Method for sending low power wake-up signals, method for receiving low power wake-up signals, and related apparatus

Abstract

The present application relates to the technical field of communications. Provided are a method for sending low power wake-up signals, a method for receiving low power wake-up signals, and a related apparatus. In the method, a network device may generate low power wake-up signals (LPWUSs) on the basis of first information, wherein the first information is configured to scramble information bits of the LPWUSs, and / or, the first information is configured to determine carrying positions of superposition sequences in the LPWUSs, and the superposition sequences are configured to carry the information bits of the LPWUSs; subsequently, the network device may send the LPWUSs to a terminal; and correspondingly, the terminal can receive the LPWUSs on the basis of the first information. In this way, LPWUSs generated on the basis of scrambled information bits are distributed more evenly in the time domain and the frequency domain, thereby preventing as much as possible different LPWUSs from using the same or similar time-frequency resources; moreover, different LPWUSs are prevented as much as possible from using the same position to carry superposition sequences, thereby helping to reduce interference to adjacent cells.

Description

A method for transmitting and receiving a low-power wake-up signal, and related apparatus. This application claims priority to Chinese Patent Application No. 202510390373.2, filed on March 28, 2025, entitled "A method for transmitting, receiving and related devices for low-power wake-up signals", the entire contents of which are incorporated herein by reference. Technical Field This application relates to the field of communication technology, and in particular to a method for transmitting a low-power wake-up signal, a method for receiving a low-power wake-up signal, and related apparatus. Background Technology To reduce power consumption, terminal devices (hereinafter referred to as terminals) typically employ a low-power wake-up mechanism. A terminal consists of a main communication unit and a wake-up receiver unit, with the main communication unit consuming significantly more power than the wake-up receiver unit. Under the low-power wake-up mechanism, the terminal usually shuts down the main communication unit, while the wake-up receiver unit continuously monitors for a low-power wake-up signal (LPWUS). When the network side (also known as network equipment) needs to establish a communication connection with the terminal for service transmission and reception, the network side can send an LPWUS signal to the terminal. Upon detecting a valid LPWUS signal, the wake-up receiver unit can trigger the main communication unit to start, thereby establishing a communication connection between the terminal and the network side, and ultimately enabling service transmission and reception. In related technologies, the network side can send LPWUS to terminals within its covered cells. However, different LPWUS from different cells may use the same or similar time-frequency resources, which can easily cause interference to neighboring cells. For example, if terminal 1 belongs to cell 1, and cell 1 and cell 2 are neighboring cells, the LPWUS sent by the network side to cell 2 may interfere with cell 1. This could cause terminal 1 to misreceive or misinterpret cell 2's LPWUS, or even prevent terminal 1 from receiving cell 1's LPWUS normally, thus preventing terminal 1 from being properly woken up. Summary of the Invention To address the aforementioned issues, this application provides a method for transmitting a low-power wake-up signal, a method for receiving a low-power wake-up signal, and related apparatus, with the aim of minimizing interference from the transmitted LPWUS signal to neighboring cells. Firstly, this application provides a method for transmitting a low-power wake-up signal, applied to network devices such as base stations. In this method, the network device generates a low-power wake-up signal (LPWUS) based on first information; wherein the first information can be used to scramble the information bits of the LPWUS, for example, the first information can scramble the information bits to make adjacent bit 0 or adjacent bit 1 more dispersed; and / or, the first information can be used to determine the carrying position of the superimposed sequence in the LPWUS, the superimposed sequence being used to carry the information bits of the LPWUS, for example, the carrying position of the superimposed sequence in the LPWUS can be determined based on the first cell to which the terminal belongs; subsequently, the network device transmits the LPWUS to the terminal. Thus, on the one hand, using the first information can scramble the information bits of the LPWUS, which helps to make the LPWUS generated based on the scrambled information bits more evenly distributed in the time and frequency domains, thereby reducing the possibility that the LPWUS uses the same or similar time and frequency resources as other LPWUS, and reducing the interference of the LPWUS to neighboring cells. On the other hand, using the first information can be used to determine the bearer position of the bearer overlay sequence in the generated LPWUS. For the LPWUS sent by the terminal, the determined bearer position can be used to carry the overlay sequence, which helps to reduce the possibility that the LPWUS uses the same bearer position to carry the overlay sequence as other LPWUS, and avoids the possibility that the LPWUS completely overlaps with other LPWUS, thereby reducing the interference of the LPWUS to neighboring cells. In one possible implementation, when the first information is used to scramble the information bits of the LPWUS, the first information may include a first sequence. The first sequence can be used to scramble the information bits of the LPWUS, for example, by performing an XOR operation. Exemplarily, the first sequence may be a PSS sequence, an LPSS sequence, or a predefined sequence, as mentioned later. Thus, the bits included in the first sequence can scramble the information bits, making the scrambled information bits more evenly distributed. This results in the LPWUS generated based on the scrambled information bits being more evenly distributed in both the time and frequency domains, reducing the possibility of the LPWUS using the same or similar time-frequency resources as other LPWUS, thereby reducing interference from the LPWUS to neighboring cells. In one possible implementation, the terminal belongs to a first cell, and the first sequence may include a first sequence of the first cell, such as the LPSS sequence or PSS sequence of the first cell; or, the first sequence may include a predefined first sequence for the first cell, such as a predefined LPSS sequence or a predefined sequence for the first cell; or, the first cell may include a first sequence selected based on the identification information of the first cell, for example, selecting one LPSS sequence from multiple LPSS sequences based on the identification information of the first cell as the first sequence. In this way, diverse first sequences can be obtained in diverse ways, making the scrambling processing of LPWUS information bits based on the first sequence more diverse, which helps to further reduce the possibility that this LPWUS uses the same or similar time-frequency resources as other LPWUS. In one possible implementation, when the first information is used to determine the bearer location of the overlay sequence, the first information may include a first number of bearer location combinations. The first number is an integer greater than 1, for example, the first number may be M. The LPWUS can be divided into M bearer location combinations, and each bearer location combination includes at least one high level of the LPWUS. That is, each bearer location combination can be used to carry the overlay sequence. Correspondingly, the method may further include: the network device sending the first number to the terminal. Thus, the network device can divide the LPWUS to be transmitted into multiple bearer location combinations based on the first number, providing multiple locations that can carry the overlay sequence for easy selection. This increases the likelihood that the locations carrying the overlay sequence on different LPWUS will be different, helping to reduce interference to neighboring cells. Correspondingly, sending the first number to the terminal allows the terminal to clearly determine the bearer location of the overlay sequence based on the first number, facilitating corresponding reception. In one possible implementation, the terminal belongs to a first cell; the network device generates a Low Power Wake-up Signal (LPWUS) based on first information. Specifically, this may include: the network device determining a target bearer location combination corresponding to the first cell from the first number of bearer location combinations based on a first quantity and the identification information of the first cell. For example, the network device may perform a remainder operation on the first quantity based on the identification information of the first cell, and determine the bearer location combination corresponding to the remainder as the target bearer location combination; subsequently, the network device modulates the superimposed sequence onto the high level included in the target bearer location combination to generate LPWUS. In this way, the corresponding bearer location combination can be determined for each cell, which can increase the possibility that the LPWUS of different cells carries the superimposed sequence at different locations, and help reduce interference to adjacent cells. In one possible implementation, when the first information is used to determine the bearer location of the overlay sequence, the first information may include a second number of bearer locations in the bearer location combination. The second number is an integer greater than 1, for example, the second number can be M. The LPWUS can be divided into multiple bearer location combinations, each including M bearer locations, and each bearer location including at least one high level of the LPWUS. That is, each bearer location in each bearer location combination can be used to carry the overlay sequence. Accordingly, the method may further include: the network device sending the second number to the terminal. Thus, the network device can divide the LPWUS to be transmitted into multiple bearer location combinations based on the second number, and each bearer location combination includes multiple bearer locations, providing multiple locations that can carry the overlay sequence for easy selection. This increases the likelihood that the locations carrying the overlay sequence on different LPWUS will be different, helping to reduce interference to neighboring cells. Correspondingly, sending the second number to the terminal allows the terminal to clearly determine the bearer location of the overlay sequence based on the second number, facilitating corresponding reception. In one possible implementation, the terminal belongs to a first cell; the network device generates a Low Power Wake-up Signal (LPWUS) based on first information. Specifically, this may include: the network device determining the target bearer location corresponding to the first cell from the bearer locations of the second number of bearer location combinations based on a second quantity and the identification information of the first cell; for example, the network device may perform a remainder operation on the second quantity based on the identification information of the first cell, and determine the bearer location combination corresponding to the remainder in each bearer location combination as the target bearer location; subsequently, the network device modulates the superimposed sequence onto the high level included in the target bearer location to generate LPWUS. In this way, the bearer location corresponding to the bearer location combination can be determined for each cell, which can increase the possibility of the LPWUS of different cells carrying the superimposed sequence at different locations, and help reduce interference to adjacent cells. In one possible implementation, the method may further include: the network device sending second information to the terminal; the second information may be used to indicate the target bearer location combination of the bearer overlay sequence in the first number of bearer location combinations, for example, the second information may be a bitmap or a table. Thus, the target bearer location combination of the bearer overlay sequence can be directly indicated through the second information, and the terminal can directly determine the target bearer location combination for demodulation based on the second information, without needing to calculate the location, thereby saving the terminal's power consumption. In one possible implementation, the second information may include the first sub-information. The first sub-information indicates that the corresponding bearer position combination is the target bearer position combination. For example, when the second information is a bitmap, the first sub-information can be a bit with a value of 1 or higher; or, when the second information is a table, the first sub-information can be the information contained in the table. In this way, the target bearer position combination can be directly indicated through the first sub-information, which is convenient for the terminal to parse and confirm. In one possible implementation, the second information may further include second sub-information. This second sub-information indicates that the corresponding bearer position combination was not used to bear the superimposed sequence. For example, when the second information is a bitmap, the second sub-information can be a bit with a value of 0 or higher. In this way, it indicates both the position carrying the superimposed sequence and the position not carrying the superimposed sequence, minimizing the possibility of terminal reception errors. In one possible implementation, the method may further include: the network device sending second information to the terminal; the second information is used to indicate the target bearer position in the bearer overlay sequence of a second number of bearer positions in the bearer position combination, for example, the second information can be a bitmap or a table. Thus, the target bearer position of the bearer overlay sequence can be directly indicated through the second information, and the terminal can directly determine the target bearer position for demodulation based on the second information, without needing to perform position calculations or other processing, thereby saving the terminal's power consumption. In one possible implementation, the second information may include third sub-information. This third sub-information indicates that the corresponding bearer position in the bearer position combination is the target bearer position. For example, when the second information is a bitmap, the third sub-information can be a bit with a value of 1 or higher; or, when the second information is a table, the third sub-information can be the information contained in the table. Thus, the target bearer position combination can be directly indicated through the third sub-information, facilitating terminal parsing and confirmation. In one possible implementation, the second information may further include a fourth sub-information. This fourth sub-information indicates that the corresponding bearer position in the bearer position combination is not used to bear the superimposed sequence. For example, when the second information is a bitmap, the fourth sub-information can be a bit with a value of 0 or higher. In this way, it indicates both the position carrying the superimposed sequence and the position not carrying the superimposed sequence, minimizing the possibility of terminal reception errors. In one possible implementation, when the first information is used to determine the carrying location of the overlay sequence, the first information may include a third number of bits added to LPWUS, where the third number is an integer greater than 1. For example, the third information can be N, meaning N bits can be added to the information bits of LPWUS. The carrying location in LPWUS corresponding to the third number of newly added bits is used to carry the overlay sequence. For example, at least one of the N newly added bits can be used to carry the overlay sequence at its corresponding carrying location in LPWUS. Accordingly, the method may further include: the network device sending the third number to the terminal. In this way, the newly added third number of bits can provide multiple locations that can carry the overlay sequence for selection, increasing the likelihood that the locations carrying the overlay sequence on different LPWUS systems will be different, which helps reduce interference to neighboring cells. Accordingly, sending the third number to the terminal allows the terminal to determine the number of newly added bits based on the third number, and subsequently determine the carrying location of the overlay sequence for easier reception. In one possible implementation, the newly added bit may include a bit with a first value and a bit with a second value. The first value indicates that the corresponding bearer position in LPWUS is used to carry the superposition sequence, and the second value indicates that the corresponding bearer position in LPWUS is not used to carry the superposition sequence. For example, the first value can be 1, and the second value can be 0. In this way, by using different values ​​to indicate whether the newly added bit is used to carry the superposition sequence, the terminal can correctly understand and receive the corresponding data. In one possible implementation, the terminal belongs to the first cell. The method may further include: from a third number of newly added bits, the network device determines the newly added bit corresponding to the identification information of the first cell. For example, it can perform a remainder operation on the third number based on the identification information of the first cell, and determine the newly added bit corresponding to the remainder as the newly added bit corresponding to the identification information of the first cell. Subsequently, from the third number of newly added bits, the network device sets the newly added bit corresponding to the identification information of the first cell to a first value, and sets the remaining newly added bits to a second value. In this way, the newly added bits corresponding to the third number of newly added bits can be determined for each cell, and the superimposed sequence can be carried at different bearer positions corresponding to different newly added bits. This can increase the possibility of LPWUS of different cells carrying superimposed sequences at different positions, thereby reducing interference to adjacent cells. In one possible implementation, the terminal belongs to a first cell. The method may further include: from multiple preset sequences, the network device determines the preset sequence corresponding to the first cell as the overlay sequence. For example, the number of preset sequences can be moduloed based on the identification information of the first cell, and the preset sequence corresponding to the remainder can be used as the overlay sequence. Thus, for a terminal, the overlay sequence can be selected based on its belonging to the first cell, which helps improve the randomness of the overlay sequence used by the first cell, thereby reducing the possibility that the LPWUS of the first cell uses the same overlay sequence as other LPWUS, and helping to reduce interference to neighboring cells. In one possible implementation, the LPWUS may include OFDM symbols. The method may further include selecting a preset sequence corresponding to the symbol index of an OFDM symbol from a plurality of preset sequences as a superposition sequence. Thus, different OFDM symbols included in an LPWUS can be modulated using diverse superposition sequences, which helps increase the diversity of the LPWUS in the time and frequency domains, making its energy more dispersed. This reduces the possibility that the LPWUS will use the same superposition sequence as the LPWUS of other cells, thereby reducing interference to neighboring cells. In one possible implementation, the terminal belongs to the first cell, and the network device sends LPWUS to the terminal. Specifically, the network device sends LPWUS to the terminal at the time-frequency resource location corresponding to the first cell. In this way, LPWUS can be sent at different time-frequency resource locations for different cells. Correspondingly, each cell can only receive LPWUS at the time-frequency resource location allocated to it, which can reduce the occurrence of false reception and thus reduce interference to neighboring cells. In one possible implementation, the method may further include: if the number of bits in the first sequence is greater than the number of information bits in LPWUS, the network device may truncate the first sequence; the number of bits in the processed first sequence is the same as the number of information bits in LPWUS; if the number of bits in the first sequence is less than the number of information bits in LPWUS, the network device may pad the first sequence; the number of bits in the processed first sequence is the same as the number of information bits in LPWUS. Thus, using a first sequence with the same number of bits to scramble the information bits in LPWUS avoids both insufficient scrambling of the information bits and the addition of extra content to the information bits. In one possible implementation, the first number of bearer location combinations can be multiple combinations of bearer locations that are consecutive in time; alternatively, the first number of bearer location combinations can be multiple combinations of bearer locations that are random in time; or, the first number of bearer location combinations can include both odd-numbered and even-numbered bearer location combinations. This allows for diverse methods of grouping LPWUS, further reducing the possibility of different LPWUS carrying overlapping sequences at the same location, thereby reducing interference to neighboring cells. In one possible implementation, the bearer location can be a chip location, i.e., divided at the chip level; or the bearer location can be an OFDM symbol location, i.e., divided at the OFDM symbol level; or the bearer location can be a time slot location, i.e., divided at the time slot level. This allows for more diverse methods of grouping LPWUS, helping to reduce the possibility of different LPWUS carrying overlapping sequences at the same location, thereby reducing interference to neighboring cells. Secondly, this application provides a method for receiving a low-power wake-up signal (LPWUS), applied to a terminal. In this method, the terminal can receive a LPWUS from a network device based on first information; wherein the first information is used to scramble the information bits of the LPWUS; and / or, the first information is used to determine the carrying position of the superimposed sequence in the LPWUS, the superimposed sequence being used to carry the information bits of the LPWUS. Thus, on the one hand, the first information can scramble the information bits of the LPWUS, making the LPWUS received by the terminal more evenly distributed in the time and frequency domains. This reduces the possibility that other LPWUS use the same or similar time and frequency resources when the terminal receives the LPWUS, thereby reducing the interference of the LPWUS to neighboring cells and also reducing the interference of other cells to the terminal's own cell. On the other hand, the first information can be used to determine the bearer position of the overlay sequence in the generated LPWUS. The terminal can determine the bearer position of the overlay sequence in the LPWUS based on the first information, which helps with corresponding reception and minimizes the possibility that terminals in other cells will also receive the overlay sequence when the terminal receives the overlay sequence. This reduces the interference of the LPWUS to neighboring cells and also reduces the interference of other cells to the terminal's own cell. In one possible implementation, when the first information is used to scramble the information bits of LPWUS, the first information includes a first sequence; the terminal receives the low-power wake-up signal LPWUS from the network device based on the first information, which may include: the terminal descrambling the signal sequence corresponding to LPWUS based on the first sequence to obtain the information bits of LPWUS. In one possible implementation, the terminal belongs to a first cell; the first sequence includes a first sequence of the first cell, or a predefined first sequence for the first cell, or a first sequence selected based on the identification information of the first cell. In one possible implementation, when the first information is used to determine the bearer position of the superimposed sequence, the first information includes a first number of bearer position combinations, the first number being an integer greater than 1, and each bearer position combination includes at least one high level of LPWUS; the method further includes: the terminal receiving the first number from the network device. In one possible implementation, the terminal belongs to the first cell; the terminal receives the low-power wake-up signal LPWUS from the network device based on the first information, which may include: the terminal determines the target bearer location combination corresponding to the first cell from the first number of bearer location combinations based on the first number and the identification information of the first cell; the terminal demodulates the high level included in the target bearer location combination to obtain the superimposed sequence. In one possible implementation, when the first information is used to determine the bearer position of the superimposed sequence, the first information includes a second number of bearer positions in the combination of bearer positions, the second number being an integer greater than 1, and each bearer position including at least one high level of LPWUS; the method further includes: the terminal receiving the second number from the network device. In one possible implementation, the terminal belongs to the first cell; the terminal receives the low-power wake-up signal LPWUS from the network device based on the first information, which may include: the terminal determines the target bearer location corresponding to the first cell from the second number of bearer locations in the bearer location combination based on the second number and the identification information of the first cell; the terminal demodulates the high level included in the target bearer location to obtain the superimposed sequence. In one possible implementation, the terminal belongs to a first cell; the method further includes: the terminal receiving second information from a network device; the second information is used to indicate a target bearer location combination of a bearer location superposition sequence in a first number of bearer location combinations; correspondingly, the terminal receives a low-power wake-up signal LPWUS from the network device based on the first information, which may include: the terminal determining the target bearer location combination corresponding to the first cell from the first number of bearer location combinations based on the first number and the second information; subsequently, the terminal demodulates the high level included in the target bearer location combination to obtain the superposition sequence. In one possible implementation, the second information includes first sub-information, which is used to indicate that the corresponding bearer location combination is the target bearer location combination. In one possible implementation, the second information also includes second sub-information, which is used to indicate that the corresponding carrier position combination is not used to carry the superimposed sequence. In one possible implementation, the method further includes: the terminal receiving second information from the network device; the second information indicating the target bearer location in the bearer location superposition sequence of a second number of bearer locations in the bearer location combination; correspondingly, the terminal receiving a low-power wake-up signal LPWUS from the network device based on the first information may include: the terminal determining the target bearer location corresponding to the first cell from the second number of bearer locations in the bearer location combination based on the second number and the second information; the terminal demodulating the high level included in the target bearer location to obtain the superposition sequence. In one possible implementation, the second information includes a third sub-information, which is used to indicate that the corresponding bearing position in the bearing position combination is the target bearing position. In one possible implementation, the second information also includes a fourth sub-information, which indicates that the corresponding bearer position in the bearer position combination is not used to bear the superimposed sequence. In one possible implementation, when the first information is used to determine the carrying position of the superimposed sequence, the first information includes a third number of bits added for LPWUS, the third number being an integer greater than 1; the carrying position in LPWUS corresponding to the third number of added bits is used to carry the superimposed sequence; the method further includes: the terminal receiving the third number from the network device. In one possible implementation, the newly added bit includes a bit with a first value and a bit with a second value. The first value indicates that the bearer position corresponding to the newly added bit in LPWUS is used to carry the superposition sequence, and the second value indicates that the bearer position corresponding to the newly added bit in LPWUS is not used to carry the superposition sequence. Accordingly, the terminal receives the low-power wake-up signal LPWUS from the network device based on the first information, which may include: the terminal determining the newly added bit for LPWUS based on a third quantity; and the terminal demodulating the bearer position corresponding to the newly added bit with the first value in LPWUS from the newly added bit to obtain the superposition sequence. In one possible implementation, the terminal belongs to the first cell, and the method further includes: determining the preset sequence corresponding to the first cell from multiple preset sequences as the overlay sequence. In one possible implementation, LPWUS includes orthogonal frequency division multiplexing (OFDM) symbols, and the method further includes: selecting a preset sequence corresponding to the symbol index of the OFDM symbol from a plurality of preset sequences as a superposition sequence. In one possible implementation, the terminal belongs to the first cell, and the terminal receives the Low Power Wake-up Signal (LPWUS) from the network device based on the first information. This may include: at the time-frequency resource location corresponding to the first cell, the terminal receives the LPWUS from the network device based on the first information. It should be noted that for the various possible implementation methods of the second aspect, please refer to the introduction of the corresponding implementation methods of the first aspect, which will not be repeated here. Thirdly, this application provides a low-power wake-up signal transceiver system, which may include a network device and a terminal; the network device is used for; the terminal is used for. Fourthly, this application provides a communication device, which includes a processing unit and a transceiver unit. The communication device is used to execute the low-power wake-up signal transmission method of the first aspect, or to execute the low-power wake-up signal reception method of the second aspect. Fifthly, this application provides a communication device including a processor coupled to a memory, the memory storing a program or instructions for executing a low-power wake-up signal transmission method as described in the first aspect above, or a program or instructions for executing a low-power wake-up signal reception method as described in the second aspect. In a sixth aspect, this application provides a computer-readable storage medium storing a computer program or instructions that, when executed, cause the low-power wake-up signal transmission method of the first aspect described above, or the low-power wake-up signal reception method of the second aspect to be executed. In a seventh aspect, this application provides a communication system including the communication device described in the fourth aspect above. Eighthly, this application provides a computer program product comprising a computer program that, when run, causes the method for transmitting a low-power wake-up signal of the first aspect, or the method for receiving a low-power wake-up signal for executing the second aspect, to be executed. Attached Figure Description Figure 1 is a schematic diagram of a communication system provided in an embodiment of this application; Figure 2a is a schematic diagram of an LPWUS provided in an embodiment of this application; Figure 2b is a schematic diagram of modulating OFDM symbols using OOK-1 modulation according to an embodiment of this application; Figure 2c is a schematic diagram of modulating OFDM symbols using OOK-4 modulation according to an embodiment of this application; Figure 3 is a signaling interaction diagram of a method for transmitting and receiving a low-power wake-up signal according to an embodiment of this application. Figure 4a is a schematic diagram of an XOR process provided in an embodiment of this application; Figure 4b is a comparative diagram of LPWUS before and after scrambling provided in an embodiment of this application; Figure 5 is a signaling interaction diagram of another low-power wake-up signal transmission method and a low-power wake-up signal reception method provided in the embodiments of this application; Figure 6a is a schematic diagram of an overlaid sequence carrying position provided in an embodiment of this application; Figure 6b is a schematic diagram of another overlaid sequence carrying position provided in an embodiment of this application; Figure 7 is a schematic diagram of another overlaid sequence carrying position provided in an embodiment of this application; Figure 8 is a signaling interaction diagram of another method for transmitting and receiving a low-power wake-up signal provided in an embodiment of this application. Figure 9 is a schematic diagram of another overlaid sequence carrying position provided in an embodiment of this application. Detailed Implementation The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The embodiments of this application are applied to communication systems, which can be second-generation (2G) communication systems, third-generation (3G) communication systems, long-term evolution (LTE) systems, fifth-generation (5G) communication systems, LTE and 5G hybrid architectures, 5G New Radio (5G NR) systems, and new communication systems that will emerge in the future development of communication. In this application embodiment, an example of a communication system can be shown in FIG1, which includes a base station 101 and a terminal 102. It should be noted that the base station 101 is an example of a network side system. In the embodiments provided in this application, the base station can be any device with wireless transceiver capabilities, including but not limited to: evolved Node B (NodeB or eNB or e-NodeB) in LTE systems, base stations (gNodeB or gNB) or transmission receiving points / transmission reception points (TRPs) in new radio (NR), base stations evolved subsequently by 3GPP, access nodes, wireless relay nodes, wireless backhaul nodes, etc. in Wi-Fi systems. The base station can be: macro base station, micro base station, pico base station, small cell, relay station, or balloon station, etc. The base station can include one or more co-located or non-co-located transmission reception points (TRPs). The base station can also be a radio controller, centralized unit (CU), and / or distributed unit (DU) in a cloud radio access network (CRAN) scenario. The base station can communicate with the terminal, or it can communicate with the terminal through a relay station. The terminal can communicate with multiple base stations using different technologies. For example, the terminal can communicate with base stations that support LTE networks, base stations that support 5G networks, and can also establish dual connections with both LTE and 5G base stations. In the embodiments provided in this application, the terminal can take various forms, such as a mobile phone, tablet computer, computer with wireless transceiver capabilities, virtual reality (VR) terminal, augmented reality (AR) terminal, wireless terminal in industrial control, vehicle-mounted terminal, wireless terminal in self-driving, wireless terminal in remote medical care, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, wearable terminal, etc. The terminal may also be referred to as terminal equipment, user equipment (UE), access terminal, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal, mobile device, UE terminal, terminal, wireless communication equipment, UE agent, or UE device, etc. The terminal can also be a fixed terminal or a mobile terminal. It should be noted that the communication system shown in Figure 1 above is only an example. In actual applications, the communication system may include more numbers or types of devices. This application does not limit the specific architecture of the communication system. In practical applications, the network side can first encode the original information bits of LPWUS into digital signals, and then modulate the digital signals through on-off keying (OOK) modulation. On this basis, the network side can also introduce an overlaid sequence for modulation to obtain the final LPWUS and send it to the terminal. To avoid areas not covered by the network, there are overlapping areas between the cells covered by the network. When different cells use the same or similar time-frequency resources for LPWUS, high-level signals from LPWUS in different cells may be transmitted simultaneously on the same frequency (or at close time-frequency resource locations), easily causing interference between adjacent cells. Terminals located in overlapping areas between adjacent cells are particularly susceptible to interference. For example, if terminal 1 belongs to cell 1 and terminal 2 belongs to cell 2, and the time-frequency resources used for LPWUS transmissions to cell 1 and cell 2 are the same or similar, the LPWUS transmission from cell 2 may interfere with cell 1. In one scenario, terminal 1 might mistakenly receive and misinterpret the LPWUS of cell 2 as the LPWUS of cell 1. Even worse, when the LPWUS of cell 2 needs to wake up terminal 2, terminal 1 might be mistakenly woken up due to its misinterpretation of the LPWUS, even though the network does not need to establish a communication connection with terminal 1 for service transmission and reception, resulting in a waste of network resources. In another scenario, the interference from the LPWUS of cell 2 to cell 1 might be too strong, causing terminal 1 to be unable to receive the LPWUS of cell 1 normally, preventing it from being properly woken up. Consequently, the network cannot establish a communication connection with terminal 1 for service transmission and reception, impacting services. Based on this, this application provides a method for transmitting a low-power wake-up signal and a method for receiving a low-power wake-up signal. By processing the low-power wake-up signal, the method avoids using the same or similar time-frequency resources for LPWUS transmitted to different cells, or avoids carrying overlaid sequences in the same location for LPWUS transmitted to different cells, thereby reducing interference to adjacent cells. First, to more conveniently describe the low-power wake-up signal transmission method and low-power wake-up signal reception method provided in the embodiments of this application, the process of converting the original information bits of LPWUS into the final LPWUS in the related technology will be introduced with reference to Figures 2a-2c. Taking the use of a bitmap to indicate subgroups as an example, each raw information bit in LPWUS can correspond to one subgroup, and one subgroup can include one or more terminals. A raw information bit value of 1 indicates that the terminals included in the corresponding subgroup will be woken up; a raw information bit value of 0 indicates that the terminals included in the corresponding subgroup will not be woken up. Assuming the network needs to wake up 4 terminals, one subgroup can include 2 terminals, resulting in two subgroups: Subgroup 1 includes terminal 1 and terminal 2, and Subgroup 2 includes terminal 3 and terminal 4. This indicates that the number of raw information bits can be 2. Assuming the raw information bits are...

