Pilot frequency configuration method, device and equipment and computer readable storage medium

Abstract

The invention provides a pilot frequency configuration method, device and equipment and a computer readable storage medium. The method comprises: a first device receiving at least one set of pilot configuration, the pilot configuration comprising a resource configuration of pilot signals in a time-frequency domain and / or a sequence configuration of the pilot signals, a target pilot signal in the pilot signals being used as a DMRS of a physical channel, the DMRS corresponding to the physical channel being transmitted through at least one DMRS port, and the DMRS corresponding to the physical channel being transmitted through at least one DMRS port; the at least one set of pilot frequency configuration is in one-to-one correspondence with the at least one DMRS port.

Description

Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a pilot configuration method, apparatus, device, and computer-readable storage medium. Background Art

[0002] Integrated sensing and communication (ISAC) integrates the dual functions of communication and perception. In order to optimize the two functions, the perception function can be realized through the orthogonal time frequency space (OTFS) modulation waveform, and the communication function can be realized through the orthogonal frequency-division multiplexing (OFDM) waveform. In addition, the ISAC system can also support multiple ports. In this case, how to perform multi-port mapping of pilot signals is also an urgent problem to be solved. Summary of the invention

[0003] The present application provides a pilot configuration method, apparatus, device and computer-readable storage medium, which can implement multi-port mapping of pilot signals by indicating corresponding pilot configurations for different ports.

[0004] In a first aspect, a pilot configuration method is provided, including:

[0005] The first device receives at least one set of pilot configurations, wherein the pilot configuration includes resource configuration of the pilot signal in the time-frequency domain and / or sequence configuration of the pilot signal, the target pilot signal in the pilot signal serves as the DMRS of the physical channel, the DMRS corresponding to the physical channel is transmitted through at least one DMRS port, and the at least one set of pilot configurations corresponds one-to-one to the at least one DMRS port.

[0006] In a second aspect, a pilot configuration method is provided, including:

[0007] The second device sends at least one set of pilot configurations, wherein the pilot configuration includes resource configuration of the pilot signal in the time-frequency domain and / or sequence configuration of the pilot signal, the target pilot signal in the pilot signal serves as the DMRS of the physical channel, the DMRS corresponding to the physical channel is transmitted through at least one DMRS port, and the at least one set of pilot configurations corresponds one-to-one to the at least one DMRS port.

[0008] In a third aspect, a pilot configuration method is provided, including:

[0009] The first device receives at least one set of pilot configurations, wherein the pilot configuration includes a configuration of a pilot signal in a delayed Doppler domain and / or a sequence configuration of a pilot signal, the pilot signal serves as a perception signal, the perception signal is transmitted through at least one port, and the at least one set of pilot configurations corresponds to the at least one port in a one-to-one manner.

[0010] In a fourth aspect, a pilot configuration method is provided, including:

[0011] The second device sends at least one set of pilot configurations, wherein the pilot configuration includes a configuration of a pilot signal in a delayed Doppler domain and / or a sequence configuration of a pilot signal, the pilot signal serves as a perception signal, the perception signal is transmitted through at least one port, and the at least one set of pilot configurations corresponds one-to-one to the at least one port.

[0012] In a fifth aspect, a pilot configuration device is provided, including:

[0013] A communication unit, used to receive at least one set of pilot configurations, wherein the pilot configuration includes resource configuration of the pilot signal in the time-frequency domain and / or sequence configuration of the pilot signal, a target pilot signal in the pilot signal is used as a DMRS of a physical channel, the DMRS corresponding to the physical channel is transmitted through at least one DMRS port, and the at least one set of pilot configurations corresponds to the at least one DMRS port one-to-one.

[0014] In a sixth aspect, a pilot configuration device is provided, including:

[0015] A communication unit, used to send at least one set of pilot configurations, wherein the pilot configuration includes resource configuration of the pilot signal in the time-frequency domain and / or sequence configuration of the pilot signal, a target pilot signal in the pilot signal is used as a DMRS of a physical channel, the DMRS corresponding to the physical channel is transmitted through at least one DMRS port, and the at least one set of pilot configurations corresponds to the at least one DMRS port one-to-one.

[0016] In a seventh aspect, a pilot configuration device is provided, including:

[0017] A communication unit is used to receive at least one set of pilot configurations, wherein the pilot configuration includes a configuration of a pilot signal in a delayed Doppler domain and / or a sequence configuration of a pilot signal, the pilot signal is used as a perception signal, the perception signal is transmitted through at least one port, and the at least one set of pilot configurations corresponds to the at least one port one-to-one.

[0018] In an eighth aspect, a pilot configuration device is provided, including:

[0019] A communication unit, used to send at least one set of pilot configurations, wherein the pilot configuration includes a configuration of a pilot signal in a delayed Doppler domain and / or a sequence configuration of a pilot signal, the pilot signal is used as a perception signal, the perception signal is transmitted through at least one port, and the at least one set of pilot configurations corresponds to the at least one port one-to-one.

[0020] In the ninth aspect, a communication device is provided, comprising a processor and a memory; wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the methods in the above-mentioned first to fourth aspects or their respective implementation methods.

[0021] In a tenth aspect, a chip is provided for implementing the method in any one of the first to fourth aspects or its respective implementations. Specifically, the chip includes: a processor for calling and running a computer program from a memory, so that a device equipped with the chip executes the method in any one of the first to fourth aspects or its respective implementations.

[0022] In the eleventh aspect, a computer-readable storage medium is provided for storing a computer program, wherein the computer program enables a computer to execute the method in any one of the first to fourth aspects or any of its implementations.

[0023] In the twelfth aspect, a computer program / program product is provided, wherein the computer program / program product is stored in a storage medium, and the computer program / program product enables at least one processor to execute the method in any aspect of the first to fourth aspects above or in each of its implementations.

[0024] In an embodiment of the present application, for a receiving device with a communication function, a second device (i.e., a transmitting device of a pilot configuration) can indicate at least one set of pilot configurations to a first device (i.e., a receiving device of a pilot configuration, and also a receiving device of a pilot signal), and the at least one set of pilot configurations corresponds to at least one DMRS port associated with a physical channel. Furthermore, the first device can use the time-frequency domain pilot signal sent based on at least one set of pilot configurations as the DMRS of a physical channel for channel estimation, thereby realizing a communication function.

[0025] In an embodiment of the present application, for a receiving device with a perception function, the second device (i.e., a transmitting device of a pilot configuration) can indicate at least one set of pilot configurations to the first device (i.e., a receiving device of a pilot configuration, which is also a receiving device of a pilot signal), and the at least one set of pilot configurations corresponds to at least one port. Furthermore, the first device can use a Doppler domain transform signal of a time-frequency domain pilot signal sent based on at least one set of pilot configurations as a perception signal, thereby realizing the perception function. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of a communication system architecture provided in an embodiment of the present application.

[0027] Figure 2 This is the flow chart of OTFS implementation based on OFDM system.

[0028] Figure 3 It is a schematic diagram of the correlation conversion between delay Doppler domain and time-frequency domain.

[0029] Figure 4 It is a schematic diagram of resource multiplexing of perception pilot and data in TF domain.

[0030] Figure 5 It is a schematic diagram of time-frequency domain transformation corresponding to a pilot configuration provided in an embodiment of the present application.

[0031] Figure 6 It is a schematic diagram of time-frequency domain transformation corresponding to another pilot configuration provided in an embodiment of the present application.

[0032] Figure 7 It is a schematic diagram of the time-frequency domain transformation corresponding to the two pilot configurations provided in the embodiment of the present application.

[0033] Figure 8 This is a schematic interaction of a pilot configuration method provided in an embodiment of the present application.

[0034] Fig. 9 It is a schematic interactive diagram of a pilot configuration method provided in an embodiment of the present application.

[0035] Fig.10 It is a schematic block diagram of a pilot configuration device provided in an embodiment of the present application.

[0036] Fig.11 It is a schematic diagram and block diagram of another pilot configuration device provided in an embodiment of the present application.

[0037] Fig.12 It is a schematic block diagram of another pilot configuration device provided in an embodiment of the present application.

[0038] Fig.13 It is a schematic diagram and block diagram of another pilot configuration device provided in an embodiment of the present application.

[0039] Fig.14 It is a schematic structural diagram of a communication device provided in an embodiment of the present application.

[0040] Fig.15 It is a schematic structural diagram of a chip provided in an embodiment of the present application.

[0041] Fig.16It is a schematic diagram of the hardware structure of a terminal provided in an embodiment of the present application.

[0042] Fig.17 It is a schematic diagram of the hardware structure of a network side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0044] The terms "first", "second", etc. of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of one type, and the number of objects is not limited, for example, the first object can be one or more. In addition, "or" in the present application represents at least one of the connected objects. For example, "A or B" covers three schemes, namely, Scheme 1: including A but not including B; Scheme 2: including B but not including A; Scheme 3: including both A and B. The character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0045] The term "indication" in this application can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, operations to be performed, or request results in the sent indication; an indirect indication can be understood as the receiver determining the corresponding information according to the indication sent by the sender, or making a judgment and determining the operation to be performed or the request result according to the judgment result.

[0046] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and the NR terminology is used in most of the following descriptions, but these technologies can also be applied to systems other than NR systems, such as the 6th generation (6 th Generation, 6G) communication system.

[0047] Figure 1A block diagram of a wireless communication system applicable to an embodiment of the present application is shown. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (Ultra-mobile Personal Computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (Augmented Reality, AR), a virtual reality (Virtual Reality, VR) device, a robot, a wearable device (Wearable Device), an aircraft (flight vehicle), a vehicle-mounted device (Vehicle User Equipment, VUE), a ship-mounted device, a pedestrian terminal (Pedestrian User Equipment, PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, televisions, washing machines or furniture, etc.), a game console, a personal computer (Personal Computer, PC), a teller machine or a self-service machine and other terminal side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be referred to as a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) access point (Access Point, AS) or a wireless fidelity (Wireless Fidelity, WiFi) node, etc.Among them, the base station can be called Node B (Node B, NB), Evolved Node B (Evolved Node B, eNB), the next generation Node B (the next generation Node B, gNB), New Radio Node B (New Radio Node B, NR Node B), access point, Relay Base Station (Relay Base Station, RBS), Serving Base Station (Serving Base Station, SBS), Base Transceiver Station (Base Transceiver Station, BTS), Radio Base Station, Radio Transceiver, Basic Service Set (Basic Service Set, BSS), Extended Service Set (Extended Service Set, ESS), Home Node B (home Node B, HNB), Home Evolved Node B (home evolved Node B), Transmission Reception Point (Transmission Reception Point, TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0048] To facilitate understanding of the embodiments of the present application, the Delay Doppler domain (Delay Dploerdomain) modulation technology related to the present application is described.

[0049] Delay Doppler domain modulation is to logically map the information in a data packet of size N×M, such as a Quadrature Amplitude Modulation (QAM) symbol, to an N×M grid point on a two-dimensional delay Doppler plane, that is, the pulse in each grid point modulates a QAM symbol in the data packet. Then, through a specific basis function transformation, the data set on the N×M delay Doppler domain plane is transformed into a time domain transmission data set.

[0050] The current mainstream delay Doppler domain modulation technology includes Orthogonal Time Frequency Space (OTFS) modulation technology. The OTFS system based on Orthogonal Frequency-Division Multiplexing (OFDM) is implemented by adding a precoder on the transmitting side of the OFDM system, in which the inverse symplectic Fourier transform (ISFFT) is used to convert the transmitted signal x[k,l] from the delay Doppler domain to the time-frequency domain. Then, the transceiver process of the OFDM system is used to obtain the received signal Y[m,n] in the time-frequency domain, which is input into the decoder added at the receiving end, in which the symplectic Fourier transform (SFFT) is used to calculate the received signal y[k,l] in the delay Doppler domain. After that, y[k,l] is subjected to channel estimation and equalization processing in the delay Doppler domain to obtain an estimate of the transmitted signal. The process is as follows Figure 2 shown.

[0051] pass Figure 2 The ISFFT and SFFT transformations in the OTFS data and the transformation relationship between the delay-Doppler domain and the time-frequency domain are as follows: Figure 3 As shown, OTFS data refers to data obtained based on OTFS modulation.

[0052] Based on the delay Doppler domain modulation technology, the time-varying time-frequency domain channel can be transformed into an approximately time-invariant delay Doppler domain channel, which can directly reflect the channel delay Doppler response characteristics caused by the geometric characteristics of the relative position of the reflector between the transceivers in the wireless link. Based on this, the delay Doppler domain modulation technology has the following advantages:

[0053] 1) Invariance of channel coupling state. Since the signal delay and Doppler response reflect the direct effect of reflectors in the physical channel and only depend on the relative speed and position of the reflectors, the signal delay and Doppler response can be regarded as invariant on the time scale of the wireless frame.

