Communication method and communication device

Abstract

The invention provides a communication method and a communication device applied to the field of wireless communication. In the technical scheme provided by the invention, the low-power-consumption wake-up receiver of the terminal equipment can determine the monitoring position of the first synchronization signal according to the first synchronization grid and monitor the first synchronization signal at the monitoring position, so that the time domain position and the frequency domain position of the first synchronization signal can be determined, the first synchronization signal is received, and the user experience is improved. Therefore, the low-power-consumption wake-up receiver can realize receiving synchronization of other signals (such as a low-power-consumption wake-up signal) through the first synchronization signal.

Description

Technical Field

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

[0002] In Release 18 (R18) of the 3rd Generation Partnership Project (3GPP), a Low Power Wake Up Signal (LP-WUS) was introduced to support the low-power mechanism of terminal devices in R18. For example, a terminal device can use a Low Power Wakeup Receiver (LP-WUR) to monitor the LP-WUS, and after receiving the LP-WUS, wake up the main receiver to perform a paging process, or a random access process, or to achieve data reception and transmission, thereby achieving the purpose of energy saving.

[0003] However, after the introduction of the LP-WUS, how to achieve reception synchronization of the LP-WUS has become an urgent problem to be solved. Summary of the Invention

[0004] This application provides a communication method and a communication device, enabling a Low Power Wakeup Receiver (LP-WUR) of a terminal device to achieve reception synchronization of the LP-WUS.

[0005] In a first aspect, this application provides a communication method, which is applied to a terminal device. The terminal device includes a main receiver and a low power wakeup receiver. The method includes: determining a first synchronization grid; and the low power wakeup receiver of the terminal device monitoring a first synchronization signal according to the first synchronization grid.

[0006] A possible implementation is that the terminal device includes a main receiver, and the main receiver can implement some or all of the functions of the low power wakeup receiver (LP-WUR). For example, the module for implementing the LP-WUR function can be included in the main receiver. Another example is that the module included in the LP-WUR is a part of the template included in the main receiver. Wherein, when the terminal device is in a low-power state, the terminal device can turn on the LP-WUR.

[0007] One possible implementation is as follows: The terminal device includes a main receiver and a first receiver. The main receiver can implement some functions of the LP-WUR, and the first receiver can implement some functions of the LP-WUR. For example, the module for implementing the LP-WUR function can include a first part module and a second part module. The first part module can be included in the main receiver, and the second part module can be included in the first receiver. Another example is that the module in the LP-WUR includes a first part module and a second part module. The first part module is a part of the modules included in the main receiver, and the second part module is a part of the modules included in the first receiver. Among them, when the terminal device is in a low-power state, the terminal device can enable the LP-WUR.

[0008] As an example, this method can be executed by the terminal device, or by a chip system, a hardware circuit, and / or a software module applied to the terminal device.

[0009] As an example, the first synchronization signal can be a low power synchronous signal (LP-SS). The LP-WUR of the terminal device can achieve downlink synchronization with the network device through the LP-SS, or the LP-WUR of the terminal device can achieve its own synchronization through the LP-SS, or achieve synchronization between the LP-WUR and the local clock, or limit the time offset and / or frequency offset of the LP-WUR within a certain range, or achieve no time offset or frequency offset for 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 / PBCH block, SSB). Therefore, a new synchronization signal, such as the LP-SS, can be designed for the LP-WUR so that the LP-WUR can achieve its own synchronization through the LP-SS.

[0010] As an example, the first synchronization raster can be understood as the synchronization raster used by the LP-WUR of the terminal device to receive the LP-SS.

[0011] As an example, the first synchronization raster can be predefined by the protocol.

[0012] 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 its own synchronization by receiving the LP-SS, and then achieve 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, so as to achieve 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 an LP-SS at the monitoring position. If an LP-SS is detected at a certain monitoring position, the frequency domain position in this monitoring position can be considered as the frequency domain position of the LP-SS, and the time domain position in this monitoring position can be used as the time domain position of the LP-SS.

[0013] Combined with the first aspect, in some implementation manners of the first aspect, the method further includes: when the first synchronization signal is detected according to the first synchronization grid, determining a second position for receiving a second synchronization signal according to a first position, where the first position is the resource position where the low-power wake-up receiver detects the first synchronization signal according to the first synchronization grid, and 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 signal with different beam directions.

[0014] 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 the time domain resource and / or the frequency domain resource of the first synchronization signal.

[0015] 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 different types of synchronization signals. At this time, the second synchronization signal can be received by the primary receiver.

[0016] As an example, the primary receiver of the terminal device can achieve downlink synchronization with the network device through the SSB, or the primary receiver of the terminal device can achieve its own synchronization through the SSB, or achieve the synchronization between the primary receiver and the local clock, or limit the time offset and / or frequency offset of the primary receiver within a certain range, or achieve that the primary receiver has no time offset or frequency offset. Among them, when the operating frequency band of the primary receiver is the same as that of the 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 operating frequency band can also be referred to as the operating frequency point, the operating center frequency point, the operating frequency range, or the frequency domain unit, etc. The frequency domain unit is, for example, Hertz, resource block (RB), resource element (RE), etc.

[0017] As an example, when the first synchronization signal is LP-SS, the second synchronization signal can be LP-SS with different beam directions. In this example, the first synchronization signal and the second synchronization signal are of the same type of synchronization signal, and the frequency domain position of the first synchronization signal is the same as the frequency domain position of the second synchronization signal. At this time, the second synchronization signal can be received by the LP-WUR.

[0018] As an example, different beam directions can be understood as that the antenna transmitting the first synchronization signal is different from the antenna transmitting the second synchronization signal; or, different beam directions can be understood as that 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 that the spatial dimensions in which the first synchronization signal and the second synchronization signal are transmitted are different; or, different beam directions can be understood as that the spatial domain resources occupied by the transmission of the first synchronization signal and the second synchronization signal are different. Among them, the antenna transmitting the synchronization signal can also be understood as the antenna array or antenna direction for transmitting the synchronization signal.

[0019] As an example, the modulation method of LP-SS may include at least one of the following modulation methods: on-off keying (OOK), frequency shift keying (FSK), or orthogonal frequency-division multiplexing (OFDM). For example, the modulation method of LP-SS may be a combined modulation method of OOK and OFDM, or a combined modulation method of FSK and OFDM. Among them, OOK modulation can be understood as transmitting signals in some time domain resources and not transmitting signals in some time domain resources. The combined modulation method of OOK and OFDM can be understood as using OOK modulation to carry a part of the information and using OFDM modulation to carry another part of the information. For example, the combined modulation method of OOK and OFDM can be understood as using envelope detection to obtain a part of the information of LP-SS, carrying it using a sequence within the time domain resources where OOK has information, and using correlation detection or sequence detection to obtain another part of the information of LP-SS. Among them, the above sequence can be one sequence or multiple sequences. Another example is that the combined modulation method of OOK and OFDM can be understood as using OOK modulation to carry all the information and carrying it using a sequence within the time domain resources where OOK has information. Among them, the above sequence can be one sequence or multiple sequences. The sequence can be an OFDM sequence, or a Zadoff-Chu (ZC) sequence, or a m-sequence, etc., which is not limited here. The time domain resource can also be referred to as a time domain unit or a time domain range.

[0020] As an example, the modulation methods of the first synchronization signal and the second synchronization signal may be the same or different, which is not limited here. For example, both the first synchronization signal and the second synchronization signal may use OOK modulation, and the part with signals does not superimpose an OFDM sequence. Another example is that the first synchronization signal uses OOK modulation, the part with signals does not superimpose an OFDM sequence, and the second synchronization signal uses sequence modulation, such as using ZC sequence modulation or m-sequence modulation. Another example is that the first synchronization signal uses OOK modulation, the part with signals superimposes an OFDM sequence, the OFDM sequence is, for example, a ZC sequence or a m-sequence, and the second synchronization signal uses sequence modulation, such as the second synchronization signal may use ZC sequence modulation or m-sequence modulation.

[0021] In this implementation manner, the second position of the second synchronization signal may be determined based on the first position of the first synchronization signal, so that the terminal device can only monitor the first synchronization signal and can know the frequency domain position and time domain position of the second synchronization signal without monitoring the second synchronization signal, saving power consumption.

[0022] Combined with the first aspect, in some implementation manners of the first aspect, the frequency domain position in the first position is an integer multiple of the subcarrier spacing.

[0023] In this implementation manner, the frequency-domain position of the first synchronization signal is set to be the first frequency-domain position, and the first frequency-domain position 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 the LP-SS. Another example is that when 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 the LP-SS. Among them, the first frequency-domain position can be understood as the frequency-domain position in the first position.

[0024] In some embodiments, the first frequency-domain position being an integer multiple of the subcarrier spacing can also be understood as starting from a 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 requirements, and specific limitations are not provided here.

[0025] As an example, the preset frequency-domain position can be the initial frequency-domain position. It should be noted that from the perspective of the system bandwidth of the communication system, there is an initial frequency-domain position of the frequency-domain resources in the entire communication system bandwidth. As an example, the preset frequency-domain position can be a frequency-domain position with a preset offset from the initial frequency-domain position. The preset offset can be set according to actual requirements or obtained through signaling, and specific limitations are not provided in this application.

[0026] Combined with the first aspect, in some implementation manners of the first aspect, the number of resources separated between the time-domain position in the first position and the time-domain position in the second position has a first preset relationship with 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.

[0027] As an example, resources can be understood as time-domain resources or time-domain units. Time-domain units are, for example, system frames, subframes, seconds, milliseconds, time slots, symbols, or mini time slots, etc.

[0028] As an example, the first preset relationship can be predefined by a protocol or preconfigured in the terminal device in advance, and no limitations are provided here. For example, the first preset relationship can be preconfigured in the LP-WUR, main receiver, or other storage devices of the terminal device, and no limitations are provided here.

[0029] In this implementation manner, 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, so that the frequency domain position and the time domain position of the second synchronization signal can be obtained without monitoring the second synchronization signal, saving power consumption.

[0030] Combined with the first aspect, in some implementation manners of the first aspect, when the second synchronization signal is an SSB, the main receiver of the terminal device monitors the SSB according to the second synchronization grid. When the number of monitoring times is 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.

[0031] In this implementation manner, the LP-WUR of the terminal device can determine the monitoring position of the LP-SS based on the first synchronization grid, and the main receiver of the terminal device can determine the monitoring position of the SSB based on the second synchronization grid. To avoid conflicts or collisions between the monitoring position of the SSB and the monitoring position of the LP-SS, an offset can be set between the monitoring position of the LP-SS and the monitoring position of the SSB, thereby improving the efficiency of the LP-WUR monitoring the LP-SS and the main receiver monitoring the SSB, and further improving the communication efficiency. For example, after the second synchronization grid is offset as a whole within the frequency domain range, the first synchronization grid can be obtained.