[0000] This indicates that terminals 1 through 4 will not be woken up; the original information bits are...

[0001] The original information bits are

[0010] , indicating that terminals 1 to 2 will not be woken up, while terminals 3 to 4 will be woken up; the original information bits are

[0011] , indicating that terminals 1 to 4 will be woken up. Taking the use of codepoints to indicate subgroups as an example, one codepoint corresponds to one subgroup. Assuming the network needs to wake up four terminals, one subgroup can include two terminals, resulting in two subgroups: Subgroup 1 includes terminal 1 and terminal 2, and Subgroup 2 includes terminal 3 and terminal 4. The number of original information bits can be 1. A value of 0 indicates that terminals 1 and 2 in subgroup 1 will be woken up, while terminals 3 and 4 in subgroup 2 will not be woken up; a value of 1 indicates that terminals 3 and 4 in subgroup 2 will be woken up, while terminals 1 and 2 in subgroup 1 will not be woken up. It should be noted that the following embodiments use the original information bits with bitmap indicating subgroups as an example to introduce the method provided by the embodiments of this application, but this does not constitute a limitation on this application. The network side can encode the original information bits to obtain a digital signal, as shown in Figure 2a. For example, forward error correction coding (Reed-Muller, RM), repetition coding, etc. can be used. For details, please refer to the description of S301 in Embodiment 1 below, which will not be elaborated here. It should be noted that other encoding methods can also be used to encode the original information bits, and this application does not limit this. The network side can then modulate the digital signal to obtain an analog signal. Taking OOK modulation as an example, OOK modulation can modulate the digital signal into an orthogonal frequency division multiplexing (OFDM) waveform, resulting in LPWUS (also known as the OOK-modulated carrier signal). Finally, the network side sends this LPWUS to the terminal. As shown in Figure 2a, LPWUS can include modulation symbols: ON and OFF symbols. The ON symbol in LPWUS (indicating carrier activation, OOK = 1) represents a high level, carrying the 1 in the digital signal; the OFF symbol in LPWUS (indicating carrier deactivation, OOK = 0) represents a low level, carrying the 0 in the digital signal. The LPWUS shown in Figure 2a contains the following digital signals:

[1010] . Building upon this, to achieve a flatter spectrum during LPWUS transmission, an overlaid sequence can be introduced to modulate the digital signal, generating the final LPWUS signal for transmission to the terminal. The ON symbol of the LPWUS can be modulated based on the overlaid sequence; this can also be described as the overlaid sequence being carried on the ON symbol of the LPWUS, as shown in Figure 2a. In this embodiment, the overlaid sequence can be a ZC sequence. Overlaid sequences have two modulation schemes: OOK-1 modulation and OOK-4 modulation. The OOK-1 modulation method is as shown in Figure 2b. Figure 2b describes an OFDM symbol after modulation by the OOK-1 modulation method from the perspective of frequency domain. An OFDM symbol contains only one bit of digital signal. An OFDM symbol carries a modulation symbol, such as carrying an ON symbol or carrying an OFF symbol. It can also be said that the length of one modulation symbol (referring to the length of one chip) is equal to the length of one OFDM symbol. As shown in Figure 2b, the network-side device first modulates the subcarriers based on the digital signal to be transmitted. When the subcarrier is 1 (OOK = 1), it indicates that the overlaid sequence is modulated onto the subcarrier; when the subcarrier is 0 (OOK = 0), all subcarriers have zero power consumption. Through inverse fast fourier transform (IFFT) and the addition of a cyclic prefix (CP), a modulated OFDM symbol is obtained. This ensures that the ON symbol (also known as the high level) in the LPWUS ultimately transmitted from the network side to the terminal is obtained based on overlaid sequence modulation. The OOK-4 modulation scheme is shown in Figure 2c. Figure 2c describes an OFDM symbol after OOK-4 modulation from a time-domain perspective, transforming M bits of OOK in the time domain. The number of chips in Figure 2c is M=4, meaning that one OFDM symbol carries four modulation symbols, including two ON symbols and two OFF symbols. It can also be said that the length of 4 modulation symbols (referring to the length of 4 chips) is equal to the length of 1 OFDM symbol. As shown in Figure 2c, the network side can multiply the overlaid sequence and the bits of the digital signal in the time domain, or multiply the overlaid sequence and the sampled signal of the digital signal to generate a signal. After the signal is generated, the network side can modify the signal or not. The network side can generate N subcarrier information in the frequency domain through discrete Fourier transform (DFT) or least squares transform. M bits of OOK will also generate N' samples. If the network side does not truncate or make other additional modifications to the signal, then N' = N. This ensures that the ON symbol (also called high level) in the LPWUS finally sent by the network side to the terminal is obtained based on overlaid sequence modulation. It should be noted that M=4 in Figure 2c is just an example, and M can also be different values ​​such as 1, 2, 4, 8, etc. Next, we will continue to describe how overlaid sequences carry the original information bits. In some embodiments, overlaid sequences can carry all the original information bits of LPWUS. For example, one overlaid sequence can carry all the original information bits, or one overlaid sequence can carry some of the original information bits, meaning that multiple overlaid sequences are needed to carry all the original information bits. In some embodiments, a fixed number of overlaid sequences can be pre-configured, and the base station can select an overlaid sequence from multiple overlaid sequences to carry the original information bits based on predefined rules. See the description of S303 in Embodiment 1 below; it will not be repeated here. It should be noted that all ON symbols in LPWUS can carry overlaid sequences, or some ON symbols can carry overlaid sequences while others do not. Taking Figure 2a as an example, assuming an overlaid sequence carries all the original information bits, then the overlaid sequence can be carried on the first ON symbol, and the other ON symbol does not need to carry the overlaid sequence. Alternatively, the same overlaid sequence can be carried on both ON symbols, that is, it can be carried repeatedly. This indicates that the LPWUS transmitted from the network side to the terminal can carry information bits in two ways. The terminal can receive either method to recover the information bits. For example, after receiving the first ON symbol, it can detect the overlaid sequence, demodulate it, and recover the original information bits; or, after receiving the complete LPWUS, it can decode it based on the digital signals indicated by high and low levels to recover the information bits. Alternatively, for greater accuracy, both methods can be used to recover the information bits, and this application does not limit this approach. Next, based on the above description, we will continue to describe in detail the low-power wake-up signal transmission method and the low-power wake-up signal reception method provided in the embodiments of this application. Example 1: It should be understood that the more dispersed the bits with a value of 1 (also called bit1) in a digital signal (or the more dispersed the bits with a value of 0 (also called bit0)), that is, the more dispersed the high level corresponding to digital signal 1 (or the low level corresponding to digital signal 0) in LPWUS, the less likely it is to transmit a high level using the same or similar time-frequency resource locations as other cells' LPWUS, and thus the less interference it will cause to other cells. For example, the digital signal is...

