Reference signal transmission method, apparatus, and network device

Abstract

The application relates to a reference signal sending method, device and network equipment. The method comprises the following steps: in response to a reference signal sending request of a terminal device, a macro time variable, a micro time variable and a time slot parameter of a base station are acquired; wherein the macro time variable comprises a system frame number SFN of a current wireless frame, and the micro time variable represents an instantaneous time position of the current wireless frame; a first parameter is determined according to the macro time variable, the micro time variable and the time slot parameter; a reference signal sequence is generated according to the first parameter and a sequence type of the reference signal sequence to be generated; and the reference signal sequence is sent to the terminal device; wherein the reference signal sequence is used for wireless sensing measurement and interference detection of the terminal device. The method can improve the measurement accuracy, interference identification capability and system stability of a sensing-integrated system.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and in particular to a reference signal transmission method, apparatus, and network device. Background Technology

[0002] In an integrated sensing and communication (ISAC) system, network devices or terminals need to send dedicated sensing reference signals (SRS) to achieve ranging, velocity measurement, or imaging of targets (such as drones, vehicles, micro-moving targets, etc.).

[0003] In existing 3GPP 5G NR protocols (such as TS 38.211), the physical layer reference signal sequence is typically generated based on a pseudo-random sequence or a constant envelope sequence. The pseudo-random initial seed (first parameter) or frequency hopping parameter that controls the generation of these sequences usually strongly depends on the intra-frame slot number or symbol sequence number. Since the length of a radio frame (RF) is fixed at 10ms, and the intra-frame slot number is reset to zero at each radio frame boundary, this results in a strict 10ms periodicity in the pseudo-random hopping pattern on a macroscopic time scale.

[0004] However, radar sensing typically requires long coherent processing intervals (CPI) on the order of hundreds of milliseconds to extract high-precision Doppler velocity or micro-motion features. Directly using existing communication reference signals with a periodicity of 10 ms for long CPI sensing will severely reduce the signal-to-interference-plus-noise ratio and will also form grating lobes in the Doppler domain, appearing as false targets and masking the echoes of real, weak targets. Summary of the Invention

[0005] Therefore, it is necessary to provide a reference signal transmission method, apparatus, and network device to address the aforementioned technical problems.

[0006] In a first aspect, this application provides a reference signal transmission method applied to a base station, comprising:

[0007] In response to a reference signal transmission request from a terminal device, macroscopic time variables, microscopic time variables, and time slot parameters of the base station are obtained; wherein, the macroscopic time variables include the system frame number (SFN) of the current radio frame, and the microscopic time variables represent the instantaneous time position of the current radio frame;

[0008] The first parameter is determined based on the macroscopic time variable, the microscopic time variable, and the time slot parameter;

[0009] The reference signal sequence is generated based on the first parameter and the sequence type of the reference signal sequence to be generated;

[0010] The reference signal sequence is sent to the terminal device; wherein the reference signal sequence is used by the terminal device to perform wireless sensing measurement and interference detection.

[0011] In one embodiment, the micro-time variables include the current time slot number within the frame and the current symbol number within the time slot, and the time slot parameters include the number of time slots per frame, the number of symbols per time slot, and the scrambling code identifier;

[0012] The step of determining the first parameter based on the macroscopic time variable, the microscopic time variable, and the time slot parameter includes:

[0013] The global absolute time slot number is determined based on the SFN, the number of time slots in a single frame, and the current time slot number within the frame;

[0014] The first parameter is determined based on the current symbol number within the time slot, the global absolute time slot number, the number of symbols in a single time slot, and the scrambling code identifier.

[0015] In one embodiment, determining the global absolute time slot number based on the SFN, the number of time slots in a single frame, and the current time slot number within the frame includes:

[0016] The cumulative number of time slots across frames is determined by multiplying the SFN and the number of time slots in a single frame.

[0017] The global absolute time slot number is determined based on the sum of the cumulative time slot number across frames and the current time slot number within the frame.

[0018] In one embodiment, determining the first parameter based on the current symbol sequence number within the time slot, the global absolute time slot sequence number, the number of symbols per time slot, and the scrambling code identifier includes:

[0019] The global absolute symbol number is determined by summing the product of the single-slot symbol number and the global absolute slot number with the current symbol number within the slot.

[0020] The first parameter is determined based on the global absolute symbol number and the scrambling code identifier.

[0021] In one embodiment, the micro-temporal variables include the current time slot number within the frame and the current symbol number within the time slot, and the time slot parameters include the number of symbols per time slot and the scrambling code identifier;

[0022] The step of determining the first parameter based on the macroscopic time variable, the microscopic time variable, and the time slot parameter includes:

[0023] The absolute symbol number within the frame is determined by summing the product of the single time slot symbol number and the current time slot number within the frame with the current symbol number within the time slot.

[0024] The first parameter is determined based on the intra-frame absolute symbol number, SFN, and scrambling code identifier.

[0025] In one embodiment, generating the reference signal sequence based on the first parameter and the sequence type of the reference signal sequence to be generated includes:

[0026] When the sequence type of the reference signal sequence to be generated is a pseudo-random sequence, the first parameter is used as the initial seed of the pseudo-random sequence generator to obtain the pseudo-random bit stream output by the pseudo-random sequence generator.

[0027] The pseudo-random bitstream is digitally modulated to obtain a reference signal sequence.

[0028] In one embodiment, generating the reference signal sequence based on the first parameter and the sequence type of the reference signal sequence to be generated includes:

[0029] When the sequence type of the reference signal sequence to be generated is a constant envelope sequence, pseudo-random control bits are generated according to the first parameter;

[0030] The jump parameters are extracted from the pseudo-random control bits, and the root index of the constant envelope sequence is updated according to the extracted jump parameters;

[0031] Substitute the updated root index into the preset sequence analysis formula to obtain the reference signal sequence.

[0032] In one embodiment, the method further includes:

[0033] If the measurement requirement of the terminal is determined to be coherent cumulative measurement based on the reference signal transmission request, a preset number of consecutive symbols are taken as a sensing coherent block;

[0034] Within the same sensing coherent block, the first parameter of the reference signal sequence carried by different symbols is the same.

[0035] Secondly, this application also provides a reference signal transmitting device, configured in a base station, comprising:

[0036] The parameter acquisition module is used to acquire macroscopic time variables, microscopic time variables, and time slot parameters of the base station in response to the reference signal transmission request of the terminal device; wherein, the macroscopic time variables include the system frame number (SFN) of the current radio frame, and the microscopic time variables represent the instantaneous time position of the current radio frame;

[0037] The parameter determination module is used to determine the first parameter based on the macroscopic time variable, the microscopic time variable, and the time slot parameter;

[0038] A sequence generation module is used to generate the reference signal sequence according to the first parameter and the sequence type of the reference signal sequence to be generated;

[0039] A sequence transmission module is used to transmit the reference signal sequence to the terminal device; wherein the reference signal sequence is used by the terminal device to perform wireless sensing measurement and interference detection.

