CN112865943A

CN112865943A - Control information transmission method, electronic equipment and storage medium

Info

Publication number: CN112865943A
Application number: CN202110056990.0A
Authority: CN
Inventors: 王丽萍; 竺浩; 陈琳; 黄莹
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2021-01-15
Filing date: 2021-01-15
Publication date: 2021-05-28

Abstract

The embodiment of the application provides a transmission method of control information, electronic equipment and a storage medium, wherein the method comprises the following steps: receiving conditional handover configuration information sent by a second network node, wherein the conditional handover configuration information comprises at least one group of candidate cell CHO configuration information; and receiving conditional handover triggering indication information sent by the third network node, and selecting candidate cell CHO configuration information matched with the conditional handover triggering indication information according to the conditional handover triggering indication information to execute handover. According to the embodiment of the application, when the network changes the access node, the configuration information is accurately transmitted by adjusting the switching, so that the fast switching of the child nodes is realized, and the stability of the network can be improved.

Description

Control information transmission method, electronic equipment and storage medium

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a method for transmitting control information, an electronic device, and a storage medium.

Background

In the latest research topic of 5G, Integrated access and backhaul links (IABs) have many advantages, and intensive NR cells can be more flexibly deployed through wireless backhaul links and relay links, and at the same time, the network does not need to correspondingly increase intensive deployment of a transmission network. As shown in fig. 1, the basic topology of the IAB is an IAB node, where an access node supporting wireless access of a client UE and wirelessly returning a user plane or control plane packet becomes an IAB node, and the IAB node is composed of two parts, a Distributed Unit (DU) and a Mobile Termination (TM) logical function Unit. The node which provides wireless backhaul function for the IAB node and has UE link and core network access is called an IAB host, and includes two parts, DU and CU, where CU includes two parts, CU-Control Plane (CP) and CU-User Plane (UP), and is respectively a Control Plane to be changed and a User Plane. An IAB node may access another IAB node or an IAB host (donor) over the air. User plane or control plane data packets may be transmitted between access nodes over a wireless backhaul link. In the IAB network, if the IAB node changes the accessed IAB host, the configuration information of the IAB node needs to be updated.

Disclosure of Invention

An embodiment of the present application aims to provide a transmission method of control information, an electronic device, and a storage medium, which aim to implement accurate transmission of control information when an IAB node changes an access IAB host, control fast switching of subsequent child nodes of a network, and improve stability of the network.

In order to achieve the above object, an embodiment of the present application provides a method for transmitting control information, which is applied to a first network node, and the method includes: receiving conditional handover configuration information sent by a second network node, wherein the conditional handover configuration information comprises at least one group of candidate cell CHO configuration information; and receiving conditional handover triggering indication information sent by the third network node, and selecting candidate cell CHO configuration information matched with the conditional handover triggering indication information according to the conditional handover triggering indication information to execute handover.

In order to implement the above object, an embodiment of the present application further provides a method for transmitting control information, which is applied to a second network node, and the method includes: sending conditional handover configuration information to the first network node, wherein the conditional handover configuration information comprises at least one set of candidate cell CHO configuration information. In order to achieve the above object, an embodiment of the present application further provides a method for transmitting control information, which is applied to a third network node, and the method includes: receiving conditional handover configuration information sent by a second network node, and forwarding the conditional handover configuration information to a first network node, wherein the conditional handover configuration information comprises at least one group of candidate cell CHO configuration information;

and sending conditional handover triggering indication information to the first network node so that the first network node selects candidate cell CHO configuration information matched with the conditional handover triggering indication information to execute handover according to the conditional handover triggering indication information.

In order to achieve the above object, an embodiment of the present application further provides a method for transmitting control information, which is applied to a first network node, and the method includes: and receiving control information sent by the second network node through the RRC message, and executing switching according to the control information.

In order to achieve the above object, an embodiment of the present application further provides a method for transmitting control information, which is applied to a second network node, and the method includes: sending control information to a first network node through an RRC message so that the first network node performs handover according to the control information.

According to the embodiment of the application, the conditional handover configuration information of the second network node is received in advance, the conditional handover configuration information can comprise multiple groups of candidate cell CHO configuration information, when the conditional handover triggering indication information sent by the third network node is received, the candidate cell CHO configuration information matched with the conditional handover triggering indication information is selected according to the conditional handover triggering indication information to update the configuration, the nodes in the network are rapidly switched, the accuracy of control information transmission is improved, and the stability of the network can be enhanced.