[1111] The energy of the [101010] signal is highly concentrated in the frequency domain. The corresponding LPWUS high-level time-frequency resource locations are highly susceptible to collisions with those of other cells, potentially causing interference to neighboring cells. In contrast, when the digital signal is [101010], its alternating nature and more uniform energy distribution reduce the likelihood of it using the same or similar time-frequency resource locations as other cells' LPWUS signals, thus minimizing interference to neighboring cells. Therefore, based on the encoding of the original information bits, further scrambling can be applied to make the final digital signal more evenly distributed in bit 1 (or bit 0). Next, referring to Figure 3, taking the network side as the base station and the base station sending LPWUS to the terminals in the first cell it covers as an example, we will introduce the method for sending and receiving low-power wake-up signals provided in the embodiments of this application. S301: The base station performs initial encoding on the original information bits to obtain the encoded information bits. Based on the example above, RM encoding and repetition encoding can be used to initially encode the original information bits. In some embodiments, the original information bits can be RM encoded, which adds redundancy to the original information bits. For example, the original information bits can be multiplied by the generator matrix to obtain the encoded information bits. Assuming the value of the original information bits is

[0011] , it can be encoded as [01101011]. In some embodiments, the original information bits may be repeatedly encoded, which repeats the original information bits multiple times. Assume the value of the original information bits is...

