Perception method, device and system

Abstract

The invention relates to a sensing method, a sensing device and a sensing system. The sensing method comprises the following steps: a transmitter determines a pre-coding vector for cyclic shift, wherein the pre-coding vector comprises cyclic shift information of a plurality of sensing reference signal ports; executing cyclic shift precoding of the plurality of perceptual reference signal ports according to the precoding vector and a modulation symbol, wherein the modulation symbol is a symbol mapped to a resource element after a first sequence is subjected to constellation modulation; and sending a sensing reference signal according to the transmission signal vector after cyclic shift precoding. According to the embodiment of the invention, sensing reference signals of different ports can be simultaneously sent by using different beams on the same time-frequency resource, simultaneous scanning of multiple beams can be supported, and relatively low time-frequency resource overhead can be maintained.

Description

Perception method, device and perception system Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a perception method, device, and system. Background Art

[0002] In wireless sensing, it is usually necessary to estimate the distance, azimuth angle, and speed of the sensing target. In order to achieve wireless sensing, it is usually necessary to send a reference signal for sensing.

[0003] Summary of the Invention

[0004] The embodiments of the present disclosure provide a perception method, a device, and a perception system.

[0005] According to a first aspect of an embodiment of the present disclosure, a sensing method is proposed, which is performed by a transmitter. The method includes:

[0006] Determining a precoding vector for cyclic shift, wherein the precoding vector includes cyclic shift information of a plurality of perceptual reference signal ports;

[0007] Performing cyclic shift precoding of the multiple perception reference signal ports according to the precoding vector and the modulation symbol, wherein the modulation symbol is a symbol of the first sequence mapped to the resource element after constellation modulation;

[0008] The perception reference signal is sent according to the transmit signal vector after cyclic shift precoding.

[0009] According to a second aspect of an embodiment of the present disclosure, a sensing method is proposed, which is performed by a receiver. The method includes:

[0010] receiving a sensing reference signal;

[0011] The perception reference signal is a transmitter that performs cyclic shift precoding on multiple perception reference signal ports based on a modulation symbol and a precoding vector for cyclic shift, and sends the signal according to the transmitted signal vector after cyclic shift precoding. The precoding vector contains cyclic shift information of the multiple perception reference signal ports, and the modulation symbol is a symbol of the first sequence mapped to the resource element after constellation modulation.

[0012] According to a third aspect of an embodiment of the present disclosure, a transmitter is provided, including:

[0013] a processing module configured to determine a precoding vector for cyclic shift, the precoding vector including cyclic shift information of multiple perception reference signal ports, and configured to perform cyclic shift precoding of the multiple perception reference signal ports according to the precoding vector and a modulation symbol, the modulation symbol being a symbol of a first sequence mapped to a resource element after constellation modulation;

[0014] The transceiver module is configured to send a perception reference signal according to a transmit signal vector after cyclic shift precoding.

[0015] According to a fourth aspect of the embodiments of the present disclosure, a receiver is provided, including:

[0016] a transceiver module configured to receive a sensing reference signal;

[0017] The perception reference signal is a transmitter that performs cyclic shift precoding on multiple perception reference signal ports based on a modulation symbol and a precoding vector for cyclic shift, and sends the signal according to the transmitted signal vector after cyclic shift precoding. The precoding vector contains cyclic shift information of the multiple perception reference signal ports, and the modulation symbol is a symbol of the first sequence mapped to the resource element after constellation modulation.

[0018] According to a fifth aspect of an embodiment of the present disclosure, a sensing device is provided, including:

[0019] One or more processors; wherein, the perception device is used to execute the perception method proposed in the first aspect of the embodiment of the present disclosure.

[0020] According to a sixth aspect of an embodiment of the present disclosure, a sensing device is provided, including:

[0021] One or more processors; wherein, the perception device is used to execute the perception method proposed in the second aspect of the embodiment of this disclosure.

[0022] According to a seventh aspect of the embodiments of the present disclosure, a perception system is provided, including:

[0023] A transmitter, configured to execute the sensing method proposed in the first aspect of the embodiments of the present disclosure;

[0024] A receiver is used to execute the perception method proposed in the second aspect of the embodiment of the present disclosure.

[0025] According to the eighth aspect of the embodiment of the present disclosure, a storage medium is proposed, which stores instructions. When the instructions are executed on a communication device, the communication device executes the perception method proposed in the first aspect of the embodiment of the present disclosure or the perception method proposed in the second aspect of the embodiment of the present disclosure.

[0026] In the embodiment of the present disclosure, different ports of the perception reference signal can occupy the same time-frequency resources. The different ports of the perception reference signal are cyclically shifted according to the precoding vector used for cyclic shift and the modulation symbol mapped to the resource element. The perception reference signals of different ports can be sent simultaneously on the same time-frequency resources using different beams. This supports simultaneous scanning of multiple beams and maintains a low time-frequency resource overhead. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following drawings required for describing the embodiments are introduced. The following drawings are merely some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

[0028] FIG1 is an exemplary schematic diagram of the architecture of a perception system provided according to an embodiment of the present disclosure.

[0029] FIG2 is an exemplary interaction diagram of a perception method provided according to an embodiment of the present disclosure.

[0030] FIG3A is an exemplary schematic diagram of a perception method provided according to an embodiment of the present disclosure.

[0031] FIG3B is an exemplary schematic diagram of a perception method provided according to an embodiment of the present disclosure.

[0032] FIG3C is an exemplary schematic diagram of a perception method provided according to an embodiment of the present disclosure.

[0033] FIG4A is an exemplary schematic diagram of a perception method provided according to an embodiment of the present disclosure.

[0034] FIG4B is an exemplary schematic diagram of a perception method provided according to an embodiment of the present disclosure.

[0035] FIG5A is an exemplary schematic diagram of the structure of a transmitter provided according to an embodiment of the present disclosure.

[0036] FIG5B is an exemplary schematic diagram of the structure of a receiver provided according to an embodiment of the present disclosure.

[0037] FIG6A is an exemplary schematic diagram of the structure of a communication device provided according to an embodiment of the present disclosure.

[0038] FIG6B is an exemplary schematic diagram of the structure of a chip provided according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0039] The embodiments of the present disclosure provide a perception method, a device, and a perception system.

[0040] In a first aspect, an embodiment of the present disclosure provides a sensing method, performed by a transmitter, comprising:

[0041] Determining a precoding vector for cyclic shift, wherein the precoding vector includes cyclic shift information of a plurality of perceptual reference signal ports;

[0042] Performing cyclic shift precoding of the multiple perception reference signal ports according to the precoding vector and the modulation symbol, wherein the modulation symbol is a symbol of the first sequence mapped to the resource element after constellation modulation;

[0043] The perception reference signal is sent according to the transmit signal vector after cyclic shift precoding.

[0044] In the above embodiment, different ports of the perception reference signal can occupy the same time-frequency resources, wherein each port of the perception reference signal can be referred to as a perception reference signal port. According to the precoding vector used for cyclic shift and the modulation symbol mapped to the resource element, different ports of the perception reference signal are cyclically shifted, and multiple ports of the perception reference signal can be multiplexed. Therefore, perception reference signals of different ports can be sent simultaneously using different beams on the same time-frequency resources. On the one hand, it supports simultaneous scanning of multiple beams, and on the other hand, it can maintain a low time-frequency resource overhead. For example, based on the symbol of each perception reference signal port after cyclic shift precoding, the transmission signal vector on each resource element where the perception reference signal is located can be determined. The transmission signal vector can also be referred to as a perception reference signal vector, wherein the transmission signal vector is N Tx dimensional vectors, corresponding to the N Tx Taking a resource element as an example, according to the transmitted signal vector of the sensing reference signal on the resource element, N Tx The transmitting antennas (or antenna ports) transmit the multi-port sensing reference signal on the resource element.