[0054] 2) Separability of channel coupling states. In the channel frequency response in the delay-Doppler domain, all diversity paths are reflected as a single impulse response and are completely separable. The QAM symbol traverses all these hierarchical paths.

[0055] 3) Orthogonality of channel coupling states: When the resolution of the waveform design is sufficient, the channel impulse response in the delay-Doppler domain can be considered to be limited to a delay-Doppler domain resource element (RE), thus theoretically eliminating interference between adjacent data on the delay-Doppler resource grid.

[0056] To facilitate understanding of the embodiments of the present application, the Integrated sensing and communication (ISAC) technology related to the present application is explained.

[0057] Future communication devices can integrate the dual functions of communication and perception through a protocol stack based on ISAC technology, realize hardware sharing, spectrum sharing, and protocol intercommunication between communication signals and perception signals, thereby realizing the integrated design of communication and perception functions. The core feature of future ISAC devices is the realization of waveform multiplexing between communication signals and perception signals. For example, through the waveform defined by the protocol, information transmission and target detection are carried out in the spectrum specified by the protocol. Furthermore, through a shared protocol stack, the channel information and spatial information obtained by the communication system and the perception system can be intercommunication, thereby realizing mutual assistance between communication and perception and further optimizing the overall performance.

[0058] The biggest challenge facing ISAC technology is the problem of coordinated work between communication and perception. The function of the communication system is to transmit information, so the optimization goal of the communication system is to approximate the Shannon channel capacity described in information theory; the function of the perception system is target detection, such as a typical radar system, whose optimization goal is the optimal lower bound of the estimated variance of the target parameters (range, speed, Doppler, etc.), that is, the Cramér-Rao bound of the fuzzy function. This difference in functional emphasis makes it difficult to optimize the performance of communication and perception at the same time in the design of the ISAC system, and it can only be compromised between the two according to the needs.

[0059] In the integrated design of radar-based communication and sensing, waveform design is the key. The key to integrated waveform design is to minimize the interference between communication signals and sensing signals, meet the requirements of communication and sensing functions, and improve spectrum efficiency under the premise of ensuring system performance. The integrated waveform can be reused, including but not limited to time division multiplexing, frequency division multiplexing, and space division multiplexing, or it can be shared, that is, designing a new fusion waveform. When designing, it is necessary to consider whether the integrated waveform should be based on communication function or radar detection function, and find a balance in performance. Common fusion waveforms include but are not limited to single-carrier waveforms and multi-carrier waveforms. Among them, single-carrier waveform design is usually combined with spread spectrum technology, such as direct-sequence spread spectrum (DSSS) and chirp spread spectrum (CSS); the multi-carrier integrated waveform is typically orthogonal frequency division multiplexing (OFDM) waveform, which has certain advantages over single-carrier spread spectrum integrated waveforms, such as higher spectrum efficiency, flexible bandwidth resource allocation, no range-Doppler coupling effect, etc., and is easier to integrate with 5G communication systems.

[0060] The traditional multi-carrier integrated waveform is mainly based on the OFDM waveform, and its advantages mainly lie in simple random signal generation, fully digital processing, and extremely high time-frequency processing gain. However, since the high accuracy of OFDM radar depends on the joint detection of multiple OFDM symbols, and the cyclic prefix (CP) of the OFDM symbol does not participate in the measurement, it will cause certain overhead; at the same time, the OFDM waveform has poor adaptability to high Doppler scenarios and can only detect Doppler frequency shifts of up to 10% of the subcarrier spacing, which has limitations in application scenarios.

[0061] Using the OTFS waveform as a sensing waveform can overcome the above two defects of the OFDM waveform. First, for a resource block of the same size P*Q, assume that P is the number of subcarriers and Q is the number of symbols. The OTFS signal only needs to add a CP in front of Q symbols to avoid interference between time slots; while the traditional OFDM signal needs to add a CP in front of each symbol to avoid interference between symbols, so a total of Q CPs are required. Therefore, the overhead of the OTFS waveform is significantly reduced, which means that it can use more energy to sense the signal itself, thereby improving the detection and tracking capabilities of the target. Secondly, due to the natural tolerance of the OTFS signal to high Doppler, the OTFS radar has good detection capabilities for larger Doppler frequency shifts in high-speed scenarios, which is much better than OFDM radar.

[0062] To facilitate understanding of the embodiments of the present application, the design of a demodulation reference signal (DMRS) in an OFDM system is described.

[0063] In the traditional OFDM system, DMRS is mapped in a comb structure within the data frame, and its resource mapping method can be flexibly configured. Taking NR PDSCH as an example, it is mainly controlled by the following parameters:

[0064] 1.pdsch.NumLayers, which indicates the number of PDSCH data ports, is usually also considered to be the number of DMRS ports corresponding to PDSCH data.

[0065] 2.pdsch.MappingType indicates the mapping mode of PDSCH, and the value can be Type A (Type-A) or Type B (Type-B). Type-A and Type-B differ in the starting OFDM symbol of PDSCH mapping and the length distribution of PDSCH. In addition, when the mapping mode of PDSCH is Type-A, DMRS can only be mapped from OFDM symbol 2 or 3. When the mapping mode of PDSCH is Type-B, DMRS can be mapped from the starting OFDM symbol of PDSCH.

[0066] 3.dmrs.DMRSLength indicates how many consecutive OFDM symbols DMRS will occupy.

[0067] 4.dmrs.DMRSConfigurationType defines the mapping rules between different subcarriers of DMRS on an OFDM symbol. For example, when the value is 1, it means that DMRS is mapped in a comb-like manner on the subcarrier (i.e., the mapping interval is 1). When the value is 2, it means that DMRS is continuously mapped in groups of two adjacent subcarriers, and between each subcarrier group. The above starting mapping positions all start from subcarrier 0.

[0068] 5.dmrs.DMRSTypeAPosition defines the OFDM symbol of the resource element (RE) containing PDSCH data on which the first column of DMRS is located, or in other words, the relative position of the first column of DMRS in the OFDM symbol set where the PDSCH data is located.

[0069] 6. The different values ​​of dmrs.DMRSAdditionalPosition define the relative positions of the DMRS columns other than the first column in the OFDM symbol set where the PDSCH data is located when there are more than one DMRS column.

[0070] 7.dmrs.NumCDMGroupsWithoutData indicates whether the subcarriers adjacent to the DMRS are left blank and the number of blanks. If left blank, the DMRS of other ports using adjacent subcarrier resources will not interfere with the PDSCH data of the current layer.

[0071] Tables 1 to 3 are examples of three DMRS configurations.

[0072] Table 1

[0073]

[0074] Table 2

[0075]

[0076] Table 3

[0077]

[0078] To facilitate understanding of the embodiments of the present application, the pilot design across transform domains related to the present application is described.

[0079] Without loss of generality, assume that a = [a1, a2, …, a Q ],b=[b1,b2,…,b P ] T are two known sequences with good autocorrelation characteristics, then the sequence C can be constructed as follows:

[0080]

[0081] As a two-dimensional pilot block with good autocorrelation and cross-correlation characteristics, C can be used for DD domain sensing pilot. Assume that the size of the two-dimensional pilot block is N P ×M P ,N P ≤N,M P ≤M, mapped separately in the delay-Doppler domain resource of size N×M, where N is the resource length of the delay domain, M is the resource length of the Doppler domain, and N P is the resource length occupied by the two-dimensional pilot block in the delay domain, M P is the resource length of the two-dimensional pilot block in the Doppler domain. The two-dimensional pilot block is superimposed and placed with the OFDM data after ISFFT transformation, such as Figure 4 As shown, OFDM data may refer to data modulated based on OFDM technology.

[0082] exist Figure 4In the OFDM communication system, the perceptual pilots are superimposed with the OFDM data in the time-frequency domain, and the perceptual pilots can be configured across data blocks (e.g., across OFDM subbands or time slots). For OFDM communication systems, a comb-mapped demodulation reference signal (DMRS) is usually used for channel estimation, and the receiving device uses the estimated channel for channel equalization. Since the channel acts on the signal as multiplication in the time-frequency domain, we can use a simple matrix dot division, that is, divide the sent DMRS by the received DMRS, and the quotient matrix is ​​the desired channel matrix.

[0083] Since the above scheme is based on the superposition of the perceptual pilot and the OFDM data, the equivalent pilot to be considered is the sum of the DMRS of the OFDM data and the perceptual pilot at the corresponding position, that is, Figure 4 The perceptual pilot in the upper part is Figure 4 The sum of the DMRS in the lower half.

[0084] After obtaining the equivalent pilot, the conventional OFDM channel estimation method can be used to obtain the estimated value of the channel matrix in the time-frequency domain. Then, the estimated channel matrix and the prior knowledge of the perceptual pilot are used to calculate the interference of the perceptual pilot on the OFDM data in the time-frequency domain, and this interference is removed before channel equalization.

[0085] However, the above solution has the following problems:

[0086] 1. In order to obtain equivalent pilots, the OFDM system needs to configure two sets of pilot information, namely, the OTFS sensing pilot and the DMRS information of the OFDM data, and the update cycles of these two pilot configurations are independent of each other, which may cause a large signaling reconfiguration overhead.

[0087] 2. Since the delayed Doppler domain sensing pilot is non-orthogonal to the data in the time-frequency domain, the receiving device of the communication system needs to perform additional interference elimination when demodulating the data, which increases the processing complexity of the receiving device.

[0088] 3. When the receiving device of the communication system performs interference elimination, it needs to understand the global information or partial information of the perception signal, such as the resource location, configuration period, and specific signal sample point value of the perception signal, resulting in a large signaling overhead.

[0089] In view of this, an embodiment of the present application provides a technical solution that can realize the two functions of perception and channel estimation through a set of Delay-Doppler Domain Pilot (DDDP). Among them, the DDDP can be used to realize the perception function, and the time-frequency domain transformation signal of the DDDP can be used to realize the channel estimation function.

[0090] The technical solution of the embodiment of the present application is designed based on the properties of Fourier transform, that is, the interpolation zero operation in one domain (such as time domain) is equivalent to the copy operation in another domain (such as frequency domain) after Fourier transform:

[0091]

[0092] Therefore, by replicating DDDP on the resource blocks in the DD domain as needed and performing Fourier transform on the replicated pilot blocks in a certain dimension (e.g., the horizontal dimension, or the Doppler dimension), an interpolation zero operation can be implemented on the corresponding dimension in the TF domain (e.g., the horizontal dimension, or the time domain dimension), that is, leaving the resource positions corresponding to the zero values ​​vacant.

[0093] Furthermore, when performing OFDM modulation symbol mapping in the TF domain, the resource position corresponding to the zero value can map the OFDM data, while the resource position corresponding to the non-zero value is the TFDP obtained by Fourier transforming the DDDP.

[0094] In some embodiments, the DDDP may be a pilot known to the transmitting end and the receiving end device, for example, the DDDP may be a pre-designed pilot. Then the TFDP at a non-zero value position may be used as a DMRS for OFDM data.

[0095] For example, Figure 5 The pilot block in (a) The corresponding two-dimensional Fourier transform result is Figure 5 (b) because It is copied 4 times in the horizontal direction and 2 times in the vertical direction, which is equivalent to obtaining a pilot block. Therefore, the result after copy extension (such as Figure 5 (a) After performing 8-point DFT / IDFT in the horizontal direction and 4-point DFT / IDFT in the vertical direction, the result is Interpolate 3 zeros in the horizontal direction and 1 zero in the vertical direction, and the final result is Figure 5 As shown in (b) in .

[0096] Fourier transform also has the duality of cyclic shift and phase change. If we need to change the cyclic shift of a sequence in one domain, we can use the phase change of each element in its Fourier transform dual sequence in another domain to achieve it. That is:

[0098] Therefore, the cyclic shift of TFDP in the time domain can be achieved by performing phase shift on DDDP.

[0099] For example, for OFDM signals, in order to ensure the flexibility of resource configuration, the starting position of the time-frequency domain of TFDP can be flexibly configured. Assuming that the position of p0 is the starting position and the coordinates of the upper left corner of the resource grid are (0,0), then Figure 5 The starting position of the pilot in (b) is (0,0). Figure 6 In (b), the starting position of the pilot is (2,1). Therefore, Figure 6 (b) can be regarded as Figure 5 (b) Circular displacement of 2 grids in the horizontal direction and 1 grid in the vertical direction. At this time, if we want to get Figure 6 The pilot mapping pattern in (b) needs to be Figure 5 The DDDP in (a) is phase-adjusted, where Represents the value of each element in the phase-adjusted DDDP.

