Communication method and apparatus

Abstract

The present application provides a communication method and an apparatus. The method comprises: a terminal device transmitting a first uplink signal to a first network device; and the terminal device transmitting a second uplink signal to a second network device, wherein a beam used for transmitting the first uplink signal is a first beam, a beam used for transmitting the second uplink signal is a second beam, an identifier of the first beam is different from an identifier of the second beam, the first network device supports transmitting a downlink signal, and the second network device does not support transmitting a downlink signal. In the method, uplink transmission is carried out by using different beams for different network devices, thus improving the communication performance.

Description

Communication method and device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on December 29, 2023, with application number 202311867708.2 and application name "A Communication Method and Device", the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of communication technology, and in particular to a communication method and device. Background Art

[0004] The fifth-generation communication system, known as the New Radio (NR) system, supports signal transmission at higher frequencies using greater bandwidth. However, signal energy attenuation is significant at higher frequencies. Due to the limited transmit power of terminal devices, the maximum acceptable transmission distance of uplink signals sent at higher frequencies is shortened, resulting in poor uplink coverage and lower experienced data rates for terminal devices at the network edge.

[0005] To improve the uplink coverage performance of the network, a common solution is to deploy a transmission reception point (TRP) at the cell edge for uplink signal reception only (UL-only TRP). This reduces the energy attenuation from terminal devices to network devices and increases the uplink signal energy received by network devices, which is equivalent to improving the coverage capability of the physical random access channel (PRACH).

[0006] Currently, terminal devices transmit uplink signals based on a set of transmission parameters. In scenarios where UL-only TRPs are deployed, the base station receiving uplink signals (macro TRPs) and the UL-only TRPs are deployed in different locations. Using the same transmission parameters can lead to wasted power consumption or poor signal transmission performance in terminal devices. Therefore, configuring uplink transmission parameters for terminal devices has become a worthy research topic. Summary of the Invention

[0007] The present application provides a communication method and apparatus, which configures the terminal device side to adapt to the transmission beam and transmission parameters of different network devices, thereby improving the signal transmission performance.

[0008] In a first aspect, an embodiment of the present application provides a communication method, applied to a terminal device, including: sending a first uplink signal to a first network device; sending a second uplink signal to a second network device; wherein the beam used to send the first uplink signal is a first beam, and the beam used to send the second uplink signal is a second beam, and the identifier of the first beam and the identifier of the second beam are different; the first network device supports sending downlink signals, and the second network device does not support sending downlink signals.

[0009] In the above design, the first network device can be a macro TRP, and the second network device can be a UL-only TRP. The terminal device uses different beam identifiers to send uplink signals to the macro TRP and UL-only TRP, respectively. This increases the energy of the uplink signals received by the macro TRP and UL-only TRP, thereby improving signal transmission performance and uplink transmission rate.

[0010] In one possible design, the method also includes: the terminal device receives first indication information, and the first indication information is used to indicate the identifier of the first beam corresponding to the first network device and the identifier of the second beam corresponding to the second network device; or, the first indication information is used to indicate the identifier of the second beam corresponding to the second network device.

[0011] In one possible design, the method also includes: the terminal device receives second indication information, the second indication information is used to indicate a first signal set corresponding to the first network device and a second signal set corresponding to the second network device, the first signal set includes the first uplink signal, and the second signal set includes the second uplink signal.

[0012] In such a design, the signal sets sent by the terminal device are configured for the macro station TRP and UL-only TRP respectively, and different beam identifiers are configured for different signal sets, which can distinguish the signals sent to different network devices and reduce interference between signals. Optionally, when the terminal device sends an uplink signal, the signals in different signal sets can also be mapped to mutually orthogonal time-frequency resources, that is, the first time-frequency resource used to send the signal in the first signal set and the second time-frequency resource used to send the signal in the second signal set are mutually orthogonal time-frequency resources. Such a design can also ensure that the terminal device can send these uplink signals independently.

[0013] In one possible design, the method further includes: the terminal device receives third indication information, the third indication information is used to indicate a first transmission parameter corresponding to the first network device and a second transmission parameter corresponding to the second network device; the sending of a first uplink signal to the first network device includes: sending a first uplink signal to the first network device according to the first transmission parameter; the sending of a second uplink signal to the second network device includes: sending a second uplink signal to the second network device according to the second transmission parameter. In such a design, the transmission parameters used by the terminal device when sending the uplink signal are configured for the macro station TRP and the UL-only TRP respectively, which can achieve adaptation between the transmission parameters and different TRPs and improve the transmission performance of the uplink signal.

[0014] In one possible design, the first transmission parameter and the second transmission parameter are both path loss parameters. The first transmission parameter can also be replaced by the first path loss parameter, and the second transmission parameter can also be replaced by the second path loss parameter. In another possible design, the first transmission parameter and the second transmission parameter are both timing advance parameters. The first transmission parameter can also be replaced by the first timing advance (TA) parameter, and the second transmission parameter can also be replaced by the second timing advance parameter.

[0015] In one possible design, before the terminal device receives the third indication information, the method further includes: the terminal device sending at least one uplink reference signal, where the at least one uplink reference signal is used to determine the first transmission parameter and the second transmission parameter. For example, the terminal device sends a first uplink reference signal via the first beam, where the first uplink reference signal is used to determine the first transmission parameter; and the terminal device sends a second uplink reference signal via the second beam, where the second uplink reference signal is used to determine the second transmission parameter. Such a design can improve the adaptability between the transmission parameters and the transmit beam, thereby improving the transmission performance of the uplink signal.

[0016] In one possible design, the third indication information includes: the first transmission parameter and the second transmission parameter; or, the first transmission parameter and the difference between the first transmission parameter and the second transmission parameter; or, the second transmission parameter and the difference between the second transmission parameter and the first transmission parameter.

[0017] In one possible design, when the difference between the first transmission parameter and the second transmission parameter is less than or equal to a first threshold, the transmit power used to send the first uplink signal and the transmit power used to send the second uplink signal are the same; or, when the difference between the first transmission parameter and the second transmission parameter is greater than the first threshold, the transmit power used to send the first uplink signal and the transmit power used to send the second uplink signal are different. Such a design can reduce indication overhead on the network device side.

[0018] In a second aspect, an embodiment of the present application provides a communication method, applied to a first network device, including: sending first indication information, the first indication information being used to indicate an identifier of a first beam corresponding to the first network device and an identifier of a second beam corresponding to the second network device; wherein the first network device supports sending downlink signals, and the second network device does not support sending downlink signals; and receiving a first uplink signal sent by a terminal device through the first beam.

[0019] In one possible design, the method also includes: the first network device receives fourth indication information from the second network device, and the fourth indication information is used to indicate an identifier of the second beam corresponding to the second network device.

[0020] In one possible design, the method also includes: the first network device sends second indication information, and the second indication information is used to indicate a first signal set corresponding to the first network device and a second signal set corresponding to the second network device, the first signal set including the first uplink signal; the second signal set including the second uplink signal.

[0021] In one possible design, the first time-frequency resources used to receive signals in the first signal set and the second time-frequency resources used to receive signals in the second signal set are mutually orthogonal time-frequency resources.

[0022] In one possible design, the method also includes: the first network device sends a third indication information, wherein the third indication information is used to indicate a first transmission parameter corresponding to the first network device and a second transmission parameter corresponding to the second network device; and the first network device receives the first uplink signal sent by the terminal device based on the first transmission parameter.

[0023] In one possible design, before the first network device sends the third indication information, the method also includes: the first network device receives a first uplink reference signal sent by the terminal device through the first beam; and the first network device determines the first transmission parameter based on the first uplink reference signal.

[0024] In one possible design, the method also includes: the first network device receives fifth indication information, and the fifth indication information is used to indicate the second transmission parameter corresponding to the second network device.

[0025] In one possible design, the third indication information includes: the first transmission parameter and the second transmission parameter; or, the first transmission parameter and the difference between the first transmission parameter and the second transmission parameter; or, the second transmission parameter and the difference between the second transmission parameter and the first transmission parameter.

[0026] In a third aspect, an embodiment of the present application provides a communication method, applied to a second network device, including: sending fourth indication information to a first network device, the fourth indication information being used to indicate an identifier of a second beam corresponding to the second network device, so that the first network device indicates the identifier of the second beam to a terminal device; wherein the first network device supports sending downlink signals, and the second network device does not support sending downlink signals; and receiving a second uplink signal sent by the terminal device through the second beam.

[0027] In one possible design, the method also includes: the second network device sends fifth indication information to the first network device, the fifth indication information indicating the second transmission parameter corresponding to the second network device, so that the first network device sends third indication information to the terminal device, the third indication information is used to indicate the first transmission parameter corresponding to the first network device and the second transmission parameter corresponding to the second network device; the second network device receives the second uplink signal sent by the terminal device based on the second transmission parameter.

[0028] In one possible design, before the second network device sends the third indication information, it also includes: the second network device receives a second uplink reference signal sent by the terminal device through the second beam; and the second network device determines the second transmission parameter based on the second uplink reference signal.

