Signal transmission method and device

Abstract

The embodiment of the present application provides a method and device for signal transmission. The method may include: the transmitting end device uses at least a first frequency and a second frequency to modulate the information to be transmitted to generate a radio frequency signal, wherein the information to be transmitted is mapped on the target frequency, and the target frequency has an associated relationship with at least the first frequency and the second frequency; and sends the radio frequency signal. Through the present application, a suitable target frequency can be selected according to actual needs, which is suitable for more transmission scenarios and realizes the flexibility of signal transmission. For example, if the power consumption of the receiving end device is to be reduced, a smaller target frequency can be selected, which can not only meet the need to transmit signals on the radio frequency frequency, but also meet the requirement of reducing the power consumption of the receiving end by demodulating the signal on the target frequency with a smaller frequency. The method provided in this embodiment can be applied to communication systems such as 5G or NR, LTE, V2X, D2D, M2M, MTC, Internet of Things, etc.

Description

[0001] This application claims priority to a Chinese patent application filed with the China Patent Office on November 9, 2021, with application number 202111318765.6 and application name “A method for modulating a wake-up signal”, the entire contents of which are incorporated by reference in this application. Technical Field

[0002] Embodiments of the present application relate to the field of communications, and more specifically, to a method and device for signal transmission. Background Art

[0003] The terminal device can receive the wake-up signal through a separate low-power small circuit, such as a wake-up receiver (WUR), and the 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. At present, there is no solution to reveal the modulation method of the wake-up signal. Summary of the invention

[0004] The present application provides a signal transmission method and device, and designs a modulation method of a wake-up signal, which can meet the low power consumption requirements of WUR and improve spectrum efficiency.

[0005] In a first aspect, a method for signal transmission is provided, which can be executed by a sending device (such as a terminal device or a network device), or can also be executed by a component of the sending device (such as a chip or a circuit), without limitation.

[0006] The method may include: using at least a first frequency and a second frequency to modulate information to be transmitted to generate a radio frequency signal, wherein the information to be transmitted is mapped on a target frequency, and the target frequency has an associated relationship with at least the first frequency and the second frequency; and sending the radio frequency signal.

[0007] Based on the above technical solution, the transmitting device can map the information to be transmitted on the target frequency, and use at least two frequencies, such as the first frequency and the second frequency, to modulate the information to be transmitted, generate a radio frequency signal, and then send the radio frequency signal. By transmitting the above-mentioned at least two frequency signals within one symbol, and the information to be transmitted is mapped on the target frequency associated with the at least two frequencies, a suitable target frequency can be selected according to actual needs, which is suitable for more transmission scenarios and realizes the flexibility of signal transmission. For example, if you want to reduce the power consumption of the receiving device, you can choose a smaller target frequency, which not only meets the need to transmit signals on the radio frequency frequency, but also meets the requirement of reducing the power consumption of the receiving end by demodulating the signal on the target frequency with a smaller frequency.

[0008] In combination with the first aspect, in certain implementations of the first aspect, the target frequency, the first frequency, and the second frequency satisfy the following formula: ΔF=xF 1 +yF 2 , or, ΔF = xF 1 -yF 2 ; where ΔF represents the target frequency, F 1 Indicates the first frequency, F 2 represents the second frequency, where x and y are positive integers.

[0009] In combination with the first aspect, in some implementations of the first aspect, the target frequency is a frequency difference between the first frequency and the second frequency.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the first frequency satisfies any of the following: the first frequency is a default value; or, the first frequency is related to the frequency domain resources and / or time domain resources of the first link, and the first link is a link used to transmit radio frequency signals; or, the first frequency is configured by the network device.

[0011] Based on the above technical solution, the first frequency can be used as a reference frequency, and then the second frequency can be determined according to the first frequency and the target frequency, and the correlation between the three.

[0012] In combination with the first aspect, in some implementations of the first aspect, the second frequency is determined according to the target frequency and the first frequency.

[0013] In combination with the first aspect, in some implementations of the first aspect, the information to be transmitted is mapped to the target frequency according to a mapping relationship, and the mapping relationship is used to represent the relationship between the target frequency and the bits of the information to be transmitted.

[0014] In combination with the first aspect, in certain implementations of the first aspect, at least a first frequency and a second frequency are used to modulate the information to be transmitted, including: using a multi-frequency frequency shift keying modulation method or an orthogonal frequency division multiplexing modulation method, using at least a first frequency and a second frequency to modulate the information to be transmitted.

[0015] In combination with the first aspect, in certain implementations of the first aspect, before sending the radio frequency signal, the method also includes: sending one or more of the following information: frequency domain resources of the first link, time domain resources of the first link, frequency domain position of the target frequency, resolution of the target frequency, modulation order, frequency domain position of the first frequency, candidate frequency domain position of the second frequency; wherein the first link is a link used to transmit the radio frequency signal.

[0016] In combination with the first aspect, in certain implementations of the first aspect, the first frequency and the second frequency are located outside the following frequency domain positions: the lowest numbered N1 subcarriers and / or the highest numbered N2 subcarriers in the bandwidth used by the first link, the first link is a link used to transmit radio frequency signals, and N1 and N2 are integers greater than 1 or equal to 1.

[0017] Based on the above technical solution, when transmitting the wake-up signal on the first link, subcarriers other than the edge subcarriers (i.e., the lowest numbered N1 subcarriers and / or the highest numbered N2 subcarriers in the bandwidth used by the first link) are used to transmit the wake-up signal. In this way, the wake-up signal is not transmitted on the edge subcarriers in the bandwidth of the first link, and the edge subcarriers can be used as a protection interval between the wake-up signal and the data signal to reduce the subcarrier interference between the wake-up signal and the data signal.

[0018] In the second aspect, a method for signal transmission is provided, which can be executed by a receiving device (such as a terminal device or a network device), or can also be executed by a component of the receiving device (such as a chip or a circuit), without limitation.

[0019] The method may include: receiving a radio frequency signal, the radio frequency signal is generated by modulating information using at least a first frequency and a second frequency, the information is mapped on a target frequency, and the target frequency has an associated relationship with at least the first frequency and the second frequency; processing the radio frequency signal to determine the target frequency; and demodulating the signal on the target frequency to obtain information.

[0020] Based on the above technical solution, after the receiving device receives the RF signal, since the information is mapped on the target frequency, the target frequency can be determined, and then the signal on the target frequency can be demodulated to obtain the information mapped on the target frequency. By transmitting the above-mentioned at least two frequency signals within one symbol, and the information is mapped on the target frequency associated with the at least two frequencies, a suitable target frequency can be selected according to actual needs, which is suitable for more transmission scenarios and realizes the flexibility of signal transmission. For example, if you want to reduce the power consumption of the receiving device, you can choose a smaller target frequency, which not only meets the need to transmit signals on the RF frequency, but also the receiving device demodulates the signal on the target frequency with a smaller frequency, which can also meet the requirement of reducing the power consumption of the receiving end.

[0021] In conjunction with the second aspect, in certain implementations of the second aspect, the target frequency, the first frequency, and the second frequency satisfy the following formula: ΔF=xF 1 +yF 2 , or, ΔF = xF 1 -yF 2 ; where ΔF represents the target frequency, F 1 Indicates the first frequency, F2 represents the second frequency, where x and y are positive integers.

[0022] In combination with the second aspect, in some implementations of the second aspect, the target frequency is a frequency difference between the first frequency and the second frequency.

[0023] In combination with the second aspect, in certain implementations of the second aspect, the first frequency satisfies any of the following: the first frequency is a default value; or, the first frequency is related to the frequency domain resources and / or time domain resources of the first link, and the first link is a link used to transmit radio frequency signals; or, the first frequency is configured by the network device.

[0024] In combination with the second aspect, in certain implementations of the second aspect, demodulating the signal at the target frequency to obtain information includes: demodulating the signal at the target frequency to obtain information according to a mapping relationship, where the mapping relationship is used to represent the relationship between the target frequency and bits of information.

[0025] In combination with the second aspect, in some implementations of the second aspect, the modulation method of the radio frequency signal is a multi-frequency frequency shift keying modulation method or an orthogonal frequency division multiplexing modulation method.

[0026] In combination with the second aspect, in certain implementations of the second aspect, before receiving the radio frequency signal, the method also includes: receiving one or more of the following information: frequency domain resources of the first link, time domain resources of the first link, frequency domain position of the target frequency, resolution of the target frequency, modulation order, frequency domain position of the first frequency, and candidate frequency domain position of the second frequency; wherein the first link is a link used to transmit the radio frequency signal.

[0027] In combination with the second aspect, in certain implementations of the second aspect, the first frequency and the second frequency are located outside the following frequency domain positions: the lowest numbered N1 subcarriers and / or the highest numbered N2 subcarriers in the bandwidth used by the first link, the first link is a link used to transmit radio frequency signals, and N1 and N2 are integers greater than 1 or equal to 1.

[0028] The beneficial effects of the second aspect and each possible design can be referred to the relevant description of the first aspect and will not be elaborated here.

[0029] On the third aspect, a method for signal transmission is provided, which can be executed by a sending device (such as a terminal device or a network device), or can also be executed by a component of the sending device (such as a chip or a circuit), without limitation.

[0030] The method may include: determining the serial numbers of one or two subcarriers according to information to be transmitted; and mapping the information to be transmitted onto one or two subcarriers to obtain a frequency domain signal.

[0031] In combination with the third aspect, in certain implementations of the third aspect, the method also includes: sending one or more of the following information: frequency domain resources of the first link, positions of multiple subcarriers, frequency resolution, and modulation order; wherein the first link is a link used to transmit the transmit signal.

[0032] In combination with the third aspect, in certain implementations of the third aspect, the frequency domain resources of the first link include one or more of the following: the bandwidth used to transmit signals on the first link, the frequency position used to transmit signals on the first link, and the subcarrier spacing used to transmit signals on the first link.

