Wireless communication method, terminal equipment and network equipment

Abstract

The invention provides a wireless communication method, terminal equipment and network equipment. The method comprises: a terminal device receiving first information, the first information being used for indicating a frequency domain position of a first channel; wherein the first channel is a synchronization channel or a discovery channel. In the embodiments of the present application, a terminal device can obtain information (i.e., first information) for indicating the frequency of a synchronization channel / discovery channel. Based on the first information, the terminal device can realize self frequency offset calibration, thereby facilitating improvement of communication quality.

Description

Wireless communication method, terminal device and network device Technical Field

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

[0002] In communication systems, terminal devices often need to detect signals on synchronization and discovery channels to obtain useful information for subsequent communication. However, if the terminal device experiences significant frequency drift, it can hinder synchronization and discovery signal detection, impacting communication quality.

[0003] Summary of the Invention

[0004] The present application provides a communication method, terminal equipment and network equipment to improve the communication quality of a communication system.

[0005] In a first aspect, a wireless communication method is provided, including: a terminal device receives first information, where the first information is used to indicate a frequency domain position of a first channel; wherein the first channel is a synchronization channel or a discovery channel.

[0006] In a second aspect, a wireless communication method is provided, including: a network device sends first information, where the first information is used to indicate a frequency domain position of a first channel; wherein the first channel is a synchronization channel or a discovery channel.

[0007] According to a third aspect, a terminal device is provided, comprising: a receiving unit for receiving first information, wherein the first information is used to indicate a frequency domain position of a first channel; wherein the first channel is a synchronization channel or a discovery channel.

[0008] In a fourth aspect, a network device is provided, including: a sending unit, configured to send first information, wherein the first information is used to indicate a frequency domain position of a first channel; wherein the first channel is a synchronization channel or a discovery channel.

[0009] In a fifth aspect, a terminal device is provided, comprising a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory to execute the method described in the first aspect.

[0010] In a sixth aspect, a network device is provided, comprising a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory to execute the method described in the second aspect.

[0011] In a seventh aspect, a terminal device is provided, comprising a processor for calling a program from a memory to execute the method described in the first aspect.

[0012] In an eighth aspect, a network device is provided, comprising a processor for calling a program from a memory to execute the method described in the second aspect.

[0013] In a ninth aspect, a chip is provided, comprising a processor for calling a program from a memory so that a device equipped with the chip executes the method described in the first aspect or the second aspect.

[0014] In a tenth aspect, a computer-readable storage medium is provided, on which a program is stored, wherein the program enables a computer to execute the method described in the first aspect or the second aspect.

[0015] In an eleventh aspect, a computer program product is provided, comprising a program, wherein the program enables a computer to execute the method described in the first aspect or the second aspect.

[0016] In a twelfth aspect, a computer program is provided, which enables a computer to execute the method described in the first aspect or the second aspect.

[0017] In an embodiment of the present application, the terminal device can obtain information indicating the frequency of the synchronization channel / discovery channel (ie, the first information mentioned above). Based on the first information, the terminal device can calibrate its own frequency offset, thereby helping to improve communication quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is an example diagram of a zero-power communication system.

[0019] FIG2 is an exemplary diagram of the backscatter communication principle.

[0020] Figure 3 is the circuit diagram of resistive load modulation

[0021] FIG4 a is an exemplary diagram of a synchronous channel under a channel spacing.

[0022] FIG4 b is an exemplary diagram of a synchronization channel under another channel spacing.

[0023] FIG5 is an example diagram of a terminal device supporting WUR.

[0024] FIG6 is a schematic diagram of the structure of the WUR synchronization frame.

[0025] FIG7 is a schematic diagram of the structure of the WUR discovery frame.

[0026] FIG8 is a diagram illustrating an example of frequency error of a terminal device.

[0027] FIG9 is a flowchart of a wireless communication method provided in an embodiment of the present application.

[0028] FIG10 is an example diagram of the frequency deviation range of the terminal device provided in an embodiment of the present application.

[0029] FIG11 is an example diagram of a signal detection method based on relative channel numbering provided in an embodiment of the present application.

[0030] FIG12 is another example diagram of a signal detection method based on relative channel numbering provided in an embodiment of the present application.

[0031] FIG13 is another example diagram of a signal detection method based on relative channel numbering provided in an embodiment of the present application.

[0032] FIG14 is another example diagram of a signal detection method based on relative channel numbering provided in an embodiment of the present application.

[0033] FIG15 is an example diagram of a channel division method of a 2.4 GHz WiFi system provided in an embodiment of the present application.

[0034] FIG16 is a schematic diagram of a terminal device according to an embodiment of the present application.

[0035] FIG17 is a schematic diagram of a network device according to an embodiment of the present application.

[0036] FIG18 is a schematic structural diagram of a communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0037] The technical solutions in this application will be described below in conjunction with the accompanying drawings. For ease of understanding, the following first briefly introduces the concepts related to the embodiments of this application.

[0038] Zero-power communication technology

[0039] With the development of wireless communication technology, there is a desire to integrate wireless communication systems with various vertical industries, such as logistics, manufacturing, transportation, and energy. For example, wireless communication systems can be integrated with industrial wireless sensor networks (IWSNs). Another example is the integration of wireless communication systems with smart logistics and smart warehousing. Another example is the integration of wireless communication systems with smart home networks.

[0040] However, in these industries, terminal devices are usually required to have low cost, small size (such as ultra-thin), maintenance-free, and long life. Therefore, in order to meet the above conditions, as a solution, terminal devices can adopt ambient energy-based Internet of Things (IoT) devices, which can also be called ambient IoT devices or AMP IoT devices. The energy required for the operation of such ambient energy-based IoT devices comes from the collection of ambient energy. For example, the source of ambient energy can be wireless signals, solar energy, thermal energy, etc. IoT devices based on ambient energy are similar to the passive or semi-passive electronic tags in zero-power communication that will be introduced below.

[0041] As another solution, network devices and terminal devices (referred to as "terminals") can communicate using zero-power communication technology. In this case, the terminal devices can also be called "zero-power communication terminal devices."

[0042] In recent years, the application of zero-power devices has become increasingly widespread. A typical example is radio frequency identification (RFID), a technology that uses spatial coupling of wireless radio frequency signals to achieve contactless automatic transmission and identification of tag information. RFID tags are also known as "radio frequency tags" or "electronic tags."

[0043] Based on the power supply mode, electronic tags can be divided into active electronic tags, passive electronic tags and semi-passive electronic tags.

[0044] Active electronic tags, also known as active tags, are powered by batteries. The battery, memory, and antenna together form an active electronic tag, which transmits information using a set frequency band until the battery is replaced. Active electronic tags typically generate a specific signal after storing a certain amount of energy. This method is called active transmission. To conserve power, active electronic tags can also communicate by backscattering a carrier signal. This method is called passive transmission.

[0045] Passive electronic tags, also known as passive electronic tags, do not have internal batteries. When a passive electronic tag approaches a reader, the tag's antenna, within the near field of the reader's antenna radiation, generates an induced current through electromagnetic induction. This induced current drives the tag's chip circuit. The chip circuit then transmits the tag's identification information to the reader via the tag's antenna.

[0046] Semi-passive tags, also known as semi-active tags, inherit the advantages of passive tags: small size, light weight, low price, and long service life. When not being accessed by a reader / writer, the battery in these tags only powers a small portion of the chip's internal circuitry. Only when a reader / writer is present can the battery power the RFID chip, increasing the tag's read / write range and improving communication reliability.

[0047] 1 shows an example diagram of a zero-power communication system. The zero-power communication system 100 may be composed of two parts: a reader / writer 110 and a passive electronic tag (TAG) 120.

[0048] The reader / writer 110 can not only read the information on the electronic tag, but also write the information into the electronic tag. At the same time, the reader / writer 110 can also provide the electronic tag with the energy required for communication.

