Communication method and related apparatus

Abstract

The present application discloses a communication method and a related apparatus. The method comprises: a terminal device acquires first information, the first information comprising the signal quality of a wireless link between the terminal device and a network device, and / or the signal quality of a beam between the terminal device and the network device; the terminal device receives second information from the network device, the second information being related to the power margin of the network device; and the terminal device performs beam failure monitoring and recovery and / or wireless link monitoring and recovery on the basis of the first information and the second information. When the terminal device detects and recovers the beam and / or wireless link, the power margin of the network device is taken into account, so as to avoid the terminal device executing reconstruction or beam switching in advance when the network device still has the power margin, thereby reducing the network energy consumption and reducing the energy consumption loss.

Description

A communication method and related device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on January 9, 2024, with application number 202410033278.2 and application name “A communication method and related device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to a communication method and related devices. Background Art

[0003] As networks continue to expand, network energy consumption continues to increase. During communications between terminal devices and network devices, beam failure or radio link failure may occur. To address this, the terminal device can monitor the beam and / or radio link based on signal measurement results. However, in scenarios where the transmit power of network devices can be dynamically adjusted, if the network device is not transmitting at full power, monitoring the beam and / or radio link directly based on the signal measurement results may result in unnecessary connection reestablishment or recovery processes, increasing network energy consumption. Summary of the Invention

[0004] The present application provides a communication method and related devices, which can reduce network energy consumption.

[0005] In a first aspect, the present application provides a communication method, which is executed by a terminal device, or by some components in the terminal device (such as a processor, chip, or chip system), or the terminal device can be a logic module or software that can implement all or part of the functions of the communication device. In this method, the terminal device obtains first information, which includes the signal quality of the wireless link between the terminal device and the network device, and / or the signal quality of the beam between the terminal device and the network device; the terminal device receives second information from the network device, which is related to the power headroom of the network device; and the terminal device performs beam failure monitoring and recovery, and / or wireless link monitoring and recovery based on the first information and the second information.

[0006] Based on the above technical solution, when the terminal device detects and recovers the beam and / or wireless link, the power margin of the network device is taken into consideration to avoid the terminal device performing reconstruction or beam switching in advance when the network device still has power margin, thereby reducing network energy consumption and energy loss.

[0007] Optionally, the signal quality of the wireless link between the terminal device and the network device and / or the signal quality of the beam can be obtained based on a reference signal.

[0008] For example, when a terminal device and a network device communicate via a downlink, the reference signal may include one or more of the following: a channel state information reference signal (CSI-RS), a secondary synchronization signal (SSS), a primary synchronization signal (PSS), a cell specific reference signal (CRS), a demodulation reference signal (DMRS), and a synchronization system / physical broadcast channel block (SS / PBCH block). The SS / PBCH block may be referred to as a synchronization signal block (SSB).

[0009] For example, when the terminal device and the network device communicate through the side link, the reference signal may include a sidelink synchronization signal / physical broadcast channel block (sidelink synchronization signal / physical broadcast channel block, sidelink SSB, SL-SSB, or S-SS / PSBCH block), a sidelink channel state information reference signal (sidelink channel state information reference signal, SL-CSI-RS), etc.

[0010] Optionally, the second information indicates a range of the power headroom and / or whether the power headroom exists.

[0011] In a possible implementation of the first aspect, the terminal device performs radio link monitoring and recovery according to the first information and the second information, including:

[0012] When the first condition is met, the terminal device sends a first signal to the network device, where the first signal is used to trigger the network device to adjust the transmission power.

[0013] Based on the above technical solution, during the wireless link monitoring and recovery process, the terminal device will send a first signal to the network device when the first condition is met to trigger the network device to adjust the transmission power. If the first condition is not met, the terminal device will perform reconstruction.

[0014] In a possible implementation of the first aspect, a terminal device includes a first module and a second module for sending and receiving information, the first module and the second module differ in at least one of power consumption, hardware composition, and a waveform of a transmitted signal, the power consumption of the first module is less than the power consumption of the second module, and the terminal device sending a first signal to the network device includes:

[0015] The terminal device sends a first signal to the network device based on the first module.

[0016] Based on the above technical solution, the terminal device includes a first module with lower power consumption and a first module with higher power consumption. The terminal device sends a first signal to the network device based on the first module with lower power consumption, which can further reduce the energy consumption of the device.

[0017] Optionally, when the terminal device sends a first signal to the network device based on the first module, the network device may receive the first signal based on the first module, and then adjust the transmission power of the second module of the network device according to the first signal.

[0018] Optionally, the terminal device may also send the first signal to the network device based on the second module. Correspondingly, the network device receives the first signal based on the first module / second module, and then adjusts the transmission power of the second module of the network device according to the first signal.

[0019] In a possible implementation of the first aspect, the first condition includes at least one of the following:

[0020] The terminal device sends N out-of-sync indications to the upper layer continuously, and the network device has power margin, N is less than N310, and N is a positive integer; or,

[0021] The terminal device continuously sends N310 out-of-sync indications to the upper layer, and the network device has power margin.

[0022] Based on the above technical solution, the impact of network device power headroom is considered during radio link monitoring and recovery. When network devices have power headroom, link recovery is prioritized by triggering them to adjust their transmit power. If network devices have power headroom, upon detecting N consecutive out-of-sync indications sent to higher layers, the terminal device sets N to less than N310, thereby eliminating the need to start timer T310 and avoiding triggering radio link failure.

[0023] In a possible implementation manner of the first aspect, a condition for the terminal device to send an out-of-synchronization indication includes at least one of the following:

[0024] The signal quality of the wireless link is less than a first threshold; or,

[0025] The signal quality of the wireless link is less than a first threshold, and the network device has power headroom.

[0026] Based on the above technical solution, the terminal device includes the power margin of the network device as one of the conditions for sending the out-of-sync indication, so that when the network device has power margin, it will prioritize restoring the link by triggering the network device to adjust the transmission power to reduce connection reconstruction.

[0027] In a possible implementation of the first aspect, the terminal device performs beam failure monitoring and recovery according to the first information and the second information, including:

[0028] When the second condition is met, the terminal device sends a first signal to the network device, where the first signal is used to trigger the network device to adjust the transmission power.

[0029] Based on the above technical solution, during beam failure monitoring and recovery, the terminal device sends a first signal to the network device to trigger the network device to adjust its transmit power when the second condition is met. The terminal device only performs beam switching if the first condition is not met.

[0030] In a possible implementation of the first aspect, the second condition includes at least one of the following:

[0031] The number of beam failure indications is equal to the second threshold, and there is a power margin in the first beam; or

[0032] The signal quality of the first beam is less than the third threshold, the first beam has a power margin, and the second threshold is less than the third threshold; or,

[0033] The sum of the signal quality of the first beam and the power margin of the first beam is greater than or equal to a fourth threshold; or,

[0034] The signal quality of the first beam is less than a fifth threshold, and the sum of the signal quality of the first beam and the power headroom of the first beam is greater than or equal to a sixth threshold; or,

[0035] The signal quality of the candidate beam is less than a fifth threshold, and the sum of the signal quality of the candidate beam and the power margin of the candidate beam is greater than or equal to a sixth threshold.

[0036] Based on the above technical solution, the influence of the beam power margin is considered during the beam failure monitoring and recovery process. When the beam has power margin, the beam is restored by triggering the network device to adjust the transmit power first.

[0037] In a possible implementation manner of the first aspect, a condition for the terminal device to send a beam failure indication is:

[0038] The signal quality of the first beam is less than a third threshold; or

[0039] The signal quality of the first beam is less than a third threshold, and there is no power margin in the first beam; or,

[0040] The signal quality of the first beam is less than a third threshold, and the signal quality of the candidate beam is greater than or equal to the third threshold; or,

[0041] The signal quality of the first beam is less than a third threshold, and the signal quality of the candidate beam is greater than or equal to a seventh threshold.

[0042] Based on the above technical solution, the terminal device incorporates the power margin of the beam into one of the conditions for sending a beam failure indication, so that when the beam has power margin, it will prioritize restoring the beam by triggering the network device to adjust the transmission power to reduce unnecessary beam switching processes.

[0043] Optionally, the beam failure indication may also be referred to as a beam failure event indication or a beam failure instance indication.

[0044] In a possible implementation of the first aspect, the terminal device performs beam failure monitoring and recovery according to the first information and the second information, including:

[0045] When the third condition is met, the terminal device sends a second signal to the network device, where the second signal is used to switch from the first beam to the candidate beam.

[0046] Based on the above technical solution, during the process of beam failure monitoring and recovery performed by the terminal device, the terminal device will send a second signal to the network device when the third condition is met to trigger beam switching.

[0047] In a possible implementation of the first aspect, the third condition includes:

[0048] The sum of the signal quality of the first beam and the power headroom of the first beam is less than a fourth threshold, and the sum of the signal quality of the candidate beam and the power headroom of the candidate beam is greater than or equal to the fourth threshold.

[0049] Based on the above technical solution, the terminal device includes the power margin of the first beam as one of the conditions for beam switching. When the sum of the signal quality of the first beam and the power margin of the first beam is less than the fourth threshold, it means that adjusting the transmission power of the first beam can no longer restore the first beam. In this case, beam switching is performed, thereby reducing unnecessary beam recovery and switching processes.

[0050] In a possible implementation manner of the first aspect, at least one of a resource, a waveform, and a sequence of the first signal and the second signal is different.

[0051] Based on the above technical solution, the first signal is used to trigger the network device to adjust the transmit power, and the second signal is used to switch from the first beam to the candidate beam. The terminal device can use one or more of different resources (time-frequency resources), waveforms (different signals), or sequences (different preamble sequences) to perform beam recovery requests based on different scenarios, so as to adjust the wireless link quality by adjusting the transmit power of the network device first, thereby ensuring the availability of the connection / beam.

[0052] In a possible implementation of the first aspect, the method further includes:

[0053] The terminal device does not detect that the transmission power of the network device is adjusted within the first time period, or after the terminal device detects that the transmission power of the network device is adjusted within the first time period, the signal quality of the first beam is less than the third threshold, and the terminal device sends a beam recovery request failure indication to the upper layer.

[0054] Based on the above technical solution, in the case where the first signal triggers the network device to adjust the transmission power, after sending the first signal to the network device, the terminal device will process the beam recovery response process in combination with the adjustment of the transmission power of the network device to ensure the availability of the current beam.

[0055] In a second aspect, the present application provides a communication method, which is performed by a network device, or by some components in the network device (such as a processor, chip, or chip system), or the network device can be a logic module or software that can implement all or part of the functions of the communication device. The network device includes a first module and a second module for sending and receiving information, and the first module and the second module differ in at least one of power consumption, hardware composition, and waveform of the transmitted signal, and the power consumption of the first module is less than the power consumption of the second module. In this method, the network device sends second information to the terminal device, and the second information is related to the power headroom of the second module of the network device.

[0056] Similar to the terminal device, the network device also includes a first module with lower power consumption and a second module with higher power consumption. Since the transmission power of the second module can be dynamically adjusted, the network device sends second information to the terminal device so that the terminal device adjusts the wireless link quality based on the power margin of the network device to ensure the availability of the connection or beam.

[0057] In a possible implementation of the second aspect, the method further includes:

[0058] The network device receives a first signal from the terminal device;

[0059] The network device adjusts the transmission power of the second module of the network device according to the first signal.

[0060] In a possible implementation of the second aspect, receiving the first signal from the terminal device includes:

[0061] The network device receives a first signal from the terminal device based on the first module;

[0062] In a possible implementation of the second aspect, the method further includes:

[0063] The network device sends third information to the terminal device, where the third information is used to indicate a threshold N of the number of times the terminal device sends an out-of-sync indication, where N is related to the first condition for the terminal device to send a first signal, and N is less than or equal to N310.

