WO2021218938A1

WO2021218938A1 - Resource coordination method and device

Info

Publication number: WO2021218938A1
Application number: PCT/CN2021/090069
Authority: WO
Inventors: 朱元萍; 刘菁; 卓义斌; 戴明增
Original assignee: 华为技术有限公司
Priority date: 2020-04-28
Filing date: 2021-04-26
Publication date: 2021-11-04
Also published as: CN113573408A

Abstract

A resource coordination method and device. The method comprises: a first IAB node determining a first cell having a resource configuration that needs to be coordinated, and a serving node to which the first cell belongs; and sending a first message to the serving node via a wireless backhaul link or via a sidelink between the first IAB node and the serving node, the first message being used to request the serving node to adjust the resource configuration of the first cell. In this way, when the first IAB node needs to perform resource coordination with a serving node to which a neighboring cell belongs, the first IAB node can directly determine a target of resource coordination, and sends to the target of resource coordination, via a wireless backhaul link or a sidelink between IAB nodes, a first message requesting an adjustment of a resource configuration, thereby enabling quick resource coordination between IAB nodes.

Description

Method and device for resource coordination

Cross-references to related applications

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office of China, the application number is 202010349026.2, and the application name is "a method and device for resource coordination" on April 28, 2020, the entire content of which is incorporated herein by reference Applying.

Technical field

This application relates to the field of wireless communication technology, and in particular to a resource coordination method and device.

Background technique

In an integrated access and backhaul (IAB) network, the resource configuration of an IAB node is usually performed by an IAB host node. The IAB host node can send radio resource control (radio resource control, RRC) messages or F1 applications. A protocol (F1 application protocol, F1AP) message and other methods are used to send control signaling for resource coordination to the IAB node. This centralized control method can configure resources for different IAB nodes from the perspective of the overall network controlled by the IAB host node to avoid interference between IAB nodes, but due to the actual networking, the IAB host node may not Real-time understanding of the interaction between the subordinate IAB nodes, so it is impossible to adjust the resource configuration of each IAB node in time, and quickly respond to the coordination needs between IAB nodes.

Summary of the invention

The embodiments of the present application provide a resource coordination method and device, which are used to realize fast and efficient resource coordination between IAB nodes.

In the first aspect, embodiments of the present application provide a resource coordination method, which may be executed by a first IAB node, or may be executed by a component (for example, a chip or a circuit) configured in the first IAB node. The method may include: the first IAB node determines the first cell that needs to coordinate resource configuration, the first IAB node determines the serving node to which the first cell belongs, and the first IAB node communicates with the first IAB node through a wireless backhaul link or The side link between the serving nodes sends a first message to the serving node, where the first message is used to request the serving node to adjust the resource configuration of the first cell.

In the embodiment of this application, when the first IAB node needs to coordinate resources with the serving node to which the neighboring cell belongs, the first IAB node can directly determine the target of resource coordination and use the wireless backhaul link or the side between the IAB nodes. The uplink sends the first message for requesting adjustment of the resource configuration to the target of resource coordination, so that rapid resource coordination between IAB nodes can be realized.

In a possible design of the first aspect, the serving node may be the second IAB node or the IAB host node; the method further includes: when the serving node is the second IAB node, the first IAB node uses the wireless backhaul chain Or the side link sends a first message to the second IAB node, and the side link is a wireless direct communication link between the MT part of the first IAB node and the MT part of the second IAB node Or, when the serving node is the IAB host node, the first IAB node sends the first message to the IAB host node through the wireless backhaul link.

In the embodiment of this application, there is a wireless backhaul link between the IAB nodes. At the same time, since the IAB node includes the MT part, the side link can also be established between the MT part of the IAB node. In this way, the first IAB node can pass the IAB The wireless backhaul link or side link between nodes transmits the above-mentioned first message, thereby effectively improving the flexibility of the method.

In a possible design of the first aspect, the method further includes: the first IAB node receives first configuration information and/or second configuration information from the IAB host node, where the first configuration information includes the information of the first IAB node The identity of each child node, and the identity of one or more cells served by each child node, the second configuration information includes the identity of the parent node of the first IAB node, and one or more cells served by the parent node Of the logo. Correspondingly, the first IAB node determining the serving node to which the first cell belongs may be that the first IAB node determines the serving node to which the first cell belongs according to the first configuration information and/or the second configuration information.

In a possible design of the first aspect, the identifier of the child node includes one or more of the following: the BAP layer address of the child node, the cell wireless network temporary identifier C assigned by the first IAB node to the child node -RNTI, the combination of the C-RNTI allocated by the first IAB node for the child node and the cell identifier of the cell where the child node accesses the first IAB node, and the layer 2 identifier of the child node in the side link;

The identifier of the parent node includes one or more of the following: the BAP layer address of the parent node, the identifier of the DU part of the distributed unit of the parent node, and the C-RNTI allocated by the grandparent of the first IAB node to the parent node A combination with the cell ID of the cell that the parent node accesses in the grandparent node, and the layer 2 ID of the parent node in the side link.

In a possible design of the first aspect, the method further includes: the first IAB node sends a first request message to the IAB host node. The first request message may include the identifier of the first IAB node. The first request message is used to request first configuration information and/or second configuration information.

In the embodiment of the present application, through the first configuration information, the first IAB node can know the correspondence between each of its child nodes and one or more cells served by the child node. Through the second configuration information, the first IAB node You can know the correspondence between each parent node of your own and one or more cells served by the parent node. In this way, if there is a connection relationship between the serving node to which the first cell belongs and the first IAB node, that is, the first cell The attributable serving node is a child node or a parent node of the first IAB node, and the first IAB node may determine the serving node to which the first cell belongs according to the first configuration information and/or the second configuration information.

In a possible design of the first aspect, the method further includes: the first IAB node receives third configuration information from the IAB host node, where the third configuration information includes at least one neighboring cell belonging to the first IAB node The identifier of the serving node, the identifier of the serving node includes the BAP layer address of the serving node, and/or the layer 2 identifier of the serving node in the side link. Correspondingly, the first IAB node determining the serving node to which the first cell belongs may be that the first IAB node determines the serving node to which the first cell belongs according to the third configuration information.

In a possible design of the first aspect, the method further includes: the first IAB node sends a second request message to the IAB host node, where the second request message is used to request the third configuration information.

In a possible design of the first aspect, the second request message includes at least one identifier of the neighboring cell.

In a possible design of the first aspect, the second request message includes a measurement report from the MT part of the first IAB node, and the measurement report includes at least one identifier of the neighboring cell and at least one of the neighboring cells. The measurement result corresponding to each neighboring cell; or, the method further includes: the first IAB node sends a measurement report to the IAB host node.

In a possible design of the first aspect, a measurement result corresponding to each neighboring cell in at least one of the neighboring cells in the measurement report is greater than a first set threshold.

In the embodiment of this application, the first IAB node may send the identity of at least one neighboring cell to the IAB donor node, and request the IAB donor node to provide the identity of the serving node to which each neighboring cell of the at least one neighboring cell belongs. In this way, the IAB The host node may feed back the third configuration information to the first IAB node, and then determine the service node that needs to perform resource coordination according to the third configuration information.

In a possible design of the first aspect, the method further includes: the first IAB node receives a system broadcast message of the first cell, the system broadcast message includes the identity of the serving node to which the first cell belongs, and the serving node The identifier of includes the BAP layer address of the backhaul adaptation protocol of the serving node, and/or the layer 2 identifier of the serving node in the side link.

In the embodiment of the present application, each node in the IAB network can carry its own identity in the system broadcast message of the cell under its jurisdiction. In this way, the first IAB node can learn the information of the serving node of the first cell that needs to perform resource coordination by listening to the system broadcast message of the first cell.

In a possible design of the first aspect, the method further includes: the first IAB node receives a reference signal from the first cell, and the received power of the reference signal is greater than or equal to a second set threshold.

In a possible design of the first aspect, the resource configuration includes one or more of the following: transmission power configuration, uplink and downlink transmission subframe configuration, synchronization signal, and physical broadcast channel block configuration.

For the beneficial effects in various possible designs from the second aspect to the fifth aspect below, reference may be made to the corresponding description on the side of the first IAB node, which will not be repeated in the following.

In the second aspect, the embodiments of the present application provide another resource coordination method, which may be executed by an IAB host node, or may be executed by a component (such as a chip or a circuit) configured on the IAB host node. The method may include: the IAB host node generates first configuration information and/or second configuration information, where the first configuration information includes the identification of each child node of the first IAB node and the information of one or more cells served by each child node. The second configuration information includes the identity of the parent node of the first IAB node and the identity of one or more cells served by the parent node; the IAB host node sends the first configuration information and/or the first configuration information to the first IAB node 2. Configuration information.

In a possible design of the second aspect, the identifier of the child node includes one or more of the following: the BAP layer address of the child node, the cell wireless network temporary identifier C assigned by the first IAB node to the child node -RNTI, the combination of the C-RNTI allocated by the first IAB node for the child node and the cell identifier of the cell where the child node accesses the first IAB node, and the layer 2 identifier of the child node in the side link;

The identifier of the parent node includes one or more of the following: the BAP layer address of the parent node, the identifier of the DU part of the distributed unit of the parent node, the C-RNTI assigned by the grandparent node of the first IAB node to the parent node, and The combination of the cell identity of the parent node in the cell accessed by the grandparent node, and the layer 2 identity of the parent node in the side link.

In a possible design of the second aspect, the method further includes: the IAB host node receives the first request message from the first IAB node. The first request message may include the identifier of the first IAB node. The first request message is used to request first configuration information and/or second configuration information.

In a possible design of the second aspect, the method further includes: the IAB host node sends third configuration information to the first IAB node, where the third configuration information includes the service to which at least one neighboring cell of the first IAB node belongs The identifier of the node, the identifier of the serving node includes the BAP layer address of the serving node, and/or the layer 2 identifier of the serving node in the side link, which is the wireless connection between the MT part of the IAB node Direct communication link.

In a possible design of the second aspect, the method further includes: the IAB host node receives a second request message from the first IAB node, where the second request message is used to request the third configuration information.

In a possible design of the second aspect, the second request message includes an identifier of at least one neighboring cell.

In a possible design of the second aspect, the second request message includes a measurement report of the MT part of the first IAB node, and the measurement report includes an identifier of at least one neighboring cell and each of the at least one neighboring cell. The measurement result corresponding to the neighboring cell; or, the method further includes: the IAB donor node receives the measurement report from the first IAB node or the terminal device served by the first IAB node.

In a possible design of the second aspect, the measurement result corresponding to each neighboring cell in the at least one neighboring cell in the measurement report is greater than the first set threshold.

