Communication method and communication apparatus

Abstract

The present application provides a communication method and a communication apparatus. The communication method comprises: on the basis of the terminal type of a terminal device, receiving a wake-up signal by means of a corresponding wake-up signal reception occasion. When the terminal type of the terminal device is a first type, the starting time of the wake-up signal reception occasion is the starting time of a monitoring occasion of the wake-up signal, and the wake-up signal comprises a preamble and a data portion. When the terminal type of the terminal device is not the first type, the wake-up signal reception occasion starts after the length of time of the preamble has passed from the starting time of the monitoring occasion of the wake-up signal, the first type being a type of receiving the wake-up signal by means of envelope detection, the preamble being used for time-frequency synchronization, and the data portion carrying wake-up information. According to the technical solution provided in the present application, wake-up signals are received by means of different reception occasions at the granularity of terminal types, thereby reducing system resource overhead.

Description

Communication method and communication apparatus

[0001] This application claims priority to the Chinese Patent Application No. 202410458443.9, filed on April 16, 2024, and entitled "Communication method and communication apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communications, and more particularly, to a communication method and a communication apparatus. BACKGROUND

[0003] To reduce the power consumption of terminal devices, the 3rd generation partnership project (3GPP) introduced a low power wake-up signal (LP-WUS) / low power wake-up receiver (LP-WUR) research topic in the NR Rel-18 / 19 version, with the aim of studying power reduction solutions that enable terminal devices to operate in various states, including connected state, idle state, and inactive state.

[0004] At the present stage, to improve the reception performance of the LP-WUS and meet the time-frequency synchronization requirements of the LP-WUR, a preamble is attached before each LP-WUS signal. However, the preamble itself does not carry LP-WUS information and is a system signaling overhead. Therefore, the wake-up signal at the present stage can cause waste of system resources. SUMMARY

[0005] The present application provides a communication method and a communication apparatus for reducing unnecessary system overhead.

[0006] In a first aspect, an embodiment of the present application provides a communication method, which can be executed by a terminal device, or can also be executed by a module in the terminal device, such as a chip system or a circuit, or can also be executed by a logic node, a logic module or software that can realize all or part of the functions of the terminal device, and the present application does not make any limitation in this regard.

[0007] The method comprises: receiving a wake-up signal according to a terminal type of the terminal device through a corresponding wake-up signal receiving occasion, wherein when the terminal type of the terminal device is a first type, a starting time of the wake-up signal receiving occasion is a starting time of a monitoring occasion of the wake-up signal, the wake-up signal comprises a preamble and a data part, when the terminal type of the terminal device is not the first type, the wake-up signal receiving occasion is a time length of the preamble after the starting time of the monitoring occasion of the wake-up signal, the first type is a type of receiving the wake-up signal through envelope detection, the preamble is used for time-frequency synchronization, and the data part carries wake-up information.

[0008] It should be understood that if the terminal type of the terminal device is the first type, the terminal device can receive the wake-up signal comprising the preamble and the data part (or payload) based on the monitoring occasion of the wake-up signal; if the terminal type of the terminal device is not the first type, the terminal device can receive the wake-up signal after skipping the time length of the preamble based on the monitoring occasion of the wake-up signal. In this way, the terminal device of the first type can perform time-frequency synchronization through the preamble in the wake-up signal, and regardless of the format of the wake-up signal, the terminal device of the non-first type only receives the data part without the preamble.

[0009] In the above technical solution, on the one hand, since there is no preamble, the false alarm probability of the terminal device of the first type misjudging the wake-up signal without the preamble or the short wake-up signal can be reduced. On the other hand, the starting detection time position of the terminal device of the non-first type for the wake-up signal with the preamble and the wake-up signal without the preamble is unified, or regardless of whether the wake-up signal comprises the preamble, the terminal device of the non-first type only detects the data part or the payload part. Thus, for terminal devices of different types, no additional wake-up signal detection mechanism is introduced.

[0010] In combination with the first aspect, in a possible implementation manner of the first aspect, the ON symbol of the data part is generated through a cover sequence.

[0011] Optionally, the cover sequence can be an all-1 sequence with a length of N, a complex sequence with a length of N, a Zadoff-Chu (ZC) sequence, a binary pseudo-random sequence (such as an m sequence, a gold sequence, etc.), or a quadrature phase shift keying (QPSK) sequence, etc.

[0012] In the above technical solution, on the one hand, the anti-interference ability of the way of performing coherent detection on the cover sequence to receive the wake-up signal is stronger, the receiving performance is better, and a larger coverage range can be supported; on the other hand, the cover sequence can indicate part or all of the information in the wake-up information through the information carrying multiple bits.

[0013] Optionally, the data portion can include all of the wake-up information and be generated by the cover sequence, and the cover sequence used to generate at least half of the ON symbols in the data portion can carry the wake-up signal.

[0014] Optionally, the data portion can include part of the wake-up information. For example, the ON symbols of the part of the wake-up information are generated by the cover sequence, and the cover sequence carries the complete wake-up information. For another example, the combination of the ON symbols of the part of the wake-up information and the cover sequence used to generate the ON symbols of the part of the wake-up information is used to carry the complete wake-up information.

[0015] With reference to the first aspect, in a possible implementation manner of the first aspect, when the terminal type is not the first type, the terminal type is a second type, and the second type is a type of receiving the wake-up signal by means of coherent detection on the cover sequence.

[0016] In the above technical solution, in the terminal device of the second type, the receiver that receives the wake-up signal by means of the above coherent detection can be referred to as an OFDM receiver or a sequence receiver. Compared with the first type that uses envelope detection to receive the wake-up information, the anti-interference capability is stronger, the receiving performance is better, and a larger coverage range can be supported.

[0017] The second aspect, the embodiments of the present application provide a communication method, which can be executed by a terminal device, or can also be executed by a module such as a chip system or a circuit in the terminal device, or can also be executed by a logic node, a logic module or software that can realize all or part of the functions of the terminal device, and the present application does not limit this.

[0018] The method comprises: receiving a wake-up signal according to a terminal type of the terminal device through a corresponding wake-up signal detection duration, wherein when the terminal type of the terminal device is a first type, the wake-up signal detection duration is a first length, when the terminal type of the terminal device is not the first type, the wake-up signal detection duration is less than the first length, the wake-up signal comprises a preamble and a data portion, the first type is a type of receiving the wake-up signal by means of envelope detection, the preamble is used for time-frequency synchronization, and the data portion carries wake-up information.

[0019] It should be understood that if the terminal type of the terminal device is the first type, the terminal device can receive a signal of the first length based on the wake-up signal detection duration of the first length; if the terminal type of the terminal device is not the first type, the terminal device can receive a signal of the second length based on the wake-up signal detection duration of the second length, wherein the second length is less than the first length. In this way, the length of the signal received by the terminal device of the non-first type is shorter, and part of the overhead is saved.

[0020] In the technical solution, on the one hand, the format of the wake-up signal is unified, that is, both include a preamble and a data part. On the other hand, the length of the signal received by the terminal device of the non-first type is shorter.

[0021] With reference to the second aspect, in a possible implementation manner of the second aspect, the ON symbol in the preamble is generated by an overlay sequence.

[0022] With reference to the second aspect, in a possible implementation manner of the second aspect, the ON symbol in the data part is generated by an overlay sequence.

[0023] For specific schemes and beneficial effects of the overlay sequence and the data part, refer to the description of the first aspect.

[0024] With reference to the second aspect, in a possible implementation manner of the second aspect, when the terminal type is not the first type, the terminal type is the second type, and the second type is a type of receiving the wake-up signal by coherent detection on the overlay sequence.

[0025] For the beneficial effects of the second type, refer to the description of the first aspect.

[0026] In a third aspect, an embodiment of the present application provides a communication method, which can be executed by a network device, or can be executed by a module such as a chip system or a circuit in the network device, or can be executed by a logic node, a logic module or software capable of realizing all or part of the functions of the network device, and the present application does not make any limitation in this regard.

[0027] The method comprises: generating a corresponding wake-up signal according to a terminal type, wherein when the terminal type includes a first type, the wake-up signal includes a preamble and a data part, when the terminal type does not include the first type, the wake-up signal includes the data part but does not include the preamble, the first type is a type of receiving the wake-up signal by envelope detection, the preamble is used for time-frequency synchronization, and the data part carries wake-up information; and sending the wake-up signal to a terminal device.

[0028] It should be understood that the network device needs to wake up a single terminal device, or a group of terminal devices (including multiple terminal devices), and the terminal types of the multiple terminal devices can include the first type, the second type or other types. The terminal type according to which the network device generates the wake-up signal is the type corresponding to the terminal device or terminal devices that the network device needs to wake up.

[0029] In the technical solution, the network device generates the wake-up signal in the granularity of terminal type. When the terminal type includes the first type, the terminal device of the first type needs a preamble to realize time-frequency synchronization, and therefore the wake-up signal generated by the network device includes the data part of the preamble. When the terminal type does not include the first type, the terminal device of the second type or other types can acquire time-frequency synchronization by other manners, such as using the secondary synchronization signal / primary synchronization signal (SSS / PSS) in the synchronization signal / PBCH block (SSB) of the existing NR system, and therefore the wake-up signal generated by the network device can not include the preamble but only include the data part.

[0030] In the technical solution, the network device reduces the sending scenario of the preamble and reduces the resource overhead caused by the preamble. When the network device does not send the preamble, the part of time-frequency resources can be left for other NR downlink data and signaling transmission.

[0031] In combination with the third aspect, in a possible implementation manner of the third aspect, when the terminal type does not include the first type, the sending of the wake-up signal to the terminal device includes: sending the wake-up signal to the terminal device after the monitoring occasion of the wake-up signal and after the time length of the preamble.

[0032] In the technical solution, the data part sending positions of the wake-up signals with and without the preamble are unified, and no additional wake-up signal detection mechanism is introduced for the terminal device of the first type and the terminal device of the second type or other types.

[0033] In combination with the third aspect, in a possible implementation manner of the third aspect, the ON symbol of the data part is generated by a cover sequence.

[0034] For specific schemes and beneficial effects of the cover sequence and the data part, refer to the description of the first aspect.

[0035] In the fourth aspect, an embodiment of the present application provides a communication method, which can be executed by a network device, or can be executed by a module such as a chip system or a circuit in the network device, or can be executed by a logic node, a logic module or software capable of realizing all or part of the functions of the network device, and the present application does not make any limitation in this regard.

[0036] The method comprises: generating a corresponding wake-up signal according to a terminal type, wherein when the terminal type comprises a first type, a time length of the wake-up signal is a first length, when the terminal type does not comprise the first type, the time length of the wake-up signal is less than the first length, the wake-up signal comprises a preamble and a data part, the first type is a type of receiving the wake-up signal through envelope detection, the preamble is used for time-frequency synchronization, and the data part carries wake-up information; and sending the wake-up signal to a terminal device.

[0037] In the technical solution, the network device generates the wake-up signal according to the terminal type. When the terminal type comprises the first type, the time length of the generated wake-up signal is greater than that when the terminal type does not comprise the first type. In addition, the signal format of the wake-up signal is unified, that is, the wake-up signal comprises the preamble and the data part.

[0038] In the technical solution, the network device reduces the time length of the wake-up signal, and reduces the resource cost of the wake-up signal. The saved part of the time-frequency resource can be left for other NR downlink data and signaling transmission.

[0039] With reference to the fourth aspect, in a possible implementation manner of the fourth aspect, the ON symbol in the preamble is generated through a cover sequence.