[0064] In a possible implementation of the second aspect, the method further includes:

[0065] The network device sends fourth information to the terminal device, where the fourth information is used to configure at least one of the following information:

[0066] a first threshold corresponding to the signal quality of the wireless link; or

[0067] a second threshold corresponding to the number of beam failure indications; or

[0068] a third threshold corresponding to the signal quality of the first beam; or

[0069] a fourth threshold corresponding to the sum of the signal quality of the first beam and the power margin of the first beam; or

[0070] a fifth threshold corresponding to the signal quality of the first beam; or

[0071] a fifth threshold corresponding to the signal quality of the candidate beam; or

[0072] a sixth threshold corresponding to the sum of the signal quality of the candidate beam and the power margin of the candidate beam; or

[0073] A seventh threshold corresponding to the signal quality of the candidate beam.

[0074] In a possible implementation of the second aspect, the method further includes:

[0075] The network device receives a second signal from the terminal device;

[0076] The network device switches from the first beam to the candidate beam according to the second signal.

[0077] A third aspect of the present application provides a communication device, which includes a transceiver unit and a processing unit. The processing unit is used to obtain first information, the first information including the signal quality of the wireless link between the network device and / or the signal quality of the beam between the network device; the transceiver unit is used to receive second information from the network device, the second information being related to the power margin of the network device; the processing unit is also used to perform beam failure monitoring and recovery, and / or wireless link monitoring and recovery based on the first information and the second information.

[0078] In the third aspect of the present application, the constituent modules of the communication device can also be used to execute the steps performed in each possible implementation method of the first aspect and achieve corresponding technical effects. For details, please refer to the first aspect and will not be repeated here.

[0079] In a fourth aspect, the present application provides a communication device, which includes a transceiver unit; the transceiver unit is used to send second information to the terminal device, where the second information is related to the power margin of the second module of the network device.

[0080] In the fourth aspect of the present application, the constituent modules of the communication device can also be used to execute the steps performed in each possible implementation method of the second aspect and achieve corresponding technical effects. For details, please refer to the second aspect and will not be repeated here.

[0081] In a fifth aspect, the present application provides a communication device comprising at least one processor coupled to a memory; the memory is used to store programs or instructions; and the at least one processor is used to execute the program or instructions so that the device implements a method of any possible implementation of any of the first to second aspects.

[0082] In a possible implementation, the communication device further includes a memory. Optionally, the processor and the memory are integrated together.

[0083] In a sixth aspect, the present application provides a communication device comprising at least one logic circuit and an input / output interface; the logic circuit is used to execute a method as any possible implementation method in any of the first to second aspects mentioned above.

[0084] A seventh aspect of the present application provides a communication system, which includes the above-mentioned terminal device and network device.

[0085] In an eighth aspect, the present application provides a computer-readable storage medium for storing one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes a method as any possible implementation of any one of the first to second aspects above.

[0086] In a ninth aspect, the present application provides a computer program product (or computer program). When the computer program in the computer program product is executed by the processor, the processor executes a method of any possible implementation of any one of the first to second aspects above.

[0087] In a tenth aspect, the present application provides a chip system comprising at least one processor for supporting a communication device to implement any possible implementation method of any one of the first to second aspects.

[0088] In one possible design, the chip system may further include a memory for storing program instructions and data necessary for the communication device. The chip system may be composed of a chip or may include a chip and other discrete components. Optionally, the chip system may also include an interface circuit that provides program instructions and / or data to at least one processor.

[0089] Among them, the technical effects brought about by any design method in the third to tenth aspects can refer to the technical effects brought about by the different design methods in the above-mentioned first to second aspects, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0090] Figures 1a to 1f are schematic diagrams of a communication system provided by this application;

[0091] FIG2 a is a schematic diagram of the coverage range after the PDSCH transmit power is adjusted;

[0092] FIG2 b is a schematic diagram of the coverage of the main transceiver and the low-power transceiver of the network device;

[0093] FIG2c is a schematic diagram of triggering a network device to increase transmit power;

[0094] Figure 2d is a schematic diagram of wireless link monitoring;

[0095] Figure 2e is a schematic diagram of beam failure monitoring and recovery;

[0096] FIG3 is a schematic diagram of an implementation of a communication method provided in an embodiment of the present application;

[0097] FIG4 is another schematic diagram of wireless link monitoring provided in an embodiment of the present application;

[0098] FIG5 is a schematic diagram of beam failure after the transmit power of a network device according to an embodiment of the present application is adjusted;

[0099] 6 to 10 are schematic diagrams of the communication device provided in this application. DETAILED DESCRIPTION

[0100] First, some of the terms used in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

[0101] (1) Terminal device: It can be a wireless terminal device that can receive network device scheduling and instruction information. The wireless terminal device can be a device that provides voice and / or data connectivity to the user, or a handheld device with wireless connection function, or other processing device connected to a wireless modem.

[0102] Terminal devices can communicate with one or more core networks or the Internet via a radio access network (RAN). Terminal devices can be mobile terminal devices, such as mobile phones (also known as "cellular" phones, mobile phones), computers, and data cards. For example, they can be portable, pocket-sized, handheld, computer-built-in, or vehicle-mounted mobile devices that exchange voice and / or data with the radio access network. Examples include personal communication service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), tablet computers, and computers with wireless transceiver capabilities. Wireless terminal equipment can also be called system, subscriber unit, subscriber station, mobile station, mobile station (MS), remote station, access point (AP), remote terminal equipment (remote terminal), access terminal equipment (access terminal), user terminal equipment (user terminal), user agent, subscriber station (SS), customer premises equipment (CPE), terminal, user equipment (UE), mobile terminal (MT), etc.

[0103] As an example and not a limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices or smart wearable devices, etc., which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, etc., as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets, smart helmets, and smart jewelry for vital sign monitoring.

[0104] The terminal can also be a drone, a robot, a terminal in device-to-device communication (D2D), a vehicle to everything (V2X) terminal, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc.

[0105] In addition, the terminal device may also be a terminal device in a communication system that has evolved after the fifth generation (5G) communication system (e.g., a sixth generation (6G) communication system) or a terminal device in a future public land mobile network (PLMN). For example, the 6G network can further expand the form and function of 5G communication terminals. 6G terminals include but are not limited to vehicles, cellular network terminals (with integrated satellite terminal functions), drones, and Internet of Things (IoT) devices.

[0106] In an embodiment of the present application, the terminal device may also obtain AI services provided by the network device. Optionally, the terminal device may also have AI processing capabilities.

[0107] (2) Network equipment: It can be a device in a wireless network, for example, a network device can be a RAN node (or device) that connects a terminal device to a wireless network, which can also be called a base station. Currently, some examples of RAN equipment are: base station, evolved NodeB (eNodeB), gNB (gNodeB) in a 5G communication system, transmission reception point (TRP), evolved Node B (eNB), radio network controller (RNC), Node B (NB), home base station (e.g., home evolved Node B, or home Node B, HNB), base band unit (BBU), base station, transmission reception point, or wireless fidelity (Wi-Fi) access point AP in a 6G communication system or a next-generation wireless communication system. In addition, in a network structure, a network device can include a centralized unit (CU) node, a distributed unit (DU) node, or a RAN device including a CU node and a DU node.

[0108] Alternatively, a RAN node can be a macro base station, micro base station, indoor base station, relay node, donor node, or a wireless controller in a cloud radio access network (CRAN) scenario. A RAN node can also be a server, wearable device, vehicle, or vehicle-mounted device. For example, the access network device in vehicle-to-everything (V2X) technology can be a roadside unit (RSU).

[0109] In another possible scenario, multiple RAN nodes collaborate to assist the terminal in achieving wireless access, and different RAN nodes respectively implement part of the functions of the base station. For example, the RAN node can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU can be set separately, or they can be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0110] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in an open access network (open RAN, O-RAN or ORAN) system, CU may also be called O-CU (open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, this application takes CU, CU-CP, CU-UP, DU and RU as examples for description. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0111] The communication between the access network device and the terminal device follows a certain protocol layer structure. The protocol layer may include a control plane protocol layer and a user plane protocol layer. The control plane protocol layer may include at least one of the following: a radio resource control (RRC) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, a media access control (MAC) layer, or a physical (PHY) layer. The user plane protocol layer may include at least one of the following: a service data adaptation protocol (SDAP) layer, a PDCP layer, an RLC layer, a MAC layer, or a physical layer.

[0112] For the correspondence between network elements in the ORAN system and their achievable protocol layer functions, please refer to Table 1 below.

[0113] Table 1

[0114] The network device may be any other device that provides wireless communication functionality to the terminal device. The embodiments of this application do not limit the specific technology and device form used by the network device. For ease of description, the embodiments of this application do not limit this.

[0115] The network equipment may also include core network equipment, such as a mobility management entity (MME), a home subscriber server (HSS), a serving gateway (S-GW), a policy and charging rules function (PCRF), and a public data network gateway (PDN gateway, P-GW) in a fourth generation (4G) network; and network elements such as an access and mobility management function (AMF), a user plane function (UPF), or a session management function (SMF) in a 5G network. In addition, the core network equipment may also include other core network equipment in a 6G network and the next generation network of the 6G network.

[0116] In an embodiment of the present application, the above-mentioned network device may also have a network node with AI capabilities, which can provide AI services for terminals or other network devices. For example, it can be an AI node of a network device (access network or core network), a computing power node, a RAN node with AI capabilities, a core network element with AI capabilities, etc.

[0117] In the embodiments of the present application, the apparatus for implementing the function of the network device may be the network device, or may be a device capable of supporting the network device in implementing the function, such as a chip system, which may be installed in the network device. In the technical solutions provided in the embodiments of the present application, the technical solutions provided in the embodiments of the present application are described by taking the network device as an example.

[0118] (3) Beam

[0119] A beam is a communication resource that creates a unique, directional transmission or reception effect through an antenna array in a transmitter or receiver of a network device or terminal. This effect is similar to the beam formed by a flashlight that focuses light in a single direction. Transmitting and receiving signals using beams can effectively increase signal transmission distance.

[0120] Beams can be divided into transmit beams and receive beams. The technology for forming beams can be beamforming technology or other technical means. Beamforming includes transmit beamforming and receive beamforming. The beamforming technology can be digital beamforming technology, analog beamforming technology, or hybrid digital / analog beamforming technology.

[0121] Transmit beam: The transmitting end device transmits a signal with a certain beamforming weight, so that the transmitted signal forms a beam with spatial directionality. In the uplink direction, the transmitting end device can be a terminal device; in the downlink direction, the transmitting end device can be a network device.

[0122] Receive beam: The receiving device receives signals using certain beamforming weights, forming a spatially directional beam. In the uplink direction, the receiving device can be a network device; in the downlink direction, the receiving device can be a terminal device.

[0123] The beam can be a wide beam, a narrow beam, or other types of beams.

[0124] Beams generally correspond to resources. For example, when performing beam measurement, the network device measures different beams through different resources, and the terminal device feeds back the measured resource quality, so that the network device can know the quality of the corresponding beam. During data transmission, the beam can also be indicated by its corresponding resource. For example, the network device indicates a transmission configuration indication-state through the transmission configuration index (TCI) field in the downlink control information (DCI), and the terminal device determines the beam corresponding to the reference resource based on the reference resource contained in the TCI-state. Different beams can be considered as different resources, and the same information or different information can be sent using (or through) different beams.

[0125] A beam pair is based on the concept of a beam. A beam pair typically consists of a transmit beam from a transmitting device and a receive beam from a receiving device. Unless otherwise specified, the transmit beam in the following text refers to the transmit beam of the network device, and the receive beam refers to the receive beam of the terminal.

