Communication method and apparatus

Abstract

The present application relates to the technical field of communications, and provides a communication method and apparatus. In the present application, the number of bits in signal bit information of a low power signal is an integer multiple of the number of bits in bit information mapped onto one OFDM symbol. Thus, the transmission of redundant resources can be reduced, thereby ensuring energy balance within OFDM symbols without increasing the complexity for terminals to detect low-power signals.

Description

Communication method and apparatus

[0001] Cross-reference to Related Applications

[0002] This application claims priority to the Chinese Patent Application No. 202411255056.1, filed on September 6, 2024, and entitled "A communication method and apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] Embodiments of the present application relate to the field of communication technology, and in particular to a communication method and apparatus. BACKGROUND

[0004] In order to reduce the power consumption of the UE, the UE can use a low power wake up receiver (LP-WUR) to receive a signal. The LP-WUR can be implemented by a circuit or a chip with relatively simple structure. The LP-WUR is used to receive a low power wake up signal (LP-WUS) from a network device, and when the LP-WUR detects the LP-WUS, a main receiver (MR) (or a main radio (MR) or a main module) in the UE that is turned off (or in a sleep state) is woken up.

[0005] Specifically, how to generate the LP-WUS signal can ensure the detection reliability and low complexity of the LP-WUR, and the related art does not specify. SUMMARY

[0006] The present application provides a communication method and apparatus to ensure that the generated LP-WUS signal has high reliability and low complexity when detected by the LP-WUR.

[0007] In a first aspect, the present application provides a communication method, which can be executed by a first communication apparatus. The first communication apparatus can be a network device, a chip or a circuit. The method can be applied in a 5th generation (5G) communication system or a communication system above 5G. The method can also be applied in a non-terrestrial communication system, etc. Optionally, the chip can be a chip in a network device. The present application does not limit this. Optionally, the circuit can be a circuit in a network device. The present application does not limit this. The method is executed as follows:

[0008] The low-power consumption signal is transmitted, and signal bit information of the low-power consumption signal is associated with a terminal or a terminal subgroup, and a bit quantity of the signal bit information is an integer multiple of a bit quantity of bit information mapped by an orthogonal frequency division multiplexing (OFDM) symbol.

[0009] In a second aspect, a communication method is provided. The method can be performed by a second communication device, which can be a terminal, a chip or a circuit. The method can be applied to a 5G communication system or a communication system above 5G. The method can also be applied to a non-terrestrial communication system, etc. Optionally, the chip can be a chip in a terminal. The present application does not limit this. Optionally, the circuit can be a circuit in a terminal. The present application does not limit this. The method is performed as follows:

[0010] The low-power consumption signal is received, and signal bit information of the low-power consumption signal is associated with a terminal or a terminal subgroup, and a bit quantity of the signal bit information is an integer multiple of a bit quantity of bit information mapped by an OFDM symbol.

[0011] In the present application, the bit quantity of the signal bit information of the low-power consumption signal is an integer multiple of the bit quantity of the bit information mapped by the OFDM symbol, which can reduce the transmission of redundant resources, ensure the balance of the energy within the OFDM symbol, and does not increase the complexity of the terminal detecting the low-power consumption signal.

[0012] In combination with the first aspect or the second aspect, in an optional manner, the signal bit information associated with the terminal or the terminal subgroup includes one or more of the following: the signal bit information is used to determine one or more terminal identifiers; the signal bit information is used to determine one or more terminal subgroup identifiers; the signal bit information is used to indicate whether to wake up one or more terminals for information transmission; and the signal bit information is used to indicate whether to wake up terminals within one or more terminal subgroups for information transmission.

[0013] Based on this, after the terminal demodulates the signal bit information of the low-power consumption signal, it can be determined to perform which operation, and different operations will bring different false alarm rates, false detection rates and resource occupation rates, achieving more flexibility.

[0014] In an optional manner, in combination with the first aspect or the second aspect, the information transmission comprises one or more of the following: monitoring a physical downlink control channel (PDCCH), transmitting physical uplink control information (UCI), transmitting a physical uplink control channel (PUCCH), transmitting a physical uplink shared channel (PUSCH), receiving a physical downlink shared channel (PDSCH), receiving a synchronization signal block (SSB), receiving a channel state information reference signal (CSI-RS), or receiving a tracking reference signal (TRS).

[0015] After the terminal opens the main receiver with high power consumption, the different information transmission behaviors described above can be performed to reduce the invalid opening of the high-power consumption receiver.

[0016] In an optional manner, in combination with the first aspect or the second aspect, the determination manner of the low-power consumption signal comprises one of the following:

[0017] Manner one, the low-power consumption signal is based on on off keying (OOK) modulation;

[0018] Manner two, the low-power consumption signal is based on OOK modulation and Manchester coding;

[0019] Manner three, first bit information of the low-power consumption signal is based on OOK modulation, and a modulation manner of second bit information of the low-power consumption signal is only based on the first modulation;

[0020] Manner four, a modulation manner of the low-power consumption signal is only based on the first modulation;

[0021] Manner five, first bit information of the low-power consumption signal is based on OOK modulation, second bit information of the low-power consumption signal is based on OOK modulation, and the second bit information of the low-power consumption signal is based on the first modulation;

[0022] Manner six, the low-power consumption signal is based on OOK modulation, and the low-power consumption signal is based on the first modulation;

[0023] The first modulation does not include OOK modulation; and the signal bit information of the low-power consumption signal includes first bit information and second bit information.

[0024] In combination with the first aspect or the second aspect, in an optional manner, the low-power consumption signal in at least one of the third manner, the fourth manner, the fifth manner, and the sixth manner is further based on Manchester coding.

[0025] The low-power consumption signals determined by different manners have different modulation manners or coding manners, can be adapted to different terminal receiver types, and have different power consumptions of receivers receiving the low-power consumption signals generated based on different manners. Therefore, different manners can meet power consumption requirements of different terminals. For network equipment, the low-power consumption signals generated based on different manners have different resource occupancy rates or spectral efficiency, and can meet requirements of different network resource occupancy scenarios.

[0026] In combination with the first aspect or the second aspect, in an optional manner, the first modulation is used to represent different bit states of the signal bit information of the low-power consumption signal by different sequences, or the first modulation is used to represent different bit states of the signal bit information of the low-power consumption signal by different phases, or the first modulation is used to represent different bit states of the signal bit information of the low-power consumption signal by different cyclic shifts of a same sequence.

[0027] In this manner, more information can be carried by sequences or phases. When the same bit information is transmitted, the low-power consumption signal occupies less resources, reduces network resource overhead, and has good autocorrelation and cross-correlation between different phases or sequences, which can improve detection performance of a terminal and improve coverage performance of the low-power consumption signal.

[0028] In combination with the first aspect or the second aspect, in an optional manner, the signal bit information of the low-power consumption signal based on the first modulation is mapped to a first symbol, and a signal amplitude of the first symbol is not 0.

[0029] In this manner, in addition to OOK modulation, the low-power consumption signal carries information by phases or sequences at the same time of transmitting a symbol, can transmit the same bit information in a shorter time, and reduces network resource overhead.

[0030] In an optional manner, in combination with the first aspect or the second aspect, when the determination manner is the fourth manner, the value of N is 8 or 16, the value of M is 1 or 2 or 4 or 8, and the value of X is not 3; or when the determination manner is the third manner, the value of N is 8 or 16, the value of M is 1 or 2 or 4 or 8, and the value of X is not 2; when the determination manner is the fourth manner, the value of N is 8 or 16, the value of M is 1 or 2 or 4, and the value of X is not 3; or when the determination manner is the third manner, the value of N is 8 or 16, the value of M is 1 or 2 or 4, and the value of X is not 2; or when the determination manner is the first manner or the second manner or the fifth manner or the sixth manner, the value of N is an odd number, and the value of M is not 4; or when the determination manner is the first manner or the second manner or the fifth manner or the sixth manner, the value of M is 8, the value of N is not an odd number, and the value of N is not 2 or 6 or 10 or 14; or when the determination manner is the first manner or the second manner or the fifth manner or the sixth manner, the value of M is 4, the value of N is not an odd number, and the value of N is 2 or 4 or 6 or 8 or 10 or 12 or 14 or 16.

[0031] In this way, the number of bits of the signal bit information can be an integer multiple of the number of bits of the bit information mapped by one OFDM symbol, and the detection reliability and low complexity of the LP-WUR can be ensured without sending redundant bits.

[0032] In an optional manner, in combination with the first aspect or the second aspect, when the determination manner is the fourth manner, the value of N is 8 or 16, the value of M is 1 or 2 or 4 or 8, and the value of X is not 3; or when the determination manner is the third manner, the value of N is 8 or 16, the value of M is 1 or 2 or 4 or 8, and the value of X is not 2; when the determination manner is the fourth manner, the value of N is 8 or 16, the value of M is 1 or 2 or 4, and the value of X is not 3; or when the determination manner is the third manner, the value of N is 8 or 16, the value of M is 1 or 2 or 4, and the value of X is not 2; or when the determination manner is the first manner or the second manner or the fifth manner or the sixth manner, the value of N is an odd number, and the value of M is not 4; or when the determination manner is the first manner or the second manner or the fifth manner or the sixth manner, the value of M is 8, the value of N is not an odd number, and the value of N is not 2 or 6 or 10 or 14; or when the determination manner is the first manner or the second manner or the fifth manner or the sixth manner, the value of M is 4, the value of N is not an odd number, and the value of N is 2 or 4 or 6 or 8 or 10 or 12 or 14 or 16.

[0033] Based on this, the number of bits of the signal bit information can be an integer multiple of the number of bits of the bit information mapped by one OFDM symbol, the detection reliability and low complexity of the LP-WUR can be ensured, and no redundant bits need to be sent.

[0034] In an optional manner, when the determination manner is manner five, the value of the transmission times of the bit information corresponding to one terminal identifier or one terminal sub-group identifier associated with the low-power signal in the low-power signal is 1 or 2 or 3 or 4; or, when the determination manner is manner five, the value of the repetition times of the bit information corresponding to one terminal identifier or one terminal sub-group identifier associated with the low-power signal in the low-power signal is 1 or 2 or 3; when the determination manner is manner six, the value of the transmission times of the bit information corresponding to one terminal identifier or one terminal sub-group identifier associated with the low-power signal in the low-power signal is 1 or 2 or 3; when the determination manner of the low-power signal is manner six, the value of the repetition times of the bit information corresponding to one terminal identifier or one terminal sub-group identifier associated with the low-power signal in the low-power signal is 1 or 2.

[0035] Based on this, the number of bits of the signal bit information can be an integer multiple of the number of bits of the bit information mapped by one OFDM symbol, the detection reliability and low complexity of the LP-WUR can be ensured, and no redundant bits need to be sent.

[0036] In an optional manner, the low-power signal includes cyclic redundancy check (CRC) bit information.

[0037] Based on this, the CRC bit information is included in the signal bit information of the low-power signal, the detection performance of the terminal can be improved, the false alarm rate is reduced, and the terminal energy saving is facilitated.

[0038] In a third aspect, a communication method is provided. The method can be executed by a first communication device, which can be a network device, a chip or a circuit. The method can be applied in a 5G communication system or a communication system above 5G. The method can also be applied in a non-terrestrial communication system, etc. Optionally, the chip can be a chip in a network device. The present application does not limit this. Optionally, the circuit can be a circuit in a network device. The present application does not limit this. The method is executed as follows:

[0039] A low-power signal is sent, the low-power signal includes signal bit information and padding bit information, the signal bit information is associated with a terminal or a terminal sub-group, the signal bit information and the padding bit information are mapped to at least one OFDM symbol, and the signal bit information is before the padding bit information.

[0040] In a fourth aspect, the present application provides a communication method, which can be performed by a second communication device, which can be a terminal, a chip or a circuit. The method can be applied in a 5G communication system or a communication system above 5G. The method can also be applied in a non-terrestrial communication system, etc. Optionally, the chip can be a chip in a terminal. The present application does not limit this. Optionally, the circuit can be a circuit in a terminal. The present application does not limit this. The method is executed as follows:

[0041] receiving a low-power signal, the low-power signal comprising signal bit information and padding bit information, the signal bit information being associated with a terminal or a terminal subgroup, the signal bit information and the padding bit information being mapped to at least one OFDM symbol, the signal bit information being before the padding bit information.

[0042] In the present application, the signal bit information and the padding bit information are mapped to at least one OFDM symbol, which can ensure the balance of the energy within the OFDM symbol and does not increase the complexity of the terminal detecting the low-power signal.

[0043] In combination with the third aspect or the fourth aspect, in an optional mode, the signal bit information is associated with the terminal or the terminal subgroup, comprising one or more of the following: the signal bit information is used to determine one or more terminal identities; the signal bit information is used to determine one or more terminal subgroup identities; the signal bit information is used to indicate whether to wake up one or more terminals for information transmission; the signal bit information is used to indicate whether to wake up a terminal in one or more terminal subgroups for information transmission.

[0044] Based on this, after the terminal demodulates the signal bit information of the low-power signal, it can be clear to perform which operation, and different operations will bring different false alarm rates, false detection rates and resource occupation rates, achieving more flexibility.

[0045] In combination with the third aspect or the fourth aspect, in an optional mode, the information transmission comprises one or more of the following modes: monitoring PDCCH, transmitting UCI, transmitting PUCCH, transmitting PUSCH, receiving PDSCH, receiving SSB, receiving CSI-RS, or receiving TRS.

[0046] In combination with the third aspect or the fourth aspect, in an optional mode, the bit value of the padding bit information is predefined.

