Communication method and communication device

Abstract

The invention provides a communication method and a communication device. The method may comprise: a transmitting end device transmitting a reference signal, the reference signal comprising X OOK symbols, the X OOK symbols comprising X1 first symbols and X2 second symbols, the first symbols indicating a first bit value, the second symbols indicating a second bit value, the first sequence corresponding to the X1 first symbols, X being an integer greater than 1, and X2 being an integer greater than 1; x1 and X2 are integers greater than or equal to 0, and X1 + X2 = X. Thus, the reference signal can be generated through a relatively long sequence (namely the first sequence), and the detection performance of the reference signal can be improved due to the fact that the long sequence has excellent self-correlation performance.

Description

Technical Field

[0001] The present application relates to the field of wireless communications, and more specifically, to a communication method and a communication device. Background Art

[0002] The terminal device can receive the wake-up signal through a separate low-power small circuit, such as a wake-up radio (WUR), and the main receiver can be in a sleep state. When the terminal device detects the wake-up signal through the WUR, the terminal device triggers the wake-up of the main receiver. After the main receiver wakes up, the terminal device can receive data, etc. through the main receiver. When WUR is introduced, how to transmit the reference signal to improve the detection performance of the reference signal is a question worth considering. Summary of the invention

[0003] The present application provides a communication method and a communication device, which can improve the detection performance of a reference signal.

[0004] In a first aspect, a communication method is provided, which can be performed by a communication device. The communication device can be a device (such as a transmitting device, such as a network device), or a component of a device (such as a chip or a chip system or a circuit), which is not limited in this application.

[0005] The method may include: sending a reference signal, the reference signal is generated according to a first sequence, the reference signal includes X on-off keying OOK symbols, the X OOK symbols include X1 first symbols and X2 second symbols, the first symbol indicates a first bit value, the second symbol indicates a second bit value, the first sequence corresponds to the X1 first symbols, X is an integer greater than 1, X1 and X2 are integers greater than or equal to 0, and X1+X2=X.

[0006] Optionally, the method further includes: determining a reference signal, for example, determining a sending time of the reference signal.

[0007] Optionally, the method further includes: determining the first sequence. For example, acquiring the first sequence. For another example, generating the first sequence.

[0008] In a second aspect, a communication method is provided, which can be performed by a communication device. The communication device can be a device (such as a receiving device, such as a terminal device), or a component of a device (such as a chip or a chip system or a circuit), which is not limited in this application.

[0009] The method may include: receiving a reference signal, the reference signal being generated according to a first sequence, the reference signal comprising X on-off keying OOK symbols, the X OOK symbols comprising X1 first symbols and X2 second symbols, the first symbol indicating a first bit value, the second symbol indicating a second bit value, the first sequence corresponding to the X1 first symbols, X being an integer greater than 1, X1 and X2 being integers greater than or equal to 0, and X1+X2=X.

[0010] Optionally, the method further includes: determining a reference signal, for example, determining a sending time of the reference signal.

[0011] Optionally, the method further includes: determining the first sequence. For example, acquiring the first sequence. For another example, generating the first sequence.

[0012] Based on the above technical solution, a reference signal is generated according to a first sequence, which corresponds to X1 OOK symbols in the reference signal. In this way, the reference signal can be generated by a relatively long sequence (i.e., the first sequence). Since the long sequence itself has better autocorrelation performance, the detection performance of the reference signal can be improved.

[0013] In combination with the second aspect, in some implementations of the second aspect, the method further includes: performing correlation processing on the reference signal according to the first sequence.

[0014] In combination with the second aspect, in certain implementations of the second aspect, the correlation processing of the reference signal according to the first sequence includes: obtaining a signal to be processed according to a pattern corresponding to the X OOK symbols; and performing correlation processing on the signal to be processed according to the first sequence.

[0015] In combination with the first aspect or the second aspect, in some implementations, the first sequence includes an X1 segment subsequence, and each segment subsequence in the X1 segment subsequence corresponds to one first symbol.

[0016] Based on the above technical solution, the first sequence can be divided into X1 subsequences, that is, the first sequence can be considered to be composed of X1 subsequences, so that each subsequence corresponds to a first symbol, and thus X1 subsequences correspond to X1 first symbols.

[0017] In combination with the first aspect or the second aspect, in some implementations, the reference signal is generated according to a pattern corresponding to the first sequence and the X OOK symbols.

[0018] Based on the above technical solution, the first sequence can be mapped to different OOK symbols according to the patterns corresponding to the X OOK symbols. Specifically, the positions of X1 first symbols can be identified according to the patterns corresponding to the X OOK symbols, and then the first sequence can be mapped to the X1 first symbols.

[0019] In combination with the first aspect or the second aspect, in some implementations, the pattern corresponding to the X OOK symbols represents: the position and / or order of the X1 first symbols and the X2 second symbols.

[0020] In combination with the first aspect or the second aspect, in some implementations, the length of the first sequence is: N*X1, where N represents the number of frequency domain units occupied by the reference signal.

[0021] In combination with the first aspect or the second aspect, in some implementations, the first sequence is obtained by concatenating L second sequences, where L is not equal to X1, and L is an integer greater than 1.

[0022] Based on the above technical solution, if the length of the reference signal is very long and includes a large number of OOK symbols (for example, hundreds of OOK symbols or even thousands of OOK symbols), the length of the sequence used to generate the reference signal will also be very long. In this way, the complexity of generating the reference signal based on the long sequence will be relatively large, and if the sequence used to generate the reference signal is pre-stored, the longer the sequence length, the higher the storage space requirement may be. Therefore, a second sequence shorter than the first sequence can be generated, or the second sequence can be pre-stored, and then the second sequence can be processed, such as splicing multiple second sequences to obtain a first sequence with a relatively long length.

[0023] In combination with the first aspect or the second aspect, in some implementations, the first sequence is part or all of the second sequence.

[0024] Based on the above technical solution, considering that for reference signals of different lengths, it may be necessary to generate and / or pre-store first sequences of various lengths, which requires a relatively high storage space. Therefore, a second sequence with a relatively long length may be generated and / or pre-stored, and when the reference signal is to be sent, the second sequence with a relatively long length may be processed (such as truncated) according to the length of the reference signal to obtain a first sequence with a relatively short length.

[0025] In combination with the first aspect or the second aspect, in some implementations, the starting position of the first sequence is the starting position of the second sequence; or, the starting position of the first sequence is determined based on the time domain resources occupied by the reference signal.

[0026] In combination with the first aspect or the second aspect, in some implementations, the reference signal occupies P orthogonal frequency division multiplexing OFDM symbols, the first sequence includes P groups of subsequences, the P groups of subsequences correspond to the P OFDM symbols, and each group of subsequences corresponds to one OFDM symbol, the number of subsequences included in each group of subsequences in the P groups of subsequences is greater than or equal to 0, and P is an integer greater than 1 or equal to 1.

[0027] In combination with the first aspect or the second aspect, in some implementations, the P group of subsequences includes the i-th group of subsequences, the i-th group of subsequences corresponds to the i-th OFDM symbol among the P OFDM symbols, and the frequency domain signal of the reference signal in the i-th OFDM symbol is determined based on the positions of the first symbol and the second symbol included in the i-th OFDM symbol, where i is an integer greater than 1 or equal to 1 and less than P or equal to P.

[0028] In combination with the first aspect or the second aspect, in some implementations, the reference signal is sent periodically.

[0029] In combination with the first aspect or the second aspect, in some implementations, the reference signal is a low power synchronization signal LP-SS.

[0030] In combination with the first aspect or the second aspect, in some implementations, the first sequence is any one of the following: a ZC sequence, a GOLD sequence, an m sequence, or a pseudo-random sequence.

[0031] In combination with the first aspect or the second aspect, in some implementations, the frequency domain unit is a resource element or a subcarrier.

[0032] In combination with the first aspect or the second aspect, in some implementations, the signal power of the first symbol is not 0, and the signal power of the second symbol is 0; or, the signal power of the first symbol is greater than or equal to a first threshold, the signal power of the second symbol is less than or equal to a second threshold, and the first threshold is greater than or equal to the second threshold.

[0033] In a third aspect, a communication method is provided, which can be performed by a communication device. The communication device can be a device (such as a transmitting device, such as a network device), or a component of a device (such as a chip or a chip system or a circuit), which is not limited in this application.

[0034] The method may include: sending a reference signal, wherein the reference signal is generated according to a second sequence, the reference signal includes X on-off keying OOK symbols, the X OOK symbols include X1 first symbols and X2 second symbols, the first symbol indicates a first bit value, the second symbol indicates a second bit value, a subsequence of the second sequence corresponds to the X1 first symbols, X is an integer greater than 1, X1 and X2 are integers greater than or equal to 0, and X1+X2=X.

[0035] In a fourth aspect, a communication method is provided, which can be performed by a communication device. The communication device can be a device (such as a receiving device, such as a terminal device), or can be a component of a device (such as a chip or a chip system or a circuit), which is not limited in this application.

[0036] The method may include: receiving a reference signal, the reference signal being generated according to a second sequence, the reference signal including X on-off keying OOK symbols, the X OOK symbols including X1 first symbols and X2 second symbols, the first symbol indicating a first bit value, the second symbol indicating a second bit value, a subsequence of the second sequence corresponding to the X1 first symbols, X being an integer greater than 1, X1 and X2 being integers greater than or equal to 0, and X1+X2=X.

[0037] Based on the above technical solution, considering that for reference signals of different lengths, it may be necessary to generate and / or pre-store first sequences of various lengths, which requires a relatively high storage space. Therefore, a second sequence with a relatively long length may be generated and / or pre-stored, and when the reference signal is to be sent, the second sequence with a relatively long length may be processed (such as truncated) according to the length of the reference signal to obtain a first sequence with a relatively short length.

[0038] In combination with the third aspect or the fourth aspect, in some implementations, the starting position of the sequence used to generate the reference signal is the starting position of the second sequence; or, the starting position of the sequence used to generate the reference signal is determined based on the time domain resources occupied by the reference signal.

[0039] In combination with the third aspect or the fourth aspect, the reference signal is generated according to the second sequence, including: the reference signal is generated according to a subsequence of the second sequence.

[0040] The subsequence of the second sequence (ie, the sequence used to generate the reference signal) may also be referred to as the first sequence. For the first sequence, reference may be made to the related description in the first aspect or the second aspect, which will not be repeated here.

[0041] In a fifth aspect, a communication method is provided, which can be performed by a communication device. The communication device can be a device (such as a transmitting device, such as a network device), or it can be a component of a device (such as a chip or a chip system or a circuit), which is not limited in this application.

[0042] The method may include: sending a reference signal, wherein the reference signal is generated according to a second sequence, the reference signal includes X on-off keying OOK symbols, the X OOK symbols include X1 first symbols and X2 second symbols, the first symbol indicates a first bit value, the second symbol indicates a second bit value, the second sequence corresponds to part of the first symbols among the X1 first symbols, X is an integer greater than 1, X1 and X2 are integers greater than or equal to 0, and X1+X2=X.

[0043] Optionally, one second sequence corresponds to at least two first symbols.

[0044] In a sixth aspect, a communication method is provided, which can be performed by a communication device. The communication device can be a device (such as a receiving device, such as a terminal device), or can be a component of a device (such as a chip or a chip system or a circuit), which is not limited in this application.

[0045] The method may include: receiving a reference signal, the reference signal being generated according to a second sequence, the reference signal including X on-off keying OOK symbols, the X OOK symbols including X1 first symbols and X2 second symbols, the first symbol indicating a first bit value, the second symbol indicating a second bit value, the second sequence corresponding to some first symbols among the X1 first symbols, X being an integer greater than 1, X1 and X2 being integers greater than or equal to 0, and X1+X2=X.