[0029] In a fourth aspect, an embodiment of the present application provides a communication device, which may be a terminal device, or a device, module or chip in a terminal device, or a device that can be used in conjunction with a terminal device. In one design, the communication device may include a module that executes the method / operation / step / action described in the first aspect, and the module may be a hardware circuit, or software, or a combination of a hardware circuit and software. In one design, the communication device may include a processing module and a communication module. Optionally, the communication module includes a sending unit and a receiving unit, and the communication module may also be replaced by a transceiver unit, a communication interface, or a communication unit, and the processing module may also be replaced by a processing unit.

[0030] The communication module is used to perform the following operations under the control of the processing module:

[0031] Sending a first uplink signal to the first network device;

[0032] A second uplink signal is sent to a second network device; wherein, the beam used to send the first uplink signal is a first beam, the beam used to send the second uplink signal is a second beam, and the identifier of the first beam is different from the identifier of the second beam; the first network device supports sending downlink signals, and the second network device does not support sending downlink signals.

[0033] In one possible design, the communication module is also used to receive first indication information, where the first indication information is used to indicate the identifier of the first beam corresponding to the first network device and the identifier of the second beam corresponding to the second network device; or, the first indication information is used to indicate the identifier of the second beam corresponding to the second network device.

[0034] In one possible design, the communication module is further configured to receive second indication information, where the second indication information is configured to indicate a first signal set corresponding to the first network device and a second signal set corresponding to the second network device, where the first signal set includes the first uplink signal, and the second signal set includes the second uplink signal. Optionally, the first time-frequency resources used to transmit the signals in the first signal set and the second time-frequency resources used to transmit the signals in the second signal set are mutually orthogonal time-frequency resources.

[0035] In one possible design, the communication module is further used to receive third indication information, wherein the third indication information is used to indicate a first transmission parameter corresponding to the first network device and a second transmission parameter corresponding to the second network device; when the communication module sends a first uplink signal to the first network device, the communication module is specifically used to: send a first uplink signal to the first network device according to the first transmission parameter; when the communication module sends a second uplink signal to the second network device, the communication module is specifically used to: send a second uplink signal to the second network device according to the second transmission parameter.

[0036] In one possible design, the first transmission parameter and the second transmission parameter are both path loss parameters. The first transmission parameter can also be replaced by the first path loss parameter, and the second transmission parameter can also be replaced by the second path loss parameter. In another possible design, the first transmission parameter and the second transmission parameter are both timing advance parameters. The first transmission parameter can also be replaced by the first timing advance (TA) parameter, and the second transmission parameter can also be replaced by the second timing advance parameter.

[0037] In one possible design, the communication module is further configured to, before receiving the third indication information, send at least one uplink reference signal, where the at least one uplink reference signal is used to determine the first transmission parameter and the second transmission parameter. For example, when sending the at least one uplink reference signal, the communication module is specifically configured to: send a first uplink reference signal via the first beam, where the first uplink reference signal is used to determine the first transmission parameter; and send a second uplink reference signal via the second beam, where the second uplink reference signal is used to determine the second transmission parameter.

[0038] In one possible design, the third indication information includes: the first transmission parameter and the second transmission parameter; or, the first transmission parameter and the difference between the first transmission parameter and the second transmission parameter; or, the second transmission parameter and the difference between the second transmission parameter and the first transmission parameter.

[0039] In one possible design, when the difference between the first transmission parameter and the second transmission parameter is less than or equal to a first threshold, the transmission power used to send the first uplink signal and the transmission power used to send the second uplink signal are the same; or, when the difference between the first transmission parameter and the second transmission parameter is greater than the first threshold, the transmission power used to send the first uplink signal and the transmission power used to send the second uplink signal are different.

[0040] In a fifth aspect, an embodiment of the present application provides a communication device, which may be a first network device, or a device, module or chip in the first network device, or a device that can be used in combination with the first network device. In one design, the communication device may include a module that executes the method / operation / step / action described in the second aspect, and the module may be a hardware circuit, or software, or a combination of a hardware circuit and software. In one design, the communication device may include a processing module and a communication module. Optionally, the communication module includes a sending unit and a receiving unit, and the communication module may also be replaced by a transceiver unit, a communication interface, or a communication unit, etc. The processing module may also be replaced by a processing unit.

[0041] The communication module is used to perform the following operations under the control of the processing module:

[0042] Sending first indication information, where the first indication information is used to indicate an identifier of a first beam corresponding to a first network device and an identifier of a second beam corresponding to a second network device; wherein the first network device supports sending downlink signals, and the second network device does not support sending downlink signals;

[0043] The receiving terminal device sends a first uplink signal through the first beam.

[0044] In one possible design, the communication module is further used to receive fourth indication information from the second network device, and the fourth indication information is used to indicate the identifier of the second beam corresponding to the second network device.

[0045] In one possible design, the communication module is also used to send second indication information, wherein the second indication information is used to indicate a first signal set corresponding to the first network device and a second signal set corresponding to the second network device, the first signal set including the first uplink signal; the second signal set including the second uplink signal.

[0046] In one possible design, the first time-frequency resources used to receive signals in the first signal set and the second time-frequency resources used to receive signals in the second signal set are mutually orthogonal time-frequency resources.

[0047] In one possible design, the communication module is also used to: send third indication information, where the third indication information is used to indicate the first transmission parameter corresponding to the first network device and the second transmission parameter corresponding to the second network device; and receive the first uplink signal sent by the terminal device based on the first transmission parameter.

[0048] In one possible design, the communication module is further used to receive a first uplink reference signal sent by the terminal device through the first beam before sending the third indication information; the processing module is further used to determine the first transmission parameter based on the first uplink reference signal.

[0049] In one possible design, the communication module is further used to receive fifth indication information, where the fifth indication information is used to indicate the second transmission parameter corresponding to the second network device.

[0050] In one possible design, the third indication information includes: the first transmission parameter and the second transmission parameter; or, the first transmission parameter and the difference between the first transmission parameter and the second transmission parameter; or, the second transmission parameter and the difference between the second transmission parameter and the first transmission parameter.

[0051] In a sixth aspect, an embodiment of the present application provides a communication device, which may be a second network device, or a device, module or chip in the second network device, or a device that can be used in combination with the second network device. In one design, the communication device may include a module that executes the method / operation / step / action described in the third aspect, and the module may be a hardware circuit, or software, or a combination of a hardware circuit and software. In one design, the communication device may include a processing module and a communication module. Optionally, the communication module includes a sending unit and a receiving unit, and the communication module may also be replaced by a transceiver unit, a communication interface, or a communication unit, and the processing module may also be replaced by a processing unit.

[0052] The communication module is used to perform the following operations under the control of the processing module:

[0053] Sending fourth indication information to the first network device, where the fourth indication information is used to indicate an identifier of a second beam corresponding to the second network device, so that the first network device indicates the identifier of the second beam to the terminal device; wherein the first network device supports sending downlink signals, and the second network device does not support sending downlink signals;

[0054] The receiving terminal device sends a second uplink signal through the second beam.

[0055] In one possible design, the communication module is also used to send fifth indication information to the first network device, wherein the fifth indication information indicates the second transmission parameter corresponding to the second network device, so that the first network device sends third indication information to the terminal device, wherein the third indication information is used to indicate the first transmission parameter corresponding to the first network device and the second transmission parameter corresponding to the second network device; the communication module is also used to receive a second uplink signal sent by the terminal device based on the second transmission parameter.

[0056] In one possible design, the communication module is further configured to receive a second uplink reference signal sent by the terminal device through the second beam before sending the third indication information. The processing module is further configured to determine the second transmission parameter based on the second uplink reference signal.

[0057] In a seventh aspect, an embodiment of the present application provides a communication device, comprising a processor configured to implement the method described in the first aspect. The processor is coupled to a memory configured to store instructions and data. When the processor executes the instructions stored in the memory, the method described in the first aspect can be implemented. Optionally, the communication device may further comprise a memory; the communication device may further comprise a communication interface configured to enable the communication device to communicate with other devices. Exemplarily, the communication interface may be a transceiver, circuit, bus, module, pin, or other type of communication interface.

[0058] In an eighth aspect, an embodiment of the present application provides a communication device, comprising a processor configured to implement the method described in the second aspect. The processor is coupled to a memory configured to store instructions and data. When the processor executes the instructions stored in the memory, the method described in the second aspect can be implemented. Optionally, the communication device may further comprise a memory; the communication device may further comprise a communication interface configured to enable the communication device to communicate with other devices. Exemplarily, the communication interface may be a transceiver, circuit, bus, module, pin, or other type of communication interface.

[0059] In a ninth aspect, an embodiment of the present application provides a communication device, comprising a processor for implementing the method described in the second aspect above. The processor is coupled to a memory, which is used to store instructions and data. When the processor executes the instructions stored in the memory, the method described in the third aspect can be implemented. Optionally, the communication device may further include a memory; the communication device may further include a communication interface, which is used for the communication device to communicate with other devices. Exemplarily, the communication interface may be a transceiver, circuit, bus, module, pin, or other type of communication interface.

[0060] In the tenth aspect, an embodiment of the present application provides a communication system, including a communication device as described in the fourth aspect or the seventh aspect; a communication device as described in the fifth aspect or the eighth aspect; and a communication device as described in the sixth aspect or the ninth aspect.