Drawings

Fig. 1 is a basic topology structure diagram of an IAB provided in an embodiment of the present application;

fig. 2 is a flowchart of a method for transmitting control information according to an embodiment of the present application;

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

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

fig. 5 is an exemplary diagram of a transmission method of control information according to an embodiment of the present application;

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

fig. 7 is a flowchart of another transmission method of control information according to an embodiment of the present application;

fig. 8 is a diagram illustrating another example of a transmission method of control information according to an embodiment of the present application;

fig. 9 is a topology structure diagram of an IAB network according to an embodiment of the present application;

fig. 10 is a block diagram of another IAB network topology according to an embodiment of the present application;

fig. 11 is a block diagram of another IAB network topology according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a transmission apparatus for control information according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a transmission apparatus for control information according to an embodiment of the present application;

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

fig. 15 is a diagram illustrating a structure of a transmission apparatus for control information according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the following description, suffixes such as "module", "part", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no peculiar meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.

In NR-Release16, in order to improve the robustness of the UE in the mobility process, a basic mobility scheme is enhanced, and a Conditional HandOver (CHO), that is, a Conditional HandOver scheme, is proposed. In the basic mobility scheme, the source base station only selects one target base station according to the measurement information of the UE and sends a handover request, and also only receives a handover response of the target base station (the handover response includes configuration information required by the UE to access the target base station), and then the source base station sends the configuration information required by the UE to access the target base station to the UE through a handover command. And the UE accesses the target base station after receiving the switching command and changes the data path (from the source side to the target side), thereby completing the switching process. In the CHO, the source base station may select a plurality of candidate target base stations according to the measurement information of the UE and send a plurality of handover requests, and also may receive handover responses of the plurality of target base stations (the handover responses include configuration information required for the UE to access the target base stations), and then the source base station may include condition configuration information required for the UE to access each of the candidate target base stations and an execution condition for triggering the UE to perform the CHO handover, and send the result to the UE through a handover command. After receiving the handover command, when a certain CHO trigger condition is satisfied, the UE performs access to a candidate base station satisfying the trigger condition and performs data path change (from the source side to the target side), thereby completing the handover procedure. The application provides a scheme for supporting conditional switch configuration of a child node of a Migration-IAB in an IAB scene.

Fig. 2 is a flowchart of a control information transmission method provided in an embodiment of the present application, where the embodiment of the present application is applicable to a situation where an IAB node updates a configuration of a child node after handover, and the method may be executed by a control information transmission apparatus in the embodiment of the present application, where the apparatus may be implemented in a software and/or hardware manner, and may be generally integrated into a first network node, where the first network node may specifically be a child node of the IAB node that performs handover, and the method in the embodiment of the present application specifically includes the following steps:

step 110, receiving conditional handover configuration information sent by the second network node, where the conditional handover configuration information includes at least one set of candidate cell CHO configuration information.

The second network node may be a host node of an IAB node that performs handover, the conditional handover configuration information may be configuration information that is transmitted in advance to support conditional handover, the configuration information may include information for performing the IAB node handover, the candidate cell CHO configuration information may be information for controlling the first network node to perform handover, and the IAB node that performs handover may be handed over to a plurality of different host nodes, so the conditional handover configuration information may include a plurality of sets of candidate cell CHO configuration information, and each set of candidate cell CHO configuration information may correspond to one IAB host node that can be an IAB node.

In this embodiment of the present application, the first network node may receive conditional handover configuration information sent by the second network node, where the conditional handover configuration information may include multiple sets of candidate cell CHO configuration information, and further, the first network node may store the received sets of candidate cell CHO configuration information to perform a subsequent IAB node handover process.

And step 120, receiving conditional handover triggering indication information sent by the third network node, and selecting candidate cell CHO configuration information matched with the conditional handover triggering indication information according to the conditional handover triggering indication information to execute handover.

The third network node may be a parent node of the first network node, and may be a node where migration occurs in the IAB network, and the conditional handover trigger indication information may be information that triggers the first network node to perform configuration update.

Specifically, when the first network node receives the conditional handover trigger indication information sent by the third network node, a group of candidate cell CHO configuration information may be selected from a plurality of groups of candidate cell CHO configuration information obtained in advance to perform handover, and the manner of selecting the candidate cell CHO configuration information may include direct indication of the conditional handover trigger indication information or automatic selection by the first network node according to a communication state with the third network node.

According to the embodiment of the application, the conditional handover configuration information of the second network node is received in advance, the conditional handover configuration information can include multiple groups of candidate cell CHO configuration information, and when the conditional handover triggering indication information sent by the third network node is received, the candidate cell CHO configuration information is selected according to the conditional handover triggering indication information to execute handover, so that the fast handover of the nodes in the IAB network is realized, the accuracy of control information transmission is improved, and the stability of the network can be enhanced.

