Communication method and communication apparatus

Abstract

Provided in the present application are a communication method and a communication apparatus. The method may comprise: receiving system information of a cell; and when the system information does not comprise first indication information, receiving second indication information, wherein the second indication information is used for determining whether the cell prohibits access by a first relay node, and the first indication information indicates whether the cell prohibits access by relay nodes, or the indication information indicating that the cell is a cell for a second relay node. On this basis, a network device can perform access control on wireless access and backhaul mobile terminals.

Description

Communication methods and communication devices

[0001] This application claims priority to Chinese Patent Application No. 202411587752.2, filed on November 7, 2024, entitled "Communication Method and Communication Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communications, and more specifically, to a communication method and a communication apparatus. Background Technology

[0003] In the field of mobile communication topology enhancement, a new architecture based on wireless access and backhaul (WAB) is being researched. The application scenario of the WAB architecture can be vehicle mounted relay (VMR), where relay nodes are deployed on vehicles (or even airplanes) to provide wireless coverage for terminals inside the vehicle, overcoming the problem of poor wireless signal inside the vehicle. The relay nodes access macro stations (also known as host access network nodes) through wireless backhaul. In the WAB architecture, the relay nodes can be called WAB nodes.

[0004] A WAB node can include both next-generation NodeB (gNB) and mobile terminal (MT) functions. As the first step in the WAB node's network access process, MT access can be the same as that of a regular user equipment (UE). After the MT powers on, it searches for a synchronization signal and PBCH block (SSB), camps on a suitable cell, and then initiates random access. Therefore, how network equipment controls the access of WAB-MTs is a problem that urgently needs to be solved in this field. Summary of the Invention

[0005] This application provides a communication method and a communication device that enables network devices to control access to wireless access and backhaul mobile terminals (WAB-MT).

[0006] Firstly, a communication method is provided. This method can be applied to a first relay node; that is, the method can be executed by the first relay node itself, or by its constituent components (such as a chip, chip system, circuit, communication module, or processor). This application does not limit the scope of the method. The following description primarily uses the first relay node as an example.

[0007] The method may include: receiving system information of a cell; and if the system information does not include first indication information, receiving second indication information, the second indication information being used to determine whether the cell prohibits the first relay node from accessing, wherein the first indication information indicates whether the cell prohibits the relay node from accessing, or the first indication information indicates that the cell is a cell of the second relay node.

[0008] Based on the above technical solution, if the system information received by the first relay node from the cell does not include the first indication information, the first relay node can also receive the second indication information and determine whether the cell prohibits the first relay node from accessing based on the second indication information. For example, for a first network device that sends system information from the cell that does not include the first indication information, the first network device can also implement access control for the first relay node through the second indication information. Based on this, a network device that does not send the first indication information can implement access control for the relay node.

[0009] Conversely, if the system information received by the first relay node from the cell does not include the first indication information, and the first relay node determines that the cell does not prohibit the first relay node from accessing, then the first relay node can definitely access the first network device. In this case, the first network device cannot control the access of the first relay node.

[0010] In conjunction with the first aspect, in some implementations of the first aspect, the second indication information is cellBarred information or cellBarredNTN information.

[0011] Based on the above technical solution, if the first relay node receives system information from the cell that does not include the first indication information, the first relay node can also determine whether the cell prohibits the first relay node from accessing based on the cellBarred information or cellBarredNTN information. Therefore, network devices that do not send the first indication information can control the access of relay nodes by sending cellBarred information or cellBarredNTN information.

[0012] In conjunction with the first aspect, in some implementations of the first aspect, the second indication information is cellBarredNTN information, wherein the first relay node uses a non-terrestrial network NTN access method.

[0013] Based on the above technical solution, when the first relay node uses the NTN access method, it can determine whether the cell prohibits its access based on the cellBarredNTN information. Therefore, network devices that do not send the first indication information can control the relay node's access by sending cellBarredNTN information.

[0014] In conjunction with the first aspect, in some implementations of the first aspect, the second indication information is cellBarred information, wherein the first relay node uses a non-NTN access method, or the first relay node does not have NTN access capability.

[0015] Based on the above technical solution, when the first relay node uses a non-NTN access method, or when the first relay node lacks NTN access capability, the first relay node can determine whether the cell prohibits its access based on the cellBarred information. Therefore, network devices that do not send the first indication information can control the relay node's access by sending cellBarred information.

[0016] In conjunction with the first aspect, in some implementations of the first aspect, the system information is system information block 1SIB1.

[0017] Secondly, a communication method is provided. This method can be applied to a first relay node; that is, the method can be executed by the first relay node itself, or by its constituent components (such as a chip, chip system, circuit, communication module, or processor). This application does not limit the scope of the method. The following description primarily uses the first relay node as an example.

[0018] The first relay node has NTN access capability. The method may include: determining the access method of the first relay node, wherein the access method includes NTN access or non-NTN access; if the access method of the first relay node is NTN access, the method further includes: receiving cellBarredNTN information; determining whether the cell prohibits the first relay node from accessing based on the cellBarredNTN information; or, if the access method of the first relay node is non-NTN access, the method further includes: receiving system information of the cell; if the system information includes first indication information, the method further includes: determining whether the cell prohibits the first relay node from accessing based on the first indication information, wherein the first indication information indicates whether the cell prohibits the relay node from accessing, or the first indication information indicates that the cell is a cell of the second relay node.

[0019] Based on the above technical solution, when the first relay node uses NTN access, it does not need to check the first indication information. Instead, it receives the cellBarredNTN information and determines whether the cell prohibits its access based on this information, thus reducing its processing overhead. Considering that the first relay node attempts to access the first network device using NTN access, and that the first network device is not a wireless access and backhaul mobile terminal next generation NodeB (WAB-gNB) under NTN access, it will not send the first indication information. Therefore, the first relay node does not need to check for the existence of the first indication information and can directly determine whether the cell prohibits its access through the cellBarredNTN information. Furthermore, network devices other than WAB-gNB can thus control the relay node's access.

[0020] In addition, when the access method of the first relay node is a non-NTN access method, the first relay node can check whether the system information includes the first indication information, and if the system information includes the first indication information, determine whether the cell prohibits the first relay node from accessing through the first indication information.

[0021] In conjunction with the second aspect, in some implementations of the second aspect, where the system information does not include the first indication information, the method further includes: receiving cellBarred information; and determining, based on the cellBarred information, whether the cell prohibits the first relay node from accessing.

[0022] Based on the above technical solution, when the access method of the first relay node is a non-NTN access method, the first relay node can check whether the system information includes the first indication information. If the system information does not include the first indication information, it receives the cellBarred information and determines whether the cell prohibits the first relay node from accessing. Based on this, network devices that do not send the first indication information can also achieve access control of the relay node.

[0023] In conjunction with the second aspect, in some implementations of the second aspect, the system information is SIB1.

[0024] Thirdly, a communication method is provided. This method can be applied to a first relay node; that is, the method can be executed by the first relay node itself, or by its constituent components (such as a chip, chip system, circuit, communication module, or processor). This application does not limit the scope of the method. The following description primarily uses the first relay node as an example.

[0025] The method may include: sending third indication information, the third indication information being a new wireless network measurement result list (MeasResultList2NR) and / or terminal device assistance information (UEAssistanceInformation), the third indication information including first information indicating that the first relay node is a wireless access backhaul mobile terminal (WAB-MT).

[0026] Based on the above technical solution, the first relay node can carry first information in the MeasResultList2NR information and / or UEAssistanceInformation, indicating that the first relay node is acting as a WAB-MT. In the WAB-MT handover scenario, the source station can disregard the MeasResultList2NR information and UEAssistanceInformation, or in other words, the source station can be unaware that the device to be handed over is a relay node, and directly transmit the first information to the target station. Thus, the target station can determine that the node being handed over is a WAB-MT, preventing the WAB-MT from handing over from the source station to a target station that does not allow WAB-MT access.

[0027] Fourthly, a communication method is provided. This method can be applied to a first network device; that is, the method can be executed by the first network device or by components of the first network device (such as a chip, chip system, circuit, communication module, or processor). This application does not limit this. The following description mainly uses a first network device as an example.

[0028] The method may include: sending system information of a cell to a first relay node, wherein the system information does not include first indication information, wherein the first indication information indicates whether the cell prohibits the relay node from accessing, or the first indication information indicates that the cell is a cell of a second relay node; sending second indication information to the first relay node, wherein the second indication information is used by the first relay node to determine whether the cell prohibits the first relay node from accessing.

[0029] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the second indication information is cellBarred information or cellBarredNTN information.

[0030] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the second indication information is cellBarredNTN information, wherein the first relay node uses a non-terrestrial network NTN access method.

[0031] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the second indication information is cellBarred information, wherein the first relay node uses a non-NTN access method, or the first relay node does not have NTN access capability.

[0032] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the system information is SIB1.

[0033] For the beneficial effects and possible designs of the fourth aspect, please refer to the relevant description in the first aspect, which will not be repeated here.

[0034] Fifthly, a communication method is provided. This method can be applied to a first network device; that is, the method can be executed by the first network device itself, or by components of the first network device (such as a chip, chip system, circuit, communication module, or processor). This application does not limit the scope of the method. The following description primarily uses a first network device as an example.

[0035] The method may include: sending fourth indication information to a first relay node, the first relay node having NTN access capability, the fourth indication information being used to determine the access method of the first relay node, the access method including NTN access method or non-NTN access method; if the access method of the first relay node is NTN access method, the method further includes: sending cellBarredNTN information, the cellBarredNTN information being used to determine whether the cell prohibits the first relay node from accessing; or, if the access method of the first relay node is non-NTN access method, the method further includes: sending system information of the cell; wherein the system information includes first indication information, the first indication information being used to determine whether the cell prohibits the first relay node from accessing, wherein the first indication information indicates whether the cell prohibits the relay node from accessing, or the first indication information indicates that the cell is a cell of a second relay node; or, if the system information does not include the first indication information, the method further includes: sending cellBarred information, the cellBarred information being used to determine whether the cell prohibits the first relay node from accessing.

