WO2025050299A1 - Sensing methods, sensing transmitter, sensing receiver, and system - Google Patents

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 M_CP 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 M_CP. 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

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

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

Summary of the invention

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

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:

Determine the cyclic prefix length M _CP according to the perceived target range;

An orthogonal frequency division multiplexing (OFDM) symbol for sensing is sent, where the OFDM symbol for sensing includes a sensing reference signal and a cyclic prefix with a length of M _CP .

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:

receiving first information sent by a sensing transmitter;

Determine a cyclic prefix length M _CP according to the first information;

A perception reference signal is obtained from the received OFDM symbol for perception according to the M _CP .

According to a third aspect of an embodiment of the present disclosure, a perceptual transmitter is proposed, including:

A processing module configured to determine a cyclic prefix length M _CP according to a perceived target range;

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 cyclic prefix with a length of M _CP .

According to a fourth aspect of an embodiment of the present disclosure, a perceptual receiver is proposed, including:

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 _CP according to the first information;

The processing module is further configured to obtain a perception reference signal from the received OFDM symbol for perception according to the M _CP .

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.

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.

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.

According to the eighth aspect of an 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 an embodiment of the present disclosure or the perception method proposed in the second aspect of an embodiment of the present disclosure.

The embodiments of the present disclosure can extend the ISI-free distance perception range of wireless sensing.

BRIEF DESCRIPTION OF THE DRAWINGS

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

FIG. 1 is an exemplary schematic diagram of the architecture of a perception system provided according to an embodiment of the present disclosure.

FIG. 2 a is an exemplary schematic diagram of a plurality of OFDM symbols continuous in the time domain provided according to a parameter set used by a communication system.

FIG. 2 b is an exemplary schematic diagram of a plurality of OFDM symbols continuous in the time domain according to an embodiment of the present disclosure.

FIG. 2c is an exemplary schematic diagram of a plurality of OFDM symbols continuous in the time domain according to an embodiment of the present disclosure.

FIG. 3 is an exemplary interaction diagram of a perception method provided according to an embodiment of the present disclosure.

FIG. 4 a is an exemplary flow chart of a perception method provided according to an embodiment of the present disclosure.

FIG. 4 b is an exemplary flow chart of a perception method provided according to an embodiment of the present disclosure.

FIG. 5 is an exemplary flow chart of a perception method provided according to an embodiment of the present disclosure.

FIG. 6 a is an exemplary schematic diagram of the structure of a perceptual transmitter provided according to an embodiment of the present disclosure.

FIG6b is an exemplary schematic diagram of the structure of a perceptual receiver provided according to an embodiment of the present disclosure.

FIG. 7 a is an exemplary schematic diagram of the structure of a communication device provided according to an embodiment of the present disclosure.

FIG. 7 b is an exemplary schematic diagram of the structure of a chip provided according to an embodiment of the present disclosure.

DETAILED DESCRIPTION

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

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

Determine the cyclic prefix length M _CP according to the perceived target range;

An orthogonal frequency division multiplexing (OFDM) symbol for sensing is sent, where the OFDM symbol for sensing includes a sensing reference signal and a cyclic prefix with a length of M _CP .

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.

In combination with some embodiments of the first aspect, in some embodiments, the cyclic prefix length M _CP is positively correlated with the maximum perception distance within the perceived target range.

In the above embodiment, the cyclic prefix length is positively correlated with the maximum perception distance within the perceived target range. When a close target needs to be perceived, a shorter cyclic prefix can be used. When a distant target needs to be perceived, a longer cyclic prefix can be used, making the length of the cyclic prefix more flexible.

In combination with some embodiments of the first aspect, in some embodiments, sending an OFDM symbol 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.

In the above embodiment, one or more OFDM symbols for sensing may be continuously sent in the time domain.

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.

In the above embodiment, one or more perception OFDM symbols may be sent within the time of one communication OFDM symbol. For example, when it is necessary to perceive a target at a relatively close distance, it is not necessary to set an excessively long cyclic prefix. Then, it is possible to consider sending two perception OFDM symbols in succession, which is equivalent to sending two perception reference signals within the time of one communication OFDM symbol, thereby performing two perception measurements for the perception target at a close distance, which is beneficial to improving the accuracy of perception and making perception more flexible. Moreover, it is possible to ensure symbol-level alignment with the wireless communication system.

