Communication method and related device

Abstract

A communication method and a related device, for use in enabling a first signal sent by a first communication apparatus to be applied in both synchronization of other communication devices and sensing of the first communication apparatus, and capable of improving the resource utilization rate while reducing the sensing implementation complexity, thereby improving the communication efficiency. In the method, when a first communication apparatus sends a first signal for synchronization, the first communication apparatus may receive a second signal for sensing, and the second signal is an echo signal of the first signal. When the first communication apparatus sends the first signal, the first signal would form an echo signal after undergoing collisions (such as at least one of reflection, diffraction or scattering) with various obstacles in the physical space, so that the first communication apparatus can realize sensing on the basis of the echo signal of the first signal.

Description

A communication method and related equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on November 17, 2023, with application number 202311551447.3 and application name “A Communication Method and Related Equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communications, and in particular to a communication method and related equipment. Background Art

[0003] Wireless communication can be a transmission communication between two or more communication nodes without propagating through conductors or cables. The communication nodes generally include network devices and / or terminal devices.

[0004] Currently, in communication systems, after a transmitter sends a signal, a receiver can send feedback based on that signal, enabling the transmitter to detect the receiver based on the feedback. In other words, if multiple communication devices exist in a physical space, one device can detect other devices based on feedback from other devices after sending a signal.

[0005] However, in the above implementation process, the signal sending end relies on the feedback from the signal receiving end to achieve perception, which is relatively cumbersome and complex.

[0006] Summary of the Invention

[0007] The present application provides a communication method and related equipment, which are used to enable a first signal sent by a first communication device to be used for synchronization of other communication devices and for perception of the first communication device. This can reduce the complexity of perception implementation while improving resource utilization to improve communication efficiency.

[0008] A first aspect of the present application provides a communication method, in which a first signal is sent, the first signal is used for synchronization; and a second signal is received, the second signal is an echo signal of the first signal, and the second signal is used for perception.

[0009] The method is applicable to a first communication device, which may be a communication device (such as a terminal device or an access network device), or the first communication device may be a partial component in the communication device (such as a processor, a chip or a chip system, etc.), or the first communication device may also be a logic module or software that can realize all or part of the functions of the communication device, or the first communication device may be a communication perception fusion device (such as a terminal communication perception fusion device or an access network communication perception fusion device).

[0010] Based on the above technical solution, after the first communication device sends the first signal for synchronization, the first communication device can receive the second signal for perception, and the second signal is the echo signal of the first signal. After the first communication device sends the first signal, the first signal will form an echo signal after colliding with various obstacles in the physical space (for example, at least one of reflection, diffraction or scattering), so that the first communication device can achieve perception based on the echo signal of the first signal. Therefore, compared with the implementation method in which the signal sending end depends on the feedback of the signal receiving end to achieve perception, the first communication device achieves perception through the echo signal of the first signal sent by itself, which can reduce the implementation complexity.

[0011] In addition, the first signal sent by the first communication device can be used for synchronization, that is, after other communication devices receive the first signal, the other communication devices can obtain synchronization information (such as time domain synchronization, frequency domain synchronization, etc.) based on the first signal. In other words, after the first communication device sends the first signal, the first communication device can achieve perception based on the echo signal of the first signal, and other communication devices can obtain synchronization information based on the first signal. Therefore, the first signal sent by the first communication device can be used for both synchronization of other communication devices and perception of the first communication device, which can improve resource utilization and thus improve communication efficiency.

[0012] In addition, compared with perception achieved through signals with larger bandwidth and time-based measurements, in the above technical solution, the first signal used for synchronization occupies a smaller bandwidth. Under a certain antenna aperture, more accurate angle measurements can be made based on the first signal, thereby achieving better perception performance with a smaller signal bandwidth.

[0013] It should be understood that the echo signal of a signal (e.g., the echo signal of the first signal) can be understood as the signal formed by the signal transmitted by the transmitting device and colliding with various obstacles in physical space (e.g., at least one of reflection, diffraction, or scattering) before reaching the transmitting device. Accordingly, the echo signal is used for sensing, which can be understood as the echo signal being used to sense (or reflect) one or more of the following: obstacle information for the signal in physical space, transmission channel information formed by collision with obstacles, or transmission path information.

[0014] Optionally, the echo signal may be replaced by other terms, such as reflection signal, perception feedback signal, perception response signal, detection response signal, radar signal, etc.

[0015] Optionally, the echo signal is used for perception (for example, the second signal is the echo signal of the first signal, and the second signal is used for perception). It can be understood that the echo signal is used for one or more of self-perception, positioning, measurement, detection, channel perception, monitoring, tracking, time measurement, distance measurement, angle measurement, speed measurement, Doppler frequency shift measurement, point cloud measurement, or perception feedback.

[0016] Optionally, the perception results obtained from the echo signals used for perception can be applied to various services, such as one or more of environmental perception, target recognition, target location tracking, or target imaging. Environmental perception can include one or more of geographic location, distance, speed, angle, map, posture, scale, imaging, or material perception.

[0017] Optionally, the transmitting beam of the first signal and the receiving beam of the second signal may be the same beam (or adjacent beams). In this way, the success rate of receiving the second signal may be improved.

[0018] In a possible implementation manner of the first aspect, the first communication device receiving the second signal includes: the first communication device receiving the second signal within a first time period.

[0019] Based on the above technical solution, when the first communication device is receiving the second signal, the first communication device can receive the second signal by performing signal detection within a first time period. Since the second signal is an echo signal formed by the collision of the first signal with an obstacle in the physical space, in this way, the first communication device can receive the second signal within a configured or preconfigured first time period, which can avoid the first communication device from continuing to detect the second signal for a long time when the second signal is not received (for example, the transmission loss of the first signal on the transmission path is large, or the obstacle that collides with the first signal is far away, resulting in a small energy of the echo signal, and the first communication device may not successfully detect the second signal). The first time period can be configured to correspond to the distance or range of the perception requirement, so that the first device can perform perception signal detection according to the perception requirement.

[0020] Optionally, when the above technical solution is applied to a half-duplex scenario or mode, the first communication device may not be able to receive and transmit signals in the same time unit. To this end, while the first communication device is receiving the second signal within the first time period, the first communication device does not transmit any signal. In other words, the first time period is not used for signal transmission. Alternatively, in half-duplex mode, the first communication device cannot receive while transmitting and cannot transmit while receiving.

[0021] Optionally, in a scenario or mode where the above technical solution is applied to full-duplex, the first communication device may receive and transmit signals in the same time unit. To this end, the first communication device may transmit signals while receiving the second signal within the first time period. In full-duplex mode, the first communication device may transmit and receive signals on the same frequency, or may transmit and receive signals at different frequencies, such as at different frequencies within the same frequency band or at frequencies in different frequency bands, and simultaneously transmit and receive signals. Generally, in order to avoid co-channel interference, within the first time period, the first communication device may receive the second signal on a certain frequency band and transmit and / or receive other signals on other frequency bands outside the frequency band.

[0022] In a possible implementation manner of the first aspect, the method further includes: the first communication device receiving first configuration information, where the first configuration information is used to configure the first time period.

[0023] Based on the above technical solution, the first communication device can also receive first configuration information for configuring the first time period (that is, the first configuration information includes configuration information for configuring the first time period), so that the first communication device performs reception of the second signal in the first time period based on the configuration of other communication devices (such as the second communication device mentioned later) to improve the reception success rate of the second signal by the first communication device.

[0024] Optionally, the first time period is preconfigured, in this way, configuration overhead can be saved.

[0025] In a possible implementation manner of the first aspect, a time domain position of the time domain resource carrying the first signal is located before the first time period; and a time domain position of the time domain resource carrying the first signal is adjacent to the first time period.

[0026] Based on the above technical solution, the first communication device can, after sending the first signal, perform reception of the second signal in a first time period adjacent to the time domain resource carrying the first signal, so that the solution can be applicable to a half-duplex scenario, that is, the first communication device performs reception of the second signal after sending the first signal.

[0027] Optionally, the time domain position of the time domain resource carrying the first signal is adjacent to the first time period, that is, the first communication device receives the second signal at an adjacent time domain position after sending the first signal. Since the transmission delay of the echo signal is positively correlated with the length or distance of the perception distance, the first communication device can receive the second signal in a shorter time after sending the first signal, so that the solution can be applied to scenarios with a shorter perception (or detection) distance.

[0028] Optionally, the above technical solution is applied to a full-duplex scenario or mode, and the first communication device can perform reception of the second signal while sending the first signal. In other words, the time domain position of the time domain resource carrying the first signal can be located before the first time period, or the time domain position of the time domain resource carrying the first signal can partially overlap or completely overlap with the first time period, which is not limited here. The start and end time of the first time period depends on the distance requirement of the perception detection. Since the first time period can overlap with the sending time of the first signal in the full-duplex mode, the solution can be applied to scenarios with shorter perception (or detection) distances.

[0029] It should be understood that the resource position of one resource being before or after the resource position of another resource may be a before-after relationship in the time domain. For example, if the resource position of one resource is before the resource position of another resource, it can be understood that the resource index of the one resource is less than the resource index of the other resource. Correspondingly, if the resource position of one resource is after the resource position of another resource, it can be understood that the resource index of the one resource is greater than the resource index of the other resource.

[0030] In a possible implementation manner of the first aspect, the first time period includes time resources for a guard period (GP).

[0031] Based on the above technical solution, the time resources for receiving the first time period may include GP. In this way, the solution can be applied to a half-duplex scenario, and the first communication device can perform transceiver conversion within the GP time interval to improve the reception success rate of the first communication device receiving the second signal.

[0032] Optionally, when the first time period includes GP time resources, the GP time resources may be one or more time units that are continuous in the time domain, and the time domain starting position of the one or more time units is the same as the time domain starting position of the first time period. In this way, resource utilization can be improved.

[0033] In a possible implementation manner of the first aspect, a time domain position of the time domain resource carrying the first signal is located before the first time period; and a time domain position of the time domain resource carrying the first signal is not adjacent to the first time period.

[0034] Based on the above technical solution, the first communication device can, after sending the first signal, perform reception of the second signal in a first time period that is not adjacent to the time domain resource carrying the first signal, so that the solution can be applicable to a half-duplex scenario, that is, the first communication device performs reception of the second signal after sending the first signal.

[0035] Optionally, the time domain position of the time domain resource carrying the first signal is not adjacent to the first time period, that is, the first communication device receives the second signal at a non-adjacent time domain position a certain time after sending the first signal. Since the transmission delay of the echo signal is positively correlated with the length or distance of the perception distance, for this reason, the first communication device can realize the implementation method of receiving the second signal within a longer time after sending the first signal, which enables the solution to be applied to scenarios with longer perception (or detection) distances.

[0036] In a possible implementation manner of the first aspect, a time interval between a time domain position of a time domain resource carrying the first signal and the first time period is GP.

[0037] Based on the above technical solution, the time interval between the time domain position of the time domain resource carrying the first signal and the first time period is GP. In this way, the solution can be applied to a half-duplex scenario, and the first communication device can perform transmit-receive conversion within the GP time interval to improve the reception success rate of the first communication device receiving the second signal.

[0038] In a possible implementation of the first aspect, the first signal includes a secondary synchronization signal (SSS) in a signal block; wherein the signal block is carried in N time units, and the first signal is carried in the last time unit of the N time units, where N is an integer greater than or equal to 1.

[0039] Optionally, in the N time periods (or the M time units mentioned later), each time unit may be one or more symbols, one or more mini-slots, one or more time slots, one or more subframes, one or more frames, etc.

[0040] Based on the above technical solution, the first signal may include the SSS, allowing the receiver of the first signal (e.g., the third communication device described below) to obtain the synchronization information carried by the SSS based on the SSS. Furthermore, the first signal may be carried in the last time unit of the N time units. In this way, the first communication device can subsequently receive the second signal in the first time period after the N time units.

[0041] Optionally, the signal block may be a signal block for synchronization and / or a signal block for sensing. For example, the name of the signal block may be a sensing signal block (SEB), a synchronization signal block, a synchronization signal / physical broadcast channel block (SS / PBCH block) (or denoted as SS / PBCH, SSB, etc.), a sidelink synchronization signal / physical broadcast channel block (sidelink SSB, SL-SSB, or S-SS / PSBCH block), a sidelink signal block, a sidelink sensing signal block (SEB), or other names.

[0042] Optionally, the secondary synchronization signal SSS involved in the present application can be used to carry secondary synchronization information, and is used for at least one of time domain synchronization or frequency domain synchronization during the synchronization process. Exemplarily, the cell identifier or synchronization identifier is obtained by combining the SSS and the PSS. The SSS is usually composed of a specific sequence that occupies certain time-frequency resources and has a certain length. The SSS sequence is usually composed of a sequence with good autocorrelation and cross-correlation characteristics, such as a gold sequence, etc., to facilitate detection. Usually, the bandwidth corresponding to the SSS is a smaller bandwidth, such as 127 resource elements, so that various terminal devices in the system have the ability to detect the bandwidth.

[0043] In a possible implementation manner of the first aspect, the signal block further includes a primary synchronization signal (PSS), and the PSS is carried in the first time unit of the N time units.

[0044] Based on the above technical solution, the signal block sent by the first communication device may also include a PSS, so that the receiver of the first signal (for example, the third communication device described later) can obtain the synchronization information carried by the PSS based on the PSS. In addition, the PSS can be carried in the first time unit of the N time units. In this way, in addition to being able to obtain the synchronization information carried by the PSS based on the PSS, the receiver of the signal block can also parse other information of the signal block (for example, SSS and / or PBCH) based on the synchronization information carried by the PSS to improve the success rate of receiving the other information.

[0045] Optionally, the PSS involved in this application, i.e. the primary synchronization signal, can be used to carry primary synchronization information, and be used for time domain synchronization and frequency domain synchronization during the synchronization process. Exemplarily, the PSS carries part of the cell identification (ID) information, and the cell identification or synchronization identification can be obtained by combining with the SSS. The PSS is usually the first signal for the initial detection of the terminal device entering the system, and is usually composed of a specific sequence that occupies certain time-frequency resources and has a certain length. The SSS sequence is usually composed of a sequence with good autocorrelation and cross-correlation characteristics, such as an M sequence, etc., to facilitate detection. Usually, the bandwidth corresponding to the PSS is a smaller bandwidth such as 127 resource elements so that various terminal devices in the system have the ability to detect the bandwidth.

[0046] In a possible implementation of the first aspect, the signal block also includes a physical broadcast channel (PBCH) (or part of the information of the signal block is carried by the PBCH), and the PBCH is carried in the remaining N-1 time units of the N time units except the first time unit.

[0047] Based on the above technical solution, the signal block sent by the first communication device may further include a PBCH, so that the receiver of the first signal (e.g., the third communication device described below) can obtain information carried by the PBCH based on the PBCH. Furthermore, the PBCH is carried in the remaining N-1 time units of the N time units, excluding the first time unit. This allows for the use of as many time units as possible to carry the PBCH, thereby carrying more information.

[0048] Optionally, the PBCH involved in this application can be used to carry the most necessary information for initial access to the system. Exemplarily, the PBCH may include (or the information carried by the PBCH includes) at least one of the system frame number, the initial subcarrier spacing (for subsequent system messages, random access responses, and paging), the subcarrier offset of the SSB, the demodulation pilot position, the control channel configuration for scheduling system information, cell barring information, the SSB index, or a half-frame indication.

[0049] In a possible implementation manner of the first aspect, the first signal further includes a PSS in the signal block, and the PSS is carried in the last time unit of the N time units.

[0050] Based on the above technical solution, the first signal sent by the first communication device can also include the PSS in the signal block, that is, the second signal includes both the echo signal of the PSS and the echo signal of the SSS. In this way, the first communication device can obtain as many echo signals as possible to improve the perception performance.

[0051] In a possible implementation manner of the first aspect, the signal block further includes a PBCH, and the PBCH is carried in the N time units.

[0052] Based on the above technical solution, when the first signal sent by the first communication device includes PSS and SSS in the signal block, the signal block may also include PBCH, and the PBCH is carried in the N time units, so that as many time units as possible can be used to carry PBCH to carry more information.

[0053] In a possible implementation of the first aspect, the first signal includes a PSS in a signal block, the signal block includes N time units, the first signal is carried in the first time unit of the N time units, N is an integer greater than 1; the first time period is located between the first time unit and other N-1 time units in the N units.

[0054] Based on the above technical solution, the first signal may include a PSS, so that the receiver of the first signal (such as the third communication device described later) can obtain the synchronization information carried by the PSS based on the PSS. In addition, the first signal may be carried in the first time unit of the N time units. In addition, the first time period is located between the first time unit and the other N-1 time units in the N units. In this way, the subsequent first communication device can receive the second signal through the first time period after the first time unit.

[0055] In a possible implementation manner of the first aspect, the other N-1 time units are used to carry the SSS in the signal block; or, the other N-1 time units are used to carry the SSS in the signal block and information in the PBCH.

[0056] Based on the above technical solution, the signal block sent by the first communication device may include SSS (or SSS and PBCH) in addition to PSS. In this way, the receiver of the signal block can obtain more synchronization information (or synchronization information and system information) through SSS (or SSS and PBCH).

[0057] In a possible implementation of the first aspect, the first signal and the second signal are carried in M ​​time units, where M is an integer greater than or equal to 1; wherein, N time units among the M time units are used to carry signal blocks, the starting time unit of the M time units and the starting time unit of the N time units are the same time unit, and M is greater than N.

[0058] Based on the above technical solution, the first signal sent by the first communication device and the second signal received by the first communication device can be carried in M ​​time units, that is, the first communication device can complete the transmission and perception of the synchronization signal within the M time units. In addition, N time units of the M time units are used to carry signal blocks, and the starting time unit of the M time units is the same as the starting time unit of the N time units, so that the receiver of the signal block can obtain the synchronization information carried by the signal block as early as possible within the M time units.

[0059] In a possible implementation of the first aspect, the N time units are continuous time units in the time domain; among the M time units, the other MN time units located after the N time units are used to carry the second signal (that is, the other MN time units are the first time period for receiving the second signal); or, among the M time units, the other MN time units located after the N time units are used to carry the GP and the second signal (that is, some of the other MN time units are the first time period for receiving the second signal), and the time domain resources carrying the GP are adjacent to the N time units; or, among the M time units, P time units adjacent to the N time units are used to carry the GP, and MNP time units located after the P time units are used to carry the second signal (that is, the MNP time units are the first time period for receiving the second signal), and P is a positive integer.

[0060] Based on the above technical solution, when the N time units are continuous time units in the time domain, the M time units can be implemented through the above multiple methods to improve the flexibility of the solution implementation.

[0061] In a possible implementation manner of the first aspect, the first signal includes an SSS, and the SSS is carried in the last time unit of the N time units.

[0062] Based on the above technical solution, the first signal may include the SSS, allowing the receiver of the first signal (e.g., the third communication device described below) to obtain the synchronization information carried by the SSS based on the SSS. Furthermore, the first signal may be carried in the last time unit of the N time units. In this way, the first communication device can subsequently receive the second signal in the first time period after the N time units.

[0063] In a possible implementation of the first aspect, the SSS is included in a signal block, which also includes a PSS; the PSS is carried in the first time unit of the N time units, or the PSS is carried in the last time unit of the N time units.

