WO2023226663A1

WO2023226663A1 - Communication method and communication apparatus

Info

Publication number: WO2023226663A1
Application number: PCT/CN2023/090323
Authority: WO
Inventors: 朱世超; 孙飞; 朱元萍
Original assignee: 华为技术有限公司
Priority date: 2022-05-26
Filing date: 2023-04-24
Publication date: 2023-11-30
Also published as: CN117177316A

Abstract

Provided in the present application are a communication method and a communication apparatus. The method comprises: after a first node accesses a first cell, a first network device sending first resource configuration information to the first node, wherein the first resource configuration information indicates a resource configuration corresponding to the first node after the first node is switched to a neighboring cell of the first cell, and the first cell is any one of cells corresponding to the first network device. If the first node is switched to a certain neighboring cell among neighboring cells of the first cell in the future, the first node can directly enable a corresponding resource configuration to take effect, such that compared with the manner of issuing resource configuration information after a target cell is determined, the method can alleviate the problem of the contradiction between the quick mobility of a migration node and a certain duration required for issuing the resource configuration information; and compared with the manner of issuing the resource configuration information after the migration node is migrated to the target cell, the method can alleviate the problem of data transmission interruption.

Description

Communication method and communication device

This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on May 26, 2022, with application number 202210597044.1 and application name "Communication Method and Communication Device", the entire content of which is incorporated into this application by reference.

Technical field

The present application relates to the field of communication, and more specifically, to communication methods and communication devices in the field of communication.

Background technique

In an integrated access and backhaul (IAB) network, when the IAB-node moves and triggers a handover of the cell currently accessed by the mobile terminal (MT) of the IAB-node, IAB-donor (the IAB-donor corresponding to the cell currently accessed by the IAB MT before the cell handover occurs or the IAB-donor corresponding to the cell currently accessed by the IAB MT after the cell handover is completed) needs to report to the distributed unit of the IAB-node ( distributed unit (DU) delivers the resource configuration corresponding to IAB-DU3 after the handover of the cell currently accessed by the IAB MT.

Contents of the invention

The present application provides a communication method and communication device. Compared with issuing resource configuration information after determining the target cell, this method can improve the rapid mobility of the migration node and the time required for the delivery of resource configuration information. The conflicting problem; compared with issuing resource configuration information after the migration node migrates to the target cell, this method can improve the problem of data transmission interruption.

In a first aspect, a communication method is provided, including: after a first network device (which can also be a module in the first network device, such as a chip) connects the first node to the first cell, the first network device sends a message to the first network device. The first node sends first resource configuration information, and the first resource configuration information indicates the resource configuration corresponding to the first node after switching to a neighboring cell of the first cell, and the first cell is the Any one of the cells corresponding to the first network device.

Based on the above technical solution, after the migration node initially accesses or switches to a certain cell, the network equipment corresponding to the cell sends the migration node the following information. After the migration node switches to one or more potential neighboring cells of the cell in the future, the The resource configuration corresponding to the migration node. Later, if the migration node switches to one of the above potential neighbor cells in the future, the migration node can directly take effect with the corresponding resource configuration. Compared with after determining the target cell This method can improve the contradiction between the rapid mobility of the migrating node and the time required for the resource configuration information to be issued by then issuing the resource configuration information; compared with issuing the resource configuration information after the migrating node has migrated to the target cell, This method can improve the problem of data transmission interruption.

With reference to the first aspect, in some implementations of the first aspect, the first resource configuration information also indicates the resource configuration corresponding to the first node after accessing the first cell.

Based on the above technical solution, if the first node initially accesses the first cell, the first node may not know the resource configuration that it can adopt after accessing the first cell. In order to avoid this situation, the first node may The resource configuration information indicates to the first node the resource configuration that the first node can adopt after accessing the first cell, so that when the first node is not clear about the resource configuration that it can adopt after accessing the first cell, it can Validate the resource configuration that the user can adopt after accessing the first cell according to the first resource configuration information.

In addition, by indicating the resource configuration corresponding to the first node after accessing the first cell through the first resource configuration information, the following problem can also be improved: assuming that the first node switches from the previous cell to the first cell, if the first node If the node moves too fast when moving from the previous cell to the first cell, it is possible that the first node moves out of the previous cell before successfully receiving the resource configuration that can be adopted after switching to the neighbor cell of the previous cell. In this case, after the first node switches to the first cell, it cannot determine the resource configuration that it can adopt after accessing the first cell.

Faced with this problem, by using the first resource configuration information to indicate the corresponding resource configuration of the first node after accessing the first cell, the first node can use resources that can be used after it has not successfully received the handover to the neighbor cell of the previous cell. When the configuration is moved out of the previous cell, the resource configuration that can be adopted after accessing the first cell can be validated according to the first resource configuration information.

Combining the first aspect and the above implementation manner, in some implementation manners of the first aspect, the first node is an integrated access backhaul IAB node, including a mobile terminal MT and a distributed unit DU, and the corresponding resource configuration Including resource configuration corresponding to the MT and resource configuration corresponding to the DU.

Combined with the first aspect and the above implementation manner, in some implementation manners of the first aspect, the first resource configuration information is carried in a radio resource control RRC message sent to the MT, or the first resource configuration information The information is carried in messages sent to the DU over the F1 interface.

Combining the first aspect and the above implementation manner, in some implementation manners of the first aspect, the first node is an integrated access backhaul IAB node, and the method further includes: the first network device receives an IAB node from another network device. Second resource configuration information. The second resource configuration information indicates the corresponding resource configuration after any IAB node accesses the cell corresponding to the other network device. The cell corresponding to the other network device is different from the first network device. Corresponding cells are neighboring cells to each other.

Combined with the first aspect and the above implementation manner, in some implementation manners of the first aspect, the method further includes: the first network device sends third resource configuration information to other network devices, and the third resource configuration information indicates that the node The corresponding resource configuration after accessing the cell corresponding to the first network device, and the cells corresponding to the other network devices and the cell corresponding to the first network device are neighboring cells to each other.

In a second aspect, a communication method is provided, including: after the first node accesses the first cell, the first node (which may also be a module in the first node, such as a chip) receives a third signal from the first network device. A resource configuration information, the first resource configuration information indicates the resource configuration corresponding to the first node after switching to a neighboring cell of the first cell, and the first cell is the corresponding resource configuration of the first network device. Any one of the cells, then, if the first node accesses the target cell, and the target cell is one of the neighboring cells of the first cell, the first node takes effect and the first resource configuration The information indicates the resource configuration corresponding to the first node after accessing the target cell.

Based on the above technical solution, after the migration node initially accesses or switches to a certain cell, the network equipment corresponding to the cell sends the migration node the following information. After the migration node switches to one or more potential neighboring cells of the cell in the future, the The resource configuration corresponding to the migration node. Later, if the migration node switches to one of the above potential neighbor cells in the future, Then the migration node can directly take effect the corresponding resource configuration. Compared with determining the target cell and then delivering the resource configuration information, this method can improve the rapid mobility of the migration node and the time required for the delivery of resource configuration information. This method can improve the problem of data transmission interruption compared to issuing resource configuration information after the migration node migrates to the target cell.

With reference to the second aspect, in some implementations of the second aspect, the first resource configuration information also indicates the resource configuration corresponding to the first node after accessing the first cell, and the method further includes : After the first node accesses the first cell, the first node validates the resources corresponding to the first node after accessing the first cell indicated by the first resource configuration information. configuration.

Combined with the second aspect and the above implementation manner, in some implementation manners of the second aspect, the method further includes: the first node caches the first resource configuration information.

Combining the second aspect and the above implementation manner, in some implementation manners of the second aspect, the first node is an integrated access backhaul IAB node, including a mobile terminal MT and a distributed unit DU, and the corresponding resource configuration Including resource configuration corresponding to the MT and resource configuration corresponding to the DU.

Combined with the second aspect and the above implementation manner, in some implementation manners of the second aspect, the first resource configuration information is carried in the RRC message received by the MT, or the first resource configuration information is carried in the The DU receives messages through the F1 interface.

In a third aspect, a communication method is provided, including: when the first network device (can also be a module in the first network device, such as a chip) determines that the first node is going to access the target cell, determine that the first node is about to access the target cell. The target resource configuration corresponding to the node after accessing the target cell. The target cell is the cell corresponding to the first network device. Then, the first network device determines the target resource configuration based on the first information and the target resource configuration. The identifier of the target resource configuration, the first information indicates the association between multiple resource configurations and multiple identifiers, the multiple resource configurations include the target resource configuration, and then, the first node accesses After selecting the target cell, the first network device sends the identification of the target resource configuration to the first node.

