Communication method and communication device

Abstract

A communication method and a communication device are provided. The communication method includes the following steps: a terminal device receives a carrier signal and transmits a first signal; a first frequency within the frequency band of the first signal is spaced apart from the center frequency of the carrier bandwidth by a first frequency interval equal to or greater than a first frequency interval; the first frequency is a frequency within the frequency band of the first signal that has the smallest frequency interval from the center frequency of the carrier bandwidth; the interval between the first frequency and the center frequency of the carrier bandwidth is equal to or greater than the first frequency interval, which means that the first frequency within the frequency band of the first signal is far from the center frequency of the carrier bandwidth; therefore, within the frequency band of the first signal, the phase noise of the carrier signal is low; and this communication method can reduce the influence of the phase noise of the carrier signal on the first signal.

Description

[Technical Field]

[0001] [CROSS-REFERENCE TO RELATED APPLICATIONS] This application claims priority to Chinese Patent Application No. 202211724557.0, entitled "COMMUNICATION METHOD AND COMMUNICATION APPARATUS," filed with the State Intellectual Property Office of the People's Republic of China on December 30, 2022, which is incorporated herein by reference in its entirety.

[0002] [Technical field] This application relates to the field of positioning technology, and in particular to a communication method and a communication device. [Background technology]

[0003] A network may include a terminal device and at least two network devices. The at least two network devices may separately transmit carrier signals to the terminal device to provide energy for the terminal device to transmit a signal. The terminal device transmits a signal based on the received carrier signal. In this way, in addition to receiving a signal from the terminal device, one of the at least two network devices may further receive a carrier signal transmitted by another network device. To the network device, the carrier signal is an interference signal compared to the signal of the terminal device, which causes extra phase noise. As a result, the signal-to-interference-and-noise ratio of the signal received by the network device is low, and the network device's demodulation performance or detection performance for the received signal is reduced. Summary of the Invention

[0004] This application provides a communication method and a communication device for reducing the effect of phase noise on a carrier signal.

[0005] According to a first aspect, an embodiment of the present application provides a communication method. The method may be performed by a first communication device. The first communication device may be a communication device or a communication device, such as a chip system, that can support the communication device in realizing the function required by the method. For example, the first communication device is a label, or a chip disposed on the label, or other component configured to realize the function of the label. For ease of explanation, the following description will use an example in which the first communication device is a label.

[0006] The communication method includes: a label receiving a carrier signal and transmitting a first signal, the first signal having a first frequency in a frequency band of the first signal and a center frequency of the carrier bandwidth spaced apart by at least a first frequency; the first frequency being a frequency having a minimum frequency spaced apart from the center frequency of the carrier bandwidth in the frequency band of the first signal;

[0007] The interval between the first frequency in the frequency band of the first signal and the center frequency of the carrier bandwidth is equal to or greater than the first frequency interval. Specifically, the first frequency in the frequency band of the first signal is farther away from the center frequency of the carrier bandwidth. The frequency position of the signal is farther away from the center frequency of the carrier signal, which indicates lower phase noise of the signal. Therefore, the interval between the first frequency in the frequency band of the first signal and the center frequency of the carrier bandwidth is equal to or greater than the first frequency interval. As a result, the phase noise of the carrier signal in the frequency band of the first signal is low, thereby reducing the effect of the phase noise of the carrier signal on the first signal.

[0008] In the implementation, the bandwidth of the first signal is less than or equal to the absolute value of the difference between half the carrier bandwidth and the first frequency interval, and the bandwidth of the first signal is configured such that the interval between the first frequency in the frequency band of the first signal and the center frequency of the carrier bandwidth can be greater than or equal to the first frequency interval.

[0009] In the implementation, the frequency interval F between the center frequency of the first signal and the center frequency of the downlink carrier signal and the modulation data rate S used to transmit the first signal satisfy that the absolute value of FS is equal to or greater than the first frequency interval. F and S are configured to adjust the frequency band and frequency offset of the first signal, so that the interval between the first frequency in the frequency band of the first signal and the center frequency of the carrier bandwidth can be equal to or greater than the first frequency interval.

[0010] In the realization method, F is F=1 / T / R bit and S is S=1 / T / R bit / M, where T is the level duration of one symbol of the first signal, and R bit is the number of bit repetitions used for the first signal, and M is the number of Manchester encoding repetitions used for the first signal.

[0011] In an implementation, the first signal is a positioning reference signal. The solution provided in the embodiment of this application may be applied to positioning, for example, positioning based on angle of arrival (AOA). Since the phase noise of a carrier signal within the frequency band of the first signal is low, the influence of the phase noise of the carrier signal on the first signal can be reduced, and the positioning performance can be improved.

[0012] In an implementation, the method further includes: the label transmits a data signal, the bandwidth of the data signal is greater than the positioning reference signal bandwidth, the center frequency of the data signal bandwidth is the same as the center frequency of the positioning reference signal bandwidth or the center frequency of the data signal bandwidth is different from the center frequency of the positioning reference signal bandwidth, a distance between a first frequency within the positioning reference signal bandwidth and the center frequency of the carrier bandwidth is greater than a distance between a second frequency within the data signal bandwidth and the center frequency of the carrier bandwidth, the second frequency being a frequency within the data signal bandwidth and closest to the center frequency of the carrier bandwidth.

[0013] When the data signal and the first signal are independent signals, the label may also transmit the data signal in addition to transmitting the first signal. In this case, the network device may separately configure the bandwidth of the first signal and the bandwidth of the data signal. For example, the bandwidth of the data signal may be larger than the bandwidth of the first signal, and the center frequency of the bandwidth of the data signal may be the same as the center frequency of the bandwidth of the first signal. In this way, the effect of phase noise of the carrier signal on the first signal can be reduced. Furthermore, the data signal may be transmitted at a higher rate to improve data transmission efficiency. Alternatively, the center frequency of the bandwidth of the data signal may be different from the center frequency of the bandwidth of the first signal, but the distance between the first frequency within the bandwidth of the first signal and the center frequency of the carrier bandwidth is greater than the distance between the second frequency within the bandwidth of the data signal and the center frequency of the carrier bandwidth, thereby also reducing the effect of phase noise of the data signal on the first signal.

[0014] In the implementation, the label transmits a first signal by using a first number of bit repetitions and a first number of Manchester coding repetitions, and the label transmits a data signal by using a second number of bit repetitions and a second number of Manchester coding repetitions, where the first number of bit repetitions is different from the second number of bit repetitions and / or the first number of Manchester coding repetitions is different from the second number of Manchester coding repetitions.

[0015] In the above implementation, the network device configures different bit repetition numbers and / or Manchester coding repetition numbers for the first signal and the data signal transmitted by the label, so that the phase noise of the data signal within the frequency band of the first signal is low and the influence of the phase noise of the data signal on the first signal is reduced.

[0016] According to a second aspect, an embodiment of the present application provides a communication method. The method may be performed by a second communication apparatus. The first communication apparatus may be a communication device or a communication apparatus, such as a chip system, that can support the communication device in implementing the function required by the method. For example, the second communication apparatus may be a network device, a chip disposed in the network device, or another component configured to implement the function of the network device. For ease of explanation, the following description will use an example in which the first communication apparatus is a network device.

[0017] The communication method includes: a network device transmitting a carrier signal and receiving a first signal, wherein a distance between a first frequency within a frequency band of the first signal and a center frequency of the carrier bandwidth is equal to or greater than a first frequency distance, the first frequency being a frequency that has a smallest frequency distance from the center frequency of the carrier bandwidth within the frequency band of the first signal.

[0018] In the implementation, the phase noise of the carrier signal within the frequency band of the first signal is less than a first threshold, the first threshold being a power threshold of the phase noise.

[0019] In an implementation, the first signal is a positioning reference signal. The first threshold is related to positioning accuracy. Optionally, the first threshold is determined based on a minimum signal-to-interference plus noise ratio (SINR) corresponding to a target positioning accuracy.

[0020] In the implementation, the first frequency interval is determined based on the phase noise power of the signal leakage.

[0021] In the implementation, the frequency interval F between the center frequency of the first signal and the center frequency of the downlink carrier signal and the modulation data rate S used to transmit the first signal satisfy the following: the absolute value of FS is greater than or equal to the first frequency interval.

[0022] In the realization method, F is F=1 / T / R bit and S is S=1 / T / R bit / M, where T is the level duration of one symbol of the first signal, and R bit is the number of bit repetitions used for the first signal, and M is the number of Manchester encoding repetitions used for the first signal.

[0023] In an implementation, the method further includes: a network device receives a data signal, the bandwidth of the data signal being larger than the bandwidth of a first signal, the center frequency of the data signal being the same as the center frequency of the first signal bandwidth or the center frequency of the data signal bandwidth being different from the center frequency of the first signal bandwidth, a distance between a first frequency within the bandwidth of the first signal and the center frequency of the carrier bandwidth being larger than a distance between a second frequency within the bandwidth of the data signal and the center frequency of the carrier bandwidth, and the second frequency being a frequency having a smallest frequency spacing from the center frequency of the carrier bandwidth within the bandwidth of the data signal.

[0024] In an implementation, the first signal corresponds to a first number of bit repetitions and a first number of Manchester coding repetitions, and the data signal corresponds to a second number of bit repetitions and a second number of Manchester coding repetitions, where the first number of bit repetitions is different from the second number of bit repetitions and / or the first number of Manchester coding repetitions is different from the second number of Manchester coding repetitions.

[0025] For the technical effects brought about by the second aspect and possible implementation manners of the second aspect, reference is made to the description of the technical effects of the first aspect and possible implementation manners of the first aspect.

[0026] According to a third aspect, an embodiment of the present application provides a communication device. The communication device has a function for implementing the behavior of the method embodiment of the first aspect. For beneficial effects, please refer to the description of the first aspect. Details will not be described again herein. The communication device may be the label in the first aspect, or the communication device may be a device, such as a chip or a chip system, that can implement the method provided in the first aspect.

[0027] In a possible design, the communication device includes corresponding means or modules configured to perform the method of the first aspect. For example, the communication device includes a processing unit (or sometimes referred to as a processing module or processor) and / or a transceiver unit (or sometimes referred to as a transceiver module or transceiver). Such units (modules) may perform corresponding functions of the example method of the first aspect.