[0040] With reference to the fourth aspect, in a possible implementation manner of the fourth aspect, the ON symbol in the data part is generated through a cover sequence.

[0041] For specific schemes and beneficial effects of the cover sequence and the data part, refer to the description of the first aspect.

[0042] In the fifth aspect, an embodiment of the present application provides a communication device, comprising: a transceiver unit, configured to receive a wake-up signal through a corresponding wake-up signal receiving occasion according to a terminal type of the terminal device, wherein when the terminal type of the terminal device is a first type, a starting time of the wake-up signal receiving occasion is a starting time of a monitoring occasion of the wake-up signal, the wake-up signal comprises a preamble and a data part, when the terminal type of the terminal device is not the first type, the wake-up signal receiving occasion is a time length of the preamble after the starting time of the monitoring occasion of the wake-up signal, the first type is a type of receiving the wake-up signal through envelope detection, the preamble is used for time-frequency synchronization, and the data part carries wake-up information.

[0043] With reference to the fifth aspect, in a possible implementation manner of the fifth aspect, the ON symbol in the data part is generated through a cover sequence.

[0044] With reference to the fifth aspect, in a possible implementation manner of the fifth aspect, when the terminal type is not the first type, the terminal type is a second type, and the second type is a type of receiving the wake-up signal by performing coherent detection on a cover sequence.

[0045] The explanation and beneficial effects of the communication apparatus provided in the fifth aspect can refer to those of the communication method in the first aspect, which will not be repeated here.

[0046] In the sixth aspect, the embodiments of the present application provide a communication apparatus, which comprises: a transceiver unit, configured to receive a wake-up signal according to a terminal type of a terminal device through a corresponding wake-up signal detection duration, wherein when the terminal type of the terminal device is a first type, the wake-up signal detection duration is a first length, when the terminal type of the terminal device is not the first type, the wake-up signal detection duration is less than the first length, the wake-up signal comprises a preamble and a data part, the first type is a type of receiving the wake-up signal by envelope detection, the preamble is used for time-frequency synchronization, and the data part carries wake-up information.

[0047] With reference to the sixth aspect, in a possible implementation manner of the sixth aspect, an ON symbol in the preamble is generated by a cover sequence.

[0048] With reference to the sixth aspect, in a possible implementation manner of the sixth aspect, an ON symbol in the data part is generated by a cover sequence.

[0049] With reference to the sixth aspect, in a possible implementation manner of the sixth aspect, when the terminal type is not the first type, the terminal type is a second type, and the second type is a type of receiving the wake-up signal by performing coherent detection on a cover sequence.

[0050] The explanation and beneficial effects of the communication apparatus provided in the sixth aspect can refer to those of the communication method in the second aspect, which will not be repeated here.

[0051] In the seventh aspect, the embodiments of the present application provide a communication apparatus, which comprises: a generating unit, configured to generate a corresponding wake-up signal according to a terminal type, wherein when the terminal type comprises a first type, the wake-up signal comprises a preamble and a data part, when the terminal type does not comprise the first type, the wake-up signal comprises the data part but does not comprise the preamble, the first type is a type of receiving the wake-up signal by envelope detection, the preamble is used for time-frequency synchronization, and the data part carries wake-up information; and a transceiver unit, configured to send the wake-up signal to a terminal device.

[0052] With reference to the seventh aspect, in a possible implementation manner of the seventh aspect, when the terminal type does not include the first type, the transceiver is specifically configured to: after the monitoring occasion of the wake-up signal, transmit the wake-up signal to the terminal device after the time length of the preamble.

[0053] With reference to the seventh aspect, in a possible implementation manner of the seventh aspect, the ON symbol in the data part is generated by a cover sequence.

[0054] The explanation and beneficial effects of the communication device provided in the seventh aspect can refer to the communication method shown in the third aspect, and will not be described here again.

[0055] In the eighth aspect, an embodiment of the present application provides a communication device, which comprises: a generating unit configured to generate a corresponding wake-up signal according to a terminal type, wherein when the terminal type includes a first type, a time length of the wake-up signal is a first length, when the terminal type does not include the first type, the time length of the wake-up signal is less than the first length, the wake-up signal comprises a preamble and a data part, the first type is a type of receiving the wake-up signal by envelope detection, the preamble is used for time-frequency synchronization, and the data part carries wake-up information; and a transceiver configured to transmit the wake-up signal to a terminal device.

[0056] With reference to the eighth aspect, in a possible implementation manner of the eighth aspect, the ON symbol in the preamble is generated by a cover sequence.

[0057] With reference to the eighth aspect, in a possible implementation manner of the eighth aspect, the ON symbol in the data part is generated by a cover sequence.

[0058] The explanation and beneficial effects of the communication device provided in the eighth aspect can refer to the communication method shown in the fourth aspect, and will not be described here again.

[0059] In the ninth aspect, a communication device is provided, comprising a processor configured to enable the communication device to execute the first aspect and any possible method of the first aspect by executing computer programs or instructions or through a logic circuit.

[0060] In a possible implementation manner, the communication device further comprises a memory configured to store the computer programs or instructions.

[0061] In a possible implementation manner, the communication device further comprises a communication interface configured to input and / or output signals.

[0062] In the tenth aspect, a communication device is provided, comprising a processor configured to enable the communication device to execute the second aspect and any possible method of the second aspect by executing computer programs or instructions or through a logic circuit.

[0063] In a possible implementation form, the communication apparatus further comprises a memory for storing the computer program or instructions.

[0064] In a possible implementation form, the communication apparatus further comprises a communication interface for inputting and / or outputting signals.

[0065] In a possible implementation form, the communication apparatus further comprises a communication interface for inputting and / or outputting signals.

[0066] In a possible implementation form, the communication apparatus further comprises a memory for storing the computer program or instructions.

[0067] In a possible implementation form, the communication apparatus further comprises a communication interface for inputting and / or outputting signals.

[0068] In a possible implementation form, the communication apparatus further comprises a communication interface for inputting and / or outputting signals.

[0069] In a possible implementation form, the communication apparatus further comprises a memory for storing the computer program or instructions.

[0070] In a possible implementation form, the communication apparatus further comprises a communication interface for inputting and / or outputting signals.

[0071] In a possible implementation form, the communication apparatus further comprises a communication interface for inputting and / or outputting signals.

[0072] In a possible implementation form, the communication apparatus further comprises a communication interface for inputting and / or outputting signals.

[0073] In a fifteenth aspect, an embodiment of the present application provides a chip system, which comprises a logic circuit, the logic circuit being configured to be coupled with an input / output interface, and transmit data through the input / output interface to perform the method in the second aspect or any possible implementation manner of the second aspect.

[0074] In a sixteenth aspect, an embodiment of the present application provides a chip system, which comprises a logic circuit, the logic circuit being configured to be coupled with an input / output interface, and transmit data through the input / output interface to perform the method in the third aspect.

[0075] In a seventeenth aspect, an embodiment of the present application provides a chip system, which comprises a logic circuit, the logic circuit being configured to be coupled with an input / output interface, and transmit data through the input / output interface to perform the method in the fourth aspect or any possible implementation manner of the fourth aspect.

[0076] In an eighteenth aspect, an embodiment of the present application provides a computer readable storage medium, which stores program codes, when the program codes stored in the computer readable storage medium are run on a communication apparatus, the communication apparatus performs the method in the first aspect or any possible implementation manner of the first aspect.

[0077] In a nineteenth aspect, an embodiment of the present application provides a computer readable storage medium, which stores program codes, when the program codes stored in the computer readable storage medium are run on a communication apparatus, the communication apparatus performs the method in the second aspect or any possible implementation manner of the second aspect.

[0078] In a twentieth aspect, an embodiment of the present application provides a computer readable storage medium, which stores program codes, when the program codes stored in the computer readable storage medium are run on a communication apparatus, the communication apparatus performs the method in the third aspect or any possible implementation manner of the third aspect.

[0079] In a twenty-first aspect, an embodiment of the present application provides a computer readable storage medium, which stores program codes, when the program codes stored in the computer readable storage medium are run on a communication apparatus, the communication apparatus performs the method in the fourth aspect or any possible implementation manner of the fourth aspect.

[0080] In a twenty-second aspect, an embodiment of the present application provides a computer program product, which comprises computer program codes, when the computer program codes are run on a communication apparatus, the communication apparatus performs the method in the first aspect or any possible implementation manner of the first aspect.

[0081] In a twenty-third aspect, an embodiment of the present application provides a computer program product, which comprises computer program codes, when the computer program codes are run on a communication device, the communication device performs the method according to the second aspect or any possible implementation manner of the second aspect.

[0082] In a twenty-fourth aspect, an embodiment of the present application provides a computer program product, which comprises computer program codes, when the computer program codes are run on a communication device, the communication device performs the method according to the third aspect or any possible implementation manner of the third aspect.

[0083] In a twenty-fifth aspect, an embodiment of the present application provides a computer program product, which comprises computer program codes, when the computer program codes are run on a communication device, the communication device performs the method according to the fourth aspect or any possible implementation manner of the fourth aspect.

[0084] In a twenty-sixth aspect, a communication system is provided, which comprises the communication device according to the ninth aspect, the eleventh aspect, or the communication device according to the tenth aspect, the twelfth aspect.

[0085] The beneficial effects of the ninth aspect to the twenty-sixth aspect can be referred to the description of the first aspect to the fourth aspect. BRIEF DESCRIPTION OF DRAWINGS

[0086] FIG. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application.

[0087] FIG. 2 is a schematic diagram of a wake-up signal (WUS) mechanism according to an embodiment of the present application.

[0088] FIG. 3 is a schematic diagram of receiving a LP-WUS according to an embodiment of the present application.

[0089] FIG. 4 is a schematic diagram of an on-off keying (OOK) symbol according to an embodiment of the present application.

[0090] FIG. 5 is a schematic diagram of a Manchester coding according to an embodiment of the present application.

[0091] FIG. 6 is a schematic diagram of a method of transmitting an OOK symbol according to an embodiment of the present application.

[0092] FIG. 7 is a schematic diagram of an OOK symbol and LP-WUS information according to an embodiment of the present application.

[0093] FIG. 8 is a schematic diagram of a WUS containing a preamble according to an embodiment of the present application.

[0094] FIG. 9 is a schematic flow chart of a communication method 900 according to an embodiment of the present application.

[0095] FIG. 10 is a schematic flow chart of a communication method 1000 according to an embodiment of the present application.

[0096] FIG. 11 is a schematic flow chart of a communication method 1100 according to an embodiment of the present application.

[0097] FIG. 12 is a schematic diagram of a wake-up signal according to an embodiment of the present application.

[0098] FIG. 13 is a schematic diagram of another wake-up signal according to an embodiment of the present application.

[0099] FIG. 14 is a schematic diagram of yet another wake-up signal according to an embodiment of the present application.

[0100] FIG. 15 is a schematic diagram of yet another wake-up signal according to an embodiment of the present application.

[0101] FIG. 16 is a schematic flow chart of a communication method 1600 according to an embodiment of the present application.

[0102] FIG. 17 is a schematic diagram of a communication method 1600 according to an embodiment of the present application.

[0103] FIG. 18 is a schematic structural block diagram of a communication apparatus according to an embodiment of the present application.

[0104] FIG. 19 is a schematic structural block diagram of another communication apparatus according to an embodiment of the present application.

[0105] FIG. 20 is a schematic structural block diagram of another communication apparatus according to an embodiment of the present application.

[0106] FIG. 21 is a schematic structural block diagram of another communication apparatus according to an embodiment of the present application.