Based on the above technical solution, by pre-configuring the association between multiple resource configurations and multiple identifiers to each network device and each node, when a cell switch occurs, the network device corresponding to the target cell only sends the node after the cell switch to the node. The identification of the corresponding resource configuration, thereby avoiding the need to deliver complete resource configuration information to the node and reducing the amount of data that needs to be sent during cell switching. Compared with delivering complete resource configuration information when cell switching occurs, this method can reduce the number of resource configurations delivered. Therefore, this method can improve the contradiction between the rapid mobility of the migrating node and the time required for the distribution of resource configuration information, and can also improve the problem of data transmission interruption.

With reference to the third aspect, in some implementations of the third aspect, the identification of the target resource configuration includes an index number corresponding to the target resource configuration.

Combined with the third aspect and the above implementation manner, in some implementation manners of the third aspect, the method further includes: the first network device receiving from the second network device that the cell currently accessed by the first node is the second The cell is an identifier of the resource configuration corresponding to the first node, and the second cell is the cell corresponding to the second network device; the determination of the target resource corresponding to the first node after accessing the target cell Configuration includes: the first network device determines the target resource configuration based on the identifier of the resource configuration corresponding to the first node and the first information when the cell currently accessed by the first node is the second cell, wherein, The plurality of identifiers include identifiers of resource configurations corresponding to the first node when the cell currently accessed by the first node is the second cell.

With reference to the third aspect and the above implementation manner, in some implementation manners of the third aspect, the method further includes: the first network device sending the identification of the target resource configuration to the second network device.

Combining the third aspect and the above implementation manner, in some implementation manners of the third aspect, the first section is an integrated access backhaul IAB node, including a mobile terminal MT and a distributed unit DU, and the target resource configuration includes After the MT is handed over to the target cell, the resource configuration corresponding to the MT is the same as the resource configuration corresponding to the DU.

Combined with the third aspect and the above implementation manner, in some implementation manners of the third aspect, the identity of the target resource configuration is carried in the RRC message sent to the MT, or the identity of the target resource configuration is carried in the in messages sent to the DU via the F1 interface.

In a fourth aspect, a communication method is provided, including: after the first node accesses the target cell, the first node (which may also be a module in the first node, such as a chip) receives a signal from the first network device. An identifier of the target resource configuration. The target resource configuration is the resource configuration corresponding to the first node after accessing the target cell. The target cell is the cell corresponding to the first network device. Then, the first node The target resource configuration is determined and validated according to the identifier of the target resource configuration and first information, the first information indicates the association between multiple resource configurations and multiple identifiers, the multiple resource configurations include the Describe the target resource configuration.

With reference to the fourth aspect, in some implementations of the fourth aspect, the identification of the target resource configuration includes an index number corresponding to the target resource configuration.

Combining the fourth aspect and the above implementation manner, in some implementation manners of the fourth aspect, the first node is an integrated access backhaul IAB node, including a mobile terminal MT and a distributed unit DU, and the target resource configuration includes After the MT is handed over to the target cell, the resource configuration corresponding to the MT is the same as the resource configuration corresponding to the DU.

Combined with the fourth aspect and the above implementation manner, in some implementation manners of the fourth aspect, the identity of the target resource configuration is carried in the RRC message sent to the MT, or the identity of the target resource configuration is carried in the in messages sent to the DU via the F1 interface.

In a fifth aspect, a communication method is provided, including: a second network device (which may also be a module in the second network device, such as a chip) receiving an identification of a target resource configuration from the first network device, and the target resource The configuration is the resource configuration corresponding to the first node after accessing the target cell. The target cell is the cell corresponding to the first network device, wherein the cell currently accessed by the first node is the second cell, and the The second cell is a cell corresponding to the second network device. Then, the second network device sends the identification of the target resource configuration to the first node.

Based on the above technical solution, by pre-configuring the association between multiple resource configurations and multiple identifiers to each network device and each node, when a cell switch occurs, the corresponding network device of the source cell only sends the cell switch to the node. The identifier of the resource configuration corresponding to the node, thereby avoiding the need to deliver complete resource configuration information to the node and reducing the amount of data that needs to be sent during cell switching. Compared with delivering complete resource configuration information when cell switching occurs, this method can reduce the number of resources delivered. Therefore, this method can improve the conflict between the rapid mobility of the migrating node and the time required for the distribution of resource configuration information, and can also improve the problem of data transmission interruption.

With reference to the fifth aspect, in some implementations of the fifth aspect, the identification of the target resource configuration includes an index number corresponding to the target resource configuration.

Combined with the fifth aspect and the above implementation manner, in some implementation manners of the fifth aspect, the method further includes: after determining that the first node is going to access the target cell, the second network device determines that the first node is going to access the target cell. The resource configuration and first information corresponding to the first node when the cell currently accessed by a node is the second cell. It is determined that the resource configuration corresponding to the first node when the cell currently accessed by the first node is the second cell. Identity, the first information indicates the association between multiple resource configurations and multiple identifiers, the multiple resource configurations include the first node corresponding to the cell when the cell currently accessed by the first node is the second cell. Resource configuration, then, the second network device sends to the first network device an identifier of the resource configuration corresponding to the first node when the cell currently accessed by the first node is the second cell.

Combining the fifth aspect and the above implementation manner, in some implementation manners of the fifth aspect, the first node is an integrated access backhaul IAB node, including a mobile terminal MT and a distributed unit DU, and the target resource configuration includes After the MT is handed over to the target cell, the resource configuration corresponding to the MT is the same as the resource configuration corresponding to the DU.

Combined with the fifth aspect and the above implementation manner, in some implementation manners of the fifth aspect, the identity of the target resource configuration is carried in the RRC message sent to the MT, or the identity of the target resource configuration is carried in the in messages sent to the DU via the F1 interface.

In a sixth aspect, a communication method is provided, including: during the process of accessing the target cell, the first node (which can also be a module in the first node, such as a chip) receives the target resource configuration from the second network device. The target resource configuration is the resource configuration corresponding to the first node after accessing the target cell. The target cell is the cell corresponding to the first network device. Then, the first node configures the target resource according to the target resource. The configured identifier and first information determine and validate the target resource configuration. The first information indicates the association between multiple resource configurations and multiple identifiers, and the multiple resource configurations include the target resource configuration.

With reference to the sixth aspect, in some implementations of the sixth aspect, the identification of the target resource configuration includes an index number corresponding to the target resource configuration.

Combining the sixth aspect and the above implementation manner, in some implementation manners of the sixth aspect, the first node is an integrated access backhaul IAB node, including a mobile terminal MT and a distributed unit DU, and the target resource configuration includes After the MT is handed over to the target cell, the resource configuration corresponding to the MT is the same as the resource configuration corresponding to the DU.

Combined with the sixth aspect and the above implementation manner, in some implementation manners of the sixth aspect, the identity of the target resource configuration is carried in the RRC message sent to the MT, or the identity of the target resource configuration is carried in the in messages sent to the DU via the F1 interface.

A seventh aspect provides a communication device, which may be a network device in the above method, or a chip applied in a network device. The communication device includes: a processor, coupled to a memory, capable of executing instructions in the memory to implement the method executed by the first network device in the above first aspect and any of its possible implementations, or to implement the above The method executed by the first network device in the third aspect and any possible implementation manner thereof method, or to implement the method executed by the second network device in the above fifth aspect and any possible implementation manner thereof. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled to the communication interface.

When the communication device is a network device, the communication interface may be a transceiver, or an input/output interface.

When the communication device is a chip used in network equipment, the communication interface may be an input/output interface.

Optionally, the transceiver may be a transceiver circuit. Optionally, the input/output interface may be an input/output circuit.

An eighth aspect provides a communication device. The communication device may be the first node in the above method, or may be a chip applied in the first node. The communication device includes: a processor, coupled to a memory, and capable of executing instructions in the memory to implement the method executed by the first node in the above second aspect and any of its possible implementations, or to implement the above third aspect. The method executed by the first node in the fourth aspect and any possible implementation thereof, or to implement the method executed by the first node in the above sixth aspect and any possible implementation thereof. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled to the communication interface.

When the communication device is the first node, the communication interface may be a transceiver, or an input/output interface.

When the communication device is a chip applied in the first node, the communication interface may be an input/output interface.