[0028] For example, the transceiver module is configured to receive a carrier signal. The processing module is configured to determine a frequency band of the first signal. The transceiver module is further configured to transmit a positioning reference signal within the frequency band of the first signal. The spacing between a first frequency within the frequency band of the first signal and a center frequency of the carrier bandwidth is equal to or greater than the first frequency spacing. The first frequency is a frequency within the frequency band of the first signal that has the smallest frequency spacing from the center frequency of the carrier bandwidth. For details, please refer to the detailed description in the example method. The details will not be described again herein.

[0029] According to a fourth aspect, an embodiment of the present application provides a communication device. The communication device has a function for implementing the behavior of the method embodiment of the second aspect. For beneficial effects, please refer to the description of the second aspect. Details will not be described again herein. The communication device may be a network device in the second aspect, or may be a device, such as a chip or a chip system, that can implement the method provided in the second aspect.

[0030] In a possible design, the communication device includes corresponding means or modules configured to perform the method of the second aspect. For example, the communication device includes a processing unit (or sometimes referred to as a processing module or processor) and / or a transceiver unit (or sometimes referred to as a transceiver module or transceiver). Such units (modules) may perform corresponding functions of the example methods of the second aspect.

[0031] For example, the transceiver module is configured to transmit a carrier signal and receive a positioning reference signal within a frequency band of the first signal. The processing module is configured to determine the frequency band of the first signal. The spacing between a first frequency within the frequency band of the first signal and a center frequency of the carrier bandwidth is equal to or greater than the first frequency spacing. The first frequency is a frequency within the frequency band of the first signal that has the smallest frequency spacing from the center frequency of the carrier bandwidth. For details, please refer to the detailed description in the example method. Details will not be described again herein.

[0032] According to a fifth aspect, an embodiment of the present application provides a communication device. The communication device may be the communication device according to any one of the first or second aspects of the above embodiments, or a chip or chip system disposed in the communication device according to any one of the first or second aspects. The communication device includes a communication interface and a processor, and optionally further includes a memory. The memory is configured to store a computer program. The processor is coupled to the memory and the communication interface. When the processor reads the computer program or instructions, the communication device is caused to perform the method performed by the label or network device in the above method embodiments.

[0033] The communication interface in the communication device in the fifth aspect may be a transceiver of the communication device, for example, realized by using an antenna, a feeder, and a codec in the communication device. Alternatively, if the communication device is a chip disposed in the communication device, the communication interface may be an input / output interface of the chip, for example, an input / output pin.

[0034] According to a sixth aspect, an embodiment of the present application provides a communication device. The communication device includes an input / output interface and a logic circuit. The input / output interface is configured to input and / or output information. The logic circuit is configured to perform the method of either the first or second aspect.

[0035] According to a seventh aspect, an embodiment of the present application provides a chip system. The chip system includes a processor, and may further include a memory and / or a communication interface, and is configured to implement the method in any one of the first and second aspects. In a possible implementation, the chip system further includes a memory configured to store a computer program. The chip system may include a chip, or may include a chip and other discrete components.

[0036] According to an eighth aspect, an embodiment of the present application provides a communication system, the communication system including a label and a network device, the label configured to perform the method performed by the label in the first aspect, and the network device configured to perform the method performed by the network device in the second aspect. Alternatively, the communication system may further include more labels and / or more network devices.

[0037] According to a ninth aspect, the present application provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, which, when executed, realizes the method of any one of the first and second aspects.

[0038] According to a tenth aspect, there is provided a computer program product, the computer program product comprising computer program code that, when executed, performs the method of any one of the first and second aspects.

[0039] For the beneficial effects of the third to tenth aspects and their implementation methods, please refer to the explanation of the beneficial effects of the method in the first aspect and its implementation method. [Brief explanation of the drawings]

[0040] [Figure 1] FIG. 1 is a diagram of positioning based on AOA. [Figure 2] 1 is a flowchart of a first positioning scenario according to an embodiment of the present application. [Figure 3] 1 is a flowchart of a second positioning scenario according to an embodiment of the present application. [Figure 4] 10 is a flowchart of a third positioning scenario according to an embodiment of the present application. [Figure 5] 10 is a flowchart of a fourth positioning scenario according to an embodiment of the present application. [Figure 6] 1 is a frequency band diagram of a positioning reference signal (single sideband modulation) according to an embodiment of the present application. [Figure 7] 1 is a frequency band diagram of a positioning reference signal (double sideband modulation) according to an embodiment of the present application; [Figure 8] 1 is a schematic flowchart of a communication method according to an embodiment of the present application; [Figure 9] 1 is a diagram of a data signal bandwidth and a positioning reference signal bandwidth according to an embodiment of the present application; [Figure 10] FIG. 2 is a configuration diagram of an uplink carrier and a downlink carrier according to an embodiment of this application. [Figure 11] FIG. 10 is another configuration diagram of an uplink carrier and a downlink carrier according to an embodiment of the present application. [Figure 12] 1 is a diagram of the structure of a communication device according to an embodiment of the present application; [Figure 13] FIG. 10 is a diagram of another structure of a communication device according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0041] In the architecture shown in FIG. 1, in addition to receiving signals from terminal devices, any network device may further receive signals transmitted by other network devices. For example, network device 1 may receive a signal (e.g., referred to as a first signal) from the terminal device and a carrier signal from network device 2. The carrier signal may be used for backsatter communication to provide energy for transmission from the terminal device to the network device. For network device 1, compared with the first signal of the terminal device, the carrier signal of network device 2 is an interference signal, causing extra phase noise. In this case, the signal-to-interference-plus-noise ratio of the signal received by network device 1 is low. Thus, the network device's demodulation performance or detection performance for the signal transmitted by the terminal device is reduced.

[0042] In view of this, a technical solution is proposed in the embodiments of this application. According to the solution provided in the embodiments of this application, the phase noise generated by the carrier signal within the frequency band range of the first signal transmitted by the terminal device is low, thereby improving the signal-to-interference-and-noise ratio of the signal received by the receiving end and facilitating the demodulation or detection of the first signal.

[0043] The technical solutions provided in the embodiments of this application may be applied to various communication systems, for example, next-generation communication systems such as long-term evolution (LTE) systems, 5th generation mobile communication technology (5G) systems, i.e., new radio (NR) systems, or 6G systems. Obviously, the technical solutions in the embodiments of this application may also be applied to other communication systems, provided that the communication systems have positioning requirements for terminals. For example, the technical solutions provided in the embodiments of this application may also be applied to Internet of Things (IoT) systems, narrowband Internet of Things (NB-IoT) systems, etc., such as wireless fidelity (Wi-Fi)-based IoT or wearable Wi-Fi networks. The wearable Wi-Fi network may be a Wi-Fi network formed by using a terminal device (e.g., a mobile phone) and an associated wearable device as a virtual access point.

[0044] The system described in the embodiments of this application is intended to more clearly explain the technical solutions in the embodiments of this application, but does not constitute a limitation on the technical solutions provided in the embodiments of this application. For example, a signal transmitted by a terminal device (referred to as a first signal in the embodiments of this application) is a positioning reference signal. The embodiments of this application are applicable to a positioning system based on angle of arrival (AOA) shown in FIG. 1. AOA-based positioning means that at least two network devices participating in the positioning of a terminal device measure the positioning reference signal transmitted by the terminal device to obtain the AOA, and then the position of the terminal may be positioned based on the intersection of the optical rays transmitted by the network devices on the corresponding AOA. To better understand the solutions provided in the embodiments of this application, the relevant content of AOA-based positioning will be first described.

[0045] An example is taken in which at least two network devices participating in the positioning of a terminal device are network device 1 and network device 2 in FIG. 1. As shown in FIG. 1, the angle at which the positioning reference signal transmitted by the terminal device arrives at network device 1 is α1, and the angle at which the positioning reference signal transmitted by the terminal device arrives at network device 2 is α2. The optical ray transmitted at α1 using network device 1 as the starting point must pass through the terminal device, and the optical ray transmitted at α2 using network device 2 as the starting point must also pass through the terminal device. Therefore, the intersection point of the optical rays transmitted by network device 1 and network device 2 at the corresponding AOA is the position of the terminal device. According to the solution in the embodiment of this application, the phase noise generated by the carrier signal within the frequency band range of the positioning reference signal transmitted by the terminal device is low, thereby improving the signal-to-interference-and-noise ratio of the signal received by the receiving end, facilitating the demodulation of the positioning reference signal by the first network device, and improving positioning performance.

[0046] In an embodiment of this application, the positioning reference signal may be a positioning-dedicated signal. In this case, in addition to transmitting the positioning reference signal, the terminal device may further transmit a data signal. Alternatively, the data signal transmitted by the terminal device may be used for positioning of the terminal device. In this case, it is not necessary to define a positioning-dedicated signal. In one scenario, a first network device may trigger the terminal device to transmit a positioning reference signal or a data signal to perform positioning for the terminal device. In another scenario, the terminal device may transmit a positioning reference signal or a data signal to the network device when accessing the network device, and the network device may perform positioning for the terminal device based on the received data signal or the received positioning reference signal. For ease of explanation, a procedure in which a network device triggers a terminal device to transmit a positioning reference signal or a data signal to perform positioning for the terminal device is referred to as a first type of positioning procedure. Correspondingly, when a terminal device accesses a network device, it may transmit a positioning reference signal or a data signal to the network device, and the procedure in which the network device performs positioning on the terminal device based on the received data signal or the received positioning reference signal is called a second type of positioning procedure. According to whether a positioning reference signal is defined and the type of positioning procedure, the following four positioning scenarios may be included:

[0047] FIG. 2 shows a procedure in a first positioning scenario. In the first positioning scenario, a positioning reference signal is defined, and the positioning procedure is a second type of positioning procedure. As shown in FIG. 2, a terminal device accesses a network device through a random access procedure, and the network device sends an acknowledgement message to the terminal device. The terminal device receives the acknowledgement message sent by the network device and sends a positioning reference signal and a data signal to the network device. The data signal may carry related information of the terminal device, such as an identifier (ID) of the terminal device. The network device performs positioning for the terminal device based on the received positioning reference signal.

[0048] FIG. 3 illustrates a procedure in a second positioning scenario. In the second positioning scenario, a positioning reference signal is defined, and the positioning procedure is a first type of positioning procedure. As illustrated in FIG. 3, a network device triggers a terminal device to transmit a positioning reference signal. For example, the network device configures configuration information for the terminal device used to transmit the positioning reference signal. The terminal device transmits the positioning reference signal to the network device in response to the network device's trigger. The terminal device accesses the network device through a random access procedure, and the network device transmits an acknowledgement message to the terminal device. The network device performs positioning for the terminal device based on the received positioning reference signal.