[1100] If the number of repetitions is 3, then the encoded information bits are [110011001100]. S302: The base station uses the first sequence to scramble the encoded information bits to obtain a digital signal. The first sequence refers to the sequence used to scramble the encoded information bits. The first sequence can also be referred to as an example of the first information, which is used to scramble the information bits of LPWUS. For example, the first sequence can be a Low Power Synchronization Signal (LPSS) sequence, or a Power Synchronization Signal (PSS) sequence, or a predefined sequence. The different forms of the first sequence will be described in detail below. The first sequence can be an LPSS sequence. An LPSS sequence is a predefined sequence of protocol specifications that the base station and the terminal must adhere to. It can be used to help the base station and the terminal achieve time synchronization and frequency synchronization, etc. For example, one or more LPSS sequences can be predefined, and the base station can generate LPSS sequences. In the example of predefining an LPSS sequence, the base station can directly scramble the encoded information bits based on this LPSS sequence (i.e., this LPSS sequence is the first sequence). For example, different LPSS sequences can be predefined for different cells. For instance, an LPSS sequence can be predefined for the first cell (also known as an example of a predefined first sequence for the first cell). When sending LPWUS to terminals in the first cell, the predefined LPSS sequence can be used to scramble the encoded information bits. In an example where multiple LPSS sequences are predefined, the base station can randomly select one LPSS sequence as the first sequence (also known as an example of a predefined first sequence for a first cell), and then use the selected LPSS sequence to scramble the encoded information bits. For example, if four LPSS sequences are predefined, namely LPSS sequence 0 to LPSS sequence 3, LPSS sequence 2 can be directly selected as the first sequence. It should be understood that the terminal the base station is about to wake up belongs to the first cell, indicating that the base station needs to send LPWUS to that first cell. In one example, the base station will send the LPSS sequence to the first cell, so the LPSS sequence of the first cell can be directly selected as the first sequence (also known as an example of the first sequence of the first cell). In another example, the base station can also select the LPSS sequence using the identification information of the first cell, which will be explained in detail below. In an example of predefined multiple LPSS sequences, the base station can select one LPSS sequence as the first sequence based on the cell identification information (also known as an example of selecting the first sequence based on the identification information of the first cell). In one example, the cell identification information can be the cell ID, which is used to distinguish different cells; that is, different cells have different cell IDs. Assuming there are a total of cells 1 to 10, the cell IDs corresponding to these 10 cells can be 0-9 respectively. In some embodiments, the cellid of the first cell can be moduloed by the number of LPSS sequences. For example, if the cellid of the first cell is 8 and the number of LPSS sequences is 4, then the modulo operation of 8 divided by 4 will result in 0, so LPSS sequence 0 can be selected as the first sequence. The first sequence can also be a PSS sequence. The PSS sequence can be used to achieve timing synchronization and frequency synchronization between the base station and the terminal. Considering that the base station sends a PSS sequence for each cell, in some embodiments, the base station can directly use the PSS sequence sent to the first cell as the first sequence (also referred to as an example of the first sequence of the first cell), that is, scramble the encoded information bits using the PSS sequence of the first cell. The first sequence can also be a predefined sequence, i.e., a predefined sequence. A base station can predefine a sequence for scrambling processing for the first cell (an example of a predefined first sequence for the first cell), and predefine different sequences for other cells. In other words, different sequences can be predefined for different cells. For example, sequence 1 can be predefined as a predefined sequence for the first cell, and sequence 2 can be predefined as a predefined sequence for the neighboring cells of the first cell, and so on. For example, pseudo-random sequences such as Gold sequences and M sequences can be generated as predefined sequences, but this application does not limit this. Next, we will continue to introduce the implementation method of scrambling the encoded information bits based on the first sequence. In some embodiments, the first sequence and the encoded information bits can be XORed. Specifically, the values ​​at the same position in the two sequences are XORed. If the values ​​at the same position are the same, 1 is obtained as a value in the digital signal. If the values ​​at the same position are different, 0 is obtained as a value in the digital signal. Finally, a new sequence is obtained as a digital signal. For example, as shown in Figure 4a, assuming the first sequence is [0110100110101010] and the encoded information bits are [1111000011110000], then performing an XOR operation on the first value 0 in the first sequence and the first value 1 in the encoded information bits yields the value 0. Similarly, a new sequence [0110011010100101] can be obtained as the digital signal. Compared to the encoded information bits, the obtained digital signal has more dispersed bits 0 and bits 1. It should be noted that the XOR operation of the encoded information bits using the first sequence is only an example, and other scrambling processes can also be used, which are not limited in this application. Thus, the encoded information bits can be scrambled using the first sequence, making bit 0 / bit 1 in the final digital signal more dispersed. This reduces the possibility that the LPWUS obtained based on digital signal modulation may use the same or similar time-frequency resources as the LPWUS of other cells, thereby reducing interference to neighboring cells of the first cell. In addition, considering that the number of bits in the first sequence and the number of bits in the encoded information bits may not be the same, the bits in the first sequence can be truncated or padded. In some embodiments, when the number of bits in the first sequence is greater than the number of bits in the encoded information bits, the first sequence can be truncated to make the number of bits in both sequences equal. For example, if the first sequence has 64 bits and the encoded information bits have 16 bits, then 16 bits can be randomly truncated from the first sequence, or 16 bits can be truncated backwards from the initial bit position of the first sequence, or 16 bits can be truncated forwards from the end bit position of the first sequence, etc. This application does not limit the truncating method of the first sequence. Taking PSS sequences or LPSS sequences as examples, their number of bits is usually large, so the above method can be used to truncate PSS sequences or LPSS sequences. In some embodiments, when the number of bits in the first sequence is less than the number of bits in the encoded information bits, the first sequence can be padded to make the number of bits in both sequences the same. For example, if the first sequence has 10 bits and the encoded information bits have 16 bits, then 6 bits can be padded to the first sequence. For example, the bits in the first sequence can be right-shifted and repeated, moving the entire sequence directly to the right. For instance, the first sequence includes [101010], which has 6 bits, while the encoded information bits have 20 bits. Therefore, the bits in the first sequence can be right-shifted and repeated to obtain a first sequence of 20 bits, which is [10101010101010101010]. For example, the bits in the first sequence can also be left-shifted and repeated, which also repeats the entire sequence. However, in the first repetition, the first bit is repeated at the last position, the second bit is repeated at the second-to-last position, and so on. The same operation is repeated in the second and subsequent repetitions. Suppose the first sequence is [101010], and it needs to be padded to 20 bits. Then the first repetition can result in [101010010101], and the second repetition can result in [10101001010110010101]. As an example, the original method of generating the first sequence can be used to continue generating a first sequence including more bits; or, a pseudo-random sequence can be generated and inserted into the start position, end position or random position of the first sequence, etc. This application does not limit the method of supplementing the first sequence. Furthermore, in the example where the first sequence is a predefined sequence, after obtaining the encoded information bits, a predefined sequence with the same number of bits can be generated accordingly, so that there is no need to perform padding or truncation on the first sequence later. It should be noted that S302 is an optional execution step. Alternatively, the first sequence can be used to scramble the original information bits to obtain a digital signal. This application does not limit this step. S303: The base station modulates the digital signal into LPWUS. During the process of the base station modulating the digital signal into LPWUS, the OOK-1 modulation method or the OOK-4 modulation method mentioned above can be used, and this application does not limit it. Based on the above introduction, during the modulation of LPWUS, overlaid sequences can be used to modulate the ON symbols. Multiple overlaid sequences can typically be pre-defined (also known as multiple preset sequences). Selecting different overlaid sequences for neighboring cells helps avoid LPWUS using the same overlaid sequence as other LPWUS, thereby reducing interference to neighboring cells. Therefore, the selection of the overlaid sequence is closely related to whether the final generated LPWUS will easily interfere with neighboring cells. As mentioned above, the base station sends LPWUS to the first cell. Different cells have different cell IDs, and the base station can use the cell ID of the first cell to select the overlaid sequence. In some embodiments, a modulo operation can be performed between the cellid of the first cell and the number of overlaid sequences. For example, if the cellid of the first cell is 8, the cellid of its neighboring cell is 9, and the number of overlaid sequences is 8 (including overlaid sequences 0 to 7), then for the first cell, a modulo operation of 8 divided by 8 yields 0, so overlaid sequence 0 can be selected. For the neighboring cell, a modulo operation of 9 divided by 8 yields 1, so overlaid sequence 1 can be selected. In addition, overlaid sequences can be pre-selected for cells, such as selecting overlaid sequence 1 for the first cell and overlaid sequence 2 for the neighboring cells of the first cell. In this way, for different cells, the overlaid sequence can be selected based on its corresponding cellid, which helps to improve the randomness of the overlaid sequence used by the first cell, thereby reducing the possibility that the LPWUS of the first cell uses the same overlaid sequence as other LPWUS, and helps to reduce interference to the neighboring cells of the first cell. Based on the above introduction, in the process of LPWUS modulation, a digital signal can be modulated onto an OFDM waveform to obtain LPWUS. LPWUS includes OFDM symbols, and different OFDM symbols have symbol indices. OFDM symbols carrying ON symbols can be modulated based on overlaid sequences, and therefore, overlaid sequences can also be selected based on the symbol indices of OFDM symbols. In some embodiments, the overlaid sequence indicated by the same symbol index can be directly selected based on the symbol index value. For example, LPWUS includes four OFDM symbols with symbol indices OFDM0-OFDM3. In an example where LPWUS is generated based on OOK-1 modulation, assuming that OFDM1 and OFDM2 each carry an ON symbol, and both are modulated based on an overlaid sequence, and the overlaid sequence includes overlaid sequence 0-overlaid sequence 7, then the ON symbol carried by OFDM1 can be modulated based on overlaid sequence 1, and the ON symbol carried by OFDM2 can be modulated based on overlaid sequence 2. Based on the above introduction, an OFDM symbol obtained by OOK-4 modulation can carry multiple symbols. Suppose OFDM1 carries two ON symbols. In this case, the two ON symbols can be modulated based on the same overlaid sequence 1. Alternatively, one ON symbol can be modulated using overlaid sequence 1, and the other ON symbol can be randomly selected from the remaining overlaid sequences, such as overlaid sequence 7. Thus, different OFDM symbols included in an LPWUS can be modulated using diverse overlaid sequences, which helps to increase the diversity of the LPWUS in the time and frequency domains, making its energy more dispersed, thereby reducing the possibility that the LPWUS uses the same overlaid sequence as the LPWUS of other cells, and reducing interference to the neighboring cells of the first cell. S304: The base station sends LPWUS to the terminal. As shown in Figure 4b, assuming the encoded information bits are [111000], the digital signal after XORing the first sequence with them is [101010]. It can be seen that compared with the unscrambled LPWUS (that is, the LPWUS obtained by directly modulating the encoded information bits as a digital signal), the scrambled LPWUS has a more uniform distribution of bit0 and bit1. It should be understood that when a base station sends LPWUS to a terminal, it needs to occupy time and frequency resources. Time and frequency resources have specific locations. After generating LPWUS, the base station needs to send LPWUS at the time and frequency resource location. The location of time-frequency resources is determined by both the time-domain location and the frequency-domain location. The time-domain location can be the position of LPWUS on the time axis; for example, it can be a specific time slot location, subframe location, etc. The frequency-domain location can be the position of LPWUS on the frequency axis; for example, it can be a specific resource block location or subcarrier location. The following examples use time slot locations in the time domain and resource block locations in the frequency domain as illustrative examples. In some embodiments, multiple time-frequency resource locations can be predefined to pre-allocate different time-frequency resource locations for different cells. For example, suppose there are 5 cells with cell IDs 0-4. Time-frequency resource locations 0-4 can be predefined. Assuming the first cell has a cell ID of 0, time-frequency resource location 0 can be pre-assigned to it, and different time-frequency resource locations can be assigned to the other cells. The base station can then wait for time-frequency resource location 0 to send LPWUS to the first cell. Next, we will continue to introduce the different time-frequency resource locations. In one example, different time-frequency resource locations can have different time-domain locations, and their frequency-domain locations can be the same or different. For example, taking time-frequency resource locations including time-frequency resource locations 0 to 2 as an example, time-frequency resource location 0 can be resource blocks 5-6 in time slot 1, time-frequency resource location 1 can be resource blocks 6-7 in time slot 2, and time-frequency resource location 2 can be resource blocks 8-9 in time slot 3. The time-domain locations of these three time-frequency resource locations are all different, and the frequency-domain locations of time-frequency resource locations 0 and 1 partially overlap, that is, resource block 6 overlaps. In another example, different time-frequency resource locations can have different frequency domain locations, and their time domain locations can be the same or different. For example, time-frequency resource location 0 can be resource blocks 5-6 in time slot 1, time-frequency resource location 1 can be resource blocks 1-2 in time slot 1, and time-frequency resource location 2 can be resource blocks 8-9 in time slot 2. The frequency domain locations of these three time-frequency resource locations are all different, and the time domain locations of time-frequency resource location 0 and time-frequency resource location 1 overlap, that is, time slot 1 overlaps. In another example, different time-frequency resource locations can have different frequency domain locations and different time domain locations. For example, time-frequency resource location 0 can be resource block 5-6 in time slot 1, and time-frequency resource location 1 can be resource block 1-2 in time slot 2. These two time-frequency resource locations have different frequency domain locations and different time domain locations. In this way, by sending LPWUS at different time-frequency resource locations for different cells, the corresponding cells can receive LPWUS only at the time-frequency resource locations allocated to them, which can reduce the occurrence of false reception and thus reduce interference from neighboring cells. In addition, in some embodiments, the location of time and frequency resources can be configured through system messages after LPWUS is generated, and this application does not limit this. S305: The terminal receives LPWUS based on the first sequence. In an example where multiple time-frequency resource locations are predefined and different time-frequency resource locations are allocated to different cells, the base station can notify the terminal of the predefined allocation results. For example, when a base station allocates time-frequency resource locations to each cell, the base station can send the time-frequency resource location of the first cell to the terminal via signaling. The terminal can then wait to receive LPWUS at the time-frequency resource location of the first cell. In some embodiments, the base station may send the first sequence and LPWUS together to the terminal, so that the terminal can receive LPWUS based on the first sequence. In some embodiments, the base station may send the first sequence to the terminal separately via signaling before sending LPWUS. This application does not limit the sending order of the first sequence and LPWUS. After receiving LPWUS, the terminal can obtain a digital signal (also known as a signal sequence) through high and low levels. Assuming the digital signal is [0110011010100101] and the first sequence is [0110100110101010], the digital signal can be descrambled based on the first sequence, corresponding to the scrambling process described above, to obtain the encoded information bits. In the example where the scrambling process is XOR processing, the corresponding descrambling process is also XOR processing. Therefore, the first sequence and the digital signal can be XORed in the same way. XORing the first value 0 in the first sequence and the first value 0 in the digital signal yields 1. Similarly, the encoded information bits can be obtained as [1111000011110000]. Then, by using the corresponding decoding method to decode the encoded information bits, the original information bits can be restored. The previous section introduced the process of decoding digital signals based on the first sequence. The following section introduces the process of demodulating overlaid sequences. It should be understood that, based on the above introduction, the overlaid sequence can be selected based on different rules (such as cellid of the cell, or symbol index of OFDM symbol). Accordingly, the terminal must also explicitly select the overlaid sequence in order to perform the corresponding demodulation. In the example of selecting an overlaid sequence based on the cell ID of the cell, the terminal also stores each overlaid sequence and the cell ID of the first cell to which it belongs. Therefore, the terminal can select an overlaid sequence again based on the cell ID of the first cell. Based on the example above, the cellid of the first cell can be moduloed by the number of overlaid sequences to determine the selected overlaid sequence, after which demodulation