CN114390602A

CN114390602A - Connection establishing method, device, equipment and storage medium

Info

Publication number: CN114390602A
Application number: CN202011110955.4A
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: CN114390602B; WO2022078112A1

Abstract

The application discloses a connection establishing method, a device, equipment and a storage medium, and relates to the technical field of communication. The specific implementation scheme is as follows: sending an F1 connection establishment request to a target host, wherein the F1 connection establishment request is used for requesting to establish an F1 connection between the IAB node and the target host; the target host is a host to which the IAB node is to be switched; receiving an F1 connection establishment response message sent by the target host; and sending indication information to the child node of the IAB node, wherein the indication information is used for triggering the F1 connection establishment or migration of the child node of the IAB node. Therefore, after the F1 connection is successfully established, the IAB node can send indication information to the child node to trigger the F1 connection establishment or migration of the child node, so that new F1 connection or migration between the IAB node and the descendant node thereof and a target host is established, and migration between hosts of the IAB node is realized.

Description

Connection establishing method, device, equipment and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a connection establishment method, apparatus, device, and storage medium.

Background

Currently, with the development of an Integrated Access and Backhaul (IAB) technology, the requirement for mobility of an IAB node is higher and higher.

The related art relates to in-home migration of IAB nodes. Inhome migration, which refers to the switching of an IAB node and its descendants from one distributed unit of a home to another, does not involve the switching of the home and does not involve the establishment of a new F1 connection.

When the IAB node needs to be migrated between hosts, the IAB node and its descendant node need to establish a new F1 connection with the target host, however, in the related art, how the IAB node and its descendant node establish a new F1 connection with the target host is not involved.

Disclosure of Invention

The disclosure provides a connection establishment method, a device, equipment and a storage medium.

According to an aspect of the present disclosure, there is provided a connection establishment method, which is applied to an access backhaul integrated IAB node, and the method includes:

sending an F1 connection establishment request to a target host, wherein the F1 connection establishment request is used for requesting to establish an F1 connection between the IAB node and the target host; the target host is a host to which the IAB node is to be switched;

receiving an F1 connection establishment response message sent by the target host;

and sending indication information to the child node of the IAB node, wherein the indication information is used for triggering the F1 connection establishment or migration of the child node of the IAB node.

Optionally, the F1 connection establishment response message carries an RRC signaling;

the sending of the indication information to the child node of the IAB node includes:

and sending the RRC signaling to a child node of the IAB node, wherein the RRC signaling is used for triggering F1 connection establishment or migration of the child node.

Optionally, the sending the indication information to the child node of the IAB node includes:

and sending back adaptive protocol BAP layer signaling to a child node of the IAB node, wherein the signaling is used for triggering the F1 connection establishment or migration of the child node.

receiving F1 interface signaling sent by the target host;

and sending the F1 interface signaling to a child node of the IAB node, wherein the signaling is used for triggering the F1 connection establishment or migration of the child node.

Optionally, the IAB node includes a top-level migration node or a non-top-level migration node.

Optionally, the IAB node is a top-level migration node that is handed over to the target host;

before sending the F1 connection establishment request to the target host, the method further includes:

receiving an RRC reconfiguration message sent by a source host, wherein the RRC reconfiguration message is carried in a switching response sent by the target host to the source host, and the RRC reconfiguration message carries configuration parameters of the IAB node; the source host is a host before the IAB node is switched;

and reconfiguring the IAB node according to the configuration parameters of the IAB node.

Optionally, the RRC reconfiguration message further carries a global cell identity CGI of the access node under the target host;

after the reconfiguring the IAB node according to the configuration parameters of the IAB node, the method further includes:

and carrying out a random access process according to the CGI of the access node under the target host.

Optionally, the RRC reconfiguration message further carries information of a default channel and a default route between the target host and the IAB node;

the sending of the F1 connection establishment request to the target host includes:

sending the F1 connection establishment request to the target host using the default channel and the default route.

Optionally, the IAB node is a non-top-level migration node that is handed over to the target host;

receiving an RRC reconfiguration message sent by a parent node of the IAB node, wherein the RRC reconfiguration message is carried in a switching response sent by the target host to a source host and is sent to the parent node by the source host; the source host is a host before the IAB node is switched;

reconfiguring the IAB node according to the RRC reconfiguration message;

and receiving the indication information sent by the parent node.

Optionally, after the reconfiguring the IAB node according to the RRC reconfiguration message, the method further includes:

and sending an RRC reconfiguration complete message to the parent node, wherein the RRC reconfiguration complete message is used for being sent to the target host through the F1 connection between the parent node and the target host.

Optionally, the default channel is a default backhaul radio link control, BH, RLC channel; the default route is a default backhaul adaptation protocol, BAP, identity route.

According to another aspect of the present disclosure, there is provided a connection establishment method, which is applied to a target host, the method including:

receiving an F1 connection establishment request accessed to the backhaul integrated IAB node, wherein the target host is a host to which the IAB node is to be switched; the F1 connection establishment request is used for requesting to establish an F1 connection between the IAB node and the target host;

sending an F1 connection establishment success indication and indication information to the IAB node, wherein the indication information is used for triggering F1 connection establishment or migration of child nodes of the IAB node.

Optionally, the sending, to the IAB node, an F1 connection establishment success indication and indication information includes:

sending an F1 connection establishment response message to the IAB node, for indicating that the connection establishment of the IAB node F1 is successful;

wherein the F1 connection establishment response message carries RRC signaling, which is used to trigger the F1 connection establishment or migration of the child node of the IAB node.

and sending F1 interface signaling to the IAB node for triggering the F1 connection establishment or migration of the child nodes of the IAB node.

Optionally, before receiving the F1 connection establishment request to access the backhaul integrated IAB node, the method further includes:

receiving a switching request sent by the source host, wherein the source host is a host before the IAB node is switched;

and sending a switching response to the source host, wherein the switching response carries the RRC reconfiguration message of the IAB node and is used for reconfiguring the IAB node.

the method further comprises the following steps:

and receiving an RRC reconfiguration complete message sent by the IAB node, wherein the RRC reconfiguration complete message is a message sent by the IAB node after reconfiguration is carried out according to the RRC reconfiguration message.

the method further comprises the following steps:

receiving an RRC reconfiguration complete message sent by a parent node of the IAB node, wherein the RRC reconfiguration complete message is sent to the parent node after the IAB node performs reconfiguration according to the RRC reconfiguration message, and the parent node is sent through an F1 connection with the target host.

Optionally, the number of IAB nodes is multiple, and the number of RRC reconfiguration messages is multiple;

and the switching response carries an RRC reconfiguration message sequence and is used for sequentially sending the plurality of RRC reconfiguration messages according to the RRC reconfiguration message sequence.

Optionally, before sending the handover response to the source host, the method further includes:

determining a number of node hops between a plurality of the IAB nodes and the target host;

and sequencing the RRC reconfiguration messages of the IAB nodes in an ascending order according to the node hop number to obtain the RRC reconfiguration message sequence.

and sequencing the RRC reconfiguration messages of the IAB nodes in a descending order according to the node hop number to obtain the RRC reconfiguration message sequence.

According to another aspect of the present application, there is provided 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:

receiving F1 interface signaling sent by the target host;

reconfiguring the IAB node according to the RRC reconfiguration message;

and receiving the indication information sent by the parent node.