[0033] In a fourth aspect, a communication device is provided, the device being used to execute the method in any possible implementation of the first to third aspects. Specifically, the device may include a unit and / or module, such as a processing unit and / or a communication unit, for executing the method in any possible implementation of the first to third aspects.

[0034] In one implementation, the apparatus is a communication device (e.g., a transmitting end device, or a receiving end device). When the apparatus is a communication device, the communication unit may be a transceiver, or an input / output interface; the processing unit may be at least one processor. Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0035] In another implementation, the device is a chip, a chip system or a circuit for a communication device (such as a transmitting device or a receiving device). When the device is a chip, a chip system or a circuit for a communication device, the communication unit may be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip, the chip system or the circuit; the processing unit may be at least one processor, a processing circuit or a logic circuit.

[0036] Optionally, the above-mentioned sending end device is a network device or a terminal device.

[0037] Optionally, the above-mentioned receiving device is a terminal device or a network device.

[0038] In a fifth aspect, a communication device is provided, the device comprising: at least one processor, configured to execute a computer program or instruction stored in a memory, so as to execute the method in any possible implementation of the first to third aspects above. Optionally, the device further comprises a memory, configured to store a computer program or instruction. Optionally, the device further comprises a communication interface, and the processor reads the computer program or instruction stored in the memory through the communication interface.

[0039] In one implementation, the apparatus is a communication device (such as a transmitting device or a receiving device).

[0040] In another implementation, the apparatus is a chip, a chip system or a circuit used in a communication device (such as a transmitting device or a receiving device).

[0041] Optionally, the above-mentioned sending end device is a network device or a terminal device.

[0042] Optionally, the above-mentioned receiving device is a terminal device or a network device.

[0043] In a sixth aspect, the present application provides a processor for executing the methods provided in the above aspects.

[0044] For the operations such as sending and acquiring / receiving involved in the processor, unless otherwise specified, or unless they conflict with their actual function or internal logic in the relevant description, they can be understood as operations such as processor output, reception, input, etc., or as sending and receiving operations performed by the radio frequency circuit and antenna, and this application does not limit this.

[0045] In a seventh aspect, a computer-readable storage medium is provided, which stores a program code for execution by a device, wherein the program code includes a method for executing any possible implementation of the first to third aspects above.

[0046] In an eighth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute a method in any possible implementation of the first to third aspects.

[0047] In a ninth aspect, a communication system is provided, comprising the aforementioned transmitting device and receiving device. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 is a schematic diagram of a wireless communication system 100 applicable to an embodiment of the present application.

[0049] Figure 2 It is a schematic diagram of the main circuit and wake-up circuit.

[0050] Figure 3 This is a waveform diagram of the signal when it uses OOK modulation.

[0051] Figure 4 This is a schematic diagram of the wake-up signal using FSK modulation.

[0052] Figure 5 It is a schematic diagram of a signal transmission method provided according to an embodiment of the present application.

[0053] Figure 6It is a schematic diagram of DT-FSK modulation provided according to an embodiment of the present application.

[0054] Figure 7 It is a schematic flowchart of a signal transmission method provided according to an embodiment of the present application.

[0055] Figure 8 It is a schematic diagram of a fourth-order DT-FSK modulation signal provided according to an embodiment of the present application.

[0056] Fig. 9 It is a schematic flowchart of a signal transmission method provided according to another embodiment of the present application.

[0057] Fig.10 It is a schematic diagram of a receiving end processing a signal according to an embodiment of the present application.

[0058] Fig.11 It is a schematic diagram of the time domain waveform and frequency domain components of the signal after square-rate detection.

[0059] Fig.12 It is a schematic diagram of using a low-pass filter to obtain a difference frequency signal applicable to an embodiment of the present application.

[0060] Fig.13 It is a schematic diagram of another signal transmission method provided according to an embodiment of the present application.

[0061] Fig.14 It is a schematic diagram of generating an FSK signal based on an OFDM transmitter according to an embodiment of the present application.

[0062] Fig.15 It is a schematic block diagram of a communication device provided in an embodiment of the present application.

[0063] Fig.16 It is a schematic block diagram of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0064] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0065] The technical solution provided in this application can be applied to various communication systems, such as: fifth generation (5th generation, 5G) or new radio (new radio, NR) system, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, etc. The technical solution provided in this application can also be applied to future communication systems, such as the sixth generation (6th generation, 6G) mobile communication system. The technical solution provided in this application can also be applied to device to device (device to device, D2D) communication, vehicle to everything (vehicle-to-everything, V2X) communication, machine to machine (machine to machine, M2M) communication, machine type communication (machine type communication, MTC), and Internet of things (Internet of things, IoT) communication system or other communication systems.

[0066] The terminal device in the embodiments of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.

[0067] The terminal device may be a device that provides voice / data to users, for example, a handheld device or a vehicle-mounted device with a wireless connection function. At present, some examples of terminals are: mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, wearable devices, terminal devices in 5G networks or future evolved public land mobile communication networks (public land mobile The embodiments of the present application do not limit this.

[0068] As an example but not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and fully or partially independent of smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.

[0069] In the embodiment of the present application, the device for realizing the function of the terminal device can be the terminal device, or it can be a device that can support the terminal device to realize the function, such as a chip system or a chip, which can be installed in the terminal device. In the embodiment of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0070] The network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be referred to as an access network device or a wireless access network device, such as a base station. The network device in the embodiment of the present application may refer to a wireless access network (RAN) node (or device) that connects a terminal device to a wireless network. A base station may broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmission point (TP), master station, auxiliary station, multi-standard wireless (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. A base station may 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 may also refer to a communication module, modem or chip used to be set in the aforementioned equipment or device. The base station may also be a mobile switching center and a device that performs the base station function in D2D, V2X, and M2M communications, a network-side device in a 6G network, and a device that performs the base station function in a future communication system. The base station may support networks with the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form used by the network equipment.

[0071] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0072] In some deployments, the network device mentioned in the embodiments of the present application may be a device including a CU, or a DU, or a device including a CU and a DU, or a control plane CU node (central unit of the control plane (central unit-control plane, CU-CP)) and a user plane CU node (central unit of the user plane (central unit-user plane, CU-UP)) and a DU node.

[0073] The network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons and satellites in the air. The embodiments of the present application do not limit the scenarios in which the network equipment and terminal equipment are located.

[0074] First combine Figure 1 The network architecture applicable to this application is briefly introduced as follows.

[0075] Figure 1 FIG. 1 is a schematic diagram of a wireless communication system 100 applicable to an embodiment of the present application. Figure 1 As shown, the wireless communication system 100 may include at least one network device, such as Figure 1 The wireless communication system 100 may further include at least one terminal device, such as Figure 1 The terminal device 120 shown in FIG. 1 is a terminal device 120. Both the network device and the terminal device may be configured with multiple antennas, and the network device and the terminal device may communicate using multiple antenna technology. The wireless communication system 100 may also support sidelink communication technology, and multiple terminal devices may communicate with each other using sidelink technology. Figure 1 not shown).

[0076] 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. Optionally, the network device 110 and the terminal device 120 form a single-cell communication system, and without loss of generality, the cell is recorded as cell #1. The network device 110 can be a network device in cell #1, or the network device 110 can serve a terminal device (such as terminal device 120) in cell #1.

[0077] It should be noted that a cell can be understood as an area within the coverage range of wireless signals of network equipment.

[0078] It should be understood that Figure 1 This is a simplified schematic diagram for ease of understanding only. The wireless communication system 100 may also include other network devices or other terminal devices. Figure 1 It should also be understood that the embodiments of the present application can be applied to any communication scenario in which a transmitting device and a receiving device communicate with each other.

[0079] In wireless communication systems, power saving of terminal devices is one of the important goals to be pursued. For example, the battery life of some terminal devices (such as mobile phones and wearable devices) affects the user experience; some terminal devices (such as wireless industrial sensors) are difficult to replace batteries, so when designing, it is hoped that such terminal devices can work for a longer time without changing batteries. Therefore, power saving of terminal devices is an aspect that needs to be considered in wireless communication technology.

[0080] In order to save power in terminal devices, in wireless communication systems, terminal devices are usually allowed to work in different modes according to different business needs. For example, when the terminal device needs to transmit data, it works in the connected state (or connected mode), at which time data is transmitted between the terminal device and the network device. When the terminal device works in the connected state, the power consumption is relatively high. For another example, when the terminal device does not need to transmit data, it works in the idle state, at which time the terminal device puts the circuit into a sleep state. For example, the terminal device can periodically detect whether there is data sent to itself. 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 relatively low.

[0081] In order to minimize power consumption in the idle state of the terminal device, the terminal device may include a main circuit and a wake-up circuit. The main circuit and the wake-up circuit are briefly introduced below.

[0082] 1. Wake-up circuit: also called wake-up receiver (WUR) or wake-up module, can be understood as a circuit used by the terminal device in idle state, or can be understood as a separate low-power small circuit. The low-power small circuit can be implemented using a separate small circuit or chip with a simple structure, and its power consumption is low. The signal received by the terminal device using the wake-up circuit can be called a wake-up signal (wake up signal / radio, WUS / WUR). It can be understood that the wake-up circuit is only named for distinction, and its specific naming does not limit the scope of protection of this application. For example, without loss of generality, the wake-up circuit can also be described as a first circuit (or first module).

[0083] The signal received by the terminal device using the wake-up circuit can be referred to as being transmitted on the wake-up link, wherein the wake-up link represents a connection relationship between the terminal device and the network device, which is a logical concept rather than a physical entity. It can be understood that the wake-up link is only a name for distinction, and its specific naming does not limit the scope of protection of this application. For the sake of generality, the wake-up link is described as the first link in the embodiment of this application. It should also be understood that the wake-up signal is only an example naming, and this application does not limit its naming.

