Method for determining bearing mode of superposed sequence and related device

Abstract

The invention provides a method for determining a superposition sequence bearing mode and a related device, and relates to the technical field of communication. The method can be applied to a network device, and the method comprises the steps that the network device configures first information of a low power consumption wakeup signal LPWUS, and the first information is used for indicating parameters of the LPWUS; then, the network equipment sends first information to the terminal; the network equipment determines a superposition sequence bearing mode based on the first information; and finally, the network equipment sends a first signal to the terminal, wherein the first signal is generated based on the superposition sequence bearing mode. Thus, the network device can flexibly determine the superposed sequence bearing mode based on the first information, and compared with a fixed superposed sequence bearing mode adopted in the related technology, the flexibility of determining the superposed sequence bearing mode can be improved.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a method and related apparatus for determining the superimposed sequence carrying mode. Background Technology

[0002] To reduce power consumption, 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, establishing a communication connection between the terminal and the network side, thereby enabling service transmission and reception.

[0003] In related technologies, the network side can send LPWUS modulated based on an overlapping sequence (called an overlaid sequence) to the terminal. The overlaid sequence may not carry any LPWUS information bits, may carry some of the LPWUS information bits, or may carry all of the LPWUS information bits. However, when the number of LPWUS information bits is configurable, a fixed overlaid sequence is usually used. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a method and related apparatus for determining the overlaid sequence carrying method, with the aim of flexibly selecting the overlaid sequence carrying method.

[0005] In a first aspect, this application provides a method for determining the superimposed sequence bearer mode, which can be applied to network devices, such as base stations. In this method, the network device can configure first information of the Low Power Wake-up Signal (LPWUS), which is used to indicate the parameters of LPWUS. For example, the first information may include one or more of the following: the number of information bits of LPWUS, the number of OFDM symbol-carried modulation symbols, and the number of high-level signals in the first signal. The network device can send the first information to the terminal. Then, based on the first information, the network device can determine the superimposed sequence bearer mode. For example, the superimposed sequence bearer mode may include superimposed sequences that do not carry LPWUS information bits, superimposed sequences that carry some LPWUS information bits, superimposed sequences that carry all LPWUS information bits, etc. Subsequently, the network device can send a first signal to the terminal, which is generated based on the superimposed sequence bearer mode. The network device can generate the first signal based on the determined superimposed sequence bearer mode.

[0006] Thus, the network device can determine the superimposed sequence bearer method based on the first information, indicating that the network device can flexibly determine the superimposed sequence bearer method based on the first information. Compared with the fixed superimposed sequence bearer method used in related technologies, the superimposed sequence bearer method determination method provided in this application is more flexible for the superimposed sequence bearer method used.

[0007] In one possible implementation, the first information of LPWUS may include the number of LPWUS information bits. For example, the network device can configure the number of LPWUS information bits to be 4 or 8. This allows the network device to determine the overlay sequence carrying method based on the number of LPWUS information bits, providing greater flexibility.

[0008] In one possible implementation, the number of LPWUS information bits configured in the network device is less than or equal to a first threshold. For example, the first threshold can be 2, and the number of LPWUS information bits configured in the network device is 2. The first signal can be generated based on a first sequence or a random number. This first sequence does not carry LPWUS information bits, indicating that the superposition sequence determined by the network device based on the number of LPWUS information bits does not carry LPWUS information bits. For example, the first signal generated by the network device can be generated by modulation based on a first sequence without LPWUS information bits or a random number. Thus, with a smaller number of LPWUS information bits, the terminal can receive the complete first signal more quickly. The terminal can demodulate the high and low levels of the first signal, avoiding affecting the demodulation speed of the first signal, and without needing to demodulate the first sequence, reducing the consumption of computing resources.

[0009] In one possible implementation, the number of LPWUS information bits configured by the network device is greater than a first threshold and less than or equal to a second threshold. For example, the first threshold can be 2, the second threshold can be 4, and the number of LPWUS information bits configured by the network device is 3. The first signal can be generated based on a second sequence that carries all the information bits of LPWUS. This indicates that the superposition sequence carrying method determined by the network device based on the number of LPWUS information bits is a sequence that carries all the information bits of LPWUS. For example, the first signal generated by the network device can be generated by modulation based on the second sequence carrying all the information bits of LPWUS.

[0010] Thus, when the number of information bits in LPWUS is moderate, it indicates that the terminal may need a long time to receive the complete first signal. By using the superimposed sequence method of carrying all the information bits of LPWUS in the second sequence, the terminal can demodulate the second sequence to restore the complete information bits even if it has not received the complete first signal, which can improve the demodulation speed of the terminal for the first signal.

[0011] In one possible implementation, the number of LPWUS information bits configured in the network device is greater than a second threshold. For example, the second threshold can be 4, and the number of LPWUS information bits configured in the network device is 6. The first signal can be generated based on a third sequence that carries a portion of the LPWUS information bits. This indicates that the superposition sequence carrying method determined by the network device based on the number of LPWUS information bits is a sequence carrying a portion of the LPWUS information bits. For example, the first signal generated by the network device can be generated by modulation based on the third sequence carrying a portion of the LPWUS information bits.

[0012] Thus, when the number of LPWUS information bits is large, on the one hand, it can avoid the problem that the terminal has to wait for the complete first signal to recover the information bits because the third sequence does not carry LPWUS information bits, which can reduce the terminal's waiting time and improve the terminal's demodulation speed of the first signal; on the other hand, it can avoid the problem that the third sequence is more complex because it carries all the LPWUS information bits, which can improve the terminal's demodulation speed and demodulation accuracy of the first signal.

[0013] In one possible implementation, the first information of LPWUS includes the number of modulation symbols carried by the OFDM symbols, and the first signal includes modulation symbols. For example, the first signal includes both ON and OFF modulation symbols, and the network device can be configured to carry one, two, four, or more modulation symbols using the OFDM symbols. This allows the network device to determine the overlay sequence carrying method based on the number of modulation symbols carried by the OFDM symbols, providing greater flexibility.

[0014] In one possible implementation, the number of OFDM symbols carried by the network device is less than or equal to a third threshold. For example, the third threshold can be 1, and the number of OFDM symbols carried by the network device is 1. The first signal can be generated based on a fourth sequence that carries some information bits of LPWUS. This indicates that the superposition sequence carrying method determined by the network device based on the number of OFDM symbols carried by the network device is a sequence carrying some information bits of LPWUS. For example, the first signal generated by the network device can be generated by modulation based on the fourth sequence carrying some information bits of LPWUS.

[0015] Thus, the length of an OFDM symbol is fixed, and its duration is fixed. When an OFDM symbol carries fewer modulation symbols, it indicates that the transmission speed of the first signal is slower. The first signal uses fourth sequence modulation carrying part of the information bits, which allows the terminal to demodulate and restore the LPWUS information bits without waiting for a long time, thereby improving the terminal's demodulation speed for LPWUS.

[0016] In one possible implementation, the number of modulation symbols carried by the OFDM symbols configured by the network device is greater than a third threshold and less than or equal to a fourth threshold. For example, the third threshold can be 1 and the fourth threshold can be 2. The number of modulation symbols carried by the OFDM symbols configured by the network device is 2. The first signal can be generated based on a fifth sequence, which carries all the information bits of LPWUS. This indicates that the superposition sequence carrying method determined by the network device based on the number of modulation symbols carried by the OFDM symbols is a sequence carrying all the information bits of LPWUS. For example, the first signal generated by the network device can be generated by modulation based on the fifth sequence carrying all the information bits of LPWUS.

[0017] Thus, when an OFDM symbol carries a moderate number of modulation symbols, it indicates that the transmission speed of the first signal is moderate. The first signal uses the fifth sequence modulation that carries all information bits, so the terminal can obtain the fifth sequence as soon as possible to demodulate the LPWUS information bits. This also allows the terminal to wait less time and improves the terminal's demodulation speed for LPWUS.

[0018] In one possible implementation, the number of modulation symbols carried by the OFDM symbols configured by the network device is greater than a fourth threshold. For example, the fourth threshold can be 2, and the number of modulation symbols carried by the OFDM symbols configured by the network device is 4. The first signal can be generated based on a sixth sequence that does not carry LPWUS information bits, indicating that the superposition sequence carrying method determined by the network device based on the number of modulation symbols carried by the OFDM symbols is a sequence that does not carry LPWUS information bits. For example, the first signal generated by the network device can be generated by modulation based on the sixth sequence that does not carry LPWUS information bits.

[0019] Thus, when an OFDM symbol carries a large number of modulated signals, it indicates that the transmission speed of the first signal is faster. The first signal is obtained by modulation of the sixth sequence without carrying LPWUS information bits. The terminal does not need to wait long to receive the complete OOK modulated signal, and can then demodulate the LPWUS information bits, which can also improve the terminal's demodulation speed for LPWUS.

[0020] In one possible implementation, the first information of LPWUS may include the number of LPWUS information bits and the number of OFDM symbol-carried modulation symbols. For example, the network device may configure the number of LPWUS information bits to be 4 or 8, and the number of OFDM symbol-carried modulation symbols to be 1 or 2. This allows the network device to comprehensively consider the number of LPWUS information bits and the number of OFDM symbol-carried modulation symbols to determine the overlay sequence carrying method, further improving the flexibility in determining the overlay sequence carrying method.

[0021] In one possible implementation, the number of LPWUS information bits configured by the network device is less than or equal to a first threshold. For example, the first threshold can be 2, and the number of LPWUS information bits configured by the network device is 2. The number of modulation symbols carried by the OFDM symbols configured by the network device is less than or equal to a third threshold. For example, the third threshold can be 1, and the number of modulation symbols carried by the OFDM symbols configured by the network device is 1. The first signal can be generated based on a seventh sequence or a random number. The seventh sequence does not carry LPWUS information bits, indicating that the superimposed sequence carrying method determined by the network device based on the two is that the sequence does not carry LPWUS information bits.

[0022] Thus, even with a small number of LPWUS information bits and a slow transmission speed of the first signal, the terminal can still receive the complete first signal quickly. The terminal does not need to wait a long time to demodulate the LPWUS information bits, which avoids affecting the terminal's demodulation speed of LPWUS. Furthermore, there is no need to demodulate the seventh sequence, which reduces the consumption of computing resources.

