Communication method and related equipment

Abstract

A communication method and related equipment are used for enabling a first signal sent by a first communication device not only to be used for synchronization of other communication equipment, but also to be used for perception of the first communication equipment, and can improve the resource utilization rate while reducing the perception implementation complexity so as to improve the communication efficiency. In the method, after a first communication device transmits a first signal for synchronization, the first communication device may receive a second signal for perception, and the second signal is an echo signal of the first signal. Wherein after the first communication device sends the first signal, the first signal forms an echo signal after collision (such as at least one of reflection, diffraction or scattering) of various obstacles in the physical space, so that the first communication device can realize perception based on the echo signal of the first signal.

Description

Technical Field

[0001] This application relates to the field of communications, and in particular, to a communication method and related devices. Background Art

[0002] Wireless communication can be a transmission communication between two or more communication nodes without propagation through conductors or cables. The communication nodes generally include network devices and / or terminal devices.

[0003] Currently, in a communication system, after a sending end sends a signal, a receiving end can send feedback information based on the signal, so that the sending end can perceive the receiving end based on the feedback information. In other words, in the case where there are multiple communication devices in the physical space, after a communication device sends a signal, it can perceive other communication devices based on the information fed back by other communication devices.

[0004] However, in the above implementation process, the signal sending end depends on the feedback of the signal receiving end to achieve perception. This implementation method is relatively cumbersome and has a high complexity. Summary of the Invention

[0005] This application provides a communication method and related devices, which are used to enable a first signal sent by a first communication device to be used for synchronization of other communication devices and also for perception of the first communication device, which can reduce the complexity of perception implementation and also improve resource utilization rate to improve communication efficiency.

[0006] In a first aspect of this application, a communication method is provided. In this method, a first signal is sent, and the first signal is used for synchronization; a second signal is received, and the second signal is an echo signal of the first signal and is used for perception.

[0007] This method is applicable to a first communication device. The first communication device can be a communication device (such as a terminal device or an access network device), or the first communication device can be a part of the components in the communication device (such as a processor, a chip, or a chip system, etc.), or the first communication device can also be a logical module or software that can implement all or part of the communication device functions, or the first communication device can be a communication perception fusion device (such as a terminal communication perception fusion device or an access network communication perception fusion device).

[0008] 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 sensing, 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 (such as at least one of reflection, diffraction, or scattering), enabling the first communication device to achieve sensing based on the echo signal of the first signal. Thus, compared with the implementation method where the signal sender depends on the feedback from the signal receiver to achieve sensing, the first communication device achieves sensing through the echo signal of the first signal it sends, which can reduce the implementation complexity.

[0009] 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, these 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, it enables the first communication device to achieve sensing based on the echo signal of the first signal, and enables other communication devices to obtain synchronization information based on the first signal. Thus, the first signal sent by the first communication device can be used for both the synchronization of other communication devices and the sensing of the first communication device, which can improve resource utilization and communication efficiency.

[0010] In addition, compared with achieving sensing through signals with a 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, thus achieving better sensing performance with a smaller signal bandwidth.

[0011] It should be understood that the echo signal of a signal (such as the echo signal of the first signal) can be understood as the signal sent by the sending device, which forms a signal that reaches the sending device after colliding with various obstacles in the physical space (such as at least one of reflection, diffraction, or scattering). Correspondingly, the use of the echo signal for sensing can be understood as the echo signal being used for sensing (or for reflecting) one or more of the obstacle information of the signal in the physical space, the transmission channel information formed by the collision with the obstacle, or the transmission path information.

[0012] Optionally, the echo signal can be replaced with other terms, such as reflection signal, sensing feedback signal, sensing response signal, detection response signal, radar signal, etc.

[0013] Optionally, the echo signal is used for sensing (for example, the second signal is an echo signal of the first signal and is used for sensing). It can be understood that the echo signal is used for one or more of self-sensing, positioning, measurement, detection, channel sensing, monitoring, tracking, time measurement, distance measurement, angle measurement, speed measurement, Doppler shift measurement, point cloud measurement, or sensing feedback.

[0014] Optionally, the sensing result obtained from the echo signal used for sensing can be applied to multiple services, such as one or more of environmental sensing, target recognition, target positioning and tracking, or target imaging. Among them, environmental sensing can include sensing one or more of geographical location, distance, speed, angle, map, attitude, scale, imaging, or material.

[0015] Optionally, the transmission beam of the first signal and the reception beam of the second signal can be the same beam (or adjacent beams). In this way, the reception success rate of the second signal can be improved.

[0016] In a possible implementation manner of the first aspect, the first communication device receives the second signal, including: the first communication device receives the second signal within a first time period.

[0017] Based on the above technical solution, during the process of the first communication device receiving the second signal, the first communication device can receive the second signal by performing signal detection within the 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 the configured or pre-configured first time period, and can avoid the unnecessary overhead caused by the first communication device continuously detecting for a long time when it does not receive the second signal (for example, when the transmission loss of the first signal on the transmission path is large, or the distance of the obstacle that collides with the first signal is far, resulting in a small energy of the echo signal, the first communication device may not successfully detect the second signal). Configuring the first time period can 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.

[0018] Optionally, when the above technical solution is applied to a half-duplex scenario or mode, the first communication device may not be able to perform signal reception and transmission on the same time unit. For this reason, during the process of the first communication device receiving the second signal within the first time period, the first communication device does not perform signal transmission. In other words, the first time period is not used for signal transmission. Or it can be said that in the half-duplex mode, the first communication device cannot receive when transmitting and cannot transmit when receiving.

[0019] Optionally, when the above technical solution is applied to a full-duplex scenario or mode, the first communication device can receive and transmit signals on the same time unit. For this purpose, during the process of the first communication device receiving the second signal in the first time period, the first communication device can perform signal transmission. In the full-duplex mode, the first communication device can send and receive signals on the same frequency, or can send and receive signals at different frequencies, such as different frequencies within the same frequency band or frequencies in different frequency bands to send and receive signals simultaneously. Generally, to avoid co-frequency interference, during the first time period, the first communication device can receive the second signal on a certain frequency band and perform the transmission and / or reception of other signals on other frequency bands outside this frequency band.

[0020] In a possible implementation manner of the first aspect, the method further includes: the first communication device receives first configuration information, and the first configuration information is used to configure the first time period.

[0021] Based on the above technical solution, the first communication device can also receive the first configuration information for configuring the first time period (that is, the first configuration information includes the configuration information for configuring the first time period), so that the first communication device performs the 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), so as to improve the reception success rate of the second signal received by the first communication device.

[0022] Optionally, the first time period is pre-configured. In this way, the configuration overhead can be saved.

[0023] In a possible implementation manner of the first aspect, the time domain position of the time domain resource carrying the first signal is 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.

[0024] Based on the above technical solution, the first communication device can perform the reception of the second signal in the first time period adjacent to the time domain resource carrying the first signal after sending the first signal, so that the solution can be applied to a half-duplex scenario, that is, the first communication device performs the reception of the second signal after sending the first signal.

[0025] 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 length of the transmission delay of the echo signal is positively correlated with the length or distance of the sensing distance, for this reason, through the implementation manner in which the first communication device can receive the second signal within a short time after sending the first signal, the solution can be applied to scenarios with a short sensing (or detection) distance.

[0026] Optionally, the above technical solution is applied to a full-duplex scenario or mode. The first communication device can receive a 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 before the first time period, or the time domain position of the time domain resource carrying the first signal can partially or completely overlap with the first time period, which is not limited here. The start and end times of the first time period depend on the distance requirement of sensing detection. Since in the full-duplex mode, the first time period can overlap with the transmission time of the first signal, the solution can be applied to scenarios with a shorter sensing (or detection) distance.

[0027] It should be understood that the resource position of one resource being before or after the resource position of another resource can be a relationship of before and after 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 this 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 this one resource is greater than the resource index of the other resource.

[0028] In a possible implementation manner of the first aspect, the first time period includes time resources for a guard period (GP).

[0029] Based on the above technical solution, for receiving the time resources that may include GP within the first time period, in this way, the solution can be applied to a half-duplex scenario, and the first communication device can perform transceiver conversion within the time interval of GP to improve the reception success rate of the first communication device for receiving the second signal.

[0030] Optionally, in the case where the first time period includes time resources of GP, the time resources of GP can be one or more consecutive time units in the time domain, and the time domain start position of the one or more time units is the same as the time domain start position of the first time period. In this way, the resource utilization rate can be improved.

[0031] In a possible implementation manner of the first aspect, the time domain position of the time domain resource carrying the first signal is 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.

[0032] Based on the above technical solution, the first communication device can perform reception of the second signal on the first time period that is not adjacent to the time domain resource carrying the first signal after sending 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.

[0033] 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 after a certain time after sending the first signal. Since the length of the transmission delay of the echo signal is positively correlated with the length or distance of the sensing distance, for this reason, the implementation method that enables the first communication device to receive the second signal within a relatively long time after sending the first signal can enable the solution to be applied to scenarios with a relatively long sensing (or detection) distance.

[0034] In a possible implementation manner of the first aspect, the time interval between the time domain position of the time domain resource carrying the first signal and the first time period is GP.

[0035] 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 transceiver conversion within the time interval of GP to improve the reception success rate of the first communication device for receiving the second signal.

[0036] In a possible implementation manner of the first aspect, the first signal includes a secondary synchronization signal (SSS) in a signal block; wherein, the signal block is carried on N time units, and the first signal is carried on the last time unit of the N time units, and N is an integer greater than or equal to 1.

[0037] Optionally, in the N time periods (or the M time units mentioned later), each time unit can be one or more symbols, one or more mini-slots, one or more time slots, one or more sub-frames, one or more frames, etc.

[0038] Based on the above technical solution, the first signal can include SSS, enabling the receiver of the first signal (such as the third communication device described later) to obtain the synchronization information carried by the SSS based on the SSS. And the first signal can be carried on the last time unit of the N time units. In this way, the first communication device can subsequently receive the second signal through the first time period after the N time units.

[0039] 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 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 block (SEB), or other names.

[0040] Optionally, the secondary synchronization signal (SSS) involved in this application can be used to carry secondary synchronization information for at least one of time-domain synchronization or frequency-domain synchronization in the synchronization process. Exemplarily, the cell identifier or synchronization identifier is obtained by combining the SSS with the PSS. The SSS is usually composed of a specific sequence that occupies a certain time-frequency resource and has a certain length. The SSS sequence is usually composed of sequences with good autocorrelation and cross-correlation characteristics, such as the gold sequence, etc., for easy detection. Usually, the bandwidth corresponding to the SSS is a relatively small bandwidth, such as 127 resource elements, so that various terminal devices in the system have the ability to detect this bandwidth.

[0041] 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 among the N time units.

[0042] Based on the above technical solution, the signal block sent by the first communication device may further include the 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 among the N time units. In this way, in addition to enabling the receiver of the signal block to obtain the synchronization information carried by the PSS based on the PSS, it can also enable the receiver of the signal block to resolve other information (such as SSS and / or PBCH) of the signal block based on the synchronization information carried by the PSS, so as to improve the reception success rate of the other information.

[0043] Optionally, the PSS involved in this application, that is, the primary synchronization signal, can be used to carry primary synchronization information for time-domain synchronization and frequency-domain synchronization in the synchronization process. Exemplarily, the PSS carries partial information of the cell identifier (ID), and the cell identifier or synchronization identifier can be obtained by combining with the SSS. The PSS is usually the first signal for the terminal device to enter the system for initial detection, and is usually composed of a specific sequence that occupies a certain time-frequency resource and has a certain length. The SSS sequence is usually composed of sequences with good autocorrelation and cross-correlation characteristics, such as M sequences, etc., for easy detection. Usually, the bandwidth corresponding to the PSS is a relatively small bandwidth, such as 127 resource elements, so that various terminal devices in the system have the ability to detect this bandwidth.

[0044] In a possible implementation manner of the first aspect, the signal block further includes a physical broadcast channel (PBCH) (or partial 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.

[0045] 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 (such as the third communication device described later) can obtain the 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, which can use as many time units as possible to carry the PBCH to carry more information.

[0046] 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, paging), the subcarrier offset of the SSB, the demodulation pilot position, the control channel configuration for scheduling system information, the cell access prohibition information, the SSB index, or the half-frame indication.

[0047] In a possible implementation manner of the first aspect, the first signal further includes the PSS in the signal block, and the PSS is carried in the last time unit of the N time units.

[0048] Based on the above technical solution, the first signal sent by the first communication device may further 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 sensing performance.

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

[0050] Based on the above technical solution, 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.

[0051] In a possible implementation of the first aspect, the first signal includes the PSS in the signal block, the signal block includes N time units, the first signal is carried in the first time unit of the N time units, and N is an integer greater than 1; the first time period is between the first time unit of the N units and the other N - 1 time units.

[0052] Based on the above technical solution, the first signal may include the 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. And the first signal may be carried in the first time unit of the N time units. And the first time period is between the first time unit of the N units and the other N - 1 time units. In this way, the subsequent first communication device can receive the second signal through the first time period after the first time unit.

[0053] In a possible implementation 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 information of the SSS and PBCH in the signal block.

[0054] Based on the above technical solution, in addition to including the PSS, the signal block sent by the first communication device may further include the SSS (or the SSS and PBCH). In this way, the receiver of the signal block can obtain more synchronization information (or synchronization information and system information) through the SSS (or the SSS and PBCH).

[0055] In a possible implementation of the first aspect, the first signal and the second signal are carried in M time units, and M is an integer greater than or equal to 1; where N of the M time units are used to carry the signal block, 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.

[0056] 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 on M time units, that is, the first communication device can complete the transmission and sensing of the synchronization signal within the M time units. In addition, N of 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.

[0057] In a possible implementation manner of the first aspect, the N time units are consecutive time units in the time domain; among the M time units, the other M - N time units after the N time units are used to carry the second signal (that is, the other M - N time units are the first time period for receiving the second signal); or, among the M time units, the other M - N time units after the N time units are used to carry the GP and the second signal (that is, some of the other M - N 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 the M - N - P time units after the P time units are used to carry the second signal (that is, the M - N - P time units are the first time period for receiving the second signal), where P is a positive integer.

[0058] Based on the above technical solution, in the case where the N time units are consecutive time units in the time domain, the M time units can be implemented in the above multiple ways to improve the flexibility of the scheme implementation.

[0059] In a possible implementation manner of the first aspect, the first signal includes the SSS, and the SSS is carried on the last time unit of the N time units.

[0060] Based on the above technical solution, the first signal can include the SSS, so that the receiver of the first signal (such as the third communication device described later) can obtain the synchronization information carried by the SSS based on the SSS. And the first signal can be carried on the last time unit of the N time units. In this way, the first communication device can receive the second signal through the first time period after the N time units.

[0061] In a possible implementation manner of the first aspect, the SSS is included in a signal block, and the signal block further includes the PSS; the PSS is carried on the first time unit of the N time units, or the PSS is carried on the last time unit of the N time units.

[0062] Based on the above technical solution, the signal block sent by the first communication device may further include the 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 may be carried in the first time unit among the N time units. In this way, the receiver of the signal block can obtain the synchronization information carried by the PSS based on the PSS, and can also enable the receiver of the signal block to resolve other information (such as SSS and / or PBCH) of the signal block based on the synchronization information carried by the PSS, so as to improve the reception success rate of other information. In addition, the PSS may also be carried in the last time unit among the N time units to improve the flexibility of the scheme implementation.

[0063] In a possible implementation manner of the first aspect, the signal block further includes the PBCH; the PSS in the signal block is carried in the first time unit among the N time units, and the PBCH is carried in the remaining N - 1 time units among the N time units except the first time unit; or, the PSS in the signal block is carried in the last time unit among the N time units, and the PBCH is carried in the N time units.