[0046] Based on the above technical solution, if the length of the reference signal is very long and includes a large number of OOK symbols (for example, hundreds of OOK symbols or even thousands of OOK symbols), the length of the sequence used to generate the reference signal will also be very long. In this way, the complexity of generating the reference signal based on the long sequence will be relatively large, and if the sequence used to generate the reference signal is pre-stored, the longer the sequence length, the higher the storage space requirement may be. Therefore, a second sequence shorter than the first sequence can be generated, or the second sequence can be pre-stored, and then the second sequence can be processed, such as splicing multiple second sequences to obtain a first sequence with a relatively long length.

[0047] In combination with the fifth aspect or the sixth aspect, in certain implementations, the sequence used to generate the reference signal is obtained by concatenating L second sequences, where L is not equal to X1, and L is an integer greater than 1.

[0048] In combination with the fifth aspect or the sixth aspect, the reference signal is generated according to the second sequence, including: the reference signal is generated according to at least two second sequences.

[0049] The at least two second sequences (ie, sequences used to generate reference signals) may also be collectively referred to as first sequences. For the first sequence, reference may be made to the related description in the first aspect or the second aspect, which will not be repeated here.

[0050] In a seventh aspect, a communication device is provided, the device being used to execute the method provided in any one of the first to sixth aspects. Specifically, the device may include a unit and / or module, such as a processing unit and / or a communication unit, for executing the method provided in any one of the above implementations of any one of the first to sixth aspects.

[0051] In one implementation, the apparatus is a communication device (such as a terminal device or a network device). When the apparatus is a communication device, the communication unit may be a transceiver or an input / output interface; the processing unit may be at least one processor. Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0052] In another implementation, the device is a chip, a chip system or a circuit used in a communication device. When the device is a chip, a chip system or a circuit used in a device, the communication unit may be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip, the chip system or the circuit; the processing unit may be at least one processor, a processing circuit or a logic circuit.

[0053] In an eighth aspect, a communication device is provided, the device comprising: at least one processor, configured to execute the method provided in any one of the above implementations of any one of the above first to sixth aspects. Optionally, the device further comprises: a memory, configured to store a program; accordingly, the at least one processor is configured to execute a computer program or instruction stored in the memory.

[0054] In one implementation, the apparatus is a communication device (such as a terminal device or a network device).

[0055] In another implementation, the apparatus is a chip, a chip system or a circuit used in a communication device.

[0056] In a ninth aspect, the present application provides a processor for executing the methods provided in the above aspects.

[0057] For the operations such as sending and acquiring / receiving involved in the processor, unless otherwise specified, or unless they conflict with their actual function or internal logic in the relevant description, they can be understood as operations such as processor output and input, or as sending and receiving operations performed by the radio frequency circuit and antenna, and this application does not limit this.

[0058] In a tenth aspect, a computer-readable storage medium is provided, which stores a program code for execution by a device, and the program code includes a method provided by any one of the above-mentioned implementation methods for executing any one of the above-mentioned first to sixth aspects.

[0059] In the eleventh aspect, a computer program product comprising instructions is provided. When the computer program product is run on a computer, the computer executes the method provided by any one of the above-mentioned implementation modes of any one of the above-mentioned first to sixth aspects.

[0060] In the twelfth aspect, a chip is provided, the chip including a processor and a communication interface, the processor reads instructions stored in a memory through the communication interface, and executes a method provided by any one of the above-mentioned implementation methods of any one of the above-mentioned first to sixth aspects.

[0061] Optionally, as an implementation method, the chip also includes a memory, in which a computer program or instructions are stored, and the processor is used to execute the computer program or instructions stored in the memory. When the computer program or instructions are executed, the processor is used to execute the method provided in any one of the above-mentioned implementation methods of any one of the first to sixth aspects.

[0062] In the thirteenth aspect, a communication system is provided, comprising a first communication device and a second communication device. The first communication device is used to execute the method provided in any one of the implementations of the first aspect, and the second communication device is used to execute the method provided in any one of the implementations of the second aspect; or, the first communication device is used to execute the method provided in any one of the implementations of the third aspect, and the second communication device is used to execute the method provided in any one of the implementations of the fourth aspect; or, the first communication device is used to execute the method provided in any one of the implementations of the fifth aspect, and the second communication device is used to execute the method provided in any one of the implementations of the sixth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 is a schematic diagram of a wireless communication system applicable to an embodiment of the present application.

[0064] Figure 2 It is a schematic diagram of the main circuit and wake-up circuit.

[0065] Figure 3 This is a waveform diagram of the signal when it uses OOK modulation.

[0066] Figure 4 This is a schematic diagram of the waveform of the signal after Manchester encoding.

[0067] Figure 5 This is another schematic diagram of the waveform after the signal is Manchester encoded.

[0068] Figure 6 and Figure 7 It is a schematic diagram of OOK symbols in the time domain and frequency domain.

[0069] Figure 8 It is a schematic diagram of OFDM symbols and OOK symbols.

[0070] Fig. 9 It is a schematic diagram of the waveform of the signal after passing through the channel.

[0071] Fig.10 It is a schematic diagram of OFDM symbol.

[0072] Fig.11 It is a schematic diagram of a communication method 1100 provided in an embodiment of the present application.

[0073] Fig.12 is a schematic diagram of a first sequence and a reference signal applicable to an embodiment of the present application.

[0074] Fig.13 is another schematic diagram of a first sequence and a reference signal applicable to an embodiment of the present application.

[0075] Fig.14 is a schematic diagram of a second sequence and a reference signal applicable to an embodiment of the present application.

[0076] Fig.15 and Fig.16 is another schematic diagram of a second sequence and a reference signal applicable to an embodiment of the present application.

[0077] Fig.17 It is a schematic diagram of a receiving device processing a reference signal applicable to an embodiment of the present application.

[0078] Fig.18 It is a schematic block diagram of a communication device 1800 provided in an embodiment of the present application.

[0079] Fig.19 It is a schematic diagram of another communication device 1900 provided in an embodiment of the present application.

[0080] Fig. 20 It is a schematic diagram of a chip system 2000 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0081] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0082] The technical solution provided in this application can be applied to various communication systems, such as: the fifth generation (5th generation, 5G) or new radio (new radio, NR) system, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, etc. The technical solution provided in this application can also be applied to future communication systems, such as the sixth generation (6th generation, 6G) mobile communication system. The technical solution provided in this application can also be applied to device to device (device to device, D2D) communication, vehicle to everything (vehicle-to-everything, V2X) communication, machine to machine (machine to machine, M2M) communication, machine type communication (machine type communication, MTC), and Internet of things (Internet of things, IoT) communication system. The technical solution provided in this application can also be applied to non-terrestrial network (NTN) systems such as intersatellite communication and satellite communication.

[0083] As an example, a satellite communication system includes a satellite base station and a terminal device. The satellite base station provides communication services for the terminal device. The satellite base station can also communicate with the base station. The satellite can be used as a base station or as a terminal device. Among them, the satellite can refer to a drone, a hot air balloon, a low-orbit satellite, a medium-orbit satellite, a high-orbit satellite, etc. The satellite can also refer to a non-ground base station or non-ground equipment, etc.

[0084] As an example, V2X communication may include: vehicle-to-vehicle (V2V) communication, vehicle-to-roadside infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication, and vehicle-to-network (V2N) communication.

[0085] A device in a communication system may send a signal to another device or receive a signal from another device. The signal may include information, signaling, or data, etc. The device may also be replaced by an entity, a network entity, a communication device, a communication module, a node, a communication node, etc., and the present disclosure takes the device as an example for description.

[0086] The terminal devices in the embodiments of the present application include various devices with wireless communication functions, which can be used to connect people, objects, machines, etc. The terminal devices can be widely used in various scenarios, such as: cellular communication, D2D, V2X, peer to peer (P2P), M2M, MTC, IoT, virtual reality (VR), augmented reality (AR), industrial control, automatic driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city drones, robots, remote sensing, passive sensing, positioning, navigation and tracking, autonomous delivery, etc. The terminal device can be a terminal in any of the above scenarios, such as an MTC terminal, an IoT terminal, etc. The terminal device may be a user equipment (UE), terminal, fixed device, mobile station device or mobile device of the third generation partnership project (3GPP) standard, a subscriber unit, a handheld device, a vehicle-mounted device, a wearable device, a cellular phone, a smart phone, a SIP phone, a wireless data card, a personal digital assistant (PDA), a computer, a tablet computer, a notebook computer, a wireless modem, a handheld device, a laptop computer, a computer with wireless transceiver function, a smart book, a vehicle, a satellite, a global positioning system (GPS) device, a target tracking device, an aircraft (such as a drone, a helicopter, a multi-copter, a quadcopter, or an airplane, etc.), a ship, a remote control device, a smart home device, an industrial device, or a device built into the above-mentioned device (for example, a communication module, a modem or a chip in the above-mentioned device, etc.), or other processing devices connected to the wireless modem. For the convenience of description, the terminal device is described below by taking the terminal or UE as an example.

[0087] It should be understood that in some scenarios, the UE can also be used to act as a base station. For example, the UE can act as a scheduling entity that provides sidelink signals between UEs in scenarios such as V2X, D2D or P2P.

[0088] In the embodiment of the present application, the device for realizing the function of the terminal device, i.e., the terminal device, can be the terminal device, or a device capable of supporting the terminal device to realize the function, such as a chip system or a chip, which can be installed in the terminal device. In the embodiment of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0089] The network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be referred to as an access network device or a wireless access network device, such as a base station. The network device in the embodiment of the present application may refer to a wireless access network (RAN) node (or device) that connects a terminal device to a wireless network. Base station can broadly cover various names as follows, or replace with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmission point, master station, auxiliary station, multi-standard wireless (motor slide retainer, MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station can also refer to a communication module, a modem or a chip for being arranged in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs the base station function in D2D, V2X, and M2M communications, a network-side device in a 6G network, or a device that performs the base station function in a future communication system. The base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the network device.

[0090] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0091] In some deployments, the network device mentioned in the embodiments of the present application may be a device including a CU, or a DU, or a device including a CU and a DU, or a control plane CU node (central unit control plane (central unit-control plane, CU-CP)) and a user plane CU node (central unit user plane (central unit-user plane, CU-UP)) and a DU node.

[0092] In the embodiment of the present application, the device for realizing the function of the network device can be a network device, or a device capable of supporting the network device to realize the function, such as a chip system or a chip, which can be installed in the network device. In the embodiment of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0093] The network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons and satellites in the air. The embodiments of the present application do not limit the scenarios in which the network equipment and terminal equipment are located.

[0094] First combine Figure 1 A communication system applicable to an embodiment of the present application is briefly introduced as follows.

[0095] See also Figure 1 , as an example, Figure 1 Schematic diagram of a wireless communication system applicable to an embodiment of the present application. Figure 1 As shown, the wireless communication system includes a wireless access network 100. The wireless access network 100 may be a next generation (e.g., 6G or higher) wireless access network, or a traditional (e.g., 5G, 4G, 3G, or 2G) wireless access network. One or more terminal devices (120a-120j, collectively referred to as 12) may be connected to each other or to one or more network devices (110a, 110b, collectively referred to as 110) in the wireless access network 100. Network elements in the wireless communication system are connected via interfaces (e.g., NG, Xn) or air interfaces.

[0096] When the network device communicates with the terminal device, the network device can manage one or more cells, and a cell can include at least one terminal device. A cell can be understood as an area within the coverage of the wireless signal of the network device.

[0097] Figure 1 This is just a schematic diagram. The wireless communication system may also include other devices, such as core network devices, wireless relay devices and / or wireless backhaul devices. Figure 1 Not drawn in.

[0098] To facilitate understanding of the embodiments of the present application, a brief description of the terms involved in the present application is given.

[0099] 1. Wake-up circuit: also called wake-up receiver (WUR) or low-power wake-up receiver (LP-WUR) or wake-up module, can be understood as a separate low-power small circuit, such as the circuit used by the terminal device in the idle state. The low-power small circuit can be implemented using a separate small circuit or chip with a simple structure, and its power consumption is low. It can be understood that the wake-up circuit is only named for distinction, and its specific naming does not limit the scope of protection of this application. For example, without loss of generality, the wake-up circuit can also be described as the first circuit (or first module). The following is uniformly described as a wake-up circuit.

