Communication method and communication device

Abstract

The present application provides a communication method and a communication device, wherein a network device maps a first signal to a first resource and sends the first signal on the first resource. Accordingly, a terminal device receives the first signal on the first resource, wherein the first signal includes a first physical channel and a first reference signal, the first resource includes a first time domain symbol in the time domain, and the first resource is distributed with a spacing of one or two adjacent subcarriers in the frequency domain. The first signal in the present application can be used for both perception and communication, which helps to improve the working efficiency and performance of the perception and communication integrated system.

Description

Technical Field

[0001] The present application relates to the field of communications, and in particular to a method and device for integrating communications and perception. Background Art

[0002] Radar sensing, also known as radar detection, is widely used in air and ground traffic monitoring, weather detection, security surveillance, and electromagnetic imaging. As detection needs increase, relying solely on radar for wide-area detection becomes costly, especially in continuous networking. Given the abundant spectrum resources, large-scale deployment, and wide coverage of wireless communications, radar sensing and wireless communications can be integrated to meet both wireless and detection needs. Currently, signals in wireless communication systems are primarily used for communication. Designing sensing signals for integrated communication and sensing systems poses a pressing challenge. Summary of the Invention

[0003] The communication method and device provided in the embodiments of the present application can improve the working efficiency and performance of the communication and perception integrated device.

[0004] In a first aspect, a communication method is provided, which can be executed by a network device or a chip configured in the network device. The network device can be an access network device or a network unit that implements the corresponding functions of the access network device. The method includes: mapping a first signal to a first resource; sending the first signal on the first resource; wherein the first signal includes a first physical channel and a first reference signal, the first resource includes a first time domain symbol in the time domain, the first physical channel and the first reference signal are mapped to N subcarriers on the first time domain symbol, any two adjacent subcarriers in the N subcarriers are equally spaced, and the interval between any two adjacent subcarriers in the N subcarriers is a first interval, the first interval is one or two subcarriers, and N is a positive integer greater than 2. Applying the above scheme to perceptual communication can improve the working efficiency and performance of the perceptual communication integrated device. On the one hand, the mapping of the first signal at equal intervals in the frequency domain can cause repeated waveforms to appear in the time domain, which is equivalent to lengthening the cyclic prefix, reducing inter-symbol interference, and is beneficial to improving the reception quality of the echo signal, thereby improving the perception accuracy; the first signal is mapped at equal intervals of 1 or 2 subcarriers in the frequency domain, that is, the frequency domain density is 4 or 6, while the current CSI-RS has a maximum frequency domain density of 3. A higher frequency domain density can improve perception accuracy; the physical channels and RSs included in the first signal can both be used as perception signals at the same time; therefore, network equipment can use the first signal for higher-precision target perception. On the other hand, the first signal includes a first physical channel for carrying communication data, that is, the first physical channel can be used for perception and communication at the same time, which is beneficial to reducing the impact of increased system overhead caused by sending perception signals and improving communication throughput.

[0005] In conjunction with the first aspect, after sending the first signal, the method further includes: receiving an echo signal of the first signal, wherein the echo signal is used to sense a target. Furthermore, the network device can obtain a perception result of the sensed target based on the first signal and the echo signal of the first signal. In this way, the network device can further use the perception result to assist communication and improve communication quality.

[0006] In combination with the first aspect, before sending the first signal, it also includes: sending configuration information of the first signal; wherein the configuration information includes one or more of the following: time domain resource information of the first signal, frequency domain resource information of the first signal, code domain resource information of the first signal, or port number information of the first signal.

[0007] In combination with the first aspect, the method further includes: sending a second signal on a second resource, wherein the second resource and the first resource are time-divided and / or frequency-divided. The second signal is used for communication, and includes a second physical channel and a second reference signal (RS).

[0008] In the second aspect, a communication method is provided, which can be executed by a terminal device or a chip configured in the terminal device. The method includes: determining a first resource; receiving a first signal on the first resource; wherein the first signal includes a first physical channel and a first reference signal, the first resource includes a first time domain symbol in the time domain, the first physical channel and the first reference signal are mapped to N subcarriers on the first time domain symbol, any two adjacent subcarriers in the N subcarriers are equally spaced, and the interval between any two adjacent subcarriers in the N subcarriers is a first interval, the first interval is one or two subcarriers, and N is a positive integer greater than 2. Through this solution, the working efficiency and performance of the perception and communication integrated device can be improved.

[0009] In conjunction with the second aspect, before receiving the first signal, the method further includes: receiving configuration information of the first signal; wherein the configuration information includes one or more of the following: time domain resource information of the first signal, frequency domain resource information of the first signal, code domain resource information of the first signal, or port number information of the first signal. In this way, the terminal device can determine the mapping resource of the first signal based on the configuration information of the first signal.

[0010] In combination with the second aspect, after receiving the first signal, it also includes: processing the first signal and sending feedback information corresponding to the first signal.

[0011] In conjunction with the second aspect, the method further includes: receiving a second signal on a second resource, where the second resource and the first resource are time-divided and / or frequency-divided. Furthermore, the terminal device processes the second signal and sends feedback information corresponding to the second signal. The second signal is used for communication, and the second signal includes a second physical channel and a second RS. The terminal device may jointly process the first signal and the second signal to further improve communication performance.

[0012] In the first aspect and the second aspect, the following options are included.

[0013] Optionally, the first resource further includes a second time domain symbol in the time domain. The first time domain symbol and the second time domain symbol are respectively the nth symbol and the n+kth symbol in the same slot, where n and k are positive integers. For example, k is 7.

[0014] Optionally, the first physical channel and the first RS are also mapped to M subcarriers on the second time domain symbol; or, the first physical channel is also mapped to M subcarriers on the second time domain symbol, and the second time domain symbol does not carry the first RS. Any two adjacent subcarriers among the M subcarriers are equally spaced, and the interval between any two adjacent subcarriers among the M subcarriers is a second interval, and the second interval is equal to the first interval. If the second time domain symbol does not carry the first RS, the reference signal overhead can be reduced and the communication transmission capacity can be increased.

[0015] Optionally, the first resource includes a first time domain symbol, a second time domain symbol, a third time domain symbol, and a fourth time domain symbol in the time domain, where the four time domain symbols are the nth symbol, the n+1th symbol, the n+kth symbol, and the n+k+1th symbol in the same slot. For example, k is 7. When two symbols are sent together, the network device can receive the echo signal of the first signal for a longer time, which is conducive to sensing a longer distance.

[0016] Optionally, the first resource is a mapping resource corresponding to a first antenna port, and the first signal is mapped to mapping resources corresponding to the first antenna port and other O antenna ports, where O is a positive integer, and the first resource and the mapping resources corresponding to the other O antenna ports are frequency-divided or time-divided. The network device transmits perception signals in different scanning directions on different antenna ports, thereby accelerating the perception scanning speed while taking into account detection performance.

[0017] Optionally, the REs between any two adjacent subcarriers are zero-power, or the REs between any two adjacent subcarriers are mapping resources for the first signal corresponding to the other O antenna ports. On the one hand, the equally spaced mapping of the first signal in the frequency domain can result in a repeated waveform in the time domain, which is equivalent to lengthening the cyclic prefix, reducing inter-symbol interference, and helping to improve the reception quality of the echo signal, thereby improving perception accuracy. On the other hand, zero-power REs can also be used to measure interference from other network devices.

[0018] Optionally, the first RS is used to demodulate the first physical channel. Because the first signal includes the first RS for demodulating the first physical channel, scenarios in which the perceived beam direction and the communicated beam direction are inconsistent are supported, for example, the beam directions of the first signal and the second signal are inconsistent or the precoding is different.

[0019] Optionally, the first RS is used for channel measurement or interference measurement. When the perceived beam direction is the same as the communication beam direction, the first physical channel can be demodulated by RS on other communication resources. For example, through the second RS, the first signal may not contain the RS for demodulating the first physical channel, saving RS overhead. In addition, the feedback information corresponding to the first signal is CSI. The CSI fed back by the terminal device can be further used for beam management and resource scheduling. Since the first signal is sent more frequently in the time domain as a perception signal, the accuracy of the beam measurement can be improved.

[0020] Optionally, the first RS and the second RS are used for demodulation of the second physical channel. In this solution, the terminal device performs channel estimation in conjunction with multiple RSs, improving channel estimation accuracy and thereby improving demodulation performance of the second physical channel. This is particularly suitable for scenarios where the perceived beam direction is the same as the communication beam direction.

[0021] In a third aspect, a communication device is provided, comprising modules or units for executing the method in any possible implementation of the first aspect.

[0022] In a fourth aspect, a communication device is provided, comprising modules or units for executing the method in any possible implementation of the second aspect.

[0023] In a fifth aspect, a communication device is provided, comprising a processor. The processor is coupled to a memory and is configured to execute instructions in the memory, causing the communication device to perform the method of any possible implementation of the first aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a transceiver and / or an antenna. Optionally, the communication device may be a network device or a chip configured in the network device.