[0107] FIG. 22 is a schematic diagram of a chip system according to an embodiment of the present application. DETAILED DESCRIPTION

[0108] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0109] First, the communication system and network architecture applicable to the embodiments of the present application will be introduced with reference to the accompanying drawings.

[0110] The technical solutions provided in the present application can be applied to various communication systems, for example, a 5th generation (5G) or new radio (NR) system, a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, a universal mobile telecommunication system (UMTS), and the like. The technical solutions provided in the present application can also be applied to future communication systems. The technical solutions provided in the present application can also be applied to device to device (D2D) communication, vehicle-to-everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), an internet of things (IoT) communication system, a non-terrestrial network (NTN) communication system, or other communication systems.

[0111] The present application can also be applied to other communication systems. As long as there is an entity in the communication system that needs to send downlink data and pilot information, another entity needs to receive indication information, and can feed back information and transmit data through uplink, or in other words, there is a downlink and uplink communication link in the communication system.

[0112] It should be understood that the embodiments of the present application do not particularly limit the specific structure of the subject performing the provided method, as long as the subject can communicate according to the method provided in the embodiments of the present application by running a program in which the code of the method provided in the embodiments of the present application is recorded. For example, the subject performing the method provided in the embodiments of the present application can be a terminal device or a network device, or a functional module in a terminal device or a network device that can invoke and execute a program.

[0113] By way of example, FIG. 1 shows a schematic architecture diagram of a network architecture provided in the embodiments of the present application. By way of example, the architecture can include terminal devices and network devices. By way of example, the architecture can include terminal devices 101 to 106 and a network device 110. The network device 110 can establish connections with the terminal devices 101 to 104, and the terminal device 104 can establish connections with the terminal device 105 and the terminal device 106.

[0114] The terminal device related in the embodiments of the present application can also be referred to as a terminal, which can be a device with wireless transceiving function, which can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); can also be deployed in the air (such as airplanes, balloons and satellites, etc.). The terminal device can be a user equipment (UE). Among them, the UE includes a handheld device, a vehicle-mounted device, a wearable device or a computing device with wireless communication function. Illustratively, the UE can be a mobile phone, a tablet computer or a computer with wireless transceiving function, etc. In addition, the terminal device can also be a device capable of supporting the terminal to implement the function, such as a chip or a chip system, which can be installed in the terminal. In the technical solutions provided in the embodiments of the present application, the device for implementing the function of the terminal is taken as an example to describe the technical solutions provided in the embodiments of the present application. It should be understood that the terminal is a general term, including the most common mobile phone, CPE, integrated access backhaul (IAB) terminal, and the terminal device can also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in remote medical treatment, a wireless terminal in smart grid, a wireless terminal in smart city, a wireless terminal in smart home, etc.

[0115] In the embodiments of the present application, the device for implementing the function of the terminal device can be a terminal device, or a device capable of supporting the terminal device to implement the function, such as a chip system or a chip, which can be installed in the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0116] The network device involved in the embodiments of the present application includes a base station (BS), which can be a device capable of wireless communication with a terminal deployed in a wireless access network. Among them, the base station can have various forms, such as a macro base station, a micro base station, a relay station, an access point, a backhaul station, etc. Illustratively, the base station involved in the embodiments of the present application can be a base station in 5G or a base station in LTE. Among them, the base station in 5G can also be called a transmit / receive point (TRP) or a next generation base station (gNB). In the embodiments of the present application, the device for implementing the function of the network device can be a network device; it can also be a device capable of supporting the network device to implement the function, such as a chip or a chip system, which can be installed in the network device. In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices. In the technical solutions provided in the embodiments of the present application, the device for implementing the function of the network device is a network device, and taking the network device as a base station, the technical solutions provided in the embodiments of the present application are described.

[0117] It should be understood that the network architecture shown above is only an illustrative description, and the communication system to which the embodiments of the present application are applied is not limited thereto, and any communication capable of realizing the functions of the above-mentioned network elements is applicable to the embodiments of the present application. Illustratively, the network architecture shown in FIG. 1 can include more numbers and more types of aerial UEs and ground UEs. Further illustratively, the communication system of the embodiments of the present application can also be a non-terrestrial network (NTN) communication system, such as a satellite communication network, a high altitude platform station (HAPS), and an air-to-ground network, etc. For example, the satellite communication system can include a satellite, and there is a terminal device on the satellite to communicate with the ground base station. Among them, the satellite can refer to unmanned aerial vehicles, hot air balloons, low-orbit satellites, medium-orbit satellites, high-orbit satellites, and other non-ground base stations or non-ground devices, etc. The NTN communication system can be deployed alone or as a supplement to the ground network.

[0118] It should also be understood that the above-mentioned naming is only defined for the purpose of distinguishing different functions, and should not constitute any limitation on the present application. The present application does not exclude the possibility of using other names in the future in other networks.

[0119] Before introducing the embodiments, the terms involved in the present application are described in detail.

[0120] 1. Wakeup signal (WUS) mechanism

[0121] A power saving signal is a signal introduced for the purpose of saving power of a terminal device, and a WUS is one of the power saving signals. The type of the WUS can be various, including a downlink control information (DCI), a physical layer signal / sequence, a medium access control control element (MAC CE), a radio resource control (RRC) signaling, etc. The concept of a wake-up radio refers to that a terminal device only turns on a low power wake-up receiver (LP-WUR) to monitor a wake-up packet when a communication main module is in deep sleep. The wake-up packet generally carries a low power wake-up signal (LP-WUS). For ease of description, the "wake-up signal" in this document can refer to the LP-WUS.

[0122] A specific LP-WUS can be used to wake up a specific terminal device or a group of terminal devices, to trigger the terminal device or the group of terminal devices to wake up a main receiver to perform certain operations, including but not limited to updating a system message, receiving a paging message, initiating random access, receiving a disaster warning message, etc. Exemplarily, the grouping of the terminal devices can be pre-configured, or can be according to identifiers of the terminal devices in a cell, for example, terminal devices with the same last two digits of the identifier can be grouped into the same group of terminal devices, or can be that a core network groups terminal devices with the same service into the same group of terminal devices, for example, terminal devices applied to the Internet of Things can be grouped into the same group of terminal devices.

[0123] FIG. 2 shows a schematic diagram of a WUS mechanism provided by an embodiment of the present application. As shown in FIG. 2, for a paging process, a network device can send a WUS before or on a paging occasion (PO) to indicate whether a terminal device needs to monitor the PO or accept a paging message next time, to avoid unnecessary acceptance of the paging by the terminal device, thereby saving power of the terminal device.

[0124] FIG. 3 shows a schematic diagram of receiving LP-WUS by a terminal device according to an embodiment of the present application. As shown in (a) of FIG. 3, the terminal device can include a main receiver (MR) and a wakeup receiver (WUR). The wakeup receiver can also be referred to as a WUR circuit, a WUR receiver, a WUR communicator, a secondary communicator, a wakeup circuit, a communication auxiliary module, a secondary circuit, etc. The main receiver can also be referred to as a main circuit, a main communicator, a main modem, a main communication module, etc.

[0125] The main receiver is a traditional receiver of the NR terminal device, which is used to receive signaling, signals and data of the NR downlink. The main receiver can include a radio frequency module and a baseband processing module. The wakeup receiver can include a simple receiver composed of a radio frequency module, or a lower power module (the rate and bandwidth of the LP-WUS signal are much lower than the data of the NR). In addition, the wakeup receiver can use some radio frequency circuits and baseband circuits with lower power consumption, for example, it can not include a mixer, or use a ring oscillator to replace a phase lock loop (PLL), or use a low noise amplifier (LNA) with a higher noise figure.

[0126] In some embodiments of the present application, the wakeup receiver can also be a sub-module (i.e., a partial module) of the main receiver, or multiplex some circuits, devices, etc. with the main receiver. Alternatively, compared with the main receiver, the wakeup receiver includes fewer devices, for example, it does not include a fast Fourier transform module, a complex channel decoding module, a low density parity check code (LDPC) decoding module, a polar decoding module, etc. In addition, compared with the main receiver, the wakeup receiver can also have fewer registers and memory units, and use a lower bandwidth bus, so its power consumption is lower than that of the main receiver. Alternatively, the main receiver in a low power mode can also be considered as a wakeup receiver, for example, when the main receiver reduces the operating voltage, turns off some high power functions, slows down the clock frequency, or reduces the sampling rate and bit width of the analog-to-digital sampling, it is a wakeup receiver. The present application does not make specific limitations on the structure of the main receiver and the wakeup receiver in the terminal device. For ease of understanding, the WUS mechanism is introduced below as two different modules.

[0127] As shown in (a) of FIG. 3, the wake-up receiver is in an on state, and the main receiver is in an off state. At this time, the wake-up receiver can be used to detect a wake-up signal or wake-up data when the main receiver is in the off state. If the wake-up receiver receives the wake-up signal or the wake-up data, the wake-up receiver will wake up the main receiver, and the main receiver can further complete the transmission and reception of data and signaling. If the wake-up receiver does not receive the wake-up signal or the wake-up data, the main receiver will continue to remain in the off state, thereby saving the power consumption of the terminal device.

[0128] As shown in (b) of FIG. 3, the terminal device can switch between state 1 and state 2. In state 1, when the main receiver returns to an idle state after completing data transmission or reception, the main receiver can enter an ultra-deep sleep mode of an ultra-low power consumption state or even be completely turned off to reduce power consumption, at which time the wake-up receiver of the terminal is in a powered-on state and receives an LP-WUS; in state 2, once the wake-up receiver receives an LP-WUS sent to the terminal device or a terminal device group to which the terminal device belongs, the wake-up receiver will wake up the main receiver to turn on the main receiver, and the main receiver will continue to transmit and receive data or signaling.

[0129] 2. On-off keying (OOK), OOK receiver

[0130] OOK is a simplest form of amplitude-shift keying (ASK) modulation, which represents information by the presence or absence of a signal. For example, bit 1 represents the presence of a signal (ON) in a signal sampling time, and bit 0 represents the absence of a signal (OFF) in the signal sampling time, or vice versa, bit 1 represents the absence of a signal (OFF) in a signal sampling time, and bit 0 represents the presence of a signal (ON) in the signal sampling time.

[0131] FIG. 4 shows a schematic diagram of an OOK symbol according to an embodiment of the present application. As shown in (a) of FIG. 4, 24 samples are transmitted in a signal sampling time, and each 12 samples represent one coded bit, where the first 12 samples represent the transmission of a signal (i.e., a bit value of 1 is transmitted as shown), representing an OOK ON symbol, coded as 1; the last 12 samples do not represent a symbol, representing an OOK OFF symbol, coded as 0. (b) of FIG. 4 and (c) of FIG. 4 respectively show the real part and the imaginary part of the signal shown in (a) of FIG. 4, and the amplitudes are In other words, the envelope of the real part and the imaginary part is the OOK symbol shown in (a) of FIG. 4.

[0132] For the reception of OOK symbols, the envelope detection (ED) method is generally used, and the main way of envelope detection is to detect the amplitude or energy of the signal. Due to the above-mentioned simple modulation characteristics of the OOK symbol, the receiver can obtain the signal only by energy detection. For example, in the above-mentioned first 12 samples, once the terminal device detects that the received signal energy exceeds a certain threshold, it can be considered that the network device transmits bit 1, and in the above-mentioned last 12 samples, the terminal device detects that the received signal does not exceed a certain threshold, which can be considered as bit 0. However, since a single OOK symbol needs to be compared with a preset threshold, it is generally difficult to design a universal threshold suitable for various communication system scenarios. Therefore, multiple OOK symbols are usually used to represent bit information through Manchester coding.

