A communication method and apparatus

Abstract

The application provides a communication method and device, and relates to the technical field of communication. In the application, the number of time units occupied by a low-power signal based on coding and on-off keying (OOK) modulation is an integer multiple of the number of time units occupied by non-OOK modulation, which can reduce the transmission of redundant resources, ensure the balance of energy in an orthogonal frequency division multiplexing (OFDM) symbol, and does not increase the complexity of detecting the low-power signal by a terminal, and adapts to the needs of terminals supporting different types of receivers.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a communication method and apparatus. Background Technology

[0002] To reduce the power consumption of the terminal, a low-power wake-up signal (LP-WUS) is introduced. When the terminal detects the LP-WUS signal, it wakes up the main receiver (MR) (or main circuit or main module) that is turned off (or in a sleep state).

[0003] LP-WUS signals can be generated based on on-off keying (OOK) modulation, and / or, the signal-containing portion can be generated based on sequence. If the LP-WUS signal is generated based on both OOK modulation and sequence generation, then the terminal, regardless of whether it has an envelope detection receiver or a correlation detection receiver, can demodulate the information carried in the LP-WUS signal. However, the specific methods for generating LP-WUS signals based on these two approaches while ensuring the reliability and low complexity of LP-WUS detection are not explained in the relevant technologies. Summary of the Invention

[0004] This application provides a communication method and apparatus to ensure that there are no symbols without information when using OOK modulation and sequence modulation, thereby ensuring high resource utilization, reliable LP-WUR detection, and low complexity.

[0005] Firstly, this application provides a communication method, which can be executed by a first communication device, which can be a network device, a chip, or a circuit. This method can be applied to 5th generation (5G) communication systems or communication systems above 5G. This method can also be applied to non-terrestrial communication systems, etc. Optionally, the chip can be a chip in a network device. This application does not limit this. Optionally, the circuit can be a circuit in a network device. This application does not limit this. The method is executed as follows:

[0006] A low-power signal is transmitted, which includes a first bit of information and R1 bits of second information. The number of time units occupied by the first bit of information is an integer multiple of the number of time units occupied by the second bit of information, and R1 is a positive integer.

[0007] Secondly, this application provides a communication method, which can be executed by a second communication device, which can be a network device, a chip, or a circuit. This method can be applied to 5G communication systems or communication systems above 5G. It can also be applied to non-terrestrial communication systems, etc. Optionally, the chip can be a chip in a terminal device. This application does not limit this. Optionally, the circuit can be a circuit in a terminal device. This application does not limit this. The method is executed as follows:

[0008] The low-power signal is monitored. The low-power signal includes a first bit of information and R1 bits of second information. The number of time units occupied by the first bit of information is an integer multiple of the number of time units occupied by the second bit of information, and R1 is a positive integer.

[0009] In this application, the number of time units occupied by low-power signals based on coding and OOK modulation is an integer multiple of the number of time units occupied by non-OOK modulation. This can reduce the transmission of redundant resources, ensure the energy balance within OFDM symbols, and not increase the complexity of terminal detection of low-power signals, thus adapting to the needs of terminals that support different types of receivers.

[0010] In one alternative approach, combining the first or second aspect, the first bit information is based on on-off keyed OOK modulation, and the second bit information is based on non-OOK modulation.

[0011] Based on this, the low-power signal sent by the first communication device can be demodulated whether it is detected by a terminal that supports envelope detection receiver or a terminal that supports OFDM receiver, thus adapting to the needs of terminals that support different types of receivers, and the network only needs to generate one signal.

[0012] In conjunction with the first or second aspect, in one alternative manner, non-OOK modulation includes one or more of the following: representing different bit states of the second bit information by different sequences, representing different bit states of the second bit information by different phases, representing different bit states of the second bit information by different cyclic shifts of the same sequence, or representing different bit states of the second bit information by different root sequences.

[0013] In this way, more information can be carried through sequences or phases. Compared with OOK modulation, when transmitting the same bit information, low-power signals occupy less resources based on non-OOK modulation, reducing network resource overhead. Furthermore, there are better autocorrelation and cross-correlation between different phases or sequences, which can improve the detection performance of the terminal and enhance the coverage performance of low-power signals.

[0014] In one alternative approach, in conjunction with either the first or second aspect, the first bit information is used to determine the terminal identifier or the terminal subgroup identifier, and the second bit information is used to determine the terminal identifier or the terminal subgroup identifier.

[0015] Based on this, after the terminal demodulates the bit information of the low-power signal, it can clearly determine what operation to perform, and different operations will bring different false alarm rates, false detection rates and resource utilization rates, thus achieving greater flexibility.

[0016] In combination with the first or second aspect, in one alternative approach, the second bit information also includes padding bit information.

[0017] Based on this, the terminal can clearly identify all the bits of the second bit information and can choose to use only a locally stored sequence to perform correlation calculations with the received signal, which reduces computational complexity and saves terminal power consumption.

[0018] In combination with the first or second aspect, in one alternative approach, the number of time units occupied by the first bit of information is N, or or The number of time units occupied by the second bit of information is N is the number of bits of the first bit of information, M is the number of OOK symbols included in an orthogonal frequency division multiplexing (OFDM) symbol, L is the number of candidate sequences, and X is the number of bits of the second bit of information, where N, M, L, and X are positive integers.

[0019] Based on this, the number of time units occupied by low-power signals based on encoding and OOK modulation is an integer multiple of the number of time units occupied by non-OOK modulation. This can reduce the transmission of redundant resources, ensure the energy balance within OFDM symbols, and not increase the complexity of terminal detection of low-power signals.

[0020] In combination with the first or second aspect, in one alternative approach, the second bit information also includes a third bit information and a fourth bit information, wherein the third bit information is identical to the fourth bit information for log2L-[X1 modlog2L] bits, and the fourth bit information indicates the terminal identifier or the terminal subgroup identifier, where L is the number of candidate sequences and X1 is the number of bits in the fourth bit information.

[0021] Based on this, the third bit information can be determined through the fourth bit information. After the terminal demodulates the bit information of the low-power signal, it can clearly determine what operation to perform. Different operations will bring different false alarm rates, false detection rates and resource utilization rates, thus achieving greater flexibility.

[0022] Thirdly, this application provides a communication method, which can be executed by a first communication device, which can be a network device, a chip, or a circuit. This method can be applied to 5G communication systems or communication systems above 5G. This method can also be applied to non-terrestrial communication systems, etc. Optionally, the chip can be a chip in a network device. This application does not limit this. Optionally, the circuit can be a circuit in a network device. This application does not limit this. The method is executed as follows:

[0023] Send a low-power signal, which includes a fifth bit of information, R sixth bits of information, and a seventh bit of information. The seventh bit of information is related to the sixth bit of information, or the seventh bit of information is a padding bit. The number of time units occupied by the fifth bit of information is the same as the number of time units occupied by the R sixth bits of information and the seventh bit of information, where R is a positive integer.

[0024] Fourthly, this application provides a communication method, which can be executed by a second communication device, which can be a network device, a chip, or a circuit. This method can be applied to 5G communication systems or communication systems above 5G. It can also be applied to non-terrestrial communication systems, etc. Optionally, the chip can be a chip in a terminal device. This application does not limit this. Optionally, the circuit can be a circuit in a terminal device. This application does not limit this. The method is executed as follows:

[0025] Monitor low-power signals, which include a fifth bit of information, R sixth bits of information, and a seventh bit of information. The seventh bit of information is related to the sixth bit of information, or it is a padding bit. The number of time units occupied by the fifth bit of information is the same as the number of time units occupied by the R sixth bits of information and the seventh bit of information, where R is a positive integer.

[0026] Based on this, the transmission of redundant resources can be reduced, the energy balance within OFDM symbols can be guaranteed, and the complexity of terminal detection of low-power signals can be increased without increasing the complexity of terminal detection, thus adapting to the needs of terminals that support different types of receivers.

[0027] In conjunction with the third or fourth aspect, in one alternative approach, the fifth bit is used to determine the terminal identifier or the terminal subgroup identifier, and the sixth bit is used to determine the terminal identifier or the terminal subgroup identifier.

[0028] Based on this, after the terminal demodulates the bit information of the low-power signal, it can clearly determine what operation to perform, and different operations will bring different false alarm rates, false detection rates and resource utilization rates, thus achieving greater flexibility.

[0029] In one alternative approach, combining the third or fourth aspect, the seventh bit of information differs from the sixth bit of information.

[0030] Based on this, by supporting a shorter seventh bit than the sixth bit, the bit information of redundant resources, namely the seventh bit, can be clearly identified, which is beneficial for terminal demodulation, reduces terminal complexity, and lowers terminal power consumption.

[0031] In conjunction with the third or fourth aspect, in one alternative approach, the seventh bit information is related to the sixth bit information, including: the seventh bit information and the sixth bit information have P bits that are the same, where P is the number of bits in the seventh bit information.

[0032] Based on this, the bit information of the seventh bit information is determined by the bit information of the sixth bit information. After the terminal demodulates the bit information of the low-power signal, it can clearly determine what operation to perform. Different operations will result in different false alarm rates, false detection rates, and resource utilization rates, thus achieving greater flexibility.

[0033] In conjunction with the third or fourth aspect, in one alternative approach, the bit state for filling bit information is 0 or 1.

[0034] In conjunction with the third or fourth aspect, in one alternative manner, the first communication device sends a first indication message, which is used to determine the bit state of the filling bit information.

[0035] The method of indicating the bit value of the filling bit information through the first communication device is more flexible. At the same time, the network can combine the wake-up indication of other terminals and adjust the bit value of the filling bit information to ensure the orthogonality of the signal bit information between different terminals and improve the detection performance.

[0036] In conjunction with the third or fourth aspect, in one alternative approach, the sixth bit information includes the eighth bit information and the ninth bit information, wherein the eighth bit information and the ninth bit information are identical for log2L-[X2 modlog2L] bits, and the ninth bit information indicates the terminal identifier or the terminal subgroup identifier, where L is the number of candidate sequences and X2 is the number of bits in the ninth bit information.

[0037] Fifthly, this application provides a communication method, which can be executed by a first communication device, which can be a network device, a chip, or a circuit. This method can be applied to 5G communication systems or communication systems above 5G. It can also be applied to non-terrestrial communication systems, etc. Optionally, the chip can be a chip in a network device. This application does not limit this. Optionally, the circuit can be a circuit in a network device. This application does not limit this. The method is executed as follows:

[0038] A low-power signal is transmitted, which includes tenth bit information and R2 eleventh bits information. The time unit occupied by the tenth bit information is modulated by non-on keying, and the number of bits carried is an integer multiple of the number of bits of the eleventh bit information. R2 is a positive integer.

[0039] Sixthly, this application provides a communication method, which can be executed by a second communication device, which can be a network device, a chip, or a circuit. This method can be applied to 5G communication systems or communication systems above 5G. This method can also be applied to non-terrestrial communication systems, etc. Optionally, the chip can be a chip in a terminal device. This application does not limit this. Optionally, the circuit can be a circuit in a terminal device. This application does not limit this. The method is executed as follows:

[0040] The system receives a low-power signal, which includes a tenth bit and R2 eleventh bits. The tenth bit is modulated by a non-on keying mechanism, and the number of bits it carries is an integer multiple of the number of bits in the eleventh bit. R2 is a positive integer.

[0041] In this application, the number of bits carried by the low-power signal based on coding and OOK modulation is an integer multiple of the number of bits carried by the non-OOK modulation, which can reduce the transmission of redundant resources, ensure the energy balance within the OFDM symbol, and not increase the complexity of the terminal detecting the low-power signal, thus adapting to the needs of terminals that support different types of receivers.