can be performed. See the above description for details, which will not be repeated here. Similarly, in the example of selecting an overlaid sequence based on the symbol index of OFDM symbols, the terminal can select an overlaid sequence again based on the symbol index of OFDM symbols. For details, please refer to the relevant introduction above, which will not be repeated here. The terminal may include a wake-up receiver unit and a main communication unit. The wake-up receiver unit may receive LPWUS. After receiving the original information bits in the manner described above, the wake-up receiver unit determines that the original information bits indicate that it should wake itself up, which may trigger the main communication unit to start. As can be seen from the above, Embodiment 1 can obtain a more dispersed digital signal of bit0 / bit1 through the first sequence; and it can select the overlaid sequence based on predefined rules, which can increase the difference between the overlaid sequences used in different cells, improve the randomness of overlaid sequence selection, or increase the diversity of the overlaid sequence carried by the final generated LPWUS; and it can also pre-allocate different time-frequency resource locations for different cells, so that the terminal can wait to receive LPWUS at the pre-allocated time-frequency resource location, which can reduce the occurrence of false reception. The above content helps to improve the difference between the time-frequency resources used by the LPWUS of the first cell and the time-frequency resources used by the LPWUS of other cells, or helps to improve the difference between the overlaid sequence used by the LPWUS of the first cell and the overlaid sequence used by the LPWUS of other cells, which can reduce the interference of the LPWUS of the first cell to the adjacent cells of the first cell, thereby reducing the occurrence of false reception and mismodulation by the terminals of adjacent cells, avoiding the waste of network resources, and reducing the situation where the terminals of adjacent cells cannot receive the LPWUS of their own cells normally, so as to ensure smooth service. Example 2: It should be understood that after encoding the original information bits and / or performing the scrambling process described in Example 1, the number of bits in the resulting digital signal will increase significantly compared to the original information bits. For example, if there are 5 original information bits, the final digital signal will have 32 bits. For modulating ON symbols using overlaid sequences, one or more overlaid sequences can typically carry all the information bits, indicating that the final number of overlaid sequences to be transmitted is far less than the number of ON symbols in LPWUS. Therefore, to further reduce interference to neighboring cells of the first cell, the carrying position of the overlaid sequences can be selected. Next, referring to Figure 5, taking the network side as the base station and the base station sending LPWUS to the terminals in the first cell it covers as an example, we will introduce the method for sending low-power wake-up signals and the method for receiving low-power wake-up signals provided in the embodiments of this application. S501: Base station configuration of overlaid sequence bearer location information. The carrying position information of the overlaid sequence is used to indicate the carrying position of the overlaid sequence. In some embodiments, the location information can be M (M refers to an example of the first information), where M is an integer greater than 1. For example, the base station can divide the subsequently generated LPWUS ON symbols into M bearer location combinations (M can also be called the first number of bearer location combinations), or the base station can divide the subsequently generated LPWUS ON symbols into multiple bearer location combinations based on M, with each bearer location combination including M bearer locations. These will be described in detail below. In some embodiments, the base station can divide the subsequently generated LPWUS ON symbols into M bearer position combinations, where M can be an integer greater than 1. Each bearer position combination includes at least one high level of LPWUS. For example, LPWUS may include 9 ON symbols, and M is 3. These 9 ON symbols can be divided into 3 bearer position combinations, including bearer position combination 0 to bearer position combination 2. Each bearer position combination may include at least one ON symbol. For example, each bearer position combination may include 3 ON symbols, or bearer position combination 0 may include 2 ON symbols, bearer position combination 1 may include 4 ON symbols, and bearer position combination 2 may include 3 ON symbols. This application does not limit the number of ON symbols included in the bearer position combination, or whether the number of ON symbols included in each bearer position combination is the same. In this embodiment, the carrying location information of the overlaid sequence may include M, which can indirectly indicate the carrying location of the overlaid sequence. In some embodiments, LPWUS can be divided into M time-continuous combinations of bearer locations. As shown in Figure 6a, assuming LPWUS is based on digital signal [011010] modulation, bit 0 corresponds to a high-to-low transition, and bit 1 corresponds to a low-to-high transition, comprising a total of 6 ON symbols. Assuming M is 2, these 6 ON symbols can be divided into two carrier position combinations: carrier position combination 0 and carrier position combination 1. Carrier position combination 0 can include the first 3 ON symbols, and carrier position combination 1 can include the last 3 ON symbols. That is, these two carrier position combinations are time-continuous. In the example of M time-continuous bearer location combinations corresponding to LPWUS, the bearer location combination that carries its overlaid sequence can be determined based on the cellid of the cell (also known as the target bearer location combination corresponding to the first cell). The determined bearer location combination can carry the overlaid sequence of the cell based on the original information bits. That is, the overlaid sequence is modulated onto the high level of the bearer location combination. In one example, the cell ID and M can be used for a modulo operation. For instance, if the cell ID of the first cell is 8 and M is 2, then taking the modulo of 8 with 2 yields 0, allowing one of the two bearer location combinations to be selected to carry the overlaid sequence. Similarly, if the cell ID of a neighboring cell is 3, taking the modulo of 3 with 2 yields 1, allowing another bearer location combination to be selected to carry the overlaid sequence. The bearer locations in the LPWUS of the first cell carrying the overlaid sequence can be staggered from those in the LPWUS of the neighboring cell. Taking LPWUS as shown in Figure 6a as an example, assuming a remainder of 0 corresponds to selecting bearer position combination 0, and a remainder of 1 corresponds to selecting bearer position combination 1, if the first cell has an overlaid sequence to transmit, then the overlaid sequence can be carried on each ON symbol in bearer position combination 0. Each ON symbol in bearer position combination 1 may not carry any sequence, or it may carry a pseudo-random sequence or other ZC sequences that do not carry useful information. In some embodiments, the parity of each ON symbol in LPWUS can be divided to obtain M combinations of bearer positions. In one example, M can be 2, which can divide the ON symbols in odd positions into one carrier position combination and the ON symbols in even positions into another carrier position combination. This will be used as an example in the following text. For example, each ON symbol can have corresponding identification information. For instance, the identification information can be assigned sequentially according to the order in which they were transmitted, such as 0, 1, 2, etc. In the example of LPWUS including 9 ON symbols, the corresponding identification information for each symbol can be 0-8, which can be referred to as ON symbol 0-ON symbol 8 for ease of explanation later. In the example where M is 2, ON symbol 0, ON symbol 2, ON symbol 4, ON symbol 6 and ON symbol 8 belong to a combination of bearer positions (which can be called an even-numbered combination of bearer positions), and ON symbol 1, ON symbol 3, ON symbol 5 and ON symbol 7 belong to a combination of bearer positions (which can be called an odd-numbered combination of bearer positions). In this example, a combination of bearer locations with the same parity can be selected based on the parity of the cell's identification information. For example, if the cellid is odd, an overlaid sequence can be carried on an ON symbol that is also odd, such as the various ON symbols included in the odd-numbered carrying position combination mentioned above; if the cellid is even, an overlaid sequence can be carried on an ON symbol that is also even, such as the various ON symbols included in the even-numbered carrying position combination mentioned above. For example, if the cellid of the first cell is 7 and M is 2 (7 being an odd number), and assuming the LPWUS of the first cell is the LPWUS with 9 ON symbols as described above, then overlaid sequences can be carried on ON symbols 1, 3, 5, and 7. Even-numbered ON symbols may not carry any sequences, or they may carry pseudo-random sequences or other ZC sequences that do not carry useful information. In this example, M is 2 for illustrative purposes only. M can also be an integer greater than 2. For example, the ON symbols in odd positions can be divided into two or more carrier position combinations, and / or the ON symbols in even positions can be divided into two or more carrier position combinations. This application does not limit this. Furthermore, in some embodiments, the ON symbols included in LPWUS can be randomly grouped based on M. Taking LPWUS as an example, which includes 9 ON symbols, including ON symbols 0-8, and assuming M is 3, it can be divided into bearer position combinations 0-2. Bearer position combination 0 can include ON symbols 0, 2, and 7; bearer position combination 1 can include ON symbols 3, 4, and 8; and bearer position combination 2 can include ON symbols 1, 5, and 6. It should be emphasized that in the example of dividing at the chip level (see the following explanation of chip level granularity), the division of the ON symbol is only an example. It can also be divided for all chip positions. For example, LPWUS includes 9 chips and M is 3, so it can also be divided into 3 carrier position combinations. Each carrier position combination can include 3 chips, and the 3 chips include at least one ON symbol. That is to say, it can also include OFF symbols. This application does not limit this. It should be noted that the cell identification information can be cellid for example only. The cell identification information can also be the bearer location identifier (which can be simply referred to as bearer location ID) assigned to each cell. The bearer location ID is used to determine the corresponding bearer location combination for each cell. For detailed implementation, please refer to the relevant introduction on the bearer location combination corresponding to the cellid of the cell described above, which will not be repeated here. The previous section introduced how to divide the subsequently generated LPWUS ON symbols into M bearer position combinations and how to carry overlaid sequences. Next, we will continue to introduce how to divide the subsequently generated LPWUS ON symbols into multiple bearer position combinations based on M, with each bearer position combination including M bearer positions, and how to carry overlaid sequences. LPWUS can be divided at different granularities. For example, it can be divided at the chip level, OFDM symbol level, or time slot level. For example, in the chip-level granularity example, M corresponds to the number of chips. Based on the above-described related technologies, one chip can correspond to one ON symbol, so M refers to the number of ON symbols. The ON symbols of the subsequently generated LPWUS can be divided into multiple carrier position combinations based on M, with each carrier position combination including M ON symbols as M carrier positions. Alternatively, one chip can correspond to one ON symbol or one OFF symbol, and the chips of the subsequently generated LPWUS can also be divided into multiple carrier position combinations based on M, with each carrier position combination including M chips as M carrier positions. For example, in the example of dividing at the OFDM symbol level, M corresponds to the number of OFDM symbols. In the OOK-1 modulation example, the length of one OFDM symbol is the length of one chip, and each bearer position combination includes M ON symbols as M bearer positions. In the OOK-4 modulation example, the length of one OFDM symbol is the length of 4 chips, and each bearer position combination includes M OFDM symbols as M bearer positions. One bearer position can include 4 chips. As an example, in the example of dividing at the slot level, M corresponds to the number of slots. A slot can include the length of multiple OFDM symbols. Each bearer location combination includes M slots as M bearer locations. A bearer location can include multiple OFDM symbols. An OFDM symbol can include 1 or 4 chips. The examples below are presented with chip-level granularity and the ON symbol is divided accordingly, but this does not limit the scope of this application. In some embodiments, the base station may divide the subsequently generated LPWUS into multiple bearer position combinations, each bearer position combination including M ON symbols (M may also be referred to as the second number of bearer positions in the bearer position combination), M can be an integer greater than 1, and each bearer position includes at least one high level of LPWUS. As shown in Figure 6b, assuming that LPWUS is obtained by modulation based on digital signal [011010], and M is 2, the LPWUS can be divided into 3 bearer position combinations based on M, namely bearer position combination 0 to bearer position combination 2. Each bearer position combination includes 2 ON symbols. Bearer position combination 0 includes bit0 and bit1, bearer position combination 1 includes bit1 and bit0, and bearer position combination 2 includes bit1 and bit0. In some embodiments, the bearer position (also known as the target bearer position) for carrying an overlaid sequence in a bearer position combination can be determined based on the cell ID of the cell. Then, the overlaid sequence of that cell can be carried at the same bearer position in multiple bearer position combinations; that is, the overlaid sequence is modulated onto the high level of the same bearer position in multiple bearer position combinations. In one example, the bearer location for carrying the overlaid sequence can be determined directly within each bearer location combination for a cell. For instance, for the first cell, the first location in each bearer location combination is determined to carry the overlaid sequence, and for neighboring cells of the first cell, the second location in each bearer location combination is determined to carry the overlaid sequence. In another example, the cell ID of a cell can be moduloed by M. For instance, if the cell ID of the first cell is 8 and M is 2, then taking the remainder of 8 by 2 yields 0. Therefore, the first bearer location among multiple bearer location combinations can be selected to carry the overlaid sequence. Taking LPWUS as shown in Figure 6b as an example, the ON symbol of the first bearer position included in bearer position combination 0 to bearer position combination 2 can be used to carry the overlaid sequence. In another example, the parity of the cell ID can be used to determine the location for carrying an overlaid sequence within a combination of bearer locations. If the cell ID is odd, the overlaid sequence can be carried at an odd-numbered bearer location within the combination; if the cell ID is even, the overlaid sequence can be carried at an even-numbered bearer location within the combination. For example, if the cellid of the first cell is 7 and M is 2, and 7 is an odd number, then the odd-numbered bearer position from multiple bearer position combinations can be selected to carry the overlaid sequence. Taking bearer position combination 0 to bearer position combination 1 as an example, each bearer position combination includes two bearer positions. The ON symbol of the second bearer position in bearer position combination 0 (corresponding to odd position 1) can be used to carry the overlaid sequence, and the ON symbol of the second bearer position in bearer position combination 1 (corresponding to odd position 3) can be used to carry the overlaid sequence. It should be noted that the content shown in Figure 6b is a combination of multiple time-continuous bearer locations obtained by LPWUS partitioning, and each bearer location combination includes M bearer locations. Furthermore, in some embodiments, the ON symbols included in LPWUS can also be randomly grouped based on M. Taking LPWUS as an example, which includes 6 ON symbols, including ON symbols 0-5, and assuming M is 2, it can be divided into bearer position combination 0-bearer position combination 2. Bearer position combination 0 can include ON symbols 0 and 2, bearer position combination 1 can include ON symbols 3 and 5, and bearer position combination 2 can include ON symbols 1 and 4. It should be noted that using the cell ID to determine the bearer location for carrying overlaid sequences within a bearer location combination is merely an example. Alternatively, each cell can be assigned a bearer location ID, and this ID can be used to determine the bearer location for carrying overlaid sequences within a bearer location combination for each cell. For detailed implementation methods, please refer to the above description of using the cell ID to determine the bearer location for carrying overlaid sequences within a bearer location combination; it will not be repeated here. The preceding text introduced the implementation of the carrier location information, including M, which indirectly indicates the carrier location of the overlaid sequence. The following section will introduce carrier location information that can directly indicate the carrier location of the overlaid sequence. In subsequent embodiments, it is assumed that the LPWUS is still divided into multiple bearer location combinations in the manner described above. In this embodiment, the bearer location information may include M and second information. The second information may be used to directly indicate the bearer location combination (also known as the target bearer combination) or the bearer location (also known as the target bearer location) in the bearer location combination that carries the overlaid sequence in LPWUS. In the example where M corresponds to the number of bearer position combinations, let's take a bitmap as an example of the second information. The number of bits in the bitmap is the same as the number of bearer position combinations included in LPWUS. Assuming M is 6, the ON symbol of LPWUS is divided into 6 bearer position combinations, so the bitmap includes 6 bits, and one bit in the bitmap corresponds to one bearer position combination. A bit value of 1 in the bitmap (a bit with a value of 1 can also be considered an example of the first sub-information) indicates that the ON symbol in the bearer position combination corresponding to that bit bit carries an overlaid sequence. A bit value of 0 in the bitmap (a bit with a value of 0 can also be considered an example of the first sub-information) indicates that the ON symbol in the bearer position combination corresponding to that bit bit does not carry a sequence, or carries a pseudo-random sequence, or carries other ZC sequences. That is, the information contained indicates both bearer position combinations that carry overlaid sequences and bearer position combinations that do not carry overlaid sequences. It should be noted that the bit values ​​of 1 or 0 in the above examples are merely examples and can also be other values, which are not limited in this application. As shown in Figure 7, assuming M is 4, the bitmap can include 4 bits, specifically...