In combination 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 of the length of the OFDM symbol used for perception.

In combination with some embodiments of the first aspect, in some embodiments, the method further includes:

A perception reference signal is obtained from the received OFDM symbol for perception according to the cyclic prefix length M _CP .

In the single-station sensing mode, the sensing transmitter measures the echo of 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 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.

In combination with some embodiments of the first aspect, in some embodiments, the method further includes:

First information is sent to a perceptual receiver, where the first information includes the cyclic prefix length M _CP , or the first information is used to determine the cyclic prefix length M _CP .

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, thereby estimating at least one of the distance, angle, speed, etc. of the sensing target. Therefore, in the above embodiment, the sensing transmitter can send the first information to the sensing receiver, thereby notifying the sensing receiver of the length of the cyclic prefix. The sensing receiver can obtain the sensing reference signal from the received OFDM symbol for sensing according to the length of the cyclic prefix, and measure the sensing reference signal, thereby completing wireless sensing.

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

Sending the first information to the sensing receiver via downlink control information (Downlink Control Information, DCI); or,

The first information is sent to the perception receiver via a Radio Resource Control (RRC) message.

In conjunction with some embodiments of the first aspect, in some embodiments, 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 _DFT of the OFDM symbol used for perception;

a cyclic prefix length ratio between the M _CP and the M _DFT ;

a cyclic prefix length ratio between the M _CP and the length of the OFDM symbol used for sensing;

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.

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

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

receiving first information sent by a sensing transmitter;

Determine a cyclic prefix length M _CP according to the first information;

A perception reference signal is obtained from the received OFDM symbol for perception according to the cyclic prefix length M _CP .

In the above embodiment, the perception receiver receives the first information, determines the length of the cyclic prefix according to the first information, obtains the perception reference signal from the received OFDM symbol for perception according to the length of the cyclic prefix, and measures the perception reference signal, thereby completing wireless perception.

In combination with some embodiments of the second aspect, in some embodiments, the cyclic prefix length M _CP is positively correlated with the maximum perception distance within the perceived target range.

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

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.

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.

In combination 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 of the length of the OFDM symbol used for perception.

In conjunction with some embodiments of the second aspect, in some embodiments, 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.

In conjunction with some embodiments of the second aspect, in some embodiments, 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 _DFT of the OFDM symbol used for perception;

a cyclic prefix length ratio between the M _CP and the M _DFT ;

a cyclic prefix length ratio between the M _CP and the length of the OFDM symbol used for sensing;

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.

In a third aspect, an embodiment of the present disclosure provides a perception transmitter, including:

A processing module configured to determine a cyclic prefix length M _CP according to a perceived target range;

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 cyclic prefix with a length of M _CP .

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

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 _CP according to the first information;

The processing module is further configured to obtain a perception reference signal from the received OFDM symbol for perception according to the cyclic prefix length M _CP .

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.

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 manner of the second aspect.

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; 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.

In an eighth aspect, an embodiment of the present disclosure proposes a storage medium, which stores instructions. When the instructions are executed on 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.

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.

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.

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 of the embodiment of the present disclosure, or the method described in the second aspect or an optional implementation of the second aspect.

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

The embodiments of the present disclosure propose a perception method, a perception transmitter, a perception receiver and a system. In some embodiments, the perception transmitter can be replaced by a terminal, a network device, a first device, a perception transmitting end, a wireless transmitting end, etc., and the perception receiver can be replaced by a terminal, a network device, a second device, a perception receiving end, a wireless receiving end, etc.

The embodiments of the present disclosure are not exhaustive, but are only 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.

In each embodiment of the present disclosure, unless otherwise specified or there is a logical conflict, the terms and/or descriptions between the embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form a new embodiment based on their internal logical relationships.

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.

In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular form, such as "a", "an", "the", "above", "said", "aforementioned", "this", 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 after the article may be understood as a singular expression or a plural expression.

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

In some embodiments, terms such as "at least one of", "one or more", "a plurality of", "multiple" and the like can be used interchangeably.

In some embodiments, "at least one of A and B", "A and/or B", "A in one case, B in another case", "in response to one case A, in response to another case B", etc., may include the following technical solutions according to 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); in some embodiments, A and B (both A and B are executed). When there are more branches such as A, B, C, etc., the above is also similar.

In some embodiments, the recording method of "A or B" may include the following technical solutions according to 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). When there are more branches such as A, B, C, etc., the above is also similar.