[0064] Based on the above technical solution, the signal block sent by the first communication device may also include a PSS, so that the receiver of the first signal (such as the third communication device described later) can obtain the synchronization information carried by the PSS based on the PSS. Moreover, the PSS can be carried in the first time unit of the N time units. In this way, in addition to being able to obtain the synchronization information carried by the PSS based on the PSS, the receiver of the signal block can also parse other information of the signal block (such as SSS and / or PBCH) based on the synchronization information carried by the PSS to improve the success rate of receiving other information. In addition, the PSS can also be carried in the last time unit of the N time units to improve the flexibility of the implementation of the solution.

[0065] In a possible implementation of the first aspect, the signal block also includes a PBCH; the PSS in the signal block is carried in the first time unit of the N time units, and the PBCH is carried in the remaining N-1 time units of the N time units except the first time unit; or, the PSS in the signal block is carried in the last time unit of the N time units, and the PBCH is carried in the N time units.

[0066] Based on the above technical solution, when the first signal sent by the first communication device includes PSS and SSS in a signal block, the signal block may also include PBCH, and the PBCH is carried in N-1 time units or N time units, so that as many time units as possible can be used to carry PBCH to carry more information.

[0067] In a possible implementation of the first aspect, the N time units include k time units and Nk time units, the k time units are continuous time units in the time domain, the Nk time units are continuous time units in the time domain, the start time unit of the k time units and the start time unit of the M time units are the same time unit, the end time unit of the Nk time units and the end time unit of the M time units are the same time unit, and k is a positive integer; in the M time units, MN time units other than the N time units are used to carry the second signal (i.e., the first time period); or, in the M time units, MN time units other than the N time units are used to carry the GP and the second signal (i.e., the first time period), and the time domain resources carrying the GP are adjacent to the k time units; or, in the M time units, P time units adjacent to the k time unit are used to carry the GP, and MNP time units located after the P time units are used to carry the second signal (i.e., the first time period), and P is a positive integer.

[0068] Based on the above technical solution, the N time units used to carry signal blocks can include two time units that are continuous in the time domain, and the M time units can also carry GP through the above-mentioned multiple methods, so that the solution can be applied to half-duplex scenarios, and the first communication device can perform transmit-receive conversion within the GP time interval to improve the reception success rate of the first communication device receiving the second signal.

[0069] In a possible implementation of the first aspect, the first signal includes a PSS in a signal block; the SSS in the signal block is carried in the first time unit of the Nk time units, and the PBCH in the signal block is carried in the N time units.

[0070] Based on the above technical solution, the first signal may further include a PSS in a signal block, and the SSS in the signal block is carried in the first time unit of the Nk time units, and the PBCH in the signal block is carried in the N time units. In this way, the first communication device can achieve perception in two consecutive time units in the time domain, thereby improving perception performance.

[0071] In a possible implementation of the first aspect, the first signal includes the PSS and SSS in the signal block, and the second signal includes the echo signal of the PSS and the echo signal of the SSS; wherein, the time domain position of the time domain resource carrying the PSS is located before the time domain position of the time domain resource used to carry the echo signal of the PSS in the first time period, and the time domain position of the time domain resource carrying the SSS is located before the time domain position of the time domain resource used to carry the echo signal of the SSS in the first time period.

[0072] Based on the above technical solution, the first signal may include the PSS and SSS in the signal block. Accordingly, the second signal, serving as an echo signal of the first signal, may include the echo signal of the PSS and the echo signal of the SSS. In this way, the first communication device achieves perception in two consecutive time units in the time domain, thereby improving perception performance.

[0073] It should be understood that the first communication device can receive the second signal within the first time period. When the second signal may include the echo signal of the PSS and the echo signal of the SSS, the first communication device can respectively realize the reception of these two echo signals in two time units that are consecutive in the time domain.

[0074] In a possible implementation manner of the first aspect, a time domain position of a time domain resource used to carry the echo signal of the PSS in the first time period is located before a time domain position of a time domain resource carrying the SSS.

[0075] Based on the above technical solution, the first communication device can send SSS after receiving the echo signal of PSS. In this way, the receiver of the first signal (such as the third communication device described later) can obtain PSS and then receive SSS based on PSS, which can improve the success rate of SSS reception.

[0076] In a possible implementation of the first aspect, the signal block also includes a PBCH; the time domain resources of the PBCH include at least one of the following: the time domain resources carrying the PSS, the time domain position of the time domain resources carrying the SSS, one or more time units before the time domain position of the time domain resources carrying the PSS, and one or more time units after the time domain position of the time domain resources carrying the SSS. Based on the above technical solution, the signal block sent by the first communication device may also include a PBCH, so that the recipient of the first signal (such as the third communication device described later) can obtain the system information carried by the PBCH based on the PBCH. In addition, the PBCH can be carried by at least one of the above resources, which can improve the flexibility of the solution implementation.

[0077] In a possible implementation of the first aspect, the signal block is one of the signal blocks in a signal block set; the method also includes receiving second configuration information, the second configuration information is used to configure the signal block set, and the second configuration information includes at least one of the following: information for determining the time domain resources of the signal block set, information for determining the frequency domain resources of the signal block set, subcarrier spacing (SCS) configuration information, cyclic prefix (CP) configuration information, configuration information of the first time period, transmitting beam information for sending the signal blocks in the signal block set, or receiving beam information for echo signals of part or all of the signals in the signal blocks in the signal block set.

[0078] Based on the above technical solution, the first communication device can send signal blocks based on the second configuration information, wherein some or all of the signal blocks in the signal block set can carry the first signal. In this way, multiple perceptions can be achieved through the transmission of multiple signal blocks to improve the perception performance.

[0079] In addition, different signal blocks in the signal block set can be sent through different communication beams. To this end, the first communication device can realize perception in different beam directions based on the perception of different signal blocks sent by different communication beams to enhance high-precision perception.

[0080] In this application, the signal block set (set) can be replaced by other terms, for example, signal block burst (burst), signal block burst set (burst set), etc.

[0081] In a possible implementation manner of the first aspect, in the signal block set, an interval between the signal block and an adjacent signal block is greater than 4 symbols.

[0082] Based on the above technical solution, in the signal block set, the interval between the signal block and the adjacent signal block is greater than 4 symbols. Compared with the traditional interval of 4 symbols between different SSBs, the configuration of the first time period can be achieved through a larger time interval, so as to achieve perception through the second signal received in the first time period, reduce interference in the perception process, and realize perception in a half-duplex scenario or mode.

[0083] In a possible implementation of the first aspect, a subcarrier spacing of a signal block in the signal block set is 30 kHz, and a starting symbol index X of a signal block in the signal block set satisfies: X={2, 8, 16, 22}+28*n, n=0 or 0, 1; or, X={4, 16}+28*nn=0, 1 or 0, 1, 2, 3;

[0084] The subcarrier spacing of the signal blocks in the signal block set is 120 kHz, and the starting symbol index X of the signal blocks in the signal block set satisfies: X = {2, 8, 16, 22} + 28*n, n = 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18;

[0085] The subcarrier spacing of the signal blocks in the signal block set is 240 kHz, and the starting symbol index X of the signal blocks in the signal block set satisfies: X = {8, 16, 32, 40} + 56*n, n = 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18; or, X = {x1, x2, x3, x4} + 56*n, n = 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18; or, X = {6, 12, 18, 24, 32, 38, 44, 50} + 56*n, n = 0, 1, 2, 3, 5, 6, 7, 8; or, {2,8,16,22,30,36,44,50}+56*n,n=0,1,2,3,5,6,7,8;

[0086] Among them, x1, x2, x3, and x4 are 4 numbers selected from the set {8, 12, 16, 20, 32, 36, 40, 44} from small to large.

[0087] Based on the above technical solution, in the signal block set, the starting symbol indexes of different signal blocks meet one or more of the above conditions. In this way, the configuration of the first time period can be achieved through a larger time interval, so as to achieve perception through the second signal received in the first time period, reduce interference in the perception process, and achieve perception in a half-duplex scenario or mode.

[0088] In a possible implementation of the first aspect, the method also includes: the first communication device receives third configuration information, the third configuration information including at least one of the following: configuration information of the SCS of the first signal, configuration information of the time domain resources carrying the first signal, configuration information of the CP length, configuration information of the GP length, configuration information of the time domain resources carrying the first signal and the second signal, and configuration information for configuring the first time period.

[0089] Based on the above technical solution, the first communication device can also receive third configuration information, and execute the sending of the first signal and the receiving of the second signal based on the third configuration information to realize the above perception process.

[0090] Optionally, the third configuration information and at least two of the configuration information from the first configuration information and the configuration information of the signal block set described above may be carried in the same configuration message or in different configuration messages, which is not limited here. It should be understood that when the at least two configuration information are carried in the same configuration message, the same configuration information may be carried in one copy. For example, when the at least two configuration information include the first configuration information and the third configuration information, both the first configuration information and the third configuration information may include configuration information for configuring the first time period. Accordingly, the same configuration message may carry one copy of the configuration information for the first time period.

[0091] The second aspect of the present application provides a communication method, in which first configuration information is determined, and the first configuration information is used to configure a first time period; wherein the first time period is used to receive a second signal, the second signal is an echo signal of the first signal, the first signal is used for synchronization, and the second signal is used for perception; and the first configuration information is sent.

[0092] The method is applicable to a second communication device, which may be a communication device (for example, when the first communication device is a terminal device, the communication device may be an access network device or a core network device; for example, when the first communication device is an access network device, the communication device may be a core network device), or the second communication device may be a partial component in the communication device (for example, a processor, a chip or a chip system, etc.), or the second communication device may also be a logic module or software that can realize all or part of the functions of the communication device.

[0093] Based on the above technical solution, the second communication device can send first configuration information for configuring a first time period. The first time period is used to receive a second signal, the second signal is an echo signal of the first signal, the first signal is used for synchronization, and the second signal is used for perception. In other words, after the recipient of the first configuration information (e.g., the first communication device) receives the first configuration information, the first communication device can send the first signal. After the first signal collides with various obstacles in the physical space (e.g., at least one of reflection, diffraction, or scattering), an echo signal is formed, so that the first communication device can receive the echo signal of the first signal based on the first configuration information to achieve perception. Therefore, compared to the implementation method in which the signal sending end relies on the feedback of the signal receiving end to achieve perception, the first communication device can achieve perception through the echo signal of the first signal sent by itself by sending the first configuration information, which can reduce the implementation complexity.

[0094] In addition, the first signal sent by the first communication device can be used for synchronization, that is, after other communication devices receive the first signal, the other communication devices can obtain synchronization information (such as time domain synchronization, frequency domain synchronization, etc.) based on the first signal. In other words, after the first communication device sends the first signal, the first communication device can achieve perception based on the echo signal of the first signal, and other communication devices can obtain synchronization information based on the first signal. Therefore, the first signal sent by the first communication device can be used for both synchronization of other communication devices and perception of the first communication device, which can improve resource utilization and thus improve communication efficiency.

[0095] A third aspect of the present application provides a communication method, in which second configuration information is determined, and the second configuration information is used to configure the signal block set; wherein at least one signal block in the signal block set includes a first signal, the first signal is used for synchronization, the echo signal of the first signal is a second signal, and the second signal is used for perception; and the second configuration information is sent.

[0096] The method is applicable to a second communication device, which may be a communication device (for example, when the first communication device is a terminal device, the communication device may be an access network device or a core network device; for example, when the first communication device is an access network device, the communication device may be a core network device), or the second communication device may be a partial component in the communication device (for example, a processor, a chip or a chip system, etc.), or the second communication device may also be a logic module or software that can realize all or part of the functions of the communication device.

[0097] Based on the above technical solution, the second configuration information sent by the second communication device is used to configure the signal block set. At least one signal block in the signal block set includes a first signal, the first signal is used for synchronization, the echo signal of the first signal is a second signal, and the second signal is used for perception. In other words, after the receiver of the second configuration information (such as the first communication device) receives the second configuration information, the first communication device sends a signal block containing the first signal based on the second configuration information. After the first signal collides with various obstacles in the physical space (such as at least one of reflection, diffraction or scattering), an echo signal is formed, so that the first communication device can receive the echo signal of the first signal to achieve perception. Therefore, compared with the implementation method in which the signal sending end relies on the feedback of the signal receiving end to achieve perception, the first communication device can achieve perception through the echo signal of the first signal sent by itself by sending the second configuration information, which can reduce the implementation complexity.

[0098] In addition, the first signal sent by the first communication device can be used for synchronization, that is, after other communication devices receive the first signal, the other communication devices can obtain synchronization information (such as time domain synchronization, frequency domain synchronization, etc.) based on the first signal. In other words, after the first communication device sends the first signal, the first communication device can achieve perception based on the echo signal of the first signal, and other communication devices can obtain synchronization information based on the first signal. Therefore, the first signal sent by the first communication device can be used for both synchronization of other communication devices and perception of the first communication device, which can improve resource utilization and thus improve communication efficiency.

[0099] In addition, the first communication device can send signal blocks based on the second configuration information, wherein some or all of the signal blocks in the signal block set can carry the first signal. In this way, multiple perceptions can be achieved through the transmission of multiple signal blocks to improve perception performance.

[0100] In addition, different signal blocks in the signal block set can be sent through different communication beams. To this end, the first communication device can realize perception in different beam directions based on the perception of different signal blocks sent by different communication beams to enhance high-precision perception.

[0101] Optionally, the second configuration information includes at least one of the following: information for determining the time domain resources of the signal block set, information for determining the frequency domain resources of the signal block set, subcarrier spacing SCS configuration information, cyclic prefix CP configuration information, configuration information for the first time period for receiving the second signal, transmitting beam information for sending the signal blocks in the signal block set, or receiving beam information for the echo signals of part or all of the signals in the signal blocks in the signal block set.

[0102] The fourth aspect of the present application provides a communication method, in which third configuration information is determined, and the third configuration information is used to configure a first signal and / or a second signal; wherein the first signal is used for synchronization, the second signal is used for perception, and the second signal is an echo signal of the first signal; and the third configuration information is sent.

[0103] The method is applicable to a second communication device, which may be a communication device (for example, when the first communication device is a terminal device, the communication device may be an access network device or a core network device; for example, when the first communication device is an access network device, the communication device may be a core network device), or the second communication device may be a partial component in the communication device (for example, a processor, a chip or a chip system, etc.), or the second communication device may also be a logic module or software that can realize all or part of the functions of the communication device.

[0104] Based on the above technical solution, the third configuration information sent by the second communication device is used to configure the first signal and / or the second signal, wherein the first signal is used for synchronization, the second signal is used for perception, and the second signal is the echo signal of the first signal. In other words, after the recipient of the third configuration information (such as the first communication device) receives the third configuration information, after the first communication device sends a signal block containing the first signal, the first signal will form an echo signal after colliding with various obstacles in the physical space (such as at least one of reflection, diffraction or scattering), so that the first communication device can receive the echo signal of the first signal to achieve perception. Therefore, compared with the implementation method in which the signal sending end depends on the feedback of the signal receiving end to achieve perception, the first communication device can achieve perception through the echo signal of the first signal sent by itself by sending the third configuration information, which can reduce the implementation complexity.

[0105] In addition, the first signal sent by the first communication device can be used for synchronization, that is, after other communication devices receive the first signal, the other communication devices can obtain synchronization information (such as time domain synchronization, frequency domain synchronization, etc.) based on the first signal. In other words, after the first communication device sends the first signal, the first communication device can achieve perception based on the echo signal of the first signal, and other communication devices can obtain synchronization information based on the first signal. Therefore, the first signal sent by the first communication device can be used for both synchronization of other communication devices and perception of the first communication device, which can improve resource utilization and thus improve communication efficiency.

[0106] Optionally, the third configuration information includes at least one of the following: configuration information of the subcarrier spacing SCS of the first signal, configuration information of the time domain resources carrying the first signal, configuration information of the CP length, configuration information of the GP length, configuration information of the time domain resources carrying the first signal and the second signal, and configuration information for configuring the first time period.

[0107] The fifth aspect of the present application provides a communication method, in which the PSS in the signal block is received in the second time period, and the first signal is used for synchronization; in the second time period, the SSS and / or PBCH in the signal block are received based on the PSS; wherein the echo signal of the PSS and / or SSS is used for perception.

[0108] This method is applicable to a third communication device, which may be a communication device (for example, when the first communication device is a terminal device, the communication device may be a terminal device; for example, when the first communication device is an access network device, the communication device may be a terminal device), or the third communication device may be a partial component in the communication device (for example, a processor, a chip or a chip system, etc.), or the third communication device may also be a logic module or software that can realize all or part of the functions of the communication device.

[0109] Based on the above technical solution, after the third communication device receives the PSS in the signal block in the second time period, the third communication device receives the SSS and / or PBCH in the signal block based on the PSS, and the echo signal of the PSS and / or SSS is used for the sender of the signal block (such as the first communication device) to achieve perception. In other words, after the first communication device sends the first signal, the first signal will form an echo signal after colliding with various obstacles in the physical space (such as at least one of reflection, diffraction or scattering), so that the first communication device can achieve perception based on the echo signal of the first signal. Therefore, compared with the implementation method in which the signal sending end relies on the feedback of the signal receiving end to achieve perception, the first communication device achieves perception through the echo signal of the first signal sent by itself, which can reduce the implementation complexity.

[0110] In addition, the first signal sent by the first communication device can be used for synchronization, that is, after other communication devices receive the first signal, the other communication devices can obtain synchronization information (such as time domain synchronization, frequency domain synchronization, etc.) based on the first signal. In other words, after the first communication device sends the first signal, the first communication device can achieve perception based on the echo signal of the first signal, and other communication devices can obtain synchronization information based on the first signal. Therefore, the first signal sent by the first communication device can be used for both synchronization of other communication devices and perception of the first communication device, which can improve resource utilization and thus improve communication efficiency.

[0111] It should be noted that, for one or more of the PSS, SSS or PBCH in the signal block, reference can be made to the description of the first aspect and its related implementation methods.

[0112] Optionally, the third communication device may receive one or more of the first configuration information, the second configuration information, or the third configuration information, and receive information in the signal block based on the one or more configuration information. The implementation of these configuration information may refer to the description of the first aspect and its related implementation methods.

[0113] In a possible implementation of the fifth aspect, within the second time period, the third communication device receives the SSS and / or PBCH in the signal block based on the PSS, including: within the second time period, the third communication device blindly detects the SSS and / or PBCH in the signal block based on the PSS.

[0114] Based on the above technical solution, within the second time period, after the third communication device receives the PSS in the signal block, since the SSS and / or PBCH in the signal block have multiple positional relationships, the third communication device can perform blind detection on the SSS and / or PBCH in the signal block based on the information obtained from the PSS to obtain the SSS and / or PBCH in the signal block.

[0115] In a possible implementation of the fifth aspect, within the second time period, the time domain position relationship between the PSS and the SSS is determined by first information, and / or the time domain position relationship between the PSS and the SSS is determined by second information.

[0116] Based on the above technical solution, the third communication device can receive the SSS and / or PBCH based on the first information and / or the second information, so as to improve the success rate of the third communication device in receiving the SSS and / or PBCH.

[0117] In a possible implementation manner of the fifth aspect, the PSS includes the first information and / or the second information.

