Communication method and related device

Abstract

Disclosed are a communication method and a related device, the method comprising: a terminal device obtaining first information, the first information comprising a measurement result of at least one cell; the terminal equipment receives second information, wherein the second information is related to the power headroom of the at least one cell; when the first information and the second information satisfy a first condition, the terminal device sends a first signal to the target cell, the first signal being used for triggering the target cell to adjust the transmitting power; and when the first information and the second information meet a second condition, the terminal equipment initiates random access to the target cell, so that the failure rate of cell switching can be reduced, and the network energy consumption is reduced.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to a communication method and related devices. Background Art

[0002] With the continuous expansion of the network scale, the network energy consumption is also continuously increasing. During the communication process between a terminal device and a network device, situations such as cell handover failure may occur. In this regard, the terminal device can determine whether to perform a cell handover based on the measurement results of signals. However, in a scenario where the transmit power of the network device can be dynamically adjusted, if it is directly determined whether to perform a cell handover based on the measurement results of the signal, the failure rate of cell handover may increase. Summary of the Invention

[0003] This application provides a communication method and related devices, which can reduce the failure rate of cell handover and reduce the network energy consumption.

[0004] In the first aspect of this application, a communication method is provided. This method is executed by a terminal device, or by some components in the terminal device (such as a processor, a chip, or a chip system, etc.), or the terminal device can be a logic module or software that can implement all or part of the communication device functions. In this method, the terminal device obtains first information, and the first information includes measurement results of at least one cell; the terminal device receives second information, and the second information is related to the power headroom of at least one cell; when the first information and the second information meet a first condition, the terminal device sends a first signal to a target cell, and the first signal is used to trigger the target cell to adjust its transmit power; when the first information and the second information meet a second condition, the terminal device initiates a random access to the target cell.

[0005] Based on the above technical solution, in order to reduce the probability of handover failure and improve the reliability of handover, when the terminal device determines whether to perform a cell handover, it simultaneously considers the measurement results of the cell and the power headroom of the cell. When the terminal device determines that the first condition is met, it triggers the target cell to adjust its transmit power, so as to avoid the problem of handover failure caused by the terminal device performing a cell handover when there is power headroom in the target cell but the transmit power is not sufficient to cover the terminal device, thereby reducing the failure rate of cell handover and also reducing the network energy consumption. On this basis, when the terminal device determines that the second condition is met, the terminal device initiates a random access to the target cell to further reduce the failure rate of cell handover.

[0006] Optionally, the first information is obtained based on a reference signal.

[0007] For example, when the terminal device communicates with the network device via the downlink, the reference signal may include one or more of the following: channel state information reference signal (CSI-RS), secondary synchronization signal (SSS), primary synchronization signal (PSS), cell specific reference signal (CRS), demodulation reference signal (DMRS), and synchronization signal / physical broadcast channel block (SS / PBCH block), etc. Among them, SS / PBCH block can be abbreviated as synchronization signal block (SSB).

[0008] For another example, when the terminal device communicates with the network device to which the cell belongs via the sidelink, the reference signal may include sidelink synchronization signal / physical broadcast channel block (sidelink SSB, SL-SSB, or S-SS / PSBCH block), sidelink channel state information reference signal (SL-CSI-RS), etc.

[0009] Optionally, the second information indicates the range of the power headroom and / or whether there is a power headroom.

[0010] Optionally, the first signal is an uplink wake up signal (UL WUS).

[0011] Optionally, the serving cell may also refer to the network device to which the serving cell belongs, the neighboring cell may also refer to the network device to which the neighboring cell belongs, and the target cell may also refer to the network device to which the target cell belongs. The interaction between the serving cell, the neighboring cell, and the target cell may also be understood as the interaction between the network device to which the serving cell belongs, the network device to which the neighboring cell belongs, and the network device to which the target cell belongs. The power headroom of a cell may also be referred to as the power headroom of the network device to which the cell belongs.

[0012] In a possible implementation manner of the first aspect, at least one cell includes a serving cell and a target cell, and the first condition includes at least one of the following:

[0013] The difference between the sum of the measurement result of the target cell and the power headroom of the target cell and the sum of the measurement result of the serving cell and the power headroom of the serving cell is greater than or equal to a first threshold; or,

[0014] The sum of the measurement result of the serving cell and the power headroom of the serving cell is less than a second threshold; or,

[0015] The third information of the serving cell is received, and the measurement result of the target cell is less than a fourth threshold, where the third information is used to indicate performing cell handover.

[0016] Based on the above technical solution, when the terminal device determines whether to perform cell handover, in addition to considering the measurement result of the cell, it also considers the power headroom of the cell. If the terminal device determines that the first condition is satisfied, it indicates that the link quality of the serving cell is poor and the link quality of the target cell is good. On this basis, compared with the terminal device directly performing cell handover, the terminal device sends a first signal to the target cell to trigger the target cell to adjust the transmission power to improve the success rate of cell handover and avoid the terminal device performing cell handover in advance.

[0017] In a possible implementation manner of the first aspect, at least one cell includes a serving cell and a target cell, and the second condition includes at least one of the following:

[0018] The sum of the measurement result of the serving cell and the power headroom of the serving cell is less than a second threshold, and the sum of the measurement result of the target cell and the power headroom of the target cell is greater than or equal to a third threshold; or,

[0019] The sum of the measurement result of the target cell and the power headroom of the target cell is greater than or equal to a third threshold; or,

[0020] The third information of the serving cell is received, and the measurement result of the target cell is greater than or equal to a fourth threshold, where the third information is used to indicate performing cell handover.

[0021] Based on the above technical solution, if the terminal device determines that the second condition is met, it indicates that the transmit power of the target cell has exceeded the adjustable maximum range. At this time, the terminal device will initiate a random access to the target cell to avoid the terminal device performing a cell handover in advance.

[0022] In a possible implementation manner of the first aspect, the terminal device includes a first module and a second module for transceiver information. At least one of the first module and the second module is different in power consumption, hardware composition, and the waveform of the transmitted signal. The power consumption of the first module is less than that of the second module. The terminal device sending the first signal to the target cell includes:

[0023] The terminal device sends the first signal to the target cell based on the first module.

[0024] 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 sending the first signal to the network device based on the first module with lower power consumption can further reduce energy consumption.

[0025] Optionally, the terminal device sends the first signal to the target cell based on the first module. The target cell receives the first signal based on the first module and adjusts the transmit power of the second module of the target cell according to the first signal.

[0026] Optionally, the terminal device sends the first signal to the target cell based on the second module. Correspondingly, the network device receives the first signal based on the second module and then adjusts the transmit power of the second module of the target cell according to the first signal.

[0027] In a possible implementation manner of the first aspect, the method further includes:

[0028] The terminal device receives fourth information of the serving cell. The fourth information includes configuration information of a second signal for uplink synchronization. The second signal is different from the first signal in at least one of time-frequency resources, sequence, and chirp slope. The first signal is used to trigger the target cell to adjust the transmit power.

[0029] Based on the above technical solution, the terminal device can use the second signal to complete uplink synchronization.

[0030] Optionally, the second signal is UL WUS. The second signal is different from the first signal in one or more of time-frequency resources, signal waveform, or sequence.

[0031] In a possible implementation manner of the first aspect, the method for the terminal device to obtain the adjustment of the transmit power of the serving cell and / or the target cell includes:

[0032] The terminal device receives fifth information from the serving cell, where the fifth information is used to indicate adjustment information for the transmit power of the target cell, and / or the fifth information is used to indicate power headroom information of the serving cell and / or the target cell.

[0033] Optionally, the power headroom information of the target cell indicates the range of the power headroom of the target cell and / or whether there is a power headroom in the target cell.

[0034] Optionally, the power headroom information of the serving cell indicates the range of the power headroom of the serving cell and / or whether there is a power headroom in the serving cell.

[0035] Optionally, the fifth information is carried by a synchronization sequence indication, a master information block (MIB), broadcast by a system information block (SIB), or carried by a MAC CE or DCI.

[0036] Optionally, the adjustment information for indicating the transmit power of the serving cell and / or the target cell and the power headroom information for indicating the serving cell and / or the target cell may be transmitted through the same information (the fifth information) or the same message, or may be transmitted through different information (such as the fifth information and the sixth information) or different messages.

[0037] In a possible implementation manner of the first aspect, the method further includes:

[0038] The terminal device receives fifth information from a neighboring cell, where the fifth information is related to the power headroom of at least one neighboring cell, and the at least one neighboring cell includes the serving cell and / or the target cell;

[0039] The terminal device sends the first information and the fifth information to the serving cell.

[0040] Based on the above technical solution, when the terminal device reports measurement results to the serving cell, it will also consider the influence of the power headroom of the neighboring cell, so as to avoid the problem of handover failure caused by the terminal device performing a cell handover when there is power headroom in the neighboring cell but the transmit power is insufficient to cover the terminal device, thereby reducing the handover failure rate of the cell.

[0041] Optionally, the fifth information is carried by a synchronization sequence indication, a master information block (MIB), broadcast by a system information block (SIB), or carried by a MAC CE or DCI.

[0042] Optionally, the fifth information indicates the range of the power headroom of the neighboring cell and / or whether there is a power headroom in the neighboring cell.

[0043] In a possible implementation of the first aspect, the terminal device includes a first module and a second module for sending and receiving information. At least one of the first module and the second module is different in terms of power consumption, hardware composition, and the waveform of the transmitted signal. The power consumption of the first module is less than that of the second module. The method further includes:

[0044] The terminal device receives the configuration information of the third signal based on the first module;

[0045] The terminal device performs cell selection and / or cell reselection based on the measurement result of the third signal.

[0046] Correspondingly, the network side also has a first module and a second module for sending and receiving information. The transmission power of the first module is relatively fixed to ensure coverage, and the transmission power of the second module is dynamically adjusted as needed. When the terminal device performs cell selection and / or cell reselection, based on the configuration information of the third signal received by the first module, the reception success rate can be improved.

[0047] A second aspect of the present application provides a communication method. This method is executed by the terminal device, or by some components in the terminal device (such as a processor, a chip, or a chip system, etc.), or the terminal device can be a logical module or software that can implement all or part of the communication device functions. The terminal device includes a first module and a second module for sending and receiving information. At least one of the first module and the second module is different in terms of power consumption, hardware composition, and the waveform of the transmitted signal. The power consumption of the first module is less than that of the second module. In this method, the terminal device receives a wake-up signal from the serving cell based on the first module; the terminal device obtains the measurement result of the fourth signal based on the second module; when the measurement result of the fourth signal is less than the fifth threshold, the terminal device sends a first signal to the serving cell, and the first signal is used to trigger the serving cell to adjust the transmission power; when the measurement result of the fourth signal is greater than or equal to the fifth threshold, the terminal device sends or receives signals based on the second module.

[0048] Since the power consumption of the first module is less than that of the second module, the transmission power of the first module is relatively fixed, and the signal coverage range of the first module is generally larger than that of the second module, which is generally used to ensure coverage. The transmission power of the second module can be dynamically adjusted. Considering that the terminal device in the idle state or the inactive state may move out of the coverage range of the second module, the terminal device receives the wake-up signal based on the first module, which can improve the signal reception success rate, and compared with receiving the wake-up signal based on the second module, it also further reduces the network power consumption. After the terminal device wakes up the second module based on the wake-up signal, when the measurement result of the fourth signal is less than the fifth threshold, it triggers the terminal device to send the first signal, avoiding the terminal device from performing cell handover in advance and further reducing the network power consumption.

[0049] A third aspect of this application provides a communication method. This method is executed by a first network device, or by some components in the first network device (such as a processor, a chip, or a chip system, etc.), or the first network device may be a logical module or software that can implement all or part of the communication device functions. The first network device is the network device to which the target cell belongs. In this method, the first network device receives a first signal; the first network device adjusts the transmission power of the first network device according to the first signal.

[0050] The first network device receives the first signal of the terminal device, adjusts the transmission power of the first network device, and communicates with the terminal device based on the adjusted transmission power, thereby preventing the terminal device from performing a cell handover in advance.

[0051] In a possible implementation manner of the third aspect, the first network device includes a first module and a second module for sending and receiving information. At least one of the first module and the second module is different in power consumption, hardware composition, and the waveform of the transmitted signal. The power consumption of the first module is less than that of the second module. The first network device receiving the first signal includes:

[0052] The first network device receives the first signal based on the first module;

[0053] The first network device adjusts the transmission power of the first network device according to the first signal, including:

[0054] The first network device adjusts the transmission power of the second module according to the first signal.

[0055] Compared with the second module, since the first module has a larger coverage range and lower power consumption, the first network device receiving the first signal based on the first module with lower power consumption can not only improve the success rate of receiving the first signal, but also reduce the network energy consumption. Since the transmission power of the second module can be dynamically adjusted, after the first network device receives the first signal based on the first module, it can adjust the transmission power of the second module according to the first signal and communicate with the terminal device based on the adjusted transmission power, so as to enable the terminal device to be accessed within its coverage range.

[0056] In a possible implementation manner of the third aspect, the method further includes:

[0057] The first network device sends fifth information to the serving cell. The fifth information is used to indicate the adjustment information of the transmission power of the target cell and / or the power margin information of the target cell.

[0058] Optionally, the power margin information of the target cell indicates the range of the power margin of the target cell and / or whether there is a power margin in the target cell.

[0059] Optionally, the fifth information is carried by a synchronization sequence indication, a master information block (MIB), broadcast by a system information block (SIB), or carried by a MAC CE or DCI.

[0060] Optionally, the adjustment information for indicating the transmit power of the target cell and the power headroom information for indicating the target cell can be transmitted through the same information (fifth information) or the same message, or can be transmitted through different information (such as the fifth information and the sixth information) or different messages.

[0061] In a possible implementation manner of the third aspect, the method further includes:

[0062] The first network device receives seventh information from the serving cell, and the seventh information is used to request the target cell to adjust its transmit power.

[0063] Optionally, the power adjustment value is carried in the seventh information.