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 restrictions on the position, order, priority, quantity or content of the description objects. The statement of the description object refers to the description in the context of the claims or embodiments, and should not constitute redundant restrictions 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", and the "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 the "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes may be the same or different. For example, if the description object is "device", then the "first device" and the "second device" may be the same device or different devices, and their types may be the same or different. For another example, if the description object is "information", then the "first information" and the "second information" may be the same information or different information, and their contents may be the same or different.

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.

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.

In some embodiments, the terms "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", "above" and the like can be used interchangeably, and "less than", "less than or equal to", "not greater than", "less than", The terms "less than or equal to", "no more than", "lower than", "lower than or equal to", "not higher than", "below" and the like are interchangeable.

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

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

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 (radio base station)", "fixed station" and in some embodiments may also be understood as "node", "access point (access point)", "transmission point (TP)", "reception point (RP)", "transmission and/or reception point (transmission/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 (bandwidth part, BWP)", etc.

In some embodiments, the term "terminal" or "terminal device" may be referred to as "user equipment (UE)", "user terminal (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.

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

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

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

Wireless communication and wireless perception are highly similar. Integrated Sensing And Communication (ISAC) can combine wireless communication and wireless perception, introduce close cooperation between the two, so that both wireless communication and wireless perception can benefit, which can not only improve the effectiveness and reliability of wireless communication, but also improve the accuracy of wireless perception. Moreover, devices that support both wireless communication and wireless perception can reduce network deployment costs.

In wireless sensing, it is usually necessary to estimate the distance, azimuth angle (such as horizontal angle and vertical angle) and speed of the sensing target. In a broad sense, sensing also includes wireless tracking and radio frequency identification of the sensing target. In order to achieve high-precision sensing, the sensing transmitter usually sends a special reference signal for sensing, which is referred to as the sensing reference signal below for ease of description. Optionally, the sensing reference signal may not carry information or data for communication.

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 .

In some embodiments, in a monostatic mode, the sensing transmitter 101 may send 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.

In some embodiments, in a bistatic mode, the sensing transmitter 101 may send a sensing reference signal, and the sensing receiver 102 may receive and measure the sensing reference signal, thereby estimating at least one of a distance, an angle, a speed, etc. of a sensing target.

It should be noted that the number of cognitive transmitters and the number of cognitive receivers shown in FIG1 are merely examples and do not constitute a limitation on the embodiments of the present disclosure. In actual situations, there may be one or more cognitive transmitters and one or more cognitive receivers.

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, and so on.

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

In some embodiments, the sensing receiver may be located in a terminal or a network device.

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

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

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

In one example, the perceptual transmitter and the perceptual receiver may be located at a terminal.

In some embodiments, the terminal may include a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer (Pad), a computer with wireless transceiver function, 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 at least one of a wireless terminal device in a smart home, but is not limited to these.

In some embodiments, the network device is, for example, an access network device, which may include an evolved Node B (eNB), a next generation evolved Node B (ng-eNB), a next generation Node B (gNB), a node B (NB), a home node B (HNB), a home evolved node B (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.

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.

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, wherein the parameter set includes parameters such as a sampling rate, a subcarrier bandwidth, a number of fast Fourier transform (FFT) points, and a length of a cyclic prefix used by the communication system. It should be noted that in the disclosed embodiment, the terms such as an OFDM symbol carrying a perception reference signal, an OFDM symbol used for perception, and an OFDM symbol for perception may be interchangeable. In the disclosed embodiment, the terms such as an OFDM symbol carrying a communication signal, an OFDM symbol used for communication, and an OFDM symbol for communication may be interchangeable, wherein 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, and 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.

FIG2a shows an exemplary schematic diagram of a plurality of OFDM symbols 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 FIG2a, the OFDM symbol used for sensing and the OFDM symbol used for communication adopt 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, and the length of the OFDM symbol is N _OFDM , N _OFDM =N _CP +N _FFT . The OFDM symbol used for sensing includes a cyclic prefix and a sensing reference signal, wherein the cyclic prefix is also represented by N _CP sampling points, the sensing reference signal is also represented by N _FFT sampling points, and the length of the OFDM symbol is the same as the length of the OFDM symbol used for communication, which is also N _OFDM .