[0042] In conjunction with the fifth or sixth aspect, in one alternative approach, the tenth bit of information is based on on-keyed OOK modulation, and the eleventh bit of information is based on non-OOK modulation.

[0043] In conjunction with the fifth or sixth aspect, in one alternative manner, non-OOK modulation includes one or more of the following: representing different bit states of the eleventh bit information through different sequences, representing different bit states of the eleventh bit information through different phases, representing different bit states of the eleventh bit information through different cyclic shifts of the same sequence, or representing different bit states of the eleventh bit information through different root sequences.

[0044] In conjunction with the fifth or sixth aspect, in one alternative approach, the tenth bit is used to determine the terminal identifier or the terminal subgroup identifier, and the eleventh bit is used to determine the terminal identifier or the terminal subgroup identifier.

[0045] In a seventh aspect, embodiments of this application provide a communication device, which can be a terminal or a network device. The communication device has the functions to implement the first to sixth aspects described above. For example, the communication device includes modules, units, or means that perform the steps involved in the first to sixth aspects. These functions, units, or means can be implemented by software, hardware, or hardware executing corresponding software.

[0046] In one possible design, the communication device includes a processing unit and a transceiver unit. The transceiver unit can be used to send and receive signals to enable communication between the communication device and other devices. The processing unit can be used to perform some internal operations of the communication device. The transceiver unit can be called an input / output unit, a communication unit, etc., and can be a transceiver; the processing unit can be a processor. When the communication device is a module (e.g., a chip) in a communication device, the transceiver unit can be an input / output interface, input / output circuit, or input / output pins, etc., and can also be called an interface, communication interface, or interface circuit, etc.; the processing unit can be a processor, processing circuit, or logic circuit, etc.

[0047] In another possible design, the communication device includes a processor and may further include a transceiver for transmitting and receiving signals. The processor executes program instructions to perform the methods in any of the possible designs or implementations of the first to sixth aspects described above. The communication device may also include one or more memories coupled to the processor. The memories may store necessary computer programs or instructions for implementing the functions described in the first to fourth aspects. The processor can execute the computer programs or instructions stored in the memories, causing the communication device to implement the methods in any of the possible designs or implementations of the first to sixth aspects described above when the computer programs or instructions are executed.

[0048] In another possible design, the communication device includes a processor that can be coupled to a memory. The memory can store necessary computer programs or instructions for implementing the functions described in the first to sixth aspects above. The processor can execute the computer programs or instructions stored in the memory, causing the communication device to implement the methods in any possible design or implementation of the first to sixth aspects above when the computer programs or instructions are executed.

[0049] In another possible design, the communication device includes a processor and an interface circuit, wherein the processor is used to communicate with other devices through the interface circuit and to perform the methods in any possible design or implementation of the first to sixth aspects described above.

[0050] Understandably, in the seventh aspect mentioned above, the processor can be implemented in hardware or software. When implemented in hardware, the processor can be a logic circuit, integrated circuit, etc.; when implemented in software, the processor can be a general-purpose processor that reads software code stored in memory. Furthermore, there can be one or more processors, and one or more memories. The memory can be integrated with the processor, or the memory and processor can be separate. In specific implementations, the memory can be integrated with the processor on the same chip, or it can be set on different chips. This application does not limit the type of memory or the arrangement of the memory and processor.

[0051] Eighthly, embodiments of this application provide a communication system, which includes the first communication device and the second communication device described above.

[0052] Ninthly, this application provides a chip system including a processor and potentially a memory for implementing the methods described in the first to sixth aspects. The chip system may be composed of chips or may include chips and other discrete devices.

[0053] In a tenth aspect, this application also provides a computer-readable storage medium, which may be a volatile storage medium or a non-volatile storage medium, wherein the computer-readable storage medium stores computer-readable instructions that, when executed on a computer, cause the computer to perform the methods as described in the first to sixth aspects.

[0054] In the eleventh aspect, this application provides a computer program product containing instructions that, when run on a computer, cause the computer to perform the methods of the embodiments of the first to sixth aspects described above. Attached Figure Description

[0055] Figure 1 A schematic diagram of a communication system is shown;

[0056] Figure 2 A schematic diagram of a low-power wake-up circuit is shown.

[0057] Figure 3 A schematic diagram of OOK modulation is shown;

[0058] Figure 4 A schematic diagram of OFDM modulation is shown;

[0059] Figure 5 A schematic diagram illustrating a method for generating low-power signals is shown.

[0060] Figure 6A schematic diagram illustrating a method for generating low-power signals is shown.

[0061] Figure 7 A schematic diagram illustrating a method for generating low-power signals is shown.

[0062] Figure 8 This illustration shows a flowchart of a communication method provided in an embodiment of this application;

[0063] Figure 9A A schematic diagram of a low-power signal generation method provided in an embodiment of this application is shown;

[0064] Figure 9B A schematic diagram of a low-power signal generation method provided in an embodiment of this application is shown;

[0065] Figure 9C A schematic diagram of a low-power signal generation method provided in an embodiment of this application is shown;

[0066] Figure 10 This illustration shows a flowchart of a communication method provided in an embodiment of this application;

[0067] Figure 11A A schematic diagram of a low-power signal generation method provided in an embodiment of this application is shown;

[0068] Figure 11B A schematic diagram of a low-power signal generation method provided in an embodiment of this application is shown;

[0069] Figure 12A A schematic diagram of a low-power signal generation method provided in an embodiment of this application is shown;

[0070] Figure 12B A schematic diagram of a low-power signal generation method provided in an embodiment of this application is shown;

[0071] Figure 13 This illustration shows a flowchart of a communication method provided in an embodiment of this application;

[0072] Figure 14 A schematic diagram of a low-power signal generation method provided in an embodiment of this application is shown;

[0073] Figure 15 A schematic diagram of the structure of the communication device provided in an embodiment of this application is shown;

[0074] Figure 16 A schematic diagram of the structure of the communication device provided in an embodiment of this application is shown;

[0075] Figure 17 A schematic diagram of the structure of the communication device provided in an embodiment of this application is shown. Detailed Implementation

[0076] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. The specific operational methods in the method embodiments can also be applied to the device embodiments or system embodiments. In the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. For example, A / B means: A or B. In the formulas of this application, the character " / " indicates that the preceding and following related objects are in a "division" relationship. "Including at least one of A, B, and C" can mean: 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 refer to any combination of these items, including any combination of single or plural 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 a single item or multiple items.

[0077] The term "carry" mentioned in this application embodiment can be understood as "mapping", "including", or "bearing", etc.

[0078] The ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the size, content, order, timing, priority, or importance of the multiple objects. Furthermore, the numbering of steps in the various embodiments described in this application is only to distinguish different steps and is not used to limit the order in which the steps are performed.

[0079] The technical solutions provided in this application can be applied to 5G systems, or to future communication systems or other similar communication systems. Furthermore, the technical solutions provided in this application can be applied to cellular links, public land mobile networks (PLMNs), machine-to-machine (M2M) networks, Internet of Things (IoT) networks, or other networks. They can also be applied to links between devices, such as device-to-device (D2D) links. D2D links can also be called sidelinks, which are also referred to as secondary links or auxiliary links. In this application, the above terms all refer to links established between devices of the same type, and their meanings are the same. The so-called "same type of devices" can be links between terminals, between base stations, or between relay nodes, etc., and this application does not limit this.

[0080] Figure 1 This is a schematic diagram of the architecture of the communication system 1000 used in an embodiment of this application. Figure 1 As shown, the communication system includes a wireless access network 100 and a core network 200. Optionally, the communication system 1000 may also include an Internet 300. The wireless access network 100 may include at least one wireless access network device (such as...). Figure 1 110a and 110b in the above), may also include at least one terminal (such as Figure 1 (Referring to 120a-120j in the original text). Terminals connect wirelessly to the wireless access network (WLAN) equipment, which in turn connects to the core network via wireless or wired connections. The core network equipment and the WLAN equipment can be independent physical devices, or they can integrate the functions of the core network equipment and the logical functions of the WLAN equipment onto the same physical device. Alternatively, a single physical device can integrate some of the functions of both the core network equipment and the WLAN equipment. Terminals and WLAN equipment can be interconnected via wired or wireless connections. Figure 1 This is just an illustration; the communication system may also include other network devices, such as wireless repeaters and wireless backhaul devices. Figure 1 It is not shown in the middle.

[0081] Radio access network equipment 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 base station in a future mobile communication system, or an access node in a WiFi system; it can also be a module or unit that performs some of the functions of a base station. In some deployments, a gNB may include a CU and a DU. The CU implements some of the functions of the gNB, and the DU implements some of the functions of the gNB. For example, the CU is responsible for handling non-real-time protocols and services. For example, it implements the functions of radio resource control (RRC), service data adaptation protocol (SDAP), and packet data convergence protocol (PDCP). The DU is responsible for handling physical layer protocols and real-time services. For example, it implements the functions of the radio link control (RLC), medium access control (MAC), and physical (PHY) layers. The gNB may also include an active antenna unit (AAU). The AAU implements some physical layer processing functions, radio frequency processing, and related functions of the active antenna. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, in this architecture, higher-layer signaling (e.g., RRC layer signaling) can also be considered to be sent by the DU, or by the DU and the AAU. It is understood that the network device can be one or more of the following: CU node, DU node, and AAU node. In addition, the CU can be a network device in the radio access network (RAN), or a network device in the core network (CN), which is not limited in this application. Furthermore, in the embodiments of this application, the network device provides services to the cell, and the terminal communicates with the network device through the transmission resources (e.g., frequency domain resources, or spectrum resources) used by the cell. The cell can be the cell corresponding to the network device (e.g., a base station). The cell can belong to a macro base station or to a base station corresponding to a small cell.For example, small cells can include: metrocells, microcells, pico cells, femto cells, etc. Because small cells have small coverage areas and low transmission power, they can provide high-speed data transmission services. Furthermore, in other possible cases, the network device can be other devices that provide wireless communication functions for terminals. The embodiments of this application do not limit the specific technology or device form used in the network device. For example, in an open radio access network (ORAN) system, a CU can also be called an O-CU (open CU), a DU can also be called an O-DU, a CU-CP can also be called an O-CU-CP, a CU-UP can also be called an O-CU-UP, and a RU can also be called an O-RU. For ease of description, this application uses CU, CU-CP, CU-UP, DU, and RU as examples. Any of the CU (or CU-CP, CU-UP), DU, and RU units in this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules. For specific descriptions of the aforementioned protocol layers, please refer to the relevant technical specifications of the 3rd Generation Partnership Project (3GPP). The radio access network equipment can be a macro base station (e.g.,...). Figure 1 110a in the text), can also be a micro base station or an indoor station (such as... Figure 1 110b) in the text can also be a relay node or a donor node, etc. The embodiments of this application do not limit the specific technology or device form used in the wireless access network equipment.

[0082] A terminal can also be referred to as user equipment (UE), mobile station, or mobile terminal (MT). Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), the Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, and smart cities. Terminals can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc. The embodiments of this application do not limit the specific technologies or device forms used in the terminal.

[0083] Network devices and terminals can be fixed in location or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can be deployed on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of the network devices and terminals.

[0084] The roles of network devices and terminals can be relative, for example, Figure 1 The helicopter or drone 120i can be configured as a mobile network device. For terminals 120j accessing the wireless access network 100 via 120i, drone 120i is a network device; however, for network device 110a, 120i is a terminal, meaning that 110a and 120i communicate via a wireless air interface protocol. Of course, 110a and 120i can also communicate via a network device-to-network device interface protocol; in this case, 120i is also a network device relative to 110a. Therefore, both network devices and terminals can be collectively referred to as communication devices. Figure 1 110a and 110b can be referred to as communication devices with network equipment functions. Figure 1 The 120a-120j in the text can be referred to as communication devices with terminal functions.