Further, on the basis of the embodiment of the above application, the candidate cell CHO configuration includes one or more of the following: the method comprises the steps of a default uplink return wireless link control channel default UL-BH-RLC-channel, a default uplink return adaptation protocol route number default UL-BAP-routing ID, a network protocol address IP address, return adaptation protocol route entry information BAP routing entries, a host distributed unit number Donor-DU ID, a host centralized unit number Donor-CU ID and information related to candidate cell access.

The condition switching triggering indication information comprises any combination or at least one of the following information:

the number of the host distributed unit Donor-DU ID, the number of the host centralized unit DONOR-CU ID, the address of the back transmission adaptation protocol BAP of the host distributed unit and the switching indication between the host distributed units Donor-CU.

Fig. 3 is a flowchart of another method for transmitting control information according to an embodiment of the present application, where the embodiment of the present application is applicable to a situation where an IAB node updates a configuration of a child node after handover, and the method may be executed by a device for transmitting control information according to the embodiment of the present application, where the device may be implemented in a software and/or hardware manner, and may be generally integrated into a second network node, where the second network node may specifically be a Donor node of the IAB node that performs handover, and the method according to the embodiment of the present application specifically includes the following steps:

step 210, sending conditional handover configuration information to the first network node, wherein the conditional handover configuration information comprises at least one set of candidate cell CHO configuration information.

In this embodiment of the present application, the third network node sends conditional handover configuration information to the first network node, where the conditional handover configuration information may include multiple sets of candidate cell CHO configuration information, and further, the first network node may store the received sets of candidate cell CHO configuration information to perform a subsequent IAB node handover process.

Further, on the basis of the embodiment of the foregoing application, the candidate cell CHO configuration information includes any combination or at least one of the following: the method comprises the steps of a default uplink return wireless link control channel default UL-BH-RLC-channel, a default uplink return adaptation protocol route number default UL-BAP-routing ID, a network protocol address IP address, return adaptation protocol route item updating information BAP routing entries, a host distributed unit number Donor-DU ID, a host centralized unit number Donor-CU ID and information related to candidate cell access.

Fig. 4 is a flowchart of another method for transmitting control information according to an embodiment of the present application, where the embodiment of the present application is applicable to a situation where an IAB node updates a configuration of a child node after handover, and the method may be executed by a device for transmitting control information according to the embodiment of the present application, where the device may be implemented in a software and/or hardware manner, and may be generally integrated into a third network node, where the third network node may specifically be an IAB node that has undergone handover, and the method according to the embodiment of the present application specifically includes the following steps:

step 310, receiving conditional handover configuration information sent by the second network node, and forwarding the conditional handover configuration information to the first network node, where the conditional handover configuration information includes at least one set of candidate cell CHO configuration information.

Specifically, the third network node may be a forwarding node of the conditional handover configuration information, and when the third network node receives the conditional handover configuration information sent by the second network node, the third network node may directly forward the conditional handover configuration information to the first network node, where the conditional handover configuration information may include multiple sets of candidate cell CHO configuration information, and further, the first network node may store the received sets of candidate cell CHO configuration information to perform a subsequent IAB node handover process.

And step 320, sending the conditional handover triggering indication information to the first network node, so that the first network node selects the candidate cell CHO configuration information matched with the conditional handover triggering indication information according to the conditional handover triggering indication information to execute the handover.

In this embodiment of the present application, when the third network node sends the conditional handover trigger indication information to the first network node, the first network node may be triggered to select one set of candidate cell CHO configuration information from multiple sets of candidate cell CHO configuration information obtained in advance to perform handover, and the candidate cell CHO configuration information may be selected in a manner of selecting the candidate cell CHO configuration information, where the candidate cell CHO configuration information is matched with the conditional handover trigger indication information.

In an exemplary implementation, fig. 5 is an exemplary diagram of a group of control information transmission methods provided in an embodiment of the present application, and referring to fig. 5, a second network node sends conditional handover configuration information, where the conditional handover configuration information includes multiple groups of candidate cell CHO configuration information, the conditional handover configuration information is transmitted to a first network node through a third network node, and the third network node sends conditional handover trigger indication information to the first network node after performing handover, so that the first network node performs handover according to pre-obtained candidate cell CHO configuration information.

Fig. 6 is a flowchart of another method for transmitting control information according to an embodiment of the present application, where the embodiment of the present application is applicable to a situation where an IAB node updates a configuration of a child node after handover, and the method may be executed by a device for transmitting control information according to the embodiment of the present application, where the device may be implemented in a software and/or hardware manner, and may be generally integrated into a first network node, where the first network node may specifically be a child node of the IAB node that performs handover, and the method according to the embodiment of the present application specifically includes the following steps:

step 410, receiving the target path configuration update information sent by the second network node through the RRC message, and performing an update according to the target path configuration update information.