[0024] In a sixth aspect, a communication device is provided, comprising a processor. The processor is coupled to a memory and is configured to execute instructions in the memory, causing the communication device to perform the method of any possible implementation of the second aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a transceiver and / or an antenna. Optionally, the communication device may be a terminal device or a chip configured in the terminal device.

[0025] In a seventh aspect, a network device is provided that can implement the method in any possible implementation of the first aspect. Optionally, the network device can be a chip (such as a baseband chip or a communication chip) or a base station device, and can implement the above method through software, hardware, or hardware executing corresponding software.

[0026] In one possible implementation, the network device includes a processor and a memory. The processor is configured to support the network device in executing the method of any possible implementation of the first aspect; the memory is configured to store instructions and / or data. Optionally, the network device also includes a radio frequency unit and an antenna.

[0027] In another possible implementation, the network device includes a baseband unit and a transceiver unit. The baseband unit is configured to perform the actions implemented internally by the network device in any possible implementation method of the first aspect described above; and the transceiver unit is configured to perform the actions of the network device sending to or receiving from the outside.

[0028] In another possible implementation, the network device includes a processor and a transceiver. The processor is configured to support the network device in executing the method of any possible implementation of the first aspect. When the network device is a chip, the transceiver may be an input / output unit, such as an input / output circuit or an input / output interface.

[0029] In another possible implementation manner, the network device may include a unit module that performs corresponding actions in any possible implementation method of the first aspect.

[0030] In an eighth aspect, a terminal device is provided that can implement the method in any possible implementation of the second aspect. Optionally, the terminal device can be a chip (such as a communication chip) or a user device, and can implement the above method through software, hardware, or hardware executing corresponding software.

[0031] In one possible implementation, the terminal device includes a processor and a memory; the processor is configured to support the terminal device in performing the corresponding functions of any possible implementation method of the second aspect; and the memory is used to store instructions and / or data. Optionally, the terminal also includes a radio frequency circuit and an antenna.

[0032] In another possible implementation, the terminal device includes a processing device and a transceiver unit. The processing device includes a processor and a memory, and is configured to execute the actions implemented within the terminal device in any possible implementation method of the second aspect described above; the transceiver unit includes a radio frequency circuit and an antenna, and is configured to execute the actions of the terminal device sending to or receiving from the outside.

[0033] In another possible implementation, the terminal device includes a processor and a transceiver. The processor is configured to support the terminal device in executing the method of any possible implementation of the second aspect. When the terminal device is a chip, the transceiver may be an input / output unit, such as an input / output circuit or an input / output interface.

[0034] In another possible implementation manner, the terminal device may include a unit module that performs corresponding actions in any possible implementation method of the second aspect.

[0035] In a ninth aspect, a computer-readable storage medium is provided, storing a computer program or instruction, which, when executed, implements the method in any possible implementation of the first aspect.

[0036] In a tenth aspect, a computer-readable storage medium is provided, storing a computer program or instruction, which, when executed, implements the method in any possible implementation of the second aspect.

[0037] In an eleventh aspect, a processor is provided, comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive signals via the input circuit and transmit signals via the output circuit, so that the processor executes the method of any of the aforementioned aspects or any possible implementations of such aspects. Optionally, the processor is a chip, the input circuit is an input pin, the output circuit is an output pin, and the processing circuit is a transistor, a gate circuit, a flip-flop, and / or various logic circuits.

[0038] In the twelfth aspect, a computer program product is provided, which includes: a computer program (also referred to as code, or instructions), which, when executed, enables a computer to execute the method in any possible implementation of the first aspect.

[0039] In the thirteenth aspect, a computer program product is provided, which includes: a computer program (also referred to as code, or instructions), which, when executed, enables a computer to execute the method in any possible implementation of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic diagram of the communication and perception integration system of this application;

[0041] Figure 2A A resource map provided for this application;

[0042] Figure 2B Another resource map provided for this application;

[0043] Figure 2C Another resource map provided for this application;

[0044] Figure 2D Another resource map provided for this application;

[0045] Figure 2EAnother resource map provided for this application;

[0046] Figure 2F Another resource map provided for this application;

[0047] Figure 2G Another resource map provided for this application;

[0048] Figure 3 A flow chart of a communication method provided in this application;

[0049] Figure 4 A flow chart of another communication method provided by this application;

[0050] Figure 5 A schematic structural diagram of the communication device provided in this application;

[0051] Figure 6 A schematic structural diagram of the terminal device provided for this application;

[0052] Figure 7 This is a schematic structural diagram of the network device provided in this application. DETAILED DESCRIPTION

[0053] The technical solution in this application will be described below with reference to the accompanying drawings.

[0054] The methods and apparatus provided in the embodiments of the present application can be applied to various communication systems, particularly harmonized communication and sensing (HCS) systems. The communications in such systems include, but are not limited to, long-term evolution (LTE), fifth-generation (5G), new radio (NR), wireless-fidelity (WiFi), wireless communications related to the 3rd Generation Partnership Project (3GPP), or other wireless communications that may emerge in the future.

[0055] like Figure 1 The system 100 includes at least one network device, such as Figure 1 The network device 110 shown; the system 100 may also include at least one terminal device, such as Figure 1 The terminal device 120 shown; the system 100 may also include at least one sensed target, such as Figure 1The perceived target 130 shown is shown. The network device 110 has a communication function, that is, the network device 110 and the terminal device 120 can communicate through a wireless link and then exchange information. It can be understood that the network device and the terminal device can also be referred to as communication devices. The network device 110 has a perception function. For example, after the network device 110 sends a perception signal, it will receive an echo signal from the perceived target 130. The network device 110 can obtain the perception result of the perceived target based on the first signal and the echo signal of the first signal, such as the distance, angle, position, moving speed, or external dimensions of the perceived target. In this way, the network device 110 can further use the perception result to assist communication and improve the quality of communication. It should be noted that the perception function and the communication function can be implemented by the same network device or by multiple network devices working together, and the embodiment of the present invention is not limited thereto.

[0056] An integrated communication and perception system combines both communication and perception functions. This fusion offers the following advantages: Communication and radar perception functions share hardware, saving hardware costs; perception functions can be deployed directly at existing sites, making deployment easy; and it facilitates collaborative networking, utilizing perception results to aid communication and improve communication quality.

[0057] A network device is a network-side device with wireless transceiver capabilities. For example, the network device can be a base station, an evolved NodeB (eNodeB), a next-generation NodeB (gNB) in a 5G mobile communication system, a transmission reception point (TRP), a base station that has been evolved from 3GPP, an access node in a WiFi system, a wireless relay node, a wireless backhaul node, etc. The network device can include one or more co-located or non-co-located transmission and reception points. For another example, the network device can include a centralized unit (CU), a distributed unit (DU), or both a CU and a DU. In this way, some of the functions of a wireless access network device can be implemented through multiple network function entities. These network function entities can be network elements in hardware devices, software functions running on dedicated hardware, or virtualized functions instantiated on a platform (e.g., a cloud platform). For another example, in vehicle-to-everything (V2X) technology, the network device can be a road side unit (RSU). The multiple network devices in the communication system can be base stations of the same type or different types. The base station can communicate with the terminal device or communicate with the terminal device through a relay station. The network device in the present application can also be a device with a sensing function, which can send a sensing signal and receive and process the echo signal of the sensed target. In the embodiment of the present application, the communication device for realizing the function of the network device can be a network device, or a network device with some functions of a base station, or a device that can support the network device to realize the function, such as a chip system, which can be installed in the network device.

[0058] A terminal device is a user-side device with wireless transceiver capabilities. It can be a fixed device, mobile device, handheld device (such as a mobile phone), wearable device, in-vehicle device, or a wireless device built into any of the above devices (such as a communication module, modem, or chip system). Terminal devices are used to connect people, objects, and machines, and can be used in a wide range of scenarios, such as cellular communications, device-to-device (D2D) communications, vehicle-to-everything (V2X) communications, machine-to-machine / machine-type communications (M2M / MTC) communications, the Internet of Things (IoT), virtual reality (VR), augmented reality (AR), industrial control, self-driving, remote medical, smart grid, smart furniture, smart office, smart wearables, smart transportation, smart city, drones, robots, and other scenarios. For example, the terminal device may be a handheld terminal in cellular communication, a communication device in D2D, an IoT device in MTC, a surveillance camera in smart transportation and smart cities, or a communication device on a drone, etc. The terminal device may sometimes be referred to as user equipment (UE), user terminal, user device, user unit, user station, terminal, access terminal, access station, UE station, remote station, mobile device, or wireless communication device, etc.

[0059] Sensed targets refer to various tangible objects on the ground that can be sensed, such as mountains, forests, or buildings. They can also include movable objects such as vehicles, drones, pedestrians, and terminal devices. Sensed targets are objects that can be sensed by a network device with sensing capabilities and can feed electromagnetic waves back to the network device. Sensed targets may also be referred to as detected targets, sensed objects, detected objects, or sensed devices, though this is not a limitation in the present invention.