In the third aspect, the embodiments of the present application provide another resource coordination method, which may be executed by an IAB host node, or may be executed by a component (such as a chip or a circuit) configured on the IAB host node. The method may include: the IAB host node sends third configuration information to the first IAB node, where the third configuration information includes the identity of the serving node to which at least one neighboring cell of the first IAB node belongs, and the identity of the serving node includes the service The BAP layer address of the node, and/or the layer 2 identifier of the serving node in the side link, which is the wireless direct communication link between the MT parts of the IAB node.

In a possible design of the third aspect, the method includes: the IAB host node receives a second request message from the first IAB node, where the second request message is used to request the third configuration information.

In a possible design of the third aspect, the second request message includes the identity of the at least one neighboring cell.

In a possible design of the third aspect, the second request message includes a measurement report of the MT part of the first IAB node, and the measurement report includes the identifier of the at least one neighboring cell and the at least one neighboring cell. The measurement result corresponding to each neighboring cell in the cell; or, the method further includes: the IAB donor node receives the measurement report from the first IAB node or the terminal device served by the first IAB node.

In a possible design of the third aspect, the measurement result corresponding to each neighboring cell in the at least one neighboring cell in the measurement report is greater than the first set threshold.

In a fourth aspect, embodiments of the present application provide another resource coordination method, which may be executed by an IAB host node, or may be executed by a component (such as a chip or a circuit) configured on the IAB host node. The method may include: the IAB host node generates a system broadcast message, the system broadcast message includes the identifier of the IAB host node, the identifier of the IAB host node includes the BAP layer address of the IAB host node; the IAB host node is in the first cell served The system broadcast message is sent in.

In the fifth aspect, the embodiments of the present application also provide another resource coordination method. The solution may be executed by the second IAB node, or may be executed by a component (such as a chip or a circuit) configured in the second IAB node. The method may include: a second IAB node generates a system broadcast message, the system broadcast message includes an identifier of the second IAB node, the identifier of the second IAB node includes the BAP layer address of the second IAB node, and/or the The second IAB node’s layer 2 identification in the side link is the wireless direct communication link between the MT part of the IAB node; the second IAB node sends this in the first cell it serves The system broadcasts messages.

In a sixth aspect, the present application provides a communication device that has the function of implementing the first IAB node in the first aspect or any one of the possible designs of the first aspect. The device may be the first IAB node, or a chip or circuit included in the first IAB node.

The device may also have the function of implementing the IAB host node in any possible design of the second aspect or the second aspect, or have the IAB host node in any possible design of the third aspect or the third aspect. The function of the IAB host node in any possible design of the fourth aspect or the fourth aspect mentioned above. The device may be an IAB host node, or a chip or circuit included in the IAB host node.

The device may also have the function of realizing the second IAB node in any possible design of the fifth aspect or the fifth aspect. The device may be a chip or a circuit included in the second IAB node.

The functions of the above-mentioned communication device may be realized by hardware, or may be realized by hardware executing corresponding software. The hardware or software includes one or more modules or units or means corresponding to the above-mentioned functions.

In a possible design, the structure of the device includes a processing module and a transceiver module, wherein the processing module is configured to support the device to execute the first aspect or the first IAB node corresponding to any one of the first aspects in the design. Or perform the corresponding function of the IAB host node in any of the above-mentioned second aspect or the second aspect, or perform the corresponding function of the IAB host node in the above-mentioned third aspect or any of the possible designs of the third aspect , Or perform the corresponding function of the IAB host node in any possible design of the fourth aspect or the fourth aspect, or perform the corresponding function of the second IAB node in any possible design of the fifth aspect or the fifth aspect Function. The transceiver module is used to support communication between the device and other communication devices. For example, when the device is the first IAB node, it can send the first message to the serving node to which the first cell belongs. The communication device may also include a storage module, which is coupled with the processing module, which stores program instructions and data necessary for the device. As an example, the processing module may be a processor, the communication module may be a transceiver, and the storage module may be a memory. The memory may be integrated with the processor or may be provided separately from the processor, which is not limited in this application.

In another possible design, the structure of the device includes a processor and may also include a memory. The processor is coupled with the memory, and can be used to execute the computer program instructions stored in the memory, so that the device executes the above-mentioned first aspect or any one of the possible design methods of the first aspect, or executes the above-mentioned second aspect or the second aspect. The method in any possible design of the aspect, or the method in any possible design of the above third aspect or the third aspect, or the method in any possible design of the fourth aspect or the fourth aspect above Or implement any one of the possible design methods of the fifth aspect or the fifth aspect described above. Optionally, the device further includes a communication interface, and the processor is coupled with the communication interface. When the device is an IAB node or an IAB host node, the communication interface can be a transceiver or an input/output interface; when the device is an IAB node or a chip contained in an IAB host node, the communication interface can be the input/output of the chip interface. Optionally, the transceiver may be a transceiver circuit, and the input/output interface may be an input/output circuit.

In a seventh aspect, an embodiment of the present application provides a chip system, including: a processor, the processor is coupled with a memory, the memory is used to store a program or instruction, when the program or instruction is executed by the processor , Enabling the chip system to implement the method in any possible design of the first aspect or the first aspect, or implement the method in any possible design of the second aspect or the second aspect, or implement the method in the foregoing first aspect The method in any possible design of the third aspect or the third aspect, or the method in any possible design of the foregoing fourth aspect or the fourth aspect, or the realization of any of the foregoing fifth aspect or the fifth aspect A possible design approach.

Optionally, the chip system further includes an interface circuit, which is used to exchange code instructions to the processor.

Optionally, there may be one or more processors in the chip system, and the processors may be implemented by hardware or software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like. When implemented by software, the processor may be a general-purpose processor, which is implemented by reading software codes stored in the memory.

Optionally, there may be one or more memories in the chip system. The memory may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application. Exemplarily, the memory may be a non-transitory processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip, or may be set on different chips. The setting method of the processor is not specifically limited.

In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium on which a computer program or instruction is stored. When the computer program or instruction is executed, the computer executes the first aspect or any one of the first aspect. A possible design method, or implementation of any one of the foregoing second aspect or second aspect, or implementation of any one of the foregoing third aspect or third aspect, Or implement the method in any possible design of the foregoing fourth aspect or the fourth aspect, or implement the method in any possible design of the foregoing fifth aspect or the fifth aspect.

In a ninth aspect, the embodiments of the present application provide a computer program product. When the computer reads and executes the computer program product, the computer executes the first aspect or any one of the possible design methods in the first aspect, Or implement the method in any possible design of the above second aspect or the second aspect, or implement the method in any possible design of the above third aspect or the third aspect, or implement the fourth or first aspect above The method in any possible design of the four aspects, or the method in any possible design of the fifth aspect or the fifth aspect described above.

In a tenth aspect, an embodiment of the present application provides a communication system. The communication system includes a first IAB node, an IAB host node and/or a second IAB node. Optionally, the communication system further includes at least one terminal device served by the first IAB node.

Description of the drawings

FIG. 1 is a schematic diagram of a network architecture of an IAB network to which an embodiment of this application applies;

Figure 2 is a schematic diagram of an independent networking scenario of an IAB network to which an embodiment of the application applies;

FIG. 3 is a schematic diagram of a non-independent networking scenario of an IAB network to which an embodiment of the application is applicable;

FIG. 4 is a schematic flowchart of a resource coordination method provided by an embodiment of this application;

FIG. 5 is a schematic diagram of a first possible implementation manner of determining the serving node to which the first cell belongs according to an embodiment of the application; FIG.

FIG. 6 is a schematic diagram of a second possible implementation manner of determining the serving node to which the first cell belongs according to an embodiment of the application;

FIG. 7 is a schematic diagram of a fourth possible implementation manner of determining the serving node to which the first cell belongs according to an embodiment of the application;

FIG. 8 is a schematic diagram of side links between MT parts of IAB nodes in an embodiment of this application;

FIG. 9 is a schematic diagram of a routing table configured in an IAB node in an embodiment of the application;

FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of this application;

FIG. 11 is a schematic diagram of another structure of a communication device provided by an embodiment of this application.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, and LTE time division duplex (time division duplex, LTE) systems. TDD), the fifth generation (5G) mobile communication system or the new radio (NR) system, or applied to future communication systems or other similar communication systems.

The embodiments of this application can be applied to integrated access and backhaul (IAB) network technology. Both the access link and the backhaul link in the IAB network use wireless transmission solutions to avoid fiber deployment, thereby reducing deployment costs and improving deployment flexibility.

Please refer to FIG. 1, which is a schematic diagram of a network architecture of an IAB network to which an embodiment of this application is applicable. The network architecture includes two types of network nodes, namely an IAB node (IAB node) 101 and an IAB donor node (IAB donor) 102. In addition, the network architecture may also include a terminal device 103 and a core network device 104.

In the IAB network, IAB nodes can provide wireless access services and backhaul services for terminal devices. The business data of the terminal devices can be transmitted by one or more IAB nodes connected to the IAB host node through wireless backhaul links. The IAB host node An interface can be established with the core network equipment to transmit terminal service data or control plane messages.

In the embodiment of the present application, the IAB node may include two parts: a mobile terminal (MT) part and a distributed unit (DU). When the IAB node faces its parent node (that is, the last hop node of the IAB node), it can be regarded as a terminal device, that is, as the role of MT; when the IAB node faces its child node (that is, the next hop node of the IAB node) When a node, the child node may be another IAB node or a terminal device), it can be regarded as a network device that provides a backhaul service for the child node, that is, it acts as a DU. The MT part of the IAB node may have part or all of the functions of the terminal device. The DU part of the IAB node can include the functions of the physical layer (physical, PHY)/medium access control (MAC) layer/radio link control (RLC) layer, and communicate with the child nodes for The child nodes provide access services. When the child node is another IAB node, a backhaul adaptation protocol (BAP) layer may also be included above the RLC layer. It should be understood that the IAB node may also be called a relay node (RN). When applied in a home access scenario, the IAB node may also be called a customer premises equipment (CPE), and the IAB node may also Other names are not limited in this application. For ease of description, they are all referred to as IAB nodes below.

In the embodiment of the present application, the IAB host node may be connected to the core network (for example, connected to the 5G core network) network element serving the terminal device through a wired link or a wireless link, and provide wireless backhaul for the IAB node Function. It should be understood that the IAB host node may also be referred to as an IAB donor (donor), a donor node (donor node), or a donor base station (Donor gNodeB, DgNB), etc., unless otherwise specified in the embodiments of the present application, the above names are all Refers to the same device. For ease of description, all are referred to as IAB host nodes below.

In one design, the IAB host node may be an access network element with complete base station functions. For example, the IAB host node may include a radio network controller (RNC) and a node B (Node B, NB). , Base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), base band unit (BBU), etc. , May also include the evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in the evolved LTE system (LTE-Advanced, LTE-A), or may also include the fifth generation mobile communication technology (5th generation, 5G) The next generation node B (gNB) in the new radio (NR) system, etc.