[0047] In the mode, the terminal only needs to correlate the last OFDM symbol with a local sequence and the received low-power signal, so as to reduce the complexity of the terminal algorithm. For the network device, the network device can generate the low-power signal according to the low-power signal generation mode specified in the protocol, and when the signal bit information of the low-power signal cannot occupy a complete OFDM symbol, the fixed bit value is used to fill the bit information, so as to realize lower complexity.

[0048] In combination with the third aspect or the fourth aspect, in an optional mode, the first communication device sends indication information, and the indication information indicates the bit value of the padding bit information.

[0049] By indicating the bit value of the padding bit information by the first communication device, the mode is more flexible, and meanwhile, the network can adjust the bit value of the padding bit information in combination with the wake-up indication of other terminals, so as to ensure the orthogonality of the signal bit information between different terminals and improve the detection performance.

[0050] In combination with the third aspect or the fourth aspect, in an optional mode, the bit value of each bit of the padding bit information is 1 or 0.

[0051] In combination with the third aspect or the fourth aspect, in an optional mode, the bit value of the padding bit information is associated with the bit value of the signal bit information of the low-power signal.

[0052] When the bit value of the padding bit information is associated with the bit value of the signal bit information of the low-power signal, the padding bit information can be used as the check bit information of the signal bit information, so as to improve the detection performance of the signal bit information and improve the coverage performance of the low-power signal.

[0053] In combination with the third aspect or the fourth aspect, in an optional mode, the number of bits of the padding bit information is K, the number of bits of the signal bit information is N1+N2, the number of at least one OFDM symbol is L, the first L-1 OFDM symbols are mapped with the first N1 bits of the signal bit information, the Lth OFDM symbol is mapped with the last N2 bits of the signal bit information and the K bits of the padding bit information, the bit value of the K bits is associated with the bit information mapped in the T1th OFDM symbol, and the last N2 bits of the signal bit information are before the K bits of the padding bit information, wherein K, L, N1, N2 and L-1 are positive integers, and T1 is a positive integer less than L.

[0054] When the bit value of the padding bit information is associated with the bit value of the signal bit information of the low-power signal, the padding bit information can be used as the check bit information of the signal bit information, so as to improve the detection performance of the signal bit information and improve the coverage performance of the low-power signal.

[0055] In an optional manner, in combination with the third aspect or the fourth aspect, the bit information mapped by the T1th OFDM symbol includes a first bit and a second bit, the second bit is before the first bit, and the bit values of the K bits associated with the bit information mapped by the T1th OFDM symbol include: the bit values of the K bits are the same as the bit value of the first bit, and the number of bits corresponding to the K bits is the same as the number of bits corresponding to the first bit.

[0056] This manner is similar to sending the same sequence twice, can reduce the performance impact caused by channel fading, improve the coverage performance of the low-power signal, and reduce the false alarm rate or false detection rate of the low-power signal.

[0057] In an optional manner, in combination with the third aspect or the fourth aspect, the bit values of the N2 bits are the same as the bit value of the second bit, and the number of bits corresponding to the N2 bits is the same as the number of bits corresponding to the second bit; or, the bit information corresponding to the N2 bits is based on OOK modulation, the first bit is based on the first modulation, and the first modulation does not include OOK modulation.

[0058] When the bit values of the padding bits are associated with the bit values of the bit information of the low-power signal, the detection performance of the low-power signal can be improved, and the coverage performance can be improved.

[0059] In an optional manner, in combination with the third aspect or the fourth aspect, the first modulation is used to represent different bit states of the signal bit information of the low-power signal by different sequences, and / or the first modulation is used to represent different bit states of the signal bit information of the low-power signal by different phases, and / or the first modulation is used to represent different bit states of the signal bit information of the low-power signal by different cyclic shifts of the same sequence.

[0060] In this manner, more information can be carried by the sequence or the phase, the low-power signal occupies fewer resources when transmitting the same bit information, the network resource overhead is reduced, and the different phases or sequences have good autocorrelation and cross-correlation, which can improve the detection performance of the terminal and improve the coverage performance of the low-power signal.

[0061] In an optional manner, in combination with the third aspect or the fourth aspect, the low-power signal further includes CRC bit information.

[0062] Based on this, the CRC bit information is included in the signal bit information of the low-power signal, which can increase the detection performance of the terminal, reduce the false alarm rate, and further facilitate energy saving of the terminal.

[0063] In a fifth aspect, an embodiment of the present application provides a communication apparatus, which can be a terminal or a network device. The communication apparatus has the functions of the above-mentioned first aspect to fourth aspect, for example, the communication apparatus includes modules or units or means corresponding to the steps of the above-mentioned first aspect to fourth aspect. The functions of the modules or units or means can be implemented by software or by hardware, or by a combination of software and hardware.

[0064] In a possible design, the communication apparatus includes a processing unit and a transceiver. The transceiver can be configured to transceive signals to implement communication between the communication apparatus and another apparatus. The processing unit can be configured to perform some internal operations of the communication apparatus. The transceiver can be referred to as an input / output unit, a communication unit, etc. The transceiver can be a transceiver. The processing unit can be a processor, a processing circuit, a logic circuit, etc.

[0065] In another possible design, the communication apparatus includes a processor and a transceiver. The transceiver can be configured to transceive signals. The processor can execute program instructions to perform the method in any possible design or implementation manner of the above-mentioned first aspect to fourth aspect. The communication apparatus can further include one or more memories. The memory can be coupled to the processor. The memory can store necessary computer programs or instructions for implementing the functions related to the above-mentioned first aspect to fourth aspect. The processor can execute the computer programs or instructions stored in the memory. When the computer programs or instructions are executed, the communication apparatus can implement the method in any possible design or implementation manner of the above-mentioned first aspect to fourth aspect.

[0066] In another possible design, the communication apparatus includes a processor. The processor can be configured to be coupled to a memory. The memory can store necessary computer programs or instructions for implementing the functions related to the above-mentioned first aspect to fourth aspect. The processor can execute the computer programs or instructions stored in the memory. When the computer programs or instructions are executed, the communication apparatus can implement the method in any possible design or implementation manner of the above-mentioned first aspect to fourth aspect.

[0067] In another possible design, the communication apparatus includes a processor and an interface circuit. The processor can be configured to communicate with another apparatus through the interface circuit, and perform the method in any possible design or implementation manner of the above-mentioned first aspect to fourth aspect.

[0068] It can be understood that, in the fifth aspect, the processor can be implemented by hardware or software. When implemented by hardware, the processor can be a logic circuit, an integrated circuit, etc. When implemented by software, the processor can be a general-purpose processor, which implements by reading software codes stored in the memory. In addition, the processor can be one or more, and the memory can be one or more. The memory can be integrated with the processor, or the memory can be arranged separately from the processor. In the implementation process, the memory can be integrated on the same chip as the processor, or can be arranged on different chips respectively. The type of the memory and the arrangement manner of the memory and the processor are not limited in the embodiments of the present application.

[0069] In a sixth aspect, the embodiments of the present application provide a communication system, which comprises the first communication device and the second communication device.

[0070] In a seventh aspect, the present application provides a chip system, which comprises a processor and can further comprise a memory, and is used to implement the method in the first aspect to the fourth aspect. The chip system can be composed of a chip, or can comprise a chip and other discrete devices.

[0071] In an eighth aspect, the present application further provides a computer readable storage medium, which can be a volatile storage medium or a non-volatile storage medium. The computer readable storage medium stores computer readable instructions. When the computer readable instructions run on a computer, the computer executes the method in the first aspect to the fourth aspect.

[0072] In a ninth aspect, the present application provides a computer program product comprising instructions, which, when run on a computer, cause the computer to execute the method in the embodiments of the first aspect to the fourth aspect. BRIEF DESCRIPTION OF DRAWINGS

[0073] FIG. 1 shows a schematic diagram of a communication system;

[0074] FIG. 2 shows a schematic diagram of a low-power wake-up circuit;

[0075] FIG. 3 shows a schematic diagram of OOK modulation;

[0076] FIG. 4 shows a schematic diagram of OFDM modulation;

[0077] FIG. 5 shows a schematic diagram of a low-power signal generation mode;

[0078] FIG. 6 shows a schematic diagram of a low-power signal generation mode;

[0079] FIG. 7 shows a schematic diagram of a low-power signal generation mode;

[0080] FIG. 8 shows a schematic diagram of a low-power consumption signal generation manner;

[0081] FIG. 9 shows a flow diagram of a communication method according to an embodiment of the present application;

[0082] FIG. 10A shows a schematic diagram of a low-power consumption signal generation manner according to an embodiment of the present application;

[0083] FIG. 10B shows a schematic diagram of a low-power consumption signal generation manner according to an embodiment of the present application;

[0084] FIG. 10C shows a schematic diagram of a low-power consumption signal generation manner according to an embodiment of the present application;

[0085] FIG. 10D shows a schematic diagram of a low-power consumption signal generation manner according to an embodiment of the present application;

[0086] FIG. 10E shows a schematic diagram of a low-power consumption signal generation manner according to an embodiment of the present application;

[0087] FIG. 11 shows a flow diagram of a communication method according to an embodiment of the present application;

[0088] FIG. 12 shows a schematic diagram of a low-power consumption signal generation manner according to an embodiment of the present application;

[0089] FIG. 13A shows a schematic diagram of a low-power consumption signal generation manner according to an embodiment of the present application;

[0090] FIG. 13B shows a schematic diagram of a low-power consumption signal generation manner according to an embodiment of the present application;

[0091] FIG. 14A shows a schematic diagram of a low-power consumption signal generation manner according to an embodiment of the present application;

[0092] FIG. 14B shows a schematic diagram of a low-power consumption signal generation manner according to an embodiment of the present application;

[0093] FIG. 15 shows a structural diagram of a communication apparatus according to an embodiment of the present application;

[0094] FIG. 16 shows a structural diagram of a communication apparatus according to an embodiment of the present application;

[0095] FIG. 17 shows a structural diagram of a communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0096] In order to make the purposes, technical solutions and advantages of the present application clearer, further detailed description will be made to the present application with reference to the drawings. The specific operation methods in the method embodiments can also be applied to the device embodiments or system embodiments. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more than two. The association relationship of the associated objects is described, which means that there can be three relationships, for example, A and / or B, which can represent the following cases: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after it. For example, A / B represents A or B. In the formula of the present application, the character " / " represents a "division" relationship between the associated objects before and after it. "Including at least one of A, B and C" can represent: including A; including B; including C; including A and B; including A and C; including B and C; including A, B and C. "At least one of the following" or similar expressions means any combination of these items, including any combination of single item or multiple items. For example, at least one of a, b or c means: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b and c can be single or multiple.

[0097] The ordinal numbers "first", "second", etc. mentioned in the embodiments of the present application are used to distinguish a plurality of objects, and are not used to limit the size, content, order, time sequence, priority or importance of the plurality of objects. In addition, the numbering of steps in each embodiment introduced in the present application is only to distinguish different steps, and is not used to limit the order of the steps.

[0098] The technical solutions provided by the embodiments of the present application can be applied to a 5G system, or to a future communication system or other similar communication system. In addition, the technical solutions provided by the embodiments of the present application can be applied to a cellular link, a public land mobile network (PLMN), a machine to machine (M2M) network, an internet of things (IoT) network or other network. It can also be applied to a link between devices, such as a device to device (D2D) link. The D2D link can also be referred to as a sidelink, which can also be referred to as a side link or a secondary link, etc. In the embodiments of the present application, the above-mentioned terms all refer to a link established between devices of the same type, and have the same meaning. The so-called devices of the same type can be a link between terminals to terminals, or a link between base stations to base stations, or a link between relay nodes to relay nodes, etc., which are not limited in the embodiments of the present application.

[0099] Figure 1 is a schematic diagram of the architecture of a communication system 1000 to which embodiments of the present application are applied. As shown in Figure 1, the communication system includes a radio access network 100 and a core network 200, and optionally, the communication system 1000 can further include an Internet 300. The radio access network 100 can include at least one radio access network device (e.g., 110a and 110b in Figure 1) and at least one terminal (e.g., 120a-120j in Figure 1). The terminal is connected to the radio access network device in a wireless manner, and the radio access network device is connected to the core network in a wireless or wired manner. The core network device and the radio access network device can be independent and different physical devices, or can be integrated into the same physical device with the functions of the core network device and the logical functions of the radio access network device, or can be a physical device integrated with part of the functions of the core network device and part of the functions of the radio access network device. The terminals and the terminals, and the radio access network devices and the radio access network devices can be connected to each other in a wired or wireless manner. Figure 1 is only a schematic diagram, and the communication system can further include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in Figure 1.

