Communication method, apparatus and system

Abstract

A communication method, an apparatus and a system, which relate to the field of communications, and which are used for solving the problem of stationary or low-speed targets being unable to be sensed. The method comprises: a first device acquires a first time domain resource comprising M time domain symbols, and sends a first signal on the M time domain symbols, wherein M is an integer greater than 1; an interval between any two of the M time domain symbols is greater than or equal to one time domain symbol; the first signal sent on a time domain symbol a amongst the M time domain symbols is a product of a second signal and an element a in a scrambling code sequence; the time domain symbol a is a time domain symbol having an index being a amongst the M time domain symbols; the element a in the scrambling code sequence is an element having an index being a in the scrambling code sequence; a is an integer greater than or equal to 0, and a is an integer less than M; the length of the scrambling code sequence is M, and the scrambling code sequence is obtained on the basis of a constant amplitude zero correlation sequence. The solution of the present application can be widely applied to the technical fields of communications, artificial intelligence, Internet of Vehicles, smart home networking, etc.

Description

A communication method, apparatus, and system

[0001] The present application claims priority from the Chinese patent application No. 202411093254.2 filed on August 8, 2024, and entitled "A communication method, apparatus, and system", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication, and in particular to a communication method, apparatus, and system. BACKGROUND

[0003] Integrated sensing and communication (ISAC), also known as integrated sensing and communication, refers to a communication device, such as a network device or a terminal, which has not only communication capability but also sensing capability, and can realize positioning, detection, imaging, and identification of a sensed target based on various propagation characteristics of wireless signals.

[0004] In a networking scenario, all base stations use the same time-frequency resources for sensing. Taking a certain base station A for sensing as an example, it is assumed that base station A performs sensing by transmitting a sensing signal and receiving a reflected echo signal from a sensed target, and performs sensing on the sensed target. Since all base stations use the same time-frequency resources for sensing, base station A will also receive sensing signals (i.e., inter-base station interference signals) transmitted by other devices (such as other base stations, terminals, etc.) and noise signals. In addition, since each base station transmits the same sensing signal within the coherent processing time, the sensing signal (i.e., inter-base station interference signal) received by base station A from other devices is also almost unchanged, resulting in that a stationary or low-speed sensing target is obscured by the interference signal and cannot be sensed. SUMMARY

[0005] The embodiments of the present application provide a communication method, apparatus, and system to solve the problem that a stationary or low-speed sensed target cannot be sensed.

[0006] To achieve the above object, the present application adopts the following technical solutions:

[0007] In a first aspect, an embodiment of the present application provides a communication method, which can be executed by a first device, the first device can be a first device or a functional module or a chip in the first device, and the method comprises: the first device acquires a first time domain resource comprising M time domain symbols, and transmits a first signal on the M time domain symbols. Wherein, M is an integer greater than 1; the interval between any two time domain symbols in the M time domain symbols is greater than or equal to 1 time domain symbol; the first signal transmitted on a time domain symbol a in the M time domain symbols is the product of a second signal and an element a in a scrambling sequence; the element a in the scrambling sequence is the element with index a in the scrambling sequence; a is an integer greater than or equal to 0, and a is an integer less than M; the length of the scrambling sequence is equal to M, and the scrambling sequence is obtained according to a constant modulus zero correlation sequence.

[0008] Based on the method in the first aspect, the first signal transmitted by the first device on the M time domain symbols of the first time domain resource is obtained by scrambling the second signal using the scrambling sequence, so that after the device receiving the echo signal of the first signal coherently accumulates all the signals received in the coherent processing time, because the constant modulus zero correlation sequence used by other devices is irrelevant to the constant modulus zero correlation sequence used by the first device, that is, the first signal (i.e. the inter-base station interference signal of the first device) transmitted by other devices and the first signal transmitted by the first device are orthogonal to each other, so that the inter-base station interference signal is located at the medium and high frequencies in the Doppler dimension, and is no longer located at the zero frequency or low frequency, so that the static or low-speed target is no longer obscured by the inter-base station interference signal, thereby realizing effective perception of the static or low-speed target.

[0009] In a possible design, the scrambling sequence is obtained according to the constant modulus zero correlation sequence, comprising: the scrambling sequence is a sequence obtained by cyclically shifting the constant modulus zero correlation sequence to the right or to the left by m bits; m is an integer greater than or equal to 0, and m is an integer less than or equal to M-1.

[0010] Based on the possible design, the first device can obtain the scrambling sequence by cyclically shifting the constant modulus zero correlation sequence, thereby providing an explicit implementation manner for the first device to obtain the scrambling sequence according to the constant modulus zero correlation sequence.

[0011] In a possible design, the constant modulus zero correlation sequence comprises a Zadoff-Chu sequence. Based on the possible design, the first device can obtain the scrambling sequence according to the Zadoff-Chu sequence under the constant modulus zero correlation sequence, thereby increasing the manner for the first device to obtain the scrambling sequence.

[0012] In a possible design, the element a[n] with index n in the constant modulus zero correlation sequence {a[n]} satisfies:

[0013] wherein a, b, g are parameters of the constant modulus zero correlation sequence, the greatest common divisor of 2a and M is 1, and aM+b is an integer.

[0014] Based on the possible design, a constraint / condition that the parameters a, b, g of the constant modulus zero correlation sequence need to satisfy is provided, so that the first device can obtain the element a[n] with index n in the constant modulus zero correlation sequence {a[n]} when the parameters a, b, g of the constant modulus zero correlation sequence satisfy the constraint / condition.

[0015] In a possible design, the constant modulus zero correlation sequence includes a Zadoff-Chu sequence, and the element d[n] with index n in the Zadoff-Chu sequence {d[n]} satisfies:

[0016] wherein u is a parameter of the Zadoff-Chu sequence, the greatest common divisor of u and M is 1, u is an integer greater than or equal to 1, and u is an integer less than or equal to M-1.

[0017] Based on the possible design, a constraint / condition that the parameter u of the Zadoff-Chu sequence needs to satisfy is provided, so that the first device can obtain the element d[n] with index n in the Zadoff-Chu sequence {d[n]} when the parameter u of the Zadoff-Chu sequence satisfies the constraint / condition.

[0018] In a possible design, the first device transmits the second signal in a second time domain resource, and the first time domain resource and the second time domain resource do not overlap. Based on the possible design, the first device transmits different signals using different time domain resources, that is, the first device transmits the first signal and the second signal in a time division multiplexing manner, so that the first device can detect a zero-speed or low-speed target based on the first signal and a high-speed target based on the second signal.

[0019] In a possible design, the first device transmits the first signal in M time domain symbols, including: transmitting the first signal in a first frequency domain resource and in the M time domain symbols; and transmitting the second signal in a second frequency domain resource and in the M time domain symbols; and the first frequency domain resource and the second frequency domain resource do not overlap.

[0020] Based on the possible design, the first device transmits different signals using different frequency domain resources, that is, the first device transmits the first signal and the second signal in a frequency division multiplexing manner, so that the first device can detect a zero-speed or low-speed target based on the first signal and a high-speed target based on the second signal.

[0021] In one possible design, the first device receives echo signals of the first signal on M time-domain symbols; and / or, receives echo signals of the second signal on the second time-domain resource; and / or, receives echo signals of the first signal on the first frequency-domain resource and on the M time-domain symbols; and / or, receives echo signals of the second signal on the second frequency-domain resource and on the M time-domain symbols.

[0022] Based on this possible design, the first device can receive echo signals of the first signal and / or echo signals of the second signal on different time-domain resources and / or frequency-domain resources to effectively sense the target after coherently accumulating the received signals.

[0023] In one possible design, the second signal is an orthogonal frequency division multiplexing (OFDM) signal or a discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) signal generated based on a specific sequence, where the specific sequence includes any one of a Zadoff-Chu sequence, a pseudo-random sequence, a predefined sequence, and a complex sequence based on quadrature amplitude modulation (QAM), and the pseudo-random sequence includes a GOLD sequence and a maximum length linear feedback shift register (m) sequence.

[0024] Based on this possible design, the first device can generate the second signal based on multiple sequences, which improves flexibility of the first device in generating the second signal.

[0025] In one possible design, the first device transmits first information, where the first information is used to indicate at least one of the following: M, a cyclic shift value m, a parameter of a constant amplitude zero correlation sequence, a first time-domain resource, a parameter of the second signal, a first frequency-domain resource, a second frequency-domain resource, and a second time-domain resource; the first frequency-domain resource is used to transmit the first signal; the second frequency-domain resource is used to transmit the second signal; and the second time-domain resource is used to transmit the second signal.

[0026] Based on this possible design, a device (e.g., the second device) that receives the first information can obtain at least one of the following based on the first information: M, the cyclic shift value m, the parameter of the constant amplitude zero correlation sequence, the first time-domain resource, the parameter of the second signal, the first frequency-domain resource, the second frequency-domain resource, and the second time-domain resource.

[0027] In one possible design, the first device transmits second information, where the second information is used to indicate a first time unit in which the M time-domain symbols are located. Based on this possible design, a device (e.g., the second device) that receives the second information can obtain the first time unit in which the M time-domain symbols are located based on the indication of the second information, to accurately receive the first signal carried on the M time-domain symbols.

[0028] In a possible design, the interval between any two adjacent time domain symbols in the M time domain symbols included in the first time domain resource is the same. Based on the possible design, after the first device obtains the position of any time domain symbol in the M time domain symbols, the position of any time domain symbol in the M time domain symbols can be obtained through the interval between any two adjacent time domain symbols in the M time domain symbols.

[0029] In a second aspect, an embodiment of the present application provides a communication method, which can be executed by a second device, the second device can be a second device or a functional module or a chip in the second device, and is taken as an example, the method comprises the following steps: the second device receives first information used for indicating a first time domain resource, the first time domain resource comprises M time domain symbols, and a first signal is received on the M time domain symbols. Wherein, M is an integer greater than 1; the interval between any two time domain symbols in the M time domain symbols is greater than or equal to 1 time domain symbol; the first signal received on a time domain symbol a in the M time domain symbols is the product of a second signal and an element a in a scrambling sequence; the time domain symbol a is a time domain symbol with an index a in the M time domain symbols; the element a in the scrambling sequence is an element with an index a in the scrambling sequence; a is an integer greater than or equal to 0, and a is an integer less than M; the length of the scrambling sequence is equal to M, and the scrambling sequence is obtained according to a constant modulus zero correlation sequence.

[0030] Based on the method in the second aspect, the second device can obtain the first time domain resource comprising M time domain symbols through the first information, and receive the first signal on the M time domain symbols, so that the second device can evaluate a channel for transmitting the first signal according to the first signal received on the M time domain symbols.

[0031] In a possible design, the scrambling sequence is obtained according to the constant modulus zero correlation sequence, comprising: the scrambling sequence is a sequence obtained by cyclically shifting the constant modulus zero correlation sequence rightward or leftward by m bits; m is an integer greater than or equal to 0, and m is an integer less than or equal to M-1.

[0032] Based on the possible design, the second device can obtain the scrambling sequence by cyclically shifting the constant modulus zero correlation sequence, which provides an explicit implementation manner for the second device to obtain the scrambling sequence according to the constant modulus zero correlation sequence.

[0033] In a possible design, the constant modulus zero correlation sequence comprises a Zadoff-Chu sequence. Based on the possible design, the second device can obtain the scrambling sequence according to the Zadoff-Chu sequence under the constant modulus zero correlation sequence, which increases the manner for the second device to obtain the scrambling sequence.

[0034] In a possible design, an element a[n] with an index n in the constant modulus zero correlation sequence {a[n]} satisfies:

[0035] wherein a, b, g are parameters of the constant modulus zero correlation sequence, the greatest common divisor of 2a and M is 1, and aM+b is an integer.

[0036] Based on the possible design, a constraint / condition that the parameters a, b, g of the constant modulus zero correlation sequence need to satisfy is provided, so that the second device can obtain the element a[n] with index n in the constant modulus zero correlation sequence {a[n]} when the parameters a, b, g of the constant modulus zero correlation sequence satisfy the constraint / condition.

