WO2021163861A1 - Communication method and device - Google Patents

Abstract

A communication method and device, used for realizing information symmetry of related information required for routing among a plurality of nodes, thereby enabling a control node to accurately realize routing control of an accessed IAB node. The method comprises: the control node sends a first configuration message to an MT of the IAB node, the first configuration message comprising a first identifier allocated by the control node to a DU of the IAB node; the control node sends a first message to an IAB donor, the first message comprising the first identifier. Therefore, information symmetry of related information required for routing among a plurality of nodes is realized, thereby enabling the control node to accurately realize routing control of the accessed IAB node.

Description

Communication method and device Technical field

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

Background technique

Integrated access and backhaul (IAB) means that both the access link and the backhaul link of the base station are transmitted wirelessly. This technology can replace the traditional optical fiber backhaul link, thereby avoiding a large number of optical fiber deployments, so it can improve the flexibility of network deployment and reduce the cost of network deployment.

There are two types of nodes in the IAB network: IAB host (IAB Donor) and IAB node (IAB node). Among them, the IAB host is directly connected to the core network, which can provide access services for terminal devices, and can also provide the IAB-node with a backhaul exit to the core network. The IAB node is not directly connected to the core network, but is connected to the IAB host through (single-hop or multi-hop) wireless backhaul, and the IAB host returns to the core network. The IAB node can provide access services for terminal equipment, and can also provide relays for backhaul links for other IAB nodes.

In some IAB scenarios, the controller covers multiple IAB nodes under the IAB Donor. Through low frequency and wide coverage, the control node can support the access of multiple IAB Donor IAB nodes, so as to control the access of these IAB nodes and the routing among IAB nodes. However, since the control node and the IAB Donor node both have independent configuration information for the IAB node, the control node does not know the relevant configuration information during routing control and cannot realize the routing control of the accessed IAB node.

Summary of the invention

The present application provides a communication method and device, which are used to realize information symmetry between multiple nodes for related information required for routing, so that the control node can accurately implement the routing control of the accessed IAB node.

In the first aspect, the present application provides a communication method. The method includes: a control node sends a first configuration message to a mobile terminal (mobile termination, MT) of an IAB node, where the first configuration message includes that the control node is The first identifier assigned by the distributed unit (DU) of the IAB node; the control node sends a first message to the IAB host, and the first message includes the first identifier.

Through the above method, both the control node and the IAB host can know the ID of the DU of the IAB node, and the information required for routing can be symmetric among multiple nodes, that is, the DU of the IAB node in the control node and the IAB host can be realized. The identifiers are consistent, so that the control node can accurately implement routing control of the accessed IAB node.

In a possible design, the first message further includes a second identifier allocated by the control node to the MT of the IAB node. In this way, the IAB host can also know the identifier assigned by the control node to the MT of the IAB node, so as to associate all the identifiers of the IAB node.

In a possible design, the control node receives a fourth message, the fourth message includes at least one third identifier of the MT of the IAB node, and the at least one third identifier is at least one of the IAB node's MT. A parent node is allocated separately. In this way, the control node can know the identities allocated by other nodes for the MT of the IAB node, and then associate the relevant identities of the IAB node.

In a possible design, the fourth message also includes the identity of the cell of the IAB node. In this way, the control node can more accurately implement the routing control of the IAB node according to the identity of the cell.

In a possible design, the control node receiving the fourth message may specifically be: the control node receives the fourth message from the MT of the IAB node; or, the control node receives the fourth message from the IAB host The fourth message. In this way, the control node can obtain the identifier allocated by other nodes for the MT of the IAB node in a variety of ways.

In a possible design, based on at least one of the first identifier, the second identifier, or the at least one third identifier, the control node performs the The routing information of the IAB node is updated. In this way, the control node can accurately implement routing control of the accessed IAB node.

In a possible design, the second identifier is a first backhaul adaptation protocol (backhaul adaptation protocol, BAP) identifier.

In a possible design, the first identifier is a second BAP identifier.

In a second aspect, the present application provides a communication method, the method includes: an IAB host receives a first message from a control node, the first message includes a first identifier allocated by the control node to a DU of the IAB node; The IAB host receives a second message from the DU of the IAB node, and the second message includes the first identifier.

Through the above method, both the control node and the IAB host can know the ID of the DU of the IAB node, and the information required for routing can be symmetric among multiple nodes, that is, the DU of the IAB node in the control node and the IAB host can be realized. The identifiers are consistent, so that the control node can accurately implement routing control of the accessed IAB node.

In a possible design, the first message further includes a second identifier allocated by the control node to the MT of the IAB node. In this way, the IAB host can also know the identifier assigned by the control node to the MT of the IAB node, so as to associate all the identifiers of the IAB node.

In a possible design, the IAB host receives a third message from the MT of the IAB node, and the third message includes the second identifier. In this way, the IAB host uses the identifier of the MT of the accessed IAB node to identify the identifier assigned by the control node to the MT of the IAB node, thereby achieving information symmetry.

In a possible design, the second identifier is the first BAP identifier.

In a possible design, the IAB host sends a fourth message to the control node, where the fourth message includes at least one third identifier of the MT of the IAB node, wherein the at least one third identifier is At least one parent node of the IAB node is allocated separately. In this way, the control node can know the identities allocated by other nodes for the MT of the IAB node, and then associate the relevant identities of the IAB node.

In a possible design, the fourth message also includes the identity of the cell of the IAB node. In this way, the control node can more accurately implement the routing control of the IAB node according to the identity of the cell.

In a possible design, the first identifier is a second BAP identifier.

In a third aspect, the present application provides a communication method. The method may include: an MT in an IAB node receives a first configuration message from a control node, and the first configuration message includes that the control node is the IAB node. The first identifier assigned by the DU; the DU of the IAB node sends a second message to the IAB host, and the second message includes the first identifier.

Through the above method, both the control node and the IAB host can know the ID of the DU of the IAB node, and the information required for routing can be symmetric among multiple nodes, that is, the DU of the IAB node in the control node and the IAB host can be realized. The identifiers are consistent, so that the control node can accurately implement routing control of the accessed IAB node.

In a possible design, the MT of the IAB node sends a third message to the IAB host, and the third message includes the second identifier allocated by the control node to the MT of the IAB node. In this way, the IAB host uses the identifier of the MT of the accessed IAB node to identify the identifier assigned by the control node to the MT of the IAB node, thereby achieving information symmetry.

In a possible design, the second identifier is the first BAP identifier.

In a possible design, the first identifier is a second BAP identifier.

In a fourth aspect, the present application provides a communication method. The method may include: a control node receives a fifth message from an IAB node, the fifth message includes at least one of the following: at least one fourth identifier, a fifth identifier, and The identifier of the cell accessed by the IAB node or the cell identifier of the DU of the IAB node, the at least one fourth identifier is allocated by at least one parent node of the IAB node for the MT of the IAB node, and the first The five identifier is the identifier of the DU of the IAB node; then, the control node is based on the at least one fourth identifier, the fifth identifier, the identifier of the cell accessed by the IAB node, or the DU of the IAB node At least one of the covered cell identifiers configures routing information for the IAB node.

