Wireless communication method, terminal device and network device

Abstract

Provided are a wireless communication method, a terminal device and a network device. The method comprises: a terminal device receiving first information sent by a network device, wherein the first information is used for indicating that the terminal device receives or sends a first synchronization signal, synchronization based on the first synchronization signal being associated with synchronization based on a second synchronization signal, and the second synchronization signal and the first synchronization signal being different types of synchronization signals. The present application provides two different types of synchronization signals, namely, a first synchronization signal and a second synchronization signal. Synchronization based on the first synchronization signal is associated with synchronization based on the second synchronization signal. A network device can indicate, by means of first information, that a terminal device receives or sends the first synchronization signal, such that on the basis of the synchronization based on the second synchronization signal, the terminal device further obtains more accurate synchronization information on the basis of the first synchronization signal, thereby improving the synchronization accuracy.

Description

Wireless communication methods, terminal devices, and network devices Technical Field

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

[0002] The synchronization process of terminal devices plays a crucial role in wireless communication, ensuring that they correctly receive downlink data from the base station and maintaining the stability of the communication link. Therefore, it is necessary to improve the synchronization accuracy of terminal devices. Summary of the Invention

[0003] This application provides a wireless communication method, terminal device, and network device. The various aspects covered by this application are described below.

[0004] In a first aspect, a wireless communication method is provided, comprising: a terminal device receiving first information sent by a network device, the first information being used to instruct the terminal device to receive or send a first synchronization signal; wherein synchronization based on the first synchronization signal is associated with synchronization based on a second synchronization signal, the second synchronization signal and the first synchronization signal being synchronization signals of different types.

[0005] In a second aspect, a wireless communication method is provided, comprising: a network device sending first information to a terminal device, the first information being used to instruct the terminal device to receive or send a first synchronization signal; wherein synchronization based on the first synchronization signal is associated with synchronization based on a second synchronization signal, the second synchronization signal and the first synchronization signal being synchronization signals of different types.

[0006] Thirdly, a terminal device is provided, comprising: receiving first information sent by a network device, the first information being used to instruct the terminal device to receive or send a first synchronization signal; wherein, synchronization based on the first synchronization signal is associated with synchronization based on a second synchronization signal, the second synchronization signal and the first synchronization signal being synchronization signals of different types.

[0007] Fourthly, a network device is provided, comprising: sending first information to a terminal device, the first information being used to instruct the terminal device to receive or send a first synchronization signal; wherein synchronization based on the first synchronization signal is associated with synchronization based on a second synchronization signal, the second synchronization signal and the first synchronization signal being synchronization signals of different types.

[0008] Fifthly, a terminal device is provided, including a transceiver, a memory, and a processor, wherein the memory is used to store a program, and the processor is used to invoke the program in the memory and control the transceiver to receive or send signals so that the terminal device performs the method as described in the first aspect.

[0009] In a sixth aspect, a network device is provided, including a transceiver, a memory, and a processor, wherein the memory is used to store a program, and the processor is used to invoke the program in the memory and control the transceiver to receive or transmit signals so that the network device performs the method as described in the second aspect.

[0010] A seventh aspect provides an apparatus including a processor for calling a program from a memory to cause the apparatus to perform the method as described in any one of the first or second aspects.

[0011] Eighthly, a chip is provided, including a processor for calling a program from memory to cause a device having the chip mounted to perform the method as described in the first or second aspect.

[0012] Ninth aspect, a computer-readable storage medium is provided having a program stored thereon that causes a computer to perform the method as described in the first or second aspect.

[0013] A tenth aspect provides a computer program product, including a program that causes a computer to perform the method as described in the first or second aspect.

[0014] Eleventhly, a computer program is provided that causes a computer to perform the method as described in the first or second aspect.

[0015] In this embodiment of the application, two different types of synchronization signals are provided, namely a first synchronization signal and a second synchronization signal. Synchronization based on the first synchronization signal is associated with synchronization based on the second synchronization signal. The network device can instruct the terminal device to receive or send the first synchronization signal through the first information, so that the terminal device can obtain more accurate synchronization information based on the first synchronization signal on the basis of synchronization based on the second synchronization signal, thereby improving the synchronization accuracy. Attached Figure Description

[0016] Figure 1 is a system architecture example diagram of a wireless communication system applicable to embodiments of this application.

[0017] Figure 2 is a schematic flowchart of OFDM processing.

[0018] Figure 3 is a flowchart illustrating the wireless communication method according to an embodiment of this application.

[0019] Figure 4 is a schematic diagram of the downlink synchronization process according to an embodiment of this application.

[0020] Figure 5 is a schematic diagram of the direction corresponding to the SSB index.

[0021] Figure 6 is a schematic diagram of the structure of the terminal device according to an embodiment of this application.

[0022] Figure 7 is a schematic diagram of the structure of a network device according to an embodiment of this application.

[0023] Figure 8 is a schematic diagram of a communication apparatus according to an embodiment of this application. Detailed Implementation

[0024] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0025] Wireless communication system

[0026] Figure 1 is an example diagram of the system architecture of a wireless communication system 100 to which embodiments of this application can be applied. The wireless communication system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 can provide network coverage for a specific geographical area and can communicate with the terminal device 120 located within that coverage area. The terminal device 120 can access a network, such as a wireless network, through the network device 110. Optionally, the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity; this embodiment of the application does not limit this.

[0027] It should be understood that the technical solutions of the embodiments of this application can be applied to various communication systems, such as: fifth generation (5G) systems, new radio (NR), long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, etc. The technical solutions provided in this application can also be applied to future communication systems, such as sixth generation mobile communication systems, satellite communication systems, etc.

[0028] In this application embodiment, the terminal device 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, wireless communication device, user agent, or user apparatus. The terminal device in this application embodiment can 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 a handheld device with wireless connectivity, vehicle-mounted device, etc. Terminal devices can also be mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, self-driving, remote medical surgery, smart grids, transportation safety, smart cities, and smart homes. Optionally, terminal devices can act as base stations. For example, a terminal device can act as a dispatching entity, providing sidelink signals between terminal devices in vehicle-to-everything (V2X) or device-to-device (D2D) systems. For instance, cellular phones and cars communicate with each other using sidelink signals. Cellular phones and smart home devices communicate without relaying communication signals through base stations.