[0064] Based on the above technical solution, 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 the PBCH, and the PBCH is carried in N - 1 time units or N time units, so as to use as many time units as possible to carry the PBCH to carry more information.

[0065] In a possible implementation manner of the first aspect, the N time units include k time units and N - k time units, the k time units are consecutive time units in the time domain, the N - k time units are consecutive 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 N - k time units and the ending time unit of the M time units are the same time unit, and k is a positive integer; among the M time units, the other M - N time units except the N time units are used to carry the second signal (i.e., the first time period); or, among the M time units, the other M - N time units except 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, among the M time units, P time units adjacent to the k time units are used to carry the GP, and the M - N - P 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.

[0066] Based on the above technical solution, the N time units for carrying signal blocks may include two segments of time units that are continuous in the time domain respectively, and among the M time units, GP can also be carried in the above-mentioned various ways, so that the solution can be applied to a half-duplex scenario. Moreover, the first communication device can perform transceiver conversion within the time interval of GP to improve the reception success rate of the first communication device for receiving the second signal.

[0067] In a possible implementation manner of the first aspect, the first signal includes the PSS in the signal block; the SSS in the signal block is carried on the first time unit of the N-k time units, and the PBCH in the signal block is carried on the N time units.

[0068] Based on the above technical solution, the first signal may further include the PSS in the signal block, and the SSS in the signal block is carried on the first time unit of the N-k time units, and the PBCH in the signal block is carried on the N time units. In this way, the first communication device realizes sensing in two segments of time units that are continuous in the time domain respectively, so as to improve the sensing performance.

[0069] In a possible implementation manner 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 before the time domain position of the time domain resource for carrying 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 before the time domain position of the time domain resource for carrying the echo signal of the SSS in the first time period.

[0070] Based on the above technical solution, the first signal may include the PSS and SSS in the signal block. Correspondingly, as the echo signal of the first signal, 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 sensing in two segments of time units that are continuous in the time domain respectively, so as to improve the sensing performance.

[0071] 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 receive these two echo signals respectively in two segments of time units that are continuous in the time domain.

[0072] In a possible implementation manner of the first aspect, the time domain position of the time domain resource for carrying the echo signal of the PSS in the first time period is before the time domain position of the time domain resource carrying the SSS.

[0073] Based on the above technical solution, the first communication device may 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 described later) can obtain the PSS and then receive the SSS based on the PSS, which can improve the reception success rate of the SSS.

[0074] In a possible implementation manner of the first aspect, the signal block further 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.

[0075] 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 (such as the third communication device described later) can obtain the system information carried by the PBCH based on the PBCH. Moreover, the PBCH can be carried by at least one of the above resources, which can improve the flexibility of the scheme implementation.

[0076] In a possible implementation manner of the first aspect, the signal block is one of the signal blocks in the signal block set; the method further includes receiving second configuration information for configuring the signal block set, where 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, transmission beam information for transmitting the signal blocks in the signal block set, or reception beam information for the echo signals of some or all of the signals in the signal block set.

[0077] Based on the above technical solution, the first communication device may send signal blocks based on the second configuration information, where some or all of the signal blocks in the signal block set may carry the first signal. In this way, multiple detections can be achieved through the transmission of multiple signal blocks to improve the detection performance.

[0078] In addition, different signal blocks in the signal block set may be sent through different communication beams. Therefore, the detections of different signal blocks sent by the first communication device based on different communication beams can achieve detections in different beam directions to improve high-precision detection.

[0079] In this application, the signal block set can be replaced by other terms, for example, signal block burst, signal block burst set, etc.

[0080] In a possible implementation of the first aspect, in the signal block set, the interval between the signal block and the adjacent signal block is greater than 4 symbols.

[0081] 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 4-symbol interval between traditional different SSBs, the configuration of the first time period can be realized through a larger time interval, so as to realize sensing through the second signal received in the first time period, reduce the interference in the sensing process, and can realize sensing in a half-duplex scenario or mode.

[0082] In a possible implementation of the first aspect, the subcarrier spacing of the signal blocks in the signal block set is 30 kilohertz (kHz), and the starting symbol index X of the signal blocks in the signal block set satisfies:

[0083] X = {2, 8, 16, 22} + 28 * n, n = 0 or 0, 1; or,

[0084] X = {4, 16} + 28 * n, n = 0, 1 or 0, 1, 2, 3;

[0085] 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:

[0086] X = {2, 8, 16, 22} + 28 * n, n = 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18;

[0087] 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:

[0088] 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,

[0089] 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,

[0090] X = {6, 12, 18, 24, 32, 38, 44, 50} + 56 * n, n = 0, 1, 2, 3, 5, 6, 7, 8; or,

[0091] {2, 8, 16, 22, 30, 36, 44, 50} + 56*n, n = 0, 1, 2, 3, 5, 6, 7, 8;

[0092] Where x1, x2, x3, x4 are 4 numbers selected at intervals from the set {8, 12, 16, 20, 32, 36, 40, 44} in ascending order.

[0093] Based on the above technical solution, in the signal block set, the start symbol indexes of different signal blocks satisfy one or more of the above. In this way, the configuration of the first time period can be achieved with a larger time interval, so as to perform sensing by using the second signal received in the first time period, reduce the interference in the sensing process, and can achieve sensing in a half-duplex scenario or mode.

[0094] In a possible implementation manner of the first aspect, the method further includes: the first communication device receives third configuration information, and 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 resource carrying the first signal, configuration information of the CP length, configuration information of the GP length, configuration information of the time-domain resource carrying the first signal and the second signal, and configuration information for configuring the first time period.

[0095] Based on the above technical solution, the first communication device can also receive the third configuration information and perform the transmission of the first signal and the reception of the second signal based on the third configuration information to implement the above sensing process.

[0096] Optionally, the third configuration information and at least two of the previous first configuration information and the configuration information of the signal block set may be carried in the same configuration message or in different configuration messages, which is not limited here. It should be understood that in the case where the at least two configuration information are carried in the same configuration message, the same configuration information may be carried once. For example, in the case where 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 the configuration information for configuring the first time period. Correspondingly, the same configuration message may carry one copy of the configuration information for the first time period.

[0097] A second aspect of the present application provides a communication method. In this method, 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 sensing; the first configuration information is sent.

[0098] This 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; or 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 some components in the communication device (such as a processor, a chip, or a chip system, etc.), or the second communication device may also be a logic module or software that can implement all or part of the functions of the communication device.

[0099] Based on the above technical solution, the second communication device may send first configuration information for configuring a first time period. Wherein, the first time period is used to receive a second signal, the second signal is an echo signal of a first signal, the first signal is used for synchronization, and the second signal is used for sensing. In other words, after the recipient of the first configuration information (such as the first communication device) receives the first configuration information, 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 receive the echo signal of the first signal based on the first configuration information to achieve sensing. Thus, compared with the implementation method in which the signal sender depends on the feedback of the signal receiver to achieve sensing, by sending the first configuration information, the first communication device can achieve sensing through the echo signal of the first signal it sends, which can reduce the implementation complexity.

[0100] 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, these 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 sensing based on the echo signal of the first signal, and other communication devices can obtain synchronization information based on the first signal. Thus, the first signal sent by the first communication device can be used for both the synchronization of other communication devices and the sensing of the first communication device, which can improve the resource utilization rate to improve the communication efficiency.

[0101] A third aspect of this application provides a communication method. In this method, 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 sensing; the second configuration information is sent.

[0102] This method is applicable to a second communication device, which may be a communication equipment (for example, when the first communication device is a terminal device, the communication equipment may be an access network device or a core network device; or when the first communication device is an access network device, the communication equipment may be a core network device), or the second communication device may be some components in the communication equipment (such as a processor, a chip, or a chip system, etc.), or the second communication device may also be a logic module or software that can implement all or part of the functions of the communication equipment.

[0103] Based on the above technical solution, the second configuration information sent by the second communication device is used to configure the signal block set. Among them, 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 sensing. In other words, after the receiving party of the second configuration information (such as the first communication device) receives the second configuration information, after the first communication device sends a signal block containing the first signal based on the second configuration information, 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 sensing. Thus, compared with the implementation method in which the signal sending end depends on the feedback of the signal receiving end to achieve sensing, by sending the second configuration information, the first communication device can achieve sensing through the echo signal of the first signal it sends, which can reduce the implementation complexity.

[0104] 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, these 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 sensing based on the echo signal of the first signal, and other communication devices can obtain synchronization information based on the first signal. Thus, the first signal sent by the first communication device can be used for both the synchronization of other communication devices and the sensing of the first communication device, which can improve the resource utilization rate to improve the communication efficiency.

[0105] In addition, the first communication device may send signal blocks based on the second configuration information. Among them, some or all of the signal blocks in the signal block set may carry the first signal. In this way, multiple sensing can be achieved through the transmission of multiple signal blocks to improve the sensing performance.

[0106] In addition, different signal blocks in the signal block set may be sent through different communication beams. For this reason, the first communication device can achieve sensing in different beam directions based on the sensing of different signal blocks sent through different communication beams to improve the high-precision sensing.

[0107] 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 a first time period for receiving the second signal, transmission beam information for transmitting the signal blocks in the signal block set, or reception beam information for the echo signals of some or all of the signals in the signal blocks in the signal block set.

[0108] A fourth aspect of this application provides a communication method. In this method, 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 sensing, and the second signal is an echo signal of the first signal; and the third configuration information is transmitted.

[0109] This method is applicable to a second communication device. The second communication device 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; or 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 some components in a communication device (such as a processor, a chip, or a chip system, etc.), or the second communication device may also be a logic module or software that can implement all or part of the functions of a communication device.

[0110] Based on the above technical solution, the third configuration information transmitted 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 sensing, and the second signal is an echo signal of the first signal. In other words, after the receiving party of the third configuration information (such as the first communication device) receives the third configuration information, after the first communication device transmits 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 sensing. Thus, compared with the implementation method in which the signal sender depends on the feedback of the signal receiver to achieve sensing, by transmitting the third configuration information, the first communication device can achieve sensing through the echo signal of the first signal it transmits, which can reduce the implementation complexity.

[0111] 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, they 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 realize sensing based on the echo signal of the first signal, and other communication devices can obtain synchronization information based on the first signal. Thus, the first signal sent by the first communication device can be used for both the synchronization of other communication devices and the sensing of the first communication device, which can improve the resource utilization rate and communication efficiency.

[0112] 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 resource carrying the first signal, configuration information of the CP length, configuration information of the GP length, configuration information of the time-domain resource carrying the first signal and the second signal, and configuration information for configuring the first time period.

[0113] A fifth aspect of the present application provides a communication method. In this method, the PSS in the signal block is received in the second time period, and the first signal is used for synchronization; within 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 sensing.

[0114] This method is applicable to a third communication device. The third communication device can be a communication device (for example, when the first communication device is a terminal device, the communication device can be a terminal device; or when the first communication device is an access network device, the communication device can be a terminal device), or the third communication device can be some components in the communication device (such as a processor, a chip, or a chip system, etc.), or the third communication device can also be a logical module or software that can implement all or part of the communication device functions.

[0115] 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 realize sensing. 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 realize sensing based on the echo signal of the first signal. Thus, compared with the implementation method in which the signal sending end depends on the feedback of the signal receiving end to realize sensing, the first communication device realizes sensing through the echo signal of the first signal it sends, which can reduce the implementation complexity.

[0116] 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, these 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 realize sensing based on the echo signal of the first signal, and other communication devices can obtain synchronization information based on the first signal. Thus, the first signal sent by the first communication device can be used both for the synchronization of other communication devices and for the sensing of the first communication device, which can improve the resource utilization rate to improve the communication efficiency.

[0117] It should be noted that one or more of PSS, SSS, or PBCH in the signal block can refer to the description of the first aspect and its related implementation manners.

[0118] Optionally, the third communication device can receive one or more of the first configuration information, the second configuration information, or the third configuration information, and receive the information in the signal block based on the one or more pieces of configuration information. Among them, the implementation of these configuration information can refer to the description of the first aspect and its related implementation manners.

[0119] In a possible implementation manner 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.

[0120] Based on the above technical solution, within the second time period, after the third communication device receives the PSS in the signal block, since there are various positional relationships between the SSS and / or PBCH in the signal block, for this reason, the third communication device can blindly detect 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.

[0121] In a possible implementation manner of the fifth aspect, within the second time period, the time-domain positional relationship between the PSS and the SSS is determined by the first information, and / or the time-domain positional relationship between the PSS and the SSS is determined by the second information.

[0122] 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 to improve the reception success rate of the third communication device for receiving the SSS and / or PBCH.

[0123] In a possible implementation manner of the fifth aspect, the PSS includes the first information and / or the second information.

[0124] Based on the above technical solution, the third communication device can obtain the first information and / or the second information through the PSS, and then further receive the SSS and / or PBCH based on the time domain position relationship determined by the first information and / or the second information.

[0125] 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.

[0126] In a possible implementation manner of the fifth aspect, the first signal is included in a signal block in a signal block set;

[0127] 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:

[0128] X = {2, 8, 16, 22} + 28 * n, n = 0 or 0, 1; or,

[0129] X = {4, 16} + 28 * n, n = 0, 1 or 0, 1, 2, 3;

[0130] 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:

[0131] X = {2, 8, 16, 22} + 28 * n, n = 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18;

[0132] 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:

[0133] 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,

[0134] 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,

[0135] X = {6, 12, 18, 24, 32, 38, 44, 50} + 56 * n, n = 0, 1, 2, 3, 5, 6, 7, 8; or,

[0136] {2, 8, 16, 22, 30, 36, 44, 50} + 56 * n, n = 0, 1, 2, 3, 5, 6, 7, 8;

[0137] Among them, x1, x2, x3, and x4 are four numbers selected at intervals from the set {8, 12, 16, 20, 32, 36, 40, 44} in ascending order.

[0138] Based on the above technical solution, in the signal block set, the start symbol indices of different signal blocks satisfy one or more of the above. In this way, the configuration of the first time period can be achieved with a larger time interval, so as to realize sensing through the second signal received in the first time period, reduce the interference in the sensing process, and can realize sensing in a half-duplex scenario or mode.

[0139] The sixth aspect of the present application provides a communication device, which is a first communication device. The device includes a transceiver unit and a processing unit; the processing unit is used to determine a first signal, and 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, and the second signal is an echo signal of the first signal, and the second signal is used for sensing.

[0140] 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 manner of the first aspect and achieve the corresponding technical effects. Specifically, reference can be made to the first aspect, and details are not described here again.

[0141] The seventh aspect of the present application provides a communication device, 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, and 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 sensing; the transceiver unit is used to send the first configuration information.

[0142] 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 manner of the second aspect and achieve the corresponding technical effects. Specifically, reference can be made to the second aspect, and details are not described here again.

[0143] The eighth aspect of the present application provides a communication device, which is a second communication device. The device 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, and the echo signal of the first signal is a second signal, and the second signal is used for sensing; the transceiver unit is used to send the second configuration information.

[0144] 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 manner of the third aspect, and achieve the corresponding technical effects. For details, reference can be made to the third aspect, which will not be elaborated here.

[0145] In the ninth aspect of the present application, a communication device is provided. This device is a second communication device and includes a transceiver unit and a processing unit. The processing unit is used to determine third configuration information, which is used to configure the first signal and / or the second signal. Among them, 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 transceiver unit is used to send the third configuration information.

[0146] 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 manner of the fourth aspect, and achieve the corresponding technical effects. For details, reference can be made to the fourth aspect, which will not be elaborated here.