[0060] A perception signal is a signal used to perceive or detect a target. Alternatively, a perception signal is a signal used to perceive or detect environmental information. For example, a perception signal is an electromagnetic wave transmitted by a network device to perceive environmental information. A perception signal may also be referred to as a radar signal, radar perception signal, detection signal, radar detection signal, or environmental perception signal, although this is not limited in the present embodiment.

[0061] Before introducing the method of the embodiment of the present application, some technical terms related to the embodiment are first introduced.

[0062] 1. Resource: refers to wireless resources, including time domain resources, frequency domain resources, or code domain resources.

[0063] 2. Resource element (RE): The resource element with the smallest granularity. A resource element consists of a time domain symbol (hereinafter referred to as a symbol in the embodiment of the present invention) in the time domain and a subcarrier in the frequency domain. It can be uniquely identified by an index pair (k, l), where k is the subcarrier index and l is the symbol index.

[0064] 3. Resource block (RB): An RB is composed of It is composed of continuous subcarriers. is a positive integer. In the 5G system, It is equal to 12 and may be other values when applied to other systems. In the embodiment of the present invention, RB is defined only based on frequency domain resources and has nothing to do with time domain resources.

[0065] 4. Time Domain Symbol: A time domain symbol can also be called an orthogonal frequency division multiplexing (OFDM) symbol. It should be noted that time domain symbols can also be named in conjunction with other multiple access schemes, which is not limited in this embodiment of the present invention. The time domain symbol length can vary for different subcarrier spacings.

[0066] 5. Slot: A slot consists of N symbols, where N is a positive integer. For example, for a normal cyclic prefix (NCP), N is equal to 14; for an extended cyclic prefix (ECP), N is equal to 12. When the solution of the embodiment of the present invention is applied to other systems, N can also be other values. The length of a slot may be different for different subcarrier spacings, which is not limited by the embodiment of the present invention. For example, when the subcarrier spacing is 15 kHz and the CP is NCP, a slot is 1 ms (millisecond) and consists of 14 symbols.

[0067] 6. Physical channel: carries data information. For example, a physical channel can be a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), a physical broadcast channel (PBCH), a physical sidelink shared channel (PSSCH), a physical sidelink control channel (PSCCH), a physical sidelink broadcast channel (PSBCH), a physical sidelink feedback channel (PSFCH), a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), etc. New physical channel names may be introduced for subsequent evolving networking configurations, which are not limited in the embodiments of the present invention.

[0068] 7. Reference Signal (RS): Reference signals can be used for physical channel demodulation, channel measurement, interference measurement, or synchronization tracking. Reference signals can be demodulation reference signals (DMRS), channel state information reference signals (CSI-RS), sounding reference signals (SRS), phase-tracking reference signals (PT-RS), primary synchronization signals (PSS), or secondary synchronization signals (SSS). DMRS is used to demodulate the physical channel. For example, a network device or terminal device performs channel estimation based on the DMRS and then demodulates the physical channel based on the estimated channel value. CSI-RS is used to obtain channel state information. For example, a network device sends CSI-RS to a terminal device, and the terminal device obtains channel state information (CSI) based on the CSI-RS measurement and feeds the CSI back to the network device. The network device schedules the terminal device based on the CSI. Of course, reference signals can also be other types of reference signals or reference signals with other functions.

[0069] 8. Antenna port: abbreviated as port. A transmitting antenna identified by the receiving device, or a transmitting antenna that can be distinguished in space. An antenna port can be configured for each virtual antenna. Each virtual antenna can be a weighted combination of multiple physical antennas, and each antenna port can correspond to a reference signal port. Different signals transmitted by the same antenna port experience the same channel, that is, the channel of one RE on the same antenna port can be inferred from the channel of another RE. An antenna port corresponds to a set of time-frequency resource units.

[0070] Reference signals in 5G NR systems are primarily used for communication. The current CSI-RS and other RSs are subject to certain constraints in the frequency or time domain, making them unable to meet the requirements of different radar detection scenarios. For example, while existing CSI-RS signals can be flexibly configured in the time domain, their density in the frequency domain is low, resulting in low detection accuracy. Specifically, the current CSI-RS frequency domain density is a maximum of 3, meaning that a physical resource block (PRB) can transmit CSI-RS in a maximum of 3 REs, which are evenly spaced in the frequency domain. If the existing CSI-RS pattern is used, the frequency domain density is low, and while target detection is still possible, detection accuracy will be limited, such as by reducing the detection range. When the frequency domain density is low, the energy of the frequency domain correlation peak is reduced, which in turn reduces the signal-to-interference-plus-noise ratio (SINR), resulting in reduced detection accuracy. In actual radar perception environments, radar signals need to be designed based on detection accuracy requirements (including detection range, velocity estimation accuracy, etc.).

[0071] Below, the method provided in the embodiment of the present application is described in conjunction with the accompanying drawings. It can be understood that the method embodiment described below is only described by taking the execution subject as a network device and a terminal device as an example. The network device mentioned in the method embodiment can also be replaced by a chip configured in the network device, and the terminal device can also be replaced by a chip configured in the terminal device. The terminal device and the network device can specifically be the various forms mentioned above. In addition, although the embodiments of the present invention have been described with network devices and terminal devices, it can be understood that different functions in the method can be performed by different network devices. For example, different functions of the base station can be implemented by different network units. The different operations in this embodiment can be implemented by different network units that implement different functions of the base station. Of course, it can also be implemented by a certain network unit. The embodiment of the present invention is not limited to this. These or this network unit are collectively referred to as network devices.

[0072] FIG2 is a schematic diagram of resource mapping provided by an embodiment of the present application. The first signal and its resource mapping provided by an embodiment of the present application are described below with reference to FIG2.

[0073] The first resource is a resource to which the first signal is mapped, that is, a resource that carries the first signal. The first signal can be used as a perception signal.

[0074] The first resource includes a first time domain symbol in the time domain. The first time domain symbol is the nth symbol in a slot, where n is a positive integer, for example, n is 7 or 14. Schematically, as Figures 2A to 2GAs shown, the first time domain symbol is the 7th symbol in a slot.

[0075] Optionally, the first resource includes a first time domain symbol and a second time domain symbol in the time domain. Optionally, the first time domain symbol and the second time domain symbol are the nth symbol and the n+kth symbol in the same slot, respectively, where n and k are positive integers. For example, a slot includes 14 time domain symbols, k is 7, that is, the first time domain symbol and the second time domain symbol are the nth symbol and the n+7th symbol in the same slot, respectively. For example Figures 2A to 2G As shown, the first time domain symbol and the second time domain symbol are the 7th symbol and the 14th symbol in the same slot, respectively. The first time domain symbol and the second time domain symbol are evenly distributed in one slot, which is beneficial to channel estimation performance.

[0076] Optionally, the first resource includes a first time domain symbol, a second time domain symbol, a third time domain symbol, and a fourth time domain symbol in the time domain, wherein the first time domain symbol, the second time domain symbol, the third time domain symbol, and the fourth time domain symbol are the nth symbol, the n+1th symbol, the n+kth symbol, and the n+k+1th symbol in the same slot. For example, k is 7, that is, the four time domain symbols are the nth symbol, the n+1th symbol, the n+7th symbol, and the n+8th symbol in the same slot, respectively. For example Figure 2C As shown, the four symbols are the 6th, 7th, 13th, and 14th symbols in the same slot. When the first signal is sent on two consecutive symbols, for example, the 6th and 7th symbols are sent consecutively, and the 13th and 14th symbols are sent consecutively, the network device can receive the echo (specifically, as described in step S405 in the embodiment of the present invention) for a longer time, which is conducive to sensing a longer distance.

[0077] The first resource includes N REs. The N REs are located on N subcarriers on the first time domain symbol. The intervals between any two adjacent subcarriers in the N subcarriers are equal, and the interval between any two adjacent subcarriers in the N subcarriers is a first interval, the first interval is one or two subcarriers, and N is a positive integer greater than 2. It should be noted that in the embodiment of the present invention, adjacent subcarriers do not refer to continuous subcarriers, but to two subcarriers with the closest distance in the frequency domain. For example Figures 2A to 2G As shown, the REs carrying the first signal are gray and black squares. It can be seen that the first interval between any two adjacent REs is one subcarrier. k The subcarrier k satisfies formula 1:

[0078]

[0079] Where β is a power or amplitude scaling factor, r(t) is the modulation symbol and / or sequence to be transmitted by the first signal (including the modulation symbol carried by the first physical channel and the first reference signal sequence), and t is the index of the modulation symbol or sequence. The network device needs to indicate the values of C and k' to the terminal device. When C is equal to 2, it means that the first interval is 1 subcarrier, and when C is equal to 3, it means that the first interval is 2 subcarriers.