In another design, the IAB host node may also be a separate access network network element including a centralized unit (CU) part and a DU part. Among them, the CU part of the IAB host node can include the functions of the packet data convergence protocol (PDCP) layer/RRC layer, which is used to perform RRC control on all IAB nodes and connected terminal devices under the IAB host node , The DU part of the IAB host node may include the functions of the PHY/MAC/RLC layer, which is used to provide access functions for the child nodes or terminal devices under the IAB host node. For ease of presentation, the centralized unit of the IAB host node can be referred to as IAB donor CU, and the distributed unit of the IAB host node can be referred to as IAB donor DU. IAB donor CU may also be the control plane (CP) and The form of user plane (UP) separation, for example, IAB donor CU can be composed of one CU-CP (or IAB donor CU CP for short) and one (or more) CU-UP (or IAB donor CU UP for short) .

In the embodiment of the present application, the terminal device is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; also on water (such as ships, etc.); It can be deployed in the air (for example, on airplanes, balloons, satellites, etc.). The terminal device can communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN.

Terminal equipment can also be called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, wireless communication equipment, user agent or User device. In practical applications, the terminal devices in the embodiments of the present application may be mobile phones, tablet computers (Pad), computers with wireless transceiver functions, virtual reality (VR) terminal devices, augmented reality (augmented) Reality, AR) terminal equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, and wireless terminals in smart grids Terminals, wireless terminals in transportation safety, wireless terminals in smart cities, and wireless terminals in smart homes.

The terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices. It is a general term for using wearable technology to intelligently design everyday wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a kind of hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring. The terminal can also be virtual reality (VR) equipment, augmented reality (AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving (self-driving), remote surgery Wireless terminals in (remote medical surgery), wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, and smart homes Wireless terminals, etc.

The terminal device may also be a vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip, or vehicle-mounted unit built into the vehicle as one or more components or units. The vehicle passes through the built-in vehicle-mounted module, vehicle-mounted module, and vehicle-mounted Components, on-board chips, or on-board units can implement the method of the present application.

In the embodiments of the present application, the functions of the terminal device may also be implemented by hardware components (for example, a chip or a circuit, etc.) provided in the terminal device, which is not limited in the present application.

It should be noted that in the network architecture shown in Figure 1, although only one IAB node, one IAB host node, one terminal device, and one core network device are shown, it should be understood that the network architecture is only the IAB network As an example, during specific implementation, the embodiment of the present application does not limit the number of core network devices, the number of IAB nodes, the number of IAB host nodes, and the number of terminal devices included in the IAB network.

Taking into account the small coverage of the high frequency band, in order to ensure the coverage performance of the network, the IAB network can adopt a multi-hop network. In addition, taking into account the requirements of service transmission reliability, IAB nodes can support dual connectivity (DC) or multi-connectivity to cope with possible abnormal situations in the backhaul link, such as link failure. Abnormalities such as interruption or blockage and load fluctuation improve the reliability of transmission. When the IAB network supports multi-hop and multi-connection networking, there may be multiple transmission paths between the terminal device and the IAB host node. On a path, there is a certain hierarchical relationship between IAB nodes and between IAB nodes and IAB host nodes. Each IAB node regards the node providing the backhaul service as its parent node. Accordingly, each IAB node Can be regarded as a child node of its parent node.

In the embodiments of the present application, the communication link between the IAB nodes and the communication link between the IAB node and the IAB host node may be referred to as a wireless backhaul link, and the communication link between the IAB node and the terminal device may be referred to as It is a wireless access link.

The connection relationship between the IAB node and the IAB host node is called network topology or topology information. In the embodiments of this application, the IAB network can support two types of network topologies, namely a tree-based topology and a directed acyclic graph. In a tree topology IAB network, each IAB node has only one parent node and can have one or more child nodes; in a directed acyclic graph topology IAB network, each IAB node can have one or two parent nodes , Can have one or more child nodes. However, it should be noted that whether it is a tree topology or a directed acyclic graph topology, the data transmission in the IAB network is directional, that is, the upstream data packet will be sent from the child node to the parent node, and the parent node will then send it to the grandfather node. , Until it is forwarded to the IAB host node; the data packet in the downstream direction will be sent from the parent node to the child node, and then sent from the child node to the grandson node, until it is sent to the target IAB node.

Please refer to FIG. 2, which is a schematic diagram of a standalone (SA) scenario of an IAB network provided by an embodiment of this application. The independent networking scenario means that both the IAB node and the terminal device establish a connection with the network through the air interface of the same communication standard (for example, the NR standard).

Specifically, in Figure 2, the parent node of IAB node 1 is the IAB host node, IAB node 1 is the parent node of IAB node 2 and IAB node 3, and IAB node 2 and IAB node 3 are both the parent node of IAB node 4. In addition, IAB node 2 is also the parent node of IAB node 5. The uplink data of the terminal device is transmitted to the IAB host node through one or more IAB nodes, and then sent by the IAB host node to the mobile network element device (for example, the user plane function (UPF) network element in the 5G core network) . The downlink data packet of the terminal device is received by the IAB host node from the mobile gateway device, and then sent to the terminal device through one or more IAB nodes.

It should be noted that the independent networking scenario shown in Figure 2 is only exemplary. In the scenario where multi-hop and dual-connection or multi-connection are combined, there are more possibilities, such as the one shown in Figure 2. The shown IAB host node can also form a dual connection with an IAB node under another IAB host node to provide services for terminal devices. There are many similar examples, so I won't list them all here.

Please refer to FIG. 3, which is a schematic diagram of a non-standalone (NSA) scenario of an IAB network provided by an embodiment of this application. The non-independent networking scenario refers to that the IAB node and the terminal device establish a connection with the network through the air interface of two or more communication standards.

Specifically, in Figure 3, the IAB node supports 4G and 5G network dual connectivity, that is, the evolved universal land surface radio access and the new air interface dual connectivity (E-UTRAN NR Dual Connectivity, EN-DC), where the LTE base station eNB As the main base station, it provides LTE air interface (LTE Uu) connections for IAB nodes, and establishes an S1 interface with the 4G core network evolved packet core (EPC) for user plane and control plane transmission. The IAB host node is a secondary base station, which provides an NR air interface (NR Uu) connection for the IAB node, and establishes an S1 interface with the core network EPC for user plane transmission. Similarly, the UE also supports EN-DC. The UE connects to the primary base station eNB through the LTE Uu interface, and connects to the secondary base station IAB node through the NR Uu interface. The secondary base station of the UE can also be an IAB donor node.

It should be noted that the non-independent networking scenario shown in FIG. 3 may also be referred to as the EN-DC networking scenario of the IAB, and this networking scenario is only an example of the non-independent networking scenario. It should be understood that multi-hop networking can also be supported in the non-independent networking scenario, that is, the IAB node is connected to the IAB host node (specifically, the IAB host) via at least one intermediate IAB node (or through a multi-hop wireless backhaul link). The DU of the node, that is, IAB donor DU).

The embodiment of the application also involves the concept of the BAP layer. The BAP layer refers to a new protocol layer introduced in the wireless backhaul link in the IAB network-backhaul adaptation protocol (BAP) Layer, the protocol layer is located above the RLC layer and below the PDCP layer, used to implement the routing of data packets on the wireless backhaul link, as well as functions such as bearer mapping.

The embodiments of this application also involve the concept of sidelink (SL). The sidelink usually refers to the communication link established between terminal devices of the same type. The D2D port or PC5 port can refer to one of the terminal devices. The wireless communication interface for direct communication between the terminals, through the D2D port or the PC5 port, does not need to forward data between the terminal devices through the cellular communication network, thereby realizing direct data exchange. In an IAB network, the side link may refer to a wireless direct communication link established between MT parts between IAB nodes. The side link may also be called a side link, an auxiliary link, or a side link, or have other names, which is not limited in this application. It should be understood that the BAP layer can also be introduced into the side link. The BAP layer is located above the RLC layer and below the PDCP layer, and is used to implement functions such as data packet routing and bearer mapping on the side link.

Some scenarios in the embodiments of this application are described by taking the IAB scenario in a wireless communication network as an example. It should be noted that the technical solutions in the embodiments of this application can also be applied to other wireless communication networks, and the corresponding names can also be used. Replace the names of corresponding functions in other wireless communication networks.

It should be understood that the network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art can know that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

It should be noted that the terms "system" and "network" in the embodiments of the present application can be used interchangeably. "Multiple" refers to two or more than two. In view of this, "multiple" may also be understood as "at least two" in the embodiments of the present application. "At least one" can be understood as one or more, for example, one, two or more. For example, including at least one means including one, two or more, and it does not limit which ones are included. For example, if at least one of A, B, and C is included, then A, B, C, A and B, A and C, B and C, or A and B and C are included. In the same way, the understanding of "at least one" and other descriptions is similar. "And/or" describes the association relationship of the associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone. In addition, the character "/", unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

Unless otherwise stated, ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the order, timing, priority, or importance of multiple objects. In addition, the descriptions of "first" and "second" do not limit the objects to be different.

Please refer to FIG. 4, which is a schematic flowchart of a resource coordination method provided by an embodiment of this application. The method specifically includes the following steps:

Step S401: The first IAB node determines the first cell that needs to coordinate resource configuration.

In the embodiment of the present application, the first IAB node is an IAB node in the IAB network, and the second IAB node is another IAB node in the IAB network that is different from the first IAB node. The first IAB node and the second IAB node are both It can be connected to the IAB host node through a one-hop or multi-hop wireless backhaul link.

In step S401, the first IAB node may determine as the first cell a cell that causes interference to itself or a terminal device it serves that exceeds a certain level.

Exemplarily, the first IAB node may determine the first cell that needs to coordinate resource configuration based on the monitoring or measurement results of its own MT part or the terminal device it serves on the neighboring cells. The neighboring cell of the first IAB node may be a cell under the jurisdiction of other IAB nodes around the first IAB node, or may be a cell under the jurisdiction of the IAB donor node, which is not limited in this application. Moreover, the first IAB node may have one or more neighboring cells. In a specific implementation, the number of neighboring cells of the first IAB node may be determined by the deployment of the IAB nodes in the IAB network.