A ninth aspect provides a program, which, when executed by a communication device, is used to perform any method in the first aspect and its possible implementations, or to perform the second aspect and its possible implementations. Any method in, or used to perform any method in the third aspect and its possible implementations, or used to perform any method in the fourth aspect and its possible implementations, or used to perform the fifth any method in the sixth aspect and its possible implementations, or for performing any method in the sixth aspect and its possible implementations.

In a tenth aspect, a program product is provided. The program product includes: program code. When the program code is run by a communication device, the communication device causes the communication device to perform any method in the above-mentioned first aspect and its possible implementations. , or causing the communication device to perform any method in the above-mentioned second aspect and its possible implementations, or causing the communication device to perform any method in the above-mentioned third aspect and its possible implementations, or causing the communication device to perform the above-mentioned third aspect. Any method in the four aspects and its possible implementations, or causing the communication device to perform any method in the above-mentioned fifth aspect and its possible implementations, or causing the communication device to perform the above-mentioned sixth aspect and its possible implementations any of the methods.

In an eleventh aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores a program. When the program is executed, the communication device causes the communication device to perform any of the above-mentioned first aspect and its possible implementations. A method that either causes the communication device to perform any method in the above-mentioned second aspect and its possible implementations, or causes the communication device to perform any method in the above-mentioned third aspect and its possible implementations, or causes the communication device to perform Any method in the above fourth aspect and its possible implementations, or causing the communication device to perform any method in the above fifth aspect and its possible implementations, or causing the communication device to perform the above sixth aspect and its possible implementations Any method in the embodiment.

Description of the drawings

Figure 1 is a schematic architectural diagram of an IAB network provided by this application;

Figure 2 is a schematic diagram of an example of the communication principle of the IAB network provided by this application;

Figure 3 is a schematic diagram of the scene when the IAB-node provided by this application moves;

Figure 4 is a schematic diagram of an example of a communication method provided by this application;

Figure 5 is a schematic diagram of another communication method provided by this application;

Figure 6 is a schematic diagram of another communication method provided by this application;

Figure 7 is a schematic block diagram of a communication device provided by this application;

Figure 8 is a schematic block diagram of another communication device provided by this application.

Detailed ways

The technical solution in this application will be described below in conjunction with the drawings in this application. Among them, in the description of this application, unless otherwise stated, "/" means that the related objects are an "or" relationship. For example, A/B can mean A or B; "and/or" in this application "It is just an association relationship that describes related objects. It means that there can be three relationships. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. Among them, A ,B can be singular or plural. Furthermore, in the description of this application, unless otherwise specified, "plurality" means two or more than two. "At least one of the following" or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items). For example, at least one of a, b, or c can mean: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple . In addition, in order to facilitate a clear description of the technical solution of the present application, in the embodiments of the present application, words such as “first” and “second” are used to distinguish the same or similar items with basically the same functions and effects. Those skilled in the art can understand that words such as "first" and "second" do not limit the number and execution order, and words such as "first" and "second" do not limit the number and execution order.

Compared with the fourth generation mobile communication (4G) system, the fifth generation mobile communication (5G) system puts forward more stringent requirements for various network performance indicators. For example, the 5G system proposes a 1,000-fold increase in network capacity and a wider network. network coverage, as well as ultra-high reliability and ultra-low latency requirements.

On the one hand, considering that high-frequency carrier frequency resources are abundant, in hotspot areas, in order to meet the ultra-high network capacity requirements of 5G systems, it has become increasingly popular to use high-frequency small station networking. However, high-frequency carrier propagation characteristics are poor. Due to severe obstruction and attenuation, the coverage area is not wide, so a large number of small stations need to be deployed densely. Correspondingly, it is very expensive to provide fiber backhaul for these densely deployed small stations, and the construction is difficult, so economical and convenient backhaul is needed. On the other hand, from the perspective of broader network coverage requirements, when providing network coverage to some remote areas, due to the difficulty and high cost of fiber optic deployment, flexible and convenient access and backhaul also need to be designed. plan.

Integrated access and backhaul (IAB) technology provides ideas for improving the above two problems. Both its access link (Access Link) and backhaul link (Backhaul Link) adopt wireless transmission solutions, reducing fiber optic deployment.

Figure 1 shows an example architecture diagram of an IAB network. In the IAB network, the IAB node (IAB-node) can provide wireless access services for terminal equipment. The business data of the terminal equipment is transmitted from the IAB-node to the IAB host (IAB- donor).

IAB-node is composed of mobile terminal (MT) part and distributed unit (DU) part. When IAB-node faces its parent node, it can act as a terminal device, that is, the role of MT; when IAB When -node faces its child node, the child node may be another IAB-node, or the child node may be a terminal device, which is regarded as a network device, that is, it plays the role of DU.

IAB-donor is an access network element with complete base station (gNB) function, including centralized unit (CU) and distributed unit (DU). IAB-donor is connected to the network that serves terminal equipment. nuclear core network (e.g., connected to the 5G core network).

The terminal device 111 may also be called user equipment (UE). The terminal device 111 in this application is a device with wireless transceiver function, which can communicate with one or more access network devices (also called access devices) in the wireless access network (radio access network, RAN). Core network (CN) equipment (also called core equipment) communicates. Terminal equipment 111 may also be referred to as an access terminal, terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, user agent or user device, etc. The terminal device 111 can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons, satellites, etc.).

The terminal device 111 may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a smart phone, a mobile phone, a wireless local loop (WLL) ) website, personal digital assistant (PDA), etc. In addition, the terminal device 111 may also be a handheld device with wireless communication function, a computing device or other device connected to a wireless modem, a vehicle-mounted device, a wearable device, a drone device or a terminal in the Internet of Things, the Internet of Vehicles, or a 5G network As well as any form of terminals in the future network, relay user equipment or terminals in the future evolved 6G network, etc. The relay user equipment may be, for example, a 5G residential gateway (RG).

The terminal device 111 may also be a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control (industrial control), a wireless terminal in self-driving (self-driving), or a remote terminal. Wireless terminals in remote medical, wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, and smart home wireless terminals, etc. The embodiments of the present application do not limit the type or type of terminal equipment.

In the IAB network, a transmission path between the terminal device and the IAB-donor can contain one or more IAB-nodes. Each IAB-node needs to maintain a wireless backhaul link to the parent node, and also needs to maintain a wireless link with its child nodes. If the child node of the IAB-node is a terminal device, the wireless link between the IAB-node and the child node (i.e., terminal device) is a wireless access link; if the child node of the IAB-node is another IAB-node, The wireless link between this IAB-node and child nodes (ie, other IAB-nodes) is the wireless backhaul link.

For example, take the path "Terminal device 1→IAB-node4→IAB-node3→IAB-node1→IAB-donor" in Figure 1 as an example. In this path, terminal device 1 accesses the IAB through a wireless access link. -node4, IAB-node4 is connected to IAB-node3 through a wireless backhaul link, IAB-node3 is connected to IAB-node1 through a wireless backhaul link, and IAB-node1 is connected to IAB-donor through a wireless backhaul link.

It is worth mentioning that this application does not limit the number of hops between IAB-node and IAB-donor and between the terminal device in each path. For example, the MT of IAB-node3 can also directly connect to the DU of IAB-donor. Alternatively, the DU of IAB-node3 can also be directly connected to terminal device 1.

Figure 2 shows an example of the communication principle diagram of the IAB network. In the IAB network, it can be logically considered that the IAB-node DU (hereinafter referred to as "IAB-DU") is connected to the IAB-donor-CU through the F1 interface. In fact, the connection between IAB-DU and IAB-donor CU is realized through the NR Uu interface between the IAB-node MT of each hop (hereinafter referred to as "IAB-MT") and the IAB-DU of the parent node. , but since IAB-DU can finally communicate with IAB-donor CU, it can be considered that there is an F1 interface logically, and the two can communicate through the F1 interface. IAB-donor CU can communicate with IAB-donor CU or ordinary base stations. Communicates via the Xn interface and connects to the 5G core network.

In the IAB network, the IAB-node can move. Figure 3 shows a schematic diagram of the scenario when the IAB-node moves. For example, IAB-node3 is deployed on a vehicle to provide network access services for terminal devices in or near the vehicle, and can move with the vehicle. IAB-node3 is currently connected to IAB-DU1 controlled by IAB-donor CU1 cell, but as IAB-node3 moves away from IAB-DU1, the signal quality of the cell under IAB-DU1 will become worse for IAB-MT3. In this case, IAB-donor CU1 can decide Switch the cell that IAB-MT3 is currently connected to. For example, IAB-donor CU1 decides to switch the cell that IAB-MT3 is currently connected to from the cell under IAB-DU1 controlled by IAB-donor CU1 to be controlled by IAB-donor CU2. After that, IAB-donor CU1 sends a handover command to IAB-MT3. The handover command instructs IAB-MT3 to switch the currently accessed cell to the cell under IAB-DU1 controlled by IAB-donor CU1. The cell under IAB-DU2 controlled by IAB-donor CU2. In addition, IAB-donor CU1 can also inform IAB-donor CU2: IAB-MT3 will access the cell under IAB-DU2 controlled by IAB-donor CU2. It is worth mentioning that in this application, the node that moves can be called a "migration node".