[0040] Thirdly, this application also provides a network device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0041] In response to a reference signal transmission request from a terminal device, macroscopic time variables, microscopic time variables, and time slot parameters of the base station are obtained; wherein, the macroscopic time variables include the system frame number (SFN) of the current radio frame, and the microscopic time variables represent the instantaneous time position of the current radio frame;

[0042] The first parameter is determined based on the macroscopic time variable, the microscopic time variable, and the time slot parameter;

[0043] The reference signal sequence is generated based on the first parameter and the sequence type of the reference signal sequence to be generated;

[0044] The reference signal sequence is sent to the terminal device; wherein the reference signal sequence is used by the terminal device to perform wireless sensing measurement and interference detection.

[0045] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the following steps:

[0046] In response to a reference signal transmission request from a terminal device, macroscopic time variables, microscopic time variables, and time slot parameters of the base station are obtained; wherein, the macroscopic time variables include the system frame number (SFN) of the current radio frame, and the microscopic time variables represent the instantaneous time position of the current radio frame;

[0047] The first parameter is determined based on the macroscopic time variable, the microscopic time variable, and the time slot parameter;

[0048] The reference signal sequence is generated based on the first parameter and the sequence type of the reference signal sequence to be generated;

[0049] The reference signal sequence is sent to the terminal device; wherein the reference signal sequence is used by the terminal device to perform wireless sensing measurement and interference detection.

[0050] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, performs the following steps:

[0051] In response to a reference signal transmission request from a terminal device, macroscopic time variables, microscopic time variables, and time slot parameters of the base station are obtained; wherein, the macroscopic time variables include the system frame number (SFN) of the current radio frame, and the microscopic time variables represent the instantaneous time position of the current radio frame;

[0052] The first parameter is determined based on the macroscopic time variable, the microscopic time variable, and the time slot parameter;

[0053] The reference signal sequence is generated based on the first parameter and the sequence type of the reference signal sequence to be generated;

[0054] The reference signal sequence is sent to the terminal device; wherein the reference signal sequence is used by the terminal device to perform wireless sensing measurement and interference detection.

[0055] The aforementioned reference signal transmission method, apparatus, and network equipment, by introducing a high-level macroscopic time variable SFN combined with physical layer microscopic time variables and coordinating with base station time slot configuration parameters to jointly generate the initial seed of the reference signal, completely overcome the inherent defects of traditional reference signals, such as forced reset every 10ms wireless frame and periodic repetition of the sequence. It retains the signal timing accuracy brought by intra-frame microscopic timing variables while achieving ultra-long-period random iterative updates of the reference signal sequence through cross-frame macroscopic variables, effectively improving the randomness, uniqueness, and anti-interference performance of the reference signal. Simultaneously, by adapting to different sequence types, it can accommodate diverse service needs, significantly improving the measurement accuracy, interference identification capability, and system stability of the integrated sensing system, and reducing measurement misjudgments and interference superposition problems caused by periodic sequences. Attached Figure Description

[0056] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0057] Figure 1 This is an application environment diagram of a reference signal transmission method in one embodiment;

[0058] Figure 2 This is a flowchart illustrating a reference signal transmission method in one embodiment;

[0059] Figure 3 This is a flowchart illustrating the process of determining the first parameter in one embodiment;

[0060] Figure 4 This is a flowchart illustrating the process of determining the global absolute time slot number in one embodiment;

[0061] Figure 5 This is a flowchart illustrating the process of determining the first parameter in another embodiment;

[0062] Figure 6 This is a flowchart illustrating the process of determining the first parameter in yet another embodiment;

[0063] Figure 7 This is a schematic diagram of the process for generating a reference signal sequence in one embodiment;

[0064] Figure 8 This is a flowchart illustrating the process of generating a reference signal sequence in another embodiment;

[0065] Figure 9 This is a flowchart illustrating a partial freezing mechanism in one embodiment;

[0066] Figure 10 This is a flowchart illustrating a reference signal transmission method in another embodiment;

[0067] Figure 11 This is a structural block diagram of a reference signal transmitting device in one embodiment;

[0068] Figure 12 This is a diagram of the internal structure of a network device in one embodiment. Detailed Implementation

[0069] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0070] The reference signal transmission method provided in this application embodiment can be applied to, for example... Figure 1The application environment is shown. Terminal device 101 is a user terminal with wireless sensing, channel measurement, and interference detection capabilities. It supports 5G / 6G integrated sensing communication protocols, can receive reference signal sequences from the base station, and perform sensing services such as delay estimation, Doppler velocity measurement, location awareness, and neighboring cell interference identification based on the sequences. Base station 102 is the core network-side equipment of the 5G / 6G integrated sensing network, possessing high-layer protocol stack scheduling, physical layer signal processing, wireless resource configuration, and signal transmission and reception capabilities.

[0071] In one exemplary embodiment, such as Figure 2 As shown, a reference signal transmission method is provided, which is applied to... Figure 1 Taking base station 102 as an example, the explanation includes the following steps:

[0072] S201, in response to the reference signal transmission request from the terminal device, obtains macroscopic time variables, microscopic time variables, and time slot parameters of the base station.

[0073] Among them, the macroscopic time variable is a cross-frame global time parameter configured and maintained by the higher-level protocol stack. In this embodiment, the macroscopic time variable includes the System Frame Number (SFN) of the current radio frame. This parameter is slowly accumulated and updated frame by frame, and is continuously updated without being reset across radio frames. It is a slow-updating macroscopic variable used to break the traditional 10ms frame period limit of the physical layer and provide a cross-frame randomization reference for the reference signal.

[0074] The micro-time variable is an intra-frame instantaneous timing parameter collected in real time by the base station physical layer. The micro-time variable represents the instantaneous time position of the current radio frame. This variable is refreshed in real time for each symbol and each time slot, and is automatically cleared and reset at the radio frame boundary to ensure the micro-time accuracy of the reference signal generation.

[0075] The time slot parameters of the base station are semi-static configuration parameters preset by the base station system. They are fixed configuration quantities at the cell level, including cell scrambling identifier, preset offset coefficient, time slot configuration period and other system preset configuration parameters. They do not change with frame-level or symbol-level timing and are used to scramble and correct the first parameter and impose rule constraints.

[0076] Optionally, after receiving a sensing measurement request, interference detection request, or uplink sensing measurement request initiated by the terminal device, the base station triggers a reference signal transmission process. It reads layered timing variables and system configuration parameters from the higher-layer protocol stack and physical layer, respectively, to achieve complete acquisition of global macro-time, intra-frame micro-time, and cell fixed configuration parameters. For example, the base station parses the terminal's reference signal transmission request through MAC (Media Access Control) layer signaling to confirm that the terminal needs to perform wireless sensing measurement or interference detection services. Subsequently, it reads the system frame number (SFN) corresponding to the current radio frame from the RRC higher-layer protocol stack as a macro-time variable; simultaneously, it calls the physical layer real-time timing interface to collect micro-time variables; and finally, it reads the time slot parameters fixed locally by the base station.