[0029] In this embodiment, the network device can be a device used to communicate with a terminal device. The network device can be an access network device or a wireless access network device. For example, the network device can be a base station. The term "base station" can broadly encompass various names as follows, or can be replaced by names such as: NodeB, evolved NodeB (eNB), next-generation NodeB (gNB), relay station, transmitting and receiving point (TRP), transmitting point (TP), master station (MeNB), secondary station (SeNB), multi-mode 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, micro base station, relay node, donor node, or similar entity, or a combination thereof. A base station can also refer to a communication module, modem, or chip installed within the aforementioned equipment or apparatus. A base station can also be a mobile switching center, or an entity 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 an entity that performs base station functions in future communication systems. A base station can support networks using the same or different access technologies. The embodiments of this application do not limit the specific technologies or device forms used in the network equipment.

[0030] Furthermore, base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move depending on the location of the mobile base station. In other examples, a helicopter or drone can be configured as a device to communicate with another base station.

[0031] Network devices and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and satellites. This application does not limit the scenario in which the network devices and terminal devices are located.

[0032] It should be understood that all or part of the functions of the communication device in this application can also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform such as a cloud platform.

[0033] OFDM

[0034] From 2G's Time Division Multiple Access (TDMA) and 3G's Code Division Multiple Access (CDMA) to 4G / 5G's Orthogonal Frequency Division Multiple Access (OFDMA) and Discrete Fourier Transform Spread-Orthogonal Frequency Division Multiple Access (DFT-S-OFDMA), the design of multiple access methods (or waveform design) has always been the core of wireless communication systems. To meet the needs of multi-user communication, the system needs to generate a series of mutually orthogonal transmitted waveforms to effectively transmit information-carrying symbols through the propagation channel. OFDM can convert frequency-selective channels into parallel frequency-flat sub-channels through multi-carrier transmission, thereby effectively reducing inter-symbol interference (ISI) and enabling flexible allocation of time and frequency resources. However, OFDM also has some practical problems, such as peak-to-average power ratio and severe Doppler shift in high-speed mobile scenarios. In the LTE uplink, DFT-s-OFDM is used to reduce PAPR, but this increases implementation complexity and reduces system performance.

[0035] Despite some drawbacks, OFDM's numerous advantages have led to its adoption in 4G and its continued use in 5G. OFDM divides transmitted data into multiple sub-channels (or subcarriers) for parallel transmission. Each subcarrier carries a portion of the data at a low rate, and the orthogonality between subcarriers reduces interference during wideband transmission. Subcarrier spectral overlap fully utilizes subcarrier resources, improving spectral efficiency. Furthermore, inter-symbol interference caused by multipath propagation in OFDM systems can be mitigated by inserting guard intervals (e.g., cyclic prefixes, CP). Since signal detection and channel estimation in OFDM systems only require simple gain adjustments to each subcarrier in the frequency domain, eliminating the need for complex time-domain equalizers, OFDM can be easily combined with other technologies, such as multiple-input multiple-output (MIMO), to further improve system performance.

[0036] As an example, Figure 2 illustrates the OFDM processing procedure, in which the signal to be transmitted is mapped onto each subcarrier, and the frequency domain signal A on each subcarrier is transformed using an inverse fast Fourier transform (IFFT). k Convert to time domain signal a n Where n ranges from 0 to N-1, this process can be implemented, for example, based on the following formula:

[0037] After that, signal a n After further processing such as parallel-to-serial conversion and digital-to-analog conversion (D / A), the time-domain signal a(t) is obtained.

[0038] Doppler shift

[0039] Doppler shift is the change in signal frequency caused by the relative motion between the transmitter and receiver, and can be expressed by the following formula:

[0040] Where Δf is the frequency shift, v is the relative velocity (positive value indicates moving away, negative value indicates moving closer), c is the speed of light, and f is the carrier frequency of the signal (also known as the carrier frequency).

[0041] When the transmitter and receiver move away from each other, the frequency of the signal received by the receiver decreases. When they move closer together, the frequency of the signal received by the receiver increases. Frequency drift introduces frequency deviation, affecting frequency synchronization, especially in high-speed communications (e.g., high-speed trains or satellite communications). The Doppler effect accelerates changes in channel state, affecting the accuracy of channel estimation. In technologies such as OFDM, the Doppler effect can lead to inter-carrier interference, affecting signal demodulation.

[0042] Doppler shift causes frequency offset and phase drift, affecting the synchronization performance of the receiver. Especially in high-speed moving scenarios, frequency offset can lead to carrier frequency deviation, making proper demodulation difficult. Due to time synchronization errors caused by frequency offset, the signal start point is difficult to capture. Relative motion between the transmitter and receiver results in significant Doppler shift, requiring a frequency compensation mechanism to maintain synchronization. In high-speed rail or V2X communication, the Doppler effect caused by high-speed movement necessitates real-time frequency adjustment to maintain communication quality. High-density device access and frequency offset in dynamic scenarios place higher demands on synchronization algorithms. Through effective synchronization and Doppler shift compensation, communication systems can maintain efficient and reliable transmission in high-speed moving and variable channel environments.

[0043] Delayed Doppler waveform

[0044] There are various types of time-delay Doppler waveforms, among which the orthogonal time-frequency space (OTFS) technique performs well in the time-delay Doppler domain. The main advantage of OTFS over traditional OFDM receivers lies in distance estimation in high-speed mobile scenarios. For traditional OFDM receivers, multipath effects and Doppler shift in high-speed scenarios lead to the loss of orthogonality between subcarriers, causing frequency offset correction algorithms in traditional OFDM receivers to fail. OTFS uses two-dimensional orthogonal basis functions in the time-delay Doppler domain to combat the dynamic characteristics of time-varying multipath channels, transforming fading, time-varying multipath channels into sparse, slowly varying time-varying channels. Therefore, as long as the highest Doppler shift is less than the subcarrier spacing, the frequency offset problem can be solved. For low-speed scenarios, the Doppler shift is close to zero, and synchronization and channel estimation parameters are mainly located in the time-delay channel. Traditional OFDM receivers have good estimation performance for time-delay channels unaffected by Doppler shift. In this case, the time delay estimation results of OTFS and OFDM are equivalent in specific scenarios, and their performance is similar. Therefore, in high-speed scenarios, OTFS can estimate higher Doppler frequency shifts, showing its advantage over OFDM.

[0045] Taking downlink synchronization as an example, during downlink synchronization, the terminal device first detects the primary synchronization signal to obtain time synchronization information, and then detects the secondary synchronization signal to obtain precise time and frequency synchronization, as well as complete cell identification (ID) information. However, with the development of communication technology, relying solely on a single type of synchronization signal to achieve downlink synchronization may not meet the needs of terminal devices. Therefore, it is necessary to introduce other types of synchronization signals to improve the accuracy of downlink synchronization of terminal devices.

