Signal transmission method and apparatus

Abstract

The present application provides a signal transmission method and device. In the method, a terminal uses a first analog filter to filter a received first signal or a first signal to be transmitted. The center frequency and / or passband bandwidth of the first analog filter is determined based on M subbands. The M subbands include a first subband and a second subband, where the first subband is configured for uplink transmission on a first time domain resource, and the second subband is configured for downlink transmission on the first time domain resource. Based on the above solution, the same design solution is used for the downlink analog filter and the uplink analog filter, so that the design of the filter may be simplified and the implementation complexity of the terminal may be reduced. When the center frequency of the uplink analog filter is the same as the center frequency of the downlink analog filter, the switching delay of the terminal from signal transmission to signal reception or from signal reception to signal transmission may be reduced.

Description

Technical Field

[0001] This application relates to the field of wireless communication technologies, and particularly to signal transmission methods and apparatuses.

Background Art

[0002] Cross-reference to Related Applications This application claims priority to Chinese Patent Application No. 202110998362.4, titled "SIGNAL TRANSMISSION METHOD AND APPARATUS", filed with the China National Intellectual Property Administration on August 27, 2021, which is hereby incorporated by reference in its entirety.

[0003] In a new radio (NR) system, in order to improve system capabilities and reduce transmission delays, a dynamic uplink / downlink switching technology called new dual technology has been proposed. At a specific moment, the base station may receive signals in a first sub-band and simultaneously transmit signals in a second sub-band. However, although the terminal may receive signals in the second sub-band or transmit signals in the first sub-band, it will not receive signals in the second sub-band and simultaneously transmit signals in the first sub-band.

[0004] After the new dual technology is introduced, how to filter the signals received by the terminal and the signals to be transmitted becomes an issue to be solved.

Summary of the Invention

[0005] This application provides a signal transmission method and apparatus to reduce the data transmission delay of a terminal.

[0006] According to a first aspect, a signal transmission method is provided. This method may be executed by a terminal or may be executed by a chip applied to a terminal device. In this method, the terminal receives first indication information from a network device, and the first indication information indicates to the terminal to receive a first signal or transmit a first signal on a first time-frequency resource. The terminal receives the first signal and filters the first signal using a first analog filter, or the terminal filters the first signal using the first analog filter and transmits the first signal. The center frequency and / or passband bandwidth of the first analog filter is determined based on M sub-bands, where M is an integer greater than 1. The M sub-bands include a first sub-band and a second sub-band. The first sub-band is set for uplink transmission on a first time-domain resource. The second sub-band is set for downlink transmission on the first time-domain resource. The first time-domain resource overlaps with the time-domain resource of the first time-frequency resource.

[0007] Based on the above solution, when the terminal receives a signal and when the terminal transmits a signal, the same design solution is used for the downlink analog filter and the uplink analog filter, so the filter design is simplified and the complexity of the terminal can be reduced.

[0008] In a possible implementation, the bandwidth of the M sub-bands is included in the frequency-domain range of one bandwidth part (BWP). Alternatively, the bandwidth of the M sub-bands is included in the frequency-domain range of one carrier.

[0009] In a possible implementation, the first indication information indicates to the terminal to receive the first signal on the first time-frequency resource. The terminal receives the second indication information from the network device, and the second indication information indicates to the terminal to transmit the second signal on the second time-frequency resource. The time-domain resource of the second time-frequency resource overlaps with the first time-domain resource, and the time-domain resource of the second time-frequency resource does not overlap with the time-domain resource of the first time-frequency resource. The terminal filters the second signal using the second analog filter. The center frequency of the first analog filter is the same as the center frequency of the second analog filter.

[0010] Based on the above solution, when the terminal receives a signal and when the terminal transmits a signal, the center frequency of the downlink analog filter is the same as the center frequency of the uplink analog filter. Thereby, the switching time between uplink transmission and downlink transmission can be shortened. Further, existing analog filters can also be reused to reduce the complexity of the terminal.

[0011] In a possible implementation, the passband bandwidth of the first analog filter is the same as the passband bandwidth of the second analog filter. Alternatively, the center frequency and passband bandwidth of the first analog filter are determined based on M sub-bands, the center frequency of the second analog filter is determined based on M sub-bands, and the passband bandwidth of the second analog filter is determined based on K of the M sub-bands and the center frequency of the second analog filter. The K sub-bands are set for uplink transmission on the first time domain resource. Alternatively, the passband bandwidth and center frequency of the second analog filter are determined based on M sub-bands, and the passband bandwidth of the first analog filter is determined based on P of the M sub-bands and the center frequency of the first analog filter. The P sub-bands are set for downlink transmission on the first time domain resource. Alternatively, the center frequency and passband bandwidth of the second analog filter are determined based on K of the M sub-bands, and the K sub-bands are set for uplink transmission on the first time domain resource. The center frequency of the first analog filter is determined based on the K sub-bands, and the passband bandwidth of the first analog filter is determined based on the M sub-bands and the center frequency of the first analog filter. Alternatively, the center frequency and passband bandwidth of the first analog filter are determined based on P of the M sub-bands, and the P sub-bands are set for downlink transmission on the first time domain resource. The center frequency of the second analog filter is determined based on the P sub-bands, and the passband bandwidth of the second analog filter is determined based on the M sub-bands and the center frequency of the second analog filter.Alternatively, the center frequency and the passband bandwidth of the second analog filter are determined based on K out of M sub-bands, where the K sub-bands are configured for uplink transmission on the first time domain resource, the center frequency of the first analog filter is determined based on the K sub-bands, the passband bandwidth of the first analog filter is determined based on P sub-bands and the center frequency of the first analog filter, and the P sub-bands are configured for downlink transmission on the first time domain resource. Alternatively, the center frequency and the passband bandwidth of the first analog filter are determined based on P out of M sub-bands, where the P sub-bands are configured for downlink transmission on the first time domain resource, the center frequency of the second analog filter is determined based on the P sub-bands, the passband bandwidth of the second analog filter is determined based on K sub-bands and the center frequency of the second analog filter, and the K sub-bands are configured for uplink transmission on the first time domain resource.

[0012] Based on the above solution, since the center frequency of the first analog filter is the same as that of the second analog filter, the terminal has a short switching time between signal reception and signal transmission, and a short switching time between signal transmission and signal reception. Further, the existing analog filter can be reused. Thereby, the complexity of the terminal can be reduced and the cost of the terminal can be reduced. When the passband bandwidth of the first analog filter is different from that of the second analog filter, for example, when the passband bandwidth of the first analog filter includes the frequency domain resources occupied by the sub-bands configured for uplink transmission, the passband bandwidth of the first analog filter or the passband bandwidth of the second analog filter includes only the frequency domain resources occupied by the same-direction transmission sub-bands, so that the interference in the opposite direction can be partially reduced and the transmission performance can be improved.

[0013] In a possible implementation, the terminal receives third indication information from the network device, and the third indication information indicates to the terminal to receive a third signal or transmit a third signal on a third time-frequency resource. The terminal receives the third signal and filters the third signal using a third analog filter, or the terminal filters the third signal using the third analog filter and transmits the third signal. The first subband is set for downlink transmission on a second time-domain resource, and / or the second subband is set for uplink transmission on the second time-domain resource. The second time-domain resource overlaps with the time-domain resource of the third time-frequency resource. The second time-domain resource does not overlap with the first time-domain resource. The center frequency and / or passband bandwidth of the third analog filter are determined based on at least one of the M subbands.

[0014] In a possible implementation, when the signal transmission direction of the third signal is the same as that of the first signal, the third analog filter is the same as the first analog filter, or the center frequency of the first analog filter is the same as the center frequency of the third analog filter, or the passband bandwidth of the first analog filter is the same as the passband bandwidth of the third analog filter, or the center frequency of the first analog filter is the same as the center frequency of the third analog filter and the passband bandwidth of the first analog filter is the same as the passband bandwidth of the third analog filter.

[0015] Based on the above solutions, when the third analog filter is the same as the first analog filter, the cost of the terminal can be reduced and the complexity of the terminal can be reduced. When the center frequency of the first analog filter is the same as the center frequency of the third analog filter, the switching time between the filtering performed on the first signal on the first time domain resource and the filtering performed on the third signal on the second time domain resource is short. Thereby, the transmission efficiency is improved. Further, when all terminals receive or transmit signals from the first time domain resource to the second time domain resource, or from the second time domain resource to the next time domain resource, the terminal continuously receives or transmits signals and does not require additional switching time.

[0016] In a possible implementation, the center frequency of the third analog filter is determined based on M sub-bands, and the passband bandwidth of the third analog filter is determined based on M sub-bands and the center frequency of the third analog filter. The passband bandwidth of the first analog filter is less than or equal to the passband bandwidth of the third analog filter. Alternatively, the center frequency of the first analog filter is determined based on M sub-bands, and the passband bandwidth of the first analog filter is determined based on M sub-bands and the center frequency of the first analog filter. The passband bandwidth of the first analog filter is greater than or equal to the passband bandwidth of the third analog filter.

[0017] Based on the above solutions, the passband bandwidth of the first analog filter or the passband bandwidth of the third analog filter may not include or may include fewer frequency domain resources of the sub-bands transmitted in the reverse direction, so that the interference of the reverse direction transmission can be reduced.

[0018] In a possible implementation, the center frequency of the first analog filter is different from the center frequency of the third analog filter, or the passband bandwidth of the first analog filter is different from the passband bandwidth of the third analog filter, or the center frequency of the first analog filter is different from the center frequency of the third analog filter and the passband bandwidth of the first analog filter is different from the passband bandwidth of the third analog filter.

[0019] In a possible implementation, the first analog filter is symmetric with respect to the center frequency of the first analog filter, and the third analog filter is symmetric with respect to the center frequency of the third analog filter.

[0020] According to a second aspect, a signal transmission method is provided. This method may be applied to a terminal or may be applied to a chip of the terminal. In this method, the terminal receives first configuration information from a network device. The first configuration information indicates N sub-bands in one carrier, where N is an integer greater than 1. The terminal receives first indication information from the network device, and the first indication information indicates to the terminal to receive or transmit a first signal on a first time-frequency resource. The terminal determines a fourth time-frequency resource based on the first configuration information, and the fourth time-frequency resource is a part or the whole of the first time-frequency resource. The terminal receives the first signal from the network device or transmits the first signal to the network device on the fourth time-frequency resource.