[0133] FIG. 5 shows a schematic diagram of Manchester coding provided by the present application. As shown in FIG. 5, Manchester coding can use the envelope change of two consecutive OOK symbols to represent a bit, and the terminal device can directly compare the front and rear two symbols in the Manchester coding when receiving the signal to perform decoding. For example, as shown in FIG. 5, if the envelope level of the first symbol is less than that of the second symbol, the OOK symbol can be judged as 01, and the bit information can be judged as bit 1, otherwise the bit information can be judged as bit 0. This scheme does not need to perform threshold judgment on two symbols, that is, it does not need to compare the envelope level of each symbol with a threshold respectively.

[0134] It is worth noting that the schematic diagram of Manchester coding shown in FIG. 5 is only an example. In some other embodiments of the present application, Manchester coding can also use the envelope change of three or more OOK symbols to represent bit information. The present application does not limit the coding mode of Manchester coding, and for the convenience of understanding, the present application takes the Manchester coding shown in FIG. 4 as an example to introduce the scheme of the embodiments.

[0135] There are two ways to send OOK symbols in the existing orthogonal frequency division multiplexing (OFDM) system. FIG. 6 shows a schematic diagram of two methods for sending OOK symbols provided by the embodiments of the present application, wherein the parts marked with shading represent the presence of signal transmission.

[0136] As shown in (a) of FIG. 6, one OFDM symbol (i.e., any one of symbols 0-3 as shown in the figure) is composed of multiple resource elements (REs) in the frequency domain (i.e., resource elements 0-11 as shown in the figure), carrying one OOK ON or OFF symbol. Among them, there is signal transmission on symbol 0 and symbol 3, indicating OOK ON symbol, and there is no signal transmission on symbol 1 and symbol 2, indicating OOK OFF symbol. When Manchester coding as shown in FIG. 4 is used, the combination of OOK symbols of symbols 0 and 1 is (ON, OFF), indicating bit 0, and the combination of OOK symbols of symbols 2 and 3 is (OFF, ON), indicating bit 1. Thus, when Manchester coding as shown in FIG. 4 is used, each OFDM symbol carries 1 bit OOK symbol, but actually only carries 0.5 bit information.

[0137] As shown in (b) of FIG. 6, each OFDM symbol is divided into 4 OOK symbols, also called 4 segments. When Manchester coding as shown in FIG. 4 is used, the combination of segment 0 and segment 1 in symbol 0 is (ON, OFF), indicating bit 0, and the combination of segment 2 and segment 3 in symbol 0 is (OFF, ON), indicating bit 1. Thus, the four segments of symbol 0 represent bit information 01, and by analogy, the four segments of symbol 1 represent bit information 10. At this time, each OFDM symbol carries 4 bit OOK symbol, and carries 2 bit information at the same time.

[0138] The LP-WUS can be directly represented by the OOK signal of the Manchester coding mentioned above, or in other words, the ON / OFF pattern of multiple OOK symbols can be used to represent one LP-WUS signal. The wake-up receiver of the terminal device can receive the above-mentioned LP-WUS signal through envelope detection, and the above-mentioned type of wake-up receiver can be referred to as an OOK receiver, or can be referred to as an envelope detection receiver.

[0139] 3. Overlaid sequence, OFDM receiver

[0140] FIG. 7 shows a schematic diagram of an OOK symbol and LP-WUS information. As shown in FIG. 7, the network device transmits a total of 16 bit information, and the LP-WUS information uses Manchester coding as shown in FIG. 4, so a total of 32 OOK symbols are included. When the wake-up receiver is the OOK receiver mentioned above, the OOK receiver detects and compares the energy of two adjacent OOK symbols, and judges the bit information corresponding to the two OOK symbols as 1 or 0 according to the comparison result.

[0141] At present, the generation sequence of each OOK ON symbol can also be directly used to represent the LP-WUS information, or the generation sequence of each OOK ON symbol is used to represent one or more bits in the LP-WUS information. The principle is that the network device can use a sequence to modulate the generation of each OOK ON symbol when sending the LP-WUS. For example, as shown in (a) of FIG. 4, one OOK ON symbol can be generated using a full-1 sequence with a length of 12. For another example, as shown in (b) and (c) of FIG. 4, one OOK ON symbol can be generated using a complex sequence with a length of 12, and the modulus of each sample is 1. That is, in the embodiments of the present application, assuming that one OOK ON symbol is composed of N samples, a complex sequence with a length of N can be used to generate. In some other embodiments of the present application, a Zadoff-Chu (ZC) sequence, a pseudo-random sequence (such as an m sequence, a gold sequence, etc.), or a quadrature phase shift keying (QPSK) sequence, etc. can also be used to generate the OOK ON symbol.

[0142] Exemplarily, as shown in FIG. 7, 32 OOK symbols include 16 OOK ON symbols. The 16 OOK ON symbols can be respectively generated using the same overlaid sequence, for example, using a ZC sequence and the 16 OOK ON symbols can be generated using different root sequences. In some other embodiments, the 16 OOK ON symbols can also be respectively generated using different overlaid sequences, for example, the first OOK ON symbol and the second OOK ON symbol can both be generated using a ZC sequence, but the parameters of the sequence, such as the root value or the cyclic shift of the sequence, are different.

[0143] The above sequence used to generate the OOK ON symbol can be referred to as an overlaid sequence. When receiving the LP-WUS signal, the network device can agree with the terminal device on the appearance position of the above sequence (that is, the appearance position of the OOK ON symbol shown in FIG. 7) and the overlaid sequence used to generate each OOK ON symbol in advance, or the network device can also configure the above information to the terminal device through signaling. The terminal device can use the corresponding overlaid sequence to perform coherent detection (also called coherent demodulation) on each OOK ON symbol. A commonly used coherent demodulation method is to calculate a correlation value c by correlation detection, and the calculation method of the correlation value c is shown in the following formula:

[0144] Wherein, N represents the number of samples in one OOK symbol (for example, the number of samples in FIG. 4 is 12), L i (i = 1, 2, …, N) is a local sequence stored by the terminal device, a conjugate value of a signal of a single OOK symbol received by the terminal device.

[0145] When the signal containing the OOK ON symbol is the same as the local sequence, a large peak value of the correlation value c will occur; when the signal containing the OOK ON symbol is different from the local sequence, or the network transmits an OOK OFF symbol, or the network does not transmit an LP-WUS signal (including other NR signals transmitted), the correlation value is generally very low. Therefore, the terminal device can determine whether the received signal is the expected LP-WUS based on the correlation value of different OOK ON symbols and the local stored sequence.

[0146] For example, if the OOK ON symbol is generated by a complex sequence with a length of N1, the terminal device correlates the complex sequence with a length of N1 with the corresponding local sequence, and a large correlation value is obtained, then the terminal device considers that the network device transmits the OOK ON symbol generated by the complex sequence modulation. For another example, if the OOK ON symbol is generated by a ZC sequence, the terminal device correlates the ZC sequence with the corresponding local sequence, and a large correlation value is obtained, then the terminal device considers that the network device transmits the OOK ON symbol generated by the corresponding ZC sequence modulation. Finally, the terminal device determines whether the network device transmits the expected LP-WUS by correlating the OOK symbol in the received signal with the corresponding local sequence.

[0147] The receiver that receives the LP-WUS by the above coherent detection is called an OFDM receiver, or a sequence receiver. Compared with the envelope detection of the OOK receiver, the anti-interference ability is stronger, the receiving performance is better, and a larger coverage range can be supported.

[0148] Further, for each OOK ON symbol, the network device can also use one of a plurality of candidate cover sequences to generate, thereby carrying more information. For example, in an embodiment of the present application, an OOK ON symbol has 4 candidate cover sequences, and each cover sequence can carry 2bit information. Compared with the OOK receiver which can only receive 1bit information for each OOK ON / OFF combination, the OFDM receiver can obtain 2bit information in the ON symbol in the OOK ON / OFF combination, so that the LP-WUS can carry more information through a plurality of candidate cover sequences. Exemplarily, the mapping rule of each cover sequence and bit information is shown in Table 1 as follows:

[0149] Table 1

[0150] Exemplarily, as shown in FIG. 7, if the LP-WUS contains 16-bit information, the LP-WUS information needs 16 OOK ON / OFF symbol combinations, i.e., 32 OOK symbols (16 OOK ON symbols and 16 OOK OFF symbols) to represent. Among them, the first OOK ON symbol can be generated by Seq2 shown in Table 1, which is used to represent that the first two bits in the information contained in the LP-WUS are "01" corresponding to Seq2 in Table 1. The second OOK ON symbol can be generated by Seq3 shown in Table 1, which is used to represent that the third and fourth bits in the information contained in the LP-WUS are "10" corresponding to Seq3 in Table 1. Similarly, the 8 cover sequences (i.e., Seq2, Seq3, Seq1, Seq2, Seq3, Seq1, Seq4, Seq1 shown in FIG. 7) used to generate the 8 OOK ON symbols in the first 16 OOK symbols of the LP-WUS can carry all the LP-WUS information (i.e., 0110000110001100 shown in FIG. 7). In other words, the network device can send the 16-bit LP-WUS information through the 8 OOK ON symbols. In addition, the network device can also use the 8 cover sequences to generate the 8 OOK ON symbols in the remaining 16 OOK symbols, or in other words, the 8 cover sequences used to generate the 8 OOK ON symbols in the remaining 16 OOK symbols are also the 8 cover sequences used to generate the 8 OOK ON symbols in the first 16 OOK symbols (i.e., Seq2, Seq3, Seq1, Seq2, Seq3, Seq1, Seq4, Seq1 shown in FIG. 7). In this way, the OFDM receiver can receive the complete 16-bit LP-WUS information again, thereby obtaining better performance.

[0151] For the OFDM receiver, it can only detect the corresponding cover sequences in the first 8 OOK ON symbols and not detect the cover sequences in the subsequent 8 OOK ON symbols to save power consumption, or it can detect all the cover sequences to ensure the accuracy of the received LP-WUS.

[0152] Further, the network device can also use the 8 OOK ON symbols in the remaining 16 OOK symbols to generate other control information, such as indicating a short message, indicating a check code, etc., which is not limited in the present application.

[0153] It is worth noting that the present application does not limit the number of candidate cover sequences and the bits indicated by each candidate cover sequence. For example, in some other embodiments of the present application, there can be 5-8 candidate cover sequences, and each candidate cover sequence is used to indicate 3 bits.

[0154] The existing process and the existing technical problems will be described below with reference to the drawings.

[0155] The current NR system can support both OOK receivers and OFDM receivers to receive the LP-WUS signal, that is, the transmitted LP-WUS is represented by the OOK ON / OFF symbol, and the network device configures the coverage sequence of the OOK ON symbol used to generate the LP-WUS to the terminal device (or agrees in advance), so that the terminal device can use the OFDM receiver to detect.

[0156] In order to reduce power consumption, the crystal oscillator used by the wake-up receiver of the terminal device is generally poor in quality compared with the main receiver, so that the frequency deviates after a long time of work. For example, the frequency drift of a crystal oscillator used by the OOK wake-up receiver is 0.1 ppm / s, that is, if the OOK wake-up receiver works at a carrier frequency of 2.6 GHz, the frequency will drift 260 Hz per second, and the frequency drift will also cause time drift. Both frequency deviation and time deviation will affect the reception performance of the LP-WUS.