[0147] In the tenth aspect of the present application, a communication device is provided. This device is a third communication device and includes a transceiver unit and a processing unit. The transceiver unit is used to receive the primary synchronization signal PSS in the signal block during a second time period, and the first signal is used for synchronization. The processing unit is used to receive the secondary synchronization signal SSS and / or the physical broadcast channel PBCH in the signal block based on the PSS during the second time period.

[0148] 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 manner of the fifth aspect, and achieve the corresponding technical effects. For details, reference can be made to the fifth aspect, which will not be elaborated here.

[0149] In the eleventh aspect of the present application, a communication device is provided, including at least one processor, and 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 programs or instructions so that the device implements the method described in any one of the possible implementation manners of any one of the foregoing first aspect to the fifth aspect.

[0150] In the twelfth aspect of the present application, a communication device is provided, including at least one logic circuit and an input / output interface. The logic circuit is used to execute the method described in any one of the possible implementation manners of any one of the foregoing first aspect to the fifth aspect.

[0151] In the thirteenth aspect of the present application, a communication system is provided. The communication system includes the foregoing first communication device and the second communication device. Or, the communication system includes the foregoing first communication device and the third communication device. Or, the communication system includes the foregoing first communication device, the second communication device, and the third communication device.

[0152] The fourteenth aspect of the present application provides a computer-readable storage medium for storing one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes the method described in any one of the possible implementation manners of any one of the first to fifth aspects as described above.

[0153] 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 one of the possible implementation manners of any one of the first to fifth aspects as described above.

[0154] The sixteenth aspect of the present application provides a chip system, which includes at least one processor for supporting a communication device to implement the method described in any one of the possible implementation manners of any one of the first to fifth aspects as described above.

[0155] In a possible design, the chip system may further include a memory for storing necessary program instructions and data of the communication device. The chip system may be composed of chips or may include chips and other discrete devices. Optionally, the chip system further includes an interface circuit, and the interface circuit provides program instructions and / or data for the at least one processor.

[0156] Among them, for the technical effects brought by any one of the design manners from the sixth aspect to the sixteenth aspect, reference may be made to the technical effects brought by different design manners from the first aspect to the fifth aspect as described above, and details are not elaborated herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0157] Figures 1a to 1d Some schematic diagrams of the communication system provided by the present application;

[0158] Figure 2 A schematic diagram of the communication method provided by the present application;

[0159] Figure 3 Another schematic diagram of the communication method provided by the present application;

[0160] Figures 4a to 4d Some schematic diagrams of the signal blocks provided by the present application;

[0161] Figures 5a to 5e Some schematic diagrams of the signal blocks provided by the present application;

[0162] Figures 6a to 6n Some schematic diagrams of the signal blocks provided by the present application;

[0163] Figure 7a A schematic diagram of the signal block set provided by the present application;

[0164] Figures 7b to 7e Some schematic diagrams of the communication system provided for this application;

[0165] Figures 8 - 11 Schematic diagram of the communication device provided for this application. Detailed implementation manners

[0166] First, some terms in the embodiments of this application are explained to facilitate the understanding of those skilled in the art.

[0167] (1) Terminal device: It can be a wireless terminal device capable of receiving scheduling and indication information from a network device. The wireless terminal device can be a device that provides voice and / or data connectivity to a user, or a handheld device with a wireless connection function, or other processing devices connected to a wireless modem.

[0168] A terminal device can communicate with one or more core networks or the Internet via a radio access network (RAN). The terminal device can be a mobile terminal device, such as a mobile phone (or a "cellular" phone, mobile phone), a computer, and a data card. For example, it can be a portable, pocket-sized, handheld, computer-integrated, or vehicle-mounted mobile device that exchanges voice and / or data with the radio access network. For example, devices such as personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), tablets (Pads), and computers with wireless transceiver functions. The wireless terminal device can also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station (MS), a remote station, an access point (AP), a remote terminal device, an access terminal device, a user terminal device, a user agent, a subscriber station (SS), a customer premises equipment (CPE), a terminal, a user equipment (UE), a mobile terminal (MT), etc.

[0169] By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. A wearable device may also be referred to as a wearable intelligent device or a smart wearable device, etc. It is a general term for devices developed by applying wearable technology to the intelligent design of daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. A wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable intelligent devices include those with complete functions and large sizes that can realize complete or partial functions without relying on a smart phone, such as smart watches or smart glasses, etc., and those that only focus on a certain type of application function and need to cooperate with other devices such as smart phones, such as various smart bracelets for physical sign monitoring, smart helmets, and smart jewelry.

[0170] The terminal may also be a drone, a robot, a terminal in device-to-device (D2D) communication, a terminal in vehicle to everything (V2X) communication, 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.

[0171] In addition, the terminal device may also be a terminal device in a communication system evolved after the fifth-generation (5G) communication system (such as the sixth-generation (6G) communication system, etc.) or a terminal device in a future evolved public land mobile network (PLMN). Exemplarily, the 6G network can further expand the form and function of 5G communication terminals, and 6G terminals include, but are not limited to, vehicles, cellular network terminals (integrating satellite terminal functions), drones, and internet of things (IoT) devices.

[0172] In the embodiments of the present application, the above terminal device may also obtain AI services provided by a network device. Optionally, the terminal device may also have AI processing capabilities.

[0173] (2) Network device: It can be a device in a wireless network. For example, the network device can be a RAN node (or device) that connects a terminal device to a wireless network, and can also be called a base station. Currently, some examples of RAN devices are: 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. Additionally, in a network structure, the network device can include a centralized unit (CU) node, or a distributed unit (DU) node, or a RAN device including a CU node and a DU node.

[0174] Optionally, the RAN node can also be a macro base station, a micro base station or an indoor station, a relay node or a donor node, or a radio controller in a cloud radio access network (CRAN) scenario. The RAN node can also be a server, a wearable device, a vehicle or an in-vehicle device, etc. For example, the access network device in vehicle to everything (V2X) technology can be a road side unit (RSU).

[0175] In another possible scenario, multiple RAN nodes cooperate to assist a terminal in achieving wireless access, and different RAN nodes respectively implement partial functions of a base station. For example, the RAN nodes can be a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. The CU and the DU can be separately provided, or can also be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as included in a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0176] In different systems, the CU (or CU-CP and CU-UP), the DU, or the RU can also have different names, but those skilled in the art can understand their meanings. For example, in an open RAN (O-RAN or ORAN) system, the CU can also be called an O-CU (open CU), the DU can also be called an O-DU, the CU-CP can also be called an O-CU-CP, the CU-UP can also be called an O-CU-UP, and the RU can also be called an O-RU. For the convenience of description, in this application, the CU, CU-CP, CU-UP, DU, and RU are used as examples for description. Any one of the 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.

[0177] 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: radio resource control (RRC) layer, packet data convergence protocol (PDCP) layer, radio link control (RLC) layer, media access control (MAC) layer, or physical (PHY) layer, etc. The user plane protocol layer may include at least one of the following: service data adaptation protocol (SDAP) layer, PDCP layer, RLC layer, MAC layer, or physical layer, etc.

[0178] For the correspondence between the network elements in the ORAN system and the protocol layer functions they can implement, refer to Table 1 below.

[0179] Table 1

[0180] ORAN network element Protocol layer functions of 3GPP O-CU-CP RRC+PCDP - Control Plane (PDCP-C) O-CU-UP SDAP+PCDP - User Plane (PDCP-U) O-DU RLC+MAC+PHY-high O-RU PHY-low

[0181] The network device may be other devices that provide wireless communication functions for the terminal device. The specific technologies and specific device forms adopted by the network device are not limited in the embodiments of the present application. For ease of description, the embodiments of the present application do not limit.

[0182] The network device may further include a core network device, such as 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 4th generation (4G) network; 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 device may further include other core network devices in a 5G network and the next-generation network of the 5G network.

[0183] In the embodiments of the present application, the above network device may further be 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, a computing power node, a RAN node with AI capabilities, or a core network element with AI capabilities on the network side (access network or core network).

[0184] In the embodiments of the present application, the device for implementing the functions of the network device may be the network device or a device capable of supporting the network device to implement such functions, such as a chip system, and this device may be installed in the network device. In the technical solutions provided in the embodiments of the present application, the case where the device for implementing the functions of the network device is the network device is taken as an example to describe the technical solutions provided in the embodiments of the present application.

[0185] (3) Configuration and pre-configuration: In the present application, both configuration and pre-configuration are used. Among them, configuration means that the network device / server sends the configuration information or the value of some parameters to the terminal through a message or signaling, so that the terminal can determine the communication parameters or the resources during transmission according to these values or information. Pre-configuration is similar to configuration. It can be the parameter information or parameter values pre-negotiated between the network device / server and the terminal device, or the parameter information or parameter values adopted by the base station / network device or the terminal device specified by the standard protocol, or the parameter information or parameter values pre-stored in the base station / server or the terminal device. The present application does not limit this.

[0186] Furthermore, these values and parameters can be changed or updated.

[0187] (4) The terms "system" and "network" in the embodiments of the present application can be used interchangeably. "Plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, or B exists alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after. "At least one (item)" or similar expressions thereof refer to any combination of these items, including any combination of single item (item) or plural items (items). For example, "at least one of A, B, or C" includes A, B, C, AB, AC, BC, or ABC. Also, 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.

[0188] (5) "Sending" and "receiving" in the embodiments of the present application represent 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 directly sending through the air interface or indirectly sending by other units or modules through the air interface. "Receiving information from YY" can be understood as the source of the information being YY, which can include directly receiving from YY through the air interface or indirectly receiving from YY through the air interface by 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.

[0189] In other words, sending and receiving can be carried out between devices, for example, between a network device and a terminal device, or can be carried out within a device, for example, sending or receiving between components, modules, chips, software modules, or hardware modules within a device through a bus, trace, or interface.

[0190] It can be understood that necessary processing such as encoding and modulation may be performed on the information between the source and destination of the information transmission, but the destination can understand the valid information from the source. Similar expressions in the present application can be understood similarly and will not be elaborated further.

[0191] (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. If the information indicated by a certain piece of information (such as the indication information described below) is called the information to be indicated, then in the specific implementation process, there are many ways to indicate the information to be indicated. For example, but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the index of the information to be indicated, etc. It is also possible to indirectly indicate the information to be indicated by indicating other information, where there is an association relationship between the other information and the information to be indicated; it is also possible to only indicate a part of the information to be indicated, while the other parts of the information to be indicated are known or pre-agreed. For example, the arrangement order of each piece of information pre-agreed (such as protocol pre-definition) can be used to implement the indication of specific information, thereby reducing the indication overhead to a certain extent. The present application does not limit the specific manner of indication. It can be understood 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.

[0192] In the present application, unless otherwise specified, the same or similar parts between various embodiments can be referred to each other. In each embodiment of the present application, as well as in each method / design / implementation manner in each embodiment, if there is no special specification and logical conflict, the terms and / or descriptions between different embodiments, as well as between each method / design / implementation manner in each embodiment, are consistent and can be mutually referred to. The technical features in different embodiments, as well as in each method / design / implementation manner in each embodiment, can be combined to form new embodiments, methods, or implementation manners according to their inherent logical relationships. The embodiments of the present application described below do not constitute a limitation on the protection scope of the present application.

[0193] 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.). Among them, the communication system includes at least one network device and / or at least one terminal device.

[0194] Please refer to Figure 1a , which is a schematic diagram of the architecture of the communication system 1000 to which the embodiments of the present application are applied. As Figure 1a shown, 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. Among them, RAN 100 includes at least one RAN node (such as Figure 1a 110a and 110b in Figure 1a120a - 120j in it, collectively referred to as 120). RAN100 may also include other RAN nodes, for example, wireless relay devices and / or wireless backhaul devices ( Figure 1a not shown in the figure). 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 wiredly. The core network devices in the core network 200 and the RAN nodes 110 in the RAN100 may be independent different physical devices, or may be the same physical device integrating the logical functions of the core network devices and the logical functions of the RAN nodes. Terminals can be connected to each other, and RAN nodes can be connected to each other, either wiredly or wirelessly.

[0195] RAN100 may be an evolved universal terrestrial radio access (E-UTRA) system, a new radio (NR) system, and a future radio access system defined in the 3rd generation partnership project (3GPP). RAN100 may also include two or more different radio access systems mentioned above. RAN100 may also be an open RAN (O-RAN).

[0196] RAN nodes, also known as radio access network devices, RAN entities, or access nodes, are used to help terminals access the communication system wirelessly. In one application scenario, RAN nodes may be base stations, evolved NodeBs (eNodeBs), transmission reception points (TRPs), next generation NodeBs (gNBs) in the 5th generation (5G) mobile communication system, next generation NodeBs in the 6th generation (6G) mobile communication system, or base stations in future mobile communication systems. RAN nodes may be macro base stations (such as Figure 1a 110a in the figure), or may be micro base stations or indoor stations (such as Figure 1a 110b in the figure), and may also be relay nodes or donor nodes.

[0197] In another application scenario, wireless access for a terminal can be assisted through the cooperation of multiple RAN nodes, where different RAN nodes respectively implement partial functions of a base station. For example, the RAN node can be a central unit (CU), a distributed unit (DU), or a radio unit (RU). Here, the CU completes the functions of the radio resource control protocol and the packet data convergence protocol (PDCP) of the base station, and can also complete the function of the service data adaptation protocol (SDAP); the DU completes the functions of the radio link control layer and the MAC layer of the base station, and can also complete partial or all of the functions of the physical layer. For specific descriptions of the above respective protocol layers, reference can be made to the relevant technical specifications of 3GPP. The RU can be used to implement the functions of receiving and transmitting radio frequency signals. The CU and the DU can be two independent RAN nodes, or can be integrated in the same RAN node, for example, integrated in the baseband unit (BBU). The RU can be included in radio frequency equipment, for example, included in the remote radio unit (RRU) or the active antenna unit (AAU). The CU can be further divided into two types of RAN nodes: CU-control plane and CU-user plane.

[0198] In different systems, the RAN node may have different names. For example, in the O-RAN system, the CU can be called an open CU (O-CU), the DU can be called an open DU (O-DU), and the RU can be called an open RU (O-RU). The RAN node in the embodiments of the present application can be implemented in the form of a software module, a hardware module, or a combination of a software module and a hardware module. For example, the RAN node can be a server loaded with the corresponding software module. The embodiments of the present application do not limit the specific technologies and specific device forms adopted by the RAN node. For the convenience of description, in the following text, the base station is used as an example of the RAN node for description.

[0199] 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 can also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal, etc. Terminals can be widely applied 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 home, smart office, smart wearables, 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. Embodiments of this application do not limit the specific technologies and specific device forms adopted by the terminal.

[0200] The base station and the terminal can be fixed in position or movable. The base station and the terminal can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on airplanes, balloons, and artificial satellites. Embodiments of this application do not limit the application scenarios of the base station and the terminal.

[0201] The roles of the base station and the terminal can be relative. For example, Figure 1a the helicopter or drone 120i in [diagram] can be configured as a mobile base station. For those terminals 120j that access the radio access network 100 through 120i, the terminal 120i is a base station; but for the base station 110a, 120i is a terminal, that is, the communication between 110a and 120i is through the radio air interface protocol. Of course, the communication between 110a and 120i can also be through the interface protocol between base stations. In this case, relative to 110a, 120i is also a base station. Therefore, both the base station and the terminal can be uniformly referred to as communication devices. Figure 1a The 110a and 110b in [diagram] can be referred to as communication devices with base station functions. Figure 1a The 120a - 120j in [diagram] can be referred to as communication devices with terminal functions.