[0100] Based on the above principle, multi-port mapping of pilot signals can be achieved through a code division structure in the delay Doppler domain.

[0101] by Figure 7 For example, Figure 7 (a) The period extension in the delay and Doppler dimensions is denoted by P dup . Figure 7 (b) After phase adjustment (denoted as ) is extended in the delay and Doppler dimensions, denoted by The sum of the two is then subjected to ISFFT and transformed into the time-frequency domain to obtain Figure 7 (c) shows the pilot mapping pattern.

[0102] in, Corresponding to P dup , correspond

[0103] Based on this, we can use and Different DMRS ports correspond to different layers of a physical channel, and the physical channel may be, for example, a physical downlink shared channel (PDSCH), a physical sidelink control channel (PSCCH), and the like.

[0104] Therefore, for the OFDM communication part in the ISAC system, multi-port DMRS mapping can be achieved through special design of the perception pilot, so as to achieve the reuse of DD domain perception pilot in the communication system without changing the multi-port design, channel estimation and symbol detection methods of the current OFDM system, thereby saving overhead and realizing the integrated design of the ISAC system on the pilot. In addition, another potential benefit based on the above scheme is that the power allocation change of the DD domain superimposed pilot can be used to flexibly achieve the power enhancement of pilots at different ports, so as to cope with different channel states.

[0105] A method for generating a pilot signal provided by the present application is described below.

[0106] In some embodiments, the transmitting end device may generate a target delayed Doppler domain pilot signal according to the pilot configuration. The transmitting end device here refers to a transmitting end device of the pilot signal. The pilot configuration is used to determine at least one of the resource, sequence, and power of the pilot signal. For example, the pilot configuration includes at least one of the resource configuration of the pilot signal in the time-frequency domain, the sequence configuration of the pilot signal, and the power configuration.

[0107] In some embodiments, resource configuration of the pilot signal in the time-frequency domain includes but is not limited to at least one of the following:

[0108] The starting position of the pilot signal in the time-frequency domain;

[0109] The time domain density K of the pilot signal, where K is a positive integer greater than 1;

[0110] The frequency domain density L of the pilot signal, where L is a positive integer greater than 1;

[0111] The size of resources occupied by a pilot signal in the time-frequency domain.

[0112] Optionally, the starting position of the pilot signal in the time-frequency domain may include the starting position of the pilot signal in the time domain and / or the starting position of the pilot signal in the frequency domain.

[0113] Optionally, the starting position of the pilot signal in the time-frequency domain can be represented by the position coordinates in the coordinate system established with the reference point as the origin, and the reference point can be any point in the time-frequency resource grid, or a specific point, such as a center point. Optionally, the size of the time-frequency resource grid can be agreed upon by the protocol, or it can be selected by the transmitting device. For example, the size of the time-frequency resource grid is X OFDM symbols * Y subcarriers, where X and Y are positive integers.

[0114] Optionally, the time domain density of the pilot signal can be used to indicate the sparsity of the TFDP in the time domain, or the mapping density. For example, the unit of the time domain density K is OFDM symbol, then when the time domain density of the pilot signal is K, it means that two adjacent non-zero TFDPs are separated by (K-1) OFDM symbols in the time domain.

[0115] Optionally, the time domain density K may be agreed upon by a protocol, or may be determined by a transmitting end device, for example, the transmitting end device may select one from a plurality of time domain densities. Optionally, the plurality of time domain densities may be agreed upon by a protocol, or may be determined by a transmitting end device.

[0116] Optionally, the frequency domain density of the pilot signal can be used for the sparsity of the TFDP in the frequency domain, or the mapping density. For example, the unit of the frequency domain density L can be a subcarrier, then when the frequency domain density of the pilot signal is L, it means that two adjacent non-zero TFDPs are separated by (L-1) subcarriers in the frequency domain.

[0117] Optionally, the frequency domain density L may be agreed upon by a protocol, or may be determined by a transmitting end device, for example, the transmitting end device may select one from a plurality of frequency domain densities. Optionally, the plurality of frequency domain densities may be agreed upon by a protocol, or may be determined by a transmitting end device.

[0118] Optionally, the time domain density K of the pilot signal in the pilot configuration may also be replaced by the time domain interval of the pilot signal (ie, the time domain interval between non-zero TFDPs), ie, K-1.

[0119] Optionally, the frequency domain density L of the pilot signal in the pilot configuration may also be replaced by the frequency domain interval of the pilot signal (ie, the frequency domain interval between non-zero TFDPs), ie, L-1.

[0120] That is, the resource configuration of the pilot signal in the time-frequency domain includes but is not limited to at least one of the following:

[0121] The starting position of the pilot signal in the time-frequency domain;

[0122] The time domain interval between the pilot signals is K-1, where K is a positive integer greater than 1;

[0123] The frequency domain interval between pilot signals is L-1, where L is a positive integer greater than 1.

[0124] In some embodiments, the resource size occupied by a pilot signal in the time-frequency domain may be represented by the number of OFDM symbols occupied by a pilot signal in the time domain and / or the number of subcarriers occupied by a pilot signal in the frequency domain.

[0125] For example, the number of OFDM symbols occupied by a pilot signal in the time domain may be M / K, and the number of subcarriers occupied by a pilot signal in the frequency domain may be N / L.

[0126] Optionally, the resource size occupied by a pilot signal in the time-frequency domain may also be defined as: the number of non-zero sample points of TFDP in the time dimension, ie, M / K, and the number of non-zero sample points in the frequency dimension, ie, N / L.

[0127] It should be understood that in an embodiment of the present application, the transmitting device can directly indicate to the receiving device the size of resources occupied by a pilot signal in the time-frequency domain, or it can also indicate parameters used to calculate the size of resources occupied by a pilot signal in the time-frequency domain, such as the above-mentioned M, N, K, and L parameters. The present application does not limit the specific indication method.

[0128] It should be noted that the above description in terms of the number of OFDM symbols in the time domain and subcarriers in the frequency domain is only an example. In actual applications, other time domain units may be used as units, such as time slots, subframes, radio channels, etc., or other frequency domain units may be used as units, such as physical resource blocks (PRBs), subchannels, subbands, bandwidth parts (Band Width Part, BWP), etc. The present application is not limited to this.

[0129] In some embodiments, the sequence configuration of the pilot signal includes but is not limited to at least one of the following:

[0130] The type of basic sequence used to generate the pilot signal, the generation formula of the basic sequence, and the generation parameters of the basic sequence.

[0131] In some embodiments, the generation parameters of the base sequence include: an initial value of the base sequence, or a DMRS scrambling identity (NID SSCID) and a DMRS scrambling initialization (NSCID) used to generate the initial value of the base sequence.

[0132] In some embodiments, the base sequence used to generate the pilot signal may include a first sequence and a second sequence, and the sequence configuration of the pilot signal may include a sequence configuration used to generate the first sequence and a sequence configuration used to generate the second sequence.

[0133] In some embodiments, the power configuration of the pilot signal is used to determine the transmit power used to transmit the pilot signal. For example, the power configuration may include a power scaling factor of the pilot signal, which is a power scaling factor of the transmit power of the pilot signal relative to the transmit power of the data signal. For example, the power scaling factor may indicate a power scaling factor of the transmit power of the DMRS relative to the transmit power of the physical channel. Therefore, the transmit power of the DMRS can be flexibly adjusted through this parameter.

[0134] In some embodiments, the transmitting end device generates a target delayed Doppler domain pilot signal according to the pilot configuration, including the following steps:

[0135] Step 1: Generate a first sequence with autocorrelation, where the length of the first sequence is related to the resource length M occupied by the pilot signal in the Doppler domain and the time domain density K of the pilot signal.

[0136] For example, to generate a length of The first sequence with good autocorrelation

[0137] Optionally, at least one cyclic prefix and / or at least one cyclic suffix may be added to the first sequence.

[0138] For example, add a length of L to the first sequence cp The cyclic prefix and / or length is L cs The cyclic suffix of in,

[0139] That is, the length of the first sequence is M / K, M / K+L cp 、M / K+L cs or M / K+L cp +L cs .

[0140] Step 2: Generate a second sequence with autocorrelation, where the length of the second sequence is related to the resource length N occupied by the pilot signal in the delay domain and the frequency domain density L of the pilot signal.

[0141] For example, to generate a length of The second sequence with good autocorrelation

[0142] Optionally, at least one cyclic prefix and / or at least one cyclic suffix may be added to the second sequence.

[0143] For example, add a length K to the second sequence cp The cyclic prefix and / or K cs The cyclic suffix of in,

[0144] That is, the length of the second sequence is N / L, N / L+K cp 、N / L+K cs or N / L+K cs +K cp .

[0145] Step 3: Calculate the Kronecker product of the first sequence and the second sequence to obtain a first delayed Doppler domain pilot signal, that is, a first DDDP.

[0146] For example, Or, S = vs, where represents the Kronecker Product.

[0147] Among them, S is the first DDDP.

[0148] Step 4: Copy (or extend) the first delayed Doppler domain pilot signal to obtain a second delayed Doppler domain pilot signal, i.e., a second DDDP, wherein, in the Doppler dimension, the second delayed Doppler domain pilot signal includes K first delayed Doppler domain pilot signals, and in the delay dimension, the second delayed Doppler domain pilot signal includes L first delayed Doppler domain pilot signals.

[0149] For example, Perform K extensions in the Doppler dimension and L extensions in the delay dimension to obtain the extended DD domain pilot S dup Among them, S dup This is the second DDDP.

[0150] Step 5: Generate a target delayed Doppler domain pilot signal, referred to as target DDDP, based on the second delayed Doppler domain pilot signal.

[0151] In some embodiments, the transmitting device may directly use the second delayed Doppler domain pilot signal as the target delayed Doppler domain pilot signal.

[0152] For example, if the starting position of the pilot signal in the time-frequency domain is the origin, the transmitting end device directly uses the second DDDP as the target DDDP.

[0153] In some embodiments, generating a target delayed Doppler domain pilot signal, referred to as a target DDDP, according to the second delayed Doppler domain pilot signal may include:

[0154] According to the starting position of the pilot signal in the time-frequency domain, the phase of the second delayed Doppler domain pilot signal is adjusted to generate a target delayed Doppler domain pilot signal.

[0155] For example, when the starting position of the pilot signal in the time-frequency domain is not the origin, the transmitting device may perform phase adjustment on the second DDDP according to the starting position of the pilot signal in the time-frequency domain to generate a target DDDP.

[0156] The following describes the specific implementation of adjusting the second DDDP to obtain the target DDDP in conjunction with a specific embodiment.

[0157] Method 1: Divide the second DDDP into multiple pilot signals, perform phase adjustment on the multiple pilot signals respectively, and use the multiple pilot signals after adjustment as the target DDDP.

[0158] For example, the second DDDP includes K*L pilot signals, wherein in the Doppler dimension, the second DDDP includes K pilot signals, and in the delay dimension, the second DDDP includes L pilot signals, and one pilot signal can be considered as a copy of S.

[0159] In some embodiments, the phase adjustment of the second delayed Doppler domain pilot signal according to the starting position of the pilot signal in the time-frequency domain to generate the target delayed Doppler domain pilot signal includes:

[0160] Phase adjustment is performed on each of the K*L pilot signals included in the second delayed Doppler domain pilot signal to obtain adjusted K*L pilot signals, and the target delayed Doppler domain pilot signal includes a set of the adjusted K*L pilot signals.

[0161] For example, according to the following formula, the pilot signal S among the K*L pilot signals is [k,l] Perform phase adjustment to obtain the adjusted pilot signal S′ [k,l] :

[0162]

[0163] That is,

[0164]

[0165]

[0166] …

[0167]

[0168] Where diag represents the focus matrix, a and b represent the starting positions of the pilot blocks in the time domain and frequency domain respectively, l = 0, 1, ..., L-1, k = 0, 1, ..., K-1, and the target DDDP includes S′ [k,l] A collection of .

[0169] Method 2: Group the second DDDP according to the Doppler dimension and the delay dimension respectively, wherein in the Doppler dimension, the second DDDP includes N groups of pilot signals, and in the delay dimension, the second DDDP includes M groups of pilot signals, and phase adjustment is performed according to the pilot signal groupings of the second DDDP in the Doppler dimension and the delay dimension to obtain the target DDDP.

[0170] In some embodiments, when the Doppler dimension is a horizontal dimension, the second DDDP can be divided into N rows along the horizontal dimension, and the N groups of pilot signals on the Doppler dimension can be considered as N rows of pilot signals, that is, a group of pilot signals on the Doppler dimension can be considered as one row of pilot signals; when the delay dimension is a vertical dimension, the second DDDP can be divided into M columns along the vertical dimension, and the M groups of pilot signals on the delay dimension can be considered as M columns of pilot signals, that is, a group of pilot signals on the delay dimension can be considered as one column of pilot signals.