[0126] In a communication system, such as a 5G new radio (NR) system, both network equipment and terminal devices can generate one or more transmit beams and one or more receive beams. Network equipment and terminal devices need to perform beam alignment before transmitting data. In the communication protocol, a beam can be specifically characterized as a digital beam, an analog beam, a spatial domain filter, a spatial filter, a spatial parameter, TCI, a TCI-state, etc. The beam used to send a signal can be called a transmission beam (or Tx beam), a spatial domain transmission filter, a spatial transmission filter, a spatial domain transmission parameter, a spatial transmission parameter, etc. The beam used to receive signals can be called a reception beam (or Rx beam), a spatial domain reception filter, a spatial reception filter, a spatial domain reception parameter, a spatial reception parameter, etc. It can be understood that the embodiments of the present application uniformly use beams for description, but beams can be replaced by other equivalent concepts and are not limited to the concepts mentioned above.

[0127] (4) Resources

[0128] In communication protocols, reference signals are configured as resources. Network equipment allocates each reference signal to a terminal device as a resource. A resource is a configuration information unit that typically includes parameters related to a reference signal, such as the reference signal's time-frequency resource location, number of ports, and time domain type (periodic, semi-static, or aperiodic).

[0129] The resource may be an uplink signal resource or a downlink signal resource.

[0130] The uplink signal includes but is not limited to a sounding reference signal (SRS) and a demodulation reference signal (DMRS).

[0131] Downlink signals include, but are not limited to, channel state information reference signal (CSI-RS), cell-specific reference signal (CRS), demodulation reference signal (DMRS), and synchronization system / physical broadcast channel block (SS / PBCH block). The SS / PBCH block can be referred to as a synchronization signal block (SSB).

[0132] Resources can be configured through RRC messages. A resource is a data structure containing parameters related to its corresponding uplink / downlink signal. Examples include the uplink / downlink signal type, the resource element carrying the uplink / downlink signal, the uplink / downlink signal transmission time and period, and the number of ports used to transmit the uplink / downlink signal. Each uplink / downlink signal resource has a unique identifier to identify the downlink signal resource.

[0133] (5) Chirp signal

[0134] A chirp signal is a signal in which the carrier frequency increases linearly over the duration of a pulse when encoding the pulse. In other words, the frequency of the signal increases or decreases over time.

[0135] (6) Configuration and pre-configuration: In this application, configuration and pre-configuration are used simultaneously. Configuration refers to the network device / server sending some parameter configuration information or parameter values ​​to the terminal through messages or signaling, so that the terminal can determine the communication parameters or resources during transmission based on these values ​​or information. Pre-configuration is similar to configuration and can be parameter information or parameter values ​​pre-negotiated between the network device / server and the terminal device, parameter information or parameter values ​​used by the base station / network device or terminal device as specified in the standard protocol, or parameter information or parameter values ​​pre-stored in the base station / server or terminal device. This application does not limit this.

[0136] Furthermore, these values ​​and parameters can be changed or updated.

[0137] (7) The terms "system" and "network" in the embodiments of the present application can be used interchangeably. "Multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, "at least one of A, B and C" includes A, B, C, AB, AC, BC or ABC. In addition, unless otherwise specified, the ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, timing, priority or importance of multiple objects.

[0138] (8) In the embodiments of the present application, “sending” and “receiving” refer to the direction of signal transmission. For example, “sending information to XX” can be understood as the destination of the information being XX, which can include direct sending via the air interface, or indirect sending via the air interface from other units or modules. “Receiving information from YY” can be understood as the source of the information being YY, which can include direct receiving from YY via the air interface, or indirect receiving from YY via the air interface from other units or modules. “Sending” can also be understood as the “output” of the chip interface, and “receiving” can also be understood as the “input” of the chip interface.

[0139] In other words, sending and receiving can be performed between devices, for example, between a network device and a terminal device, or can be performed within a device, for example, sending or receiving between components, modules, chips, software modules or hardware modules within the device through a bus, wiring or interface.

[0140] It is understandable that information may be processed between the source and destination of information transmission, such as coding, modulation, etc., but the destination can understand the valid information from the source. Similar expressions in this application can be understood similarly and will not be repeated.

[0141] (9) In the embodiments of the present application, "indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. The information indicated by a certain information (such as the indication information described below) is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, directly indicating the information to be indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated may also be indirectly indicated by indicating other information, wherein the other information is associated with the information to be indicated; or only a part of the information to be indicated may be indicated, while the other part of the information to be indicated is known or agreed in advance. For example, the indication of specific information may be achieved by means of the arrangement order of each information agreed in advance (such as predefined by the protocol), thereby reducing the indication overhead to a certain extent. The present application does not limit the specific method of indication. It is understandable that for the sender of the indication information, the indication information can be used to indicate the information to be indicated, and for the receiver of the indication information, the indication information can be used to determine the information to be indicated.

[0142] In this application, unless otherwise specified, the same or similar parts between the various embodiments can refer to each other. In the various embodiments of this application, and the various methods / designs / implementations in each embodiment, if there is no special explanation and logical conflict, the terms and / or descriptions between different embodiments and the various methods / designs / implementations in each embodiment are consistent and can be referenced to each other. The technical features in different embodiments and the various methods / designs / implementations in each embodiment can be combined to form new embodiments, methods, or implementations according to their inherent logical relationships. The following description of the implementation methods of this application does not constitute a limitation on the scope of protection of this application.

[0143] This application can be applied to a long term evolution (LTE) system, a NR system, or a communication system evolved after 5G (for example, Beyond 5G (B5G), 5.5G, 6G, etc.). The communication system includes at least one network device and / or at least one terminal device.

[0144] Please refer to Figure 1a, which is a schematic diagram of the architecture of a communication system 1000 used in an embodiment of the present application. As shown in Figure 1a, the communication system includes a radio access network (RAN) 100 and a core network 200. Optionally, the communication system 1000 may also include the Internet 300. The RAN 100 includes at least one RAN node (such as 110a and 110b in Figure 1a, collectively referred to as 110) and may also include at least one terminal (such as 120a-120j in Figure 1a, collectively referred to as 120). The RAN 100 may also include other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in Figure 1a). The terminal 120 is connected to the RAN node 110 wirelessly, and the RAN node 110 is connected to the core network 200 wirelessly or by wire. The core network devices in the core network 200 and the RAN node 110 in the RAN 100 may be independent and different physical devices, or they may be the same physical device that integrates the logical functions of the core network devices and the logical functions of the RAN nodes. Terminals and RAN nodes may be connected to each other via wired or wireless means.

[0145] RAN100 may be an evolved universal terrestrial radio access (E-UTRA) system, a NR system, a 6G system, or a future radio access system defined in the 3rd Generation Partnership Project (3GPP). RAN100 may also include two or more of the aforementioned different radio access systems. RAN100 may also be an open RAN (O-RAN).

[0146] For ease of description, a base station is taken as an example of a RAN node for description below.

[0147] Base stations and terminals can be fixed or mobile. They can be deployed on land, indoors or outdoors, handheld or vehicle-mounted; on water; or on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of base stations and terminals.

[0148] The roles of base stations and terminals can be relative. For example, the helicopter or drone 120i in Figure 1a can be configured as a mobile base station. To terminals 120j accessing the wireless access network 100 via 120i, terminal 120i is a base station. However, to base station 110a, 120i is a terminal, meaning that communication between 110a and 120i occurs via a wireless air interface protocol. Of course, communication between 110a and 120i can also occur via a base station-to-base station interface protocol. In this case, 120i is also a base station relative to 110a. Therefore, base stations and terminals can be collectively referred to as communication devices. 110a and 110b in Figure 1a can be referred to as communication devices with base station functionality, while 120a-120j in Figure 1a can be referred to as communication devices with terminal functionality.

[0149] Communication between base stations and terminals, between base stations, and between terminals can be carried out through authorized spectrum, unauthorized spectrum, or both; communication can be carried out through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or spectrum below 6 GHz and spectrum above 6 GHz. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

[0150] In the embodiments of the present application, the functions of the base station may also be performed by a module (such as a chip) in the base station, or by a control subsystem that includes the base station functions. The control subsystem that includes the base station functions here may be a control center in the above-mentioned application scenarios such as smart grid, industrial control, smart transportation, and smart city. The functions of the terminal may also be performed by a module (such as a chip or modem) in the terminal, or by a device that includes the terminal functions.

[0151] Figure 1b is another schematic diagram of a communication system provided by an embodiment of the present application. In Figure 1b, the network device is a base station as an example for illustration, and device 1 and device 2 are both terminal devices. As shown in Figure 1b, the communication link between device 1 and device 2 can be called a sidelink (SL), and the communication link between device 1 (or device 2) and the base station can be called an uplink and a downlink, including an uplink and a downlink. It can be seen that a sidelink is a communication mechanism that allows different terminal devices to communicate directly without going through a network device.

[0152] Optionally, in the sidelink (SL), generally speaking, the transmitting device and the receiving device can be a terminal device or network device of the same type, or a road side unit (RSU) and a terminal device, wherein the RSU is a road side station or road side unit from a physical entity point of view, and from a functional point of view, the RSU can be a terminal device or a network device, and this application does not impose any restrictions on this. That is, the transmitting device is a terminal device and the receiving device is also a terminal device; or, the transmitting device is a road side station and the receiving device is also a terminal device; or, the transmitting device is a terminal device and the receiving device is also a road side station. In addition, the sidelink can also be a base station device of the same type or different types. At this time, the function of the sidelink is similar to that of the relay link, but the air interface technology used can be the same or different.

[0153] Exemplarily, the sidelink supports broadcast, unicast, and multicast.

[0154] Broadcast communication is similar to network device broadcasting system information, that is, the terminal device sends broadcast service data to the outside without encryption. Any other terminal device within the effective receiving range can receive the broadcast service data if it is interested in the broadcast service.

[0155] Unicast communication is similar to data communication that occurs after an RRC connection is established between a terminal device and a network device. It requires a unicast connection to be established between the two devices. After the unicast connection is established, the two devices can communicate data based on a negotiated identifier. This data can be encrypted or unencrypted. Unlike broadcasting, unicast communication is only possible between two devices that have established a unicast connection.

[0156] Optionally, a unicast communication on the sidelink corresponds to a pair of a source layer-2 identifier (denoted as source L2 ID) and a destination layer-2 identifier (denoted as destination L2 ID). Optionally, the source L2 ID and the destination L2 ID are included in a subheader of a media access control protocol data unit (MAC PDU) in the sidelink to ensure that the data is transmitted to the correct receiving end.

[0157] Multicast communication refers to communication between all terminal devices in a communication group. Any terminal device in the group can send and receive data of the multicast service.

[0158] As shown in Figure 1c, when a terminal device (denoted as UE1) communicates directly with another terminal device (denoted as UE2) without going through a network device, the communication link between the two terminal devices can be called a sidelink, or the two terminal devices are said to communicate based on the proximity-based services communication 5 (PC5) port.

[0159] As shown in Figure 1d, V2X communication technology, a typical application of sidelinks, leverages and enhances current cellular network features and elements to enable low-latency and high-reliability communications between various nodes in a vehicle network, including vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P), vehicle-to-infrastructure (V2I), and vehicle-to-network (V2N). As cellular systems evolve from 4G Long Term Evolution (LTE) to 5G, C-V2X is evolving from LTE-V2X to NR-V2X (New Radio V2X).

[0160] Furthermore, V2X communication has significant potential to reduce vehicle collisions, thereby reducing the number of casualties. The advantages of V2X extend beyond safety. Vehicles capable of V2X communication contribute to better traffic management, further promoting green transportation and lowering energy consumption. The Intelligent Transportation System (ITS) is an application that integrates V2X. Based on V2X technology, vehicle users (V-UEs) can transmit information such as their location, speed, and intentions (turns, lane changes, and reversing) to surrounding V-UEs periodically, as well as information triggered by aperiodic events. Similarly, V-UEs receive real-time information from surrounding users. 5G NR V2X supports lower transmission latency, more reliable communication, higher throughput, and a better user experience, meeting the needs of a wider range of application scenarios. Furthermore, the vehicle-to-vehicle communication technology supported by V2X can be extended to device-to-device (D2D) communication in any system.