[0036] In conjunction with the fifth aspect, in some implementations of the fifth aspect, the system information is SIB1.

[0037] For the beneficial effects and possible designs of the fifth aspect, please refer to the relevant description in the second aspect, which will not be repeated here.

[0038] Sixthly, a communication method is provided. This method can be applied to a second network device; that is, the method can be executed by the second network device or by components of the second network device (such as a chip, chip system, circuit, communication module, or processor). This application does not limit this. The following description mainly uses a second network device as an example.

[0039] The method may include: receiving a handover request, the handover request including MeasResultList2NR information and / or UEAssistanceInformation, the MeasResultList2NR information and / or UEAssistanceInformation including first information, the first information indicating that the node to be handed over is WAB-MT.

[0040] In conjunction with the sixth aspect, in some implementations of the sixth aspect, the method may further include: sending a fifth indication message, the fifth indication message indicating that the handover preparation has failed.

[0041] For the beneficial effects and possible designs of the sixth aspect, please refer to the relevant description in the third aspect, which will not be repeated here.

[0042] In a seventh aspect, a communication apparatus is provided for performing the methods of any one of the first to sixth aspects and any possible implementation thereof. Specifically, the apparatus may include units and / or modules for performing the methods of any one of the first to sixth aspects and any possible implementation thereof, such as processing units and / or communication units.

[0043] In one implementation, the device is a communication device (such as a terminal device or a network device). When the device is a communication device, the communication unit can be a transceiver or an input / output interface; the processing unit can be at least one processor. Optionally, the transceiver can be a transceiver circuit. Optionally, the input / output interface can be an input / output circuit.

[0044] In another implementation, the device is a chip, chip system, circuit, or communication module for communication equipment (such as terminal equipment or network equipment). When the device is a chip, chip system, or circuit for communication equipment, the communication unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit; the processing unit may be at least one processor, processing circuit, or logic circuit.

[0045] Eighthly, a communication device is provided, the device comprising: at least one processor configured to cause the device to perform any one of the first to sixth aspects and any possible implementation thereof.

[0046] Optionally, the at least one processor is configured to execute computer programs or instructions to perform any of the first to sixth aspects described above and any possible implementation thereof.

[0047] Optionally, the device further includes a memory for storing the computer program or instructions.

[0048] Optionally, the at least one processor is coupled to a memory for storing the computer program or instructions. The memory may be located externally to the device.

[0049] Optionally, the device also includes a communication interface through which the processor reads instructions from memory. This can be understood as the communication interface being coupled to the processor and used to input computer programs or instructions to the processor, or to output information from the processor.

[0050] Unless otherwise specified, or if the transmission and acquisition / reception operations involved do not contradict their actual function or internal logic in the relevant description, they can be understood as output, input, or other operations, or as transmission and reception operations performed by radio frequency circuits and antennas. This application does not limit them in this regard.

[0051] In one implementation, the device is a communication device (such as a terminal device or a network device).

[0052] In another implementation, the device is a chip, chip system, circuit, or communication module for communication equipment (such as terminal equipment or network equipment). Optionally, the chip is a modem chip, also known as a baseband chip, or a system-on-chip (SoC) chip containing a modem core or a system-in-package (SIP) chip.

[0053] A ninth aspect provides a computer-readable storage medium storing a computer program (e.g., program code) or instructions that, when executed on a communication device, cause the communication device to perform any of the first to sixth aspects and any possible implementation thereof.

[0054] In a tenth aspect, a computer program product comprising instructions is provided, which, when run on a computer, causes the computer to perform any of the first to sixth aspects and any possible implementation thereof.

[0055] Eleventhly, a communication system is provided, including a first communication device and a second communication device. The first communication device is used to execute the method provided in any one of the implementations of the first to third aspects, and the second communication device is used to execute the method provided in any one of the implementations of the fourth to sixth aspects. Attached Figure Description

[0056] Figure 1 is a schematic diagram of a vehicle-mounted mobile relay scenario.

[0057] Figure 2 is a schematic diagram of the WAB architecture 200 according to an embodiment of this application.

[0058] Figure 3 is a schematic diagram of an NTN backhaul architecture applicable to an embodiment of this application.

[0059] Figure 4 is a schematic diagram of another NTN backhaul architecture applicable to embodiments of this application.

[0060] Figure 5 is a schematic diagram of the ORAN architecture 500 according to an embodiment of this application.

[0061] Figure 6 is a schematic diagram of a communication method 600 provided in an embodiment of this application.

[0062] Figure 7 is a flowchart of a first relay node behavior 700 provided in an embodiment of this application.

[0063] Figure 8 is a schematic diagram of another communication method 800 provided in an embodiment of this application.

[0064] Figure 9 is a flowchart of another first relay node behavior 900 provided in an embodiment of this application.

[0065] Figure 10 is a schematic diagram of another communication method 1000 provided in an embodiment of this application.

[0066] Figure 11 is a schematic diagram of a communication device 1100 provided in an embodiment of this application.

[0067] Figure 12 is a schematic diagram of another communication device 1200 provided in an embodiment of this application.

[0068] Figure 13 is a schematic diagram of a chip system 1300 provided in an embodiment of this application. Detailed Implementation

[0069] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0070] Before introducing the scheme of this application, the following points should be noted.

[0071] (1) In this application, "instruction" can include direct instruction, indirect instruction, explicit instruction, implicit instruction, etc. When describing an instruction information as indicating A, it can be understood that the instruction information carries A, carries the identifier of A, carries B which is associated with A, carries the identifier of B which is associated with A, etc. In other words, if the receiving side of an instruction information can determine A based on the instruction information, it can be described as the instruction information indicating A, and the specific method of determination is not limited. When it is understood that the instruction information carries A, "instruction" can be replaced with "includes". In this case, a statement such as "send / receive instruction information, the instruction information indicates A" can be replaced with "send / receive A".

[0072] In this application, the information indicated by the instruction information is called the information to be instructed. In specific implementations, there are many ways to indicate the information to be instructed, such as, but not limited to, directly indicating the information to be instructed, such as the information to be instructed itself or its index. It can also indirectly indicate the information to be instructed by indicating other information, where there is a relationship between the other information and the information to be instructed. It can also indicate only a part of the information to be instructed, while the other parts are known or pre-agreed upon. For example, the instruction of specific information can be achieved by using a pre-agreed (e.g., protocol-defined) arrangement of various pieces of information, thereby reducing instruction overhead to some extent. Furthermore, the information to be instructed can be sent as a whole or divided into multiple sub-information pieces, and the sending period and / or timing of these sub-information pieces can be the same or different.

[0073] (2) In this application, the expression " / " is used to indicate that the objects before and after are in an "or" relationship; for example, A / B can mean: A or B. The expression "and / or" is used to indicate that the objects before and after are in a relationship of either "and" or "or"; for example, A and / or B can mean the following: A exists alone, B exists alone, A and B exist simultaneously, where A and B can be single or multiple. "At least one of the following" or similar expressions are used to indicate any combination of the listed items; for example, at least one of A, B and / or C can mean the following: A exists alone, B exists alone, C exists alone, A and B exist simultaneously, B and C exist simultaneously, A and C exist simultaneously, A, B and C exist simultaneously, where A, B, and C can be single or multiple.

[0074] (3) In this application, "send" and "receive" indicate the direction of signal transmission. For example, "send information to XX" can be understood as the destination of the information being XX, which may include direct transmission via the air interface or indirect transmission by other units or modules via the air interface. "Receive information from YY" can be understood as the source of the information being YY, which may include direct reception from YY via the air interface or indirect reception from YY by other units or modules via the air interface. "Send" can also be understood as the "output" of the chip interface, and "receive" can also be understood as the "input" of the chip interface. In other words, sending and receiving can occur between devices, such as between network devices and terminal devices, or within a device, such as between components, modules, chips, software modules, or hardware modules within the device via a bus, wiring, or interface.

[0075] (4) In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terms and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0076] (5) In this application, "first," "second," and "#1," "#2," and "#A" are merely for descriptive convenience and are used to distinguish objects, and are not intended to limit the scope of the embodiments of this application. They are not used to describe the order or sequence of features. It should be understood that such described objects can be interchanged where appropriate in order to describe solutions other than those in the embodiments of this application.

[0077] (6) In this application, "predefined" can mean a standard protocol predefined, or it can mean a pre-agreed or pre-negotiated agreement between devices. Here, "protocol" can refer to a standard protocol in the field of communications, for example, it may include fourth-generation (4G) protocols. th Generation 4G network, fifth generation (5G) network th This application does not limit the scope to network protocols such as generation (5G), new radio (NR) protocols, 5.5G network protocols, future communication network protocols, and related protocols applied in future communication systems.

[0078] (7) In this application, the words “exemplary,” “for example,” etc., are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as an “example” in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the word “example” is intended to present the concept in a concrete manner. In the embodiments of this application, “of,” “corresponding, relevant,” and “corresponding” may sometimes be used interchangeably, and it should be noted that their intended meanings are consistent unless their distinction is emphasized.

[0079] First, let me introduce the communication system to which this application applies.

[0080] The technical solutions provided in this application can be applied to various communication systems, such as 5th generation (5G) or new radio (NR) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, and LTE time division duplex (TDD) systems. The technical solutions provided in this application can also be applied to future communication systems, such as future mobile communication networks. The technical solutions provided in this application can also be applied to device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), and Internet of Things (IoT) communication systems. The technical solutions provided in this application can also be applied to non-terrestrial network (NTN) systems such as inter-satellite communication and satellite communication.

[0081] As an example, a satellite communication system includes a satellite base station and terminal equipment. The satellite base station provides communication services to the terminal equipment. Satellite base stations can also communicate with each other. A satellite can act as a base station or as a terminal device. Here, "satellite" can refer to drones, hot air balloons, low-Earth orbit satellites, medium-Earth orbit satellites, high-Earth orbit satellites, etc. "Satellite" can also refer to non-terrestrial base stations or non-terrestrial equipment.