[0202] Communication can be carried out between a base station and a terminal, between base stations, and between terminals through licensed spectrum, unlicensed spectrum, or both simultaneously; communication can be carried out through spectrum below 6 gigahertz (GHz), through spectrum above 6 GHz, or using both spectrum below 6 GHz and spectrum above 6 GHz simultaneously. Embodiments of this application do not limit the spectrum resources used for wireless communication.

[0203] In embodiments of this application, the functions of a base station can also be performed by a module (such as a chip) in the base station or by a control subsystem that includes base station functions. Here, the control subsystem that includes base station functions can be a control center in application scenarios such as smart grids, industrial control, intelligent transportation, and smart cities. The functions of a terminal can also be performed by a module (such as a chip or modem) in the terminal or by a device that includes terminal functions.

[0204] Figure 1b Another schematic diagram of a communication system provided by an embodiment of this application is shown in Figure 1b which, taking the network device as a base station as an example, both device 1 and device 2 are terminal devices. As Figure 1b shown, the communication link between device 1 and device 2 can be referred to as a sidelink (SL), and the communication link between device 1 (or device 2) and the base station can be referred to as an uplink and downlink, including an uplink and a downlink; it can be seen that the sidelink is a communication mechanism in which different terminal devices communicate directly without passing through a network device.

[0205] Optionally, in a sidelink (SL), generally speaking, the transmitting device and the receiving device can be terminal devices or network devices of the same type, or a roadside unit (RSU) and a terminal device. Here, from a physical entity perspective, the RSU is a roadside station or a roadside unit, and from a functional perspective, the RSU can be a terminal device or a network device, and this application does not limit 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 roadside station and the receiving device is also a roadside station; or, the transmitting device is a terminal device and the receiving device is a roadside station. Additionally, the sidelink can also be base station devices of the same type or different types. In this case, the function of the sidelink is similar to that of a relay link, but the air interface technology used can be the same or different.

[0206] Exemplarily, broadcasting, unicasting, and multicasting are supported on the sidelink.

[0207] Broadcast communication is similar to a network device broadcasting system information, that is, the terminal device sends broadcast service data externally without encryption. Any other terminal device within the effective reception range can receive the data of the broadcast service if it is interested in the broadcast service.

[0208] Unicast communication is similar to the data communication after establishing an RRC connection between a terminal device and a network device. A unicast connection needs to be established between two terminal devices first. After establishing the unicast connection, the two terminal devices can perform data communication based on the negotiated identifier. The data can be encrypted or unencrypted. Compared with broadcast, in unicast communication, only the two terminal devices that have established the unicast connection can perform the unicast communication.

[0209] Optionally, a unicast communication on the sidelink corresponds to a pair of source layer-2 identifiers (source layer-2 identifier, denoted as source L2 ID) and destination layer-2 identifiers (destination Layer-2 Identifier, denoted as destination L2 ID). Optionally, the source L2 ID and the destination L2 ID will be included in the sub-header of the media access control protocol data unit (MAC PDU) in the sidelink to enable the data to be transmitted to the correct receiving end.

[0210] Multicast communication refers to the communication between all terminal devices within a communication group. Any terminal device within the group can send and receive the data of the multicast service.

[0211] As Figure 1c shown, when a terminal device (denoted as UE1) communicates directly with another terminal device (denoted as UE2) without passing through a network device, the communication link between the two terminal devices can be called a sidelink, or the two terminal devices communicate based on the proximity-based services communication 5 (PC5) interface.

[0212] As Figure 1dAs shown, V2X communication technology, as a typical application of sidelink, utilizes and enhances current cellular network functions and elements to achieve low-latency and high-reliability communication among various nodes in a vehicle network, including vehicle-to-vehicle communication (abbreviated as V2V), vehicle-to-pedestrian communication (abbreviated as V2P), vehicle-to-infrastructure communication (abbreviated as V2I), and vehicle-to-network communication (abbreviated as V2N). As the cellular system evolves from 4G Long Term Evolution (abbreviated as LTE) to 5G, C-V2X evolves from LTE-V2X to NR-V2X (New Radio V2X, abbreviated as NR-V2X).

[0213] In addition, V2X communication has great potential in reducing vehicle collision accidents, and thus can also reduce the corresponding number of casualties. The advantages of V2X are not limited to improving safety. Vehicles capable of V2X communication contribute to better traffic management, further promoting green transportation and lower energy consumption. The Intelligent Transportation System (abbreviated as ITS) is an application that combines with V2X. Based on V2X technology, vehicle users (abbreviated as V-UE) can send some of their own information, such as location, speed, intentions (turning, lane changing, reversing), etc. information periodically and information triggered by some non-periodic events to surrounding V-UEs. Similarly, V-UEs will also receive information from surrounding users in real time. 5G NR V2X can support lower transmission latency, more reliable communication transmission, higher throughput, better user experience, and meet the needs of a wider range of application scenarios. Further, the vehicle-to-vehicle communication technology supported by V2X can be extended to device-to-device (abbreviated as D2D) communication under any system.

[0214] With the large-scale popularization of Internet applications and wireless network devices, people's demand for wireless communication has further increased. Communication technologies are also constantly evolving forward, from 4G to 5G to the next generation of communication. Communication spectra also range from low-frequency bands to high-frequency bands such as millimeter waves, terahertz, and optical communications. Future communication systems will not only have stronger communication capabilities but also possess sensing capabilities, being systems with integrated communication and sensing. Integrated communication and sensing can utilize the transmission, reflection, and scattering of radio waves to sense and characterize the environment, perform high-precision positioning and tracking, pose and activity recognition, simultaneous imaging, positioning, and map construction SLAM, and human sensory enhancement, etc. Future sensing has higher requirements for sensing accuracy and also has latency constraint requirements. For communication-sensing fusion systems, it is also hoped that sensing can help improve communication capacity.

[0215] Currently, in a communication system (such as Figures 1a to 1c any communication system), after the sending end sends a signal, the receiving end can send feedback information based on this signal, enabling the sending end to sense the receiving end based on this feedback information. In other words, in the case where there are multiple communication devices in physical space, after a communication device sends a signal, it can sense other communication devices based on the information fed back by other communication devices.

[0216] Exemplarily, taking the signal sent by the sending end as a reference signal. After the reference signal sent by the sending end is transmitted through the wireless channel and received by the receiving end, the signal received by the receiving end will possess the channel characteristics of this wireless channel. And the receiving end can measure this reference signal to obtain a measurement result (i.e., this measurement result can indicate the channel characteristics to a certain extent), and then can feedback this measurement result to the sending end. Correspondingly, the sending end can determine precoding information, signal transmission quality, etc. based on this measurement result. In other words, the receiving end can sense the sending end based on this reference signal, and correspondingly, the sending end can sense the receiving end based on this measurement result, that is, different communication devices sense each other through the transmission and reception of signals.

[0217] However, in the above implementation process, the sending end and the receiving end rely on the signals sent by the opposite end to achieve sensing. This implementation method is relatively cumbersome and has a high complexity.

[0218] To solve the above problems, the present application provides a communication method and related devices, which are used to enable the first signal sent by the first communication device to be used not only for the synchronization of other communication devices but also for the sensing of this first communication device, which can reduce the complexity of sensing implementation while also improving resource utilization rate to improve communication efficiency. The following will be introduced in detail with reference to the drawings.

[0219] Please refer to Figure 2 , which is a schematic diagram of the communication method provided by the present application.

[0220] It should be noted that, in Figure 2 (and in the following text Figure 3 ), taking the communication device as the execution entity of the information sending and receiving process as an example to illustrate the method, but the present application does not limit the execution entity of the information sending and receiving process. For example, in Figure 2 (and in the following text Figure 3 ), the execution entity of the method can be replaced by a chip, a chip system, a processor, a logic module or software in the communication device, etc. Among them, the first communication device can be an access network device, the second communication device in the following text Figure 3 can be a core network device or a cloud server, and the third communication device can be a terminal device. Or, the first communication device can be a terminal device, the second communication device in the following text Figure 3 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.

[0221] S201. The first communication device sends a first signal, and the first signal is used for synchronization.

[0222] S202. The first communication device receives a second signal, and the second signal is an echo signal of the first signal, and the second signal is used for sensing.

[0223] It should be understood that the echo signal of a signal (such as the echo signal of the first signal) can be understood as the signal sent by the sending device and formed after colliding with various obstacles in the physical space (such as at least one of reflection, diffraction or scattering) and reaching the sending device. Correspondingly, the echo signal being used for sensing can be understood as that the echo signal is used for sensing (or used to reflect) one or more of the obstacle information of the signal in the physical space, the transmission channel information formed by the collision of the signal with the obstacle, or the transmission path information.

[0224] In other words, in step S201, after the first communication device sends the first signal to the wireless channel, the first signal will form a second signal after colliding with various obstacles in the physical space through the transmission of the wireless channel, so that the first communication device can receive the second signal through the wireless channel in step S202.

[0225] Optionally, the echo signal can be replaced by other terms, such as a reflection signal, a sensing feedback signal, a sensing response signal, a detection response signal, a radar signal, etc.

[0226] Optionally, the echo signal is used for sensing (for example, the second signal is the echo signal of the first signal and is used for sensing). It can be understood that the echo signal is used for one or more of self-sensing, positioning, measurement, detection, channel sensing, monitoring, tracking, time measurement, distance measurement, angle measurement, speed measurement, Doppler shift measurement, point cloud measurement, intensity measurement, direction measurement, or sensing feedback.

[0227] Optionally, the sensing result obtained from the echo signal used for sensing can be applied to multiple services, such as one or more of environmental sensing, target recognition, target positioning and tracking, or target imaging. Among them, environmental sensing can include sensing one or more of geographical location, distance, speed, angle, map, attitude, scale, imaging, or material.

[0228] Optionally, the transmitting beam of the first signal and the receiving beam of the second signal can be the same beam (or adjacent beams). In this way, the receiving success rate of the second signal can be improved.

[0229] In a possible implementation manner, the process of the first communication device receiving the second signal in step S202 includes: the first communication device receives the second signal within a first time period. Specifically, during the process of the first communication device receiving the second signal, the first communication device can receive the second signal by means of signal detection within the first time period. Since the second signal is the echo signal formed by the collision of the first signal with the obstacles in the physical space, in this way, the first communication device can receive the second signal within the configured or pre-configured first time period, and can avoid the unnecessary overhead caused by the first communication device continuously detecting for a long time when the first communication device does not receive the second signal (for example, when the transmission loss of the first signal on the transmission path is large, or the distance of the obstacle that collides with the first signal is far, etc., resulting in a small energy of the echo signal, the first communication device may not successfully detect the second signal). Configuring the first time period can 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.

[0230] Exemplarily, in step S202, during the process of the first communication device receiving the second signal within the first time period, the first communication device can use one or more time units included in the first time period (described as the receiving window in some cases later) as a sliding window, and perform sliding reflection signal detection on each sampling point until reaching the last time unit of the first time period.

[0231] Optionally, when the above technical solution is applied to a half-duplex scenario or mode, the first communication device may not be able to perform signal reception and transmission on the same time unit. Therefore, during the process of the first communication device receiving the second signal in the first time period, the first communication device does not perform signal transmission. In other words, the first time period is not used for signal transmission.

[0232] Optionally, when the above technical solution is applied to a full-duplex scenario or mode, the first communication device can perform signal reception and transmission on the same time unit. Therefore, during the process of the first communication device receiving the second signal in the first time period, the first communication device can perform signal transmission. Generally, in order to avoid co-frequency interference, during the first time period, the first communication device can receive the second signal on a certain frequency band and perform other signal transmission and / or other signal reception on other frequency bands outside this frequency band.

[0233] In a possible implementation manner, as Figure 3 shown, compared with Figure 2 the method shown, this method further includes:

[0234] Step A. The second communication device sends the 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.

[0235] Specifically, the first communication device can also receive the first configuration information for configuring the first time period in step A (that is, the first configuration information includes the configuration information for configuring the first time period), so that the first communication device performs the reception of the second signal on the first time period based on the configuration of the second communication device, to improve the reception success rate of the first communication device for receiving the second signal.

[0236] Optionally, the first time period is pre-configured, and in this way, the configuration overhead can be saved.

[0237] Based on Figure 2 the technical solution, after the first communication device sends the first signal for synchronization in step S201, the first communication device can receive the second signal for sensing 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 (such as at least one of reflection, diffraction or scattering), so that the first communication device can realize sensing based on the echo signal of the first signal. Thus, compared with the implementation manner in which the signal sender depends on the feedback of the signal receiver to realize sensing, the first communication device realizes sensing through the echo signal of the first signal it sends, which can reduce the implementation complexity.

[0238] In addition, compared with realizing sensing through signals with a 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, based on this first signal, relatively accurate angle measurements can be made, so as to achieve better sensing performance with a smaller signal bandwidth.

[0239] In addition, the first signal sent by the first communication device can be used for synchronization, that is, after other communication devices receive this first signal, these other communication devices can obtain synchronization information (such as time-domain synchronization, frequency-domain synchronization, etc.) based on this first signal. In other words, after the first communication device sends the first signal, the first communication device can realize sensing based on the echo signal of this first signal, and other communication devices can obtain synchronization information based on this first signal. Thus, the first signal sent by the first communication device can be used both for the synchronization of other communication devices and for the sensing of this first communication device, which can improve resource utilization and communication efficiency.

[0240] For example, as Figure 3 shown, after the first communication device sends the first signal to the wireless channel in step S201, it is possible that this first signal will be received by other communication devices, enabling these other communication devices to obtain synchronization information based on this first signal.

[0241] In an implementation example, as described above, Figure 3 the first communication device shown can be an access network device. Correspondingly, the second communication device that sends the first configuration information in step A can be a core network device or a cloud server, and the third communication device that receives the first signal in step S201 can be a terminal device. Thus, after the access network device (such as a base station) sends the first signal in step S201, while enabling the terminal device to obtain synchronization information based on this first signal, it can also enable the access network device to realize self-sensing of the access network device based on the echo signal (i.e., the second signal) of this first signal in step S202.

[0242] Or, Figure 3 the first communication device shown can be a terminal device, and the second communication device in the following Figure 3 can be an access network device or a core network device or a cloud server, and the third communication device that receives the first signal in step S201 can be other terminal devices. Thus, after the terminal device sends the first signal in step S201, while enabling other terminal devices to obtain synchronization information based on this first signal, it can also enable this terminal device to realize self-sensing of this terminal device based on the echo signal (i.e., the second signal) of this first signal in step S202.

[0243] Optionally, Figure 2 orFigure 3 The method shown can also be applied to the implementation process of cooperative sensing. For example, after the first communication device receives the second signal and obtains a sensing result based on the second signal in step S202, the first communication device may send the sensing result to other devices to assist the other devices in performing sensing. For example, the other device may be a core network device, an access network device, or a terminal device. 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 sensing requirement for a certain area, the first communication device may participate in the sensing of the area and feed back the sensing result to the second access network device, so that the second access network device can achieve cooperative sensing based on the sensing results from one or more first communication devices.

[0244] In Figure 2 In the technical solution shown, there are various implementations of the first signal for synchronization sent by the first communication device in step S201, which will be introduced in detail below with reference to the accompanying drawings.

[0245] Implementation manner 1: In step S202, the first time period for the first communication device to receive the second signal may include a continuous time unit in the time domain.

[0246] In a possible implementation manner of implementation manner 1, the time domain position of the time domain resource carrying the first signal is 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. In other words, after the first communication device sends the first signal in step S201, it performs the reception of the second signal in the first time period adjacent to the time domain resource carrying the first signal, so that the solution can be applied to a half-duplex scenario, that is, the first communication device performs the reception of the second signal after sending the first signal.