[0085] Communication between network devices and terminals, between network devices, and between terminals can be conducted using licensed spectrum, unlicensed spectrum, or both simultaneously. Communication can be conducted using spectrum below 6 GHz, spectrum above 6 GHz, or both simultaneously. The embodiments of this application do not limit the spectrum resources used for wireless communication.

[0086] In the embodiments of this application, the functions of the network device can be executed by modules (such as chips) within the network device, or by a control subsystem that includes network device functions. This control subsystem, including network device functions, can be a control center in the aforementioned application scenarios such as smart grids, industrial control, intelligent transportation, and smart cities. Similarly, the functions of the terminal can be executed by modules (such as chips or modems) within the terminal, or by a device that includes terminal functions.

[0087] To further reduce power consumption, the UE can also use a circuit different from the MR to receive signals, such as an LP-WUR (wherein, LP-WUR can be called a low-power wake-up receiver, auxiliary receiver, low-power receiver, low-power receiver, low-power wake-up receiver, etc., without specific limitations here). This LP-WUR can be implemented using a simple circuit or chip with low power consumption. The LP-WUR is used to receive LP-WUS from network devices. When the UE detects or receives LP-WUS, it demodulates the wake-up indication information based on the information carried in the LP-WUS, and the UE wakes up the MR that is turned off (or in a sleep state) within the UE. The LP-WUS can be used to wake up at least one UE or at least a group of UEs. To reduce the power consumption of the LP-WUR circuit, the LP-WUS signal is usually modulated using simple modulation methods such as OOK; correspondingly, the LP-WUR in the UE uses envelope detection to receive the LP-WUS. The UE using this LP-WUR to receive the wake-up signal can be referred to as operating on the WUR / LR link, or as the WUR / LR being in a working state.

[0088] For example, upon power-on, the UE can first search for the NR primary link signal in the MR (Mobile Registry). If the NR primary link signal is found, the UE can camp on the NR primary link. If the NR primary link signal indicates LP-WUS configuration information, the UE can further search for LP-WUS in the LP-WUR (LP-Wurf Registry) based on the LP-WUS configuration information. If LP-WUS is found and its signal quality is good, the UE can operate in the LP-WUR. Alternatively, upon power-on, the UE can first search for the NR primary link signal in the MR. If the NR primary link signal cannot be found, it can search for LP-WUS based on the pre-configured information within the UE. If LP-WUS is found and its signal quality is good, the UE can operate in the LP-WUR.

[0089] For reference Figure 2 This is a schematic diagram illustrating the working principles of LP-WUR and MR. Figure 2 In this example, LP-WUS is a low-power circuit. After the UE is operating in the low-power circuit, if it detects LP-WUS, it can trigger MR to start, so as to receive paging, monitor PDCCH, receive SSB, receive TRS, or initiate random access, etc. However, if the UE does not detect LP-WUS and is within the LP-WUS coverage area, the UE does not report processing information to the network device, and the UE does not need to trigger MR to start. MR can remain off (or remain in sleep mode), thereby reducing the working time of MR and saving the UE's power consumption.

[0090] The following is an explanation of the relevant terms used in the embodiments of this application. Unless otherwise specified, these explanations are provided to support the meaning of the relevant terms and to make the embodiments of this application easier to understand, and should not be regarded as a strict limitation of the relevant terms within the scope of protection claimed by this application.

[0091] 1) Low-power signal (or low-power wake-up signal)

[0092] Besides LP-WUS, this application does not limit the type of low-power signal in its embodiments. For example, the low-power signal can be a low-power PDCCH, low-power PDSCH, low-power PUSCH, low-power PUCCH, low-power SSB, low-power synchronization signal, low-power TRS, low-power CSI-RS, low-power positioning signal, low-power sensing communication signal, low-power sounding reference signal (SRS), low-power random access channel (RACH), low-power preamble, low-power contention resolution message, low-power downlink control information (DCI), or low-power UCI signal, etc. The size of the bit information of a low-power signal is determined by one or more of the following: Physical Layer, Core Network, MAC Layer (medium access control), Radio Link Control (RLC) Layer, Packet Data Convergence Protocol (PDCP) Layer, Service Data Adaptation Protocol (SDAP) Layer, Radio Resource Control (RRC) Layer, or Core Network.

[0093] The signal bits of the low-power signal can be associated with a terminal or a terminal subgroup. For example, when the terminal is in a disconnected state (e.g., the idle state or inactive state), the signal bits can be used to determine one or more terminal identifiers, or to determine one or more terminal subgroup identifiers. When the terminal is in a connected state, the signal bits can indicate whether to wake up one or more terminals for information transmission; or, the signal bits can indicate whether to wake up terminals within one or more terminal subgroups for information transmission; or, the signal bits can determine one or more terminal identifiers; or, the signal bits can determine one or more terminal subgroup identifiers. Based on this, after demodulating the signal bits of the low-power signal, the terminal can clearly determine which operation to perform, and different operations will result in different false alarm rates, false detection rates, and resource utilization rates, achieving greater flexibility. For example, a low-power signal is 8 bits; using 8 bits to determine multiple terminal identifiers versus using 8 bits to determine one terminal identifier requires more bits for a single terminal identifier. Furthermore, the false alarm rate (i.e., the probability of making an incorrect determination of whether to wake up the terminal's main receiver) is higher when the terminal detects one of the eight bits to determine whether to wake up the main receiver, compared to detecting all eight bits.

[0094] The aforementioned information transmission may include one or more of the following methods: monitoring PDCCH, sending UCI, sending PUCCH, sending PUSCH, receiving PDSCH, receiving SSB, receiving CSI-RS, or receiving TRS. This is merely illustrative and not specifically limited to any particular method of information transmission. For example, after the terminal's main receiver is woken up, the terminal can monitor the PDCCH and receive PDSCH, etc., on resources specified by the network device. Alternatively, the terminal can receive SSB, CSI-RS, TRS, etc., on specified resources. Or, the terminal can send UCI or PUSCH to the network device to avoid blindly sending or receiving information, reducing the ineffective activation of high-power receivers and achieving energy saving. This is merely illustrative and not specifically limited to any particular behavior of information transmission. Furthermore, the terminal can reuse the aforementioned information to carry service data; for example, the terminal can send location information, sensing information, etc., to the network device via uplink signals, which is not specifically limited here.

[0095] In addition, the low-power signal may include CRC bit information. When CRC bit information is included in the low-power signal, the terminal must first verify whether the CRC bit information is correct, and only after confirming that the CRC bit information is correct will it judge the signal bit information corresponding to itself in the low-power signal. This method can avoid interference from invalid low-power signals, further improve the detection performance of the terminal, reduce the false alarm rate, and will not wake up the terminal's main receiver when the CRC check is abnormal, thus saving terminal power consumption.

[0096] When the terminal is in an idle or disconnected state, the main receiver is turned off or put into sleep mode. The network device sends a low-power signal to the terminal, and the terminal's activated low-power receiver receives the low-power signal from the network device. This low-power signal is used to determine whether to start PDCCH monitoring at some point in the future. The terminal decides whether to wake up the main receiver based on the indication carried in the low-power signal, such as the terminal identifier, terminal group identifier, or terminal subgroup identifier. The terminal uses the main receiver to receive paging messages from the network device. The terminal performs random access or other operations based on the indication in the paging message. When the terminal is in an idle or disconnected state, the low-power signal can be called a low-power wake-up signal. For example, the low-power signal carries information related to the paging terminal, such as the paging terminal identifier, paging terminal group identifier, or paging terminal subgroup identifier. When the terminal receives this low-power signal, it can match the information in the low-power signal with its own information (perform correlation). If the two match (the correlation value is large or greater than a threshold), the terminal believes that the network device is paging it. Furthermore, the terminal can perform random access or other operations based on the indication of the low-power signal, without restriction. The receiver performing random access or other operations can be the terminal's main receiver or the low-power receiver. For example, the low-power signal contains bit information 1101, representing the identifier of terminal #1. If terminal #1 detects this low-power signal, it starts PDCCH monitoring. For example, the signal bit information can be used to identify two terminal identifiers, each with 4 bits. The low-power signal's signal bit information is 11010010, where 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 paged 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, the main receiver of terminal #1 is not woken up. 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 master receiver. If the last 4 bits of the low-power signal detected by terminal #2 are not 0010, the master receiver of terminal #2 is not woken up. For example, the signal bit information can be used to identify two terminal subgroups, each with 4 bits. The low-power signal information bits are 11010010, where 1101 is the identifier for terminal subgroup 1 and 0010 is the identifier for terminal subgroup 2.If the first four bits of the low-power signal information sent by the network device are 1101, it indicates that the network is paged terminal subgroup 1. In this case, the master receivers of all terminals belonging to terminal subgroup 1 will be woken up. If the first four bits of the low-power signal information detected by a terminal belonging to terminal subgroup 1 are not 1101, then the master receivers of all terminals belonging to terminal subgroup 1 will not be woken up. Similarly, if the last four bits of the low-power signal information sent by the network device are 0010, it indicates that the network is paged terminal subgroup 2. In this case, the master receivers of all terminals belonging to terminal subgroup 2 will be woken up. If the last four bits of the low-power signal information detected by a terminal belonging to terminal subgroup 2 are not 0010, then the master receivers of all terminals belonging to terminal subgroup 2 will not be woken up. This is merely an illustrative example and is not intended to be specific. It should be noted that if the low-power signal includes CRC check bits, then both terminal #1 and terminal #2 must detect all the signal bit information of the low-power signal, and then determine whether the bit information corresponding to itself matches the sequence stored locally.

[0097] It should be noted that the above phrase "low-power signal used to indicate whether to wake up the master receiver" can be replaced with: "low-power signal used to indicate whether the network device sends a paging message to the terminal," or "low-power signal used to indicate whether the terminal monitors the PDCCH," or "low-power signal used to indicate whether the terminal receives a paging message." When the indication information carried in the low-power signal indicates whether to wake up or turn on the master receiver, or whether the master receiver switches from sleep mode to a state capable of receiving the PDCCH, or when the information carried in the low-power signal (e.g., terminal identifier, terminal group identifier, or terminal subgroup identifier) ​​matches the information stored locally on the terminal, it indicates that the network device will subsequently page the terminal. In this case, the terminal can turn on or wake up the master receiver, or switch from sleep mode to a state capable of receiving the PDCCH, receive the paging message, or perform random access. Otherwise, when the information carried in the low-power signal does not match the information stored locally on the terminal, it indicates that the network device will not subsequently page the terminal. In this case, the terminal can either not turn on or wake up the master receiver, or the master receiver can remain in a deep sleep state, further saving the terminal's power consumption. The information stored locally on the terminal includes one or more of the following: terminal identifier, terminal group identifier, and terminal subgroup identifier.