[0021] Based on the above solution, each time the base station schedules the terminal to receive or transmit a signal, a plurality of co-directional sub-bands can be scheduled, so that the control signaling overhead can be reduced.

[0022] In a possible implementation, the first frequency domain resource overlaps with both the first sub-band and the second sub-band. The first sub-band and the second sub-band are two of the N sub-bands. The first sub-band is configured for uplink transmission on the first time domain resource. The second sub-band is configured for downlink transmission on the first time domain resource. The first time domain resource is the time domain resource of the first time-frequency resource. The first frequency domain resource is the frequency domain resource on the first time domain resource.

[0023] In a possible implementation, when the first indication information indicates to the terminal to receive the first signal on the first time-frequency resource, in the first time domain resource, the frequency domain resource of the fourth time-frequency resource does not overlap with the first sub-band, and / or when the first indication information indicates to the terminal to transmit the first signal on the first time-frequency resource, in the first time domain resource, the frequency domain resource of the fourth time-frequency resource does not overlap with the second sub-band.

[0024] In a possible implementation, the first configuration information includes the frequency domain resource information of the BWP, and the frequency domain resource information of the BWP includes the frequency domain resource information of each of the N sub-bands.

[0025] In a possible implementation, the first configuration information includes the configuration information of the uplink BWP, and the configuration information of the uplink BWP includes the frequency domain start position information of the first sub-band and the frequency domain start position information of the third sub-band. The third sub-band is one of the N sub-bands, and / or the first configuration information includes the configuration information of the downlink BWP, and the configuration information of the downlink BWP includes the frequency domain start position information of the second sub-band and the frequency domain start position information of the fourth sub-band. The fourth sub-band is one of the N sub-bands.

[0026] In a possible implementation, in the configuration information of the uplink BWP, there is only one bandwidth information, only one subcarrier spacing information, and only one cyclic prefix type information, and / or in the configuration information of the downlink BWP, there is only one bandwidth information, only one subcarrier spacing information, and only one cyclic prefix type information.

[0027] Based on the above solution, the base station can set the same bandwidth information, the same subcarrier spacing information, and the same cyclic prefix type information for the BWP in one transmission direction. When the terminal receives signals using different BWPs, the terminal does not need to reload the configuration information of that BWP. Thereby, the data transmission delay can be reduced.

[0028] In a possible implementation, in the configuration information of the uplink BWP, there is only one data channel configuration information, only one control channel configuration information, and only one semi-persistent scheduling configuration information, and / or in the configuration information of the downlink BWP, there is only one data channel configuration information, only one control channel configuration information, and only one semi-persistent scheduling configuration information.

[0029] Based on the above solution, the BWPs in the same transmission direction have the same control channel configuration information, the same data channel configuration information, and the same Semi-Persistent Scheduling configuration information. When the terminal receives signals using different BWPs, the terminal does not need to reload the configuration information of that BWP. Thereby, the data transmission delay can be reduced.

[0030] According to a third aspect, a signal transmission method is provided. This method may be applied to a network device or may be applied to a chip of a network device. In this method, the network device transmits first configuration information to a terminal. The first configuration information indicates N sub-bands in one carrier, where N is an integer greater than 1. The network device transmits first indication information to the terminal, and the first indication information indicates to the terminal to receive a first signal or transmit a first signal on a first time-frequency resource. The network device receives the first signal from the terminal or transmits the first signal to the terminal on a fourth time-frequency resource. The fourth time-frequency resource is part or all of the first time-frequency resource.

[0031] For the advantageous effects that can be brought about by this solution and a more detailed description of the solution, please refer to the relevant description of the second aspect.

[0032] According to a fourth aspect, a signal transmission method is provided. This method may be applied to a terminal or may be applied to a chip of a terminal. In this method, the terminal receives first configuration information from a network device. The first configuration information indicates N sub-bands in one carrier, where N is an integer greater than 1. The N sub-bands include a first sub-band and a second sub-band. The first sub-band is configured for uplink transmission on a first time-domain resource. The second sub-band is configured for downlink transmission on the first time-domain resource. The terminal transmits first capability information to the network device. The first capability information includes a switching time. The switching time is one or more of the switching time from signal transmission on the first sub-band on the first time-domain resource to signal reception on the second sub-band on the first time-domain resource, or the switching time from signal reception on the second sub-band on the first time-domain resource to signal transmission on the first sub-band on the first time-domain resource.

[0033] Based on the above solutions, the terminal may report the switching time between different sub-bands for signal reception and transmission, and the base station may perform flexible and efficient scheduling based on the switching time reported by the terminal.

[0034] According to a fifth aspect, a signal transmission method is provided. This method may be applied to a network device or may be applied to a chip of a network device. In this method, the network device transmits first configuration information to the terminal. The first configuration information indicates N sub-bands in one carrier, where N is an integer greater than 1. The N sub-bands include a first sub-band and a second sub-band. The first sub-band is configured for uplink transmission on a first time domain resource. The second sub-band is configured for downlink transmission on the first time domain resource. The network device receives first capability information from the terminal. The first capability information includes a switching time. The switching time includes one or more of the switching time from signal transmission on the first sub-band on the first time domain resource to signal reception on the second sub-band on the first time domain resource, or the switching time from signal reception on the second sub-band on the first time domain resource to signal transmission on the first sub-band on the first time domain resource.

[0035] According to the sixth aspect, a signal transmission method is provided. This method may be applied to a terminal or may be applied to a chip of a terminal. In this method, the terminal receives first configuration information from a network device. The first configuration information indicates N sub-bands in one carrier, where N is an integer greater than 1. The N sub-bands include a first sub-band and a second sub-band. The first sub-band is configured for uplink transmission on a first time domain resource. The second sub-band is configured for downlink transmission on the first time domain resource. The first sub-band is configured for downlink transmission on a second time domain resource. The second sub-band is configured for uplink transmission on the second time domain resource. The terminal reports first capability information. The first capability information includes a switching time. The switching time includes the switching time from signal transmission on the first sub-band on the first time domain resource to signal reception on the second sub-band on the first time domain resource, the switching time from signal reception on the second sub-band on the first time domain resource to signal transmission on the first sub-band on the first time domain resource, the switching time from signal transmission on the first sub-band on the first time domain resource to signal reception on the first sub-band on the second time domain resource, the switching time from signal reception on the second sub-band on the first time domain resource to signal transmission on the second sub-band on the second time domain resource, or the switching time from signal transmission on the first sub-band on the first time domain resource to signal transmission on the second sub-band on the second time domain resource, including one or more of them.

[0036] Based on the above solution, the terminal may report the switching time between different BWPs, and the base station may perform flexible and efficient scheduling based on the switching time reported by the terminal.

[0037] According to a seventh aspect, a signal transmission method is provided. This method may be applied to a network device or may also be applied to a chip of a network device. In this method, the network device transmits first configuration information to a terminal. The first configuration information indicates N sub-bands in one carrier, where N is an integer greater than 1. The N sub-bands include a first sub-band and a second sub-band. The first sub-band is configured for uplink transmission on a first time domain resource. The second sub-band is configured for downlink transmission on the first time domain resource. The first sub-band is configured for downlink transmission on a second time domain resource. The second sub-band is configured for uplink transmission on the second time domain resource. The network device receives first capability information from the terminal. The first capability information includes a switching time. The switching time includes the switching time from signal transmission on the first sub-band on the first time domain resource to signal reception on the second sub-band on the first time domain resource, the switching time from signal reception on the second sub-band on the first time domain resource to signal transmission on the first sub-band on the first time domain resource, the switching time from signal transmission on the first sub-band on the first time domain resource to signal reception on the first sub-band on the second time domain resource, the switching time from signal reception on the second sub-band on the first time domain resource to signal transmission on the second sub-band on the second time domain resource, or the switching time from signal transmission on the first sub-band on the first time domain resource to signal transmission on the second sub-band on the second time domain resource, including one or more of them.

[0038] According to an eighth aspect, a communication device including a transceiver module and a processing module is provided.

[0039] The transceiver module is configured to receive first indication information from the network device. The transceiver module is further configured to receive a first signal, and the processing module is configured to filter the first signal using a first analog filter. Alternatively, the processing module is configured to filter the first signal using a first analog filter, and the transceiver module is further configured to transmit the first signal. For the first analog filter, refer to the relevant description of the first aspect.

[0040] In one design, the first indication information indicates to the terminal to receive a first signal on a first time-frequency resource. The transceiver module is further configured to receive second indication information from the network device, and the second indication information indicates to the terminal to transmit a second signal on a second time-frequency resource. The processing module is further configured to filter the second signal using a second analog filter.

[0041] In one design, the transceiver module is further configured to receive third indication information from the network device, and the third indication information indicates to the terminal to receive or transmit a third signal on a third time-frequency resource. The transceiver module is further configured to receive the third signal, and the processing module is configured to filter the third signal using a third analog filter. Alternatively, the processing module is configured to filter the third signal using a third analog filter, and the transceiver module is further configured to transmit the third signal.

[0042] For a more detailed description of this solution, refer to the relevant description of the first aspect.

[0043] According to a ninth aspect, a communication device including a transceiver module and a processing module is provided. The transceiver module is configured to receive first setting information and first indication information from a network device. The processing module is configured to determine a fourth time-frequency resource based on the first setting information and the first indication information. The transceiver module is further configured to receive a first signal from the network device or transmit the first signal to the network device on the fourth time-frequency resource. For other more detailed descriptions, refer to the related descriptions of the second aspect.

[0044] According to a tenth aspect, a communication device including a transceiver module and a processing module is provided. The transceiver module is configured to transmit first setting information and first indication information to a terminal. The processing module is configured to determine a fourth time-frequency resource based on the first setting information and the first indication information. The transceiver module is further configured to receive a first signal from the terminal or transmit the first signal to the terminal on the fourth time-frequency resource. For other more detailed descriptions, refer to the related descriptions of the third aspect.

[0045] According to an eleventh aspect, a communication device including a transceiver module and a processing module is provided.

