Signal transmission method and communication device

Abstract

The invention provides a signal transmission method and a communication device, and the method comprises the steps: receiving at least one carrier signal; and transmitting at least two reference signals, the at least two reference signals being modulation signals of the at least one carrier signal, and the at least two reference signals being used for positioning. By implementing the application, the reference signal for positioning the terminal equipment in the environmental Internet of Things can be obtained, and the positioning precision of the terminal equipment in the environmental Internet of Things is improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a signal transmission method and a communication device. Background Art

[0002] There is usually a positioning requirement in cellular communications. For example, the terminal device can be located based on the Positioning Reference Signal (PRS) sent by the downlink air interface. For another example, the terminal device can be located based on the Sounding Reference Signal (SRS) sent by the uplink air interface. In order to achieve high positioning accuracy requirements when positioning based on PRS and SRS, a large bandwidth is required. In some low-bandwidth, low-terminal complexity scenarios, such as environmental Internet of Things, terminal devices are usually ultra-low power, extremely small size and extremely low-cost devices. The terminal devices have low capabilities and occupy less bandwidth, and it is impossible to use PRS and SRS to locate the terminal devices. Summary of the invention

[0003] The embodiments of the present application provide a signal transmission method and a communication device, which can obtain a reference signal for positioning a terminal device in an environmental Internet of Things, thereby improving the positioning accuracy of the terminal device in the environmental Internet of Things.

[0004] In a first aspect, an embodiment of the present application provides a signal transmission method, the method comprising:

[0005] receiving at least one carrier signal;

[0006] At least two reference signals are sent, where the at least two reference signals are modulation signals of the at least one carrier signal, and both of the at least two reference signals are used for positioning.

[0007] In the embodiment of the present application, the terminal device modulates the received carrier signal to obtain at least two reference signals for positioning, which helps to simplify the method of obtaining multiple reference signals for positioning in the ambient Internet of Things (Ambient-IoT, A-IoT). Further, it also helps to perform positioning in the ambient Internet of Things and improve positioning accuracy.

[0008] Optionally, different reference signals in the at least two reference signals have different frequencies.

[0009] By implementing this method, at least two reference signals with different frequencies are obtained, so that the terminal device can be positioned based on the carrier phase difference of the reference signals with different frequencies, thereby improving the positioning accuracy.

[0010] Optionally, the at least one carrier signal includes a first carrier signal and a second carrier signal, and the at least two reference signals include a first reference signal and a second reference signal;

[0011] The first reference signal is a modulation signal of the first carrier signal, and the second reference signal is a modulation signal of the second carrier signal;

[0012] The frequency of the first reference signal is the same as the frequency of the first carrier signal, and the frequency of the second reference signal is the same as the frequency of the second carrier signal.

[0013] In an embodiment of the present application, the reference signal after the carrier signal is backscattered has the same frequency as the carrier signal, and reference signals of multiple frequencies can be obtained after backscattering of multiple carrier signals, so that positioning can be achieved by measuring the carrier phase difference of the reference signals of multiple frequencies.

[0014] Optionally, the at least one carrier signal includes a first carrier signal, and the at least two reference signals include a first reference signal and a second reference signal;

[0015] The first reference signal is a first modulation signal of the first carrier signal, and the second reference signal is a second modulation signal of the first carrier signal;

[0016] The frequency point of the first reference signal is spaced from the frequency point of the first carrier signal by a first offset; the frequency point of the second reference signal is spaced from the frequency point of the first carrier signal by a second offset.

[0017] In the embodiment of the present application, after a carrier signal is backscattered, a first reference signal and a second reference signal with different frequencies can be obtained, thereby facilitating positioning by measuring the carrier phase difference of the reference signals with different frequencies.

[0018] Optionally, the method further includes:

[0019] Receiving frequency indication information;

[0020] The frequency indication information indicates the first offset and the second offset; or the frequency indication information indicates the frequency of the first reference signal and the frequency of the second reference signal.

[0021] In the embodiment of the present application, the frequency point or offset of each reference signal may be indicated by the network, thereby facilitating the determination of the frequency point of each reference signal.

[0022] In an optional implementation, the first reference signal and the second reference signal are both scrambled by terminal device information, and the terminal device information identifies a sending device of the at least two reference signals.

[0023] By implementing this method, the reference signal can be encrypted through the terminal device information, thereby making it easier for the network side to determine the sending device of the reference signal.

[0024] Optionally, the terminal device information is an identifier of the terminal device or a wireless network temporary identifier.

[0025] In an embodiment of the present application, the reference signal may be scrambled by an identifier of a terminal device or a wireless network temporary identifier, so as to distinguish the terminal device sending the reference signal.

[0026] Optionally, the method further includes:

[0027] An activation signal is received, the activation signal indicating triggering of backscatter positioning.

[0028] In the embodiment of the present application, backscatter positioning can be triggered by an activation signal, thereby facilitating the terminal device to subsequently receive the carrier signal.

[0029] Optionally, the activation signal further indicates carrier signal configuration information, and the carrier signal configuration information is used to configure the at least one carrier signal.

[0030] In an embodiment of the present application, the activation signal indicates carrier signal configuration information, thereby facilitating the terminal device to receive the carrier signal.

[0031] Optionally, the carrier signal configuration information indicates at least one of the following: the frequency of the at least one carrier signal, the time-frequency domain resources occupied by the at least one carrier signal, the duration of the at least one carrier signal, the bandwidth of the at least one carrier signal, the sending period of the at least one carrier signal, the number of repetitions of the at least one carrier signal, the mute configuration of the at least one carrier signal, and the starting time domain position of the at least one carrier signal.

[0032] Optionally, the activation signal is carried in at least one of the following information: a paging message, a non-access stratum NAS message, a radio resource control protocol RRC signaling, a media access control element MAC CE or downlink control information DCI.

[0033] In the embodiment of the present application, the activation signal is carried in the existing signaling or message, so as to achieve the purpose of sending the activation signal to the terminal with less signaling overhead.

[0034] Optionally, the method further includes:

[0035] Reference signal configuration information is received, where the reference signal configuration information is used to configure the at least two reference signals.

[0036] In an embodiment of the present application, reference signal configuration information is used to facilitate the terminal device to send the at least two reference signals.

[0037] Optionally, the reference signal configuration information is carried in at least one of the following information: a paging message, a NAS message, an RRC signaling, a MAC CE or a DCI.

[0038] In an embodiment of the present application, reference signal configuration information is carried in existing signaling or messages, thereby saving signaling.

[0039] In a second aspect, an embodiment of the present application provides a signal transmission method, the method comprising:

[0040] transmitting at least one carrier signal;

[0041] At least two reference signals are received, where the at least two reference signals are modulation signals of the at least one carrier signal, and both of the at least two reference signals are used for positioning.

[0042] Optionally, different reference signals in the at least two reference signals have different frequencies.

[0043] Optionally, the at least one carrier signal includes a first carrier signal and a second carrier signal, and the at least two reference signals include a first reference signal and a second reference signal;

[0044] The first reference signal is a modulation signal of the first carrier signal, and the second reference signal is a modulation signal of the second carrier signal;

[0045] The frequency of the first reference signal is the same as the frequency of the first carrier signal, and the frequency of the second reference signal is the same as the frequency of the second carrier signal.

[0046] Optionally, the at least one carrier signal includes a first carrier signal, and the at least two reference signals include a first reference signal and a second reference signal;

[0047] The first reference signal is a first modulation signal of the first carrier signal, and the second reference signal is a second modulation signal of the first carrier signal;

[0048] The frequency point of the first reference signal is spaced from the frequency point of the first carrier signal by a first offset; the frequency point of the second reference signal is spaced from the frequency point of the first carrier signal by a second offset.

[0049] Optionally, the method further includes:

[0050] Send frequency indication information;

[0051] The frequency indication information indicates the first offset and the second offset; or the frequency indication information indicates the frequency of the first reference signal and the frequency of the second reference signal.

[0052] Optionally, the first reference signal and the second reference signal are both scrambled by terminal device information, and the terminal device information identifies a sending device of the at least two reference signals.

[0053] Optionally, the terminal device information is an identifier of the terminal device or a wireless network temporary identifier.

[0054] Optionally, the method further includes:

[0055] An activation signal is sent, wherein the activation signal indicates triggering backscatter positioning.

[0056] Optionally, the activation signal further indicates carrier signal configuration information, and the carrier signal configuration information is used to configure the at least one carrier signal.

[0057] Optionally, the carrier signal configuration information indicates at least one of the following: the frequency of the at least one carrier signal, the time-frequency domain resources where the at least one carrier signal is located, the duration of the at least one carrier signal, the bandwidth of the at least one carrier signal, the sending period of the at least one carrier signal, the number of repetitions of the at least one carrier signal, the mute configuration of the at least one carrier signal, and the starting time domain position of the at least one carrier signal.

[0058] Optionally, the activation signal carries at least one of the following information: a paging message, a non-access stratum NAS message, a radio resource control protocol RRC signaling, a media access control element MAC CE, and downlink control information DCI.

[0059] Optionally, the method further includes:

[0060] Reference signal configuration information is sent, where the reference signal configuration information is used to configure the at least two reference signals.

[0061] Optionally, the reference signal configuration information is carried in at least one of the following information: a paging message, a NAS message, an RRC signaling, a MAC CE, and a DCI.

[0062] The beneficial effects of the second aspect and various optional implementations of the second aspect can refer to the beneficial effects of the first aspect and various optional implementations of the first aspect, and will not be repeated here.

[0063] In a third aspect, an embodiment of the present application provides a communication device, which includes a unit for implementing the method in any possible implementation manner of the first aspect above.

[0064] In a fourth aspect, an embodiment of the present application provides a communication device, which includes a unit for implementing the method in any possible implementation manner of the second aspect above.

[0065] In a fifth aspect, an embodiment of the present application provides a communication device, which includes a processor and a memory, the processor and the memory are interconnected, the memory is used to store a computer program, the computer program includes program instructions, and the processor is configured to call the program instructions to execute the method described in the first aspect or any optional embodiment of the first aspect, or to execute the method described in the second aspect or any optional embodiment of the second aspect.

[0066] In a sixth aspect, an embodiment of the present application provides a chip, comprising a processor and an interface, wherein the processor and the interface are coupled; the interface is used to receive and / or output signals, and the processor is used to execute code instructions to execute a method as described in the first aspect or any optional embodiment of the first aspect, or to execute a method as described in the second aspect or any optional embodiment of the second aspect.