[0080] Optionally, the first resource includes N REs and M REs. The N REs are located on N subcarriers on the first time domain symbol, as described above. The M REs are located on M subcarriers on the second time domain symbol. Any two adjacent subcarriers in the M subcarriers are equally spaced, and there is a second interval between any two adjacent subcarriers in the M subcarriers, the second interval is one or two subcarriers, and the second interval is equal to the first interval. M is a positive integer greater than 2. Furthermore, N can be equal to M, and of course N may not be equal to M. Optionally, the N subcarriers and the M subcarriers can completely overlap, partially overlap, or not overlap at all in the frequency domain. Since the wireless channel may be different in different frequency domain REs, non-overlapping resource mapping is conducive to obtaining frequency domain diversity gain. As Figure 2A 、 2B Or as shown in 2D, N REs are 6 subcarriers on the 7th symbol, M REs are 6 subcarriers on the 14th symbol, and the N REs and the M REs completely overlap in the frequency domain. Figure 2E As shown, N REs are 6 subcarriers on the 7th symbol, and M REs are 6 subcarriers on the 14th symbol. The N REs and the M REs do not overlap at all in the frequency domain.

[0081] In the same time domain symbol, the REs of the first resource are distributed in the frequency domain at intervals of one or two adjacent subcarriers; in other words, the interval between any two adjacent subcarriers of the first resource in the frequency domain is one or two subcarriers; in other words, the first resource is distributed at equal intervals in the frequency domain, and equal intervals mean that the interval between two adjacent subcarriers is one or two subcarriers. For example Figures 2A to 2G As shown, the first signal is mapped in the frequency domain with a spacing of one adjacent subcarrier. It should be noted that, Figures 2A to 2G Each grid in represents a RE. Figures 2A to 2G Only one RB is shown in the frequency domain, but the embodiment of the present invention does not exclude the case where N REs are distributed across multiple RBs. For example, N REs correspond to 6*a or 4*a subcarriers in the frequency domain, where "*" represents a mathematical multiplication, a represents the number of RBs and is a positive integer, 6 or 4 represents 6 or 4 subcarriers on each RB, and the interval between any two adjacent subcarriers among the 6 subcarriers is 1 subcarrier, and the interval between any two adjacent subcarriers among the 4 subcarriers is 2 subcarriers.

[0082] Optionally, the RE between any two adjacent subcarriers in the first resource is a zero-power RE, that is, the network device transmits zero power on the RE between any two adjacent subcarriers. The zero-power RE can also be used to measure interference from other network devices.

[0083] Optionally, the RE between any two adjacent subcarriers can be a mapping resource of the first signal corresponding to other antenna ports. For example, the first resource is a mapping resource of the first signal corresponding to the first antenna port, and the RE between any two adjacent subcarriers is a mapping resource of the first signal corresponding to the second antenna port. Figure 2D shown.

[0084] In summary, the first signal is mapped to N subcarriers at equal intervals, and the RE left in the middle can be a zero-power RE or a mapping resource for the first signal corresponding to other antenna ports. On the one hand, the mapping of the first signal at equal intervals in the frequency domain can cause repeated waveforms to appear in the time domain, which is equivalent to lengthening the cyclic prefix, reducing inter-symbol interference, and helping to improve the reception quality of the echo signal, thereby improving the perception accuracy. On the other hand, the first signal is mapped at equal intervals of 1 or 2 subcarriers in the frequency domain, that is, the frequency domain density is 4 or 6, while the current CSI-RS has a maximum frequency domain density of 3. A higher frequency domain density can improve perception accuracy. In addition, when the first physical channel and the first reference signal in the first signal are on the same symbol, the terminal device can directly demodulate the data carried by the first physical channel through the first reference signal without relying on the reference signals carried on other symbols. In this way, the network device can configure the precoding of the first signal to be different from the precoding on other symbols, which can be used to perceive targets in different spatial directions.

[0085] The first signal includes a first physical channel and a first RS. Optionally, the first physical channel carries downlink control information (DCI), unicast data, multicast data or broadcast data. Optionally, the first physical channel can be a downlink physical channel, such as PDSCH, PDCCH or PBCH. For example, the first physical channel is PDCCH, and the first PDCCH carries DCI. For another example, the first physical channel is PDSCH, and the PDSCH carries unicast data or broadcast data or multicast data. For another example, the first physical channel is PBCH, and the PBCH carries a master information block (MIB). Optionally, in addition, the first physical channel can also be a sidelink physical channel, such as PSSCH, PSBCH or PSCCH. For example, the network device is an on-board device, which generates a first sidelink physical channel.

[0086] The first RS in the embodiment of the present invention may be a newly designed RS, for example, an RS for sensing, and the first RS may also be a currently defined RS. Optionally, in one embodiment, the first RS may be used to demodulate the first physical channel, for example, the first RS may be a DMRS for demodulating the first downlink physical channel or the first sidelink physical channel. Optionally, in another embodiment, the first RS may be used for channel measurement or interference measurement, for example, the first RS may be a CSI-RS. Optionally, in another embodiment, the first RS is used for phase tracking, for example, the first RS may be a PT-RS. Optionally, in another embodiment, the first RS may be used for time-frequency synchronization or tracking, for example, the first RS may be a PSS or SSS. Therefore, the first RS may be an RS for at least one of the following purposes: for demodulating the first physical channel, for channel measurement or interference measurement, for phase tracking, or for time-frequency synchronization or tracking.

[0087] In one embodiment, the first signal includes a first physical channel and a first RS for demodulating the first physical channel. The time-frequency domain pattern of the first signal meets the detection accuracy requirement, so the first signal can be used for perception. The first signal includes the first physical channel, so the first signal can be used for communication. In addition, because the first signal also includes the first RS for demodulating the first physical channel, this embodiment supports scenarios where the beam direction of perception and the beam direction of communication are inconsistent. For example, the beam direction of the first signal and the beam direction of the second signal (used as a communication signal as described in step S409) may be inconsistent. Of course, this embodiment can also support scenarios where the beam direction of perception and the beam direction of communication are the same. In this case, multiple RSs can be combined to perform channel estimation, improve the channel estimation accuracy, and thereby improve the demodulation performance of the physical channel.

[0088] In another embodiment, the first signal includes a first physical channel and a first RS for channel measurement or interference measurement. The time-frequency domain pattern of the first signal meets the detection accuracy requirements, so the first signal can be used for perception. The first signal includes the first physical channel, so the first signal can be used for communication. This embodiment supports a scenario in which the beam direction of perception is the same as the beam direction of communication, for example, the beam direction of the first signal is the same as the beam direction of the second signal (used as a communication signal as described in step S409 in the embodiment of the present application). In this way, the RS contained in the second signal can be used for demodulation of the first physical channel, and the first signal may not include the RS for demodulating the first physical channel, saving RS overhead.

[0089] The first physical channel and the first RS are mapped to the N subcarriers on the first time domain symbol. In other words, the first physical channel and the first RS are mapped to the above-mentioned N REs. For example, Figures 2A to 2GAs shown, the first time domain symbol is the 7th symbol in a slot, and the first interval is one subcarrier, that is, the first physical channel and the first RS are mapped to 6 subcarriers on the 7th symbol in a slot.

[0090] Optionally, on the same first time domain symbol, the first physical channel is mapped to X subcarriers on the first time domain symbol, and the first RS is mapped to (NX) subcarriers on the first time domain symbol, where X is a positive integer. Optionally, X is N / 2, that is, the first physical channel and the first RS are respectively mapped to N / 2 subcarriers on the first time domain symbol, for example, Figure 2A Optionally, X is less than N / 2, that is, the first RS occupies less resources, increasing the communication transmission capacity, for example Figure 2F shown.

[0091] In an optional embodiment, the first physical channel and the first RS are mapped to N subcarriers on the first time domain symbol and M subcarriers on the second time domain symbol. That is, in addition to the first time domain symbol, the first physical channel and the first RS are also mapped to M subcarriers on the second time domain symbol. The content carried on the second time domain symbol may be the same as or different from the content carried on the first time domain symbol. For example, Figure 2A , as shown in 2D, 2E or 2F, the first interval and the second interval are one subcarrier, and the first physical channel and the first RS are mapped to 6 subcarriers on the 7th symbol and the 14th symbol in the same slot.

[0092] Optionally, the first physical channel and the first RS are mapped to N subcarriers on the first time domain symbol, and the first physical channel is also mapped to M subcarriers on the second time domain symbol, and the second time domain symbol does not carry the first RS. That is, in one slot, the first physical channel is mapped to the first time domain symbol and the second time domain symbol, and the first RS is only mapped to the first time domain symbol. For example, Figure 2B Or as shown in 2G, the first time domain symbol is the 7th symbol in a slot, which includes the first physical signal and the first RS. The second time domain symbol is the 14th symbol in the slot, which does not include the first RS but only includes the first physical signal. Furthermore, the precoding on the 14th symbol can be the same as the precoding on the 7th symbol. In this way, the RS does not need to be sent on the 14th symbol. The first physical channel carried on the 14th symbol can perform channel estimation and then demodulate data based on the reference signal on the 7th symbol. Since the RS is only sent on one time domain symbol, the reference signal overhead can be reduced and the communication transmission capacity can be increased.