[0049] FIG. 4 shows a procedure in a third positioning scenario. In the third positioning scenario, there is no positioning reference signal, and the positioning procedure is a second type of positioning procedure. As shown in FIG. 4, a terminal device accesses a network device through a random access procedure, and the network device sends an acknowledgement message to the terminal device. The terminal device receives the acknowledgement message sent by the network device and sends a data signal to the network device. The data signal may carry related information of the terminal device, such as an identifier (ID) of the terminal device. The network device performs positioning for the terminal device based on the received positioning reference signal.

[0050] FIG. 5 illustrates a procedure in a fourth positioning scenario. In the fourth positioning scenario, there is no positioning reference signal, and the positioning procedure is a first type of positioning procedure. As illustrated in FIG. 5, a network device triggers a terminal device to transmit a positioning reference signal. For example, the network device configures configuration information for the terminal device, which is used to transmit a data signal. The terminal device transmits a data signal to the network device in response to the network device's trigger. The network device performs positioning for the terminal device based on the received data signal.

[0051] In an embodiment of this application, a terminal device is a device having wireless transceiver functionality and may transmit signals to or receive signals from a network device. A terminal device may include user equipment (UE), and may sometimes be referred to as a terminal, terminal equipment, access station, UE station, remote station, wireless communication device, user equipment, etc. The terminal device is configured to connect people, things, machines, etc., and may be widely used in various scenarios, including, but not limited to, the following scenarios: cellular communication, device to device (D2D), vehicle to everything (V2X), machine-to-machine / machine-type communication (M2M / MTC), IoT, virtual reality (VR), augmented reality (AR), industrial control, self-driving, remote medical, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city, unmanned aerial vehicles, and robots.

[0052] The terminal device may alternatively be a label, a Bluetooth module, or a device equipped with a Bluetooth module. The terminal device may alternatively be a wearable device. A wearable device may also be called a wearable intelligent device, an intelligent wearable device, etc., and is a general term for wearable devices that are intelligently designed and developed for everyday wear by using wearable technology, such as glasses, gloves, watches, clothes, and shoes.

[0053] When the above various terminal devices are located in a vehicle (e.g., arranged or installed in a vehicle), all of the terminal devices may be considered as on-board terminal devices. For example, an on-board terminal device may also be called an on-board unit (OBU). The terminal devices in the embodiments of this application may alternatively be on-board modules, on-board components, on-board chips, or on-board units that are incorporated into a vehicle as one or more components or units. A vehicle may implement the methods in this application by using an integrated on-board module, on-board component, on-board chip, or on-board unit.

[0054] In the embodiments of this application, the communication device configured to realize the functions of the terminal device may be the terminal device itself, or may be a device that can support the terminal device in realizing the functions. For example, the device may be a chip system and be installed in the terminal device. For ease of explanation, in the embodiments of this application, an example in which the device configured to realize the functions of the terminal device is the terminal device is used to describe the technical solutions provided in the embodiments of this application.

[0055] In an embodiment of this application, the network device may be an access device for a terminal device to access a mobile communication system in a wireless manner, and may include, for example, an access network (AN) device, such as a base station. Alternatively, the network device may be a device that communicates with a terminal device over an air interface. The network device may include an evolved NodeB (eNB / e-NodeB) in an LTE system or a long-term evolution-advanced (LTE-A) system. Alternatively, the network device may include a next-generation NodeB (gNB) in an NR system. Alternatively, the network device may include an access node in a wireless fidelity (Wi-Fi) system. The network device may alternatively be a station, a relay station, an in-vehicle device, a future evolved Public Land Mobile Network (PLMN) device, a device in a D2D network, a device in an M2M network, a device in an internet of things (IoT) network, a network device in a PLMN network, etc. The specific technology used by the network device and the specific device type are not limited to the embodiments of this application.

[0056] Furthermore, a base station may include a centralized unit (CU) and a distributed unit (DU), and multiple DUs may be controlled by one CU in a centralized manner. The CU and the DU may be divided based on the protocol layer functions that the CU and the DU each have in a wireless network. For example, the functions of the packet data convergence protocol (PDCP) layer and the protocol layers above the packet data convergence protocol layer are configured in the CU, and the functions of the protocol layers below the PDCP layer, such as the radio link control (RLC) layer and the media access control (MAC) layer, are configured in the DU. It should be noted that such protocol layer division is merely an example, and division may alternatively be performed in other protocol layers. The radio frequency device may be deployed remotely and not located in the DU, or may be integrated into the DU, or may be partially located remotely and partially integrated into the DU. This is not a limitation of the embodiments of this application. Furthermore, in some embodiments, the control plane (CP) and user plane (UP) of a CU may be separated into different entities for implementation, namely, a control plane CU entity (CU-CP entity) and a user plane CU entity (CU-UP entity), respectively. The control plane CU-CP of a CU further includes a further split architecture. In other words, the existing CU-CP is further split into CU-CP1 and CU-CP2. CU-CP1 includes various radio resource management functions, while CU-CP2 includes only radio resource control (RRC) functions and PDCP-C functions (i.e., basic functions for control plane signaling at the PDCP layer).

[0057] In the embodiments of this application, the communication device configured to realize the functions of the network device may be a network device, or may be a device that can support the network device in realizing the functions. For example, the device is a chip system and is installed in the network device. For ease of description, in the embodiments of this application, an example in which the device configured to realize the functions of the network device is a network device is used to describe the technical solutions provided in the embodiments of this application.

[0058] In the following, some terms in the embodiments of this application will be explained and described.

[0059] (1) Carrier bandwidth may also be called system bandwidth and may be expressed by the transmission bandwidth of a carrier. A network device may configure one or more carriers. Correspondingly, the transmission bandwidth corresponding to one or more carriers configured by a network device may be understood as the system bandwidth. For example, if one network device configures one carrier and the transmission bandwidth of the carrier is 100 MHz (megahertz), the system bandwidth may be considered to be 100 MHz. In another example, if one network device configures five carriers and the transmission bandwidth of each carrier is 20 MHz, the system bandwidth may be considered to be 100 MHz.

[0060] (2) Channel Bandwidth: The channel bandwidth of a terminal device supports a single NR radio frequency carrier in the uplink or downlink of the terminal device. From the perspective of a network device, the channel bandwidths of different terminal devices may be supported in the same spectrum to transmit information to and / or receive information from terminal devices connected to the network device. Within the channel bandwidth of the network device, transmission of multiple carriers to the same terminal device (carrier) or multiple carriers to different terminal devices may be supported. From the perspective of a UE, one or more bandwidth parts (BWPs) / carriers may be configured for a terminal device, and each carrier has its own terminal device channel bandwidth. The terminal device does not need to know the channel bandwidth of the network device or how the network device allocates bandwidth to different terminal devices. The terminal device channel bandwidth of each carrier of the terminal device is flexibly configured but can only be fully configured within the channel bandwidth of the network device.

[0061] (3) The frequency band of the positioning reference signal is a segment of contiguous frequency domain resources in the frequency domain and may include multiple carriers used to transmit the positioning reference signal.

[0062] (4) A frequency band of a data signal is a segment of contiguous frequency domain resources in the frequency domain and may include multiple carriers used to transmit the data signal.

[0063] (5) Manchester coding, also known as split phase coding, synchronous coding, or phase coding, is a coding method in which level jumps are used to represent 1 or 0. Each code element in Manchester coding is represented by two level signals with different phases, i.e., one cycle of a square wave. The phases of code 0 and code 1 are opposite. The number of iterations M in Manchester coding is a parameter of Manchester coding.

[0064] For example, the input bit sequence is g0, g1, g2, g3, ... and g G-1 and after Manchester encoding, the output bit sequence is h0, h1, h2, h3, ... and h H-1 and H=2M·G, where M is the number of iterations of Manchester encoding. The pseudocode for Manchester encoding is as follows: for k=0 to G-1 if g k =0 for j=0 to M-1 h 2Mk+2j =0,h 2Mk+2j+1 =1 End for Else For j=0 to M-1 h 2Mk+2j =1,h 2Mk+2j+1 =0 End for End if End for

[0065] For example, when M=1, original bit 0 is coded as 01, and original bit 1 is coded as 10.

[0066] Another parameter of Manchester encoding is the bit repetition number R, which is a binary number with input bits 0 and 1 and may be used to determine the set of output bits. For example, original bit a(i) is mapped as R bits, resulting in b(iR), b(iR+1), ..., and b(iR+R-1). The set of output bits may be determined according to the following formula: b(iR+k)=a(i), where k=0, 1, ..., and R-1. For example, if R=2, original bit 0 is changed to 00, and original bit 1 is changed to 11.

[0067] (6) In the embodiments of this application, the terms "system" and "network" may be used interchangeably. In the embodiments of this application, "multiple" may also be understood as "at least two." "At least one" may be understood as one or more, for example, one, two, or more. For example, "including at least one" means "including one, two, or more," and there is no limitation on which is included. For example, "including at least one of A, B, and C" may mean "including A, B, or C," "including A and B, A and C, or B and C," or "including A, B, and C." The term "and / or" describes an association relationship for describing related objects and indicates that three relationships may exist. For example, A and / or B may represent the following three cases: only A exists, both A and B exist, and only B exists. Furthermore, the character " / " generally indicates an "or" relationship between related objects.

[0068] In the embodiments of this application, terms such as "an example," "in some embodiments," "in other embodiments," and the like are used to denote providing an example, illustration, or explanation. Any embodiment or design manner described in this application as an "example" should not be described as preferred or having more advantages over other embodiments or design manners. Rather, the term "example" is intended to present concepts in a particular way.

[0069] Unless otherwise specified, ordinal numbers such as "first" and "second" in the embodiments of this application are used to distinguish between multiple objects and are not intended to limit the order, chronological order, priority, or importance of the multiple objects. For example, a first bit repetition number and a second bit repetition number are simply used to distinguish between different bit repetition numbers and are not used to limit the function, priority, or importance of the two second bit repetition numbers. In the embodiments of this application, unless otherwise specified, "if" can be replaced with "if", and "if" can be replaced with "when".

[0070] The embodiments of this application are intended to enable a carrier signal to generate low phase noise within a frequency band of a first signal transmitted by a terminal device. In order to facilitate understanding of the solution provided in the embodiments of this application, an example in which the terminal device is a transmitting end is used to first describe the principle of reducing phase noise in the embodiments of this application.