[0084] 2. Main circuit: also known as main receiver or main module, it can be understood as the circuit used by the terminal device when transmitting data normally, or the circuit used by the terminal device when transmitting data in a connected state. When the terminal device uses the main circuit to transmit data, the power consumption is relatively large. It can be understood that the main circuit is only named for distinction, and its specific naming does not limit the scope of protection of this application. For example, without loss of generality, the main circuit can also be described as the second circuit (or second module). The following unified description is the main circuit.

[0085] The signal received by the terminal device using the main circuit can be said to be transmitted on the main link, where the main link represents a connection relationship between the terminal device and the network device, which is a logical concept rather than a physical entity. It can be understood that the main link is only a name for distinction, and its specific name does not limit the scope of protection of this application. For the sake of generality, the main link is described as the second link in the embodiment of this application.

[0086] In the following, for the convenience of description, the signal transmitted by the terminal device using the wake-up circuit is recorded as a wake-up signal, and the signal transmitted by the terminal device using the main circuit is recorded as a data signal.

[0087] As an example, Figure 2 A schematic diagram of the main circuit and the wake-up circuit is shown.

[0088] like Figure 2 As shown, the terminal device can receive (or detect) a wake-up signal through a wake-up circuit, and the terminal device can receive a data signal through the main circuit. Assume that the terminal device receives a wake-up signal through a wake-up circuit. If the terminal device does not detect a wake-up signal, the wake-up circuit continues to be used to receive the wake-up signal, and the main circuit can be in an off state (or a sleep state); if the terminal device detects a wake-up signal, the wake-up of the main circuit is triggered, that is, the main circuit is in / switched to an on state (or a working state, or an active state). After the main circuit is turned on, the terminal device can transmit data signals through the main circuit.

[0089] In order to ensure power consumption, the wake-up signal can be modulated by on-off keying (OOK) or frequency shift keying (FSK). The following briefly introduces these two modulation methods.

[0090] 1. OOK: Information is modulated by whether the signal is sent or not. The corresponding wake-up circuit can use the envelope detection method to receive the signal. OOK modulation technology can be demodulated with a receiver with very low complexity, so the low power consumption goal of the wake-up circuit can be achieved.

[0091] When the signal is modulated using OOK, each bit (ie, the encoded bit) may correspond to a symbol. Equivalently, a symbol may also be called a chip, or other names, which are not limited here.

[0092] For example, when a bit is 1, a signal is sent within the symbol length (i.e., the signal transmission power within the symbol length is not 0); when a bit is 0, no signal is sent within the symbol length (i.e., the signal transmission power within the symbol length is 0). Alternatively, it can be understood that in OOK modulation, if energy is sent, it represents "1", and if energy is not sent, it represents "0".

[0093] As an example, Figure 3 Figure 2 shows a waveform diagram of a signal using OOK modulation. Figure 3 As shown, Figure 3 The waveform shown can represent the four bits "0100". Figure 3 As shown, communication systems generally use a certain frequency to send signals, and the transmitted signal needs to be modulated on a carrier ( Figure 3 The sinusoidal signal in represents the carrier. At the receiving end, the receiving end detects the envelope (or energy) of the received signal and determines whether the transmitted symbol is "0" or "1", thereby completing demodulation.

[0094] When the wake-up signal adopts OOK modulation, the receiver has a simple structure and low power consumption, which can achieve the goal of power saving of the wake-up circuit. However, the transmission rate is low. Specifically, on the one hand, when the signal adopts OOK modulation, 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 adopts OOK modulation, each symbol carries 1 bit of information, and the time length of each symbol is long, the transmission rate will be very low.

[0095] 2. FSK: It is a modulation technology that modulates information on the carrier frequency.

[0096] As an example, Figure 4 FIG. 4 is a schematic diagram showing a case where the wake-up signal is modulated using FSK.

[0097] like Figure 4 As shown, assuming that the information bits to be transmitted are a sequence of 0 and 1, then one possible way is to send at a frequency of f. 1 The signal represents the transmission of bit "0" and the transmission frequency is f 2 The signal represents the transmitted bit "1". At the receiving end, a frequency discrimination circuit can be used to detect the received signal frequency. If the detected signal frequency is f 1 , then the received bit is judged to be 0; if the detected signal frequency is f 2 , then the received bit is judged to be 1.

[0098] Figure 4 The example shown can be called 2-FSK, that is, there are 2 modulation frequencies (i.e., f 1 and f 2 ), in which case one symbol carries one bit. However, FSK can be extended to carry more bits. For example, four different frequencies can be used for FSK modulation (4-FSK), so one symbol can carry 2 bits of information. 1 Represents the bit "00", f 2 Represents the bit "01", f 3 Represents bit "10", f 4 Represents bit "11".

[0099] FSK modulation can achieve a higher transmission rate than OOK, that is, when the wake-up signal is modulated by FSK, the transmission rate can be increased, but it is difficult to achieve the goal of power saving of the wake-up circuit. Specifically, when the wake-up signal is modulated by FSK, the receiving end needs to demodulate the frequency. Generally, mobile communications work at a certain RF frequency, which may be in the order of tens of megahertz (MHz) to several gigahertz (GHz). For example, in the above example, f 1 If the frequency is 2GHz, a demodulator circuit operating at 2GHz is required. The demodulator circuit operating at RF frequency will have higher power consumption and lower accuracy than the demodulator circuit operating at low frequency, which makes it difficult to achieve the goal of power saving in the wake-up circuit.

[0100] In view of this, the present application proposes a scheme for modulating signals, by transmitting two or more signals of different radio frequency frequencies within one symbol, and mapping the information to be transmitted on a target frequency associated with the different radio frequency frequencies (such as the frequency difference between the different radio frequency frequencies), so that it can not only be applied to communication systems, that is, using radio frequency frequencies to transmit signals, but also can select the target frequency of the mapped information according to actual needs. For example, if you want to reduce the power consumption of the receiving end, you can make the target frequency lower, so that through a certain receiver structure design, the frequency discrimination circuit can work at a lower target frequency, and thus can take into account both low power consumption and transmission rate.

[0101] It can be understood that the term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0102] It can also be understood that the “plurality” in this article may include 2 or more than 2.

[0103] The signal transmission method provided by the embodiment of the present application will be described in detail below with reference to the accompanying drawings. The embodiment provided by the present application can be applied to the above Figure 1 The network architecture shown is not limited.

[0104] Figure 5 is a schematic diagram of a signal transmission method 500 provided in an embodiment of the present application. The method 500 may include the following steps.

[0105] 510. The transmitting end device modulates the information to be transmitted using at least a first frequency and a second frequency to generate a radio frequency signal, wherein the information to be transmitted is mapped on a target frequency, and the target frequency is associated with at least the first frequency and the second frequency.

[0106] The first frequency and the second frequency may represent modulation frequencies, or may represent frequencies of two signals transmitted in one symbol. The following mainly uses the first frequency and the second frequency as examples for illustrative description, and the embodiments of the present application are not limited thereto. In the embodiments of the present application, two signals of different frequencies may be transmitted in one symbol, or more than two signals of different frequencies may be transmitted.

[0107] The target frequency refers to the frequency of the mapped information or data. The target frequency is different from the modulation frequency (ie, the at least two frequencies mentioned above). As an example, the target frequency is less than the modulation frequency.

[0108] As an example, the sending end device may be a network device, or may also be a terminal device.

[0109] 520, the transmitting end device sends a radio frequency signal.

[0110] Correspondingly, the receiving end device receives the radio frequency signal. As an example, the receiving end device may be a network device, or may also be a terminal device.

[0111] The RF signal may be, for example, a wake-up signal. Assuming that the transmitting end device is a network device and the receiving end device is a terminal device, in step 520, the network device sends a wake-up signal to the terminal device, and accordingly, the terminal device receives the wake-up signal, such as the terminal device receives the wake-up signal through the first module or the terminal device receives the wake-up signal on the first link.

[0112] In an embodiment of the present application, the transmitting device can map the information to be transmitted on the target frequency, and use at least two frequencies, such as a first frequency and a second frequency, to modulate the information to be transmitted, generate a radio frequency signal, and then send the radio frequency signal. By transmitting the above-mentioned at least two frequency signals within one symbol, and the information to be transmitted is mapped on the target frequency associated with the at least two frequencies, a suitable target frequency can be selected according to actual needs, which is suitable for more transmission scenarios and realizes the flexibility of transmitting signals. For example, if you want to reduce the power consumption of the receiving device, you can choose a smaller target frequency, which not only meets the need to transmit signals on the radio frequency frequency, but also meets the requirement of reducing the power consumption of the receiving end by demodulating the signal on the target frequency with a smaller frequency.

[0113] As described in step 510, the target frequency is associated with at least the first frequency and the second frequency. The target frequency is associated with at least the first frequency and the second frequency, which can indicate that the target frequency is related to the modulation frequency, so that the target frequency can be determined by the association between the target frequency and the modulation frequency, and then the information on the target frequency can be adjusted; or the remaining modulation frequency can be determined according to the target frequency and part of the modulation frequency, and then the modulation frequency can be used to generate a radio frequency signal. Taking the first frequency and the second frequency as an example, optionally, the target frequency, the first frequency, and the second frequency satisfy Formula 1.

[0114] ΔF=f(F 1 ,F 2 ) Formula 1

[0115] Where f represents the function, ΔF represents the target frequency, and F 1 Indicates the first frequency, F 2 represents the second frequency. There is no restriction on the function f. The above formula 1 may be predefined by a standard or configured by the network side. If configured by the network side, the network side may send formula 1 to the terminal device.