[0061] In the eleventh aspect, an embodiment of the present application further provides a computer program, which, when executed on a computer, enables the computer to execute the method provided in any one of the first to third aspects above.

[0062] In the twelfth aspect, an embodiment of the present application further provides a computer program product, comprising instructions, which, when executed on a computer, enable the computer to execute the method provided in any one of the first to third aspects above.

[0063] In the thirteenth aspect, an embodiment of the present application further provides a computer-readable storage medium, in which a computer program or instruction is stored. When the computer program or instruction is run on a computer, the computer executes the method provided in any one of the first to third aspects above.

[0064] In the fourteenth aspect, an embodiment of the present application further provides a chip, which is used to read a computer program stored in a memory and execute the method provided in any one of the first to third aspects above, or the chip includes a circuit for executing the method provided in any one of the first to third aspects above.

[0065] In a fifteenth aspect, an embodiment of the present application further provides a chip system, which includes a processor for supporting a device to implement the method provided in any one of the first to third aspects above. In one possible design, the chip system also includes a memory for storing programs and data necessary for the device. The chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0066] For the effects of the solutions provided in any of the second to fifteenth aspects above, reference can be made to the corresponding description in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] FIG1 is a schematic diagram of the architecture of a communication system in an embodiment of the present application;

[0068] FIG2 is a flow chart of a communication method according to an embodiment of the present application;

[0069] FIG3 is a schematic diagram of one of the distribution of time-frequency positions in an embodiment of the present application;

[0070] FIG4 is a schematic diagram showing one of the distribution of time-frequency positions in an embodiment of the present application;

[0071] FIG5 is a flow chart of a communication method according to an embodiment of the present application;

[0072] FIG6 is a flow chart of a communication method according to an embodiment of the present application;

[0073] FIG7 is a flow chart of a communication method according to an embodiment of the present application;

[0074] FIG8 is a schematic diagram of a structure of a communication device according to an embodiment of the present application;

[0075] FIG9 is one of the structural diagrams of the communication device in the embodiment of the present application. DETAILED DESCRIPTION

[0076] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0077] The at least one (item) involved in the embodiments of the present application as follows indicates one (item) or more (items). More (items) refers to two (items) or more than two (items). "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. In addition, it should be understood that although the terms first, second, etc. may be used to describe each object in the embodiments of the present application, these objects should not be limited to these terms. These terms are only used to distinguish each object from each other.

[0078] The terms "including" and "having" and any variations thereof mentioned in the following description of the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes other steps or units that are not listed, or optionally includes other steps or units that are inherent to these processes, methods, products or devices. It should be noted that, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any method or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other methods or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way.

[0079] The technology provided in the embodiments of the present application can be applied to various communication systems. For example, the communication system can be a third generation (3G) communication system (such as evolved universal terrestrial radio access and NR dual connection (evolved universal terrestrial radio access, E-UTRA), universal mobile telecommunication system (UMTS)), fourth generation (4G) communication system (such as long term evolution (LTE) system), fifth generation (5G) communication system, world-wide interoperability for microwave access (WiMAX) or wireless local area network (WLAN) system, or a fusion system of multiple systems, or a future communication system, such as a sixth generation (6G) communication system. Among them, the 5G communication system can also be called a new radio (NR) system.

[0080] A network element in a communication system can send a signal to another network element or receive a signal from another network element. The signal may include information or data, etc. The network element may also be referred to as an entity, a network entity, a device, a communication device, a communication module, a node, a communication node, etc. The embodiments of the present application are described using a network element as an example. For example, a communication system may include at least one terminal device and at least one network device. The signal-sending network element may be a network device, and the signal-receiving network element may be a terminal device; or, the signal-sending network element may be a terminal device, and the signal-receiving network element may be a network device. In addition, it can be understood that if the communication system includes multiple terminal devices, multiple terminal devices can also send signals to each other, that is, the signal-sending network element and the signal-receiving network element may both be terminal devices.

[0081] The following is a detailed introduction to terminal devices and network devices.

[0082] (1) Terminal equipment

[0083] Terminal equipment, also known as terminal, user equipment (UE), mobile station (MS), or mobile terminal (MT), provides voice and / or data connectivity to users. Terminal equipment can communicate with one or more core network devices through network equipment. Terminal equipment includes handheld devices with wireless connectivity, other processing devices connected to a wireless modem, or in-vehicle devices. Terminal equipment can be portable, pocket-sized, handheld, built into a computer, or in-vehicle. Some examples of terminal devices include: personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), wireless network cameras, mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), wearable devices such as smart watches, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, terminals in vehicle networking systems, wireless terminals in self-driving cars, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities such as smart gas pumps, terminal devices on high-speed trains, and wireless terminals in smart homes such as smart speakers, smart coffee machines, and smart printers.

[0084] In the embodiments of the present application, the communication device for realizing the functions of the terminal device may be a terminal device, or a terminal device having some terminal functions, or a device capable of supporting the terminal device to realize the functions, such as a chip system, which may be installed in the terminal device. In the embodiments of the present application, the chip system may be composed of a chip, or may include a chip and other discrete devices. In the technical solutions provided in the embodiments of the present application, the communication device for realizing the functions of the terminal device is described as a terminal device or UE as an example.

[0085] In the embodiments of the present application, "sending information to... (terminal device)" can be understood as the destination end of the information being the terminal device, and can include directly or indirectly sending information to the terminal device. "Receiving information from... (terminal device)" can be understood as the source end of the information being the terminal device, and can include directly or indirectly receiving information from the terminal device. The information may be processed as necessary between the source end and the destination end of the information transmission, such as format changes, etc., but the destination end can understand the valid information from the source end. Similar expressions in this application can be understood similarly and will not be repeated here.

[0086] (2) Network equipment

[0087] A network device may be a base station (BS), which may also be referred to as an access network device, an access node (AN), or a radio access node (RAN). The network device may be connected to a core network (such as an LTE core network or a 5G core network) and may provide wireless access services to terminal devices. Examples of some network devices include, but are not limited to, at least one of the following: a next-generation node B (gNB) in 5G, a network device in an open radio access network (O-RAN), an evolved node B (eNB), a radio network controller (RNC), a node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., home evolved node B, or home node B, HNB), a transmitting and receiving point (TRP), a transmitting point (TP), and / or a mobile switching center, etc.; alternatively, the network device may be a relay station, an access point, an in-vehicle device, a wearable device, or a network device in a future evolved public land mobile network (PLMN), etc.

[0088] It is understood that TRPs are divided into uplink-only transmission reception points (UL-only TRPs) and macro TRPs. Among them, UL-only TRPs can receive uplink signals from terminal devices but cannot send downlink signals to terminal devices. Compared to UL-only TRPs, macro TRPs can receive uplink signals from terminal devices and send downlink signals to terminal devices.

[0089] Optionally, the network device (macro base station - TRP) in the embodiments of the present application may be an integrated base station, or may be a base station including a centralized unit (CU) and / or a distributed unit (DU). A base station including a CU and a DU may also be referred to as a base station with separate CU and DU, such as a base station including a gNB-CU and a gNB-DU. The CU may also be separated into a CU control plane (CU-CP) and a CU user plane (CU-UP), such as a base station including a gNB-CU-CP, a gNB-CU-UP, and a gNB-DU. Alternatively, the network device in the embodiments of the present application may also be an antenna unit (RU). Alternatively, the network device in the embodiments of the present application may also be an open radio access network (O-RAN) architecture, etc. The embodiments of the present application do not limit the specific deployment method of the network device. For example, when the network device is an O-RAN architecture, the network device shown in the embodiments of the present application may be an access network device in the O-RAN, such as a combination of one or more of a CU, DU, or RU, or a module in the access network device. In the ORAN system, CU can also be called open (open, O)-CU, CU-CP can also be called open (open, O)-CU-CP, CU-UP can also be called open (open, O)-CU-UP, and RU can also be called open (open, O)-RU.

[0090] In the embodiments of the present application, the communication device used to implement the network device function can be a network device, or a device that has some of the functions of a network device, or a device that can support the network device to implement the function. For example, a chip system can be installed in a network device. In the embodiments of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices. In the technical solutions provided in the embodiments of the present application, the communication device used to implement the network device function is a network device as an example for description.

[0091] In the embodiments of the present application, "sending information to ... (network device)" can be understood as the destination of the information being the network device, and can include directly or indirectly sending information to the network device. "Receiving information from ... (network device)" can be understood as the source of the information being the network device, and can include directly or indirectly receiving information from the network device. The information may undergo necessary processing between the source and destination of the information, such as format changes, but the destination can understand the valid information from the source. Similar expressions in this application can be understood similarly and will not be repeated here.

[0092] The implementation of this application mainly involves a technical solution in which a terminal device sends an uplink signal to a UL-only TRP and a macro station TRP, and can be applied to a communication system 100 as shown in Figure 1. As an example, the communication system 100 includes a first network device 110, a second network device 120, and a terminal device 130. Among them, the first network device 110 can send a downlink signal to the terminal device and can also receive an uplink signal from the terminal device, that is, the first network device 110 can also be understood as the aforementioned macro station TRP, and the second network device 120 can receive an uplink signal from the terminal device, but does not support sending a downlink signal, that is, the second network device 120 can also be understood as the aforementioned UL-only TRP.

