Communication method and communication apparatus

Abstract

The present application provides a communication method and a communication apparatus which are applied to the field of wireless communications. In the technical solution provided by the present application, a low-power-consumption wake-up receiver of a terminal device can determine the monitoring position of a first synchronization signal according to a first synchronization raster, and monitor the first synchronization signal at the monitoring position, so as to determine the time domain position and the frequency domain position of the first synchronization signal, and receive the first synchronization signal, such that the low-power-consumption wake-up receiver can synchronously receive other signals (such as a low-power-consumption wake-up signal) by means of the first synchronization signal.

Description

Communication method and communication device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 31, 2024, with application number 202410148625.6 and application name “Communication Method and Communication Device”, the entire contents of which are incorporated by reference into this application. Technical Field

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

[0003] The 3rd Generation Partnership Project (3GPP) introduced a low power wake-up signal (LP-WUS) in Release 18 (R18) to support the low power consumption mechanism of terminal devices in R18. For example, a terminal device can use a low power wake-up receiver (LP-WUR) to listen for LP-WUS and wake up the main receiver after receiving the LP-WUS to perform paging procedures, random access procedures, or data reception and transmission, thereby achieving energy conservation.

[0004] However, after the introduction of LP-WUS, how to achieve LP-WUS reception synchronization has become an urgent problem to be solved. Summary of the Invention

[0005] The present application provides a communication method and a communication device, so that a low power wake up receiver (LP-WUR) of a terminal device can achieve LP-WUS reception synchronization.

[0006] In a first aspect, the present application provides a communication method, which is applied to a terminal device, wherein the terminal device includes a main receiver and a low-power wake-up receiver, and the method includes: determining a first synchronization grid; the low-power wake-up receiver of the terminal device monitors a first synchronization signal according to the first synchronization grid.

[0007] One possible implementation is that the terminal device includes a main receiver, and the main receiver can implement some or all of the functions of a low-power wake up receiver (LP-WUR). For example, a module for implementing the LP-WUR function can be included in the main receiver. For another example, the module included in the LP-WUR is part of the template included in the main receiver. Among them, when the terminal device is in a low-power state, the terminal device can turn on the LP-WUR.

[0008] One possible implementation is: the terminal device includes a main receiver and a first receiver, the main receiver can implement some functions of LP-WUR, and the first receiver can implement some functions of LP-WUR. For example, the module for implementing the LP-WUR function may include a first partial module and a second partial module, the first partial module may be included in the main receiver, and the second partial module may be included in the first receiver. For another example, the module in LP-WUR includes a first partial module and a second partial module, the first partial module is a partial module in the module included in the main receiver, and the second partial module is a partial module in the module included in the first receiver. Among them, when the terminal device is in a low power consumption state, the terminal device can turn on LP-WUR.

[0009] As an example, the method can be executed by a terminal device, or by a chip system, hardware circuit and / or software module applied to the terminal device.

[0010] As an example, the first synchronization signal may be a low power synchronous signal (LP-SS), and the LP-WUR of the terminal device may achieve downlink synchronization with the network device through the LP-SS, or the LP-WUR of the terminal device may achieve synchronization of the LP-WUR itself through the LP-SS, or achieve synchronization of the LP-WUR with the local clock, or achieve time deviation and / or frequency deviation of the LP-WUR to be limited to a certain range, or achieve no time deviation or frequency deviation of the LP-WUR. It should be noted that in some implementations, due to the low power design of the LP-WUR, the LP-WUR may not be able to receive the synchronization signal / physical broadcast channel block (synchronization signal / physical broadcast channel block, synchronization signal / PBCH block, SSB). Therefore, a new synchronization signal, such as LP-SS, may be designed for the LP-WUR, so that the LP-WUR can achieve synchronization of the LP-WUR itself through the LP-SS.

[0011] As an example, the first synchronization raster may be understood as a synchronization raster used when the LP-WUR of the terminal device receives the LP-SS.

[0012] As an example, the first synchronization grid may be predefined by the protocol.

[0013] In this technical solution, a new synchronization signal (such as LP-SS) can be designed for the LP-WUR of the terminal device. The LP-WUR of the terminal device can realize the synchronization of the LP-WUR itself by receiving the LP-SS, and then realize the reception synchronization of the LP-WUS. In this technical solution, the LP-WUR of the terminal device can determine the time domain position and frequency domain position of the LP-SS based on the first synchronization grid, thereby realizing the reception of the LP-SS. For example, the LP-WUR can determine the monitoring position of the LP-SS based on the first synchronization grid, and monitor whether there is LP-SS at the monitoring position. If LP-SS is detected at a certain monitoring position, the frequency domain position in the monitoring position can be considered as the frequency domain position of the LP-SS, and the time domain position in the monitoring position can be used as the time domain position of the LP-SS.

[0014] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: when the first synchronization signal is monitored according to the first synchronization grid, determining a second position for receiving the second synchronization signal according to the first position, the first position being the resource position where the low-power wake-up receiver monitors the first synchronization signal according to the first synchronization grid, the first synchronization signal and the second synchronization signal are two different types of synchronization signals, or the first synchronization signal and the second synchronization signal are the same type of synchronization signals with different beam directions.

[0015] As an example, the first position may include a time domain position and / or a frequency domain position.The resource position of the first synchronization signal may include a time domain resource and / or a frequency domain resource of the first synchronization signal.

[0016] As an example, when the first synchronization signal is LP-SS, the second synchronization signal may be SSB. It should be understood that the first synchronization signal and the second synchronization signal are synchronization signals of different types. In this case, the second synchronization signal may be received by the primary receiver.

[0017] As an example, the main receiver of the terminal device can achieve downlink synchronization with the network device through SSB, or the main receiver of the terminal device can achieve synchronization of the main receiver itself through SSB, or achieve synchronization of the main receiver with the local clock, or achieve the time deviation and / or frequency deviation of the main receiver to be limited to a certain range, or achieve that the main receiver has no time deviation or frequency deviation. Among them, when the working frequency band of the main receiver is the same as the working frequency band of LP-WUR, it can be considered that the frequency domain position of the first synchronization signal is the same as the frequency domain position of the second synchronization signal. The frequency domain position of the first synchronization signal is the frequency domain position in the first position, and the frequency domain position of the second synchronization signal is the frequency domain position in the second position. Among them, the working frequency band can also be called the working frequency point, the working center frequency point, the working frequency range, or the frequency domain unit, etc. The frequency domain unit is, for example, Hertz, resource block (RB), resource element (RE), etc.

[0018] As an example, when the first synchronization signal is an LP-SS signal, the second synchronization signal can be an LP-SS signal with a different beam direction. In this example, the first and second synchronization signals are of the same type, and the frequency domain location of the first synchronization signal is the same as the frequency domain location of the second synchronization signal. In this case, the second synchronization signal can be received by the LP-WUR.

[0019] As an example, different beam directions can be understood as different antennas transmitting the first synchronization signal and the second synchronization signal; or different beam directions can be understood as different indices of the beams transmitting the first synchronization signal and the second synchronization signal; or different beam directions can be understood as different spatial dimensions in which the first synchronization signal and the second synchronization signal are transmitted; or different beam directions can be understood as different spatial resources occupied by the transmission of the first synchronization signal and the second synchronization signal. The antenna transmitting the synchronization signal can also be understood as the antenna array or antenna direction for transmitting the synchronization signal.

[0020] As an example, the modulation scheme of LP-SS may include at least one of the following modulation schemes: on-off keying (OOK), frequency shift keying (FSK), or orthogonal frequency-division multiplexing (OFDM). For example, the modulation scheme of LP-SS may be a joint modulation scheme of OOK and OFDM, or a joint modulation scheme of FSK and OFDM. OOK modulation may be understood as signaling in part of the time domain resources and not signaling in part of the time domain resources. The joint modulation scheme of OOK and OFDM may be understood as using OOK modulation to carry part of the information and using OFDM modulation to carry other part of the information. For example, the joint modulation scheme of OOK and OFDM may be understood as using envelope detection to obtain part of the LP-SS information, using sequence carrying in the time domain resources with OOK information, and using correlation detection or sequence detection to obtain another part of the LP-SS information. The above-mentioned sequence may be one sequence or multiple sequences. For example, the joint modulation of OOK and OFDM can be understood as using OOK modulation to carry all information, while using sequences to carry information within the time domain resources containing the OOK information. The sequence can be one or more sequences. Sequences can be OFDM sequences, Zadoff-Chu (ZC) sequences, or small m sequences, without limitation. Time domain resources can also be referred to as time domain units or time domain ranges.

[0021] As an example, the modulation methods of the first synchronization signal and the second synchronization signal may be the same or different, and are not limited here. For example, the first synchronization signal and the second synchronization signal may both use OOK modulation, and the portion with the signal is not superimposed with the OFDM sequence. For another example, the first synchronization signal uses OOK modulation, the portion with the signal is not superimposed with the OFDM sequence, and the second synchronization signal uses sequence modulation, such as ZC sequence modulation or small m sequence modulation. For another example, the first synchronization signal uses OOK modulation, the portion with the signal is superimposed with an OFDM sequence, and the OFDM sequence is, for example, a ZC sequence or a small m sequence, and the second synchronization signal uses sequence modulation, such as the second synchronization signal can use ZC sequence modulation or small m sequence modulation.

[0022] In this implementation, the second position of the second synchronization signal can be determined based on the first position of the first synchronization signal monitored, so that the terminal device can only monitor the first synchronization signal and can obtain the frequency domain position and time domain position of the second synchronization signal without monitoring the second synchronization signal, thereby saving power consumption.

[0023] In combination with the first aspect, in certain implementations of the first aspect, the frequency domain position in the first position is an integer multiple of the subcarrier spacing.

[0024] In this implementation, the frequency domain position of the first synchronization signal is set to the first frequency domain position, which is an integer multiple of the subcarrier spacing. For example, if the subcarrier spacing is 15 kHz and the first frequency domain position is 2115850 kHz, since 2115850 kHz is not an integer multiple of 15 kHz, this frequency domain position is not the frequency domain position of LP-SS. For another example, if the subcarrier spacing is 15 kHz and the first frequency domain position is 2115750 kHz, since 2115750 kHz is an integer multiple of 15 kHz, this frequency domain position can be the frequency domain position of LP-SS. The first frequency domain position can be understood as the frequency domain position in the first position.

[0025] In some embodiments, the first frequency domain position is an integer multiple of the subcarrier spacing. This can also be understood as starting from the preset frequency domain position, and the frequency domain offset value of the first frequency domain position relative to the preset frequency domain position is an integer multiple of the subcarrier spacing. The preset frequency domain position can be obtained through signaling or set according to actual needs, and is not specifically limited here.

[0026] As an example, the preset frequency domain position may be an initial frequency domain position. It should be noted that, from the perspective of the system bandwidth of the communication system, the communication bandwidth of the entire communication system has an initial frequency domain position for the frequency domain resource. As an example, the preset frequency domain position may be a frequency domain position that has a preset offset from the initial frequency domain position. The preset offset may be set based on actual needs or obtained through signaling, and this application does not impose any specific limitations on this.

[0027] In combination with the first aspect, in certain implementations of the first aspect, there is a first preset relationship between the number of resources separated by the time domain position in the first position and the time domain position in the second position and the number of resources occupied by the first synchronization signal in the time domain and / or the number of resources occupied by the synchronization signal block SSB in the time domain.

[0028] As an example, resources may be understood as time domain resources or time domain units, such as system frames, subframes, seconds, milliseconds, time slots, symbols, or mini-slots.

[0029] As an example, the first preset relationship can be predefined by a protocol or preconfigured in the terminal device in advance, which is not limited here. For example, the first preset relationship can be preconfigured in the LP-WUR, main receiver or other storage device of the terminal device, which is not limited here.

[0030] In this implementation, after determining the time domain position of the first synchronization signal, the time domain position of the second synchronization signal can be determined based on the time domain position of the first synchronization signal and the first preset relationship, thereby saving power consumption.

[0031] In combination with the first aspect, in certain implementations of the first aspect, when the second synchronization signal is SSB, the main receiver of the terminal device monitors SSB according to the second synchronization grid. When the monitoring times are the same, there is an offset between the monitoring position determined according to the first synchronization grid and the monitoring position determined according to the second synchronization grid.

