Signal transmission method and device

Abstract

A signal transmission method and apparatus, applied to the technical field of communications, the method comprising: sending a first signal in a first resource, the first signal being used for sensing, or the first signal being used for sensing and communication, the first resource comprising a first time domain resource and a first frequency domain resource; sending the DMRS in a second resource, wherein the second resource comprises a second time domain resource and a second frequency domain resource; wherein the first time domain resource is not overlapped with the second time domain resource, and the first frequency domain resource is not overlapped with the second frequency domain resource. In the embodiment of the invention, the first signal and the DMRS can be used for channel estimation, that is, the first signal for channel estimation is added on the basis of the DMRS, so that the accuracy of channel estimation can be improved, and the communication performance is improved. The first signal can also be used for perception, and therefore perception performance can also be improved.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202410666284.1, filed on May 23, 2024, entitled "A Signal Transmission Method and Apparatus", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of communication technology, and in particular to a signal transmission method and apparatus. Background Technology

[0004] Integrated sensing and communication (ISAC) is a key application scenario for wireless communication systems. ISAC refers to the ability to simultaneously achieve communication and sensing through wireless signals. Communication capability refers to the ability to transmit information, such as signal transmission rate and anti-interference capability. Sensing capability refers to the ability to perceive the surrounding environment, the speed of moving objects, and distances through wireless signals.

[0005] To improve uplink and downlink transmission performance, demodulation reference signals (DMRS) can be used for uplink and downlink equivalent channel estimation. Based on the channel estimation results, the received information is then equalized to eliminate the impact of channel distortion on information transmission. However, DMRS is primarily used for channel estimation in communication links and cannot meet the requirements of ISAC (Interactive Information Channel Coding). Summary of the Invention

[0006] This application provides a signal transmission method and apparatus to improve communication performance.

[0007] Firstly, a first signal transmission method is provided. This method can be executed by a first device, or by a device including the first device, or by a chip system (or chip) or functional module capable of implementing the functions of the first device. For example, the chip system or functional module is disposed in the first device. For example, the first device can be a network device or a terminal device, without limitation.

[0008] Taking the first device as the executing entity as an example, the method includes: transmitting a first signal in a first resource, the first signal being used for sensing, or the first signal being used for sensing and communication, the first resource including a first time domain resource and a first frequency domain resource; transmitting DMRS in a second resource, the second resource including a second time domain resource and a second frequency domain resource; wherein the first time domain resource and the second time domain resource do not overlap, and the first frequency domain resource and the second frequency domain resource do not overlap.

[0009] In this embodiment, for example, both the first signal and DMRS can be used for channel estimation. This is equivalent to adding a first signal for channel estimation on top of DMRS, thereby improving the accuracy of channel estimation and thus enhancing communication performance. The first signal can also be used for sensing; therefore, this embodiment improves both communication and sensing performance. Furthermore, the resources occupied by the first signal and DMRS do not overlap, reducing resource collisions. Also, the fact that the resources occupied by the first signal and DMRS do not overlap allows the first signal and DMRS to "surround" the communication signal, further improving the accuracy of channel estimation.

[0010] In one possible implementation, the first signal is used for sensing and communication, wherein the first signal includes first communication data, and the modulation order corresponding to the first signal is lower than or equal to a first threshold.

[0011] In the embodiments of this application, a lower modulation order is used to obtain the first signal, which can ensure that the first signal is as constant as possible, thus giving the signal better sensing performance.

[0012] In one possible implementation, a communication signal is transmitted from a third resource. The communication signal includes second communication data, and the modulation order of the communication signal is higher than a first threshold.

[0013] In the embodiments of this application, a higher modulation order is used to obtain the communication signal, which can ensure the data transmission rate.

[0014] In one possible implementation, the transmission power of the first signal is greater than the transmission power of the communication signal, and less than or equal to the transmission power of the DMRS.

[0015] In this embodiment of the application, increasing the transmission power of the first signal to a certain extent can improve the accuracy of channel estimation and thus improve communication performance.

[0016] In one possible implementation, the first frequency domain resource includes multiple sub-frequency domain resources, which are distributed at equal intervals in the frequency domain.

[0017] In this embodiment, the first frequency domain resource includes multiple sub-frequency domain resources that are equally spaced in the frequency domain, which is beneficial for obtaining diversity gain in the frequency domain.

[0018] In one possible implementation, the first time-domain resource includes multiple time-domain units, and the frequency domain spacing of the first signal over any two of these time-domain units is 2n or 4n, where n is a positive integer.

[0019] In the embodiments of this application, the frequency hopping distribution of the first signal is beneficial to obtaining diversity gain in the time and frequency domains, and makes the first signal and DMRS surround the communication signal as much as possible, thereby improving the accuracy of channel estimation.

[0020] In one possible implementation, the method further includes: sending first information, which is used to update the frequency domain spacing of adjacent sub-frequency domain resources among a plurality of sub-frequency domain resources.

[0021] In this embodiment, the frequency spacing between two adjacent sub-frequency domain resources among the multiple sub-frequency domain resources occupied by the first signal is flexibly adjustable.

[0022] In one possible implementation, within a resource block, the second frequency domain resource occupies k subcarriers, while the first frequency domain resource occupies less than or equal to 12-k subcarriers.

[0023] In the embodiments of this application, the number of sub-frequency domain resources occupied by the first signal in a resource block is flexibly variable.

[0024] In one possible implementation, the first resource overlaps with the fourth resource, the fourth resource being used to carry the first reference signal, and the method further includes: determining not to transmit the first reference signal, the first reference signal including one or more of the following: a phase tracking reference signal, a channel state information reference signal, or a positioning reference signal.

[0025] In this embodiment of the application, if the resources occupied by the first signal conflict with those occupied by the first reference signal, it can be determined that the first reference signal will not be sent, and the transmission of the first signal will be given priority.

[0026] Secondly, a second signal transmission method is provided, which can be executed by a second device, or by a device including the second device, or by a chip system (or chip) or other functional module capable of implementing the functions of the second device, for example, the chip system or functional module is disposed in the second device. For example, the second device can be a network device or a terminal device, without limitation.

[0027] Taking the second device as the executing entity as an example, the method includes: receiving a first signal in a first resource, the first signal being used for sensing, or the first signal being used for sensing and communication, the first resource including a first time domain resource and a first frequency domain resource; receiving DMRS in a second resource, the second resource including a second time domain resource and a second frequency domain resource; wherein the first time domain resource and the second time domain resource do not overlap, and the first frequency domain resource and the second frequency domain resource do not overlap.

[0028] In one possible implementation, the first signal is used for sensing and communication, wherein the first signal includes first communication data, and the modulation order corresponding to the first signal is lower than or equal to a first threshold.

[0029] In one possible implementation, a third resource receives a communication signal, which includes second communication data, and the modulation order of the communication signal is higher than a first threshold.

[0030] In one possible implementation, the transmission power of the first signal is greater than the transmission power of the communication signal, and less than or equal to the transmission power of the DMRS.

[0031] In one possible implementation, the first frequency domain resource includes multiple sub-frequency domain resources, which are distributed at equal intervals in the frequency domain.

[0032] In one possible implementation, the first time-domain resource includes multiple time-domain units, and the frequency domain spacing of the first signal over any two of these time-domain units is 2n or 4n, where n is a positive integer.

[0033] In one possible implementation, the method further includes: receiving first information, the first information being used to update the frequency domain spacing of adjacent sub-frequency domain resources among a plurality of sub-frequency domain resources.

[0034] In one possible implementation, within a resource block, the second frequency domain resource occupies k subcarriers, while the first frequency domain resource occupies less than or equal to 12-k subcarriers.

[0035] In one possible implementation, the method further includes: performing channel estimation based on the first signal and DMRS.

[0036] Thirdly, this application provides an apparatus that can be used to perform the methods described in the first aspect and any possible implementation thereof. This apparatus may, for example, be a first apparatus.

[0037] In one possible implementation, the device may include a baseband device and a radio frequency device.

[0038] In another possible implementation, the device may include a processing module (sometimes also called a processing unit) and a transceiver module (sometimes also called a transceiver unit). The transceiver module is capable of both sending and receiving functions. When the transceiver module performs the sending function, it may be called a sending module (sometimes also called a sending unit), and when it performs the receiving function, it may be called a receiving module (sometimes also called a receiving unit). The sending module and the receiving module may be the same functional module, referred to as the transceiver module, which performs both sending and receiving functions; alternatively, the sending module and the receiving module may be different functional modules, with "transceiver module" being a collective term for these functional modules.

[0039] Fourthly, this application provides an apparatus that can be used to perform the methods described in the second aspect and any possible implementation thereof. This apparatus may, for example, be a second apparatus.

[0040] In one possible implementation, the device may include a baseband device and a radio frequency device.

[0041] In another possible implementation, the device may include a processing module (sometimes also called a processing unit) and a transceiver module (sometimes also called a transceiver unit). The transceiver module is capable of both sending and receiving functions. When the transceiver module performs the sending function, it may be called a sending module (sometimes also called a sending unit), and when it performs the receiving function, it may be called a receiving module (sometimes also called a receiving unit). The sending module and the receiving module may be the same functional module, referred to as the transceiver module, which performs both sending and receiving functions; alternatively, the sending module and the receiving module may be different functional modules, with "transceiver module" being a collective term for these functional modules.

[0042] Fifthly, this application also provides an apparatus. The apparatus may be a signal transmitting end, or a chip or chip system for use in a signal transmitting end. The apparatus may include one or more processors. Optionally, the apparatus may further include a memory. The memory is used to store one or more computer programs or instructions. The one or more processors are used to execute the one or more computer programs or instructions stored in the memory, so that the apparatus performs the methods described in the first aspect and any possible implementation thereof.

[0043] Sixthly, this application also provides an apparatus. The apparatus may be a signal receiver, or a chip or chip system for use in a signal receiver. The apparatus may include one or more processors. Optionally, the apparatus may further include a memory. The memory is used to store one or more computer programs or instructions. The one or more processors are used to execute the one or more computer programs or instructions stored in the memory, so that the apparatus performs the methods described in the second aspect and any of its possible implementations.

[0044] In a seventh aspect, this application provides a system that may include a first device and / or a second device. The first device may be used to perform the method described in the first aspect and its various possible implementations, and the second device may be used to perform the method described in the second aspect and its various possible implementations. The first device may be implemented, for example, by the device of the third or fifth aspect, and the second device may be implemented, for example, by the device of the fourth or sixth aspect.