[0067] In the seventh aspect, an embodiment of the present application provides a module device, which includes a communication module, a power module, a storage module and a chip module, wherein: the power module is used to provide power to the module device; the storage module is used to store data and / or instructions; the communication module communicates with an external device; the chip module is used to call the data and / or instructions stored in the storage module, and in combination with the communication module, execute the method described in the first aspect or any optional implementation of the first aspect, or execute the method described in the second aspect or any optional implementation of the second aspect.

[0068] In the eighth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program includes program instructions. When the computer executes the program instructions, it implements the method described in the first aspect or any optional embodiment of the first aspect, or implements the method described in the second aspect or any optional embodiment of the second aspect.

[0069] In the ninth aspect, an embodiment of the present application provides a computer program product, which includes a computer program or a computer code, and when the computer program product is run on a computer, it is used to implement the method described in the first aspect or any optional embodiment of the first aspect, and to implement the method described in the second aspect or any optional embodiment of the second aspect.

[0070] In a tenth aspect, an embodiment of the present application provides a communication system, which includes a terminal device and a network device. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] Figure 1a is a schematic diagram of a backscattering system provided in an embodiment of the present application;

[0072] Figure 1b It is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application;

[0073] Figure 1c is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application;

[0074] Figure 2a It is a flowchart of a signal transmission method provided in an embodiment of the present application;

[0075] Figure 2b is a carrier signal configuration example provided in an embodiment of the present application;

[0076] Figure 2c is a schematic diagram of an amplitude modulation provided by an embodiment of the present application;

[0077] Figure 3 is a flow chart of another signal transmission method provided in an embodiment of the present application;

[0078] Figure 4a This is an example of the signal transmission method provided in the embodiment of the present application;

[0079] Figure 4b is another example of the signal transmission method provided in the embodiment of the present application;

[0080] Figure 4c This is another example of the signal transmission method provided in the embodiment of the present application;

[0081] Figure 5 is a structural diagram of a communication device provided in an embodiment of the present application;

[0082] Figure 6 is a structural diagram of another communication device provided in an embodiment of the present application;

[0083] Figure 7 It is a structural schematic diagram of a module device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0084] In the embodiments of the present application, unless otherwise specified, the character " / " indicates that the objects before and after the association are in an or relationship. For example, A / B can represent A or B. "And / or" describes the association relationship of the associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone.

[0085] It should be pointed out that the words "first", "second", etc. involved in the embodiments of the present application are only used to distinguish the description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, nor can they be understood as indicating or implying order.

[0086] In the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. In addition, "at least one of the following" or similar expressions refers to any combination of these items, which may include any combination of single items or plural items. For example, at least one of A, B, or C may represent: A, B, C, A and B, A and C, B and C, or A, B and C. Among them, each of A, B, and C may be an element itself, or a set containing one or more elements.

[0087] In the embodiments of the present application, "exemplary", "in some embodiments", "in another embodiment", etc. are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present concepts in a concrete way.

[0088] In the embodiments of the present application, "of", "corresponding", and "corresponding" can sometimes be used interchangeably. It should be noted that when the distinction between them is not emphasized, the meanings to be expressed are consistent. In the embodiments of the present application, communication and transmission can sometimes be used interchangeably. It should be noted that when the distinction between them is not emphasized, the meanings to be expressed are consistent. For example, transmission can include sending and / or receiving, which can be a noun or a verb.

[0089] The equal to involved in the embodiments of the present application can be used in conjunction with greater than, and is applicable to the technical solution adopted when greater than, and can also be used in conjunction with less than, and is applicable to the technical solution adopted when less than. It should be noted that when equal to is used in conjunction with greater than, it cannot be used in conjunction with less than; when equal to is used in conjunction with less than, it cannot be used in conjunction with greater than.

[0090] Some terms involved in the embodiments of the present application are explained below to facilitate understanding by those skilled in the art.

[0091] 1. Backscatter communication

[0092] Backscatter communication is a very low-power modulation and transmission technology designed based on the principle of RF signal backscattering. It is a very low-power, low-cost passive communication technology suitable for IoT applications. Backscatter communication systems generally include three nodes or entities, namely, the ambient RF source, the backscatter device, and the backscatter receiving device. Figure 1a A backscatter communication system is provided in an embodiment of the present application, in which an ambient radio frequency source sends an electromagnetic wave (i.e., a carrier signal) of a certain frequency to provide energy to a backscatter device. The backscatter device receives the carrier signal sent by the ambient radio frequency source and charges it, then modulates its own information to be transmitted (e.g., business data) onto the carrier signal to obtain a modulated signal, and sends the modulated signal to a backscatter receiving device. The backscatter receiving device can receive the modulated signal sent by the backscatter device and demodulate it to obtain the information to be transmitted. The modulation method in the backscatter communication system can adopt amplitude shift keying (ASK), frequency shift keying (FSK), phase shift keying (PSK) or binary phase shift keying (BPSK), etc.

[0093] The above-mentioned environmental RF source can also be called a helper, an exciter or an excitation device, etc., without limitation here. The backscatter device can also be called a backscatter device, a reflection device, an electronic tag, or a tag, etc., without limitation here. The backscatter receiving device can also be called a receiver, a receiver or a reader / writer, etc., without limitation here. The environmental RF source mainly sends a carrier signal to provide energy to the tag and activate the tag. The tag is a passive device. When it receives the carrier signal sent by the environmental RF source, it starts to reflect the signal. The tag can be considered as a full-duplex device. While receiving energy / signals / carriers, it also modulates and reflects its own information. The backscatter receiving device can control the environmental RF source to send instructions and carrier signals, and at the same time receive information from the tag.

[0094] In some implementations, the ambient RF source and the backscatter receiving device can be integrated into one device, that is, the integrated device can both send carrier signals and have the function of receiving modulated signals. For example, in a radio frequency identification (RFID) system, the ambient RF source and the backscatter receiving device are integrated into a reader, and the backscatter device is called a tag in the RFID system. In other feasible implementations, the backscatter device can also be called a passive device, a semi-passive device, or an ambient signal device.

[0095] In some implementations, the ambient RF source and the backscatter receiving device may adopt a separate architecture, that is, the ambient RF source and the backscatter receiving device are two devices respectively, wherein the ambient RF source is used to send a carrier signal, and the backscatter receiving device is used to receive a modulated signal.

[0096] It should be noted that the embodiments of the present application all take the environmental RF source and the backscatter receiving device in the backscatter communication system as an example in which they are integrated into the same device.

[0097] Exemplarily, there may be multiple relationships between the ambient RF source, the backscatter receiving device, and the reverse communication device in a Long Term Evolution (LTE) or new radio (NR) network. For example, the ambient RF source and the backscatter receiving device may be network devices, such as a base station; the backscatter device may be a terminal device. The following describes the terminal device and the network device by way of example:

[0098] In the embodiments of the present application, the terminal device is a device with wireless transceiver functions, which can be referred to as a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), access terminal equipment, vehicle-mounted terminal equipment, industrial control terminal equipment, UE unit, UE station, mobile station, remote station, remote terminal equipment, mobile equipment, UE terminal equipment, wireless communication equipment, UE agent or UE device, etc. The terminal device can be fixed or mobile. It should be noted that the terminal device can support at least one wireless communication technology, such as long term evolution (LTE), new radio (NR), etc. For example, the terminal device may be a mobile phone, a tablet computer (pad), a desktop computer, a laptop computer, an all-in-one computer, a vehicle-mounted terminal, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a wearable device, a terminal device in a future mobile communication network, or a terminal device in a future evolved public mobile land network (PLMN), etc. In some embodiments of the present application, the terminal device may also be a device with transceiver functions, such as a chip system, wherein the chip system may include a chip and may also include other discrete devices.

[0099] In the embodiment of the present application, the network device is a device that provides wireless communication functions for the terminal device, and can also be referred to as an access network device, a radio access network (RAN) device, etc. Among them, the network device can support at least one wireless communication technology, such as LTE, NR, etc. For example, the network device includes but is not limited to: the next generation base station (generation nodeB, gNB) in the fifth generation mobile communication system (5th-generation, 5G), the base station in the sixth generation mobile communication system (6th-generation, 6G), the evolved node B (evolved node B, eNB), the radio network controller (radio network controller, RNC), the node B (node ​​B, NB), the base station controller (base station controller, BSC), the base transceiver station (base transceiver station, BTS), the home base station (for example, home evolved node B, or home node B, HNB), the baseband unit (baseband unit, BBU), the transmitting and receiving point (transmitting and receiving point, TRP), the transmitting point (transmitting point, TP), the mobile switching center, etc. The network device may also be a wireless controller, a centralized unit (CU), and / or a distributed unit (DU) in a cloud radio access network (CRAN) scenario, or the network device may be a relay station, an access point, a vehicle-mounted device, a terminal device, a wearable device, and a network device in future mobile communications or a network device in a future evolving PLMN. In some embodiments, the network device may also be a device having a wireless communication function for a terminal device, such as a chip system. For example, the chip system may include a chip and may also include other discrete devices.

[0100] 2. Environmental Internet of Things

[0101] Environmental Internet of Things can also be called passive Internet of Things. Passive Internet of Things technology refers to Internet of Things without "source". This "source" refers to power supply and energy source. At present, the most common passive Internet of Things technology refers to: RFID, which is a kind of automatic identification technology. It uses wireless radio frequency to carry out non-contact two-way data communication and uses wireless radio frequency to read and write recording media (electronic tags or radio frequency cards). Another passive Internet of Things technology is cellular backscatter communication. The communication architecture can be as follows: Figure 1b and Figure 1cshown.

[0102] like Figure 1b As shown, it is an architecture diagram of a communication system provided in an embodiment of the present application, in Figure 1b In the process, the network device communicates directly with the tag device, sending a carrier signal and an activation signal to the tag device. The carrier signal is used to provide energy to the tag device and a carrier for modulation, and the activation signal carries the control information of the passive tag. The tag device transmits the modulated signal to the network device by backscattering. Figure 1b This type of architecture involves few hardware devices, low communication latency, and a relatively simple networking solution, but is limited by the tag receiving sensitivity, and the downlink budget is smaller than the uplink budget. It is suitable for open outdoor application scenarios such as logistics, animal husbandry, and transportation.