The IAB node actively reports the access information of the IAB node to realize the information symmetry of the related information required for routing among multiple nodes, so that the control node can accurately implement the routing control of the accessed IAB node.

In a possible design, the control node sends the routing information to the IAB node. In order to facilitate accurate routing of the subsequent IAB nodes.

In a possible design, the control node sends the routing information to the at least one parent node and the IAB host. So that the IAB host and at least one parent node update routing information about the IAB node, so that the routing is accurate.

In a possible design, the routing information includes at least one of the following: the BAP identifier of the MT of the IAB node, the BAP identifier of the DU of the IAB node, the routing table information of the IAB node, or the IAB node The routing table update information. In this way, the routing control of the IAB node can be accurately implemented according to the routing information.

In a possible design, the routing table information includes a destination address, a next hop address, and a path number; the routing table update information indicates adding/deleting a path information, and the path information includes a destination address, a next hop Address, path number. In this way, the routing of the IAB node can be accurately realized.

In a fifth aspect, the present application provides a communication method, the method includes: an IAB node sends a fifth message to a control node, the fifth message includes at least one of the following: at least one fourth identifier, at least one fifth identifier, The identifier of the cell accessed by the IAB node or the list of cell identifiers covered by the DU of the IAB node, and the at least one fourth identifier is allocated by at least one parent node of the IAB node for the MT of the IAB node, The at least one fifth identifier is the identifier of the DU of the IAB node; the IAB node receives routing information from the control node, and the routing information is the control node based on the at least one fourth identifier, the At least one of the fifth identifier, the identifier of the cell accessed by the IAB node, or the list of cell identifiers covered by the DU in the IAB node is configured by the IAB node. The IAB node actively reports the access information of the IAB node to realize the information symmetry of the related information required for routing among multiple nodes, so that the control node can accurately implement the routing control of the accessed IAB node.

In a possible design, the routing information includes at least one of the following: the BAP identifier of the MT of the IAB node, the BAP identifier of the DU of the IAB node, the routing table information of the IAB node, or the IAB node The routing table update information. In this way, the routing control of the IAB node can be accurately implemented according to the routing information.

In a possible design, the routing table information includes a destination address, a next hop address, and a path number; the routing table update information indicates adding/deleting a path information, and the path information includes a destination address, a next hop Address, path number. In this way, the routing of the IAB node can be accurately realized.

In a sixth aspect, the present application provides a communication method, the method includes: a first device sends a configuration message to the MT of the IAB node, the configuration message includes that the first device allocates a DU in the IAB node The sixth identifier; the first device receives a sixth message from the DU of the IAB node, and the sixth message includes the sixth identifier.

Through the above method, it is possible to achieve information symmetry between multiple nodes for related information required for routing, so that the first device can accurately implement routing control of the accessed IAB node.

In a possible design, the first device updates the routing information for the IAB node in at least one parent node of the IAB node based on the sixth identifier. In this way, the routing of the IAB node can be accurately implemented according to the updated routing information.

In a possible design, the first device is a control node or an IAB host. In this way, the routing control of the control node or the IAB host with the control node function to the IAB node can be realized.

In a seventh aspect, the present application provides a communication method, the method includes: an MT of an IAB node receives configuration information from a first device, and the configuration information includes a sixth device allocated by the first device to the DU of the IAB node. Identifier; the DU in the IAB node sends a sixth message to the first device, and the sixth message includes the sixth identifier.

Through the above method, it is possible to achieve information symmetry between multiple nodes for related information required for routing, so that the first device can accurately implement routing control of the accessed IAB node.

In a possible design, the first device is a control node or an IAB host. In this way, the routing control of the control node or the IAB host with the control node function to the IAB node can be realized.

In an eighth aspect, the present application also provides a communication device, the communication device may be a control node, and the communication device has various possible design examples, the fourth aspect, or the fourth aspect for implementing the first aspect or the first aspect. The function of each possible design example. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible design, the structure of the communication device includes a communication unit and a processing unit, and these units can implement each possible design example of the first aspect or the first aspect, the fourth aspect or the fourth aspect. For the corresponding functions of the design example, refer to the detailed description in the method example for details, which will not be repeated here.

In a possible design, the structure of the communication device includes a communication interface, a processor, and optionally a memory, and the communication interface is used for sending and receiving data, and for communicating and interacting with other devices in the communication system. The processor is configured to support the communication device to perform corresponding functions of the foregoing first aspect or each possible design example of the first aspect, and the fourth aspect or each possible design example of the fourth aspect. The memory is coupled with the processor, and it stores program instructions and data necessary for the communication device.

In a ninth aspect, this application also provides a communication device, the communication device may be an IAB host, and the communication device has the function of realizing the foregoing second aspect or each possible design example of the second aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible design, the structure of the communication device includes a communication unit and a processing unit, and these units can perform the corresponding functions of the second aspect or each possible design example of the second aspect. For details, please refer to the detailed description in the method example. Description, I won’t repeat it here.

In a possible design, the structure of the communication device includes a communication interface, a processor, and optionally a memory, and the communication interface is used for sending and receiving data, and for communicating and interacting with other devices in the communication system. The processor is configured to support the communication device to perform the corresponding functions of the foregoing second aspect or each possible design example of the second aspect. The memory is coupled with the processor, and it stores program instructions and data necessary for the communication device.

In a tenth aspect, the present application also provides a communication device, the communication device may be an IAB node, and the communication device has various possible design examples, the fifth aspect, or the fifth aspect of the third aspect or the third aspect. Function of each possible design example of the seventh aspect or each possible design example of the seventh aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible design, the structure of the communication device includes a communication unit and a processing unit, and these units can implement the above-mentioned third aspect or each possible design example of the third aspect, and each possible fifth aspect or the fifth aspect. For the corresponding functions of the design examples of the, the seventh aspect or the possible design examples of the seventh aspect, please refer to the detailed description in the method examples for details, which will not be repeated here.

In a possible design, the structure of the communication device includes a communication interface, a processor, and optionally a memory, and the communication interface is used for sending and receiving data, and for communicating and interacting with other devices in the communication system. , The processor is configured to support the communication device to execute each possible design example of the third aspect or the third aspect, each possible design example of the fifth aspect or the fifth aspect, the seventh aspect or the seventh aspect The corresponding function of each possible design example. The memory is coupled with the processor, and it stores program instructions and data necessary for the communication device.

In an eleventh aspect, the present application also provides a communication device, the communication device may be a first device, and the communication device has a function of realizing the aforementioned sixth aspect or each possible design example of the sixth aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible design, the structure of the communication device includes a communication unit and a processing unit, and these units can perform the corresponding functions of the above-mentioned sixth aspect or each possible design example of the sixth aspect. For details, please refer to the detailed description in the method example. Description, I won’t repeat it here.

In a possible design, the structure of the communication device includes a communication interface, a processor, and optionally a memory, and the communication interface is used for sending and receiving data, and for communicating and interacting with other devices in the communication system. The processor is configured to support the communication device to perform corresponding functions of the aforementioned sixth aspect or each possible design example of the sixth aspect. The memory is coupled with the processor, and it stores program instructions and data necessary for the communication device.