[0082] As an example, V2X communication can include: vehicle-to-vehicle (V2V) communication, vehicle-to-infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication, and vehicle-to-network (V2N) communication.

[0083] In a communication system, a device can send signals to or receive signals from another device. These signals can include information, signaling, or data. The device can also be replaced by an entity, network entity, communication equipment, communication module, node, communication node, etc. This application uses a device as an example for description.

[0084] The terminal device in this application embodiment can be a device or module that accesses the aforementioned communication system and has corresponding communication functions. The terminal device can include various devices with wireless communication capabilities, which can be used to connect people, objects, machines, etc. The terminal device can be widely applied in various scenarios, such as: cellular communication, D2D, V2X, peer-to-peer (P2P), M2M, MTC, IoT, virtual reality (VR), augmented reality (AR), industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, drones, robots, remote sensing, passive sensing, positioning, navigation and tracking, autonomous delivery, etc. The terminal device can be a terminal in any of the above scenarios, such as an MTC terminal, an IoT terminal, etc. Terminal equipment can be user equipment (UE), terminal, fixed equipment, mobile station equipment or mobile equipment, subscriber unit, handheld device, vehicle-mounted equipment, wearable device, cellular phone, smartphone, session initiation protocol (SIP) phone, wireless data card, personal digital assistant (PDA), computer, tablet computer, laptop computer, wireless modem, handset, laptop computer, computer with wireless transceiver capability, smart book, vehicle, satellite, global positioning system (GPS) device, target tracking device, aircraft (e.g., drone, helicopter, multiple helicopters, four helicopters, or airplanes), ship, remote control device, smart home device, industrial equipment, transportation vehicle with wireless communication capability, communication module, or roadside unit with terminal function, all conforming to the 3rd generation partnership project (3GPP) standard. The device may be a wireless communication unit (RSU), or a device built into the aforementioned device (e.g., a communication module, modem, or chip in the aforementioned device), or other processing devices connected to the wireless modem.

[0085] It should be understood that in certain scenarios, a UE can also be used as a base station. For example, a UE can act as a scheduling entity, providing sidelink signaling between UEs in scenarios such as V2X, D2D, or P2P.

[0086] In this embodiment, the device for implementing the functions of a terminal device, i.e., the terminal device, can be the terminal device itself, or it can be any device capable of supporting the terminal device in implementing the functions, such as a chip system, chip, circuit, or communication module (i.e., a communication module that performs communication functions). This device can be installed in the terminal device. In this embodiment, the chip system can be composed of chips, or it can include chips and other discrete devices. Furthermore, the device can also be configured with program instructions for performing corresponding communication functions.

[0087] The network device in this application embodiment can be a device or module with corresponding communication functions. The network device can be a device used to communicate with terminal devices; it can also be called an access network device or a wireless access network device, such as a base station. In this application embodiment, the network device can refer to a radio access network (RAN) node (or device) that connects the terminal device to the wireless network. A base station can broadly encompass, or be replaced by, various names including: NodeB, evolved NodeB (eNB), next-generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitter, master station, auxiliary station, multiple standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, micro base station, relay node, donor node, or similar, or a combination thereof. A base station can also refer to a communication module, modem, or chip installed within the aforementioned equipment or apparatus. A base station can also be a mobile switching center, a device that performs base station functions in D2D, V2X, and M2M communications, a network-side device in future communication networks, or a device that performs base station functions in future communication systems. A base station can support networks using the same or different access technologies. The embodiments of this application do not limit the specific technologies or device forms used in the network equipment.

[0088] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move depending on the location of the mobile base station. In other examples, a helicopter or drone can be configured as a device to communicate with another base station.

[0089] In some deployments, the network devices mentioned in the embodiments of this application may be devices including CU, or DU, or devices including CU and DU, or devices with control plane CU nodes (central unit-control plane (CU-CP)) and user plane CU nodes (central unit-user plane (CU-UP)) and DU nodes.

[0090] In some deployments, multiple RAN nodes collaborate to assist terminal devices in achieving wireless access, with different RAN nodes each implementing some of the base station's functions. For example, RAN nodes can be CUs, DUs, CU-CPs, CU-UPs, or radio units (RUs). CUs and DUs can be configured separately or included in the same network element, such as a BBU. RUs can be included in radio equipment or radio units, such as RRUs, AAUs, or RRHs.

[0091] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, a radio access network can also be an open radio access network (O-RAN) architecture. In an O-RAN system, CU can also be called an open CU (open CU, O-CU), DU can also be called an open DU (open DU, O-DU), CU-CP can also be called an open CU-CP (O-CU-CP), CU-UP can also be called an open CU-UP (O-CU-UP), and RU can also be called an open RU (open RU, O-RU). Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software modules and hardware modules.

[0092] In this embodiment, the device for implementing the functions of a network device can be a network device itself, or a device capable of supporting the network device in implementing those functions, such as a chip system, chip, circuit, or communication module (i.e., a communication module that performs communication functions). This device can be installed within the network device. In this embodiment, the chip system can be composed of chips, or it can include chips and other discrete devices. Furthermore, the device can be configured with program instructions for performing corresponding communication functions. This embodiment only uses a network device as an example to illustrate the device for implementing the functions of a network device, and does not limit the solution of this embodiment.

[0093] Network devices and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and satellites. This application does not limit the scenario in which the network devices and terminal devices are located.

[0094] The communication system applicable to the embodiments of this application is briefly described below with reference to Figures 1 to 5.

[0095] Referring to Figure 1, as an example, Figure 1 is a schematic diagram of a vehicle-mounted mobile relay scenario.

[0096] In the 3GPP topology enhancement project, a new architecture based on wireless access and backhaul (WAB) is being studied. As shown in Figure 1, the application scenario of the WAB architecture can be vehicle-mounted relay (VMR), where relay nodes are deployed on vehicles (or even airplanes) to provide wireless coverage for terminals inside the vehicle, overcoming the problem of poor wireless signal in vehicles. Relay nodes access macro base stations (also known as backhaul next-generation NodeBs (BH gNBs) or backhaul radio access network nodes (BH-RAN-NODEs) via wireless backhaul. The BH-RAN-NODE can be a host gNB supporting WAB access, used to transmit WAB-MT service data. The relay nodes in the WAB architecture can be called WAB nodes.

[0097] Referring to Figure 2, which is a schematic diagram of a WAB architecture 200 according to an embodiment of this application, as an example, the WAB architecture 200 includes: a terminal device (such as a UE), a WAB node, and a macro station (such as a BH-RAN-NODE). Optionally, the WAB architecture may also include a non-macro station (such as an other-gNB).

[0098] A WAB node can include gNB (gap-connected network) functionality and mobile terminal (MT) functionality. The WAB-gNB provides access services to the UE (UE), while the WAB-MT provides backhaul. The MT can be understood as a special type of UE. The UE can access the WAB-gNB via its Uu interface. The WAB-MT then encapsulates the UE's data within its Protocol Data Unit (PDU) session. This data is transmitted through the MT's Uu interface, via the gNB connected to the MT (e.g., BH-RAN-NODE), and finally to the MT's User Plane Function (UPF) (e.g., BH UPF). The BH UPF then removes the MT-related header information, exposing the UE-related header information, and routes it to the UE's UPF according to Internet Protocol (IP) routing. Logically, a PDU session is also established between the UE and its UPF, but this transmission is encapsulated within the MT's PDU session.

[0099] In the WAB, UE data is directly embedded in the MT's PDU session. During MT backhaul, this data can be considered the MT's own user plane data. After this data reaches the BH-RAN-NODE via the MT's data radio bearer (DRB), the BH-RAN-NODE only sees the MT's data, not the UE's data. Only after it is sent to the MT's UPF will the MT-related header information be removed, revealing the UE-related header information, and then forwarded to the UE's UPF. The above example illustrates how the UE transmits user plane data with the UPF. The control plane transmission between the WAB-gNB and the AMF is similar; the data is also wrapped in the MT's PDU session and forwarded by the MT's UPF to the WAB-gNB's AMF via IP routing.

[0100] In addition, WAB-gNB can also establish logical Xn interfaces with BH-RAN-NODE and nearby base stations (e.g., other gNBs). The data transmission method on the Xn interface (taking WAB-gNB sending data to BH-RAN-NODE as an example) is that WAB-gNB first sends the data to MT's UPF through MT's PDU session, and then MT's UPF forwards the data to BH-RAN-NODE through IP routing.

[0101] The WAB node's network entry process involves the MT (Mobile Targeting Unit) first entering the network as a UE. After authentication, a radio resource control (RRC) connection and PDU session are established. Then, the gNB (Gateway Node) is activated, establishing NG and Xn interfaces through the MT's PDU session. As the first step in the WAB node's network entry process, the MT's entry is the same as that of a regular UE. After the MT powers on, it searches for SSBs (Social Subsystems), camps on a suitable cell, and then initiates random access.

[0102] Considering emergency scenarios, WAB-MT can support backhaul based on NTN, meaning that the standard needs to support WAB-MT access to NTN cells.

[0103] Referring to Figure 3, as an example, Figure 3 is a schematic diagram of an NTN backhaul architecture applicable to an embodiment of this application. In Figure 3, the satellite can operate in transparent mode. Transparent means that the satellite only performs transparent forwarding without protocol stack processing. In transparent mode, the satellite provides Uu air interface transmission to the MT, and then connects to the ground gateway station via a microwave link, which in turn connects to the ground BH-RAN-NODE base station. For the MT, this can be understood as establishing a logical Uu interface with the BH-RAN-NODE through the satellite and the gateway station.

[0104] Referring to Figure 4, as an example, Figure 4 is a schematic diagram of another NTN backhaul architecture applicable to embodiments of this application. In Figure 4, the satellite operates in regenerative mode. Here, regeneration can refer to the satellite having protocol stack processing capabilities, requiring processing of received messages to generate new messages for transmission. In regenerative mode, the BH-RAN-NODE is deployed on the satellite, establishing a Uu interface connection with the ground MT, and then backhauling to the ground gateway station via a microwave link. Afterwards, it connects the MT's AMF and UPF via IP routing. The gateway station acts as an IP forwarder. Logically, the N3 and N2 interfaces are still established between the BH-RAN-NODE and the MT UPF and MT AMF.