[0049] The electronic tag 120 can be composed of a coupling component and a chip. In some implementations, each electronic tag can have a unique electronic code, allowing it to be placed on a target to mark the object. Once the electronic tag enters an electromagnetic field, it can receive radio frequency signals from a reader. Passive or passive electronic tags utilize energy generated by the electromagnetic field in space to transmit the information stored on the tag.

[0050] The electronic tag 120 may generally include an energy harvesting module 121 and a backscatter communication module 122 . In some implementations, the electronic tag 120 may further include a low-power computing module 123 and a sensor module 124 .

[0051] The energy collection module 121 can be used to collect energy. For example, energy can be collected through the wireless power supply signal sent by the reader. The wireless power supply signal can be a "radio frequency signal" sent by the network device. Therefore, the above-mentioned energy collection module is also called a "radio frequency energy collection module." The backscatter communication module 122 can be used for backscattering communication between the terminal device and the network device. The low-power computing module 123 can be used to provide computing functions for the terminal device, such as data processing. The sensor module 124 can be used to collect external information (for example, ambient temperature, ambient humidity, etc.).

[0052] Backscatter communication is a key technology in zero-power communication systems. The following describes the backscatter communication principle of an embodiment of the present application in conjunction with FIG2 .

[0053] As shown in Figure 2, backscatter tag 220 receives the wireless signal (also called the carrier signal) transmitted by backscatter reader 210 and simultaneously collects energy through the RF energy harvesting module. Furthermore, a logic processing module (also called the low-power processing module) modulates the incoming signal to carry the data to be transmitted. Finally, the modulated signal is radiated from the antenna. This information transmission process is called backscatter communication.

[0054] In some implementations, the transmit (transmit, TX) path of the backscatter reader 210 may be further provided with other devices for processing the transmitted signal, such as an amplifier (AMP). The receive (receive, RX) path of the backscatter reader 210 may also be provided with other devices for processing the received signal, such as a low noise amplifier (LNA).

[0055] Based on the above-mentioned principle of backscatter communication, terminal devices in backscatter communication generally have the following advantages.

[0056] Advantage 1: Since the terminal device does not need to actively transmit signals, backscatter communication can be achieved by modulating the incoming signal.

[0057] The second advantage is that since the terminal equipment does not rely on traditional active power amplifier transmitters and uses low-power computing units, the hardware complexity can be greatly reduced.

[0058] Advantage three: Since the terminal device can use backscatter technology to communicate with the reader, the terminal device can achieve battery-free communication through energy harvesting.

[0059] The following briefly introduces the characteristics of the backscatter signal during the backscatter communication of the zero-power terminal device.

[0060] The frequency of the backscattered signal can be the same as the incoming signal, or it can be frequency offset. When frequency offset occurs, the offset amount of multiple zero-power terminal devices can be the same or different.

[0061] Backscatter can be triggered immediately upon receiving an incoming signal or after a certain time offset. When there is a time offset, the time offset of the reflected signals from multiple devices can be the same or different.

[0062] The spatial characteristics of the backscattered signal can be set as needed. For example, an antenna array can be used to achieve a larger antenna gain in a certain direction and a smaller gain in other directions, so that the signal power is concentrated in a certain spatial direction.

[0063] While backscattering signals, zero-power devices can also perform information modulation (also known as load modulation). Load modulation is a common method for electronic tags to transmit data to readers. Load modulation adjusts the electrical parameters of the electronic tag's oscillating circuit according to the rhythm of the data stream, thereby changing the magnitude and phase of the electronic tag's impedance, thereby completing the modulation process.

[0064] Load modulation technology mainly includes two methods: resistance load modulation and capacitance load modulation. Figure 3 shows a circuit diagram of resistance load modulation. L A resistor, called a load modulation resistor (R3 in Figure 3), is connected in parallel across the switch S. This resistor is switched on and off according to the data stream clock, thereby modulating the backscatter signal. The on and off of the switch S can be controlled by binary data encoding.

[0065] In capacitive load modulation, a capacitor can be connected in parallel across the load to replace the load modulation resistor controlled by binary data encoding in Figure 3.

[0066] It should be noted that the implementation method of the load modulation technology of the circuit described in Figure 3 is similar to the implementation method of the existing circuit for implementing load modulation technology. For the sake of simplicity, the functions of the resistor R2, capacitors C1 and C2, and inductors L1 and L2 shown in Figure 3 are not repeated.

[0067] It should be noted that the above description uses readers and electronic tags as examples to illustrate zero-power communication technology. Zero-power communication technology can also be applied to communications between other types of terminal devices and network devices.

[0068] The terminal device in the embodiment of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal device, wireless communication device, user agent or user device. The terminal device in the embodiment of the present application may be a device that provides voice and / or data connectivity to a user, and can be used to connect people, objects and machines, such as household appliances, sensors, electronic tags, etc. with wireless connection functions. The terminal in the embodiment of the present application may be a wireless terminal in a smart home, a wireless terminal in an IWSN, a wireless terminal in smart logistics and smart warehousing, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, etc.

[0069] The network device in the embodiments of the present application may be a device for communicating with a terminal device. If the terminal device is an electronic tag, the network device may be a reader / writer for reading and writing the electronic tag (for example, a reader / writer based on radio frequency identification technology). The network device may also be an access network device or a wireless access network device, such as a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects the terminal device to a wireless network. A base station can broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmission point (TP), master station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. A base station can also refer to a communication module, modem or chip used to be set in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs base station functions in device-to-device D2D, vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. The base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the network equipment.

[0070] Cell Search

[0071] In traditional cellular networks, network equipment provides services to terminal devices by deploying cells. In some cases, such as when a terminal device is just started, the terminal device needs to perform a cell search to find available cells and then select a cell (for example, one with the strongest signal energy) to reside in. When a service needs to be transmitted, the terminal device can initiate a random access process to establish a connection with the network. It can be seen that cell search can be the first step for a terminal device to obtain cellular network services. Through cell search, the terminal device can search and find a suitable cell and then access the cell. Generally, the cell search process can involve the following three aspects.

[0072] First, the terminal device can tune the receiving end to the corresponding frequency point to search for signals based on the supported frequency points and the frequency band provided by the operator. For example, the terminal device can tune the receiving end to the frequency point supported by the terminal device within the frequency band provided by the operator to search for signals.

[0073] Secondly, the terminal device can obtain initial time and frequency synchronization, cell ID, master information block (MIB), etc. by detecting the synchronization signal sent by the cell. The MIB contains other system information block (SIB) related configurations, whether to allow resident, whether to allow same-frequency reselection, etc.

[0074] Thirdly, the terminal device can receive broadcast messages sent by the cell.

[0075] In the above process, to support the terminal device to complete the cell search, the network equipment needs to send synchronization signals and broadcast signals (especially those that need to carry MIB information). For example, in the NR network, the gNB can send SS / PBCH blocks (synchronization signal and PBCH block, referred to as SSB) to 5G terminal devices.

[0076] Typically, synchronization signals are sent at specific frequencies, which are referred to as synchronization raster in NR networks. Assuming the total bandwidth of an available downlink frequency band is 35 MHz, the channel bandwidth of the communication system is X = 0.18 MHz = 180 kHz (corresponding to one PRB with a 15 kHz subcarrier spacing). Depending on the frequency spacing of different specific synchronization channels, there may be multiple synchronization channel frequencies within the downlink frequency band.

[0077] Figure 4 (including Figure 4a and Figure 4b) shows examples of synchronization channels at two channel spacings. The arrows in Figure 4 represent the synchronization channel frequencies, and the intervals between the arrows represent the synchronization channel frequency spacings. The synchronization channel frequency spacing in Figure 4a is 180 kHz, while the synchronization channel frequency spacing in Figure 4b is 360 kHz.