[0247] As Figure 4a shown in the example, for the first communication device, the duration for performing the transmission of the first signal in step S201 may be a transmission window (Tx window) or a transmission symbol time, and the duration for performing the reception of the second signal in step S202 (i.e., this duration is the first time period described above) may be Figure 4a the "reception window (Rx window)" in Figure 4a . In

[0248] Optionally, in Figure 4aIn the illustrated example, 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 on an adjacent receive window after transmitting the first signal in the transmit window. Since the length of the transmission delay of the echo signal is positively correlated with the length or distance of the sensing distance, therefore, the implementation method that the first communication device can receive the second signal within a short time after transmitting the first signal can enable the solution to be applied to scenarios with a short sensing (or detection) distance.

[0249] Optionally, when the above technical solution is applied to a full-duplex scenario or mode, the first communication device can receive the second signal while transmitting the first signal. In other words, the time domain position of the time domain resource carrying the first signal can be before the first time period, or the time domain position of the time domain resource carrying the first signal can partially or completely overlap with the first time period, which is not limited here. The start and end times of the first time period depend on the distance requirement of sensing and detection. Since in the full-duplex mode, the first time period can overlap with the transmission time of the first signal, the solution can be applied to scenarios with a shorter sensing (or detection) distance.

[0250] It should be understood that the resource position of one resource being before or after the resource position of another resource can be a time domain front-back relationship. 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 this 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 this one resource is greater than the resource index of the other resource.

[0251] In a possible implementation manner, the first time period includes time resources for a guard period (GP). Specifically, the time resources for receiving within the first time period can include the 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 time interval of the GP to improve the reception success rate of the first communication device for receiving the second signal.

[0252] Optionally, when the first time period includes the time resources of the GP, the time resources of the GP can be one or more time units that are continuous in the time domain, and the time domain start position of the one or more time units is the same as the time domain start position of the first time period. In this way, the resource utilization rate can be improved.

[0253] Exemplarily, as Figure 4b shown, the GP can be located at the start position within the receive window, that is, the time adjacent to the transmit window is the GP.

[0254] In another possible implementation of Implementation Mode 1, the time domain position of the time domain resource carrying the first signal is 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. In other words, after the first communication device sends the first signal in step S201, in step S202, the first communication device performs the reception of the second signal in the first time period that is not adjacent to the time domain resource carrying the first signal, so that the solution can be applied to a half-duplex scenario, that is, the first communication device performs the reception of the second signal after sending the first signal.

[0255] As Figure 4c shown in the example, for the first communication device, the duration for performing the transmission of the first signal in step S201 can be a transmission window (Tx window) or a transmission symbol time, and the duration for performing the reception of the second signal in step S202 (that is, this duration is the first time period described above) can be Figure 4a the "reception window (Rx window)" in Figure 4c . In Figure 4c , the transmission window and the reception window are not adjacent, and the time interval "P" between them. It should be understood that in Figure 4c , the time interval "P" between the transmission window and the reception window can be independent of the transmission window and the reception window, can be included inside the transmission window, or can be included inside the reception window (as shown in Figure 4b for example), and is not limited here.

[0256] 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 after a certain time after sending the first signal. Since the length of the transmission delay of the echo signal is positively correlated with the length or distance of the sensing distance, therefore, through Figure 4c the setting of the time interval "P" between the transmission window and the reception window in

[0257] Optionally, 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 moreover, the first communication device can perform the transceiver conversion within the time interval of GP to improve the reception success rate of the first communication device for receiving the second signal.

[0258] Exemplarily, as Figure 4d shown, GP can be located within the time interval "P" between the transmission window and the reception window, that is, the time interval adjacent to the transmission window is used for GP. It should be understood that in Figure 4dIn this case, the GP of both the transmission window and the reception window can be independent of the transmission window and the reception window, or can be included inside the transmission window, or can be included inside the reception window (for example Figure 4b the implementation shown), which is not limited here.

[0259] It should be noted that the first signal transmitted by the first communication device in step S201 may include the synchronization information in a signal block (or called a synchronization signal block). Among them, the name of this signal block may be 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 sensing block (SEB), or other names.

[0260] As Figure 5a shown, taking this signal block as an SSB for example, generally, an SSB may include PSS, SSS, and PBCH. In the current NR system, as Figure 5a shown, in the time domain, an SSB may occupy 4 symbols, where 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, an SSB may occupy 240 subcarriers (i.e., subcarrier indices 0 - 239). Among them, PSS occupies 127 subcarriers (i.e., subcarrier indices 56 - 182) in the first symbol, SSS occupies 127 subcarriers (i.e., subcarrier indices 56 - 182) in the third symbol, PBCH occupies 240 subcarriers (i.e., subcarrier indices 0 - 239) in both the second symbol and the fourth symbol, and PBCH occupies 96 subcarriers (i.e., subcarrier indices 0 - 47, and carrier indices 192 - 239) in the third symbol.

[0261] In addition, the first signal transmitted by the first communication device in step S201 may include PSS and / or SSS. Since the propagation speed of wireless signals in space is equal to or close to the speed of light, therefore, in order to improve the success rate of the first communication device receiving the second signal within the reception window, it can be known from the description of the above implementation method 1 that the reception window for carrying the second signal is adjacent to the transmission window for transmitting the first signal in the time domain (or the two are separated by GP). However, from the above Figure 5aAs can be seen from the SSB resource pattern shown, if the current SSB resource pattern is continued and the PSS and / or SSS are used as the first signal, since the first communication device still needs to send the PBCH in the next symbol immediately after sending the PSS and / or SSS, in this case, whether the first communication device supports half-duplex or full-duplex, it will cause great interference to the echo signal corresponding to the PSS and / or SSS by the PBCH, and even the echo signal cannot be received. Therefore, this 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.

[0262] The following will be described in combination with Implementation Example A and Implementation Example B.

[0263] Implementation Example A, the first signal at least includes the secondary synchronization signal (SSS) in the signal block.

[0264] In Implementation Example A, the signal block is carried on N time units, and the first signal is carried on 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 the SSS, so that the receiver of the first signal (such as Figure 3 the third communication device in) can obtain the synchronization information carried by the SSS based on the SSS. And, the first signal may be carried on 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.

[0265] 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 slots, one or more sub-frames, one or more frames, etc.

[0266] As an implementation example of Implementation Example A, as Figure 5b shown, the signal block may be carried on 4 (taking N = 4 as an example) time units, the PSS is carried on the first time unit, the SSS is carried on the fourth time unit, and the PBCH is carried on the second time unit, the third time unit, and the fourth time unit. Taking each time unit as one symbol as an example, compared with Figure 5a shown in the SSB, the information carried by the third symbol and the fourth symbol of the SSB in Figure 5a can be exchanged (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 may include the SSS of the fourth symbol to avoid the interference caused by the PBCH to the reception window.

[0267] Optionally, the signal block further includes a primary synchronization signal (PSS). As Figure 5b shown in the example, the PSS is carried in the first time unit among the N time units. Specifically, the signal block transmitted by the first communication device may further include the PSS, so that the receiver of the first signal (e.g., Figure 3 the third communication device in ) can obtain the synchronization information carried by the PSS based on the PSS. Moreover, the PSS can be carried in the first time unit among the N time units. In this way, in addition to the receiver of the signal block being able to obtain the synchronization information carried by the PSS based on the PSS, it can also enable the receiver of the signal block to resolve other information (such as SSS and / or PBCH) of the signal block based on the synchronization information carried by the PSS, so as to improve the reception success rate of the other information.

[0268] Optionally, the signal block further includes a physical broadcast channel (PBCH) (or part of the information of the signal block is carried by the PBCH). As Figure 5b shown in the example, the PBCH is carried in the remaining N - 1 time units among the N time units except the first time unit. Specifically, the signal block transmitted by the first communication device may further include the PBCH, so that the receiver of the first signal (e.g., Figure 3 the third communication device in ) can obtain the system information carried by the PBCH based on the PBCH. Moreover, the PBCH being carried in the remaining N - 1 time units among the N time units except the first time unit can use as many time units as possible to carry the PBCH to carry more information.

[0269] It can be understood that in Figure 5b the example shown, using the SSS as the sensing signal, the subsequent reception window will not affect the PBCH. And the PSS is detected first as the first symbol. Since the number of sequences of the PSS is relatively less than that of the SSS, it helps to reduce the detection complexity. In addition, after the PSS is detected, it is used for channel estimation, which helps the subsequent signal detection and channel demodulation. The PBCH being located between the PSS and the SSS can make full use of the channel estimation of the front and back synchronization signals, which helps the PBCH demodulation to obtain better performance.

[0270] Optionally, in Figure 5b the example shown, the transmission beams of the PSS / SSS / PBCH can be the same beam. Correspondingly, the reception beam within the reception window can be the same beam as or an adjacent beam to the same beam, and the determination of the reception beam can be determined according to the reciprocity of the transceiver beams.

[0271] Optionally, the time length of the reception window (or the first time period) can be implemented in various ways. For example, the time length of the reception window (or the first time period) can be greater than or equal to the time length of the first signal, so as to be able to receive the complete echo signal (i.e., the second signal). Another example is that considering the coverage distance and selecting an integer number of symbols, the time length of the reception window (or the first time period) can be configured as 2 symbols.

[0272] Exemplarily, taking 240Khz SCS as an example, the single-symbol distance including CP can support a coverage of 1.35km. The reception window length is generally configured as 2 symbols or longer. When there is no potential conflict or interference and a longer coverage range is required, a reception window with a length greater than 2 symbols can be configured, and this symbol length corresponds to the symbol length of the sensing signal. Without loss of generality, this embodiment and the subsequent embodiments will be described by taking a 2-symbol reception window as an example. GP can typically be configured within the reception window. Since the reception detection is achieved by a sliding window to cover the variable arrival time of the reflected signal, the front time can also be left empty as GP without affecting the integrity of the entire reception window symbols. Optionally, it can also be reserved at the tail of the Tx symbol time.

[0273] In Figure 5b In the shown example, when the SSS has a fixed position, for the third communication device, during the process of 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, where n is the symbol where the PSS is located. When it is configured or detected that the SSS is at the n + 2 symbol, it corresponds to the communication mode or no self-sensing mode; when it is configured or detected that the SSS is at the n + 3 symbol, it corresponds to the SSS supporting the self-sensing mode. When the third communication device obtains that the mode is configured as the self-sensing mode, it can be considered that the time-frequency resources corresponding to the time window or the first time period (the time domain resources correspond to the resources where the reception 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 receiving data resources including this resource, the allocated data resources exclude this block of resources or perform rate matching on this block of resources, which is beneficial to the correct reception of data by the third communication device. Optionally, the configuration of the self-sensing mode or the rate matching of the data resources for the self-sensing reception window can also be indicated by the synchronization signal or the broadcast channel. Optionally, the configuration of the self-sensing mode or the rate matching of the data resources for the self-sensing reception window can also be pre-configured or predefined.

[0274] In a possible implementation of Implementation Example A, in addition to including SSS, the first signal further includes PSS in the signal block, and the PSS is carried in the last time unit among the N time units. Specifically, the first signal transmitted by the first communication device may further include PSS in the signal block, that is, the second signal includes both the echo signal of PSS and the echo signal of SSS. In this way, the first communication device can obtain as many echo signals as possible to improve the sensing performance.

[0275] As another implementation example of Implementation Example A, as Figure 5c shown, the signal block may be carried in 2 (taking N = 2 as an example) time units, both PSS and SSS are carried in the second time unit, and PBCH is carried in the first time unit and the second time unit. Taking each time unit as a symbol, compared with Figure 5a shown in the SSB, the SSB in Figure 5a can be reduced to two symbols for carrying, and PSS and SSS can be carried in the last symbol of the two symbols, so that the first signal includes PSS and SSS of the second symbol, and the transmission of PBCH is completed before the third symbol to avoid being unable to receive in the reception window due to the transmission of PBCH.

[0276] Optionally, as Figure 5c shown in the example, the signal block further includes PBCH, and the PBCH is carried in the N time units. Specifically, when the first signal transmitted by the first communication device includes PSS and SSS in the signal block, the signal block may further include PBCH, and the PBCH is carried in the N time units, which can use as many time units as possible to carry PBCH to carry more information.

[0277] It should be understood that in Figure 5c the shown example, the way of frequency division multiplexing PSS and SSS on the same time unit can reduce the delay and has a high gain for accessing delay-sensitive services. In addition, through Figure 5c the shown example, there can be resources for the reception window within the resources of 4 symbols, that is, PSS / SSS and PBCH occupy the first two symbols of the 4 symbols, and the last two symbols can be used for the reception window.

[0278] For Implementation Example B, the first signal includes PSS in the signal block.

[0279] In implementation example B, the signal block includes N time units, and the first signal is carried on the first time unit among the N time units, where N is an integer greater than 1; the first time period is located between the first time unit among the N units and the other N - 1 time units. Specifically, the first signal may include PSS, such that the receiver of the first signal (e.g., Figure 3 the third communication device in

[0280] can obtain the synchronization information carried by the PSS based on the PSS. Also, the first signal is carried on the first time unit among the N time units. And, the first time period is located between the first time unit among the N units and the other N - 1 time units. In this way, the subsequent first communication device can receive the second signal through the first time period after the first time unit.

[0281] 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 the information of the SSS and PBCH in the signal block. Specifically, in addition to including PSS, the signal block sent by the first communication device may also include SSS (or SSS and PBCH). In this way, the receiver of the signal block can obtain more synchronization information through the SSS (or SSS and PBCH). Figure 5d As an implementation example of implementation example B, as Figure 5a shown, the signal block can be carried on 4 (taking N = 4 as an example) time units. The time unit where the "reception window" is located in the figure is not included in the time units of the signal block. That is, the PSS is carried on the first time unit (the time unit before the reception window), the SSS is carried on the second time unit (the time unit after the reception window), and the PBCH is carried on the third and fourth time units. Taking each time unit as a symbol, compared with Figure 5a the SSB shown in

[0282] As another implementation example of implementation example B, as Figure 5e shown, the signal block can be carried on 2 (taking N = 2 as an example) time units. The time unit where the "reception window" is located in the figure is not included in the time units of the signal block. That is, the PSS is carried on the first time unit (the time unit before the reception window), and the SSS is carried on the second time unit (the time unit after the reception window). Compared with Figure 5d the example shown in Figure 5e inFigure 5d PBCH in it.

[0283] It should be understood that in Figure 5e the example shown, the PSS is a sensing symbol with a small number of sequence numbers and low detection complexity. While in Figure 5d the example shown, the PBCH is located at the end of the signal block, and channel demodulation can be performed using the channel estimation of the PSS or SSS.

[0284] In Implementation Example 2, in step S202, the first time period for the first communication device to receive the second signal may include two separated time units, and these two time units are each continuous time units in the time domain.

[0285] Exemplarily, as Figure 6a shown, the first signal may include Figure 6a signal 1_1 in it and signal 1_2 in it. In step S201, these two signals are respectively transmitted through Figure 6a transmission window 1 and transmission window 2 in it. The second signal may include Figure 6a signal 2_1 in it and signal 2_2 in it. In step S202, these two signals are respectively received through Figure 6a reception window 1 and reception window 2 in it. It should be noted that between adjacent transmission windows and reception windows (for example, between transmission window 1 and reception window 1, or between transmission window 2 and reception window 2), a GP can be configured, and there are multiple implementation manners for this GP. Specifically, reference can be made to the implementation process shown in the previous text Figures 4a to 4d shown.

[0286] 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 before the time domain position of the time domain resource carrying 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 before the time domain position of the time domain resource carrying 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. Correspondingly, as the echo signal of the first signal, 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 sensing respectively in two time units that are continuous in the time domain, so as to improve the sensing performance.