[0023] In one possible implementation, the number of LPWUS information bits configured by the network device is greater than a first threshold and less than or equal to a second threshold. For example, the first threshold can be 2, the second threshold can be 6, and the number of LPWUS information bits configured by the network device is 4. The number of modulation symbols carried by the OFDM symbols configured by the network device is greater than a third threshold and less than or equal to a fourth threshold. For example, the third threshold can be 1, the fourth threshold can be 4, and the number of modulation symbols carried by the OFDM symbols configured by the network device is 4. The first signal can be generated based on an eighth sequence or a random number. The eighth sequence does not carry LPWUS information bits, indicating that the superimposed sequence carrying method determined by the network device based on the two is that the sequence does not carry LPWUS information bits.

[0024] Thus, with a moderate number of LPWUS information bits and a moderate transmission speed of the first signal, the terminal is likely to receive the complete first signal relatively quickly. Therefore, the terminal can wait for the complete first signal to demodulate and obtain the LPWUS information bits, which can avoid affecting the terminal's demodulation speed of LPWUS and eliminate the need to demodulate the eighth sequence, thereby reducing the consumption of computing resources.

[0025] In one possible implementation, the number of LPWUS information bits configured by the network device is greater than a second threshold. For example, the second threshold can be 6, and the number of LPWUS information bits configured by the network device is 8. The number of OFDM symbols carrying modulation symbols configured by the network device is greater than a fourth threshold. For example, the fourth threshold can be 4, and the number of OFDM symbols carrying modulation symbols configured by the network device is 6. The first signal can be generated based on a ninth sequence, which carries a portion of the LPWUS information bits, indicating that the superimposed sequence carrying method determined by the network device based on the two is a sequence carrying a portion of the LPWUS information bits.

[0026] Thus, when the number of information bits in LPWUS is large, using this superimposed sequence carrying method can avoid the terminal waiting for the complete first signal for too long, thus avoiding affecting the terminal's demodulation speed of the first signal. At the same time, it avoids the terminal demodulating the more complex sequence carrying all information bits, but instead demodulates the ninth sequence carrying part of the information bits, which can ensure the accuracy of the terminal's demodulation of LPWUS.

[0027] In one possible implementation, when the first information of LPWUS includes the number of LPWUS information bits, the method for determining the superimposed sequence bearer mode may further include: determining the number of high-level signals in the first signal based on the number of LPWUS information bits, wherein the number of high-level signals is equal to the number of ON symbols in the first signal. For example, Manchester encoding can be used to encode the LPWUS information bits into a digital signal. In this encoding method, the number of LPWUS information bits is the same as the number of high-level signals in the first signal. Alternatively, other encoding methods can be used, such that the number of high-level signals in the first signal is related to the number of LPWUS information bits. Thus, the network device can determine the superimposed sequence bearer mode based on the number of high-level signals in the first signal, providing greater flexibility.

[0028] In one possible implementation, the first information of LPWUS may include the number of high-level signals in the first signal. For example, the network device can encode the LPWUS information bits into a digital signal and then determine the number of high-level signals in the first signal based on the number of high-level signals in the digital signal. This allows the network device to determine the superposition sequence carrying method based on the number of high-level signals in the first signal, providing greater flexibility.

[0029] In one possible implementation, the number of high levels in the first signal is less than or equal to a fifth threshold. For example, the fifth threshold can be 4, the number of high levels in the first signal is 2, and the first signal can be generated based on a tenth sequence or a random number. The tenth sequence does not carry LPWUS information bits, indicating that the superimposed sequence carrying method determined by the network device based on the number of high levels in the first signal is a sequence that does not carry LPWUS information bits. For example, the first signal generated by the network device can be generated by modulation based on a tenth sequence that does not carry LPWUS information bits or a random number.

[0030] Thus, with fewer high-level signals in the first signal, the terminal can receive the complete first signal more quickly. The terminal can demodulate the high and low levels of the first signal, avoiding affecting the demodulation speed of the first signal. Furthermore, there is no need to demodulate the tenth sequence, which reduces the consumption of computing resources.

[0031] In one possible implementation, the number of high-level signals in the first signal is greater than a fifth threshold and less than or equal to a sixth threshold. For example, the fifth threshold can be 4, the sixth threshold can be 8, and the number of high-level signals in the first signal is 6. The first signal can be generated based on an eleventh sequence, which carries all the information bits of LPWUS. This indicates that the superimposed sequence carrying method determined by the network device based on the number of high-level signals in the first signal is a sequence that carries all the information bits of LPWUS. For example, the first signal generated by the network device can be generated by modulation based on the eleventh sequence that carries all the information bits of LPWUS.

[0032] Thus, when the number of high-level signals in the first signal is moderate, it indicates that the terminal may need a long time to receive the complete first signal. Using the superimposed sequence carrying method of the eleventh sequence carrying all the information bits of LPWUS makes it easier for the terminal to demodulate the eleventh sequence to recover the complete information bits even if it has not received the complete first signal, thereby improving the demodulation speed of the terminal for the first signal.

[0033] In one possible implementation, the number of high levels in the first signal is greater than a sixth threshold. For example, the sixth threshold can be 8, the number of high levels in the first signal is 10, and the first signal can be generated based on a twelfth sequence that carries some information bits of LPWUS. This indicates that the superimposed sequence carrying method determined by the network device based on the number of high levels in the first signal is a sequence carrying some information bits of LPWUS. For example, the first signal generated by the network device can be generated by modulation based on the twelfth sequence carrying some information bits of LPWUS.

[0034] Thus, when there are a large number of high-level signals in the first signal, on the one hand, it can avoid the problem that the terminal has to wait for the complete first signal to recover the information bits because the twelfth sequence does not carry the LPWUS information bits, thereby reducing the terminal's waiting time and improving the terminal's demodulation speed for the first signal; on the other hand, it can avoid the problem that the twelfth sequence is more complex because it carries all the LPWUS information bits, thereby improving the terminal's demodulation speed and demodulation accuracy for the first signal.

[0035] In one possible implementation, the first and second thresholds described above can be configured by the network device, or they can be predefined. If the first and second thresholds are configured by the network device, their configuration flexibility is greater; if they are predefined, determining the overlay sequence bearer method is more convenient.

[0036] In one possible implementation, the third and fourth thresholds described above can be configured by the network device, or they can be predefined. If the third and fourth thresholds are configured by the network device, their configuration flexibility is greater; if they are predefined, determining the overlay sequence bearer method is more convenient.

[0037] In one possible implementation, the fifth and sixth thresholds described above can be configured by the network device, or they can be predefined. If the fifth and sixth thresholds are configured by the network device, their configuration flexibility is greater; if they are predefined, determining the overlay sequence bearer method is more convenient.

[0038] Secondly, this application provides a method for determining the superimposed sequence bearer mode, which can be applied to a terminal. The method includes: the terminal receiving first information of LPWUS sent by a network device, the first information being used to indicate parameters of LPWUS. For example, the first information may include one or more of the following: the number of information bits of LPWUS, the number of OFDM symbol bearer modulation symbols, and the number of high levels in a first signal; then the terminal can determine the superimposed sequence bearer mode based on the first information; finally, the terminal can receive a first signal sent by the network device, the first signal being generated based on the superimposed sequence bearer mode.

[0039] In this way, network devices can determine the superimposed sequence bearing method based on the first information, and terminals can also determine the superimposed sequence bearing method based on the first information. The superimposed sequence bearing method can be flexibly determined, which makes it easier for terminals to accurately demodulate the first signal.

[0040] In one possible implementation, the first information of LPWUS includes the number of LPWUS information bits. Based on this first information, the overlay sequence carrying method is determined, which may include: determining the overlay sequence carrying method based on the number of LPWUS information bits, a first threshold, and a second threshold. This allows network devices to determine the overlay sequence carrying method based on the number of LPWUS information bits, providing greater flexibility.

[0041] In one possible implementation, the first information of LPWUS includes the number of modulation symbols carried by OFDM symbols. Based on this first information, the overlay sequence carrying method is determined, which may include: determining the overlay sequence carrying method based on the number of modulation symbols carried by OFDM symbols, a third threshold, and a fourth threshold. This allows network devices to determine the overlay sequence carrying method based on the number of modulation symbols carried by OFDM symbols, providing greater flexibility.

[0042] In one possible implementation, the first information of LPWUS includes the number of information bits in LPWUS and the number of modulation symbols carried by OFDM symbols. Based on the first information, the superposition sequence carrying method is determined, which may include: determining the superposition sequence carrying method based on the number of information bits in LPWUS, the number of modulation symbols carried by OFDM symbols, a first threshold, a second threshold, a third threshold, and a fourth threshold. This allows network devices to comprehensively consider the number of information bits in LPWUS and the number of modulation symbols carried by OFDM symbols to determine the superposition sequence carrying method, further improving the flexibility in determining the superposition sequence carrying method.

[0043] In one possible implementation, the first information of LPWUS includes the number of high-level signals in the first signal. Based on this first information, the superposition sequence carrying method is determined, which may include determining the superposition sequence carrying method based on the number of high-level signals in the first signal, a fifth threshold, and a sixth threshold. In this way, the network device can determine the superposition sequence carrying method based on the number of high-level signals in the first signal, providing greater flexibility.

[0044] In one possible implementation, the first and second thresholds described above can be configured by the network device and sent to the terminal, or the first and second thresholds can be predefined. Thus, if the first and second thresholds are configured by the network device, their configuration flexibility is greater; if the first and second thresholds are predefined, determining the overlay sequence carrying method is more convenient.

[0045] In one possible implementation, the third and fourth thresholds described above can be configured by the network device and sent to the terminal, or they can be predefined. If the third and fourth thresholds are configured by the network device, their configuration flexibility is greater; if they are predefined, determining the overlay sequence bearer method is more convenient.

[0046] In one possible implementation, the fifth and sixth thresholds described above can be configured by the network device and sent to the terminal, or they can be predefined. If the fifth and sixth thresholds are configured by the network device, their configuration flexibility is greater; if they are predefined, determining the overlay sequence bearer method is more convenient.

