Wireless communication method, device, and storage medium

Abstract

The present application provides a wireless communication method, a device, and a storage medium. The wireless communication method is applied to a terminal device, and the terminal device comprises a first receiver. The method comprises: the terminal device receives a synchronization signal by means of the first receiver (S801).

Description

Method and device for wireless communication, storage medium TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of mobile communication technology, and in particular to a method and device for wireless communication, and a storage medium. BACKGROUND

[0002] In the related art, the process of cell search by a UE is implemented by searching for a synchronization signal in one frequency band. This process requires the UE to blindly search for the synchronization signal at some frequency locations to determine whether a cell is deployed.

[0003] SUMMARY

[0004] Embodiments of the present application provide a method and device for wireless communication, and a storage medium.

[0005] The method for wireless communication provided by an embodiment of the present application is applied to a terminal device, and the terminal device includes a first receiver. The method includes:

[0006] The terminal device receives a synchronization signal through the first receiver.

[0007] The method for wireless communication provided by an embodiment of the present application is applied to a network device, and the method includes:

[0008] The network device transmits a synchronization signal, and the synchronization signal is used for reception by a first receiver included in a terminal device.

[0009] The terminal device provided by an embodiment of the present application includes:

[0010] A first communication unit is configured to receive a synchronization signal through a first receiver.

[0011] The network device provided by an embodiment of the present application includes:

[0012] A second communication unit is configured to transmit a synchronization signal, and the synchronization signal is used for reception by a first receiver included in a terminal device.

[0013] The terminal device provided by an embodiment of the present application includes a first receiver, a processor, and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, so that the first receiver performs the wireless communication method described above.

[0014] The network device provided by an embodiment of the present application includes a transceiver, a processor, and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, so that the transceiver performs the wireless communication method described above.

[0015] The chip provided by the embodiment of the present application is used to realize the wireless communication method.

[0016] Specifically, the chip comprises a processor configured to call and run a computer program from a memory, so that a device installed with the chip performs the wireless communication method.

[0017] The computer readable storage medium provided by the embodiment of the present application is used to store a computer program, and the computer program causes a computer to perform the wireless communication method.

[0018] The computer program product provided by the embodiment of the present application comprises computer program instructions, and the computer program instructions cause a computer to perform the wireless communication method.

[0019] The computer program provided by the embodiment of the present application, when running on a computer, causes the computer to perform the wireless communication method.

[0020] Through the above technical solution, the synchronization signal received by the terminal device is received by the first receiver, so as to reduce the power consumption required for receiving the synchronization signal, realize low-power consumption detection of the synchronization signal, and improve the energy-saving effect of the terminal device. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0022] Fig. 1 is a schematic diagram of an application scenario of the embodiment of the present application;

[0023] Fig. 2 is a schematic diagram of the composition of SSB of the embodiment of the present application;

[0024] Fig. 3 is a schematic diagram of the composition structure of the terminal device provided by the embodiment of the present application;

[0025] Fig. 4 is a schematic diagram of an optional generation process of OOK-1 signal provided by the embodiment of the present application;

[0026] Fig. 5 is a schematic diagram of an optional generation process of OOK-4 signal provided by the embodiment of the present application;

[0027] Fig. 6 is a schematic diagram of an optional transmission process of WUS provided by the embodiment of the present application

[0028] Fig. 7 is a schematic diagram of an optional structure of the terminal device provided by the embodiment of the present application;

[0029] Fig. 8 is a schematic diagram of an optional flow of the wireless communication method provided by the embodiment of the present application;

[0030] FIG. 9 is an optional flow chart of a wireless communication method according to an embodiment of the present application;

[0031] FIG. 10 is an optional flow chart of a wireless communication method according to an embodiment of the present application;

[0032] FIG. 11 is an optional structure diagram of a terminal device according to an embodiment of the present application;

[0033] FIG. 12 is an optional signal waveform diagram of a PSS according to an embodiment of the present application;

[0034] FIG. 13 is an optional signal waveform diagram of a PSS according to an embodiment of the present application;

[0035] FIG. 14 is an optional signal waveform diagram of a PSS according to an embodiment of the present application;

[0036] FIG. 15 is an optional signal waveform diagram of a PSS according to an embodiment of the present application;

[0037] FIG. 16 is an optional signal waveform diagram of a covering OFDM sequence according to an embodiment of the present application;

[0038] FIG. 17 is an optional flow chart of a wireless communication method according to an embodiment of the present application;

[0039] FIG. 18 is an optional flow chart of a wireless communication method according to an embodiment of the present application;

[0040] FIG. 19 is an optional structure diagram of a terminal device according to an embodiment of the present application;

[0041] FIG. 20 is an optional structure diagram of a network device according to an embodiment of the present application;

[0042] FIG. 21 is an optional structure diagram of a communication device according to an embodiment of the present application;

[0043] FIG. 22 is an optional structure diagram of a chip according to an embodiment of the present application;

[0044] FIG. 23 is an optional block diagram of a communication system according to an embodiment of the present application. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0046] The communication system scenario includes a terrestrial network (TN) and an NTN. Among them, the NTN generally adopts a satellite communication mode to provide communication services to ground users. The NTN system currently includes an NR-NTN and an IoT-NTN system, and may further include other NTN systems in the future.

[0047] FIG. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present application. As shown in FIG. 1, the communication system 100 can include a terminal device 110 and a network device 120. The network device 120 can communicate with the terminal device 110 through an air interface. The terminal device 110 and the network device 120 support multi-service transmission.

[0048] It should be understood that the embodiments of the present application are only exemplarily described with respect to the communication system 100, but the embodiments of the present application are not limited thereto. That is, the technical solutions of the embodiments of the present application can be applied to various communication systems, such as a long term evolution (LTE) system, an LTE time division duplex (TDD), a universal mobile telecommunication system (UMTS), an internet of things (IoT) system, a narrow band internet of things (NB-IoT) system, an enhanced machine type communication (eMTC) system, a 5G communication system (also referred to as a new radio (NR) communication system), or a future communication system, etc.

[0049] In the communication system 100 shown in FIG. 1, the network device 120 can be an access network device that communicates with the terminal device 110. The access network device can provide communication coverage for a specific geographic area, and can communicate with the terminal device 110 (such as a UE) located in the coverage area.

[0050] The network device 120 can be an evolved Node B (eNB or eNodeB) in a Long Term Evolution (LTE) system, or a Next Generation Radio Access Network (NG RAN) device, or a base station (gNB) in a NR system, or a radio controller in a Cloud Radio Access Network (CRAN), or a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, or a network device in a future evolved Public Land Mobile Network (PLMN), etc.

[0051] The terminal device 110 can be any terminal device, including but not limited to a terminal device connected to the network device 120 or other terminal devices by wire or wireless connection.

[0052] For example, the terminal device 110 can refer to an access terminal, a User Equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user equipment. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, an IoT device, a satellite handset, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device, or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved network, etc.

[0053] The terminal device 110 can be used for Device to Device (D2D) communication.

[0054] The wireless communication system 100 can further include a core network device 130 in communication with the base station, which can be a 5G core network (5GC) device, e.g., an Access and Mobility Management Function (AMF), e.g., an Authentication Server Function (AUSF), e.g., a User Plane Function (UPF), e.g., a Session Management Function (SMF). Alternatively, the core network device 130 can also be an Evolved Packet Core (EPC) device of an LTE network, e.g., a Session Management Function + Core Packet Gateway (SMF + PGW-C) device. It should be understood that the SMF + PGW-C can implement the functions of both the SMF and the PGW-C. In the process of network evolution, the above-mentioned core network device can also be called by other names, or new network entities can be formed by dividing the functions of the core network, which is not limited by the embodiments of the present application.

[0055] The various functional units in the communication system 100 can also establish connections through a next generation (NG) interface to communicate with each other.

[0056] For example, the terminal device establishes an air interface connection with the access network device through the Uu interface, which is used to transmit user plane data and control plane signaling; the terminal device can establish a control plane signaling connection with the AMF through the NG interface 1 (N1 for short); the access network device, e.g., a next generation wireless access base station (gNB), can establish a user plane data connection with the UPF through the NG interface 3 (N3 for short); the access network device can establish a control plane signaling connection with the AMF through the NG interface 2 (N2 for short); the UPF can establish a control plane signaling connection with the SMF through the NG interface 4 (N4 for short); the UPF can interact with the data network to transmit user plane data through the NG interface 6 (N6 for short); the AMF can establish a control plane signaling connection with the SMF through the NG interface 11 (N11 for short); the SMF can establish a control plane signaling connection with the PCF through the NG interface 7 (N7 for short).

[0057] Fig. 1 exemplarily shows one base station, one core network device and two terminal devices. Optionally, the wireless communication system 100 can include multiple base station devices and each base station can include other number of terminal devices within its coverage. The embodiments of the present application do not limit the number of base stations and terminal devices.

[0058] It should be noted that Fig. 1 is only used to illustrate the system to which the embodiments of the present application are applied. Of course, the method shown in the embodiments of the present application can also be applied to other systems. In addition, the terms "system" and "network" are often used interchangeably in this paper. The term "and / or" in this paper is only used to describe the association relationship of the associated objects. It means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this paper generally represents an "or" relationship between the associated objects. It should also be understood that the "indication" mentioned in the embodiments of the present application can be direct indication or indirect indication, or can represent an associated relationship. For example, A indicates B, which can mean that B can be obtained through A; or it can mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; or it can mean that A and B have an associated relationship. It should also be understood that the "correspondence" mentioned in the embodiments of the present application can represent a direct correspondence or an indirect correspondence between the two, or it can represent an associated relationship between the two, or it can mean indication and being indicated, configuration and being configured, etc. It should also be understood that the "predefined" or "predefined rule" mentioned in the embodiments of the present application can be realized by pre-saving the corresponding code, table or other means that can be used to indicate related information in the device (for example, including terminal devices and network devices). The specific implementation manner is not limited in the present application. For example, the predefined can mean the definition in the protocol. It should also be understood that the "protocol" in the embodiments of the present application can mean the standard protocol in the communication field, for example, it can include the LTE protocol, the NR protocol and the related protocol applied to the future communication system. The present application does not limit this.

[0059] In order to facilitate the understanding of the technical solutions of the embodiments of the present application, the related technologies of the embodiments of the present application are described as follows. The following related technologies can be combined with the technical solutions of the embodiments of the present application in any way, and all of them belong to the protection scope of the embodiments of the present application.

[0060] Synchronization signal (SS) / physical broadcast channel (PBCH) block in NR

[0061] The common channels and signals in the NR system, such as synchronization signals and broadcast channels, need to be covered throughout the cell by means of multi-beam scanning to facilitate the reception of the UE in the cell. The multi-beam transmission of the SS is achieved by defining the SS / PBCH burst set. One SS burst set contains one or more SS / PBCH blocks, i.e., Synchronization Signal Blocks (SSBs). One SS / PBCH block is used to carry the synchronization signals and broadcast channels of one beam. Therefore, one SS burst set can contain the synchronization signals of the synchronization signal block number (SS block number) of beams in the cell. The maximum number of SS block number is related to the frequency band of the system:

[0062] For the frequency range less than 3 GHz, the maximum number of SS block number is 4;

[0063] For the frequency range of 3 GHz to 6 GHz, the maximum number of SS block number is 8;

[0064] For the frequency range of 6 GHz to 52.6 GHz, the maximum number of SS block number is 64.

[0065] One SSB contains one symbol of PSS, one symbol of SSS, and two symbols of NR-PBCH (New Radio Access Technology-Physical Broadcast Channel), as shown in FIG. 2. Among them, the time-frequency resources occupied by the PBCH contain the demodulation reference signal (DMRS) used for the demodulation of the PBCH.

[0066] All SS / PBCH blocks in the SS / PBCH burst set are transmitted within a 5 millisecond (ms) time window and are repeatedly transmitted at a certain period, which is configured by the high-level parameter SSB-timing, including 5 ms, 10 ms, 20 ms, 40 ms, 80 ms, 160 ms, etc. For the UE, the index of the SSB is obtained through the received SS / PBCH block, and the SSB index corresponds to the relative position of the SSB in the 5 ms time window. The UE realizes frame synchronization according to the index or the half-frame indication carried in the PBCH. Among them, the index of the SS / PBCH block is indicated by the DMRS of the PBCH or the information carried by the PBCH.

[0067] Synchronization raster

[0068] For wireless spectrum in NR, the frequency domain location of synchronization signal block is defined by synchronization raster, as shown in Table 1 below, the possible frequency domain location of synchronization signal block is determined by the formula in Table 1 in different frequency range, and is numbered by synchronization reference frequency (SSREF).

[0069] Table 1, SS raster in different frequency range

[0070] After the synchronization raster is determined, the resource mapping of synchronization signal block is determined according to Table 2 below, that is, the synchronization raster is located in the RE numbered 0 in the PRB numbered 10 in the 20 physical resource blocks (PRB) of the synchronization signal block.

[0071] Table 2, synchronization raster to SS block resource particle mapping

[0072] For synchronization raster, in different bands, the distribution of synchronization raster in the band is different. For example, for band n77, the number range of synchronization raster is 7711-8329, a total of 619 synchronization rasters. This number is called global synchronization channel number (GSCN).

[0073] Terminal energy saving based on wake-up receiver

[0074] For further power saving of UEs, 3GPP standards consider introducing a wake-up receiver (WUR) to receive a low power-Wake up signal (LP-WUS). The wake-up receiver has the characteristics of extremely low cost, extremely low complexity and extremely low power consumption, and it receives the wake-up signal through an envelope detection-based method. Therefore, the LP-WUS received by the wake-up receiver is different from the modulation method, waveform, etc. of the defined signal carried by the physical downlink control channel (PDCCH). The wake-up signal is an envelope signal modulated by the carrier signal (ASK). The demodulation of the envelope signal is based on the energy provided by the wireless radio frequency signal to drive the low-power circuit, so it can be passive. The wake-up receiver can also be powered by the terminal, regardless of the power supply method, the receiver greatly reduces the power consumption compared to the traditional receiver of the UE. The wake-up receiver can be combined with the UE as an additional module of the UE receiver, or it can be a separate UE wake-up function module.

[0075] The system block diagram of the zero-power wake-up-based receiver is shown in FIG. 3, which includes a main receiver 301 and a wake-up receiver, i.e. a low-power receiver (LPR) 302 in the UE 30. The wake-up receiver 302 receives the wake-up signal, and if the UE 30 needs to turn on the main receiver 303, it sends the wake-up information to the main receiver 301, indicating the UE to turn on the main receiver 301. Otherwise, the main receiver 301 of the UE can be in an off state.

[0076] The wake-up signal generation method based on the wake-up receiver

[0077] In order to realize the power saving of the wake-up receiver, the wake-up receiver needs lower complexity, so the waveform of the wake-up signal adopts ASK, frequency shift keying (FSK) and other waveforms that only need a low-complexity receiver to detect. Among them, the ASK waveform usually uses on-off keying (OOK) signal. At the same time, in the orthogonal frequency division multiplexing (OFDM) system, in order to utilize the OFDM transmitter to generate the wake-up signal and reduce the additional hardware overhead, the generation of the OOK signal is through multi-carrier (MC), so it is called MC-OOK signal. The generation of the MC-OOK signal can adopt multi-carrier modulation such as OFDM modulation, can maintain good compatibility with the OFDM system, and reduce the complexity of the transmitter introduced by the implementation of the WUR signal.

[0078] The generation of the MC-OOK signal is based on the difference of the bits carried by the OFDM signal:

[0079] OOK-1: Each OFDM symbol carries 1 bit, wherein the LP-WUS generation process is as shown in FIG. 4, the subcarriers carrying the LP-WUS are modulated and then subjected to inverse discrete Fourier transform (IDFT), and the corresponding output signal after the IDFT transform is OOK=1, the subcarriers carrying the LP-WUS are zero power, and the corresponding output signal is OOK=0.

[0080] OOK-M: Each OFDM symbol carries M bits in the time domain, the N subcarriers carrying the LP-WUS are generated by DFT, S samples represent M bits, and the S samples are subjected to discrete Fourier transform (DFT) to form S subcarriers. The S subcarriers are subjected to truncation and other processing to form N subcarriers, and then subjected to IDFT transform to generate the OOK signal. Wherein, M is greater than 1.

[0081] Taking M=4 as an example, the LP-WUS generation process is as shown in FIG. 5, S samples are generated by signal generation 501, wherein the S samples represent 4 bits on one OFDM symbol, the S samples are subjected to DFT 502 to obtain S subcarriers, the S subcarriers are subjected to truncation 503 and other processing to form N subcarriers, and the N subcarriers are subjected to IDFT 504 to obtain an OOK signal carrying 4 bits in the time domain on one OFDM symbol.

[0082] In the wake-up receiver discussed in the 3GPP standard, in addition to the wake-up receiver type supporting OOK waveform WUS reception, there can also be a wake-up receiver type supporting OFDM waveform WUS reception, where this wake-up receiver supporting OFDM waveform WUS reception is more power saving than the main receiver in the terminal device, and the wake-up receiver obtains the WUS by detecting the OFDM sequence. Since the OOK waveform is a switch (On-Off) signal in the time domain generated by the OFDM transmitter through multiple carriers, the on signal in the time domain can be generated by the OFDM transmitter carrying the OFDM sequence on a group of subcarriers, and the Off signal in the time domain is generated by zeroing on the group of subcarriers. Therefore, the WUS signals of the two waveforms can be combined, and the OFDM sequence can be superimposed on the on signal, i.e., the signal with a value of on, to form the waveform of the LP-WUS. Different OFDM sequences superimposed on the on signal can be used to carry information, for example, a group of Ns known sequences can be configured, and one of the Ns sequences can be transmitted to carry log2(Ns) bits of information.

[0083] There is a trade-off between power saving gain and coverage / resource overhead for OOK-based LP-WUS and OFDM-based LP-WUS. Therefore, if the UE (user equipment) can obtain information by receiving a coordinated LP-WUS that can be detected by any type of low-power wake-up receiver (LP-WUR), the UE can implement the LP-WUR according to the performance of each LP-WUR type. For UEs that want to achieve better coverage at the cost of increased power consumption, information carried by superimposed OFDM sequences should be provided. For example, an LP-WUR with I / Q branches detects whether the on signal, i.e., the on symbol, is transmitted by correlating the received signal and the provided OFDM sequence. Otherwise, an LP-WUR with an envelope detector detects whether the on symbol is transmitted by the envelope of the received signal.

[0084] As shown in FIG. 6, the signal 601 transmitted by the network device carries information 1010, where the OOK waveform is ON-Off-On-Off, and the covering OFDM sequence is superimposed on the on signal corresponding to 1. The received signal at the receiving end is shown in 602, and at the receiving end, the LP-WUR with an envelope detector detects the result by the envelope of the received signal to obtain the information 1010, as shown in 604, the LP-WUR with an in-phase (I) / quadrature-phase (Q) branch, i.e., based on OFDM, obtains the information 1010 by the correlation monitoring result of the received signal and the candidate covering OFDM sequence.

[0085] The process of cell search of the UE is implemented by searching a synchronization signal in a frequency band. The process needs the UE to blindly search the synchronization signal in some frequency positions to determine whether a cell is deployed. In the related art, under the design of a synchronization signal block, the UE detects a PSS signal through an OFDM receiver, monitors an SSS signal according to the detection result of the PSS signal, and then demodulates a PBCH. The process causes power consumption of the UE.

[0086] To make the technical solutions of the embodiments of the present application clear, the technical solutions of the present application are described in detail below through specific embodiments. The related art above can be combined with the technical solutions of the embodiments of the present application as optional solutions, which all belong to the protection scope of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0087] The embodiments of the present application provide a wireless communication method, applied to a terminal device 700 shown in FIG. 7, as shown in FIG. 7, the terminal device 700 includes a first receiver 701.

[0088] The wireless communication method applied to the terminal device 700 shown in FIG. 7 provided by the embodiments of the present application, as shown in FIG. 8, includes the following steps.

[0089] S801, the terminal device receives a synchronization signal through the first receiver.

[0090] The embodiments of the present application provide a wireless communication method, applied to a network device, as shown in FIG. 9, including the following steps.

[0091] S901, the network device sends a synchronization signal, which is used for the terminal device to receive through the first receiver.

[0092] The embodiments of the present application provide a wireless communication method, applied to a wireless communication system including a network device and the terminal device 700 shown in FIG. 7, as shown in FIG. 10, including the following steps.

[0093] S1001, the network device sends a synchronization signal to the terminal device; the synchronization signal is used for the terminal device to receive through the first receiver.

[0094] Next, the wireless communication method shown in FIG. 8, FIG. 9 or FIG. 10 is further described.

[0095] The network device generates a synchronization signal and sends the synchronization signal to the terminal device. The terminal device receives the synchronization signal through the first receiver. The synchronization signal can be used for one of the following processes: an initial access process, a radio resource management (RRM) measurement process, a radio link management (RLM) measurement process, a beam management process, etc.

[0096] In the embodiments of the present application, the first receiver is distinguished from the second receiver in at least one or more of the following aspects:

[0097] The complexity of the first receiver is lower than that of the second receiver.

[0098] The power consumption of the first receiver is lower than that of the second receiver.

[0099] The first receiver is suitable for simple / short signals, and the second receiver is suitable for more signals or more complex / long signals.