[0045] In conjunction with some embodiments of the first aspect, in some embodiments, the transmitted signal vector satisfies: x(k, l)=β sensingRS ·W·w cdd (k)·r(k, l);

[0046] Wherein, (k, l) represents the resource element of the orthogonal frequency division multiplexing (OFDM) symbol numbered l and the OFDM subcarrier numbered k, x(k, l) is the transmitted signal vector of the perception reference signal on the resource element (k, l), β sensingRS is the power scaling factor, W is the spatial precoding matrix, w cdd(k) is the precoding vector acting on the OFDM subcarrier numbered k, and r(k, l) is the modulation symbol mapped to the resource element (k, l).

[0047] In the above embodiment, taking a resource element (k, l) as an example, to determine the transmitted signal vector on the resource element (k, l), at least the precoding vector w cdd (k) and the modulation symbol r(k, l) are cyclically shifted and precoded, and spatial precoding is performed based on the spatial precoding matrix W to achieve spatial shaping of the signal. In addition, the power scaling factor β is used to sensingRS Power scaling is performed so that the transmit power of the sensing reference signal meets the constraint conditions.

[0048] With reference to some embodiments of the first aspect, in some embodiments, the precoding vector satisfies one of the following conditions:

[0049] Among them, w cdd (k) is the precoding vector acting on the OFDM subcarrier numbered k, e is a natural constant, j is an imaginary unit, is the sensing reference signal port m i The cyclic shift ratio, is the sensing reference signal port m i The cyclic shift value of is the number of ports of the sensing reference signal, the N FFT is the number of fast Fourier transform (FFT) points.

[0050] In the above embodiment, the precoding vector w used for cyclic shift cdd (k) includes cyclic shift information of each perception reference signal port. In some optional implementations, the cyclic shift information of each perception reference signal port may include a cyclic shift ratio of the perception reference signal port, where the cyclic shift ratio indicates a ratio between an offset value of the perception reference signal port in the delay domain and an OFDM symbol length. In some optional implementations, the cyclic shift information of each perception reference signal port may include a cyclic shift value of the perception reference signal port, where the cyclic shift value indicates an offset value of the perception reference signal port in the delay domain.

[0051] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0052] Parameter information is sent to a receiver, where the parameter information is used by the receiver to determine the cyclic shift information of the multiple perception reference signal ports.

[0053] In the above embodiment, the transmitter notifies the receiver of the parameter information, so that the receiver can determine the cyclic shift information of each port of the perception reference signal according to the parameter information, and measure the perception amount of each port of the perception reference signal accordingly.

[0054] With reference to some embodiments of the first aspect, in some embodiments, the parameter information includes at least one of the following:

[0055] a cyclic shift ratio of one of the plurality of sensing reference signal ports;

[0056] A cyclic shift value of one of the plurality of perceptual reference signal ports.

[0057] In the above embodiment, the transmitter may inform the receiver of the cyclic shift ratio or cyclic shift value of at least one perception reference signal port.

[0058] In a second aspect, an embodiment of the present disclosure provides a sensing method, which is performed by a receiver. The method includes:

[0059] receiving a sensing reference signal;

[0060] The perception reference signal is a transmitter that performs cyclic shift precoding on multiple perception reference signal ports based on a modulation symbol and a precoding vector for cyclic shift, and sends the signal according to the transmitted signal vector after cyclic shift precoding. The precoding vector contains cyclic shift information of the multiple perception reference signal ports, and the modulation symbol is a symbol of the first sequence mapped to the resource element after constellation modulation.

[0061] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0062] Receive parameter information;

[0063] Determine cyclic shift information of the multiple perception reference signal ports according to the parameter information;

[0064] The perception amount of each of the perception reference signal ports is measured according to the perception reference signal and the cyclic shift information of each of the perception reference signal ports.

[0065] In conjunction with some embodiments of the second aspect, in some embodiments, the parameter information includes at least one of the following:

[0066] a cyclic shift ratio of one of the plurality of sensing reference signal ports;

[0067] A cyclic shift value of one of the plurality of perceptual reference signal ports.

[0068] In a third aspect, an embodiment of the present disclosure provides a transmitter, including:

[0069] a processing module configured to determine a precoding vector for cyclic shift, the precoding vector including cyclic shift information of multiple perception reference signal ports, and configured to perform cyclic shift precoding of the multiple perception reference signal ports according to the precoding vector and a modulation symbol, the modulation symbol being a symbol of a first sequence mapped to a resource element after constellation modulation;

[0070] The transceiver module is configured to send a perception reference signal according to a transmit signal vector after cyclic shift precoding.

[0071] In a fourth aspect, an embodiment of the present disclosure provides a receiver, including:

[0072] a transceiver module configured to receive a sensing reference signal;

[0073] The perception reference signal is a transmitter that performs cyclic shift precoding on multiple perception reference signal ports based on a modulation symbol and a precoding vector for cyclic shift, and sends the signal according to the transmitted signal vector after cyclic shift precoding. The precoding vector contains cyclic shift information of the multiple perception reference signal ports, and the modulation symbol is a symbol of the first sequence mapped to the resource element after constellation modulation.

[0074] In a fifth aspect, an embodiment of the present disclosure proposes a perception device, comprising: one or more processors; wherein the perception device is used to execute the method described in the first aspect of the embodiment of the present disclosure or the optional implementation of the first aspect.

[0075] In a sixth aspect, an embodiment of the present disclosure proposes a perception device, comprising: one or more processors; wherein the perception device is used to execute the method described in the second aspect of the embodiment of the present disclosure or the optional implementation of the second aspect.

[0076] In the seventh aspect, an embodiment of the present disclosure proposes a perception system, comprising: a transmitter for executing the method described in the first aspect of the embodiment of the present disclosure or the optional implementation of the first aspect; a receiver for executing the method described in the second aspect of the embodiment of the present disclosure or the optional implementation of the second aspect.

[0077] In an eighth aspect, an embodiment of the present disclosure proposes a storage medium storing instructions, which, when the instructions are executed on a communication device, enables the communication device to execute the method described in the first aspect or the optional implementation of the first aspect of the embodiment of the present disclosure, or the method described in the second aspect or the optional implementation of the second aspect.

[0078] In the ninth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the method described in the first aspect or the optional implementation of the first aspect of the embodiment of the present disclosure, or the method described in the second aspect or the optional implementation of the second aspect.

[0079] In the tenth aspect, an embodiment of the present disclosure proposes a computer program, which, when running on a computer, enables the computer to execute the method described in the first aspect or the optional implementation of the first aspect of the embodiment of the present disclosure, or the method described in the second aspect or the optional implementation of the second aspect.

[0080] In an eleventh aspect, an embodiment of the present disclosure provides a chip or a chip system. The chip or chip system includes a processing circuit configured to execute the method described in the first aspect or an optional implementation of the first aspect, or the method described in the second aspect or an optional implementation of the second aspect, of the embodiment of the present disclosure.

[0081] It is understandable that the above-mentioned transmitter, receiver, sensing device, sensing system, storage medium, program product, computer program, chip or chip system are all used to perform the method proposed in the embodiment of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding method and will not be repeated here.

[0082] The embodiments of the present disclosure provide a sensing method, apparatus, and system. In some embodiments, the transmitter may include a sensing transmitter, and the receiver may include a sensing receiver.

[0083] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0084] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0085] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0086] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0087] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0088] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0089] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0090] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0091] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0092] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0093] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0094] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not less than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0095] In some embodiments, devices and equipment can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they can also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject", etc.