According to another aspect of the present application, there is provided a target host comprising a memory, a transceiver, a processor:

the processor further performs the following operations:

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

a sending unit, configured to send an F1 connection establishment request to a target host, where the F1 connection establishment request is used to request to establish an F1 connection between the IAB node and the target host; the target host is a host to which the IAB node is to be switched;

a receiving unit, configured to receive an F1 connection establishment response message sent by the target host;

the sending unit is further configured to send indication information to the child node of the IAB node, where the indication information is used to trigger establishment or migration of an F1 connection of the child node of the IAB node.

According to another aspect of the present application, there is provided a connection establishment apparatus, which is applied to a target host, the apparatus including:

a receiving unit, configured to receive an F1 connection establishment request that accesses a backhaul integrated IAB node, where the target host is a host to which the IAB node is to be switched; the F1 connection establishment request is used for requesting to establish an F1 connection between the IAB node and the target host;

a sending unit, configured to send an F1 connection establishment success indication and indication information to the IAB node, where the indication information is used to trigger the F1 connection establishment or migration of a child node of the IAB node.

According to another aspect of the present application, a processor-readable storage medium is provided, which stores a computer program for causing a processor to execute a connection establishment method for accessing a backhaul unification IAB node or a connection establishment method for a target host.

The application has the following technical effects:

sending an F1 connection establishment request to a target host, wherein the F1 connection establishment request is used for requesting to establish an F1 connection between the IAB node and the target host; the target host is a host to which the IAB node is to be switched; receiving an F1 connection establishment response message sent by the target host; and sending indication information to the child node of the IAB node, wherein the indication information is used for triggering the F1 connection establishment or migration of the child node of the IAB node. Therefore, after the connection of the F1 is successfully established, the IAB node may send indication information to the child node, which is used to trigger the establishment or migration of the F1 connection of the child node, so as to implement the establishment of a new F1 connection or migration between the IAB node and its descendants and the target host.

It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present disclosure, nor do they limit the scope of the present disclosure. Other features of the present disclosure 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 flowchart of a connection establishment method according to an embodiment of the present application;

fig. 2 is a schematic flowchart of another connection establishment method provided in an embodiment of the present application;

FIG. 3 is a diagram illustrating the relationship between an IAB node and a source host before handover;

FIG. 4 is a diagram illustrating the relationship between an IAB node and a target host after handover;

FIG. 5 is a signaling interaction diagram of an IAB node, a source host, and a target host in accordance with an embodiment;

FIG. 6 is a signaling interaction diagram of an IAB node, a source host and a target host in accordance with another embodiment;

FIG. 7 is a signaling interaction diagram of an IAB node, a source host and a target host in accordance with another embodiment;

FIG. 8 is a signaling interaction diagram of an IAB node, a source host and a target host in accordance with another embodiment;

fig. 9 is a schematic structural diagram of an IAB node according to an embodiment of the present application;

FIG. 10 is a schematic diagram of a target host according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a connection establishing apparatus according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a connection establishing 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.

In the embodiment of the present application, the term "and/or" describes an association relationship of associated objects, and means that there may be three relationships, for example, a and/or B, which may mean: 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.

The related art relates to in-home migration of IAB nodes. Inhome migration, which refers to the switching of an IAB node and its descendants from one distributed unit of a home to another, does not involve the switching of the home and does not involve the establishment of a new F1 connection. When the IAB node needs to be migrated between hosts, the IAB node and its descendant node need to establish a new F1 connection with the target host, however, in the related art, how the IAB node and its descendant node establish a new F1 connection with the target host is not involved.

In order to solve the foregoing problems, embodiments of the present application provide a connection establishment method, apparatus, device, and storage medium. Sending an F1 connection establishment request to a target host, wherein the F1 connection establishment request is used for requesting to establish an F1 connection between the IAB node and the target host; the target host is a host to which the IAB node is to be switched; receiving an F1 connection establishment response message sent by the target host; and sending indication information to the child node of the IAB node, wherein the indication information is used for triggering the F1 connection establishment or migration of the child node of the IAB node. Therefore, after the F1 connection is successfully established, the IAB node can send indication information to the child node to trigger the F1 connection establishment or migration of the child node, and the IAB node and the descendant nodes thereof can establish new F1 connection or migration with the target host.

The connection establishment method, apparatus, device, and 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 each include a terminal device and a network-side device. The System may further include a core network portion, such as an Evolved Packet System (EPS), a 5G System (5GS), and the like.

Fig. 1 is a flowchart illustrating a connection establishment method according to an embodiment of the present application, where the information processing method is applied to an Access Backhaul Integrated (IAB) node.

As shown in fig. 1, the method comprises:

step 11, sending an F1 connection establishment request to the target host, wherein the F1 connection establishment request is used for requesting to establish an F1 connection between the IAB node and the target host; the target host is a host to which the IAB node is to be switched.

The IAB node in the embodiment of the present application includes a top-level migration node or a non-top-level migration node that is switched from a source host to a target host; the top migration node is the node with the least node hop count with the source host in the IAB node which needs to be switched from the source host to the target host, and the parent node of the IAB node does not need to be switched. The non-top migration node is a descendant node of the top migration node.

In some example embodiments, the IAB node may be a top level migration node that is handed off to a target host. In this exemplary embodiment, prior to step 11, the IAB node may perform the following steps: receiving an RRC reconfiguration message sent by a source host, wherein the RRC reconfiguration message is carried in a switching response sent by a target host to the source host, and the RRC reconfiguration message carries configuration parameters of an IAB node; the source host is a host before the IAB node is switched; and reconfiguring the IAB node according to the configuration parameters of the IAB node.

In the above exemplary embodiment, the IAB node is a top-level migration node that is handed over to the target host, and after reconfiguration, the IAB node may send an F1 connection establishment request to the target host to establish an F1 connection with the target host.

In the above exemplary embodiment, the RRC reconfiguration message also carries information of a default channel and a default route between the target host and the IAB node. In a first implementation scenario, after reconfiguration, the IAB node may send an RRC reconfiguration complete message to the target host by using a default channel and a default route, so as to send the RRC reconfiguration complete message of the IAB node to the target host in time. Wherein the default channel is a Backhaul Radio Link Control (BH RLC) channel; the default route is a default Backhaul Adaptation Protocol (BAP) identified route. In a second implementation scenario, after the reconfiguration, if the F1 connection between the IAB node and the target host is successfully established, an RRC reconfiguration complete message is sent to the target host through the F1 connection.

In the above exemplary embodiment, the RRC reconfiguration message also carries a Global Cell identity (CGI) of the access node under the target host. Correspondingly, after the IAB node reconfigures the IAB node according to the configuration parameters of the IAB node, the following steps may also be performed: and performing a random access process according to the CGI of the access node under the target host. After the random access is completed, the default channel between the IAB node and the target host is communicated, so that the IAB node can adopt the default channel and the default route to send the F1 connection establishment request to the target host.

In the above exemplary embodiment, the configuration parameter of the IAB node carries a target global cell identity CGI that is newly allocated to the IAB node by the target host, and in the random access process, the random access request sent by the IAB node to the access node carries the target CGI of the IAB node, so that the access node knows the target CGI of the IAB node.

In other exemplary embodiments, the IAB node may be a non-top level migration node that is handed off to the target host. In this exemplary embodiment, prior to step 11, the IAB node may perform the following steps: receiving an RRC reconfiguration message sent by a parent node of an IAB node, wherein the RRC reconfiguration message is carried in a switching response sent by a target host to a source host and is sent to the parent node by the source host; the source host is a host before the IAB node is switched; reconfiguring the IAB node according to the RRC reconfiguration message; and receiving indication information sent by the parent node.

