Method and apparatus for signal transmission

Abstract

Embodiments of the present application provide a method and apparatus for signal transmission. The method can include: a terminal device receiving a first signal from a network device using a first frequency resource; in response to the first signal, the terminal device transmitting a second signal with the network device using a second frequency resource; the first frequency resource and the second frequency resource are different frequency domain resources in a system bandwidth, and the subcarrier spacing of the first frequency resource and the second frequency resource is different. Through the present application, when the terminal device transmits the first signal and the second signal, different frequency domain resources in the system bandwidth can be used, thereby improving the utilization rate of frequency spectrum resources. In addition, the subcarrier spacing of the first frequency resource and the second frequency resource is different, so that appropriate subcarrier spacing can be selected according to the characteristics of the first signal and the second signal. The method provided in the embodiments can be applied to a communication system, such as 5G or NR, LTE, V2X, D2D, M2M, MTC, Internet of Things, etc.

Description

[0001] This application claims priority to the Chinese Patent Application No. 202111318168.3, filed on November 09, 2021, entitled "A Transmission Method of Wake-up Signal", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the field of communication, and more particularly, to a signal transmission method and apparatus. BACKGROUND

[0003] A terminal device can receive a wake-up signal through a single low-power small circuit, such as a wake-up receiver (WUR), and a main receiver can be in a deep sleep state. When the terminal device detects the wake-up signal through the WUR, the terminal device triggers the wake-up of the main receiver. After the main receiver wakes up, the terminal device can perform data transmission through the main receiver. Currently, there is no solution to disclose the transmission method of the wake-up signal. SUMMARY

[0004] The present application provides a signal transmission method and apparatus, by making the frequency resources used by the terminal device to transmit signals using the WUR different from those used by the main receiver, the utilization rate of the frequency spectrum resources can be improved.

[0005] In a first aspect, a signal transmission method is provided. The method can be executed by a terminal device, or can also be executed by a component (such as a chip or circuit) of the terminal device, and no limitation is made in this regard. For ease of description, the following is described by way of example of being executed by a terminal device.

[0006] The method can include: a terminal device receiving a first signal from a network device using a first frequency resource; based on the first signal, the terminal device transmitting a second signal with the network device using a second frequency resource; wherein the first frequency resource and the second frequency resource are different frequency domain resources in a system bandwidth, and the subcarrier spacing of the first frequency resource is different from the subcarrier spacing of the second frequency resource.

[0007] For example, the subcarrier spacing of the first frequency resource is greater than the subcarrier spacing of the second frequency resource.

[0008] Based on the above technical solution, after the terminal device receives the first signal from the network device using the first frequency resource, the terminal device transmits the second signal to the network device using the second frequency resource in response to the first signal, wherein the first frequency resource and the second frequency resource are different frequency domain resources in the system bandwidth. When the terminal device transmits the first signal and the second signal, different frequency domain resources in the system bandwidth can be used, so as to avoid the waste of frequency spectrum resources caused by allocating the system bandwidth to the first signal or the second signal, and improve the utilization rate of frequency spectrum resources. In addition, the subcarrier spacing of the first frequency resource is different from the subcarrier spacing of the second frequency resource, so that appropriate subcarrier spacing can be selected according to the characteristics of the first signal and the second signal. For example, when the terminal device receives a wake-up signal (an example of the first signal) using the first frequency resource, a larger subcarrier spacing can be used. The larger the subcarrier spacing is, the shorter the symbol time length is, and the higher the transmission rate is.

[0009] In combination with the first aspect, in some implementations of the first aspect, the time for the terminal device to demodulate the first signal using the first frequency resource is related to a preset time length, and the preset time length is different from the length of the cyclic prefix corresponding to the subcarrier spacing of the first frequency resource.

[0010] Based on the above technical solution, the subcarrier spacing can correspond to a cyclic prefix of a certain length. If the subcarrier spacing of the first frequency resource is large, the length of the cyclic prefix corresponding to the large subcarrier spacing is small. The cyclic prefix with a small length may not be able to resist the inter-symbol interference caused by the multipath time delay of the channel. Therefore, by using the preset time length proposed in the embodiment of the present application, the influence of the multipath time delay that the terminal device may face if the subcarrier spacing of the first frequency resource is large can be solved.

[0011] In combination with the first aspect, in some implementations of the first aspect, the terminal device receives the first signal from the network device using the first frequency resource, including: starting from the starting time of each received symbol, after a preset time length, the terminal device demodulates the first signal from the network device using the first frequency resource.

[0012] In combination with the first aspect, in some implementations of the first aspect, the preset time length is associated with any one of the following information: the frequency domain position of the first frequency resource, the subcarrier spacing of the first frequency resource, or the length of the cyclic prefix adopted by the bandwidth part (BWP) of the terminal device; or the method further includes: the terminal device receives the preset time length from the network device.

[0013] Based on the above technical solution, the preset time length can be associated with the frequency domain position of the first frequency resource, so that the preset time length can be obtained through the frequency domain position of the first frequency resource; or the preset time length can be associated with the subcarrier spacing of the first frequency resource, so that the preset time length can be obtained through the subcarrier spacing of the first frequency resource; or the preset time length can be associated with the length of the cyclic prefix adopted by the bandwidth part (BWP) of the terminal device, so that the preset time length can be obtained through the length of the cyclic prefix adopted by the BWP of the terminal device; or the terminal device can also receive the preset time length from the network side.

[0014] In combination with the first aspect, in some implementations of the first aspect, the terminal device receives the first signal from the network device using the first frequency resource, including: the terminal device receives the first signal from the network device using the subcarriers in the first frequency resource except for N1 subcarriers, the N1 subcarriers representing one or more subcarriers adjacent to the second frequency resource in the first frequency resource, and N1 being an integer greater than 1 or equal to 1.

[0015] As an example, the N1 subcarriers can include one or more subcarriers with the highest number (or index, or serial number) in the bandwidth of the first frequency resource, and / or one or more subcarriers with the lowest number.

[0016] Based on the above technical solution, by setting the guard subcarriers (i.e., N1 subcarriers) on one side or both sides of the bandwidth allocated to the first frequency resource, no first signal is transmitted on the guard subcarriers, so that even if the subcarrier spacing of the first frequency resource is different from the subcarrier spacing of the second frequency resource, because of the guard subcarriers, the subcarrier interference between the first signal transmitted using the first frequency resource and the second signal transmitted using the second frequency resource will still be greatly reduced.

[0017] In combination with the first aspect, in some implementations of the first aspect, the terminal device transmits the second signal to the network device using the second frequency resource, including: the terminal device transmits the second signal to the network device using the subcarriers in the second frequency resource except for N2 subcarriers, the N2 subcarriers representing one or more subcarriers adjacent to the first frequency resource in the second frequency resource, and N2 being an integer greater than 1 or equal to 1.

[0018] Based on the above technical solution, by setting the guard subcarriers (i.e., N2 subcarriers) on one side or both sides of the bandwidth allocated to the second frequency resource, no second signal is transmitted on the guard subcarriers, so that even if the subcarrier spacing of the first frequency resource is different from the subcarrier spacing of the second frequency resource, because of the guard subcarriers, the subcarrier interference between the first signal transmitted using the first frequency resource and the second signal transmitted using the second frequency resource will still be greatly reduced.

[0019] With reference to the first aspect, in some implementations of the first aspect, the frequency domain position of the first frequency resource is discontinuous.

[0020] Based on the above technical solution, the frequency domain position of the first frequency resource is discontinuous, so that frequency diversity gain can be obtained by frequency hopping, and better transmission effect can be obtained.

[0021] With reference to the first aspect, in some implementations of the first aspect, the frequency domain position of the first frequency resource includes a first frequency domain position and a second frequency domain position, and the receiving, by the terminal device, the first signal from the network device using the first frequency resource includes: receiving, by the terminal device, a part of the first signal from the network device at the first frequency domain position, and receiving, by the terminal device, the remaining part of the first signal from the network device at the second frequency domain position; or, at a first time, receiving, by the terminal device, the first signal from the network device at the first frequency domain position, and at a second time, receiving, by the terminal device, the first signal from the network device at the second frequency domain position.

[0022] With reference to the first aspect, in some implementations of the first aspect, the method further includes: receiving, by the terminal device, configuration information of the first frequency resource using the second frequency resource.

[0023] With reference to the first aspect, in some implementations of the first aspect, the configuration information of the first frequency resource includes one or more of the following information: a bandwidth of the first frequency resource, a frequency domain position of the first frequency resource, and a subcarrier spacing of the first frequency resource.

[0024] With reference to the first aspect, in some implementations of the first aspect, the first signal is a signal obtained by multiplying a time domain signal by a window function.

[0025] For example, the window function refers to a function with smaller values at both ends and larger values in the middle.

[0026] Based on the above technical solution, the first signal is a signal obtained by multiplying a time domain signal by a window function, so that the subcarrier interference between the first signal and the second signal can be reduced by time domain windowing.

[0027] The second aspect provides a signal transmission method, which can be executed by a terminal device or a component (such as a chip or a circuit) of the terminal device, and the execution is not limited. For ease of description, the execution by the terminal device is taken as an example for description.

[0028] The terminal device comprises a first module and a second module, and the method can comprise: the terminal device receiving a first signal from the network device through the first module using a first frequency resource; based on the first signal, the terminal device transmits a second signal to the network device through the second module using a second frequency resource; wherein the first frequency resource and the second frequency resource are different frequency domain resources in a system bandwidth, and a subcarrier spacing of the first frequency resource is different from a subcarrier spacing of the second frequency resource.

[0029] Based on the above technical solution, after the terminal device receives the first signal from the network device through the first module, the terminal device transmits the second signal to the network device through the second module in response to the first signal, wherein the first frequency resource used when receiving the first signal through the first module and the second frequency resource used when transmitting the second signal through the second module are different frequency domain resources in a system bandwidth. When the terminal device transmits signals through different modules, different frequency domain resources in the system bandwidth can be used, so that the waste of frequency spectrum resources caused by allocating the system bandwidth to the first module or the second module can be avoided, and the utilization rate of frequency spectrum resources can be improved. In addition, the subcarrier spacing of the first frequency resource is different from the subcarrier spacing of the second frequency resource, so that appropriate subcarrier spacing can be selected according to the characteristics of the first signal and the second signal. For example, when the terminal device receives a wake-up signal (an example of the first signal) through the first module, a larger subcarrier spacing can be used. The larger the subcarrier spacing is, the shorter the symbol length is, and thus the higher the transmission rate is.

[0030] In combination with the second aspect, in some implementations of the second aspect, the time for the terminal device to demodulate the first signal through the first module using the first frequency resource is related to a preset time length, and the preset time length is different from the length of the cyclic prefix corresponding to the subcarrier spacing of the first frequency resource.

[0031] In combination with the second aspect, in some implementations of the second aspect, the terminal device receives the first signal from the network device through the first module using the first frequency resource, comprising: starting from the beginning of each received symbol, after a preset time length, the terminal device demodulates the first signal from the network device through the first module using the first frequency resource.

[0032] In combination with the second aspect, in some implementations of the second aspect, the preset time length is associated with any of the following information: a frequency domain position of the first frequency resource, a subcarrier spacing of the first frequency resource, or a length of a cyclic prefix adopted by a bandwidth part (BWP) of the terminal device; or the method further comprises: the terminal device receiving the preset time length from the network device.

[0033] In some implementations of the second aspect, in conjunction with the second aspect, the terminal device receives, using the first frequency resource, the first signal from the network device via the first module, including: the terminal device receives, using subcarriers of the first frequency resource other than N1 subcarriers, the first signal from the network device via the first module, the N1 subcarriers representing one or more subcarriers of the first frequency resource adjacent to the second frequency resource, N1 being an integer greater than 1 or equal to 1.

[0034] In some implementations of the second aspect, in conjunction with the second aspect, the terminal device transmits, using the second frequency resource, the second signal to the network device via the second module, including: the terminal device transmits, using subcarriers of the second frequency resource other than N2 subcarriers, the second signal to the network device via the second module, the N2 subcarriers representing one or more subcarriers of the second frequency resource adjacent to the first frequency resource, N2 being an integer greater than 1 or equal to 1.

[0035] In some implementations of the second aspect, in conjunction with the second aspect, the frequency domain location of the first frequency resource is discontinuous.

[0036] In some implementations of the second aspect, in conjunction with the second aspect, the frequency domain location of the first frequency resource includes a first frequency domain location and a second frequency domain location, and the terminal device receives, using the first frequency resource, the first signal from the network device via the first module, including: the terminal device receives, using the first frequency resource, a part of the first signal from the network device via the first module at the first frequency domain location, and receives a remaining part of the first signal from the network device via the first module at the second frequency domain location; or, at a first time, the terminal device receives, using the first frequency resource, the first signal from the network device via the first module at the first frequency domain location, and at a second time, the terminal device receives, using the first frequency resource, the first signal from the network device via the first module at the second frequency domain location.

[0037] In some implementations of the second aspect, in conjunction with the second aspect, the method further includes: the terminal device receives, using the second frequency resource, configuration information of the first frequency resource via the second module.

[0038] In some implementations of the second aspect, in conjunction with the second aspect, the configuration information of the first frequency resource includes one or more of the following information: a bandwidth of the first frequency resource, a frequency domain location of the first frequency resource, a subcarrier spacing of the first frequency resource.