[0093] Optionally, the first signal is mapped to multiple antenna ports, that is, the first physical channel and the first RS are mapped to multiple antenna ports. The first resource is the mapping resource corresponding to the first antenna port. The mapping resources of the first signal corresponding to different antenna ports are frequency-divided or time-divided, so that the first signals on multiple antenna ports do not interfere with each other. For example, the RE between any two adjacent subcarriers is the mapping resource of the first signal corresponding to other antenna ports. Step S403 includes: the network device maps the first signal to the first resource corresponding to the first antenna port and the mapping resources corresponding to the other O antenna ports, where O is a positive integer, and the first resource and the mapping resources corresponding to the other O antenna ports are frequency-divided or time-divided. As Figure 2D As shown, the first signal is mapped to the first antenna port and the second antenna port, and the signals on the two antenna ports are frequency-divided. The network device transmits sensing signals in different scanning directions on different antenna ports, which speeds up the sensing scanning speed while taking into account detection performance.

[0094] Figure 3 1 is a schematic flow chart of a communication method provided in an embodiment of the present application. The method includes the following steps.

[0095] S301: The terminal device determines a first resource.

[0096] S302: The network device maps the first signal to a first resource.

[0097] S303: The network device sends a first signal on a first resource. Correspondingly, the terminal device receives the first signal on the first resource.

[0098] In step S301, the terminal device may determine the first resource carrying the first signal according to Formula 1. Of course, the network device may also determine the first resource according to configuration information sent by the network device to the terminal device.

[0099] Furthermore, in step S302, the network device maps the first physical channel and the first RS to N subcarriers on the first time domain symbol, where any two adjacent subcarriers in the N subcarriers are equally spaced, and the interval between any two adjacent subcarriers in the N subcarriers is a first interval, where the first interval is one or two subcarriers, and N is a positive integer greater than 2. In step S303, the network device sends the first physical channel and the first RS on the N subcarriers of the first time domain symbol, and accordingly, the terminal device receives the first physical channel and the first RS on the N subcarriers of the first time domain symbol.

[0100] In an embodiment of the present application, the first signal is mapped in the frequency domain with an equal interval of 1 or 2 subcarriers, that is, the frequency domain density is 4 or 6 (while the current CSI-RS has a maximum frequency domain density of 3). In addition, the physical channel and RS included in the first signal can be used as perception signals at the same time. Therefore, the network device can use the first signal to perform target perception with higher precision. On the other hand, the first signal includes a first physical channel for carrying communication data, that is, the first signal can be used for perception and communication at the same time, which is beneficial to reduce the impact of increased system overhead caused by sending perception signals and improve communication throughput. In summary, through this solution, the working efficiency and performance of the perception and communication integrated device can be improved.

[0101] based on Figure 3 The plan, Figure 4 A detailed communication method example is provided. Figure 4 The steps shown are explained below. Figure 4 The steps indicated by dotted lines are optional and will not be described in detail in the following text.

[0102] S401: The network device sends configuration information of a first signal to the terminal device. Correspondingly, the terminal device receives the configuration information of the first signal sent by the network device.

[0103] Optionally, the configuration information of the first signal may include one or more of the information for indicating the time domain, frequency domain, code domain or port number of the carrier of the first signal. That is, the configuration information of the first signal may include one or more of the following: time domain resource information of the first signal, frequency domain resource information of the first signal, code domain resource information of the first signal, or port number information of the first signal. For example, the configuration information of the first signal includes the time domain resource information of the first signal and the frequency domain resource information of the first signal, but does not include the code domain resource information of the first signal and the port number information of the first signal. Alternatively, the configuration information of the first signal includes the code domain resource information of the first signal, but does not include the time domain resource information of other first signals, the frequency domain resource information of the first signal, and the port number information of the first signal.

[0104] Optionally, the configuration information may be carried via high-layer signaling and / or physical layer signaling. For example, the configuration information includes frequency domain resource information of the first signal and port number information of the first signal, wherein the frequency domain resource information of the first signal is carried via RRC signaling, and the port number information of the first signal is carried via physical layer signaling. For example, the high-layer signaling is radio resource control (RRC) signaling.

[0105] In this embodiment of the present invention, the configuration information of the first signal can be used to indicate the first resource. Therefore, the configuration information of the first signal can also be referred to as the configuration information of the first resource. For example, step S401 can be replaced by: the network device sends the configuration information of the first resource to the terminal device. Correspondingly, the terminal device receives the configuration information of the first resource sent by the network device.

[0106] S402: The terminal device determines a first resource.

[0107] The terminal device may determine the first resource based on the configuration information of the first signal. For example, the terminal device determines the first resource based on the time domain resource and / or code domain resource indicated by the configuration information. Alternatively, the terminal device may determine the first resource carrying the first signal according to a predefined rule (for example, the rule is Formula 1) or a pre-stored rule.

[0108] Optionally, the first signal is mapped to multiple antenna ports. The first resource is a mapping resource corresponding to the first antenna port. Step S402 includes: the terminal device determines the first resource corresponding to the first antenna port and mapping resources corresponding to other O antenna ports, where O is a positive integer. For a detailed description and effect, see step S403.

[0109] S403: The network device maps the first signal to a first resource.

[0110] In one embodiment, the first physical channel and the first RS are mapped to N subcarriers on the first time domain symbol and M subcarriers on the second time domain symbol. Accordingly, step S403 includes: the network device maps the first physical channel and the first RS to N subcarriers on the first time domain symbol and M subcarriers on the second time domain symbol. In other words, the first physical channel and the first reference signal are mapped to N REs and M REs. Accordingly, step S402 includes: the network device maps the first physical channel and the first RS to N REs and M REs.

[0111] In another embodiment, the first physical channel and the first RS are mapped to N subcarriers on the first time domain symbol, and the first physical channel is also mapped to M subcarriers on the second time domain symbol, and the second time domain symbol does not carry the first RS. Accordingly, step S402 includes: the network device maps the first physical channel and the first RS to N subcarriers on the first time domain symbol, and also maps the first physical channel to M subcarriers on the second time domain symbol. In other words, the first physical channel and the first RS are mapped to N REs, and the first physical channel is also mapped to M REs. The M REs do not carry the first RS. Accordingly, step S403 includes: the network device maps the first physical channel and the first RS to N REs, and also maps the first physical channel to M REs.

[0112] It should be noted that the network device maps the first signal to the first resource, which is a step in the network device generating the first signal. Step S403 can also be replaced by "the network device generates the first signal." The network device generates the first signal, including: the network device generates a first physical channel and a first RS. For example, the network device generates the first physical channel including: the network device encodes the data information carried by the first physical channel, scrambles, modulates, multi-antenna correlation processing (only for multiple antennas), resource mapping (that is, the network device maps the first physical channel to the resources in the first resource used for the first physical channel), OFDM baseband signal generation processing, etc. For example, the network device generates the first RS including: first RS sequence generation, resource mapping (that is, the network device maps the first RS to the resources in the first resource used for the first RS), OFDM baseband signal generation processing, etc.

[0113] S404: The network device sends a first signal to the terminal device. Correspondingly, the terminal device receives the first signal sent by the network device.

[0114] The first signal is used as a sensing signal, so the network device also sends the first signal to the sensed target at the same time.

[0115] The network device sends a first signal to the terminal device on a first resource. Optionally, the network device sends the first signal on mapped resources corresponding to multiple antenna ports. Correspondingly, the terminal device receives the first signal sent by the network device on the first resource. Optionally, the terminal device receives the first signal sent by the network device on mapped resources corresponding to multiple antenna ports.

[0116] Although S401 and S404 are described with respect to a single terminal device, the network device may send the first signal or configuration information of the first resource to one or more terminal devices, and this is not a limitation in the present embodiment. For example, the first physical channel carries group / cast data, and the network device sends the first signal to multiple terminal devices. For example, the group / broadcast data may be a video, a dynamic layer, or road safety information.

[0117] S405: The network device receives an echo signal of the first signal.

[0118] This echo signal is used to sense the target and corresponds to the sensed target. That is, the first signal is transmitted, scattered, and reflected by the sensed target to generate an electromagnetic feedback signal, i.e., the echo signal. The sensed target can be one or more, and this is not limited in this embodiment of the present invention.

[0119] S406: The network device processes the echo signal of the first signal.

[0120] For example, the network device obtains a perception result of the perceived target based on the first signal and the echo signal of the first signal, such as the distance, angle, position, movement speed, or dimensions of the perceived target. In this way, the network device can further use the perception result to assist communication and improve communication quality.