[0045] In one possible implementation, the first device is used to transmit a first signal in a first resource, the first signal being used for sensing, or the first signal being used for sensing and communication, the first resource including a first time-domain resource and a first frequency-domain resource; and to transmit DMRS in a second resource, the second resource including a second time-domain resource and a second frequency-domain resource; wherein the first time-domain resource and the second time-domain resource do not overlap, and the first frequency-domain resource and the second frequency-domain resource do not overlap.

[0046] In one possible implementation, the second device is used to receive a first signal in a first resource, the first signal being used for sensing or for sensing and communication, the first resource including a first time-domain resource and a first frequency-domain resource; and to receive a demodulation reference signal DMRS in a second resource, the second resource including a second time-domain resource and a second frequency-domain resource; wherein the first time-domain resource and the second time-domain resource do not overlap, and the first frequency-domain resource and the second frequency-domain resource do not overlap.

[0047] The technical effects that can be achieved by the seventh aspect above and any of its possible implementations can be referred to the technical effects that can be achieved by any of the possible implementations of the first and second aspects above, and will not be repeated here.

[0048] Eighthly, this application also provides a computer-readable storage medium for storing a computer program or instructions that, when executed, cause the methods described in the first or second aspect and any possible implementation thereof to be implemented.

[0049] Ninthly, this application also provides a computer program product comprising a computer program that, when run on a computer, causes the methods described in the first or second aspect and any possible implementation thereof to be implemented.

[0050] The technical effects achievable by the sixth to ninth aspects and any of their possible implementations should be referred to the technical effects achievable by the first or second aspect and any of their possible implementations, and will not be repeated here. Attached Figure Description

[0051] Figure 1A This is a schematic diagram of a single-station sensing mode.

[0052] Figure 1B This is a schematic diagram of a dual-station sensing mode.

[0053] Figures 2A-2D A schematic diagram of the DMRS pattern;

[0054] Figure 3A A schematic diagram of DMRS configuration type 1, single prefix symbol, and additional DMRS pattern;

[0055] Figure 3B A schematic diagram of DMRS configuration type 1, double-prefix symbol, and additional DMRS pattern;

[0056] Figure 4 This is a schematic diagram of a wireless communication system;

[0057] Figures 5A-5F This is a schematic diagram illustrating several sensing scenarios applied in the embodiments of this application;

[0058] Figure 6A and Figure 6B These are schematic diagrams illustrating two application scenarios of embodiments of this application;

[0059] Figure 7 A flowchart illustrating a signal transmission method provided in an embodiment of this application;

[0060] Figure 8A and Figure 8B A schematic diagram of various patterns of configuration type 1, single preamplifier symbol DMRS and first signal provided for embodiments of this application;

[0061] Figures 9A-9D A schematic diagram of various patterns of the first signal of DMRS and frequency hopping distribution of configuration type 1 provided in the embodiments of this application;

[0062] Figures 10A-10CA schematic diagram of various patterns of the first signal of DMRS and frequency hopping distribution of configuration type 2 provided in the embodiments of this application;

[0063] Figures 11A-11C This is a schematic diagram of the distribution of the first signal in the time domain provided in an embodiment of this application;

[0064] Figure 12 This is a schematic diagram comparing the communication performance of the solution in this application embodiment with other solutions;

[0065] Figure 13 A schematic diagram of the structure of an apparatus provided in an embodiment of this application;

[0066] Figure 14 A schematic diagram of another device provided in an embodiment of this application;

[0067] Figure 15 This is a schematic diagram of the structure of another device provided in an embodiment of this application;

[0068] Figure 16 This is a schematic diagram of a pre-DMRS and an additional DMRS;

[0069] Figure 17 A schematic diagram of another pattern of the first signal of the DMRS and frequency hopping distribution of configuration type 1 provided in the embodiments of this application;

[0070] Figure 18 This is a schematic diagram of another pattern of the first signal of the DMRS and frequency hopping distribution of configuration type 2 provided in the embodiments of this application. Detailed Implementation

[0071] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0072] In this application embodiment, the number of nouns, unless otherwise specified, refers to "singular nouns or plural nouns," that is, "one or more." "At least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, or B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the related objects before and after are in an "or" relationship. For example, A / B means: A or B. "At least one of the following" or similar expressions refer to 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 and b and c, where a, b, and c can be single or multiple.

[0073] The ordinal numbers such as "first" and "second" mentioned in the embodiments of this 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 first terminal device and the second terminal device can be the same terminal device or different terminal devices, and such names do not indicate differences in the structure, priority, or importance of the two terminal devices. In addition, the numbering of steps in the various embodiments described in this application is only to distinguish different steps and is not used to limit the order of steps. For example, S701 may occur before S702, or may occur after S702, or may occur simultaneously with S702.

[0074] In this embodiment of the application, the terminal device is a device with wireless transceiver function, which may be a fixed device, a mobile device, a handheld device (e.g., a mobile phone), a wearable device, an in-vehicle device, or a wireless device (e.g., a communication module, a modem, or a chip system, etc.) built into the above devices. The terminal devices are used to connect people, objects, and machines, and can be widely used in various scenarios, including but not limited to the following: sensing scenarios, cellular communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine / machine-type (M2M / MTC) communication, Internet of Things (IoT), virtual reality (VR), augmented reality (AR), industrial control, self-driving, remote medical care, smart grid, smart furniture, smart office, smart wearables, smart transportation, smart city, drones, robots, and terminal devices in indoor commercial scenarios (such as mobile phone screen mirroring, file sharing, and mobile phone to VR glasses). When the terminal equipment is applied to V2X, it can also be called a V2X device, such as a smart car, digital car, unmanned car, driverless car, pilotless car, or automobile, self-driving car, or autonomous car, pure electric vehicle (EV), hybrid electric vehicle (HEV), range-extended electric vehicle (REEV), plug-in hybrid electric vehicle (PHEV), new energy vehicle, or roadside unit (RSU). The terminal equipment can also be a device used in D2D communication, such as an electricity meter or water meter.

[0075] Furthermore, in this embodiment, the terminal device can also be a terminal device in an IoT system. IoT is an important component of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network of human-machine interconnection and object-to-object interconnection.

[0076] The various terminal devices described above, if located in a vehicle (e.g., placed inside or installed inside a vehicle), can all be considered in-vehicle terminal devices, also known as on-board units (OBUs). The terminal device of this application can also be an in-vehicle module, in-vehicle component, in-vehicle chip, or in-vehicle unit built into a vehicle as one or more components or units. The vehicle can implement the methods of this application through the built-in in-vehicle module, in-vehicle component, in-vehicle chip, or in-vehicle unit.

[0077] The terminal equipment may sometimes be referred to as user equipment (UE), terminal, access station, UE station, remote station, wireless communication equipment, or user device, etc.

[0078] In this application embodiment, the device for implementing the terminal device function can be the terminal device itself, or it can be a device capable of supporting the terminal device in implementing the function, such as a chip system. This device can be installed in the terminal device. In the technical solutions provided in this application embodiment, the terminal device is used as an example to describe the technical solutions provided in this application embodiment. Furthermore, for ease of description, the terminal device in this application embodiment is described using a UE as an example.

[0079] The network devices in this application embodiment include, for example, access network devices and / or core network devices. The access network devices are devices with wireless transceiver capabilities, used to communicate with the terminal devices. The access network devices include, but are not limited to, base stations (base transceiver stations (BTS), Node B, evolved Node B (eNodeB) / eNB, or the next generation Node B (gNodeB) / gNB), transmission reception points (TRPs), base stations evolved from the 3rd Generation Partnership Project (3GPP), access nodes in Wi-Fi systems, wireless relay nodes, wireless backhaul nodes, etc. The base stations can be: macro base stations, micro base stations, pico base stations, small cells, relay stations, etc. Multiple base stations can support networks using the same access technology or networks using different access technologies. A base station can contain one or more co-located or non-co-located transmission and reception points. The access network equipment can also be a radio controller, centralized unit (CU), and / or distributed unit (DU) in a cloud radio access network (CRAN) scenario. The access network equipment can also be a server, etc. For example, the network equipment in V2X technology can be a roadside unit (RSU). The following description uses a base station as an example to illustrate the access network equipment. A base station can communicate with a terminal device, or it can communicate with a terminal device through a relay station. A terminal device can communicate with multiple base stations in different access technologies. The core network equipment is used to implement functions such as mobility management, data processing, session management, policy and billing. The names of the equipment implementing core network functions may differ in systems using different access technologies; this application does not limit this. Taking the 5th generation (5G) mobile communication technology system as an example, the core network equipment includes: access and mobility management function (AMF), session management function (SMF), policy control function (PCF) or user plane function (UPF), etc.

[0080] In the CU-DU architecture, access network equipment can include centralized units (CU) and distributed units.

[0081] One or more logical network elements, such as distributed unit (DU), control plane (CP), user plane (UP), or radio unit (RU). CU and DU can be separate entities or included in the same network element, such as a baseband unit (BBU). RU can be included in radio frequency equipment or radio frequency units, such as remote radio unit (RRU), active antenna unit (AAU), or remote radio head (RRH).

[0082] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an ORAN system, CU can also be called an open CU (O-CU), DU can also be called O-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. For ease of description, the embodiments of this application use CU, CU-CP, CU-UP, DU, and RU as examples. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in the embodiments of this application can be implemented through software modules, hardware modules, or a combination of software modules and hardware modules.

[0083] Optionally, in various embodiments of this application, if the access network device is a distributed architecture, for example, the access network device includes CU and DU, or includes CU-CP, CU-UP and DU, then the access network device sends information to the UE, specifically the DU included in the access network device sends information to the UE; the access network device receives information from the UE, specifically the DU included in the access network device receives information from the UE.

[0084] In this application embodiment, the device for implementing the network device function can be a network device itself, or a device capable of supporting the network device in implementing that function, such as a chip system, which can be installed in the network device. In the technical solutions provided in this application embodiment, the example of a network device being used to implement the network device function is used to describe the technical solutions provided in this application embodiment.

[0085] The following explanations of some terms or concepts used in the embodiments of this application are provided to facilitate understanding by those skilled in the art.

[0086] 1. Time-domain resources.

[0087] Time-domain resources include one or more time-domain units. Alternatively, a time-domain unit can be referred to as a time period, etc., without limitation. A time-domain unit can refer to a period of time in the time domain, such as a radio frame, subframe, slot, mini-slot, or time-domain symbol. Among them, a time-domain symbol can be simply referred to as a symbol. A time-domain symbol can be an orthogonal frequency division multiplexing (OFDM) symbol, or an orthogonal frequency division multiplexing (DFT-s-OFDM) symbol based on the discrete Fourier transform spread.