[0039] In some implementations of the second aspect, in conjunction with the second aspect, the first signal is a signal obtained by multiplying a time domain signal by a window function.

[0040] The second aspect and each possible design have the beneficial effects as described in relation to the first aspect, which will not be repeated here.

[0041] In a third aspect, a method for signal transmission is provided. The method can be performed by a network device or a component (e.g., a chip or a circuit) of the network device. For ease of description, the method performed by the network device is described below.

[0042] The method can include: transmitting, by the network device, a first signal to a first terminal device using a first frequency resource; and transmitting, by the network device, a second signal to the first terminal device using a second frequency resource based on the first signal, wherein the first frequency resource and the second frequency resource are different frequency domain resources in a system bandwidth, and a subcarrier spacing of the first frequency resource is different from a subcarrier spacing of the second frequency resource.

[0043] According to the above technical solution, after the network device transmits the first signal to the first terminal device using the first frequency resource, the network device transmits the second signal to the terminal device using the second frequency resource in response to the first signal, wherein the first frequency resource and the second frequency resource are different frequency domain resources in the system bandwidth. The network device transmits the first signal and the second signal using different frequency domain resources in the system bandwidth, thereby avoiding the waste of frequency spectrum resources caused by allocating the system bandwidth to the first signal or the second signal, and improving the utilization rate of frequency spectrum resources. In addition, the subcarrier spacing of the first frequency resource is different from the subcarrier spacing of the second frequency resource, which allows the selection of appropriate subcarrier spacing according to the characteristics of the first signal and the second signal. For example, when the network device receives a wake-up signal (an example of the first signal) using the first frequency resource, a larger subcarrier spacing can be used. The larger the subcarrier spacing, the shorter the symbol length, and the higher the transmission rate.

[0044] In combination with the third aspect, in some implementations of the third aspect, the method further includes: while the network device transmits the first signal to the first terminal device using the first frequency resource, the network device transmits a signal to a second terminal device using the second frequency resource.

[0045] In combination with the third aspect, in some implementations of the third aspect, the method further includes: transmitting, by the network device, a preset time duration to the first terminal device; or the preset time duration is associated with any of the following information: a frequency domain location of the first frequency resource, a subcarrier spacing of the first frequency resource, or a length of a cyclic prefix used by a bandwidth part (BWP) of the terminal device; wherein the preset time duration is used by the first terminal device to determine a time for demodulating the first signal, and the preset time duration is different from a length of a cyclic prefix corresponding to the subcarrier spacing of the first frequency resource.

[0046] In some implementations of the third aspect, the network device uses the first frequency resource to transmit the first signal to the first terminal device, including: the network device uses subcarriers of the first frequency resource except for N1 subcarriers to transmit the first signal to the first terminal device, the N1 subcarriers represent one or more subcarriers of the first frequency resource adjacent to the second frequency resource, and N1 is an integer greater than 1 or equal to 1.

[0047] In some implementations of the third aspect, the network device uses the second frequency resource to transmit the second signal to the first terminal device, including: the network device uses subcarriers of the second frequency resource except for N2 subcarriers to transmit the second signal to the first terminal device, the N2 subcarriers represent one or more subcarriers of the second frequency resource adjacent to the first frequency resource, and N2 is an integer greater than 1 or equal to 1.

[0048] In some implementations of the third aspect, the first signal is a signal obtained by multiplying a time domain signal by a window function.

[0049] In some implementations of the third aspect, the frequency domain position of the first frequency resource is discontinuous.

[0050] In some implementations of the third aspect, the frequency domain position of the first frequency resource includes a first frequency domain position and a second frequency domain position, and the network device uses the first frequency resource to transmit the first signal to the first terminal device, including: the network device transmits part of the first signal to the first terminal device at the first frequency domain position, and transmits the remaining part of the first signal to the first terminal device at the second frequency domain position; or, at a first time, the network device transmits the first signal to the first terminal device at the first frequency domain position, and at a second time, the network device transmits the first signal to the first terminal device at the second frequency domain position.

[0051] In some implementations of the third aspect, the method further includes: the network device uses the second frequency resource to transmit configuration information of the first frequency resource to the first terminal device.

[0052] In some implementations of the third aspect, the configuration information of the first frequency resource includes one or more of the following information: a bandwidth of the first frequency resource, a frequency domain position of the first frequency resource, and a subcarrier spacing of the first frequency resource.

[0053] The beneficial effects of the third aspect and the various possible designs can refer to the descriptions related to the first aspect, which will not be repeated here.

[0054] In a fourth aspect, a method for signal transmission is provided. The method can be performed by a network device or a component (e.g., a chip or a circuit) of the network device. For ease of description, the method performed by the network device is described below.

[0055] The network device includes a first module and a second module. The method can include: the network device sending, using a first frequency resource, a first signal to a first terminal device via the first module; and the network device transmitting, using a second frequency resource, a second signal to the first terminal device via the second module based on the first signal. The first frequency resource and the second frequency resource are different frequency domain resources in a system bandwidth, and a subcarrier spacing of the first frequency resource is different from a subcarrier spacing of the second frequency resource.

[0056] According to the above technical solution, after the network device sends the first signal to the first terminal device via the first module, the network device transmits the second signal to the terminal device via the second module in response to the first signal. The first frequency resource used when the first signal is sent via the first module is different from the second frequency resource used when the second signal is transmitted via the second module. The network device can use different frequency domain resources in the system bandwidth when transmitting signals via different modules, thereby avoiding the waste of frequency spectrum resources caused by allocating the entire system bandwidth to the first module or the second module, and improving the utilization rate of frequency spectrum resources. In addition, the subcarrier spacing of the first frequency resource is different from the subcarrier spacing of the second frequency resource, which allows the appropriate subcarrier spacing to be selected according to the characteristics of the first signal and the second signal. For example, when the network device sends a wake-up signal (an example of the first signal) via the first module, a larger subcarrier spacing can be used. The larger the subcarrier spacing, the shorter the symbol length, and the higher the transmission rate.

[0057] In combination with the fourth aspect, in some implementations of the fourth aspect, the method further includes: when the network device sends the first signal to the first terminal device via the first module using the first frequency resource, the network device transmits a signal to a second terminal device via the second module using the second frequency resource.

[0058] In combination with the fourth aspect, in some implementations of the fourth aspect, the method further includes: the network device sending a preset time duration to the first terminal device; or the preset time duration is associated with any of the following information: a frequency domain location of the first frequency resource, a subcarrier spacing of the first frequency resource, or a length of a cyclic prefix used by a bandwidth part (BWP) of the terminal device; wherein the preset time duration is used by the first terminal device to determine a time for demodulating the first signal, and the preset time duration is different from a length of a cyclic prefix corresponding to the subcarrier spacing of the first frequency resource.

[0059] In some implementations of the fourth aspect, in conjunction with the fourth aspect, the network device uses the first frequency resource to send, by the first module, the first signal to the first terminal device, including: the network device uses subcarriers of the first frequency resource except for N1 subcarriers to send, by the first module, the first signal to the first terminal device, the N1 subcarriers representing one or more subcarriers of the first frequency resource adjacent to the second frequency resource, N1 being an integer greater than 1 or equal to 1.

[0060] In some implementations of the fourth aspect, in conjunction with the fourth aspect, the network device uses the second frequency resource to transmit, by the second module, the second signal to the first terminal device, including: the network device uses subcarriers of the second frequency resource except for N2 subcarriers to transmit, by the second module, the second signal to the first terminal device, the N2 subcarriers representing one or more subcarriers of the second frequency resource adjacent to the first frequency resource, N2 being an integer greater than 1 or equal to 1.

[0061] In some implementations of the fourth aspect, in conjunction with the fourth aspect, the first signal is a signal obtained by multiplying a time-domain signal by a window function.

[0062] In some implementations of the fourth aspect, in conjunction with the fourth aspect, a frequency domain position of the first frequency resource is discontinuous.

[0063] In some implementations of the fourth aspect, in conjunction with the fourth aspect, a frequency domain position of the first frequency resource includes a first frequency domain position and a second frequency domain position, and the network device uses the first frequency resource to send, by the first module, the first signal to the first terminal device, including: the network device sends, by the first module, a part of the first signal to the first terminal device at the first frequency domain position, and sends, by the first module, a remaining part of the first signal to the first terminal device at the second frequency domain position; or, at a first time, the network device sends, by the first module, the first signal to the first terminal device at the first frequency domain position, and at a second time, the network device sends, by the first module, the first signal to the first terminal device at the second frequency domain position.

[0064] In some implementations of the fourth aspect, in conjunction with the fourth aspect, the method further includes: the network device uses the second frequency resource to send, by the second module, configuration information of the first frequency resource to the first terminal device.

[0065] In some implementations of the fourth aspect, in conjunction with the fourth aspect, the configuration information of the first frequency resource includes one or more of the following information: a bandwidth of the first frequency resource, a frequency domain position of the first frequency resource, and a subcarrier spacing of the first frequency resource.

[0066] The beneficial effects of the fourth aspect and each possible design can refer to the description related to the first aspect, which will not be repeated here.

[0067] In a fifth aspect, a device for communication is provided, which is configured to perform the method in any possible implementation of the first aspect to the fourth aspect. Specifically, the device can include units and / or modules configured to perform the method in any possible implementation of the first aspect to the fourth aspect, such as a processing unit and / or a communication unit.

[0068] In an implementation, the device is a communication device, such as a terminal device, or a network device. When the device is a communication device, the communication unit can be a transceiver, or an input / output interface; and the processing unit can be at least one processor. Optionally, the transceiver can be a transceiver circuit. Optionally, the input / output interface can be an input / output circuit.

[0069] In another implementation, the device is a chip, chip system or circuit for a communication device, such as a terminal device, or a network device. When the device is a chip, chip system or circuit for a communication device, the communication unit can be an input / output interface, interface circuit, output circuit, input circuit, pin or related circuitry, etc. on the chip, chip system or circuit; and the processing unit can be at least one processor, processing circuit or logic circuit, etc.

[0070] In a sixth aspect, a device for communication is provided, which includes at least one processor configured to execute computer programs or instructions stored in a memory to perform the method in any possible implementation of the first aspect to the fourth aspect. Optionally, the device further includes the memory configured to store the computer programs or instructions. Optionally, the device further includes a communication interface through which the processor reads the computer programs or instructions stored in the memory.

[0071] In an implementation, the device is a communication device, such as a terminal device, or a network device.

[0072] In another implementation, the device is a chip, chip system or circuit for a communication device, such as a terminal device, or a network device.

[0073] In a seventh aspect, a processor is provided, which is configured to perform the method in the first aspect to the fourth aspect.

[0074] For the sending and obtaining / receiving operations involved in the processor, if there is no special description, or if it does not contradict the actual role or inherent logic in the related description, it can be understood as the processor output and receive, input, etc. operations, and also can be understood as the sending and receiving operations performed by the radio frequency circuit and the antenna, which are not limited in the present application.

[0075] In an eighth aspect, a computer readable storage medium storing program code for execution by an apparatus is provided. The program code includes instructions for performing any of the methods of the first through fourth aspects.

[0076] In a ninth aspect, a computer program product containing instructions that, when executed on a computer, cause the computer to perform any of the methods of the first through fourth aspects is provided.

[0077] In a tenth aspect, a communication system is provided, including the terminal device and the network device described above. BRIEF DESCRIPTION OF DRAWINGS

[0078] FIG. 1 is a schematic diagram of a wireless communication system 100 suitable for embodiments of the present application.

[0079] FIG. 2 is a schematic diagram of a main circuit and a wake-up circuit.

[0080] FIG. 3 is a schematic diagram of a waveform when a signal is modulated using OOK.

[0081] FIG. 4 is a schematic diagram of transmitting and receiving a signal using OFDM modulation technology.

[0082] FIG. 5 is a schematic diagram of the frequency spectrum resource division of OFDM modulation.

[0083] FIG. 6 is a schematic diagram of the time domain and frequency domain resources of OFDM corresponding to different subcarrier spacings.

[0084] FIG. 7 is a schematic diagram of generating an OOK signal based on an OFDM transmitter.

[0085] FIG. 8 is a schematic diagram of transmitting a first signal and a second signal in a time-division manner.

[0086] FIG. 9 is a schematic diagram of a signal processing method 900 provided by embodiments of the present application.

[0087] FIG. 10 is a schematic diagram of transmitting a signal on a first link and a second link according to embodiments of the present application.

[0088] FIG. 11 is a schematic diagram of a first link and a second link using different subcarrier spacings according to embodiments of the present application.

[0089] FIG. 12is an illustration of the multipath delay and the ISI length.

[0090] FIG. 13 is an illustration of the absence of interference and the presence of interference between subcarriers.

[0091] FIG. 14 is an illustration of using guard subcarriers to reduce inter-subcarrier interference according to an embodiment of the present application.

[0092] FIG. 15 is another illustration of using guard subcarriers to reduce inter-subcarrier interference according to an embodiment of the present application.

[0093] FIG. 16 is an illustration of a raised cosine window function according to an embodiment of the present application.

[0094] FIG. 17 is an illustration of a channel frequency domain response.

[0095] FIG. 18 is an illustration of the frequency domain location of the first frequency resource according to an embodiment of the present application.