[0037] In a possible design, the constant modulus zero correlation sequence includes a Zadoff-Chu sequence, and the element d[n] with index n in the Zadoff-Chu sequence {d[n]} satisfies:

[0038] wherein u is a parameter of the Zadoff-Chu sequence, the greatest common divisor of u and M is 1, u is an integer greater than or equal to 1, and u is an integer less than or equal to M-1.

[0039] Based on the possible design, a constraint / condition that the parameter u of the Zadoff-Chu sequence needs to satisfy is provided, so that the second device can obtain the element d[n] with index n in the Zadoff-Chu sequence {d[n]} when the parameter u of the Zadoff-Chu sequence satisfies the constraint / condition.

[0040] In a possible design, the second device receives the second signal in the second time domain resource, and the first time domain resource and the second time domain resource do not overlap. Based on the possible design, the second device can receive different signals using different time domain resources, that is, the second device receives the first signal and the second signal in a time division multiplexing manner.

[0041] In a possible design, the second device receives the first signal in M time domain symbols, including: receiving the first signal in the first frequency domain resource and in the M time domain symbols; and receiving the second signal in the second frequency domain resource and in the M time domain symbols; the first frequency domain resource and the second frequency domain resource do not overlap.

[0042] Based on the possible design, the second device receives different signals using different frequency domain resources, that is, the second device receives the first signal and the second signal in a frequency division multiplexing manner.

[0043] In a possible design, the second signal is an orthogonal frequency division multiplexing (OFDM) signal or a discrete Fourier transform-spread-OFDM (DFT-s-OFDM) signal generated based on a specific sequence; the specific sequence includes any one of a Zadoff-Chu sequence, a pseudo-random sequence, a predefined sequence, and a complex sequence based on quadrature amplitude modulation (QAM); and the pseudo-random sequence includes a GOLD sequence and a maximum length linear feedback shift register (m) sequence.

[0044] Based on the possible design, the first device can generate the second signal based on multiple sequences, thereby improving flexibility of the first device in generating the second signal.

[0045] In a possible design, the first information further indicates at least one of the following: the M, the cyclic shift value m, a parameter of the constant amplitude zero correlation sequence, a parameter of the second signal, a first frequency domain resource, a second frequency domain resource, and a second time domain resource; the first frequency domain resource is used to receive the first signal; the second frequency domain resource is used to receive the second signal; and the second time domain resource is used to receive the second signal.

[0046] Based on the possible design, the second device can obtain at least one of the M, the cyclic shift value m, a parameter of the constant amplitude zero correlation sequence, a parameter of the second signal, a first frequency domain resource, a second frequency domain resource, and a second time domain resource based on the first information, to determine the relevant information of the first signal and / or the second signal according to the information indicated by the first information.

[0047] In a possible design, the second device receives second information, and the second information is used to indicate a first time unit in which the M time domain symbols are located. Based on the possible design, the second device can obtain the first time unit in which the M time domain symbols are located based on the indication of the second information, to accurately receive the first signal carried on the M time domain symbols.

[0048] In a possible design, the interval between any two adjacent time domain symbols included in the M time domain symbols in the first time domain resource is the same. Based on the possible design, after the second device obtains the position of any time domain symbol in the M time domain symbols, the second device can obtain the position of any time domain symbol in the M time domain symbols based on the interval between any two adjacent time domain symbols in the M time domain symbols.

[0049] In a third aspect, the present application provides a communication apparatus, which can be the first device or a chip or system on chip in the first device, or a functional module in the first device for implementing the method in the first aspect or any possible design of the first aspect. The communication apparatus can implement the functions of the first device in the first aspect or any possible design of the first aspect, which can be implemented by hardware or software. The hardware or software includes one or more modules corresponding to the functions. For example, the communication apparatus can include a transceiver and a processing unit. Wherein,

[0050] The processing unit is configured to obtain a first time domain resource, the first time domain resource including M time domain symbols, M being an integer greater than 1, and an interval between any two time domain symbols in the M time domain symbols being greater than or equal to 1 time domain symbol.

[0051] The transceiver is configured to transmit a first signal on the M time domain symbols, and the first signal transmitted on a time domain symbol a in the M time domain symbols being a product of a second signal and an element a in a scrambling sequence, the time domain symbol a being a time domain symbol with an index a in the M time domain symbols, the element a in the scrambling sequence being an element with an index a in the scrambling sequence, a being an integer greater than or equal to 0 and smaller than M, and a length of the scrambling sequence being equal to M, the scrambling sequence being obtained according to a constant modulus zero correlation sequence.

[0052] Specifically, the execution actions of each unit of the communication apparatus can refer to those of the first aspect or any possible design of the first aspect, and will not be repeated here.

[0053] In a fourth aspect, the present application provides a communication apparatus, which can be the second device or a chip or system on chip in the second device, or a functional module in the second device for implementing the method in the second aspect or any possible design of the second aspect. The communication apparatus can implement the functions of the second device in the second aspect or any possible design of the second aspect, which can be implemented by hardware or software. The hardware or software includes one or more modules corresponding to the functions. For example, the communication apparatus can include a transceiver. Wherein,

[0054] The transceiver is configured to receive first information, the first information being used to indicate a first time domain resource, the first time domain resource including M time domain symbols, M being an integer greater than 1, and an interval between any two time domain symbols in the M time domain symbols being greater than or equal to 1 time domain symbol.

[0055] The transceiver unit is further configured to receive the first signal on M time domain symbols, wherein the first signal received on a time domain symbol a of the M time domain symbols is a product of the second signal and an element a of the scrambling sequence, the time domain symbol a is a time domain symbol with index a of the M time domain symbols, the element a of the scrambling sequence is an element with index a of the scrambling sequence, a is an integer greater than or equal to 0, and a is an integer less than M, a length of the scrambling sequence is equal to M, and the scrambling sequence is obtained according to a constant modulus zero correlation sequence.

[0056] Specifically, the execution actions of each unit of the communication apparatus can refer to those described in the second aspect or any possible design of the second aspect, and will not be described here.

[0057] In a fifth aspect, a communication apparatus is provided. The communication apparatus can be the first device or the second device. In one possible design of the communication apparatus, the communication apparatus includes a processor. The processor is configured to support the communication apparatus to perform the communication method in the first aspect or any possible design of the first aspect, or the processor is configured to support the communication apparatus to perform the communication method in the second aspect or any possible design of the second aspect. In another possible design of the communication apparatus, the communication apparatus can further include a memory. The memory is configured to store instructions and / or data. When the communication apparatus is running, the processor executes the computer-executable instructions stored in the memory, so that the communication apparatus performs the communication method in the first aspect or any possible design of the first aspect, or performs the communication method in the second aspect or any possible design of the second aspect.

[0058] In a sixth aspect, a communication system is provided. The communication system includes the communication apparatus in the third aspect and / or the communication apparatus in the fourth aspect.

[0059] In a seventh aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores computer instructions. When the computer instructions are executed on a computer, the computer instructions cause the computer to perform the communication method in the first aspect or any possible design of the first aspect, or cause the computer to perform the communication method in the second aspect or any possible design of the second aspect.

[0060] In an eighth aspect, a computer program product is provided. The computer program product includes computer instructions. When the computer instructions are executed on a computer, the computer instructions cause the computer to perform the communication method in the first aspect or any possible design of the first aspect, or cause the computer to perform the communication method in the second aspect or any possible design of the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0061] FIG. 1 is a schematic diagram of a sensing mode;

[0062] FIG. 2 is a schematic diagram of an architecture of a communication system in a situation of integrated sensing and communication according to an embodiment of the present application;

[0063] FIG. 3 is a schematic diagram of an architecture of a communication system according to an embodiment of the present application;

[0064] FIG. 4 is a schematic diagram of an architecture of a communication system according to an embodiment of the present application;

[0065] FIG. 5 is a schematic diagram of a connection relationship between a network device and a terminal device according to an embodiment of the present application;

[0066] FIG. 6 is a schematic diagram of a flow of a communication method according to an embodiment of the present application;

[0067] FIG. 7 is a schematic diagram of a first time-domain resource according to an embodiment of the present application;

[0068] FIG. 8 is a schematic diagram of another first time-domain resource according to an embodiment of the present application;

[0069] FIG. 9 is a schematic diagram of a first time-domain resource and a second time-domain resource according to an embodiment of the present application;

[0070] FIG. 10 is a schematic diagram of a time-domain resource and a frequency-domain resource according to an embodiment of the present application;

[0071] FIG. 11 is a schematic diagram of another time-domain resource and frequency-domain resource according to an embodiment of the present application;

[0072] FIG. 12 is a schematic diagram of another first time-domain resource according to an embodiment of the present application;

[0073] FIG. 13 is a schematic diagram of a structure of a communication apparatus according to an embodiment of the present application;

[0074] FIG. 14 is a schematic diagram of a structure of a communication apparatus according to an embodiment of the present application;

[0075] FIG. 15 is a schematic diagram of a structure of a communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0076] Before introducing embodiments of the present application, some technical terms involved in the embodiments of the present application are explained and described. It should be noted that the following explanation and description are for the purpose of making the embodiments of the present application easier to be understood, and should not be regarded as limiting the scope of protection claimed by the embodiments of the present application.

[0077] Integrated sensing and communication (ISAC), also known as sensing and communication integration, is a key technology in future wireless communication networks, aiming to integrate wireless communication and sensing functions in the same system, and realize positioning, detection, imaging and identification of the sensed target based on various propagation characteristics of wireless signals, to obtain information about the surrounding physical environment, tap the communication capability and enhance user experience. For example, a first device transmits a sensing signal, and a second device (or the first device) receives a backwave signal of the sensing signal reflected by a sensed target in the environment to perform sensing.

[0078] In this embodiment, sensing can also be referred to as detection. The sensed target can be understood as detecting a parameter of a target in the physical environment, such as the position of the target or the speed of the target.

[0079] In this embodiment, the sensing signal refers to a signal used for sensing (or detecting) the sensed target (also referred to as the target). The sensing signal is also referred to as a detection signal, a linear frequency modulation signal, a radar signal, a radar sensing signal, a radar detection signal, an environmental sensing signal, etc. The sensing signal can be a pulse signal or a signal in a wireless communication system. For example, the sensing signal can be an orthogonal frequency division multiplexing (OFDM) signal obtained after modulating a specific sequence on a subcarrier, and the specific sequence can be any one of the following sequences: a Zadoff-Chu sequence (ZC sequence), a pseudo-random sequence, a predefined sequence, etc. The pseudo-random sequence includes any one of the following sequences: a maximum length linear feedback shift register sequence (m-sequence), a GOLD sequence, etc. The predefined sequence can be, for example, a random data symbol, for example, a random data symbol modulated by quadrature phase shift keying (QPSK), 16 quadrature amplitude modulation (QAM), etc.

[0080] In this embodiment, the backwave signal refers to a signal generated by reflecting the sensing signal by the sensed target. The time delay of the backwave signal relative to the sensing signal can reflect the distance of the sensed target relative to the first device; the Doppler frequency shift of the backwave signal relative to the sensing signal can reflect the speed of the sensed target.

[0081] In this embodiment, the sensed target can be various tangible objects in the environment that can reflect electromagnetic waves, such as landforms, forests or buildings, and can also include movable objects such as vehicles, unmanned aerial vehicles, pedestrians and terminal devices.

[0082] In this application, the perceived target can also be referred to as a target, a target object, a detected target, a perceived object, a detected object, or a perceived device, etc. The embodiments of this application are not limited. For ease of description, the perceived target is described alternatively as the target below.

[0083] According to the difference between the sending end and the receiving end of the sensing signal, the sensing mode can be divided into two categories: single-station sensing and double-station sensing. Single-station sensing refers to that the device sending the sensing signal and the device receiving the echo signal of the sensing signal are the same device; double-station sensing refers to that the device sending the sensing signal and the device receiving the echo signal of the sensing signal are different devices.

[0084] FIG. 1 shows a sensing mode schematic diagram. As shown in FIG. 1, the sensing device can include a base station and / or a terminal device. Optionally, the base station can include a base station A and a base station B, and the terminal device can include a terminal device A and a terminal device B.