[0100] The radio access network device can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a 5G mobile communication system, a next generation base station in a mobile communication system, a base station in a future mobile communication system, an access node in a WiFi system, etc., or a module or unit that implements part of the functions of a base station. In some deployments, a gNB can include a central unit (CU) and a distributed unit (DU). The CU implements part of the functions of the gNB, and the DU implements part of the functions of the gNB. Illustratively, the CU is responsible for processing non-real-time protocols and services. For example, it implements radio resource control (RRC), service data adaptation protocol (SDAP) functions, functions of the packet data convergence protocol (PDCP) layer, etc. The DU is responsible for processing physical layer protocols and real-time services. For example, it implements functions of the radio link control (RLC) layer, the medium access control (MAC) layer, and the physical (PHY) layer, etc. The gNB can also include an active antenna unit (AAU). The AAU implements part of the physical layer processing functions, radio frequency processing, and related functions of the active antenna. Since the information of the RRC layer eventually becomes the information of the PHY layer, or is converted from the information of the PHY layer. Therefore, in this architecture, high-layer signaling (such as RRC layer signaling) can also be considered as being sent by the DU, or by the DU and the AAU. It can be understood that the network device can be a device including one or more of the CU node, the DU node, and the AAU node. In addition, the CU can be a network device in a radio access network (RAN), and the CU can be a network device in a core network (CN), which is not limited in the present application. In addition, in the embodiments of the present application, the network device serves a cell, and a terminal communicates with the network device by using transmission resources (for example, frequency domain resources, or spectrum resources) of the cell. The cell can be a cell corresponding to the network device (for example, a base station). The cell can belong to a macro base station, or belong to a base station corresponding to a small cell.Exemplarily, the small cell can include a metro cell, a micro cell, a pico cell, a femto cell, and the like. Due to the small coverage and low transmit power of the small cell, the small cell can provide a high-rate data transmission service. In addition, in other possible cases, the network device can be another apparatus providing wireless communication functions for the terminal. Embodiments of the present application do not limit the specific technology and specific device form of the network device. For example, in an open radio access network (ORAN) system, the CU can also be referred to as an O-CU (open CU), the DU can also be referred to as an O-DU, the CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, and the RU can also be referred to as an O-RU. For the convenience of description, the CU, the CU-CP, the CU-UP, the DU, and the RU are taken as examples for description in the present application. Any one of the CU (or the CU-CP, the CU-UP), the DU, and the RU in the present application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module. For specific descriptions of the above-mentioned protocol layers, reference can be made to the relevant technical specifications of the 3rd generation partnership project (3GPP). The wireless access network device can be a macro base station (such as 110a in FIG. 1), a micro base station or an indoor station (such as 110b in FIG. 1), a relay node or a donor node, and the like. Embodiments of the present application do not limit the specific technology and specific device form of the wireless access network device.

[0101] The terminal can also be referred to as a user equipment (UE), a mobile station, a mobile terminal (MT), and the like. The terminal can be widely applied to various scenarios, such as device-to-device (D2D) communication, vehicle to everything (V2X) communication, machine-type communication (MTC), internet of things (IOT), virtual reality, augmented reality, industrial control, autonomous driving, remote medical treatment, smart power grid, smart furniture, smart office, smart wear, smart transportation, smart city, and the like. The terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, a drone, a helicopter, an airplane, a ship, a robot, a mechanical arm, a smart home device, and the like. Embodiments of the present application do not limit the specific technology and specific device form of the terminal.

[0102] The network device and the terminal can be fixed in position or movable. The network device and the terminal can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can be deployed on water; and can be deployed on an airplane, a balloon, and a man-made satellite. Embodiments of the present application do not limit the application scenarios of the network device and the terminal.

[0103] The roles of the network device and the terminal can be relative. For example, the helicopter or the unmanned aerial vehicle 120i in FIG. 1 can be configured as a mobile network device, and for the terminal 120j that accesses the wireless access network 100 through 120i, 120i is a network device; but for the network device 110a, 120i is a terminal, that is, 110a communicates with 120i through a wireless air interface protocol. Of course, 110a and 120i can also communicate through an interface protocol between network devices, and in this case, 120i is also a network device relative to 110a. Therefore, the network device and the terminal can be collectively referred to as a communication apparatus, and 110a and 110b in FIG. 1 can be referred to as a communication apparatus with a network device function, and 120a-120j in FIG. 1 can be referred to as a communication apparatus with a terminal function.

[0104] The network device and the terminal, the network device and the network device, and the terminal and the terminal can communicate through an authorized frequency spectrum, can communicate through an unlicensed frequency spectrum, and can communicate through both the authorized frequency spectrum and the unlicensed frequency spectrum; can communicate through a frequency spectrum below 6 gigahertz (GHz), can communicate through a frequency spectrum above 6 GHz, and can communicate through both the frequency spectrum below 6 GHz and the frequency spectrum above 6 GHz. Embodiments of the present application do not limit the frequency spectrum resources used for wireless communication.

[0105] In embodiments of the present application, the functions of the network device can also be performed by a module (such as a chip) in the network device or a control subsystem containing network device functions. The control subsystem containing network device functions herein can be a control center in the above-mentioned application scenarios such as smart grids, industrial control, intelligent transportation, and smart cities. The functions of the terminal can also be performed by a module (such as a chip or a modem) in the terminal or a device containing terminal functions.

[0106] To further reduce power consumption, the UE can also use a circuit different from the MR to receive signals, for example, referred to as an LP-WUR (wherein the LP-WUR can be referred to as a low-power wake-up receiver, a secondary receiver, a low-power receiver, a low-power wake-up receiver, etc., which is not specifically limited herein). The LP-WUR can be implemented by a simple circuit or chip structure, and has low power consumption. The LP-WUR is used to receive an LP-WUS from a network device. When the UE detects or receives an LP-WUS, the UE demodulates wake-up indication information according to information carried in the LP-WUS, and wakes up the MR that is turned off (or in a sleep state) in the UE. The LP-WUS can be used to wake up at least one UE or at least one group of UEs. To reduce the power consumption of the LP-WUR circuit, the LP-WUS signal is usually modulated by using some simple modulation method such as OOK; accordingly, the LP-WUR in the UE receives the LP-WUS by using envelope detection. The UE using the LP-WUR to receive a wake-up signal can be referred to as operating on a WUR / LR link, or as being in a WUR / LR working state.

[0107] For example, the UE can first search for a signal of an NR primary link in the MR when it is powered on, and if the signal of the NR primary link can be searched, the UE can camp on the NR primary link. If the signal of the NR primary link indicates configuration information of an LP-WUS, the UE can further search for the LP-WUS in the LP-WUR according to the configuration information of the LP-WUS, and if the LP-WUS can be searched and the signal quality of the LP-WUS is good, the UE can work in the LP-WUR. Alternatively, the UE can first search for a signal of an NR primary link in the MR when it is powered on, and if the signal of the NR primary link cannot be searched, the UE can search for an LP-WUS according to configuration information preset in the UE, and if the LP-WUS can be searched and the signal quality of the LP-WUS is good, the UE can work in the LP-WUR.

[0108] Referring to FIG. 2, a schematic diagram of working modes of the LP-WUR and the MR is shown, and in FIG. 2, the LP-WUR is taken as an example of a low-power circuit. After the UE works in the low-power circuit, if the UE detects an LP-WUS, the UE can trigger to turn on the MR to receive a page, monitor a PDCCH, receive an SSB, receive a TRS, or initiate random access, etc.; if the UE does not detect the LP-WUS and the UE is in a coverage range of the LP-WUS, the UE does not report processing information to a network device, and the UE can not trigger to turn on the MR, and the MR can continue to be turned off (or continue to be in a sleep state), thereby reducing the working time of the MR to save the power consumption of the UE.

[0109] The following first explains the related terms involved in the embodiments of the present application. When not specifically explained, these explanations are to support the meaning of the related terms and make the embodiments of the present application easier to understand, and should not be regarded as a strict limitation on the related terms in the protection scope claimed by the present application.

[0110] 1) low-power signal (or referred to as low-power wake-up signal)

[0111] In addition to the LP-WUS, the embodiments of the present application do not limit the type of low-power signal. For example, the low-power signal can be a low-power PDCCH, a low-power PDSCH, a low-power PUSCH, a low-power PUCCH, a low-power SSB, a low-power synchronization signal, a low-power TRS, a low-power CSI-RS, a low-power positioning signal, a low-power sensing communication signal, a low-power SRS signal, a low-power RACH signal, a low-power preamble signal, a low-power contention resolution message, a low-power DCI signal, or a low-power UCI signal, etc. The size of the bit information of the low-power signal is determined by one or more of the following: the physical layer, the core network, the MAC layer, the RLC layer, the PDCP layer, the SDAP layer, the RRC layer, or the core network.

[0112] The signal bit information of the low-power consumption signal can be associated with a terminal or a terminal subgroup. For example, when the terminal is in an unconnected state (e.g., an idle state of the terminal or an inactive state of the terminal), the signal bit information can be used to determine one or more terminal identities or one or more terminal subgroup identities. When the terminal is in a connected state, the signal bit information can be used to indicate whether to wake up one or more terminals for information transmission, or the signal bit information can be used to indicate whether to wake up terminals in one or more terminal subgroups for information transmission, or the signal bit information can be used to determine one or more terminal identities, or the signal bit information can be used to determine one or more terminal subgroup identities. Based on this, the terminal can determine the operation to be performed after demodulating the signal bit information of the low-power consumption signal, and different operations can result in different false alarm rates, false detection rates, and resource occupation rates, thereby achieving greater flexibility. For example, the low-power consumption signal has 8 bits, and 8 bits are used to determine a plurality of terminal identities, and 8 bits are used to determine a terminal identity. For a terminal identity, 8 bits are used to determine a terminal identity, which occupies more bits. In addition, the terminal detects one of the 8 bits to determine whether to wake up the main receiver of the terminal, which has a higher false detection rate than detecting 8 bits to determine whether to wake up the main receiver. In addition, the terminal detects one of the 8 bits to determine whether to wake up the main receiver of the terminal, which has a lower false alarm rate (i.e., the probability of determining whether to wake up the main receiver of the terminal) than detecting 8 bits to determine whether to wake up the main receiver.

[0113] The above information transmission can include one or more of the following: monitoring PDCCH, transmitting UCI, transmitting PUCCH, transmitting PUSCH, receiving PDSCH, receiving SSB, receiving CSI-RS, or receiving TRS. Here, only exemplary descriptions are provided, and the specific manner of information transmission is not specifically limited. For example, after the main receiver of the terminal is woken up, the terminal can monitor PDCCH and receive PDSCH on the resource specified by the network device, and the like. Alternatively, the terminal can receive SSB, CSI-RS, TRS, and the like on the specified resource. Alternatively, the terminal can transmit UCI and PUSCH to the network device, thereby avoiding blind transmission or reception of information, reducing the invalid opening of the high-power consumption receiver, and achieving terminal energy saving. Here, only exemplary descriptions are provided, and the specific behavior of information transmission is not specifically limited. In addition, the terminal can multiplex the above information to carry service data. For example, the terminal can transmit location information and sensing information to the network device through an uplink signal, and the like. Here, the specific information transmission is not specifically limited.

[0114] In addition, the low-power consumption signal can include CRC bit information. When the CRC bit information is included in the low-power consumption signal, the terminal first checks whether the CRC bit information is correct, and determines the signal bit information corresponding to itself in the low-power consumption signal only after determining that the CRC bit information is correct. This manner can avoid interference of invalid low-power consumption signals, further improves the detection performance of the terminal, reduces the false alarm rate, and when the CRC check is abnormal, the main receiver of the terminal is not woken up, thereby saving the energy consumption of the terminal.

[0115] When the terminal is in idle state or non-connected state, the main receiver is closed or in sleep state. The network device sends a low-power signal to the terminal, and the terminal opens the low-power receiver to receive the low-power signal from the network device. The terminal determines whether to wake up the main receiver according to the indication carried in the low-power signal, or the terminal identifier, or the terminal group identifier, or the terminal sub-group identifier, etc. The terminal receives the paging message from the network device by using the main receiver. The terminal performs random access or other operations according to the indication of the paging message. When the terminal is in idle state or non-connected state, the low-power signal can be called a low-power wake-up signal. For example, the low-power signal carries the information for paging the terminal, such as the identifier of the terminal, the group identifier of the terminal, or the sub-group identifier of the terminal, etc. When the terminal receives the low-power signal, the terminal matches (correlates) the information in the low-power signal with the information of the terminal. If the two match (the correlation value is large or greater than a threshold value), it is considered that the network device is paging itself. Further, the terminal can perform random access or other operations according to the indication of the low-power signal, without limitation. The receiver for performing random access or other operations can be the main receiver or the low-power receiver of the terminal. For example, the signal bit information can be used to determine two terminal identifiers, the number of bits of each terminal identifier is 4, and the signal bit information of the low-power signal is 11010010, wherein 1101 is the identifier of terminal #1 and 0010 is the identifier of terminal #2. If the first 4 bits of the low-power signal detected by terminal #1 are 1101, it indicates that the network is paging terminal #1, and terminal #1 wakes up the main receiver. If the first 4 bits of the low-power signal detected by terminal #1 are not 1101, terminal #1 does not wake up the main receiver. Similarly, terminal #2 detects the last 4 bits of the low-power signal. If the last 4 bits of the low-power signal detected by terminal #2 are 0010, it indicates that the network is paging terminal #2, and terminal #2 wakes up the main receiver. If the last 4 bits of the low-power signal detected by terminal #2 are not 0010, terminal #2 does not wake up the main receiver. For another example, the signal bit information can be used to determine two terminal sub-group identifiers, the number of bits of each terminal sub-group identifier is 4, and the signal bit information of the low-power signal is 11010010, wherein 1101 is the identifier of terminal sub-group 1 and 0010 is the identifier of terminal sub-group 2. If the first 4 bits of the signal bit information of the low-power signal sent by the network device are 1101, it indicates that the network is paging terminal sub-group 1, and the main receivers of all terminals belonging to terminal sub-group 1 are woken up. If the first 4 bits of the signal bit information of the low-power signal detected by the terminal belonging to terminal sub-group 1 are not 1101, the main receivers of all terminals belonging to terminal sub-group 1 are not woken up.Similarly, if the last 4 bits of the signal bit information of the low-power signal sent by the network device are 0010, it indicates that the network is paging terminal subgroup 2, and the main receiver of all terminals belonging to terminal subgroup 2 is woken up. If the last 4 bits of the signal bit information of the low-power signal detected by the terminal belonging to terminal subgroup 2 are not 0010, the main receiver of all terminals belonging to terminal subgroup 2 is not woken up. This is only an example and is not specifically limited. It should be noted that if the low-power signal includes CRC check bits, both terminal #1 and terminal #2 need to detect the signal bit information of the entire low-power signal, and then determine whether the bit information corresponding to itself matches the sequence stored locally.