[0032] In a second aspect, the present application provides a communication method, which is applied to a terminal device. The terminal device includes a main receiver and a low-power wake-up receiver. The method includes: determining a first resource position, where the first resource position is the resource position where the main receiver of the terminal device monitors the SSB; and determining a second resource position for the low-power wake-up receiver of the terminal device to receive the first synchronization signal according to the first resource position.

[0033] A possible implementation manner is as follows: The terminal device includes a main receiver, and the main receiver can implement some or all of the functions of the LP-WUR. For example, the module for implementing the LP-WUR function can be included in the main receiver. Another example is that the module included in the LP-WUR is a 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.

[0034] One possible implementation is as follows: The terminal device includes a main receiver and a first receiver. The main receiver can implement some functions of the LP-WUR, and the first receiver can implement some functions of the LP-WUR. For example, the module for implementing the LP-WUR function can include a first part module and a second part module. The first part module can be included in the main receiver, and the second part module can be included in the first receiver. Another example is that the module in the LP-WUR includes a first part module and a second part module. The first part module is a part of the modules included in the main receiver, and the second part module is a part of the modules included in the first receiver. Among them, when the terminal device is in a low-power state, the terminal device can turn on the LP-WUR.

[0035] As an example, this method can be executed by the terminal device, or can be executed by a chip system, a hardware circuit, and / or a software module applied to the terminal device.

[0036] As an example, the first synchronization signal can be the LP-SS. The LP-WUR of the terminal device can achieve downlink synchronization with the network device through the LP-SS, or the LP-WUR of the terminal device can achieve its own synchronization through the LP-SS, or achieve synchronization between the LP-WUR and the local clock, or limit the time offset and / or frequency offset of the LP-WUR within a certain range, or achieve that the LP-WUR has no time offset or frequency offset. 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 SSB. Therefore, a new synchronization signal, such as the LP-SS, can be designed for the LP-WUR so that the LP-WUR can achieve its own synchronization by receiving the LP-SS. It should be understood that the LP-SS is only an example and not a limitation. For example, as long as the LP-WUR can achieve its own synchronization by receiving a certain signal, then this signal can be considered as the LP-SS. It should be understood that the LP-SS can also have other names, which are not limited here.

[0037] As an example, the first resource location can include a time-domain location and / or a frequency-domain location, and the second resource location can include a time-domain location and / or a frequency-domain location.

[0038] As an example, when the operating frequency band of the primary receiver is the same as that 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 the same as that of the LP-SS, and the time-domain position of the SSB is different from that 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. Herein, the operating frequency band can also be referred to as the operating frequency point, the operating center frequency point, the operating frequency range, or the frequency-domain unit, etc. The frequency-domain unit is, for example, Hertz, RB, RE, etc.

[0039] 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 its own synchronization by receiving the LP-SS, and further achieve the reception synchronization of the LP-WUS. In this technical solution, after the primary 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 detected SSB, so as to achieve the reception of the LP-SS. In this technical solution, the LP-WUR can determine the time-domain position and the frequency-domain position of the LP-SS without monitoring the LP-SS, saving power consumption.

[0040] As an example, the first resource position and the second resource position can be predefined by the protocol.

[0041] Combined with the second aspect, in some implementation manners of the second aspect, the number of resources between the time-domain position in the first resource position and the time-domain position in the second resource position has a second preset relationship with 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.

[0042] As an example, the time-domain position can be understood as a time-domain resource, or can be understood as a resource, or can be understood as a moment, or understood as a time-domain unit. The time-domain unit is, for example, a system frame, a subframe, a second, a millisecond, a time slot, a symbol, a mini time slot, etc.

[0043] As an example, the second preset relationship can be predefined by the protocol, or preconfigured in the terminal device in advance, which is not limited herein.

[0044] In this implementation manner, when determining the time domain position of the SSB, the main receiver or LP-WUR of the terminal device may determine the time domain position of the LP-SS based on a second preset relationship, so that the terminal device can determine the frequency domain position and time domain position of the LP-SS without monitoring the LP-SS, saving power consumption. Among them, the time domain position of the SSB is the time domain position in the first resource position, and the time domain position of the LP-SS is the time domain position in the second resource position.

[0045] Combined with the second aspect, in some implementation manners of the second aspect, the method further includes: determining a third resource position according to the second resource position, where the number of resources between the time domain position in the third resource position and the time domain position in the second resource position has a third preset relationship with 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. The third resource position is the resource position where the low-power wake-up receiver receives the second synchronization signal. The first synchronization signal and the second synchronization signal are the same type of synchronization signals with different beam directions.

[0046] As an example, the second synchronization signal may be the LP-SS.

[0047] As an example, different beam directions may be understood as the antennas or antenna arrays transmitting the first synchronization signal being different from the antennas or antenna arrays transmitting the second synchronization signal; or, different beam directions may be understood as the indexes of the beams transmitting the first synchronization signal being different from the indexes of the beams transmitting the second synchronization signal; or, different beam directions may be understood as the first synchronization signal and the second synchronization signal being in different spatial dimensions.

[0048] As an example, the network device may transmit multiple LP-SSs within one transmission period. Each LP-SS among the multiple LP-SSs may be transmitted through a beam in a specific direction. Each beam in the multiple specific directions transmits one LP-SS. For example, the network device may transmit multiple beams in specific directions 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 there is a third preset relationship between the time domain positions of the LP-SSs transmitted by different beams. In this example, the first synchronization signal may be understood as the first LP-SS transmitted by the network device, and the second synchronization signal may be understood as any LP-SS transmitted by the network device except the first LP-SS.

[0049] As an example, the third preset relationship may be predefined by the protocol or pre-configured in the terminal device in advance, which is not limited here.

[0050] In this implementation manner, when the main receiver or LP-WUR of the terminal device determines the time domain position of the first synchronization signal, it 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, so that the terminal device can determine the time domain position and frequency domain position of the second synchronization signal without monitoring the second synchronization signal, saving power consumption. Among them, the time domain position of the first synchronization signal is the time domain position in the second resource position, and the time domain position of the second synchronization signal is the time domain position in the third resource position.

[0051] In a third aspect, the present application provides a communication method, which is applied to a terminal device. The terminal device includes a main receiver and a low-power wake-up receiver. The method includes: determining a third position, where the third position is the resource position where the low-power wake-up receiver of the terminal device monitors a third synchronization signal; determining a fourth position where the low-power wake-up receiver of the terminal device monitors a low-power wake-up signal according to the third position, and there is a fourth preset relationship between the time domain resources separated by the time domain position in the third position and the time domain position in the fourth position and the wake-up delay of the low-power wake-up receiver and / or the frequency point switching duration of the low-power wake-up receiver.

[0052] As an example, this method can be executed by the terminal device, or can be executed by a chip system, a hardware circuit, and / or a software module applied to the terminal device.

[0053] A possible implementation manner is: the terminal device includes a main receiver, and the main receiver can implement some or all functions of the LP-WUR. For example, the module for implementing the LP-WUR function can be included in the main receiver. Another example is that the module included in the LP-WUR is a 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.

[0054] A possible implementation manner is: the terminal device includes a main receiver and a first receiver. The main receiver can implement some functions of the LP-WUR, and the first receiver can implement some functions of the LP-WUR. For example, the module for implementing the LP-WUR function can include a first part module and a second part module. The first part module can be included in the main receiver, and the second part module can be included in the first receiver. Another example is that the module in the LP-WUR includes a first part module and a second part module. The first part module is a part of the module included in the main receiver, and the second part module is a part of the module included in the first receiver. Among them, when the terminal device is in a low-power state, the terminal device can turn on the LP-WUR.

[0055] As an example, the third synchronization signal may be an SSB, and the LP-WUR may implement the reception of the SSB. For example, the LP-WUR has the ability of signal processing (such as signal decoding, complex convolution, etc.) to implement the monitoring and reception of the SSB.

[0056] As an example, the LP-WUR of the terminal device may achieve downlink synchronization with the network device through the SSB, or the LP-WUR of the terminal device may achieve its own synchronization through the SSB, or achieve the synchronization between the LP-WUR and the local clock, or limit the time offset and / or frequency offset of the LP-WUR within a certain range, or achieve that the LP-WUR has no time offset or frequency offset.

[0057] As an example, the LP-WUR of the terminal device may determine the monitoring position of the LP-WUS based on the third position and monitor the LP-WUS at the monitoring position of the LP-WUS, so as to achieve the reception of the LP-WUS. It should be understood that the monitoring position of the LP-WUS is the fourth position where the LP-WUR monitors the LP-WUS, or the resource position where the LP-WUR monitors the LP-WUS.

[0058] In an implementable manner, the operating frequency point of the SSB may be different from the operating frequency point of the LP-WUS. Among them, the operating frequency point may also be referred to as the operating frequency band, the operating center frequency point, the operating frequency range, or the frequency domain unit, etc. In this implementation manner, the time domain resources separated 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 point switching duration of the LP-WUR. The time domain resources may also be referred to as the time domain unit or the time domain range.

[0059] As an example, the LP-WUR of the terminal device may monitor the SSB at the operating frequency point of the SSB, and after achieving its own synchronization through the SSB, the LP-WUR may switch the operating frequency point to the operating frequency point of the LP-WUS, so as to monitor the LP-WUS. It should be understood that the frequency point switching duration of the LP-WUR may be understood as the duration for the LP-WUR to switch the operating frequency point. For example, the frequency point switching duration of the LP-WUR may be understood as the time required for the LP-WUR to switch the operating frequency point from the operating frequency point of the SSB to the operating frequency point of the LP-WUS. The frequency point switching duration may also be referred to as the frequency point switching delay, which is not specifically limited herein.

[0060] As an example, when the LP-WUR has been in the on state after achieving its own synchronization through the SSB, the time-domain resources 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 frequency-point switching duration of the LP-WUR. For example, the time-domain resources between the time-domain position in the third position and the time-domain position in the fourth position may be greater than or equal to the frequency-point switching duration of the LP-WUR, or the frequency-point switching duration of the LP-WUR may be less than the time-domain resources between the time-domain position in the third position and the time-domain position in the fourth position.