[0121] Network devices use a self-transmitting and self-receiving mechanism. After sending a first signal, they receive and process the echo signal of the first signal. For example, if the base station sends the first signal at time t and receives the echo signal at time t+k, the estimated distance to the perceived target is approximately: ((t+k)-t)*c / 2, where c is the speed of light.

[0122] S407: The terminal device processes the first signal.

[0123] S408: The terminal device sends feedback information corresponding to the first signal to the network device. Correspondingly, the network device receives the feedback information corresponding to the first signal sent by the terminal device.

[0124] Exemplarily, the first physical channel is the first PDSCH, and the first RS is the DMRS used for demodulating the first PDSCH. S407 includes: the terminal device performs channel estimation based on the first RS, and then demodulates the first PDSCH based on the channel estimation result. S408 includes: the terminal device sends HARQ-ACK (Hybrid Automatic RepeatRequest-Acknowledgement) feedback information corresponding to the first signal to the network device. If the first PDSCH is demodulated correctly, the terminal device returns ACK (Acknowledgement, correct response) information; if the downlink data demodulation is erroneous, the terminal device returns NACK (Non-Acknowledgement, error response) information.

[0125] Exemplarily, the first RS is an RS used for channel measurement or interference measurement, such as CSI-RS. S407 includes: the terminal device performs channel measurement or interference measurement according to the first RS to obtain channel state information CSI. S408 includes: the terminal device sends CSI to the network device. CSI includes at least one of the following information: rank indicator (RI), precoding matrix indicator (Precoding matrix indicator), channel quality indicator (CQI), L1-RSRP (Reference signal receive power, RSRP), beam index or reference signal resource index, etc. The CSI fed back by the terminal device can be further used for beam management and resource scheduling, etc. Since the first signal is sent more frequently in the time domain as a perception signal, the accuracy of beam measurement can be improved. For example, in beam management, the network device can obtain the signal strength of the measured radar beam based on the feedback L1-RSRP, thereby reducing the beam measurement overhead. If the first signal (i.e., the perception signal) is not used for beam measurement, the network device needs to configure additional reference signal resources for CSI measurement, resulting in large system overhead.

[0126] S409: The network device sends a second signal to the terminal device. Correspondingly, the terminal device receives the second signal sent by the network device.

[0127] The second signal is used for communication, that is, the second signal is a communication signal, that is, a signal transmitted in a communication system.

[0128] The second signal is mapped to the second resource. Optionally, the second resource and the first resource include different REs. For example Figure 2E As shown, the second resource and the first resource include different REs. Optionally, the second resource and the first resource are time-divided and / or frequency-divided, that is, the second resource and the first resource are different time domain resources and / or frequency domain resources. For example, the second resource is part or all of the resources available for the second signal, such as Figure 2A , 2B, 2C or 2D, the second signal and the first signal are located in different time domain resources.

[0129] The network device transmits a second signal to the terminal device on the second resource. Optionally, the network device transmits the second signal on mapped resources corresponding to multiple antenna ports. Correspondingly, the terminal device receives the second signal transmitted by the network device on the second resource. Optionally, the terminal device receives the second signal transmitted by the network device on mapped resources corresponding to multiple antenna ports. Prior to S409, the process also includes: the network device mapping the second signal to the second resource.

[0130] Optionally, before S409 , the method further includes: the terminal device receives configuration information of the second signal; and the terminal device determines the second resource according to the configuration information of the second signal.

[0131] S410: The terminal device processes the second signal, or the terminal device jointly processes the first signal and the second signal.

[0132] The second signal includes a second physical channel and a second RS.

[0133] Optionally, the first RS and the second RS are used for demodulation of the second physical channel. In this case, the first signal and the second signal have the same precoding or the same beam direction. Step S410 includes: the terminal device performs channel estimation using the first RS and the second RS, and then demodulates the second physical channel based on the channel estimation result. This solution can enhance channel estimation accuracy and improve the demodulation performance of the second physical channel. Similarly, the first RS and the second RS can also be used for demodulation of the first physical channel.

[0134] Optionally, the one or two TB blocks carried by the first physical channel are different from the one or two TB blocks carried by the second physical channel. However, as long as the first signal and the second signal have the same precoding or the same beam direction, they can also be jointly processed.

[0135] Optionally, the first physical channel and the second physical channel carry the same TB block or the same multiple TB blocks. For example, the first signal includes a first PDSCH and a first CSI-RS, and the second signal includes a second PDSCH and a second RS for demodulating the first PDSCH and the second PDSCH, wherein the first PDSCH and the second PDSCH carry different parts of the same TB block after encoding.

[0136] If the network device does not jointly process the first signal and the second signal, the specific process of S410 is similar to step S407, except that "first" is replaced by "second", which will not be repeated here.

[0137] S411: The terminal device sends feedback information corresponding to the second signal to the network device. Correspondingly, the network device receives the feedback information corresponding to the second signal sent by the terminal device.

[0138] The specific process of S411 is similar to step S408, except that "first" is replaced by "second", which will not be repeated here.

[0139] It should be noted that the second signal can be generated by the network device (described in steps S401 to S411) or other network devices, and sent to the terminal device (described in steps S401 to S411) and / or other terminal devices. Furthermore, the terminal device and / or other terminal devices send feedback information corresponding to the second signal to the network device or other network devices, and this embodiment of the present invention does not limit this.

[0140] It should be noted that, in various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the order of execution. The order of execution of each process should be determined by its function and internal logic. The various digital numbers or sequence numbers involved in the above-mentioned processes are only for the convenience of description and do not constitute any limitation on the implementation process of the embodiments of the present application. For example, S402 and S403 can be performed simultaneously, or S402 or S403 can be the first step. For example, S406 and S407 can be performed simultaneously, or S406 and S407 can be the first step.

[0141] In an embodiment of the present application, on the one hand, the network device can use the first signal to perform target perception with higher precision. The mapping of the first signal at equal intervals in the frequency domain can cause a repeated waveform to appear in the time domain, which is equivalent to lengthening the cyclic prefix, reducing inter-symbol interference, and is beneficial to improving the reception quality of the echo signal, thereby improving the perception accuracy; the first signal is mapped at equal intervals of 1 or 2 subcarriers in the frequency domain, that is, the frequency domain density is 4 or 6, while the current CSI-RS frequency domain density is a maximum of 3. A higher frequency domain density can improve perception accuracy; the physical channel and RS included in the first signal can both be used as perception signals at the same time. On the other hand, the first signal includes a first physical channel for carrying communication data, that is, the first signal can be used for perception and communication at the same time, which is beneficial to reducing the impact of increased system overhead caused by sending perception signals and improving communication throughput. On the other hand, the first signal and the second signal are jointly processed to further improve communication performance. In summary, through this solution, the working efficiency and performance of the integrated perception and communication system can be improved.

[0142] Figure 5 A schematic diagram of the structure of a communication device provided in an embodiment of the present application is given. It should be noted that: Figure 5 The parts indicated by the dotted box are optional and will not be described in detail in the following text.

[0143] The communication device 1000 includes one or more processors 1100. The processor 1100 may also be referred to as a processing unit, and may be used to perform internal processing of the device and implement certain control processing functions. Optionally, the processor 1100 includes instructions 1300. Optionally, the processor 1100 may store data. The processor 1100 may be a general-purpose processor or a dedicated processor. For example, it may include at least one of the following: a baseband processor, 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, and / or a neural network processor. Different processors may be independent devices or may be integrated into one or more processors, for example, integrated into one or more dedicated integrated circuits.

[0144] Optionally, the communication device 1000 includes one or more memories 1200 for storing instructions 1400. Optionally, data may also be stored in the memories 1200. The processor and memory may be provided separately or integrated together.

[0145] Optionally, the communication device 1000 may further include a transceiver 1500 and / or an antenna 1600. The transceiver 1500 may be used to send information to or receive information from other devices. The transceiver 1500 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, a transceiver, an input / output interface, etc., and is used to implement the transceiver functions of the communication device 1000 through the antenna 1600.

[0146] Optionally, the communication device 1000 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, or a display screen, etc. These components may be implemented as hardware, software, or a combination of software and hardware.

[0147] The processor 1100 executes instructions (sometimes also referred to as computer programs or codes) stored in the communication device 1000. That is, the instructions stored in the communication device can be run on the processor 1100, so that the communication device 1000 performs the method described in the above embodiment. Optionally, the instruction is an instruction 1300 in the processor 1100, or the instruction is an instruction 1400 in the memory.

[0148] In one implementation, the communication device 1000 can be used to implement the method corresponding to the network device in the above-mentioned application embodiment. For specific functions, please refer to the description of the above-mentioned embodiment and will not be repeated here. Exemplarily, the communication device 1000 includes a processor 1100, and the processor 1100 is used to execute a computer program or instruction so that the method corresponding to the network device in the above-mentioned application embodiment is executed. Exemplarily, the processor 1100 is used to map the first signal to a first resource, and the transceiver 1500 is used to send the first signal on the first resource. The communication device 1000 can be a network device or a chip configured in a network device.