[0105] In this embodiment of the application, the WAB architecture 200 can be applied to the ORAN architecture.

[0106] Referring to Figure 5, as an example, Figure 5 is a schematic diagram of the ORAN architecture 500 according to an embodiment of this application. As shown in Figure 5, the ORAN architecture 500 includes: a RAN intelligent controller (RIC), a BH-RAN-NODE (including BH-RAN-NODE-CU and BH-RAN-NODE-DU), and WAB nodes (including WAB-MT, WAB-CU, and WAB-DU).

[0107] In the ORAN architecture 500, the RIC is used to collect network information and perform necessary optimization tasks. It can interact with CUs (such as BH-RAN-NODE-CU and WAB-CU) and DUs (such as BH-RAN-NODE-DU and WAB-DU) via the E2 interface. WAB-CU and WAB-DU can constitute a WAB-gNB. The RIC can directly control the DU, or the RIC can control the DU through the CU. BH-RAN-NODE-CU interacts with BH-RAN-NODE-DU through the F1 interface, and BH-RAN-NODE-DU interacts with WAB-MT through the Uu interface. The RIC can send E2 messages to either WAB-CU or WAB-DU. The E2 interface is also a logical interface, implemented similarly to the Xn interface, and can also be implemented through the MT's PDU session. The RIC communicates with the MT through the MT's UPF, thereby exchanging E2 information with the WAB-gNB.

[0108] To facilitate understanding of the embodiments of this application, the terminology used in this application will be briefly explained. Furthermore, for ease of description, the terminal device will be described below using a terminal or UE as an example.

[0109] 1. UE access control.

[0110] After the UE detects the SSB, it can parse the master information block (MIB) message in the SSB. The MIB message includes cellBarred information elements, which may take the values ​​{barred, notbarred}. The MIB also contains scheduling information of system information block 1 (SIB1).

[0111] As an example, in Case 1, the UE is a special UE, or the UE uses a special access method. Case 1 may include at least one of the following: a UE using an NTN access link, a UE using an air-to-ground (ATG) access link, a UE supporting cell energy saving, a UE with reduced capability (redcapUE), a 2RXXR UE, or a relay node MT (e.g., an integrated access and backhaul mobile terminal (IAB-MT), or a mobile IAB-MT, or a network controlled repeater mobile terminal (NCR-MT)).

[0112] In addition to scenario 1 above, the UE needs to check the cellBarred information element in the MIB. If cellBarred = barred, the UE considers the cell not allowed to camp and performs cell reselection. If cellBarred = notbarred, the UE receives SIB1 according to the SIB1 scheduling information in the MIB. After receiving SIB1, the UE further checks other information in SIB1. For example, the UE can check whether the UE supports the cell's radio frequency parameters, or whether the cell is a private network cell, etc. If the conditions are not met (e.g., the UE does not support the cell's radio frequency parameters, or the cell is a private network cell and the UE is not a user of that private network), the UE still considers the cell not allowed to camp and performs cell reselection.

[0113] For UEs in scenario 1 above, they can skip checking the `cellBarred` information cell in the MIB and directly receive SIB1 based on the SIB1 scheduling information in the MIB. SIB1 includes bar indication information specifically for UEs or access methods in scenario 1, replacing `cellBarred` in the MIB. For example, for UEs using NTN access, `cellBarredNTN` (cellBarredNTN) is introduced in SIB1, with possible values ​​of {barred, notbarred}. NTN UEs can skip checking `cellBarred` in the MIB and use `cellBarredNTN` in SIB1 as the standard. If the UE is also a redcap UE while accessing NTN, it also checks the redcap-related bar indication information. When both the NTN and redcap bar indications indicate "notbarred," the UE can access the cell.

[0114] Specifically, the MTs of the aforementioned relay nodes do not support NTN / ATG access methods, nor do they support cell energy saving, redcap, or XR services. The information used to indicate whether a relay node's MT is allowed access is either IAB support (iab-support), mobile iab-support, or ncr-support. This information can be a 1-bit indication. Taking IAB as an example, if iab-support is carried in SIB1, the cell allows the IAB-MT to camp; otherwise, it does not, and the IAB-MT performs cell reselection. The same applies to Mobile IAB-MT and NCR-MT.

[0115] One possible implementation is that in a WAB architecture, the MT (Medium-Terminal) needs to select a cell to camp on after power-on. WABs generally do not support multi-hop, meaning one WAB-MT does not connect to another WAB-gNB. This is because the data of the UE served by the WAB-gNB is packaged in the WAB-MT's PDU session. If multi-hop were supported, it would lead to nested tunnels, repeatedly adding headers, resulting in bloated data packets and data detours on the core network side, reducing transmission efficiency. Therefore, it is necessary to implement access control for WAB-MTs.

[0116] As an example, a cell that does not support WAB-MT access (e.g., a cell under a WAB-gNB) broadcasts a WAB-barred cell. When the indication is "barred," the MT does not camp there; when the indication is "not barred" or the cell does not exist, the MT can camp there. Therefore, WAB-MTs can camp on older base stations (base stations prior to R19, hereinafter referred to as older base stations). These base stations do not recognize WAB-MTs and do not broadcast WAB-barred cells, allowing WAB-MTs to access these older base stations, which is beneficial for the widespread deployment of WAB nodes. Furthermore, the WAB-barred cell can also be represented by a Radio Access Backhaul (WAB-cell indication). Cells under a WAB-gNB broadcast a WAB-cell indication, indicating that they are WAB cells. Upon receiving this indication, the WAB-MT can determine whether to access the cell based on its presence. For cells that do not broadcast WAB-cell indications, the WAB-MT can allow access.

[0117] In access control schemes based on WAB-barred or WAB-cell indications, WAB-MT determines whether to allow camping according to the WAB-barred or WAB-cell indication. When WAB-barred / WAB-cell indications do not exist (e.g., for older base stations), WAB-MT considers the cell to be accessible. While this is beneficial for WAB deployment, it also allows MT to access all older base stations, making it impossible for older base stations to control WAB-MT access, thus affecting the use of older base stations.

[0118] Furthermore, during handover, the MT does not acknowledge any bar indication information broadcast by the system; access control is handled by the target station. If the WAB-MT accesses an older base station, and the older base station does not recognize the WAB-MT, during the WAB-MT handover, the older base station, as the source base station, does not carry any indication information about the WAB-MT. This will prevent the target base station from determining that the node being handed over is a WAB-MT, potentially causing the WAB-MT to handover from the older base station to a target base station that does not allow WAB-MT access (e.g., another WAB-gNB).

[0119] In view of this, this application proposes that when the system information of the cell received by WAB-MT does not include WAB-barred or WAB-cell indication, WAB-MT can determine whether the cell is prohibited from access through other indication information, so that old base stations can also perform access control on WAB-MT.

[0120] The methods provided by the embodiments of this application will be described in detail below with reference to the accompanying drawings. The embodiments provided by this application can be applied to the scenarios shown in the above figures, and are not limited thereto.

[0121] Referring to Figure 6, as an example, Figure 6 is a schematic diagram of a communication method 600 provided in an embodiment of this application. For ease of description, a first relay node and a first network device are used as examples for illustrative purposes. The first relay node can replace components of the first relay node (e.g., a chip, chip system, circuit, communication module, or processor), and the first network device can replace components of the first network device (e.g., a chip, chip system, circuit, communication module, or processor). Furthermore, the steps described below as being performed by a single execution entity can also be divided into steps performed by multiple execution entities, which can be logically and / or physically separated. The method 600 shown in Figure 6 may include the following steps.

[0122] S610, the first relay node receives the cell's system information. Correspondingly, the first network device sends the cell's system information to the first relay node.

[0123] As an example, the first relay node can be a node comprising a mobile terminal portion (or a first portion, first module, or first function) and an access network portion (or a second portion, second module, or second function). The mobile terminal portion can be used to implement the relay node as a terminal device, and the access network node portion can be used to implement the relay node as an access network device. In this embodiment, the first relay node can also be called a WAB node, mobile WAB node, or simply the first node, etc. The name does not limit the scope of protection of this embodiment, as long as it can achieve the corresponding function. For example, when method 600 is applied to the WAB architecture shown in Figure 2, the first relay node can be the WAB node in Figure 2.

[0124] As an example, the first relay node in this embodiment can be further understood as the mobile terminal portion of the first relay node. For example, the first relay node is WAB-MT.

[0125] As an example, the explanation of the first network device can be found in the specific description of network devices above. For example, the first network device could be a RAN node, a NodeB, or a gNB, etc.

[0126] As an example, the first network device can be a base station prior to Rel-19. The first network device can also be referred to as an older version base station, or simply an old base station, etc. The name does not limit the scope of protection of this application embodiment; it is sufficient that it performs the corresponding functions. For example, the first network device is not a WAB-gNB.

[0127] As an example, in method 600, a cell can be understood as an area within the wireless signal coverage range of the first network device, or the cell corresponding to the first network device, or the cell managed by the first network device, etc. This application embodiment does not limit this.

[0128] As an example, system information can be used to indicate the parameter configuration of the first network device, such as SSB location or power. System information can also be understood as the system information corresponding to the first network device, which the first relay node can use to access the first network device. For example, system information may include, but is not limited to, MIB and / or SIB1.

[0129] As an example, in the embodiments of this application, "access" can also be replaced with "residence" or similar terms, and the name does not limit the scope of protection of the embodiments of this application.

[0130] As one possible implementation, in method 600, the system information is SIB1.

[0131] As an example, the first network device can send system information via broadcast. Sending cell system information to the first relay node can also be replaced by the first network device broadcasting the cell system information. More specifically, the first network device broadcasts the MIB, or broadcasts SIB1, etc. The first relay node receiving the cell system information can be replaced by the first relay node receiving the cell system information broadcast by the first network device. More specifically, the first relay node receives the MIB broadcast by the first network device, or receives SIB1, etc., broadcast by the first network device. This application does not limit this aspect.