[0046] The transceiver module is configured to receive first setting information from a network device. The processing module is configured to generate first capability information, and the first capability information includes a switching time. The transceiver module is further configured to transmit the first capability information to the network device. For other more detailed descriptions, refer to the related descriptions of the fourth aspect or the sixth aspect.

[0047] According to the 12th aspect, a communication device including a transceiver module and a processing module is provided.

[0048] The processing module is configured to generate first setting information. The transceiver module is configured to transmit the first setting information to a terminal and is further configured to receive first capability information from the terminal. The first capability information includes a switching time. For more detailed explanations, refer to the relevant explanations in the 5th aspect or the 7th aspect.

[0049] According to the 13th aspect, a communication device including a processor is provided. The processor is coupled to a memory. The memory is configured to store a computer program or instructions. The processor is configured to execute the computer program or instructions to implement a method by various possible implementations in various aspects. The memory may be located inside the device or outside the device. There may be one or more processors.

[0050] According to the 14th aspect, the present application provides a communication device including a processor and an interface circuit. The interface circuit is configured to communicate with another device. The processor is configured to execute a method by various possible implementations in various aspects.

[0051] According to the 15th aspect, a communication device is provided. This device includes a logic circuit and an input / output interface.

[0052] In one example, the input / output interface is configured to input first indication information from a network device, and the first indication information indicates to the terminal to receive or transmit a first signal on a first time-frequency resource. The input / output interface is further configured to input the first signal. The logic circuit is configured to filter the first signal using a first analog filter. Alternatively, the logic circuit is configured to filter the first signal using a first analog filter, and the input / output interface is further configured to output the first signal. The center frequency and / or passband bandwidth of the first analog filter are determined based on M sub-bands, where M is an integer greater than 1. The M sub-bands include a first sub-band and a second sub-band. The first sub-band is set for uplink transmission on a first time-domain resource, and the second sub-band is set for downlink transmission on the first time-domain resource. The first time-domain resource overlaps with the time-domain resource of the first time-frequency resource. For a more detailed description of this solution, refer to the related description of the first aspect.

[0053] In another example, the input / output interface is configured to input first configuration information from a network device. The first configuration information indicates N sub-bands in one carrier, where N is an integer greater than 1. The input / output interface is further configured to input first indication information from the network device, and the first indication information indicates to the terminal to receive or transmit a first signal on a first time-frequency resource. The logic circuit is configured to determine a fourth time-frequency resource based on the first configuration information and the first indication information. The fourth time-frequency resource is a part or the whole of the first time-frequency resource. The input / output interface is further configured to input the first signal from the network device or output the first signal to the network device on the fourth time-frequency resource. For a more detailed description of this solution, refer to the relevant description of the second aspect.

[0054] According to a sixteenth aspect, the present application provides a communication system including a terminal configured to execute a method according to various possible implementations of the second aspect and a network device configured to execute a method according to various possible implementations of the third aspect, or a terminal configured to execute a method according to various possible implementations of the fourth aspect and a network device configured to execute a method according to various possible implementations of the fifth aspect.

[0055] According to a seventeenth aspect, the present application further provides a chip system including a processor configured to execute a method according to various possible implementations of various aspects.

[0056] According to an eighteenth aspect, the present application further provides a computing program product including computer-executable instructions. When the computer-executable instructions are executed on a computer, methods according to various possible implementations of various aspects are implemented.

[0057] According to the 19th aspect, the present application further provides a computer-readable storage medium. This computer-readable storage medium stores a computer program or instructions. When the instructions are executed on a communication device, methods according to various possible implementations in various aspects are implemented.

Brief Description of the Drawings

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Mode for Carrying Out the Invention

[0059] FIG. 1 is a schematic diagram of the architecture of a communication system 1000 to which an embodiment of the present application is applied. As shown in FIG. 1, this communication system includes a radio access network 100 and a core network 200. Optionally, the communication system 1000 may further include the Internet 300. The radio access network 100 may include at least one radio access network device (e.g., 110a and 110b in FIG. 1), and may further include at least one terminal (e.g., 120a to 120j in FIG. 1). The terminal is connected to the radio access network device in a wireless manner, and the radio access network device is connected to the core network in a wireless or wired manner. The core network device and the radio access network device may be independent and different physical devices, or the functions of the core network device and the logical functions of the radio access network device may be integrated into the same physical device, or a part of the functions of the core network device and a part of the functions of the radio access network device may be integrated into one physical device. The terminal is connected to the terminal in a wired or wireless manner, and the radio access network device is connected to the radio access network device in a wired or wireless manner. FIG. 1 is merely a schematic diagram. The communication system may further include other network devices. For example, the communication system may further include a wireless relay device and a wireless backhaul device not shown in FIG. 1.

[0060] A wireless access network device may also be referred to as a network device, such as a base station, evolved NodeB (eNodeB), transmission reception point (TRP), next generation NodeB (gNB) of a 5th generation (5G) mobile communication system, next generation base station of a 6th generation (6G) mobile communication system, base station of a future mobile communication system, access node of a Wi-Fi system, etc., or may be a module or unit that completes a part of the functions of a base station, such as a central unit (CU) or a distributed unit (DU). The CU may complete the functions of the radio resource control protocol and packet data convergence protocol (PDCP) of the base station, and may further complete the function of the service data adaptation protocol (SDAP). The DU may complete the functions of the radio link control layer and the medium access control (MAC) layer of the base station, and may further complete some or all of the functions of the physical layer. For specific descriptions of the above protocol layers, please refer to the relevant technical specifications of the 3rd generation partnership project (3GPP). The wireless access network device may be a macro base station (e.g., 110a in FIG. 1), a micro base station or an indoor base station (e.g., 110b in FIG. 1), or may be a relay node or a donor node, etc. The specific technologies and specific device forms used in the wireless access network device are not limited in the embodiments of the present application. For the sake of easy explanation, hereinafter, an example where the base station is a wireless access network device will be used for explanation. SP

[0061] ​ A terminal may also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal, etc. The terminal device can be widely used in various scenarios, such as device-to-device (D2D) scenarios, vehicle-to-everything (V2X) communication scenarios, machine-type communication (MTC) scenarios, Internet of things (IoT) scenarios, virtual reality scenarios, augmented reality scenarios, industrial control scenarios, autonomous driving scenarios, telemedicine scenarios, smart grid scenarios, smart furniture scenarios, smart office scenarios, smart wearable scenarios, smart transportation scenarios, and smart city scenarios. The terminal device may be a mobile phone, a tablet computer, a computer with a wireless transceiver function, a wearable device, a vehicle, a drone, a helicopter, an aircraft, a ship, a robot, a robotic arm, a smart home device, etc. The specific technologies and specific device forms used in the terminal are not limited in the embodiments of the present application.

[0062] The base station and the terminal may be fixed or mobile. The base station and the terminal may be deployed on the ground, such as indoor devices, outdoor devices, handheld devices or in-vehicle devices, may be deployed on water, or may be deployed on aircraft, balloons and satellites in the air. The application scenarios of the base station and the terminal are not limited in the embodiments of the present application.

[0063] The roles of the base station and the terminal can be relative. For example, the helicopter or unmanned aircraft 120i in FIG. 1 may be configured as a mobile base station, and for the terminal 120j accessing the wireless access network 100 via 120i, 120i is a base station. However, for the base station 110a, 120i is a terminal. In other words, the communication between 110a and 120i is executed using a wireless air interface protocol. Of course, alternatively, the communication between 110a and 120i may be executed using an interface protocol between base stations. In this case, compared with 110a, 120i serves as a base station as an alternative. Therefore, both the base station and the terminal may be collectively referred to as communication devices. 110a and 110b in FIG. 1 may be referred to as communication devices having the functions of a base station, and 120a to 120j in FIG. 1 may be referred to as communication devices having the functions of a terminal.

[0064] Communication can be executed between a base station and a terminal, between base stations, and between terminals via an authorized spectrum, an unauthorized spectrum, or both an authorized spectrum and an unauthorized spectrum. Communication can be executed via a spectrum below 6 gigahertz (GHz), a spectrum above 6 GHz, or both a spectrum below 6 GHz and a spectrum above 6 GHz. The spectrum resources for wireless communication are not limited in the embodiments of the present application.

[0065] In the embodiments of the present application, the functions of the base station may be executed by a module (such as a chip) within the base station as an alternative, or may be executed by a control subsystem including the functions of the base station. The control subsystem including the functions of the base station in this specification may be a control center in the above application scenarios such as smart grid, industrial control, smart transportation, and smart city. The functions of the terminal may be executed by a module (such as a chip or a modem) within the terminal as an alternative, or may be executed by a device including the functions of the terminal.

[0066] In the present application, the base station transmits a downlink signal or downlink information to the terminal, and the downlink information is carried on a downlink channel. The terminal transmits an uplink signal or uplink information to the base station, and the uplink information is carried on an uplink channel. To communicate with the base station, the terminal needs to establish a wireless connection with a cell controlled by the base station. The cell that establishes a wireless connection with the terminal is called the serving cell of the terminal. When the terminal communicates with the serving cell, the terminal is further interfered by signals from neighboring cells.

[0067] In embodiments of the present application, the time-domain symbol can be an orthogonal frequency division multiplexing (OFDM) symbol or a discrete Fourier transform-spread OFDM (DFT-s-OFDM) symbol. Unless otherwise specified, all symbols in the embodiments of the present application are time-domain symbols.

[0068] In the present application, a signal can include a data channel, a control channel, and a reference signal. Signal transmission can be uplink transmission, that is, the terminal transmits a signal to the base station, or downlink transmission, that is, the base station transmits a signal to the terminal. When transmission is a verb, transmission can be replaced with transmit / receive.

[0069] To facilitate the understanding of the technical solutions provided in the embodiments of the present application, the following describes and elaborates on the technical terms used in the embodiments of the present application.

[0070] (1) Cell: The coverage of each network device can be divided into one or more cells. In the current NR standard, one downlink carrier may be configured for one cell, and optionally, at least one uplink carrier may also be configured for one cell. For a terminal device, the cell that provides services to the terminal device is called the serving cell. The cell in this application may alternatively be the serving cell.