[0061] As an example, when the LP-WUR enters the sleep state after achieving its own synchronization through the SSB and remains in the sleep state for a period of time and then is awakened to monitor the LP-WUS, the time-domain resources 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-point switching duration of the LP-WUR. For example, the time-domain resources 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. Another example is that the time-domain resources 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-point switching duration of the LP-WUR. It should be understood that the wake-up delay of the LP-WUR may be the duration from when the LP-WUR enters the sleep state to when it is awakened to monitor the LP-WUS.

[0062] In an implementable manner, the operating frequency point of the SSB may be the same as the operating frequency point of the LP-WUS. In this implementation manner, the time-domain resources 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.

[0063] As an example, when the LP-WUR enters the sleep state after achieving its own synchronization through the SSB and remains in the sleep state for a period of time and then is awakened to monitor the LP-WUS, the time-domain resources 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 resources 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.

[0064] In this technical solution, the LP-WUR of the terminal device can achieve its own synchronization by receiving the SSB, and determine the fourth position for monitoring the LP-WUS based on the resource position of the SSB monitored by the LP-WUR and the fourth preset relationship, so that the LP-WUR can achieve the reception synchronization of the LP-WUS through the SSB.

[0065] In a fourth aspect, the present application provides a communication device, which includes various modules for implementing the method in the first aspect or any one of its implementation manners, and each module can be implemented in the form of hardware and / or software.

[0066] For example, the device may include: a processing module. The processing module is configured to determine a first synchronization grid; the processing module is further configured to monitor a first synchronization signal according to the first synchronization grid.

[0067] In combination with the fourth aspect, in some implementation manners of the fourth aspect, when the processing module further monitors the first synchronization signal according to the first synchronization grid, it determines a second position for receiving a second synchronization signal according to a first position, where 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, and 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.

[0068] In combination with the fourth aspect, in some implementation manners of the fourth aspect, the frequency-domain position in the first position is an integer multiple of the subcarrier spacing.

[0069] In combination with the fourth aspect, in some implementation manners of the fourth aspect, the number of resources between the time-domain position in the first position and the time-domain position in the second position has a first preset relationship with 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.

[0070] In combination with the fourth aspect, in some implementation manners of the fourth aspect, when the second synchronization signal is an SSB, the processing module further monitors the SSB according to a second synchronization grid, and when the number of monitoring times is 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.

[0071] In a fifth aspect, the present application provides a communication device, which includes various modules for implementing the method in the second aspect or any one of its implementation manners, and each module can be implemented in the form of hardware and / or software.

[0072] For example, the device may include: a processing module. The processing module is configured to determine a first resource position, where the first resource position is the resource position where the main receiver of the terminal device monitors the synchronization signal block SSB; the processing module is further configured to determine a second resource position for the low-power wake-up receiver of the terminal device to receive a first synchronization signal according to the first resource position.

[0073] In combination with the fifth aspect, in some implementations of the fifth aspect, the number of resources separated between the time domain position in the first resource position and the time domain position in the second resource position has a second preset relationship with 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.

[0074] In combination with the fifth aspect, in some implementations of the fifth aspect, the processing module is further configured to determine a third resource position according to the second resource position. The number of resources separated between the time domain position in the third resource position and the time domain position in the second resource position has a third preset relationship with 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. The third resource position is the resource position where the low-power wake-up receiver receives the second synchronization signal. The first synchronization signal and the second synchronization signal are of the same type with different beam directions.

[0075] In a sixth aspect, the present application provides a communication device, which includes each module for implementing the method in the third aspect or any one of its implementations. Each module can be implemented in the form of hardware and / or software.

[0076] For example, the device may include: a processing module. The processing module is configured to determine a third position, where the third position is the resource position where the low-power wake-up receiver of the terminal device monitors the third synchronization signal; the processing module is further configured to determine a fourth position where the low-power wake-up receiver of the terminal device monitors the low-power wake-up signal according to the third position. The time domain resources separated between the time domain position in the third position and the time domain position in the fourth position have a fourth preset relationship with the wake-up delay of the low-power wake-up receiver and / or the frequency point switching duration of the low-power wake-up receiver.

[0077] In a seventh aspect, the present application provides a communication device, including a processor, which can be coupled with a memory and is configured to call program code in the memory to execute the method described in the first aspect or any one of its possible implementations. Optionally, the device further includes a memory. Optionally, the device further includes a communication interface, and the processor is coupled with the communication interface.

[0078] As an example, the device may be a terminal device, or a chip system, a hardware circuit, and / or a software module applied to the terminal device.

[0079] In an eighth aspect, the present application provides a communication device, including a processor, which may be coupled to a memory and is configured to call program code in the memory to execute the method described in the second aspect or any one of its possible implementation manners. Optionally, the device further includes a memory. Optionally, the device further includes a communication interface, and the processor is coupled to the communication interface.

[0080] As an example, the device may be a terminal device, or may be a chip system, a hardware circuit, and / or a software module applied to a terminal device.

[0081] In a ninth aspect, the present application provides a communication device, including a processor, which may be coupled to a memory and is configured to call program code in the memory to execute the method described in the third aspect or any one of its possible implementation manners. Optionally, the device further includes a memory. Optionally, the device further includes a communication interface, and the processor is coupled to the communication interface.

[0082] As an example, the device may be a terminal device, or may be a chip system, a hardware circuit, and / or a software module applied to a terminal device.

[0083] In a tenth aspect, the present application provides a computer program product containing instructions, which, when running on a computer, causes the computer to execute the method described in the first aspect, the second aspect, the third aspect, or any one of their possible implementation manners.

[0084] In an eleventh aspect, the present application provides a computer-readable medium, which stores program code for a device to execute, and the program code includes code for executing the method described in the first aspect, the second aspect, the third aspect, or any one of their possible implementation manners.

[0085] For the technical effects that can be achieved by any one of the fourth aspect to the eleventh aspect and any one of their possible designs, please refer to the technical effects that can be brought by the first aspect to the third aspect described above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0086] Figure 1 is a schematic diagram of the architecture of a mobile communication system provided by an embodiment of the present application;

[0087] Figure 2 is a schematic diagram of the working process of a low-power wake-up receiver;

[0088] Figure 3 is an exemplary illustration diagram of a communication method provided by an embodiment of the present application;

[0089] Figure 4Schematic diagram showing the time-domain position of a synchronization signal provided by an embodiment of the present application;

[0090] Figure 5 Schematic diagram showing the time-domain position of a synchronization signal provided by another embodiment of the present application;

[0091] Figure 6 Schematic diagram showing the time-domain position of a synchronization signal provided by another embodiment of the present application;

[0092] Figure 7 Schematic diagram showing the time-domain position of a synchronization signal provided by yet another embodiment of the present application;

[0093] Figure 8 Schematic diagram showing the time-domain position of a synchronization signal provided by another embodiment of the present application;

[0094] Figure 9 Schematic diagram showing the time-domain position of a synchronization signal provided by another embodiment of the present application;

[0095] Figure 10 Schematic diagram of the structure of a communication device provided by an embodiment of the present application;

[0096] Figure 11 Schematic diagram of the structure of a communication device provided by another embodiment of the present application. Detailed implementation manners

[0097] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0098] For the convenience of clearly describing the technical solutions of the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish the same items or similar items with basically the same functions and effects. Those skilled in the art can understand that the terms "first", "second", etc. do not limit the quantity and execution order, and the terms "first", "second", etc. do not necessarily limit to be different.

[0099] It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to give examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the present application should not be construed as being more preferred or having more advantages than other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0100] In the embodiments of the present application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, or B exists alone, where A and B may be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refer 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 may represent: a, b, c, a - b, a - c, b - c, or a - b - c, where a, b, c may be single or multiple.

[0101] The technical solution provided by this application can be applied to various communication systems, including but not limited to: narrow band-internet of things (NB-IoT), 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, 3rd generation (3G) mobile communication system, long term evolution (LTE) system, LTE advanced (LTE-A) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), 4th generation (4G) mobile communication system, 5th generation (5G) mobile communication system, three major application scenarios of 5G new radio (NR) communication system: enhanced mobile broadband (eMBB), ultra-reliable and low latency communications (URLLC), and massive machine type communication (mMTC), as well as future 6th generation (6G) mobile communication system, such as: high frequency, terahertz, optical communication, etc. This application does not make specific restrictions on this.

[0102] Exemplarily, Figure 1 is a schematic diagram of the architecture of the mobile communication system provided by an embodiment of this application. As Figure 1 shown, the mobile communication system includes a core network device 110, a radio access network device 120, and at least one terminal device (such asFigure 1 the terminal devices 130 and 140 therein). The terminal device can be connected to the radio access network device wirelessly, and the radio access network device can be connected to the core network device wirelessly or by wire. The core network device and the radio access network device can be independent different physical devices, or the functions of the core network device and the logical functions of the radio access network device can be integrated on the same physical device, or the functions of part of the core network device and part of the radio access network device can be integrated on one physical device. This application does not limit this. The terminal device can be fixed in position or movable. It should be understood that Figure 1 is only a schematic diagram, and other network devices may also be included in this communication system. For example, a wireless relay device and a wireless backhaul device may also be included. Figure 1 are not drawn in. The embodiments of this application do not limit the number of core network devices, radio access network devices, and terminal devices included in this mobile communication system.

[0103] The radio access network device can be an access device for the terminal device to access this mobile communication system wirelessly. The radio 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 technologies and specific device forms adopted by the radio access network device. Among them, the device for implementing the radio access network device can be the radio access network device or a device capable of supporting the radio access network device to implement its functions, such as a chip system, and this device can be installed in the radio access network device. In the embodiments of this application, the chip system can be composed of chips or can also include chips and other discrete devices.

[0104] A terminal device can also be referred to as a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), etc. The terminal device 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 autonomous 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. Embodiments of the present application do not limit the specific technologies and specific device forms adopted by the terminal device. Among them, the device for implementing the terminal device can be the terminal device or a device capable of supporting the terminal device to realize its functions, such as a chip system, and this device can be installed in the terminal device.

[0105] The radio access network device and the terminal device can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on airplanes, balloons and satellites in the air. Embodiments of the present application do not limit the application scenarios of the radio access network device and the terminal device.

[0106] Embodiments of the present application can be applied to downlink signal transmission, can also be applied to uplink signal transmission, and can also be applied to device-to-device (D2D) signal transmission. For downlink signal transmission, the transmitting device is the radio access network device, and the corresponding receiving device is the terminal device. For uplink signal transmission, the transmitting device is the terminal device, and the corresponding receiving device is the radio access network device. For D2D signal transmission, the transmitting device is the terminal device, and the corresponding receiving device is also the terminal device. Embodiments of the present application do not limit the transmission direction of the signal.