[0096] In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

[0097] In some embodiments, "access network device (AN device)" may also be referred to as "radio access network device (RAN device)", "base station (BS)", "radio base station", "fixed station", and in some embodiments may also be understood as "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission and / or reception point (TRP)" "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)", etc.

[0098] In some embodiments, "terminal" or "terminal device" may be referred to as "user equipment (UE)", "user terminal" "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc.

[0099] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0100] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0101] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0102] Wireless communication and wireless sensing share a high degree of similarity. Integrated Sensing and Communication (ISAC) can unite wireless communication and wireless sensing, fostering close collaboration between the two. This approach benefits both wireless communication and wireless sensing, improving both the effectiveness and reliability of wireless communication and the accuracy of wireless sensing. Furthermore, devices that support both wireless communication and wireless sensing can reduce network deployment costs.

[0103] In wireless sensing, it is often necessary to estimate the distance, azimuth angle (such as horizontal and vertical angles), and speed of the sensing target. In a broad sense, sensing also includes wireless tracking and radio frequency identification of the sensing target. To achieve high-precision sensing, the transmitter typically sends a dedicated reference signal for sensing, which, for ease of description, will be referred to as a sensing reference signal below. Optionally, the sensing reference signal may not carry information or data used for communication. In some embodiments, the sensing reference signal may be replaced by the sensing signal.

[0104] It is understandable that wireless perception may include multiple perception scenarios, such as perception between terminals, perception between terminals and network devices, perception between network devices and network devices, etc.

[0105] In some embodiments, in a monostatic mode, the transmitter may transmit a sensing reference signal and estimate at least one of a distance, an angle, a speed, etc. of a sensing target by measuring an echo of the sensing reference signal.

[0106] In some embodiments, in a bistatic mode, a transmitter may transmit a sensing reference signal, and a receiver may receive and measure the sensing reference signal to estimate at least one of a distance, an angle, a speed, etc. of a sensing target.

[0107] In single-station mode, the transmitter and receiver can be located on the same device, such as the same terminal or the same network device. In dual-station mode, the transmitter and receiver can be located on different devices, such as the transmitter at the terminal and the receiver at another terminal, the transmitter at the terminal and the receiver at the network device, the transmitter at the network device and the receiver at another network device, or the transmitter at the network device and the receiver at the terminal.

[0108] For example, estimating the distance to a perceived target requires the receiver to accurately estimate the arrival time of the first echo path reflected by the perceived target (in single-station mode) or the first path scattered by the perceived target (in dual-station mode). To ensure accurate distance sensing, interference with the receiver's sensing reference signal should be minimized.

[0109] In high-frequency bands such as millimeter wave (mmWave), sub-terahertz (subThz), and terahertz (THz), propagation losses are extremely severe. In such cases, beamforming is essential for sensing. Otherwise, severe high-frequency transmission losses will significantly reduce sensing accuracy and performance.

[0110] When beamforming is used, high-precision perception is limited to the perception of targets within the beam coverage area or in the area near the beam. For targets outside the beam coverage area or far away from the beam area, the perception accuracy is low and the perception performance cannot be guaranteed. Therefore, the transmitter needs to perform beam sweeping to complete the perception of surrounding targets. To quickly complete the perception of surrounding targets, the transmitter can simultaneously transmit multiple beams pointing in different directions to perform beam scanning in parallel. In other words, the transmitter needs to send perception reference signals from multiple ports. For ease of description, each port of the perception reference signal is referred to as a perception reference signal port below.

[0111] As an implementation method, time division multiplexing (TDM) can be used to multiplex multiple sensing reference signal ports. This means that the transmitter sends sensing reference signals for different ports using different beams on different time domain resource units (e.g., OFDM symbols, time slots, etc.). Because different sensing reference signal ports occupy different time domain resource units in TDM, the sensing reference signal overhead is high. Furthermore, because the sensing reference signals for different ports are sent sequentially at different times, the entire sensing process is actually serial, not parallel, resulting in a longer time to complete sensing of surrounding objects.

[0112] As an implementation method, frequency division multiplexing (FDM) can be used to multiplex multiple CRS ports. This means that the transmitter simultaneously transmits CRSs for multiple different ports using different beams on different frequency domain resource units (e.g., OFDM subcarriers, physical resource blocks (PRBs), subbands, and component carriers). Because different CRS ports occupy different frequency resources in FDM, this also results in high CRS overhead.

[0113] As an implementation method, code division multiplexing (CDM) can be used to multiplex multiple sensing reference signal ports. This means that the transmitter simultaneously transmits sensing reference signals for different ports using different beams over the same time-frequency resources. A bottleneck of CDM is the interference between sensing reference signals from different ports. If the interference between sensing reference signals from different ports is high, it will inevitably reduce sensing accuracy.

[0114] To reduce interference between different ports, orthogonal CDM codewords can be used to multiplex different sensing reference signal ports, such as orthogonal cover codes (OCC). Optionally, OCC can be used in the time domain (TD) or frequency domain (FD), namely TD-OCC or FD-OCC.

[0115] However, the cost of using OCC to multiplex different ports of the perception reference signal is that more time-frequency resources are occupied. Moreover, the occupied time-frequency resources are proportional to the number of multiplexed perception reference signal ports.

[0116] Figure 1 is a schematic diagram of a perception system according to an embodiment of the present disclosure. As shown in Figure 1 , perception system 100 may include a transmitter 101 and a receiver 102. In some embodiments, transmitter 101 comprises a perception transmitter. In some embodiments, receiver 102 comprises a perception receiver.

[0117] It should be noted that the number of transmitters 101 and the number of receivers 102 shown in Figure 1 are only examples and do not constitute a limitation on the embodiments of the present disclosure. In actual situations, there can be one or more transmitters 101 and one or more receivers 102.

[0118] In some embodiments, the transmitter 101 may be located in a terminal or a network device.

[0119] In some embodiments, the receiver 102 may be located in a terminal or a network device.

[0120] In some embodiments, the transmitter 101 and the receiver 102 may be located in the same device, for example, the transmitter 101 and the receiver 102 may be located in the same terminal or the same network device.

[0121] In some embodiments, the transmitter 101 and the receiver 102 may be located in different devices respectively, for example, the transmitter 101 is located in the terminal and the receiver 102 is located in another terminal; for example, the transmitter 101 is located in the terminal and the receiver 102 is located in the network device; for example, the transmitter 101 is located in the network device and the receiver 102 is located in another network device; for example, the transmitter 101 is located in the network device and the receiver 102 is located in the terminal.

[0122] In some embodiments, the terminal may include at least one of a mobile phone, a wearable device, an Internet of Things device, a car with sensing capabilities, a smart car, a tablet computer, a computer with wireless transceiver capabilities, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and a wireless terminal device in a smart home, but is not limited thereto.

[0123] In some embodiments, the network device is, for example, an access network device, which may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a Wi-Fi system, but is not limited thereto.

[0124] FIG2 is an interactive diagram of a perception method according to an embodiment of the present disclosure. As shown in FIG2 , the present disclosure embodiment relates to a perception method, which includes:

[0125] Step S2101: The transmitter determines a precoding vector for cyclic shift.

[0126] In some embodiments, the precoding vector for cyclic shift includes cyclic shift information of multiple perceptual reference signal ports, and cyclic shift precoding can be performed on the multiple perceptual reference signal ports according to the precoding vector.

[0127] In some embodiments, the embodiments of the present disclosure do not limit the name of the precoding vector used for cyclic shift, which may be, for example, "first precoding vector", "first vector", "cyclic delay diversity (CDD) precoding vector", "frequency selective precoding vector", etc.