[0100] In the embodiments of the present application, the terminal device receives the synchronization signal through the first receiver, which can receive the synchronization signal of a simple signal based on low complexity and low power consumption, thereby reducing the power consumption required for the terminal device to receive the synchronization signal, realizing low-power-consumption detection of the synchronization signal, and improving the energy-saving effect of the terminal device.

[0101] In some embodiments, the first receiver is a low-power receiver (LPR).

[0102] In some embodiments, the first receiver supports one or more demodulation modes.

[0103] In the embodiments of the present application, the waveform of the synchronization signal received by the terminal device is suitable for the waveform that can be demodulated by the demodulation mode supported by the first receiver.

[0104] In some embodiments, the one or more demodulation modes include a first demodulation mode, and the first demodulation mode includes one or more of the following: on-off keying (OOK), FSK, phase shift keying (PSK), and quadrature amplitude modulation (QAM).

[0105] In some embodiments, the one or more demodulation modes further include a second demodulation mode, and the second demodulation mode includes:

[0106] Orthogonal frequency division multiplexing (OFDM).

[0107] In the embodiments of the present application, the first demodulation mode is distinguished from the second demodulation mode in at least one or more of the following aspects:

[0108] The complexity of the first demodulation mode is lower than that of the second demodulation mode.

[0109] The power consumption required by the first demodulation mode is lower than that required by the second demodulation mode.

[0110] The first demodulation mode has a lower requirement on hardware than the second demodulation mode.

[0111] In some embodiments, the terminal device 700 further includes a second receiver 702, as shown in FIG. 11, based on FIG. 7.

[0112] In some embodiments, the second receiver is a main receiver (MR).

[0113] In some embodiments, the second receiver supports a third demodulation mode, and the third demodulation mode includes OFDM.

[0114] It can be understood that the second demodulation mode has at least one or more of the following aspects distinguished from the third demodulation mode:

[0115] The second demodulation mode has a lower complexity than the third demodulation mode.

[0116] The second demodulation mode has a lower power consumption than the third demodulation mode.

[0117] The second demodulation mode has a lower requirement on hardware than the third demodulation mode.

[0118] In the embodiments of the present application, when the second receiver demodulates signals by OFDM, FFT needs to be used. The OFDM supported by the first receiver does not need to use FFT relative to the OFDM supported by the second receiver, so that the first receiver needs a lower power for demodulation based on OFDM relative to the second receiver for demodulation based on OFDM.

[0119] In some embodiments, the synchronization signal includes a primary synchronization signal (PSS), and the terminal device receives the synchronization signal by the first receiver includes that the terminal device receives the PSS by the first receiver.

[0120] In some embodiments, the synchronization signal includes a primary synchronization signal (PSS), and the network device transmits the synchronization signal includes:

[0121] The network device transmits the PSS, and the PSS is used for the terminal device to receive by the first receiver.

[0122] Here, the synchronization signal includes the PSS, the network device transmits the PSS to the terminal device, and the terminal device receives the PSS based on the first receiver.

[0123] Next, the transmission of the PSS in the case that the synchronization signal includes the PSS is described.

[0124] In some embodiments, the terminal device receiving the PSS via the first receiver comprises: the terminal device receiving the PSS via the first receiver, and the terminal device demodulating the PSS via the first receiver.

[0125] In some embodiments, the network device transmitting the PSS comprises: the network device modulating the PSS, and transmitting the PSS.

[0126] It can be understood that the PSS transmitted by the network device to the terminal device is a modulated signal, and the terminal device demodulates the received PSS after receiving the PSS.

[0127] In some embodiments, the terminal device demodulating the PSS via the first receiver comprises:

[0128] The terminal device demodulates the PSS via the first receiver by using a first demodulation manner or a second demodulation manner.

[0129] In the embodiments of the present application, the modulation manner of the network device modulating the PSS comprises one of the following: OOK, FSK, PSK, QAM, and OFDM. The modulation manner of the network device modulating the PSS can correspond to or can not correspond to the demodulation manner used by the terminal device to demodulate the PSS.

[0130] In an example, the network device modulates the PSS based on FSK, and the terminal device demodulates the received PSS based on FSK after receiving the PSS.

[0131] In an example, the network device modulates the PSS based on OFDM, and the terminal device demodulates the received PSS based on OOK after receiving the PSS.

[0132] In some embodiments, the signal waveform of the PSS is an on-off signal, and the on-off signal has a value of on or off in each symbol.

[0133] In the embodiments of the present application, the on-off signal can be understood as a signal or sequence composed of symbols with a value of on and symbols with a value of off. One symbol can be understood as one bit corresponding to one sequence in the on-off signal.

[0134] In the case where the signal waveform of the PSS is an on-off signal, the PSS can be understood as a PSS sequence. Alternatively, the PSS can be a sequence of 127 bits.

[0135] In an example, the waveform of the switch signal is shown as 1201 in FIG. 12. In an embodiment of the present application, the waveform of the PSS signal can be shown as 1201 in FIG. 12. For one symbol, the value is on or off.

[0136] In an embodiment of the present application, when the waveform of the PSS signal is a switch signal, the waveform of the PSS signal is simple, which is suitable for the first receiver to receive, thereby reducing the complexity and power consumption required for PSS detection, and achieving the purpose of power saving.

[0137] In some embodiments, the PSS is a switch signal generated based on a target first sequence.

[0138] In some embodiments, the network device modulates based on the target first sequence to obtain the PSS.

[0139] It can be understood that the network device modulates based on the target first sequence to obtain the PSS, which is a switch signal generated based on the target first sequence.

[0140] Optionally, the target first sequence belongs to a binary sequence.

[0141] In an embodiment of the present application, the sequence type of the target first sequence can include one of the following: Maximum Length Sequence (M sequence) and Gold sequence.

[0142] The length of the PSS is determined based on the length of the target first sequence. If the length of the target first sequence is n bits, the length of the PSS is 2 n -1 bits, and at most 2 n -1 sequences can be generated.

[0143] In some embodiments, the target first sequence is a sequence specified by a setting or a protocol.

[0144] In some embodiments, the target first sequence is one of a first number of first sequences, and the first number is a positive integer greater than or equal to 1.

[0145] One first sequence can generate one candidate on-off signal. In the case that the target first sequence is one of a first number of first sequences, the on-off signal of the PSS includes a first number of possibilities, i.e., a first number of candidate on-off signals, and the received signal waveform of the PSS is one of the first number of candidate on-off signals.

[0146] In an example, the first number is 3, and the waveform of the PSS signal is one of three candidate on-off signals.

[0147] In the embodiments of the present application, there can be a basic first sequence, and a first number of first sequences (including the basic first sequence) can be generated by shifting the basic first sequence.

[0148] In an example, the first sequence is an M sequence, and for a basic M sequence, more M sequences can be generated by cyclic shift. The cyclic shift of an M sequence refers to moving each bit in the sequence to the left or right according to a certain rule, that is, moving the highest bit or the lowest bit to the other side. The cyclic left shift operation is to move the high bits of the sequence to the low bits in order. The cyclic right shift operation is to move the low bits of the sequence to the high bits in order. By cyclic shift of a basic M sequence, a plurality of different M sequences can be generated. The length of an n-stage M sequence is 2 n -1, and if one bit is cyclically shifted each time, a maximum of S = 2 n -1 cyclic shift sequences (including the basic M sequence) can be generated, that is, the third sequence; if k bits are cyclically shifted each time (the offset k of the cyclic shift), a maximum of ) cyclic shift sequences (including the basic M sequence) can be generated.

[0149] In an example, the first sequence is a Gold sequence, and the Gold sequence is constituted by the modulo 2 addition of an m sequence pair, and each change of the cyclic shift of an m sequence in the m sequence pair can obtain a new Gold sequence. If the cyclic shifts of two m sequences in the m sequence pair are changed at the same time, and then the modulo 2 addition is performed, a maximum of (2 n -1)*(2 n -1) Gold sequences can be formed. Taking an m sequence of order 4 as an example, the sequence length is 15. For an m sequence pair, 225 Gold sequences can be generated. The Gold sequences generated by an m sequence pair can be defined as a Gold sequence group. A plurality of m sequence pairs correspond to a plurality of Gold sequence groups.

[0150] In some embodiments, the modulation mode of the PSS includes OOK or OFDM.

[0151] In a PSS scenario one, the modulation mode of the PSS is OOK.

[0152] In some embodiments, the PSS is a switch signal obtained by OOK modulation of the target first sequence.

[0153] In some embodiments, the network device modulates the target first sequence to obtain the PSS, including:

[0154] The network device OOK modulates the target first sequence to obtain the PSS.

[0155] The network device performs OOK modulation on the target first sequence to obtain a PSS, which is an on-off signal of the target first sequence after OOK modulation.

[0156] Here, the modulation method used by the network device for PSS modulation is OOK, and the PSS generated based on OOK modulation can be referred to as an OOK sequence.

[0157] In the case where the target first sequence is one of the first quantity of first sequences, one first sequence after OOK modulation can generate a candidate OOK sequence, and the OOK sequence includes the first quantity of possibilities, i.e., the first quantity of candidate OOK sequences, and the PSS is one of the first quantity of candidate OOK sequences.

[0158] The network device can directly perform OOK modulation on the target first sequence to obtain the PSS, or can perform encoding on the target first sequence and then perform OOK modulation to obtain the PSS.

[0159] The encoding method used for encoding the target first sequence can include linear encoding such as Manchester encoding. In Manchester encoding, a bit is represented by a level change to indicate the value of the bit. This encoding method ensures that there is at least one level change in each signal unit, thereby providing an opportunity for clock synchronization. For example, the bit value is 0, and the signal changes from high level to low level. The bit value is 1, and the signal changes from low level to high level. Since each bit contains a level jump, the first receiver can use this feature to synchronize data, and the first receiver can recover the clock at the time of transmission from the received signal, so that a separate clock signal channel is not needed.

[0160] In an example, as shown in FIG. 13, the target first sequence is the M sequence 1101001 shown in 1301, and the signal waveform of the PSS obtained after OOK modulation on the target first sequence can be as shown in 1302.

[0161] In an example, as shown in FIG. 14, the target first sequence is the M sequence 1101001 shown in 1301, and the signal waveform of the PSS obtained after OOK modulation on the target first sequence after Manchester encoding can be as shown in 1303.

[0162] In some embodiments, the terminal device demodulates the PSS by the first receiver using the first demodulation or the second demodulation method, including: the terminal device demodulates the PSS by the first receiver using OOK to obtain the target first sequence.

[0163] It can be understood that the PSS is used for the terminal device to demodulate by the first receiver using OOK to obtain the target first sequence.

[0164] Here, the network device modulates the PSS in OOK, and the terminal device demodulates the PSS in OOK, that is, the modulation mode of the PSS corresponds to the demodulation mode of the PSS.

[0165] In the embodiments of the present application, the target first sequence can be used to determine the first information of the PSS.

[0166] In some embodiments, the first information is used to determine the cell identifier.

[0167] The first receiver can detect the received PSS through a time domain correlation operation, thereby reducing the complexity and power consumption of searching for the PSS.

[0168] PSS scenario two, the modulation mode of the PSS is OFDM

[0169] In some embodiments, the network device modulates based on the target first sequence to obtain the PSS, including:

[0170] The network device performs OFDM modulation on the target second sequence, and carries the signal after OFDM modulation of the target second sequence on the on symbol of the PSS.

[0171] It can be understood that the on symbol of the PSS is used to carry the signal after OFDM modulation of the target second sequence.

[0172] The network device performs OFDM modulation on the target second sequence to obtain the signal after OFDM modulation, that is, the overlaid OFDM sequence, and carries the overlaid OFDM sequence on the on symbol of the PSS.

[0173] Here, the on symbol of the PSS carries the overlaid OFDM sequence, that is, the on symbol of the PSS appears as the waveform of the OFDM sequence. It can be understood that in the case where the modulation mode of the PSS is OOK, the on symbol of the PSS does not carry the overlaid OFDM sequence.

[0174] In an example, the signal waveform of the PSS can be as shown in FIG. 15, the on symbol of the switching signal carries the overlaid OFDM sequence, and the overlaid OFDM sequence generated based on the target second sequence is shown as 1501.

[0175] In the embodiments of the present application, the type of the target second sequence can include one of the following: M sequence, Gold sequence, ZC sequence (ZC sequence), Chirp sequence, Fourier transform or fast Fourier transform sequence (FT / FFT sequence), Golay sequence, Kasami sequence, low density sequence (Low density sequence), etc.

[0176] The length of the OFDM sequence covered on the on symbol of the PSS is determined based on the length of the target second sequence. Wherein, the length of the target second sequence is m bits, and the length of the covered OFDM is 2 m -1 bit, and at most 2 m -1 sequences can be generated.

[0177] In some embodiments, the target second sequence is a set sequence or a sequence specified by a protocol, i.e., a fixed sequence.

[0178] In some embodiments, the target second sequence is one of a second number of second sequences, and the second number is a positive integer greater than or equal to 1.

[0179] It can be understood that one second sequence can generate a candidate covered OFDM sequence, and in the case that the target second sequence is one of a second number of second sequences, the covered OFDM sequence includes a second number of possibilities, i.e., a second number of candidate covered OFDM sequences, and the covered OFDM sequence on the on symbol of the PSS is one of the second number of candidate covered OFDM sequences, then the signal waveform of the received on symbol of the PSS is one of the second number of candidate covered OFDM sequences.

[0180] In the embodiments of the present application, the target second sequence can be used to determine the first information of the PSS.

[0181] In some embodiments, the on symbol and the off symbol of the PSS are associated with the target first sequence.

[0182] The on symbol and the off symbol of the PSS can be associated with the target first sequence, or can be associated with the sequence after encoding of the target first sequence.

[0183] In an example, the target first sequence is a binary sequence, the on symbol of the PSS corresponds to 1 in the target first sequence, and the off symbol of the PSS corresponds to 0 in the target first sequence.

[0184] In an example, the target first sequence is a binary sequence, and the on symbol of the PSS corresponds to 1 in the sequence after encoding of the target first sequence, and the off symbol of the PSS corresponds to 0 in the sequence after encoding of the target first sequence.

[0185] In an example, the signal waveform of the PSS can be as shown in FIG. 15, and the on symbol of the switching signal carries the cover OFDM sequence, wherein the on symbol corresponds to 1 in the sequence after Manchester encoding of the M sequence 1101001, and the off symbol corresponds to 0 in the sequence after Manchester encoding of the M sequence 1101001.

[0186] In the embodiments of the present application, in the case that the on symbol of the PSS carries the cover OFDM sequence, the target first sequence can be used to control the network device to generate the cover OFDM sequence in the part corresponding to the on symbol of the PSS.

[0187] In the PSS scenario two, for the PSS whose on symbol carries the cover OFDM sequence, the demodulation mode adopted by the first receiver includes OOK or OFDM.

[0188] Taking the case that the demodulation mode adopted by the first receiver for the PSS whose on symbol carries the OFDM sequence is OOK as an example, the terminal device demodulates the PSS by the first receiver in the first demodulation or second demodulation mode, including:

[0189] The terminal device demodulates the PSS by the first receiver in the OOK mode to obtain the target first sequence.

[0190] It can be understood that the PSS is used for the terminal device to obtain the target first sequence by demodulating the PSS in the OOK mode by the first receiver.

[0191] Here, the terminal device detects the PSS by the first receiver based on the OOK mode to obtain the target first sequence.

[0192] The first receiver can detect the PSS to obtain the target first sequence by time domain detection such as envelope detection or autocorrelation detection.

[0193] In the embodiments of the present application, the first receiver demodulates the PSS in the OOK mode to obtain the target first sequence, and the target first sequence is used to carry the first information of the PSS.

[0194] Taking the case that the demodulation mode adopted by the first receiver for the PSS whose on symbol carries the OFDM sequence is OFDM as an example, the terminal device demodulates the PSS by the first receiver in the first demodulation or second demodulation mode, including:

[0195] The terminal device demodulates the PSS by the first receiver to obtain the target second sequence and / or the target first sequence.

[0196] It can be understood that the PSS is used for the terminal device to demodulate the PSS by the first receiver to obtain the target second sequence and / or the target first sequence.

[0197] Here, the terminal device detects the PSS by the first receiver based on OFDM to obtain the target first sequence and / or the target second sequence.

[0198] In the embodiment of the application, the first receiver based on OFDM detects the PSS by the covering OFDM sequence, and determines the position of the on symbol according to the detection result, thereby obtaining the target first sequence.

[0199] In the embodiment of the application, the first receiver based on OFDM detects the PSS by correlation detection to obtain the target second sequence. In the case that the first receiver detects the PSS by correlation detection to obtain the target second sequence, the first receiver can only detect the on symbol in the PSS by correlation detection, and does not detect the off symbol in the PSS.

[0200] In the embodiment of the application, the first receiver demodulates the PSS by OFDM to obtain the target second sequence and / or the target first sequence, and the target second sequence and / or the target first sequence is used to carry the first information of the PSS.

[0201] In some embodiments, the target second sequences corresponding to at least two on symbols in the PSS are the same; or, the target second sequences corresponding to at least two on symbols in the PSS are different.

[0202] The target second sequence corresponding to the on symbol of the PSS can be understood as that the on symbol of the PSS carries the signal after OFDM modulation of the target second sequence, that is, the covering OFDM sequence generated by the on symbol of the PSS carrying the target second sequence.

[0203] The target second sequences corresponding to at least two on symbols of the PSS are the same, which can be understood as that the target second sequences corresponding to different on symbols in the at least two on symbols of the PSS are the same, or the target second sequence corresponding to each on symbol of the PSS is the same. The target second sequence corresponding to the on symbol is a set sequence or one of the second sequences of the second quantity.

[0204] In the case that the target second sequences corresponding to different on symbols of the PSS are the same, the covering OFDM sequences carried on the different on symbols of the PSS are the same.

[0205] In the case that the target second sequences corresponding to each on symbol of the PSS are the same, the cover OFDM sequences carried on each on symbol of the PSS are the same, and at this time, the first receiver can demodulate the PSS by OOK or OFDM to obtain the target first sequence.

[0206] In the embodiments of the present application, if the target second sequences corresponding to each on symbol of the PSS are the same, the terminal device detects the cover OFDM sequences on different on symbols of the PSS, and can obtain the gain of time diversity and improve the detection performance.

[0207] The target second sequences corresponding to at least two on symbols of the PSS are different, which can be understood as that the target second sequences corresponding to different on symbols among the at least two on symbols are different. At this time, the cover OFDM sequences carried on different on symbols of the PSS are different. The combination of the target second sequences corresponding to the at least two on symbols included in the PSS is the target second sequence obtained by demodulating the PSS.

[0208] In some embodiments, the target second sequences corresponding to at least two on symbols of the PSS are different, including:

[0209] The at least two on symbols correspond to different parts of one target second sequence; or

[0210] The at least two on symbols correspond to different target second sequences respectively.

[0211] The target second sequence corresponding to one on symbol of the PSS can be a complete target second sequence or a part of a complete target second sequence, i.e., a partial target second sequence. The time unit of a single target second sequence is different, and a longer cover OFDM sequence can be transmitted through on symbols by corresponding a part of a complete target second sequence to one on symbol.

[0212] It can be understood that one target second sequence corresponds to L1 on symbols, where L1 is an integer greater than or equal to 1.

[0213] In the case that L1 is greater than 1, a plurality of on symbols of the PSS correspond to a complete target second sequence, and different on symbols among the plurality of on symbols correspond to different parts of one target second sequence.

[0214] In an example, as shown in FIG. 16, 1601, 1602, 1603 are PSSs in the case of L1 being 4, 2, 1 respectively, in 1601, one on symbol corresponds to one fourth of the target second sequence 1610, that is, one on symbol carries one fourth of the cover OFDM sequence; in 1602, one on symbol corresponds to one half of the target second sequence 1620, that is, one on symbol carries one half of the cover OFDM sequence; in 1603, one on symbol corresponds to the target second sequence 1630, that is, one on symbol carries a complete cover OFDM sequence.

[0215] In the case of L1 being equal to 1, each on symbol in the PSS corresponds to a complete target second sequence. Among them, different on symbols can correspond to different target second sequences.

[0216] In the case of different on symbols corresponding to different target second sequences, the combination of the target second sequences covered on the multiple on symbols is used to determine the first information of the PSS.

[0217] In an example, there are M candidate combinations of the target second sequences on the on symbols on the PSS, where M is determined based on the number of possible second sequences of the target second sequences on each on symbol in the PSS, there are m on signals on the PSS signal, and the target second sequence corresponding to the i th on symbol is one of M second sequences, then M is i

[0218] In an example, there are 2 on signals in the PSS, the OFDM sequence covered by the first on signal includes M1 candidate sequences, and the OFDM sequence covered by the second on signal includes M2 candidate sequences, then there can be M1*M2 possible combination sequences of the OFDM sequences covered on the 2 on signals.

[0219] In some embodiments, the target first sequence and / or the target second sequence is used to carry the first information of the PSS.

[0220] In the case of the target first sequence being used to carry the first information of the PSS, the terminal device can demodulate the PSS to obtain the target first sequence.