[0116] A possible design, the above equation 1 can be expressed as: ΔF = f(F 1 ,F 2 )=xF 1 +yF 2 , or, ΔF = f(F 1 ,F 2 )=xF 1 -yF 2 . Where x and y are positive integers.

[0117] In another possible design, the target frequency is the frequency difference between the first frequency and the second frequency. Taking the above formula 1 as an example, formula 1 can be expressed as: ΔF = f(F 1 ,F 2 )=F 1 -F 2 , or, ΔF = f(F 1 ,F 2 )=F 2 -F 1 .

[0118] In another possible design, the target frequency is the absolute value of the frequency difference between the first frequency and the second frequency. Taking the above formula 1 as an example, formula 1 can be expressed as: ΔF = f(F 1 ,F 2 )=|F 1 -F 2 |.

[0119] It should be understood that the above mainly uses the first frequency and the second frequency as examples for exemplary description, and the embodiments of the present application are not limited thereto. As an example, assuming that the modulation frequency includes: the first frequency F 1 , the second frequency F 2 , the third frequency F 3 , then the relationship between the target frequency and the modulation frequency can be expressed as: ΔF = f(F 1 ,F 2 ,F 3 ). For example, ΔF=f(F 1 ,F 2 ,F 3 )=xF 1 +yF 2 +zF 3 ; For another example, ΔF=f(F 1 ,F 2 ,F 3 )=xF 1 -yF 2 -zF 3 . Where z is a positive integer.

[0120] Optionally, the first frequency satisfies any of the following: the first frequency is a default value; or, the first frequency is related to the frequency domain resources and / or time domain resources of the first link, and the first link is a link used to transmit radio frequency signals; or, the first frequency is configured by the network device. Several possible scenarios are described below.

[0121] As a first possible situation, the first frequency is the default value, that is, F 1 =F.

[0122] In this case, the first frequency may be a fixed value F (or a default value F). F may be predefined by a standard or configured by the network side. If configured by the network side, the network side may send the configured F to the terminal device.

[0123] As a second possible scenario, the first frequency is related to frequency domain resources of the first link.

[0124] For example, the frequency domain resources of the first frequency and the first link satisfy Equation 2.

[0125] F 1 =f(F c ) Formula 2

[0126] Where f represents a function, F 1 Indicates the first frequency, F c Indicates the frequency domain resources of the first link, such as the carrier frequency. The above formula 2 may be predefined by the standard or configured by the network side. If configured by the network side, the network side may send formula 2 to the terminal device.

[0127] It should be noted that, in the embodiments of the present application, for ease of description, functions are all represented by f, but the functions represented by f are not limited to be the same. For example, in the above formula 1 and formula 2, functions are both represented by f, which does not limit the function f in formula 1 and formula 2 to be the same, and this will not be repeated below.

[0128] As an example, Formula 2 may be: 1 =f(F c )=F c +α1, α1 is a constant, such as α1 is 1MHz. α1 may be predefined by the standard or configured by the network side. If configured by the network side, the network side may send the configured α1 to the terminal device.

[0129] It can be understood that the above is an exemplary description and the present application is not limited thereto. For example, the subcarrier used by the first frequency is the subcarrier with the lowest number of the first link. For another example, the subcarrier used by the first frequency is the subcarrier with the highest number of the first link. For another example, the subcarrier used by the first frequency is the central subcarrier of the first link. For another example, the subcarrier used by the first frequency is the subcarrier numbered N of the first link, and N may be predefined by the standard or configured by the network side and sent to the terminal device.

[0130] As a third possible scenario, the first frequency is related to the time domain resources of the first link.

[0131] For example, the time domain resources of the first frequency and the first link satisfy Formula 3.

[0132] F 1 =f(t) Equation 3

[0133] Where f represents a function, F 1 represents the first frequency, and t represents the time domain resource of the first link, such as a symbol. The above formula 3 can be predefined by the standard or configured by the network side. If configured by the network side, the network side can send formula 3 to the terminal device.

[0134] In this case, the first frequency may vary with time, for example, determined according to a sequence that jumps with time. As an example, Formula 3 may be: 1 =f(t)=t+α2, where α2 is a constant and t is a variable. For example, in symbol 1, F 1 =α2+1MHz; in symbol 2, F 1 =α2+2MHz, etc. α2 may be predefined by the standard or configured by the network side. If configured by the network side, the network side may send the configured α2 to the terminal device.

[0135] As a fourth possible scenario, the first frequency is related to the time domain resources of the first link and the frequency domain resources of the first link.

[0136] For example, the first frequency, the time domain resources of the first link, and the frequency domain resources of the first link satisfy Formula 4.

[0137] F 1 =f(t,F c ) Formula 4

[0138] For the meaning of each parameter, refer to the above description. The above formula 4 can be predefined by the standard or configured by the network side. If configured by the network side, the network side can send formula 4 to the terminal device.

[0139] In this case, the first frequency may vary over time and be related to the frequency domain resources of the first link.

[0140] For example, Formula 4 can be: 1 =f(t,F c )=F c +f(t), where f(t) represents a time-dependent function. For example, in symbol 1, F 1 =F c +1MHz; in symbol 2, F 1 =F c +2MHz and so on.

[0141] The first frequency is mainly introduced above in combination with several possible situations. It can be understood that the second frequency can also be applied to the above-mentioned situations, and there is no limitation to this.

[0142] Optionally, the method 500 further includes: the transmitting end device determines two frequencies that need to be modulated.

[0143] In a possible design, the second frequency is determined according to the target frequency and the first frequency. For example, the transmitting end device may determine the first frequency; and determine the second frequency according to the target frequency and the first frequency, and the association between the target frequency and the first frequency and the second frequency. The size of the target frequency may be predefined by the protocol, or may be configured by the network side, without limitation. The size of the first frequency may be determined according to the above-mentioned situations.

[0144] For example, the target frequency is the frequency difference between the first frequency and the second frequency, then: the second frequency=target frequency+first frequency, or, the second frequency=first frequency-target frequency.

[0145] Optionally, in step 510, the transmitting device uses at least a first frequency and a second frequency to modulate the information to be transmitted, including: the transmitting device uses at least a first frequency and a second frequency to modulate the information to be transmitted by using a multi-frequency frequency shift keying modulation method or an orthogonal frequency division multiplexing modulation method.

[0146] For example, using at least a first frequency and a second frequency to modulate the information to be transmitted includes: using at least a first frequency and a second frequency to modulate the information to be transmitted by a multi-frequency frequency shift keying modulation method.

[0147] Among them, multi-frequency frequency shift keying, for example, can be dual tone-frequency shift keying (DT-FSK), which can be understood as an improved FSK. For example, the modulation method of FSK is: a signal of one frequency is transmitted in one symbol, and the information to be transmitted is modulated by the frequency; the modulation method of multi-frequency frequency shift keying (such as DT-FSK) is: two or more signals of different frequencies are transmitted in one symbol, and the information to be transmitted is modulated by the target frequency associated with two or more different frequencies. It can be understood that multi-frequency frequency shift keying (such as DT-FSK) is only a name made for distinction, and its naming does not limit the scope of protection of the embodiments of the present application.

[0148] For another example, at least a first frequency and a second frequency are used to modulate the information to be transmitted, including: using an orthogonal frequency division multiplexing modulation method to modulate the information to be transmitted using at least a first frequency and a second frequency. Using an orthogonal frequency division multiplexing modulation method to modulate the wake-up signal using at least a first frequency and a second frequency, it can be understood that, for the transmitting device, a radio frequency signal is sent on at least two selected subcarriers (i.e., at least one example of the first frequency and the second frequency), and "0" can be sent on other subcarriers, that is, no energy is sent. It can be understood that the orthogonal frequency division multiplexing modulation method limits the modulation method of the transmitting device, but does not limit the demodulation method of the receiving device. For example, when the transmitting device sends a radio frequency signal, the radio frequency signal is sent on two selected subcarriers, and the information is mapped on the target subcarrier associated with the two subcarriers (i.e., an example of the target frequency), and "0" can be sent on other subcarriers, that is, no energy is sent; after receiving the signal, the receiving end determines the target subcarrier and demodulates the target subcarrier to obtain the information on the target subcarrier. The above is an exemplary description, and the following is combined with Fig. 9 Provide detailed explanation.

[0149] Optionally, the information to be transmitted is mapped to the target frequency according to a mapping relationship.

[0150] The mapping relationship is used to represent the relationship between the target frequency and the bits of the information to be transmitted. The mapping relationship 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 mapping relationship to the terminal device.

[0151] As a first possible form, the mapping relationship may exist in the form of Table 1.

[0152] Table 1

[0153] Bits to be transmitted Target frequency ΔF (unit: MHz) 00 1 01 2 10 3 11 4

[0154] Taking Table 1 as an example, assuming that the bit string to be transmitted is 10101101, every two consecutive bits are mapped to a target frequency. According to Table 1, the 1st to 2nd bits "10" are mapped to the target frequency ΔF = 3MHz, the 3rd to 4th bits "10" are mapped to the target frequency ΔF = 3MHz, the 5th to 6th bits "11" are mapped to the target frequency ΔF = 4MHz, and the 7th to 8th bits "01" are mapped to the target frequency ΔF = 2MHz.

[0155] As a second possible form, the mapping relationship may exist in the form of Table 2.

[0156] The difference between Table 2 and Table 1 is that the target frequency in Table 1 is in MHz, and the target frequency in Table 2 is in subcarriers. For example, the target frequency ΔF=2x4=8 in Table 2 indicates that the frequency domain position of the target frequency is subcarrier 8, and the "8" indicates the subcarrier number (or index, or serial number).