[0100] The signal received by the terminal device using the wake-up circuit can be said to be transmitted on the wake-up link, where the wake-up link represents a connection relationship between the terminal device and the network device. It is a logical concept rather than a physical entity. It can be understood that the wake-up link is only a name for distinction, and its specific name does not limit the scope of protection of this application. For example, without loss of generality, the wake-up link can also be described as the first link. It is uniformly described as the wake-up link below.

[0101] The signal received by the terminal device using the wake-up circuit can be called a wake-up signal (wake up signal / radio, WUS / WUR) or a low power wake-up signal (low power wake up signal, LP-WUS). It can be understood that the wake-up signal is only named for distinction, and its specific naming does not limit the scope of protection of this application. For example, without loss of generality, the wake-up signal can also be called a signal. The following unified description is a wake-up signal.

[0102] 2. Main circuit: also called main receiver (MR) or main module, it can be understood as the circuit used by the terminal device when transmitting data normally, or the circuit used by the terminal device when transmitting data in a connected state. When the terminal device uses the main circuit to transmit data, the power consumption is relatively large. It can be understood that the main circuit is only named for distinction, and its specific naming does not limit the scope of protection of this application. For example, without loss of generality, the main circuit can also be described as the second circuit (or second module). The following description is uniformly referred to as the main circuit.

[0103] The signal received by the terminal device using the main circuit can be said to be transmitted on the main link, where the main link represents a connection relationship between the terminal device and the network device, which is a logical concept rather than a physical entity. It can be understood that the main link is only named for distinction, and its specific naming does not limit the scope of protection of this application. For example, without loss of generality, the main link can also be described as the second link. The following unified description is the main link.

[0104] In the following, for the purpose of distinction, the signal transmitted by the terminal device using the main circuit is recorded as a data signal.

[0105] See also Figure 2 , as an example, Figure 2 It is a schematic diagram of the main circuit and wake-up circuit.

[0106] like Figure 2 As shown, the terminal device can receive (or detect) a wake-up signal through a wake-up circuit, and the terminal device can receive a data signal through the main circuit. Assume that the terminal device receives a wake-up signal through a wake-up circuit. If the terminal device does not detect a wake-up signal, the wake-up circuit continues to be used to receive the wake-up signal, and the main circuit can be in an off state (or a sleep state); if the terminal device detects a wake-up signal, the wake-up of the main circuit is triggered, that is, the main circuit is in / switched to an on state (or a working state, or an active state). After the main circuit is turned on, the terminal device can transmit data signals through the main circuit.

[0107] 3. On-off key (OOK) modulation: Information is modulated by whether the signal is sent or not. The corresponding wake-up circuit can use the envelope detection method to receive the signal. OOK modulation technology can achieve demodulation with a receiver with very low complexity, so the low power consumption goal of the wake-up circuit can be achieved. In order to ensure power consumption benefits, the wake-up signal can use OOK modulation. It can be understood that the wake-up signal can also use other modulation methods, which are not limited.

[0108] When the signal is modulated using OOK, each bit (ie, the encoded bit) may correspond to a symbol. Equivalently, a symbol may also be called a chip, or other names, which are not limited here.

[0109] For example, when a bit is "1", a signal is sent within the symbol length (i.e., the signal transmission power within the symbol length is not 0); when a bit is "0", no signal is sent within the symbol length (i.e., the signal transmission power within the symbol length is 0). Alternatively, it can be understood that in OOK modulation, if energy is sent, it represents "1", and if no energy is sent, it represents "0".

[0110] For another example, when the bit is "0", a signal is sent within the symbol length (i.e., the signal transmission power within the symbol length is not 0); when the bit is "1", no signal is sent within the symbol length (i.e., the signal transmission power within the symbol length is 0). Alternatively, it can be understood that in OOK modulation, if energy is sent, it represents "0", and if no energy is sent, it represents "1".

[0111] In the following, for the convenience of description, an example is mainly taken as follows: when a bit is "1", a signal is sent within the symbol length; when a bit is "0", no signal is sent within the symbol length.

[0112] In addition, for the convenience of description, if a signal is sent within a symbol, the symbol is recorded as an ON symbol; if no signal is sent within a symbol, the symbol is recorded as an OFF symbol. For example, when the bit is "1", a signal is sent within the symbol length; when the bit is "0", no signal is sent within the symbol length, the ON symbol indicates that the information bit is "1", and the OFF symbol indicates that the information bit is "0". The ON symbol can also be called an ON signal, and the OFF symbol can also be called an OFF signal. For the sake of consistency, the following description uses ON symbols and OFF symbols.

[0113] In addition, the OOK symbol mentioned below means a symbol obtained by OOK modulation. The OOK symbol can be, for example, an ON symbol, or it can also be an OFF symbol. For example, if the information bit is "1", the OOK symbol obtained by OOK modulation is an ON symbol, and if the information bit is "0", the OOK symbol obtained by OOK modulation is an OFF symbol. The OOK symbol can also be called an OOK signal. For uniformity, the OOK symbol is used in the following description.

[0114] See also Figure 3 , as an example, Figure 3 This is a waveform diagram of the signal when it uses OOK modulation.

[0115] As an example, assume that when the bit is "1", a signal is sent within the OOK symbol length; when the bit is "0", no signal is sent within the OOK symbol length, so Figure 3 The waveform shown can represent the four bits "0100", that is, the first one is an OFF symbol, the second one is an ON symbol, and the third and fourth ones are both OFF symbols. Figure 3 As shown, communication systems generally use a certain frequency for transmission, and the transmitted signal needs to be modulated on a carrier. At the receiving end, the receiving end detects the envelope (or energy) of the received signal and determines whether the OOK symbol corresponds to a bit "0" or a bit "1", thereby completing demodulation.

[0116] 4. Manchester coding: It is a bi-phase coding that can represent bit "0" or bit "1" by switching the level between high and low. For example, through Manchester coding, the original bit "0" can be encoded as bit "10", and the original bit "1" can be encoded as bit "01". To distinguish, the bits after the original bit encoding, such as bits "10" and "01", can be called coded bits. When sending a signal, the transmitter can use 2 OOK symbols to send 1 bit of original information. If the original bit "0" is encoded as bit "10" and the original bit "1" is encoded as bit "01", the original bit "0" corresponds to an ON symbol followed by an OFF symbol, and the original bit "1" corresponds to an OFF symbol followed by an ON symbol. When the receiving end demodulates the Manchester-encoded signal, it can compare the relative size of the signal power (or signal amplitude) in two adjacent OOK symbols. If the signal power (or signal amplitude) in the previous OOK symbol is greater than the signal power (or signal amplitude) in the next OOK symbol, the received information bit is considered to be "0", otherwise it is considered to be "1". In this way, it is possible to avoid selecting an absolute threshold for making a decision.

[0117] It can be understood that the above is an exemplary description of the original bit "0" being encoded as bit "10" and the original bit "1" being encoded as bit "01", and this is not limiting. For example, the original bit "0" is encoded as bit "01", and the original bit "1" is encoded as bit "10".

[0118] As an example, the signal may be generated based on an orthogonal frequency division multiplexing (OFDM) transmitter, that is, the signal may be modulated using an OFDM transmitter.

[0119] One possible way is to transmit an OOK symbol within the length of an OFDM symbol, or in other words, an OOK symbol occupies one OFDM symbol. For example, if an ON symbol is to be sent within the length of an OOK symbol, the transmitter can send a certain signal so that the contour of the signal within the length of the OOK symbol is as square as possible; if an OFF symbol is to be sent within the length of an OOK symbol, the transmitter can shut down for a time of the length of an OOK symbol.

[0120] See also Figure 4 , as an example, Figure 4 This is a schematic diagram of the waveform of the signal after Manchester encoding. Figure 4As shown in the figure, the original bits are “0 0 1 0 0 1 0 1 1 0”. Assuming that the original bit “0” is encoded as “10” and the original bit “1” is encoded as “01”, the coded bits after Manchester encoding are “10 10 01 10 10 01 10 01 10”. The waveform is as follows: Figure 4 As shown. The time length corresponding to each coded bit can be considered as the length of an OFDM symbol, that is, an OOK symbol is transmitted within the length of an OFDM symbol, or an OOK symbol occupies one OFDM symbol. When demodulating the signal, the receiving end can compare the relative size of the signal power (or signal amplitude) in two adjacent OOK symbols, and determine the demodulated information bit based on the comparison result.

[0121] In the above method, one OOK symbol is transmitted within the length of one OFDM symbol. The method is simple, but the supported data rate is also relatively low. Because in the above method, no matter how large the signal bandwidth is, one OOK symbol is transmitted within the length of one OFDM symbol. If the sub-carrier space (SCS) used by the system is 30kHz, the length of a slot is 0.5ms, and one slot contains 14 OFDM symbols, in this case, assuming that no coding is used, each OOK symbol carries 1 bit of information, then the maximum supported data rate is 1 / 0.5*14*1000=28kbps.

[0122] In order to increase the data rate of the OOK symbol, one possible approach is to shorten the length of the OOK symbol, that is, to transmit at least two OOK symbols within the length of one OFDM symbol, or at least two OOK symbols occupy one OFDM symbol.

[0123] See also Figure 5 , as an example, Figure 5 This is another schematic diagram of the waveform of the signal after Manchester encoding. Figure 5 As shown in the figure, the original bit is "0 0 0 1". Assuming that the original bit "0" is encoded as "10" and the original bit "1" is encoded as "01", the encoded bits after Manchester encoding are "10 10 10 10 01". The waveform is as follows: Figure 5 As shown. Among them, in an OFDM symbol length ( Figure 5 In the example, 8 OOK symbols are sent within 2192 sampling points, which are ON symbol-OFF symbol-ON symbol-OFF symbol-ON symbol-OFF symbol-OFF symbol-ON symbol. When the receiving end demodulates the signal, it can compare the relative size of the signal power (or signal amplitude) of two adjacent OOK symbols and determine the demodulated information bits based on the comparison result.

[0124] In order to generate the above waveform, a possible implementation method is to first determine the target waveform x in the time domain, and then perform some operations, such as discrete Fourier transformation (DFT) and inverse fast Fourier transform (IFFT), to obtain the sequence to be sent.

[0125] See also Figure 6 and Figure 7 , as an example, Figure 6 and Figure 7 This is a schematic diagram of OOK symbols in the time domain and frequency domain. Figure 6 As shown, assuming that you want to generate an "ON symbol-OFF symbol-ON symbol-OFF symbol" waveform, you can set the target waveform to: x = [1,1,…,1,0,0,…,0,1,1,…,1,0,0,…,0], or, That is, the amplitude of part of the ON symbol is 1, and the phase of part of the ON symbol can be inconsistent, such as Figure 6 As shown. Figure 7 As described above, DFT can be performed on x to obtain a frequency domain sequence y corresponding to x; y is then mapped to a frequency resource (such as a frequency resource corresponding to a wake-up signal); IFFT is then performed on the frequency domain signal; and a cyclic prefix (CP) is added to the signal after IFFT to obtain a sequence x' to be transmitted (see Figure 6 ). Figure 6 As can be seen from the figure, the shapes of x and x' are similar, so at least two OOK symbols can be transmitted within the length of one OFDM symbol.

[0126] 5. Sequence on top of OOK or overlaid sequence over OOK: In order for the OFDM transmitter to generate an OOK waveform, a specific sequence can be used or constructed to make the final signal form a shape similar to an ON symbol or an OFF symbol (that is, the signal energy / amplitude is high at some time positions, and the signal energy / amplitude is low at some time positions).