In the twelfth aspect, an embodiment of the present application provides a communication system, which may include the aforementioned control node, IAB host, and IAB node.

In the thirteenth aspect, a computer-readable storage medium provided by an embodiment of the present application. The computer-readable storage medium stores program instructions. When the program instructions are run on a computer, the computer executes the first aspect and Any of its possible designs, or any of the second or second aspects, or any of the third or third aspects, or any of the fourth or fourth aspects, or Either the fifth aspect or the fifth aspect may be designed, or the sixth aspect or the sixth aspect may be designed, or the seventh aspect or the seventh aspect may be designed. Exemplarily, the computer-readable storage medium may be any available medium that can be accessed by a computer. Take this as an example but not limited to: computer-readable media may include non-transitory computer-readable media, random-access memory (RAM), read-only memory (ROM), and electrically erasable In addition to programmable read-only memory (electrically EPROM, EEPROM), CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can Any other medium accessed by the computer.

In a fourteenth aspect, the embodiments of the present application provide a computer program product including computer program code or instructions, which when the computer program code or instructions are executed, enable the method described in any of the foregoing aspects to be implemented.

In a fifteenth aspect, this application also provides a chip, which is coupled with a memory, and is configured to read and execute program instructions stored in the memory to implement any of the above methods.

Description of the drawings

Figure 1 is a schematic diagram of the architecture of a radio access network (RAN) provided by this application;

FIG. 2 is a schematic diagram of the architecture of a CU provided by this application;

Figure 3 is a schematic diagram of the architecture of an IAB system provided by this application;

FIG. 4 is a schematic diagram of a user plane protocol stack of IAB provided by this application;

FIG. 5 is a schematic diagram of an IAB control plane protocol stack provided by this application;

FIG. 6 is a schematic diagram of the architecture of an IAB system deploying a centralized controller provided by this application;

FIG. 7 is a flowchart of a communication method provided by this application;

FIG. 8 is a flowchart of another communication method provided by this application;

FIG. 9 is a flowchart of another communication method provided by this application;

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

FIG. 11 is a structural diagram of another communication device provided by this application.

Detailed ways

The embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

The names of all nodes and messages in this application are only names set for the convenience of description. The names in the actual network may be different, and it should not be understood that this application limits the names of various nodes and messages.

It should be understood that in the embodiments of the present application, "at least one" refers to one or more, and "multiple" refers to two or more than two. "The following at least one (item)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a). For example, at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c It can be single or multiple.

In addition, it should be understood that in the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing description, and cannot be understood as indicating or implying relative importance, nor can it be understood as indicating Or imply the order.

The communication systems mentioned in the embodiments of this application include, but are not limited to: fifth generation mobile networks (5th generation mobile networks or 5th generation wireless systems, 5G), or communication systems or communication networks after 5G, etc., such as new wireless (new wireless) radio, NR) system, etc.

In order to better understand the embodiments of the present application, the following describes the network architecture used in the embodiments of the present application. Currently, the radio access network (RAN) architecture adopted in 5G NR can be shown in Figure 1. The NR base station (next generation node B, gNB) in the RAN architecture may be composed of a centralized unit (CU) and multiple distributed units (DU). Among them, as a logical node in 5G gNB, CU is mainly responsible for gNB radio resource control (radio resource control, RRC), service data adaptation protocol (service data adaptation protocol, SDAP) and packet data convergence protocol (packet data convergence protocol) , PDCP) layer protocols and functions. As another logical node in 5G gNB, DU is mainly responsible for gNB's radio link control (radio link control, RLC), media access control (medium access control, MAC) and physical layer (physical layer, PHY) protocols And function, part of DU function is controlled by CU. The CU and DU are defined and connected by the F1 application protocol layer (application protocol, AP) interface protocol.

Exemplarily, the CU may be further divided into a control plane (CU-control plane, CU-CP) and at least one user plane (CU-user plane, CU-UP), as shown in FIG. 2. Among them, CU-CP can be used for control plane management, undertaking RRC and PDCP control panel functions; CU-UP can be used for user plane data transmission, undertaking PDCP user plane and SDAP layer protocols and functions. The AP interface between CU-CP and CU-UP can be an E1 port. The application protocol layer interface between CU-CP and DU can be F1-C, which is used for the transmission of control plane signaling. The application protocol layer interface between CU-UP and DU can be F1-U, which is used for user plane data transmission. CU-UP and CU-UP can communicate through the application protocol layer Xn-U interface for user plane data transmission.

In this application, an IAB system suitable for the technical solution of this application includes at least one IAB donor (IAB donor), and one or more terminal devices served by the IAB host, and one or more IAB nodes (IAB node), and one or more terminal devices served by the IAB node. in:

The IAB host is directly connected to the core network and can provide access services for terminal devices, and can also provide IAB nodes with a backhaul exit to the core network.

The IAB node is not directly connected to the core network, but is connected to the IAB host through (single-hop or multi-hop) wireless backhaul, and the IAB host returns to the core network. The IAB node can provide access services for terminal devices, and can also provide relays for backhaul links for other IAB nodes. From the perspective of a terminal device, the IAB node it accesses is called an access IAB node (access IAB node), and the IAB node that returns the relay is called an intermediate IAB node (intermediate IAB-node).

The IAB host adopts a separated architecture and consists of two parts: CU and DU. The IAB node is composed of two parts: mobile termination (MT) and DU: the function of the MT part is equivalent to the function of the terminal device, and the IAB node connects to the upstream IAB node or IAB host through the MT; the function of the DU part is the same as that of the ordinary DU, IAB The node connects to the terminal device or downstream IAB node through the DU. There is an F1 interface (logical interface) between the IAB host CU and the IAB node DU, and the Uu interface between the IAB host DU or the IAB node DU and the downstream IAB node MT.

It should be noted that the MT of the IAB node is only an example of naming. In the future communication system or network, the MT may also be replaced by modules with equivalent functions, or may also have other naming, which is not limited in this application. In the description of the embodiments of the present application, the MT of the IAB node is taken as an example for description.

Terminal equipment includes but is not limited to: user equipment (UE), mobile station, access terminal, user unit, user station, mobile station, remote station, remote terminal, mobile equipment, terminal, wireless communication equipment, user agent, Station (ST), cell phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (wireless local loop, WLL) station in wireless local area network (wireless local access network, WLAN), cell phone, cordless phone, Personal digital assistant (PDA), handheld devices with wireless communication functions, computing devices, other processing devices connected to wireless modems, in-vehicle devices, wearable devices, mobile stations in the future 5G network, and public Any of the terminal devices in the public land mobile network (PLMN) network.

Exemplarily, FIG. 3 shows an example of the architecture of an IAB system. In Fig. 3, the terminal device is shown as a UE.

Specifically, in the IAB system, the user plane protocol stack of the IAB may be as shown in FIG. 4, and the control plane protocol stack of the IAB may be as shown in FIG. 5. Among them, the backhaul adaptation protocol (BAP) layer is a unique protocol layer of the IAB system, and is responsible for functions such as radio link control (radio link control, RLC) channel mapping and routing. It should be noted that the protocol stack shown in FIG. 4 and FIG. 5 is only a possible example, which is not limited in this application.