[0088] 2. Frequency domain resources.

[0089] Frequency domain resources include one or more sub-frequency domain resources. These sub-frequency domain resources can also be called frequency domain units. Frequency domain units include, for example, bands, component carriers (CCs), subcarriers, bandwidth parts (BWPs), one or more resource blocks (RBs), RB sets, resource elements (REs), or subchannels. Optionally, a subchannel may include one or more RBs that are continuous or interlaced in the frequency domain. The size of a subchannel can be measured by the number of RBs it includes; for example, a subchannel may include 10, 12, 15, 20, 25, or 50 RBs.

[0090] 3. Perception mode.

[0091] In sensing, based on the different sender and receiver of the signal used for sensing (e.g., the sensing signal), sensing modes can be divided into two types: single-station sensing and dual-station sensing. Single-station sensing mode, also known as self-transmitting and self-receiving mode, refers to a mode where the device transmitting the sensing signal and the device receiving the echo signal reflected from the target are the same device, such as... Figure 1AAs shown, both the device transmitting the sensing signal and the device receiving the echo signal are device 1; the dual-station sensing mode, also known as A-transmit B-receive mode or self-transmit and other-receive mode, refers to a mode where the device transmitting the sensing signal and the device receiving the echo signal reflected from the target are different devices, such as... Figure 1B As shown, the device that sends the sensing signal is device 2, and the device that receives the echo signal is device 3. Figure 1A and Figure 1B All examples use a vehicle as the sensing target (or scattering object). Figure 1A Device 1 in the example is a network device or a UE. Figure 1B Device 2 in the text is, for example, a network device or a UE. Figure 1B Device 3 in the text is, for example, a network device or a UE. Embodiments of this application may use either a single-site sensing mode or a dual-site sensing mode.

[0092] 4. DMRS.

[0093] DMRS can be used for channel estimation, and the estimated channel information can be used for data demodulation. The name of DMRS may vary in different communication systems; this application does not limit the name. For example, any signal that can be used for channel estimation can be used to replace the DMRS in this application. In the time domain, DMRS occupies at least one orthogonal frequency division multiplexing (OFDM) symbol; in the frequency domain, DMRS occupies at least one subcarrier. NR communication systems support two DMRS configuration types: Configuration Type 1 and Configuration Type 2. Configuration types can also be called pattern types or types, etc., without limitation. DMRS may include front-loaded DMRS, or a combination of front-loaded DMRS and additional DMRS. The front-loaded DMRS is located at the front end of the communication signal; typically, the DMRS is transmitted before the communication signal, which can reduce the signal processing delay at the receiving end. For example, a pre-prefix DMRS can occupy one OFDM symbol (called a single pre-prefix DMRS), such as OFDM symbol 2 or OFDM symbol 3 within a time slot (the OFDM symbols within this time slot can start from OFDM symbol 0); or, a pre-prefix DMRS can also occupy two OFDM symbols (called a double pre-prefix DMRS). An additional DMRS can occupy one or more OFDM symbols, typically three or four OFDM symbols. These one or more OFDM symbols are equally spaced, and this spacing is also equal to the time domain spacing between one of the additional DMRS and the pre-prefix DMRS. The one additional DMRS is the DMRS adjacent to the pre-prefix DMRS.

[0094] For example, such as Figure 2A As shown, for a DMRS with configuration type 1 and a single preamble symbol, this DMRS occupies one OFDM symbol and supports a maximum of 4 DMRS ports. The time-frequency resource mapping method (i.e., DMRS pattern) of this DMRS is as follows: Figure 2A As shown. For a DMRS with configuration type 1 and double preamble symbols, this DMRS occupies two OFDM symbols and supports a maximum of 8 DMRS ports. The DMRS diagram is as follows. Figure 2B As shown. For a DMRS with configuration type 2 and a single preamble symbol, this DMRS occupies one OFDM symbol and supports a maximum of 6 DMRS ports. The DMRS diagram is as follows. Figure 2C As shown. For DMRS with configuration type 2 and double preamble symbols, this DMRS occupies two OFDM symbols and supports a maximum of 12 DMRS ports, such as... Figure 2D As shown.

[0095] NR communication systems also support combinations of pre-signal DMRS and supplementary DMRS to accommodate higher mobility speeds. A time slot typically includes one to three sets of supplementary DMRS. A set of supplementary DMRS can be considered a repeat of the pre-signal DMRS; for example, the pattern of each set of supplementary DMRS can be a repetition of the pre-signal DMRS pattern, or the pattern of each set of supplementary DMRS can be the same as the pre-signal DMRS pattern. For example, a time slot containing a single pre-signal DMRS and three sets of supplementary DMRS is equivalent to the single pre-signal DMRS being repeated three times within that time slot. As another example, a time slot containing a double pre-signal DMRS and two sets of supplementary DMRS is equivalent to the double pre-signal DMRS being repeated twice within that time slot. The number of DMRS included in each set of supplementary DMRS can be the same as the number of DMRS included in the pre-signal DMRS. For example, for configuration type 1, single pre-signal DMRS, each set of supplementary DMRS includes 6 DMRS. Additionally, each set of supplementary DMRSs can occupy the same subcarrier as the preceding DMRS. Optionally, for configuration type 1, single preceding symbol DMRS, a maximum of three sets of supplementary DMRSs can be added, such as... Figure 3A As shown; for DMRS with double preamble symbols, a maximum of two additional DMRSs can be added, such as Figure 3B As shown. Figure 3A , 3B The example shown uses configuration type 1 and DMRS port 1. It should be understood that the number of time-domain symbols included in a time slot may vary under normal circumstances; for example, a time slot may include 12 or 14 time-domain symbols. Figure 3A , 3BThe image shows a portion of the time slots, not all of them.

[0096] Optionally, a time slot may also include a set of additional DMRS. For example, for a DMRS with two pre-symbols, a set of additional DMRS can be added, such as... Figure 16 As shown. Figure 16 The example shown is configuration type 1, DMRS port 1. Figure 16 The image shows a portion of the time slots, not all of them.

[0097] in, Figures 2A-2D , Figure 3A , Figure 3B , Figure 16 The DMRS pattern shown is an example and is not a limitation on the DMRS pattern. For example, the DMRS pattern can vary in different communication systems. However, the signal transmission method provided in this application embodiment is still applicable when the DMRS pattern is a different pattern (e.g., configuration type 2 under DMRS port 1 and a DMRS pattern with double preamble symbols, etc.) or when the DMRS pattern changes.

[0098] DMRS can be used for channel estimation in both uplink and downlink communication links. Taking the downlink as an example, network devices can transmit communication signals on configured time-frequency resources and insert DMRS into the time-frequency resources configured for transmitting communication signals, so that the DMRS is transmitted along with the communication signal. Terminal devices can perform channel estimation based on the DMRS, and then perform equalization and other processing on the communication signal based on the channel estimation results to remove the impact of channel distortion on the transmission of the communication signal.

[0099] However, with the emergence of integrated communication and sensing scenarios in 6G, it is necessary to balance the communication and sensing performance of wireless signals. For example, the wireless signals transmitted from the transmitter to the receiver need to meet both sensing and communication requirements. Sensing requirements refer to the receiver's ability to perceive the relative positions of obstacles in the transmitter's surrounding environment, the transmitter's speed, the speed of obstacles, or their distances. Communication requirements refer to the transmitter's ability to transmit communication data to the receiver. Therefore, channel estimation using only DMRS is insufficient to meet the requirements of ISAC (Inter-Information Communication).

[0100] Therefore, in this embodiment, both the first signal and DMRS can be used for channel estimation, which is equivalent to adding a first signal for channel estimation on top of DMRS. This improves the accuracy of channel estimation and thus enhances communication performance. The first signal can also be used for sensing; therefore, this embodiment improves both communication and sensing performance. Furthermore, the resources occupied by the first signal and DMRS do not overlap, reducing resource collisions. Also, the non-overlapping resources of the first signal and DMRS facilitate the arrangement of the first signal and DMRS around the communication signal, further improving the accuracy of channel estimation.

[0101] The technical solutions of this application embodiment can be applied to various communication systems, such as ISAC communication systems, Universal Mobile Telecommunications System (UMTS), Wireless Local Area Network (WLAN), short-range wireless communication systems (such as sidelink, wireless fidelity, Wi-Fi, Bluetooth, etc.), wired networks, vehicle-to-everything (V2X) communication systems, device-to-device (D2D) communication systems, vehicle-to-everything (V2X) communication systems, 4th generation (4G) mobile communication systems (such as Long Term Evolution (LTE) systems), LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, Worldwide Interoperability for Microwave Access (WiMAX) communication systems, 5th generation (5G) mobile communication systems (such as New Radio (NR) systems), and future communication systems (such as 6th generation (6G) systems). The application does not limit the scope to 6G mobile communication systems or other similar communication systems. The embodiments of this application use... Figure 4 The communication system shown is used as an example for description. When the technical solutions of the embodiments of this application are applied to other communication systems, the devices, components, modules, etc. in the embodiments can be replaced with corresponding devices, components, modules in other communication systems without limitation.

[0102] Figure 4This is a schematic diagram of a communication system used in an embodiment of this application. The communication system may include a first device and a second device.

[0103] Among them, the communication system can perform certain functions, such as synchronization, channel estimation, or sensing.

[0104] in, Figure 4 Unless otherwise specified, the term "first device" can refer to the first device itself, a component within the first device (e.g., a processor, chip, or chip system), or a logic module or software capable of implementing all or part of the functions of the first device. The first device can be a network device or a terminal device, without limitation.

[0105] in, Figure 4 Unless otherwise specified, the term "second device" can refer to the second device itself, a component within the second device (e.g., a processor, chip, or chip system), or a logic module or software that performs all or part of the functions of the second device. The second device can be a network device or a terminal device, without limitation.

[0106] In this embodiment, the terminal device may be located within the beam / cell coverage area of ​​the network device, and the network device may provide communication services to the terminal device.

[0107] The following describes several possible scenarios in which the embodiments of this application are applied.