In the above exemplary embodiment, the IAB node is a top-level migration node that is handed over to the target host, and after reconfiguration, needs to wait for the indication information sent by the parent node. After receiving the indication information sent by the parent node, it is determined that the F1 connection establishment of the parent node is completed, so that an F1 connection establishment request can be sent to the target host to establish an F1 connection with the target host.

In the above exemplary embodiment, the RRC reconfiguration message further carries information of a default channel and a default route between the target host and the IAB node; after reconfiguration and receiving the indication information sent by the parent node, determining the default channel connection between the IAB node and the target host, so that the IAB node can send an F1 connection establishment request to the target host by using the default channel and the default route.

In the above exemplary embodiment, after the reconfiguration, an RRC reconfiguration complete message is sent to the parent node for sending the RRC reconfiguration complete message to the target host through the F1 connection between the parent node and the target host.

And step 12, receiving an F1 connection establishment response message sent by the target host.

And step 13, sending indication information to the child node of the IAB node, wherein the indication information is used for triggering the F1 connection establishment or migration of the child node of the IAB node.

In some exemplary embodiment modes, the F1 connection setup response message carries RRC signaling. Correspondingly, the process of the IAB node performing step 13 may specifically be that the RRC signaling is sent to a child node of the IAB node, so as to trigger the F1 connection establishment or migration of the child node.

In the above exemplary embodiment, when the target host sends the F1 connection establishment response message to the IAB node, the F1 connection between the child node of the IAB node and the target host is not yet established, and the child node of the IAB node may not be reconfigured, so that the RRC signaling needs to be sent to the child node through the IAB node. The IAB node may send RRC signaling to the child node through the Uu interface with the child node.

In other exemplary embodiments, the IAB node performing step 13 may specifically be sending back an adaptive protocol BAP layer signaling to a child node of the IAB node, for triggering the F1 connection establishment or migration of the child node.

In other exemplary embodiment manners, the process of the IAB node performing step 13 may specifically be to receive an F1 interface signaling sent by the target host; and sending F1 interface signaling to the child node of the IAB node for triggering the F1 connection establishment or migration of the child node.

In the foregoing exemplary embodiment, after the F1 connection of the IAB node is successfully established, the target host may send an F1 interface signaling to the IAB node through the F1 connection with the IAB node, and the IAB node sends an F1 interface signaling to the child node through the Uu interface with the child node, so as to trigger the F1 connection establishment or migration of the child node.

In the foregoing exemplary embodiment, triggering the F1 connection establishment of the child node means that in an inter-host handover (inter-CU) scenario, the child node is handed over from a source host to a target host, a new F1 connection needs to be established with the target host, and after receiving the indication information, the child node sends an F1 connection establishment request to the target host. Triggering F1 connection migration of a child node refers to that in an intra-host switching (intra-CU) scene, the child node is switched from one distributed unit of the same host to another distributed unit, the F1 connection of the child node and the host is unchanged, but the child node needs to be migrated from one distributed unit to another distributed unit.

The embodiment of the present application provides a connection establishment method, where an F1 connection establishment request is sent to a target host, where the F1 connection establishment request is used to request establishment of an F1 connection between an IAB node and the target host; the target host is a host to which the IAB node is to be switched; receiving an F1 connection establishment response message sent by the target host; and sending indication information to the child nodes of the IAB node, wherein the indication information is used for triggering the F1 connection establishment or migration of the child nodes of the IAB node. Therefore, after the connection of the F1 is successfully established, the IAB node may send indication information to the child node, which is used to trigger the establishment or migration of the F1 connection of the child node, so as to implement the establishment of a new F1 connection or migration between the IAB node and its descendants and the target host.

Fig. 2 is a flowchart illustrating another connection establishment method according to an embodiment of the present application. The method is applied to a target host.

As shown in fig. 2, the connection establishment method may include:

step 21, receiving an F1 connection establishment request for accessing the backhaul integrated IAB node, wherein a target host is a host to which the IAB node is to be switched; and F1 connection establishment request for requesting to establish F1 connection between the IAB node and the target host.

In some example embodiment modes, the IAB node may be a top level migration node that is handed over to a target host. In this exemplary embodiment, the target host may further perform the following steps: and receiving an RRC reconfiguration complete message sent by the IAB node, wherein the RRC reconfiguration complete message is a message sent after the IAB node performs reconfiguration according to the RRC reconfiguration message.

In the above exemplary embodiment, the 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. In a first implementation scenario, with a default channel and a default route between the target host and the IAB node, the target host may receive an RRC reconfiguration complete message sent by the IAB node, receive an F1 connection establishment request sent by the IAB node, and send an F1 connection establishment response message to the IAB node. In a second implementation scenario, with a default channel and a default route between the target host and the IAB node, the target host may receive an F1 connection establishment request sent by the IAB node, send an F1 connection establishment response message to the IAB node, and receive an RRC reconfiguration complete message sent by the IAB node through the F1 connection after the F1 connection is successfully established.

In other exemplary embodiments, the IAB node may be a non-top level migration node that is handed off to the target host. In this exemplary embodiment, the target host may further perform the following steps: and receiving an RRC reconfiguration complete message sent by a parent node of the IAB node, wherein the RRC reconfiguration complete message is sent to the parent node after the IAB node reconfigures according to the RRC reconfiguration message, and the parent node is sent through the F1 connection with the target host.

In the above exemplary embodiment, the 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; with a default channel and a default route between the target home and the IAB node, the target home may receive the F1 connection setup request sent by the IAB node and send an F1 connection setup response message to the IAB node.

And step 22, sending an F1 connection establishment success indication and indication information to the IAB node, wherein the indication information is used for triggering the F1 connection establishment or migration of the child nodes of the IAB node.

In some exemplary embodiments, the target host performing step 22 may specifically be to send an F1 connection establishment response message to the IAB node, for indicating that the connection establishment of the IAB node F1 is successful; wherein, the F1 connection establishment response message carries RRC signaling, which is used to trigger the F1 connection establishment or migration of the child node of the IAB node.

In other exemplary embodiments, the target host performing step 22 may specifically be to send an F1 connection establishment response message to the IAB node, for indicating that the connection establishment of the IAB node F1 is successful; and sending F1 interface signaling to the IAB node for triggering the F1 connection establishment or migration of the child nodes of the IAB node.

In the above exemplary embodiment, in an inter-host handover (inter-CU) scenario, triggering F1 connection establishment of the child node means that the child node is handed over from a source host to a target host, and needs to establish a new F1 connection with the target host, and after receiving the indication information, the child node sends an F1 connection establishment request to the target host. In the inter-host switching scenario, triggering the F1 connection migration of the child node refers to migrating the F1 connection request between the child node and the source host to between the child node and the target host. In an intra-host switching (intra-CU) scene, triggering F1 connection migration of a child node means that the child node is switched from one distributed unit of the same host to another distributed unit, and F1 connection of the child node and the host is unchanged, but needs to be migrated from one distributed unit to another distributed unit.

In some exemplary embodiments, before step 21, the target host may further perform the following steps: receiving a switching request sent by a source host, wherein the source host is a host before switching of an IAB node; and sending a switching response to the source host, wherein the switching response carries the RRC reconfiguration message of the IAB node and is used for reconfiguring the IAB node.