In the embodiments of the present application, a controller is introduced, wherein the wireless coverage area of a control node is larger than the coverage area of an IAB host. For example, the control node can work at a lower frequency to cover the coverage of multiple IAB hosts, so one control node can cover multiple IAB nodes under the coverage of multiple IAB hosts. The control node can centrally control multiple IAB nodes covered by the multiple IAB hosts. For example, it can implement at least one of the following functions: controlling access of IAB nodes, routing between IAB nodes, load balancing, and so on. Exemplarily, the architecture of an IAB system deploying a centralized controller may be as shown in FIG. 6, where the control node 1 can cover the IAB nodes connected to the IAB host 1 and the IAB host 2, that is, the IAB nodes 1 to 6 can be centrally controlled. The control node 2 can cover the IAB nodes connected to the IAB host 3 and the IAB host 4, that is, it can centrally control the IAB nodes 7-11. It should be understood that FIG. 6 is only an exemplary illustration, and does not specifically limit the number, connection relationship, deployment location, etc. of IAB nodes, IAB hosts, and control nodes in the IAB system.

In an IAB scenario where a control node is not deployed, a new IAB node or an IAB node in an idle state (Idle) accesses the network in the same process as a normal UE. The MT function module of the IAB node measures the surrounding IAB nodes or IAB hosts like ordinary UEs, and selects the node with the strongest signal for random access, and the accessed node is called the parent node. The IAB node then establishes an RRC connection with the IAB host CU where the parent node is located and a non-access stratum (NAS) connection with the core network. After the MT connection is established, the IAB host configures the RLC and BAP layers of the MT part of the IAB node. After the MT connection and configuration are completed, the DU of the IAB node initiates the establishment of a connection with the F1AP of the IAB host CU. At this point, the new IAB node access is complete, and can support the access and service of the UE and other new IAB nodes. When a new IAB node is added to the IAB network, the MT of the IAB can carry the DU (identification, ID) of the IAB node when it is connected to the IAB host. Therefore, the IAB host can associate the MT and the DU as belonging to the same IAB node. Alternatively, the DU of the IAB node carries the MT ID of the IAB node MT when establishing an F1 connection with the IAB host, so that the IAB host can associate the MT with the DU.

In an IAB scenario where a centralized control node is deployed, the IAB node will simultaneously access the control node and the IAB parent node (or IAB host). Therefore, the control node and the parent node (or the IAB host node) will each assign an ID to the MT of the IAB node, that is, the cell-radio network temporary identifier (C-RNTI). Currently, in the routing process of IAB nodes, the current routing information used by IAB routing control, such as routing ID, is to use the MT ID assigned to the MT based on the cell ID information and the cell ID for the node ID of the next hop, namely C-RNTI information. When the control node performs routing control on the IAB node, if the MT ID assigned by the control node is used, the IAB host or parent node does not know the ID and cannot find the destination according to the routing information; if the routing ID uses the MT ID assigned by the IAB host, The control node does not know the MT ID assigned to the IAB node by the IAB host. In addition, for the newly accessed IAB node, only the MT is accessed for the control node, so the DU information of the IAB node is not known to the control node. Therefore, the current control node cannot accurately implement the routing of the accessed IAB node. Based on this, the embodiments of the present application provide a communication method and device to realize information symmetry of related information required for routing among multiple nodes, so that the control node can accurately implement routing control of the accessed IAB node.

The embodiment of the present application provides a communication method. This method can be applied to the IAB system shown in FIG. 6. Referring to FIG. 7, the specific process of the method may include:

Step 701: The control node sends a first configuration message to the MT of the IAB node, where the first configuration message includes the first identifier allocated by the control node to the DU of the IAB node.

The first identifier is an ID that identifies the DU of the IAB node, and the first identifier may exist in various forms.

In an optional implementation manner, the first identifier may be a BAP identifier, and the control node assigns a BAP identifier to the DU of the IAB node.

Specifically, the control node may send the first configuration message to the MT of the IAB node through an RRC reconfiguration (RRC reconfiguration) message.

In an optional implementation manner, before step 701, the control node further executes step 700: the control node determines that the accessed MT belongs to the IAB node.

Step 702: The control node sends a first message to the IAB host, where the first message includes the first identifier.

In a specific implementation manner, the first message further includes a second identifier allocated by the control node to the MT of the IAB node. Wherein, optionally, the second identifier may be a BAP identifier, that is, the control node allocates a BAP identifier to the MT of the IAB node.

Specifically, the control node may send an Xn message (Xn message) to the IAB host through an Xn interface to carry the first message.

Step 703: The DU of the IAB node sends a second message to the IAB host, where the second message includes the first identifier.

In an optional implementation manner, the second message may be an F1 setup request (F1 setup request) message sent by the DU of the IAB node when the DU of the IAB node establishes an F1 connection with the IAB host.

In an optional implementation manner, before step 703, the MT of the IAB node further performs step 704: the MT of the IAB node sends a third message to the IAB host, and the third message contains all Mentioned second identification. Wherein, in an example, the third message may be an RRC setup request (RRC setup request) message sent by the MT of the IAB node when the MT of the IAB node establishes an RRC connection with the IAB host.

In an optional implementation manner, the control node receives a fourth message, where the fourth message includes at least one third identifier of the MT of the IAB node, wherein the at least one third identifier is the IAB At least one parent node of the node is allocated separately. Wherein, the parent node of the IAB node is an IAB node or an IAB host accessed by the IAB node.

In a specific implementation manner, the control node receiving the fourth message can be classified into the following two situations:

Case 1: The control node receives the fourth message from the MT of the IAB node, for example, as shown in step 705a in FIG. 7.

Case 2: The control node receives the fourth message from the IAB host, for example, as shown in step 705b in FIG. 7.

In a specific implementation manner, the control node may compare the at least one parent node and the IAB based on at least one of the first identifier, the second identifier, or the at least one third identifier. The routing information of the IAB node is updated in the host. That is, the control node sends a routing information update message to the at least one parent node and the IAB host, for example, as shown in step 706 in FIG. 7.

Using the communication method provided in the embodiments of the present application, both the control node and the IAB host can know the DU identifier of the IAB node, so that the information required for routing can be symmetric among multiple nodes, so that the control node can accurately realize the connection. Route control of incoming IAB nodes. Specifically, in the embodiment of the present application, the MT of the IAB node first accesses the control node, and then accesses the parent node and the IAB host. After the MT of the IAB node accesses the control node, the control node allocates the ID of the MT and the ID of the DU, and informs the IAB host of the allocated ID. When the IAB node connects to the IAB host, it carries the ID assigned by the control node, thereby achieving information symmetry. IAB's routing configuration is configured according to the ID assigned by the control node.