[0077] S202, determine the first parameter based on macroscopic time variables, microscopic time variables, and time slot parameters.

[0078] The first parameter is the initial seed parameter of the reference signal sequence, which is the driving source for generating the pseudo-random reference signal sequence and determines the random jump pattern and sequence characteristics of the reference signal.

[0079] Optionally, continuous macroscopic time variables across frames, precise microscopic time variables within a frame, and time slot parameters with fixed cell configurations can be integrated to reconstruct the initial seed of the reference signal, i.e., the first parameter. This eliminates the shortcomings of traditional seed's forced reset within 10ms frames and short-cycle repetition, enabling continuous iterative updates of the seed parameters across frames. For example, based on the acquired SFN and microscopic time variables, the single-frame counting limitation can be broken to construct a global absolute time slot count, achieving global temporal continuity. Then, the global absolute time slot count can be weighted, offset, and scrambled in conjunction with the time slot parameters to finally calculate the first parameter (initial seed) used to generate the reference signal.

[0080] S203, Generate a reference signal sequence based on the first parameter and the sequence type of the reference signal sequence to be generated.

[0081] The reference signal sequence to be generated is a baseband sequence format pre-selected by the base station based on the current wireless sensing service scenario, measurement requirements, and anti-interference requirements; this is an inherent attribute of the reference signal. In this embodiment, the sequence type of the reference signal sequence to be generated includes a pseudo-random sequence or a constant envelope sequence. The reference signal sequence is a standardized baseband signal sequence generated by the base station, serving as the reference measurement signal for the 5G / 6G integrated sensing system.

[0082] Optionally, the first parameter can be used as a unique initial seed to match the sequence types required by different sensing services, generating baseband reference signal sequences with randomness, coherence, and low correlation to adapt to diverse sensing and communication needs. For example, the base station determines the reference signal sequence type based on the current service type, including pseudo-random PN sequences, ZC constant envelope sequences, etc.; the unified first parameter is input into the corresponding sequence generation algorithm, and a complete-length baseband reference signal sequence is generated through multi-level shifting and iterative operations, ensuring sequence stability within coherent blocks and random transitions between different frames.

[0083] S204, send a reference signal sequence to the terminal device.

[0084] The reference signal sequence is used by the terminal equipment for wireless sensing measurement and interference detection.

[0085] Optionally, the generated reference signal sequence is processed by resource mapping, filtering, and radio frequency modulation, and then transmitted to the terminal through the downlink physical resource unit to provide a reference signal for terminal sensing measurement and interference detection. After receiving the reference signal sequence, the terminal performs sensing services such as channel estimation, time delay Doppler measurement, interference power detection, and neighboring cell interference differentiation.

[0086] The aforementioned reference signal transmission method, by introducing a high-layer macroscopic time variable SFN combined with a physical layer microscopic time variable and using base station time slot configuration parameters to jointly generate the initial seed of the reference signal, completely eliminates the inherent defects of traditional reference signals, such as forced reset every 10ms wireless frame and periodic repetition of the sequence. It retains the signal timing accuracy brought by intra-frame microscopic timing variables while achieving ultra-long-period random iterative updates of the reference signal sequence through cross-frame macroscopic variables, effectively improving the randomness, uniqueness, and anti-interference performance of the reference signal. Simultaneously, by adapting to different sequence types, it can meet diverse service requirements, significantly improving the measurement accuracy, interference identification capability, and system stability of the integrated sensing system, and reducing measurement misjudgments and interference superposition problems caused by periodic sequences.

[0087] Optionally, in one optional embodiment, the micro-time variables include the current time slot number within the frame and the current symbol number within the time slot. The time slot parameters include the number of time slots per frame, the number of symbols per time slot, and a scrambling code identifier. The current time slot number within the frame is the number of the current time slot within the current radio frame; the current symbol number within the time slot is the number of the current Orthogonal Frequency Division Multiplexing (OFDM) symbol within the current time slot. The number of time slots per frame is the total number of time slots contained in a complete radio frame; the number of symbols per time slot is the total number of OFDM symbols contained in a time slot; and the scrambling code identifier is a cell-specific scrambling ID used to scramble the sequence seed and distinguish reference signals from different cells. Based on this, as... Figure 3 As shown, a method for determining the first parameter is provided, which specifically includes the following steps:

[0088] S301 determines the global absolute time slot number based on SFN, the number of time slots in a single frame, and the current time slot number within the frame.

[0089] Among them, the global absolute timeslot number is no longer limited to counting within a single radio frame. It is a globally unique timeslot number obtained by combining SFN to uniformly arrange all timeslots across frames, eliminating the periodic repetition caused by each frame returning to zero.

[0090] Optionally, SFN can be used to globally accumulate the timeslots of each frame, breaking out of the single-frame counting loop, and converting the local timeslot numbers of the frames into continuous absolute timeslot numbers for the entire network, eliminating the need for count reset at frame boundaries. This value increases continuously in one direction over time and will not be reset to zero at the end of the radio frame.

[0091] S302, determine the first parameter based on the current symbol sequence number in the time slot, the global absolute time slot sequence number, the number of symbols in a single time slot, and the scrambling code identifier.

[0092] Optionally, global time slot information, symbol location information and cell scrambling code can be weighted and fused by bit to map the global continuous time sequence to a unique seed value, so that the seeds corresponding to different frames, different time slots and different symbols are not repeated.

[0093] In this embodiment, the intra-frame slot count is first expanded to a global absolute slot number based on the system frame number, which solves the problem of resetting every frame and periodic repetition of reference signals caused by using only intra-frame parameter counting in the traditional method. Then, the first parameter is obtained by combining the symbol position in the slot with the slot configuration parameters and introducing the cell scrambling code identifier. This not only preserves the micro-time sequence distinguishability brought by the slot and symbol, but also ensures that the cross-frame seed is continuously iterated without looping by relying on the global continuous slots. Different slots and different symbols can generate mutually independent reference signal sequences.

[0094] Optionally, based on the above embodiments, in one embodiment, such as Figure 4 As shown, a method for determining a global absolute time slot number is provided, which specifically includes the following steps:

[0095] S401 determines the cumulative number of time slots across frames based on the product between SFN and the number of time slots per frame.

[0096] Among them, the cumulative number of time slots across frames represents the total frame-level time slot offset.

[0097] Optionally, the product of SFN and the number of time slots per frame can be used as the cumulative number of time slots across frames. For example, the cumulative number of time slots across frames can be expressed by the following formula:

[0098]

[0099] in, This represents the number of time slots per frame.

[0100] S402, determine the global absolute time slot number based on the sum of the cumulative number of time slots across frames and the current time slot number within the frame.

[0101] Optionally, the sum of the cumulative number of time slots across frames and the current time slot number within the frame can be used as the global absolute time slot number. For example, the global absolute time slot number can be expressed by the following formula:

[0102]

[0103] in, This is the global absolute timeslot number; This is the current time slot number within the frame.