[0032] In this implementation, the terminal device's LP-WUR can determine the LP-SS monitoring position based on the first synchronization grid, and the terminal device's main receiver can determine the SSB monitoring position based on the second synchronization grid. To avoid transmission conflicts or collisions between the SSB monitoring position and the LP-SS monitoring position, an offset can be created between the LP-SS monitoring position and the SSB monitoring position. This improves the efficiency of the LP-WUR monitoring LP-SS and the main receiver monitoring SSB, thereby improving communication efficiency. For example, after the second synchronization grid is offset as a whole within the frequency domain, the first synchronization grid can be obtained.

[0033] In the second aspect, the present application provides a communication method, which is applied to a terminal device, wherein the terminal device includes a main receiver and a low-power wake-up receiver, and the method includes: determining a first resource location, where the first resource location is the resource location where the main receiver of the terminal device monitors SSB; and determining a second resource location where the low-power wake-up receiver of the terminal device receives a first synchronization signal based on the first resource location.

[0034] One possible implementation is that the terminal device includes a main receiver, which can implement some or all of the LP-WUR functionality. For example, the module for implementing the LP-WUR functionality can be included in the main receiver. In another example, the module included in the LP-WUR is part of a template included in the main receiver. When the terminal device is in a low-power state, the terminal device can enable the LP-WUR.

[0035] One possible implementation is: the terminal device includes a main receiver and a first receiver, the main receiver can implement some functions of LP-WUR, and the first receiver can implement some functions of LP-WUR. For example, the module for implementing the LP-WUR function may include a first partial module and a second partial module, the first partial module may be included in the main receiver, and the second partial module may be included in the first receiver. For another example, the module in LP-WUR includes a first partial module and a second partial module, the first partial module is a partial module in the module included in the main receiver, and the second partial module is a partial module in the module included in the first receiver. Among them, when the terminal device is in a low power consumption state, the terminal device can turn on LP-WUR.

[0036] As an example, the method can be executed by a terminal device, or by a chip system, hardware circuit and / or software module applied to the terminal device.

[0037] As an example, the first synchronization signal may be LP-SS, and the LP-WUR of the terminal device may achieve downlink synchronization with the network device through LP-SS, or the LP-WUR of the terminal device may achieve synchronization of the LP-WUR itself through LP-SS, or achieve synchronization of the LP-WUR with the local clock, or achieve limiting the time deviation and / or frequency deviation of the LP-WUR to a certain range, or achieve no time deviation or frequency deviation of the LP-WUR. It should be noted that in some implementations, due to the low power design of the LP-WUR, the LP-WUR may not be able to receive SSB. Therefore, a new synchronization signal, such as LP-SS, may be designed for the LP-WUR, so that the LP-WUR can achieve synchronization of the LP-WUR itself by receiving the LP-SS. It should be understood that LP-SS is only an example and not a limitation. For example, as long as the LP-WUR can achieve synchronization of the LP-WUR itself by receiving a certain signal, the signal can be considered as LP-SS. It should be understood that LP-SS can also be called other names, which are not limited here.

[0038] As an example, the first resource position may include a time domain position and / or a frequency domain position, and the second resource position may include a time domain position and / or a frequency domain position.

[0039] As an example, when the operating frequency band of the primary receiver is consistent with the operating frequency band of the LP-WUR, the network device can send LP-SS and SSB at the same frequency domain position but different time domain positions. Therefore, the frequency domain position of the SSB can be consistent with the frequency domain position of the LP-SS, and the time domain position of the SSB is different from the time domain position of the LP-SS, that is, the frequency domain position in the first resource position is the same as the frequency domain position in the second resource position, and the time domain position in the first resource position is different from the time domain position in the second resource position. The operating frequency band can also be referred to as an operating frequency point, an operating center frequency point, an operating frequency range, or a frequency domain unit. Frequency domain units are, for example, Hertz, RB, RE, etc.

[0040] In this technical solution, a new synchronization signal (such as LP-SS) can be designed for the LP-WUR of the terminal device. The LP-WUR of the terminal device can achieve synchronization of the LP-WUR itself by receiving the LP-SS, thereby achieving reception synchronization of the LP-WUS. In this technical solution, after the main receiver of the terminal device detects the SSB, it can determine the second resource position of the LP-SS based on the first resource position of the SSB detected, thereby achieving reception of the LP-SS. In this technical solution, the LP-WUR can determine the time domain position and frequency domain position of the LP-SS without monitoring the LP-SS, saving power consumption.

[0041] As an example, the first resource location and the second resource location may be predefined by a protocol.

[0042] In combination with the second aspect, in certain implementations of the second aspect, there is a second preset relationship between the number of resources separated by the time domain position in the first resource position and the time domain position in the second resource position and the number of resources occupied by the first synchronization signal in the time domain and / or the number of resources occupied by the SSB in the time domain.

[0043] As an example, a time domain position can be understood as a time domain resource, or as a resource, or as a moment, or as a time domain unit. A time domain unit can be, for example, a system frame, a subframe, a second, a millisecond, a time slot, a symbol, or a mini-time slot.

[0044] As an example, the second preset relationship may be predefined by a protocol or preconfigured in the terminal device in advance, which is not limited here.

[0045] In this implementation, when determining the time domain position of the SSB, the main receiver or LP-WUR of the terminal device can determine the time domain position of the LP-SS based on the second preset relationship. This allows the terminal device to determine the frequency domain position and time domain position of the LP-SS without monitoring the LP-SS, thereby saving power consumption. The time domain position of the SSB is the time domain position within the first resource position, and the time domain position of the LP-SS is the time domain position within the second resource position.

[0046] In combination with the second aspect, in certain implementations of the second aspect, the method further includes: determining a third resource location based on the second resource location, the number of resources separated by the time domain position in the third resource location and the time domain position in the second resource location and the number of resources occupied by the first synchronization signal in the time domain and / or the number of resources occupied by SSB in the time domain have a third preset relationship, the third resource location is the resource location where the low-power wake-up receiver receives the second synchronization signal, and the first synchronization signal and the second synchronization signal are synchronization signals of the same type with different beam directions.

[0047] As an example, the second synchronization signal may be LP-SS.

[0048] As an example, different beam directions can be understood as the antenna or antenna array sending the first synchronization signal is different from the antenna or antenna array sending the second synchronization signal; or, different beam directions can be understood as the index of the beam transmitting the first synchronization signal is different from the index of the beam transmitting the second synchronization signal; or, different beam directions can be understood as the spatial dimensions of the first synchronization signal and the second synchronization signal are different.

[0049] As an example, a network device can transmit multiple LP-SSs within a transmission cycle. Each of the multiple LP-SSs can be transmitted through a beam in a specific direction, and each of the multiple specific direction beams transmits one LP-SS. For example, the network device can transmit multiple specific direction beams at the same frequency domain position but different time domain positions. Therefore, it can be considered that the frequency domain positions of the LP-SSs transmitted by different beams are the same, and the time domain positions of the LP-SSs transmitted by different beams have a third preset relationship. In this example, the first synchronization signal can be understood as the first LP-SS transmitted by the network device, and the second synchronization signal can be understood as any LP-SS transmitted by the network device except the first LP-SS.

[0050] As an example, the third preset relationship may be predefined by a protocol or preconfigured in the terminal device in advance, which is not limited here.

[0051] In this implementation, when determining the time domain position of the first synchronization signal, the main receiver or LP-WUR of the terminal device can determine the time domain position of the second synchronization signal based on the time domain position of the first synchronization signal and the third preset relationship, thereby enabling the terminal device to determine the time domain position and frequency domain position of the second synchronization signal without monitoring the second synchronization signal, thereby saving power consumption. The time domain position of the first synchronization signal is the time domain position within the second resource position, and the time domain position of the second synchronization signal is the time domain position within the third resource position.

[0052] In a third aspect, the present application provides a communication method, which is applied to a terminal device, wherein the terminal device includes a main receiver and a low-power wake-up receiver, and the method includes: determining a third position, wherein the third position is a resource position for the low-power wake-up receiver of the terminal device to monitor a third synchronization signal; determining a fourth position for the low-power wake-up receiver of the terminal device to monitor a low-power wake-up signal based on the third position, and the time domain resource separated by the time domain position in the third position and the time domain position in the fourth position has a fourth preset relationship with the wake-up delay of the low-power wake-up receiver and / or the frequency switching duration of the low-power wake-up receiver.

[0053] As an example, the method can be executed by a terminal device, or by a chip system, hardware circuit and / or software module applied to the terminal device.

[0054] One possible implementation is that the terminal device includes a main receiver, which can implement some or all of the LP-WUR functionality. For example, the module for implementing the LP-WUR functionality can be included in the main receiver. In another example, the module included in the LP-WUR is part of a template included in the main receiver. When the terminal device is in a low-power state, the terminal device can enable the LP-WUR.

[0055] One possible implementation is: the terminal device includes a main receiver and a first receiver, the main receiver can implement some functions of LP-WUR, and the first receiver can implement some functions of LP-WUR. For example, the module for implementing the LP-WUR function may include a first partial module and a second partial module, the first partial module may be included in the main receiver, and the second partial module may be included in the first receiver. For another example, the module in LP-WUR includes a first partial module and a second partial module, the first partial module is a partial module in the module included in the main receiver, and the second partial module is a partial module in the module included in the first receiver. Among them, when the terminal device is in a low power consumption state, the terminal device can turn on LP-WUR.

[0056] As an example, the third synchronization signal may be SSB, and the LP-WUR may be capable of receiving the SSB. For example, the LP-WUR may be capable of signal processing (such as signal decoding, complex number convolution, etc.) to enable monitoring and reception of the SSB.

[0057] As an example, the LP-WUR of the terminal device can achieve downlink synchronization with the network device through SSB, or the LP-WUR of the terminal device can achieve synchronization of the LP-WUR itself through SSB, or achieve synchronization of the LP-WUR with the local clock, or achieve time deviation and / or frequency deviation of the LP-WUR to be limited to a certain range, or achieve no time deviation or frequency deviation of the LP-WUR.

[0058] As an example, the LP-WUR of the terminal device may determine a monitoring location of the LP-WUS based on the third location, and monitor the LP-WUS at the monitoring location of the LP-WUS, thereby receiving the LP-WUS. It should be understood that the monitoring location of the LP-WUS is the fourth location where the LP-WUR monitors the LP-WUS, or is the resource location where the LP-WUR monitors the LP-WUS.

[0059] In one achievable manner, the operating frequency of the SSB may be inconsistent with the operating frequency of the LP-WUS. The operating frequency may also be referred to as an operating frequency band, an operating center frequency, an operating frequency range, or a frequency domain unit. In this implementation, the time domain resource separated by the time domain position in the third position and the time domain position in the fourth position may have a fourth preset relationship with the wake-up delay of the LP-WUR and / or the frequency switching duration of the LP-WUR. The time domain resource may also be referred to as a time domain unit or a time domain range.

[0060] As an example, the LP-WUR of the terminal device can monitor the SSB at the working frequency of the SSB, and after the LP-WUR itself is synchronized through the SSB, the LP-WUR can switch the working frequency to the working frequency of the LP-WUS, thereby monitoring the LP-WUS. It should be understood that the frequency switching duration of the LP-WUR can be understood as the duration of the LP-WUR switching the working frequency. For example, the frequency switching duration of the LP-WUR can be understood as the time required for the LP-WUR to switch the working frequency from the working frequency of the SSB to the working frequency of the LP-WUS. The frequency switching duration can also be referred to as the frequency switching delay, which is not specifically limited here.

[0061] As an example, when the LP-WUR is in an on state after achieving synchronization of the LP-WUR itself through the SSB, the time domain resources between the time domain positions in the third position and the time domain positions in the fourth position may have a fourth preset relationship with the frequency switching duration of the LP-WUR. For example, the time domain resources between the time domain positions in the third position and the time domain positions in the fourth position may be greater than or equal to the frequency switching duration of the LP-WUR, or the frequency switching duration of the LP-WUR may be less than the time domain resources between the time domain positions in the third position and the time domain positions in the fourth position.

[0062] As an example, after the LP-WUR achieves synchronization of the LP-WUR itself through SSB and enters a sleep state, and remains in the sleep state for a period of time before being awakened to monitor the LP-WUS, the time domain resources spaced between the time domain position in the third position and the time domain position in the fourth position may have a fourth preset relationship with the wake-up delay of the LP-WUR and / or the frequency switching duration of the LP-WUR. For example, the time domain resources spaced between the time domain position in the third position and the time domain position in the fourth position may be greater than the wake-up delay of the LP-WUR. For another example, the time domain resources spaced between the time domain position in the third position and the time domain position in the fourth position may be greater than the sum of the wake-up delay of the LP-WUR and the frequency switching duration of the LP-WUR. It should be understood that the wake-up delay of the LP-WUR may be the duration from the LP-WUR entering the sleep state to being awakened to monitor the LP-WUS.