[0071] A network device typically selects a frequency band and a frequency location for transmitting a signal based on the communication requirements of a terminal device. However, the phase noise corresponding to a frequency location close to the center frequency of a carrier signal transmitted by a carrier signal source is greater than the phase noise corresponding to a frequency location far from the center frequency of the carrier signal transmitted by the carrier signal source. For example, the distances between the frequencies and the center frequencies of the carrier signals are [10, 100, 1k, 10k, 100k, 1MHz, 10MHz, 40MHz] in sequence, and the corresponding phase noises generated by the frequencies are [-67, -103, -124, -138, -145, -151, -153, -157, -157] dBc / Hz in sequence. A carrier signal source refers to a device that provides a carrier signal, such as a network device.

[0072] Therefore, in an embodiment of this application, a frequency position at which a terminal device transmits a signal (e.g., referred to as a first signal) may be specified, so that the phase noise of the carrier signal is low within the frequency band of the first signal. For example, if the frequency position at which the first signal is transmitted is far away from the center frequency of the carrier signal transmitted by the carrier signal source, the phase noise of the carrier signal located in the frequency band of the first signal is reduced.

[0073] The embodiments of this application are applicable to any of the scenarios in Figures 2 to 5. Below, the technical solutions provided in the embodiments of this application will be described by using an example in which the embodiments of this application are applied to the architecture shown in Figure 1. In the formulas in the embodiments of this application, a variable ending with Linear indicates that the variable is in the linear domain, and a variable ending with dB indicates that the variable is in the logarithmic domain.

[0074] The first network device may transmit a carrier signal to the terminal device, causing the terminal device to transmit a first signal. The terminal device then receives the carrier signal from the first network device. After receiving the carrier signal, the terminal device transmits the first signal. The first network device and the second network device may then receive the first signal from the terminal device. In a possible scenario, the second network device may also transmit the carrier signal. Correspondingly, in addition to receiving the first signal from the terminal device, the first network device may also receive a carrier signal from the second network device. The carrier signal transmitted by the second network device causes additional phase noise and interferes with the first signal transmitted by the terminal device. As a result, the signal received by the first network device has a low signal-to-interference-plus-noise ratio, affecting the demodulation or detection performance of the first signal.

[0075] Therefore, in an embodiment of this application, the terminal device may transmit a first signal at a frequency location far away from the center frequency of the carrier signal. Correspondingly, the phase noise generated by the carrier signal within the frequency location range is also low, thereby improving the signal-to-interference-plus-noise ratio of the signal received by the first network device. For example, the terminal device transmits a first signal within the frequency band of the first signal, and the phase noise of the carrier signal within the frequency band of the first signal is less than a first threshold.

[0076] The first threshold is a power threshold of phase noise and may be determined by the first network device. The value of the first threshold is related to positioning accuracy, and different positioning accuracy may correspond to different SINRs and different signal powers. Therefore, the first threshold may be determined based on an SINR range and a signal power range corresponding to a target positioning accuracy.

[0077] For example, the SINR satisfies equation (1). SINR=10×log10(SigPowerLinear / (noiseLinear+PNLinear)) (1)

[0078] In equation (1), SigPowerLinear is the signal power, noiseLinear is the noise power, and PNLinear is the phase noise power. SigPowerLinear may usually be obtained through calculation by using the link budget. For example, if the transmit power of a signal is P1 and the path loss of the link is PL, then the received power of the signal, SigPowerdB, is P1-PL. It can be understood that a linear and logarithmic transformation is performed between sigPowerLinear and SigPowerdB, i.e., SigPowerdB=10*log10(sigPowerLinear).

[0079] The noise power NoisedB satisfies equation (2). NoisedB=-174+10log10(BW)+NF (2)

[0080] In equation (2), BW is the single-sideband bandwidth of the signal, and NF is the noise factor.

[0081] An example is used in which the minimum SINR corresponding to the target positioning accuracy is SINRmin. In this case, the minimum value of SINR obtained through calculation by substituting SigPowerdB, NoisedB, and phase noise power PN into Equation (1) may be equal to SINRmin. From Equation (1), it can be seen that a larger PN indicates a smaller SINR. For example, PN is also larger than PNThr, and the minimum value of SINR may be SINRmin, where PNThr is the first threshold.

[0082] An embodiment of this application aims to reduce the phase noise of a carrier signal within a frequency band of a first signal. For example, the phase noise of the carrier signal within the frequency band of the first signal is less than a first threshold. For the phase noise of the carrier signal within the frequency band of the first signal to be less than the first threshold, the distance between the frequency closest to the center frequency of the carrier bandwidth and the center frequency of the carrier bandwidth must be equal to or greater than a first frequency distance BWpart. For ease of explanation, the frequency within the frequency band of the first signal that has the smallest frequency distance from the center frequency of the carrier bandwidth is referred to as the first frequency. As shown in FIG. 6, the first signal is obtained based on single-sideband modulation, and [FS, F+S] in FIG. 6 is the frequency band of the first signal. The distance between the first frequency FS within the frequency band of the single-sideband signal and the center frequency of the carrier bandwidth is not less than BWpart. Specifically, the distance between the single-sideband signal close to the center frequency of the carrier bandwidth and the carrier center is not less than BWpart. As shown in Figure 7, the first signal is obtained based on double sideband modulation, and [-(F+S),-(FS)] and [FS,F+S] in Figure 7 are the frequency bands of the first signal. The distance between the frequency position of each sideband (e.g., FS and -(FS)) of the double sideband signal close to the center frequency of the carrier bandwidth and the carrier center is not less than BWpart. "0" in Figures 6 and 7 is the center frequency of the carrier bandwidth.

[0083] When the integral of the phase noise power PNIOTdB of signal leakage is less than the first threshold value (i.e., PNThr), the phase noise of the signal is less than the first threshold value. PNIOTdB satisfies Equation (3). PNIOTdB = 10 log10((PNPowerLinear + NoiseLinear) / NoiseLinear) (3)

[0084] PNPowerLinear satisfies Equation (4). PNPowerLinear = ∫ BWpart BWpart+BW PN(f) df (4)

[0085] In Equation (4), BW is the bandwidth of the first signal, PN(f) is the phase noise roll-off function y, i.e., y = PN(f), f is the frequency offset with respect to the center frequency of the carrier bandwidth, and y is the relative value of the phase noise power with respect to the carrier bandwidth.

[0086] PNPowerLinear needs to make PNIOTdB less than PNThrdB. According to Equation (4), it can be seen that PNPowerLinear determined based on BWpart needs to make PNIOTdB less than PNThrdB.

[0087] At a position far from the center frequency of the carrier bandwidth, the roll-off of the phase noise power is slow. Therefore, Equation (4) may be approximated as PNPowerLinear ≒ PN(BWpart) × BW. According to Equations (2) and (4), PNIOTdB ≒ 10 log10((PNPowerLinear) / NoiseLinear) = 10 log10(PN(BWpart)) + 174 - NF - 10 log10(BW) is obtained.

[0088] When PNIOTdB < PNThrdB is required, BWpart needs to satisfy Equation (5). 10 log10(PN(BWpart)) + 174 - NF - 10 log10(BW) < PNThrdB (5)

[0089] It should be noted that the frequency range corresponding to the power of PN(BWpart) needs to be converted to 1 Hz to ensure that the frequency range corresponding to the calculated power is matched.

[0090] The interval between the first frequency in the frequency band of the first signal and the center frequency of the carrier bandwidth is equal to or greater than the first frequency interval, which means that the first signal bandwidth is equal to or less than the absolute value of the difference between half the carrier bandwidth and the first frequency interval. For example, the carrier bandwidth is BW=180 kHz, half the carrier bandwidth is 90 kHz, and the first signal bandwidth is equal to or less than 90 kHz-BWpart. For example, BWpart is not less than 10 kHz.

[0091] In one implementation, a first network device may configure a frequency band of a first signal for a terminal device, where the interval between a first frequency in the frequency band of the first signal and a center frequency of a carrier bandwidth is equal to or greater than a first frequency interval BWpart. The terminal device transmits the first signal on the frequency band of a positioning reference signal. Because the phase noise of the carrier signal in the first signal is less than a first threshold, the signal received by the first network device has a high signal-to-interference and noise ratio, which facilitates demodulation or detection of the first signal. For example, the first signal is a positioning reference signal, and the signal received by the first network device has a high signal-to-interference and noise ratio, thereby improving positioning performance.

[0092] In another implementation, when transmitting the first signal, the terminal device may adjust the frequency band and frequency offset of the positioning reference signal by introducing a line code. Based on this, the first network device may configure the line code used to transmit the first signal for the terminal device, so that the interval between the first frequency in the frequency band of the first signal and the center frequency of the carrier bandwidth is equal to or greater than the first frequency interval. For example, the first network device may configure the number of bit repetitions R used to transmit the first signal for the terminal device. bit and the number of Manchester encoding iterations M, i.e., (R bit , M). The frequency spacing F between the center frequency of the first signal and the center frequency of the downlink carrier signal may be 1 / T / R bit where T is the level duration of one symbol of the first signal. One symbol of the first signal corresponds to one bit (e.g., 0 or 1) before line code encoding. The bit before encoding is also called the original bit. The original bit 0 corresponds to a low level. Relatively, the original bit 1 corresponds to a high level. The low level and the high level have the same length, and one symbol corresponds to one original bit. T is the duration length of the level corresponding to the original bit symbol. The duration of the original bit symbol may also be the sum of the duration of the high level corresponding to the original bit and the duration of the low level corresponding to the original bit. Alternatively, the duration of the original bit symbol may also be half or a part of the duration of the high level corresponding to the original bit or the low level corresponding to the original bit.

[0093] The modulation data rate S used to transmit the first signal is 1 / T / R bit When the absolute value of FS is equal to or greater than BWpart, the interval between the first frequency in the frequency band of the first signal and the center frequency of the carrier bandwidth is equal to or greater than BWpart.

[0094] The absolute value of FS is greater than or equal to BWpart, i.e., (R bit ,M) satisfies equation (6). 1 / T / R bit -1 / T / R bit / M≧BWpart (6)

[0095] The first network device calculates the appropriate (R bit , M) may be configured.