[0104] In this embodiment, the cumulative time slot offset across frames is first obtained by multiplying the system frame number by the number of time slots in a single frame, and then the local time slot number within the frame is superimposed to synthesize the global absolute time slot number. This transforms the local time slot count, which was originally reset to zero in each wireless frame, into a globally continuous monotonically increasing time slot number, thus eliminating the problem of periodic looping of the time slot number.

[0105] Optionally, based on the above embodiments, in one embodiment, such as Figure 5 As shown, a method for determining the first parameter is provided, which specifically includes the following steps:

[0106] S501, determine the global absolute symbol number by multiplying the number of symbols in a single time slot and the global absolute time slot number by summing them with the current symbol number within the time slot.

[0107] Among them, the global absolute symbol number is a globally unique symbol number obtained by merging the time slot offset and the symbol position within the time slot. It is not restricted by frame boundaries or time slot boundaries and increases continuously throughout the entire process.

[0108] Optionally, the global absolute symbol number can be obtained by multiplying the number of symbols in a single time slot and the global absolute time slot number, and then summing these products with the current symbol number within the time slot. For example, the global absolute symbol number can be represented by the following formula:

[0109]

[0110] in, The number of symbols per time slot; This is the current symbol number within the time slot, with a value ranging from 0 to 13.

[0111] S502 determines the first parameter based on the global absolute symbol sequence number and scrambling code identifier.

[0112] Optionally, the continuously monotonically increasing global symbol timing sequence can be numerically fused with the cell scrambling code identifier to generate an initial seed that changes continuously over time without periodic repetition, thus fundamentally eliminating the periodicity problem of the reference signal. For example, the first parameter can be expressed by the following formula:

[0113]

[0114] in, The first parameter; This is a scrambling code identifier, which can be the cell ID or a configured scrambling code ID.

[0115] In this embodiment, the cumulative number of time slot-level symbols is first calculated using the global absolute time slot sequence number, and then the local symbol sequence number within the time slot is superimposed to construct the global absolute symbol sequence number. This eliminates the count reset problem caused by the radio frame and time slot boundary, and obtains a monotonically continuous timing reference throughout the process. Then, the global symbol sequence number is jointly calculated with the cell scrambling code identifier to generate the first parameter, so that the first parameter corresponding to different frames, different time slots, and different symbols is not repeated. This effectively avoids self-interference and measurement deviation caused by the periodic repetition of the reference signal, and improves the randomness of the sequence and the inter-cell isolation.

[0116] Optionally, in another alternative embodiment, the micro-temporal variables include the current slot number within the frame and the current symbol number within the slot, and the slot parameters include the number of symbols per slot and the scrambling code identifier; based on this, such as Figure 6 As shown, a method for determining the first parameter is provided, which specifically includes the following steps:

[0117] S601, determine the absolute symbol number within the frame by summing the product of the number of symbols in a single time slot and the current time slot number within the frame with the current symbol number within the time slot.

[0118] The intra-frame absolute symbol number is a continuous symbol number calculated within a single radio frame with the frame start as the zero point, representing the absolute position of the current symbol within the frame.

[0119] Optionally, the product of the number of symbols in a single time slot and the current time slot number within the frame, plus the sum of the current symbol number within the time slot, can be used as the absolute symbol number within the frame.

[0120] S602 determines the first parameter based on the intra-frame absolute symbol number, SFN, and scrambling code identifier.

[0121] Optionally, the intra-frame symbol position can be used as a micro-reference, then superimposed with the frame-level global offset brought by SFN, and finally combined with cell scrambling code for scrambling fusion. This breaks the periodic repetition caused by the count returning to zero in each frame, allowing different seed values ​​to be generated for the same intra-frame position in different radio frames. For example, the first parameter can be expressed by the following formula:

[0122]

[0123] in, Use a predefined offset coefficient (e.g., 214, to avoid conflicts with lower-order variables).

[0124] In this embodiment, the local coordinates of the time slot and symbol levels are first converted into continuous absolute symbol numbers within the frame, ensuring fine differentiation of the timing position within the frame; then, the continuously increasing system frame number across frames is introduced to provide frame-level offset, and the first parameter is calculated together with the cell scrambling code identifier, which solves the problem of frame-by-frame reset and periodic looping of the reference signal caused by relying solely on intra-frame parameters.

[0125] Optionally, in one embodiment, such as Figure 7 As shown, a method for generating a reference signal sequence is provided, which specifically includes the following steps:

[0126] S701, when the sequence type of the reference signal sequence to be generated is a pseudo-random sequence, the first parameter is used as the initial seed of the pseudo-random sequence generator to obtain the pseudo-random bit stream output by the pseudo-random sequence generator.

[0127] Pseudo-random sequences are a commonly used type of reference signal sequence in integrated sensing systems. They possess near-true random statistical characteristics, exhibiting good autocorrelation and cross-correlation properties, and are characterized by high randomness, strong anti-interference capability, and the ability to generate in batches. The pseudo-random sequence generator is a digital sequence generation module built into the base station. It typically employs a linear feedback shift register architecture and is the core computational unit for generating pseudo-random bit streams. Its output sequence is uniquely determined by the initial seed parameters; the output sequence is consistent for the same seed, while the output sequences for different seeds are independent of each other.

[0128] A pseudo-random bitstream is a sequence of 0 and 1 binary numbers output by a pseudo-random sequence generator based on an initial seed iteration operation. It is the original baseband digital signal used to generate the final reference signal sequence.

[0129] Optionally, the base station first identifies the type of the reference signal sequence to be generated. After determining that the sequence type is a pseudo-random sequence, it calls the built-in pseudo-random sequence generator. The first parameter calculated in real time is loaded into the initial position of the sequence generator's register to complete the generator initialization. Then, through preset feedback coefficients and multi-level shift iteration operations, a fixed-length, uniformly distributed pseudo-random binary bit stream is continuously output. The bit streams generated by the seeds corresponding to different time sequences and different cells are independent of each other and do not overlap irregularly.

[0130] S702 performs digital modulation processing on the pseudo-random bitstream to obtain a reference signal sequence.

[0131] Optionally, since the pseudo-random bitstream is a binary digital signal, it cannot be directly used for wireless radio frequency transmission. This step uses a standardized digital modulation method to map discrete 0 and 1 bits into complex baseband symbols, completing the conversion from digital bits to transmission symbols and generating a standardized reference signal sequence that is compatible with OFDM system transmission and can be used for inductive measurements. For example, the base station selects the corresponding digital modulation method according to the cell's preset modulation configuration or service scenario requirements, and performs group mapping and amplitude and phase modulation on the pseudo-random bitstream, such as QPSK or pi / 2-BPSK modulation, to convert the binary bit sequence into a complex baseband symbol sequence. At the same time, according to the reference signal resource length requirements, the modulated symbols are truncated or padded and normalized, finally generating a complete reference signal sequence with a standardized format that is compatible with physical layer resource mapping.