[0063] In one achievable manner, the operating frequency of the SSB may be consistent with the operating frequency of the LP-WUS. In this implementation, the time domain resource separated by the time domain position in the third position and the time domain position in the fourth position may have a fourth preset relationship with the wake-up delay of the LP-WUS.

[0064] As an example, after the LP-WUR synchronizes itself via SSB, it enters a sleep state and remains in the sleep state for a period of time before being awakened to monitor the LP-WUR. The time domain resource between the time domain position in the third position and the time domain position in the fourth position may have a fourth preset relationship with the wake-up delay of the LP-WUR. For example, the time domain resource between the time domain position in the third position and the time domain position in the fourth position may be greater than the wake-up delay of the LP-WUR.

[0065] In this technical solution, the LP-WUR of the terminal device can achieve synchronization of the LP-WUR itself by receiving SSB, and determine the fourth position of monitoring the LP-WUS based on the resource position of the LP-WUR monitoring SSB and the fourth preset relationship, so that the LP-WUR can achieve reception synchronization of the LP-WUS through SSB.

[0066] In a fourth aspect, the present application provides a communication device, which includes modules for implementing the method in the first aspect or any one of the implementation methods, and each module can be implemented in the form of hardware and / or software.

[0067] For example, the apparatus may include: a processing module, configured to determine a first synchronization grid; and a processing module further configured to monitor a first synchronization signal according to the first synchronization grid.

[0068] In combination with the fourth aspect, in certain implementations of the fourth aspect, the processing module is also used to determine a second position for receiving a second synchronization signal based on a first position when the first synchronization signal is monitored according to the first synchronization grid, the first position being the resource position where the low-power wake-up receiver monitors the first synchronization signal according to the first synchronization grid, the first synchronization signal and the second synchronization signal are two different types of synchronization signals, or the first synchronization signal and the second synchronization signal are synchronization signals of the same type with different beam directions.

[0069] In combination with the fourth aspect, in certain implementations of the fourth aspect, the frequency domain position in the first position is an integer multiple of the subcarrier spacing.

[0070] In combination with the fourth aspect, in certain implementations of the fourth aspect, there is a first preset relationship between the number of resources separated by the time domain position in the first position and the time domain position in the second position and the number of resources occupied by the first synchronization signal in the time domain and / or the number of resources occupied by the synchronization signal block SSB in the time domain.

[0071] In combination with the fourth aspect, in certain implementations of the fourth aspect, the processing module is also used to monitor SSB according to the second synchronization grid when the second synchronization signal is SSB. When the monitoring times are the same, there is an offset between the monitoring position determined according to the first synchronization grid and the monitoring position determined according to the second synchronization grid.

[0072] In a fifth aspect, the present application provides a communication device, which includes modules for implementing the method in the second aspect or any one of the implementation methods, and each module can be implemented in the form of hardware and / or software.

[0073] For example, the apparatus may include: a processing module configured to determine a first resource location, where the first resource location is a resource location where a main receiver of the terminal device detects a synchronization signal block (SSB); and a processing module configured to determine, based on the first resource location, a second resource location where a low-power wake-up receiver of the terminal device receives the first synchronization signal.

[0074] In combination with the fifth aspect, in certain implementations of the fifth aspect, there is a second preset relationship between the number of resources separated by the time domain position in the first resource position and the time domain position in the second resource position and the number of resources occupied by the first synchronization signal in the time domain and / or the number of resources occupied by the SSB in the time domain.

[0075] In combination with the fifth aspect, in certain implementations of the fifth aspect, the processing module is further used to determine a third resource location based on the second resource location, and there is a third preset relationship between the number of resources separated by the time domain position in the third resource location and the time domain position in the second resource location and the number of resources occupied by the first synchronization signal in the time domain and / or the number of resources occupied by SSB in the time domain. The third resource location is the resource location where the low-power wake-up receiver receives the second synchronization signal, and the first synchronization signal and the second synchronization signal are synchronization signals of the same type with different beam directions.

[0076] In a sixth aspect, the present application provides a communication device, which includes various modules for implementing the method in the third aspect or any one of the implementation methods therein, and each module can be implemented in the form of hardware and / or software.

[0077] For example, the apparatus may include: a processing module, configured to determine a third position, where the third position is a resource position at which a low-power wake-up receiver of the terminal device monitors a third synchronization signal; and a processing module, further configured to determine, based on the third position, a fourth position at which the low-power wake-up receiver of the terminal device monitors a low-power wake-up signal, wherein a time domain resource spaced between a time domain position in the third position and a time domain position in the fourth position has a fourth preset relationship with a wake-up delay of the low-power wake-up receiver and / or a frequency switching duration of the low-power wake-up receiver.

[0078] In a seventh aspect, the present application provides a communication device, comprising a processor, the processor being coupled to a memory and configured to call program code in the memory to execute the method described in the first aspect or any possible implementation thereof. Optionally, the device further comprises a memory. Optionally, the device further comprises a communication interface, the processor being coupled to the communication interface.

[0079] As an example, the apparatus may be a terminal device, or a chip system, a hardware circuit and / or a software module applied in the terminal device.

[0080] In an eighth aspect, the present application provides a communication device, comprising a processor, the processor being coupled to a memory and configured to call program code in the memory to execute the method described in the second aspect or any possible implementation thereof. Optionally, the device further comprises a memory. Optionally, the device further comprises a communication interface, the processor being coupled to the communication interface.

[0081] As an example, the apparatus may be a terminal device, or a chip system, a hardware circuit and / or a software module applied in the terminal device.

[0082] In a ninth aspect, the present application provides a communication device, comprising a processor, the processor being coupled to a memory and configured to call program code in the memory to execute the method described in the third aspect or any possible implementation thereof. Optionally, the device further comprises a memory. Optionally, the device further comprises a communication interface, the processor being coupled to the communication interface.

[0083] As an example, the apparatus may be a terminal device, or a chip system, a hardware circuit and / or a software module applied in the terminal device.

[0084] In a tenth aspect, the present application provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute the method described in the first aspect, the second aspect, the third aspect, or any possible implementation thereof.

[0085] In an eleventh aspect, the present application provides a computer-readable medium storing a program code for execution by a device, wherein the program code includes a method for executing the method described in the first aspect, the second aspect, the third aspect, or any possible implementation thereof.

[0086] For the technical effects that can be achieved by any of the above-mentioned aspects 4 to 11 and any possible design of any of them, please refer to the description of the technical effects that can be brought about by the above-mentioned aspects 1 to 3, and no further details will be given here. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] FIG1 is a schematic diagram of the architecture of a mobile communication system provided by one embodiment of the present application;

[0088] FIG2 is a schematic diagram of the workflow of a low-power wake-up receiver;

[0089] FIG3 is an exemplary diagram illustrating a communication method provided in an embodiment of the present application;

[0090] FIG4 is a schematic diagram illustrating a time domain position of a synchronization signal provided by an embodiment of the present application;

[0091] FIG5 is a schematic diagram illustrating the time domain position of a synchronization signal provided by yet another embodiment of the present application;

[0092] FIG6 is a schematic diagram illustrating the time domain position of a synchronization signal provided by another embodiment of the present application;

[0093] FIG7 is a schematic diagram illustrating the time domain position of a synchronization signal provided in yet another embodiment of the present application;

[0094] FIG8 is a schematic diagram illustrating the time domain position of a synchronization signal provided by yet another embodiment of the present application;

[0095] FIG9 is a schematic diagram illustrating the time domain position of a synchronization signal provided by another embodiment of the present application;

[0096] FIG10 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

[0097] FIG11 is a schematic structural diagram of a communication device provided in another embodiment of the present application. DETAILED DESCRIPTION

[0098] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0099] To facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. Those skilled in the art will understand that the words "first" and "second" do not limit the quantity or execution order, and the words "first" and "second" do not necessarily mean different.

[0100] It should be noted that in the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0101] In the embodiments of the present application, "at least one" refers to one or more, and "more" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0102] The technical solution provided in the present application can be applied to various communication systems, including but not limited to: narrowband Internet of Things (NB-IoT) system, global system for mobile communications (GSM), enhanced data rate for GSM evolution (EDGE), wideband code division multiple access (WCDMA), code division multiple access 2000 (CDMA2000), time division-synchronization code division multiple access (TD-SCDMA), wireless fidelity (WiFi) system, third generation (3G) mobile communication system, long term evolution (LTE), advanced long term evolution (LTE-A), LTE frequency division duplex (FDD), LTE time division duplex (TDD), fourth generation (4G) mobile communication system, fifth generation (5G) mobile communication system. The three major application scenarios of 5G (5th generation) mobile communication system and 5G new radio (NR) communication system are: enhanced mobile broadband (eMBB), ultra-reliable and low latency communications (URLLC) and massive machine type communication (mMTC), as well as the future sixth generation (6G) mobile communication system, such as high frequency, terahertz, optical communication, etc. This application does not impose specific restrictions on this.

[0103] For example, Figure 1 is a schematic diagram of the architecture of a mobile communication system provided by one embodiment of the present application. As shown in Figure 1 , the mobile communication system includes a core network device 110, a wireless access network device 120, and at least one terminal device (such as terminal device 130 and terminal device 140 in Figure 1 ). The terminal device can be connected to the wireless access network device wirelessly, and the wireless access network device can be connected to the core network device wirelessly or by wire. The core network device and the wireless access network device can be independent and distinct physical devices, or the functions of the core network device and the logical functions of the wireless access network device can be integrated into the same physical device, or a single physical device can integrate some of the functions of the core network device and some of the functions of the wireless access network device, although this application does not impose any restrictions on this. The terminal device can be fixed or mobile. It should be understood that Figure 1 is merely a schematic diagram, and the communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in Figure 1 . The embodiments of the present application do not limit the number of core network devices, wireless access network devices, and terminal devices included in the mobile communication system.

[0104] The wireless access network device can be an access device for the terminal device to access the mobile communication system in a wireless manner. The wireless access network device can be a base station (NodeB), an evolved base station (evolved NodeB, eNodeB), a base station in a 5G mobile communication system, a base station in a future mobile communication system or an access node in a WiFi system, or other communication terminals, etc. The embodiments of this application do not limit the specific technology and specific device form adopted by the wireless access network device. Among them, the device for implementing the wireless access network device can be a wireless access network device, or it can be a device that can support the wireless access network device to implement its functions, such as a chip system, which can be installed in the wireless access network device. In the embodiment of the present application, the chip system can be composed of chips, or it can include chips and other discrete devices.

[0105] Terminal equipment can also be called terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), etc. Terminal equipment can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in remote surgery, 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. The embodiments of this application do not limit the specific technology and specific device form adopted by the terminal equipment. Among them, the device for realizing the terminal equipment can be a terminal equipment, or it can be a device that can support the terminal equipment to realize its functions, such as a chip system, which can be installed in the terminal equipment.

[0106] The wireless access network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water; and can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of the wireless access network equipment and terminal equipment.

[0107] The embodiments of the present application can be applied to downlink signal transmission, uplink signal transmission, and device-to-device (D2D) signal transmission. For downlink signal transmission, the transmitting device is a wireless access network device, and the corresponding receiving device is a terminal device. For uplink signal transmission, the transmitting device is a terminal device, and the corresponding receiving device is a wireless access network device. For D2D signal transmission, the transmitting device is a terminal device, and the corresponding receiving device is also a terminal device. The embodiments of the present application do not limit the direction of signal transmission.

[0108] The wireless access network device and the terminal device, as well as the terminal device and the terminal device, can communicate through the authorized spectrum, or can communicate through the unlicensed spectrum, or can communicate through both the authorized spectrum and the unlicensed spectrum at the same time. The wireless access network device and the terminal device, as well as the terminal device and the terminal device, can communicate through the spectrum below 6G, or can communicate through the spectrum above 6G, or can communicate through the spectrum below 6G and the spectrum above 6G at the same time. The embodiments of the present application do not limit the spectrum resources used between the wireless access network device and the terminal device.

[0109] The technical problem to be solved by this application is described below with reference to FIG2 .

[0110] The 3rd Generation Partnership Project (3GPP) introduced a low power wake-up signal (LP-WUS) in Release 18 (R18) to support the low power consumption mechanism of terminal devices in R18. For example, a terminal device may include a main receiver and a low power wake-up receiver (LP-WUR). The terminal device may use the LP-WUR to monitor for the LP-WUS and, upon receiving the LP-WUS, wake up the main receiver to perform paging procedures, random access procedures, or data reception and transmission, thereby achieving energy conservation.