[0157] Table 2

[0158] Bits to be transmitted Target frequency ΔF (in subcarrier units) 000 1x4 001 2x4 010 3x4 011 4x4 100 5x4 101 6x4 110 7x4 111 8x4

[0159] Taking Table 2 as an example, assuming that the bit string to be transmitted is 000111101, the 1st to 3rd bits "000" are mapped to the target frequency ΔF=1x4=4 (that is, the frequency domain position of the target frequency is subcarrier 4), the 4th to 6th bits "111" are mapped to the target frequency ΔF=8x4=32 (that is, the frequency domain position of the target frequency is subcarrier 32), and the 7th to 9th bits "101" are mapped to the target frequency ΔF=6x4=24 (that is, the frequency domain position of the target frequency is subcarrier 24).

[0160] It should be understood that the above Table 1 or Table 2 is only an exemplary description and is not limited thereto. Any variation of Table 1 or Table 2 is applicable to the present application. For example, the target frequency ΔF in Table 1 or Table 2 can also be replaced by the first frequency and the second frequency. For another example, the number of values ​​of the target frequency can be more, so that the amount of bits to be transmitted can also be more.

[0161] Optionally, the method 500 further includes: the receiving end device receives parameter information of the first link. Accordingly, the transmitting end device sends the parameter information of the first link to the receiving end device. It can be understood that the parameter information of the first link can also be predefined by a standard.

[0162] The parameter information of the first link may indicate parameter information related to the first link, or may indicate parameter information related to transmitting a wake-up signal on the first link.

[0163] As an example, the parameter information of the first link may include one or more of the following information: frequency domain resources of the first link, time domain resources of the first link, frequency domain position of the target frequency, resolution of the target frequency, modulation order, frequency domain position of the first frequency, and candidate frequency domain position of the second frequency. The following briefly introduces each information.

[0164] 1) Frequency domain resources of the first link: that is, frequency domain resources allocated to the first link, or frequency domain resources that can be used by the wake-up signal.

[0165] As an example, the frequency domain resources of the first link may include, but are not limited to, one or more of the following: the bandwidth used to transmit the signal on the first link, the frequency domain position used to transmit the signal on the first link, and the subcarrier spacing used to transmit the signal on the first link. For example, the frequency domain position used to transmit the signal on the first link may include one or more of the following: the starting frequency position, the center frequency position, and the ending frequency position. For another example, the frequency domain position used to transmit the signal on the first link may include the position of the resource block (RB), such as the starting position of the RB and the number of RBs.

[0166] As an example, Figure 6 Schematic diagram of DT-FSK modulation provided according to an embodiment of the present application. Figure 6 As shown, the bandwidth used to transmit the signal on the first link is the width of 3 physical resource blocks (PRBs). One PRB can be composed of 12 subcarriers, that is, the frequency domain resources used to transmit the signal on the first link are 36 subcarriers. The frequency domain position used to transmit the signal on the first link may include, for example, the distance of the spectrum used by the first link from the starting frequency of the system bandwidth, such as 100 PRBs.

[0167] 2) Time domain resources of the first link: indicates the time domain resources allocated to the first link, or indicates the time when the wake-up signal can be detected. For example, the frequency domain resources allocated to the first link can be used on the time domain resources. For example, in every 10ms, within the first 2ms, the above 3 PRBs are used to receive the wake-up signal, and in the rest of the time, the 3 PRBs can be used for other services.

[0168] 3) Modulation order: It indicates the modulation order. For example, if the modulation order is M, the bit string of the information to be transmitted can be mapped to 1 target frequency according to every N bits, where N = log 2 M.

[0169] 4) The frequency domain position of the first frequency: for example, it may include the position of the RB where the first frequency is located and the subcarrier number of the first frequency in the RB. Figure 6 For example, the frequency domain position of the first frequency may be subcarrier 1, for example.

[0170] 5) Candidate frequency domain position of the second frequency: indicates the possible frequency domain position of the second frequency. For example, when transmitting a signal, part of the frequency in the candidate frequency domain position can be used as the modulation frequency. Figure 6 For example, Figure 6 As shown in (b), the black-filled subcarriers (i.e., subcarriers 5, 9, 13, 17, 21, 25, 29, 33) represent candidate frequency domain positions of the second frequency.

[0171] 6) Frequency domain position of the target frequency: that is, the frequency difference between two adjacent target frequencies. Figure 6 For example, as an example, the resolution of the target frequency can be, for example, the interval between subcarriers filled with black, that is, the resolution of the target frequency is 4 subcarriers. If the subcarrier bandwidth is 30kHz, the resolution of the target frequency is 4×30=120kHz.

[0172] Optionally, the first frequency and the second frequency are located outside the following frequency domain positions: the lowest numbered N1 subcarriers and / or the highest numbered N2 subcarriers in the bandwidth used by the first link, where N1 and N2 are integers greater than 1 or equal to 1.

[0173] Among them, the lowest numbered N1 subcarriers and / or the highest numbered N2 subcarriers in the bandwidth used by the first link can be called edge frequency domain positions, or edge subcarriers, or protection subcarriers. For ease of description, the following description takes edge subcarriers as an example.

[0174] The first frequency and the second frequency are located outside the edge subcarriers (such as N1 subcarriers and N2 subcarriers) in the bandwidth used by the first link, which can be replaced by the first frequency and the second frequency being located at the middle subcarriers in the bandwidth used by the first link, for example, the first frequency and the second frequency are located at the middle N3 subcarriers in the bandwidth used by the first link, N3 is an integer greater than 1 or equal to 1, and N3 is less than the total number of subcarriers in the bandwidth used by the first link. As an example, N1 can be 1 or 2, for example. As an example, N2 can be 1 or 2, for example.

[0175] Based on the above method, when transmitting the wake-up signal on the first link, the subcarriers other than the edge subcarriers are used to transmit the wake-up signal. In this way, the wake-up signal is not transmitted on the edge subcarriers in the bandwidth of the first link, and the edge subcarriers can be used as a protection interval between the wake-up signal and the data signal to reduce the subcarrier interference between the wake-up signal and the data signal.

[0176] For example, guard subcarriers are set on both sides of the bandwidth allocated to the first link, that is, when the wake-up signal is transmitted on the first link, subcarriers other than N1 subcarriers and N2 subcarriers are used to transmit the wake-up signal. Figure 6 For example, the bandwidth used to transmit the signal on the first link is 3 PRBs, corresponding to 36 subcarriers, among which subcarrier 0, subcarrier 34, and subcarrier 35 located at the edge can be used as protection subcarriers, that is, the first frequency and the second frequency can be located in subcarriers 0-35, except subcarrier 0, subcarrier 34, and subcarrier 35.

[0177] For ease of understanding, the following example takes the target frequency as the frequency difference between the first frequency and the second frequency and the modulation method as DT-FSK. Figure 7 and Fig. 9 , introduces a possible process applicable to the embodiment of the present application. The steps or terms involved can be specifically referred to in the above description.

[0178] Figure 7 FIG. 1 is a schematic flow chart of a signal transmission method according to an embodiment of the present application. Figure 7 As shown, method 700 includes the following steps.

[0179] 710. The transmitting device maps the information to be transmitted to the target frequency.

[0180] The target frequency may be, for example, a frequency difference between the first frequency and the second frequency.

[0181] According to the order M of DT-FSK modulation, every N bits in the bit string of the information to be transmitted are mapped to a target frequency, where N = log 2 M. For example, assuming that the fourth-order DT-FSK is used for modulation in the present embodiment, then two bits (N = log 2 4=2) is mapped to a target frequency. The fourth-order DT-FSK can have 4 optional target frequencies.

[0182] Optionally, the information to be transmitted is mapped to the target frequency according to the mapping relationship. As an example, the mapping relationship may be in the form of Table 1. For the mapping relationship, reference may be made to the above description, which will not be repeated here.

[0183] 720. The transmitting end device determines two frequencies that need to be modulated according to the target frequency.

[0184] Among them, the two frequencies that need to be modulated are the first frequency F 1 and the second frequency F 2 .

[0185] Optionally, the first frequency satisfies any of the following formulas: F1 =F, F 1 =f(F c ), F 1 =f(t),F 1 =f(t,F c ). For each formula, refer to the above description.

[0186] In step 720, the transmitting end device determines two frequencies to be modulated according to the target frequency, which may include: the transmitting end device determines the first frequency according to any of the above items, and determines the second frequency according to the target frequency and the first frequency. For example, the second frequency = target frequency + first frequency, or the second frequency = first frequency - target frequency.

[0187] As an example, Figure 8 It is a schematic diagram of a fourth-order DT-FSK modulation signal provided according to an embodiment of the present application. Assuming that the bit string to be transmitted is 10111101, every two consecutive bits can be mapped to a target frequency according to the mapping relationship in Table 1, where the target frequency = the first frequency - the second frequency, and the carrier frequency of the first link is F c , the first frequency can be: F c +1MHz.

[0188] like Figure 8 As shown, for example, in symbol 0, the 1st to 2nd bits "10" can be mapped to the target frequency ΔF=3MHz according to Table 1, and the second frequency=first frequency+3MHz. In symbol 1, the 3rd to 4th bits "11" can be mapped to the target frequency ΔF=4MHz according to Table 1, and the second frequency=first frequency+4MHz. In symbol 2, the 5th to 6th bits "11" can be mapped to the target frequency ΔF=4MHz according to Table 1, and the second frequency=first frequency+4MHz. In symbol 3, the 7th to 8th bits "01" can be mapped to the target frequency ΔF=2MHz according to Table 1, and the second frequency=first frequency+2MHz.

[0189] 730. The transmitting end device generates a transmission signal according to two frequencies that need to be modulated.

[0190] The transmission signal may be composed of the two modulated frequencies determined in step 720. As an example, the transmission signal satisfies equation 5.