[0064] A fourth aspect of this application provides a communication method, which is executed by a second network device, or by some components in the second network device (such as a processor, a chip, or a chip system, etc.), or the second network device can be a logical module or software that can implement all or part of the communication device functions, and the second network device is the serving cell / network device to which the serving cell belongs. In this method, the second network device sends eighth information to the terminal device, and the eighth information is used to configure at least one of the following information:

[0065] A first threshold corresponding to the difference between the sum of the measurement result of the target cell and the power headroom of the target cell and the sum of the measurement result of the serving cell and the power headroom of the serving cell; or,

[0066] A second threshold corresponding to the sum of the measurement result of the serving cell and the power headroom of the serving cell; or,

[0067] A third threshold corresponding to the sum of the measurement result of the target cell and the power headroom of the target cell; or,

[0068] A fourth threshold corresponding to the measurement result of the target cell; or,

[0069] A fifth threshold corresponding to the measurement result of the fourth signal; or,

[0070] Configuration information of the first signal.

[0071] Optionally, the eighth information can be carried by at least one of the following: system message, RRC signaling, MAC CE, or predefined.

[0072] In a possible implementation of the fourth aspect, the method further includes:

[0073] The second network device receives fifth information from at least one neighboring cell, where the fifth information is related to the power headroom of the at least one neighboring cell, and the at least one neighboring cell includes a serving cell and / or a target cell.

[0074] Based on the above technical solution, the second network device can obtain the fifth information based on the interaction between cells. The first network device sends the fifth information to the serving cell, so that the serving cell makes a decision on whether to perform cell handover and whether to trigger the target cell to adjust the transmit power based on the power headroom of the neighboring cell.

[0075] Optionally, the second network device may also receive the fifth information reported by the terminal device.

[0076] In a possible implementation of the fourth aspect, the method further includes:

[0077] The second network device sends fifth information to the terminal device, where the fifth information is used to indicate the adjustment information of the transmit power of the serving cell and / or the target cell, and / or the fifth information is used to indicate the power headroom information of the serving cell and / or the target cell.

[0078] In a possible implementation of the fourth aspect, the method further includes:

[0079] The second network device sends seventh information to the target cell, where the seventh information is used to request the target cell to adjust the transmit power.

[0080] The fifth aspect of the present application provides a communication method, which is executed by the second network device, or by some components in the second network device (such as a processor, a chip, or a chip system, etc.), or the second network device may be a logical module or software that can implement all or part of the communication device functions. The second network device is the network device to which the serving cell belongs. The second network 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. The second network device is the network device to which the serving cell belongs. In this method, the second network device sends a wake-up signal to the terminal device based on the first module; the second network device receives a first signal from the terminal device; and adjusts the transmit power of the second network device according to the first signal. Or, the second network device sends a wake-up signal to the terminal device based on the first module; and the second network device sends or receives signals based on the second module.

[0081] The sixth aspect of the present application provides a communication device, which includes a transceiver unit and a processing unit. The processing unit is configured to obtain first information, where the first information includes measurement results of at least one cell; the transceiver unit is configured to receive second information, where the second information is related to the power headroom of at least one cell; the processing unit is further configured to send a first signal to a target cell when the first information and the second information meet a first condition, where the first signal is used to trigger the target cell to adjust its transmission power; the processing unit is further configured to initiate a random access to the target cell when the first information and the second information meet a second condition.

[0082] In the sixth 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 manner of the first aspect and achieve the corresponding technical effects. Specifically, reference can be made to the first aspect, and details are not described herein again.

[0083] The seventh aspect of the present application provides a communication device, which includes a transceiver unit and a processing unit; the processing unit is configured to receive a wake-up signal from a serving cell based on a first module; the processing unit is configured to obtain a measurement result of a fourth signal based on a second module; the transceiver unit is configured to send a first signal to the serving cell when the measurement result of the fourth signal is less than a fifth threshold, where the first signal is used to trigger the serving cell to adjust its transmission power; the transceiver unit is configured to send or receive a signal based on the second module when the measurement result of the fourth signal is greater than or equal to the fifth threshold.

[0084] In the seventh 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 manner of the second aspect and achieve the corresponding technical effects. Specifically, reference can be made to the second aspect, and details are not described herein again.

[0085] The eighth aspect of the present application provides a communication device, which includes a transceiver unit and a processing unit; the transceiver unit is configured to receive a first signal; the processing unit is configured to adjust the transmission power of a first network device according to the first signal.

[0086] In the eighth 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 manner of the third aspect and achieve the corresponding technical effects. Specifically, reference can be made to the third aspect, and details are not described herein again.

[0087] The ninth aspect of the present application provides a communication device, which includes a transceiver unit; the transceiver unit is configured to send eighth information to a terminal device, where the eighth information is used to configure one or more of a first threshold, a second threshold, a third threshold, a fourth threshold, a fifth threshold, or configuration information of a first signal.

[0088] In the ninth 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 manner of the fourth aspect, and achieve the corresponding technical effects. For details, please refer to the fourth aspect, which will not be elaborated here.

[0089] The tenth aspect of the present application provides a communication device, which includes a transceiver unit and a processing unit; the transceiver unit is used to send a wake-up signal to the terminal device based on the first module; the transceiver unit is used to receive a first signal from the terminal device; the processing unit is used to adjust the transmission power of the second network device according to the first signal. Or, the transceiver unit is used to send a wake-up signal to the terminal device based on the first module; the processing unit is used to send or receive signals based on the second module.

[0090] In the tenth 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 manner of the fifth aspect, and achieve the corresponding technical effects. For details, please refer to the fifth aspect, which will not be elaborated here.

[0091] The eleventh aspect of the present application provides a communication device, including at least one processor, and at least one processor is coupled to a memory; the memory is used to store programs or instructions; the at least one processor is used to execute the programs or instructions, so that the device implements the method of any one of the possible implementation manners in any one of the foregoing first to fifth aspects.

[0092] In a possible implementation manner, the communication device further includes a memory. Optionally, the processor and the memory are integrated together.

[0093] The twelfth aspect of the present application provides a communication device, including at least one logic circuit and an input / output interface; the logic circuit is used to execute the method of any one of the possible implementation manners in any one of the foregoing first to fifth aspects.

[0094] The thirteenth aspect of the present application provides a communication system, which includes the above-mentioned terminal device, the first network device, and the second network device.

[0095] The fourteenth aspect of the present application 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 of any one of the possible implementation manners in any one of the foregoing first to fifth aspects.

[0096] The fifteenth aspect of 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 the method of any one of the possible implementation manners in any one of the foregoing first to fifth aspects.

[0097] The sixteenth aspect of the present application provides a chip system, which includes at least one processor for supporting a communication device to implement the method of any possible implementation manner in any one of the first aspect to the fifth aspect above.

[0098] In a possible design, the chip system may further include a memory for storing necessary program instructions and data of the communication device. The chip system may be composed of chips or may include chips and other discrete devices. Optionally, the chip system further includes an interface circuit that provides program instructions and / or data for at least one processor.

[0099] Among them, for the technical effects brought by any one of the design manners in the sixth aspect to the sixteenth aspect, reference may be made to the technical effects brought by different design manners in the first aspect to the fifth aspect above, which will not be elaborated herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0100] Figures 1a to 1f It is a schematic diagram of the communication system provided by the present application;

[0101] Figure 2a It is a schematic diagram of the coverage range after the transmission power of the PDSCH is adjusted;

[0102] Figure 2b It is a schematic diagram of the coverage ranges of the main transceiver and the low-power transceiver of a network device;

[0103] Figure 2c It is a schematic diagram of triggering the target cell to increase the transmission power;

[0104] Figure 3 It is a schematic diagram of an implementation of the communication method provided by an embodiment of the present application;

[0105] Figure 4 It is a schematic diagram of the process of cell handover in the basic handover scenario provided by an embodiment of the present application;

[0106] Figure 5 It is another schematic diagram of an implementation of the communication method provided by an embodiment of the present application;

[0107] Figure 6 It is a schematic diagram of the judgment of triggering the transmission power adjustment in the paging scenario provided by an embodiment of the present application;

[0108] Figures 7 to 11 It is a schematic diagram of the communication device provided by the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0109] First, some terms in the embodiments of the present application are explained to facilitate the understanding of those skilled in the art.

[0110] (1) Terminal device: It can be a wireless terminal device capable of receiving scheduling and indication information from a network device. The wireless terminal device can be a device that provides voice and / or data connectivity to a user, or a handheld device with wireless connection capabilities, or other processing devices connected to a wireless modem.

[0111] The terminal device can communicate with one or more core networks or the Internet via a radio access network (RAN). The terminal device can be a mobile terminal device, such as a mobile phone (or "cellular" phone, mobile phone), computer, and data card. For example, it can be a portable, pocket-sized, handheld, computer-integrated, or vehicle-mounted mobile device that exchanges voice and / or data with the radio access network. For example, personal communication service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), tablets (Pads), computers with wireless transceiver functions, and other devices. The wireless terminal device can also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile station (MS), remote station, access point (AP), remote terminal device, access terminal device, user terminal device, user agent, subscriber station (SS), customer premises equipment (CPE), terminal device, user equipment (UE), mobile terminal device (mobile terminal, MT), etc.

[0112] By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. A wearable device may also be referred to as a wearable intelligent device or a smart wearable device, etc. It is a general term for devices developed by applying wearable technology to the intelligent design of 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 clothing or accessories. A wearable device is not just a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable intelligent devices include those with complete functions and large sizes that can achieve complete or partial functions without relying on a smartphone, such as smart watches or smart glasses, etc., and those that only focus on a certain type of application function and need to cooperate with other devices such as a smartphone, such as various smart bracelets for vital sign monitoring, smart helmets, and smart jewelry.

[0113] The terminal device may also be a drone, a robot, a terminal device in device-to-device (D2D) communication, a vehicle-to-everything (V2X) terminal device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in smart city, a wireless terminal device in smart home, etc.

[0114] In addition, the terminal device may also be a terminal device in a communication system evolved after the fifth-generation (5G) communication system (such as the sixth-generation (6G) communication system, etc.) or a terminal device in a future-evolved public land mobile network (PLMN). Exemplarily, the 6G network can further expand the form and function of 5G communication terminal devices. 6G terminal devices include, but are not limited to, vehicles, cellular network terminal devices (integrating satellite terminal device functions), drones, and Internet of Things (IoT) devices.

[0115] In the embodiments of the present application, the above terminal device may also obtain the AI service provided by the network device. Optionally, the terminal device may also have AI processing capabilities.

[0116] (2) Network device: It can be a device in a wireless network. For example, the network device can be a RAN node (or device) that connects the terminal device to the wireless network, and can also be called a base station. Currently, some examples of RAN devices 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 in a 6G communication system or a next-generation wireless communication system, or wireless fidelity (Wi-Fi) access point AP, etc. Additionally, in a network structure, the network device may include a centralized unit (CU) node, or a distributed unit (DU) node, or a RAN device including a CU node and a DU node.

[0117] Optionally, the RAN node may also be a macro base station, a micro base station or an indoor station, a relay node or a donor node, or a radio controller in a cloud radio access network (CRAN) scenario. The RAN node may also be a server, a wearable device, a vehicle or an in-vehicle device, etc. For example, the access network device in vehicle to everything (V2X) technology may be a road side unit (RSU).

[0118] In another possible scenario, multiple RAN nodes cooperate to assist a terminal device in achieving wireless access, and different RAN nodes respectively implement some functions of a base station. For example, the RAN node can be a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. The CU and the DU can be separately provided, or can also be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as being included in a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0119] In different systems, the 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 RAN (O-RAN or ORAN) system, the CU can also be called an O-CU (open CU), the DU can also be called an O-DU, the CU-CP can also be called an O-CU-CP, the CU-UP can also be called an O-CU-UP, and the RU can also be called an O-RU. For the convenience of description, in this application, the CU, CU-CP, CU-UP, DU, and RU are used as examples for description. Any one of the 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.

[0120] 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: radio resource control (RRC) layer, packet data convergence protocol (PDCP) layer, radio link control (RLC) layer, media access control (MAC) layer, or physical (PHY) layer, etc. The user plane protocol layer may include at least one of the following: service data adaptation protocol (SDAP) layer, PDCP layer, RLC layer, MAC layer, or physical layer, etc.

[0121] For the correspondence between the network elements in the ORAN system and the protocol layer functions they can implement, reference can be made to Table 1 below.

[0122] Table 1

[0123] ORAN network element Protocol layer functions of 3GPP O-CU-CP RRC + PCDP - control plane (PDCP-C) O-CU-UP SDAP + PCDP - user plane (PDCP-U) O-DU RLC + MAC + PHY-high O-RU PHY-low

[0124] The network device may be other devices that provide wireless communication functions for the terminal device. The specific technologies and device forms adopted by the network device are not limited in the embodiments of the present application. For ease of description, the embodiments of the present application do not limit.

[0125] The network device may further include core network devices, such as the mobility management entity (MME), home subscriber server (HSS), serving gateway (S-GW), policy and charging rules function (PCRF), and public data network gateway (PDN gateway, P-GW) in the 4th generation (4G) network; network elements such as the access and mobility management function (AMF), user plane function (UPF), or session management function (SMF) in the 5G network. In addition, the core network device may further include other core network devices in the 6G network and the next-generation network of the 6G network.

[0126] In the embodiments of the present application, the above network device may further have a network node with AI capabilities, which can provide AI services for terminal devices or other network devices. For example, it can be an AI node, computing power node, RAN node with AI capabilities, or core network element with AI capabilities of the network device (access network or core network).

[0127] In the embodiments of the present application, the device for implementing the functions of the network device may be the network device itself, or a device capable of supporting the network device to implement such functions, such as a chip system. This device may be installed in the network device. In the technical solutions provided in the embodiments of the present application, the case where the device for implementing the functions of the network device is the network device itself is taken as an example to describe the technical solutions provided in the embodiments of the present application.

[0128] (3) Beam

[0129] A beam is a communication resource, which refers to the special directional transmission or reception effect formed by the transmitter or receiver of the network device or terminal device through an antenna array, similar to the beam of light converged in one direction by a flashlight. By sending and receiving signals in the form of beams, the transmission distance of the signals can be effectively increased.

[0130] A beam can be divided into a transmit beam and a receive beam. The technology for forming a beam can be beamforming technology or other technical means. Beamforming includes transmit beamforming and receive beamforming. The beamforming technology can specifically be digital beamforming technology, analog beamforming technology, or hybrid digital / analog beamforming technology, etc.