In the above exemplary embodiment, the handover request carries any one or more of the following information: (1) context information of the top migration node and the descendant nodes thereof; (2) context information of User Equipment (UE) below a top-level migration node, and context information of UE below a descendant node; (3) and topology information between the top migration node and the descendant nodes thereof. The handover response carries: the RRC reconfiguration message of the top migration node, the RRC reconfiguration message of the descendant node of the top migration node, and the RRC reconfiguration message of the top migration node and the user equipment UE under the descendant node.

The UE in the embodiment of the present application may be a terminal device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or another 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 the above exemplary embodiment, the number of IAB nodes is plural, and the number of RRC reconfiguration messages is plural; the switching response carries the RRC reconfiguration message sequence, and is configured to sequentially send the plurality of RRC reconfiguration messages according to the RRC reconfiguration message sequence.

In the above exemplary implementation, in the first implementation scenario, before sending the handover response to the source host, the target host may further perform the following steps: determining node hop counts between a plurality of IAB nodes and the target host; and sequencing the RRC reconfiguration messages of the IAB nodes in an ascending order according to the node hop number to obtain an RRC reconfiguration message sequence. In a second implementation scenario, before sending the handover response to the source host, the target host may further perform the following steps: determining node hop counts between the plurality of IAB nodes and the target host; and sequencing the RRC reconfiguration messages of the IAB nodes in a descending order according to the node hop number to obtain an RRC reconfiguration message sequence.

In the above exemplary embodiment, the ascending order means that the IAB nodes with a smaller number of node hops are ordered before and the IAB nodes with a larger number of node hops are ordered after each other, and the RRC reconfiguration message can be sent to the IAB nodes with a smaller number of node hops first and then sent to the IAB nodes with a larger number of node hops, where the number of node hops between the top-level migration node and the target host is the smallest, so that the IAB nodes with a smaller number of node hops can be reconfigured and the F1 connection can be established in time. The node hop count refers to the number of nodes needing to be jumped from the IAB node to the target host. For example, if the IAB nodes under the target host are, in order, IAB node 2, IAB node 4, IAB node 5, IAB node 6, and IAB node 7, the node hop count between IAB node 4 and the target host is 2, the node hop count between IAB node 2 and the target host is 1, and the node hop count between IAB node 5 and the target host is 3.

In the foregoing exemplary embodiment, the descending order means that the IAB nodes with a larger number of node hops are ordered before the IAB nodes with a smaller number of node hops are ordered after the IAB nodes with a larger number of node hops are ordered, the RRC reconfiguration message can be sent to the IAB nodes with a larger number of node hops first, and the RRC reconfiguration message can be sent to the IAB nodes with a smaller number of node hops after the IAB nodes with a smaller number of node hops are ordered, where the number of node hops between the top-level migration node and the target host is the smallest, so that the F1 connection establishment can be performed on the descendant nodes in time after the F1 connection establishment of the top-level migration node is successful, and the total time consumed by the F1 connection establishment of each IAB node is shortened.

According to the connection establishing method, an F1 connection establishing request of an integrated IAB node is received and accessed and returned, wherein a target host is a host to which the IAB node is to be switched; an F1 connection establishment request for requesting to establish an F1 connection between the IAB node and the target host; and sending an F1 connection establishment success indication and indication information to the IAB node, wherein the indication information is used for triggering F1 connection establishment or migration of the child nodes of the IAB node. Therefore, after the F1 connection of the IAB node is successfully established, the indication information can be sent to the child nodes of the IAB node, the F1 connection establishment or migration of the child nodes is triggered, and the new F1 connection establishment or migration of the IAB node and the descendant nodes thereof and the target host is realized.

In the embodiment of the present application, the relationship between a node, a source host, and a target host in a connection establishment process is described by using a relationship diagram between an IAB node before handover and the source host shown in fig. 3 and a relationship diagram between an IAB node after handover and the target host shown in fig. 4. Wherein, the host comprises an IAB host Centralized Unit (IAB Donor CU) and an IAB host Distributed Unit (IAB Donor DU). A plurality of IAB denor DUs may be connected below one IAB denor CU.

The IAB node includes an IAB node Distributed Unit (IAB node DU) and an IAB node Mobile terminal (IAB node MT). The IAB node DU is connected to the IAB node CU through an F1 interface, and the IAB node MT is connected to the IAB node DU of the next layer through a Uu interface. If a user equipment UE is connected under a certain IAB node, the IAB node DU is connected to the UE.

In fig. 3, the CU on the left represents a source hosting centralized unit, and the first DU on the left represents a source hosting distributed unit. The first MT and DU on the left side are respectively a mobile terminal and a distributed unit of the IAB node 1 under the source host; the second MT and DU groups on the left side are respectively the mobile terminal and the distributed unit of the IAB node 3 under the source host; the third group of MT and DU is the mobile terminal and the distributed unit of the IAB node 5 under the source host before the switching; the fourth set of MT and DU are the mobile terminal and distributed units of the IAB node 6 under the source host before handover; the fifth set of MT and DU is the mobile terminal and distributed unit of the lower IAB node 7 of the source-host before handover; UE denotes a user terminal under the node 7 before handover.

The right CU represents the target-hosting centralized unit. The first DU on the right represents the target-hosting distributed unit. The first MT and DU on the right side are respectively the mobile terminal and the distributed unit of the IAB node 2 under the target host; the second set of MT and DU on the right are the mobile terminal and the distributed unit, respectively, of the IAB node 4 under the target host.

The IAB node 5 is a top-level migration node that switches from a source host to a target host. IAB node 6 and IAB node 7 are descendant nodes of IAB node 5. In the diagrams shown in fig. 3 and 4, IAB node 5, IAB node 6, IAB node 7 and UE are the IAB nodes and devices to be migrated to the target host.

The IAB node according to the embodiment of the present invention is a network side device, and may be a base station, and the base station may include a plurality of cells for providing services to a terminal. A base station may also be referred to as an access point, or a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or by other names, depending on the particular application. The network-side device may be configured to exchange the received air frame with an Internet Protocol (IP) packet as a router between the wireless terminal device and the rest of the access network, where the rest of the access network may include an Internet Protocol (IP) communication network. The network side device may also coordinate attribute management for the air interface. For example, the network side device according to the embodiment of the present application may be a Base Transceiver Station (BTS) in a Global System for Mobile communications (GSM) or a Code Division Multiple Access (CDMA), may also be a network side device (NodeB) in a Wideband Code Division Multiple Access (WCDMA), may also be a evolved Node B (eNB) or an e-NodeB) in a Long Term Evolution (LTE) System, may also be a 5G Base Station (gNB) in a 5G network architecture (next generation System), may also be a Home evolved Node B (Home evolved Node B, HeNB), a relay Node (relay Node), a Home Base Station (pico), and the like, and is not limited in the embodiments of the present application. In some network structures, the network side device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, and the centralized unit and the distributed unit may be geographically separated.

In some exemplary embodiments, the RRC signaling triggering the F1 connection establishment or migration of the child node is carried in the F1 connection establishment response message, or is sent to the child node by the IAB node through BAP layer signaling, and the user equipment UE with the largest hop count of the source-host master node starts sending the RRC reconfiguration message. As shown in fig. 5, a signaling interaction diagram of an IAB node, a source host and a target host in the implementation manner of the foregoing embodiment includes the following steps:

step 1, the source host sends a switch request (Xn handover request) to the target host, requesting to migrate IAB node 5, and its following descendant nodes and UE to IAB DONOR CU2 (representing the target host).