[0132] In this embodiment, for the generation scenario of pseudo-random reference signals, the first parameter, which is calculated dynamically in real time, is used as the initial seed of the sequence generator. Based on the characteristics of the first parameter being cross-frame, without time slot reset, and unique in the cell, the generated pseudo-random bit stream has the characteristics of global non-periodic repetition, excellent randomness, and high inter-cell isolation. This makes the perceived reference signal on multiple OFDM symbols transmitted across frames exhibit perfect white noise characteristics, and completely eliminates cross-correlation grating lobes within the CPI of dozens of radio frames.

[0133] Optionally, in another alternative embodiment, such as Figure 8 As shown, another method for generating a reference signal sequence is provided, which specifically includes the following steps:

[0134] S801, when the sequence type of the reference signal sequence to be generated is a constant envelope sequence, generate pseudo-random control bits according to the first parameter.

[0135] Among them, the constant envelope sequence refers to the ZC (Zadoff-Chu) sequence in the inductive system. It is a class of orthogonal sequences with constant amplitude and extremely low peak-to-average power ratio, possessing ideal periodic autocorrelation and low cross-correlation characteristics. The pseudo-random control bits are a set of binary random bit sequences generated by the first parameter. They are not used as transmitted data, but only as parameter control words to dynamically control the generation parameters of the constant envelope sequence.

[0136] Optionally, the base station first identifies the reference signal type corresponding to the current service. After determining that it is a constant envelope sequence type, it inputs the first parameter calculated in real time into the pseudo-random sequence generator. Through register iteration, bit expansion and normalization, a pseudo-random control bit with a fixed bit width and uniform distribution is generated. This set of control bits changes continuously with the first parameter across frames and does not have periodic repetition.

[0137] S802 extracts the transition parameters from the pseudo-random control bits and updates the root index of the constant envelope sequence based on the extracted transition parameters.

[0138] The jump parameters are index control variables and shift control variables extracted and parsed from the pseudo-random control bits. They are used to dynamically update the root index and cyclic offset of the ZC sequence, respectively, to achieve random jumps in the sequence over time. The root index is the core generation parameter of the constant envelope sequence, and different root indices correspond to completely different basic sequence waveforms.

[0139] Optionally, the base station extracts a consecutive 8-bit control field from the pseudo-random control bits at the time sequence unit granularity, and calculates the frequency hopping using the standard group formula:

[0140]

[0141] The real-time root index of the ZC sequence is obtained by dynamically mapping the group frequency hopping values; the parameter jump is continuously updated across frames with the first parameter, without periodic repetition.

[0142] S803, substitute the updated root index into the preset sequence analysis formula to obtain the reference signal sequence.

[0143] Among them, the preset sequence analytical formula is the standard ZC sequence mathematical generation formula that is fixed locally in the base station. It is the industry-standard constant envelope sequence iterative analytical formula. The output sequence can be uniquely determined by inputting the root index and the sequence length.

[0144] Optionally, the base station obtains the real-time updated root index and cyclic shift phase factor, and substitutes them into the preset standard sequence analytical expression along with the ZC sequence length:

[0145]

[0146] in, is the length of the ZC sequence. This is the root index.

[0147] In this embodiment, for constant envelope sequences, an indirect parameter jump control mechanism based on dynamic first parameter is used to grow a pseudo-random control bit stream with a growth cycle. The root index of the ZC sequence is dynamically updated by relying on group frequency hopping operation. Finally, a jump sequence is generated through a standard analytical expression, which fully preserves the advantages of ZC sequences such as high-precision timing focus, low interference, and high orthogonality.

[0148] Optionally, in one embodiment, a coherent block adaptation method is provided. Specifically, when the measurement requirement of the terminal is determined to be coherent cumulative measurement based on the reference signal transmission request, a preset number of consecutive symbols are taken as a sensing coherent block; wherein, within the same sensing coherent block, the first parameters corresponding to the reference signal sequences carried by different symbols are the same. To meet the stringent requirements of high-precision sensing algorithms (multi-continuous symbol fast Fourier transform FFT Doppler extraction algorithm) on signal coherence, a local freezing adaptive optimization mechanism is added on the basis of long-term sequence randomization. When determining that the terminal measurement requirement is a high-precision sensing measurement scenario such as coherent accumulation and Doppler frequency domain resolution based on the reference signal transmission request, N consecutive OFDM symbols in the time domain are divided into a Sensing Coherent Block (SCB). An intra-block parameter freezing strategy is implemented: when calculating the first parameter within the coherent block, symbol-level micro-time variables such as the symbol sequence number within the time slot are ignored, and the core calculation parameters remain unchanged, ensuring that the first parameter, pseudo-random control bits, and ZC sequence transition parameters corresponding to all symbols within the same sensing coherent block are completely consistent. Simultaneously, an inter-block dynamic transition strategy is implemented: at the switching node between adjacent sensing coherent blocks, the first parameter is updated based on the SFN, restoring the global pseudo-random transition characteristics of the sequence. This embodiment provides the system with great flexibility, providing coherent repetitive waveforms that are extremely friendly to radar receiving algorithms (reducing computational power) and transmitter RF within the block, while utilizing cross-block / cross-frame SFN transitions to ensure the anti-interference baseline of the cellular network. For example, as shown... Figure 9 The diagram shown is a schematic of the local freezing mechanism provided in an embodiment of this application.

[0149] Figure 10 This is a flowchart illustrating a reference signal transmission method in another embodiment. Based on the above embodiments, this embodiment provides an optional example of a reference signal transmission method. (In conjunction with...) Figure 10 The specific implementation process is as follows:

[0150] S1001, in response to the reference signal transmission request of the terminal device, obtains the system frame number SFN of the current radio frame, the current time slot number within the frame, the current symbol number within the time slot, the number of time slots per frame, the number of symbols per time slot, and the scrambling code identifier.

[0151] S1002 determines the cumulative number of time slots across frames based on the product between SFN and the number of time slots per frame.

[0152] S1003, determine the global absolute time slot number based on the sum of the cumulative number of time slots across frames and the current time slot number within the frame.

[0153] S1004. Determine the global absolute symbol number by multiplying the number of symbols in a single time slot and the global absolute time slot number by summing them with the current symbol number within the time slot.

[0154] S1005, determine the first parameter based on the global absolute symbol sequence number and scrambling code identifier.

[0155] S1006, Generate a reference signal sequence based on the first parameter and the sequence type of the reference signal sequence to be generated.

[0156] S1007, send a reference signal sequence to the terminal device.

[0157] The reference signal sequence is used by the terminal equipment for wireless sensing measurement and interference detection.

[0158] The specific processes of S1001-S1007 described above can be found in the description of the above method embodiments. Their implementation principles and technical effects are similar, and will not be repeated here.

[0159] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0160] Based on the same inventive concept, this application also provides a reference signal transmitting apparatus for implementing the reference signal transmitting method described above. The solution provided by this apparatus is similar to the implementation described in the above method; therefore, the specific limitations in one or more reference signal transmitting apparatus embodiments provided below can be found in the limitations of the reference signal transmitting method described above, and will not be repeated here.