[0131] Among them, the transmit beam: The transmitting device sends a signal with a certain beamforming weight value, so that the transmitted signal forms a spatially directed beam. Among them, in the uplink direction, the transmitting device can be a terminal device; in the downlink direction, the transmitting device can be a network device.

[0132] The receive beam: The receiving device receives a signal with a certain beamforming weight value, so that the received signal forms a spatially directed beam. Among them, in the uplink direction, the receiving device can be a network device; in the downlink direction, the receiving device can be a terminal device.

[0133] A beam can be a wide beam, or a narrow beam, or other types of beams.

[0134] 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). The terminal device determines the beam corresponding to the reference resource according to the reference resource included in the TCI - state. Different beams can be regarded as different resources, and the same information or different information can be sent using (or through) different beams.

[0135] A beam pair is based on the concept of a beam. A beam pair usually includes a transmit beam of the transmitting device and a receive beam of the receiving device. It should be noted that if not 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 device.

[0136] In a communication system, such as a 5G New Radio (NR) system, both network devices and terminal device apparatuses can generate one or more transmission beams and one or more reception beams. Before transmitting data, the network device and the terminal device apparatus need to perform beam alignment. In a 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. A beam used for transmitting 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. A beam used for receiving a signal 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 in the embodiments of this application, the beam is uniformly used for expression, but the beam can be alternatively understood as other equivalent concepts and is not limited to the concepts mentioned above.

[0137] (4) Resource

[0138] In a communication protocol, reference signals are configured in the form of resources. The network device will configure each reference signal to the terminal device apparatus 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 position of the reference signal, the number of ports, the time domain type (periodic / semi-static / aperiodic), etc.

[0139] A resource can be an uplink signal resource or a downlink signal resource.

[0140] The uplink signals include, but are not limited to, sounding reference signal (SRS) and demodulation reference signal (DMRS).

[0141] The 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 signal / physical broadcast channel block (SS / PBCH block). Among them, SS / PBCH block can be abbreviated as synchronization signal block (SSB).

[0142] Resources can be configured through RRC messages. In terms of the configuration structure, a resource is a data structure that includes the relevant parameters of its corresponding uplink / downlink signals. For example, the type of uplink / downlink signals, the resource granule carrying the uplink / downlink signals, the transmission time and period of the uplink / downlink signals, the number of ports used to transmit the uplink / downlink signals, etc. Each resource of the uplink / downlink signals has a unique identifier to identify the resource of the downlink signal.

[0143] (5) Chirp signal

[0144] A chirp signal refers to a signal whose carrier frequency linearly increases within the pulse duration when encoding a pulse. That is to say, a signal whose frequency increases or decreases with time.

[0145] (6) Configuration and pre-configuration: In this application, both configuration and pre-configuration are used. Among them, configuration means that the network device / server sends the configuration information or value of some parameters to the terminal device through messages or signaling, so that the terminal device can determine the communication parameters or resources during transmission according to these values or information. Pre-configuration is similar to configuration, and it can be the parameter information or parameter values pre-negotiated between the network device / server and the terminal device, or the parameter information or parameter values adopted by the base station / network device or terminal device stipulated by the standard protocol, or the parameter information or parameter values pre-stored in the base station / server or terminal device. This application does not make any limitations on this.

[0146] Furthermore, these values and parameters can be changed or updated.

[0147] (7) The terms "system" and "network" in the embodiments of the present application can be used interchangeably. "Plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after. "At least one (item)" or similar expressions thereof refer to any combination of these items, including any combination of single item (item) or plural items (items). For example, "at least one of A, B, and C" includes A, B, C, AB, AC, BC, or ABC. Also, 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.

[0148] (8) "Sending" and "receiving" in the embodiments of the present application represent the direction of signal transmission. For example, "sending information to XX" can be understood as the destination of the information is XX, which can include directly sending through the air interface and also include indirectly sending by other units or modules through the air interface. "Receiving information from YY" can be understood as the source of the information is YY, which can include directly receiving from YY through the air interface and can also include indirectly receiving from YY through the air interface by 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.

[0149] In other words, sending and receiving can be carried out between devices. For example, between a network device and a terminal device, or can be carried out within a device. For example, sending or receiving between components, modules, chips, software modules, or hardware modules within a device through a bus, trace, or interface.

[0150] It can be understood that necessary processing may be performed on the information between the source end and the destination end of the information sending, such as encoding, modulation, etc., but the destination end can understand the valid information from the source end. Similar expressions in the present application can be understood similarly and will not be elaborated further.

[0151] (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. If the information indicated by a certain piece of information (such as the indication information described below) is called the information to be indicated, then in the specific implementation process, there are many ways to indicate the information to be indicated. For example, but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the index of the information to be indicated, etc. It is also possible to indirectly indicate the information to be indicated by indicating other information, where there is an association relationship between the other information and the information to be indicated; it is also possible to only indicate a part of the information to be indicated, while the other parts of the information to be indicated are known or pre-agreed. For example, the arrangement order of each piece of information pre-agreed (such as protocol pre-definition) can be used to implement the indication of specific information, thereby reducing the indication overhead to a certain extent. The present application does not limit the specific manner of indication. It can be understood 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.

[0152] In the present application, unless otherwise specified, the same or similar parts between various embodiments can be referred to each other. In various embodiments of the present application, as well as in each method / design / implementation manner in each embodiment, if there is no special specification and logical conflict, the terms and / or descriptions between different embodiments, as well as between each method / design / implementation manner in each embodiment, are consistent and can be mutually referred to. The technical features in different embodiments, as well as in each method / design / implementation manner in each embodiment, can be combined to form new embodiments, methods, or implementation manners according to their internal logical relationships. The embodiments of the present application described below do not constitute a limitation on the protection scope of the present application.

[0153] The present application can be applied to an LTE system, an NR system, or a communication system evolved after 5G (such as Beyond 5G (B5G), 5.5G, 6G, etc.). Among them, the communication system includes at least one network device and / or at least one terminal device.

[0154] Please refer to Figure 1a , which is a schematic diagram of the architecture of the communication system 1000 to which the embodiments of the present application are applied. As Figure 1a shown, the communication system includes a radio access network (RAN) 100 and a core network 200. Optionally, the communication system 1000 may further include the Internet 300. Among them, RAN100 includes at least one RAN node (such as Figure 1a 110a and 110b in Figure 1aAmong 120a - 120j (collectively referred to as 120). RAN100 may also include other RAN nodes, such as wireless relay devices and / or wireless backhaul devices ( Figure 1a not shown in the figure). The terminal device 120 is connected to the RAN node 110 wirelessly, and the RAN node 110 is connected to the core network 200 wirelessly or wired. The core network devices in the core network 200 and the RAN nodes 110 in the RAN100 may be independent different physical devices, or may be the same physical device integrating the logical functions of the core network devices and the logical functions of the RAN nodes. The terminal devices and the terminal devices, as well as the RAN nodes and the RAN nodes, may be connected to each other wired or wirelessly.

[0155] RAN100 may be an evolved universal terrestrial radio access (E-UTRA) system, an NR system, a 6G system, and future wireless access systems defined in 3GPP. RAN100 may also include two or more different wireless access systems as described above. RAN100 may also be an open RAN (O-RAN).

[0156] For ease of description, in the following, the base station is taken as an example of the RAN node for description.

[0157] The base station and the terminal device may be fixed in position or movable. The base station and the terminal device may be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; may also be deployed on the water surface; may also be deployed on airplanes, balloons, and artificial satellites. The embodiments of the present application do not limit the application scenarios of the base station and the terminal device.

[0158] The roles of the base station and the terminal device may be relative. For example, Figure 1a the helicopter or drone 120i in the figure may be configured as a mobile base station. For those terminal devices 120j accessing the wireless access network 100 through 120i, the terminal device 120i is the base station; but for the base station 110a, 120i is the terminal device, that is, the communication between 110a and 120i is through the wireless air interface protocol. Of course, the communication between 110a and 120i may also be through the interface protocol between the base stations. At this time, relative to 110a, 120i is also the base station. Therefore, the base station and the terminal device can both be uniformly referred to as communication devices. Figure 1a 110a and 110b in the figure may be referred to as communication devices with base station functions. Figure 1a 120a - 120j in the figure may be referred to as communication devices with terminal device functions.

[0159] In an embodiment of the present application, the functions of the base station can also be performed by a module (such as a chip) in the base station, or by a control subsystem including the functions of the base station. The control subsystem including the functions of the base station here can be a control center in the above application scenarios such as smart grid, industrial control, intelligent transportation, and smart city. The functions of the terminal device can also be performed by a module (such as a chip or a modem) in the terminal device, or by a device including the functions of the terminal device.

[0160] Figure 1b Another schematic diagram of a communication system provided by an embodiment of the present application. In Figure 1b it, taking the network device as the base station as an example for illustration, both device 1 and device 2 are terminal devices. As Figure 1b shown, the communication link between device 1 and device 2 can be called a sidelink, and the communication link between device 1 (or device 2) and the base station can be called an uplink and downlink, including an uplink and a downlink; it can be seen that the sidelink is a communication mechanism in which different terminal devices communicate directly without passing through a network device.

[0161] Optionally, in the sidelink (SL), generally speaking, the transmitting device and the receiving device can be terminal devices or network devices of the same type, or a roadside unit (RSU) and a terminal device. Among them, from a physical entity perspective, the RSU is a roadside station or a roadside unit, and from a functional perspective, the RSU can be a terminal device or a network device, and the present application does not limit 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 roadside 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 roadside station. In addition, the sidelink can also be base station devices of the same type or different types. At this time, the function of the sidelink is similar to that of a relay link, but the air interface technology used can be the same or different.

[0162] Exemplarily, broadcasting, unicasting, and multicasting are supported on the sidelink.

[0163] Broadcast communication is similar to a network device broadcasting system information, that is, the terminal device sends broadcast service data without encryption, and any other terminal device within the effective reception range can receive the data of the broadcast service if it is interested in the broadcast service.

[0164] Unicast communication is similar to the data communication after establishing an RRC connection between a terminal device and a network device, and a unicast connection needs to be established between two terminal devices first. After establishing the unicast connection, the two terminal devices can perform data communication based on the negotiated identifier, and the data can be encrypted or unencrypted. Compared with broadcast, in unicast communication, only the two terminal devices that have established the unicast connection can perform this unicast communication.

[0165] Optionally, a unicast communication on the sidelink corresponds to a pair of source layer-2 identifiers (source layer-2 identifier, denoted as source L2 ID) and destination layer-2 identifiers (destination Layer-2 Identifier, denoted as destination L2 ID). Optionally, the source L2 ID and the destination L2 ID will be included in the sub-header of the media access control protocol data unit (MAC PDU) in the sidelink, so that the data can be transmitted to the correct receiving end.

[0166] Multicast communication refers to the communication between all terminal devices within a communication group, and any terminal device within the group can send and receive the data of this multicast service.

[0167] As Figure 1c shown, when a terminal device (denoted as UE1) communicates directly with another terminal device (denoted as UE2) without passing through a network device, the communication link between the two terminal devices can be called a sidelink, or it can be said that the two terminal devices communicate based on the proximity-based services communication 5 (PC5) interface.

[0168] As Figure 1dAs shown, V2X communication technology, as a typical application of sidelink, utilizes and enhances the current cellular network functions and elements to achieve low-latency and high-reliability communication among various nodes in the vehicle network, including vehicle-to-vehicle communication (abbreviated as V2V), vehicle-to-pedestrian communication (abbreviated as V2P), vehicle-to-infrastructure communication (abbreviated as V2I), and vehicle-to-network communication (abbreviated as V2N). With the evolution of cellular systems from 4G Long Term Evolution (abbreviated as LTE) to 5G, C-V2X evolves from LTE-V2X to NR-V2X (New Radio V2X, abbreviated as NR-V2X).

[0169] In addition, V2X communication has great potential in reducing vehicle collision accidents, so it can also reduce the corresponding number of casualties. The advantages of V2X are not limited to improving safety. Vehicles capable of V2X communication contribute to better traffic management, further promoting green transportation and lower energy consumption. The Intelligent Transportation System (abbreviated as ITS) is an application that combines with V2X. Based on V2X technology, Vehicle UEs (abbreviated as V-UEs) can send some of their own information, such as location, speed, intention (turning, lane changing, reversing), etc., periodically and information triggered by some non-periodic events to surrounding V-UEs. Similarly, V-UEs will also receive information from surrounding users in real time. 5G NR V2X can support lower transmission latency, more reliable communication transmission, higher throughput, better user experience, and meet the requirements of a wider range of application scenarios. Further, the vehicle-to-vehicle communication technology supported by V2X can be extended to device-to-device (abbreviated as D2D) communication under any system.

[0170] As Figure 1e shown, the application scenario of the embodiment of this application can be the SA scenario. The terminal device can be connected to a single base station. Among them, 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 system. For example, if the core network is 5G Core, then the corresponding base station is a 5G base station, and the 5G base station is connected to 5G Core; another example is that if the core network is 6G Core, then the corresponding base station is a 6G base station, and the 6G base station is connected to 6G Core. It should be noted that the number of terminal devices can be one or more.

[0171] As Figure 1fAs shown, 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 or the same systems simultaneously. For example, when the core network is 5G Core, the terminal device can be connected to a 5G base station and a 6G base station simultaneously, where the 5G base station serves as the primary station and the 6G base station serves as the secondary station; for another example, when the core network is 6G Core, the terminal device can be connected to a 5G base station and a 6G base station simultaneously, where the 6G base station serves as the primary station and the 5G base station serves as the secondary station; for yet another example, the core network can be 6G Core, and the terminal device can be connected to two 6G base stations simultaneously, with both the primary station and the secondary station being 6G base stations. It should be noted that the number of terminal devices can be one or more.

[0172] In a wireless communication system, the communication between a terminal device and a network device follows a certain protocol layer structure. For example, the protocol layer structure can 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), etc. Among them, in the 3GPP standard, layer 1 (L1) can refer to the PHY layer, layer 2 can refer to the MAC layer, and layer 3 can refer to the RRC layer.