[0093] In the embodiment of the present application, the downlink signal is carried on the downlink channel, and the uplink signal is carried on the uplink channel. As an example, the downlink channel includes a downlink data channel, a downlink control channel, and a broadcast channel. Among them, the downlink data channel can be a physical downlink shared channel (PDSCH), the downlink control channel can be a physical downlink control channel (PDCCH), and the broadcast channel can be a physical broadcast channel (PBCH). Correspondingly, the uplink channel includes an uplink data channel, an uplink control channel, a random access channel, and other channels. Among them, the uplink data channel can be a physical uplink shared channel (PUSCH), the uplink control channel can be a physical uplink control channel (PUCCH), and the physical random access channel (PRACH). It should be understood that the embodiment of the present application only describes the channel names with the above examples. In different systems and different scenarios, the data channel and the control channel may have different names, and the embodiment of the present application does not limit this.

[0094] It should be understood that the number and type of each device in the communication system shown in Figure 1 are for illustration only, and the embodiments of the present application are not limited to this. In actual applications, the communication system may also include more terminal devices, more network devices, and other network elements, for example, core network devices, and / or network management devices such as operation administration and maintenance (OAM) equipment.

[0095] The communication system and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person skilled in the art will appreciate that, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0096] Below, some terms used in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

[0097] 1) Path loss (abbreviated as path loss): refers to the energy attenuation of electromagnetic waves propagating in space, which is generally inversely proportional to the square or fourth power of the distance.

[0098] 2) Power control (abbreviated as power control): To ensure that the energy of the signal sent by the terminal device is basically the same when it reaches network devices at different distances from the terminal device, the network device needs to send signaling to the terminal to adjust the transmission power used by the terminal device to send signals to different network devices. This process is called power control.

[0099] 3) Reference signal (RS): Generally used for channel estimation, auxiliary signal demodulation, detection, etc. Some examples of reference signals are as follows: sounding reference signal (SRS), channel quality indicator reference signal (CQI-RS), demodulation reference signal (DMRS), channel state information reference signal (CSI-RS), demodulation reference signal (DMRS), and synchronization system / physical broadcast channel block (SS / PBCH block). Among them, SS / PBCH block can be simply called synchronization signal block (SSB). DMRS and CSI-RS can be used to obtain channel information.

[0100] 4) Timing Advance: When a terminal device sends an uplink signal to a network device in a communication network, in order to align the timing of the uplink signal with the downlink signal when it arrives at the network device, the terminal device needs to make a timing advance (TA) adjustment when sending the uplink signal.

[0101] In scenarios where UL-only TRP is deployed, the macro TRP and UL-only TRP are deployed in different locations. Generally speaking, the UL-only TRP is closer to the terminal device than the macro TRP, resulting in less path loss and transmission latency from the terminal device to the UL-only TRP. Terminal devices require appropriate power control when sending uplink signals. Currently, terminal devices use the same transmission parameters (e.g., transmit power, TA) to send an uplink signal without distinguishing whether the uplink signal is received by a UL-only TRP or a macro TRP. This design may result in insufficient transmit power for some uplink signals or excessive transmit power for some uplink signals, thereby reducing communication performance.

[0102] Based on this, an embodiment of the present application provides a communication method, which configures uplink transmission parameters for the macro station TRP and UL-only TRP respectively, such as the beam used to send uplink signals, transmission power, TA or other parameters, to improve the adaptability between the uplink transmission parameters and TRPs at different locations, thereby improving communication performance.

[0103] The centralized communication method provided in the embodiment of the present application is described in detail below using the first network device representing the macro station TRP and the second network device representing the UL-only TRP as an example.

[0104] 2 , a first communication method is shown in which a terminal device sends an uplink signal to a first network device and a second network device according to different transmission parameters.

[0105] S200, the terminal device sends an uplink reference signal; the first network device receives the uplink reference signal, and the second network device receives the uplink reference signal.

[0106] Specifically, the transmission power used by the terminal device to send the uplink reference signal may be configured by the first network device or may be predefined (or called preconfigured) by the protocol.

[0107] S201: A first network device measures an uplink reference signal to determine a first transmission parameter corresponding to the first network device.

[0108] In one possible implementation, the uplink reference signal is an SRS, and the first transmission parameter is a first path loss parameter. For example, the transmit power P0 (dB) of the SRS is known on the first network device side, and the SRS power received by the first network device is P1 (dB), then the first path loss parameter PL-1 = P1-P0 or PL = P0-P1 or PL = |P0-P1|; if P0 and P1 are expressed in decimal numbers, the first path loss parameter (PL) can also be determined by the following calculation method: PL = P1 / P0. Specifically, the first network device can configure the transmit power P0 of the SRS through downlink control information (DCI), or the terminal device uses a pre-configured default transmit power P0 to transmit the SRS.

[0109] In another possible implementation, the uplink reference signal is PRACH, and the first transmission parameter is a first TA parameter, denoted as TA1. For example, the first network device can measure the signal transmission delay T1 of the current terminal device by detecting the PRACH signal, and further calculate TA1=T1 / 2.

[0110] S202: The second network device measures an uplink reference signal to determine a second transmission parameter corresponding to the second network device.

[0111] In a possible implementation, the uplink reference signal is the SRS, and the second transmission parameter is the second path loss parameter. For example, the transmission power P0 (dB) of the SRS is known on the side of the second network device, and the SRS power received by the second network device is P1' (dB), then the second path loss parameter PL' = P1' - P0' or PL' = P0' - P1' or PL' = |P0' - P(1')|; if the powers P0' and P1' are represented in decimal numbers, the second path loss parameter (PL') can also be determined by the following calculation method: then PL' = P1' / P0'. Specifically, the first network device can configure the transmission power P0' of the SRS through DCI, or the terminal device transmits the SRS using a pre-configured default transmission power P0'.

[0112] In another possible implementation, the uplink reference signal is the PRACH, and the second transmission parameter is the second TA parameter, denoted as TA2. For example, by detecting the PRACH signal, the second network device can measure the signal transmission delay T2 of the current terminal device, and further calculate TA2 = T2 / 2. It can be understood that the values of the first transmission parameter and the second transmission parameter determined by the first network device in the above steps may be the same or different. For example, in a possible implementation, if the state of the communication link between the terminal device and the first network device is the same as the state of the communication link between the terminal device and the second network device, or in other words, the path losses of the two communication links are similar, then the values of the first transmission parameter and the second transmission parameter may be the same or close. For example, a difference threshold is preset and denoted as the first threshold. In this implementation, the value of the first transmission parameter and the value of the second transmission parameter are less than or equal to the first threshold. Taking the transmission parameter as the path loss parameter as an example, represented in dB, the first threshold th = 1 dB, the first path loss parameter is PL = 10 dB, and the second path loss parameter is PL' = 10.5 dB, then |PL - PL'| < th, which satisfies the constraint condition.

[0113] Another example, in another possible implementation, if the distance between the terminal device and the first network device is the same as or close to the distance between the terminal device and the second network device, then the values of the first transmission parameter and the second transmission parameter may be the same or close. For example, a difference threshold is preset and denoted as the first threshold. In this implementation, the value of the first transmission parameter and the value of the second transmission parameter are less than or equal to the first threshold. Taking the transmission parameter as the TA parameter as an example, the first threshold th = 1 ns, TA1 = 100 ns, TA2 = 100.5 ns, then |TA1 - TA2| < th satisfies the constraint condition.

[0114] Using the above method, the indication overhead of the transmission parameter can be reduced.

[0115] S203: The second network device sends fifth indication information to the first network device, where the fifth indication information is used to indicate a second transmission parameter corresponding to the second network device.

[0116] Specifically, the second network device may send the fifth indication information to the first network device through an X2 interface, an Xn-C interface, or an Xn-U interface.

[0117] S204: The first network device sends third indication information to the terminal device.

[0118] The third indication information is used to indicate a first transmission parameter corresponding to the first network device and a second transmission parameter corresponding to the second network device.

[0119] In a first possible implementation, the third indication information includes the first transmission parameter and the second transmission parameter. Accordingly, the terminal device can directly obtain the first transmission parameter and the second transmission parameter from the third indication information. For example, the transmission parameters are path loss parameters, where the first path loss parameter is PL = 20 dB and the second path loss parameter is PL' = 10 dB. For another example, the transmission parameters are TA parameters, where TA1 = 200 ns and TA2 = 100 ns.