[0127] One possible implementation method is to receive the signal by envelope detection or energy detection. For example, the signal received by the receiver (to distinguish, it is called OOK receiver) first passes through the matching network and radio frequency (RF) filter to filter out the out-of-band noise / interference; then the spectrum is moved to the baseband (BB) through the mixer, and the out-of-band noise / interference is further filtered out by the baseband filter; then the signal is subjected to envelope detection / energy detection (at this time, the value of the baseband signal is mathematically expressed as a real number, with only amplitude but no phase). Specifically, the OOK receiver can determine whether the received signal is an ON symbol or an OFF symbol by detecting the energy level in different time ranges, and then perform subsequent processing. However, this reception method is greatly affected by in-band noise or interference. Since the OOK receiver only determines the energy level and does not distinguish the source of energy, the noise (such as in-band noise) and / or interference energy that is not filtered out by the filter will also be regarded as the energy of the useful signal. This affects the judgment of the ON symbol / OFF symbol. In order to further improve the demodulation performance, a more advanced receiver may be considered, such as a receiver with in-phase (I) / quadrature (Q) paths (referred to as an OFDM receiver for distinction).

[0128] In one possible implementation, the signal received by the OFDM receiver first passes through a matching network and a radio frequency filter to filter out out-band noise / interference; then the spectrum is moved to the baseband through a mixer. When the spectrum is moved to the baseband, the I and Q branches are distinguished (the corresponding mixing signals have a phase difference of pi / 2), and the signal on each branch is further filtered out of the out-band noise / interference through a baseband filter; then the two signals are merged together, and the value of the baseband signal is mathematically expressed as a complex number, with both amplitude and phase; then the baseband signal is further processed.

[0129] When an OFDM receiver is used to receive the aforementioned OOK symbol, since the OFDM receiver has the ability to detect the signal phase, the OFDM receiver can further detect the sequence information inside the ON symbol of the OOK symbol. For example, if the OFDM receiver is able to know in advance (for example, the protocol is predefined, or the network device pre-configures relevant parameters to the terminal device) the specific information of the sequence for generating the ON symbol, the OFDM receiver can generate a local sequence based on the sequence for generating the ON symbol, and correlate the received signal with the local sequence to reduce the impact of noise (such as in-band noise) and / or interference that is not filtered out by the filter, thereby improving the demodulation performance. Alternatively, if there may be multiple sequences for generating the ON symbol, the OFDM receiver can detect which sequence is sent to obtain more information. For example, assuming that there may be 4 sequences for generating the ON symbol, each sequence corresponds to the information {00, 01, 10, 11}, the OFDM receiver can obtain an additional 2 bits of information by detecting which sequence is used. This can increase the data rate carried by the wake-up signal. The above method of "letting the OFDM receiver know the information of the sequence used to generate OOK symbols, thereby improving demodulation performance and / or increasing data rate" can be called sequence on top of OOK or overlaid sequence over OOK. An example is given below.

[0130] See also Figure 8 , as an example, Figure 8 This is a schematic diagram of OFDM symbols and OOK symbols. Assuming that each OFDM symbol contains 4 OOK symbols, when Manchester coding is used, there may be Figure 8 The four cases shown. Taking sending "1010" as an example, the position of "1" is set to a specific sequence, and the position of "0" is set to 0, and the time domain sequence corresponding to the entire OFDM symbol is obtained; then the corresponding frequency domain sequence is obtained through some algorithms (for example, through DFT, or least squares (LS) algorithm, etc.); the frequency domain sequence is mapped to the frequency domain resource corresponding to the wake-up signal to obtain the frequency domain signal; finally, the frequency domain signal (and other NR downlink frequency domain signals) are IFFTed to obtain the signal to be sent.

[0131] In order to avoid complex operations (such as generating time domain sequences, performing DFT or least squares calculations) every time a signal is generated, the network device can store the generated frequency domain sequences in advance. Figure 8As shown, there are four possible signal transmission situations in one OFDM symbol. Therefore, four possible frequency domain sequences can be pre-stored at the network device. The network device can select one of the four possible frequency domain sequences to use according to the OOK information that needs to be sent in each OFDM symbol. In this way, it can be seen that the "specific sequence" used to generate the OOK ON symbol is the same. At the receiving end, for an OOK receiver, the energy level in each OOK symbol can be determined for demodulation; for an OFDM receiver, the sequence can be detected to improve demodulation performance and / or increase data rate.

[0132] 6. Low-power synchronization signal (LP-SS): It can be used to realize synchronization function and can also be used to realize RRM measurement function.

[0133] After the signal passes through the channel, it may be distorted due to the influence of the channel state, etc. Figure 3 Take the OOK modulation waveform shown as an example. Figure 3 The waveform shown may become as follows at the receiving end: Fig. 9 The waveform shown.

[0134] See also Fig. 9 , as an example, Fig. 9 It is a schematic diagram of the waveform of the signal after it passes through the channel. In order to determine whether the signal corresponds to bit "0" or bit "1", the terminal device can compare the received signal level value with a threshold (the threshold is as follows Fig.11 For example, if the signal level value received by the terminal device is greater than the threshold, it means that the signal corresponds to bit "1"; if the signal level value received by the terminal device is less than the threshold, it means that the signal corresponds to bit "0". Fig. 9 As shown, if the time position at which the terminal device compares the received signal level value with the threshold is within the range of t2, the judgment is accurate; if the time position at which the terminal device compares the received signal level value with the threshold is within the range of t1 or t3, the judgment is inaccurate, that is, 1 will be mistakenly judged as 0.

[0135] Therefore, when the terminal device uses the wake-up circuit to receive the wake-up signal, in order to correctly receive the wake-up signal, it is necessary to obtain the time synchronization of the wake-up link. That is, the terminal device can obtain the boundary position of a symbol, and select the time position of the signal corresponding to 0 or 1 according to the boundary position. For example, the terminal device can use the level value in the middle position of the symbol to determine whether the signal corresponds to 0 or 1. In addition, due to the limited accuracy of the local clock of the terminal device, time drift may occur. If the wake-up link does not provide a synchronization function, after the terminal device works on the wake-up link for a period of time, it is likely that the terminal device and the network device will have a time asynchronism problem (that is, the symbol boundary positions considered by the terminal device and the network device are inconsistent), thereby affecting signal reception.

[0136] In order to support the synchronization function, LP-SS may be introduced. Specifically, the terminal device may complete the synchronization function based on the LP-SS. As an example, the LP-SS is sent periodically.

[0137] As an example, the modulation mode of LP-SS is OOK. In addition, the pattern (or mode or pattern) of ON symbol / OFF symbol of LP-SS can follow a specific order to enhance its detection performance. For example, LP-SS can be generated based on a binary sequence with good autocorrelation characteristics. Among them, the modulation mode of LP-SS is OOK, which can also be replaced by: in the time interval corresponding to LP-SS, some time domain positions have energy, and some time domain positions have no energy.

[0138] As an example, an OFDM receiver can be used to receive LP-SS. In addition, if the OFDM receiver can know in advance the sequence information used to generate each OOK symbol of LP-SS, the received LP-SS can be correlated with the local sequence to reduce the impact of noise / interference and improve synchronization accuracy. A possible implementation method can generate LP-SS in a manner similar to the above OOK symbol generation method.

[0139] See also Fig.10 , as an example, Fig.10 is a schematic diagram of OFDM symbols. Fig.10 As shown, at each ON symbol position, the same sequence (such as a complex sequence) can be used to regenerate the signal in each OFDM symbol occupied by the LP-SS. It can be understood that an LP-SS will occupy multiple OOK symbols and multiple OFDM symbols. As mentioned above, the ON symbol / OFF symbol pattern corresponding to the OOK symbol (abbreviated as the pattern corresponding to the OOK symbol) can be a binary sequence with good autocorrelation. Fig.10 In the expression, 1 / 0 is used. Fig.10It can be seen that the pattern corresponding to the OOK symbol is a relatively coarser sequence, and each element in the sequence corresponds to an OOK symbol. The sequence that generates LP-SS (for distinction, called the sequence corresponding to LP-SS) is a sequence that generates an OOK symbol (i.e., an ON symbol), in other words, a sequence inside an OOK symbol. Each element in the sequence corresponding to LP-SS corresponds to a part of an OOK symbol. Therefore, the sequence corresponding to LP-SS is a relatively finer sequence. For the OFF symbol, as an example, an "all 0" sequence can be used.

[0140] Generally speaking, the autocorrelation performance and resistance to interference noise of a sequence are related to the length of the sequence. Generally speaking, the longer the length of the sequence, the better the autocorrelation performance and the stronger the resistance to interference noise. A possible implementation method is to generate LP-SS in the above manner. If the above method is used, the same sequence is used to generate the signal in each OFDM symbol occupied by LP-SS at the position of each ON symbol, that is, the same "specific sequence" is used to generate LP-SS in each ON symbol. Limited by the length of the ON symbol and the LP-SS bandwidth, the length of the "specific sequence" will not be particularly long, so the detection performance of the OFDM receiver for LP-SS will also be limited. For example, assuming that each OFDM symbol contains 4 OOK symbols and the LP-SS bandwidth is N resource elements (RE), the length of the "specific sequence" (or "all-0 sequence") can be N / 4, and the total length of the sequence corresponding to the four OOK symbols (each OOK symbol uses either a "specific sequence" or an "all-0 sequence") is N, which can match the bandwidth of LP-SS (N REs) in the DFT operation.

[0141] Based on this, we can consider generating LP-SS based on a relatively long sequence. For example, the transmitting device can divide the long sequence into several small segments, and each small segment corresponds to a different OOK symbol; the receiving device cascades each small segment and correlates it with the local sequence. Since the long sequence itself has better autocorrelation performance, it can improve the detection performance of LP-SS. This solution will be introduced in detail later.

[0142] It should be noted that in this application, "indication" may include direct indication, indirect indication, explicit indication, and implicit indication. When describing that a certain indication information is used to indicate A, it can be understood that the indication information carries A, directly indicates A, or indirectly indicates A.

[0143] In the present application, the information indicated by the indication information is referred to as the information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated can also be indirectly indicated by indicating other information, wherein there is an association relationship between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information can also be achieved by means of the arrangement order of each information agreed in advance (for example, specified by the protocol), thereby reducing the indication overhead to a certain extent. In addition, the information to be indicated can be sent as a whole, or it can be divided into multiple sub-information and sent separately, and the sending period and / or sending time of these sub-information can be the same or different.

[0144] In addition, in the present application, the expression " / " is used to indicate that the objects associated with each other are in an "or" relationship; for example, A / B can represent: A or B. The expression "and / or" is used to indicate that the objects associated with each other can be in an and relationship or an or relationship; for example, A and / or B can represent the following situations: A exists alone, B exists alone, and A and B exist at the same time, where A and B can be single or multiple. "At least one of the following" or similar expressions are used to indicate any combination of the listed items; for example, at least one of A, B and / or C can represent the following situations: A exists alone, B exists alone, C exists alone, A and B exist at the same time, B and C exist at the same time, A and C exist at the same time, and A, B and C exist at the same time, where A, B, C can be single or multiple.

[0145] The method provided by the embodiment of the present application will be described in detail below in conjunction with the accompanying drawings. The embodiment provided by the present application can be applied to the scenarios shown in the above figures without limitation.

[0146] See also Fig.11 , as an example, Fig.11 1 is a schematic diagram of a communication method 1100 provided in an embodiment of the present application. For ease of description, the following is an exemplary description taking the execution subject of method 1100 as a sending end device (such as a terminal device, or a network device) as an example. It can be understood that the execution subject of method 1100 can also be a component of the sending end device, such as a chip or a chip system or a circuit, which is not limited to this. The steps described below as being executed by a single execution subject can also be divided into being executed by multiple execution subjects, and these execution subjects can be logically and / or physically separated. Fig.11 The illustrated method 1100 may include the following steps.

[0147] The method 1100 includes step 1120. Optionally, the method 1100 includes step 1110.

[0148] 1110. The transmitting device determines a reference signal.