[0103] like Figure 1c As shown, it is an architecture diagram of another communication system provided in an embodiment of the present application, in Figure 1c In the embodiment, there is a relay node between the network device and the tag device. The relay node relays and forwards the air interface signaling from the network device or the modulated signal from the tag device. Exemplarily, the network device sends the air interface signaling to the relay node, and the relay node sends the carrier signal and the activation signal to start the communication with the tag device. Figure 1c In this type of architecture, short-range excitation of relay nodes can improve the downlink transmission distance and ensure continuous network coverage. At the same time, since the coverage of relay nodes is much smaller than that of base stations, fixed-point excitation can be achieved (such as: only stimulating passive tags on a specific assembly line in a workshop). In addition, relay nodes can have protocol conversion functions and good compatibility. However, this type of equipment is mostly produced and managed by terminal manufacturers. Therefore, Figure 1c The architecture is mostly suitable for indoor scenarios such as homes and medical treatments where reusable terminal devices exist, as well as scenarios such as factories and retail that require fixed-point incentives.

[0104] comprehensive Figure 1b and Figure 1c The network device in the embodiment of the present application may be a base station or a terminal device, and the tag device may be a passive tag or a low-power device, etc.

[0105] 3. Carrier phase positioning

[0106] Carrier phase positioning is a positioning method with high positioning accuracy. The core idea of ​​carrier phase positioning technology is that the carrier phase information of the signal contains the distance information between the signal receiver and the signal transmitter, which can be used to determine the location of the terminal device. Carrier phase positioning mainly measures the carrier phase of multiple carriers at multiple frequency points to obtain the carrier phase measurement values ​​or carrier phase differential measurements of multiple frequency points, and then obtains the location of the terminal device based on the carrier phase measurement values ​​or carrier phase differential measurements of the multiple frequency points.

[0107] The following example uses a base station sending a carrier signal, and the terminal device modulates the carrier signal to obtain two modulation signals, and the two modulation signals are sent at different frequencies. The base station measures the carrier phase difference of the two modulation signals at two frequencies to locate the terminal device. In the following description, modulation signal 1 is called signal 1, and modulation signal 2 is called signal 2. Modulation signal 1 and modulation signal 2 are two modulation signals measured by the base station:

[0108] signal 1=cos(ω1*t+θ1)=cos(2π*f1*t+θ1)

[0109] signal 2=cos(ω2*t+θ2)=cos(2π*f2*t+θ2)

[0110] Among them, ω1 is the carrier angular frequency of modulation signal 1, θ1 is the initial phase of modulation signal 1, f1 is the carrier center frequency of modulation signal 1 (i.e., the frequency point of modulation signal 1), ω2 is the carrier angular frequency of modulation signal 2, θ2 is the initial phase of modulation signal 2, f2 is the carrier center frequency of modulation signal 2 (i.e., the frequency point of modulation signal 2), where ω1=2π*f1, ω2=2π*f2.

[0111]

[0112] The phase difference is the carrier phase difference between modulation signal 1 and modulation signal 2 measured by the base station, θdelta is the initial phase difference between modulation signal 1 and modulation signal 2, T is the signal propagation delay between modulation signal 1 and modulation signal 2 sent from the terminal device to the base station device, d is the distance between the base station and the terminal device, and c is the speed of light. Wherein, T = d / c.

[0113] From the above, it can be seen that the distance between the base station and the terminal device can be calculated by measuring the phase difference between the modulation signal 1 and the modulation signal 2. Multiple base stations perform distance measurement on the terminal device, and the position of the terminal device can be located.

[0114] The signal transmission method in the embodiment of the present application is described below. It should be noted that the various technical solutions (or embodiments) of the present application can be implemented independently or in combination based on certain internal connections. The present application is not limited thereto. And the various terms and definitions between the various embodiments can be referenced to each other. In each embodiment of the present application, different implementations can also be implemented in combination or independently.

[0115] Please refer to Figure 2a , is a flow chart of a signal transmission method provided in an embodiment of the present application, such as Figure 2aAs shown, the signal transmission method includes but is not limited to the following steps:

[0116] 201. A network device sends at least one carrier signal, and a terminal device receives the at least one carrier signal accordingly.

[0117] In an embodiment of the present application, the carrier signal may be a pure sinusoidal wave signal, or a subcarrier signal modulated by orthogonal frequency division multiplexing (OFDM), or a carrier signal processed by other methods, and the present application does not impose any restrictions. One carrier signal in the at least one carrier signal may correspond to a frequency point, and the frequency point of the carrier signal may be understood as the center frequency of the carrier signal. For example, the at least one carrier signal includes two carrier signals, the frequency point of carrier signal 1 is f1, and the frequency point of carrier signal 2 is f2, and f1 is different from f2. For another example, the at least one carrier signal may include a carrier signal.

[0118] The network device may broadcast or unicast at least one carrier signal. For example, if it is necessary to locate the positions of multiple terminal devices in a cell, the carrier signal may be broadcast.

[0119] Optionally, before step 201, the method further includes step 200;

[0120] 200. The network device sends carrier signal configuration information. Correspondingly, the terminal device receives the carrier signal configuration information and receives the at least one carrier signal according to the carrier signal configuration information, where the carrier signal configuration information is used to configure the at least one carrier signal. The carrier signal configuration information may indicate at least one of the following:

[0121] 1. The frequency of the at least one carrier signal. Exemplarily, the carrier signal configuration information may indicate the frequency information of each carrier signal, where the frequency of the carrier signal refers to the center frequency of the carrier signal.

[0122] 2. The time-frequency domain resources occupied by the at least one carrier signal. Exemplarily, it may indicate the time-domain resources and / or frequency-domain resources of the at least one carrier signal. Optionally, it may indicate the starting time-domain resource position and frequency-domain resource position information of the at least one carrier signal.

[0123] The time domain resource position can follow the time domain resource position indication method of the positioning reference signal in the existing new radio (New Radio, NR). For example, the starting time domain position can be indicated. The starting time domain position of the carrier signal can be the starting symbol or starting time slot of the carrier signal. For example, the starting time domain position can be indicated by indicating the initial transmission offset of the carrier signal, and the initial transmission offset can be calculated by time slots, or it can also be calculated by symbols, and the symbol can be an OFDM symbol. For example, the starting time slot offset and the starting symbol offset of the time domain resource are indicated.

[0124] The frequency domain resource position may also follow the frequency domain resource position indication method of the positioning reference signal in the existing NR, for example, indicating the frequency domain comb format and the starting frequency domain offset value. If the frequency domain resources where the at least one carrier signal is located are the same, a frequency domain resource may be indicated, and the frequency domain resource is applicable to the at least one carrier signal, or the frequency domain resources where each carrier signal is located may be indicated respectively. If the time domain resources where the at least one carrier signal is located are the same, a time domain resource may be indicated, and the time domain resource is applicable to the at least one carrier signal, or the time domain resources where each carrier signal is located may be indicated respectively.

[0125] 3. The duration of the at least one carrier signal. The duration of the carrier signal indicates the length of time that the continuous carrier signal is continuously transmitted. Exemplarily, the above-mentioned duration time interval can be represented by the number of frames, the number of time slots or the number of symbols, or a combination of the above three methods. For example, carrier signal 1 continuously transmits a time length of N1 frames or M1 time slots or L1 symbols. Exemplarily, the above-mentioned duration time interval is represented by an absolute duration, such as T1 time interval, and the unit of T1 can be hours, minutes, seconds, milliseconds, microseconds, etc. For example, carrier signal 1 continuously transmits T1 seconds. It should be noted that the present invention does not limit the representation method of the duration time interval. The following is a configuration method for the duration of the carrier signal. Exemplarily, a duration can be indicated for the at least one carrier signal. In other words, the duration of each carrier signal in the at least one carrier signal is the indicated duration. Exemplarily, the duration corresponding to each carrier signal can also be indicated separately. For example, if the at least one carrier signal includes carrier signal 1 and carrier signal 2, then the duration of carrier signal 1 is T1, and the duration of carrier signal 2 is T2. T1 and T2 can be the same or different.

[0126] 4. The bandwidth of the at least one carrier signal. The bandwidth of the above-mentioned carrier signal refers to the width of the frequency domain resources occupied by the carrier signal. Exemplarily, the carrier signal bandwidth is 5M, 10M, etc. Exemplarily, a bandwidth can be indicated, and the bandwidth is applicable to the at least one carrier signal. In other words, the bandwidth of each carrier signal in the at least one carrier signal is the indicated bandwidth. Exemplarily, the bandwidth corresponding to each carrier signal can also be indicated separately. For example, the at least one carrier signal includes carrier signal 1 and carrier signal 2, then the bandwidth of carrier signal 1 is indicated as W1, and the bandwidth of carrier signal 2 is indicated as W2, wherein W1 and W2 can be the same or different.

[0127] 5. The transmission period of the at least one carrier signal. The transmission period of the above-mentioned carrier signal refers to the periodic transmission of the carrier signal in the time domain. The transmission period indicates the time interval between the two most closely spaced transmission signals for the same carrier signal. Exemplarily, the above-mentioned time interval can be represented by a frame, a time slot, a symbol, or a combination of a frame, a time slot and a symbol. Or the above-mentioned time interval can be represented by an absolute time interval. Exemplarily, a transmission period can be indicated. For example, the transmission period can be indicated as being transmitted once every N time slots. The transmission period is applicable to the at least one carrier signal. In other words, the transmission period of each carrier signal in the at least one carrier signal is the transmission period indicated. Exemplarily, the transmission periods corresponding to each carrier signal can also be indicated separately. For example, if the at least one carrier signal includes carrier signal 1 and carrier signal 2, the transmission period of carrier signal 1 is T1, and the transmission period of carrier signal 2 is T2. T1 and T2 can be the same or different.

[0128] 6. The number of repetitions of the at least one carrier signal. The number of repetitions of a carrier signal is the number of times the carrier signal is repeatedly sent. Exemplarily, a repetition number may be indicated, and the repetition number is applicable to the at least one carrier signal. In other words, the number of repetitions of each carrier signal in the at least one carrier signal is the indicated number of repetitions. Exemplarily, the number of repetitions corresponding to each carrier signal may also be indicated separately. For example, if the at least one carrier signal includes carrier signal 1 and carrier signal 2, the number of repetitions of carrier signal 1 is indicated as P1, and the number of repetitions of carrier signal 2 is indicated as P2.

[0129] 7. Mute configuration of the at least one carrier signal. The mute configuration of the carrier signal is used to configure the carrier signal not to be sent in one or more periods of periodic transmission. Exemplarily, a mute configuration may be indicated, and the mute configuration is applicable to the at least one carrier signal. Exemplarily, the mute configurations corresponding to each carrier signal may also be indicated respectively.