The embodiment of the present application also provides a communication method. This method can be applied to the IAB system shown in FIG. 6. In this embodiment, the control node first understands the ID information allocated by the IAB host to the IAB node after the IAB node accesses the IAB host. Referring to Figure 8, the specific process of the method may include:

Step 801: The IAB node sends a fifth message to the control node. The fifth message may include at least one of the following: at least one fourth identifier, a fifth identifier, the identifier of the cell accessed by the IAB node, or the IAB node The at least one fourth identifier is assigned by at least one parent node of the IAB node for the MT of the IAB node, and the fifth identifier is the identifier of the DU of the IAB node.

Specifically, before step 801, the IAB node has already accessed the control node in the existing manner, and the DU identifier (that is, the fifth identifier) of the IAB node and the cell identifier of the DU of the IAB node are both It is configured by operation and maintenance management (pperation administration and maintenance, OAM). For example, refer to steps 800a and 800b shown in FIG. 8. Exemplarily, in the IAB node access procedure in step 800a, the IAB host and at least one parent node of the IAB node are both assigned an identifier (that is, the fourth identifier) for the MT of the IAB node.

Exemplarily, the IAB node may send the fifth message to the control node through an existing RRC message or a newly defined RRC message. For example, the newly defined RRC message may be an IAB node information report (IAB node information report), etc. The name of the message is only an example, and this application does not limit it.

Step 802: The control node is based on at least one of the at least one fourth identifier, the at least one fifth identifier, the identifier of the cell accessed by the IAB node, or the cell identifier covered by the DU of the IAB node Configure routing information for the IAB node.

In an optional implementation manner, the control node further performs step 803: the control node sends the routing information to the IAB node. Specifically, the control node may send the routing information to the IAB node through an existing RRC message or a newly defined RRC message. For example, it may be through an RRC reconfiguration message (RRC reconfiguration) or a newly defined RRC message routing ID configuration (routing ID config) message, etc., where the message name is only an example, and this application does not limit this.

In an optional implementation manner, the control node further performs step 804: the control node sends the routing information to the at least one parent node and the IAB host. Specifically, the control node may send the routing information to the IAB host through an existing Xn message or a newly defined Xn message; and the control node may send the routing information to the IAB host through an existing RRC message or a newly defined RRC message At least one parent node sends the routing information. For example, the newly defined Xn message may be node information coordination (node information coordination), etc., where the message name is only an example, and this application does not limit this.

Specifically, the routing information may include at least one of the following: the BAP identifier of the MT of the IAB node, the BAP identifier of the DU of the IAB node, the routing table information of the IAB node, or the routing table of the IAB node Update information.

Exemplarily, the routing table information may include a destination address, a next hop address, and a path number; the routing table update information indicates adding/deleting a path information, and the path information includes a destination address, a next hop address, Path number.

Using the communication method provided by the embodiments of this application, the IAB node actively reports the access information of the IAB node to realize the information symmetry of the relevant information required for routing among multiple nodes, so that the control node can accurately realize the access information of the IAB node. Routing control.

It should be noted that in the IAB system shown in FIG. 6, the control node is independently deployed. In an optional manner, the control node can also be centrally deployed with other devices in the IAB system. For example, the control node can be centrally deployed with the IAB host. In this deployment mode, it can be understood that the IAB host can implement the control node Function. Based on this, the present application also provides a communication method, which can be implemented by a control node, and can also be implemented by an IAB host with the function of a control node. Referring to Figure 9, the specific process of the method may include:

Step 901: The first device sends a configuration message to the MT of the IAB node, where the configuration message includes the sixth identifier allocated by the first device to the DU in the IAB node.

Specifically, the first device may be a control node or an IAB host, and when the first device is the IAB host, the IAB host may implement the function of the control node.

Exemplarily, the first device may send the configuration message to the MT of the IAB node through an RRC reconfiguration message.

In an optional implementation manner, before step 901, the first device further performs step 900: the first device determines that the accessed MT belongs to the IAB node.

Step 902: The DU in the IAB node sends a sixth message to the first device, where the sixth message includes the sixth identifier.

In an optional implementation manner, the sixth message may be an F1 setup request message sent by the DU of the IAB node when the DU of the IAB node establishes an F1 connection with the IAB host.

In an optional implementation manner, the first device may update the routing information for the IAB node in at least one parent node of the IAB node based on the sixth identifier. For example, the routing information can be updated through the routing ID coordination process in step 903. Among them, the route ID coordination process is only an example of a name, which is not limited in this application.

By adopting the communication method provided by the embodiments of the present application, it is possible to achieve information symmetry between multiple nodes for the related information required for routing, so that the control node can accurately implement the routing control of the accessed IAB node.

It should be noted that, in addition to the foregoing, the control node can also be deployed centrally with the CU hosted by the IAB, and it can also be understood that the CU hosted by the IAB can implement the function of the control node. Furthermore, the control node can be deployed centrally with the CU-CP of the IAB host, and it can also be understood that the CU-CP of the IAB host can realize the function of the control node. Of course, the control node can also be deployed in other locations or centrally deployed with other devices. The deployment method of the control node is not specifically limited here.

Based on the above embodiments, an embodiment of the present application also provides a communication device. As shown in FIG. 10, the communication device 1000 may include a communication unit 1001 and a processing unit 1002. The communication unit 1001 is used for the communication device 1000 to receive information (message or data) or to send information (message or data), and the processing unit 1002 is used to control and manage the actions of the communication device 1000. The processing unit 1002 may also control the steps performed by the communication unit 1001.

Exemplarily, the communication device 1000 may be the control node in the foregoing embodiment, and specifically may be a processor, or a chip or a chip system, or a functional module in the control node; or, the communication device 1000 may It is the IAB host in the foregoing embodiment, and specifically may be a processor, or a chip or a chip system in the IAB host, or a functional module, etc.; or, the communication device 1000 may also be the IAB node in the foregoing embodiment Specifically, it may be a processor in the IAB node, or a chip or a chip system, or a functional module, etc.; or, the communication apparatus 1000 may also be the first device in the foregoing embodiment, and specifically may be the first device. A processor in a device, or a chip or a chip system, or a functional module, etc.

In an embodiment, when the communication device 1000 is used to implement the function of the control node in the embodiment described in FIG. 7, it may specifically include:

The communication unit 1001 is configured to send a first configuration message to a mobile terminal MT that accesses a backhaul integrated IAB node, where the first configuration message includes the first identifier assigned by the control node to the distribution unit DU of the IAB node; And sending a first message to the IAB host, where the first message includes the first identifier; the processing unit 1002 is configured to control the communication unit to send and receive data.

In an optional implementation manner, the first message further includes a second identifier allocated by the control node to the MT of the IAB node.

In an optional implementation manner, the communication unit 1001 is further configured to: receive a fourth message, where the fourth message includes at least one third identifier of the MT of the IAB node, wherein the at least one first The three identifiers are respectively allocated to at least one parent node of the IAB node.

In an optional implementation manner, when the communication unit 1001 receives the fourth message, it is specifically configured to: receive the fourth message from the MT of the IAB node; or, receive the fourth message from the IAB host Fourth news.

In an optional implementation manner, the processing unit 1002 is further configured to: based on at least one of the first identifier, the second identifier, or the at least one third identifier, The routing information for the IAB node in the parent node and the IAB host is updated.