[0111] For example, Figure 2 is a schematic diagram of the workflow of the low-power wake-up receiver. As shown in Figure 2, the terminal device includes a main receiver and LP-WUR. The network device (such as a wireless access network device) can send NR signals, LP-WUS and other signals to the terminal device. The terminal device can use the main receiver to receive the NR signal and use LP-WUR to monitor LP-WUS. Before receiving the LP-WUS, the terminal device can set the main receiver to the off state or deep sleep state. After receiving the LP-WUS, the terminal device can wake up the main receiver to receive and transmit data (such as NR signals), paging procedures, random access procedures, etc., so as to achieve the purpose of energy saving. It should be noted that the LP-WUR is in the on state by default.

[0112] It should be noted that before the terminal device receives a downlink signal, such as before the terminal device monitors the LP-WUS through the LP-WUR, or before the terminal device receives the NR signal through the main receiver, it is necessary to achieve synchronization of the terminal device itself, thereby achieving synchronization performance of the terminal device in receiving other signals. For example, the main receiver of the terminal device can be synchronized with the network device in time and frequency through the primary synchronization signal (PSS) and secondary synchronization signal (SSS) contained in the synchronization signal / physical broadcast channel block (synchronization signal / physical broadcast channel block, synchronization signal / PBCH block, SSB), or the main receiver of the terminal device can achieve synchronization of the main receiver itself through SSB, or achieve synchronization of the main receiver with the local clock, or achieve time deviation and / or frequency deviation of the main receiver limited to a certain range, or achieve no time deviation or frequency deviation of the main receiver.

[0113] However, in some usage scenarios, due to the low power and simple design of LP-WUR, LP-WUR may not have the ability to process signals (such as signal decoding, complex number convolution, etc.), and may not be able to receive SSB, thereby failing to achieve synchronization of LP-WUR itself, and further failing to achieve reception synchronization of LP-WUS. Therefore, relevant technical personnel proposed to design a low power synchronous signal (LP-SS) for LP-WUR, so that the LP-WUR of the terminal device can achieve the synchronization performance of LP-WUR receiving other signals (such as LP-WUS) through LP-SS, or enable LP-WUR to achieve reception synchronization of other signals (such as LP-WUS) through LP-SS. As an example, LP-SS can be a low power synchronization signal based on on-off keying (OOK), or a low power synchronization signal based on frequency shift keying (FSK), or a low power synchronization signal based on orthogonal frequency-division multiplexing (OFDM), or a low power synchronization signal based on the fusion of the above different modulation methods. Fusion schemes include, for example, the fusion of OOK and OFDM, or the fusion of FSK and OFDM, which are not limited here. Among them, OOK modulation can be understood as part of the time domain resources sending signals, and part of the time domain resources not sending signals. The fusion scheme of OOK and OFDM can be understood as using OOK modulation to carry part of the information, and using OFDM for modulation on the time domain resources where OOK has signals. One feasible solution is to use different sequences to distinguish different terminals in the part where OOK has signals, such as using Zadoff-Chu (ZC) sequences. This can increase the data rate of signal transmission and improve the detection performance of the signal. In some embodiments, the network device can periodically send LP-SS. In some embodiments, the LP-SS sent by the network device can be at the cell level, that is, all UEs in a cell can receive the same synchronization signal. It should be understood that LP-SS is only an example and not a limitation. For example, as long as the LP-WUR can achieve synchronization of the LP-WUR itself by receiving a certain signal, the signal can be considered as LP-SS. LP-SS can also be called other names, which are not limited here.

[0114] However, after the introduction of LP-SS, how to determine the time domain position and frequency domain position of LP-SS to achieve LP-SS reception has become an urgent problem that needs to be solved.

[0115] In other usage scenarios, LP-WUR can receive SSB, that is, LP-WUR can synchronize itself with LP-WUR through SSB, but cannot synchronize the reception of LP-WUS. For example, when the working frequency of SSB is inconsistent with the working frequency of LP-WUS, after LP-WUR synchronizes itself through SSB, it needs to switch the working frequency to the working frequency of LP-WUS before it can monitor LP-WUS and achieve synchronization of reception of LP-WUS. At this time, if the time domain resource interval between the monitoring position of SSB and the monitoring position of LP-WUS is less than the frequency switching time of LP-WUR, LP-WUR will not be able to achieve synchronization of reception of LP-WUS. For example, after LP-WUR synchronizes itself through SSB and enters sleep state, LP-WUR needs to be awakened to monitor LP-WUS. At this time, if the time domain resource between the monitoring position of SSB and the monitoring position of LP-WUS is less than the wake-up delay of LP-WUR, LP-WUR will not be able to achieve LP-WUS reception synchronization. Among them, the frequency switching time of LP-WUR can be understood as the time required for LP-WUR to switch the operating frequency from the operating frequency of SSB to the operating frequency of LP-WUS; the wake-up delay of LP-WUR can be the time from the LP-WUR entering the sleep state to being awakened to monitor LP-WUS.

[0116] In response to the above technical problems, the present application provides a communication method and a communication device. In the technical solution provided by the present application, a synchronization raster for searching the LP-SS working frequency can be designed to determine the frequency domain position of the LP-SS, and the time domain position of the LP-SS is determined by predefining the association between the time domain position of the SSB and the time domain position of the LP-SS under the same beam index (index), thereby realizing the reception of the LP-SS, realizing the synchronization of the LP-WUR itself, and then realizing the synchronization performance of the LP-WUR receiving other signals (such as LP-WUS). In the technical solution provided by the present application, the relationship between the time domain resources between the monitoring position of the SSB and the monitoring position of the LP-WUS and the frequency switching duration of the LP-WUR and / or the wake-up delay of the LP-WUR can be limited, so that the LP-WUR can achieve reception synchronization of the LP-WUS through the SSB.

[0117] The technical solution provided in this application can be applied to power-sensitive devices and small devices, such as IoT usage scenarios (such as industrial sensors and controllers), wearable devices, extended reality (XR) / smart glasses, smartphones or other application scenarios, and this application does not impose specific restrictions on this.

[0118] To facilitate understanding of the technical solution provided in this application, the method for the main receiver of the terminal device to determine the time domain position and frequency domain position of the SSB is first explained.

[0119] As an example, a network device (such as a wireless access network device) may periodically send an SSB so that the terminal device can ensure the synchronization performance of receiving other signals or channels at any point in time. For example, the main receiver of the terminal device may monitor and receive the SSB at a fixed known SSB transmission time according to its own needs to ensure the synchronization performance of receiving other signals or channels. For example, when the main receiver of the terminal device performs a cell search, it may monitor the SSB according to the operator and the operating frequency band supported by the terminal device to perform time-frequency synchronization. In the 5G NR communication system, in order to reduce the synchronization time of the terminal device, the concept of a synchronization grid is introduced so that the main receiver of the terminal device can monitor the SSB based on the synchronization grid. The synchronization grid can indicate the frequency domain position SS of the SSB. REF , SS REF One-to-one correspondence with the global synchronization channel number (GSCN), each GSCN corresponds to the frequency domain position of an SSB. REF It may also be referred to as the center frequency, monitoring position or monitoring frequency point of SSB. As an example, Table 1 shows a synchronization grid for monitoring SSB.

[0120] Table 1: GSCN parameters for the global frequency raster

[0121] Therefore, the terminal device can calculate the GSCN based on Table 1 to determine the SSB monitoring location, thereby achieving SSB reception. For example, when GSCN = 2, it can be deduced that N = 1 and M = 1, thus determining that the SSB monitoring location is 1250 kHz. The terminal device can monitor for the presence of the SSB at each of the determined monitoring locations, thereby achieving SSB reception. The value multiplied by N and M is called the search step size or search granularity. For example, the search step size in the range of 24250–100000 MHz is 17.28 MHz.

[0122] In some embodiments, the network device may transmit multiple SSBs, and each of the multiple SSBs may be transmitted via a beam in a specific direction. Multiple SSBs may be located within the same transmission cycle. The transmission timing / time domain position of SSBs transmitted by different beams has a fixed pattern. Depending on the subcarrier spacing (SCS), there are five different time domain positions of SSBs transmitted by different beams, as shown in Table 2 below. It should be understood that the time domain position relationship of SSBs transmitted by different beams can be determined by Table 2.

[0123] Table 2: Start symbols for each subcarrier spacing and frequency

[0124] It should be noted that the five types in Table 2 are all for one transmission cycle. The transmission cycle is, for example, half a frame. The starting symbol index of the SSB can be understood as the index of the first symbol of the four symbols occupied by the SSB in the time domain. The symbol can be an orthogonal frequency division multiplexing (OFDM) symbol. L indicates the number of SSBs that can be transmitted in a half frame, or the number of beams transmitting SSBs in a half frame, and f indicates the operating frequency band of the communication system, or the frequency domain range of the communication system, or the operating frequency point of the communication system. Among them, half a frame can be understood as half of a radio frame, the radio frame length is defined as 10 milliseconds (ms), and the length of a half frame is 5ms. A radio frame contains 10 subframes, and the length of each subframe is 1ms. A subframe can be further divided into multiple time slots, and the number of time slots is related to the subcarrier spacing. For example, when the subcarrier spacing is 15kHz, one subframe is equal to one time slot; when the subcarrier spacing is 30kHz, one subframe is equal to two time slots. One time slot may contain 14 OFDM symbols.

[0125] In case A, the subcarrier spacing is 15 kHz, and the SSB starting symbol index is {2, 8} + 14*n. When f <= 3 GHz, n = 0, 1. When n = 0, the SSB starting symbol index is {2, 8}; when n = 1, the SSB starting symbol index is {16, 22}. As can be seen, the SSB occupies 2 time slots, with 2 SSBs in 1 time slot, so L = 4. When 3 <= f <= 6 GHz, n = 0, 1, 2, 3. When n = 0, the SSB starting symbol index is {2, 8}; when n = 1, the SSB starting symbol index is {16, 22}; when n = 2, the SSB starting symbol index is {30, 36}; and when n = 3, the SSB starting symbol index is {44, 50}. As can be seen, the SSB occupies 4 time slots, with 2 SSBs in 1 time slot, so L = 8.

[0126] In case B, the subcarrier spacing is 30 kHz, and the SSB starting symbol index is {4, 8, 16, 20} + 28*n. When f <= 3 GHz, n = 0. When n = 0, the SSB starting symbol index is {4, 8, 16, 20}. It can be seen that SSB occupies a total of 2 time slots, and each time slot contains 2 SSBs, so L = 4. When 3 <= f <= 6 GHz, n = 0, 1. It can be determined that SSB occupies a total of 4 time slots, and each time slot contains 2 SSBs, so L = 8.

[0127] In case C, the subcarrier spacing is 15 kHz, and the SSB starting symbol index is {2,8}+14*n. When f <= 3 GHz, n = 0, 1. It can be determined that SSB occupies a total of 2 time slots, with 1 time slot containing 2 SSBs, so L = 4. When 3 <= f <= 6 GHz, n = 0, 1, 2, 3. It can be determined that SSB occupies a total of 4 time slots, with 1 time slot containing 2 SSBs, so L = 8.

[0128] In case D, the subcarrier spacing is 120 kHz, and the starting symbol index of the SSB is {4, 8, 16, 20} + 28*n. When f > 6 GHz, n = 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18. A subframe contains 8 time slots, and a time slot contains 2 SSBs. Therefore, a subframe contains 16 SSBs, a total of 4 groups, and L = 64.

[0129] In case E, the subcarrier spacing is 240 kHz, and the SSB starting symbol index is {8, 12, 16, 20, 32, 36, 40, 44} + 56*n. When f > 6 GHz, n = 0, 1, 2, 3, 5, 6, 7, 8. A subframe contains 16 time slots, and a time slot contains two SSBs. Therefore, a subframe contains 32 SSBs, a total of two groups, and L = 64.

[0130] Based on this, when the network device sends multiple SSBs, the main receiver of the terminal device can monitor the first SSB, and after monitoring the first SSB, determine the time domain positions of other SSBs based on the time domain position of the first SSB and the time domain position relationship of SSBs transmitted by different beams in Table 2. For example, in case A, when f<=3GHz, the starting symbol index of the SSB is {2,8}+14*n. If the starting symbol index of the first SSB is 2, the starting symbol index of the second SSB is 8, the starting symbol index of the third SSB is 16, and the starting symbol index of the fourth SSB is 22. It should be noted that the time domain position of the first SSB can be the moment when the main receiver of the terminal device monitors the SSB.