After IAB-donor CU2 determines that IAB-MT3 will access the cell under IAB-DU2 controlled by IAB-donor CU2, it can confirm that IAB-MT3 switches to the cell under IAB-DU2 controlled by IAB-donor CU2. IAB-DU3 And the resource configuration corresponding to IAB-MT3.

After it is determined that IAB-MT3 switches to the cell under IAB-DU2 controlled by IAB-donor CU2, and the corresponding resources of IAB-DU3 and IAB-MT3 are configured, in one implementation, IAB-donor CU2 can pass the Xn interface Send a message carrying resource configuration information to IAB-donor CU1. The resource configuration information instructs IAB-MT3 to switch to the cell under IAB-DU2 controlled by IAB-donor CU2. The corresponding resource configurations of IAB-DU3 and IAB-MT3 are In this case, IAB-donor CU1 can send a message carrying resource configuration information to IAB-DU3 through the F1 interface.

It is worth mentioning that in this application, after IAB-MT3 switches to the cell under IAB-DU2 controlled by IAB-donor CU2, the corresponding resource configurations of IAB-DU3 and IAB-MT3 can be understood as: IAB-MT3 connects After entering the cell under IAB-DU2 controlled by IAB-donor CU2, IAB-DU3 can adopt the resource configuration in the cell generated by itself, and IAB-MT3 can adopt the resource configuration in the cell generated by the DU of the parent node.

In another implementation, IAB-donor CU2 can wait for the establishment of a connection based on the F1 interface between IAB-DU3 and IAB-donor CU2. In other words, IAB-donor CU2 can wait for IAB-MT3 to migrate to IAB-donor. After the cell under IAB-DU2 is controlled by CU2, IAB-donor CU2 sends a message carrying resource configuration information to IAB-DU3 through the F1 interface.

However, the message carrying resource configuration information sent through the F1 interface, for example, the GNB-DU RESOURCE CONFIGURATION message, contains the resource configuration information of all cells associated with the migration node, and the amount of data is relatively large. For example, the above resource configuration After the message instructs IAB-MT3 to switch to the cell under IAB-DU2 controlled by IAB-donor CU2, when configuring the resources corresponding to IAB-DU3, the message contains the corresponding cells (cells) in the effective cell list of IAB-DU3. The maximum number of resource configuration information can be 512), in which the resource configuration information corresponding to each cell indicates that after IAB-MT3 accesses the cell under IAB-DU2 controlled by IAB-donor CU2, IAB-DU3 will take effect on its own The corresponding resource configuration in the cell, that is, the resource configuration that IAB-DU3 can adopt in the cell where it is effective. The above resource configuration information is after instructing IAB-MT3 to switch to the cell under IAB-DU2 controlled by IAB-donor CU2. , when configuring resources corresponding to IAB-MT3, this message contains the resource configuration information corresponding to all cells (the maximum number of cells can be 512) in the cell list generated by IAB-DU2, where each cell The resource configuration information corresponding to the area indicates that after IAB-MT3 accesses the cell under IAB-DU2 controlled by IAB-donor CU2, the corresponding resource configuration of IAB-MT3 in the cell where IAB-DU2 takes effect, that is, IAB-MT3 The resource configuration that can be adopted in the cell with IAB-DU2 taking effect.

Since the data volume of messages carrying resource configuration information sent through the F1 interface is relatively large, the delivery of resource configuration information often takes a certain amount of time. In this case, if the resource configuration information is sent after the target cell is determined, issued. Since the migration node (for example, IAB-node3) is mobile, the following problems may exist at this time: the resource configuration information has not yet been transmitted, and the MT of the migration node (for example, IAB-MT3) corresponds to the source cell. The IAB-DU (for example, IAB-DU2) is disconnected, causing the resource configuration information to fail to be delivered.

Since only when the migration node successfully receives the resource configuration information, the DU of the migration node (for example, IAB-DU3) can provide data services for its own child nodes and terminal devices. In this case, if the migration node migrates to the target If the resource configuration information is issued after the cell is completed, data transmission will be interrupted for a long time.

In view of this, this application provides a communication method. After the migration node initially accesses or switches to a certain cell, the IAB-donor CU corresponding to the cell sends to the migration node the information that the migration node will switch to the cell in the future. After multiple potential neighbor cells, the resource configuration corresponding to the migration node is configured. After that, if the migration node switches to one of the above multiple potential neighbor cells in the future, the migration node can directly take effect with the corresponding resources. Configuration, compared to issuing resource configuration information after determining the target cell, this method can improve the contradiction between the rapid mobility of the migrating node and the time required for the issuing of resource configuration information; This method can improve the problem of data transmission interruption by migrating to the target cell and then delivering the resource configuration information.

The technical solution of this application can be applied to various communication systems, such as: New Radio (NR) in the fifth generation (5th Generation, 5G) mobile communication system and future mobile communication systems.

The communication methods provided by this application are introduced in detail below. First, an example communication method provided by this application is introduced. Figure 4 shows an exemplary flow chart of the method. The method at least includes the following steps.

Step 402: After the first node accesses the first cell, send first resource configuration information to the first node. The first resource configuration information indicates the corresponding resource configuration of the first node after switching to a neighboring cell of the first cell. The first cell is any one of the cells corresponding to the first network device. Correspondingly, the first node receives the first resource configuration information from the first network device.

Exemplarily, after the first node initially accesses or switches from a certain cell to the first cell, the first network device determines the neighboring cells of the first cell, and determines if the first node subsequently switches to the neighboring cells of the first cell. , the resource configuration corresponding to the first node, and then the first network device can send the resource configuration corresponding to the first node after accessing the neighboring cell of the first cell to the first node through the first resource configuration information. It is worth mentioning that the cell corresponding to the first network device can be understood as: a cell controlled by the first network device.

Optionally, as an implementation manner, the first node may be an IAB node, which includes an MT and a DU. In this case, the first resource configuration information may indicate that the MT of the first node switches to the neighbor of the first cell. After the zone, the resource configuration corresponding to the MT of the first node is the same as the resource configuration corresponding to the DU of the first node.

When the first node includes an MT and a DU, the resource configuration corresponding to the first node in this application can be understood as: after the MT of the first node switches to a neighboring cell of the first cell, the MT of the first node The resource configuration that can be adopted in the cell generated by the parent node of the first node and the resource configuration that the DU of the first node can adopt in the cell generated by itself.

It is worth mentioning that in this application, the MT of the first node can be in the cell generated by the parent node of the first node. The resource configuration adopted is the same as the resource configuration that the DU of the parent node of the first node can adopt in the same cell where it is generated.

Optionally, as an implementation manner, when sending the first resource configuration information to the first node, the first network device may carry the first resource configuration information in a radio resource control RRC message sent to the MT, or may The first resource configuration information is carried in a message sent to the DU through the F1 interface.

Optionally, as an implementation manner, the first resource configuration information may also indicate that after the MT of the first node switches to a neighboring cell of the first cell, the DU of the child node of the first node can be used in the cell generated by itself. resource allocation.

The method for the first network device to determine the neighboring cells of the first cell is introduced below.

Optionally, as an implementation manner, the first node is deployed on the vehicle. In this case, the first network device can configure the first node according to the vehicle after initial access or handover from a certain cell to the first cell. The driving trajectory determines the neighboring cells of the first cell.

For example, the first network device may determine one or more neighboring cells that the vehicle may reach based on the driving trajectory of the vehicle, and then determine one or more neighboring cells that the vehicle may reach as neighboring cells of the first cell.

Optionally, as an implementation manner, the first network device may determine all neighboring cells of the first cell as neighbors of the first cell after the first node initially accesses or switches from a certain cell to the first cell. district.

The following describes a method for the first network device to determine the corresponding resource configuration after the first node accesses or switches to a neighboring cell of the first cell.