[0149] The reference signal is generated according to a first sequence, the reference signal includes X OOK symbols, the X OOK symbols include X1 first symbols and X2 second symbols, the first symbol indicates a first bit value, the second symbol indicates a second bit value, and the first sequence corresponds to X1 first symbols.

[0150] Wherein, X is an integer greater than 1, X1 and X2 are integers greater than or equal to 0, and X1+X2=X.

[0151] The reference signal is generated according to the first sequence, which may also be replaced by: the reference signal is determined according to the first sequence.

[0152] The first sequence corresponds to X1 OOK symbols, indicating that the X1 first symbols in the reference signal are generated (or determined) based on the first sequence. Therefore, the reference signal can also be expressed as: the reference signal includes X OOK symbols, the X OOK symbols include X1 first symbols and X2 second symbols, the first symbol indicates a first bit value, the second symbol indicates a second bit value, and the X1 first symbols are generated according to the first sequence.

[0153] As an example, determining the reference signal includes: determining a transmission time of the reference signal, or generating the reference signal, or acquiring a pre-stored reference signal from a memory.

[0154] The first bit value and the second bit value are different. In one example, the first bit value is "1" and the second bit value is "0". In another example, the first bit value is "0" and the second bit value is "1". In the following embodiments, for ease of description, the first bit value is "1" and the second bit value is "0".

[0155] by Figure 3 Taking the example shown as an example, the reference signal includes 4 OOK symbols, the 4 OOK symbols include two first symbols and two second symbols, and the first OOK symbol and the third OOK symbol are first symbols, and the first bit value indicated by the first symbol is "1"; the second OOK symbol and the fourth OOK symbol are second symbols, and the second bit value indicated by the second symbol is "0".

[0156] The signal power of the first symbol is different from the signal power of the second symbol, and the signal power of the first symbol is greater than the signal power of the second symbol.

[0157] In one example, the signal power of the first symbol is not 0, and the signal power of the second symbol is 0. Based on this, it can be known that the modulation method of the reference signal is OOK modulation. Among them, the signal power of the first symbol is not 0, which means that the signal amplitude of the first symbol is not 0, that is, a signal is sent within a time unit (such as within an OOK symbol). The signal power of the second symbol is 0, which means that the signal amplitude of the second symbol is 0, that is, no signal is sent within a time unit (such as within an OOK symbol).

[0158] In another example, the signal power of the first symbol is greater than or equal to the first threshold, the signal power of the second symbol is less than or equal to the second threshold, and the first threshold is greater than or equal to the second threshold. Due to the non-ideal characteristics of electronic devices, even if the signal power to be transmitted is 0, the actual signal power transmitted may be greater than 0. Therefore, when the signal power of the second symbol is less than or equal to the second threshold, it can be approximately considered that the signal power of the second symbol is 0. Based on this, it can be known that the modulation method of the reference signal is OOK modulation.

[0159] The first symbol may also be referred to as an ON symbol, and the second symbol may also be referred to as an OFF symbol. Regarding the ON symbol and the OFF symbol, please refer to the description in the previous term explanation section and will not be repeated here.

[0160] As an example, the reference signal is a synchronization reference signal, such as the reference signal is LP-SS.

[0161] As an example, the first sequence is any of the following: ZC sequence, GOLD sequence, m sequence, pseudo-noise (PN) sequence. It can be understood that the specific manner of the first sequence is not limited, for example, any sequence with autocorrelation characteristics is applicable to the embodiments of the present application.

[0162] 1120. The transmitting device sends a reference signal.

[0163] As an example, the reference signal is sent periodically.

[0164] As an example, sending a reference signal includes: sending the reference signal at a sending time of the reference signal, or sending the reference signal according to the sending time of the reference signal. Specifically, the transmitting end device determines the sending time of the reference signal, and then sends the reference signal at the sending time of the reference signal, or sends the reference signal according to the sending time of the reference signal.

[0165] Accordingly, the receiving end device receives the reference signal.

[0166] In one example, the transmitting end device is a network device, and the receiving end device is a terminal device. In this case, the reference signal is a downlink reference signal.

[0167] In another example, the transmitting end device is a terminal device and the receiving end device is a network device. In this case, the reference signal is an uplink reference signal.

[0168] Through the embodiments of the present application, a reference signal is generated according to a first sequence, and the first sequence corresponds to X1 OOK symbols in the reference signal. In this way, the reference signal can be generated by a sequence (such as a relatively long sequence). Since the long sequence itself has better autocorrelation performance, the detection performance of the reference signal can be improved.

[0169] Optionally, the receiving end device processes the reference signal.

[0170] In one possible scenario, the receiving end device performs time synchronization according to the reference signal, such as determining downlink timing. The receiving end device performs time synchronization according to the reference signal, which may include: the receiving end device performs correlation processing on the reference signal according to the first sequence, and performs time synchronization according to the result of the correlation processing.

[0171] As an example, the receiving end device performs correlation processing on the reference signal according to the first sequence. For example, the receiving end device obtains the signal to be processed according to the pattern corresponding to X OOK symbols; and performs correlation processing on the signal to be processed according to the first sequence. For example, the receiving end device determines the local sequence according to the first sequence, and then performs correlation processing on the local sequence and the signal to be processed. Among them, the receiving end device determines the local sequence according to the first sequence, which may include, for example: the receiving end device processes the first sequence (such as spread spectrum processing, such as oversampling processing, etc.) to obtain the local sequence. It can be understood that the local sequence is only a description for distinction, and its naming does not limit the scope of protection of the embodiments of the present application. It can also be understood that in some cases, the local sequence may also be the first sequence, which is not limited.

[0172] The pattern corresponding to the X OOK symbols, or the pattern corresponding to the first symbol / the second symbol, may represent (or indicate, or identify) the position distribution of each OOK symbol in the X OOK symbols, or may represent (or indicate, or identify) the position distribution of the first symbol and / or the second symbol in the X OOK symbols. As an example, the pattern corresponding to the X OOK symbols represents the position and / or order of X1 first symbols and X2 second symbols.

[0173] In another possible scenario, the receiving device performs radio resource management (RRM) measurement (RRM measurement) based on the reference signal. As an example, RRM measurement (or also called cell measurement) includes serving cell measurement and neighbor cell measurement. As an example, neighbor cell measurement includes: intra-frequency measurement, inter-frequency measurement and inter-radio access technology (inter-RAT) measurement.

[0174] Optionally, the first sequence includes X1 subsequences, and each subsequence in the X1 subsequences corresponds to a first symbol.

[0175] Among them, each subsequence in the X1 subsequences corresponds to a first symbol, that is, the subsequence and the first symbol are in one-to-one correspondence. In other words, the X1 subsequences and the X1 first symbols are in one-to-one correspondence.

[0176] Based on this, the first sequence can be divided into X1 subsequences, that is, the first sequence can be considered to be composed of X1 subsequences, so that each subsequence corresponds to a first symbol, and thus X1 subsequences correspond to X1 first symbols.

[0177] See also Fig.12 , as an example, Fig.12 is a schematic diagram of a first sequence and a reference signal applicable to an embodiment of the present application. Fig.12 As shown, the reference signal includes multiple OOK symbols, and the first sequence corresponds to the multiple OOK symbols. Specifically, the first sequence corresponds to the first symbol in the multiple OOK symbols. Fig.12 In the OOK symbol, "1" indicates that a signal is sent in the OOK symbol, that is, the OOK symbol is an ON symbol; "0" indicates that no signal is sent in the OOK symbol, that is, the OOK symbol is an OFF symbol. Fig.12 As shown, the first sequence can be divided into multiple subsequences, each subsequence corresponds to an OOK symbol, specifically, each subsequence corresponds to an ON symbol. For the OFF symbol, no processing may be performed or filled with 0, which is not limited.

[0178] Optionally, the reference signal is generated according to a pattern corresponding to the first sequence and X OOK symbols.

[0179] For example, Fig.12For example, the transmitting end device can map the first sequence to different OOK symbols according to the pattern corresponding to the X OOK symbols. Specifically, the positions of X1 first symbols can be identified according to the pattern corresponding to the X OOK symbols, and then the first sequence can be mapped to the X1 first symbols.

[0180] Optionally, the length of the first sequence is N*X1, where N represents the number of frequency domain units occupied by the reference signal.

[0181] In the frequency domain, resources may include one or more frequency domain units. As an example, a frequency domain unit may be a resource element (RE), a resource block (RB), a subcarrier, a resource block group (RBG), a subband, a precoding resource block group (PRG), a bandwidth part (BWP), or a carrier, or a serving cell, etc.

[0182] As an example, the reference signal may be sent via an OFDM transmitter.

[0183] Optionally, the reference signal occupies P OFDM symbols, the first sequence includes P groups of subsequences, the P groups of subsequences correspond to P OFDM symbols, and each group of subsequences corresponds to one OFDM symbol. Based on this, the first sequence (i.e., the X1 segment subsequence) can be divided into P groups of subsequences, that is, the first sequence can be considered to be composed of P groups of subsequences, so that each group of subsequences can correspond to one OFDM symbol, and thus P groups of subsequences correspond to P OFDM symbols.

[0184] The number of subsequences included in each of the P groups of subsequences is greater than or equal to 0, and P is an integer greater than or equal to 1. The total number of subsequences included in each of the P groups of subsequences is X1. For example, if the i-th group contains a i The total number of subsequences included in each group of subsequences in the P group of subsequences is X1:

[0185] As an example, the number of subsequences included in each group of subsequences may depend on the number of first symbols in the OFDM symbol corresponding to the group of subsequences.

[0186] See also Fig.13 , as an example, Fig.13 is another schematic diagram of the first sequence and the reference signal applicable to the embodiment of the present application. Fig.13As shown, the length of the first sequence is N*X1, and the reference signal occupies P OFDM symbols, so the first sequence can be divided into P groups of subsequences, and each group of subsequences can correspond to one OFDM symbol. Fig.13 As shown, the first OFDM symbol includes 2 first symbols, so the first group of subsequences corresponding to the first OFDM symbol includes 2 subsequences. The Pth OFDM symbol includes 3 first symbols, so the Pth group of subsequences corresponding to the Pth OFDM symbol includes 3 subsequences.

[0187] Further optionally, the P group of subsequences includes the i-th group of subsequences, the i-th group of subsequences corresponds to the i-th OFDM symbol in the P OFDM symbols, and the frequency domain signal of the reference signal in the i-th OFDM symbol is determined according to the positions of the first symbol and the second symbol included in the i-th OFDM symbol, where i is an integer greater than 1 or equal to 1 and less than P or equal to P. Based on this, the frequency domain signal in the i-th symbol, that is, the frequency domain signal within the reference signal bandwidth, can be determined according to the positions of the first symbol and the second symbol in the i-th OFDM symbol.

[0188] Optionally, the method 1100 further includes: the transmitting end device determines a first sequence. Based on this, the transmitting end device may generate (or determine) a reference signal according to the first sequence, and then send the reference signal.

[0189] As an example, the transmitting device determines the first sequence, including the following implementation methods.

[0190] In a first possible implementation manner, a transmitting device generates a first sequence.

[0191] Based on this implementation, the transmitting end device may generate the first sequence according to actual communication conditions, such as according to the reference signal actually to be transmitted.

[0192] As an example, the transmitting end device may determine the length of the first sequence according to the bandwidth of the reference signal to be transmitted (such as the number of frequency domain units occupied) and the number of first symbols included in the reference signal (ie, X1), and then generate the first sequence. Fig.13 For example, assuming that the reference signal bandwidth is N REs, and the number of ON symbols in the X OOK symbols of the reference signal is X1, the transmitting end device generates a first sequence with a length of W, and W=N*X1. Taking the ZC sequence as an example, the largest prime number less than or equal to W (or the smallest prime number greater than or equal to W) can be found, represented by W'; a ZC sequence with a length of W' is generated, and the length is supplemented to W (or shortened to W) by cyclic shifting.

[0193] In a second possible implementation manner, the transmitting device obtains (or reads) the first sequence.