[0118] Based on the above technical solution, the third communication device can obtain the first information and / or the second information through the PSS, and further receive the SSS and / or PBCH based on the time domain position relationship determined by the first information and / or the second information.

[0119] Optionally, the first information and / or the second information may be carried in other information, such as one or more of the first configuration information, the second configuration information or the third configuration information.

[0120] In a possible implementation manner of the fifth aspect, the first signal is included in a signal block in a signal block set;

[0121] The subcarrier spacing of the signal blocks in the signal block set is 30 kHz, and the starting symbol index X of the signal blocks in the signal block set satisfies: X = {2, 8, 16, 22} + 28*n, n = 0 or 0, 1; or, X = {4, 16} + 28*nn = 0, 1 or 0, 1, 2, 3;

[0122] The subcarrier spacing of the signal blocks in the signal block set is 120 kHz, and the starting symbol index X of the signal blocks in the signal block set satisfies: X = {2, 8, 16, 22} + 28*n, n = 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18;

[0123] The subcarrier spacing of the signal blocks in the signal block set is 240 kHz, and the starting symbol index X of the signal blocks in the signal block set satisfies: X = {8, 16, 32, 40} + 56*n, n = 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18; or, X = {x1, x2, x3, x4} + 56*n, n = 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18; or, X = {6, 12, 18, 24, 32, 38, 44, 50} + 56*n, n = 0, 1, 2, 3, 5, 6, 7, 8; or, {2,8,16,22,30,36,44,50}+56*n,n=0,1,2,3,5,6,7,8;

[0124] Among them, x1, x2, x3, and x4 are 4 numbers selected from the set {8, 12, 16, 20, 32, 36, 40, 44} from small to large.

[0125] Based on the above technical solution, in the signal block set, the starting symbol indexes of different signal blocks meet one or more of the above conditions. In this way, the configuration of the first time period can be achieved through a larger time interval, so as to achieve perception through the second signal received in the first time period, reduce interference in the perception process, and achieve perception in a half-duplex scenario or mode.

[0126] In the sixth aspect of the present application, a communication device is provided, which is a first communication device, and the device includes a transceiver unit and a processing unit; the processing unit is used to determine a first signal, the transceiver unit is used to send the first signal, and the first signal is used for synchronization; the transceiver unit is also used to receive a second signal, which is an echo signal of the first signal, and the second signal is used for perception.

[0127] In the sixth aspect of the present application, the constituent modules of the communication device can also be used to execute the steps performed in each possible implementation method of the first aspect and achieve corresponding technical effects. For details, please refer to the first aspect and will not be repeated here.

[0128] In the seventh aspect of the present application, a communication device is provided, which is a second communication device. The device includes a transceiver unit and a processing unit. The processing unit is used to determine first configuration information, and the first configuration information is used to configure a first time period; wherein the first time period is used to receive a second signal, the second signal is an echo signal of the first signal, the first signal is used for synchronization, and the second signal is used for perception; the transceiver unit is used to send the first configuration information.

[0129] In the seventh aspect of the present application, the constituent modules of the communication device can also be used to execute the steps performed in each possible implementation method of the second aspect and achieve corresponding technical effects. For details, please refer to the second aspect and will not be repeated here.

[0130] In an eighth aspect of the present application, a communication device is provided, which is a second communication device, and includes a transceiver unit and a processing unit; the processing unit is used to determine second configuration information, and the second configuration information is used to configure the signal block set; wherein, at least one signal block in the signal block set includes a first signal, the first signal is used for synchronization, the echo signal of the first signal is a second signal, and the second signal is used for perception; the transceiver unit is used to send the second configuration information.

[0131] In the eighth aspect of the present application, the constituent modules of the communication device can also be used to execute the steps performed in each possible implementation method of the third aspect and achieve corresponding technical effects. For details, please refer to the third aspect and will not be repeated here.

[0132] In the ninth aspect of the present application, a communication device is provided, which is a second communication device, and the device includes a transceiver unit and a processing unit; the processing unit is used to determine third configuration information, and the third configuration information is used to configure the first signal and / or the second signal; wherein the first signal is used for synchronization, the second signal is used for perception, and the second signal is an echo signal of the first signal; the transceiver unit is used to send the third configuration information.

[0133] In the ninth aspect of the present application, the constituent modules of the communication device can also be used to execute the steps performed in each possible implementation method of the fourth aspect and achieve corresponding technical effects. For details, please refer to the fourth aspect and will not be repeated here.

[0134] In the tenth aspect of the present application, a communication device is provided, which is a third communication device. The device includes a transceiver unit and a processing unit. The transceiver unit is used to receive a primary synchronization signal PSS in a signal block in a second time period, and the first signal is used for synchronization; the processing unit is used to receive a secondary synchronization signal SSS and / or a physical broadcast channel PBCH in the signal block based on the PSS within the second time period.

[0135] In the tenth aspect of the present application, the constituent modules of the communication device can also be used to execute the steps performed in each possible implementation method of the fifth aspect and achieve corresponding technical effects. For details, please refer to the fifth aspect and will not be repeated here.

[0136] In an eleventh aspect, the present application provides a communication device, comprising at least one processor, wherein the at least one processor is coupled to a memory; the memory is used to store programs or instructions; the at least one processor is used to execute the program or instructions so that the device implements the method described in any possible implementation method of any one of the first to fifth aspects.

[0137] A twelfth aspect of the present application provides a communication device comprising at least one logic circuit and an input / output interface; the logic circuit is used to execute the method described in any possible implementation method of any one of the first to fifth aspects above.

[0138] In a thirteenth aspect, the present application provides a communication system, comprising the first communication device and the second communication device. Alternatively, the communication system comprises the first communication device and the third communication device. Alternatively, the communication system comprises the first communication device, the second communication device, and the third communication device.

[0139] In the fourteenth aspect, the present application provides a computer-readable storage medium, which is used to store one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes the method described in any possible implementation of any aspect of the first to fifth aspects above.

[0140] The fifteenth aspect of the present application provides a computer program product (or computer program). When the computer program in the computer program product is executed by the processor, the processor executes the method described in any possible implementation of any one of the first to fifth aspects above.

[0141] In a sixteenth aspect, the present application provides a chip system comprising at least one processor for supporting a communication device to implement the method described in any possible implementation of any one of the first to fifth aspects.

[0142] In one possible design, the chip system may further include a memory for storing program instructions and data necessary for the communication device. The chip system may be composed of a chip or may include a chip and other discrete components. Optionally, the chip system may further include an interface circuit for providing program instructions and / or data to the at least one processor.

[0143] Among them, the technical effects brought about by any design method in the sixth to sixteenth aspects can refer to the technical effects brought about by the different design methods in the above-mentioned first to fifth aspects, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0144] Figures 1a to 1d are some schematic diagrams of the communication system provided by this application;

[0145] FIG2 is a schematic diagram of a communication method provided by the present application;

[0146] FIG3 is another schematic diagram of the communication method provided by the present application;

[0147] Figures 4a to 4d are some schematic diagrams of signal blocks provided in this application;

[0148] Figures 5a to 5e are some schematic diagrams of signal blocks provided in this application;

[0149] Figures 6a to 6n are some schematic diagrams of signal blocks provided in this application;

[0150] FIG7a is a schematic diagram of a signal block set provided by the present application;

[0151] Figures 7b to 7e are some schematic diagrams of the communication system provided by this application;

[0152] 8-11 are schematic diagrams of the communication device provided in this application. DETAILED DESCRIPTION

[0153] First, some of the terms used in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

[0154] (1) Terminal device: It can be a wireless terminal device that can receive network device scheduling and instruction information. The wireless terminal device can be a device that provides voice and / or data connectivity to the user, or a handheld device with wireless connection function, or other processing device connected to a wireless modem.

[0155] Terminal devices can communicate with one or more core networks or the Internet via a radio access network (RAN). Terminal devices can be mobile terminal devices, such as mobile phones (also known as "cellular" phones, mobile phones), computers, and data cards. For example, they can be portable, pocket-sized, handheld, computer-built-in, or vehicle-mounted mobile devices that exchange voice and / or data with the radio access network. Examples include personal communication service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), tablet computers, and computers with wireless transceiver capabilities. Wireless terminal equipment can also be called system, subscriber unit, subscriber station, mobile station, mobile station (MS), remote station, access point (AP), remote terminal equipment (remote terminal), access terminal equipment (access terminal), user terminal equipment (user terminal), user agent, subscriber station (SS), customer premises equipment (CPE), terminal, user equipment (UE), mobile terminal (MT), etc.

[0156] As an example and not a limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices or smart wearable devices, etc., which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, etc., as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets, smart helmets, and smart jewelry for vital sign monitoring.

[0157] The terminal may also be a drone, a robot, a terminal in device-to-device (D2D) communication, a terminal in vehicle-to-everything (V2X), a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc.

[0158] In addition, the terminal device may also be a terminal device in a communication system that has evolved after the fifth generation (5G) communication system (e.g., a sixth generation (6G) communication system) or a terminal device in a future public land mobile network (PLMN). For example, the 6G network can further expand the form and function of 5G communication terminals. 6G terminals include but are not limited to vehicles, cellular network terminals (with integrated satellite terminal functions), drones, and Internet of Things (IoT) devices.

[0159] In an embodiment of the present application, the terminal device may also obtain AI services provided by the network device. Optionally, the terminal device may also have AI processing capabilities.

[0160] (2) Network equipment: It can be a device in a wireless network. For example, the network equipment can be a RAN node (or device) that connects a terminal device to a wireless network, which can also be called a base station. Currently, some examples of RAN equipment include: base station, evolved NodeB (eNodeB), gNB (gNodeB) in a 5G communication system, transmission reception point (TRP), evolved Node B (eNB), radio network controller (RNC), Node B (NB), home base station (e.g., home evolved Node B, or home Node B, HNB), base band unit (BBU), or wireless fidelity (Wi-Fi) access point AP, etc. In addition, in a network structure, the network equipment can include a centralized unit (CU) node, a distributed unit (DU) node, or a RAN device including a CU node and a DU node.

[0161] Alternatively, a RAN node can be a macro base station, micro base station, indoor base station, relay node, donor node, or a wireless controller in a cloud radio access network (CRAN) scenario. A RAN node can also be a server, wearable device, vehicle, or vehicle-mounted device. For example, the access network device in vehicle-to-everything (V2X) technology can be a roadside unit (RSU).

[0162] In another possible scenario, multiple RAN nodes collaborate to assist the terminal in achieving wireless access, and different RAN nodes respectively implement part of the functions of the base station. For example, the RAN node can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU can be set separately, or they can be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0163] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in an open access network (open RAN, O-RAN or ORAN) system, CU may also be called O-CU (open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, this application takes CU, CU-CP, CU-UP, DU and RU as examples for description. Any unit of CU (or CU-CP, CU-UP), DU and 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.

[0164] The communication between the access network device and the terminal device follows a certain protocol layer structure. The protocol layer may include a control plane protocol layer and a user plane protocol layer. The control plane protocol layer may include at least one of the following: a radio resource control (RRC) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, a media access control (MAC) layer, or a physical (PHY) layer. The user plane protocol layer may include at least one of the following: a service data adaptation protocol (SDAP) layer, a PDCP layer, an RLC layer, a MAC layer, or a physical layer.

[0165] For the correspondence between network elements in the ORAN system and their achievable protocol layer functions, please refer to Table 1 below.

[0166] Table 1

[0167] The network device may be any other device that provides wireless communication functionality to the terminal device. The embodiments of this application do not limit the specific technology and device form used by the network device. For ease of description, the embodiments of this application do not limit this.

[0168] The network equipment may also include core network equipment, which may include, for example, a mobility management entity (MME), a home subscriber server (HSS), a serving gateway (S-GW), a policy and charging rules function (PCRF), and a public data network gateway (PDN gateway, P-GW) in a fourth generation (4G) network; and network elements such as an access and mobility management function (AMF), a user plane function (UPF), or a session management function (SMF) in a 5G network. In addition, the core network equipment may also include other core network equipment in a 5G network and a next generation network of a 5G network.

[0169] In an embodiment of the present application, the above-mentioned network device may also have a network node with AI capabilities, which can provide AI services for terminals or other network devices. For example, it can be an AI node on the network side (access network or core network), a computing power node, a RAN node with AI capabilities, or a core network element with AI capabilities, etc.

[0170] In the embodiments of the present application, the apparatus for implementing the function of the network device may be the network device, or may be a device capable of supporting the network device in implementing the function, such as a chip system, which may be installed in the network device. In the technical solutions provided in the embodiments of the present application, the technical solutions provided in the embodiments of the present application are described by taking the network device as an example.

[0171] (3) Configuration and pre-configuration: In this application, configuration and pre-configuration are used simultaneously. Configuration refers to the network device / server sending some parameter configuration information or parameter values ​​to the terminal through messages or signaling, so that the terminal can determine the communication parameters or resources during transmission based on these values ​​or information. Pre-configuration is similar to configuration, and can be parameter information or parameter values ​​pre-negotiated between the network device / server and the terminal device, or parameter information or parameter values ​​used by the base station / network device or terminal device as specified in the standard protocol, or parameter information or parameter values ​​pre-stored in the base station / server or terminal device. This application does not limit this.

[0172] Furthermore, these values ​​and parameters can be changed or updated.

[0173] (4) The terms "system" and "network" in the embodiments of the present application can be used interchangeably. "Multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, "at least one of A, B or C" includes A, B, C, AB, AC, BC or ABC. In addition, unless otherwise specified, the ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, timing, priority or importance of multiple objects.

[0174] (5) “Sending” and “receiving” in the embodiments of the present application indicate the direction of signal transmission. For example, “sending information to XX” can be understood as the destination of the information being XX, which can include direct sending through the air interface, as well as indirect sending through the air interface by other units or modules. “Receiving information from YY” can be understood as the source of the information being YY, which can include direct receiving from YY through the air interface, as well as indirect receiving from YY through the air interface from other units or modules. “Sending” can also be understood as the “output” of the chip interface, and “receiving” can also be understood as the “input” of the chip interface.

[0175] In other words, sending and receiving can be performed between devices, for example, between a network device and a terminal device, or can be performed within a device, for example, sending or receiving between components, modules, chips, software modules or hardware modules within the device through a bus, wiring or interface.

[0176] It is understandable that information may be processed between the source and destination of information transmission, such as coding, modulation, etc., but the destination can understand the valid information from the source. Similar expressions in this application can be understood similarly and will not be repeated.

[0177] (6) In the embodiments of the present application, "indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. The information indicated by a certain information (such as the indication information described below) is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, directly indicating the information to be indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated may also be indirectly indicated by indicating other information, wherein the other information is associated with the information to be indicated; or only a part of the information to be indicated may be indicated, while the other part of the information to be indicated is known or agreed in advance. For example, the indication of specific information may be achieved by means of the arrangement order of each information agreed in advance (such as predefined by the protocol), thereby reducing the indication overhead to a certain extent. The present application does not limit the specific method of indication. It is understandable that for the sender of the indication information, the indication information can be used to indicate the information to be indicated, and for the receiver of the indication information, the indication information can be used to determine the information to be indicated.

[0178] In this application, unless otherwise specified, the same or similar parts between the various embodiments can refer to each other. In the various embodiments of this application, and the various methods / designs / implementations in each embodiment, if there is no special explanation and logical conflict, the terms and / or descriptions between different embodiments and the various methods / designs / implementations in each embodiment are consistent and can be referenced to each other. The technical features in different embodiments and the various methods / designs / implementations in each embodiment can be combined to form new embodiments, methods, or implementations according to their inherent logical relationships. The following description of the implementation methods of this application does not constitute a limitation on the scope of protection of this application.

[0179] The present application can be applied to a long term evolution (LTE) system, a new radio (NR) system, or a communication system evolved after 5G (such as 6G, etc.). The communication system includes at least one network device and / or at least one terminal device.

[0180] Please refer to Figure 1a, which is a schematic diagram of the architecture of a communication system 1000 used in an embodiment of the present application. As shown in Figure 1a, the communication system includes a radio access network (RAN) 100 and a core network 200. Optionally, the communication system 1000 may also include the Internet 300. The RAN 100 includes at least one RAN node (such as 110a and 110b in Figure 1a, collectively referred to as 110) and may also include at least one terminal (such as 120a-120j in Figure 1a, collectively referred to as 120). The RAN 100 may also include other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in Figure 1a). The terminal 120 is connected to the RAN node 110 wirelessly, and the RAN node 110 is connected to the core network 200 wirelessly or by wire. The core network devices in the core network 200 and the RAN node 110 in the RAN 100 may be independent and different physical devices, or they may be the same physical device that integrates the logical functions of the core network devices and the logical functions of the RAN nodes. Terminals and RAN nodes may be connected to each other via wired or wireless means.

[0181] RAN100 may be an evolved universal terrestrial radio access (E-UTRA) system, a new radio (NR) system, or a future radio access system defined in the 3rd Generation Partnership Project (3GPP). RAN100 may also include two or more of the aforementioned different radio access systems. RAN100 may also be an open RAN (O-RAN).

[0182] A RAN node, also known as a radio access network device, RAN entity, or access node, facilitates wireless access to a communication system by a terminal. In one application scenario, a RAN node can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next-generation NodeB (gNB) in a fifth-generation (5G) mobile communication system, a next-generation base station in a sixth-generation (6G) mobile communication system, or a base station in a future mobile communication system. A RAN node can be a macro base station (such as 110a in Figure 1a), a micro base station, an indoor station (such as 110b in Figure 1a), a relay node, or a donor node.

[0183] In another application scenario, multiple RAN nodes can collaborate to help terminals achieve wireless access, with different RAN nodes implementing portions of the base station's functions. For example, a RAN node can be a centralized unit (CU), a distributed unit (DU), or a radio unit (RU). The CU implements the base station's radio resource control protocol and packet data convergence protocol (PDCP) functions, and can also implement the service data adaptation protocol (SDAP) functions; the DU implements the base station's radio link control layer and MAC layer functions, and can also implement some or all of the physical layer functions. For detailed descriptions of each of the above protocol layers, please refer to the relevant technical specifications of 3GPP. The RU can be used to implement the transmission and reception of radio frequency signals. The CU and DU can be two independent RAN nodes, or they can be integrated into the same RAN node, such as in a baseband unit (BBU). The RU can be included in radio frequency equipment, such as a remote radio unit (RRU) or an active antenna unit (AAU). The CU can be further divided into two types of RAN nodes: CU-control plane and CU-user plane.

[0184] In different systems, RAN nodes may have different names. For example, in an O-RAN system, a CU may be called an open CU (O-CU), a DU may be called an open DU (O-DU), and a RU may be called an open RU (O-RU). The RAN node in the embodiments of the present application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module. For example, the RAN node may be a server loaded with the corresponding software module. The embodiments of the present application do not limit the specific technology and specific device form adopted by the RAN node. For ease of description, the following description takes a base station as an example of a RAN node.

[0185] A terminal is a device with wireless transceiver capabilities that can send signals to a base station or receive signals from a base station. A terminal may also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal, etc. Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city, etc. A terminal can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, wearable device, vehicle, airplane, ship, robot, robotic arm, smart home device, etc. The embodiments of this application do not limit the specific technology and specific device form adopted by the terminal.