[0107] The radio access network device and the terminal device can communicate through authorized spectrum, can also communicate through unlicensed spectrum, or can also communicate through authorized spectrum and unlicensed spectrum simultaneously. The radio access network device and the terminal device can communicate through spectrum below 6G, can also communicate through spectrum above 6G, or can also use spectrum below 6G and spectrum above 6G simultaneously. Embodiments of the present application do not limit the spectrum resources used between the radio access network device and the terminal device.

[0108] The following will be combined with Figure 2 , to illustrate the technical problems to be solved by the present application.

[0109] In Release 18 (R18) of the 3rd generation partnership project (3GPP), a low power wake up signal (LP-WUS) was introduced 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 can use the LP-WUR to monitor the LP-WUS and wake up the main receiver after receiving the LP-WUS to perform a paging process, a random access process, or to receive and transmit data, thereby achieving the purpose of energy saving.

[0110] Exemplarily, Figure 2 is a schematic diagram of the working process of the low power wake up receiver. As Figure 2 shown, the terminal device includes a main receiver and an LP-WUR. A network device (such as a radio access network device) can send signals such as NR signals and LP-WUS to the terminal device. The terminal device can use the main receiver to receive NR signals and use the LP-WUR to monitor the LP-WUS. The terminal device can set the main receiver to the off state or the deep sleep state before receiving the LP-WUS, and can wake up the main receiver to receive and transmit data (such as NR signals), perform a paging process, a random access process, etc. after receiving the LP-WUS, thereby achieving the purpose of energy saving. It should be noted that the LP-WUR is default to the on state.

[0111] It should be noted that before the terminal device receives the downlink signal, such as before the terminal device listens for the LP-WUS through the LP-WUR, or before the terminal device receives the NR signal through the primary receiver, it is necessary to achieve the synchronization of the terminal device itself, so as to achieve the synchronization performance of the terminal device for receiving other signals. For example, the primary receiver of the terminal device can be synchronized with the network device in terms of time and frequency through the primary synchronization signal (PSS) and the secondary synchronization signal (SSS) included in the synchronization signal / physical broadcast channel block (SSB), or the primary receiver of the terminal device can achieve the synchronization of the primary receiver itself through the SSB, or achieve the synchronization between the primary receiver and the local clock, or limit the time offset and / or frequency offset of the primary receiver within a certain range, or achieve that the primary receiver has no time offset or frequency offset.

[0112] However, in some usage scenarios, due to the low-power and simple design of the LP-WUR, the LP-WUR may not have the ability to process signals (such as signal decoding, complex convolution, etc.), so it may not be able to receive the SSB, thus unable to achieve the synchronization of the LP-WUR itself, and further unable to achieve the reception synchronization of the LP-WUS. Therefore, relevant technical personnel proposed to design a low-power synchronous signal (LP-SS) for the LP-WUR, so that the LP-WUR of the terminal device can achieve the synchronization performance of receiving other signals (such as LP-WUS) through the LP-SS, or in other words, the LP-WUR can achieve the reception synchronization of other signals (such as LP-WUS) through the LP-SS. As an example, the LP-SS can be a low-power synchronous signal based on on-off keying (OOK), or a low-power synchronous signal based on frequency shift keying (FSK), or a low-power synchronous signal based on orthogonal frequency-division multiplexing (OFDM), or a low-power synchronous signal based on the fusion of the above different modulation methods. The fusion scheme is, for example, the fusion of OOK and OFDM, or the fusion of FSK and OFDM, which is not limited here. Among them, OOK modulation can be understood as sending signals in some time-domain resources and not sending signals in some time-domain resources. 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 in the time-domain resources where OOK has signals. A feasible scheme is to use different sequences in the part where OOK has signals to distinguish different terminals, for example, using the Zadoff-Chu (ZC) sequence. This can increase the data rate of signal transmission and improve the signal detection performance at the same time. In some embodiments, the network device can send the LP-SS periodically. 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 synchronous signal. It should be understood that the LP-SS is only an example and not a limitation. For example, as long as the LP-WUR can achieve its own synchronization by receiving a certain signal, then this signal can be considered as the LP-SS. The LP-SS can also have other names, which are not limited here.

[0113] However, after introducing the LP-SS, how to determine the time-domain position and frequency-domain position of the LP-SS to achieve the reception of the LP-SS becomes an urgent problem to be solved.

[0114] In some other usage scenarios, the LP-WUR can receive the SSB, that is, the LP-WUR can achieve its own synchronization through the SSB, but cannot achieve the receive synchronization of the LP-WUS. For example, when the operating frequency point of the SSB is inconsistent with that of the LP-WUS, after the LP-WUR achieves its own synchronization through the SSB, it needs to switch the operating frequency point to the operating frequency point of the LP-WUS before it can monitor the LP-WUS and then achieve the receive synchronization of the LP-WUS. At this time, if the time-domain resources between the monitoring position of the SSB and the monitoring position of the LP-WUS are less than the frequency point switching duration of the LP-WUR, it will cause the LP-WUR to be unable to achieve the receive synchronization of the LP-WUS. Another example is that after the LP-WUR achieves its own synchronization through the SSB and then enters the sleep state, the LP-WUR needs to be awakened to monitor the LP-WUS. At this time, if the time-domain resources between the monitoring position of the SSB and the monitoring position of the LP-WUS are less than the wake-up delay of the LP-WUR, it will cause the LP-WUR to be unable to achieve the receive synchronization of the LP-WUS. Among them, the frequency point switching duration of the LP-WUR can be understood as the time required for the LP-WUR to switch the operating frequency point from the operating frequency point of the SSB to the operating frequency point of the LP-WUS; the wake-up delay of the LP-WUR can be the duration from when the LP-WUR enters the sleep state to when it is awakened to monitor the LP-WUS.

[0115] In view of 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 operating frequency point of the LP-SS can be designed to determine the frequency-domain position of the LP-SS, and by predefining the association relationship between the time-domain position of the SSB and the time-domain position of the LP-SS under the same beam index, the time-domain position of the LP-SS can be determined, so as to achieve the reception of the LP-SS, achieve the synchronization of the LP-WUR itself, and further achieve the synchronization performance of the LP-WUR for receiving other signals (such as the 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 point switching duration and / or the wake-up delay of the LP-WUR can be restricted, so that the LP-WUR can achieve the receive synchronization of the LP-WUS through the SSB.

[0116] The technical solution provided by the present application can be applied to power-sensitive devices and small devices, such as Internet of Things usage scenarios (such as industrial sensors, controllers), wearable devices, extended reality (XR) / smart glasses, smartphones or other application scenarios, and the present application does not make specific limitations thereto.

[0117] To facilitate the understanding of the technical solution provided by this application, first, a method for the primary receiver of a terminal device to determine the time domain position and frequency domain position of the SSB will be described.

[0118] As an example, a network device (such as a radio access network device) can periodically send SSBs so that the terminal device can ensure the synchronization performance of receiving other signals or channels at any time point. For example, the primary receiver of the terminal device can monitor and receive the SSB at the known transmission time of the fixed SSB according to its own needs to ensure the synchronization performance of receiving other signals or channels. For example, when the primary receiver of the terminal device performs cell search, it can monitor the SSB according to the operating frequency band supported by the operator and the terminal device to perform time-frequency synchronization. In the 5G NR communication system, to reduce the synchronization time of the terminal device, the concept of a synchronization raster is introduced so that the primary receiver of the terminal device can monitor the SSB based on the synchronization raster. The synchronization raster can indicate the frequency domain position SS REF ,SS REF corresponds one-to-one with the global synchronization channel number (GSCN), and each GSCN corresponds to the frequency domain position of an SSB. Among them, SS REF can also be referred to as the center frequency, monitoring position, or monitoring frequency point of the SSB. As an example, Table 1 shows a synchronization raster for monitoring SSBs.

[0119] Table 1: GSCN parameters for the global frequency raster

[0120]

[0121] Therefore, the terminal device can calculate the GSCN based on Table 1 to determine the monitoring position of the SSB, thereby achieving the reception of the SSB. For example, when GSCN = 2, it can be deduced that N = 1 and M = 1, so that the monitoring position of the SSB can be determined to be 1250 kHz. The terminal device can monitor whether there is an SSB at each determined monitoring position, thereby achieving the reception of the SSB. Among them, the value obtained by multiplying N and M can be referred to as the search step or search granularity. For example, the search step in the range of 24250 - 100000 MHz is 17.28 MHz.

[0122] In some embodiments, a network device may transmit multiple SSBs. Each SSB among the multiple SSBs may be transmitted via a beam in a specific direction. The multiple SSBs may be located within the same transmission period. There is a fixed pattern for the transmission moments / time domain positions of the SSBs transmitted via different beams. Depending on the different subcarrier spacings (SCSs), there are five different cases for the time domain positions of the SSBs transmitted via different beams, as shown in Table 2 below. It should be understood that the time domain position relationship of the SSBs transmitted via different beams can be determined through Table 2.

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

[0124]

[0125]

[0126] It should be noted that the five types in Table 2 are all for one transmission period. The transmission period is, for example, a half-frame. The start symbol index of the SSB can be understood as the index of the first symbol among the 4 symbols occupied by the SSB in the time domain. The symbol may be an orthogonal frequency division multiplexing (OFDM) symbol. L indicates the number of SSBs that can be transmitted within a half-frame, or the number of beams for transmitting SSBs within 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, a half-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 5 ms. A radio frame contains 10 subframes, and the length of each subframe is 1 ms. 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 15 kHz, a subframe is equal to one time slot; when the subcarrier spacing is 30 kHz, a subframe is equal to two time slots. A time slot may contain 14 OFDM symbols.

[0127] In case A: The subcarrier spacing is 15 kHz, and the starting symbol index of the SSB is {2, 8} + 14*n. When f <= 3 GHz, n = 0, 1. Among them, when n = 0, the starting symbol index of the SSB is {2, 8}; when n = 1, the starting symbol index of the SSB is {16, 22}. It can be seen that the SSB occupies 2 time slots in total, and there are 2 SSBs in 1 time slot, so L = 4. When 3 <= f <= 6 GHz, n = 0, 1, 2, 3. Among them, when n = 0, the starting symbol index of the SSB is {2, 8}; when n = 1, the starting symbol of the SSB is {16, 22}; when n = 2, the starting symbol index of the SSB is {30, 36}; when n = 3, the starting symbol index of the SSB is {44, 50}. It can be seen that the SSB occupies 4 time slots in total, and there are 2 SSBs in 1 time slot, L = 8.