[0108] One possible scenario is a perception scenario, such as Figures 5A-5F As shown. Figures 5A-5F It involves six sensing scenarios, including the scenario where network device A transmits and receives data on its own, such as... Figure 5A As shown; in the scenario where terminal device A transmits and receives data independently, such as... Figure 5B As shown; a scenario where network device A sends a sensing signal and network device B receives the echo signal, such as... Figure 5C As shown; a scenario where terminal device A sends a sensing signal and terminal device B receives the echo signal, such as... Figure 5D As shown; a scenario where network device A sends a sensing signal and terminal device A receives the echo signal, such as... Figure 5E As shown; a scenario where terminal device A sends a sensing signal and network device A receives the echo signal, such as... Figure 5F As shown.

[0109] in, Figures 5A-5F The example given is a vehicle, but this application is not limited to this. For example, the target may also be a pedestrian, a low-altitude drone, or other moving or stationary objects. Figures 5A-5FTaking a smartphone as an example, the embodiments of this application are not limited to this. Furthermore, Figures 5A-5F The six perception scenarios provided in the document correspond to the perception modes and Figure 1A , Figure 1B The single-station sensing mode or dual-station sensing mode indicated corresponds to respectively. For example, Figure 5A and 5B It belongs to the single-station sensing mode. Figures 5C-5F It belongs to the dual-station sensing mode.

[0110] One possible communication scenario could be wireless communication systems such as cellular communication, etc. Figure 6A As shown. Network equipment can be a base station, and one base station can serve multiple terminal devices, such as... Figure 6A As shown in (a) above; a terminal device can communicate with multiple base stations, such as Figure 6A As shown in (b) of the diagram.

[0111] One possible communication scenario could be wireless communication systems such as wireless local area networks (WLANs). Figure 6B As shown. A network device can be an access point (AP), and one AP can serve multiple terminal devices, such as... Figure 6B As shown in (a) above; a terminal device can communicate with multiple APs, such as Figure 6B As shown in (b) of the diagram.

[0112] The communication system described in this application is intended to more clearly illustrate the technical solutions of this application and does not constitute a limitation on the technical solutions provided in this application. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in this application are also applicable to similar technical problems.

[0113] The embodiments of this application will now be described in conjunction with the accompanying drawings. The various embodiments of this application can be applied to... Figure 4 , Figures 5A to 5F , Figure 6A or Figure 6B The network architecture shown. For example, the first device involved in various embodiments of this application may be... Figure 4 The first device in the present application, and the second device involved in the various embodiments of this application may be... Figure 4 The second device in the embodiment; or, the first device involved in the various embodiments of this application may be Figure 5A In the network device A, the second device involved in the various embodiments of this application may be... Figure 5A Network device A in the above; or, the first device involved in the various embodiments of this application may be network device A; Figure 5B Terminal device A in the application, the second device involved in the various embodiments of this application may be... Figure 5BTerminal device A in the application; or, the first device involved in the various embodiments of this application may be... Figure 5C In the network device A, the second device involved in the various embodiments of this application may be... Figure 5C Network device B in the application; or, the first device involved in the various embodiments of this application may be network device B. Figure 5D Terminal device A in the application, the second device involved in the various embodiments of this application may be... Figure 5D Terminal device B in the application; or, the first device involved in the various embodiments of this application may be... Figure 5E In the network device A, the second device involved in the various embodiments of this application may be... Figure 5E Terminal device A in the application; or, the first device involved in the various embodiments of this application may be... Figure 5F Terminal device A in the application, the second device involved in the various embodiments of this application may be... Figure 5F Network device A in the above; or, the first device involved in the various embodiments of this application may be network device A; Figure 6A In a base station, the second device involved in the various embodiments of this application may be a base station. Figure 6A A terminal device in the system, for example, is covered by the base station; or, the first device involved in the various embodiments of this application may be... Figure 6A In a terminal device, the second device involved in the various embodiments of this application may be a terminal device. Figure 6A The terminal device is covered by a base station, for example, the base station; or, the first device involved in the various embodiments of this application may be... Figure 6A In a terminal device, the second device involved in the various embodiments of this application may be a terminal device. Figure 6A Another terminal device in the process; or, the first device involved in the various embodiments of this application may be another terminal device; Figure 6B In a certain AP, the second device involved in the various embodiments of this application may be... Figure 6B A terminal device in the application, for example, is covered by the access point (AP); or, the first device involved in the various embodiments of this application may be... Figure 6B In a terminal device, the second device involved in the various embodiments of this application may be a terminal device. Figure 6B The terminal device is covered by an access point (AP) in the network; or, the first device involved in the various embodiments of this application may be... Figure 6B In a terminal device, the second device involved in the various embodiments of this application may be a terminal device. Figure 6B Another terminal device in the process.

[0114] like Figure 7 The diagram shown is a flowchart of a signal transmission method provided in an embodiment of this application.

[0115] S701, the first device sends a first signal at the first resource, and correspondingly, the second device receives the first signal at the first resource.

[0116] The first resource includes a first time-domain resource and a first frequency-domain resource. The first signal can be used for sensing, or the first signal can be used for both sensing and communication. The first signal can also be called a sensing signal or a sensing reference signal (SeRS), etc., and the name is not limited. Wherein, "the first signal is used for sensing" can be understood as the first signal being used for sensing and not for communication; for example, the first signal is a signal used for sensing or a signal dedicated to sensing. Wherein, "the first signal is not used for communication" as described in the embodiments of this application can be understood as the first signal not including communication data. For example, even if the first signal is not used for communication (e.g., does not include communication data), the first signal can still be used for channel estimation.

[0117] The first signal can be used for both sensing and communication. This can be understood as the first signal being used for both sensing and communication.

[0118] Optionally, the first signal can be a phase modulation symbol, for example, the first signal implemented in the form of a sequence. In one example, the phase modulation symbol can be a symbol generated based on binary sequence modulation, which can include one or more of the following: a Golden sequence, an m-sequence, or a Golay sequence. In another example, the phase modulation symbol can be a symbol generated based on a ZC (Zadoff-Chu) sequence. For example, the sequence of the first signal is a ZC sequence; or, the sequence of the first signal is a sequence obtained by truncating a ZC sequence; or, the sequence of the first signal is a sequence obtained by cyclically expanding a ZC sequence. For example, if the first signal is used for sensing, or the first signal is used for sensing but not for communication, then the first signal can be a phase modulation symbol.

[0119] Alternatively, the first signal can be a data signal. In this case, the modulation order corresponding to the first signal can be lower than or equal to the first threshold. If the modulation order of the first signal is too high, the first signal may have poor performance when used for sensing. Therefore, in order to obtain better sensing performance, the modulation order corresponding to the first signal can be lower than or equal to the first threshold. For example, the first threshold is the modulation order corresponding to quadrature amplitude modulation (QAM) of 256, and the modulation method corresponding to the first signal is, for example, phase-shift keying (PSK), binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), 64QAM, or 16QAM. For another example, if the first threshold is the modulation order corresponding to 64QAM, the modulation method corresponding to the first signal is, for example, PSK, BPSK, QPSK, or 16QAM. For example, if the first threshold is the modulation order corresponding to 16QAM, then the modulation scheme corresponding to the first signal can be, for example, PSK, BPSK, or QPSK. Alternatively, the first threshold can be a modulation order lower than that corresponding to 16QAM, such as the modulation order corresponding to QPSK; or, the first threshold can be a modulation order higher than that corresponding to 256QAM. This application does not limit this, as long as the first threshold enables the first signal to have good sensing performance. For example, if the modulation scheme corresponding to the first signal is QPSK, the advantage of choosing QPSK is that the constellation points corresponding to QPSK are constant modulus, resulting in a signal modulated by QPSK (e.g., the first signal) having superior sensing performance. For instance, if the first signal is used for both sensing and communication, then the first signal can be a data signal. This data signal can achieve both sensing and communication data (i.e., achieve communication function). For example, the first signal may include first communication data.

[0120] Alternatively, the first signal can be implemented in other ways, and there are no restrictions on this.

[0121] As an optional implementation, the first device may also transmit a communication signal on a third resource. This communication signal may include, for example, second communication data, and the modulation order corresponding to this communication signal (or the second communication data) may be higher than a first threshold. Optionally, the second communication data may be associated with the first signal and / or DMRS (described later). For example, the second communication data may be demodulated based on the channel estimation results of the first signal and / or DMRS. The fact that the modulation order corresponding to the second communication data is higher than the first threshold indicates that the second communication data can be modulated using a modulation scheme corresponding to a higher modulation order, thereby improving the reliability of the second communication data. For example, the communication data transmitted by the first device may primarily consist of the second communication data, thus ensuring the data transmission rate; the first signal transmitted by the first device may be used for auxiliary communication to improve communication performance.

[0122] If the embodiments of this application adopt a single-station sensing mode, after the first device sends the first signal, it can also receive the signal after the first signal has been reflected, scattered, or diffracted by a sensing target (or scatterer) in the environment. This signal is called an echo signal, or it may have other names. The sensing target can be any tangible object in the environment capable of reflecting electromagnetic waves, such as stationary objects like mountains, forests, or buildings, or it can be a mobile object such as a vehicle, drone, pedestrian, or terminal device; there is no limitation. Upon receiving the echo signal, the first device can measure it to obtain corresponding parameters, such as Doppler, time delay, and distance information corresponding to the sensing target. Furthermore, if the first signal includes communication data, the second device can also receive the first signal. The first signal received by the second device can be a signal directly delivered from the first device without passing through a scatterer, and the second device can obtain the communication data from the received first signal. Optionally, if the first device also sends a communication signal to a third resource, the second device can receive the communication signal at the third resource.

[0123] Alternatively, if this embodiment employs a dual-station sensing mode, after the first device sends a first signal, the second device can receive the echo signal after the first signal has been reflected, scattered, or diffracted by a sensing target (or scatterer) in the environment. Upon receiving the echo signal, the second device can perform sensing measurements to obtain corresponding parameters, such as Doppler, time delay, and distance information corresponding to the sensing target. Furthermore, if the first signal includes communication data, the second device can also receive the first signal directly transmitted from the first device, which has not passed through a scatterer; the second device can obtain the communication data from the received first signal. Optionally, if the first device also sends a communication signal to a third resource, the second device can receive that communication signal at the third resource.

[0124] S702, the first device transmits DMRS in the second resource, and correspondingly, the second device receives DMRS in the second resource.

[0125] Optionally, S701 can occur before S702, or S701 can occur after S702, or S701 and S702 can occur simultaneously.

[0126] In this embodiment, the first time-domain resources and the second time-domain resources do not overlap, nor do the first frequency-domain resources and the second frequency-domain resources. This reduces resource collisions and allows the first signal and DMRS to "surround" the communication signal (e.g., communication data) as much as possible, improving the accuracy of channel estimation.

