Signal transmission method and apparatus

Abstract

A signal transmission method and an apparatus, which are applied to the technical field of communications. The method comprises: sending a first signal on a first resource, the first signal being used for sensing or the first signal being used for sensing and communication, and the first resource comprising a first time domain resource and a first frequency domain resource; and sending a DMRS on a second resource, the second resource comprising a second time domain resource and a second frequency domain resource, wherein the first time domain resource does not overlap the second time domain resource, and the first frequency domain resource does not overlap the second frequency domain resource. Both the first signal and the DMRS can be used for channel estimation, which is equivalent to providing a first signal for channel estimation on the basis of the DMRS, thereby improving the accuracy of channel estimation and thus improving communication performance. The first signal can also be used for sensing, and therefore sensing performance can also be improved.

Description

A signal transmission method and apparatus

[0001] Cross-reference to Related Applications

[0002] This application claims priority to the Chinese Patent Application No. 202410666284.1, filed on May 23, 2024, and entitled "A Signal Transmission Method and Apparatus", the content of which is incorporated herein by reference in its entirety; and this application claims priority to the Chinese Patent Application No. 202410722897.2, filed on June 05, 2024, and entitled "A Signal Transmission Method and Apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the field of communication technology, and in particular, to a signal transmission method and apparatus. BACKGROUND

[0004] Integrated sensing and communication (ISAC) is a key application scenario of a wireless communication system. ISAC refers to the ability to simultaneously achieve communication and sensing through wireless signals. The communication ability refers to the ability to send information, such as the transmission rate of signals, the anti-interference ability, and the like. The sensing ability refers to the ability to sense the surrounding environment, the moving speed of objects, the distance, and the like through wireless signals.

[0005] In order to improve the uplink and downlink transmission performance, a demodulation reference signal (DMRS) can be used for uplink and downlink equivalent channel estimation at present, and the received information is equalized based on the channel estimation result, so as to remove the influence of channel distortion on information transmission. However, the DMRS is mainly used for channel estimation of a communication link, and cannot meet the requirements of ISAC. SUMMARY

[0006] Embodiments of the present application provide a signal transmission method and apparatus to improve communication performance.

[0007] In a first aspect, a first signal transmission method is provided. The method can be performed by a first apparatus, or can be performed by a device including the first apparatus, or can be performed by a chip system (or, a chip) or a functional module capable of realizing the functions of the first apparatus, such as the chip system or the functional module being arranged in the first apparatus. For example, the first apparatus can be a network device, or can be a terminal device, without limitation.

[0008] The method takes the first device as an execution subject, and includes: sending a first signal at 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 sending a DMRS at a second resource, the second resource including 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.

[0009] In the embodiments of the present application, for example, the first signal and the DMRS can both be used for channel estimation, which is equivalent to adding the first signal used for channel estimation on the basis of the DMRS, thereby being able to improve the accuracy of channel estimation and thereby improving the communication performance. The first signal can also be used for sensing, thereby being able to improve both the communication performance and the sensing performance. In addition, the resources occupied by the first signal and the resources occupied by the DMRS do not overlap, which can reduce resource collision. Furthermore, the resources occupied by the first signal and the resources occupied by the DMRS do not overlap, which is conducive to causing the first signal and the DMRS to "surround" the communication signal, and can improve the accuracy of channel estimation.

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

[0011] In the embodiments of the present application, a lower modulation order is used to obtain the first signal, which can ensure that the first signal is as constant as possible in modulus, so that the signal has better sensing performance.

[0012] In a possible implementation, a communication signal is sent at a third resource, the communication signal including second communication data, and a modulation order corresponding to the communication signal is higher than the first threshold.

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

[0014] In a 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 the embodiments of the present application, the transmission power of the first signal is increased to a certain extent, which can improve the accuracy of channel estimation and is conducive to improving the communication performance.

[0016] In a possible implementation, the first frequency domain resource includes a plurality of sub-frequency domain resources, and the plurality of sub-frequency domain resources are equally spaced in the frequency domain.

[0017] In the embodiments of the present application, the plurality of sub-frequency domain resources included in the first frequency domain resource are equally spaced in the frequency domain, which is conducive to obtaining diversity gain in the frequency domain.

[0018] In a possible implementation, the first time domain resource includes a plurality of time domain units, and a frequency domain interval of the first signal on any two time domain units is 2n or 4n, where n is a positive integer.

[0019] In the embodiment of the application, the frequency hopping distribution of the first signal helps to obtain diversity gain in the time domain and the frequency domain, and enables the first signal and the DMRS to surround the communication signal as much as possible, thereby improving the accuracy of channel estimation.

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

[0021] In the embodiment of the application, the frequency interval between the adjacent two sub-frequency domain resources occupied by the first signal in the plurality of sub-frequency domain resources is flexible and adjustable.

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

[0023] In the embodiment of the application, the number of sub-frequency domain resources occupied by the first signal in one resource block is flexible and variable.

[0024] In a possible implementation, the first resource overlaps the fourth resource, and the fourth resource is used to carry a first reference signal, and the method further includes: determining not to send the first reference signal, and 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.

[0025] In the embodiment of the application, the resource occupied by the first signal conflicts with the resource occupied by the first reference signal, and it can be determined not to send the first reference signal, thereby preferentially ensuring the sending of the first signal.

[0026] In a second aspect, a second signal transmission method is provided, which can be executed by a second device, or can also be executed by equipment including the second device, or can also be executed by a chip system (or, a chip) or other functional modules, which can realize the functions of the second device, for example, the chip system or the functional modules are arranged in the second device. For example, the second device can be a network device, or can also be a terminal device, which is not limited.

[0027] The method can be used for the second device as an execution subject. The method comprises: receiving a first signal at 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; and receiving a DMRS at a second resource, the second resource comprising 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 a possible implementation, the first signal is used for sensing and communication, wherein the first signal comprises first communication data, and a modulation order corresponding to the first signal is lower than or equal to a first threshold.

[0029] In a possible implementation, a communication signal is received at a third resource, the communication signal comprising second communication data, and a modulation order corresponding to the communication signal is higher than the first threshold.

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

[0031] In a possible implementation, the first frequency domain resource comprises a plurality of sub-frequency domain resources, and the plurality of sub-frequency domain resources are equally spaced in the frequency domain.

[0032] In a possible implementation, the first time domain resource comprises a plurality of time domain units, and a frequency domain interval of the first signal on any two time domain units is 2n or 4n, n being a positive integer.

[0033] In a possible implementation, the method further comprises: receiving first information, the first information being used for updating a frequency domain interval of adjacent sub-frequency domain resources in the plurality of sub-frequency domain resources.

[0034] In a possible implementation, in one resource block, the second frequency domain resource occupies k subcarriers, and a number of subcarriers occupied by the first frequency domain resource is less than or equal to 12-k subcarriers.

[0035] In a possible implementation, the method further comprises: performing channel estimation according to the first signal and the DMRS.

[0036] In a third aspect, the present application provides a device, which can be used to execute the method in the first aspect and any possible implementation thereof. The device can be, for example, the first device.

[0037] In a possible implementation, the device can comprise a baseband device and a radio frequency device.

[0038] In another possible implementation, the apparatus can include a processing module (also sometimes referred to as a processing unit) and a transceiving module (also sometimes referred to as a transceiving unit). The transceiving module can implement the sending function and the receiving function. When the transceiving module implements the sending function, it can be referred to as a sending module (also sometimes referred to as a sending unit). When the transceiving module implements the receiving function, it can be referred to as a receiving module (also sometimes referred to as a receiving unit). The sending module and the receiving module can be the same functional module, which is referred to as the transceiving module, and the functional module can implement the sending function and the receiving function. Alternatively, the sending module and the receiving module can be different functional modules, and the transceiving module is a general term for these functional modules.

[0039] In a fourth aspect, the present application provides an apparatus. The apparatus can be configured to perform the method in the second aspect and any possible implementation of the second aspect.

[0040] In a possible implementation, the apparatus can include a baseband apparatus and a radio frequency apparatus.

[0041] In another possible implementation, the apparatus can include a processing module (also sometimes referred to as a processing unit) and a transceiving module (also sometimes referred to as a transceiving unit). The transceiving module can implement the sending function and the receiving function. When the transceiving module implements the sending function, it can be referred to as a sending module (also sometimes referred to as a sending unit). When the transceiving module implements the receiving function, it can be referred to as a receiving module (also sometimes referred to as a receiving unit). The sending module and the receiving module can be the same functional module, which is referred to as the transceiving module, and the functional module can implement the sending function and the receiving function. Alternatively, the sending module and the receiving module can be different functional modules, and the transceiving module is a general term for these functional modules.

[0042] In a fifth aspect, the present application also provides an apparatus. The apparatus can be a signal sending end, or a chip or chip system used in the signal sending end. The apparatus can include one or more processors. Optionally, the apparatus can also include a memory. The memory can be configured to store one or more computer programs or instructions. The one or more processors can be configured to execute the one or more computer programs or instructions stored in the memory, so that the apparatus performs the method in the first aspect and any possible implementation of the first aspect.

[0043] In a sixth aspect, the present application provides an apparatus. The apparatus can be a signal receiving end, or a chip or chip system used in a signal receiving end. The apparatus can include one or more processors. Optionally, the apparatus can further include a memory. The memory is configured to store one or more computer programs or instructions. The one or more processors are configured to execute the one or more computer programs or instructions stored in the memory, so that the apparatus performs the method in the second aspect and any possible implementation manner thereof.

[0044] In a seventh aspect, the present application provides a system. The system can include a first apparatus and / or a second apparatus. The first apparatus is configured to perform the method in the first aspect and any possible implementation manner thereof, and the second apparatus is configured to perform the method in the second aspect and any possible implementation manner thereof. The first apparatus is implemented by the apparatus in the third aspect or the fifth aspect, and the second apparatus is implemented by the apparatus in the fourth aspect or the sixth aspect.

[0045] In a possible implementation manner, the first apparatus is configured to transmit a first signal in a first resource, the first signal is used for sensing, or the first signal is used for sensing and communication, the first resource includes a first time domain resource and a first frequency domain resource; and transmit a demodulation reference signal (DMRS) in a second resource, the second resource 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.