In existing wireless communication systems, in order to avoid inter-symbol interference (ISI) and reduce the cyclic prefix overhead as much as possible, the length of the cyclic prefix in the OFDM symbol is generally equal to or slightly longer than the maximum multipath delay spread of the channel. As a result, sending OFDM symbols carrying sensing reference signals according to the parameter set used by the existing wireless communication system will greatly limit the sensing distance range without ISI.

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.

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.

Therefore, the embodiment of the present disclosure considers proposing a flexible OFDM symbol structure design. In the embodiment of the present disclosure, the OFDM symbol used for perception and the OFDM symbol used for communication can adopt different OFDM symbol structures, for example, the cyclic prefix length of the OFDM symbol used for perception can be different from the cyclic prefix length of the OFDM symbol used for communication. For the convenience of distinction, the cyclic prefix length of the OFDM symbol used for communication is recorded as N _CP , and the cyclic prefix length of the OFDM symbol used for perception is recorded as M _CP .

The main idea of the OFDM symbol structure design for perception proposed in the embodiment of the present disclosure is that each OFDM symbol structure for perception The length of the cyclic prefix of the symbol can be flexibly configured. It can be understood that each OFDM symbol used for perception includes a cyclic prefix and a perception reference signal. Optionally, the cyclic prefix is represented by M _CP sampling points, and the perception reference signal is represented by M _DFT sampling points.

In some embodiments, to ensure alignment with OFDM symbols used for communication, the length of each OFDM symbol used for sensing (including cyclic prefix) may be equal to the length of the OFDM symbol used for communication (including cyclic prefix). That is, M _CP +M _DFT =N _OFDM .

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

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 can be flexibly configured, wherein L is an integer greater than or equal to 1.

In some embodiments, in order to ensure alignment with the OFDM symbol used for communication, for a set of OFDM symbols used for sensing, the total length of L OFDM symbols used for sensing in the set (including the cyclic prefix) 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 . Wherein, M _CP +M _DFT may represent the length of a single OFDM symbol used for sensing, that is, M _CP +M _DFT =N _OFDM /L=(N _CP +N _FFT )/L.

According to the above embodiment, Fig. 2c shows an exemplary schematic diagram of multiple OFDM symbols continuous in the time domain when L>1 (eg, L=2). It can be understood that when L=1, multiple OFDM symbols continuous in the time domain can refer to the schematic diagram of Fig. 2b.

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 The length of the cyclic prefix is changed by scaling the discrete Fourier transform (DFT) length M _DFT .

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. N _OFDM =N _CP +N _FFT is the total number of sampling points contained in each OFDM symbol (including the cyclic prefix) used for communication.

According to the above embodiment, one or more sensing OFDM symbols may be sent within the time of one communication OFDM symbol. For example, when it is necessary to sense a target at a relatively close distance, it is not necessary to set an excessively long cyclic prefix, and then it may be considered to send two sensing OFDM symbols continuously, which is equivalent to sending two sensing reference signals within the time of one communication OFDM symbol, thereby performing two sensing measurements for the sensing target at a close distance, which is beneficial to improving the accuracy of sensing and making sensing more flexible.

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

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

In some embodiments, the perceived target range 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 _CP is determined according to the perceived target range. In some embodiments, the cyclic prefix length M _CP can be represented by the number of sampling points included in the cyclic prefix, or can also be represented by the time length of the cyclic prefix.

In some embodiments, the cyclic prefix length M _CP is determined according to the maximum perceived distance within the perceived target range.

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

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

It can be seen 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, so that targets at a farther distance can be perceived.

In some embodiments, the maximum perception distance d _Max without ISI is greater than or equal to the maximum perception distance within the target range.

In some embodiments, the required cyclic prefix length M _CP may be determined based on d _Max that is greater than or equal to the maximum perception distance within the target range and according to a preset relationship (eg, one of the above relationships) satisfied between M _CP and d _Max .

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

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

In some embodiments, the first information is used to indicate a cyclic prefix length M _CP .

In some embodiments, the first information indicates the cyclic prefix length M _CP , and may directly indicate the cyclic prefix length M _CP , for example, The first information includes a cyclic prefix length M _CP .

In some embodiments, the first information indicates the cyclic prefix length M _CP , and may indirectly indicate the cyclic prefix length M _CP . For example, the first information includes other parameters, and the other parameters may 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 _CP may be determined according to the candidate value indicated by the first indication information.

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

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

(a) The number of OFDM symbols used for sensing: L.