[0116] It should be noted that the above "low-power signal is used to indicate whether to wake up the main receiver" can be replaced by: the low-power signal is used to indicate whether the network device sends a paging message to page the terminal, or can be replaced by: the low-power signal is used to indicate whether the terminal monitors the PDCCH, or can be replaced by: the low-power signal is used to indicate whether the terminal receives a paging message. When the indication information carried in the low-power signal is used to indicate waking up or turning on the main receiver or switching the main receiver from a sleep state to a state capable of receiving the PDCCH, or when the information (for example, terminal identifier, terminal group identifier, or terminal subgroup identifier) carried in the low-power signal matches the information stored locally by the terminal, it indicates that the network device will subsequently page the terminal. At this time, the terminal can turn on or wake up the main receiver or switch the main receiver from a sleep state to a state capable of receiving the PDCCH, receive a paging message, or perform random access. Otherwise, when the information carried in the low-power signal does not match the information stored locally by the terminal, it indicates that the network device will not subsequently page the terminal. At this time, the terminal can not turn on or wake up the main receiver or the main receiver can always be in a deeper sleep state, further saving the power consumption of the terminal. The information stored locally by the terminal includes one or more of the following: terminal identifier, terminal group identifier, and terminal subgroup identifier.

[0117] In the connected state of the terminal, the main receiver is in a lighter sleep state, the network device sends a low-power signal to the terminal, and the terminal receives the low-power signal from the network device by using the opened low-power receiver. When the indication information carried in the low-power signal is used to indicate to wake up or open the main receiver, or when the information carried in the low-power signal matches the information of the terminal, the main receiver is woken up. The terminal receives the downlink information such as downlink control information or downlink data information or a synchronization signal from the network device by using the main receiver. It can be understood that the downlink control information can be transmitted in the PDCCH, and the downlink data information can be transmitted in the PDSCH. Based on the above, the terminal receives the downlink control information or the downlink data information from the network device by using the main receiver, which can be described as that the terminal receives the PDCCH or the PDSCH and the like from the network device by using the main receiver. Alternatively, the terminal sends uplink information such as uplink control information or uplink data information to the network device by using the main receiver. It can be understood that the uplink control information can be transmitted in the PUCCH, and the uplink data information can be transmitted in the PUSCH. The above, the terminal sends the uplink control information or the uplink data information to the network device by using the main receiver, which can be described as that the terminal sends the PUCCH or the PUSCH and the like to the network device by using the main receiver. For example, the signal bit information in the form of a bit map can be used to indicate whether to wake up four terminals for information transmission. The information bit information is 1001, 1 indicates to wake up the main receiver to transmit the PUCCH, and 0 indicates not to wake up the main receiver to transmit the PUCCH, wherein 1001 corresponds to UE1, UE2, UE3 and UE4 respectively. Then, UE1 and UE4 receive the low-power signal, and then wake up the main receiver corresponding to UE1 and UE4 to transmit the PDCCH. UE2 and UE3 receive the low-power signal, and then do not wake up the main receiver corresponding to UE2 and UE3 to transmit the PDCCH. Here, only an example is described, and is not specifically limited. In the connected state of the terminal, if the low-power signal is used to determine the terminal identification information, the above examples of the terminal in the idle state or the non-connected state can be referred to for understanding.

[0118] It should be noted that the above "low-power signal is used to indicate whether to wake up the main receiver" can be replaced by: the low-power signal is used to indicate whether the network device sends downlink information to the terminal, and can also be replaced by: the low-power signal is used to indicate whether the terminal sends uplink information to the network device, and can also be replaced by: the low-power signal is used to indicate whether the terminal monitors the PDCCH, and can also be replaced by: the low-power signal is used to indicate whether there is data transmission. When the indication information carried in the low-power signal is used to indicate to wake up or turn on the main receiver, or when the information carried in the low-power signal matches the information of the terminal, it indicates that the network device will subsequently send downlink information to the terminal, or instruct the terminal to send uplink information to the network device. At this time, the terminal can turn on or wake up the main receiver to receive downlink information or send uplink information. It should be noted that if the low-power signal includes CRC check bits, the terminal needs to detect all the bit information of the low-power signal, and then determine whether the corresponding bit information matches the locally stored sequence.

[0119] When the low-power signal is used to explicitly or implicitly indicate not to wake up or not to turn on the main receiver, or when the information carried in the low-power signal does not match the locally stored information of the terminal, it indicates that the network device does not send downlink information to the terminal or does not schedule the terminal to send uplink information in the subsequent period of time. Alternatively, the subsequent period of time is one or more paging cycles or one or more discontinuous reception (DRX) cycles. At this time, the terminal can continue to keep the main receiver off or in a sleep state.

[0120] 2) Type of WUR

[0121] The bit information of the LP-WUS has multiple mapping ways to the time unit, or in other words, the bit information of the LP-WUS has multiple modulation ways. For example, the LP-WUS can adopt OOK modulation, and accordingly, the WUR in the terminal receives the LP-WUS in the envelope detection manner. For another example, the WUS can also adopt OFDM waveform transmission, and accordingly, the WUR in the terminal receives the LP-WUS in the phase detection manner. For convenience of description, in the embodiments of the present application, the LP-WUS adopting OFDM waveform transmission is referred to as the LP-WUS adopting OFDM modulation (which will be introduced below).

[0122] The WUR receiving the LP-WUS in the phase detection manner can be regarded as a type of receiver (for example, referred to as a first type of WUR), and the WUR receiving the LP-WUS in the envelope detection manner can be regarded as another type of WUR (for example, referred to as a second type of WUR). The first type of WUR and the second type of WUR are relative, and there are multiple interpretations for the first type of WUR and the second type of WUR, which will be illustrated below.

[0123] 2.1) The first type of WUR is an OFDM receiver, and the second type of WUR is an OOK receiver.

[0124] 2.2) The first type of WUR is a receiver with both I / Q paths, and the second type of WUR is a receiver with only one of the I / Q paths.

[0125] 2.3) The first type of WUR is a coherent receiver, and the second type of WUR is a non-coherent receiver.

[0126] 2.4) The first type of WUR is a coherent receiver with both I / Q paths, and the second type of WUR is a non-coherent receiver with only one of the I / Q paths.

[0127] 2.5) The first type of WUR receives signals in a phase detection manner, and the second type of WUR receives signals in an energy / power / amplitude detection manner. Alternatively, the first type of WUR can / able to detect phase information, and the second type of WUR can / able to detect signal energy / power / amplitude.

[0128] 2.6) The first type of WUR can receive complex signals, and the second type of WUR cannot receive complex signals (e.g., the second type of WUR receives real signals).

[0129] 2.7) The first type of WUR has a phase detection capability, and the second type of WUR has an envelope detection capability or no phase detection capability. Alternatively, the first type of WUR supports receiving signals in a phase detection manner, and the second type of WUR supports receiving signals in an envelope detection manner. In embodiments of the present application, the phase detection capability can be replaced by a correlation detection capability and a sequence detection capability.

[0130] 2.8) The first type of receiver can receive OFDM signals, and the second type of receiver cannot receive OFDM signals (e.g., the second type of receiver receives OOK signals).

[0131] 3) OOK modulation and OFDM modulation

[0132] OOK modulation represents digital information by the presence or absence of a signal. Bit information corresponding to a signal is mapped to at least one time unit through OOK modulation, one time unit corresponds to one bit of information, and the bit information of the signal is determined by detecting whether there is a signal on the time unit. There is a signal on the time unit means that the signal amplitude on the time unit is not zero, such a time unit is also called an ON time unit, or the time unit is in an ON mode; correspondingly, there is a signal on the time unit means that the signal amplitude on the time unit is zero, such a time unit is also called an OFF time unit, or the time unit is in an OFF mode. Generally, if a sequence is sent on a time unit, the time unit has a signal; if no sequence is sent on a time unit, the time unit has no signal. For a time unit, the time unit is an ON time unit or the time unit is in an ON mode, which can be decoded as 1; correspondingly, the time unit is an OFF time unit or the time unit is in an OFF mode, which can be decoded as 0.

[0133] Referring to FIG. 3, the principle of OOK modulation is shown. FIG. 3 takes the bit information of the signal as 1001 as an example. The 4-bit information is mapped to 4 time units (for example, time unit 1-time unit 4) in sequence through OOK modulation. It should be understood that time unit 1 and time unit 4 are time units with signals, and a sequence is sent on time unit 1 and time unit 4. Time unit 2 and time unit 3 are time units without signals, and no sequence is sent on time unit 2 and time unit 3. When the receiving end detects a sequence on time unit 1 and time unit 4, it can be decoded as 1. When the receiving end does not detect a sequence on time unit 2 and time unit 3, it can be decoded as 0. The receiving end combines the decoding of the 4 time units to obtain 1001. It can be seen that for OOK modulation, only 1 bit of information can be obtained in one time unit. It can be understood that the sequence of the time unit detected by the receiving end means that the receiving end detects the envelope of the signal on the time unit; correspondingly, the sequence of the time unit not detected by the receiving end means that the receiving end does not detect the envelope of the signal on the time unit.

[0134] Referring to FIG. 4, the principle of OFDM modulation is shown. FIG. 4 takes the sending end storing 4 sequences (i.e., sequence 1-sequence 4 in the figure) as an example. The 4 sequences can be used to carry / carry 2 bits of information, for example, sequence 0 corresponds to 00, sequence 1 corresponds to 01, sequence 2 corresponds to 10, and sequence 3 corresponds to 11. In a time unit, the bit information corresponding to the time unit is 01, and the access network device can determine that the bit information 01 corresponds to sequence 1 according to the correspondence between the 4 sequences and the bit information. The access network device can scramble the time unit by using sequence 1. FIG. 4 takes carrying sequence 2 as an example to illustrate.

[0135] As can be seen from FIG. 4, in addition to obtaining 1-bit information through the ON / OFF mode in a time unit, sequence information (e.g., 2-bit sequence information in FIG. 4) of the ON time unit can also be detected. Compared with OOK modulation, OFDM modulation can obtain more bit information. Therefore, based on OFDM modulation, if a signal of the same length of bit information is to be transmitted, the signal occupies less time domain resource compared with OOK modulation. For example, a signal of the same length of bit information needs W symbols based on OFDM modulation and G symbols based on OOK modulation, W is less than G, and W and G are positive numbers.

[0136] 4) Time unit

[0137] In embodiments of the present application, the time unit refers to a unit of time. The time unit can be a radio frame, a subframe, a slot, a mini-slot, an OFDM symbol, an hour, a minute, a second, a millisecond, a partial OFDM symbol, an OOK symbol, an OOK time unit, or a time unit of a fraction of a millisecond (e.g., 1 / 32 ms). Alternatively, the time unit is a plurality of radio frames, a plurality of subframes, a plurality of slots, a plurality of mini-slots, a plurality of OFDM symbols, a number of hours, a number of minutes, a number of seconds, a number of milliseconds, a plurality of partial OFDM symbols, a plurality of OOK symbols, a plurality of OOK time units, or a number of fractions of a millisecond. In this embodiment of the present application, one radio frame can include a plurality of subframes, one subframe can include one or more slots, and one slot can include at least one OFDM symbol. Alternatively, one radio frame can include a plurality of slots, and one slot can include at least one OFDM symbol. For convenience of distinction, in this embodiment of the present application, the time unit mapped through OOK modulation is referred to as an OOK time unit, and one OFDM symbol can include one or more OOK time units. The OOK time unit in the ON mode is also referred to as an OOK ON time unit. The OOK time unit can also be referred to as an OFDM symbol.

[0138] 5) First modulation

[0139] The first modulation does not include OOK modulation. The first modulation is a different bit state of the signal bit information of the low-power signal represented by different sequences (sequence modulation, such as the OFDM modulation described above), or the first modulation is a different bit state of the signal bit information of the low-power signal represented by different phases (phase modulation), or the first modulation is a different bit state of the signal bit information of the low-power signal represented by different cyclic shifts of the same sequence. For example, four different sequences are used to represent the bit states of four different signal bit information of the low-power signal, and the four different candidate sequences: sequence #1, sequence #2, sequence #3, and sequence #4, represent different bit states 00, 01, 10, and 11, respectively. For example, the sequence is a zc sequence or an m sequence or a gold sequence or a computer search sequence. For example, four different phases are used to represent the bit states of four different signal bit information of the low-power signal, and the four different candidate phases: 90 degrees, 180 degrees, 270 degrees, and 0 degrees, represent different bit states 00, 01, 10, and 11, respectively. For example, four different cyclic shifts of the same zc sequence are used to represent the bit states of four different signal bit information of the low-power signal, and the four different cyclic shifts are: 0, L / 4, L / 2, and 3L / 4, which represent different bit states 00, 01, 10, and 11, respectively, where L is the length of the zc sequence.

[0140] 6) Determination of the low-power signal (modulation method, and / or encoding method)

[0141] Method one, the low-power signal is based on OOK modulation (which can be understood as a modulation method)

[0142] The ON / OFF mode of the OOK modulation carries all the information of the low-power signal. For the terminal, the LP-WUS signal detection method is related to the type of LP-WUR receiver. The number of bits of the signal bit information of the low-power signal is N, the number of bits of the bit information mapped by one OFDM symbol (or the number of bits of the OOK symbol divided from one OFDM symbol) is M, and the signal bit information of the low-power signal occupies N / M OFDM symbols.