[0078] During the cell search process, the terminal device can sequentially search on the synchronization channel frequency points (such as the multiple frequency points shown in Figure 4). By detecting the correlation of the synchronization signal, it can be determined whether there is a cell at that frequency point. Taking Figure 4b as an example, that is, during the cell search process, the terminal device needs to tune the receiving end frequency to the three synchronization channel frequencies A, B, and C in the figure in sequence to search for the synchronization signal. If a synchronization signal is detected on a synchronization channel frequency point, the time-frequency synchronization information can be obtained based on the synchronization signal, thereby preparing for the subsequent communication process.

[0079] Wake-up receiver (WUR)

[0080] In order to meet the energy-saving needs of terminal devices, some standards, such as R18, plan to introduce WUR to receive wake-up signals (WUS), which can also be called energy-saving signals. WUR has the characteristics of extremely low cost, extremely low complexity and extremely low power consumption. It mainly receives wake-up signals based on envelope detection. Therefore, the wake-up signal received by WUR is different from the modulation method, waveform, etc. of the signal based on PDCCH carried by the existing R16 and R17 standards. The wake-up signal is mainly an envelope signal that ASK modulates the carrier signal. In some implementations, the demodulation of the envelope signal can be completed based on the energy provided by the wireless radio frequency signal to drive the low-power circuit, and the terminal device does not need to be powered, so the WUR can be passive. In other implementations, the WUR can also be powered by the terminal device. Regardless of the power supply method, WUR greatly reduces power consumption compared to traditional receivers of terminal devices. For example, WUR can achieve power consumption of less than 1 milliwatt (mw), which is much lower than the power consumption of tens to hundreds of mw of traditional receivers.

[0081] Currently, WUR can be combined with terminal equipment as an additional module of the terminal equipment's receiver. Of course, WUR can also be used as a module of a terminal equipment alone.

[0082] Figure 5 is an example diagram of a terminal device that supports WUR. Referring to Figure 5, the terminal device 500 may include a main receiver 510 and a WUR520. In order to save power consumption of the terminal device 500, the terminal device 500 may be configured to be in a sleep state (for example, when the terminal device is in a DRX sleep period), or in other words, the main receiver 510 of the terminal device may be in a sleep state, at which point the terminal device 500 may utilize the WUR520 to receive a wake-up signal. In some cases, if the terminal device 500 needs to wake up the main receiver 510, the network device may send a wake-up signal, and accordingly, the terminal device may monitor the WUS through the WUR520. When the WUR520 monitors the WUS, it may wake up the main receiver 510. Otherwise, the main receiver 510 of the terminal device may be in a sleep state.

[0083] Typically, a WUR needs to synchronize with network devices to achieve communication. As an implementation, the WUR can synchronize with network devices based on a WUR synchronization frame. Figure 6 shows a schematic diagram of the structure of a WUR synchronization frame.

[0084] Referring to Figure 6, the WUR synchronization frame can be composed of a non-WUR part and a WUR part. The non-WUR part is sent in an OFDM waveform, and the WUR part is sent in a WUR OOK waveform. The WUR part can be composed of a WUR preamble and WUR data, and the WUR data can include a MAC header, a payload, and a frame check sequence (FCS). The type of the WUR preamble synchronization sequence is related to the data transmission rate, and the low-rate LDR and the high-rate HDR use different synchronization structures.

[0085] As an implementation method, the network device can send WUR synchronization frames at a specific frequency (or called WUR channel). In this way, the terminal device needs to tune the frequency to the WUR channel to receive the WUR synchronization frame.

[0086] In some embodiments, a wireless communication network may include access points (APs) and stations (STAs). When the communication quality of a station's current communication link degrades, the station may proactively poll the AP on each channel to obtain a probe response, and then switch the basic service set based on the probe response results. Because this process may take a considerable amount of time, it may affect the communication quality of the terminal device.

[0087] To solve this problem, for APs that support WUR (also known as WUR APs), the WUR channel can include a WUR discovery channel. The WUR AP can send a WUR discovery frame on the discovery channel to indicate the location of the main channel, thereby avoiding users wasting energy by searching for multiple candidate channels.

[0088] Figure 7 shows a schematic diagram of the structure of a WUR discovery frame. Referring to Figure 7, the WUR discovery frame includes a MAC header, a frame body, and an FCS. The frame body may include a PCR channel field and a compressed service set identifier (SSID), and the PCR channel field may indicate the primary channel of the AP. For example, the PCR channel field may include an operation category field and a channel field, and the operation category field and the channel field may uniquely identify the primary channel.

[0089] The WUR channel may include one or more WUR discovery channels. In actual use, the terminal device needs to tune the frequency to the frequency of the WUR discovery channel to search and receive the WUR discovery frame.

[0090] Based on the above, it can be seen that in communication systems, terminal devices often need to perform signal detection on the synchronization channel / discovery channel to obtain useful information to prepare for subsequent communication processes. For example, during the cell search process, the terminal device needs to search for the synchronization channel and detect the synchronization signal to achieve time-frequency synchronization. For another example, in a Wi-Fi system, the terminal device needs to search for the discovery channel and detect the discovery signal to obtain information about the primary channel. For another example, in a Wi-Fi system, the terminal device needs to search for the synchronization signal and detect the synchronization frame to achieve time-frequency synchronization.

[0091] During the above signal detection process, the terminal device needs to tune its frequency to a specific frequency point (the frequency point corresponding to the synchronization channel or discovery channel). However, if the frequency drift of the terminal device (such as the zero-power device mentioned above) is large, it will be detrimental to the detection of the synchronization signal / discovery signal, thereby affecting the communication quality.

[0092] To facilitate understanding, the following uses the example of a zero-power terminal device searching for a cellular network synchronization signal to provide a detailed introduction to the problems that may be caused by frequency drift of the terminal device.

[0093] Zero-power terminal devices, due to their battery-free, maintenance-free, and low-cost features, are ideal for large-scale deployments and specialized scenarios, such as cargo in logistics, animals on livestock farms, and critical components in high-temperature and high-pressure environments. However, due to cost constraints, these zero-power terminal devices typically lack crystal oscillators or have low oscillator precision, making them prone to frequency drift.

[0094] Figure 8 shows an example of a terminal device's frequency error. For example, when a zero-power terminal device needs to search for a synchronization signal on the synchronization channel at three frequencies (925 + 0.5 + [0.18, 0.36, 0.54]) MHz, i.e., [f1 = 925.68, f2 = 925.86, f3 = 926.04] MHz, it can adjust its receiving frequency (e.g., the center frequency of the receiver) to the frequency corresponding to the synchronization channel. However, due to frequency drift (e.g., an increase of 0.2 MHz from the ideal frequency), the zero-power terminal device actually aligns to the receiving frequency of [f1' = 925.88, f2' = 926.06, f3' = 926.24] MHz. In other words, the terminal device expects its receiving frequency to be Y MHz, but the actual frequency it aligns to is (Y + 0.2) MHz.

[0095] As a result, the zero-power terminal device may mistakenly detect the synchronization signal at f1' = 925.88 MHz as the synchronization signal at f1 = 925.68 MHz. However, the zero-power terminal device actually receives the synchronization signal sent by the network device at f2 = 925.86 MHz. This hinders frequency synchronization and affects communication performance.

[0096] To avoid the above problems, the present application provides a wireless communication method that can indicate the frequency information of the synchronization channel / discovery channel to a terminal device. Based on this information, the terminal device can calibrate its own frequency offset, thereby helping to improve communication quality.

[0097] The following describes a wireless communication method according to an embodiment of the present application in conjunction with FIG9 . The method shown in FIG9 can be applied to a cellular communication system or a Wi-Fi system. The method shown in FIG9 is described from the perspective of the interaction between a network device and a terminal device, and the network device and the terminal device can be any type of network device and terminal device mentioned above. For example, the network device can be a base station, and the terminal device can be a UE. For another example, the network device can be an AP, and the terminal device can be an STA. For another example, the network device can be a reader or a UE, and the terminal device can be a zero-power device, an IoT device, etc.