(b) Cyclic prefix length for perceived OFDM symbols: M _CP .

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

Optionally, the DFT length may be alternatively described as the number of DFT points, the DFT size, etc.

Optionally, the DFT length/number of points/size can be replaced by the inverse discrete Fourier transform (IDFT) length/number of points/size, etc.

(d) Cyclic prefix length ratio between cyclic prefix length M _CP and discrete Fourier transform length M _DFT :

(e) Cyclic prefix length ratio between M _CP and the length of the OFDM symbol used for perception: or

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

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

(g) The 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:

Wherein, Δf ^(sensing) is the subcarrier bandwidth of the OFDM symbol used for sensing, and Δf ^(comm) is the subcarrier bandwidth of the OFDM symbol used for communication.

(h) The first index μ _sensing represents the logarithmic result of the subcarrier bandwidth ratio, e.g.

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 that uses a parameter set used for communication as a reference, etc.

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

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 perception receiver via the DCI. Optionally, the first information is sent to the perception receiver via an RRC message.

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

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

In one example, the cyclic prefix length is For example, the sensing transmitter configures the cyclic prefix length ratio in the sensing receiver through the RRC message The candidate value set includes

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

Table 1

In some embodiments, a candidate value set of at least one of the above parameters (a) to (h) can be configured in the perception receiver through 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 through a MAC CE message, and one of the activated candidate values of the parameter can be indicated through a DCI. Optionally, one or more candidate values in the candidate value set of the parameter can also be deactivated through a MAC CE message.

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

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

In some embodiments, the sensing receiver determines a cyclic prefix length M _CP and a DFT length M _DFT of an OFDM symbol to be sensed according to the first information.

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

Step S3104: the sensing transmitter sends an OFDM symbol for sensing.

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 cyclic prefix with a length of M _CP . Optionally, the cyclic prefix is represented by M _CP sampling points, and the sensing reference signal is represented by M _DFT sampling points. Wherein, L is an integer greater than or equal to 1.

In some embodiments, the OFDM symbol used for sensing also includes empty resource elements, which depends 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.

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 first sequence with a length of M _DFT according to its pattern, performing an inverse discrete Fourier transform (IDFT) of the M _DFT points on the first sequence to obtain a second sequence, inserting the last M _CP sampling points of the second sequence as a cyclic prefix into the head of the second sequence to obtain a third sequence, and sending the third sequence.

Step S3105: The perception receiver obtains a perception reference signal from the received OFDM symbol for perception according to the cyclic prefix length.

In some embodiments, the sensing receiver receives OFDM symbols for sensing, obtains a sensing reference signal from the received OFDM symbols for sensing according to a cyclic prefix length M _CP , and measures the sensing reference signal, thereby achieving wireless sensing.

In some embodiments, a sensing receiver receives L OFDM symbols for sensing, obtains a sensing reference signal from each received OFDM symbol for sensing according to a cyclic prefix length M _CP , and measures the sensing reference signal, thereby realizing wireless sensing. For each OFDM symbol for sensing, the cyclic prefix is removed from the OFDM symbol, and then a discrete Fourier transform (DFT) of M _DFT points is performed, thereby obtaining a sensing reference signal.

According to the above embodiment, the sensing transmitter can flexibly adjust the length M _CP or ratio of the cyclic prefix in the OFDM symbol according to the sensing target range. or or ), which is conducive to expanding the distance perception range without ISI. In addition, the perception system and the wireless communication system do not interfere with each other, and can ensure symbol-level alignment with the wireless communication system, which is completely transparent to the wireless communication system.

The perception method involved in the embodiment of the present disclosure may include at least one of step S3101 to step S3105. For example, step S3101 may be implemented as an independent embodiment, step S3101+step S3104 may be implemented as an independent embodiment, step S3101+step S3102+step S3104 may be implemented as an independent embodiment, and step S3103+step S3105 may be implemented as an independent embodiment, but is not limited thereto.

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.

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:

Step S4101, determining a cyclic prefix length according to a perceived target range.

In some embodiments, the cyclic prefix length M _CP is determined according to the maximum perceived distance within the perceived target range.

In some embodiments, the cyclic prefix length M _CP is positively correlated with the maximum sensing distance within the sensed target range.

The optional implementation of step S4101 can refer to the optional implementation of step S3101 in FIG. 3 and other related parts in the embodiment involved in FIG. 3 , which will not be described in detail here.