[0143] If the LP-WUR is a receiver only supporting envelope detection, the LP-WUR does energy detection on each OOK symbol. As shown in FIG. 3, the bit information of the low power signal is 1001 for example. The 4-bit information is mapped to 4 time units (e.g. time unit 1-time unit 4) in sequence after OOK modulation. It should be understood that time unit 1 and time unit 4 are time units with signal, and the sequence is transmitted on time unit 1 and time unit 4 (i.e. ON mode). Time unit 2 and time unit 3 are time units without signal, and the sequence is not transmitted on time unit 2 and time unit 3 (i.e. OFF mode). The OOK symbol without signal indicates bit state 0, and the OOK symbol with signal indicates bit state 1.

[0144] Similarly, the receiver supporting sequence detection or correlation detection can also do energy detection on each OOK symbol according to the above method. For mode one, each OOK symbol represents each time unit or each OFDM symbol described above.

[0145] Mode two, the low power signal is based on OOK modulation and based on Manchester coding (which can be understood as modulation mode and coding mode).

[0146] In which, the bit number of the signal bit information of the low power signal is N, and the signal bit information of the low power signal occupies 2N / M OFDM symbols. In order to reduce the false detection rate of the useful signal caused by the interference of the noise on the useful signal, Manchester coding is introduced, that is, the relative size of the energy of the previous and subsequent two OOK symbols is used to determine the bit state of 1 bit. As shown in FIG. 5, the energy of the first OOK symbol and the second OOK symbol is compared, and the energy of the third OOK symbol and the fourth OOK symbol is compared. The energy of the first OOK symbol is greater than the energy of the second OOK symbol, and the bit state is 0. The energy of the third OOK symbol is less than the energy of the fourth OOK symbol, and the bit state is 1. For mode two, two OOK symbols correspond to one OFDM symbol or one time unit.

[0147] Mode three, the first bit information of the low power signal is based on OOK modulation, and the modulation mode of the second bit information of the low power signal is only based on the first modulation. Optionally, the low power signal is also based on Manchester coding.

[0148] The bit quantity of the signal bit information of the low-power signal is N, the bit quantity of the bit information mapped by each symbol unit in the first symbol is X, the bit quantity of the bit information mapped by one OFDM symbol is (X+1)*M / 2, and the signal bit information of the low-power signal occupies 2N / ((X+1)*M) OFDM symbols. Part of the information N / (X+1) of the low-power signal is carried by the ON / OFF mode of the OOK modulation, and another part of the information N*X / (X+1) of the low-power signal is carried by the sequence scrambled on the OOK symbol with a signal.

[0149] It should be noted that, in the present application, the signal amplitude of the first symbol is not 0. The signal amplitude at each sampling point in the first symbol is not 0. The first symbol can also be referred to as an OOK ON symbol, an OOK ON time unit, or an OOK ON mode, and the relevant description involved in the text can be understood as the first symbol.

[0150] As shown in FIG. 6, there are four candidate sequences on the OOK ON mode (that is, the first symbol), which are sequence 1 (0 0), sequence 2 (0 1), sequence 3 (1 0), and sequence 4 (1 1), and can represent 2-bit information (that is, part of the second bit information of the low-power signal). Another part of the information (that is, part of the first bit information) is carried by the energy size relationship between the OOK ON mode and the OOK OFF mode. Based on this mode, compared with mode two, the same bit quantity of the low-power signal occupies less time domain resource. When different sequences are distinguished, the received signal is correlated with the locally stored sequence, the detection performance is better, and the coverage performance is better.

[0151] For mode three, two OOK symbols represent 1-bit information, the bit value of the signal bit information of the low-power signal in FIG. 6 is 1010, and the low-power signal is based on Manchester coding, and occupies four OOK symbols. The OOK ON mode carries 2-bit information (sequence 3: 10), and the OOK ON mode and the OOK OFF mode carry 2-bit information (1 0). For mode three, two OOK symbols correspond to one OFDM symbol or one time unit.

[0152] Mode four, the modulation mode of the low-power signal is only based on the first modulation. Alternatively, the low-power signal is also based on Manchester coding.

[0153] The whole information of the low power consumption signal is carried by the scrambled sequence in the OOK symbol with signal. The bit number of the signal bit information of the low power consumption signal is N, the bit number of the bit information mapped by each symbol unit in the first symbol is X, the bit number of the bit information mapped by one OFDM symbol is X*M / 2, and the signal bit information of the low power consumption signal occupies 2N / (X*M) OFDM symbols.

[0154] It is assumed that the whole 4-bit information of the low power consumption signal is carried by the OOK ON mode. For example, there are 16 candidate sequences in one OOK ON mode, and one OOK ON mode can carry 4-bit information. For example, there are 4 candidate sequences in one OOK ON mode, and one OOK ON mode can carry 2-bit information. If the complete bit information of the low power consumption signal is 4 bits, 2 OOK ON modes are needed to carry the whole information.

[0155] The first bit information of the low power consumption signal is based on OOK modulation, the second bit information of the low power consumption signal is based on OOK modulation and the second bit information of the low power consumption signal is based on the first modulation. Optionally, the low power consumption signal is also based on Manchester coding.

[0156] The whole information of the low power consumption signal is carried by the OOK ON / OFF mode, and in addition, the sequence carried by the OOK ON mode carries part of the information of the low power consumption signal. That is, the combination of the above-mentioned mode two and the above-mentioned mode three.

[0157] According to the mode two, a mapping is performed, and then according to the mapping mode three, a mapping is performed. Through this mode, the low power consumption signal can be detected by any type of terminal. In FIG. 7, the low power consumption signal 1011 includes 4-bit information based on Manchester coding. For the first mapping mode, the low power consumption signal is all based on OOK modulation, and the envelope detection receiver and the OFDM receiver can both demodulate the low power consumption signal based on the first mapping mode. There are 4 candidate sequences in the OOK ON mode (i.e., the first symbol), which are sequence 1 (0 0), sequence 2 (0 1), sequence 3 (1 0), and sequence 4 (1 1). For the second mapping mode, the low power consumption signal is based on sequence modulation, and the OOK ON mode carries sequence 4. The low power consumption signal can carry information by the sequence, and the remaining part is based on OOK modulation. Only the OFDM receiver can demodulate the low power consumption signal based on the second mapping mode.

[0158] The low power consumption signal is based on OOK modulation, and the low power consumption signal is based on the first modulation. Optionally, the low power consumption signal is also based on Manchester coding.

[0159] The low-power consumption signal carries all information of the low-power consumption signal through the ON / OFF mode of OOK modulation, and in addition, the sequence carried through the OOK ON mode carries all information of the low-power consumption signal. That is, the combination of the above-mentioned mode two and the above-mentioned mode four.

[0160] According to mode two, mapping is performed once, and then according to mapping mode four, mapping is performed once. The low-power consumption signal can be demodulated by a terminal with an envelope detection receiver or an OFDM receiver.

[0161] It should be noted that the above-mentioned determination mode of the low-power consumption signal involves that, in the first modulation, the signal bit information of the low-power consumption signal based on the first modulation is mapped in the first symbol. The first modulation can be replaced by phase modulation, sequence modulation, or phase information of a signal determined using I / Q two paths, etc.

[0162] It should be noted that no matter which way the low-power consumption signal is generated, the number of OFDM symbols occupied by the low-power consumption signal may not be an integer. For example, when the LP-WUS is all based on OOK modulation (that is, generated by the above-mentioned mode one or mode two), the factors affecting the number of OFDM symbols occupied by the LP-WUS are the number of bits N of the LP-WUS and the number of bits M of an OFDM symbol divided into OOK symbols. When the LP-WUS is based on Manchester coding, that is, two OOK symbols carry 1 bit of information. Then the number of OFDM symbols occupied by N bits is 2*N / M. For example, N=3, M=4, then the LP-WUS occupies 1.5 OFDM symbols, as shown in FIG. 8. For the base station, the minimum granularity of generating the LP-WUS is an OFDM symbol, and therefore the information carried in the remaining half OFDM symbol of the last OFDM symbol is uncertain. If the information carried in the remaining half OFDM symbol is determined by the base station, it cannot be guaranteed that the energy in the last OFDM symbol is the same as the energy in other OFDM symbols, which may affect the detection result of the terminal. In addition, when the LP-WUS is generated in other ways, if the terminal does not know the scrambling sequence of the OOK symbol with signal in the last OFDM symbol, the terminal needs to locally save all candidate sequences, and use all candidate sequences to correlate with the received sequence, and determine the bit value of the last one or more bits of information through the size of the correlation value or the relative size relationship of the correlation value. The calculation amount of the terminal will increase, resulting in an increase in terminal power consumption and terminal complexity.

[0163] Based on this, the application provides a communication method to ensure that the generated LP-WUS signal has high reliability and low complexity when detected by the LP-WUR. In order to better understand the scheme of the application, two embodiments can be referred to. In the first embodiment, the number of bits of the bit information of the OFDM symbol mapped by the signal bit information of the low-power signal does not have a remainder. In the second embodiment, the OFDM symbol mapped by the signal bit information of the low-power signal has information of the padding bit. It should be noted that in actual application, it is not limited to using only these two embodiments to determine how to map the signal bit information of the low-power signal, and the application does not specifically limit it here.

[0164] It should be noted that when the following embodiment one and embodiment two are executed, the terminal can report the capability information of the terminal, wherein the capability information includes: the type of WUR supported by the terminal and the determination mode of the low-power signal supported by the terminal (understood here as the determination mode of the low-power signal demodulated by the terminal, for example, the terminal supports the low-power signal determined by mode five, etc.), and the network device or the core network device can refer to the capability information to determine the determination mode of the low-power signal. Wherein, the terminal can report the capability information of the terminal through the terminal capability report message, or the terminal can report the capability information expected by the terminal through the terminal assistance message (for example, the registration request message of the terminal).

[0165] The interaction process of the capability information between the terminal, the network device and the core network device includes the following cases:

[0166] Case 1, the terminal reports the capability information (i.e. the determination mode of the low-power signal supported by the terminal, such as mode five and mode six) to the core network device, and the core network device sends indication information A to the network device, which indicates the determination mode of the low-power signal transmitted by the network device (i.e. the actual determination mode of the low-power signal transmitted by the core network device after receiving the capability information reported by the terminal, for example, mode five). The network device sends indication information B to the terminal, which indicates the determination mode of the low-power signal transmitted by the network device (i.e. the actual determination mode of the low-power signal transmitted, for example, mode five). Wherein, the capability information reported by the terminal, the indication information A and the indication information B can be the same or different, and the application does not specifically limit it here.

[0167] Case 2, the terminal reports the capability information (i.e. the determination mode of the low-power signal supported by the terminal, such as mode five and mode six) to the network device, and the network device sends indication information C to the terminal (i.e. the actual determination mode of the low-power signal transmitted by the network device after receiving the capability information reported by the terminal, for example, mode five). Wherein, the capability information reported by the terminal and the indication information C can be the same or different, and the application does not specifically limit it here.

[0168] In a specific application, the network device (or the core network device) can indicate one or more of the determination manners of the low-power consumption signal selected by the network device (or the core network device) to the terminal. For example, the network device indicates to the terminal that the determination manner of the low-power consumption signal is manner three. Further, the network device (or the core network device) also indicates to the terminal that the bit quantity of the signal bit information of the low-power consumption signal is N, the OOK symbol quantity included in one OFDM symbol is M, and the bit quantity of the bit information mapped based on the sequence modulation in each symbol unit in the first symbol is X, so as to make the terminal clear the specific generation manner of the low-power consumption signal and improve the detection efficiency of the low-power consumption signal. It should be noted that N, M, and X can also be understood with reference to the interaction process between the terminal, the network device, and the core network device. For example, the terminal reports one or more of the values of N, M, and X supported by the terminal to the core network device, and then the core network device determines the target values of the selected N, M, and X, and sends the target values to the network device, which directly sends the target values to the terminal. Alternatively, the terminal reports one or more of the values of N, M, and X supported by the terminal to the network device, and then the network device determines the target values of the selected N, M, and X, and directly sends the target values to the terminal. This is only an example and is not specifically limited.

[0169] In an embodiment one, the bit quantity of the bit information of the OFDM symbol mapped by the signal bit information of the low-power consumption signal does not exist a remainder

[0170] The technical solutions of the present application will be described in detail below with reference to FIG. 9 and specific method embodiments. It should be noted that FIG. 9 is a schematic flowchart of the method embodiments of the present application, which shows the detailed communication steps or operations of the method, but these steps or operations are only examples, and other operations or variations of the various operations in FIG. 9 can also be performed by the embodiments of the present application. In addition, the various steps in FIG. 9 can be performed in a different order from that presented in FIG. 9, and it is possible that not all the operations in FIG. 9 are to be performed.

[0171] The method involves the communication interaction of a first communication device and a second communication device. The first communication device can be a network device, a chip, or a circuit. Optionally, the chip can be a chip of the network device. The present application does not limit this. Optionally, the circuit can be a circuit of the network device. The present application does not limit this. The second communication device can be a terminal, a chip, or a circuit. Optionally, the chip can be a chip of the terminal. The present application does not limit this. Optionally, the circuit can be a circuit of the terminal. The present application does not limit this. The following will be described taking the first communication device as a network device and the second communication device as a terminal as an example.