Optionally, as an implementation manner, the first network device can determine in advance the resource configuration that can be adopted if a certain node accesses the neighboring cells of each cell controlled by the first network device. After determining the neighboring cells of the first cell, Finally, the resource configuration that a certain node can adopt after accessing the adjacent cells of the first cell can be determined from the predetermined resource configurations that can be adopted by a certain node after accessing the adjacent cells of each cell controlled by the first network device.

The following is an introduction to a resource configuration method that the first network device can adopt after acquiring a node to access neighboring cells of each cell controlled by the first network device.

Optionally, as an implementation method, the first network device can interact with other network devices about resource configurations that a node can adopt after accessing its respective cells. It is worth mentioning that the resource configurations controlled by other network devices The cell and the cell controlled by the first network device are adjacent cells to each other.

In this case, before step 402, the method may also include step 401: exchanging resource configurations that can be adopted by a certain node after switching to its respective cells between the first network device and other network devices.

Optionally, as an implementation manner, step 401 can be implemented as follows: the first network device receives second resource configuration information from other network devices, and the second resource configuration information instructs any node (for example, IAB node) to access The resource configuration that can be adopted after the cells corresponding to other network devices. Correspondingly, the first network device can also send third resource configuration information to other network devices. The third resource configuration information indicates that the node accesses the cell controlled by the first network device. Possible resource configurations.

For example, other network devices can send the resource configuration that can be adopted by the node after accessing the cell it controls through the second resource configuration information to the network device corresponding to the neighboring cell of each cell it controls. Since the cell controlled by the first network device is different from the cell controlled by the first network device, Cells controlled by other network devices are neighboring cells to each other. Therefore, the first network device can receive the second resource configuration information from other network devices, and then can obtain the neighbor cells of the cell controlled by the node accessing the first network device. The resource configuration that can be adopted later.

It is worth mentioning that other network devices can be among the network devices corresponding to the neighboring cells of each cell that they control. When establishing a connection between nodes, for example, when establishing a connection through the , other network devices can also send the changed resources to the network devices corresponding to neighboring cells of each cell they control through the second resource configuration information after the resource configuration that can be adopted by the node after accessing the cell it controls changes.

Correspondingly, the first network device can also send the resource configuration that can be adopted by the node after accessing the cell it controls through the third resource configuration information to the network device corresponding to the neighboring cell of each cell it controls. Since other network devices control The cell and the cell controlled by the first network device are neighboring cells to each other. Therefore, other network devices can receive the third resource configuration information from the first network device, and then can obtain the node access to the cell controlled by other network devices. The resource configuration that can be adopted after neighboring cells.

It is worth mentioning that when the first network device can establish a connection between the network devices corresponding to the neighboring cells of each cell it controls, the resource configuration that can be adopted after connecting the node to the cell it controls is through the third resource configuration The information is sent to the network equipment corresponding to the neighboring cells of each cell it controls. In addition, the first network equipment can also change the resource configuration that can be used by the node after accessing the cell it controls, and pass the changed resources through the third party. The resource configuration information is sent to the network equipment corresponding to the neighboring cells of each cell controlled by itself.

It should be understood that there is no sequence between other network devices sending the second resource configuration information and the first network device sending the third resource configuration information. In other words, both can send their respective resource configuration information at the same time, or one can send the third resource configuration information at the same time. One sends its own resource configuration information before or after, and this application does not limit this.

Step 403: If the first node accesses the target cell, and the target cell is one of the neighboring cells of the first cell, the first node takes effect and the first node corresponding to the first resource configuration information after accessing the target cell takes effect. resource allocation.

For example, after the first node accesses the first cell, it is assumed that the first node itself moves. Due to the movement of the first node, the first network device decides to switch the cell that the first node currently accesses from the first cell. to the target cell, and then the first network device sends a handover command to the first node, where the handover command instructs the first node to switch the currently accessed cell from the first cell to the target cell.

After receiving the handover command from the first network device, the first node can initiate random access to the network device corresponding to the target cell. If the first node's random access in the target cell is successful, it means that the first node has successfully accessed In this case, the first node can validate the resource configuration corresponding to the first node after accessing the target cell indicated by the first resource configuration information.

Optionally, as an implementation manner, after receiving the first resource configuration information, the first node may cache the resources indicated by the first resource configuration information, so that after the first node subsequently switches to the first cell, The resource configuration that can be adopted after switching to the first cell can be taken into effect in a timely manner based on the cached first resource configuration information.

Optionally, as an implementation manner, the first resource configuration information also indicates the resource configuration corresponding to the first node after accessing the first cell.

For example, if the first node initially accesses the first cell, the first node may not know the resource configuration that it can adopt after accessing the first cell. To avoid this situation, the first node may use the first resource configuration information. Indicate to the first node the resource configuration that the first node can adopt after accessing the first cell, so that if the first node is not clear about the resource configuration that it can adopt after accessing the first cell, it can use the first node to configure the resource configuration that the first node can adopt after accessing the first cell. The resource configuration information takes effect and is the resource configuration that can be adopted after accessing the first cell.

In addition, the first resource configuration information indicates the corresponding resource configuration of the first node after accessing the first cell, and also The following problems can be improved: assuming that the first node switches from the previous cell to the first cell, if the first node moves too fast when moving from the previous cell to the first cell, it is possible that the first node has not yet After successfully receiving the resource configuration that can be adopted after switching to the neighboring cell of the previous cell, the first node moves out of the previous cell. In this case, after the first node switches to the first cell, it cannot determine whether it has access to the third cell. The resource configuration that can be adopted after a cell is established.

Optionally, as an implementation manner, the first node may be an IAB node, which includes an MT and a DU. In this case, the first resource configuration information may indicate that after the MT of the first node switches to the first cell, The resource configuration corresponding to the MT of the first node and the resource configuration corresponding to the DU of the first node.

Optionally, as an implementation manner, the resource configuration that the node in this application can adopt may include resource configuration of transmission resources, resource configuration of random access channel resources, and resource configuration of resources used to carry system information blocks. At least one, wherein, for transmission resources, the resource configuration information can be specifically used to configure parameters such as frequency, bandwidth, and time slots of the transmission resources.

Based on the above method, after the migration node initially accesses or switches to a certain cell, the network equipment corresponding to the cell sends to the migration node the migration node after the migration node switches to one or more potential neighboring cells of the cell in the future. The resource configuration corresponding to the node. Later, if the migration node switches to one of the above potential neighbor cells in the future, the migration node can directly take effect the corresponding resource configuration. Compared with determining the target cell and then By distributing resource configuration information, this method can improve the conflict between the rapid mobility of the migrating node and the time required for the distribution of resource configuration information; compared with the problem of transmitting resource configuration information after the migrating node has migrated to the target cell, This method can improve the problem of data transmission interruption.

In addition, this application also provides another communication method, by pre-configuring the association between multiple resource configurations and multiple identifiers to each network device and each node, so that when a cell handover occurs, the source cell The corresponding network device or the network device corresponding to the target cell only sends to the node the identification of the resource configuration corresponding to the node after cell switching, thereby avoiding the need to deliver complete resource configuration information to the node and reducing the amount of data that needs to be sent during cell switching. Compared with Complete resource configuration information is delivered when a cell handover occurs. This method can reduce the time required to deliver resource configuration. Therefore, this method can improve the fast mobility of the migrating node and the time required to deliver resource configuration information. Conflict problems and can improve the problem of data transmission interruption.

An example communication method among the above-mentioned another communication method provided by this application is introduced below. Figure 5 shows an exemplary flow chart of the method, which at least includes the following steps.

Step 503: When the first network device determines that the first node is going to access the target cell, the first network device determines the target resource configuration corresponding to the first node after accessing the target cell. The target cell is the cell corresponding to the first network device. .

For example, after the first node accesses a certain cell, for example, the second cell, it is assumed that the first node itself moves, and the movement of the first node triggers the network equipment corresponding to the second cell, for example, the second network The device decides to switch the cell currently accessed by the first node from the second cell to the target cell. After that, the second network device sends a handover command to the first node, and the handover command instructs the first node to switch the cell currently accessed by the first node. The cell is switched to the target cell. In addition, the second network device can also inform the first network device corresponding to the target cell: the first node will access the target cell.

When the first network device determines that the first node is going to access the target cell, it may determine that the first node is going to access the target cell. The target resource configuration corresponding to the zone.

Optionally, the first network device may determine the target resource configuration in the following manner:

Way 1

The first network device may determine the target resource configuration that the first node can adopt after accessing the target cell based on the resource configuration currently adopted by the parent node of the first node after the first node accesses the target cell.