[0098] When the terminal is in a connected state and the main receiver is in a light sleep state, the network device sends a low-power signal to the terminal. The terminal uses its activated low-power receiver to receive the low-power signal from the network device. The main receiver is activated when the indication information carried in the low-power signal indicates whether to wake up or activate the main receiver, or when the information carried in the low-power signal matches the terminal's information. The terminal uses the main receiver to receive downlink information from the network device, such as downlink control information, downlink data information, or synchronization signals. It is understood that downlink control information can be transmitted in the PDCCH, and downlink data information can be transmitted in the PDSCH. Based on the above, the terminal using the main receiver to receive downlink control information or downlink data information from the network device can be described as: the terminal using the main receiver receives the PDCCH or PDSCH from the network device, etc. Alternatively, the terminal using the main receiver sends uplink information to the network device, such as uplink control information or uplink data information. It is understood that uplink control information can be transmitted in the PUCCH, and uplink data information can be transmitted in the PUSCH. The above describes the terminal using its master receiver to send uplink control information or uplink data information to the network device. This can be described as the terminal using its master receiver to send PUCCH or PUSCH, etc., to the network device. For example, the signal bit information, based on a bitmap, can be used to indicate whether to wake up four terminals for information transmission. The information bit information is 1001, where 1 indicates waking up the master receiver to transmit PUCCH, and 0 indicates not waking up the master receiver to transmit PUCCH. Here, 1001 corresponds to UE1, UE2, UE3, and UE4 respectively. After UE1 and UE4 receive the low-power signal, their corresponding master receivers will be woken up to transmit PDCCH. After UE2 and UE3 receive the low-power signal, their corresponding master receivers will not be woken up to transmit PDCCH. This is only an illustrative example and is not a specific limitation. When the terminal is in a connected state, if the low-power signal is used to determine the terminal identification information, the example above regarding the terminal being in an idle or disconnected state can be used for understanding.

[0099] It should be noted that the above statement "the low-power signal is used to indicate whether to wake up the master receiver" can be replaced with: the low-power signal is used to indicate whether the network device sends downlink information to the terminal; it can also be replaced with: the low-power signal is used to indicate whether the terminal sends uplink information to the network device; it can also be replaced with: the low-power signal is used to indicate whether the terminal monitors the PDCCH; or it can be replaced with: 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 waking up or turning on the master receiver, or when the information carried in the low-power signal matches the terminal's information, 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. In this case, the terminal can turn on or wake up the master 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 before determining whether its own bit information matches the sequence stored locally.

[0100] When a low-power signal is used to explicitly or implicitly indicate that the main receiver should not be woken up or turned on, or when the information carried in the low-power signal does not match the information stored locally on the terminal, it indicates that the network device will not send downlink information to the terminal for a subsequent period of time, or will not schedule the terminal to send uplink information. Optionally, the subsequent period of time is one or more paging cycles, or one or more discontinuous reception (DRX) cycles. During this time, the terminal can continue to keep the main receiver off, or the main receiver can be in sleep mode.

[0101] 2) Types of WUR

[0102] LP-WUS bit information can be mapped to time units in various ways, or in other words, LP-WUS bit information can be modulated in various ways. For example, LP-WUS can use OOK modulation, and correspondingly, the WUR in the terminal receives LP-WUS using envelope detection. As another example, WUS can also be transmitted using OFDM waveforms, and correspondingly, the WUR in the terminal receives LP-WUS using phase detection. For ease of description, in this embodiment, LP-WUS using OFDM waveform transmission is referred to as LP-WUS using OFDM modulation (which will be described below).

[0103] A WUR that receives LP-WUS using phase detection can be considered as one type of receiver (e.g., called a Type I WUR), while a WUR that receives LP-WUS using envelope detection can be considered as another type of WUR (e.g., called a Type II WUR). The terms Type I and Type II WUR are relative and can be interpreted in various ways. Examples are given below.

[0104] 2.1) The first type of WUR is an OFDM receiver, and the second type of WUR is an OOK receiver.

[0105] 2.2) The first type of WUR is a receiver with both I and Q channels, and the second type of WUR is a receiver with only one of the I and Q channels.

[0106] 2.3) Type I WUR is a coherent receiver, and Type II WUR is a non-coherent receiver.

[0107] 2.4) The first type of WUR is a coherent receiver with both I and Q channels, while the second type of WUR is a non-coherent receiver with only one of the I and Q channels.

[0108] 2.5) Type I WURs receive signals using phase detection, while Type II WURs receive signals using energy / power / amplitude detection. Alternatively, Type I WURs can / are able to detect phase information, and Type II WURs can / are able to detect signal energy / power / amplitude.

[0109] 2.6) Type I WURs can receive complex signals, while Type II WURs cannot receive complex signals (e.g., Type II WURs receive real signals).

[0110] 2.7) The first type of WUR has phase detection capability, while the second type of WUR has envelope detection capability or no phase detection capability. Alternatively, the first type of WUR supports receiving signals via phase detection, while the second type of WUR supports receiving signals via envelope detection. In the embodiments of this application, phase detection capability can be interchanged with correlation detection capability and sequence detection capability.

[0111] 2.8) Type I receivers can receive OFDM signals, while Type II receivers cannot receive OFDM signals (e.g., Type II receivers receive OOK signals).

[0112] 3) OOK modulation and OFDM modulation

[0113] OOK modulation uses the presence or absence of a signal to represent digital information. The bit information corresponding to a signal is mapped to a time unit through OOK modulation. One time unit corresponds to two bits of information, and the bit information of the signal is determined by detecting whether there is a signal in the time unit. A signal in a time unit means that the signal amplitude in the time unit is not zero; this time unit is also called an ON time unit, or the time unit is in ON mode. Conversely, a signal amplitude in a time unit is zero; this time unit is also called an OFF time unit, or the time unit is in OFF mode. Generally, if a sequence is transmitted in a time unit, then that time unit has a signal; if no sequence is transmitted in a time unit, then that time unit has no signal. For a time unit, an ON time unit or an ON mode can be decoded as 1; conversely, an OFF time unit or an OFF mode can be decoded as 0.

[0114] See Figure 3 This illustrates the principle of OOK modulation. Figure 3 Taking a signal with bit information 1001 as an example, after OOK modulation, this 4-bit information is sequentially mapped to two time units (e.g., time unit 1 to time unit 2). It should be understood that the ON time units of time unit 1 and time unit 2 are signal-enabled time units, with sequence transmission occurring during these units. Conversely, the ON time units of time unit 1 and time unit 2 are signal-free time units, with no sequence transmission during these units. When the receiver detects a sequence in the ON time units of time unit 1 and time unit 2, it can decode it as 1. When the receiver does not detect a sequence in the ON time units of time unit 1 and time unit 2, it can decode it as 0. Combining the decoding of the two time units yields 1001. It can be seen that for OOK modulation, only 2 bits of information can be obtained within one time unit. It is understandable that a sequence of time units detected by the receiver refers to the envelope of the signal detected by the receiver in that time unit; correspondingly, a sequence of time units not detected by the receiver refers to the envelope of the signal not detected by the receiver in that time unit.

[0115] See Figure 4 This illustrates the principle of OFDM modulation. Figure 4Taking an example where the transmitting end stores four sequences (sequences 1 to 4 in the diagram). These four sequences can be used to 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 corresponding bit information is 01. Then, the access network device can determine the sequence 2 corresponding to bit information 01 based on the above correspondence between the four sequences and bit information.

[0116] from Figure 4 It can be seen that, in addition to obtaining 1 bit of information through the ON / OFF mode within a time unit, the sequence information of the ON time unit can also be detected (such as...). Figure 4 (2 bits of sequence information). Compared to OOK modulation, OFDM modulation can obtain more bits of information. Therefore, OFDM-based signals require less time-domain resources to transmit the same length of bit information compared to OOK modulation. For example, to transmit the same length of bit information, OFDM modulation requires W symbols, while OOK modulation requires G symbols, where W is less than G, and both W and G are positive numbers.

[0117] 4) Time unit

[0118] In this application embodiment, "time unit" refers to any unit of time. A time unit can be a radio frame, subframe, slot, mini-slot, hour (h), minute (min), second (s), millisecond (ms), a partial OFDM symbol, an OOK time unit, or a fraction of a millisecond (e.g., 1 / 32ms). Alternatively, a time unit can be multiple radio frames, multiple subframes, multiple slots, multiple mini-slots, multiple OFDM symbols, several hours, several minutes, several seconds, several milliseconds (ms), multiple partial OFDM symbols, multiple OOK symbols, multiple OOK time units, or several fractions of a millisecond. A radio frame can include multiple subframes, a subframe can include one or more slots, and a slot can include at least one OFDM symbol. Alternatively, a radio frame can include multiple slots, and a slot can include at least one OFDM symbol. For ease of distinction, in this application embodiment, the time unit mapped by OOK modulation is called an OOK time unit, and an OFDM symbol can include one or more OOK time units. The OOK time unit in ON mode is also called the OOK ON time unit. Information is continuously carried within the OOK ON time unit. The OOK time unit in OFF mode is also called the OOK OFF time unit. No information is continuously carried within the OOK OFF time unit. In this application, a time unit refers to one OOK ON time unit and one OOK OFF time unit, or one time unit is one OOK ON time unit. One OOK ON time unit is one OOK symbol. One OOK OFF time unit is one OOK symbol. No specific limitations are specified here.

[0119] 5) Non-OOK modulation

[0120] Non-OOK modulation represents different bit states of the signal bit information of a low-power signal (e.g., the second, sixth, and eleventh bits described below) through different sequences (sequence modulation, e.g., OFDM modulation mentioned above); or, non-OOK modulation represents different bit states of the signal bit information of a low-power signal (e.g., the second, sixth, and eleventh bits described below) through different phases (phase modulation); or, non-OOK modulation represents different bit states of the signal bit information of a low-power signal (e.g., the second, sixth, and eleventh bits described below) through different cyclic shifts of the same sequence; or, non-OOK modulation represents different bit states of the signal bit information of a low-power signal (e.g., the second, sixth, and eleventh bits described below) through different root sequences. For example, four different sequences can be used to represent the bit states of four different signal bit information of a low-power signal, with four different candidate sequences: sequence #1, sequence #2, sequence #3, and sequence #4, representing different bit states 00, 01, 10, and 11, respectively. For example, the sequence could be a ZC sequence, an M sequence, a Gold sequence, or a computer-searched sequence. For instance, four different phases can represent the bit states of four different signal bits in a low-power signal. Four different candidate phases: 90 degrees, 180 degrees, 270 degrees, and 0 degrees, represent different bit states 00, 01, 10, and 11, respectively. For instance, four different cyclic shifts of the same ZC sequence can represent the bit states of four different signal bits in a low-power signal. The four different cyclic shifts are: 0, L / 4, L / 2, and 3L / 4, representing different bit states 00, 01, 10, and 11, respectively, where L is the length of the ZC sequence. For instance, different root sequences can represent the bit states of four different signal bits in a low-power signal. This can be understood as representing the bit states of four different signal bits in a low-power signal using different roots. For example, four different roots are 1, 10, 20, and 25, representing different bit states 00, 01, 10, and 11, respectively. Here, the root is the root of the sequence, such as the root of a ZC sequence.

[0121] 6) Non-OOK modulation sequence padding method

[0122] If the ratio of the number of bits in the low-power signal's bit information (e.g., the raw bits, which indicate a terminal identifier or terminal subgroup identifier) ​​to log₂L is not an integer, bit padding is required, where L is the number of candidate sequences, i.e., the number of candidate sequences carried in an OOK ON time unit. For example, if the number of candidate sequences in an OOK ON time unit is 8, then log₂L is 3. If the number of bits in the low-power signal's bit information is 5, and 5 / 3 is not divisible, then bit padding is required. Specifically, bit padding can be performed before or after the low-power signal's bit information. For example, if the low-power signal's bit information is ABC, additional bits can be padded to the bits before A (i.e., the high bits), or to the bits after C (i.e., the low bits). For example, if the additional bits are 0, if padded before the low-power signal's bit information, the padded bit information is 0ABC. If padded after the low-power signal's bit information, the padded bit information is ABC0.

[0123] Specifically, if Y is the number of bits of signal bit information of the low-power signal, the sequence is filled in as follows:

[0124] Method 1: Fill in the information as 0 or 1.

[0125] For example, the number of bits Y in the original bit information is 8, L is 8, 8 / 3 is not an integer, the bit information of the low power signal based on non-OOK modulation is 10101011, and the padding information is 0. If the padding bit is before the original bit information, the padded bit information is 010101011. If the padding bit is after the original bit information, the padded bit information is 101010110. This is only an example and is not specifically limited.