[0128] In some embodiments, the cyclic shift information for each perception reference signal port includes a cyclic shift value for the corresponding port. The cyclic shift value indicates an offset value of the perception reference signal port in the delay domain. Optionally, the cyclic shift value of a perception reference signal port indicates an offset value of the port in the delay domain relative to timing zero.

[0129] In some embodiments, the cyclic shift information for each perception reference signal port includes a cyclic shift ratio for the corresponding port. The cyclic shift ratio indicates the ratio between the offset value of the perception reference signal port in the delay domain and the OFDM symbol length. Alternatively, the cyclic shift ratio for a perception reference signal port indicates the ratio between the offset value of the port in the delay domain relative to timing zero and the OFDM symbol length.

[0130] In some embodiments, the precoding vector for cyclic shift satisfies one of the following:

[0131] in, is the precoding vector for cyclic shift acting on the OFDM subcarrier numbered k, e is a natural constant, j is an imaginary unit, is the sensing reference signal port m i The cyclic shift ratio, is the sensing reference signal port m i The cyclic shift value of . is the port number set of the sensing reference signal, is the number of ports sensing the reference signal, for example, Encoding a set of ports The number of elements in N. FFT is the number of FFT points, optionally, N FFT is the number of FFT points used for the perceptual reference signal.

[0132] In the above example precoding vector, the perceptual reference signal port m is used. iFor example, Represents the sensing reference signal port m i cyclic shift information.

[0133] In the above example precoding vector, the perceptual reference signal port m is used. i For example, Represents the sensing reference signal port m i cyclic shift information.

[0134] In some embodiments, You can take values ​​from the first set. For example,

[0135] In some embodiments, the cyclic shift ratios of different CRS ports may be different. Optionally, when the number of CRS ports is less than or equal to the number of elements in the first set, the cyclic shift ratios of each CRS port are different.

[0136] In some embodiments, the cyclic shift ratios of different perception reference signal ports may be the same. Optionally, when the number of perception reference signal ports is greater than the number of elements in the first set, the cyclic shift ratios of some perception reference signal ports are the same. For example, when the isolation of two perception reference signal ports in the spatial domain (that is, the angle domain) is relatively good (mutual interference is negligible), multiplexing of the cyclic shift ratio can be considered. This is because once the two perception reference signal ports use exactly the same cyclic shift ratio, this means that the two ports are completely overlapped in the delay domain and can only be distinguished by the spatial domain (for example, corresponding to different columns of the spatial domain precoding matrix below). If the spatial domain isolation is not good, the mutual interference between the two ports will be large, resulting in a significant decrease in perception performance.

[0137] In some embodiments, You can take values ​​from the second set. For example,

[0138] In some embodiments, the cyclic shift values ​​of different CRS ports may be different. Optionally, when the number of CRS ports is less than or equal to the number of elements in the second set, the cyclic shift value of each CRS port is different.

[0139] In some embodiments, the cyclic shift values ​​of different perception reference signal ports may be the same. Optionally, when the number of perception reference signal ports is greater than the number of elements in the first set, the cyclic shift values ​​of some perception reference signal ports may be the same. For example, when the isolation between two perception reference signal ports in the spatial domain (i.e., the angular domain) is relatively good (mutual interference is negligible), multiplexing of cyclic shift values ​​may be considered.

[0140] In the above embodiment, since the cyclic shift ratios or cyclic shift values ​​of different perception reference signal ports are different, or the cyclic shift ratios or cyclic shift values ​​of some perception reference signal ports are the same, after cyclic shift precoding is performed on multiple perception reference signal ports, multiple ports of the perception reference signal can be multiplexed, and interference between perception reference signals of different ports can be avoided.

[0141] In some embodiments, the present disclosure does not limit the name of the first set, which may be, for example, a "cyclic shift set," a "cyclic shift ratio value set," etc. In some embodiments, the present disclosure does not limit the name of the second set, which may be, for example, a "cyclic shift set," a "cyclic shift value set," etc.

[0142] In step S2102 , the transmitter performs cyclic shift precoding on multiple perception reference signal ports.

[0143] In some embodiments, the transmitter performs cyclic shift precoding on multiple perception reference signal ports based on a precoding vector used for cyclic shifting and a modulation symbol. Optionally, the modulation symbol is a symbol mapped onto a resource element after constellation modulation (e.g., constellation modulation such as Quadrature Phase Shift Keying (QPSK)) of a first sequence. Optionally, the first sequence may be a root sequence of the perception reference signal.

[0144] In some embodiments, taking a resource element (k, l) where the perception reference signal is located as an example, the resource element (k, l) is located in the OFDM symbol numbered l on the time-frequency resource grid and the OFDM subcarrier numbered k, according to the precoding vector w for cyclic shift acting on the OFDM subcarrier numbered k cdd (k), and the first sequence (such as the root sequence of the perception reference signal) is constellation modulated and mapped to the modulation symbol r(k, l) on the resource element (k, l), and cyclic shift precoding of multiple perception reference signal ports is performed. cdd (k) contains cyclic shift information of multiple perception reference signal ports.

[0145] In some embodiments, cyclic shift precoding includes multiplying a precoding vector for cyclic shift with a modulation symbol to be sent on a resource element. Taking a resource element (k, l) where the perception reference signal is located as an example, cyclic shift precoding includes multiplying a precoding vector w for cyclic shift applied to an OFDM subcarrier numbered k by cdd (k), multiplied by the modulation symbol r(k, l) to be sent on the resource element (k, l).

[0146] In step S2103, the transmitter determines a transmission signal vector of the sensing reference signal on the resource element.

[0147] In some embodiments, the transmitter determines a transmission signal vector of the sensing reference signal on the resource element according to the symbols of the plurality of sensing reference signal ports after cyclic shift precoding.

[0148] In some embodiments, the transmit signal vector is N Tx dimensional complex transmit signal vector.

[0149] In some embodiments, the embodiments of the present disclosure do not limit the name of the transmit signal vector, which may be, for example, a "perception reference signal vector", a "second vector", etc.

[0150] In some embodiments, taking a resource element (k, l) where the sensing reference signal is located as an example, the transmitted signal vector of the sensing reference signal on the resource element (k, l) satisfies: x(k, l) = β sensingRS ·W·w cdd (k)·r(k, l);

[0151] in:

[0152] (k, l) represents a resource element where the perception reference signal is located, located in the OFDM symbol numbered l and the OFDM subcarrier numbered k on the time-frequency resource grid;

[0153] is the transmitted signal vector of the perception reference signal on the resource element (k, l), where x(k, l) is N Tx dimensional complex transmitted signal vector, x(k, l) contains N Tx elements, corresponding to the N used by the transmitter to send the perception reference signal Tx transmit antennas (or antenna ports);

[0154] β sensingRS is a power scaling factor used to ensure that the transmit power of the perception reference signal meets the constraints, such as the total transmit power constraint and the transmit power constraint of each antenna port;

[0155] is the spatial precoding matrix, is the sensing reference signal port m i The precoding vector, is the port number set of the sensing reference signal, In order to sense the number of ports of the reference signal, in some embodiments, the embodiments of the present disclosure do not limit the names of the precoding vectors included in the spatial precoding matrix, and the names thereof may be, for example, "second precoding vector", "spatial precoding vector", "third vector", etc.

[0156] is a precoding vector for cyclic shift acting on the OFDM subcarrier numbered k (including the perception reference signal resource element on the OFDM subcarrier numbered k);

[0157] r(k, l) is a modulation symbol of the first sequence mapped to the resource element (k, l) after constellation modulation (such as QPSK constellation modulation). In some embodiments, the first sequence can be a root sequence of a perception reference signal.