[0096] FIG. 19 is a schematic flowchart of transmitting the first signal at discontinuous frequency domain locations according to an embodiment of the present application.

[0097] FIG. 20 is a schematic block diagram of a communication apparatus according to an embodiment of the present application.

[0098] FIG. 21 is a schematic block diagram of another communication apparatus according to an embodiment of the present application.

[0099] FIG. 22 is a schematic block diagram of yet another communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0100] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0101] The technical solutions provided in the present application can be applied to various communication systems, for example, a 5th generation (5G) or new radio (NR) system, a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, and the like. The technical solutions provided in the present application can also be applied to future communication systems, such as a 6th generation (6G) mobile communication system. The technical solutions provided in the present application can also be applied to device to device (D2D) communication, vehicle-to-everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and an internet of things (IoT) communication system or other communication systems.

[0102] The terminal device in the embodiments of the present application can also be referred to as a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user apparatus.

[0103] The terminal device can be a device providing voice / data to a user, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminals are: mobile phone, tablet computer, notebook computer, palm computer, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented reality (AR) device, wireless terminal in industrial control, wireless terminal in self driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication function, computing device or other processing device connected to a wireless modem, wearable device, terminal device in a 5G network, or terminal device in a future evolved public land mobile network (PLMN), etc. The embodiments of the present application are not limited thereto.

[0104] By way of example and not limitation, in the embodiments of the present application, the terminal device can also be a wearable device. The wearable device can also be referred to as a wearable smart device, which is a general term for devices that are designed and developed by applying wearable technology to daily wear, such as glasses, gloves, watches, clothing, and shoes. The wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. The wearable device is not only a hardware device, but also a device that realizes powerful functions through software support and data interaction and cloud interaction. The general wearable smart device includes a device with full functions and large size, which can realize complete or partial functions without relying on a smart phone, such as a smart watch or smart glasses, and a device that focuses on a certain application function and needs to cooperate with other devices such as a smart phone, such as various smart wristbands and smart jewelry for monitoring vital signs.

[0105] In the embodiments of this application, the apparatus for implementing the functions of the terminal device can be a terminal device, or an apparatus capable of supporting the terminal device to implement the functions, such as a chip system or a chip, which can be installed in the terminal device. In the embodiments of this application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0106] The network device in the embodiments of this application can be a device for communicating with the terminal device, which can also be referred to as an access network device or a radio access network device, such as a network device, which can be a base station. The network device in the embodiments of this application can refer to a radio access network (RAN) node (or device) for accessing the terminal device to a wireless network. The base station can broadly cover various names in the following or be replaced by the following names, such as: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), primary station, secondary station, motor slide retainer (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station can also refer to a communication module, modem or chip for being arranged in the foregoing devices or apparatuses. The base station can also be a mobile switching center and a device assuming the function of a base station in D2D, V2X, M2M communication, a network side device in a 6G network, a device assuming the function of a base station in a future communication system, etc. The base station can support networks of the same or different access technologies. The embodiments of this application do not limit the specific technologies and specific device forms adopted by the network device.

[0107] A base station can be fixed or mobile. For example, a helicopter or an unmanned aerial vehicle (UAV) can be configured to function as a mobile base station, and one or more cells can move according to the location of the mobile base station. In other examples, a helicopter or an unmanned aerial vehicle can be configured to function as a device that communicates with another base station.

[0108] In some deployments, the network device mentioned in the embodiments of the present application can be a device including a CU, or a DU, or a device including a CU and a DU, or a device including a control plane CU node (central unit-control plane, CU-CP) and a user plane CU node (central unit-user plane, CU-UP), and a DU node.

[0109] The network device and the terminal device can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; can also be deployed on water; and can also be deployed on aircraft, balloons, and satellites in the air. The scenarios in which the network device and the terminal device are located are not limited in the embodiments of the present application.

[0110] First, the network architecture applicable to the present application is briefly introduced as follows. FIG. 1 The network architecture applicable to the present application is briefly introduced as follows.

[0111] FIG. 1 is a schematic diagram of a wireless communication system 100 applicable to the embodiments of the present application. As shown in FIG. 1 , the wireless communication system 100 can include at least one network device, for example, a network device 110 as shown in FIG. 1 , and the wireless communication system 100 can also include at least one terminal device, for example, a terminal device 120 as shown in FIG. 1 . The network device and the terminal device can each be configured with multiple antennas, and the network device and the terminal device can communicate using multi-antenna technology.

[0112] When the network device and the terminal device communicate, the network device can manage one or more cells, and there can be an integer number of terminal devices in a cell. Alternatively, the network device 110 and the terminal device 120 form a single-cell communication system, without loss of generality, the cell is denoted as cell #1. The network device 110 can be a network device in the cell #1, or the network device 110 can serve a terminal device (for example, the terminal device 120) in the cell #1.

[0113] It should be noted that a cell can be understood as an area within the coverage range of the wireless signal of the network device.

[0114] It should be understood that FIG. 1The wireless communication system 100 can also include other network devices or other terminal devices, which are not shown in the simplified schematic diagram for ease of understanding, FIG. 1 Embodiments of the present application can be applied to any communication scenario where a terminal device and a network device communicate.

[0115] For ease of understanding the embodiments of the present application, the terms involved in the present application are briefly described.

[0116] 1. Main circuit and wake-up circuit

[0117] In a wireless communication system, power saving of a terminal device is one of the important goals pursued. For example, the endurance time of some forms of terminal devices (such as mobile phones, wearable devices) affects the user experience; some forms of terminal devices (such as wireless industrial sensors) are designed to work for a longer period of time without replacing the battery because of the difficulty in replacing the battery. Therefore, power saving of a terminal device is an aspect that needs to be considered in wireless communication technology.

[0118] To achieve power saving of a terminal device, in a wireless communication system, the terminal device is usually made to work in different modes under different service requirements. For example, when the terminal device needs to transmit data, it works in a connected state (or connected mode), and data is transmitted between the terminal device and the network device at this time. When the terminal device works in the connected state, the power consumption is high. For another example, when the terminal device has no need to transmit data, it works in an idle state, and the circuit enters a sleep state at this time. For example, the terminal device can periodically detect whether there is data sent to itself, and if there is data, it enters the connected state, otherwise it remains in the idle state and continues to sleep. When the terminal device works in the idle state, the power consumption is low.

[0119] In order to enable the terminal device to reduce power consumption as much as possible in the idle state, the terminal device can include a main circuit and a wake-up circuit.

[0120] 1) Wake-up circuit: or wake-up receiver (WUR) or wake-up module, which can be understood as a circuit used by the terminal device in the idle state, or can be understood as a separate low-power small circuit. The low-power small circuit can be implemented using a simple structure of a separate small circuit or chip, and its power consumption is low. The signal received by the terminal device using the wake-up circuit can be referred to as a wake-up signal (WUS / WUR). It can be understood that the wake-up circuit is only named for distinction, and its specific name does not limit the protection scope of the present application, for example, without loss of generality, the wake-up circuit can also be described as a first circuit (or a first module). Hereinafter, it is uniformly described as a wake-up circuit.

[0121] The signal received by the terminal device using the wake-up circuit can be referred to as being transmitted on a wake-up link, where the wake-up link represents a connection relationship between the terminal device and the network device and is a logical concept rather than a physical entity. It can be understood that the wake-up link is merely named for distinction, and the specific naming thereof does not limit the protection scope of the present application. For example, without loss of generality, the wake-up link can also be described as a first link. It should also be understood that the wake-up signal is merely an example of naming, and the present application is not limited in terms of naming thereof.

[0122] 2) main circuit: or main receiver or main module, which can be understood as a circuit used by the terminal device when normally transmitting data, or a circuit used by the terminal device when transmitting data in a connected state. When the terminal device transmits data using the main circuit, the power consumption is large. It can be understood that the main circuit is merely named for distinction, and the specific naming thereof does not limit the protection scope of the present application. For example, without loss of generality, the main circuit can also be described as a second circuit (or a second module). Hereinafter, it is uniformly described as a main circuit.

[0123] The signal received by the terminal device using the main circuit can be referred to as being transmitted on a main link, where the main link represents a connection relationship between the terminal device and the network device and is a logical concept rather than a physical entity. It can be understood that the main link is merely named for distinction, and the specific naming thereof does not limit the protection scope of the present application. For example, without loss of generality, the main link can also be described as a second link.

[0124] Hereinafter, for distinction and without loss of generality, the signal transmitted by the terminal device using the wake-up circuit is referred to as a first signal, and the signal transmitted by the terminal device using the main circuit is referred to as a second signal.

[0125] As an example, FIG. 2 is a schematic diagram of the main circuit and the wake-up circuit.

[0126] As shown in FIG. 2 , the terminal device can receive (or detect) the first signal through the wake-up circuit, and the terminal device can receive the second signal through the main circuit. It is assumed that the terminal device receives the first signal through the wake-up circuit. If the terminal device does not detect the first signal, the terminal device continues to receive the first signal using the wake-up circuit, and the main circuit can be in a closed state (or a sleep state); if the terminal device detects the first signal, the main circuit is woken up, i.e., the main circuit is in / switched to an open state (or referred to as a working state, or referred to as an active state). After the main circuit is opened, the terminal device can transmit the second signal through the main circuit.

[0127] 2, first frequency resource and second frequency resource

[0128] The following section uses terminal devices as an example to introduce the first and second frequency resources in several scenarios.

[0129] As a first possible scenario, the terminal device includes a first module and a second module. For example, the power consumption of the first module may be less than that of the second module. The first module, for example, could be... FIG. 2 The wake-up circuit in the middle, or it can be the receiving module of the wake-up circuit; the second module, for example, can be FIG. 2 The first module can be the main circuit, or it can be the receiving module of the main circuit. In this application, the first module can be replaced by a wake-up circuit (or the first circuit), and the second module can be replaced by the main circuit (or the second circuit). For consistency, the following description will use the first module and the second module.

[0130] In this case, the first frequency resource can represent the frequency resource used by the terminal device to transmit signals through the first module, and the second frequency resource can represent the frequency resource used by the terminal device to transmit signals through the second module.

[0131] As a second possibility, the terminal device can operate on the first link (or the terminal device can transmit signals on the first link) or on the second link (or the terminal device can transmit signals on the second link). That is, the terminal device and the network device can communicate via either the first link or the second link. For example, as mentioned above, the first link can represent the terminal device communicating via, for instance, the second link. FIG. 2 The link used by the wake-up circuit in the middle to transmit signals, the second link can represent the terminal device through, such as FIG. 2 The link used when transmitting signals in the main circuit.

[0132] In this case, the first frequency resource can represent the frequency resource used by the terminal device to transmit signals on the first link, and the second frequency resource can represent the frequency resource used by the terminal device to transmit signals on the second link.

[0133] As a third possible scenario, the terminal device can be in a first state (e.g., in a WUR state) and a second state. The first state and the second state are used to describe different states (e.g., different radio resource control (RRC) states) of the terminal device. For example, the power consumption of the terminal device in the first state can be less than the power consumption of the terminal device in the second state. The first state may, for example, be an idle state or an inactive state, or may be a WUR state; the second state may, for example, be a connected state, or may be an idle state or an inactive state. The first state (e.g., the WUR state) can correspond to the terminal device operating on the first link or the terminal device using the first module to transmit a signal.

[0134] In this scenario, the first frequency resource can represent a frequency resource used by the terminal device to transmit a signal when in the first state, and the second frequency resource can represent a frequency resource used by the terminal device to transmit a signal when in the second state.

[0135] As a fourth possible scenario, the terminal device can be in a first mode (e.g., in a WUR mode) and a second mode. The first mode and the second mode are used to describe different modes of the terminal device for transmitting a signal. For example, the power consumption of the terminal device in the first mode for transmitting a signal can be less than the power consumption of the terminal device in the second mode for transmitting a signal. The first mode (e.g., the WUR mode) can correspond to the terminal device operating on the first link or the terminal device using the first module to transmit a signal.

[0136] In this scenario, the first frequency resource can represent a frequency resource used by the terminal device to transmit a signal when in the first mode, and the second frequency resource can represent a frequency resource used by the terminal device to transmit a signal when in the second mode.

[0137] Based on the above description, transmitting a signal using the first frequency resource can be replaced by any of the following: transmitting a signal using the first module, transmitting a signal on the first link, transmitting a signal in the first state, transmitting a signal in the first mode; and transmitting a signal using the second frequency resource can be replaced by any of the following: transmitting a signal using the second module, transmitting a signal on the second link, transmitting a signal in the second state, transmitting a signal in the second mode. Hereinafter, for the sake of unity, the first frequency resource and the second frequency resource will be mainly exemplarily described.

[0138] It can be understood that the above mainly takes the terminal device as an example to introduce the first frequency resource and the second frequency resource, and it can be understood that the above description is also applicable to other communication devices (e.g., network devices). For the sake of brevity, the above description will not be repeated here.

[0139] 3、first signal and second signal

[0140] As described above, the signal transmitted using the wake-up circuit is recorded as the first signal, and the signal transmitted using the main circuit is recorded as the second signal. Then, the first signal can also represent the signal transmitted using the first frequency resource, and the second signal can also represent the signal transmitted using the second frequency resource.

[0141] 1) The modulation modes of the first signal and the second signal are different.