In an optional implementation manner, the second identifier is a first backhaul adaptation protocol BAP identifier.

In an optional implementation manner, the first identifier is a second backhaul adaptation protocol BAP identifier.

In another embodiment, when the communication device 1000 is used to implement the function of the IAB host in the embodiment described in FIG. 7, it may specifically include:

The communication unit 1001 is configured to receive a first message from a control node, where the first message includes a first identifier allocated by the control node for the distribution unit DU that accesses the backhaul integrated IAB node; and, from the IAB node The DU receives a second message, and the second message includes the first identifier; the processing unit 1002 is configured to control the communication unit to send and receive data.

In an optional implementation manner, the first message further includes a second identifier allocated by the control node to the mobile terminal MT of the IAB node.

In an optional implementation manner, the communication unit 1001 is further configured to: receive a third message from the MT of the IAB node, where the third message includes the second identifier.

In an optional implementation manner, the second identifier is a first backhaul adaptation protocol BAP identifier.

In an optional implementation manner, the communication unit 1001 is further configured to: send a fourth message to the control node, where the fourth message includes at least one third identifier of the MT of the IAB node, where the The at least one third identifier is respectively allocated to at least one parent node of the IAB node.

In an optional implementation manner, the first identifier is a second backhaul adaptation protocol BAP identifier.

In another embodiment, when the communication device 1000 is used to implement the function of the IAB node in the embodiment shown in FIG. 7, it may specifically include:

The communication unit 1001 is configured to receive a first configuration message from a control node, where the first configuration message includes a first identifier assigned by the control node to the distribution unit DU of the access backhaul integrated IAB node; and, A second message is sent to the IAB host, where the second message includes the first identifier; the processing unit 1002 is configured to control the communication unit to send and receive data.

In an optional implementation manner, the communication unit 1001 is further configured to send a third message to the IAB host, where the third message includes a second identifier allocated by the control node to the MT of the IAB node.

In an optional implementation manner, the second identifier is a first backhaul adaptation protocol BAP identifier.

In an optional implementation manner, the first identifier is a second backhaul adaptation protocol BAP identifier.

It should be noted that when the communication device is used to implement the function of an IAB node, the communication unit 1001 may include a first communication unit and a second communication unit, where the first communication unit of the PHY corresponds to the IAB For the communication of the MT of the node, the second communication unit may correspond to the communication of the DU of the IAB node.

In another embodiment, when the communication device 1000 is used to implement the function of the control node in the embodiment shown in FIG. 8, it may specifically include:

The communication unit 1001 is configured to receive a fifth message from an IAB node, where the fifth message includes at least one of the following: at least one fourth identifier, a fifth identifier, the identifier of the cell accessed by the IAB node, or the identifier of the IAB node The cell identifier of the DU, the at least one fourth identifier is allocated by at least one parent node of the IAB node for the MT of the IAB node, and the fifth identifier is the identifier of the DU of the IAB node; processing unit 1002 Used to configure a route for the IAB node based on at least one of the at least one fourth identifier, the fifth identifier, the identifier of the cell accessed by the IAB node, or the cell identifier covered by the DU of the IAB node information.

In an optional implementation manner, the communication unit 1001 is further configured to send the routing information to the IAB node.

In an optional implementation manner, the communication unit 1001 is further configured to send the routing information to the at least one parent node and the IAB host.

In an optional implementation manner, the routing information includes at least one of the following: the BAP identifier of the MT of the IAB node, the BAP identifier of the DU of the IAB node, the routing table information of the IAB node, or the The routing table update information of the IAB node is described.

In an optional implementation manner, the routing table information includes a destination address, a next hop address, and a path number; the routing table update information indicates the addition/deletion of path information, and the path information includes the destination address, Next hop address, path number.

In another embodiment, when the communication device 1000 is used to implement the function of the IAB node in the embodiment shown in FIG. 8, it may specifically include:

The communication unit 1001 is configured to send a fifth message to the control node, where the fifth message includes at least one of the following: at least one fourth identifier, at least one fifth identifier, the identifier of the cell accessed by the IAB node, or the IAB A list of cell identifiers covered by the DU of the node, the at least one fourth identifier is allocated by the at least one parent node of the IAB node for the MT of the IAB node, and the at least one fifth identifier is the DU of the IAB node And, receiving routing information from the control node, where the routing information is the identity of the control node based on the at least one fourth identifier, the at least one fifth identifier, and the cell accessed by the IAB node Or at least one item in the list of cell identities covered by the DU in the IAB node is configured by the IAB node; the processing unit 1002 is configured to control the communication unit 1001 to send and receive data.

In an optional implementation manner, the routing information includes at least one of the following: the BAP identifier of the MT of the IAB node, the BAP identifier of the DU of the IAB node, the routing table information of the IAB node, or the The routing table update information of the IAB node is described.

In an optional implementation manner, the routing table information includes a destination address, a next hop address, and a path number; the routing table update information indicates the addition/deletion of a piece of path information, and the path information includes the destination address, Next hop address, path number.

In another embodiment, when the communication apparatus 1000 is used to implement the function of the first device in the embodiment shown in FIG. 9, it may specifically include:

The communication unit 1001 is configured to send a configuration message to the MT of the IAB node, the configuration message including the sixth identifier allocated by the first device for the DU in the IAB node; and, receive the sixth identifier from the DU of the IAB node. Message, the sixth message includes the sixth identifier; the processing unit 1002 is configured to control the communication unit 1001 to send and receive data.

In an optional implementation manner, the processing unit 1002 is further configured to update the routing information for the IAB node in at least one parent node of the IAB node based on the sixth identifier.

In an optional implementation manner, the first device is a control node or an IAB host.

In another embodiment, when the communication device 1000 is used to implement the function of the IAB node in the embodiment shown in FIG. 9, it may specifically include:

The communication unit 1001 is configured to receive configuration information from a first device, where the configuration information includes the sixth identifier allocated by the first device to the DU of the IAB node; and, send a sixth message to the first device, so The sixth message includes the sixth identifier; the processing unit 1002 is configured to control the communication unit 1001 to send and receive data.

In an optional implementation manner, the first device is a control node or an IAB host.

It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation. The functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated unit 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 all or 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 to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) 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 (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disks or optical disks and other media that can store program codes. .

Based on the above embodiments, an embodiment of the present application also provides a communication device. As shown in FIG. 11, the communication device 1100 may include a communication interface 1101 and a processor 1102. Optionally, the communication device 1100 may further include a memory 1103. Wherein, the memory 1103 may be disposed inside the communication device 1100, or may be disposed outside the communication device 1100. Wherein, the processor 1102 may control the communication interface 1101 to receive and send data.

Specifically, the processor 1102 may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP. The processor 1102 may further include a hardware chip. The above-mentioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.

Wherein, the communication interface 1101, the processor 1102, and the memory 1103 are connected to each other. Optionally, the communication interface 1101, the processor 1102, and the memory 1103 are connected to each other through a bus 1104; the bus 1104 may be a Peripheral Component Interconnect (PCI) bus or an extended industry standard Structure (Extended Industry Standard Architecture, EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, and so on. For ease of representation, only one thick line is used to represent in FIG. 11, but it does not mean that there is only one bus or one type of bus.