[0096] For example, Table 1 shows the possible correspondence between T and modulation rate S. From Table 1, when T=6.25 μs, R bit It can be seen that M is 4. When BWpart=10 kHz is required, the offset F between the center frequency of the first signal and the center frequency of the downlink carrier signal is 40 kHz. In this case, M is 2 or more. [Table 1]

[0097] The first network device selects a frequency band and / or (R bit , M) so that the terminal device transmits the first signal at a specific frequency location to reduce the phase noise of the carrier signal from the second network device and improve the signal-to-interference-and-noise ratio of the signal received by the first network device. For example, the spacing between the first frequency in the frequency band of the first signal and the center frequency of the carrier bandwidth is equal to or greater than the first frequency spacing BWpart. For example, 1 / T / R bit -1 / T / R bit / M≧BWpart.

[0098] For example, FIG. 8 is a schematic flowchart of a communication method according to an embodiment of this application.

[0099] S801: A first network device transmits a carrier signal, and correspondingly, a terminal device receives the carrier signal.

[0100] The first network device may transmit a carrier signal to the terminal device, causing the terminal device to transmit a first signal.

[0101] S802: The terminal device transmits a first signal, and correspondingly, the first network device receives the first signal.

[0102] The terminal device may transmit a first signal based on the carrier signal. Before the terminal device transmits the first signal, the first network device may further configure, for the terminal device, parameters used in transmitting the first signal. For example, the first network device may transmit configuration information to the terminal device, and in response, the terminal device may receive configuration information from the first network device, the configuration information including the frequency band and / or (R bit ,M).

[0103] The first signal may be a signal dedicated to positioning (i.e., a positioning reference signal). When the terminal device needs to be positioned, in addition to configuring the parameters used for transmitting the first signal for the terminal device, the first network device may also configure the parameters used for transmitting a data signal for the terminal device, such as the bandwidth of the data signal and / or the time (R) used for transmitting the data signal. bit , M). In other words, the first network device may configure two sets of parameters. One set of parameters (e.g., the first set of parameters) is used by the terminal device to transmit a positioning reference signal, and the other set of parameters (e.g., the second set of parameters) is used by the terminal device to transmit a data signal. The first set of parameters may include a positioning reference signal bandwidth, or may include a (R bit , M). Similar to the first set of parameters, the second set of parameters may include the bandwidth of the data signal, or alternatively, (R bit , M). For ease of distinction, R in the first set of parametersbit is the first R bit where M in the first set of parameters is the first M and R in the second set of parameters bit is the second R bit where M in the first set of parameters is M in the second.

[0104] The first signal may be a data signal, and the first network device may provide a second set of parameters for the terminal device, such as a frequency band and / or (R bit , M), the spacing between the first frequency in the frequency band of the first signal and the center frequency of the carrier bandwidth is equal to or greater than the first frequency spacing. bit -1 / T / R bit / M is equal to or greater than the first frequency interval. It should be noted that if a positioning reference signal is not defined, when the terminal device needs to be positioned, the first signal transmitted by the terminal device may also be used for positioning the terminal device. In other words, during positioning, the first signal is used as a positioning reference signal.

[0105] When the first signal is a positioning reference signal dedicated to positioning, the first network device configures a first set of parameters and a second set of parameters. An example is used in which the first set of parameters includes a positioning reference signal bandwidth, and the second set of parameters includes a data signal bandwidth. In other words, the first network device configures a positioning reference signal bandwidth and a data signal bandwidth for the terminal device. In this case, the center frequency of the data signal bandwidth may be the same as or different from the center frequency of the positioning reference signal bandwidth.

[0106] For example, when the center frequency of the bandwidth of the data signal may be the same as the center frequency of the positioning reference signal bandwidth, the bandwidth of the data signal is larger than the positioning reference signal bandwidth. Optionally, it may be agreed that the center frequency of the bandwidth of the data signal may be the same as the center frequency of the positioning reference signal bandwidth. In this case, the first network device only needs to configure the bandwidth of the data signal and the positioning reference signal bandwidth.

[0107] For example, FIG. 9 illustrates the bandwidth of a data signal and the bandwidth of a positioning reference signal. In FIG. 9, an example is used in which the center frequency of the carrier obtained after frequency shifting is ±40 kHz. When the positioning reference signal bandwidth is 40 kHz, the frequency ranges of the positioning reference signal are -50 kHz to -30 kHz and 30 kHz to 50 kHz. When the data signal bandwidth is 160 kHz, the frequency range of the data signal is -80 kHz to 80 kHz. The shaded areas in FIG. 9 indicate the frequency band ranges for transmitting the data signal and the positioning reference signal. It can be seen from FIG. 9 that when the center frequency of the data signal bandwidth is the same as the center frequency of the positioning reference signal bandwidth, the bandwidth of the data signal may be larger than the positioning reference signal bandwidth. In this way, the data signal may be transmitted at a higher rate, improving data transmission efficiency. Furthermore, since the positioning reference signal bandwidth is narrow and the first frequency in the frequency band of the positioning reference signal is far from the center frequency of the carrier bandwidth, the positioning reference signal is less affected by the phase noise of the carrier signal, thereby improving the positioning effect.

[0108] For example, when the center frequency of the data signal bandwidth may be different from the center frequency of the positioning reference signal bandwidth, the distance between the first frequency within the positioning reference signal bandwidth and the center frequency of the carrier bandwidth is greater than the distance between the second frequency within the data signal bandwidth and the center frequency of the carrier bandwidth. The second frequency is the frequency that has the smallest frequency spacing from the center frequency of the carrier bandwidth within the data signal frequency band. For example, it may be agreed that the center frequency of the data signal bandwidth may be different from the center frequency of the positioning reference signal bandwidth. In this case, the first network device only needs to configure the distance between the first frequency within the positioning reference signal bandwidth and the center frequency of the carrier bandwidth and the distance between the second frequency within the data signal bandwidth and the center frequency of the carrier bandwidth.

[0109] For example, FIG. 10 is another diagram of the bandwidth of a data signal and the bandwidth of a positioning reference signal. FIG. 10 uses an example in which the center frequency of the data signal bandwidth is ±40 kHz and the center frequency of the positioning reference signal bandwidth is ±10 kHz. When the positioning reference signal bandwidth is 40 kHz, the frequency range of the positioning reference signal is −120 kHz to −40 kHz and 40 kHz to 120 kHz. When the data signal bandwidth is 160 kHz, the frequency range of the data signal is −80 kHz to 80 kHz. The shaded areas in FIG. 10 indicate the frequency band ranges for transmitting the data signal and the positioning reference signal. It can be seen from FIG. 10 that the distance between the first frequency in the positioning reference signal bandwidth and the center frequency of the carrier bandwidth is greater than the distance between the second frequency in the data signal bandwidth and the center frequency of the carrier bandwidth, thereby reducing the influence of phase noise of the carrier signal on the positioning reference signal.

[0110] The first set of parameters is the first R bit and a first M, and a second set of parameters is a second R bit In other words, the first network device allocates a first R to be used for transmitting a positioning reference signal for the terminal device. bitand a first M, and the first network device configures a second R to be used for transmitting data signals for the terminal device. bit and the second M. The first R bit and the second R bit may be different, and the first M and the second M may also be different. For example, the first R bit is 4, the first M is 4, the second R bit is 4 and the first M is 1.

[0111] Optionally, the first set of parameters may further include other possible parameters used for transmitting positioning reference signals, and the second set of parameters may further include other possible parameters used for transmitting data signals. The first network device may configure the first set of parameters and the second set of parameters separately. Alternatively, the first set of parameters may be a subset of the second set of parameters. In this case, the first network device configures the second set of parameters, thereby enabling signaling overhead to be reduced. Alternatively, the first set of parameters and the second set of parameters may be the same parameters, e.g., R bit In this case, the first network device may configure the same parameters to reduce signaling overhead.

[0112] The terminal device receives the carrier signal and selects the frequency band and / or (R bit , M), and transmits a first signal based on 1 / T / R. Since the interval between the frequency that is within the frequency band of the first signal and that is closest to the center frequency of the carrier bandwidth and the center frequency of the carrier bandwidth is equal to or greater than the first frequency interval, the phase noise of the carrier signal within the frequency band of the first signal is reduced, reducing the effect of the phase noise of the carrier signal on the first signal and making it easier to demodulate or detect the first signal. Similarly, 1 / T / R bit -1 / T / R bit / M is also equal to or greater than the first frequency interval, so that the phase noise of the carrier signal within the frequency band of the first signal is also reduced, reducing the effect of the phase noise of the carrier signal on the first signal and making it easier to demodulate or detect the first signal. For example, the first signal is a positioning reference signal, so that the positioning performance can be improved.

[0113] As described above, the embodiments of this application provide two solutions to reduce the influence of phase noise of a carrier signal on a first signal. In the first solution, the first network device configures a frequency band of the first signal for the terminal device, and the interval between the frequency that is within the frequency band of the first signal and closest to the center frequency of the carrier bandwidth and the center frequency of the carrier bandwidth is equal to or greater than the first frequency interval. In the second solution, the first network device configures a frequency band of the first signal for the terminal device (R bit ,M) and 1 / T / R bit -1 / T / R bit / M is equal to or greater than the first frequency interval.

[0114] In an alternative solution, the first network device may configure the carrier on which the terminal device transmits signals to be different from the carrier on which the first network device transmits signals to the terminal device. For ease of explanation, the carrier on which the terminal device transmits signals is referred to as the uplink carrier, and the carrier on which the first network device transmits signals is referred to as the downlink carrier. The first network device may configure the center frequency of the uplink carrier and the center frequency of the downlink carrier, or the first network device may configure the center frequency of the uplink carrier and the offset between the center frequency of the uplink carrier and the center frequency of the downlink carrier, or the first network device may configure the center frequency of the downlink carrier and the offset between the center frequency of the downlink carrier and the center frequency of the uplink carrier.

[0115] When the uplink carrier is different from the downlink carrier, the terminal device transmits the positioning reference signal on the uplink carrier, i.e., the terminal device transmits the positioning reference signal on a carrier other than the downlink carrier. For example, Figure 11 is a diagram of the uplink carrier and the downlink carrier. The terminal device transmits the positioning reference signal on the uplink carrier, and the frequency position of the positioning reference signal is far away from the center frequency of the carrier bandwidth, so that the influence of the phase noise of the carrier signal on the positioning reference signal can be reduced.

[0116] In the embodiments provided in this application, the methods provided in the embodiments of this application are described separately from the perspective of interaction between a terminal device and a network device. To realize the functions in the methods provided in the above embodiments of this application, the terminal device and the network device may include a hardware structure and / or a software module, and the above functions are realized in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether the functions in the above functions are performed by using a hardware structure, a software module, or a combination of a hardware structure and a software module depends on the specific application and design constraints of the technical solution.