Way 2

When the second network device decides to switch the cell currently accessed by the first node from the first cell to the target cell, the second network device may send to the first network device the information corresponding to the first node when the cell currently accessed by the first node is the second cell. The identifier of the resource configuration. After receiving the identifier of the resource configuration of the first node from the second network device when the cell currently accessed by the first node is the second cell, the first network device can configure the identifier of the resource configuration according to the current status of the first node. The identifier and the first information of the resource configuration corresponding to the first node when the accessed cell is the second cell determine the resource configuration that the first node can adopt when the cell currently accessed by the first node is the second cell, and then determine the resource configuration that the first node can adopt according to the second cell. The resource configuration that the first node can adopt when the cell currently accessed by a node is the second cell determines the target resource configuration, where the first information indicates the association between multiple resource configurations and multiple identifiers, and the multiple identifiers include An identifier of the resource configuration corresponding to the first node when the cell currently accessed by the first node is the second cell.

For example, the second network device may determine the identifier of the resource configuration corresponding to the first node when the cell currently accessed by the first node is the second cell based on the association between the multiple resource configurations and the multiple identifiers, and provide the identifier to the first node. A network device sends an identifier of the resource configuration corresponding to the first node when the cell currently accessed by the first node is the second cell.

The first network device determines, based on the first information and the identifier of the resource configuration corresponding to the first node when the cell currently accessed by the first node is the second cell, that the cell currently accessed by the first node is the second cell. After configuring the resources that can be used by a node, the resource configuration that can be used by the first node when the cell currently accessed by the first node is the second cell can be adjusted, and the adjusted resource configuration can be used as the target resource configuration to transmit resources. For example, the first network device may adjust some of the time slots in some resources from time slots used for uplink transmission to time slots used for downlink transmission.

Based on mode 2, the method may further include step 501 and step 502 before step 503.

Step 501: After determining that the first node is going to access the target cell, the second network device determines the first node based on the resource configuration and first information corresponding to the first node when the cell currently accessed by the first node is the second cell. When the currently accessed cell is the second cell, the identifier of the resource configuration corresponding to the first node. The first information indicates the association between multiple resource configurations and multiple identifiers. The multiple resource configurations include the first node currently accessed. The resource configuration corresponding to the first node when the cell is the second cell, the second cell is the cell that the first node accesses before accessing the target cell, and the target cell is the cell corresponding to the first network device.

For example, when the second network device decides to switch the cell currently accessed by the first node from the first cell to the target cell, the second network device may use the first information preconfigured by the OAM and the cell currently accessed by the first node as the second cell. The resource configuration that the first node can adopt when the cell is the cell, and the identification of the resource configuration that the first node can adopt when it is determined that the cell currently accessed by the first node is the second cell. After that, the second network device performs step 502: the second network device Send to the first network device an identifier of the resource configuration corresponding to the first node when the cell currently accessed by the first node is the second cell. Correspondingly, the first network device receives from the second network device an identifier of the resource configuration corresponding to the first node when the cell currently accessed by the first node is the second cell.

Optionally, as an implementation method, Operation Administration and Maintenance (OAM) can pre-configure the first network device and each node when each network device and each node enter the network. information. It is worth mentioning that OAM is used to manage all network devices including each network device and each node.

After step 503, the first network device may perform step 504. The first network device determines the identification of the target resource configuration according to the first information and the target resource configuration corresponding to the first node after accessing the target cell, wherein the first network device The multiple resource configurations in the message include the target resource configuration.

After the first network device determines the resource configuration that the first node can adopt after accessing the target cell, that is, after the target resource is configured, the first network device can determine the identification of the target resource configuration according to the target resource configuration and the first information, Afterwards, the first network device may perform step 505: after the first node accesses the target cell, the first network device sends the identification of the target resource configuration to the first node. Correspondingly, after accessing the target cell, the first node receives the identification of the target resource configuration from the first network device, and then the first node may perform step 506.

Step 506: The first node determines and validates the target resource configuration according to the identifier of the target resource configuration and the first information.

For example, after receiving the handover command from the second network device, the first node may initiate random access to the first network device corresponding to the target cell. If the random access of the first node in the target cell is successful, it means The first node successfully accesses the target cell. In addition, the first node determines the target resource configuration according to the identification of the target resource configuration and the first information.

After the first node successfully accesses the target cell, the first node can take effect on the target resource configuration.

Optionally, as an implementation manner, the identifier of the resource configuration in this application may be the index number (index) corresponding to the resource configuration.

Optionally, as an implementation manner, after determining the identifier of the target resource configuration, the first network device may send the identifier of the target resource configuration to the second network device.

Optionally, as an implementation manner, the first node includes an MT and a DU. After the first node accesses the target cell, the corresponding target resource configuration may include the first node's MT. After accessing the target cell, the first node's MT The resource configuration that can be adopted by the MT is the same as the resource configuration that can be adopted by the DU of the first node.

When the first node includes an MT and a DU, the target resource configuration corresponding to the first node after accessing the target cell in this application can be understood as: after the MT of the first node accesses the target cell, the first The resource configuration that the MT of the node can adopt in the cell generated by the parent node of the first node and the resource configuration that the DU of the first node can adopt in the cell generated by itself.

It is worth mentioning that in this application, the resource configuration that the MT of the first node can adopt in the cell generated by the parent node of the first node is the same as the resource configuration that the DU of the parent node of the first node can adopt in the same cell generated by itself. The resource configuration is the same.

Optionally, as an implementation manner, when sending the identification of the target resource configuration to the first node, the first network device may carry the identification of the target resource configuration in the radio resource control RRC message sent to the MT, or may The identification of the target resource configuration is carried in the message sent to the DU through the F1 interface.

Optionally, as an implementation manner, the target resource configuration may also include the resource configuration that the DU of the child node of the first node can adopt in the cell generated by the MT of the first node after switching to the target cell.

Based on the above method, by pre-configuring the association between multiple resource configurations and multiple identifiers to each network device and each node, when a cell handover occurs, the corresponding network device of the source cell (for example, the first network device) Only the identification of the resource configuration corresponding to the node after cell switching is sent to the node, thereby avoiding the delivery of complete resource configuration information to the node and reducing the amount of data that needs to be sent during cell switching. Compared with issuing complete resource configuration information when a cell switching occurs, This method can reduce the time required to issue resource configurations. Therefore, this method can improve the efficiency of migrating nodes. The contradiction between fast mobility and the time required to issue resource configuration information can improve the problem of data transmission interruption.

As for another communication method among the above-mentioned other communication methods provided by this application, FIG. 6 shows an exemplary flow chart of the method. The method at least includes the following steps.

Step 603: When the first network device determines that the first node is going to access the target cell, the first network device determines the target resource configuration corresponding to the first node after accessing the target cell. The target cell is the cell corresponding to the first network device. .

When determining that the first node will access the target cell, the first network device may determine the target resource configuration corresponding to the first node after accessing the target cell. Regarding the method for the first network device to determine the target resource configuration corresponding to the first node after accessing the target cell, please refer to the relevant description in the method shown in Figure 5. For the sake of brevity, details will not be described here.

If the first network device determines the target resource configuration corresponding to the first node after accessing the target cell through method 2 in the method shown in Figure 5, in this case, the method may also include steps before step 603. 601 and step 602.

Step 601: After determining that the first node is going to access the target cell, the second network device determines the first node based on the resource configuration and first information corresponding to the first node when the cell currently accessed by the first node is the second cell. When the currently accessed cell is the second cell, the identifier of the resource configuration corresponding to the first node. The first information indicates the association between multiple resource configurations and multiple identifiers. The multiple resource configurations include the first node currently accessed. The resource configuration corresponding to the first node when the cell is the second cell, the second cell is the cell that the first node accesses before accessing the target cell, and the target cell is the cell corresponding to the first network device.

For example, when the second network device decides to switch the cell currently accessed by the first node from the first cell to the target cell, the second network device may use the first information preconfigured by the OAM and the cell currently accessed by the first node as the second cell. The resource configuration that the first node can adopt when the cell is the cell, and the identification of the resource configuration that the first node can adopt when it is determined that the cell currently accessed by the first node is the second cell. After that, the second network device performs step 602: the second network device Send to the first network device an identifier of the resource configuration corresponding to the first node when the cell currently accessed by the first node is the second cell. Correspondingly, the first network device receives from the second network device an identifier of the resource configuration corresponding to the first node when the cell currently accessed by the first node is the second cell.

After step 603, the first network device may perform step 604. The first network device determines the identification of the target resource configuration according to the first information and the target resource configuration corresponding to the first node after accessing the target cell, wherein the first network device The multiple resource configurations in the message include the target resource configuration.