[1010] , respectively corresponding to bearer position combination 0 to bearer position combination 3, in the example of M time-continuous bearer position combinations in LPWUS, it means that the ON symbols included in bearer position combination 0 and bearer position combination 2 respectively carry overlaid sequences. It should be noted that in the example above, the information format of the second information is bitmap, which is only an example. The information format of the second information can also be a predefined table or other formats. As shown in Table 1, in the example shown in Figure 7, the second information may include bearer position combination 0 and bearer position combination 2, that is, the information contained (also known as an example of the first sub-information) directly indicates the bearer position combination of the bearer overlaid sequence. Table 1 In the example where M corresponds to the number of positions in a combination of positions, taking a bitmap as the form of the second information as an example, the number of bits in the bitmap is the same as the number of positions in the combination of positions. Assuming M is 3, and each combination of positions includes 3 positions, then the bitmap includes 3 bits, and each bit in the bitmap corresponds to one position in the combination of positions. A bit value of 1 in the bitmap (a bit with a value of 1 can also be considered an example of the third sub-information) indicates that the bit carries an overlaid sequence at its corresponding position in each combination of positions. A bit value of 0 in the bitmap (a bit with a value of 0 can also be considered an example of the fourth sub-information) indicates that the bit does not carry a sequence at its corresponding position in each combination of positions, or carries a pseudo-random sequence, or carries another ZC sequence. It should be noted that the bit values ​​of 1 or 0 in the above examples are merely examples; other values ​​are also possible, and this application does not limit this. Similarly, other forms of second information, such as predefined tables, can also be used, and this application does not limit this. For example, the second information may include information that directly indicates the bearer position of the overlaid sequence in each bearer position combination (which can also be called an example of third sub-information). S502: The base station sends the bearer location information of the overlaid sequence to the terminal. In the example where the location information is M, the base station can send M to the overlaid sequence via signaling. In the example where the location information is M and the second information is carried, the base station can send M and the second information to the overlaid sequence via signaling. In the example where the base station assigns a bearer location ID to each cell, the bearer location ID can be pre-sent to the terminal by the base station, or it can be sent simultaneously by the base station when sending the bearer location information to the terminal. S503: The base station modulates the original information bits to obtain LPWUS. S504: The base station sends LPWUS to the terminal. It should be noted that the implementation methods of S503-S505 can refer to the implementation methods of S301-S304 in Embodiment 1. That is to say, Embodiment 2 can be executed in conjunction with Embodiment 1. Furthermore, in some embodiments, S503-S504 can also be implemented using conventional techniques, meaning that Embodiment 2 can be executed independently. S505: The terminal receives LPWUS based on the bearer location information of the overlaid sequence. In the example where the bearer location information is M and the corresponding bearer location combination is determined based on the cellid (or bearer location id) of the cell, the base station can first divide the received LPWUS into M bearer location combinations based on M, and then determine the corresponding bearer location combination (also called the target bearer location combination) based on the cellid (or bearer location id) of its own first cell. The base station can then demodulate the overlaid sequence on the ON symbol (also called the high level) of the bearer location combination. The overlaid sequence can then be further demodulated to obtain the original information bits. For details, please refer to the introduction in S501, which will not be repeated here. Taking LPWUS as shown in Figure 6a as an example, assuming that the terminal determines that each ON symbol in the bearer position combination 0 carries an overlaid sequence, the overlaid sequence can be detected for each ON symbol in the bearer position combination 0, and the overlaid sequence can be demodulated to restore the original information bits. Alternatively, in the example where the bearer location information is M, and the corresponding bearer location in a bearer location combination is determined based on the cellid (or bearer location id) of the cell, the base station can first divide the received LPWUS into multiple bearer location combinations based on M, with each bearer location combination including M bearer locations. Then, based on the cellid (or bearer location id) of its own first cell, the base station determines the corresponding bearer location (also called the target bearer location). The base station then demodulates the overlaid sequence on the ON symbol of the bearer location in each bearer location combination. The overlaid sequence can then be further demodulated to obtain the original information bits. For details, please refer to the introduction in S501, which will not be repeated here. Taking LPWUS as shown in Figure 6b as an example, assuming that the terminal determines that the ON symbol of the first bearer position in each bearer position combination carries an overlaid sequence, then the overlaid sequence can be obtained by detecting these ON symbols, and the overlaid sequence can be demodulated to restore the original information bits. In the example where the bearer location information is M and the second information is , the base station can first divide the received LPWUS into M bearer location combinations based on M, and then determine the bearer location combination that carries the overlaid sequence based on the second information. Then, the overlaid sequence can be obtained by detecting the ON symbols included in the bearer location combination and demodulating it to restore the original information bits. For details, please refer to the introduction in S501, which will not be repeated here. Taking LPWUS as an example as shown in Figure 7, the bitmap is...