[0131] The technical solution provided by the embodiment of the present application is described below in conjunction with Figures 3 to 9. This technical solution can be applied to scenarios where the LP-WUR cannot synchronize itself via SSB, and thus cannot synchronize the reception of the LP-WUS.

[0132] For example, Figure 3 is an exemplary diagram illustrating a communication method provided in an embodiment of the present application. As shown in Figure 3, the method may include S301 and S302.

[0133] As an example, the method may be executed by a terminal device, or may be executed by a chip system, a hardware circuit and / or a software module applied to the terminal device. The terminal device may include a main receiver and an LP-WUR.

[0134] One possible implementation is that the terminal device includes a main receiver, which can implement some or all of the LP-WUR functionality. For example, the module for implementing the LP-WUR functionality can be included in the main receiver. In another example, the module included in the LP-WUR is part of a template included in the main receiver. When the terminal device is in a low-power state, the terminal device can enable the LP-WUR.

[0135] One possible implementation is: the terminal device includes a main receiver and a first receiver, the main receiver can implement some functions of LP-WUR, and the first receiver can implement some functions of LP-WUR. For example, the module for implementing the LP-WUR function may include a first partial module and a second partial module, the first partial module may be included in the main receiver, and the second partial module may be included in the first receiver. For another example, the module in LP-WUR includes a first partial module and a second partial module, the first partial module is a partial module in the module included in the main receiver, and the second partial module is a partial module in the module included in the first receiver. Among them, when the terminal device is in a low power consumption state, the terminal device can turn on LP-WUR.

[0136] S301: Determine a first synchronization grid.

[0137] As an example, the first synchronization grid can be understood as the synchronization grid used when the LP-WUR of the terminal device receives the LP-SS, or the LP-WUR of the terminal device can determine the frequency domain position SS of the LP-SS based on the first synchronization grid. LP-REF SS LP-REF It can also be called the center frequency, monitoring position or monitoring frequency point of LP-SS.

[0138] As an example, SS LP-REF It can correspond one-to-one with GSCN, and each GSCN corresponds to the frequency domain position of an LP-SS.

[0139] As an example, the first synchronization grid may be predefined.

[0140] In one possible implementation, the first synchronization grid may be associated with a second synchronization grid. The second synchronization grid is the synchronization grid used by the main receiver of the terminal device when receiving the SSB, or the main receiver of the terminal device may determine the frequency domain position SS of the SSB based on the second synchronization grid. REF .

[0141] In this implementation, to avoid SSB monitoring position SS REF Monitoring position SS with LP-SS LP-REF A collision or collision can cause SS REF With SS LP-REF There is an offset between them. It should be noted that if the monitoring position SS of LP-SS LP-REF To avoid the LP-SS monitoring position SS LP-REF To reduce the number of LP-WUR monitoring terminals, the frequency domain range of the LP-SS can be offset accordingly. For example, the frequency domain range offset can be the same as the SS REF With SSLP-REF The offset between them is the same. The offset can be predefined, or set according to actual needs, or configured through signals, such as through system information block (SIB) or SIB1 indication, which is not specifically limited in this application.

[0142] As an example, Table 3 is an example of the first synchronization grid. Based on Table 3, the GSCN in different frequency domains and the SS corresponding to the GSCN can be determined. LP-REF It should be understood that Table 3 is only an example and not a limitation.

[0143] Table 3: Parameters of the GSCN of the first synchronization grid

[0144] In some embodiments, 0-(3000+offset) MHz in Table 3 may also be replaced by (0+offset)-(3000+offset) MHz, that is, offset-(3000+offset) MHz.

[0145] It should be understood that offset can be understood as the offset between the frequency domain position of the SSB determined according to the first synchronization grid and the frequency domain position of the LP-SS determined according to the second synchronization grid when the monitoring times are the same. The same monitoring times can be understood as the same GSCN, or the same values ​​of M and N.

[0146] In another possible implementation, the first synchronization grid may be a newly designed synchronization grid.

[0147] As an example, different search step sizes can be designed for different frequency domain ranges based on the working frequency band or frequency domain range supported by LP-WUS. For example, a smaller search step size can be used within the frequency domain range supported by LP-WUS, and a larger search step size can be used in other frequency domain ranges. Among them, the frequency domain range supported by LP-WUS can be understood as the frequency domain range in which the probability that the LP-WUR of the terminal device can monitor LP-SS is greater than or equal to the probability threshold, and other frequency domain ranges can be understood as the frequency domain range in which the probability that the LP-WUR of the terminal device can monitor LP-SS is less than the probability threshold. The probability threshold can be set according to actual needs and is not limited here. For example, most operators support working frequency bands of 900MHz and 1.8GHz. In order to further reduce network overhead, LP-WUS may also support working frequency bands of 900MHz and / or 1.8GHz. It should be noted that the LP-WUR of the terminal device monitors LP-SS within the frequency domain range, which can also be referred to as the LP-WUR of the terminal device searching for LP-SS within the frequency domain range. Therefore, the first synchronization grid can be understood as a search rule for the LP-WUR of the terminal device to search for the LP-SS in the frequency domain.

[0148] As an example, Table 4 is another example of the first synchronization grid. Based on Table 4, the GSCN in different frequency domains and the SS corresponding to the GSCN can be determined. LP-REF It should be understood that Table 4 is only an example and not a limitation.

[0149] Table 4: Parameters of the GSCN of the first synchronization grid

[0150] Table 4 takes the frequency range from 0 to 3500 MHz as an example, dividing the frequency range from 0 to 3500 MHz into four frequency domain ranges, namely 0–500 MHz, 500–1000 MHz, 1000–2500 MHz, and 2500–3500 MHz. Floor() can be understood as rounding down. In some embodiments, when calculating GSCN, rounding up or rounding up can also be used, which is not specifically limited here. The value multiplied by N and M can be called the search step size or search granularity.

[0151] As can be seen in Table 4, different search step sizes are used for different frequency domain ranges. For example, in the 0–500 MHz range, the minimum search step size is 1000 kHz; in the 500–1000 MHz range, the minimum search step size is 500 kHz; in the 1000–2500 MHz range, the minimum search step size is 1000 kHz; and in the 2500–3500 MHz range, the minimum search step size is 500 kHz. It can be seen that the 900 MHz operating frequency band that LP-WUS may support is included in the 500–1000 MHz range. Compared to the 0–500 MHz frequency domain range, which does not include 900 MHz, the minimum search step size in the 500–1000 MHz range is smaller than that in the 0–500 MHz range. As can be seen in Table 4, the search step size corresponding to N is smaller than the search step size corresponding to M, so the search step size corresponding to N can be considered the minimum search step size. The search step size corresponding to N can be understood as the value multiplied by N.

[0152] Table 4 also shows that the search step size increases with frequency range, allowing the terminal device to quickly search for the LP-SS and shorten synchronization time. For example, the search step size in the 500–1000 MHz range is smaller than that in the 1000–2500 MHz range.

[0153] In some embodiments, since the range of 1000-2500 MHz includes the operating frequency band of 1.8 GHz that may be supported by LP-WUS, a smaller search step size may also be used in the range of 1000-2500 MHz, for example, the search step size corresponding to N may be 500 kHz.

[0154] S302: A low-power wake-up receiver of a terminal device monitors a first synchronization signal according to a first synchronization grid.

[0155] In this embodiment, the LP-WUR of the terminal device can determine the GSCN based on the first synchronization grid shown in Table 3 or Table 4, traverse the values ​​of N and M in different frequency domains, and determine the SS corresponding to the GSCN. LP-REF ; In the determined SS LP-REF Whether an LP-SS is detected at the first position, if the LP-SS is detected at the first position, the frequency domain position in the first position can be considered as the frequency domain position of the LP-SS, and the time domain position in the first position can be considered as the time domain position of the LP-SS. The frequency domain position in the first position can be referred to as the first frequency domain position, and the time domain position in the first position can be referred to as the first time domain position.

[0156] Taking Table 3 as an example, when the frequency domain range is 0-(3000+offset)MHz, if N=1, M=1, GSCN=2, SS LP-REF=(1250+offset)kHz; when N=1, M=3, GSCN=3, SS LP-REF =(1350+offset)kHz; when N=1, M=5, GSCN=4, SS LP-REF =(1450+offset)kHz. It should be understood that SS LP-REF The number of LP-WUR of the terminal equipment is 26638. LP-REF Later, you can follow the SS LP-REF For example, the LP-WUR of the terminal device can monitor whether LP-SS exists at (1250+offset)kHz, (1350+offset)kHz, and (1450+offset)kHz in sequence. If the LP-WUR detects LP-SS at (1350+offset)kHz, the frequency domain position of the LP-SS can be determined to be (1350+offset)kHz, and the time domain position of the LP-SS is the moment when the LP-SS is detected.

[0157] In some embodiments, the LP-WUR of a terminal device may stop monitoring LP-SS after detecting LP-SS. For example, if the LP-WUR of a terminal device detects LP-SS at (1350+offset) kHz, it does not need to continue monitoring LP-SS at (1450+offset) kHz to save power.

[0158] It should be understood that the manner in which the LP-WUR of the terminal device determines the time-frequency position of the LP-SS based on the first synchronization grid shown in Table 4 is similar to the manner in which the time-frequency position of the LP-SS is determined based on the first synchronization grid shown in Table 3, and will not be repeated here.

[0159] In some embodiments, the frequency domain position SS of the LP-SS in Table 3 or Table 4 is LP-REF It can be predefined by the protocol or preconfigured in the terminal device in advance, so that the LP-WUR of the terminal device does not need to calculate the SS LP-REF , and directly in the predefined or preconfigured SS LP-REF Monitor LP-SS and save power consumption.

[0160] In this embodiment, when LP-WUR is started to monitor LP-WUS, or the main receiver of the terminal device activates LP-WUR to monitor LP-WUS, but LP-WUR cannot achieve downlink synchronization with the network device by receiving SSB, in the scenario where LP-WUR needs to receive LP-SS for synchronization and measurement, the method of this embodiment can be used to determine the frequency domain position SS of LP-SS based on the first synchronization grid. LP-REF , in the determined SS LP-REF The LP-SS is monitored on the main receiver to determine the time or frequency domain position of the LP-SS, thereby achieving LP-SS reception, thereby achieving synchronization of the LP-WUR itself, and further achieving synchronization performance of the LP-WUR receiving other signals (such as LP-WUS). The operating frequency of the main receiver and the LP-WUR can be inconsistent.

[0161] In some embodiments, after the LP-SS is detected at the first position, it may be further verified whether the first frequency domain position is the frequency domain position of the LP-SS to improve the accuracy of determining the time domain position and frequency domain position of the LP-SS.

[0162] As an example, if the first frequency domain position is an integer multiple of the subcarrier spacing, or in other words, the first frequency domain position is an integer multiple of the subcarrier spacing, then the first frequency domain position can be considered as the frequency domain position of LP-SS. If the first frequency domain position is not an integer multiple of the subcarrier spacing, or in other words, the first frequency domain position is not an integer multiple of the subcarrier spacing, then the first frequency domain position can be considered not to be the frequency domain position of LP-SS, and the LP-WUR of the terminal device still needs to monitor LP-SS at the next frequency domain position. For example, if the subcarrier spacing is 15kHz and the first frequency domain position is 2115850kHz or 2115650kHz, since 2115850kHz or 2115650kHz is not an integer multiple of 15kHz, the frequency domain position is not the frequency domain position of LP-SS. If the first frequency domain position is 2115750kHz, since 2115750kHz is an integer multiple of 15kHz, the frequency domain position can be the frequency domain position of LP-SS.

[0163] In some embodiments, the first frequency domain position is an integer multiple of the subcarrier spacing. This can also be understood as starting from the preset frequency domain position, and the frequency domain offset value of the first frequency domain position relative to the preset frequency domain position is an integer multiple of the subcarrier spacing. Optionally, the preset frequency domain position can also be referred to as a preset frequency point position. The preset frequency domain position can be set according to actual needs and is not specifically limited in this application.

[0164] As an example, the preset frequency domain position may be an initial frequency domain position. It should be noted that, from the perspective of the system bandwidth of the communication system, the communication bandwidth of the entire communication system has an initial frequency domain position for the frequency domain resource. As an example, the preset frequency domain position may be a frequency domain position that has a preset offset from the initial frequency domain position. The preset offset may be set based on actual needs and is not specifically limited in this application.