[0161] As shown in Figure 1e, the application scenario of the embodiment of the present application can be an SA scenario, and the terminal device can be connected to a single base station, wherein the base station to which the terminal device is connected and the core network to which the base station is connected are of the same standard. For example, if the core network is 5G Core, the corresponding base station is a 5G base station, and the 5G base station is connected to the 5G Core; for another example, if the core network is 6G Core, the corresponding base station is a 6G base station, and the 6G base station is connected to the 6G Core. It should be noted that the number of terminal devices can be one or more.

[0162] As shown in Figure 1f, the application scenario of the embodiment of the present application can be a DC scenario, and the terminal device can be connected to base stations of different standards or the same standard at the same time. For example, the core network is 5G Core, and the terminal device can be connected to a 5G base station and a 6G base station at the same time, wherein the 5G base station serves as the primary station and the 6G base station serves as the secondary station; for another example, the core network is 6G Core, and the terminal device can be connected to a 5G base station and a 6G base station at the same time, wherein the 6G base station serves as the primary station and the 5G base station serves as the secondary station; for another example, the core network can be 6G Core, and the terminal device can be connected to two 6G base stations at the same time, and both the primary station and the secondary station are 6G base stations. It should be noted that the number of terminal devices can be one or more.

[0163] In a wireless communication system, communication between terminal devices and network devices follows a certain protocol layer structure. For example, the protocol layer structure may include the RRC layer, the packet data convergence protocol (PDCP) layer, the radio link control (RLC) layer, the media access control (MAC) layer, and the physical layer (PHY) layer. In the 3rd Generation Partnership Project (3GPP) standard, Layer 1 (L1) may refer to the PHY layer, Layer 2 may refer to the MAC layer, and Layer 3 may refer to the RRC layer.

[0164] The technical solution provided in this application can be applied to wireless communication systems (for example, the systems shown in Figures 1a, 1b, 1c, 1d, 1e, or 1f), and applicable scenarios include terrestrial cellular communications, non-terrestrial communications NTN, satellite communications, high altitude platform station (HAPS) communications, V2X, integrated access and backhaul (IAB), reconfigurable intelligent surface (RIS) communications, and other scenarios.

[0165] In wireless communication systems, as the scale of the network continues to expand, network energy consumption is also increasing. In order to reduce network energy consumption, one of the approaches is to enable adaptive adjustment of the power offset between the physical downlink shared channel (PDSCH) and the channel state information reference signal (CSI-RS). The network device can broadcast the transmit power of the SSB through a system message to indicate the transmit power of the secondary synchronization signal (SSS). In addition, the network device can also configure the power offset between the non-zero power channel state information reference signal (NZP CSI-RS) and the SSB through RRC signaling to determine the transmit power of the NZP CSI-RS. In addition, the network device will also configure the power offset between the PDSCH and the NZP CSI-RS.

[0166] To better achieve effective adjustment of the power offset between PDSCH and CSI-RS, the protocol has made corresponding enhancements to CSI measurement and feedback. The main idea is to measure and report based on different power offset values ​​to assist network equipment in determining the optimal power offset between PDSCH and CSI-RS and notify the terminal equipment accordingly.

[0167] As shown in Figure 2a, based on the above enhancements, the transmit power of the PDSCH can be adjusted semi-statically more effectively. In other words, the transmit power of the PDSCH can be less than the maximum transmit power, thereby reducing the energy consumption of network devices. However, the above enhancements only adjust the transmit power of the PDSCH. The transmit power of common signals, such as SSB, system information block 1 (SIB1), other system information (OSI), and paging messages, is not adjusted. The transmit power of common signals is still sent through SIB1, and whether to adjust it is left to the network devices. When the network devices decide to adjust, they will update the SIB1 message accordingly. However, in actual networks, after the network is planned, the transmit power of common signals is not adjusted to avoid coverage holes.

[0168] Based on the above problems, in order to reduce the energy consumption of network devices, a first module and a second module are deployed on the network devices. The first module and the second module differ in at least one of power consumption, hardware composition, and waveform of the transmitted signal, and the power consumption of the first module is less than that of the second module. The first module is, for example, a low-power radio (LR) transceiver, which is based on a chirp signal, an on-off key (OOK) signal, or a passive reflection signal. The second module is, for example, a main radio (MR) transceiver, which is based on orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). As shown in Figure 2b, the low-power transceiver ensures coverage, and the transmit power of the main transceiver is dynamically adjusted according to user requests. Based on this, when there are only nearby users in the network or even when the network is unloaded, the main transceiver can transmit signals at a lower transmit power. For users that are not covered by the primary transceiver, they can send auxiliary information to trigger the base station to increase the transmission power or increase the number of repetitions.

[0169] In a scenario where network devices are deployed with both low-power transceivers and main transceivers, the transmit power of the main transceiver can be dynamically adjusted because the signals sent by the two have different waveforms and transmit powers. Under this architecture, if the network device does not transmit the signal at full power, directly monitoring the beam and / or wireless link based on the measurement results of the signal may increase unnecessary connection reconstruction or recovery processes and increase network energy consumption. When the terminal device detects poor signal quality, it is necessary to consider whether the network device has power headroom. If the network device has power headroom, theoretically, as shown in Figure 2c, when the terminal device is out of the coverage range of the main transceiver or the signal quality is poor, the wireless link can also restore the link or beam by triggering the network device to increase the transmit power.

[0170] To solve the above problems, the present invention provides a communication method. Before introducing the specific implementation of the method provided in the present invention, the process of wireless link monitoring and beam failure monitoring and recovery is first introduced.

[0171] Radio link monitoring (RLM) refers to the continuous tracking of radio link quality by a terminal device while connected. For a serving cell, the network provides the terminal with a set of reference signal resources for RLM, called radio link monitoring reference signals (RLM-RS). RLM-RS can be a set of SS / PBCH blocks, a set of CSI-RS, or a combination of SSBs and CSI-RS, depending on higher-layer configuration.

[0172] The terminal device uses RLM-RS to estimate the block error rate (BLER) of the physical downlink control channel (PDCCH) of the serving cell. As shown in Figure 2d, if the BLER estimated by the terminal device for each RLM-RS within a preset time length T is greater than or equal to the preset threshold Qout (that is, the results of all measurement resources within the evaluation period are less than the threshold), the physical layer (PHY) of the terminal device will send an out-of-sync indication to the upper layer (RRC layer). After that, the upper layer continues to monitor, and when N310 out-of-sync indications are received consecutively, the timer T310 is triggered to start. During the duration of T310, if after the timer is started, one of the BLER results estimated by the physical layer of the terminal device for each RLM-RS of another preset time length T is greater than or equal to another preset threshold Qin (that is, the result of any measurement resource within the evaluation period is greater than or equal to the threshold), it indicates that the quality of the wireless link has improved. The physical layer of the terminal device sends an in-sync indication to the upper layer. If N311 in-sync indications are received consecutively, the timer T310 is stopped to indicate that the link has been restored. Otherwise, if T310 times out, the radio link is considered to have failed, triggering the RRC connection reestablishment process.

[0173] When users are indoors or moving, the radio link between the terminal device and network equipment is susceptible to RF signal obstruction and degradation, which may cause the communication link to be interrupted, resulting in beam failure. To more quickly detect beam failure, the terminal device can use the following process to measure changes in the communication link and recover from them to continue service. The beam failure monitoring and recovery process is shown in Figure 2e and is mainly divided into four stages:

[0174] Beam failure detection:

[0175] The terminal device measures the beam failure detection reference signal at the physical layer, such as reference signals such as SSB or CSI-RS, and determines whether a beam failure event has occurred based on the measurement results. The terminal device measures the beam failure detection reference signal at the physical layer, and determines whether a beam failure event has occurred based on the measurement results. The judgment condition is: if the metrics of all serving beams are detected, such as the block error rate of PDCCH exceeds the preset threshold Qout,LR (that is, the measurement result is lower than the threshold), it is determined to be a beam failure instance. The physical layer of the terminal device reports a beam failure indication to the MAC layer of the terminal device. The reporting process is periodic. The MAC layer uses a counter to count the indications reported by the physical layer. When the number of consecutive beam failure indications received by the MAC layer exceeds the maximum value (beam failure instance max count), the MAC layer determines that a beam failure has occurred. New candidate beam identification:

[0176] The physical layer of the terminal device measures the beam identification reference signal (BIR) to search for new candidate beams. When the physical layer of the terminal device receives a request, instruction, or notification from the terminal device's upper layer (MAC layer), it reports the measurement results of the BIR that meet preset conditions (for example, exceeding a preset threshold for Layer 1 reference signal received power (L1-RSRP)) to the upper layer. The upper layer of the terminal device selects a candidate beam based on the report from the physical layer.

[0177] Beam restoration request:

[0178] The higher layer (MAC layer) of the terminal device determines the physical random access channel (PRACH) resource / sequence based on the selected candidate beam. If the terminal device determines that the triggering condition of the beam failure recovery request (BFRQ) is met, the terminal device sends the above-mentioned BFRQ to the network device on the contention-free PRACH. The terminal needs to send the BFRQ according to the BFRQ transmission count and / or timer configured by the network.

[0179] Beam recovery response:

[0180] The terminal device starts monitoring the beam failure recovery response (BFRP) of the network device on the PDCCH 4 time slots after sending the PRACH. If no successful response is received from the network device before the beam failure recovery timer, the beam recovery failure indication is reported to the MAC layer.

[0181] Please refer to FIG3 , which is a schematic diagram of an implementation of a communication method provided in an embodiment of the present application. The method includes the following steps.

[0182] It should be noted that in Figure 3, the method is illustrated by using a terminal device and a network device as examples of the execution entities of the interaction diagram, but this application does not limit the execution entities of the interaction diagram. For example, in Figure 3, the execution entity of the method can be replaced by a chip, chip system, processor, logic module, or software in the terminal device or network device.

[0183] S301. The terminal device obtains first information, where the first information includes the signal quality of the wireless link between the terminal device and the network device, and / or the signal quality of the beam between the terminal device and the network device.

[0184] In one implementation, the signal quality of the wireless link between the terminal device and the network device and / or the signal quality of the beam can be obtained based on a reference signal.

[0185] The network equipment will configure each reference signal to the terminal device in the form of a resource. A resource is a configuration information unit, which usually includes parameters related to a reference signal, such as the time-frequency resource location of the reference signal, the number of ports, and the time domain type (periodic / semi-static / aperiodic). The terminal device measures the current serving cell based on the configuration information. If measurements of neighboring cells are required, the terminal device also measures neighboring cells based on the measurement configuration. The measurement report is obtained based on the measurement results of reference signals (such as SS / PBCH blocks, CSI-RS, etc.).

[0186] For example, when a terminal device and a network device communicate via a downlink, the reference signal may include CSI-RS, SSS, primary synchronization signal (PSS), cell specific reference signal (CRS), demodulation reference signal (DMRS), and synchronization system / physical broadcast channel block (SS / PBCH block). The SS / PBCH block may be referred to as SSB.

[0187] For example, when the terminal device and the network device communicate through the side link, the reference signal may include a sidelink synchronization signal / physical broadcast channel block (sidelink synchronization signal / physical broadcast channel block, sidelink SSB, SL-SSB, or S-SS / PSBCH block), a sidelink channel state information reference signal (sidelink channel state information reference signal, SL-CSI-RS), etc.

[0188] In this embodiment, the first information can be understood as the measurement result of the downlink reference signal, and can also be understood as the signal quality of the wireless link and / or the signal quality of the beam between the terminal device and the network device.

[0189] In this embodiment, a network device includes a first module and a second module for transmitting and receiving information. The first module and the second module differ in at least one of power consumption, hardware composition, and a waveform of a transmitted signal, with the power consumption of the first module being less than that of the second module. Correspondingly, a terminal device also includes a first module and a second module for transmitting and receiving information. The first module and the second module differ in at least one of power consumption, hardware composition, and a waveform of a transmitted signal, with the power consumption of the first module being less than that of the second module.