[0085] As shown in FIG. 1, the single-station sensing mode can include a base station self-sending and self-receiving sensing mode and a terminal device self-sending and self-receiving sensing mode. As shown in 1-1 in FIG. 1, in the base station self-sending and self-receiving sensing mode, the base station is both the device sending the sensing signal and the device receiving the echo signal. As shown in 1-2 in FIG. 1, in the terminal device self-sending and self-receiving sensing mode, the terminal device is both the device sending the sensing signal and the device receiving the echo signal.

[0086] As shown in FIG. 1, the double-station sensing mode can include a base station A sending and a base station B receiving sensing mode, a terminal device A sending and a terminal device B receiving sensing mode, a base station sending and a terminal device receiving sensing mode, and a terminal device sending and a base station receiving sensing mode. As shown in 1-3 in FIG. 1, in the base station A sending and the base station B receiving sensing mode, the base station A is the device sending the sensing signal, and the base station B is the device receiving the echo signal. As shown in 1-4 in FIG. 1, in the terminal device A sending and the terminal device B receiving sensing mode, the terminal device A is the device sending the sensing signal, and the terminal device B is the device receiving the echo signal. As shown in 1-5 in FIG. 1, in the base station sending and the terminal device receiving sensing mode, the base station is the device sending the sensing signal, and the terminal device is the device receiving the echo signal. As shown in 1-6 in FIG. 1, in the terminal device sending and the base station receiving sensing mode, the terminal device is the device sending the sensing signal, and the base station is the device receiving the echo signal.

[0087] In the networking scenario, all base stations use the same time-frequency resource for sensing. Taking a base station A supporting the self-initiated and self-received sensing mode as an example, the method for sensing a target by the base station A includes: periodically transmitting, by the base station, a sensing signal in the same beam direction within a coherent processing time, further, receiving, by the base station, a return signal of the sensing signal, and coherently accumulating all the return signals received within the time to achieve the position and / or speed of the target. The coherent accumulation can be generally achieved by two-dimensional Fourier transform on the channel matrix of all the return signals within the time. It should be noted that in the networking scenario, the sensing signal transmitted by each base station within the coherent processing time is the same, or in other words, each base station repeatedly transmits the sensing signal within the coherent processing time.

[0088] Since all base stations use the same time-frequency resource for sensing, the base station A receives not only the return signal of the sensing signal transmitted by itself, but also the sensing signal (i.e., inter-base station interference signal) transmitted by other devices (such as other base stations, terminals, etc.) and noise signals. In addition, since the sensing signal transmitted by each base station within the coherent processing time is the same, the sensing signal (i.e., inter-base station interference signal) transmitted by other devices received by the base station A is also almost unchanged. Thus, after the base station A performs discrete Fourier transform (DFT) on the signals received within the coherent processing time, the inter-base station interference signal is concentrated at zero frequency or low frequency (since the positions of other devices are fixed, the base station A regards the interference signal as a zero-speed or low-speed interference target, so the inter-base station interference signal is concentrated at zero frequency or low frequency), and the zero-speed / low-speed target is masked by the interference signal, which cannot be sensed.

[0089] Therefore, to solve the above problems, the embodiments of the present application provide a communication method, which can include:

[0090] The first device obtains a first time domain resource including M time domain symbols, and transmits a first signal on the M time domain symbols. M is an integer greater than 1; the interval between any two time domain symbols of the M time domain symbols is greater than or equal to 1 time domain symbol; the first signal transmitted on a time domain symbol a of the M time domain symbols is the product of a second signal and an element a in a scrambling sequence; the time domain symbol a is a time domain symbol with index a in the M time domain symbols; the element a in the scrambling sequence is an element with index a in the scrambling sequence; a is an integer greater than or equal to 0, and a is an integer less than M; the length of the scrambling sequence is equal to M, and the scrambling sequence is obtained according to a constant modulus zero correlation sequence. In this way, the first signal transmitted by the first device on the M time domain symbols of the first time domain resource is obtained by scrambling the second signal using the scrambling sequence, so that a device receiving a first signal coherently accumulates all signals received within a coherent processing time, and because the constant modulus zero correlation sequence (referring to the constant modulus zero correlation sequence used to obtain the scrambling sequence) used by other devices is irrelevant to the constant modulus zero correlation sequence used by the first device, the first signal (i.e., inter-base station interference signal) transmitted by other devices and the first signal transmitted by the first device are orthogonal to each other, so that the inter-base station interference signal is located at a medium-high frequency in the Doppler dimension, and is no longer concentrated at zero frequency or low frequency, and the stationary or low-speed target is no longer obscured by the interference signal, thereby achieving effective perception of the stationary or low-speed target.

[0091] Optionally, the first signal and the second signal are used for perceiving a target, and therefore, the first signal can be alternatively described as a first perception signal, and the second signal can be alternatively described as a second perception signal.

[0092] Optionally, the first device can be a network device, for example, a base station; and the second network device can be a terminal device, for example, a terminal.

[0093] Illustratively, in a networking scenario including a base station A and a base station B, the base station A and the base station B transmit a first signal using the communication method provided in the embodiments of the present application, it is assumed that the perception mode of the base station A is a self-perception and self-reception mode, and the base station A transmits the first signal to perceive a target A, the target A being a stationary or low-speed target, the first signal being obtained by scrambling a second signal using a scrambling sequence generated by the base station A, the second signal being an OFDM signal generated based on a Zadoff-Chu sequence; the base station B transmits the first signal to perceive a target, and the first signal transmitted by the base station B is obtained by scrambling a second signal using a scrambling sequence The scrambling of the second signal is obtained. Wherein, M is equal to the length of the scrambling code sequence, M is an integer greater than 1; n is the index in the scrambling code sequence, n = 0, 1, …, M-1; s2 and s1 are constants, and s2 and s1 are not equal; the root value u is an integer greater than or equal to 1, and u is an integer less than or equal to M-1. When the base station A does the sensing processing, the conjugate of the first signal of the base station A (i.e. the echo signal of the first signal) and the received first signal of the base station B (i.e. the inter-base station interference signal) are multiplied. In the dimension of the coherent processing time, there will be a term, after DFT, the inter-base station interference signal appears at the frequency , which corresponds to the position of non-zero speed or non-low speed in the range-velocity spectrum, that is, the inter-base station interference signal does not concentrate in the zero speed / low speed position of the range-velocity spectrum, so that the stationary or low speed target will not be shielded by the inter-base station interference signal, thereby realizing effective sensing / detection of the stationary or low speed target.

[0094] It should be understood that the first device and the sensing device receiving the echo signal of the first signal can be the same or different. For example, when the first device is in a single station sensing mode, the first device is both the device sending the sensing signal and the device receiving the echo signal, so the first device is the same as the sensing device receiving the echo signal of the first signal. For example, when the first device is in a double station sensing mode, the first device is the device sending the sensing signal, and the other sensing device other than the first device is the sensing device receiving the echo signal of the first signal, so the first device is different from the sensing device receiving the echo signal of the first signal.

[0095] The communication method provided by the embodiments of the present application will be described below in conjunction with the drawings in the specification.

[0096] The technical method of the embodiments of the present application can be applied to various communication systems in the integrated scenario, which can be a third generation partnership project (3GPP) communication system, for example, a long term evolution (LTE) system, and can also be a fifth generation (5G) mobile communication system, a new radio (NR) system, a new radio vehicle to everything (NR V2X) system, and can also be applied to a system of mixed networking of LTE and 5G, or a Bluetooth system, a long range radio (LoRa) system, a vehicle to everything (V2X) system, a satellite communication system, a wireless fidelity (WiFi) system, a device-to-device (D2D) communication system, a machine to machine (M2M) communication system, an integrated access and backhaul (IBA) communication system, an Internet of Things (IoT), and other future communication systems, and can also be a non-3GPP communication system, without limitation.

[0097] The technical solution of the embodiments of the present application can be applied to various communication scenarios, for example, can be applied to one or more of the following communication scenarios: enhanced mobile broadband (eMBB), ultra-reliable low latency communication (URLLC), machine type communication (MTC), massive machine type communication (mMTC), D2D, V2X, and IoT communication scenarios.

[0098] The various communication systems in the integrated sensing and communication scene provided by the embodiments of the present application can enable the network device and the terminal device to perceive the target while communicating. FIG. 2 is a schematic diagram of an architecture of a communication system in an integrated sensing and communication scene. The following takes the communication system in the integrated sensing and communication scene shown in FIG. 2 as an example. The communication system in the integrated sensing and communication scene shown in FIG. 2 includes a base station, terminals, and targets. The base station has a communication capability and a sensing capability. The terminals have a communication capability and a sensing capability, and can include terminal 1, terminal 2, and terminal 3. The targets are objects without a communication function, and can include target 1, target 2, target 3, target 4, and target 5.

[0099] The base station communicates with the terminal 1 while perceiving the target 1. The base station perceives the target 1 by receiving a back wave signal of a sensing signal 1 for perceiving the target 1 sent by the terminal 1.

[0100] The base station communicates with the terminal 2.

[0101] The base station communicates with the terminal 3 while perceiving the target 2. The base station perceives the target 2 by sending a sensing signal 2 for perceiving the target 2 and receiving a back wave signal of the sensing signal 2 received by the terminal 3.

[0102] The base station perceives the target 3 by sending a sensing signal 3 for perceiving the target 3 and receiving a back wave signal of the sensing signal 3.

[0103] The base station perceives the target 4 by sending a sensing signal 4 for perceiving the target 4 and receiving a back wave signal of the sensing signal 4.

[0104] The base station perceives the target 5 by sending a sensing signal 5 for perceiving the target 5 and receiving a back wave signal of the sensing signal 5.

[0105] In addition, the various communication systems in the integrated sensing and communication scene provided by the embodiments of the present application do not limit the type of sensing mode. For example, the sensing mode in the various communication systems in the integrated sensing and communication scene provided by the embodiments of the present application can be any one of the sensing modes in FIG. 1.

[0106] FIG. 3 is a schematic diagram of an architecture of a communication system provided by an embodiment of the present application. As shown in FIG. 3, the communication system can include a first device and a second device.

[0107] The first device in FIG. 3 is a device that transmits the first signal. Optionally, the first device can also be a device that receives the echo signal of the first signal, or the first device is not a device that receives the echo signal of the first signal. If the first device is not a device that receives the echo signal of the first signal, the communication system shown in FIG. 3 can further include a third device configured to receive the echo signal of the first signal from the first device. In the sensing-integrated scenario, the first signal is a sensing signal, and the first device is a device that transmits the sensing signal.

[0108] The second device in FIG. 3 is a device that receives the first signal from the first device. In the sensing-integrated scenario, the second device can also be a target that is sensed by the first device using the first signal.

[0109] Optionally, the communication system shown in FIG. 3 can further include a target. The target includes a target 1 and / or a target 2, the target 1 is a target at a low speed or a stationary target, and the target 2 is a target at a high speed. For example, in the case that the second device is not a target sensed by the first device in the sensing-integrated scenario, the communication system shown in FIG. 3 includes the target.

[0110] In the embodiments of the present application, the first device can be a network device or a terminal device, and the second device can be a network device or a terminal device. The network device and the terminal device in the embodiments of the present application are described below with reference to the architecture diagram of the communication system 4000 shown in FIG. 4.

[0111] FIG. 4 is an architecture diagram of a communication system 4000 provided by the embodiments of the present application. In FIG. 4, the communication system 4000 includes a radio access network (RAN) 100, a core network (CN) 200, and an Internet 300. The RAN 100 includes at least one RAN node (such as 110a and 110b in FIG. 4, collectively referred to as 110) and at least one terminal device (such as 120a-120j in FIG. 4, collectively referred to as 120). The RAN 100 can further include other RAN nodes, such as a wireless relay device and / or a wireless backhaul device (not shown in FIG. 4), etc. The terminal device 120 is connected to the RAN node 110 in a wireless manner. The RAN node 110 is connected to the core network 200 in a wireless or wired manner. The core network device in the core network 200 and the RAN node 110 in the RAN 100 can be different physical devices respectively, or can be the same physical device integrated with the logical functions of the core network and the logical functions of the radio access network.

[0112] The RAN 100 can be a 3GPP related cellular system, e.g., a 4G, 5G mobile communication system, or other future evolvement of the system. The RAN 100 can also be an open RAN (O-RAN or ORAN), a cloud radio access network (CRAN), or a WiFi system. The RAN 100 can also be a communication system that combines two or more of the above systems.