[1010] , M is 4. The terminal determines that the ON symbols included in the bearer position combination 0 and the bearer position combination 2 respectively carry overlaid sequences. Then, the overlaid sequences can be detected and demodulated for the ON symbols included in these two bearer position combinations to restore the original information bits. Alternatively, in the example where the bearer location information is M and the second information is used, the base station can first divide the received LPWUS into multiple bearer location combinations based on M, with each bearer location combination including M bearer locations. Then, based on the second information, the bearer location in a bearer location combination that carries the overlaid sequence can be determined. The overlaid sequence can then be obtained by detecting the ON symbols included in the bearer location of each bearer location combination and demodulating it to restore the original information bits. For details, please refer to the introduction in S501, which will not be repeated here. As can be seen from the above, Embodiment 2 can determine the combination or location of the bearer position for the overlaid sequence in the corresponding LPWUS based on different cells, so that the terminal can demodulate the overlaid sequence at the determined bearer position. On the one hand, it can stagger the bearer positions of the overlaid sequence in some cells, which can avoid the possibility of complete overlap of time and frequency resources used by different LPWUS, and help reduce interference to the adjacent cells of the first cell. On the other hand, it can also reduce the occurrence of terminal mis-demodulation to a certain extent, which helps to save network resources. Example 3: Similar to Embodiment 2, Embodiment 3 can also select the bearer position of the overlaid sequence in LPWUS. However, unlike Embodiment 2, where bearer position information is sent separately to indicate the bearer position of the overlaid sequence in LPWUS, Embodiment 3 can add information bits to the original information bits in LPWUS and carry the overlaid sequence in the added information bits. Next, referring to Figure 8, taking the network side as the base station and the base station sending LPWUS to the terminals in the first cell it covers as an example, we will introduce the method for sending low-power wake-up signals and the method for receiving low-power wake-up signals provided in the embodiments of this application. S801: Number of newly added information bits configured for the base station. In some embodiments, the base station can be configured to have N (also known as a third number of bits added for LPWUS) as the number of information bits added by LPWUS, where N can be an integer greater than 1. The added information bits can be used to carry overlaid sequences. As shown in Figure 9, assuming N is 3, this means 3 new information bits need to be added to LPWUS. Assuming the original number of information bits is 6, 3 new information bits can be added before it, resulting in a total of 9 information bits. For example, the value of the newly added information bit could be 1 (also called the first value example, which can be other values), indicating that the corresponding bearer position in LPWUS carries an overlaid sequence. The value of the newly added information bit could be 0 (also called the second value example, which can be other values), indicating that the corresponding bearer position in LPWUS does not carry an overlaid sequence. It should be noted that Figure 9 only shows a portion of LPWUS. It should be noted that this application does not restrict the position of the newly added information bits, and they can also be added after LPWUS. In some embodiments, the base station can configure different location indexes for different cells. The location index is the bit position that carries the overlaid sequence directly configured in the newly added information bits for the cell. For example, there are multiple cells, including a first cell. The number of newly added information bits N is 3, including information bits 0 to 2. The configuration can be applied to the first cell, using information bit 1 from these 3 newly added information bits to carry the overlaid sequence. The values ​​of information bits 0 to 2 are

[0010] . Information bits with a value of 1 are used to carry the overlaid sequence at the corresponding bearer position in LPWUS, as shown in Figure 9. Other ON symbols may not carry the overlaid sequence, or they may carry a pseudo-random sequence or other ZC sequences. For example, if the second cell is an adjacent cell of the first cell, then the second cell can be configured to carry the overlaid sequence using information bit 0 of the three newly added information bits. Then the value of information bit 0 to information bit 2 is

[0100] (not shown in the figure). In some embodiments, the base station may also determine the bit position carrying the overlaid sequence in the newly added information bits based on the cell ID of the cell, that is, determine the newly added information bits corresponding to the identification information of the first cell. In one example, the cellid of the cell can be moduloed by N, and the position of the bit carrying the overlaid sequence in the newly added information bits can be determined based on the result. For example, if the cellid of the first cell is 8 and N is 3, then the modulo operation of 8 by 3 can be obtained as 2, indicating that information bit 2 can carry the overlaid sequence, and the value of information bit 0 to information bit 2 is