In the embodiment of the application, the target path configuration update information may be information for controlling the first network node to perform handover, the second network node may directly send the target path configuration update information to the first network node through an RRC message, and the first network node may update its own configuration information according to the target path configuration update information.

Further, on the basis of the embodiment of the above application, the target path configuration update information includes at least one of the following:

the configuration of a return wireless link control channel BH RLC channel and the configuration of a return adaptation protocol routing list BAP routing entries.

Fig. 7 is a flowchart of another method for transmitting control information according to an embodiment of the present application, where the embodiment of the present application is applicable to a situation where an IAB node updates a configuration of a child node after handover, and the method may be executed by a device for transmitting control information according to the embodiment of the present application, where the device may be implemented in a software and/or hardware manner, and may be generally integrated into a second network node, where the second network node may specifically be a Donor node of the IAB node that performs handover, and the method according to the embodiment of the present application specifically includes the following steps:

step 510, sending the target path configuration update information to the first network node through an RRC message, so that the first network node performs updating according to the target path configuration update information.

Specifically, the second network node may directly send the target path configuration update information to the first network node through an RRC message, and control the first network node to perform configuration update according to the target path configuration update information.

In an exemplary implementation manner, fig. 8 is an exemplary diagram of another transmission method of control information provided in an embodiment of the present application, and referring to fig. 8, after a third network node performs handover, target path configuration update information may be sent to a first network node by an RRC message between second network nodes, and the first network node performs update according to the received target path configuration update information.

In an exemplary implementation manner, an embodiment of the present application provides a method for transmitting control information, where the method may be applicable to a case where indication information is transmitted between base stations, and the method may be performed by a device for transmitting control information in the embodiment of the present application, where the device may be implemented in a software and/or hardware manner, and may be generally integrated in a fourth network node, where the node may specifically be a base station, and the method includes: and sending indication information to the fifth network node, wherein the indication information comprises an established SRB3 indication or an un-established SRB3 indication.

In another exemplary embodiment, an embodiment of the present application provides a method for transmitting control information, where the method may be applied to a case where indication information is transmitted between base stations, and the method may be performed by a device for transmitting control information in the embodiment of the present application, where the device may be implemented in a software and/or hardware manner, and may be generally integrated in a fifth network node, where the node may specifically be a base station, and the base station and the fourth network node are not the same base station, and the method includes: and receiving indication information sent by the fourth node, wherein the indication information comprises an established SRB3 indication or an un-established SRB3 indication.

In an exemplary implementation, fig. 9 is a topology block diagram of an IAB network provided in an embodiment of the present application, and referring to fig. 9, an IAB-node1 and an IAB-node2 are connected to a Donor-CU through a Donor-DU1, a migration-IAB-node3 accesses to the IAB network through an IAB-node1, and a desendent-IAB-nodes or a UE connected to the migration-IAB-node3 accesses to the IAB network with a migration-IAB-node3 as a parent node. The procedure of the occurrence of the handover in the IAB network may include: Migraion-IAB-node3 performs an RLF Recovery scenario in a mobile scenario or due to RLF occurring with a link between a parent node, which is changed from IAB-node1 to IAB-node 2. Namely Migraion-IAB-node3 is switched to IAB network by IAB-node 2. Subsequently, Despendent-IAB-nodes attached to Migraion-IAB-node3 migrated with Migraion-IAB-node 3.

In the above Intra-Donor-DU migration scenario, the dependent-IAB-nodes can maintain the connection with the migration-IAB-node without triggering CHO. As the target path sends change, BH RLC channels and BAP routing entries of the dependent-IAB-nodes need to be updated. The specific method can comprise the following steps:

after the Migration-IAB-node3 completes the Intra-Donor-DU Migration, the Donor-CU only needs to reconfigure BH RLC channels and BAP routing entries of the dependent-IAB-nodes through RRC message, and the dependent-IAB-nodes complete configuration updating.

In an exemplary implementation manner, fig. 10 is a block diagram of another IAB network topology provided in this embodiment of the present application, and referring to fig. 10, an IAB-node1 is connected to a Donor-CU through a Donor-DU1, and an IAB-node2 is connected to the Donor-CU through a Donor-DU 2. Migraion-IAB-node3 accesses to IAB network through IAB-node1, Descriptent-IAB-nodes or UE connected with Migraion-IAB-node3 accesses to IAB network by using Migraion-IAB-node3 as father node. The procedure of the occurrence of the handover in the IAB network may include: Migraion-IAB-node3 performs an RLF Recovery scenario in a mobile scenario or due to RLF occurring with a link between a parent node, which is changed from IAB-node1 to IAB-node 2. Namely Migraion-IAB-node3 is switched to IAB network by IAB-node 2. Subsequently, Despendent-IAB-nodes attached to Migraion-IAB-node3 migrated with Migraion-IAB-node 3.