[0171] The following describes the implementation method of obtaining the target DDDP according to the second DDDP in conjunction with a specific embodiment.

[0172] Method 2-1: The second DDDP is first phase-adjusted row by row and then column by column to obtain the target DDDP.

[0173] For example, the aforementioned step 5 may include:

[0174] Step 5-1: According to the starting position of the pilot signal in the time domain, perform phase adjustment on each row of the pilot signal of the second delayed Doppler domain pilot signal in the Doppler dimension to obtain a third delayed Doppler domain pilot signal.

[0175] For example, according to the following formula, the phase of each row of pilot signals of the second delayed Doppler domain pilot signal in the Doppler dimension is adjusted to obtain a third delayed Doppler domain pilot signal:

[0176]

[0177] Where i = 0, 1, ..., N-1, S dup (i,:) represents the i-th row of pilot signals in the second delayed Doppler domain pilot signal, a represents the starting position of the pilot signal in the time domain, S′ dup (i,:) represents the i-th row pilot signal in the third delayed Doppler domain pilot signal.

[0178] Step 5-2: According to the starting position of the pilot signal in the frequency domain, perform phase adjustment on each column of the pilot signal in the delay dimension of the third delayed Doppler domain pilot signal to obtain a fourth delayed Doppler domain pilot signal.

[0179] For example, according to the following formula, the phase of each column of pilot signals of the third delayed Doppler domain pilot signal in the delay dimension is adjusted to obtain a fourth delayed Doppler domain pilot signal:

[0180]

[0181] Where j = 0, 1, ..., M-1, S′ dup (:, j) represents the jth column pilot signal in the third delayed Doppler domain pilot signal, b represents the starting position of the pilot signal in the frequency domain, S″ dup (:,j) represents the j-th column pilot signal in the fourth delayed Doppler domain pilot signal.

[0182] Step 5-3: Use the fourth delayed Doppler domain pilot signal as the target delayed Doppler domain pilot signal.

[0183] Method 2-2: The second DDDP is first phase-adjusted column by column and then row by row to obtain the target DDDP.

[0184] For example, the aforementioned step 5 may include:

[0185] Step 5-1: According to the starting position of the pilot signal in the frequency domain, perform phase adjustment on each column of the pilot signal of the second delayed Doppler domain pilot signal in the delay dimension to obtain a fifth delayed Doppler domain pilot signal.

[0186] For example, according to the following formula, the phase of each column of pilot signals of the second delayed Doppler domain pilot signal in the delay dimension is adjusted to obtain a fifth delayed Doppler domain pilot signal:

[0187]

[0188] Where j = 0, 1, ..., M-1, S dup (:, j) represents the jth column pilot signal in the second delayed Doppler domain pilot signal, b represents the starting position of the pilot signal in the frequency domain, S′ dup (:, j) represents the j-th column pilot signal in the fifth delayed Doppler domain pilot signal.

[0189] Step 5-2: According to the starting position of the pilot signal in the time domain, perform phase adjustment on each row of the pilot signal of the fifth delayed Doppler domain pilot signal in the Doppler dimension to obtain a sixth delayed Doppler domain pilot signal.

[0190] For example, according to the following formula, the phase of each row of pilot signals of the fifth delayed Doppler domain pilot signal in the Doppler dimension is adjusted to obtain a sixth delayed Doppler domain pilot signal:

[0191]

[0192] Where j = 0, 1, ..., M-1, S′ dup (i,:) represents the i-th row of pilot signals in the fifth delayed Doppler domain pilot signal, a represents the starting position of the pilot signal in the time domain, S″ dup (i,:) represents the i-th row of pilot signals in the sixth delayed Doppler domain pilot signal.

[0193] Step 5-3: Use the sixth delayed Doppler domain pilot signal as the target delayed Doppler domain pilot signal.

[0194] In some embodiments, the transmitting device can also perform a time-frequency domain transform on the target delayed Doppler domain pilot signal to obtain a time-frequency domain pilot signal, i.e., TFDP; further, in the time-frequency domain, the TFDP and the modulation symbols of the data to be sent are mapped to OFDM symbols to obtain the target signal, wherein the modulation symbols of the data to be sent are mapped to the resource position corresponding to the zero-value TFDP, and the pilot signal at the resource position corresponding to the non-zero-value TFDP serves as the DMRS of the modulation symbols of the data to be sent; and then the target signal is sent to the receiving device.

[0195] In some embodiments, the target signal may be used as a sensing signal. For example, the sensing receiving device may transform the target signal into a delay Doppler domain to obtain a DDDP, and then perform sensing measurement based on the DDDP.

[0196] In some embodiments, for a communication receiving device, a non-zero value TFDP in a target signal can be used as a DMRS of OFDM data mapped on a zero value TFDP in a target signal, and channel estimation is performed based on the non-zero value TFDP. Therefore, in an embodiment of the present application, a communication system can also use an OFDM waveform, and a traditional time-frequency domain DMRS channel estimation method can still be used.

[0197] Therefore, in an embodiment of the present application, the perception signal and the communication signal can share time-frequency domain resources. The perception function can be implemented in the DD domain, and high-precision perception can be achieved through the periodically extended pilot signal in the DD domain. The communication function can be implemented through OFDM, and the time-frequency domain transformation signal of the DD domain pilot is used as DMRS for channel estimation. There is no need to configure the traditional OFDM DMRS, which reduces the signaling overhead and avoids the interference of the OTFS signal on the OFDM signal.

[0198] In some embodiments of the present application, the pilot parameters of the DD domain and the pilot parameters of the TF domain have the following association relationship:

[0199] 1. The period extension parameters of DDDP in the delay and Doppler dimensions are related to the sparsity of TF domain DMRS in the frequency and time dimensions (or mapping density, i.e., time domain density and frequency domain density). For example, the period extension parameters of DDDP in the delay dimension are related to the sparsity of TF domain in the frequency dimension, e.g., the two are equal, and the period extension parameters of DDDP in the Doppler dimension are related to the sparsity of TF domain in the time domain dimension, e.g., the two are equal.

[0200] 2. The phase adjustment factor of DDDP (i.e., the starting position of the pilot signal in the time-frequency domain) is related to the mapping position of the TF domain DMRS. In other words, the mapping position of the TF domain DMRS can be flexibly adjusted by the starting position parameter of the pilot signal in the time-frequency domain.

[0201] In some embodiments, the transmitting device can send multiple synaesthesia integrated signals according to multiple sets of pilot configurations, wherein each set of pilot configurations corresponds to a port, and pilot configurations of different ports correspond to different phase adjustment factors, thereby realizing mapping of multi-port pilots.

[0202] The above describes the specific implementation of the synaesthesia integrated signal transmission by the transmitting device. For the receiving device of the communication signal in the ISAC system (or, the communication receiving device, the communication receiving side device), the main concern is the position of the pilot signal that can be used as DMRS in the received target signal and the sequence form of the pilot signal. Therefore, the transmitting device only needs to indicate the pilot configuration that it is concerned about to the communication receiving device, which is conducive to reducing the pilot configuration overhead.

[0203] The following, combined Figure 8 , explaining the specific implementation of indicating the pilot configuration to the communication receiving end device.

[0204] Figure 8 is a schematic interactive diagram of a pilot configuration method 800 according to an embodiment of the present application, such as Figure 8 As shown, the method 800 includes at least part of the following:

[0205] S810. The first device receives at least one set of pilot configurations, where the pilot configurations include resource configurations of pilot signals in the time-frequency domain and / or sequence configurations of pilot signals.

[0206] In some embodiments, the at least one pilot configuration is used to send a pilot signal, and the first device is a receiving device of the pilot signal. The pilot signal can be used as a communication signal, for example, the pilot signal carries a physical channel and a corresponding DMRS. The first device is a receiving device of the communication signal.

[0207] In some embodiments, the at least one set of pilot configurations may be sent by the second device to the first device.

[0208] In some embodiments, the pilot signal may be sent by the second device, or may be sent by other devices. That is, the pilot configuration and the pilot signal sending device may be the same device, or may be different devices.

[0209] Optionally, the sending device of the pilot signal can send at least one set of pilot configurations to the first device, for example through signaling such as media access layer control element (Media Access Control Control Element, MAC CE), downlink control information (Downlink Control Information, DCI), and radio resource control (Radio Resource Control, RRC).

[0210] Optionally, the pilot signal transmitting end device may also forward the at least one set of pilot configurations to the first device through other devices in the communication system. For example, the other device may be a perception function network element in the system.

[0211] Optionally, the second device may be a network side device, and the first device may be a terminal device.

[0212] Optionally, the second device may be a terminal device, and the first device may be a network-side device or another terminal device.

[0213] Optionally, the pilot signal transmitting end device and receiving end device may be referred to as ISAC devices.

[0214] Optionally, the at least one set of pilot configurations may be determined by the second device itself. For example, the second device may determine the at least one set of pilot configurations based on business requirements of the synesthesia integration system (eg, performance requirements of perception pilots, data transmission requirements), etc.

[0215] Optionally, the at least one set of pilot configurations is determined by the second device according to a protocol agreement. For example, the protocol agrees on candidate pilot configurations, and the second device can select the at least one set of pilot configurations from the candidate pilot configurations.

[0216] Optionally, the at least one set of pilot configurations is determined by the second device according to a network side device configuration. For example, the network side device may indicate the at least one set of pilot configurations to the second device.

[0217] In some embodiments, the method 800 further includes:

[0218] S820: The first device receives a pilot signal according to the at least one set of pilot configurations.

[0219] For example, the first device receives at least one time-frequency domain pilot signal according to at least one set of pilot configurations, and the target pilot signal in the time-frequency domain pilot signal serves as the DMRS of the physical channel. The DMRS corresponding to the physical channel is transmitted through at least one DMRS port, and at least one set of pilot configurations corresponds one-to-one to the at least one DMRS port.

[0220] Furthermore, the first device can implement a sensing function in the DD domain, perform sensing detection using the DD domain transformation signal of the time-frequency domain pilot signal, and perform channel estimation using the time-frequency domain pilot signal to implement an OFDM communication function. The TF domain transformation signal of the DD domain pilot signal performs channel estimation to implement the OFDM communication function, so that the second device does not need to configure the DMRS configuration of the traditional OFDM system for the first device, which reduces signaling overhead and avoids interference of the OTFS signal with the OFDM signal.

[0221] Optionally, the physical channel may be a physical downlink channel, such as PDSCH, PDCCH, etc., or may be a physical sidelink channel, such as a physical sidelink shared channel (Physical Sidelink Shared Channel, PSSCH) or a physical sidelink control channel (Physical Sidelink Control Channel, PSCCH).

[0222] In some cases, the physical channel adopts single-stream transmission, or in other words, the layer number of the physical channel is 1, and the at least one set of pilot configurations includes a set of pilot configurations corresponding to one DMRS port.

[0223] In other cases, the physical channel adopts multi-stream transmission, or in other words, the number of layers of the physical channel is greater than 1, and the at least one set of pilot configurations includes multiple sets of pilot configurations corresponding to multiple DMRS ports, wherein each DMRS port corresponds to one layer of the physical channel.

[0224] In the following, the parameter design in the pilot configuration sent by the second device to the first device is described in conjunction with a specific embodiment.

[0225] In the embodiment of the present application, it is assumed that the communication receiving device does not need to perform signal analysis in the DD domain, and all communication-related operations are performed in the time-frequency domain. Based on this principle, the DMRS parameter configuration system of the traditional OFDM system can be used, but it needs to be adaptively adjusted according to the characteristics of TFDP itself (such as mapping density, location characteristics).

[0226] Since the ISAC system adopts a unified pilot sharing structure, the DMRS used for OFDM communication is directly obtained through TFDP. Therefore, when performing OFDM symbol mapping, pdsch.MappingType does not need to be considered. Therefore, pdsch.MappingType may not be included in the pilot configuration. That is to say, in the embodiment of the present application, the resource configuration of DMRS is decoupled from the configuration of the physical channel, and only the layer configuration is consistent with the physical channel. The main reasons are as follows:

[0227] 1. In the same time domain unit (e.g., subframe / time slot), whether the TFDP is inside or outside the PDSCH, it can be considered as the DMRS for PDSCH data;

[0228] 2. When the current subframe / time slot / BWP contains a control channel such as PDCCH, TFDP can also be used as DMRS for PDCCH;

[0229] 3. Since the perception pilot usually requires relatively large time-frequency resources to achieve high-precision measurement, accordingly, a TFDP usually spans multiple time domain units (such as subframes / time slots) and multiple frequency units (PRB / subchannel / BWP).

[0230] In summary, due to the above characteristics of TFDP, its mapping rules tend to be designed across time domain units and across frequency domain units.