[0221] In the embodiments of the present application, the target first sequence of the PSS can be obtained in the following cases:

[0222] The PSS is an on-off signal after the target first sequence is modulated by OOK, and the first receiver demodulates the PSS by OOK;

[0223] ​The on symbol of the PSS is used to carry the OFDM modulated signal of the target second sequence, and the first receiver demodulates the PSS using OFDM.

[0224] The on symbol of the PSS is used to carry the OFDM modulated signal of the target second sequence, and the first receiver demodulates the PSS using OFDM.

[0225] In a case where the target second sequence is used to carry the first information of the PSS, the terminal device can demodulate the PSS to obtain the target second sequence.

[0226] In the embodiments of the present application, the target second sequence of the PSS can be obtained in the following cases:

[0227] The on symbol of the PSS is used to carry the OFDM modulated signal of the target second sequence, and the first receiver demodulates the PSS using OFDM.

[0228] In a case where the target first sequence and the target second sequence are used to carry the first information of the PSS together, the terminal device can demodulate the PSS to obtain the target second sequence and the target first sequence.

[0229] In the embodiments of the present application, the target second sequence and the target first sequence of the PSS can be obtained in the following cases:

[0230] The on symbol of the PSS is used to carry the OFDM modulated signal of the target second sequence, and the first receiver demodulates the PSS using OFDM.

[0231] In the embodiments of the present application, in a case where the target first sequence is one of the first quantity of first sequences, and the target second sequence is one of the second quantity of second sequences, the combined sequence of the target second sequence and the target first sequence includes a first quantity multiplied by a second quantity, that is, the combined sequence of the target second sequence and the target first sequence includes a second quantity multiplied by a first quantity of candidate combined sequences.

[0232] In an example, the OOK sequence can include N candidate OOK sequences, and the OOK-based LPR of the terminal device detects the OOK sequence through a correlation operation. The cover OFDM sequence can include M candidate sequences, and the OFDM-based LPR of the terminal device detects the cover OFDM sequence through a correlation operation. The terminal device can also use the OFDM-based LPR to determine the position of the on symbol in the process of correlating the cover OFDM sequence, so as to obtain the demodulation result of the OOK signal and determine the OOK sequence through a correlation operation. The cover OFDM sequence and the OOK sequence jointly can exist N*M possible combined sequences, which are used to determine the first information.

[0233] In some embodiments, in a case where the synchronization signal comprises the PSS, the synchronization signal can further comprise a SSS, wherein the terminal device can receive the SSS through the first receiver, and can also receive the SSS through the second receiver.

[0234] In a case where the terminal device receives the SSS through the first receiver

[0235] In some embodiments, the synchronization signal comprises a SSS, and the terminal device receiving the synchronization signal through the first receiver comprises: the terminal device receiving the SSS through the first receiver.

[0236] In some embodiments, the synchronization signal comprises a SSS, and the network device transmitting the synchronization signal comprises:

[0237] The network device transmits the SSS, and the SSS is used for the terminal device to receive through the first receiver.

[0238] Here, the synchronization signal comprises a SSS, the network device transmits the SSS to the terminal device, and the terminal device receives the SSS based on the first receiver.

[0239] In some embodiments, the terminal device receiving the SSS through the first receiver comprises:

[0240] The terminal device receives the SSS through the first receiver, and the terminal device demodulates the SSS through the first receiver.

[0241] In some embodiments, the network device transmitting the SSS comprises: the network device modulating the SSS, and transmitting the SSS.

[0242] It can be understood that the SSS transmitted by the network device to the terminal device is a modulated signal, and the terminal device demodulates the received SSS after receiving the SSS.

[0243] In some embodiments, the terminal device demodulating the SSS through the first receiver comprises:

[0244] The terminal device demodulates the SSS through the first receiver by using a first demodulation manner or a second demodulation manner.

[0245] In the embodiments of the present application, the modulation manner of the network device modulating the SSS comprises one of the following: OOK, FSK, PSK, QAM, OFDM. Among them, the modulation manner used by the network device for SSS modulation can correspond to or not correspond to the demodulation manner used by the terminal device for SSS demodulation.

[0246] In an example, the network device modulates the SSS based on FSK, and the terminal device demodulates the received SSS based on FSK after receiving the SSS.

[0247] In an example, the network device modulates the SSS based on OFDM, and the terminal device demodulates the received SSS based on OOK after receiving the SSS.

[0248] In some embodiments, the signal waveform of the SSS is an On-Off signal, and the value of the On-Off signal in each symbol is on or off.

[0249] In the embodiments of the present application, the On-Off signal can be understood as a signal or sequence composed of symbols with a value of on and symbols with a value of off. One symbol can be understood as one bit corresponding to one sequence in the On-Off signal.

[0250] In the case where the signal waveform of the SSS is an On-Off signal, the SSS can be understood as an SSS sequence. Alternatively, the SSS can be a sequence of 127 bits.

[0251] Here, the signal waveform of the SSS can refer to the signal waveform of the PSS in the case where the PSS is an On-Off signal as shown in FIG. 12, which will not be described here again.

[0252] In the embodiments of the present application, in the case where the signal waveform of the SSS is an On-Off signal, the signal waveform of the SSS is simple, suitable for reception by the first receiver, and the terminal device receives the PSS based on the first receiver, thereby reducing the complexity and power consumption required for PSS and SSS detection, achieving the purpose of power saving.

[0253] In some embodiments, the SSS is an On-Off signal generated based on a target third sequence.

[0254] In some embodiments, the network device modulates based on the target third sequence to obtain the SSS.

[0255] It can be understood that the SSS obtained by the network device modulating based on the target third sequence is an On-Off signal generated based on the target third sequence.

[0256] Alternatively, the target third sequence belongs to a binary sequence.

[0257] In the embodiments of the present application, the sequence type of the target third sequence can include one of the following: M sequence, Gold sequence.

[0258] The length of the SSS is determined based on the length of the target third sequence. If the length of the target third sequence is n bits, the length of the SSS is 2 n -1 bits, and at most 2n -1 sequence.

[0259] In some embodiments, the SSS is a plurality of On-Off signals, each of the On-Off signals is generated based on a target third sequence, the target third sequence corresponding to each of the On-Off signals is the same, or the target third sequence corresponding to at least two of the On-Off signals is different.

[0260] It can be understood that the SSS can be composed of a plurality of SSS short sequences, and each SSS short sequence is generated based on a target third sequence.

[0261] The target third sequence corresponding to each of the On-Off signals of the SSS can be understood as the target third sequence corresponding to each of the SSS short sequences.

[0262] The target third sequence corresponding to at least two of the On-Off signals of the SSS is different, which can be understood as the target third sequence corresponding to different SSS short sequences in the SSS is the same, that is, different SSS short sequences are generated based on different target third short sequences.

[0263] In the case that the target third sequence corresponding to at least two of the On-Off signals of the SSS is different, the target third sequence corresponding to the SSS is a combined sequence of the target third sequence corresponding to each of the On-Off signals.

[0264] In some embodiments, the target third sequence is a sequence set or specified by a protocol.

[0265] In some embodiments, the target third sequence is one of a third number of third sequences, and the third number is a positive integer greater than or equal to 1.

[0266] One third sequence can generate a candidate on-off signal, in the case that the target third sequence is one of a third number of third sequences, the on-off signal of the SSS includes a third number of possibilities, that is, a third number of candidate on-off signals, and the signal waveform of the received SSS is one of the third number of candidate on-off signals.

[0267] In an example, the third number is 336, and the signal waveform of the SSS is one of 336 candidate on-off signals.

[0268] In the embodiments of the present application, there can be a basic third sequence, and different third sequences can be generated by shifting the basic third sequence, wherein different shifts of the basic third sequence can generate different third sequences.

[0269] In one example, the third sequence is an M-sequence. For a basic M-sequence, more M-sequences can be generated through cyclic shifting. Cyclic shifting of an M-sequence refers to moving each bit in the sequence to the left or right according to a certain pattern, that is, shifting the most significant bit or the least significant bit to the other side. A cyclic left shift moves the most significant bit to the least significant bit in sequence. A cyclic right shift moves the least significant bit to the most significant bit in sequence. By cyclically shifting a basic M-sequence, multiple different M-sequences can be generated. An n-level M-sequence has a length of 2^n. n -1, if each cyclic shift is one bit, then a maximum of S=2 can be generated. n -1 cyclic shift sequence (containing the basic m-sequence), i.e., the third sequence; if each cyclic shift is k bits (the cyclic shift offset k), then at most... ) cyclic shift sequences (including the basic m-sequence).

[0270] In one example, the third sequence is the Gold sequence, which is formed by adding the preferred m-sequences modulo 2. Each change in the cyclic shift of one m-sequence yields a new Gold sequence. If the cyclic shifts of two m-sequences in the preferred m-sequence pair are changed simultaneously, and then added modulo 2, a maximum of (2^3)Gold sequences can be formed. n -1)*(2 n -1) Gold sequences. Taking an m-sequence of level 4 as an example, the sequence length is 15. For a preferred pair of m-sequences, 225 Gold sequences can be generated. The Gold sequences generated by a preferred pair of m-sequences can be defined as a Gold sequence group. Multiple preferred pairs of m-sequences correspond to multiple Gold sequence groups.

[0271] When the SSS consists of multiple on-off signals and the target third sequence corresponding to different on-off signals is different, the target third sequence corresponding to the multiple short SSS sequences that make up the SSS can be generated based on different characteristic polynomials.

[0272] In one example, the third sequence is an m-sequence of level 4 with a sequence length of 15. The SSS includes two short SSS sequences. Each short SSS corresponds to 15 m-sequences. Therefore, the SSS sequence includes 15*15=225 candidate sequences.

[0273] In some embodiments, the modulation scheme of SSS includes OOK or OFDM.

[0274] SSS Scenario 1: The modulation mode of SSS is OOK.

[0275] In some embodiments, the SSS is the switching signal of the target third sequence modulated by OOK.

[0276] In some embodiments, the network device modulates the target third sequence to obtain the SSS, including:

[0277] The network device OOK modulates the target third sequence to obtain the SSS.

[0278] The network device OOK modulates the target third sequence to obtain the SSS as a switch signal after OOK modulation of the target third sequence.

[0279] Here, the modulation mode used by the network device for SSS modulation is OOK, and the SSS generated based on OOK modulation can be referred to as an OOK sequence.

[0280] In the case of the target third sequence being one of a third number of third sequences, one third sequence can generate a candidate OOK sequence after OOK modulation, and the OOK sequence includes a third number of possibilities, i.e., a third number of candidate OOK sequences, and the SSS is one of the third number of candidate OOK sequences.

[0281] The network device can directly OOK modulate the target third sequence to obtain the SSS, or can encode the target third sequence and then OOK modulate to obtain the SSS.

[0282] In some embodiments, the terminal device uses a first demodulation or a second demodulation to demodulate the SSS through the first receiver, including:

[0283] The terminal device uses OOK to demodulate the SSS through the first receiver to obtain the target third sequence.

[0284] It can be understood that the SSS is used for the terminal device to demodulate through the first receiver using OOK to obtain the target third sequence.

[0285] Here, the modulation mode of the network device for modulating the SSS is OOK, and the demodulation mode of the terminal device for demodulating the SSS is OOK, i.e., the modulation mode of the SSS corresponds to the demodulation mode of the SSS.

[0286] In the embodiments of the present application, the target third sequence can be used to determine the second information of the SSS.

[0287] In some embodiments, the second information is used to determine the cell identifier.

[0288] The first receiver can detect the received PSS and SSS through time domain correlation operation, thereby reducing the complexity and power consumption of searching for the PSS and SSS.

[0289] SSS scenario two, the modulation mode of the SSS is OFDM

[0290] In some embodiments, the network device modulates the target third sequence to obtain the SSS, including:

[0291] The network device performs OFDM modulation on a target fourth sequence, and carries the signal after OFDM modulation of the target fourth sequence on the on symbol of the SSS.

[0292] It can be understood that the on symbol of the SSS is used to carry the signal after OFDM modulation of the target fourth sequence.

[0293] The network device performs OFDM modulation on a target fourth sequence to obtain a signal after OFDM modulation, i.e., an overlaid OFDM sequence, and carries the overlaid OFDM sequence on the on symbol of the SSS.

[0294] Here, the on symbol of the SSS carries the overlaid OFDM sequence, i.e., the on symbol of the SSS appears as the waveform of the OFDM sequence. It can be understood that in the case of OOK modulation mode of the SSS, the on symbol of the SSS does not carry the overlaid OFDM sequence.

[0295] The signal waveform of the SSS carrying the overlaid OFDM sequence on the on symbol can refer to the signal waveform of the PSS carrying the overlaid OFDM sequence on the on symbol, which will not be repeated here.

[0296] In the embodiments of the present application, the type of the target fourth sequence can include one of the following: M sequence, Gold sequence, ZC sequence (ZC sequence), Chirp sequence, Fourier transform or fast Fourier transform sequence (FT / FFT sequence), Golay sequence, Kasami sequence, low density sequence (Low density sequence), etc.

[0297] The length of the overlaid OFDM sequence on the on symbol of the SSS is determined based on the length of the target fourth sequence. Wherein, the length of the target fourth sequence is m bits, and the length of the overlaid OFDM is 2 m -1 bit, which can generate at most 2 m -1 sequences.

[0298] In some embodiments, the target fourth sequence is a set sequence or a sequence specified by a protocol, i.e., a fixed sequence.

[0299] In some embodiments, the target fourth sequence is one of a fourth number of fourth sequences, and the fourth number is a positive integer greater than or equal to 1.

[0300] It can be understood that one fourth sequence can generate a candidate cover OFDM sequence, in the case that the target fourth sequence is one of a fourth number of fourth sequences, the cover OFDM sequence includes a fourth number of possibilities, i.e., a fourth number of candidate cover OFDM sequences, and the cover OFDM sequence on the on symbol of the SSS is one of the fourth number of candidate cover OFDM sequences, then the signal waveform of the on symbol of the received SSS is one of the fourth number of candidate cover OFDM sequences.

[0301] In the embodiments of the present application, the target fourth sequence can be used to determine the second information of the SSS.

[0302] In some embodiments, the on symbol and the off symbol of the SSS are associated with the target third sequence.

[0303] The on symbol and the off symbol of the SSS can be associated with the target third sequence, or can be associated with the sequence after the target third sequence is encoded.

[0304] In an example, the target third sequence is a binary sequence, the on symbol of the SSS corresponds to 1 in the target third sequence, and the off symbol of the SSS corresponds to 0 in the target third sequence.

[0305] In an example, the target third sequence is a binary sequence, the on symbol of the SSS corresponds to 1 in the sequence after the target third sequence is encoded, and the off symbol of the SSS corresponds to 0 in the sequence after the target third sequence is encoded.

[0306] In the embodiments of the present application, in the case that the on symbol of the SSS carries the cover OFDM sequence, the target third sequence can be used to control the network device to generate the cover OFDM sequence in the part corresponding to the on symbol of the SSS.

[0307] In the second SSS scenario, for the SSS whose on symbol carries the cover OFDM sequence, the demodulation mode adopted by the first receiver includes OOK or OFDM.

[0308] Taking the case that, for the SSS whose on symbol carries the OFDM sequence, the demodulation mode adopted by the first receiver is OOK, the terminal device demodulates the SSS by the first receiver using the first demodulation or the second demodulation mode, including:

[0309] The terminal device demodulates the SSS by the first receiver using OOK to obtain the target third sequence.

[0310] It can be understood that the SSS is used for the terminal device to obtain the target third sequence by OOK demodulation of the first receiver.

[0311] Here, the terminal device detects the SSS by the first receiver based on OOK to obtain the target third sequence.

[0312] The first receiver can detect the SSS to obtain the target third sequence by envelope detection, autocorrelation detection, and other time domain detection.

[0313] In the embodiment of the application, the first receiver performs OOK demodulation on the SSS to obtain the target third sequence, and the target third sequence is used to carry the second information of the SSS.

[0314] Taking the SSS carrying an OFDM sequence of an on symbol as an example, the demodulation mode adopted by the first receiver is OFDM, the terminal device demodulates the SSS by the first receiver in a first demodulation mode or a second demodulation mode, and the demodulation includes:

[0315] The terminal device demodulates the SSS by the first receiver in an OFDM demodulation mode to obtain the target fourth sequence and / or the target third sequence.

[0316] It can be understood that the SSS is used for the terminal device to obtain the target fourth sequence and / or the target third sequence by OFDM demodulation of the first receiver.

[0317] Here, the terminal device detects the SSS by the first receiver based on OFDM to obtain the target third sequence and / or the target fourth sequence.

[0318] In the embodiment of the application, the first receiver based on OFDM performs detection on the SSS covering an OFDM sequence, and determines the position of the on symbol according to the detection result, thereby obtaining the target third sequence.

[0319] In the embodiment of the application, the first receiver based on OFDM performs correlation detection on the SSS to obtain the target fourth sequence. In the case where the first receiver performs correlation detection on the SSS to obtain the target fourth sequence, the first receiver can only perform correlation detection on the on symbol in the SSS, and does not perform detection on the off symbol in the SSS.

[0320] In the embodiment of the application, the first receiver performs OFDM demodulation on the SSS to obtain the target fourth sequence and / or the target third sequence, and the target fourth sequence and / or the target third sequence is used to carry the second information of the SSS.

[0321] In some embodiments, the target fourth sequences corresponding to at least two on symbols in the SSS are the same; or, the target fourth sequences corresponding to at least two on symbols in the SSS are different.

[0322] The target fourth sequence corresponding to the on symbol of the SSS can be understood as that the on symbol of the SSS carries a signal after OFDM modulation of the target fourth sequence, that is, the on symbol of the SSS carries a cover OFDM sequence generated by the target fourth sequence.

[0323] The target fourth sequences corresponding to at least two on symbols of the SSS being the same can be understood as that the target fourth sequences corresponding to different on symbols in the at least two on symbols of the SSS are the same, or the target fourth sequence corresponding to each on symbol of the SSS is the same. The target fourth sequence corresponding to the on symbol is a set sequence or one of the fourth number of fourth sequences.

[0324] In the case that the target fourth sequences corresponding to different on symbols of the SSS are the same, the cover OFDM sequences carried on the different on symbols of the SSS are the same.

[0325] In the case that the target fourth sequence corresponding to each on symbol of the SSS is the same, the cover OFDM sequences carried on each on symbol of the SSS are the same, at this time, the first receiver can demodulate the SSS by OOK or demodulate the SSS by OFDM to obtain the target third sequence.

[0326] In the embodiments of the present application, if the target fourth sequence corresponding to each on symbol of the SSS is the same, the terminal device detects the cover OFDM sequence on different on symbols of the SSS, and can obtain the gain of time diversity and improve the detection performance.

[0327] The target fourth sequences corresponding to at least two on symbols of the SSS being different can be understood as that the target fourth sequences corresponding to different on symbols in the at least two on symbols are different. At this time, the cover OFDM sequences carried on the different on symbols of the SSS are different. The combination of the target fourth sequences corresponding to the at least two on symbols included in the SSS is the target fourth sequence obtained by demodulating the SSS.

[0328] In some embodiments, the target fourth sequences corresponding to at least two on symbols in the SSS are different, including:

[0329] The at least two on symbols correspond to different parts of one target fourth sequence; or,

[0330] The at least two on symbols correspond to different target fourth sequences respectively.

[0331] The target fourth sequence corresponding to one on symbol of the SSS can be a complete target fourth sequence, or a part of a complete target fourth sequence, i.e., a partial target fourth sequence. The time unit of a single target fourth sequence is different, and a longer cover OFDM sequence can be transmitted through the on symbol by corresponding a part of a complete target fourth sequence to one on symbol.

[0332] It can be understood that one target fourth sequence corresponds to L2 on symbols, where L2 is an integer greater than or equal to 1.

[0333] In the case where L2 is greater than 1, the multiple on symbols of the SSS correspond to a complete target fourth sequence, and different on symbols in the multiple on symbols correspond to different parts of a target fourth sequence.

[0334] In the case where L2 is equal to 1, each on symbol in the multiple on symbols of the SSS corresponds to a complete target fourth sequence. Different on symbols can correspond to different target fourth sequences.

[0335] In the case where different on symbols correspond to different target fourth sequences, the combination of the target fourth sequences covered on the multiple on symbols is used to determine the second information of the SSS.

[0336] In an example, there are M candidate combinations of the target fourth sequences on the on symbols on the SSS, where M is determined based on the number of possible fourth sequences of the target fourth sequences on each on symbol in the SSS. There are m on signals on the SSS signal, and the target fourth sequence corresponding to the i th on symbol is one of M fourth sequences, then M is i

[0337] In some embodiments, the target third sequence and / or the target fourth sequence is used to carry the second information of the SSS.

[0338] In the case where the target third sequence is used to carry the second information of the SSS, the terminal device can demodulate the SSS to obtain the target third sequence.

[0339] In the embodiments of the present application, for the SSS, the target third sequence can be obtained in the following cases:

[0340] The SSS is an on-off signal after OOK modulation of the target third sequence, and the first receiver demodulates the SSS by OOK;

[0341] The on symbol of the SSS is used to carry a signal after OFDM modulation of the target fourth sequence, and the first receiver demodulates the SSS by OOK;

[0342] ​The on symbol of the SSS is used to carry an OFDM modulated signal of the target fourth sequence, and the first receiver demodulates the SSS by OFDM.