[0190] Optionally, the first module is a low power radio (LR) transceiver, which transmits and receives a first type of signal Type 1, which is a chirp signal, an on-off key (OOK) signal, or a passive reflection signal.

[0191] Optionally, the second module is a main radio (MR), which transmits and receives a second type of signal, namely, a Type 2 signal. The second type of signal is an orthogonal frequency division multiplexing (OFDM) signal or a discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) signal.

[0192] Since the waveforms and transmission powers of the first type of signal and the second type of signal are different, the coverage ranges of the first type of signal and the second type of signal may be different. The first type of signal is used to ensure cell coverage, that is, terminal devices within the cell coverage, whether they are in idle state (idle), inactive state (inactive) or connected state (connected), can receive the first type of signal. The second type of signal provides services for users with data transmission demands, and it is necessary to consider the state of the terminal device, that is, only consider terminal devices in a connected state, or terminal devices in an inactive state that support small packet data transmission. It should be understood that the transmission power adjusted by the network equipment only guarantees coverage for such users.

[0193] Under this architecture, the low-power transceiver of the network device is used to ensure coverage, so its transmission power is relatively fixed. The main transceiver of the network device is used to provide services to users, so its transmission power can be dynamically adjusted, such as based on the location of the terminal device, channel quality, data volume, etc.

[0194] In this architecture, for connected terminal devices, the network device primarily transmits and receives signals via the primary transceiver. Therefore, the signal used for radio link monitoring (RLM-RS) is measured based on the signal from the primary transceiver, such as the reference signal sent by the network device's primary transceiver.

[0195] It should be understood that in one example, during the evaluation period, the terminal device will perform measurements based on the configured measurement signal and estimate the block error rate of the PDCCH of the serving cell. Based on the estimation result, the physical layer will send an out-of-sync or in-sync indication to the MAC layer. Since the main transceiver on the network side is not necessarily transmitting at full power, that is, there may be power margin accordingly, the power margin of the network device also needs to be considered during wireless link monitoring, such as synchronization / out-of-sync judgment. In this regard, the terminal device will receive the second information from the network device. For details, please refer to the content of S302.

[0196] It should be understood that the execution order of S301 and S302 is not limited.

[0197] S302. The terminal device receives second information from the network device, where the second information is related to the power headroom of the network device.

[0198] Optionally, the second information indicates a range of the power headroom and / or whether the power headroom exists.

[0199] Optionally, the network device includes a first module and a second module for transmitting and receiving information. The first module and the second module differ in at least one of power consumption, hardware composition, and waveform of a transmitted signal, and the power consumption of the first module is less than the power consumption of the second module. The second information is related to a power headroom of the second module of the network device.

[0200] The power headroom is divided into the power headroom of the network device and the power headroom of the beam, which can be the same or different.

[0201] In one implementation, the terminal device may receive or update the second information based on one or more of the following methods.

[0202] Method 1: Based on SSB reception.

[0203] Optionally, SSB can be replaced by SSS, CSI-RS, or master information block (MIB).

[0204] Method 2: Based on SIB reception.

[0205] The network device sends an SIB to the terminal device, where the SIB carries the second information, and broadcasts the second information through the SIB.

[0206] Method 3: Based on DCI reception.

[0207] The network device sends a DCI to the terminal device, where the DCI carries the second information.

[0208] Optionally, the DCI may be replaced by a media access control element (MAC CE).

[0209] Method 4: Update based on indication of paging short message.

[0210] When the power headroom of the network device changes, the network device may update the second information through a paging message, which is carried by a short message scrambled based on a paging radio network temporary identifier (P-RNTI).

[0211] Optionally, the higher layer (MAC layer) of the terminal device may determine whether the network device has a power headroom or a range of a power headroom based on the out-of-sync indication and the indication of the existence of a power headroom reported by the physical layer.

[0212] S303. The terminal device performs beam failure monitoring and recovery, and / or wireless link monitoring and recovery according to the first information and the second information.

[0213] After the terminal device obtains the first information and the second information, the terminal device can perform beam failure monitoring and recovery, and / or wireless link monitoring and recovery based on the first information and the second information.

[0214] It should be understood that with respect to radio link failure and beam failure, in single-beam scenarios, beam failure is equivalent to radio link failure. In multi-beam scenarios, when the radio problem within the cell cannot be resolved through the recovery process, or the terminal device cannot find a suitable beam, and the connection between the terminal device and the network device cannot be successfully restored through the random access process of the beam, the radio link failure between the network device and the terminal device is determined. When the terminal device loses the connection to one beam but is able to switch to another beam and successfully perform random access, only a beam failure has occurred in this scenario.

[0215] The following describes the processes of wireless link monitoring and recovery and beam failure monitoring and recovery respectively.

[0216] 1. Wireless Link Monitoring and Recovery

[0217] In one implementation, the terminal device determines whether to send an out-of-sync indication based on the first information and the second information.

[0218] In this implementation, the first information includes the signal quality of the wireless link between the terminal device and the network device, and the second information includes whether the network device has power headroom and / or the range of the power headroom.

[0219] Optionally, the conditions for the terminal device to send an out-of-sync indication include one or more of the following information A to information B.

[0220] Information A: The signal quality of the wireless link between the terminal device and the network device is less than a first threshold.

[0221] Information B: The signal quality of the wireless link between the terminal device and the network device is less than a first threshold, and the network device has power headroom.

[0222] For information A and information B, in the wireless link monitoring process, if the BLER estimated by the terminal device for each RLM-RS within a preset time length T is greater than or equal to the preset threshold Qout (that is, the results of all measurement resources within the evaluation period are less than the threshold). The signal quality of the wireless link between the terminal device and the network device can be understood as the result of all measurement resources within the evaluation period. Correspondingly, the first threshold here can be understood as the threshold / threshold of the signal quality in the wireless link monitoring process. When the signal quality of the wireless link is less than the first threshold, it means that the signal quality of the wireless link is poor, which will trigger the physical layer of the terminal device to send an out-of-sync indication to the RRC layer.

[0223] It should be understood that the PDCCH block error rate is only one of the beam metrics compared with the preset threshold Qout,LR. In practical applications, other metrics may be selected for comparison based on actual needs. Regarding information B, the terminal device not only needs to determine the signal quality of the wireless link with the network device, but also considers whether the network device has power headroom. Only when the network device does not have power headroom will an out-of-sync indication be sent.

[0224] If the terminal device determines that the above-mentioned conditions for sending an out-of-sync indication are met, the physical layer of the terminal device sends an out-of-sync indication to the upper layer.

[0225] Optionally, the terminal device sends an out of sync indication and a power headroom exist (PH exist) indication to a higher layer, where PH exist is used to indicate that the network device has power headroom.

[0226] In another implementation, the terminal device determines whether to send an out-of-sync indication based on the first information.

[0227] If the terminal device determines that the signal quality of the wireless link between the terminal device and the network device is less than the first threshold, the physical layer of the terminal device will report an out-of-sync indication to the upper layer without considering the power margin of the network device.

[0228] After the physical layer of the terminal device sends an out-of-sync indication to the upper layer, in one implementation, when a first condition is met, the terminal device sends a first signal to the network device, and the first signal is used to trigger the network device to adjust the transmission power.

[0229] In this implementation, during the wireless link monitoring and recovery process, the terminal device sends a first signal to the network device when a first condition is met to trigger the network device to adjust the transmit power. The terminal device will only perform reconstruction if the first condition is not met.

[0230] Optionally, the first signal is an uplink wake up signal (UL WUS).

[0231] If the terminal device detects that an out-of-sync indication has been sent to the upper layer and the network device has power headroom, it may trigger the terminal device to send a first signal to the network device to request the network device to adjust the transmit power. However, in order to avoid the terminal device from frequently or unnecessarily sending UL WUS, which causes unnecessary waste of resources, it is necessary to limit the first condition. Optionally, as shown in Figure 4, the first condition includes one or more of the following information A to information B:

[0232] Information A: The terminal device continuously sends N out-of-sync indications to the upper layer, and the network device has power margin, N is less than N310, and N is a positive integer.

[0233] Information B: The terminal device continuously sends N310 out-of-sync indications to the upper layer, and the network device has power margin.

[0234] For information A, define counter N, and the constant value is less than N310. When the terminal device sends N out-of-sync indications to the upper layer continuously and the network device has power margin, the terminal device is triggered to send UL WUS, triggering the network device to adjust the transmission power.

[0235] It should be understood that after the terminal device sends N310 out-of-sync indications to the upper layer, it will start timer T310. In the condition of information A, the terminal device sets N to be less than N310, thereby omitting the start of timer T310 and avoiding triggering radio link failure.

[0236] For information B, if the terminal device detects that N310 out-of-sync indications have been sent to the upper layer continuously, T310 is started. At this time, if the network device has power margin, the terminal device is triggered to send UL WUS.

[0237] Optionally, the terminal device may determine N based on third information sent from the network device, where the third information is used to indicate a threshold N of the number of times the terminal device sends an out-of-sync indication.

[0238] In another implementation, the terminal device continuously sends N310 out-of-sync indications to the upper layer, and the network device has no power margin. The terminal device triggers a radio link failure and subsequent RRC re-establishment based on the out-of-sync indication.

[0239] Regarding the terminal device sending a first signal to the network device, in one implementation, the terminal device includes a first module and a second module for sending and receiving information, the first module and the second module differ in at least one of power consumption, hardware composition and waveform of the transmission signal, the power consumption of the first module is less than the power consumption of the second module, and the terminal device sends the first signal to the network device based on the first module.

[0240] When the terminal device sends a first signal to the network device based on the first module, the network device can receive the first signal based on the first module, and then adjust the transmission power of the second module of the network device according to the first signal.

[0241] It should be understood that the network device includes a first module and a second module for transmitting and receiving information. The first module and the second module differ in at least one of power consumption, hardware composition, and waveform of the transmitted signal, and the power consumption of the first module is less than that of the second module. In this scenario, the first module is used to ensure coverage and has a relatively fixed transmit power, while the second module is used to provide services to users and has a dynamically adjustable transmit power. Therefore, if the network device still has power headroom and is still within the coverage range of the first module, link recovery can be performed by triggering the network device to adjust its transmit power, thereby reducing unnecessary connection reestablishment.

[0242] Optionally, based on the network device including a first module and a second module for transmitting and receiving information, the terminal device also includes a first module and a second module for transmitting and receiving information. Accordingly, the terminal device can send a first signal to the network device based on the second module. The network device receives the first signal based on the first module and then adjusts the transmit power of the second module of the network device based on the first signal.

[0243] 2. Beam Failure Monitoring and Recovery

[0244] In one implementation, the terminal device determines whether to send a beam failure instance indication based on the first information and the second information.

[0245] In this implementation, the first information includes the signal quality of the first beam between the terminal device and the network device, and the second information includes whether the first beam has a power headroom and / or the range of the power headroom of the first beam. The first beam can be understood as the current beam used by the terminal device to communicate with the network device. When beam switching is performed, the terminal device switches the first beam to another beam.

[0246] It should be understood that the power headroom of a beam may be the same as or different from the power headroom of a network device. In this embodiment, considering that the current beam may not be transmitted at full power, resulting in beam failure, the power headroom of the current beam is used to determine beam failure and restore the beam during beam failure monitoring and recovery.

[0247] Optionally, the beam failure indication may also be referred to as a beam failure event indication or a beam failure instance indication.

[0248] Optionally, the conditions for the terminal device to send a beam failure indication include one or more of the following information A to information D.

[0249] Information A: The signal quality of the first beam is less than a third threshold.

[0250] Information B: The signal quality of the first beam is less than a third threshold, and the first beam has no power margin.

[0251] Information C: The signal quality of the first beam is less than a third threshold, and the signal quality of the candidate beam is greater than or equal to the third threshold.

[0252] Information D: The signal quality of the first beam is less than the third threshold, and the signal quality of the candidate beam is greater than or equal to the seventh threshold.