[0046] This application provides two different types of synchronization signals, namely a first synchronization signal and a second synchronization signal. Synchronization based on the first synchronization signal is associated with synchronization based on the second synchronization signal. The network device can instruct the terminal device to receive or send the first synchronization signal through the first information, so that the terminal device can obtain more accurate synchronization information based on the first synchronization signal on the basis of synchronization based on the second synchronization signal, thereby improving the synchronization accuracy.

[0047] This application does not limit the types of the first synchronization signal and the second synchronization signal. For example, the synchronization accuracy based on the first synchronization signal can be higher than that based on the second synchronization signal. When higher synchronization accuracy is required, the network device can instruct the terminal device to synchronize based on the first synchronization signal; when lower synchronization accuracy is required, the terminal device can synchronize based on the second synchronization signal.

[0048] In some implementations, the first synchronization signal and the second synchronization signal can be two types of synchronization signals with different signal modulation methods. For example, the first synchronization signal is obtained based on a first signal modulation method, and the second synchronization signal is obtained based on a second signal modulation method; the first signal modulation method and the second signal modulation method are different. The signal modulation method in this application embodiment refers, for example, to a multi-carrier modulation method. The term "modulation" in this application embodiment should be broadly understood as a "processing" of a signal.

[0049] As an example, the first synchronization signal can be a synchronization signal obtained based on a modulation method other than OFDM. For example, the first synchronization signal can be a synchronization signal obtained based on OTFS modulation or other time-delay Doppler modulation methods; the second synchronization signal can be a synchronization signal obtained based on OFDM or other time-frequency domain signal modulation methods. In this case, the first synchronization signal and the second synchronization signal can also be regarded as two types of synchronization signals with different multiple access methods; or, the first synchronization signal and the second synchronization signal can be regarded as two types of synchronization signals with different waveforms.

[0050] Furthermore, the first synchronization signal and the second synchronization signal can also be two types of synchronization signals with different subcarrier spacings. For example, the subcarrier spacing of the first synchronization signal is greater than that of the second synchronization signal. A larger subcarrier spacing allows for the detection of a higher Doppler frequency shift during synchronization; therefore, synchronization based on a larger subcarrier spacing allows for a more accurate estimation of the Doppler frequency shift.

[0051] Alternatively, the first synchronization signal and the second synchronization signal can be two types of synchronization signals with different frame structures. For example, the frame structure of the first synchronization signal can use longer symbols, or eliminate the cyclic prefix to obtain better sequence autocorrelation, so that the terminal device can obtain better time-domain resolution when synchronizing, thereby improving synchronization accuracy.

[0052] The embodiments of this application will be described in detail below with reference to Figure 3.

[0053] Figure 3 is a schematic flowchart of a wireless communication method provided in an embodiment of this application. The method 300 shown in Figure 3 can be executed by a terminal device and a network device. The terminal device can be, for example, the terminal device 120 shown in Figure 1, and the network device can be, for example, the network device 110 shown in Figure 1.

[0054] Referring to Figure 3, in step 310, the network device sends the first information to the terminal device.

[0055] Accordingly, in step 320, the terminal device receives the first information sent by the network device.

[0056] The first information is used to instruct the terminal device to receive or send a first synchronization signal. Synchronization based on the first synchronization signal is associated with synchronization based on the second synchronization signal; in other words, the synchronization process associated with the second synchronization signal may depend on the result of the synchronization process associated with the first synchronization signal. The first synchronization signal can be used for downlink synchronization and / or uplink synchronization of the terminal device, and the second synchronization signal can be used for downlink synchronization and / or uplink synchronization of the terminal device. For example, for downlink synchronization, the first synchronization signal and / or the second synchronization signal may include a primary synchronization signal (PSS) and / or a secondary synchronization signal (SSS), etc.; as another example, for uplink synchronization, the first synchronization signal and / or the second synchronization signal may include a random access preamble. Hereinafter, the technical solutions of the embodiments of this application will be described using the first and second synchronization signals for downlink synchronization as an example.

[0057] In this way, in addition to the transmission of the second synchronization signal within the cell, in certain special scenarios, network devices can also send a first synchronization signal and instruct terminal devices to receive or send the first synchronization signal via first information, thereby improving the synchronization performance of terminal devices. For example, the first synchronization signal can be a synchronization signal obtained based on time delay Doppler (e.g., OTFS) processing, and the second synchronization signal can be a synchronization signal obtained based on OFDM processing. Based on synchronization based on the OFDM synchronization signal, the terminal device can further perform synchronization based on the OTFS synchronization signal, thereby improving synchronization accuracy.

[0058] By introducing a first synchronization signal transmitted in the time-delay Doppler domain, the terminal device can improve the resolution of the first synchronization signal through multi-dimensional processing after performing two-dimensional detection on the first synchronization signal. This provides higher-precision measurement results for subsequent high-speed data, high-order modulation, high-speed mobile scenarios, and more refined sensing and measurement. Furthermore, when synchronizing based on the first synchronization signal, the results of synchronization based on the second synchronization signal can be utilized.

[0059] Taking downlink synchronization as an example, when a terminal device initially accesses the network, it typically has no information and needs to smoothly scan the data within a cycle. Although there are fast algorithms, their complexity remains high due to the large amount of data processed. Furthermore, in 5G scenarios, due to limitations in device processing capabilities, synchronization signals are transmitted via beam scanning. In some cases, a single synchronization signal block burst (SSB burst) from a network device can contain 64 beams, transmitted at different times and in different directions. Users need to detect each of these beams individually during synchronization detection. If the terminal device performs receive beam scanning, the detection complexity increases exponentially with the number of beams. For example, if there are 64 transmit beams and 32 receive beams, then 64*32 initial search synchronizations are required. The complexity of OTFS itself remains high. With OTFS, the receiver, without knowing the channel information, does not know where to receive the target. Peaks can be found at corresponding locations for blind OTFS detection. However, this introduces additional complexity; the algorithm complexity of OTFS transformation is typically several times that of traditional OFDM receivers, significantly impacting synchronization detection efficiency. Therefore, based on downlink synchronization using the first synchronization signal, the terminal device can know approximately where to receive the second synchronization signal, thereby reducing the complexity of downlink synchronization based on the second synchronization signal and improving synchronization accuracy without introducing a large amount of computation.