[0130] Combine the following Figure 2bThe above configuration information is illustrated with an example. Figure 2b As shown, this is an example of the configuration of the carrier signal at frequency f1. Figure 2b The number of repetitions of the carrier signal is 4 times, and the transmission period is the time interval between the transmissions of two adjacent carrier signals. The duration of the transmission of the carrier signal in one transmission period is the duration of the carrier signal. If the third transmission is not performed in the four repeated transmissions, it can be configured through the mute configuration. For example, one period corresponds to one bit, 1 indicates that the carrier signal is transmitted in the corresponding period, and 0 indicates that the carrier signal is not transmitted in the corresponding period, then the mute configuration can be 1101 to indicate that the carrier signal is not transmitted for the third time.

[0131] The carrier signal configuration information includes one or more of the above 1-7, and may also include other configuration information, which is not limited in this application and is only an example. For example, the carrier signal configuration information may include 1, 2, and 3 of the above 1-7, that is, it only includes the frequency of the carrier signal, the time-frequency domain resources occupied by the carrier signal, and the duration of the carrier signal. For another example, the carrier signal is sent periodically, and the carrier signal configuration information may include 1, 2, 3, 5, and 6 of the above 1-7. For another example, the carrier signal configuration information may include 1, 2, 3, 5, 6, and 7 of the above 1-7. It can be understood that in the specific implementation, one or more of the above 1-7 can be flexibly combined according to the scenario.

[0132] In some embodiments, the above-mentioned carrier signal configuration information can be determined by at least one of the following methods: predefined (for example, agreed upon by protocol), preconfigured, configured by a network device (for example, a base station), configured by a location server (LoCationService, LCS), etc.

[0133] A possible implementation of the above-mentioned predefined manner is protocol definition, for example, the protocol predefines the carrier signal configuration information and does not require flexible configuration.

[0134] Pre-configuration method, one possible implementation method is network pre-configuration, for example, network equipment, such as base stations, configures the carrier signal configuration information to the terminal device in advance through Radio Resource Control (RRC) messages, media access control (MAC) control elements (CE) or downlink control information (DCI) before the terminal device needs to receive the carrier signal. The RRC message may be RRC reconfiguration information or RRC release information. MAC CE can define a new MAC CE to include the above-mentioned carrier signal configuration information. DCI can define a new DCI format to transmit the above-mentioned carrier signal configuration information.

[0135] If the carrier signal configuration information is determined and configured by the LMF, the carrier signal configuration information can be sent by the LMF to the network device (such as gNB) through NRPPa signaling, and then the network device sends the carrier signal configuration information to the terminal device. The NRPPa signaling can be multiplexed in the positioning information request positioninginformationrequest, the TRP information request TRPInformationRequest message, the assistance information control assistanceinformationcontrol message, or the measurement request measurementrequest message. The NRPPa signaling can also be a newly added NRPPa signaling for transmitting the above-mentioned carrier signal configuration information. The network device can send the carrier signal configuration information to the terminal device in the manner described above, through Paging, NAS message, RRC signaling, MAC CE or DCI.

[0136] If the carrier signal configuration information is configured by a network device (such as a base station), it should be noted that the configuration information can be determined by the network device itself or can come from the LMF configuration. The carrier signal configuration information can be carried in at least one of the following: a paging message (such as a short message), a non-access stratum (NAS) message, a radio resource control (RRC) signaling, a media access control element MAC CE, and downlink control information (DCI). Exemplarily, the carrier signal configuration information can be carried in multiple messages, and each of the multiple messages can include a portion of the information in the carrier signal configuration information. For example, the carrier signal configuration information is included in the paging message and the RRC signaling, that is, a portion of the information in the carrier signal configuration information is carried in the paging message, and a portion of the information is carried in the RRC signaling.

[0137] In one implementation, part of the carrier signal configuration information may be predefined, and part of the information may be flexibly configured. For example, the frequency of the carrier signal may be predefined, and other information in the carrier signal configuration information may be flexibly configured, for example, it may be configured by a network device (such as a base station) or an LCS.

[0138] 202, the terminal device sends at least two reference signals, the at least two reference signals are modulated signals of the at least one carrier signal, and the at least two reference signals are used for positioning. Correspondingly, the network device receives the at least two reference signals. Further, the network device determines the location of the terminal device based on the received at least two reference signals.

[0139] The terminal device receives the carrier signal, and further modulates the carrier signal to obtain a modulation signal corresponding to the carrier signal. After the carrier signal is modulated, the modulation signal is used as a reference signal for positioning, and the reference signal is sent out. The modulation may include at least one modulation mode: amplitude modulation, frequency modulation, and phase modulation.

[0140] Exemplarily, the terminal device may modulate the carrier signal using a pseudo-random sequence to obtain a reference signal for positioning, and then the terminal device sends the reference signal. The pseudo-random sequence may be a randomly generated series of pseudo-random sequences, or the pseudo-random sequence may also be a gold sequence, a zadoff_chu sequence, or a new sequence, etc. The entire process may be referred to as a backscattering process.

[0141] Combine the following Figure 2c The specific modulation process of the carrier signal is illustrated by an example. Figure 2c Amplitude modulation is taken as an example. For example, the carrier signal is a sinusoidal wave signal, and the pseudo-random sequence is 10011. When the carrier signal is amplitude modulated using the pseudo-random sequence, one bit in the pseudo-random sequence corresponds to two cycles of the carrier signal. If the bit is 1, the amplitude of the carrier signal of the two cycles corresponding to the bit in the modulated signal remains unchanged. If the bit is 0, the amplitude of the carrier signal of the two cycles corresponding to the bit in the modulated signal decreases.

[0142] Alternatively, the at least two reference signals are modulation signals of the at least one carrier signal, and alternatively, the at least one reference signal is a signal obtained by modulating the at least one carrier signal. In the embodiment of the present application, the reference signal can be understood as a modulation signal carrying a pseudo-random sequence.

[0143] In some embodiments, one of the at least two reference signals may correspond to a frequency point, and the frequency point of the reference signal may be understood as the center frequency of the reference signal. The frequencies of the reference signals may be different from each other. The network device may measure at least two reference signals at at least two frequency points to obtain measurement results. Then, the terminal device calculates the distance between the network device and the terminal device through the carrier phase or carrier phase difference of the at least two reference signals, thereby realizing the positioning of the terminal device, wherein the positioning terminal device may also be combined with other positioning methods, such as the common downlink time difference of arrival (DL Time Difference of Arrival, DL-TDoA), downlink angle of departure (Downlink Angle-of-Departure, DL-AoD), uplink angle of arrival (Uplink Angle-of-Arrival, UL-AoA), etc. The specific calculation method may refer to the "carrier phase positioning" in the aforementioned term introduction, which will not be repeated here.

[0144] In order to distinguish the reference signals sent by different transmitting terminals, optionally, the reference signal can also be scrambled by the terminal device information of the transmitting terminal, and the terminal device information is used to identify the transmitting device of the reference signal. Exemplarily, the terminal device information can be the identifier of the terminal device or the radio network temporary identifier (Radio Network Temporary Identifier, RNTI), such as C-RNTI (cell-RNTI), TC-RNTI (Temporary C-RNTI), SI-RNTI (System Information RNTI), I-RNTI. Among them, I-RNTI is carried in UE-identify in the paging message and is used to wake up the terminal device in the inactive state. I-RNTI is divided into full I-RNTI and short I-RNTI. The identification information of the terminal device can also be UE ID, for example, source layer 2 identifier (source layer2-ID), international mobile subscriber identity (international mobile subscriber identity, IMSI), temporary mobile subscriber identify (temporary mobile subscriber identify, TMSI) or packet domain mobile temporary user identity (packet temporary mobile subscriber identify, P-TMSI), etc. Using terminal device information scrambling can make it easier for network devices to distinguish multiple terminal devices and thus locate multiple terminal devices.

[0145] Taking the scrambling of a reference signal as an example, after the terminal device modulates the carrier signal, a modulated signal is obtained, and the modulated signal is further scrambled using the terminal device information to obtain the scrambled modulated signal, namely the reference signal.

[0146] The following is an example of how to obtain a reference signal based on a carrier signal:

[0147] Method 1: A reference signal can be obtained based on a carrier signal, and the frequency of the reference signal is the same as the frequency of the carrier signal.

[0148] Exemplarily, at least one carrier signal received by the terminal device includes a first carrier signal and a second carrier signal, and the first carrier signal and the second carrier signal may be any two carrier signals in the at least one carrier signal. The at least two reference signals sent by the terminal device may include a first reference signal and a second reference signal, and the first reference signal may be a modulation signal of the first carrier signal, and the second reference signal may be a modulation signal of the second carrier signal. The first reference signal is a modulation signal of the first carrier signal, which can be understood as the first reference signal obtained after the first carrier signal is modulated, and the second reference signal is a modulation signal of the second carrier signal, which can be understood as the second reference signal obtained after the second carrier signal is modulated. Among them, the frequency of the first reference signal is the same as the frequency of the first carrier signal, and the frequency of the second reference signal is the same as the frequency of the second carrier signal. That is to say, in mode 1, after receiving the first carrier signal or the second carrier signal, the terminal device directly modulates the carrier signal to obtain a modulated signal. At this time, the terminal device does not perform frequency domain shifting on the carrier signal. Optionally, after modulating the first carrier signal, the terminal device may further use the terminal device information to scramble the modulated signal to obtain the scrambled modulated signal, that is, the first reference signal. After the terminal device modulates the second carrier signal, the terminal device may further use the terminal device information to scramble the modulated signal to obtain a scrambled modulated signal, namely, a second reference signal.

[0149] Method 2: Multiple reference signals can be obtained based on one carrier signal.

[0150] In some embodiments, the frequencies of any two reference signals among the multiple reference signals may be different. In other words, the frequencies of the multiple reference signals are different from each other.

[0151] Exemplarily, at least one carrier signal received by the terminal device includes a first carrier signal, and at least two reference signals sent by the terminal device include a first reference signal and a second reference signal, the first reference signal is a first modulation signal of the first carrier, and the second reference signal is a second modulation signal of the first carrier signal. Among them, the frequency of the first reference signal is separated from the frequency of the first carrier signal by a first offset, and the frequency of the second reference signal is separated from the frequency of the first carrier signal by a second offset. Exemplarily, if the first offset and the second offset are different, therefore, the frequency of the first reference signal is different from the frequency of the second reference signal. In some implementations, the first offset and the second offset may also be the same.

[0152] Specifically and optionally, the terminal device may perform a first frequency shift on the first carrier signal, the offset of the first frequency shift being the first offset, further modulate the first carrier signal after the first frequency shift to obtain a first modulated signal, and use the first modulated signal as the first reference signal. The terminal device may perform a second frequency shift on the first carrier signal, the offset of the second frequency shift being the second offset, further modulate the first carrier signal after the second frequency shift to obtain a second modulated signal, and use the second modulated signal as the second reference signal.