[0071] (2) Carrier: The frequency domain resources configured for one cell may be called a carrier. For example, the downlink frequency domain resources configured for one cell may be called a downlink carrier, and the continuous uplink frequency domain resources configured for one cell may be called an uplink carrier.

[0072] (3) Bandwidth Part (BWP): A bandwidth part is a segment of continuous frequency domain resources on one carrier. After one BWP is configured and activated, that BWP is called the active BWP. Currently, one terminal can have only one active downlink BWP on one downlink carrier and only one active uplink BWP on one uplink carrier. The terminal transmits uplink data and control information on the active uplink BWP and receives downlink data and control information on the active downlink BWP.

[0073] (4) Sub-band: A sub-band is a segment of continuous frequency domain resources. In the embodiments of this application, a sub-band may be a segment of continuous frequency domain resources within one BWP. Alternatively, the bandwidth of a sub-band may be the same as the bandwidth of a BWP, that is, one sub-band may alternatively be one BWP.

[0074] (5) Passband, transition band, and stopband of the filter: Refer to FIG. 2. The passband, transition band, and stopband of the filter are shown. The frequency regions below P1 and above P4 can be regarded as the stopband of the filter, and signals within the stopband range cannot pass through the filter, or the filter strongly suppresses signals within the stopband. The frequency regions greater than P1 and less than P2 and greater than P3 and less than P4 can be regarded as the transition band of the filter, and signals within the transition band may be attenuated and distorted when the signals pass through the filter. Frequencies greater than P2 and less than P3 can be regarded as the passband of the analog filter, and signals within the passband range can pass through the filter without attenuation or distortion.

[0075] (6) Analog filter: An analog filter is a filter in the analog domain. For example, switching an analog filter such as changing the bandwidth or center frequency requires a specified switching time. The switching time of a digital domain filter is short and can be regarded as almost real-time switching.

[0076] Embodiments of the present application provide a signal transmission method to reduce signal transmission delay. FIG. 3 is an exemplary flowchart of the signal transmission method according to the embodiments of the present application. The first time domain resource in the present embodiment of the present application is a time unit of the time domain pattern of a subband. The time unit can be one or more subframes, one or more slots, or one or more time domain symbols.

[0077] S301: The base station transmits the first setting information to the terminal. Correspondingly, the terminal receives the first setting information from the base station. The first setting information indicates N subbands in one carrier. N is an integer greater than 1.

[0078] In a possible implementation, the first configuration information includes frequency domain resource information of the BWP and frequency domain resource information of N sub-bands. In another possible implementation, the first configuration information includes frequency domain resource information of the BWP, and the frequency domain resource information of the BWP includes frequency domain resource information of N sub-bands. In yet another possible implementation, the frequency domain resource information of the BWP and the frequency domain resource information of N sub-bands are separately carried by two signalings. In other words, the first configuration information is carried by the first signaling, and the frequency domain resource information of N sub-bands is carried by the second signaling. In the above three implementations, the N sub-bands may be N sub-bands within one BWP. The frequency domain resources of the BWP may include a first sub-band and a second sub-band. The first sub-band and the second sub-band are two of the N sub-bands. The first sub-band is set on the first time domain resource for uplink transmission. The second sub-band is set on the first time domain resource for downlink transmission. The BWP may be an uplink BWP, a downlink BWP, a BWP used for both uplink and downlink, or a BWP where uplink and downlink are not distinguished.

[0079] In the present embodiment of the present application, the frequency domain resource information may include frequency domain start position information and / or bandwidth information. Since the frequency domain resource information of the BWP may include one or more frequency domain start position information, each of the frequency domain start position information may correspond to the frequency domain start position of one sub-band. For example, when the frequency domain resource information of the BWP includes frequency domain start position P1, frequency domain start position P2, and frequency domain start position P3, the frequency domain start position P1 may correspond to the first sub-band, the frequency domain start position P2 may correspond to the second sub-band, and the frequency domain start position P3 may correspond to the third sub-band.

[0080] The bandwidth information in the frequency domain resource information of the BWP may be the bandwidth information of the sub-bands corresponding to the respective frequency domain start positions in the BWP. In other words, the bandwidths of the respective sub-bands may be the same. In the above example, the frequency domain start positions of the first sub-band, the second sub-band, and the third sub-band may be the frequency domain start position P1, the frequency domain start position P2, and the frequency domain start position P3, respectively. The bandwidths of the first sub-band, the second sub-band, and the third sub-band are the bandwidths indicated by the bandwidth information. Please refer to FIG. 4. The bandwidths of the first sub-band, the second sub-band, and the third sub-band are the same and are the same as the bandwidth d1 indicated by the bandwidth information.

[0081] In another example, the bandwidth indicated by the bandwidth information in the frequency domain resource information of the BWP is greater than or equal to the bandwidth of the sub-band corresponding to the frequency domain start position. For example, the bandwidths of the first sub-band, the second sub-band, and the third sub-band are all less than or equal to the bandwidth indicated by the bandwidth information, and the bandwidths of the first sub-band, the second sub-band, and the third sub-band may be the same or different. As shown in FIG. 5, the bandwidth of the first sub-band is the same as the bandwidth of the second sub-band, both being d1, and the bandwidth of the third sub-band is d2. Both d1 and d2 are less than or equal to the bandwidth d3 indicated by the bandwidth information.

[0082] As shown in FIG. 4, it should be noted that the above frequency domain start positions may correspond to different sub-bands, and the sub-bands may be continuous frequency domain resources. Alternatively, as shown in FIG. 5, there may be an interval between the sub-bands. This is not particularly limited in the present application. The interval between two adjacent sub-bands in the frequency domain may be the same or different.

[0083] In another possible implementation, the first configuration information may include the configuration information of the uplink BWP. The configuration information of the uplink BWP may include the frequency domain start position information of the first sub-band and the frequency domain start position information of the third sub-band. The first sub-band and the third sub-band may be two of the N sub-bands. The configuration information of the uplink BWP may include one bandwidth information, one sub-carrier spacing information, and one cyclic prefix type information. In other words, the bandwidth, sub-carrier spacing, and cyclic prefix type of the first sub-band are the same as those of the third sub-band.

[0084] Based on the above solution, the base station may configure multiple BWPs for the terminal, and for multiple BWPs in the same transmission direction, the same sub-carrier spacing information and cyclic prefix type information may be configured, so the control signaling overhead can be reduced.

[0085] Optionally, there may be only one data channel configuration information in the configuration information of the uplink BWP, that is, the data channel configuration information of the first sub-band is the same as that of the third sub-band. Alternatively, there may be only one control channel configuration information in the configuration information of the uplink BWP, that is, the control channel configuration information of the first sub-band is the same as that of the third sub-band. Alternatively, there may be only one semi-persistent scheduling configuration information in the configuration information of the uplink BWP, that is, the semi-persistent scheduling configuration information of the first sub-band is the same as that of the third sub-band.

[0086] It should be noted that although the first sub-band and the third sub-band may be configured for uplink transmission, the time periods during which the first sub-band and the third sub-band are configured for uplink transmission may be the same or different.

[0087] In a possible implementation, the first configuration information may include the configuration information of the downlink BWP. The configuration information of the downlink BWP may include the frequency domain start position information of the second sub-band and the frequency domain start position information of the fourth sub-band. The second sub-band and the fourth sub-band may be two of the N sub-bands. The configuration information of the downlink BWP may include one bandwidth information, one sub-carrier spacing information, and one cyclic prefix type information. In other words, the bandwidth, sub-carrier spacing, and cyclic prefix type of the second sub-band are the same as those of the fourth sub-band.

[0088] Optionally, there may be only one data channel configuration information in the downlink BWP configuration information, that is, the data channel configuration information of the second sub-band is the same as the data channel configuration information of the fourth sub-band. Alternatively, there may be only one control channel configuration information in the downlink BWP configuration information, that is, the control channel configuration information of the second sub-band is the same as the control channel configuration information of the fourth sub-band. Alternatively, there may be only one semi-persistent scheduling configuration information in the downlink BWP configuration information, that is, the semi-persistent scheduling configuration information of the second sub-band is the same as the semi-persistent scheduling configuration information of the fourth sub-band.

[0089] It should be noted that the second sub-band and the fourth sub-band may be configured for downlink transmission, but the time periods during which the second sub-band and the fourth sub-band are configured for downlink transmission may be the same or different.

[0090] In a possible implementation, the first configuration information may include sub-band configuration information. The sub-band configuration information may be a time-domain pattern of the sub-band. Each of the sub-bands corresponds to one time-domain pattern, indicating whether the sub-band is used for uplink transmission or downlink transmission on one time-domain resource.

[0091] For example, for two sub-bands among N sub-bands, such as the first sub-band and the second sub-band on the same time-domain resource, where the frequency-domain resources of one sub-band are adjacent to those of the other sub-band, one sub-band may be configured for uplink transmission and the other sub-band may be configured for downlink transmission.

[0092] As shown in FIG. 6, on the first time-domain resource T1, the first sub-band and the third sub-band are configured for uplink transmission, and the second sub-band and the fourth sub-band are configured for downlink transmission. On the second time-domain resource T2, the first sub-band, the second sub-band, the third sub-band, and the fourth sub-band are all configured for uplink transmission. It can be understood that FIG. 6 is merely an example. For a specific sub-band, the time-domain resources used for uplink transmission and the time-domain resources used for downlink transmission are not limited in the embodiments of the present application. In the present embodiment of the present application, "D" indicates that the sub-band is configured for downlink transmission, and "U" indicates that the sub-band is configured for uplink transmission.

[0093] S302: The base station transmits the first indication information to the terminal. Correspondingly, the terminal receives the first indication information from the base station.

[0094] The first indication information indicates to the terminal to receive or transmit a first signal on a first time-frequency resource. The frequency-domain resource of the first time-frequency resource (abbreviated as the first frequency-domain resource) may overlap with both a first sub-band and a second sub-band. The time-domain resource of the first time-frequency resource is assumed to overlap with a first time-domain resource. For example, as shown in FIG. 6, on the first time-domain resource, the first sub-band is set for uplink transmission and the second sub-band is set for downlink transmission.

[0095] S303: The terminal determines a fourth time-frequency resource based on the first configuration information and the first indication information, and the fourth time-frequency resource is a part or the whole of the first time-frequency resource.

