Sensing methods, sensing transmitter, sensing receiver, and system

Abstract

The present disclosure relates to sensing methods, a sensing transmitter, a sensing receiver, and a system. A sensing method comprises: a sensing transmitter determining a cyclic prefix length MCP on the basis of a sensing target range; and transmitting an OFDM symbol used for sensing, wherein the OFDM symbol used for sensing comprises a sensing reference signal and a cyclic prefix having a length of MCP. The embodiments of the present disclosure can flexibly adjust the length of a cyclic prefix in an OFDM symbol, so as to expand the ISI-free distance sensing range.

Description

Perception method, perception transmitter, perception receiver and system Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a perception method, a perception transmitter, a perception receiver, and a 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 propose a perception method, a perception transmitter, a perception receiver, and a system.

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

[0006] Determine the cyclic prefix length M based on the perceived target range CP ;

[0007] Send an Orthogonal Frequency Division Multiplexing (OFDM) symbol for sensing, wherein the OFDM symbol for sensing includes a sensing reference signal and a length of M CP cyclic prefix.

[0008] According to a second aspect of an embodiment of the present disclosure, a perception method is proposed, which is performed by a perception receiver. The method includes:

[0009] receiving first information sent by a sensing transmitter;

[0010] Determine the cyclic prefix length M according to the first information CP ;

[0011] According to the M CP A sensing reference signal is obtained from the received OFDM symbols used for sensing.

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

[0013] A processing module configured to determine a cyclic prefix length M based on the perceived target range CP ;

[0014] The transceiver module is configured to send an OFDM symbol for sensing, wherein the OFDM symbol for sensing includes a sensing reference signal and a length of M. CP cyclic prefix.

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

[0016] a transceiver module, configured to receive first information sent by the sensing transmitter;

[0017] A processing module configured to determine a cyclic prefix length M according to the first information CP ;

[0018] The processing module is further configured to CP A sensing reference signal is obtained from the received OFDM symbols used for sensing.

[0019] According to a fifth aspect of an embodiment of the present disclosure, a perception device is proposed, comprising: one or more processors; wherein the perception device is used to execute the perception method proposed in the first aspect of an embodiment of the present disclosure.

[0020] According to a sixth aspect of an embodiment of the present disclosure, a perception device is proposed, comprising: one or more processors; wherein the perception device is used to execute the perception method proposed in the second aspect of an embodiment of the present disclosure.

[0021] According to the seventh aspect of the embodiments of the present disclosure, a perception system is proposed, including: a perception transmitter, used to execute the perception method proposed in the first aspect of the embodiments of the present disclosure; and a perception receiver, used to execute the perception method proposed in the second aspect of the embodiments of the present disclosure.

[0022] 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.

[0023] The embodiments of the present disclosure can extend the ISI-free distance perception range of wireless sensing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] FIG1 is an exemplary schematic diagram of the architecture of a perception system provided according to an embodiment of the present disclosure.

[0026] FIG2 a is an exemplary diagram of a plurality of OFDM symbols continuous in the time domain provided according to a parameter set used by a communication system.

[0027] FIG2 b is an exemplary schematic diagram of a plurality of consecutive OFDM symbols in the time domain according to an embodiment of the present disclosure.

[0028] FIG2 c is an exemplary schematic diagram of a plurality of consecutive OFDM symbols in the time domain according to an embodiment of the present disclosure.

[0029] FIG3 is an exemplary interaction diagram of a perception method provided according to an embodiment of the present disclosure.

[0030] FIG4 a is an exemplary flowchart of a perception method provided according to an embodiment of the present disclosure.

[0031] FIG4 b is an exemplary flowchart of a perception method provided according to an embodiment of the present disclosure.

[0032] FIG5 is an exemplary flowchart of a perception method provided according to an embodiment of the present disclosure.

[0033] FIG6 a is an exemplary schematic diagram of the structure of a cognitive transmitter provided according to an embodiment of the present disclosure.

[0034] FIG6 b is an exemplary schematic diagram of the structure of a perceptual receiver provided according to an embodiment of the present disclosure.

[0035] FIG7 a is an exemplary schematic diagram of the structure of a communication device provided according to an embodiment of the present disclosure.

[0036] FIG7 b is an exemplary schematic diagram of the structure of a chip provided according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0037] The embodiments of the present disclosure propose a perception method, a perception transmitter, a perception receiver, and a system.

[0038] In a first aspect, an embodiment of the present disclosure provides a sensing method, which is performed by a sensing transmitter. The method includes:

[0039] Determine the cyclic prefix length M based on the perceived target range CP ;

[0040] Send an Orthogonal Frequency Division Multiplexing (OFDM) symbol for sensing, wherein the OFDM symbol for sensing includes a sensing reference signal and a length of M CP cyclic prefix.

[0041] In the above embodiment, the sensing transmitter can flexibly adjust the length of the cyclic prefix in the OFDM symbol according to the sensed target range, thereby extending the ISI-free distance sensing range.

[0042] In conjunction with some embodiments of the first aspect, in some embodiments, the cyclic prefix length M CP Positively correlated with the maximum perceived distance within the perceived target range.

[0043] In the above embodiment, the cyclic prefix length is positively correlated with the maximum perception distance within the perceived target range. When it is necessary to perceive a target at a close distance, a shorter cyclic prefix can be used. When it is necessary to perceive a target at a farther distance, a longer cyclic prefix can be used, making the length of the cyclic prefix more flexible.

[0044] In conjunction with some embodiments of the first aspect, in some embodiments, sending OFDM symbols for sensing includes:

[0045] L OFDM symbols for perception are sent, where the L OFDM symbols for perception are continuous in the time domain, and L is an integer greater than or equal to 1.

[0046] In the above embodiment, one or more OFDM symbols for sensing may be continuously transmitted in the time domain.

[0047] In combination with some embodiments of the first aspect, in some embodiments, the total length of the L OFDM symbols used for perception is equal to the length of the OFDM symbol used for communication.

[0048] In the above embodiment, one or more sensing OFDM symbols can be sent within the time of a single communication OFDM symbol. For example, when sensing a relatively close target, there is no need to set an excessively long cyclic prefix. In this case, two sensing OFDM symbols can be sent consecutively. This is equivalent to sending the sensing reference signal twice within the time of a single communication OFDM symbol. This allows for two sensing measurements of the close target, improving sensing accuracy and making sensing more flexible. Furthermore, symbol-level alignment with the wireless communication system can be ensured.