[0343] In a case where the target fourth sequence is used to carry the second information of the SSS, the terminal device can demodulate the SSS to obtain the target fourth sequence.

[0344] In the embodiments of the present application, for the SSS, the target fourth sequence can be obtained in the following cases:

[0345] The on symbol of the SSS is used to carry an OFDM modulated signal of the target fourth sequence, and the first receiver demodulates the SSS by OFDM.

[0346] In a case where the target third sequence and the target fourth sequence are used to carry the second information of the SSS together, the terminal device can demodulate the SSS to obtain the target fourth sequence and the target third sequence.

[0347] In the embodiments of the present application, for the SSS, the target fourth sequence and the target third sequence can be obtained in the following cases:

[0348] The on symbol of the SSS is used to carry an OFDM modulated signal of the target fourth sequence, and the first receiver demodulates the SSS by OFDM.

[0349] In the embodiments of the present application, in a case where the target third sequence is one of the third number of first sequences, and the target fourth sequence is one of the fourth number of fourth sequences, the combined sequence of the target fourth sequence and the target third sequence includes the fourth number multiplied by the third number of possibilities, that is, the combined sequence of the target fourth sequence and the target third sequence includes the fourth number multiplied by the third number of candidate combined sequences.

[0350] In the embodiments of the present application, the terminal device receives the PSS and the SSS through the first receiver, which can effectively reduce the power consumption required for receiving the synchronization signal.

[0351] In a case where the terminal device receives the SSS through the second receiver

[0352] In some embodiments, the synchronization signal includes an SSS, and the method further includes:

[0353] The terminal device receives the SSS through the second receiver.

[0354] In some embodiments, the synchronization signal includes an SSS, and the method further includes:

[0355] The network device sends the SSS, which is used for the terminal device to receive through the second receiver.

[0356] In the embodiments of the present application, the second receiver supports a third demodulation mode, and the terminal device receives the SSS through the second receiver, and the SSS has strong coverage performance.

[0357] In the case of receiving the SSS through the second receiver, the second receiver detects the SSS through a frequency domain correlation manner, and the second receiver needs to perform FFT processing, and therefore has high power consumption.

[0358] In the embodiments of the present application, the terminal device receives the PSS through the first receiver and receives the SSS through the second receiver, and different parts of the synchronization signal are received through different receivers, so that the strong coverage performance of the SSS is realized while reducing the power consumption required for receiving the PSS, thereby balancing the power consumption and the coverage performance.

[0359] In the embodiments of the present application, in the case that the terminal device includes the first receiver and the second receiver, different receivers can be used to receive the SSS according to different coverage performance requirements. In an example, in the case of high coverage performance requirement, the SSS is received through the second receiver.

[0360] In some embodiments, the synchronization signal is used to implement one or more of the following functions: cell search, synchronization, measurement.

[0361] In some embodiments, the functions of the synchronization signal are implemented through the first information of the PSS and / or the second information of the SSS.

[0362] In the case that the synchronization signal is used to implement different functions, the first information of the PSS and / or the second information of the SSS in the synchronization signal are different.

[0363] In some embodiments, the synchronization signal is used to carry a cell identifier.

[0364] In the case that the synchronization signal is used to implement cell search, that is, initial access, the synchronization signal is used to carry the cell identifier, that is, the first information of the PSS and / or the second information of the SSS are used to determine the cell identifier.

[0365] Optionally, the identifier is a physical cell identifier.

[0366] In some embodiments, the cell identifier is carried in the first information of the PSS, or carried in the second information of the SSS, or carried through the first information of the PSS and the second information of the SSS.

[0367] Optionally, in the case that the cell identifier is carried through the first information of the PSS and the second information of the SSS, the first information is a cell group identifier The first information is an intra-cell group identifier

[0368] In some embodiments, in a case where the synchronization signal comprises the PSS and the SSS, the synchronization signal can further comprise a PBCH, wherein the terminal device can receive the PBCH through the first receiver, and can also receive the PBCH through the second receiver.

[0369] In a scenario where the terminal device receives the PBCH through the first receiver

[0370] In some embodiments, the synchronization signal comprises the PBCH, and the terminal device receiving the synchronization signal through the first receiver comprises: the terminal device receiving the PBCH through the first receiver.

[0371] In some embodiments, the synchronization signal comprises the PBCH, and the network device sending the synchronization signal comprises:

[0372] The network device sends the PBCH, and the PBCH is used for the terminal device to receive through the first receiver.

[0373] Here, the synchronization signal comprises the PBCH, the network device sends the PBCH to the terminal device, and the terminal device receives the PBCH based on the first receiver.

[0374] In some embodiments, the terminal device receiving the PBCH through the first receiver comprises:

[0375] The terminal device receives the PBCH through the first receiver, and the terminal device demodulates the PBCH through the first receiver.

[0376] In some embodiments, the network device sending the PBCH comprises: the network device modulating the PBCH, and sending the PBCH.

[0377] It can be understood that the PBCH sent by the network device to the terminal device is a modulated modulation signal, and the terminal device demodulates the received PBCH after receiving the PBCH.

[0378] In some embodiments, the terminal device demodulating the PBCH through the first receiver comprises:

[0379] The terminal device demodulates the PBCH through the first receiver by using a first demodulation manner or a second demodulation manner.

[0380] In the embodiments of the present application, the modulation mode of the network device for PBCH modulation includes one of the following: OOK, FSK, PSK, QAM, OFDM. Among them, the modulation mode adopted by the network device for PBCH modulation can correspond to the demodulation mode adopted by the terminal device for PBCH demodulation.

[0381] In an example, the network device modulates the PBCH based on FSK, and after receiving the PBCH, the terminal device demodulates the received PBCH based on FSK.

[0382] In an example, the network device modulates the PBCH based on OFDM, and after receiving the PBCH, the terminal device demodulates the received PBCH based on OOK.

[0383] In some embodiments, the signal waveform of the PBCH is an on-off signal, and the on-off signal has a value of on or off in each symbol.

[0384] In the case where the signal waveform of the PBCH is an on-off signal, the PBCH can be understood as a PBCH sequence.

[0385] Here, the signal waveform of the PBCH can refer to the signal waveform of the PSS in the case where the PSS is an on-off signal as shown in FIG. 12, which will not be repeated here.

[0386] In the embodiments of the present application, in the case where the signal waveform of the PBCH is an on-off signal, the signal waveform of the PBCH is simple, suitable for reception by the first receiver, and the terminal device receives the PSS based on the first receiver, thereby reducing the complexity and power consumption required for PSS and PBCH detection, achieving the purpose of power saving.

[0387] In some embodiments, the PBCH is an on-off signal based on a target fifth sequence.

[0388] Optionally, the target fifth sequence belongs to a binary sequence.

[0389] In the embodiments of the present application, the sequence type of the target fifth sequence can include one of the following: M sequence, Gold sequence.

[0390] The length of the PBCH is determined based on the length of the target fifth sequence. Among them, if the length of the target fifth sequence is n bits, then the length of the PBCH is 2 n -1 bits, and at most 2 n -1 sequences can be generated.

[0391] In some embodiments, the PBCH is a plurality of On-Off signals, each of the On-Off signals is generated based on a target fifth sequence, the target fifth sequences corresponding to each of the On-Off signals are the same, or the target fifth sequences corresponding to at least two of the On-Off signals are different.

[0392] It can be understood that the PBCH can be composed of a plurality of PBCH short sequences, and each of the PBCH short sequences is generated based on a target fifth sequence.

[0393] The target fifth sequences corresponding to each of the On-Off signals of the PBCH are the same, and it can be understood that the target fifth sequences corresponding to each of the PBCH short sequences are the same.

[0394] The target fifth sequences corresponding to at least two of the On-Off signals of the PBCH are different, and it can be understood that the target fifth sequences corresponding to different PBCH short sequences in the PBCH are the same, that is, the different PBCH short sequences are generated based on different target fifth short sequences.

[0395] In the case that the target fifth sequences corresponding to at least two of the On-Off signals are different, the target fifth sequence corresponding to the PBCH is a combined sequence of the target fifth sequences corresponding to each of the On-Off signals.

[0396] In some embodiments, the target fifth sequence is a sequence set or agreed by a protocol.

[0397] In some embodiments, the target fifth sequence is one of a fifth number of fifth sequences, and the fifth number is a positive integer greater than or equal to 1.

[0398] One fifth sequence can generate a candidate on-off signal, in the case that the target fifth sequence is one of a fifth number of fifth sequences, the on-off signals of the PBCH include the fifth number of possibilities, that is, the fifth number of candidate on-off signals, and the received signal waveform of the PBCH is one of the fifth number of candidate on-off signals.

[0399] In the embodiments of the present application, there can be a basic fifth sequence, and different fifth sequences can be generated by shifting the basic fifth sequence, and different fifth sequences can be generated by shifting the basic fifth sequence. The description of generating different fifth sequences by shifting the basic fifth sequence can refer to the description of generating different first sequences by shifting the basic first sequence, which will not be repeated here.

[0400] In a case where the PBCH is a plurality of on-off signals and different on-off signals correspond to different target fifth sequences, the target fifth sequences corresponding to the plurality of PBCH short sequences constituting the PBCH can be generated based on different characteristic polynomials respectively.

[0401] In some embodiments, the modulation mode of the PBCH includes OOK or OFDM.

[0402] PBCH scenario one, the modulation mode of the PBCH is OOK

[0403] In some embodiments, the PBCH is an on-off signal after OOK modulation of the target fifth sequence.

[0404] In some embodiments, the network device modulates based on the target fifth sequence to obtain the PBCH, including:

[0405] The network device OOK modulates the target fifth sequence to obtain the PBCH.

[0406] The network device OOK modulates the target fifth sequence to obtain the PBCH, which is an on-off signal after OOK modulation of the target fifth sequence.

[0407] Here, the modulation mode adopted by the network device for PBCH modulation is OOK, and the PBCH generated based on OOK modulation can be referred to as an OOK sequence.

[0408] In a case where the target fifth sequence is one of a fifth number of fifth sequences, one fifth sequence can generate a candidate OOK sequence after OOK modulation, and the OOK sequence includes a fifth number of possibilities, i.e., a fifth number of candidate OOK sequences, and the PBCH is one of the fifth number of candidate OOK sequences.

[0409] The network device can directly OOK modulate the target fifth sequence to obtain the PBCH, or can encode the target fifth sequence and then OOK modulate to obtain the PBCH.

[0410] In some embodiments, the terminal device demodulates the PBCH by the first receiver using a first demodulation or a second demodulation mode, including:

[0411] The terminal device demodulates the PBCH by the first receiver using OOK to obtain the target fifth sequence.

[0412] It can be understood that the PBCH is used for the terminal device to demodulate by the first receiver using OOK to obtain the target fifth sequence.

[0413] Here, the network device modulates the PBCH in the OOK mode, and the terminal device demodulates the PBCH in the OOK mode, that is, the modulation mode of the PBCH corresponds to the demodulation mode of the PBCH.

[0414] In the embodiments of the present application, the target fifth sequence can be used to determine the third information of the PBCH.

[0415] In some embodiments, the third information is broadcast information.

[0416] The first receiver can detect the received PSS and PBCH through a time domain correlation operation, thereby reducing the complexity and power consumption of searching for the PSS and PBCH.

[0417] PBCH scenario two, the modulation mode of the PBCH is OFDM

[0418] In some embodiments, the network device modulates the PBCH based on the target fifth sequence, including:

[0419] The network device performs OFDM modulation on the target sixth sequence, and carries the signal after the OFDM modulation of the target sixth sequence on the on symbol of the PBCH.

[0420] It can be understood that the on symbol of the PBCH is used to carry the signal after the OFDM modulation of the target sixth sequence.

[0421] The network device performs OFDM modulation on the target sixth sequence to obtain the signal after the OFDM modulation, that is, the overlaid OFDM sequence, and carries the overlaid OFDM sequence on the on symbol of the PBCH.

[0422] Here, the on symbol of the PBCH carries the overlaid OFDM sequence, that is, the on symbol of the PBCH appears as the waveform of the OFDM sequence. It can be understood that in the case where the modulation mode of the PBCH is OOK, the on symbol of the PBCH does not carry the overlaid OFDM sequence.

[0423] The signal waveform of the PBCH carrying the overlaid OFDM sequence on the on symbol can refer to the signal waveform of the PSS carrying the overlaid OFDM sequence on the on symbol, which will not be described here.

[0424] In the embodiments of the present application, the type of the target sixth sequence can include one of the following: M sequence, Gold sequence, ZC sequence (ZC sequence), Chirp sequence, Fourier transform or fast Fourier transform sequence (FT / FFT sequence), Golay sequence, Kasami sequence, Low density sequence, etc.

[0425] The length of the cover OFDM sequence on the on symbol of the PBCH is determined based on the length of the target sixth sequence. Wherein, the length of the target sixth sequence is m bits, and the length of the cover OFDM is 2 m -1 bit, and at most 2 m -1 sequences can be generated.

[0426] In some embodiments, the target sixth sequence is a set sequence or a sequence specified by a protocol, i.e., a fixed sequence.

[0427] In some embodiments, the target sixth sequence is one of the sixth number of sixth sequences, and the sixth number is a positive integer greater than or equal to 1.

[0428] It can be understood that one sixth sequence can generate a candidate cover OFDM sequence, and in the case that the target sixth sequence is one of the sixth number of sixth sequences, the cover OFDM sequence includes the sixth number of possibilities, i.e., the sixth number of candidate cover OFDM sequences, and the cover OFDM sequence on the on symbol of the PBCH is one of the sixth number of candidate cover OFDM sequences, then the signal waveform of the received on symbol of the PBCH is one of the sixth number of candidate cover OFDM sequences.

[0429] In the embodiments of the present application, the target sixth sequence can be used to determine the third information of the PBCH.

[0430] In some embodiments, the on symbol and the off symbol of the PBCH are associated with the target fifth sequence.

[0431] The on symbol and the off symbol of the PBCH can be associated with the target fifth sequence, or can be associated with the sequence after the target fifth sequence is encoded.

[0432] In an example, the target fifth sequence is a binary sequence, the on symbol of the PBCH corresponds to 1 in the target fifth sequence, and the off symbol of the PBCH corresponds to 0 in the target fifth sequence.

[0433] In an example, the target fifth sequence is a binary sequence, and the on symbol of the PBCH corresponds to 1 in the coded sequence of the target fifth sequence, and the off symbol of the PBCH corresponds to 0 in the coded sequence of the target fifth sequence.

[0434] In the embodiments of the present application, in the case that the on symbol of the PBCH carries the cover OFDM sequence, the target fifth sequence can be used to control the network device to generate the cover OFDM sequence in the part corresponding to the on symbol of the PBCH.

[0435] In the second PBCH scenario, for the PBCH carrying the cover OFDM sequence on the on symbol, the demodulation mode adopted by the first receiver includes OOK or OFDM.

[0436] Taking the PBCH carrying the OFDM sequence on the on symbol as an example, the terminal device demodulates the PBCH by the first receiver in the first demodulation or second demodulation mode, including: the terminal device demodulates the PBCH by the first receiver in OOK to obtain the target fifth sequence.

[0437] It can be understood that the PBCH is used for the terminal device to obtain the target fifth sequence by demodulating the PBCH by the first receiver in OOK.

[0438] Here, the terminal device detects the PBCH by the first receiver based on OOK to obtain the target fifth sequence.

[0439] The first receiver can detect the PBCH by time domain detection such as envelope detection and autocorrelation detection to obtain the target fifth sequence.

[0440] In the embodiments of the present application, the first receiver demodulates the PBCH in OOK to obtain the target fifth sequence, and the target fifth sequence is used to carry the third information of the PBCH.

[0441] Taking the PBCH carrying the OFDM sequence on the on symbol as an example, the terminal device demodulates the PBCH by the first receiver in the first demodulation or second demodulation mode, including:

[0442] The terminal device demodulates the PBCH by the first receiver in OFDM to obtain the target sixth sequence and / or the target fifth sequence.

[0443] It can be understood that the PBCH is used for the terminal device to obtain the target sixth sequence and / or the target fifth sequence by demodulating the PBCH by the first receiver in OFDM.

[0444] Here, the terminal device detects the PBCH by the first receiver based on OFDM to obtain the target sixth sequence and / or the target fifth sequence.

[0445] In the embodiments of the present application, the first receiver based on OFDM detects the PBCH to cover the OFDM sequence, and determines the position of the on symbol according to the detection result, so as to obtain the target fifth sequence.

[0446] In the embodiments of the present application, the first receiver based on OFDM detects the PBCH to cover the OFDM sequence, and determines the position of the on symbol according to the detection result, so as to obtain the target fifth sequence.

[0447] In the embodiments of the present application, the first receiver based on OFDM detects the PBCH to cover the OFDM sequence, and determines the position of the on symbol according to the detection result, so as to obtain the target fifth sequence.

[0448] In some embodiments, the target sixth sequences corresponding to at least two on symbols in the PBCH are the same; or, the target sixth sequences corresponding to at least two on symbols in the PBCH are different.

[0449] The target sixth sequence corresponding to the on symbol of the PBCH can be understood as that the on symbol of the PBCH carries the signal after OFDM modulation of the target sixth sequence, that is, the on symbol of the PBCH carries the cover OFDM sequence generated by the target sixth sequence.

[0450] The target sixth sequences corresponding to at least two on symbols of the PBCH are the same, which can be understood as that the target sixth sequences corresponding to different on symbols in the at least two on symbols of the PBCH are the same, or the target sixth sequences corresponding to each on symbol of the PBCH are the same. The target sixth sequence corresponding to the on symbol is a set sequence or one of the sixth sequences of the sixth quantity.

[0451] In the case that the target sixth sequences corresponding to different on symbols of the PBCH are the same, the cover OFDM sequences carried on the different on symbols of the PBCH are the same.

[0452] In the case that the target sixth sequences corresponding to each on symbol of the PBCH are the same, the cover OFDM sequences carried on each on symbol of the PBCH are the same, at this time, the first receiver can demodulate the PBCH by OOK or demodulate the PBCH by OFDM to obtain the target fifth sequence.

[0453] In this embodiment of the application, if the target sixth sequence corresponding to each on symbol of the PBCH is the same, the terminal device can obtain the temporal diversity gain and improve the detection performance by detecting the covered OFDM sequence on different on symbols of the PBCH.

[0454] The fact that at least two on symbols of a PBCH correspond to different target sixth sequences can be understood as different target sixth sequences corresponding to different on symbols within those at least two on symbols. In this case, the OFDM overlay sequences carried on different on symbols of the PBCH are different. The combination of target sixth sequences corresponding to at least two on symbols included in the PBCH constitutes the target sixth sequence obtained by demodulating the PBCH.

[0455] In some embodiments, at least two on symbols in the PBCH correspond to different target sixth sequences, including:

[0456] The at least two on symbols correspond to different parts of a target sixth sequence; or, the at least two on symbols correspond to different target sixth sequences respectively.

[0457] A single on symbol in a PBCH corresponds to a target sixth sequence that can be a complete target sixth sequence or a part of a complete target sixth sequence (i.e., a partial target sixth sequence). Since the time units of individual target sixth sequences differ, a longer overlay OFDM sequence can be transmitted using one on symbol corresponding to a part of a complete target sixth sequence.

[0458] Understandably, a target sixth sequence corresponds to L3 on symbols, where L3 is an integer greater than or equal to 1.

[0459] When L2 is greater than 1, multiple on symbols in PBCH correspond to a complete target sixth sequence, and different on symbols among the multiple on symbols correspond to different parts of a target sixth sequence.

[0460] When L2 equals 1, each of the multiple on symbols in PBCH corresponds to a complete target fourth sequence. Different on symbols can correspond to different target fourth sequences.

[0461] In some embodiments, the target fifth sequence and / or the target sixth sequence are used to carry broadcast information of the PBCH.

[0462] When the target fifth sequence is used to carry broadcast information of PBCH, the terminal device can demodulate PBCH to obtain the target fifth sequence.

[0463] In the embodiments of this application, the target fifth sequence can be obtained for PBCH under the following conditions:

[0464] PBCH is an on-off keying (OOK) modulated signal of the target fifth sequence, and the first receiver demodulates the PBCH using OOK;

[0465] PBCH is an OOK modulated signal of the target sixth sequence, and the first receiver demodulates the PBCH using OOK;

[0466] PBCH is an OOK modulated signal of the target sixth sequence, and the first receiver demodulates the PBCH using OOK.

[0467] In the case where the target sixth sequence is used to carry broadcast information of the PBCH, the terminal device can demodulate the PBCH to obtain the target sixth sequence.

[0468] In the case where the target sixth sequence is used to carry broadcast information of the PBCH, the terminal device can demodulate the PBCH to obtain the target sixth sequence.

[0469] PBCH is an OOK modulated signal of the target sixth sequence, and the first receiver demodulates the PBCH using OOK.

[0470] In the case where the target sixth sequence is used to carry broadcast information of the PBCH, the terminal device can demodulate the PBCH to obtain the target sixth sequence and the target fifth sequence.

[0471] In the case where the target sixth sequence is used to carry broadcast information of the PBCH, the terminal device can demodulate the PBCH to obtain the target sixth sequence and the target fifth sequence.