In an optional implementation manner, the memory 1103 is used to store programs and the like. Specifically, the program may include program code, and the program code includes computer operation instructions. The memory 1103 may include RAM, or may also include non-volatile memory, such as one or more disk memories. The processor 1102 executes the application program stored in the memory 1103 to realize the above-mentioned functions, thereby realizing the functions of the communication device 1100.

Exemplarily, the communication apparatus 1100 may be the control node, the IAB host, the IAB node, or the first device in the foregoing embodiment.

In an embodiment, when the communication device 1100 is used to implement the function of the control node in the embodiment described in FIG. 7, it may specifically include:

The communication interface 1101 is configured to send a first configuration message to the mobile terminal MT that accesses the backhaul integrated IAB node, where the first configuration message includes the first identifier assigned by the control node to the distribution unit DU of the IAB node; And sending a first message to the IAB host, where the first message includes the first identifier; the processor 1102 is configured to control the communication unit to send and receive data.

In an optional implementation manner, the first message further includes a second identifier allocated by the control node to the MT of the IAB node.

In an optional implementation manner, the communication interface 1101 is further configured to: receive a fourth message, where the fourth message includes at least one third identifier of the MT of the IAB node, wherein the at least one first The three identifiers are respectively allocated to at least one parent node of the IAB node.

In an optional implementation manner, when the communication interface 1101 receives the fourth message, it is specifically configured to: receive the fourth message from the MT of the IAB node; or, receive the fourth message from the IAB host Fourth news.

In an optional implementation manner, the processor 1102 is further configured to: based on at least one of the first identifier, the second identifier, or the at least one third identifier, The routing information for the IAB node in the parent node and the IAB host is updated.

In an optional implementation manner, the second identifier is a first backhaul adaptation protocol BAP identifier.

In an optional implementation manner, the first identifier is a second backhaul adaptation protocol BAP identifier.

In another embodiment, when the communication device 1100 is used to implement the function of the IAB host in the embodiment described in FIG. 7, it may specifically include:

The communication interface 1101 is configured to receive a first message from a control node, where the first message includes a first identifier allocated by the control node for access to the distribution unit DU of the backhaul integrated IAB node; and, from the IAB node The DU of receives a second message, and the second message includes the first identifier; the processor 1102 is configured to control the communication unit to send and receive data.

In an optional implementation manner, the first message further includes a second identifier allocated by the control node to the mobile terminal MT of the IAB node.

In an optional implementation manner, the communication interface 1101 is further configured to: receive a third message from the MT of the IAB node, and the third message includes the second identifier.

In an optional implementation manner, the second identifier is a first backhaul adaptation protocol BAP identifier.

In an optional implementation manner, the communication interface 1101 is further configured to send a fourth message to the control node, where the fourth message includes at least one third identifier of the MT of the IAB node, where the The at least one third identifier is respectively allocated to at least one parent node of the IAB node.

In an optional implementation manner, the first identifier is a second backhaul adaptation protocol BAP identifier.

In another embodiment, when the communication device 1100 is used to implement the function of the IAB node in the embodiment described in FIG. 7, it may specifically include:

The communication interface 1101 is configured to receive a first configuration message from a control node, where the first configuration message includes a first identifier assigned by the control node to the distribution unit DU of the access backhaul integrated IAB node; and, A second message is sent to the IAB host, where the second message includes the first identifier; the processor 1102 is configured to control the communication unit to send and receive data.

In an optional implementation manner, the communication interface 1101 is further configured to send a third message to the IAB host, where the third message includes the second identifier allocated by the control node to the MT of the IAB node.

In an optional implementation manner, the second identifier is a first backhaul adaptation protocol BAP identifier.

In an optional implementation manner, the first identifier is a second backhaul adaptation protocol BAP identifier.

In another embodiment, when the communication device 1100 is used to implement the function of the control node in the embodiment described in FIG. 8, it may specifically include:

The communication interface 1101 is configured to receive a fifth message from an IAB node, and the fifth message includes at least one of the following: at least one fourth identifier, a fifth identifier, the identifier of the cell accessed by the IAB node, or the identifier of the IAB node The cell identifier of the DU, the at least one fourth identifier is allocated by at least one parent node of the IAB node for the MT of the IAB node, and the fifth identifier is the identifier of the DU of the IAB node; the processor 1102 Used to configure a route for the IAB node based on at least one of the at least one fourth identifier, the fifth identifier, the identifier of the cell accessed by the IAB node, or the cell identifier covered by the DU of the IAB node information.

In an optional implementation manner, the communication interface 1101 is further configured to send the routing information to the IAB node.

In an optional implementation manner, the communication interface 1101 is further configured to send the routing information to the at least one parent node and the IAB host.

In an optional implementation manner, the routing information includes at least one of the following: the BAP identifier of the MT of the IAB node, the BAP identifier of the DU of the IAB node, the routing table information of the IAB node, or the The routing table update information of the IAB node is described.

In an optional implementation manner, the routing table information includes a destination address, a next hop address, and a path number; the routing table update information indicates the addition/deletion of path information, and the path information includes the destination address, Next hop address, path number.

In another embodiment, when the communication device 1100 is used to implement the function of the IAB node in the embodiment described in FIG. 8, it may specifically include:

The communication interface 1101 is configured to send a fifth message to the control node, where the fifth message includes at least one of the following: at least one fourth identifier, at least one fifth identifier, the identifier of the cell accessed by the IAB node, or the IAB A list of cell identifiers covered by the DU of the node, the at least one fourth identifier is allocated by the at least one parent node of the IAB node for the MT of the IAB node, and the at least one fifth identifier is the DU of the IAB node And, receiving routing information from the control node, where the routing information is the identity of the control node based on the at least one fourth identifier, the at least one fifth identifier, and the cell accessed by the IAB node Or at least one item in the list of cell identities covered by the DU in the IAB node is configured by the IAB node; the processor 1102 is configured to control the communication interface 1101 to send and receive data.

In an optional implementation manner, the routing information includes at least one of the following: the BAP identifier of the MT of the IAB node, the BAP identifier of the DU of the IAB node, the routing table information of the IAB node, or the The routing table update information of the IAB node is described.

In an optional implementation manner, the routing table information includes a destination address, a next hop address, and a path number; the routing table update information indicates the addition/deletion of path information, and the path information includes the destination address, Next hop address, path number.

In another embodiment, when the communication apparatus 1100 is used to implement the function of the first device in the embodiment shown in FIG. 9, it may specifically include:

The communication interface 1101 is configured to send a configuration message to the MT of the IAB node, where the configuration message includes the sixth identifier allocated by the first device to the DU in the IAB node; and, receive the sixth identifier from the DU of the IAB node. Message, the sixth message includes the sixth identifier; the processor 1102 is configured to control the communication interface 1101 to send and receive data.

In an optional implementation manner, the processor 1102 is further configured to update the routing information for the IAB node in at least one parent node of the IAB node based on the sixth identifier.