Step S4102: Send first information to the perception receiver.

In some embodiments, the first information is used to indicate a cyclic prefix length M _CP .

In some embodiments, the first information indicates the cyclic prefix length M _CP , and may directly indicate the cyclic prefix length M _CP . For example, the first information includes the cyclic prefix length M _CP .

In some embodiments, the first information indicates the cyclic prefix length M _CP , and may indirectly indicate the cyclic prefix length M _CP . For example, the first information includes other parameters, and the other parameters may 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 _CP may be determined according to the candidate value indicated by the first indication information.

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

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

The optional implementation of step S4102 can refer to the optional implementation of step S3102 in FIG. 3 and other related parts in the embodiment involved in FIG. 3 , which will not be described in detail here.

Step S4103, sending OFDM symbols for sensing.

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.

The optional implementation of step S4103 can refer to the optional implementation of step S3104 in FIG. 3 and other related parts in the embodiment involved in FIG. 3 , which will not be described in detail here.

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 the first information to the perception receiver, thereby notifying 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.

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:

Step S4201, determining a cyclic prefix length according to a perceived target range.

In some embodiments, the cyclic prefix length M _CP is determined according to the maximum perceived distance within the perceived target range.

In some embodiments, the cyclic prefix length M _CP is positively correlated with the maximum sensing distance within the sensed target range.

The optional implementation of step S4201 can refer to the optional implementation of step S3101 in FIG. 3 and other related parts in the embodiment involved in FIG. 3 , which will not be described in detail here.

Step S4202, sending OFDM symbols for sensing.

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.

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

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

The optional implementation of step S4202 can refer to the optional implementation of step S3104 in FIG. 3 and other related parts in the embodiment involved in FIG. 3 , which will not be described in detail here.

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

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.

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:

Step S5101, receiving first information sent by a sensing transmitter.

In some embodiments, the first information is used to indicate a cyclic prefix length M _CP .

In some embodiments, the first information indicates the cyclic prefix length M _CP , and may directly indicate the cyclic prefix length M _CP . For example, the first information includes the cyclic prefix length M _CP .

In some embodiments, the first information indicates the cyclic prefix length M _CP , and may indirectly indicate the cyclic prefix length M _CP . For example, the first information includes other parameters, and the other parameters may 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 candidate value indicated by the first indication information is determined. The value determines the cyclic prefix length M _CP .

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

In some embodiments, the first information sent by the sensing transmitter can be received via an RRC message.

The optional implementation of step S5101 can refer to the optional implementation of step S3102 in FIG. 3 and other related parts in the embodiment involved in FIG. 3 , which will not be described in detail here.

Step S5102: determine the cyclic prefix length according to the first information.

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

Exemplarily, the first information includes the number L of OFDM symbols used for perception and the cyclic prefix length ratio Since the length N _OFDM of the OFDM symbol used for communication is known, the cyclic prefix length M _CP and the DFT length M _DFT can be determined according to the length relationship between L OFDM symbols used for perception and OFDM symbols used for communication (M _CP +M _DFT )·L=N _OFDM .

Step S5103: obtaining a perception reference signal from the received OFDM symbol for perception according to the cyclic prefix length.

In some embodiments, the sensing receiver receives OFDM symbols for sensing, obtains a sensing reference signal from the received OFDM symbols for sensing according to a cyclic prefix length M _CP , and measures the sensing reference signal, thereby achieving wireless sensing.

In some embodiments, a sensing receiver receives L OFDM symbols for sensing, obtains a sensing reference signal from each received OFDM symbol for sensing according to a cyclic prefix length M _CP , and measures the sensing reference signal, thereby realizing wireless sensing. For each OFDM symbol for sensing, the cyclic prefix is removed from the OFDM symbol, and then a discrete Fourier transform (DFT) of M _DFT points is performed, thereby obtaining a sensing reference signal.

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 used for perception based on the length of the cyclic prefix, and measure the perception reference signal, thereby completing wireless perception.

The embodiments of the present disclosure also propose a device for implementing any of the above methods, for example, a device is proposed, the above device includes a unit or module for implementing each step performed by the sensing transmitter in any of the above methods. For another example, another device is also proposed, including a unit or module for implementing each step performed by the sensing receiver in any of the above methods.