[0113] The RAN node 110, which can also be referred to as an access network device or a network device, a RAN entity or an access node, etc., forms part of the communication system, and is configured to facilitate wireless access by terminal devices. The RAN nodes 110 in the communication system 4000 can be of the same type or of different types.

[0114] In a possible scenario, the RAN node can be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a base station in a future mobile communication system, or an access node in a WiFi system, etc. The RAN node can be a macro base station (e.g., 110a in FIG. 4), a micro base station or an indoor station (e.g., 110b in FIG. 4), a relay node or a donor node, or a wireless controller in a CRAN scenario. Optionally, the RAN node can also be a server, a wearable device, a vehicle or a vehicle-mounted device, etc. For example, the access network device in vehicle to everything (V2X) technology can be a road side unit (RSU). In some scenarios, the roles of the RAN node 110 and the terminal device 120 are relative, e.g., a helicopter or a drone that is usually configured as a terminal can also be configured as a mobile base station, and a device configured as a terminal that accesses to the RAN through the helicopter or the drone.

[0115] In another possible scenario, a terminal is assisted by multiple RAN nodes to implement wireless access, and different RAN nodes respectively implement part of functions of a base station. Specifically, a RAN node can be a central unit (CU), a distributed unit (DU), or a radio unit (RU), etc. For example, a CU can complete functions of a radio resource control (RRC) layer and functions of a packet data convergence protocol (PDCP) layer of a base station. The CU can also complete functions of a service data adaptation protocol (SDAP) layer. A DU can complete functions of a radio link control (RLC) layer and functions of a medium access control (MAC) layer of a base station. The DU can also complete functions of part of a physical layer or all of a physical layer. An RU can be used to implement functions of transceiving radio frequency signals. The CU and the DU can be separately arranged, or can be included in the same network element, for example, a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, for example, included in a remote radio unit (RRU), an active antenna processing unit (AAU), or a remote radio head (RRH). In addition, the CU can be further divided into a CU-control plane (CP) and a CU-user plane (UP).

[0116] In different systems, the CU (or CU-CP and CU-UP), the DU, or the RU can also have different names, but those skilled in the art can understand their meanings. For example, in an ORAN system, the CU can also be referred to as an O-CU (open CU), the DU can also be referred to as an O-DU, the CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, and the RU can also be referred to as an O-RU. For the convenience of description, the CU, the CU-CP, the CU-UP, the DU, and the RU are taken as examples for description in this application. Any one of the CU (or the CU-CP, the CU-UP), the DU, and the RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0117] The terminal device 120 is a device with wireless transceiving function, which can be deployed on land, including indoor, outdoor, handheld or vehicle-mounted; can also be deployed on water surface (such as ships, etc.); can also be deployed in the air (such as airplanes, balloons and satellites, etc.). The terminal device can also be called terminal, and the terminal device can be user equipment (UE), mobile station (MS), mobile terminal (MT), etc., or a device for providing voice or data connectivity to users. Among them, the UE includes handheld devices with wireless communication function, vehicle-mounted devices (such as cars, bicycles, electric vehicles, airplanes, ships, trains, high-speed rails, etc.), wearable devices (such as smart watches, smart bracelets, pedometers, etc.) or computing devices. Exemplarily, the UE can be a mobile phone, a tablet computer, a notebook computer, a palm computer, a mobile internet device (MID), a satellite terminal or a computer with wireless transceiving function. The UE can also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless modem, a smart point of sale (POS) machine, a customer-premises equipment (CPE), a smart robot, a mechanical arm, a workshop device, a smart home device (such as a refrigerator, a television, an air conditioner, an electric meter, etc.), a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in remote medical treatment, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart traffic, a wireless terminal in smart city, a wireless terminal in smart home, a vehicle-mounted terminal, an RSU with terminal function, or a flight device (such as a smart robot, a hot air balloon, a drone, an airplane), etc. The terminal can also be other devices with terminal function, for example, the terminal can also be a device with terminal function in device to device (D2D) communication.

[0118] By way of example, and without limitation, in the present application, the terminal device can be a wearable device. The wearable device can also be referred to as a wearable smart device, which is a general term for devices that are designed and developed by applying wearable technology to daily wear, such as glasses, gloves, watches, clothing, and shoes. The wearable device is a portable device that is directly worn on the body or integrated into the clothes or accessories of the user. For example, the wearable device is not only a hardware device, but also a device that realizes powerful functions through software support and data interaction and cloud interaction. The broad sense of the wearable smart device includes devices with full functions, large sizes, and the ability to realize complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and devices that focus on a certain type of application function and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets and smart jewelry for monitoring vital signs.

[0119] In the present application, the terminal device can be a terminal in an internet of things (IoT) system. The IoT is an important part of future information technology development, and its main technical feature is to connect objects through communication technology and network to realize the intelligent network of human-machine interconnection and object-object interconnection. The terminal in the present application can be a terminal in machine type communication (MTC).

[0120] The terminal device of the present application can be an on-board module, an on-board module group, an on-board component, an on-board chip, an on-board unit (OBU), or a telematics box (T-BOX) built into a vehicle as one or more components or units. The vehicle can implement the method of the present application through the built-in on-board module, on-board module group, on-board component, on-board chip, on-board unit, or T-BOX. The terminal can also be a whole vehicle device. Therefore, the present application can be applied to the Internet of Vehicles, such as V2X, long term evolution vehicle (LTE-V), vehicle to vehicle (V2V), etc.

[0121] FIG. 5 is a schematic diagram of the connection relationship between a network device and a terminal device. As shown in FIG. 5, the network device and the terminal device can be connected through an air interface.

[0122] It can be understood that the above Figure 3 is only a schematic diagram, and does not constitute a limitation on the applicable scenarios of the technical solutions provided in the present application. Those skilled in the art should understand that, in the specific implementation process, the communication system shown in Figure 3 can also include fewer devices than those shown in Figure 3, or the communication system shown in Figure 3 can also include other devices, and the number of devices in the communication system shown in Figure 3 can also be determined according to specific needs, and is not limited.

[0123] Optionally, each device in Figure 3, such as the first device and the second device, can also be referred to as a sensing device or a perception device or a communication device, which can be a general-purpose device or a special-purpose device, and the embodiments of the present application do not make specific limitations.

[0124] Optionally, the functions of each device in Figure 3 of the present application can be implemented by one device, or can be implemented by multiple devices together, or can be implemented by one device and one or more functional modules in the device, and the embodiments of the present application do not make specific limitations. It can be understood that the above functions can be network elements in a hardware device, or software functions running on a special hardware, or a combination of hardware and software, or virtualized functions instantiated on a platform (such as a cloud platform).

[0125] The communication method provided in the embodiments of the present application will be described below in combination with the communication system shown in Figure 3. The actions, terms, etc. involved in the following embodiments can be mutually referred to, and the message names or parameter names in the messages exchanged between devices in each embodiment are only an example, and other names can also be used in specific implementation. For example, "corresponding" in the following embodiments can be replaced by "associated" or the like, and "sending" in the following embodiments can be replaced by "transmitting" or the like.

[0126] Figure 6 is a flow diagram of a communication method provided in an embodiment of the present application, as shown in Figure 6, which can include:

[0127] S601: The first device acquires a first time domain resource.

[0128] The first device is a device for sending a first signal, for example, the first device is the first device in the communication system shown in Figure 3.

[0129] The first time domain resource includes M time domain symbols, and M is an integer greater than 1. The interval between any two time domain symbols in the M time domain symbols is greater than or equal to 1 time domain symbol. Optionally, the interval between any two adjacent time domain symbols in the M time domain symbols is the same.

[0130] For example, FIG. 7 is a schematic diagram of M time domain symbols in a first time domain resource. As shown in FIG. 7, the time domain interval between the jth time domain symbol and the (j+1)th time domain symbol in the M time domains of the first time domain resource is 2 time domain symbols, j = 1, …, M-1; M is an integer greater than 1.

[0131] Optionally, the first time domain resource includes M time domain symbols and L time domain symbols, and the L time domain symbols are used to send a signal other than the first signal, such as a second signal, a communication signal, and the like. The second signal is described below in S602.

[0132] For example, FIG. 8 is a schematic diagram of M time domain symbols and L time domain symbols in a first time domain resource. As shown in FIG. 8, the time domain interval between the jth time domain symbol and the (j+1)th time domain symbol in the M time domains of the first time domain resource is 2 time domain symbols, j = 1, …, M-1; M is an integer greater than 1; and the time domain interval between the ith time domain symbol and the (i+1)th time domain symbol in the L time domains of the first time domain resource is also 2 time domain symbols, i = 1, …, L-1; L is an integer greater than 1. The M time domain symbols in the first time domain resource are used to send the first signal, and the L time domain symbols in the first time domain resource are used to send the second signal.

[0133] A time domain symbol is the smallest unit on a time domain resource, and is used to represent a specific segment of a signal on a time axis. In a digital communication system, the sending end encodes information into a series of time domain symbols, which are transmitted to the receiving end through a channel. The receiving end decodes and recovers these symbols to restore the original information.

[0134] A communication signal is a signal transmitted between communication devices for communication. For example, the communication signal includes a signal transmitted between a network device and a terminal device. The communication signal is a signal carried on a physical downlink shared channel (PDSCH).

[0135] S602: The first device sends the first signal on the M time domain symbols, and the second device receives the first signal from the first device on the M time domain symbols.

[0136] The first signal sent by the first device on the time domain symbol a in the M time domain symbols is the product of the second signal and the element a in the scrambling sequence; the time domain symbol a is the time domain symbol with index a in the M time domain symbols; the element a in the scrambling sequence is the element with index a in the scrambling sequence; a is an integer greater than or equal to 0, and a is an integer less than M.

[0137] The second device receiving the first signal from the first device on the M time domain symbols can include: the second device receiving first information from the first device, the first information being used to indicate the first time domain resource including the M time domain symbols, and receiving the first signal from the first device on the M time domain symbols indicated by the first information. The first information is described in detail below, and is not described here.

[0138] The second signal can be an OFDM signal generated based on a specific sequence or a discrete fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) signal. The specific sequence can include any one of a Zadoff-Chu sequence, a pseudo-random sequence, a predefined sequence, and a QAM-based complex sequence. The pseudo-random sequence includes a GOLD sequence and an m-sequence. The QAM-based complex sequence can include a QPSK-based complex sequence, a 16QAM-based complex sequence, a 256QAM-based complex sequence, a 1024QAM-based complex sequence, and the like.

[0139] The scrambling sequence is obtained according to a constant amplitude zero auto correlation (CAZAC) sequence. For example, the scrambling sequence is a sequence obtained by shifting the constant amplitude zero auto correlation sequence to the right or to the left by m bits, where m is an integer greater than or equal to 0, and m is an integer less than or equal to M-1; M is the length of the scrambling sequence.

[0140] The constant amplitude zero auto correlation sequence is a sequence with special properties, characterized by constant amplitude and zero autocorrelation function at non-zero delay. Common constant amplitude zero auto correlation sequences include Zadoff-Chu sequences, Frank sequences, Golomb polyphase sequences, and Chirp sequences.

[0141] In this application, the length of the scrambling sequence is M, that is, the scrambling sequence can include M elements, and M is an integer greater than 1. The scrambling sequence can be denoted as {w[n]}, which includes M elements.

[0142] This application does not limit the type of elements included in the scrambling sequence {w[n]}. For example, the elements included in the scrambling sequence can be complex numbers, or real numbers, or imaginary numbers.

[0143] The application does not limit the representation of the M elements in the scrambling sequence {w[n]}. For example, when the M elements in {w[n]} are numbered / indexed starting from 0, the (n+1)th element in {w[n]} is the element with the number / index n, where n is any integer between 0 and M-1, that is, n∈[0,…,M-1], and n is an integer, and the (n+1)th element in {w[n]} can be represented as w[n]. When the M elements in {w[n]} are numbered / indexed starting from 1, the nth element in {w[n]} is the element with the number / index n, where n is any integer between 1 and M, that is, n∈[1,…,M], and n is an integer, and the nth element in {w[n]} can be represented as w[n].