[0126] Method 2: The padding information consists of log2L - [Y mod log2L] bits from the original bit information.

[0127] For example, Y is 5, L is 8, 5 / 3 is not an integer, the original bit information is ABCDE, and the padding information is one bit from ABCDE. If the padding bit is A, the bit information after padding the original bit information is AABCDE or ABCDEA. If the padding bit is E, the bit information after padding the original bit information is EABCDE or ABCDEE. If the padding bit is C, the bit information after padding the original bit information is CABCDE or ABCDEC. This is only an example and is not specifically limited.

[0128] 7) Methods for determining low-power signals (modulation method, and / or encoding method)

[0129] Method 1: Low-power signal based on OOK modulation (which can be understood as a modulation method)

[0130] The ON / OFF mode, modulated by OOK, carries all the information of the low-power signal. For the terminal, the LP-WUS signal detection method depends on the type of LP-WUR receiver.

[0131] If the LP-WUR is a receiver that only supports envelope detection, then the LP-WUR performs energy detection for each OOK symbol. (As described above) Figure 3 As shown, the bit information of the low-power signal is 1001, for example.

[0132] Method 2: Low-power signals are based on OOK modulation and Manchester coding (which can be understood as modulation and coding methods).

[0133] To reduce the false detection rate of useful signals caused by noise interference, Manchester coding is introduced, which uses the relative energy of two consecutive OOK symbols to determine the bit state of one bit. For example... Figure 5 As shown, the energies of the first and second OOK symbols are compared, and the energies of the third and fourth OOK symbols are compared. If the energy of the first OOK symbol is greater than that of the second OOK symbol, the bit state is 0. If the energy of the third OOK symbol is less than that of the fourth OOK symbol, the bit state is 1. For method two, two OOK symbols correspond to one OFDM symbol or one time unit.

[0134] Method 3: The low-power signal portion is based on OOK modulation, while the low-power signal portion is based only on non-OOK modulation. Optionally, the low-power signal is also based on Manchester encoding.

[0135] like Figure 6 As shown, there are four candidate sequences in the OOK ON time unit (i.e., the first symbol): sequence 1 (00), sequence 2 (0 1), sequence 3 (1 0), and sequence 4 (1 1), which can represent 2 bits of information (i.e., part of the second bit information of the low-power signal). The energy relationship between the OOK ON time unit and the OOK OFF mode is used to carry another part of the information (i.e., part of the first bit information). Based on this method, compared with method two, transmitting the same number of low-power signals requires less time-domain resources. When distinguishing different sequences, the received signal is correlated with the locally stored sequence, resulting in better detection performance and superior coverage performance.

[0136] In method three, two OOK symbols represent 1 bit of information. Figure 6The signal bit information of the low-power signal has a bit value of 1010, and the low-power signal is based on Manchester encoding, occupying four OOK symbols. Among them, the OOK ON time unit carries 2 bits of information (sequence 3: 10), and the OOK ON time unit and OOK OFF mode carry 2 bits of information (10). For mode 3, two OOK symbols correspond to one OFDM symbol or one time unit.

[0137] Method 4: The modulation method for the low-power signal is based solely on non-OOK modulation. Optionally, the low-power signal may also be based on Manchester coding.

[0138] Low-power signals carry all their information through a scrambled sequence within the OOK symbol of the signal. Assume all 4 bits of the low-power signal are carried through OOK-ON time units. For example, if there are 16 candidate sequences in one OOK-ON time unit, then one OOK-ON time unit can carry 4 bits of information. Alternatively, if there are 4 candidate sequences in one OOK-ON time unit, then one OOK-ON time unit can carry 2 bits of information. If the complete bit information of the low-power signal is 4 bits, then two OOK-ON time units are needed to carry all the information.

[0139] Method 5: The low-power signal is based on OOK modulation, and the low-power signal is also based on non-OOK modulation. Optionally, the low-power signal is also based on Manchester coding.

[0140] The ON / OFF mode, modulated by OOK, carries all the information of the low-power signal. Furthermore, the sequence carried by the OOK ON time unit also carries all the information of the low-power signal. This is a combination of methods two and four described above.

[0141] Map once using method two, then map once using method four. Both terminals with envelope detection receivers and OFDM receivers can demodulate low-power signals.

[0142] To improve signal coverage, when generating low-power signals using method five, the low-power signal can first be encoded (e.g., RM encoding), and then optionally rate-matched. The rate-matched information (where rate matching methods include puncturing or truncating) is then subjected to OOK modulation. For example, the original bit information of the low-power signal is 4 bits, which becomes 32 bits after RM encoding. Rate matching of this 32-bit information yields 9 bits, which are then OOK modulated. These 9 bits occupy 9 OOK symbols. One OFDM symbol consists of 2 OOK symbols, such as... Figure 7The 001010010 shown represents the bit information of a low-power signal after encoding, rate matching, OOK modulation, and Manchester coding. This low-power signal sequence occupies 9 OFDM symbols. With non-OOK modulation, there are 4 candidate sequences in one OOK ON time unit, meaning one OOK ON time unit can carry 2 bits of information. Since the low-power signal has 4 bits of signal information, it requires 2 OOK ON time units. Repeated transmission of non-OOK modulation can improve signal coverage; however, repeated transmission of non-OOK modulation occupies 8 OFDM symbols. Access network equipment actually transmits low-power signals using 9 OFDM symbols, but non-OOK modulation only occupies 8 OFDM symbols. Is the remaining 1 OOK ON time unit used to carry information? If so, how is the sequence carried? The relevant technology does not explain this.

[0143] Based on this, this application provides a communication method to generate LP-WUS signals based on the above two methods, ensuring that all OOK ON time units carry information, thereby guaranteeing the detection reliability and low complexity of LP-WUS. To better understand the scheme of this application, the following three implementation methods can be used as a reference. In implementation method one, the number of time units occupied by the bit information of the low-power signal based on encoding and OOK modulation is an integer multiple of the number of time units occupied by the bit information of the non-repeating low-power signal based on non-OOK modulation. In implementation method two, the number of time units occupied by the bit information of the low-power signal based on encoding and OOK modulation is not an integer multiple of the number of time units occupied by the bit information of the non-repeating low-power signal based on non-OOK modulation. In implementation method three, the number of bits carried by non-OOK modulation in the time units occupied by the low-power signal based on encoding and OOK modulation is an integer multiple of the number of bits of the non-repeating low-power signal based on non-OOK modulation. It should be noted that in practical applications, it is not limited to using only these three implementation methods to determine how to map the low-power signal bit information; this application does not specifically limit this.

[0144] In practical applications, the network device (or core network device) instructs the terminal to encode a low-power signal, and / or, the number of bits in the rate-matched bit information (or the first, fifth, and tenth bit information described below) is N, the number of OOK symbols included in an OFDM symbol is M, the number of bits in the low-power signal's signal bit information is X (or X1, X2 described below, or the original bit information of the low-power signal), and the number of candidate sequences carried in an OOK ON time unit is L, where N, M, L, and X are positive integers. Based on this, the detection efficiency of low-power signals can be improved. This is merely an illustrative example and is not a specific limitation.

[0145] It should be noted that in all embodiments of this application, "bit information is used to determine a terminal identifier or a terminal subgroup identifier" means that the bit information is used to determine only one terminal identifier or a terminal subgroup identifier. In all embodiments of this application, "bit information indicates a terminal identifier or a terminal subgroup identifier" means that the bit information indicates only one terminal identifier or a terminal subgroup identifier, or includes only one terminal identifier or a terminal subgroup identifier.

[0146] This method involves communication interaction between 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 a network device. This application does not limit this. Optionally, the circuit can be a circuit of a network device. This 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 a terminal. This application does not limit this. Optionally, the circuit can be a circuit of a terminal. This application does not limit this. The following description uses an example where the first communication device is a network device and the second communication device is a terminal.

[0147] This method can be applied to 4G systems, such as Long Term Evolution (LTE) systems, or to 5G systems, such as New Radio (NR) systems, or to next-generation mobile communication systems or other similar communication systems; there are no specific limitations. Furthermore, the technical solutions provided in this application can also be applied to V2X scenarios, such as NR-V2X scenarios. For example, this application can be used in fields such as factory manufacturing, smart homes, intelligent driving, assisted driving, intelligent connected vehicles, or indoor commercial scenarios.

[0148] This application does not limit the number of terminals and network devices; the examples provided are merely illustrative. Two terminals and one network device are used as an example.

[0149] Implementation Method 1: The number of time units occupied by the bit information of the low-power signal based on encoding and OOK modulation is an integer multiple of the number of time units occupied by the bit information of the non-repeating low-power signal based on non-OOK modulation.

[0150] The following is combined Figure 8 The technical solution of this application will be described in detail with specific method embodiments. It should be noted that... Figure 8 This is a schematic flowchart illustrating an embodiment of the method of this application, showing the detailed communication steps or operations of the method. However, these steps or operations are merely examples, and other operations may be performed in the embodiments of this application. Figure 8 Variations of various operations within it. Furthermore, Figure 8 Each step in the process can be followed separately according to... Figure 8The different orders presented may be executed, and it is possible that they are not intended to be executed. Figure 8 All operations within. This method executes as follows:

[0151] Step 801: The network device determines a low-power signal. The low-power signal includes a first bit of information and R1 bits of second information. The number of time units occupied by the first bit of information is an integer multiple of the number of time units occupied by the second bit of information, and R1 is a positive integer.

[0152] It should be noted that step 801 above is optional, and the low-power signal can also be pre-configured by the network device. For example, in a scenario of reporting the location of IoT devices in a factory, the identifiers of IoT devices in the factory usually do not change frequently. The network device can pre-configure a low-power signal, and the signal bit information of this low-power signal can instruct multiple IoT devices to transmit location information, etc. Alternatively, the network device can retrieve a low-power signal from other devices. For example, if network device 1 has sent a low-power signal 1 in a historical period, and this low-power signal 1 is used to wake up the main receivers of terminals 1, 3, and 4, then network device 2 can request low-power signal 1 from network device 1 to pre-wake up the main receivers of terminals 1, 3, and 4, and reuse low-power signal 1 to wake up the main receivers of terminals 1, 3, and 4. Alternatively, the correspondence between the bit information of the low-power signal and each terminal can be determined by a formula. Each terminal has its own terminal identifier or temporary mobile station identifier, and both the terminal and the network can determine the corresponding low-power signal bit information in advance through the identifier. This is only an example and is not a specific limitation.

[0153] The low-power signal can be understood as described in section 1) above, and will not be elaborated here. 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 CRC bit information of the low-power signal are mapped to OFDM symbols.

[0154] The first bit information is the low-power signal based on encoding and OOK modulation. Optionally, the first bit information is also based on rate matching and / or Manchester coded modulation. The second bit information is the low-power signal based on non-OOK modulation. The second bit information is unencoded. Non-OOK modulation can be understood with reference to the description in section 5) above, and will not be elaborated here. The first bit information is used to determine the terminal identifier or terminal subgroup identifier, and the second bit information is also used to determine the terminal identifier or terminal subgroup identifier. A terminal subgroup can also be understood as a terminal group. For example, if the terminal only supports an envelope detection receiver, the terminal identifier or terminal subgroup identifier can be obtained by demodulating the first bit information, thereby determining whether the network device is paged the terminal. If the terminal supports an OFDM receiver, the terminal identifier or terminal subgroup identifier can be obtained by demodulating the second bit information, thereby determining whether the network device is paged the terminal.