[0046] In a possible implementation manner, the second apparatus is configured to receive a first signal in a first resource, the first signal is used for sensing, or the first signal is used for sensing and communication, the first resource includes a first time domain resource and a first frequency domain resource; and receive a demodulation reference signal (DMRS) in a second resource, the second resource 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.

[0047] The technical effects achieved by the seventh aspect and any possible implementation manner thereof can refer to the technical effects achieved by the first aspect and the second aspect and any possible implementation manner thereof, which will not be repeated here.

[0048] In an eighth aspect, the present application provides a computer readable storage medium. The computer readable storage medium is configured to store a computer program or instructions. When the computer program or instructions are executed, the method in the first aspect or the second aspect and any possible implementation manner thereof is implemented.

[0049] In a ninth aspect, the present application further provides a computer program product, which comprises a computer program, and when the computer program is run on a computer, the method in the first aspect or the second aspect and any possible implementation manner thereof is realized.

[0050] The technical effects achieved by the sixth aspect to the ninth aspect and any possible implementation manner thereof can be referred to the technical effects achieved by the first aspect or the second aspect and any possible implementation manner thereof, and will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0051] FIG. 1A is a schematic diagram of a single station sensing mode;

[0052] FIG. 1B is a schematic diagram of a double station sensing mode;

[0053] FIG. 2A to FIG. 2D are schematic diagrams of DMRS patterns;

[0054] FIG. 3A is a schematic diagram of a DMRS and an additional DMRS pattern of configuration type 1 and single pre-symbols;

[0055] FIG. 3B is a schematic diagram of a DMRS and an additional DMRS pattern of configuration type 1 and double pre-symbols;

[0056] FIG. 4 is a schematic diagram of a wireless communication system;

[0057] FIG. 5A to FIG. 5F are schematic diagrams of several sensing scenarios applied by embodiments of the present application;

[0058] FIG. 6A and FIG. 6B are schematic diagrams of two application scenarios of embodiments of the present application;

[0059] FIG. 7 is a flow chart of a signal transmission method provided by an embodiment of the present application;

[0060] FIG. 8A and FIG. 8B are schematic diagrams of several patterns of configuration type 1, single pre-symbols DMRS and first signals provided by embodiments of the present application;

[0061] FIG. 9A to FIG. 9D are schematic diagrams of several patterns of configuration type 1 DMRS and frequency hopping distributed first signals provided by embodiments of the present application;

[0062] FIG. 10A to FIG. 10C are schematic diagrams of several patterns of configuration type 2 DMRS and frequency hopping distributed first signals provided by embodiments of the present application;

[0063] FIG. 11A to FIG. 11C are schematic diagrams of time domain distribution of first signals provided by embodiments of the present application;

[0064] FIG. 12 is a schematic diagram of comparison of communication performance of the scheme of embodiments of the present application and other schemes.

[0065] FIG. 13 is a structural schematic diagram of an apparatus provided by an embodiment of the present application;

[0066] FIG. 14 is a structural schematic diagram of another apparatus provided by an embodiment of the present application;

[0067] FIG. 15 is a structural schematic diagram of still another apparatus provided by an embodiment of the present application;

[0068] FIG. 16 is a schematic diagram of a front DMRS and an additional DMRS;

[0069] FIG. 17 is a schematic diagram of another pattern of a first signal of a DMRS of configuration type 1 and frequency hopping distribution provided by an embodiment of the present application;

[0070] FIG. 18 is a schematic diagram of still another pattern of a first signal of a DMRS of configuration type 2 and frequency hopping distribution provided by an embodiment of the present application. DETAILED DESCRIPTION

[0071] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0072] In the embodiments of the present application, the number of a noun, unless otherwise specified, represents "a singular noun or a plural noun", i.e. "one or more". "At least one" means one or more, and "multiple" means two or more. "And / or" describes the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, B exists alone, wherein A and B can be singular or plural. The character " / " generally represents that the associated objects before and after it are in an "or" relationship. For example, A / B means A or B. "At least one of the following" or similar expressions means any combination of these items, including any combination of single item or multiple 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, wherein a, b, and c can be single or multiple.

[0073] The ordinal numbers, such as "first", "second", etc., mentioned in the embodiments of the present application are used to distinguish a plurality of objects, and are not used to limit the size, content, order, time sequence, priority or importance of the plurality of objects. For example, the first terminal device and the second terminal device can be the same terminal device, or can be different terminal devices, and such names do not represent the difference in structure, priority or importance of the two terminal devices. In addition, the numbering of steps in each embodiment introduced in the present application is only to distinguish different steps, and is not used to limit the order between the steps. For example, S701 can occur before S702, or can occur after S702, or can occur simultaneously with S702.

[0074] In the embodiments of the present application, the terminal device is a device with wireless transceiving function, which can be a fixed device, a mobile device, a handheld device (for example, a mobile phone), a wearable device, a vehicle-mounted device, or a wireless device (for example, a communication module, a modem, or a chip system, etc.) built in the above devices. The terminal device is used to connect people, things, machines, etc., and can be widely used in various scenarios, for example, including but not limited to the following scenarios: sensing scenarios, cellular communication, device-to-device (D2D) communication, vehicle to everything (V2X) communication, machine-to-machine / machine-type communications (M2M / MTC), internet of things (IoT), virtual reality (VR), augmented reality (AR), industrial control, self driving, remote medical, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, unmanned aerial vehicle, robot, indoor commercial scenarios (such as mobile phone screen projection, file sharing, mobile phone to VR glasses video transmission) and other scenarios. When the terminal device is applied to V2X, it can also be referred to as a V2X device, for example, a smart car, a digital car, an unmanned car, a self-driving car, a pure EV, a hybrid electric vehicle (HEV), a range extended EV (REEV), a plug-in HEV (PHEV), a new energy vehicle, a road site unit (RSU), etc. The terminal device can also be a device in D2D communication, for example, a water meter, a gas meter, etc.

[0075] In addition, in the embodiments of the present application, the terminal device can also be a terminal device in an IoT system. IoT is an important part of future information technology development. Its main technical feature is to connect objects to the network through communication technology, so as to realize the intelligent network of man-machine interconnection and object-object interconnection.

[0076] As introduced above, various terminal devices can be considered as vehicle-mounted terminal devices if they are located on a vehicle (for example, placed in or installed in a vehicle), and the vehicle-mounted terminal device is also referred to as an on-board unit (OBU). The terminal device of the present application can also be an on-board module, an on-board module group, an on-board component, an on-board chip or an on-board unit built in a vehicle as one or more components or units, and the vehicle can implement the method of the present application through the built-in on-board module, on-board module group, on-board component, on-board chip or on-board unit.

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

[0078] In the embodiments of the present application, the device for implementing the function of the terminal device can be a terminal device or a device capable of supporting the terminal device to implement the function, such as a chip system, which can be installed in the terminal device. In the technical solutions provided in the embodiments of the present application, the device for implementing the function of the terminal device is taken as an example to describe the technical solutions provided in the embodiments of the present application. In addition, for the convenience of description, the terminal device is taken as an example to illustrate the embodiments of the present application.

[0079] The network device in the embodiments of the present application, for example, includes an access network device and / or a core network device. The access network device is a device with wireless transceiving function, used for communicating with the terminal device. The access network device includes but is not limited to a base station (base transceiver station (BTS), Node B, evolved Node B (eNodeB) / eNB, or the next generation Node B (gNodeB) / gNB), a transmission reception point (TRP), a base station evolved from the 3rd generation partnership project (3GPP), an access node in a wireless fidelity (Wi-Fi) system, a wireless relay node, a wireless backhaul node, and the like. The base station can be a macro base station, a micro base station, a pico base station, a small station, a relay station, and the like. Multiple base stations can support a network of the same access technology or a network of different access technologies. A base station can include one or more co-sited or non-co-sited transmission reception points. The access network device can also be a wireless controller, a centralized unit (CU), and / or a distributed unit (DU) in a cloud radio access network (CRAN) scenario. The access network device can also be a server and the like. For example, the network device in the V2X technology can be a road side unit (RSU). The following describes the access network device by taking a base station as an example. The base station can communicate with the terminal device or communicate with the terminal device through a relay station. The terminal device can communicate with multiple base stations in different access technologies. The core network device is used to implement mobile management, data processing, session management, policy and charging, and the like. The names of devices implementing core network functions in systems of different access technologies can be different, and the embodiments of the present application do not limit this. Taking the 5th generation (5G) system as an example, the core network device includes an access and mobility management function (AMF), a session management function (SMF), a policy control function (PCF), a user plane function (UPF), and the like.

[0080] In the CU-DU architecture, the access network device can include one or more of a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), and the like. The CU and the DU can be separately arranged or included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0081] In different systems, the CU (or CU-CP and CU-UP), DU, or RU can also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, the CU can also be referred to as an open CU (O-CU), the DU can also be referred to as an O-DU, the CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, and the RU can also be referred to as an O-RU. For the convenience of description, the CU, CU-CP, CU-UP, DU, and RU are taken as examples for description in the embodiments of the present application. Any of the CU (or CU-CP, CU-UP), DU, and RU in the embodiments of the present application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0082] Optionally, in various embodiments of the present application, if the access network device is a distributed architecture, for example, the access network device includes a CU and a DU, or includes a CU-CP, a CU-UP, and a DU, the access network device sends information to the UE, and specifically, the DU included in the access network device sends information to the UE; the access network device receives information from the UE, and specifically, the DU included in the access network device receives information from the UE.

[0083] In the embodiments of the present application, the device for implementing the function of the network device can be a network device or a device capable of supporting the network device to implement the function, such as a chip system, which can be installed in the network device. In the technical solutions provided in the embodiments of the present application, the device for implementing the function of the network device is taken as an example to describe the technical solutions provided in the embodiments of the present application.

[0084] The following explains some terms or concepts in the embodiments of the present application to facilitate understanding by those skilled in the art.

[0085] 1. Time domain resource.