For the inter-Donor-DU migration scenario in the network topology shown in fig. 10, due to the change of the Donor-DU, default UL BH RLC channel, default UL BAP routing ID, IP address, BH RLC channels, and BAP routing entries of the default-IAB-nodes need to be updated. The specific method comprises the following steps:

the method comprises the following steps: after the handover-IAB-node 3 completes the Inter-Donor-DU handover, the Donor-CU can perform reconfiguration on the default UL BH RLC channel, the default UL BAP routing ID, the IP address, the BH RLC channels and the BAP routing entries of the default-IAB-node, so that the default-IAB-node completes the handover.

The second method comprises the following steps: when the condition switching CHO is supported in the IAB network, updating and reassembling default UL BH RLC channel, default UL BAP routing ID, IP address, BH RLC channels and BAP routing entries of the default-IAB-node can be used as a part of CHO configuration and sent to the default-IAB-node before the Inter-Donor-DU routing is carried out on the Migration-IAB 3. It should be noted that, since a CU may include multiple Donor-DUs, and the Migration-IAB-node3 may migrate to an IAB-node under any Donor-DU, the updated default UL BH RLC channel, default UL BAP routing ID, IP address, BH RLC channel, and BAP routing entries for the Descement-IAB-nodes under each candidate Donor-DU, and the Donor-DU ID and the corresponding Migration-IAB-node3 cell configuration information should be included in the CHO handover command sent by the Donor-CU to the Descement-IAB-nodes. And after the Descement-IAB-nodes receive the CHO switching command, caching and waiting for the CHO condition switching triggering indication. Subsequently, after Migration of Migration-IAB-node3 to target IAB-node2, Migration-IAB-node3 sends a CHO condition handover trigger indication to descnent-IAB-nodes through DL MAC CE or DL BAP Control PDU, instructing the descnent-IAB-nodes to execute CHO configuration. The CHO conditional handover trigger indication includes a Donor-DU ID (i.e., BAP address of the Donor-DU), i.e., a Donor DU ID where the target IAB-node2 to which the current Migration-IAB-node3 is migrated is located.

And finally, after the Descement-IAB-nodes receive the CHO conditional switch triggering indication, immediately selecting the candidate cell CHO configuration information matched with the conditional switch triggering indication information and executing the CHO switch. Namely, the Donor-DU of the selected candidate cell CHO configuration corresponds to the Donor-DU in the CHO conditional handover triggering indication information one by one. The Despendent-IAB-nodes simultaneously take effect of default UL BH RLC channel, default UL BAP routing ID, IP address, BH RLC channels and BAP routing entries updating configuration in the CHO configuration information. And the CHO condition switching is completed by replying an RRC reconfiguration completion message to the target Donor-CU.

In an exemplary implementation manner, fig. 11 is a block diagram of another IAB network topology provided in this embodiment of the present application, and referring to fig. 11, an IAB-node1 is connected to a Donor-CU1 through a Donor-DU1, and an IAB-node2 is connected to a Donor-CU2 through a Donor-DU 2. In an initial state, Migraion-IAB-node3 accesses to an IAB network through IAB-node1, and Descriptent-IAB-nodes or UE connected with Migraion-IAB-node3 accesses to the IAB network by taking Migraion-IAB-node3 as a parent node. For the inter-Donor-DU migration scenario in the network topology shown in fig. 11, the specific flow includes, due to the change of the Donor-DU: Migraion-IAB-node3 performs RLF Recovery in a mobile scenario or due to RLF occurring on a link with a parent node, and the parent node is changed from IAB-node1 to IAB-node2, that is, Migraion-IAB-node3 is changed to access the IAB network from IAB-node 2. Wherein IAB-node2 and IAB-node1 belong to different Donor-CU, i.e. Migraion-IAB-node3 has undergone inter-CU migration. Subsequently, Despendent-IAB-nodes attached to Migraion-IAB-node3 migrated with Migraion-IAB-node 3. In this process, because the paths between the Migration-IAB-node3 and the route from the destination-IAB-nodes to the Donor-CU are changed and the Donor-CU and the Donor-DU are also changed, for the inter-Donor-CUlocation scenario, the default UL BH RLC channel, the default UL BAP routing ID, the IP address, the BAP Mapping configuration, the BAP address and the BAP routing format of the destination-IAB-nodes need to be updated due to the change of the Donor-CU and the Donor-DU. The specific method comprises the following steps:

the method comprises the following steps: the Donor-CU2 may perform the reconfiguration of default UL BH RLC channel, default UL BAP routing ID, IP address, BH RLC channels and BAP routing entries of the default-IAB-node after the handover-IAB-node 3 completes the Inter-Donor-DU handover.