[0096] S304: The terminal receives or transmits the first signal on the fourth time-frequency resource to the base station.

[0097] In a possible implementation, the first time-frequency resource indicated by the first indication information may include a part or the whole of the frequency-domain resource on the first sub-band and a part or the whole of the frequency-domain resource on the second sub-band. When the first indication information indicates to receive the first signal on the first time-frequency resource, the terminal may determine, based on the first configuration information, that the frequency-domain resource of the fourth time-frequency resource does not overlap with the first sub-band on the first time-domain resource. When the first indication information indicates to transmit the first signal on the first time-frequency resource, the terminal may determine, based on the first configuration information, that the frequency-domain resource of the fourth time-frequency resource does not overlap with the second sub-band on the first time-domain resource.

[0098] For example, the first set of configuration information indicates frequency domain resource information for a first sub-band, a second sub-band, and a third sub-band. The first sub-band and the third sub-band are configured for uplink transmission on T1, and the second sub-band is configured for downlink transmission on T1. Please refer to FIG. 7. When the first indication information indicates to the terminal to receive a first signal on a first time-frequency resource, the terminal may receive the first signal on a fourth time-frequency resource. The fourth time-frequency resource is a time-frequency resource on the first time-frequency resource that overlaps with the second sub-band in the frequency domain. Please refer to FIG. 8. When the first indication information indicates to the terminal to transmit a first signal on a first time-frequency resource, the terminal may transmit the first signal on a fourth time-frequency resource. The fourth time-frequency resource is a time-frequency resource on the first time-frequency resource that overlaps with the first sub-band in the frequency domain, and the fourth time-frequency resource is a time-frequency resource on the first time-frequency resource that overlaps with the third sub-band in the frequency domain.

[0099] Optionally, when the first indication information indicates to the terminal to receive a first signal on a first time-frequency resource and all sub-bands overlapping with the first time-frequency resource are configured for uplink transmission, the terminal may determine that the current scheduling is invalid. In this case, the terminal does not receive the first signal on the first time-frequency resource.

[0100] Based on the above solution, each time the base station schedules the terminal to receive or transmit a signal, multiple sub-bands in the same direction may be scheduled. The multiple sub-bands in the same direction may be continuous in the frequency domain or discontinuous in the frequency domain. Since the multiple sub-bands in the same direction can be scheduled at once, the control signaling overhead can be reduced.

[0101] In another possible implementation, the terminal is instructed to receive the first signal on the first time-frequency resource, and when the first frequency-domain resource does not overlap with the sub-band configured for uplink transmission within the time-domain range of the first time-frequency resource, the fourth time-frequency resource is the entire first time-frequency resource. When the terminal is instructed to transmit the first signal on the first time-frequency resource, and when the first frequency-domain resource does not overlap with the sub-band configured for downlink transmission within the time-domain range of the first time-frequency resource, the fourth time-frequency resource is the entire first time-frequency resource.

[0102] In a possible implementation, only one sub-band is activated on the first time-domain resource, that is, the terminal can transmit or receive signals only on one sub-band. As shown in FIG. 8, both the first sub-band and the third sub-band are configured for uplink transmission on the first time-domain resource. When the first indication information instructs the terminal to transmit the first signal on the first time-frequency resource, only one of the first sub-band and the third sub-band is activated. When the first sub-band is activated, the fourth time-frequency resource is the time-frequency resource on the first time-frequency resource that overlaps with the first sub-band in the frequency domain. It can be understood that the base station also needs to determine the fourth time-frequency resource in order to transmit or receive the first signal. The method by which the base station determines the fourth time-frequency resource may be the same as the method by which the terminal determines the fourth time-frequency resource. However, the base station may not use the first configuration information and the first indication information as they are, but only use the values of specific parameters in the first configuration information and the first indication information to determine the fourth time-frequency resource. For simplicity, it may also be briefly stated that the base station determines the fourth time-frequency resource based on the first configuration information and the first indication information.

[0103] Embodiments of the present application further provide another signal transmission method. FIG. 9 is an exemplary flowchart of a signal transmission method according to an embodiment of the present application. This method may include the following operations.

[0104] S901: The base station transmits first indication information to the terminal, and correspondingly, the terminal receives the first indication information from the base station.

[0105] The first indication information indicates to the terminal to receive or transmit a first signal on a first time-frequency resource.

[0106] S902: The base station and the terminal transmit a first signal on the first time-frequency resource. Specifically, the base station transmits the first signal to the terminal, or the terminal transmits the first signal to the base station.

[0107] S903: The terminal filters the first signal using a first analog filter.

[0108] When the first indication information indicates to the terminal to receive a first signal on the first time-frequency resource, the terminal may receive the first signal from the base station on the first time-frequency resource and filter the first signal using the first analog filter.

[0109] When the first indication information indicates to the terminal to transmit a first signal on the first time-frequency resource, the terminal may filter the first signal using the first analog filter and transmit the first signal to the base station on the first time-frequency resource.

[0110] The center frequency of the first analog filter is determined based on M sub-bands. The passband bandwidth of the first analog filter may also be determined based on M sub-bands. The M sub-bands may be sub-bands set by the base station for the terminal, and M is an integer greater than 1. The M sub-bands may be included in the frequency domain range of one BWP. For example, the base station may set one BWP for the terminal, and the BWP may include M sub-bands. Alternatively, the M sub-bands may be included in the frequency domain range of one carrier. For example, the base station may set multiple BWPs for the terminal on one carrier, and one BWP may include one of the M sub-bands.

[0111] It should be noted that the M sub-bands include a first sub-band and a second sub-band. The first sub-band is set for uplink transmission on the first time domain resource, and the second sub-band is set for downlink transmission on the first time domain resource. The first time domain resource may overlap with the time domain resource of the first time-frequency resource.

[0112] In a possible implementation, the M sub-bands may be included in the passband range of the first analog filter. Alternatively, the M sub-bands may be included in the passband range of the first analog filter and the transition band range of the first analog filter. In other words, the M sub-bands are not in the stopband range of the first analog filter. Alternatively, the difference between the frequency response of the passband of the first analog filter and the frequency response of the edge frequencies of the first analog filter within the M sub-bands, or the ratio of the frequency response of the passband of the first analog filter to the frequency response of the edge frequencies of the first analog filter within the M sub-bands, is less than or equal to a first predetermined value. Refer to Figure 2. L1 is the frequency response of the passband of the first analog filter. P i and P j are the edge frequencies within the M sub-bands, where P iis the minimum frequency of the M sub-bands, and P j is the maximum frequency of the M sub-bands, and L2 is the frequency response of the edge frequencies within the M sub-bands. That is, (|L1 - L2|) or (L1:L2) is less than or equal to a first predetermined value.

[0113] Refer to FIG. 10. Assume that the M sub-bands include the first sub-band and the second sub-band described above. The center frequency of the first analog filter is the center of the frequency domain resources occupied by the first sub-band and the second sub-band. The passband bandwidth of the first analog filter includes the first sub-band and the second sub-band. The terminal may receive a first signal on a first time-frequency resource, where the first time-frequency resource overlaps with the second sub-band in the frequency domain (e.g., the first time-frequency resource is the time-frequency resource corresponding to the shaded pattern in the second sub-band of FIG. 10), and may filter the first signal using the first analog filter. Alternatively, the terminal may filter the first signal using the first analog filter and transmit the first signal on the first time-frequency resource. The first time-frequency resource overlaps with the first sub-band in the frequency domain (e.g., the first time-frequency resource is the time-frequency resource corresponding to the shaded pattern in the first sub-band of FIG. 10).

[0114] It should be noted that the center frequency of the analog filter according to the embodiment of the present application is the center of the frequency domain resource occupied by L sub-bands. This center may be the center frequency of the frequency domain resource occupied by L sub-bands, or may be a frequency within a specific range of the deviation between that frequency and the center frequency of the frequency domain resource occupied by L sub-bands. L is a positive integer, and the L sub-bands may be M sub-bands, or may be L of the M sub-bands. For example, the frequency domain resource occupied by L sub-bands is 30 MHz. When the terminal does not have an analog filter with a passband of 30 MHz, the terminal may use an analog filter with a minimum passband bandwidth exceeding 30 MHz, such as an analog filter with a passband bandwidth of 40 MHz. In this case, the difference between the center frequency of the analog filter and the center of the frequency domain resource occupied by L sub-bands is less than 5 MHz.

[0115] Based on the above solution, when the terminal receives a signal and when the terminal transmits a signal, the center frequency of the downlink analog filter is the same as the center frequency of the uplink analog filter. Thereby, the switching time between uplink transmission and downlink transmission can be shortened, the complexity of the terminal can be reduced, and the cost of the terminal can be reduced.

[0116] When the first indication information indicates to the terminal to receive the first signal on the first time-frequency resource, the base station may alternatively transmit the second indication information to the terminal. The second indication information indicates to the terminal to transmit the second signal on the second time-frequency resource. The first time-frequency resource does not overlap with the second time-frequency resource in the time domain. The time domain resource of the second time-frequency resource overlaps with the above-mentioned first time Region resource.

[0117] Before the terminal transmits the second signal, the terminal filters the second signal using a second analog filter. Since the center frequency of the second analog filter may be the same as the center frequency of the first analog filter, the switching delay between the filtering performed by the filter for the uplink signal and the filtering performed by the filter for the downlink signal is reduced. Hereinafter, a method for determining the center frequency and the passband bandwidth of the first analog filter and the center frequency and the passband bandwidth of the second analog filter will be described in detail.

[0118] In a possible implementation, the center frequency of the first analog filter and the center frequency of the second analog filter may be the center of the frequency domain resources occupied by M sub-bands. Refer to FIG. 11. The M sub-bands may include a first sub-band, a second sub-band, and a third sub-band. The first sub-band is set for uplink transmission on the first time domain resource, the second sub-band is set for downlink transmission on the first time domain resource, and the third sub-band is set for uplink transmission on the first time domain resource. It is assumed that the frequency domain resources occupied by the first sub-band are from f0 + 25 MHz to f0 + 30 MHz, the frequency domain resources occupied by the second sub-band are from f0 + 15 MHz to f0 + 20 MHz, and the frequency domain resources occupied by the third sub-band are from f0 to f0 + 10 MHz. Each of the center frequency of the first analog filter and the center frequency of the second analog filter is the center of the frequency domain resources occupied by the first sub-band, the second sub-band, and the third sub-band, that is, f0 + 15 MHz which is the center of f0 to f0 + 30 MHz. f0 is the frequency of the carrier.