[0253] For information A, the terminal device does not consider the influence of the power margin of the beam when determining whether to send a beam failure indication.

[0254] For information C and information D, the thresholds for the signal quality of the first beam and the signal quality of the candidate beams may be the same or different.

[0255] For information A to information D, in the process of beam failure monitoring, the terminal device measures the beam failure detection reference signal at the physical layer and determines whether a beam failure event occurs based on the measurement results. For example, the block error rate of the PDCCH exceeds the preset threshold value Qout,LR. Correspondingly, the third threshold value can be understood as the threshold / threshold of the link quality in the beam failure monitoring process, and the signal quality of the first beam is less than the first threshold value, which can be understood as, for example, the block error rate of the PDCCH is greater than or equal to the preset threshold value Qout,LR. When the signal quality of the beam is less than the third threshold value, it indicates that the signal quality or link quality of the beam is poor, and triggers the terminal device to send a beam failure indication.

[0256] It should be understood that the block error rate of the PDCCH is only one of the indicators of the beam compared with the preset threshold Qout,LR. In actual application, other indicators can also be selected for comparison based on actual needs.

[0257] If the terminal device determines that the above-mentioned conditions for sending a beam failure indication are met, the physical layer of the terminal device sends a beam failure indication to the upper layer.

[0258] In another implementation, the terminal device determines whether to send a beam failure indication based on the first information.

[0259] If the terminal device determines that the signal quality of the first beam between the terminal device and the network device is less than the third threshold, the physical layer of the terminal device will report a beam failure indication to the upper layer without considering the power margin of the first beam.

[0260] It should be understood that the terminal device includes the power margin of the current beam as one of the conditions for sending a beam failure indication, so that when there is power margin in the current beam, it will prioritize restoring the current beam by triggering the network device to adjust the transmit power to reduce unnecessary beam switching processes.

[0261] After the physical layer of the terminal device sends a beam failure indication to the upper layer, in one implementation, when the second condition is met, the terminal device sends a first signal to the network device, and the first signal is used to trigger the network device to adjust the transmission power.

[0262] In this implementation, during the beam failure monitoring and recovery process, the terminal device sends a first signal to the network device when the second condition is met to trigger the network device to adjust the transmit power. If the second condition is not met, the terminal device performs random access.

[0263] Optionally, the first signal is an uplink wake up signal (UL WUS).

[0264] Optionally, the second condition includes one or more of the following information A to information E.

[0265] Information A: The number of beam failure indications is equal to the second threshold, and there is a power margin in the first beam.

[0266] Information B: The signal quality of the first beam is less than the third threshold, there is a power margin in the first beam, and the second threshold is less than the third threshold.

[0267] Information C: The sum of the signal quality of the first beam and the power margin of the first beam is greater than or equal to a fourth threshold.

[0268] Information D: The signal quality of the first beam is less than the fifth threshold, and the sum of the signal quality of the first beam and the power headroom of the first beam is greater than or equal to the sixth threshold.

[0269] Information E: The signal quality of the candidate beam is less than the fifth threshold, and the sum of the signal quality of the candidate beam and the power margin of the candidate beam is greater than or equal to the sixth threshold.

[0270] Information A corresponds to the beam failure monitoring process. The network side configures the maximum number of consecutive beam failure indications received by the MAC layer for the terminal (beam failure instance max count). In this embodiment, the second threshold corresponds to the number of consecutive beam failure indications received by the MAC layer. The value of the second threshold is set to be less than the maximum value. Before the number of beam failure indications reaches the maximum value and the beam failure is determined, the process of recovering the first beam is executed in advance. On this basis, when the terminal device determines that the first beam has power headroom, the terminal device is triggered to send a first signal to the network device, triggering the network device to adjust the transmit power to prevent the first beam from being switched.

[0271] For information B, "the signal quality of the first beam is less than the third threshold" can be replaced by "the signal quality of the first beam is detected to be less than the third threshold for M consecutive times." It should be understood that only when there is no power headroom in the first beam and the signal quality of the first beam is less than the third threshold will the terminal device trigger the transmission of a beam failure indication to the MAC layer. The third threshold can be understood as a threshold value for signal quality. When the signal quality is less than the third threshold, it indicates that the signal quality of the first beam is poor.

[0272] Information C, D, and E all correspond to the process of identifying new candidate beams. In the process of identifying new candidate beams, the physical layer of the terminal device reports the measurement results that exceed the L1-RSRP threshold to the upper layer.

[0273] Corresponding to information C, the fourth threshold may correspond to the L1-RSRP threshold.

[0274] Compared to selecting candidate beams directly based on the measurement results of the reference signal, in this embodiment, in addition to considering the measurement results of the reference signal (i.e., the signal quality of the first beam), the power margin of the first beam is also considered. When the conditions of information C are met, the terminal device is triggered to send a first signal to the network device, instead of directly reporting the measurement results greater than or equal to the threshold to the upper layer, so that before the candidate beam is identified, the network device is triggered to adjust the transmit power to try to restore the connection of the first beam. If the signal quality of the first beam meets the conditions after the network device adjusts the transmit power, the terminal device and the network device can continue to communicate based on the first beam without having to switch the first beam to other beams, thereby avoiding beam switching, further reducing network energy consumption, and reducing energy consumption loss. Corresponding to information D, the fifth threshold can correspond to L1-RSRP, or reference signal received quality (RSRQ), or signal to interference and noise ratio (SINR) or signal-to-noise ratio (SNR) threshold. The sixth threshold may correspond to a threshold of L1-RSRP, or RSRQ, or SINR, or SNR.

[0275] In information E, the terminal device primarily determines the signal quality and power margin of the candidate beam to determine whether the candidate beam, after adjusting its transmit power, has better channel quality than the current first beam. It should be understood that different beams are associated with different first signals, which include beam indices corresponding to different beams.

[0276] Optionally, when the signal quality of the candidate beam is greater than a sixth threshold, the terminal device is triggered to initiate random access.

[0277] For information C, D, and E, when the signal quality of the candidate beam is greater than or equal to the fifth threshold, random access of the terminal device is triggered.

[0278] In one possible implementation, when the third condition is met, the terminal device sends a second signal to the network device, where the second signal is used to switch from the first beam to the candidate beam. Optionally, the third condition includes:

[0279] The sum of the signal quality of the first beam and the power headroom of the first beam is less than a fourth threshold, and the sum of the signal quality of the candidate beam and the power headroom of the candidate beam is greater than or equal to the fourth threshold.

[0280] It should be understood that the terminal device includes the power margin of the first beam as one of the conditions for beam switching. When the sum of the signal quality of the first beam and the power margin of the first beam is less than the fourth threshold, it means that adjusting the transmission power of the first beam can no longer restore the first beam. In this case, beam switching is performed, thereby reducing unnecessary beam recovery and switching processes.

[0281] In a scenario where both the terminal device and the network device include a first module and a second module for sending and receiving information, taking the first module as a low-power transceiver and the second module as a main transceiver as an example, since the transmission power of the main transceiver of the network device is dynamically adjustable, the terminal device may be out of the coverage of the main transceiver of the network device due to the movement of the user, and beam failure may be triggered at this time. However, in this scenario, the optimal beam of the terminal device may still be the current beam, so the power margin of the current beam needs to be considered.

[0282] Since the transmission power of the main transceiver of the network device can be dynamically adjusted, as shown in Figure 5, taking the terminal device as a UE as an example, there are two potential beam failure scenarios.

[0283] Case 1: Switching to the target beam. The UE moves to another beam, which means that the optimal beam is changed, resulting in beam failure.

[0284] Case 2: The transmit power of the original beam is increased. The UE does not move to another beam, meaning the optimal beam remains the current one. However, the beam fails because the current beam is not transmitting at full power.

[0285] For the beam failure monitoring and recovery in the above two scenarios, this embodiment enhances the beam failure monitoring and recovery process by combining the beam power margin to avoid unnecessary beam switching. The process is described in detail below in conjunction with the above content.

[0286] 1. Beam failure monitoring

[0287] When the signal quality of the first beam is less than the second threshold, the physical layer of the terminal device will send a beam failure indication to the MAC layer. In this embodiment, there are several possible implementations of beam failure monitoring:

[0288] (1) If the signal quality of the first beam is less than a third threshold, the terminal device is triggered to send a beam failure indication.

[0289] In this implementation, when the number of beam failure indications reaches a second threshold, if there is power headroom in the first beam, the terminal device is triggered to send a first signal and reset the timer. When the number of beam failure indications reaches a third threshold, the terminal device is triggered to perform random access.

[0290] (2) If the signal quality of the first beam is less than the third threshold and there is no power margin in the first beam, the terminal device is triggered to send a beam failure indication.

[0291] In this implementation, when the signal quality of the first beam is less than a third threshold (or the signal quality of the first beam is detected to be less than the third threshold for M consecutive times), and if the first beam has power headroom, the terminal device is triggered to send a first signal to the network device. Only when the first beam does not have power headroom, and if the signal quality of the first beam is less than the third threshold, is the terminal device triggered to send a beam failure indication to the MAC layer.

[0292] (3) If the signal quality of the first beam is less than the third threshold, and the signal quality of the candidate beam is greater than or equal to the third threshold, the terminal device is triggered to send a beam failure indication.

[0293] In this implementation, the terminal device determines whether to send a beam failure indication based on the signal quality of the first beam and the signal quality of the candidate beam, without considering whether there is power margin in the first beam.

[0294] (4) If the signal quality of the first beam is less than the third threshold and the signal quality of the candidate beam is greater than or equal to the seventh threshold, the terminal device is triggered to send a beam failure indication.

[0295] 2. Identification of new candidate beams

[0296] In this embodiment, in addition to considering the signal quality of the beam, the power margin of the beam is also considered. Accordingly, there are several possible implementation methods for identifying new candidate beams:

[0297] (1) If the sum of the signal quality of the first beam and the power margin of the first beam is greater than or equal to a fourth threshold, the terminal device is triggered to send a first signal.

[0298] (2) If the sum of the signal quality of the first beam and the power margin of the first beam is less than a fourth threshold, and the sum of the signal quality of the candidate beam and the power margin of the candidate beam is greater than or equal to the fourth threshold, beam switching is performed.

[0299] (3) If the signal quality of the first beam is less than the fifth threshold, and the sum of the signal quality of the first beam and the power margin of the first beam is greater than or equal to the sixth threshold, the terminal device is triggered to send the first signal.

[0300] (4) If the signal quality of the candidate beam is less than the fifth threshold, and the sum of the signal quality of the candidate beam and the power margin of the candidate beam is greater than or equal to the sixth threshold, random access of the terminal device is triggered.

[0301] (5) If the signal quality of the candidate beam is greater than or equal to the sixth threshold, random access of the terminal device is triggered.

[0302] It should be understood that different beams are associated with different first signals, and the first signal includes index information of the beam.

[0303] Regarding the terminal device sending a first signal to the network device, in one implementation, the terminal device includes a first module and a second module for sending and receiving information, the first module and the second module differ in at least one of power consumption, hardware composition and waveform of the transmission signal, the power consumption of the first module is less than the power consumption of the second module, and the terminal device sends the first signal to the network device based on the first module.

[0304] When the terminal device sends a first signal to the network device based on the first module, the network device can receive the first signal based on the first module, and then adjust the transmission power of the second module of the network device according to the first signal.

[0305] 3. Beam recovery request

[0306] The first scenario (Case 1) and the second scenario (Case 2) described above correspond to beam switching and increasing the transmit power of the original beam, respectively. In the first scenario, the terminal device sends a second signal to the network device to switch from the first beam to the candidate beam. In the second scenario, the terminal device sends a first signal to the network device to trigger the network device to adjust the transmit power.