[0060] During downlink synchronization, the terminal device first detects the primary synchronization signal to obtain time synchronization information, and then detects the secondary synchronization signal to obtain fine-grained time and frequency synchronization, as well as complete cell ID information. Therefore, when obtaining the initial synchronization information, the OFDM synchronization signal is retained. During synchronization signal detection, the synchronization signal beam is obtained, and if there is further beam scanning, the direction of the received beam is recorded.

[0061] Given that existing standards are based on OFDM, designing a new system standard entirely independent of OFDM would result in massive engineering challenges. Furthermore, such a approach would significantly impact the industry landscape. This application, however, builds upon the existing OFDM framework by introducing other multiple access methods to address OFDM's shortcomings, thus designing a scheme where multiple multiple access methods coexist, leveraging their respective strengths to adapt the system to various scenarios. In future wireless communication systems, in addition to supporting current high-speed data communication, high reliability and low latency, and massive connectivity, it is also necessary to support integrated sensing and communication (ISAC), air-space-ground integration, and integrated artificial intelligence and communication. These scenarios require utilizing the advantages of various multiple access waveforms. Therefore, this application proposes a method where multiple multiple access methods (or waveforms) coexist to better support different needs in various future scenarios. Moreover, the coexistence of multiple access methods (or waveforms) is more conducive to leveraging the advantages of time-delay Doppler domain signal processing, allowing for more accurate estimation of Doppler frequency shift without introducing excessive computational complexity.

[0062] As an example, the downlink synchronization process is shown in Figure 4. In step 410, the terminal device first receives the primary synchronization information from the second synchronization signal and obtains coarse time synchronization information. Next, in step 420, the terminal device receives the secondary synchronization information from the second synchronization signal and obtains fine time synchronization information. Finally, in step 430, the terminal device receives the first synchronization signal, thereby obtaining fine-to-fine time synchronization information. Here, fine-to-fine synchronization means that the synchronization accuracy obtained in step 430 is higher than the synchronization accuracy obtained in step 420.

[0063] As shown in Figure 4, before performing downlink synchronization based on the first synchronization signal in step 430, downlink synchronization is first performed based on the second synchronization signal in steps 410 and 420. This is to reduce the high computational load generated when performing downlink synchronization based solely on the second synchronization signal, thereby improving the accuracy of downlink synchronization without increasing the complexity of the terminal equipment.

[0064] If the terminal device does not require high synchronization accuracy, for example, in a low-speed moving scenario, then only steps 410 and 420 need to be executed; that is, the terminal device completes the downlink synchronization part from steps 410 to 420. If the terminal device requires high synchronization accuracy, for example, in a high-speed moving scenario, then synchronization detection based on signal modulation methods other than OFDM is also required. In this case, steps 410 to 430 are used to achieve more accurate downlink synchronization.

[0065] When the terminal device needs to achieve more precise downlink synchronization through steps 410 to 430, in some implementations, the time-domain position of the first synchronization signal can be determined by its time-domain position relative to the second synchronization signal. For example, there may be a specific frequency offset between the time-domain position of the second synchronization signal and the time-domain position of the first synchronization signal. This frequency offset information can be pre-agreed or indicated by the network device. Alternatively, the time-domain position of the first synchronization signal can be the next time-domain position used for transmitting the synchronization signal after the time-domain position of the second synchronization signal. That is, after the terminal device detects the second synchronization signal at a certain time-domain position used for transmitting the synchronization signal, it can detect the first synchronization signal at the next time-domain position used for transmitting the synchronization signal. In this case, the first synchronization signal and the second synchronization signal can also be regarded as a synchronization signal block formed by merging.

[0066] In some implementations, the frequency domain position of the first synchronization signal can be adjacent to the frequency domain position of the second synchronization signal. For example, the frequency position corresponding to the first synchronization signal and / or the first signal modulation method is located at the high-frequency end or low-frequency end of a certain frequency band, and is adjacent to the frequency band corresponding to the second synchronization signal and / or the second signal modulation method. This is beneficial for network equipment to schedule resources and is also suitable for small-bandwidth transmission such as narrowband Internet of Things (NB-IoT).

[0067] When the second synchronization signal is a downlink synchronization signal, the network device can send the second synchronization signal and / or the physical broadcast channel (PBCH) to the terminal device, and the terminal device receives the second synchronization signal and / or the PBCH accordingly. In some implementations, the time domain position of the second synchronization signal can be before the time domain position of the first synchronization signal, and the time domain position of the PBCH can be between or after the time domain positions of the second and first synchronization signals. For example, as shown in Figure 4, the terminal device can perform PBCH detection (e.g., OFDM-based PBCH) after step 420; or, the terminal device can also perform PBCH detection (e.g., OFDM-based PBCH) after step 430. In this case, since more precise synchronization has been performed based on the first synchronization signal, a higher modulation order can be used for the PBCH, allowing for the carrying of master information block (MIB) information at a more efficient coding rate.

[0068] In some implementations, the first information can be carried in a second synchronization signal (e.g., a primary synchronization signal (or primary synchronization sequence) or a secondary synchronization signal (or secondary synchronization sequence)), a PBCH associated with the second synchronization signal, a MIB associated with the second synchronization signal, or a system information block (SIB1) associated with the second synchronization signal. In this way, after receiving the second synchronization signal, it can be determined whether the first synchronization signal still needs to be received or transmitted to obtain more accurate synchronization information.

[0069] In some implementations, the network device can send second information to the terminal device; correspondingly, the terminal device receives the second information sent by the network device. The second information is used to instruct the terminal device to report its capability information. This capability information is used to determine whether to transmit the first synchronization signal. If the terminal device has the corresponding capability, the network device can instruct the terminal device to receive or send the first synchronization signal through the first information.

[0070] For example, the capability information of a terminal device may indicate one or more of the following: the ability to support high-order modulation; the ability to support high code rates; support for a first synchronization signal; and support for a first signal modulation scheme. Typically, high-order modulation can be used to improve the spectral efficiency of data transmission. For high-order modulation or high code rates, the terminal device requires higher synchronization accuracy, thus requiring synchronization based on the first synchronization signal. When the terminal device supports the detection of the first synchronization signal or supports the first signal modulation scheme (e.g., OTFS), the network device can also consider, based on the actual scenario, whether to instruct the terminal device to receive or transmit the first synchronization signal to improve the synchronization accuracy of the terminal device.