[0120] In a second possible implementation, the third indication information includes the first transmission parameter and the difference between the first transmission parameter and the second transmission parameter; alternatively, the third indication information includes the second transmission parameter and the difference between the first transmission parameter and the second transmission parameter. Accordingly, the terminal device can determine the first transmission parameter and the second transmission parameter according to the third indication information. For example, if the transmission parameter is a path loss parameter, the first path loss parameter PL = 20 dB, and the difference between the first path loss parameter and the second path loss parameter Delta_PL = 5 dB, then the second path loss parameter PL' = 15 dB can be calculated. Another example, if the transmission parameter is a TA parameter, TA1 = 200 ns, and the difference between TA1 and TA2 Delta_TA = 50 ns, then TA2 = 150 ns can be calculated. In addition, in a third possible implementation, if the difference between the first transmission parameter and the second transmission parameter determined by the first network device is less than or equal to the first threshold, then the third indication information may only include the first transmission parameter or the second transmission parameter, or it can also be understood that the network device ignores the difference between the first transmission parameter and the second transmission parameter and regards the first transmission parameter and the second transmission parameter as the same parameter when indicating, so only one of the two transmission parameters is indicated. Accordingly, the terminal device determines the one transmission parameter included in the third indication information as the first transmission parameter and the second transmission parameter. For example, if the transmission parameter is a path loss parameter, the first threshold th = 1 dB, the first path loss parameter PL = 10 dB, and the second path loss parameter PL' = 10.5 dB, then |PL - PL'| < th, satisfying the constraint condition. At this time, the first network device only indicates 10 dB or 10.5 dB in the third indication information. Another example, if the transmission parameter is a TA parameter, the first threshold th = 1 ns, TA1 = 100 ns, and TA2 = 100.5 ns, then |TA1 - TA2| < th satisfies the constraint condition. At this time, the first network device only indicates 100 ns or 100.5 ns in the third indication information.

[0121] S205. The first network device sends second indication information to the terminal device.

[0122] Specifically, the second indication information is used to indicate the first signal set corresponding to the first network device and the second signal set corresponding to the second network device. Among them, the first signal set includes one or more signals that the terminal device can send to the first network device. The first signal set can also be alternatively described as the signal set of the macro station TRP; the second signal set includes one or more signals that the terminal device can send to the second network device. The second signal set can also be alternatively described as the signal set of the UL-only TRP. For the convenience of implementation, several examples of the signal set of the macro station TRP (the first signal set) and the signal set of the UL-only TRP (the second signal set) are introduced below.

[0123] Example 1: The signal set for a UL-only TRP is {PUSCH, PUCCH, SRS1}, and the signal set for a macro TRP is {PRACH, SRS2}. For an uplink signal, SRS1 is assigned to two different sets, SRS1 and SRS2, depending on whether the receiver is a macro TRP or a UL-only TRP. Optionally, SRS1 and SRS2 have different functions. For example, a UL-only TRP can determine uplink CSI based on SRS1, while a macro TRP can determine downlink CSI based on SRS2, leveraging channel reciprocity.

[0124] Example 2: UL-only TRP signal set: {PUSCH, SRS1}, macro TRP signal set: {PUCCH, PRACH, SRS2}. The description of SRS1 and SRS2 can be understood with reference to Example 1, and will not be repeated in this embodiment.

[0125] Example 3: Signal set for UL-only TRP: {PUSCH, PUCCH1, SRS1}, signal set for macro TRP: {PUCCH2, PRACH, SRS2}. For an uplink signal PUCCH, two different sets, PUCCH 1 and PUCCH 2, are assigned depending on whether the receiver is a macro TRP or a UL-only TRP. The description of SRS1 and SRS2 can be understood with reference to Example 1 and will not be further elaborated in this embodiment of the present application.

[0126] Example 4, the signal set of UL-only TRP: {PUSCH, PUCCH, CQI-RS}, the signal set of macro station TRP: {PRACH, SRS}.

[0127] Example 5: Signal set for UL-only TRP: {PUSCH, CQI-RS}, signal set for macro TRP: {PUCCH, PRACH, SRS}.

[0128] Example 6: Signal set of UL-only TRP: {PUSCH, PUCCH1, CQI-RS}, signal set of macro TRP: {PUCCH2, PRACH, SRS}.

[0129] In the above examples 3 to 6, a new reference signal different from SRS is introduced for uplink CSI measurement, such as CQI-RS, which refers to a reference signal dedicated to uplink CSI measurement; SRS1 and SRS2 or PUCCH1 and PUCCH2 can be used to distinguish two channels or signals with different power control parameters but similar functions.

[0130] In one possible implementation, the first time-frequency resources used to send the signals in the first signal set and the second time-frequency resources used to send the signals in the second signal set are mutually orthogonal time-frequency resources; or it can also be replaced by the description that: the time-frequency position of the signal mapping in the first signal set and the time-frequency position of the signal mapping in the second signal set are mutually orthogonal, which can be specifically time division orthogonal or frequency division orthogonal.

[0131] For example, Figure 3 shows that the signals in the first signal set and the second signal set are time-division orthogonal, and the time-frequency positions of the two uplink signal mappings are separated by one or more (orthogonal frequency division multiplexing, OFDM) symbols. As shown in Figure 4, the signals in the first signal set and the second signal set are frequency-division orthogonal; wherein, (a) in Figure 4 shows that the time-frequency positions of the signal mappings in the two signal sets are different but there is no gap; (b) in Figure 4 shows that the time-frequency positions of the signal mappings in the two signal sets are different and there is a gap. It can be understood that the frequency-division orthogonal method shown in Figure 4 (b) can also be called comb-division orthogonal.

[0132] Further optionally, the terminal device may respectively transmit signals in the signal set of the at least one network device based on the transmission parameters corresponding to the at least one network device. As an example, optional steps S206 and S207 are indicated by dashed lines in FIG2 , i.e., after executing S201 to S205 , the terminal device may execute S206 or S207 , or both S206 and S207 .

[0133] S206: The terminal device sends a first uplink signal to the first network device according to the first transmission parameter.

[0134] It can be understood that the first uplink signal is a signal in the first signal set described in S205.

[0135] In one possible implementation, corresponding to the case where the first transmission parameter described in S201 is a first path loss parameter, the terminal device can calculate the first transmit power used to send the first uplink signal to the first network device based on the first path loss parameter, and then send the first uplink signal to the first network device based on the first transmit power. Such a design, applied to CSI measurement scenarios, can improve the accuracy of CSI measurements of macro station TRP and UL-only TRP, improve uplink and downlink throughput, and reduce power waste when the terminal device sends uplink signals, thereby reducing the power consumption of the terminal device.

[0136] In another possible implementation, corresponding to the case where the first transmission parameter described in S201 is TA1, the terminal device can send the first uplink signal to the first network device in advance according to the TA1. Such a design is applied to the CSI measurement scenario. By adjusting the TA timing parameter, the accuracy of CSI measurement of the macro station TRP and UL-only TRP can be improved, and the uplink and downlink throughput rates can be increased.

[0137] S207. The terminal device sends a second uplink signal to the second network device according to the second transmission parameter.

[0138] In one possible implementation, corresponding to the case where the second transmission parameter described in S201 is the second path loss parameter, the terminal device can calculate the second transmission power used to send the second uplink signal to the second network device according to the second path loss parameter, and then send the second uplink signal to the second network device based on the second transmission power. Such a design is applied to the CSI measurement scenario, which can improve the accuracy of CSI measurement of the macro station TRP and UL-only TRP, increase the uplink and downlink throughput rates, and can also reduce the power waste when the terminal device sends the uplink signal and reduce the power consumption of the terminal device.

[0139] In another possible implementation, corresponding to the case where the second transmission parameter described in S201 is TA2, the terminal device can send the second uplink signal to the second network device in advance according to the TA2. Such a design is applied to the CSI measurement scenario. By adjusting the TA timing parameter, the accuracy of CSI measurement of the macro station TRP and UL-only TRP can be improved, and the uplink and downlink throughput rates can be increased.

[0140] In addition, for S206 and S207, in an optional design, if the difference between the first transmission parameter and the second transmission parameter is less than or equal to the first threshold, the terminal device can send the first uplink signal and the second uplink signal with the same transmission power, that is, the transmission power used to send the first uplink signal is the same as the transmission power used to send the second uplink signal. For example, the transmission parameter is the path loss parameter, expressed in dB, the first threshold is th = 1dB, the first path loss parameter is PL1 = 10dB, and the second path loss parameter is PL2 = 10.5dB. Then |PL1 - PL2| < th, which meets the constraint condition. At this time, if the transmission power of the first uplink signal is P1 and the transmission power of the second uplink signal is P2, P1 can be set equal to P2.

[0141] For example, in the case where the transmission parameter refers to the path loss parameter, if the difference between the first path loss parameter and the second loss parameter is less than or equal to the first threshold, the terminal device may transmit the first uplink signal and the second uplink signal with the same transmission power. Another example is that in the case where the transmission parameter refers to the Timing Advance (TA) parameter, if the difference between TA1 and TA2 is less than or equal to the first threshold, the terminal device may transmit the first uplink signal and the second uplink signal with the same transmission power TA parameter. For example, the first transmission parameter is the TA parameter, the first threshold is th = 1 ns, TA1 = 100 ns, and TA2 = 100.5 ns. Then, |TA1 - TA2| < th satisfies the constraint condition, and it can be set that the terminal device uses 100 ns or 100.5 ns as the timing advance for transmitting the first uplink signal and the second uplink signal.

[0142] It should be understood that the range of cases where the first transmission parameter and the second transmission parameter are less than or equal to the first threshold includes the case where the first transmission parameter and the second transmission parameter are the same.