[0132] S620, if the system information does not include the first indication information, the first relay node receives the second indication information. Accordingly, the first network device sends the second indication information to the first relay node.

[0133] It should be understood that, in the embodiments of this application, the first network device is not limited to sending the second indication information only when the system information does not include the first indication information.

[0134] As an example, the first indication information indicates whether the cell prohibits the relay node from accessing, or the first indication information indicates that the cell is a cell with a second relay node.

[0135] In the above example, the first indication information can be WAB-barred information, which indicates whether the cell prohibits relay node access. WAB-barred information can also be referred to as WAB-barred cell, etc.; whether the cell prohibits relay node access can also be replaced with whether the cell allows relay node access, or whether the cell prohibits or does not prohibit relay node access, or whether the cell does not allow or allows relay node access, etc., and this application embodiment does not limit this.

[0136] It should be understood that the explanation of WAB-barred can be found in the preceding text, and the embodiments of this application will not be repeated here.

[0137] In the above example, the first indication information can be WAB-cell indication information, which indicates that the cell is the cell of the second relay node. The WAB-cell indication information can also be called WAB-cell indication information element, etc., and this embodiment of the application does not limit it.

[0138] As an example, the second relay node can be a node that includes both a mobile terminal portion and an access network portion. In the embodiments of this application, the second relay node can also be called a WAB node, a mobile WAB node, or a second node, etc. The name does not limit the scope of protection of the embodiments of this application, as long as it can achieve the corresponding function.

[0139] As an example, the second relay node in this embodiment can be further understood as the access network portion of the second relay node. For example, the second relay node is a WAB-gNB.

[0140] It should be understood that the explanation of WAB-cell indication can be found in the preceding text, and will not be repeated here in the embodiments of this application.

[0141] In this embodiment, if the system information received by the first relay node does not include the first indication information, the first relay node can also receive the second indication information and determine whether the cell prohibits the first relay node from accessing based on the second indication information. For example, for a first network device that sends system information to the cell that does not include the first indication information, the first network device can also implement access control for the first relay node through the second indication information. Based on this, a network device that does not send the first indication information can implement access control for the relay node.

[0142] Conversely, if the system information received by the first relay node from the cell does not include the first indication information, and the first relay node determines that the cell does not prohibit the first relay node from accessing, then the first relay node can definitely access the first network device. In this case, the first network device cannot control the access of the first relay node.

[0143] The second indication information is used to determine whether the cell prohibits the first relay node from accessing. Specifically, the second indication information can be cellBarred information or cellBarredNTN information.

[0144] As an example, whether the cell prohibits the first relay node from accessing can be replaced with whether the cell allows the first relay node to accessing, or whether the cell prohibits or does not prohibit the first relay node from accessing, etc. This application embodiment does not limit it.

[0145] In this embodiment, if the system information received by the first relay node from the cell does not include the first indication information, the first relay node can also determine whether the cell prohibits the first relay node from accessing based on the cellBarred information or cellBarredNTN information. Therefore, network devices that do not send the first indication information can control the access of relay nodes by sending cellBarred information or cellBarredNTN information.

[0146] As an example, the system information does not include the first indication information, which could mean that the system information does not include WAB-barred information or WAB-cell indication information. Or more specifically, the MIB does not include WAB-barred information or WAB-cell indication information, or in other words, SIB1 does not include WAB-barred information or WAB-cell indication information, etc., and this application embodiment does not limit it.

[0147] Optionally, prior to S620, method 600 may further include step #A: the first relay node determines whether the system information includes first indication information. Whether or not the first indication information is included can also be referred to as whether or not the first indication information is carried, etc., and this embodiment of the application does not limit the terminology.

[0148] It should be noted that method 600 mainly describes the case where the system information does not include the first indication information. The system information may also include the first indication information, and the specific situation can be referred to in S740 below. This embodiment of the application will not be elaborated here.

[0149] As an example, the first network device can send the second indication information via broadcast. Sending the second indication information to the first relay node can also be replaced by the first network device broadcasting the second indication information. More specifically, the first network device can broadcast cellBarred information or cellBarredNTN information, etc. Receiving the second indication information can be replaced by the first relay node receiving the second indication information broadcast by the first network device. More specifically, the first relay node can receive the cellBarred information or cellBarredNTN information broadcast by the first network device, etc. This application does not limit this aspect.

[0150] Optionally, method 600 further includes step #B: the first relay node receives fourth indication information. Accordingly, the first network device sends the fourth indication information to the first relay node. The fourth indication information is used to determine the access method of the first relay node. The access method may include NTN access or non-NTN access.

[0151] As an example, the fourth indication information may include the currently accessed frequency band number, where NTN uses a dedicated band number.

[0152] Further optionally, method 600 also includes step #C: the first relay node can determine whether to use NTN access mode based on the band number.

[0153] The following examples, 1 and 2, illustrate the cases where the second indication information is cellBarredNTN and cellBarred, respectively.

[0154] Example 1: The second indication information is cellBarredNTN information, where the first relay node uses NTN access method.

[0155] Optionally, the first relay node has NTN access capability. The first relay node using NTN access can also be understood as the first relay node determining that it is currently using NTN access. This application does not limit the scope of the embodiments.

[0156] As an example, the cellBarredNTN information is broadcast in SIB1, or the cellBarredNTN information belongs to SIB1, or the cellBarredNTN information is information in SIB1, etc., and this application embodiment does not limit it.

[0157] As an example, when the first relay node uses the NTN access method, the first relay node determines whether the cell prohibits the first relay node from accessing based on the indication of cellBarredNTN.

[0158] For example, when cellBarredNTN = barred, it can be assumed that the cell prohibits the first relay node from accessing, or in other words, the cell does not allow the first relay node to access. Furthermore, the first relay node can perform cell reselection; when cellBarredNTN = not barred, it can be assumed that the cell does not prohibit the first relay node from accessing, or in other words, the cell allows the first relay node to access.

[0159] In this embodiment, when the first relay node uses the NTN access method, the first relay node can determine whether the cell prohibits its access based on the cellBarredNTN information. Therefore, network devices that do not send the first indication information can control the relay node's access by sending the cellBarredNTN information.

[0160] Example 2: The second indication information is cellBarred information, where the first relay node uses a non-NTN access method, or the first relay node does not have NTN access capability.

[0161] Optionally, the first relay node does not have NTN access capability, which can also be referred to as the first relay node not being able to perform NTN access, etc., and this application embodiment does not limit it.

[0162] Furthermore, when the first relay node does not have NTN access capability, the first relay node uses a non-NTN access method, or in other words, the first relay node does not use NTN access.

[0163] It should be noted that if the first relay node does not have NTN access capability, the first relay node does not need to perform the above steps #B and #C, and the first relay node uses a non-NTN access method.

[0164] Optionally, the first relay node has NTN access capability. The first relay node using a non-NTN access method can also be understood as the first relay node determining that it is not currently using NTN access. This application does not impose limitations on the embodiments described.

[0165] As an example, the cellBarred information is broadcast in the MIB, or the cellBarred information belongs to the MIB, or the cellBarred information is information in the MIB, etc., and this application embodiment does not limit it.

[0166] As an example, if the first relay node uses a non-NTN access method, or if the first relay node does not have NTN access capability, the first relay node shall determine whether the cell prohibits the first relay node from accessing the cell based on the indication of cellBarred.

[0167] For example, when cellBarred = barred, it can be assumed that the cell prohibits the first relay node from accessing, or in other words, the cell does not allow the first relay node to access. Furthermore, the first relay node can perform cell reselection; when cellBarred = not barred, it can be assumed that the cell does not prohibit the first relay node from accessing, or in other words, the cell allows the first relay node to access.

[0168] In this embodiment, when the first relay node uses a non-NTN access method, or when the first relay node lacks NTN access capability, the first relay node can determine whether the cell prohibits its access based on the cellBarred information. Therefore, network devices that do not send the first indication information can control the relay node's access by sending cellBarred information.

[0169] The behavior of the first relay node will be further explained below by referring to Figures 6 and 7.

[0170] Referring to Figure 7, as an example, Figure 7 is a flowchart of a first relay node behavior 700 provided in an embodiment of this application. The behavior 700 shown in Figure 7 may include the following steps.

[0171] S710, the first relay node receives the MIB.

[0172] As an example, after receiving the MIB, the first relay node can save the information in the MIB. This information may include cellBarred information.

[0173] S720, the first relay node receives SIB1.

[0174] As an example, after S710, the first relay node can directly receive SIB1. That is to say, the first relay node does not directly determine whether the cell prohibits the first relay node from accessing based on the cellBarred information. In other words, between S710 and S720, the first relay node does not determine whether the cell prohibits the first relay node from accessing based on the cellBarred information.

[0175] It should be noted that the explanation of the first relay node receiving MIB or SIB1 can be found in the content of S610 above, and will not be repeated here in the embodiments of this application.

[0176] S730, the first relay node determines whether the first indication information exists.

[0177] As an example, the first relay node determines whether SIB1 includes first indication information. This first indication information can be WAB-barred information, or WAB-cell indication information, etc.

[0178] It should be understood that the embodiments of this application do not limit the first indication information to be included only in SIB1. For example, the first indication information may be included in MIB, and the first relay node determines whether the MIB includes the first indication information; or, the first indication information may be included in other system information. The embodiments of this application do not limit this.

[0179] It should also be understood that the description of the first instruction information can be referred to the relevant content in S620 above, and S730 can be combined with step #A described above. The embodiments of this application will not be repeated here.

[0180] S740, when the first indication information exists, the first relay node determines whether the cell prohibits the first relay node from accessing based on the first indication information.

[0181] As an example, the existence of the first indication information can be further understood as the first relay node determining that SIB1 includes the first indication information, or the first relay node determining that MIB includes the first indication information, or the first relay node determining that other system information includes the first indication information, etc.

[0182] Specifically, when the first indication information exists, the first relay node determines whether access to the cell is permitted based on the first indication information. In other words, the first relay node can choose not to check or ignore other bar indications. For example, other bar indications could be cellBarred information or cellBarredNTN information, etc.