[0287] It should be understood that the first communication device may 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 may respectively receive these two echo signals in two time units that are continuous in the time domain.

[0288] Optionally, the time domain position of the time domain resource for carrying the echo signal of the PSS in the first time period is before the time domain position of the time domain resource for carrying the SSS. Specifically, the first communication device may send the SSS after receiving the echo signal of the PSS. In this way, the receiver of the first signal (such as Figure 3 the third communication device in

[0289] Exemplarily, as Figure 6b shown, compared with the implementation shown in Figure 5a it is possible to discard the PBCH, and after the PSS in the first signal is sent, the first communication device may receive the echo signal corresponding to the PSS within the reception window corresponding to the PSS, and after the SSS in the first signal is sent, the first communication device may receive the echo signal corresponding to the SSS within the reception window corresponding to the SSS.

[0290] In a possible implementation, the signal block further includes a PBCH; the time domain resources of the PBCH include at least one of the following: the time domain resources for carrying the PSS, the time domain position of the time domain resources for carrying the SSS, one or more time units before the time domain position of the time domain resources for carrying the PSS, and one or more time units after the time domain position of the time domain resources for carrying the SSS. Specifically, the signal block sent by the first communication device may further include a PBCH, so that the receiver of the first signal (such as Figure 3 the third communication device in

[0291] For example, as Figure 6c shown, after the PSS in the first signal is sent, the first communication device may receive the echo signal corresponding to the PSS within the reception window corresponding to the PSS, and after the SSS in the first signal is sent, the first communication device may receive the echo signal corresponding to the SSS within the reception window corresponding to the SSS. And, compared with the implementation shown in Figure 6b the PBCH includes several parts, one part is carried at the same time domain position as the PSS, and the other parts are carried at the same time domain position as the SSS.

[0292] It can be understood that in the implementation example shown in Figure 6c using both the PSS and the SSS as sensing signals helps to improve the quality of the sensing signal and improve the sensing accuracy. And, compared with the implementation example shown in Figure 5a in the implementation example shown in Figure 6b andFigure 6c In the illustrated example, since the signal block does not need to carry the PBCH through time units other than the time units where the PSS or SSS is located, the resource position of the PBCH can be configured to be used as the reception window of the PSS.

[0293] For another example, as Figure 6d shown, after the PSS in the first signal is sent, the first communication device can receive the echo signal corresponding to the PSS within the reception window corresponding to the PSS. After the SSS in the first signal is sent, the first communication device can receive the echo signal corresponding to the SSS within the reception window corresponding to the SSS. And, compared with Figure 6c the implementation shown, the PBCH can further include more information, and this information can be carried in one or more time units before the PSS.

[0294] For another example, as Figure 6e shown, after the PSS in the first signal is sent, the first communication device can receive the echo signal corresponding to the PSS within the reception window corresponding to the PSS. After the SSS in the first signal is sent, the first communication device can receive the echo signal corresponding to the SSS within the reception window corresponding to the SSS. And, compared with Figure 6c the implementation shown, the PBCH can further include more information, and this information can be carried in one or more time units after the time window corresponding to the SSS.

[0295] It can be understood that in the Figure 6d and Figure 6e illustrated implementation examples, the position of the PSS remains unchanged, the position of the SSS is shifted backward, the position of the PBCH is shifted forward or backward, and the reception window is configured after the PSS / SSS. Figure 6d The advantage of the illustrated implementation example is that the time expansion of the reception window of the SSS will not affect the resources of the PBCH. Figure 6e The advantage of the illustrated implementation example is that the channel estimation of the PBCH can be obtained through the PSS and the SSS, without pre-storing and waiting for the reception of the PSS and the SSS.

[0296] It should be understood that in the above description process, the signal block including one or more of the PSS, the SSS or the PBCH is regarded as a whole, and various implementation manners between the signal block and the reception window are described. In practical applications, one or more of the PSS, the SSS or the PBCH and the reception window can also be regarded as a whole, and more implementation examples will be described below.

[0297] In a possible implementation, the first signal and the second signal are carried on M time units, where M is an integer greater than or equal to 1; among them, N of 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, 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 on M time units, that is, the first communication device can complete the transmission and sensing of the synchronization signal within the M time units. In addition, N of 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.

[0298] Exemplarily, in the foregoing Figure 4a shown example, the transmission window and the reception window can be regarded as a whole, that is, the time units occupied by the whole can be M time units, the transmission window occupies N time units, and the starting time unit of the whole is the same as the starting time unit of the transmission window.

[0299] In a possible implementation, the N time units are consecutive time units in the time domain. In this case, the first time period for receiving the second signal can be implemented in multiple ways:

[0300] Method 1. Among the M time units, the other M - N time units after the N time units are used to carry the second signal. Taking Figure 4a as an example, the other M - N time units are Figure 4a the reception window in, and the reception window can be the first time period for receiving the second signal.

[0301] Method 2. Among the M time units, the other M - N time units after the N time units are used to carry the GP and the second signal. Exemplarily, taking Figure 4b as an example, some of the other M - N 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 (that is, Figure 4b the transmission window and the GP are adjacent in).

[0302] Method 3. Among the M time units, P time units adjacent to the N time units are used to carry the GP, and the M - N - P time units after the P time units are used to carry the second signal. Exemplarily, taking Figure 4d as an example, the M - N - P time units are the first time period for receiving the second signal (that is, Figure 4dThe time interval P between the transmission window and the reception window is used for GP, and P is a positive integer.

[0303] In addition, when considering one or more of PSS, SSS, or PBCH and the reception window as a whole (i.e., M time units), if the first signal includes PSS and / or SSS, then there can also be multiple corresponding implementation manners for PSS and / or SSS. Some implementation examples will be further described below.

[0304] As an implementation example of Implementation Example A, the first signal includes SSS, and the SSS is carried on the last time unit of the N time units. Specifically, the first signal can include SSS, so that the receiver of the first signal (such as Figure 3 the third communication device in) can obtain the synchronization information carried by the SSS based on the SSS. And, among the M time units, the first signal can be carried on 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.

[0305] Exemplarily, taking the reception window occupying two time units as an example, in the foregoing Figure 5b shown example, if each time unit is a symbol, then one or more of PSS, SSS, or PBCH and the reception window can be regarded as a whole, that is, the whole can include Figure 5b 6 (M takes the value of 6) symbols in, the signal block can include 4 symbols, and, the 4 symbols and the starting symbol of the 6 symbols are the same. In Figure 5b the SSS is located at the last symbol of the 4 symbols.

[0306] Optionally, the SSS is included in the signal block, and the signal block also includes PSS; as Figure 5b shown in the example, the PSS can be carried on the first time unit of the N time units, or, Figure 5c shown in the example, the PSS is carried on the last time unit of the N time units. Specifically, the signal block sent by the first communication device can also include PSS, so that the receiver of the first signal (such as Figure 3The third communication device) can obtain the synchronization information carried by the PSS based on the PSS. Moreover, the PSS can be carried in the first time unit among the N time units. In this way, the receiver of the signal block can not only obtain the synchronization information carried by the PSS based on the PSS, but also enable the receiver of the signal block to parse other information (such as SSS and / or PBCH) of the signal block based on the synchronization information carried by the PSS, so as to improve the reception success rate of the other information. In addition, the PSS can also be carried in the last time unit among the N time units to improve the flexibility of the scheme implementation, reduce the latency and energy consumption.

[0307] In a possible implementation manner, the signal block further includes a PBCH; as Figure 5b shown in the example, the PSS in the signal block is carried in the first time unit among the N time units, and the PBCH is carried in the remaining N - 1 time units among the N time units except the first time unit; or, as Figure 5c shown in the example, the PSS in the signal block is carried in the last time unit among 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, and as many time units as possible can be used to carry the PBCH to carry more information.

[0308] It should be noted that the PSS / SSS / PBCH included in the signal block may also refer to the implementation manners shown in the previous text Figure 5d or Figure 5e shown.

[0309] In a possible implementation manner, among the M time units, the N time units used to carry the signal block include k time units and N - k time units. The k time units are consecutive time units in the time domain, the N - k time units are consecutive 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 N - k time units and the ending time unit of the M time units are the same time unit, and k is a positive integer.

[0310] Exemplarily, as shown in the previous text Figure 6a the example, the k time units among the N time units can be Figure 6a the time units included in transmission window 1 in Figure 6aThe time units included in the transmission window 2. In other words, the signals carried by the signal block may include signal 1_1 transmitted through transmission window 1 and signal 1_2 transmitted through transmission window 2. Correspondingly, the first time period may include Figure 6a the reception window 1 and reception window 2 in, that is, the first communication device may also perform the reception of two signals at reception window 1 and reception window 2 respectively.

[0311] Similarly, in this case, the first time period for receiving the second signal can be implemented in multiple ways:

[0312] Way 4. Among the M time units, the other M - N time units except the N time units are used to carry the second signal (i.e., the first time period).

[0313] Way 5. Among the M time units, the other M - N time units except the N time units are used to carry GP and the second signal (i.e., the first time period), and the time domain resources carrying GP are adjacent to the k time units.

[0314] Way 6. Among the M time units, P time units adjacent to the k time units are used to carry GP, and the M - N - P time units after the P time units are used to carry the second signal (i.e., the first time period), where P is a positive integer.

[0315] Specifically, the N time units for carrying the signal block may include two segments of time units that are continuous in the time domain respectively, and GP can also be carried in the M time units in the above - mentioned multiple ways, so that the scheme can be applied to the half - duplex scenario, and the first communication device can perform transceiver conversion within the time interval of GP to improve the reception success rate of the first communication device for receiving the second signal.

[0316] As an implementation example, the first signal includes SSS and PSS in the signal block; SSS in the signal block is carried in the first time unit of the N - k time units, and PBCH in the signal block is carried in the N time units. Specifically, the first signal may also include SSS and PSS in the signal block, and SSS in the signal block is carried in the first time unit of the N - k time units, and PBCH in the signal block is carried in the N time units. In this way, the first communication device realizes sensing in two segments of time units that are continuous in the time domain respectively to improve the sensing performance. Among them, SSS and PSS in the N time units can refer to the Figures 6b to 6e implementation shown above.

[0317] It should be noted that the above Figures 5a to 5e , and Figures 6b to 6eThe implementation example shown takes the implementation process where the first signal includes PSS / SSS in the SSB as an example. That is, in the above implementation example, the signal block for carrying the first signal can be the SSB (or a signal block containing the SSB). As described above, there can be other implementations for this signal block. Below, more implementation examples will be used to exemplarily describe the implementation where the signal block is the SL-SSB (or the signal block is a signal block containing the SL-SSB).

[0318] It should be understood that in the following Figures 6f to 6n , an example is given where one time slot contains 14 symbols (i.e., the corresponding CP is the normal CP).

[0319] As Figure 6f , in the traditional SL-SSB, the physical sidelink broadcast channel (PSBCH) occupies a total of 10 symbols, namely symbol 0, symbols 5 to 12. The last symbol is a gap (GAP), which can be used for the protection time of automatic gain control (AGC) conversion or transceiver conversion. Also, the sidelink primary synchronization signal (SL-PSS or S-PSS) is repeatedly transmitted and occupies the second and third symbols (i.e., symbol 1 and symbol 2 in the figure); the sidelink secondary synchronization signal (SL-SSS or S-PSS) is repeatedly transmitted and occupies the fourth and fifth symbols (i.e., symbol 3 and symbol 4 in the figure).

[0320] As in the previous implementation, the first signal can include S-PSS and / or S-SSS in the SL-SSB. Below, some implementation examples will be provided to exemplarily describe various implementations of the first signal.

[0321] As Figure 6g shown in the example, when S-SSS is used as the sensing signal (i.e., the first signal includes P-SSS), a reception window can be added after S-SSS, occupying 2 PSBCH symbols. In other words, replace the PSBCH in symbol 5 and symbol 6 in Figure 6f with a reception window.

[0322] While in Figure 6h the example shown, compared with Figure 6g the example shown, the symbols used by PSBCH can be extended to the next time slot while keeping the total number of PSBCH symbols unchanged. In other words, insert 2 symbols as a reception window after symbol 4 in Figure 6f , and Figure 6fThe information carried by the original symbols 5 to 13 is extended backward to obtain Figure 6h the symbols 7 to 15 therein. Additionally, when marking the symbol index with 14 symbols per time slot, the symbols 14 and 15 here correspond to the symbol indices 0 and 1 of the next sidelink time slot.

[0323] As Figure 6i shown in the example, corresponding to 2 S-SSSs both being sensing signals, the second sensing signal needs to be shifted backward, and reception time windows are added respectively after the 2 S-SSSs. Each of the 2 reception windows occupies 2 symbols, resulting in 5 available symbols for PSBCH. In other words, replacing the S-SSS in symbol 4 and the PSBCH in symbol 5 in Figure 6f with reception windows of 2 symbols, and, replacing the PSBCH in symbols 6 to 8 in Figure 6f with 1 symbol of S-SSS and 2 symbols of reception window.

[0324] While in Figure 6j the shown example, compared with the example shown in Figure 6i , the symbols used for PSBCH can be extended to the next time slot while keeping the total number of symbols of PSBCH unchanged. In other words, inserting 2 symbols as reception windows after symbol 3 in Figure 6f , and inserting 2 symbols as reception windows after symbol 4 in Figure 6f , while the information carried by the original symbols 5 to 13 in Figure 6f is extended backward to obtain Figure 6j the symbols 9 to 17 therein. Additionally, when marking the symbol index with 14 symbols per time slot, the symbols 14 to 17 here correspond to the symbol indices 0 to 3 of the next sidelink time slot.

[0325] As Figure 6k shown in the example, corresponding to 2 consecutive S-SSSs both being sensing signals, reserving 3 symbols as reception windows after the latter S-SSS. In other words, replacing the PSBCH in symbols 5 to 7 in Figure 6f with reception windows.

[0326] While in Figure 6l the shown example, compared with the example shown in Figure 6k , the symbols used for PSBCH can be extended to the next time slot while keeping the total number of symbols of PSBCH unchanged. In other words, inserting 3 symbols as reception windows after symbol 4 in Figure 6f , while the information carried by the original symbols 5 to 13 in Figure 6f is extended backward to obtain Figure 6hSymbols 8 to 16 therein. Additionally, when marking the symbol index with 14 symbols per time slot, symbols 14 to 16 here correspond to symbol indices 0 to 2 of the next sidelink time slot.

[0327] As Figure 6m shown in the example, corresponding to the last S-PSS and the last S-SSS respectively as sensing signals, a sensing window is reserved after them, resulting in a reduction in the available symbols of the PSBCH. In other words, Figure 6f the S-SSS in symbols 3 and 4 therein is replaced with a receiving window of 2 symbols, and Figure 6f symbols 5 and 6 therein are replaced with 2 symbols of S-SSS, and Figure 6f the PSBCH in symbols 7 and 8 therein is replaced with a receiving window of 2 symbols.

[0328] While in Figure 6n the example shown, compared to Figure 6m the example shown, the symbols used by the PSBCH can be extended to the next time slot, keeping the total number of symbols of the PSBCH unchanged. In other words, Figure 6f 2 symbols are inserted after symbol 2 therein as a receiving window, and Figure 6f 2 symbols are inserted after symbol 4 therein as a receiving window, while Figure 6f the information carried by the original symbols 5 to 13 therein is extended backward to obtain Figure 6j symbols 9 to 17 therein. Additionally, when marking the symbol index with 14 symbols per time slot, symbols 14 to 16 here correspond to symbol indices 0 to 3 of the next sidelink time slot.