[0186] Base stations and terminals can be fixed or mobile. They can be deployed on land, indoors or outdoors, handheld or vehicle-mounted; on water; or on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of base stations and terminals.

[0187] The roles of base stations and terminals can be relative. For example, the helicopter or drone 120i in Figure 1a can be configured as a mobile base station. To terminals 120j accessing the wireless access network 100 via 120i, terminal 120i is a base station. However, to base station 110a, 120i is a terminal, meaning that communication between 110a and 120i occurs via a wireless air interface protocol. Of course, communication between 110a and 120i can also occur via a base station-to-base station interface protocol. In this case, 120i is also a base station relative to 110a. Therefore, base stations and terminals can be collectively referred to as communication devices. 110a and 110b in Figure 1a can be referred to as communication devices with base station functionality, while 120a-120j in Figure 1a can be referred to as communication devices with terminal functionality.

[0188] Communication between base stations and terminals, between base stations, and between terminals can be carried out through authorized spectrum, unauthorized spectrum, or both; communication can be carried out through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or spectrum below 6 GHz and spectrum above 6 GHz. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

[0189] In the embodiments of the present application, the functions of the base station may also be performed by a module (such as a chip) in the base station, or by a control subsystem that includes the base station functions. The control subsystem that includes the base station functions here may be a control center in the above-mentioned application scenarios such as smart grid, industrial control, smart transportation, and smart city. The functions of the terminal may also be performed by a module (such as a chip or modem) in the terminal, or by a device that includes the terminal functions.

[0190] Figure 1b is another schematic diagram of a communication system provided by an embodiment of the present application. In Figure 1b, the network device is a base station as an example for illustration, and device 1 and device 2 are both terminal devices. As shown in Figure 1b, the communication link between device 1 and device 2 can be called a sidelink (SL), and the communication link between device 1 (or device 2) and the base station can be called an uplink and a downlink, including an uplink and a downlink. It can be seen that a sidelink is a communication mechanism that allows different terminal devices to communicate directly without going through a network device.

[0191] Optionally, in the sidelink (SL), generally speaking, the transmitting device and the receiving device can be a terminal device or network device of the same type, or a road side unit (RSU) and a terminal device, wherein the RSU is a road side station or road side unit from a physical entity point of view, and from a functional point of view, the RSU can be a terminal device or a network device, and this application does not impose any restrictions on this. That is, the transmitting device is a terminal device and the receiving device is also a terminal device; or, the transmitting device is a road side station and the receiving device is also a terminal device; or, the transmitting device is a terminal device and the receiving device is also a road side station. In addition, the sidelink can also be a base station device of the same type or different types. At this time, the function of the sidelink is similar to that of the relay link, but the air interface technology used can be the same or different.

[0192] Exemplarily, the sidelink supports broadcast, unicast, and multicast.

[0193] Broadcast communication is similar to network device broadcasting system information, that is, the terminal device sends broadcast service data to the outside without encryption. Any other terminal device within the effective receiving range can receive the broadcast service data if it is interested in the broadcast service.

[0194] Unicast communication is similar to data communication that occurs after an RRC connection is established between a terminal device and a network device. It requires a unicast connection to be established between the two devices. After the unicast connection is established, the two devices can communicate data based on a negotiated identifier. This data can be encrypted or unencrypted. Unlike broadcasting, unicast communication is only possible between two devices that have established a unicast connection.

[0195] Optionally, a unicast communication on the sidelink corresponds to a pair of a source layer-2 identifier (denoted as source L2 ID) and a destination layer-2 identifier (denoted as destination L2 ID). Optionally, the source L2 ID and the destination L2 ID are included in a subheader of a media access control protocol data unit (MAC PDU) in the sidelink to ensure that the data is transmitted to the correct receiving end.

[0196] Multicast communication refers to communication between all terminal devices in a communication group. Any terminal device in the group can send and receive data of the multicast service.

[0197] As shown in Figure 1c, when a terminal device (denoted as UE1) communicates directly with another terminal device (denoted as UE2) without going through a network device, the communication link between the two terminal devices can be called a sidelink, or the two terminal devices are said to communicate based on the proximity-based services communication 5 (PC5) port.

[0198] As shown in Figure 1d, V2X communication technology, a typical application of sidelinks, leverages and enhances current cellular network features and elements to enable low-latency and high-reliability communications between various nodes in a vehicle network, including vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P), vehicle-to-infrastructure (V2I), and vehicle-to-network (V2N). As cellular systems evolve from 4G Long Term Evolution (LTE) to 5G, C-V2X is evolving from LTE-V2X to NR-V2X (New Radio V2X).

[0199] Furthermore, V2X communication has significant potential to reduce vehicle collisions, thereby reducing the number of casualties. The advantages of V2X extend beyond safety. Vehicles capable of V2X communication contribute to better traffic management, further promoting green transportation and lowering energy consumption. The Intelligent Transportation System (ITS) is an application that integrates V2X. Based on V2X technology, vehicle users (V-UEs) can transmit information such as their location, speed, and intentions (turns, lane changes, and reversing) to surrounding V-UEs periodically, as well as information triggered by aperiodic events. Similarly, V-UEs receive real-time information from surrounding users. 5G NR V2X supports lower transmission latency, more reliable communication, higher throughput, and a better user experience, meeting the needs of a wider range of application scenarios. Furthermore, the vehicle-to-vehicle communication technology supported by V2X can be extended to device-to-device (D2D) communication in any system.

[0200] With the widespread adoption of internet applications and wireless network devices, the demand for wireless communications is increasing. Communication technology is also evolving, from 4G to 5G and on to next-generation communications. The communication spectrum is also shifting from low-frequency bands to high-frequency bands such as millimeter waves, terahertz, and optical communications. Future communication systems will not only possess enhanced communication capabilities but also perception capabilities, integrating communication and perception. This integrated communication and perception approach can leverage the transmission, reflection, and scattering of radio waves to perceive and characterize the environment, enabling high-precision positioning and tracking, gesture and activity recognition, simultaneous imaging, localization and mapping (SLAM), and human sensory enhancement. Future perception demands higher precision while also maintaining latency constraints. For integrated sensory fusion systems, perception is also expected to contribute to increased communication capacity.

[0201] Currently, in a communication system (e.g., any of the communication systems shown in Figures 1a through 1c), after a transmitter sends a signal, a receiver can send feedback information based on the signal, enabling the transmitter to detect the receiver based on the feedback information. In other words, if multiple communication devices exist in a physical space, one communication device can detect other communication devices based on the feedback information from other communication devices after sending a signal.

[0202] For example, let's take the signal sent by the transmitter as a reference signal. After the reference signal sent by the transmitter is transmitted through the wireless channel and received by the receiver, the signal received by the receiver will have the channel characteristics of the wireless channel, and the receiver can measure the reference signal to obtain a measurement result (that is, the measurement result can indicate the channel characteristics to a certain extent), and then feed back the measurement result to the transmitter. Accordingly, the transmitter can determine precoding information, signal transmission quality, etc. based on the measurement result. In other words, the receiver can perceive the transmitter based on the reference signal, and correspondingly, the transmitter can perceive the receiver based on the measurement result, that is, different communication devices perceive each other through the transmission and reception of signals.

[0203] However, in the above implementation process, the transmitting end and the receiving end rely on the signal sent by the other end to achieve perception, which is relatively cumbersome and complex.

[0204] To address the aforementioned issues, the present application provides a communication method and related apparatus, which enable a first signal sent by a first communication device to be used for both synchronization with other communication devices and perception by the first communication device. This reduces the complexity of perception implementation while also improving resource utilization and communication efficiency. This will be described in detail below with reference to the accompanying drawings.

[0205] Please refer to FIG2 , which is a schematic diagram of the communication method provided by this application.

[0206] It should be noted that in Figure 2 (and Figure 3 below), the method is illustrated by taking a communication device as the executor of the information sending and receiving process as an example, but the present application does not limit the executor of the information sending and receiving process. For example, in Figure 2 (and Figure 3 below), the executor of the method can be replaced by a chip, a chip system, a processor, a logic module or software in the communication device. Among them, the first communication device can be an access network device, the second communication device in Figure 3 below can be a core network device or a cloud server, and the third communication device can be a terminal device. Alternatively, the first communication device can be a terminal device, the second communication device in Figure 3 below can be an access network device or a core network device or a cloud server, and the third communication device can be a terminal device.

[0207] S201. A first communication device sends a first signal, where the first signal is used for synchronization.

[0208] S202. The first communication device receives a second signal, where the second signal is an echo signal of the first signal and is used for sensing.

[0209] It should be understood that the echo signal of a signal (e.g., the echo signal of the first signal) can be understood as the signal formed by the signal transmitted by the transmitting device and colliding with various obstacles in physical space (e.g., at least one of reflection, diffraction, or scattering) before reaching the transmitting device. Accordingly, the echo signal is used for sensing, which can be understood as the echo signal being used to sense (or reflect) one or more of the following: obstacle information for the signal in physical space, transmission channel information formed by collision with obstacles, or transmission path information.

[0210] In other words, in step S201, after the first communication device sends the first signal to the wireless channel, the first signal will be transmitted through the wireless channel and will form a second signal after colliding with various obstacles in the physical space, so that the first communication device can receive the second signal through the wireless channel in step S202.

[0211] Optionally, the echo signal may be replaced by other terms, such as reflection signal, perception feedback signal, perception response signal, detection response signal, radar signal, etc.

[0212] Optionally, the echo signal is used for perception (for example, the second signal is the echo signal of the first signal, and the second signal is used for perception). It can be understood that the echo signal is used for one or more of self-perception, positioning, measurement, detection, channel perception, monitoring, tracking, time measurement, distance measurement, angle measurement, speed measurement, Doppler frequency shift measurement, point cloud measurement, intensity measurement, direction measurement, or perception feedback.

[0213] Optionally, the perception results obtained from the echo signals used for perception can be applied to various services, such as one or more of environmental perception, target recognition, target location tracking, or target imaging. Environmental perception can include one or more of geographic location, distance, speed, angle, map, posture, scale, imaging, or material perception.

[0214] Optionally, the transmitting beam of the first signal and the receiving beam of the second signal may be the same beam (or adjacent beams). In this way, the success rate of receiving the second signal may be improved.

[0215] In one possible implementation, the process of the first communication device receiving the second signal in step S202 includes: the first communication device receiving the second signal within a first time period. Specifically, during the process of receiving the second signal, the first communication device may receive the second signal by performing signal detection within the first time period. Because the second signal is an echo signal formed by the first signal colliding with an obstacle in physical space, this method enables the first communication device to receive the second signal within a configured or preconfigured first time period. This can avoid unnecessary overhead caused by the first communication device continuing to detect the second signal for a long time if the first communication device fails to receive the second signal (for example, if the transmission loss of the first signal on the transmission path is large, or the obstacle that collides with the first signal is far away, resulting in low energy of the echo signal, resulting in the first communication device failing to successfully detect the second signal). The first time period can be configured to correspond to the distance or range of the sensing requirement, so that the first device can perform sensing signal detection according to the sensing requirement.

[0216] Exemplarily, in step S202, when the first communication device receives the second signal within the first time period, the first communication device can use one or more time units contained in the first time period as a sliding window within the first time period (hereinafter described as a receiving window in some cases) to slide one sampling point at a time to perform reflected signal detection until reaching the last time unit of the first time period.

[0217] Optionally, when the above technical solution is applied to a half-duplex scenario or mode, the first communication device may not be able to receive and transmit signals in the same time unit. Therefore, while the first communication device is receiving the second signal within the first time period, the first communication device does not transmit any signal. In other words, the first time period is not used for signal transmission.

[0218] Optionally, in a full-duplex scenario or mode where the above technical solution is applied, the first communication device may receive and transmit signals in the same time unit. To this end, while the first communication device is receiving the second signal within the first time period, the first communication device may also transmit the signal. Generally, to avoid co-channel interference, during the first time period, the first communication device may receive the second signal on a certain frequency band and transmit and / or receive other signals on frequency bands other than the second frequency band.

[0219] In a possible implementation, as shown in FIG3 , compared to the method shown in FIG2 , the method further includes:

[0220] Step A: The second communication device sends first configuration information, and correspondingly, the first communication device receives the first configuration information, wherein the first configuration information is used to configure the first time period.

[0221] Specifically, the first communication device can also receive first configuration information for configuring the first time period in step A (that is, the first configuration information includes configuration information for configuring the first time period), so that the first communication device performs reception of the second signal in the first time period based on the configuration of the second communication device to improve the reception success rate of the second signal received by the first communication device.

[0222] Optionally, the first time period is preconfigured, in this way, configuration overhead can be saved.

[0223] Based on the technical solution of Figure 2, after the first communication device sends the first signal for synchronization in step S201, the first communication device can receive the second signal for perception in step S202, and the second signal is the echo signal of the first signal. After the first communication device sends the first signal, the first signal will form an echo signal after colliding with various obstacles in the physical space (for example, at least one of reflection, diffraction or scattering), so that the first communication device can achieve perception based on the echo signal of the first signal. Therefore, compared with the implementation method in which the signal sending end depends on the feedback of the signal receiving end to achieve perception, the first communication device achieves perception through the echo signal of the first signal sent by itself, which can reduce the implementation complexity.

[0224] In addition, compared with perception achieved through signals with larger bandwidth and time-based measurements, in the above technical solution, the first signal used for synchronization occupies a smaller bandwidth. Under a certain antenna aperture, more accurate angle measurements can be made based on the first signal, thereby achieving better perception performance with a smaller signal bandwidth.

[0225] In addition, the first signal sent by the first communication device can be used for synchronization, that is, after other communication devices receive the first signal, the other communication devices can obtain synchronization information (such as time domain synchronization, frequency domain synchronization, etc.) based on the first signal. In other words, after the first communication device sends the first signal, the first communication device can achieve perception based on the echo signal of the first signal, and other communication devices can obtain synchronization information based on the first signal. Therefore, the first signal sent by the first communication device can be used for both synchronization of other communication devices and perception of the first communication device, which can improve resource utilization and thus improve communication efficiency.

[0226] For example, as shown in FIG3 , after the first communication device sends the first signal to the wireless channel in step S201 , the first signal may be received by other communication devices, so that the other communication devices obtain synchronization information based on the first signal.

[0227] In one implementation example, as described above, the first communication device shown in FIG3 may be an access network device. Accordingly, the second communication device that sends the first configuration information in step A may be a core network device or a cloud server, and the third communication device that receives the first signal in step S201 may be a terminal device. Thus, after the access network device (e.g., a base station) sends the first signal in step S201, it enables the terminal device to obtain synchronization information based on the first signal, and also enables the access network device to achieve self-perception of the access network device based on the echo signal (i.e., the second signal) of the first signal in step S202.

[0228] Alternatively, the first communication device shown in FIG3 may be a terminal device, the second communication device in FIG3 below may be an access network device, a core network device, or a cloud server, and the third communication device that receives the first signal in step S201 may be another terminal device. Thus, after the terminal device sends the first signal in step S201, it enables other terminal devices to obtain synchronization information based on the first signal, and also enables the terminal device to achieve self-perception of the terminal device based on the echo signal (i.e., the second signal) of the first signal in step S202.

[0229] Optionally, the method shown in FIG. 2 or FIG. 3 can also be applied to the implementation process of collaborative perception. For example, after the first communication device receives the second signal in step S202 and obtains a perception result based on the second signal, the first communication device can send the perception result to other devices to assist the other devices in performing perception. For example, the other devices can be core network devices, access network devices, or terminal devices. Taking the first communication device as a terminal device or a first access network device, and the other device as a second access network device as an example, when the second access network device has a perception requirement for a certain area, the first communication device can participate in the perception of the area and feed back the perception result to the second access network device, so that the second access network device can achieve collaborative perception based on the perception results from one or more first communication devices.

[0230] In the technical solution shown in FIG2 , the first signal for synchronization sent by the first communication device in step S201 may be implemented in a variety of ways, which will be described in detail below with reference to the accompanying drawings.

[0231] Implementation method 1: In step S202, the first communication device may use a first time period for receiving the second signal to include a continuous time unit in the time domain.

[0232] In one possible implementation of Implementation Method 1, the time domain location of the time domain resource carrying the first signal is located before the first time period; and the time domain location of the time domain resource carrying the first signal is adjacent to the first time period. In other words, after the first communications device transmits the first signal in step S201, it receives the second signal in a first time period adjacent to the time domain resource carrying the first signal, making the solution applicable to half-duplex scenarios, i.e., the first communications device receives the second signal after transmitting the first signal.

[0233] As shown in the example of FIG4a , for the first communications device, the duration for transmitting the first signal in step S201 may be a transmit window (Tx window) or a transmit symbol time, and the duration for receiving the second signal in step S202 (i.e., the first time period described above) may be the "receive window (Rx window)" in FIG4a . In FIG4a , the transmit window and the receive window are adjacent.

[0234] Optionally, in the example shown in Figure 4a, the time domain position of the time domain resource carrying the first signal is adjacent to the first time period, that is, the first communication device receives the second signal in an adjacent receiving window after sending the first signal in the sending window. Since the length of the transmission delay of the echo signal is positively correlated with the length or distance of the perception distance, for this reason, the implementation method in which the first communication device can receive the second signal in a shorter time after sending the first signal can enable the solution to be applied to scenarios with a shorter perception (or detection) distance.

[0235] Optionally, the above technical solution is applied to a full-duplex scenario or mode, and the first communication device can perform reception of the second signal while sending the first signal. In other words, the time domain position of the time domain resource carrying the first signal can be located before the first time period, or the time domain position of the time domain resource carrying the first signal can partially overlap or completely overlap with the first time period, which is not limited here. The start and end time of the first time period depends on the distance requirement of the perception detection. Since the first time period can overlap with the sending time of the first signal in the full-duplex mode, the solution can be applied to scenarios with shorter perception (or detection) distances.

[0236] It should be understood that the resource position of one resource being before or after the resource position of another resource may be a before-after relationship in the time domain. For example, if the resource position of one resource is before the resource position of another resource, it can be understood that the resource index of the one resource is less than the resource index of the other resource. Correspondingly, if the resource position of one resource is after the resource position of another resource, it can be understood that the resource index of the one resource is greater than the resource index of the other resource.

[0237] In one possible implementation, the first time period includes time resources for a guard period (GP). Specifically, the time resources for receiving the first time period may include the GP. In this way, the solution can be applied to half-duplex scenarios, and the first communication device can perform a transmit-receive conversion within the GP time interval to improve the success rate of the first communication device receiving the second signal.

[0238] Optionally, when the first time period includes GP time resources, the GP time resources may be one or more time units that are continuous in the time domain, and the time domain starting position of the one or more time units is the same as the time domain starting position of the first time period. In this way, resource utilization can be improved.

[0239] Exemplarily, as shown in FIG4 b , the GP may be located at the starting position within the receiving window, that is, the time adjacent to the sending window is the GP.

[0240] In another possible implementation of implementation method 1, the time domain location of the time domain resource carrying the first signal is located before the first time period; and the time domain location of the time domain resource carrying the first signal is not adjacent to the first time period. In other words, after the first communications device sends the first signal in step S201, in step S202, the first communications device receives the second signal in a first time period that is not adjacent to the time domain resource carrying the first signal. This makes the solution applicable to half-duplex scenarios, i.e., the first communications device receives the second signal after sending the first signal.