[0158] It can be understood that the above formula is only used as an example to illustrate the transmission signal vector and does not constitute a limitation on the transmission signal vector. For example, in some embodiments, some parameters in the above formula (such as the power scaling factor β sensingRS ) can be omitted. For example, in some embodiments, other parameters can be introduced into the above formula.

[0159] Step S2104: The transmitter sends a perception reference signal.

[0160] In some embodiments, the transmitter sends a perception reference signal according to the transmit signal vector. Optionally, the perception reference signal is a multi-port perception reference signal.

[0161] In some embodiments, taking a resource element (k, l) where the sensing reference signal is located as an example, the transmitted signal vector x(k, l) of the sensing reference signal on the resource element (k, l) is N Tx dimensional complex transmitted signal vector, it can be understood that x(k, l) contains N Tx elements, corresponding to the N used by the transmitter to send the perception reference signal Tx transmit antennas (or antenna ports), through N Tx The transmitting antennas (or antenna ports) transmit multi-port sensing reference signals on the resource element (k, l).

[0162] In some embodiments, a receiver receives a perception reference signal.

[0163] Step S2105: The transmitter sends parameter information.

[0164] In some embodiments, the parameter information is used by the receiver to determine cyclic shift information of multiple perception reference signal ports.

[0165] In some embodiments, the parameter information includes at least one of the following:

[0166] Port number set for sensing reference signals:

[0167] Number of ports sensing reference signals:

[0168] Cyclic shift ratio of at least one sensing reference signal port:

[0169] Cyclic shift value of at least one sensing reference signal port:

[0170] In some embodiments, the parameter information is carried in at least one of the following:

[0171] Downlink Control Information (DCI);

[0172] Media Access Control (MAC) Control Element (CE) messages;

[0173] Radio Resource Control (RRC) message.

[0174] In some embodiments, the embodiments of the present disclosure do not limit the execution order of step S2105. For example, it can be executed simultaneously with step S2101 or the order can be exchanged, or it can be executed simultaneously with step S2102 or the order can be exchanged, or it can be executed simultaneously with step S2103 or the order can be exchanged, or it can be executed simultaneously with step S2104 or the order can be exchanged.

[0175] In some embodiments, step S2105 is optional, that is, the transmitter may not send parameter information.

[0176] In some embodiments, the parameter information may be sent by a network device.

[0177] In some embodiments, the receiver receives parameter information.

[0178] In some embodiments, the receiver receives parameter information sent by the transmitter.

[0179] In some embodiments, the receiver receives parameter information sent by the network device.

[0180] In some embodiments, the parameter information may be agreed upon by a protocol.

[0181] In some embodiments, parameter information may be obtained from higher layers.

[0182] Step S2106: The receiver determines cyclic shift information of multiple perception reference signal ports.

[0183] In some embodiments, the receiver determines cyclic shift information of multiple perception reference signal ports based on parameter information.

[0184] The optional implementation of step S2106 can refer to the optional implementation of step S2101 and other related parts in the embodiment involved in Figure 2, and will not be repeated here.

[0185] In step S2107 , the receiver measures the perception value of each perception reference signal port.

[0186] In some embodiments, the receiver receives a perception reference signal, and measures a perception metric of each perception reference signal port according to the perception reference signal and cyclic shift information of each perception reference signal port.

[0187] In some embodiments, taking a resource element (k, l) where a perception reference signal is located as an example, a receiver receives the perception reference signal on resource element (k, l), multiplies the received signal on resource element (k, l) by the conjugate of r(k, l), and then performs parameter estimation on the perception quantity corresponding to each perception reference signal port based on the cyclic shift information of the port. The cyclic shift information of each perception reference signal port can be obtained from the parameter information.

[0188] It is worth noting that the method provided in the embodiment of the present disclosure is not limited to the frequency domain pattern of the perceptual reference signal, and it can be applied to any frequency domain pattern. That is, the method provided in the embodiment of the present disclosure is applicable not only to uniform frequency domain patterns, but also to non-uniform frequency domain patterns.

[0189] According to an embodiment of the present disclosure, different ports of the perception reference signal can occupy the same time-frequency resources. Different ports of the perception reference signal are cyclically shifted according to the precoding vector used for cyclic shift and the modulation symbol mapped to the resource element, thereby multiplexing multiple ports of the perception reference signal. Therefore, the perception reference signals of different ports can be sent simultaneously using different beams on the same time-frequency resources. On the one hand, it supports simultaneous scanning of multiple beams, and on the other hand, it can maintain a low time-frequency resource overhead.

[0190] In some embodiments, the names of information, etc. are not limited to the names recorded in the embodiments, and terms such as "information", "message", "signaling", "report", "configuration", "indication", "instruction", and "notification" can be used interchangeably.

[0191] The sensing method involved in the embodiments of the present disclosure may include at least one of steps S2101 to S2107. For example, step S2102 may be implemented as an independent embodiment, step S2102 + step S2103 + step S2104 may be implemented as an independent embodiment, step S2105 may be implemented as an independent embodiment, and step S2106 + step S2107 may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0192] In some embodiments, steps S2105 to S2107 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0193] In the embodiments of the present disclosure, some or all of the steps and their optional implementations may be arbitrarily combined with some or all of the steps in other embodiments, or may be arbitrarily combined with the optional implementations of other embodiments.

[0194] FIG3A is a flow chart of a sensing method according to an embodiment of the present disclosure. As shown in FIG3A , the embodiment of the present disclosure relates to a sensing method that can be applied to a transmitter. The method includes:

[0195] Step S3101: determine a precoding vector for cyclic shift.

[0196] In some embodiments, the precoding vector for cyclic shift includes cyclic shift information of multiple perceptual reference signal ports, and cyclic shift precoding can be performed on the multiple perceptual reference signal ports according to the precoding vector.

[0197] In some embodiments, the cyclic shift information of each perception reference signal port includes a cyclic shift value of the corresponding port.

[0198] In some embodiments, the cyclic shift information of each sensing reference signal port includes a cyclic shift ratio of the corresponding port.

[0199] In some embodiments, the precoding vector for cyclic shift satisfies one of the following:

[0200] The meaning of each parameter in the above formula can be found in the above description.

[0201] The optional implementation of step S3101 can refer to the optional implementation of step S2101 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0202] Step S3102: Perform cyclic shift precoding on multiple perception reference signal ports.

[0203] In some embodiments, cyclic shift precoding is performed on multiple perception reference signal ports based on a precoding vector used for cyclic shifting and a modulation symbol. Optionally, the modulation symbol is a symbol of a first sequence mapped to a resource element after constellation modulation (e.g., constellation modulation such as QPSK). Optionally, the first sequence may be a root sequence of the perception reference signal.

[0204] The optional implementation of step S3102 can refer to the optional implementation of step S2102 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0205] Step S3103: Determine a transmission signal vector of the sensing reference signal on the resource element.

[0206] In some embodiments, a transmission signal vector of the sensing reference signal on the resource element is determined according to the symbols of the plurality of sensing reference signal ports after cyclic shift precoding.

[0207] In some embodiments, the transmit signal vector is N Tx dimensional complex transmit signal vector.

[0208] In some embodiments, taking a resource element (k, l) where the sensing reference signal is located as an example, the transmitted signal vector of the sensing reference signal on the resource element (k, l) satisfies: x(k, l) = β sensingRS ·W·w cdd (k)·r(k, l);

[0209] The meaning of each parameter in the above formula can be found in the above description.

[0210] The optional implementation of step S3103 can refer to the optional implementation of step S2103 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0211] Step S3104: Send a perception reference signal.