[0307] Optionally, at least one of the resources, waveforms, and sequences of the first signal and the second signal is different. The terminal device can use one or more of different resources (time-frequency resources), waveforms (different signals), or sequences (different preamble sequences) to perform a beam recovery request based on different scenarios, so as to preferentially adjust the wireless link quality by adjusting the transmit power of the network device to ensure the availability of the connection / beam.

[0308] Correspondingly, in the beam restoration request phase, the beam restoration requests for these two scenarios can be distinguished through different signals or resources.

[0309] The following describes the process of beam recovery request based on different signals and resources.

[0310] (1) Based on different signals

[0311] In this implementation, different signals are configured for the above two scenarios.

[0312] For example, in case 1, the terminal device's upper layer configures a dedicated random access channel (RACH) Type 1, and the terminal device sends a second signal to the network device. In case 2, the terminal device's upper layer configures a first signal, and the terminal device sends the first signal to the network device.

[0313] (2) Based on different resources

[0314] In this implementation, for the above two scenarios, the configured signals are the same, but the resources are different.

[0315] For example, in case 1, the terminal device's upper layer configures a dedicated RACH Type 1. To increase the transmit power of the original beam, the upper layer also configures a dedicated RACH Type 1. However, the preamble sequences associated with the RACH resources for different purposes are different, i.e., they are distinguished by different sequences. In case 2, the terminal device's upper layer configures a dedicated RACH Type 2. RACH Type 2 and RACH Type 1 are associated with different RACH resources, such as time-frequency domain resources and sequence length.

[0316] Optionally, RACH Type 1 or RACH Type 2 may include one or more preambles. When multiple different preamble sequences are included, different preambles may be associated with different powers.

[0317] 4. Beam recovery response

[0318] For the first scenario (Case 1) and the second scenario (Case 2), which correspond to beam switching and increasing the transmit power of the original beam, respectively, the beam recovery response is handled differently in the beam recovery response phase.

[0319] For case 1, if the terminal device initiates random access based on RACH Type 1 and does not receive a successful response from the network device before the timer (beam failure recovery timer), the physical layer of the terminal device will report a beam recovery request failure indication to the higher layer of the terminal device.

[0320] For case 2, if the terminal device initiates random access based on RACH Type 2 or triggers the terminal device to send a first signal, if the terminal device does not detect that the transmit power of the network device is adjusted within the first time period (or before the timer (beam failure recovery timer)), or the terminal device detects that the transmit power of the network device is adjusted within the first time period, the signal quality of the first beam is less than the third threshold, the terminal device sends a beam recovery request failure indication to the upper layer.

[0321] Regarding the first to seventh thresholds mentioned in this embodiment, optionally, the terminal device can determine the first threshold, the second threshold, the third threshold, the fourth threshold, the fifth threshold, the sixth threshold and the seventh threshold based on the fourth information from the network device configuration.

[0322] Among them, the fourth information is used to configure at least one of the following information: a first threshold corresponding to the signal quality of the wireless link, a second threshold corresponding to the number of beam failure indications, a third threshold corresponding to the signal quality of the first beam, a fourth threshold corresponding to the sum of the signal quality of the first beam and the power margin of the first beam, a fifth threshold corresponding to the signal quality of the first beam, a fifth threshold corresponding to the signal quality of the candidate beam, a sixth threshold corresponding to the sum of the signal quality of the candidate beam and the power margin of the candidate beam, or a seventh threshold corresponding to the signal quality of the candidate beam.

[0323] Optionally, the fourth information may be carried by at least one of the following: system message, RRC signaling, MAC CE or predefined.

[0324] It should be understood that during the wireless link monitoring and recovery, and / or beam failure monitoring and recovery process, the transmit power of the network device is adjusted in combination with the power margin of the network device, and the wireless link quality is adjusted preferentially by adjusting the network side transmit power to ensure the availability of the connection or beam, thereby reducing unnecessary RRC connection reconstruction and random access / beam recovery processes initiated by beam failure.

[0325] Referring to Figure 6, an embodiment of the present application provides a communication device 600. This communication device 600 can implement the functions of the terminal device or network device in the above method embodiment, thereby also achieving the beneficial effects of the above method embodiment. In this embodiment of the present application, the communication device 600 can be a terminal device (or network device), or it can be an integrated circuit or component, such as a chip, within the terminal device (network device).

[0326] It should be noted that the communication device 600 may include a sending unit and a receiving unit, which are respectively used to perform sending and receiving.

[0327] In one possible implementation, when the apparatus 600 is used to execute the method executed by the terminal device in the aforementioned embodiment, the apparatus 600 includes a processing unit 601 and a transceiver unit 602. The processing unit 601 is configured to obtain first information, where the first information includes the signal quality of the wireless link with the network device and / or the signal quality of the beam with the network device; the transceiver unit 602 is configured to receive second information from the network device, where the second information is related to the power headroom of the network device; and the processing unit 601 is further configured to perform beam failure monitoring and recovery, and / or wireless link monitoring and recovery, based on the first and second information.

[0328] In one possible implementation, when the device 600 is used to execute the method executed by the network device in the aforementioned embodiment, the device 600 includes a transceiver unit 602; the transceiver unit 602 is used to send second information to the terminal device, and the second information is related to the power margin of the second module of the network device.

[0329] It should be noted that, for details on the information execution process of the units of the above-mentioned communication device 600, please refer to the description in the method embodiment shown above in this application, and no further details will be given here.

[0330] Please refer to Fig. 7, which is another schematic structural diagram of a communication device 700 provided in this application. The communication device 700 includes a logic circuit 701 and an input / output interface 702. The communication device 700 may be a chip or an integrated circuit.

[0331] The transceiver unit 602 shown in FIG6 may be a communication interface, which may be the input / output interface 702 in FIG7 , which may include an input interface and an output interface. Alternatively, the communication interface may be a transceiver circuit, which may include an input interface circuit and an output interface circuit.

[0332] Optionally, the logic circuit 701 is used to obtain first information, which includes the signal quality of the wireless link between the network device and / or the signal quality of the beam between the network device; the input and output interface 702 is used to receive second information from the network device, which is related to the power margin of the network device; the logic circuit 701 is also used to perform beam failure monitoring and recovery, and / or wireless link monitoring and recovery based on the first information and the second information.

[0333] Optionally, the input / output interface 702 is used to send second information to the terminal device, where the second information is related to the power headroom of the second module of the network device.

[0334] The logic circuit 701 and the input / output interface 702 may also execute other steps executed by the terminal device or the network device in any embodiment and achieve corresponding beneficial effects, which will not be described in detail here.

[0335] In a possible implementation, the processing unit 601 shown in FIG. 6 may be the logic circuit 701 in FIG. 7 .

[0336] Optionally, the logic circuit 701 may be a processing device, and the functions of the processing device may be partially or entirely implemented by software. The functions of the processing device may be partially or entirely implemented by software.

[0337] Optionally, the processing device may include a memory and a processor, wherein the memory is used to store a computer program, and the processor reads and executes the computer program stored in the memory to perform corresponding processing and / or steps in any one of the method embodiments.

[0338] Optionally, the processing device may include a processor. A memory for storing the computer program is located outside the processing device, and the processor is connected to the memory via circuits / wires to read and execute the computer program stored in the memory. The memory and processor may be integrated or physically separate.

[0339] Optionally, the processing device may be one or more chips, or one or more integrated circuits. For example, the processing device may be one or more field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), system-on-chips (SoCs), central processor units (CPUs), network processors (NPs), digital signal processors (DSPs), microcontroller units (MCUs), programmable logic devices (PLDs), or other integrated chips, or any combination of the above chips or processors.

[0340] Please refer to Figure 8, which shows the communication device 800 involved in the above-mentioned embodiments provided in an embodiment of the present application. The communication device 800 can specifically be a communication device serving as a terminal device in the above-mentioned embodiments. The example shown in Figure 8 is that the terminal device is implemented through the terminal device (or a component in the terminal device).

[0341] Herein, a possible logical structure diagram of the communication device 800 is shown. The communication device 800 may include but is not limited to at least one processor 801 and a communication port 802 .

[0342] The transceiver unit 602 shown in FIG6 may be a communication interface, which may be the communication port 802 in FIG8 , which may include an input interface and an output interface. Alternatively, the communication port 802 may be a transceiver circuit, which may include an input interface circuit and an output interface circuit.

[0343] Further optionally, the device may also include at least one of a memory 803 and a bus 804. In an embodiment of the present application, the at least one processor 801 is used to control and process the actions of the communication device 800.

[0344] Furthermore, the processor 801 may be a central processing unit (CPU), a general-purpose processor (GPPC), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic device (PLD), a transistor logic device (TLD), a hardware component, or any combination thereof. It may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like. Those skilled in the art will clearly understand that, for ease and brevity of description, the specific operating processes of the systems, devices, and units described above may refer to the corresponding processes in the aforementioned method embodiments and will not be further described herein.

[0345] It should be noted that the communication device 800 shown in Figure 8 can be specifically used to implement the steps implemented by the terminal device in the aforementioned method embodiment and achieve the corresponding technical effects of the terminal device. The specific implementation methods of the communication device shown in Figure 8 can refer to the description in the aforementioned method embodiment and will not be repeated here.

[0346] Please refer to Figure 9, which is a structural diagram of the communication device 900 involved in the above-mentioned embodiments provided in an embodiment of the present application. The communication device 900 can specifically be a communication device as a network device in the above-mentioned embodiments. The example shown in Figure 9 is that the network device is implemented through the network device (or a component in the network device), wherein the structure of the communication device can refer to the structure shown in Figure 9.

[0347] The communication device 900 includes at least one processor 911 and at least one network interface 914. Further optionally, the communication device also includes at least one memory 912, at least one transceiver 913 and one or more antennas 915. The processor 911, the memory 912, the transceiver 913 and the network interface 914 are connected, for example, via a bus. In an embodiment of the present application, the connection may include various interfaces, transmission lines or buses, etc., which are not limited in this embodiment. The antenna 915 is connected to the transceiver 913. The network interface 914 is used to enable the communication device to communicate with other communication devices through a communication link. For example, the network interface 914 may include a network interface between the communication device and the core network device, such as an S1 interface, and the network interface may include a network interface between the communication device and other communication devices (such as other network devices or core network devices), such as an X2 or Xn interface.

[0348] The transceiver unit 602 shown in FIG6 may be a communication interface, which may be the network interface 914 in FIG9 , which may include an input interface and an output interface. Alternatively, the network interface 914 may be a transceiver circuit, which may include an input interface circuit and an output interface circuit.

[0349] Processor 911 is primarily used to process communication protocols and communication data, control the entire communication device, execute software programs, and process software program data, for example, to support the communication device in performing the actions described in the embodiments. The communication device may include a baseband processor and a central processing unit. The baseband processor is primarily used to process communication protocols and communication data, while the central processing unit is primarily used to control the entire terminal device, execute software programs, and process software program data. Processor 911 in Figure 9 may integrate the functions of both a baseband processor and a central processing unit. Those skilled in the art will appreciate that the baseband processor and the central processing unit may also be independent processors interconnected via a bus or other technology. Those skilled in the art will appreciate that a terminal device may include multiple baseband processors to accommodate different network standards, multiple central processing units to enhance its processing capabilities, and various components of the terminal device may be connected via various buses. The baseband processor may also be referred to as a baseband processing circuit or a baseband processing chip. The central processing unit may also be referred to as a central processing circuit or a central processing chip. The functionality for processing communication protocols and communication data may be built into the processor or stored in memory as a software program, which is executed by the processor to implement the baseband processing functionality.

[0350] The memory is primarily used to store software programs and data. Memory 912 can exist independently and be connected to processor 911. Alternatively, memory 912 and processor 911 can be integrated together, for example, within a single chip. Memory 912 can store program code for executing the technical solutions of the embodiments of the present application, and execution is controlled by processor 911. The various computer program codes executed can also be considered drivers for processor 911.

[0351] Figure 9 shows only one memory and one processor. In an actual terminal device, there may be multiple processors and multiple memories. The memory may also be referred to as a storage medium or a storage device. The memory may be a storage element on the same chip as the processor, i.e., an on-chip storage element, or an independent storage element, which is not limited in the present embodiment.