[0127] Optionally, taking a frequency domain unit or sub-frequency domain resource as an example, if within a resource block, the second frequency domain resource occupies or includes k subcarriers, and the first and second frequency domain resources do not overlap, then the number of subcarriers occupied or included by the first frequency domain resource is less than or equal to 12-k subcarriers. That is, within a resource block, the first frequency domain resource can occupy part or all of the subcarriers excluding those occupied by the DMRS. For example, if the DMRS occupies 6 subcarriers within a resource block, then the first frequency domain resource can occupy part or all of the remaining 6 subcarriers within that resource block. For instance, the number of subcarriers occupied by the first frequency domain resource can be equal to 12-k subcarriers, meaning the first frequency domain resource can occupy more subcarriers, which can improve the accuracy of channel estimation. Alternatively, the number of subcarriers occupied by the first frequency domain resource can be less than 12-k subcarriers, meaning the first frequency domain resource can occupy fewer subcarriers, which can save resource overhead on the first signal.

[0128] For example, for configuration type 1 and DMRS port 1 (see...) Figure 2A (Or 2B) The second frequency domain resource occupies 6 subcarriers, namely: subcarrier 0, subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8, and subcarrier 10. The first and second frequency domain resources do not overlap, so the first frequency domain resource can occupy some or all of the subcarriers 1, 3, 5, 7, 9, or 11, excluding these 6 subcarriers. For example, please refer to... Figure 8A Taking the first frequency domain resource occupies subcarriers 1, 3, 5, 7, 9, and 11 as an example. For another example, please refer to... Figure 8B Taking the first frequency domain resource occupancy of subcarrier 1, subcarrier 3, subcarrier 7 and subcarrier 9 as an example.

[0129] Optionally, the first frequency domain resource includes multiple sub-frequency domain resources, which can be distributed at equal intervals or unequal intervals in the frequency domain. Distributing these multiple sub-frequency domain resources at equal intervals in the frequency domain can help improve diversity gain.

[0130] Following the example above, for configuration type 1 and DMRS port 1 (please refer to...) Figure 2A (Or 2B) If the second frequency domain resource occupies 6 subcarriers: subcarrier 0, subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8, and subcarrier 10, then the first frequency domain resource can occupy some or all of the subcarriers 1, 3, 5, 7, 9, or 11, excluding these 6 subcarriers. Furthermore, the subcarriers occupied by the first frequency domain resource can be equally spaced in the frequency domain. For example, the first frequency domain resource can occupy subcarriers 1, 3, 5, 7, 9, and 11. Or, for another example, the first frequency domain resource can occupy subcarriers 1, 5, and 9, and so on.

[0131] In one optional implementation, the first time-domain resource includes multiple time-domain units, and the frequency domain spacing between any two time-domain units of the first signal is 2^n sub-frequency domain resources, where n is a positive integer. Taking sub-frequency domain resources as subcarriers as an example, for DMRS configuration type 1, the frequency domain spacing of the subcarriers occupied by the DMRS is 2 subcarriers. The frequency domain spacing between any two subcarriers included in the first frequency domain resource of the first signal can be 2^n subcarriers, and any subcarriers included in the first frequency domain resource are different from the subcarriers occupied by the DMRS. Thus, the first frequency domain resource has a frequency-hopping distribution in the frequency domain, which is beneficial for obtaining diversity gain. For example, refer to... Figure 9A For DMRS port 1 with configuration type 1, the DMRS occupies six subcarriers: subcarrier 0, subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8, and subcarrier 10. Taking the first signal occupying subcarriers 1, 3, 5, 7, 9, and 11 as an example, and assuming that the first frequency domain resources do not overlap with the second frequency domain resources, and the first time domain resources do not overlap with the second time domain resources, it can be seen that the first signal in any two time domain units (e.g., for...) Figure 9A The frequency domain spacing on the time domain symbol (in the time domain) can be 2n subcarriers.

[0132] For example, please refer to Figure 9BFor configuration type 1, single-prefix DMRS, the DMRS occupies six subcarriers: subcarrier 0, subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8, and subcarrier 10. Taking the first signal occupying subcarriers 3, 7, and 11 as an example, and assuming that the first frequency domain resources do not overlap with the second frequency domain resources, and the first time domain resources do not overlap with the second time domain resources, it can be seen that the first signal in any two time domain units (e.g., for...) Figure 9B The frequency domain spacing on the time domain symbol (in the time domain) can be 2n subcarriers.

[0133] Figure 9A and Figure 9B These examples all assume there is no additional DMRS. For another example, please refer to... Figure 9C This refers to configuration type 1, a single preamble symbol DMRS, and the case of 3 additional DMRS. The DMRS occupies 6 subcarriers: subcarrier 0, subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8, and subcarrier 10. Taking the first signal occupying subcarriers 1, 3, 5, 7, 9, and 11 as an example, and assuming that the first frequency domain resources do not overlap with the second frequency domain resources, and the first time domain resources do not overlap with the second time domain resources, it can be seen that the first signal in any two time domain units (e.g., for...) Figure 9C The frequency domain spacing over the time domain symbols (in the example) can be 2n subcarriers. For example, in... Figure 9C In this context, the first signal has a frequency domain spacing of two subcarriers in the first and second time domain units. Additionally, in the third time domain unit between the first and second time domain units, there exists an additional DMRS. Figure 9C The blank boxes in the diagram represent, for example, communication signals. The solution provided by this application allows the first signal and DMRS to be positioned as close as possible to the communication signal, improving the accuracy of channel estimation.

[0134] For example, please refer to Figure 9D This is a configuration type 1, double-prefixed symbol DMRS, with two sets of additional DMRS. The DMRS occupies six subcarriers: subcarrier 0, subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8, and subcarrier 10. Taking the first signal occupying subcarriers 5, 7, 9, and 11 as an example, and assuming that the first frequency domain resources do not overlap with the second frequency domain resources, and the first time domain resources do not overlap with the second time domain resources, it can be seen that the first signal in any two time domain units (e.g., for...) Figure 9D The frequency domain spacing over the time domain symbols (in the example) can be 2n subcarriers. For example Figure 9DIn this embodiment, the first signal has a frequency domain spacing of two subcarriers in the first and second time domain units. Additionally, in the third and fourth time domain units between the first and second time domain units, there is a set of additional two-symbol DMRS. The scheme of this application allows the first signal and DMRS to be positioned as close as possible to the communication signal, improving the accuracy of channel estimation.

[0135] For example, please refer to Figure 17 This refers to configuration type 2, dual-prefix DMRS, and the presence of an additional DMRS. The DMRS occupies six subcarriers: subcarrier 0, subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8, and subcarrier 10. Taking the first signal occupying subcarriers 1, 3, 5, 7, 9, and 11 as an example, and assuming that the first frequency domain resources do not overlap with the second frequency domain resources, and the first time domain resources do not overlap with the second time domain resources, it can be seen that the first signal in any two time domain units (e.g., for...) Figure 17 The frequency domain spacing over the time domain symbols (in the example) can be 2n subcarriers. For example Figure 17 In this embodiment, the first signal has a frequency domain spacing of two subcarriers in the first and second time domain units. Additionally, in the third and fourth time domain units adjacent to the first and second time domain units, there is an additional set of two-symbol DMRS. The scheme of this application allows the first signal and DMRS to be positioned as close as possible to the communication signal, improving the accuracy of channel estimation.

[0136] In one optional implementation, the first time-domain resource includes multiple time-domain units, and the frequency domain spacing between any two time-domain units of the first signal is 4n sub-frequency domain resources, where n is a positive integer. Taking sub-frequency domain resources as subcarriers as an example, for example, in DMRS configuration type 2, the frequency domain spacing of the subcarriers occupied by the DMRS is 4 subcarriers, and the frequency domain spacing between any two subcarriers included in the first frequency domain resource of the first signal can be 4n subcarriers. The subcarriers included in the first frequency domain resource are different from the subcarriers occupied by the DMRS. Therefore, the first frequency domain resource has a frequency-hopping distribution in the frequency domain, which is beneficial for obtaining diversity gain. For example, refer to... Figure 10A As shown, for configuration type 2 and DMRS port 1, the four subcarriers occupied by DMRS are: subcarrier 0, subcarrier 1, subcarrier 6, and subcarrier 7. Taking the first signal occupying subcarrier 4 and subcarrier 8 as an example, and assuming that the first frequency domain resources do not overlap with the second frequency domain resources, and the first time domain resources do not overlap with the second time domain resources, it can be seen that the first signal in any two time domain units (e.g., for...) Figure 10A The frequency domain spacing on the time domain symbol (in the time domain) can be 4n subcarriers.

[0137] Figure 10ALet's take the case where there is no additional DMRS as an example. For another example, please refer to... Figure 10B This refers to configuration type 2, a single preamble symbol DMRS, and the case of three additional DMRS sets. The DMRS occupies four subcarriers: subcarrier 0, subcarrier 1, subcarrier 6, and subcarrier 7. Taking the first signal occupying subcarrier 4 and subcarrier 8 as an example, and assuming that the first frequency domain resources do not overlap with the second frequency domain resources, and the first time domain resources do not overlap with the second time domain resources, it can be seen that the first signal in any two time domain units (e.g., for...) Figure 10B The frequency domain spacing (on the time domain symbols) can be 4n subcarriers. For example, in... Figure 10B In this process, the frequency domain spacing of the first signal in the first time domain unit and the second time domain unit is 4 subcarriers. In addition, there is an additional DMRS in the third time domain unit between the first time domain unit and the second time domain unit. Figure 10B The blank boxes in the diagram represent, for example, communication signals. The solution provided by this application allows the first signal and DMRS to be positioned as close as possible to the communication signal, improving the accuracy of channel estimation.

[0138] For example, please refer to Figure 10C This refers to configuration type 2, dual-prefix DMRS, and the presence of two sets of additional DMRS. The DMRS occupies four subcarriers: subcarrier 0, subcarrier 1, subcarrier 6, and subcarrier 7. The frequency domain spacing of the first signal in any two time domain units is four subcarriers. Taking the first signal occupying subcarriers 4 and 8 as an example, and assuming that the first frequency domain resources do not overlap with the second frequency domain resources, and the first time domain resources do not overlap with the second time domain resources, it can be seen that the first signal in any two time domain units (e.g., in...) Figure 10C The frequency domain spacing (on the time domain symbols) can be 4n subcarriers. For example, in... Figure 10C In the first signal, the frequency domain spacing in the first time domain unit and the second time domain unit is 4 subcarriers. In the third time domain unit and the fourth time domain unit between the first time domain unit and the second time domain unit, there is an additional DMRS. Figure 10C The blank boxes in the diagram represent, for example, communication signals. The solution provided by this application allows the first signal and DMRS to be positioned as close as possible to the communication signal, improving the accuracy of channel estimation.