[0143] In the above method, the uplink signals are divided into two signal sets corresponding to the macro station TRP and the UL-only TRP respectively, and the transmission parameters are configured respectively. At the same time, when the terminal device transmits signals, the signals in different signal sets are mapped to mutually orthogonal time-frequency resources, ensuring that the terminal device can transmit these signals independently.

[0144] Referring to the second communication method shown in FIG. 5, the terminal device transmits uplink signals to the first network device and the second network device through different beams. This method mainly includes the following steps.

[0145] S501, the terminal device determines the first beam corresponding to the first network device and the second beam corresponding to the second network device.

[0146] In a first possible implementation, the terminal device can implement beamforming using a weighted method among digital weights, analog weights, or digital-analog hybrid weights, thereby obtaining multiple transmit beams. In the embodiment of the present application, the transmit beam is referred to as a beam for short. Based on this, the terminal device can select different beams from multiple beams to establish a corresponding relationship with the aforementioned two network devices, such as selecting a first beam from multiple beams to correspond to the first network device, and selecting a second beam from multiple beams to correspond to the second network device. It can be understood that the identifier of the first beam and the identifier of the second beam are different. For example, the identifier of the first beam can be specifically represented by a beam ID (beam ID), such as the identifier of the first beam is beam ID 1, referred to as 1 for short. The identifier of the second beam can be specifically represented by a beam ID, such as the identifier of the second beam is beam ID 2, referred to as 2 for short. In this way, the energy of the uplink signal received by the macro station TRP and the UL-only TRP can be made higher, thereby improving the uplink transmission rate.

[0147] In a second possible implementation, the aforementioned first beam and second beam may be instructions from the first network device to the terminal device. For example, S501 may be divided into S501a and S501b; wherein, S501a: the first network device sends a first indication message to the terminal device, and the first indication message is used to indicate the identifier of the first beam corresponding to the first network device and the identifier of the second beam corresponding to the second network device; wherein, the identifier of the first beam and the identifier of the second beam are different; S501b: the terminal device determines the first beam and the second beam according to the first indication message. For example, the first network device may send a DCI to the terminal device, and the DCI indicates that the beam ID of the first beam is 3 and the beam ID of the second beam is 2. In this way, the macro station TRP can ensure that the transmission beam of the terminal device is accurate enough by indication, thereby improving the transmission rate of the uplink signal.

[0148] In a third possible implementation, the first network device only indicates the identifier of the second beam, and the identifier of the first beam is determined by the terminal device based on the receiving beam used to receive the downlink signal of the first network device. Based on this, the first network device sends a first indication message to the terminal device, and the first indication message only indicates the identifier of the second beam. Exemplarily, the identifier of the beam can be a beam ID, the first indication message is DCI, the ID of the second beam indicated in the DCI of the first network device is 4, and the receiving beam ID used by the terminal device when receiving the DCI is 2, then the ID of the first beam is also 2. In this way, the signaling indication overhead of the first network device (i.e., the macro station TRP) can be reduced.

[0149] In addition, it can be understood that, in the second possible implementation and the third possible implementation, the identifier of the second beam can be reported by the second network device to the first network device. Specifically, it can be understood as follows: the second network device sends fourth indication information to the first network device, and the fourth indication information is used to indicate the identifier of the second beam. For example, the fourth indication information includes the identifier of the second beam, or the fourth indication information is an indication information that can be used by the first network device to determine the identifier of the second beam. Optionally, the second network device (UL-only TRP) can send the fourth indication information to the first network device (macro station TRP) via the X2 interface, the Xn-C interface or the Xn-U interface.

[0150] S502, the terminal device sends a first uplink signal to the first network device through the first beam.

[0151] It can be understood that this step can also be replaced by describing: the terminal device sends a first uplink signal to the first network device, and the beam used to send the first uplink signal is the first beam.

[0152] S503, the terminal device sends a second uplink signal to the second network device through the second beam.

[0153] It can be understood that this step can also be replaced by describing: the terminal device sends a second uplink signal to the second network device, and the beam used to send the first uplink signal is the second beam.

[0154] It should be understood that the execution order of S502 and S503 can be simultaneous execution, or S502 can be executed first and then S503, or S503 can be executed first and then S502. The embodiment of the present application is not limited to this.

[0155] Furthermore, in one possible implementation, a first signal set and a second signal set may be predefined or indicated by the first network device; wherein the first signal set corresponds to the first network device and includes at least one signal that the terminal device can send to the first network device; and the second signal set corresponds to the second network device and includes a second signal set that the terminal device can send to the second network device. Based on this, the first uplink signal sent by the terminal device can be any signal in the first signal set, i.e., the first signal set includes the first uplink signal; and the second uplink signal sent by the terminal device can be any signal in the second signal set, i.e., the second signal set includes the second uplink signal.

[0156] Examples of the first signal set and the second signal set can be understood with reference to Examples 1 to 6 described in S205, and are not described in detail in this embodiment of the present application. The first time-frequency resource used to send the signals in the first signal set and the second time-frequency resource used to send the signals in the second signal set are mutually orthogonal time-frequency resources.

[0157] For example, the first signal set includes PUCCH and the second signal set includes PUSCH. The terminal uses time-frequency resource 1 to send PUCCH to the first device through beam 1, and uses time-frequency resource 2 to send PUSCH to the second device through beam 2. Time-frequency resource 1 and time-frequency resource 2 are orthogonal to each other.

[0158] For another example, the first signal set includes PUCCH1 and the second signal set includes PUCCH2. The terminal uses time-frequency resource 1 to send PUCCH1 to the first device through beam 1, and uses time-frequency resource 2 to send PUCCH2 to the second device through beam 2. Time-frequency resource 1 and time-frequency resource 2 are orthogonal to each other.

[0159] Referring to the third communication method illustrated in FIG6 , the terminal device sends an uplink signal to the first network device based on beamforming, but does not perform beamforming when sending an uplink signal to the second network device. The method mainly includes the following steps.

[0160] S601: The terminal device determines a first beam corresponding to a first network device.

[0161] In one possible implementation, the terminal device may implement beamforming using a weighted approach consisting of digital weights, analog weights, or a combination of digital and analog weights, thereby obtaining multiple transmit beams. In the embodiments of this application, the transmit beams are referred to as beams. Based on this, the terminal device may select a beam from the multiple beams for transmitting a first uplink signal to the first network device, referred to as a first beam. For example, the identifier of the first beam may be specifically represented by a beam ID (beam ID), such as beam ID 1, referred to as 1.

[0162] In another possible implementation, the aforementioned first beam may be an indication from the first network device to the terminal device. For example, S601 may be divided into S601a and S601b, wherein S601a: the first network device sends first indication information to the terminal device, and the first indication information is used to indicate the first beam corresponding to the first network device; S601b: the terminal device determines the first beam based on the first indication information. For example, the first network device may send a DCI to the terminal device, and the beam ID indicating the first beam in the DCI is 3. In this way, the macro station TRP can ensure that the transmission beam of the terminal device is sufficiently accurate through indication, thereby improving the transmission rate of the uplink signal.

[0163] S602, the terminal device sends a first uplink signal to the first network device through the first beam.

[0164] It can be understood that this step can also be replaced by describing: the terminal device sends a first uplink signal to the first network device, and the beam used to send the first uplink signal is the first beam.

[0165] S603: The terminal device sends a second uplink signal to the second network device.

[0166] It is understandable that the terminal device does not perform beamforming before sending the second uplink signal to the second network device, that is, the terminal device does not use a beam when sending the second uplink signal.

[0167] It should be understood that the execution order of S602 and S603 can be simultaneous execution, or S602 can be executed first and then S603, or S603 can be executed first and then S602, and the embodiments of the present application are not limited to this. For example, the first uplink signal is PUCCH, and the terminal device sends PUCCH to the first network device (macro station TRP), and the beam ID used when sending is 1; the second uplink signal is SRS, and the terminal device sends SRS to the second network device (UL-only TRP), and does not use any beam when sending, that is, no beamforming is performed. In this scenario, since the distance between the UL-only TRP and the terminal device is closer, beamforming is not required to ensure that the UL-only TRP receives the second uplink signal with high energy, which can reduce the interference of the terminal device to other terminal devices when sending the second uplink signal.

[0168] Furthermore, in one possible implementation, a first signal set and a second signal set may be predefined or indicated by the first network device; wherein the first signal set corresponds to the first network device and includes at least one signal that the terminal device can send to the first network device; and the second signal set corresponds to the second network device and includes a second signal set that the terminal device can send to the second network device. Based on this, the first uplink signal sent by the terminal device can be any signal in the first signal set, i.e., the first signal set includes the first uplink signal; and the second uplink signal sent by the terminal device can be any signal in the second signal set, i.e., the second signal set includes the second uplink signal.

[0169] Examples of the first signal set and the second signal set can be understood with reference to Examples 1 to 6 described in S205, and are not described in detail in this embodiment of the present application. The first time-frequency resource used to send the signals in the first signal set and the second time-frequency resource used to send the signals in the second signal set are mutually orthogonal time-frequency resources.

[0170] For example, the first signal set includes PUCCH and the second signal set includes PUSCH. The terminal uses time-frequency resource 1 to send PUCCH to the first device through beam 1, and uses time-frequency resource 2 to send PUSCH to the second device through beam 2. Time-frequency resource 1 and time-frequency resource 2 are orthogonal to each other.