[0047] Thirdly, this application provides a system for determining an overlay sequence bearer mode. This system may include a network device and a terminal. The network device is used to configure first information for LPWUS, the first information indicating LPWUS parameters. Then, the network device is used to send the first information to the terminal. The terminal is used to receive the first information sent by the network device. Subsequently, the network device is used to determine the overlay sequence bearer mode based on the first information. The terminal is used to determine the overlay sequence bearer mode based on the first information. Finally, the network device is used to send a first signal to the terminal, the first signal being generated based on the overlay sequence bearer mode. The terminal is used to receive the first signal sent by the network device.

[0048] Fourthly, this application provides a communication device, which includes a processing unit and a transceiver unit, for performing the method for determining the superimposed sequence bearer mode described in the first to second aspects.

[0049] Fifthly, this application provides a communication device including a processor coupled to a memory, the memory storing a program or instructions for performing the method for determining the superimposed sequence carrying mode as described in the first to second aspects above.

[0050] In a sixth aspect, this application provides a computer-readable storage medium storing a computer program or instructions, which, when executed, cause the method for determining the superimposed sequence carrying method as described in the first to second aspects to be performed.

[0051] In a seventh aspect, this application provides a communication system including the communication device described in the fourth aspect above.

[0052] Eighthly, this application provides a computer program product, which includes a computer program that, when run, causes the method for determining the superimposed sequence carrying method of the first to second aspects to be executed. Attached Figure Description

[0053] Figure 1 This application provides a schematic diagram of the structure of a communication system according to an embodiment of the present application.

[0054] Figure 2a A schematic diagram of an OOK modulated signal provided in an embodiment of this application;

[0055] Figure 2b This is a schematic diagram illustrating the modulation of OFDM symbols using OOK-1 modulation, as provided in an embodiment of this application.

[0056] Figure 2cThis is a schematic diagram illustrating the modulation of OFDM symbols using OOK-4 modulation, as provided in an embodiment of this application.

[0057] Figure 3 Signaling interaction diagram of a method for determining the superimposed sequence bearer mode provided in an embodiment of this application;

[0058] Figure 4 A schematic diagram of a transmitted OOK modulated signal provided in an embodiment of this application;

[0059] Figure 5 A schematic diagram of an OFDM symbol provided in an embodiment of this application;

[0060] Figure 6 Signaling interaction diagram of another method for determining the superimposed sequence bearer mode provided in the embodiments of this application;

[0061] Figure 7 A schematic diagram of another transmitted OOK modulated signal provided in an embodiment of this application;

[0062] Figure 8 Signaling interaction diagram of another method for determining the superimposed sequence bearer mode provided in the embodiments of this application;

[0063] Figure 9 Signaling interaction diagram of another method for determining the superimposed sequence bearer mode provided in the embodiments of this application. Detailed Implementation

[0064] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0065] 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.

[0066] In this application embodiment, one example of a communication system may be as follows: Figure 1 As shown, Figure 1 It includes base station 101 and terminal 102.

[0067] 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.

[0068] 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.

[0069] It should be noted that the above Figure 1 The communication system shown is merely an example; in practical applications, the communication system may include more numbers or types of devices. This application does not limit the specific architecture of the communication system.

[0070] In practical applications, the network side can first encode the LPWUS information bits (hereinafter referred to as information bits) into digital signals, and then modulate the digital signals into OOK modulated 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 transmission signal and send it to the terminal.

[0071] When the overlaid sequence carries all the information bits of LPWUS, the terminal can recover the LPWUS information bits by demodulating only the overlaid sequence or by demodulating only the OOK modulation signal. When the overlaid sequence carries some of the LPWUS information bits, the terminal can recover the LPWUS information bits by demodulating both the overlaid sequence and the OOK modulation signal. When the overlaid sequence does not carry any LPWUS information bits, the terminal can recover the LPWUS information bits by demodulating the OOK modulation signal.

[0072] However, the network side usually uses a fixed overlaid sequence carrying method. For example, when the number of information bits in LPWUS is configurable or not fixed, a fixed overlaid sequence carrying method is used. The choice of overlaid sequence carrying method is not flexible enough.

[0073] To address the aforementioned issues, this application provides a method for determining the overlaid sequence carrying method, aiming to flexibly select the overlaid sequence carrying method. This method takes into account variations in the number of information bits in LPWUS, variations in the modulation scheme of LPWUS, or variations in the number of ON symbols in the OOK modulated signal, enabling flexible selection of the overlaid sequence carrying method.

[0074] First, we will introduce the process of converting LPWUS information bits into OOK modulated signals.

[0075] Taking LPWUS using a bitmap to indicate subgroups as an example, each information bit of LPWUS can correspond to one subgroup, and one subgroup can include one or more terminals. The value of the information bit is 1, which indicates that the corresponding subgroup is indicated and the terminals included therein will be woken up; the value of the information bit is 0, which indicates that the corresponding subgroup is not indicated and the terminals included therein will not be woken up. Assuming that the network side needs to wake up 4 terminals, one subgroup can include 2 terminals, and there will be 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 information bits of LPWUS can be 2, including bit1-bit2. The value of bit1-bit2 is

[11] , which indicates that terminals 1 to 4 will be woken up.

[0076] Taking LPWU's codepoint-based subgroup indicator 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 LPWUS information bits can be 1. A value of 0 for bit 1 indicates that subgroup 1 includes terminals 1 and 2, and terminals 1 and 2 will be woken up. A value of 1 for bit 1 indicates that subgroup 2 includes terminals 3 and 4, and terminals 3 and 4 will be woken up.

[0077] It should be noted that the following embodiments may use LPWUS with bitmap as an example to introduce the method for determining the superimposed sequence carrying method provided in the embodiments of this application, and this application does not limit it.

[0078] The network side can encode the information bits of LPWUS to obtain digital signals. Taking Manchester encoding as an example, Manchester encoding will encode the value 1 as a high-to-low level transition and 0 as a low-to-high level transition. 1 can represent a high level and 0 can represent a low level. Assuming the value of the information bit is

[11] , it can be encoded as

[1010] .

[0079] It should be noted that the use of Manchester encoding to encode the information bits of LPWUS is only an example. Other encoding methods such as Pulse Interval Encoding (PIE) can also be used, and this application does not limit this.

[0080] 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 an OOK modulated signal (also known as an OOK modulated carrier signal). Finally, the network side sends this OOK modulated signal to the terminal. The OOK modulated signal is as follows: Figure 2a As shown, the OOK modulation signal includes modulation symbols: ON symbol and OFF symbol. The ON symbol in the OOK modulation signal (indicates that the carrier is started, OOK=1) represents a high level and carries the 1 in the digital signal. The OFF symbol in the OOK modulation signal (indicates that the carrier is turned off, OOK=0) represents a low level and carries the 0 in the digital signal. Figure 2a The OOK modulated signal shown contains the following digital signal:

[1010] , which also contains the following information bits:

[11] .

[0081] Based on this, in order to make the spectrum of the OOK modulated signal flatter when it is transmitted, an overlaid sequence can be introduced to modulate the digital signal, generating the final OOK modulated signal (also known as the first signal) and sending it to the terminal.

[0082] In some embodiments, the overlaid sequence can be a pseudo-random sequence such as a Gold sequence or an M sequence, or it can be other sequences such as a ZC sequence. This application does not limit the types of overlaid sequences.

[0083] Overlaid sequences have two modulation schemes: OOK-1 modulation and OOK-4 modulation.

[0084] The OOK-1 modulation method is as follows: Figure 2b As shown, Figure 2bFrom the perspective of the frequency domain, an OFDM symbol is described after being modulated by the OOK-1 modulation method. 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.

[0085] like Figure 2b As shown, 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 final OOK modulated signal sent from the network side to the terminal is obtained based on the overlaid sequence modulation.

[0086] The OOK-4 modulation method is as follows: Figure 2c As shown, Figure 2c This describes an OFDM symbol after OOK-4 modulation from a time-domain perspective, with M-bit OOK transformations in the time domain. Figure 2c The number of chips 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.

[0087] like Figure 2c As shown, 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 the 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-bit 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 final OOK modulated signal sent by the network side to the terminal is obtained based on overlaid sequence modulation.

[0088] It should be noted that, Figure 2c M=4 is just an example; M can also be different values ​​such as 1, 2, 4, 8, etc.

[0089] Next, we will continue to introduce the methods of carrying information bits in overlaid sequences. Overlaid sequence carrying methods can include the following:

[0090] Overlaid sequence carrying mode 1 is an overlaid sequence that does not carry LPWUS information bits.

[0091] For example, if the overlaid sequence is a pseudo-random sequence, and the terminal receives an OOK modulated signal, the ON symbol in the OOK modulated signal can carry a pseudo-random sequence. In this case, the terminal needs to demodulate the OOK modulated signal to recover the LPWUS information bits. That is, after receiving the complete OOK modulated signal, the terminal can recover the complete digital signal, and then recover the complete information bits. For example, the pseudo-random sequence can be [01010101], which can represent generating a high level.

[0092] Overlaid sequence carrying method 2 is an overlaid sequence that carries all the information bits of LPWUS.

[0093] For example, an overlaid sequence carries three bits of a digital signal: 000 corresponds to overlaid sequence 1, 001 corresponds to overlaid sequence 2, 010 corresponds to overlaid sequence 3, and so on, with 111 corresponding to overlaid sequence 8.

[0094] Assuming the digital signal is [101010], and the terminal receives an OOK modulated signal, the first ON symbol in the OOK modulated signal can be obtained based on overlaid sequence 5, and the second ON symbol can be obtained based on overlaid sequence 2. In this case, the terminal can demodulate overlaid sequence 5 and overlaid sequence 2 to recover the complete information bits, or it can demodulate the high and low levels represented by the OOK modulated signal to recover the complete information bits.

[0095] like Figure 2a As shown, the ON symbol in the OOK modulated signal corresponds to one time length (also known as chip length), and the OFF symbol corresponds to one time length. The terminal can recover the complete digital signal [101010] after the third time length by demodulating the overlaid sequence 5 and overlaid sequence 2. The terminal can also recover the digital signal [101010] after the sixth time length by demodulating the OOK modulated signal.