[0155] For example, the second bit information also includes padding bits, which are either the high bits or low bits of the second bit information. When the second bit information includes padding bits, the padding bits are not used to determine the terminal identifier or terminal subgroup identifier; the terminal only needs to demodulate the second bit information using the padding bits. For example, the network device indicates the value of L and the value of X to the terminal, and the network device indicates to the terminal that there are high-order padding bits in the second bit information, or the network device and the terminal agree that there are high-order padding bits in the second bit information when X / log2L is not an integer. Furthermore, if the network device indicates to the terminal that the padding method for the second bit information is method one (padding information is 0) as described in 6) above, or the network device indicates to the terminal the specific content of the padding information, then when the terminal demodulates the second bit information, if the sixth bit information is 01001, then the 0 in the first bit is not included in the terminal identifier or terminal subgroup identifier, and the 1001 in the second to fifth bits are used to determine the terminal identifier or terminal subgroup identifier. The amount of padding information is determined by X mod L.

[0156] The specific padding method for the second bit information can be understood by referring to the description in 6) above. For example, the second bit information also includes a third bit information (i.e., a type of padding bit information) and a fourth bit information. The third bit information is identical to the log2L - [X1 mod log2L] bits of the fourth bit information, where X1 is the number of bits in the fourth bit information, which is the sequence padding method described in method two of 6) above. The fourth bit information indicates the terminal identifier or the terminal subgroup identifier (i.e., the terminal can obtain the terminal identifier or the terminal subgroup identifier by demodulating the fourth bit information).

[0157] The time unit can be understood by referring to the description in 4) above. Here, we take one time unit as an example to illustrate that one OOKON time unit is one OOKON time unit.

[0158] For example, the first bit information includes Manchester encoding, and the number of time units occupied by the first bit information is N, or or The number of time units occupied by the second bit of information is For example, such as Figure 9A As shown, the second bit information does not include padding bit information. The number of time units occupied by the first bit information is 6, M is 2, X is 3, L is 8, the first bit information is 101011, and the second bit information is 111. The first bit information occupies 6 OFDM symbols, that is, 12 OOK symbols or 6 time units. The second bit information occupies 1 time unit. The second bit information is repeated 6 times (that is, within a low-power signal, the low-power signal is repeatedly transmitted 6 times based on the non-OOK modulated bit information, that is, R1 is 6).

[0159] For example, the first bit information includes Manchester encoding, and the number of time units occupied by the first bit information is N, or or The number of time units occupied by the second bit of information is For example, such as Figure 9B As shown, the second bit information includes padding bit information. The number of time units occupied by the first bit information is 6, M is 2, X is 3, and L is 4. The padding bit information is high-order padding with 0. The first bit information is 101011, and the second bit information is 0111. The first bit information occupies 6 OFDM symbols, that is, 12 OOK symbols or 6 time units. The second bit information occupies 2 time units. The second bit information is repeated 3 times (that is, within a low-power signal, the low-power signal is repeatedly transmitted 3 times based on the non-OOK modulated bit information, that is, R1 is 3).

[0160] For example, the first bit information includes Manchester encoding, and the number of time units occupied by the first bit information is N, or or The number of time units occupied by the second bit of information is For example, such as Figure 9CAs shown, the second bit information includes the third bit information and the fourth bit information. The first bit information occupies 6 time units, M is 2, X is 3, and L is 4. The third bit information and the fourth bit information have the same log2L-[Xmodlog2L] bits (e.g., the first bit information). The first bit information is 101011, and the second bit information is 1011 (where the first to third bits are the fourth bit information, and the fourth bit is the third bit information). The first bit information occupies 6 OFDM symbols, that is, 12 OOK symbols or 6 time units. The second bit information occupies 2 time units. The second bit information is repeated 3 times (that is, within a low-power signal, the low-power signal is repeatedly transmitted 3 times based on the non-OOK modulated bit information, that is, R1 is 3).

[0161] It should be noted that the first transmission of a terminal identifier or a terminal subgroup identifier associated with a low-power signal within the low-power signal can also be referred to as the first repeated transmission. This application does not specifically limit this. The first repeated transmission of the low-power signal can also be referred to as the second transmission in actual transmission.

[0162] In step 802, the network device sends a low-power signal. Accordingly, terminal 1 and terminal 2 monitor the low-power signal.

[0163] For example, network devices can send low-power signals via broadcast, multicast, or unicast, without being specifically limited here. Figure 8 Let's take broadcasting as an example to illustrate.

[0164] Step 803A: Terminal 1 demodulates the low-power signal and determines whether to wake up the main receiver of Terminal 1 or whether to start PDCCH monitoring based on the low-power signal.

[0165] Step 803B: Terminal 2 demodulates the low-power signal and determines whether to wake up the main receiver of Terminal 2 or whether to start PDCCH monitoring based on the low-power signal.

[0166] For example, a low-power signal instructs terminal 1 to wake up and transmit information. If terminal 1's receiver is a receiver that only supports envelope detection, then terminal 1 can obtain the low-power signal instructing its main receiver to wake up by demodulating the first bit of information. If terminal 2's receiver is an OFDM receiver, then terminal 2 can obtain the low-power signal instructing its main receiver to wake up by demodulating the second bit of information.

[0167] In this application, the number of time units occupied by low-power signals based on coding and OOK modulation is an integer multiple of the number of time units occupied by non-OOK modulation. This can reduce the transmission of redundant resources, ensure the energy balance within OFDM symbols, and not increase the complexity of terminal detection of low-power signals, thus adapting to the needs of terminals that support different types of receivers.

[0168] In practical applications, the number of time units occupied by the bit information of the non-repeating low-power signal based on non-OOK modulation may also be an integer multiple of the number of time units occupied by the bit information of the low-power signal based on both encoding and OOK modulation. That is, the number of time units occupied by the second bit information is an integer multiple of the number of time units occupied by the first bit information. For example, if M is 2, X is 4, L is 2, and N is 2, the second bit information occupies 4 time units, and the first bit information occupies 2 time units.

[0169] Implementation Method 2: The number of time units occupied by the bit information of the low-power signal based on encoding and OOK modulation is not an integer multiple of the number of time units occupied by the bit information of the non-repeating low-power signal based on non-OOK modulation.

[0170] The following is combined Figure 10 The technical solution of this application will be described in detail with specific method embodiments. It should be noted that... Figure 10 This is a schematic flowchart illustrating an embodiment of the method of this application, showing the detailed communication steps or operations of the method. However, these steps or operations are merely examples, and other operations may be performed in the embodiments of this application. Figure 10 Variations of various operations within it. Furthermore, Figure 10 Each step in the process can be followed separately according to... Figure 10 The different orders presented may be executed, and it is possible that they are not intended to be executed. Figure 10 All operations within. This method executes as follows:

[0171] Step 1001: The network device determines a low-power signal, which includes a fifth bit, R sixth bits, and a seventh bit. The seventh bit is related to the sixth bit, or it is a padding bit. The number of time units occupied by the fifth bit is the same as the number of time units occupied by the R sixth bits and the seventh bit, where R is a positive integer.

[0172] It should be noted that step 1001 above is optional, and the low-power signal can also be pre-configured by the network device. Alternatively, the network device can retrieve the low-power signal from other devices. Refer to the description in section 801 above for clarification; further details will not be repeated here.

[0173] The fifth bit information is the low-power signal based on encoding and OOK modulation. Optionally, the fifth bit information is also based on rate matching and / or Manchester coded modulation. The sixth bit information is the low-power signal based on non-OOK modulation, and the sixth bit information is uncoded. Non-OOK modulation can be understood with reference to the description in 5) above, and will not be elaborated here. The fifth bit information is used to determine the terminal identifier or terminal subgroup identifier, and the sixth bit information is also used to determine the terminal identifier or terminal subgroup identifier. The terminal subgroup can also be understood as a terminal group. For example, if the terminal only supports an envelope detection receiver, the terminal identifier or terminal subgroup identifier can be obtained by demodulating the fifth bit information, thereby determining whether the network device is paged the terminal. If the terminal supports an OFDM receiver, the terminal identifier or terminal subgroup identifier can be obtained by demodulating the sixth bit information, thereby determining whether the network device is paged the terminal.

[0174] For example, the sixth bit information also includes padding bits, which are either the high bits or low bits of the sixth bit information. When the sixth bit information includes padding bits, the padding bits are not used to determine the terminal identifier or terminal subgroup identifier; the terminal only needs to demodulate the sixth bit information using the padding bits. For example, the network device indicates the value of L and the value of X to the terminal, and the network device indicates to the terminal that there are high-order padding bits in the sixth bit information, or the network device and the terminal agree that there are high-order padding bits in the sixth bit information when X / log2L is not an integer. Furthermore, if the network device indicates to the terminal that the padding method for the sixth bit information is method one (padding information is 0) as described in 6) above, or the network device indicates to the terminal the specific content of the padding information, then when the terminal demodulates the sixth bit information, if the sixth bit information is 01001, then the 0 in the first bit is not included in the terminal identifier or terminal subgroup identifier, and the 1001 in the second to fifth bits are used to determine the terminal identifier or terminal subgroup identifier. The amount of padding information is determined by X mod L.

[0175] The specific padding of the sixth bit can be understood by referring to the description in 6) above. For example, the sixth bit also includes the eighth bit (i.e., a type of padding bit information) and the ninth bit. The eighth bit and the ninth bit are identical for log2L - [X2modlog2L] bits, where X2 is the number of bits in the ninth bit, which is the sequence padding method described in method two of 6) above. The ninth bit indicates the terminal identifier or the terminal subgroup identifier (i.e., the terminal identifier or terminal subgroup identifier can be obtained by demodulating the fourth bit).

[0176] It is important to note that the aforementioned seventh bit information is introduced when the number of time units occupied by the low-power signal based on encoding and OOK modulation is not an integer equal to the number of time units occupied by the non-OOK modulated bit information, in order to ensure energy balance within the OFDM symbol. For example, if the fifth bit information occupies 5 time units and R sixth bits information occupies 4 time units, then the difference between the number of time units occupied by the fifth bit information and the number of time units occupied by the sixth bit information is 1. This difference of 1 time unit can be occupied by the seventh bit information.

[0177] In one possible implementation, the seventh bit is padding information, and the bit state of the padding information is 0 or 1. Alternatively, the network device may send a first indication information to the terminal, indicating the specific padding content of the seventh bit. The terminal can determine the bit state of the padding information based on the first indication information. For example, the bit state of the padding information may be one or more 0s or one or more 1s. The number of bits in the padding information is determined by the number of bits in the seventh bit. This is only an example and is not specifically limited.

[0178] The fifth bit of information occupies the same number of time units as the R sixth and seventh bits of information. For example, the fifth bit of information includes Manchester encoding, such as... Figure 11A As shown, the fifth bit occupies 5 time units, the sixth bit includes padding information and occupies 2 time units, the seventh bit occupies 1 time unit, and the bit state of the padding information corresponding to the seventh bit is 0. M is 2, X is 5, L is 8, R is 2, the padding information in the sixth bit is high-order padding 0, the fifth bit is 10101, the sixth bit is 011110, the fifth bit occupies 5 OFDM symbols, that is, 10 OOK symbols or 5 time units, the sixth bit occupies 2 OFDM symbols, the sixth bit is repeated twice (that is, within a low-power signal, the low-power signal is repeatedly transmitted twice based on non-OOK modulated bit information), and the seventh bit is 000.

[0179] The fifth bit of information occupies the same number of time units as the R sixth and seventh bits of information. For example, the fifth bit of information includes Manchester encoding, such as... Figure 11BAs shown, the fifth bit information occupies 5 time units. The sixth bit information does not include padding bits. The R sixth bits and the seventh bit information occupy 5 time units. The bit state of the padding bits corresponding to the seventh bit information is 0. M is 2, X is 3, L is 4, R is 3, the fifth bit information is 10101, the sixth bit information is 111, the fifth bit information occupies 5 OFDM symbols, that is, 10 OOK symbols or 5 time units, the sixth bit information is transmitted 3 times (that is, within a low-power signal, the low-power signal is transmitted 3 times based on non-OOK modulated bit information), and the seventh bit information is 0.