If the MT part of the first IAB node measures that the received power of the reference signal from a certain cell is greater than or equal to the second set threshold, or the terminal equipment served by the first IAB node measures the received power of the reference signal from a certain cell If it is greater than or equal to the second set threshold and reported to the first IAB node (specifically, it may be the DU part reported to the first IAB node), then the first IAB node can determine that its MT part or the terminal equipment served by the cell If the interference exceeds a certain level, it is necessary to coordinate the resource configuration with the cell. At this time, the cell can be considered as the first cell. It should be understood that, in the embodiment of the present application, the MT part of the IAB node or the terminal device served by the IAB node can report a measurement report to the IAB node (specifically, the DU part of the IAB node). The MT part or the terminal device may be based on the network side. Some configured measurement events or conditions are reported. When these measurement events occur or the conditions are met, the report of the measurement report is triggered; or it can also be that the MT part or terminal device responds to the report after receiving the report request from the network device Request and report measurement reports.

Optionally, the MT part of the first IAB node may listen to or measure reference signals of surrounding cells, generate a corresponding measurement report, and then send the measurement report to the DU part of the first IAB node. The measurement report includes the identification of at least one neighboring cell of the first IAB node measured by the MT part of the first IAB node, and the measurement result corresponding to each neighboring cell in the at least one neighboring cell, and the measurement corresponding to the neighboring cell The result may be, for example, the received power (reference signal received power, RSRP) or received signal strength indicator (RSSI) of the reference signal of the neighboring cell. Further, the DU part of the first IAB node may determine the first cell that needs to coordinate resource configuration according to the measurement results corresponding to each neighboring cell in the received measurement report. For example, the neighboring cell whose RSRP of the reference signal is greater than or equal to the second set threshold may be determined as the first cell that needs to coordinate resource configuration.

Similarly, the terminal equipment or sub-IAB node served by the first IAB node can also listen to or measure the reference signals of surrounding cells, generate a corresponding measurement report, and then send the measurement report to the first IAB node. It should be noted that this The first IAB node mentioned here may also specifically refer to the DU part of the first IAB node. The measurement report includes the identification of at least one neighboring cell of the first IAB node measured by the terminal device, and the measurement result corresponding to each neighboring cell in the at least one neighboring cell. The measurement result corresponding to the neighboring cell may be, for example, RSRP or RSSI of the reference signal of the neighboring cell. Further, the first IAB node (or the DU part of the first IAB node) may determine the first cell that needs to coordinate resource configuration according to the measurement results corresponding to each neighboring cell in the received measurement report. For example, the neighboring cell whose RSRP of the reference signal is greater than or equal to the second set threshold may be determined as the first cell that needs to coordinate resource configuration. It should be understood that the measurement report sent by the terminal device to the first IAB node may be transmitted through a report/message of the MAC layer or the RLC layer, for example, it may be a MAC control element (CE), which is not limited in this application, and the sub-IAB node The measurement report sent to the first IAB node may be transmitted through the report/message of the BAP layer, MAC layer, or RLC layer, which is also not limited in this application.

It should be noted that the resource configuration described in the embodiments of the present application may include transmission power configuration, uplink and downlink transmission subframe or time slot configuration, synchronization signal and physical broadcast channel block (synchronization signal and physical broadcast channel block, SSB) One or more of the configurations (such as the sending location of the SSB).

The terminal device served by the first IAB node may also be understood as a terminal device that accesses the first IAB node or a terminal device that resides in a cell under the jurisdiction of the first IAB node, which will not be described in detail below.

Step S402: The first IAB node determines the serving node to which the first cell belongs.

In the embodiment of this application, the serving node to which the first cell belongs can be regarded as the target that the first IAB node needs to perform resource coordination. The serving node can be the second IAB node (that is, another IAB node) or the IAB host. node.

The first IAB node may have multiple possible implementations for determining the serving node to which the first cell belongs:

In the first possible implementation manner, as shown in FIG. 5, in step S501, the first IAB node may receive the first configuration information and/or the second configuration information from the IAB host node, which may specifically be from the IAB donor CU Or the IAB donor CU CP receives the first configuration information and/or the second configuration information. Then in step S502, the first IAB node may determine the serving node to which the first cell belongs according to the received first configuration information and/or second configuration information. Wherein, the first configuration information includes the identity of each child node of the first IAB node and the identity of one or more cells served by each child node, and the second configuration information includes the identity of the parent node of the first IAB node And the identity of one or more cells served by the parent node. It can be understood that in some network topologies, an IAB node may have more than one parent node. Therefore, the second configuration information may include the identifier of each parent node of the first IAB node, and each parent node The identity of one or more cells being served.

In the embodiment of the present application, the identifier of the child node may include one or more of the following: the BAP layer address of the child node (address), the cell-radio network temporary identifier (cell-radio network) assigned by the first IAB node to the child node network temporary identifier, C-RNTI), the index of the C-RNTI allocated by the first IAB node to the child node, the C-RNTI allocated by the first IAB node to the child node, and the cell where the child node accesses the first IAB node The combination of the cell identifier (ie, C-RNTI+cell identifier), the layer 2 identifier (destination L2 ID) of the child node (specifically, the MT part of the child node) in the side link. Exemplarily, the layer two identifier may be carried in the MAC header, RLC header, or BAP layer of the side link data.

The identifier of the parent node may include one or more of the following: the BAP layer address of the parent node, the identifier of the DU part of the parent node (such as the IP address of the DU part, or the gNB DU ID of the DU part or the name of the DU ( name), etc.), the combination of the C-RNTI assigned by the grandfather node of the first IAB node to the parent node and the identity of the cell that the parent node accesses in the grandparent node, and the grandparent node of the first IAB node assigned to the parent node Used to identify the gNB-DU F1AP UE ID of the parent node on the control plane of the F1 interface, the IAB host node (specifically, IAB donor CU or IAB donor CU CP) assigned to the parent node for the control plane of the F1 interface Identify the gNB-CU F1AP UE ID of the parent node, and the layer 2 identifier used by the parent node (which may be the MT part of the parent node) in the side link. It can be understood that the grandparent node of the first IAB node refers to the parent node of the parent node of the first IAB node. When the first IAB node has more than one parent node, the grandparent node of the first IAB node may also be more than one, but for a certain parent node of the first IAB node, the identity of the parent node is represented The grandparent node of the first IAB node involved in the manner specifically refers to the parent node of the parent node, rather than other grandparent nodes of the first IAB node.

The identity of the cell may include one or more of the following: a physical cell identity (PCI), a global cell identity (E-UTRAN cell global identifier, ECGI) in a 4G network, and a cell identity in a 4G network (E-UTRAN cell identifier, ECI), the global cell identifier (NR cell global identifier, NCGI) in the NR network, and the cell identifier (NR cell identifier, NCI) in the NR network.

It can be seen that this implementation is applicable to scenarios where the serving node to which the first cell belongs has a connection relationship with the first IAB node. Generally speaking, adjacent nodes that have a connection relationship are more likely to affect each other, and the connection relationship between adjacent nodes is embodied in the network topology of the IAB network as a parent-child relationship between nodes. Therefore, the first IAB node needs to know the information of the cells served by its own child nodes and parent nodes.

By receiving the first configuration information from the IAB host node, the first IAB node can learn the correspondence between each of its child nodes and one or more cells served by the child node, and by receiving the second configuration information from the IAB host node, The first IAB node can learn the correspondence between its parent node and one or more cells served by the parent node. In this way, after the first IAB node determines the first cell that needs to coordinate resource configuration, if there is a connection relationship between the serving node to which the first cell belongs and the first IAB node, that is, the serving node to which the first cell belongs is the first IAB node The first IAB node can determine the serving node to which the first cell belongs based on the above-mentioned first configuration information and/or second configuration information. Conversely, if the first IAB node cannot determine the serving node to which the first cell belongs based on the first configuration information and/or the second configuration information, it means that the serving node to which the first cell belongs is not a child or parent of the first IAB node. Node, the first IAB node can determine the serving node to which the first cell belongs through other methods.

It should be noted that in this implementation manner, the IAB host node can actively send the above-mentioned first configuration information and/or second configuration information to the first IAB node. For example, the IAB host node can periodically send the message to the first IAB node The first IAB node sends the first configuration information and/or the second configuration information, or sends the first configuration information and/or the second configuration information to the first IAB node after the first IAB node is connected to the network. When the network topology of the network changes, the first configuration information and/or the second configuration information are sent to the first IAB node.

Alternatively, the IAB host node may also send the above-mentioned first configuration information and/or second configuration information to the first IAB node after receiving the request of the first IAB node. That is, the first IAB node may send the first request message to the IAB host node. Optionally, the first request message may include an identifier of the first IAB node, and the first request message is used to request the above-mentioned first configuration information and/or second configuration information from the IAB host node. In this way, after receiving the first request message, the IAB host node may respond to the first request message and send the first configuration information and/or the second configuration information to the first IAB node.

The first configuration information and/or the second configuration information may be carried in the control plane signaling sent by the IAB host node to the first IAB node, and the control plane signaling may be sent by the IAB host node to the first IAB node. The RRC message of the MT part may also be the F1AP message of the DU part sent by the IAB host node to the first IAB node, which is not limited in this application.

Further, considering that the first IAB node may have one or more sub-nodes, the cell information corresponding to different sub-nodes can also be carried in the same control plane signaling and sent, or carried in multiple control plane signaling. Send separately (for example, the cell information served by each child node may be included in multiple F1AP messages related to the child nodes and sent to the first node), which is not limited in this application. Similarly, the first IAB node can also have more than one parent node, and the cell information corresponding to different parent nodes can also be carried in the same control plane signaling and sent in multiple control plane signaling. Send separately, this application is also not limited.

It should be noted that since the first IAB node can specifically interact with the IAB donor CU or IAB donor CU CP in the IAB host node, the first configuration information and/or the second configuration information, therefore, in the first possible implementation manner The IAB host node involved in the specific description related to the interaction of the first configuration information and/or the second configuration information between the first IAB node and the IAB host node can be replaced with IAB donor CU or IAB donor CU CP.

In the second possible implementation manner, as shown in FIG. 6, in step S601, the first IAB node may receive the third configuration information from the IAB host node, which may specifically be received from IAB donor CU or IAB donor CU CP. Three configuration information. Then, in step S602, the first IAB node may determine the serving node to which the first cell belongs according to the received third configuration information. Wherein, the third configuration information may include an identifier of a serving node to which at least one neighboring cell of the first IAB node belongs. Alternatively, the third configuration information may include the identifier of at least one neighboring cell of the first IAB node, and the identifier of the serving node to which each neighboring cell of the at least one neighboring cell belongs.

The identifier of the serving node may include the BAP layer address of the serving node, and/or the layer 2 identifier of the serving node (which may specifically be the MT part of the serving node) in the side link. As mentioned above, the neighboring cell of the first IAB node may be a cell managed by another IAB node, or may be a cell managed by an IAB donor node (specifically, an IAB donor DU). Therefore, for a neighboring cell of the first IAB node, if the serving node to which the neighboring cell belongs is an IAB node, then the identity of the serving node may include the BAP layer address of the IAB node, and/or the IAB node is on the side Layer 2 identification in the link. If the serving node to which the neighboring cell belongs is an IAB donor node (specifically, IAB donor DU), since the IAB donor node has no MT part and there is no layer 2 identifier in the side link, then the identifier of the serving node may include The BAP layer address of the IAB host node (specifically, IAB donor DU).