[0183] The following examples, 3 to 5, illustrate the behavior of the first relay node under different first instruction information.

[0184] Example 3: The first indication information indicates whether the cell prohibits relay node access.

[0185] As an example, in Example 3, the first relay node determines whether to allow access to the current cell based on the first indication information. The first indication information can be WAB-Barred information. For a detailed explanation of WAB-Barred information, please refer to the preceding text; it will not be repeated here in this embodiment.

[0186] For example, if the first indication message indicates that relay node access is prohibited, such as when WAB-Barred = barred, the first relay node considers the current cell to be off-limits to access. Therefore, the first relay node will not access the current cell and can perform cell reselection.

[0187] For another example, the first indication message indicates that relay node access is not prohibited. For instance, when WAB-Barred = not barred, the first relay node considers the current cell to allow access. Consequently, the first relay node camps on the current cell and can subsequently initiate random access.

[0188] Example 4: The first indication information indicates that the cell is the cell of the second relay node.

[0189] As an example, in Example 4, the first relay node believes that access to the current cell is prohibited. The first indication information can be WAB-cell indication information. For a detailed explanation of the WAB-cell indication information and the second relay node, please refer to the preceding text; this embodiment will not repeat it here.

[0190] Furthermore, the first relay node can perform cell reselection.

[0191] Example 5: The first indication information includes information #B and information #C. Information #B indicates whether the cell prohibits relay node access, and information #C indicates that the cell is a cell with a second relay node.

[0192] As an example, in Example 5, the first relay node uses information #B to determine whether access to the current cell is allowed. Information #B can be WAB-Barred information, and information #C can be WAB-cell indication information. This can also be understood as meaning that in Example 5, information #C is not used for access control by the first relay node; for example, information #C could be used for cell reselection by the vehicle-mounted UE.

[0193] S750, when the first indication information is not available, the first relay node determines whether to use the NTN access method.

[0194] It should be understood that for a detailed description of S750, please refer to the content of steps #B and #C in method 600 above, and the embodiments of this application will not be repeated here.

[0195] S760: When the first relay node uses NTN access mode, the first relay node determines whether the cell prohibits the first relay node from accessing based on cellBarredNTN.

[0196] It should be understood that for a detailed description of S760, please refer to the content of Example 1 in Method 600 above, and the embodiments of this application will not be repeated here.

[0197] S770: When the first relay node does not use the NTN access method, the first relay node determines whether the cell prohibits the first relay node from accessing based on cellBarred.

[0198] It should be understood that for a detailed description of S770, please refer to Example 2 in Method 600 above, and the embodiments of this application will not be repeated here.

[0199] Referring to Figure 8, as an example, Figure 8 is a schematic diagram of another communication method 800 provided in an embodiment of this application. For ease of description, the following description uses a first relay node and a first network device as examples. The method 800 shown in Figure 8 may include the following steps.

[0200] S810, the first relay node determines its access method. The access method can include NTN access or non-NTN access.

[0201] As an example, the description of the first relay node and the first network device can be found in the relevant content of method 600, and will not be repeated here in the embodiments of this application.

[0202] As an example, in method 800, the first relay node does not access the WAB cell, or in other words, if the first network device is a WAB-gNB, the first relay node does not access the first network device.

[0203] As an example, in method 800, the first relay node has NTN access capability.

[0204] It should be understood that for determining the access method of the first relay node, please refer to the relevant content of steps #B and #C in method 600 above, which will not be repeated here in the embodiments of this application.

[0205] The following sections, using scenarios 1 and 2, illustrate the access control methods for the first relay node when it uses different access methods.

[0206] Scenario 1: The first relay node uses NTN access. In this case, method 800 may also include the following steps.

[0207] S820, the first relay node receives the cellBarredNTN information. Correspondingly, the first network device sends the cellBarredNTN information.

[0208] It should be understood that, in the embodiments of this application, the first network device is not limited to sending the second indication information only when the access method of the first relay node is NTN access method.

[0209] It should also be understood that the description of cellBarredNTN information can be found in the preceding text, and will not be repeated here in the embodiments of this application.

[0210] S830: The first relay node determines whether the cell prohibits the first relay node from accessing based on the cellBarredNTN information.

[0211] As an example, when the first relay node uses NTN access mode, the first network device is not WAB-gNB.

[0212] Specifically, for the regenerable satellite architecture, the NTN base station is not a WAB-gNB; for the transparent satellite architecture, the WAB-gNB is deployed on the vehicle to serve the vehicle UE and does not provide coverage through the NTN.

[0213] Furthermore, when the first relay node uses NTN access, it determines whether access to a cell is permitted based on the cellBarredNTN information. In other words, the first relay node directly determines whether access to a cell is permitted based on the cellBarredNTN information. That is, the first relay node can choose not to check or ignore the aforementioned first indication information.

[0214] It should be understood that for details regarding whether the first relay node should prohibit access to the cell based on the cellBarredNTN information, please refer to the relevant content in Example 1 above. This application embodiment will not repeat the details here.

[0215] In this embodiment, when the first relay node uses NTN access, it does not need to check the first indication information. Instead, it receives the cellBarredNTN information and determines whether the cell prohibits its access based on this information, thus reducing its processing overhead. Considering that the first relay node attempts to access the first network device using NTN access, and that the first network device is not a wireless access and backhaul mobile terminal next generation NodeB (WAB-gNB) under NTN access, it will not send the first indication information. Therefore, the first relay node does not need to check for the existence of the first indication information and can directly determine whether the cell prohibits its access through the cellBarredNTN information. Furthermore, network devices other than WAB-gNB can thus control the relay node's access.

[0216] Scenario 2: The first relay node uses a non-NTN access method. In this case, method 800 may also include the following steps.

[0217] S840, the first relay node receives the cell's system information. Correspondingly, the first network device sends the cell's system information to the first relay node.

[0218] As one possible implementation, in method 800, the system information is SIB1.

[0219] It should be understood that for a detailed description of S840, please refer to the relevant content in the S610 section above, and the embodiments of this application will not be repeated here.

[0220] The following sections, through sub-scenario 1 and sub-scenario 2, respectively, describe the access control method for the first relay node under scenario 2, depending on whether the system information includes or excludes the first indication information.

[0221] Sub-scenario 1: The system information includes the first indication information. In this case, method 800 may also include the following steps.

[0222] S850, the first relay node determines whether the cell prohibits the first relay node from accessing based on the first indication information, wherein the first indication information indicates whether the cell prohibits the relay node from accessing, or the first indication information indicates that the cell is the cell of the second relay node.

[0223] It should be understood that for a detailed description of S850, please refer to the relevant content in the S740 section above, and the embodiments of this application will not be repeated here.

[0224] In this embodiment of the application, when the access method of the first relay node is a non-NTN access method, the first relay node can check whether the system information includes the first indication information, and when the system information includes the first indication information, determine whether the cell prohibits the first relay node from accessing through the first indication information.

[0225] Sub-scenario 2: The system information does not include the first indication information. In this case, method 800 may also include the following steps.

[0226] As an example, prior to S810, method 800 further includes: a first relay node receiving a MIB. Correspondingly, a first network device sends a MIB. The MIB may include cellBarred information.

[0227] Furthermore, the first relay node can store the cellBarred information in the MIB.

[0228] S860: The first relay node determines whether the cell prohibits the first relay node from accessing based on the cellBarred information.

[0229] It should be understood that for details regarding cellBarred information and the first relay node's determination of whether the cell prohibits the first relay node from accessing based on cellBarred information, please refer to the relevant content in Example 2 above. This application's embodiment will not repeat the details here.

[0230] In this embodiment, when the first relay node's access method is a non-NTN access method, the first relay node can check whether the system information includes the first indication information. If the system information does not include the first indication information, it receives the cellBarred information and determines whether the cell prohibits the first relay node from accessing. Based on this, network devices that do not send the first indication information can also perform access control on the relay node.

[0231] The behavior of the first relay node will be further explained below by referring to Figures 8 and 9.

[0232] Referring to Figure 9, as an example, Figure 9 is a flowchart of another first relay node behavior 900 provided in an embodiment of this application. Behavior 900 shown in Figure 9 may include the following steps.

[0233] S910, the first relay node receives the MIB.

[0234] As an example, after receiving the MIB, the first relay node can save the information in the MIB. This information may include cellBarred information.

[0235] S920, the first relay node receives SIB1.

[0236] It should be understood that for a detailed explanation of S920, please refer to the relevant content in the S710 section above. The embodiments of this application will not be repeated here.

[0237] S930, the first relay node determines whether to use NTN access method.

[0238] It should be understood that for a detailed description of S930, please refer to the content of steps #B and #C in method 600 above, and the embodiments of this application will not be repeated here.

[0239] S940, when the first relay node uses NTN access mode, the first relay node determines whether the cell prohibits the first relay node from accessing based on cellBarredNTN.

[0240] It should be understood that for a detailed description of S940, please refer to the relevant content of Example 1 in Method 600 above, and the embodiments of this application will not be repeated here.

[0241] S950, when the first relay node does not use the NTN access method, the first relay node determines whether the first indication information exists.

[0242] It should be understood that for specific instructions on determining whether the first indication information exists, please refer to the relevant content of S730 above, and this application embodiment will not repeat it here.

[0243] S960, when the first indication information exists, the first relay node determines whether the cell prohibits the first relay node from accessing based on the first indication information.

[0244] It should be understood that for a detailed description of S960, please refer to the relevant content of S740 above, and the embodiments of this application will not be repeated here.

[0245] S970, when the first indication information is not available, the first relay node determines whether the cell prohibits the first relay node from accessing based on cellBarred.

[0246] It should be understood that for details regarding whether the first relay node should prohibit access to the cell based on cellBarred, please refer to the relevant content in Example 2 above. This application embodiment will not repeat the details here.

[0247] Referring to Figure 10, as an example, Figure 10 is a schematic diagram of another communication method 1000 provided in an embodiment of this application. For ease of description, the following description uses a first relay node, a first network device, and a second network device as examples. The method 1000 shown in Figure 10 may include the following steps.