[0117] The embodiment of the present application further provides a communication device. Hereinafter, a communication device for implementing the above method in the embodiment of the present application will be described with reference to the accompanying drawings.

[0118] 12 is a block diagram of a communication device 1200 according to an embodiment of the present application. The communication device 1200 may include a processing module 1210 and a transceiver module 1220. Optionally, a storage unit may be further included. The storage unit may be configured to store instructions (codes or programs) and / or data. The processing module 1210 and the transceiver module 1220 may be coupled to the storage unit. For example, the processing module 1210 may read the instructions (codes or programs) and / or data in the storage unit to implement a corresponding method. The above modules may be independently located, or may be partially or fully integrated.

[0119] In some possible implementations, the communication device 1200 can correspondingly implement the behavior and functions of the terminal device in the above-described method embodiments. The communication device 1200 may be a terminal device, a component (e.g., a chip or circuit) used in the terminal device, or a chip or chipset within the terminal device, or part of a chip configured to perform the functions of the associated method. For example, the transceiver module 1220 may perform steps such as S801 and S802 in FIG. 8 and / or be configured to support other processes of the techniques described in this specification. The processing module 1210 is configured to perform all operations performed by the terminal device in the embodiment in FIG. 8, except for transmitting and receiving operations.

[0120] For example, the transceiver module 1220 is configured to receive a carrier signal. The processing module 1210 is configured to determine a frequency band of the first signal, where a spacing between a first frequency within the frequency band of the first signal and a center frequency of the carrier bandwidth is equal to or greater than the first frequency spacing, and the first frequency is a frequency within the frequency band of the first signal that has a smallest frequency spacing from the center frequency of the carrier bandwidth. The transceiver module 1220 is further configured to transmit the first signal.

[0121] In an optional implementation, the transceiver module 1220 is further configured to transmit a data signal, wherein the bandwidth of the data signal is greater than the bandwidth of the first signal and the center frequency of the bandwidth of the data signal is the same as the center frequency of the bandwidth of the first signal.

[0122] In an optional implementation, the transceiver module 1220 is further configured to transmit a data signal, wherein a center frequency of a bandwidth of the data signal is different from a center frequency of a bandwidth of the first signal, a distance between a first frequency within the bandwidth of the first signal and the center frequency of the carrier bandwidth is greater than a distance between a second frequency within the bandwidth of the data signal and the center frequency of the carrier bandwidth, and the second frequency is a frequency having a smallest frequency spacing from the center frequency of the carrier bandwidth within the data signal bandwidth.

[0123] In an optional implementation, the first signal is transmitted using a first number of bit repetitions and a first number of Manchester coding repetitions, and the data signal is transmitted using a second number of bit repetitions and a second number of Manchester coding repetitions, wherein the first number of bit repetitions is different from the second number of bit repetitions and / or the first number of Manchester coding repetitions is different from the second number of Manchester coding repetitions.

[0124] For details about the relevant functions and related behaviors of the processing module 1210 and the transceiver module 1220, please refer to the relevant contents in any one of the above embodiments, and the details will not be described again in this specification.

[0125] In some possible implementations, the communication device 1200 can correspondingly implement the behavior and functionality of the network device in the above-described method embodiments. The communication device 1200 may be a network device, a component (e.g., a chip or circuit) used in the network device, or a chip or chipset within the network device, or part of a chip configured to perform the functionality of the associated method. For example, the transceiver module 1220 may perform steps such as S801 and S802 in FIG. 8 and / or be configured to support other processes of the techniques described herein. The processing module 1210 is configured to perform all operations performed by the first network device in the embodiment shown in FIG. 8, except for transmitting and receiving operations.

[0126] For example, the transceiver module 1220 is configured to transmit a carrier signal and receive a first signal from a terminal device, where the spacing between a first frequency within a frequency band of the first signal and a center frequency of the carrier bandwidth is equal to or greater than the first frequency spacing, and the first frequency is within the frequency band of the first signal and is closest to the center frequency of the carrier bandwidth.

[0127] In an optional implementation, the transceiver module 1220 is further configured to receive a data signal, where the bandwidth of the data signal is greater than the bandwidth of the first signal and the center frequency of the bandwidth of the data signal is the same as the center frequency of the bandwidth of the first signal.

[0128] In an optional implementation, the transceiver module 1220 is further configured to receive a data signal, wherein the center frequency of the bandwidth of the data signal is different from the center frequency of the bandwidth of the first signal, the distance between a first frequency within the bandwidth of the first signal and the center frequency of the carrier bandwidth is greater than the distance between a second frequency within the bandwidth of the data signal and the center frequency of the carrier bandwidth, and the second frequency is a frequency having a smallest frequency spacing from the center frequency of the carrier bandwidth within the data signal frequency band.

[0129] In an optional implementation, the first signal corresponds to a first number of bit repetitions and a first number of Manchester coding repetitions, and the data signal corresponds to a second number of bit repetitions and a second number of Manchester coding repetitions, the first number of bit repetitions being different from the second number of bit repetitions and / or the first number of Manchester coding repetitions being different from the second number of Manchester coding repetitions.

[0130] For details about the relevant functions and related behaviors of the processing module 1210 and the transceiver module 1220, please refer to the relevant contents in any one of the above embodiments, and the details will not be described again in this specification.

[0131] It should be understood that in the embodiments of this application, the processing module 1210 may be implemented as a processor or a processor-related circuit component, and the transceiver module 1220 may be implemented as a transceiver or a transceiver-related circuit component or a communication interface.

[0132] FIG. 13 is a block diagram of a communication device 1300 according to an embodiment of this application. The communication device 1300 may be a terminal device and may implement the functions of the terminal device in the methods provided in the embodiments of this application. Alternatively, the communication device 1300 may be a device capable of supporting the terminal device in implementing corresponding functions in the methods provided in the embodiments of this application. The communication device 1300 may be a chip system. In the embodiments of this application, the chip system may include a chip, or may include a chip and other discrete components. For specific functions, please refer to the description of the method embodiments above. Alternatively, the communication device 1300 may be a network device and may implement the functions of the network device in the methods provided in the embodiments of this application. Alternatively, the communication device 1300 may be a device capable of supporting the network device in implementing corresponding functions in the methods provided in the embodiments of this application. The communication device 1300 may be a chip system. In the embodiments of this application, the chip system may include a chip, or may include a chip and other discrete components. For specific functions, please refer to the description of the method embodiments above.

[0133] The communication device 1300 includes one or more processors 1301 that may be configured to implement or support the communication device 1300 in implementing the functions of a terminal device in the method provided in the embodiments of this application. For details, please refer to the detailed description in the example of the method. The details will not be described again herein. Alternatively, the one or more processors 1301 may be configured to implement or support the communication device 1300 in implementing the functions of a network device in the method provided in the embodiments of this application. For details, please refer to the detailed description in the example of the method. The details will not be described again herein. The processor 1301 may also be referred to as a processing unit or a processing module and may implement a specific control function. The processor 1301 may be a general-purpose processor, a special-purpose processor, etc. For example, the processor 1301 may include a central processing unit, an application processor, a modem processor, a graphics processor, an image signal processor, a digital signal processor, a video codec processor, a controller, a memory, a neural network processor, etc. The central processing unit may be configured to control the communication device 1300, execute software programs, and / or process data. The different processors may be separate components or may be integrated into one or more processors, for example integrated into one or more application specific integrated circuits.

[0134] Optionally, the communication device 1300 includes one or more memories 1302 configured to store instructions 1304. The instructions may be executed on the processor 1301 to cause the communication device 1300 to perform the methods described in the above method embodiments. The memory 1302 and the processor 1301 may be located separately or integrated together, or the memory 1302 may be considered to be coupled to the processor 1301. The coupling in this embodiment of the application may be an indirect coupling or communication connection between devices, units, or modules in an electrical, mechanical, or other form, used for information exchange between the devices, units, or modules. The processor 1301 may operate in cooperation with the memory 1302. At least one of the at least one memory may be included in the processor. It should be noted that the memory 1302 is not required and is therefore depicted by using dashed lines in FIG. 12 .

[0135] Optionally, the memory 1302 may further store data. The processor and the memory may be located separately or integrated together. In this embodiment of the application, the memory 1302 may be a non-volatile memory such as a hard disk drive (HDD) or a solid-state drive (SSD), or a volatile memory such as a random-access memory (RAM). The memory is, but is not limited to, any other medium capable of carrying or storing program code expected in the form of instructions or data structures and accessible by a computer. The memory in the embodiment of the application may alternatively be a circuit or any other device capable of implementing a storage function and configured to store program instructions and / or data.

[0136] Optionally, the communication device 1300 may include instructions 1303 (which may also be referred to as code or a program in some cases). The instructions 1303 may be executed on a processor to cause the communication device 1300 to perform the methods described in the above embodiments. The processor 1301 may store data.

[0137] Optionally, the communications device 1300 may further include a transceiver 1305 and an antenna 1306. The transceiver 1305 may also be referred to as a transceiver unit, a transceiver module, a transceiver machine, a transceiver circuit, a transceiver, an input / output interface, etc., and is configured to implement transceiver functionality of the communications device 1300 through the antenna 1306.

[0138] The processor 1301 and transceiver 1305 described in this application may be implemented in an integrated circuit (IC), an analog IC, a radio frequency identification (RFID) integrated circuit, a mixed signal IC, an ASIC, a printed circuit board (PCB), an electronic device, etc. The communication apparatus described in this specification may be implemented by an independent device (e.g., an independent integrated circuit or a mobile phone), or may be part of a larger device (e.g., a module that may be incorporated into another device). For details, refer to the above description of the terminal device and the network device. The details will not be described again here.

[0139] In a possible implementation, the communication device 1300 can correspondingly implement the behavior and functions of the terminal device in the above method embodiments. The communication device 1300 may be a terminal device, or a component (e.g., a chip or circuit) used in a terminal device, or a chip or chipset in a terminal device, or part of a chip configured to perform the functions of the associated method.

[0140] For example, the transceiver 1305 is configured to receive a carrier signal. The processor 1301 is configured to determine a frequency band of the first signal, where a spacing between a first frequency in the frequency band of the first signal and a center frequency of the carrier bandwidth is equal to or greater than the first frequency spacing, and the first frequency is a frequency that has a smallest frequency spacing from the center frequency of the carrier bandwidth in the frequency band of the first signal. The transceiver 1305 is further configured to transmit the first signal.