In this embodiment of the application, as shown in step S600, the IAB host node (specifically, IAB donor CU, or IAB donor CU CP) may respond to the second request message sent by the first IAB node, or the MT of the first IAB node Part of the measurement report, or the measurement report of the terminal device served by the first IAB node, and the third configuration information is sent to the first IAB node.

Specifically, in one design, the first IAB node may send a second request message to the IAB host node. The second request message is used to request third configuration information from the IAB host node. The second request message includes the The identifier of at least one neighboring cell, the identifier of the at least one neighboring cell may be the first IAB node scanned through the cell search, or the first IAB node (specifically, the MT part of the first IAB node) passing through the neighboring cell The measurement results are not limited in this application. In this way, after receiving the second request message, the IAB host node may respond to the second request message, and send third configuration information to the first IAB node. The third configuration information includes information related to the at least one neighboring cell. Each neighboring cell corresponds to the identity of the serving node. Optionally, the second request message may also include the identity of the first IAB node.

In another design, the first IAB node may send a second request message to the IAB host node, and the second request message is used to request the third configuration information from the IAB host node. The second request message includes the measurement report of the MT part of the first IAB node, and the measurement report includes the identifier of the at least one neighboring cell and the measurement result corresponding to each neighboring cell of the at least one neighboring cell. The measurement result corresponding to the neighboring cell may be, for example, the RSRP or RSSI of the reference signal of the neighboring cell measured by the MT part of the first IAB node. In this way, after receiving the second request message, the IAB host node can respond to the second request message and send third configuration information to the first IAB node, where the third configuration information includes information related to each of the at least one neighboring cell The identifier of the serving node corresponding to each neighboring cell. Optionally, the second request message may also include the identity of the first IAB node.

Optionally, the at least one neighboring cell may be all neighboring cells included in the measurement report, that is, the IAB donor node may determine the status of all the first IAB nodes in the measurement report of the MT part of the first IAB node. The neighboring cells all feed back the information of the corresponding serving node. Optionally, the measurement result corresponding to each neighboring cell included in the measurement report is greater than the first set threshold, that is, the measurement report may only include the neighboring cells measured by the MT of the first IAB node. The identification and measurement result of at least one neighboring cell whose corresponding measurement result is greater than the first set threshold in the cell.

Optionally, the measurement report of the MT part of the first IAB node may also include the identification of other neighboring cells except the at least one neighboring cell, that is, the at least one neighboring cell may be the first IAB node's For some of the neighboring cells included in the measurement report of the MT part, the IAB donor node may feed back the information of the corresponding serving node for the part of the neighboring cells in the received measurement report of the MT part of the first IAB node. Further, the at least one neighboring cell may be one or more neighboring cells whose corresponding measurement results of all neighboring cells of the first IAB node included in the measurement report are greater than a first set threshold.

In another design, the first IAB node may send a second request message to the IAB host node, where the second request message is used to request the third configuration information from the IAB host node. Correspondingly, the first IAB node may also send a measurement report of its own MT part to the IAB donor node. The measurement report includes the identification of the at least one neighboring cell and the corresponding information of each neighboring cell in the at least one neighboring cell. Measurement results. That is to say, in this design, the second request message and the measurement report of the MT part of the first IAB node are sent separately. In this scenario, it can be considered that the measurement report of the MT part of the first IAB node is used to determine The at least one neighboring cell that needs to feed back the information of the serving node, for example, the at least one neighboring cell may be a neighboring cell whose corresponding measurement result included in the measurement report is greater than a first set threshold, and the second request message may be considered It is used to trigger the sending of the third configuration information. Optionally, in specific implementation, the measurement report of the MT part of the first IAB node may be sent periodically according to a certain rule, that is, the sending of the measurement report of the MT part of the first IAB node and the sending of the second request message may be Not at the same time or out of sync. For the specific implementation manner of the measurement report of the MT part of the first IAB node, reference may be made to the above description, which will not be repeated here.

In this way, after receiving the second request message, the IAB host node may respond to the second request message to send third configuration information to the first IAB node, and the third configuration information includes each of the at least one neighboring cell. An identifier of a serving node to which a neighboring cell belongs, and the at least one neighboring cell is determined according to a measurement report of the MT part of the first IAB node.

In yet another design, the terminal device served by the first IAB node may send a measurement report to the IAB donor node, the measurement report including the identification of the at least one neighboring cell, and each neighboring cell in the at least one neighboring cell The corresponding measurement result may be, for example, the received power of the reference signal of the neighboring cell measured by the terminal device. In this way, after receiving the measurement report, the IAB donor node may send third configuration information to the first IAB node, where the third configuration information includes the identification of the serving node to which each neighboring cell of the at least one neighboring cell belongs.

Optionally, the at least one neighboring cell may be all neighboring cells included in the measurement report, that is, the IAB donor node may feed back all neighboring cells of the first IAB node in the measurement report reported by the terminal device The information of the corresponding service node. Further, the measurement result corresponding to each neighboring cell included in the measurement report is greater than the first set threshold, that is, the measurement report may only include the neighboring cell measured by the terminal equipment served by the first IAB node. The identification and measurement result of at least one neighboring cell whose corresponding measurement result is greater than the first set threshold in the cell.

Optionally, the measurement report reported by the terminal device may also include the identification of other neighboring cells except the at least one neighboring cell, that is, the at least one neighboring cell may be in the measurement report of the MT part of the first IAB node. For some neighboring cells included, the IAB donor node can feed back the information of the corresponding serving node for some neighboring cells in the received measurement report of the MT part of the first IAB node. Further, the at least one neighboring cell may be one or more neighboring cells whose corresponding measurement results of all neighboring cells of the first IAB node included in the measurement report are greater than a first set threshold.

It can be seen that the second implementation manner is applicable to scenarios where the serving node to which the first cell belongs does not have a connection relationship with the first IAB node. There is no connection relationship between the serving node to which the first cell belongs and the first IAB node, which means that the serving node to which the first cell belongs is not a child or parent node of the first IAB node. Correspondingly, the first node sent by the IAB host node The configuration information and/or the second configuration information also do not include the information of the cell managed by the serving node. However, even if the serving node of the first cell does not have a connection relationship with the first IAB node, if the serving node of the first cell and the first IAB node are geographically close, they may still influence each other, causing interference.

Therefore, the first IAB node may send the identity of at least one neighboring cell to the IAB donor node, and request the IAB donor node to provide the identity of the serving node to which each neighboring cell in the at least one neighboring cell belongs, so as to determine the resource coordination required Service node.

It should be noted that since the first IAB node can specifically interact with the IAB donor CU or IAB donor CU CP in the IAB host node, the second request message and the third configuration information, therefore, each of the second possible implementation manners In this design, the IAB host node involved in the specific description related to the interaction of the second request message and the third configuration information can be replaced with IAB donor CU or IAB donor CU CP.

It should be understood that this implementation manner is also applicable to a scenario where the serving node of the first cell has a connection relationship with the first IAB node. In this scenario, the at least one neighboring cell may include a cell managed by a child node or a parent node of the first IAB node.

In a third possible implementation manner, the first IAB node may receive the third configuration information, and the first configuration information and/or the second configuration information from the IAB host node, and then according to the received third configuration information, and the first configuration information The first configuration information and/or the second configuration information determine the serving node to which the first cell belongs.

This implementation manner can be considered as a combination of the foregoing first possible implementation manner and the second possible implementation manner. For the specific implementation process, reference may be made to the above description, which will not be repeated here. By combining the first possible implementation with the second possible implementation, it is possible to effectively avoid the first possibility when the serving node to which the first cell belongs is not a child or parent of the first IAB node. The implementation mode of the first cell cannot determine the problem of the serving node to which the first cell belongs, thereby effectively improving the efficiency of determining the resource coordination object.

Similarly, the first IAB node may specifically receive the third configuration information, the first configuration information and/or the second configuration information, the third configuration information and the first configuration information and/or the IAB donor CU or the IAB donor CU CP. Or the second configuration information may include a variety of possible situations such as the third configuration information and the first configuration information, the third configuration information and the second configuration information, the third configuration information, the first configuration information and the second configuration information.

In a fourth possible implementation manner, as shown in FIG. 7, in step S701, the first IAB node may receive the system broadcast message of the first cell, and the system broadcast message includes the identity of the serving node to which the first cell belongs. . Furthermore, in step S702, the first IAB node may determine the serving node to which the first IAB node belongs according to the system broadcast message.

Similarly, the identifier of the serving node may include the BAP layer address of the serving node, and/or the layer 2 identifier of the serving node (which may specifically be the MT part of the serving node) in the side link. Specifically, if the serving node is an IAB node, then the identity of the serving node may include the BAP layer address of the IAB node, and/or the IAB node (which may specifically be the MT part of the IAB node) is in the side link The layer 2 logo. If the serving node is an IAB host node (specifically, IAB donor DU), since the IAB host node has no MT part and there is no layer 2 identifier in the side link, then the identifier of the service node may include the IAB host node (specifically It can also be the BAP layer address of the IAB donor DU).

In the embodiments of the present application, each node in the IAB network (including the IAB host node (specifically, IAB donor DU) and the second IAB node) can carry its own identity in the system broadcast message of the cell under its jurisdiction. In this way, each node can learn the information of the serving node of the cell that needs resource coordination by listening to the system broadcast message.

Step S403: The first IAB node sends a first message to the serving node through the wireless backhaul link or the side link between the first IAB node and the serving node of the first cell, and the first message is used to The serving node requests to adjust the resource configuration of the first cell.

After receiving the first message, the serving node of the first cell can adjust the resource configuration of the first cell according to the request. For example, the power can be reduced, or the uplink and downlink subframe/slot ratio of the first cell can be adjusted, or the first cell can be modified. Cell uplink and downlink sub-frame/time slot settings, etc.

As mentioned above, the serving node of the first cell may be another IAB node, such as the second IAB node, or it may be an IAB donor node (specifically, it may be an IAB donor DU).

Correspondingly, in step S403, if the serving node of the first cell is the second IAB node, then the first IAB node can send the first message to the second IAB node through the one-hop or multi-hop wireless backhaul link, and The first message may be sent to the second IAB node through a one-hop or multi-hop side link between the first IAB node and the serving node. The side link refers to the wireless direct communication link between the MT part of the IAB node, which may be as shown in FIG. 8. Optionally, when the first message is sent to the second IAB node through the side link, the first message may be specifically sent to the MT part of the second IAB node.