[0173] The technical solution provided by the present application can be applied to a wireless communication system (such as Figure 1a , Figure 1b , Figure 1c , Figure 1d , Figure 1e or Figure 1f the system shown), and the applicable scenarios include terrestrial cellular communication, non-terrestrial communication NTN, satellite communication, high altitude platform station (HAPS) communication, V2X, integrated access and backhaul (IAB), reconfigurable intelligent surface (RIS) communication, etc.

[0174] In a wireless communication system, as the network scale continues to expand, the network energy consumption also continues to increase. To reduce the network energy consumption, one approach is to enable the adaptive adjustment of the power deviation between the physical downlink shared channel (PDSCH) and the channel state information reference signal (CSI-RS). The network device can broadcast the transmission power of the SSB through the system message to indicate the transmission power of the secondary synchronization signal (SSS). In addition, the network device can also configure the power deviation between the non-zero power-channel state information reference signal (NZP CSI-RS) and the SSB through the RRC signaling to determine the transmission power of the NZP CSI-RS. In addition, the network device also configures the power deviation between the PDSCH and the NZP CSI-RS.

[0175] To better achieve the effective adjustment of the power deviation between the PDSCH and the 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 deviation values to assist the network device in determining the optimal power deviation between the PDSCH and the CSI-RS and notify the terminal device accordingly.

[0176] As Figure 2a shown, based on the above enhancements, the transmission power of the PDSCH can achieve more effective semi-static adjustment. Or rather, the transmission power of the PDSCH can be less than the maximum transmission power, and the energy consumption of the network device can be reduced by reducing the transmission power. However, the above enhancements only adjust the transmission power of the PDSCH and do not adjust the transmission power of the common signals, such as the SSB, system information block 1 (SIB1), other system information (OSI), paging messages, etc. The transmission power of the common signals is still sent through the SIB1, and whether to adjust it is left to the network device to implement. When the network device decides to adjust, it will update the SIB1 message accordingly. However, in the actual existing network, after the network is planned, to avoid coverage holes, the transmission power of the common signals will not be adjusted.

[0177] Based on the above problems, in order to reduce the power consumption of network devices, a first module and a second module are deployed on the network devices. Among them, 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. The first module is, for example, a low power radio (LR), and the low power radio is based on a chirp signal, or an on-off key (OOK) signal, or a passive reflection signal. The second module is, for example, a main radio (MR), and the main radio is based on orthogonal frequency division multiplexing (OFDM) or discrete fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) signal. As Figure 2b shown, the low power radio ensures coverage, and the transmit power of the main radio is dynamically adjusted according to user requests. Based on this, when there are only near-point users or even no load in the network, the main radio can transmit signals with a lower transmit power. For users not covered by the main radio, they can send auxiliary information to trigger the base station to increase the transmit power or the number of repetitions.

[0178] In the scenario where both a low power radio and a main radio are deployed on the network device, since the signals transmitted by the two have different waveforms and transmit powers, and the transmit power of the main radio is dynamically adjustable. In this architecture, if the cell does not transmit signals at full power, directly judging whether to perform cell handover based on the measurement results of the signal may cause the terminal device to perform cell handover in advance, increasing network power consumption. In this architecture, how to perform mobility management, that is, the execution of cell selection, cell reselection, and cell handover is one of the problems that need to be solved urgently. If the network device has power margin, theoretically, as Figure 2c shown, when the terminal device is outside the coverage area of the main radio or the signal quality is poor, can the target cell be triggered to increase the transmit power.

[0179] To solve the above problems, the embodiments of the present application provide a communication method. Before introducing the specific implementation manners of the method provided by the embodiments of the present application, mobility management is first introduced.

[0180] Taking the terminal device as the UE and the network device as the base station as an example, according to the connection situation between the UE, the base station, and the core network, NR supports three states of the UE, including: idle state, inactive state, and connected state. Specifically:

[0181] RRC connected state: The UE and the base station have established an RRC connection.

[0182] RRC idle state: The UE and the base station have not established an RRC connection.

[0183] RRC inactive state: The UE in this state pauses data processing, but the base station still maintains the UE's context information. Simply put, the radio interface state of the UE in the RRC inactive state is similar to that in the RRC idle state, but from the perspective of the core network side, the UE in the RRC inactive state is still in the connected state.

[0184] The mobility management in different states is divided into:

[0185] RRC connected state: Cell handover.

[0186] RRC idle state: Cell reselection, tracking area (TA) update.

[0187] RRC inactive state: Cell reselection, RAN notification area (RNA) update, TA update, etc.

[0188] It can be seen that the mobility management in the RRC inactive state is similar to that in the RRC idle state, mainly including cell reselection, RNA or TA update. RNA is similar to TA. The core idea is that when the UE moves out of this area (RNA area or TA area), the UE needs to re - establish a connection to notify the network side so that the subsequent network side can page the UE in the new RNA area or TA area.

[0189] For cell reselection, the overall process includes three stages: starting neighbor cell measurement, reselection evaluation and decision, and cell reselection execution. In the NR system, the measurement signal for cell reselection is the SSB. The following specifically introduces these three stages.

[0190] I. Starting neighbor cell measurement

[0191] In order to achieve the purpose of UE energy saving by restricting measurement actions, the UE will start neighbor cell measurement only when certain conditions are met. Based on this condition, a decision is made on the current serving cell, and after the decision passes, the neighbor cell measurement is started.

[0192] The main factors considered for the neighboring cell measurement start condition are: the cell reselection priority and the signal quality of the current serving cell. Specifically as follows:

[0193] (1) The neighboring cell priority is higher than that of the serving cell: Regardless of how good the signal of the serving cell is, the neighboring cell measurement is unconditionally started.

[0194] (2) The neighboring cell priority is equal to that of the serving cell: Based on the signal quality of the current serving cell and the signal quality threshold configured by the network side (the thresholds defined in NR, the same-frequency measurement start threshold S in system information block 2 (SIB2)) intrasearchP , the inter-frequency measurement start threshold S nonintrasearchP ), determine whether to start the neighboring cell measurement.

[0195] (a) If the signal quality of the current serving cell is higher than the signal quality threshold configured by the network side, the neighboring cell measurement is not started.

[0196] (b) If the signal quality of the current serving cell is lower than or equal to the signal quality threshold configured by the network side, the neighboring cell measurement is started.

[0197] (3) The neighboring cell priority is lower than that of the serving cell: Based on the signal quality of the current serving cell and the signal quality threshold configured by the network side, determine whether to start the neighboring cell measurement.

[0198] It can be seen that the cell reselection priority is one of the key factors affecting whether to start the neighboring cell measurement. In the NR system, the cell reselection priority is generally obtained from the system message of the current serving cell, and this type of priority can also be called the general cell reselection priority; in addition, the cell reselection priority can also be obtained from the RRC release message, or inherited from other systems, and this type of message is called the UE-specific priority. If the UE obtains both the general cell reselection priority and the UE-specific priority at the same time, the UE will ignore the general cell reselection priority.

[0199] II. Reselection Evaluation and Decision

[0200] Similar to the aforementioned neighboring cell start measurement, the reselection evaluation and decision can also be divided into the following three scenarios based on the priority:

[0201] (1) High-priority neighboring cell reselection evaluation and decision.

[0202] The UE has been in the serving cell for more than 1 s, and the signal quality of the high-priority neighboring cell is greater than the cell reselection threshold (Thresh X,highP , Thresh x,highQ ) broadcast for this frequency point in system information block 4 (SIB4)

[0203] (2) Evaluation and decision on reselection to neighboring cells with equal priority.

[0204] (a) Calculate the R values of the neighboring cell and the current serving cell

[0205] The R value of the cell is calculated according to the formula in 3rd generation partnership project (3GPP) TS 38.304.

[0206] a) Signal quality level of the neighboring cell: R n = Q meas,n - Q offset - Q offsettemp .

[0207] b) Signal quality level of the current serving cell: R s = Q meas,n + Q hyst - Q offsettemp .

[0208] Among them, R n is the R value of the neighboring cell, R s is the R value of the serving cell, Q meas is the reference signal received power (RSRP) value for cell reselection, Q hyst is the hysteresis value of the sorting criterion, Q offset and Q offsettemp are used to determine the offset, and the parameters are sent to the terminal device through the system message.

[0209] (b) The UE has been in the serving cell for more than 1 s, and the best cell selected (the cell with the highest R value in the sorting result) continuously meets the cell reselection criterion during TreselectionNR.

[0210] (3) Evaluation and decision on reselection to low-priority neighboring cells.

[0211] None of the cells with high priority or equal priority meet the cell reselection criterion, and within a period of time, the signal quality of the serving cell is lower than the threshold indicated in SIB2 (Squal < Thresh Serving,LowQ ), and the low-priority frequency band is higher than the threshold in SIB4 or system information block 5 (SIB5) (Squal > ThreshX,LowQ).

[0212] III. Cell reselection execution

[0213] After completing neighbor cell measurements and confirming the existence of a new cell that meets the cell reselection conditions, the UE will start attempting to camp on the new cell. The UE searches for the target cell, then receives the system information of the target cell. If there is no access restriction, it camps on the target cell, that is, reselects to the target cell; otherwise, the UE remains camped on the current serving cell.

[0214] For a connected UE, the UE will perform measurements and feedback based on the measurement objects (SSB or CSI-RS) configured by the network side. The network side determines whether to perform a handover based on the reported measurement results, interacts with the target station, obtains the configuration information of the target station, and then sends a handover signaling to instruct the UE to perform a handover. According to whether the serving cells before and after the handover belong to different gNodeBs, or whether there is a corresponding Xn interface between gNodeBs when they are different, the handover is divided into three scenarios: in-station handover, inter-station Xn handover, and inter-station NG handover. However, regardless of which scenario, the handover mainly includes the following links:

[0215] (1) The gNodeB determines whether to initiate the handover process.

[0216] (2) The gNodeB passes the measurement configuration information to the UE through the RRCReconfiguration message.

[0217] (3) The UE performs relevant measurements according to the measurement configuration information and generates cell measurement results.

[0218] (4) The UE reports the measurement results to the gNodeB through a measurement report (measurement result reporting).

[0219] (5) The gNodeB determines whether there is a suitable new serving cell according to the measurement report.

[0220] (6) The gNodeB finds a suitable new serving cell and instructs the UE to perform a handover.

[0221] In traditional NR basic handover, due to the deterioration of the radio environment between the UE and the source base station, the following two situations may occur, and both situations will lead to handover failure. At this time, the UE will identify a radio link failure and initiate an RRC reconstruction process.

[0222] (1) The UE's measurement report cannot reach the base station.

[0223] (2) After the base station receives the measurement report, the handover command sent to the UE cannot reach the UE.

[0224] Therefore, in order to reduce the probability of handover failure and improve the reliability of handover, the 3GPP Release 16 (R16) protocol introduced conditional handover (CHO). Before the radio environment between the UE and the source base station deteriorates further, CHO allows the source base station to send the handover command (with the radio parameter configuration of the candidate target base station and the trigger condition for handover execution) to the UE in advance, enabling the UE to know in advance how to access the target base station. After the UE finds a base station that meets the handover trigger condition among the candidate target base stations, it can independently decide to initiate handover execution to increase the chance of successful message transmission and improve the handover success rate.

[0225] In addition, for traditional NR basic handover, the acquisition of measurement configuration and the reporting of measurement results are both carried on RRC signaling. Since the RRC signaling takes at least a dozen milliseconds to take effect, it will bring corresponding delays. Therefore, the 3GPP Release 18 (R18) protocol introduced layer 1 / layer 2 triggered mobility (LTM). The core idea is that the network side will configure LTM candidate cells in advance through RRC signaling. The terminal device will perform downlink synchronization and uplink synchronization in advance in the candidate cells (such as receiving downlink synchronization signals and sending uplink preambles). The UE will report the measurement results of the candidate cells through L1 measurement reports, and the network side will send a cell handover command MAC CE to instruct the terminal device to perform handover.

[0226] For cell handover in NR, whether it is basic handover, conditional handover, or layer 1 / layer 2 triggered mobility, the measurement signals are both SSB or CSI-RS, and the specific information is obtained through the measurement object configuration configured by the base station. For cell reselection in NR, the measurement signal is SSB, and the specific information is obtained through the system message of the base station.

[0227] It should be understood that the above mobility management is implemented in the scenario where there is only a main transceiver at the base station. In order to reduce the energy consumption on the base station side, a low-power transceiver and a main transceiver will be deployed simultaneously on the base station side. In this architecture, this embodiment provides a communication method. Please refer to Figure 3 , Figure 3 which is a schematic diagram of an implementation of the communication method provided by the embodiment of the present application. The method includes the following steps.

[0228] It should be noted that in Figure 3 the method is illustrated by taking the terminal device and the network device to which the cell belongs as the execution entities of this interaction schematic, but the present application does not limit the execution entities of this interaction schematic. For example, in Figure 3Among them, the execution entity of the method can be replaced by a chip, a chip system, a processor, a logic module, software, etc. in a terminal device or a network device.

[0229] S301. The terminal device obtains first information, and the first information includes measurement results of at least one cell.

[0230] The first information can be understood as the measurement result of the downlink reference signal, or can be understood as the signal quality between the terminal device and at least one cell.

[0231] In one implementation, the signal quality between the terminal device and at least one cell can be obtained based on the reference signal.

[0232] The network device to which the cell belongs configures each reference signal to the terminal device in the form of a resource. A resource is a configuration information unit, usually including parameters related to a reference signal, such as the time-frequency resource location of the reference signal, the number of ports, the time-domain type (periodic / semi-static / aperiodic), etc. The terminal device measures the current serving cell according to the configuration information. When it is necessary to measure a neighboring cell, the terminal device also measures the neighboring cell according to the measurement configuration. The measurement report is obtained based on the measurement results of the reference signal (such as SS / PBCH block, CSI-RS, etc.).

[0233] For example, in the case where the terminal device and the network device communicate through the downlink, the reference signal may include CSI-RS, SSS, primary synchronization signal (PSS), cell specific reference signal (CRS), demodulation reference signal (DMRS), discovery reference signal (DRS), and synchronization signal / physical broadcast channel block (SS / PBCH block), etc. Among them, SS / PBCH block can be abbreviated as SSB.

[0234] For another example, in the case where the terminal device communicates with the network device to which the cell belongs via a sidelink, 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.