[0149] In another implementation, the communication device 1000 can be used to implement the method corresponding to the terminal device in the above-mentioned application embodiment. For specific functions, please refer to the description of the above-mentioned embodiment and will not be repeated here. Exemplarily, the communication device 1000 includes a processor 1100, and the processor 1100 is used to execute a computer program or instruction so that the method corresponding to the terminal device in the above-mentioned application embodiment is executed. Exemplarily, the processor 1100 is used to determine a first resource, and the transceiver 1500 is used to receive the first signal on the first resource. The communication device 1000 can be a terminal device or a chip configured in a terminal device.

[0150] The processor 1100 and transceiver 1500 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 application specific integrated circuit (ASIC), a printed circuit board (PCB), or an electronic device. The communication device described herein may be a standalone device (e.g., a standalone integrated circuit, a mobile phone, etc.), or may be part of a larger device (e.g., a module that can be embedded in another device). For details, please refer to the aforementioned description of the terminal device and the network device, which will not be repeated here.

[0151] Figure 6 This is a simplified structural diagram of a network device provided in an embodiment of the present application, for example, a simplified structural diagram of a base station. The network device 2000 can be applied to Figure 1 In the system shown, the operations or functions of the network device in the above method embodiment are executed. For details, please refer to the description in the above method embodiment, which will not be repeated here.

[0152] The network device 2000 includes: a processor 2101, a memory 2102, a radio frequency unit 2201, and an antenna 2202. The processor 2101, also known as a processing unit, is configured to support the network device in executing the functions of the network device in the above-described method embodiment. The processor 2101 may be one or more processors. The one or more processors may support wireless access technologies of the same standard or different standards (e.g., LTE and NR). In one implementation, the processor 2101 is an integrated circuit, such as one or more ASICs, one or more DSPs, one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits may be integrated together to form a chip. The memory 2102, also known as a storage unit, is configured to store instructions (sometimes also referred to as computer programs or code) and / or data. The memory 2102 may be a single memory or a collective term for multiple memories or storage elements. The memory 2102 and the processor 2101 may be located in the same chip or on different chips. The radio frequency unit 2201 may be one or more radio frequency units. The antenna 2202 is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves, for example, used for the network device 2000 to send signals to or receive signals from a terminal device.

[0153] Optionally, the baseband unit 2100 (BBU) includes a processor 2101 and a memory 2102, which are mainly used for baseband processing of signals, managing wireless resources, providing transmission management and interfaces, providing clock signals and other functions. Optionally, the BBU 2100 can be composed of one or more single boards, and multiple single boards can jointly support a wireless access network with a single access standard (such as an LTE network), or can separately support wireless access networks with different access standards (such as an LTE network, a 5G network or other networks). The memory 2201 and the processor 2202 can serve one or more single boards. In other words, a memory and a processor can be set separately on each single board. Alternatively, multiple single boards can share the same memory and processor. In addition, necessary circuits can also be set on each single board.

[0154] Optionally, the transceiver unit 2200 includes a radio frequency unit 2201 and an antenna 2202, and is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals into baseband signals.

[0155] Optionally, the radio frequency unit 2201 is a remote radio unit (RRU), and the RRU and the BBU may be physically arranged together or physically separated, that is, a distributed base station.

[0156] Optionally, the transceiver unit 2100 can be an active antenna unit (AAU), a hardware product that integrates RF functionality with an antenna. The RF unit 2201 in the AAU is a dedicated RF module for the AAU, with the same functionality as the RRU. Optionally, the AAU can also include some baseband processing functionality.

[0157] Optionally, BBU 2100 can be used to perform the actions implemented within the network device described in the previous method embodiments, while transceiver unit 2200 can be used to perform the actions described in the previous method embodiments, where the network device sends or receives data from the terminal device. For example, BBU 2100 maps the first signal to a first resource, and transceiver unit 2200 transmits the first signal on the first resource. For a detailed description, please refer to the above method embodiments and will not be repeated here.

[0158] Figure 7 This is a simplified structural diagram of a terminal device provided in an embodiment of the present application. The terminal device 3000 can be used for Figure 1 In the system shown, the operations or functions of the terminal device in the above method embodiment are executed. For details, please refer to the description in the above method embodiment, which will not be repeated here.

[0159] The terminal device 3000 includes a processor 3100, a memory 3200, a radio frequency circuit 3300 and an antenna 3400. The processor 3100 is mainly used to process communication protocols and communication data, as well as to control the terminal, execute instructions (sometimes also referred to as computer programs or codes), process data, etc. The processor 3100 can also be called a processing unit, a processing board, a processing module, a processing device, etc. The memory 3200 is mainly used to store instructions (sometimes also referred to as computer programs or codes) and data. The memory can also be called a storage medium or a storage device, etc. The radio frequency circuit 3300 is mainly used for converting baseband signals into radio frequency signals and processing radio frequency signals. The antenna 3400 is mainly used for transmitting and receiving radio frequency signals in the form of electromagnetic waves, for example, for the terminal device 3000 to send or receive signals to a network device. Optionally, the terminal device 3000 also includes an input and output device 3500, such as a touch screen, a display screen, a microphone and a keyboard, which are mainly used to receive user input data and output data to the user. It should be noted that, Figure 7 Only one memory and processor are shown. In an actual terminal product, the terminal device 3000 may include multiple processors and / or multiple memories.

[0160] Exemplarily, the terminal device 3000 is a mobile phone. When the terminal device 3000 is turned on, the processor 3100 can read the software program in the memory 3200, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 3100 performs baseband processing on the data to be sent and outputs the baseband signal to the radio frequency circuit 3300. The radio frequency circuit 3300 performs radio frequency processing on the baseband signal and then transmits the radio frequency signal to the outside in the form of electromagnetic waves through the antenna 3400. When data is sent to the terminal device 3000, the radio frequency circuit 3300 receives the radio frequency signal through the antenna 3400, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 3100. The processor 3100 converts the baseband signal into data and processes the data.

[0161] In one implementation, the processor 3100 includes a baseband processor and a central processing unit (CPU). The baseband processor is primarily used to process communication protocols and communication data, while the CPU is primarily used to control the entire terminal device 3000, execute software programs, and process data from the software programs. The terminal device 3000 may include multiple baseband processors to accommodate different network standards, and multiple CPUs to enhance its processing capabilities. The various components of the terminal device 3000 may be connected via various buses. The baseband processor may also be referred to as a baseband processing circuit or a baseband processing chip. The CPU may also be referred to as a central processing circuit or a central processing chip. The functionality for processing communication protocols and communication data may be built into the processor or stored in a storage unit as a software program, which is then executed by the processor to implement the baseband processing functionality.

[0162] In one implementation, the processor 3100 and the memory 3200 may be considered as a processing device 3600 of the terminal device 3000. The processing device 3600 may be a chip. For example, the processing device 3600 may be a field programmable gate array (FPGA), a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or other integrated chips.

[0163] In one implementation, the RF circuit 3300 and antenna 3400 can be considered as the transceiver unit 3700 of the terminal device 3000. The transceiver unit 3700 can also be referred to as a transceiver, a transceiver, a transceiver device, etc. Alternatively, the device used to implement the receiving function of the transceiver unit can be referred to as a receiving unit, and the device used to implement the transmitting function of the transceiver unit can be referred to as a transmitting unit. For example, the receiving unit can also be referred to as a receiver, a receiver, a receiving circuit, etc., and the transmitting unit can be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0164] The processing device 3600 can be used to perform the actions implemented within the terminal device described in the previous method embodiments, while the transceiver unit 3700 can be used to perform the actions described in the previous method embodiments, in which the terminal device sends or receives signals to or from the network device. For example, the processing device 3600 determines a first resource, and the transceiver unit 3700 receives the first signal on the first resource. For a detailed description, please refer to the above method embodiments and will not be repeated here.

[0165] It is understood that in the embodiments of the present application, the terminal device and / or the network device may perform some or all of the steps in the embodiments of the present application. These steps or operations are merely examples, and the embodiments of the present application may also perform other operations or variations of various operations. In addition, the various steps may be performed in a different order than those presented in the embodiments of the present application, and it is possible that not all of the operations in the embodiments of the present application need to be performed.

[0166] The present application also provides a computer-readable storage medium, which stores a computer program or instruction. When the computer program or instruction is executed, the method performed by the network device or terminal device in the above-mentioned method embodiment is implemented. In this way, the functions described in the above embodiments can be implemented in the form of software functional units and sold or used as independent products. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory ROM, a random access memory RAM, a magnetic disk, or an optical disk.

[0167] The present application also provides a computer program product, which includes: computer program code, which, when executed on a computer, enables the computer to execute the method executed by the terminal device or network device in any of the aforementioned method embodiments.

[0168] The present application also provides a system, which includes a terminal device and a network device.