The source and the sink are represented by IAB DONOR CU1 in FIG. 5.

And step 2, the target host sends a switching response (Xn handover request ACK) to the source host, wherein the switching response carries RRC reconfiguration messages of all the IAB nodes and the UE.

And step 3, the source host sends the RRC reconfiguration message (RRC reconfiguration) of the UE to the distributed unit of the IAB node 7, and the IAB node 7 sends the RRC reconfiguration message of the UE to the UE through a Uu interface.

Step 4, the UE sends an RRC reconfiguration complete message (RRC reconfiguration complete) of the UE to the IAB node 7.

And step 5, the source host sends the RRC reconfiguration message of the IAB node 7 to the distributed unit of the IAB node 6, and the IAB node 6 sends the RRC reconfiguration message of the IAB node 7 to the IAB node 7 through the Uu interface.

Step 6, the IAB node 7 sends an RRC reconfiguration complete message for the IAB node 7 to the IAB node 6.

And step 7, the source host sends the RRC reconfiguration message of the IAB node 6 to the distributed unit of the IAB node 5, and the IAB node 5 sends the RRC reconfiguration message of the IAB node 6 to the IAB node 6 through the Uu interface.

Step 8, the IAB node 6 sends an RRC reconfiguration complete message of the IAB node 6 to the IAB node 5.

Step 9, the source host sends the RRC reconfiguration message of the IAB node 5 to the distributed unit of the IAB node 5.

Step 10, IAB node 5 randomly accesses to the access node (IAB node 4 under the target host).

Step 11, the IAB node 5 sends an RRC reconfiguration complete message to the target host through the default channel and the default route in the RRC reconfiguration message.

Step 12, IAB node 5 sends F1 connection setup request to the target host (F1 setup request).

Step 13, the target host sends F1 connection setup response message (F1 setup response) to the IAB node 5, which carries the RRC signaling of the IAB node 6.

Step 14, IAB node 5 sends RRC signaling to IAB node 6 to instruct IAB node 6 to perform F1 connection setup.

In the embodiment of the present application, step 13 and step 14 may be replaced by step 13 'and step 14' in fig. 5. Step 13' is a F1 connection establishment response message not carrying RRC signaling; step 14' is IAB node 5 sending BAP layer signaling to IAB node 6 instructing IAB node 6 to perform F1 connection setup.

Step 15, IAB node 6 sends an F1 connection setup request to the target host.

Step 16, the target host sends F1 connection setup response message to IAB node 6, which carries RRC signaling of IAB node 7.

Step 17, IAB node 6 sends RRC signaling to IAB node 7 to instruct IAB node 7 to perform F1 connection setup.

In the embodiment of the present application, step 16 and step 17 may be replaced by step 16 'and step 17' in fig. 5. Step 16' is an F1 connection setup response message not carrying RRC signaling; step 17' is for IAB node 6 to send BAP layer signaling to IAB node 7 instructing IAB node 7 to perform F1 connection setup.

At step 18, IAB node 7 sends an F1 connection setup request to the target host.

Step 19, the target host sends an F1 connection setup response message to the IAB node 7.

Step 20, the IAB node 7 sends the RRC reconfiguration complete message of the UE to the target host.

In step 21, the IAB node 6 sends an RRC reconfiguration complete message of the IAB node 7 to the target host.

Step 22, the IAB node 5 sends an RRC reconfiguration complete message of the IAB node 6 to the target host.

Wherein, step 21 can be placed at any position after step 16, and step 22 can be placed at any position after step 13.

In this embodiment of the present application, after the connection establishment of the F1 is successful, the IAB node may send an RRC signaling to the child node according to the indication of the target host, or send a BAP layer signaling to the child node according to the F1 connection establishment response message, to indicate the child node to establish the F1 connection, so as to establish a new F1 connection between the IAB node and its descendant node and the target host.

In some exemplary embodiments, the RRC signaling that instructs the child node to perform F1 connection establishment is carried in the connection establishment response message, or the IAB node sends the connection establishment response message to the child node through BAP layer signaling, and the IAB node 5 with the fewest hops from the source node to the host node starts sending the RRC reconfiguration message. As shown in fig. 6, a signaling interaction diagram of an IAB node, a source host and a target host in the implementation manner of the foregoing embodiment includes the following steps:

The source and the sink are represented by IAB DONOR CU1 in fig. 6.

And step 3, the source host sends the RRC reconfiguration message of the IAB node 5 to the distributed unit of the IAB node 5.

And step 4, the IAB node 5 is randomly accessed to the access node (the IAB node 4 under the target host).

And step 5, the IAB node 5 sends an RRC reconfiguration complete message to the target host through a default channel in the RRC reconfiguration message and the default route.

And step 6, the source host sends the RRC reconfiguration message of the IAB node 6 to the distributed unit of the IAB node 5, and the IAB node 5 sends the RRC reconfiguration message of the IAB node 6 to the IAB node 6 through the Uu interface.

Step 7, the IAB node 6 sends an RRC reconfiguration complete message of the IAB node 6 to the IAB node 5.

Step 8, the IAB node 5 sends an F1 connection establishment request (F1 setup request) to the target host.

Step 9, the target host sends F1 connection setup response message (F1 setup response) to the IAB node 5, wherein the RRC signaling of the IAB node 6 is carried.

Step 10, IAB node 5 sends RRC signaling to IAB node 6 to instruct IAB node 6 to perform F1 connection setup.

In the embodiment of the present application, step 9 and step 10 may be replaced by step 9 'and step 10' in fig. 6. Step 9' is F1 connection establishment response message not carrying RRC signaling; step 10' is IAB node 5 sending BAP layer signaling to IAB node 6 instructing IAB node 6 to perform F1 connection setup.

Step 11, the source host sends the RRC reconfiguration message of the IAB node 7 to the distributed unit of the IAB node 6, and the IAB node 6 sends the RRC reconfiguration message of the IAB node 7 to the IAB node 7 through the Uu interface.

Step 12, the IAB node 7 sends an RRC reconfiguration complete message for the IAB node 7 to the IAB node 6.

Step 13 IAB node 6 sends an F1 connection setup request to the target host.

Step 14, the target host sends F1 connection setup response message to IAB node 6, which carries RRC signaling of IAB node 7.

Step 15, IAB node 6 sends RRC signaling to IAB node 7 to instruct IAB node 7 to perform F1 connection setup.

In the embodiment of the present application, step 14 and step 15 may be replaced by step 14 'and step 15' in fig. 6. Step 14' is a F1 connection setup response message not carrying RRC signaling; step 15' is for IAB node 6 to send BAP layer signaling to IAB node 7 instructing IAB node 7 to perform F1 connection setup.

Step 16, IAB node 7 sends an F1 connection setup request to the target host.

Step 17, the target host sends an F1 connection setup response message to the IAB node 7.

Step 18, the source host sends the RRC reconfiguration message (RRC reconfiguration) of the UE to the distributed unit of the IAB node 7, and the IAB node 7 sends the RRC reconfiguration message of the UE to the UE through the Uu interface.

In step 19, the UE randomly accesses to the access node (IAB node 4 under the target host).

In step 20, the UE sends an RRC reconfiguration complete message (RRC reconfiguration complete) of the UE to the IAB node 7.