[0049] In conjunction with some embodiments of the first aspect, in some embodiments, the cyclic prefix length M CP is greater than zero and less than or equal to half the length of the OFDM symbol used for perception.

[0050] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0051] According to the cyclic prefix length M CP A perception reference signal is obtained from the received OFDM symbol used for perception.

[0052] In the single-station sensing mode, the sensing transmitter estimates at least one of the distance, angle, speed, etc. of the sensing target by measuring the echo of the sensing reference signal. Therefore, in the above embodiment, the sensing transmitter can receive OFDM symbols for sensing, obtain the sensing reference signal from the received OFDM symbols for sensing according to the determined cyclic prefix length, and measure the sensing reference signal to complete wireless sensing.

[0053] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0054] Sending first information to the perceptual receiver, wherein the first information includes the cyclic prefix length M CP , or the first information is used to determine the cyclic prefix length M CP .

[0055] In the dual-station sensing mode, the sensing transmitter sends a sensing reference signal, and the sensing receiver receives and measures the sensing reference signal to estimate at least one of the distance, angle, speed, etc. of the sensing target. Therefore, in the above embodiment, the sensing transmitter can send first information to the sensing receiver to notify the sensing receiver of the length of the cyclic prefix. The sensing receiver can obtain the sensing reference signal from the received OFDM symbol used for sensing based on the length of the cyclic prefix, and measure the sensing reference signal to complete wireless sensing.

[0056] In conjunction with some embodiments of the first aspect, in some embodiments, sending the first information to the perceptual receiver includes:

[0057] Sending the first information to the sensing receiver via downlink control information (DCI); or,

[0058] The first information is sent to the sensing receiver via a Radio Resource Control (RRC) message.

[0059] In conjunction with some embodiments of the first aspect, in some embodiments, the first information includes at least one of the following:

[0060] The number L of OFDM symbols used for sensing;

[0061] The M CP ;

[0062] The discrete Fourier transform length M of the OFDM symbol used for perception DFT ;

[0063] The M CPWith the M DFT The cyclic prefix length ratio between

[0064] The M CP A cyclic prefix length ratio between the length of the OFDM symbol used for perception and the length of the OFDM symbol used for perception;

[0065] The subcarrier bandwidth of the OFDM symbol used for perception;

[0066] a subcarrier bandwidth ratio between the subcarrier bandwidth of the OFDM symbol used for sensing and the subcarrier bandwidth of the OFDM symbol used for communication;

[0067] A first index represents a logarithmic result of the subcarrier bandwidth ratio.

[0068] In the above embodiment, the perceptual receiver may determine the cyclic prefix length according to at least one of the above parameters.

[0069] In a second aspect, an embodiment of the present disclosure provides a perception method, which is performed by a perception receiver. The method includes:

[0070] receiving first information sent by a sensing transmitter;

[0071] Determine the cyclic prefix length M according to the first information CP ;

[0072] According to the cyclic prefix length M CP A sensing reference signal is obtained from the received OFDM symbols used for sensing.

[0073] In the above embodiment, the perception receiver receives first information, determines the length of the cyclic prefix based on the first information, obtains a perception reference signal from the received OFDM symbol for perception based on the length of the cyclic prefix, and measures the perception reference signal, thereby completing wireless perception.

[0074] In conjunction with some embodiments of the second aspect, in some embodiments, the cyclic prefix length M CP Positively correlated with the maximum perceived distance within the perceived target range.

[0075] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0076] L OFDM symbols for perception are received, where the L OFDM symbols for perception are continuous in the time domain, and L is an integer greater than or equal to 1.

[0077] In combination with some embodiments of the second aspect, in some embodiments, the total length of the L OFDM symbols used for perception is equal to the length of the OFDM symbol used for communication.

[0078] In conjunction with some embodiments of the second aspect, in some embodiments, the cyclic prefix length M CP is greater than zero and less than or equal to half the length of the OFDM symbol used for perception.

[0079] In conjunction with some embodiments of the second aspect, in some embodiments, the receiving and sensing first information sent by the transmitter includes:

[0080] Receiving the first information sent by the sensing transmitter through DCI; or,

[0081] The first information sent by the sensing transmitter is received through an RRC message.

[0082] In conjunction with some embodiments of the second aspect, in some embodiments, the first information includes at least one of the following:

[0083] The number L of OFDM symbols used for sensing;

[0084] The M CP ;

[0085] The discrete Fourier transform length M of the OFDM symbol used for perception DFT ;

[0086] The M CP With the M DFT The cyclic prefix length ratio between

[0087] The M CP A cyclic prefix length ratio between the length of the OFDM symbol used for perception and the length of the OFDM symbol used for perception;

[0088] The subcarrier bandwidth of the OFDM symbol used for perception;

[0089] a subcarrier bandwidth ratio between the subcarrier bandwidth of the OFDM symbol used for sensing and the subcarrier bandwidth of the OFDM symbol used for communication;

[0090] A first index represents a logarithmic result of the subcarrier bandwidth ratio.

[0091] In a third aspect, an embodiment of the present disclosure provides a perceptual transmitter, including:

[0092] A processing module configured to determine a cyclic prefix length M based on the perceived target range CP ;

[0093] The transceiver module is configured to send an OFDM symbol for sensing, wherein the OFDM symbol for sensing includes a sensing reference signal and a length of M. CP cyclic prefix.

[0094] In a fourth aspect, an embodiment of the present disclosure provides a perceptual receiver, including:

[0095] a transceiver module, configured to receive first information sent by the sensing transmitter;

[0096] A processing module configured to determine a cyclic prefix length M according to the first information CP ;

[0097] The processing module is further configured to: CP A sensing reference signal is obtained from the received OFDM symbols used for sensing.

[0098] 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.

[0099] 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.

[0100] In the seventh aspect, an embodiment of the present disclosure proposes a perception system, comprising: a perception transmitter, 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; and a perception receiver, 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] It is understandable that the aforementioned sensing transmitters, sensing receivers, sensing devices, sensing systems, storage media, program products, computer programs, chips, or chip systems are all used to perform the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can be referenced to the beneficial effects of the corresponding methods and will not be repeated here.