[0231] In some embodiments, the resource configuration of the pilot signal in the time-frequency domain includes but is not limited to at least one of the following:

[0232] The time domain density K of the pilot signal, where K is a positive integer greater than 1;

[0233] The frequency domain density L of the pilot signal, where L is a positive integer greater than 1;

[0234] The starting position of the pilot signal in the time-frequency domain;

[0235] The size of resources occupied by a pilot signal in the time-frequency domain.

[0236] Based on the above parameters, it is possible to determine whether the resources of the TFDPs corresponding to different DMRS ports are continuous in the time-frequency domain and the interval between adjacent TFDPs. For the communication receiving device, when using TFDP as DMRS to demodulate the corresponding physical channel, the resource location mapped by DMRS can be determined based on the above key parameters.

[0237] In an embodiment of the present application, the mapping of TFDP is decoupled from the physical channel, and therefore, the relative relationship between the two may not be indicated. In this case, the method for determining the resource position of the DMRS corresponding to the physical channel is described in subsequent embodiments.

[0238] Optionally, the starting position of the pilot signal in the time-frequency domain may include the starting position of the pilot signal in the time domain and / or the starting position of the pilot signal in the frequency domain.

[0239] Optionally, the starting position of the pilot signal in the time-frequency domain can be represented by position coordinates in a coordinate system established with a reference point as the origin, and the reference point can be any point in the time-frequency resource grid, or a specific point, such as the upper left point or the lower left point. Optionally, the size of the time-frequency resource grid can be agreed upon by the protocol, or it can also be determined by the second device, or configured by the network side device.

[0240] In some embodiments, when the at least one set of pilot configurations includes multiple sets of pilot configurations, the starting positions of the pilot signals in the multiple sets of pilot configurations in the time-frequency domain are different from each other, so as to ensure that the DDDP generated according to the pilot configuration is mapped to different resource positions in the time-frequency domain. For example, the multiple sets of pilot configurations include a first pilot configuration and a second pilot configuration, the starting position of the pilot signal in the first pilot configuration in the time-frequency domain is a first starting position, the starting position of the pilot signal in the second pilot configuration in the time-frequency domain is a second starting position, and the first starting position and the second starting position are different.

[0241] In some embodiments, the size of the time-frequency resource grid can be determined according to the size of the data packet to be transmitted and related transmission parameters (such as modulation order, coding rate, system / BWP bandwidth), etc.

[0242] In other embodiments, the time-frequency resource grid size can be determined according to the performance requirements of the perceptual pilot. Assume that the bandwidth of a signal is B, the signal duration is T_slot, the subcarrier spacing is Δf, and the OFDM symbol length is T. When the signal occupies X*Y resource grids after sampling, B=YΔf, T_slot=XT. In perceptual signal processing, the signal bandwidth (equivalent to the frequency domain resource size Y) determines the delay resolution, i.e. 1 / YΔf, and the signal duration (equivalent to the time domain resource size X) determines the Doppler resolution, i.e. 1 / XT.

[0243] In the synaesthesia system, since 1) the system bandwidth of the communication system usually has only limited choices, denoted as Y_i; 2) there are known delay and Doppler resolution requirements for the perception scene, denoted as τ_min and ν_min. First, the selection of the system bandwidth Y_i needs to satisfy: 1 / Y_iΔf>=τ_min. Secondly, according to the Doppler resolution requirements, it can be determined that the OFDX symbol length X occupied by the signal needs to satisfy: 1 / XT>=ν_min. It can be further determined that the time-frequency resource grid size is X*Y_i, that is, the size of the time-frequency resource grid is X OFDX symbols*Y_i subcarriers.

[0244] In some embodiments, when determining the length of the OFDM symbol occupied by the signal, Q_i can be used as a unit, where Q_i represents the length of the minimum processing unit (subframe / time slot) for modulation and decoding of the data packet (the unit of length is OFDM symbol). For example, in order to reduce processing complexity, the frame boundaries of the pilot and data can be aligned. In this case, X needs to be taken as an integer multiple of Q_i, for example, X_i=ceil(X / Q_i)*Q_i, where ceil() means rounding up. At this time, the size of the time-frequency resource grid is X_i*Y_i, that is, the size of the time-frequency resource grid is X_i OFDM symbols*Y_i subcarriers.

[0245] Optionally, the time domain density of the pilot signal can be used to indicate the sparsity of the pilot signal in the time domain, or the mapping density. For example, the unit of the time domain density K is OFDM symbol, then when the time domain density of the pilot signal is K, it means that two adjacent non-zero value samples in the pilot signal are separated by (K-1) OFDM symbols in the time domain.

[0246] Optionally, the time domain density K may be agreed upon by the protocol, or may be determined by the second device, for example, the second device may select one of multiple time domain densities as the target time domain density, or may be configured by the network side device. Optionally, the multiple time domain densities may be agreed upon by the protocol, or may be determined by the second device, or may be configured by the network side device.

[0247] Optionally, the frequency domain density of the pilot signal can be used for the sparsity of the pilot signal in the frequency domain, or mapping density. For example, the unit of the frequency domain density L can be a subcarrier, then when the frequency domain density of the pilot signal is L, it means that two adjacent non-zero value samples (or non-zero value TFDP) in the pilot signal are separated by (L-1) subcarriers in the frequency domain.

[0248] Optionally, the frequency domain density L may be agreed upon by the protocol, or may be determined by the second device, for example, the second device may select one of multiple frequency domain densities as the target frequency domain density, or may be configured by the network side device. Optionally, the multiple frequency domain densities may be agreed upon by the protocol, or may be determined by the second device, or may be configured by the network side device.

[0249] Optionally, the time domain density K of the pilot signal in the pilot configuration may also be replaced by the time domain interval of the pilot signal (ie, the time domain interval between non-zero valued samples (or non-zero valued TFDP) in the pilot signal), ie, K-1.

[0250] Optionally, the frequency domain density L of the pilot signal in the pilot configuration may also be replaced by the frequency domain interval of the pilot signal (ie, the frequency domain interval between non-zero valued samples (or non-zero valued TFDP) in the pilot signal), ie, L-1.

[0251] That is, the resource configuration of the pilot signal in the time-frequency domain includes but is not limited to at least one of the following:

[0252] The starting position of the pilot signal in the time-frequency domain;

[0253] The time domain interval of the pilot signal is K-1, where K is a positive integer greater than 1;

[0254] The frequency domain interval of the pilot signal is L-1, where L is a positive integer greater than 1.

[0255] In some embodiments, the resource size occupied by a pilot signal in the time-frequency domain may be represented by the number of time-domain units occupied by a pilot signal in the time domain and / or the number of frequency-domain units occupied by a pilot signal in the frequency domain.

[0256] Optionally, the time domain unit may be an OFDM symbol, a time slot, a subframe, a radio frame, etc., and the frequency domain unit may be a subcarrier, a physical resource block (PRB), a subchannel, a subband, a bandwidth part (Band Width Part, BWP), etc., but the present application is not limited thereto.

[0257] Optionally, the number of time domain units occupied by a pilot signal in the time domain may be M / K, and the number of frequency domain units occupied by a pilot signal in the frequency domain may be N / L.

[0258] Optionally, the resource size occupied by a pilot signal in the time-frequency domain may also be defined as: the number of non-zero sample points of TFDP in the time dimension, ie, N / L, and the number of non-zero sample points in the frequency dimension, ie, M / K.

[0259] It should be understood that in an embodiment of the present application, the second device can directly indicate to the first device the size of resources occupied by a pilot signal in the time-frequency domain, or it can also indicate parameters used to calculate the size of resources occupied by a pilot signal in the time-frequency domain, such as the above-mentioned M, N, K, and L parameters. The present application does not limit the specific indication method.

[0260] In some embodiments, the sequence configuration of the pilot signal includes but is not limited to at least one of the following:

[0261] The type of basic sequence used to generate the pilot signal, the generation formula of the basic sequence, and the generation parameters of the basic sequence.

[0262] In some embodiments, the generation parameters of the base sequence include: an initial value of the base sequence, or a DMRS scrambling identity (NID SSCID) and a DMRS scrambling initialization (NSCID) used to generate the initial value of the base sequence.

[0263] In some embodiments, the base sequence used to generate the pilot signal may include a first sequence and a second sequence, and the sequence configuration of the pilot signal may include a sequence configuration used to generate the first sequence and a sequence configuration used to generate the second sequence.

[0264] In some embodiments, the sequence configuration of the pilot signal may include at least one of the parameters in Table 4.

[0265] Table 4

[0266]

[0267] Among them, dddp.type1 is used to indicate the type of the first sequence, dddp.cinit1 is used to indicate the initial value of the first sequence, dddp.polynomial1 is used to indicate the generator type of the first sequence, or to determine the generation formula of the first sequence, dddp.length1 is used to indicate the length of the first sequence, and dddp.phaseOff1 is used to indicate the phase adjustment parameter of the first sequence. dddp.type2 is used to indicate the type of the second sequence, dddp.cinit2 is used to indicate the initial value of the second sequence, dddp.polynomial2 is used to indicate the generator type of the second sequence, or to determine the generation formula of the second sequence, dddp.length2 is used to indicate the length of the second sequence, and dddp.phaseOff2 is used to indicate the phase adjustment parameter of the second sequence.

[0268] In some embodiments, the pilot configuration may also include a power configuration of the pilot signal, which is used to determine the transmit power used to send the pilot signal. For example, the power configuration may include a power scaling factor of the pilot signal, which is a power scaling factor of the transmit power of the pilot signal relative to the transmit power of the data signal. For example, the power scaling factor may indicate a power scaling factor of the transmit power of the DMRS relative to the transmit power of the physical channel. Therefore, the transmit power of the DMRS can be flexibly adjusted through this parameter.

[0269] In some embodiments of the present application, the pilot configuration further includes at least one of the following information:

[0270] The number P of DMRS ports corresponding to the physical channel;

[0271] The first indication information is used to indicate whether the first device uses the time domain transformation signal of the delayed Doppler domain pilot signal as the DMRS, or in other words, whether to use the traditional DMRS or the time domain transformation signal of the delayed Doppler domain pilot signal as the DMRS;

[0272] The second indication information is used to indicate whether the current layer data of the physical channel is mapped on the resources corresponding to other DMRS ports, and the current layer data of the physical channel corresponds to the DMRS port corresponding to the pilot configuration;

[0273] The third indication information is used to indicate the resource positions corresponding to other DMRS ports, for example, the starting positions corresponding to other DMRS ports, that is, the starting positions of the pilot signals on other DMRS ports;

[0274] Among them, the other DMRS ports are DMRS ports among the at least one DMRS port except the DMRS port corresponding to the pilot configuration. For example, the pilot configuration corresponds to the first DMRS port, and the other DMRS ports may refer to the other P-1 DMRS ports among the P DMRS ports except the first DMRS port.

[0275] In some embodiments, the number P of DMRS ports corresponding to the physical channel is less than or equal to the first port number threshold, and the first port number threshold may be the maximum number of ports supported by the communication system. For example, the first port number threshold may be 8 or 16, or may be flexibly set according to factors such as the large antenna scale of the communication system, the spatial separation between the ports, the processing complexity of the receiving device, the time-frequency domain pilot overhead, the time-frequency domain data detection performance, and the hardware cost.

[0276] In some embodiments, the second indication information may indicate P-1 DMRS positions, wherein the P-1 DMRS positions are used to indicate resource positions corresponding to other P-1 DMRS ports, wherein each DMRS position corresponds to a DMRS port.

[0277] In some embodiments, the third indication information may include P-1 indication bits, wherein the P-1 indication bits correspond one-to-one to other P-1 DMRS ports, and each indication bit is used to indicate whether the layer data of the physical channel corresponding to the first DMRS port is mapped on the corresponding DMRS port.

[0278] Table 5 is an example of a pilot configuration parameter provided in an embodiment of the present application.

[0279] Table 5

[0280]

[0281] Among them, pdsch.NumLayers represents the number of DMRS ports, or the number of layers of the physical channel, wherein each layer corresponds to a DMRS port.

[0282] dmrs.DMRSTime represents the time domain density of the pilot signal;

[0283] dmrs.DMRSFreq represents the frequency domain density of the pilot signal;

[0284] dmrs.DMRSPosition indicates the starting position of the pilot signal.

[0285] dmrs.DMRSSize indicates the resource size occupied by the pilot signal in the time and frequency domain.

[0286] Optionally, the dmrs.DMRSSize can also be replaced with dddp.DploerSize and dddp.DelaySize, where dddp.DploerSize represents the resource length M occupied by the pilot signal in the Doppler domain, dddp.DelaySize represents the resource length N occupied by the pilot signal in the delay domain, and the dddp.DploerSize and dddp.DelaySize can be used to calculate the resource size occupied by a pilot signal in the time-frequency domain.