Step 21, the IAB node 7 sends the RRC reconfiguration complete message of the UE to the target host.

Step 22, the IAB node 6 sends an RRC reconfiguration complete message of the IAB node 7 to the target host.

Step 23, the IAB node 5 sends an RRC reconfiguration complete message of the IAB node 6 to the target host.

Wherein, step 22 can be placed at any position after step 14, and step 23 can be placed at any position after step 9.

In some exemplary embodiments, the target host sends F1 interface signaling to the IAB node, which is used to instruct the sub-nodes of the IAB node to perform F1 connection establishment, and the user equipment UE with the largest hop count of the source host master and slave nodes starts sending RRC reconfiguration message. As shown in fig. 7, a signaling interaction diagram of an IAB node, a source host and a target host in the implementation manner of the foregoing embodiment includes the following steps:

The source and the sink are represented by IAB DONOR CU1 in fig. 7.

Step 13, the target host sends a F1 connection setup response message to the IAB node 5 (F1 setup response).

Step 14, the target host sends F1 interface signaling to the IAB node 6, instructing the IAB node 6 to establish F1 connection.

Step 15, IAB node 6 sends an F1 connection setup request to the target host.

Step 16, the target host sends an F1 connection setup response message to the IAB node 6.

Step 17, the target host sends F1 interface signaling to the IAB node 7, instructing the IAB node 7 to establish F1 connection.

At step 18, IAB node 7 sends an F1 connection setup request to the target host.

In this embodiment of the present application, after the F1 connection of the IAB node is successfully established, the target host may send an F1 interface signaling to the child node of the IAB node, instruct the child node to establish an F1 connection, and implement that the IAB node and its descendant nodes establish a new F1 connection with the target host.

In some exemplary embodiments, the target host sends F1 interface signaling to the IAB node to instruct the sub-nodes of the IAB node to perform F1 connection establishment, and the IAB node 5 with the least hop count of the source host master and slave nodes starts sending RRC reconfiguration message. As shown in fig. 8, a signaling interaction diagram of an IAB node, a source host and a target host in the implementation manner of the foregoing embodiment includes the following steps:

The source and the sink are represented by IAB DONOR CU1 in fig. 8.

Step 9, the target host sends a F1 connection setup response message to the IAB node 5 (F1 setup response).

Step 10, the target host sends F1 interface signaling to the IAB node 6, instructing the IAB node 6 to establish F1 connection.

Step 13 IAB node 6 sends an F1 connection setup request to the target host.

Step 14, the target host sends an F1 connection setup response message to the IAB node 6.

Step 15, the target host sends F1 interface signaling to the IAB node 7, instructing the IAB node 7 to establish F1 connection.

Step 16, IAB node 7 sends an F1 connection setup request to the target host.

In step 19, the UE sends an RRC reconfiguration complete message (RRC reconfiguration complete) of the UE to the IAB node 7.

Fig. 9 is a schematic structural diagram of an access backhaul integrated IAB node according to an embodiment of the present application.

As shown in fig. 9, the IAB node switches from a source host to a target host, and the IAB node includes a memory 900, a transceiver 910, and a processor 920:

a transceiver 910 for receiving and transmitting data under the control of the processor 920.

Wherein in fig. 9, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by the processor 920, and various circuits, represented by the memory 900, 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 910 may be a number 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. 9, the IAB node may also include a user interface 930. for different user devices, the user interface 930 may also be an interface capable of interfacing externally to a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 920 is responsible for managing the bus architecture and general processing, and the memory 900 may store data used by the processor 920 in performing operations.

Alternatively, the processor 920 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 920 may also adopt a multi-core architecture.

The processor 920 calls the computer program stored in the memory and executes the following operations:

Optionally, as another embodiment, the F1 connection setup response message carries an RRC signaling. The processor 920 is specifically configured to send the RRC signaling to a child node of the IAB node, where the RRC signaling is used to trigger establishment or migration of an F1 connection of the child node.

Optionally, as another embodiment, the processor 920 is specifically configured to send a backhaul adaptation protocol BAP layer signaling to a child node of the IAB node, where the signaling is used to trigger establishment or migration of an F1 connection of the child node.

Optionally, as another embodiment, the processor 920 is specifically configured to receive an F1 interface signaling sent by the target host; and sending the F1 interface signaling to a child node of the IAB node, wherein the signaling is used for triggering the F1 connection establishment or migration of the child node.

Optionally, as another embodiment, the IAB node includes a top-level migration node or a non-top-level migration node.

Optionally, as another embodiment, the IAB node is a top-level migration node that is handed over to the target host. The processor 920 is further configured to receive, before sending the F1 connection establishment request to the target host, an RRC reconfiguration message sent by a source host, where the RRC reconfiguration message is carried in a handover response sent by the target host to the source host, and the RRC reconfiguration message carries configuration parameters of the IAB node; the source host is a host before the IAB node is switched; and reconfiguring the IAB node according to the configuration parameters of the IAB node.

Optionally, as another embodiment, the RRC reconfiguration message further carries a global cell identity CGI of the access node in the target host; the processor 920 is further configured to perform a random access procedure according to the CGI of the access node under the target host after the IAB node is reconfigured according to the configuration parameters of the IAB node.

Optionally, as another embodiment, the RRC reconfiguration message further carries information of a default channel and a default route between the target host and the IAB node; the processor 920 is specifically configured to send the F1 connection establishment request to the target host by using the default channel and the default route.

Optionally, as another embodiment, the IAB node is a non-top migration node that is handed over to the target host. The processor 920 is further configured to receive, before sending the F1 connection establishment request to the target host, an RRC reconfiguration message sent by a parent node of the IAB node, where the RRC reconfiguration message is carried in a handover response sent by the target host to a source host and is sent by the source host to the parent node; the source host is a host before the IAB node is switched; reconfiguring the IAB node according to the RRC reconfiguration message; and receiving the indication information sent by the parent node.

Optionally, as another embodiment, the processor 920 is further configured to, after reconfiguring the IAB node according to the RRC reconfiguration message, send an RRC reconfiguration complete message to the parent node, where the RRC reconfiguration complete message is sent to the target host through an F1 connection between the parent node and the target host.

Optionally, as another embodiment, the default channel is a default backhaul radio link control, BH, RLC channel; the default route is a default backhaul adaptation protocol, BAP, identity route.

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. 10 is a schematic structural diagram of a target host provided according to an embodiment of the present application. As shown in fig. 10, the target host may include a memory 1000, a transceiver 1010, a processor 1020,

wherein:

a transceiver 1010 for receiving and transmitting data under the control of the processor 1020.

Wherein in fig. 10, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1020 and various circuits of memory represented by memory 1000 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 1010 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 1020 is responsible for managing the bus architecture and general processing, and the memory 1000 may store data used by the processor 1020 in performing operations.

The processor 1020 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a complex 14Programmable Logic Device (CPLD), and may also have a multi-core architecture.

The processor 1020, by calling a computer program stored in memory, performs the following operations:

Optionally, as another embodiment, the processor 1020 is specifically configured to send an F1 connection establishment response message to the IAB node, where the F1 connection establishment response message is used to indicate that the connection establishment of the IAB node F1 is successful; wherein the F1 connection establishment response message carries RRC signaling, which is used to trigger the F1 connection establishment or migration of the child node of the IAB node.