[0212] In some embodiments, the sensing reference signal is sent according to the transmit signal vector. Optionally, the sensing reference signal is a multi-port sensing reference signal.

[0213] In some embodiments, taking a resource element (k, l) where the sensing reference signal is located as an example, the transmitted signal vector x(k, l) of the sensing reference signal on the resource element (k, l) is N Tx dimensional complex transmitted signal vector, it can be understood that x(k, l) contains N Tx elements, corresponding to the N used by the transmitter to send the perception reference signal Txtransmit antennas (or antenna ports), through N Tx The transmitting antennas (or antenna ports) transmit multi-port sensing reference signals on the resource element (k, l).

[0214] According to the above embodiment, different ports of the perception reference signal can occupy the same time-frequency resources. According to the precoding vector used for cyclic shift and the modulation symbol mapped to the resource element, the different ports of the perception reference signal are cyclically shifted, thereby multiplexing multiple ports of the perception reference signal. Therefore, the perception reference signals of different ports can be sent simultaneously using different beams on the same time-frequency resources. On the one hand, it supports simultaneous scanning of multiple beams, and on the other hand, it can maintain low time-frequency resource overhead.

[0215] FIG3B is a flow chart of a sensing method according to an embodiment of the present disclosure. As shown in FIG3B , the embodiment of the present disclosure relates to a sensing method that can be applied to a transmitter. The method includes:

[0216] Step S3201: Determine a precoding vector for cyclic shift.

[0217] In some embodiments, the precoding vector for cyclic shift includes cyclic shift information of multiple perceptual reference signal ports, and cyclic shift precoding can be performed on the multiple perceptual reference signal ports according to the precoding vector.

[0218] In some embodiments, the cyclic shift information of each perception reference signal port includes a cyclic shift value of the corresponding port.

[0219] In some embodiments, the cyclic shift information of each sensing reference signal port includes a cyclic shift ratio of the corresponding port.

[0220] In some embodiments, the precoding vector for cyclic shift satisfies one of the following:

[0221] The meaning of each parameter in the above formula can be found in the above description.

[0222] The optional implementation of step S3201 can refer to the optional implementation of step S2101 in Figure 2, the optional implementation of step S3101 in Figure 3A, and other related parts in the embodiments involved in Figures 2 and 3A, which will not be repeated here.

[0223] Step S3202: Perform cyclic shift precoding on multiple perception reference signal ports.

[0224] In some embodiments, cyclic shift precoding is performed on multiple perception reference signal ports based on a precoding vector used for cyclic shifting and a modulation symbol. Optionally, the modulation symbol is a symbol of a first sequence mapped to a resource element after constellation modulation (e.g., constellation modulation such as QPSK). Optionally, the first sequence may be a root sequence of the perception reference signal.

[0225] The optional implementation of step S3202 can refer to the optional implementation of step S2102 in Figure 2, the optional implementation of step S3102 in Figure 3A, and other related parts in the embodiments involved in Figures 2 and 3A, which will not be repeated here.

[0226] Step S3203: Send a perception reference signal according to the transmit signal vector after cyclic shift precoding.

[0227] In some embodiments, the transmit signal vector is N Tx dimensional complex transmit signal vector.

[0228] In some embodiments, taking a resource element (k, l) where the sensing reference signal is located as an example, the transmitted signal vector of the sensing reference signal on the resource element (k, l) satisfies: x(k, l) = β sensingRS ·W·w cdd (k)·r(k, l);

[0229] The meaning of each parameter in the above formula can be found in the above description.

[0230] In some embodiments, the sensing reference signal is a multi-port sensing reference signal.

[0231] The optional implementation of step S3203 can be found in the optional implementation of step S2103 in Figure 2, the optional implementation of step S3103 in Figure 3A, the optional implementation of step S3104, and other related parts in the embodiments involved in Figures 2 and 3A, which will not be repeated here.

[0232] In some embodiments, by performing cyclic shift precoding on multiple perception reference signal ports, multiple ports of the perception reference signal can be multiplexed, so that a multi-port perception reference signal can be transmitted.

[0233] According to the above embodiment, different ports of the perception reference signal can occupy the same time-frequency resources. Based on the precoding vector used for cyclic shift and the modulation symbol mapped to the resource element, the different ports of the perception reference signal are cyclically shifted and precoded. Multiple ports of the perception reference signal can be multiplexed, so that multi-port perception reference signals can be sent. Therefore, perception reference signals of different ports can be sent simultaneously using different beams on the same time-frequency resources. On the one hand, it supports simultaneous scanning of multiple beams, and on the other hand, it can maintain low time-frequency resource overhead.

[0234] FIG3C is a flow chart of a sensing method according to an embodiment of the present disclosure. As shown in FIG3C , the embodiment of the present disclosure relates to a sensing method that can be applied to a transmitter. The method includes:

[0235] Step S3301, sending parameter information.

[0236] In some embodiments, the parameter information is used by the receiver to determine cyclic shift information of multiple perception reference signal ports.

[0237] In some embodiments, the parameter information includes at least one of the following:

[0238] A set of port numbers for sensing reference signals;

[0239] A port for sensing a reference signal;

[0240] a cyclic shift ratio of at least one sensing reference signal port;

[0241] A cyclic shift value of at least one sensing reference signal port.

[0242] In some embodiments, the parameter information is carried in at least one of the following:

[0243] DCI;

[0244] MAC CE message;

[0245] RRC message.

[0246] In some embodiments, step S3301 is optional, that is, the transmitter may not send parameter information.

[0247] The optional implementation of step S3301 can refer to the optional implementation of step S2105 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0248] According to the above embodiment, the transmitter can notify the receiver of parameter information, for example, notifying the receiver of the cyclic shift ratio or cyclic shift value of each perception reference signal port, so that the receiver can determine the cyclic shift information of each perception reference signal port based on the parameter information, and measure the perception amount of each perception reference signal port accordingly.

[0249] It can be understood that the various embodiments can be arbitrarily combined. For example, some or all of the steps of different embodiments can be arbitrarily combined. For example, the embodiment of Figure 3C can be arbitrarily combined with some or all of the steps of the embodiment of Figure 2, the embodiment of Figure 3C can be arbitrarily combined with some or all of the steps of the embodiment of Figure 3A, and the embodiment of Figure 3C can be arbitrarily combined with some or all of the steps of the embodiment of Figure 3B.

[0250] FIG4A is a flow chart of a sensing method according to an embodiment of the present disclosure. As shown in FIG4A , the embodiment of the present disclosure relates to a sensing method that can be applied to a receiver. The method includes:

[0251] Step S4101, obtain parameter information.

[0252] In some embodiments, the parameter information includes at least one of the following:

[0253] A set of port numbers for sensing reference signals;

[0254] A port for sensing a reference signal;

[0255] a cyclic shift ratio of at least one sensing reference signal port;

[0256] A cyclic shift value of at least one sensing reference signal port.

[0257] In some embodiments, parameter information specified by a protocol is obtained.

[0258] In some embodiments, parameter information is obtained from a higher layer.

[0259] In some embodiments, parameter information is received.

[0260] In some embodiments, parameter information sent by a transmitter is received, but the invention is not limited thereto and parameter information sent by other entities may also be received.

[0261] In some embodiments, parameter information sent by a network device is received, but the invention is not limited thereto and parameter information sent by other entities may also be received.

[0262] In some embodiments, the parameter information is carried in at least one of the following:

[0263] DCI;

[0264] MAC CE message;

[0265] RRC message.

[0266] The optional implementation of step S4101 can refer to the optional implementation of step S2105 in Figure 2, the optional implementation of step S3301 in Figure 3C, and other related parts in the embodiments involved in Figures 2 and 3C, which will not be repeated here.