In an optional implementation manner, the first device is a control node or an IAB host.

In another embodiment, when the communication device 1100 is used to implement the function of the IAB node in the embodiment shown in FIG. 9, it may specifically include:

The communication interface 1101 is configured to receive configuration information from a first device, where the configuration information includes the sixth identifier allocated by the first device to the DU of the IAB node; and, send a sixth message to the first device, so The sixth message includes the sixth identifier; the processor 1102 is configured to control the communication interface 1101 to send and receive data.

In an optional implementation manner, the first device is a control node or an IAB host.

Based on the above embodiments, the embodiments of the present application provide a communication system. The communication system may include the control node, the IAB host, and the IAB node involved in the above embodiment.

The embodiments of the present application also provide a computer-readable storage medium, where the computer-readable storage medium is used to store a computer program. When the computer program is executed by a computer, the computer can implement the communication method provided in the above method embodiment.

The embodiments of the present application also provide a computer program product, where the computer program product is used to store a computer program. When the computer program is executed by a computer, the computer can implement the communication method provided in the foregoing method embodiment.

Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

This application is described with reference to flowcharts and/or block diagrams of methods, equipment (systems), and computer program products according to this application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment can be used to generate It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

Obviously, those skilled in the art can make various changes and modifications to this application without departing from the protection scope of this application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, then this application is also intended to include these modifications and variations.

Claims (30)

A communication method, characterized in that it comprises: The control node sends a first configuration message to the mobile terminal MT that accesses the backhaul integrated IAB node, where the first configuration message includes the first identifier allocated by the control node to the distribution unit DU of the IAB node; The control node sends a first message to the IAB host, where the first message includes the first identifier. The method according to claim 1, wherein the first message further includes a second identifier allocated by the control node to the MT of the IAB node. The method according to claim 1 or 2, wherein the method further comprises: The control node receives a fourth message, where the fourth message includes at least one third identifier of the MT of the IAB node, where the at least one third identifier is respectively allocated by at least one parent node of the IAB node. The method according to claim 3, wherein the receiving of the fourth message by the control node comprises: The control node receives the fourth message from the MT of the IAB node; or The control node receives the fourth message from the IAB host. The method according to claim 3 or 4, wherein the method further comprises: The control node performs routing information on the at least one parent node and the IAB host for the IAB node based on at least one of the first identifier, the second identifier, or the at least one third identifier Update. A communication method, characterized in that it comprises: The access backhaul integrated IAB host receives a first message from the control node, where the first message includes the first identifier allocated by the control node to the distribution unit DU of the IAB node; The IAB host receives a second message from the DU of the IAB node, and the second message includes the first identifier. The method according to claim 6, wherein the first message further includes a second identifier allocated by the control node to the mobile terminal MT of the IAB node. The method according to claim 7, wherein the method further comprises: The IAB host receives a third message from the MT of the IAB node, and the third message includes the second identifier. The method according to any one of claims 6-8, wherein the method further comprises: The IAB host sends a fourth message to the control node, where the fourth message includes at least one third identifier of the MT of the IAB node, where the at least one third identifier is at least one parent of the IAB node The nodes are allocated separately. A communication method, characterized in that it comprises: The mobile terminal MT that accesses the integrated backhaul IAB node receives a first configuration message from the control node, where the first configuration message includes the first identifier allocated by the control node to the distribution unit DU of the IAB node; The DU of the IAB node sends a second message to the IAB host, where the second message includes the first identifier. The method of claim 10, wherein the method further comprises: The MT of the IAB node sends a third message to the IAB host, where the third message includes the second identifier allocated by the control node to the MT of the IAB node. A communication device, characterized in that it comprises: The communication unit is configured to send a first configuration message to the mobile terminal MT that accesses the backhaul integrated IAB node, where the first configuration message includes the first identifier assigned by the control node to the distribution unit DU of the IAB node; and Sending a first message to the IAB host, where the first message includes the first identifier; The processing unit is used to control the communication unit to send and receive data. The apparatus according to claim 12, wherein the first message further includes a second identifier allocated by the control node to the MT of the IAB node. The device according to claim 12 or 13, wherein the communication unit is further configured to: A fourth message is received, where the fourth message includes at least one third identifier of the MT of the IAB node, where the at least one third identifier is respectively allocated by at least one parent node of the IAB node. The device according to claim 14, wherein when the communication unit receives the second message, it is specifically configured to: Receiving the fourth message from the MT of the IAB node; or Receiving the fourth message from the IAB host. The device according to claim 14 or 15, wherein the processing unit is further configured to: The routing information for the IAB node in the at least one parent node and the IAB host is updated based on at least one of the first identifier, the second identifier, or the at least one third identifier. The apparatus according to any one of claims 13-16, wherein the second identifier is a first backhaul adaptation protocol BAP identifier. The apparatus according to any one of claims 12-17, wherein the first identifier is a second backhaul adaptation protocol BAP identifier. A communication device, characterized in that it comprises: The communication unit is configured to receive a first message from the control node, where the first message includes a first identifier allocated by the control node for the distribution unit DU that accesses the backhaul integrated IAB node; and Receiving a second message from the DU of the IAB node, where the second message includes the first identifier; The processing unit is used to control the communication unit to send and receive data. The apparatus according to claim 19, wherein the first message further comprises a second identifier allocated by the control node to the mobile terminal MT of the IAB node. The device according to claim 20, wherein the communication unit is further configured to: A third message is received from the MT of the IAB node, where the third message includes the second identifier. The device according to claim 20 or 21, wherein the second identifier is a first backhaul adaptation protocol BAP identifier. 22. The device according to any one of claims 19-22, wherein the communication unit is further configured to: A fourth message is sent to the control node, where the fourth message includes at least one third identifier of the MT of the IAB node, where the at least one third identifier is respectively allocated by at least one parent node of the IAB node . The device according to any one of claims 19-23, wherein the first identifier is a second backhaul adaptation protocol BAP identifier. A communication device, characterized in that it comprises: The communication unit is configured to receive a first configuration message from a control node, where the first configuration message includes a first identifier assigned by the control node to the distribution unit DU of the access backhaul integrated IAB node; and Sending a second message to the IAB host, where the second message includes the first identifier; The processing unit is used to control the communication unit to send and receive data. The device according to claim 25, wherein the communication unit is further configured to: A third message is sent to the IAB host, where the third message includes the second identifier allocated by the control node to the MT of the IAB node. A communication device, comprising a processor and a communication interface, the communication interface is used to communicate with other communication devices; the processor is used to enable the communication device to implement any one of claims 1-5 The method described. A communication device, characterized by comprising a processor and a communication interface, the communication interface is used to communicate with other communication devices; the processor is used to enable the communication device to implement any one of claims 6-9 The method described. A communication device, characterized in that it comprises a processor and a communication interface, the communication interface is used to communicate with other communication devices; the processor is used to enable the communication device to implement any one of claims 10-11 The method described. A computer-readable storage medium, characterized in that computer-readable instructions are stored in the computer-readable storage medium, and when the computer-readable instructions run on a communication device, the communication device executes claim 1 -11 The method of any one.

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