Step 605: The first network device sends the identification of the target resource configuration to the second network device. The target resource configuration is the resource configuration corresponding to the first node after accessing the target cell. Correspondingly, the second network device receives the identification of the target resource configuration from the first network device. Regarding the method for the first network device to determine the identification of the target resource configuration, please refer to the relevant description in the method shown in Figure 5. For the sake of brevity, details will not be described here.

Step 606: The second network device sends the identification of the target resource configuration to the first node. Correspondingly, in the process of accessing the target cell, the first node receives the identification of the target resource configuration from the second network device.

Afterwards, the first node may perform step 607: the first node determines and validates the target resource configuration according to the identifier of the target resource configuration and the first information. For the method for the first node to determine and take effect the target resource configuration, please refer to the relevant description in the method shown in Figure 5. For the sake of brevity, it will not be described again here.

Optionally, as an implementation manner, when the second network device sends the identifier of the target resource configuration to the first node, the second network device may carry the identifier of the target resource configuration in the RRC message sent to the MT of the first node, or, The identification of the target resource configuration may be carried in the message sent to the DU through the F1 interface.

Optionally, as an implementation manner, the RRC message carrying the identification of the target resource configuration sent by the second network device to the MT of the first node may be an independent RRC message, or the second network device may decide A handover command (Handover Command) message sent to the first node when switching the cell currently accessed by the first node from the second cell to the target cell.

Based on the above method, by preconfiguring the association between multiple resource configurations and multiple identifiers to each network device and each node, so that when a cell handover occurs, the corresponding network device (for example, the second network device) of the target cell Only the identification of the resource configuration corresponding to the node after cell switching is sent to the node, thereby avoiding the delivery of complete resource configuration information to the node and reducing the amount of data that needs to be sent during cell switching. Compared with issuing complete resource configuration information when a cell switching occurs, This method can reduce the time required to deliver resource configuration. Therefore, this method can improve the conflict between the rapid mobility of the migrating node and the time required to deliver resource configuration information, and can also improve the problem of data transmission interruption. .

It can be understood that, in order to implement the functions in the above embodiments, the network device and the terminal device include corresponding hardware structures and/or software modules that perform each function. Those skilled in the art should easily realize that the units and method steps of each example described in conjunction with the embodiments disclosed in this application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software driving the hardware depends on the specific application scenarios and design constraints of the technical solution.

Figures 7 and 8 are schematic structural diagrams of possible communication devices provided by embodiments of the present application. These communication devices can be used to implement the functions of the network device or the first node in the above method embodiments, and therefore can also achieve the beneficial effects of the above method embodiments. In the embodiment of the present application, the communication device may be an IAB-donor as shown in Figure 1, or an IAB-node as shown in Figure 1, or a module applied to IAB-donor or IAB-node. (such as chips).

As shown in FIG. 7 , the communication device 700 includes a processing unit 710 and a transceiver unit 720 .

Optionally, as an implementation manner, the communication device 700 is used to implement the function of the first network device or the first node in the method embodiment shown in FIG. 4 .

When the communication device 700 is used to implement the function of the first network device in the method embodiment shown in Figure 4: the processing unit 710 is used to: generate the first resource configuration information after the first node accesses the first cell, the The first resource configuration information indicates the resource configuration corresponding to the first node after switching to a neighboring cell of the first cell, and the first cell is any one of the cells corresponding to the first network device. The transceiver unit 720 is configured to: after the first node accesses the first cell, send the first resource configuration information to the first node.

When the communication device 700 is used to implement the functions of the first node in the method embodiment shown in Figure 4: the transceiver unit 720 is used to: receive the first resource from the first network device after the first node accesses the first cell. Configuration information, the first resource configuration information indicates the resource configuration corresponding to the first node after switching to a neighboring cell of the first cell, and the first cell is a cell corresponding to the first network device. any one of. The processing unit 710 is configured to: if the first node accesses the target cell, and the target cell is one of the neighboring cells of the first cell, validate the first resource configuration indicated by the first resource configuration information. The corresponding resource configuration of a node after accessing the target cell.

When the communication device 700 is used to implement the functions of the first network device or the first node in the method embodiment shown in Figure 4, a more detailed description of the processing unit 710 and the transceiver unit 720 can be directly referred to Figure 4 The relevant descriptions are obtained directly from the method embodiments and will not be described in detail here.

Optionally, as an implementation manner, the communication device 700 is used to implement the function of the first network device or the first node in the method embodiment shown in FIG. 5 .

When the communication device 700 is used to implement the function of the first network device in the method embodiment shown in Figure 5: the processing unit 710 is used to: when determining that the first node is going to access the target cell, determine that the first node is accessing the target cell. The target resource configuration corresponding to the target cell is entered, and the target cell is a cell corresponding to the first network device. The processing unit 710 is further configured to: determine an identifier of the target resource configuration according to the first information and the target resource configuration, where the first information indicates an association between multiple resource configurations and multiple identifiers, and the multiple resource configurations are A resource configuration includes the target resource configuration. The transceiving unit 720 is configured to: after the first node accesses the target cell, send the identification of the target resource configuration to the first node.

When the communication device 700 is used to implement the function of the first node in the method embodiment shown in Figure 5: the transceiver unit 720 is used to: receive the target resource from the first network device after the first node accesses the target cell. The identifier of the configuration, the target resource configuration is the resource configuration corresponding to the first node after accessing the target cell, and the target cell is the cell corresponding to the first network device. The processing unit 710 is configured to: determine and validate the target resource configuration according to the identifier of the target resource configuration and first information, the first information indicating the association between multiple resource configurations and multiple identifiers, the A plurality of resource configurations include the target resource configuration.

When the communication device 700 is used to implement the functions of the first network device or the first node in the method embodiment shown in Figure 5, a more detailed description of the processing unit 710 and the transceiver unit 720 can be directly referred to Figure 5 The relevant descriptions are obtained directly from the method embodiments and will not be described in detail here.

Optionally, as an implementation manner, the communication device 700 is used to implement the functions of the second network device or the first node in the method embodiment shown in FIG. 6 .

When the communication device 700 is used to implement the functions of the first network device in the method embodiment shown in Figure 6: the transceiver unit 720 is used to: receive the identification of the target resource configuration from the first network device, where the target resource configuration is the first network device. one node The corresponding resource configuration after accessing the target cell, the target cell is the cell corresponding to the first network device, wherein the cell currently accessed by the first node is the second cell, and the second cell is the The cell corresponding to the second network device. The transceiving unit 720 is configured to send the identification of the target resource configuration to the first node.

When the communication device 700 is used to implement the function of the first node in the method embodiment shown in Figure 6: the transceiver unit 720 is used to: receive the identification of the target resource configuration from the second network device during the process of accessing the target cell. , the target resource configuration is the resource configuration corresponding to the first node after accessing the target cell, and the target cell is a cell corresponding to the first network device. The processing unit 710 is configured to: determine and validate the target resource configuration according to the identifier of the target resource configuration and first information, the first information indicating the association between multiple resource configurations and multiple identifiers, the A plurality of resource configurations include the target resource configuration.

When the communication device 700 is used to implement the functions of the second network device or the first node in the method embodiment shown in Figure 6, a more detailed description of the processing unit 710 and the transceiver unit 720 can be directly referred to Figure 6 The relevant descriptions are obtained directly from the method embodiments and will not be described in detail here.

As shown in FIG. 8 , the communication device 800 includes a processor 810 and an interface circuit 820 . The processor 810 and the interface circuit 820 are coupled to each other. It can be understood that the interface circuit 820 may be a transceiver or an input-output interface. Optionally, the communication device 800 may also include a memory 830 for storing instructions executed by the processor 810 or input data required for the processor 810 to run the instructions or data generated after the processor 810 executes the instructions.

When the communication device 800 is used to implement the method shown in Figure 4, the processor 810 is used to perform the functions of the above-mentioned processing unit 710 when the communication device 700 is used to implement the method embodiment shown in Figure 4, and the interface circuit 820 is used to perform The above-mentioned functions of the transceiver unit 720 are used when the communication device 700 is used to implement the method embodiment shown in FIG. 4 .

When the communication device 800 is used to implement the method shown in Figure 5, the processor 810 is used to perform the functions of the above-mentioned processing unit 710 when the communication device 700 is used to implement the method embodiment shown in Figure 5, and the interface circuit 820 is used to perform The above-mentioned functions of the transceiver unit 720 are used when the communication device 700 is used to implement the method embodiment shown in FIG. 5 .