[0235] Optionally, the terminal device obtains the configuration information of the reference signal based on the message broadcast by the network device.

[0236] It should be understood that for the convenience of description, in this application, the serving cell may also be referred to as the network device to which the serving cell belongs, the neighboring cell may also be referred to as the network device to which the neighboring cell belongs, and the target cell may also be referred to as the network device to which the target cell belongs. The interaction between the serving cell, the neighboring cell, and the target cell may also be understood as the interaction between the network device to which the serving cell belongs, the network device to which the neighboring cell belongs, and the network device to which the target cell belongs. The power headroom of the cell may also be referred to as the power headroom of the network device to which the cell belongs. In this embodiment, when describing the network device to which the cell belongs, it is directly described as the cell. It should be understood that those skilled in the art can undoubtedly understand that, for example, sending information to the cell means sending information to the network device to which the cell belongs.

[0237] In this embodiment, the network device to which the cell belongs 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 the waveform of the transmitted signal, and the power consumption of the first module is less than that of the second module. Correspondingly, the terminal device also 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 the waveform of the transmitted signal, and the power consumption of the first module is less than that of the second module.

[0238] Optionally, the first module is a low power radio (LR), and the low power radio transmits and receives a first type of signal, Type1, and the first type of signal is a chirp signal, an on-off key signal, or a passive reflection signal.

[0239] Optionally, the second module is a main radio (MR), and the main radio transceiver sends and receives Type 2 signals. 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.

[0240] 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, for terminal devices within the cell coverage, whether they are in the idle state, inactive state, or connected state, they can receive the first type of signal. The second type of signal provides services for users with data transmission requirements and needs to consider the state of the terminal device, that is, only consider terminal devices in the connected state or inactive state terminal devices that support small packet data transmission. It should be understood that the transmission power adjusted by the network device to which the cell belongs only ensures the coverage of such users.

[0241] In this architecture, the low-power transceiver of the network device to which the cell belongs is used to ensure coverage, so its transmission power is relatively fixed. The main transceiver of the network device to which the cell belongs is used to provide services for users, so its transmission power can be dynamically adjusted, such as flexibly adjusted based on the location, channel quality, data volume, etc. of the terminal device.

[0242] In this architecture, for terminal devices in the connected state, the network device to which the cell belongs mainly sends and receives signals through the main transceiver. Therefore, cell handover is mainly measured based on the reference signals sent by the main transceiver.

[0243] It should be understood that when the terminal device determines whether to perform cell handover, it also needs to consider the power headroom situation of the cell. In this regard, the terminal device will regularly receive the second information from the network device to which the cell belongs. For details, please refer to the content of S302.

[0244] It should be understood that the execution order of S301 and S302 is not limited.

[0245] S302. The terminal device receives the second information, and the second information is related to the power headroom of at least one cell.

[0246] At least one cell includes at least one of a serving cell and a neighbor cell, and the neighbor cell includes a target cell. In this step, corresponding to different handover scenarios, the content of the second information received by the terminal device may be different.

[0247] Optionally, the second information indicates the range of the power headroom and / or whether there is a power headroom.

[0248] Optionally, the network device to which the cell belongs includes a first module and a second module for receiving and transmitting information. At least one of the first module and the second module is different in terms 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 second information is related to the power headroom of the second module of the network device to which the cell belongs.

[0249] The power headroom is divided into the power headroom of the network device to which the cell belongs and the power headroom of the beam, and the two may be the same or different.

[0250] In one implementation, the terminal device may receive or update the second information based on one or more of the following methods.

[0251] Method 1: Receive based on SSB.

[0252] Optionally, SSB may be replaced by SSS, CSI-RS, master information block (MIB).

[0253] Method 2: Receive based on SIB.

[0254] The network device to which the cell belongs sends the SIB to the terminal device. The SIB carries the second information, and the second information is broadcast through the SIB.

[0255] Method 3: Receive based on DCI.

[0256] The network device to which the cell belongs sends the DCI to the terminal device. The DCI carries the second information.

[0257] Optionally, DCI may be replaced by media access control control element (MAC CE).

[0258] Method 4: Update based on the indication of the paging short message.

[0259] When the power headroom of the network device to which the cell belongs changes, the network device to which the cell belongs may update the second information through a paging message, and carry it based on a short message scrambled by a paging radio network temporary identifier (P-RNTI).

[0260] Optionally, the upper layer (MAC layer) of the terminal device may determine whether there is a power headroom or the range of the power headroom of the network device to which the cell belongs based on the out-of-sync indication reported by the physical layer and the indication of the existence of the power headroom.

[0261] After the terminal device obtains the first information and the second information, the terminal device may determine whether to initiate a random access or whether to trigger the target cell to adjust the transmission power according to the first information and the second information.

[0262] In one example, the scenarios of cell handover mainly include basic handover, conditional handover, and LTM. For the convenience of description, the steps of this embodiment will be described below in combination with the scenarios.

[0263] I. Basic handover

[0264] In the scenario of basic handover, when the terminal device reports the measurement result to the serving cell, it will simultaneously consider the power headroom of the neighboring cell, so as to avoid the terminal device performing cell handover in advance on the premise that there is still power headroom in the neighboring cell to be handed over, thereby improving the success rate of cell handover.

[0265] In the scenario of basic handover, the main execution process is as follows:

[0266] (1) The terminal device reports the measurement result to the serving cell

[0267] In one implementation, the terminal device receives the fifth information from the neighboring cell, and the fifth information is related to the power headroom of at least one neighboring cell, and the at least one neighboring cell includes the serving cell and / or the target cell.

[0268] The terminal device sends the first information and the fifth information to the serving cell.

[0269] Optionally, the fifth information indicates the range of the power headroom of the target cell and / or whether there is a power headroom in the target cell.

[0270] Optionally, the fifth information indicates the range of the power headroom of the serving cell and / or whether there is a power headroom in the serving cell. Optionally, the fifth information is carried by a synchronization sequence indication, a master information block (MIB) bearer, a system information block (SIB) broadcast, a MAC CE, or a DCI.

[0271] In another implementation, the serving cell receives the fifth information sent from a neighboring cell.

[0272] In this implementation, the fifth information of the neighboring cell does not need to be reported by the terminal device, but is completed based on the interaction between cells. The serving cell can directly receive the fifth information sent from the neighboring cell, and when the fifth information of the neighboring cell changes, the neighboring cell will send the changed fifth information to the serving cell.

[0273] (2) The serving cell determines whether it can perform a handover and whether it needs to trigger the target cell to adjust its transmission power based on the first information and the fifth information.

[0274] After receiving the fifth information and the first information reported by the terminal device, the serving cell has the following two implementation methods.

[0275] In the first implementation method, the serving cell sends the seventh information to the target cell, and the seventh information is used to request the target cell to adjust its transmission power.

[0276] In addition to including the request information for adjusting the transmission power, optionally, the seventh information also carries a recommended power adjustment value.

[0277] After receiving the seventh information, the target cell will reply with a corresponding response message. This response message carries the indication information on whether to perform power adjustment.

[0278] Optionally, this response message also carries a power adjustment value.

[0279] Optionally, this response message also carries the configuration information of the handover signaling sent to the terminal device.

[0280] Optionally, as Figure 4 shown, after the power of the target cell is adjusted, it will trigger the terminal device to report the measurement result again, which is used to assist the serving cell in making a cell handover decision. If the serving cell determines to perform a cell handover, it will send a handover command to the terminal device accordingly.

[0281] In the second implementation method, the serving cell receives a message from the target cell, and the configuration information of the first signal is carried in this message.

[0282] Optionally, this message is a handover response message or other messages.

[0283] In one example, after the terminal device reports the first information to the serving cell, the serving cell sends a handover request to the target cell. The target cell sends a message to the serving cell, and the serving cell sends the configuration information of the first signal carried in this message to the terminal device through a handover command, and the terminal device initiates a random access to the target cell.

[0284] Optionally, the first signal is an uplink wake up signal (UL WUS).

[0285] Optionally, the configuration information of the first signal includes the position, sequence, etc. of the time-frequency resources of the first signal.

[0286] The serving cell sends the configuration information of the first signal to the terminal device, and instructs / triggers the terminal device to send the first signal to the target cell, and the first signal is used to trigger the target cell to adjust the transmission power.

[0287] Optionally, after the power adjustment of the target cell, it will trigger the terminal device to report the measurement result again, which is used to assist the serving cell in making a cell handover decision. If the serving cell determines to perform a cell handover, it will send a handover instruction to the terminal device accordingly.

[0288] Optionally, the terminal device includes a first module and a second module for sending 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 that of the second module. The terminal device sending the first signal to the target cell includes:

[0289] The terminal device sends the first signal to the target cell based on the first module.

[0290] 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 the first signal to the network device based on the first module with lower power consumption, which can further reduce the device power consumption.

[0291] When the terminal device sends the 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.

[0292] It should be understood that the network device includes a first module and a second module for sending 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 that of the second module. In this scenario, the first module is used to ensure coverage and the transmission power is relatively fixed, and the second module is used to provide services for users and the transmission power can be dynamically adjusted. Therefore, on the premise that there is still power margin in the target cell, if the terminal device is still within the coverage range of the first module, the terminal device can trigger the target cell to adjust the transmission power to improve the success rate of cell handover and reduce unnecessary connection reconstruction.

[0293] Optionally, the first network device is the network device to which the target cell belongs. The first 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 that of the second module. After the terminal device sends a first signal to the target cell based on the first module, the first network device receives the first signal based on the first module, and then the first network device adjusts the transmission power of the second module according to the first signal.

[0294] It should be understood that compared with the second module, since the first module has a larger coverage range and lower power consumption, the first network device receives the first signal based on the first module with lower power consumption, which can not only improve the success rate of receiving the first signal, but also reduce the network energy consumption. Since the transmission power of the second module can be dynamically adjusted, after the first network device receives the first signal based on the first module of the terminal device, it can adjust the transmission power of the second module according to the first signal, that is, dynamically adjust the transmission power of the second module according to actual needs to reduce the energy consumption of the second module. On this basis, the first network device communicates with the terminal device based on the adjusted transmission power, thus avoiding the terminal device from performing cell handover in advance.

[0295] Optionally, the terminal device sends a first signal to the target cell based on the second module. Correspondingly, the network device receives the first signal based on the second module, and then adjusts the transmission power of the second module of the target cell according to the first signal.

[0296] It should be understood that in this embodiment, for terminal devices in different states, through the cooperation of the first module and the second module, signal measurements based on different types of signals / transceivers are defined, which can support the mobility management of terminal devices in different states while minimizing network energy consumption.

[0297] II. Conditional Handover

[0298] In the conditional handover scenario, the serving cell (source cell) requests conditional handover configuration from one or more target cells. Correspondingly, the target cell sends a conditional handover response message to the serving cell. The conditional handover response message contains the configuration information of the target cell. Then the serving cell can send the configuration information to the terminal device through an RRC reconfiguration message. The RRC reconfiguration message includes the configuration information related to handover and the information about the execution conditions of conditional handover.

[0299] In this embodiment, the conditional handover response message sent by the target cell to the serving cell includes, in addition to the configuration information related to handover, the configuration information of the first signal. Correspondingly, after the serving cell receives the conditional handover response message, it will carry the configuration information related to handover and the configuration information of the first signal in the RRC reconfiguration message sent to the terminal device.

[0300] Optionally, the configuration information of the first signal includes information such as the time-frequency resource, transmission timing, candidate sequence, or chirp slope of the first signal.

[0301] Optionally, the configuration information of the first signal further includes information on whether there is a power headroom in the target cell and / or the range of the power headroom in the target cell.

[0302] Among them, the information on the execution condition of conditional handover carried in the RRC reconfiguration message is the information of the first condition in this embodiment. After the terminal device receives the information of the first condition, in one implementation:

[0303] S303. When the terminal device determines that the first condition is satisfied based on the first information and the second information, it sends a first signal to the target cell, and the first signal is used to trigger the target cell to adjust the transmission power. Correspondingly, after receiving the first signal, the target cell adjusts the transmission power of the network device to which the cell belongs according to the first signal.

[0304] In this implementation, optionally, at least one cell includes a serving cell and a target cell, and the first condition includes one or more of the following information A to information B.

[0305] Information A. The difference between the sum of the measurement result of the target cell and the power headroom of the target cell and the sum of the measurement result of the serving cell and the power headroom of the serving cell is greater than or equal to a first threshold.

[0306] Information B. The sum of the measurement result of the serving cell and the power headroom of the serving cell is less than a second threshold.

[0307] Information A is mainly determined based on the measurement result of the serving cell (i.e., the signal quality between the terminal device and the network device to which the serving cell belongs), the power headroom of the serving cell, the measurement result of the target cell (i.e., the signal quality between the terminal device and the network device to which the target cell belongs), and the power headroom of the target cell. In Information A, the first threshold can be understood as the threshold / upper limit value of the offset in the A3 event, and the A3 event is that the measurement result of the neighboring cell is better than the measurement result of the serving cell by an offset. In this embodiment, the terminal device simultaneously considers the power headroom of the cell. When the terminal device determines that the difference between the sum of the measurement result of the target cell and the power headroom of the target cell and the sum of the measurement result of the serving cell and the power headroom of the serving cell is greater than or equal to the first threshold, the terminal device sends a first signal to the target cell to request the target cell to increase the transmission power.

[0308] Information B is mainly determined based on the measurement results of the serving cell and the power headroom of the serving cell. In Information B, the second threshold can be understood as the upper limit value of threshold 1 in the A5 event. The A5 event means that the quality of service of the serving cell (i.e., the measurement result) is lower than threshold 1, and the quality of service of the neighboring cell (i.e., the measurement result) is higher than threshold 2. In this embodiment, the terminal device considers the power headroom of the cell at the same time. In one example, after the serving cell sends the measurement signal resource to the terminal device at full power, when the terminal device determines that the sum of the measurement result of the serving cell and the power headroom of the serving cell is less than the second threshold, the terminal device sends a first signal to the target cell to request the target cell to increase the transmission power.

[0309] Optionally, the terminal 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 terms of power consumption, hardware composition, and the waveform of the transmitted signal. The power consumption of the first module is less than that of the second module. The terminal device sending the first signal to the target cell includes: the terminal device sending the first signal to the target cell based on the first module. For specific details, reference can be made to the description in basic handover, which will not be elaborated here.