[0071] In some implementations, the second information can be carried in the uplink random access procedure message of the terminal device, for example, in message MSG2 during the uplink random access procedure. In some implementations, capability information can also be carried in the uplink random access procedure message of the terminal device, for example, in message MSG3 during the uplink random access procedure. After synchronization between the terminal device and the network device based on the second synchronization signal, the terminal device can inform the network device through the uplink random access procedure whether it possesses the aforementioned capabilities. The network device can then determine, based on the capabilities reported by the terminal device, whether the terminal device needs to re-receive or retransmit the first synchronization signal for further synchronization, thereby improving synchronization accuracy.

[0072] Network devices can instruct terminal devices to receive or send a first synchronization signal via a second synchronization signal or other signals associated with the second synchronization signal (e.g., SIB1) during the initial synchronization process (or initial access). After achieving more accurate synchronization based on the first synchronization signal, the terminal device then performs data communication with the network device. In other words, a capability information reporting process is unnecessary. In this case, the network device can schedule uplink and downlink data with high-order modulation or high bit rate. It's understandable that the aforementioned capability reporting process may not be necessary in this scenario, provided the network device already knows that the terminal device possesses high-order modulation or high bit rate capabilities. For example, the network device may assume that the terminal device (e.g., all terminal devices used within the cell) has high-order modulation or high bit rate capabilities.

[0073] In some implementations, the first synchronization signal and the second synchronization signal are associated with different physical random access channel opportunities (ROs). For example, the PSS in the first synchronization signal and the PSS in the second synchronization signal are associated with different ROs, or the SSS in the first synchronization signal and the SSS in the second synchronization signal are associated with different ROs. When the terminal device possesses the aforementioned capabilities (e.g., the ability to support high-order modulation, the ability to support high code rates, the ability to support the first synchronization signal, or the ability to support the first signal modulation method), the terminal device can transmit a physical random access channel (PRACH) on the RO associated with the first synchronization signal; correspondingly, when the network device receives the physical random access channel (PRACH) transmitted by the terminal device on the RO associated with the first synchronization signal, it can be considered that the terminal device possesses the aforementioned capabilities. When the terminal device does not possess these capabilities, the terminal device can transmit a PRACH on the RO associated with the second synchronization signal; correspondingly, when the network device receives the PRACH transmitted by the terminal device on the RO associated with the second synchronization signal, it can be considered that the terminal device does not possess the aforementioned capabilities. Here, the ROs associated with the first synchronization signal and the ROs associated with the second synchronization signal are different. Through this implicit instruction method, terminal devices can also report their capability information while saving signaling overhead.

[0074] In some implementations, the first synchronization signal and the second synchronization signal are associated with different random access preambles. When the terminal device possesses the aforementioned capabilities (e.g., support for high-order modulation, support for high code rates, support for the first synchronization signal, or support for the first signal modulation scheme), the terminal device needs to select the preambles associated with the first synchronization signal when transmitting preambles during uplink random access. When the terminal device lacks these capabilities, it needs to select the preambles associated with the second synchronization signal when transmitting preambles during uplink random access. The preambles associated with the first synchronization signal and the second synchronization signal are different. This allows the terminal device to report its capability information while saving signaling overhead.

[0075] In some implementations, the first synchronization signal and the second synchronization signal are associated with different frequency bands, or the first signal modulation method and the second signal modulation method are associated with different frequency bands. The terminal device needs to receive the second synchronization signal in the frequency band associated with the second synchronization signal, and receive or transmit the first synchronization signal in the frequency band associated with the first synchronization signal.

[0076] For example, if certain frequency bands support a first synchronization signal and / or a first signal modulation method (or in other words, these frequency bands can have non-OFDM waveforms), then the first synchronization signal can be transmitted on these frequency bands. Conversely, if certain frequency bands do not support a first synchronization signal and / or a first signal modulation method (or in other words, these frequency bands cannot have non-OFDM waveforms), then the first synchronization signal cannot be transmitted on these frequency bands. For instance, if the frequency band is shared by 5G and 6G, non-OFDM waveforms may not be supported in order to better coexist between 6G and 5G systems. Similarly, if certain frequency bands support a second synchronization signal and / or a second signal modulation method, then the second synchronization signal can be transmitted on these frequency bands. Furthermore, if certain frequency bands simultaneously support both the first and second synchronization signals, or simultaneously support both the first and second signal modulation methods, then both the first and second synchronization signals can be transmitted on these frequency bands.

[0077] Furthermore, the frequency location for transmitting the first synchronization signal can be agreed upon or indicated by network devices. For example, the first signal modulation method is associated with a first frequency band, i.e., the first frequency band is a band used for transmitting non-OFDM waveforms. Further, the first frequency band includes sub-frequency bands supporting the first signal modulation method, i.e., non-OFDM waveforms are transmitted within these sub-frequency bands of the first frequency band. These sub-frequency bands supporting the first signal modulation method may, for example, include: sub-frequency bands near the high-frequency end of the first frequency band; and / or, sub-frequency bands near the low-frequency end of the first frequency band. If the first synchronization signal is transmitted at the high-frequency end or low-frequency end of a frequency band, when the adjacent frequency band is an OFDM band, OFDM resource scheduling can be more convenient, and it is also beneficial for estimating the synchronization information of the OFDM band.

[0078] For example, the first synchronization signal is associated with the second frequency band, meaning the first frequency band is used to transmit the first synchronization signal. Further, the second frequency band includes a sub-frequency band supporting the first synchronization signal, meaning the first synchronization signal is transmitted within this sub-frequency band of the second frequency band. This sub-frequency band supporting the first synchronization signal in the second frequency band may include, for example, one or more of the following: a sub-frequency band near the high-frequency end of the second frequency band; a sub-frequency band near the low-frequency end of the second frequency band; an intermediate frequency band between the high-frequency and low-frequency bands; or a sub-frequency band closer to the third frequency band between the high-frequency and low-frequency bands. The third frequency band is the frequency band supporting the second signal modulation method and / or the second synchronization signal.

[0079] In some implementations, the first information can also be used to indicate relevant information about the first synchronization signal to help the terminal device better receive or transmit the first synchronization signal. The relevant information about the first synchronization signal includes, for example, one or more of the following: time-domain information of the first synchronization signal; frequency-domain information of the first synchronization signal; resource information of the pilot signals associated with the first synchronization signal (e.g., PSS, SSS, demodulation reference signal (DMRS), channel state information-reference signal (CSI-RS)); the synchronous signal broadcast channel block (SSB) index associated with the first synchronization signal; and the subcarrier spacing associated with the first synchronization signal. By carrying the relevant information about the first synchronization signal in the first information, the network device can help the terminal device receive or transmit the first synchronization signal on appropriate resources. The first information can be carried in the second synchronization signal or information associated with the second synchronization signal.