[0106] The present disclosure provides a perception method, a perception transmitter, a perception receiver, and a system. In some embodiments, the perception transmitter can be described alternatively as a terminal, a network device, a first device, a perception transmitting end, a wireless transmitting end, etc., and the perception receiver can be described alternatively as a terminal, a network device, a second device, a perception receiving end, a wireless receiving end, etc.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0112] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

[0121] 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.

[0122] 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.

[0123] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0124] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0125] 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.

[0126] 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.

[0127] Wireless sensing typically requires estimating the target's range, azimuth angle (such as horizontal and vertical angles), and velocity. Broadly speaking, sensing also includes wireless tracking and radio frequency identification of the target. To achieve high-precision sensing, a sensing transmitter typically transmits a dedicated reference signal for sensing, which, for ease of description, will be referred to as a sensing reference signal. Optionally, the sensing reference signal does not carry any information or data used for communication.

[0128] FIG1 is a schematic diagram of a perception system according to an embodiment of the present disclosure. As shown in FIG1 , the perception system 100 may include a perception transmitter 101 and a perception receiver 102 .

[0129] In some embodiments, in a monostatic mode, the sensing transmitter 101 may transmit a sensing reference signal and estimate at least one of the distance, angle, and speed of the sensing target by measuring an echo of the sensing reference signal.

[0130] In some embodiments, in a bistatic mode, the sensing transmitter 101 may transmit a sensing reference signal, and the sensing receiver 102 may receive and measure the sensing reference signal to estimate at least one of the distance, angle, and speed of the sensing target.

[0131] It should be noted that the number of cognitive transmitters and the number of cognitive receivers 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 cognitive transmitters and one or more cognitive receivers.

[0132] It can be understood that the perception system in the embodiment of the present disclosure can correspond to a variety of perception scenarios, for example, it can be used for perception between terminals, or for perception between terminals and network devices, or for perception between network devices and network devices, etc.

[0133] In some embodiments, the sensing transmitter may be located in a terminal or a network device.

[0134] In some embodiments, the perceptual receiver may be located in a terminal or a network device.

[0135] In one example, the perceptual transmitter and the perceptual receiver may be located in a network device.

[0136] In one example, the perceptual transmitter may be located in a network device, and the perceptual receiver may be located in a terminal.

[0137] In one example, the perceptual transmitter may be located in a terminal, and the perceptual receiver may be located in a network device.

[0138] In one example, the perceptual transmitter and the perceptual receiver may be located in a terminal.

[0139] 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 communication 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.

[0140] 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.

[0141] Based on the perception system shown in Figure 1, taking the estimation of the distance of the perception target as an example, the perception receiver needs to accurately estimate the arrival time of the first echo path reflected by the perception target (single-station mode) or the first path scattered by the perception target (dual-station mode). It should be understood that wireless perception is sensitive to interference. In order to ensure the accuracy of wireless perception, the interference received by the perception receiver when measuring the perception reference signal should be avoided as much as possible. In the OFDM system, if the multipath delay spread of the wireless channel is greater than the length of the cyclic prefix (CP) in the OFDM symbol, inter-symbol interference (ISI) will occur between OFDM symbols. As long as the multipath delay spread of the channel is less than the length of the cyclic prefix in the OFDM symbol, inter-symbol interference (ISI) can be eliminated.

[0142] In one implementation, when sending a perception reference signal, the perception transmitter may send an OFDM symbol carrying the perception reference signal according to a parameter set (numerology) used in an existing wireless communication system, where the parameter set includes parameters such as the sampling rate, subcarrier bandwidth, number of fast Fourier transform (FFT) points, and length of the cyclic prefix used by the communication system. It should be noted that in the embodiments of the present disclosure, terms such as the OFDM symbol carrying the perception reference signal, the OFDM symbol used for perception, and the OFDM symbol for perception may be interchangeable. In the embodiments of the present disclosure, terms such as the OFDM symbol carrying the communication signal, the OFDM symbol used for communication, and the OFDM symbol for communication may be interchangeable, where the communication signal may carry information or data for communication. The OFDM symbol used for perception includes a cyclic prefix and a perception reference signal. Optionally, the OFDM symbol used for perception also includes an empty resource element. The OFDM symbol used for communication includes a cyclic prefix and a communication signal.

[0143] Figure 2a shows an exemplary schematic diagram of multiple OFDM symbols that are continuous in the time domain, wherein the first OFDM symbol is used for communication, the second OFDM symbol is used for sensing, and the third OFDM symbol is used for communication. As shown in Figure 2a, the OFDM symbol used for sensing and the OFDM symbol used for communication use the same OFDM symbol structure. For example, the OFDM symbol used for communication includes a cyclic prefix and a communication signal, wherein the cyclic prefix is ​​represented by N CP sampling points, the communication signal is represented by N FFT sampling points, the length of the OFDM symbol is N OFDM , N OFDM =N CP +N FFTThe OFDM symbol used for perception includes a cyclic prefix and a perception reference signal, and its cyclic prefix is ​​also represented by N CP sampling points, the perception reference signal is also expressed as N FFT sampling points, the length of the OFDM symbol is the same as the length of the OFDM symbol used for communication, which is also N OFDM .

[0144] In existing wireless communication systems, to avoid inter-symbol interference (ISI) and minimize cyclic prefix overhead, the length of the cyclic prefix in an OFDM symbol is generally equal to or slightly longer than the maximum multipath delay spread of the channel. Consequently, transmitting OFDM symbols carrying sensing reference signals according to the parameter sets used in existing wireless communication systems significantly limits the ISI-free sensing range.

[0145] In one example, for monostatic mode, the maximum sensing distance without ISI is fs is the sampling rate, N CP is the length of the cyclic prefix of the OFDM symbol used for communication (expressed as the number of sampling points), and c is the speed of light.

[0146] In one example, for bistatic mode, in the “Tx-target-Rx” single hop case, the maximum sensing distance without ISI is Wherein, dTx-Rx is the line-of-sight (LoS) distance between the sensing transmitter and the sensing receiver.