[0141] In an optional implementation, the transceiver 1305 is further configured to transmit a data signal, wherein the bandwidth of the data signal is greater than the bandwidth of the first signal, and the center frequency of the bandwidth of the data signal is the same as the center frequency of the bandwidth of the first signal.

[0142] In an optional implementation, the transceiver 1305 is further configured to transmit a data signal, wherein the center frequency of the bandwidth of the data signal is different from the center frequency of the bandwidth of the first signal, the distance between a first frequency within the bandwidth of the first signal and the center frequency of the carrier bandwidth is greater than the distance between a second frequency within the bandwidth of the data signal and the center frequency of the carrier bandwidth, and the second frequency is a frequency having a smallest frequency spacing from the center frequency of the carrier bandwidth within the data signal bandwidth.

[0143] In an optional implementation, a first number of bit repetitions and a first number of Manchester coding repetitions are used for the first signal, and a second number of bit repetitions and a second number of Manchester coding repetitions are used for the data signal, the first number of bit repetitions being different from the second number of bit repetitions and / or the first number of Manchester coding repetitions being different from the second number of Manchester coding repetitions.

[0144] For details, please refer to the relevant contents in any of the above embodiments, and the details will not be described again in this specification.

[0145] In some possible implementations, the communication device 1300 can correspondingly implement the behavior and functionality of the network device in the above method embodiments. The communication device 1300 may be a network device, or a component (e.g., a chip or circuit) used in a network device, or may be part of a chip or chipset within a network device or a chip configured to perform the functionality of the associated method.

[0146] For example, the transceiver 1305 is configured to transmit a carrier signal and receive a first signal from a terminal device, where the spacing between a first frequency in the frequency band of the first signal and a center frequency of the carrier bandwidth is equal to or greater than the first frequency spacing, and the first frequency is a frequency that has a minimum frequency spacing from the center frequency of the carrier bandwidth in the frequency band of the first signal.

[0147] In an optional implementation, the transceiver module 1305 is further configured to receive a data signal, where the bandwidth of the data signal is greater than the bandwidth of the first signal and the center frequency of the bandwidth of the data signal is the same as the center frequency of the bandwidth of the first signal.

[0148] In an optional implementation, the transceiver module 1305 is further configured to receive a data signal, wherein the center frequency of the bandwidth of the data signal is different from the center frequency of the bandwidth of the first signal, the distance between a first frequency within the bandwidth of the first signal and the center frequency of the carrier bandwidth is greater than the distance between a second frequency within the bandwidth of the data signal and the center frequency of the carrier bandwidth, and the second frequency is a frequency having a smallest frequency spacing from the center frequency of the carrier bandwidth within the data signal frequency band.

[0149] In an optional implementation, the first signal corresponds to a first number of bit repetitions and a first number of Manchester coding repetitions, and the data signal corresponds to a second number of bit repetitions and a second number of Manchester coding repetitions, the first number of bit repetitions being different from the second number of bit repetitions and / or the first number of Manchester coding repetitions being different from the second number of Manchester coding repetitions.

[0150] For details, please refer to the relevant contents in any of the above embodiments, and the details will not be described again in this specification.

[0151] Optionally, communication device 1300 may further include one or more of the following components: a wireless communication module, an audio module, an external memory interface, an internal memory, a universal serial bus (USB) interface, a power management module, an antenna, a speaker, a microphone, an input / output module, a sensor module, a motor, a camera, a display, etc. It may be understood that in some embodiments, communication device 1300 may include more or fewer components, some components may be integrated, or some components may be separated. The components may be implemented by hardware, software, or a combination of software and hardware.

[0152] It should be noted that the communication device in the above embodiments may be a terminal device (or a network device), a circuit, a chip used in a terminal device (or a network device), or other combined devices, components, etc. having the functions of a terminal (or a network device). When the communication device is a terminal device (or a network device), the transceiver module may be a transceiver and may include an antenna, a radio frequency circuit, etc., and the processing module may be a processor, for example, a central processing module (CPU). When the communication device is a component having the functions of a terminal device (or a network device), the transceiver module may be a radio frequency unit, and the processing module may be a processor. When the communication device is a chip system, the communication device may be a field programmable gate array (FPGA), an application-specific integrated circuit (ASIC), a system-on-a-chip (SoC), a CPU, a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or other integrated chip. The processing module may be the processor of the chip system. The transceiver module or the communication interface may be an input / output interface or interface circuit of the chip system. For example, the interface circuit may be a code / data read / write interface circuit. The interface circuit may be configured to receive code instructions (the code instructions may be stored in a memory and read directly from the memory, or may be read from the memory through another device) and transmit the code instructions to the processor.The processor may be configured to execute the code instructions to perform the method in the above method embodiments. In another example, the interface circuit may alternatively be a signal transmission interface circuit between the communication processor and the transceiver machine.

[0153] When the communication device is a chip-type device or circuit, the device may include a transceiver unit and a processing unit. The transceiver unit may be an input / output circuit and / or a communication interface. The processing unit may be an integrated processor, a microprocessor, or an integrated circuit.

[0154] An embodiment of this application further provides a communication system. Specifically, the communication system includes at least one terminal device and at least one network device. For example, the communication system includes a terminal device and a network device configured to realize the relevant functions in FIG. 8. For details, please refer to the relevant description in the method embodiment. The details will not be described again in this specification.

[0155] An embodiment of the present application further provides a computer-readable storage medium containing instructions that, when executed on a computer, cause the computer to perform the method performed by the terminal device in Figure 8. Alternatively, when executed on a computer, the instructions cause the computer to perform the method performed by the first network device in Figure 8.

[0156] An embodiment of the present application further provides a computer program product including instructions that, when executed on a computer, cause the computer to perform the method performed by the terminal device in Figure 8. Alternatively, when executed on a computer, cause the computer to perform the method performed by the first network device in Figure 8.

[0157] An embodiment of the present application provides a chip system. The chip system includes a processor and may further include a memory configured to implement the functions of the terminal device in the above method, or to implement the functions of the network device in the above method. The chip system may include a chip, or may include a chip and other discrete components.

[0158] It should be understood that the sequence numbers of the above processes do not mean the execution order in various embodiments of this application, and the execution order of the processes should be determined according to the functions and internal logic of the processes, and should not be construed as any limitation on the implementation process of the embodiments of this application.

[0159] Those skilled in the art may recognize that, in combination with the illustrative logical blocks described in the embodiments disclosed in this specification, the steps may be realized by electronic hardware or a combination of computer software and electronic hardware. Whether a function is performed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to realize the described functions for each specific application, but the implementation method should not be considered to go beyond the scope of this application.

[0160] For the purpose of convenient and concise description, the detailed operation processes of the above systems, devices and units can be clearly understood by those skilled in the art by referring to the corresponding processes in the above method embodiments, and the details will not be described again in this specification.

[0161] In some embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the described device embodiments are merely examples. For example, the division into units is merely a logical division of function, and other divisions may be used in actual implementations. For example, multiple units or components may be combined or integrated into other systems, or some features may be ignored or not implemented. Furthermore, the shown or discussed mutual couplings or direct couplings or communication connections may be realized by using some interfaces. Indirect couplings or communication connections between devices or units may be realized in electronic, mechanical, or other forms.

[0162] The units described as separate parts may or may not be physically separate, and the parts shown as units may or may not be physical units, and may be located in one place or distributed across multiple network units. Some or all of the units may be selected based on actual requirements to achieve the objectives of the solutions of the embodiments.

[0163] When a function is realized in the form of a software functional unit and sold or used as an independent product, the function may be stored in a computer-readable storage medium. Based on this understanding, a part that essentially contributes to the technical solution of this application or a part of the technical solution may be embodied in the form of a software product. A computer software product is stored in a storage medium and includes some instructions that enable a computer device (which may be a personal computer, a server, a network device, etc.) to execute all or some of the steps of the method in the embodiments of this application. The above storage medium includes any medium that can store program code, such as a USB flash drive, a removable hard disk, a read-only memory (ROM), a RAM, a magnetic disk, or an optical disk.

[0164] It is apparent that those skilled in the art can make various modifications and variations to this application without departing from the scope of this application. This application intends to cover these modifications and variations of this application, provided that they fall within the scope of protection defined by the following claims and their equivalent technologies.

Claims

1. 1. A communication method comprising: receiving a carrier signal; transmitting a first signal, wherein an interval between a first frequency within a frequency band of the first signal and a center frequency of a carrier bandwidth is equal to or greater than a first frequency interval, and the first frequency is a frequency having a smallest frequency interval from the center frequency of the carrier bandwidth within the frequency band of the first signal; A method comprising:

2. The method of claim 1 , wherein the bandwidth of the first signal is less than or equal to the absolute value of the difference between half the carrier bandwidth and the first frequency spacing.

3. 3. The method of claim 1, wherein a frequency interval F between a center frequency of the first signal and a center frequency of a downlink carrier signal and a modulation data rate S used for the first signal satisfy that an absolute value of FS is equal to or greater than the first frequency interval.

4. F is F=1 / T / R bit Fulfilling S is S=1 / T / R bit / M is satisfied, T is the level duration of one symbol of the first signal, and R bit 4. The method of claim 3, wherein ∑ is the number of bit repetitions for the first signal and M is the number of Manchester encoding repetitions for the first signal.

5. The method according to any one of claims 1 to 4, wherein the first signal is a positioning reference signal.

6. 6. The method of claim 5, further comprising the step of transmitting a data signal, wherein a bandwidth of the data signal is greater than the bandwidth of the first signal and a center frequency of the bandwidth of the data signal is the same as a center frequency of the bandwidth of the first signal.

7. 6. The method of claim 5, further comprising the step of transmitting a data signal, wherein a center frequency of a bandwidth of the data signal is different from a center frequency of the bandwidth of the first signal, a distance between the first frequency within the bandwidth of the first signal and the center frequency of the carrier bandwidth is greater than a distance between a second frequency within the bandwidth of the data signal and the center frequency of the carrier bandwidth, and the second frequency is a frequency having a smallest frequency spacing from the center frequency of the carrier bandwidth within the bandwidth of the data signal.

8. 8. The method of claim 6 or 7, wherein the first signal is transmitted using a first number of bit repetitions and a first number of Manchester coding repetitions, and the data signal is transmitted using a second number of bit repetitions and a second number of Manchester coding repetitions, the first number of bit repetitions being different from the second number of bit repetitions and / or the first number of Manchester coding repetitions being different from the second number of Manchester coding repetitions.