[0139] For example, please refer to Figure 18This refers to configuration type 2, dual-prefix DMRS, and the presence of an additional DMRS. The DMRS occupies four subcarriers: subcarrier 0, subcarrier 1, subcarrier 6, and subcarrier 7. The frequency domain spacing of the first signal in any two time domain units is 4 subcarriers. Taking the first signal occupying subcarriers 4 and 8 as an example, and assuming that the first frequency domain resources do not overlap with the second frequency domain resources, and the first time domain resources do not overlap with the second time domain resources, it can be seen that the first signal in any two time domain units (e.g., in...) Figure 18 The frequency domain spacing (on the time domain symbols) can be 4n subcarriers. For example, in... Figure 18 In the first signal, the frequency domain spacing in the first and second time domain units is 4 subcarriers, and in the third and fourth time domain units, there is an additional DMRS. Figure 18 The blank boxes in the diagram represent, for example, communication signals. The solution provided by this application allows the first signal and DMRS to be positioned as close as possible to the communication signal, improving the accuracy of channel estimation.

[0140] In one optional implementation, regardless of whether the multiple sub-frequency domain resources included in the first frequency domain resource are equally or unequally spaced in the frequency domain, the frequency domain spacing of adjacent sub-frequency domain resources among the multiple sub-frequency domain resources included in the first frequency domain resource can be adjusted. For example, the first device can send first information, which can be used to update the frequency domain spacing of the adjacent sub-frequency domain resources. When the first device and the second device begin communication, the frequency domain spacing can be a default or pre-configured value, and during the communication between the first device and the second device, the frequency domain spacing can be adjusted. For example, for type 1 DMRS, the initial frequency domain spacing of the first frequency domain resource is 2 subcarriers, which can be the default; during the communication between the first device and the second device, the first device can use the first information to instruct the frequency domain spacing to be adjusted to 4 subcarriers. As another example, for type 2 DMRS, the initial frequency domain spacing of the first frequency domain resource is 4 subcarriers, which can be the default; during the communication between the first device and the second device, the first device can use the first information to instruct the frequency domain spacing to be adjusted to 8 subcarriers. In the example above, the first frequency domain resource includes multiple sub-frequency domain resources that are equally spaced. If the multiple sub-frequency domain resources are not equally spaced, the first information can indicate one or more frequency domain intervals.

[0141] Alternatively, the frequency domain spacing can be indicated by the first device when the first device and the second device begin communication, and can also be adjusted during the communication process between the first device and the second device. For example, for type 1 DMRS, when the first device and the second device initially communicate, the first device indicates that the frequency domain spacing is 2 subcarriers through first information; during the communication process between the first device and the second device, the first device can adjust the frequency domain spacing to 4 subcarriers through another first information indication.

[0142] For example, the first information may be included in higher-layer signaling or physical-layer signaling, such as radio resource control (RRC) signaling or media access control (MAC) control element (CE). The first information may be sent via broadcast, multicast, or unicast, and this application embodiment does not limit this.

[0143] Optionally, for example, if the second time-domain resource occupies or includes p time-domain units in a sub-frequency domain unit, and the first and second time-domain resources do not overlap, then the number of time-domain units occupied or included by the first time-domain resource in the sub-frequency domain unit is less than or equal to zp time-domain units, where zp time-domain units can be continuous or discontinuous in the time domain. Taking a time-domain unit as a time-domain symbol as an example, z is, for example, the total number of time-domain symbols included in a time slot; or, taking a time-domain unit as a time slot as an example, z is, for example, the total number of time slots included in a subframe, and so on. z can be the total number of time-domain units included in a time unit that includes time-domain units, or a "time-domain unit" can be called a "sub-time unit". z and p are positive integers, and p is less than or equal to z. This can be understood as, within a time unit, the first time-domain resource can occupy some or all of the time-domain units in a sub-frequency domain unit, excluding the time-domain units occupied by DMRS. Taking a time unit as a time slot and a time domain unit as a time domain symbol as an example, and taking a time slot as having 14 time domain symbols as an example, if the number of time domain units occupied by DMRS in a sub-frequency domain unit within a time unit is 1, then the first time domain resource can occupy part or all of the remaining 13 time domain symbols in that time unit, and the time domain symbols occupied by the first time domain resource can be continuous or discontinuous in the time domain.

[0144] Optionally, the number of time domain units occupied or included by the first time domain resource in different sub-frequency domain units may be the same or different; the time domain positions of the time domain units occupied or included by the first time domain resource in different sub-frequency domain units may be the same or different. In one sub-frequency domain unit, the time domain units included or occupied by the first time domain resource are different from those included or occupied by the second time domain resource; and / or, in different sub-frequency domain units, the time domain units included or occupied by the first time domain resource are different from those included or occupied by the second time domain resource.

[0145] For example, for Figure 8A The configuration type 1 shown is a single-prefix DMRS. The second time-domain resource occupies one time-domain unit, and the first and second time-domain resources do not overlap. Therefore, the first time-domain resource can occupy part or all of the other time-domain units besides this one unit. For example... Figure 11A As shown, taking a time unit as a time slot and a time domain unit as a time domain symbol as an example, the first time domain resource can include three discrete time domain symbols. Alternatively, as... Figure 11B As shown, the first time-domain resource may include all time-domain symbols within the time slot that do not overlap with the second time-domain resource.

[0146] For example, for Figure 9C The configuration type 1 shown, DMRS with a single pre-symbol, and the case with 3 sets of additional DMRS, taking the time unit as a time slot and the time domain unit as a time domain symbol as an example, the second time domain resource occupies 4 time domain symbols, the first time domain resource and the second time domain resource do not overlap, and the case where the first time domain resource occupies time domain units can be as follows. Figure 11C As shown. In Figure 11C In this context, the number of time-domain symbols occupied by the first time-domain resource on different subcarriers can be different, as long as the first time-domain resource does not overlap with the second time-domain resource. There are no restrictions on the location and / or quantity of the first time-domain resource.

[0147] Among them, the aforementioned Figure 8A , Figure 8B , Figures 9A-9D , Figures 10A-10C ,as well as Figures 11A-11C This example uses a time slot as the time unit and a time domain symbol as the time domain unit, with one time slot comprising 12 time domain symbols. The implementation method remains similar if the number of time domain symbols in a time slot changes, for example, if one time slot comprises 14 time domain symbols.

[0148] In one optional implementation, the transmission power of the first signal can be greater than the transmission power of the communication signal (e.g., the communication signal transmitted by the first device through the third resource as described in S801). This can be understood as the first device amplifying or increasing the transmission power of the first signal. Since the first signal can be used for channel estimation, a certain degree of power boosting of the first signal can improve the accuracy of channel estimation.

[0149] Alternatively, the transmission power of the DMRS can be greater than the transmission power of the communication signal. That is, the DMRS can also be boosted to a certain extent to improve the accuracy of channel estimation. In one optional approach, the transmission power of the first signal (e.g., the boosted transmission power of the first signal) can be less than or equal to the transmission power of the DMRS (e.g., the boosted transmission power of the DMRS). For example, if the initially determined transmission power of the first signal is the same as the initially determined transmission power of the DMRS, and the maximum amplification value of the DMRS transmission power is typically 3 dB, then when amplifying the power of the first signal, the amplification value of the first signal transmission power can be less than or equal to the maximum amplification value of the DMRS transmission power, for example, less than or equal to 3 dB, ultimately making the transmission power of the first signal less than or equal to the transmission power of the DMRS. Optionally, if the initially determined transmission power of the first signal is different from the initially determined transmission power of the DMRS, the amplification value of the first signal transmission power can be determined as appropriate, aiming to make the final determined transmission power of the first signal less than or equal to the transmission power of the DMRS. The solution implemented in this application can improve the transmission power of the first signal to a certain extent, thereby improving the accuracy of channel estimation and enhancing communication performance.

[0150] In one embodiment, the first device may transmit other reference signals in addition to transmitting the first signal and DMRS. For example, the first device may also transmit the first reference signal. The first reference signal may include one or more of the following: a phase tracking reference signal (PTRS), a channel state information-reference signal (CSI-RS), or a positioning reference signal (PRS), etc. The first reference signal is transmitted, for example, on a fourth resource. The first resource used to transmit the first signal may not overlap with the fourth resource, or it may overlap (e.g., partially or completely). For example, when the first reference signal is PTRS, since PTRS can also be transmitted with the communication signal, the first signal may partially or completely overlap with the first reference signal. For example, the fourth resource includes a third time-domain resource and a third frequency-domain resource. The overlap between the first resource and the fourth resource may include partial or complete overlap between the third time-domain resource and the first time-domain resource, and / or partial or complete overlap between the third frequency-domain resource and the first frequency-domain resource. Optionally, if the first resource overlaps with the fourth resource, the first device may not transmit the first reference signal. For example, the first device may discard the first reference signal to reduce interference between signals and prioritize the transmission of the first signal, thereby improving sensing and communication performance. Alternatively, if the first resource and the fourth resource completely overlap, the first device may not transmit the first reference signal. If the first resource and the fourth resource partially overlap, the first device may not transmit the portion of the first reference signal carried on the overlapping resources. However, the first device may still transmit the portion of the first reference signal not carried on the overlapping resources, thereby improving both sensing and communication performance and the transmission success rate of the first reference signal.

[0151] S703, the second device performs channel estimation based on the first signal and DMRS.

[0152] The second device receives the DMRS and the first signal, and can perform channel estimation based on the first signal and the DMRS. By adding the first signal for channel estimation, the accuracy of the channel estimation can be improved. The second device then equalizes the received information based on the channel estimation results from the DMRS and the first signal, eliminating the impact of channel distortion on information transmission.

[0153] Furthermore, if the embodiments of this application employ a dual-station sensing mode, the second device can also receive the echo signal of the first signal. The second device can perform sensing based on the first signal and the echo signal to obtain corresponding parameters, such as Doppler, time delay, and distance information corresponding to the sensed target. Alternatively, if the embodiments of this application employ a single-station sensing mode, the first device can also receive the echo signal of the first signal. The first device can perform sensing based on the first signal and the echo signal to obtain corresponding parameters, such as Doppler, time delay, and distance information corresponding to the sensed target.