[0147] Therefore, the embodiments of the present disclosure consider proposing a flexible OFDM symbol structure design. In the embodiments of the present disclosure, the OFDM symbols used for sensing and the OFDM symbols used for communication can use different OFDM symbol structures. For example, the cyclic prefix length of the OFDM symbols used for sensing can be different from the cyclic prefix length of the OFDM symbols used for communication. For the sake of distinction, the cyclic prefix length of the OFDM symbols used for communication will be denoted as N in the following text. CP , the cyclic prefix length of the OFDM symbol used for perception is recorded as M CP .

[0148] The main idea of ​​the OFDM symbol structure design for perception proposed in the embodiment of the present disclosure is that the length of the cyclic prefix of each OFDM symbol for perception can be flexibly configured. It can be understood that each OFDM symbol for perception includes a cyclic prefix and a perception reference signal. Optionally, the cyclic prefix is ​​represented by M CP sampling points, the perception reference signal is expressed as M DFT sampling points.

[0149] In some embodiments, in order to ensure alignment with the OFDM symbol used for communication, the length of each OFDM symbol used for perception (including the cyclic prefix) may be equal to the length of the OFDM symbol used for communication (including the cyclic prefix). CP +M DFT =N OFDM .

[0150] According to the above embodiment, FIG2b shows an exemplary schematic diagram of a plurality of consecutive OFDM symbols in the time domain.

[0151] In some embodiments, for an OFDM symbol set for sensing, the OFDM symbol set is composed of L consecutive OFDM symbols for sensing in the time domain, wherein the length of the cyclic prefix of each OFDM symbol for sensing is flexibly configurable, where L is an integer greater than or equal to 1.

[0152] In some embodiments, to ensure alignment with the OFDM symbols used for communication, for a set of OFDM symbols used for sensing, the total length of the L OFDM symbols used for sensing (including the cyclic prefix) in the set is equal to the length of the OFDM symbol used for communication (including the cyclic prefix). That is, (M CP +M DFT )·L=N OFDM Among them, M CP +M DFT It can represent the length of a single OFDM symbol used for perception, that is, M CP +M DFT =N OFDM / L=(N CP +N FFT ) / L.

[0153] According to the above embodiment, FIG2c shows an exemplary schematic diagram of multiple OFDM symbols continuous in the time domain when L>1 (e.g., L=2). It can be understood that when L=1, multiple OFDM symbols continuous in the time domain can be seen in the schematic diagram of FIG2b.

[0154] In some embodiments, the sensing transmitter can keep the sampling rate fs unchanged and flexibly adjust the number L of OFDM symbols used for sensing, the subcarrier bandwidth and the discrete Fourier transform (DFT) length M DFT Scaling is performed to change the length of the cyclic prefix.

[0155] In some embodiments, the cyclic prefix length M CP is greater than zero and less than or equal to half the length of each OFDM symbol used for perception. For example, N OFDM =N CP +N FFT The total number of sampling points contained in each OFDM symbol (including the cyclic prefix) used for communication.

[0156] According to the above embodiment, one or more sensing OFDM symbols can be sent within the time of one communication OFDM symbol. For example, when sensing a relatively close target, there is no need to set an excessively long cyclic prefix. In this case, two sensing OFDM symbols can be sent consecutively. This is equivalent to sending the sensing reference signal twice within the time of one communication OFDM symbol. This allows two sensing measurements to be performed for the close target, which helps improve sensing accuracy and makes sensing more flexible.

[0157] FIG3 is an interactive diagram illustrating a perception method according to an embodiment of the present disclosure. As shown in FIG3 , the perception method includes:

[0158] Step S3101: The sensing transmitter determines a cyclic prefix length according to a sensed target range.

[0159] In some embodiments, the target range of perception is first determined, for example, a target within a range of 100 meters needs to be perceived, or a target within a range of 90 meters to 200 meters needs to be perceived, and then the required cyclic prefix length M is determined according to the perceived target range. CP In some embodiments, the cyclic prefix length M CP It can be represented by the number of sampling points contained in the cyclic prefix, or it can be represented by the time length of the cyclic prefix.

[0160] In some embodiments, the cyclic prefix length M is determined based on the maximum perceived distance within the perceived target range. CP .

[0161] In some embodiments, the cyclic prefix length M CP It is positively correlated with the maximum perceptual distance within the perceived target range. For example, if the perceived target range is [a, b], then the cyclic prefix length M CP It is positively correlated with the maximum sensing distance b within the target range. On this basis, when it is necessary to sense a target at a close distance, a shorter cyclic prefix can be used, and when it is necessary to sense a target at a longer distance, a longer cyclic prefix can be used, making the length of the cyclic prefix more flexible. In a possible implementation, the cyclic prefix length M CP The positive correlation between the maximum perceived distance and the perceived target range can be linear or nonlinear.

[0162] It can be understood that for the single-station mode, the maximum sensing distance without ISI is For the dual-station mode, in the case of a single hop of "Tx-target-Rx", the maximum sensing distance without ISI is

[0163] From this, we can see that the maximum perception distance without ISI can be changed by flexibly setting the length of the cyclic prefix in the OFDM symbol. For example, by increasing the length of the cyclic prefix in the OFDM symbol, the maximum perception distance without ISI can be increased accordingly, thereby allowing the perception of targets at a farther distance.

[0164] In some embodiments, the maximum perceptual distance d without ISI Max Greater than or equal to the maximum perceived distance within the target range.

[0165] In some embodiments, the maximum sensing distance d may be greater than or equal to the maximum sensing distance within the target range. Max , and according to M CP with d Max The preset relationship (such as one of the above relationships) is satisfied between the two, and the required cyclic prefix length M is determined. CP .

[0166] Step S3102: The perception transmitter sends first information to the perception receiver.

[0167] In some embodiments, a perceptual receiver receives first information sent by a perceptual transmitter.

[0168] In some embodiments, the first information is used to indicate the cyclic prefix length M CP .

[0169] In some embodiments, the first information indicates the cyclic prefix length M CP , which can be a direct indication of the cyclic prefix length M CP For example, the first information includes the cyclic prefix length M CP .