[0194] Optionally, the first sequence is predefined, or preconfigured, or pre-agreed, or pre-stored.

[0195] In one example, the first sequence is predefined, preconfigured, or pre-agreed, and the transmitting device can directly obtain the first sequence when determining to transmit a reference signal; or, the transmitting device can select a suitable first sequence according to actual communication conditions, such as according to the actual reference signal to be transmitted.

[0196] In another example, the first sequence can be pre-stored on the transmitting device side, and the transmitting device can directly read the first sequence when determining to transmit a reference signal; or, the transmitting device can select a suitable first sequence according to actual communication conditions, such as according to the actual reference signal to be transmitted.

[0197] In another example, the first sequence can be pre-stored on the other device side, and the transmitting device can obtain the first sequence from the other device side when determining to transmit a reference signal; or, the transmitting device can select a suitable first sequence from the other device side according to the actual communication situation, such as the reference signal actually to be transmitted.

[0198] It can be understood that the above implementation is an example, and the embodiments of the present application are not limited thereto, and any method that enables the transmitting end device to obtain the first sequence is applicable to the embodiments of the present application. For example, when the transmitting end device wants to transmit a reference signal, it can request the first sequence from other devices, and the other devices provide the first sequence to the transmitting end device.

[0199] In the embodiments of the present application, for ease of description, the sequence corresponding to the X1 first symbols is referred to as the first sequence. In actual communication, the first sequence can be obtained directly, such as in the above two ways; or it can be obtained according to other sequences (referred to as the second sequence for distinction). For example, taking the above two implementations as an example, the transmitting device can generate or obtain a second sequence, and then determine the sequence corresponding to the X1 first symbols in the reference signal (i.e., the first sequence) or the sequence used to generate the reference signal (i.e., the first sequence) according to the second sequence.

[0200] The second sequence represents a sequence corresponding to the reference signal. For example, the reference signal is generated based on a subsequence of the second sequence. In this case, for the convenience of description, the partial sequence is referred to as the first sequence. For another example, the reference signal is generated based on multiple second sequences. In this case, for the convenience of description, the multiple second sequences are collectively referred to as the first sequence. For another example, the reference signal is generated based on one second sequence. In this case, the second sequence can also be referred to as the first sequence. The above scheme is described in detail below.

[0201] In actual communication, the length of the reference signal is not fixed. For example, it may be longer in some cases and shorter in others. Based on this, the following two situations may occur:

[0202] Case 1: The length of the second sequence corresponds to the length of the reference signal. In this case, the second sequence is the first sequence.

[0203] Case 2: The length of the second sequence does not correspond to the length of the reference signal, such as the length of the second sequence corresponds to a portion of the length of the reference signal, or another example is that a portion of the length of the second sequence corresponds to the length of the reference signal. In this case, the first sequence may be a sequence obtained by processing the second sequence.

[0204] The following is an explanation of the above two situations respectively.

[0205] Case 1: The length of the second sequence corresponds to the length of the reference signal.

[0206] In this case, the first sequence is the second sequence, that is, the transmitting end device directly generates the first sequence, or the first sequence is predefined, preconfigured, or pre-agreed.

[0207] For example, assuming that the reference signal bandwidth is N REs, the number of ON symbols in the X OOK symbols of the reference signal is X1, the length of the second sequence (ie, the first sequence) is W, and W=N*X1. Fig.13 As shown, the length of the second sequence (ie, the first sequence) is W=N*X1, so the first sequence is the second sequence.

[0208] Case 2: The length of the second sequence does not correspond to the length of the reference signal.

[0209] In this case, the first sequence may be a sequence obtained by processing the second sequence. In this case, the reference signal is generated according to the first sequence, which may also be replaced by: the reference signal is generated according to the second sequence. For example, the transmitting end device determines the second sequence and then generates the reference signal based on the second sequence.

[0210] The following describes two possible scenarios.

[0211] In the first possible scenario, the length of the second sequence corresponds to a partial length of the reference signal. In this scenario, the reference signal is generated according to the first sequence, which may also be replaced by: the reference signal is generated according to the second sequence, or the reference signal is generated according to multiple second sequences. In addition, the first sequence corresponds to X1 OOK symbols, which may also be replaced by: the second sequence corresponds to X1 OOK symbols, or multiple second sequences correspond to X1 OOK symbols.

[0212] If the length of the reference signal is very long, and includes a large number of OOK symbols (for example, hundreds of OOK symbols or even thousands of OOK symbols), the length of the sequence used to generate the reference signal (i.e., the first sequence) is N*X1, so the length of the sequence used to generate the reference signal will also be very long. In this way, the complexity of generating the reference signal based on the longer sequence will be relatively large, and if the sequence used to generate the reference signal is pre-stored, the longer the sequence length, the higher the storage space requirement may be. Therefore, the transmitting end device can generate a second sequence that is shorter than the first sequence, or pre-store the second sequence, and then process the second sequence to obtain a first sequence that is relatively longer in length.

[0213] In a possible implementation manner, the first sequence is obtained by concatenating L second sequences, where L is not equal to X1 and L is an integer greater than 1.

[0214] See also Fig.14 , as an example, Fig.14 is a schematic diagram of a second sequence and a reference signal applicable to an embodiment of the present application. Fig.14 As shown, a second sequence corresponds to some OOK symbols of the reference signal. Specifically, the length of the second sequence is N*X1 / L, and the second sequence can be repeated L times to obtain a first sequence with a length of N*X1, that is, the first sequence with a length of N*X1 is obtained by splicing L second sequences.

[0215] It can be understood that based on the embodiment of the present application, for this scenario, the above Fig.14 Taking the example shown as an example, for the transmitting device, a second sequence with a length of N*X1 / L can be pre-stored, or a second sequence with a length of N*X1 / L can be generated. When a reference signal is to be generated using a first sequence with a length of N*X1, L second sequences can be used to generate a reference signal, thereby achieving the generation of a reference signal using a first sequence with a length of N*X1.

[0216] It can also be understood that the above implementation is an example and is not limited to this, and any variation of the above implementation is applicable to the embodiments of the present application. For example, the first sequence is obtained by splicing L second sequences, and at least two of the L second sequences are different, such as the lengths of the at least two second sequences are different, and the values ​​of the at least two second sequences are different.

[0217] In a second possible scenario, a partial length of the second sequence corresponds to the length of the reference signal. In this scenario, the reference signal is generated according to the first sequence, which may also be replaced by: the reference signal is generated according to the second sequence, or the reference signal is generated according to a subsequence of the second sequence. In addition, the first sequence corresponds to X1 OOK symbols, which may also be replaced by: the second sequence corresponds to X1 OOK symbols, or the subsequence of the second sequence corresponds to X1 OOK symbols.

[0218] Considering that for reference signals of different lengths, it may be necessary to generate and / or pre-store first sequences of various lengths, the storage space requirement is relatively high. Therefore, the transmitting end may generate and / or pre-store a second sequence of relatively longer length, and when the reference signal is to be sent, the second sequence of relatively longer length may be processed (e.g., truncated) according to the length of the reference signal to obtain a first sequence of relatively shorter length.

[0219] In a possible implementation, the first sequence is part or all of the second sequence. When the first sequence is part of the second sequence, the first sequence may be obtained by intercepting the second sequence. When the first sequence is the second sequence, it is similar to case 1 and will not be described in detail here. The following mainly introduces the case where the first sequence is part of the second sequence.

[0220] See also Fig.15 and Fig.16 , as an example, Fig.15 and Fig.16 is another schematic diagram of a second sequence and a reference signal applicable to an embodiment of the present application. Fig.15 or Fig.16 As shown, the partial length of the second sequence corresponds to the OOK symbol included in the reference signal. Fig.15 As shown, when the reference signal #1 includes 4 OOK symbols (such as the length of the reference signal #1 is the first length), there are 2 first symbols in the 4 OOK symbols. Therefore, the first sequence used to generate the reference signal #1 can be two subsequences in the second sequence. For another example, Fig.15 As shown, when the reference signal #2 includes X OOK symbols (such as the length of the reference signal #21 is the second length), the first sequence used to generate the reference signal #2 may be the second sequence.

[0221] In one example, the starting position of the first sequence is the starting position of the second sequence. Based on this, no matter how long the reference signal is, the sequence used to generate the reference signal (ie, the first sequence) is intercepted from the starting position of the second sequence.

[0222] like Fig.15As shown, the first sequence used to generate reference signal #1 and the first sequence used to generate reference signal #2 both have the starting position of the second sequence. Specifically, the first sequence used to generate reference signal #1 may be obtained by intercepting a sequence of the first length from the starting position of the second sequence. In other words, the first sequence used to generate reference signal #1 may be obtained by intercepting a sequence of the first length from the starting position of the second sequence. In other words, the first sequence used to generate reference signal #2 may be obtained by intercepting a sequence of the second length from the starting position of the second sequence. In other words, the first sequence used to generate reference signal #2 may be obtained by intercepting a sequence of the second length from the starting position of the second sequence.

[0223] In another example, the starting position of the first sequence is determined according to the time domain resources occupied by the reference signal. Based on this, the time domain resources occupied by the reference signal are different, and the first sequence used is also different. For example, the second sequence can correspond to a certain duration (such as the duration of a system frame (such as 10ms)), and each subsequence in the second sequence corresponds to a different position of the duration, such as each subsequence in the second sequence corresponds to a different position of a system frame (such as a different subframe position or a different time slot position or a different OFDM symbol position). In this way, after the transmission time of the reference signal is determined, the first sequence used to generate the reference signal can be determined.

[0224] like Fig.16 As shown, the sending time of reference signal #1 is the first position, and the sending time of reference signal #3 is the second position. The first position and the second position are different, and the starting positions of the first sequence used to generate reference signal #1 and the first sequence used to generate reference signal #3 are also different.

[0225] For example, when the reference signal is sent at the first position (such as the first slot or the first OFDM symbol), the starting position of the first sequence is the starting position of the second sequence. Fig.16 As shown, based on this, the first sequence used to generate the reference signal #1 can be obtained by truncating a sequence of the first length starting from the starting position of the second sequence. In other words, starting from the starting position of the second sequence, truncating a sequence of the first length can obtain the first sequence used to generate the reference signal #1.

[0226] For another example, when the reference signal is sent at the second position (such as the last slot or the last OFDM symbol), the starting position of the first sequence is the ending position of the second sequence. Fig.16As shown, based on this, the first sequence for generating reference signal #3 can be obtained by cutting a sequence of a third length starting from the end position of the second sequence. In other words, starting from the end position of the second sequence, cutting a sequence of the third length can obtain the first sequence for generating reference signal #3.

[0227] It can be understood that based on the embodiment of the present application, for this scenario, the above Fig.15 or Fig.16 Taking the example shown as an example, for the transmitting device, a second sequence with a longer length can be pre-stored, or a second sequence with a longer length can be generated. When the first sequence is to be used to generate a reference signal, the first sequence can be obtained by truncating from the second sequence as needed.

[0228] The above introduces the various schemes of the embodiments of the present application respectively. The following introduces possible specific processes applicable to the embodiments of the present application from the transmitting device and the receiving device side, combined with the above-mentioned situation 1 and situation 2.

[0229] 1. Taking the above situation 1 as an example, possible processes of the sending device and the receiving device are introduced.

[0230] 1. Transmitter device

[0231] by Fig.13 Taking the example shown as an example, as an example, the sending end device can perform the following operations.

[0232] 1) Determine the first sequence of length W = N*X1, such as: {x 0 ,x 1 ,…,x N*X1}.

[0233] In a possible implementation manner, a transmitting device generates a first sequence.

[0234] In another possible implementation manner, the transmitting device obtains (or reads) the first sequence.

[0235] 2) Divide the first sequence of length W (i.e., the time domain sequence, such as the complex sequence) into X1 segments of subsequences, each of which is of length N, respectively {x 0 ,…,x N-1},{x N ,…,x 2N-1},…,{x N*(X1-1) ),…,x N*X1}.