[0086] The time domain resource includes one or more time domain units. Alternatively, the time domain unit can be referred to as a time unit, etc., without limitation. The time domain unit can refer to a period of time in the time domain, and the time domain unit is, for example, a radio frame, a subframe, a slot, a mini-slot, or a time domain symbol, etc. The time domain symbol can be referred to simply as a symbol. The time domain symbol can be an orthogonal frequency division multiplexing (OFDM) symbol, or a discrete fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) symbol.

[0087] 2. Frequency domain resource.

[0088] The frequency domain resource includes one or more sub-frequency domain resources. The sub-frequency domain resource can also be referred to as a frequency domain unit. The frequency domain unit includes, for example, a band, a component carrier (CC), a subcarrier, a bandwidth part (BWP), one or more resource blocks (RBs), an RB set, a resource element (RE), or a subchannel, etc. Optionally, a subchannel can include one or more RBs that are continuous or interlaced in the frequency domain, and the size of the subchannel can be measured by the number of RBs included in the subchannel, for example, the number of RBs included in a subchannel can be 10, 12, 15, 20, 25, or 50, etc.

[0089] 3. Sensing mode.

[0090] For sensing, according to the difference between the sender and the receiver of the signal used for sensing (for example, referred to as a sensing signal), the sensing mode can be divided into two modes: single-station sensing and double-station sensing. Among them, the single-station sensing mode is also called self-transmission and self-reception mode, which means that the device that transmits the sensing signal and the device that receives the echo signal reflected by the target are the same device, as shown in FIG. 1A, both the device that transmits the sensing signal and the device that receives the echo signal are device 1; the double-station sensing mode is also called A-transmission and B-reception mode or self-transmission and other-reception mode, which means that the device that transmits the sensing signal and the device that receives the echo signal reflected by the target are different devices, as shown in FIG. 1B, the device that transmits the sensing signal is device 2, and the device that receives the echo signal is device 3. FIG. 1A and FIG. 1B both take the sensing target (or referred to as a scatterer) as a vehicle as an example. Among them, the device 1 in FIG. 1A is, for example, a network device or a UE. The device 2 in FIG. 1B is, for example, a network device or a UE, and the device 3 in FIG. 1B is, for example, a network device or a UE. The embodiments of the present application can use single-station sensing mode or double-station sensing mode.

[0091] 4、DMRS.

[0092] The DMRS can be used for channel estimation, and the estimated channel information can be used for data demodulation. In different communication systems, the name of the DMRS can change, and the embodiments of the present application do not limit the name. For example, a signal that can be used for channel estimation can be used to replace the DMRS in the embodiments of the present application. In the time domain, the DMRS occupies at least one orthogonal frequency division multiplexing (OFDM) symbol; in the frequency domain, the DMRS occupies at least one subcarrier. The NR communication system supports two DMRS configuration types, namely configuration type 1 and configuration type 2. The configuration type can also be referred to as a pattern type or a type, and is not limited. The DMRS can include a front-loaded DMRS or a front-loaded DMRS and an additional DMRS. The front-loaded DMRS is located at the front end of the communication signal, and the DMRS is usually transmitted before the communication signal, which can reduce the signal processing delay of the receiving end. For example, the front-loaded DMRS can occupy one OFDM symbol (referred to as single front-loaded DMRS), for example, OFDM symbol 2 or OFDM symbol 3 in a slot (the OFDM symbol in the slot can start from OFDM symbol 0); or the front-loaded DMRS can also occupy two OFDM symbols (referred to as double front-loaded DMRS). The additional DMRS can occupy one or more OFDM symbols, for example, generally 3 or 4 OFDM symbols, and the interval between the one or more OFDM symbols is equal to the time domain interval between the additional DMRS and the front-loaded DMRS, and the one DMRS is the DMRS adjacent to the front-loaded DMRS in the additional DMRS.

[0093] Exemplarily, as shown in FIG. 2A, for the DMRS of configuration type 1 and single front-loaded symbol, the DMRS occupies one OFDM symbol, and at most 4 DMRS ports are supported. The time-frequency resource mapping manner of the DMRS (that is, the DMRS pattern) is as shown in FIG. 2A. For the DMRS of configuration type 1 and double front-loaded symbol, the DMRS occupies two OFDM symbols, and at most 8 DMRS ports are supported. The DMRS pattern is as shown in FIG. 2B. For the DMRS of configuration type 2 and single front-loaded symbol, the DMRS occupies one OFDM symbol, and at most 6 DMRS ports are supported. The DMRS pattern is as shown in FIG. 2C. For the DMRS of configuration type 2 and double front-loaded symbol, the DMRS occupies two OFDM symbols, and at most 12 DMRS ports are supported. As shown in FIG. 2D.

[0094] The NR communication system also supports a combination of front-loaded DMRS and additional DMRS to adapt to higher mobile speed. In one slot, generally one to three groups of additional DMRS are included, one group of additional DMRS can be considered as a repetition of the front-loaded DMRS, for example, the pattern of each group of additional DMRS can be a repetition of the pattern of the front-loaded DMRS; or the pattern of each group of additional DMRS can be the same as the pattern of the front-loaded DMRS. For example, a DMRS with a single front-loaded symbol is included in a slot, and three groups of additional DMRS are included, which is equivalent to the DMRS with the single front-loaded symbol being repeated three times in the slot. For another example, a DMRS with double front-loaded symbols is included in a slot, and two groups of additional DMRS are included, which is equivalent to the DMRS with the double front-loaded symbols being repeated twice in the slot. The number of DMRS included in each group of additional DMRS can be the same as the number of DMRS included in the front-loaded DMRS. For example, for a DMRS with a single front-loaded symbol of configuration type 1, each group of additional DMRS includes 6 DMRS. In addition, the DMRS included in each group of additional DMRS and the front-loaded DMRS can occupy the same subcarriers. Alternatively, for a DMRS with a single front-loaded symbol of configuration type 1, at most three groups of additional DMRS can be added, as shown in FIG. 3A; for a DMRS with double front-loaded symbols, at most two groups of additional DMRS can be added, as shown in FIG. 3B. FIGS. 3A and 3B illustrate an example of configuration type 1 and DMRS port 1. It should be understood that the number of time domain symbols included in a slot can vary, for example, a slot includes 12 time domain symbols or 14 time domain symbols, and FIGS. 3A and 3B show part of the slot rather than the whole slot.

[0095] Alternatively, one group of additional DMRS can also be included in a slot. For example, for a DMRS with double front-loaded symbols, one group of additional DMRS can be added, as shown in FIG. 16. FIG. 16 illustrates an example of configuration type 1 and DMRS port 1. FIG. 16 shows part of the slot rather than the whole slot.

[0096] The DMRS patterns shown in FIGS. 2A-2D, 3A, 3B, and 16 are examples and do not limit the DMRS patterns. For example, the DMRS patterns can vary in different communication systems. When the DMRS pattern is another pattern (for example, configuration type 2 under DMRS port 1, and a DMRS pattern with double front-loaded symbols, etc.), or the DMRS pattern varies, the signal transmission method provided by the embodiments of the present application is still applicable.

[0097] The DMRS can be used for channel estimation of uplink and downlink communication links. Taking the downlink as an example, the network device can send a communication signal on the configured time-frequency resource, and insert the DMRS in the time-frequency resource configured to send the communication signal, so that the DMRS is transmitted together with the communication signal. The terminal device can perform channel estimation according to the DMRS, and perform equalization and other processing on the communication signal based on the channel estimation result, so as to remove the influence of channel distortion on the transmission of the communication signal.

[0098] However, with the proposal of the communication and sensing integrated scenario in 6G, it is necessary to consider the communication performance and sensing performance of wireless signals. For example, the wireless signal sent by the sending end to the receiving end needs to meet the sensing requirement and the communication requirement. Among them, the sensing requirement refers to the relative position between the receiving end and the obstacle in the environment around the sending end, the moving speed of the sending end, the moving speed of the obstacle, or the distance, etc. The communication requirement refers to the sending of communication data by the sending end to the receiving end. Therefore, channel estimation by only DMRS cannot meet the requirements of ISAC.

[0099] In view of this, in the embodiments of the present application, both the first signal and the DMRS can be used for channel estimation, which is equivalent to adding the first signal used for channel estimation on the basis of the DMRS, thereby improving the accuracy of channel estimation and improving the communication performance. The first signal can also be used for sensing, so that the embodiments of the present application can improve both the communication performance and the sensing performance. In addition, the resources occupied by the first signal and the resources occupied by the DMRS do not overlap, which can reduce resource collision. In addition, the resources occupied by the first signal and the resources occupied by the DMRS do not overlap, which is beneficial to make the first signal and the DMRS "surround" the communication signal, which can improve the accuracy of channel estimation.

[0100] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example, an ISAC communication system, a universal mobile telecommunications system (UMTS), a wireless local area network (WLAN), a short-range wireless communication system (such as a sidelink, wireless fidelity (Wi-Fi), Bluetooth, and the like), a wired network, a vehicle to everything (V2X) communication system, a device-to-device (D2D) communication system, a vehicle networking communication system, a 4th generation (4G) mobile communication system (such as a long term evolution (LTE) system), an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD), a worldwide interoperability for microwave access (WiMAX) communication system, a 5th generation (5G) mobile communication system (such as a new radio (NR) system), a future communication system (such as a 6th generation (6G) mobile communication system), or other similar communication systems, and the like, without limitation. The embodiments of the present application are described by taking a communication system shown in FIG. 4 as an example, and when the technical solutions of the embodiments of the present application are applied to other communication systems, the devices, components, modules, and the like in the embodiments can be replaced by corresponding devices, components, modules in other communication systems, without limitation.

[0101] FIG. 4 is a schematic diagram of a communication system used in the embodiments of the present application. The communication system can include a first device and a second device.

[0102] The communication system can complete certain functions, such as synchronization, channel estimation, or sensing, and the like.

[0103] In the embodiments of the present application, the first device in FIG. 4 can refer to the first device itself, a component (for example, a processor, a chip, or a chip system, and the like) in the first device, or a logic module or software capable of realizing all or part of the functions of the first device, without special indication.

[0104] The second device in FIG. 4 can refer to the second device itself, a component (for example, a processor, a chip, or a chip system, etc.) in the second device, or a logic module or software capable of realizing all or part of the functions of the second device without special indication.