[0310] After the terminal device sends the first signal to the target cell and the target cell adjusts the transmission power based on the first signal, in one implementation:

[0311] S304. When the terminal device determines that the second condition is satisfied based on the first information and the second information, initiate a random access to the target cell.

[0312] In this implementation, optionally, at least one cell includes the serving cell and the target cell, and the second condition includes one or more of the following Information A to Information B.

[0313] Information A. The sum of the measurement result of the serving cell and the power headroom of the serving cell is less than the second threshold, and the sum of the measurement result of the target cell and the power headroom of the target cell is greater than or equal to the third threshold.

[0314] Information B. The sum of the measurement result of the target cell and the power headroom of the target cell is greater than or equal to the third threshold.

[0315] In Information A, the third threshold can be understood as the upper limit value of threshold 2 in the A5 event. The A5 event means that the quality of service of the serving cell (i.e., the measurement result) is lower than threshold 1, and the quality of service of the neighboring cell (i.e., the measurement result) is higher than threshold 2. In this embodiment, the terminal device considers the power headroom of the cell at the same time. After the target cell adjusts the transmission power, if the terminal device determines that Information A is satisfied, initiate a random access to the target cell.

[0316] It should be understood that the third threshold may also be the threshold corresponding to the threshold in other events, which can be specifically set according to actual requirements and will not be limited here.

[0317] It should be understood that after the target cell adjusts the transmit power, if the terminal device determines that the second condition is met, it indicates that the transmit power of the target cell has exceeded the adjustable maximum range. At this time, the terminal device will initiate a random access to the target cell to avoid the terminal device performing a cell handover in advance.

[0318] III. LTM

[0319] In the scenario of LTM, the serving cell (source cell) will carry the configuration information of the LTM candidate cell in the RRC signaling in advance. Optionally, the terminal device can complete the uplink and downlink synchronization with the target cell in advance (such as receiving the downlink synchronization signal and sending the uplink preamble).

[0320] In the cell handover execution phase of LTM, the terminal device reports a measurement report based on the physical layer or layer 1 to the serving cell, and the measurement report includes the measurement results of neighboring cells. The serving cell makes a decision based on the measurement results, and when it determines to perform a cell handover, it sends a cell handover instruction to the terminal device to instruct the terminal device to perform a cell handover. The terminal device initiates a random access to the target cell based on the cell handover instruction. After the terminal device completes the access, the target cell will send an RRC reconfiguration complete message to the terminal device to indicate that the cell handover is completed.

[0321] In this embodiment, improvements are made to the configuration information of the LTM candidate cell sent by the serving cell, the uplink synchronization between the terminal device and the target cell, the measurement report reported by the terminal device, and the process after the terminal device receives the cell handover instruction, which are specifically as follows.

[0322] 1. Configuration information of the LTM candidate cell sent by the serving cell

[0323] In one implementation, S305. The terminal device receives the fifth information from the serving cell, and the fifth information is used to indicate the adjustment information of the transmit power of the serving cell and / or the target cell, and / or the fifth information is used to indicate the power headroom information of the serving cell and / or the target cell.

[0324] It should be understood that the terminal device can detect / determine that the transmission power of the serving cell and / or the target cell is adjusted, and / or the power headroom information of the serving cell and / or the target cell. Information on the transmission power of the reference signals corresponding to all candidate cells is added to the configuration information of the LTM candidate cells sent by the serving cell to the terminal device, where the reference signals include CSI-RS, SSB, etc. When the transmission power of the reference signal corresponding to the target cell is adjusted, the serving cell sends the fifth information to the terminal device. The terminal device determines that the transmission power of the target cell is adjusted and / or the adjustment value of the transmission power based on the fifth information.

[0325] Optionally, the power headroom information of the target cell indicates the range of the power headroom of the target cell and / or whether the power headroom of the target cell exists.

[0326] Optionally, the power headroom information of the serving cell indicates the range of the power headroom of the serving cell and / or whether the power headroom of the serving cell exists.

[0327] Optionally, the fifth information is carried by a synchronization sequence indication, a master information block (MIB), broadcast by a system information block (SIB), or carried by a MAC CE or DCI.

[0328] Optionally, the adjustment information for indicating the transmission power of the serving cell and / or the target cell and the power headroom information for indicating the serving cell and / or the target cell can be transmitted by the same information (the fifth information) or the same message, or can be transmitted by different information (such as the fifth information and the sixth information) or different messages.

[0329] In one example, the MAC CE contains the ID or index of the cell and the indication information for the adjusted transmission power, and the indication information can include information on whether the transmission power is adjusted and / or the adjustment value of the transmission power.

[0330] Optionally, the serving cell can also carry the fifth information by the second-level DCI in the two-level DCI.

[0331] 2. Uplink Synchronization between the Terminal Device and the Target Cell

[0332] In one implementation, in S306. The terminal device receives the fourth information from the serving cell. The fourth information includes the configuration information of the second signal, and the second signal is used for uplink synchronization.

[0333] Optionally, the second signal is different from the first signal in at least one of time-frequency resources, sequences, and chirp slopes, and the first signal is used to trigger the target cell to adjust the transmission power.

[0334] It should be understood that in addition to supporting the terminal device to send a preamble to the serving cell to complete uplink synchronization, in this embodiment, the terminal device is also supported to complete uplink synchronization based on the second signal. Correspondingly, the configuration information of the LTM candidate cell sent by the serving cell includes the configuration information of the first signal and the second signal, where the first signal is used to trigger the target cell to adjust the transmit power, and the second signal is used to trigger the terminal device to complete early synchronization with the target cell.

[0335] Optionally, at least one of the time-frequency resources, sequences, and chirp slopes of the second signal is different from those of the first signal. Among them, the different sequences include different preambles or different chirps.

[0336] Optionally, the second signal is UL WUS. The second signal is different from the first signal in one or more of the time-frequency resources, signals, or preamble sequences.

[0337] 3. The terminal device reports a measurement report

[0338] In this embodiment, in addition to including the measurement results of neighboring cells in the layer 1 measurement report reported by the terminal device to the serving cell, optionally, the power headroom of the neighboring cell (the network device to which the neighboring cell belongs) is also included.

[0339] In one implementation, the terminal device reports the measurement results of neighboring cells and the power headroom of neighboring cells to the serving cell.

[0340] In one implementation, in the configuration information configured by the serving cell for the terminal device regarding L1 measurement reporting, a virtual reporting switch is included. After the virtual reporting switch is turned on, the terminal device reports to the serving cell the channel quality indicator (CQI) corresponding to when the serving cell and / or candidate cell send signals at full power.

[0341] In this implementation, the CQI value reported by the terminal device to the serving cell is not the actually measured CQI value, but the CQI value corresponding to the assumption that the serving cell and / or candidate cell send signals at full power.

[0342] It should be understood that based on the CQI value corresponding to when the serving cell and / or candidate cell send signals at full power as the decision basis for the serving cell, so that the terminal device decides whether to perform cell handover based on the signal quality in the optimal case. On this basis, the terminal device can determine whether to trigger the serving cell and / or candidate cell to increase the transmit power to improve the signal quality, so as to improve the success rate of cell handover.

[0343] 4. The process after the terminal device receives the cell handover instruction

[0344] In one implementation, in S307, when the terminal device receives the third information from the serving cell and the measurement result of the target cell is less than the fourth threshold, the terminal device sends a first signal to the target cell. The third information is used to indicate to perform cell handover, and the first signal is used to trigger the target cell to adjust its transmission power.

[0345] After the terminal device receives the third information from the serving cell, if it determines that the measurement result of the target cell is less than the fourth threshold, it indicates that the transmission power of the target cell / the network device to which the target cell belongs is relatively low. The terminal device sends a first signal to the target cell to trigger the target cell / the network device to which the target cell belongs to adjust its transmission power.

[0346] Optionally, the terminal device includes a first module and a second module for receiving and transmitting 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. The terminal device sending the first signal to the target cell includes: the terminal device sending the first signal to the target cell based on the first module. For details, refer to the description in the basic handover, which will not be elaborated here.

[0347] In another implementation, in S308, when the terminal device receives the third information from the serving cell and the measurement result of the target cell is greater than or equal to the fourth threshold, the terminal device initiates a random access to the target cell. The third information is used to indicate to perform cell handover.

[0348] If the terminal device determines that the measurement result of the target cell is greater than or equal to the fourth threshold, it indicates that the transmission power of the target cell / the network device to which the target cell belongs has exceeded the maximum adjustable range. In the case where the transmission power of the target cell / the network device to which the target cell belongs cannot be further adjusted, the terminal device will initiate a random access to the target cell to avoid the terminal device performing cell handover in advance and reducing energy consumption loss.

[0349] It should be understood that the fourth threshold can be understood as a threshold / limit for determining the quality of the signal. The fourth threshold can be set according to actual requirements. If the terminal device detects that the measurement result of the target cell (i.e., the signal quality between the terminal device and the target cell) is less than the fourth threshold, it indicates that the signal of the second module corresponding to the network device (the second network device) to which the target cell belongs is weak. On this basis, when the terminal device receives the third information, the terminal device sends a first signal to the target cell to trigger the target cell to adjust its transmission power. And when the terminal device detects that the measurement result of the target cell is greater than or equal to the fourth threshold, it indicates that the transmission power of the target cell has reached the point where the terminal device initiates a random access to the target cell.

[0350] The scenarios of cell selection and / or cell reselection are described below.

[0351] In one implementation, S309. The terminal device receives the configuration information of the third signal from the serving cell based on the first module, and performs cell selection and / or cell reselection based on the measurement result of the third signal.

[0352] It should be understood that since the power consumption of the first module is less than that of the second module, generally, the signal coverage range of the first module is greater than that of the second module. When the terminal device performs cell selection and / or cell reselection, receiving the configuration information of the third signal based on the first module can not only improve the reception success rate, but also reduce the network energy consumption.

[0353] In the architecture where the network device of the cell includes the first module and the second module, since the transmission power of the signal transmitted by the first module is relatively fixed and is used to ensure coverage, cell selection and cell reselection are detected based on the signal sent by the base station low-power transceiver, such as the chirp-based signal, such as the chirp-based synchronization signal, or the chirp-based measurement signal, and the configuration information of the measurement signal can be broadcast through the system message.

[0354] Considering that during the busy hours of the network, the coverage range of the second module is comparable to that of the first module. In this scenario, for better flexibility, the measurement signal for cell selection and cell reselection can also be based on the signal sent by the second module, such as the SSB or synchronization signal in NR or 6G, and the configuration information of the measurement signal can be broadcast through the system message.

[0355] To enable the above two scenarios, taking the first module as the LR and the second module as the MR as an example, optionally, the SIB message can configure the measurement signal for cell reselection in the way of choice, that is: based on the measurement signal sent by the LR, or based on the measurement signal sent by the MR; the signal sent by the LR can be the chirp-based synchronization signal, and the signal sent by the MR can be the OFDM-based synchronization signal.

[0356] This embodiment also provides a communication method. Please refer to Figure 5 , Figure 5 which is another schematic diagram of the implementation of the communication method provided by the embodiment of the present application. The method includes the following steps. It should be noted that in Figure 5 , taking the terminal device and the network device of the cell as the execution entities of this interaction schematic as an example to illustrate the method, but the present application does not limit the execution entities of this interaction schematic. For example, in Figure 5 , the execution entity of the method can be replaced by a chip, a chip system, a processor, a logic module, or software in the terminal device or the network device.

[0357] Figure 5 It is mainly for the transmission of paging messages. The paging includes not only the paging messages sent by the upper layer of the terminal device, but also the transmission of short messages. The uses of short messages defined in NR include: system message change, earthquake and tsunami warning system (ETWS) notification and / or commercial mobile alert system (CMAS) notification, paging stop indication, system message change notification for configuring eDRX terminal devices. eDRX is extended discontinuous reception (DRX), and each eDRX cycle includes multiple DRX cycles.

[0358] Optionally, the paging refers to the information that needs to be indicated or scheduled based on the DCI scrambled by P-RNTI.

[0359] Optionally, the paging can indicate only the short message, or only the relevant resource information carrying the paging message, or both the short message and the paging message.

[0360] In this method, the second network device is the network device to which the serving cell belongs. The second network device includes a first module and a second module for sending and receiving information. The terminal device includes a first module and a second module for sending 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 that of the second module.

[0361] The first module is used to ensure coverage, and its transmission power is relatively fixed. The transmission power of the second module can be dynamically adjusted according to actual requirements. Considering that when a terminal device in the idle state or inactive state moves, it may cause the cell to fail to obtain the location of the terminal device in time, resulting in the terminal device possibly moving out of the coverage area of the second module. Therefore, in the architecture where the cell has LR and MR, the paging message is sent through LR. Correspondingly, the terminal device also needs to receive it through the corresponding module. For example, the network side sends a paging message through LR, and the paging message is carried by a chirp signal. Correspondingly, the terminal device also needs to complete the reception of the paging message based on the chirp signal, that is, the terminal device side also needs to perform paging reception based on the low-power module. If the terminal device performs paging reception based on the first module, the terminal device receives a low power wake up signal (LP-WUS) through the first module. Taking the first module as LR and the second module as MR as an example. The steps include:

[0362] S501. The second network device sends a wake-up signal to the terminal device based on the first module.

[0363] S502. The terminal device receives the wake-up signal from the serving cell based on the first module.

[0364] According to the different information carried in the wake-up signal sent by the second network device, when the terminal device receives the wake-up signal, the behavior of the terminal device to wake up the MR is different.

[0365] Optionally, if the sub-group information is carried in the LP-WUS, after the MR of the terminal device wakes up, it continues to perform listening during the paging occasion to confirm whether there is a paging message for itself.

[0366] Optionally, if the group information is carried in the LP-WUS, the MR of the terminal device wakes up and performs a paging early indication (PEI) to confirm whether it needs to continue listening during the subsequent paging occasion.

[0367] Optionally, if the specific identification (ID) of the terminal device is carried in the LP-WUS, after the MR of the terminal device wakes up, it will initiate a random access process through the MR to establish a connection with the network (such as sending a preamble).