It should be understood that the division of the units or modules in the above device is only a division of logical functions, which can be fully or partially integrated into one physical entity or physically separated in actual implementation. In addition, the units or modules in the device can be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, instructions are stored in the memory, and the processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the 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 inside the device or a memory outside the device. Alternatively, the units or modules in the device may be implemented in the form of hardware circuits, and the functions of some or all of the units or modules may be implemented by designing the hardware circuits. The hardware circuits may be understood as one or more processors; for example, in one implementation, the hardware circuits are application-specific integrated circuits (ASICs), and the functions of some or all of the above units or modules may be implemented by designing the logical relationship of the components in the circuits; for another example, in another implementation, the hardware circuits may be implemented by programmable logic devices (PLDs), and Field Programmable Gate Arrays (FPGAs) may be used as an example, which may include a large number of logic gate circuits, and the connection relationship between the logic gate circuits may be configured by configuring the configuration files, thereby implementing the functions of some or all of the above units or modules. All units or modules of the above devices may be implemented in the form of software called by the processor, or in the form of hardware circuits, or in the form of software called by the processor, and the remaining part may be implemented in the form of hardware circuits.

In the disclosed embodiments, the processor is a circuit with signal processing capability. In one implementation, the processor may be a circuit with instruction reading and execution capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which may be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor may implement certain functions through the logical relationship of a hardware circuit, and the logical relationship of the above hardware circuit may be fixed or reconfigurable, such as 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 to implement the hardware circuit configuration may 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 ASIC, such as Neural Network Processing Unit (NPU), Tensor Processing Unit (TPU), Deep Learning Processing Unit (DPU), etc.

FIG6a is a schematic diagram of the structure of the perception transmitter proposed in an embodiment of the present disclosure. As shown in FIG6a, the perception transmitter 6100 may include: at least one of a transceiver module 6101 and a processing module 6102. In some embodiments, the processing module is used to determine the cyclic prefix length according to the target range of perception. The transceiver module is used to send OFDM symbols for perception. Optionally, the transceiver module is used to perform the communication steps such as sending and/or receiving performed by the perception transmitter in any of the above methods (for example, step S3102, step S3103, step S3104, etc.). Optionally, the processing module is used to execute at least one of the other steps (such as step S3101, but not limited thereto) performed by the sensing transmitter in any of the above methods, which will not be described in detail here.

FIG6b is a schematic diagram of the structure of the perceptual receiver proposed in an embodiment of the present disclosure. As shown in FIG6b , the perceptual 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 perceptual transmitter. The processing module is used to determine the cyclic prefix length according to the first information. The processing module is used to obtain a perceptual reference signal from the received OFDM symbol for perception according to the cyclic prefix length. Optionally, the transceiver module is used to execute at least one of the communication steps such as sending and/or receiving executed by the perceptual receiver in any of the above methods, which will not be described in detail here. Optionally, the processing module is used to execute at least one of the other steps (such as step S3103, step S3105, but not limited to this) executed by the perceptual receiver in any of the above methods, which will not be described in detail here.

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

In some embodiments, the processing module can be a module or 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 replaced with the processor.

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 may be a network device (e.g., an access network device, etc.), or a terminal (e.g., a user device, etc.), or a chip, a chip system, or a processor, etc. that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor, etc. that supports a terminal to implement any of the above methods. The communication device 7100 may be used to implement the method described in the above method embodiment, and specific details may be referred to the description in the above method embodiment. In some embodiments, the communication device 7100 may implement the method described in the above method embodiment for application to a perceptual transmitter. In some embodiments, the communication device 7100 may implement the method described in the above method embodiment for application to a perceptual receiver.

As shown in FIG. 7a , the communication device 7100 includes one or more processors 7101. The processor 7101 may be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor may be used to process the communication protocol and the communication data, and the central processing unit may be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute a program, and process the data of the program. The communication device 7100 is used to execute any of the above methods.

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

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, step S3104, but not limited thereto), and the processor 7101 performs at least one of the other steps (for example, step S3101, step S3103, step S3105, but not limited thereto).

In some embodiments, the transceiver may include a receiver and/or a transmitter, and the receiver and the transmitter may be separate or integrated. Optionally, the terms such as transceiver, transceiver unit, transceiver, transceiver circuit, etc. may be replaced with each other, the terms such as transmitter, transmission unit, transmitter, transmission circuit, etc. may be replaced with each other, and the terms such as receiver, receiving unit, receiver, receiving circuit, etc. may be replaced with each other.