[0267] Step S4102: Receive a perception reference signal.

[0268] In some embodiments, a sensing reference signal sent by a transmitter is received. Optionally, the sensing reference signal is a multi-port sensing reference signal.

[0269] The optional implementation of step S4102 can be found in the optional implementation of step S2104 in Figure 2, the optional implementation of step S3104 in Figure 3A, the optional implementation of step S3203 in Figure 3B, and other related parts in the embodiments involved in Figures 2, 3A, and 3B, which will not be repeated here.

[0270] In some embodiments, the embodiments of the present disclosure do not limit the execution order of step S4102. For example, the order of step S4102 can be exchanged with step S4101 or the step S4102 can be executed simultaneously.

[0271] Step S4103: Determine cyclic shift information of multiple sensing reference signal ports.

[0272] In some embodiments, cyclic shift information of multiple perception reference signal ports is determined according to the parameter information.

[0273] In some embodiments, the embodiments of the present disclosure do not limit the execution order of step S4103. For example, the order of step S4103 can be exchanged with step S4102 or executed simultaneously.

[0274] The optional implementation of step S4103 can refer to step S2101 in FIG. 2 , the optional implementation of step S2106 , and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

[0275] Step S4104: measuring the perception value of each perception reference signal port.

[0276] In some embodiments, the sensing quantity of each sensing reference signal port is measured according to the sensing reference signal and the cyclic shift information of each sensing reference signal port.

[0277] The optional implementation of step S4104 can refer to the optional implementation of step S2107 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0278] According to the above embodiment, the receiver obtains parameter information and receives a perception reference signal, determines cyclic shift information of each port of the perception reference signal based on the parameter information, and measures the perception amount of each port of the perception reference signal accordingly.

[0279] FIG4B is a flow chart of a sensing method according to an embodiment of the present disclosure. As shown in FIG4B , the embodiment of the present disclosure relates to a sensing method that can be applied to a receiver. The method includes:

[0280] Step S4201: Receive a perception reference signal.

[0281] In some embodiments, a sensing reference signal sent by a transmitter is received. Optionally, the sensing reference signal is a multi-port sensing reference signal.

[0282] In some embodiments, the above-mentioned perception reference signal is a transmitter that performs cyclic shift precoding on multiple perception reference signal ports based on a precoding vector for cyclic shift and a modulation symbol, and is sent according to a transmit signal vector after cyclic shift precoding. The precoding vector for cyclic shift includes cyclic shift information for multiple perception reference signal ports. Optionally, the modulation symbol is a symbol mapped to a resource element after constellation modulation (e.g., constellation modulation such as QPSK) of a first sequence. Optionally, the first sequence can be a root sequence of the perception reference signal.

[0283] The optional implementation of step S4201 can be found in the optional implementation of step S2104 in Figure 2, the optional implementation of step S3104 in Figure 3A, the optional implementation of step S3203 in Figure 3B, and other related parts in the embodiments involved in Figures 2, 3A, and 3B, which will not be repeated here.

[0284] It can be understood that the various embodiments can be arbitrarily combined. For example, some or all of the steps of different embodiments can be arbitrarily combined. For example, the embodiment of Figure 4B can be arbitrarily combined with some or all of the steps of the embodiment of Figure 2, the embodiment of Figure 4B can be arbitrarily combined with some or all of the steps of the embodiment of Figure 3A, the embodiment of Figure 4B can be arbitrarily combined with some or all of the steps of the embodiment of Figure 3B, the embodiment of Figure 4B can be arbitrarily combined with some or all of the steps of the embodiment of Figure 3C, and the embodiment of Figure 4B can be arbitrarily combined with some or all of the steps of the embodiment of Figure 4A.

[0285] The present disclosure proposes a multi-port sensing reference signal based on cyclic delay diversity (CDD), wherein CDD is used to multiplex multiple ports of the sensing reference signal. For ease of description, the sensing reference signal on a resource element (RE) (k, l) can be expressed as: x(k, l) = β sensingRS ·W·w cdd (k)·r(k, l);

[0286] The meaning of each parameter in the above formula can be found in the above description.

[0287] As an optional implementation, the precoding vector w cdd (k) Satisfy:

[0288] in, is the sensing reference signal port m i The cyclic shift ratio (cyclic shift ratio),

[0289] In some embodiments,

[0290] As an optional implementation, the precoding vector w cdd (k) Satisfy:

[0291] in, is the sensing reference signal port m i The cyclic shift value (cyclic shift),

[0292] In some embodiments, Among them, N FFT is the number of FFT points (FFT size).

[0293] It is worth noting that the embodiments of the present disclosure are applicable to any frequency domain pattern. In other words, they are applicable not only to frequency domain uniform patterns but also to non-uniform patterns.

[0294] The perceptual transmitter notifies the perceptual receiver of at least one of the following parameters through signaling (for example, through at least one of signaling such as DCI, MAC CE, and RRC):

[0295] Port number set for sensing reference signals:

[0296] Number of ports sensing reference signals:

[0297] The cyclic shift ratio of each sensing reference signal port is:

[0298] The cyclic shift of each sensing reference signal port is:

[0299] According to the above embodiments, the CDD-based multi-port sensing reference signal proposed in the embodiments of the present disclosure supports simultaneous scanning of multiple beams and maintains low time-frequency resource overhead.

[0300] The present disclosure also provides an apparatus for implementing any of the above methods. For example, a device is provided that includes units or modules for implementing each step performed by a transmitter in any of the above methods. For another example, another device is provided that includes units or modules for implementing each step performed by a receiver in any of the above methods.

[0301] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0302] In the embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit. The logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable. For example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and implementing the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0303] Figure 5A is a schematic diagram of the structure of a transmitter proposed in an embodiment of the present disclosure. As shown in Figure 5A, the transmitter 5100 may include at least one of a transceiver module 5101 and a processing module 5102. In some embodiments, the processing module is configured to determine a precoding vector for cyclic shift. In some embodiments, the processing module is configured to perform cyclic shift precoding for multiple perception reference signal ports based on the modulation symbol and the precoding vector for cyclic shift. In some embodiments, the transceiver module is configured to transmit a perception reference signal based on the transmit signal vector after cyclic shift precoding. Optionally, the transceiver module is configured to perform at least one of the communication steps such as transmitting and / or receiving performed by the transmitter in any of the above methods (e.g., step S2104 and step S2105, but not limited thereto), which are not further described here. Optionally, the processing module is configured to perform at least one of the other steps performed by the transmitter in any of the above methods (e.g., step S2101, step S2102, step S2103, but not limited thereto), which are not further described here.

[0304] FIG5B is a schematic diagram of the structure of a receiver proposed in an embodiment of the present disclosure. As shown in FIG5B , the receiver 5200 may include: at least one of a transceiver module 5201 and a processing module 5202. In some embodiments, the transceiver module is configured to receive a perception reference signal. Optionally, the transceiver module is used to perform at least one of the communication steps such as sending and / or receiving performed by the receiver in any of the above methods, which will not be repeated here. Optionally, the processing module is used to perform at least one of the other steps (such as step S2106 and step S2107, but not limited thereto) performed by the receiver in any of the above methods, which will not be repeated here.

[0305] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, and the transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0306] In some embodiments, the processing module can be a single module or can include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module. Optionally, the processing module can be interchangeable with the processor.