[0248] S1010, the first relay node sends a third indication message. Correspondingly, the first network device receives the third indication message.

[0249] It should be understood that the description of the first relay node and the first network device in method 1000 can be referred to the description of method 600 above, and will not be repeated here in the embodiments of this application.

[0250] As an example, method 1000 can be a handover scenario for the first relay node, and the first network device can be the source station (source BH-gNB) for handover.

[0251] As an example, the third indication information sent by the first relay node can be sent by the WAB-MT portion of the first relay node.

[0252] As an example, the explanation of the second network device can be found in the specific description of network devices above. For example, the second network device could be a RAN node, a NodeB, or a gNB, etc.

[0253] Furthermore, as an example, the second network device could be the target station (target BH-gNB) for the handover.

[0254] As an example, the third indication information may be the new wireless network measurement result list MeasResultList2NR information and / or the terminal equipment assistance information UEAssistanceInformation, which is carried in the RRC message.

[0255] The third indication information may include the first information, which indicates that the first relay node is a wireless access backhaul mobile terminal (WAB-MT), or in other words, the first information indicates that the terminal device sending the third indication information is a WAB-MT.

[0256] As an example, the first information may also be called the relay node indication information, or WAB indication information, or WAB-MT indication information, etc., and its name does not limit the scope of protection of the embodiments of this application.

[0257] As an example, the third indication information includes the first information, which can also be understood as the first relay node carrying the first information in the third indication information. This application embodiment does not limit this.

[0258] As an example, the first information can indicate that the first relay node is a WAB-MT by its presence in the third indication information, or the first information can indicate that the first relay node is a WAB-MT by its value being a first value, etc. This application does not limit this.

[0259] S1020, the first network device sends a handover request. Correspondingly, the second network device receives the handover request.

[0260] As an example, a handover request sent by the first network device to the second network device may carry the RRC content (context) of the first relay node, which may include the content of the Handover Preparation Information cell.

[0261] The following examples, using method 1 and method 2, illustrate the request switching methods when the third instruction information is different.

[0262] Method 1, the third instruction information is MeasResultList2NR.

[0263] As an example, the HandoverPreparationInformation cell may include a Radio Resource Management Configuration (RRM-config) cell, which may include the measurement results of the first relay node. Specifically, the RRM-config may directly reference MeasResultList2NR.

[0264] As an example, after receiving the MeasResultList2NR sent by the first relay node, the first network device can not only select the target cell based on the measurement results, but also copy the measurement results and put them directly into the RRM-config information element, and further put them into the HandoverPreparationInformation information element.

[0265] Specifically, the first network device may not recognize MeasResultList2NR, but directly carry MeasResultList2NR into the HandoverPreparationInformation information element, and further carry the HandoverPreparationInformation information element in the handover request to the second network device, so that the second network device can select the target beam.

[0266] Furthermore, in Method 1, the first network device carries the first information in MeasResultList2NR. If the first network device is the old base station mentioned above, even though the first network device does not recognize the first information, the first information can still be carried in the handover request and sent to the second network device.

[0267] As an example, the second network device determines, based on the first information, that the device to be handed over is WAB-MT. When the cell of the second network device does not support WAB-MT access (e.g., the second network device is WAB-gNB), method 1000 may further include:

[0268] S1030, the second network device sends a fifth indication message. Correspondingly, the first network device receives this fifth indication message. The fifth indication message indicates that handover preparation has failed.

[0269] Furthermore, after receiving the fifth instruction information, the first network device can reselect the target cell.

[0270] Method 2, the third indication information is UEAssistanceInformation.

[0271] As an example, the HandoverPreparationInformation cell may include an Access Layer Context Information (AS-context) cell, which may reference the UEAssistanceInformation cell, which is reported by the first relay node to the first network device.

[0272] As an example, the first relay node carries the first information in the UEAssistanceInformation, and the first network device carries the UEAssistanceInformation in the AS-context and further carries it in the HandoverPreparationInformation cell.

[0273] Specifically, the first network device may not recognize UEAssistanceInformation, but directly carry UEAssistanceInformation in the HandoverPreparationInformation information element, and further carry the HandoverPreparationInformation information element in the handover request and send it to the second network device.

[0274] Furthermore, in Method 2, the first network device carries the first information in the UEAssistanceInformation. If the first network device is the old base station mentioned above, even though the first network device does not recognize the first information, the first information can still be carried in the handover request and sent to the second network device.

[0275] As an example, the second network device determines, based on the first information, that the device to be handed over is WAB-MT. When the cell of the second network device does not support WAB-MT access (e.g., the second network device is WAB-gNB), method 1000 may further include:

[0276] S1030, the second network device sends a fifth indication message. Correspondingly, the first network device receives this fifth indication message. The fifth indication message indicates that the handover preparation has failed.

[0277] Furthermore, after receiving the fifth instruction information, the first network device can reselect the target cell.

[0278] It should be noted that methods 1 and 2 described above can be combined, and this application does not limit the specific combinations.

[0279] In this embodiment, the first relay node may carry first information in the MeasResultList2NR information and / or UEAssistanceInformation, indicating that the first relay node is acting as a WAB-MT. In a WAB-MT handover scenario, the source station may not recognize the MeasResultList2NR information and UEAssistanceInformation; in other words, the source station may not perceive that the device to be handed over is a relay node, but directly transmits the first information to the target station. This allows the target station to determine that the node being handed over is a WAB-MT, preventing the WAB-MT from handing over from the source station to a target station that does not allow WAB-MT access.

[0280] The methods provided by the embodiments of this application have been described in detail above with reference to Figures 6 to 10. The apparatus provided by the embodiments of this application will be described in detail below with reference to Figures 11 to 13. It should be understood that the descriptions of the apparatus embodiments correspond to the descriptions of the method embodiments; therefore, any content not described in detail can be referred to the method embodiments above, and for the sake of brevity, will not be repeated here.

[0281] Referring to Figure 11, as an example, Figure 11 is a schematic diagram of a communication device 1100 provided in an embodiment of this application. The communication device 1100 includes a transceiver unit 1110 and a processing unit 1120. The transceiver unit 1110 can be used to implement corresponding communication functions. The transceiver unit 1110 can also be referred to as a communication interface or a communication unit. The processing unit 1120 can be used to perform processing, such as determining information bits.

[0282] Optionally, the device 1100 may further include a storage unit, which can be used to store instructions and / or data, and the processing unit 1120 can read the instructions and / or data in the storage unit to enable the device to implement the aforementioned method embodiments.

[0283] In a first possible design, the device 1100 can be the terminal device in the aforementioned embodiments. The device 1100 can implement the steps or processes executed by the first relay node in the above method embodiments. Specifically, the transceiver unit 1110 can be used to perform transceiver-related operations (such as sending and / or receiving data or messages) of the first relay node in the above method embodiments, and the processing unit 1120 can be used to perform processing-related operations of the first relay node in the above method embodiments, or operations other than transceiver (such as operations other than sending and / or receiving data or messages).

[0284] In one possible implementation, the transceiver unit 1110 is used to receive system information of the cell; if the system information does not include the first indication information, the transceiver unit 1110 is also used to receive the second indication information, the second indication information being used to determine whether the cell prohibits the first relay node from accessing, wherein the first indication information indicates whether the cell prohibits the relay node from accessing, or the first indication information indicates that the cell is the cell of the second relay node.

[0285] In a second possible design, the device 1100 can be the first network device in the aforementioned embodiments. This device 1100 can implement the steps or processes performed by the first network device corresponding to those described in the method embodiments above. Specifically, the transceiver unit 1110 can be used to perform transceiver-related operations (such as sending and / or receiving data or messages) of the first network device in the method embodiments above, and the processing unit 1120 can be used to perform processing-related operations of the first network device in the method embodiments above, or operations other than transceiver operations (such as operations other than sending and / or receiving data or messages).

[0286] In one possible implementation, the transceiver unit 1110 is used to send system information of the cell to the first relay node. The system information does not include first indication information, wherein the first indication information indicates whether the cell prohibits the relay node from accessing, or the first indication information indicates that the cell is the cell of the second relay node. The transceiver unit 1110 is also used to send second indication information to the first relay node. The second indication information is used by the first relay node to determine whether the cell prohibits the first relay node from accessing.

[0287] In a third possible design, the device 1100 can be the second network device in the foregoing embodiments. This device 1100 can implement the steps or processes performed by the second network device corresponding to those described in the above method embodiments. Specifically, the transceiver unit 1110 can be used to perform transceiver-related operations (such as sending and / or receiving data or messages) of the second network device in the above method embodiments, and the processing unit 1120 can be used to perform processing-related operations of the second network device in the above method embodiments, or operations other than transceiver (such as operations other than sending and / or receiving data or messages).

[0288] One possible implementation is that the transceiver unit 1110 is used to receive a handover request, which includes MeasResultList2NR information and / or UEAssistanceInformation. The MeasResultList2NR information and / or UEAssistanceInformation include first information indicating that the node to be handed over is WAB-MT.

[0289] It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above method embodiments, and will not be repeated here for the sake of brevity.

[0290] It should also be understood that the device 1100 here is embodied in the form of a functional unit. The term "unit" here can refer to an application-specific integrated circuit (ASIC), electronic circuitry, a processor (e.g., a shared processor, a proprietary processor, or a group processor, etc.) and memory for executing one or more software or firmware programs, integrated logic circuitry, and / or other suitable components supporting the described functions. In an alternative example, those skilled in the art will understand that the device 1100 can be specifically the communication device in the above embodiments, and can be used to execute the various processes and / or steps corresponding to the communication device in the above method embodiments; to avoid repetition, these will not be described again here.

[0291] The apparatus 1100 of each of the above-described schemes has the function of implementing the corresponding steps performed by the communication device (such as a terminal or a network device) in the above-described methods. The function can be implemented in hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions; for example, the transceiver unit can be replaced by a transceiver (e.g., the transmitting unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as processing units, can be replaced by a processor, each performing the transceiver operations and related processing operations in the respective method embodiments.