[0080] As an example, the time-domain and / or frequency-domain resources of the first synchronization signal and / or its associated pilot signal can be indicated by the SIB1 associated with the second synchronization signal. For a cell-defined SSB, the terminal device can determine the time-frequency position of the first synchronization signal and / or its associated pilot signal based on the indication of the SIB1 by detecting the SIB1 corresponding to the cell-defined SSB.

[0081] For downlink synchronization, when the first synchronization signal and the second synchronization signal coexist, since the second synchronization signal is transmitted in the form of beam scanning, in a practical system, precise downlink synchronization is only required in specific directions, and may not be necessary in other directions. For example, as shown in Figure 5, a base station deployed along a highway covers the highway on one side and farmland on the other. Precise downlink synchronization is required in the highway direction, but not in the farmland direction. In this case, only certain SSB indices (i.e., SSB indices transmitted on the highway side) require corresponding first synchronization signals, while others (i.e., SSB indices transmitted on the farmland side) do not. Therefore, when the first synchronization signal and the second synchronization signal coexist, the first synchronization signal can be transmitted only in the directions corresponding to some SSB indices, and this information needs to be communicated to the terminal equipment.

[0082] For example, in some implementations, the first synchronization signal is associated with an SSB index, and the SSB index associated with the first synchronization signal is carried in the PBCH or MIB associated with the second synchronization signal, or the SSB index associated with the first synchronization signal is carried in broadcast signaling. That is, the SSB index corresponding to the direction of the first synchronization signal can be indicated by the PBCH / MIB associated with the second synchronization signal or by broadcast signaling.

[0083] As an example, the PBCH or MIB associated with the second synchronization signal includes an indicator bit used to indicate whether a first synchronization signal exists in the direction corresponding to its associated SSB index. The value of this indicator bit in the corresponding PBCH or MIB can be different for different SSB indices; that is, each indicator bit only indicates whether a first synchronization signal exists in the direction corresponding to its corresponding SSB index. Alternatively, this indicator bit can also indicate whether a first synchronization signal exists in the directions corresponding to all SSB indices, for example, simultaneously indicating that a first synchronization signal exists in the directions corresponding to all SSB indices, or simultaneously indicating that a first synchronization signal does not exist in the directions corresponding to all SSB indices. In other words, the value indicated by this bit can be the same for different SSB indices.

[0084] For example, broadcast signaling may include a bit string containing multiple bits corresponding to multiple SSB indices. Each bit is used to indicate whether its corresponding SSB index is associated with a first synchronization signal. For instance, a bit value of 1 indicates that a first synchronization signal is transmitted in the direction of its corresponding SSB index, and a bit value of 0 indicates that a first synchronization signal is not transmitted in the direction of its corresponding SSB index.

[0085] The larger the carrier spacing of the first synchronization signal, the greater the estimated Doppler frequency shift. Therefore, a larger subcarrier spacing is desired when using the first signal modulation method. Thus, in some implementations, the carrier spacing of the first synchronization signal can be different from the carrier spacing of the second synchronization signal. For example, the subcarrier spacing used to transmit the first synchronization signal and / or the pilot signal associated with the first synchronization signal is the first subcarrier spacing, and the subcarrier spacing used to transmit the second synchronization signal and / or the pilot signal associated with the second synchronization signal is the second subcarrier spacing, wherein the first subcarrier spacing is different from the second subcarrier spacing. Furthermore, the first subcarrier spacing can be configured to be greater than the second subcarrier spacing; for example, the first subcarrier spacing can be N times the second subcarrier spacing (e.g., 1, 1.5, or 2 times, etc.).

[0086] For example, information on the subcarrier spacing corresponding to a first synchronization signal or a first signal modulation scheme supported on a certain frequency band, and / or information on the subcarrier spacing corresponding to a second synchronization signal or a second signal modulation scheme, can be agreed upon or indicated by the network device. The subcarrier spacing information may include one or more subcarrier spacings, or a set of subcarriers. For instance, the subcarrier spacing information corresponding to the first synchronization signal or the first signal modulation scheme may be 120kHz, 240kHz, or subcarrier set 1 (including 120kHz and 240kHz); the subcarrier spacing information corresponding to the second synchronization signal or the second signal modulation scheme may be 15kHz, 30kHz, 60kHz, or subcarrier set 2 (including 15kHz, 30kHz, and 60kHz). This subcarrier spacing information can, for example, be carried in SIB1 or MIB information.

[0087] As can be seen, the embodiments of this application can perform signal transmission based on methods other than OFDM, such as transmitting synchronization signals, and provide a resource allocation scheme for the transmission of synchronization signals under time-delayed Doppler waveforms. Simultaneously, for situations where multiple multiple access methods (or multiple waveforms) coexist, a synchronization signal transmission (or detection) scheme is provided, enabling synchronization signals under different multiple access methods (or multiple waveforms) to complement each other, obtaining relatively accurate estimation results in the time and frequency domains, etc., providing a high-precision guarantee for subsequent access, communication, positioning measurement, sensing measurement, and link measurement.

[0088] The method embodiments of this application have been described in detail above with reference to Figures 1 to 5. The apparatus embodiments of this application will be described in detail below with reference to Figures 6 and 7. It should be understood that the descriptions of the method embodiments correspond to the descriptions of the apparatus embodiments; therefore, any parts not described in detail can be referred to the preceding method embodiments.

[0089] Figure 6 is a schematic diagram of the structure of a terminal device provided in an embodiment of this application. The terminal device 600 shown in Figure 6 may include a transceiver unit 610. The transceiver unit 610 is used to receive first information sent by a network device, the first information being used to instruct the terminal device to receive or send a first synchronization signal; wherein, synchronization based on the first synchronization signal is associated with synchronization based on a second synchronization signal, and the second synchronization signal and the first synchronization signal are synchronization signals of different types.

[0090] In some implementations, the first synchronization signal is a synchronization signal obtained based on a first signal modulation method, and the second synchronization signal is obtained based on a second signal modulation method, wherein the first signal modulation method is different from the second signal modulation method.

[0091] In some implementations, the first signal modulation method is a signal modulation method other than OFDM, and the second signal modulation method is OFDM.

[0092] In some implementations, the first signal modulation method is OTFS.

[0093] In some implementations, the second synchronization signal includes PSS and / or SSS.

