1501, the apparatus further includes:

an eighth sending unit, configured to send a third RRC reconfiguration message to the second IAB node through the source host, where the third RRC reconfiguration message carries a default channel and a default route between the target host and the second IAB node.

Further, after the second transmission instruction unit 1502, the apparatus further includes:

an eighth receiving unit, configured to receive an F1 connection setup request message sent by the first IAB node by using the default channel and the default route;

a connection establishing unit, configured to establish an F1 connection between the first IAB node and the target host;

a ninth sending unit, configured to send an F1 connection setup response message to the first IAB node by using the default channel and the default route.

Further, the default channel is a default backhaul radio link control channel; the default route is a default backhaul adaptation protocol route identification.

As shown in fig. 16, the apparatus is applied in a source host, and the apparatus 160 includes:

a first obtaining unit 1601, configured to obtain a first RRC reconfiguration message sent by a target host, where the first RRC reconfiguration message carries configuration parameters for reconfiguring a first IAB node, and information of a default channel and a default route between the target host and the first IAB node; the first IAB node is switched from a source host to the target host;

a third sending unit 1602, configured to send the first RRC reconfiguration message to the first IAB node; the first RRC reconfiguration message is configured to instruct the first IAB node to perform reconfiguration according to the configuration parameter, and send a first RRC reconfiguration complete message to the target host by using a default channel and a default route between the target host and the first IAB node.

Further, the first obtaining unit 1601 is specifically configured to:

sending a handover request to the target host;

Further, the handover request also carries a second RRC reconfiguration message of the terminal UE, where the second RRC reconfiguration message carries configuration parameters for reconfiguring the UE;

after the first acquiring unit 1601, the apparatus further includes:

a tenth transmitting unit, configured to transmit the second RRC reconfiguration message to a parent node of the UE through an F1 connection with the parent node; and the second RRC reconfiguration message is used to instruct the UE to reconfigure and send a second RRC reconfiguration complete message to the parent node when the configuration is completed, so that the parent node sends the second RRC reconfiguration complete message to the target host by using a default channel and a default route between the parent node and the target host.

Further, there are multiple first IAB nodes, and the third sending unit 1602 is specifically configured to:

It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented as a software functional unit and sold or used as a stand-alone product, may be stored in a processor readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing 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 method of the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

It should be noted that, the apparatus provided in the embodiment of the present invention can implement all the method steps implemented by the method embodiment and achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are omitted here.

On the other hand, an embodiment of the present invention further provides a processor-readable storage medium, where the processor-readable storage medium stores a computer program, and the computer program is configured to enable a processor to execute the control signaling transmission method shown in the embodiments of fig. 3 to 11 in this application.

The processor-readable storage medium may be any available medium or data storage device that can be accessed by a processor, including but not limited to magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, nonvolatile memory (NAND FLASH), Solid State Disks (SSDs)), etc.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or 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 (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A control signaling transmission method is applied to an access backhaul integrated IAB node, and comprises the following steps:

2. The method of claim 1, wherein the obtaining information of a default channel and a default route between the target host and the IAB node comprises:

3. The method for transmitting control signaling according to claim 1, wherein the transmitting control signaling with the target host using the default channel and the default route includes:

4. The method of claim 3, wherein after sending the first RRC reconfiguration complete message to the target host using the default channel and the default route, the method further comprises:

5. The control signaling transmission method according to claim 2, wherein the IAB node is a parent node of a user equipment UE, and before receiving the first RRC reconfiguration message, the method further comprises:

6. The method according to claim 2, wherein the receiving the first RRC reconfiguration message comprises:

receiving the first RRC reconfiguration message sent by a source host, wherein the first RRC reconfiguration message is carried in a handover response sent by the target host to the source host; the source host is a host before the IAB node is switched; the source host is a host before the IAB node is switched.

7. The method according to claim 2, wherein the receiving the first RRC reconfiguration message comprises:

8. The method according to claim 7, wherein the parent node of the IAB is a top-level migration node that is handed over to the target host; a default channel and a default route between the target host and the parent node are carried in a third RRC reconfiguration message sent by the source host, and the third reconfiguration message is carried in a handover response sent by the target host to the source host; the source host is a host before the IAB node is switched.

9. The control signaling transmission method according to claim 7, wherein after receiving the first RRC reconfiguration message, further comprising:

10. The control signaling transmission method according to any of claims 1-9, characterised in that the default channel is a default backhaul radio link control channel; the default route is a default backhaul adaptation protocol route identification.

11. A control signaling transmission method is applied to a target host, and comprises the following steps:

12. The method of claim 11, wherein the sending information of the default channel and the default route between the target host and the first IAB node comprises:

13. The method of claim 12, wherein the transmitting control signaling with the first IAB node using the default channel and the default route comprises:

14. The transmission method of control signaling according to claim 12, wherein the handover response further carries a second RRC reconfiguration message of the terminal UE, and the second RRC reconfiguration message carries configuration parameters for reconfiguring the UE;

15. The method according to claim 11, wherein the sending information of the default channel and the default route between the target host and the first access backhaul integrated IAB node comprises:

16. The method of claim 15, wherein before sending the first RRC reconfiguration message to the second IAB node using a default channel and a default route between the target host and the second IAB node, the method further comprises:

17. The method of claim 13, wherein after receiving the first RRC reconfiguration complete message for the first IAB node using the default channel and the default route between the target host and the first IAB node, the method further comprises:

establishing an F1 connection between the first IAB node and the target host;

18. The control signaling transmission method according to any of claims 11-17, characterised in that the default channel is a default backhaul radio link control channel; the default route is a default backhaul adaptation protocol route identification.