[0144] For example, when the 5 elements in {w[n]} are numbered / indexed starting from 0, the 5 elements in the scrambling sequence {w[n]} can be denoted as w[0], w[1], w[2], w[3], and w[4], respectively. When the 5 elements in {w[n]} are numbered / indexed starting from 1, the 5 elements in the scrambling sequence {w[n]} can be denoted as w[1], w[2], w[3], w[4], and w[5], respectively.

[0145] Based on the communication method shown in FIG. 6, the first device transmits the first signal on the M time domain symbols of the first time domain resource, and the first signal transmitted on the time domain symbol a of the M time domain symbols is the product of the second signal and the element a in the scrambling sequence. In this way, the first signal transmitted by the first device on the M time domain symbols of the first time domain resource is obtained by scrambling the second signal using the scrambling sequence, so that the device receiving the echo signal of the first signal coherently accumulates all the signals received within the coherent processing time, and because the constant modulus zero correlation sequences used by other devices are mutually unrelated to the constant modulus zero correlation sequence used by the first device, that is, the first perception (i.e., the inter-base station interference signal of the first device) transmitted by other devices is orthogonal to the first signal transmitted by the first device, so that the inter-base station interference signal is located at the medium and high frequencies in the Doppler dimension, and is no longer concentrated at zero frequency or low frequency, and the stationary or low-speed target is no longer obscured by the interference signal, thereby achieving effective perception of the stationary or low-speed target.

[0146] Optionally, based on the communication method shown in FIG. 6, S603 or S604 can be further included to enable the first device to transmit the second signal.

[0147] S603: The first device transmits the second signal on the second time domain resource, and the second device receives the second signal on the second time domain resource.

[0148] The related description of the second signal is described in S602 and is not repeated here.

[0149] The second time domain resource and the first time domain resource do not overlap. A related description parameter S601 of the first time domain resource is not repeated here.

[0150] It should be noted that, in the case that the first device transmits the first signal on the first time domain resource and transmits the second signal on the second time domain resource, the first device transmits different signals using different time domain resources, that is, the first device transmits the first signal and the second signal in a time division multiplexing manner, so that the first device can detect a zero-speed or low-speed target based on the first signal and detect a high-speed target based on the second signal.

[0151] In a possible implementation, the first time domain resource is located in a first time period, and the second time domain resource is located in a second time period. The first time period and the second time period do not overlap, and the length of the first time period and the length of the second time period are both greater than or equal to the length of the coherent processing time.

[0152] In addition, it should be noted that, in the implementation manner in which the first device performs S603, the frequency domain resources for transmitting the first signal and the second signal are not limited. For example, the frequency domain resources for transmitting the first signal and the second signal are the same, the first device can transmit the first signal on the first time domain resource and the first frequency domain resource, and transmit the second signal on the second time domain resource and the first frequency domain resource. For another example, the first device can transmit the first signal on the first time domain resource and the first frequency domain resource, and transmit the second signal on the second time domain resource and the second frequency domain resource. The first frequency domain resource and the second frequency domain resource do not overlap.

[0153] S604: The first device transmits the second signal on the first frequency domain resource and M time domain symbols of the first time domain resource, and the second device receives the second signal on the second frequency domain resource and M time domain symbols of the first time domain resource.

[0154] The second frequency domain resource and the first frequency domain resource do not overlap, and the first frequency domain resource is used to transmit the first signal.

[0155] S604 is an optional operation, and the first device transmits the first signal on the first frequency domain resource and M time domain symbols of the first time domain resource, and S604 can be performed. It should be noted that, in the implementation manner in which the first device performs S604, the first device transmits different signals using different frequency domain resources, that is, the first device transmits the first signal and the second signal in a frequency division multiplexing manner, so that the first device can detect a zero-speed or low-speed target based on the first signal and detect a high-speed target based on the second signal.

[0156] The overall flow of the communication method provided in the present application is described above, and the related steps and information in the communication method are introduced in detail below.

[0157] As a possible implementation, in the communication method shown in FIG. 6, the first device detects a zero-speed or low-speed target based on the first signal, and detects a high-speed target based on the second signal, at this time, the first device needs to obtain the first time domain resource in S601, and also needs to obtain a resource for sending the second signal. The resource for sending the second signal can include a time domain resource and / or a frequency domain resource.

[0158] In the case that the first device detects a zero-speed or low-speed target based on the first signal, and detects a high-speed target based on the second signal, the first device obtaining the first time domain resource can include the following cases:

[0159] (1) The first device obtains the first time domain resource for sending the first signal, and obtains the second time domain resource for sending the second signal. The first time domain resource and the second time domain resource do not overlap. For example, FIG. 9 is a schematic diagram of the first time domain resource and the second time domain resource. As shown in FIG. 9, the first time domain resource includes M time domain symbols, any one of the M time domain symbols carries the first signal; the second time domain resource does not overlap with the first time domain resource, and the second time domain resource includes N (N is an integer greater than 1, and optionally, N=M) time domain symbols, any one of the N time domain symbols carries the second signal. That is, the first device sends the first signal on the M time domain symbols of the first time domain resource, and sends the second signal on the N time domain symbols of the second time domain resource.

[0160] (2) The first device obtains the first frequency domain resource and the first time domain resource for sending the first signal, and obtains the second frequency domain resource and the second time domain resource for sending the second signal. The first frequency domain resource and the second frequency domain resource do not overlap; the first time domain resource and the second time domain resource can be the same time domain resource, that is, the M time domain symbols of the first time domain resource. For example, FIG. 10 is a schematic diagram of a time domain resource and a frequency domain resource. As shown in FIG. 10, the first frequency domain resource, and any one of the M time domain symbols of the first time domain resource carries the first signal; the second frequency domain resource, and any one of the M time domain symbols of the first time domain resource carries the second signal; the first frequency domain resource does not overlap with the second frequency domain resource. That is, the first device sends the first signal on the first frequency domain resource and the M time domain symbols of the first time domain resource, and sends the second signal on the second frequency domain resource and the M time domain symbols of the first time domain resource.

[0161] (3) The first device acquires a first frequency domain resource and a first time domain resource for transmitting the first signal, and acquires a second frequency domain resource and a second time domain resource for transmitting the second signal. The first time domain resource and the second time domain resource do not overlap, and the first frequency domain resource and the second frequency domain resource do not overlap. For example, FIG. 11 is a schematic diagram of another time domain resource and frequency domain resource. As shown in FIG. 11, the first frequency domain resource and any one of the M time domain symbols of the first time domain resource carry the first signal; the second frequency domain resource and any one of the N (N is an integer greater than 1, and optionally, N = M) time domain symbols of the second time domain resource carry the second signal; the first frequency domain resource and the second frequency domain resource do not overlap, and the first time domain resource and the second time domain resource do not overlap. That is, the first device transmits the first signal on the first frequency domain resource and the M time domain symbols of the first time domain resource, and transmits the second signal on the second frequency domain resource and the N time domain symbols of the second time domain resource.

[0162] It should be noted that the first frequency domain resource described above can be a frequency domain resource for transmitting the first signal, and the first time domain resource can be understood in relation to the description in S601, which will not be repeated here. Optionally, the first time domain resource and the first frequency domain resource can be referred to as a first time-frequency resource.

[0163] It should be noted that the second frequency domain resource described above can be a frequency domain resource for transmitting the second signal, and the second time domain resource can be a time domain resource for transmitting the second signal. Optionally, the second time domain resource and the second frequency domain resource can be referred to as a second time-frequency resource.

[0164] As a possible implementation, in the step S602, the scrambling sequence is obtained according to a constant modulus zero correlation sequence, and the specific process can include the following examples:

[0165] In one example, in the step S602, the scrambling sequence {w[n]} is obtained by cyclically shifting the constant modulus zero correlation sequence to the right by m bits.

[0166] In this application, the constant modulus zero correlation sequence can be denoted as {a[n]}, and {a[n]} includes M elements. M is an integer greater than 1; n is any integer between 0 and M-1, i.e. n∈[0, …, M-1], and n is an integer; m is an integer greater than or equal to 0, and m is an integer less than or equal to M-1.

[0167] For example, assuming that the M elements in the scrambling sequence {w[n]} and the constant modulus zero correlation sequence {a[n]} are numbered / indexed from 0, the parameters of the constant modulus zero correlation sequence {a[n]} can include α, β, γ, and the element a[n] in the constant modulus zero correlation sequence {a[n]} with the index n satisfies:

[0168] In formula (1), 2a and M have a greatest common divisor of 1, that is, 2a and M are co-prime, and aM+β is an integer; γ is an arbitrary constant.

[0169] An element w[n] with index n in the scrambling sequence {w[n]} corresponding to the constant modulus zero correlation sequence {a[n]} satisfies: w[n] = a[n-m] M = a[(n-m)mod M] (2)

[0170] In formula (2), a[n-m] M is a sequence element corresponding to periodic extension of the constant modulus zero correlation sequence {a[n]} with M as a period and then shifting right by m bits; mod is a modulo operation; m is a right circular shift value of the constant modulus zero correlation sequence {a[n]}; M, n, and m are described above and are not limited herein. As can be seen from formula (2), the element w[n] with index n in the scrambling sequence {w[n]} is the element with index [(n-m)mod M] in the constant modulus zero correlation sequence {a[n]}.

[0171] It should be noted that when m in formula (2) is 0, the scrambling sequence {w[n]} is a sequence obtained by not circularly shifting the constant modulus zero correlation sequence to the right, that is, the scrambling sequence {w[n]} is the constant modulus zero correlation sequence {a[n]}.

[0172] For example, taking M=4 as an example, n∈[0, 1, 2, 3] in the constant modulus zero correlation sequence {a[n]}, the elements in the scrambling sequence {w[n]} and the constant modulus zero correlation sequence {a[n]} are numbered / indexed from 0, the elements in {a[n]} include {a[0], a[1], a[2], a[3]}, and it is assumed that the right circular shift value m of the constant modulus zero correlation sequence {a[n]} is 1. The sequence element a[n-m]4 corresponding to periodic extension of the constant modulus zero correlation sequence {a[n]} with 4 as a period and then shifting right by 1 bit is {a[3], a[0], a[1], a[2]}, that is, w[0] = a[3], w[1] = a[0], w[2] = a[1], and w[3] = a[2] in the scrambling sequence {w[n]}.

[0173] In another example, in the step S602, the scrambling sequence {w[n]} is a sequence obtained by circularly shifting the constant modulus zero correlation sequence to the left by m bits. The constant modulus zero correlation sequence {a[n]} is described above and is not repeated here.

[0174] An element w[n] with index n in the scrambling sequence {w[n]} corresponding to the constant modulus zero correlation sequence {a[n]} satisfies: w[n] = a[n+m] M= a[(n+m)mod M] (3)

[0175] In formula (3), a[n+m] M is a sequence element corresponding to the periodic extension of the constant modulus zero correlation sequence {a[n]} with M as the period and then shifting left by m bits; mod is a modulo operation; m is a left cyclic shift value of the constant modulus zero correlation sequence {a[n]}; and the values of M, n, and m are described above and are not limited herein. As can be seen from formula (3), the element w[n] with the number / index n in {w[n]} is the element with the number / index [(n+m)mod M] in {a[n]}.

[0176] It should be noted that when m in formula (3) is 0, the scrambling sequence {w[n]} is a sequence obtained by not performing left cyclic shift on the constant modulus zero correlation sequence, that is, the scrambling sequence {w[n]} is the constant modulus zero correlation sequence {a[n]}.

[0177] For example, taking M=4 as an example, n∈[0, 1, 2, 3] in the constant modulus zero correlation sequence {a[n]}, the elements in the scrambling sequence {w[n]} and the constant modulus zero correlation sequence {a[n]} are numbered / indexed from 0, the elements in {a[n]} include {a[0], a[1], a[2], a[3]}, and it is assumed that the left cyclic shift value m of the constant modulus zero correlation sequence {a[n]} is 1, the sequence element a[n+m]4 corresponding to the periodic extension of the constant modulus zero correlation sequence {a[n]} with 4 as the period and then shifting left by 1 bit is {a[1], a[2], a[3], a[0]}, that is, w[0]=a[1], w[1]=a[2], w[2]=a[3], and w[3]=a[0] in the scrambling sequence {w[n]}.