[0287] dmrs.TypeOld (corresponding to the aforementioned first indication information) is used to indicate the type of DMRS used by the communication receiving device, that is, whether to use TFDP of DDDP as DMRS or traditional DMRS in the OFDM system. When traditional DMRS is used, it can be applicable to the scenario where the ISAC system does not perform the perception function and thus does not configure the perception pilot DDDP.

[0288] dmrs.otherDMRSPositions (corresponding to the aforementioned third indication information) is used to indicate the time-frequency resource positions of other DMRS ports in multi-stream transmission, such as the starting position.

[0289] dmrs.dataOnDMRSPositions (corresponding to the aforementioned second indication information) is used to indicate whether the current layer data of the physical channel is mapped to the time-frequency resource position of other DMRS ports in multi-stream transmission, and the current layer corresponds to the DMRS port corresponding to the current pilot configuration.

[0290] dmrs.NIDNSCID and dmrs.NSCID are the DMRS scrambling identifier and DMRS scrambling initial value used to generate the initial value of the basic sequence, respectively. Optionally, dmrs.NIDNSCID and dmrs.NSCID can also be replaced by the initial value c of the basic sequence. init .

[0291] The meaning of the sequence-related configuration refers to the relevant description of the aforementioned embodiment, and for the sake of brevity, it will not be repeated here.

[0292] The following describes the specific implementation of the communication receiving end device determining the resource location of the DMRS corresponding to the physical channel in conjunction with a specific embodiment.

[0293] In some embodiments of the present application, the method 800 further includes:

[0294] The first device determines a first time-frequency resource, where the first time-frequency resource is a time-frequency resource allocated to the physical channel;

[0295] Determine a second time-frequency resource according to the at least one set of pilot configurations, where the second time-frequency resource is a time-frequency resource allocated for the pilot signal;

[0296] The target pilot signal serving as the DMRS of the physical channel is determined according to the first time-frequency resources and the second time-frequency resources.

[0297] For example, the first device can determine the position and range of the time-frequency resources allocated to PDSCH based on the DCI in the PDCCH, that is, the position and range of the frequency domain resources (such as subcarriers, subbands, BWP, system bandwidth, etc.) occupied by the first time-frequency resources, and the position and range of the time domain resources (such as OFDM symbols, time slots, subframes, radio frames, etc.) occupied by the first time-frequency resources.

[0298] Furthermore, based on the pilot configuration, the position and range of the time-frequency resources allocated to the pilot signal can be determined, that is, the position and range of the frequency domain resources (such as subcarriers, subbands, BWP, system bandwidth, etc.) occupied by the second time-frequency resources, and the position and range of the time domain resources (such as OFDM symbols, time slots, subframes, radio frames, etc.) occupied by the second time-frequency resources.

[0299] Then, according to the position and range of the first time-frequency resource and the second time-frequency resource, a target pilot signal that can be used as a DMRS of the PDSCH in the pilot signal is determined. The target pilot signal can be considered as a part of the pilot signal associated with the PDSCH.

[0300] For example, a pilot signal located on the second time-frequency resource and within the time-frequency resource associated with the first time-frequency resource is used as a target pilot signal.

[0301] Optionally, the time-frequency resource associated with the first time-frequency resource may include at least one of the following:

[0302] First time-frequency resources;

[0303] A time-frequency resource of a first resource size adjacent to the first time-frequency resource.

[0304] For example, the pilot signal located on the second time-frequency resource and in the first time-frequency resource is used as the target time-frequency signal, that is, the pilot signal located in the time-frequency resource of PDSCH is used as the target pilot signal associated with PDSCH.

[0305] For another example, a pilot signal located on the second time-frequency resource and within a time-frequency resource of the first resource size adjacent to the first time-frequency resource is used as the target time-frequency signal. That is, a pilot signal within a specific range of time-frequency resources adjacent to the time-frequency resource of the PDSCH is used as the target pilot signal.

[0306] Optionally, the first resource size may be X REs, for example, a pilot signal within a time-frequency resource range that is not more than X REs away from the first time-frequency resource may be used as a target pilot signal. Optionally, the first resource size may be predefined, or indicated by the second device, or determined by the first device itself, or configured by a network-side device.

[0307] Therefore, in an embodiment of the present application, the perception signal and the communication signal can share time-frequency domain resources. The perception function can be implemented in the DD domain, and high-precision perception can be achieved through the periodically extended pilot signal in the DD domain. The communication function can be implemented through the OFDM waveform, and the time-frequency domain transformation signal of the DD domain pilot is used as DMRS for channel estimation. There is no need to configure the traditional OFDM DMRS, which reduces the signaling overhead and avoids the interference of the OTFS signal on the OFDM signal.

[0308] Furthermore, the mapping position of the TF domain DMRS is controlled by the phase adjustment parameter of the DDDP (the starting position of the pilot signal in the time-frequency domain), thereby realizing multi-port mapping of the DMRS.

[0309] For the receiving device of the perception signal in the ISAC system (or called the perception receiving device), the perception detection algorithm is mainly to process the pilot signal in the DD domain. Therefore, the perception receiving device is mainly concerned with the configuration of the pilot signal in the DD domain.

[0310] The following, combined Fig. 9 , which explains the specific implementation of the transmitting device indicating the pilot configuration to the sensing receiving end.

[0311] Fig. 9 is a schematic interactive diagram of a pilot configuration method 900 according to an embodiment of the present application, such as Fig. 9 As shown, the method 900 includes at least part of the following:

[0312] S910, the first device receives at least one set of pilot configurations, wherein the pilot configuration includes a configuration of a pilot signal in a delayed Doppler domain and / or a sequence configuration of a pilot signal, the pilot signal serves as a perception signal, the perception signal is transmitted through at least one port, and the at least one set of pilot configurations corresponds one-to-one to the at least one port.

[0313] In some embodiments, the at least one set of pilot configurations is used to send a pilot signal, the first device is a receiving device of the pilot signal, and the pilot signal is used as a perception signal. The first device is a receiving device of the perception signal.

[0314] In some embodiments, the at least one set of pilot configurations may be sent by the second device to the first device.

[0315] In some embodiments, the pilot signal may be sent by the second device, or may be sent by other devices. That is, the pilot configuration and the pilot signal sending device may be the same device, or may be different devices.

[0316] In some embodiments, the method 900 further includes:

[0317] S920: The first device receives a pilot signal according to the at least one set of pilot configurations.

[0318] Optionally, the pilot signal transmitting device may directly send at least one set of pilot configurations to the first device, for example, via signaling such as a media access layer control element (MAC CE), downlink control information (DCI), or radio resource control (RRC).

[0319] Optionally, the pilot signal transmitting end device may also forward the at least one set of pilot configurations to the first device through other devices in the communication system. For example, the other device may be a perception function network element in the system.

[0320] Optionally, the second device may be a network side device, and the first device may be a terminal device.

[0321] Optionally, the second device may be a terminal device, and the first device may be a network-side device or another terminal device.

[0322] Optionally, the pilot signal transmitting end device and receiving end device may be referred to as ISAC devices.

[0323] Optionally, the at least one set of pilot configurations may be determined by the second device itself. For example, the second device may determine the at least one set of pilot configurations based on business requirements of the synesthesia integration system (eg, performance requirements of perception pilots, data transmission requirements), etc.

[0324] Optionally, the at least one set of pilot configurations is determined by the second device according to a preset rule (eg, a protocol agreement). For example, the protocol agrees on candidate pilot configurations, and the second device may select the at least one set of pilot configurations from the candidate pilot configurations.

[0325] Optionally, the at least one set of pilot configurations is determined by the second device according to a network side device configuration. For example, the network side device may indicate the at least one set of pilot configurations to the second device.

[0326] Optionally, in some embodiments, the first device may also determine the at least one set of pilot configurations based on preset rules (such as protocol agreements). In this case, the second device may not need to send the at least one set of pilot configurations to the first device. Correspondingly, the pilot signal transmitting device may also determine the at least one set of pilot configurations in a similar manner, thereby ensuring that the pilot signal receiving device and the pilot signal transmitting device have a consistent understanding of the pilot configuration, thereby ensuring normal reception of the pilot signal.

[0327] In some embodiments, the configuration of the pilot signal in the delay Doppler domain includes at least one of the following:

[0328] The number of times the pilot signal is periodically extended (or replicated) in the delay domain;

[0329] The number of times the pilot signal is periodically extended (or replicated) in the Doppler domain;

[0330] The time position index occupied by the pilot signal;

[0331] a transmission period of the pilot signal;

[0332] Phase adjustment parameter of the pilot signal.

[0333] In some embodiments, the time position index occupied by the pilot signal includes a frame index, a subframe index or a time slot index occupied by the pilot signal.

[0334] In some embodiments, the pilot signal is sent periodically, and the time position index occupied by the pilot signal may include the starting time position index occupied by the pilot signal in one period, and optionally, may also include the number of time positions occupied by the pilot signal in one period. In this way, the pilot signal is sent continuously, or, it may also include a set of time position indexes occupied by the pilot signal in one period. In this way, the pilot signal may be sent continuously, or, it may also be sent discontinuously.

[0335] In some embodiments, the sequence configuration of the pilot signal includes at least one of the following:

[0336] The type of basic sequence used to generate the pilot signal, the generation formula of the basic sequence, and the generation parameters of the basic sequence.

[0337] In some embodiments, the generation parameters of the base sequence include at least one of the following:

[0338] The initial value of the basic sequence, or the DMRS scrambling identifier and the DMRS scrambling initial value used to generate the initial value of the basic sequence;

[0339] The length of the base sequence.

[0340] It should be understood that the specific implementation of the sequence configuration of the pilot signal refers to the relevant description in method 800, and for the sake of brevity, it will not be repeated here.

[0341] In some embodiments, when the number of ports is large, since one port corresponds to one TFDP, the number of perceptual pilots in the DD domain is also large accordingly, which is equivalent to having multiple layers of perceptual pilots superimposed on each other in the DD domain. At this time, when a single layer of perceptual pilot is used for perceptual detection, interference from perceptual pilots of other layers may be received, thereby affecting the perceptual detection performance. In order to solve this problem, in an embodiment of the present application, perceptual pilots of different layers are generated using basic sequences with low correlation. For example, at least one set of pilot configurations includes multiple sets of pilot configurations, and the basic sequences determined according to the multiple sets of pilot configurations satisfy low correlation.

[0342] Taking multiple sets of pilot configurations including a third pilot configuration and a fourth pilot configuration as an example, satisfying low correlation between basic trainings determined according to the multiple sets of pilot configurations may include: a basic sequence determined according to the third pilot configuration and a basic sequence determined according to the fourth pilot configuration satisfying low correlation.

[0343] For example, the basic sequence determined according to the third pilot configuration and the basic sequence determined according to the fourth pilot configuration satisfying low correlation may include but is not limited to at least one of the following:

[0344] The type of the basic sequence configured by the third pilot configuration is different from the type of the basic sequence configured by the third pilot configuration;

[0345] A generation formula of a basic sequence configured by the third pilot configuration is different from a generation formula of a basic sequence configured by the fourth pilot configuration;

[0346] Generation parameters of the basic sequence configured by the third pilot configuration are different from generation parameters of the basic sequence configured by the fourth pilot configuration.

[0347] In some embodiments, the pilot configuration further includes fourth indication information, used to indicate whether to send a pilot signal used as a perception signal.

[0348] Table 6 is an example of a pilot configuration parameter provided in an embodiment of the present application.

[0349] Table 6

[0350]

[0351] Among them, dddp.status corresponds to the aforementioned fourth indication information, indicating whether to send a pilot signal.

[0352] dddp.frameIndex represents the time domain position index occupied by the pilot signal, such as a frame index.

[0353] The meaning of the sequence-related configuration refers to the relevant description of the aforementioned embodiment, and for the sake of brevity, it will not be repeated here.

[0354] dddp.period indicates the transmission period of the pilot signal.

[0355] dmrs.NIDNSCID and dmrs.NSCID are the DMRS scrambling identifier and DMRS scrambling initial value used to generate the initial value of the basic sequence, respectively. Optionally, dmrs.NIDNSCID and dmrs.NSCID can also be replaced by the initial value c of the basic sequence. init .

[0356] In some embodiments, when the pilot configuration supports multiple ports and the perception receiving device supports near-line perception measurements based on multiple DDDPs, the transmitting device can send multiple sets of pilot configurations, so that the perception receiving device can integrate the measurement results of multi-port DDDP to improve perception performance.