[0096] Based on the above example, it is shown that when using overlaid sequence carrying method 2, the OOK modulation signal sent from the network side to the terminal can carry information bits in two ways, and the terminal can demodulate one or both of them to recover the information bits.

[0097] It should be noted that the statement that an overlaid sequence carries three bits of a digital signal (or that an overlaid sequence has 3 bits) is merely an example. An overlaid sequence can carry one bit, two bits, or more bits of a digital signal, and this application does not limit this.

[0098] Overlaid sequence carrying method 3 is an overlaid sequence carrying part of the LPWUS information bits.

[0099] For example, an overlaid sequence carries two bits of a digital signal: 00 corresponds to overlaid sequence 1, 01 corresponds to overlaid sequence 2, 10 corresponds to overlaid sequence 3, and 11 corresponds to overlaid sequence 4.

[0100] Assuming the digital signal is

[1010] , the overlaid sequence carries only two bits of the digital signal, while the OOK modulated signal carries the remaining two bits. The terminal receives the OOK modulated signal, which includes an ON symbol and an OFF symbol. The ON symbol can be modulated based on overlaid sequence 3. In this case, the terminal can demodulate overlaid sequence 3 and the high and low levels represented by the demodulated OOK modulated signal to recover the complete information bits.

[0101] The following example uses LPWUS information bits encoded using a bitmap and Manchester encoding as an example. Figures 3-9 The method for determining the superimposed sequence carrying method provided in this application is introduced.

[0102] Example 1:

[0103] It should be understood that when the network side, acting as the sender, transmits LPWUS to the terminal, both the network side and the terminal must adhere to predefined protocol specifications. This application adds new rules for determining the overlaid bearer mode within the predefined protocol specifications, enabling the network side and the terminal to select the corresponding overlaid sequence bearer mode based on these rules.

[0104] In one possible implementation, the rule for determining the overlaid bearer mode is related to the number of information bits in LPWUS, which can be referred to as a parameter of LPWUS.

[0105] In some embodiments, the number of information bits in LPWUS is 1, including number threshold 1. The rule 1 for determining the overlaid bearer mode can be: if the number of information bits in LPWUS does not exceed number threshold 1, overlaid sequence bearer mode 1 can be used; if the number of information bits in LPWUS exceeds number threshold 1 (also known as the number of information bits being greater than number threshold 1), overlaid sequence bearer mode 2 can be used.

[0106] In some embodiments, the number of LPWUS information bit thresholds can be two, including threshold 1 and threshold 2. The determination rule 2 for the overlaid bearer mode can be as follows: if the number of LPWUS information bits does not exceed threshold 1 (also known as less than or equal to the first threshold), overlaid sequence bearer mode 1 can be used; if the number of LPWUS information bits exceeds threshold 1 but does not exceed threshold 2 (also known as greater than the first threshold and less than or equal to the second threshold), overlaid sequence bearer mode 2 can be used; if the number of LPWUS information bits exceeds threshold 2 (also known as greater than the second threshold), overlaid sequence bearer mode 3 can be used.

[0107] It should be noted that the number of information bits in LPWUS mentioned above is only an example, and there may be more thresholds; the determination rules 1 and 2 for the overlaid bearer method mentioned above are only examples. For example, if the number of information bits in LPWUS exceeds the number threshold 1, the overlaid sequence bearer method 3 may be used. This application does not limit this.

[0108] Next, combined Figure 3 Taking the network side as the base station and the terminal including the main communication unit and the wake-up receiver unit as an example, this paper introduces the method for determining the superimposed sequence carrying method when the number of information bits of LPWUS is different.

[0109] like Figure 3 As shown, the method for determining the superimposed sequence carrying method may include the following steps:

[0110] S301: The base station is configured with the number of LPWUS information bits and the threshold for the number of LPWUS information bits.

[0111] In some embodiments, the number of information bits in LPWUS has a configurable range, and the base station can configure the number of information bits in LPWUS within the configurable range.

[0112] For example, the information bits of LPWUS are configurable from bit1 to bit8, that is, the number of information bits of LPWUS is configurable from 1 information bit to 8 information bits. For example, the base station can configure the number of information bits of LPWUS to be 4, including bit1 to bit4, or the base station can configure the number of information bits of LPWUS to be 6, including bit1 to bit6.

[0113] In some embodiments, the base station can configure a threshold for the number of information bits in LPWUS, and can configure the number of LPWUS information bit thresholds and the value of the LPWUS information bit threshold.

[0114] For example, the base station can configure the number of LPWUS information bits thresholds to be 2, including threshold 1 and threshold 2. The base station can configure the value of the LPWUS information bit thresholds, for example, the value of threshold 1 is 2 and the value of threshold 2 is 4.

[0115] In some embodiments, the base station may also configure only the value of the threshold for the number of information bits of LPWUS, which is not limited in this application.

[0116] It should be noted that the threshold for the number of LPWUS information bits configured in the base station is only an example. The threshold for the number of LPWUS information bits can also be predefined in the protocol specification, that is, threshold 1 and threshold 2 are predefined.

[0117] In some embodiments, this application may add a predefined threshold for the number of information bits in a predefined protocol specification. Taking the determination rule 1 of the overlaid bearer method described above as an example, the determination rule 1 of the overlaid bearer method may be: if the number of information bits of LPWUS does not exceed 2, the overlaid sequence bearer method 1 may be used; if the number of information bits of LPWUS exceeds 2, the overlaid sequence bearer method 2 may be used.

[0118] S302: The number of LPWUS information bits sent by the base station to the terminal and the threshold for the number of LPWUS information bits.

[0119] In one possible implementation, the base station can send the number of LPWUS information bits and a threshold for the number of LPWUS information bits to the terminal before establishing a communication connection with the terminal.

[0120] In some embodiments, before the base station establishes a communication connection with the terminal, the base station can send system information to the terminal through the Radio Resource Control (RRC) layer. This system information can carry indication information 1, which is used to indicate the number of information bits of LPWUS and the threshold for the number of information bits of LPWUS.

[0121] In another possible implementation, the base station can send the number of LPWUS information bits and the LPWUS information bit number threshold to the terminal during the process of establishing a communication connection with the terminal.

[0122] In some embodiments, during the process of establishing a communication connection between the base station and the terminal, the base station can send a Media Access Control Control Element (MACCE) to the terminal through the Media Access Control (MAC) layer. The MACCE can carry indication information 1.

[0123] In some embodiments, during the process of establishing a communication connection between the base station and the terminal, the base station can send downlink control information (DCI) to the terminal through the physical layer. The DCI can carry indication information 1.

[0124] Thus, in the above examples, the number of LPWUS information bits and the threshold for the number of LPWUS information bits are carried during the signaling interaction between the base station and the terminal. There is no need to send signaling to carry this information separately, which can reduce the signaling overhead between the base station and the terminal and reduce costs.

[0125] S303: The base station selects the corresponding overlaid sequence bearer mode based on the number of LPWUS information bits and the LPWUS information bit threshold.

[0126] Based on the above introduction, the predefined protocol specification adds rules for determining the overlaid bearer mode. The base station can select the corresponding overlaid sequence bearer mode from the predefined protocol specification based on the number of LPWUS information bits and the LPWUS information bit number threshold.

[0127] In some embodiments, the number of information bits thresholds of LPWUS is 2, including threshold 1 and threshold 2, which are 2 and 4 respectively. The base station can select the corresponding overlaid sequence bearer based on rule 2 for determining the overlaid bearer method described above.

[0128] For example, if the number of information bits in LPWUS is 2, the base station can select overlaid sequence carrying mode 1, where the overlaid sequence does not carry LPWUS information bits.

[0129] Thus, with fewer information bits in LPWUS, the terminal can receive the complete OOK modulated signal relatively quickly. Without affecting the terminal's demodulation speed for LPWUS, the terminal can demodulate only the OOK modulated signal without demodulating the overlaid sequence, which saves the terminal's computing resources.

[0130] For example, if the number of information bits in LPWUS is 4, the base station can choose overlaid sequence carrying mode 2, in which the overlaid sequence carries all the information bits of LPWUS.

[0131] Thus, when the information bits of LPWUS are of moderate size, it may take a long time for the terminal to receive the complete OOK modulated signal. By using an overlaid sequence to carry all the information bits of LPWUS, the terminal can demodulate the overlaid sequence to recover the complete information bits before receiving the complete OOK modulated signal, which can improve the demodulation speed of LPWUS.

[0132] For example, if the number of information bits in LPWUS is 6, the base station can select overlaid sequence carrying mode 3, in which the overlaid sequence carries part of the information bits of LPWUS.

[0133] Thus, when there are many information bits in LPWUS, on the one hand, it can avoid the problem that the terminal has to wait for the complete OOK modulated signal to recover the information bits because the overlaid sequence does not carry the LPWUS information bits, which can reduce the terminal's waiting time and improve the terminal's demodulation speed for LPWUS; on the other hand, it can avoid the problem that the overlaid sequence is more complex because it carries all the information bits of LPWUS, which can improve the terminal's demodulation speed and demodulation accuracy for LPWUS.

[0134] S304: The terminal selects the corresponding overlaid sequence carrying method based on the number of LPWUS information bits and the LPWUS information bit number threshold.

[0135] It should be noted that the implementation method of S304 can be found in the description of S303, and will not be repeated here.

[0136] In some embodiments, the main communication unit of the terminal may receive the number of LPWUS information bits and an LPWUS information bit count threshold. Based on the LPWUS information bit count and the threshold, the main communication unit selects the corresponding overlaid sequence bearer mode. Subsequently, the main communication unit can send the selected overlaid sequence bearer mode to the wake-up receiver unit. Finally, the main communication unit shuts down.

[0137] The main communication unit consumes a significant amount of power. When the main communication unit selects the corresponding overlaid sequence bearer mode, it can send this to the wake-up receiver unit, enabling the wake-up receiver unit to demodulate the received LPWUS. The main communication unit can then be shut down to reduce power consumption in the terminal.

[0138] S305: The base station modulates the information bits into an OOK modulated signal based on the selected overlaid sequence bearer method.