[0368] Due to the dynamic adjustment of the transmission power of the MR of the second network device, after the terminal device receives the LR wake-up signal, it wakes up the MR for further transceiver. However, since there may be a scenario where the transmission power of the second network device is insufficient to cover the terminal device, the MR of the terminal device cannot perform the above actions, that is, monitor at the paging occasion and paging advance indication occasion, or initiate random access.

[0369] Therefore, in this embodiment, as Figure 6 shown, when the terminal device receives the low-power wake-up signal, the terminal device wakes up the MR, measures the signal quality based on the MR, and decides whether to trigger the transmission of the first signal based on the comparison between the measurement result and the fifth threshold. The terminal device can also obtain an indication of the power headroom of the serving cell, such as through a synchronization sequence or MIB indication, to obtain the presence and / or range of the power headroom.

[0370] S503. The terminal device obtains the measurement result of the fourth signal based on the second module.

[0371] Optionally, the fourth signal is a synchronization signal.

[0372] S504. The terminal device determines whether the measurement result of the fourth signal is less than the fifth threshold. If so, S505 to S506 are executed; if not, S507 to S508 are executed.

[0373] Optionally, the fifth threshold is predefined by the protocol.

[0374] Optionally, the fifth threshold is obtained through an SIB message or RRC dedicated signaling.

[0375] If the received signal quality of the MR (i.e., the measurement result of the fourth signal) is lower than the threshold, the terminal device will trigger the transmission of the first signal to trigger the serving cell to increase the transmission power.

[0376] S505. The terminal device sends a first signal to the serving cell, and the first signal is used to trigger the serving cell to adjust the transmission power.

[0377] Optionally, the first signal can be sent through the first module of the terminal device.

[0378] Optionally, the first signal can also be sent through the second module of the terminal device.

[0379] Optionally, the first signal is UL WUS.

[0380] For the case where the above LP-WUS carries sub-group information / group information:

[0381] In one implementation, for the multi-beam scenario, the UL WUS can also carry beam information in an explicit or implicit manner. For example: the beam ID is explicitly carried in the UL WUS, or the beam associated with it can be implicitly obtained through the transmission time of the UL WUS. Another example: the LP-WUSs of different beams are transmitted in a time-division manner in the time domain, and each LP-WUS is associated with a UL WUS resource, such as corresponding one-to-one in the time domain, or corresponding to different UL WUS frequency domain resources, so that the base station can obtain the beam indicated by the terminal device through the reception of the UL WUS.

[0382] In another implementation, considering that the terminal device may send a UL WUS after receiving the LP-WUS, the time interval T between the terminal device's reception of the LP-WUS and the reception of the paging message / PEI monitoring needs to be greater than a threshold, which can be predefined by the protocol, to ensure that paging reception or PEI reception is after the UL WUS transmission opportunity.

[0383] For the case where the specific identifier of the terminal device is carried in the above LP-WUS:

[0384] In one implementation, the identifier information of the terminal device is carried in the UL WUS. After the terminal device sends the UL WUS, the terminal device correspondingly receives a random access response (RAR), that is, in this scenario, the first step of the random access process changes from sending a preamble to sending a UL WUS.

[0385] Considering the transmission power adjustment and effectiveness of the second network device, after the terminal device sends the UL WUS, the start position of the RAR reception window can be later than the RAR start window position in the normal random access scenario. For example, in the normal random access scenario, after the terminal device sends a preamble, it starts to monitor the RAR at time n, while in this embodiment, after the terminal device sends the UL WUS, it starts to monitor the RAR at time m, where m is greater than n.

[0386] In another implementation, when the measurement result of the fourth signal is greater than or equal to the fifth threshold, the terminal will send a preamble based on the random access channel (RACH) configuration provided in the SIB message.

[0387] S506. The second network device adjusts the transmission power of the second network device according to the first signal.

[0388] If the measurement result of the fourth signal is greater than or equal to the fifth threshold, the terminal device will perform paging or PEI reception based on MR, or send a physical random access channel (PRACH) to the serving cell.

[0389] S507. The terminal device sends or receives a signal based on the second module.

[0390] S508. The second network device sends or receives a signal based on the second module.

[0391] It should be understood that since the power consumption of the first module is less than that of the second module, the transmission power of the first module is relatively fixed. Generally, the signal coverage range of the first module is greater than that of the second module, and it is generally used to ensure coverage. The transmission power of the second module can be dynamically adjusted. Considering that the terminal device in the idle state or inactive state may move out of the coverage range of the second module, the terminal device receives the wake-up signal based on the first module, which can timely obtain the location of the terminal device. Compared with receiving the wake-up signal based on the second module, it also further reduces the network energy consumption. After the terminal device wakes up the second module based on the wake-up signal, when the measurement result of the fourth signal is less than the fifth threshold, the terminal device is triggered to send the first signal, which avoids the terminal device from performing cell handover in advance and also further reduces the network energy consumption.

[0392] Among them, the fifth threshold can be understood as the threshold of the signal quality corresponding to the signal received by the terminal device, and this signal is sent by the second network device based on the second module. The terminal device determines whether to trigger the sending of the first signal by comparing the measurement result of the fourth signal with the fifth threshold.

[0393] Regarding the first threshold to the fifth threshold mentioned in this embodiment, optionally, the terminal device determines one or more of the first threshold, the second threshold, the third threshold, the fourth threshold, the fifth threshold, or the configuration information of the first signal based on the eighth information configured by the second network device.

[0394] Among them, the eighth information is used to configure at least one of the following information:

[0395] The first threshold corresponding to the difference between the sum of the measurement result of the target cell and the power headroom of the target cell and the sum of the measurement result of the serving cell and the power headroom of the serving cell, the second threshold corresponding to the sum of the measurement result of the serving cell and the power headroom of the serving cell, the third threshold corresponding to the sum of the measurement result of the target cell and the power headroom of the target cell, the fourth threshold corresponding to the measurement result of the target cell, or the fifth threshold corresponding to the measurement result of the fourth signal.

[0396] Optionally, the eighth information is further used to configure the configuration information of the first signal. Optionally, the eighth information can be carried by at least one of the following: system message, RRC signaling, MAC CE, or predefined.

[0397] Please refer to Figure 7 , an embodiment of the present application provides a communication device 700. The communication device 700 can implement the functions of the terminal device, the first network device, or the second network device in the foregoing method embodiments, and thus can also achieve the beneficial effects of the foregoing method embodiments. In the embodiment of the present application, the communication device 700 can be a terminal device (or the first network device or the second network device), or an integrated circuit or component inside the terminal device (or the first network device or the second network device), such as a chip.

[0398] It should be noted that the transceiver unit 702 can include a sending unit and a receiving unit, which are respectively used to perform sending and receiving.

[0399] In a possible implementation manner, when the device 700 is used to execute the method performed by the terminal device in the foregoing embodiment, the device 700 includes a processing unit 701 and a transceiver unit 702; the processing unit 701 is used to obtain first information, and the first information includes measurement results of at least one cell; the transceiver unit 702 is used to receive second information, and the second information is related to the power headroom of at least one cell; the processing unit 701 is further used to send a first signal to the target cell when the first information and the second information meet a first condition, and the first signal is used to trigger the target cell to adjust the transmit power; the processing unit 701 is further used to initiate a random access to the target cell when the first information and the second information meet a second condition.

[0400] In a possible implementation manner, when the device 700 is used to execute the method performed by the terminal device in the foregoing embodiment, the device 700 includes a processing unit 701 and a transceiver unit 702; the processing unit 701 is used to receive a wake-up signal from the serving cell based on a first module; the processing unit 701 is used to obtain a measurement result of a fourth signal based on a second module; the transceiver unit 702 is used to send a first signal to the serving cell when the measurement result of the fourth signal is less than a fifth threshold, and the first signal is used to trigger the serving cell to adjust the transmit power; the transceiver unit 702 is used to send or receive a signal based on the second module when the measurement result of the fourth signal is greater than or equal to the fifth threshold.

[0401] In a possible implementation manner, when the device 700 is used to execute the method performed by the first network device in the foregoing embodiment, the device 700 includes a processing unit 701 and a transceiver unit 702; the transceiver unit 702 is used to receive a first signal; the processing unit 701 is used to adjust the transmit power of the first network device according to the first signal.

[0402] In a possible implementation, when the device 700 is used to execute the method performed by the second network device in the foregoing embodiment, the device 700 includes a transceiver unit 702; the transceiver unit 702 is configured to send eighth information to a terminal device, and the eighth information is used to configure one or more of a first threshold, a second threshold, a third threshold, a fourth threshold, a fifth threshold, or configuration information of a first signal.

[0403] It should be noted that for the information execution process and the like of the units of the foregoing communication device 700, reference may be specifically made to the description in the method embodiments shown in the foregoing of this application, and details are not described herein again.

[0404] Please refer to Figure 8 , which is another schematic structural diagram of the communication device 800 provided in this application. The communication device 800 includes a logic circuit 801 and an input / output interface 802. Among them, the communication device 800 may be a chip or an integrated circuit.

[0405] Among them, Figure 7 the shown transceiver unit 702 may be a communication interface, and this communication interface may be Figure 8 the input / output interface 802 in , and the input / output interface 802 may include an input interface and an output interface. Alternatively, this communication interface may also be a transceiver circuit, and this transceiver circuit may include an input interface circuit and an output interface circuit.

[0406] Optionally, the logic circuit 801 is configured to obtain first information, and the first information includes measurement results of at least one cell; the input / output interface 802 is configured to receive second information, and the second information is related to the power headroom of at least one cell; the logic circuit 801 is further configured to send a first signal to a target cell when the first information and the second information meet a first condition, and the first signal is used to trigger the target cell to adjust its transmission power; the logic circuit 801 is further configured to initiate a random access to the target cell when the first information and the second information meet a second condition.

[0407] Optionally, the logic circuit 801 is configured to receive a wake-up signal from a serving cell based on a first module; the logic circuit 801 is configured to obtain a measurement result of a fourth signal based on a second module; the input / output interface 802 is configured to send a first signal to the serving cell when the measurement result of the fourth signal is less than a fifth threshold, and the first signal is used to trigger the serving cell to adjust its transmission power; the input / output interface 802 is configured to send or receive a signal based on the second module when the measurement result of the fourth signal is greater than or equal to the fifth threshold.

[0408] Optionally, the input / output interface 802 is configured to receive a first signal; the logic circuit 801 is configured to adjust the transmission power of the first network device according to the first signal.

[0409] Optionally, the input / output interface 802 is configured to send an eighth piece of information to a terminal device, where the eighth piece of information is used to configure one or more of a first threshold, a second threshold, a third threshold, a fourth threshold, a fifth threshold, or configuration information of a first signal.

[0410] Wherein, the logic circuit 801 and the input / output interface 802 may also perform other steps performed by the first communication device or the second communication device in any of the embodiments and achieve corresponding beneficial effects, which will not be elaborated herein.

[0411] In a possible implementation manner, Figure 7 the shown processing unit 701 may be Figure 8 the logic circuit 801 in

[0412] Optionally, the logic circuit 801 may be a processing device, and the functions of the processing device may be implemented partially or entirely by software. Among them, the functions of the processing device may be implemented partially or entirely by software.

[0413] Optionally, the processing device may include a memory and a processor. 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 of the method embodiments.

[0414] Optionally, the processing device may include a processor. The memory for storing the computer program is located outside the processing device, and the processor is connected to the memory through a circuit / wire to read and execute the computer program stored in the memory. Among them, the memory and the processor may be integrated together, or may also be physically independent of each other.

[0415] 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 processing circuits (DSPs), microcontroller units (MCUs), programmable logic devices (PLDs), or other integrated chips, or any combination of the above chips or processors, etc.

[0416] Please refer to Figure 9 , for the communication device 900 involved in the above embodiments provided by the embodiments of the present application. The communication device 900 may specifically be the communication device serving as a terminal device in the above embodiments. Figure 9 The example shown is implemented by the terminal device (or components in the terminal device).

[0417] Among them, a possible schematic logical structure of the communication device 900 is shown. The communication device 900 may include, but is not limited to, at least one processor 901 and a communication port 902.

[0418] Among them, Figure 7 The shown transceiver unit 702 may be a communication interface, and this communication interface may be Figure 9 the communication port 902 in

[0419] Further optionally, the device may further include at least one of a memory 903 and a bus 904. In the embodiments of the present application, the at least one processor 901 is used to control and process the operations of the communication device 900.

[0420] In addition, the processor 901 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in connection 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 digital signal processor and a microprocessor, and so on. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein.

[0421] It should be noted that Figure 9 the communication device 900 shown can specifically be used to implement the steps implemented by the terminal device in the foregoing method embodiments and achieve the technical effects corresponding to the terminal device. Figure 9 For the specific implementation manners of the communication device shown, reference can be made to the descriptions in the foregoing method embodiments, and details will not be repeated here one by one.

[0422] Please refer to Figure 10 FIG. 1000 is a schematic structural diagram of the communication device involved in the above embodiments provided by the embodiments of the present application. The communication device 1000 may specifically be the communication device acting as a network device in the above embodiments. Figure 10 The example shown is implemented by a network device (or a component in the network device). Among them, the structure of the communication device can refer to Figure 10 the structure shown.

[0423] The communication device 1000 includes at least one processor 1011 and at least one network interface 1014. Further optionally, the communication device further includes at least one memory 1012, at least one transceiver 1013, and one or more antennas 1015. The processor 1011, the memory 1012, the transceiver 1013, and the network interface 1014 are connected, for example, through a bus. In the embodiments of the present application, this connection may include various interfaces, transmission lines, or buses, etc., and this embodiment does not make any limitations in this regard. The antenna 1015 is connected to the transceiver 1013. The network interface 1014 is used to enable the communication device to communicate with other communication devices through a communication link. For example, the network interface 1014 may include a network interface between the communication device and a core network device, such as an S1 interface. 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.

[0424] Among them, Figure 7 the transceiver unit 702 shown may be a communication interface, and this communication interface may beFigure 10 The network interface 1014 therein, which may include an input interface and an output interface. Alternatively, the network interface 1014 may also be a transceiver circuit, which may include an input interface circuit and an output interface circuit.