[0191] x(t)=sin(2πF 1 t)+sin(2πF 2 t) Formula 5

[0192] Among them, x(t) represents the transmitted symbol, F 1 represents the first frequency, t represents time, F 2 Indicates the second frequency.

[0193] Based on the above scheme, compared to the OOK modulation technology in which each symbol carries 1 bit of information, the DT-FSK modulation technology can carry 2 bits or more of information per symbol. As an example, the amount of bits carried by each symbol can be determined based on the number of values ​​of the target frequency. For example, assuming that there are 4 values ​​of the target frequency, each symbol can carry 2 bits of information, and the 4 target frequencies carry: bit "00", bit "01", bit "10", and bit "11" respectively; for another example, assuming that there are 8 values ​​of the target frequency, each symbol can carry 3 bits of information, and the 8 target frequencies carry: bit "000", bit "001", bit "010", bit "011", bit "100", bit "101", bit "110", and bit "111". Therefore, the DT-FSK modulation technology provided in the embodiment of the present application can improve the transmission rate. In addition, compared with traditional FSK, the DT-FSK modulation technology can be received using a low-power receiver. The specific analysis will be combined later. Fig.10 Detailed description.

[0194] Fig. 9 FIG. 1 is a schematic flow chart of a signal transmission method provided according to another embodiment of the present application. Fig. 9 In the embodiment shown, the DT-FSK modulation technique can be implemented by combining it with the orthogonal frequency division multiplexing (OFDM) technique. Fig. 9 As shown, method 900 includes the following steps.

[0195] 910. The transmitting end device determines parameter information of the first link.

[0196] The parameter information of the first link may be predefined by a standard or configured by the network side. If configured by the network side, the network side may send the parameter information of the first link to the terminal device.

[0197] For the parameter information of the first link, please refer to the previous description, which will not be repeated here.

[0198] 920, the transmitting device maps the information to be transmitted to the target frequency.

[0199] The target frequency may be, for example, a frequency difference between the first frequency and the second frequency.

[0200] According to the order M of DT-FSK modulation, the bit string of the information to be transmitted is mapped to a target frequency every N bits, where N = log 2 M. Figure 6For example, there are 8 candidate frequency domain positions for the second frequency (i.e., subcarriers 5, 9, 13, 17, 21, 25, 29, 33), so the modulation order is 8, then each N = log 2 8=3 bits are mapped to 1 target frequency.

[0201] Optionally, the information to be transmitted is mapped to the target frequency according to the mapping relationship. In this embodiment, the target frequency may be in units of subcarriers, so the mapping relationship may exist in the form of Table 2. For the mapping relationship, reference may be made to the above description, which will not be repeated here.

[0202] 930. The transmitting end device determines two subcarriers that need to be modulated according to the target frequency.

[0203] Among them, the two frequencies that need to be modulated are the first frequency F 1 and the second frequency F 2 .

[0204] Optionally, the first frequency satisfies any of the following formulas: F 1 =F, F 1 =f(F c ), F 1 =f(t),F 1 =f(t,F c ).by Figure 6 For example, the first frequency is related to the frequency domain resources of the first link, such as the subcarrier used by the first frequency is subcarrier 1.

[0205] by Figure 6 For example, assuming that the bit string to be transmitted is 000111101, the target frequency = first frequency - second frequency. Figure 6 As shown in (a), in symbol 0, the 1st to 3rd bits "000" can be mapped to the target frequency ΔF=1x4=4 according to Table 2, and the second frequency=the first frequency+4=5, that is, the frequency domain position of the second frequency is subcarrier 5. In symbol 1, the 4th to 6th bits "111" can be mapped to the target frequency ΔF=8x4=32 according to Table 2, and the second frequency=the first frequency+32=33, that is, the frequency domain position of the second frequency is subcarrier 33. In symbol 2, the 7th to 9th bits "101" can be mapped to the target frequency ΔF=6x4=24 according to Table 2, and the second frequency=the first frequency+24, that is, the frequency domain position of the second frequency is subcarrier 25.

[0206] 940. The transmitting end device generates a transmission signal according to two subcarriers that need to be modulated.

[0207] In step 940, two frequency modulation signals may be generated according to the two frequencies to be modulated determined in step 930, and the two frequencies may be superimposed to generate a DT-FSK signal.

[0208] In an embodiment of the present application, a DT-FSK signal can be generated based on an OFDM transmitter. Specifically, an OFDM transmitter is used to modulate the signal, a signal is sent on two selected subcarriers, "0" is sent on other subcarriers, and then a fast Fourier transform (FFT) is used to implement signal modulation. The transmitted signal is a DT-FSK signal, or it can be understood as an OFDM signal modulated with two subcarriers.

[0209] Assuming that in an OFDM system, in general, the transmission power of a subcarrier is P 1 , then the transmit power P of each subcarrier used to transmit the wake-up signal wur,sc It can be calculated by formula 6.

[0210]

[0211] Among them, N sc Indicates the number of subcarriers contained in each PRB, for example, 12. N wur,RB Indicates the number of RBs allocated to the first link, N wur,sc is the number of subcarriers actually modulated by the wake-up signal. Figure 6 For example, the number of PRBs allocated to the first link is 3, then N sc N wur,RB = 36 subcarriers. In actual transmission, each symbol contains N wur,RB =2 subcarriers to transmit the wake-up signal, so under the condition that the total transmission power remains unchanged, the transmission power of each of the two subcarriers can be 18 times the transmission power of one subcarrier under normal circumstances. wur,sc Equation 7 can be satisfied.

[0212]

[0213] Based on the above scheme, compared to OOK modulation technology in which each symbol carries 1 bit of information, DT-FSK modulation technology can carry 2 bits or more of information per symbol. As an example, the number of bits carried by each symbol can be determined based on the number of values ​​of the target frequency. For details, please refer to the previous related description. Therefore, the DT-FSK modulation technology provided in the embodiment of the present application can improve the transmission rate. In addition, compared to traditional FSK, DT-FSK modulation technology can use a low-power receiver for reception. The specific analysis will be combined later. Fig.10In addition, in the embodiment of the present application, a DT-FSK signal can be generated based on an OFDM transmitter, so that the transmitter can multiplex the OFDM transmitter of the main link to implement DT-FSK modulation of the wake-up signal on the wake-up link.

[0214] Combined with the above Figure 7 and 9 The modulation and transmission of the wake-up signal are introduced. The following takes the target frequency as the frequency difference between the first frequency and the second frequency as an example, and introduces the demodulation of the receiving end in combination with 10.

[0215] Fig.10 It is a schematic diagram of a receiving end processing a signal according to an embodiment of the present application.

[0216] like Fig.10 As shown, the processing process at the receiving end may include steps.

[0217] 1) Perform a bandpass filter on the signal received by the antenna to filter out the signal on the channel that transmits the wake-up signal.

[0218] 2) A low noise amplifier (LNA) is used to amplify the power of the output signal of the filter.

[0219] 3) Perform square law detection on the amplified signal. The square law detection mainly utilizes the nonlinear characteristics of the device to make the output signal of the circuit contain the high-order power components of the input signal.

[0220] For example, the relationship between the input signal and the output signal after the square-law detection process can satisfy Equation 8.

[0221] y(t)=ax(t)+bx 2 (t) Equation 8

[0222] Among them, x(t) represents the input signal, a and b represent positive real numbers, and y(t) represents the output signal. It can be seen from Formula 8 that the output signal contains the quadratic component of the input signal, that is, bx 2 (t).

[0223] In the embodiment of the present application, the DT-FSK signal contains two frequency components, as shown in the above formula 5, that is, x(t)=sin(2πF 1 t)+sin(2πF 2 t). Therefore, the above formula 8 can be transformed into formula 9.

[0224] y(t)=ax(t)+bx 2 (t) = a[sin(2πF 1t)+sin(2πF 2 t)]+b[sin(2πF 1 t)+sin(2πF 2 t)] 2 Formula 9

[0225] Simplifying equation 9 yields equation 10.

[0226]

[0227] As an example, Fig.11 This is a schematic diagram of the time domain waveform and frequency domain components of the signal after square rate detection. After the signal is bandpass filtered and amplified at the receiving end, the time domain waveform of the signal is as follows: Fig.11 As shown in (a) in the figure; after square-rate detection, many components will appear in the frequency domain, such as Fig.11 As shown in (d) in .

[0228] 4) Filter out the high-frequency components through a low-pass filter. From formula 10, we can see that formula 10 contains different frequency components. After filtering out the high-frequency components through a low-pass filter, we get the signal Satisfies formula 11.

[0229]

[0230] Where bcos[2π(F 1 -F 2 )t] represents the difference between two frequency components, which means it represents the modulation information.

[0231] 5) Use a frequency discriminator to detect. Use a frequency discriminator (or frequency discriminator circuit) to detect the signal obtained in step 4). Can get The frequency component ΔF=F 1 -F 2 , the data is modulated in ΔF, so the transmitted bits can be restored based on the demodulated ΔF.

[0232] As an example, Fig.12 FIG. 1 is a schematic diagram of using a low-pass filter to obtain a difference frequency signal applicable to an embodiment of the present application. Fig.12 As shown in the figure, after filtering out the high-frequency components through a low-pass filter, a single-frequency signal can be obtained. The receiver can read ΔF = F from the frequency detector. 1 -F 2, and then combined with the mapping relationship, the detected frequency is mapped to the transmitted signal. For example, taking the mapping relationship shown in Table 1 as an example, if ΔF=3MHz is detected on the first symbol, the 1st-2nd bits are demodulated as "10", if ΔF=4MHz is detected on the second symbol, the 3rd-4th bits are demodulated as "11", if ΔF=4MHz is detected on the third symbol, the 5th-6th bits are demodulated as "11", and if ΔF=2MHz is detected on the fourth symbol, the 7th-8th bits are demodulated as "01". Therefore, the transmitted information bit string demodulated by the receiving end is 10111101.