[0153] In one possible implementation, the frequencies of the first reference signal and the second reference signal may be determined by frequency indication information, and the frequency indication information may indicate the first offset and the second offset; or, the frequency indication information may directly indicate the frequency of the first reference signal and the frequency of the second reference signal, which is not limited in this application.

[0154] The frequency indication information may be predefined (eg, specified by a protocol), preconfigured, or configured by a network device, for example, configured through at least one of the following: a paging message, a NAS message, an RRC signaling, a MAC CE, and a DCI.

[0155] The frequency indication information in the embodiment of the present application may be included in the reference signal configuration information, and the reference signal configuration information is used to configure the at least two reference signals. Exemplarily, the reference signal configuration information may also include the time-frequency domain resources where the at least two reference signals are located and the transmission time interval of the at least two reference signals. For detailed description of each information in the reference signal configuration information, please refer to Figure 3Step 303 in the embodiment is not described in detail. In some implementations, the frequency indication information may not be included in the reference signal configuration information, that is, the reference signal configuration information and the frequency indication information are different information. In this implementation, the reference signal configuration information may include the time-frequency domain resources and / or the transmission time interval of the reference signal. The transmission time interval may refer to the time interval between two reference signals with adjacent transmission times. If the frequency indication information and the reference signal configuration information are different information, the frequency indication information may be sent through the same signaling or through different signaling as the reference signal configuration information, and this application does not limit this.

[0156] Please refer to Figure 3 , is a flow chart of another signal transmission method provided in an embodiment of the present application, such as Figure 3 As shown, the signal transmission method includes but is not limited to the following steps:

[0157] 301, the network device sends an activation signal, the activation signal indicating that positioning needs to be triggered. Correspondingly, the terminal device receives the activation signal.

[0158] In some embodiments, the activation signal may indicate that a positioning demand has arrived and positioning needs to be triggered. The activation signal indicating the need to trigger positioning can be understood as the activation signal indicating that the terminal device needs to wake up to receive the carrier signal and send a reference signal for positioning. Therefore, after the terminal device receives the carrier signal, it modulates the carrier signal to obtain a modulated signal, and uses the modulated signal as a reference signal for positioning. Exemplarily, the terminal device modulates the modulated signal using a pseudo-random sequence or a defined sequence (such as a gold sequence, a ZC sequence, etc.) to obtain a reference signal for positioning. The reference signal in the embodiment of the present application can be understood as a modulated signal carrying a pseudo-random sequence.

[0159] Exemplarily, the activation signal may be carried in a first message, and the first message may be at least one of the following: a paging message, a NAS message, an RRC signaling, a MAC CE, and a DCI. The paging message may include a short message.

[0160] Specifically, the first message may be an RRC signaling, or a MAC CE, or a DCI.

[0161] If the activation signal is indicated through RRC signaling, it can be an RRCResume message, RRCRelease message, RRCReconfiguration message, paging message, etc. Specifically, a positioning activation indication can be added to the above RRC message to indicate that a positioning demand has arrived and the positioning needs to be triggered. Exemplarily, if it is a paging message, a bit can be added to the paging SMS to indicate that a positioning demand has arrived and the positioning needs to be triggered; or, the user identifier in the paging record in the paging message content is set to a special value, such as setting the first user identifier in the paging record to all "0" or all "1" to indicate that a positioning demand has arrived and the positioning needs to be triggered.

[0162] If the activation signal is indicated by a MAC CE, a new MAC CE can be added to indicate that a positioning demand has arrived and positioning needs to be triggered. For example, a positioning activation indication is added to the newly added MAC CE to instruct the terminal device to wake up and receive the carrier signal, and modulate the carrier signal to obtain a reference signal for positioning.

[0163] If the activation signal is indicated through DCI, a new DCI format may be added to indicate that a positioning demand has arrived and positioning needs to be triggered; or, a new positioning activation indication may be added in a field of DCI to indicate that a positioning demand has arrived and positioning needs to be triggered.

[0164] Another optional method is to define a first instruction identifier, which directly indicates that the first message is an activation signal, and after the terminal device receives the first instruction identifier in the first message, it can know that it needs to prepare to receive a carrier signal and use a pseudo-random sequence to modulate the carrier signal to obtain a reference signal for positioning.

[0165] In some implementations, the activation signal may also indicate carrier signal configuration information, where the carrier signal configuration information is used to indicate at least one carrier signal configuration information that the network device will send to the terminal device. This facilitates the terminal device to receive at least one carrier signal according to the carrier signal configuration information. For a description of the carrier signal configuration information, please refer to Figure 2a The carrier signal configuration information of the embodiment, that is, the description related to step 200, will not be repeated here.

[0166] The network device may send the activation signal in a broadcasting manner or in a unicasting manner. For example, if multiple terminal devices need to be located, the network device may broadcast the activation signal.

[0167] 302. The network device sends at least one carrier signal, and correspondingly, the terminal device receives the at least one carrier signal.

[0168] Please refer to step 202 of this embodiment of the present application. Figure 2a Step 101 of the embodiment will not be described in detail here.

[0169] 303. The network device sends reference signal configuration information to the terminal device, and correspondingly, the terminal device receives the reference signal configuration information.

[0170] In an embodiment of the present application, the terminal device may send at least two reference signals according to the reference signal configuration information, and the reference signal configuration information is used to configure at least two reference signals. Exemplarily, the reference signal configuration information may include at least one of the following: frequency indication information, the time-frequency domain resources where the at least two reference signals are located, and the sending time interval of the at least two reference signals. Among them, the frequency indication information is used to indicate the frequency of at least two reference signals, for example, it can directly indicate the frequency of at least two reference signals, or indicate the offset relative to the frequency of the carrier signal sent by the network device. For details, please refer to the description of the second method of step 202 in the aforementioned embodiment. The sending time interval may refer to the time interval between two reference signals with adjacent sending times. The sending time interval may be in units of time units, or it may also be an absolute time difference. The time unit may include but is not limited to: slot, radio frame, subframe, mini-slot, OFDM symbol, etc.

[0171] The configuration information of the reference signal may be carried in at least one of the following: a paging message, a NAS message, an RRC signaling, a MAC CE, and a DCI. For example, the configuration information of the reference signal may be carried in one of the messages, or the configuration information of the reference signal may be carried in multiple messages. If the configuration information of the reference signal is carried in multiple messages, it may be part of the configuration information of the reference signal carried in one message. For example, if the configuration information of the reference signal is carried in a paging message and an RRC signaling, the frequency indication information of the reference signal may be carried in the paging message, and the sending time interval and the time-frequency domain resources occupied by the reference signal may be carried in the RRC signaling.

[0172] In some implementations, part of the configuration information of the reference signal may be predefined (e.g., predefined by a protocol), and part of the information may be flexibly configured. For example, the frequency offset of the reference signal may be predefined, and the time-frequency domain resources and the transmission time interval of the reference signal may be flexibly configured.

[0173] Exemplarily, the reference signal configuration information may be carried in a second message, and the second message may be at least one of the following: a paging message, a NAS message, an RRC signaling, a MAC CE, and a DCI. The paging message may include a short message.

[0174] Exemplarily, the second message may include a second instruction identifier, where the second instruction identifier is used to indicate that the second message includes reference signal configuration information, so that the terminal device sends at least two reference signals according to the reference signal configuration information.

[0175] In some implementations, the signaling type or message type of the first message containing the activation signal and the second message containing the reference signal configuration information may be the same. For example, the first message and the second message may both be paging messages.

[0176] In the embodiment of the present application, the terminal device can determine whether the message contains reference signal configuration information or an activation signal through the instruction identifier contained in the first message and the second message. For example, the first instruction identifier is used to identify that the message contains an activation signal, and the second instruction identifier is used to identify that the message contains reference signal configuration information.

[0177] The first instruction identifier and the second instruction identifier may be predefined instruction identifiers, that is, different identifiers assigned by the network device to different instructions. For example, 00 is used to indicate that the message contains an activation signal, 01 is used to indicate that the message contains reference signal configuration information, and 10 and 11 may be left blank for subsequent expansion.

[0178] Taking a paging message as an example, one or two bits may be added to the paging short message to carry the command identifier. When the network device uses MAC CE / RRC / DCI, bits may also be added to MAC CE / RRC / DCI to carry the command identifier.

[0179] 304, the terminal device sends at least two reference signals, the at least two reference signals are modulation signals of the at least one carrier signal, and the at least two reference signals are used for positioning. Correspondingly, the network device receives the at least two reference signals.

[0180] The terminal device may send the at least two reference signals according to the reference signal configuration information.

[0181] Please refer to step 304 of this embodiment of the present application. Figure 2a Step 202 of the embodiment.

[0182] Combine the following Figure 4a and Figure 4b The signal transmission method in the embodiment of the present application is illustrated by way of example. Figure 4a and Figure 4b In this example, the network device is gNB and the terminal device is tag. Tag is a passive device or a device with very limited energy storage capacity.

[0183] like Figure 4aAs shown, it is an example of a signal transmission method provided in an embodiment of the present application. Figure 4a In the example, a carrier signal can obtain a reference signal, and the frequency of the reference signal is the same as the frequency of the carrier signal. The signal transmission method may include all or part of the following steps, which are not limited in this application. The following is an example of each step in the signal transmission method:

[0184] 401, LCS client / application function (AF) / (User Equipment, UE) sends a positioning request to the access and mobility management function (AMF).

[0185] The LCS client or AF or UE can trigger a positioning request and send a positioning request to the AMF.

[0186] 402. AMF sends a positioning request to LMF.

[0187] After receiving the location request from the LCS client / AF / UE, the AMF sends a location request to the LMF. In some implementations, the AMF may also trigger a location request.

[0188] 403, LMF sends a positioning request to AMF.

[0189] 404. AMF sends a positioning request to gNB.

[0190] LMF can send a positioning request to gNB through AMF.

[0191] 405. The gNB sends an activation signal to the Tag.

[0192] The activation signal is used to indicate the need to trigger positioning. Further, optionally, the activation signal may also indicate carrier signal configuration information. For example, the activation signal also indicates that the frequency of the first carrier signal is f1, and the frequency of the second carrier signal is f2. Optionally, the activation signal may also indicate the time-frequency domain resources of the first carrier signal and the second carrier signal.

[0193] 406. The gNB sends a first carrier signal to the Tag, where the frequency of the first carrier signal is f1.

[0194] 407. gNB sends a second carrier signal to Tag, where the frequency of the second carrier signal is f2.