[0139] When a base station needs to wake up a terminal, it can first convert the LPWUS information bits into a digital signal, and then modulate the digital signal into an OOK modulated signal, which can be based on overlaid sequence modulation.

[0140] S306: The base station sends an OOK modulated signal to the terminal.

[0141] Based on the example of S303, the following sections introduce different overlaid sequences under different overlaid sequence carrying methods.

[0142] In some embodiments, taking the number of information bits in LPWUS as 2, the base station can select overlaid sequence bearer mode 1 as an example. For example, information bits bit1-bit2 are

[11] , the information bits are encoded into digital signals to obtain

[1010] , and then OOK modulation is used to obtain OOK modulated signals. The OOK modulated signals can be modulated based on pseudo-random sequences (which can be called the first sequence), random numbers, or fixed ZC sequences, such as Figure 4 The OOK modulated signal shown in (a) can be obtained by modulating the ON symbols in the first and third time lengths based on a pseudo-random sequence, random numbers, or a fixed ZC sequence. The OOK modulated signals generated using overlaid sequence carrier mode 1 in the following text can all be modulated based on a pseudo-random sequence, random numbers, or a fixed ZC sequence, which will not be elaborated further.

[0143] In some embodiments, taking the number of information bits in LPWUS as 4, the base station can select overlaid sequence carrying method 2 as an example. For instance, information bits 1-4 are

[1111] , and the information bits are encoded into a digital signal to obtain [10101010]. An OOK modulated signal can be obtained using OOK modulation. Assuming an overlaid sequence carries four bits of a digital signal, this OOK modulated signal can be modulated based on overlaid sequence 10 (which can be called the second sequence). Overlaid sequence 10 can carry four bits of a digital signal

[1010] . For example... Figure 4 The OOK modulated signal shown in (b) can be obtained by modulating the ON symbols of the first and third time lengths based on the overlaid sequence 10, and by modulating the ON symbols of the fifth and seventh time lengths based on a pseudo-random sequence. Alternatively, the ON symbols of the fifth and seventh time lengths can also be obtained by modulating either a random number or a repeating overlaid sequence 10. Figure 4 (Not shown).

[0144] In some embodiments, taking the number of information bits in LPWUS as 6, the base station can select overlaid sequence carrying method 3 as an example. For instance, if information bits 1-6 are [111111], the information bits are encoded into a digital signal to obtain [101010101010]. An OOK modulated signal can be obtained using OOK modulation. Assuming an overlaid sequence carries 4 bits of a digital signal, this OOK modulated signal can be modulated based on overlaid sequence 10 (which can be called the third sequence). Overlaid sequence 10 can carry 4 bits of a digital signal

[1010] . For example... Figure 4 The OOK modulated signal shown in (c) can be obtained by modulating the ON symbols of the first and third time lengths based on the overlaid sequence 10.

[0145] S307: The terminal demodulates the received OOK modulated signal based on the selected overlaid sequence bearer mode and restores the LPWUS information bits.

[0146] It should be understood that, based on the selected overlaid sequence bearer method, the terminal can determine the base station's modulation method for LPWUS, and thus determine the corresponding LPWUS demodulation method.

[0147] It is understandable that the terminal stores the correspondence between overlaid sequences and digital signals, and the terminal can demodulate the overlaid sequence based on the correspondence between the overlaid sequence and the digital signal. For example, the terminal stores the digital signal

[0001] corresponding to the overlaid sequence 1.

[0148] It should be noted that the following examples demodulate the OOK modulated signals in the three examples introduced in S308 one by one.

[0149] In some embodiments, taking the number of LPWUS information bits as 2 and the overlaid sequence carrying mode 1 as an example, the terminal can determine that the overlaid sequence does not carry LPWUS information bits. It can wait for the complete OOK modulation signal of LPWUS, and then the terminal demodulates the OOK modulation signal to obtain the digital signal

[1010] , and then restores the LPWUS information bits to

[11] .

[0150] In some embodiments, taking the number of LPWUS information bits as 4 and selecting overlaid sequence carrying mode 2 as an example, the terminal determines that the overlaid sequence carries all the information bits of LPWUS without waiting for the complete OOK modulation signal of LPWUS. Based on the correspondence between the overlaid sequence and the digital signal, the terminal can determine that the overlaid sequence 10 corresponds to the digital signal

[1010] . The terminal can receive the ON symbol modulated based on the overlaid sequence 10 in the first time length and the third time length, respectively. It can demodulate these two overlaid sequences 10 to obtain the digital signal [10101010], and then restore the LPWUS information bits to

[1111] .

[0151] In some embodiments, taking the number of LPWUS information bits as 6 and selecting overlaid sequence carrying mode 3 as an example, the terminal determines that the overlaid sequence carries part of the LPWUS information bits. It can wait until it receives the complete OOK modulated signal of LPWUS. Based on the correspondence between the overlaid sequence and the digital signal, the terminal can determine that the overlaid sequence 10 corresponds to the digital signal

[1010] . The terminal can demodulate the overlaid sequence 10 to obtain [10101010] based on the ON symbol modulated by the overlaid sequence 10 received in the first time length and the third time length, respectively. The terminal can demodulate

[1010] based on the complete OOK modulated signal, and then combine them to obtain the complete digital signal as [101010101010], and then restore the LPWUS information bits as [111111].

[0152] In some embodiments, the terminal's wake-up receiver unit may receive the OOK modulation signal and perform demodulation of the received OOK modulation signal based on the selected overlaid sequence bearer mode to restore the LPWUS information bits. Subsequently, the wake-up receiver unit determines that the LPWUS information bits indicate that it should wake up, which can trigger the main communication unit to start.

[0153] After the wake-up receiver unit demodulates and obtains the LPWUS information bits, it determines that the information bits indicate itself, and the wake-up receiver unit triggers the main communication unit to start.

[0154] As can be seen from the above, the base station can flexibly select the corresponding overlaid sequence carrying method based on the number of information bits of LPWUS, which is beneficial to improving the demodulation performance of the terminal, such as demodulation speed and demodulation accuracy of LPWUS.

[0155] Example 2:

[0156] Based on the OOK-1 and OOK-4 modulation methods introduced above.

[0157] OOK-1 modulation means that one OFDM symbol carries one modulation symbol. The ON and OFF symbols mentioned above are both modulation symbols. The length of one OFDM symbol under OOK-1 modulation can correspond to a time length described above.

[0158] OOK-4 modulation means that one OFDM symbol carries M modulation symbols. The length of one OFDM symbol under OOK-4 modulation can correspond to the M time lengths described above.

[0159] For example, taking a digital signal of

[1010] and an OFDM symbol duration of 66.67 microseconds, under OOK-1 modulation, the network side can transmit an ON symbol within the first OFDM symbol, that is, transmit an ON symbol within 66.67 microseconds. See [link to documentation]. Figure 5 As shown in (a) in the figure.

[0160] In OOK-4 modulation, assuming M=4, one OFDM symbol can carry four modulation symbols. The network side can transmit two ON symbols within the first OFDM symbol. 66.67 microseconds is four time lengths. See [link to relevant documentation]. Figure 5 As shown in (b).

[0161] Based on the predefined protocol specification introduced in Embodiment 1, in one possible implementation, the rule for determining the overlaid bearer mode added in the predefined protocol specification can also be related to the modulation mode of LPWUS, that is, the number of OFDM symbol carrier modulation symbols (which can be called LPWUS parameters).

[0162] In some embodiments, the number of M-value thresholds in the OOK-4 modulation scheme is 2, including M-value threshold 1 and M-value threshold 2. The determination rule 3 for the overlaid bearer scheme can be as follows: when the LPWUS is modulated using the OOK-1 modulation scheme, or when the LPWUS is modulated using the OOK-4 modulation scheme and the M-value does not exceed the M-value threshold 1 (also known as being less than or equal to the third threshold), the overlaid sequence bearer scheme 3 can be used; when the LPWUS is modulated using the OOK-4 modulation scheme and the M-value exceeds the M-value threshold 1 but does not exceed the M-value threshold 2 (also known as being greater than the third threshold and less than or equal to the fourth threshold), the overlaid sequence bearer scheme 2 can be used; when the LPWUS is modulated using the OOK-4 modulation scheme and the M-value exceeds the M-value threshold 2 (also known as being greater than the fourth threshold), the overlaid sequence bearer scheme 1 can be used.

[0163] It should be noted that rule 3 for determining the overlaid bearer method described above is merely an example. For instance, it could also be used when employing OOK-1 modulation or OOK-4 modulation, provided that the M value does not exceed the M value threshold 1, in which case overlaid sequence bearer method 2 is employed. The fact that the number of M value thresholds for the OOK-4 modulation method is 2 is also merely an example; the number of M value thresholds for the OOK-4 modulation method could also be 1. This application does not impose any limitations on this.

[0164] Next, combined Figure 6 Taking the network side as the base station and the terminal including the main communication unit and the wake-up receiver unit as an example, this paper introduces the method for determining the superimposed sequence bearer mode under different LPWUS modulation modes.

[0165] like Figure 6 As shown, the method for determining the superimposed sequence carrying method may include the following steps:

[0166] S601: The base station is configured with LPWUS modulation.

[0167] In some embodiments, the base station may be configured with LPWUS modulation scheme as OOK-1.

[0168] In some embodiments, the base station may configure the modulation scheme of LPWUS to OOK-4, configure the M value, and configure the M value threshold.

[0169] For example, when the base station is configured with the modulation scheme of LPWUS as OOK-4, the M value can be configured as 4, and the M value threshold 1 can be configured as 1 and the M value threshold 2 as 2.

[0170] It should be noted that the M-value threshold configured for OOK-4 in the base station is only an example. The M-value threshold for OOK-4 can also be predefined in the protocol specification, that is, M-value threshold 1 and M-value threshold 2 are predefined.