[0241] As shown in the example of FIG4c , for the first communication device, the duration for transmitting the first signal in step S201 may be a transmit window (Tx window) or a transmit symbol time, and the duration for receiving the second signal in step S202 (i.e., the duration is the first time period described above) may be the "receive window (Rx window)" in FIG4a . In FIG4c , the transmit window and the receive window are not adjacent, and are separated by a time "P." It should be understood that the time "P" between the transmit window and the receive window in FIG4c may be independent of the transmit window and the receive window, or may be contained within the transmit window or the receive window (e.g., as shown in FIG4b ), and this is not limited here.

[0242] Optionally, the time domain position of the time domain resource carrying the first signal is not adjacent to the first time period, that is, the first communication device receives the second signal at a non-adjacent time domain position a certain time after sending the first signal. Since the transmission delay of the echo signal is positively correlated with the length or distance of the perception distance, for this reason, by setting the interval time "P" between the sending window and the receiving window in Figure 4c, the first communication device can receive the second signal within a longer time after sending the first signal, which enables the solution to be applied to scenarios with longer perception (or detection) distances.

[0243] Optionally, the time interval between the time domain location of the time domain resource carrying the first signal and the first time period is GP. In this way, the solution can be applied to half-duplex scenarios, and the first communication device can perform transceiver conversion within the GP time interval to improve the success rate of the first communication device receiving the second signal.

[0244] For example, as shown in FIG4 d , the GP may be located within the time interval "P" between the sending window and the receiving window. That is, the time interval adjacent to the sending window is used for the GP. It should be understood that in FIG4 d , the GPs of the sending window and the receiving window may be independent of the sending window and the receiving window, or may be included within the sending window or the receiving window (for example, the implementation shown in FIG4 b ), and this is not limited here.

[0245] It should be noted that the first signal sent by the first communication device in step S201 may include synchronization information in a signal block (or synchronization signal block). The name of the signal block may be a synchronization signal / physical broadcast channel block (SS / PBCH block) (or SS / PBCH, SSB, etc.), a sidelink synchronization signal / physical broadcast channel block (sidelink SSB, SL-SSB, or S-SS / PSBCH block), a sensing signal block (SEB), or other names.

[0246] As shown in Figure 5a, taking the signal block as SSB as an example, generally, SSB can include PSS, SSS and PBCH. In the current NR system, as shown in Figure 5a, in the time domain, SSB can occupy 4 symbols, of which PSS is located in the first symbol, SSS is located in the third symbol, and PBCH is located in the second symbol, the third symbol and the fourth symbol; in the time domain, SSB can occupy 240 subcarriers (i.e., subcarrier indexes 0-239), of which PSS occupies 127 subcarriers (i.e., subcarrier indexes 56-182) in the first symbol, SSS occupies 127 subcarriers (i.e., subcarrier indexes 56-182) in the third symbol, PBCH occupies 240 subcarriers (i.e., subcarrier indexes 0-239) in both the second symbol and the fourth symbol, and PBCH occupies 96 subcarriers (i.e., subcarrier indexes 0-47 and in carrier indexes 192-239) in the third symbol.

[0247] In addition, the first signal sent by the first communication device in step S201 may include PSS and / or SSS. Since the propagation speed of the wireless signal in space is equal to or close to the speed of light, in order to improve the success rate of the first communication device receiving the second signal within the receiving window, it can be seen from the description of the above implementation method one that the receiving window for carrying the second signal is adjacent to the sending window for sending the first signal in the time domain (or the two are separated by GP). However, it can be seen from the SSB resource pattern (pattern) shown in Figure 5a above that if the current SSB resource pattern is used and PSS and / or SSS is used as the first signal, since the first communication device still needs to send PBCH in the next symbol after sending PSS and / or SSS, in this case, regardless of whether the first communication device supports half-duplex or full-duplex, the echo signal corresponding to PSS and / or SSS will be greatly interfered with by PBCH, and even the echo signal cannot be received. To this end, the present application provides some resource patterns adapted to the first signal and the second signal to improve the reception success rate of the echo signal (i.e., the second signal) of the first signal.

[0248] The following description will be made in combination with implementation example A and implementation example B.

[0249] In implementation example A, the first signal includes at least a secondary synchronization signal (SSS) in a signal block.

[0250] In implementation example A, the signal block is carried in N time units, and the first signal is carried in the last time unit of the N time units, where N is an integer greater than or equal to 1. Specifically, the first signal may include an SSS, so that the receiver of the first signal (e.g., the third communication device in FIG3 ) can obtain synchronization information carried by the SSS based on the SSS. Furthermore, the first signal may be carried in the last time unit of the N time units. In this way, the subsequent first communication device can receive the second signal in the first time period after the N time units.

[0251] Optionally, in the N time periods (or the M time units mentioned later), each time unit may be one or more symbols, one or more mini-slots, one or more time slots, one or more subframes, one or more frames, etc.

[0252] As an implementation example of implementation example A, as shown in FIG5b , the signal block can be carried in 4 (i.e., N is taken as 4 for example) time units, the PSS is carried in the first time unit, the SSS is carried in the fourth time unit, and the PBCH is carried in the second time unit, the third time unit, and the fourth time unit. Taking each time unit as an example of a symbol, compared with the SSB shown in FIG5a , the information carried by the third symbol and the fourth symbol of the SSB in FIG5a can be swapped (or the SSS is carried by the fourth symbol, and the PBCH is carried by the third and fourth symbols), so that the first signal can include the SSS of the fourth symbol to avoid interference caused by the PBCH to the receiving window.

[0253] Optionally, the signal block also includes a primary synchronization signal (PSS). As shown in the example of Figure 5b, the PSS is carried in the first time unit of the N time units. Specifically, the signal block sent by the first communication device may also include a PSS, so that the receiver of the first signal (for example, the third communication device in Figure 3) can obtain the synchronization information carried by the PSS based on the PSS. Moreover, the PSS can be carried in the first time unit of the N time units. In this way, in addition to being able to obtain the synchronization information carried by the PSS based on the PSS, the receiver of the signal block can also parse other information of the signal block (for example, SSS and / or PBCH) based on the synchronization information carried by the PSS to improve the success rate of receiving the other information.

[0254] Optionally, the signal block also includes a physical broadcast channel (PBCH) (or part of the information of the signal block is carried by the PBCH). As shown in the example of Figure 5b, the PBCH is carried in the remaining N-1 time units of the N time units except the first time unit. Specifically, the signal block sent by the first communication device may also include a PBCH, so that the receiver of the first signal (such as the third communication device in Figure 3) can obtain the system information carried by the PBCH based on the PBCH. Moreover, the PBCH is carried in the remaining N-1 time units of the N time units except the first time unit, and as many time units as possible can be used to carry the PBCH to carry more information.

[0255] It is understandable that in the example shown in Figure 5b, using the SSS as the sensing signal means that the subsequent receive window will not affect the PBCH. Furthermore, the PSS is detected first as the first symbol. Since the number of PSS sequences is smaller than that of the SSS, this helps reduce detection complexity. Furthermore, once the PSS is detected, its use in channel estimation facilitates subsequent signal detection and channel demodulation. The placement of the PBCH between the PSS and SSS allows for full utilization of channel estimation from both preceding and following synchronization signals, facilitating better PBCH demodulation performance.

[0256] Optionally, in the example shown in Figure 5b, the transmitting beam of PSS / SSS / PBCH can be the same beam, and accordingly, the receiving beam within the receiving window can be the same beam or an adjacent beam as the same beam. The determination of the receiving beam can be determined based on the reciprocity of the transmitting and receiving beams.

[0257] Optionally, the duration of the receiving window (or first time period) can be implemented in various ways. For example, the duration of the receiving window (or first time period) can be greater than or equal to the duration of the first signal to ensure that a complete echo signal (i.e., the second signal) can be received. For another example, considering the coverage distance and the selection of an integer number of symbols, the duration of the receiving window (or first time period) can be configured to be 2 symbols.

[0258] For example, taking 240Khz SCS as an example, a single symbol distance including CP can support coverage of 1.35km. The receiving window length is generally configured to be 2 symbols or longer. If there is no potential conflict or interference, a receiving window longer than 2 symbols can be configured when a longer coverage range is required. The symbol length corresponds to the symbol length of the perception signal. Without loss of generality, this embodiment and the following embodiments are described using a 2-symbol receiving window as an example. GP can typically be configured within the receiving window. Because the receiving detection uses a sliding window to cover the arrival time of the variable reflected signal, the front time can also be left blank as the GP without affecting the integrity of the entire receiving window symbol. Optionally, it can also be reserved at the end of the Tx symbol time.

[0259] In the example shown in Figure 5b, when the SSS is at a fixed position, for the third communication device, during the process of the third communication device receiving the first signal in step S201, the third communication device can detect the SSS at a fixed offset position after PSS detection; when there are different SSS positions in the communication and self-sensing modes, the third communication device can perform blind detection at candidate positions with different offsets from the PSS. The offset value can be predefined. In this embodiment, the offset value is 2 or 3, that is, the SSS corresponds to the symbol positions of n+2 and n+3, respectively, and n is the symbol where the PSS is located. When the SSS is configured or detected to be located at the n+2 symbol, the corresponding communication mode or no self-sensing mode; when the SSS is configured or detected to be located at the n+3 symbol, the corresponding SSS supports the self-sensing mode. When the third communication device obtains a mode configuration as a self-perception mode, it can be considered that the time window or the time-frequency resources corresponding to the first time period (the time domain resources correspond to the resources where the receiving window is located, and the frequency domain resources correspond to the synchronization signal bandwidth or the synchronization signal and broadcast channel bandwidth) are reserved resources. When a data resource containing the resource is received, the allocated data resource excludes the block of resources or performs rate matching on the block of resources, thereby facilitating the correct reception of data by the third communication device. Optionally, the self-perception mode configuration or the rate matching of the data resource to the self-perception receiving window can also be indicated by a synchronization signal or a broadcast channel. Optionally, the self-perception mode configuration or the rate matching of the data resource to the self-perception receiving window can also be preconfigured or predefined.

[0260] In one possible implementation of Example A, the first signal includes, in addition to the SSS, the PSS in the signal block, and the PSS is carried in the last time unit of the N time units. Specifically, the first signal sent by the first communication device may also include the PSS in the signal block, that is, the second signal includes both the echo signal of the PSS and the echo signal of the SSS. In this way, the first communication device can obtain as many echo signals as possible to improve perception performance.

[0261] As another implementation example of implementation example A, as shown in FIG5c, the signal block can be carried in 2 (i.e., N is taken as 2 for example) time units, the PSS and SSS are both carried in the second time unit, and the PBCH is carried in the first time unit and the second time unit. Taking each time unit and one symbol as an example, compared with the SSB shown in FIG5a, the SSB in FIG5a can be reduced to two symbols for carrying, and the PSS and SSS can be carried in the last symbol of the two symbols, so that the first signal includes the PSS and SSS of the second symbol, and the transmission of the PBCH is completed before the third symbol to avoid the inability to receive in the receiving window due to the transmission of the PBCH.

[0262] Optionally, as shown in the example of FIG5c, the signal block further includes a PBCH, and the PBCH is carried in the N time units. Specifically, when the first signal sent by the first communication device includes the PSS and SSS in the signal block, the signal block may further include a PBCH, and the PBCH is carried in the N time units, so that as many time units as possible can be used to carry the PBCH to carry more information.

[0263] It should be understood that in the example shown in Figure 5c, frequency division multiplexing of the PSS and SSS in the same time unit can reduce latency and provide a high gain for access to latency-sensitive services. Furthermore, in the example shown in Figure 5c, resources can be used for the receive window within the four-symbol resource. That is, the PSS / SSS and PBCH occupy the first two of the four symbols, leaving the last two symbols available for the receive window.

[0264] In implementation example B, the first signal includes a PSS in a signal block.

[0265] In implementation example B, the signal block includes N time units, and the first signal is carried in the first time unit of the N time units, where N is an integer greater than 1; the first time period is located between the first time unit and the other N-1 time units in the N units. Specifically, the first signal may include a PSS, so that the receiver of the first signal (such as the third communication device in Figure 3) can obtain the synchronization information carried by the PSS based on the PSS. Furthermore, the first signal may be carried in the first time unit of the N time units. Furthermore, the first time period is located between the first time unit and the other N-1 time units in the N units. In this way, the subsequent first communication device can receive the second signal through the first time period after the first time unit.

[0266] Optionally, the other N-1 time units are used to carry the SSS in the signal block; or, the other N-1 time units are used to carry information in the SSS and PBCH in the signal block. Specifically, the signal block sent by the first communication device may include SSS (or SSS and PBCH) in addition to PSS. In this way, the receiver of the signal block can obtain more synchronization information through SSS (or SSS and PBCH).

[0267] As an implementation example of implementation example B, as shown in Figure 5d, the signal block can be carried in 4 (i.e., N is taken as 4 as an example) time units. The time unit where the "receiving window" in the figure is located is not included in the time unit of the signal block, that is, the PSS is carried in the first time unit (the time unit located before the receiving window), the SSS is carried in the second time unit (the time unit located after the receiving window), and the PBCH is carried in the third time unit and the fourth time unit. Taking each time unit as an example of a symbol, compared with the SSB shown in Figure 5a, the SSB in Figure 5a can be split. In addition, the receiving window can be located at two adjacent symbols of the PSS to avoid the inability to receive in the receiving window due to sending the PBCH or the inability to send the PBCH due to receiving in the receiving window.

[0268] As another implementation example of implementation example B, as shown in Figure 5e, the signal block can be carried in 2 (i.e., N is taken as 2 for example) time units. The time unit where the "receiving window" in the figure is located is not included in the time unit of the signal block, that is, the PSS is carried in the first time unit (the time unit before the receiving window), and the SSS is carried in the second time unit (the time unit after the receiving window). Compared with the example shown in Figure 5d, the PBCH in Figure 5d can be discarded in Figure 5e.

[0269] It should be understood that in the example shown in Figure 5e, the PSS is used as a sensing symbol, with a small number of sequences and low detection complexity. In the example shown in Figure 5d, the PBCH is located at the end of the signal block, and channel estimation using the PSS or SSS can be used for channel demodulation.

[0270] In implementation example 2, in step S202, the first communication device may use a first time period for receiving the second signal to include two separated time units, and the two end time units are respectively continuous time units in the time domain.

[0271] For example, as shown in FIG6a , the first signal may include signal 1_1 and signal 1_2 in FIG6a . In step S201, these two signals are transmitted through transmitting window 1 and transmitting window 2 in FIG6a , respectively. The second signal may include signal 2_1 and signal 2_2 in FIG6a . In step S202, these two signals are received through receiving window 1 and receiving window 2 in FIG6a , respectively. It should be noted that a GP may be configured between adjacent transmitting and receiving windows (e.g., between transmitting window 1 and receiving window 1, or between transmitting window 2 and receiving window 2), and this GP may be implemented in various ways. For details, please refer to the implementation processes shown in FIG4a through FIG4d above.

[0272] As an implementation example of implementation example 2, the first signal may include the PSS and SSS in the signal block, and the second signal includes the echo signal of the PSS and the echo signal of the SSS; wherein the time domain position of the time domain resource carrying the PSS is located before the time domain position of the time domain resource used to carry the echo signal of the PSS in the first time period, and the time domain position of the time domain resource carrying the SSS is located before the time domain position of the time domain resource used to carry the echo signal of the SSS in the first time period. Specifically, the first signal may include the PSS and SSS in the signal block, and accordingly, the second signal serves as the echo signal of the first signal, and the second signal may include the echo signal of the PSS and the echo signal of the SSS. In this way, the first communication device realizes perception in two time units that are respectively continuous in the time domain to improve perception performance.

[0273] It should be understood that the first communication device can receive the second signal within the first time period. When the second signal may include the echo signal of the PSS and the echo signal of the SSS, the first communication device can respectively realize the reception of these two echo signals in two time units that are consecutive in the time domain.

[0274] Optionally, the time domain position of the time domain resource used to carry the echo signal of the PSS in the first time period is located before the time domain position of the time domain resource carrying the SSS. Specifically, the first communication device can send the SSS after receiving the echo signal of the PSS. In this way, the receiver of the first signal (such as the third communication device in Figure 3) can obtain the PSS and then receive the SSS based on the PSS, which can improve the success rate of receiving the SSS.

[0275] Exemplarily, as shown in Figure 6b, compared with the implementation shown in Figure 5a, the PBCH can be discarded, and after the PSS in the first signal is sent, the first communication device can receive the echo signal corresponding to the PSS within the receiving window corresponding to the PSS, and after the SSS in the first signal is sent, the first communication device can receive the echo signal corresponding to the SSS within the receiving window corresponding to the SSS.

[0276] In one possible implementation, the signal block also includes a PBCH; the time domain resources of the PBCH include at least one of the following: a time domain resource carrying the PSS, a time domain position of the time domain resource carrying the SSS, one or more time units before the time domain position of the time domain resource carrying the PSS, and one or more time units after the time domain position of the time domain resource carrying the SSS. Specifically, the signal block sent by the first communication device may also include a PBCH, so that the recipient of the first signal (such as the third communication device in Figure 3) can obtain the system information carried by the PBCH based on the PBCH. In addition, the PBCH can be carried by at least one of the above resources, which can enhance the flexibility of the solution implementation.

[0277] For example, as shown in Figure 6c, after the PSS in the first signal is transmitted, the first communications device can receive an echo signal corresponding to the PSS within the receive window corresponding to the PSS. After the SSS in the first signal is transmitted, the first communications device can receive an echo signal corresponding to the SSS within the receive window corresponding to the SSS. Furthermore, compared to the implementation shown in Figure 6b, the PBCH includes several parts, one of which is carried in the same time domain location as the PSS, and the other parts are carried in the same time domain location as the SSS.

[0278] It can be understood that in the implementation example shown in Figure 6c, using both the PSS and SSS as sensing signals helps improve the perceived signal quality and enhance perception accuracy. Furthermore, compared to the implementation example shown in Figure 5a, in the examples shown in Figures 6b and 6c, since the signal block does not need to carry the PBCH in time units other than the time units where the PSS or SSS is located, the PBCH resource location can be configured as the PSS reception window.

[0279] For another example, as shown in Figure 6d, after the PSS in the first signal is transmitted, the first communications device can receive an echo signal corresponding to the PSS within a receiving window corresponding to the PSS. After the SSS in the first signal is transmitted, the first communications device can receive an echo signal corresponding to the SSS within a receiving window corresponding to the SSS. Furthermore, compared to the implementation shown in Figure 6c, the PBCH can also include more information, which can be carried in one or more time units before the PSS.

[0280] For another example, as shown in Figure 6e, after the PSS in the first signal is transmitted, the first communications device can receive an echo signal corresponding to the PSS within the receive window corresponding to the PSS. After the SSS in the first signal is transmitted, the first communications device can receive an echo signal corresponding to the SSS within the receive window corresponding to the SSS. Furthermore, compared to the implementation shown in Figure 6c, the PBCH can also include more information, which can be carried in one or more time units after the time window corresponding to the SSS.