[0105] The terminal device in the embodiments of the present application can be located in the beam / cell coverage range of the network device, and the network device can provide communication services for the terminal device.

[0106] The following describes several possible scenarios to which the embodiments of the present application are applied.

[0107] One possible scenario is a sensing scenario, as shown in FIGS. 5A-5F. FIGS. 5A-5F involve six sensing scenarios, which are a network device A self-transmission and self-reception scenario, as shown in FIG. 5A; a terminal device A self-transmission and self-reception scenario, as shown in FIG. 5B; a network device A transmits a sensing signal and a network device B receives a return signal scenario, as shown in FIG. 5C; a terminal device A transmits a sensing signal and a terminal device B receives a return signal scenario, as shown in FIG. 5D; a network device A transmits a sensing signal and a terminal device A receives a return signal scenario, as shown in FIG. 5E; and a terminal device A transmits a sensing signal and a network device A receives a return signal scenario, as shown in FIG. 5F.

[0108] In FIGS. 5A-5F, the sensing target is taken as a vehicle for example, but the embodiments of the present application are not limited thereto. For example, the sensing target can also be a pedestrian, a low-altitude unmanned aerial vehicle, or other moving or stationary objects. In FIGS. 5A-5F, the terminal device is taken as a smartphone for example, but the embodiments of the present application are not limited thereto. In addition, the sensing modes to which the six sensing scenarios provided in FIGS. 5A-5F belong correspond to the single-station sensing mode or the double-station sensing mode indicated in FIGS. 1A and 1B, respectively. For example, FIGS. 5A and 5B belong to the single-station sensing mode, and FIGS. 5C-5F belong to the double-station sensing mode.

[0109] One possible communication scenario can be a wireless communication system such as a cellular communication system, as shown in FIG. 6A. The network device can be a base station, and one base station can serve multiple terminal devices, as shown in (a) of FIG. 6A; one terminal device can communicate with multiple base stations, as shown in (b) of FIG. 6A.

[0110] One possible communication scenario can be a wireless communication system such as a wireless local area network, as shown in FIG. 6B. The network device can be an AP, and one AP can serve multiple terminal devices, as shown in (a) of FIG. 6B; one terminal device can communicate with multiple APs, as shown in (b) of FIG. 6B.

[0111] The communication system described in the embodiments of the present application is for more clearly illustrating the technical solutions of the embodiments of the present application, and does not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that, with the evolution of network architecture and the appearance of new business scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0112] The embodiments of the present application are described below with reference to the accompanying drawings. The embodiments of the present application can be applied to the network architecture shown in FIG. 4, FIG. 5A-FIG. 5F, FIG. 6A or FIG. 6B. For example, the first device involved in the embodiments of the present application can be the first device in FIG. 4, and the second device involved in the embodiments of the present application can be the second device in FIG. 4; or the first device involved in the embodiments of the present application can be the network device A in FIG. 5A, and the second device involved in the embodiments of the present application can be the network device A in FIG. 5A; or the first device involved in the embodiments of the present application can be the terminal device A in FIG. 5B, and the second device involved in the embodiments of the present application can be the terminal device A in FIG. 5B; or the first device involved in the embodiments of the present application can be the network device A in FIG. 5C, and the second device involved in the embodiments of the present application can be the network device B in FIG. 5C; or the first device involved in the embodiments of the present application can be the terminal device A in FIG. 5D, and the second device involved in the embodiments of the present application can be the terminal device B in FIG. 5D; or the first device involved in the embodiments of the present application can be the network device A in FIG. 5E, and the second device involved in the embodiments of the present application can be the terminal device A in FIG. 5E; or the first device involved in the embodiments of the present application can be the terminal device A in FIG. 5F, and the second device involved in the embodiments of the present application can be the network device A in FIG. 5F; or the first device involved in the embodiments of the present application can be a certain base station in FIG. 6A, and the second device involved in the embodiments of the present application can be a certain terminal device in FIG. 6A, which is covered by the base station for example; or the first device involved in the embodiments of the present application can be a certain terminal device in FIG. 6A, and the second device involved in the embodiments of the present application can be a certain base station in FIG. 6A, which covers the terminal device for example; or the first device involved in the embodiments of the present application can be a certain terminal device in FIG. 6A, and the second device involved in the embodiments of the present application can be another terminal device in FIG. 6A; or the first device involved in the embodiments of the present application can be a certain AP in FIG. 6B, and the second device involved in the embodiments of the present application can be a certain terminal device in FIG. 6B, which is covered by the AP for example; or the first device involved in the embodiments of the present application can be a certain terminal device in FIG. 6B, and the second device involved in the embodiments of the present application can be a certain AP in FIG. 6B, which covers the terminal device for example; or the first device involved in the embodiments of the present application can be a certain terminal device in FIG. 6B, and the second device involved in the embodiments of the present application can be another terminal device in FIG. 6B.

[0113] As shown in FIG. 7, a flow chart of a signal transmission method provided by an embodiment of the present application is shown.

[0114] S701, the first device transmits a first signal on a first resource, and correspondingly, the second device receives the first signal on the first resource.

[0115] 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 sensing and communication. The first signal can also be referred to as a sensing signal or a sensing reference signal (SeRS), and the like, without limitation on the name. When the first signal is used for sensing, it can be understood that the first signal is used for sensing and not for communication, for example, the first signal is a signal used for sensing or a signal dedicated for sensing. In the embodiments of the present application, "the first signal is not used for communication" can be understood as that the first signal does not include communication data. For example, even if the first signal is not used for communication (for example, does not include communication data), the first signal can also be used for channel estimation.

[0116] The first signal can be used for sensing and communication, which can be understood as that the first signal can be used for sensing and can also be used for communication.

[0117] Optionally, the first signal can be a phase modulation symbol, for example, the first signal is implemented in the form of a sequence. In one example, the phase modulation symbol can be a symbol generated based on a binary sequence modulation, and the binary sequence 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 the ZC sequence; or the sequence of the first signal is a sequence obtained by cyclically extending the ZC sequence. For example, if the first signal is used for sensing, or the first signal is used for sensing and not for communication, the first signal can be a phase modulation symbol.

[0118] 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 a first threshold. If the modulation order of the first signal is too high, the first signal can have poor sensing performance, and 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 256 quadrature amplitude modulation (QAM), and the modulation mode 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, the first threshold is the modulation order corresponding to 64QAM, and the modulation mode corresponding to the first signal is, for example, PSK, BPSK, QPSK, or 16QAM. For another example, the first threshold is the modulation order corresponding to 16QAM, and the modulation mode corresponding to the first signal is, for example, PSK, BPSK, or QPSK. Alternatively, the first threshold can also be a modulation order lower than the modulation order corresponding to 16QAM, for example, the modulation order corresponding to QPSK; or the first threshold can also be a modulation order higher than the modulation order corresponding to 256QAM, and the embodiments of the present application do not limit this, as long as the first threshold can enable the first signal to have better sensing performance. For example, the modulation mode corresponding to the first signal is QPSK, and the advantage of selecting QPSK is that the constellation points corresponding to QPSK are constant modulus, so that the signal (for example, the first signal) modulated by QPSK has better sensing performance. For example, if the first signal is used for sensing and communication, the first signal can be a data signal, which can realize sensing function and carry communication data (i.e., realize communication function), for example, the first signal can include first communication data.

[0119] Alternatively, the first signal can also have other implementation manners, which are not limited herein.

[0120] As an optional implementation, the first device can further transmit a communication signal on the third resource, which for example includes second communication data. The modulation order corresponding to the communication signal (or the second communication data) can be higher than the first threshold. Optionally, the second communication data can be associated with the first signal and / or a DMRS (to be described later), for example, the second communication data can be demodulated according to the channel estimation result of the first signal and / or the DMRS. The modulation order corresponding to the second communication data is higher than the first threshold, which means that the second communication data can be modulated by using a modulation mode corresponding to a higher modulation order, so as to improve the reliability of the second communication data. For example, the communication data transmitted by the first device is mainly the second communication data, so as to ensure the transmission rate of the data; and the first signal transmitted by the first device can be used for auxiliary communication, so as to improve the communication performance.

[0121] If the single station sensing mode is adopted in the embodiments of the present application, after the first device transmits the first signal, the first device can further receive a signal reflected, scattered or diffracted by a sensing target (or a scatterer) in the environment after the first signal, which is for example referred to as a return signal, or can also have other names. The sensing target is for example various tangible objects in the environment that can reflect electromagnetic waves, such as static objects such as mountains, forests or buildings, or movable objects such as vehicles, unmanned aerial vehicles, pedestrians or terminal devices, without limitation. After the first device receives the return signal, the first device can measure the return signal to obtain corresponding parameters, for example, including Doppler, time delay, distance and other information corresponding to the sensing target. In addition, if the first signal includes communication data, the second device can also receive the first signal, and the first signal received by the second device can be a signal directly sent from the first device without passing through the scatterer, and the second device can obtain the communication data from the received first signal. Optionally, if the first device further transmits a communication signal on the third resource, the second device can receive the communication signal on the third resource.

[0122] Alternatively, if the double station sensing mode is adopted in the embodiments of the present application, after the first device transmits the first signal, the second device can receive a return signal reflected, scattered or diffracted by a sensing target (or a scatterer) in the environment after the first signal. After the second device receives the return signal, the second device can perform sensing measurement through the return signal to obtain corresponding parameters, for example, including Doppler, time delay, distance and other information corresponding to the sensing target. In addition, if the first signal includes communication data, the second device can also receive the first signal directly sent from the first device, and this part of the first signal does not pass through the scatterer, and the second device can obtain the communication data from the received first signal. Optionally, if the first device further transmits a communication signal on the third resource, the second device can receive the communication signal on the third resource.

[0123] S702, the first device transmits the DMRS on the second resource, and correspondingly, the second device receives the DMRS on the second resource.

[0124] Optionally, S701 can occur before S702, or S701 can occur after S702, or S701 and S702 can occur at the same time.

[0125] In the embodiments of the present application, 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. In this way, not only can the resource collision be reduced, but also the first signal and the DMRS can be made to "surround" the communication signal (for example, communication data) as much as possible, thereby improving the accuracy of channel estimation.