[0352] The transceiver 913 can be used to support the reception or transmission of radio frequency signals between the communication device and the terminal, and the transceiver 913 can be connected to the antenna 915. The transceiver 913 includes a transmitter Tx and a receiver Rx. Specifically, one or more antennas 915 can receive radio frequency signals. The receiver Rx of the transceiver 913 is used to receive the radio frequency signal from the antenna, convert the radio frequency signal into a digital baseband signal or a digital intermediate frequency signal, and provide the digital baseband signal or digital intermediate frequency signal to the processor 911 so that the processor 911 can further process the digital baseband signal or digital intermediate frequency signal, such as demodulation and decoding. In addition, the transmitter Tx in the transceiver 913 is also used to receive a modulated digital baseband signal or digital intermediate frequency signal from the processor 911, convert the modulated digital baseband signal or digital intermediate frequency signal into a radio frequency signal, and send the radio frequency signal through one or more antennas 915. Specifically, the receiver Rx can selectively perform one or more stages of down-mixing and analog-to-digital conversion on the RF signal to obtain a digital baseband signal or a digital intermediate frequency signal. The order of the down-mixing and analog-to-digital conversion processes is adjustable. The transmitter Tx can selectively perform one or more stages of up-mixing and digital-to-analog conversion on the modulated digital baseband signal or digital intermediate frequency signal to obtain a RF signal. The order of the up-mixing and digital-to-analog conversion processes is adjustable. The digital baseband signal and the digital intermediate frequency signal may be collectively referred to as digital signals.

[0353] The transceiver 913 may also be referred to as a transceiver unit, a transceiver, a transceiver device, etc. Optionally, a device in the transceiver unit that implements a receiving function may be referred to as a receiving unit, and a device in the transceiver unit that implements a transmitting function may be referred to as a transmitting unit. That is, the transceiver unit includes a receiving unit and a transmitting unit. The receiving unit may also be referred to as a receiver, an input port, a receiving circuit, etc., and the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0354] It should be noted that the communication device 900 shown in Figure 9 can be specifically used to implement the steps implemented by the network device in the aforementioned method embodiment and achieve the corresponding technical effects of the network device. The specific implementation methods of the communication device 900 shown in Figure 9 can refer to the description in the aforementioned method embodiment and will not be repeated here.

[0355] Please refer to FIG10 , which is a schematic structural diagram of the communication device involved in the above-mentioned embodiment provided in an embodiment of the present application.

[0356] It can be understood that the communication device 100 includes, for example, modules, units, elements, circuits, or interfaces, which are appropriately configured together to implement the technical solutions provided in this application. The communication device 100 can be the terminal device or network device described above, or a component (such as a chip) in these devices, used to implement the method described in the following method embodiment. The communication device 100 includes one or more processors 101. The processor 101 can be a general-purpose processor or a dedicated processor. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control the communication device (such as a RAN node, terminal, or chip, etc.), execute software programs, and process data of software programs.

[0357] Optionally, in one design, the processor 101 may include a program 103 (sometimes also referred to as code or instructions), which may be executed on the processor 101 to cause the communication device 100 to perform the methods described in the following embodiments. In yet another possible design, the communication device 100 includes circuitry (not shown in FIG10 ).

[0358] Optionally, the communication device 100 may include one or more memories 102 on which a program 104 (sometimes also referred to as code or instructions) is stored. The program 104 can be run on the processor 101, so that the communication device 100 executes the method described in the above method embodiment.

[0359] Optionally, the processor 101 and / or the memory 102 may include an AI module 107, 108, which is used to implement AI-related functions. The AI ​​module may be implemented through software, hardware, or a combination of software and hardware. For example, the AI ​​module may include a wireless intelligent control (RIC) module. For example, the AI ​​module may be a near-real-time RIC or a non-real-time RIC.

[0360] Optionally, data may be stored in the processor 101 and / or the memory 102. The processor and the memory may be provided separately or integrated together.

[0361] Optionally, the communication device 100 may further include a transceiver 105 and / or an antenna 106. The processor 101 may also be sometimes referred to as a processing unit, and controls the communication device (e.g., a RAN node or terminal). The transceiver 105 may also be sometimes referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, and is configured to implement the transceiver functions of the communication device through the antenna 106.

[0362] The processing unit 601 shown in FIG6 may be the processor 101. The transceiver unit 602 shown in FIG6 may be a communication interface, which may be the transceiver 105 shown in FIG10 . The transceiver 105 may include an input interface and an output interface. Alternatively, the transceiver 105 may be a transceiver circuit, which may include an input interface circuit and an output interface circuit.

[0363] An embodiment of the present application further provides a computer-readable storage medium, which is used to store one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes the method described in the possible implementation methods of the first communication device or the second communication device in the aforementioned embodiment.

[0364] An embodiment of the present application also provides a computer program product (or computer program). When the computer program product is executed by the processor, the processor executes the method that may be implemented by the above-mentioned first communication device or second communication device.

[0365] An embodiment of the present application also provides a chip system, which includes at least one processor for supporting a communication device to implement the functions involved in the possible implementation methods of the above-mentioned communication device. Optionally, the chip system also includes an interface circuit, which provides program instructions and / or data to the at least one processor. In one possible design, the chip system may also include a memory, which is used to store the necessary program instructions and data for the communication device. The chip system can be composed of chips, or it can include chips and other discrete devices, wherein the communication device can specifically be the first communication device or the second communication device in the aforementioned method embodiment.

[0366] An embodiment of the present application further provides a communication system, wherein the network system architecture includes the first communication device and the second communication device in any of the above embodiments.

[0367] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0368] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0369] In addition, the functional units in the various embodiments of the present application can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit. If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the contributing part or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the various embodiments of the present application. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

Claims

1. A communication method, characterized in that, The method is applied to a terminal device, and the method includes: Obtaining first information, where the first information includes the signal quality of a wireless link with a network device and / or the signal quality of a beam with the network device; Receiving second information from the network device, where the second information is related to the power headroom of the network device; Performing beam failure monitoring and recovery, and / or wireless link monitoring and recovery according to the first information and the second information.

2. The method according to claim 1, characterized in that Performing wireless link monitoring and recovery according to the first information and the second information includes: When a first condition is met, sending a first signal to the network device, where the first signal is used to trigger the network device to adjust its transmission power.

3. The method according to claim 2, wherein The first condition includes at least one of the following: Continuously sending N out-of-sync indications to a higher layer, and the network device has the power headroom, N is less than N310, and N is a positive integer; or, Continuously sending N310 out-of-sync indications to the higher layer, and the network device has the power headroom.

4. The method according to claim 3, wherein The conditions for sending the out-of-sync indication include at least one of the following: The signal quality of the wireless link is less than a first threshold; or, The signal quality of the wireless link is less than the first threshold, and the network device has the power headroom.

5. The method according to any one of claims 2 to 4, characterized in that The terminal device includes a first module and a second module for transmitting and receiving information. At least one of the power consumption, hardware composition, and waveform of the transmitted signal of the first module and the second module is different, and the power consumption of the first module is less than that of the second module. Sending the first signal to the network device includes: Sending the first signal to the network device based on the first module.

6. The method according to any one of claims 1 to 5, characterized in that Performing beam failure monitoring and recovery according to the first information and the second information includes: When a second condition is met, sending a first signal to the network device, where the first signal is used to trigger the network device to adjust its transmission power.

7. The method according to claim 6, wherein The second condition includes at least one of the following: The number of beam failure indications is equal to a second threshold, and the first beam has the power headroom; or, The signal quality of the first beam is less than a third threshold, and the first beam has the power headroom, and the second threshold is less than the third threshold; or, The sum of the signal quality of the first beam and the power headroom of the first beam is greater than or equal to a fourth threshold; or, The signal quality of the first beam is less than a fifth threshold, and the sum of the signal quality of the first beam and the power headroom of the first beam is greater than or equal to a sixth threshold; Or, The signal quality of a candidate beam is less than a fifth threshold, and the sum of the signal quality of the candidate beam and the power headroom of the candidate beam is greater than or equal to a sixth threshold.

8. The method according to claim 7, wherein The condition for sending a beam failure indication is: The signal quality of the first beam is less than a third threshold; or, The signal quality of the first beam is less than the third threshold, and the first beam does not have the power headroom; or, The signal quality of the first beam is less than the third threshold, and the signal quality of a candidate beam is greater than or equal to the third threshold; or, The signal quality of the first beam is less than the third threshold, and the signal quality of the candidate beam is greater than or equal to the seventh threshold.

9. The method according to any one of claims 1 to 5, characterized in that, Performing beam failure monitoring and recovery according to the first information and the second information includes: When a third condition is met, sending a second signal to the network device, where the second signal is used to switch from the first beam to the candidate beam.

10. The method according to claim 9, characterized in that, The third condition includes: The sum of the signal quality of the first beam and the power margin of the first beam is less than the fourth threshold, and the sum of the signal quality of the candidate beam and the power margin of the candidate beam is greater than or equal to the fourth threshold.

11. The method according to any one of claims 6 to 10, characterized in that, At least one of the resources, waveforms, and sequences of the first signal and the second signal is different.

12. The method according to any one of claims 1 to 11, characterized in that, It further includes: If the transmission power of the network device is not detected to be adjusted within a first time period, or if the signal quality of the first beam is less than the third threshold after the transmission power of the network device is detected to be adjusted within the first time period, sending a beam recovery request failure indication to a higher layer.

13. A communication method, characterized in that, The method is applied to a network device, the network device includes a first module and a second module for transmitting and receiving information, at least one of the first module and the second module is different in power consumption, hardware composition, and waveform of the transmitted signal, the power consumption of the first module is less than the power consumption of the second module, and the method includes: Sending second information to the terminal device, where the second information is related to the power margin of the second module of the network device.

14. The method according to claim 13, wherein It further includes: Receiving a first signal from the terminal device; Adjusting the transmission power of the second module of the network device according to the first signal.

15. The method according to claim 13, characterized in that, Receiving the first signal from the terminal device includes: Receiving the first signal from the terminal device based on the first module.

16. The method according to any one of claims 13 to 15, characterized in that, It further includes: Sending third information to the terminal device, where the third information is used to indicate a threshold N for the number of out-of-sync indications sent by the terminal device, N is related to a first condition for the terminal device to send the first signal, and N is less than or equal to N310.

17. The method according to any one of claims 13 to 16, characterized in that, It further includes: Sending fourth information to the terminal device, where the fourth information is used to configure at least one of the following information: A first threshold for the signal quality of a radio link; or, A second threshold for the number of beam failure indications; or, A third threshold for the signal quality of the first beam; or, A fourth threshold for the sum of the signal quality of the first beam and the power margin of the first beam; or, A fifth threshold for the signal quality of the first beam; Or, A fifth threshold for the signal quality of the candidate beam; or, A sixth threshold for the sum of the signal quality of the candidate beam and the power margin of the candidate beam; or, A seventh threshold for the signal quality of the candidate beam.

18. The method according to any one of claims 13 to 17, characterized in that It further includes: Receiving a second signal from the terminal device; Switching from the first beam to the candidate beam according to the second signal.

19. A communication device, characterized in that, Includes a module for performing the method according to any one of claims 1 to 18.

20. A communication device, characterized in that, Includes at least one processor, the at least one processor is coupled to a memory; the at least one processor is used to perform the method according to any one of claims 1 to 18.

21. The communication device according to claim 20, wherein, The communication device is a chip or a chip system.

22. A readable storage medium, characterized in that, The storage medium stores a computer program or instructions, and when the computer program or instructions are executed by a communication device, the method described in any one of claims 1 to 18 is implemented.

23. A computer program product, characterized in that, It includes a computer program or instructions, and when the computer program or instructions run on a computer, the method described in any one of claims 1 to 18 is implemented.

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