[0165] In some embodiments, the operating frequency band of a terminal device is related to the frequency domain location of an LP-SS. For example, the operating frequency band of a terminal device can be determined by monitoring the monitoring location of the LP-SS. In another example, the operating frequency band of a terminal device can be the frequency domain location of an LP-SS. The operating frequency band of a terminal device can be the operating frequency band of an LP-WUR. The operating frequency band can also be referred to as an operating frequency point, an operating center frequency point, an operating frequency range, a frequency domain unit, or a center frequency point.

[0166] In one possible implementation, a network device may transmit multiple LP-SSs, each of which may be transmitted via a beam in a specific direction. For example, the network device may transmit multiple beams in specific directions at the same frequency domain location but different time domain locations, with each of the multiple beams in specific directions transmitting a single LP-SS. Therefore, it can be considered that the frequency domain locations of the LP-SSs transmitted by different beams are the same, and the time domain locations of the LP-SSs transmitted by different beams satisfy a first preset relationship.

[0167] As an example, multiple patterns or pattern formats may be set for the time domain positions of LP-SSs transmitted in different beams. For example, multiple patterns or pattern formats may be set for the time domain positions of LP-SSs transmitted in different beams for different subcarrier spacings and / or frequency domain ranges.

[0168] As an example, each mode or mode type set for the time domain position of LP-SSs transmitted in different beams may be for a transmission period. For example, multiple LP-SSs may be located in the same transmission period, which may be half a frame.

[0169] As an example, in each mode or mode type, the number of resources spaced between the time domain positions of LP-SSs transmitted in different beams may have a first preset relationship with the number of resources occupied by the LP-SS in the time domain and / or the number of resources occupied by the SSB in the time domain. For example, assuming that the number of resources spaced between the time domain positions of LP-SSs transmitted in different beams is F, the number of resources occupied by the LP-SS in the time domain is A, and the number of resources occupied by the SSB in the time domain is B, then F may be an integer multiple of A, or F may be an integer multiple of B, or F may be an integer multiple of the difference between A and B, or F may be an integer multiple of the sum of A and B, or F may be the sum of an integer multiple of A and B, or F may be the sum of an integer multiple of B and A, and no specific limitation is given herein. As an example, the number of resources spaced between the time domain positions of LP-SSs transmitted in different beams may be the number of resources spaced between the starting symbol indices of the LP-SSs transmitted in different beams. The starting symbol index of the LP-SS may be understood as the index of the first symbol among the symbols occupied by the LP-SS in the time domain.

[0170] As an example, the resource may be a time domain resource or a time domain unit, such as a system frame, a subframe, a second, a millisecond, a time slot, a symbol, a mini-time slot, etc., which are not limited here.

[0171] As an example, the number of resources occupied by the LP-SS in the time domain may be related to the modulation mode of the LP-SS.

[0172] As an example, the number of symbols occupied by the LP-SS in the time domain may be a positive integer, such as 1, 2, 4, 6, or 8, which is not specifically limited here.

[0173] As an example, the first preset relationship may be related to the subcarrier spacing and / or the operating frequency band of the terminal device.

[0174] As an example, the first preset relationship can be predefined by a protocol or preconfigured in the terminal device in advance, which is not limited here. For example, the first preset relationship can be preconfigured in the LP-WUR, main receiver or other storage device of the terminal device, which is not limited here.

[0175] As an example, the time domain positions of the LP-SSs transmitted by different beams may be continuous or discrete, which is not specifically limited here.

[0176] As an example, the same or different number of beams may be set for each mode or mode type. The number of beams may be understood as the number of LP-SSs that can be transmitted in one transmission cycle or the number of beams that transmit LP-SSs.

[0177] As an example, the pattern or pattern type set for the time domain position of the LP-SSs transmitted in different beams may be related to the pattern of the time domain position of the SSBs transmitted in different beams shown in Table 2. For example, the number of LP-SSs that can be transmitted in one transmission cycle may be consistent with the number of SSBs that can be transmitted in one transmission cycle shown in Table 2. In Table 2, L indicates the number of SSBs that can be transmitted in one transmission cycle.

[0178] In this implementation, when the network device transmits multiple LP-SSs, the terminal device can determine the time-frequency position of the first LP-SS based on the method in FIG3 , and determine the time-frequency positions of the other LP-SSs based on the position of the first LP-SS and a first preset relationship. The time-frequency position can be understood as an abbreviation for the time domain position and the frequency domain position.

[0179] In some implementations, the operating frequency of the main receiver of the terminal device and the LP-WUR can be consistent, so that the frequency domain position of the SSB sent by the network device is the same as the frequency domain position of the LP-SS.

[0180] In this implementation, the network device can transmit multiple LP-SSs or multiple SSBs. The beam used by the network device when transmitting multiple LP-SSs can be the same as the beam used when transmitting multiple SSBs. Therefore, it can be predefined that the time domain position of the LP-SS transmitted via a beam with the same index and the time domain position of the SSB satisfy a second preset relationship, so that the terminal device can determine the time-frequency position of the SSB transmitted via a beam with the same index based on the time-frequency position of the LP-SS, or determine the time-frequency position of the LP-SS transmitted via a beam with the same index based on the time-frequency position of the SSB. The second preset relationship between the time domain position of the LP-SS transmitted via a beam with the same index and the time domain position of the SSB can be understood as when the LP-SS and SSB are transmitted at different time domain positions via a beam with the same index, the time domain position of the LP-SS and the time domain position of the SSB satisfy the second preset relationship. For example, when the LP-SS and SSB are transmitted at different time domain positions via a beam with an index of 1, the time domain position of the LP-SS and the time domain position of the SSB satisfy the second preset relationship. In some embodiments, the beam index may be replaced by the beam direction. For example, when an LP-SS and an SSB are transmitted at different time-domain positions via a beam in a first direction, the time-domain position of the LP-SS and the time-domain position of the SSB satisfy a second preset relationship. The time-domain position of the LP-SS and the time-domain position of the SSB transmitted via a beam with the same index satisfying the second preset relationship may also be referred to as the time-domain position of the LP-SS and the time-domain position of the SSB transmitted with the same beam index satisfying the second preset relationship.

[0181] As an example, the time domain position of the LP-SS and the time domain position of the SSB transmitted with the same beam index satisfy a second preset relationship. It can be understood that the number of resources separated by the time domain position of the LP-SS and the time domain position of the SSB transmitted with the same beam index can have a second preset relationship with the number of resources occupied by the LP-SS in the time domain and / or the number of resources occupied by the SSB in the time domain. For example, if the number of resources separated by the time domain position of the LP-SS and the time domain position of the SSB transmitted with the same beam index is G, the number of resources occupied by the LP-SS in the time domain is A, and the number of resources occupied by the SSB in the time domain is B, then G can be an integer multiple of A, or G can be an integer multiple of B, or G can be an integer multiple of the difference between A and B, or G can be an integer multiple of the sum of A and B, or G can be the sum of an integer multiple of A and B, or G can be the sum of an integer multiple of B and A, and no specific limitation is made here. As an example, the number of resources spaced between the time domain position of the LP-SS and the time domain position of the SSB transmitted with the same beam index may be the number of resources spaced between the starting symbol index of the LP-SS and the starting symbol index of the SSB transmitted with the same beam index.

[0182] It should be understood that the number of resources spaced between the time domain position of the LP-SS and the time domain position of the SSB transmitted with the same beam index may have a second preset relationship with the number of resources occupied by the LP-SS in the time domain and / or the number of resources occupied by the SSB in the time domain, which may also be referred to as the number of resources spaced between the time domain position of the SSB and the time domain position of the LP-SS transmitted with the same beam index may have a second preset relationship with the number of resources occupied by the LP-SS in the time domain and / or the number of resources occupied by the SSB in the time domain. The number of resources spaced between the time domain position of the SSB and the time domain position of the LP-SS transmitted with the same beam index may be the number of resources spaced between the start symbol index of the SSB and the start symbol index of the LP-SS transmitted with the same beam index.

[0183] As an example, the second preset relationship can be predefined by a protocol or preconfigured in the terminal device in advance, which is not limited here. For example, the second preset relationship can be preconfigured in the LP-WUR, main receiver or other storage device of the terminal device, which is not limited here.

[0184] Therefore, when the network device sends multiple LP-SSs, the LP-WUR of the terminal device can determine the time-frequency position of the first LP-SS based on the method in Figure 3, and determine the time-frequency position of the first SSB based on the time-frequency position of the first LP-SS, and send the determined time-frequency position of the first SSB to the main receiver. After receiving the time-frequency position of the first SSB, the main receiver can determine the time-frequency positions of other SSBs based on the time-frequency position of the first SSB, so that the main receiver can determine the time-frequency position of the SSB without monitoring the SSB, thereby saving power consumption. Alternatively, after the LP-WUR of the terminal device determines the time-frequency position of the first LP-SS based on the method in Figure 3, it sends the time-frequency position of the first LP-SS to the main receiver. After receiving the time-frequency position of the first LP-SS, the main receiver can determine the time-frequency position of the first SSB based on the time-frequency position of the first LP-SS, and then determine the time-frequency positions of other SSBs, thereby allowing the main receiver to determine the time-frequency position of the SSB without monitoring the SSB, thereby saving power consumption. It should be noted that the beam index for transmitting the first SSB and the beam index for transmitting the first LP-SS can be considered to be the same.

[0185] Accordingly, after the main receiver determines the time-frequency position of the first SSB, it can determine the time-frequency position of the first LP-SS based on the time-frequency position of the first SSB, and send the determined time-frequency position of the first LP-SS to the LP-WUR. After receiving the time-frequency position of the first LP-SS, the LP-WUR can determine the time-frequency positions of other LP-SSs based on the time-frequency position of the first LP-SS, so that the LP-WUR can determine the time-frequency position of the LP-SS without monitoring the LP-SS, thereby saving power consumption. Alternatively, after determining the time-frequency position of the first SSB, the main receiver can send the time-frequency position of the first SSB to the LP-WUR. After receiving the time-frequency position of the first SSB, the LP-WUR can determine the time-frequency position of the first LP-SS based on the time-frequency position of the first SSB, and then determine the time-frequency positions of other LP-SSs, thereby allowing the LP-WUR to determine the time-frequency position of the LP-SS without monitoring the LP-SS, thereby saving power consumption.

[0186] In some embodiments, after the main receiver determines the time-frequency position of the first LP-SS based on the time-frequency position of the first SSB and the second preset relationship, it can determine the time-frequency positions of other LP-SSs based on the time-frequency position of the first LP-SS and the first preset relationship, and send the time-frequency positions of all LP-SSs to the LP-WUR to reduce the power consumption of the LP-WUR.

[0187] Accordingly, after the LP-WUR determines the time-frequency position of the first SSB based on the time-frequency position of the first LP-SS and the second preset relationship, it can determine the time-frequency positions of other SSBs based on the time-frequency position of the first SSB and the third preset relationship, and send the time-frequency positions of all SSBs to the main receiver. The third preset relationship can be understood as the time domain position relationship of SSBs transmitted by different beams shown in Table 2.

[0188] In some embodiments, the main receiver of the terminal device can determine the time-frequency positions of other SSBs based on the time-frequency position of the first SSB and the third preset relationship, and send the time-frequency positions of all SSBs to the LP-WUR, so that the LP-WUR can determine the time-frequency position of the LP-SS transmitted with the same beam index based on the time-frequency position of each SSB and the second preset relationship, and then determine the time domain position of all LP-SSs.

[0189] Correspondingly, after determining the time-frequency position of the first LP-SS, LP-WUR can determine the time-frequency positions of other LP-SSs based on the time-frequency position of the first LP-SS and the first preset relationship, and send the time-frequency positions of all LP-SSs to the main receiver, so that the main receiver can determine the time-frequency position of the SSB transmitted with the same beam index based on the time domain position of each LP-SS and the second preset relationship, and then determine the time-frequency positions of all SSBs.

[0190] In an embodiment of the present application, the main receiver may be started first, and then the LP-WUR may be started. The main receiver may send the time-frequency position of the SSB and / or the time-frequency position of the LP-SS to the LP-WUR, so that the LP-WUR may determine the time-frequency position of the LP-SS. Alternatively, the LP-WUR may be started first, and then the main receiver may be started. The LP-WUR may send the time-frequency position of the LP-SS and / or the time-frequency position of the SSB to the main receiver, so that the main receiver may determine the time-frequency position of the SSB. In an embodiment of the present application.