[0171] In some embodiments, this application may add a predefined M-value threshold to a predefined protocol specification. Taking the determination rule 3 of the overlaid bearer mode described above as an example, the determination rule 3 of the overlaid bearer mode may be as follows: when LPWUS is modulated using OOK-1 modulation mode, or when LPWUS is modulated using OOK-4 modulation mode, and the M-value does not exceed 1, the overlaid sequence bearer mode 3 may be used; when LPWUS is modulated using OOK-4 modulation mode, and the M-value exceeds 1 but does not exceed 2, the overlaid sequence bearer mode 2 may be used; when LPWUS is modulated using OOK-4 modulation mode, and the M-value exceeds 2, the overlaid sequence bearer mode 1 may be used.

[0172] S602: The base station sends the LPWUS modulation scheme to the terminal.

[0173] In one possible implementation, the base station can send the LPWUS modulation scheme to the terminal during the process of establishing a communication connection with the terminal.

[0174] In some embodiments, during the process of establishing a communication connection between the base station and the terminal, the base station can send a MACCE to the terminal through the MAC layer. The MACCE can carry indication information 2, which is used to indicate the modulation method of LPWUS.

[0175] In some embodiments, during the process of establishing a communication connection between the base station and the terminal, the base station can send DCI to the terminal through the physical layer, and the DCI can carry indication information 2.

[0176] In some embodiments, during the process of establishing a communication connection between the base station and the terminal, the base station may send a preamble to the terminal, and the preamble may carry indication information 2.

[0177] S603: The base station selects the corresponding overlaid sequence bearer mode based on the LPWUS modulation scheme.

[0178] Based on the above introduction, the predefined protocol specification adds rules for determining the overlaid bearer mode. The base station can select the corresponding overlaid sequence bearer mode from the predefined protocol specification based on the LPWUS modulation mode, or based on the LPWUS modulation mode, M value and M value threshold.

[0179] In some embodiments, the number of M-value thresholds is 2, including M-value threshold 1 and M-value threshold 2, which are 1 and 2 respectively. The base station can select the corresponding overlaid sequence bearer mode based on the determination rule 3 of the overlaid bearer mode described above.

[0180] For example, if the modulation scheme of LPWUS is OOK-1, or if the modulation scheme of LPWUS is OOK-4 and the M value is 1, then one OFDM symbol can carry one modulation symbol. The base station can select overlaid sequence carrying scheme 3, where the overlaid sequence carries part of the information bits of LPWUS.

[0181] Thus, one OFDM symbol can carry one modulation symbol, indicating that the transmission speed of LPWUS is relatively slow. By adopting the overlaid sequence carrying method 3, the terminal can demodulate and restore the LPWUS information bits without waiting for a long time, which can improve the demodulation speed of the terminal for LPWUS.

[0182] For example, if the modulation scheme of LPWUS is OOK-4 and the M value is 2, then two modulation symbols can be carried within one OFDM symbol. The base station can choose overlaid sequence carrying scheme 2, and the overlaid sequence carries all the information bits of LPWUS.

[0183] Thus, one OFDM symbol can carry two modulation symbols, indicating that the transmission speed of LPWUS is relatively moderate. By using overlaid sequence carrying method 2, the terminal can demodulate the LPWUS information bits by demodulating the overlaid sequence, which also allows the terminal to wait less time and improves the demodulation speed of LPWUS.

[0184] For example, if the modulation scheme of LPWUS is OOK-4 and the M value is 4, then four modulation symbols can be carried within one OFDM symbol. The base station can select overlaid sequence carrying scheme 1, where the overlaid sequence does not carry LPWUS information bits.

[0185] Thus, one OFDM symbol can carry four modulation symbols, indicating that LPWUS has a fast transmission speed. Using overlaid sequence carrying method 1, the terminal does not need to wait long to receive the complete OOK modulation signal, and can then demodulate to obtain the LPWUS information bits, which can also improve the terminal's demodulation speed for LPWUS.

[0186] S604: The terminal selects the corresponding overlaid sequence bearer mode based on the LPWUS modulation scheme.

[0187] It should be noted that the implementation method of S604 can be found in the description of S603, and will not be repeated here.

[0188] S605: The base station modulates the information bits into an OOK modulated signal based on the selected overlaid sequence bearer method.

[0189] It should be noted that the implementation method of S605 can be found in the description of S305, and will not be repeated here.

[0190] S606: The base station sends an OOK modulated signal to the terminal.

[0191] Based on the example of S603, the following sections introduce different overlaid sequences under different overlaid sequence carrying methods. The following sections take LPWUS with 2 information bits as an example, which includes bit1-bit2 with a value of

[11] , and the digital signal obtained by encoding the information bits is

[1010] .

[0192] In some embodiments, the modulation scheme of LPWUS is OOK-1 modulation scheme, or the modulation scheme of LPWUS is OOK-4 modulation scheme, with M value of 1, and the base station can select overlaid sequence bearer mode 3.

[0193] For example, an overlaid sequence carrying two bits of a digital signal can be modulated using OOK modulation to obtain an OOK modulated signal. This OOK modulated signal can be modulated based on overlaid sequence 2 (which can be called the fourth sequence). Overlaid sequence 2 corresponds to

[10] , which can be found in

[10] . Figure 7 The OOK modulated signal shown in (a) can be obtained by modulating the ON symbol of the first time length based on the overlaid sequence 2.

[0194] In some embodiments, the modulation scheme of LPWUS is OOK-4 modulation scheme, the M value is 2, and the base station can select overlaid sequence bearer scheme 2.

[0195] For example, an overlaid sequence carrying two bits of a digital signal can be modulated using OOK modulation to obtain an OOK modulated signal. This OOK modulated signal can be modulated based on overlaid sequence 2 (which can be called the fifth sequence). Overlaid sequence 2 corresponds to

[10] , which can be found in

[10] . Figure 7 The OOK modulated signal shown in (b) can be obtained by modulating the ON symbols of the first and third time lengths based on the overlaid sequence 2.

[0196] In some embodiments, the modulation scheme of LPWUS is OOK-4 modulation scheme, with an M value of 4, and the base station can select overlaid sequence bearer scheme 1.

[0197] An OOK modulated signal can be obtained using OOK modulation, which can be based on a pseudo-random sequence (which can be called the sixth sequence) or random numbers. See also... Figure 7 The OOK modulated signal shown in (c) can be obtained based on pseudo-random sequences or random number modulation for the ON symbols in the first and third time lengths.

[0198] S607: The terminal demodulates the received OOK modulated signal based on the selected overlaid sequence bearer mode and restores the LPWUS information bits.

[0199] It should be noted that the implementation method of S607 can be found in the description of S307, and will not be repeated here.

[0200] As can be seen from the above, the base station can take into account the transmission time of LPWUS and flexibly select the corresponding overlaid sequence bearer based on the modulation method of LPWUS, which is beneficial to maintaining the demodulation speed of LPWUS for the terminal.

[0201] Example 3:

[0202] In one possible implementation, the rules for determining the overlaid bearer mode added in the predefined protocol specification can be related to both the number of information bits in LPWUS and the modulation mode of LPWUS, that is, to both the number of information bits in LPWUS and the number of modulation symbols carried by OFDM symbols (the two can be referred to as LPWUS parameters).

[0203] In some embodiments, the number of information bit thresholds in LPWUS is 2, including threshold 1 and threshold 2, and the number of M-value thresholds in OOK-4 modulation is 2, including threshold 1 and threshold 2.

[0204] Rule 4 for determining the overlaid bearer mode can be as follows: If the number of information bits of LPWUS does not exceed the number threshold 1, LPWUS can be modulated using OOK-1 modulation or OOK-4 modulation, and the M value does not exceed the M value threshold 1, then overlaid sequence bearer mode 1 can be used; If the number of information bits of LPWUS does not exceed the number threshold 1, LPWUS can be modulated using OOK-4 modulation, and the M value exceeds the M value threshold 1 but does not exceed the M value threshold 2, then overlaid sequence bearer mode 1 can also be used; If the number of information bits of LPWUS does not exceed the number threshold 1, LPWUS can be modulated using OOK-4 modulation, and the M value exceeds the M value threshold 2, then overlaid sequence bearer mode 2 can be used.

[0205] Rule 4 for determining the overlaid bearer mode can also be as follows: If the number of information bits of LPWUS exceeds threshold 1 but does not exceed threshold 2, LPWUS is modulated using OOK-1 modulation or OOK-4 modulation, and the M value does not exceed threshold 1, then overlaid sequence bearer mode 2 can be used; if the number of information bits of LPWUS exceeds threshold 1 but does not exceed threshold 2, LPWUS is modulated using OOK-4 modulation, and the M value exceeds threshold 1 but does not exceed threshold 2, then overlaid sequence bearer mode 1 can be used; if the number of information bits of LPWUS exceeds threshold 1 but does not exceed threshold 2, LPWUS is modulated using OOK-4 modulation, and the M value exceeds threshold 2, then overlaid sequence bearer mode 1 can be used.

[0206] Rule 4 for determining the overlaid bearer mode can also be that, when the number of information bits in LPWUS exceeds the number threshold 2, the overlaid sequence bearer mode 3 can be used regardless of the modulation method.

[0207] It should be noted that rule 4 for determining the various overlaid bearer methods mentioned above is only an example, and the number of information bits thresholds for LPWUS is 2, and the number of M-value thresholds for OOK-4 modulation is also 2, which are not limited in this application.

[0208] Next, combined Figure 8 Taking the network side as the base station and the terminal including the main communication unit and the wake-up receiver unit as an example, this paper introduces the method for determining the superimposed sequence carrying method under different conditions of the number of information bits of LPWUS and different modulation methods of LPWUS.

[0209] like Figure 8 As shown, the method for determining the superimposed sequence carrying method may include the following steps:

[0210] S801: The base station is configured with the number of LPWUS information bits, the threshold for the number of LPWUS information bits, and the modulation scheme of LPWUS.

[0211] S802: The base station sends to the terminal the number of LPWUS information bits, the threshold for the number of LPWUS information bits, and the modulation scheme of LPWUS.

[0212] S803: The base station selects the corresponding overlaid sequence bearer method based on the number of LPWUS information bits, the LPWUS information bit threshold, and the LPWUS modulation method.

[0213] In some embodiments, the number of LPWUS information bit thresholds is 2, including threshold 1 and threshold 2, which are 2 and 4 respectively. The number of M-value thresholds is 2, including threshold 1 and threshold 2, which are 1 and 2 respectively. The base station can select the corresponding overlaid sequence bearer mode based on rule 4 for determining the overlaid bearer mode described above.