[0154] Figure 12 This diagram illustrates a comparison of the communication performance of the scheme in this application with other schemes. The first signal is represented by SeRS, the horizontal axis represents the signal-to-noise ratio (SNR) in decibels (dB), and the vertical axis represents the block error rate (BLER). Figure 12 As shown, the SeRS pattern relies on the DMRS design (e.g., SeRS and DMRS occupy the same subcarriers, or SeRS and DMRS occupy different subcarriers) to improve communication performance. According to... Figure 12 It is known that if SeRS and DMRS occupy different subcarriers, a lower block error rate (BLER) will be achieved with the same SNR. Therefore, better communication performance can be obtained when SeRS and DMRS occupy different subcarriers. Thus, in this embodiment, the frequency domain resources of SeRS and DMRS are different. Figure 12 In this context, the NR baseline refers to the block error rate in the case where DMRS exists but SeRS does not.

[0155] In this embodiment, for example, both the first signal and DMRS can be used for channel estimation. This is equivalent to adding a first signal for channel estimation on top of DMRS, thereby improving the accuracy of channel estimation and thus enhancing communication performance. The first signal can also be used for sensing; therefore, this embodiment improves both communication and sensing performance. Furthermore, the resources occupied by the first signal and DMRS do not overlap, reducing resource collisions. Also, the fact that the resources occupied by the first signal and DMRS do not overlap allows the first signal and DMRS to "surround" the communication signal, improving the accuracy of channel estimation.

[0156] The embodiments provided in this application describe the methods from the perspective of interaction between multiple communication devices (e.g., a first device and a second device). The steps performed by the communication devices (e.g., the first device or the second device) can be implemented by different functional entities that make up the communication devices. The communication devices (e.g., the first device or the second device) may include hardware structures and / or software modules, implementing the aforementioned functions in the form of hardware structures, software modules, or a combination of hardware structures and software modules. Whether a particular function is implemented in the form of hardware structures, software modules, or a combination of hardware structures and software modules depends on the specific application and design constraints of the technical solution.

[0157] The communication device used to implement the above method in the embodiments of this application is described below with reference to the accompanying drawings. Therefore, the content above can be used in subsequent embodiments, and repeated content will not be described again.

[0158] Figure 13 A schematic diagram of the structure of a device 1300 is shown as an example. The device 1300 can implement the functions or steps implemented by the first device or the second device in the above-described method embodiments.

[0159] For example, when the device 1300 is used to implement the functions or steps implemented by the first device in the above-described method embodiments, the device 1300 may be a network device or a component in a network device (such as DU and / or RU, etc.), or it may be a terminal device or a component in a terminal device.

[0160] For example, when the device 1300 is used to implement the functions or steps implemented by the second device in the above-described method embodiments, the device 1300 may be a network device or a component in a network device (such as DU and / or RU, etc.), or it may be a terminal device or a component in a terminal device.

[0161] In one embodiment, the device 1300 may include a processing module 1301 and a transceiver module 1302. The processing module 1301 can be used for data processing, such as executing the various method embodiments described above. The processing module 1301 may also be referred to as a processing unit, etc. The transceiver module 1302 can be used to implement corresponding communication functions, such as receiving or sending relevant data, information, or messages. The transceiver module 1302 may also be referred to as a communication interface, a communication module, or a transceiver unit, etc.

[0162] The device 1300 may include a processing module 1301 but not a transceiver module 1302. Alternatively, the device 1300 may include a transceiver module 1302 but not a processing module 1301. Specifically, it depends on whether the above-described scheme executed by the device 1300 includes processing and transceiver actions.

[0163] Optionally, the device 1300 may also include a storage module. Figure 13 Not shown in the diagram. The storage module can be used to store instructions and / or data, and the processing module 1301 can read the instructions and / or data in the storage module so that the device 1300 can implement the aforementioned method embodiment.

[0164] Optionally, the transceiver module 1302 may include a sending module and a receiving module. The sending module is used to perform the sending operation in the above method embodiments. The receiving module is used to perform the receiving operation in the above method embodiments.

[0165] The device 1300 may include a transmitting module but not a receiving module. Alternatively, the device 1300 may include a receiving module but not a transmitting module. Specifically, it depends on whether the above-described scheme executed by the device 1300 includes both transmitting and receiving actions.

[0166] Optionally, the device 1300 is a chip system, the transceiver module 1302 can be the input / output interface of a chip (e.g., a baseband chip), and the processing unit can be the processor of the chip system.

[0167] In the first implementation, the device 1300 can perform the functions of the first device, executing the following: a processing module 1301, used to determine a first resource and a second resource; a transceiver module 1302, used to transmit a first signal from the first resource, the first signal being used for sensing, or the first signal being used for sensing and communication, the first resource including a first time-domain resource and a first frequency-domain resource; and to transmit DMRS from the second resource, the second resource including a second time-domain resource and a second frequency-domain resource; wherein the first time-domain resource and the second time-domain resource do not overlap, and the first frequency-domain resource and the second frequency-domain resource do not overlap.

[0168] Optionally, the first signal is used for sensing and communication, wherein the first signal includes first communication data, and the modulation order corresponding to the first signal is lower than or equal to a first threshold.

[0169] Optionally, the transceiver module 1302 is further configured to: transmit a communication signal in a third resource, the communication signal including second communication data, and the modulation order corresponding to the communication signal being higher than a first threshold.

[0170] Optionally, the transmission power of the first signal is greater than the transmission power of the communication signal, and less than or equal to the transmission power of the DMRS.

[0171] Optionally, the first frequency domain resource includes multiple sub-frequency domain resources, which are distributed at equal intervals in the frequency domain.

[0172] Optionally, the first time-domain resource includes multiple time-domain units, and the frequency domain spacing of the first signal in any two of these time-domain units is 2n or 4n, where n is a positive integer.

[0173] Optionally, the transceiver module 1302 is further configured to: send first information, the first information being used to update the frequency domain spacing of adjacent sub-frequency domain resources among multiple sub-frequency domain resources.

[0174] Optionally, within a resource block, the second frequency domain resource occupies k subcarriers, and the first frequency domain resource occupies less than or equal to 12-k subcarriers.

[0175] Optionally, the first resource and the fourth resource overlap, the fourth resource is used to carry the first reference signal, and the transceiver module 1302 is further used to: determine not to transmit the first reference signal, the first reference signal including one or more of the following: phase tracking reference signal, channel state information reference signal, or positioning reference signal.

[0176] In the second implementation, the device 1300 can perform the functions of the second device, executing the following: a transceiver module 1302 is used to receive a first signal in a first resource, the first signal being used for sensing, or the first signal being used for sensing and communication, the first resource including a first time domain resource and a first frequency domain resource; and to receive DMRS in a second resource, the second resource including a second time domain resource and a second frequency domain resource; wherein the first time domain resource and the second time domain resource do not overlap, and the first frequency domain resource and the second frequency domain resource do not overlap.

[0177] Optionally, the first signal is used for sensing and communication, wherein the first signal includes first communication data, and the modulation order corresponding to the first signal is lower than or equal to a first threshold.

[0178] Optionally, the transceiver module 1302 is further configured to: receive a communication signal in a third resource, the communication signal including second communication data, and the modulation order corresponding to the communication signal being higher than a first threshold.

[0179] Optionally, the transmission power of the first signal is greater than the transmission power of the communication signal, and less than or equal to the transmission power of the DMRS.

[0180] Optionally, the first frequency domain resource includes multiple sub-frequency domain resources, which are distributed at equal intervals in the frequency domain.

[0181] Optionally, the first time-domain resource includes multiple time-domain units, and the frequency domain spacing of the first signal in any two of these time-domain units is 2n or 4n, where n is a positive integer.

[0182] Optionally, the transceiver module 1302 is further configured to: receive first information, the first information being used to update the frequency domain spacing of adjacent sub-frequency domain resources among multiple sub-frequency domain resources.

[0183] Optionally, within a resource block, the second frequency domain resource occupies k subcarriers, and the first frequency domain resource occupies less than or equal to 12-k subcarriers.

[0184] Optionally, the processing module 1301 is specifically used to: perform channel estimation based on the first signal and DMRS.

[0185] like Figure 14 As shown in the diagram, this application provides another structural schematic of a device 1400. Device 1400 may include a processor 1420, used to implement or support device 1400 in implementing the functions of the first or second device in any method embodiment of this application. For details, please refer to the detailed descriptions in the foregoing method embodiments, which will not be repeated here. For example, processor 1420 is used to read and execute program instructions through a communication interface, so that device 1400 implements the corresponding method. Processor 1420 may include one or more processors, without limitation.

[0186] The aforementioned functional modules can be implemented in hardware or a combination of hardware and software, without limitation. Furthermore, when device 1400 includes only processor 1420, device 1400 can be a chip or a chip system.

[0187] For example, the device 1400 can be a chip system. The chip system can be composed of chips or can include chips and other discrete devices, without limitation.

[0188] Optionally, the device 1400 may further include a memory 1430 for storing program instructions and / or data. The memory 1430 is coupled to the processor 1420. This coupling can be understood as an indirect coupling or communication connection between devices, units, or modules, and can be electrical, mechanical, or other forms, used for information exchange between devices, units, or modules. The processor 1420 may operate in conjunction with the memory 1430; the processor 1420 and the memory 1430 may be integrated together or disposed separately.

[0189] Furthermore, the processor 1420 is used to execute program instructions stored in the memory 1430 so that the device 1400 implements the corresponding method.

[0190] One or more of the memories in memory 1430 may be contained within the processor, or memory 1430 may exist independently, such as off-chip memory, connected via a communication bus ( Figure 14 The memory 1430 (represented by the thick line 1440) is connected to the processor 1420. The memory 1430 and the processor 1420 can also be integrated together.

[0191] Optionally, the device 1400 also includes a communication interface 1410. Figure 14 (Represented by dashed lines), it is used for communication with other devices via a transmission medium, so that the device in device 1400 can communicate with other devices. For example, when the communication device is a first device, the other devices can be a second device, etc. Processor 1420 can use communication interface 1410 to send and receive data. For example, processor 1420 can be used to control communication interface 1410 to receive and / or send signals.

[0192] Specifically, the communication interface 1410 can be a transceiver. In terms of hardware implementation, the transceiver can be used to implement the functions of the transceiver module 1302, and the transceiver is integrated into the device 1400 to form the communication interface 1410.