[0098] 9 , in step S910, the terminal device receives first information. Alternatively, the network device sends the first information to the terminal device. After receiving the first information, the terminal device can perform channel discovery and / or time-frequency synchronization based on the frequency domain position indicated by the first information.

[0099] The first information can be used to indicate the frequency domain position of the first channel. The first channel can be a synchronization channel or a discovery channel. Taking the first channel as a synchronization channel as an example, the synchronization channel can be a synchronization channel in a cellular network, such as a channel carrying SSB. Alternatively, the synchronization channel can be a synchronization channel in a wifi system, such as a channel carrying the synchronization frame shown in Figure 6. Taking the first channel as a discovery channel as an example, the first channel can be a channel that carries a discovery frame (see Figure 7); or, the first channel is a channel that sends a discovery signal.

[0100] The first information is used to indicate the frequency domain position of the first channel, which can also be replaced by: the first information is used to indicate the frequency of the first channel; or the first information is used to indicate the frequency point of the first channel. It should be understood that in the embodiments of the present application, the meanings of frequency, frequency point, and frequency domain position are equivalent and can be used interchangeably.

[0101] In some implementations, the frequency domain position of the first channel may refer to the center frequency of the first channel. For example, for a synchronization channel in NR, the synchronization channel includes 20 PRBs, and the frequency domain position of the first channel may refer to subcarrier No. 0 (i.e., the center frequency) of the 10th PRB among the 20 PRBs.

[0102] In some implementations, the frequency domain position of the first channel may refer to the starting frequency position of the first channel. For example, for a synchronization channel in NR, the synchronization channel includes 20 PRBs, and the frequency domain position of the first channel may refer to subcarrier No. 0 of the first PRB among the 20 PRBs (i.e., the starting frequency position).

[0103] In some implementations, the frequency domain position of the first channel may refer to the end frequency position of the first channel. For example, for a synchronization channel in NR, the synchronization channel includes 20 PRBs, and the frequency domain position of the first channel may refer to the 11th subcarrier (i.e., the end frequency position) of the last PRB of the 20 PRBs.

[0104] In addition to the above three frequency domain positions, the frequency position of the first channel may also refer to other frequency positions, which can be set according to actual communication requirements and are not limited in this embodiment of the present application.

[0105] In the embodiment of the present application, the first information may include or indicate one or more of the following information: a frequency value of the first channel, and a channel number of the first channel.

[0106] As an implementation, the first information may include or indicate a frequency value of the first channel, such as an absolute frequency value of the first channel. For example, if the frequency of the first channel is 925.86 MHz, the first information may include 925.86 MHz, or the first information may indicate 925.86 MHz. In some cases, the first information may also include or indicate a relative frequency value of the first channel.

[0107] When the frequency range is large, directly indicating the frequency value of the first channel requires more transmission resources. Therefore, in some implementations, the first information may include or indicate the channel number of the first channel.

[0108] In some embodiments, the channel number of the first channel may refer to a relative channel number of the first channel.

[0109] The specific design method of the relative channel number can take into account one or more factors. For example, the relative channel number can be associated with one or more of the following information: the center carrier frequency of the first channel; the bandwidth supported by the communication system or terminal device; the frequency band supported by the communication system or terminal device; the subcarrier spacing supported by the communication system or terminal device; the channel spacing of the synchronization channel or discovery channel; and the frequency deviation of the terminal device. For example, the maximum frequency deviation range of the terminal device can be determined based on the center carrier frequency of the first channel and the frequency deviation (or frequency deviation performance) of the terminal device. Then, the channel spacing of the first channel can be determined based on one or more of the bandwidth supported by the terminal device, the frequency band supported by the terminal device, and the subcarrier spacing supported by the terminal device. Then, based on the channel spacing of the first channel and the maximum frequency deviation range of the terminal device, the channel or frequency grouping method can be determined to determine the relative channel number of the first channel. This will be described in detail later in conjunction with specific embodiments and will not be described in detail here.

[0110] As an example, the relative channel number of the first channel may refer to the relative number of the first channel in the first channel group. If the bandwidth supported by the terminal device or the total bandwidth of the communication system supported by the terminal device is divided into multiple channel groups, the channels in each channel group of the multiple channel groups may be numbered within the group. Among them, the multiple channel groups may include the first channel group, and the first channel group may include the first channel, then the relative channel number of the first channel may be the intra-group number (i.e., relative number) of the first channel in the first channel group. For example, if the bandwidth supported by the terminal device is divided into multiple channel groups, and each channel group includes three channels, then the value range of the relative channel number of the first channel may be 0, 1, 2.

[0111] In some implementations, the number of channels included in the first channel group may be greater than or equal to the number of channels included in the frequency error range of the terminal device, thereby avoiding the occurrence of multiple channel numbers with the same value within the frequency error range of the terminal device.

[0112] For example, the frequency error of the terminal device is ±240kHz (that is, the frequency error range is 480kHz), and the interval of the synchronization channel is 180kHz. At this time, the frequency error range of the terminal device may include 3 synchronization channels. Then, the number of channels included in the first channel group can be greater than or equal to 3 synchronization channels.

[0113] In some embodiments, the relative number of the first channel may refer to the channel number of the first channel within the first frequency band (the first channel belongs to the first frequency band). In other words, the first frequency band may be divided into multiple channels, and the multiple channels within the first frequency band may be numbered to determine the relative number of the first channel.

[0114] The first frequency band may be one or more frequency bands supported by the communication system or terminal device. In some cases, the communication system or terminal device supports one frequency band. If the frequency band can be divided into 7000 channels, then the relative number of the first channel can be determined by numbering these 7000 channels (such as 0 to 6999 or 1 to 7000). In other cases, the communication system or terminal device may support more than one frequency band. Taking the terminal device supporting two frequency bands as an example, if the two frequency bands can be divided into 7000 and 8000 channels respectively, then the relative number of the first channel can be determined by uniformly numbering these 15,000 channels. In other cases, the communication system or terminal device may support more than one frequency band, and the multiple frequency bands may be far apart (or far beyond the user frequency deviation range). Taking the terminal device supporting two frequency bands as an example, if one frequency band supported by the terminal device is around 900MHz and the other frequency band is around 2.4GHz (that is, there is no ambiguity between the two frequency bands), then each frequency band can be numbered separately to determine the relative number of the first channel in the corresponding frequency band.

[0115] It should be noted that if a relative channel number is used to indicate the frequency domain position of the first channel, the above channel grouping method and the first frequency band supported by the terminal device can be predefined by the protocol or agreed upon by the network device and the terminal device.

[0116] In the embodiment of the present application, the relative numbering of the first channel can determine the frequency domain position of the first channel with fewer transmission resources. For example, if the first channel group includes three channels, only two bits are needed to indicate the frequency domain position of the first channel.

[0117] In some embodiments, the channel number of the first channel may be an absolute channel number of the first channel. Different from the relative channel number, the absolute channel number may correspond to the absolute frequency of the first channel, that is, each channel number corresponds to an absolute frequency value.

[0118] For example, the absolute number of the first channel may refer to the NR absolute channel number (NR absolute radio frequency channel number, NR-ARFCN) (which may be referred to as ARFCN for short), which corresponds to the global channel grid, and each number may correspond to an absolute frequency domain position. For another example, the absolute number of the first channel may refer to the global synchronization channel number (GSCN), which corresponds to the global synchronization grid, and each number may correspond to an absolute frequency domain position. For another example, the absolute number of the first channel may refer to the number of the channel in the 2.4GHz WiFi scenario.

[0119] The embodiment of the present application can accurately and directly determine the frequency domain position of the first channel through the absolute number of the first channel.