[0172] The method can be applied in a 4G system, such as a long term evolution (LTE) system, or can be applied in a 5G system, such as a new radio (NR) system, or can also be applied in a next-generation mobile communication system or other similar communication system, without limitation. In addition, the technical solutions provided in the embodiments of the present application can also be applied in a V2X scenario, such as an NR-V2X scenario. For example, the embodiments of the present application can be used in the fields of factory manufacturing, whole-house intelligence, intelligent driving, assisted driving, intelligent networked vehicles, or indoor commercial scenarios.

[0173] The present application does not limit the number of terminals and network devices, which are only exemplarily illustrated herein. Two terminals and one network device are exemplarily illustrated herein, and the method is executed as follows:

[0174] In step 901, the network device determines a low-power signal, the signal bit information of the low-power signal is associated with a terminal or a terminal sub-group, and the number of bits of the signal bit information is an integer multiple of the number of bits of the bit information mapped by one OFDM symbol.

[0175] It should be noted that the above step 901 is an optional step, and the low-power signal can also be pre-configured by the network device. For example, in the scenario of reporting the positions of Internet of Things devices in a factory, the identifiers of the Internet of Things devices in the factory usually change infrequently, and the network device can pre-configure a low-power signal. The signal bit information of the low-power signal can indicate to wake up multiple Internet of Things devices to transmit position information, etc. Alternatively, the network device calls a low-power signal from another device. For example, network device 1 has sent a low-power signal 1 in a historical time period, the low-power signal 1 is used to wake up the main receivers of terminal 1, terminal 3, and terminal 4, and network device 2 needs to wake up the main receivers of terminal 1, terminal 3, and terminal 4. Therefore, network device 1 can be requested to provide the low-power signal 1, and the low-power signal 1 is reused to wake up the main receivers of terminal 1, terminal 3, and terminal 4. This is only exemplarily illustrated herein, without specific limitation.

[0176] The terminal sub-group can also be understood as a terminal group.

[0177] The low-power signal can be understood with reference to the description in 1) above, which is not expanded upon herein. In addition, the low-power signal also includes CRC bit information. For example, the signal bit information of the low-power signal includes CRC bit information, or the signal bit information and the CRC bit information of the low-power signal are mapped to an OFDM symbol.

[0178] The bit quantity of the signal bit information is an integer multiple of the bit quantity of the bit information mapped by one OFDM symbol, or the bit quantity of the signal bit information mapped by the OFDM symbol is an integer.

[0179] In an optional mode, when it is determined that the mode is the above-described mode one, the bit quantity of the signal bit information of the low-power-consumption signal is N, the bit quantity of the bit information mapped by one OFDM symbol is M, and the signal bit information of the low-power-consumption signal occupies N / M OFDM symbols. Exemplarily, as shown in FIG. 10A, the low-power-consumption signal is 10101100, N is 8, M is 4, and N / M is 2.

[0180] When it is determined that the mode is the mode two or the mode five or the mode six, the bit quantity of the signal bit information of the low-power-consumption signal is N, and the signal bit information of the low-power-consumption signal occupies 2N / M OFDM symbols. Exemplarily, when the mode two is adopted, as shown in FIG. 10B, the low-power-consumption signal is 10101100, N is 8, M is 4, and 2N / M is 4.

[0181] When it is determined that the mode is the mode three, the bit quantity of the signal bit information of the low-power-consumption signal is N, the bit quantity of the bit information mapped by each symbol unit in the first symbol is X, the bit quantity of the bit information mapped by one OFDM symbol is (X+1)*M / 2, and the signal bit information of the low-power-consumption signal occupies 2N / ((X+1)*M) OFDM symbols. Exemplarily, as shown in FIG. 10C, the low-power-consumption signal is 10101100, N is 8, M is 4, X is 3, and 2N / ((X+1)*M) is 1.

[0182] When it is determined that the mode is the mode four, the bit quantity of the signal bit information of the low-power-consumption signal is N, the bit quantity of the bit information mapped by each symbol unit in the first symbol is X, the bit quantity of the bit information mapped by one OFDM symbol is X*M / 2, and the signal bit information of the low-power-consumption signal occupies 2N / (X*M) OFDM symbols. Exemplarily, as shown in FIG. 10D, the low-power-consumption signal is 10101100, N is 8, M is 2, X is 4, and 2N / (X*M) is 2.

[0183] In the embodiment one, the above-described N, M, X, N / M, 2N / M, (X+1)*M / 2, X*M / 2, 2N / ((X+1)*M), and 2N / (X*M) are positive integers, and the signal amplitude of the first symbol is not 0.

[0184] Specifically, in the following cases, it can be guaranteed that the bit quantity of the signal bit information is an integer multiple of the bit quantity of the bit information mapped by one OFDM symbol:

[0185] Case 1, when the determination mode is mode four, the value of N is 8 or 16, the value of M is 1 or 2 or 4 or 8, and the value of X is not 3.

[0186] Case 2, when the determination mode is mode three, the value of N is 8 or 16, the value of M is 1 or 2 or 4 or 8, and the value of X is not 2.

[0187] Case 3, when the determination mode is mode four, the value of N is 8 or 16, the value of M is 1 or 2 or 4, and the value of X is not 3.

[0188] Case 4, when the determination mode is mode three, the value of N is 8 or 16, the value of M is 1 or 2 or 4, and the value of X is not 2.

[0189] Case 5, when the determination mode is mode one or mode two or mode five or mode six, the value of N is an odd number, the value of M is not 4, and in addition, if 8 is included in the value set of M, the value of M is also not 8.

[0190] Exemplarily, when the signal bit information bit quantity N of the LP-WUS is any one of 1, 3, 5, 7, 9, 11, 13 or 15, the value of M is 1 or 2. Or, when the signal bit information bit quantity N of the LP-WUS is any one of 1, 3, 5, 7, 9, 11, 13 or 15, the value of M is not 4, nor 8. When the value of M is 8, the value of N is not an odd number, and the value of N is not 2, 6, 10, 14 (provided that the set of N has these values), or the value of N is 4 or 8 or 12 or 16. When the value of M is 4, the value of N is not an odd number, or the value of N is 2 or 4 or 6 or 8 or 10 or 12 or 14 or 16.

[0191] Case 6, when the determination mode is mode one or mode two or mode five or mode six, the value of M is 8, and the value of N is not an odd number, and the value of N is not 2 or 6 or 10 or 14.

[0192] Case 7, when the determination mode is mode one or mode two or mode five or mode six, the value of M is 4, and the value of N is not an odd number, and the value of N is 2 or 4 or 6 or 8 or 10 or 12 or 14 or 16.

[0193] Further, when the determination mode is mode five, the transmission times (i.e. the actual total transmission times) of the bit information corresponding to one terminal identifier or one terminal sub-group identifier associated with the low-power signal in the low-power signal is 1 or 2 or 3 or 4; or, when the determination mode is mode five, the repetition times (i.e. the actual total transmission times minus one, or the actual repetition transmission times) of the bit information corresponding to one terminal identifier or one terminal sub-group identifier associated with the low-power signal in the low-power signal is 1 or 2 or 3. It is to be noted that in mode five, only part of the signal bit information of the low-power signal based on the first modulation is repeated. For example, the sequence carried in the first symbol in FIG. 7 is repeated.

[0194] When the determination mode is mode six, the transmission times of the bit information corresponding to one terminal identifier or one terminal sub-group identifier associated with the low-power signal in the low-power signal is 1 or 2 or 3; and when the determination mode of the low-power signal is mode six, the repetition times of the bit information corresponding to one terminal identifier or one terminal sub-group identifier associated with the low-power signal in the low-power signal is 1 or 2. It is to be noted that in mode five, the signal bit information of the low-power signal based on the first modulation is repeated. Exemplarily, as shown in FIG. 10E, the low-power signal is 1010, N is 4, M is 2, X is 2, 2N / (X*M) is 2, and the repetition transmission times is 2.

[0195] It is to be noted that the first transmission of one terminal identifier or one terminal sub-group identifier associated with the low-power signal in the low-power signal can also be referred to as the first repetition transmission. The present application does not specifically limit this. The first repetition transmission of the low-power signal can also be referred to as the second transmission in the actual transmission.

[0196] Step 902, the network device sends a low-power signal. Correspondingly, the terminal 1 and the terminal 2 receive the low-power signal.

[0197] Exemplarily, the network device can send the low-power signal through broadcasting, or through groupcasting, and of course, through unicasting, which is not specifically limited herein. Broadcasting is taken as an example in FIG. 9.

[0198] Step 903A, the terminal 1 demodulates the low-power signal, and determines whether to wake up the main receiver of the terminal 1 according to the low-power signal.

[0199] Step 903B, the terminal 2 demodulates the low-power signal, and determines whether to wake up the main receiver of the terminal 2 according to the low-power signal.

[0200] Exemplarily, the signal bit information of the low-power consumption signal indicates that the terminal 1 is woken up to perform information transmission. Then, after receiving the low-power consumption signal, the terminal 1 wakes up the main receiver of the terminal 1. After receiving the low-power consumption signal, the terminal 2 does not wake up the main receiver of the terminal 2.

[0201] In the present application, the number of bits of the signal bit information of the low-power consumption signal is an integer multiple of the number of bits of the bit information mapped by one OFDM symbol, which can reduce the transmission of redundant resources, ensure the balance of the energy in the OFDM symbol, and does not increase the complexity of the terminal detecting the low-power consumption signal.

[0202] In the second implementation, the low-power consumption signal has the signal bit information mapped to the OFDM symbol with the padding bits.

[0203] The technical solutions of the present application will be described in detail below with reference to FIG. 11. It should be noted that FIG. 11 is a schematic flowchart of the method embodiment of the present application, which shows the detailed communication steps or operations of the method, but these steps or operations are only examples, and other operations or variations of the operations in FIG. 11 can also be performed by the embodiments of the present application. In addition, the steps in FIG. 11 can be performed in different order from that shown in FIG. 11, or there can be a containing relationship between the steps, and it is possible that not all the operations in FIG. 11 are performed.

[0204] The method involves the communication interaction between the first communication device and the second communication device. The first communication device can be a network device, a chip or a circuit. Optionally, the chip can be a chip of the network device. The present application does not limit this. Optionally, the circuit can be a circuit of the network device. The present application does not limit this. The second communication device can be a terminal, a chip or a circuit. Optionally, the chip can be a chip of the terminal. The present application does not limit this. Optionally, the circuit can be a circuit of the terminal. The present application does not limit this. The following will be described by taking the first communication device as a network device and the second communication device as a terminal as an example.

[0205] The method can be applied in a 4G system, such as an LTE system, or can be applied in a 5G system, such as an NR system, or can also be applied in a next-generation mobile communication system or other similar communication system, and the specific application is not limited. In addition, the technical solutions provided by the embodiments of the present application can also be applied in a V2X scenario, such as an NR-V2X scenario. For example, the embodiments of the present application can be used in the fields of factory manufacturing, whole-house intelligence, intelligent driving, assisted driving, intelligent networked vehicles, or indoor commercial scenarios.

[0206] The present application does not limit the number of terminals and network devices, which are only exemplarily described herein. Two terminals and one network device will be taken as an example to illustrate that the method is performed as follows:

[0207] At step 1101, the network device determines a low power consumption signal, the low power consumption signal comprising signal bit information and padding bit information, the signal bit information being associated with a terminal or a terminal subgroup, the signal bit information and the padding bit information being mapped to at least one OFDM symbol (wherein the at least one OFDM symbol is a positive integer number of OFDM symbols), the signal bit information being prior to the padding bit information.

[0208] In a possible implementation, the low power consumption signal comprises the signal bit information and / or the CRC bit information. The padding bit information is not included in the low power consumption signal. For example, the padding bit information is carried by a padding signal. The padding signal and the low power consumption signal are two different signals.

[0209] Hereinafter, the low power consumption signal is taken as an example for illustration, which comprises the padding bit information.

[0210] It should be noted that step 1101 is an optional step. The low power consumption signal can be understood with reference to the description in 1) above, which is not described here. In addition, the low power consumption signal further comprises the CRC bit information. For example, the CRC bit information is included in the signal bit information of the low power consumption signal, or the signal bit information, the CRC bit information and the padding bit information of the low power consumption signal are mapped to one or more OFDM symbols.

[0211] The padding bit information can also be referred to as check bit information, which is not specifically limited here. In a possible implementation, the bit value of the padding bit information can be predefined. For example, the bit value of each bit of the padding bit information is 0 or 1. For example, as shown in FIG. 12, when the determination manner of the low power consumption signal is manner four, the number of bits of the signal bit information of the low power consumption signal is N, the number of bits of the bit information mapped by each symbol unit in the first symbol is X, the number of bits of the bit information mapped by one OFDM symbol is X*M / 2, the signal bit information of the low power consumption signal occupies 2N / (X*M) OFDM symbols, the low power consumption signal is 10010110, N is 8, M is 2, X is 3, and 2N / (X*M) is about 3. The bit state of the padding bit information is 0.

[0212] If the low power consumption signal is based on OOK modulation, the determination manner of the low power consumption signal is manner one or manner two, the number of bits N of the signal bit information of the low power consumption signal is any one of 1, 3, 5, 7, 9, 11, 13 or 15, and M is 4, the signal bit information occupies a non-integer number of OFDM symbols, which are 0.5, 1.5, 2.5, 3.5, 4.5, 5.5, 6.5 and 7.5 OFDM symbols respectively. The bit value of each bit of the signal bit information in the last half OFDM symbol is the same as that of each bit of the padding bit information.