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

The communication device 7100 described in the above embodiments 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 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, a vehicle-mounted device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

Fig. 7b is a schematic diagram of the structure of a chip 7200 provided in an embodiment of the present disclosure. In the case where the communication device 7100 may be a chip or a chip system, reference may be made to the schematic diagram of the structure of the chip 7200 shown in Fig. 7b, but the present invention is not limited thereto.

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

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, and the interface circuit 7202 can be used to receive signals from the memory 7203 or other devices, and the interface circuit 7202 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.

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 this), and the processor 7201 executes at least one of the other steps (for example, step S3101, step S3103, step S3105, but not limited to this).

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

In some embodiments, the chip 7200 further includes one or more memories 7203 for storing instructions. Optionally, all or part of the memory 7203 may be outside the chip 7200.

The present disclosure also proposes a storage medium, on which instructions are stored, and 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 to this, and it can also be a storage medium readable by other devices. Optionally, the storage medium can be a non-transitory storage medium, but is not limited to this, and it can also be a temporary storage medium.

The present disclosure also proposes a program product, which, when executed by the communication device 7100, enables the communication device 7100 to execute any of the above methods. Optionally, the program product is a computer program product.

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

Claims (22)

A sensing method, characterized in that it is performed by a sensing transmitter, and the method comprises: Determine the cyclic prefix length M _CP according to the perceived target range; An orthogonal frequency division multiplexing (OFDM) symbol for sensing is transmitted, wherein the OFDM symbol for sensing includes a sensing reference signal and a cyclic prefix with a length of M _CP . The method according to claim 1 is characterized in that the M _CP is positively correlated with the maximum perception distance within the perceived target range. The method according to claim 1 or 2, characterized in that the sending of OFDM symbols for sensing comprises: 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. The method according to claim 3 is characterized in that the total length of the L OFDM symbols used for perception is equal to the length of the OFDM symbol used for communication. The method according to any one of claims 1 to 4 is characterized in that the M _CP is greater than zero and is less than or equal to half the length of the OFDM symbol used for perception. The method according to any one of claims 1 to 5, characterized in that the method further comprises: A perception reference signal is obtained from the OFDM symbol used for perception according to the M _CP . The method according to any one of claims 1 to 5, characterized in that the method further comprises: First information is sent to a perceptual receiver, where the first information includes the M _CP , or the first information is used to determine the M _CP . The method according to claim 7, wherein sending the first information to the perceptual receiver comprises: 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. 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 _DFT of the OFDM symbol used for perception; a cyclic prefix length ratio between the M _CP and the M _DFT ; a cyclic prefix length ratio between the M _CP and the length of the OFDM symbol used for sensing; 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. A perception method, characterized in that it is performed by a perception receiver, the method comprising: receiving first information sent by a sensing transmitter; Determine a cyclic prefix length M _CP according to the first information; A perception reference signal is obtained from the received OFDM symbol for perception according to the M _CP . The method according to claim 10 is characterized in that the M _CP is positively correlated with the maximum perception distance within the perceived target range. 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. The method according to claim 12, characterized in that the total length of the L OFDM symbols used for perception is The OFDM symbols used for communication are equal in length. 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 the length of the OFDM symbol used for perception. The method according to any one of claims 10 to 14, characterized in that the receiving sensing the first information sent by the transmitter comprises: 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. 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 _DFT of the OFDM symbol used for perception; a cyclic prefix length ratio between the M _CP and the M _DFT ; a cyclic prefix length ratio between the M _CP and the length of the OFDM symbol used for sensing; 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. A perceptual transmitter, characterized in that it comprises: A processing module configured to determine a cyclic prefix length M _CP according to a perceived target range; 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 cyclic prefix with a length of M _CP . A perceptual receiver, comprising: 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 _CP according to the first information; The processing module is further configured to obtain a perception reference signal from the received OFDM symbol for perception according to the M _CP . A sensing device, characterized by comprising: one or more processors; Wherein, the sensing device is used to execute the sensing method described in any one of claims 1-9. A sensing device, characterized by comprising: one or more processors; Wherein, the sensing device is used to execute the sensing method described in any one of claims 10-16. A sensing system, characterized by comprising: 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. A storage medium storing instructions, characterized in that when the instructions are executed on a communication device, the communication device executes the perception method as described in any one of claims 1-9 or 10-16.