[0214] For example, if the number of information bits in LPWUS is 2, the modulation scheme of LPWUS is OOK-1, or the modulation scheme of LPWUS is OOK-4, and the M value is 1, the base station can select overlaid sequence carrying scheme 1. The overlaid sequence does not carry LPWUS information bits, indicating that the generated OOK modulated signal can be modulated based on a pseudo-random sequence (which can be called the seventh sequence) or random numbers.

[0215] Thus, even with a small number of LPWUS information bits, the terminal can receive the complete OOK modulated signal quickly, even if the LPWUS transmission speed is slow. The terminal can demodulate the LPWUS information bits without waiting for a long time, thus avoiding affecting the terminal's LPWUS demodulation speed.

[0216] For example, if the number of information bits in LPWUS is 2, the modulation scheme of LPWUS is OOK-4, and the M value is 2, or if the modulation scheme of LPWUS is OOK-4 and the M value is 4, the base station can select overlaid sequence carrying scheme 2, and the overlaid sequence carries all the information bits of LPWUS.

[0217] Thus, when the number of information bits in LPWUS is small, the transmission speed of LPWUS is moderate or fast, indicating that the terminal can receive the complete OOK modulated signal quickly. However, if the transmission speed is too fast, the terminal may make demodulation errors of the OOK modulated signal, affecting the demodulation accuracy of LPWUS. Therefore, the overlaid sequence bearer method 2 is adopted, which enables the terminal to demodulate the overlaid sequence and ensures the accuracy of the information bits of the demodulated LPWUS.

[0218] For example, if the number of information bits in LPWUS is 4, the modulation scheme of LPWUS is OOK-1, or the modulation scheme of LPWUS is OOK-4 and the M value is 1, the base station can select overlaid sequence carrying scheme 2, in which the overlaid sequence carries all the information bits of LPWUS.

[0219] Thus, when the information bits of LPWUS are moderate and the transmission speed of LPWUS is slow, it means that the terminal may take a long time to receive the complete OOK modulated signal. Therefore, the terminal can obtain the information bits of LPWUS by demodulating only the overlaid sequence, which can avoid affecting the terminal's demodulation speed of LPWUS.

[0220] For example, if the number of information bits in LPWUS is 4, the modulation method of LPWUS is OOK-4, and the value of M is 2 or 4, the base station can select overlaid sequence carrying method 1. The overlaid sequence does not carry LPWUS information bits, indicating that the generated OOK modulated signal can be modulated based on a pseudo-random sequence (which can be called the eighth sequence) or random numbers.

[0221] Thus, when the LPWUS information bits are moderate and the LPWUS transmission speed is moderate or fast, it means that the terminal may receive the complete OOK modulated signal quickly. Therefore, the terminal can wait for the complete OOK modulated signal to be demodulated to obtain the LPWUS information bits, which can avoid affecting the terminal's LPWUS demodulation speed and reduce the occupation of computing resources.

[0222] For example, if the number of information bits in LPWUS is 6 and the modulation scheme of LPWUS is any modulation scheme, the base station can select overlaid sequence to carry scheme 3, which carries part of the information bits of LPWUS.

[0223] With 6 information bits in LPWUS, the modulation scheme of LPWUS is OOK-4, and the M value is 4, the base station can select overlaid sequence carrying scheme 3. The overlaid sequence carries part of the information bits of LPWUS, indicating that the generated OOK modulated signal can be modulated based on the ninth sequence. See the example of the third sequence in S308.

[0224] Thus, with more information bits in LPWUS, the terminal can avoid waiting too long for the complete OOK modulated signal, thereby improving the demodulation speed of LPWUS. At the same time, it can avoid the terminal demodulating more complex overlaid sequences, thus ensuring the demodulation accuracy of LPWUS.

[0225] S804: The terminal selects the corresponding overlaid sequence bearer based on the number of LPWUS information bits, the LPWUS information bit threshold, and the LPWUS modulation scheme.

[0226] S805: The base station modulates the information bits into an OOK modulated signal based on the selected overlaid sequence bearer method.

[0227] S806: The base station sends an OOK modulated signal to the terminal.

[0228] S807: The terminal demodulates the received OOK modulated signal based on the selected overlaid sequence bearer mode and restores the LPWUS information bits.

[0229] It should be noted that the implementation methods of S801-S807 can be found in the description of S301-S307 in Embodiment 1 and the description of S601-S607 in Embodiment 2, and will not be repeated here.

[0230] As can be seen from the above, by comprehensively considering the number of information bits of LPWUS and the length of LPWUS transmission time caused by different modulation methods, the base station can flexibly select the corresponding overlaid sequence carrying method, which can further improve the demodulation performance of the terminal, such as demodulation speed and demodulation accuracy of LPWUS.

[0231] Example 4:

[0232] Based on the above introduction, a digital signal is 1, and an OOK modulated signal corresponds to one ON symbol. The number of 1s in the digital signal is the number of ON symbols.

[0233] In some embodiments, the number of 1s in the digital signal is related to the encoding method used by the network side to encode the information bits of LPWUS. Taking Manchester encoding as an example, the number of 1s in the digital signal is related to the number of information bits of LPWUS, and the two are the same.

[0234] The following example illustrates how the number of information bits in LPWUS is related to the number of ON symbols.

[0235] In one possible implementation, the rule for determining the overlaid bearer mode can be related to the number of ON symbols, that is, the number of high levels in the OOK modulated signal (which can be called the parameter of LPWUS).

[0236] In some embodiments, the number of thresholds for the number of ON symbols in the OOK modulated signal can be two, including threshold 3 and threshold 4. The rule 5 for determining the overlaid carrying method can be: if the number of ON symbols in the OOK modulated signal does not exceed threshold 3 (also known as less than or equal to the fifth threshold), overlaid sequence carrying method 1 can be used; if the number of ON symbols in the OOK modulated signal exceeds threshold 3 but does not exceed threshold 4 (also known as greater than the fifth threshold and less than or equal to the sixth threshold), overlaid sequence carrying method 2 can be used; if the number of ON symbols in the OOK modulated signal exceeds threshold 4 (also known as greater than the sixth threshold), overlaid sequence carrying method 3 can be used.

[0237] It should be noted that rule 5 for determining the overlaid carrying method is only an example, and the threshold of 2 for the number of ON symbols is also only an example, and this application does not limit it.

[0238] Next, combined Figure 9 Taking the network side as the base station and the terminal including the main communication unit and the wake-up receiver unit as an example, this paper introduces the method for determining the superimposed sequence carrying mode when the number of ON symbols in the OOK modulation signal is different.

[0239] like Figure 9 As shown, the method for determining the superimposed sequence carrying method may include the following steps:

[0240] S901: The number of information bits of LPWUS configured in the base station and the threshold for the number of ON symbols in the OOK modulation signal.

[0241] In some embodiments, the base station configures a threshold for the number of ON symbols, which can be configured with the number of ON symbols and the value of the threshold.

[0242] For example, the base station can configure the number of ON symbols to a threshold of 2, including a threshold of 3 and a threshold of 4. The base station can configure the value of the number of ON symbols threshold, for example, the value of the number of threshold 3 is 2 and the value of the number of threshold 4 is 4.

[0243] In some embodiments, the base station may also configure only the value of the threshold for the number of ON symbols, which is not limited in this application.

[0244] It should be noted that the threshold for the number of ON symbols in the OOK modulation signal configured by the base station is only an example. The threshold for the number of ON symbols in the OOK modulation signal can also be predefined in the protocol specification, that is, the threshold 3 and the threshold 4 are predefined.

[0245] In some embodiments, this application may add a predefined threshold for the number of ON symbols in a predefined protocol specification. Taking the determination rule 5 of the overlaid bearer mode described above as an example, the determination rule 5 of the overlaid bearer mode may be: if the number of ON symbols in the OOK modulated signal does not exceed 2, the overlaid sequence bearer mode 1 may be used; if the number of ON symbols in the OOK modulated signal exceeds 2 but does not exceed 4, the overlaid sequence bearer mode 2 may be used; if the number of ON symbols in the OOK modulated signal exceeds 4, the overlaid sequence bearer mode 3 may be used.

[0246] It should be noted that other implementations of S901 can be found in the introduction of S301, and will not be repeated here.

[0247] S902: The threshold for the number of LPWUS information bits sent by the base station to the terminal and the number of ON symbols in the OOK modulation signal.

[0248] S903: The base station selects the corresponding overlaid sequence carrying method based on the number of information bits in LPWUS and the threshold of the number of ON symbols in the OOK modulation signal.

[0249] It should be understood that the number of information bits in LPWUS is related to the number of ON symbols in the OOK modulated signal. Therefore, the base station can determine the number of ON symbols in the OOK modulated signal based on the number of information bits in LPWUS. Subsequently, the base station can select the corresponding overlaid sequence carrying method based on the number of ON symbols in the OOK modulated signal and the threshold for the number of ON symbols in the OOK modulated signal.

[0250] Taking Manchester encoding as an example, the number of information bits in LPWUS is the same as the number of ON symbols in the OOK modulated signal. For example, if the number of information bits in LPWUS is 4, it can be encoded using Manchester encoding to obtain [10101010]. Then, the number of ON symbols in the OOK modulated signal is also 4. Subsequently, based on rule 5 for determining the overlaid bearer method introduced above, the corresponding overlaid sequence bearer method can be selected.

[0251] S904: The terminal selects the corresponding overlaid sequence carrying method based on the number of information bits in LPWUS and the threshold number of ON symbols in the OOK modulated signal.

[0252] It should be noted that the implementation method of S904 can be found in the introduction of S903, and will not be repeated here.

[0253] S905: The base station modulates the information bits into an OOK modulated signal based on the selected overlaid sequence bearer method.

[0254] S906: The base station sends an OOK modulated signal to the terminal.

[0255] S907: The terminal demodulates the received OOK modulated signal based on the selected overlaid sequence bearer mode and restores the LPWUS information bits.

[0256] It should be noted that the implementation methods of S902, S905-S907 can be found in the description of S302, S305-S307 in Embodiment 1, and will not be repeated here.