[0142] For example, the modulation mode of the first signal is on off key (OOK), and the modulation mode of the second signal is orthogonal frequency division multiplexing (OFDM) modulation or discrete fourier transformation-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) modulation.

[0143] 2) The modulation modes of the first signal and the second signal are different.

[0144] For example, the waveform of the first signal is OOK, and the waveform of the second signal is an OFDM waveform or a DFT-s-OFDM waveform.

[0145] 3) The first signal and the second signal are different.

[0146] For example, the first signal includes paging information. The paging information includes information of one or more terminal devices that need to receive paging. As to what information is contained in the first signal, it can be predefined by a standard or configured by a network side, without limitation. The "network side configuration" means that the network side configures through the second link. For example, the terminal device obtains the configuration information of the first link on the second link, and then works on the first link.

[0147] For another example, the second signal can be a signal different from the first signal. The second signal can represent, for example, various downlink signals or channels in the NR signals (i.e., existing NR signals). As an example, the second signal includes any one or more of the following: a synchronization signal block (SSB), a PDCCH, a PDSCH, a channel state information reference signal (CSI-RS), a phase tracking reference signal (PTRS), a positioning reference signal (PRS), a demodulation reference signal (DMRS). The second signal can also represent various uplink signals or channels in the NR signals. As an example, the second signal includes any one or more of the following: a DMRS, a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), a sounding reference signal (SRS).

[0148] For another example, the second signal can carry one or more of the following information: a paging early indication (PEI), a paging DCI, a paging message (e.g., a paging PDCCH and a paging PDSCH). The PEI can be used to indicate whether there is a paging transmission in its associated PO.

[0149] For another example, the second signal can represent a signal in a random access procedure of a terminal device. For example, the second signal includes a random access preamble.

[0150] 4、OOK

[0151] In order to ensure the power consumption benefit, the signal can adopt OOK modulation, i.e., using the transmission or non-transmission of the signal to modulate the information, and the corresponding wake-up circuit can adopt an envelope detection method to receive the signal. The OOK modulation technology can realize demodulation with a receiver having very low complexity, so as to realize the low power consumption target of the wake-up circuit.

[0152] When the signal is modulated by OOK, each bit (i.e. coded bit) can correspond to a symbol. Equivalently, a symbol can also be referred to as a chip, or other names, which are not limited here.

[0153] For example, when the bit is 1, there is signal emission within the symbol length (i.e. the signal transmission power within the symbol length is not 0); when the bit is 0, there is no signal emission within the symbol length (i.e. the signal transmission power within the symbol length is 0). Alternatively, it can also be understood that in OOK modulation, if energy is transmitted, it represents "1", and if no energy is transmitted, it represents "0".

[0154] As an example, FIG. 3 is a waveform diagram when the signal is modulated by OOK. As shown in FIG. 3 , the waveform shown can represent "0100" four bits. As shown in FIG. 3 , the communication system generally transmits using a certain frequency (frequency). The transmitted signal needs to be modulated on the carrier (the sinusoidal signal in FIG. 3 represents the carrier). At the receiving end, the receiving end detects the envelope (or energy) of the received signal to determine whether the transmitted symbol is "0" or "1", thereby completing demodulation. FIG. 3

[0155] When the signal is modulated by OOK, the structure of the receiver is simple, the power consumption is low, and the goal of saving power of the wake-up circuit can be achieved. However, the transmission rate is low. Specifically, on the one hand, when the signal is modulated by OOK, each symbol can only transmit 1 bit. On the other hand, considering the multipath delay problem of the wireless communication system, the time length of each symbol needs to be long enough to reduce the inter-symbol interference caused by the multipath delay. Therefore, if the signal is modulated by OOK, each symbol carries 1 bit of information, and the time length of each symbol is relatively long, so the transmission rate will be very low.

[0156] 5、OFDM

[0157] OFDM is a widely used modulation technique. OFDM mainly divides the system bandwidth into a plurality of parallel subcarriers, and modulates and transmits data on each subcarrier.

[0158] As an example, FIG. 4 is a schematic diagram of transmitting and receiving signals using OFDM modulation technology.

[0159] As shown in FIG. 4 ​As shown, the procedure of sending signal at the sending end can include the following steps. The coded bit stream is modulated to obtain a plurality of symbols, where the modulation method for modulating the coded bit stream can be, for example, quadrature amplitude modulation (QAM), and the obtained symbols are, for example, QAM symbols. The modulated symbols are subjected to serial / parallel (S / P) conversion, and the S / P processed symbols are respectively mapped to different subcarriers. The symbols on different subcarriers are subjected to inverse fast Fourier transform (IFFT) operation. The IFFT processed symbols are subjected to cyclic prefix (CP) addition, parallel / serial (P / S) conversion, digital-to-analog (D / A) conversion, and then transmitted to a channel.

[0160] As shown, FIG. 4 the procedure of receiving signal at the receiving end can include the following steps. After the received signal is subjected to analog-to-digital (A / D) conversion, carrier frequency offset (CFO) correction is performed, and then S / P conversion and CP removal are performed. The CP removed signal is subjected to fast Fourier transform (FFT) operation, and then phase tracking, P / S conversion, and finally demodulation.

[0161] It can be understood that the specific procedures of the above sending signal and receiving signal are exemplary and are not limited thereto.

[0162] OFDM modulation is actually a division of the frequency spectrum resources of the system into a time-frequency two-dimensional grid. As an example, FIG. 5 is a schematic diagram of the division of the frequency spectrum resources of OFDM modulation. As shown in FIG. 5 , in the time domain dimension, the division is performed in the granularity of OFDM symbols; and in the frequency dimension, the division is performed in the granularity of subcarriers. Within each OFDM symbol, a QAM signal can be transmitted on each subcarrier. In some systems, for example, in LTE and NR systems, a physical resource block (PRB) can include a plurality of subcarriers, for example, a PRB includes 12 subcarriers, for example, FIG. 5 PRB 0 in FIG. 1 includes subcarriers 0-11, PRB 1 includes subcarriers 12-23, and PRB 2 includes subcarriers 24-35.

[0163] OFDM modulation can employ different sub-carrier space (SCS). Generally, when the operating frequency band is high, the multipath delay of wireless transmission is small, and the phase noise of the device is large, it is more suitable to use high sub-carrier space; when the operating frequency band is low, the multipath delay is rich, and the phase noise of the device is small, it is more suitable to use low sub-carrier space.

[0164] In order to adapt to different deployment conditions, a plurality of optional sub-carrier spaces are defined in some communication systems for actual deployment. For example, in the 5G NR system, a plurality of sub-carrier spaces are defined, including: 15 kHz, 30 kHz, 60 kHz, 120 kHz and 240 kHz.

[0165] In some communication systems, such as the 5G NR system, the operating frequency of the system is divided into two frequency ranges (frequency range, FR), namely FR1 (410 MHz-7.125 GHz) and FR2 (24.25 GHz-52.6 GHz). The frequency band of FR1 is lower than that of FR2, and FR2 operates at a higher frequency band, generally referred to as a millimeter wave frequency band. The frequency band used by traditional cellular wireless communication is generally FR1, and in the 5G system, the frequency band used in some small coverage scenarios can include FR2.

[0166] As mentioned above, high sub-carrier space is suitable for high frequency deployment, and low sub-carrier space is suitable for low frequency deployment. Therefore, generally, the sub-carrier spaces that can be used by FR1 include: 15 kHz, 30 kHz and 60 kHz; the sub-carrier spaces that can be used by FR2 include: 60 kHz, 120 kHz and 240 kHz.

[0167] It can be understood that when the sub-carrier space is widened, the time length of the OFDM symbol will be shortened. As an example, FIG. 6 is a schematic diagram of the time domain and frequency domain resources of OFDM corresponding to different sub-carrier spaces. As FIG. 6 shown, when the sub-carrier space is widened from 15 kHz to 30 kHz, the time length of the OFDM symbol will be halved.

[0168] OFDM technology requires high complexity for the receiver, and from the perspective of power saving, OFDM technology is not the best choice for the wake-up circuit.

[0169] 6、OOK modulation technology based on OFDM transmitter

[0170] OOK modulation technology based on OFDM transmitter, that is, generating OOK signal based on OFDM transmitter. Specifically, OFDM transmitter is used to modulate signal, some OFDM symbols modulate signal on subcarriers and transmit, such OFDM symbols represent "ON" (that is, represent "1" in OOK signal, or signal transmission power is not 0 in the symbol length, or there is signal emission in the symbol length); some OFDM symbols do not transmit signal on subcarriers, such OFDM symbols represent "OFF" (that is, represent "0" in OOK signal, or signal transmission power is 0 in the symbol length, or there is no signal emission in the symbol length).

[0171] In the embodiment of the application, OOK signal can be generated based on OFDM transmitter, so as to not only reduce the power consumption of the wake-up circuit, but also reduce the complexity of the transmitter.

[0172] As an example, FIG. 7 is a schematic diagram of generating OOK signal based on OFDM transmitter. As shown in FIG. 7 , some OFDM symbols modulate signal on subcarriers and transmit, such OFDM symbols represent "ON", and some OFDM symbols do not transmit signal, such OFDM symbols represent "OFF". For example, FIG. 7 , the OFDM symbols in the shaded part in (a) of FIG. 1 have 12 subcarriers modulating signal, and after inverse fast fourier transform (IFFT), OFDM signal is obtained and transmitted normally. For another example, FIG. 7 , the OFDM symbols in the white part in (a) of FIG. 1 do not transmit signal. In this way, the time domain waveform obtained by the receiver is as shown in FIG. 7 (b) of FIG. 1. In this way, although the signal is generated by OFDM transmitter, the receiver can demodulate it as OOK signal.

[0173] The above is an example for illustration, and the application is not limited thereto.

[0174] If the first signal and the second signal are transmitted by time division, the spectrum resource may be wasted. FIG. 8 is a schematic diagram of transmitting the first signal and the second signal by time division. As shown in FIG. 8 , the sending end can transmit the first signal, and after the main circuit is woken up, the second signal is transmitted. The amount of information to be transmitted on the wake-up circuit is small, and in order to achieve the effect of energy saving, a relatively narrow bandwidth (such as 4MHz bandwidth) can be used, and the main circuit may be large data volume communication, so a relatively wide bandwidth (such as 20MHz bandwidth) may be occupied.

[0175] AsFIG. 8 As shown, at the time of sending the first signal, only a narrow bandwidth is used, such as FIG. 8 The WUR bandwidth in the above network architecture is 4MHz. The system bandwidth is 20MHz, so at the time of sending the first signal, most of the system bandwidth is not used, causing a great waste of spectrum resources.

[0176] Therefore, the present application provides a solution to solve the problem of spectrum resource waste caused by sending the first signal and the second signal in a time division manner.

[0177] It can be understood that the term "and / or" in this paper is only to describe the association relationship of the associated objects, which means that there are three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents an "or" relationship between the associated objects before and after it.

[0178] It can also be understood that the length mentioned in this paper, such as the length of CP, the length of symbol, refers to the time length. For example, the unit of the length (i.e. time length) mentioned in this paper can be T c = 1 / (4096·480·10 3 ) seconds. For another example, the time length can also be represented by the number of time domain sampling points, which is not limited.

[0179] The above briefly describes the terms involved in the present application, which will not be repeated in the following embodiments.

[0180] The method for transmitting signals provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments provided by the present application can be applied to the network architecture shown in the above FIG. 1 There is no limitation.

[0181] FIG. 9 is a schematic diagram of a signal transmission method 900 provided by an embodiment of the present application. Taking the interaction between a terminal device and a network device as an example, the method 900 can include the following steps.

[0182] 910, the terminal device receives a first signal from the network device using a first frequency resource.

[0183] In step 910, the terminal device receives a first signal from the network device using a first frequency resource, which can be replaced by any of the following: the terminal device receives a first signal from the network device through a first module, the terminal device receives a first signal from the network device on a first link, the terminal device receives a first signal from the network device when it is in a first state, and the terminal device receives a first signal from the network device when it is in a first mode.

[0184] 920, based on the first signal, the terminal device transmits a second signal to the network device using a second frequency resource.

[0185] Based on the first signal, for example, it can also be replaced by responding to the first signal. In step 920, based on the first signal, the terminal device transmits a second signal to the network device using a second frequency resource, which can be understood as, in response to the first signal, the terminal device transmits a second signal to the network device using a second frequency resource. For example, FIG. 2 For example, after the terminal device receives (or detects) the first signal using the first frequency resource, the terminal device transmits the second signal to the network device using the second frequency resource.

[0186] In step 920, the terminal device transmits a second signal to the network device using a second frequency resource, which can be replaced by any of the following: the terminal device transmits a second signal to the network device through a second module, the terminal device transmits a second signal to the network device on a second link, the terminal device transmits a second signal to the network device when it is in a second state, and the terminal device transmits a second signal to the network device when it is in a second mode.

[0187] Among them, the first signal represents the signal transmitted using the first frequency resource (or the signal transmitted using the wake-up circuit), and the second signal represents the signal transmitted using the second frequency resource (or the signal transmitted using the main circuit).

[0188] As a possible case, in step 920, based on the first signal, the terminal device transmits a second signal to the network device using a second frequency resource, including: in response to the first signal, the terminal device initiates random access to the network device using the second frequency resource, and the second signal can represent a signal in the random access process of the terminal device, for example, the second signal includes a random access preamble sequence. At this time, the terminal device transmits a second signal to the network device using a second frequency resource, which can be replaced by: the terminal device transmits a second signal to the network device using a second frequency resource.