[0169] An embodiment of the present application also provides a processing device, including a processor and an interface; the processor is used to execute the method executed by the terminal device or network device involved in any of the above method embodiments.

[0170] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0171] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the division of the units is only a logical functional division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. The mutual coupling, direct coupling, or communication connection shown or discussed can be through some interface, indirect coupling or communication connection of devices or units, and can be electrical, mechanical or other forms.

[0172] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0173] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disc (SSD)).

[0174] It should be understood that references to "embodiments" throughout this specification mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Therefore, various embodiments throughout this specification do not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0175] It should also be understood that the ordinal numbers "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects and are not used to limit the size, content, order, timing, priority, or importance of the multiple objects. For example, the configuration information of the first signal and the configuration information of the second signal can be the same configuration information or different configuration information, and such names do not indicate a difference in the amount of information, content, priority, or importance of the two configuration information.

[0176] It should also be understood that in this application, "when", "if" and "if" all mean that the network element will make corresponding processing under certain objective circumstances, which is not a time limit, and does not require the network element to make judgment actions when implementing it, nor does it mean that there are other limitations.

[0177] It should also be understood that, in this application, "at least one" means one or more, and "plurality" means two or more. "At least one item" or similar expressions refers to one or more items, that is, any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c means: a, b, c, a and b, a and c, b and c, or a, b, and c.

[0178] It should also be understood that expressions similar to "the item includes one or more of the following: A, B, and C" in this application generally mean, unless otherwise specified, that the item can be any one of the following: A; B; C; A and B; A and C; B and C; A, B and C; A and A; A, A and A; A, A and B; A, A and C, A, B and B; A, C and C; B and B, B, B and B, B, B and C, C and C; C, C and C, and other combinations of A, B and C. The above example uses A, B, and C as an example to illustrate the optional items of the item. When the expression is "the item includes at least one of the following: A, B, ..., and X", that is, when the expression contains more elements, the items to which the item can be applied can also be obtained according to the above rules.

[0179] It should also be understood that the term "and / or" in this document simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the related objects are in an "or" relationship. For example, "A / B" means: A or B.

[0180] It should also be understood that in each embodiment of the present application, "A corresponds to B" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean determining B based solely on A, and B can also be determined based on A and / or other information.

[0181] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: include: Mapping a first signal to a first resource, wherein the first signal includes a first physical channel and a first reference signal, the first resource includes a first time domain symbol in the time domain, the first physical channel and the first reference signal are mapped to N subcarriers on the first time domain symbol, any two adjacent subcarriers among the N subcarriers are equally spaced, and an interval between any two adjacent subcarriers among the N subcarriers is a first interval, the first interval is one or two subcarriers, and N is a positive integer greater than 2; The first signal is sent on the first resource.

2. The method according to claim 1, characterized in that After sending the first signal, the method further includes: An echo signal of the first signal is received, wherein the echo signal is used to sense a target.

3. The method according to claim 1 or 2, characterized in that The first resource also includes a second time domain symbol in the time domain, wherein, The first physical channel and the first reference signal are further mapped to M subcarriers on the second time domain symbol, any two adjacent subcarriers in the M subcarriers are equally spaced, and an interval between any two adjacent subcarriers in the M subcarriers is a second interval, and the second interval is equal to the first interval; or The first physical channel is also mapped to M subcarriers on the second time domain symbol, the second time domain symbol does not carry the first reference signal, any two adjacent subcarriers among the M subcarriers are equally spaced, and any two adjacent subcarriers among the M subcarriers are spaced apart by a second interval, and the second interval is equal to the first interval.

4. The method according to claim 1 or 2, characterized in that The first resource further includes a second time domain symbol in the time domain, the first time domain symbol and the second time domain symbol are respectively the nth symbol and the n+kth symbol in the same time slot; or, The first resource further includes a second time domain symbol, a third time domain symbol, and a fourth time domain symbol in the time domain, wherein the first time domain symbol, the second time domain symbol, the third time domain symbol, and the fourth time domain symbol are the nth symbol, the n+1th symbol, the n+kth symbol, and the n+k+1th symbol in the same time slot; Wherein, n and k are positive integers.

5. The method according to claim 4, characterized in that The k is 7.

6. The method according to any one of claims 1-2 and 5, characterized in that: Also includes: sending a second signal on a second resource; The second resource and the first resource are different time domain resources and / or frequency domain resources.

7. The method according to claim 6, characterized in that The second signal includes a second physical channel and a second reference signal, and the first reference signal and the second reference signal are used for demodulation of the second physical channel.

8. The method according to any one of claims 1-2, 5 and 7, characterized in that The first reference signal is used to demodulate the first physical channel, or the first reference signal is used for channel measurement or interference measurement.

9. The method according to any one of claims 1-2, 5 and 7, characterized in that The first physical channel carries downlink control information, broadcast data, multicast data, or unicast data.

10. The method according to any one of claims 1-2, 5 and 7, characterized in that Before sending the first signal on the first resource, the method further includes: Sending configuration information of a first signal; The configuration information includes one or more of the following: time domain resource information of the first signal, frequency domain resource information of the first signal, code domain resource information of the first signal, or port number information of the first signal.

11. A communication method, characterized in that: include: Identify the primary resource; receiving a first signal on the first resource; The first signal includes a first physical channel and a first reference signal, the first resource includes a first time domain symbol in the time domain, the first physical channel and the first reference signal are mapped to N subcarriers on the first time domain symbol, any two adjacent subcarriers among the N subcarriers are equally spaced, and the interval between any two adjacent subcarriers among the N subcarriers is a first interval, the first interval is one or two subcarriers, and N is a positive integer greater than 2.

12. The method according to claim 11, characterized in that The echo signal of the first signal is used to sense the target.

13. The method according to claim 11 or 12, characterized in that The first resource also includes a second time domain symbol in the time domain, wherein, The first physical channel and the first reference signal are further mapped to M subcarriers on the second time domain symbol, any two adjacent subcarriers in the M subcarriers are equally spaced, and an interval between any two adjacent subcarriers in the M subcarriers is a second interval, and the second interval is equal to the first interval; or The first physical channel is also mapped to M subcarriers on the second time domain symbol, the second time domain symbol does not carry the first reference signal, any two adjacent subcarriers among the M subcarriers are equally spaced, and any two adjacent subcarriers among the M subcarriers are spaced apart by a second interval, and the second interval is equal to the first interval.

14. The method according to claim 11 or 12, characterized in that The first resource further includes a second time domain symbol in the time domain, the first time domain symbol and the second time domain symbol are respectively the nth symbol and the n+kth symbol in the same time slot; or, The first resource further includes a second time domain symbol, a third time domain symbol, and a fourth time domain symbol in the time domain, wherein the first time domain symbol, the second time domain symbol, the third time domain symbol, and the fourth time domain symbol are the nth symbol, the n+1th symbol, the n+kth symbol, and the n+k+1th symbol in the same time slot; Wherein, n and k are positive integers.

15. The method according to claim 14, characterized in that The k is 7.

16. The method according to any one of claims 11-12 and 15, characterized in that: Also includes: receiving a second signal on a second resource; The second resource and the first resource are different time domain resources and / or frequency domain resources.

17. The method according to claim 16, characterized in that The second signal includes a second physical channel and a second reference signal, and the first reference signal and the second reference signal are used for demodulation of the second physical channel.

18. The method according to any one of claims 11-12, 15 and 17, characterized in that The first reference signal is used to demodulate the first physical channel, or the first reference signal is used for channel measurement or interference measurement.

19. The method according to any one of claims 11-12, 15 and 17, characterized in that The first physical channel carries downlink control information, broadcast data, multicast data, or unicast data.

20. The method according to any one of claims 11-12, 15 and 17, characterized in that Before determining the first resource, the method further includes: receiving configuration information of a first signal; The configuration information includes one or more of the following: time domain resource information of the first signal, frequency domain resource information of the first signal, code domain resource information of the first signal, or port number information of the first signal.

21. A communication device, characterized in that: The communication device includes a processor and a memory, wherein the memory is used to store computer programs or instructions, and the processor is used to execute the computer programs or instructions in the memory, so that the method according to any one of claims 1 to 10 is performed.

22. A communication device, characterized in that: The communication device includes a processor and a memory, wherein the memory is used to store computer programs or instructions, and the processor is used to execute the computer programs or instructions in the memory, so that the method according to any one of claims 11 to 20 is executed.

23. A computer-readable storage medium, characterized in that A computer program or instructions is stored, wherein the computer program or instructions are used to implement the method according to any one of claims 1 to 10.

24. A computer-readable storage medium, characterized in that A computer program or instructions is stored, wherein the computer program or instructions are used to implement the method according to any one of claims 10 to 20.

25. A computer program product, characterized in that The computer program product comprises: a computer program code, and when the computer program code is executed by a computer, the computer is caused to perform the method according to any one of claims 1 to 10, or the method according to any one of claims 11 to 20.

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