[0157] In order to solve the above problems, the network device can send a periodic synchronization signal (low power synchronization signal, LP-SS) to the terminal device to provide time and frequency synchronization function. The synchronization signal can be sent periodically or non-periodically to provide time synchronization function for the OOK wake-up receiver, so as to determine whether the terminal device is in the coverage range of the cell and whether the local clock has deviated. The synchronization signal can also carry the identifier of the cell, which is used to distinguish different cells accessed by the terminal device.

[0158] However, due to the fixed system signaling overhead caused by the periodic LP-SS, its period is generally 320 ms or more. The LP-SS sent once every 320 ms still cannot meet the time and frequency synchronization requirements of the wake-up receiver, so in order to improve the reception performance of the LP-WUS, a preamble is currently attached before each LP-WUS signal. The preamble also includes a plurality of OOK symbols using Manchester coding, and the ON / OFF symbol can be agreed in advance by the network device and the terminal device, or can be configured by the network device to the terminal device. The terminal device will first detect the preamble when receiving the LP-WUS, and adjust the frequency and clock of the wake-up receiver according to the preamble, and then receive the valid information in the LP-WUS.

[0159] FIG. 8 shows a schematic diagram of a wake-up signal containing a preamble according to an embodiment of the present application. As shown in FIG. 8, the wake-up signal includes a preamble and a payload (or can be referred to as a "data part" or payload). The preamble and the payload part can each include an OOK symbol. However, the preamble itself does not carry the LP-WUS information and is a system signaling overhead. Meanwhile, for an OFDM receiver, other methods can be used to achieve time-frequency synchronization. For example, the OFDM receiver can directly use the secondary synchronization signal / primary synchronization signal (SSS / PSS) in the existing NR system synchronization signal / PBCH block (SSB) to obtain time-frequency synchronization. In the existing NR system, the SSB transmission period is generally 20 ms. Compared with the 320 ms period of the LP-SS, the SSS / PSS synchronization can achieve better time-frequency performance.

[0160] Therefore, if the wake-up receiver of the single terminal device woken up by the LP-WUS is an OFDM receiver, or the terminal device group woken up by the LP-WUS does not include a terminal device with an OOK receiver as the wake-up receiver, time-frequency synchronization is not dependent on the preamble, and for example, the NR SSS / PSS described above can be used for time-frequency synchronization. Therefore, adding a preamble for time-frequency synchronization in the LP-WUS is a waste of system resources. In addition, in a terminal device group, there can be a case where some terminal devices use OOK receivers and some terminal devices use OFDM receivers, which can cause a waste of system overhead for terminal devices using OFDM receivers.

[0161] Therefore, in view of the above, the present application proposes a communication method 900, which can reduce unnecessary system resource overhead. FIG. 9 shows a schematic flowchart of the communication method 900 according to an embodiment of the present application, wherein the method 900 includes steps S910-S930.

[0162] S910: A network device generates a corresponding wake-up signal according to a terminal type.

[0163] It should be understood that, according to the above-described manner of receiving the wake-up signal by different types of wake-up receivers, the terminal device can be divided into multiple terminal types. For example, a first type of terminal type can be a type of receiving the wake-up signal by envelope detection, or as mentioned above, a type of receiving the wake-up signal by an OOK receiver. Alternatively, when the terminal type is not the first type, it can be a second type, i.e., a type of receiving the wake-up signal by coherent detection of a cover sequence, or in other words, a type of receiving the wake-up signal by an OFDM receiver. Alternatively, the terminal type can also include other types, which are not limited in the present application. For ease of description, the present application takes the first type and the second type as examples to introduce the embodiments.

[0164] For the network device, the wake-up signal generated thereby can be used to wake up one terminal device or one or more terminal device groups (each terminal device group can include multiple terminal devices). Thus, the terminal type according to which the network device generates the wake-up signal can be the terminal type of one terminal device or the terminal type of multiple terminal devices. When the terminal type includes the terminal type of multiple terminal devices, it can include the first type and the second type, or only the first type or only the second type.

[0165] Specifically, when the terminal type includes the first type or at least one terminal device is of the first type, the wake-up signal includes a preamble and a data part. The preamble is used for time-frequency synchronization, and the data part carries wake-up information. Further, for the terminal device of the first type, the wake-up signal includes the preamble for time-frequency synchronization, so that the OOK receiver can adjust the receiver frequency and clock according to the preamble.

[0166] Specifically, when the terminal type does not include the first type, the wake-up signal includes a data part but does not include a preamble. For terminal devices of other types, their wake-up receivers can perform time-frequency synchronization by means of SSS / PSS in SSB, and do not necessarily need a preamble. Thus, the wake-up signal can not include a preamble part, reducing the redundant system overhead caused by the preamble part.

[0167] In the embodiments of the present application, according to FIG. 8, the wake-up signal can include multiple symbols modulated by on-off keying (OOK), or in other words, the multiple symbols can be the OOK symbols shown in FIG. 4. The OOK ON symbols in the multiple symbols can be generated by a cover sequence. The manner of generating the OOK ON symbols by the cover sequence can be referred to the description of the cover sequence term in the above.

[0168] Optionally, when the terminal device comprises the first type, the ON symbols of the data part of the wake-up signal can be generated by the cover sequence, while the ON symbols of the preamble are not generated by the cover sequence. When the terminal device does not comprise the first type, the ON symbols of the data part of the wake-up signal can be generated by the cover sequence. In other words, regardless of whether the terminal type comprises the first type, the wake-up signal only has the ON symbols of the data part generated by the cover sequence.

[0169] In this way, a new wake-up signal detection mechanism can be avoided, that is, regardless of whether the terminal type comprises the first type, the OOK receiver detects the wake-up signal in the manner of detecting the preamble and the data part, and the OFDM receiver detects the wake-up signal in the manner of detecting the cover sequence for generating the ON symbols of the data part. The form of the wake-up signal will be described in detail in the embodiment part below, which will not be repeated here.

[0170] S920: The network device sends the wake-up signal to the terminal device.

[0171] Correspondingly, the terminal device receives the wake-up signal from the network device. Or more specifically, the wake-up receiver of the terminal device receives the wake-up signal from the network device.

[0172] In the embodiments of the present application, when the terminal type does not comprise the first type, the network device sends the wake-up signal to the terminal device after the time length of the preamble after the monitoring occasion of the wake-up signal. The monitoring occasion can also be referred to as monitoring occasion, which is sent by the network device to the terminal device or user equipment through system message, or pre-agreed wake-up signal sending time position and length. The monitoring occasion of the wake-up signal generally appears periodically, and the time length of each period is usually the same as that of discontinuous reception (DRX), for example, both are 1.28 seconds. There can be one or more monitoring occasions in each period.

[0173] In this way, the start detection time position of the payload of the wake-up signal with and without the preamble can be unified. No additional LP-WUS detection mechanism is introduced for the terminal devices of the first type and the second type.

[0174] S930: The terminal device receives the wake-up signal according to the type of the terminal device through the corresponding wake-up signal receiving occasion.

[0175] It should be understood that, as mentioned above, the network device can wake up a single terminal device or multiple terminal devices, and the terminal types of the multiple terminal devices can include the first type, the second type, or other types. Therefore, when the terminal device is of the first type, the wake-up signal received by the terminal device can include the preamble and the data part, and when the terminal device is not of the first type, the wake-up signal received by the terminal device can only include the data part or include the preamble and the data part (i.e., there is a terminal device of the first type in the terminal device group to which the terminal device belongs).

[0176] Specifically, when the terminal type of the terminal device is the first type, the starting time of the wake-up signal receiving occasion is the starting time of the monitoring occasion of the wake-up signal, and the wake-up signal includes the preamble and the data part. Further, the OOK receiver starts to receive the wake-up signal at the starting time of the monitoring occasion of the wake-up signal, and the received wake-up signal includes the preamble and the data part for time-frequency synchronization.

[0177] Specifically, when the terminal type of the terminal device is not the first type, the wake-up signal receiving occasion is the starting time of the monitoring occasion of the wake-up signal plus the time length of the preamble. Further, the OFDM receiver or other types of wake-up receivers can receive the wake-up signal after skipping the time length of the preamble. Further, for the wake-up signal including the preamble and the data part, since the OFDM receiver skips the time length of the preamble, only the data part is actually received, and no additional preamble is included. For the wake-up signal including only the data part, the OFDM receiver receives the complete wake-up signal.

[0178] In steps S910 to S930, when the terminal type does not include the first type, the wake-up signal generated by the network device does not include the preamble. When the terminal type of the terminal device is not the first type, the wake-up signal receiving occasion of the terminal device is the starting time of the monitoring occasion of the wake-up signal plus the time length of the preamble. Further, on the one hand, the sending scenario of the preamble is reduced, and the resource overhead caused by the preamble is reduced. When the network device does not send the preamble, the part of time-frequency resources can be left for other NR downlink data and signaling transmission. Moreover, since there is no preamble, the false alarm probability of the OOK receiver misjudging the LP-WUS or the short LP-WUS without the preamble is reduced. On the other hand, the starting detection time position of the payload of the wake-up signal with or without the preamble can be unified. For the terminal devices of the first type and the second type, no additional LP-WUS detection mechanism is introduced.

[0179] To solve the above technical problems, the application further provides a communication method 1000, which can also reduce unnecessary system resource overhead. FIG. 10 shows a schematic flowchart of the communication method 1000 provided by the embodiments of the application, wherein the method 1000 includes steps S1010 to S1030.

[0180] S1010: The network device generates a corresponding wake-up signal according to the terminal type.

[0181] For the terminal device and the generated wake-up signal, refer to the description in the communication method 900, which will not be repeated here.

[0182] Specifically, when the terminal type includes the first type, the time length of the wake-up signal is a first length, and the wake-up signal includes a preamble and a data part. The first type is a type of receiving the wake-up signal through envelope detection, the preamble is used for time-frequency synchronization, and the data part carries wake-up information. The first length can be the length of one monitoring occasion of the wake-up signal.

[0183] Specifically, when the terminal type does not include the first type, the time length of the wake-up signal is less than the first length. And the wake-up signal includes a preamble and a data part. In other words, according to the above, the cover sequence used to generate the ON symbol can carry one or more bits of the wake-up signal, so that when the terminal type does not include the first type, the OFDM receiver can obtain all or part of the wake-up information through the bit information carried by the cover sequence, rather than the OOK receiver which can only determine the wake-up signal through the OOK symbol. Further, when the terminal type does not include the first type, the network device generates a shorter wake-up signal. The form of the wake-up signal will be described in detail below, which will not be repeated here.

[0184] S1020: The network device sends the wake-up signal to the terminal device.

[0185] Correspondingly, the terminal device receives the wake-up signal from the network device. Or more specifically, the wake-up receiver of the terminal device receives the wake-up signal from the network device.

[0186] In the embodiments of the application, the network device sends the wake-up signal to the terminal device after the monitoring occasion of the wake-up signal, regardless of whether the terminal type includes the first type. In this way, no additional LP-WUS detection mechanism is introduced for the terminal devices of the first type and the second type.

[0187] S1030: The terminal device receives the wake-up signal through a corresponding wake-up signal detection time according to the terminal type of the terminal device.

[0188] Specifically, when the terminal type of the terminal device is the first type, the wake-up signal detection duration is of the first length, and then the wake-up signal of the first length including the preamble and the complete wake-up information can be received.

[0189] Specifically, when the terminal type of the terminal device is not the first type, the wake-up signal detection duration is less than the first length. In other words, the terminal device of the non-first type can detect the shorter wake-up signal generated by the network device through the shorter wake-up signal detection duration, and determine part or all of the wake-up information according to the cover sequence used to generate the ON symbol in the wake-up signal. In turn, the system overhead of the wake-up signal can be reduced. Moreover, the formats of the wake-up signals received by the OOK receiver and the OFDM receiver are unified, i.e., both include the preamble and the data part.