9. 1. A communication method comprising: transmitting a carrier signal; receiving a first signal from a terminal device, wherein an interval between a first frequency within a frequency band of the first signal and a center frequency of a carrier is equal to or greater than a first frequency interval, and the first frequency is a frequency having a minimum frequency interval from the center frequency of the carrier within the frequency band of the first signal; A method comprising:

10. The method of claim 9 , wherein the first frequency interval is determined based on a phase noise power of a signal leakage.

11. 11. The method of claim 9 or 10, wherein the phase noise of the carrier signal within the frequency band of the first signal is below a first threshold.

12. The method of claim 11 , wherein the first signal is a positioning reference signal, and the first threshold is determined based on a minimum signal-to-interference-and-noise ratio (SINR) corresponding to a target positioning accuracy.

13. 13. The method according to any one of claims 9 to 12, wherein the bandwidth of the first signal is less than or equal to the absolute value of the difference between half a carrier bandwidth and the first frequency spacing.

14. 14. The method according to claim 9, wherein a frequency interval F between a center frequency of the first signal and a center frequency of a downlink carrier signal and a modulation data rate S used to transmit the first signal satisfy that an absolute value of FS is greater than or equal to the first frequency interval.

15. F is F=1 / T / R bit Fulfilling S is S=1 / T / R bit / M is satisfied, T is the level duration of one symbol of the first signal, and R bit 15. The method of claim 14, wherein M is the number of bit repetitions used for the first signal and M is the number of Manchester encoding repetitions used for the first signal.

16. 16. The method of claim 9, further comprising the step of receiving a data signal, wherein a bandwidth of the data signal is greater than the bandwidth of the first signal and a center frequency of the bandwidth of the data signal is the same as a center frequency of the bandwidth of the first signal.

17. 16. The method of claim 9, further comprising the step of receiving a data signal, wherein a center frequency of a bandwidth of the data signal is different from a center frequency of the bandwidth of the first signal, a distance between a first frequency within the bandwidth of the first signal and a center frequency of a carrier bandwidth is greater than a distance between a second frequency within the bandwidth of the data signal and the center frequency of the carrier bandwidth, and the second frequency is a frequency having a smallest frequency spacing from the center frequency of the carrier bandwidth within the frequency band of the data signal.

18. 18. The method of claim 16 or 17, wherein the first signal corresponds to a first number of bit repetitions and a first number of Manchester coding repetitions, and the data signal corresponds to a second number of bit repetitions and a second number of Manchester coding repetitions, the first number of bit repetitions being different from the second number of bit repetitions and / or the first number of Manchester coding repetitions being different from the second number of Manchester coding repetitions.

19. 1. A communication method comprising: transmitting, by a network device, a carrier signal; receiving the carrier signal by a label and transmitting a first signal, wherein an interval between a first frequency within a frequency band of the first signal and a center frequency of the carrier is equal to or greater than a first frequency interval, and the first frequency is a frequency having a minimum frequency interval from the center frequency of the carrier within the frequency band of the first signal; A method comprising:

20. 20. The method of claim 19, wherein the first frequency interval is determined based on a phase noise power of a signal leakage.

21. 21. The method of claim 19 or 20, wherein the phase noise of the carrier signal within the frequency band of the first signal is below a first threshold.

22. 22. The method of claim 21, wherein the first signal is a positioning reference signal, and the first threshold is determined based on a minimum signal-to-interference-and-noise ratio (SINR) corresponding to a target positioning accuracy.

23. 1. A communication device including a processing module and a transceiver module, the transceiver module is configured to receive a carrier signal and transmit a first signal, wherein an interval between a first frequency within a frequency band of the first signal and a center frequency of a carrier bandwidth is equal to or greater than a first frequency interval, and the first frequency is a frequency having a minimum frequency interval from the center frequency of the carrier bandwidth within the frequency band of the first signal; The apparatus, wherein the processing module is configured to determine a frequency band of the positioning reference signal.

24. 24. The apparatus of claim 23, wherein the bandwidth of the first signal is less than or equal to an absolute value of a difference between half the carrier bandwidth and the first frequency spacing.

25. 25. The apparatus of claim 23 or 24, wherein a frequency interval F between a center frequency of the first signal and a center frequency of a downlink carrier signal and a modulation data rate S used for the first signal satisfy that an absolute value of FS is greater than or equal to the first frequency interval.

26. F is F=1 / T / R bit Fulfilling S is S=1 / T / R bit / M is satisfied, T is the level duration of one symbol of the first signal, and R bit 26. The apparatus of claim 25, wherein n is a number of bit repetitions for the first signal and M is a number of Manchester encoding repetitions for the first signal.

27. 27. Apparatus according to any one of claims 23 to 26, wherein the first signal is the positioning reference signal.

28. The transceiver module includes:

28. The apparatus of claim 27, further configured to transmit a data signal, wherein a bandwidth of the data signal is greater than the bandwidth of the first signal and a center frequency of the bandwidth of the data signal is the same as a center frequency of the bandwidth of the first signal.

29. The transceiver module includes:

28. The apparatus of claim 27, further configured to transmit a data signal, wherein a center frequency of a bandwidth of the data signal is different from a center frequency of the bandwidth of the first signal, a distance between the first frequency within the bandwidth of the first signal and the center frequency of the carrier bandwidth is greater than a distance between a second frequency within the bandwidth of the data signal and the center frequency of the carrier bandwidth, and the second frequency is a frequency having a smallest frequency spacing from the center frequency of the carrier bandwidth within the bandwidth of the data signal.

30. 30. The apparatus of claim 28 or 29, wherein the first signal is transmitted using a first number of bit repetitions and a first number of Manchester coding repetitions, and the data signal is transmitted using a second number of bit repetitions and a second number of Manchester coding repetitions, the first number of bit repetitions being different from the second number of bit repetitions and / or the first number of Manchester coding repetitions being different from the second number of Manchester coding repetitions.

31. 1. A communication device including a processing module and a transceiver module, the transceiver module is configured to transmit a carrier signal and receive a first signal, wherein an interval between a first frequency within a frequency band of the first signal and a center frequency of a carrier bandwidth is equal to or greater than a first frequency interval, and the first frequency is a frequency having a minimum frequency interval from the center frequency of the carrier bandwidth within the frequency band of the first signal; The apparatus, wherein the processing module is configured to determine the frequency band of the positioning reference signal.

32. 32. The apparatus of claim 31, wherein the first frequency interval is determined based on a phase noise power of a signal leakage.

33. 33. The apparatus of claim 31 or 32, wherein the phase noise of the carrier signal within the frequency band of the first signal is below a first threshold.

34. 34. The apparatus of claim 33, wherein the first signal is the positioning reference signal, and the first threshold is determined based on a minimum signal-to-interference-and-noise ratio (SINR) corresponding to a target positioning accuracy.

35. 35. The apparatus of claim 31, wherein the bandwidth of the first signal is less than or equal to the absolute value of the difference between half the carrier bandwidth and the first frequency spacing.

36. 36. The apparatus of claim 31, wherein a frequency spacing F between a center frequency of the first signal and a center frequency of a downlink carrier signal and a modulation data rate S used to transmit the first signal satisfy that an absolute value of FS is greater than or equal to the first frequency spacing.

37. F is F=1 / T / R bit Fulfilling S is S=1 / T / R bit / M is satisfied, T is the level duration of one symbol of the first signal, and R bit 37. The apparatus of claim 36, wherein: ∑ i = 1 i ⁢ ... is the number of bit repetitions used for the first signal; and M i = the number of Manchester encoding repetitions used for the first signal.

38. The transceiver module includes:

38. The apparatus of claim 31, further configured to receive a data signal, wherein a bandwidth of the data signal is greater than the bandwidth of the first signal and a center frequency of the bandwidth of the data signal is the same as a center frequency of the bandwidth of the first signal.

39. The transceiver module includes:

38. The apparatus of claim 31, further comprising: a step of receiving a data signal, wherein a center frequency of a bandwidth of the data signal is different from a center frequency of the bandwidth of the first signal, a distance between the first frequency within the bandwidth of the first signal and the center frequency of the carrier bandwidth is greater than a distance between a second frequency within the bandwidth of the data signal and the center frequency of the carrier bandwidth, and the second frequency is a frequency having a smallest frequency spacing from the center frequency of the carrier bandwidth within the frequency band of the data signal.

40. 40. The apparatus of claim 38 or 39, wherein the first signal corresponds to a first number of bit repetitions and a first number of Manchester coding repetitions, and the data signal corresponds to a second number of bit repetitions and a second number of Manchester coding repetitions, the first number of bit repetitions being different from the second number of bit repetitions and / or the first number of Manchester coding repetitions being different from the second number of Manchester coding repetitions.

41. A communication device, The communication device includes a processor and a memory, the memory is configured to store a computer program, and the processor is configured to execute the computer program stored in the memory to cause the communication device to perform a method according to any one of claims 1 to 8, or to cause the communication device to perform a method according to any one of claims 9 to 18.

42. 1. A communication system comprising: The communication system comprises a terminal device and a network device, the terminal device being configured to implement a method according to any one of claims 1 to 8, and the network device being configured to implement a method according to any one of claims 9 to 18.

43. A communication system including a network device and a label, the network device is configured to transmit a carrier signal; The label is configured to receive the carrier signal and transmit a first signal, wherein the spacing between a first frequency within a frequency band of the first signal and a center frequency of the carrier is equal to or greater than a first frequency spacing, and the first frequency is a frequency having a minimum frequency spacing from the center frequency of the carrier within the frequency band of the first signal.

44. 44. The system of claim 43, wherein the first frequency interval is determined based on a phase noise power of a signal leakage.

45. 45. The system of claim 43 or 44, wherein the phase noise of the carrier signal within the frequency band of the first signal is less than a first threshold.

46. 46. ​​The system of claim 45, wherein the first signal is a positioning reference signal, and the first threshold is determined based on a minimum signal-to-interference-and-noise ratio (SINR) corresponding to a target positioning accuracy.

47. 1. A computer-readable storage medium, comprising: The computer-readable storage medium stores a computer program that, when executed by a computer, causes the computer to perform the method of any one of claims 1 to 8, or causes the computer to perform the method of any one of claims 9 to 18.

48. 1. A computer program product comprising: The computer program product stores a computer program which, when executed by a computer, causes the computer to perform the method of any one of claims 1 to 8, or causes the computer to perform the method of any one of claims 9 to 18.

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