[0178] In another example, in the step S602, the scrambling sequence {w[n]} is a sequence obtained by performing right cyclic shift on the Zadoff-Chu sequence by m bits.

[0179] In the present application, the Zadoff-Chu sequence can be denoted as {d[n]}, and {d[n]} includes M elements. M is an integer greater than 1; n is any integer between 0 and M-1, that is, n∈0, …, M-1, and n is an integer; m is an integer greater than or equal to 0, and m is an integer less than or equal to M-1. The following takes the element w[n] with the number / index n in the scrambling sequence {w[n]} as an example for introduction:

[0180] For example, assuming that the M elements in the scrambling sequence {w[n]} and the Zadoff-Chu sequence {d[n]} are numbered / indexed from 0, the parameters of the Zadoff-Chu sequence can include u, and an element d[n] in the Zadoff-Chu sequence {d[n]} with the number / index n satisfies:

[0181] In formula (4), the greatest common divisor of u and M is 1, that is, u and M are co-prime; u is an integer greater than or equal to 1, and u is an integer less than or equal to M-1. The parameter u can also be referred to as a root value.

[0182] An element w[n] in the scrambling sequence {w[n]} corresponding to the Zadoff-Chu sequence {d[n]} with the number / index n satisfies: w[n] = d[n-m] M = d[(n-m)mod M] (5)

[0183] In formula (5), d[n-m] M is a sequence element corresponding to the period extension of the Zadoff-Chu sequence {d[n]} with M as the period and then right-shifting m bits; mod is a modulo operation; m is a right-circular shift value of the Zadoff-Chu sequence {d[n]}. The values of M, n, and m are described above and are not limited herein. As can be seen from formula (5), the element w[n] in {w[n]} with the number / index n is an element in {d[n]} with the number / index [(n-m)mod M].

[0184] It should be noted that when m in formula (5) is 0, the scrambling sequence {w[n]} is a sequence obtained without right-circular shifting the Zadoff-Chu sequence, that is, the scrambling sequence {w[n]} is the Zadoff-Chu sequence {d[n]}.

[0185] For example, taking M = 4 as an example, n ∈ [0, 1, 2, 3] in the Zadoff-Chu sequence {d[n]}, the elements in the scrambling sequence {w[n]} and the Zadoff-Chu sequence {d[n]} are numbered / indexed from 0, the elements in {d[n]} include {d[0], d[1], d[2], d[3]}, assuming that the Zadoff-Chu sequence {d[n]} is cyclically shifted to the right by a value m of 2, the Zadoff-Chu sequence {d[n]} is periodically extended by 4 and then shifted to the right by 2 corresponding sequence elements d[n-m]4, that is, {d[2], d[3], d[0], d[1]}, that is, w[0] = d[2] in the scrambling sequence {w[n]}, w[1] = d[3], w[2] = d[0], and w[3] = d[1].

[0186] In another example, in the step S602, the scrambling sequence {w[n]} is a sequence obtained by cyclically shifting the Zadoff-Chu sequence to the left by m positions. The Zadoff-Chu sequence {d[n]} is described above and will not be repeated here.

[0187] The element w[n] with the number / index n in the scrambling sequence {w[n]} corresponding to the Zadoff-Chu sequence {d[n]} satisfies: w[n] = d[n-m] M = d[(n-m)mod M] (6)

[0188] In formula (6), d[n-m] M is a sequence element corresponding to the Zadoff-Chu sequence {d[n]} periodically extended by 4 and then shifted to the left by m positions; mod is a modulo operation; m is a cyclic shift value of the Zadoff-Chu sequence {d[n]} to the left. The values of M, n, and m are described above and will not be limited here. As can be seen from formula (6), the element w[n] with the number / index n in {w[n]} is the element with the number / index [(n+m)mod M] in {d[n]}.

[0189] It should be noted that when m in formula (6) is 0, the scrambling sequence {w[n]} is a sequence obtained by not cyclically shifting the Zadoff-Chu sequence to the left, that is, the scrambling sequence {w[n]} is the Zadoff-Chu sequence {d[n]}.

[0190] For example, for M = 4, n ∈ [0, 1, 2, 3] in the Zadoff-Chu sequence {d[n]}, the elements in the scrambling sequence {w[n]} and the Zadoff-Chu sequence {d[n]} are numbered / indexed starting from 0, the elements in {d[n]} include {d[0], d[1], d[2], d[3]}, assuming that the left cyclic shift value m of the Zadoff-Chu sequence {d[n]} is 2, the Zadoff-Chu sequence {d[n]} is periodically extended by 4 and then shifted left by 2 corresponding to the sequence element d[n+m]4 {d[2], d[3], d[0], d[1]}, that is, w[0] = d[2] in the scrambling sequence {w[n]}, w[1] = d[3], w[2] = d[0], w[3] = d[1].

[0191] As a possible implementation, in the communication method shown in FIG. 6, before performing the S602 step, the first device can also send first information to the second device, and the corresponding second device receives the first information from the first device.

[0192] The first information is used to indicate at least one of the following: the length M of the scrambling sequence {w[n]}, the cyclic shift value m, the parameters of the constant modulus zero correlation sequence, the first time domain resource, the parameters of the second signal, the first frequency domain resource, the second frequency domain resource, and the second time domain resource. The length M of the scrambling sequence {w[n]}, the cyclic shift value m, the first time domain resource, the first frequency domain resource, the second time domain resource, and the second frequency domain resource are described above and will not be repeated here.

[0193] The parameters of the constant modulus zero correlation sequence can include: α, β, γ. α, β, γ are described above in relation to the constant modulus zero correlation sequence {a[n]} and will not be repeated here.

[0194] It should be noted that the constant modulus zero correlation sequence includes the Zadoff-Chu sequence, and therefore the parameters of the constant modulus zero correlation sequence can be the parameters u of the Zadoff-Chu sequence. u is described above in relation to the Zadoff-Chu sequence {d[n]} and will not be repeated here.

[0195] The parameters of the second signal can be understood as the parameters for generating the second signal, and the parameters of the second signal can include the initial value of the GOLD sequence or the root value (i.e., u) of the Zadoff-Chu sequence. In the case of the second signal being an OFDM signal or DFT-s-OFDM signal generated based on the GOLD sequence, the parameters of the second signal include the initial value of the GOLD sequence. In the case of the second signal being an OFDM signal or DFT-s-OFDM signal generated based on the Zadoff-Chu sequence, the parameters of the second signal include the root value of the Zadoff-Chu sequence.

[0196] As a possible implementation, in the communication method shown in FIG. 6, before performing the step S602, the first device can further send second information to the second device, and the second device receives the second information from the first device.

[0197] In this application, the second information is used to indicate the first time unit where the M time domain symbols are located.

[0198] Optionally, the second information can also be used to indicate the first time unit where the time domain symbols carrying the second signal are located, so as to indicate the second device to start receiving the second signal from which time unit.

[0199] In this application, the time unit can be a time slot.

[0200] In this application, the second information can directly or indirectly indicate the first time unit where the M time domain symbols are located. For example, the second information carries the first time unit where the M time domain symbols are located, or the second information carries the number difference between the first time unit where the M time domain symbols are located and the time unit where the second information is located.

[0201] In this application, the second information can be carried in downlink signaling, such as downlink control information (DCI).

[0202] Optionally, the second information is sensing signal triggering information.

[0203] It should be understood that after the second device receives the second information from the first device, the second device can obtain the first time unit where the M time domain symbols are located through the indication of the second information, so as to accurately receive the first signal carried in the M time domain symbols.

[0204] As a possible implementation, in the step S602, the first device sends the product of the element a in the scrambling sequence {w[n]} and the second signal as the first signal sent in the time domain symbol a in the M time domain symbols. Wherein, the element a in the scrambling sequence {w[n]} is the element with index a in the scrambling sequence; the time domain symbol a is the time domain symbol with index a in the M time domain symbols; a is an integer greater than or equal to 0, and a is an integer less than M. The scrambling sequence {w[n]} is described above and will not be repeated here.

[0205] For example, FIG. 12 is a schematic diagram of a first time domain resource. As shown in FIG. 12, a coherent processing time includes 10 time slots, each time slot includes 14 time domain symbols, the 140 time domain symbols included in the coherent processing time are numbered / indexed starting from 0, and the coherent processing time is the time between time domain symbol 0 and time domain symbol 139. As shown in FIG. 12, the first time domain resource includes 20 time domain symbols, the 20 time domain symbols are spaced apart by 7 time domain symbols, at this time, time domain symbol 0 of the 20 time domain symbols is located at time domain symbol 6 in the coherent processing time, time domain symbol 1 of the 20 time domain symbols is located at time domain symbol 13 in the coherent processing time, time domain symbol 2 of the 20 time domain symbols is located at time domain symbol 20 in the coherent processing time, …, time domain symbol 18 of the 20 time domain symbols is located at time domain symbol 132 in the coherent processing time, and time domain symbol 19 of the 20 time domain symbols is located at time domain symbol 139 in the coherent processing time.

[0206] In an example, the first signal transmitted on the 20 time domain symbols of the first time domain resource in FIG. 12 is obtained according to a scrambling sequence {w[n]} and the second signal. The scrambling sequence {w[n]} has a length M of 20, the 20 elements included in the scrambling sequence {w[n]} are numbered / indexed starting from 0, element a in {w[n]} is the element numbered / indexed as a in the scrambling sequence {w[n]}, a is an integer greater than or equal to 0, and a is an integer less than 20. At this time in FIG. 12, the first signal transmitted / carried on time domain symbol 0 of the 20 time domain symbols is the product of the second signal and element 0 in the scrambling sequence {w[n]}, the first signal transmitted / carried on time domain symbol 1 of the 20 time domain symbols is the product of the second signal and element 1 in the scrambling sequence {w[n]}, …, the first signal transmitted / carried on time domain symbol 18 of the 20 time domain symbols is the product of the second signal and element 18 in the scrambling sequence {w[n]}, and the first signal transmitted / carried on time domain symbol 19 of the 20 time domain symbols is the product of the second signal and element 19 in the scrambling sequence {w[n]}.

[0207] In another example, the first signal transmitted on the 20 time domain symbols of the first time domain resource in FIG. 12 is obtained according to a constant modulus zero correlation sequence {a[n]} and the second signal. The constant modulus zero correlation sequence {a[n]} has a length M of 20, the 20 elements included in the constant modulus zero correlation sequence {a[n]} are numbered / indexed starting from 0, a is an element in the constant modulus zero correlation sequence {a[n]} with an index / number a, a is an integer greater than or equal to 0, and a is an integer smaller than 20. At this time in FIG. 12, the first signal transmitted / carried on the time domain symbol 0 of the 20 time domain symbols is a product of the second signal and the element 0 in the constant modulus zero correlation sequence {a[n]}, the first signal transmitted / carried on the time domain symbol 1 of the 20 time domain symbols is a product of the second signal and the element 1 in the constant modulus zero correlation sequence {a[n]},..., the first signal transmitted / carried on the time domain symbol 18 of the 20 time domain symbols is a product of the second signal and the element 18 in the constant modulus zero correlation sequence {a[n]}, and the first signal transmitted / carried on the time domain symbol 19 of the 20 time domain symbols is a product of the second signal and the element 19 in the constant modulus zero correlation sequence {a[n]}.

[0208] In another example, the first signal transmitted on the 20 time domain symbols of the first time domain resource in FIG. 12 is obtained according to a constant modulus zero correlation sequence {a[n]} and the second signal. The constant modulus zero correlation sequence {a[n]} has a length M of 20, the 20 elements included in the constant modulus zero correlation sequence {a[n]} are numbered / indexed starting from 0, a is an element in the constant modulus zero correlation sequence {a[n]} with an index / number a, a is an integer greater than or equal to 0, and a is an integer smaller than 20. At this time in FIG. 12, the first signal transmitted / carried on the time domain symbol 0 of the 20 time domain symbols is a product of the second signal and the element 0 in the constant modulus zero correlation sequence {a[n]}, the first signal transmitted / carried on the time domain symbol 1 of the 20 time domain symbols is a product of the second signal and the element 1 in the constant modulus zero correlation sequence {a[n]},..., the first signal transmitted / carried on the time domain symbol 18 of the 20 time domain symbols is a product of the second signal and the element 18 in the constant modulus zero correlation sequence {a[n]}, and the first signal transmitted / carried on the time domain symbol 19 of the 20 time domain symbols is a product of the second signal and the element 19 in the constant modulus zero correlation sequence {a[n]}.