[0190] Optionally, in the embodiments of the present application, after receiving the wake-up signal, the wake-up receiver of the terminal device can wake up the main receiver to perform paging or data transmission according to the wake-up information.

[0191] Optionally, in some other embodiments of the present application, the network device or the terminal device can combine the communication method 900 and the communication method 1000. For example, when the terminal type includes the first type, the network device generates a wake-up signal of the first length including the preamble and the data part, when the terminal type does not include the first type, the network device generates a wake-up signal of a time length much smaller than the first length, and the data part can carry the wake-up information through the cover sequence. For another example, when the terminal type of the terminal device is the first type, the terminal device detects the wake-up signal through the detection duration of the first length at the start time of the monitoring occasion of the wake-up signal, and when the terminal type of the terminal device is not the first type, the terminal device detects the wake-up signal through the detection duration less than the first length after the start time of the monitoring occasion of the wake-up signal by the time length of the preamble.

[0192] Optionally, in order to enable the network device to know the terminal type of the terminal device, before the communication method 900 and the communication method 1000, FIG. 11 further shows a communication method 1100 provided by an embodiment of the present application, wherein, as shown in FIG. 11, the method 1100 includes steps S1110 to S1130.

[0193] S1110, the terminal device reports the type of the wake-up receiver to the core network element.

[0194] In other words, before detecting the LP-WUS, the terminal device first reports the capability of the terminal device to the core network element, and the capability of the terminal device includes the type of the wake-up receiver, i.e., whether the used wake-up receiver is the OFDM receiver or the OOK receiver.

[0195] Specifically, the terminal device or the terminal device group reports to the core network element that the type of the wake-up receiver is the first type or an OOK receiver; the terminal device reports to the core network element that the type of the wake-up receiver is the second type or an OFDM receiver, or the terminal device group reports to the core network element that the type of the wake-up receiver includes the first type and the second type.

[0196] In S1120, the core network element confirms the type of the wake-up receiver used by the terminal device or the terminal device group.

[0197] In S1130, the core network element sends a paging message to the network device and sends the type of the wake-up receiver of the terminal device or the terminal device group.

[0198] Specifically, when the network device needs to send a paging to the terminal device or the terminal device group, the network device can send a wake-up signal to the terminal device or the terminal device group. After the network device receives the type of the wake-up receiver of the terminal device or the terminal device group, the steps described in the communication method 900 and the communication method 1000 can be implemented.

[0199] The embodiments of the wake-up signal in the present application will be described below with reference to FIGS. 12 to 15. Among them, the wake-up signal will be described below with reference to embodiments 1 and 2.

[0200] Embodiment 1:

[0201] FIG. 12 shows a schematic diagram of a wake-up signal provided by an embodiment of the present application. The wake-up signal shown in FIG. 12 is the wake-up signal generated by the network device in the communication method 900 when the terminal type includes the first type. As shown in FIG. 12, the structure of the wake-up signal is the same as that of the wake-up signal shown in FIG. 8, including a preamble and a payload, and the payload part includes complete wake-up information. As described in step 910 and shown in FIG. 8, the preamble and the wake-up information of the wake-up signal can include a plurality of OOK symbols.

[0202] The structure of the wake-up signal shown in FIG. 12 is the same as that of the wake-up signal shown in FIG. 8, because the terminal device of the first type or the OOK receiver needs to perform time-frequency synchronization through the preamble in the wake-up signal, and identify the OOK symbol of the wake-up signal through the envelope detection method to obtain the wake-up information. However, since the wake-up signal can also be received by the OFDM receiver or the terminal device of the second type, the ON symbol in the wake-up signal shown in FIG. 12 can be generated through the cover sequence.

[0203] Exemplarily, assuming the length of the preamble in the wake-up signal shown in FIG. 12 is 6 bits, and the length of the wake-up information is 18 bits, the wake-up signal can be represented by 48 OOK ON / OFF symbols (24 OOK ON symbols and 24 OOK OFF symbols), i.e., the preamble can be represented by 12 OOK ON / OFF symbols (6 OOK ON symbols and 6 OOK OFF symbols), and the wake-up information is represented by 36 OOK ON / OFF symbols (18 OOK ON symbols and 18 OOK OFF symbols).

[0204] Optionally, as shown in FIG. 12, the wake-up information in the wake-up signal can all be generated by cover sequences, for example, generated by using 4 candidate cover sequences as shown in Table 1, and each cover sequence used to generate each ON symbol can represent 2 bits of information. Therefore, only 9 cover sequences (i.e., cover sequences 1-9 in the figure) of the first 9 ON symbols in the wake-up information need to be generated to represent the complete 18 bits of wake-up information. In other words, the OFDM receiver can obtain the complete 18 bits of wake-up information by detecting the first 9 ON symbols. The network device can continue to send the last 9 OOK ON symbols generated by cover sequences, so that the OFDM receiver can repeatedly detect the complete 18 bits of wake-up information once, thereby improving the reception performance.

[0205] Optionally, part of the wake-up information in the wake-up signal can be generated by cover sequences. For example, only the first 9 ON symbols in the wake-up information can be generated by 9 cover sequences (i.e., cover sequences 1-9 in the figure), and the 9 cover sequences can represent the complete 18 bits of wake-up information. In other words, the last 9 OOK ON symbols in the wake-up information can not be generated by cover sequences. At this time, the OFDM receiver can also obtain the complete 18 bits of wake-up information by detecting the first 9 ON symbols in the wake-up information.

[0206] Alternatively, the cover sequences used to generate the ON symbols can also be used to indicate part of the wake-up information. For example, for the sake of description, the wake-up information is divided into 3 information blocks (i.e. information blocks #1-#3), where the wake-up information is 18 bits, and each information block contains 6 bits. The 6 cover sequences used to generate each information block can carry 12 bits of information. Further, the information block #1 can be generated by 6 cover sequences. For example, the 6 cover sequences used to generate the information block #1 can carry 12 bits of information in the information blocks #2 and #3, and further, the OFDM receiver can combine the OOK symbols contained in the information block #1 with the information carried by the 6 cover sequences used to generate the information block #1 to obtain the complete 18 bits of wake-up information after receiving the wake-up signal. The above alternative case will be described in detail below based on another format of the wake-up signal in FIG. 13.

[0207] FIG. 13 shows another schematic diagram of a wake-up signal provided by the embodiments of the present application. The wake-up signal shown in FIG. 13 is the wake-up signal generated by the network device in the communication method 900 when the terminal type does not include the first type. As shown in FIG. 13, the structure of the wake-up signal only includes a payload part without a preamble, and the payload part indicates the wake-up information. According to the above, the reason is that when the terminal type does not include the first type, the terminal device does not need the preamble for time-frequency synchronization, and therefore, in order to reduce system overhead, the network device can generate the wake-up signal without the preamble.

[0208] For example, it is assumed that the length of the wake-up information in the wake-up signal shown in FIG. 13 is 18 bits or contains 18 bits of information, and the wake-up information can be represented by 36 OOK ON / OFF symbols (18 OOK ON symbols and 18 OOK OFF symbols). As shown in (a) of FIG. 13, if each ON symbol is generated by 4 candidate cover sequences as shown in Table 1, each cover sequence used to generate each ON symbol can represent 2 bits of information, and further, only 9 cover sequences of the first 9 ON symbols are needed to represent the complete 18 bits of wake-up information. Or, the OFDM receiver can obtain the complete 18 bits of wake-up information by detecting the first 9 ON symbols. And the network device can continue to send the last 9 OOK ON symbols, so that the OFDM receiver can repeatedly detect the complete 18 bits of wake-up information once, and further, improve the reception performance.

[0209] Thus, in the wake-up signal shown in (a) of FIG. 13, the wake-up signal includes the complete wake-up information, and in the 18 ON symbols used to represent the wake-up information, the same 9 cover sequences (i.e., cover sequences 1-9 shown in the figure) used to generate the first 9 ON symbols and the last 9 ON symbols can all carry the complete 18-bit wake-up information. Further, after receiving the wake-up signal shown in (a) of FIG. 13, the OFDM receiver can repeatedly detect the wake-up information according to the cover sequences 1-9.

[0210] Alternatively, the wake-up signal can include part of the wake-up information. As mentioned above, the cover sequences used to generate the ON symbols can repeatedly carry the wake-up information. If the ON symbols repeatedly carrying the wake-up information are removed, in some embodiments of the present application, the wake-up signal can not include the complete length of the wake-up information, but only the OOK symbols that can carry the wake-up information. In other words, compared with the embodiment shown in (a) of FIG. 13, the wake-up signal can include only half the length of the wake-up information.

[0211] For example, based on the embodiment shown in (a) of FIG. 13, as shown in (b) of FIG. 13, the wake-up signal can include only the first part of the 9 bits of the 18-bit wake-up information, or in other words, only the first 9 OOK ON symbols of the 18 OOK ON symbols of the wake-up information. Further, the OFDM receiver only needs to receive the 9-bit wake-up signal to obtain the 18-bit wake-up information.

[0212] In general, in the embodiment shown in (b) of FIG. 13, the network device only needs to send part of the length of the wake-up information as the wake-up signal to the terminal device, and the cover sequences used to generate the part of the length of the wake-up information can indicate the complete length of the wake-up information, thereby reducing the length of the wake-up signal to further reduce the resource overhead.

[0213] Alternatively, compared with the embodiment shown in (b) of FIG. 13, the wake-up signal can include a shorter length of the wake-up information, and the cover sequences used to generate the shorter length of the wake-up information can indicate the remaining wake-up information not included in the wake-up signal, thereby reducing the resource overhead more. In other words, the OOK symbols included in the wake-up signal are used to indicate part of the wake-up information, and the cover sequences used to generate the ON symbols can be used to indicate the remaining wake-up information, and thus the combination of the OOK symbols in the wake-up signal and the cover sequences used to generate the wake-up signal can indicate the complete wake-up information.

[0214] Exemplarily, as shown in (c) of FIG. 13, for the convenience of description, the wake-up information is divided into 3 information blocks (blocks), and each information block contains 6 bits, where the wake-up information is 18 bits. Among them, the 6 cover sequences used to generate each information block can carry 12 bits of information. Further, the wake-up signal can be composed of information block #1. For example, the wake-up signal can be composed of 6 bits of information block #1, and the 6 cover sequences (i.e. cover sequences 1-6) used to generate information block #1 can carry the information in information blocks #2 and #3, and further, the OFDM receiver can combine the OOK symbol contained in information block #1 with the information carried by the 6 cover sequences used to generate information block #1 after receiving the wake-up signal, to obtain the complete 18-bit wake-up information.

[0215] Optionally, in order not to introduce new wake-up signal detection mechanisms, the network device can not start sending from the monitoring occasion (MO) of the wake-up signal when sending the wake-up signal as shown in FIG. 13, but send the wake-up signal after the time length of the preamble. Correspondingly, the terminal device of the terminal type other than the first type does not start receiving the wake-up signal from the monitoring occasion of the wake-up signal when receiving the wake-up signal, but starts receiving the wake-up signal after directly skipping the time length of the preamble. In this way, whether the wake-up signal contains the preamble as shown in FIG. 12 or does not contain the preamble as shown in FIG. 13, the terminal device of the terminal type other than the first type receives only the payload part containing the wake-up information. Further, the start detection time position of the payload of the wake-up signal with and without the preamble can be unified. No additional LP-WUS detection mechanism is introduced for the terminal device of the first type and the terminal device of the second type.