[0128] In case B: The subcarrier spacing is 30 kHz, and the starting symbol index of the SSB is {4, 8, 16, 20} + 28*n. When f <= 3 GHz, n = 0. Among them, when n = 0, the starting symbol index of the SSB is {4, 8, 16, 20}. It can be seen that the SSB occupies 2 time slots in total, and there are 2 SSBs in 1 time slot, so L = 4. When 3 <= f <= 6 GHz, n = 0, 1. It can be determined that the SSB occupies 4 time slots in total, and there are 2 SSBs in 1 time slot, so L = 8.

[0129] In case C: The subcarrier spacing is 15 kHz, and the starting symbol index of the SSB is {2, 8} + 14*n. When f <= 3 GHz, n = 0, 1. It can be determined that the SSB occupies 2 time slots in total, and there are 2 SSBs in 1 time slot, so L = 4. When 3 <= f <= 6 GHz, n = 0, 1, 2, 3. It can be determined that the SSB occupies 4 time slots in total, and there are 2 SSBs in 1 time slot, so L = 8.

[0130] 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. Among them, there are 8 time slots in 1 subframe, and there are 2 SSBs in 1 time slot, so there are 16 SSBs in 1 subframe, a total of 4 groups, then L = 64.

[0131] In case E: The subcarrier spacing is 240 kHz, and the starting symbol index of the SSB is {8, 12, 16, 20, 32, 36, 40, 44} + 56 * n. When f > 6 GHz, n = 0, 1, 2, 3, 5, 6, 7, 8. Among them, 1 subframe contains 16 time slots, 1 time slot contains 2 SSBs, so a subframe contains 32 SSBs, a total of 2 groups, then L = 64.

[0132] Based on this, when the network device sends multiple SSBs, the primary receiver of the terminal device can monitor the first SSB, and after detecting 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 the SSBs transmitted by different beams in Table 2. For example, in case A, when f <= 3 GHz, the starting symbol index of the SSB is {2, 8} + 14 * n. If the starting symbol index of the first SSB is 2, then 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 primary receiver of the terminal device detects this SSB.

[0133] Next, in combination with Figures 3 to 9 , the technical solution provided by the embodiments of the present application will be described. This technical solution can be applied to scenarios where the LP-WUR cannot achieve its own synchronization through the SSB, and thus cannot achieve the reception synchronization of the LP-WUS.

[0134] Exemplarily, Figure 3 is an exemplary illustration diagram of a communication method provided by the embodiments of the present application. As Figure 3 shown, this method may include S301 and S302.

[0135] As an example, this method can be executed by the terminal device, or by a chip system, a hardware circuit, and / or a software module applied to the terminal device. The terminal device may include a primary receiver and an LP-WUR.

[0136] A possible implementation is: The terminal device includes a primary receiver, and the primary receiver can implement some or all of the functions of the LP-WUR. For example, the module for implementing the LP-WUR function may be included in the primary receiver. Another example is that the module included in the LP-WUR is a part of the template included in the primary receiver. Among them, when the terminal device is in a low-power state, the terminal device can turn on the LP-WUR.

[0137] One possible implementation is as follows: The terminal device includes a main receiver and a first receiver. The main receiver can implement some functions of the LP-WUR, and the first receiver can implement some functions of the LP-WUR. For example, the module for implementing the LP-WUR function can include a first part module and a second part module. The first part module can be included in the main receiver, and the second part module can be included in the first receiver. Another example is that the module in the LP-WUR includes a first part module and a second part module. The first part module is a part of the modules included in the main receiver, and the second part module is a part of the modules included in the first receiver. Among them, when the terminal device is in a low-power state, the terminal device can turn on the LP-WUR.

[0138] S301, determine the first synchronization grid.

[0139] As an example, the first synchronization grid can be understood as the synchronization grid used by the LP-WUR of the terminal device to receive the LP-SS. Or rather, 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 referred to as the center frequency, monitoring position, or monitoring frequency point of the LP-SS.

[0140] As an example, SS LP-REF can correspond one-to-one with the GSCN, and each GSCN corresponds to the frequency-domain position of an LP-SS.

[0141] As an example, the first synchronization grid can be predefined.

[0142] In one possible implementation, the first synchronization grid can be related to the second synchronization grid. The second synchronization grid is the synchronization grid used by the main receiver of the terminal device to receive the SSB. Or rather, the main receiver of the terminal device can determine the frequency-domain position SS of the SSB based on the second synchronization grid REF .

[0143] In this implementation, to avoid conflicts or collisions between the monitoring position SS of the SSB REF and the monitoring position SS of the LP-SS LP-REF , an offset can be set between SS REF and SS LP-REF . It should be noted that if the monitoring position SS of the LP-SS LP-REF is offset, to avoid a reduction in the number of LP-SS - REF, the frequency-domain range for the LP-WUR of the terminal device to monitor the LP-SS can be offset accordingly. As an example, the offset of the frequency-domain range can be the same as the offset between SS LP and SS REF and SSLP-REF The offset between them is the same. Among them, the offset can be predefined, set according to actual requirements, or configured by a signal, such as indicated by a system information block (SIB) or SIB1. This application does not make specific limitations on this.

[0144] As an example, Table 3 is an example of the first synchronization raster. The GSCN in different frequency domain ranges and the SS corresponding to the GSCN can be determined based on Table 3 LP-REF It should be understood that Table 3 is only an example and not a limitation.

[0145] Table 3: Parameters of the GSCN of the First Synchronization Raster

[0146]

[0147] In some embodiments, 0 - (3000 + offset) MHz in Table 3 can also be replaced by (0 + offset) - (3000 + offset) MHz, that is, offset - (3000 + offset) MHz.

[0148] It should be understood that the offset can be understood as the offset between the frequency domain position of the SSB determined according to the first synchronization raster and the frequency domain position of the LP - SS determined according to the second synchronization raster when the number of monitoring times is the same. The same number of monitoring times can be understood as the same GSCN, or in other words, the same values of M and N.

[0149] In another possible implementation manner, the first synchronization raster can be a newly designed synchronization raster.

[0150] As an example, different search step sizes can be designed for different frequency domain ranges according to the operating frequency band (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 within 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 LP-WUR of the terminal device can monitor the LP-SS with a probability greater than or equal to the probability threshold, and other frequency domain ranges can be understood as the frequency domain ranges in which the LP-WUR of the terminal device can monitor the LP-SS with a probability less than the probability threshold. The probability threshold can be set according to actual requirements and is not limited here. For example, most operators support operating frequency bands of 900 MHz and 1.8 GHz. To further reduce network overhead, LP-WUS may also support operating frequency bands of 900 MHz and / or 1.8 GHz. It should be noted that the LP-WUR of the terminal device monitoring the LP-SS within the frequency domain range can also be referred to as the LP-WUR of the terminal device searching for the LP-SS within the frequency domain range. Therefore, the first synchronization raster can be understood as the search rule for the LP-WUR of the terminal device to search for the LP-SS within the frequency domain range.

[0151] As an example, Table 4 is another example of the first synchronization raster. The GSCN within different frequency domain ranges and the SS corresponding to the GSCN can be determined based on Table 4. LP-REF It should be understood that Table 4 is only an example and not a limitation.

[0152] Table 4: Parameters of the GSCN of the first synchronization raster

[0153]

[0154] Taking the frequency from 0 to 3500 MHz as an example in Table 4, the frequency from 0 to 3500 MHz is divided into 4 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 the GSCN, rounding up or rounding to the nearest value can also be used, which is not specifically limited here. Among them, the value multiplied by N and M can be called the search step size or search granularity.

[0155] It can be seen that different search step sizes are used for different frequency domain ranges in Table 4. As an example, in the range of 0–500 MHz, the minimum search step size is 1000 kHz; in the range of 500–1000 MHz, the minimum search step size is 500 kHz; in the range of 1000–2500 MHz, the minimum search step size is 1000 kHz; in the range of 2500–3500 MHz, the minimum search step size is 500 kHz. It can be seen that the working frequency band 900 MHz that LP-WUS may support is included in the range of 500–1000 MHz. Compared with the frequency domain range of 0–500 MHz that does not include 900 MHz, the minimum search step size in the range of 500–1000 MHz is smaller than that in the range of 0–500 MHz. As can be seen from Table 4, the search step size corresponding to N is smaller than that corresponding to M. Therefore, the search step size corresponding to N can be called the minimum search step size. The search step size corresponding to N can be understood as the value multiplied by N.

[0156] In addition, as can be seen from Table 4, the higher the frequency domain range, the larger the value of the search step size, enabling the terminal device to quickly search for LP-SS and shorten the synchronization time. For example, the search step size in the range of 500–1000 MHz is smaller than that in the range of 1000–2500 MHz.

[0157] In some embodiments, since the working frequency band 1.8 GHz that LP-WUS may support is included in the range of 1000–2500 MHz, a smaller search step size can also be used in the range of 1000–2500 MHz. For example, the search step size corresponding to N can be 500 kHz.

[0158] S302, the low-power wake-up receiver of the terminal device monitors the first synchronization signal according to the first synchronization grid.

[0159] In this embodiment, the LP-WUR of the terminal device can traverse the values of N and M in different frequency domain ranges based on the first synchronization grid shown in Table 3 or Table 4 to determine the GSCN, and determine the SS corresponding to the GSCN LP-REF ; and monitor whether there is an LP-SS on the determined SS LP-REF If an 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. Among them, the frequency domain position in the first position can be called the first frequency domain position, and the time domain position in the first position can be called the first time domain position.

[0160] 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 and M = 3, GSCN = 3, SS LP-REF =(1350 + offset) kHz; when N = 1 and M = 5, GSCN = 4, SS LP-REF =(1450 + offset) kHz. It should be understood that SS LP-REF The number of SS is 26638. After the LP-WUR of the terminal device determines SS LP-REF it can then successively monitor whether there is an LP-SS on SS LP-REF For example, the LP-WUR of the terminal device can successively monitor whether there is an LP-SS at (1250 + offset) kHz, (1350 + offset) kHz, and (1450 + offset) kHz. If the LP-WUR detects an LP-SS at (1350 + offset) kHz, it can determine that the frequency-domain position of the LP-SS is (1350 + offset) kHz and the time-domain position of the LP-SS is the moment when the LP-SS is detected.

[0161] In some embodiments, after the LP-WUR of the terminal device detects an LP-SS, it can stop monitoring the LP-SS. For example, if the LP-WUR of the terminal device detects an LP-SS at (1350 + offset) kHz, there is no need to continue monitoring for the LP-SS at (1450 + offset) kHz to save power consumption.