[0209] As a possible implementation, in step S602, the first device detects a zero-speed or low-speed target based on the first signal and a high-speed target based on the second signal. At this time, the first device can transmit the second signal on the resource for transmitting the second signal in addition to transmitting the first signal on the M time domain symbols of the first time domain resource. The resource for transmitting the second signal can be referred to in the foregoing description and will not be described here.

[0210] In the case where the first device detects a zero-speed or low-speed target based on the first signal and a high-speed target based on the second signal, the first device transmits the first signal on the M time domain symbols (i.e., the M time domain symbols of the first time domain resource) can include the following cases:

[0211] (1) The first device transmits the first signal on the M time domain symbols of the first time domain resource and the first frequency domain resource and transmits the second signal on the second frequency domain resource and the second time domain resource. The first time domain resource and the second time domain resource do not overlap, and the first frequency domain resource and the second frequency domain resource do not overlap.

[0212] (2) The first device transmits the first signal on the M time domain symbols of the first time domain resource and the first frequency domain resource and transmits the second signal on the second frequency domain resource and the second time domain resource. The first time domain resource and the second time domain resource do not overlap.

[0213] (3) The first device transmits the first signal on the M time domain symbols of the first time domain resource and the first frequency domain resource and transmits the second signal on the second frequency domain resource and the second time domain resource. The first frequency domain resource and the second frequency domain resource do not overlap; and the first time domain resource and the second time domain resource can be the same time domain resource, i.e., the M time domain symbols of the first time domain resource.

[0214] It should be noted that the second device receives the signal transmitted by the first device on the time-frequency resource (time domain resource and / or frequency domain resource) and the time domain resource (time domain resource and / or frequency domain resource) for receiving the signal can be determined through the first information. In addition, the second device can start receiving the first signal from the first time unit in which the M time domain symbols are located.

[0215] Optionally, in the case where the second information further indicates the first time unit in which the time domain symbol carrying the second signal is located, the second device can start receiving the second signal from the first time unit in which the time domain symbol carrying the second signal is located.

[0216] In addition, after receiving the first signal on the M time domain symbols, the second device can obtain the parameters of the first signal (e.g., the length M of the scrambling sequence {w[n]}, the cyclic shift value m, the parameters of the constant modulus zero correlation sequence, etc.) and the parameters of the second signal through the first information, and further use the parameters of the first signal and the parameters of the second signal to obtain the first signal. In this way, the second device can obtain the channel characteristic parameters corresponding to the first signal according to the first signal sent by the first device and the first signal received by the second device on the M time domain symbols, so as to evaluate the channel through which the first signal passes. It should be understood that the first signal received by the second device on the M time domain symbols is the first signal sent by the first device after attenuation through channel transmission, and the first signal obtained by the second device using the parameters of the first signal and the parameters of the second signal is the first signal sent by the first device before channel transmission.

[0217] Similarly, after receiving the second signal on the time-frequency resource (time domain resource and / or frequency domain resource), the second device can obtain the parameters of the second signal through the first information, and further use the parameters of the second signal to obtain the second signal sent by the first device. In this way, the second device can obtain the channel characteristic parameters corresponding to the second signal according to the second signal sent by the first device and the second signal received by the second device on the time-frequency resource (time domain resource and / or frequency domain resource), so as to evaluate the channel through which the second signal passes. It should be understood that the second signal received by the second device on the time-frequency resource is the second signal sent by the first device after attenuation through channel transmission, and the second signal obtained by the second device using the parameters of the second signal is the second signal sent by the first device before channel transmission.

[0218] As a possible implementation, in the communication method shown in FIG. 6, after performing the S602 step, the first device can receive the echo signal of the first signal on the M time domain symbols to sense the zero-speed or low-speed target; or the first device can detect the zero-speed or low-speed target based on the first signal and detect the high-speed target based on the second signal. Therefore, the first device receiving the echo signal of the first signal on the M time domain symbols can include the following cases:

[0219] (1) receiving the echo signal of the first signal on the M time domain symbols of the first time domain resource; and / or,

[0220] (2) receiving the echo signal of the second signal on the second time domain resource; and / or,

[0221] (3) receiving the echo signal of the first signal on the M time domain symbols of the first time domain resource and the first frequency domain resource; and / or,

[0222] (4) receiving, at the second frequency domain resource and on the M time domain symbols of the first time domain resource, an echo signal of the second signal.

[0223] The related descriptions of the first time domain resource, the M time domain symbols, the first signal, the second signal, the second time domain resource, the first frequency domain resource, and the second frequency domain resource are the same as the above, and are not described here.

[0224] Specifically, the first device receives an echo signal of the first signal on the M time domain symbols of the first time domain resource, and coherently accumulates the echo signal of the first signal and the inter-base station interference signal received in the coherent processing time, and further estimates the position and / or speed of the zero-speed or low-speed target. In addition, the first device receives an echo signal of the second signal on the resource for sending the second signal, and coherently accumulates the echo signal of the second signal and the inter-base station interference signal received in the coherent processing time, and further estimates the position and / or speed of the high-speed target. The inter-base station interference signal is described above and is not described here.

[0225] The above mainly introduces the scheme provided by the embodiments of the present application from the perspective of interaction between devices. It can be understood that each device, such as the first device, the second device, etc., contains a hardware structure and / or software module corresponding to the execution of each function in order to achieve the above functions. Those skilled in the art should easily realize that, in combination with the algorithm steps of each example described in the embodiments disclosed herein, the present application can be realized in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0226] The embodiments of the present application can group the functional modules of the first device, the second device, etc. according to the above method examples, for example, each functional module can be grouped according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be realized in the form of hardware or in the form of a software functional module. It should be noted that the grouping of modules in the embodiments of the present application is illustrative, and is only a logical grouping, and there can be another grouping method when actually implemented.

[0227] FIG. 13 shows a structure diagram of a communication device 1300, which can be used to execute the functions of the first device involved in the above embodiments. As a realizable manner, the communication device 1300 shown in FIG. 13 includes a processing unit 1301, a transceiver unit 1302;

[0228] The processing unit 1301 is configured to acquire a first time domain resource, the first time domain resource including M time domain symbols, M being an integer greater than 1; an interval between any two time domain symbols in the M time domain symbols being greater than or equal to 1 time domain symbol. For example, the processing unit 1301 can enable the communication apparatus 1300 to perform S601.

[0229] The transceiver unit 1302 is configured to transmit a first signal on the M time domain symbols; wherein the first signal transmitted on a time domain symbol a in the M time domain symbols is a product of a second signal and an element a in a scrambling sequence; the time domain symbol a is a time domain symbol with an index a in the M time domain symbols; the element a in the scrambling sequence is an element with an index a in the scrambling sequence; a is an integer greater than or equal to 0, and a is an integer less than M; a length of the scrambling sequence is equal to M, and the scrambling sequence is obtained according to a constant modulus zero correlation sequence. For example, the transceiver unit 1302 can enable the communication apparatus 1300 to perform S602.

[0230] For details of the scrambling sequence, the second signal, the constant modulus zero correlation sequence, and the time domain symbol, reference can be made to the descriptions in the above method embodiments.

[0231] Specifically, all the related content of each step of the first device involved in the method embodiments shown in FIG. 6 can be referred to the function description of the corresponding function module, which will not be repeated here. The communication apparatus 1300 is configured to perform the functions of the first device in the communication method shown in FIG. 6, and thus the same effects as the above communication method can be achieved.

[0232] FIG. 14 shows a structure diagram of a communication apparatus 1400, which can be used to perform the functions of the second device involved in the above embodiments. As a possible implementation, the communication apparatus 1400 shown in FIG. 14 includes a transceiver unit 1401;

[0233] The transceiver unit 1401 is configured to receive first information, the first information being used to indicate a first time domain resource, the first time domain resource including M time domain symbols, M being an integer greater than 1; an interval between any two time domain symbols in the M time domain symbols being greater than or equal to 1 time domain symbol.

[0234] The transceiver unit 1401 is further configured to receive a first signal on the M time domain symbols, wherein the first signal received on a time domain symbol a in the M time domain symbols is a product of a second signal and an element a in a scrambling sequence; the time domain symbol a is a time domain symbol with an index a in the M time domain symbols; the element a in the scrambling sequence is an element with an index a in the scrambling sequence; a is an integer greater than or equal to 0, and a is an integer less than M; a length of the scrambling sequence is equal to M, and the scrambling sequence is obtained according to a constant modulus zero correlation sequence. For example, the transceiver unit 1401 can enable the communication apparatus 1400 to perform S602.

[0235] The scrambling sequence, the second signal, the constant modulus zero correlation sequence, the time domain symbol, and the related description of the first information can refer to the description of the method embodiments.

[0236] Specifically, all the related content of each step of the second device in the method embodiment shown in FIG. 6 can be referred to the function description of the corresponding function module, which will not be repeated here. The communication device 1400 is configured to perform the functions of the second device in the communication method shown in FIG. 6, and thus the same effects as the above communication method can be achieved.

[0237] The processing unit mentioned above can be a processing module, a processor or a controller. It can implement or execute various exemplary logical blocks, modules and circuits described in combination with the disclosure. The processor can also be a combination of computing functions, such as one or more microprocessor combinations, DSP and microprocessor combinations, etc. The transceiver unit can be a communication module, a transceiver circuit or a communication interface, etc. Any of the above-mentioned communication devices can also include a storage unit for storing the program code and data of any communication device. The storage unit can be a storage module or a memory. When the processing module is a processor, the communication module is a communication interface, and the storage module is a memory, the communication device 1300 and the communication device 1400 involved in the embodiments of the present application can be a communication device 1500 shown in FIG. 15. For example, the first device and the second device mentioned above can adopt the structure shown in FIG. 15 or include the components shown in FIG. 15. FIG. 15 is a component diagram of a communication device 1500 according to an embodiment of the present application. As shown in FIG. 15, the communication device 1500 can include a processor 1501, and optionally, a communication line 1502 and a communication interface 1503.

[0238] Further, the communication device 1500 can further include a memory 1504. The processor 1501, the memory 1504 and the communication interface 1503 can be connected through the communication line 1502.

[0239] The processor 1501 can be a central processing unit (CPU), a general processor network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD) or any combination thereof. The processor 1501 can also be other communication devices with processing functions, such as circuits, devices or software modules, etc.

[0240] A communication line 1502 is configured to transmit information between components included in the communication device 1500.

[0241] A communication interface 1503 is configured to communicate with other devices or other communication networks. The other communication networks can be an Ethernet, a radio access network (RAN), a wireless local area network (WLAN), or the like. The communication interface 1503 can be a radio frequency module, a transceiver, or any communication device capable of communication. Embodiments of the present application take the communication interface 1503 as a radio frequency module for example, wherein the radio frequency module can include an antenna, a radio frequency circuit, and the like, and the radio frequency circuit can include a radio frequency integrated chip, a power amplifier, and the like.

[0242] A memory 1504 is configured to store instructions. The instructions can be a computer program.

[0243] The memory 1504 can be a read-only memory (ROM) or other types of static storage devices that can store static information and / or instructions, or can be a random access memory (RAM) or other types of dynamic storage devices that can store information and / or instructions, or can be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, a magneto-optical disk storage, a magnetic disk storage medium, or other magnetic storage devices, and the like. The optical disk storage includes a compact disc (CD), a laser disc, an optical disc, a digital versatile disc (DVD), a Blu-ray disc, and the like.

[0244] It should be noted that the memory 1504 can exist independently of the processor 1501, or can be integrated with the processor 1501. The memory 1504 can be configured to store instructions or program codes or some data, and the like. The memory 1504 can be located in the communication device 1500, or can be located outside the communication device 1500, without limitation. The processor 1501 is configured to execute the instructions stored in the memory 1504 to implement the communication method provided by the embodiments described below.

[0245] In an example, the processor 1501 can include one or more CPUs, such as CPU0 and CPU1 in FIG. 15.

[0246] As an optional implementation, the communication apparatus 1500 includes a plurality of processors, for example, in addition to the processor 1501 in FIG. 15, the processor 1507 can also be included.