[0189] As another possible case, in step 920, based on the first signal, the terminal device transmits a second signal to the network device using a second frequency resource, including: in response to the first signal, the terminal device receives a paging from the network device using the second frequency resource, and the second signal can carry one or more of the following information: PEI, paging DCI, paging message (such as paging PDCCH and paging PDSCH). At this time, the terminal device transmits a second signal to the network device using a second frequency resource, which can be replaced by: the terminal device receives a second signal sent by the network device using a second frequency resource.

[0190] Regarding the first signal and the second signal, please refer to the previous description, which will not be repeated here.

[0191] Among them, the first frequency resource and the second frequency resource are different frequency domain resources in the system bandwidth.

[0192] Taking the first and second links as examples, assuming the system bandwidth is F, a portion of the frequency band (denoted as F1) can be allocated to the first link, and the remaining frequency band (F-F1) can be allocated to the second link. The first frequency resource is different from the second frequency resource, meaning that the second link does not use the frequency domain resource of F1.

[0193] FIG. 10 This is a schematic diagram of signal transmission on a first link and a second link according to an embodiment of this application.

[0194] like FIG. 10 As shown, a portion of the subcarriers in the system bandwidth (such as...) FIG. 10 The WUR bandwidth is allocated to the first link, and the remaining subcarriers are allocated to the second link for transmitting the second signal. On some subcarriers within the WUR bandwidth, certain OFDM symbols modulate the signal and transmit it; these OFDM symbols represent "ON". Other OFDM symbols do not transmit the signal; these OFDM symbols represent "OFF". For example, a network device uses subcarriers with the WUR bandwidth to transmit a first signal to a first terminal device on the first link, and uses the remaining subcarriers on the second link to transmit signals (such as transmitting a second signal) to other terminal devices (such as a second terminal device).

[0195] Optionally, before step 910, method 900 further includes step 901.

[0196] 901, The terminal device uses the second frequency resource to receive the configuration information of the first frequency resource.

[0197] In step 901, the terminal device uses the second frequency resource to receive the configuration information of the first frequency resource, which can be replaced by any of the following: the terminal device receives the configuration information of the first frequency resource through the second module, the terminal device receives the configuration information of the first frequency resource on the second link, the terminal device receives the configuration information of the first frequency resource when it is in the second state, or the terminal device receives the configuration information of the first frequency resource when it is in the second mode.

[0198] Before using the first link, network devices and terminal devices can determine the configuration information of the first frequency resource. For example, this can be agreed upon through a protocol; or the network device can configure it and then send it to the terminal device.

[0199] For example, the configuration information of the first frequency resource includes one or more of the following: the bandwidth of the first frequency resource, the frequency domain location of the first frequency resource, and the subcarrier spacing of the first frequency resource.

[0200] wherein, the bandwidth of the first frequency resource, represents the bandwidth used by the first link, or the bandwidth width occupied by the first link. For example, the bandwidth of the first frequency resource is the width of N wur,rb PRBs, and N wur,rb is an integer greater than 1 or equal to 1. For example, N wur,rb = 2; or for example, N wur,rb = 3.

[0201] wherein, the frequency domain location of the first frequency resource, represents the frequency domain location used by the first link, such as the frequency domain location of the first frequency resource includes the location of resource blocks (RBs).

[0202] For example, the frequency domain location of the first frequency resource can include the starting location of the RBs and the number of RBs. Through the starting location of the RBs and the number of RBs, the terminal device can determine the location of the RBs, i.e., can know the frequency domain location of the first frequency resource.

[0203] For another example, the frequency domain location of the first frequency resource includes the starting location of the RBs. The number of RBs can be pre-agreed or pre-configured by the network side, without limitation. Through the starting location of the RBs, the terminal device can determine the location of the RBs, i.e., can know the frequency domain location of the first frequency resource.

[0204] wherein, the subcarrier spacing of the first frequency resource, represents the subcarrier spacing used by the first link, or the length of the first signal symbol.

[0205] Optionally, the subcarrier spacing of the first frequency resource is different from the subcarrier spacing of the second frequency resource.

[0206] For example, the subcarrier spacing of the first frequency resource is greater than the subcarrier spacing of the second frequency resource.

[0207] As described above, the subcarrier spacing that can be used by FR1 includes: 15 kHz, 30 kHz and 60 kHz; and the subcarrier spacing that can be used by FR2 includes: 60 kHz, 120 kHz and 240 kHz. In the embodiments of the present application, if the first link is deployed in FR1, as an example, the first link can use the subcarrier spacing of FR2, i.e., the subcarrier spacing of the first frequency resource can include: 60 kHz, 120 kHz and 240 kHz, so as to improve the transmission rate of the first link. Wherein, the transmission rate, i.e., represents the data transfer rate.

[0208] Specifically, the transmission rate is affected by the time length of the OFDM symbol. The time length of the OFDM symbol is related to the subcarrier spacing, and the smaller the subcarrier spacing is, the longer the time length of the OFDM symbol is, so the transmission rate of the OOK signal generated by using the OFDM transmitter is lower. Smaller subcarrier spacing is generally used in a lower frequency band (for example, FR1), so the transmission rate is also lower. For example, if a cell deployed in an FR1 uses a subcarrier spacing of 30 kHz, the time length of an OFDM symbol is about 33.33 us, and considering the overhead caused by the cyclic prefix, the maximum transmission rate that can be achieved by using OOK modulation is 28 kilobits per second (kbps). In many cases, this transmission rate is insufficient to support the traffic volume of the first signal in the cell. Therefore, the first link can use the subcarrier spacing originally used for FR2, that is, the subcarrier spacing of the first link is increased, and thus the transmission rate of the first link can be improved.

[0209] As an example, FIG. 11 FIG. 1 is a schematic diagram of a first link and a second link using different subcarrier spacings according to an embodiment of the present application.

[0210] As FIG. 11 indicated, the subcarrier spacing for transmitting the first signal is 240 kHz, and the subcarrier spacing for transmitting the second signal is 30 kHz. Compared with the 30 kHz subcarrier spacing, the OFDM symbol of the 240 kHz subcarrier spacing is 8 times larger, the corresponding OFDM symbol length is 8 times shorter, and the transmission rate of the first link can be improved by 8 times, for example, the transmission rate of the first link can be improved from 28 kbps to 224 kbps. As can be seen from FIG. 11 , in the time range of one OFDM symbol of the second signal, the first signal can transmit 8 symbols, so the transmission rate is greatly improved.

[0211] Optionally, the time for the terminal device to demodulate the first signal using the first frequency resource is related to a preset time length, and the preset time length is different from the length of the cyclic prefix corresponding to the subcarrier spacing of the first frequency resource.

[0212] In one possible implementation, the terminal device demodulates the first signal from the network device using the first frequency resource after a preset time length from the start time of each received symbol.

[0213] The subcarrier spacing can correspond to a length of a cyclic prefix, in other words, each subcarrier spacing corresponds to a length of a cyclic prefix. If a larger subcarrier spacing is used, the length of the cyclic prefix corresponding to the larger subcarrier spacing is smaller. In some communication systems, such as OFDM communication systems, a cyclic prefix is used to combat inter symbol interference caused by multipath delay. If a larger subcarrier spacing is used for the first frequency resource, the cyclic prefix corresponding to the larger subcarrier spacing can not be able to combat the inter symbol interference caused by the multipath delay of the channel. Therefore, embodiments of the present application propose a preset time length, which is used to solve the impact of the multipath delay that the first link using a larger subcarrier spacing can face. The preset time length, for example, can also be referred to as a guard time length, such as inter symbol interference guard interval (ISI-GI), which is not limited to the protection scope of the present application, and is described below as a preset time length. The above scheme is described in detail below.

[0214] Generally, inter symbol interference (ISI) caused by the multipath delay of a channel can be combated by setting a subcarrier spacing and adding a guard interval (such as a CP) between symbols. For example, if the multipath delay of a channel is large, a smaller subcarrier spacing can be used, so that the length of a symbol itself is larger than the multipath delay of the channel, and then a CP is added in front of the OFDM symbol, and the length of the CP is longer than the length of the multipath delay. In this way, at the receiving end, after removing the CP, the impact of the inter symbol interference caused by the multipath delay can be avoided.

[0215] As an example, FIG. 12 is a schematic diagram of the multipath delay and the ISI time length.

[0216] As shown in FIG. 12 , for a time domain diagram of a transmission symbol (i.e., an OFDM symbol) corresponding to a subcarrier spacing of 30 kHz, the transmission symbol includes a CP and a data part. After passing through a multipath channel, due to the CP, the receiving window at the receiving end will not be affected by the previous symbol. The receiver processes the data in the receiving window to avoid the impact of ISI.

[0217] For the first link, a larger subcarrier spacing can be used to improve the transmission rate. However, the larger subcarrier spacing can face the impact of the multipath delay. As FIG. 12As shown, for the time-domain diagram of the transmission symbol corresponding to the subcarrier spacing of 120 kHz, the first transmission symbol represents "ON", that is, the signal is transmitted on the first transmission symbol, and the second transmission symbol represents "OFF", that is, no signal is transmitted on the second transmission symbol. Under the same multipath delay condition, if the subcarrier spacing of the first link is set to 120 kHz, the subcarrier spacing is 4 times larger than 30 kHz, the time length of the transmission symbol is shortened to 1 / 4 of the original, and the length of the corresponding CP is also shortened to 1 / 4 of the original. Thus, in the face of the same multipath delay, the length of the CP can be shorter than the length of the multipath delay. For example, FIG. 12 The length of the CP corresponding to the subcarrier spacing of 120 kHz is the length of (t1-t0), where the time delay τ2 of the second path in the multipath exceeds the length of the CP. Thus, if the time after the removal of the CP is still used as the receiving time window (that is, the time from t1 to t3), the inter-symbol interference ISI caused by the previous symbol will be received. Therefore, the embodiment of the present application proposes to use a preset time length to solve the influence of the multipath delay that the first link may face when using a larger subcarrier spacing.

[0218] The preset time length refers to a certain time length, which should exceed the time length of the inter-symbol interference caused by the multipath delay. The length of the preset time length is different from the length of the CP corresponding to the subcarrier spacing of the first frequency resource. For example, the length of the preset time length can be equal to the length of the CP corresponding to the transmission of the second signal, for example, the length of the preset time length can be selected as the length of the CP corresponding to the subcarrier spacing of 30 kHz, which is different from the length of the CP corresponding to the subcarrier width (120 kHz) of the second signal. FIG. 12 For example, the length of the preset time length can be selected as the length of the CP corresponding to the subcarrier spacing of 30 kHz, which is different from the length of the CP corresponding to the subcarrier width (120 kHz) of the second signal. The time window of the receiving end can exclude the preset time length. For example, the receiving symbol is at t2, the preset time length refers to the time from t0 to t2, that is, the length of the CP corresponding to the subcarrier spacing of 30 kHz, and the receiving end can use the time from t2 to t3 as the receiving time window, that is, start demodulating the first signal from t2. FIG. 12

[0219] The preset time length can be predefined by the standard or configured by the network side. If configured by the network side, the network side can send the configured preset time length to the terminal device.

[0220] A possible design is that the network side configures the preset time length and sends the preset time length to the terminal device. For example, the preset time length can be sent to the terminal device in other information, such as in the configuration information of the first frequency resource; or the preset time length can also be sent to the terminal device separately.

[0221] ​Another possible design, the network side configures or the standard predefines the association relationship between the preset time length and other information, and according to the other information and the association relationship, the preset time length can be determined. The following gives several possible schemes.

[0222] Scheme 1, the preset time length is associated with the frequency band where the first signal is located. To distinguish, the association relationship can be recorded as association relationship #1. Wherein, the association relationship #1 can be predefined, or can be predefined by the standard, or can be configured by the network side. Wherein, if configured by the network side, the network side can send the association relationship #1 to the terminal device.

[0223] Based on this scheme 1, the network device can indicate the frequency band where the first signal is located to the terminal device, and then the terminal device can determine the length of the preset time length corresponding to the first signal based on the frequency band where the first signal is located and the association relationship #1.

[0224] As an example, the association relationship #1 can exist in the form of table 1.

[0225] Table 1

[0226] band Length of preset duration (unit: μs) band1 n1 band2 n2 band 3 n3

[0227] Taking table 1 as an example, for example, if the frequency band where the first signal is located is band 1, the length of the preset time length corresponding to the first signal is n1 μs; if the frequency band where the first signal is located is band 2, the length of the preset time length corresponding to the first signal is n2 μs; if the frequency band where the first signal is located is band 3, the length of the preset time length corresponding to the first signal is n3 μs.

[0228] It should be understood that table 1 is only an example and is not limited to this. Any variation of table 1 is applicable to the present application. For example, the frequency band can include a larger number of frequency bands, and accordingly, the length of the preset time length can include a larger number of lengths. For another example, the frequency band can be a specific value or a certain range, such as band 1 can be a certain value or band 1 can be a certain range.