[0161] In one exemplary embodiment, such as Figure 11As shown, a reference signal transmitting device 1100 is provided, configured in a base station, including: a parameter acquisition module 1101, a parameter determination module 1102, a sequence generation module 1103, and a sequence transmitting module 1104, wherein:

[0162] The parameter acquisition module 1101 is used to acquire macroscopic time variables, microscopic time variables and time slot parameters of the base station in response to the reference signal transmission request of the terminal device; wherein, the macroscopic time variables include the system frame number SFN of the current radio frame, and the microscopic time variables represent the instantaneous time position of the current radio frame;

[0163] The parameter determination module 1102 is used to determine the first parameter based on the macroscopic time variable, the microscopic time variable, and the time slot parameter;

[0164] The sequence generation module 1103 is used to generate the reference signal sequence according to the first parameter and the sequence type of the reference signal sequence to be generated;

[0165] The sequence transmission module 1104 is used to transmit the reference signal sequence to the terminal device; wherein the reference signal sequence is used by the terminal device to perform wireless sensing measurement and interference detection.

[0166] In one embodiment, the micro-temporal variables include the current time slot number within the frame and the current symbol number within the time slot, and the time slot parameters include the number of time slots per frame, the number of symbols per time slot, and the scrambling code identifier; the parameter determination module 1102 includes:

[0167] The sequence number determination unit is used to determine the global absolute time slot number based on the SFN, the number of time slots in a single frame, and the current time slot number within the frame;

[0168] The parameter determination unit is used to determine the first parameter based on the current symbol sequence number in the time slot, the global absolute time slot sequence number, the number of symbols in a single time slot, and the scrambling code identifier.

[0169] In one embodiment, the sequence number determination unit is specifically used for:

[0170] The cross-frame cumulative time slot number is determined by multiplying the SFN and the single-frame time slot number; the global absolute time slot number is determined by summing the cross-frame cumulative time slot number and the current time slot number within the frame.

[0171] In one embodiment, the parameter determination unit is specifically used for:

[0172] The global absolute symbol number is determined by multiplying the single-slot symbol number and the global absolute slot number by the sum of the current symbol number within the slot; the first parameter is determined by the global absolute symbol number and the scrambling code identifier.

[0173] In one embodiment, the micro-temporal variables include the current slot number within the frame and the current symbol number within the slot; the slot parameters include the number of symbols per slot and the scrambling code identifier; the parameter determination module 1102 is specifically used for:

[0174] The intra-frame absolute symbol number is determined by multiplying the single-slot symbol number and the intra-frame current slot number by the sum of the intra-slot current symbol number; the first parameter is determined by the intra-frame absolute symbol number, SFN, and scrambling code identifier.

[0175] In one embodiment, the sequence generation module 1103 is specifically used for:

[0176] When the sequence type of the reference signal sequence to be generated is a pseudo-random sequence, the first parameter is used as the initial seed of the pseudo-random sequence generator to obtain the pseudo-random bit stream output by the pseudo-random sequence generator; the pseudo-random bit stream is digitally modulated to obtain the reference signal sequence.

[0177] In one embodiment, the sequence generation module 1103 is further configured to:

[0178] When the sequence type of the reference signal sequence to be generated is a constant envelope sequence, pseudo-random control bits are generated according to the first parameter; transition parameters are extracted from the pseudo-random control bits, and the root index of the constant envelope sequence is updated according to the extracted transition parameters; the updated root index is substituted into the preset sequence analytical expression to obtain the reference signal sequence.

[0179] In one embodiment, the reference signal transmitting device 1100 further includes a local freezing module, used for:

[0180] When the measurement requirement of the terminal is determined to be coherent cumulative measurement based on the reference signal transmission request, a preset number of consecutive symbols are taken as a sensing coherent block; wherein, within the same sensing coherent block, the first parameter corresponding to the reference signal sequence carried by different symbols is the same.

[0181] Each module in the aforementioned reference signal transmitting device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in hardware within or independently of the processor in the network device, or stored in software within the memory of the network device, so that the processor can call and execute the operations corresponding to each module.

[0182] In one embodiment, a network device is provided, which may be a base station, and its internal structure diagram may be as follows: Figure 12As shown, the network device includes a processor, memory, communication interface, display screen, and input device connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When executed by the processor, the computer program implements a reference signal transmission method.

[0183] Those skilled in the art will understand that Figure 12 The structure shown is merely a block diagram of a portion of the structure related to the solution of this application and does not constitute a limitation on the network device to which the solution of this application is applied. Specific network devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0184] In one exemplary embodiment, a network device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0185] In response to the reference signal transmission request from the terminal device, macroscopic time variables, microscopic time variables, and time slot parameters of the base station are obtained; among them, macroscopic time variables include the system frame number (SFN) of the current radio frame, and microscopic time variables represent the instantaneous time position of the current radio frame;

[0186] The first parameter is determined based on macroscopic time variables, microscopic time variables, and time slot parameters;

[0187] Generate a reference signal sequence based on the first parameter and the sequence type of the reference signal sequence to be generated;

[0188] A reference signal sequence is sent to the terminal device; wherein the reference signal sequence is used by the terminal device to perform wireless sensing measurement and interference detection.

[0189] In one embodiment, the micro-time variables include the current time slot number within the frame and the current symbol number within the time slot, and the time slot parameters include the number of time slots per frame, the number of symbols per time slot, and the scrambling code identifier; when the processor executes the computer program to determine the first parameter based on the macro-time variables, micro-time variables, and time slot parameters, it also performs the following steps:

[0190] The global absolute time slot number is determined based on the SFN, the number of time slots in a single frame, and the current time slot number within the frame; the first parameter is determined based on the current symbol number within the time slot, the global absolute time slot number, the number of symbols in a single time slot, and the scrambling code identifier.

[0191] In one embodiment, when the processor executes a computer program to determine the global absolute time slot number based on the SFN, the number of time slots per frame, and the current time slot number within the frame, it also performs the following steps:

[0192] The cumulative number of time slots across frames is determined by multiplying the SFN and the number of time slots in a single frame; the global absolute time slot number is determined by summing the cumulative number of time slots across frames and the current time slot number within the frame.

[0193] In one embodiment, when the processor executes a computer program to determine the first parameter based on the current symbol sequence number within the time slot, the global absolute time slot sequence number, the number of symbols per time slot, and the scrambling code identifier, it also performs the following steps:

[0194] The global absolute symbol number is determined by multiplying the number of symbols in a single time slot and the global absolute time slot number by summing them with the current symbol number within the time slot; the first parameter is determined by the global absolute symbol number and the scrambling code identifier.

[0195] In one embodiment, the micro-time variables include the current time slot number within the frame and the current symbol number within the time slot, and the time slot parameters include the number of symbols per time slot and the scrambling code identifier; when the processor executes the computer program to determine the first parameter based on the macro-time variables, micro-time variables, and time slot parameters, it also performs the following steps:

[0196] The absolute symbol number within the frame is determined by multiplying the number of symbols in a single time slot and the current time slot number within the frame, and summing these with the current symbol number within the time slot; the first parameter is determined by the absolute symbol number within the frame, the SFN, and the scrambling code identifier.