[0120] It should be noted that the network device and the terminal device may reach a pre-agreed agreement on the manner in which the first information indicates the frequency domain position of the first channel, or the indication may be made during the communication process. For example, the manner in which the frequency domain position of the first channel is indicated may be predefined or preconfigured by a protocol. For another example, the manner in which the frequency domain position of the first channel is indicated may be negotiated by the communicating parties during the communication process.

[0121] The above describes a method for the first information to indicate the frequency domain position of the first channel. The following describes a method for carrying the first information.

[0122] In actual use, the first information can be carried in one of the following: an SSB; a beacon frame; a wake-up receiver synchronization frame; and a discovery frame. For example, in a cellular network, the first information can be carried in a synchronization signal and a broadcast channel block. For another example, in a WiFi scenario, the first information can be carried in a beacon frame, a wake-up receiver synchronization frame, and a discovery frame.

[0123] As an implementation, the first information may be carried on a first channel. For example, if the first channel is a synchronization channel or a discovery channel, the synchronization channel or discovery channel may carry its own frequency domain location information. For example, if the first channel is a synchronization channel of a cellular network, the first information may be carried in an SSB sent by the synchronization channel, such as in an MIB.

[0124] As another implementation, the first information can be carried on a second channel. That is, the first information can be carried on a channel different from the first channel. For example, the first information may indicate the frequency position of a synchronization channel, and the first information may be carried on a discovery channel. For another example, the first information may indicate the frequency position of a channel containing a beacon frame, and the first information may be carried on a discovery channel.

[0125] In some embodiments, the first information may be carried via an information field. That is, the first information may be carried directly in a signal block or frame field of the above type. For example, the first information may be carried in the PPDU packet portion of a beacon frame, or in the data portion of a WUR synchronization frame (i.e., the WUR data field of the synchronization frame shown in FIG. 6 mentioned above), or in the data portion of a discovery frame (i.e., the frame body field of the discovery frame in FIG. 7 mentioned above).

[0126] In other embodiments, the first information may be carried by a reference signal sequence. For example, the first information may be carried by a physical broadcast channel demodulation reference signal (PBCH-DMRS) or a synchronization sequence. As an example, X different sequences may be used to represent X frequency domain locations, such as X channel numbers. In actual use, the X different sequences may be different pseudo-random sequences determined according to different register initial values, or may be different cyclic shifts of the same sequence.

[0127] If the first information is carried in the information field, the terminal device can directly obtain the first information in the carrying position and carrying field. If the first information is carried in a reference signal sequence, the terminal device can obtain the carried first information by blindly detecting the reference signal sequence.

[0128] As mentioned above, the first information may indicate or include the relative channel number of the first channel in the channel group of the first channel. hereinafter, in combination with Figures 10 to 14, taking the system operating center frequency of 1 GHz, the frequency interval between synchronization channels of 180 kHz, and the frequency drift of the terminal device of 240 ppm as an example, the signal detection method based on the relative channel number of the first channel in the first channel group will be introduced.

[0129] PPM stands for parts per million and represents the allowable frequency deviation from a specific center frequency. The frequency drift of the terminal device is 240 ppm, meaning its frequency offset range is between -240 kHz and +240 kHz.

[0130] Based on the above content, it can be known that N=3 synchronization channel frequency points may appear in the terminal device within the frequency offset error range (as shown in FIG. 10 ).

[0131] Figure 10 is an example diagram of the frequency deviation range of a terminal device provided in an embodiment of the present application. The upper portion of the frequency coordinate axis may represent the frequency perceived by the network device, or the actual frequency, while the lower portion of the frequency coordinate axis may represent the frequency perceived by the terminal device. The 925.68 MHz, 925.86 MHz, 926.04 MHz, 926.22 MHz, and 926.40 MHz shown in the figure are schematic frequencies of the synchronization channel.

[0132] As shown in Figure 10, when a terminal device attempts to align with the ideal frequency of 926.04 MHz, the actual receiving frequency may be anywhere within the range of [925.8 MHz, 926.28 MHz] (as shown by the shaded area in Figure 10). This indicates that within the frequency offset error range, the terminal device may have N = 3 synchronization channel frequencies (925.86 MHz, 926.04 MHz, and 926.22 MHz).

[0133] If the terminal device's frequency drift is close to the left, it may search for signals at the 925.86MHz synchronization frequency. If the terminal device's frequency drift is close to the right, it may search for signals at the 926.22MHz synchronization frequency. This may cause errors in the terminal device's frequency synchronization results, affecting communication quality.

[0134] Therefore, based on the relative channel number within the group of the first channel mentioned above (here it can refer to the ideal channel corresponding to the ideal frequency point), the frequency domain position of the first channel can be indicated to solve the problem of frequency synchronization deviation caused by the frequency error of the terminal device, thereby affecting the channel quality.

[0135] Furthermore, if the number of synchronization channel frequencies in each group can be M, only ceil(log2(M)) bits are needed to indicate the M synchronization channel frequencies within the group, where ceil represents rounding up. Compared to indicating the absolute frequency value or absolute channel number of the first channel, indicating the relative number of the first channel within the synchronization channel group can significantly reduce the required indication overhead.

[0136] In order to ensure that the frequency domain position of the first channel can be uniquely determined based on the relative channel number of the first channel, the number M of synchronization channel frequencies in each channel group should be greater than or equal to the number N of synchronization channel frequencies that may appear within the frequency deviation error range of the terminal device.

[0137] The following describes in detail the wireless communication method based on the relative channel numbering within the group of the first channel in conjunction with Figures 11 to 14. The representation method of Figures 11 to 14 is similar to that of Figure 9 and will not be repeated here for simplicity.

[0138] Figures 11 through 13 use M = N = 3 as an example. This means each channel group can include three synchronization channel frequencies, and the relative number m within the synchronization channel group can range from 0 to 2. As previously mentioned, the frequency error range of a terminal device may include three synchronization frequencies. Therefore, the frequency point actually searched by the terminal device may be the ideal frequency point, the synchronization frequency point immediately preceding the ideal frequency point, or the synchronization frequency point immediately following the ideal frequency point. The following describes a method for estimating the actual frequency point of a terminal device based on the relative number of the channel within the group, using several different scenarios.

[0139] Referring to Figure 11, if the terminal device wants to search for the frequency point of 925.86MHz (i.e., the ideal frequency point), it is known that the synchronization channel frequency point is numbered m=1 in the group. Then, during the actual search process, the terminal device can estimate the actual frequency point of the terminal device based on the relative number of the synchronization channel in the group indicated by the received network device, so as to perform frequency deviation estimation, calibration, and synchronization, etc.

[0140] If the network device indicates that the group number m of the synchronization channel is 0 (small), it means that the actual frequency of the terminal device is lower than the ideal frequency, and may be around 925.68 MHz.

[0141] If the network device indicates that the intra-group number of the synchronization channel is m=1 (which is the same as the intra-group relative number of the ideal frequency point), it means that the actual frequency point of the terminal device is near the ideal frequency point.

[0142] If the network device indicates that the intra-group number of the synchronization channel is m=2 (slightly larger), it means that the actual frequency of the terminal device is higher than the ideal frequency, possibly around 926.04 MHz.

[0143] Referring to FIG. 12 , for example, the terminal device wants to search for the frequency point 926.04 MHz, and it is known that the number of the synchronization channel frequency point in the group is m=2.

[0144] During the actual search process of the terminal device, if the network device indicates that the group number m of the synchronization channel is 0 (slightly small, but cyclically offset to the next group, i.e. channel group 1), it means that the actual frequency of the terminal device is higher than the ideal frequency, around 926.22MHz.

[0145] If the network device indicates that the intra-group number m of the synchronization channel is 1 (small), it means that the actual frequency of the terminal device is lower than the ideal frequency, and is around 925.86 MHz.

[0146] If the network device indicates that the intra-group number of the synchronization channel is m=2 (the same as the intra-group number corresponding to the ideal frequency), it means that the actual frequency of the terminal device is near the ideal frequency 926.04 MHz.