The second method comprises the following steps: considering that the Descriptent-IAB-nodes supports Conditional Handover (CHO), for default UL BH RLC channel, default UL BAP routing ID, IP address, BAP Mapping configuration, BAP address and BAP routing information update configuration of the Descriptent-IAB-nodes can be sent to the Descriptent-IAB-nodes before the Migration-IAB3 performs the Inter-Donor-DU Migration as a part of the CHO configuration. It should be noted that, since there may be multiple target candidate CUs, and each CU may include multiple external node-DUs, and the Migration-IAB-node3 may migrate to any node-CU or IAB-node under node-DU, the CHO handover command sent by the node-CU to the discovery-IAB-nodes should include update configuration of each candidate node-CU, node-DU, node UL BAP routing ID, IP address, BAP Mapping configuration, BAP address, and BAP routing information, and the corresponding information of node-CU ID, node-DU ID (the node-CU ID may be IP address of the node-CU CP or IP address of the node-UP, i.e., small node-DU access area 3). And after the Descement-IAB-nodes receive the CHO switching command, caching and waiting for the CHO condition switching triggering indication.

Subsequently, after Migration of Migration-IAB-node3 to target IAB-node2, Migration-IAB-node3 sends a CHO condition handover trigger indication to descnent-IAB-nodes through DL MAC CE or DL BAP Control PDU, instructing the descnent-IAB-nodes to execute CHO configuration. The CHO conditional handover trigger instruction includes a Donor-DU ID (the Donor-DU ID may be an IP address of a Donor-CU CP or an IP address of a Donor-CU UP), which is a BAP address of the Donor-DU, that is, a Donor-DU ID where a target IAB-node2 to which the Migration of the Migration-IAB-node3 currently exists.

And finally, after the Descement-IAB-nodes receive the CHO conditional switch triggering indication, immediately selecting the candidate cell CHO configuration information matched with the conditional switch triggering indication information and executing the CHO switch. Namely, the Donor-CU ID and the Donor-DU of the selected candidate cell CHO configuration correspond to the Donor-CU ID and the Donor-DU in the CHO conditional handover triggering indication information one by one. The Despendent-IAB-nodes simultaneously take effect of default UL BH RLC channel, default UL BAP routing ID, IP address, BAP Mapping configuration, BAP address and BAP routing information updating configuration in the CHO configuration information. And the CHO condition switching is completed by replying an RRC reconfiguration completion message to the target Donor-CU.

Fig. 12 is a schematic structural diagram of a control information transmission apparatus according to an embodiment of the present application, which is capable of executing a control information transmission method according to any embodiment of the present application, and includes functional modules corresponding to the execution method and beneficial effects. The apparatus may be implemented by software and/or hardware, and may be integrated in a first network node, where the first network node may specifically be a child node of an IAB node where handover occurs, and specifically includes: a configuration receiving module 61 and a trigger receiving module 62.

A configuration receiving module 61, configured to receive conditional handover configuration information sent by a second network node, where the conditional handover configuration information includes at least one set of candidate cell CHO configuration information.

And a trigger receiving module 62, configured to receive conditional handover trigger indication information sent by the third network node, and select candidate cell CHO configuration information matching the conditional handover trigger indication information according to the conditional handover trigger indication information to perform handover.

According to the embodiment of the application, the configuration receiving module receives the conditional handover configuration information of the second network node in advance, the conditional handover configuration information can include multiple groups of candidate cell CHO configuration information, and the trigger receiving module selects the candidate cell CHO configuration information to execute handover according to the conditional handover trigger indication information when receiving the conditional handover trigger indication information sent by the third network node, so that the rapid handover of the nodes in the IAB network is realized, the accuracy of control information transmission is improved, and the stability of the network can be enhanced.

Further, on the basis of the embodiment of the above application, the candidate cell CHO configuration in the apparatus includes any combination or at least one of the following: the method comprises the steps of a default uplink return wireless link control channel default UL-BH-RLC-channel, a default uplink return adaptation protocol route number default UL-BAP-routing ID, a network protocol address IP address, return adaptation protocol route entry information BAP routing entries, a host distributed unit number Donor-DU ID, a host centralized unit number Donor-CU ID and information related to candidate cell access.