[0197] In one embodiment, when the processor executes a computer program to generate a reference signal sequence based on a first parameter and the sequence type of the reference signal sequence to be generated, it also performs the following steps:

[0198] When the reference signal sequence to be generated is a pseudo-random sequence, the first parameter is used as the initial seed of the pseudo-random sequence generator to obtain the pseudo-random bit stream output by the pseudo-random sequence generator; the pseudo-random bit stream is digitally modulated to obtain the reference signal sequence.

[0199] In one embodiment, when the processor executes a computer program to generate a reference signal sequence based on a first parameter and the sequence type of the reference signal sequence to be generated, it also performs the following steps:

[0200] When the sequence type of the reference signal sequence to be generated is a constant envelope sequence, pseudo-random control bits are generated according to the first parameter; transition parameters are extracted from the pseudo-random control bits, and the root index of the constant envelope sequence is updated according to the extracted transition parameters; the updated root index is substituted into the preset sequence analytical expression to obtain the reference signal sequence.

[0201] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0202] When the measurement requirement of the terminal is determined to be coherent cumulative measurement based on the reference signal transmission request, a preset number of consecutive symbols are taken as a sensing coherent block; wherein, within the same sensing coherent block, the first parameter corresponding to the reference signal sequence carried by different symbols is the same.

[0203] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program performing the following steps when executed by a processor:

[0204] In response to the reference signal transmission request from the terminal device, macroscopic time variables, microscopic time variables, and time slot parameters of the base station are obtained; among them, macroscopic time variables include the system frame number (SFN) of the current radio frame, and microscopic time variables represent the instantaneous time position of the current radio frame;

[0205] The first parameter is determined based on macroscopic time variables, microscopic time variables, and time slot parameters;

[0206] Generate a reference signal sequence based on the first parameter and the sequence type of the reference signal sequence to be generated;

[0207] A reference signal sequence is sent to the terminal device; wherein the reference signal sequence is used by the terminal device to perform wireless sensing measurement and interference detection.

[0208] In one embodiment, the micro-time variables include the current time slot number within the frame and the current symbol number within the time slot, and the time slot parameters include the number of time slots per frame, the number of symbols per time slot, and the scrambling code identifier; when the processor executes the computer program to determine the first parameter based on the macro-time variables, micro-time variables, and time slot parameters, it also performs the following steps:

[0209] The global absolute time slot number is determined based on the SFN, the number of time slots in a single frame, and the current time slot number within the frame; the first parameter is determined based on the current symbol number within the time slot, the global absolute time slot number, the number of symbols in a single time slot, and the scrambling code identifier.

[0210] In one embodiment, when the processor executes a computer program to determine the global absolute time slot number based on the SFN, the number of time slots per frame, and the current time slot number within the frame, it also performs the following steps:

[0211] The cumulative number of time slots across frames is determined by multiplying the SFN and the number of time slots in a single frame; the global absolute time slot number is determined by summing the cumulative number of time slots across frames and the current time slot number within the frame.

[0212] In one embodiment, when the processor executes a computer program to determine the first parameter based on the current symbol sequence number within the time slot, the global absolute time slot sequence number, the number of symbols per time slot, and the scrambling code identifier, it also performs the following steps:

[0213] The global absolute symbol number is determined by multiplying the number of symbols in a single time slot and the global absolute time slot number by summing them with the current symbol number within the time slot; the first parameter is determined by the global absolute symbol number and the scrambling code identifier.

[0214] In one embodiment, the micro-time variables include the current time slot number within the frame and the current symbol number within the time slot, and the time slot parameters include the number of symbols per time slot and the scrambling code identifier; when the processor executes the computer program to determine the first parameter based on the macro-time variables, micro-time variables, and time slot parameters, it also performs the following steps:

[0215] The absolute symbol number within the frame is determined by multiplying the number of symbols in a single time slot and the current time slot number within the frame, and summing these with the current symbol number within the time slot; the first parameter is determined by the absolute symbol number within the frame, the SFN, and the scrambling code identifier.

[0216] In one embodiment, when the processor executes a computer program to generate a reference signal sequence based on a first parameter and the sequence type of the reference signal sequence to be generated, it also performs the following steps:

[0217] When the reference signal sequence to be generated is a pseudo-random sequence, the first parameter is used as the initial seed of the pseudo-random sequence generator to obtain the pseudo-random bit stream output by the pseudo-random sequence generator; the pseudo-random bit stream is digitally modulated to obtain the reference signal sequence.

[0218] In one embodiment, when the processor executes a computer program to generate a reference signal sequence based on a first parameter and the sequence type of the reference signal sequence to be generated, it also performs the following steps:

[0219] When the sequence type of the reference signal sequence to be generated is a constant envelope sequence, pseudo-random control bits are generated according to the first parameter; transition parameters are extracted from the pseudo-random control bits, and the root index of the constant envelope sequence is updated according to the extracted transition parameters; the updated root index is substituted into the preset sequence analytical expression to obtain the reference signal sequence.

[0220] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0221] When the measurement requirement of the terminal is determined to be coherent cumulative measurement based on the reference signal transmission request, a preset number of consecutive symbols are taken as a sensing coherent block; wherein, within the same sensing coherent block, the first parameter corresponding to the reference signal sequence carried by different symbols is the same.

[0222] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, performs the following steps:

[0223] In response to the reference signal transmission request from the terminal device, macroscopic time variables, microscopic time variables, and time slot parameters of the base station are obtained; among them, macroscopic time variables include the system frame number (SFN) of the current radio frame, and microscopic time variables represent the instantaneous time position of the current radio frame;

[0224] The first parameter is determined based on macroscopic time variables, microscopic time variables, and time slot parameters;

[0225] Generate a reference signal sequence based on the first parameter and the sequence type of the reference signal sequence to be generated;

[0226] A reference signal sequence is sent to the terminal device; wherein the reference signal sequence is used by the terminal device to perform wireless sensing measurement and interference detection.

[0227] In one embodiment, the micro-time variables include the current time slot number within the frame and the current symbol number within the time slot, and the time slot parameters include the number of time slots per frame, the number of symbols per time slot, and the scrambling code identifier; when the processor executes the computer program to determine the first parameter based on the macro-time variables, micro-time variables, and time slot parameters, it also performs the following steps:

[0228] The global absolute time slot number is determined based on the SFN, the number of time slots in a single frame, and the current time slot number within the frame; the first parameter is determined based on the current symbol number within the time slot, the global absolute time slot number, the number of symbols in a single time slot, and the scrambling code identifier.

[0229] In one embodiment, when the processor executes a computer program to determine the global absolute time slot number based on the SFN, the number of time slots per frame, and the current time slot number within the frame, it also performs the following steps:

[0230] The cumulative number of time slots across frames is determined by multiplying the SFN and the number of time slots in a single frame; the global absolute time slot number is determined by summing the cumulative number of time slots across frames and the current time slot number within the frame.