[0170] In some embodiments, the first information indicates the cyclic prefix length M CP , which can be an indirect indication of the cyclic prefix length M CP For example, the first information includes other parameters, which can determine the cyclic prefix length M CP For another example, the first information includes first indication information, and the first indication information is used to dynamically indicate a candidate value from a candidate value set of at least one parameter, and the cyclic prefix length M can be determined according to the candidate value indicated by the first indication information. CP .

[0171] In some embodiments, the name of the first information is not limited, and it can be replaced by, for example, "parameter set (numerology information)".

[0172] In some embodiments, the first information includes at least one of the following parameters:

[0173] (a) The number of OFDM symbols used for perception: L.

[0174] (b) Cyclic prefix length of OFDM symbols used for perception: M CP .

[0175] (c) Discrete Fourier transform (DFT) length of OFDM symbols used for perception: M DFT .

[0176] Alternatively, the DFT length may be alternatively described as the number of DFT points, the DFT size, etc.

[0177] Optionally, the DFT length / number of points / size may be replaced by an inverse discrete Fourier transform (IDFT) length / number of points / size, etc.

[0178] (d) Cyclic prefix length M CP and the discrete Fourier transform length M DFT The cyclic prefix length ratio between

[0179] (e) Cyclic prefix length M CP The ratio of the cyclic prefix length to the length of the OFDM symbol used for perception: or

[0180] In some embodiments, parameter (d) and parameter (e) may be sent alternatively.

[0181] (f) Subcarrier bandwidth of OFDM symbols used for perception:

[0182] (g) Subcarrier bandwidth ratio between the subcarrier bandwidth of the OFDM symbol used for perception and the subcarrier bandwidth of the OFDM symbol used for communication:

[0183] Where Δf (sensing) is the subcarrier bandwidth of the OFDM symbol used for perception, Δf (comm) is the subcarrier bandwidth of the OFDM symbol used for communication.

[0184] (h) First exponent μ sensing , which represents the logarithmic result of the subcarrier bandwidth ratio, e.g.

[0185] In some embodiments, the name of the first index is not limited, and it can be replaced by, for example, a parameter set index, or a parameter set index with reference to a parameter set used for communication.

[0186] In some embodiments, at least one of the above parameters (a) to (h) may be sent to the perceptual receiver.

[0187] In some embodiments, the first information may be sent via at least one of a downlink control information (DCI), a media access control element (MAC CE) message, and a radio resource control (RRC) message. Optionally, the first information is sent to the perceptual receiver via the DCI. Optionally, the first information is sent to the perceptual receiver via an RRC message.

[0188] In some embodiments, at least one of the above parameters (a) to (h) may be sent to the sensing receiver via an RRC message.

[0189] In some embodiments, a candidate value set for at least one of the above parameters (a) to (h) can be configured in the perception receiver via an RRC message. For any candidate value set of a parameter, one of the candidate values ​​in the candidate value set of the parameter can be indicated via DCI. In an optional implementation, a new indication field can be introduced into the existing DCI format or a new DCI format can be defined.

[0190] In one example, the cyclic prefix length is For example, the sensor transmitter configures the cyclic prefix length ratio in the sensor receiver through the RRC message. The candidate value set includes

[0191] Afterwards, the cyclic prefix length ratio can be dynamically indicated by two bits in the DCI. The values ​​are shown in Table 1 below.

[0192] Table 1

[0193] In some embodiments, a candidate value set for at least one of the above parameters (a) to (h) can be configured in the perception receiver via an RRC message. For any candidate value set of a parameter, one or more candidate values ​​in the candidate value set of the parameter can be activated via a MAC CE message, and one of the activated candidate values ​​of the parameter can be indicated via a DCI. Optionally, one or more candidate values ​​in the candidate value set of the parameter can also be deactivated via a MAC CE message.

[0194] In some embodiments, this step is optional. For example, in single-station mode, the sensing transmitter may not send the first information.

[0195] Step S3103: The perceptual receiver determines a cyclic prefix length according to the first information.

[0196] In some embodiments, the sensing receiver determines the cyclic prefix length M of the OFDM symbol used for sensing according to the first information. CP and DFT length M DFT .

[0197] In some embodiments, the sensing receiver determines the number L of OFDM symbols used for sensing and the cyclic prefix length M of each OFDM symbol used for sensing according to the first information. CP and DFT length M DFT .

[0198] Step S3104: The sensing transmitter sends OFDM symbols for sensing.

[0199] In some embodiments, the sensing transmitter sends L OFDM symbols for sensing, and the L OFDM symbols for sensing are continuous in the time domain, that is, the sensing transmitter continuously sends L OFDM symbols for sensing in the time domain. Each OFDM symbol for sensing includes a sensing reference signal and a length of M. CP Optionally, the cyclic prefix is ​​expressed as M CP sampling points, the perception reference signal is expressed as M DFT sampling points, where L is an integer greater than or equal to 1.

[0200] In some embodiments, the OFDM symbol used for sensing also includes empty resource elements, depending on the pattern of the sensing reference signal. In other words, excluding the cyclic prefix, the sensing reference signal does not occupy all subcarriers of the OFDM symbol used for sensing.

[0201] In some embodiments, the sensing transmitter sends each OFDM symbol for sensing, which may include: mapping the sensing reference signal carried on the OFDM symbol into a signal having a length of M according to its pattern. DFTThe first sequence of M DFT The inverse discrete Fourier transform (IDFT) of the point is used to obtain the second sequence, and the last M of the second sequence is CP The sampling points are inserted into the head of the second sequence as a cyclic prefix to obtain a third sequence, and the third sequence is sent.

[0202] In step S3105 , the sensing receiver obtains a sensing reference signal from the received OFDM symbol for sensing according to the cyclic prefix length.

[0203] In some embodiments, the sensing receiver receives OFDM symbols for sensing, and selects the OFDM symbols according to the cyclic prefix length M. CP A sensing reference signal is obtained from the received OFDM symbols used for sensing, and the sensing reference signal is measured, thereby achieving wireless sensing.

[0204] In some embodiments, the sensing receiver receives L OFDM symbols for sensing, and the cyclic prefix length M is used to determine the number of OFDM symbols to be sensed. CP A sensing reference signal is obtained from each received OFDM symbol used for sensing, and the sensing reference signal is measured to achieve wireless sensing. For each OFDM symbol used for sensing, the cyclic prefix of the OFDM symbol is removed, and then M DFT The discrete Fourier transform (DFT) of the point is performed to obtain the perceptual reference signal.