Further, on the basis of the embodiment of the above application, the condition switching triggering indication information in the apparatus includes any combination or at least one of the following: the number of the host distributed unit Donor-DU ID, the number of the host centralized unit DONOR-CU ID, the address of the back transmission adaptation protocol BAP of the host distributed unit and the switching indication between the host distributed units Donor-CU.

Fig. 13 is a schematic structural diagram of a control information transmission apparatus according to an embodiment of the present application, which is capable of executing a control information transmission method according to any embodiment of the present application, and includes functional modules corresponding to the execution method and beneficial effects. The apparatus may be implemented by software and/or hardware, and may be integrated in a second network node, where the second network node may specifically be a Donor node of an IAB node where handover occurs, and specifically includes: a configuration sending module 71, configured to send conditional handover configuration information to the first network node, where the conditional handover configuration information includes at least one set of candidate cell CHO configuration information.

Further, on the basis of the embodiment of the above application, the candidate cell CHO configuration information in the apparatus includes any combination or at least one of the following: the method comprises the steps of a default uplink return wireless link control channel default UL-BH-RLC-channel, a default uplink return adaptation protocol route number default UL-BAP-routing ID, a network protocol address IP address, return adaptation protocol route item updating information BAP routing entries, a host distributed unit number Donor-DU ID, a host centralized unit number Donor-CU ID and information related to candidate cell access.

Fig. 14 is a schematic structural diagram of a control information transmission apparatus according to an embodiment of the present application, which is capable of executing a control information transmission method according to any embodiment of the present application, and includes functional modules corresponding to the execution method and beneficial effects. The apparatus may be implemented by software and/or hardware, and may be integrated in a third network node, where the third network node may specifically be an IAB node where handover occurs, and specifically includes: a configuration forwarding module 81 and a trigger sending module 82.

A configuration forwarding module 81, configured to receive conditional handover configuration information sent by a second network node, and forward the conditional handover configuration information to a first network node, where the conditional handover configuration information includes at least one set of candidate cell CHO configuration information.

A trigger sending module 82, configured to send conditional handover trigger indication information to the first network node, so that the first network node selects candidate cell CHO configuration information matching the conditional handover trigger indication information according to the conditional handover trigger indication information to perform handover.

Further, on the basis of the embodiment of the above application, the condition switching triggering indication information in the apparatus is any combination or at least one of the following: the number of the host distributed unit Donor-DU ID, the number of the host centralized unit DONOR-CU ID, the address of the back transmission adaptation protocol BAP of the host distributed unit and the switching indication between the host distributed units Donor-CU.

In an exemplary implementation manner, fig. 15 is a structural example diagram of a transmission apparatus for control information according to an embodiment of the present application, and referring to fig. 15, a first network node may include an information receiving module 91, which may be implemented by software and/or hardware, where the information receiving module 91 is configured to receive target path configuration update information sent by a second network node through an RRC message, and perform updating according to the target path configuration update information. The second network node may include an information sending module 92, and the information sending module 92 is configured to send target path configuration update information to the first network node through an RRC message, so that the first network node performs updating according to the target path configuration update information. Further, the target path configuration update information in the module includes at least one of the following: configuration of a backhaul radio link control channel BH RLC channel and configuration of a backhaul adaptation protocol routing list BAP routing entries.

The transmission device for the control information can execute the method provided by any implementation of the application, and has the corresponding functional modules and beneficial effects of the execution method. The apparatus, which may be implemented by software and/or hardware, may be integrated in a fourth network node, the apparatus comprising: and an indication sending module, configured to send indication information to the fifth network node, where the indication information includes an indication that the SRB3 is established or an indication that the SRB3 is not established.

The transmission device for the control information can execute the method provided by any implementation of the application, and has the corresponding functional modules and beneficial effects of the execution method. The apparatus, which may be implemented by software and/or hardware, may be integrated in a fifth network node, the apparatus comprising: and an indication receiving module, configured to receive indication information sent by the fourth node, where the indication information includes an indication that the SRB3 is established or an indication that the SRB3 is not established. It is understood that one base station may include only an indication sending module or an indication receiving module, or may include both the indication sending module and the indication receiving module.

Fig. 16 is a schematic structural diagram of an electronic device provided in an embodiment of the present application, and referring to fig. 16, the electronic device includes a processor 50, a memory 51, an input device 52, and an output device 53; the number of processors 50 in the device may be one or more, and one processor 50 is taken as an example in fig. 16; the device processor 50, the memory 51, the input device 52, and the output device 53 may be connected by a bus or other means, and the bus connection is exemplified in fig. 16.