[0229] Scheme 2, the preset time length is associated with the CP length of the bandwidth part (BWP), wherein the BWP can be a certain specific BWP, such as initial BWP. To distinguish, the association relationship can be recorded as association relationship #2. Wherein, the association relationship #2 can be predefined, or can be predefined by the standard, or can be configured by the network side. Wherein, if configured by the network side, the network side can send the association relationship #2 to the terminal device.

[0230] Based on the scheme 2, taking the initial BWP as an example, the terminal device can obtain the subcarrier spacing adopted by the initial BWP from the system information when reading the system information, and then the terminal device can calculate the CP length adopted by the initial BWP, and then the terminal device can determine the length of the preset time length corresponding to the first signal based on the CP length adopted by the initial BWP and the association relationship #2.

[0231] As an example, taking the initial BWP as an example, the association relationship #2 can exist in the form of Table 2.

[0232] Table 2

[0233] CP length adopted by initial BWP Length of preset duration (unit: μs) CP 1 n1’ CP 2 n2’ CP 3 n3’

[0234] Taking Table 2 as an example, for example, if the CP length adopted by the initial BWP is CP 1, then the length of the preset time length corresponding to the first signal is n1' μs; if the CP length adopted by the initial BWP is CP 2, then the length of the preset time length corresponding to the first signal is n2' μs; if the CP length adopted by the initial BWP is CP 3, then the length of the preset time length corresponding to the first signal is n3' μs.

[0235] It should be understood that Table 2 is only an example and is not limited thereto, and any modification of Table 2 is applicable to the present application. For example, the CP length adopted by the initial BWP can also include a larger number of CP lengths, and accordingly, the length of the preset time length can include a larger number of lengths. For another example, the initial BWP can also be replaced by other BWPs.

[0236] Scheme 3, the preset time length is associated with the subcarrier spacing of the first frequency resource. To distinguish, the association relationship can be recorded as association relationship #3. Wherein, the association relationship #3 can be predefined, can also be predefined by standard, or can be configured by the network side. Wherein, if configured by the network side, the network side can send the association relationship #3 to the terminal device.

[0237] Based on the scheme 3, the network device can indicate the subcarrier spacing of the first signal to the terminal device, and then the terminal device can determine the length of the protection time length corresponding to the first signal based on the subcarrier spacing of the first signal and the association relationship #3.

[0238] As an example, the association relationship #3 can exist in the form of Table 3.

[0239] Table 3

[0240] Subcarrier spacing (unit: kHz) Length of guard duration (unit: μs) 60 n1” 120 n2” 240 n3”

[0241] For example, referring to Table 3, if the subcarrier spacing of the first signal is 60 kHz, the length of the guard duration corresponding to the first signal is n1" μs; if the subcarrier spacing of the first signal is 120 kHz, the length of the guard duration corresponding to the first signal is n2" μs; if the subcarrier spacing of the first signal is 240 kHz, the length of the guard duration corresponding to the first signal is n3" μs.

[0242] It should be understood that Table 3 is only an example and is not limited in this regard, and any variation of Table 3 is applicable to the present application. For example, the subcarrier spacing can include a larger number of values, and correspondingly, the length of the guard duration can include a larger number of lengths.

[0243] In the embodiments of the present application, the guard subcarrier or time domain windowing can be used to reduce the inter-subcarrier interference between the first signal and the second signal.

[0244] In the case where the subcarrier spacing of the first frequency resource is different from the subcarrier spacing of the second frequency resource, the orthogonality between the first signal and the second signal can be destroyed, and thus the inter-subcarrier interference can exist between the first signal and the second signal. The orthogonality can refer to that, under ideal time-frequency synchronization conditions, there is no mutual interference between subcarriers.

[0245] As an example, FIG. 13 is a schematic diagram of the case where there is no interference and the case where there is interference between subcarriers.

[0246] As shown in (a) of FIG. 10, FIG. 13 assuming that the first signal is modulated by using 4 subcarriers, and the subcarrier spacing used by the first signal is the same as that of the adjacent second signal (for example, both are 30 kHz), after the FFT operation, the energy of the first signal is concentrated on the modulated subcarriers, and does not leak to the adjacent subcarriers. As shown by line (1) in (b) of FIG. 10, FIG. 13 assuming that the subcarrier spacing used by the first signal is different from that of the adjacent second signal (for example, the subcarrier spacing used by the first signal is 30 kHz, and the subcarrier spacing used by the second signal is 60 kHz), after the FFT operation, the energy of the first signal leaks to the adjacent subcarriers, and destroys the orthogonality between the subcarriers.

[0247] In this regard, the embodiments of the present application propose that the guard subcarrier or time domain windowing can be used to reduce the inter-subcarrier interference between the first signal and the second signal. The following describes the two methods.

[0248] Method 1: using the guard subcarrier to reduce the inter-subcarrier interference.

[0249] In example 1, the terminal device receives the first signal from the network device using subcarriers in the first frequency resource except for N1 subcarriers, where N1 is an integer greater than 1 or equal to 1.

[0250] Based on example 1, when transmitting the first signal on the first link, the first signal is transmitted using subcarriers in the first frequency resource except for N1 subcarriers. It can be understood that N1 is less than the total number of subcarriers of the first frequency resource, or in other words, N1 is less than the total number of subcarriers of the bandwidth used by the first link. As an example, N1 may, for example, be 1 or 2.

[0251] The N1 subcarriers can be understood as guard subcarriers or edge subcarriers. The N1 subcarriers represent one or more subcarriers in the first frequency resource adjacent to the second frequency resource. The N1 subcarriers can include one or more of the highest-numbered subcarriers in the bandwidth of the first link (i.e., the bandwidth of the first frequency resource) and / or one or more of the lowest-numbered subcarriers in the bandwidth of the first link. By providing guard subcarriers on one or both sides of the bandwidth allocated to the first link, on which the first signal is not transmitted, even if the subcarrier spacing of the first frequency resource is different from the subcarrier spacing of the second frequency resource, the subcarrier interference between the first signal transmitted using the first frequency resource and the second signal transmitted using the second frequency resource is greatly reduced due to the presence of the guard subcarriers.

[0252] Suppose the first frequency resource includes the bandwidth used by the first link, and the bandwidth used by the first link includes N subcarriers, where N is an integer greater than N1. The terminal device receives the first signal from the network device using subcarriers in the first frequency resource except for N1 subcarriers, or in other words, the terminal device receives the first signal from the network device using one or more of the middle subcarriers of the N subcarriers, or the frequency resource available to the terminal device for receiving the first signal is located in one or more of the middle subcarriers of the N subcarriers. As an example, the terminal device receives the first signal from the network device using N3 subcarriers in the middle of the N subcarriers, where N3 is an integer greater than 1 or equal to 1, and N3 is less than N.

[0253] For example, the N1 subcarriers include one or more of the highest-numbered subcarriers of the N subcarriers and one or more of the lowest-numbered subcarriers of the N subcarriers. In this way, guard subcarriers are provided on both sides of the bandwidth allocated to the first link, on which the first signal is not transmitted, and the guard subcarriers serve as a guard interval between the first signal and the second signal, reducing the subcarrier interference between the first signal and the second signal. FIG. 14 is a schematic diagram provided by an embodiment of the present application for reducing subcarrier interference using guard subcarriers.

[0254] AsFIG. 14 The bandwidth of the first link (i.e. the WUR bandwidth in the FIG. 14 is N wur,rb PRBs, corresponding to N wur,rb x 12 subcarriers. Guard subcarriers are set on both sides of the bandwidth of the first link, on which no signal is transmitted, as a guard interval between the first signal and the second signal. The first signal is modulated on the N3 subcarriers in the middle, N3 can be 1, or can also be greater than 1. In this way, even if the subcarrier spacing of the first frequency resource is different from the subcarrier spacing of the second frequency resource, because of the existence of the guard subcarriers, the subcarrier interference between the first signal transmitted using the first frequency resource and the second signal transmitted using the second frequency resource will still be greatly reduced.

[0255] Example 2, the terminal device transmits the second signal with the network device using the subcarriers in the second frequency resource except for N2 subcarriers, N2 being an integer greater than 1 or equal to 1.

[0256] Based on example 2, when transmitting the second signal on the second link, the second signal is transmitted using the subcarriers in the second frequency resource except for N2 subcarriers. It can be understood that N2 is less than the total number of subcarriers of the second frequency resource, or in other words, N2 is less than the total number of subcarriers of the bandwidth used by the second link. As an example, N2 can be 1 or 2, for example.

[0257] wherein the N2 subcarriers can be understood as guard subcarriers, or edge subcarriers. The N2 subcarriers represent one or more subcarriers in the second frequency resource adjacent to the first frequency resource. By setting guard subcarriers on one or both sides of the bandwidth allocated to the second link, on which no second signal is transmitted, in this way, even if the subcarrier spacing of the first frequency resource is different from the subcarrier spacing of the second frequency resource, because of the existence of the guard subcarriers, the subcarrier interference between the first signal transmitted using the first frequency resource and the second signal transmitted using the second frequency resource will still be greatly reduced.

[0258] FIG. 15 is another schematic diagram for reducing subcarrier interference using guard subcarriers according to an embodiment of the present application.

[0259] As shown in FIG. 15 , guard subcarriers are set on the bandwidth adjacent to the first link on the second link, on which no signal is transmitted, as a guard interval between the first signal and the second signal. In this way, even if the subcarrier spacing of the first frequency resource is different from the subcarrier spacing of the second frequency resource, because of the existence of the guard subcarriers, the subcarrier interference between the first signal transmitted using the first frequency resource and the second signal transmitted using the second frequency resource will still be greatly reduced.

[0260] The above mainly introduces mode 1, and mode 2 is introduced below.

[0261] Mode 2, time domain windowing.

[0262] Optionally, the first signal is a signal after multiplication of a time domain signal and a window function. The time domain windowing means that a window function is multiplied with an OFDM symbol to obtain a windowed signal.

[0263] In the embodiment of the present application, the first signal is multiplied with a time domain window function after FFT modulation and conversion into a time domain signal and then is transmitted. In this way, the subcarrier interference between the first signal and the second signal can be reduced through time domain windowing.

[0264] The window function may be, for example, a function with small values at both ends and large values in the middle. As an example, the window function may be, for example, a raised cosine window, a Hamming window, a Hanning window, a Gaussian window, etc. A raised cosine window is taken as an example below to give an implementation mode.

[0265] Suppose that an OFDM time domain signal after FFT and addition of a CP is denoted as s ofdm (n), the sampling point number of an OFDM symbol is denoted as N ofdm , 0≤n<N ofdm , and a window function is denoted as w(n). As an example, the construction method of a raised cosine window may be as follows: the values of the first N pf elements satisfy formula 1, the values of the last N pf elements are the reverse sequence of the first N pf sampling points, and the values of the (N ofdm -2N pf ) middle elements are 1.

[0266]

[0267] It should be noted that the construction method of the raised cosine window above is only an example and the embodiment of the present application is not limited thereto.

[0268] As an example, FIG. 16 is a schematic diagram of a raised cosine window function according to the embodiment of the present application. FIG. 16 It is shown that the raised cosine window function is N ofdm =1024 and N pf =200.

[0269] The time domain windowing means that a window function is multiplied with an OFDM symbol to obtain a windowed signal As an example, the signal after windowing processing satisfies formula 2.

[0270]

[0271] The out-of-band leakage of the OFDM symbol after time domain windowing is significantly reduced. As shown in curve (2) in (b) of FIG. 8, the out-of-band leakage of the first signal is greatly reduced after time domain windowing. FIG. 13

[0272] Optionally, the frequency domain locations of the first frequency resources are discontinuous.

[0273] To achieve the low power consumption target of the wake-up circuit, a narrow bandwidth can be allocated to the first link, i.e., the bandwidth of the first frequency resources is narrow. However, the narrow bandwidth communication system can face the problem of lack of frequency diversity gain. FIG. 17 is a schematic diagram of a channel frequency domain response. As shown in FIG. 9, due to the influence of multipath signals, the frequency domain response of the channel is also uneven, and deep fading can exist in some frequency bands. If the frequency domain location of the first frequency resources is located on the deep fading frequency, such as 20MHz-30MHz, the signal quality of the first signal transmitted using the first frequency resources is poor. FIG. 17

[0274] Therefore, in the embodiments of the present application, the frequency domain locations of the first frequency resources are discontinuous, so that frequency diversity gain can be obtained by frequency hopping, and better transmission effect can be obtained. As shown in FIG. 10, the frequency domain locations of the first frequency resources include two parts, and the frequency domain locations of the two parts are discontinuous. FIG. 17

[0275] As an example, FIG. 18 is a schematic diagram of the frequency domain locations of the first frequency resources according to the embodiments of the present application. As shown in FIG. 11, the frequency domain locations of the first frequency resources can be located on both sides of the system bandwidth, and the middle of the frequency used for transmitting the first signal is discontinuous, so that frequency diversity gain can be obtained by frequency hopping, and better transmission effect can be obtained. FIG. 18 It should be understood that the above is an example, and the frequency domain locations of the first frequency resources can be at any location of the system bandwidth, as long as they are discontinuous. For example, the first frequency resources can include resources in the middle of the system bandwidth, and are discontinuous.