[0147] Referring to FIG. 13 , for example, the terminal device wants to search for the frequency point 926.22 MHz, and it is known that the number of the synchronization channel frequency point in the group is m=0.

[0148] During the actual search process of the terminal device, if the network device indicates that the group number m of the synchronization channel is 0 (the same as the group number corresponding to 926.22 MHz), it means that the actual frequency of the terminal device is near the ideal frequency 926.22 MHz.

[0149] If the network device indicates that the group number m of the synchronization channel is 1 (slightly larger), it means that the actual frequency of the terminal device is higher than the ideal frequency, and is around 926.40 MHz.

[0150] If the network device indicates that the synchronization channel's group number m=2 (large, but cyclically offset to the previous group, i.e., channel group 0), it means that the actual frequency of the terminal device is lower than the ideal frequency, around 926.04 MHz.

[0151] In some embodiments, the number of channels included in the channel group may be greater than the number of channels included in the frequency error range of the terminal device, that is, M>N.

[0152] FIG14 is another example diagram of a signal detection method based on relative channel numbers provided in an embodiment of the present application. As shown in FIG14 , each channel group includes four synchronization channel frequency points, and the number of channels included in the frequency error range of the terminal device is three. During the synchronization channel search process, the terminal device can estimate the actual frequency point of the terminal device based on the group number of the ideal frequency point and the group number of the received synchronization frequency point. The actual frequency point estimation method of the terminal device is similar to that in the case of M=N described above, and for the sake of simplicity, it will not be repeated here.

[0153] As mentioned above, the first information may also indicate or include a relative channel number of the first channel within the first frequency band. The first frequency band may refer to one or more frequency bands supported by the terminal device. As an implementation, the one or more frequency bands supported by the terminal device may be divided into multiple channels, and each channel may be numbered. The first information may then indicate the frequency domain position of the first channel by using the channel number among the multiple channels.

[0154] In the above method, the division of one or more frequency bands can follow the existing division method or can be customized. The following uses the existing division method as an example to introduce the relative channel number of the first channel in the first frequency band.

[0155] For example, the relative channel number of the first channel in the first frequency band can be determined based on NR-ARFCN or GSCN. Taking the NR-ARFCN channel as an example, the ARFCN channel is divided according to a 5kHz grid below 3GHz. If the bandwidth of the frequency band supported by the terminal device is 35MHz (below 3GHz), then the band supported by the terminal device can be divided into 7000 ARFCN channels. Furthermore, the 7000 channels are numbered, and the frequency domain position of the first channel can be indicated by the corresponding number of the first channel in the 7000 channels.

[0156] In addition, to indicate the relative number within the band (ie, to distinguish the 7000 channels), ceil[log2(7000)]=13 bits may be required.

[0157] The above method can be applied to terminal devices that only support one band, or terminal devices that support multiple bands but have a large interval between the multiple bands (such as supporting two bands, one at 900MHz and the other at 2.4GHz). That is to say, if the terminal device supports two bands, but the interval between the two bands is large, then the above-mentioned channel division and channel numbering can be performed separately for the two bands supported by the terminal device. In this case, although the terminal device may correspond to two frequency domain positions when receiving the same channel relative number, since the interval between the two frequency domain positions is large, or far greater than the frequency error range of the terminal device, the terminal device can determine the frequency domain position of the channel based on the number. In some cases, this method can save the resources required to transmit the first information.

[0158] As another implementation method, if the terminal device supports multiple frequency bands, the multiple frequency bands supported by the terminal device can be uniformly numbered, that is, the relative number of the first channel can correspond to a unique channel in the multiple frequency bands supported by the terminal device. For example, the terminal device supports band#a with a bandwidth of 35MHz near 900MHz, and band#b with a bandwidth of 40MHz near 2.4GHz. There are 7000 and 8000 ARFCN channels in these two bandwidths respectively. That is to say, the number of channels included in the frequency band supported by the terminal device is 15,000. In this case, the 15,000 channels can be uniformly numbered, such as numbered from 0 to 14999. As an example, each channel can be numbered in order from small to large according to frequency.

[0159] In addition, to indicate the above 15,000 channels, ceil[log2(15,000)]=14 bits may be required.

[0160] The above is introduced using NR-ARFCN as an example. Since the granularity of GSCN channel division is relatively large, if the above method is implemented based on the GSCN channel, the resources required for transmitting the first information may be further reduced.

[0161] It should be noted that the above method provided in the embodiment of the present application is also applicable to other scenarios such as 2.4GHz WiFi, wherein the channel division and numbering method are similar to the above, and for the sake of brevity, they will not be repeated here.

[0162] As mentioned above, the first information may indicate or include the absolute channel number of the first channel.

[0163] As an implementation, the absolute channel number can be NR-ARFCN, which corresponds to the global channel grid mentioned above. Each number can correspond to an absolute frequency domain position. Table 1 shows the correspondence between frequency and ARFCN.

[0164] Table 1

[0165] As shown in Table 1, within the three frequency ranges supported by NR, the global channel grid is divided at different granularities. NR divides frequencies below 100 GHz into 3,279,165 grid cells, numbered starting from 0, with each cell corresponding to an absolute frequency domain position.

[0166] In each frequency range, the relationship between the absolute channel number and the frequency domain position satisfies the following formula: frequency domain position = starting frequency + global frequency grid granularity × (absolute channel number - starting absolute channel number).

[0167] If the absolute channel number is used to indicate the frequency domain position of the first channel, transmitting the first information may require ceil[log2(3279165)]=22 bits of resources.

[0168] As another implementation, the absolute channel number may be GSCN. Table 2 shows the correspondence between the global synchronization number and the frequency.

[0169] Table 2

[0170] Referring to Table 2, within the 0-3000 MHz frequency band, the frequency domain position of a GSCN numbered 2 (i.e., N=1, M=1) can be 1×1200kHz+1×50kHz=1250kHz; the frequency domain position of a GSCN numbered 3 (i.e., N=1, M=3) can be 1×1200kHz+3×50kHz=1350kHz; and the frequency domain position of a GSCN numbered 4 (i.e., N=1, M=5) can be 1×1200kHz+5×50kHz=1450kHz. The frequency domain positions corresponding to other numbers can be calculated using the above method.

[0171] If GSCN is used to indicate the frequency domain position of the first channel, transmitting the first information may require ceil[log2(26639)]=15 bits of resources.

[0172] In a WiFi system, such as a 2.4 GHz WiFi system, an operating frequency band of 2.4 GHz to 2.497 GHz may be divided into 14 channels, and the absolute channel numbers may be absolute numbers corresponding to the 14 channels.

[0173] Figure 15 is an example diagram of a channel division method for a 2.4 GHz WiFi system provided in an embodiment of the present application. As shown in Figure 15 , the channels supported by the system can be divided into 14 channels, and the absolute channel numbers can be 1 to 14. In addition, Figure 15 also shows the correspondence between channel numbers and channel frequencies.

[0174] In this scenario, indicating the frequency domain position of the first channel through the above 14 absolute numbers may require ceil[log2(14)]=4 bits.

[0175] In some other embodiments, whether the first channel is numbered relative or absolute, a customized channel number may be used. For example, the bandwidth supported by the NR may be divided into a plurality of customized channels, and each channel may be numbered, or the bandwidth supported by the terminal device may be divided into a plurality of customized channels, and each channel may be numbered. As an example, the bandwidth may be divided into a plurality of channels according to a certain granularity, or the bandwidth may be divided into a plurality of channels according to a specific rule (such as a non-equally spaced manner).

[0176] Taking a terminal device supporting a 35 MHz bandwidth band near 900 MHz as an example, as an implementation method, the band can be divided into 194 channels at a granularity of 180 kHz and numbered. In this case, indicating the frequency domain position of the first channel may require ceil[log2(194)] = 8 bits. As another implementation method, the band can be divided into 97 channels at a granularity of 360 kHz. In this case, indicating the frequency domain position of the first channel may require ceil[log2(97)] = 7 bits.