The memory 51 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, and modules, such as the modules corresponding to the transmission device of the control information in the embodiment of the present application (the configuration receiving module 61 and the trigger receiving module 62, or the configuration transmitting module 71, or the configuration forwarding module 81 and the trigger transmitting module 82). The processor 50 executes various functional applications of the device and data processing by executing software programs, instructions, and modules stored in the memory 51, that is, implements the software installation method described above.

The memory 51 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 51 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 51 may further include memory located remotely from the processor 50, which may be connected to the device over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The input device 52 is operable to receive input numeric or character information and to generate key signal inputs relating to user settings and function controls of the apparatus. The output device 53 may include a display device such as a display screen.

Embodiments of the present application also provide a storage medium containing computer-executable instructions, which when executed by a computer processor, perform a method for transmitting control information, the method including:

receiving conditional handover configuration information sent by a second network node, wherein the conditional handover configuration information comprises at least one group of candidate cell CHO configuration information;

and receiving conditional handover triggering indication information sent by the third network node, and selecting candidate cell CHO configuration information matched with the conditional handover triggering indication information according to the conditional handover triggering indication information to execute handover.

Alternatively, the first and second electrodes may be,

sending conditional handover configuration information to a first network node, wherein the conditional handover configuration information comprises at least one set of candidate cell CHO configuration information;

in the alternative to this, either,

receiving conditional handover configuration information sent by a second network node, and forwarding the conditional handover configuration information to a first network node, wherein the conditional handover configuration information comprises at least one group of candidate cell CHO configuration information;

Of course, the storage medium provided by the embodiment of the present invention contains computer-executable instructions, and the computer-executable instructions are not limited to the operations of the method described above, and may also perform related operations in the software installation method provided by any embodiment of the present invention.

From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.

It should be noted that, in the embodiment of the above search apparatus, each included unit and module are merely divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.

One of ordinary skill in the art will appreciate that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof.

In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.

The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, and are not to be construed as limiting the scope of the invention. Any modifications, equivalents and improvements which may occur to those skilled in the art without departing from the scope and spirit of the present invention are intended to be within the scope of the claims.

Claims

1. A method for transmitting control information, the method being applied to a first network node, the method comprising:

2. The method of claim 1, wherein the candidate cell CHO configuration comprises any combination or at least one of:

the method comprises the steps of a default uplink return wireless link control channel default UL-BH-RLC-channel, a default uplink return adaptation protocol route number default UL-BAP-routing ID, a network protocol address IP address, return adaptation protocol route entry information BAP routing entries, a host distributed unit number Donor-DU ID, a host centralized unit number Donor-CU ID and information related to candidate cell access.

3. The method according to claim 1, wherein the conditional handover trigger indication information includes at least one or any combination of the following:

4. A method for transmitting control information, the method being applied to a second network node, the method comprising:

sending conditional handover configuration information to the first network node, wherein the conditional handover configuration information comprises at least one set of candidate cell CHO configuration information.

5. The method according to claim 4, wherein the candidate cell CHO configuration information comprises any combination or at least one of:

6. A method for transmitting control information, the method being applied to a third network node, the method comprising:

7. The method according to claim 6, wherein the candidate cell CHO configuration information comprises any combination or at least one of:

8. The method according to claim 6, wherein the conditional handover trigger indication information includes at least one of any combination of the following:

9. A method for transmitting control information, the method being applied to a first network node, the method comprising:

and receiving target path configuration updating information sent by the second network node through an RRC message, and executing updating according to the target path configuration updating information.

10. The method of claim 9, wherein the target path configuration update information comprises at least one of:

11. A method for transmitting control information, the method being applied to a second network node, the method comprising:

and sending target path configuration updating information to the first network node through an RRC message so that the first network node executes updating according to the target path configuration updating information.

12. The method of claim 11, wherein the control information comprises at least one of:

configuration of a backhaul radio link control channel BH RLC channel and configuration of a backhaul adaptation protocol routing list BAP routing entries.

13. A method for transmitting control information, the method being applied to a fourth network node, the method comprising:

and sending indication information to the fifth network node, wherein the indication information comprises an established SRB3 indication or an un-established SRB3 indication.

14. A method for transmitting control information, applied to a fifth network node, the method comprising:

and receiving indication information sent by the fourth node, wherein the indication information comprises an established SRB3 indication or an un-established SRB3 indication.

15. An electronic device, characterized in that the electronic device comprises at least:

one or more processors;

a memory for storing one or more programs,

when the one or more programs are executed by a processor by the one or more processors, cause the one or more processors to implement the transmission method of control information according to any one of claims 1-14.

16. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a method of transmission of control information according to any one of claims 1 to 14.