[0236] 3) Assuming that the reference signal occupies P OFDM symbols, the X1 segment subsequence is divided into P groups, and each group generates a time domain sequence according to the pattern corresponding to the OOK symbol in the OFDM symbol.

[0237] Specifically, the X1 segment subsequence is divided into P groups of subsequences according to the pattern corresponding to the OOK symbol of the reference signal, and each group of subsequences generates a time domain sequence according to the pattern corresponding to the OOK symbol in the corresponding OFDM symbol. Specifically, if the OOK symbol is the first symbol, it is the corresponding subsequence; if it is the second symbol, it is filled with 0, thereby obtaining a time domain sequence of P OFDM symbols. Fig.13 As shown, in the first group of OFDM symbols, according to the pattern corresponding to the OOK symbols, it can be known that the first group of OFDM symbols includes 2 first symbols, and therefore the first group of subsequences corresponding to the first group of OFDM symbols includes 2 subsequences; in the last group (Pth group) of OFDM symbols, according to the pattern corresponding to the OOK symbols, it can be known that the Pth group of OFDM symbols includes 3 first symbols, and therefore the Pth group of subsequences corresponding to the Pth group of OFDM symbols includes 3 subsequences.

[0238] Further optionally, a CP is generated according to the time domain sequence, and a CP is generated for each group of subsequences (ie, corresponding to each OFDM symbol).

[0239] 4) Generate a corresponding frequency domain sequence according to the time domain sequence of each OFDM symbol, and map the frequency domain sequence to the corresponding frequency domain position to obtain a frequency domain signal.

[0240] For example, a DFT operation may be performed on the time domain sequence to obtain a frequency domain sequence. For another example, the corresponding frequency domain sequence may be obtained by some algorithms (such as LS algorithm).

[0241] After obtaining the frequency domain sequence, the transmitting end device may map the frequency domain sequence to the frequency domain position of the reference signal (eg, LP-SS), such as the subcarrier corresponding to the reference signal.

[0242] 5) Perform IFFT (or inverse discrete Fourier transform (IDFT)) on the frequency domain signal to obtain the signal to be transmitted.

[0243] If there are other signals (such as data signals) in addition to the reference signal (such as LP-SS) in the same OFDM symbol, as an example, the frequency domain signal obtained in step 4) and other frequency domain signals can be uniformly subjected to IFFT (or IDFT), or can also be subjected to IFFT (or IDFT) separately, without limitation.

[0244] 2. Receiving equipment

[0245] Taking the reference signal used for time synchronization as an example, as an example, the receiving device can perform the following operations.

[0246] 1) Determine a first sequence, and obtain a local sequence based on the first sequence.

[0247] The receiving device determines the local sequence according to the first sequence, for example, by processing the first sequence (such as spread spectrum processing or oversampling processing) to obtain the local sequence. As an example, the length of the local sequence is related to the sampling rate used by the receiving device.

[0248] The way in which the receiving end device determines the first sequence may refer to the way in which the transmitting end device determines the first sequence, and is not limited thereto.

[0249] 2) Receive a signal, and obtain a signal to be processed from the received signal according to a pattern corresponding to the X OOK symbols.

[0250] Specifically, the receiving device can select the target sampling points from the received signal according to the pattern corresponding to the OOK symbol of the reference signal, and perform cascade processing to obtain a cascaded sequence.

[0251] See also Fig.17 , as an example, Fig.17 Schematic diagram of a receiving device processing a reference signal applicable to an embodiment of the present application. Fig.17 As shown, assuming that sampling point a is the starting point of the reference signal, the sampling point corresponding to the first symbol is selected as the target sampling point according to the pattern corresponding to the OOK symbol. Fig.17 As shown, the shaded part is all received signals. If sampling point a is the starting point of the leftmost solid window, the target sampling point is all sampling points included in the set of all solid windows. If sampling point a is the starting point of the leftmost dotted window, the target sampling point is all sampling points included in the set of all dotted windows. In the solid window set or the dotted window set, each window can correspond to the length of an OOK symbol, and the relative position of each window is determined according to the relative position of the first symbol in the reference signal.

[0252] Optionally, the target sampling point does not contain a CP of each OFDM symbol.

[0253] 3) Correlation processing is performed on the signal to be processed and the local sequence to obtain time synchronization.

[0254] Specifically, the receiving device correlates the cascaded sequence with the local sequence to obtain a correlation value. Then, the reference point is changed and sliding correlation is performed to obtain multiple correlation values. The correlation peak is searched among the multiple correlation values, or the correlation value greater than the threshold is searched among the multiple correlation values ​​to determine the starting position of the reference signal in the time domain, thereby obtaining time synchronization.

[0255] 2. Taking the above situation 2 as an example, possible processes of the sending device and the receiving device are introduced.

[0256] 1. Transmitter device

[0257] by Fig.14 Taking the example shown as an example, as an example, the sending end device can perform the following operations.

[0258] 1) Determine a second sequence with a length of N*X1 / L.

[0259] In a possible implementation manner, the transmitting device generates a second sequence.

[0260] In another possible implementation manner, the transmitting device obtains (or reads) the second sequence.

[0261] Specifically, reference may be made to the method in which the transmitting end device determines the first sequence, which will not be described in detail here.

[0262] 2) Divide the L second sequences (i.e., time domain sequences, such as complex number sequences) into X1 segments of subsequences, each of which has a length of N.

[0263] Assume that the reference signal bandwidth is N REs, and the number of ON symbols in the X OOK symbols of the reference signal is X1. Therefore, the transmitting device uses a sequence of length N*X1 to generate the reference signal. Since the length of a second sequence is N*X1 / L, the transmitting device can use L second sequences to generate the reference signal.

[0264] 3) Assuming that the reference signal occupies P OFDM symbols, the X1 segment subsequence is divided into P groups, and each group generates a time domain sequence according to the pattern corresponding to the OOK symbol in the OFDM symbol.

[0265] 4) Generate a corresponding frequency domain sequence according to the time domain sequence of each OFDM symbol, and map the frequency domain sequence to the corresponding frequency domain position to obtain a frequency domain signal.

[0266] 5) Perform IFFT on the frequency domain signal to obtain the signal to be transmitted.

[0267] For steps 3)-5), please refer to the previous related description and will not be repeated here.

[0268] 2. Receiving equipment

[0269] Taking the reference signal used for time synchronization as an example, as an example, the receiving device can perform the following operations.

[0270] 1) Determine a second sequence, and obtain a local sequence based on the second sequence.

[0271] Specifically, the receiving device may obtain a local sequence based on the L second sequences.

[0272] The receiving end device determines the local sequence according to the second sequence, which may include, for example: the receiving end device processes the second sequence (such as spread spectrum processing, oversampling processing, etc.) to obtain the local sequence.

[0273] The way in which the receiving end device determines the second sequence may refer to the way in which the transmitting end device determines the second sequence, and is not limited thereto.

[0274] 2) Receive a signal, and obtain a signal to be processed from the received signal according to a pattern corresponding to the X OOK symbols.

[0275] 3) Correlation processing is performed on the signal to be processed and the local sequence to obtain time synchronization.

[0276] For steps 2)-3), please refer to the previous related description and will not be repeated here.

[0277] It is understood that in the embodiments of the present application, it is mentioned many times that "a sequence is divided into multiple sub-sequences". It is understood that this is only for the sake of easy understanding, and does not limit the sequence to be divided to obtain multiple sub-sequences. Fig.12 For example, the first sequence is mapped to different OOK symbols, and different OOK symbols correspond to different subsequences in the first sequence. It can also be understood that the subsequences on different OOK symbols can be considered to be obtained by dividing (or splitting) the first sequence.

[0278] It can also be understood that in each embodiment of the present application, "receiving" can also be replaced by "detecting" or "reading" or "monitoring". For example, "receiving a reference signal" can also be replaced by "detecting a reference signal" or "reading a reference signal" or "monitoring a reference signal".

[0279] It can also be understood that in some of the above embodiments, the main circuit and the wake-up circuit are mainly used as examples for exemplary description, and the present application is not limited to this. For example, "wake-up circuit" can also be replaced by "first module", or can also be replaced by "wake-up link", or can also be replaced by "in the first state", or can also be replaced by "in the first mode". For example, "the terminal device uses the wake-up circuit to receive a signal" can also be replaced by "the terminal device receives a signal through the first module or the terminal device receives a signal on the wake-up link". "Main circuit" can also be replaced by "second module", or can also be replaced by "main link", or can also be replaced by "in the second state", or can also be replaced by "in the second mode". For example, "the terminal device uses the main circuit to receive a signal" can also be replaced by "the terminal device receives a signal through the second module or the terminal device receives a signal on the main link".

[0280] It can also be understood that in some of the above embodiments, "transmission" is mentioned. If no special explanation is given, transmission includes receiving and / or sending. For example, transmitting a signal may include receiving a signal and / or sending a signal.

[0281] It can also be understood that in each embodiment of the present application, for the convenience of description, the device that sends the reference signal is referred to as a transmitting end device, and the device that receives the reference signal is referred to as a receiving end device, and the naming and specific form of the transmitting end device and the receiving end device do not limit the protection scope of the embodiments of the present application. As an example, the transmitting end device can be a terminal device or a network device, and the receiving end device can be a terminal device or a network device.

[0282] It can also be understood that in some of the above embodiments, sending information is mentioned multiple times. Taking A sending information to B as an example, A sending information to B may include A sending information directly to B, or may include A sending information to B through other devices or network elements, and there is no limitation on this.

[0283] It can also be understood that in some of the above embodiments, pre-agreement and pre-definition are mentioned many times, and those skilled in the art should understand their meanings. Pre-definition means that the standard protocol is pre-defined. Pre-agreement means that the devices have agreed or negotiated in advance. For example, a sequence (such as a first sequence, and also such as a second sequence) is pre-agreement, which means that the form of the sequence and / or the method of generating the sequence are agreed in advance between the devices (such as between the receiving device and the sending device).

[0284] It can also be understood that some optional features in the embodiments of the present application may not depend on other features in some scenarios, or may be combined with other features in some scenarios, without limitation.

[0285] It can also be understood that the solutions in the various embodiments of the present application can be used in reasonable combination, and the explanations or descriptions of the various terms appearing in the embodiments can be mutually referenced or explained in the various embodiments, without limitation.

[0286] It can also be understood that in the above-mentioned method embodiments, the methods and operations implemented by the terminal device can also be implemented by components that can be formed by the terminal device (such as chips or circuits); in addition, the methods and operations implemented by the network device can also be implemented by components that can be formed by the network device (such as chips or circuits), without limitation.

[0287] Above, combined Figures 11 to 17 The method provided by the embodiment of the present application is described in detail. Figures 18 to 20The device provided in the embodiment of the present application is described in detail. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment, so the contents not described in detail can be referred to the method embodiment above, and for the sake of brevity, they are not described here.

[0288] See also Fig.18 , as an example, Fig.18 1 is a schematic diagram of a communication device 1800 provided in an embodiment of the present application. Transceiver unit 1810. The transceiver unit 1810 can be used to implement corresponding communication functions. The transceiver unit 1810 can also be called a communication interface or a communication unit. Optionally, the device 1800 also includes a processing unit 1820 that can be used to perform processing, such as generating a first sequence.

[0289] Optionally, the device 1800 may further include a storage unit, which may be used to store instructions and / or data, and the processing unit 1820 may read the instructions and / or data in the storage unit so that the device implements the aforementioned method embodiment.

[0290] In a first possible design, the device 1800 may be the transmitting end device in the aforementioned embodiment, and the device 1800 may implement the steps or processes performed by the transmitting end device in the above method embodiment. Among them, the transceiver unit 1810 may be used to perform the transceiver-related operations of the transmitting end device in the above method embodiment (such as the operations of sending and / or receiving data or messages), and the processing unit 1820 may be used to perform the processing-related operations of the transmitting end device in the above method embodiment, or operations other than transceiver (such as operations other than sending and / or receiving data or messages).