[0162] It should be understood that the method by 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 implementation method of determining the time-frequency position of the LP-SS based on the first synchronization grid shown in Table 3, and will not be elaborated here.

[0163] In some embodiments, the frequency-domain position SS LP-REF of the LP-SS in Table 3 or Table 4 can be predefined by the protocol or pre-configured in the terminal device in advance, so that the LP-WUR of the terminal device does not need to calculate SS LP-REF but can directly monitor the LP-SS on the predefined or pre-configured SS LP-REF to save power consumption.

[0164] In this embodiment, in a scenario where the LP-WUR is started to monitor the LP-WUS, or the main receiver of the terminal device activates the LP-WUR to monitor the LP-WUS, but the LP-WUR cannot achieve downlink synchronization with the network device by receiving the SSB, and the LP-WUR needs to receive the LP-SS for synchronization and measurement, the method of this embodiment can be used to determine the frequency-domain position SS LP-REF of the LP-SS based on the first synchronization grid, and on the determined SSLP-REF Monitor the LP-SS above to determine the time domain position or frequency domain position of the LP-SS, realize the reception of the LP-SS, thereby realize the synchronization of the LP-WUR itself, and further realize the synchronization performance of the LP-WUR receiving other signals (such as LP-WUS). Among them, the operating frequency points of the main receiver and the LP-WUR may not be the same.

[0165] In some embodiments, after the LP-SS is monitored at the first position, the first frequency domain position can be further verified whether it is the frequency domain position of the LP-SS, so as to improve the accuracy of determining the time domain position and frequency domain position of the LP-SS.

[0166] As an example, if the first frequency domain position is an integer multiple of the subcarrier spacing, or rather the first frequency domain position is a position that is an integer multiple of the subcarrier spacing, then the first frequency domain position can be considered as the frequency domain position of the LP-SS. If the first frequency domain position is not an integer multiple of the subcarrier spacing, or rather the first frequency domain position is not a position that is an integer multiple of the subcarrier spacing, then the first frequency domain position can be considered not to be the frequency domain position of the LP-SS, and the LP-WUR of the terminal device still needs to monitor the LP-SS at the next frequency domain position. For example, if the subcarrier spacing is 15 kHz, when the first frequency domain position is 2115850 kHz or 2115650 kHz, since 2115850 kHz or 2115650 kHz is not an integer multiple of 15 kHz, so this frequency domain position is not the frequency domain position of the LP-SS. If the first frequency domain position is 2115750 kHz, since 2115750 kHz is an integer multiple of 15 kHz, so this frequency domain position can be the frequency domain position of the LP-SS.

[0167] In some embodiments, the first frequency domain position being an integer multiple of the subcarrier spacing can also be understood as starting from a 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 the preset frequency point position. The preset frequency domain position can be set according to actual needs, and the present application does not make specific limitations on this.

[0168] As an example, the preset frequency domain position can be the initial frequency domain position. It should be noted that from the perspective of the system bandwidth of the communication system, there is an initial frequency domain position of the frequency domain resources for the entire communication system's communication bandwidth. As an example, the preset frequency domain position can be a frequency domain position with a preset offset from the initial frequency domain position. The preset offset can be set according to actual needs, and the present application does not make specific limitations on this.

[0169] In some embodiments, the operating frequency band of the terminal device is related to the frequency-domain position of the LP-SS. For example, the operating frequency band of the terminal device can be determined by monitoring the monitoring position of the LP-SS. Alternatively, the operating frequency band of the terminal device can be the frequency-domain position of the LP-SS. Among them, the operating frequency band of the terminal device can be the operating frequency band of the LP-WUR. The operating frequency band can also be referred to as the operating frequency point, the operating center frequency point, the operating frequency range, the frequency-domain unit, or the center frequency point.

[0170] In a possible implementation, the network device can send multiple LP-SSs, and each LP-SS among the multiple LP-SSs can be transmitted through a beam in a specific direction. For example, the network device can send multiple beams in specific directions at the same frequency-domain position but different time-domain positions, and each beam in the multiple beams in specific directions transmits one LP-SS. 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 satisfy a first preset relationship.

[0171] As an example, multiple modes (patterns) or mode types (pattern formats) can be set for the time-domain positions of the LP-SSs transmitted by different beams. For example, for different subcarrier spacings and / or frequency-domain ranges, multiple modes or mode types are set for the time-domain positions of the LP-SSs transmitted by different beams.

[0172] As an example, each mode or mode type set for the time-domain positions of the LP-SSs transmitted by different beams can be for one transmission period. For example, multiple LP-SSs can be located within the same transmission period, and the transmission period can be a half-frame.

[0173] As an example, in each mode or mode type, the number of resources separated between the time-domain positions of the LP-SSs transmitted by different beams can 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, if the number of resources separated between the time-domain positions of the LP-SSs transmitted by different beams is set as 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 can be an integer multiple of A, or F can be an integer multiple of B, or F can be an integer multiple of the difference between A and B, or F can be an integer multiple of the sum of A and B, or F can be the sum of an integer multiple of A and B, or F can be the sum of an integer multiple of B and A, which is not specifically limited here. As an example, the number of resources separated between the time-domain positions of the LP-SSs transmitted by different beams can be the number of resources separated between the starting symbol indices of the LP-SSs transmitted by different beams. The starting symbol index of the LP-SS can be understood as the index of the first symbol among the symbols occupied by the LP-SS in the time domain.

[0174] As an example, the resource can be a time-domain resource or a time-domain unit. The time-domain resource is, for example, a system frame, a sub-frame, a second, a millisecond, a time slot, a symbol, a mini time slot, etc., which are not limited herein.

[0175] As an example, the number of resources occupied by the LP-SS in the time domain can be related to the modulation method of the LP-SS.

[0176] As an example, the number of symbols occupied by the LP-SS in the time domain can be a positive integer, such as 1, 2, 4, 6, or 8, which is not specifically limited herein.

[0177] As an example, the first preset relationship can be related to the subcarrier spacing and / or the operating frequency band of the terminal device.

[0178] As an example, the first preset relationship can be predefined by a protocol or pre-configured in the terminal device in advance, which is not limited herein. For example, the first preset relationship can be pre-configured in the LP-WUR, the main receiver, or other storage devices of the terminal device, which is not limited herein.

[0179] As an example, the time-domain positions of the LP-SSs transmitted by different beams can be continuous or discrete, which is not specifically limited herein.

[0180] As an example, the same or different numbers of beams can be set for each mode or mode type. The number of beams can be understood as the number of LP-SSs that can be transmitted within a transmission period or the number of beams for transmitting the LP-SS.

[0181] As an example, the mode or mode type set for the time-domain positions of the LP-SSs transmitted by different beams can be related to the mode of the time-domain positions of the SSBs transmitted by different beams shown in Table 2. For example, the number of LP-SSs that can be transmitted within a transmission period can be the same as the number of SSBs that can be transmitted within a transmission period shown in Table 2. In Table 2, L indicates the number of SSBs that can be transmitted within a transmission period.

[0182] In this implementation manner, when the network device transmits multiple LP-SSs, the terminal device can Figure 3 determine the time-frequency position of the first LP-SS based on the method in

[0183] and determine the time-frequency positions of other LP-SSs based on the position of the first LP-SS and the first preset relationship. Among them, the time-frequency position can be understood as the abbreviation of the time-domain position and the frequency-domain position.

[0184] In this implementation, the network device can send multiple LP-SSs or multiple SSBs. The beams used by the network device to send multiple LP-SSs can be the same as those used to send multiple SSBs. Therefore, the second preset relationship can be predefined between the time domain positions of the LP-SSs transmitted by the beams with the same index and the time domain positions of the SSBs, so that the terminal device can determine the time-frequency positions of the SSBs transmitted by the beams with the same index based on the time-frequency positions of the LP-SSs, or determine the time-frequency positions of the LP-SSs transmitted by the beams with the same index based on the time-frequency positions of the SSBs. Among them, the second preset relationship is satisfied between the time domain positions of the LP-SSs transmitted by the beams with the same index and the time domain positions of the SSBs, which can be understood as that when the LP-SSs and SSBs are transmitted at different time domain positions by the beams with the same index, the second preset relationship is satisfied between the time domain positions of the LP-SSs and the time domain positions of the SSBs. For example, when the LP-SSs and SSBs are transmitted at different time domain positions by the beam with index 1, the second preset relationship is satisfied between the time domain positions of the LP-SSs and the time domain positions of the SSBs. In some embodiments, the index of the beam can also be replaced by the direction of the beam. For example, when the LP-SSs and SSBs are transmitted at different time domain positions by the beam in the first direction, the second preset relationship is satisfied between the time domain positions of the LP-SSs and the time domain positions of the SSBs. The second preset relationship is satisfied between the time domain positions of the LP-SSs transmitted by the beams with the same index and the time domain positions of the SSBs, which can also be referred to as the second preset relationship is satisfied between the time domain positions of the LP-SSs and the time domain positions of the SSBs transmitted by the beams with the same beam index.

[0185] As an example, the second preset relationship is satisfied between the time domain positions of the LP-SSs and the time domain positions of the SSBs transmitted by the beams with the same beam index, which can be understood as that the number of resources separated between the time domain positions of the LP-SSs and the time domain positions of the SSBs transmitted by the beams with the same beam index can have a second preset relationship with the number of resources occupied by the LP-SSs in the time domain and / or the number of resources occupied by the SSBs in the time domain. For example, if the number of resources separated between the time domain position of the LP-SS and the time domain position of the SSB transmitted by the beam 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, which is not specifically limited herein. As an example, the number of resources separated between the time domain position of the LP-SS and the time domain position of the SSB transmitted by the beam with the same beam index can be the number of resources separated between the starting symbol index of the LP-SS and the starting symbol index of the SSB transmitted by the beam with the same beam index.

[0186] It should be understood that the number of resources between the time domain positions of the LP-SS and 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. It can also be said that the number of resources 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. Among them, the number of resources between the time domain position of the SSB and the time domain position of the LP-SS transmitted with the same beam index can be the number of resources between the starting symbol index of the SSB and the starting symbol index of the LP-SS transmitted with the same beam index.

[0187] As an example, the second preset relationship can be predefined by the protocol or pre-configured in the terminal device in advance, which is not limited here. For example, the second preset relationship can be pre-configured in the LP-WUR, the main receiver or other storage devices of the terminal device, which is not limited here.