[0126] Optionally, taking the frequency domain unit or the sub-carrier as an example, in one resource block, the second frequency domain resource occupies or includes k sub-carriers, and the first frequency domain resource does not overlap with the second frequency domain resource, and thus the number of sub-carriers occupied or included by the first frequency domain resource is less than or equal to 12-k sub-carriers. That is, in one resource block, the first frequency domain resource can occupy part or all of the sub-carriers except the sub-carriers occupied by the DMRS. For example, the number of sub-carriers occupied by the DMRS in one resource block is 6, and the first frequency domain resource can occupy part or all of the remaining 6 sub-carriers in the resource block. For example, the number of sub-carriers occupied by the first frequency domain resource can be equal to 12-k sub-carriers, that is, the first frequency domain resource can occupy more sub-carriers, which can improve the accuracy of channel estimation. Alternatively, the number of sub-carriers occupied by the first frequency domain resource can be less than 12-k sub-carriers, that is, the first frequency domain resource can occupy fewer sub-carriers, which can save the resource overhead of the first signal.

[0127] For example, for configuration type 1 and DMRS port 1 (please refer to FIG. 2A or 2B), the second frequency domain resource occupies 6 sub-carriers, which are sub-carrier 0, sub-carrier 2, sub-carrier 4, sub-carrier 6, sub-carrier 8 and sub-carrier 10. The first frequency domain resource does not overlap with the second frequency domain resource, and thus the first frequency domain resource can occupy part or all of sub-carrier 1, sub-carrier 3, sub-carrier 5, sub-carrier 7, sub-carrier 9 or sub-carrier 11 except the 6 sub-carriers. For example, please refer to FIG. 8A, which takes sub-carrier 1, sub-carrier 3, sub-carrier 5, sub-carrier 7, sub-carrier 9 and sub-carrier 11 as an example. For another example, please refer to FIG. 8B, which takes sub-carrier 1, sub-carrier 3, sub-carrier 7 and sub-carrier 9 as an example.

[0128] Optionally, the first frequency domain resource includes a plurality of sub-frequency domain resources, and the plurality of sub-frequency domain resources can be equally spaced in the frequency domain, or can not be equally spaced. If the plurality of sub-frequency domain resources are equally spaced in the frequency domain, it can be beneficial to improve the diversity gain.

[0129] Continuing with the above example, for configuration type 1 and DMRS port 1 (please refer to FIG. 2A or 2B), the second frequency domain resource occupies 6 subcarriers, which are subcarrier 0, subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8 and subcarrier 10, respectively. Then the first frequency domain resource can occupy some or all of subcarrier 1, subcarrier 3, subcarrier 5, subcarrier 7, subcarrier 9 or subcarrier 11 except the 6 subcarriers, and 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 subcarrier 1, subcarrier 3, subcarrier 5, subcarrier 7, subcarrier 9 and subcarrier 11. For another example, the first frequency domain resource can occupy subcarrier 1, subcarrier 5, subcarrier 9, etc.

[0130] In an optional implementation, the first time domain resource includes a plurality of time domain units, and the frequency domain interval of the first signal on any two time domain units is 2n sub-frequency domain resources, where n is a positive integer. Taking the sub-frequency domain resource as a subcarrier for example, for example, for DMRS configuration type 1, the frequency domain interval of the subcarriers occupied by the DMRS is 2 subcarriers, and the frequency domain interval of any two subcarriers included in the first frequency domain resource of the first signal can be 2n subcarriers, and any subcarrier included in the first frequency domain resource is different from the subcarrier occupied by the DMRS. Thus, the first frequency domain resource is frequency hopping distributed in the frequency domain, which is beneficial to obtain diversity gain. For example, referring to FIG. 9A, for DMRS port 1 of configuration type 1, the 6 subcarriers occupied by the DMRS are subcarrier 0, subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8 and subcarrier 10, respectively. Taking the first signal occupying subcarrier 1, subcarrier 3, subcarrier 5, subcarrier 7, subcarrier 9 and subcarrier 11 as an example, and the first frequency domain resource and the second frequency domain resource do not overlap, and the first time domain resource and the second time domain resource do not overlap, it can be seen that the frequency domain interval of the first signal on any two time domain units (for example, time domain symbols in FIG. 9A) can be 2n subcarriers.

[0131] For another example, please refer to FIG. 9B, for DMRS of configuration type 1 and single prefix, the 6 subcarriers occupied by the DMRS are subcarrier 0, subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8 and subcarrier 10, respectively. Taking the first signal occupying subcarrier 3, subcarrier 7 and subcarrier 11 as an example, and the first frequency domain resource and the second frequency domain resource do not overlap, and the first time domain resource and the second time domain resource do not overlap, it can be seen that the frequency domain interval of the first signal on any two time domain units (for example, time domain symbols in FIG. 9B) can be 2n subcarriers.

[0132] FIG. 9A and FIG. 9B are both examples in which no additional DMRS exists. For another example, please refer to FIG. 9C, which is a case of DMRS with configuration type 1, single pre-symbol, and including 3 groups of additional DMRS. The 6 subcarriers occupied by DMRS are subcarrier 0, subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8 and subcarrier 10 respectively. Taking an example of a first signal occupying subcarrier 1, subcarrier 3, subcarrier 5, subcarrier 7, subcarrier 9 and subcarrier 11, and the first frequency domain resource and the second frequency domain resource not overlapping, the first time domain resource and the second time domain resource not overlapping, it can be seen that the frequency domain interval of the first signal on any two time domain units (for example, time domain symbols in FIG. 9C) can be 2n subcarriers. For example, in FIG. 9C, the frequency domain interval of the first signal on the first time domain unit and the second time domain unit is 2 subcarriers. In addition, on the third time domain unit between the first time domain unit and the second time domain unit, there is a group of additional DMRS, and the blank box in FIG. 9C represents a communication signal for example. Through the scheme of the embodiments of the present application, the first signal and the DMRS can be made to “surround” the communication signal as much as possible, thereby improving the accuracy of channel estimation.

[0133] For another example, please refer to FIG. 9D, which is a case of DMRS with configuration type 1, double pre-symbol, and including 2 groups of additional DMRS. The 6 subcarriers occupied by DMRS are subcarrier 0, subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8 and subcarrier 10 respectively. Taking an example of a first signal occupying subcarrier 5, subcarrier 7, subcarrier 9 and subcarrier 11, and the first frequency domain resource and the second frequency domain resource not overlapping, the first time domain resource and the second time domain resource not overlapping, it can be seen that the frequency domain interval of the first signal on any two time domain units (for example, time domain symbols in FIG. 9D) can be 2n subcarriers. For example, in FIG. 9D, the frequency domain interval of the first signal on the first time domain unit and the second time domain unit is 2 subcarriers. In addition, on 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 a group of double-symbol additional DMRS. Through the scheme of the embodiments of the present application, the first signal and the DMRS can be made to “surround” the communication signal as much as possible, thereby improving the accuracy of channel estimation.

[0134] For example, referring to FIG. 17, for the case of configuration type 2, double-prefix DMRS, and a set of additional DMRS, the 6 subcarriers occupied by the DMRS are subcarrier 0, subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8, and subcarrier 10. Taking the case where the first signal occupies subcarrier 1, subcarrier 3, subcarrier 5, subcarrier 7, subcarrier 9, and subcarrier 11, and the first frequency domain resource and the second frequency domain resource do not overlap, and the first time domain resource and the second time domain resource do not overlap, it can be seen that the frequency domain interval of the first signal on any two time domain units (for example, time domain symbols in FIG. 17) can be 2n subcarriers. For example, in FIG. 17, the frequency domain interval of the first signal on the first time domain unit and the second time domain unit is 2 subcarriers. In addition, on the third time domain unit and the fourth time domain unit adjacent to the first time domain unit and the second time domain unit, there is a set of double-symbol additional DMRS. Through the scheme of the embodiments of the present application, the first signal and the DMRS can be made to "surround" the communication signal as much as possible, thereby improving the accuracy of channel estimation.

[0135] In an optional embodiment, the first time domain resource includes a plurality of time domain units, and the frequency domain interval of the first signal on any two time domain units is 4n sub-frequency domain resources, where n is a positive integer. Taking the case where the sub-frequency domain resource is a subcarrier as an example, for example, for DMRS configuration type 2, the frequency domain interval of the subcarriers occupied by the DMRS is 4 subcarriers, and the frequency domain interval of any two subcarriers included in the first frequency domain resource of the first signal can be 4n subcarriers, and any subcarrier included in the first frequency domain resource is different from the subcarrier occupied by the DMRS. Thus, the first frequency domain resource is frequency hopping distributed in the frequency domain, which is beneficial to obtain diversity gain. For example, referring to FIG. 10A, for configuration type 2 and DMRS port 1, the four subcarriers occupied by the DMRS are subcarrier 0, subcarrier 1, subcarrier 6, and subcarrier 7. Taking the case where the first signal occupies subcarrier 4 and subcarrier 8 as an example, and the first frequency domain resource and the second frequency domain resource do not overlap, and the first time domain resource and the second time domain resource do not overlap, it can be seen that the frequency domain interval of the first signal on any two time domain units (for example, time domain symbols in FIG. 10A) can be 4n subcarriers.

[0136] FIG. 10A takes the case of no additional DMRS as an example. For another example, please refer to FIG. 10B, which takes the case of type 2, single prefix DMRS, and including 3 groups of additional DMRS. The four subcarriers occupied by DMRS are subcarrier 0, subcarrier 1, subcarrier 6 and subcarrier 7. Taking the case that the first signal occupies subcarrier 4 and subcarrier 8, and the first frequency domain resource and the second frequency domain resource do not overlap, and the first time domain resource and the second time domain resource do not overlap, it can be seen that the frequency domain interval of the first signal on any two time domain units (for example, time domain symbols in FIG. 10B) can be 4n subcarriers. For example, in FIG. 10B, the frequency domain interval of the first signal on the first time domain unit and the second time domain unit is 4 subcarriers, and on the third time domain unit between the first time domain unit and the second time domain unit, there is a group of additional DMRS. The blank box in FIG. 10B represents a communication signal, for example. Through the scheme of the embodiments of the present application, the first signal and the DMRS can be made to “surround” the communication signal as much as possible, improving the accuracy of channel estimation.