19. A control signaling transmission method, applied to a source host, the method comprising:

20. The method of claim 19, wherein the obtaining the first RRC reconfiguration message sent by the target host comprises:

sending a handover request to the target host;

21. The transmission method of control signaling according to claim 20, wherein the handover request further carries a second RRC reconfiguration message of the terminal UE, and the second RRC reconfiguration message carries configuration parameters for reconfiguring the UE;

22. The method of any one of claims 19-21, wherein the number of the first IAB nodes is multiple, and wherein the sending the first RRC reconfiguration message to the first IAB node comprises:

23. The control signaling transmission method according to any of the claims 19-21, characterised in that the default channel is a default backhaul radio link control channel; the default route is a default backhaul adaptation protocol route identification.

24. An access backhaul integrated IAB node, comprising:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

25. The IAB node of claim 24, wherein the obtaining information of a default channel and a default route between the target host and the IAB node comprises:

26. The IAB node of claim 24, wherein the communicating control signaling with the target host using the default channel and the default route comprises:

27. The IAB node of claim 26, wherein after sending a first RRC reconfiguration complete message to the target host using the default channel and the default route, further comprising:

28. The IAB node of claim 25, wherein the IAB node is a parent node of a user equipment, UE, and wherein prior to receiving the first RRC reconfiguration message, further comprising:

29. The IAB node of claim 25, wherein the receiving the first RRC reconfiguration message comprises:

receiving the first RRC reconfiguration message sent by the source host, wherein the first RRC reconfiguration message is carried in a handover response sent by the target host to the source host; the source host is a host before the IAB node is switched; the source host is a host before the IAB node is switched.

30. The IAB node of claim 25, wherein the receiving the first RRC reconfiguration message comprises:

31. The IAB node of claim 30, wherein after receiving the first RRC reconfiguration message, further comprising:

32. A target host, comprising a memory, a transceiver, a processor:

33. The target host of claim 32, wherein sending information for a default channel and a default route between the target host and the first IAB node comprises:

34. The target host of claim 33, wherein the transmitting control signaling with the first IAB node using the default channel and the default route comprises:

35. The target host according to claim 33, wherein the handover response further carries a second RRC reconfiguration message of the terminal UE, and the second RRC reconfiguration message carries configuration parameters for reconfiguring the UE;

36. The target host of claim 32, wherein sending information of a default channel and a default route between the target host and a first access backhaul integrated IAB node comprises:

37. The target host of claim 36, wherein prior to sending the first RRC reconfiguration message to the second IAB node using a default channel and a default route between the target host and the second IAB node, further comprising:

38. A source host, comprising a memory, a transceiver, a processor:

39. The source host of claim 38, wherein the obtaining the first RRC reconfiguration message sent by the target host comprises:

sending a handover request to the target host;

40. The source-host according to claim 39, wherein the handover request further carries a second RRC reconfiguration message of the terminal UE, and the second RRC reconfiguration message carries configuration parameters for reconfiguring the UE;

41. A control signaling transmission apparatus, wherein the apparatus is applied to an access backhaul integrated IAB node, and the apparatus comprises:

an information acquiring unit, configured to acquire information of a default channel and a default route between a target host and the IAB node; wherein the target host is a host to which the IAB node is to be switched;

a first transmission instruction unit, configured to transmit a control signaling with the target host by using the default channel and the default route;

42. A control signaling transmission apparatus, the apparatus being applied to a target host, the apparatus comprising:

a sending information unit, configured to send information of a default channel and a default route between the target host and the first access backhaul integrated IAB node; wherein the first IAB node is to be switched from a source host to the target host;

a second transmission instruction unit, configured to transmit a control signaling with the first IAB node by using the default channel and the default route;

43. A control signaling transmission apparatus, the apparatus being applied to a source host, the apparatus comprising:

a first obtaining unit, configured to obtain a first RRC reconfiguration message sent by a target host, where the first RRC reconfiguration message carries configuration parameters for reconfiguring a first IAB node, and information of a default channel and a default route between the target host and the first IAB node; the first IAB node is to be switched to the target host from a source host;

a third sending unit, configured to send the first RRC reconfiguration message to the first IAB node; the first RRC reconfiguration message is configured to instruct the first IAB node to perform reconfiguration according to the configuration parameter, and send a first RRC reconfiguration complete message to the target host by using a default channel and a default route between the target host and the first IAB node.

44. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing a processor to perform the method of any of claims 1 to 10, or the method of any of claims 11 to 18, or the method of any of claims 19 to 23.