[0276] The discontinuous frequency domain locations of the first frequency resources mean that the frequency domain locations of the first frequency resources include discontinuous multiple frequency domain locations. Optionally, the discontinuous multiple frequency domain locations can be predefined by a standard, or can be configured and indicated by the network side. For example,

[0277] or FIG. 17 For example, the frequency domain locations of the first frequency resources include discontinuous two frequency domain locations, which are denoted as a first frequency domain location and a second frequency domain location for distinction. FIG. 18

[0278] ​​​​For example, the network device can indicate to the terminal device that the starting position of the first frequency domain position is N start,rb1 , the bandwidth of the first frequency domain position is N wur,rb1 , the starting position of the second frequency domain position is N start,rb2 , and the bandwidth of the second frequency domain position is N wur,rb2 .

[0279] For another example, assuming that the bandwidths of the frequency domain positions are the same, the network device can indicate to the terminal device that the starting position of the first frequency domain position is N start,rb1 , and the starting position of the second frequency domain position is N start,rb2 . Wherein, the bandwidth of the frequency domain position can be predefined by the standard or configured by the network side. If the bandwidth of the frequency domain position is configured by the network side, the network side can send the bandwidth of the frequency domain position to the terminal device.

[0280] For another example, assuming that the bandwidths of the frequency domain positions are the same, the starting position of the first frequency domain position and the starting position of the second frequency domain position have a correlation, such as denoted as correlation #4. The network device can indicate to the terminal device that the starting position of the first frequency domain position is N start,rb1 , and the terminal device can obtain the starting position of the second frequency domain position according to the starting position of the first frequency domain position and the correlation #4. Wherein, the correlation #4 can be predefined by the standard or configured by the network side. If the correlation #4 is configured by the network side, the network side can send the correlation #4 to the terminal device. As a possible case, the correlation #4 can be N start,rb2 =f(N start,rb1 ), and f denotes a function.

[0281] It can be understood that the above is only an exemplary description, and as long as the scheme can enable the terminal device to obtain the frequency domain position of the first frequency resource, it is applicable to the embodiments of the present application.

[0282] Optionally, if the frequency domain position of the first frequency resource includes multiple frequency domain positions, such as the first frequency domain position and the second frequency domain position, the network device can repeatedly send the first signal in the multiple frequency domain positions, or can also send different parts of the first signal in the multiple frequency domain positions. The following takes the first frequency domain position and the second frequency domain position as an example to introduce the two possible cases.

[0283] As the first possible case, the network device sends part of the first signal in the first frequency domain position and the remaining part of the first signal in the second frequency domain position. Correspondingly, the terminal device receives the part of the first signal from the network device in the first frequency domain position, and the terminal device receives the remaining part of the first signal from the network device in the second frequency domain position.

[0284] As an example,FIG. 19 is a schematic flowchart of transmitting a first signal at discontinuous frequency domain positions according to an embodiment of the present application.

[0285] As shown in FIG. 1, at the transmitting end, the to-be-encoded bits (e.g., “1001”) are encoded to obtain the encoded bit stream (e.g., “11000011”). The encoded bit stream is subjected to interleaving processing, such as writing in rows and reading out in columns. The interleaving-processed signal is subjected to frequency domain position mapping operation. In an embodiment of the present application, the frequency domain positions can be discontinuous frequency domain positions, such as a first frequency domain position and a second frequency domain position. As shown in FIG. 1, the bits mapped to the first frequency domain position are “1001”, and the bits mapped to the second frequency domain position are “1001”. Then, OOK modulation, digital-to-analog conversion, and up conversion processing are performed. It can be understood that the above-mentioned flow is exemplary and the embodiments of the present application are not limited thereto. FIG. 19 FIG. 19 As shown in FIG. 1, at the transmitting end, the to-be-encoded bits (e.g., “1001”) are encoded to obtain the encoded bit stream (e.g., “11000011”). The encoded bit stream is subjected to interleaving processing, such as writing in rows and reading out in columns. The interleaving-processed signal is subjected to frequency domain position mapping operation. In an embodiment of the present application, the frequency domain positions can be discontinuous frequency domain positions, such as a first frequency domain position and a second frequency domain position. As shown in FIG. 1, the bits mapped to the first frequency domain position are “1001”, and the bits mapped to the second frequency domain position are “1001”. Then, OOK modulation, digital-to-analog conversion, and up conversion processing are performed. It can be understood that the above-mentioned flow is exemplary and the embodiments of the present application are not limited thereto.

[0286] As a second possible case, at a first time, the network device transmits the first signal at the first frequency domain position, and at a second time, the network device transmits the first signal at the second frequency domain position. Correspondingly, the terminal device receives the first signal at the first frequency domain position and the second frequency domain position respectively. That is, at the first time, the terminal device receives the first signal at the first frequency domain position, and at the second time, the terminal device receives the first signal at the second frequency domain position.

[0287] In the second possible case, the transmitting end can transmit the encoded bit stream twice, each time using a different frequency domain position. For example, at the transmitting end, the to-be-encoded bits (e.g., “1001”) are encoded to obtain the encoded bit stream (e.g., “11000011”). In one transmission, the encoded bit stream is mapped to the first frequency domain position, and in another transmission, the encoded bit stream is mapped to the second frequency domain position. Then, OOK modulation, digital-to-analog conversion, and up conversion processing are performed. It can be understood that the above-mentioned flow is exemplary and the embodiments of the present application are not limited thereto.

[0288] It can be understood that in the embodiments of the present application, “receiving” can also be replaced by “detecting” or “reading”. For example, “receiving the first signal” can also be replaced by “detecting the first signal” or “reading the first signal”.

[0289] It can also be understood that in some of the above embodiments, “transmitting” is mentioned, and in the case where no special description is made, the transmitting includes receiving and / or transmitting. For example, transmitting a signal can include receiving a signal and / or transmitting a signal.

[0290] ​It can also be understood that in some of the above embodiments, the main circuit and the wake-up circuit, and the main link and the wake-up link are mainly exemplarily illustrated, and the application is not limited thereto. For example, the "wake-up link / wake-up circuit" can also be replaced by "first module", or can also be replaced by "in the first state", or can also be replaced by "in the first mode". For example, "transmitting a signal on the wake-up link", can also be replaced by "transmitting a signal through the first module (or the first circuit)". The "main link / main circuit" can also be replaced by "second module", or can also be replaced by "in the second state", or can also be replaced by "in the second mode". For example, "transmitting a signal on the main link", can also be replaced by "transmitting a signal through the second module (or the second circuit)".

[0291] It can also be understood that the formulas involved in the embodiments of the application are exemplarily illustrated, and do not limit the protection scope of the embodiments of the application. In the process of calculating the above-mentioned various involved parameters, the above-mentioned formulas can also be used for calculation, or the calculation based on the deformation of the above-mentioned formulas, or the calculation according to the formula determined by the method provided by the embodiments of the application, or the calculation according to other ways to meet the results of formula calculation.

[0292] It can also be understood that in the embodiments of the application, the interaction between the terminal device and the network device is mainly exemplarily illustrated, and the application is not limited thereto. The terminal device can be replaced by a receiving end device, and the network device can be replaced by a sending end device. The receiving end device can be a terminal device or a network device, and the sending end device can also be a terminal device or a network device. For example, "terminal device" can be replaced by "first terminal device", and "network device" can be replaced by "second terminal device".

[0293] It can also be understood that the FIG. 9 to FIG. 19 The examples in the above-mentioned embodiments of the application are only for the convenience of those skilled in the art to understand the embodiments of the application, and are not intended to limit the embodiments of the application to the specific scenarios exemplified. Those skilled in the art can obviously make various equivalent modifications or changes according to the examples in the above-mentioned embodiments of the application, and such modifications or changes also fall within the scope of the embodiments of the application. FIG. 9 to FIG. 19

[0294] It can also be understood that some optional features in the embodiments of the application can not depend on other features in some scenarios, or can be combined with other features in some scenarios, without limitation.

[0295] It can also be understood that the solutions in the embodiments of the application can be reasonably combined, and the explanation or description of each term appearing in the embodiments can be mutually referenced or explained in the embodiments, without limitation. ​

[0296] It can also be understood that the methods and operations implemented by the terminal device in the above various method embodiments can also be implemented by components (such as chips or circuits) of the terminal device, and the methods and operations implemented by the network device can also be implemented by components (such as chips or circuits) of the network device, without limitation.

[0297] Corresponding to the methods given in the above various method embodiments, the embodiments of the present application also provide corresponding devices, which include modules for performing the corresponding modules of the above various method embodiments. The modules can be software, hardware, or a combination of software and hardware. It can be understood that the technical features described in the above various method embodiments are also applicable to the following device embodiments.

[0298] FIG. 20 is a schematic block diagram of a communication device provided by the embodiments of the present application. The device 2000 includes a transceiver unit 2010 and a processing unit 2020. The transceiver unit 2010 can be used to implement the corresponding communication function. The transceiver unit 2010 can also be referred to as a communication interface or a communication unit. The processing unit 2020 can be used for data or signal processing.

[0299] Optionally, the device 2000 further includes a storage unit, which can be used to store instructions and / or data. The processing unit 2020 can read the instructions and / or data in the storage unit, so that the device implements the actions of the terminal device in the above various method embodiments.

[0300] The device 2000 can be used to perform the actions performed by the communication device (such as a terminal device, and also like a network device) in the above various method embodiments. At this time, the device 2000 can be a communication device or a component of a communication device. The transceiver unit 2010 is used to perform the transceiver-related operations on the side of the communication device (such as a terminal device, and also like a network device) in the above method embodiments. The processing unit 2020 is used to perform the processing-related operations on the side of the communication device (such as a terminal device, and also like a network device) in the above method embodiments.

[0301] When the device 2000 is used to implement the functions of the terminal device in the above various method embodiments: the transceiver unit 2010 is used to receive a first signal from a network device using a first frequency resource; the transceiver unit 2010 is also used to transmit a second signal with the network device using a second frequency resource based on the first signal; wherein the first frequency resource and the second frequency resource are different frequency domain resources in a system bandwidth, and the subcarrier spacing of the first frequency resource is different from the subcarrier spacing of the second frequency resource.

[0302] The apparatus 2000 can implement the steps or procedures corresponding to those performed by the terminal device in the method embodiments according to the embodiments of the present application. The apparatus 2000 can include units for performing the steps of the methods. FIG. 9 to FIG. 19 The apparatus 2000 can implement the steps or procedures corresponding to those performed by the terminal device in the method embodiments according to the embodiments of the present application. The apparatus 2000 can include units for performing the steps of the methods.

[0303] When the apparatus 2000 is used to implement the functions of the network device in the various method embodiments above, the transceiver unit 2010 is configured to transmit a first signal to a first terminal device using a first frequency resource; the transceiver unit 2010 is also configured to transmit a second signal with the first terminal device using a second frequency resource based on the first signal; wherein the first frequency resource and the second frequency resource are different frequency domain resources in a system bandwidth, and the subcarrier spacing of the first frequency resource is different from the subcarrier spacing of the second frequency resource.

[0304] The apparatus 2000 can implement the steps or procedures corresponding to those performed by the network device in the method embodiments according to the embodiments of the present application. The apparatus 2000 can include units for performing the steps of the methods. FIG. 9 to FIG. 19 The apparatus 2000 can implement the steps or procedures corresponding to those performed by the network device in the method embodiments according to the embodiments of the present application. The apparatus 2000 can include units for performing the steps of the methods.

[0305] For more details of the apparatus 2000, refer to the related description in the method embodiments above, which will not be repeated here.

[0306] It should also be understood that the apparatus 2000 herein is in the form of functional units. The term "unit" herein can refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (for example, a shared processor, a dedicated processor, or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combination logic circuit, and / or other suitable components that support the described functions. In an optional example, those skilled in the art can understand that the apparatus 2000 can be embodied as the terminal device in the above embodiments, and can be used to perform the procedures and / or steps corresponding to the terminal device in the various method embodiments above. To avoid repetition, details will not be repeated here.

[0307] The apparatus 2000 of each of the above schemes has the function of implementing the corresponding steps performed by the device (such as the terminal device or the network device) in the above methods. The functions can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions; for example, the transceiver unit can be replaced by a transceiver (for example, the transmitting unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as the processing unit, can be replaced by a processor, which performs the transceiver operation and related processing operation in each method embodiment.

[0308] Further, the transceiver unit 2010 can also be a transceiver circuit (e.g., can include a receiving circuit and a transmitting circuit), and the processing unit can be a processing circuit.

[0309] It should be noted that, FIG. 20 The apparatus in the above embodiments can be a network element or a device, or a chip or a chip system, such as a system on chip (SoC). The transceiver unit can be an input / output circuit or a communication interface, and the processing unit can be a processor or a microprocessor or an integrated circuit integrated on the chip. Herein, no limitation is made.

[0310] FIG. 21 FIG. 21 is a schematic block diagram of another communication apparatus provided by an embodiment of the present application. The apparatus 2100 includes a first module 2110 and a second module 2120.

[0311] The first module 2110, for example, can be a wake-up circuit or a module (e.g., a receiving module) of the wake-up circuit. The first module 2110 can be configured to perform operations performed by a wake-up circuit on the side of a communication device (e.g., a terminal device or a network device) in the above method embodiments, or configured to perform operations performed by the communication device (e.g., the terminal device or the network device) through a first link in the above method embodiments, or configured to perform operations performed by the communication device (e.g., the terminal device or the network device) when the communication device is in a first state in the above method embodiments, or configured to perform operations performed by the communication device (e.g., the terminal device or the network device) when the communication device is in a first mode in the above method embodiments. Herein, the terminal device is taken as an example for illustration.