[0281] It can be understood that in the implementation examples shown in Figures 6d and 6e, the PSS position remains unchanged, the SSS position shifts backward, the PBCH position shifts forward or backward, and the receive window is configured after the PSS / SSS. The advantage of the implementation example shown in Figure 6d is that time expansion of the SSS receive window does not affect PBCH resources. The advantage of the implementation example shown in Figure 6e is that the PBCH channel estimate can be obtained using the PSS and SSS, eliminating the need to pre-store and wait for PSS and SSS reception.

[0282] It should be understood that in the above description, a signal block including one or more items of the PSS, SSS, or PBCH is considered as a whole, and various implementations of the relationship between the signal block and the receive window are described. In actual applications, one or more items of the PSS, SSS, or PBCH and the receive window can also be considered as a whole. This will be described below with reference to more implementation examples.

[0283] In one possible implementation, the first signal and the second signal are carried in M ​​time units, where M is an integer greater than or equal to 1; wherein, N time units among the M time units are used to carry signal blocks, the starting time unit of the M time units and the starting time unit of the N time units are the same time unit, and M is greater than N. Specifically, the first signal sent by the first communication device and the second signal received by the first communication device can be carried in M ​​time units, that is, the first communication device can complete the sending and perception of the synchronization signal within the M time units. In addition, N time units among the M time units are used to carry signal blocks, and the starting time unit of the M time units and the starting time unit of the N time units are the same time unit, so that the receiver of the signal block can obtain the synchronization information carried by the signal block as early as possible within the M time units.

[0284] For example, in the example shown in the aforementioned Figure 4a, the sending window and the receiving window can be regarded as a whole, that is, the time unit occupied by the whole can be M time units, the sending window occupies N time units, and the starting time unit of the whole is the same as the starting time unit of the sending window.

[0285] In one possible implementation, the N time units are continuous time units in the time domain. In this case, the first time period for receiving the second signal can be implemented in a variety of ways:

[0286] Mode 1: In the M time units, the other MN time units located after the N time units are used to carry the second signal. Taking Figure 4a as an example, the other MN time units are the receiving window in Figure 4a, and the receiving window can be the first time period for receiving the second signal.

[0287] Method 2. Within the M time units, the other MN time units following the N time units are used to carry the GP and the second signal. For example, using FIG. 4b as an example, some of the other MN time units are the first time period for receiving the second signal, and the time domain resources carrying the GP are adjacent to the N time units (i.e., the sending window in FIG. 4b is adjacent to the GP).

[0288] Mode 3. Within the M time units, the P time units adjacent to the N time units are used to carry the GP, and the MNP time units following the P time units are used to carry the second signal. For example, using FIG. 4d as an example, the MNP time units are the first time period for receiving the second signal (i.e., the time interval P between the sending window and the receiving window in FIG. 4d is used for the GP), where P is a positive integer.

[0289] In addition, when one or more of PSS, SSS or PBCH and the receiving window are regarded as a whole (i.e., M time units), if the first signal includes PSS and / or SSS, then PSS and / or SSS may also have corresponding multiple implementation methods, which will be further described below with reference to some implementation examples.

[0290] As an implementation example of implementation example A, the first signal includes an SSS, and the SSS is carried in the last time unit of the N time units. Specifically, the first signal may include the SSS, so that the receiver of the first signal (for example, the third communication device in Figure 3) can obtain the synchronization information carried by the SSS based on the SSS. Moreover, in the M time units, the first signal can be carried in the last time unit of the N time units. In this way, the subsequent first communication device can receive the second signal through the first time period after the N time units.

[0291] For example, taking the receive window occupying two time units as an example, in the example shown in Figure 5b above, if each time unit is one symbol, then one or more of the PSS, SSS, or PBCH and the receive window can be considered as a whole, that is, the whole can include 6 (M is 6) symbols in Figure 5b, and the signal block can include 4 symbols, and these 4 symbols are the same as the starting symbol of the 6 symbols. In Figure 5b, the SSS is located at the last symbol of the 4 symbols.

[0292] Optionally, the SSS is included in a signal block, which also includes a PSS; as shown in the example of Figure 5b, the PSS can be carried in the first time unit of the N time units, or, as shown in the example of Figure 5c, the PSS is carried in the last time unit of the N time units. Specifically, the signal block sent by the first communication device may also include a PSS, so that the recipient of the first signal (for example, the third communication device in Figure 3) can obtain the synchronization information carried by the PSS based on the PSS. Moreover, the PSS can be carried in the first time unit of the N time units. In this way, in addition to being able to obtain the synchronization information carried by the PSS based on the PSS, the recipient of the signal block can also parse other information of the signal block (for example, SSS and / or PBCH) based on the synchronization information carried by the PSS to improve the success rate of receiving the other information. In addition, the PSS can also be carried in the last time unit of the N time units to improve the flexibility of the solution implementation and reduce latency and energy consumption.

[0293] In one possible implementation, the signal block also includes a PBCH; as shown in the example of FIG5b , the PSS in the signal block is carried in the first time unit of the N time units, and the PBCH is carried in the remaining N-1 time units of the N time units except the first time unit; or, as shown in the example of FIG5c , the PSS in the signal block is carried in the last time unit of the N time units, and the PBCH is carried in the N time units. Specifically, when the first signal sent by the first communication device includes the PSS and SSS in the signal block, the signal block may further include a PBCH, and the PBCH is carried in N-1 time units or N time units, so that as many time units as possible can be used to carry the PBCH to carry more information.

[0294] It should be noted that the PSS / SSS / PBCH contained in the signal block can also refer to the implementation method shown in Figure 5d or Figure 5e above.

[0295] In one possible implementation, among M time units, the N time units used to carry signal blocks include k time units and Nk time units, the k time units are continuous time units in the time domain, the Nk time units are continuous time units in the time domain, the starting time unit of the k time units and the starting time unit of the M time units are the same time unit, the ending time unit of the Nk time units and the ending time unit of the M time units are the same time unit, and k is a positive integer.

[0296] For example, as shown in FIG. 6a above, k of the N time units may be time units included in sending window 1 in FIG. 6a , and Nk of the N time units may be time units included in sending window 2 in FIG. 6a . In other words, the signals carried by the signal block may include signal 1_1 sent via sending window 1 and signal 1_2 sent via sending window 2. Accordingly, the first time period may include receiving window 1 and receiving window 2 in FIG. 6a , meaning that the first communications device may receive two signals in receiving window 1 and receiving window 2, respectively.

[0297] Similarly, in this case, the first time period for receiving the second signal can be implemented in multiple ways:

[0298] Mode 4: Among the M time units, the other MN time units except the N time units are used to carry the second signal (ie, the first time period).

[0299] Mode 5. Among the M time units, the other MN time units except the N time units are used to carry the GP and the second signal (ie, the first time period), and the time domain resource carrying the GP is adjacent to the k time units.

[0300] Mode 6: Among the M time units, the P time units adjacent to the k time units are used to carry the GP, and the MNP time units after the P time units are used to carry the second signal (ie, the first time period), where P is a positive integer.

[0301] Specifically, the N time units used to carry signal blocks can include two time units that are continuous in the time domain, and the M time units can also carry GP through the above-mentioned multiple methods, so that the scheme can be applied to half-duplex scenarios, and the first communication device can perform transmit and receive conversion within the GP time interval to improve the reception success rate of the first communication device receiving the second signal.

[0302] As an implementation example, the first signal includes the SSS and PSS in the signal block; the SSS in the signal block is carried in the first time unit of the Nk time units, and the PBCH in the signal block is carried in the N time units. Specifically, the first signal may also include the SSS and PSS in the signal block, and the SSS in the signal block is carried in the first time unit of the Nk time units, and the PBCH in the signal block is carried in the N time units. In this way, the first communication device can realize perception in two time units that are respectively continuous in the time domain to improve perception performance. Among them, the SSS and PSS in the N time units can refer to the implementation methods shown in Figures 6b to 6e above.

[0303] It should be noted that the implementation examples shown in Figures 5a to 5e, and Figures 6b to 6e above are based on the implementation process where the first signal includes PSS / SSS in SSB. That is, in the above implementation examples, the signal block used to carry the first signal can be SSB (or a signal block containing SSB). As mentioned above, the signal block can also have other implementations. The following will exemplarily describe the implementation case where the signal block is SL-SSB (or the signal block is a signal block containing SL-SSB) through more implementation examples.

[0304] It should be understood that in the following Figures 6f to 6n, a time slot containing 14 symbols (ie, the corresponding CP is a normal CP) is taken as an example.

[0305] As shown in Figure 6f, in traditional SL-SSB, the physical sidelink broadcast channel (PSBCH) occupies 10 symbols, from symbol 0 to symbol 5 to symbol 12. The last symbol is a gap (GAP), which can be used for automatic gain control (AGC) switching or protection time for transceiver switching. In addition, the sidelink primary synchronization signal (SL-PSS or S-PSS) is repeatedly transmitted, occupying the second and third symbols (i.e., symbols 1 and 2 in the figure); the sidelink secondary synchronization signal (SL-SSS or S-PSS) is repeatedly transmitted, occupying the fourth and fifth symbols (i.e., symbols 3 and 4 in the figure).

[0306] As implemented above, the first signal may include S-PSS and / or S-SSS in SL-SSB. Some implementation examples will be provided below to exemplarily describe various implementations of the first signal.

[0307] As shown in Figure 6g, when the S-SSS is used as the perception signal (i.e., the first signal includes the P-SSS), a receive window can be added after the S-SSS, occupying two PSBCH symbols. In other words, the PSBCH in symbols 5 and 6 in Figure 6f is replaced by a receive window.

[0308] In the example shown in Figure 6h, compared to the example shown in Figure 6g, the PSBCH symbols can be extended to the next time slot, keeping the total number of PSBCH symbols unchanged. In other words, two symbols are inserted after symbol 4 in Figure 6f as a receive window, and the information carried by symbols 5 to 13 in Figure 6f is extended backward to obtain symbols 7 to 15 in Figure 6h. In addition, according to the symbol index notation of a time slot of 14 symbols, symbols 14 and 15 here correspond to symbol indices 0 and 1 of the next sidelink time slot.

[0309] In the example shown in Figure 6i, where both S-SSSs are used as sensing signals, the second sensing signal needs to be shifted back, and a receiving time window is added after each of the two S-SSSs. Each receiving window occupies two symbols, resulting in five available PSBCH symbols. In other words, the S-SSS in symbol 4 and the PSBCH in symbol 5 in Figure 6f are replaced with a receiving window of two symbols, and the PSBCH in symbols 6 through 8 in Figure 6f are replaced with a S-SSS of one symbol and a receiving window of two symbols.

[0310] In the example shown in Figure 6j, compared to the example shown in Figure 6i, the symbols used by the PSBCH can be extended to the next time slot, keeping the total number of PSBCH symbols unchanged. In other words, two symbols are inserted after symbol 3 in Figure 6f as a receive window, and two symbols are inserted after symbol 4 in Figure 6f as a receive window. The information carried by the original symbols 5 to 13 in Figure 6f is extended backward to obtain symbols 9 to 17 in Figure 6j. In addition, according to the symbol index notation of a time slot of 14 symbols, symbols 14 to 17 here correspond to symbol indices 0 to 3 of the next sidelink time slot.

[0311] As shown in Figure 6k, two consecutive S-SSSs are used as sensing signals, and three symbols are reserved after the last S-SSS as the receiving window. In other words, the PSBCH from symbols 5 to 7 in Figure 6f is replaced by the receiving window.

[0312] In the example shown in Figure 6l, compared to the example shown in Figure 6k, the PSBCH symbols can be extended to the next time slot, keeping the total number of PSBCH symbols unchanged. In other words, three symbols are inserted after symbol 4 in Figure 6f as a receive window, and the information carried by symbols 5 to 13 in Figure 6f is extended backward to obtain symbols 8 to 16 in Figure 6h. In addition, according to the symbol index notation of a time slot of 14 symbols, symbols 14 to 16 here correspond to symbol indices 0 to 2 of the next sidelink time slot.

[0313] As shown in Figure 6m, the last S-PSS and last S-SSS are used as sensing signals, and a sensing window is reserved after them, resulting in a reduction in the number of symbols available for the PSBCH. In other words, the S-SSS in symbols 3 and 4 in Figure 6f is replaced with a 2-symbol reception window. Furthermore, symbols 5 and 6 in Figure 6f are replaced with a 2-symbol S-SSS, and the PSBCH in symbols 7 and 8 in Figure 6f is replaced with a 2-symbol reception window.

[0314] In the example shown in Figure 6n, compared to the example shown in Figure 6m, the PSBCH symbols can be extended to the next time slot, keeping the total number of PSBCH symbols unchanged. In other words, two symbols are inserted after symbol 2 in Figure 6f as a receive window, and two symbols are inserted after symbol 4 in Figure 6f as a receive window. The information carried by symbols 5 to 13 in Figure 6f is then extended to obtain symbols 9 to 17 in Figure 6j. In addition, according to the symbol index notation of a time slot of 14 symbols, symbols 14 to 16 here correspond to symbol indices 0 to 3 of the next sidelink time slot.

[0315] Similarly, part or all of the S-PSS and / or part or all of the S-SSS can be used as perception signals, that is, the first signal can include part or all of the S-PSS and / or part or all of the S-SSS. In this way, perception can be achieved in a scenario where the signal block is SL-SSB (or the signal block includes SL-SSB), so that the solution can be applied to the side link scenario. In other words, the first communication device that sends the first signal in step S01 can be a terminal device or a terminal communication perception fusion device, etc.

[0316] It should be noted that in Figures 6f to 6n, the various signals in the SL-SSB (e.g., S-PSS / S-SSS / PSBCH) can refer to the description of the various signals in the SSB (PSS / SSS / PBCH) in the previous text. In addition, the receiving window in Figures 6f to 6n can also refer to the description of the receiving window (or first time period) in the previous implementation example.

[0317] As described above, the first signal may be part of a signal block. In other words, the first communication device may transmit a signal block in step S201, where the signal block includes the first signal. The signal block includes information used for synchronization (e.g., PSS and / or SSS). For this reason, the signal block may also be referred to as a synchronization signal block. Generally, to increase the implementation flexibility of signal blocks, they may be transmitted via a signal block set. The following describes the implementation of a signal block set in conjunction with more implementation examples.

[0318] In a possible implementation, the signal block containing the first signal sent by the first communication device in step S201 may be one of the signal blocks in the signal block set. Accordingly, as shown in FIG3 , the method may further include:

[0319] Step B: The second communication device sends second configuration information, and correspondingly, the first communication device receives the second configuration information, where the second configuration information is used to configure the signal block set.

[0320] Optionally, the second configuration information includes at least one of the following: information for determining time domain resources of a signal block set, information for determining frequency domain resources of the signal block set, subcarrier spacing (SCS) configuration information, cyclic prefix (CP) configuration information, configuration information of the first time period, transmit beam information for transmitting signal blocks in the signal block set, or receive beam information for echo signals of part or all of the signals in the signal blocks in the signal block set. In this way, multiple perceptions can be achieved through the transmission of multiple signal blocks to improve perception performance.

[0321] Furthermore, different signal blocks in a signal block set can be transmitted via different communication beams. Therefore, the first communication device can achieve perception in different beam directions based on the perception of different signal blocks transmitted via different communication beams, thereby enhancing high-precision perception. Furthermore, the number of repetitions of the same signal block in a signal block set via the same beam can be configured to improve perceived signal reception quality and enhance perception performance.

[0322] In this application, the signal block set (set) can be replaced by other terms, for example, signal block burst (burst), signal block burst set (burst set), etc.

[0323] Optionally, the signal block set may include multiple signal blocks. Further, the signal block set may include multiple signal blocks on the same frequency band. In other words, multiple signal blocks in the same signal block set may be transmitted using the same frequency domain resources to reduce implementation complexity and conserve communication resources.

[0324] Optionally, multiple signal blocks included in the same signal block set may be transmitted using different parameters. For example, different signal blocks may correspond to different sensing tasks, such as different sensing distances, sensing ranges, sensing delays, and sensing angles. Exemplarily, when different signal blocks are transmitted using different parameters, the parameters may specifically include SCS, CP, the duration of the receive window, and the beam pair of the transmit beam and the receive beam.

[0325] Optionally, in addition to the sending window or sending symbol, CP and receiving window or receiving symbol, the signal block may also include control information, which may indicate the signal parameters of the current signal block, such as SCS, CP length, GP length, time length of the receiving window, etc.

[0326] For example, as shown in FIG7a, an implementation example is provided, in which a signal block is a sensing block and a signal block set is an SEB block (SEB set). In FIG7a, the same SEB set may include SEBs with two types of parameters, such as SEB subset 1 (subset1) and SEB subset 2 (subset2) in the figure. The resources or candidate resources of the SEB set may be configured by high-layer signaling carrying second configuration information, such as RRC signaling, LTE positioning protocol (LPP) signaling, or NR positioning protocol a (NRPPa) signaling.

[0327] It should be noted that, among the multiple signal blocks included in the signal block set, at least some of the signal blocks are implemented in various ways through the above-mentioned signal blocks containing the first signal (for the convenience of subsequent reference, they are hereinafter referred to as first-type signal blocks). For other signal blocks in the signal block set, the other signal blocks can be implemented in various ways through the above-mentioned first-type signal blocks, or the other signal blocks can also be implemented through traditional SSB (for example, the SSB resource pattern shown in Figure 5a, for the convenience of subsequent reference, they are hereinafter referred to as second-type signal blocks). This will be introduced below through some implementation examples.

[0328] Implementation method A: Among the multiple signal blocks included in the signal block set, at least some signal blocks are implemented through multiple methods of the above-mentioned first-type signal blocks. For other signal blocks in the signal block set, the other signal blocks can also be implemented through the second-type signal blocks.

[0329] Optionally, in implementation method A, the first type of signal block and the second type of signal block can be distinguished by waveform. For example, the first type of signal block and the second type of signal block are any two of the following different waveforms: OFDM, single carrier, frequency modulated continuous wave (FMCW), orthogonal time frequency space (OTFS), single carrier offset orthogonal amplitude modulation (SC-OQAM), filter bank multicarrier-offset quadrature amplitude modulation FBMC-OQAM (filter bank multicarrier-offset quadrature amplitude modulation), orthogonal frequency division multiplexing-offset quadrature amplitude modulation (OFDM-OQAM, orthogonal frequency division multiplexing-offset quadrature amplitude modulation), etc.

[0330] Optionally, in implementation A, if the signal block is an SSB (or used to carry PSS / SSS / PBCH in an SSB), since the time domain symbols occupied by the signal block may be greater than 4 symbols (for example, the implementation examples shown in Figures 5b, 5d, 6d, or 6e above), and other symbols other than the 4 symbols are used as receiving windows, this may cause conflicts with the symbols of other SSBs in adjacent beams. For this reason, some SSBs in the SSB set can be used as first-class signal blocks, and other SSBs as second-class signal blocks, and they can be distinguished by SSB indexes. This will be described below in conjunction with some implementation examples.

[0331] For example, for the second type of signal block, the starting symbol position of each candidate SSB when the SCS is 240 kHz is shown in Table 2. Taking type E (Case E) of SSB in NR as an example, which corresponds to 240 kHz SCS: the index X of the first symbol of the candidate SSB satisfies: X = {8, 12, 16, 20, 32, 36, 40, 44} + 56*n;

[0332] Among them, n takes values ​​of 0, 1, 2, 3, 5, 6, 7, and 8.