[0472] PBCH is an OOK modulated signal of the target sixth sequence, and the first receiver demodulates the PBCH using OOK.

[0473] In some embodiments, the broadcast information can include an index (index) corresponding to a synchronization signal or a broadcast channel, such as an index of a synchronization signal, and can include subcarrier spacing information, control channel resource information, cell access control information, system frame number information, auxiliary search information, etc.

[0474] In the case where the target fifth sequence is one of the fifth number of first sequences and the target sixth sequence is one of the sixth number of sixth sequences, the combined sequence of the target sixth sequence and the target fifth sequence includes the sixth number multiplied by the fifth number of possibilities, i.e., the combined sequence of the target sixth sequence and the target fifth sequence includes the sixth number multiplied by the fifth number of candidate combined sequences.

[0475] In the embodiments of the present application, the terminal device receives the PSS and the PBCH through the first receiver, which can effectively reduce the power consumption required for synchronization signal reception.

[0476] In a scenario where the terminal device receives the PBCH through the second receiver

[0477] In some embodiments, the synchronization signal comprises a PBCH, and the method further comprises:

[0478] The terminal device receives the PBCH through the second receiver.

[0479] In some embodiments, the synchronization signal comprises a PBCH, and the method further comprises:

[0480] The network device transmits the PBCH, and the PBCH is used for the terminal device to receive through the second receiver.

[0481] In the embodiments of the present application, the second receiver supports a third demodulation mode, and in the case where the terminal device receives the PBCH through the second receiver, the demodulation mode of the PBCH is the third demodulation mode, and the PBCH has strong coverage performance.

[0482] In the case where the PBCH is received through the second receiver, the second receiver detects the PBCH through a frequency domain correlation manner, and therefore needs to perform FFT processing, and thus has high power consumption.

[0483] In the embodiments of the present application, the terminal device receives the PSS through the first receiver and receives the PBCH through the second receiver, and different parts of the synchronization signal are received through different receivers, so that the power consumption required for receiving the PSS is reduced, and the strong coverage performance of the PBCH is realized, thereby balancing the power consumption and the coverage performance.

[0484] In some embodiments, based on the wireless communication method shown in FIG. 8, as shown in FIG. 17, the wireless communication method provided in the embodiments of the present application further comprises:

[0485] S802, the terminal device receives system messages according to the synchronization signal.

[0486] In some embodiments, based on the wireless communication method shown in FIG. 9, as shown in FIG. 18, the wireless communication method provided in the embodiments of the present application further comprises:

[0487] S902, the network device transmits system messages according to the synchronization signal.

[0488] Optionally, the system messages can be SIB1.

[0489] In the embodiments of the present application, in the case where the synchronization signal is used for an initial access process, the terminal device receives system messages according to the synchronization signal, so as to complete the initial access process based on the received system messages.

[0490] In some embodiments, S802 comprises:

[0491] The terminal device receives the system message according to the PBCH in the synchronization signal; wherein the PBCH is used to indicate control resource information, the control resource information is used to receive a physical downlink control channel, and the PDCCH is used to schedule the system message.

[0492] In some embodiments, S902 comprises:

[0493] The network device sends the system message according to the PBCH in the synchronization signal; wherein the PBCH is used to indicate control resource information, the control resource information is used to receive a physical downlink control channel, and the PDCCH is used to schedule the system message.

[0494] In the embodiments of the present application, the terminal device first detects the PSS, then monitors the SSS according to the detection result of the PSS, and further demodulates the PBCH. The broadcast information of the PBCH can obtain control channel resource information. The terminal device detects the PDCCH through the control channel resource information, and obtains the SIB1 through the scheduling of the PDCCH. The SIB1 is carried in the PDSCH.

[0495] In the embodiments of the present application, the terminal device can receive the system message through the first receiver, or can receive the system message through the second receiver.

[0496] In the scenario that the terminal device receives the system message through the first receiver

[0497] In some embodiments, S802 comprises:

[0498] The terminal device receives the system message through the first receiver according to the synchronization signal.

[0499] In some embodiments, S902 comprises:

[0500] The network device sends the system message according to the synchronization signal, and the system message is used for the terminal device to receive through the first receiver.

[0501] In some embodiments, the terminal device receives the system message through the first receiver comprises:

[0502] The terminal device receives the system message through the first receiver, and the terminal device demodulates the system message through the first receiver.

[0503] In some embodiments, the network device sends the system message comprises:

[0504] The network device modulates the system message and transmits the system message.

[0505] It can be understood that the system message transmitted by the network device to the terminal device is a modulated signal, and the terminal device demodulates the received system message after receiving the system message.

[0506] In some embodiments, the terminal device demodulates the system message through the first receiver includes:

[0507] The terminal device demodulates the system message through the first receiver by using a first demodulation mode or a second demodulation mode.

[0508] In the embodiments of the present application, the modulation mode of the network device for modulating the system message includes one of the following: OOK, FSK, PSK, QAM, OFDM. Among them, the modulation mode used by the network device for modulating the system message and the demodulation mode used by the terminal device for demodulating the system message can correspond or not correspond.

[0509] In some embodiments, the signal waveform of the system message is an on-off signal, and the on-off signal takes on or off on each symbol.

[0510] Here, the signal waveform of the system message can refer to the signal waveform of the PSS when the PSS is an on-off signal as shown in FIG. 12, which will not be described here.

[0511] In the embodiments of the present application, when the signal waveform of the system message is an on-off signal, the signal waveform of the system message is simple, suitable for receiving by the first receiver, and the terminal device receives the PSS based on the first receiver, thereby reducing the complexity and power consumption required for PSS and system message detection, achieving the purpose of power saving.

[0512] In some embodiments, the network device modulates the system message includes:

[0513] The network device obtains the system message based on the modulation of the target seventh sequence.

[0514] It can be understood that the system message is an on-off signal generated based on the target seventh sequence.

[0515] Optionally, the target seventh sequence belongs to a binary sequence.

[0516] In the embodiments of the present application, the sequence type of the target seventh sequence can include one of the following: M sequence, Gold sequence.

[0517] The length of the system message is determined based on the length of the target seventh sequence. Wherein, if the length of the target seventh sequence is n bits, the length of the PBCH is 2 n -1 bits, and at most 2 n -1 sequences can be generated.

[0518] In some embodiments, the system message is a plurality of On-Off signals, each of the On-Off signals is generated based on a target seventh sequence, the target seventh sequences corresponding to each of the On-Off signals are the same, or the target seventh sequences corresponding to at least two of the On-Off signals are different.

[0519] It can be understood that the system message can be composed of a plurality of system message short sequences, and each of the system message short sequences is generated based on a target seventh sequence.

[0520] The target seventh sequences corresponding to each of the On-Off signals of the system message are the same, which can be understood as the target seventh sequences corresponding to each of the system message short sequences are the same.

[0521] The target seventh sequences corresponding to at least two of the On-Off signals of the system message are different, which can be understood as the target seventh sequences corresponding to different system message short sequences in the system message are the same, i.e., the different system message short sequences are generated based on different target seventh short sequences.

[0522] In the case where the target seventh sequences corresponding to at least two of the On-Off signals are different, the target fifth sequence corresponding to the system message is a combined sequence of the target seventh sequences corresponding to each of the On-Off signals.

[0523] In some embodiments, the target seventh sequence is a sequence set or specified by a protocol.

[0524] In some embodiments, the target seventh sequence is one of a seventh number of seventh sequences, and the seventh number is a positive integer greater than or equal to 1.

[0525] In some embodiments, the modulation mode of the system message includes OOK or OFDM.

[0526] In the system message scenario one, the modulation mode of the system message is OOK

[0527] In some embodiments, the network device obtains the system message based on the modulation of the target seventh sequence, including:

[0528] The network device performs OOK modulation on the target seventh sequence to obtain the system message.

[0529] It can be understood that the system message is an on-off signal after OOK modulation of the target seventh sequence.

[0530] Here, the modulation manner adopted by the network device for modulating the system message is OOK, and the PBCH generated based on OOK modulation can be referred to as an OOK sequence.

[0531] The network device can directly perform OOK modulation on the target seventh sequence to obtain the system message, or can perform encoding on the target seventh sequence and then perform OOK modulation to obtain the system message.

[0532] In some embodiments, the terminal device demodulates the system message by using the first demodulation or the second demodulation manner through the first receiver, including:

[0533] The terminal device demodulates the system message by using OOK through the first receiver to obtain the target seventh sequence.

[0534] It can be understood that the system message is used for the terminal device to demodulate the target seventh sequence by using OOK through the first receiver.

[0535] Here, the modulation manner of the network device for modulating the system message is OOK, and the demodulation manner of the terminal device for demodulating the system message is OOK, that is, the modulation manner of the system message corresponds to the demodulation manner of the system message.

[0536] In the embodiments of the present application, the target seventh sequence can be used to determine the system information of the system message.

[0537] In the second system message scenario, the modulation manner of the system message is OFDM

[0538] In some embodiments, the network device modulates the system message, including: the network device modulates a target eighth sequence, and carries a signal of the target eighth sequence after OFDM modulation on the on symbol of the system message.

[0539] It can be understood that the on symbol of the system message is used to carry the signal of the target eighth sequence after OFDM modulation.

[0540] The network device performs OFDM modulation on the target eighth sequence to obtain the signal after OFDM modulation, that is, an overlaid OFDM sequence, and carries the overlaid OFDM sequence on the on symbol of the system message.

[0541] Here, the on symbol of the system message carries the overlaid OFDM sequence, that is, the on symbol of the system message is in the waveform of the OFDM sequence. It can be understood that in the case where the modulation manner of the system message is OOK, the on symbol of the system message does not carry the overlaid OFDM sequence.

[0542] The signal waveform of the system message carrying the covering OFDM sequence on the on symbol can refer to the signal waveform of the PSS carrying the covering OFDM sequence on the on symbol, which is not described herein again.

[0543] In the embodiments of the present application, the type of the target eighth sequence can include one of the following: M sequence, Gold sequence, ZC sequence (ZC sequence), Chirp sequence, Fourier transform or fast Fourier transform sequence (FT / FFT sequence), Golay sequence, Kasami sequence, low density sequence (Low density sequence), etc.

[0544] In some embodiments, the target eighth sequence is a sequence set or a sequence specified by a protocol, i.e., a fixed sequence.

[0545] In some embodiments, the target eighth sequence is one of the eighth number of eighth sequences, and the eighth number is a positive integer greater than or equal to 1.

[0546] In the embodiments of the present application, the target eighth sequence can be used to determine the system information of the system message.

[0547] In some embodiments, the on symbol and the off symbol of the PBCH are associated with the target seventh sequence.

[0548] The on symbol and the off symbol of the system message can be associated with the target seventh sequence, or can be associated with the sequence after the target seventh sequence is encoded.

[0549] In the embodiments of the present application, in the case that the on symbol of the system message carries the covering OFDM sequence, the target seventh sequence can be used to control the network device to generate the covering OFDM sequence in the part corresponding to the on symbol of the system message.

[0550] In the second system message scenario, for the system message carrying the covering OFDM sequence on the on symbol, the demodulation mode used by the first receiver includes OOK or OFDM.

[0551] Taking the case that the demodulation mode used by the first receiver for the system message carrying the OFDM sequence on the on symbol is OOK, the terminal device demodulates the system message by the first receiver using the first demodulation or the second demodulation mode, including:

[0552] The terminal device demodulates the system message by the first receiver using OOK to obtain the target seventh sequence.

[0553] It can be understood that the system message is used for the terminal device to obtain the target seventh sequence by demodulating the system message by the first receiver in the OOK manner.

[0554] Here, the terminal device obtains the target seventh sequence by detecting the system message by the first receiver in the OOK manner.

[0555] Taking the demodulation manner of the first receiver as the OFDM for the system message carrying the OFDM sequence of the on symbol as an example, the terminal device demodulates the system message by the first receiver in the first demodulation manner or the second demodulation manner, and the demodulation manner includes:

[0556] The terminal device demodulates the system message by the first receiver in the OFDM manner to obtain the target eighth sequence and / or the target seventh sequence.

[0557] It can be understood that the system message is used for the terminal device to obtain the target eighth sequence and / or the target seventh sequence by demodulating the system message by the first receiver in the OFDM manner.

[0558] The terminal device obtains the target eighth sequence and / or the target seventh sequence by detecting the system message by the first receiver in the OFDM manner.

[0559] In the embodiment of the application, the first receiver in the OFDM manner detects the system message by covering the OFDM sequence, and determines the position of the on symbol according to the detection result, so as to obtain the target seventh sequence.

[0560] In the embodiment of the application, the first receiver in the OFDM manner detects the system message by covering the OFDM sequence, and determines the position of the on symbol according to the detection result, so as to obtain the target seventh sequence.

[0561] In some embodiments, the target eighth sequences corresponding to at least two on symbols in the system message are the same; or, the target eighth sequences corresponding to at least two on symbols in the system message are different.

[0562] In some embodiments, the target eighth sequences corresponding to at least two on symbols in the system message are different, and the target eighth sequences include:

[0563] The at least two on symbols correspond to a different part of the target eighth sequence; or, the at least two on symbols correspond to different target eighth sequences respectively.

[0564] In some embodiments, the target seventh sequence and / or the target eighth sequence is used to carry system information of the system message.

[0565] In the embodiments of the present application, the system information can be carried by the OOK signal, can be carried by the covered OFDM sequence, and can be jointly carried by the two.

[0566] In the embodiments of the present application, the bit number of the effective SIB1 information is relatively large, and it is not an efficient way to carry the SIB1 information by the OOK signal or the covered OFDM sequence. Therefore, the SIB1 can be further simplified, or a new SIB1 can be defined, to reduce the size of the system information, so as to adapt to the carrying of the system information of the system message, and to realize that the terminal device receives the system information by the first receiver and realizes low power consumption.

[0567] In the scenario that the terminal device receives the system message by the second receiver

[0568] In some embodiments, S802 comprises:

[0569] The terminal device receives the system message by the second receiver according to the synchronization signal.

[0570] In some embodiments, S902 comprises:

[0571] The network device transmits the system message according to the synchronization signal, and the system message is used for the terminal device to receive by the second receiver.

[0572] It can be understood that the system message is used for the terminal device to receive by the second receiver according to the synchronization signal.

[0573] In the embodiments of the present application, the second receiver supports a third demodulation mode, and in the case that the terminal device receives the system message by the second receiver, the demodulation mode of the system message is the third demodulation mode, and the system message has strong coverage performance.

[0574] In the case that the terminal device receives the system message by the second receiver, the second receiver detects the system message by the frequency domain correlation mode, and therefore needs to perform FFT processing, and has high power consumption.

[0575] In the embodiments of the present application, the terminal device receives the PSS by the first receiver, and receives the system message by the second receiver, and combines the synchronization signal and the system message by different receivers respectively, so as to reduce the power consumption required for receiving the synchronization signal, and realize the strong coverage performance of the system message, thereby balancing the power consumption and the coverage performance.

[0576] Next, the wireless communication method provided by the embodiments of the present application is described by taking the synchronization signal used for cell search as an example.

[0577] The embodiment of the present application provides a design method of a synchronization signal, which can enable a terminal device to perform cell search through a low-power receiver. Correspondingly, the waveform of the synchronization signal is suitable for detection of the UE through the low-power receiver, so as to enhance the cell search process and realize more power-saving cell search.

[0578] Design of a synchronization signal

[0579] In order to realize low-power cell search, the UE needs to have LPR, and searches for the synchronization signal through the LPR, so as to achieve the purpose of power saving. Compared with the high power consumption of the traditional receiver based on OFDM, the OOK and FSK receivers based on envelope detection are more power-saving, or the power consumption of the LPR based on the OFDM waveform is lower than that of the traditional OFDM receiver. Therefore, the waveform of the synchronization signal also needs to support the detection of the LPR. The waveform of the synchronization signal sent by the network can include OOK, FSK or PSK, or can be an OFDM sequence.

[0580] The synchronization signal includes PSS and SSS. Through the sequence detection result of the PSS and the SSS, the physical cell ID can be determined.

[0581] For example, there are three candidate sequences of the PSS, and through the three sequences, the parameters There are 336 candidate sequences of the SSS, and the parameters The PSS and the SSS in combination can indicate 1008 physical cell IDs.

[0582] PSS signal

[0583] The PSS signal adopts OOK modulation

[0584] In order to realize the energy saving of the UE in cell search, for the waveform of the PSS signal, a modulation mode other than OFDM can be used, such as OOK.

[0585] Taking the PSS signal based on the M sequence generation as an example, the M sequence is a kind of pseudo-random binary sequence, which is generated by a linear feedback shift register (LFSR) and has a specific length and characteristics. The length of the M sequence is 2 n -1, wherein n is the number of bits of the register. For example, n=3, the sequence length is 2 3 -1, that is, 7 bits. The M sequence has good autocorrelation and randomness, and is often used for testing and synchronization signals. A longer m sequence can obtain better autocorrelation and randomness. For example, the sequence length of the PSS is 127. In an example, the M sequence with a length of 7 is taken as the PSS for illustration, for example, the M sequence is 1101001, and the OOK signal generated after the OOK modulation of the sequence 1101001 is shown in FIG. 13.

[0586] Manchester coding is a line coding technique. In Manchester coding, a bit is represented by a change in level to indicate the value of the bit. This coding ensures that there is at least one level change in each signal element, providing an opportunity for clock synchronization. A bit value of 0 is represented by a change from high to low level. A bit value of 1 is represented by a change from low to high level. Since each bit contains a level transition, the receiver can use this characteristic to synchronize the data stream. At the same time, the receiver can recover the clock used at the time of transmission from the received signal, so that a separate clock signal channel is not required. After Manchester coding, the M sequence 1101001 is modulated by OOK to generate an OOK signal as shown in FIG. 14.

[0587] The PSS is the first signal searched by the terminal device in the cell search process, and it usually uses fewer candidate sequences. For example, the PSS needs to include 3 possibilities, and the UE can detect the PSS through a time domain correlation operation, thereby reducing the complexity and power consumption of searching for the PSS. In the embodiments of the present application, the UE can further reduce the complexity and power consumption of searching for the PSS in the cell search process through the LPR. Therefore, at least for the PSS signal, a signal waveform that can be received by the LPR, such as an OOK modulated waveform, can be designed.

[0588] The PSS signal adopts an OFDM sequence

[0589] In the embodiments of the present application, the on signal in the OOK signal can be generated by covering the OFDM sequence. This is also applicable to the waveform of the PSS signal. After Manchester coding, the M sequence 1101001 is modulated by OOK to generate an OOK signal as shown in FIG. 15, wherein the on signal is covered by an OFDM sequence.

[0590] Under this signal structure, the UE can detect the SSS through the OOK-based LPR, and can also detect the PSS through the OFDM-based LPR or MR, depending on different coverage scenarios.

[0591] The information corresponding to the PSS for determining the physical cell ID, such as may be carried by the OOK sequence, may be carried by the covered OFDM sequence, or may be jointly carried by the covered OFDM sequence and the OOK sequence.

[0592] The description of the PSS signal adopting the covered OFDM sequence can be referred to the description of the SSS signal adopting the covered OFDM sequence, which will not be repeated here.

[0593] In addition to using the sequence to carry information for determining the physical cell ID, the OOK signal can also be used to carry information bits, and the information for determining the physical cell ID is carried by the carried information bits. This is because the OOK signal has lower power consumption by detecting the OOK signal based on LPR. At this time, the OOK signal is equivalent to an information-carrying channel that carries information for determining the physical cell ID. Specifically, in order to facilitate the reception of the OOK signal carrying information, the OOK signal can have a preamble, which is a fixed sequence, facilitating the UE to search for the OOK signal.

[0594] SSS signal

[0595] After searching for the PSS signal, the UE further detects the SSS to obtain the cell ID. The number of candidate sequences of the SSS is generally large, such as 336 candidate sequences of the SSS in the NR system. The increase in the number of candidate sequences requires a longer sequence to ensure good autocorrelation, which will cause a long signal duration for OOK modulation, increasing the detection delay and complexity of the SSS signal. Taking the NR system as an example, the SSS is a Gold sequence with a length of 127, occupying 127 REs in the frequency domain. For the detection of the SSS, the UE can use time domain correlation or frequency domain correlation. At this time, the SSS is an OFDM modulated signal, and the receiver for detecting the SSS needs to support OFDM demodulation. In the demodulation mode using time domain correlation, the receiver can not use the FFT module, can achieve lower receiver power, and can realize low-power OFDM signal reception. In the demodulation mode using frequency domain correlation, the receiver needs to have and enable the FFT module, and needs higher receiver power.

[0596] Based on the above analysis, the SSS signal can use OOK modulation or OFDM modulation or use an OFDM sequence.

[0597] SSS signal using OOK modulation

[0598] In order to maximize the low-power detection of the SSS signal, the SSS signal can use OOK modulation. In order to reduce the detection delay and complexity of detecting the long sequence of the OOK modulation, the SSS can be composed of multiple short sequences. Through the detection results of the multiple short sequences, combined with the detection results of the PSS, the physical cell ID can be obtained.