[0312] The second module 2120, for example, can be a main circuit or a module (e.g., a receiving module) of the main circuit. The first module 2110 and the second module 2120 can be integrated together or separately arranged. The second module 2120 can be configured to perform operations performed by a main circuit on the side of a communication device (e.g., a terminal device or a network device) in the above method embodiments, or configured to perform operations performed by the communication device (e.g., the terminal device or the network device) through a second link in the above method embodiments, or configured to perform operations performed by the communication device (e.g., the terminal device or the network device) when the communication device is in a second state in the above method embodiments, or configured to perform operations performed by the communication device (e.g., the terminal device or the network device) when the communication device is in a second mode in the above method embodiments.

[0313] In one possible implementation, the terminal device receives a first signal from the network device using the first frequency resource via the first module 2110; and transmits a second signal to the network device using the second frequency resource via the second module 2110 based on the first signal. More details about the apparatus 2100 can be found in the descriptions of the corresponding method embodiments above, which will not be repeated here.

[0314] FIG. 22 is a schematic block diagram of yet another communication apparatus provided in the embodiments of the present application. The apparatus 2200 includes a processor 2210, and the processor 2210 is coupled with a memory 2220. The memory 2220 is configured to store computer programs or instructions and / or data. The processor 2210 is configured to execute the computer programs or instructions stored in the memory 2220, or read the data stored in the memory 2220, to perform the methods in the method embodiments above.

[0315] In some embodiments, the processor 2210 is one or more.

[0316] In some embodiments, the memory 2220 is one or more.

[0317] In some embodiments, the memory 2220 is integrated with the processor 2210, or is separately arranged.

[0318] In some embodiments, as shown in FIG. 22 the apparatus 2200 further includes a transceiver 2230 configured to receive and / or send signals. For example, the processor 2210 is configured to control the transceiver 2230 to receive and / or send signals.

[0319] As an implementation, the apparatus 2200 is configured to implement the operations performed by a device (e.g., a terminal device, or a network device) in the method embodiments above.

[0320] For example, the processor 2210 is configured to execute the computer programs or instructions stored in the memory 2220, to implement the operations of the network device in the method embodiments above.

[0321] For another example, the processor 2210 is configured to execute the computer programs or instructions stored in the memory 2220, to implement the operations of the terminal device in the method embodiments above.

[0322] It should be appreciated that the processor referenced in the embodiments of the present application can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic components, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0323] It should also be understood that the memory referenced in the embodiments of the present application can be a volatile memory and / or a non-volatile memory. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically EPROM (EEPROM) or a flash memory. The volatile memory can be a random access memory (RAM). For example, the RAM can be used as an external cache. As an example but not limitation, the RAM includes the following various forms: static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM) and direct memory bus random access memory (DRAM) (DRAM).

[0324] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic component, discrete hardware component, the memory (storage module) can be integrated in the processor.

[0325] It should also be noted that the memory described herein is intended to include, but not limited to, these and any other suitable types of memory.

[0326] The embodiments of the present application further provide a computer readable storage medium, which has stored computer instructions for implementing the method executed by the device (such as the terminal device or the network device) in each method embodiment.

[0327] For example, the computer program is executed by a computer, so that the computer can implement the method executed by the network device in each method embodiment.

[0328] For another example, the computer program is executed by a computer, so that the computer can implement the method executed by the terminal device in each method embodiment.

[0329] The embodiments of the present application further provide a computer program product, which contains instructions, and the instructions are executed by a computer to implement the method executed by the device (such as the terminal device or the network device) in each method embodiment.

[0330] The explanations and beneficial effects of the related contents in any of the above provided devices can refer to the corresponding method embodiments provided above, and will not be repeated here.

[0331] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0332] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable apparatus. For example, the computer can be a personal computer, a server, a network device, etc. The computer instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transferred from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) manner. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media sets. The available media can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD), etc. For example, the foregoing available media includes but is not limited to: a variety of media that can store program codes such as a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0333] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method of signal transmission, characterized by, The method comprises: The terminal device receives a wake-up signal from the network device using a first frequency resource; Based on the wake-up signal, the terminal device transmits a second signal to the network device using a second frequency resource; wherein the first frequency resource and the second frequency resource are different frequency domain resources in a system bandwidth, and the subcarrier spacing of the first frequency resource is different from the subcarrier spacing of the second frequency resource; The time for the terminal device to demodulate the wake-up signal using the first frequency resource is related to a preset time length, and the preset time length corresponds to the length of a cyclic prefix corresponding to the subcarrier spacing of the first frequency resource.

2. The method of claim 1, wherein, The method comprises: Starting from the starting time of each received symbol, after the preset time length, the terminal device demodulates the wake-up signal from the network device using the first frequency resource.

3. The method of claim 1 or 2, wherein: The preset time length is associated with any one of the following information: the frequency domain position of the first frequency resource, the subcarrier spacing of the first frequency resource, or the length of the cyclic prefix adopted by the bandwidth part (BWP) of the terminal device; Or, The method further comprises: the terminal device receiving the preset time length from the network device.

4. The method according to claim 1 or 2, characterized in that, The method comprises: The terminal device receives the wake-up signal from the network device using subcarriers in the first frequency resource except for N1 subcarriers, wherein the N1 subcarriers represent one or more subcarriers adjacent to the second frequency resource in the first frequency resource, and N1 is an integer greater than 1 or equal to 1.

5. The method according to claim 1 or 2, characterized in that, The method comprises: The terminal device transmits the second signal to the network device using subcarriers in the second frequency resource except for N2 subcarriers, wherein the N2 subcarriers represent one or more subcarriers adjacent to the first frequency resource in the second frequency resource, and N2 is an integer greater than 1 or equal to 1.

6. The method of claim 1 or 2, wherein, The frequency domain position of the first frequency resource is discontinuous.

7. The method according to claim 1 or 2, characterized in that, The frequency domain position of the first frequency resource comprises a first frequency domain position and a second frequency domain position, The method comprises: The terminal device receives part of the wake-up signal from the network device at the first frequency domain position, and receives the remaining part of the wake-up signal from the network device at the second frequency domain position; or At a first time, the terminal device receives the wake-up signal from the network device at the first frequency domain position, and at a second time, the terminal device receives the wake-up signal from the network device at the second frequency domain position.

8. The method of claim 1 or 2, wherein, The method further comprises: The terminal device receives configuration information of the first frequency resource using the second frequency resource.

9. A method of signal transmission, characterized by, The method is applied to a terminal device including a first module and a second module, and the method includes: The terminal device receives a wake-up signal from a network device using a first frequency resource through the first module; and based on the wake-up signal, the terminal device transmits a second signal to the network device using a second frequency resource through the second module; The first frequency resource and the second frequency resource are different frequency domain resources in a system bandwidth, and a subcarrier spacing of the first frequency resource is different from a subcarrier spacing of the second frequency resource. The terminal device demodulates the wake-up signal using the first frequency resource through the first module, and a time for demodulating the wake-up signal is related to a preset time length, and the preset time length corresponds to a length of a cyclic prefix of the subcarrier spacing of the first frequency resource.

10. The method of claim 9, wherein, The terminal device receives a wake-up signal from a network device using a first frequency resource through the first module, including: The terminal device demodulates the wake-up signal from the network device using the first frequency resource through the first module after the preset time length from a starting time of each received symbol.

11. The method of claim 9 or 10, wherein: The preset time length is associated with any one of the following: a frequency domain position of the first frequency resource, a subcarrier spacing of the first frequency resource, or a length of a cyclic prefix adopted by a bandwidth part (BWP) of the terminal device. Alternatively, The method further includes that the terminal device receives the preset time length from the network device.

12. The method of claim 9 or 10, wherein, The terminal device receives a wake-up signal from a network device using a first frequency resource through the first module, including: The terminal device receives the wake-up signal from the network device using subcarriers of the first frequency resource except for N1 subcarriers, and the N1 subcarriers represent one or more subcarriers of the first frequency resource adjacent to the second frequency resource, and N1 is an integer greater than 1 or equal to 1.

13. The method of claim 9 or 10, wherein, The terminal device transmits a second signal to the network device using a second frequency resource through the second module, including: The terminal device transmits the second signal to the network device using subcarriers of the second frequency resource except for N2 subcarriers, and the N2 subcarriers represent one or more subcarriers of the second frequency resource adjacent to the first frequency resource, and N2 is an integer greater than 1 or equal to 1.

14. The method of claim 9 or 10, wherein, The frequency domain position of the first frequency resource is discontinuous.

15. The method of claim 9 or 10, wherein, The frequency domain position of the first frequency resource includes a first frequency domain position and a second frequency domain position, The terminal device receives a wake-up signal from a network device using a first frequency resource through the first module, including: The terminal device receives part of the wake-up signal from the network device at the first frequency domain position through the first module, and the terminal device receives the remaining part of the wake-up signal from the network device at the second frequency domain position through the first module; or The terminal device receives the wake-up signal from the network device through the first module at a first time at the first frequency domain position, and receives the wake-up signal from the network device through the first module at a second time at the second frequency domain position.

16. The method of claim 9 or 10, wherein, The method further comprises: The terminal device receives configuration information of the first frequency resource through the second module using the second frequency resource.

17. The method of claim 16, wherein, The configuration information of the first frequency resource comprises one or more of the following information: The bandwidth of the first frequency resource, the frequency domain position of the first frequency resource, and the subcarrier spacing of the first frequency resource.

18. The method of claim 9 or 10, wherein, The wake-up signal is a signal obtained by multiplying a time domain signal by a window function.

19. A method of signal transmission, characterized by, The method comprises: The network device transmits a wake-up signal to a first terminal device using a first frequency resource; Based on the wake-up signal, the network device transmits a second signal to the first terminal device using a second frequency resource; The first frequency resource and the second frequency resource are different frequency domain resources in a system bandwidth, and the subcarrier spacing of the first frequency resource is different from the subcarrier spacing of the second frequency resource. The method further comprises: the network device transmits a preset time length to the first terminal device; or The preset time length is associated with any one of the following information: the frequency domain position of the first frequency resource, the subcarrier spacing of the first frequency resource, or the length of the cyclic prefix adopted by the bandwidth part (BWP) of the terminal device; The preset time length is used by the first terminal device to determine the time of demodulating the wake-up signal, and the length of the cyclic prefix corresponding to the subcarrier spacing of the first frequency resource is different.

20. The method of claim 19, wherein, The method further comprises: When the network device transmits the wake-up signal to the first terminal device using the first frequency resource, the network device transmits a signal to a second terminal device using the second frequency resource.

21. The method of claim 19 or 20, wherein, The network device transmits a wake-up signal to a first terminal device using a first frequency resource, comprising: The network device transmits a wake-up signal to a first terminal device using subcarriers in the first frequency resource except for N1 subcarriers, the N1 subcarriers representing one or more subcarriers in the first frequency resource adjacent to the second frequency resource, and N1 being an integer greater than 1 or equal to 1.

22. The method of claim 19 or 20, wherein, The network device transmits a second signal to the first terminal device using a second frequency resource, comprising: The network device transmits a second signal to the first terminal device using subcarriers in the second frequency resource except for N2 subcarriers, the N2 subcarriers representing one or more subcarriers in the second frequency resource adjacent to the first frequency resource, and N2 being an integer greater than 1 or equal to 1.

23. The method of claim 19 or 20, wherein, The wake-up signal is a signal obtained by multiplying a time domain signal by a window function.

24. The method of claim 19 or 20, wherein, The frequency domain position of the first frequency resource is discontinuous.

25. The method of claim 19 or 20, wherein, The frequency domain position of the first frequency resource comprises a first frequency domain position and a second frequency domain position, The network device transmits a wake-up signal to a first terminal device using a first frequency resource, comprising: The network device transmits part of the wake-up signal to the first terminal device at the first frequency domain location, and transmits the rest of the wake-up signal to the first terminal device at the second frequency domain location; or At a first time, the network device transmits the wake-up signal to the first terminal device at the first frequency domain location, and at a second time, the network device transmits the wake-up signal to the first terminal device at the second frequency domain location.

26. The method of claim 19 or 20, wherein, The method further comprises: The network device transmits configuration information of the first frequency resource to the first terminal device using the second frequency resource.

27. The method of claim 26, wherein, The configuration information of the first frequency resource comprises one or more of the following information: The bandwidth of the first frequency resource, the frequency domain location of the first frequency resource, and the subcarrier spacing of the first frequency resource.

28. An apparatus for signal transmission, the apparatus comprising: The apparatus comprises a module or unit for performing the method of any one of claims 1 to 27.

29. An apparatus for signal transmission, the apparatus comprising: The apparatus comprises a processor configured to execute computer programs or instructions stored in a memory to cause the apparatus to perform the method of any one of claims 1 to 27.

30. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer programs or instructions, which, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 27.

31. A computer program product, characterised in that, The computer program product comprises computer programs or instructions for performing the method of any one of claims 1 to 27.

32. A chip, comprising: The chip is coupled with a memory for reading and executing program instructions stored in the memory to implement the method of any one of claims 1 to 27. The chip is coupled with a memory for reading and executing program instructions stored in the memory to implement the method of any one of claims 1 to 27.

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