[0333] Table 2

[0334] As can be seen from Table 2, the starting symbol interval of many candidate SSBs is 4 symbols, that is, the candidate positions of the previous and next SSBs are adjacent. As can be seen from the previous example, for the first type of signal block, a conflict may occur when the interval with the adjacent SSB is 4 symbols. Further observation shows that in Table 2, when 64 SSB beams are enabled, except for the fifth column of data (i.e., the column where the value is "20" when n=0) and the ninth column of data (i.e., the column where the value is "44" when n=0), the other SSBs are adjacent to the next SSB, that is, in the time domain, the symbols of the SSBs corresponding to the other columns of data are continuous with the adjacent SSBs.

[0335] In one possible implementation, when the SSB is configured with 64 beams, the SSBs corresponding to the fifth column of data (i.e., the column where the value is "20" when n=0) and the ninth column of data (i.e., the column where the value is "44" when n=0) (a total of 16 SSBs) can be selected as the first type of SSB, and the SSBs corresponding to the other columns of data (a total of 48 SSBs) can be selected as the second type of SSB.

[0336] In another possible implementation, when the SSB is configured with 32 beams, the SSB corresponding to the second column of data (i.e., the column where the value is "8" when n=0), the SSB corresponding to the fourth column of data (i.e., the column where the value is "16" when n=0), the SSB corresponding to the sixth column of data (i.e., the column where the value is "32" when n=0), and the SSB corresponding to the eighth column of data (i.e., the column where the value is "40" when n=0) (a total of 32 SSBs) can be selected as the first type of SSB, and the SSB corresponding to other columns of data (a total of 32 SSBs) can be selected as the second type of SSB.

[0337] In another possible implementation, when the SSB is configured with 32 beams, the SSB corresponding to the third column of data (i.e., the column where the value is "12" when n=0), the SSB corresponding to the fifth column of data (i.e., the column where the value is "20" when n=0), the SSB corresponding to the seventh column of data (i.e., the column where the value is "36" when n=0), and the SSB corresponding to the ninth column of data (i.e., the column where the value is "44" when n=0) (a total of 32 SSBs) can be selected as the first type of SSB, and the SSB corresponding to other columns of data (a total of 32 SSBs) can be selected as the second type of SSB.

[0338] It should be noted that in Table 2, only the implementation process of SCS of 240KHz is used as an example. In actual applications, the index table of SSB corresponding to other SCS values ​​(such as 30kHz SCS, 120kHz SCS, etc.) can also be improved. For example, the data of some columns of the table can be selected as the first type of signal block, and the data of other columns can be used as the second type of signal block.

[0339] In implementation manner B, among the multiple signal blocks included in the signal block set, different signal blocks are all implemented as first-category signal blocks.

[0340] In a possible implementation of implementation B, in the signal block set, the interval between the signal block and the adjacent signal block is greater than 4 symbols. Exemplarily, as shown in FIG4a above, when the signal block is an SSB, the number of symbols occupied by one SSB in the NR system is 4. To this end, in order to configure the first time period (i.e., receiving window) for receiving the second signal, in the signal block set, the interval between the signal block and the adjacent signal block is greater than 4 symbols, and the other symbols other than the 4 symbols are used as the first time period (i.e., receiving window) for receiving the second signal. Compared with the traditional 4-symbol interval between different SSBs, the configuration of the first time period can be achieved through a larger time interval, so as to achieve perception through the second signal received in the first time period, reduce interference in the perception process, and achieve perception in a half-duplex scenario or mode.

[0341] In addition, as can be seen from the implementation process of the aforementioned implementation method A, when a larger number of SSBs is configured, the use of the extended symbol after the SSS as the receiving window may cause resource conflicts with the first type of signal block and other SSBs. Therefore, it is necessary to optimize the candidate position of the SEB or the candidate position of the enhanced SSB to avoid interference between the front and rear SSBs. Generally, related to the SCS size and carrier frequency, within a time window of half a frame (i.e., 5ms), corresponding to one SSB burst or SSB set, the SSB in NR supports different time domain positions and SSB number configurations. For example, carriers with frequencies below 3GHz support a maximum of 4 SSBs, carriers with frequencies between 3 and 6GHz support a maximum of 8 SSBs, and carriers with frequencies between 6 and 52.6GHz support a maximum of 64 SSBs. Some index configuration examples for implementation method B are given below.

[0342] As another implementation example, the subcarrier spacing of the signal blocks in the signal block set is 240kHz, and the starting symbol index X of the signal blocks in the signal block set satisfies: X={8,16,32,40}+56*n, n=0,1,2,3,5,6,7,8,10,11,12,13,15,16,17,18.

[0343] For example, the implementation process of X satisfying X={8, 16, 32, 40}+56*n will be described below with reference to Table 2.

[0344] Table 3

[0345] As shown in Table 3, the values ​​for each entry are the starting symbol positions of each candidate SSB within a 5ms half-frame (240kHz SCS). Index 0 corresponds to the first symbol of the first slot within the half-frame. For a normal CP, one slot contains 14 symbols. As shown in Table 2, indexes 0 to 8, or from the first symbol 8 to the first symbol 488, correspond to the first 3ms of the 5ms detection window when the SCS is 240kHz in Table 2. Four slots correspond to eight SSB positions, or one slot contains two SSBs. In Table 3, the index of the first symbol of a candidate SSB (or signal block) is {8, 16, 32, 40} + 56*n. The values ​​of index n are n = 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18. The index can be further expressed as {x1,x2,x3,x4}+56*n, where the value of index n is n=0,1,2,3,5,6,7,8,10,11,12,13,15,16,17,18, and x1,x2,x3,x4 are 4 numbers selected from the set {8,12,16,20,32,36,40,44} in ascending order. That is, another group of first symbol indexes is {12,20,36,44}.

[0346] In other words, through the method of Table 3, the implementation process of configuring a first-class signal block in one time slot can be realized, so that the interval between any two adjacent SSBs is greater than 4 symbols to support the implementation process of the receiving window.

[0347] Optionally, the implementation shown in Table 3 can be adapted to the implementation of symbol placement control information in front of the SSB.

[0348] As another implementation example, the subcarrier spacing of the signal blocks in the signal block set is 240kHz, and the starting symbol index X of the signal blocks in the signal block set satisfies (hereinafter referred to as Method 1): X = {6, 12, 18, 24, 32, 38, 44, 50} + 56*n, n = 0, 1, 2, 3, 5, 6, 7, 8.

[0349] From the above implementation, we can see that, considering configuring two first-class signal blocks in one slot, the first symbol corresponding to each first-class signal block is {6, 12, 18, 24, 32, 38, 44, 50} + 56*n, where n = 0, 1, 2, 3, 5, 6, 7, 8.

[0350] As another implementation example, the subcarrier spacing of the signal blocks in the signal block set is 240kHz, and the starting symbol index X of the signal blocks in the signal block set satisfies (hereinafter referred to as method 2): {2,8,16,22,30,36,44,50}+56*n,n=0,1,2,3,5,6,7,8.

[0351] From the above implementation, it can be seen that considering 1 slot to configure the first-class signal block, the first symbol corresponding to each first-class signal block is {2, 8, 16, 22, 30, 36, 44, 50} + 56*n, n = 0, 1, 2, 3, 5, 6, 7, 8.

[0352] One difference between Method 1 and Method 2 is that the SSB or SEB is placed at the end of the symbol position close to the beginning of the slot. According to the end positions of the first four slots (13, 27, 41, 55) and the starting positions (0, 14, 28, 42), it can be seen that the first symbol of the third slot in Method 1 corresponds to 44, while Method 2 places it at the beginning, such as the first symbol position 2 of the first slot. Both methods can avoid interference between the previous and next SSBs.

[0353] As an implementation example, the subcarrier spacing of the signal blocks in the signal block set is 30 kHz, and the starting symbol index X of the signal blocks in the signal block set satisfies: X={2,8,16,22}+28*n, n=0 or 0,1.

[0354] From the above implementation, it can be seen that the value of the above X satisfies that one slot contains two first-class signal blocks. Compared with the original SSB candidate position, the middle distance is enlarged, and the first symbol index of the candidate SSB or SEB corresponds to {2, 8, 16, 22} + 28 * n, n = 0 or 0, 1.

[0355] As an implementation example, the subcarrier spacing of the signal blocks in the signal block set is 30 kHz, and the starting symbol index X of the signal blocks in the signal block set satisfies: X={4,16}+28*nn=0,1 or 0,1,2,3.

[0356] From the above implementation, it can be seen that the value of X satisfies that one slot contains one first-class signal block, {4,16}+28*nn=0,1 or 0,1,2,3, which can satisfy that each symbol is in a 5ms window (140 symbols), both of which can avoid interference from the previous and next SSBs.

[0357] As another implementation example, the subcarrier spacing of the signal blocks in the signal block set is 120 kHz, and the starting symbol index X of the signal blocks in the signal block set satisfies: X={2, 8, 16, 22}+28*n, n=0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18;

[0358] From the above implementation, it can be seen that the value of X satisfies the requirement that one slot contains two first-class signal blocks.

[0359] It should be understood that when the SCS of Case A is 15KHz (or 30KHz for Case C or 480KHz for Case F and 960KHz for Case G), different SSBs are spaced 6 or 7 symbols apart, which can basically meet the requirements of the first type of signal block for the receiving window of the extended symbols.

[0360] Based on the above technical solution, in the signal block set, the starting symbol indexes of different signal blocks meet one or more of the above conditions. In this way, the configuration of the first time period can be achieved through a larger time interval, so as to achieve perception through the second signal received in the first time period, reduce interference in the perception process, and achieve perception in a half-duplex scenario or mode.

[0361] In a possible implementation, as shown in FIG3 , the method may further include:

[0362] Step C. The second communication device sends third configuration information, and accordingly, the first communication device receives the third configuration information, where the third configuration information includes at least one of the following: configuration information of the SCS of the first signal, configuration information of the time domain resources carrying the first signal, configuration information of the CP length, configuration information of the GP length, configuration information of the time domain resources carrying the first signal and the second signal, and configuration information for configuring the first time period. Specifically, the first communication device may also receive the third configuration information and, based on the third configuration information, execute the transmission of the first signal and the reception of the second signal to implement the above-mentioned perception process.

[0363] Optionally, the third configuration information in step C and at least two of the first configuration information in step A and the second configuration information in step B can be carried in the same configuration message or in different configuration messages, which is not limited here. It should be understood that when the at least two configuration information are carried in the same configuration message, the same configuration information can be carried in one copy. For example, when the at least two configuration information include the first configuration information and the third configuration information, both the first configuration information and the third configuration information can include configuration information for configuring the first time period. Accordingly, the same configuration message can carry one copy of the configuration information for the first time period.

[0364] As can be seen from the above implementation process, the first signal can be implemented in various ways, and the first signal can be part of a signal block. Accordingly, as the receiver of the first signal, as shown in Figure 3, the third communication device can receive the signal block in step S201 and parse the first signal including the PSS / SSS based on the signal block. Some implementation examples will be described below.

[0365] In one possible implementation, in step S201, the third communication device may receive the PSS in the signal block in a second time period (the second time period may be understood as a receiving window for the third communication device to receive the signal block), and the first signal is used for synchronization; within the second time period, the third communication device receives the SSS and / or PBCH in the signal block based on the PSS; wherein the echo signal of the PSS and / or SSS is used for perception.

[0366] It should be noted that, for one or more of the PSS, SSS or PBCH in the signal block, reference may be made to the description of any of the above implementations.

[0367] Optionally, the third communication device may receive one or more of the first configuration information, the second configuration information, or the third configuration information, and receive information in the signal block based on the one or more configuration information. Implementation of these configuration information may refer to the implementation process described above.

[0368] As an implementation example, within the second time period, the third communication device may also receive the SSS and / or PBCH in the signal block based on the PSS.

[0369] For example, during the second time period, the third communication device blindly detects the SSS and / or PBCH in the signal block based on the PSS. Specifically, during the second time period, after the third communication device receives the PSS in the signal block, since the SSS and / or PBCH in the signal block have multiple positional relationships, the third communication device may perform blind detection on the SSS and / or PBCH in the signal block based on information obtained from the PSS to obtain the SSS and / or PBCH in the signal block.

[0370] For another example, during the second time period, the time domain position relationship between the PSS and the SSS is determined by the first information, and / or the time domain position relationship between the PSS and the SSS is determined by the second information. In other words, the third communication device can receive the SSS and / or PBCH based on the first information and / or the second information to improve the success rate of the third communication device receiving the SSS and / or PBCH.

[0371] Optionally, the PSS includes the first information and / or the second information. In this way, the third communication device can obtain the first information and / or the second information through the PSS, and further receive the SSS and / or PBCH based on the time domain position relationship determined by the first information and / or the second information.

[0372] Optionally, the first information and / or the second information may be carried in other information, such as one or more of the first configuration information, the second configuration information or the third configuration information.

[0373] As an application example, the scenario shown in Figure 7b includes core network equipment, access network equipment and terminal equipment. Among them, the access network equipment is a RAN network node, and the terminal equipment is a UE. In the methods shown in Figures 2 and 3 above, the first communication device can be a RAN network node, that is, the RAN network node can send a first signal and receive a second signal through the Uu interface for communicating with the UE to obtain a perception result; or, the first communication device can be a UE, that is, the UE can send a first signal and receive a second signal through the SL interface for communicating with other UEs to obtain a perception result. In addition, the core network device can include a network element for processing perception results. Among them, the SEMF network element can be used to implement perception management functions. For example, the SEMF network element can receive perception results from the RAN network node and / or UE, and synthesize and / or calculate based on the received perception results to obtain the results required by the perception target, such as geographic location, distance, speed, angle, map, posture, scale, imaging, material, etc.

[0374] As another application example, the scenario shown in Figure 7c includes an access network device and a terminal device. Among them, the access network device takes a RAN network node, and the terminal device takes a UE as an example. Among them, the UE may include a connectionless UE, such as a passive UE, an idle UE (idle UE), an inactive UE (inactive UE), a low-power UE, and a connected UE. Similarly, in the methods shown in Figures 2 and 3 above, the first communication device may be a RAN network node, that is, the RAN network node may send a first signal and receive a second signal through a Uu interface for communicating with the UE to obtain a perception result; or, the first communication device may be a UE, that is, the UE may send a first signal and receive a second signal through an SL interface for communicating with other UEs to obtain a perception result. In addition, the RAN network node or one of the UEs in Figure 7c can be used to implement the perception management function.

[0375] As another application example, in the scenario shown in Figure 7d, in the methods shown in Figures 2 and 3 above, the first communication device can include two transceiver modules (e.g., two hardware modules, two software modules, or two transceiver chips). These two transceiver modules are respectively labeled as control Tx / Rx and communication + perception Tx / Rx in the figure, with the latter used for both communication and perception. In the scenario shown in Figure 7d, it can be understood that the first communication device can implement a communication and perception fusion mode using two transceiver modules. In this mode, the SEMF network element interacts with the first communication device via the Uu interface, SL interface, F1 interface, or NG interface, for example, to exchange control and data, and report perception measurements, including both communication data and perception data, and both communication control information and perception control information. The SEMF network element can also communicate with other nodes and perform perception measurements. This mode maximizes the sharing of communication and perception hardware and software resources, as well as spectrum resources for communication and perception.

[0376] As another application example, in the scenario shown in Figure 7e, in the methods shown in Figures 2 and 3 above, the first communication device may include two sets of transceiver modules (for example, two sets of hardware modules, or two sets of software modules, or two sets of transceiver chips, etc.), and these two sets of transceiver modules are respectively recorded as control Tx / Rx and perception Tx / Rx in the figure, and the latter is used for perception. In the scenario shown in Figure 7e, it can be understood that the first communication device can implement a dedicated perception mode through two sets of transceiver modules. In this mode, the SEMF network element interacts with the first communication device through the Uu interface or SL interface or F1 interface or NG interface, etc., to perform perception control and data interaction, and perception measurement reporting. The first communication device can receive control information to complete perception measurement and reporting. The first communication device can use different waveforms such as OFDM, single carrier or frequency modulated continuous wave FMCW to send and receive perception signals.

[0377] Referring to FIG. 8 , an embodiment of the present application provides a communication device 800 , which includes a transceiver unit 801 and a processing unit 802 .

[0378] Optionally, the transceiver unit 801 may be replaced by an interface unit.

[0379] It should be understood that the communication device 800 can implement the functions of any communication device (e.g., the first communication device, the second communication device, or the third communication device) in the above-mentioned method embodiments, and thus can also achieve the beneficial effects of the above-mentioned method embodiments. In the embodiment of the present application, the communication device 800 can be any communication device in the above-mentioned method embodiments, or it can be an integrated circuit or component, such as a chip, within any communication device in the above-mentioned method embodiments.

[0380] In one possible implementation, when the device 800 is used to execute the method executed by the first communication device in the aforementioned embodiment, the processing unit 802 is used to determine the first signal, the transceiver unit 801 is used to send the first signal, and the first signal is used for synchronization; the transceiver unit 801 is also used to receive a second signal, which is an echo signal of the first signal, and the second signal is used for perception.

[0381] In another possible implementation, when the device 800 is used to execute the method executed by the network device in the aforementioned embodiment, the processing unit 802 is used to determine the first configuration information, and the first configuration information is used to configure the first time period; wherein the first time period is used to receive a second signal, the second signal is an echo signal of the first signal, the first signal is used for synchronization, and the second signal is used for perception; the transceiver unit 801 is used to send the first configuration information.

[0382] In another possible implementation, when the device 800 is used to execute the method executed by the terminal device in the aforementioned embodiment, the processing unit 802 is used to determine second configuration information, and the second configuration information is used to configure the signal block set; wherein, at least one signal block in the signal block set includes a first signal, the first signal is used for synchronization, the echo signal of the first signal is a second signal, and the second signal is used for perception; the transceiver unit 801 is used to send the second configuration information.

[0383] In another possible implementation, when the device 800 is used to execute the method executed by the network device in the aforementioned embodiment, the processing unit 802 is used to determine third configuration information, and the third configuration information is used to configure the first signal and / or the second signal; wherein the first signal is used for synchronization, the second signal is used for perception, and the second signal is an echo signal of the first signal; and the transceiver unit 801 is used to send the third configuration information.

[0384] In another possible implementation, when the device 800 is used to execute the method executed by the network device in the aforementioned embodiment, the transceiver unit 801 is used to receive the primary synchronization signal PSS in the signal block in the second time period, and the first signal is used for synchronization; the processing unit 802 is used to receive the secondary synchronization signal SSS and / or physical broadcast channel PBCH in the signal block based on the PSS within the second time period.

[0385] It should be noted that the information execution process of the units of the above-mentioned communication device 800 and the corresponding technical effects, etc., can be specifically referred to the description in the method embodiment shown above in this application, and will not be repeated here.

[0386] Please refer to Fig. 9, which is another schematic structural diagram of a communication device 900 provided in this application. The communication device 900 at least includes an input and output interface 901. The communication device 900 may be a chip or an integrated circuit.

[0387] Optionally, the communication device further includes a logic circuit 902 .