[0213] In this way, the terminal only needs to perform correlation value processing on the last OFDM symbol with a locally stored sequence and the received low-power consumption signal, which can reduce the complexity of the terminal algorithm. For the network device, the network device can generate the low-power consumption signal according to the low-power consumption signal generation manner specified by the protocol, and when the signal bit information of the low-power consumption signal cannot occupy a complete OFDM symbol, the fixed bit value is used to fill the bit information, which has lower complexity.

[0214] In another possible implementation, the network device sends indication information, and the indication information indicates the bit value of the padding bit information. The bit value of the padding bit information can be associated with the bit value of the signal bit information of the low-power consumption signal, for example, is the same as the bit value of the partial signal bit information of the low-power consumption signal. By indicating the bit value of the padding bit information through the first communication device, this way is more flexible, and at the same time, the network can adjust the bit value of the padding bit information to ensure the orthogonality of the signal bit information between different terminals, improve the detection performance, in combination with the wake-up indication of other terminals. In addition, when the bit value of the padding bit information is associated with the bit value of the signal bit information of the low-power consumption signal, the transmission performance of the signal bit information of the low-power consumption signal can be improved, and the coverage performance of the low-power consumption signal can be improved.

[0215] In an optional manner, the number of bits of the padding bit information is K, the number of bits of the signal bit information is N1+N2, the number of at least one OFDM symbol is L, the first N1 bits of the signal bit information in the signal bit information are mapped to the first L-1 OFDM symbols, the last N2 bits of the signal bit information in the signal bit information and the K bits of the padding bit information are mapped to the Lth OFDM symbol, the bit value of the K bits is associated with the signal bit information mapped by the T1th OFDM symbol, and the last N2 bits of the signal bit information in the signal bit information are before the K bits of the padding bit information, wherein K, L, N1, N2, and L-1 are positive integers, and T1 is a positive integer less than L. As shown in FIG. 13A, the signal bit information of the low-power consumption signal is 10010110, K is 1, N1+N2 is 6+2, L is 3, N1 is 6, N2 is 2, and T1 is assumed to be 1. The bit value of the K bits can be the same as the bit value of the specific bit information in the signal bit information mapped by the first OFDM symbol. For example, the bit value of the K bits can be the same as the bit value of the first bit in the signal bit information mapped by the first OFDM symbol.

[0216] To better enhance the transmission performance of the signal bit information, the signal bit information mapped by the T1th OFDM symbol includes a first bit and a second bit, the second bit being before the first bit; the bit values of the K bits are associated with the signal bit information mapped by the T1th OFDM symbol, including: the bit values of the K bits are the same as the bit value of the first bit, and K is the same as the number of bits corresponding to the first bit. As shown in FIG. 13B, the low-power-consumption signal is 10010110, K is 1, N1+N2 is 6+2, L is 3, N1 is 6, N2 is 2, and T1 is assumed to be 1. The bit values of the K bits can be the same as the bit value of the second bit in the bit information mapped by the first OFDM symbol.

[0217] Specifically, the bit values of the N2 bits are the same as the bit value of the second bit, the number of bits corresponding to the N2 bits is the same as the number of bits corresponding to the second bit, and the bit values of the K bits are the same as the bit value of the first bit. As shown in FIG. 14A, the low-power-consumption signal is 10010110, K is 1, N1+N2 is 6+2, L is 3, N1 is 5, N2 is 2, the N2 bits mapped by the third OFDM symbol are the same as the bit value of the second bit in the bit information mapped by the second OFDM symbol, both being 10, and the bit values of the K bits are 1, which are the same as the bit value of the first bit in the bit information mapped by the second OFDM symbol. This mode is similar to sending the same sequence twice, can reduce the performance impact caused by channel fading, improve the coverage performance of the low-power-consumption signal, and reduce the false rejection rate or false alarm rate of the low-power-consumption signal.

[0218] Specifically, the N2 bits are based on OOK modulation, the first bit is based on a first modulation, and the bit values of the K bits are the same as the bit value of the first bit, that is, the low-power-consumption signal is generated by using the third mode, the fifth mode or the sixth mode. As shown in FIG. 14B, the low-power-consumption signal is 1001011011101010, K is 0, N1+N2 is 15+1, L is 6, N1 is 15, and N2 is 1. The N2 bits mapped by the sixth OFDM symbol are based on OOK modulation, T1 can be any one of the first OFDM symbol to the fifth OFDM symbol, and in FIG. 14B, T1 is taken as an example to illustrate that K is 3. The bit values of the K bits are 01. This mode is similar to sending the same sequence twice, can reduce the performance impact caused by channel fading, improve the coverage performance of the low-power-consumption signal, and reduce the false rejection rate or false alarm rate of the low-power-consumption signal.

[0219] Step 1102, the network device sends a low-power-consumption signal. Correspondingly, terminal 1 and terminal 2 receive the low-power-consumption signal.

[0220] Exemplarily, the network device can send the low-power consumption signal through broadcasting, or through multicasting, and of course, through unicasting, which is not specifically limited herein. Fig. 11 takes broadcasting as an example for illustration.

[0221] In step 1103A, the terminal 1 demodulates the low-power consumption signal, and determines whether to wake up the main receiver of the terminal 1 according to the low-power consumption signal.

[0222] In step 1103B, the terminal 2 demodulates the low-power consumption signal, and determines whether to wake up the main receiver of the terminal 2 according to the low-power consumption signal.

[0223] Exemplarily, the signal bit information of the low-power consumption signal indicates that the terminal 1 is woken up for information transmission. Then, after receiving the low-power consumption signal, the terminal 1 wakes up the main receiver of the terminal 1. After receiving the low-power consumption signal, the terminal 2 does not wake up the main receiver of the terminal 2.

[0224] In the present application, the signal bit information and the padding bit information are mapped to at least one OFDM symbol, which can ensure the balance of the energy in the OFDM symbol, and does not increase the complexity of the terminal detecting the low-power consumption signal.

[0225] It should be noted that, if there is no padding bit information, the low-power consumption signal is generated by the first embodiment, and if there is padding bit information, the low-power consumption signal is generated by the second embodiment. How to generate the low-power consumption signal is not specifically limited herein, and can be flexibly selected based on specific applications.

[0226] The above describes the scheme provided by the embodiments of the present application mainly from the perspective of device interaction. It can be understood that, in order to realize the above functions, each device can include a corresponding hardware structure and / or software module for executing each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the embodiments of the present application can be realized in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0227] The embodiments of the present application can divide the functional units of the device according to the above method examples, for example, each functional unit can be divided according to each function, or two or more functions can be integrated in one unit. The above integrated unit can be realized in the form of hardware or software functional unit.

[0228] In the case of employing the integrated unit, FIG. 15 shows a possible exemplary block diagram of the communication apparatus involved in the embodiments of the present application. As shown in FIG. 15, the communication apparatus 1500 can include a processing unit 1501 and a transceiver unit 1502. The processing unit 1501 is configured to control and manage the actions of the communication apparatus 1500. The transceiver unit 1502 is configured to support the communication of the communication apparatus 1500 with other devices. Optionally, the transceiver unit 1502 can include a receiving unit and / or a transmitting unit, which are configured to perform the receiving and transmitting operations, respectively. Optionally, the communication apparatus 1500 can further include a storage unit configured to store the program codes and / or data of the communication apparatus 1500. The transceiver unit can be referred to as an input / output unit, a communication unit, etc., and can be a transceiver; the processing unit can be a processor. When the communication apparatus is a module (e.g., a chip) in a communication device, the transceiver unit can be an input / output interface, an input / output circuit or an input / output pin, etc., and can also be referred to as an interface, a communication interface or an interface circuit, etc.; the processing unit can be a processor, a processing circuit or a logic circuit, etc. Specifically, the communication apparatus can be the terminal, the network device, etc. mentioned above.

[0229] In addition, as shown in FIG. 16, a simplified structure diagram of a terminal is provided in the present application. For the purpose of understanding and illustration, in FIG. 16, the terminal is taken as an example of a mobile phone. As shown in FIG. 16, the terminal includes a processor, a memory, a radio frequency circuit, an antenna and an input / output device.

[0230] The processor is mainly configured to process the communication protocol and the communication data, control the terminal, execute the software program, process the data of the software program, etc.

[0231] The memory is mainly configured to store the software program and the data.

[0232] The radio frequency circuit is mainly configured to convert the baseband signal and the radio frequency signal and process the radio frequency signal.

[0233] The antenna is mainly configured to transceive the radio frequency signal in the form of electromagnetic wave.

[0234] The input / output device, such as a touch screen, a display screen, a keyboard, etc., is mainly configured to receive the data input by the user and output the data to the user.

[0235] It should be noted that some kinds of terminals can not have the input / output device.

[0236] When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs a baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal, and sends a radio frequency signal in the form of an electromagnetic wave through an antenna. When data is sent to the terminal, the radio frequency circuit receives a radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data.

[0237] For ease of illustration, only one memory and one processor are shown in FIG. 16. In actual terminal products, there can be one or more processors and one or more memories. The memory can also be referred to as a storage medium or a storage device, etc. The memory can be independent of the processor or integrated with the processor, and the embodiments of the present application do not limit this.

[0238] In the embodiments of the present application, the antenna and the radio frequency circuit with transceiving functions can be regarded as a transceiving unit of the terminal, and the processor with processing functions can be regarded as a processing unit of the terminal.

[0239] As shown in FIG. 16, the terminal 1600 includes a transceiving unit 1610 and a processing unit 1620. The transceiving unit 1610 can also be referred to as a transceiver, a transceiver, a transceiver, etc. The processing unit 1620 can also be referred to as a processor, a processing board, a processing module, a processing device, etc.

[0240] Optionally, the devices for implementing the receiving function in the transceiving unit 1610 can be regarded as a receiving unit, and the devices for implementing the sending function in the transceiving unit 1610 can be regarded as a sending unit, that is, the transceiving unit 1610 includes a receiving unit and a sending unit. The transceiving unit can also be referred to as a transceiver, a transceiver, or a transceiver circuit, etc. The receiving unit can also be referred to as a receiver, a receiver, or a receiving circuit, etc. The sending unit can also be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0241] It should be understood that the transceiving unit 1610 is used to perform the sending operation and the receiving operation of the terminal in the above-mentioned method embodiments, and the processing unit 1620 is used to perform other operations of the terminal in addition to the transceiving operation in the above-mentioned method embodiments.

[0242] When the terminal is a chip, the chip includes a transceiving unit and a processing unit (processor). The transceiving unit can be an input / output circuit or a communication interface, for example, an IO interface; the processing unit is a processor or a microprocessor integrated on the chip or an integrated circuit or a logic circuit. The transceiving unit, the processing unit, and the memory can be integrated in a first chip, for example, a modem, a system-on-chip SoC. The radio frequency circuit can be located in a second chip, for example, a radio frequency front-end (Front-End).

[0243] The application also provides a network device. As shown in FIG. 17, a structural schematic diagram of a network device 1700 provided by an embodiment of the application is shown. The network device 1700 can be applied to the system shown in FIG. 1, for example, the network device 1700 can be a network device in the system shown in FIG. 1, to perform the functions of the network device in the above-mentioned method embodiments. It should be understood that the following is only an example, and in future communication systems, the network device can have other forms and structures.

[0244] For example, in a 5G communication system, the network device 1700 can include a CU, a DU and an AAU. Compared with the network device in the LTE communication system, which is composed of one or more radio frequency units such as a remote radio unit (RRU) and one or more building base band units (BBU), the network device in the 5G communication system is composed of a CU, a DU and an AAU.

[0245] The non-real-time part of the original BBU is split out and redefined as a CU, responsible for processing non-real-time protocols and services, part of the physical layer processing function of the BBU is combined with the original RRU and passive antenna into an AAU, and the remaining function of the BBU is redefined as a DU, responsible for processing physical layer protocols and real-time services. In short, the CU and the DU are distinguished by the real-time nature of the processed content, and the AAU is a combination of the RRU and the antenna.

[0246] The CU, the DU and the AAU can be in a separate or combined form, so there are many network deployment forms. One possible deployment form is shown in FIG. 17, which is consistent with the traditional 4G network device, and the CU and the DU are deployed in the same hardware. It should be understood that FIG. 17 is only an example and does not limit the scope of protection of the application. For example, the deployment form can also be that the DU is deployed in the BBU room, the CU is centrally deployed or the DU is centrally deployed, and the CU is more centrally deployed.

[0247] The AAU 1800 can implement the transceiving function and correspond to the transceiving unit 1502 in FIG. 15. Optionally, the AAU 800 can also be referred to as a transceiver, a transceiving circuit or a transceiver, etc., which can include at least one antenna 1801 and a radio frequency unit 1802. Optionally, the AAU 1800 can include a receiving unit and a sending unit, the receiving unit can correspond to a receiver (or receiver, receiving circuit), and the sending unit can correspond to a transmitter (or transmitter, transmitting circuit). The CU and the DU 1900 can implement the internal processing function and correspond to the processing unit 1501 in FIG. 15. Optionally, the CU and the DU 1900 can control the network device, etc., and can be referred to as a controller. The AAU, the CU and the DU can be physically arranged together or physically separated.

[0248] In addition, the network device is not limited to the form shown in FIG. 17, and can also be other forms: for example, including a BBU and an adaptive radio unit (ARU), or including a BBU and an AAU; can also be customer premises equipment (CPE), and can also be other forms, which are not limited by the present application.