[0329] Similarly, part or all of the S-PSS and / or part or all of the S-SSS can be used as sensing 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, sensing can be achieved in scenarios where the signal block is SL-SSB (or the signal block includes SL-SSB), enabling the scheme to be applied to sidelink scenarios. In other words, the first communication device that sends the first signal in step S01 can be a terminal device or a terminal communication sensing fusion device, etc.

[0330] It should be noted that in Figures 6f to 6n , each signal in the SL-SSB (such as S-PSS / S-SSS / PSBCH) can refer to the description of each signal (PSS / SSS / PBCH) in the previous SSB. And Figures 6f to 6n the receiving window therein can also refer to the description of the receiving window (or the first time period) in the previous implementation example.

[0331] As described above, the first signal may be a part of the signal block. In other words, in step S201, the first communication device may send a signal block that includes the first signal. Among them, the signal block contains information for synchronization (such as PSS and / or SSS). For this reason, the signal block may also be referred to as a synchronization signal block. Generally, in order to improve the implementation flexibility of the signal block, it can be sent in the form of a signal block set. Below, more implementation examples will be combined to introduce the implementation method of the signal block set.

[0332] In a possible implementation manner, 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. Correspondingly, as Figure 3 shown, the method may further include:

[0333] Step B. The second communication device sends second configuration information. Correspondingly, the first communication device receives the second configuration information, and the second configuration information is used to configure the signal block set.

[0334] 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 of the first time period, transmission beam information for sending the signal blocks in the signal block set, or reception beam information for the echo signals of some or all of the signals in the signal blocks in the signal block set. In this way, multiple detections can be achieved through the transmission of multiple signal blocks to improve the detection performance.

[0335] In addition, different signal blocks in the signal block set may be sent through different communication beams. For this reason, the first communication device can achieve detections in different beam directions based on the detections of different signal blocks sent through different communication beams to improve high-precision detection. In addition, the number of repeated transmissions of the same signal block in the signal block set through the same beam can also be configured to improve the reception quality of the detection signal and improve the detection performance.

[0336] In this application, the signal block set can be replaced by other terms, for example, signal block burst, signal block burst set, etc.

[0337] Optionally, the signal block set may include multiple signal blocks. Further, the signal block set includes multiple signal blocks on the same frequency band. In other words, multiple signal blocks in the same signal block set can be transmitted through the same frequency-domain resources to reduce the implementation complexity and save communication resources.

[0338] Optionally, for multiple signal blocks included in the same signal block set, they can be transmitted with different parameters. For example, different signal blocks can correspond to different sensing tasks, such as different sensing distances, different sensing ranges, different sensing time delays, different sensing angles, etc. Exemplarily, when different signal blocks can be transmitted with different parameters, the parameter can specifically include SCS, CP, the time length of the receiving window, and the beam pair of the transmitting beam and the receiving beam.

[0339] Optionally, in a signal block, in addition to the transmitting window or transmitting symbol, CP, and the receiving window or receiving symbol, control information can also be included, and this control information can indicate the signal parameters of the current signal block, such as SCS, CP length, GP length, the time length of the receiving window, etc.

[0340] Exemplarily, as Figure 7a shown in the implementation example, taking the signal block as the sensing block and the signal block set as the SEB block (SEB set) as an example. In Figure 7a , the same SEB set can include SEBs of 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 can be configured by higher layer signaling carrying the second configuration information, such as RRC signaling or LTE positioning protocol (LPP) signaling or NR positioning protocol a (NRPPa) signaling.

[0341] It should be noted that among the multiple signal blocks included in the signal block set, at least some signal blocks are implemented in multiple ways of the above-mentioned signal block containing the first signal (for the convenience of later reference, it will be denoted as the first type of signal block hereinafter). For the other signal blocks in the signal block set, these other signal blocks can be implemented in multiple ways of the first type of signal block, or these other signal blocks can also be implemented by traditional SSB (such as Figure 5a the SSB resource pattern shown, for the convenience of later reference, it will be denoted as the second type of signal block hereinafter), and some implementation examples will be introduced below.

[0342] Implementation method A: Among the multiple signal blocks included in the signal block set, at least some signal blocks are implemented in multiple ways of the first type of signal block, and for the other signal blocks in the signal block set, these other signal blocks can also be implemented by the second type of signal block.

[0343] Optionally, in Implementation A, the first type of signal block and the second type of signal block can be distinguished by waveforms. For example, the first type of signal block and the second type of signal block are any two different waveforms among the following: OFDM, single carrier, frequency modulated continuous wave (FMCW), orthogonal timefrequency space (OTFS), single carrier offset quadrature amplitude modulation (SC-OQAM), filter bank multicarrier-offset quadrature amplitude modulation (FBMC-OQAM), orthogonal frequency division multiplexing-offset quadrature amplitude modulation (OFDM-OQAM), etc.

[0344] Optionally, in Implementation A, if the signal block is an SSB (or is used to carry PSS / SSS / PBCH in the SSB), since the time domain symbols occupied by the signal block may be greater than 4 symbols (such as the implementation examples shown above Figure 5b 、 Figure 5d 、 Figure 6d or Figure 6e ), and the other symbols beyond 4 symbols are used as the reception window, this may cause conflicts with the symbols of other SSBs of adjacent beams. Therefore, some SSBs in the SSB set can be used as the first type of signal blocks, and other SSBs can be used as the second type of signal blocks, and they are distinguished by the SSB index. Some implementation examples will be described below.

[0345] Exemplarily, for the second type of signal block, the start symbol positions of each candidate SSB when the SCS is 240 KHz are shown in Table 2. Taking the type E (Case E) of SSB in NR as an example, for the 240 kHz SCS: the index X of the first symbol of the candidate SSB satisfies:

[0346] X = {8, 12, 16, 20, 32, 36, 40, 44} + 56 * n;

[0347] where n takes values of 0, 1, 2, 3, 5, 6, 7, 8.

[0348] Table 2

[0349]

[0350] As can be seen from Table 2, there are many candidate SSBs with a starting symbol interval of 4 symbols, that is, the candidate positions of the front and rear SSBs are adjacent. As shown in the previous example, for the first type of signal block, there may be a conflict when the interval from the adjacent SSB is 4 symbols. Further observation reveals that in Table 2, when 64 SSB beams are enabled, except for the data in the fifth column (i.e., the column where the value is "20" when n = 0) and the data in the ninth column (i.e., the column where the value is "44" when n = 0), other SSBs are adjacent to the next SSB, that is, the symbols of the SSBs corresponding to the data in other columns are continuous with the adjacent SSBs in the time domain.

[0351] In a possible implementation, when configuring 64 beams for the SSB, the SSBs corresponding to the data in the fifth column (i.e., the column where the value is "20" when n = 0) and the data in the ninth column (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 data in other columns (a total of 48 SSBs) can be used as the second type of SSB.

[0352] In another possible implementation, when the SSB is configured with 32 beams, the SSBs corresponding to the data in the second column (i.e., the column where the value is "8" when n = 0), the data in the fourth column (i.e., the column where the value is "16" when n = 0), the data in the sixth column (i.e., the column where the value is "32" when n = 0), and the data in the eighth column (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 SSBs corresponding to the data in other columns (a total of 32 SSBs) can be used as the second type of SSB.

[0353] In another possible implementation, when the SSB is configured with 32 beams, the SSBs corresponding to the data in the third column (i.e., the column where the value is "12" when n = 0), the data in the fifth column (i.e., the column where the value is "20" when n = 0), the data in the seventh column (i.e., the column where the value is "36" when n = 0), and the data in the ninth column (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 SSBs corresponding to the data in other columns (a total of 32 SSBs) can be used as the second type of SSB.

[0354] It should be noted that in Table 2, only the implementation process with an SCS of 240 KHz is taken as an example for illustration. In actual applications, the index table of the SSB corresponding to other SCS values (such as 30 kHz SCS, 120 kHz SCS, etc.) can also be improved. For example, by selecting the data in some columns of the above table as the first type of signal block and the data in other columns as the second type of signal block.

[0355] Implementation mode B: Among the multiple signal blocks included in the signal block set, different signal blocks are all implemented as the first type of signal blocks.

[0356] In a possible implementation mode of implementation mode B, in this signal block set, the interval between this signal block and an adjacent signal block is greater than 4 symbols. Exemplarily, as described above Figure 4a As shown, when the signal block is an SSB, the number of symbols occupied by an SSB in the NR system is 4. For this reason, in order to configure the first time period (i.e., the reception window) for receiving the second signal, in this signal block set, the interval between this signal block and an adjacent signal block is greater than 4 symbols, and the other symbols except the 4 symbols are used as the first time period (i.e., the reception window) for receiving the second signal. Compared with the interval of 4 symbols between traditional different SSBs, the configuration of the first time period can be achieved through a larger time interval, so as to achieve sensing through the second signal received in this first time period, reduce the interference in the sensing process, and can achieve sensing in a half-duplex scenario or mode.

[0357] In addition, as can be seen from the implementation process of implementation mode A described above, when a large number of SSBs are configured, there may be a conflict in resources between the SSS post-expanded symbols as the reception window and the first type of signal blocks and other SSBs. Therefore, it is necessary to optimize the candidate positions of SEBs or the candidate positions of enhanced SSBs to avoid interference between the front and rear SSBs. Generally, related to the SCS size and carrier frequency, within a time window of a half-frame (i.e., 5 ms), corresponding to an SSB burst or an SSB set, the SSBs in NR support different time domain positions and SSB number configurations. For example, carriers with frequencies below 3 GHz support a maximum of 4 SSBs, those in the range of 3 - 6 GHz support a maximum of 8 SSBs, and those in the range of 6 - 52.6 GHz support a maximum of 64 SSBs. Some index configuration examples of implementation mode B will be given below.

[0358] As another implementation example, 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 this signal block set satisfies:

[0359] X = {8, 16, 32, 40} + 56 * n, n = 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18.

[0360] Exemplarily, the implementation process where X satisfies X = {8, 16, 32, 40} + 56 * n will be described below in combination with Table 2.

[0361] Table 3

[0362]

[0363]

[0364] As shown in Table 3, the values of each item in the table are the start symbol positions of each candidate SSB within a half-frame of 5 ms (240 KHz SCS). The index 0 corresponds to the first symbol of the first slot within the half-frame. For normal CP, 1 slot contains 14 symbols. As shown in Table 2 above, from index 0 to index 8, that is, from the first symbol 8 to the first symbol 488, it corresponds to the first 3 ms within the 5 ms detection window of the SSB set when the SCS is 240 KHz in Table 2 above. 4 slots correspond to 8 SSB positions or 1 slot contains 2 SSBs. And in Table 3, the index of the first symbol of the candidate SSB (or signal block) is {8, 16, 32, 40}+56*n. Where the value of the index n is, n = 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18. Further, this index can be expressed as {x1, x2, x3, x4}+56*n, where the value of the index n is, n = 0, 1, 2, 3, 5, 6, 7, 8, and x1, x2, x3, x4 are 4 numbers selected in ascending order at intervals from the set {8, 12, 16, 20, 32, 36, 40, 44}. That is, another set of first symbol index groups is {12, 20, 36, 44}.

[0365] In other words, through the method of Table 3, the implementation process of configuring one first type of signal block in one time slot (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 reception window.

[0366] Optionally, since the implementation method shown in Table 3 can be adapted to the implementation method of placing control information in the symbols in front of the SSB.

[0367] As another implementation example, the subcarrier spacing of the signal blocks in the signal block set is 240 kHz, and the start symbol index X of the signal blocks in this signal block set satisfies (hereinafter referred to as Method 1):

[0368] X = {6, 12, 18, 24, 32, 38, 44, 50}+56*n, n = 0, 1, 2, 3, 5, 6, 7, 8.

[0369] From the above implementation, it can be seen that considering 1 slot to configure 2 first type of signal blocks. The first symbol corresponding to each first type of signal block is {6, 12, 18, 24, 32, 38, 44, 50}+56*n, n = 0, 1, 2, 3, 5, 6, 7, 8.

[0370] As another implementation example, 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 (hereinafter referred to as Method 2):

[0371] {2, 8, 16, 22, 30, 36, 44, 50} + 56 * n, n = 0, 1, 2, 3, 5, 6, 7, 8.

[0372] As can be seen from the above implementation, considering 1 slot to configure the first type of signal block, but the starting symbol corresponding to each first type of signal block is {2, 8, 16, 22, 30, 36, 44, 50} + 56 * n, n = 0, 1, 2, 3, 5, 6, 7, 8.

[0373] One of the differences between Method 1 and Method 2 is that the position of the SSB or SEB close to the starting symbol of the slot is placed behind. According to the end positions 13, 27, 41, 55 of each slot in the first 4 slots; the starting positions 0, 14, 28, 42, it can be seen that the starting symbol of the third slot in Method 1 corresponds to 44, while in Method 2 it is placed in the front, such as the starting symbol 2 position of the first slot. Both can avoid the interference of the front and rear SSBs.

[0374] As an implementation example, the subcarrier spacing of the signal blocks in the signal block set is 30 kilohertz (kHz), and the starting symbol index X of the signal blocks in the signal block set satisfies:

[0375] X = {2, 8, 16, 22} + 28 * n, n = 0 or 0, 1.

[0376] As can be seen from the above implementation, the above values of X satisfy that 1 slot contains 2 first type of signal blocks. Compared with the original SSB candidate positions, the intermediate spacing is enlarged. Then the starting symbol indexes corresponding to the candidate SSBs or SEBs are {2, 8, 16, 22} + 28 * n, n = 0 or 0, 1.

[0377] As an implementation example, the subcarrier spacing of the signal blocks in the signal block set is 30 kilohertz (kHz), and the starting symbol index X of the signal blocks in the signal block set satisfies:

[0378] X = {4, 16} + 28 * n, n = 0, 1 or 0, 1, 2, 3.

[0379] As can be seen from the above implementation, the above values of X satisfy that 1 slot contains 1 first type of signal block, {4, 16} + 28 * n, n = 0, 1 or 0, 1, 2, 3, which can satisfy each symbol in a 5 ms window (140 symbols). Both can avoid the interference of the front and rear SSBs.

[0380] 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:

[0381] X = {2, 8, 16, 22} + 28 * n, where n = 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18;

[0382] As can be seen from the above implementation, the values of X above satisfy that 1 slot contains 2 signal blocks of the first type.

[0383] It should be understood that for Case A with SCS of 15 KHz (or Case C corresponding to 30 KHz or Case F corresponding to 480 KHz and Case G corresponding to 960 KHz), the different SSB intervals of 6 or 7 symbols can basically meet the requirements of the signal blocks of the first type for the reception window of the extended symbols.

[0384] Based on the above technical solution, in the signal block set, the starting symbol indices of different signal blocks satisfy one or more of the above. In this way, the configuration of the first time period can be achieved through a larger time interval, so as to perform sensing by the second signal received through the first time period, reduce the interference in the sensing process, and can achieve sensing in a half-duplex scenario or mode.

[0385] In a possible implementation manner, as Figure 3 shown, the method may further include:

[0386] Step C. The second communication device sends the third configuration information. Correspondingly, the first communication device receives the third configuration information, and the third configuration information includes at least one of the following: the configuration information of the 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, the configuration information of the time domain resources carrying the first signal and the second signal, and the configuration information for configuring the first time period. Specifically, the first communication device may also receive the third configuration information and perform the transmission of the first signal and the reception of the second signal based on the third configuration information to implement the above sensing process.

[0387] Optionally, the third configuration information in step C and at least two of the first configuration information in the previous step A and the second configuration information in step B 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 once. 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 the configuration information for configuring the first time period. Correspondingly, the same configuration message may carry the configuration information for the first time period once.