[0001] . It should be noted that the number of N values ​​can be determined based on the number of overlaid sequences. If there are many overlaid sequences in a cell, N can be increased. The number of N values ​​can also be determined based on the number of cells. If there are many cells, N can be increased. This application does not impose a limit on N and it can be configured flexibly. It should be noted that using the cell ID to determine the bit position carrying the overlaid sequence in the newly added information bits is only an example. Alternatively, a bearer position ID can be assigned to each cell, and this ID can be used to determine the bit position carrying the overlaid sequence in the newly added information bits for each cell. For detailed implementation methods, please refer to the above description of determining the bit position carrying the overlaid sequence in the newly added information bits using the cell ID; it will not be repeated here. S802: The number of new information bits sent by the base station to the terminal. In the example where the base station assigns a bearer location ID to each cell, the bearer location ID can be pre-sent to the terminal by the base station, or it can be sent by the base station to the terminal at the same time when sending the number of new information bits. S803: The base station modulates the original information bits to obtain LPWUS. In some embodiments, during the initial encoding of the original information bits, or during the initial encoding and scrambling process, the base station may not need to process the newly added information bits, but only process the original information bits. This will be used as an example in the following description. Furthermore, in some implementations, the base station may perform the same processing on newly added information bits during the initial encoding of the original information bits, or during the initial encoding and scrambling process, and this application does not limit this. As shown in Figure 9, assuming N is 3 and the number of original information bits is 6, the last 6 information bits can be initially encoded and scrambled. [010111000] can be used to obtain [010011010100101011010], which means that the newly added information bits can be directly used as digital signals. It should be noted that the above example of adding the new information bits before the original information bits is only an example. Alternatively, the new information bits can be added to the digital signal after the digital signal is obtained. This application does not limit the time of adding the new information bits. S804: The base station sends LPWUS to the terminal. It should be noted that the implementation of S803-S804 can be found in the implementation of S301-S304 in Embodiment 1. That is to say, Embodiment 3 can also be executed in conjunction with the embodiments. Furthermore, in some embodiments, S803-S804 can also be implemented using conventional techniques, meaning that Embodiment 3 can be executed independently. S805: The terminal receives LPWUS based on the number of newly added information bits. In an example where the base station can configure different location indexes for different cells, the terminal can first determine the number of newly added information bits based on N, and then detect the overlaid sequence at the bit position with a value of 1 in the newly added information bits and demodulate it to restore the original information bits. In the example of determining the bit position carrying the overlaid sequence in the newly added information bits based on the cell ID (or bearer location ID) of the cell, the base station can first determine the number of newly added information bits based on N, and then determine the bit position carrying the overlaid sequence based on the cell ID (or bearer location ID) of its own first cell (that is, determine the bearer position corresponding to the newly added information bit with a value of 1 in LPWUS), and detect the overlaid sequence at this bit position and demodulate it to restore the original information bits. As shown in Figure 9, assuming the terminal determines N to be 3, the overlaid sequence can be detected from the second bit position (i.e., bit1) and demodulated to restore the original information bits. As can be seen from the above, Embodiment 3 can add information bits and determine the bit positions carrying overlaid sequences in the added information bits for different cells, so that the terminal can demodulate the overlaid sequence at the determined bit positions. This can not only increase the difference in time and frequency resources used by the final generated LPWUS and the LPWUS of other cells, but also reduce the occurrence of terminal mismodulation to a certain extent, thus saving network resources. This application also provides a computer-readable storage medium storing a computer program, which, when executed by a computer, can implement one or more steps of any of the above-described methods for sending or receiving low-power wake-up signals. Computer-readable storage media can be non-transitory computer-readable storage media, such as ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage devices. Another embodiment of this application provides a computer program product containing instructions. When the computer program product is executed by a computer, it can implement one or more steps of any of the above-described methods for sending or receiving low-power wake-up signals. The electronic device, computer-readable storage medium, and computer program product provided in this embodiment are all used to execute the corresponding low-power wake-up signal transmission method or low-power wake-up signal reception method provided above. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the corresponding low-power wake-up signal transmission method or low-power wake-up signal reception method provided above, and will not be repeated here. The terms "first," "second," and "third," etc., used in this application specification, claims, and drawings are used to distinguish different objects, not to limit a specific order. In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner. The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for transmitting a low-power wake-up signal, characterized in that, Applied to network devices, the method includes: Based on the first information, a low-power wake-up signal LPWUS is generated. Wherein, the first information is used to scramble the information bits of the LPWUS; and / or, the first information is used to determine the carrying position of the superimposed sequence in the LPWUS, the superimposed sequence being used to carry the information bits of the LPWUS; Send the LPWUS to the terminal.

2. The method according to claim 1, characterized in that, When the first information is used to scramble the information bits of the LPWUS, the first information includes a first sequence.

3. The method according to claim 2, characterized in that, The terminal belongs to the first cell; the first sequence includes the first sequence of the first cell, or a predefined first sequence for the first cell, or a first sequence selected based on the identification information of the first cell.

4. The method according to claim 1, characterized in that, When the first information is used to determine the bearer position of the superimposed sequence, the first information includes a first number of bearer position combinations, the first number being an integer greater than 1, and each bearer position combination includes at least one high level of the LPWUS; the method further includes: The first quantity is sent to the terminal.

5. The method according to claim 4, characterized in that, The terminal belongs to the first cell; the step of generating a low-power wake-up signal LPWUS based on the first information includes: Based on the first quantity and the identification information of the first cell, the target bearer location combination corresponding to the first cell is determined from the bearer location combination of the first quantity; The superimposed sequence is modulated and combined with a high level at the target bearer location to generate the LPWUS.

6. The method according to claim 1, characterized in that, When the first information is used to determine the bearer position of the superimposed sequence, the first information includes a second number of bearer positions in the bearer position combination, the second number being an integer greater than 1, and each bearer position includes at least one high level of the LPWUS; the method further includes: The second quantity is sent to the terminal.

7. The method according to claim 6, characterized in that, The terminal belongs to the first cell; the step of generating a low-power wake-up signal LPWUS based on the first information includes: Based on the second quantity and the identification information of the first cell, the target bearer location corresponding to the first cell is determined from the bearer locations of the second quantity in the bearer location combination; The superimposed sequence is modulated to a high level at the target carrier position to generate the LPWUS.

8. The method according to claim 4 or 5, characterized in that, The method further includes: Send a second message to the terminal; the second message is used to indicate the target bearer position combination that carries the superimposed sequence in the first number of bearer position combinations.

9. The method according to claim 8, characterized in that, The second information includes first sub-information, which is used to indicate that the corresponding bearing position combination is the target bearing position combination.

10. The method according to claim 9, characterized in that, The second information also includes a second sub-information, which indicates that the corresponding carrier position combination was not used to carry the superimposed sequence.

11. The method according to claim 6 or 7, characterized in that, The method further includes: Send a second message to the terminal; the second message is used to indicate the target bearer position carrying the superimposed sequence in a second number of bearer positions in the bearer position combination.

12. The method according to claim 11, characterized in that, The second information includes a third sub-information, which is used to indicate that the corresponding bearing position in the bearing position combination is the target bearing position.

13. The method according to claim 12, characterized in that, The second information also includes a fourth sub-information, which indicates that the corresponding bearing position in the bearing position combination is not used to bear the superimposed sequence.

14. The method according to claim 1, characterized in that, When the first information is used to determine the carrying position of the superimposed sequence, the first information includes a third number of bits added for the LPWUS, the third number being an integer greater than 1; the carrying position corresponding to the third number of added bits in the LPWUS is used to carry the superimposed sequence. The method further includes: The third quantity is sent to the terminal.

15. The method according to claim 14, characterized in that, The newly added bit includes a bit with a first value and a bit with a second value. The first value is used to indicate that the corresponding bearer position of the newly added bit in the LPWUS is used to carry the superposition sequence, and the second value is used to indicate that the corresponding bearer position of the newly added bit in the LPWUS is not used to carry the superposition sequence.

16. The method according to claim 15, characterized in that, The terminal belongs to the first cell, and the method further includes: From the third number of newly added bits, determine the newly added bits corresponding to the identification information of the first cell; In the third number of newly added bits, the newly added bit corresponding to the identification information of the first cell is set to the first value, and the remaining newly added bits are set to the second value.

17. The method according to any one of claims 1-16, characterized in that, The terminal belongs to the first cell, and the method further includes: From a plurality of preset sequences, the preset sequence corresponding to the first cell is determined as the overlay sequence.

18. The method according to any one of claims 1-16, characterized in that, The LPWUS includes Orthogonal Frequency Division Multiplexing (OFDM) symbols, and the method further includes: From a plurality of preset sequences, the preset sequence corresponding to the symbol index of the OFDM symbol is selected as the superposition sequence.

19. The method according to any one of claims 1-18, characterized in that, The terminal belongs to the first cell, and sending the LPWUS to the terminal includes: At the time-frequency resource location corresponding to the first cell, the LPWUS is sent to the terminal.

20. A method for receiving a low-power wake-up signal, characterized in that, Applied to a terminal, the method includes: Based on the first information, the low-power wake-up signal LPWUS from the network device is received; Wherein, the first information is used to scramble the information bits of the LPWUS; and / or, the first information is used to determine the carrying position of the superimposed sequence in the LPWUS, the superimposed sequence being used to carry the information bits of the LPWUS.

21. The method according to claim 20, characterized in that, When the first information is used to scramble the information bits of the LPWUS, the first information includes a first sequence; the receiving of the low-power wake-up signal LPWUS from the network device based on the first information includes: Based on the first sequence, the signal sequence corresponding to the LPWUS is descrambled to obtain the information bits of the LPWUS.

22. The method according to claim 20, characterized in that, When the first information is used to determine the bearer position of the superimposed sequence, the first information includes a first number of bearer position combinations, the first number being an integer greater than 1, and each bearer position combination includes at least one high level of the LPWUS; the method further includes: Receive a first quantity from the network device.

23. The method according to claim 22, characterized in that, The terminal belongs to the first cell; the receiving of the low-power wake-up signal LPWUS from the network device based on the first information includes: Based on the first quantity and the identification information of the first cell, the target bearer location combination corresponding to the first cell is determined from the bearer location combination of the first quantity; The superimposed sequence is obtained by demodulating the high-level signals included in the target bearing position combination.

24. The method according to claim 20, characterized in that, When the first information is used to determine the bearer position of the superimposed sequence, the first information includes a second number of bearer positions in the bearer position combination, the second number being an integer greater than 1, and each bearer position includes at least one high level of the LPWUS; the method further includes: Receive a second quantity from the network device.

25. The method according to claim 24, characterized in that, The terminal belongs to the first cell; the receiving of the low-power wake-up signal LPWUS from the network device based on the first information includes: Based on the second quantity and the identification information of the first cell, the target bearer location corresponding to the first cell is determined from the bearer locations of the second quantity in the bearer location combination; The superimposed sequence is obtained by demodulating the high level included in the target bearing position.

26. The method according to claim 22, characterized in that, The terminal belongs to the first cell; the method further includes: Receive second information from the network device; the second information is used to indicate the target bearer location combination carrying the superimposed sequence among the first number of bearer location combinations; The step of receiving the Low Power Wake-up Signal (LPWUS) from the network device based on the first information includes: Based on the first quantity and the second information, the target bearer location combination corresponding to the first cell is determined from the bearer location combination of the first quantity; The superimposed sequence is obtained by demodulating the high-level signals included in the target bearing position combination.

27. The method according to claim 24, characterized in that, The terminal belongs to the first cell; the method further includes: Receive second information from the network device; the second information is used to indicate the target bearer location carrying the superimposed sequence among a second number of bearer locations in the bearer location combination; The step of receiving the Low Power Wake-up Signal (LPWUS) from the network device based on the first information includes: Based on the second quantity and the second information, the target bearer location corresponding to the first cell is determined from the second quantity of bearer locations in the bearer location combination; The superimposed sequence is obtained by demodulating the high level included in the target bearing position.

28. The method according to claim 20, characterized in that, When the first information is used to determine the carrying position of the superimposed sequence, the first information includes a third number of bits added for the LPWUS, the third number being an integer greater than 1; the carrying position corresponding to the third number of added bits in the LPWUS is used to carry the superimposed sequence. The method further includes: Receive a third quantity from the network device.

29. The method according to claim 28, characterized in that, The newly added bit includes a bit with a first value and a bit with a second value. The first value is used to indicate that the corresponding bearer position of the newly added bit in the LPWUS is used to carry the superposition sequence, and the second value is used to indicate that the corresponding bearer position of the newly added bit in the LPWUS is not used to carry the superposition sequence. The step of receiving the Low Power Wake-up Signal (LPWUS) from the network device based on the first information includes: The additional bits for the LPWUS are determined based on the third quantity; The superposition sequence is obtained by demodulating the corresponding bearer position in LPWUS of the newly added bit with the value of the first value.

30. A communication device, characterized in that, The communication device includes a processing unit and a transceiver unit. The device is configured to perform the receiving and transmitting method of the low-power wake-up signal as described in any one of claims 1 to 19. Alternatively, the method for receiving a low-power wake-up signal as described in any one of claims 20 to 29.

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