[0357] Therefore, in the embodiment of the present application, the perception signal and the communication signal can share time-frequency domain resources. The perception function can be implemented in the DD domain, and high-precision perception can be achieved through the periodic extended pilot signal in the DD domain. Multi-port mapping of the perception signal is achieved through the phase adjustment parameters of the DDDP.

[0358] Combination of the above Figures 8 to 9 , describes in detail the method embodiment of the present application, and the following is combined with Figures 10 to 17 , the device embodiments of the present application are described in detail. It should be understood that the device embodiments and the method embodiments correspond to each other, and similar descriptions can refer to the method embodiments.

[0359] Fig.10 FIG. 1 shows a schematic block diagram of a pilot configuration device 1000 according to an embodiment of the present application. Fig.10 As shown, the pilot configuration device 1000 includes:

[0360] The communication unit 1010 is used to receive at least one set of pilot configurations, wherein the pilot configuration includes resource configuration of the pilot signal in the time-frequency domain and / or sequence configuration of the pilot signal, the target pilot signal in the pilot signal is used as the DMRS of the physical channel, the DMRS corresponding to the physical channel is transmitted through at least one DMRS port, and the at least one set of pilot configurations corresponds to the at least one DMRS port one-to-one.

[0361] In some embodiments, the resource configuration of the pilot signal in the time-frequency domain includes at least one of the following:

[0362] The time domain density K of the pilot signal, where K is a positive integer greater than 1;

[0363] The frequency domain density L of the pilot signal, where L is a positive integer greater than 1;

[0364] The starting position of the pilot signal in the time-frequency domain;

[0365] The size of resources occupied by a pilot signal in the time-frequency domain.

[0366] In some embodiments, the at least one set of pilot configurations includes multiple sets of pilot configurations, and the pilot signals in the multiple sets of pilot configurations have different starting positions in the time-frequency domain.

[0367] In some embodiments, the sequence configuration of the pilot signal includes at least one of the following:

[0368] The type of basic sequence used to generate the pilot signal, the generation formula of the basic sequence, and the generation parameters of the basic sequence.

[0369] In some embodiments, the generation parameters of the base sequence include at least one of the following:

[0370] The initial value of the base sequence;

[0371] A DMRS scrambling identifier and a DMRS scrambling initial value used to generate a basic sequence initial value;

[0372] The length of the base sequence.

[0373] In some embodiments, the pilot configuration further includes at least one of the following information:

[0374] The number of DMRS ports corresponding to the physical channel;

[0375] The first indication information is used to indicate whether the first device uses the time-frequency domain transformation signal of the delayed Doppler domain pilot channel as the DMRS;

[0376] The second indication information is used to indicate whether the current layer data of the physical channel is mapped on the resources corresponding to other DMRS ports, and the current layer data of the physical channel corresponds to the DMRS port corresponding to the pilot configuration;

[0377] The third indication information is used to indicate the resource locations corresponding to other DMRS ports;

[0378] The other DMRS ports are DMRS ports other than the DMRS port corresponding to the pilot configuration in the at least one DMRS port.

[0379] In some embodiments, the pilot configuration further includes a power configuration of the pilot signal.

[0380] In some embodiments, the pilot configuration apparatus 1000 further includes:

[0381] a processing unit, configured to determine a first time-frequency resource, where the first time-frequency resource is a time-frequency resource allocated for the physical channel;

[0382] Determine a second time-frequency resource according to the at least one set of pilot configurations, where the second time-frequency resource is a time-frequency resource allocated for the pilot signal;

[0383] The target pilot signal serving as the DMRS of the physical channel is determined according to the first time-frequency resources and the second time-frequency resources.

[0384] In some embodiments, the processing unit is further configured to:

[0385] A pilot signal located on the second time-frequency resource and on a time-frequency resource associated with the first time-frequency resource is used as the target pilot signal.

[0386] In some embodiments, the time-frequency resource associated with the first time-frequency resource includes at least one of the following: the first time-frequency resource;

[0387] A time-frequency resource of a first resource size adjacent to the first time-frequency resource.

[0388] It should be understood that the pilot configuration device 1000 according to the embodiment of the present application may correspond to the first device or the receiving end device in the method embodiment of the present application, and the above-mentioned and other operations and / or functions of each unit in the pilot configuration device 1000 are respectively for implementing the corresponding processes of the first device or the receiving end device in the aforementioned method embodiment. For the sake of brevity, they will not be repeated here.

[0389] Fig.11 FIG. 1 is a schematic block diagram of a pilot configuration device 1100 according to an embodiment of the present application. Fig.11 As shown, the pilot configuration device 1100 includes:

[0390] The communication unit 1110 is used to receive at least one set of pilot configurations, wherein the pilot configuration includes a configuration of a pilot signal in a delayed Doppler domain and / or a sequence configuration of a pilot signal, the pilot signal is used as a perception signal, and the perception signal is transmitted through at least one port, and the at least one set of pilot configurations corresponds to the at least one port one-to-one.

[0391] In some embodiments, the configuration of the pilot signal in the delay Doppler domain includes at least one of the following:

[0392] The number of times the pilot signal is replicated in the delay domain;

[0393] The number of times the pilot signal is replicated in the Doppler domain;

[0394] The time position index occupied by the pilot signal;

[0395] a transmission period of the pilot signal;

[0396] Phase adjustment parameter of the pilot signal.

[0397] In some embodiments, the time position index occupied by the pilot signal includes: a frame index, a subframe index or a time slot index occupied by the pilot signal.

[0398] In some embodiments, the sequence configuration of the pilot signal includes at least one of the following:

[0399] The type of basic sequence used to generate the pilot signal, the generation formula of the basic sequence, and the generation parameters of the basic sequence.

[0400] In some embodiments, the generation parameters of the base sequence include at least one of the following:

[0401] The initial value of the base sequence;

[0402] A DMRS scrambling identifier and a DMRS scrambling initial value used to generate a basic sequence initial value;

[0403] The length of the base sequence.

[0404] In some embodiments, the at least one set of pilot configurations includes multiple sets of pilot configurations, and basic sequences determined according to the multiple sets of pilot configurations satisfy low correlation.

[0405] In some embodiments, the pilot configuration further includes fourth indication information, used to indicate whether to send a pilot signal used as a perception signal.

[0406] It should be understood that the pilot configuration device 1100 according to the embodiment of the present application may correspond to the first device or the receiving end device in the method embodiment of the present application, and the above-mentioned and other operations and / or functions of each unit in the pilot configuration device 1100 are respectively for implementing the corresponding processes of the first device or the receiving end device in the aforementioned method embodiment. For the sake of brevity, they will not be repeated here.

[0407] Fig.12 FIG. 1 shows a schematic block diagram of a pilot configuration device 1200 according to an embodiment of the present application. Fig.12 As shown, the pilot configuration device 1200 includes:

[0408] The communication unit 1210 is used to send at least one set of pilot configurations, wherein the pilot configuration includes resource configuration of the pilot signal in the time-frequency domain and / or sequence configuration of the pilot signal, the target pilot signal in the pilot signal is used as the DMRS of the physical channel, and the DMRS corresponding to the physical channel is transmitted through at least one DMRS port, and the at least one set of pilot configurations corresponds to the at least one DMRS port one-to-one.

[0409] In some embodiments, the resource configuration of the pilot signal in the time-frequency domain includes at least one of the following:

[0410] The time domain density K of the pilot signal, where K is a positive integer greater than 1;

[0411] The frequency domain density L of the pilot signal, where L is a positive integer greater than 1;

[0412] The starting position of the pilot signal in the time-frequency domain;

[0413] The size of resources occupied by a pilot signal in the time-frequency domain.

[0414] In some embodiments, the at least one set of pilot configurations includes multiple sets of pilot configurations, and the pilot signals in the multiple sets of pilot configurations have different starting positions in the time-frequency domain.

[0415] In some embodiments, the sequence configuration of the pilot signal includes at least one of the following:

[0416] The type of basic sequence used to generate the pilot signal, the generation formula of the basic sequence, and the generation parameters of the basic sequence.

[0417] In some embodiments, the generation parameters of the base sequence include at least one of the following:

[0418] The initial value of the base sequence;

[0419] A DMRS scrambling identifier and a DMRS scrambling initial value used to generate a basic sequence initial value;

[0420] The length of the base sequence.

[0421] In some embodiments, the pilot configuration further includes at least one of the following information:

[0422] The number of DMRS ports corresponding to the physical channel;

[0423] The first indication information is used to indicate whether the first device uses the time-frequency domain transformation signal of the delayed Doppler domain pilot channel as the DMRS;

[0424] The second indication information is used to indicate whether the current layer data of the physical channel is mapped on the resources corresponding to other DMRS ports, and the current layer data of the physical channel corresponds to the DMRS port corresponding to the pilot configuration;

[0425] The third indication information is used to indicate the resource locations corresponding to other DMRS ports;

[0426] The other DMRS ports are DMRS ports other than the DMRS port corresponding to the pilot configuration in the at least one DMRS port.

[0427] In some embodiments, the pilot configuration further includes a power configuration of the pilot signal.

[0428] It should be understood that the pilot configuration device 1200 according to the embodiment of the present application may correspond to the second device or the transmitting end device in the method embodiment of the present application, and the above-mentioned and other operations and / or functions of each unit in the pilot configuration device 1200 are respectively for implementing the corresponding processes of the second device or the transmitting end device in the aforementioned method embodiment. For the sake of brevity, they will not be repeated here.

[0429] Fig.13 FIG. 1 is a schematic block diagram of a pilot configuration device 1300 according to an embodiment of the present application. Fig.13 As shown, the pilot configuration device 1300 includes:

[0430] The communication unit 1310 is used to send at least one set of pilot configurations, wherein the pilot configuration includes a configuration of a pilot signal in a delayed Doppler domain and / or a sequence configuration of a pilot signal, the pilot signal is used as a perception signal, and the perception signal is transmitted through at least one port, and the at least one set of pilot configurations corresponds to the at least one port one-to-one.

[0431] In some embodiments, the configuration of the pilot signal in the delay Doppler domain includes at least one of the following:

[0432] The number of times the pilot signal is replicated in the delay domain;

[0433] The number of times the pilot signal is replicated in the Doppler domain;

[0434] The time position index occupied by the pilot signal;

[0435] a transmission period of the pilot signal;

[0436] Phase adjustment parameter of the pilot signal.

[0437] In some embodiments, the time position index occupied by the pilot signal includes: a frame index, a subframe index or a time slot index occupied by the pilot signal.

[0438] In some embodiments, the sequence configuration of the pilot signal includes at least one of the following:

[0439] The type of basic sequence used to generate the pilot signal, the generation formula of the basic sequence, and the generation parameters of the basic sequence.

[0440] In some embodiments, the generation parameters of the base sequence include at least one of the following:

[0441] The initial value of the base sequence;

[0442] A DMRS scrambling identifier and a DMRS scrambling initial value used to generate a basic sequence initial value;

[0443] The length of the base sequence.

[0444] In some embodiments, the at least one set of pilot configurations includes multiple sets of pilot configurations, and basic sequences determined according to the multiple sets of pilot configurations satisfy low correlation.

[0445] In some embodiments, the pilot configuration further includes fourth indication information, used to indicate whether to send a pilot signal used as a perception signal.

[0446] It should be understood that the pilot configuration device 1300 according to the embodiment of the present application may correspond to the first device or the receiving end device in the method embodiment of the present application, and the above-mentioned and other operations and / or functions of each unit in the pilot configuration device 1300 are respectively for implementing the corresponding processes of the first device or the receiving end device in the aforementioned method embodiment. For the sake of brevity, they will not be repeated here.

[0447] The pilot configuration devices 1000, 1100, 1200, and 1300 in the above-mentioned application embodiments may be electronic devices, such as electronic devices with an operating system, or components in electronic devices, such as integrated circuits or chips. The electronic device may be a terminal, or may be other devices other than a terminal. Exemplarily, the terminal may include but is not limited to the types of the terminal 11 listed above, and other devices may be servers, network attached storage (NAS), etc., which are not specifically limited in the present application embodiments.

[0448] like Fig.14As shown, the embodiment of the present application further provides a communication device 1400, including a processor 1401 and a memory 1402, and the memory 1402 stores a program or instruction that can be run on the processor 1401. For example, when the communication device 1400 is a first device or a receiving end device, the program or instruction is executed by the processor 1401 to implement the steps performed by the first device or the receiving end device in the above-mentioned pilot configuration method, and can achieve the same technical effect. When the communication device 1400 is a second device or a transmitting end device, the program or instruction is executed by the processor 1401 to implement the steps performed by the second device or the transmitting end device in the above-mentioned pilot configuration method, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0449] Fig.15 It is a schematic structural diagram of the chip of an embodiment of the present application. Fig.15 The chip 1500 shown includes a processor 1510, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0450] In some embodiments, Fig.15 As shown, the chip 1500 may further include a memory 1520. The processor 1310 may call and run a computer program from the memory 1520 to implement the method in the embodiment of the present application.