[0119] In another possible implementation, the center frequency of the first analog filter and the center frequency of the second analog filter may be determined based on P out of M sub-bands. The P sub-bands are set for downlink transmission on the first time-domain resource, and P is a positive integer. Each of the center frequency of the first analog filter and the center frequency of the second analog filter may be the center of the frequency-domain resource occupied by the P sub-bands. Refer to FIG. 12. Each of the center frequency of the first analog filter and the center frequency of the second analog filter is the center of the frequency-domain resource occupied by the second sub-band, that is, f0 + 17.5 MHz which is the center from f0 + 15 MHz to f0 + 20 MHz. The definitions of the first sub-band, the second sub-band, and the third sub-band in this figure are the same as the definitions of the first sub-band, the second sub-band, and the third sub-band in FIG. 11.

[0120] In a possible implementation, the center frequency of the first analog filter and the center frequency of the second analog filter may be determined based on K out of M sub-bands. The K sub-bands are set for uplink transmission on the first time domain resource, and K is a positive integer. Each of the center frequency of the first analog filter and the center frequency of the second analog filter may be the center of the frequency domain resource occupied by the K sub-bands. Refer to FIG. 13. The M sub-bands may include a first sub-band and a second sub-band. The first sub-band is set for uplink transmission on the first time domain resource, and the second sub-band is set for downlink transmission on the first time domain resource. It is assumed that the frequency domain resource occupied by the first sub-band is from f0 + 15 MHz to f0 + 20 MHz, and the frequency domain resource occupied by the second sub-band is from f0 to f0 + 10 MHz. Each of the center frequency of the first analog filter and the center frequency of the second analog filter is the center of the frequency domain resource occupied by the first sub-band, that is, f0 + 17.5 MHz which is the center of f0 + 15 MHz to f0 + 20 MHz. f0 is the frequency of the carrier.

[0121] Note that the center frequency of the first analog filter and the center frequency of the second analog filter may alternatively be located between the center frequencies determined by the above three methods. For example, the center of the frequency domain resource occupied by the M sub-bands is P1, the center of the frequency domain resource occupied by the P sub-bands is P2, and the center of the frequency domain resource occupied by the K sub-bands is P3. In this case, the center frequency of the first analog filter and the center frequency of the second analog filter may be any frequency between P1 and P2, any frequency from P1 to P3, or any frequency between P2 and P3.

[0122] In one example, the passband bandwidth of the first analog filter is the same as the passband bandwidth of the second analog filter. For example, as shown in FIGS. 11 to 13, the passband bandwidth of the first analog filter and the passband bandwidth of the second analog filter may include the frequency domain resources occupied by M sub-bands and are separately symmetric with respect to the center frequency. In the embodiments of the present application, it should be noted that unless otherwise specified, the passband bandwidth of the filter is symmetric with respect to the center frequency of the filter. That the passband bandwidth is symmetric with respect to the center frequency can be understood as meaning that the magnitudes of the passband bandwidths included on both sides of the center frequency are the same.

[0123] In another example, the passband bandwidth of the first analog filter is different from the passband bandwidth of the second analog filter. The passband bandwidth of the first analog filter may be determined based on P sub-bands and the center frequency of the first analog filter. The passband bandwidth of the first analog filter may include the frequency domain resources occupied by P sub-bands. Alternatively, the passband bandwidth of the first analog filter may be determined based on M sub-bands. The passband bandwidth of the first analog filter may include the frequency domain resources occupied by M sub-bands. Further, the passband bandwidth of the second analog filter may be determined based on K sub-bands and the center frequency of the second analog filter. The passband bandwidth of the second analog filter may include the frequency domain resources occupied by K sub-bands. Alternatively, the passband bandwidth of the second analog filter is determined based on M sub-bands. The passband bandwidth of the second analog filter may include the frequency domain resources occupied by M sub-bands.

[0124] Hereinafter, a case where the passband bandwidth of the first analog filter is different from the passband bandwidth of the second analog filter will be described using specific embodiments as examples.

[0125] Please refer to FIG. 14. The center frequency of the first analog filter and the center frequency of the second analog filter are each at the center of the frequency domain resources occupied by the first sub-band, the second sub-band, and the third sub-band. The passband bandwidth of the first analog filter includes the frequency domain resources occupied by the second sub-band. The passband bandwidth of the second analog filter includes the frequency domain resources occupied by the first sub-band, the second sub-band, and the third sub-band. The definitions of the first sub-band, the second sub-band, and the third sub-band in this figure are the same as the definitions of the first sub-band, the second sub-band, and the third sub-band in FIG. 11.

[0126] Please refer to FIG. 15. Assume that M sub-bands include the first sub-band and the second sub-band. The first sub-band is set for uplink transmission on the first time domain resource, and the second sub-band is set for downlink transmission on the first time domain resource. The center frequency of the first analog filter and the center frequency of the second analog filter may each be at the center of the frequency domain resources occupied by the first sub-band. The passband bandwidth of the first analog filter includes the frequency domain resources occupied by the second sub-band. The passband bandwidth of the second analog filter may include the frequency domain resources occupied by the first sub-band.

[0127] Please refer to FIG. 16. The center frequency of the first analog filter and the center frequency of the second analog filter are each at the center of the frequency domain resources occupied by the second sub-band. The passband bandwidth of the first analog filter includes the frequency domain resources occupied by the second sub-band. The passband bandwidth of the second analog filter includes the frequency domain resources occupied by the first sub-band, the second sub-band, and the third sub-band. The definitions of the first sub-band, the second sub-band, and the third sub-band in this figure are the same as the definitions of the first sub-band, the second sub-band, and the third sub-band in FIG. 11.

[0128] Based on the above solution, since the center frequency of the first analog filter is the same as that of the second analog filter, the switching delay between the filtering performed by the terminal on the received signal and the filtering performed by the terminal on the transmitted signal is short. Furthermore, the existing analog filter can be reused. This reduces the complexity of the terminal and cuts the cost of the terminal. When the passband bandwidth of the first analog filter is different from that of the second analog filter, for example, the passband bandwidth of the first analog filter includes the frequency domain resources occupied by the subbands set for downlink transmission and, as little as possible, the frequency domain resources occupied by the subbands set for uplink transmission. In addition, the passband bandwidth of the first analog filter or the passband bandwidth of the second analog filter may include, as little as possible, the frequency domain resources occupied by the subbands in the opposite transmission direction in addition to the frequency domain resources occupied by the subbands in the same direction transmission. Therefore, interference in the opposite direction can be reduced and the transmission performance can be improved.

[0129] In a possible implementation, alternatively, the terminal may receive third indication information from the base station. The third indication information indicates to the terminal to transmit or receive a third signal on a third time-frequency resource. The terminal may filter the third signal using a third analog filter. The center frequency and / or passband bandwidth of the third analog filter are determined based on at least one of the M sub-bands. The time-domain resource of the third time-frequency resource does not overlap with the first time-domain resource. The time-domain resource of the third time-frequency resource overlaps with the second time-domain resource. The first sub-band is set for downlink transmission or the second sub-band is set for uplink transmission on the second time-domain resource. The first time-domain resource and the second time-domain resource may be two adjacent time-domain resources, and the first time-domain resource may be before the second time-domain resource.

[0130] In one example, when the signal transmission direction of the third signal is the same as that of the first signal, the third analog filter may be the same as the first analog filter. Alternatively, the center frequency of the third analog filter may be the same as the center frequency of the first analog filter. Alternatively, the center frequency of the third analog filter is the same as the center frequency of the first analog filter, and the passband bandwidth of the third analog filter is the same as the passband bandwidth of the first analog filter. Alternatively, the method for determining the center frequency and passband bandwidth of the third analog filter is the same as the method for determining the center frequency and passband bandwidth of the first analog filter.

[0131] That the signal transmission direction of the third signal is the same as that of the first signal can be understood as meaning that both the third signal and the first signal are downlink signals, or that both the third signal and the first signal are uplink signals. Specifically, when the first indication information indicates to the terminal to receive the first signal and the third indication information indicates to the terminal to receive the third signal, both the third signal and the first signal are downlink signals. When the first indication information indicates to the terminal to transmit the first signal and the third indication information indicates to the terminal to transmit the third signal, both the third signal and the first signal are uplink signals.

[0132] In another example, the center frequency of the third analog filter may be different from the center frequency of the first analog filter.

[0133] Based on the above solution, when the center frequency of the first analog filter is the same as the center frequency of the third analog filter, the terminal may filter the signals received or transmitted on the first time-domain resource and the second time-domain resource using one analog filter. It is possible to reduce the cost of the terminal and reduce the complexity of the terminal 。Sa Furthermore, when all terminals receive or transmit signals from the first time-domain resource to the second time-domain resource, or from the second time-domain resource to the next time-domain resource, the analog filter of the terminal filters the signals continuously and does not require a switching time. Furthermore, since the signals transmitted or received by the terminal are filtered using one analog filter, the switching time between signal transmission and signal reception is short. Thereby, the data transmission delay can be reduced. Furthermore, existing analog filters can be used. Thereby, the cost of the terminal can be reduced.

[0134] If the center frequency of the first analog filter is the same as the center frequency of the third analog filter, but the passband bandwidth of the first analog filter and the passband bandwidth of the third analog filter do not necessarily have to be the same, then each of the passband bandwidth of the first analog filter and the passband bandwidth of the third analog filter may include frequency domain resources of sub-bands transmitted in the reverse direction as little as possible, so that interference in the reverse transmission can be reduced.

[0135] If the center frequency of the first analog filter is different from the center frequency of the third analog filter and the passband bandwidth of the first analog filter is different from the passband bandwidth of the third analog filter, then interference in the reverse transmission can be further reduced.

[0136] In an embodiment of the present application, the terminal may report the terminal's capability information, such as information about the switching time, to the base station. FIG. 17 is an exemplary flowchart of a method for a terminal to report capability information according to an embodiment of the present application. The following operations may be included.