[0233] Through the above scheme, after the DT-FSK signal is square-rate detected, the frequency difference between the two frequencies is obtained: ΔF = |F 1 -F 2 |, the frequency difference is a low-frequency signal. For example, assuming F 1 2000MHz, F 2 is 2001MHz, then ΔF=|F 1 -F 2 | is 1MHz, so the frequency detector works at a very low frequency, which will greatly reduce the power consumption of the device.

[0234] The above embodiment is mainly illustrated by taking the target frequency as the frequency difference between the first frequency and the second frequency as an example, and is not limited to this. If the target frequency, the first frequency, and the second frequency satisfy other association relationships, then for the receiving end, the first frequency and the second frequency can be obtained first, and then according to the association relationship between the target frequency, the first frequency, and the second frequency, the target frequency can be obtained, and then demodulation is performed on the target frequency.

[0235] It should be understood that the above Fig.10 The process shown is an example and is not limited to this. For example, in actual communication, more processing steps may be included. For another example, the above-mentioned square rate detection can be replaced by other processing, as long as the target frequency ΔF can be obtained, and the discriminator can be made to work at the target frequency ΔF, it can be used in the embodiment of the present application. For another example, the above-mentioned discriminator can also be replaced by other devices or circuits or modules that can realize its functions, such as a phase locked loop (PLL), which is not limited to this.

[0236] The embodiment of the present application also provides a solution that can generate an FSK signal based on an OFDM transmitter. Fig.13 Provide explanation.

[0237] Fig.13 FIG. 1 is a schematic diagram of another signal transmission method provided according to an embodiment of the present application. Fig.13As shown, method 1300 includes the following steps.

[0238] 1310. The transmitting end device determines parameter information of the first link.

[0239] The parameter information of the first link may be predefined by a standard or configured by the network side. If configured by the network side, the network side may send the parameter information of the first link to the terminal device.

[0240] The parameter information of the first link may indicate parameter information related to the first link, or may indicate parameter information related to transmitting a wake-up signal on the first link.

[0241] As an example, in an embodiment of the present application, the parameter information of the first link may include one or more of the following information: the frequency domain resources of the first link, the time domain resources of the first link, the frequency resolution, the modulation order of FSK, and the candidate frequency domain position of the frequency. Among them, the candidate frequency domain position of the frequency indicates the possible frequency domain position of the transmission information. For the meaning of each parameter, please refer to the previous explanation, which will not be repeated here.

[0242] 1320. The transmitting device maps the information to be transmitted to the frequency.

[0243] For example, according to the modulation order of FSK, every N bits in the bit string of information to be transmitted are mapped to 1 frequency.

[0244] As an example, Fig.14 FIG. 1 is a schematic diagram of generating an FSK signal based on an OFDM transmitter according to an embodiment of the present application. Fig.14 As shown, there are 8 candidate frequency domain positions (i.e. subcarriers 4, 8, 12, 16, 20, 24, 28, 32), so the modulation order is 8, then each N = log 2 8 = 3 bits are mapped to 1 frequency. Assuming that the bit string to be transmitted is 000111101, according to the mapping relationship shown in Table 3, the 1st to 3rd bits "000" can be mapped to subcarrier 4, the 4th to 6th bits "111" can be mapped to subcarrier 32, and the 7th to 9th bits "101" can be mapped to subcarrier 24.

[0245] Table 3

[0246] Bits to be transmitted Modulation subcarrier number 000 1x4 001 2x4 010 3x4 011 4x4 100 5x4 101 6x4 110 7x4 111 8x4

[0247] The mapping relationship shown in Table 3 above may be predefined by a standard or configured by the network side. If configured by the network side, the network side may send the configured mapping relationship to the terminal device.

[0248] It should be understood that Table 3 is merely an example and is not intended to be limiting. Any variation of Table 3 is applicable to this application.

[0249] 1330. The transmitting device generates an FSK signal according to the frequency required to be sent.

[0250] In the embodiment of the present application, an FSK signal can be generated based on an OFDM transmitter. Specifically, an OFDM transmitter is used to modulate the signal, a signal is sent on a selected subcarrier, "0" is sent on other subcarriers, and then FFT is used to achieve signal modulation. The signal sent is an FSK signal, or it can also be understood as an OFDM signal that modulates one subcarrier.

[0251] It is understood that in each embodiment of the present application, "receive" may also be replaced by "detect" or "read". For example, "receive a wake-up signal" may also be replaced by "detect a wake-up signal" or "read a wake-up signal".

[0252] It can also be understood that in some of the above embodiments, "transmission" is mentioned. If no special explanation is given, transmission includes receiving and / or sending. For example, transmitting a signal may include receiving a signal and / or sending a signal.

[0253] It can also be understood that in some of the above embodiments, two modulation frequencies (i.e., the first frequency and the second frequency) are mainly used as examples for exemplary description, and it can be understood that the present application does not limit the number of modulation frequencies. For example, the number of modulation frequencies can also be more than two.

[0254] It can also be understood that in some of the above embodiments, the main circuit and the wake-up circuit, as well as the main link and the wake-up link are mainly used as examples for exemplary description, and the present application is not limited to this. For example, "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)". "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)".

[0255] It can also be understood that the formulas involved in the various embodiments of the present application are exemplary descriptions, and do not limit the protection scope of the embodiments of the present application. In the process of calculating the above-mentioned parameters, the calculation can also be performed according to the above-mentioned formula, or based on the deformation of the above-mentioned formula, or according to the formula determined by the method provided in the embodiments of the present application, or according to other methods to satisfy the result of the formula calculation.

[0256] It can also be understood that in each embodiment of the present application, the sending end device can be a network device or a terminal device, and the receiving end device can be a network device or a terminal device. For example, the sending end device is a network device, and the receiving end device is a terminal device; for another example, the sending end device is a first terminal device, and the receiving end device is a second terminal device; for another example, the sending end device is a first network device, and the receiving end device is a second network device; for another example, the sending end device is a terminal device, and the receiving end device is a network device.

[0257] It can also be understood that the Figures 5 to 14 The examples are only for the convenience of those skilled in the art to understand the embodiments of the present application, and are not intended to limit the embodiments of the present application to the specific scenarios illustrated. Figures 5 to 14 It is obvious that various equivalent modifications or changes can be made, and such modifications or changes also fall within the scope of the embodiments of the present application.

[0258] It can also be understood that some optional features in the embodiments of the present application may not depend on other features in some scenarios, or may be combined with other features in some scenarios, without limitation.

[0259] It can also be understood that the solutions in the various embodiments of the present application can be used in reasonable combination, and the explanations or descriptions of the various terms appearing in the embodiments can be mutually referenced or explained in the various embodiments, without limitation.

[0260] It can also be understood that in the above-mentioned method embodiments, the methods and operations implemented by the terminal device can also be implemented by components that can be formed by the terminal device (such as chips or circuits); in addition, the methods and operations implemented by the network device can also be implemented by components that can be formed by the network device (such as chips or circuits), without limitation.

[0261] Corresponding to the methods given in the above-mentioned method embodiments, the embodiments of the present application also provide corresponding devices, which include modules for executing the corresponding methods in the above-mentioned method embodiments. The module can be software, hardware, or a combination of software and hardware. It can be understood that the technical features described in the above-mentioned method embodiments are also applicable to the following device embodiments.

[0262] Fig.15 15 is a schematic block diagram of a communication device provided in an embodiment of the present application. The device 1500 includes a transceiver unit 1510 and a processing unit 1520. The transceiver unit 1510 can be used to implement corresponding communication functions. The transceiver unit 1510 can also be called a communication interface or a communication unit. The processing unit 1520 can be used to perform data or signal processing.

[0263] Optionally, the device 1500 also includes a storage unit, which can be used to store instructions and / or data, and the processing unit 1520 can read the instructions and / or data in the storage unit so that the device implements the actions of the terminal device in the aforementioned method embodiments.

[0264] The device 1500 can be used to execute the actions performed by the communication device (such as a transmitting device or a receiving device) in the above method embodiments. In this case, the device 1500 can be a communication device or a component of a communication device. The transceiver unit 1510 is used to execute the transceiver-related operations on the communication device (such as a transmitting device or a receiving device) in the above method embodiments, and the processing unit 1520 is used to execute the processing-related operations on the communication device (such as a transmitting device or a receiving device) in the above method embodiments.

[0265] When the device 1500 is used to implement the functions of the sending device (such as a network device) in the above method embodiments: the processing unit 1520 is used to modulate the information to be transmitted using at least the first frequency and the second frequency to generate a radio frequency signal, wherein the information to be transmitted is mapped on the target frequency, and the target frequency has an associated relationship with at least the first frequency and the second frequency; the transceiver unit 1510 is used to send the radio frequency signal.

[0266] The device 1500 can implement the steps or processes executed by the sending end device (such as a network device) in the method embodiment according to the embodiment of the present application. The device 1500 may include a method for executing Figure 5 , Figure 7 , Fig. 9 , Fig.13 The unit of the method executed by the sending end device (such as a network device) in the illustrated embodiment.

[0267] When the device 1500 is used to implement the functions of the receiving device (such as a terminal device) in the above method embodiments: the transceiver unit 1510 is used to receive a radio frequency signal, the radio frequency signal is generated by modulating information using at least a first frequency and a second frequency, the information is mapped on a target frequency, and the target frequency has an associated relationship with at least the first frequency and the second frequency; the processing unit 1520 is used to process the radio frequency signal to determine the target frequency; and demodulate the signal on the target frequency to obtain information.

[0268] The device 1500 can implement the steps or processes executed by the receiving end device (such as the terminal device) in the method embodiment according to the embodiment of the present application. The device 1500 may include a method for executing Figure 5 , Figure 7 , Fig. 9 , Fig.10 , Fig.13 The unit of the method executed by the receiving device (such as terminal device) in the illustrated embodiment.