[0205] According to the above embodiment, the sensing transmitter can flexibly adjust the length M of the cyclic prefix in the OFDM symbol according to the sensing target range. CP or ratio ( or or ), which helps expand the range of distance perception without ISI. Furthermore, the perception system and wireless communication system do not interfere with each other and can ensure symbol-level alignment with the wireless communication system, making it completely transparent to the wireless communication system.

[0206] The sensing method according to the embodiments of the present disclosure may include at least one of steps S3101 to S3105. For example, step S3101 may be implemented as an independent embodiment, steps S3101 and S3104 may be implemented as independent embodiments, steps S3101, S3102, and S3104 may be implemented as independent embodiments, and steps S3103 and S3105 may be implemented as independent embodiments, but the present invention is not limited thereto.

[0207] In some embodiments, step S3102, step S3103, and step S3105 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0208] FIG4a is a flow chart of a sensing method according to an embodiment of the present disclosure. Optionally, the sensing method is applied to a sensing transmitter. As shown in FIG4a , the sensing method includes:

[0209] Step S4101: determine a cyclic prefix length according to a perceived target range.

[0210] In some embodiments, the cyclic prefix length M is determined based on the maximum perceived distance within the perceived target range. CP .

[0211] In some embodiments, the cyclic prefix length M CP Positively correlated with the maximum perceived distance within the perceived target range.

[0212] The optional implementation of step S4101 can refer to the optional implementation of step S3101 in Figure 3 and other related parts in the embodiment involved in Figure 3, which will not be repeated here.

[0213] Step S4102: Send first information to the perception receiver.

[0214] In some embodiments, the first information is used to indicate the cyclic prefix length M CP .

[0215] In some embodiments, the first information indicates the cyclic prefix length M CP , which can be a direct indication of the cyclic prefix length M CP For example, the first information includes the cyclic prefix length M CP .

[0216] In some embodiments, the first information indicates the cyclic prefix length M CP , which can be an indirect indication of the cyclic prefix length M CP For example, the first information includes other parameters, which can determine the cyclic prefix length M CP For another example, the first information includes first indication information, and the first indication information is used to dynamically indicate a candidate value from a candidate value set of at least one parameter, and the cyclic prefix length M can be determined according to the candidate value indicated by the first indication information. CP .

[0217] In some embodiments, the first information may be sent to the sensing receiver via DCI.

[0218] In some embodiments, the first information may be sent to the sensing receiver via an RRC message.

[0219] The optional implementation of step S4102 can refer to the optional implementation of step S3102 in Figure 3 and other related parts in the embodiment involved in Figure 3, which will not be repeated here.

[0220] Step S4103: Send OFDM symbols for sensing.

[0221] In some embodiments, L OFDM symbols for sensing are sent, and the L OFDM symbols for sensing are continuous in the time domain, that is, L OFDM symbols for sensing are sent continuously in the time domain, where L is an integer greater than or equal to 1.

[0222] The optional implementation of step S4103 can refer to the optional implementation of step S3104 in Figure 3 and other related parts in the embodiment involved in Figure 3, which will not be repeated here.

[0223] According to the above embodiment, the perception transmitter can flexibly adjust the length of the cyclic prefix in the OFDM symbol according to the target range of perception, and in the dual-station mode, can send first information to the perception receiver to notify the perception receiver of the length of the cyclic prefix. The perception receiver can obtain a perception reference signal from the received OFDM symbol for perception according to the length of the cyclic prefix, and measure the perception reference signal, thereby completing wireless perception.

[0224] FIG4b is a flow chart of a sensing method according to an embodiment of the present disclosure. Optionally, the sensing method is applied to a sensing transmitter. As shown in FIG4b , the sensing method includes:

[0225] Step S4201: Determine a cyclic prefix length according to a perceived target range.

[0226] In some embodiments, the cyclic prefix length M is determined based on the maximum perceived distance within the perceived target range. CP .

[0227] In some embodiments, the cyclic prefix length M CP Positively correlated with the maximum perceived distance within the perceived target range.

[0228] The optional implementation of step S4201 can refer to the optional implementation of step S3101 in Figure 3 and other related parts in the embodiment involved in Figure 3, which will not be repeated here.

[0229] Step S4202: Send OFDM symbols for sensing.

[0230] In some embodiments, L OFDM symbols for sensing are sent, and the L OFDM symbols for sensing are continuous in the time domain, that is, L OFDM symbols for sensing are sent continuously in the time domain, where L is an integer greater than or equal to 1.

[0231] In some embodiments, in single-station mode, the sensing transmitter receives OFDM symbols for sensing.

[0232] In some embodiments, in single-station mode, the sensing transmitter receives L OFDM symbols for sensing.

[0233] The optional implementation of step S4202 can refer to the optional implementation of step S3104 in Figure 3 and other related parts in the embodiment involved in Figure 3, which will not be repeated here.

[0234] Step S4203: Obtain a perception reference signal from the received OFDM symbol for perception according to the cyclic prefix length.

[0235] According to the above embodiment, the perception transmitter can flexibly adjust the length of the cyclic prefix in the OFDM symbol according to the target range of perception, and in the single-station mode, the perception transmitter can receive the OFDM symbol for perception, obtain the perception reference signal from the received OFDM symbol for perception according to the determined cyclic prefix length, and measure the perception reference signal, thereby completing wireless perception.

[0236] FIG5 is a flow chart of a perception method according to an embodiment of the present disclosure. Optionally, the perception method is applied to a perception receiver. As shown in FIG5 , the perception method includes:

[0237] Step S5101: Receive first information sent by a sensing transmitter.

[0238] In some embodiments, the first information is used to indicate the cyclic prefix length M CP .

[0239] In some embodiments, the first information indicates the cyclic prefix length M CP , which can be a direct indication of the cyclic prefix length M CP For example, the first information includes the cyclic prefix length M CP .