[0195] 408. Tag sends a first reference signal to gNB, where the frequency of the first reference signal is f1.

[0196] The tag receives the first carrier signal, modulates the first carrier signal to obtain a modulated signal, and scrambles the modulated signal to obtain a first reference signal, wherein the frequency of the first reference signal is the same as the frequency of the first carrier signal, which is f1. In some implementations, the tag may scramble the first reference signal with its own tag information so that the network device can determine that the first reference signal is sent by the tag.

[0197] 409. Tag sends a second reference signal to gNB, where the frequency of the second reference signal is f2.

[0198] The tag receives the second carrier signal, modulates the second carrier signal to obtain a modulated signal, and scrambles the modulated signal to obtain a second reference signal, wherein the frequency of the second reference signal is the same as the frequency of the second carrier signal, which is f2. In some implementations, the tag can also scramble the second reference signal with its own tag information so that the network device can determine that the second reference signal is sent by the tag.

[0199] 410. The gNB measures the reference signal and obtains a measurement result.

[0200] The measurement result includes but is not limited to one or more of the following: carrier phase, carrier phase difference, signal incident angle information, reference signal received power (reference signal received power, RSRP) or reference signal received power path (reference signal received power path, RSRPP).

[0201] 411, gNB sends the measurement result to LMF.

[0202] 412, LMF estimates the position of the Tag according to the measurement result to obtain a result of the Tag position estimation.

[0203] 413. LMF sends a positioning response to AMF, where the positioning response includes the location estimation result of the Tag.

[0204] 414. AMF sends a positioning response to the LCS client / AF / UE.

[0205] For example, the measurement result may include the phase of the reference signal, which is used by LMF to calculate the phase difference, so as to further determine the distance between the Tag and the gNB based on the phase difference (the specific determination method can refer to the description of the aforementioned carrier phase positioning). LMF needs to calculate the distance between the Tag and at least three gNBs, and the positions of the at least three gNBs are known. Based on three-point positioning, the position estimation result of the Tag can be determined. For example, when estimating the position of the Tag using carrier phase positioning, the modulation method cannot use phase modulation, but can only use amplitude modulation or frequency modulation.

[0206] For another example, the measurement results include RSRP. RSRP usually has a certain relationship with the distance. Therefore, LMF can determine the distance between the Tag and the gNB based on the RSRP of the reference signal measured by the Tag. LMF needs to calculate the distance between the Tag and at least three gNBs. The positions of the at least three gNBs are known. Based on three-point positioning, the position estimation result of the Tag can be determined.

[0207] like Figure 4b As shown, another example of the signal transmission method provided in the embodiment of the present application is shown. Figure 4b In the example, one carrier signal can obtain two reference signals, and the two reference signals have different frequencies. The signal transmission method may include all or part of the following steps, which are not limited in this application. The following is an example of each step in the signal transmission method:

[0208] 501, LCS client / AF / UE sends a positioning request to AMF.

[0209] 502. AMF sends a positioning request to LMF.

[0210] 503, LMF sends a positioning request to AMF.

[0211] 504. AMF sends a positioning request to gNB.

[0212] Steps 401 to 404 of this embodiment of the present application can refer to Figure 4a Steps 301 to 304 of the embodiment are not described in detail here.

[0213] 505. gNB sends reference signal configuration information to Tag.

[0214] Exemplarily, the reference signal configuration information may include frequency indication information for sending the reference signal by the tag, for example, the frequency indication information may indicate frequency f1 and frequency f2, or the frequency indication information may indicate an offset relative to the frequency of the carrier signal. Optionally, the reference signal configuration information may also include other information, which may be specifically referred to the description of the aforementioned embodiment and will not be repeated here.

[0215] 506. The gNB sends an activation signal to the Tag.

[0216] The activation signal is used to indicate that positioning needs to be triggered. Further optionally, the activation signal may also indicate carrier signal configuration information, for example, may indicate the frequency point f0 of the carrier signal. The description of the carrier signal configuration information may refer to the description of the above embodiment.

[0217] 507, gNB sends a carrier signal to Tag, and the frequency of the carrier signal is f0.

[0218] 508. Tag sends a first reference signal to gNB, where the frequency of the reference signal is f1.

[0219] Tag receives a first carrier signal and performs a first frequency shift on the first carrier signal. The first offset of the first frequency shift can be f1-f0. The first carrier signal after the first frequency shift is modulated to obtain a first modulated signal. The first modulated signal can be further scrambled to obtain a first reference signal. The frequency point of the first reference signal is f1.

[0220] 509. Tag sends a second reference signal to gNB, where the frequency of the reference signal is f2.

[0221] Tag receives the first carrier signal and performs a second frequency shift on the first carrier signal. The second offset of the second frequency shift can be f2-f0. The first carrier signal after the second frequency shift is modulated to obtain a second modulated signal. The second modulated signal is further scrambled to obtain a second reference signal. The frequency point of the second reference signal is f2.

[0222] 510, the gNB measures the reference signal and obtains a measurement result.

[0223] The measurement result may include but is not limited to: carrier phase, carrier phase difference, signal incident angle information, RSRP or RSRPP.

[0224] 511, gNB sends the measurement result to LMF.

[0225] 512, LMF estimates the position of the Tag according to the measurement result to obtain a result of the Tag position estimation.

[0226] 513. LMF sends a positioning response to AMF, where the positioning response includes the location estimation result of the Tag.

[0227] 514. AMF sends a positioning response to the LCS client / AF / UE.

[0228] Steps 511 to 514 of the present application embodiment can refer to Figure 4a Steps 411 to 414 of the embodiment are not described in detail here.

[0229] In the above Figure 4a and Figure 4b The location of the gNB is known, and the location of the tag is estimated using at least three gNBs with known locations. Figure 4c The description is to estimate the position of the UE using at least three tags whose positions are known.

[0230] like Figure 4c As shown, it is another example of the signal transmission method provided in the embodiment of the present application. Figure 4c In the example, the positions of Tag1, Tag2 and Tag3 are known, as described below:

[0231] 601, UE1 generates or receives a positioning request;

[0232] That is, UE1 needs to locate the position of UE1, or UE1 receives a positioning request, and the positioning request needs to determine the position of UE1.

[0233] 602. UE1 sends activation signal 1 to Tag1.

[0234] Among them, activation signal 1 can be used to indicate that Tag1 needs to trigger positioning, that is, Tag1 needs to receive a carrier signal and modulate the carrier signal to obtain a reference signal for positioning. The activation signal can also include configuration information of carrier signal 1.

[0235] 603, UE1 sends carrier signal 1 to Tag1.

[0236] Exemplarily, UE1 may send carrier signal 1 to Tag1. Carrier signal 1 may include at least one carrier signal. The frequency points of the at least one carrier signal may be different. For the convenience of description, the carrier signals sent by UE1 to Tag1 are collectively referred to as carrier signal 1.

[0237] 604. UE1 sends activation signal 2 to Tag2.

[0238] Among them, activation signal 2 can be used to indicate that Tag2 needs to trigger positioning, that is, Tag2 needs to receive a carrier signal and modulate the carrier signal to obtain a reference signal for positioning. The activation signal can also include configuration information of carrier signal 2.

[0239] 605, UE1 sends carrier signal 2 to Tag2.

[0240] Exemplarily, UE1 may send carrier signal 2 to Tag2. Carrier signal 2 may include at least one carrier signal. The frequency points of the at least one carrier signal may be different. For the convenience of description, the carrier signals sent by UE1 to Tag2 are collectively referred to as carrier signal 2.

[0241] 606. UE1 sends activation signal 3 to Tag3.

[0242] Among them, activation signal 3 can be used to indicate that Tag3 needs to trigger positioning, that is, Tag3 needs to receive a carrier signal and modulate the carrier signal to obtain a reference signal for positioning. The activation signal can also include configuration information of carrier signal 3.

[0243] 607, UE1 sends carrier signal 3 to Tag3.

[0244] Exemplarily, UE1 may send carrier signal 3 to Tag3. Carrier signal 3 may include at least one carrier signal. The frequency points of the at least one carrier signal may be different. For the convenience of description, the carrier signals sent by UE1 to Tag3 are collectively referred to as carrier signal 3.

[0245] 608. Tag1 sends reference signal 1 to UE1.

[0246] The reference signal 1 may include at least two reference signals, and the frequencies of the at least two signals may be different. The reference signal 1 may be a modulated signal of the carrier signal 1, wherein the reference signal 1 being a modulated signal of the carrier signal 1 may be understood as at least two reference signals in the reference signal 1 may be modulated signals of at least one carrier signal included in the carrier signal 1.

[0247] 609, Tag2 sends reference signal 2 to UE1.

[0248] The reference signal 2 may include at least two reference signals, and the frequencies of the at least two signals may be different. The reference signal 2 may be a modulated signal of the carrier signal 2, wherein the reference signal 2 is a modulated signal of the carrier signal 2, which can be understood as at least two reference signals in the reference signal 2 may be modulated signals of at least one carrier signal included in the carrier signal 2.

[0249] 610, Tag3 sends reference signal 3 to UE1.

[0250] The reference signal 3 may include at least two reference signals, and the frequencies of the at least two signals may be different. The reference signal 3 may be a modulated signal of the carrier signal 3, wherein the reference signal 3 is a modulated signal of the carrier signal 3, which can be understood as at least two reference signals in the reference signal 3 may be modulated signals of at least one carrier signal included in the carrier signal 3.

[0251] 611, UE1 measures the reference signal and obtains a measurement result.

[0252] The measurement results may include the carrier phase of each reference signal, the carrier phase difference, the incident angle information of the signal, RSRP or RSRPP.

[0253] 612. UE1 sends the measurement result to LMF.

[0254] 613, LMF estimates the position of UE1 according to the measurement result.

[0255] 614, LMF sends the location estimation result of UE1 to UE1.

[0256] Since the positions of Tag1, Tag2 and Tag3 are known, based on the three-point positioning principle, LMF can estimate the position of UE1 according to the measurement results of the reference signal and the positions of Tag1, Tag2 and Tag3.

[0257] See also Figure 5 , Figure 5 It is a structural diagram of a communication device provided in an embodiment of the present application. The communication device is applied to a terminal device. Exemplarily, the communication device can be a terminal device or a device in a terminal device, for example, it can be a chip or chip module in the terminal device, or a device that can be used in combination with the terminal device. Figure 5 The communication device 100 shown may include a sending unit 110 and a receiving unit 120, wherein:

[0258] The receiving unit 120 is configured to receive at least one carrier signal;

[0259] The sending unit 110 is used to send at least two reference signals, where the at least two reference signals are modulation signals of the at least one carrier signal, and the at least two reference signals are both used for positioning.