[0193] The communication interface 1410 may have both sending and receiving functions, enabling the transmission and reception of signals; or it may have a sending function but no receiving function, used to transmit signals; or it may have a receiving function but no sending function, used to receive signals.

[0194] In this embodiment, the specific connection medium between the communication interface 1410, the processor 1420, and the memory 1430 is not limited. Figure 14 The memory 1430, processor 1420, and communication interface 1410 are connected via a communication bus 1440. The connections between other components are only illustrative and not intended to be limiting. The communication bus 1440 can be divided into address bus, data bus, control bus, etc. For ease of illustration, Figure 14 The symbol is represented by a single thick line, but this does not mean that there is only one communication bus or one type of communication bus.

[0195] In the embodiments of this application, the processor 1420 may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The general-purpose processor may be a microprocessor or any conventional processor. The methods disclosed in the embodiments of this application may be executed by the hardware in the processor, or by a combination of hardware and software in the processor.

[0196] In this embodiment, the memory 1430 can be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), or it can be volatile memory, such as random-access memory (RAM). The memory can also be any other medium used to carry or store program code in the form of instructions or data structures that can be accessed by a computer; or it can be a circuit or any other device capable of implementing storage functions for storing program instructions and / or data.

[0197] In a first possible implementation, device 1400 may be a first device used to implement the relevant methods corresponding to the first device in the above embodiments. For specific functions, please refer to the descriptions in the above embodiments.

[0198] For example, the methods corresponding to the first device in the above embodiments include: transmitting a first signal in a first resource, the first signal being used for sensing, or the first signal being used for sensing and communication, the first resource including a first time domain resource and a first frequency domain resource; transmitting a demodulation reference signal DMRS in a second resource, the second resource including a second time domain resource and a second frequency domain resource; wherein the first time domain resource and the second time domain resource do not overlap, and the first frequency domain resource and the second frequency domain resource do not overlap.

[0199] In a second possible implementation, device 1400 may be a second device used to implement the methods corresponding to the second device in the above embodiments. For specific functions, please refer to the descriptions in the above embodiments.

[0200] For example, the methods corresponding to the second device in the above embodiments include: receiving a first signal in a first resource, the first signal being used for sensing, or the first signal being used for sensing and communication, the first resource including a first time-domain resource and a first frequency-domain resource; receiving a demodulation reference signal DMRS in a second resource, the second resource including a second time-domain resource and a second frequency-domain resource; wherein the first time-domain resource and the second time-domain resource do not overlap, and the first frequency-domain resource and the second frequency-domain resource do not overlap.

[0201] For the specific implementation process, please refer to the relevant content in the aforementioned embodiments; it will not be repeated here.

[0202] Based on the same concept, see [link / reference] Figure 15This application embodiment also provides another device 1500, including: an input / output interface 1510 and a logic circuit 1520; the input / output interface 1510 is used to receive code instructions and transmit them to the logic circuit 1520; the logic circuit 1520 is used to run the code instructions to execute the method executed by the first device or the second device in any of the above embodiments.

[0203] In the first implementation, the device 1500 can be applied to the first device to execute the method performed by the first device, specifically, for example, the method performed by the first device in the aforementioned method embodiments. For example, the device 1500 can transmit a first signal in a first resource, the first signal being used for sensing, or the first signal being used for sensing and communication, the first resource including a first time-domain resource and a first frequency-domain resource; and transmit DMRS in a second resource, the second resource including a second time-domain resource and a second frequency-domain resource; wherein the first time-domain resource and the second time-domain resource do not overlap, and the first frequency-domain resource and the second frequency-domain resource do not overlap.

[0204] In the second implementation, the device 1500 can be applied to a second device to execute the method performed by the second device, specifically, for example, the method executed by the second device in the aforementioned method embodiments. For example, the device 1500 can receive a first signal in a first resource, where the first signal is used for sensing or for sensing and communication, and the first resource includes a first time-domain resource and a first frequency-domain resource; and receive DMRS in a second resource, where the second resource includes a second time-domain resource and a second frequency-domain resource; wherein the first time-domain resource and the second time-domain resource do not overlap, and the first frequency-domain resource and the second frequency-domain resource do not overlap.

[0205] This application also provides a system that may include one or more of the following: a first device or a second device. The first device or the second device can be found in the descriptions of the foregoing method embodiments and will not be repeated here.

[0206] This application also provides a computer-readable storage medium including program instructions that, when run on a computer, cause the computer to perform the methods or steps of the first or second apparatus described in the above embodiments.

[0207] This application also provides a computer program product, including program instructions that, when run on a computer, cause the computer to execute the methods or steps of the first or second apparatus in the above embodiments.

[0208] This application provides a chip system including a processor for implementing the functions of the first or second device in the aforementioned method (e.g., executing corresponding methods or steps). The chip system may be composed of chips or may include chips and other discrete devices.

[0209] Optionally, the chip system also includes a memory for storing program instructions that the processor can read and execute to implement the corresponding method.

[0210] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0211] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0212] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0213] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0214] The units described as separate components may or may not be physically separate. The 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 the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0215] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0216] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essential contributing part of the technical solution of this application, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0217] The above description is merely a specific embodiment of this application, but the protection scope of the embodiments of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the embodiments of this application should be included within the protection scope of the embodiments of this application. Therefore, the protection scope of the embodiments of this application should be determined by the protection scope of the claims.

Claims

1. A signal transmission method, characterized in that, include: A first signal is transmitted from a first resource, the first signal being used for sensing, or the first signal being used for sensing and communication, the first resource including a first time-domain resource and a first frequency-domain resource; The demodulation reference signal DMRS is transmitted in the second resource, which includes a second time-domain resource and a second frequency-domain resource. Wherein, the first time-domain resource does not overlap with the second time-domain resource, and the first frequency-domain resource does not overlap with the second frequency-domain resource.

2. The method as described in claim 1, characterized in that, The first signal is used for sensing and communication, wherein the first signal includes first communication data, and the modulation order corresponding to the first signal is lower than or equal to a first threshold.

3. The method as described in claim 1 or 2, characterized in that, The method further includes: A communication signal is transmitted from a third resource, the communication signal including second communication data, and the modulation order corresponding to the communication signal is higher than a first threshold.

4. The method as described in claim 3, characterized in that, The transmission power of the first signal is greater than the transmission power of the communication signal, and less than or equal to the transmission power of the DMRS.

5. The method according to any one of claims 1 to 4, characterized in that, The first frequency domain resource includes multiple sub-frequency domain resources, which are distributed at equal intervals in the frequency domain.

6. The method as described in claim 5, characterized in that, The first time-domain resource includes multiple time-domain units, and the frequency domain interval of the first signal in any two of these time-domain units is 2n or 4n, where n is a positive integer.

7. The method as described in claim 5 or 6, characterized in that, The method further includes: Send a first message, which is used to update the frequency domain spacing of adjacent sub-frequency domain resources among the plurality of sub-frequency domain resources.

8. The method according to any one of claims 1 to 7, characterized in that, Within a resource block, the second frequency domain resource occupies k subcarriers, and the number of subcarriers occupied by the first frequency domain resource is less than or equal to 12-k subcarriers.

9. The method according to any one of claims 1 to 8, characterized in that, The first resource overlaps with the fourth resource, the fourth resource being used to carry the first reference signal, and the method further includes: It is determined that the first reference signal will not be transmitted, wherein the first reference signal includes one or more of the following: a phase tracking reference signal, a channel state information reference signal, or a positioning reference signal.

10. A signal transmission method, characterized in that, include: A first signal is received in a first resource, the first signal being used for sensing, or the first signal being used for sensing and communication, the first resource including a first time domain resource and a first frequency domain resource; DMRS is received in a second resource, which includes a second time-domain resource and a second frequency-domain resource; Wherein, the first time-domain resource does not overlap with the second time-domain resource, and the first frequency-domain resource does not overlap with the second frequency-domain resource.

11. The method as described in claim 10, characterized in that, The first signal is used for sensing and communication, wherein the first signal includes first communication data, and the modulation order corresponding to the first signal is lower than or equal to a first threshold.

12. The method as described in claim 10 or 11, characterized in that, The method further includes: The third resource receives a communication signal, which includes second communication data, and the modulation order of the communication signal is higher than a first threshold.

13. The method as described in claim 12, characterized in that, The transmission power of the first signal is greater than the transmission power of the communication signal, and less than or equal to the transmission power of the DMRS.

14. The method according to any one of claims 10 to 13, characterized in that, The first frequency domain resource includes multiple sub-frequency domain resources, which are distributed at equal intervals in the frequency domain.

15. The method as described in claim 14, characterized in that, The first time-domain resource includes multiple time-domain units, and the frequency domain interval of the first signal in any two of these time-domain units is 2n or 4n, where n is a positive integer.

16. The method as described in claim 14 or 15, characterized in that, The method further includes: Receive first information, which is used to update the frequency domain spacing of adjacent sub-frequency domain resources among the plurality of sub-frequency domain resources.

17. The method according to any one of claims 10 to 16, characterized in that, Within a resource block, the second frequency domain resource occupies k subcarriers, and the number of subcarriers occupied by the first frequency domain resource is less than or equal to 12-k subcarriers.

18. The method according to any one of claims 10 to 17, characterized in that, The method further includes: Channel estimation is performed based on the first signal and the DMRS.

19. An apparatus, characterized in that, The apparatus includes a processing unit and a transceiver unit, the processing unit being coupled to the transceiver unit to perform the method as described in any one of claims 1 to 9, or to perform the method as described in any one of claims 10 to 18.

20. An apparatus, characterized in that, The device includes a processor and a memory for storing a computer program, and the processor for executing the computer program stored in the memory, such that the device performs the method as claimed in any one of claims 1 to 9, or such that the device performs the method as claimed in any one of claims 10 to 18.

21. A computer-readable storage medium, characterized in that, The device stores a computer program or instructions that, when executed, cause the method as described in any one of claims 1 to 9, or the method as described in any one of claims 10 to 18, to be implemented.

22. A computer program product, characterized in that, The computer program product includes a computer program that, when run on a computer, enables the method as described in any one of claims 1 to 9, or the method as described in any one of claims 10 to 18, to be implemented.

23. A chip system, characterized in that, The chip system includes: A processor and an interface, the processor being configured to call and execute instructions from the interface, wherein when the processor executes the instructions, it implements the method as described in any one of claims 1 to 9, or implements the method as described in any one of claims 10 to 18.

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