[0257] Furthermore, in some encoding methods, the number of ON symbols in the OOK modulated signal may be independent of the number of information bits in LPWUS.

[0258] In some embodiments, Embodiment 5 may add the following steps to Embodiment 4, without needing to execute S903, S904 and S905.

[0259] Step 1: The base station converts the LPWUS information bits into an OOK modulated signal, and selects the corresponding overlaid sequence bearer based on the number of ON symbols in the OOK modulated signal (the number of ON symbols in the OOK modulated signal can be called the parameter of LPWUS) and the threshold of the number of ON symbols in the OOK modulated signal.

[0260] Step 2: The base station sends the number of ON symbols in the OOK modulation signal to the terminal.

[0261] In some embodiments, before the base station sends the OOK modulation signal to the terminal, the base station may send a preamble (which may be called first information) to the terminal. The preamble may carry indication information 3, which is used to indicate the number of ON symbols in the OOK modulation signal.

[0262] Step 3: The terminal selects the corresponding overlaid sequence carrying method based on the number of ON symbols in the OOK modulated signal and the threshold for the number of ON symbols in the OOK modulated signal.

[0263] Step 4: Based on the selected overlaid sequence bearer method, the base station modulates the information bits into an OOK modulated signal.

[0264] The OOK modulated signal is based on overlaid sequence modulation.

[0265] The method for determining the superimposed sequence carrying method can be executed in the order of S901-S902, steps 1-3, steps 4, and S906-S907.

[0266] As can be seen from the above, the base station can flexibly select the corresponding overlaid sequence carrying method based on the number of ON symbols in the OOK modulated signal, which is beneficial to improving the demodulation performance of the terminal for LPWUS, such as demodulation speed and demodulation accuracy.

[0267] This application also provides a computer-readable storage medium storing a computer program, which, when executed, can implement one or more steps in the method for determining any of the above-described superimposed sequence carrying methods.

[0268] 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.

[0269] This application also provides a computer program product including a computer program. When the computer program product is executed, it can implement one or more steps in any of the above-described methods for determining the superimposed sequence carrying method.

[0270] The computer-readable storage medium and computer program product provided in this application embodiment are both used to execute the method for determining the corresponding superimposed sequence bearing mode provided above. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the method for determining the corresponding superimposed sequence bearing mode provided above, and will not be repeated here.

[0271] The terms "first," "second," and "third," etc., used in the specification of embodiments, claims, and drawings of this application are used to distinguish different objects, rather than to limit a specific order.

[0272] 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.

[0273] 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 determining the superimposed sequence carrying method, characterized in that, Applied to network devices, including: First information for configuring the Low Power Wake-up Signal (LPWUS); the first information is used to indicate the parameters of the LPWUS; Send the first information to the terminal; Based on the first information, the method of carrying the superimposed sequence is determined; A first signal is sent to the terminal; the first signal is generated based on the superimposed sequence carrying method.

2. The method according to claim 1, characterized in that, The first information of the LPWUS includes the number of information bits of the LPWUS.

3. The method according to claim 2, characterized in that, The number of information bits of the LPWUS is less than or equal to a first threshold, and the first signal is generated based on a first sequence or a random number, wherein the first sequence does not carry the information bits of the LPWUS.

4. The method according to claim 2, characterized in that, The number of information bits in the LPWUS is greater than a first threshold and less than or equal to a second threshold. The first signal is generated based on a second sequence, which carries all the information bits of the LPWUS.

5. The method according to claim 2, characterized in that, The number of information bits in the LPWUS is greater than the second threshold, and the first signal is generated based on a third sequence, which carries a portion of the information bits of the LPWUS.

6. The method according to claim 1, characterized in that, The first information of the LPWUS includes the number of modulation symbols carried by the Orthogonal Frequency Division Multiplexing (OFDM) symbols; the first signal includes the modulation symbols.

7. The method according to claim 6, characterized in that, The number of modulation symbols carried by the OFDM symbol is less than or equal to a third threshold, and the first signal is generated based on a fourth sequence, which carries part of the information bits of the LPWUS.

8. The method according to claim 6, characterized in that, The number of modulation symbols carried by the OFDM symbol is greater than the third threshold and less than or equal to the fourth threshold. The first signal is generated based on the fifth sequence, which carries all the information bits of the LPWUS.

9. The method according to claim 6, characterized in that, The number of modulation symbols carried by the OFDM symbol is greater than the fourth threshold, and the first signal is generated based on the sixth sequence or random numbers, wherein the sixth sequence does not carry the information bits of the LPWUS.

10. The method according to claim 1, characterized in that, The first information of the LPWUS includes the number of information bits of the LPWUS and the number of OFDM symbol-carrying modulation symbols.

11. The method according to claim 10, characterized in that, The number of information bits of the LPWUS is less than or equal to a first threshold, the number of modulation symbols carried by the OFDM symbol is less than or equal to a third threshold, the first signal is generated based on a seventh sequence or random numbers, and the seventh sequence does not carry the information bits of the LPWUS.

12. The method according to claim 10, characterized in that, The number of information bits of the LPWUS is greater than the first threshold and less than or equal to the second threshold. The number of modulation symbols carried by the OFDM symbol is greater than the third threshold and less than or equal to the fourth threshold. The first signal is generated based on an eighth sequence or a random number. The eighth sequence does not carry the information bits of the LPWUS.

13. The method according to claim 10, characterized in that, The number of information bits in the LPWUS is greater than the second threshold, the number of modulation symbols carried by the OFDM symbol is greater than the fourth threshold, the first signal is generated based on the ninth sequence, and the ninth sequence carries part of the information bits of the LPWUS.

14. The method according to claim 2, characterized in that, The method further includes: The number of high-level signals in the first signal is determined based on the number of information bits in the LPWUS.

15. The method according to claim 1, characterized in that, The first information of the LPWUS includes the number of high-level signals in the first signal.

16. The method according to claim 14 or 15, characterized in that, The number of high-level signals in the first signal is less than or equal to the fifth threshold. The first signal is generated based on the tenth sequence or a random number, and the tenth sequence does not carry the information bits of the LPWUS.

17. The method according to claim 14 or 15, characterized in that, The number of high-level signals in the first signal is greater than the fifth threshold and less than or equal to the sixth threshold. The first signal is generated based on the eleventh sequence, which carries all the information bits of the LPWUS.

18. The method according to claim 14 or 15, characterized in that, The number of high-level signals in the first signal is greater than the sixth threshold. The first signal is generated based on the twelfth sequence, which carries part of the information bits of the LPWUS.

19. The method according to claim 4 or 12, characterized in that, The first threshold and the second threshold are configured by the network device, or the first threshold and the second threshold are predefined.

20. The method according to claim 8 or 12, characterized in that, The third threshold and the fourth threshold are configured by the network device, or the third threshold and the fourth threshold are predefined.

21. The method according to claim 17, characterized in that, The fifth and sixth thresholds are configured by the network device, or the fifth and sixth thresholds are predefined.

22. A method for determining the carrying mode of a superimposed sequence, characterized in that, Applied to terminals, including: Receive first information of LPWUS sent by the network device; the first information is used to indicate the parameters of the LPWUS; Based on the first information, the method of carrying the superimposed sequence is determined; The network device sends a first signal; the first signal is generated based on the superimposed sequence carrying method.

23. The method according to claim 22, characterized in that, The first information of the LPWUS includes the number of information bits of the LPWUS. Determining the superposition sequence bearer method based on the first information includes: Based on the number of information bits of the LPWUS, the first threshold, and the second threshold, the superimposed sequence carrying method is determined.

24. The method according to claim 22, characterized in that, The first information of the LPWUS includes the number of OFDM symbol-carrying modulation symbols. The step of determining the superposition sequence carrying method based on the first information includes: The superposition sequence carrying method is determined based on the number of modulation symbols carried by the OFDM symbol, the third threshold, and the fourth threshold.

25. The method according to claim 22, characterized in that, The first information of the LPWUS includes the number of information bits of the LPWUS and the number of OFDM symbol-bearing modulation symbols. Determining the superposition sequence bearer method based on the first information includes: Based on the number of information bits of the LPWUS, the number of modulation symbols carried by the OFDM symbols, the first threshold, the second threshold, the third threshold, and the fourth threshold, the superposition sequence carrying method is determined.

26. The method according to claim 22, characterized in that, The first information of the LPWUS includes the number of high-level signals in the first signal. Determining the superimposed sequence carrying method based on the first information includes: Based on the number of high-level signals in the first signal, the fifth threshold, and the sixth threshold, the superimposed sequence carrying method is determined.

27. The method according to claim 23 or 25, characterized in that, The first threshold and the second threshold are configured by the network device and sent to the terminal, or the first threshold and the second threshold are predefined.

28. The method according to claim 24 or 25, characterized in that, The third and fourth thresholds are configured by the network device and sent to the terminal, or the third and fourth thresholds are predefined.

29. The method according to claim 26, characterized in that, The fifth and sixth thresholds are configured by the network device and sent to the terminal, or the fifth and sixth thresholds are predefined.

30. A system for determining the superimposed sequence carrying method, characterized in that, The system includes network devices and terminals; The network device is used to configure first information for LPWUS; the first information is used to indicate the parameters of LPWUS. The network device is used to send the first information to the terminal; The terminal is used to receive the first information sent by the network device; The network device is used to determine the superimposed sequence bearer method based on the first information; The terminal is used to determine the superimposed sequence carrying method based on the first information; The network device is used to send a first signal to the terminal; the first signal is generated based on the superimposed sequence bearer method; The terminal is used to receive the first signal sent by the network device.

31. A communication device, characterized in that, The communication device includes a processing unit and a transceiver unit, and is used to perform the method for determining the superimposed sequence bearer mode as described in any one of claims 1 to 21, or the method for determining the superimposed sequence bearer mode as described in any one of claims 22 to 29.

32. A communication device, characterized in that, The device includes a processor coupled to a memory, the memory storing a program or instructions for performing a method for determining the superimposed sequence carrying method as described in any one of claims 1 to 21, or a method for determining the superimposed sequence carrying method as described in any one of claims 22 to 29.

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