[0240] In some embodiments, the first information indicates the cyclic prefix length M CP , which can be an indirect indication of the cyclic prefix length M CP For example, the first information includes other parameters, which can determine the cyclic prefix length M CPFor another example, the first information includes first indication information, and the first indication information is used to dynamically indicate a candidate value from a candidate value set of at least one parameter, and the cyclic prefix length M can be determined according to the candidate value indicated by the first indication information. CP .

[0241] In some embodiments, the first information sent by the sensing transmitter can be received via DCI.

[0242] In some embodiments, the first information sent by the perception transmitter may be received via an RRC message.

[0243] The optional implementation of step S5101 can refer to the optional implementation of step S3102 in Figure 3 and other related parts in the embodiment involved in Figure 3, which will not be repeated here.

[0244] Step S5102: Determine the cyclic prefix length according to the first information.

[0245] In some embodiments, the cyclic prefix length may be determined based on at least one of the above parameters (a) to (h).

[0246] Exemplarily, the first information includes the number L of OFDM symbols used for perception and the cyclic prefix length ratio Since the length N of the OFDM symbol used for communication OFDM It is known that the length relationship between the L OFDM symbols used for perception and the OFDM symbols used for communication (M CP +M DFT )·L=N OFDM , determine the cyclic prefix length M CP and DFT length M DFT .

[0247] Step S5103: Obtain a perception reference signal from the received OFDM symbol for perception according to the cyclic prefix length.

[0248] In some embodiments, the sensing receiver receives OFDM symbols for sensing, and selects the OFDM symbols according to the cyclic prefix length M. CP A sensing reference signal is obtained from the received OFDM symbols used for sensing, and the sensing reference signal is measured, thereby achieving wireless sensing.

[0249] In some embodiments, the sensing receiver receives L OFDM symbols for sensing, and the cyclic prefix length M is used to determine the number of OFDM symbols to be sensed. CP A sensing reference signal is obtained from each received OFDM symbol used for sensing, and the sensing reference signal is measured to achieve wireless sensing. For each OFDM symbol used for sensing, the cyclic prefix of the OFDM symbol is removed, and then MDFT The discrete Fourier transform (DFT) of the point is performed to obtain the perceptual reference signal.

[0250] According to the above embodiment, the perception receiver can receive the first information sent by the perception transmitter, determine the length of the cyclic prefix based on the first information, obtain the perception reference signal from the received OFDM symbol for perception based on the length of the cyclic prefix, and measure the perception reference signal, thereby completing wireless perception.

[0251] 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 the steps performed by the transmitter in any of the above methods. For another example, another device is provided that includes units or modules for implementing the steps performed by the receiver in any of the above methods.

[0252] 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.

[0253] 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.

[0254] Figure 6a is a schematic diagram of the structure of the perception transmitter proposed in an embodiment of the present disclosure. As shown in Figure 6a, the perception transmitter 6100 may include: at least one of a transceiver module 6101, a processing module 6102, etc. In some embodiments, the processing module is used to determine the cyclic prefix length based on the target range of perception. The transceiver module is used to send OFDM symbols for perception. Optionally, the transceiver module is used to perform at least one of the communication steps such as sending and / or receiving (for example, step S3102, step S3104, but not limited thereto) performed by the perception transmitter 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 (for example, step S3101, but not limited thereto) performed by the perception transmitter in any of the above methods, which will not be repeated here.

[0255] Figure 6b is a schematic diagram of the structure of the perception receiver proposed in an embodiment of the present disclosure. As shown in Figure 6b, the perception receiver 6200 may include: at least one of a transceiver module 6201, a processing module 6202, etc. In some embodiments, the transceiver module is used to receive the first information sent by the perception transmitter. The processing module is used to determine the cyclic prefix length based on the first information. The processing module is used to obtain a perception reference signal from the received OFDM symbol for perception based on the cyclic prefix length. Optionally, the transceiver module is used to perform at least one of the communication steps such as sending and / or receiving performed by the perception 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 S3103, step S3105, but not limited to this) performed by the perception receiver in any of the above methods, which will not be repeated here.

[0256] 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.

[0257] 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.

[0258] Figure 7a is a schematic diagram of the structure of a communication device 7100 proposed in an embodiment of the present disclosure. The communication device 7100 can be a network device (such as an access network device, etc.), or a terminal (such as a user device, etc.), or a chip, chip system, or processor that supports the network device to implement any of the above methods, or a chip, chip system, or processor that supports the terminal to implement any of the above methods. The communication device 7100 can be used to implement the method described in the above method embodiment. For details, please refer to the description in the above method embodiment. In some embodiments, the communication device 7100 can implement the method described in the above method embodiment for application to a perceptual transmitter. In some embodiments, the communication device 7100 can implement the method described in the above method embodiment for application to a perceptual receiver.

[0259] As shown in Figure 7a, the communication device 7100 includes one or more processors 7101. The processor 7101 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 the communication device (such as a base station, baseband chip, terminal device, terminal device chip, DU or CU, etc.), execute programs, and process program data. The communication device 7100 is used to perform any of the above methods.

[0260] In some embodiments, the communication device 7100 further includes one or more memories 7102 for storing instructions. Optionally, all or part of the memories 7102 may be located outside the communication device 7100.

[0261] In some embodiments, the communication device 7100 further includes one or more transceivers 7103. When the communication device 7100 includes one or more transceivers 7103, the transceiver 7103 performs at least one of the communication steps such as sending and / or receiving in the above method (for example, step S3102 and step S3104, but not limited thereto), and the processor 7101 performs at least one of the other steps (for example, step S3101, step S3103, and step S3105, but not limited thereto).

[0262] 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.

[0263] In some embodiments, the communication device 7100 may include one or more interface circuits. Optionally, the interface circuits are connected to the memory 7102 and may be used to receive signals from the memory 7102 or other devices, or to send signals to the memory 7102 or other devices. For example, the interface circuits may read instructions stored in the memory 7102 and send the instructions to the processor 7101.

[0264] The communication device 7100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 7100 described in the present disclosure is not limited thereto, and the structure of the communication device 7100 may not be limited by FIG. 7a. 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 or 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.

[0265] FIG7 b is a schematic diagram of the structure of a chip 7200 according to an embodiment of the present disclosure. If the communication device 7100 can be a chip or a chip system, reference can be made to the schematic diagram of the structure of the chip 7200 shown in FIG7 b , but the present disclosure is not limited thereto.