[0216] Optionally, if the OOK receiver or the terminal device of the first type receives the wake-up signal as shown in FIG. 13, it will first detect the preamble part. Since the wake-up signal as shown in FIG. 13 does not contain the preamble part, the OOK receiver cannot detect the preamble, and further, it can be considered that there are the following cases: the wake-up signal in the current monitoring occasion is not sent; the wake-up signal in the current monitoring occasion is not for the OOK receiver. Further, the terminal device using the OOK receiver can stop detecting the wake-up signal to save power consumption, or further detect the information part carried in the wake-up signal to confirm whether the wake-up signal is sent. The present application does not limit the execution action of the terminal device using the OOK receiver after detecting the wake-up signal as shown in FIG. 13.

[0217] Embodiment 2:

[0218] FIG. 14 shows another schematic diagram of a wake-up signal according to an embodiment of the present application. The wake-up signal shown in FIG. 14 is generated by the network device in the communication method 1000 when the terminal type includes the first type. As shown in FIG. 14, the structure of the wake-up signal is the same as that of the wake-up signal shown in FIG. 8, including a preamble and a payload, and the payload part includes complete wake-up information. Specifically, as described in step 910 and shown in FIG. 8, the preamble and the wake-up information of the wake-up signal can include a plurality of OOK symbols. Compared with the embodiment 1, the relative positions of the cover sequences are different, or specifically, the ON symbols of the preamble in the embodiment 2 are also generated by the cover sequences.

[0219] For example, taking the preamble as 6 bits and the wake-up information as 18 bits, as shown in (a) of FIG. 14, the preamble can be generated by 6 cover sequences, and since the wake-up information can be completely carried by 9 cover sequences, the 9 cover sequences (i.e., cover sequences 1-9 shown in the figure) used to generate the first 3 bits of the preamble and the wake-up information can be used to indicate the complete 18 bits of the wake-up information.

[0220] Alternatively, the network device can also generate 9 bits of information from the fourth bit to the twelfth bit of the wake-up information by using the above-mentioned 9 cover sequences (i.e., cover sequences 1-9 shown in the figure), or in other words, repeat carrying the 18 bits of the wake-up information on the cover sequences of the 9 bits of information, so as to improve the receiving performance of the terminal device. For specific scheme description, please refer to the introduction of the embodiment 1.

[0221] Alternatively, in the embodiments of the present application, the last 6 bits of information can also be used, for example, as shown in (b) of FIG. 14, the 6 cover sequences (i.e., cover sequences 10-15) used to generate the last 6 bits of information can carry the check information, such as CRC, of the wake-up signal, so as to improve the reliability of the wake-up signal.

[0222] FIG. 15 shows another schematic diagram of a wake-up signal according to an embodiment of the present application. The wake-up signal shown in FIG. 15 is generated by the network device in the communication method 1000 when the terminal type does not include the first type. As shown in FIG. 15, compared with the wake-up signal shown in FIG. 14, the length of the wake-up signal is shorter, or in other words, when the time length of the wake-up signal shown in FIG. 14 is a first length, the time length of the wake-up signal shown in FIG. 15 is less than the first length.

[0223] As an example, the wake-up information can be 18 bits long. As shown in (a) of FIG. 15, compared with (a) of FIG. 14, the latter part of the wake-up signal shown in (a) of FIG. 14, which is not generated by the cover sequence, can be regarded as redundant resource overhead, and thus the wake-up signal shown in (a) of FIG. 15 can not include the latter part. Specifically, for example, if the length of the preamble is 6 bits and the length of the wake-up information is 18 bits, the length of the wake-up signal shown in FIG. 14 is 24 bits. The wake-up signal shown in (a) of FIG. 15 can be the first 18 bits of the wake-up signal shown in (a) of FIG. 14. In other words, due to the forward shift of the relative position of the cover sequence, the last 6 bits of the wake-up signal shown in (a) of FIG. 14 can be regarded as redundant resource overhead and can not be included in the wake-up signal.

[0224] As shown in (b) of FIG. 15, the wake-up signal can also include only the first part of 9 bits of the 18 bits of information shown in (a) of FIG. 15, or in other words, only the first 9 ON symbols of the 18 ON symbols. Further, the OFDM receiver only needs to receive the 9 bits of the wake-up signal to obtain the 18 bits of the wake-up information. For specific scheme descriptions, refer to the introduction of Embodiment 1.

[0225] As shown in (c) of FIG. 15, similar to (c) of FIG. 13, the length of the wake-up signal can be shorter, that is, the cover sequence used to generate the wake-up signal of the shorter length can indicate the remaining wake-up information not included in the wake-up signal, and thus the resource overhead is reduced more. In other words, the OOK symbols included in the wake-up signal are used to indicate part of the wake-up information, and the cover sequence of the ON symbols used to generate the wake-up signal can be used to indicate the remaining wake-up information, and thus the combination of the OOK symbols in the wake-up signal and the cover sequence used to generate the wake-up signal can indicate the complete wake-up information.

[0226] As an example, it is assumed that the wake-up information can be divided into information blocks #4 of 2 bits in length and information blocks #5 and #6 of 8 bits in length. Further, the wake-up signal can only include the preamble and the information block #4, and the 8 cover sequences of the 8 OOK ON symbols used to generate the preamble and the information block #4 can be used to indicate the information blocks #5 and #6 of 16 bits in total length. Further, the OFDM receiver can determine the complete 18 bits of the wake-up information according to the information block #4 in the received wake-up signal and the 8 cover sequences used to generate the preamble and the information block #4.

[0227] Different from embodiment 1, in embodiment 2, the occasion of sending the wake-up signal by the network device can all start from the monitoring occasion of the wake-up signal, and does not need to pass through the time length of the preamble. The reason is that the wake-up signal in embodiment 2 includes the preamble, and the initial position of the preamble corresponds to the monitoring occasion of the wake-up signal. Correspondingly, the terminal device of the terminal type of the non-first type can use a shorter wake-up signal detection time length to receive the wake-up signal when receiving the wake-up signal. In other words, if the wake-up signal detection time length of the terminal device of the first type is a first length, the detection time length of the wake-up signal of the terminal device of the non-first type is less than the first length, for example, can be the three time lengths less than the first length shown in FIG. 15. In this way, even if the terminal device of the non-first type receives the wake-up signal as shown in FIG. 14, due to the shorter wake-up signal detection time length, the signal with a shorter time length shown in FIG. 15 is finally detected.

[0228] In order to reduce the waste of system overhead caused by the preamble, the application also shows a communication method 1600. FIG. 16 shows a schematic flowchart of the communication method 1600 provided by the embodiment of the application, wherein the method 1600 includes steps S1610 to S1620.

[0229] S1610, the network device generates a corresponding wake-up signal according to the period size of the synchronization signal LP-SS and a preset time length threshold.

[0230] Specifically, when the synchronization signal is periodically sent, the network device can determine the transmission period size of the synchronization signal; when the synchronization signal is non-periodically sent, the network device can take the maximum time interval or the average time interval between multiple synchronization signals as the transmission period size of the synchronization signal.

[0231] Further, the network device can compare the period size of the synchronization signal obtained above with a preset time length threshold, which can be a time length that can meet the time-frequency synchronization requirement of the wake-up receiver. FIG. 17 shows a schematic diagram of step S1610. As shown in FIG. 17, taking the synchronization signal as a periodic signal, the time interval size between the synchronization signals is the period size of the synchronization signal.

[0232] When the period size of the synchronization signal is greater than the preset time length threshold T1, the network device generates a wake-up signal, wherein the wake-up signal needs to include a preamble. In other words, when the period size of the synchronization signal is greater than the preset time length threshold T1, the network device considers that the current period synchronization signal cannot meet the time-frequency synchronization requirement of the wake-up receiver, and thus needs to attach a preamble before each LP-WUS to adjust the frequency and clock of the wake-up receiver according to the preamble.

[0233] When the period size of the synchronization signal is less than the pre-set time length threshold T1, the network device generates a wake-up signal, wherein the wake-up signal does not need to include the preamble, and only needs to include the wake-up information of the payload part. In other words, when the period size of the synchronization signal is less than the pre-set time length threshold T1, the network device considers that the synchronization signal of the current period can meet the time-frequency synchronization requirement of the wake-up receiver, and thus the system overhead caused by the preamble can be saved.

[0234] In step S1620, the network device sends the wake-up signal to the terminal device.

[0235] Correspondingly, the terminal device receives the wake-up signal from the network device.

[0236] The specific scheme of step S1620 can refer to the description of step S920, which will not be repeated here.

[0237] Through the method 1600, the sending scenario of the preamble can be reduced, and the system resource overhead caused by the preamble can be reduced. When the network device does not send the wake-up signal with the preamble, the extra part of the time-frequency resource can be used for sending other NR downlink data and signaling.

[0238] Finally, the apparatus embodiment of the embodiment of the application is introduced.

[0239] In order to realize the functions in the method provided in the application, the communication device such as the terminal device or the network device can include a hardware structure and / or a software module to realize the above-mentioned functions in the form of hardware structure, software module, or hardware structure plus software module. Whether a certain function in the above-mentioned functions is executed in the form of hardware structure, software module, or hardware structure plus software module depends on the specific application and design constraint conditions of the technical solution.

[0240] FIG. 18 is a schematic block diagram of a communication apparatus 1800 according to an embodiment of the application. The communication apparatus 1800 can be a terminal device, or a chip system or module in the terminal device, and is used to implement the method according to the above-mentioned embodiments. The communication apparatus 1800 includes a transceiver unit 1810. The transceiver unit 1810 is exemplarily introduced as follows.

[0241] The transceiver unit 1810 can include a sending unit and a receiving unit. The sending unit is used to execute the sending action of the communication apparatus, and the receiving unit is used to execute the receiving action of the communication apparatus. For the convenience of description, the sending unit and the receiving unit are combined into one transceiver unit in the embodiments of the application. The combination is uniformly described here, and will not be repeated hereinafter.

[0242] When the communication apparatus 1800 is a terminal device, the transceiver 1810 is configured to receive the wake-up signal through a corresponding wake-up signal receiving occasion, or through a corresponding wake-up signal detection duration, according to a terminal type of the terminal device.

[0243] The above description is only exemplary. When the communication apparatus 1800 is a terminal device, it will be responsible for performing the methods or steps in the foregoing method embodiments related to terminal devices.

[0244] Optionally, the communication apparatus 1800 further includes a storage unit (not shown in the figure), configured to store programs or codes for executing the foregoing methods.

[0245] FIG. 19 is a schematic block diagram of a communication apparatus 1900 according to an embodiment of the present application. The communication apparatus 1900 can be a network device, or a chip system or module in a network device, configured to implement the methods in the foregoing embodiments. The communication apparatus 1900 includes a generating unit 1910 and a transceiver 1920.

[0246] When the communication apparatus 1900 is a network device, the generating unit 1910 is configured to generate a corresponding wake-up signal according to a terminal type, and the transceiver 1920 is configured to send the wake-up signal to a terminal device.

[0247] The above description is only exemplary. When the communication apparatus 1900 is a network device, it will be responsible for performing the methods or steps in the foregoing method embodiments related to terminal devices.

[0248] Optionally, the communication apparatus 1900 further includes a storage unit (not shown in the figure), configured to store programs or codes for executing the foregoing methods.

[0249] FIG. 20 is a schematic block diagram of a communication apparatus 2000 according to an embodiment of the present application. The communication apparatus 2000 includes a processor 2010 and a communication interface 2020, which can be connected to each other through a bus 2030. The communication apparatus 2000 can be a network device or a terminal device, etc. that executes the communication methods 900, 1000, 1100 or 1600.