[0451] The memory 1520 may be a separate device independent of the processor 1510 , or may be integrated into the processor 1510 .

[0452] In some embodiments, the chip 1500 may further include an input interface 1530. The processor 1510 may control the input interface 1530 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips. Optionally, the processor 1510 may be located inside or outside the chip.

[0453] In some embodiments, the chip 1500 may further include an output interface 1540. The processor 1510 may control the output interface 1540 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips. Optionally, the processor 1510 may be located inside or outside the chip.

[0454] In some embodiments, the chip can be applied to the second device or the transmitting device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the second device or the transmitting device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0455] In some embodiments, the chip can be applied to the first device or the receiving device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the first device or the receiving device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0456] In some embodiments, the chip mentioned in the embodiments of the present application may also be a chip, for example, a system-level chip, a system chip, a chip system, or a system-on-chip chip.

[0457] The embodiment of the present application also provides a terminal, including a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run a program or instruction to implement the steps in the pilot configuration method embodiment. The terminal embodiment corresponds to the first device or second device method embodiment, and each implementation process and implementation method of the method embodiment can be applied to the terminal embodiment and can achieve the same technical effect. Specifically, Fig.16 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0458] The terminal 1600 includes but is not limited to: a radio frequency unit 1601, a network module 1602, an audio output unit 1603, an input unit 1604, a sensor 1605, a display unit 1606, a user input unit 1607, an interface unit 1608, a memory 1609 and at least some of the components of the processor 1610.

[0459] Those skilled in the art will appreciate that the terminal 1600 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 1610 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.16 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0460] It should be understood that in the embodiment of the present application, the input unit 1604 may include a graphics processing unit (GPU) 16041 and a microphone 16042, and the graphics processor 16041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1606 may include a display panel 16061, and the display panel 16061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1607 includes a touch panel 16071 and at least one of other input devices 16072. The touch panel 16071 is also called a touch screen. The touch panel 16071 may include two parts: a touch detection device and a touch controller. Other input devices 16072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0461] In the embodiment of the present application, after receiving downlink data from the network side device, the RF unit 1601 can transmit the data to the processor 1610 for processing; in addition, the RF unit 1601 can send uplink data to the network side device. Generally, the RF unit 1601 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0462] The memory 1609 can be used to store software programs or instructions and various data. The memory 1609 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 1609 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 1609 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0463] The processor 1610 may include one or more processing units; optionally, the processor 1610 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 1610.

[0464] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiment and achieve the same or corresponding technical effect. To avoid repetition, it will not be repeated here.

[0465] The embodiment of the present application also provides a network side device, including a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps of the pilot configuration method embodiment. The network side device embodiment corresponds to the first device or second device method embodiment, and each implementation process and implementation method of the method embodiment can be applied to the network side device embodiment, and can achieve the same technical effect.

[0466] Specifically, the embodiment of the present application also provides a network side device. Fig.17 As shown, the network side device 1700 includes: an antenna 1701, a radio frequency device 1702, a baseband device 1703, a processor 1704 and a memory 1705. The antenna 1701 is connected to the radio frequency device 1702. In the uplink direction, the radio frequency device 1702 receives information through the antenna 1701 and sends the received information to the baseband device 1703 for processing. In the downlink direction, the baseband device 1703 processes the information to be sent and sends it to the radio frequency device 1702. The radio frequency device 1702 processes the received information and sends it out through the antenna 1701.

[0467] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 1703, which includes a baseband processor.

[0468] The baseband device 1703 may include, for example, at least one baseband board on which a plurality of chips are arranged. Fig.17 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 1705 through a bus interface to call the program in the memory 1705 to execute the network side device operations shown in the above method embodiment.

[0469] The network side device may further include a network interface 1706, which is, for example, a Common Public Radio Interface (CPRI).

[0470] Specifically, the network side device 1700 of the embodiment of the present application further includes: instructions or programs stored in the memory 1705 and executable on the processor 1704, and the processor 1704 calls the instructions or programs in the memory 1705 to execute Figures 10 to 13 The methods executed by the modules shown achieve the same technical effects, and therefore will not be described here in detail to avoid repetition.

[0471] The embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by the processor, each process of the pilot configuration method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here. Among them, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0472] An embodiment of the present application also provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the above-mentioned pilot configuration method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0473] The embodiment of the present application also provides a communication system. The communication system includes a first device and a second device. The first device can be used to implement the corresponding function implemented by the first device or the receiving end device in the above method, and the second device can be used to implement the corresponding function implemented by the second device or the sending end device in the above method, which will not be described in detail for the sake of brevity.

[0474] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0475] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, by hardware. , but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM, / RAM, disk, CD, etc.), including a number of instructions to enable a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) or a network-side device to execute the methods described in each embodiment of the present application.

[0476] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of the present application and the scope of protection of the claims, and these implementation methods are all within the protection of the present application.

Claims

1. A pilot configuration method, characterized in that: include: The first device receives at least one set of pilot configurations, wherein the pilot configuration includes resource configuration of the pilot signal in the time-frequency domain and / or sequence configuration of the pilot signal, the target pilot signal in the pilot signal serves as the DMRS of the physical channel, the DMRS corresponding to the physical channel is transmitted through at least one DMRS port, and the at least one set of pilot configurations corresponds one-to-one to the at least one DMRS port.

2. The method according to claim 1, characterized in that: The resource configuration of the pilot signal in the time-frequency domain includes at least one of the following: The time domain density K of the pilot signal, where K is a positive integer greater than 1; The frequency domain density L of the pilot signal, where L is a positive integer greater than 1; The starting position of the pilot signal in the time-frequency domain; The size of resources occupied by a pilot signal in the time-frequency domain.

3. The method according to claim 2, characterized in that The at least one set of pilot configurations includes multiple sets of pilot configurations, and the starting positions of pilot signals in the multiple sets of pilot configurations are different in the time-frequency domain.

4. The method according to any one of claims 1 to 3, characterized in that The sequence configuration of the pilot signal includes at least one of the following: The type of basic sequence used to generate the pilot signal, the generation formula of the basic sequence, and the generation parameters of the basic sequence.

5. The method according to claim 4, characterized in that The generation parameters of the basic sequence include at least one of the following: The initial value of the base sequence; A DMRS scrambling identifier and a DMRS scrambling initial value used to generate a basic sequence initial value; The length of the base sequence.

6. The method according to any one of claims 1 to 5, characterized in that The pilot configuration also includes at least one of the following information: The number of DMRS ports corresponding to the physical channel; The first indication information is used to indicate whether the first device uses the time-frequency domain transformation signal of the delayed Doppler domain pilot channel as the DMRS; The second indication information is used to indicate whether the current layer data of the physical channel is mapped on the resources corresponding to other DMRS ports, and the current layer data of the physical channel corresponds to the DMRS port corresponding to the pilot configuration; The third indication information is used to indicate the resource locations corresponding to other DMRS ports; The other DMRS ports are DMRS ports other than the DMRS port corresponding to the pilot configuration in the at least one DMRS port.

7. The method according to any one of claims 1 to 6, characterized in that The pilot configuration also includes a power configuration of the pilot signal.

8. The method according to any one of claims 1 to 7, characterized in that The method further comprises: Determining a first time-frequency resource, where the first time-frequency resource is a time-frequency resource allocated to the physical channel; Determine a second time-frequency resource according to the at least one set of pilot configurations, where the second time-frequency resource is a time-frequency resource allocated for the pilot signal; The target pilot signal serving as the DMRS of the physical channel is determined according to the first time-frequency resources and the second time-frequency resources.

9. The method according to claim 8, characterized in that The determining, according to the first time-frequency resource and the second time-frequency resource, the target pilot signal as the DMRS of the physical channel includes: A pilot signal located on the second time-frequency resource and on a time-frequency resource associated with the first time-frequency resource is used as the target pilot signal.

10. The method according to claim 9, characterized in that The time-frequency resource associated with the first time-frequency resource includes at least one of the following: the first time-frequency resource; A time-frequency resource of a first resource size adjacent to the first time-frequency resource.

11. A pilot configuration method, characterized in that: include: The first device receives at least one set of pilot configurations, wherein the pilot configuration includes a configuration of a pilot signal in a delayed Doppler domain and / or a sequence configuration of a pilot signal, the pilot signal serves as a perception signal, the perception signal is transmitted through at least one port, and the at least one set of pilot configurations corresponds to the at least one port in a one-to-one manner.

12. The method according to claim 11, characterized in that The configuration of the pilot signal in the delay Doppler domain includes at least one of the following: The number of times the pilot signal is replicated in the delay domain; The number of times the pilot signal is replicated in the Doppler domain; The time position index occupied by the pilot signal; a transmission period of the pilot signal; Phase adjustment parameter of the pilot signal.

13. The method according to claim 12, characterized in that The time position index occupied by the pilot signal includes: a frame index, a subframe index or a time slot index occupied by the pilot signal.

14. The method according to any one of claims 11 to 13, characterized in that The sequence configuration of the pilot signal includes at least one of the following: The type of basic sequence used to generate the pilot signal, the generation formula of the basic sequence, and the generation parameters of the basic sequence.

15. The method according to claim 14, characterized in that The generation parameters of the basic sequence include at least one of the following: The initial value of the base sequence; A DMRS scrambling identifier and a DMRS scrambling initial value used to generate a basic sequence initial value; The length of the base sequence.

16. The method according to any one of claims 11 to 15, characterized in that The at least one set of pilot configurations includes multiple sets of pilot configurations, and basic sequences determined according to the multiple sets of pilot configurations satisfy low correlation.

17. The method according to any one of claims 11 to 16, characterized in that The pilot configuration also includes fourth indication information, which is used to indicate whether to send a pilot signal used as a perception signal.

18. A pilot configuration method, characterized in that: include: The second device sends at least one set of pilot configurations, wherein the pilot configuration includes resource configuration of the pilot signal in the time-frequency domain and / or sequence configuration of the pilot signal, the target pilot signal in the pilot signal serves as the DMRS of the physical channel, the DMRS corresponding to the physical channel is transmitted through at least one DMRS port, and the at least one set of pilot configurations corresponds one-to-one to the at least one DMRS port.

19. A pilot configuration method, characterized in that: include: The second device sends at least one set of pilot configurations, wherein the pilot configuration includes a configuration of a pilot signal in a delayed Doppler domain and / or a sequence configuration of a pilot signal, the pilot signal serves as a perception signal, the perception signal is transmitted through at least one port, and the at least one set of pilot configurations corresponds one-to-one to the at least one port.

20. A pilot configuration device, characterized in that: include: A communication unit, used to receive at least one set of pilot configurations, wherein the pilot configuration includes resource configuration of the pilot signal in the time-frequency domain and / or sequence configuration of the pilot signal, a target pilot signal in the pilot signal is used as a DMRS of a physical channel, the DMRS corresponding to the physical channel is transmitted through at least one DMRS port, and the at least one set of pilot configurations corresponds to the at least one DMRS port one-to-one.

21. A pilot configuration device, characterized in that: include: A communication unit is used to receive at least one set of pilot configurations, wherein the pilot configuration includes a configuration of a pilot signal in a delayed Doppler domain and / or a sequence configuration of a pilot signal, the pilot signal is used as a perception signal, the perception signal is transmitted through at least one port, and the at least one set of pilot configurations corresponds to the at least one port one-to-one.

22. A pilot configuration device, characterized in that: include: A communication unit, used to send at least one set of pilot configurations, wherein the pilot configuration includes resource configuration of the pilot signal in the time-frequency domain and / or sequence configuration of the pilot signal, a target pilot signal in the pilot signal is used as a DMRS of a physical channel, the DMRS corresponding to the physical channel is transmitted through at least one DMRS port, and the at least one set of pilot configurations corresponds to the at least one DMRS port one-to-one.

23. A pilot configuration device, characterized in that: include: A communication unit, used to send at least one set of pilot configurations, wherein the pilot configuration includes a configuration of a pilot signal in a delayed Doppler domain and / or a sequence configuration of a pilot signal, the pilot signal is used as a perception signal, the perception signal is transmitted through at least one port, and the at least one set of pilot configurations corresponds to the at least one port one-to-one.

24. A communication device, characterized in that: It comprises a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute the method as claimed in any one of claims 1 to 10, or the method as claimed in any one of claims 11 to 17, or the method as claimed in claim 18, or the method as claimed in claim 19.

25. A computer-readable storage medium, characterized in that: Used to store a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 10, or the method according to any one of claims 11 to 17, or the method according to claim 18, or the method according to claim 19.

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