If the serving node of the first cell is an IAB donor node (specifically, IAB donor DU), then the first IAB node can pass a one-hop or multi-hop wireless backhaul link to the IAB donor node (specifically IAB donor DU) Send the first message. Since the IAB host node has no MT part and cannot establish a side link with the MT part of the IAB node, the first IAB node cannot send the first message to the IAB host node through the side link between the IAB nodes.

The process in which the first IAB node sends the first message to the serving node of the first cell through the wireless backhaul link will be described in detail below. In this scenario, the serving node of the first cell may be the second IAB node or the IAB host node.

If there is a direct connection between the serving node of the first cell and the first IAB node, that is, the serving node of the first cell is a child or parent node of the first IAB node, then the first IAB node can directly communicate with the first cell The wireless backhaul link between the serving nodes of the first cell sends the first message to the serving node of the first cell. The first message may be sent through a BAP layer control protocol data unit (protocol data unit, PDU), or through a MAC control unit (control element, CE), which is not limited in this application.

If there is no direct connection between the serving node of the first cell and the first IAB node, that is, the serving node of the first cell is not a child node or parent node of the first IAB node, then the first IAB node needs to pass through at least one intermediate node Send the first message to the serving node of the first cell. At this time, the first message can be sent through the control PDU of the BAP layer, and the header information of the control PDU of the BAP layer needs to include the routing identification information of the serving node of the first cell, and the routing identification information can include the identification of the target node , That is, the identity of the serving node of the first cell, and may also include the identity of the transmission path from the first IAB node to the serving node of the first cell. The routing identification information of the serving node of the first cell and the foregoing transmission path identification may be sent to the first IAB node by the IAB host node (specifically, IAB donor CU or IAB donor CU CP) through dedicated control plane signaling, Or it can be carried in the third configuration information mentioned above and sent to the first IAB node, which is not limited in this application.

Wherein, the identifier of the serving node of the first cell may be, for example, the BAP layer address of the serving node of the first cell. The transmission path identifier may be the identifier of an available transmission path between the first IAB node and the serving node of the first cell. In addition to the first IAB node and the serving node of the first cell, the transmission path also includes Contains at least one intermediate node. Optionally, there may be one or more available transmission paths between the first IAB node and the serving node of the first cell, and each transmission path has a corresponding transmission path identifier, and the transmission path identifier in the routing identifier information may be It is the identifier of one of the available transmission paths between the first IAB node and the serving node of the first cell.

In this way, the first IAB node can query the routing table configured in the first IAB node according to the routing identification information of the serving node of the first cell, determine the next hop node, and then forward the BAP layer control PDU to the next hop. Jump node.

Similarly, each intermediate node in the transmission path can also query the route configured in the intermediate node according to the identification of the target node in the received BAP layer control PDU, that is, the routing identification information of the serving node of the first cell Table, determine the next hop node, and then forward the BAP layer control PDU to the next hop node, until the BAP layer control PDU is forwarded to the serving node of the first cell.

In the embodiment of the present application, the IAB host node (specifically, IAB donor CU or IAB donor CU CP) may configure a corresponding routing table for the first IAB node and the at least one intermediate node. The routing table may be sent to each node (including the first IAB node and the at least one intermediate node) through separate control plane signaling (for example, an RRC message or an F1AP message). Optionally, the routing table of the first IAB node may also be carried in the third configuration information mentioned above and sent to the first IAB node. The at least one intermediate node may include an IAB node, and may also include an IAB host node (specifically, it may be an IAB donor DU), which is not limited in this application.

Taking the routing table configured in the first IAB node as an example, as shown in FIG. 9, the routing table includes the routing identification information of several destination nodes and the identification of the next hop node corresponding to each routing identification information. Each route identification information may include the identification of the destination node, and may also include the identification of a transmission path to the destination node, the identification of the destination node may be the BAP layer address of the destination node, and the next hop node The identifier of can be the BAP layer address of the next hop node. In this way, the first IAB node can look up the routing identification information of the serving node of the first cell from the routing identification information of several destination nodes included in the routing table according to the routing table, and determine the routing identification information of the serving node of the first cell The next hop node that matches the routing identification information.

It should be noted that if the routing identification information of the serving node of the first cell includes the identification of the serving node of the first cell and a transmission path identification to the serving node of the first cell, but the first IAB node is in the routing table According to the routing identification information, the next hop node cannot be found (for example, no entry that exactly matches the routing identification information is found; a complete match means that the destination node identification in the entry = the routing identification information of the serving node of the first cell The identity of the serving node of the first cell in the first cell, the transmission path identity of the entry = a transmission path identity to the serving node of the first cell in the routing identity information of the serving node of the first cell), or the following found One-hop node is unavailable (for example, an abnormality such as a wireless link failure occurs in the wireless link between the next-hop node searched according to the routing identification information), the first IAB node can include other routing table entries in the routing table , Select other available next hop nodes in the table entry with the same identifier as the serving node of the first cell. For example, the first IAB node may select the next hop node corresponding to the entry that does not completely match the routing identification information for forwarding; the incomplete match means that the destination node identifier in the entry = the serving node of the first cell The identifier of the serving node of the first cell in the routing identifier information, or the transmission path identifier of the entry=a transmission path identifier to the serving node of the first cell in the routing identifier information of the serving node of the first cell.

The content and usage mode of the routing table configured in each intermediate node are similar to the routing table in the first IAB node, and will not be repeated here.

Optionally, the IAB host node (specifically, IAB donor CU or IAB donor CU CP) may configure corresponding routing tables for all IAB nodes under the IAB host node.

In the embodiment of this application, if the first message is sent through the BAP layer control PDU, then the BH RLC channel used to transmit this type of BAP layer control PDU on the wireless backhaul link can be established in advance according to the configuration of the IAB host node , The corresponding mapping rules can also be configured by the IAB host node. The IAB host node may specifically be IAB donor CU or IAB donor CU CP, and the mapping rule may be to specify a specific BH RLC channel ID corresponding to the BH RLC channel used to transmit this type of BAP layer control PDU for the purpose of resource coordination. . The IAB host node (such as IAB donor CU or IAB donor CU CP) can send the mapping rule to the IAB node through an F1AP message or an RRC message. Optionally, the IAB host node (such as IAB donor CU or IAB donor CU CP) can also send the mapping rule to the DU part of the IAB host node through an F1AP message.

It can be seen from this that, in this embodiment of the application, when the first IAB node needs to coordinate resources with neighboring IAB nodes, the first IAB node can determine the target of resource coordination, and directly or via other intermediate nodes, through the wireless backhaul chain The route sends the first message for requesting adjustment of the resource configuration to the resource coordination target, so as to realize rapid resource coordination in the IAB network.

The process in which the first IAB node sends the first message to the serving node of the first cell through the side link will be described in detail below. In this scenario, the serving node of the first cell is the second IAB node.

If there is a direct connection between the serving node of the first cell and the first IAB node, that is, the serving node of the first cell is a child node or a parent node of the first IAB node, then the first IAB node can directly communicate with the first cell On the side link between the serving nodes of, sending the first message to the serving node of the first cell. The first message may be sent through the control PDU of the BAP layer, may also be sent through the MAC CE, or may be sent through the RRC message in the side link, which is not limited in this application. It should be noted that here, when the first message is sent through the control PDU of the BAP layer, the BAP layer needs to be introduced in the side link. The BAP protocol layer and the BAP layer in the wireless backhaul link have similar functions, mainly It is used to perform functions such as data packet routing on the side link and bearer mapping. The BAP layer can be located above the RLC layer and below the PDCP layer.

If there is no direct connection between the serving node of the first cell and the first IAB node, that is, the serving node of the first cell is not a child node or parent node of the first IAB node, then the first IAB node needs to pass through at least one intermediate node Send the first message to the serving node of the first cell. At this time, the first message can be sent through the control PDU of the BAP layer, can also be sent through the MAC CE, or can be sent through the RRC message in the side link, which is not limited in this application. Similarly, here, when the first message is sent through the control PDU of the BAP layer, the BAP layer needs to be introduced into the side link. The function and specific location of the BAP layer of this side link can be found in the previous paragraph. describe.

When the first message is sent through the control PDU of the BAP layer, the header information of the control PDU of the BAP layer needs to include the routing identification information of the serving node of the first cell, and the routing identification information may include the routing identification information of the serving node of the first cell. The identification may also include the identification of the transmission path from the first IAB node to the serving node of the first cell. The routing identification information of the serving node of the first cell can be sent by the IAB host node to the first IAB node through dedicated control plane information, for example, it can be carried in the third configuration information mentioned above and sent to the first IAB node. The application is not limited.

Wherein, the identifier of the serving node of the first cell may be, for example, the BAP layer address of the serving node of the first cell, and the transmission path identifier may be an available link between the first IAB node and the serving node of the first cell. The identification of the transmission path. Optionally, there may be one or more available transmission paths between the first IAB node and the serving node of the first cell, and each transmission path has a corresponding transmission path identifier, and the transmission path identifier in the routing identifier information may be It is the identifier of one of the available transmission paths between the first IAB node and the serving node of the first cell.

Similarly, each intermediate node in the transmission path can also query the routing table configured in the intermediate node to determine the next hop based on the routing identification information of the serving node of the first cell in the received BAP layer control PDU The node then forwards the control PDU of the BAP layer to the next hop node until the control PDU of the BAP layer is forwarded to the serving node of the first cell.

In the embodiment of the present application, the IAB host node (specifically, IAB donor CU or IAB donor CU CP) may configure a corresponding routing table for the first IAB node and the at least one intermediate node. The routing table can be sent to each IAB node through separate configuration signaling. Optionally, the routing table of the first IAB node can also be carried in the third configuration information mentioned above and sent to the first IAB node.

Taking the routing table configured in the first IAB node as an example, the routing table includes the routing identification information of several destination nodes and the identification of the next hop node corresponding to each routing identification information. The route identification information may include the identification of the destination node, and may also include a transmission path identification to the destination node. The identification of the destination node may be the BAP layer address of the destination node or the MT part of the destination node. The layer 2 identification in the side link may also include the BAP layer address of the destination node and the layer 2 identification of the MT part of the destination node in the side link. The identifier of the next hop node may be the BAP layer address of the next hop node, or may be the layer 2 identifier of the MT part of the next hop node in the side link, and may include the BAP of the next hop node The layer address and the MT part of the next hop node are identified in layer 2 in the side link. In this way, the first IAB node can look up the routing identification information of the serving node of the first cell from the routing identification information of several destination nodes included in the routing table according to the routing table, and determine the routing identification information of the serving node of the first cell The next hop node that matches the routing identification information.