[0188] Therefore, when the network device sends multiple LP-SSs, the LP-WUR of the terminal device can be based on Figure 3 the method in to determine the time-frequency position of the first LP-SS, 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 positions of the SSBs without monitoring the SSBs, thereby saving power consumption. Or, after the LP-WUR of the terminal device determines the time-frequency position of the first LP-SS based on Figure 3 the method in, 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, so that the main receiver can determine the time-frequency positions of the SSBs without monitoring the SSBs, thereby saving power consumption. It should be noted that it can be considered that the beam indices for transmitting the first SSB and the first LP-SS are the same.

[0189] Correspondingly, after the master 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 positions of LP-SSs without monitoring LP-SSs, thereby saving power consumption. Alternatively, after the master receiver determines the time-frequency position of the first SSB, it 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, so that the LP-WUR can determine the time-frequency positions of LP-SSs without monitoring LP-SSs, thereby saving power consumption.

[0190] In some embodiments, after the master 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.

[0191] Correspondingly, 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 master receiver. The third preset relationship can be understood as the time-domain position relationship of SSBs transmitted by different beams shown in Table 2.

[0192] In some embodiments, the master 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 positions of LP-SSs 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 positions of all LP-SSs.

[0193] Correspondingly, after determining 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 and the first preset relationship, and send the time-frequency positions of all LP-SSs to the master receiver, so that the master receiver can determine the time-frequency positions of the SSBs transmitted with the same beam index based on the time-domain positions of each LP-SS and the second preset relationship, and further determine the time-frequency positions of all SSBs.

[0194] In the embodiments of the present application, the master receiver can be started first, and then the LP-WUR can be started. The master receiver can 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 can determine the time-frequency position of the LP-SS. Alternatively, the LP-WUR can be started first, and then the master receiver can be started. The LP-WUR can send the time-frequency position of the LP-SS and / or the time-frequency position of the SSB to the master receiver, so that the master receiver can determine the time-frequency position of the SSB. In the embodiments of the present application.

[0195] In a possible implementation, the LP-SS and the SSB can share the same time-domain resource, or in other words, the LP-SS can be transmitted on the time-domain resource configured for the SSB. For example, when the pattern format of the SSB is case A, the time-domain resource configured for the SSB includes 70 symbols with indexes from 0 to 69, but the SSB can occupy at most 32 of the 70 symbols. Therefore, the LP-SS can be transmitted in the remaining 38 symbols. Therefore, the time-domain positions of the LP-SSs transmitted by different beams can be located in these 38 symbols.

[0196] 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 following combines Figures 4 to 9 , and makes an exemplary description of the starting symbol index of the LP-SS. As an example, Figures 4 to 9 In, it is set that the network device sends the LP-SS and the SSB through the beams in 4 specific directions within one transmission period. The time-domain positions of the SSBs transmitted by the beams in the 4 specific directions are as shown by the black shaded blocks in Figures 4 to 9 , and the time-domain positions of the LP-SSs transmitted by the beams in the 4 specific directions are as shown by the slant shaded blocks in Figures 4 to 9 .

[0197] As an example, Figures 4 to 7 the LP-SS occupies 2 symbols in the time domain.

[0198] Figure 4 is a schematic diagram for explaining the time-domain position of a synchronization signal provided by an embodiment of the present application. Figure 4The pattern format of the SSB is case B, and f <= 3 GHz.

[0199] As Figure 4 shown, the starting symbol index of the SSB is: {4, 8, 16, 20} + 28 * n, n = 0, and the starting symbol index of the LP-SS transmitted with the same beam index can be {2, 12, 14, 24} + 28 * n, n = 0. It can be seen that if the starting symbol index of the SSB transmitted by the beam with index 1 is 4 and the starting symbol index of the LP-SS transmitted with the same beam index is 2, 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. Among them, 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 positions of the SSB and the LP-SS transmitted with the same beam index.

[0200] Figure 5 It is a schematic illustration of the time domain position of a synchronization signal provided by another embodiment of the present application. Figure 5 The pattern format of the SSB is case B, and f <= 3 GHz.

[0201] As Figure 5 shown, the starting symbol index of the SSB is: {4, 8, 16, 20} + 28 * n, n = 0, and the starting symbol index of the LP-SS transmitted with the same beam index can be {12, 14, 24, 26} + 28 * n, n = 0. As an example, the SSB and LP-SS located within the dashed box in Figure 5 can be considered as synchronization signals transmitted by the same index beam. It can be seen that the starting symbol index of the SSB is 4 and the starting symbol index of the LP-SS is 12, so 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.

[0202] Figure 6 It is a schematic illustration of the time domain position of a synchronization signal provided by another embodiment of the present application. Figure 6 The pattern format of the SSB is case C, and f <= 3 GHz.

[0203] As Figure 6As shown, 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. 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.

[0204] As an example, when 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 also be {0, 12} + 14 * n, where n = 0, 1.

[0205] Figure 7 This is a schematic diagram showing the time domain position of a synchronization signal provided for another embodiment of this application. Figure 7 In it, the pattern format of the SSB is case C, and f <= 3 GHz.

[0206] As Figure 7 As shown, 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. 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 SSB in the time domain.

[0207] As an example, Figure 8 In it, the LP-SS occupies 1 symbol in the time domain. Figure 8 This is a schematic diagram showing the time domain position of a synchronization signal provided for another embodiment of this application. Figure 8 In it, the pattern format of the SSB is case C, and f <= 3 GHz.

[0208] As Figure 8 As shown, 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. 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.

[0209] As an example, Figure 9 In the LP-SS, it occupies 4 symbols in the time domain. Figure 9 It is a schematic illustration of the time-domain position of a synchronization signal provided for another embodiment of the present application. Figure 9 In the SSB, the pattern format is caseB, and f <= 3 GHz.

[0210] Such as Figure 9 As shown, the starting symbol index of the SSB is: {4, 8, 16, 20} + 28*n, n = 0. The starting symbol index of the LP-SS transmitted with the same beam index can be {0, 12, 24, 28} + 28*n, n = 0. As an example, the Figure 9 SSB and LP-SS located within the dashed box in can be considered as synchronization signals transmitted by the same-index beam. It can be seen that the starting symbol index of the SSB is 16 and the starting symbol index of the LP-SS is 24. 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 twice the number of symbols occupied by the SSB in the time domain.

[0211] It should be understood that the second preset relationship in other pattern types can be determined based on the method for determining the second preset relationship shown in Figures 4 to 9 , and will not be elaborated here. The second preset relationship is the relationship between the time-domain positions of the SSB and the LP-SS transmitted by the same-index beam.

[0212] In a possible implementation, the Figures 4 to 9The starting symbol index of LP-SS in different pattern formats shown in is used as the indication information of the first preset relationship. For example, the time-domain position relationship of LP-SS for different beam transmissions in the scenario of pattern format being 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. Another example is that the time-domain position relationship of LP-SS for different beam transmissions in the scenario of pattern format being 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 formats are for one transmission period (such as a half-frame). In some embodiments, n can be a positive integer greater than or equal to 0.

[0213] Taking the pattern format as case B, f <= 3 GHz, and the time-domain position of LP-SS being {2, 12, 14, 24} + 28 * n, 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 LP-SS to the fourth LP-SS are 12, 14, and 24 respectively. It can be seen that the number of symbols between the time-domain positions of the first LP-SS and the second LP-SS is the sum of twice the number of symbols occupied by SSB in the time domain and the number of symbols occupied by LP-SS in the time domain; the number of symbols between the time-domain positions of the second LP-SS and the third LP-SS is the number of symbols occupied by LP-SS in the time domain; the number of symbols between the time-domain positions of the third LP-SS and the fourth LP-SS is the sum of twice the number of symbols occupied by SSB in the time domain and the number of symbols occupied by LP-SS in the time domain. Among them, the number of symbols between the starting symbol indexes of LP-SS for different beam transmissions can also be referred to as the number of symbols between the time-domain positions of LP-SS for different beam transmissions.

[0214] It should be understood that Figures 4 to 9 Based on the method for determining the starting symbol index of LP-SS in different pattern formats shown in , the starting symbol index of LP-SS in other pattern formats can be determined, which will not be elaborated here.

[0215] 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 pre-defined by the protocol or configured in the terminal device in a pre-configured manner in advance, so that the LP-WUR or the main receiver of the terminal device can determine the time domain positions of other LP-SSs after determining the time domain position of the first LP-SS, saving power consumption.

[0216] In some implementation manners, if the LP-WUR can receive the SSB, the LP-WUR can achieve the reception synchronization of the LP-WUS through the SSB by restricting 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 point switching duration of the LP-WUR and / or the wake-up delay of the LP-WUR.

[0217] As an example, the fourth position can be determined according to the third position. 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 the LP-WUR and / or the frequency point switching duration of the LP-WUR. The third position is the resource position where the LP-WUR monitors the SSB, and the fourth position is the resource position where the LP-WUR monitors the LP-WUS.

[0218] As an example, the third position can 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 can 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.

[0219] As an example, the network device can send multiple SSBs within the same transmission period. Correspondingly, the LP-WUR needs to receive multiple SSBs. In this example, the third position can be the monitoring position of the last SSB that the LP-WUR needs to monitor / receive to meet the synchronization performance of the LP-WUR itself.

[0220] In one possible implementation, the operating frequency point of the SSB may be different from that of the LP-WUS. In this implementation, the time domain resources 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 point switching duration of the LP-WUR. As an example, the LP-WUR of the terminal device may monitor the SSB at the operating frequency point of the SSB, and after achieving its own synchronization through the SSB, the LP-WUR may switch its operating frequency point to the operating frequency point of the LP-WUS, so as to monitor the LP-WUS. It should be understood that the frequency point switching duration of the LP-WUR may be understood as the duration for the LP-WUR to switch its operating frequency point. For example, the frequency point switching duration of the LP-WUR may be understood as the time required for the LP-WUR to switch its operating frequency point from the operating frequency point of the SSB to the operating frequency point of the LP-WUS. The frequency point switching duration may also be referred to as the frequency point switching delay, which is not specifically limited herein.

[0221] As an example, when the LP-WUR remains in the on state after achieving its own synchronization through the SSB, the time domain resources 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 frequency point switching duration of the LP-WUR. For example, the time domain resources between the time domain position in the third position and the time domain position in the fourth position may be greater than or equal to the frequency point switching duration of the LP-WUR, or the frequency point switching duration of the LP-WUR may be less than the time domain resources between the time domain position in the third position and the time domain position in the fourth position.