[0137] For another example, please refer to FIG. 10C, which takes the case of type 2, double prefix DMRS, and including 2 groups of additional DMRS. The four subcarriers occupied by DMRS are subcarrier 0, subcarrier 1, subcarrier 6 and subcarrier 7. The frequency domain interval of the first signal on any two time domain units is 4 subcarriers. Taking the case that the first signal occupies subcarrier 4 and subcarrier 8, and the first frequency domain resource and the second frequency domain resource do not overlap, and the first time domain resource and the second time domain resource do not overlap, it can be seen that the frequency domain interval of the first signal on any two time domain units (for example, time domain symbols in FIG. 10C) can be 4n subcarriers. For example, in FIG. 10C, the frequency domain interval of the first signal on the first time domain unit and the second time domain unit is 4 subcarriers, and on 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 a group of additional DMRS. The blank box in FIG. 10C represents a communication signal, for example. Through the scheme of the embodiments of the present application, the first signal and the DMRS can be made to “surround” the communication signal as much as possible, improving the accuracy of channel estimation.

[0138] For another example, referring to FIG. 18, a case where type 2, double-prefix DMRS, and a set of additional DMRS exist is configured. The four subcarriers occupied by the DMRS are subcarrier 0, subcarrier 1, subcarrier 6, and subcarrier 7. The frequency domain interval of the first signal on any two time domain units is 4 subcarriers. Taking the case where the first signal occupies subcarrier 4 and subcarrier 8 as an example, and the first frequency domain resource and the second frequency domain resource do not overlap, and the first time domain resource and the second time domain resource do not overlap, it can be seen that the frequency domain interval of the first signal on any two time domain units (for example, time domain symbols in FIG. 18) can be 4n subcarriers. For example, in FIG. 18, the frequency domain interval of the first signal on the first time domain unit and the second time domain unit is 4 subcarriers, and on the third time domain unit and the fourth time domain unit, a set of additional DMRS exists. The blank boxes in FIG. 18 represent, for example, a communication signal. Through the scheme of the embodiments of the present application, the first signal and the DMRS can be made to "surround" the communication signal as much as possible, thereby improving the accuracy of channel estimation.

[0139] In an optional implementation, whether the plurality of sub-frequency domain resources included in the first frequency domain resource are equally spaced or unequally spaced in the frequency domain, the frequency domain interval of adjacent sub-frequency domain resources in the plurality of 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 interval of the adjacent sub-frequency domain resources. Wherein, the frequency domain interval can be default or pre-configured when the first device and the second device start communication, and the frequency domain interval can be adjusted in the process of communication between the first device and the second device. For example, for type 1 DMRS, the initial frequency domain interval of the first frequency domain resource is 2 subcarriers, which can be default; in the process of communication between the first device and the second device, the first device can indicate to adjust the frequency domain interval to 4 subcarriers through the first information. For another example, for type 2 DMRS, the initial frequency domain interval of the first frequency domain resource is 4 subcarriers, which can be default; in the process of communication between the first device and the second device, the first device can indicate to adjust the frequency domain interval to 8 subcarriers through the first information. Wherein, the above examples take the case where the plurality of sub-frequency domain resources included in the first frequency domain resource are equally spaced as an example; if the plurality of sub-frequency domain resources are unequally spaced, the first information can indicate one or more frequency domain intervals.

[0140] Alternatively, the frequency domain interval can be indicated by the first device when the first device and the second device start to communicate, and the frequency domain interval can be adjusted during the communication between the first device and the second device. For example, for the DMRS of type 1, when the first device and the second device initially communicate, the first device indicates the frequency domain interval as 2 subcarriers through the first information; during the communication between the first device and the second device, the first device can indicate to adjust the frequency domain interval to 4 subcarriers through another first information.

[0141] Exemplarily, the first information can be included in high layer signaling or physical layer signaling, for example, including radio resource control (RRC) signaling or media access control (MAC) control element (CE), etc. The first information can be sent through broadcasting, groupcasting or unicasting, etc., and the embodiments of the present application do not limit this.

[0142] Optionally, for example, the second time domain resource occupies or includes p time domain units on one sub-frequency domain unit, and the first time domain resource and the second time domain resource do not overlap, then the first time domain resource occupies or includes a number of time domain units on one sub-frequency domain unit, which is less than or equal to z-p time domain units, where the z-p time domain units can be continuous or discontinuous in time domain. Taking the time domain unit as a time domain symbol for example, z is for example the total number of time domain symbols included in one time slot; or taking the time domain unit as a time slot for example, z is for example the total number of time slots included in one subframe, and so on. Z can be the total number of time domain units included in the time unit including the time domain unit, or the time domain unit can also be referred to as the sub-time unit. Z and p are positive integers, and p is less than or equal to z. It can be understood that, in one time unit, the first time domain resource can occupy part or all of the time domain units on one sub-frequency domain unit except the time domain units occupied by the DMRS. Taking the time unit as a time slot and the time domain unit as a time domain symbol for example, and taking the time slot including 14 time domain symbols for example, for example, the number of time domain units occupied by the DMRS on one sub-frequency domain unit in one time unit is 1, then the first time domain resource can occupy part or all of the remaining 13 time domain symbols in the time unit, and the time domain symbols occupied by the first time domain resource can be continuous or discontinuous in time domain.

[0143] Optionally, the number of time domain units occupied or included by the first time domain resource on different sub-frequency domain units can be the same or different; the time domain positions of the time domain units occupied or included by the first time domain resource on different sub-frequency domain units can be the same or different. On one sub-frequency domain unit, the time domain units occupied or included by the first time domain resource are different from the time domain units occupied or included by the second time domain resource; and / or, on different sub-frequency domain units, the time domain units occupied or included by the first time domain resource are different from the time domain units occupied or included by the second time domain resource.

[0144] For example, for the configuration type 1, single front symbol DMRS shown in FIG. 8A, the second time domain resource occupies 1 time domain unit, the first time domain resource does not overlap with the second time domain resource, and the first time domain resource can occupy part or all of the time domain units other than the 1 time domain unit. For example, as shown in FIG. 11A, taking a time unit as a time slot and a time domain unit as a time domain symbol, the first time domain resource can include three discrete time domain symbols. Alternatively, as shown in FIG. 11B, the first time domain resource can include all time domain symbols within a time slot that do not overlap with the second time domain resource.

[0145] For example, for the configuration type 1, single front symbol DMRS, and 3 groups of additional DMRS shown in FIG. 9C, taking a time unit as a time slot and a time domain unit as a time domain symbol, the second time domain resource occupies 4 time domain symbols, the first time domain resource does not overlap with the second time domain resource, and the case that the first time domain resource occupies time domain units can be as shown in FIG. 11C. In FIG. 11C, 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, and the position and / or number of the first time domain resource can not be limited.

[0146] In the foregoing FIG. 8A, FIG. 8B, FIG. 9A-FIG. 9D, FIG. 10A-FIG. 10C, and FIG. 11A-FIG. 11C, a time unit is taken as a time slot and a time domain unit is taken as a time domain symbol, and one time slot includes 12 time domain symbols. If the number of time domain symbols included in one time slot changes, for example, one time slot includes 14 time domain symbols, the implementation is similar.

[0147] In an optional implementation, the transmission power of the first signal can be greater than the transmission power of the communication signal (for example, the communication signal transmitted by the first device through the third resource in S701). It can be understood that the first device can amplify or increase the transmission power of the first signal. Since the first signal can be used for channel estimation, a certain degree of power boost is performed on the first signal, which can improve the accuracy of channel estimation.

[0148] Additionally, the transmission power of the DMRS can also 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 an optional manner, the transmission power of the first signal (e.g., the transmission power of the first signal after boosting) can be less than or equal to the transmission power of the DMRS (e.g., the transmission power of the DMRS after boosting). For example, the initial transmission power of the first signal is the same as the initial transmission power of the DMRS, and the maximum boosting value of the transmission power of the DMRS is usually 3 decibels (dB), so when the first signal is boosted, the boosting value of the transmission power of the first signal can be less than or equal to the maximum boosting value of the transmission power of the DMRS, for example, less than or equal to 3 dB, and finally the transmission power of the first signal is less than or equal to the transmission power of the DMRS. Optionally, if the initial transmission power of the first signal is different from the initial transmission power of the DMRS, the boosting value of the transmission power of the first signal can be determined as appropriate, and the final transmission power of the first signal can be less than or equal to the transmission power of the DMRS. Through the scheme of the embodiments of the present application, the transmission power of the first signal can be boosted to a certain extent, the accuracy of channel estimation can be improved, and the communication performance can be improved.

[0149] In an embodiment, the first device can transmit other reference signals in addition to the first signal and the DMRS. For example, the first device can transmit a first reference signal. The first reference signal can include one or more of a phase tracking reference signal (PTRS), a channel state information-reference signal (CSI-RS), a positioning reference signal (PRS), or the like. The first reference signal can be transmitted on a fourth resource. The first resource for transmitting the first signal can or can not overlap with the fourth resource (e.g., partially overlap or fully overlap). For example, when the first reference signal is a PTRS, the first signal can partially or fully overlap with the first reference signal because the PTRS can also be transmitted with a communication signal. For example, the fourth resource includes a third time domain resource and a third frequency domain resource, and the first resource overlapping with the fourth resource can include the third time domain resource partially or fully overlapping with the first time domain resource, and / or the third frequency domain resource partially or fully overlapping with the first frequency domain resource. Optionally, if the first resource overlaps with the fourth resource, the first device can not transmit the first reference signal, e.g., the first device drops the first reference signal to reduce interference between the signals and to prioritize transmission of the first signal to improve sensing performance and communication performance. Alternatively, if the first resource fully overlaps with the fourth resource, the first device can not transmit the first reference signal, and if the first resource partially overlaps with the fourth resource, the first device can not transmit the part of the first reference signal carried on the overlapping resource, but can still transmit the part of the first reference signal not carried on the overlapping resource to improve sensing performance and communication performance while also improving the transmission success rate of the first reference signal.