[0137] S1701: The base station transmits first configuration information to the terminal, and correspondingly, the terminal receives the first configuration information from the base station.

[0138] The first configuration information may indicate N sub-bands in one carrier. N is an integer greater than 1. For a detailed description of the first configuration information, refer to the related description of the first configuration information in S301.

[0139] S1702: The terminal reports first capability information, and correspondingly, the base station receives the first capability information from the terminal.

[0140] The first capability information may include the switching time of the terminal.

[0141] The switching time may be one or more of the following.

[0142] 1. The switching time from uplink transmission to downlink transmission on a time domain resource (e.g., on a first time domain resource or a second time domain resource).

[0143] 2. The switching time from downlink transmission to uplink transmission on a time domain resource.

[0144] 3. The switching time from uplink transmission of one sub-band to uplink transmission of another sub-band on a time domain resource.

[0145] 4. The switching time from downlink transmission of one sub-band to downlink transmission of another sub-band on a time domain resource.

[0146] 5. The switching time from uplink transmission to downlink transmission between different time domain resources (e.g., from a first time domain resource to a second time domain resource).

[0147] 6. The switching time from downlink transmission to uplink transmission between different time domain resources.

[0148] 7. The switching time from downlink transmission to downlink transmission between different time domain resources.

[0149] 8. The switching time from uplink transmission to uplink transmission between different time domain resources.

[0150] For the switching time between different time domain resources, the switching between the same sub-bands and the switching between different sub-bands may be further distinguished. For the uplink / uplink switching or downlink / downlink switching between different time domain resources, there may be a switching time because the filter parameters used in the two time domain resources may be different.

[0151] For example, the value of the switching time may be 0 μs, 20 μs, 35 μs, 140 μs, or 210 μs.

[0152] Since the transmission direction set for the first sub-band on the first time-domain resource and / or the second time-domain resource is different from the transmission direction set for the second sub-band on the first time-domain resource and / or the second time-domain resource, the switching time may be different as an alternative. Various cases are described below.

[0153] First case: The first sub-band is set for uplink transmission on the first time-domain resource, and the second sub-band is set for downlink transmission on the first time-domain resource.

[0154] The switching time may include one or more of the following.

[0155] 1. The switching time of the terminal from signal transmission on the first sub-band on the first time-domain resource to signal reception on the second sub-band.

[0156] 2. The switching time of the terminal from signal reception on the second sub-band on the first time-domain resource to signal transmission on the first sub-band.

[0157] Second case: The first sub-band is set for uplink transmission on the first time-domain resource and the second time-domain resource, the second sub-band is set for downlink transmission on the first time-domain resource, and is set for uplink transmission on the second time-domain resource.

[0158] The switching time may include one or more of the following.

[0159] 1. The switching time of the terminal from signal transmission on the first sub-band on the first time-domain resource to signal reception on the second sub-band on the first time-domain resource.

[0160] 2. The switching time of the terminal from signal reception on the second sub-band on the first time-domain resource to signal transmission on the first sub-band on the first time-domain resource.

[0161] 3. The switching time of the terminal from signal transmission on the first sub-band on the first time domain resource to signal transmission on the first sub-band on the second time domain resource.

[0162] 4. The switching time of the terminal from signal transmission on the first sub-band on the first time domain resource to signal transmission on the second sub-band on the second time domain resource.

[0163] 5. The switching time of the terminal from signal transmission on the first sub-band on the second time domain resource to signal transmission on the second sub-band on the second time domain resource.

[0164] Case 3: The first sub-band is set for uplink transmission on the first time domain resource and for downlink transmission on the second time domain resource, and the second sub-band is set for downlink transmission on both the first time domain resource and the second time domain resource.

[0165] The switching time may include one or more of the following.

[0166] 1. The switching time of the terminal from signal transmission on the first sub-band on the first time domain resource to signal reception on the second sub-band on the first time domain resource.

[0167] 2. The switching time of the terminal from signal reception on the second sub-band on the first time domain resource to signal transmission on the first sub-band on the first time domain resource.

[0168] 3. The switching time of the terminal from signal transmission on the first sub-band on the first time domain resource to signal reception on the second sub-band on the second time domain resource.

[0169] 4. The switching time of the terminal from signal reception on the second sub-band on the first time domain resource to signal reception on the second sub-band on the second time domain resource.

[0170] 5. The switching time of the terminal from receiving a signal on the first sub-band on the second time domain resource to receiving a signal on the second sub-band on the second time domain resource.

[0171] 6. The switching time of the terminal from transmitting a signal on the first sub-band on the first time domain resource to receiving a signal on the first sub-band on the second time domain resource.

[0172] The fourth case: The first sub-band is set for uplink transmission on the first time domain resource and for downlink transmission on the second time domain resource, and the second sub-band is set for downlink transmission on the first time domain resource and for uplink transmission on the second time domain resource.

[0173] The switching time may include one or more of the following.

[0174] 1. The switching time of the terminal from transmitting a signal on the first sub-band on the first time domain resource to receiving a signal on the second sub-band on the first time domain resource.

[0175] 2. The switching time of the terminal from receiving a signal on the second sub-band on the first time domain resource to transmitting a signal on the first sub-band on the first time domain resource.

[0176] 3. The switching time of the terminal from transmitting a signal on the first sub-band on the first time domain resource to receiving a signal on the first sub-band on the second time domain resource.

[0177] 4. The switching time of the terminal from receiving a signal on the second sub-band on the first time domain resource to transmitting a signal on the second sub-band on the second time domain resource.

[0178] 5. The switching time of the terminal from signal transmission on the first sub-band on the first time domain resource to signal transmission on the second sub-band on the second time domain resource.

[0179] 6. The switching time of the terminal from signal reception on the second sub-band on the first time domain resource to signal reception on the first sub-band on the second time domain resource.

[0180] Based on the above solutions, the base station can perform flexible and efficient scheduling based on the switching time reported by the terminal. For example, when the first terminal reports that the switching time from uplink transmission to uplink transmission between different time domain resources is 0, the base station may schedule the uplink frequency domain resources on two consecutive time domain resources for the first terminal. When the first terminal reports that the switching time from uplink transmission to uplink transmission between different time domain resources is 140 μs, in order to avoid wasting resources, the base station may schedule the uplink frequency domain resources on two consecutive time domain resources separately for the first terminal and the second terminal to improve resource utilization.

[0181] To implement the functions of the above embodiments, it can be understood that the base station and the terminal include corresponding hardware structures and / or software modules for executing this function. Those skilled in the art should easily notice that this application can be implemented using hardware or a combination of hardware and computer software in combination with the units and method steps in the examples described in the embodiments disclosed in this application. Whether the function is executed using hardware or using hardware driven by computer software depends on the individual application scenarios and design constraints of the technical solutions.

[0182] Figures 18 to 20 are schematic diagrams of the structure of a possible communication device according to an embodiment of the present application. These communication devices can be configured to implement the functions of the terminal or the base station in the above embodiment. Therefore, it is also possible to realize the advantageous effects of the embodiment of the above method. In the embodiment of the present application, the communication device may be one of the terminals 120a to 120j shown in FIG. 1, or may be the base station 110a or 110b shown in FIG. 1, or may be a module (for example, a chip) applied to the terminal device or the base station.

[0183] As shown in FIG. 18, the communication device 1800 includes a processing module 1810 and a transceiver module 1820. The communication device 1800 is configured to implement the functions of the terminal or the base station in the embodiment of the method shown in FIG. 3, FIG. 9, or FIG. 17.

[0184] When the communication device 1800 is configured to implement the functions of the terminal in the embodiment of the method shown in FIG. 3, the transceiver module 1820 is configured to receive first setting information and first indication information. The processing module 1810 is configured to determine a fourth time-frequency resource based on the first setting information and the first indication information. The transceiver module is further configured to receive or transmit a first signal on the fourth time-frequency resource.

[0185] When the communication device 1800 is configured to implement the functions of the base station in the embodiment of the method shown in FIG. 3, the transceiver module 1820 is configured to transmit first setting information and first indication information. The processing module 1810 is configured to determine a fourth time-frequency resource based on the first setting information and the first indication information. The transceiver module is further configured to receive or transmit a first signal on the fourth time-frequency resource.

[0186] When the communication device 1800 is configured to implement the functions of a terminal in the embodiment of the method shown in FIG. 9, the transceiver module 1820 is configured to receive first indication information. The processing module 1810 is configured to filter a first signal using a first analog filter, and the transceiver module 1820 is further configured to transmit the first signal. Alternatively, the transceiver module 1820 is further configured to receive the first signal, and the processing module 1810 is configured to filter the first signal using a first analog filter.

[0187] When the communication device 1800 is configured to implement the functions of a terminal in the embodiment of the method shown in FIG. 17, the transceiver module 1820 is configured to receive first configuration information. The processing module 1810 is configured to generate first capability information. The transceiver module 1820 is further configured to transmit the first capability information.

[0188] When the communication device 1800 is configured to implement the functions of a base station in the embodiment of the method shown in FIG. 17, the processing module 1810 is configured to generate first indication information. The transceiver module 1820 is configured to transmit the first indication information and receive first capability information.

[0189] For a more detailed description of the processing module 1810 and the transceiver module 1820, please refer to the relevant descriptions in the embodiments of the method shown in FIGS. 3 to 17.

[0190] As shown in FIG. 19, the communication device 1900 includes a processor 1910 and an interface circuit 1920. The processor 1910 and the interface circuit 1920 are coupled to each other. It can be understood that the interface circuit 1920 can be a transceiver or an input / output interface. Optionally, the communication device 1900 may further include a memory 1930 configured to store instructions executed by the processor 1910, or input data required by the processor 1910 to execute instructions, or data generated after the processor 1910 executes instructions.

[0191] When the communication device 1900 is configured to implement the method shown in FIG. 3, FIG. 9, or FIG. 17, the processor 1910 is configured to implement the functions of the processing module 1810, and the interface circuit 1920 is configured to implement the functions of the transceiver module 1820.