[0180] In another possible implementation, the seventh bit is related to the sixth bit, and the seventh bit is identical to the sixth bit in P bits, where P is the number of bits in the seventh bit. For example, if the sixth bit is 111101, L is 8, P is 1, and the seventh bit is 101. Alternatively, the seventh bit can be different from the sixth bit; for example, if the sixth bit is 1100, the seventh bit could be 11.

[0181] The fifth bit of information occupies the same number of time units as the R sixth and seventh bits of information. For example, the fifth bit of information includes Manchester encoding, such as... Figure 12A As shown, the fifth bit occupies 5 time units. The sixth bit includes the eighth and ninth bits. The eighth and ninth bits are identical for log2L - [X2 modlog2L] bits. The sixth bit occupies 2 time units, and the seventh bit occupies 1 time unit. M is 2, X is 3, L is 4, R is 2, the fifth bit is 10101, and the sixth bit is 0111 (where the first to third bits are the ninth bit and the fourth bit is the eighth bit). The fifth bit occupies 5 OFDM symbols, i.e., 10 OOK symbols or 5 time units. The sixth bit occupies 2 time units and is transmitted twice (i.e., within a low-power signal, the low-power signal is transmitted twice based on non-OOK modulation bit information). The seventh bit is identical to the sixth bit for P bits, which is the 0 and 1 in the sixth bit.

[0182] The fifth bit of information occupies the same number of time units as the R sixth and seventh bits of information. For example, the fifth bit of information includes Manchester encoding, such as... Figure 12BAs shown, the fifth bit information occupies 5 time units. The sixth bit information does not include padding bits. The R sixth bits and the seventh bit information occupy 5 time units. M is 2, X is 3, L is 4, R is 3. The fifth bit information is 10101, and the sixth bit information is 111. The fifth bit information occupies 5 OFDM symbols, that is, 10 OOK symbols or 5 time units. The sixth bit information is transmitted 3 times (that is, within a low-power signal, the low-power signal is transmitted 3 times based on non-OOK modulated bit information). The seventh bit information is the same as 1 bit of the sixth bit information, that is, 1 in the sixth bit information.

[0183] In step 1002, the network device sends a low-power signal. Accordingly, terminal 1 and terminal 2 monitor the low-power signal.

[0184] For example, network devices can send low-power signals via broadcast, multicast, or unicast, without being specifically limited here. Figure 10 Let's take broadcasting as an example to illustrate.

[0185] Step 1003A: Terminal 1 demodulates the low-power signal and determines whether to wake up the main receiver of Terminal 1 based on the low-power signal, or determines whether Terminal 1 starts monitoring PDCCH at a certain moment in the candidate time.

[0186] Step 1003B: Terminal 2 demodulates the low-power signal and determines whether to wake up the main receiver of Terminal 2 based on the low-power signal, or determines whether Terminal 2 starts monitoring PDCCH at a certain moment in the candidate time.

[0187] For example, a low-power signal indicates that terminal 1 should be woken up to transmit information. If the receiver of terminal 1 is a receiver that only supports envelope detection, then terminal 1 can obtain the low-power information indicating that its main receiver should be woken up by demodulating the fifth bit of information. If the receiver of terminal 2 is an OFDM receiver, then terminal 2 can obtain the low-power information indicating that its main receiver should be woken up by demodulating the sixth bit of information.

[0188] Based on this, the transmission of redundant resources can be reduced, the energy balance within OFDM symbols can be guaranteed, and the complexity of terminal detection of low-power signals can be increased without increasing the complexity of terminal detection, thus adapting to the needs of terminals that support different types of receivers.

[0189] Implementation Method 3: The number of bits carried by the time unit of the low-power signal based on encoding and OOK modulation through non-OOK modulation is an integer multiple of the number of bits of the non-repeating low-power signal based on non-OOK modulation.

[0190] The following is combined Figure 13The technical solution of this application will be described in detail with specific method embodiments. It should be noted that... Figure 13 This is a schematic flowchart illustrating an embodiment of the method of this application, showing the detailed communication steps or operations of the method. However, these steps or operations are merely examples, and other operations may be performed in the embodiments of this application. Figure 13 Variations of various operations within it. Furthermore, Figure 13 Each step in the process can be followed separately according to... Figure 13 The different orders presented may be executed, and it is possible that they are not intended to be executed. Figure 13 All operations within. This method executes as follows:

[0191] Step 1301: The network device determines a low-power signal, which includes a tenth bit of information and R2 eleventh bits of information. The time unit occupied by the tenth bit of information is modulated by a non-on keying, and the number of bits carried is an integer multiple of the number of bits of the eleventh bit of information. R2 is a positive integer.

[0192] It should be noted that step 1301 above is optional; the low-power signal can also be pre-configured by the network device. Alternatively, the network device can retrieve the low-power signal from another device. Refer to the description in section 801 above for clarification; further details will not be repeated here.

[0193] The tenth bit information is the low-power signal based on encoding and OOK modulation. Optionally, the tenth bit information is also based on rate matching and / or Manchester coded modulation. The eleventh bit information is the low-power signal based on non-OOK modulation. The eleventh bit information is unencoded. The non-OOK modulation can be understood with reference to the description in section 5) above, and will not be elaborated here. The tenth bit information is used to determine the terminal identifier or terminal subgroup identifier, and the eleventh bit information is also used to determine the terminal identifier or terminal subgroup identifier. The terminal subgroup can also be understood as a terminal group. For example, if the terminal only supports envelope detection, the receiver can obtain the terminal identifier or terminal subgroup identifier by demodulating the tenth bit information, and thus determine whether the network device is paged the terminal. If the terminal supports OFDM, the receiver can obtain the terminal identifier or terminal subgroup identifier by demodulating the eleventh bit information, and thus determine whether the network device is paged the terminal.

[0194] One time unit typically refers to an OOK ON time unit.

[0195] In this context, the time unit occupied by the tenth bit of information carries a number of bits that are an integer multiple of the number of bits in the eleventh bit of information, achieved through non-on keying modulation. For example, as shown... Figure 14As shown, the tenth bit of information includes Manchester encoding. The tenth bit occupies six time units, each carrying 2 bits of information (i.e., L=4). These six time units have six "on" states, allowing a total of 12 bits of information to be carried through non-on keying modulation. The eleventh bit of information has three bits (e.g., 101). The eleventh bit is transmitted six times (i.e., R2 is 6).

[0196] The eleventh bit indicates only one terminal identifier or terminal subgroup identifier.

[0197] It should be noted that the first transmission of a terminal identifier or a terminal subgroup identifier associated with a low-power signal within the low-power signal can also be referred to as the first repeated transmission. This application does not specifically limit this. The first repeated transmission of the low-power signal can also be referred to as the second transmission in actual transmission.

[0198] In step 1302, the network device sends a low-power signal. Accordingly, terminal 1 and terminal 2 monitor the low-power signal.

[0199] For example, network devices can send low-power signals via broadcast, multicast, or unicast, without being specifically limited here. Figure 13 Let's take broadcasting as an example to illustrate.

[0200] Step 1303A: Terminal 1 demodulates the low-power signal and determines whether to wake up the main receiver of Terminal 1 based on the low-power signal, or determines whether Terminal 1 starts monitoring PDCCH at a certain moment in the candidate time.

[0201] Step 1303B: Terminal 2 demodulates the low-power signal and determines whether to wake up the main receiver of Terminal 2 based on the low-power signal, or determines whether Terminal 2 starts monitoring PDCCH at a certain moment in the candidate time.

[0202] For example, a low-power signal instructs terminal 1 to wake up and transmit information. If terminal 1's receiver is a receiver that only supports envelope detection, then terminal 1 can obtain the low-power signal instructing its main receiver to wake up by demodulating the tenth bit of information. If terminal 2's receiver is an OFDM receiver, then terminal 2 can obtain the low-power signal instructing its main receiver to wake up by demodulating the eleventh bit of information.

[0203] In this application, the number of bits in the low-power signal shoelace based on encoding and OOK modulation is an integer multiple of the number of bits carried by non-OOK modulation, which can reduce the transmission of redundant resources, ensure the energy balance within the OFDM symbol, and not increase the complexity of terminal detection of low-power signals, thus adapting to the needs of terminals that support different types of receivers.

[0204] The foregoing primarily describes the solutions provided by the embodiments of this application from the perspective of device interaction. It is understood that, in order to achieve the above functions, each device may include corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should readily recognize that, in conjunction with the units and algorithm steps of the various examples described in the embodiments disclosed herein, the embodiments of this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by 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 this application.

[0205] The embodiments of this application can divide the device into functional units according to the above method examples. For example, each function can be divided into a separate functional unit, or two or more functions can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0206] When using integrated units, Figure 15 A possible exemplary block diagram of the communication device involved in an embodiment of this application is shown. For example... Figure 15 As shown, the communication device 1500 may include a processing unit 1501 and a transceiver unit 1502. The processing unit 1501 is used to control and manage the operation of the communication device 1500. The transceiver unit 1502 is used to support communication between the communication device 1500 and other devices. Optionally, the transceiver unit 1502 may include a receiving unit and / or a transmitting unit, respectively used to perform receiving and transmitting operations. Optionally, the communication device 1500 may also include a storage unit for storing the program code and / or data of the communication device 1500. The transceiver unit may be referred to as an input / output unit, a communication unit, etc., and may be a transceiver; the processing unit may be a processor. When the communication device is a module (e.g., a chip) in a communication device, the transceiver unit may be an input / output interface, an input / output circuit, or an input / output pin, etc., and may also be referred to as an interface, a communication interface, or an interface circuit, etc.; the processing unit may be a processor, a processing circuit, or a logic circuit, etc. Specifically, the communication device may be the aforementioned terminal, network device, etc.

[0207] In addition, such as Figure 16 The diagram shown is a simplified structural schematic of a terminal provided in this application. For ease of understanding and illustration, Figure 16 In this context, the terminal is taken as a mobile phone as an example. For example... Figure 16 As shown, the terminal includes a processor, memory, radio frequency circuitry, antenna, and input / output devices.

[0208] The processor is mainly used to process communication protocols and communication data, control terminals, execute software programs, and process data from software programs.

[0209] Memory is mainly used to store software programs and data.

[0210] Radio frequency (RF) circuits are mainly used for the conversion between baseband signals and RF signals, as well as for the processing of RF signals.

[0211] Antennas are primarily used for transmitting and receiving radio frequency signals in the form of electromagnetic waves.

[0212] Input / output devices, such as touchscreens, displays, and keyboards, are primarily used to receive user input data and output data to the user.

[0213] It should be noted that some types of terminals may not have input / output devices.

[0214] When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs the baseband signal to the radio frequency (RF) circuit. The RF circuit then processes the baseband signal and transmits it outward as electromagnetic waves through the antenna. When data is sent to the terminal, the RF circuit receives the RF signal through the antenna, converts it into a baseband signal, and outputs the baseband signal to the processor. The processor then converts the baseband signal back into data and processes it.

[0215] For ease of explanation, Figure 16 Only one memory and processor are shown in the illustration. In actual end products, there may be one or more processors and one or more memories. Memory may also be called storage medium or storage device, etc. Memory may be set up independently of the processor or integrated with the processor; this application does not limit this.

[0216] In the embodiments of this application, the antenna and radio frequency circuit with transceiver function can be regarded as the transceiver unit of the terminal, and the processor with processing function can be regarded as the processing unit of the terminal.