[0599] Taking the M sequence as an example, the number of stages n of the linear feedback shift register determines the length of the M sequence, and the characteristic polynomial and the initial state of the shift register can determine the generation of the M sequence with a length of 2 nM sequence of -1. Different characteristic polynomials can produce different M sequences, and under a certain degree, N different characteristic polynomials correspond to N basic M sequences. Since the characteristic polynomial needs to be a primitive polynomial, the number of primitive polynomials under different degrees is limited, and after a given degree, the number of basic M sequences of the degree is known.

[0600] For a basic M sequence, more M sequences can be generated by cyclic shift. The cyclic shift of the M sequence refers to moving each bit in the sequence to the left or right according to a certain rule, that is, moving the highest bit or the lowest bit to the other side. The cyclic left shift operation is to move the high bits of the sequence to the low bits in order by a certain number of bits. The cyclic right shift operation is to move the low bits of the sequence to the high bits in order by a certain number of bits. By cyclic shift of a basic M sequence, multiple different M sequences can be generated. The length of an n-degree M sequence is 2 n -1, if each cyclic shift is one bit, then a maximum of S = 2 n -1 cyclic shift sequences (including the basic M sequence) can be generated; if each cyclic shift is k bits (offset k of the cyclic shift), then a maximum of ( -1 cyclic shift sequences (including the basic M sequence) can be generated.

[0601] Therefore, multiple sequences that make up the SSS can be generated based on different characteristic polynomials, respectively. For example, select an M sequence of degree 4, and the sequence length is 15. There are 2 basic M sequences, and each basic M sequence can generate 15 M sequences by cyclic shift. If two basic M sequences that make up the SSS have 15 candidate sequences, respectively, then two M sequences can represent 15*15 = 225 detection values related to the physical cell ID.

[0602] Taking the Gold sequence as an example, the Gold sequence is composed of M sequences preferred modulo 2 addition, and each change of the cyclic shift of an M sequence can obtain a new Gold sequence. If the cyclic shifts of two M sequences in the M sequence preferred pair are changed at the same time, and then modulo 2 addition is performed, a maximum of (2 n -1)*(2 n -1) Gold sequences can be formed. Taking an M sequence of degree 4 as an example, the sequence length is 15. For an M sequence preferred pair, 225 Gold sequences can be generated. The Gold sequences generated by an M sequence preferred pair can be defined as a Gold sequence group. Multiple M sequence preferred pairs correspond to multiple Gold sequence groups.

[0603] In addition to using the OOK sequence to carry information for determining the physical cell ID, the OOK signal can also be used to carry information bits, and the information bits carried are used to determine the physical cell ID.

[0604] SSS signal adopts OFDM modulation

[0605] The SSS signal can adopt an OFDM modulated sequence. (In the embodiments of the present application, the OFDM sequence represents an OFDM sequence of the PSS or SSS generated by the related technology, and the cover OFDM sequence represents an OFDM sequence of the on signal covered in the OOK signal.)

[0606] In order to realize low-power detection, the LPR can detect the SSS in a time domain correlation manner, and the LPR can not use the FFT module, so that a lower receiver power can be achieved. At this time, it is required that the frequency domain bandwidth of the SSS signal has sufficient guard interval with other signals in the frequency domain.

[0607] Further, another possible detection manner is that the UE detects the SSS in a frequency domain correlation manner, and the receiver needs to perform FFT processing, so that the power consumption is relatively high. At this time, the receiver of the UE for detecting the SSS is not much different from the existing OFDM receiver, for example, the UE detects the SSS through the main receiver (MR, Main Radio).

[0608] Generally, the UE can simultaneously have the LPR and the MR that can detect the OFDM signal, and they have different coverage performances. In some scenarios in which the coverage performance needs to be improved, the UE can start the MR to detect the SSS.

[0609] SSS adopts cover OFDM sequence

[0610] The SSS signal can generate the on signal in the OOK signal through the cover OFDM sequence. This is also applicable to the waveform of the SSS signal. After the Manchester coding of the M sequence 1101001, the OOK modulation is performed to generate the waveform as shown in FIG. 15.

[0611] Under this signal structure, the UE can detect the SSS through the OOK-based LPR, or can detect the SSS through the OFDM-based LPR or MR, depending on different coverage scenarios.

[0612] Specifically, the OFDM sequence covered by the on signal in the OOK signal can be a fixed sequence, or can be a plurality of possible candidate sequences.

[0613] If it is a fixed sequence, the OFDM-based LPR of the UE determines the on signal only through the detection of the cover OFDM sequence, so as to detect the OOK sequence. At this time, the information corresponding to the SSS sequence for determining the physical cell ID, such as the OOK sequence, is carried.

[0614] If there are multiple candidate sequences for the covering OFDM sequence, the UE's OFDM-based LPR can determine the covered OFDM sequence through detection of the covering OFDM sequence, the OFDM sequence used by the SSS signal, information that can be used to determine the physical cell ID, such as

[0615] Further, the information used to determine the physical cell ID can be jointly carried by the covering OFDM sequence and the OOK sequence. For example, the OOK sequence can include N candidate sequences, and the UE's OOK-based LPR detects the OOK sequence through correlation operation. The covering OFDM sequence can include M candidate sequences, and the UE's OFDM-based LPR detects the covering OFDM sequence through correlation operation. The UE can also use the OFDM-based LPR to determine the position of the on symbol according to the correlation result in the correlation process of the covering OFDM sequence, thereby obtaining the demodulation result of the OOK signal and determining the OOK sequence through correlation operation. The covering OFDM sequence and the OOK sequence jointly can exist N*M possible combination sequences, which can be used to determine the information of the physical cell ID, such as

[0616] The OFDM sequences covered by different on signals in the OOK signal can be the same sequence or different sequences.

[0617] If they are the same sequence, the UE detects the covering OFDM sequence on different on signals, which can obtain the gain of time diversity and improve the detection performance.

[0618] If they are different sequences, the UE's OFDM-based LPR can determine the OFDM sequences covered by different on signals through detection of the covering OFDM sequence, and the combination of these sequences can obtain information used to determine the physical cell ID, such as For example, there are 2 on signals in the OOK signal, the first on signal covers OFDM sequences including N candidate sequences, and the second on signal covers OFDM sequences including M candidate sequences. The covering OFDM sequences on the 2 on signals can exist N*M possible combination sequences, which can be used to determine the information of the physical cell ID.

[0619] Specifically, the on signal in the OOK signal covering the OFDM sequence can be a complete covering OFDM sequence, or a part of the covering OFDM sequence. The time unit of transmitting a single covering OFDM sequence is different, and a longer covering OFDM sequence can be transmitted through the OOK signal by transmitting a part of the complete covering OFDM sequence on 1 OOK symbol. The LPR of the UE performs correlation detection on the received signals from multiple on signals, and does not include off signals. As shown in FIG. 16, the lengths of sequence 1610, sequence 1620, and sequence 1630 are different, and they are transmitted through 4, 2, and 1 on signals, respectively.

[0620] Design of broadcast channel

[0621] After the UE searches for the PSS and SSS and determines the physical cell ID through the PSS and SSS, the UE needs to receive the PBCH to obtain the broadcast information. The broadcast information can be carried through the OOK modulated signal. At this time, the OOK signal can not only carry the broadcast information through the OOK sequence, but also directly carry the payload of the broadcast information, such as the information bits after encoding of the broadcast information and the corresponding CRC check bits, through the OOK signal. It can be received by the OOK-based LPR. If the on signal in the OOK signal covers a fixed OFDM sequence, the detection of the OOK signal can also be received by the OFDM-based LPR.

[0622] The on signal in the OOK signal of the PBCH can cover the OFDM sequence, and the corresponding broadcast information can be received by the OFDM-based LPR through different carrying of the covering OFDM sequence. Similar to the description in section 1.2.3, carrying the broadcast information through the covering OFDM sequence can include:

[0623] The OFDM sequence covered by the on signal includes a plurality of possible candidate sequences, and the broadcast information is carried through the different sequences;

[0624] Different on symbols cover different OFDM sequences, and the broadcast information is carried through the combination of different sequences;

[0625] The OFDM sequence covered by one or more on signals is a complete covering OFDM sequence, and the broadcast information is carried through the different sequences;

[0626] Further, the broadcast information can be jointly carried by the OOK signal and the covered OFDM sequence. For example, the OOK signal carries part of the broadcast information, and the covered OFDM sequence carries another part of the broadcast information. The UE detects the OOK signal based on the OOK-based LPR to obtain the broadcast information carried by the OOK signal, and the UE detects the OFDM sequence based on the OFDM-based LPR to obtain the broadcast information carried by the covered OFDM sequence. The UE can also use the OFDM-based LPR to obtain the demodulation result of the OOK signal in the process of correlating the covered OFDM sequence according to the correlation result, so as to obtain the broadcast information carried by the OOK signal.

[0627] The broadcast information can include an index corresponding to a synchronization signal or a broadcast channel, such as a synchronization signal block index in NR, and can include subcarrier spacing information, control channel resource information, cell access control information, system frame number information, auxiliary search information, and the like.

[0628] System information

[0629] In the related art, the SIB1 information in the system information is obtained through the broadcast information to obtain the control channel resource information, the PDCCH is detected through the control channel resource information, and the SIB1 is obtained through the scheduling of the PDCCH.

[0630] In the embodiments of the present application, the system information can also be carried by the above-mentioned method, including the OOK signal, the covered OFDM sequence, and the joint carrying of the two. The specific process will not be repeated. It should be noted that the number of bits of the effective SIB1 information is relatively large, and it is not an efficient way to carry it through the OOK signal or the covered OFDM sequence. Therefore, the SIB1 can be further simplified, or the necessary system information block can be newly defined to reduce the size of the system information, so as to be suitable for being transmitted by the above-mentioned method, to realize that the UE receives the system information through the LPR and realizes low power consumption.

[0631] The OOK sequence or the OFDM sequence provided in the embodiments of the present application is exemplified by the M sequence or the Gold sequence, and the present application is not limited thereto, such as the following sequences:

[0632] ZC sequence (ZC sequence);

[0633] Chirp sequence (Chirp sequence);

[0634] Fourier transform (FT) / fast Fourier transform (FFT) sequence;

[0635] Golay sequence (Golay sequence);

[0636] Kasami sequence

[0637] Low density sequence.

[0638] In the embodiments of the present application, the design combination of PSS and SSS includes:

[0639] PSS: OOK modulation, SSS: OOK modulation.

[0640] PSS or SSS has or does not have overlaid OFDM sequence; wherein, on signal overlaid OFDM sequence, applicable to on symbol of PSS and or SSS; fixed overlaid OFDM sequence, or variable overlaid OFDM sequence.

[0641] PSS: OOK modulation, SSS: OFDM modulation.

[0642] PSS: has or does not have overlaid OFDM sequence; wherein, fixed overlaid OFDM sequence, or variable overlaid OFDM sequence.

[0643] SSS: OFDM modulated SSS, demodulated by LPR through time domain correlation method, or demodulated by MR through time domain or frequency domain correlation method.

[0644] The information for determining the physical cell ID is carried by PSS and SSS, such as and may include:

[0645] 1. When PSS or SSS is modulated by OOK, it is carried by OOK sequence, at this time, the overlaid OFDM sequence can be a fixed sequence, or the way of generating on signal is not defined; information bits can also be carried by OOK signal, and the information for determining the physical cell ID is carried by the carried information bits, instead of being carried by OOK sequence.

[0646] 2. When PSS or SSS is modulated by OOK, it is carried by overlaid OFDM sequence, at this time, OOK can be a fixed sequence.

[0647] 3. When overlaid OFDM sequence is used, the information for determining the physical cell ID is carried by OOK sequence and overlaid OFDM sequence together; information bits can also be carried by OOK signal, and the information for determining the physical cell ID is carried by the carried information bits, instead of being carried by OOK sequence.

[0648] 4. When OFDM modulation is used, the information bits are carried in a similar way as in the prior art, i.e. by an OFDM sequence.

[0649] In the embodiments of the present application, the carrying manners of the broadcast information and the system information include:

[0650] Manner one, carrying information bits by an OOK signal;

[0651] Manner two, carrying information bits by an overlaid OFDM sequence;

[0652] Manner three, carrying information bits by an OOK signal and an overlaid OFDM sequence.

[0653] In the embodiments of the present application, in addition to the signals used in the initial access process adopting the present scheme to realize low-power-consumption detection, the low-power-consumption detection can also be applied to other processes. For example, in the RRM and RLM measurement processes, or in the beam management process, the corresponding signals such as SSB and CSI-RS are detected in a low-power-consumption manner. At this time, the waveforms of the SSB and the CSI-RS can adopt the scheme designed in the present application, such as OOK modulation, overlaid OFDM sequence, etc., so as to realize low power consumption of the UE in these processes.

[0654] The preferred embodiments of the present application are described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details in the above-described embodiments. Within the technical concept of the present application, various simple modifications can be made to the technical scheme of the present application, and these simple modifications all belong to the protection scope of the present application. For example, in the above-described specific embodiments, various specific technical features are described, and in the case of no contradiction, any suitable manner can be used to combine the technical features. In order to avoid unnecessary repetition, the present application does not further describe various possible combination manners. For example, the various different embodiments of the present application can also be combined in any manner, as long as it does not deviate from the idea of the present application, and it should also be considered as the disclosed content of the present application. For example, in the case of no conflict, each embodiment described in the present application and / or the technical features in each embodiment can be combined with any prior art, and the technical scheme obtained after the combination should also fall within the protection scope of the present application.

[0655] It should also be understood that the size of the sequence number of the above-mentioned processes does not mean the order of execution in various method embodiments of the present application, and the execution order of the processes should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. In addition, in the embodiments of the present application, the terms "downlink", "uplink" and "sidelink" are used to represent the transmission direction of signals or data, wherein "downlink" is used to represent the first direction of the transmission direction of signals or data from the station to the user equipment of the cell, "uplink" is used to represent the second direction of the transmission direction of signals or data from the user equipment of the cell to the station, and "sidelink" is used to represent the third direction of the transmission direction of signals or data from user equipment 1 to user equipment 2. For example, "downlink signal" represents that the transmission direction of the signal is the first direction. In addition, in the embodiments of the present application, the term "and / or" is only used to describe the association relationship of the associated objects, and indicates that there can be three relationships. Specifically, A and / or B can represent three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0656] FIG. 19 is a schematic diagram of the structure of a terminal device according to an embodiment of the present application. As shown in FIG. 19, the terminal device 1900 includes:

[0657] The first communication unit 1901 is configured to receive a synchronization signal through the first receiver.

[0658] In some embodiments, the first receiver is a low-power receiver (LPR).

[0659] In some embodiments, the terminal device further includes a second receiver.

[0660] In some embodiments, the second receiver is a main receiver (MR).

[0661] In some embodiments, the first receiver supports one or more demodulation modes.

[0662] In some embodiments, the one or more demodulation modes include a first demodulation mode, and the first demodulation mode includes one or more of:

[0663] on-off keying (OOK), frequency-shift keying (FSK), phase-shift keying (PSK), and quadrature amplitude modulation (QAM).

[0664] In some embodiments, the one or more demodulation modes further include a second demodulation mode, and the second demodulation mode includes orthogonal frequency-division multiplexing (OFDM).

[0665] In some embodiments, the first communication unit 1901 is further configured to receive, by the first receiver, a primary synchronization signal (PSS) included in the synchronization signal.

[0666] In some embodiments, the first communication unit 1901 is further configured to receive, by the first receiver, the PSS, and demodulate, by the first receiver, the PSS.

[0667] In some embodiments, the first communication unit 1901 is further configured to demodulate, by the first receiver, the PSS using a first demodulation manner or a second demodulation manner.

[0668] In some embodiments, a signal waveform of the PSS is an on-off signal, and a value of the on-off signal on each symbol is on or off.

[0669] In some embodiments, the PSS is an on-off signal generated based on a target first sequence.

[0670] In some embodiments, the target first sequence is one of a first number of first sequences, and the first number is a positive integer greater than or equal to 1.

[0671] In some embodiments, the PSS is an on-off signal after OOK modulation of the target first sequence.

[0672] In some embodiments, the first communication unit 1901 is further configured to demodulate, by the first receiver, the PSS using OOK to obtain the target first sequence.

[0673] In some embodiments, an on symbol of the PSS is used to carry a signal after OFDM modulation of a target second sequence.

[0674] In some embodiments, the target second sequence is one of a second number of second sequences, and the second number is a positive integer greater than or equal to 1.

[0675] In some embodiments, the on symbol and the off symbol of the PSS are associated with the target first sequence.

[0676] In some embodiments, the first communication unit 1901 is further configured to demodulate, by the first receiver, the PSS using OOK to obtain the target first sequence.

[0677] In some embodiments, the first communication unit 1901 is further configured to demodulate, by the first receiver, the PSS using OFDM to obtain the target second sequence and / or the target first sequence.

[0678] In some embodiments,

[0679] The target second sequences corresponding to the at least two on symbols in the PSS are the same; or

[0680] The target second sequences corresponding to the at least two on symbols in the PSS are different.

[0681] In some embodiments, the target second sequences corresponding to the at least two on symbols in the PSS are different, including:

[0682] The at least two on symbols correspond to different parts of one target second sequence; or

[0683] The at least two on symbols correspond to different target second sequences respectively.

[0684] In some embodiments, the target first sequence and / or the target second sequence are used to carry first information of the PSS.

[0685] SSS

[0686] In some embodiments, the first communication unit 1901 is further configured to receive, by the first receiver, a secondary synchronization signal (SSS) included in the synchronization signal.

[0687] In some embodiments, the first communication unit 1901 is further configured to receive, by the first receiver, the SSS, and the terminal device demodulates the SSS by the first receiver.

[0688] In some embodiments, the first communication unit 1901 is further configured to demodulate, by the first receiver, the SSS using a first demodulation manner or a second demodulation manner.

[0689] In some embodiments, a signal waveform of the SSS is an on-off signal, and a value of the on-off signal on each symbol is on or off.

[0690] In some embodiments, the SSS is an on-off signal generated based on a target third sequence.

[0691] In some embodiments, the SSS is a plurality of on-off signals, each of the on-off signals is generated based on a target third sequence, and target third sequences corresponding to each of the on-off signals are the same, or target third sequences corresponding to at least two of the on-off signals are different.

[0692] In some embodiments, the target third sequence is one of a third number of third sequences, and the third number is a positive integer greater than or equal to 1.

[0693] In some embodiments, the SSS is an on-off keying (OOK) modulated signal of the target third sequence.

[0694] In some embodiments, the first communication unit 1901 is further configured to obtain the target third sequence by OOK demodulating the SSS via the first receiver.

[0695] In some embodiments, an on symbol of the SSS carries a signal of the target fourth sequence modulated by OFDM.

[0696] In some embodiments, the target fourth sequence is one of a fourth number of fourth sequences, and the fourth number is a positive integer greater than or equal to 1.

[0697] In some embodiments, the on symbol and the off symbol of the SSS are associated with the target third sequence.

[0698] In some embodiments, the first communication unit 1901 is further configured to obtain the target third sequence by OOK demodulating the SSS via the first receiver.

[0699] In some embodiments, the first communication unit 1901 is further configured to obtain the target fourth sequence and / or the target third sequence by OFDM demodulating the SSS via the first receiver.

[0700] In some embodiments,

[0701] at least two on symbols of the SSS correspond to the same target fourth sequence; or

[0702] at least two on symbols of the SSS correspond to different target fourth sequences.

[0703] In some embodiments, the at least two on symbols of the SSS correspond to different target fourth sequences, including:

[0704] the at least two on symbols correspond to different parts of one target fourth sequence; or

[0705] the at least two on symbols correspond to different target fourth sequences, respectively.

[0706] In some embodiments, the target third sequence and / or the target fourth sequence is used to carry second information of the SSS.

[0707] In some embodiments, the first communication unit 1901 is further configured to receive, via the second receiver, the SSS included in the synchronization signal.

[0708] In some embodiments, the synchronization signal is used for one or more of the following functions: cell search, synchronization, measurement.

[0709] In some embodiments, the functions of the synchronization signal are realized by the first information of the PSS and / or the second information of the SSS.

[0710] In some embodiments, the synchronization signal is used for carrying a cell identity.

[0711] In some embodiments, the cell identity is carried in the first information of the PSS, or in the second information of the SSS, or jointly carried by the first information of the PSS and the second information of the SSS.

[0712] In some embodiments, the first communication unit 1901 is further configured to receive, by the first receiver, a physical broadcast channel (PBCH) included in the synchronization signal.

[0713] In some embodiments, the first communication unit 1901 is further configured to receive, by the first receiver, the PBCH, and the terminal device demodulates the PBCH by the first receiver.

[0714] In some embodiments, the first communication unit 1901 is further configured to demodulate, by the first receiver, the PBCH using a first demodulation manner or a second demodulation manner.

[0715] In some embodiments, a signal waveform of the PBCH is an On-Off signal, and a value of the On-Off signal at each symbol is on or off.

[0716] In some embodiments, the PBCH is an On-Off signal generated based on a target fifth sequence.

[0717] In some embodiments, the PBCH is a plurality of On-Off signals, each of the On-Off signals is generated based on a target fifth sequence, and the target fifth sequence corresponding to each of the On-Off signals is the same, or the target fifth sequences corresponding to at least two of the On-Off signals are different.

[0718] In some embodiments, the target fifth sequence is one of a fifth number of fifth sequences, and the fifth number is a positive integer greater than or equal to 1.