[0292] In addition, the transceiver unit 1110 described above can also be a transceiver circuit (for example, it may include a receiving circuit and a transmitting circuit), and the processing unit can be a processing circuit.

[0293] It should be noted that the device in Figure 11 can be the communication device (such as a terminal or network device) in the aforementioned embodiments, or it can be a chip or a chip system, such as a system on a chip (SoC). The transceiver unit can be an input / output circuit or a communication interface; the processing unit is a processor, microprocessor, or integrated circuit integrated on the chip. No limitations are imposed here.

[0294] Referring to Figure 12, as an example, Figure 12 is a schematic diagram of another communication device 1200 provided in an embodiment of this application. The device 1200 includes a processor 1210, which is coupled to a memory 1220. The memory 1220 is used to store computer programs or instructions and / or data. The processor 1210 is used to execute the computer programs or instructions stored in the memory 1220, or to read the data stored in the memory 1220, in order to execute the methods in the above method embodiments.

[0295] Optionally, there may be one or more processors 1210.

[0296] Optionally, the memory 1220 may be one or more.

[0297] Alternatively, the memory 1220 can be integrated with the processor 1210, or it can be set separately.

[0298] Optionally, as shown in FIG12, the device 1200 further includes a transceiver 1230 for receiving and / or transmitting signals. For example, the processor 1210 is used to control the transceiver 1230 to receive and / or transmit signals.

[0299] As an example, processor 1210 may have the functions of processing unit 1120 shown in FIG11, memory 1220 may have the functions of storage unit, and transceiver 1230 may have the functions of transceiver unit 1110 shown in FIG11.

[0300] As one option, the device 1200 is used to implement the operations performed by a communication device (such as a terminal or a network device) in the various method embodiments described above.

[0301] For example, processor 1210 is used to execute computer programs or instructions stored in memory 1220 to implement the relevant operations of the communication device in the various method embodiments described above.

[0302] It should be understood that the processor mentioned in the embodiments of this application can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0303] It should also be understood that the memory mentioned in the embodiments of this application can be volatile memory and / or non-volatile memory. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM). For example, RAM can be used as an external cache. By way of example and not limitation, RAM includes the following forms: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0304] 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) can be integrated into the processor.

[0305] It should also be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0306] Referring to Figure 13, as an example, Figure 13 is a schematic diagram of a chip system 1300 provided in an embodiment of this application. The chip system 1300 (or may also be referred to as a processing system) includes logic circuitry 1310 and an input / output interface 1320.

[0307] The logic circuit 1310 can be a processing circuit in the chip system 1300. The logic circuit 1310 can be coupled to a memory unit, calling instructions from the memory unit, enabling the chip system 1300 to implement the methods and functions of the embodiments of this application. The input / output interface 1320 can be an input / output circuit in the chip system 1300, outputting processed information from the chip system 1300, or inputting data or signaling information to be processed into the chip system 1300 for processing.

[0308] As one approach, the chip system 1300 is used to implement operations performed by a communication device (such as a terminal or a network device) in the various method embodiments described above.

[0309] For example, logic circuit 1310 is used to implement processing-related operations performed by a communication device (such as a terminal, or a network device) in the above method embodiments; input / output interface 1320 is used to implement sending and / or receiving-related operations performed by a communication device (such as a terminal, or a network device) in the above method embodiments.

[0310] This application also provides a computer-readable storage medium storing a computer program or instructions for implementing the methods executed by a communication device (such as a terminal or a network device) in the above-described method embodiments. For example, when the computer program or instructions are run on the communication device, the communication device (such as a terminal or a network device) executes the above-described methods (such as method 600, method 800, or method 1000).

[0311] This application also provides a computer program product comprising instructions that, when executed by a computer, implement the methods performed by a communication device (such as a terminal or a network device) in the above-described method embodiments. For example, when the computer program or instructions are run on the communication device, the communication device (such as a terminal or a network device) performs the above-described methods (such as method 600, method 800, or method 1000).

[0312] This application also provides a communication system that includes the terminal and / or network device described in the embodiments above. For example, the system includes the terminal and network device described in the embodiments of FIG6, FIG8, or FIG10.

[0313] The explanations and beneficial effects of the relevant contents in any of the devices provided above can be found in the corresponding method embodiments provided above, and will not be repeated here.

[0314] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of apparatus or units may be electrical, mechanical, or other forms.

[0315] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. For example, the computer can be a personal computer, a server, or a network device, etc. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks, SSDs). For example, the aforementioned available media include, but are not limited to, USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks, and other media capable of storing program code.

[0316] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

A communication method, characterized in that, Applied to the first relay node, the method includes: Receive system information from the cell; If the system information does not include the first indication information, a second indication information is received. The second indication information is used to determine whether the cell prohibits the first relay node from accessing. The first indication information indicates whether the cell prohibits the relay node from accessing, or the first indication information indicates that the cell is the cell of the second relay node. The method according to claim 1, characterized in that, The second indication information is either cellBarred information or cellBarredNTN information. The method according to claim 1 or 2, characterized in that, The second indication information is cellBarredNTN information, wherein the first relay node uses a non-terrestrial network NTN access method. The method according to claim 1 or 2, characterized in that, The second indication information is cellBarred information, wherein the first relay node uses a non-NTN access method, or the first relay node does not have NTN access capability. The method according to any one of claims 1 to 4, characterized in that, The system information is System Information Block 1SIB1. A communication method, characterized in that, Applied to a first relay node, which has NTN access capability, the method includes: Determine the access method of the first relay node, wherein the access method includes NTN access method or non-NTN access method; When the first relay node uses NTN access, the method further includes: Receive cellBarredNTN information; Based on the cellBarredNTN information, determine whether the cell prohibits the first relay node from accessing; or... When the access method of the first relay node is a non-NTN access method, the method further includes: Receive system information from the cell; If the system information includes first indication information, the method further includes: The first indication information determines whether the cell prohibits the first relay node from accessing, wherein the first indication information indicates whether the cell prohibits the relay node from accessing, or the first indication information indicates that the cell is a cell with a second relay node. The method according to claim 6, characterized in that, If the system information does not include the first indication information, the method further includes: Receive cellBarred information; Based on the cellBarred information, determine whether the cell prohibits the first relay node from accessing. The method according to claim 6 or 7, characterized in that, The system information is SIB1. A communication method, characterized in that, Applied to the first relay node, the method includes: Send a third indication message, which is a new wireless network measurement result list (MeasResultList2NR) and / or terminal device assistance information (UEAssistanceInformation). The third indication message includes first information, which indicates that the first relay node is a wireless access backhaul mobile terminal (WAB-MT). A communication method, characterized in that, include: A handover request is received, the handover request including MeasResultList2NR information and / or UEAssistanceInformation, the MeasResultList2NR information and / or UEAssistanceInformation including first information, the first information indicating that the node to be handed over is WAB-MT. The method according to claim 10, characterized in that, Also includes: A fifth indication message is sent, indicating that the handover preparation has failed. A communication method, characterized in that, Applied to a first network device, the method includes: Send the cell's system information to the first relay node. The system information does not include first indication information, wherein the first indication information indicates whether the cell prohibits the relay node from accessing, or the first indication information indicates that the cell is the cell of the second relay node. A second indication message is sent to the first relay node, the second indication message being used by the first relay node to determine whether the cell prohibits the first relay node from accessing. The method according to claim 12, characterized in that, The second indication information is either cellBarred information or cellBarredNTN information. The method according to claim 12 or 13 is characterized in that, The second indication information is cellBarredNTN information, wherein the first relay node uses a non-terrestrial network NTN access method. The method according to claim 12 or 13 is characterized in that, The second indication information is cellBarred information, wherein the first relay node uses a non-NTN access method, or the first relay node does not have NTN access capability. The method according to any one of claims 12 to 15, characterized in that, The system information is System Information Block 1SIB1. A communication method, characterized in that, Applied to a first network device, the method includes: A fourth indication message is sent to the first relay node, which has non-terrestrial network (NTN) access capability. The fourth indication message is used to determine the access method of the first relay node, which includes NTN access method or non-NTN access method. When the first relay node's access method is NTN access, the method further includes: sending cellBarredNTN information, wherein the cellBarredNTN information is used to determine whether the cell prohibits the first relay node from accessing; or, When the access method of the first relay node is a non-NTN access method, the method further includes: sending system information of the cell; wherein the system information includes first indication information, the first indication information being used to determine whether the cell prohibits the first relay node from accessing, wherein the first indication information indicates whether the cell prohibits the relay node from accessing, or the first indication information indicates that the cell is a cell of the second relay node; or, the system information does not include the first indication information, the method further includes: sending cellBarred information, the cellBarred information being used to determine whether the cell prohibits the first relay node from accessing. The method according to claim 17, characterized in that, The system information is System Information Block 1SIB1. A communication device, characterized in that, It includes modules or units for performing the method of any one of claims 1 to 9; or, it includes modules or units for performing the method of any one of claims 10 to 11; or, it includes modules or units for performing the method of any one of claims 12 to 16; or, it includes modules or units for performing the method of claim 17 or 18. A communication device, characterized in that, The device includes a processor configured to cause the communication device to perform the method of any one of claims 1 to 9, or to cause the communication device to perform the method of any one of claims 10 to 11, or to cause the communication device to perform the method of any one of claims 12 to 16, or to cause the communication device to perform the method of claim 17 or 18. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program or instructions that, when executed on a communication device, cause the communication device to perform the method as described in any one of claims 1 to 9, or cause the communication device to perform the method as described in any one of claims 10 to 11, or cause the communication device to perform the method as described in any one of claims 12 to 16, or cause the communication device to perform the method as described in claim 17 or 18. A computer program product, characterized in that, The computer program product includes a computer program or instructions that, when executed on a communication device, cause the communication device to perform the method as described in any one of claims 1 to 9, or cause the communication device to perform the method as described in any one of claims 10 to 11, or cause the communication device to perform the method as described in any one of claims 12 to 16, or cause the communication device to perform the method as described in claim 17 or 18.

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