[0247] As an optional implementation, the communication apparatus 1500 further includes an output device 1505 and an input device 1506. The input device 1506 is a keyboard, a mouse, a microphone, or a joystick, and the output device 1505 is a display screen, a speaker, or the like.

[0248] It should be noted that the communication apparatus 1500 can be a desktop computer, a laptop computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system, or a device having a similar structure to that in FIG. 15. In addition, the constituent structure shown in FIG. 15 does not constitute a limitation on the communication apparatus, and the communication apparatus can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0249] In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0250] The embodiments of the present application further provide a computer readable storage medium. All or part of the flow of the method embodiments can be instructed by a computer program to relevant hardware, and the program can be stored in the computer readable storage medium. When the program is executed, the flow of the method embodiments can be included. The computer readable storage medium can be the communication apparatus of any of the preceding embodiments, such as an internal storage unit including a data transmission end and / or a data receiving end, for example, a hard disk or a memory of the first device or the second device. The computer readable storage medium can also be an external storage device of the communication apparatus, for example, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, and the like. Further, the computer readable storage medium can include both the internal storage unit and the external storage device of the communication apparatus. The computer readable storage medium is used to store the computer program and other programs and data required by the communication apparatus. The computer readable storage medium can also be used to temporarily store data that has been output or will be output.

[0251] It should be understood that the collection, storage, use, processing, transmission, provision and disclosure of user personal information in the technical solutions of the present application comply with relevant legal provisions and do not violate public order and good customs. For example, the processing of user personal information in the technical solutions of the present application is performed with the authorization of the user. The same description is not repeated below.

[0252] It should be noted that the terms "first" and "second" and the like in the specification of the present application, claims and drawings are used to distinguish different objects, and are not used to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0253] It should be understood that in the present application, "at least one" means one or more, "multiple" means two or more, "at least two" means two or three and more, and "and / or" is used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, "A and / or B" can represent three cases: only A, only B and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after it. "At least one of the following" or similar expressions means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b and c can be single or multiple.

[0254] It should be understood that in the embodiments of the present application, "B corresponding to A" means that B is associated with A. For example, B can be determined according to A. It should also be understood that determining B according to A does not mean that B is determined only according to A, but B can also be determined according to A and / or other information. In addition, the "connection" appearing in the embodiments of the present application means direct connection or indirect connection and various connection modes to achieve communication between devices, which is not limited by the embodiments of the present application.

[0255] The "transmit" and "transmission" appearing in the embodiments of the present application refer to bidirectional transmission, including sending and / or receiving actions, unless otherwise specified. Specifically, the "transmit" in the embodiments of the present application includes data sending, data receiving, or data sending and data receiving. Alternatively, the data transmission herein includes uplink and / or downlink data transmission. The data can include channels and / or signals, and the uplink data transmission refers to uplink channel and / or uplink signal transmission, and the downlink data transmission refers to downlink channel and / or downlink signal transmission. The "network" and "system" appearing in the embodiments of the present application refer to the same concept, and the communication system is a communication network.

[0256] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the convenience and brevity of description, only the grouping of the above functional modules is exemplified, and in actual application, the above functions can be completed by different functional modules according to needs, that is, the internal structure of the device is grouped into different functional modules to complete all or part of the functions described above.

[0257] In several embodiments provided in the present application, it should be understood that the disclosed communication device and method can be implemented in other ways. For example, the communication device embodiments described above are only schematic, for example, the grouping of the modules or units is only a logical function grouping, and actual implementation can have another grouping manner, for example, a plurality of units or components can be combined or integrated into another device, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or components shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0258] The units described as separate components can or can not be physically separated, and the components shown as units can be one physical unit or multiple physical units, that is, can be located in one place, or can be distributed to multiple different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0259] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The above integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0260] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application can be embodied in the form of a software product in essence or in the form of a software product that contributes to the prior art or the whole or part of the technical solutions, which is stored in a storage medium and includes a plurality of instructions for causing an apparatus, such as a single-chip microcomputer, a chip, or a processor, to execute all or part of the steps of the method described in the embodiments of the present application. The aforementioned storage medium includes various storage program codes, such as a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk, and an optical disk.

[0261] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A communication method characterized by comprising: The method comprises: acquiring a first time domain resource, the first time domain resource comprising M time domain symbols, M being an integer greater than 1; the interval between any two time domain symbols in the M time domain symbols being greater than or equal to 1 time domain symbol; sending a first signal on the M time domain symbols; wherein the first signal sent on a time domain symbol a in the M time domain symbols is the product of a second signal and an element a in a scrambling sequence; the time domain symbol a is a time domain symbol with index a in the M time domain symbols; the element a in the scrambling sequence is an element with index a in the scrambling sequence; the a is an integer greater than or equal to 0, and the a is an integer less than the M; the length of the scrambling sequence is equal to the M, and the scrambling sequence is obtained according to a constant modulus zero correlation sequence.

2. The method of claim 1, wherein, The scrambling sequence is obtained according to a constant modulus zero correlation sequence, comprising: the scrambling sequence is a sequence obtained by right or left cyclically shifting the constant modulus zero correlation sequence by m bits; the m is an integer greater than or equal to 0, and the m is an integer less than or equal to M-1.

3. The method of claim 1 or 2, wherein the constant modulus zero correlation sequence comprises a Zadoff-Chu sequence.

4. The method according to any one of claims 1 to 3, characterized in that, The element a[n] of the constant modulus zero correlation sequence {a[n]} with index n satisfies: wherein α, β, γ are parameters of the constant modulus zero correlation sequence, the greatest common divisor of 2α and the M is 1, and αM+β is an integer.

5. The method according to any one of claims 1 to 3, characterized in that, The constant modulus zero correlation sequence comprises a Zadoff-Chu sequence, an element d[n] with index n in the Zadoff-Chu sequence {d[n]} satisfies: wherein u is a parameter of the Zadoff-Chu sequence, the greatest common divisor of the u and the M is 1, the u is an integer greater than or equal to 1, and the u is an integer less than or equal to M-1.

6. The method according to any one of claims 1 to 5, characterized in that, The method further comprises: sending the second signal on a second time domain resource, the first time domain resource and the second time domain resource not overlapping.

7. The method according to any one of claims 1 to 5, characterized in that, The sending of the first signal on the M time domain symbols comprises: sending the first signal on a first frequency domain resource and the M time domain symbols; The method further comprises: sending the second signal on a second frequency domain resource and the M time domain symbols; the first frequency domain resource and the second frequency domain resource not overlapping.

8. The method according to any one of claims 1 to 7, characterized in that, The method further comprises: receiving a back echo signal of the first signal on the M time domain symbols; and / or, receiving a back echo signal of the second signal on a second time domain resource; and / or, receiving a back echo signal of the first signal on a first frequency domain resource and the M time domain symbols; and / or, receiving a back echo signal of the second signal on a second frequency domain resource and the M time domain symbols.

9. The method of any one of claims 1-8, wherein the second signal is an orthogonal frequency division multiplexing, OFDM, signal or a discrete Fourier transform spread, DFT-s-OFDM, signal generated based on a specific sequence; the specific sequence comprising any one of a Zadoff-Chu sequence, a pseudo-random sequence, a predefined sequence, and a complex sequence based on quadrature amplitude modulation, QAM; the pseudo-random sequence comprising a GOLD sequence and a maximum length linear feedback shift register m-sequence.

10. The method according to any one of claims 1 to 9, characterized in that, The method further comprises: transmitting first information, the first information being used for indicating at least one of the following: the M, a cyclic shift value m, a parameter of the constant modulus zero correlation sequence, the first time domain resource, a parameter of the second signal, a first frequency domain resource, a second frequency domain resource, a second time domain resource; the first frequency domain resource being used for transmitting the first signal; the second frequency domain resource being used for transmitting the second signal; the second time domain resource being used for transmitting the second signal.

11. The method according to any one of claims 1 to 10, characterized in that, The method further includes: transmitting second information, the second information being used for indicating a first time unit in which the M time domain symbols are located.

12. The method of any of claims 1-11, wherein, a gap between any two adjacent time domain symbols in the M time domain symbols is the same.

13. A method of communication, comprising: The method includes: receiving first information, the first information being used for indicating a first time domain resource, the first time domain resource including the M time domain symbols, the M being an integer greater than 1; a gap between any two time domain symbols in the M time domain symbols being greater than or equal to 1 time domain symbol; receiving a first signal on the M time domain symbols; wherein a first signal received on a time domain symbol a in the M time domain symbols is a product of a second signal and an element a in a scrambling sequence; the time domain symbol a being a time domain symbol with an index a in the M time domain symbols; the element a in the scrambling sequence being an element with an index a in the scrambling sequence; the a being an integer greater than or equal to 0 and less than the M; a length of the scrambling sequence being equal to the M, the scrambling sequence being obtained according to a constant modulus zero correlation sequence.

14. The method of claim 13, wherein, The scrambling sequence is obtained according to a constant modulus zero correlation sequence, including: the scrambling sequence being a sequence obtained by cyclically shifting the constant modulus zero correlation sequence rightward or leftward by m bits; the m being an integer greater than or equal to 0 and less than or equal to the M-1.

15. The method of claim 13 or 14, wherein, the constant modulus zero correlation sequence includes a Zadoff-Chu sequence.

16. The method according to any one of claims 13-15, characterized in that, The element a[n] of the constant modulus zero correlation sequence {a[n]} with index n satisfies: wherein α, β, γ are parameters of the constant modulus zero correlation sequence, a maximum common divisor of 2α and the M is 1, and αM+β is an integer.

17. The method according to any one of claims 13-15, characterized by, The constant modulus zero correlation sequence comprises a Zadoff-Chu sequence, an element d[n] with index n in the Zadoff-Chu sequence {d[n]} satisfies: wherein u is a parameter of the Zadoff-Chu sequence, a maximum common divisor of the u and the M is 1, the u being an integer greater than or equal to 1 and less than or equal to M-1.

18. The method according to any one of claims 13-17, characterized by, The method further includes: receiving the second signal on a second time domain resource, the first time domain resource and the second time domain resource not overlapping.

19. The method according to any one of claims 13-17, characterized by, The receiving the first signal on the M time domain symbols includes: receiving the first signal on a first frequency domain resource and the M time domain symbols; The method further includes: receiving the second signal on a second frequency domain resource and the M time domain symbols; the first frequency domain resource and the second frequency domain resource not overlapping.

20. The method of any of claims 13-19, wherein, The second signal is an orthogonal frequency division multiplexing, OFDM, signal or a discrete Fourier transform spread orthogonal frequency division multiplexing, DFT-s-OFDM, signal generated based on a specific sequence; the specific sequence comprises any one of a Zadoff-Chu sequence, a pseudo-random sequence, a predefined sequence, a complex sequence based on a quadrature amplitude modulation, QAM; the pseudo-random sequence comprises a GOLD sequence and a maximum length linear feedback shift register m-sequence.

21. The method of any one of claims 13-20, wherein, The first information is further used to indicate at least one of the M, a cyclic shift value m, a parameter of the constant amplitude zero correlation sequence, a parameter of the second signal, a first frequency domain resource, a second frequency domain resource, a second time domain resource; the first frequency domain resource is used to receive the first signal; the second frequency domain resource is used to receive the second signal; and the second resource is used to receive the second signal.

22. The method according to any one of claims 13-21, characterized in that, The method further comprises: receiving second information, the second information being used to indicate a first time unit in which the M time domain symbols are located.

23. The method of any one of claims 13-22, wherein, Any two adjacent time domain symbols in the M time domain symbols have a same interval.

24. A communications device, characterized by The communication device is configured to support performing the method of any one of claims 1-12, or the communication device is configured to support performing the method of any one of claims 13-23.

25. A communications device, characterized by The communication device comprises a processor configured to support the communication device to perform the method of any one of claims 1-12, or to perform the method of any one of claims 13-23.

26. A communication system, characterized by The communication system comprises the communication device of claim 24.

27. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1-12, or cause the computer to perform the method of any one of claims 13-23.

28. A computer program product, characterised in that, The computer program product comprises computer instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1-12, or cause the computer to perform the method of any one of claims 13-23.

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