[0191] In one possible implementation, LP-SS and SSB can share the same time domain resources, or LP-SS can be transmitted on the time domain resources configured for SSB. For example, when the SSB pattern format is case A, the time domain resources configured for SSB include 70 symbols with indices from 0 to 69. However, SSB can occupy a maximum of 32 of these 70 symbols, so LP-SS can be transmitted in the remaining 38 symbols. Therefore, the time domain locations of LP-SS transmitted in different beams can be located within these 38 symbols.

[0192] As an example, the starting symbol index of the LP-SS can be related to the starting symbol index of the SSB transmitted with the same beam index. The starting symbol index of the LP-SS is exemplarily described below in conjunction with Figures 4 to 9. As an example, in Figures 4 to 9, it is assumed that the network device transmits LP-SS and SSB via beams in four specific directions within a transmission cycle. The time domain positions of the SSB transmitted by the beams in the four specific directions are shown as the black shaded blocks in Figures 4 to 9, and the time domain positions of the LP-SS transmitted by the beams in the four specific directions are shown as the diagonal shaded blocks in Figures 4 to 9.

[0193] As an example, in FIG4 to FIG7 , the LP-SS occupies 2 symbols in the time domain.

[0194] Figure 4 is a schematic diagram illustrating the time domain position of a synchronization signal provided by an embodiment of the present application. In Figure 4 , the SSB pattern format is case B, and f<=3 GHz.

[0195] As shown in Figure 4, the starting symbol index of the SSB is: {4, 8, 16, 20} + 28*n, where n = 0. The starting symbol index of the LP-SS transmitted with the same beam index can be {2, 12, 14, 24} + 28*n, where n = 0. It can be seen that if the starting symbol index of the SSB transmitted with beam index 1 is 4, and the starting symbol index of the LP-SS transmitted with the same beam index is 2, then the number of symbols between the starting symbol index of the SSB and the starting symbol index of the LP-SS transmitted with the same beam index is the number of symbols occupied by the LP-SS in the time domain. The number of symbols between the starting symbol index of the SSB and the starting symbol index of the LP-SS transmitted with the same beam index can also be referred to as the number of symbols between the time domain position of the SSB and the time domain position of the LP-SS transmitted with the same beam index.

[0196] Fig. 5 is a schematic diagram illustrating the time domain position of a synchronization signal provided by another embodiment of the present application. In Fig. 5 , the SSB pattern format is case B, and f<=3 GHz.

[0197] As shown in Figure 5, the starting symbol index of the SSB is {4, 8, 16, 20} + 28*n, where n = 0. The starting symbol index of the LP-SS transmitted with the same beam index can be {12, 14, 24, 26} + 28*n, where n = 0. As an example, the SSB and LP-SS within the dashed box in Figure 5 can be considered synchronization signals transmitted with the same beam index. As can be seen, the starting symbol index of the SSB is 4, and the starting symbol index of the LP-SS is 12. Therefore, the number of symbols between the starting symbol index of the SSB and the starting symbol index of the LP-SS transmitted with the same beam index is twice the number of symbols occupied by the SSB in the time domain.

[0198] Figure 6 is a schematic diagram illustrating the time domain position of a synchronization signal provided by another embodiment of the present application. In Figure 6 , the SSB pattern format is case C, and f<=3 GHz.

[0199] As shown in Figure 6, the starting symbol index of the SSB is {2, 8} + 14*n, where n = 0, 1. The starting symbol index of the LP-SS transmitted with the same beam index can be {0, 12, 14, 26} + 28*n, where n = 0. It can be seen that when the beam index is 1, the starting symbol index of the SSB is 2, and the starting symbol index of the LP-SS is 0. Therefore, the number of symbols between the starting symbol index of the SSB and the starting symbol index of the LP-SS transmitted with the same beam index is the number of symbols occupied by the LP-SS in the time domain.

[0200] As an example, when the starting symbol index of SSB is {2, 8} + 14*n, n = 0, 1, the starting symbol index of LP-SS transmitted with the same beam index can also be {0, 12} + 14*n, n = 0, 1.

[0201] Figure 7 is a schematic diagram illustrating the time domain position of a synchronization signal provided by yet another embodiment of the present application. In Figure 7 , the SSB pattern format is case C, and f<=3 GHz.

[0202] As shown in Figure 7, the starting symbol index of the SSB is {2, 8} + 14*n, where n = 0, 1. The starting symbol index of the LP-SS transmitted with the same beam index can be {6, 12} + 14*n, where n = 0, 1. It can be seen that when the beam index is 1, the starting symbol index of the SSB is 2, and the starting symbol index of the LP-SS is 6. Therefore, the number of symbols between the starting symbol index of the SSB and the starting symbol index of the LP-SS with the same beam index is the number of symbols occupied by the SSB in the time domain.

[0203] As an example, the LP-SS in Figure 8 occupies one symbol in the time domain. Figure 8 is a schematic diagram illustrating the time domain position of a synchronization signal provided by another embodiment of the present application. In Figure 8 , the SSB pattern format is case C, and f<=3 GHz.

[0204] As shown in Figure 8, the starting symbol index of the SSB is {2, 8} + 14*n, where n = 0, 1. The starting symbol index of the LP-SS transmitted with the same beam index can be {1, 7} + 14*n, where n = 0, 1. It can be seen that when the beam index is 1, the starting symbol index of the SSB is 2, and the starting symbol index of the LP-SS is 1. Therefore, the number of symbols between the starting symbol index of the SSB and the starting symbol index of the LP-SS transmitted with the same beam index is the number of symbols occupied by the LP-SS in the time domain.

[0205] As an example, the LP-SS in Figure 9 occupies 4 symbols in the time domain. Figure 9 is a schematic diagram illustrating the time domain position of a synchronization signal provided by another embodiment of the present application. The SSB pattern format in Figure 9 is case B, and f<=3 GHz.

[0206] As shown in Figure 9, the starting symbol index of the SSB is: {4, 8, 16, 20} + 28*n, where n = 0. The starting symbol index of the LP-SS transmitted with the same beam index can be {0, 12, 24, 28} + 28*n, where n = 0. As an example, the SSB and LP-SS within the dashed box in Figure 9 can be considered synchronization signals transmitted with the same beam index. As can be seen, the starting symbol index of the SSB is 16, and the starting symbol index of the LP-SS is 24. Therefore, the number of symbols between the starting symbol index of the SSB and the starting symbol index of the LP-SS transmitted with the same beam index is twice the number of symbols occupied by the SSB in the time domain.

[0207] It should be understood that the second preset relationship for other mode types can be determined based on the method for determining the second preset relationship for different mode types shown in Figures 4 to 9, and will not be further described here. The second preset relationship is the relationship between the time domain positions of the SSB and LP-SS of beam transmissions with the same index.

[0208] In one possible implementation, the starting symbol index of the LP-SS in the different pattern formats shown in Figures 4 to 9 can be used as indication information of the first preset relationship. For example, the time domain position relationship of the LP-SS transmitted in different beams in a scenario where the pattern format is case B and f <= 3 GHz can be determined based on {2, 12, 14, 24} + 28*n, n = 0, or {12, 14, 24, 26} + 28*n, n = 0, or {0, 12, 24, 28} + 28*n, n = 0. For another example, the time domain position relationship of LP-SS transmissions with different beams in a scenario with case C and f <= 3 GHz can be determined based on {0, 12, 14, 26} + 28*n, n = 0, or {0, 12} + 14*n, n = 0, 1, or {6, 12} + 14*n, n = 0, 1, or {1, 7} + 14*n, n = 0, 1. It should be understood that different pattern types are for a transmission period (e.g., half a frame). In some embodiments, n can be a positive integer greater than or equal to 0.

[0209] Taking mode type case B, f <= 3 GHz, and LP-SS time domain positions {2, 12, 14, 24} + 28*n, where n = 0, as an example, if the starting symbol index of the first LP-SS is 2, then the starting symbol indexes of the second, fourth, and fifth LP-SSs are 12, 14, and 24, respectively. It can be seen that the number of symbols between the time domain positions of the first and second LP-SSs is the sum of twice the number of symbols occupied by the SSB in the time domain and the number of symbols occupied by the LP-SS in the time domain; the number of symbols between the time domain positions of the second and third LP-SSs is the number of symbols occupied by the LP-SS in the time domain; and the number of symbols between the time domain positions of the third and fourth LP-SSs is the sum of twice the number of symbols occupied by the SSB in the time domain and the number of symbols occupied by the LP-SS in the time domain. The number of symbols spaced between the start symbol indices of LP-SSs transmitted in different beams may also be referred to as the number of symbols spaced between the time domain positions of LP-SSs transmitted in different beams.

[0210] It should be understood that the starting symbol index of the LP-SS in other mode types can be determined based on the method for determining the starting symbol index of the LP-SS in different mode types shown in Figures 4 to 9, and will not be repeated here.

[0211] As an example, after determining the starting symbol index of the LP-SS in different mode types, the starting symbol index of the LP-SS in different mode types can be predefined through a protocol or pre-configured in the terminal device in advance, so that the LP-WUR or main receiver of the terminal device can determine the time domain position of other LP-SSs after determining the time domain position of the first LP-SS, thereby saving power consumption.

[0212] In some implementations, if LP-WUR can receive SSB, LP-WUR can achieve reception synchronization of LP-WUS through SSB by limiting the relationship between the time domain resources between the monitoring position of SSB and the monitoring position of LP-WUS and the frequency switching duration of LP-WUR and / or the wake-up delay of LP-WUR.

[0213] As an example, the fourth position can be determined based on the third position, and there is a fourth preset relationship between the time domain resources between the time domain position in the third position and the time domain position in the fourth position and the wake-up delay of LP-WUR and / or the frequency switching duration of LP-WUR. The third position is the resource position for LP-WUR to monitor SSB, and the fourth position is the resource position for LP-WUR to monitor LP-WUS.

[0214] As an example, the third position may be the monitoring position of the SSB determined by the LP-WUR according to the synchronization grid shown in Table 1. In some embodiments, the third position may be the last monitoring position among the monitoring positions of the SSB determined by the LP-WUR according to the synchronization grid shown in Table 1.

[0215] As an example, a network device may transmit multiple SSBs in the same transmission cycle. Accordingly, the LP-WUR needs to receive multiple SSBs. In this example, the third position may be the monitoring position of the last SSB that the LP-WUR needs to monitor / receive in order to meet the synchronization performance of the LP-WUR itself.

[0216] In one implementable manner, the operating frequency of SSB may be inconsistent with the operating frequency of LP-WUS. In this implementation manner, the time domain resource separated by the time domain position in the third position and the time domain position in the fourth position may have a fourth preset relationship with the wake-up delay of LP-WUR and / or the frequency switching duration of LP-WUR. As an example, the LP-WUR of the terminal device may monitor SSB at the operating frequency of SSB, and after LP-WUR itself is synchronized through SSB, LP-WUR may switch the operating frequency to the operating frequency of LP-WUS, thereby monitoring LP-WUS. It should be understood that the frequency switching duration of LP-WUR may be understood as the duration of LP-WUR switching the operating frequency. For example, the frequency switching duration of LP-WUR may be understood as the time required for LP-WUR to switch the operating frequency from the operating frequency of SSB to the operating frequency of LP-WUS. The frequency switching duration may also be referred to as the frequency switching delay, which is not specifically limited here.

[0217] As an example, when the LP-WUR is in an on state after achieving synchronization of the LP-WUR itself through the SSB, the time domain resources between the time domain positions in the third position and the time domain positions in the fourth position may have a fourth preset relationship with the frequency switching duration of the LP-WUR. For example, the time domain resources between the time domain positions in the third position and the time domain positions in the fourth position may be greater than or equal to the frequency switching duration of the LP-WUR, or the frequency switching duration of the LP-WUR may be less than the time domain resources between the time domain positions in the third position and the time domain positions in the fourth position.

[0218] As an example, after the LP-WUR achieves synchronization of the LP-WUR itself through SSB and enters a sleep state, and remains in the sleep state for a period of time before being awakened to monitor the LP-WUS, the time domain resources spaced between the time domain position in the third position and the time domain position in the fourth position may have a fourth preset relationship with the wake-up delay of the LP-WUR and / or the frequency switching duration of the LP-WUR. For example, the time domain resources spaced between the time domain position in the third position and the time domain position in the fourth position may be greater than the wake-up delay of the LP-WUR. For another example, the time domain resources spaced between the time domain position in the third position and the time domain position in the fourth position may be greater than the sum of the wake-up delay of the LP-WUR and the frequency switching duration of the LP-WUR. It should be understood that the wake-up delay of the LP-WUR may be the duration from the LP-WUR entering the sleep state to being awakened to monitor the LP-WUS.