[0177] The wireless communication method provided in the embodiments of the present application can be applied to terminal devices with large frequency offset errors, such as zero-power devices. By indicating the frequency domain position of the first channel, the terminal device can determine the true frequency information of the detected synchronization channel or discovery channel. Furthermore, the terminal device can determine the frequency error of the terminal device by combining the above true frequency information with the receiving frequency point set by the terminal device, thereby achieving frequency calibration and synchronization.

[0178] It should be noted that the embodiments of the present application are introduced using the synchronization channel as an example. The channel division method, channel numbering method and channel number indication method in the above embodiments are also applicable to the discovery channel or other channels.

[0179] It should be noted that the frequency data in the embodiments of the present application are only given for ease of understanding and are not representative of the center frequency, synchronization channel spacing, and frequency offset value in the actual operation of the terminal device.

[0180] The method embodiment of the present application is described in detail above in conjunction with Figures 1 to 15 . The device embodiment of the present application is described in detail below in conjunction with Figures 16 to 18 . It should be understood that the description of the method embodiment corresponds to the description of the device embodiment. Therefore, for parts not described in detail, reference can be made to the above method embodiment.

[0181] FIG16 is a schematic diagram of a terminal device according to an embodiment of the present application. The terminal device 1600 shown in FIG16 includes a receiving unit 1610 .

[0182] The receiving unit 1610 is configured to receive first information, where the first information is used to indicate a frequency domain position of a first channel; wherein the first channel is a synchronization channel or a discovery channel.

[0183] Optionally, the first information includes one or more of the following information: a frequency value of the first channel; and a channel number of the first channel.

[0184] Optionally, the frequency value of the first channel is an absolute frequency value of the first channel.

[0185] Optionally, the channel number of the first channel is a relative channel number of the first channel.

[0186] Optionally, the relative channel number is associated with one or more of the following information: the center carrier frequency of the first channel; the bandwidth supported by the terminal device; the subcarrier spacing supported by the terminal device; the channel spacing of the synchronization channel or the discovery channel; and the frequency deviation of the terminal device.

[0187] Optionally, the first channel belongs to a first channel group, and the relative channel number of the first channel is the channel number of the first channel in the first channel group.

[0188] Optionally, the number of channels included in the first channel group is greater than or equal to the number of channels included in the frequency error range of the terminal device.

[0189] Optionally, the first channel belongs to a first frequency band, and the relative channel number of the first channel is the channel number of the first channel in the first frequency band.

[0190] Optionally, the channel number of the first channel is an absolute channel number of the first channel.

[0191] Optionally, the absolute channel number corresponds to the absolute frequency of the first channel.

[0192] Optionally, the first information is carried on the first channel; or, the first information is carried on a second channel different from the first channel.

[0193] Optionally, the first information is carried in one of the following: a synchronization signal and a broadcast channel block; a beacon frame; a wake-up receiver synchronization frame; and a discovery frame.

[0194] Optionally, the first information is carried through an information field; or, the first information is carried through a reference signal sequence.

[0195] FIG17 is a schematic diagram of a network device according to an embodiment of the present application. The network device 1700 shown in FIG17 includes a sending unit 1710 .

[0196] The sending unit 1710 is configured to send first information, where the first information is used to indicate a frequency domain position of a first channel; wherein the first channel is a synchronization channel or a discovery channel.

[0197] Optionally, the first information includes one or more of the following information: a frequency value of the first channel; and a channel number of the first channel.

[0198] Optionally, the frequency value of the first channel is an absolute frequency value of the first channel.

[0199] Optionally, the channel number of the first channel is a relative channel number of the first channel.

[0200] Optionally, the relative channel number is associated with one or more of the following information: the center carrier frequency of the first channel; the bandwidth supported by the terminal device; the subcarrier spacing supported by the terminal device; the channel spacing of the synchronization channel or the discovery channel; and the frequency deviation of the terminal device.

[0201] Optionally, the first channel belongs to a first channel group, and the relative channel number of the first channel is the channel number of the first channel in the first channel group.

[0202] Optionally, the number of channels included in the first channel group is greater than or equal to the number of channels included in the frequency error range of the terminal device.

[0203] Optionally, the first channel belongs to a first frequency band, and the relative channel number of the first channel is the channel number of the first channel in the first frequency band.

[0204] Optionally, the channel number of the first channel is an absolute channel number of the first channel.

[0205] Optionally, the absolute channel number corresponds to the absolute frequency of the first channel.

[0206] Optionally, the first information is carried on the first channel; or, the first information is carried on a second channel different from the first channel.

[0207] Optionally, the first information is carried in one of the following: a synchronization signal and a broadcast channel block; a beacon frame; a wake-up receiver synchronization frame; and a discovery frame.

[0208] Optionally, the first information is carried through an information field; or, the first information is carried through a reference signal sequence.

[0209] Figure 18 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 18 indicate that the unit or module is optional. Device 1800 may be used to implement the method described in the above method embodiment. Device 1800 may be a chip, a terminal device, or a network device.

[0210] The device 1800 may include one or more processors 1810. The processor 1810 may support the device 1800 to implement the method described in the method embodiment above. The processor 1810 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0211] The apparatus 1800 may further include one or more memories 1820. The memories 1820 store programs that can be executed by the processor 1810, causing the processor 1810 to perform the methods described in the above method embodiments. The memories 1820 may be independent of the processor 1810 or integrated into the processor 1810.

[0212] The apparatus 1800 may further include a transceiver 1830. The processor 1810 may communicate with other devices or chips via the transceiver 1830. For example, the processor 1810 may transmit and receive data with other devices or chips via the transceiver 1830.

[0213] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal device or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal device or network device in each embodiment of the present application.

[0214] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal device or network device provided in the present application, and the program causes a computer to execute the method performed by the terminal device or network device in each embodiment of the present application.

[0215] The present application also provides a computer program that can be applied to a terminal device or network device provided in the present application, and enables a computer to execute the method performed by the terminal device or network device in each embodiment of the present application.

[0216] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0217] In the embodiments of this application, the term "include" can refer to direct inclusion or indirect inclusion. Alternatively, the term "include" in the embodiments of this application can be replaced with "indicates" or "is used to determine." For example, "A includes B" can be replaced with "A indicates B" or "A is used to determine B."

[0218] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0219] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0220] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0221] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0222] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0223] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0224] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0225] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0226] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0227] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0228] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0229] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, characterized in that: include: The terminal device receives first information, where the first information is used to indicate a frequency domain position of a first channel; The first channel is a synchronization channel or a discovery channel.

2. The method according to claim 1, characterized in that The first information includes one or more of the following information: The frequency value of the first channel; and The channel number of the first channel.

3. The method according to claim 2, characterized in that The frequency value of the first channel is an absolute frequency value of the first channel.

4. The method according to claim 2, characterized in that: The channel number of the first channel is a relative channel number of the first channel.

5. The method according to claim 4, characterized in that The relative channel number is associated with one or more of the following information: The center carrier frequency of the first channel; The bandwidth supported by the terminal device; The frequency bands supported by the terminal device; The subcarrier spacing supported by the terminal device; a channel spacing of a synchronization channel or a discovery channel; and The frequency deviation of the terminal device.

6. The method according to claim 4 or 5, characterized in that: The first channel belongs to a first channel group, and the relative channel number of the first channel is the channel number of the first channel in the first channel group.

7. The method according to claim 6, characterized in that The number of channels included in the first channel group is greater than or equal to the number of channels included in the frequency error range of the terminal device.

8. The method according to claim 4 or 5, characterized in that: The first channel belongs to a first frequency band, and the relative channel number of the first channel is a channel number of the first channel in the first frequency band.

9. The method according to claim 2, characterized in that: The channel number of the first channel is an absolute channel number of the first channel.