Optionally, as another embodiment, the processor 1020 is specifically configured to send an F1 connection establishment response message to the IAB node, where the F1 connection establishment response message is used to indicate that the connection establishment of the IAB node F1 is successful;

Optionally, as another embodiment, the processor 1020 is further configured to receive a handover request sent by the source host before receiving an F1 connection establishment request accessing to a backhaul integrated IAB node, where the source host is a host before handover of the IAB node; and sending a switching response to the source host, wherein the switching response carries the RRC reconfiguration message of the IAB node and is used for reconfiguring the IAB node.

Optionally, as another embodiment, the IAB node is a top-level migration node that is handed over to the target host. The processor 1020 is further configured to receive an RRC reconfiguration complete message sent by the IAB node, where the RRC reconfiguration complete message is sent by the IAB node after reconfiguration according to the RRC reconfiguration message.

Optionally, as another embodiment, the IAB node is a non-top migration node that is handed over to the target host. The processor 1020 is further configured to receive an RRC reconfiguration complete message sent by a parent node of the IAB node, where the RRC reconfiguration complete message is sent to the parent node after the IAB node performs reconfiguration according to the RRC reconfiguration message, and the parent node is sent through an F1 connection with the target host.

Optionally, as another embodiment, the number of IAB nodes is multiple, and the number of RRC reconfiguration messages is multiple; and the switching response carries an RRC reconfiguration message sequence and is used for sequentially sending the plurality of RRC reconfiguration messages according to the RRC reconfiguration message sequence.

Optionally, as another embodiment, the processor 1020 is further configured to determine a node hop count between the plurality of IAB nodes and the target host before sending the handover response to the source host; and sequencing the RRC reconfiguration messages of the IAB nodes in an ascending order according to the node hop number to obtain the RRC reconfiguration message sequence.

Optionally, as another embodiment, the processor 1020 is further configured to determine a node hop count between the plurality of IAB nodes and the target host before sending the handover response to the source host; and sequencing the RRC reconfiguration messages of the IAB nodes in a descending order according to the node hop number to obtain the RRC reconfiguration message sequence.

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. 11 is a schematic structural diagram of a connection establishment apparatus according to an embodiment of the present application. As shown in fig. 11, the connection establishing apparatus is applied to an access backhaul integrated IAB node, and the connection establishing apparatus 110 includes:

a sending unit 1101, configured to send an F1 connection establishment request to a target host, where the F1 connection establishment request is used to request to establish an F1 connection between the IAB node and the target host; the target host is a host to which the IAB node is to be switched;

a receiving unit 1102, configured to receive an F1 connection setup response message sent by the target host;

the sending unit 1101 is further configured to send indication information to a child node of the IAB node, where the indication information is used to trigger establishment or migration of an F1 connection of the child node of the IAB node.

Further, the F1 connection establishment response message carries an RRC signaling; the sending unit 1101 is specifically configured to send the RRC signaling to a child node of the IAB node, and is configured to trigger establishment or migration of an F1 connection of the child node.

Further, the sending unit 1101 is specifically configured to send a backhaul adaptive protocol BAP layer signaling to a child node of the IAB node, and is configured to trigger establishment or migration of an F1 connection of the child node.

Further, the sending unit 1101 is specifically configured to receive an F1 interface signaling sent by the target host; and sending the F1 interface signaling to a child node of the IAB node, wherein the signaling is used for triggering the F1 connection establishment or migration of the child node.

Further, the IAB nodes include top-level migration nodes or non-top-level migration nodes.

Further, the IAB node is a top level migration node that is handed over to the target host. The receiving unit 1102 is further configured to receive an RRC reconfiguration message sent by a source host, where the RRC reconfiguration message is carried in a handover response sent by the target host to the source host, and the RRC reconfiguration message carries configuration parameters of the IAB node; the source host is a host before the IAB node is switched; and reconfiguring the IAB node according to the configuration parameters of the IAB node.

Further, the RRC reconfiguration message also carries a global cell identity CGI of the access node under the target host; the device further comprises: and the access unit carries out a random access process according to the CGI of the access node under the target host.

Further, the sending unit 1101 is specifically configured to send the F1 connection establishment request to the target host by using the default channel and the default route.

Further, the IAB node is a non-top level migration node that is handed over to the target host; the receiving unit 1102 is further configured to receive an RRC reconfiguration message sent by a parent node of the IAB node, where the RRC reconfiguration message is carried in a handover response sent by the target host to a source host, and is sent to the parent node by the source host; the source host is a host before the IAB node is switched; reconfiguring the IAB node according to the RRC reconfiguration message; and receiving the indication information sent by the parent node.

Further, the sending unit 1101 is further configured to send an RRC reconfiguration complete message to the parent node, and is configured to send the RRC reconfiguration complete message to the target host through an F1 connection between the parent node and the target host.

Further, the default channel is a default backhaul radio link control, BH, RLC channel; the default route is a default backhaul adaptation protocol, BAP, identity route.

The connection establishing apparatus provided in the embodiment of the present application sends an F1 connection establishment request to a target host, where the F1 connection establishment request is used to request to establish an F1 connection between the IAB node and the target host; the target host is a host to which the IAB node is to be switched; receiving an F1 connection establishment response message sent by the target host; and sending indication information to the child nodes of the IAB node, wherein the indication information is used for triggering the F1 connection establishment or migration of the child nodes of the IAB node. Therefore, after the connection of the F1 is successfully established, the IAB node may send indication information to the child node, which is used to trigger the establishment or migration of the F1 connection of the child node, so as to implement the establishment of a new F1 connection or migration between the IAB node and its descendants and the target host.

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. 12 is a schematic structural diagram of a connection establishing apparatus according to an embodiment of the present application. As shown in fig. 12, the apparatus is applied to a target host, and the connection establishing apparatus 120 includes:

a receiving unit 1201, configured to receive an F1 connection establishment request accessing to a backhaul integrated IAB node, where the target host is a host to which the IAB node is to be switched; the F1 connection establishment request is used for requesting to establish an F1 connection between the IAB node and the target host;

a sending unit 1202, configured to send an F1 connection establishment success indication and indication information to the IAB node, where the indication information is used to trigger F1 connection establishment or migration of a child node of the IAB node.

Further, the sending unit 1202 is specifically configured to send an F1 connection establishment response message to the IAB node, where the F1 connection establishment response message is used to indicate that the connection establishment of the IAB node F1 is successful; wherein the F1 connection establishment response message carries RRC signaling, which is used to trigger the F1 connection establishment or migration of the child node of the IAB node.

Further, the sending unit 1202 is specifically configured to send an F1 connection establishment response message to the IAB node, where the F1 connection establishment response message is used to indicate that the connection establishment of the IAB node F1 is successful; and sending F1 interface signaling to the IAB node for triggering the F1 connection establishment or migration of the child nodes of the IAB node.

Further, the receiving unit 1201 is further configured to receive a handover request sent by the source host, where the source host is a host before the IAB node is handed over; and sending a switching response to the source host, wherein the switching response carries the RRC reconfiguration message of the IAB node and is used for reconfiguring the IAB node.

Further, the IAB node is a top level migration node that is handed over to the target host; the receiving unit 1201 is further configured to receive an RRC reconfiguration complete message sent by the IAB node, where the RRC reconfiguration complete message is sent by the IAB node after reconfiguration is performed according to the RRC reconfiguration message.