[0192] When the communication device is a chip applied to a terminal, the chip in the terminal implements the functions of the terminal in the above method embodiments. The chip in the terminal receives information from another module in the terminal (for example, a radio frequency module or an antenna), where this information is transmitted by the base station to the terminal. Alternatively, the chip in the terminal device transmits information to another module in the terminal (for example, a radio frequency module or an antenna), where this information is transmitted by the terminal to the base station.

[0193] When the communication device is a module used in a base station, the module in this base station implements the functions of the base station in the above-described method embodiments. The module in the base station receives information from another module in the base station (for example, a radio frequency module or an antenna), where this information is transmitted by a terminal to the base station. Alternatively, the module in the base station transmits information to another module in the base station (for example, a radio frequency module or an antenna), where this information is transmitted by the base station to a terminal. The module in the base station may be a baseband chip in the base station, or may be a DU or another module. The DU may be a DU of an open radio access network (O-RAN) architecture.

[0194] FIG. 20 is a schematic diagram of the structure of a terminal according to an embodiment of the present application. The terminal 2000 includes a baseband processing module 2010, a radio frequency processing module 2020, and an antenna 2030. The baseband processing module 2010 is configured to process baseband signals, which may specifically include demodulation and decoding of downlink signals and encoding and modulation of uplink signals. The baseband processing module 2010 may specifically be a baseband chip. The radio frequency processing module 2020 is configured to process radio frequency signals, which may specifically include analog filtering performed on uplink and downlink signals and power amplification performed on uplink and downlink signals. In other words, the radio frequency processing module 2020 includes the analog filter described in the method embodiments above. The radio frequency processing module 2020 may specifically be a radio frequency chip. The antenna 2030 is configured to receive radio waves from space, convert the radio waves into downlink signals, and transmit the downlink signals to the radio frequency processing module 2020, or convert the uplink signals from the radio frequency processing module 2020 into radio waves and transmit the radio waves into space.

[0195] The processor in the embodiments of the present application may be a Central Processing Unit (CPU), or may be another general-purpose processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), another programmable logic device, a transistor logic device, a hardware component, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0196] The method steps in the embodiments of the present application may be implemented in a hardware manner, or may be implemented in a manner of executing software instructions by a processor. The software instructions may include corresponding software modules. The software modules may be stored in a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, a register, a hard disk, a removable hard disk, a CD-ROM, or any other form of storage medium well-known in the art. For example, the storage medium may be coupled to the processor so that the processor can read information from the storage medium or write information to the storage medium. Of course, the storage medium may be a component of the processor. The processor and the storage medium may be located within an ASIC. Furthermore, the ASIC may be located within a base station or a terminal. Of course, the processor and the storage medium may exist as individual components within a base station or a terminal.

[0197] All or part of the above embodiments may be implemented using software, hardware, firmware, or any combination thereof. When software is used to implement an embodiment, all or part of the embodiment may be implemented in the form of a computer program product. A computer program product includes one or more computer programs and instructions. When the computer program or instructions are loaded and executed on a computer, all or part of the procedures or functions of the embodiments of the present application are executed. The computer may be a general-purpose computer, a dedicated computer, a computer network, a network device, a user device, or another programmable device. The computer program or instructions may 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 program or instructions may be transmitted in a wired or wireless manner from a website, computer, server, or data center to another website, computer, server, or data center. The computer-readable storage medium may be any usable medium accessible by a computer, or a data storage device such as a server or data center integrating one or more usable media. The usable medium may be, for example, a magnetic medium such as a floppy disk, hard disk, or magnetic tape, or may be an optical medium such as a digital video disk, or may be a semiconductor medium such as a solid-state disk. The computer-readable storage medium may be a volatile or non-volatile storage medium, or may include two types of storage media, that is, a volatile storage medium and a non-volatile storage medium.

[0198] In various embodiments of the present application, unless otherwise specified or there is no logical contradiction, the terms and / or descriptions in different embodiments are consistent and may be cross-referenced to each other. The technical features of different embodiments may be combined based on their internal logical relationships to form new embodiments.

[0199] In this application, "at least one" means one or more, and "a plurality of" means two or more. In this application, "and / or" is a relationship for describing related objects, indicating that three relationships can exist. For example, A and / or B can indicate that only A exists, both A and B exist, and only B exists. A and B can each be singular or plural. In the description text of this application, the character " / " generally indicates an "or" relationship between related objects. In the formulas of this application, the character " / " indicates a "division" relationship between related objects. "Including at least one of A, B, and C" can indicate including A, including B, including C, including A and B, including A and C, including B and C, and including A, B, and C.

[0200] It can be understood that the various numbers in the embodiments of this application are only used for distinction to facilitate the description and are not used to limit the scope of the embodiments of this application. The serial numbers of the above processes do not mean the execution order. The execution order of the process shall be determined based on the functions and internal logics of the process.

Claims

1. A signal transmission method applied to a terminal, comprising: receiving first indication information from a network device, wherein the first indication information indicates to the terminal to receive a first signal or transmit a first signal on a first time-frequency resource; receiving the first signal and filtering the first signal using a first analog filter, or filtering the first signal using the first analog filter and then transmitting the first signal; a center frequency and / or a passband bandwidth of the first analog filter is determined based on M sub-bands, where M is an integer greater than 1, the M sub-bands include a first sub-band and a second sub-band, the first sub-band is set for uplink transmission on a first time-domain resource, the second sub-band is set for downlink transmission on the first time-domain resource, and the first time-domain resource overlaps with a time-domain resource of the first time-frequency resource; when the first indication information indicates to the terminal to receive the first signal on the first time-frequency resource, the method further includes receiving second indication information from the network device, where the second indication information indicates to the terminal to transmit a second signal on a second time-frequency resource, a time-domain resource of the second time-frequency resource overlaps with the first time-domain resource, and the time-domain resource of the second time-frequency resource does not overlap with the time-domain resource of the first time-frequency resource; A signal transmission method.

2. a bandwidth of the M sub-bands is included in a frequency-domain range of one bandwidth part (BWP), or a bandwidth of the M sub-bands is included in a frequency-domain range of one carrier The method according to claim 1.

3. When the first indication information indicates to the terminal to receive the first signal on the first time-frequency resource, the method includes: Filtering the second signal using a second analog filter, wherein a center frequency of the second analog filter is the same as the center frequency of the first analog filter, and further including the step. The method according to claim 1.

4. The passband bandwidth of the first analog filter is the same as the passband bandwidth of the second analog filter, or The center frequency and the passband bandwidth of the first analog filter are determined based on the M sub-bands, the center frequency of the second analog filter is determined based on the M sub-bands, and the passband bandwidth of the second analog filter is determined based on K of the M sub-bands and the center frequency of the second analog filter, where the K sub-bands are set for uplink transmission on the first time-domain resource, or The passband bandwidth and the center frequency of the second analog filter are determined based on the M sub-bands, the passband bandwidth of the first analog filter is determined based on P of the M sub-bands and the center frequency of the first analog filter, where the P sub-bands are set for downlink transmission on the first time-domain resource, or The center frequency and the passband bandwidth of the second analog filter are determined based on K of the M sub-bands, where the K sub-bands are set for uplink transmission on the first time-domain resource, the center frequency of the first analog filter is determined based on the K sub-bands, and the passband bandwidth of the first analog filter is determined based on the M sub-bands and the center frequency of the first analog filter, or The center frequency and the passband bandwidth of the first analog filter are determined based on P of the M sub-bands, and the P sub-bands are set for downlink transmission on the first time domain resource. The center frequency of the second analog filter is determined based on the P sub-bands, and the passband bandwidth of the second analog filter is determined based on the M sub-bands and the center frequency of the second analog filter, or The center frequency and the passband bandwidth of the second analog filter are determined based on K of the M sub-bands, and the K sub-bands are set for uplink transmission on the first time domain resource. The center frequency of the first analog filter is determined based on the K sub-bands, and the passband bandwidth of the first analog filter is determined based on P sub-bands and the center frequency of the first analog filter. The P sub-bands are set for downlink transmission on the first time domain resource, or The center frequency and the passband bandwidth of the first analog filter are determined based on P of the M sub-bands, and the P sub-bands are set for downlink transmission on the first time domain resource. The center frequency of the second analog filter is determined based on the P sub-bands, and the passband bandwidth of the second analog filter is determined based on K sub-bands and the center frequency of the second analog filter. The K sub-bands are set for uplink transmission on the first time domain resource The method according to claim 3.

5. Receiving, from the network device, third indication information, where the third indication information indicates to the terminal to receive a third signal or transmit a third signal on a third time-frequency resource, and Receiving the third signal and filtering the third signal using a third analog filter, or filtering the third signal using a third analog filter and transmitting the third signal, and further including the step of: The first sub-band is set for downlink transmission on a second time-domain resource, and / or the second sub-band is set for uplink transmission on the second time-domain resource. The second time-domain resource overlaps with the time-domain resource of the third time-frequency resource, and the second time-domain resource does not overlap with the first time-domain resource. The center frequency and / or passband bandwidth of the third analog filter are determined based on at least one of the M sub-bands The method according to claim 4.

6. When the signal transmission direction of the third signal is the same as the signal transmission direction of the first signal, the third analog filter is the same as the first analog filter, or The center frequency of the third analog filter is the same as the center frequency of the first analog filter, or The center frequency of the third analog filter is the same as the center frequency of the first analog filter, and the passband bandwidth of the third analog filter is the same as the passband bandwidth of the first analog filter The method according to claim 5.

7. The first analog filter is symmetric with respect to the center frequency of the first analog filter The method according to claim 5.

8. A communication device comprising means for performing the method according to any one of claims 1 to 7.

9. A communication device including a processor and an interface circuit, wherein the interface circuit is configured to receive a signal from a communication device other than the communication device and transmit the signal to the processor, or to transmit a signal from the processor to a communication device other than the communication device, and the processor is configured to implement the method according to any one of claims 1 to 7 by a logic circuit or by executing code instructions.

10. A computer-readable storage medium storing a computer program or instructions, wherein when the computer program or the instructions are executed by a communication device, the computer program or the instructions cause the device to implement the method according to any one of claims 1 to 7 Computer-readable storage medium.

11. A computer program including computer-executable instructions, wherein when the computer-executable instructions are executed by a communication device, the computer-executable instructions cause the device to execute the method according to any one of claims 1 to 7.

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