[0219] In one achievable manner, the operating frequency of the SSB may be consistent with the operating frequency of the LP-WUS. In this implementation, the time domain resource separated by the time domain position in the third position and the time domain position in the fourth position may have a fourth preset relationship with the wake-up delay of the LP-WUS.

[0220] As an example, after the LP-WUR synchronizes itself via SSB, it enters a sleep state and remains in the sleep state for a period of time before being awakened to monitor the LP-WUR. The time domain resource between the time domain position in the third position and the time domain position in the fourth position may have a fourth preset relationship with the wake-up delay of the LP-WUR. For example, the time domain resource between the time domain position in the third position and the time domain position in the fourth position may be greater than the wake-up delay of the LP-WUR.

[0221] In this implementation, the LP-WUR of the terminal device can synchronize itself by receiving SSB signals and monitor the LP-WUS at the LP-WUS monitoring position determined based on the third position, thereby achieving LP-WUS reception. This implementation allows the LP-WUR to synchronize LP-WUS reception via SSB signals. It should be understood that the LP-WUS monitoring position is the fourth position at which the LP-WUR monitors the LP-WUS.

[0222] In some implementations, the fourth position can be determined first, and the third position can be determined based on the fourth position. For example, the fourth position of LP-WUR monitoring LP-WUS can be determined based on the paging occasion (PO), and the third position of LP-WUR monitoring or receiving the third synchronization signal (such as SSB) can be determined based on the determined fourth position and the fourth preset relationship. There is a fourth preset relationship between the time domain resources separated by the time domain position in the fourth position and the time domain position in the third position and the wake-up delay of LP-WUR and / or the frequency switching duration of LP-WUR. It should be understood that the method of determining the third position based on the fourth position and the fourth preset relationship can refer to the above-mentioned method of determining the fourth position based on the third position and the fourth preset relationship, and will not be repeated here.

[0223] In some implementations, the time domain resource between the time domain location in the fourth position and the time domain location in the fifth position may have a fifth preset relationship with at least one of the following information: a wake-up delay of the primary receiver, a synchronization delay of the primary receiver, or a frequency switching duration of the primary receiver. The fifth position is a resource location for the primary receiver of the terminal device to monitor or listen for paging messages. For example, the fifth position may be a resource location for the primary receiver of the terminal device to monitor or listen for paging messages on a PO.

[0224] As an example, the LP-WUR of the terminal device can wake up the main receiver after detecting the LP-WUS. If the main receiver has achieved its own synchronization, the main receiver can monitor the paging message at the monitoring position of the paging message indicated by the traditional method (legacy) or the default method after being awakened to determine whether the terminal device is paged. In this example, there is a fifth preset relationship between the time domain resource spaced between the time domain position in the fourth position and the time domain position in the fifth position and the wake-up delay of the main receiver. For example, the time domain resource spaced between the time domain position in the fourth position and the time domain position in the fifth position can be greater than the wake-up delay of the main receiver. It should be understood that the wake-up delay of the main receiver can be understood as the time length between the main receiver switching from the sleep state or the off state to the on state. In this example, the main receiver has achieved its own synchronization.

[0225] It should be noted that the LP-WUS can carry a UE group identifier to indicate that a terminal device exists in the terminal device group corresponding to the UE group identifier and is being paged, but it cannot indicate which terminal device in the terminal device group is being paged. The legacy paging message can contain UE identifier information to indicate the specific terminal device being paged. Therefore, after receiving the LP-WUS, the terminal device can determine whether it has been paged through the legacy paging message.

[0226] As an example, the LP-WUR of the terminal device can wake up the main receiver after detecting the LP-WUS. If the main receiver does not achieve its own synchronization, the main receiver may need to achieve its own synchronization through SSB after being awakened, and then monitor the paging message at the monitoring position of the paging message indicated by the traditional method (legacy) or the default method to determine whether the terminal device is paged. In this example, the time domain resources separated by the time domain position in the fourth position and the time domain position in the fifth position satisfy the fifth preset relationship with the wake-up delay of the main receiver and the synchronization delay of the main receiver. For example, the time domain resources separated by the time domain position in the fourth position and the time domain position in the fifth position can be greater than the sum of the wake-up delay of the main receiver and the synchronization delay of the main receiver. It should be understood that the synchronization delay of the main receiver can be understood as the time required for the main receiver to achieve its own synchronization.

[0227] As an example, when the main receiver of the terminal device can implement some or all of the functions of LP-WUR, for example, when the main receiver can implement reception synchronization of LP-WUS, if the operating frequency of LP-WUS is inconsistent with the operating frequency of the paging message, the main receiver can achieve reception synchronization of LP-WUS on the operating frequency of LP-WUS, and then switch the operating frequency to the operating frequency of the paging message, thereby monitoring the paging message. In this example, the time domain resource separated by the time domain position in the fourth position and the time domain position in the fifth position can have a fifth preset relationship with the frequency switching duration of the main receiver. For example, the time domain resource separated by the time domain position in the fourth position and the time domain position in the fifth position can be greater than the frequency switching duration of the main receiver. The frequency switching duration of the main receiver can be understood as the time required for the main receiver to switch the operating frequency from the operating frequency of LP-WUS to the operating frequency of the paging message.

[0228] It should be understood that in order to ensure that LP-WUR can achieve reception synchronization of LP-WUS through LP-SS, the operating frequency of LP-SS can be made consistent with the operating frequency of LP-WUS, or the relationship between the time domain resources between the monitoring position of LP-SS and the monitoring position of LP-WUS and the frequency switching duration of LP-WUR and / or the wake-up delay of LP-WUR can be limited. This application does not impose any restrictions on this.

[0229] FIG10 is a schematic diagram of the structure of a communication device provided by an embodiment of the present application. As shown in FIG10 , the device 1000 may include a processing module 1010 .

[0230] As an example, the apparatus 1000 may be used to implement the method implemented by the terminal device in Figure 3. For example, the processing module 1010 may be used to implement S301 and S302.

[0231] It should be understood that the device 1000 here is embodied in the form of a functional module. The term "module" here may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a dedicated processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combined logic circuit and / or other suitable components that support the described functions. In an optional example, those skilled in the art will understand that the device 1000 may be specifically the terminal device in the above embodiment, and the device 1000 may be used to execute the various processes and / or steps corresponding to the terminal device in the above method embodiment, or the device 1000 may be used to implement the various steps / operations performed by the terminal device in the above method embodiment. To avoid repetition, it will not be described here.

[0232] In an embodiment of the present application, apparatus 1000 has the function of implementing the corresponding steps performed by the terminal device in the above method; the above functions can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions. As an example, apparatus 1000 can also be a chip or a chip system, such as a system on chip (SoC).

[0233] Figure 11 is a schematic diagram of the structure of a communication device provided by another embodiment of the present application. The device 1100 shown in Figure 11 can be used to implement the method executed by the terminal device in the above method embodiment.

[0234] As shown in Figure 11 , the apparatus 1100 of this embodiment includes a memory 1110, a processor 1120, a communication interface 1130, and a bus 1140. The memory 1110, the processor 1120, and the communication interface 1130 are connected to each other via the bus 1140.

[0235] The memory 1110 may be a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 1110 may store programs. When the program stored in the memory 1110 is executed by the processor 1120, the processor 1120 is configured to execute the various steps / operations performed by the terminal device in the above-described method embodiment.

[0236] The processor 1120 can be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits to execute relevant programs to implement the communication method shown in the method embodiment of the present application.

[0237] The processor 1120 may also be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the communication method shown in the embodiment of the present application may be completed by hardware integrated logic circuits in the processor 1120 or software instructions.

[0238] The processor 1120 may also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The methods, steps, and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. The general-purpose processor may be a microprocessor or any conventional processor.

[0239] The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 1110, and the processor 1120 reads the information in the memory 1110 and, in combination with its hardware, completes the functions required to be performed by the units included in the communication device of the present application. For example, the various steps / functions performed by the terminal device in the above method embodiment can be executed.

[0240] Optionally, the memory 1110 and the processor 1120 may be integrated together.

[0241] The communication interface 1130 may use, but is not limited to, a transceiver or other transceiver device to implement communication between the apparatus 1100 and other devices or apparatuses.

[0242] The bus 1140 may include a path for transmitting information between the various components of the device 1100 (eg, the memory 1110 , the processor 1120 , and the communication interface 1130 ).

[0243] Some embodiments of the present application also provide a computer program product that, when executed on a processor, can implement the methods described in the aforementioned embodiments. Some embodiments of the present application also provide a computer-readable storage medium that contains computer instructions that, when executed on a processor, can implement the methods described in the aforementioned embodiments.

[0244] It should be noted that the modules or components shown in the above embodiments may be one or more integrated circuits configured to implement the above methods, such as one or more application specific integrated circuits (ASICs), one or more microprocessors (digital signal processors (DSPs), or one or more field programmable gate arrays (FPGAs). For another example, when a module is implemented by a processing element calling a program code, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call a program code, such as a controller. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0245] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, software modules or any combination thereof. When software is used for implementation, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive (SSD)).

[0246] It will be understood that the various numerical numbers involved in the embodiments of the present application are merely distinctions for the convenience of description and are not intended to limit the scope of the embodiments of the present application.

[0247] It can be understood that in the embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Claims

1. A communication method, characterized in that: The terminal device includes a main receiver and a low-power wake-up receiver, and the method includes: determining a first synchronization grid; The low power wake-up receiver of the terminal device monitors the first synchronization signal according to the first synchronization grid.

2. The method according to claim 1, characterized in that The method further comprises: When the first synchronization signal is monitored according to the first synchronization grid, the second position for receiving the second synchronization signal is determined according to the first position, the first position is the resource position where the low-power wake-up receiver monitors the first synchronization signal according to the first synchronization grid, the first synchronization signal and the second synchronization signal are two different types of synchronization signals, or the first synchronization signal and the second synchronization signal are the same type of synchronization signals with different beam directions.

3. The method according to claim 2, characterized in that The frequency domain position in the first position is an integer multiple of the subcarrier spacing.

4. The method according to claim 2 or 3, characterized in that There is a first preset relationship between the number of resources spaced between the time domain position in the first position and the time domain position in the second position and the number of resources occupied by the first synchronization signal in the time domain and / or the number of resources occupied by the synchronization signal block SSB in the time domain.

5. The method according to any one of claims 2 to 4, characterized in that When the second synchronization signal is SSB, the main receiver of the terminal device monitors SSB according to the second synchronization grid. When the monitoring times are the same, there is an offset between the monitoring position determined according to the first synchronization grid and the monitoring position determined according to the second synchronization grid.

6. A communication method, characterized in that: The terminal device includes a main receiver and a low-power wake-up receiver, and the method includes: Determine a first resource location, where the first resource location is a resource location where a synchronization signal block SSB is detected by a main receiver of the terminal device; A second resource location of the low-power wake-up receiver of the terminal device for receiving a first synchronization signal is determined according to the first resource location.

7. The method according to claim 6, characterized in that There is a second preset relationship between the number of resources separated by the time domain position in the first resource position and the time domain position in the second resource position and the number of resources occupied by the first synchronization signal in the time domain and / or the number of resources occupied by SSB in the time domain.

8. The method according to claim 6 or 7, characterized in that The method further comprises: The third resource position is determined based on the second resource position, and there is a third preset relationship between the number of resources separated by the time domain position in the third resource position and the time domain position in the second resource position and the number of resources occupied by the first synchronization signal in the time domain and / or the number of resources occupied by SSB in the time domain. The third resource position is the resource position where the low-power wake-up receiver receives the second synchronization signal, and the first synchronization signal and the second synchronization signal are synchronization signals of the same type with different beam directions.

9. A communication device, characterized in that: The method comprises various functional modules for implementing the method according to any one of claims 1 to 5 or any one of claims 6 to 8.

10. A communication device, characterized in that: include: A processor, the processor being coupled to a memory, the memory being used to store a computer program, wherein when the processor calls the computer program, the device is caused to execute the method according to any one of claims 1 to 5 or any one of claims 6 to 8.

11. A computer program product, characterized in that The method comprises a computer program code, which, when executed on a computer, causes the computer to implement the method according to any one of claims 1 to 5 or any one of claims 6 to 8.

12. A computer-readable medium, characterized in that The computer-readable medium stores a program code for computer execution, the program code including instructions for executing the method according to any one of claims 1 to 5 or any one of claims 6 to 8.

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