10. The method according to claim 9, characterized in that The absolute channel number corresponds to an absolute frequency of the first channel.

11. The method according to any one of claims 1 to 10, characterized in that The first information is carried on the first channel; or, the first information is carried on a second channel different from the first channel.

12. The method according to claim 11, characterized in that The first information is carried in one of the following: Synchronization signal and broadcast channel blocks; Beacon frame; wake-up receiver synchronization frame; and Discovery frame.

13. The method according to any one of claims 1 to 12, characterized in that The first information is carried via an information field; or, the first information is carried via a sequence of a reference signal.

14. A wireless communication method, characterized in that: include: The network device sends first information, where the first information is used to indicate a frequency domain position of a first channel; The first channel is a synchronization channel or a discovery channel.

15. The method according to claim 14, characterized in that The first information includes one or more of the following information: The frequency value of the first channel; and The channel number of the first channel.

16. The method according to claim 15, characterized in that The frequency value of the first channel is an absolute frequency value of the first channel.

17. The method according to claim 15, characterized in that The channel number of the first channel is a relative channel number of the first channel.

18. The method according to claim 17, characterized in that The relative channel number is associated with one or more of the following information: The center carrier frequency of the first channel; The bandwidth supported by the terminal device; The frequency bands supported by the terminal device; The subcarrier spacing supported by the terminal device; a channel spacing of a synchronization channel or a discovery channel; and The frequency deviation of the terminal device.

19. The method according to claim 17 or 18, characterized in that The first channel belongs to a first channel group, and the relative channel number of the first channel is the channel number of the first channel in the first channel group.

20. The method according to claim 19, characterized in that The number of channels included in the first channel group is greater than or equal to the number of channels included in the frequency error range of the terminal device.

21. The method according to claim 17 or 18, characterized in that The first channel belongs to a first frequency band, and the relative channel number of the first channel is a channel number of the first channel in the first frequency band.

22. The method according to claim 15, characterized in that The channel number of the first channel is an absolute channel number of the first channel.

23. The method according to claim 22, characterized in that The absolute channel number corresponds to an absolute frequency of the first channel.

24. The method according to any one of claims 14 to 23, characterized in that The first information is carried on the first channel; or, the first information is carried on a second channel different from the first channel.

25. The method according to claim 24, characterized in that The first information is carried in one of the following: Synchronization signal and broadcast channel blocks; Beacon frame; wake-up receiver synchronization frame; and Discovery frame.

26. The method according to any one of claims 14 to 25, characterized in that The first information is carried via an information field; or, the first information is carried via a sequence of a reference signal.

27. A terminal device, characterized in that: include: A receiving unit, configured to receive first information, where the first information is used to indicate a frequency domain position of a first channel; The first channel is a synchronization channel or a discovery channel.

28. The terminal device according to claim 27, characterized in that: The first information includes one or more of the following information: The frequency value of the first channel; and The channel number of the first channel.

29. The terminal device according to claim 28, characterized in that: The frequency value of the first channel is an absolute frequency value of the first channel.

30. The terminal device according to claim 28, characterized in that: The channel number of the first channel is a relative channel number of the first channel.

31. The terminal device according to claim 30, characterized in that: The relative channel number is associated with one or more of the following information: The center carrier frequency of the first channel; The bandwidth supported by the terminal device; The frequency bands supported by the terminal device; The subcarrier spacing supported by the terminal device; a channel spacing of a synchronization channel or a discovery channel; and The frequency deviation of the terminal device.

32. The terminal device according to claim 30 or 31, characterized in that: The first channel belongs to a first channel group, and the relative channel number of the first channel is the channel number of the first channel in the first channel group.

33. The terminal device according to claim 32, characterized in that: The number of channels included in the first channel group is greater than or equal to the number of channels included in the frequency error range of the terminal device.

34. The terminal device according to claim 30 or 31, characterized in that: The first channel belongs to a first frequency band, and the relative channel number of the first channel is a channel number of the first channel in the first frequency band.

35. The terminal device according to claim 28, characterized in that: The channel number of the first channel is an absolute channel number of the first channel.

36. The terminal device according to claim 35, characterized in that: The absolute channel number corresponds to an absolute frequency of the first channel.

37. The terminal device according to any one of claims 27 to 36, characterized in that: The first information is carried on the first channel; or, the first information is carried on a second channel different from the first channel.

38. The terminal device according to claim 37, characterized in that: The first information is carried in one of the following: Synchronization signal and broadcast channel blocks; Beacon frame; wake-up receiver synchronization frame; and Discovery frame.

39. The terminal device according to any one of claims 27-38, characterized in that: The first information is carried via an information field; or, the first information is carried via a sequence of a reference signal.

40. A network device, characterized in that: include: A sending unit, configured to send first information, where the first information is used to indicate a frequency domain position of a first channel; The first channel is a synchronization channel or a discovery channel.

41. The network device according to claim 40, characterized in that The first information includes one or more of the following information: The frequency value of the first channel; and The channel number of the first channel.

42. The network device according to claim 41, characterized in that The frequency value of the first channel is an absolute frequency value of the first channel.

43. The network device according to claim 41, characterized in that The channel number of the first channel is a relative channel number of the first channel.

44. The network device according to claim 43, characterized in that The relative channel number is associated with one or more of the following information: The center carrier frequency of the first channel; The bandwidth supported by the terminal device; The frequency bands supported by the terminal device; The subcarrier spacing supported by the terminal device; a channel spacing of a synchronization channel or a discovery channel; and The frequency deviation of the terminal device.

45. The network device according to claim 43 or 44, characterized in that: The first channel belongs to a first channel group, and the relative channel number of the first channel is the channel number of the first channel in the first channel group.

46. ​​The network device according to claim 45, characterized in that The number of channels included in the first channel group is greater than or equal to the number of channels included in the frequency error range of the network device.

47. The network device according to claim 43 or 44, characterized in that: The first channel belongs to a first frequency band, and the relative channel number of the first channel is a channel number of the first channel in the first frequency band.

48. The network device according to claim 41, characterized in that The channel number of the first channel is an absolute channel number of the first channel.

49. The network device according to claim 48, characterized in that The absolute channel number corresponds to an absolute frequency of the first channel.

50. The network device according to any one of claims 40 to 49, characterized in that: The first information is carried on the first channel; or, the first information is carried on a second channel different from the first channel.

51. The network device according to claim 50, characterized in that The first information is carried in one of the following: Synchronization signal and broadcast channel blocks; Beacon frame; wake-up receiver synchronization frame; and Discovery frame.

52. The network device according to any one of claims 40 to 51, characterized in that: The first information is carried via an information field; or, the first information is carried via a sequence of a reference signal.

53. A terminal device, characterized in that: The invention comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory to execute the method according to any one of claims 1 to 13.

54. A network device, characterized in that: The invention comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory to execute the method according to any one of claims 14 to 26.

55. A terminal device, characterized in that: The invention comprises a processor, which is used to call a program from a memory to execute the method according to any one of claims 1 to 13.

56. A network device, characterized in that: The method comprises a processor for calling a program from a memory to execute a method as claimed in any one of claims 14 to 26.

57. A chip, characterized in that: It comprises a processor, which is used to call a program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 13.

58. A chip, characterized in that: It comprises a processor, which is used to call a program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 14 to 26.

59. A computer-readable storage medium, characterized in that A program is stored thereon, and the program enables a computer to execute the method according to any one of claims 1 to 13.

60. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method according to any one of claims 14 to 26.

61. A computer program product, characterized in that The method comprises a program which causes a computer to execute the method according to any one of claims 1 to 13.

62. A computer program product, characterized in that The method comprises a program which causes a computer to execute the method according to any one of claims 14 to 26.

63. A computer program, characterized in that The computer program enables a computer to execute the method according to any one of claims 1 to 13.

64. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 14-26.

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