It should be noted that if the routing identification information of the serving node of the first cell includes the identification of the serving node of the first cell and a transmission path identification to the serving node of the first cell, but the first IAB node is in the routing table According to the routing identification information, no available next hop node can be found (for example, no table entry that exactly matches the routing identification information is found; a complete match means that the destination node ID in the table entry = the route of the serving node of the first cell The identity of the serving node of the first cell in the identification information, the transmission path identity of the entry = a transmission path identity to the serving node of the first cell in the routing identity information of the serving node of the first cell), or find If the next hop node is unavailable (for example, the wireless link between the next hop node found according to the routing identification information has a wireless link failure and other abnormalities), the first IAB node can include other routing tables in the routing table Among the items, select other available next hop nodes in the table item with the same identifier as the serving node of the first cell. For example, the first IAB node may select the next hop node corresponding to the entry that does not completely match the routing identification information for forwarding; the incomplete match means that the destination node identifier in the entry = the serving node of the first cell The identifier of the serving node of the first cell in the routing identifier information, or the transmission path identifier of the entry=a transmission path identifier to the serving node of the first cell in the routing identifier information of the serving node of the first cell.

Optionally, the IAB host node (specifically, IAB donor CU or IAB donor CU CP) may also configure corresponding routing tables for all IAB nodes under the IAB host node.

In the embodiment of this application, if the first message is sent through the control PDU of the BAP layer, the logical channel used to transmit such BAP layer control PDU on the side link can be established in advance according to the configuration of the IAB host node, correspondingly The mapping rules for can also be configured by the IAB host node, and the IAB host node may specifically be IAB donor CU or IAB donor CU CP. The mapping rule may be to designate a logical channel corresponding to a specific logical channel identifier (logical channel identifier, LCID) for transmitting such BAP layer control PDUs for the purpose of resource coordination. The IAB host node (for example, IAB donor CU or IAB donor CU CP) can send the mapping rule to the IAB node through an F1AP message or an RRC message. For the IAB node as an intermediate node, the IAB host node (such as IAB donor CU or IAB donor CU CP) will also send control plane signaling to configure the logical channel of the ingress link and the egress link (egress link). ), where, for the intermediate IAB node, the ingress link refers to the wireless link for receiving data packets, the egress link refers to the wireless link for sending data packets, and the control plane information The command can be an F1AP message or an RRC message.

It can be seen from this that, in the embodiment of the present application, when the first IAB node needs to coordinate resources with neighboring IAB nodes, the first IAB node can determine the target of resource coordination, directly or through other intermediate nodes, through the communication between IAB nodes. The side link sends the first message for requesting adjustment of the resource configuration to the target of resource coordination, so that rapid resource coordination between IAB nodes can be realized.

An embodiment of the present application also provides a communication device. Please refer to FIG. 10, which is a schematic structural diagram of a communication device provided in an embodiment of this application. The communication device 1000 includes a transceiver module 1010 and a processing module 1020. The communication device can be used to implement the functions related to the IAB node or the IAB host node in any of the foregoing method embodiments. For example, the communication device may be an IAB node or an IAB host node; the communication device may also be a chip included in an IAB node or an IAB host node.

Exemplarily, when the communication device serves as the first IAB node and executes the method embodiment shown in FIG. 4, the processing module 1020 is used to determine the first cell that needs to coordinate resource configuration and the service to which the first cell belongs Node; the transceiver module 1010 is used to send a first message to the serving node through the wireless backhaul link or the side link between the first IAB node and the serving node, and the first message is used to request adjustment from the serving node Resource configuration of the first cell.

In a possible design, the serving node may be the second IAB node or the IAB host node; when the serving node is the second IAB node, the transceiver module 1010 is specifically configured to use a wireless backhaul link or a side link Send the first message to the second IAB node, and the side link is the wireless direct communication link between the MT part of the first IAB node and the MT part of the second IAB node; when the serving node is the IAB host When it is a node, the transceiver module 1010 is specifically configured to send the first message to the IAB host node through the wireless backhaul link.

In a possible design, the transceiver module 1010 is further configured to receive first configuration information and/or second configuration information from the IAB host node, where the first configuration information includes the identification of each child node of the first IAB node, And the identity of one or more cells served by each child node, the second configuration information includes the identity of the parent node of the first IAB node, and the identity of one or more cells served by the parent node. Correspondingly, the processing module 1020 is further configured to determine the serving node to which the first cell belongs according to the first configuration information and/or the second configuration information.

In a possible design, the transceiver module 1010 is further configured to send the first request message to the IAB host node. The first request message may include the identifier of the first IAB node. The first request message is used to request first configuration information and/or second configuration information.

In a possible design, the transceiver module 1010 is further configured to receive third configuration information from the IAB host node, where the third configuration information includes the identity of the serving node to which at least one neighboring cell of the first IAB node belongs, and The identifier of the serving node includes the BAP layer address of the serving node, and/or the layer 2 identifier of the serving node in the side link.

In a possible design, the transceiver module 1010 is further configured to send a second request message to the IAB host node, where the second request message is used to request third configuration information.

In a possible design, the processing module 1020 is specifically configured to determine the service node according to the third configuration information.

In a possible design, the transceiver module 1010 is further configured to receive a system broadcast message of the first cell. The system broadcast message includes the identity of the serving node to which the first cell belongs, and the identity of the serving node includes the serving node. The BAP layer address of the backhaul adaptation protocol and/or the layer 2 identifier of the service node in the side link.

In a possible design, the transceiver module 1010 is further configured to receive a reference signal from the first cell, and the received power of the reference signal is greater than or equal to the second set threshold.

Exemplarily, when the communication device serves as an IAB host node and executes the method embodiment shown in FIG. 4, the processing module 1020 is configured to generate first configuration information and/or second configuration information, where the first configuration information includes The identity of each child node of the first IAB node and the identity of one or more cells served by each child node, and the second configuration information includes the identity of the parent node of the first IAB node and one or more services served by the parent node. Identities of multiple cells; the transceiver module 1010 is configured to send the first configuration information and/or the second configuration information to the first IAB node.

In a possible design, the transceiver module 1010 is further configured to receive a first request message from the first IAB node, where the first request message is used to request the first configuration information and/or the second configuration information.

In a possible design, the transceiver module 1010 is further configured to send third configuration information to the first IAB node, where the third configuration information includes the identity of the serving node to which at least one neighboring cell of the first IAB node belongs, and The identifier of the serving node includes the BAP layer address of the serving node, and/or the layer 2 identifier of the serving node in the side link, which is a wireless direct communication link between the MT parts of the IAB node.

In a possible design, the transceiver module 1010 is further configured to receive a second request message from the first IAB node, where the second request message is used to request third configuration information.

Exemplarily, when the communication device is used as the second IAB node and executes the method embodiment shown in FIG. 4, the processing module 1010 is configured to generate a system broadcast message, and the system broadcast message includes the identifier of the second IAB node , The identifier of the second IAB node includes the backhaul adaptation protocol BAP layer address of the second IAB node, and/or the layer 2 identifier of the second IAB node in the side link, and the side link is The wireless direct communication link between the MT part of the mobile terminal of the IAB node; the transceiver module 1010 is used to send the system broadcast message in the first cell to be served.

The processing module 1020 involved in the communication device may be implemented by a processor or processor-related circuit components, and the transceiver module 1010 may be implemented by a transceiver or transceiver-related circuit components. The operation and/or function of each module in the communication device is to implement the corresponding process of the method shown in FIG. 4 to FIG.

Please refer to FIG. 11, which is a schematic diagram of another structure of a communication device provided in an embodiment of this application. The communication device may be specifically a kind of network equipment, such as a base station, for implementing functions related to an IAB node (such as a first IAB node or a second IAB node) or an IAB host node in any of the foregoing method embodiments.

The network device 1100 includes: one or more radio frequency units, such as a remote radio unit (RRU) 1101 and one or more baseband units (BBU) (also referred to as digital units, digital units, DU) 1102. The RRU 1101 may be called a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 11011 and a radio frequency unit 11012. The RRU 1101 part is mainly used for receiving and sending radio frequency signals and converting radio frequency signals and baseband signals. The 1102 part of the BBU is mainly used for baseband processing, control of the base station, and so on. The RRU 1101 and the BBU 1102 may be physically set together, or may be physically separated, that is, a distributed base station.

The BBU 1102 is the control center of the base station, and may also be referred to as a processing unit, which is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spreading. For example, the BBU (processing unit) 1102 may be used to control the base station to execute the operation flow of the network device in the foregoing method embodiment.

In an example, the BBU 1102 may be composed of one or more single boards, and multiple single boards may jointly support a radio access network with a single access indication (such as an LTE network), and may also support different access standards. Wireless access network (such as LTE network, 5G network or other networks). The BBU 1102 may also include a memory 11021 and a processor 11022, where the memory 11021 is used to store necessary instructions and data. The processor 11022 is used to control the base station to perform necessary actions, for example, to control the base station to perform the sending operation in the foregoing method embodiment. The memory 11021 and the processor 11022 may serve one or more boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.

An embodiment of the present application also provides a chip system, including: a processor, the processor is coupled with a memory, the memory is used to store a program or instruction, when the program or instruction is executed by the processor, the The chip system implements the method in any of the foregoing method embodiments.

Optionally, there may be one or more processors in the chip system. The processor can be implemented by hardware or software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like. When implemented by software, the processor may be a general-purpose processor, which is implemented by reading software codes stored in the memory.

Exemplarily, the chip system may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or a system on chip (SoC). It can also be a central processor unit (CPU), a network processor (NP), a digital signal processing circuit (digital signal processor, DSP), or a microcontroller (microcontroller). The controller unit, MCU), may also be a programmable controller (programmable logic device, PLD) or other integrated chips.

It should be understood that each step in the foregoing method embodiment may be completed by a logic circuit in a processor or an instruction in the form of software. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.

The embodiment of the present application also provides a computer-readable storage medium, which stores computer-readable instructions, and when the computer reads and executes the computer-readable instructions, the computer is caused to execute any of the above-mentioned method embodiments In the method.

The embodiments of the present application also provide a computer program product. When the computer reads and executes the computer program product, the computer is caused to execute the method in any of the foregoing method embodiments.

An embodiment of the present application also provides a communication system, which includes a first IAB node, and an IAB host node and/or a second IAB node. Optionally, the communication system further includes at least one terminal device served by the first IAB node.

It should be understood that the processor mentioned in the embodiments of the present application may be a CPU, or other general-purpose processors, DSP, ASIC, FPGA or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and so on. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), and 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 connection dynamic random access memory (synchlink DRAM, SLDRAM) ) And direct memory bus random access memory (direct rambus RAM, DR RAM).

It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, the memory (storage module) is integrated in the processor.

It should be noted that the memories described herein are intended to include, but are not limited to, these and any other suitable types of memories.