[0307] Figure 6A is a schematic diagram of the structure of a communication device 6100 proposed in an embodiment of the present disclosure. Communication device 6100 can be a network device (e.g., an access network device), a terminal (e.g., a user equipment), a chip, a chip system, or a processor that supports a network device implementing any of the above methods, or a chip, a chip system, or a processor that supports a terminal implementing any of the above methods. Communication device 6100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0308] As shown in Figure 6A, the communication device 6100 includes one or more processors 6101. The processor 6101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control communication devices (such as base stations, baseband chips, terminal devices, terminal device chips, distributed units (DUs) or centralized units (CUs), etc.), execute programs, and process program data. The communication device 6100 is used to perform any of the above methods.

[0309] In some embodiments, the communication device 6100 further includes one or more memories 6102 for storing instructions. Optionally, all or part of the memories 6102 may be located outside the communication device 6100.

[0310] In some embodiments, the communication device 6100 further includes one or more transceivers 6103. When the communication device 6100 includes one or more transceivers 6103, the transceiver 6103 performs at least one of the communication steps such as sending and / or receiving in the above method (for example, step S2104 and step S2105, but not limited thereto), and the processor 6101 performs at least one of the other steps (for example, step S2101, step S2102, step S2103, step S2106, and step S2107, but not limited thereto).

[0311] In some embodiments, a transceiver may include a receiver and / or a transmitter. The receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0312] In some embodiments, the communication device 6100 may include one or more interface circuits. Optionally, the interface circuits are connected to the memory 6102 and may be used to receive signals from the memory 6102 or other devices, or to send signals to the memory 6102 or other devices. For example, the interface circuits may read instructions stored in the memory 6102 and send the instructions to the processor 6101.

[0313] The communication device 6100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 6100 described in the present disclosure is not limited thereto, and the structure of the communication device 6100 may not be limited to FIG6A. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0314] 6B is a schematic diagram of the structure of a chip 6200 according to an embodiment of the present disclosure. If the communication device 6100 can be a chip or a chip system, reference can be made to the schematic diagram of the structure of the chip 6200 shown in FIG6B , but the present disclosure is not limited thereto.

[0315] The chip 6200 includes one or more processors 6201 , and the chip 6200 is configured to execute any of the above methods.

[0316] In some embodiments, the chip 6200 further includes one or more interface circuits 6202. Optionally, the interface circuit 6202 is connected to the memory 6203. The interface circuit 6202 can be used to receive signals from the memory 6203 or other devices, and can be used to send signals to the memory 6203 or other devices. For example, the interface circuit 6202 can read instructions stored in the memory 6203 and send the instructions to the processor 6201.

[0317] In some embodiments, the interface circuit 6202 executes at least one of the communication steps such as sending and / or receiving in the above method (for example, step S2104, step S2105, but not limited to these), and the processor 6201 executes at least one of the other steps (for example, step S2101, step S2102, step S2103, step S2106, step S2107, but not limited to these).

[0318] In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

[0319] In some embodiments, the chip 6200 further includes one or more memories 6203 for storing instructions. Alternatively, all or part of the memories 6203 may be outside the chip 6200.

[0320] The present disclosure also proposes a storage medium having instructions stored thereon. When the instructions are executed on the communication device 6100, the communication device 6100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a transient storage medium.

[0321] The present disclosure also provides a program product, which, when executed by the communication device 6100, enables the communication device 6100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0322] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

Claims

1. A sensing method, characterized in that: Executed by a transmitter, the method includes: Determining a precoding vector for cyclic shift, wherein the precoding vector includes cyclic shift information of a plurality of perceptual reference signal ports; Performing cyclic shift precoding of the multiple perception reference signal ports according to the precoding vector and the modulation symbol, wherein the modulation symbol is a symbol of the first sequence mapped to the resource element after constellation modulation; The perception reference signal is sent according to the transmit signal vector after cyclic shift precoding.

2. The method according to claim 1, characterized in that The transmission signal vector satisfies: x(k,l)=β sensingRS ·W·w cdd (k)·r(k,l); Wherein, (k, l) represents the resource element located in the orthogonal frequency division multiplexing OFDM symbol numbered l and the OFDM subcarrier numbered k, x(k, l) is the transmitted signal vector of the perception reference signal on the resource element (k, l), β sensingRS is the power scaling factor, W is the spatial precoding matrix, and w cdd (k) is the precoding vector acting on the OFDM subcarrier numbered k, and r(k, l) is the modulation symbol mapped to the resource element (k, l).

3. The method according to claim 1 or 2, characterized in that: The precoding vector satisfies one of the following: Among them, w cdd (k) is the precoding vector acting on the OFDM subcarrier numbered k, e is a natural constant, j is an imaginary unit, is the sensing reference signal port m i The cyclic shift ratio of is the sensing reference signal port m i The cyclic shift value of is the number of ports of the sensing reference signal, and the N FFT is the number of fast Fourier transform FFT points.

4. The method according to any one of claims 1 to 3, characterized in that: The method further comprises: Parameter information is sent to a receiver, where the parameter information is used by the receiver to determine the cyclic shift information of the multiple perception reference signal ports.

5. The method according to claim 4, characterized in that The parameter information includes at least one of the following: a cyclic shift ratio of one of the plurality of sensing reference signal ports; A cyclic shift value of a perceptual reference signal port among the plurality of perceptual reference signal ports.

6. A sensing method, characterized in that: Executed by a receiver, the method includes: receiving a sensing reference signal; The perception reference signal is a transmitter that performs cyclic shift precoding of multiple perception reference signal ports according to a modulation symbol and a precoding vector for cyclic shift, and sends it according to a transmit signal vector after cyclic shift precoding. The precoding vector contains cyclic shift information of the multiple perception reference signal ports, and the modulation symbol is a symbol of a first sequence mapped to a resource element after constellation modulation.

7. The method according to claim 6, characterized in that The method further comprises: Receive parameter information; Determine cyclic shift information of the multiple perception reference signal ports according to the parameter information; According to the perception reference signal and the cyclic shift information of each of the perception reference signal ports, a perception quantity of each of the perception reference signal ports is measured.

8. The method according to claim 7, characterized in that The parameter information includes at least one of the following: a cyclic shift ratio of one of the plurality of sensing reference signal ports; A cyclic shift value of a perceptual reference signal port among the plurality of perceptual reference signal ports.

9. A transmitter, characterized in that: include: a processing module, configured to determine a precoding vector for cyclic shift, the precoding vector comprising cyclic shift information of a plurality of perceptual reference signal ports, and configured to perform cyclic shift precoding of the plurality of perceptual reference signal ports according to the precoding vector and a modulation symbol, the modulation symbol being a symbol of a first sequence mapped to a resource element after constellation modulation; The transceiver module is configured to send a perception reference signal according to a transmit signal vector after cyclic shift precoding.

10. A receiver, characterized in that: include: A transceiver module is configured to receive a sensing reference signal; The perception reference signal is a transmitter that performs cyclic shift precoding of multiple perception reference signal ports according to a modulation symbol and a precoding vector for cyclic shift, and sends it according to a transmit signal vector after cyclic shift precoding. The precoding vector contains cyclic shift information of the multiple perception reference signal ports, and the modulation symbol is a symbol of a first sequence mapped to a resource element after constellation modulation.

11. A sensing device, characterized in that: include: one or more processors; Wherein, the sensing device is used to execute the sensing method described in any one of claims 1-5.

12. A sensing device, characterized in that: include: one or more processors; Wherein, the sensing device is used to execute the sensing method described in any one of claims 6-8.

13. A perception system, characterized in that: include: A transmitter, configured to execute the sensing method according to any one of claims 1 to 5; A receiver, used to execute the perception method described in any one of claims 6-8.

14. A storage medium storing instructions, characterized in that: When the instruction is executed on the communication device, the communication device executes the perception method as described in any one of claims 1 to 5, or executes the perception method as described in any one of claims 6 to 8.

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