[0250] Optionally, the communication apparatus 2000 further includes a memory 2040. The memory 2040 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or a compact disc read-only memory (CD-ROM). The memory 2040 is used to store relevant instructions and data.

[0251] The processor 2010 can be one or more central processing units (CPUs). In the case where the processor 1210 is a CPU, the CPU can be a single-core CPU or a multi-core CPU.

[0252] When the communication apparatus 2000 is a network device, the communication apparatus 2000 is configured to perform the following operations: generating a corresponding wake-up signal according to a terminal type; and sending the wake-up signal to a terminal device.

[0253] When the communication apparatus 2000 is a terminal device, the communication apparatus 2000 is configured to perform the following operations: receiving a wake-up signal through a corresponding wake-up signal receiving occasion according to a terminal type of the terminal device, or receiving a wake-up signal through a corresponding wake-up signal detection duration according to a terminal type of the terminal device.

[0254] The above description is only exemplary. When the communication apparatus 2000 is a network device or a terminal device, the communication apparatus 2000 is responsible for performing the methods or steps related to the network device or the terminal device in the foregoing method embodiments.

[0255] The above description is only exemplary. The specific content can be referred to the content shown in the foregoing method embodiments. The implementation of each operation of FIG. 20 can also correspond to the description of the corresponding method embodiments shown in FIG. 9, FIG. 10, FIG. 11, and FIG. 16.

[0256] FIG. 21 is a schematic block diagram of a communication apparatus 2100 according to an embodiment of the present application. The communication apparatus 2100 is configured to implement the functions of a network device or a terminal device. Optionally, the communication apparatus 2100 can be a chip system in the network device or the terminal device.

[0257] The communication apparatus 2100 comprises an input / output interface 2120 and a processor 2110. The input / output interface 2120 can be an input / output circuit. The processor 2110 can be a signal processor, a chip, or other integrated circuit that can implement the method of the present application. The input / output interface 2120 is configured to input or output signals or data.

[0258] For example, when the communication apparatus 2100 is a network device, the processor 2110 is configured to generate a corresponding wake-up signal according to the terminal type, and the input / output interface 2120 is configured to send the wake-up signal to the terminal device.

[0259] For example, when the communication apparatus 2100 is a terminal device, the input / output interface 2120 is configured to receive a wake-up signal according to a corresponding wake-up signal receiving occasion or a corresponding wake-up signal detection duration according to the terminal type of the terminal device.

[0260] In one possible implementation, the processor 2110 implements the functions of the network device or the terminal device by executing instructions stored in the memory.

[0261] Optionally, the communication apparatus 2100 further comprises a memory.

[0262] Optionally, the processor and the memory are integrated.

[0263] Optionally, the memory is outside the communication apparatus 2100.

[0264] In one possible implementation, the apparatus 2100 can be a chip system 2200.

[0265] FIG. 22 is a schematic diagram of a chip system 2200 according to an embodiment of the present application. The chip system 2200 (or also referred to as a processing system) comprises a logic circuit 2210 (i.e., a processor 2110) and an input / output interface 2220.

[0266] The logic circuit 2210 can be a processing circuit in the chip system 2200. The logic circuit 2210 can be coupled to a storage unit to invoke instructions in the storage unit, so that the chip system 2200 can implement the methods and functions of the embodiments of the present application. The input / output interface 2220 can be an input / output circuit in the chip system 2200, which outputs information processed by the chip system 2200 or inputs data or signaling information to be processed by the chip system 2200.

[0267] As one solution, the chip system 2200 is configured to implement the operations performed by the network device and the terminal device in the above method embodiments.

[0268] For example, the logic circuit 2210 is configured to implement the operation of generating the wake-up signal performed by the network device in the above method embodiments; and the input / output interface 2220 is configured to implement the operation of sending and / or receiving performed by the network device or the terminal device in the above method embodiments.

[0269] The above description of the communication device is only exemplary and can be used to implement the method described in the above embodiments, and the details can be referred to the description of the above method embodiments, which will not be described here.

[0270] The application further provides a chip comprising a processor, which is configured to call and run instructions stored in a memory, so that a communication device installed with the chip performs the method in any of the above examples.

[0271] The application further provides a chip comprising an input interface, an output interface and a processor, which are connected through internal connection paths, and the processor is configured to execute code in a memory, and when the code is executed, the processor is configured to perform the method in any of the above examples. Optionally, the chip further comprises a memory configured to store a computer program or code.

[0272] The application further provides a processor configured to be coupled with a memory, and configured to perform the method and function of the network device or the terminal device in any of the above embodiments.

[0273] The application provides a computer program product comprising instructions, when the computer program product is run on a computer, the method of the above embodiments is implemented.

[0274] The application further provides a computer program, when the computer program is run on a computer, the method of the above embodiments is implemented.

[0275] The application further provides a computer readable storage medium, which stores a computer program, when the computer program is executed by a computer, the method of the above embodiments is implemented.

[0276] Those skilled in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the application.

[0277] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0278] In several embodiments provided in the present application, the disclosed system, device and method can be implemented in other manners. For example, the described device embodiments are only schematic. The division of the units is only a logical function division. There can be another division manner for the actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0279] The units described as separated components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., can be located in one place or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purposes of the technical solutions of the embodiments of the present application.

[0280] In addition, each functional unit in the embodiments of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0281] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application essentially or partly contribute to the prior art, or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in the embodiments of the present application. The foregoing storage medium includes: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk, and various storage media that can store program codes.

[0282] The above is only a specific implementation of the present application, but the protection scope of the embodiments of the present application is not limited thereto. Any changes or replacements easily thought of by those skilled in the art within the technical scope disclosed in the embodiments of the present application should be covered in the protection scope of the embodiments of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A communication method characterized by comprising: The method is applied to a terminal device or a chip system in the terminal device, and includes: According to a terminal type of the terminal device, receiving a wake-up signal through a corresponding wake-up signal receiving occasion, wherein when the terminal type of the terminal device is a first type, a start time of the wake-up signal receiving occasion is a start time of a monitoring occasion of the wake-up signal, the wake-up signal includes a preamble and a data part, when the terminal type of the terminal device is not the first type, the wake-up signal receiving occasion is a time length of the preamble after the start time of the monitoring occasion of the wake-up signal, the first type is a type of receiving the wake-up signal through envelope detection, the preamble is used for time-frequency synchronization, and the data part carries wake-up information.

2. A communication method characterized by comprising: The method is applied to a terminal device or a chip system in the terminal device, and includes: According to a terminal type of the terminal device, receiving a wake-up signal through a corresponding wake-up signal detection time length, wherein when the terminal type of the terminal device is a first type, the wake-up signal detection time length is a first length, when the terminal type of the terminal device is not the first type, the wake-up signal detection time length is less than the first length, the wake-up signal includes a preamble and a data part, the first type is a type of receiving the wake-up signal through envelope detection, the preamble is used for time-frequency synchronization, and the data part carries wake-up information.

3. The method of claim 2, wherein, An ON symbol in the preamble is generated through a cover sequence.

4. The method according to any one of claims 1 to 3, characterized in that, An ON symbol in the data part is generated through a cover sequence.

5. The method according to any one of claims 1 to 4, characterized in that, When the terminal type is not the first type, the terminal type is a second type, and the second type is a type of receiving the wake-up signal through coherent detection on a cover sequence.

6. A communication method characterized by comprising: The method is applied to a network device or a chip system in the network device, and includes: According to a terminal type, generating a corresponding wake-up signal, wherein when the terminal type includes a first type, the wake-up signal includes a preamble and a data part, when the terminal type does not include the first type, the wake-up signal includes the data part but does not include the preamble, the first type is a type of receiving the wake-up signal through envelope detection, the preamble is used for time-frequency synchronization, and the data part carries wake-up information; Sending the wake-up signal to a terminal device.

7. A communication method characterized by comprising: The method is applied to a network device or a chip system in the network device, and includes: According to a terminal type, generating a corresponding wake-up signal, wherein when the terminal type includes a first type, a time length of the wake-up signal is a first length, when the terminal type does not include the first type, the time length of the wake-up signal is less than the first length, the wake-up signal includes a preamble and a data part, the first type is a type of receiving the wake-up signal through envelope detection, the preamble is used for time-frequency synchronization, and the data part carries wake-up information; Sending the wake-up signal to a terminal device.

8. The method of claim 6, wherein, When the terminal type does not include the first type, the sending of the wake-up signal to the terminal device includes: The transceiver is specifically configured to: send the wake-up signal to the terminal device after a time length of the preamble from a monitoring occasion of the wake-up signal.

9. The method of claim 7, wherein, The ON symbol in the preamble is generated by an envelope sequence.

10. The method according to any one of claims 6 to 9, characterized in that, The ON symbol in the data part is generated by an envelope sequence.

11. A communications device, characterized by The method comprises the following steps: The transceiver is specifically configured to: receive a wake-up signal through a corresponding wake-up signal receiving occasion according to a terminal type of a terminal device, wherein a starting time of the wake-up signal receiving occasion is a starting time of a monitoring occasion of the wake-up signal when the terminal type of the terminal device is a first type, the wake-up signal comprises a preamble and a data part, the wake-up signal receiving occasion is a starting time of the monitoring occasion of the wake-up signal after a time length of the preamble when the terminal type of the terminal device is not the first type, the first type is a type of receiving the wake-up signal through envelope detection, the preamble is used for time-frequency synchronization, and the data part carries wake-up information.

12. A communications device, characterized by The method comprises the following steps: The transceiver is specifically configured to: receive a wake-up signal through a corresponding wake-up signal receiving occasion according to a terminal type of a terminal device, wherein a starting time of the wake-up signal receiving occasion is a starting time of a monitoring occasion of the wake-up signal when the terminal type of the terminal device is a first type, the wake-up signal comprises a preamble and a data part, the wake-up signal receiving occasion is a starting time of the monitoring occasion of the wake-up signal after a time length of the preamble when the terminal type of the terminal device is not the first type, the first type is a type of receiving the wake-up signal through envelope detection, the preamble is used for time-frequency synchronization, and the data part carries wake-up information.

13. A communications device, characterized by The method comprises the following steps: The transceiver is specifically configured to: send the wake-up signal to the terminal device. The method comprises the following steps:

14. A communications device, characterized by The transceiver is specifically configured to: send the wake-up signal to the terminal device. In a case where the terminal type does not include the first type, the transceiver is specifically configured to: The transceiver is specifically configured to: send the wake-up signal to the terminal device after a time length of the preamble from a monitoring occasion of the wake-up signal.

15. The apparatus of claim 13, wherein, The processor is configured to execute programs or instructions, so that the apparatus performs the method in any one of claims 1 to 5. The apparatus comprises the following steps:

16. A communications device, characterized by ​ ​ 17. A communications device, characterized by ​ A processor for executing a program or instructions to cause the apparatus to perform the method of any one of claims 6 to 10.

18. A communication system, characterized by A communication apparatus comprising the communication apparatus of claim 16, the communication apparatus of claim 17.

19. A chip system, characterized by Comprising: A logic circuit for coupling with an input / output interface through which data is transmitted to perform the method of any one of claims 1 to 5, or to perform the method of any one of claims 6 to 10.

20. A computer-readable storage medium, characterized in that, A computer program stored on the computer readable storage medium, which when run on a computer, causes the computer to perform the method of any one of claims 1 to 5, or the method of any one of claims 6 to 10.

21. A computer program product, characterised in that, A computer program code which when run implements the method of any one of claims 1 to 5, or the method of any one of claims 6 to 10.

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