It should be understood that the various numerical numbers involved in the various embodiments of the present application are only for the convenience of description. The size of the sequence numbers of the above-mentioned processes does not imply the order of execution, and the order of execution of the processes should be based on their The functions and internal logic are determined, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

In the various embodiments of this application, if there are no special instructions and logical conflicts, the terms and/or descriptions between different embodiments are consistent and can be mutually cited. The technical features in different embodiments are based on their inherent Logical relationships can be combined to form new embodiments.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

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

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

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

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

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A resource coordination method, characterized in that the method includes:

The first access backhaul integrated IAB node determines the first cell that needs to coordinate resource configuration;

Determining, by the first IAB node, the serving node to which the first cell belongs;

The first IAB node sends a first message to the serving node through a wireless backhaul link, or a side link between the first IAB node and the serving node, and the first message is used for Requesting the serving node to adjust the resource configuration of the first cell.
The method according to claim 1, wherein the serving node is a second IAB node or an IAB host node; the method further comprises:

When the serving node is the second IAB node, the first IAB node sends the first message to the second IAB node through the wireless backhaul link or the side link, so The side link is a wireless direct communication link between the MT part of the mobile terminal of the first IAB node and the MT part of the second IAB node; or,

When the serving node is the IAB host node, the first IAB node sends the first message to the IAB host node through the wireless backhaul link.
The method according to claim 1 or 2, wherein the method further comprises:

The first IAB node receives first configuration information and/or second configuration information from the IAB host node, where the first configuration information includes the identification of each child node of the first IAB node, and the service of each child node Identities of one or more cells in, the second configuration information includes the identities of the parent node of the first IAB node, and the identities of one or more cells served by the parent node;

The determining, by the first IAB node, the serving node to which the first cell belongs includes:

The first IAB node determines the serving node according to the first configuration information and/or the second configuration information.
The method according to claim 3, wherein the identifier of the child node includes one or more of the following:

The BAP layer address of the child node, the cell radio network temporary identifier C-RNTI allocated to the child node by the first IAB node, the C-RNTI allocated to the child node by the first IAB node and the A combination of the cell identity of the cell where the child node accesses the first IAB node, and the layer 2 identity of the child node in the side link;

The identifier of the parent node includes one or more of the following:

The BAP layer address of the parent node, the identifier of the DU part of the distributed unit of the parent node, the C-RNTI allocated by the grandfather node of the first IAB node to the parent node, and the parent node in the grandfather The combination of the cell identity of the cell that the node accesses, and the layer 2 identity of the parent node in the side link.
The method according to claim 3, wherein the method further comprises:

The first IAB node sends a first request message to the IAB host node, where the first request message is used to request the first configuration information and/or the second configuration information.
The method according to claim 1 or 2, wherein the method further comprises:

The first IAB node receives third configuration information from the IAB host node, where the third configuration information includes the identity of the serving node to which at least one neighboring cell of the first IAB node belongs, and the The identifier includes the BAP layer address of the serving node, and/or the layer 2 identifier of the serving node in the side link;

The determining, by the first IAB node, the serving node to which the first cell belongs includes:

The first IAB node determines the serving node according to the third configuration information.
The method according to claim 6, wherein the method further comprises:

The first IAB node sends a second request message to the IAB host node, where the second request message is used to request the third configuration information.
The method according to claim 7, wherein the second request message includes at least one identifier of the neighboring cell.
The method according to claim 7, wherein the second request message includes a measurement report from the MT part of the first IAB node, and the measurement report includes at least one identifier of the neighboring cell and at least A measurement result corresponding to each neighboring cell in one of the neighboring cells; or,

The method also includes:

The first IAB node sends the measurement report to the IAB host node.
The method according to claim 9, wherein the measurement result corresponding to each neighboring cell in at least one of the neighboring cells in the measurement report is greater than a first set threshold.
The method according to claim 1 or 2, wherein the method further comprises:

The first IAB node receives the system broadcast message of the first cell, the system broadcast message includes the identity of the serving node to which the first cell belongs, and the identity of the serving node includes the reply of the serving node. It transmits the BAP layer address of the adaptation protocol, and/or the layer 2 identifier of the service node in the side link.
The method according to any one of claims 1 to 11, wherein the method further comprises:

The first IAB node receives the reference signal from the first cell, and the received power of the reference signal is greater than or equal to a second preset threshold.
The method according to any one of claims 1 to 12, wherein the resource configuration includes one or more of the following:

Transmission power configuration, uplink and downlink transmission subframe configuration , synchronization signal and physical broadcast channel block configuration.
A resource coordination method, characterized in that the method includes:

The access backhaul integrated IAB host node generates first configuration information and/or second configuration information, where the first configuration information includes the identification of each child node of the first IAB node and one or more services served by each child node The identity of the cell, where the second configuration information includes the identity of the parent node of the first IAB node and the identity of one or more cells served by the parent node;

The IAB host node sends the first configuration information and/or the second configuration information to the first IAB node.
The method according to claim 14, wherein the identifier of the child node includes one or more of the following:

The BAP layer address of the child node, the cell radio network temporary identifier C-RNTI allocated to the child node by the first IAB node, the C-RNTI allocated to the child node by the first IAB node and the A combination of the cell identity of the cell where the child node accesses the first IAB node, and the layer 2 identity of the child node in the side link;

The identifier of the parent node includes one or more of the following:

The BAP layer address of the parent node, the identifier of the DU part of the distributed unit of the parent node, the C-RNTI allocated by the grandfather node of the first IAB node to the parent node, and the parent node in the grandfather The combination of the cell identity of the cell that the node accesses, and the layer 2 identity of the parent node in the side link.
The method according to claim 14 or 15, wherein the method further comprises:

The IAB host node receives a first request message from the first IAB node, where the first request message is used to request the first configuration information and/or the second configuration information.
The method according to any one of claims 14 to 16, wherein the method further comprises:

The IAB donor node sends third configuration information to the first IAB node, where the third configuration information includes the identity of the serving node to which at least one neighboring cell of the first IAB node belongs, and the identity of the serving node Including the BAP layer address of the serving node, and/or the layer 2 identifier of the serving node in the side link, the side link being the wireless direct communication link between the mobile terminal MT part of the IAB node road.
The method according to claim 17, wherein the method further comprises:

The IAB host node receives a second request message from the first IAB node, where the second request message is used to request the third configuration information.
The method according to claim 18, wherein the second request message includes at least one identifier of the neighboring cell.
The method according to claim 18, wherein the second request message includes a measurement report from the MT part of the first IAB node, and the measurement report includes at least one identifier of the neighboring cell and at least A measurement result corresponding to each neighboring cell in one of the neighboring cells; or,

The method also includes:

The IAB host node receives the measurement report from the first IAB node or the terminal device served by the first IAB node.
The method according to claim 20, wherein the measurement result corresponding to each neighboring cell in at least one of the neighboring cells in the measurement report is greater than a first set threshold.
A resource coordination method, characterized in that the method includes:

The access backhaul integrated IAB host node sends third configuration information to the first IAB node, where the third configuration information includes the identity of the serving node to which at least one neighboring cell of the first IAB node belongs, and the serving node The identifier includes the BAP layer address of the backhaul adaptation protocol of the serving node, and/or the layer 2 identifier of the serving node in the side link, which is one of the mobile terminal MT part of the IAB node Direct wireless communication link between.
The method of claim 22, wherein the method comprises:

The IAB host node receives a second request message from the first IAB node, where the second request message is used to request the third configuration information.
The method according to claim 23, wherein the second request message includes an identifier of the at least one neighboring cell.
The method according to claim 23 or 24, wherein the second request message includes a measurement report of the MT part of the first IAB node, and the measurement report includes an identifier of the at least one neighboring cell A measurement result corresponding to each of the at least one neighboring cell;

Alternatively, the method further includes: the IAB host node receiving the measurement report from the first IAB node or a terminal device served by the first IAB node.
The method according to claim 25, wherein the measurement result corresponding to each neighboring cell in the at least one neighboring cell in the measurement report is greater than a first set threshold.
A resource coordination method, characterized in that the method includes:

The access backhaul integrated IAB host node generates a system broadcast message, the system broadcast message includes the identifier of the IAB host node, and the identifier of the IAB host node includes the backhaul adaptation protocol BAP layer of the IAB host node address;

The IAB host node sends the system broadcast message in the first cell served.
A resource coordination method, characterized in that the method includes:

The second access backhaul integrated IAB node generates a system broadcast message, the system broadcast message includes the identifier of the second IAB node, and the identifier of the second IAB node includes the backhaul of the second IAB node. The BAP layer address of the configuration protocol, and/or the layer 2 identifier of the second IAB node in the side link, the side link being the wireless direct communication link between the mobile terminal MT part of the IAB node;

The second IAB node sends the system broadcast message in the served first cell.
A communication device, characterized in that the communication device includes at least one processor and a memory, and the processor is coupled with the memory:

The processor is configured to execute computer programs or instructions stored in the memory, so that the communication device executes the method according to any one of claims 1 to 13.
A communication device, characterized in that the communication device includes at least one processor and a memory, and the processor is coupled with the memory:

The processor is configured to execute a computer program or instruction stored in the memory, so that the communication device executes the method according to any one of claims 14 to 21, or, 22 to 26, or 27.
A communication device, characterized in that the communication device includes at least one processor and a memory, and the processor is coupled with the memory:

The processor is configured to execute computer programs or instructions stored in the memory, so that the communication device executes the method according to claim 28.
A communication device, characterized in that it comprises a processor and an interface circuit;

The interface circuit is used to exchange code instructions to the processor;

The processor is configured to execute the code instructions to execute the method according to any one of claims 1 to 13.
A communication device, characterized in that it comprises a processor and an interface circuit;

The interface circuit is used to exchange code instructions to the processor;

The processor is used to run the code instructions to execute the method according to any one of claims 14 to 21, or, 22 to 26, or 27.
A communication device, characterized in that it comprises a processor and an interface circuit;

The interface circuit is used to exchange code instructions to the processor;

The processor is configured to execute the code instructions to execute the method according to claim 28.
A communication device, characterized in that the communication device is used to execute the method according to any one of claims 1 to 13.
A communication device, characterized in that the communication device is used to execute the method according to any one of claims 14 to 21, or, 22 to 26, or 27.
A communication device, characterized in that the communication device is used to execute the method of claim 28.
A computer-readable storage medium, characterized in that it is used to store instructions, and when the instructions are executed, the method according to any one of claims 1 to 28 is realized.
A computer program product, characterized in that when a computer reads and executes the computer program product, the computer is caused to execute the method according to any one of claims 1 to 28.
A communication system, characterized by comprising the communication device according to claim 29 or 32 or 35, the communication device according to claim 30 or 33 or 36, and the communication device according to claim 31 or 34 or 37 Communication device.