[0094] In some implementations, the first information is carried in: the second synchronization signal; or, the PBCH associated with the second synchronization signal; or, the MIB associated with the second synchronization signal; or, the SIB1 associated with the second synchronization signal.

[0095] In some implementations, the transceiver unit 610 is further configured to: receive second information sent by the network device, wherein the second information is used to instruct the terminal device to report the capability information of the terminal device, and the capability information is used to determine whether to transmit the first synchronization signal.

[0096] In some implementations, the capability information is used to indicate one or more of the following: whether it has the capability of high-order modulation; whether it has the capability of high code rate; whether it supports a first synchronization signal; and whether it supports a first signal modulation method.

[0097] In some implementations, the second information and / or the capability information are carried in the uplink random process message of the terminal device.

[0098] In some implementations, the second information is carried in message MSG2 during the uplink random access procedure; and / or, the capability information is carried in message MSG3 during the uplink random access procedure.

[0099] In some implementations, the first synchronization signal is associated with a different RO (Random Access Preamble) than the second synchronization signal; and / or, the first synchronization signal is associated with a different random access preamble than the second synchronization signal.

[0100] In some implementations, the transceiver unit 610 is further configured to: receive the second synchronization signal and / or PBCH sent by the network device; wherein the time domain position of the second synchronization signal is before the time domain position of the first synchronization signal, and the time domain position of the PBCH is between the time domain position of the second synchronization signal and the time domain position of the first synchronization signal or after the time domain position of the first synchronization signal.

[0101] In some implementations, the time-domain position of the first synchronization signal is the next resource position for transmitting the synchronization signal after the time-domain position of the second synchronization signal; and / or, the frequency-domain position of the first synchronization signal is adjacent to the frequency-domain position of the second synchronization signal.

[0102] In some implementations, the first information is further used to indicate one or more of the following: time-domain information of the first synchronization signal; frequency-domain information of the first synchronization signal; resource information of the pilot signal associated with the first synchronization signal; SSB index associated with the first synchronization signal; and subcarrier spacing associated with the first synchronization signal.

[0103] In some implementations, the first signal modulation method is associated with a first frequency band, and the sub-frequency bands in the first frequency band that support the first signal modulation method include: sub-frequency bands near the high-frequency end of the first frequency band; and / or, sub-frequency bands near the low-frequency end of the first frequency band.

[0104] In some implementations, the first synchronization signal is associated with a second frequency band, and the sub-frequency bands in the second frequency band that support the first synchronization signal include one or more of the following: sub-frequency bands near the high-frequency end of the second frequency band; sub-frequency bands near the low-frequency end of the second frequency band; an intermediate frequency band between the high-frequency band and the low-frequency band; and a sub-frequency band between the high-frequency band and the low-frequency band that is closer to a third frequency band; wherein the third frequency band is a frequency band that supports a second signal modulation scheme and / or a second synchronization signal.

[0105] In some implementations, the first synchronization signal is associated with an SSB index, and the SSB index associated with the first synchronization signal is carried in the PBCH associated with the second synchronization signal, or carried in broadcast signaling.

[0106] In some implementations, the broadcast signaling includes a bit string comprising multiple bits corresponding to multiple SSB indices, wherein each of the multiple bits is used to indicate whether its corresponding SSB index is associated with the first synchronization signal.

[0107] In some implementations, the subcarrier spacing used for transmitting the first synchronization signal and / or the pilot signal associated with the first synchronization signal is a first subcarrier spacing, and the subcarrier spacing used for transmitting the second synchronization signal and / or the pilot signal associated with the second synchronization signal is a second subcarrier spacing, wherein the first subcarrier spacing is different from the first subcarrier spacing.

[0108] In some implementations, the first subcarrier interval is greater than the second subcarrier interval.

[0109] It is understood that the transceiver unit 610 may be, for example, a transceiver 830. Additionally, the terminal device 600 may optionally include a processor 810 and a memory 820, as detailed in Figure 8.

[0110] Figure 7 is a schematic diagram of the structure of a network device provided in an embodiment of this application. The network device 700 shown in Figure 7 may include a transceiver unit 710. The transceiver unit 710 is used to send first information to a terminal device, the first information being used to instruct the terminal device to receive or send a first synchronization signal; wherein, synchronization based on the first synchronization signal is associated with synchronization based on a second synchronization signal, and the second synchronization signal and the first synchronization signal are synchronization signals of different types.

[0111] In some implementations, the first synchronization signal is a synchronization signal obtained based on a first signal modulation method, and the second synchronization signal is obtained based on a second signal modulation method, wherein the first signal modulation method is different from the second signal modulation method.

[0112] In some implementations, the first signal modulation method is a signal modulation method other than OFDM, and the second signal modulation method is OFDM.

[0113] In some implementations, the first signal modulation method is OTFS.

[0114] In some implementations, the second synchronization signal includes PSS and / or SSS.

[0115] In some implementations, the first information is carried in: the second synchronization signal; or, the PBCH associated with the second synchronization signal; or, the MIB associated with the second synchronization signal; or, the SIB1 associated with the second synchronization signal.

[0116] In some implementations, the transceiver unit 710 is further configured to: send second information to the terminal device, wherein the second information is configured to instruct the terminal device to report its capability information, the capability information being associated with the first synchronization signal.

[0117] In some implementations, the capability information is used to indicate one or more of the following: whether it has the capability of high-order modulation; whether it has the capability of high code rate; whether it supports a first synchronization signal; and whether it supports a first signal modulation method.

[0118] In some implementations, the second information and / or the capability information are carried in the uplink random process message of the terminal device.

[0119] In some implementations, the second information is carried in message MSG2 during the uplink random access procedure; and / or, the capability information is carried in message MSG3 during the uplink random access procedure.

[0120] In some implementations, the first synchronization signal is associated with a different RO (Random Access Preamble) than the second synchronization signal; and / or, the first synchronization signal is associated with a different random access preamble than the second synchronization signal.

[0121] In some implementations, the transceiver unit 710 is further configured to: send the second synchronization signal and / or PBCH to the terminal device; wherein the time domain position of the second synchronization signal is before the time domain position of the first synchronization signal, and the time domain position of the PBCH is between the time domain position of the second synchronization signal and the time domain position of the first synchronization signal or after the time domain position of the first synchronization signal.

[0122] In some implementations, the time-domain position of the first synchronization signal is the next resource position for transmitting the synchronization signal after the time-domain position of the second synchronization signal; and / or, the frequency-domain position of the first synchronization signal is adjacent to the frequency-domain position of the second synchronization signal.