[0249] In one example, the CU and the DU 1900 can be composed of one or more single boards, and the multiple single boards can jointly support a wireless access network of a single access system (such as an LTE network), or can separately support wireless access networks of different access systems (such as an LTE network, a 5G network, a future network, or other networks). The CU and the DU 1900 further include a memory 1901 and a processor 1902. The memory 1901 is used to store necessary instructions and data. The processor 1902 is used to control the network device to perform necessary actions, for example, to control the network device to perform the operation processes of the network device in the above method embodiments. The memory 1901 and the processor 1902 can serve one or more single boards. That is, a memory and a processor can be separately arranged on each single board. Alternatively, multiple single boards can share the same memory and processor. In addition, necessary circuits can also be arranged on each single board.

[0250] It should be understood that the network device 1700 shown in FIG. 17 can implement the network device functions involved in the method embodiments of FIG. 9 or FIG. 11. The operations and / or functions of each unit in the network device 1700 are respectively used to implement the corresponding processes performed by the network device in the method embodiments of the present application. To avoid repetition, the detailed description is appropriately omitted here. The structure of the network device shown in the example of FIG. 17 is only one possible form, and should not constitute any limitation on the embodiments of the present application. The present application does not exclude the possibility of other forms of network device structures that can appear in the future.

[0251] The above CU and DU 1900 can be used to perform the actions implemented internally by the network device described in the preceding method embodiments, and the AAU 1800 can be used to perform the actions of sending or receiving by the network device to or from the terminal described in the preceding method embodiments. For details, see the description in the preceding method embodiments, which will not be described here.

[0252] The embodiments of the present application also provide a communication system including a terminal and a network device. The terminal is used to perform all or part of the steps performed by the terminal in the embodiments shown in FIG. 9 or FIG. 11. The network device is used to perform all or part of the steps performed by the network device in the embodiments shown in FIG. 9 or FIG. 11.

[0253] Based on the above embodiments, the embodiments of the present application further provide a computer readable storage medium storing instructions, when the instructions are executed, causing the method in any of the above embodiments to be implemented. The computer storage medium can be a volatile storage medium or a non-volatile storage medium, and the readable storage medium can include a U disk, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk, and various storage media that can store program codes.

[0254] Those skilled in the art will appreciate that embodiments of the present application can be provided as methods, systems, or computer program products. Accordingly, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, compact disc read-only memory (CD-ROM), optical storage, and the like) containing computer usable program code.

[0255] The present application is described with reference to the flowcharts and / or block diagrams of the methods, apparatus (systems), and computer program products according to the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as combinations of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing apparatus to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing apparatus produce the apparatus for implementing the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0256] These computer program instructions can also be stored in a computer readable memory that can direct the computer or other programmable data processing apparatus to work in a specific manner, so that the instructions stored in the computer readable memory produce a manufactured product including instruction apparatus, which implements the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0257] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, so that a series of operation steps are performed on the computer or other programmable data processing apparatus to produce a computer implemented process, so that the instructions executed on the computer or other programmable data processing apparatus provide steps for implementing the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

Claims

1. A communication method characterized by comprising: Comprising: transmitting a low-power signal, signal bit information of the low-power signal being associated with a terminal or a terminal sub-group, a bit number of the signal bit information being an integer multiple of a bit number of bit information mapped in one orthogonal frequency division multiplexing (OFDM) symbol.

2. A communication method characterized by comprising: Comprising: receiving a low-power signal, signal bit information of the low-power signal being associated with a terminal or a terminal sub-group, a bit number of the signal bit information being an integer multiple of a bit number of bit information mapped in one orthogonal frequency division multiplexing (OFDM) symbol.

3. The method according to claim 1 or 2, characterized in that, The signal bit information associated with a terminal or a terminal sub-group comprises one or more of the following: The signal bit information is used to determine one or more terminal identities; The signal bit information is used to determine one or more terminal sub-group identities; The signal bit information is used to indicate whether to wake up one or more terminals for information transmission; The signal bit information is used to indicate whether to wake up terminals within one or more terminal sub-groups for information transmission.

4. The method of claim 3, wherein, The information transmission comprises one or more of the following: monitoring a physical downlink control channel (PDCCH), transmitting physical uplink control information (UCI), transmitting a physical uplink control channel (PUCCH), transmitting a physical uplink data channel (PUSCH), receiving a physical downlink shared channel (PDSCH), receiving a synchronization signal block (SSB), receiving a channel state information reference signal (CSI-RS), or receiving a tracking reference signal (TRS).

5. The method according to any one of claims 1 to 4, characterized in that, The determination manner of the low-power signal comprises one of the following: Manner one, the low-power signal is based on on-off keying (OOK) modulation; Manner two, the low-power signal is based on OOK modulation and Manchester coding; Manner three, first bit information of the low-power signal is based on OOK modulation, and a modulation manner of second bit information of the low-power signal is only based on a first modulation; Manner four, a modulation manner of the low-power signal is only based on the first modulation; Manner five, first bit information of the low-power signal is based on OOK modulation, second bit information of the low-power signal is based on OOK modulation, and the second bit information of the low-power signal is based on the first modulation; Manner six, the low-power signal is based on OOK modulation, and the low-power signal is based on the first modulation; The first modulation does not include OOK modulation; the signal bit information of the low-power signal comprises the first bit information and the second bit information.

6. The method of claim 5, wherein, The low-power signal in at least one of the manner three, the manner four, the manner five, and the manner six is further based on Manchester coding.

7. The method according to claim 5 or 6, characterized in that, The first modulation represents different bit states of the signal bit information of the low-power signal by different sequences, or the first modulation represents different bit states of the signal bit information of the low-power signal by different phases, or the first modulation represents different bit states of the signal bit information of the low-power signal by different cyclic shifts of the same sequence.

8. The method according to any one of claims 5-7, characterized in that, The signal bit information of the low-power signal based on the first modulation is mapped in a first symbol, and a signal amplitude of the first symbol is not 0.

9. The method according to any one of claims 5-8, characterized in that, The determining manner is the first manner, the bit quantity of the signal bit information of the low-power consumption signal is N, the bit quantity of the bit information mapped by the one OFDM symbol is M, and the signal bit information of the low-power consumption signal occupies N / M OFDM symbols; or, The determining manner is the second manner or the fifth manner or the sixth manner, the bit quantity of the signal bit information of the low-power consumption signal is N, and the signal bit information of the low-power consumption signal occupies 2N / M OFDM symbols; or, The determining manner is the third manner, the bit quantity of the signal bit information of the low-power consumption signal is N, the bit quantity of the bit information mapped by each symbol unit in the first symbol is X, the bit quantity of the bit information mapped by the one OFDM symbol is (X+1)*M / 2, and the signal bit information of the low-power consumption signal occupies 2N / ((X+1)*M) OFDM symbols; or, The determining manner is the fourth manner, the bit quantity of the signal bit information of the low-power consumption signal is N, the bit quantity of the bit information mapped by each symbol unit in the first symbol is X, the bit quantity of the bit information mapped by the one OFDM symbol is X*M / 2, and the signal bit information of the low-power consumption signal occupies 2N / (X*M) OFDM symbols. The N, M, X, N / M, 2N / M, (X+1)*M / 2, X*M / 2, 2N / ((X+1)*M) and 2N / (X*M) are positive integers, and the signal amplitude of the first symbol is not 0.

10. The method of claim 9, wherein, When the determining manner is the fourth manner, the value of the N is 8 or 16, the value of the M is 1 or 2 or 4 or 8, and the value of the X is not 3; or, When the determining manner is the third manner, the value of the N is 8 or 16, the value of the M is 1 or 2 or 4 or 8, and the value of the X is not 2; or When the determining manner is the fourth manner, the value of the N is 8 or 16, the value of the M is 1 or 2 or 4, and the value of the X is not 3; or, When the determining manner is the third manner, the value of the N is 8 or 16, the value of the M is 1 or 2 or 4, and the value of the X is not 2; or, When the determining manner is the first manner or the second manner or the fifth manner or the sixth manner, the value of the N is an odd number, and the value of the M is not 4; or, When the determining manner is the first manner or the second manner or the fifth manner or the sixth manner, the value of the M is 8, the value of the N is not an odd number, and the value of the N is not 2 or 6 or 10 or 14; or, When the determining manner is the first manner or the second manner or the fifth manner or the sixth manner, the value of the M is 4, the value of the N is not an odd number, and the value of the N is 2 or 4 or 6 or 8 or 10 or 12 or 14 or 16.

11. The method according to any one of claims 5-9, characterized in that, When the determining manner is the fifth manner, the value of the transmission times of the corresponding bit information of one terminal identifier or one terminal sub-group identifier associated with the low-power consumption signal in the low-power consumption signal is 1 or 2 or 3 or 4; or, The determination manner is the manner five, the repetition number of the bit information corresponding to one terminal identifier or one terminal sub-group identifier associated with the low-power consumption signal in the low-power consumption signal is 1 or 2 or 3. The determination manner is the manner six, the transmission number of the bit information corresponding to one terminal identifier or one terminal sub-group identifier associated with the low-power consumption signal in the low-power consumption signal is 1 or 2 or 3. The determination manner of the low-power consumption signal is the manner six, the repetition number of the bit information corresponding to one terminal identifier or one terminal sub-group identifier associated with the low-power consumption signal in the low-power consumption signal is 1 or 2.

12. The method of any one of claims 1-11, wherein, The low-power consumption signal comprises cyclic redundancy check (CRC) bit information.

13. A method of communication, comprising: Comprise: Transmit a low-power consumption signal, the low-power consumption signal comprises signal bit information and padding bit information, the signal bit information is associated with a terminal or a terminal sub-group, the signal bit information and the padding bit information are mapped to at least one orthogonal frequency division multiplexing (OFDM) symbol, and the signal bit information is before the padding bit information.

14. A communication method, comprising: Comprise: Receive a low-power consumption signal, the low-power consumption signal comprises signal bit information and padding bit information, the signal bit information is associated with a terminal or a terminal sub-group, the signal bit information and the padding bit information are mapped to at least one orthogonal frequency division multiplexing (OFDM) symbol, and the signal bit information is before the padding bit information.

15. The method according to claim 13 or 14, characterized in that, The signal bit information is associated with a terminal or a terminal sub-group, comprising one or more of the following: The signal bit information is used to determine one or more terminal identifiers; The signal bit information is used to determine one or more terminal sub-group identifiers; The signal bit information is used to indicate whether to wake up one or more terminals for information transmission; The signal bit information is used to indicate whether to wake up a terminal in one or more terminal sub-groups for information transmission.

16. The method of claim 15, wherein, The information transmission comprises one or more of the following manners: Monitoring a physical downlink control channel (PDCCH), transmitting physical uplink control information (UCI), transmitting a physical uplink control channel (PUCCH), transmitting a physical uplink shared channel (PUSCH), receiving a physical downlink shared channel (PDSCH), receiving a synchronization signal block (SSB), receiving a channel state information reference signal (CSI-RS), or receiving a tracking reference signal (TRS).

17. The method of any one of claims 13-16, wherein, The bit value of the padding bit information is predefined.

18. The method of claim 13, wherein, The method further comprises: Transmitting indication information, the indication information indicating the bit value of the padding bit information.

19. The method of any one of claims 14-18, wherein, The bit value of each bit of the padding bit information is 1 or 0.

20. The method of any one of claims 14-18, wherein, The bit value of the padding bit information is associated with the bit value of the signal bit information of the low-power consumption signal. The bit value of the padding bit information is associated with the bit value of the signal bit information of the low-power consumption signal.

21. The method of claim 20, wherein, The bit quantity of the padding bit information is K, the bit quantity of the signal bit information is N1+N2, the quantity of the at least one OFDM symbol is L, the signal bit information of the first N1 bits in the signal bit information is mapped to the first L-1 OFDM symbols, the signal bit information of the last N2 bits in the signal bit information and the K bits of the padding bit information are mapped to the Lth OFDM symbol, the bit values of the K bits are associated with the bit information mapped by the T1th OFDM symbol, and the signal bit information of the last N2 bits in the signal bit information is before the K bits of the padding bit information, wherein the K, the L, the N1, the N2 and the L-1 are positive integers, and the T1 is a positive integer less than L.

22. The method of claim 21, wherein, The bit information mapped by the T1th OFDM symbol includes a first bit and a second bit, the second bit is before the first bit, and the bit values of the K bits being associated with the bit information mapped by the T1th OFDM symbol include: The bit values of the K bits are the same as the bit values of the first bit, and the K is the same as the bit quantity corresponding to the first bit.

23. The method of claim 22, wherein, The bit values of the N2 bits are the same as the bit values of the second bit, and the bit quantity corresponding to the N2 bits is the same as the bit quantity corresponding to the second bit; or, The bit information corresponding to the N2 bits is based on OOK modulation, the first bit is based on a first modulation, and the first modulation does not include OOK modulation.

24. The method of claim 23, wherein, The first modulation represents different bit states of the signal bit information of the low-power-consumption signal by different sequences, or the first modulation represents different bit states of the signal bit information of the low-power-consumption signal by different phases, or the first modulation represents different bit states of the signal bit information of the low-power-consumption signal by different cyclic shifts of the same sequence.

25. The method of any one of claims 13-24, wherein, The low-power-consumption signal further includes cyclic redundancy check (CRC) bit information.

26. A communications device, characterized by The method comprises: at least one processor; running part or all of the computer program or data to cause the method of any one of claims 1-25 to be performed.

27. A computer readable storage medium, characterized in that, The computer readable storage medium stores instructions which, when executed by a computer, cause the method of any one of claims 1-25 to be performed.

28. A computer program product comprising computer programs or instructions, characterized in that, The computer program or instructions, when executed on a computer, cause the method of any one of claims 1-25 to be performed.

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