[0266] The chip 7200 includes one or more processors 7201 , and the chip 7200 is configured to execute any of the above methods.

[0267] In some embodiments, the chip 7200 further includes one or more interface circuits 7202. Optionally, the interface circuit 7202 is connected to the memory 7203. The interface circuit 7202 can be used to receive signals from the memory 7203 or other devices, and can be used to send signals to the memory 7203 or other devices. For example, the interface circuit 7202 can read instructions stored in the memory 7203 and send the instructions to the processor 7201.

[0268] In some embodiments, the interface circuit 7202 executes at least one of the communication steps such as sending and / or receiving in the above method (for example, step S3102, step S3104, but not limited to these), and the processor 7201 executes at least one of the other steps (for example, step S3101, step S3103, step S3105, but not limited to these).

[0269] In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

[0270] In some embodiments, the chip 7200 further includes one or more memories 7203 for storing instructions. Alternatively, all or part of the memories 7203 may be located outside the chip 7200.

[0271] The present disclosure also proposes a storage medium having instructions stored thereon. When the instructions are executed on the communication device 7100, the communication device 7100 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 temporary storage medium.

[0272] The present disclosure also provides a program product, which, when executed by the communication device 7100, enables the communication device 7100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0273] 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 sensing transmitter, the method includes: Determine the cyclic prefix length M based on the perceived target range CP ; Send an orthogonal frequency division multiplexing OFDM symbol for sensing, wherein the OFDM symbol for sensing includes a sensing reference signal and a length of M CP cyclic prefix.

2. The method according to claim 1, characterized in that: The M CP Positively correlated with the maximum perceived distance within the perceived target range.

3. The method according to claim 1 or 2, characterized in that: The sending of OFDM symbols for sensing includes: L OFDM symbols for sensing are sent, where the L OFDM symbols for sensing are continuous in the time domain, and L is an integer greater than or equal to 1.

4. The method according to claim 3, characterized in that The total length of the L OFDM symbols used for sensing is equal to the length of the OFDM symbol used for communication.

5. The method according to any one of claims 1 to 4, characterized in that: The M CP is greater than zero and less than or equal to half of the length of the OFDM symbol used for perception.

6. The method according to any one of claims 1 to 5, characterized in that: The method further comprises: According to the M CP A perception reference signal is obtained from the OFDM symbol used for perception.

7. The method according to any one of claims 1 to 5, characterized in that: The method further comprises: Sending first information to the perceptual receiver, wherein the first information includes the M CP , or the first information is used to determine the M CP .

8. The method according to claim 7, characterized in that The sending the first information to the perception receiver includes: Sending the first information to the perception receiver via downlink control information DCI; or, The first information is sent to the perception receiver via a radio resource control RRC message.

9. The method according to claim 7 or 8, characterized in that: The first information includes at least one of the following: The number L of OFDM symbols used for sensing; The M CP ; The discrete Fourier transform length M of the OFDM symbol used for perception DFT ; The M CP With the M DFT The cyclic prefix length ratio between The M CP A cyclic prefix length ratio between a length of a sensing OFDM symbol and a length of a sensing OFDM symbol; The subcarrier bandwidth of the OFDM symbol used for sensing; a subcarrier bandwidth ratio between the subcarrier bandwidth of the OFDM symbol used for sensing and the subcarrier bandwidth of the OFDM symbol used for communication; A first index represents a logarithmic result of the subcarrier bandwidth ratio.

10. A sensing method, characterized in that: Executed by a perceptual receiver, the method comprises: receiving first information sent by a sensing transmitter; Determine the cyclic prefix length M according to the first information CP ; According to the M CP A sensing reference signal is obtained from the received OFDM symbols for sensing.

11. The method according to claim 10, characterized in that The M CP Positively correlated with the maximum perceived distance within the perceived target range.

12. The method according to claim 10 or 11, characterized in that: The method further comprises: L OFDM symbols for sensing are received, where the L OFDM symbols for sensing are continuous in the time domain, and L is an integer greater than or equal to 1.

13. The method according to claim 12, characterized in that The total length of the L OFDM symbols used for sensing is equal to the length of the OFDM symbol used for communication.

14. The method according to any one of claims 10 to 13, characterized in that: The M CP is greater than zero and less than or equal to half of the length of the OFDM symbol used for perception.

15. The method according to any one of claims 10 to 14, characterized in that: The receiving sensing first information sent by the transmitter includes: Receiving the first information sent by the sensing transmitter through DCI; or, The first information sent by the sensing transmitter is received through an RRC message.

16. The method according to any one of claims 10 to 15, characterized in that: The first information includes at least one of the following: The number L of OFDM symbols used for sensing; The M CP ; The discrete Fourier transform length M of the OFDM symbol used for perception DFT ; The M CP With the M DFT The cyclic prefix length ratio between The M CP A cyclic prefix length ratio between a length of a sensing OFDM symbol and a length of a sensing OFDM symbol; The subcarrier bandwidth of the OFDM symbol used for sensing; a subcarrier bandwidth ratio between the subcarrier bandwidth of the OFDM symbol used for sensing and the subcarrier bandwidth of the OFDM symbol used for communication; A first index represents a logarithmic result of the subcarrier bandwidth ratio.

17. A sensing transmitter, characterized in that include: A processing module configured to determine a cyclic prefix length M according to a perceived target range CP ; The transceiver module is configured to send an OFDM symbol for sensing, wherein the OFDM symbol for sensing includes a sensing reference signal and a length of M. CP cyclic prefix.

18. A perceptual receiver, characterized in that: include: A transceiver module is configured to receive first information sent by a sensing transmitter; A processing module, configured to determine a cyclic prefix length M according to the first information CP ; The processing module is further configured to CP A sensing reference signal is obtained from the received OFDM symbols for sensing.

19. 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 1-9.

20. 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 10-16.

21. A perception system, characterized in that: include: A sensing transmitter, configured to execute the sensing method according to any one of claims 1 to 9; A perception receiver, used to execute the perception method according to any one of claims 10 to 16.

22. A storage medium storing instructions, characterized in that: When the instruction is executed on the communication device, the communication device executes the sensing method as described in any one of claims 1-9 or 10-16.

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