[0388] It can be seen from the above implementation process that the first signal can be implemented in various ways, and the first signal can be a part of the signal block. Correspondingly, as the receiver of the first signal, such as Figure 3 shown, the third communication device may receive the signal block in step S201 and parse the first signal including PSS / SSS based on the signal block, which will be described through some implementation examples below.

[0389] In a possible implementation manner, in step S201, the third communication device may receive the PSS in the signal block during the second time period (the second time period can be understood as the reception 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 sensing.

[0390] It should be noted that one or more of the PSS, SSS or PBCH in the signal block may refer to the description of any of the above implementation manners.

[0391] 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 the information in the signal block based on the one or more configuration information. The implementation of these configuration information may refer to the previous implementation process.

[0392] 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.

[0393] For example, during this 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 there are various positional relationships between the SSS and / or PBCH in the signal block, therefore, the third communication device can blindly detect 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.

[0394] For another example, during this second time period, the time-domain positional relationship between the PSS and the SSS is determined by the first information, and / or the time-domain positional 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 reception success rate of the third communication device for receiving the SSS and / or PBCH.

[0395] 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 then further receive the SSS and / or PBCH based on the time-domain positional relationship determined by the first information and / or the second information.

[0396] Optionally, the first information and / or the second information can be carried in other information, such as one or more of the first configuration information, the second configuration information, or the third configuration information.

[0397] As an application example, as Figure 7b shown in the scenario, it includes a core network device, an access network device, and a terminal device. Among them, the access network device is taken as a RAN network node, and the terminal device is taken as a UE. In the methods shown in the previous Figure 2 and Figure 3 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 sensing 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 sensing result. In addition, the core network device can include a network element for sensing result processing. Among them, the SEMF network element can be used to implement the sensing management function. For example, the SEMF network element can receive the sensing results from the RAN network node and / or the UE, and perform synthesis and / or calculation based on the received sensing results to obtain the results required by the sensing target, such as geographical location, distance, speed, angle, map, attitude, scale, imaging, material, etc.

[0398] As another application example, as Figure 7cThe scene shown includes an access network device and a terminal device. Among them, the access network device is taken as a RAN network node, and the terminal device is taken as a UE. Among them, the UE may include a connectionless UE, such as a passive UE, an idle UE, an inactive UE, a low-power UE, or may also be a connected UE. Similarly, as described above Figure 2 and Figure 3 In the method shown, 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 the Uu interface for communicating with the UE to obtain a sensing 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 the SL interface for communicating with other UEs to obtain a sensing result. In addition, a certain UE in the RAN network node or Figure 7c can be used to implement the sensing management function.

[0399] As another application example, as Figure 7d shown in the scene, as described above Figure 2 and Figure 3 In the method shown, the first communication device may include two sets of transceiver modules (such as two sets of hardware modules, or two sets of software modules, or two sets of transceiver chips, etc.). These two sets of transceiver modules are respectively denoted as control Tx / Rx and communication + sensing Tx / Rx in the figure, and the latter is used for both communication and sensing. Figure 7d In the scene shown, it can be understood that the first communication device can implement a communication and sensing fusion 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 the SL interface or the F1 interface or the NG interface, etc., such as for control and data interaction, sensing measurement reporting, including both communication data and sensing data, and both communication control information and sensing control information. And the SEMF network element can also communicate with other nodes and can also perform sensing measurements. This mode can maximize the sharing of communication and sensing software and hardware resources, and can also share communication and sensing spectrum resources.

[0400] As another application example, as Figure 7e shown in the scene, as described above Figure 2 and Figure 3 In the method shown, the first communication device may include two sets of transceiver modules (such as two sets of hardware modules, or two sets of software modules, or two sets of transceiver chips, etc.). These two sets of transceiver modules are respectively denoted as control Tx / Rx and sensing Tx / Rx in the figure, and the latter is used for sensing. Figure 7eIn the scenario shown, it can be understood that the first communication device can implement a dedicated sensing mode through two sets of transceiver modules. In this mode, the SEMF network element and the first communication device interact through the Uu interface, SL interface, F1 interface, NG interface, etc., for sensing control and data interaction, and sensing measurement reporting. The first communication device can receive control information to complete sensing 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 sensing signals.

[0401] Please refer to Figure 8 , an embodiment of the present application provides a communication device 800, which includes a transceiver unit 801 and a processing unit 802.

[0402] Optionally, the transceiver unit 801 can be replaced by an interface unit.

[0403] It should be understood that the communication device 800 can implement the functions of any communication device (such as the first communication device, the second communication device, or the third communication device) in the above method embodiments, and thus can also achieve the beneficial effects possessed by the above method embodiments. In the embodiment of the present application, the communication device 800 can be any communication device in the above method embodiments, or an integrated circuit or component inside any communication device in the above method embodiments, such as a chip.

[0404] In a possible implementation manner, when the device 800 is used to execute the method performed by the first communication device in the foregoing embodiment, the processing unit 802 is used to determine a first signal, and the transceiver unit 801 is used to send the first signal, and the first signal is used for synchronization; the transceiver unit 801 is further used to receive a second signal, and the second signal is an echo signal of the first signal, and the second signal is used for sensing.

[0405] In another possible implementation manner, when the device 800 is used to execute the method performed by the network device in the foregoing embodiment, the processing unit 802 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, and 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 sensing; the transceiver unit 801 is used to send the first configuration information.

[0406] In another possible implementation, when the device 800 is used to execute the method performed by the terminal device in the foregoing embodiment, the processing unit 802 is configured to determine second configuration information for configuring the signal block set; wherein, at least one signal block in the signal block set includes a first signal for synchronization, and an echo signal of the first signal is a second signal for sensing; the transceiver unit 801 is configured to send the second configuration information.

[0407] In another possible implementation, when the device 800 is used to execute the method performed by the network device in the foregoing embodiment, the processing unit 802 is configured to determine third configuration information for configuring the first signal and / or the second signal; wherein, the first signal is for synchronization, the second signal is for sensing, and the second signal is an echo signal of the first signal; the transceiver unit 801 is configured to send the third configuration information.

[0408] In another possible implementation, when the device 800 is used to execute the method performed by the network device in the foregoing embodiment, the transceiver unit 801 is configured to receive a primary synchronization signal PSS in a signal block during a second time period, and the first signal is for synchronization; the processing unit 802 is configured to receive a secondary synchronization signal SSS and / or a physical broadcast channel PBCH in the signal block based on the PSS during the second time period.

[0409] It should be noted that for the information execution process and corresponding technical effects of the units of the communication device 800 above, please refer to the description in the method embodiments shown in the foregoing of this application, which will not be elaborated here.

[0410] Please refer to Figure 9 , which is another schematic structural diagram of the communication device 900 provided by this application. The communication device 900 at least includes an input / output interface 901. Among them, the communication device 900 may be a chip or an integrated circuit.

[0411] Optionally, the communication device further includes a logic circuit 902.

[0412] Wherein, Figure 8 the shown transceiver unit 801 may be a communication interface, and the communication interface may be Figure 9 the input / output interface 901 among them. The input / output interface 901 may include an input interface and an output interface. Alternatively, the communication interface may also be a transceiver circuit, and the transceiver circuit may include an input interface circuit and an output interface circuit.

[0413] Among them, the logic circuit 902 and the input / output interface 901 can execute the methods performed by any communication device (such as a terminal device or a network device) in the foregoing method embodiments and achieve the corresponding beneficial effects, which will not be elaborated here.

[0414] In a possible implementation manner, Figure 8 the shown processing unit 802 can be Figure 9 the logic circuit 902 in

[0415] Optionally, the logic circuit 902 can be a processing device, and the functions of the processing device can be implemented partially or entirely by software. Among them, the functions of the processing device can be implemented partially or entirely by software.

[0416] Optionally, the processing device can include a memory and a processor. Among them, the memory is used to store a computer program, and the processor reads and executes the computer program stored in the memory to perform the corresponding processing and / or steps in any method embodiment.

[0417] Optionally, the processing device can only include a processor. The memory for storing the computer program is located outside the processing device, and the processor is connected to the memory through a circuit / wire to read and execute the computer program stored in the memory. Among them, the memory and the processor can be integrated together or physically independent of each other.

[0418] Optionally, the processing device can be one or more chips, or one or more integrated circuits. For example, the processing device can be one or more field-programmable gate arrays (FPGA), application specific integrated circuits (ASIC), system on chips (SoC), central processor units (CPU), network processors (NP), digital signal processing circuits (DSP), microcontroller units (MCU), programmable logic devices (PLD), or other integrated chips, or any combination of the above chips or processors, etc.

[0419] Please refer to Figure 10 , for the communication device 1000 involved in the above embodiments provided by the embodiments of the present application. The communication device 1000 can specifically be the communication device acting as a terminal device in the above embodiments.

[0420] Among them, it is a schematic diagram of a possible logical structure of the communication device 1000, and the communication device 1000 may include but is not limited to at least one processor 1001 and a communication interface 1002.

[0421] Further optionally, the device may further include at least one of a memory 1003 and a bus 1004. In the embodiments of the present application, the at least one processor 1001 is used to control and process the actions of the communication device 1000.

[0422] In addition, the processor 1001 may 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 devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in combination with the disclosure of the present application. The processor may 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 can 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 foregoing method embodiments, and will not be elaborated herein.

[0423] It should be noted that Figure 10 The shown communication device 1000 can specifically be used to implement the steps implemented by the terminal device in the foregoing method embodiments, and achieve the technical effects corresponding to the terminal device. Figure 10 For the specific implementation manners of the shown communication device, reference can be made to the descriptions in the foregoing method embodiments, and details will not be repeated here.

[0424] Please refer to Figure 11 , which is a schematic diagram of the structure of the communication device involved in the foregoing embodiments provided by the embodiments of the present application. The communication device may specifically be the network device in the foregoing embodiments. Among them, the structure of the communication device can refer to Figure 11 the structure shown.

[0425] The communication device includes at least one processor 1111 and at least one network interface 1114.

[0426] 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, through a bus. In the embodiments of the present application, this connection may include various interfaces, transmission lines, or buses, etc., and this embodiment does not limit this. 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 a 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.

[0427] The processor 1111 is mainly used to process communication protocols and communication data, and to control the entire communication device, execute software programs, and process the data of software programs. For example, it is used to support the communication device to perform the actions described in the embodiments. The communication device may include a baseband processor and a central processor. The baseband processor is mainly used to process communication protocols and communication data, and the central processor is mainly used to control the entire terminal device, execute software programs, and process the data of software programs. Figure 11 The processor 1111 in [the above] may integrate the functions of the baseband processor and the central processor. Those skilled in the art can understand that the baseband processor and the central processor may also be separate processors, interconnected through technologies such as a bus. Those skilled in the art can understand that the terminal device may include multiple baseband processors to adapt to different network modes, the terminal device may include multiple central processors to enhance its processing ability, and various components of the terminal device may be connected through various buses. The baseband processor may also be referred to as a baseband processing circuit or a baseband processing chip. The central processor may also be referred to as a central processing circuit or a central processing chip. The function of processing communication protocols and communication data may be built into the processor or stored in the memory in the form of a software program, and the processor executes the software program to implement the baseband processing function.

[0428] The memory is mainly used to store software programs and data. The memory 1112 may exist independently and be connected to the processor 1111. Optionally, the memory 1112 may be integrated with the processor 1111, for example, integrated within one chip. Among them, the memory 1112 can store the program code for implementing the technical solutions of the embodiments of the present application and be controlled by the processor 1111 to execute. Various computer program codes executed can also be regarded as the driver programs of the processor 1111.

[0429] Figure 11Only one memory and one processor are shown. 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, etc. 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 embodiments of the present application.

[0430] 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 signals from the antenna, convert the radio frequency signals into digital baseband signals or digital intermediate frequency signals, and provide the digital baseband signals or digital intermediate frequency signals to the processor 1111 so that the processor 1111 can further process the digital baseband signals or digital intermediate frequency signals, such as demodulation processing and decoding processing. In addition, the transmitter Tx in the transceiver 1113 is also used to receive the modulated digital baseband signals or digital intermediate frequency signals from the processor 1111, convert the modulated digital baseband signals or digital intermediate frequency signals into radio frequency signals, and transmit the radio frequency signals through one or more antennas 1115. Specifically, the receiver Rx can selectively perform one-stage or multi-stage down-conversion processing and analog-to-digital conversion processing on the radio frequency signals to obtain digital baseband signals or digital intermediate frequency signals, and the order of the down-conversion processing and the analog-to-digital conversion processing can be adjusted. The transmitter Tx can selectively perform one-stage or multi-stage up-conversion processing and digital-to-analog conversion processing on the modulated digital baseband signals or digital intermediate frequency signals to obtain radio frequency signals, and the order of the up-conversion processing and the digital-to-analog conversion processing can be adjusted. The digital baseband signals and the digital intermediate frequency signals can be collectively referred to as digital signals.

[0431] The transceiver 1113 can also be referred to as an interface unit, a transceiver unit, a transceiver, a transceiver device, an interface module, etc. Optionally, the devices in the interface unit for implementing the reception function can be regarded as a reception unit, and the devices in the interface unit for implementing the transmission function can be regarded as a transmission unit, that is, the interface unit includes a reception unit and a transmission unit. The reception unit can also be referred to as a receiver, an input port, a reception circuit, etc., and the transmission unit can be referred to as a transmitter, a transmitter, or a transmission circuit, etc.

[0432] It should be noted that Figure 11 The shown communication device can specifically be used to implement the steps implemented by the network device in the foregoing method embodiments and achieve the corresponding technical effects of the network device. Figure 11 For the specific implementation manners of the shown communication device, reference can be made to the descriptions in the foregoing method embodiments, and details are not described herein again.

[0433] An embodiment of the present application further provides a computer-readable storage medium for storing one or more computer-executable instructions. When the computer-executable instructions are executed by a computer, the processor executes the method described in any possible implementation manner of any communication device (such as the first communication device, the second communication device, or the third communication device) in the foregoing method embodiment.

[0434] An embodiment of the present application further 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 in any possible implementation manner of any communication device (such as the first communication device, the second communication device, or the third communication device) in the foregoing method embodiment.

[0435] An embodiment of the present application further provides a chip system, which includes at least one processor for implementing the functions involved in any possible implementation manner of any communication device (such as the first communication device, the second communication device, or the third communication device) in the foregoing method embodiment.

[0436] Optionally, the chip system further includes an interface circuit, and the interface circuit provides program instructions and / or data for the at least one processor. In a possible design, the chip system may further include a memory for storing necessary program instructions and data of the terminal device. The chip system may be composed of chips or may include chips and other discrete devices.

[0437] In a possible design, the chip system may further include a memory for storing necessary program instructions and data of any communication device in the foregoing method embodiment. The chip system may be composed of chips or may include chips and other discrete devices.

[0438] An embodiment of the present application further provides a communication system, and the network system architecture includes the first communication device in any of the foregoing embodiments.

[0439] Alternatively, the communication system includes the first communication device and the second communication device. Alternatively, the communication system includes the first communication device and the third communication device. Alternatively, the communication system includes the first communication device, the second communication device, and the third communication device.

[0440] In several embodiments provided by the present 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 illustrative. For example, the division of the units is a logical function division. In actual implementation, there may be other division methods. For example, 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 displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of devices or units can be in electrical, mechanical, or other forms.

[0441] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0442] In addition, in each embodiment of the present application, the functional units can be integrated into a processing module, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units. If the integrated units are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an 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. This computer software product 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 methods described in each embodiment of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0443] The above is only the specific implementation manner of the embodiments of the present application, but the protection scope of the embodiments of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the embodiments of the present application, and all should be covered by the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application should be subject to the protection scope 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 an instruction, and when the computer program or the 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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