[0171] For another example, the first signal set includes PUCCH1 and the second signal set includes PUCCH2. The terminal uses time-frequency resource 1 to send PUCCH1 to the first device through beam 1, and uses time-frequency resource 2 to send PUCCH2 to the second device through beam 2. Time-frequency resource 1 and time-frequency resource 2 are orthogonal to each other.

[0172] FIG7 illustrates a fourth communication method in which a terminal device sends an uplink signal to a first network device and a second network device using different beams and different transmission parameters. The method mainly includes the following steps.

[0173] S701, a first network device sends first indication information, and a terminal device receives the first indication information.

[0174] In one possible design, the first indication information is used to indicate the identifier of the first beam corresponding to the first network device and the identifier of the second beam corresponding to the second network device. Specifically, this step can be implemented with reference to the second possible implementation method in S501, and this embodiment of the present application will not be described in detail.

[0175] In another possible design, the first indication information is only used to indicate the identifier of the second beam corresponding to the second network device. Specifically, this step can be implemented with reference to the third possible implementation method in S501, and this embodiment of the present application will not be described in detail.

[0176] Alternatively, if the terminal device can independently obtain multiple beams based on beamforming, it can select the first beam and the second beam from the multiple beams, eliminating the need for step S701. Therefore, step S701 can be considered an optional step, which may or may not be performed. S701 is indicated by a dashed line in FIG7 .

[0177] S702, the first network device sends third indication information, and the terminal device receives the third indication information.

[0178] Among them, the third indication information is used to indicate the first transmission parameter corresponding to the first network device and the second transmission parameter corresponding to the second network device. Specifically, the step S702 can be implemented with reference to S204, and the embodiments of the present application will not be described in detail. Optionally, the first transmission parameter can be determined by the first network device based on the first uplink reference signal sent by the terminal device through the first beam; the second transmission parameter can be determined by the second network device based on the second uplink reference signal sent by the terminal device through the second beam, and the second network device indicates the second transmission parameter to the first network device after determining the second transmission parameter.

[0179] Taking the uplink reference signal as SRS as an example, the SRS sent by the terminal device to the first network device (macro station TRP) is SRS1, and the SRS sent by the terminal device to the second network device (UL-only TRP) is SRS2. The beam used by the terminal device to send SRS1 is the same as the beam used to send the first uplink signal to the first network device, and the beam used by the terminal device to send SRS2 is the same as the beam used to send the second uplink signal to the second network device; if beamforming is not performed when sending the first uplink signal or the second uplink signal, beamforming is not performed when sending SRS1 or SRS2. For example, the first uplink signal is PUCCH, and the beam ID used is 1, and the second uplink signal is PUSCH, and the beam ID used is 2, then the beam ID used to send SRS1 is 1, and the beam ID used to send SRS2 is 2.

[0180] S703: The terminal device sends a first uplink signal to the first network device through the first beam according to the first transmission parameter.

[0181] This step can be implemented with reference to S206 and S502, and will not be described in detail in this embodiment of the present application.

[0182] S704: The terminal device sends a second uplink signal to the second network device through the second beam according to the second transmission parameters.

[0183] This step can be implemented with reference to S207 and S503, and will not be described in detail in this embodiment of the present application.

[0184] It should be understood that the execution order of S703 and S704 can be simultaneous execution, or S703 can be executed first and then S704, or S703 can be executed first and then S704, and the embodiments of the present application are not limited to this. In addition, the first signal set and the second signal set can be pre-defined or indicated by the first network device; wherein the first signal set corresponds to the first network device, and the first signal set includes at least one signal that the terminal device can send to the first network device; the second signal set corresponds to the second network device, and the first signal set includes the second signal set that the terminal device can send to the second network device. Based on this, the first uplink signal sent by the terminal device can be any one of the signals in the first signal set, that is, the first signal set includes the first uplink signal; the second uplink signal sent by the terminal device can be any one of the signals in the second set, that is, the second signal set includes the second uplink signal.

[0185] Examples of the first signal set and the second signal set can be understood with reference to Examples 1 to 6 described in S205, and are not described in detail in this embodiment of the present application. The first time-frequency resource used to send the signals in the first signal set and the second time-frequency resource used to send the signals in the second signal set are mutually orthogonal time-frequency resources.

[0186] For example, the first signal set includes PUCCH and the second signal set includes PUSCH. The terminal uses time-frequency resource 1 to send PUCCH to the first device through beam 1, and uses time-frequency resource 2 to send PUSCH to the second device through beam 2. Time-frequency resource 1 and time-frequency resource 2 are orthogonal to each other.

[0187] For another example, the first signal set includes PUCCH1 and the second signal set includes PUCCH2. The terminal uses time-frequency resource 1 to send PUCCH1 to the first device through beam 1, and uses time-frequency resource 2 to send PUCCH2 to the second device through beam 2. Time-frequency resource 1 and time-frequency resource 2 are orthogonal to each other.

[0188] Based on the same concept, referring to FIG8 , an embodiment of the present application provides a communication device 800, which includes a processing module 801 and a communication module 802. The communication device 800 can be a terminal device, or a communication device applied to or used in conjunction with a terminal device, capable of implementing a communication method executed on the terminal device side; or the communication device 800 can be a network device, or a communication device applied to or used in conjunction with a network device, capable of implementing a communication method executed on the network device side.

[0189] The communication module may also be referred to as a transceiver module, transceiver, transceiver, or transceiver device. The processing module may also be referred to as a processor, processing board, processing unit, or processing device. Optionally, the communication module is used to perform the sending and receiving operations on the terminal device side or the network device side in the above method. The device in the communication module that implements the receiving function can be considered a receiving unit, and the device in the communication module that implements the sending function can be considered a sending unit. That is, the communication module includes a receiving unit and a sending unit.

[0190] When the communication device 800 is applied to a terminal device, the processing module 801 can be used to implement the processing functions of the terminal device in the embodiments shown in Figures 2, 5, 6, and 7, and the communication module 802 can be used to implement the transceiver functions of the terminal device in the embodiments shown in Figures 2, 5, 6, and 7. Alternatively, the communication device can also be understood with reference to the third aspect and possible designs of the third aspect in the Summary of the Invention.

[0191] When the communication device 800 is applied to a network device, the processing module 801 can be used to implement the processing functions of the network device in the embodiments shown in Figures 2, 5, 6, and 7, and the communication module 802 can be used to implement the transceiver functions of the network device in the embodiments shown in Figures 2, 5, 6, and 7. Alternatively, the communication device can also be understood with reference to the fourth aspect and possible designs of the fourth aspect in the Summary of the Invention.

[0192] In addition, it should be noted that the aforementioned communication module and / or processing module can be implemented through virtual modules, for example, the processing module can be implemented through a software functional unit or a virtual device, and the communication module can be implemented through a software function or a virtual device. Alternatively, the processing module or the communication module can also be implemented through a physical device. For example, if the communication device is implemented using a chip / chip circuit, the communication module can be an input / output circuit and / or a communication interface that performs input operations (corresponding to the aforementioned receiving operations) and output operations (corresponding to the aforementioned sending operations); the processing module is an integrated processor, microprocessor, or integrated circuit.

[0193] The division of modules in the embodiments of the present application is illustrative and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional modules in the various embodiments of the present application may be integrated into a single processor, or may exist physically separately, or two or more modules may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or software functional modules.

[0194] Based on the same technical concept, the embodiment of the present application further provides a communication device 900. For example, the communication device 900 can be a chip or a chip system. Optionally, in the embodiment of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0195] The communication device 900 can be used to implement the functions of any network element in the communication system described in the aforementioned embodiments. The communication device 900 may include at least one processor 910, which is coupled to a memory. Optionally, the memory may be located within the communication device, the memory may be integrated with the processor, or the memory may be located outside the communication device. For example, the communication device 900 may also include at least one memory 920. The memory 920 stores the necessary computer programs, computer programs or instructions and / or data for implementing any of the aforementioned embodiments; the processor 910 may execute the computer program stored in the memory 920 to complete the method in any of the aforementioned embodiments.

[0196] The communication device 900 may also include a communication interface 930, and the communication device 900 can exchange information with other devices through the communication interface 930. Exemplarily, the communication interface 930 can be a transceiver, a circuit, a bus, a module, a pin, or other types of communication interfaces. When the communication device 900 is a chip-type device or circuit, the communication interface 930 in the communication device 900 can also be an input-output circuit that can input information (or receive information) and output information (or send information). The processor is an integrated processor or microprocessor or integrated circuit or logic circuit, and the processor can determine output information based on the input information.

[0197] The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, which can be electrical, mechanical, or other forms, and is used for information exchange between devices, units, or modules. The processor 910 may operate in conjunction with the memory 920 and the communication interface 930. The specific connection medium between the processor 910, memory 920, and communication interface 930 is not limited in the embodiments of the present application.

[0198] Optionally, referring to FIG9 , the processor 910, the memory 920, and the communication interface 930 are interconnected via a bus 940. The bus 940 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus may be classified as an address bus, a data bus, a control bus, etc. For ease of illustration, FIG9 shows only one thick line, but this does not mean that there is only one bus or only one type of bus.