[0231] In one embodiment, when the processor executes a computer program to determine the first parameter based on the current symbol sequence number within the time slot, the global absolute time slot sequence number, the number of symbols per time slot, and the scrambling code identifier, it also performs the following steps:

[0232] The global absolute symbol number is determined by multiplying the number of symbols in a single time slot and the global absolute time slot number by summing them with the current symbol number within the time slot; the first parameter is determined by the global absolute symbol number and the scrambling code identifier.

[0233] In one embodiment, the micro-time variables include the current time slot number within the frame and the current symbol number within the time slot, and the time slot parameters include the number of symbols per time slot and the scrambling code identifier; when the processor executes the computer program to determine the first parameter based on the macro-time variables, micro-time variables, and time slot parameters, it also performs the following steps:

[0234] The absolute symbol number within the frame is determined by multiplying the number of symbols in a single time slot and the current time slot number within the frame, and summing these with the current symbol number within the time slot; the first parameter is determined by the absolute symbol number within the frame, the SFN, and the scrambling code identifier.

[0235] In one embodiment, when the processor executes a computer program to generate a reference signal sequence based on a first parameter and the sequence type of the reference signal sequence to be generated, it also performs the following steps:

[0236] When the reference signal sequence to be generated is a pseudo-random sequence, the first parameter is used as the initial seed of the pseudo-random sequence generator to obtain the pseudo-random bit stream output by the pseudo-random sequence generator; the pseudo-random bit stream is digitally modulated to obtain the reference signal sequence.

[0237] In one embodiment, when the processor executes a computer program to generate a reference signal sequence based on a first parameter and the sequence type of the reference signal sequence to be generated, it also performs the following steps:

[0238] When the sequence type of the reference signal sequence to be generated is a constant envelope sequence, pseudo-random control bits are generated according to the first parameter; transition parameters are extracted from the pseudo-random control bits, and the root index of the constant envelope sequence is updated according to the extracted transition parameters; the updated root index is substituted into the preset sequence analytical expression to obtain the reference signal sequence.

[0239] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0240] When the measurement requirement of the terminal is determined to be coherent cumulative measurement based on the reference signal transmission request, a preset number of consecutive symbols are taken as a sensing coherent block; wherein, within the same sensing coherent block, the first parameter corresponding to the reference signal sequence carried by different symbols is the same.

[0241] It should be noted that the data involved in this application (including but not limited to data used for analysis, data stored, data displayed, etc.) are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0242] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0243] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0244] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for transmitting a reference signal, characterized in that, Applied to a base station, the method includes: In response to a reference signal transmission request from a terminal device, macroscopic time variables, microscopic time variables, and time slot parameters of the base station are obtained; wherein, the macroscopic time variables include the system frame number (SFN) of the current radio frame, and the microscopic time variables represent the instantaneous time position of the current radio frame; The first parameter is determined based on the macroscopic time variable, the microscopic time variable, and the time slot parameter; The reference signal sequence is generated based on the first parameter and the sequence type of the reference signal sequence to be generated; The reference signal sequence is sent to the terminal device; wherein the reference signal sequence is used by the terminal device to perform wireless sensing measurement and interference detection.

2. The method according to claim 1, characterized in that, The micro-time variables include the current time slot number within the frame and the current symbol number within the time slot, and the time slot parameters include the number of time slots per frame, the number of symbols per time slot, and the scrambling code identifier; The step of determining the first parameter based on the macroscopic time variable, the microscopic time variable, and the time slot parameter includes: The global absolute time slot number is determined based on the SFN, the number of time slots in a single frame, and the current time slot number within the frame; The first parameter is determined based on the current symbol number within the time slot, the global absolute time slot number, the number of symbols in a single time slot, and the scrambling code identifier.

3. The method according to claim 2, characterized in that, The step of determining the global absolute time slot number based on the SFN, the number of time slots in a single frame, and the current time slot number within the frame includes: The cumulative number of time slots across frames is determined by multiplying the SFN and the number of time slots in a single frame. The global absolute time slot number is determined based on the sum of the cumulative time slot number across frames and the current time slot number within the frame.

4. The method according to claim 2, characterized in that, The step of determining the first parameter based on the current symbol sequence number within the time slot, the global absolute time slot sequence number, the number of symbols per time slot, and the scrambling code identifier includes: The global absolute symbol number is determined by summing the product of the single-slot symbol number and the global absolute slot number with the current symbol number within the slot. The first parameter is determined based on the global absolute symbol number and the scrambling code identifier.

5. The method according to claim 1, characterized in that, The micro-time variables include the current time slot number within the frame and the current symbol number within the time slot; the time slot parameters include the number of symbols per time slot and the scrambling code identifier. The step of determining the first parameter based on the macroscopic time variable, the microscopic time variable, and the time slot parameter includes: The absolute symbol number within the frame is determined by summing the product of the single time slot symbol number and the current time slot number within the frame with the current symbol number within the time slot. The first parameter is determined based on the intra-frame absolute symbol number, SFN, and scrambling code identifier.

6. The method according to claim 1, characterized in that, The step of generating the reference signal sequence based on the first parameter and the sequence type of the reference signal sequence to be generated includes: When the sequence type of the reference signal sequence to be generated is a pseudo-random sequence, the first parameter is used as the initial seed of the pseudo-random sequence generator to obtain the pseudo-random bit stream output by the pseudo-random sequence generator. The pseudo-random bitstream is digitally modulated to obtain a reference signal sequence.

7. The method according to claim 1, characterized in that, The step of generating the reference signal sequence based on the first parameter and the sequence type of the reference signal sequence to be generated includes: When the sequence type of the reference signal sequence to be generated is a constant envelope sequence, pseudo-random control bits are generated according to the first parameter; The jump parameters are extracted from the pseudo-random control bits, and the root index of the constant envelope sequence is updated according to the extracted jump parameters; Substitute the updated root index into the preset sequence analysis formula to obtain the reference signal sequence.

8. The method according to any one of claims 1-7, characterized in that, The method further includes: If the measurement requirement of the terminal is determined to be coherent cumulative measurement based on the reference signal transmission request, a preset number of consecutive symbols are taken as a sensing coherent block; Within the same sensing coherent block, the first parameter of the reference signal sequence carried by different symbols is the same.

9. A reference signal transmitting device, characterized in that, Configured in a base station, the device includes: The parameter acquisition module is used to acquire macroscopic time variables, microscopic time variables, and time slot parameters of the base station in response to the reference signal transmission request of the terminal device; wherein, the macroscopic time variables include the system frame number (SFN) of the current radio frame, and the microscopic time variables represent the instantaneous time position of the current radio frame; The parameter determination module is used to determine the first parameter based on the macroscopic time variable, the microscopic time variable, and the time slot parameter; A sequence generation module is used to generate the reference signal sequence according to the first parameter and the sequence type of the reference signal sequence to be generated; A sequence transmission module is used to transmit the reference signal sequence to the terminal device; wherein the reference signal sequence is used by the terminal device to perform wireless sensing measurement and interference detection.

10. A network device comprising a memory and a processor, the memory storing a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 8.

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