[0719] In some embodiments, the PBCH is an On-Off signal after OOK modulation of the target fifth sequence.

[0720] In some embodiments, the first communication unit 1901 is further configured to obtain the target fifth sequence by demodulating the PBCH using OOK via the first receiver.

[0721] In some embodiments, the on symbols of the PBCH are used to carry signals of OFDM modulation of a target sixth sequence.

[0722] In some embodiments, the target sixth sequence is one of a sixth number of target sixth sequences, and the sixth number is a positive integer greater than or equal to 1.

[0723] In some embodiments, the on symbols and the off symbols of the PBCH are associated with the target fifth sequence.

[0724] In some embodiments, the first communication unit 1901 is further configured to obtain the target fifth sequence by demodulating the PBCH using OOK via the first receiver.

[0725] In some embodiments, the first communication unit 1901 is further configured to obtain the target sixth sequence and / or the target fifth sequence by demodulating the PBCH using OFDM via the first receiver.

[0726] In some embodiments,

[0727] the target sixth sequences corresponding to at least two on symbols in the PBCH are the same; or

[0728] the target sixth sequences corresponding to at least two on symbols in the PBCH are different.

[0729] In some embodiments, the target sixth sequences corresponding to at least two on symbols in the PBCH are different, including:

[0730] the at least two on symbols correspond to different parts of one target sixth sequence; or

[0731] the at least two on symbols correspond to different target sixth sequences, respectively.

[0732] In some embodiments, the target fifth sequence and / or the target sixth sequence is used to carry broadcast information of the PBCH.

[0733] In some embodiments, the first communication unit 1901 is further configured to receive the PBCH included in the synchronization signal via the second receiver.

[0734] In some embodiments, the first communication unit 1901 is further configured to receive a system message according to the synchronization signal.

[0735] In some embodiments, the first communication unit 1901 is further configured to receive the system message according to the PBCH in the synchronization signal; wherein the PBCH is used to indicate control resource information, and the control resource information is used for receiving a physical downlink control channel (PDCCH) for scheduling the system message.

[0736] In some embodiments, the first communication unit 1901 is further configured to receive the system message according to the synchronization signal through the first receiver.

[0737] In some embodiments, the first communication unit 1901 is further configured to receive the system message through the first receiver, and the terminal device demodulates the system message through the first receiver.

[0738] In some embodiments, the first communication unit 1901 is further configured to demodulate the system message through the first receiver using a first demodulation manner or a second demodulation manner.

[0739] In some embodiments, a signal waveform of the system message is an on-off signal, and a value of the on-off signal on each symbol is on or off.

[0740] In some embodiments, the system message is an on-off signal generated based on a target seventh sequence.

[0741] In some embodiments, the system message is an on-off signal after OOK modulation of the target seventh sequence.

[0742] In some embodiments, the first communication unit 1901 is further configured to demodulate the system message through the first receiver using OOK to obtain the target seventh sequence.

[0743] In some embodiments, an on symbol of the system message is used to carry a signal after OFDM modulation of a target eighth sequence.

[0744] In some embodiments, the first communication unit 1901 is further configured to demodulate the system message through the first receiver using OOK to obtain the target seventh sequence.

[0745] In some embodiments, the first communication unit 1901 is further configured to demodulate the system message through the first receiver using OFDM to obtain the target eighth sequence and / or the target seventh sequence.

[0746] In some embodiments, the target seventh sequence and / or the target eighth sequence are used to carry system information of the system message.

[0747] In some embodiments, the first communication unit 1901 is further configured to receive, by the second receiver, the system message according to the synchronization signal.

[0748] The first communication unit in the terminal device can be implemented by a transceiver in the terminal device. It can be understood that the transceiver can include the first receiver, and the transceiver can further include a second receiver.

[0749] FIG. 20 is a structural component diagram of a network device according to an embodiment of the present application. As shown in FIG. 20, the network device 2000 includes:

[0750] The second communication unit 2001 is configured to send a synchronization signal, the synchronization signal being used for receiving by a first receiver included in a terminal device.

[0751] In some embodiments, the first receiver is a low-power receiver (LPR).

[0752] In some embodiments, the second communication unit 2001 is further configured to send a PSS included in the synchronization signal, the PSS being used for receiving by the first receiver by the terminal device.

[0753] In some embodiments, the second communication unit 2001 is further configured to modulate the PSS and send the PSS.

[0754] In some embodiments, a signal waveform of the PSS is a switching signal, and a value of the switching signal on each symbol is on or off.

[0755] In some embodiments, the second communication unit 2001 is further configured to modulate based on a target first sequence to obtain the PSS.

[0756] In some embodiments, the second communication unit 2001 is further configured to perform OOK modulation on the target first sequence to obtain the PSS.

[0757] In some embodiments, the PSS is used for the terminal device to obtain the target first sequence by using OOK demodulation by the first receiver.

[0758] In some embodiments, the second communication unit 2001 is further configured to perform OFDM modulation on a target second sequence, and carry a signal of the target second sequence after the OFDM modulation on an on symbol of the PSS.

[0759] In some embodiments, the on symbol and the off symbol of the PSS are associated with the target first sequence.

[0760] In some embodiments, the PSS is used by the terminal device to obtain the target first sequence by OOK demodulation through the first receiver; or,

[0761] The PSS is used by the terminal device to obtain the target second sequence and / or the target first sequence by OFDM demodulation through the first receiver.

[0762] In some embodiments, at least two on symbols in the PSS correspond to the same target second sequence; or,

[0763] At least two on symbols in the PSS correspond to different target second sequences.

[0764] In some embodiments, at least two on symbols in the PSS correspond to different target second sequences, including:

[0765] The at least two on symbols correspond to different parts of a target second sequence; or,

[0766] The at least two on symbols correspond to different target second sequences respectively.

[0767] In some embodiments, the target first sequence and / or the target second sequence is used to carry first information of the PSS.

[0768] In some embodiments, the second communication unit 2001 is further configured to send a secondary synchronization signal SSS included in the synchronization signal, and the SSS is used by the terminal device to receive through the first receiver.

[0769] In some embodiments, the second communication unit 2001 is further configured to modulate the SSS and send the SSS.

[0770] In some embodiments, a signal waveform of the SSS is an on-off signal, and a value of the on-off signal at each symbol is on or off.

[0771] In some embodiments, the second communication unit 2001 is further configured to modulate based on the target third sequence to obtain the SSS.

[0772] In some embodiments, the SSS is a plurality of on-off signals, each of the on-off signals is generated based on a target third sequence, and each of the on-off signals corresponds to the same target third sequence, or at least two of the on-off signals correspond to different target third sequences.

[0773] In some embodiments, the second communication unit 2001 is further configured to perform OOK modulation on the target third sequence to obtain the SSS.

[0774] In some embodiments, the SSS is configured to be used by the terminal device to perform OOK demodulation by the first receiver to obtain the target third sequence.

[0775] In some embodiments, the second communication unit 2001 is further configured to perform OFDM modulation on a target fourth sequence, and carry a signal of the target fourth sequence after OFDM modulation on an on symbol of the SSS.

[0776] In some embodiments, the on symbol and the off symbol of the SSS are associated with the target fourth sequence.

[0777] In some embodiments, the SSS is configured to be used by the terminal device to perform OOK demodulation by the first receiver to obtain the target third sequence; or,

[0778] The SSS is configured to be used by the terminal device to perform OFDM demodulation by the first receiver to obtain the target fourth sequence and / or the target third sequence.

[0779] In some embodiments,

[0780] The target fourth sequences corresponding to at least two on symbols in the SSS are the same; or,

[0781] The target fourth sequences corresponding to at least two on symbols in the SSS are different.

[0782] In some embodiments, the target fourth sequences corresponding to at least two on symbols in the SSS are different, including:

[0783] The at least two on symbols correspond to different parts of one target fourth sequence; or,

[0784] The at least two on symbols correspond to different target fourth sequences respectively.

[0785] In some embodiments, the target third sequence and / or the target fourth sequence is used to carry second information of the SSS.

[0786] In some embodiments, the second communication unit 2001 is further configured to send the SSS included in the synchronization signal, and the SSS is configured to be received by the terminal device through the second receiver.

[0787] In some embodiments, the synchronization signal is used to implement one or more of the following functions: cell search, synchronization, measurement.

[0788] In some embodiments, the functions of the synchronization signal are realized by the first information of the PSS and / or the second information of the SSS.

[0789] In some embodiments, the synchronization signal is used to carry a cell identity.

[0790] In some embodiments, the cell identity is carried in the first information of the PSS, or in the second information of the SSS, or jointly carried by the first information of the PSS and the second information of the SSS.

[0791] In some embodiments, the second communication unit 2001 is further configured to send a physical broadcast channel (PBCH) included in the synchronization signal, the PBCH being used for the terminal device to receive by the first receiver.

[0792] In some embodiments, the second communication unit 2001 is further configured to modulate the PBCH and send the PBCH.

[0793] In some embodiments, a signal waveform of the PBCH is an On-Off signal, the On-Off signal having a value of on or off at each symbol.

[0794] In some embodiments, the second communication unit 2001 is further configured to obtain the PBCH based on a target fifth sequence.

[0795] In some embodiments, the PBCH is a plurality of On-Off signals, each of the On-Off signals being generated based on a target fifth sequence, the target fifth sequence corresponding to each of the On-Off signals being the same, or the target fifth sequence corresponding to at least two of the On-Off signals being different.

[0796] In some embodiments, the second communication unit 2001 is further configured to perform OOK modulation on the target fifth sequence to obtain the PBCH.

[0797] In some embodiments, the PBCH is used for the terminal device to perform OOK demodulation by the first receiver to obtain the target fifth sequence.

[0798] In some embodiments, the second communication unit 2001 is further configured to perform OFDM modulation on a target sixth sequence, and carry a signal of the target sixth sequence after OFDM modulation on an on symbol of the PBCH.

[0799] In some embodiments, the on symbol and the off symbol of the PBCH are associated with the target fifth sequence.

[0800] In some embodiments, the PBCH is configured to be demodulated by the first receiver of the terminal device using OOK demodulation to obtain the target fifth sequence; or,

[0801] The PBCH is configured to be demodulated by the first receiver of the terminal device using OFDM demodulation to obtain the target sixth sequence and / or the target fifth sequence.

[0802] In some embodiments, the target sixth sequences corresponding to at least two on symbols in the PBCH are the same; or,

[0803] The target sixth sequences corresponding to at least two on symbols in the PBCH are different.

[0804] In some embodiments, the target sixth sequences corresponding to at least two on symbols in the PBCH are different, including:

[0805] The at least two on symbols correspond to different parts of a target sixth sequence; or,

[0806] The at least two on symbols correspond to different target sixth sequences respectively.

[0807] In some embodiments, the target fifth sequence and / or the target sixth sequence is used to carry broadcast information of the PBCH.

[0808] In some embodiments, the second communication unit 2001 is further configured to send the PBCH included in the synchronization signal, and the PBCH is configured to be received by the terminal device through the second receiver.

[0809] In some embodiments, the second communication unit 2001 is further configured to send a system message according to the synchronization signal.

[0810] In some embodiments, the second communication unit 2001 is further configured to send the system message according to the PBCH in the synchronization signal; wherein the PBCH is configured to indicate control resource information, the control resource information is used for receiving a physical downlink control channel, and the PDCCH is used for scheduling the system message.

[0811] In some embodiments, the system message is configured to be received by the terminal device through the first receiver according to the synchronization signal.

[0812] In some embodiments, the second communication unit 2001 is further configured to modulate the system message and send the system message.

[0813] In some embodiments, the signal waveform of the system message is an On-Off signal, and the On-Off signal has a value of on or off in each symbol.

[0814] In some embodiments, the second communication unit 2001 is further configured to obtain the system message based on modulation of the target seventh sequence.

[0815] 129. The method of claim 128, wherein the network device obtains the system message based on modulation of the target seventh sequence, comprising:

[0816] The network device performs OOK modulation on the target seventh sequence to obtain the system message.

[0817] In some embodiments, the system message is used by the terminal device to obtain the target seventh sequence through OOK demodulation by the first receiver.

[0818] In some embodiments, the second communication unit 2001 is further configured to modulate the target eighth sequence and carry a signal after OFDM modulation of the target eighth sequence on the on symbol of the system message.

[0819] In some embodiments, the system message is used by the terminal device to obtain the target seventh sequence through OOK demodulation by the first receiver; or,

[0820] The system message is used by the terminal device to obtain the target eighth sequence and / or the target seventh sequence through OFDM demodulation by the first receiver.

[0821] In some embodiments, the target seventh sequence and / or the target eighth sequence are used to carry system information of the system message.

[0822] In some embodiments, the system message is used by the terminal device to receive through the second receiver according to the synchronization signal.

[0823] The second communication unit in the network device can be implemented by a transceiver in the network device.

[0824] Those skilled in the art should understand that the above description of the terminal device or the network device of the embodiments of the present application can be understood with reference to the description of the wireless communication method of the embodiments of the present application.

[0825] FIG. 21 is a schematic structural diagram of a communication device 2100 provided in an embodiment of the present application. The communication device can be a terminal device or a network device. The communication device 2100 shown in FIG. 21 includes a processor 2110. The processor 2110 can invoke and run a computer program from a memory to implement the methods in the embodiments of the present application.

[0826] Optionally, as shown in FIG. 21, the communication device 2100 can further include a memory 2120. The processor 2110 can invoke and run a computer program from the memory 2120 to implement the methods in the embodiments of the present application.

[0827] The memory 2120 can be a separate device independent of the processor 2110, or can be integrated in the processor 2110.

[0828] Optionally, as shown in FIG. 21, the communication device 2100 can further include a transceiver 2130. The processor 2110 can control the transceiver 2130 to communicate with other devices, specifically, to send information or data to other devices, or to receive information or data sent by other devices.

[0829] The transceiver 2130 can include a transmitter and a receiver. The transceiver 2130 can further include an antenna, and the number of antennas can be one or more.

[0830] Optionally, the communication device 2100 can be a network device in the embodiments of the present application, and the communication device 2100 can implement the corresponding processes in the methods of the embodiments of the present application implemented by the network device. For brevity, details are not described herein.

[0831] Optionally, the communication device 2100 can be a mobile terminal / terminal device in the embodiments of the present application, and the communication device 2100 can implement the corresponding processes in the methods of the embodiments of the present application implemented by the mobile terminal / terminal device. For brevity, details are not described herein.

[0832] FIG. 22 is a schematic structural diagram of a chip in the embodiments of the present application. The chip 2200 shown in FIG. 22 includes a processor 2210. The processor 2210 can invoke and run a computer program from a memory to implement the methods in the embodiments of the present application.

[0833] Optionally, as shown in FIG. 22, the chip 2200 can further include a memory 2220. The processor 2210 can invoke and run a computer program from the memory 2220 to implement the methods in the embodiments of the present application.

[0834] The memory 2220 can be a separate device independent of the processor 2210, or can be integrated in the processor 2210.

[0835] Optionally, the chip 2200 can further include an input interface 2230. The processor 2210 can control the input interface 2230 to communicate with other devices or chips, and specifically, can acquire information or data sent by other devices or chips.

[0836] Optionally, the chip 2200 can further include an output interface 2240. The processor 2210 can control the output interface 2240 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.

[0837] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes realized by the network device in the methods of the embodiments of the present application. For brevity, details are not described herein.

[0838] Optionally, the chip can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the chip can implement the corresponding processes realized by the mobile terminal / terminal device in the methods of the embodiments of the present application. For brevity, details are not described herein.

[0839] It should be understood that the chip mentioned in the embodiments of the present application can also be referred to as a system chip, a system chip, a chip system or a system on chip, etc.

[0840] FIG. 23 is a schematic block diagram of a communication system 2300 according to an embodiment of the present application. As shown in FIG. 23, the communication system 2300 includes a terminal device 2310 and a network device 2320.

[0841] The terminal device 2310 can be used to implement the corresponding functions realized by the terminal device in the above methods, and the network device 2320 can be used to implement the corresponding functions realized by the network device in the above methods. For brevity, details are not described herein.

[0842] It should be understood that the processor of the embodiments of the present application can be an integrated circuit chip with a processing capability of signals. In the implementation process, each step of the method embodiments described above can be completed by the integrated logic circuit of hardware in the processor or the instructions in the form of software. The processor described above can be a general processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, a discrete gate or transistor logic device, a discrete hardware component. The disclosed methods, steps and logic block diagrams in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as a hardware coding processor for execution, or a combination of hardware and software modules in the coding processor for execution. The software module can be located in a random access memory, a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register or other mature storage medium in the art. The storage medium is located in the storage, and the processor reads the information in the storage, and combines the hardware to complete the steps of the above method.

[0843] It is to be understood that the memory in the embodiments of the present application can be a volatile memory or a nonvolatile memory, or can include both volatile and nonvolatile memory. Among them, the nonvolatile memory can be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or a flash memory. The volatile memory can be a random access memory (Random Access Memory, RAM) used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM). It should be noted that the memory of the system and method described herein is intended to include, but not limited to, these and any other suitable types of memory.

[0844] It should be understood that the above-mentioned memory is exemplary but not limiting, for example, the memory in the embodiments of the present application can also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and the like. That is, the memory in the embodiments of the present application is intended to include, but not limited to, these and any other suitable types of memory.

[0845] The embodiment of the present application further provides a computer readable storage medium for storing the computer program.

[0846] Optionally, the computer readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program makes the computer execute the corresponding process realized by the network device in the various methods of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0847] Optionally, the computer readable storage medium can be applied to the mobile terminal / terminal device in the embodiment of the present application, and the computer program makes the computer execute the corresponding process realized by the mobile terminal / terminal device in the various methods of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0848] The embodiment of the present application further provides a computer program product comprising computer program instructions.

[0849] Optionally, the computer program product can be applied to the network device in the embodiment of the present application, and the computer program instructions make the computer execute the corresponding process realized by the network device in the various methods of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0850] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiment of the present application, and the computer program instructions make the computer execute the corresponding process realized by the mobile terminal / terminal device in the various methods of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0851] The embodiment of the present application further provides a computer program.

[0852] Optionally, the computer program can be applied to the network device in the embodiment of the present application, and when the computer program runs on the computer, makes the computer execute the corresponding process realized by the network device in the various methods of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0853] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiment of the present application, and when the computer program runs on the computer, makes the computer execute the corresponding process realized by the mobile terminal / terminal device in the various methods of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0854] Those skilled in the art can clearly understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0855] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0856] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the above-described device embodiments are merely schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0857] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0858] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically independently, or two or more units can be integrated into one unit.

[0859] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application or the parts of the technical solutions that essentially contribute to the prior art or the parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0860] 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 can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A wireless communication method applied to a terminal device, wherein, The terminal device includes a first receiver, and the method includes: The terminal device receives a synchronization signal through the first receiver.

2. The method according to claim 1, wherein, The first receiver is a low-power receiver (LPR).

3. The method according to claim 1 or 2, wherein, The terminal device also includes a second receiver.

4. The method according to claim 3, wherein, The second receiver is the main receiver (MR).

5. The method according to any one of claims 1 to 4, wherein, The first receiver supports one or more demodulation methods.

6. The method according to claim 5, wherein, The one or more demodulation methods include a first demodulation method, which includes one or more of the following: On / off keying (OOK), frequency shift keying (FSK), phase shift keying (PSK), and quadrature amplitude modulation (QAM).

7. The method according to claim 6, wherein, The one or more demodulation methods further include a second demodulation method, which includes: Orthogonal Frequency Division Multiplexing (OFDM).

8. The method according to any one of claims 1 to 7, wherein, The synchronization signal includes a primary synchronization signal (PSS), and the terminal device receives the synchronization signal through the first receiver, including: The terminal device receives the PSS through the first receiver.

9. The method according to claim 8, wherein, The terminal device receives the PSS via the first receiver, including: The terminal device receives the PSS through the first receiver, and the terminal device demodulates the PSS through the first receiver.

10. The method according to claim 9, wherein, The terminal device demodulates the PSS via the first receiver, including: The terminal device demodulates the PSS through the first receiver using either the first demodulation method or the second demodulation method.

11. The method according to claim 10, wherein, The signal waveform of the PSS is a switching signal, and the value of the switching signal on each symbol is either on or off.

12. The method according to claim 11, wherein, The PSS is a switching signal generated based on the target first sequence.

13. The method according to claim 12, wherein, The target first sequence is one of a first number of first sequences, where the first number is a positive integer greater than or equal to 1.

14. The method according to claim 12 or 13, wherein, The PSS is the switching signal of the target first sequence after OOK modulation.

15. The method according to claim 14, wherein, The terminal device, through the first receiver, demodulates the PSS using either a first demodulation method or a second demodulation method, including: The terminal device obtains the target first sequence by demodulating the PSS using OOK through the first receiver.

16. The method according to any one of claims 12 to 13, wherein, The open symbol of the PSS is used to carry the signal of the target second sequence after OFDM modulation.

17. The method according to claim 16, wherein, The target second sequence is one of a second number of second sequences, where the second number is a positive integer greater than or equal to 1.

18. The method according to claim 16 or 17, wherein, The on and off symbols of the PSS are associated with the target first sequence.