[0217] like Figure 16 As shown, terminal 1600 includes a transceiver unit 1610 and a processing unit 1620. The transceiver unit 1610 can also be referred to as a transceiver, transceiver device, or transceiver unit. The processing unit 1620 can also be referred to as a processor, processing board, processing module, or processing device.

[0218] Optionally, the devices in transceiver unit 1610 used for receiving functions can be considered as receiving units, and the devices in transceiver unit 1610 used for transmitting functions can be considered as transmitting units. That is, transceiver unit 1610 includes both receiving and transmitting units. A transceiver unit may also be called a transceiver, transceiver circuit, etc. A receiving unit may also be called a receiver, receiver, or receiving circuit, etc. A transmitting unit may also be called a transmitter, transmitter, or transmitting circuit, etc.

[0219] It should be understood that the transceiver unit 1610 is used to perform the sending and receiving operations of the terminal in the above method embodiment, and the processing unit 1620 is used to perform other operations on the terminal in the above method embodiment besides the sending and receiving operations.

[0220] When the terminal is a chip, the chip includes a transceiver unit and a processing unit (processor). The transceiver unit can be an input / output circuit or a communication interface, such as an I / O interface; the processing unit is a processor, microprocessor, integrated circuit, or logic circuit integrated on the chip. The transceiver unit, processing unit, and memory can be integrated into a first chip, such as a modem or a system-on-a-chip (SoC). Radio frequency (RF) circuitry can be located in a second chip, such as an RF front-end.

[0221] This application also provides a network device. For example... Figure 17 The diagram shown is a structural schematic of a network device 1700 provided in an embodiment of this application. This network device 1700 can be applied to, for example... Figure 1 In the system shown, for example, network device 1700 can be Figure 1 The network devices in the system are used to perform the functions of the network devices in the above method embodiments. It should be understood that the following are merely examples, and in future communication systems, network devices may have other forms and configurations.

[0222] For example, in a 5G communication system, network equipment 1700 may include CU, DU, and AAU, compared to network equipment in an LTE communication system which consists of one or more radio frequency units, such as remote radio units (RRUs), and one or more building baseband units (BBUs).

[0223] The non-real-time portion of the original BBU will be separated and redefined as CU, responsible for handling non-real-time protocols and services. Some physical layer processing functions of the BBU, along with the original RRU and passive antenna, will be merged into AAU. The remaining functions of the BBU will be redefined as DU, responsible for handling physical layer protocols and real-time services. In short, CU and DU are distinguished by the real-time nature of the processed content, and AAU is a combination of RRU and antenna.

[0224] CU, DU, and AAU can be installed separately or together, resulting in various network deployment configurations. One possible deployment configuration is as follows: Figure 17 As shown, consistent with traditional 4G network equipment, the CU and DU share the same hardware deployment. It should be understood that... Figure 17 This is just an example and does not limit the scope of protection of this application. For example, the deployment form can also be DU deployed in BBU data center, CU centrally deployed, or DU centrally deployed and CU centrally deployed at a higher level, etc.

[0225] The AAU1800 can perform send and receive functions and Figure 15 The transceiver unit 1502 corresponds to this. Optionally, the AAU800 can also be called a transceiver, transceiver circuit, or transceiver, etc., and it may include at least one antenna 1801 and radio frequency unit 1802. Optionally, the AAU1800 may include a receiving unit and a transmitting unit, the receiving unit may correspond to a receiver (or receiver circuit), and the transmitting unit may correspond to a transmitter (or transmitter circuit). The CU and DU1900 can realize internal processing functions and Figure 15 The processing unit 1501 corresponds to this. Optionally, the CU and DU1900 can control network devices and can be referred to as controllers. The AAU can be physically set together with the CU and DU, or they can be physically set separately.

[0226] In addition, network equipment is not limited to Figure 17 The form shown can also be other forms: for example, including a BBU and an adaptive radio unit (ARU), or including a BBU and an AAU; it can also be a customer premises equipment (CPE), or other forms, which are not limited in this application.

[0227] In one example, the CU and DU1900 can be composed of one or more single boards. Multiple single boards can collectively support a single access standard wireless access network (such as an LTE network), or they can each support different access standards wireless access networks (such as LTE, 5G, future networks, or other networks). The CU and DU1900 also 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, such as controlling the network device to execute the operation procedures related to the network device in the above method embodiments. The memory 1901 and processor 1902 can serve one or more single boards. That is, each single board can have its own memory and processor, or multiple single boards can share the same memory and processor. Furthermore, each single board can also have necessary circuitry.

[0228] It should be understood that Figure 17 The network device 1700 shown can achieve Figure 8 or Figure 10 or Figure 13 The network device functions involved in the method embodiments are described below. The operation and / or function of each unit in the network device 1700 are respectively for implementing the corresponding processes executed by the network device in the method embodiments of this application. To avoid repetition, detailed descriptions are appropriately omitted here. Figure 17 The network device structure shown in the example is only one possible configuration and should not be construed as limiting the embodiments of this application. This application does not exclude the possibility of other network device structures that may appear in the future.

[0229] The CU and DU1900 described above can be used to perform the actions implemented internally by the network device as described in the preceding method embodiments, while the AAU1800 can be used to perform the actions described in the preceding method embodiments whereby the network device sends data to or receives data from the terminal. Please refer to the descriptions in the preceding method embodiments for details, which will not be repeated here.

[0230] This application also provides a communication system, which includes a terminal and a network device. The terminal is used to perform the above-described... Figure 8 or Figure 10 or Figure 13 The illustrated embodiments show all or part of the steps performed by the terminal. The network device is used to perform... Figure 8 or Figure 10 or Figure 13 The network device performs all or part of the steps shown in the embodiments.

[0231] Based on the above embodiments, this application also provides a computer-readable storage medium storing instructions that, when executed, cause the methods 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 various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory, a random access memory, a magnetic disk, or an optical disk.

[0232] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this 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, etc.) containing computer-usable program code.

[0233] This application is described with reference to flowchart illustrations and / or block diagrams of the methods, apparatus (systems), and computer program products according to this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations 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, special-purpose computer, embedded processor, or other programmable data processing device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing device, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0234] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0235] These computer program instructions can also be loaded onto a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable device for implementing the process. Figure 1 One or more processes and / or boxes Figure 1The steps of the function specified in one or more boxes.

Claims

1. A communication method, characterized in that, include: Send a low-power signal, the low-power signal including a first bit of information and R1 second bits of information, wherein the number of time units occupied by the first bit of information is an integer multiple of the number of time units occupied by the second bit of information, and R1 is a positive integer.

2. A communication method, characterized in that, include: The low-power signal is monitored. The low-power signal includes a first bit of information and R1 second bits of information, wherein the number of time units occupied by the first bit of information is an integer multiple of the number of time units occupied by the second bit of information, and R1 is a positive integer.

3. The method according to claim 1 or 2, characterized in that, The first bit information is based on on-off keyed OOK modulation, and the second bit information is based on non-OOK modulation.

4. The method according to claim 3, characterized in that, The non-OOK modulation includes one or more of the following: representing different bit states of the second bit information through different sequences, representing different bit states of the second bit information through different phases, representing different bit states of the second bit information through different cyclic shifts of the same sequence, or representing different bit states of the second bit information through different root sequences.

5. The method according to any one of claims 1-4, characterized in that, The first bit information is used to determine the terminal identifier or the terminal subgroup identifier, and the second bit information is used to determine the terminal identifier or the terminal subgroup identifier.

6. The method according to any one of claims 1-5, characterized in that, The second bit information also includes padding bit information.

7. The method according to any one of claims 1-6, characterized in that, The number of time units occupied by the first bit information is N, or or The number of time units occupied by the second bit information is N is the number of bits in the first bit information, M is the number of OOK symbols included in an OFDM symbol, L is the number of candidate sequences, and X is the number of bits in the second bit information, wherein N, M, L, and X are positive integers.

8. The method according to any one of claims 1-7, characterized in that, The second bit information also includes a third bit information and a fourth bit information. The third bit information is the same as log2L-[X1modlog2L] bits of the fourth bit information. The fourth bit information indicates the terminal identifier or the terminal subgroup identifier. L is the number of candidate sequences, and X1 is the number of bits in the fourth bit information.

9. A communication method, characterized in that, include: Send a low-power signal, the low-power signal including a fifth bit, R sixth bits, and a seventh bit, wherein the seventh bit is related to the sixth bit, or the seventh bit is a padding bit, the number of time units occupied by the fifth bit is the same as the number of time units occupied by the R sixth bits and the seventh bit, and R is a positive integer.

10. A communication method, characterized in that, include: The low-power signal is monitored. The low-power signal includes a fifth bit, R sixth bits, and a seventh bit. The seventh bit is related to the sixth bit, or it is a padding bit. The number of time units occupied by the fifth bit is the same as the number of time units occupied by the R sixth bits and the seventh bit. R is a positive integer.

11. The method according to claim 9 or 10, characterized in that, The fifth bit is used to determine the terminal identifier or the terminal subgroup identifier, and the sixth bit is used to determine the terminal identifier or the terminal subgroup identifier.

12. The method according to any one of claims 9-11, characterized in that, The seventh bit information is different from the sixth bit information.

13. The method according to any one of claims 9-12, characterized in that, The seventh bit information is related to the sixth bit information and includes: The seventh bit information is identical to P bits of the sixth bit information, where P is the number of bits in the seventh bit information.

14. The method according to any one of claims 9-13, characterized in that, The bit state of the filling bit information is 0 or 1.

15. The method according to claim 9, characterized in that, The method further includes: Send a first indication message, which is used to determine the bit state of the filling bit information.

16. The method according to any one of claims 9-15, characterized in that, The sixth bit information includes the eighth bit information and the ninth bit information. The eighth bit information is the same as log2L-[X2 modlog2L] bits of the ninth bit information. The ninth bit information indicates the terminal identifier or the terminal subgroup identifier. L is the number of candidate sequences, and X2 is the number of bits in the ninth bit information.

17. A communication method, characterized in that, include: A low-power signal is transmitted, the low-power signal including a tenth bit of information and R2 eleventh bits of information, wherein the time unit occupied by the tenth bit of information is modulated by a non-on keying and the number of bits carried is an integer multiple of the number of bits of the eleventh bit of information, and R2 is a positive integer.

18. A communication method, characterized in that, include: The low-power signal is monitored. The low-power signal includes a tenth bit and R2 eleventh bits. The number of bits carried by the time unit occupied by the tenth bit through non-on keying modulation is an integer multiple of the number of bits of the eleventh bit. R2 is a positive integer.

19. The method according to claim 17 or 18, characterized in that, The tenth bit information is based on on-off keyed OOK modulation, and the eleventh bit information is based on non-OOK modulation.

20. The method according to claim 19, characterized in that, The non-OOK modulation includes one or more of the following: representing different bit states of the eleventh bit information through different sequences, representing different bit states of the eleventh bit information through different phases, representing different bit states of the eleventh bit information through different cyclic shifts of the same sequence, or representing different bit states of the eleventh bit information through different root sequences.

21. The method according to any one of claims 18-20, characterized in that, The tenth bit is used to determine the terminal identifier or the terminal subgroup identifier, and the eleventh bit is used to determine the terminal identifier or the terminal subgroup identifier.

22. A communication device, characterized in that, include: At least one processor; Used to run part or all of a computer program or data so that the method of any one of claims 1-21 is performed.

23. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions that, when executed by a computer, cause the method as described in any one of claims 1-21 to be performed.

24. A computer program product comprising a computer program or instructions, characterized in that, When the computer program or instructions are run on a computer, the method as described in any one of claims 1-21 is performed.

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