[0425] The processor 1011 is mainly used to process communication protocols and communication data, and to control the entire communication device, execute software programs, and process the data of software programs, for example, to support the communication device to perform the actions described in the embodiments. The communication device may include a baseband processor and a central processor. The baseband processor is mainly used to process communication protocols and communication data, and the central processor is mainly used to control the entire terminal device, execute software programs, and process the data of software programs. Figure 10 The processor 1011 therein may integrate the functions of the baseband processor and the central processor. Those skilled in the art can understand that the baseband processor and the central processor may also be independent processors, interconnected through technologies such as a bus. Those skilled in the art can understand that the terminal device may include multiple baseband processors to adapt to different network modes, the terminal device may include multiple central processors to enhance its processing ability, and various components of the terminal device may be connected through various buses. The baseband processor may also be referred to as a baseband processing circuit or a baseband processing chip. The central processor may also be referred to as a central processing circuit or a central processing chip. The function of processing communication protocols and communication data may be built into the processor or stored in the memory in the form of a software program, and the processor executes the software program to implement the baseband processing function.

[0426] The memory is mainly used to store software programs and data. The memory 1012 may exist independently and be connected to the processor 1011. Optionally, the memory 1012 may be integrated with the processor 1011, for example, integrated within a single chip. Among them, the memory 1012 can store the program code for implementing the technical solution of the embodiments of the present application and be controlled by the processor 1011 to execute. Various types of computer program codes being executed can also be regarded as the driver programs of the processor 1011.

[0427] Figure 10 Only one memory and one processor are shown. 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, etc. The memory may be a storage element on the same chip as the processor, that is, an on-chip storage element, or an independent storage element, and the embodiments of the present application do not limit this.

[0428] The transceiver 1013 can be used to support the reception or transmission of radio frequency signals between a communication device and a terminal. The transceiver 1013 can be connected to the antenna 1015. The transceiver 1013 includes a transmitter Tx and a receiver Rx. Specifically, one or more antennas 1015 can receive radio frequency signals. The receiver Rx of the transceiver 1013 is used to receive the radio frequency signals from the antenna, convert the radio frequency signals into digital baseband signals or digital intermediate frequency signals, and provide the digital baseband signals or digital intermediate frequency signals to the processor 1011 so that the processor 1011 can perform further processing on the digital baseband signals or digital intermediate frequency signals, such as demodulation processing and decoding processing. In addition, the transmitter Tx in the transceiver 1013 is also used to receive the modulated digital baseband signals or digital intermediate frequency signals from the processor 1011, convert the modulated digital baseband signals or digital intermediate frequency signals into radio frequency signals, and transmit the radio frequency signals through one or more antennas 1015. Specifically, the receiver Rx can selectively perform one-stage or multi-stage down-conversion processing and analog-to-digital conversion processing on the radio frequency signals to obtain digital baseband signals or digital intermediate frequency signals, and the order of the down-conversion processing and the analog-to-digital conversion processing can be adjusted. The transmitter Tx can selectively perform one-stage or multi-stage up-conversion processing and digital-to-analog conversion processing on the modulated digital baseband signals or digital intermediate frequency signals to obtain radio frequency signals, and the order of the up-conversion processing and the digital-to-analog conversion processing can be adjusted. Digital baseband signals and digital intermediate frequency signals can be collectively referred to as digital signals.

[0429] The transceiver 1013 can also be referred to as a transceiver unit, a transceiver, a transceiver device, etc. Optionally, the devices used to implement the receiving function in the transceiver unit can be regarded as a receiving unit, and the devices used to implement the transmitting function in the transceiver unit can be regarded as a transmitting unit, that is, the transceiver unit includes a receiving unit and a transmitting unit. The receiving unit can also be referred to as a receiver, an input port, a receiving circuit, etc., and the transmitting unit can be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0430] It should be noted that Figure 10 The illustrated communication device 1000 can specifically be used to implement the steps implemented by the network device in the foregoing method embodiments and achieve the corresponding technical effects of the network device. Figure 10 For the specific implementation manners of the illustrated communication device 1000, reference can be made to the descriptions in the foregoing method embodiments, and details are not described herein again.

[0431] Please refer to Figure 11 , which is a schematic structural diagram of the communication device involved in the foregoing embodiments provided by the embodiments of the present application.

[0432] It can be understood that the communication device 110 includes, for example, modules, units, components, circuits, or interfaces, etc., which are appropriately configured together to execute the technical solutions provided in this application. The communication device 110 may be the terminal device or network device described above, or a component (such as a chip) in these devices, for implementing the methods described in the following method embodiments. The communication device 110 includes one or more processors 111. The processor 111 may be a general-purpose processor or a dedicated processor, etc. For example, it may be a baseband processor or a central processor. The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control the communication device (such as a RAN node, a terminal, or a chip, etc.), execute software programs, and process the data of software programs.

[0433] Optionally, in one design, the processor 111 may include a program 113 (sometimes also referred to as code or instructions), and the program 113 may be run on the processor 111, such that the communication device 110 executes the methods described in the following embodiments. In another possible design, the communication device 110 includes a circuit ( Figure 11 not shown).

[0434] Optionally, the communication device 110 may include one or more memories 112, on which there is a program 114 (sometimes also referred to as code or instructions), and the program 114 may be run on the processor 111, such that the communication device 110 executes the methods described in the above method embodiments.

[0435] Optionally, the processor 111 and / or the memory 112 may include AI modules 117, 118, and the AI modules are used to implement AI-related functions. The AI modules may be implemented in a software, hardware, or software-hardware combination manner. For example, the AI modules may include a radio intelligence control (RIC) module. For example, the AI modules may be near-real-time RIC or non-real-time RIC.

[0436] Optionally, data may also be stored in the processor 111 and / or the memory 112. The processor and the memory may be provided separately or integrated together.

[0437] Optionally, the communication device 110 may further include a transceiver 115 and / or an antenna 116. The processor 111 is sometimes also referred to as a processing unit, which controls the communication device (such as a RAN node or a terminal). The transceiver 115 is sometimes also referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and is used to implement the transceiver function of the communication device through the antenna 116.

[0438] Among them, Figure 7 the processing unit 701 shown may be the processor 111. Figure 7 the transceiver unit 702 shown may be a communication interface, and this communication interface may be Figure 11 the transceiver 115 in [reference], and this transceiver 115 may include an input interface and an output interface. Alternatively, this transceiver 115 may also be a transceiver circuit, and this transceiver circuit may include an input interface circuit and an output interface circuit.

[0439] The embodiments of the present application also provide 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 manners of the first communication device or the second communication device in the foregoing embodiments.

[0440] The embodiments of the present application also provide a computer program product (or computer program). When the computer program product is executed by the processor, the processor executes the method in the possible implementation manners of the above-mentioned first communication device or second communication device.

[0441] The embodiments of the present application also provide a chip system, which includes at least one processor and is used to support the communication device to implement the functions involved in the possible implementation manners of the above-mentioned communication device. Optionally, the chip system further includes an interface circuit, and the interface circuit provides program instructions and / or data for the at least one processor. In a possible design, the chip system may further include a memory, which is used to store the necessary program instructions and data of the communication device. The chip system may be composed of chips or may include chips and other discrete devices, where the communication device may specifically be the first communication device or the second communication device in the foregoing method embodiments.

[0442] The embodiments of the present application also provide a communication system, and the network system architecture includes the first communication device and the second communication device in any of the above embodiments.

[0443] In several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point, the displayed or discussed couplings or direct couplings or communication connections to each other may be through some interfaces, and the indirect couplings or communication connections of devices or units may be in electrical, mechanical, or other forms.

[0444] The unit described as a separation component may or may not be physically separated. The component shown as a unit may or may not be a physical unit, that is, it may be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0445] In addition, each functional unit in various embodiments of the present application can be integrated into a processing unit, or each unit can exist physically alone, 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 such an understanding, the technical solution of the present application, in essence, or the part that makes a contribution, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium 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 methods described in various embodiments of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

Claims

1. A communication method, characterized in that, The method is applied to a terminal device, and the method includes: Obtain first information, where the first information includes measurement results of at least one cell; Receive second information, where the second information is related to the power headroom of the at least one cell; When the first information and the second information meet a first condition, send a first signal to a target cell, where the first signal is used to trigger the target cell to adjust its transmission power; When the first information and the second information meet a second condition, initiate a random access to the target cell.

2. The method according to claim 1, characterized in that The at least one cell includes a serving cell and the target cell, and the first condition includes at least one of the following: The difference between the sum of the measurement result of the target cell and the power headroom of the target cell and the sum of the measurement result of the serving cell and the power headroom of the serving cell is greater than or equal to a first threshold; or, The sum of the measurement result of the serving cell and the power headroom of the serving cell is less than a second threshold; or, Receive third information of the serving cell, and the measurement result of the target cell is less than a fourth threshold, where the third information is used to indicate performing a cell handover.

3. The method according to claim 1, wherein The at least one cell includes a serving cell and a target cell, and the second condition includes at least one of the following: The sum of the measurement result of the serving cell and the power headroom of the serving cell is less than a second threshold, and the sum of the measurement result of the target cell and the power headroom of the target cell is greater than or equal to a third threshold; or, The sum of the measurement result of the target cell and the power headroom of the target cell is greater than or equal to a third threshold; or, Receive third information of the serving cell, and the measurement result of the target cell is greater than or equal to a fourth threshold, where the third information is used to indicate performing a cell handover.

4. The method according to any one of claims 1 to 3, 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 target cell includes: Based on the first module, send the first signal to the target cell.

5. The method according to any one of claims 1 to 4, characterized in that The method further includes: Receive fourth information of the serving cell, where the fourth information includes configuration information of a second signal, the second signal is used for uplink synchronization, and the second signal is different from the first signal in at least one of time-frequency resources, sequences, and chirp slopes. The first signal is used to trigger the target cell to adjust its transmission power.

6. The method according to any one of claims 1 to 5, characterized in that The method for obtaining an adjustment of the transmission power of the serving cell and / or the target cell includes: Receive fifth information from the serving cell, where the fifth information is used to indicate adjustment information of the transmission power of the serving cell and / or the target cell, and / or the fifth information is used to indicate power headroom information of the serving cell and / or the target cell.

7. The method according to claim 6, wherein The fifth information is carried by a media access control control element MAC CE or a downlink control information DCI.

8. The method according to any one of claims 1 to 7, characterized in that, The terminal device includes a first module and a second module for receiving and transmitting information. At least one of the first module and the second module is different in terms of power consumption, hardware composition, and the waveform of the transmitted signal. The power consumption of the first module is less than that of the second module. The method further includes: Based on the configuration information of the first module for receiving the third signal; Perform cell selection and / or cell reselection based on the measurement result of the third signal.

9. A communication method, characterized in that, The method is applied to a terminal device. The terminal device includes a first module and a second module for receiving and transmitting information. At least one of the first module and the second module is different in terms of power consumption, hardware composition, and the waveform of the transmitted signal. The power consumption of the first module is less than that of the second module. The method includes: Receive a wake-up signal from the serving cell based on the first module; Obtain the measurement result of the fourth signal based on the second module; When the measurement result of the fourth signal is less than the fifth threshold, send a first signal to the serving cell. The first signal is used to trigger the serving cell to adjust the transmit power; When the measurement result of the fourth signal is greater than or equal to the fifth threshold, send or receive a signal based on the second module.

10. A communication method, characterized in that, The method is applied to a first network device. The first network device is the network device to which the target cell belongs. The method includes: Receive a first signal; Adjust the transmit power of the first network device according to the first signal.

11. The method according to claim 10, wherein The method further includes: Send fifth information to the serving cell. The fifth information is used to indicate the adjustment information of the transmit power of the target cell and / or the power margin information of the target cell.

12. The method according to claim 10 or 11, characterized in that, The first network device includes a first module and a second module for receiving and transmitting information. At least one of the first module and the second module is different in terms of power consumption, hardware composition, and the waveform of the transmitted signal. The power consumption of the first module is less than that of the second module. Receiving the first signal includes: Receive the first signal based on the first module; Adjusting the transmit power of the first network device according to the first signal includes: Adjust the transmit power of the second module according to the first signal.

13. The method according to any one of claims 10 to 12, characterized in that, The method further includes: Receive seventh information from the serving cell. The seventh information is used to request the target cell to adjust the transmit power.

14. A communication method, characterized in that, The method is applied to a second network device. The second network device is the network device to which the serving cell belongs. The method includes: Send eighth information to the terminal device. The eighth information is used to configure at least one of the following information: The first threshold corresponding to the difference between the sum of the measurement result of the target cell and the power margin of the target cell and the sum of the measurement result of the serving cell and the power margin of the serving cell; or, The second threshold corresponding to the sum of the measurement result of the serving cell and the power margin of the serving cell; or, The third threshold corresponding to the sum of the measurement result of the target cell and the power margin of the target cell; or, The fourth threshold corresponding to the measurement result of the target cell; or, The fifth threshold corresponding to the measurement result of the fourth signal; or, The configuration information of the first signal.

15. The method according to claim 14, wherein The method further includes: Send fifth information to the terminal device, where the fifth information is used to indicate adjustment information of the transmission power of the serving cell and / or the target cell, and / or the fifth information is used to indicate the power headroom information of the serving cell and / or the target cell.

16. The method according to claim 14 or 15, characterized in that, The method further includes: Send seventh information to the target cell, where the seventh information is used to request the target cell to adjust the transmission power.

17. A communication method, characterized in that The method is applied to a second network device, the second network device is the network device to which the serving cell belongs, the second network device includes a first module and a second module for sending 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 that of the second module, the second network device is the network device to which the serving cell belongs, and the method includes: Send a wake-up signal to the terminal device based on the first module; Receive a first signal from the terminal device; adjust the transmission power of the second network device according to the first signal; or, Send or receive signals based on the second module.

18. A communication device, characterized in that, Includes a module for performing the method according to any one of claims 1 to 17.

19. A communication device, characterized in that, Includes at least one processor, and 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 17.

20. The communication device according to claim 19, wherein The communication device is a chip or a chip system.

21. A readable storage medium, characterized in that, A computer program or instruction is stored in the storage medium, and when the computer program or instruction is executed by the communication device, the method according to any one of claims 1 to 17 is implemented.

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