[0291] In a possible implementation, the transceiver unit 1810 is used to send a reference signal, where the reference signal is generated according to a first sequence, and the reference signal includes X on-off keying OOK symbols, where the X OOK symbols include X1 first symbols and X2 second symbols, where the first symbol indicates a first bit value, and the second symbol indicates a second bit value, and the first sequence corresponds to X1 first symbols, where X is an integer greater than 1, X1 and X2 are integers greater than or equal to 0, and X1+X2=X.

[0292] Optionally, the processing unit 1820 is configured to determine a reference signal.

[0293] Optionally, the processing unit 1820 is configured to determine a first sequence.

[0294] Optionally, the processing unit 1820 is configured to generate a reference signal according to the first sequence.

[0295] In a second possible design, the device 1800 may be a receiving end device in the aforementioned embodiment, and the device 1800 may implement the steps or processes performed by the receiving end device in the above method embodiment. Among them, the transceiver unit 1810 may be used to perform the transceiver-related operations of the receiving end device in the above method embodiment (such as the operations of sending and / or receiving data or messages), and the processing unit 1820 may be used to perform the processing-related operations of the receiving end device in the above method embodiment, or operations other than transceiver (such as operations other than sending and / or receiving data or messages).

[0296] In a possible implementation, the transceiver unit 1810 is used to receive a reference signal, where the reference signal is generated according to a first sequence, the reference signal includes X on-off keying OOK symbols, the X OOK symbols include X1 first symbols and X2 second symbols, the first symbol indicates a first bit value, the second symbol indicates a second bit value, the first sequence corresponds to X1 first symbols, X is an integer greater than 1, X1 and X2 are integers greater than or equal to 0, and X1+X2=X.

[0297] Optionally, the processing unit 1820 is configured to perform correlation processing on the reference signal according to the first sequence.

[0298] Optionally, the processing unit 1820 is used to perform correlation processing on the reference signal according to the first sequence, including: the processing unit 1820 is used to obtain a signal to be processed according to a pattern corresponding to X OOK symbols; and perform correlation processing on the signal to be processed according to the first sequence.

[0299] It should be understood that the specific process of each unit executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0300] It should also be understood that the device 1800 here is embodied in the form of a functional unit. The term "unit" here may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a proprietary processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a merged logic circuit and / or other suitable components that support the described functions. In an optional example, those skilled in the art can understand that the device 1800 can be specifically the communication device in the above-mentioned embodiment, and can be used to execute the various processes and / or steps corresponding to the communication device in the above-mentioned method embodiments. To avoid repetition, it will not be repeated here.

[0301] The device 1800 of each of the above schemes has the function of implementing the corresponding steps performed by the communication device (such as a transmitting end device, and such as a receiving end device) in the above method. The function can be implemented by hardware, or by hardware executing the corresponding software implementation. The hardware or software includes one or more modules corresponding to the above functions; for example, the transceiver unit can be replaced by a transceiver (for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as the processing unit, can be replaced by a processor to respectively perform the transceiver operations and related processing operations in each method embodiment.

[0302] In addition, the above-mentioned transceiver unit 1810 can also be a transceiver circuit (for example, can include a receiving circuit and a sending circuit), and the processing unit can be a processing circuit.

[0303] It should be pointed out that Fig.18 The device in the above-mentioned embodiments may be a communication device (such as a terminal device or a network device), or a chip or a chip system, such as a system on chip (SoC). The transceiver unit may be an input / output circuit or a communication interface; the processing unit may be a processor or a microprocessor or an integrated circuit integrated on the chip. This is not limited here.

[0304] See also Fig.19 , as an example, Fig.19 1 is a schematic diagram of another communication device 1900 provided in an embodiment of the present application. The device 1900 includes a processor 1910, the processor 1910 is coupled to a memory 1920, the memory 1920 is used to store computer programs or instructions and / or data, and the processor 1910 is used to execute the computer programs or instructions stored in the memory 1920, or read the data stored in the memory 1920, so as to execute the methods in the above method embodiments.

[0305] Optionally, there are one or more processors 1910 .

[0306] Optionally, the memory 1920 is one or more.

[0307] Optionally, the memory 1920 is integrated with the processor 1910 or provided separately.

[0308] Alternatively, if Fig.19 As shown, the device 1900 further includes a transceiver 1930, which is used to receive and / or send signals. For example, the processor 1910 is used to control the transceiver 1930 to receive and / or send signals.

[0309] As an example, the processor 1910 may have Fig.18The processing unit 1820 shown in FIG. 1 may have the function of a storage unit, the memory 1920 may have the function of a storage unit, and the transceiver 1930 may have Fig.18 The functions of the transceiver unit 1810 are shown in FIG.

[0310] As a solution, the device 1900 is used to implement the operations performed by the communication device (such as a transmitting end device or a receiving end device) in the above method embodiments.

[0311] For example, the processor 1910 is configured to execute computer programs or instructions stored in the memory 1920 to implement relevant operations of the communication device in the above various method embodiments.

[0312] It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0313] It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory and / or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM). For example, RAM can be used as an external cache. By way of example and not limitation, RAM includes the following forms: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0314] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) can be integrated into the processor.

[0315] It should also be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0316] See also Fig. 20 , as an example, Fig. 20 2 is a schematic diagram of a chip system 2000 provided in an embodiment of the present application. The chip system 2000 (or also referred to as a processing system) includes a logic circuit 2010 and an input / output interface 2020 .

[0317] Among them, the logic circuit 2010 can be a processing circuit in the chip system 2000. The logic circuit 2010 can be coupled to a storage unit and call instructions in the storage unit so that the chip system 2000 can implement the methods and functions of each embodiment of the present application. The input / output interface 2020 can be an input / output circuit in the chip system 2000, outputting information processed by the chip system 2000, or inputting data or signaling information to be processed into the chip system 2000 for processing.

[0318] As a solution, the chip system 2000 is used to implement the operations performed by the communication device (such as a transmitting device or a receiving device) in the above method embodiments.

[0319] For example, the logic circuit 2010 is used to implement the processing-related operations performed by the communication device (such as a sending device, or a receiving device) in the above method embodiments; the input / output interface 2020 is used to implement the sending and / or receiving-related operations performed by the communication device (such as a sending device, or a receiving device) in the above method embodiments.

[0320] An embodiment of the present application also provides a computer-readable storage medium on which are stored computer instructions for implementing the methods executed by a communication device (such as a sending end device or a receiving end device) in the above-mentioned method embodiments.

[0321] For example, when the computer program is executed by a computer, the computer can implement the method executed by a communication device (such as a transmitting device or a receiving device) in each embodiment of the above method.

[0322] An embodiment of the present application also provides a computer program product, comprising instructions, which, when executed by a computer, implement the methods performed by a communication device (such as a transmitting device or a receiving device) in the above-mentioned method embodiments.

[0323] The present application also provides a communication system, which includes the transmitting device and / or the receiving device in the above embodiments. Fig.11 The transmitting end device and the receiving end device in the embodiment.

[0324] The explanation of the relevant contents and beneficial effects of any of the above-mentioned devices can be referred to the corresponding method embodiments provided above, which will not be repeated here.

[0325] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0326] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. For example, the computer can be a personal computer, a server, or a network device, etc. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media integrations. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)). For example, the aforementioned available medium includes, but is not limited to, various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0327] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A communication method, characterized in that: include: A reference signal is sent, where the reference signal is generated according to a first sequence, where the reference signal includes X on-off keying OOK symbols, where the X OOK symbols include X1 first symbols and X2 second symbols, where the first symbol indicates a first bit value, where the second symbol indicates a second bit value, where the first sequence corresponds to the X1 first symbols, where X is an integer greater than 1, where X1 and X2 are integers greater than or equal to 0, and where X1+X2=X.

2. A communication method, characterized in that: include: A reference signal is received, where the reference signal is generated according to a first sequence, where the reference signal includes X on-off keying (OOK) symbols, where the X OOK symbols include X1 first symbols and X2 second symbols, where the first symbol indicates a first bit value, where the second symbol indicates a second bit value, where the first sequence corresponds to the X1 first symbols, where X is an integer greater than 1, where X1 and X2 are integers greater than or equal to 0, and where X1+X2=X.

3. The method according to claim 2, characterized in that The method further comprises: According to the first sequence, correlation processing is performed on the reference signal.

4. The method according to claim 3, characterized in that The performing correlation processing on the reference signal according to the first sequence includes: Obtaining a signal to be processed according to patterns corresponding to the X OOK symbols; According to the first sequence, correlation processing is performed on the signal to be processed.

5. The method according to any one of claims 1 to 4, characterized in that The first sequence includes X1 subsequences, and each subsequence in the X1 subsequences corresponds to one first symbol.

6. The method according to any one of claims 1 to 5, characterized in that The reference signal is generated according to the first sequence and a pattern corresponding to the X OOK symbols.

7. The method according to claim 6, characterized in that The pattern corresponding to the X OOK symbols represents: the position and / or order of the X1 first symbols and the X2 second symbols.

8. The method according to any one of claims 1 to 7, characterized in that The length of the first sequence is: N*X1, where N represents the number of frequency domain units occupied by the reference signal.

9. The method according to any one of claims 1 to 8, characterized in that The first sequence is obtained by concatenating L second sequences, where L is not equal to X1 and L is an integer greater than 1.

10. The method according to any one of claims 1 to 8, characterized in that The first sequence is part or all of the second sequence.

11. The method according to claim 10, characterized in that The starting position of the first sequence is the starting position of the second sequence; or, The starting position of the first sequence is determined according to the time domain resources occupied by the reference signal.

12. The method according to any one of claims 1 to 11, characterized in that The reference signal occupies P orthogonal frequency division multiplexing OFDM symbols, the first sequence includes P groups of subsequences, the P groups of subsequences correspond to the P OFDM symbols, and each group of subsequences corresponds to one OFDM symbol, the number of subsequences included in each group of subsequences in the P groups of subsequences is greater than or equal to 0, and P is an integer greater than 1 or equal to 1.

13. The method according to claim 12, characterized in that The P group of subsequences includes the i-th group of subsequences, the i-th group of subsequences corresponds to the i-th OFDM symbol among the P OFDM symbols, and the frequency domain signal of the reference signal in the i-th OFDM symbol is determined according to the positions of the first symbol and the second symbol included in the i-th OFDM symbol, wherein i is an integer greater than 1 or equal to 1 and less than P or equal to P.

14. The method according to any one of claims 1 to 13, characterized in that The reference signal is sent periodically.

15. The method according to any one of claims 1 to 14, characterized in that The reference signal is a low power synchronization signal LP-SS.

16. The method according to any one of claims 1 to 15, characterized in that The first sequence is any one of the following: a ZC sequence, a GOLD sequence, an m sequence, or a pseudo-random sequence.

17. The method according to claim 8, characterized in that The frequency domain unit is a resource element or a subcarrier.

18. The method according to any one of claims 1 to 17, characterized in that The signal power of the first symbol is not 0, and the signal power of the second symbol is 0; or The signal power of the first symbol is greater than or equal to a first threshold, the signal power of the second symbol is less than or equal to a second threshold, and the first threshold is greater than or equal to the second threshold.

19. A communication device, characterized in that: The method comprises a module or a unit for executing the method according to any one of claims 1 to 18.

20. A communication device, characterized in that: The device comprises a processor, wherein the processor is configured to execute a computer program or instruction stored in a memory, so that the device performs the method according to any one of claims 1 to 18.

21. The device according to claim 20, characterized in that The device further comprises the memory and / or the communication interface, wherein the communication interface is coupled to the processor. The communication interface is used to input and / or output information.

22. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program or instruction. When the computer program or instruction is executed on a communication device, the communication device is caused to perform the method according to any one of claims 1 to 18.

23. A computer program product, characterized in that The computer program product comprises a computer program or instructions for performing the method according to any one of claims 1 to 18.

Images