[0269] A more detailed description of the device 1500 can be directly obtained by referring to the relevant description in the above method embodiment, and will not be repeated here.

[0270] It should also be understood that the device 1500 here is embodied in the form of a functional unit. The term "unit" here may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a dedicated processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a merged logic circuit and / or other suitable components that support the described functions. In an optional example, a person skilled in the art may understand that the device 1500 may be specifically a transmitting end device in the above-mentioned embodiment, and may be used to execute the various processes and / or steps corresponding to the transmitting end device in the above-mentioned method embodiments; in another optional example, a person skilled in the art may understand that the device 1500 may be specifically a receiving end device in the above-mentioned embodiment, and may be used to execute the various processes and / or steps corresponding to the receiving end device in the above-mentioned method embodiments. To avoid repetition, it will not be repeated here.

[0271] The apparatus 1500 of each of the above-mentioned schemes has the function of implementing the corresponding steps performed by the device (such as a transmitting end device or a receiving end device) in the above-mentioned method. The function can be implemented by hardware, or by hardware executing the corresponding software implementation. The hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the transceiver unit can be replaced by a transceiver (for example, the sending 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, respectively performing the transceiver operations and related processing operations in each method embodiment.

[0272] In addition, the above-mentioned transceiver unit 1510 can also be a transceiver circuit (for example, can include a receiving circuit and a sending circuit), and the processing unit can be a processing circuit.

[0273] It should be pointed out that Fig.15The device in the above-mentioned embodiment may be a device, or a chip or a chip system, such as a system on chip (SoC). The transceiver unit may be an input / output circuit or a communication interface; the processing unit may be a processor or a microprocessor or an integrated circuit integrated on the chip. This is not limited here.

[0274] Fig.16 1 is a schematic block diagram of another communication device provided in an embodiment of the present application. The device 1600 includes a processor 1610, the processor 1610 is coupled to a memory 1620, the memory 1620 is used to store computer programs or instructions and / or data, and the processor 1610 is used to execute the computer programs or instructions stored in the memory 1620, or read the data stored in the memory 1620, so as to execute the methods in the above method embodiments.

[0275] In some embodiments, processor 1610 is one or more.

[0276] In some embodiments, memory 1620 is one or more.

[0277] In some embodiments, the memory 1620 is integrated with the processor 1610 or is separately configured.

[0278] In some embodiments, Fig.16 As shown, the device 1600 further includes a transceiver 1630, which is used to receive and / or send signals. For example, the processor 1610 is used to control the transceiver 1630 to receive and / or send signals.

[0279] As a solution, the device 1600 is used to implement the operations performed by a device (such as a sending end device or a receiving end device) in each of the above method embodiments.

[0280] For example, the processor 1610 is used to execute the computer program or instructions stored in the memory 1620 to implement the relevant operations of the sending end device (such as a network device) in each of the above method embodiments.

[0281] For another example, the processor 1610 is used to execute the computer program or instructions stored in the memory 1620 to implement the relevant operations of the receiving device (such as the terminal device) in each of the above method embodiments.

[0282] It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0283] It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory and / or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM). For example, RAM can be used as an external cache. By way of example and not limitation, RAM includes the following forms: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0284] 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 device, discrete hardware component, the memory (storage module) can be integrated into the processor.

[0285] It should also be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0286] An embodiment of the present application also provides a computer-readable storage medium on which are stored computer instructions for implementing the methods executed by a device (such as a sending end device or a receiving end device) in the above-mentioned method embodiments.

[0287] For example, when the computer program is executed by a computer, the computer can implement the method executed by the sending end device (such as a network device) in each embodiment of the above method.

[0288] For another example, when the computer program is executed by a computer, the computer can implement the method executed by a receiving device (such as a terminal device) in each embodiment of the above method.

[0289] An embodiment of the present application also provides a computer program product, comprising instructions, which, when executed by a computer, implement the methods performed by a device (such as a sending end device or a receiving end device) in the above-mentioned method embodiments.

[0290] The explanation of the relevant contents and beneficial effects of any of the above-mentioned devices can be referred to the corresponding method embodiments provided above, which will not be repeated here.

[0291] In the 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. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0292] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. For example, the computer can be a personal computer, a server, or a network device, etc. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media integrations. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)). For example, the aforementioned available medium includes, but is not limited to, various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0293] 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 who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for signal transmission, It is characterized in that include: Mapping the information to be transmitted to the target frequency according to a mapping relationship, wherein the mapping relationship is used to represent the relationship between the target frequency and the bits of the information to be transmitted; determining at least a first frequency and a second frequency according to the target frequency; The information to be transmitted is modulated using the at least first frequency and the second frequency to generate a radio frequency signal, wherein the target frequency is associated with at least the first frequency and the second frequency; The radio frequency signal is sent, where the radio frequency signal is a wake-up signal.

2. The method according to claim 1, It is characterized in that The target frequency, the first frequency, and the second frequency satisfy the following formula: ΔF = xF 1 + yF 2 or, ΔF = xF 1 - yF 2 Wherein, ΔF represents the target frequency, F 1 represents the first frequency, F 2 represents the second frequency, and x and y are positive integers.

3. The method according to claim 1, It is characterized in that The target frequency is a frequency difference between the first frequency and the second frequency.

4. The method according to claim 1, It is characterized in that The first frequency satisfies any of the following: The first frequency is a default value; or, The first frequency is related to frequency domain resources and / or time domain resources of a first link, and the first link is a link used to transmit the radio frequency signal; or, The first frequency is configured by the network device.

5. The method according to claim 4, It is characterized in that The second frequency is determined according to the target frequency and the first frequency.

6. The method according to any one of claims 1 to 5, It is characterized in that The method of modulating the information to be transmitted by using at least a first frequency and a second frequency comprises: The information to be transmitted is modulated using at least the first frequency and the second frequency by using a multi-frequency frequency shift keying modulation method or an orthogonal frequency division multiplexing modulation method.

7. The method according to any one of claims 1 to 5, It is characterized in that Before sending the radio frequency signal, the method further includes: Sending one or more of the following information: frequency domain resources of the first link, time domain resources of the first link, frequency domain position of the target frequency, resolution of the target frequency, modulation order, frequency domain position of the first frequency, and candidate frequency domain position of the second frequency; The first link is a link used to transmit the radio frequency signal.

8. The method according to any one of claims 1 to 5, It is characterized in that The first frequency and the second frequency are located outside the following frequency domain positions: the lowest numbered N1 subcarriers and / or the highest numbered N2 subcarriers in the bandwidth used by the first link, the first link is the link used to transmit the radio frequency signal, and N1 and N2 are integers greater than 1 or equal to 1.

9. A method of signal transmission, It is characterized in that include: receiving a radio frequency signal, wherein the radio frequency signal is generated by modulating information using at least a first frequency and a second frequency, the information is mapped on a target frequency, the at least the first frequency and the second frequency are determined based on the target frequency, and the target frequency has an associated relationship with at least the first frequency and the second frequency; Processing the radio frequency signal to determine the target frequency; The signal at the target frequency is demodulated to obtain the information according to a mapping relationship, where the mapping relationship is used to represent a relationship between the target frequency and bits of the information, and the radio frequency signal is a wake-up signal.

10. The method according to claim 9, It is characterized in that The target frequency, the first frequency, and the second frequency satisfy the following formula: ΔF = xF 1 + yF 2 or, ΔF = xF 1 - yF 2 Wherein, ΔF represents the target frequency, F 1 represents the first frequency, F 2 represents the second frequency, and x and y are positive integers.

11. The method according to claim 9, It is characterized in that The target frequency is a frequency difference between the first frequency and the second frequency.

12. The method according to claim 9, It is characterized in that The first frequency satisfies any of the following: The first frequency is a default value; or, The first frequency is related to frequency domain resources and / or time domain resources of a first link, and the first link is a link used to transmit the radio frequency signal; or, The first frequency is configured by the network device.

13. The method according to any one of claims 9 to 12, It is characterized in that The modulation mode of the radio frequency signal is a multi-frequency frequency shift keying modulation mode or an orthogonal frequency division multiplexing modulation mode.

14. The method according to any one of claims 9 to 12, It is characterized in that Before receiving the radio frequency signal, the method further includes: Receive one or more of the following information: frequency domain resources of the first link, time domain resources of the first link, frequency domain position of the target frequency, resolution of the target frequency, modulation order, frequency domain position of the first frequency, and candidate frequency domain position of the second frequency; The first link is a link used to transmit the radio frequency signal.

15. The method according to any one of claims 9 to 12, It is characterized in that The first frequency and the second frequency are located outside the following frequency domain positions: the lowest numbered N1 subcarriers and / or the highest numbered N2 subcarriers in the bandwidth used by the first link, the first link is the link used to transmit the radio frequency signal, and N1 and N2 are integers greater than 1 or equal to 1.

16. A signal transmission device, It is characterized in that The method comprises a module or a unit for executing the method according to any one of claims 1 to 15.

17. A device for signal transmission, It is characterized in that The device comprises a processor, wherein the processor is configured to execute a computer program or instruction stored in a memory, so that the device performs the method according to any one of claims 1 to 15.

18. A computer-readable storage medium, It is characterized in that The computer-readable storage medium stores a computer program or instruction, and when the computer program or instruction is executed on a computer, the computer is caused to execute the method according to any one of claims 1 to 15.

19. A computer program product, It is characterized in that The computer program product comprises a computer program or instructions for performing the method according to any one of claims 1 to 15.

20. A chip, It is characterized in that The chip is coupled to a memory and is used to read and execute program instructions stored in the memory to implement the method according to any one of claims 1 to 15.

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