19. The method according to any one of claims 16 to 18, wherein, The terminal device, through the first receiver, demodulates the PSS using either a first demodulation method or a second demodulation method, including: The terminal device obtains the target first sequence by demodulating the PSS using OOK through the first receiver.

20. The method according to claim 16 or 18, wherein, The terminal device, through the first receiver, demodulates the PSS using either a first demodulation method or a second demodulation method, including: The terminal device uses the first receiver to demodulate the PSS using OFDM to obtain the target second sequence and / or the target first sequence.

21. The method according to any one of claims 16 to 20, wherein, In the PSS, at least two open symbols correspond to the same target second sequence; or, At least two open symbols in the PSS correspond to different target second sequences.

22. The method according to claim 21, wherein, The target second sequence corresponding to at least two open symbols in the PSS is different, including: The at least two open symbols correspond to different parts of a target second sequence; or, The at least two open symbols each correspond to a different target second sequence.

23. The method according to any one of claims 16 to 22, wherein, The first target sequence and / or the second target sequence are used to carry the first information of the PSS.

24. The method according to any one of claims 8 to 23, wherein, The synchronization signal includes an auxiliary synchronization signal SSS, and the terminal device receives the synchronization signal through the first receiver, including: The terminal device receives the SSS through the first receiver.

25. The method according to claim 24, wherein, The terminal device receives the SSS via the first receiver, including: The terminal device receives the SSS through the first receiver, and the terminal device demodulates the SSS through the first receiver.

26. The method according to claim 25, wherein, The terminal device demodulates the SSS via the first receiver, including: The terminal device demodulates the SSS using the first receiver and employs either the first demodulation method or the second demodulation method.

27. The method according to claim 26, wherein, The signal waveform of the SSS is a switching signal, and the value of the switching signal on each symbol is either on or off.

28. The method according to claim 27, wherein, The SSS is a switching signal generated based on the target third sequence.

29. The method according to claim 28, wherein, The SSS is a plurality of switching signals, each of which is generated based on a target third sequence. The target third sequence corresponding to each of the switching signals is the same, or at least two of the switching signals correspond to different target third sequences.

30. The method according to claim 28 or 29, wherein, The target third sequence is one of a third number of third sequences, where the third number is a positive integer greater than or equal to 1.

31. The method according to any one of claims 28 to 30, wherein, The SSS is the switching signal of the target third sequence after OOK modulation.

32. The method according to claim 31, wherein, The terminal device, through the first receiver, demodulates the SSS using either a first demodulation method or a second demodulation method, including: The terminal device obtains the target third sequence by using the first receiver and employing OOK to demodulate the SSS.

33. The method according to any one of claims 28 to 30, wherein, The open symbol of the SSS is used to carry the signal of the target fourth sequence after OFDM modulation.

34. The method according to claim 33, wherein, The target fourth sequence is one of a fourth number of fourth sequences, where the fourth number is a positive integer greater than or equal to 1.

35. The method according to claim 33 or 34, wherein, The on and off symbols of the SSS are associated with the target third sequence.

36. The method according to any one of claims 33 to 35, wherein, The terminal device, through the first receiver, demodulates the SSS using either a first demodulation method or a second demodulation method, including: The terminal device obtains the target third sequence by using the first receiver and employing OOK to demodulate the SSS.

37. The method according to any one of claims 33 to 35, wherein, The terminal device, through the first receiver, demodulates the SSS using either a first demodulation method or a second demodulation method, including: The terminal device uses the first receiver to demodulate the SSS using OFDM to obtain the target fourth sequence and / or the target third sequence.

38. The method according to any one of claims 33 to 37, wherein, In the SSS, at least two open symbols correspond to the same target fourth sequence; or, At least two open symbols in the SSS correspond to different target fourth sequences.

39. The method according to claim 38, wherein, The target fourth sequence corresponding to at least two open symbols in the SSS is different, including: The at least two open symbols correspond to different parts of a target fourth sequence; or, The at least two open symbols each correspond to a different target fourth sequence.

40. The method according to any one of claims 33 to 39, wherein, The target third sequence and / or the target fourth sequence are used to carry the second information of the SSS.

41. The method according to any one of claims 8 to 23, wherein, The synchronization signal includes SSS, and the method further includes: The terminal device receives SSS through a second receiver.

42. The method according to any one of claims 24 to 41, wherein, The synchronization signal is used to perform one or more of the following functions: cell search, synchronization, and measurement.

43. The method according to claim 42, wherein, The function of the synchronization signal is achieved through the first information of the PSS and / or the second information of the SSS.

44. The method according to claim 43, wherein, The synchronization signal is used to carry the cell identifier.

45. The method according to claim 44, wherein, The cell identifier is carried in the first information of the PSS, or in the second information of the SSS, or carried together by the first information of the PSS and the second information of the SSS.

46. ​​The method according to any one of claims 24 to 45, wherein, The synchronization signal includes the Physical Broadcast Channel (PBCH), and the terminal device receives the synchronization signal through the first receiver, including: The terminal device receives the PBCH through the first receiver.

47. The method according to claim 46, wherein, The terminal device receives the PBCH via the first receiver, including: The terminal device receives the PBCH through the first receiver, and the terminal device demodulates the PBCH through the first receiver.

48. The method according to claim 46, wherein, The terminal device demodulates the PBCH via the first receiver, including: The terminal device demodulates the PBCH using the first receiver and employs either the first demodulation method or the second demodulation method.

49. The method according to claim 48, wherein, The signal waveform of the PBCH is a switching signal, and the value of the switching signal on each symbol is either on or off.

50. The method according to claim 49, wherein, The PBCH is a switching signal generated based on the target fifth sequence.

51. The method according to claim 50, wherein, The PBCH consists of multiple switching signals, each of which is generated based on a target fifth sequence. The target fifth sequence corresponding to each of the switching signals is the same, or at least two of the switching signals correspond to different target fifth sequences.

52. The method according to claim 50 or 51, wherein, The target fifth sequence is one of a fifth number of fifth sequences, where the fifth number is a positive integer greater than or equal to 1.

53. The method according to any one of claims 50 to 52, wherein, The PBCH is the switching signal of the target fifth sequence after OOK modulation.

54. The method according to claim 53, wherein, The terminal device, through the first receiver, demodulates the PBCH using either a first demodulation method or a second demodulation method, including: The terminal device obtains the target fifth sequence by using the first receiver and employing OOK to demodulate the PBCH.

55. The method according to any one of claims 50 to 52, wherein, The open symbol of the PBCH is used to carry the signal of the target sixth sequence after OFDM modulation.

56. The method according to claim 55, wherein, The target sixth sequence is one of a sixth number of sixth sequences, where the sixth number is a positive integer greater than or equal to 1.

57. The method according to claim 55 or 56, wherein, The open and close symbols of the PBCH are associated with the target fifth sequence.

58. The method according to any one of claims 55 to 57, wherein, The terminal device, through the first receiver, demodulates the PBCH using either a first demodulation method or a second demodulation method, including: The terminal device obtains the target fifth sequence by using the first receiver and employing OOK to demodulate the PBCH.

59. The method according to any one of claims 55 to 57, wherein, The terminal device, through the first receiver, demodulates the PBCH using either a first demodulation method or a second demodulation method, including: The terminal device uses the first receiver to demodulate the PBCH using OFDM to obtain the target sixth sequence and / or the target fifth sequence.

60. The method according to any one of claims 55 to 59, wherein, In the PBCH, at least two open symbols correspond to the same target sixth sequence; or, At least two open symbols in the PBCH correspond to different target sixth sequences.

61. The method according to claim 60, wherein, The target sixth sequence corresponding to at least two open symbols in the PBCH is different, including: The at least two open symbols correspond to different parts of a target sixth sequence; or, The at least two open symbols each correspond to a different target sixth sequence.

62. The method according to any one of claims 55 to 61, wherein, The fifth target sequence and / or the sixth target sequence are used to carry the broadcast information of the PBCH.

63. The method according to any one of claims 24 to 45, wherein, The synchronization signal includes PBCH, and the method further includes: The terminal device receives the PBCH through a second receiver.

64. The method according to any one of claims 1 to 63, wherein, The method further includes: The terminal device receives system messages based on the synchronization signal.

65. The method according to any one of claims 64, wherein, The terminal device receives system messages based on the synchronization signal, including: The terminal device receives the system message according to the PBCH in the synchronization signal; wherein the PBCH is used to indicate control resource information, the control resource information is used to receive the physical downlink control channel, and the PDCCH is used to schedule the system message.

66. The method according to claim 64 or 65, wherein, The terminal device receives system messages based on the synchronization signal, including: The terminal device receives the system message through the first receiver based on the synchronization signal.

67. The method according to claim 66, wherein, The terminal device receives the system messages via the first receiver, including: The terminal device receives the system message through the first receiver, and the terminal device demodulates the system message through the first receiver.

68. The method according to claim 67, wherein, The terminal device demodulates the system messages via the first receiver, including: The terminal device demodulates the system messages through the first receiver using either the first demodulation method or the second demodulation method.

69. The method according to claim 68, wherein, The signal waveform of the system message is a switch signal, and the value of the switch signal on each symbol is either on or off.

70. The method according to claim 69, wherein, The system message is a switch signal generated based on the target seventh sequence.

71. The method according to claim 70, wherein, The system message is the switch signal of the target seventh sequence after OOK modulation.

72. The method according to claim 71, wherein, The terminal device, through the first receiver, uses either a first demodulation method or a second demodulation method to demodulate the system messages, including: The terminal device obtains the target seventh sequence by demodulating the system message using OOK through the first receiver.

73. The method according to claim 70, wherein, The open symbol of the system message is used to carry the signal of the target eighth sequence after OFDM modulation.

74. The method according to claim 73, wherein, The terminal device, through the first receiver, uses either a first demodulation method or a second demodulation method to demodulate the system messages, including: The terminal device obtains the target seventh sequence by demodulating the system message using OOK through the first receiver.

75. The method according to claim 73, wherein, The terminal device, through the first receiver, uses either a first demodulation method or a second demodulation method to demodulate the system messages, including: The terminal device uses the first receiver to demodulate the system messages using OFDM to obtain the target eighth sequence and / or the target seventh sequence.

76. The method according to any one of claims 73 to 75, wherein, The seventh target sequence and / or the eighth target sequence are used to carry system information of the system message.

77. The method according to claim 64 or 65, wherein, The terminal device receives system messages based on the synchronization signal, including: The terminal device receives the system message through a second receiver based on the synchronization signal.

78. A wireless communication method, applicable to network devices, wherein, The method includes: The network device sends a synchronization signal, which is received by a first receiver included in the terminal device.

79. The method according to claim 78, wherein, The first receiver is a low-power receiver (LPR).

80. The method according to claim 78 or 79, wherein, The synchronization signal includes a primary synchronization signal (PSS), and the network device sends the synchronization signal, including: The network device sends the PSS, which is received by the terminal device through the first receiver.

81. The method according to claim 80, wherein, The network device sends the PSS, including: The network device modulates the PSS and transmits the PSS.

82. The method according to claim 81, wherein, The signal waveform of the PSS is a switching signal, and the value of the switching signal on each symbol is either on or off.

83. The method according to claim 82, wherein, The network device modulates the PSS, including: The network device modulates the target first sequence to obtain the PSS.

84. The method according to claim 83, wherein, The network device modulates the target first sequence to obtain the PSS, including: The network device performs OOK modulation on the target first sequence to obtain the PSS.

85. The method according to claim 84, wherein, The PSS is used by the terminal device to obtain the target first sequence through OOK demodulation by the first receiver.

86. The method according to claim 83, wherein, The network device modulates the target first sequence to obtain the PSS, including: The network device performs OFDM modulation on the target second sequence and carries the OFDM-modulated signal of the target second sequence on the open symbol of the PSS.

87. The method according to claim 86, wherein, The on and off symbols of the PSS are associated with the target first sequence.

88. The method according to claim 87, wherein, The PSS is used by the terminal device to obtain the target first sequence through OOK demodulation by the first receiver; or... The PSS is used by the terminal device to obtain the target second sequence and / or the target first sequence through OFDM demodulation by the first receiver.

89. The method according to any one of claims 86 to 88, wherein, In the PSS, at least two open symbols correspond to the same target second sequence; or, At least two open symbols in the PSS correspond to different target second sequences.

90. The method according to claim 89, wherein, The target second sequence corresponding to at least two open symbols in the PSS is different, including: The at least two open symbols correspond to different parts of a target second sequence; or, The at least two open symbols each correspond to a different target second sequence.

91. The method according to any one of claims 86 to 90, wherein, The first target sequence and / or the second target sequence are used to carry the first information of the PSS.

92. The method according to any one of claims 80 to 91, wherein, The synchronization signal includes a secondary synchronization signal SSS. The network device sends the synchronization signal, including: The network device sends the SSS, which is received by the terminal device through the first receiver.

93. The method according to claim 92, wherein, The network device sends the SSS, including: The network device modulates the SSS and transmits the SSS.

94. The method according to claim 93, wherein, The signal waveform of the SSS is a switching signal, and the value of the switching signal on each symbol is either on or off.

95. The method according to claim 94, wherein, The network device performs SSS modulation, including: The network device modulates the target third sequence to obtain the SSS.

96. The method according to claim 95, wherein, The SSS is a plurality of switching signals, each of which is generated based on a target third sequence. The target third sequence corresponding to each of the switching signals is the same, or at least two of the switching signals correspond to different target third sequences.

97. The method according to claim 95 or 96, wherein, The network device modulates the target third sequence to obtain the SSS, including: The network device performs OOK modulation on the target third sequence to obtain the SSS.

98. The method according to claim 97, wherein, The SSS is used by the terminal device to obtain the target third sequence through OOK demodulation by the first receiver.

99. The method according to claim 95 or 96, wherein, The network device modulates the target third sequence to obtain the SSS, including: The network device performs OFDM modulation on the target fourth sequence and carries the OFDM-modulated signal of the target fourth sequence on the open symbol of the SSS.

100. The method according to claim 99, wherein, The on and off symbols of the SSS are associated with the target fourth sequence.

101. The method according to claim 100, wherein, The SSS is used by the terminal device to obtain the target third sequence through OOK demodulation by the first receiver; or, The SSS is used by the terminal device to obtain the target fourth sequence and / or the target third sequence by using OFDM demodulation through the first receiver.

102. The method according to any one of claims 99 to 101, wherein, In the SSS, at least two open symbols correspond to the same target fourth sequence; or, At least two open symbols in the SSS correspond to different target fourth sequences.

103. The method according to claim 102, wherein, The target fourth sequence corresponding to at least two open symbols in the SSS is different, including: The at least two open symbols correspond to different parts of a target fourth sequence; or, The at least two open symbols each correspond to a different target fourth sequence.

104. The method according to any one of claims 99 to 103, wherein, The target third sequence and / or the target fourth sequence are used to carry the second information of the SSS.

105. The method according to any one of claims 80 to 91, wherein, The synchronization signal includes SSS, and the method further includes: The network device sends the SSS, which is received by the terminal device through a second receiver.

106. The method according to any one of claims 92 to 105, wherein, The synchronization signal is used to perform one or more of the following functions: cell search, synchronization, and measurement.

107. The method according to claim 106, wherein, The function of the synchronization signal is achieved through the first information of the PSS and / or the second information of the SSS.

108. The method according to claim 107, wherein, The synchronization signal is used to carry the cell identifier.

109. The method according to claim 108, wherein, The cell identifier is carried in the first information of the PSS, or in the second information of the SSS, or carried together by the first information of the PSS and the second information of the SSS.

110. The method according to any one of claims 92 to 109, wherein, The synchronization signal includes the Physical Broadcast Channel (PBCH), and the network device transmits the synchronization signal including: The network device sends the PBCH, which is used by the terminal device to receive the PBCH through the first receiver.

111. The method according to claim 110, wherein, The network device sends the PBCH, including: The network device modulates the PBCH and transmits the PBCH.

112. The method according to claim 111, wherein, The signal waveform of the PBCH is a switching signal, and the value of the switching signal on each symbol is either on or off.

113. The method according to claim 112, wherein, The network device performs modulation of the PBCH, including: The network device modulates the target fifth sequence to obtain the PBCH.

114. The method according to claim 113, wherein, The PBCH consists of multiple switching signals, each of which is generated based on a target fifth sequence. The target fifth sequence corresponding to each of the switching signals is the same, or at least two of the switching signals correspond to different target fifth sequences.

115. The method according to claim 113 or 114, wherein, The network device modulates the PBCH based on the target fifth sequence, including: The network device performs OOK modulation on the target fifth sequence to obtain the PBCH.

116. The method according to claim 115, wherein, The PBCH is used by the terminal device to obtain the target fifth sequence through OOK demodulation by the first receiver.

117. The method according to any one of claims 113 to 114, wherein, The network device modulates the PBCH based on the target fifth sequence, including: The network device performs OFDM modulation on the target sixth sequence and carries the OFDM-modulated signal of the target sixth sequence on the open symbol of the PBCH.

118. The method according to claim 117, wherein, The open and close symbols of the PBCH are associated with the target fifth sequence.

119. The method according to claim 117 or 118, wherein, The PBCH is used by the terminal device to obtain the target fifth sequence through OOK demodulation via the first receiver; or, The PBCH is used by the terminal device to obtain the target sixth sequence and / or the target fifth sequence by using OFDM demodulation through the first receiver.

120. The method according to any one of claims 117 to 119, wherein, In the PBCH, at least two open symbols correspond to the same target sixth sequence; or, At least two open symbols in the PBCH correspond to different target sixth sequences.

121. The method according to claim 120, wherein, The target sixth sequence corresponding to at least two open symbols in the PBCH is different, including: The at least two open symbols correspond to different parts of a target sixth sequence; or, The at least two open symbols each correspond to a different target sixth sequence.

122. The method according to any one of claims 117 to 121, wherein, The fifth target sequence and / or the sixth target sequence are used to carry the broadcast information of the PBCH.

123. The method according to any one of claims 92 to 109, wherein, The synchronization signal includes PBCH, and the method further includes: The network device sends the PBCH, which is used by the terminal device to receive the PBCH through a second receiver.

124. The method according to any one of claims 78 to 123, wherein, The method further includes: The network device sends system messages based on the synchronization signal.

125. The method according to any one of claims 124, wherein, The network device sends system messages based on the synchronization signal, including: The network device sends the system message according to the PBCH in the synchronization signal; wherein the PBCH is used to indicate control resource information, the control resource information is used for receiving the physical downlink control channel, and the PDCCH is used for scheduling the system message.

126. The method according to claim 124 or 125, wherein, The system message is received by the terminal device through the first receiver according to the synchronization signal.

127. The method according to claim 126, wherein, The network device sends system messages including: The network device modulates the system message and sends the system message.

128. The method according to claim 127, wherein, The signal waveform of the system message is a switch signal, and the value of the switch signal on each symbol is either on or off.

129. The method according to claim 128, wherein, The network device modulates the system messages, including: The network device obtains the system message based on the modulation of the target seventh sequence.

130. The method according to claim 129, wherein, The network device obtains the system message based on the modulation of the target seventh sequence, including: The network device performs OOK modulation on the target seventh sequence to obtain the system message.

131. The method according to claim 130, wherein, The system message is used by the terminal device to obtain the target seventh sequence through OOK demodulation by the first receiver.

132. The method according to claim 129, wherein, The network device modulates the system messages, including: The network device modulates the target eighth sequence by carrying the OFDM-modulated signal of the target eighth sequence on the open symbol of the system message.

133. The method according to claim 132, wherein, The system message is used by the terminal device to obtain the target seventh sequence through OOK demodulation via the first receiver; or, The system message is used by the terminal device to obtain the target eighth sequence and / or the target seventh sequence by using OFDM demodulation through the first receiver.

134. The method according to any one of claims 132 to 133, wherein, The seventh target sequence and / or the eighth target sequence are used to carry system information of the system message.

135. The method according to claim 124 or 125, wherein, The system message is received by the terminal device through the second receiver according to the synchronization signal.

136. A terminal device, comprising: The first communication unit is configured to receive synchronization signals via a first receiver.

137. A network device, comprising: The second communication unit is configured to transmit a synchronization signal, which is received by a first receiver included in the terminal device.

138. A terminal device, comprising: A first receiver, a processor, and a memory for storing a computer program, the processor for calling and running the computer program stored in the memory to cooperate with the first receiver in performing the method as described in any one of claims 1 to 77.

139. A network device, comprising: A transceiver, a processor, and a memory for storing a computer program, the processor for calling and running the computer program stored in the memory to cooperate with the transceiver in performing the method as described in any one of claims 78 to 135.

140. A chip, comprising: A processor for retrieving and running a computer program from memory, causing a device having the chip mounted to perform the method as claimed in any one of claims 1 to 77, or the method as claimed in any one of claims 78 to 135.

141. A computer-readable storage medium for storing a computer program, the execution of which causes the computer to perform the method as claimed in any one of claims 1 to 77, or the method as claimed in any one of claims 78 to 135.

142. A computer program product comprising computer program instructions, the execution of which causes a computer to perform the method as claimed in any one of claims 1 to 77, or to perform the method as claimed in any one of claims 78 to 135.

143. A computer program, the execution of which causes a computer to perform the method as claimed in any one of claims 1 to 77, or to perform the method as claimed in any one of claims 78 to 135.

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