When the communication device 800 is used to implement the method shown in Figure 6, the processor 810 is used to perform the functions of the above-mentioned processing unit 710 when the communication device 700 is used to implement the method embodiment shown in Figure 6, and the interface circuit 820 is used to perform The above-mentioned functions of the transceiver unit 720 are used when the communication device 700 is used to implement the method embodiment shown in FIG. 6 .

When the above communication device is a chip applied to the first node, the first node chip implements the function of the first node in the above method embodiment. The first node chip receives information from other modules (such as radio frequency modules or antennas) in the first node, and the information is sent to the first node by the network device; or, the first node chip sends information to other modules in the first node. (such as a radio frequency module or antenna) sends information, which is sent by the first node to the network device.

When the above communication device is a chip applied to a network device, the network device chip implements the functions of the network device in the above method embodiment. The network device chip receives information from other modules in the network device (such as radio frequency modules or antennas), and the information is sent by the first node to the network device; or, the network device chip sends information to other modules in the network device (such as radio frequency modules) or antenna) to send information, which is sent by the network device to the first node.

During the implementation process, each step of the above method can be completed by instructions in the form of hardware integrated logic circuits or software in the processor. The steps of the method disclosed in this application can be directly implemented by a hardware processor, or executed by a combination of hardware and software modules in the processor. The software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.

It should be noted that the processor in this application may be an integrated circuit chip with signal processing capabilities. During the implementation process, each step of the above method embodiment can be completed through an integrated logic circuit of hardware in the processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. . Each method, step and logic block diagram disclosed in this application can be implemented or executed. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The steps of the method disclosed in this application can be directly implemented by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

It is understood that the memory in this application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, non-volatile memory can be read-only memory (ROM), programmable ROM (PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically removable memory. Erase electrically programmable read-only memory (EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which is used as an external cache. By way of illustration, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (direct rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

According to the method provided by this application, this application also provides a computer program product. The computer program product includes: computer program code. When the computer program code is run on a computer, it causes the computer to execute the steps shown in Figures 4 to 6. Each step or process executed by the first network device, the second network device or the first node in the embodiment.

According to the method provided by this application, this application also provides a computer-readable storage medium. The computer-readable storage medium stores program code. When the program code is run on a computer, it causes the computer to execute the steps shown in Figures 4 to 6. Each step or process executed by the first network device, the second network device or the first node in the embodiment shown.

According to the method provided by this application, this application also provides a communication system, which may include a first network device, a second network device and a first node.

The above-mentioned various device embodiments and method embodiments are completely corresponding to the embodiments shown in Figures 4 to 6, and the corresponding steps are performed by corresponding modules or units. For example, the communication unit (transceiver) performs receiving or transmitting in the method embodiment. The steps other than sending and receiving may be executed by the processing unit (processor). The functions of specific units may be based on corresponding method embodiments. There can be one or more processors.

In the embodiments of this application, each term and English abbreviation is an illustrative example given for convenience of description and should not constitute any limitation on this application. This application does not exclude the possibility of defining other terms that can achieve the same or similar functions in existing or future agreements.

In the embodiments of the present application, the first, second and various numerical numbers are only used to distinguish them for convenience of description and are not used to limit the scope of the present application. For example, distinguish different core network equipment, distinguish different attribute information, etc.

The terms "component", "module", "system", etc. used in this specification are used to refer to computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component may be, but is not limited to, a process, a processor, an object, an executable file, a thread of execution, a program and/or a computer running on a processor. Through the illustrations, both applications running on the computing device and the computing device may be components. One or more components can reside in a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers. Additionally, these components can execute from various computer-readable storage media having various data structures stored thereon. A component may, for example, be based on a signal having one or more data packets (eg, data from two components interacting with another component, a local system, a distributed system, and/or a network, such as the Internet, which interacts with other systems via signals) Communicate through local and/or remote processes.

It should be understood that “at least one” in this article refers to one or more, and “plurality” refers to two or more. "And/or" describes the association of associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the related objects are in an "or" relationship. "At least one of the following" or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items). For example, at least one of a, b and c can mean: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c, where a, b, c can be single or multiple.

Those of ordinary skill in the art will appreciate that the various illustrative logical blocks and steps described in connection with the embodiments disclosed herein can be implemented as electronic hardware, or a combination of computer software and electronic hardware. accomplish. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can be based on the corresponding processes in the foregoing method embodiments, and will not be described again here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit.

In the above embodiments, the functions of each functional unit may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions (programs). When the computer program instructions (program) are loaded and executed on a computer, the processes or functions described in this application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may To be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center via a wireline (e.g. Coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means to transmit to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more available media integrated. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, solid state disk (SSD)), etc.

If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program code. .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application. should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A communication method, characterized in that the method is executed by a first network device, including:

After the first node accesses the first cell, first resource configuration information is sent to the first node, and the first resource configuration information indicates the location of the first node after switching to a neighboring cell of the first cell. Corresponding resource configuration, the first cell is any one of the cells corresponding to the first network device.
The method according to claim 1, characterized in that the first resource configuration information also indicates the resource configuration corresponding to the first node after accessing the first cell.
The method according to claim 1 or 2, characterized in that the first node is an integrated access backhaul IAB node, including a mobile terminal MT and a distributed unit DU, and the corresponding resource configuration includes the information provided by the MT. The corresponding resource configuration is the resource configuration corresponding to the DU.
The method according to claim 3, characterized in that the first resource configuration information is carried in a radio resource control RRC message sent to the MT, or the first resource configuration information is carried in an RRC message sent through the F1 interface. message to the DU.
The method according to any one of claims 1 to 4, characterized in that the first node is an integrated access backhaul IAB node, and the method further includes:

Receive second resource configuration information from other network devices. The second resource configuration information indicates the resource configuration corresponding to any IAB node after accessing the cell corresponding to the other network device. The cell corresponding to the other network device is the same as Cells corresponding to the first network device are neighboring cells to each other.
The method according to any one of claims 1 to 5, characterized in that the method further includes:

Send third resource configuration information to other network devices, the third resource configuration information indicating the corresponding resource configuration after the node accesses the cell corresponding to the first network device, and the cell corresponding to the other network device is the same as the third resource configuration information. Cells corresponding to a network device are neighboring cells to each other.
A communication method, characterized in that the method is executed by a first node, including:

After the first node accesses the first cell, it receives first resource configuration information from the first network device. The first resource configuration information indicates what the first node will do after switching to a neighboring cell of the first cell. Corresponding resource configuration, the first cell is any one of the cells corresponding to the first network device;

If the first node accesses the target cell, and the target cell is one of the neighboring cells of the first cell, the first node takes effect on the first resource configuration indicated by the first resource configuration information. The corresponding resource configuration of the node after accessing the target cell.
The method according to claim 7, wherein the first resource configuration information also indicates the resource configuration corresponding to the first node after accessing the first cell, and the method further includes:

After the first node accesses the first cell, the first node takes effect the resource configuration corresponding to the first node after accessing the first cell indicated by the first resource configuration information. .
The method of claim 7, further comprising:

The first node caches the first resource configuration information.
The method according to any one of claims 7 to 9, characterized in that the first node is an integrated access backhaul IAB node, including a mobile terminal MT and a distributed unit DU, and the first resource configuration information Including that after the MT is handed over to a neighboring cell of the first cell, the resource configuration corresponding to the MT is the same as the resource configuration corresponding to the DU. Source configuration.
The method according to claim 10, characterized in that the first resource configuration information is carried in an RRC message received by the MT, or the first resource configuration information is carried in an RRC message received by the DU through the F1 interface. in the news.
A communication device, characterized in that it includes a processor and an interface circuit. The interface circuit is used to receive signals from other communication devices other than the communication device and transmit them to the processor or to transmit signals from the processor. The signal is sent to other communication devices other than the communication device, and the processor is used to implement the method according to any one of claims 1 to 6 through logic circuits or execution of code instructions.
A communication device, characterized in that it includes a processor and an interface circuit. The interface circuit is used to receive signals from other communication devices other than the communication device and transmit them to the processor or to transmit signals from the processor. The signal is sent to other communication devices other than the communication device, and the processor is used to implement the method according to any one of claims 7 to 11 through logic circuits or execution of code instructions.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores computer instructions. When the computer instructions are run on a communication device, the communication device causes the communication device to execute any of claims 1 to 6. method described in one item.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores computer instructions. When the computer instructions are run on a communication device, the communication device causes the communication device to execute any of claims 7 to 11. The method described in one item.