[0199] In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present application may be directly implemented as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0200] In an embodiment of the present application, the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), such as a random-access memory (RAM). The memory is any other medium that can be used to carry or store a desired program code in the form of an instruction or data structure and can be accessed by a computer, but is not limited thereto. The memory in the embodiment of the present application may also be a circuit or any other device that can implement a storage function, for storing program instructions and / or data.

[0201] In one possible implementation, the communication device 900 can be applied to a first network device. Specifically, the communication device 900 can be a first network device, or a device that can support the first network device and implement the functions of the first network device in any of the above-mentioned embodiments. The memory 920 stores a computer program (or instruction) and / or data that implements the functions of the first network device in any of the above-mentioned embodiments. The processor 910 can execute the computer program stored in the memory 920 to complete the method performed by the first network device in any of the above-mentioned embodiments. Applied to the first network device, the communication interface in the communication device 900 can be used to interact with the terminal device, send information to the terminal device, or receive information from the terminal device.

[0202] In one possible implementation, the communication device 900 can be applied to a second network device. Specifically, the communication device 900 can be a second network device, or a device that can support the second network device and implement the functions of the second network device in any of the above-mentioned embodiments. The memory 920 stores a computer program (or instruction) and / or data that implements the functions of the second network device in any of the above-mentioned embodiments. The processor 910 can execute the computer program stored in the memory 920 to complete the method performed by the second network device in any of the above-mentioned embodiments. Applied to the second network device, the communication interface in the communication device 900 can be used to receive information from a terminal device.

[0203] In one possible implementation, the communication device 900 can be applied to a terminal device. Specifically, the communication device 900 can be a terminal device, or a device that can support the terminal device and implement the functions of the terminal device in any of the above-mentioned embodiments. The memory 920 stores a computer program (or instruction) and / or data that implements the functions of the terminal device in any of the above-mentioned embodiments. The processor 910 can execute the computer program stored in the memory 920 to complete the method executed by the terminal device in any of the above-mentioned embodiments. Applied to a terminal device, the communication interface in the communication device 900 can be used to interact with a network device, send information to the network device, or receive information from the network device.

[0204] Since the communication device 900 provided in this embodiment can be applied to a first network device to implement the method performed by the first network device, or applied to a first network device to implement the method performed by the first network device, or applied to a terminal device to implement the method performed by the terminal device, the technical effects that can be achieved can be referred to the above method examples and will not be repeated here.

[0205] Based on the above embodiments, an embodiment of the present application provides a communication system, including a network device and a terminal device, wherein the network device and the terminal device can implement the methods provided in the embodiments shown in Figures 2, 5, 6 and 7.

[0206] The technical solutions provided in the embodiments of the present application can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, they can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a terminal device, a network device, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium.

[0207] In the embodiments of the present application, under the premise that there is no logical contradiction, the embodiments may reference each other, for example, the methods and / or terms between method embodiments may reference each other, for example, the functions and / or terms between device embodiments may reference each other, for example, the functions and / or terms between device embodiments and method embodiments may reference each other.

[0208] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present application without departing from the scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the embodiments of the present application and their equivalents, the embodiments of the present application are intended to include these modifications and variations.

Claims

1. A communication method, characterized in that, Applied to a terminal device, including: Sending a first uplink signal to a first network device; sending a second uplink signal to a second network device; Wherein, the beam for sending the first uplink signal is a first beam, and the beam for sending the second uplink signal is a second beam, and the identifier of the first beam is different from the identifier of the second beam; the first network device supports sending downlink signals, and the second network device does not support sending downlink signals.

2. The method according to claim 1, wherein It further includes: Receiving first indication information, where the first indication information is used to indicate the identifier of the first beam corresponding to the first network device and the identifier of the second beam corresponding to the second network device; or, the first indication information is used to indicate the identifier of the second beam corresponding to the second network device.

3. The method according to claim 1 or 2, characterized in that It further includes: Receiving second indication information, where the second indication information is used to indicate a first signal set corresponding to the first network device and a second signal set corresponding to the second network device, the first signal set includes the first uplink signal, and the second signal set includes the second uplink signal.

4. The method according to claim 3, characterized in that The first time-frequency resource for sending the signals in the first signal set and the second time-frequency resource for sending the signals in the second signal set are orthogonal time-frequency resources.

5. The method according to any one of claims 1 to 4, characterized in that It further includes: Receiving third indication information, where the third indication information is used to indicate a first transmission parameter corresponding to the first network device and a second transmission parameter corresponding to the second network device; The step of sending the first uplink signal to the first network device includes: sending the first uplink signal to the first network device according to the first transmission parameter; The step of sending the second uplink signal to the second network device includes: sending the second uplink signal to the second network device according to the second transmission parameter.

6. The method according to claim 5, wherein Before receiving the third indication information, it further includes: Sending a first uplink reference signal through the first beam, where the first uplink reference signal is used to determine the first transmission parameter; Sending a second uplink reference signal through the second beam, where the second uplink reference signal is used to determine the second transmission parameter.

7. The method according to claim 5 or 6, characterized in that, The third indication information includes: The first transmission parameter and the second transmission parameter; or, The first transmission parameter and the difference between the first transmission parameter and the second transmission parameter; or, The second transmission parameter and the difference between the second transmission parameter and the first transmission parameter.

8. The method according to any one of claims 5 to 7, characterized in that, When the difference between the first transmission parameter and the second transmission parameter is less than or equal to a first threshold, the transmission power for sending the first uplink signal is the same as the transmission power for sending the second uplink signal; or, When the difference between the first transmission parameter and the second transmission parameter is greater than the first threshold, the transmission power for sending the first uplink signal is different from the transmission power for sending the second uplink signal.

9. A communication method, characterized in that, Applied to a first network device, including: Send first indication information, where the first indication information is used to indicate the identifier of a first beam corresponding to the first network device and the identifier of a second beam corresponding to the second network device; wherein, the first network device supports sending downlink signals, and the second network device does not support sending downlink signals; Receive a first uplink signal sent by the terminal device through the first beam.

10. The method according to claim 9, characterized in that, Further includes: Receive fourth indication information from the second network device, where the fourth indication information is used to indicate the identifier of the second beam corresponding to the second network device.

11. The method according to claim 9 or 10, characterized in that, Further includes: Send second indication information, where the second indication information is used to indicate a first signal set corresponding to the first network device and a second signal set corresponding to the second network device, the first signal set includes the first uplink signal; the second signal set includes the second uplink signal.

12. The method according to claim 11, wherein, The first time-frequency resource for receiving signals in the first signal set and the second time-frequency resource for receiving signals in the second signal set are orthogonal time-frequency resources.

13. The method according to any one of claims 9 to 12, characterized in that, Further includes: Send third indication information, where the third indication information is used to indicate a first transmission parameter corresponding to the first network device and a second transmission parameter corresponding to the second network device; Receive the first uplink signal sent by the terminal device based on the first transmission parameter.

14. The method according to claim 13, characterized in that, Before sending the third indication information, further includes: Receive a first uplink reference signal sent by the terminal device through the first beam; Determine the first transmission parameter according to the first uplink reference signal.

15. The method according to claim 13 or 14, characterized in that, Further includes: Receive fifth indication information, where the fifth indication information is used to indicate the second transmission parameter corresponding to the second network device.

16. The method according to any one of claims 13-15, characterized in that, The third indication information includes: The first transmission parameter and the second transmission parameter; or, The first transmission parameter and the difference between the first transmission parameter and the second transmission parameter; or, The second transmission parameter and the difference between the second transmission parameter and the first transmission parameter.

17. A communication method, characterized in that, Applied to the second network device, includes: Send fourth indication information to the first network device, where the fourth indication information is used to indicate the identifier of the second beam corresponding to the second network device, so that the first network device indicates the identifier of the second beam to the terminal device; wherein, the first network device supports sending downlink signals, and the second network device does not support sending downlink signals; Receive a second uplink signal sent by the terminal device through the second beam.

18. The method according to claim 17, wherein Further includes: Send fifth indication information to the first network device, where the fifth indication information indicates the second transmission parameter corresponding to the second network device, so that the first network device sends third indication information to the terminal device, and the third indication information is used to indicate the first transmission parameter corresponding to the first network device and the second transmission parameter corresponding to the second network device; Receive the second uplink signal sent by the terminal device based on the second transmission parameter.

19. The method according to claim 17 or 18, characterized in that Before sending the third indication information, further includes: Receive a second uplink reference signal sent by the terminal device through the second beam; Determine the second transmission parameter according to the second uplink reference signal.

20. A communication device, characterized in that, Comprising a module for performing the method according to any one of claims 1-8.

21. A communication device, characterized in that, Comprising a module for performing the method according to any one of claims 9-16.

22. A communication device, characterized in that, Comprising a module for performing the method according to any one of claims 17-19.

23. A communication device, characterized in that, Comprising: A processor for executing a computer program or instruction in a memory to implement the method according to any one of claims 1-19.

24. A computer-readable storage medium, characterized in that, Instructions are stored on the computer-readable storage medium, and when the instructions are run on a computer, the computer is caused to execute the method according to any one of claims 1-19.

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