Further, the IAB node is a non-top level migration node that is handed over to the target host; the receiving unit 1201 is further configured to receive an RRC reconfiguration complete message sent by a parent node of the IAB node, where the RRC reconfiguration complete message is sent to the parent node after the IAB node performs reconfiguration according to the RRC reconfiguration message, and the parent node is sent through an F1 connection with the target host.

Further, the number of the IAB nodes is multiple, and the number of the RRC reconfiguration message is multiple; and the switching response carries an RRC reconfiguration message sequence and is used for sequentially sending the plurality of RRC reconfiguration messages according to the RRC reconfiguration message sequence.

Further, the device also comprises: a first determining unit, configured to determine node hops between the plurality of IAB nodes and the target host; and sequencing the RRC reconfiguration messages of the IAB nodes in an ascending order according to the node hop number to obtain the RRC reconfiguration message sequence.

Further, the device also comprises: a second determining unit, configured to determine node hops between the plurality of IAB nodes and the target host; and sequencing the RRC reconfiguration messages of the IAB nodes in a descending order according to the node hop number to obtain the RRC reconfiguration message sequence.

The connection establishing device provided by the embodiment of the application receives an F1 connection establishing request accessed to a backhaul integrated IAB node, wherein a target host is a host to which the IAB node is to be switched; an F1 connection establishment request for requesting to establish an F1 connection between the IAB node and the target host; and sending an F1 connection establishment success indication and indication information to the IAB node, wherein the indication information is used for triggering F1 connection establishment or migration of the child nodes of the IAB node. Therefore, after the F1 connection of the IAB node is successfully established, the indication information can be sent to the child nodes of the IAB node, the F1 connection establishment or migration of the child nodes is triggered, and the new F1 connection establishment or migration of the IAB node and the descendant nodes thereof and the target host is realized.

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 in the form of a software functioning 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.

On the other hand, an embodiment of the present invention further provides a processor-readable storage medium, where a computer program is stored in the processor-readable storage medium, and the computer program is configured to enable a processor to execute the connection establishment method shown in the embodiment of fig. 1 in this application.

On the other hand, an embodiment of the present application further provides a processor-readable storage medium, where a computer program is stored in the processor-readable storage medium, and the computer program is configured to enable a processor to execute the connection establishment method shown in the embodiment of fig. 2 in the present 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 connection establishment method is applied to an access backhaul integrated IAB node, and comprises the following steps:

2. The connection establishing method according to claim 1, wherein the F1 connection establishing response message carries RRC signaling;

3. The connection setup method of claim 1, wherein the sending indication information to the sub-nodes of the IAB node comprises:

4. The connection setup method of claim 1, wherein the sending indication information to the sub-nodes of the IAB node comprises:

receiving F1 interface signaling sent by the target host;

5. The connection setup method of claim 1 wherein the IAB nodes comprise top level migration nodes or non-top level migration nodes.

6. The connection setup method according to claim 5, wherein the IAB node is a top level migration node that is handed over to the target host;

7. The connection establishing method according to claim 6, wherein the RRC reconfiguration message further carries a global cell identity CGI of the access node under the target host;

8. The connection establishing method according to claim 6, wherein the RRC reconfiguration message further carries information of a default channel and a default route between the target host and the IAB node;

9. The connection setup method according to claim 5, wherein the IAB node is a non-top migration node that is handed over to the target host;

reconfiguring the IAB node according to the RRC reconfiguration message;

and receiving the indication information sent by the parent node.

10. The method of claim 9, wherein after the reconfiguring the IAB node according to the RRC reconfiguration message, the method further comprises:

11. The connection setup method according to claim 8, characterized in that the default channel is a default backhaul radio link control, BH, RLC channel; the default route is a default backhaul adaptation protocol, BAP, identity route.

12. A method for connection establishment, the method being applied to a target host, the method comprising:

13. The method according to claim 12, wherein the sending F1 connection setup success indication and indication information to the IAB node comprises:

14. The method according to claim 12, wherein the sending F1 connection setup success indication and indication information to the IAB node comprises:

15. The method of claim 12, wherein before receiving the F1 connection setup request to access the backhaul all-in-one IAB node, the method further comprises:

receiving a switching request sent by a source host, wherein the source host is a host before the IAB node is switched;

16. The connection setup method of claim 15 wherein the IAB nodes comprise top level migration nodes or non-top level migration nodes.

17. The connection setup method of claim 16 wherein the IAB node is a top level migration node that is handed over to the target host;

the method further comprises the following steps:

18. The connection setup method of claim 16 wherein the IAB node is a non-top level migration node that is handed over to the target host;

the method further comprises the following steps:

19. The connection setup method according to claim 15, wherein the IAB nodes are plural in number, and the RRC reconfiguration message is plural in number;

20. The connection setup method according to claim 19, wherein before sending the handover response to the source host, further comprising:

21. The connection setup method according to claim 19, wherein before sending the handover response to the source host, further comprising:

22. An access backhaul integrated IAB node, comprising:

23. The IAB node of claim 22, wherein the F1 connection setup response message carries RRC signaling;

24. The IAB node of claim 22, wherein the sending an indication to a child node of the IAB node comprises:

25. The IAB node of claim 22, wherein the sending an indication to a child node of the IAB node comprises:

receiving F1 interface signaling sent by the target host;

26. The IAB node of claim 22, wherein the IAB node comprises a top level migration node or a non-top level migration node.

27. The IAB node of claim 26, wherein the IAB node is a top level migration node that is handed over to the target host;

28. The IAB node of claim 27, wherein the RRC reconfiguration message further carries a global cell identity CGI of the access node in the target host;

29. The IAB node of claim 27, wherein the RRC reconfiguration message further carries information of a default channel and a default route between the target host and the IAB node;

30. The IAB node of claim 26, wherein the IAB node is a non-top level migration node that is handed over to the target host;

reconfiguring the IAB node according to the RRC reconfiguration message;

and receiving the indication information sent by the parent node.

31. The IAB node of claim 30, wherein after the reconfiguring the IAB node according to the RRC reconfiguration message, further comprising:

32. The IAB node of claim 29, wherein the default channel is a default backhaul radio link control, BH, RLC channel; the default route is a default backhaul adaptation protocol, BAP, identity route.

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

34. The target host of claim 33, wherein sending an F1 connection setup success indication and indication information to the IAB node comprises:

35. The target host of claim 33, wherein sending an F1 connection setup success indication and indication information to the IAB node comprises:

36. The target host of claim 33, wherein before receiving the F1 connection setup request to access the backhaul all-in-one IAB node, the method further comprises:

37. The target host of claim 36, wherein the IAB nodes comprise top level migration nodes or non-top level migration nodes.

38. The target host of claim 37, wherein the IAB node is a top level migration node that is handed over to the target host;

the processor further performs the following operations:

39. The target host of claim 37, wherein the IAB node is a non-top level migration node that is handed over to the target host;

the processor further performs the following operations:

40. The target host of claim 36, wherein the IAB nodes are plural in number, and wherein the RRC reconfiguration message is plural in number;

41. The target host of claim 40, wherein before sending the handover response to the source host, further comprising:

42. The target host of claim 40, wherein before sending the handover response to the source host, further comprising:

43. A connection establishment apparatus, wherein the apparatus is applied to an access backhaul integrated IAB node, and the apparatus comprises:

44. A connection establishment apparatus, wherein the apparatus is applied to a target host, the apparatus comprising:

45. 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 11, or the method of any of claims 12 to 21.