[0150] S703, the second device performs channel estimation according to the first signal and the DMRS.

[0151] The second device receives the DMRS and the first signal, and can perform channel estimation according to the first signal and the DMRS. The accuracy of channel estimation can be improved because the first signal is used for channel estimation. The second device performs equalization on the received information according to the channel estimation result of the DMRS and the first signal to remove the influence of channel distortion on information transmission.

[0152] In addition, if the embodiment of the present application adopts a bistatic sensing mode, the second device can also receive an echo signal of the first signal, and the second device can perform sensing according to the first signal and the echo signal to obtain corresponding parameters, for example, including Doppler, time delay, distance, and other information corresponding to the sensing target. Alternatively, if the embodiment of the present application adopts a monostatic sensing mode, the first device can also receive an echo signal of the first signal, and the first device can perform sensing according to the first signal and the echo signal to obtain corresponding parameters, for example, including Doppler, time delay, distance, and other information corresponding to the sensing target.

[0153] FIG. 12 is a schematic diagram of a comparison of communication performance of the scheme of the embodiment of the present application and other schemes. In FIG. 12, the first signal is represented as SeRS, the horizontal axis is the signal-to-noise ratio (SNR) in decibels (dB), and the vertical axis is the block error rate (BLER). As shown in FIG. 12, the SeRS pattern can improve the communication performance depending on the DMRS design (for example, SeRS and DMRS occupy the same subcarrier, or SeRS and DMRS occupy different subcarriers). According to FIG. 12, if SeRS and DMRS occupy different subcarriers, a lower block error rate (BLER) can be obtained under the same SNR. As can be seen, better communication performance can be obtained when SeRS and DMRS occupy different subcarriers, and therefore, the embodiment of the present application makes the frequency domain resources of SeRS and DMRS different. In FIG. 12, the NR baseline refers to the block error rate corresponding to the case where there is DMRS but no SeRS.

[0154] In the embodiment of the present application, for example, both the first signal and the DMRS can be used for channel estimation, which is equivalent to adding the first signal for channel estimation on the basis of the DMRS, thereby improving the accuracy of channel estimation and improving the communication performance. The first signal can also be used for sensing, thereby improving both the communication performance and the sensing performance. In addition, the resources occupied by the first signal and the resources occupied by the DMRS do not overlap, which can reduce resource collision. Furthermore, the resources occupied by the first signal and the resources occupied by the DMRS do not overlap, which is beneficial to making the first signal and the DMRS "surround" the communication signal, and can improve the accuracy of channel estimation.

[0155] In the embodiments of this application, the method provided by the embodiments of this application is introduced from the perspective of interaction of multiple communication devices (for example, the first device and the second device). The steps performed by the communication device (for example, the first device or the second device) can be implemented by different functional entities that make up the communication device. The communication device (for example, the first device or the second device) can include hardware structures and / or software modules to implement the above functions in the form of hardware structures, software modules, or hardware structures plus software modules. Whether a certain function in the above functions is implemented in the form of hardware structure, software module, or hardware structure plus software module depends on the specific application of the technical solution and the design constraint conditions.

[0156] 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 in the foregoing can be used in the subsequent embodiments, and the repeated content will not be described again.

[0157] FIG. 13 exemplarily shows a structural schematic diagram of a device 1300. The device 1300 can implement the functions or steps implemented by the first device or the second device in the above method embodiments.

[0158] Exemplarily, when the device 1300 is used to implement the functions or steps implemented by the first device in the above method embodiments, the device 1300 can be a network device or a component (such as a DU and / or RU, etc.) in a network device, or can also be a terminal device or a component in a terminal device.

[0159] Exemplarily, when the device 1300 is used to implement the functions or steps implemented by the second device in the above method embodiments, the device 1300 can be a network device or a component (such as a DU and / or RU, etc.) in a network device, or can also be a terminal device or a component in a terminal device.

[0160] In an implementation manner, the device 1300 can include a processing module 1301 and a transceiver module 1302. The processing module 1301 can be used for data processing, for example, executing the above method embodiments. The processing module 1301 can also be referred to as a processing unit, etc. The transceiver module 1302 can be used to implement the corresponding communication function, for example, receiving or sending related data, information or messages. The transceiver module 1302 can also be referred to as a communication interface, or a communication module, or a transceiver unit, etc.

[0161] The device 1300 can include the processing module 1301 and does not include the transceiver module 1302. Alternatively, the device 1300 can include the transceiver module 1302 and does not include the processing module 1301. Whether the device 1300 includes the processing action and the transceiver action in the above scheme can be determined according to the specific application of the device 1300.

[0162] Optionally, the apparatus 1300 further includes a storage module, not shown in FIG. 13. The storage module can be used to store instructions and / or data. The processing module 1301 can read the instructions and / or data in the storage module, so that the apparatus 1300 implements the foregoing method embodiments.

[0163] Optionally, the transceiver module 1302 can include a sending module and a receiving module. The sending module is configured to perform the sending operations in the foregoing method embodiments. The receiving module is configured to perform the receiving operations in the foregoing method embodiments.

[0164] Optionally, the apparatus 1300 can include the sending module but not the receiving module. Alternatively, the apparatus 1300 can include the receiving module but not the sending module. Specifically, whether the apparatus 1300 includes the sending module and the receiving module depends on whether the apparatus 1300 performs the sending action and the receiving action in the foregoing schemes.

[0165] Optionally, the apparatus 1300 is a chip system, and the transceiver module 1302 can be an input / output interface of a chip (e.g., a baseband chip), and the processing unit can be a processor of the chip system.

[0166] In the first implementation, the apparatus 1300 can implement the functions of the first apparatus, and perform the following: the processing module 1301 is configured to determine a first resource and a second resource; and the transceiver module 1302 is configured to transmit a first signal in the first resource, the first signal being used for sensing or both sensing and communication, the first resource including a first time domain resource and a first frequency domain resource; and transmit a DMRS in the second resource, the second resource including 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.

[0167] Optionally, the first signal is used for sensing and communication, wherein the first signal includes first communication data, and a modulation order corresponding to the first signal is lower than or equal to a first threshold.

[0168] 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 a modulation order corresponding to the communication signal being higher than the first threshold.

[0169] Optionally, a transmission power of the first signal is greater than a transmission power of the communication signal and less than or equal to a transmission power of the DMRS.

[0170] Optionally, the first frequency domain resource includes a plurality of sub-frequency domain resources, and the plurality of sub-frequency domain resources are equally spaced in the frequency domain.

[0171] Optionally, the first time domain resource includes a plurality of time domain units, and a frequency domain interval of the first signal on any two time domain units is 2n or 4n, n being a positive integer.

[0172] Optionally, the transceiver 1302 is further configured to transmit first information, the first information being used to update a frequency domain interval of adjacent sub-frequency domain resources in the plurality of sub-frequency domain resources.

[0173] Optionally, within one resource block, the second frequency domain resource occupies k subcarriers, and the first frequency domain resource occupies a number of subcarriers less than or equal to 12-k subcarriers.

[0174] Optionally, the first resource overlaps with a fourth resource, and the fourth resource is used to carry a first reference signal, and the transceiver 1302 is further configured to determine not to transmit the first reference signal, the first reference signal including one or more of: a phase tracking reference signal, a channel state information reference signal, or a positioning reference signal.

[0175] In the second implementation, the apparatus 1300 can implement the functions of the second device, and perform the following: the transceiver 1302 is configured to receive a first signal at a first resource, the first signal being used for sensing or both sensing and communication, the first resource including a first time domain resource and a first frequency domain resource; and receive a DMRS at a second resource, the second resource including 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.

[0176] Optionally, the first signal is used for sensing and communication, wherein the first signal includes first communication data, and a modulation order corresponding to the first signal is less than or equal to a first threshold.

[0177] Optionally, the transceiver 1302 is further configured to receive a communication signal at a third resource, the communication signal including second communication data, and a modulation order corresponding to the communication signal being greater than the first threshold.

[0178] Optionally, a transmission power of the first signal is greater than a transmission power of the communication signal, and less than or equal to a transmission power of the DMRS.

[0179] Optionally, the first frequency domain resource includes a plurality of sub-frequency domain resources, and the plurality of sub-frequency domain resources are equally spaced in the frequency domain.

[0180] Optionally, the first time domain resource includes a plurality of time domain units, and a frequency domain interval of the first signal in any two time domain units is 2n or 4n, n being a positive integer.

[0181] Optionally, the transceiver 1302 is further configured to receive first information, the first information being used to update a frequency domain interval of adjacent sub-frequency domain resources in the plurality of sub-frequency domain resources.

[0182] Optionally, within one resource block, the second frequency domain resource occupies k subcarriers, and the first frequency domain resource occupies a number of subcarriers less than or equal to 12-k subcarriers.

[0183] Optionally, the processing module 1301 is specific for performing channel estimation according to the first signal and the DMRS.

[0184] As shown in FIG. 14, the embodiment of the present application provides another structure diagram of an apparatus 1400. The apparatus 1400 can include a processor 1420, which is configured to implement or support implementing the functions of the first apparatus or the second apparatus in any of the method embodiments of the present application. For details, refer to previous description in the method embodiments, which are not repeated here. For example, the processor 1420 is configured to read and execute program instructions through a communication interface, so that the apparatus 1400 implements the corresponding method. The processor 1420 can include one or more processors, which are not limited.

[0185] The above-mentioned function modules can be implemented by hardware, or by combination of hardware and software, which are not limited. When the apparatus 1400 only includes the processor 1420, the apparatus 1400 can be a chip, or also can be a chip system.

[0186] For example, the apparatus 1400 can be a chip system. The chip system can be composed of a chip, or can include a chip and other discrete devices, which are not limited.

[0187] Optionally, the apparatus 1400 can further include a memory 1430, which is configured to store program instructions and / or data. The memory 1430 is coupled with the processor 1420. The coupling can be understood as indirect coupling or communication connection between apparatuses, units or modules, which can be electrical, mechanical or other forms, and is used for information interaction between apparatuses, units or modules. The processor 1420 can operate in cooperation with the memory 1430. The processor 1420 and the memory 1430 can be integrated together, or can be separately arranged.