[0260] In a possible implementation manner, different reference signals in the at least two reference signals have different frequencies.

[0261] In a possible implementation manner, the at least one carrier signal includes a first carrier signal and a second carrier signal, and the at least two reference signals include a first reference signal and a second reference signal;

[0262] The first reference signal is a modulation signal of the first carrier signal, and the second reference signal is a modulation signal of the second carrier signal;

[0263] The frequency of the first reference signal is the same as the frequency of the first carrier signal, and the frequency of the second reference signal is the same as the frequency of the second carrier signal.

[0264] In a possible implementation manner, the at least one carrier signal includes a first carrier signal, and the at least two reference signals include a first reference signal and a second reference signal;

[0265] The first reference signal is a first modulation signal of the first carrier signal, and the second reference signal is a second modulation signal of the first carrier signal;

[0266] The frequency point of the first reference signal is spaced from the frequency point of the first carrier signal by a first offset; the frequency point of the second reference signal is spaced from the frequency point of the first carrier signal by a second offset.

[0267] In a possible implementation, the receiving unit 120 is further configured to receive frequency indication information;

[0268] The frequency indication information indicates the first offset and the second offset; or the frequency indication information indicates the frequency of the first reference signal and the frequency of the second reference signal.

[0269] In a possible implementation, the first reference signal and the second reference signal are both scrambled by terminal device information, and the terminal device information identifies a sending device of the at least two reference signals.

[0270] In a possible implementation manner, the terminal device information is an identifier of the terminal device or a wireless network temporary identifier.

[0271] In a possible implementation, the receiving unit 120 is further configured to receive an activation signal, where the activation signal indicates triggering positioning.

[0272] In a possible implementation manner, the activation signal further indicates carrier signal configuration information, and the carrier signal configuration information is used to configure the at least one carrier signal.

[0273] In one possible implementation, the carrier signal configuration information indicates at least one of the following: the frequency of the at least one carrier signal, the time-frequency domain resources occupied by the at least one carrier signal, the duration of the at least one carrier signal, the bandwidth of the at least one carrier signal, the transmission period of the at least one carrier signal, the number of repetitions of the at least one carrier signal, the mute configuration of the at least one carrier signal, and the starting time domain position of the at least one carrier signal.

[0274] In a possible implementation manner, the activation signal is carried in at least one of the following information: a paging message, a non-access stratum NAS message, a radio resource control protocol RRC signaling, a media access control element MAC CE, and downlink control information DCI.

[0275] In a possible implementation manner, the receiving unit 120 is further configured to receive reference signal configuration information, where the reference signal configuration information is used to configure the at least two reference signals.

[0276] In a possible implementation manner, the reference signal configuration information is carried in at least one of the following information: a paging message, a NAS message, an RRC signaling, a MAC CE, and a DCI.

[0277] about Figure 5 The specific embodiment description can refer to Figure 2a-Figure 3 The description of the embodiments will not be repeated here.

[0278] Reuse Figure 5 The communication device can be applied to a network device. Exemplarily, the communication device can be a network device or a device in a network device, for example, it can be a chip or a chip module in the network device, or a device that can be used in conjunction with the network device. Figure 5 The communication device 100 shown may include a sending unit 110 and a receiving unit 120, wherein:

[0279] The sending unit 110 is configured to send at least one carrier signal;

[0280] The receiving unit 120 is used to receive at least two reference signals, where the at least two reference signals are modulation signals of the at least one carrier signal, and the at least two reference signals are both used for positioning.

[0281] In a possible implementation manner, different reference signals in the at least two reference signals have different frequencies.

[0282] In a possible implementation manner, the at least one carrier signal includes a first carrier signal and a second carrier signal, and the at least two reference signals include a first reference signal and a second reference signal;

[0283] The first reference signal is a modulation signal of the first carrier signal, and the second reference signal is a modulation signal of the second carrier signal;

[0284] The frequency of the first reference signal is the same as the frequency of the first carrier signal, and the frequency of the second reference signal is the same as the frequency of the second carrier signal.

[0285] In a possible implementation manner, the at least one carrier signal includes a first carrier signal, and the at least two reference signals include a first reference signal and a second reference signal;

[0286] The first reference signal is a first modulation signal of the first carrier signal, and the second reference signal is a second modulation signal of the first carrier signal;

[0287] The frequency point of the first reference signal is spaced from the frequency point of the first carrier signal by a first offset; the frequency point of the second reference signal is spaced from the frequency point of the first carrier signal by a second offset.

[0288] In a possible implementation, the sending unit 110 is further configured to send frequency indication information;

[0289] The frequency indication information indicates the first offset and the second offset; or the frequency indication information indicates the frequency of the first reference signal and the frequency of the second reference signal.

[0290] In a possible implementation, the first reference signal and the second reference signal are both scrambled by terminal device information, and the terminal device information identifies a sending device of the at least two reference signals.

[0291] In a possible implementation manner, the terminal device information is an identifier of the terminal device or a wireless network temporary identifier.

[0292] In a possible implementation, the sending unit 110 is further configured to send an activation signal, where the activation signal indicates triggering backscatter positioning.

[0293] In a possible implementation manner, the activation signal further indicates carrier signal configuration information, and the carrier signal configuration information is used to configure the at least one carrier signal.

[0294] In one possible implementation, the carrier signal configuration information indicates at least one of the following: the frequency of the at least one carrier signal, the time-frequency domain resources occupied by the at least one carrier signal, the duration of the at least one carrier signal, the bandwidth of the at least one carrier signal, the transmission period of the at least one carrier signal, the number of repetitions of the at least one carrier signal, the mute configuration of the at least one carrier signal, and the starting time domain position of the at least one carrier signal.

[0295] In a possible implementation manner, the activation signal is carried in at least one of the following information: a paging message, a non-access stratum NAS message, a radio resource control protocol RRC signaling, a media access control element MAC CE, and downlink control information DCI.

[0296] In a possible implementation manner, the sending unit 110 is further configured to send reference signal configuration information, where the reference signal configuration information is used to configure the at least two reference signals.

[0297] In a possible implementation manner, the reference signal configuration information is carried in at least one of the following information: a paging message, a NAS message, an RRC signaling, a MAC CE, and a DCI.

[0298] about Figure 5 The specific embodiment description can refer to Figure 2a-Figure 3 The description of the embodiments will not be repeated here.

[0299] See also Figure 6 , Figure 6 is a schematic diagram of a communication device provided in an embodiment of the present application, which is used to implement the above Figure 2a-Figure 3 The functions of the terminal device in the Figure 2a-Figure 3 The communication device 300 may be a terminal device or a device for a terminal device. The device for a terminal device may be a chip system or a chip in a terminal device. The communication device may also be a network device or a device for a network device. The device for a network device may be a chip system or a chip in a network device. Among them, the chip system may be composed of a chip, or may include a chip and other discrete devices.

[0300] The communication device 300 includes at least one processor 320, which is used to implement the data processing function of the terminal device or network device in the method provided in the embodiment of the present application. The communication device 300 may also include a communication interface 310, which is used to implement the transceiver operation of the terminal device or network device in the method provided in the embodiment of the present application. In the embodiment of the present application, the processor 320 may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. In the embodiment of the present application, the communication interface 310 may be a transceiver, circuit, bus, module or other type of communication interface, which is used to communicate with other devices through a transmission medium. For example, the communication interface 310 is used for the communication device 300 to communicate with other devices. The processor 320 uses the communication interface 310 to send and receive data and is used to implement the above method embodiment. Figure 2a-Figure 3 The method described.

[0301] The communication device 300 may also include at least one memory 330 for storing program instructions and / or data. The memory 330 is coupled to the processor 320. The coupling in the embodiment of the present application is an indirect coupling or communication connection between devices, units or modules, which may be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules. The processor 320 may operate in conjunction with the memory 330. The processor 320 may execute program instructions stored in the memory 330. At least one of the at least one memory may be included in the processor.

[0302] When the communication device 300 is turned on, the processor 320 can read the software program in the memory 330, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 320 performs baseband processing on the data to be sent and outputs the baseband signal to the RF circuit ( Figure 6 The RF circuit processes the baseband signal and then transmits the RF signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the communication device 300, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor 320, which converts the baseband signal into data and processes the data.

[0303] In another implementation, the RF circuit and antenna may be arranged independently from the processor 320 that performs baseband processing. For example, in a distributed scenario, the RF circuit and antenna may be arranged independently from the device in a remote manner.

[0304] The specific connection medium between the communication interface 310, the processor 320 and the memory 330 is not limited in the embodiment of the present application. Figure 6 In the embodiment, the memory 330, the processor 320 and the communication interface 310 are connected via a bus 340. Figure 6 The connections between the other components are shown in bold lines, which are only for illustration and are not intended to be limiting. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 6 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0305] When the communication device 300 is specifically used in a terminal device, for example, when the communication device 300 is specifically a chip or a chip system, the communication interface 310 may output or receive a baseband signal. When the communication device 300 is specifically a terminal device, the communication interface 310 may output or receive a radio frequency signal.

[0306] It should be noted that the device can execute the relevant steps of the terminal device or network device in the aforementioned method embodiment. For details, please refer to the implementation methods provided in the above steps, which will not be repeated here.

[0307] For each device or product applied to or integrated in the device, each module contained therein can be implemented in the form of hardware such as circuits, and different modules can be located in the same component (for example, a chip, circuit module, etc.) or in different components in the terminal, or at least some of the modules can be implemented in the form of a software program that runs on a processor integrated inside the terminal, and the remaining (if any) modules can be implemented in the form of hardware such as circuits.

[0308] The above-mentioned memory may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable ROM (PROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM) or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of random access memory (RAM) are available, such as static ram (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0309] The present application provides a chip. The chip includes: a processor and a memory. The number of the processors can be one or more, and the number of the memories can be one or more. The processor can execute the above instructions and data stored in the memory by reading the instructions and data stored in the memory. Figure 2a-Figure 3 The method shown in and the steps performed by the relevant implementation methods.

[0310] like Figure 7 As shown, Figure 7 400 can execute the steps of the terminal device in the above method embodiment, or the module device 400 can execute the steps of the network device in the above method embodiment.

[0311] The module device 400 includes: a communication module 410, a power module 420, a storage module 430 and a chip module 440. The power module 420 is used to provide power to the module device; the storage module 430 is used to store data and / or instructions; the communication module 410 is used to communicate with external devices; the chip module 440 is used to call the data and / or instructions stored in the storage module 430, and in combination with the communication module 410, the above-mentioned Figure 2a-Figure 3 The method shown, and the steps performed by the relevant implementation method.