[0222] As an example, when the LP-WUR enters the sleep state after achieving its own synchronization through the SSB, and is awakened to monitor the LP-WUS after maintaining the sleep state for a period of time, the time domain resources 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 point switching duration of the LP-WUR. For example, the time domain resources 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. Another example is that the time domain resources 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 point switching duration of the LP-WUR. It should be understood that the wake-up delay of the LP-WUR may be the duration from when the LP-WUR enters the sleep state to when it is awakened to monitor the LP-WUS.

[0223] In an implementable manner, the operating frequency point of the SSB can be the same as that of the LP-WUS. In this implementation manner, the time-domain resources 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.

[0224] As an example, after the LP-WUR achieves its own synchronization through the SSB and enters the sleep state, and remains in the sleep state for a period of time and then is awakened to monitor the LP-WUS, the time-domain resources 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 resources 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.

[0225] In this implementation manner, the LP-WUR of the terminal device can achieve its own synchronization by receiving the SSB, and can monitor the LP-WUS at the monitoring position of the LP-WUS determined based on the third position, so as to achieve the reception of the LP-WUS. This implementation manner enables the LP-WUR to achieve reception synchronization of the LP-WUS through the SSB. It should be understood that the monitoring position of the LP-WUS is the fourth position where the LP-WUR monitors the LP-WUS.

[0226] In some implementation manners, the fourth position can be determined first, and the third position can be determined according to the fourth position. For example, the fourth position where the LP-WUR monitors the LP-WUS can be determined based on the paging occasion (PO), and the third position where the LP-WUR monitors or receives the third synchronization signal (such as the SSB) can be determined based on the determined fourth position and the fourth preset relationship. Among them, the time-domain resources between the time-domain position in the fourth position and the time-domain position in the third position have a fourth preset relationship with the wake-up delay of the LP-WUR and / or the frequency point switching duration of the LP-WUR. It should be understood that the manner of determining the third position based on the fourth position and the fourth preset relationship can refer to the above-mentioned manner of determining the fourth position based on the third position and the fourth preset relationship, and will not be elaborated here.

[0227] In some implementation manners, the time-domain resources between the time-domain position in the fourth position and the time-domain position in the fifth position may have a fifth preset relationship with at least one of the following information: the wake-up delay of the primary receiver, the synchronization delay of the primary receiver, or the frequency point switching duration of the primary receiver. The fifth position is the resource position where the primary receiver of the terminal device monitors or listens to the paging message. For example, the fifth position can be the resource position where the primary receiver of the terminal device monitors or listens to the paging message on the PO.

[0228] As an example, after the LP-WUR of the terminal device detects the LP-WUS, it can wake up the main receiver. If the main receiver has achieved its own synchronization, the main receiver can, after being woken up, monitor the paging message at the monitoring position of the paging message indicated by the legacy or default method to determine whether the terminal device is paged. In this example, there is a fifth preset relationship between the time-domain resources separated by 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 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 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 duration 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.

[0229] It should be noted that the LP-WUS can carry a UE group identifier to indicate that there is a terminal device in the corresponding terminal device group of the UE group identifier that is paged, but it cannot indicate which specific terminal device in the terminal device group is paged. The legacy paging message can contain UE identifier information to indicate the specific terminal device that is paged. Therefore, after receiving the LP-WUS, the terminal device can determine whether it is paged through the legacy paging message.

[0230] As an example, after the LP-WUR of the terminal device detects the LP-WUS, it can wake up the main receiver. If the main receiver has not achieved its own synchronization, after being woken up, the main receiver needs to first achieve its own synchronization through the SSB, and then monitor the paging message at the monitoring position of the paging message indicated by the legacy or default method to determine whether the terminal device is paged. In this example, there is a fifth preset relationship between the time-domain resources separated by 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 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 duration required for the main receiver to achieve its own synchronization.

[0231] As an example, when the main receiver of the terminal device can implement some or all of the functions of the LP-WUR, for example, when the main receiver can implement the reception synchronization of the LP-WUS, if the operating frequency point of the LP-WUS is inconsistent with the operating frequency point of the paging message, after the main receiver implements the reception synchronization of the LP-WUS at the operating frequency point of the LP-WUS, it can switch the operating frequency point to the operating frequency point of the paging message, so as to monitor the paging message. In this example, the time domain resources between the time domain position in the fourth position and the time domain position in the fifth position may have a fifth preset relationship with the frequency point switching duration of the main receiver. For example, the time domain resources between the time domain position in the fourth position and the time domain position in the fifth position may be greater than the frequency point switching duration of the main receiver. The frequency point switching duration of the main receiver can be understood as the time required for the main receiver to switch the operating frequency point from the operating frequency point of the LP-WUS to the operating frequency point of the paging message.

[0232] It should be understood that to ensure that the LP-WUR can implement the reception synchronization of the LP-WUS through the LP-SS, the operating frequency point of the LP-SS can be made consistent with the operating frequency point of the LP-WUS, or the relationship between the time domain resources between the monitoring positions of the LP-SS and the LP-WUS and the frequency point switching duration and / or the wake-up delay of the LP-WUR can be restricted. The present application does not limit this.

[0233] Figure 10 This is a schematic structural diagram of a communication device provided by an embodiment of the present application. As Figure 10 shown, the device 1000 may include a processing module 1010.

[0234] As an example, the device 1000 may be used to implement Figure 3 the method implemented by the terminal device in. For example, the processing module 1010 may be used to implement S301 and S302.

[0235] It should be understood that the device 1000 is embodied in the form of a functional module here. 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 of processors, etc.) for executing one or more software or firmware programs, and a memory, a combined logic circuit and / or other suitable components that support the described functions. In an alternative example, those skilled in the art can understand that the device 1000 may specifically be the terminal device in the above embodiment, and the device 1000 may be used to execute the respective processes and / or steps corresponding to the terminal device in the above method embodiment, or the device 1000 may be used to implement the respective steps / operations executed by the terminal device in the above method embodiment. To avoid repetition, it will not be elaborated here.

[0236] In an embodiment of the present application, the apparatus 1000 has functions to implement 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, the apparatus 1000 can also be a chip or a chip system, such as: a system on chip (SoC).

[0237] Figure 11 It is a schematic structural diagram of a communication apparatus provided in another embodiment of the present application. Figure 11 The illustrated apparatus 1100 can be used to implement the method performed by the terminal device in the above method embodiment.

[0238] 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. Among them, the memory 1110, the processor 1120, and the communication interface 1130 are communicatively connected to each other through the bus 1140.

[0239] The memory 1110 can be a read only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 1110 can store a program. When the program stored in the memory 1110 is executed by the processor 1120, the processor 1120 is used to execute each step / operation performed by the terminal device in the above method embodiment.

[0240] 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, and is used to execute relevant programs to implement the communication method shown in the method embodiment of the present application.

[0241] The processor 1120 can also be an integrated circuit chip with signal processing capabilities. During implementation, each step of the communication method shown in the method embodiment of the present application can be completed by the integrated logic circuit in the hardware of the processor 1120 or by instructions in software form.

[0242] The above-mentioned 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. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor, or the processor may also be any conventional processor, etc.

[0243] The steps of the method disclosed in combination with the embodiments of the present application can be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in a mature storage medium 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. This storage medium is located in the memory 1110, and the processor 1120 reads the information in the memory 1110 and combines its hardware to complete the functions required to be executed by the units included in the communication device of the present application. For example, it can execute each step / function performed by the terminal device in the above method embodiments.

[0244] Optionally, the memory 1110 and the processor 1120 may be integrated together.

[0245] The communication interface 1130 may use, but is not limited to, a transceiver device such as a transceiver to implement communication between the device 1100 and other devices or apparatuses.

[0246] The bus 1140 may include a path for transmitting information between various components of the device 1100 (for example, the memory 1110, the processor 1120, the communication interface 1130).

[0247] In some embodiments of the present application, a computer program product is also provided. When the computer program product runs on a processor, it can implement the methods shown in the foregoing embodiments. In some embodiments of the present application, a computer-readable storage medium is also provided. The computer-readable storage medium contains computer instructions, and when the computer instructions run on a processor, they can implement the methods shown in the foregoing embodiments.

[0248] 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. For example: one or more application specific integrated circuits (ASICs), or, one or more digital signal processors (DSPs), or, one or more field programmable gate arrays (FPGAs), etc. Again, when a certain module above is implemented in the form of a processing element calling program code, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processors that can call program code, such as a controller. Again, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0249] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, software modules, or any combination thereof. When implemented using software, 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 processes or functions according to the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wirelessly (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that the computer can access or a data storage device such as a server or data center that includes one or more integrated available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)), etc.

[0250] It can be understood that the various numerical numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0251] It should be understood that, in the embodiments of the present application, the sequence numbers of the above processes do not indicate the order of execution, and 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: Determine a first synchronization raster; The low-power wake-up receiver of the terminal device monitors a first synchronization signal according to the first synchronization raster.

2. The method according to claim 1, characterized in that The method further includes: When the first synchronization signal is monitored according to the first synchronization raster, determine a second position for receiving a second synchronization signal according to a first position, where the first position is the resource position where the low-power wake-up receiver monitors the first synchronization signal according to the first synchronization raster, and 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 signal 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, wherein The number of resources between the time-domain position in the first position and the time-domain position in the second position has a first preset relationship with 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 an SSB, the main receiver of the terminal device monitors the SSB according to a second synchronization raster, and when the number of monitoring times is the same, there is an offset between the monitoring position determined according to the first synchronization raster and the monitoring position determined according to the second synchronization raster.

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 position, where the first resource position is the resource position where the main receiver of the terminal device monitors the synchronization signal block SSB; Determine a second resource position for the low-power wake-up receiver of the terminal device to receive a first synchronization signal according to the first resource position.

7. The method according to claim 6, wherein The number of resources between the time-domain position in the first resource position and the time-domain position in the second resource position has a second preset relationship with 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.

8. The method according to claim 6 or 7, characterized in that, The method further includes: Determine a third resource position according to the second resource position, where the number of resources between the time-domain position in the third resource position and the time-domain position in the second resource position has a third preset relationship with 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, and the third resource position is the resource position where the low-power wake-up receiver receives a second synchronization signal, and the first synchronization signal and the second synchronization signal are the same type of synchronization signal with different beam directions.

9. A communication device, characterized in that, Includes 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, Includes: A processor, the processor is coupled to a memory, and the memory is used to store a computer program. When the processor calls the computer program, the device executes 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, Comprising computer program code which, when run 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 program code for execution by a computer, the program code including instructions for performing the method according to any one of claims 1 to 5 or any one of claims 6 to 8.

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