[0188] Further, the processor 1420 is configured to execute program instructions stored in the memory 1430, so that the apparatus 1400 implements the corresponding method.

[0189] One or more of the memories in the memory 1430 can be included in the processor. The memory 1430 can also exist independently, for example, an off-chip memory, which is connected with the processor 1420 through a communication bus (represented by thick line 1440 in FIG. 14). The memory 1430 and the processor 1420 can also be integrated together.

[0190] Optionally, the apparatus 1400 further includes a communication interface 1410 (shown in dashed line in FIG. 14) for communicating with other devices through transmission medium, so that the apparatus in the apparatus 1400 can communicate with other devices. Exemplarily, when the communication apparatus is a first apparatus, the other device can be a second apparatus, etc. The processor 1420 can transceive data by using the communication interface 1410. For example, the processor 1420 can be configured to control the communication interface 1410 to receive and / or send signals.

[0191] The communication interface 1410 can be a transceiver. In hardware implementation, the transceiver can be configured to implement the functions of the transceiving module 1302, and the transceiver is integrated in the apparatus 1400 to form the communication interface 1410.

[0192] The communication interface 1410 can have a sending function and a receiving function, and can realize signal receiving and sending; or the communication interface 1410 can have a sending function and does not have a receiving function, and is configured to realize signal sending; or the communication interface 1410 can have a receiving function and does not have a sending function, and is configured to realize signal receiving.

[0193] In the embodiments of the present application, the specific connection medium between the communication interface 1410, the processor 1420 and the memory 1430 is not limited. In FIG. 14, the memory 1430, the processor 1420 and the communication interface 1410 are connected through the communication bus 1440, and the connection mode between other components is only illustrative and is not limited. The communication bus 1440 can be divided into an address bus, a data bus, a control bus, etc. For convenience of representation, only one thick line is shown in FIG. 14, but it does not mean that there is only one communication bus or only one type of communication bus.

[0194] In the embodiments of the present application, the processor 1420 can be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. The general-purpose processor can be a microprocessor or any conventional processor, etc. The method disclosed in the embodiments of the present application can be executed by hardware in the processor or by a combination of hardware and software in the processor.

[0195] In the embodiments of the present application, the memory 1430 can be a non-volatile memory such as a hard disk drive (HDD) or a solid-state drive (SSD), and can also be a volatile memory such as a random-access memory (RAM). The memory can also be any other medium for carrying or storing program codes in the form of instructions or data structures and capable of being accessed by a computer; or a circuit or any other device capable of realizing a storage function for storing program instructions and / or data.

[0196] In a first possible implementation, the apparatus 1400 can be a first device, configured to implement the method related to the first device in the above various embodiments, and the specific functions can be referred to the descriptions in the above various embodiments.

[0197] For example, the method related to the first device in the above various embodiments 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; and 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 does not overlap with the second time domain resource, and the first frequency domain resource does not overlap with the second frequency domain resource.

[0198] In a second possible implementation, the apparatus 1400 can be a second device, configured to implement the method related to the second device in the above various embodiments, and the specific functions can be referred to the descriptions in the above various embodiments.

[0199] For example, the method related to the second device in the above various embodiments 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; and 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 does not overlap with the second time domain resource, and the first frequency domain resource does not overlap with the second frequency domain resource.

[0200] For the implementation process, please refer to the related content in the above various embodiments, which will not be repeated here.

[0201] Based on the same concept, referring to FIG. 15, the embodiment of the present application further provides another device 1500, comprising: an input / output interface 1510 and a logic circuit 1520; the input / output interface 1510 is configured to receive code instructions and transmit the code instructions to the logic circuit 1520; the logic circuit 1520 is configured to run the code instructions to perform the method performed by the first device or the second device in any of the above-mentioned embodiments.

[0202] In the first implementation, the device 1500 can be applied to the first device to perform the method performed by the first device, for example, the method performed by the first device in the above-mentioned method embodiments. For example, the device 1500 can transmit a first signal in a first resource, the first signal is used for sensing, or the first signal is used for sensing and communication, the first resource comprises a first time domain resource and a first frequency domain resource; transmit a DMRS in a second resource, the second resource comprises 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.

[0203] In the second implementation, the device 1500 can be applied to the second device to perform the method performed by the second device, for example, the method performed by the second device in the above-mentioned method embodiments. For example, the device 1500 can receive a first signal in a first resource, the first signal is used for sensing, or the first signal is used for sensing and communication, the first resource comprises a first time domain resource and a first frequency domain resource; receive a DMRS in a second resource, the second resource comprises 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] The embodiment of the present application further provides a system, which can comprise one or more of the first device or the second device. Wherein, the first device or the second device can refer to the description in the above-mentioned method embodiments, and will not be repeated here.

[0205] The embodiment of the present application further provides a computer readable storage medium, comprising program instructions, when the program instructions are run on a computer, the computer is caused to perform the method or steps of the first device or the second device in the above-mentioned embodiments.

[0206] The embodiment of the present application further provides a computer program product, comprising program instructions, when the program instructions are run on a computer, the computer is caused to perform the method or steps of the first device or the second device in the above-mentioned embodiments.

[0207] The embodiment of the present application provides a chip system, which comprises a processor for realizing the functions of the first device or the second device in the above-mentioned method (for example, performing corresponding methods or steps). The chip system can be composed of a chip, or can contain a chip and other discrete devices.

[0208] Optionally, the chip system further comprises a memory for storing program instructions, so that the processor reads and executes the program instructions to implement the corresponding method.

[0209] It should be understood that the size of the sequence number of the above processes in various embodiments of the present application does not mean the order of execution, and the execution order of the processes should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0210] Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0211] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0212] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the above-described device embodiments are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0213] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0214] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically, or two or more units can be integrated into one unit.

[0215] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the part of the technical solutions of the present application that essentially contributes or the part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0216] The above is only a specific implementation of the present application, but the protection scope of the embodiments of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the embodiments of the present application, which should be covered within the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application should be subject to the protection scope of the claims.

Claims

1. A signal transmission method, characterized by, The method comprises: transmitting a first signal on 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; transmitting a demodulation reference signal (DMRS) on a second resource, the second resource comprising 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 of claim 1, wherein, The first signal is used for sensing and communication, wherein the first signal comprises first communication data, and a modulation order corresponding to the first signal is lower than or equal to a first threshold.

3. The method of claim 1 or 2, wherein, The method further comprises: transmitting a communication signal on a third resource, the communication signal comprising second communication data, and a modulation order corresponding to the communication signal being higher than the first threshold.

4. The method of claim 3, wherein, A transmission power of the first signal is greater than a transmission power of the communication signal, and is less than or equal to a 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 comprises a plurality of sub-frequency domain resources, and the plurality of sub-frequency domain resources are equally spaced in the frequency domain.

6. The method of claim 5, wherein, The first time domain resource comprises a plurality of time domain units, and a frequency domain interval of the first signal on any two time domain units is 2n or 4n, n being a positive integer.

7. The method of claim 5 or 6, wherein, The method further comprises: transmitting first information, the first information being used for updating a frequency domain interval of adjacent sub-frequency domain resources in the plurality of sub-frequency domain resources.

8. The method according to any one of claims 1 to 7, characterized in that, In one resource block, the second frequency domain resource occupies k subcarriers, and a 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 a fourth resource, and the fourth resource is used to carry a first reference signal, the method further comprising: determining not to transmit the first reference signal, the first reference signal comprising one or more of: a phase tracking reference signal, a channel state information reference signal, or a positioning reference signal.

10. A signal transmission method, characterized by, The method comprises: receiving a first signal on 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; receiving a DMRS on a second resource, the second resource comprising 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 of claim 10, wherein, The first signal is used for sensing and communication, wherein the first signal comprises first communication data, and a modulation order corresponding to the first signal is lower than or equal to a first threshold.

12. The method of claim 10 or 11, wherein, The method further comprises: receiving a communication signal on a third resource, the communication signal comprising second communication data, and a modulation order corresponding to the communication signal being higher than the first threshold.

13. The method of claim 12, wherein, A transmission power of the first signal is greater than a transmission power of the communication signal, and is less than or equal to a 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 comprises a plurality of sub-frequency domain resources, and the plurality of sub-frequency domain resources are equally spaced in the frequency domain.

15. The method of claim 14, wherein, The first time domain resource comprises a plurality of time domain units, and a frequency domain interval of the first signal on any two time domain units is 2n or 4n, n being a positive integer.

16. The method of claim 14 or 15, wherein, The method further comprises: receiving first information, the first information being used to update a frequency domain interval of adjacent sub-frequency domain resources in the plurality of sub-frequency domain resources.

17. The method of any one of claims 10 to 16, wherein, The second frequency domain resource occupies k subcarriers within one resource block, and the first frequency domain resource occupies a number of subcarriers less than or equal to 12-k subcarriers.

18. The method of any one of claims 10 to 17, wherein, The method further comprises: performing channel estimation according to the first signal and the DMRS.

19. An apparatus, comprising: The apparatus comprises a processing unit and a transceiving unit, the processing unit being coupled with the transceiving unit to perform the method of any one of claims 1-9, or to perform the method of any one of claims 10-18.

20. An apparatus comprising: The apparatus comprises a processor and a memory, the memory being used to store a computer program, and the processor being used to execute the computer program stored on the memory, so that the apparatus performs the method of any one of claims 1-9, or so that the apparatus performs the method of any one of claims 10-18.

21. A computer-readable storage medium, characterized in that, The computer program product comprises a computer program, when the computer program is run on a computer, so that the method of any one of claims 1-9, or the method of any one of claims 10-18 is implemented.

22. A computer program product, characterised in that, The computer program product comprises a computer program, when the computer program is run on a computer, so that the method of any one of claims 1-9, or the method of any one of claims 10-18 is implemented.

23. A chip system, characterized by The chip system comprises: a processor and an interface, the processor being used to call and run instructions from the interface, when the processor executes the instructions, the method of any one of claims 1-9 is implemented, or the method of any one of claims 10-18 is implemented.

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