[0388] The transceiver unit 801 shown in FIG8 may be a communication interface, which may be the input / output interface 901 in FIG9 , which may include an input interface and an output interface. Alternatively, the communication interface may be a transceiver circuit, which may include an input interface circuit and an output interface circuit.

[0389] Among them, the logic circuit 902 and the input and output interface 901 can execute the method executed by any communication device (such as terminal equipment or network equipment) in the aforementioned method embodiments and achieve corresponding beneficial effects, which will not be repeated here.

[0390] In a possible implementation, the processing unit 802 shown in FIG. 8 may be the logic circuit 902 in FIG. 9 .

[0391] Optionally, the logic circuit 902 may be a processing device, and the functions of the processing device may be partially or entirely implemented by software. The functions of the processing device may be partially or entirely implemented by software.

[0392] Optionally, the processing device may include a memory and a processor, wherein the memory is used to store a computer program, and the processor reads and executes the computer program stored in the memory to perform corresponding processing and / or steps in any one of the method embodiments.

[0393] Alternatively, the processing device may include only a processor. A memory for storing the computer program is located outside the processing device, and the processor is connected to the memory via circuits / wires to read and execute the computer program stored in the memory. The memory and processor may be integrated or physically separate.

[0394] Optionally, the processing device may be one or more chips, or one or more integrated circuits. For example, the processing device may be one or more field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), system-on-chips (SoCs), central processor units (CPUs), network processors (NPs), digital signal processors (DSPs), microcontroller units (MCUs), programmable logic devices (PLDs), or other integrated chips, or any combination of the above chips or processors.

[0395] Please refer to FIG. 10 , which shows a communication device 1000 involved in the above embodiments provided in an embodiment of the present application. Specifically, the communication device 1000 may be a communication device serving as a terminal device in the above embodiments.

[0396] Herein, a possible logical structure diagram of the communication device 1000 is shown. The communication device 1000 may include but is not limited to at least one processor 1001 and a communication interface 1002 .

[0397] Further optionally, the device may also include at least one of a memory 1003 and a bus 1004. In an embodiment of the present application, the at least one processor 1001 is used to control and process the actions of the communication device 1000.

[0398] In addition, the processor 1001 can be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on. Those skilled in the art will clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0399] It should be noted that the communication device 1000 shown in Figure 10 can be specifically used to implement the steps implemented by the terminal device in the aforementioned method embodiment and achieve the corresponding technical effects of the terminal device. The specific implementation methods of the communication device shown in Figure 10 can refer to the description in the aforementioned method embodiment and will not be repeated here.

[0400] Please refer to Figure 11, which is a structural diagram of the communication device involved in the above embodiments provided in an embodiment of the present application. The communication device can specifically be the network device in the above embodiments, wherein the structure of the communication device can refer to the structure shown in Figure 11.

[0401] The communication device includes at least one processor 1111 and at least one network interface 1114 .

[0402] Optionally, the communication device further includes at least one memory 1112, at least one transceiver 1113 and one or more antennas 1115. The processor 1111, the memory 1112, the transceiver 1113 and the network interface 1114 are connected, for example, via a bus. In an embodiment of the present application, the connection may include various interfaces, transmission lines or buses, etc., which are not limited in this embodiment. The antenna 1115 is connected to the transceiver 1113. The network interface 1114 is used to enable the communication device to communicate with other communication devices through a communication link. For example, the network interface 1114 may include a network interface between the communication device and the core network device, such as an S1 interface, and the network interface may include a network interface between the communication device and other communication devices (such as other network devices or core network devices), such as an X2 or Xn interface.

[0403] Processor 1111 is primarily used to process communication protocols and communication data, control the entire communication device, execute software programs, and process software program data, for example, to support the communication device in performing the actions described in the embodiments. The communication device may include a baseband processor and a central processing unit. The baseband processor is primarily used to process communication protocols and communication data, while the central processing unit is primarily used to control the entire terminal device, execute software programs, and process software program data. Processor 1111 in Figure 11 may integrate the functions of both a baseband processor and a central processing unit. Those skilled in the art will appreciate that the baseband processor and the central processing unit may also be independent processors interconnected via a bus or other technology. Those skilled in the art will appreciate that a terminal device may include multiple baseband processors to accommodate different network standards, multiple central processing units to enhance its processing capabilities, and various components of the terminal device may be connected via various buses. The baseband processor may also be referred to as a baseband processing circuit or a baseband processing chip. The central processing unit may also be referred to as a central processing circuit or a central processing chip. The functionality for processing communication protocols and communication data may be built into the processor or stored in memory as a software program, which is executed by the processor to implement the baseband processing functionality.

[0404] The memory is primarily used to store software programs and data. Memory 1112 can exist independently and be connected to processor 1111. Alternatively, memory 1112 can be integrated with processor 1111, for example, within a single chip. Memory 1112 can store program code for executing the technical solutions of the embodiments of the present application, and execution is controlled by processor 1111. The various computer program codes executed can also be considered drivers for processor 1111.

[0405] Figure 11 shows only one memory and one processor. In an actual terminal device, there may be multiple processors and multiple memories. The memory may also be referred to as a storage medium or a storage device. The memory may be a storage element on the same chip as the processor, i.e., an on-chip storage element, or an independent storage element, which is not limited in the present embodiment.

[0406] The transceiver 1113 can be used to support the reception or transmission of radio frequency signals between the communication device and the terminal. The transceiver 1113 can be connected to the antenna 1115. The transceiver 1113 includes a transmitter Tx and a receiver Rx. Specifically, one or more antennas 1115 can receive radio frequency signals. The receiver Rx of the transceiver 1113 is used to receive the radio frequency signal from the antenna, convert the radio frequency signal into a digital baseband signal or a digital intermediate frequency signal, and provide the digital baseband signal or digital intermediate frequency signal to the processor 1111 so that the processor 1111 can further process the digital baseband signal or digital intermediate frequency signal, such as demodulation and decoding. In addition, the transmitter Tx in the transceiver 1113 is also used to receive a modulated digital baseband signal or digital intermediate frequency signal from the processor 1111, convert the modulated digital baseband signal or digital intermediate frequency signal into a radio frequency signal, and transmit the radio frequency signal through one or more antennas 1115. Specifically, the receiver Rx can selectively perform one or more stages of down-mixing and analog-to-digital conversion on the RF signal to obtain a digital baseband signal or a digital intermediate frequency signal. The order of the down-mixing and analog-to-digital conversion processes is adjustable. The transmitter Tx can selectively perform one or more stages of up-mixing and digital-to-analog conversion on the modulated digital baseband signal or digital intermediate frequency signal to obtain a RF signal. The order of the up-mixing and digital-to-analog conversion processes is adjustable. The digital baseband signal and the digital intermediate frequency signal may be collectively referred to as digital signals.

[0407] The transceiver 1113 may also be referred to as an interface unit, a transceiver unit, a transceiver, a transceiver device, an interface module, etc. Optionally, a device in the interface unit that implements a receiving function may be referred to as a receiving unit, and a device in the interface unit that implements a transmitting function may be referred to as a transmitting unit. That is, the interface unit includes a receiving unit and a transmitting unit. The receiving unit may also be referred to as a receiver, an input port, a receiving circuit, etc., and the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0408] It should be noted that the communication device shown in Figure 11 can be specifically used to implement the steps implemented by the network device in the aforementioned method embodiment, and to achieve the corresponding technical effects of the network device. The specific implementation methods of the communication device shown in Figure 11 can refer to the descriptions in the aforementioned various method embodiments, and will not be repeated here one by one.

[0409] An embodiment of the present application also provides a computer-readable storage medium, which is used to store one or more computer-executable instructions. When the computer-executable instructions are executed by a computer, the processor executes the method described in the possible implementation method of any communication device (for example, the first communication device, the second communication device, or the third communication device) in the aforementioned method embodiment.

[0410] An embodiment of the present application also provides a computer program product (or computer program), including instructions. When the instructions in the computer program product are executed by a processor, the processor executes the method of any possible implementation method of any communication device (for example, the first communication device, the second communication device, or the third communication device) in the above method embodiment.

[0411] An embodiment of the present application also provides a chip system, which includes at least one processor for implementing the functions involved in the possible implementation methods of any communication device (such as the first communication device, the second communication device or the third communication device) in the above method embodiment.

[0412] Optionally, the chip system further includes an interface circuit that provides program instructions and / or data to the at least one processor. In one possible design, the chip system may further include a memory for storing program instructions and data necessary for the terminal device. The chip system may be composed of a chip alone or may include a chip and other discrete components.

[0413] In one possible design, the chip system may further include a memory for storing the necessary program instructions and data of any communication device in the above method embodiment. The chip system may be composed of a chip or may include a chip and other discrete devices.

[0414] An embodiment of the present application further provides a communication system, wherein the network system architecture includes the first communication device in any of the above embodiments.

[0415] Alternatively, the communication system includes a first communication device and a second communication device. Alternatively, the communication system includes a first communication device and a third communication device. Alternatively, the communication system includes a first communication device, a second communication device, and a third communication device.

[0416] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are schematic. For example, the division of the units is a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0417] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0418] In addition, the functional units in the various embodiments of the present application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit. If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the part that essentially contributes to the technical solution of the present application or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the various embodiments of the present application. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0419] The above description is merely a specific implementation of the embodiments of the present application, but the scope of protection of the embodiments of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the embodiments of the present application should be included in the scope of protection of the embodiments of the present application. Therefore, the scope of protection of the embodiments of the present application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: include: Sending a first signal, wherein the first signal is used for synchronization; A second signal is received, where the second signal is an echo signal of the first signal, and the second signal is used for sensing.

2. The method according to claim 1, characterized in that The receiving of the second signal comprises: The second signal is received within a first time period.

3. The method according to claim 2, characterized in that The method further comprises: First configuration information is received, where the first configuration information is used to configure the first time period.

4. The method according to claim 2 or 3, characterized in that: The time domain position of the time domain resource carrying the first signal is located before the first time period; the time domain position of the time domain resource carrying the first signal is adjacent to the first time period.

5. The method according to claim 4, characterized in that The first time period includes time resources for a guard interval GP.

6. The method according to claim 2 or 3, characterized in that: The time domain position of the time domain resource carrying the first signal is located before the first time period; the time domain position of the time domain resource carrying the first signal is not adjacent to the first time period.

7. The method according to claim 6, characterized in that The time interval between the time domain position of the time domain resource carrying the first signal and the first time period is GP.

8. The method according to any one of claims 4 to 7, characterized in that: The first signal includes a secondary synchronization signal SSS in a signal block; The signal block is carried in N time units, the first signal is carried in the last time unit of the N time units, and N is an integer greater than or equal to 1.

9. The method according to claim 8, characterized in that The signal block also includes a PSS, and the PSS is carried in the first time unit of the N time units.

10. The method according to claim 8 or 9, characterized in that: The signal block also includes a PBCH, and the PBCH is carried in the remaining N-1 time units except the first time unit among the N time units.

11. The method according to claim 8, characterized in that The first signal also includes the PSS in the signal block, and the PSS is carried in the last time unit of the N time units.

12. The method according to claim 11, characterized in that The signal block also includes a PBCH, and the PBCH is carried in the N time units.

13. The method according to any one of claims 4 to 7, characterized in that: The first signal includes a PSS in a signal block, the signal block includes N time units, the first signal is carried in a first time unit of the N time units, and N is an integer greater than 1; The first time period is located between the first time unit and other N-1 time units in the N units.

14. The method according to claim 13, characterized in that The other N-1 time units are used to carry the SSS in the signal block; Or, the other N-1 time units are used to carry information in the SSS and PBCH in the signal block.

15. The method according to claim 2 or 3, characterized in that: The first signal includes a PSS and an SSS in a signal block, and the second signal includes an echo signal of the PSS and an echo signal of the SSS; Among them, the time domain position of the time domain resources carrying the PSS is located before the time domain position of the time domain resources used to carry the echo signal of the PSS in the first time period, and the time domain position of the time domain resources carrying the SSS is located before the time domain position of the time domain resources used to carry the echo signal of the SSS in the first time period.

16. The method according to claim 15, characterized in that The time domain position of the time domain resource used to carry the echo signal of the PSS in the first time period is located before the time domain position of the time domain resource carrying the SSS.

17. The method according to claim 15 or 16, characterized in that The signal block also includes PBCH; The time domain resource of the PBCH includes at least one of the following: The time domain resources carrying the PSS, the time domain position of the time domain resources carrying the SSS, one or more time units before the time domain position of the time domain resources carrying the PSS, and one or more time units after the time domain position of the time domain resources carrying the SSS.

18. The method according to any one of claims 7 to 16, characterized in that: The signal block is one of the signal blocks in the signal block set; the method further includes: receiving second configuration information, where the second configuration information is used to configure the signal block set; the second configuration information includes at least one of the following: Information used to determine the time domain resources of the signal block set, information used to determine the frequency domain resources of the signal block set, subcarrier spacing SCS configuration information, cyclic prefix CP configuration information, configuration information of the first time period, transmitting beam information for sending the signal blocks in the signal block set, or receiving beam information for echo signals of part or all of the signals in the signal blocks in the signal block set.

19. The method according to claim 18, characterized in that In the signal block set, the interval between the signal block and an adjacent signal block is greater than 4 symbols.

20. The method according to claim 18 or 19, characterized in that The subcarrier spacing of the signal blocks in the signal block set is 30 kHz, and the starting symbol index X of the signal blocks in the signal block set satisfies: X={2,8,16,22}+28*n,n=0 or 0,1; or, X = {4, 16} + 28*nn = 0, 1 or 0, 1, 2, 3; The subcarrier spacing of the signal blocks in the signal block set is 120 kHz, and the starting symbol index X of the signal blocks in the signal block set satisfies: X={2,8,16,22}+28*n,n=0,1,2,3,5,6,7,8,10,11,12,13,15,16,17,18; The subcarrier spacing of the signal blocks in the signal block set is 240 kHz, and the starting symbol index X of the signal blocks in the signal block set satisfies: X = {8, 16, 32, 40} + 56*n, n = 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18; or, X={x1,x2,x3,x4}+56*n,n=0,1,2,3,5,6,7,8,10,11,12,13,15,16,17,18;or, X = {6, 12, 18, 24, 32, 38, 44, 50} + 56*n, n = 0, 1, 2, 3, 5, 6, 7, 8; or, {2,8,16,22,30,36,44,50}+56*n,n=0,1,2,3,5,6,7,8; Among them, x1, x2, x3, x4 are 4 numbers selected from the set {8, 12, 16, 20, 32, 36, 40, 44} from small to large.

21. The method according to any one of claims 1 to 20, characterized in that The method further comprises: Receive third configuration information, where the third configuration information includes at least one of the following: The configuration information of the subcarrier spacing SCS of the first signal, the configuration information of the time domain resources carrying the first signal, the configuration information of the CP length, the configuration information of the GP length, and the configuration information of the time domain resources carrying the first signal and the second signal are used to configure the configuration information of the first time period.

22. A communication method, characterized in that: include: Determine first configuration information, where the first configuration information is used to configure a first time period; wherein the first time period is used to receive a second signal, where the second signal is an echo signal of the first signal, where the first signal is used for synchronization, and where the second signal is used for sensing; Send the first configuration information.

23. A communication method, characterized in that: include: Determine second configuration information, where the second configuration information is used to configure the signal block set; wherein at least one signal block in the signal block set includes a first signal, the first signal is used for synchronization, an echo signal of the first signal is a second signal, and the second signal is used for sensing; Send the second configuration information.

24. The method according to claim 23, characterized in that The second configuration information includes at least one of the following: Information used to determine the time domain resources of the signal block set, information used to determine the frequency domain resources of the signal block set, subcarrier spacing SCS configuration information, cyclic prefix CP configuration information, configuration information for a first time period for receiving the second signal, transmitting beam information for sending the signal blocks in the signal block set, or receiving beam information for echo signals of part or all of the signals in the signal blocks in the signal block set.

25. A communication method, characterized in that: include: Determine third configuration information, where the third configuration information is used to configure the first signal and / or the second signal; wherein the first signal is used for synchronization, the second signal is used for sensing, and the second signal is an echo signal of the first signal; The third configuration information is sent.

26. The method according to claim 25, characterized in that The third configuration information includes at least one of the following: The configuration information of the subcarrier spacing SCS of the first signal, the configuration information of the time domain resources carrying the first signal, the configuration information of the CP length, the configuration information of the GP length, and the configuration information of the time domain resources carrying the first signal and the second signal are used to configure the configuration information of the first time period.

27. A communication method, characterized in that: include: Receiving a primary synchronization signal PSS in a signal block in a second time period; In the second time period, a secondary synchronization signal SSS and / or a physical broadcast channel PBCH in the signal block is received based on the PSS; wherein the echo signals of the PSS and / or the SSS are used for perception.

28. The method according to claim 27, characterized in that The receiving, within the second time period, the SSS and / or the PBCH in the signal block based on the PSS comprises: In the second time period, the SSS and / or PBCH in the signal block are blindly detected based on the PSS.

29. The method according to claim 27, characterized in that In the second time period, the time domain position relationship between the PSS and the SSS is determined by first information, and / or the time domain position relationship between the PSS and the SSS is determined by second information.

30. The method according to claim 29, characterized in that The PSS includes the first information and / or the second information.

31. The method according to any one of claims 27 to 30, characterized in that A signal block in the signal block that is included in the signal block set; The subcarrier spacing of the signal blocks in the signal block set is 30 kHz, and the starting symbol index X of the signal blocks in the signal block set satisfies: X={2,8,16,22}+28*n,n=0 or 0,1; or, X = {4, 16} + 28*nn = 0, 1 or 0, 1, 2, 3; The subcarrier spacing of the signal blocks in the signal block set is 120 kHz, and the starting symbol index X of the signal blocks in the signal block set satisfies: X={2,8,16,22}+28*n,n=0,1,2,3,5,6,7,8,10,11,12,13,15,16,17,18; The subcarrier spacing of the signal blocks in the signal block set is 240 kHz, and the starting symbol index X of the signal blocks in the signal block set satisfies: X = {8, 16, 32, 40} + 56*n, n = 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18; or, X={x1,x2,x3,x4}+56*n,n=0,1,2,3,5,6,7,8,10,11,12,13,15,16,17,18;or, X = {6, 12, 18, 24, 32, 38, 44, 50} + 56*n, n = 0, 1, 2, 3, 5, 6, 7, 8; or, {2,8,16,22,30,36,44,50}+56*n,n=0,1,2,3,5,6,7,8; Among them, x1, x2, x3, x4 are 4 numbers selected from the set {8, 12, 16, 20, 32, 36, 40, 44} from small to large.

32. A communication device, characterized in that: Comprising means for performing the method as claimed in any one of claims 1 to 31.

33. A communication device, characterized in that: The method comprises at least one processor coupled to a memory; the at least one processor is configured to execute the method according to any one of claims 1 to 31.

34. The communication device according to claim 33, characterized in that The communication device is a chip or a chip system.

35. A readable storage medium, characterized in that: The storage medium stores a computer program or instruction, and when the computer program or instruction is executed by the communication device, the method according to any one of claims 1 to 31 is implemented.

36. A computer program product, characterized in that The method comprises instructions which, when executed on a computer, cause the computer to perform the method according to any one of claims 1 to 31.

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