[0312] The present application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and the computer program includes program instructions. When the electronic device executes the program instructions, the above Figure 2a-Figure 3 The steps performed by the terminal device in the method shown, or the implementation of the above Figure 2a-Figure 3 The steps performed by the network device in the method shown.

[0313] The computer-readable storage medium may be an internal storage unit of the terminal device or network device described in any of the foregoing embodiments, such as a hard disk or memory of the device. The computer-readable storage medium may also be an external storage device of the terminal device or network device, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the device. Further, the computer-readable storage medium may also include both an internal storage unit of the terminal device or network device and an external storage device. The computer-readable storage medium is used to store the computer program and other programs and data required by the terminal device or network device. The computer-readable storage medium may also be used to temporarily store data that has been output or is to be output. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media sets. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a high-density digital video disc (DVD)), or a semiconductor medium. The semiconductor medium may be a solid-state hard disk.

[0314] Regarding the various modules / units included in the various devices and products described in the above embodiments, they can be software modules / units, or hardware modules / units, or they can be partially software modules / units and partially hardware modules / units. For example, for various devices and products applied to or integrated in a chip, the various modules / units included therein can all be implemented in the form of hardware such as circuits, or at least some of the modules / units can be implemented in the form of software programs, which run on a processor integrated inside the chip, and the remaining (if any) modules / units can be implemented in the form of hardware such as circuits; for various devices and products applied to or integrated in a chip module, the various modules / units included therein can all be implemented in the form of hardware such as circuits, and different modules / units can be located in the same component of the chip module (such as a chip, circuit module, etc.) or in different components, or at least some of the modules / units can be implemented in the form of software programs. It is implemented in the form of a software program, which runs on a processor integrated inside the chip module, and the remaining (if any) modules / units can be implemented in hardware such as circuits; for each device or product applied to or integrated in the data acquisition node, each module / unit contained therein can be implemented in hardware such as circuits, and different modules / units can be located in the same component (for example, chip, circuit module, etc.) or in different components in the terminal, or, at least some modules / units can be implemented in the form of a software program, which runs on a processor integrated inside the data acquisition node, and the remaining (if any) modules / units can be implemented in hardware such as circuits.

[0315] The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination thereof. When implemented using software, the above embodiments may 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 or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired or wireless means.

[0316] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0317] In the several embodiments provided in the present application, it should be understood that the disclosed methods, devices and systems can be implemented in other ways. For example, the device embodiments described above are merely schematic; for example, the division of the units is only a logical function division, and there may be other division methods in actual implementation; for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that 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.

[0318] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0319] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0320] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a gateway node, etc.) to perform some steps of the method described in each embodiment of the present invention.

[0321] A person skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0322] What is disclosed above is only a preferred embodiment of the present application, and it certainly cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiment and equivalent changes made according to the claims of the present application are still within the scope covered by the application.

Claims

1. A signal transmission method, characterized in that: The method comprises: receiving at least one carrier signal; At least two reference signals are sent, where the at least two reference signals are modulation signals of the at least one carrier signal, and both of the at least two reference signals are used for positioning.

2. The method according to claim 1, characterized in that Different reference signals in the at least two reference signals have different frequencies.

3. The method according to claim 1 or 2, characterized in that The at least one carrier signal includes a first carrier signal and a second carrier signal, and the at least two reference signals include a first reference signal and a second reference signal; The first reference signal is a modulation signal of the first carrier signal, and the second reference signal is a modulation signal of the second carrier signal; The frequency of the first reference signal is the same as the frequency of the first carrier signal, and the frequency of the second reference signal is the same as the frequency of the second carrier signal.

4. The method according to claim 1 or 2, characterized in that: The at least one carrier signal comprises a first carrier signal, and the at least two reference signals comprise a first reference signal and a second reference signal; The first reference signal is a first modulation signal of the first carrier signal, and the second reference signal is a second modulation signal of the first carrier signal; The frequency point of the first reference signal is spaced from the frequency point of the first carrier signal by a first offset; the frequency point of the second reference signal is spaced from the frequency point of the first carrier signal by a second offset.

5. The method according to claim 4, characterized in that The method further comprises: Receiving frequency indication information; The frequency indication information indicates the first offset and the second offset; or the frequency indication information indicates the frequency of the first reference signal and the frequency of the second reference signal.

6. The method according to claim 3 or 4, characterized in that: The first reference signal and the second reference signal are both scrambled by terminal device information, and the terminal device information identifies a sending device of the at least two reference signals.

7. The method according to claim 6, characterized in that The terminal device information is an identifier of the terminal device or a wireless network temporary identifier.

8. The method according to claim 1, characterized in that The method further comprises: An activation signal is received, the activation signal indicating that positioning needs to be triggered.

9. The method according to claim 8, characterized in that The activation signal further indicates carrier signal configuration information, where the carrier signal configuration information is used to configure the at least one carrier signal.

10. The method according to claim 9, characterized in that The carrier signal configuration information indicates at least one of the following: the frequency of the at least one carrier signal, the time-frequency domain resources occupied by the at least one carrier signal, the duration of the at least one carrier signal, the bandwidth of the at least one carrier signal, the transmission period of the at least one carrier signal, the number of repetitions of the at least one carrier signal, the mute configuration of the at least one carrier signal, and the starting time domain position of the at least one carrier signal.

11. The method according to any one of claims 8 to 10, characterized in that: The activation signal is carried in at least one of the following information: a paging message, a non-access layer NAS message, a radio resource control protocol RRC signaling, a media access control element MAC CE or downlink control information DCI.

12. The method according to any one of claims 1 to 11, characterized in that: The method further comprises: Reference signal configuration information is received, where the reference signal configuration information is used to configure the at least two reference signals.

13. The method according to claim 12, characterized in that The reference signal configuration information is carried in at least one of the following information: a paging message, a NAS message, an RRC signaling, a MAC CE or a DCI.

14. A signal transmission method, characterized in that: The method comprises: transmitting at least one carrier signal; At least two reference signals are received, where the at least two reference signals are modulation signals of the at least one carrier signal, and both of the at least two reference signals are used for positioning.

15. The method according to claim 14, characterized in that Different reference signals in the at least two reference signals have different frequencies.

16. The method according to claim 14 or 15, characterized in that The at least one carrier signal includes a first carrier signal and a second carrier signal, and the at least two reference signals include a first reference signal and a second reference signal; The first reference signal is a modulation signal of the first carrier signal, and the second reference signal is a modulation signal of the second carrier signal; The frequency of the first reference signal is the same as the frequency of the first carrier signal, and the frequency of the second reference signal is the same as the frequency of the second carrier signal.

17. The method according to claim 14 or 15, characterized in that The at least one carrier signal comprises a first carrier signal, and the at least two reference signals comprise a first reference signal and a second reference signal; The first reference signal is a first modulation signal of the first carrier signal, and the second reference signal is a second modulation signal of the first carrier signal; The frequency point of the first reference signal is spaced from the frequency point of the first carrier signal by a first offset; the frequency point of the second reference signal is spaced from the frequency point of the first carrier signal by a second offset.

18. The method according to claim 17, characterized in that The method further comprises: Send frequency indication information; The frequency indication information indicates the first offset and the second offset; or the frequency indication information indicates the frequency of the first reference signal and the frequency of the second reference signal.

19. The method according to claim 16 or 17, characterized in that The first reference signal and the second reference signal are both scrambled by terminal device information, and the terminal device information identifies a sending device of the at least two reference signals.

20. The method of claim 19, wherein: The terminal device information is an identifier of the terminal device or a wireless network temporary identifier.

21. The method of claim 14, wherein: The method further comprises: An activation signal is sent, wherein the activation signal indicates that positioning needs to be triggered.

22. The method according to claim 21, characterized in that The activation signal further indicates carrier signal configuration information, where the carrier signal configuration information is used to configure the at least one carrier signal.

23. The method of claim 22, wherein: The carrier signal configuration information indicates at least one of the following: the frequency of the at least one carrier signal, the time-frequency domain resources occupied by the at least one carrier signal, the duration of the at least one carrier signal, the bandwidth of the at least one carrier signal, the transmission period of the at least one carrier signal, the number of repetitions of the at least one carrier signal, the mute configuration of the at least one carrier signal, and the starting time domain position of the at least one carrier signal.

24. The method according to any one of claims 21 to 23, characterized in that The activation signal is carried in at least one of the following information: a paging message, a non-access layer NAS message, a radio resource control protocol RRC signaling, a media access control element MAC CE, and downlink control information DCI.

25. The method according to any one of claims 14 to 24, characterized in that The method further comprises: Reference signal configuration information is sent, where the reference signal configuration information is used to configure the at least two reference signals.

26. The method of claim 25, wherein: The reference signal configuration information is carried in at least one of the following information: a paging message, a NAS message, an RRC signaling, a MAC CE, and a DCI.

27. A communication device, characterized in that: include: A receiving unit, configured to receive at least one carrier signal; The sending unit is used to send at least two reference signals, where the at least two reference signals are modulation signals of the at least one carrier signal, and the at least two reference signals are both used for positioning.

28. A communication device, characterized in that: include: A sending unit, configured to send at least one carrier signal; The receiving unit is used to receive at least two reference signals, where the at least two reference signals are modulation signals of the at least one carrier signal, and both of the at least two reference signals are used for positioning.

29. A communication device, characterized in that: The communication device includes a processor and a memory, and the processor and the memory are connected to each other, wherein the memory is used to store a computer program, and the computer program includes program instructions. The processor calls the program instructions to execute the method according to any one of claims 1 to 13, or executes the method according to any one of claims 14 to 26.

30. A chip, characterized in that: The chip includes a processor and an interface, and the processor is coupled to the interface; the interface is used to receive or output signals, and the processor is used to execute code instructions, execute the method as described in any one of claims 1 to 13, or execute the method as described in any one of claims 14 to 26.

31. A module device, characterized in that: The module device includes a communication module, a power module, a storage module and a chip module, wherein: The power module is used to provide electrical energy to the module device; The storage module is used to store data and / or instructions; The communication module is used to communicate with external devices; The chip module is used to call the data and / or instructions stored in the storage module to execute the method described in any one of claims 1 to 13, or to execute the method described in any one of claims 14 to 26.

32. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, wherein the computer program includes program instructions. When a computer executes the program instructions, the method according to any one of claims 1 to 13 is implemented; or the method according to any one of claims 14 to 26 is implemented.

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