[0123] In some implementations, the first information is further used to indicate one or more of the following: time-domain information of the first synchronization signal; frequency-domain information of the first synchronization signal; resource information of the pilot signal associated with the first synchronization signal; SSB index associated with the first synchronization signal; and subcarrier spacing associated with the first synchronization signal.

[0124] In some implementations, the first signal modulation method is associated with a first frequency band, and the sub-frequency bands in the first frequency band that support the first signal modulation method include: sub-frequency bands near the high-frequency end of the first frequency band; and / or, sub-frequency bands near the low-frequency end of the first frequency band.

[0125] In some implementations, the first synchronization signal is associated with a second frequency band, and the sub-frequency bands in the second frequency band that support the first synchronization signal include one or more of the following: sub-frequency bands near the high-frequency end of the second frequency band; sub-frequency bands near the low-frequency end of the second frequency band; an intermediate frequency band between the high-frequency band and the low-frequency band; and a sub-frequency band between the high-frequency band and the low-frequency band that is closer to a third frequency band; wherein the third frequency band is a frequency band that supports a second signal modulation scheme and / or a second synchronization signal.

[0126] In some implementations, the first synchronization signal is associated with an SSB index, and the SSB index associated with the first synchronization signal is carried in the PBCH associated with the second synchronization signal, or carried in broadcast signaling.

[0127] In some implementations, the broadcast signaling includes a bit string comprising multiple bits corresponding to multiple SSB indices, wherein each of the multiple bits is used to indicate whether its corresponding SSB index is associated with the first synchronization signal.

[0128] In some implementations, the subcarrier spacing used for transmitting the first synchronization signal and / or the pilot signal associated with the first synchronization signal is a first subcarrier spacing, and the subcarrier spacing used for transmitting the second synchronization signal and / or the pilot signal associated with the second synchronization signal is a second subcarrier spacing, wherein the first subcarrier spacing is different from the first subcarrier spacing.

[0129] In some implementations, the first subcarrier interval is greater than the second subcarrier interval.

[0130] It is understood that the transceiver unit 710 may be, for example, a transceiver 830. Additionally, the network device 700 may optionally include a processor 810 and a memory 820, as detailed in Figure 8.

[0131] Figure 8 is a schematic structural diagram of a communication apparatus according to an embodiment of this application. The dashed lines in Figure 8 indicate that the unit or module is optional. The apparatus 800 can be used to implement the methods described in the above method embodiments. The apparatus 800 may be, for example, a chip, a terminal device, or a network device.

[0132] The apparatus 800 may include one or more processors 810. The processors 810 may support the apparatus 800 in implementing the methods described in the foregoing method embodiments. The processor 810 may be a general-purpose processor or a special-purpose processor. For example, the processor 810 may be a central processing unit (CPU). Alternatively, the processor 810 may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0133] The apparatus 800 may further include one or more memories 820. The memories 820 store programs that can be executed by the processor 810, causing the processor 810 to perform the methods described in the above method embodiments. The memories 820 may be independent of the processor 810, or they may be integrated into the processor 810.

[0134] The device 800 may also include a transceiver 830. The processor 810 can communicate with other devices or chips via the transceiver 830. For example, the processor 810 can send and receive data with other devices or chips via the transceiver 830.

[0135] This application also provides a communication system. The communication system includes the terminal device and network device described above. In some implementations, the system further includes other devices that interact with the terminal device and network device.

[0136] This application also provides a computer-readable storage medium for storing a program. This computer-readable storage medium can be applied to a terminal device or network device provided in this application, and the program causes a computer to execute the methods performed by the terminal device or network device in various embodiments of this application.

[0137] This application also provides a computer program product. The computer program product includes a program. This computer program product can be applied to a terminal device or network device provided in this application embodiment, and the program causes a computer to execute the methods performed by the terminal device or network device in the various embodiments of this application.

[0138] This application also provides a computer program. This computer program can be applied to the terminal device or network device provided in this application, and the computer program causes the computer to execute the methods performed by the terminal device or network device in the various embodiments of this application.

[0139] It should be understood that the terms "system" and "network" in the embodiments of this application can be used interchangeably. Furthermore, the terminology used in this application is only for explaining specific embodiments of this application and is not intended to limit this application. The terms "first," "second," "third," and "fourth," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. In addition, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0140] In the embodiments of this application, the term "instruction" can be a direct instruction, an indirect instruction, or an indication of a relationship. For example, A instructing B can mean that A directly instructs B, such as B being able to obtain information through A; it can also mean that A indirectly instructs B, such as A instructing C, so B can obtain information through C; or it can mean that there is a relationship between A and B.

[0141] In the embodiments of this application, "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean that B is determined solely based on A; B can also be determined based on A and / or other information.

[0142] In the embodiments of this application, the term "correspondence" can indicate a direct or indirect correspondence between two things, or an association between two things, or a relationship such as instruction and being instructed, configuration and being configured.

[0143] In this application embodiment, "predefined" or "preconfigured" can be implemented by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device (e.g., including terminal devices and network devices). This application does not limit the specific implementation method. For example, predefined can refer to what is defined in the protocol.

[0144] In this application embodiment, the "protocol" may refer to a standard protocol in the field of communication, such as the LTE protocol, the NR protocol, and related protocols applied to future communication systems. This application does not limit this.

[0145] In the embodiments of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0146] In the various embodiments of this application, the order of the above-mentioned processes does not imply 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 this application.

[0147] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0148] The units described as separate components may or may not be physically separate. 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 the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0149] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0150] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially 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, all or part of the processes or functions described in the embodiments of this application are generated. 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. 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 wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can read or a data storage device such as a server or data center that integrates one or more available media. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital video discs (DVDs)), or semiconductor media (e.g., solid-state disks (SSDs)).

[0151] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for wireless communication, characterized in that, include: The terminal device receives first information sent by the network device, the first information being used to instruct the terminal device to receive or send a first synchronization signal; The synchronization based on the first synchronization signal is associated with the synchronization based on the second synchronization signal, and the second synchronization signal and the first synchronization signal are synchronization signals of different types.

2. The method according to claim 1, characterized in that, The first synchronization signal is a synchronization signal obtained based on the first signal modulation method, and the second synchronization signal is obtained based on the second signal modulation method. The first signal modulation method is different from the second signal modulation method.

3. The method according to claim 2, characterized in that, The first signal modulation method is a signal modulation method other than Orthogonal Frequency Division Multiplexing (OFDM), and the second signal modulation method is OFDM.

4. The method according to claim 3, characterized in that, The first signal modulation method is orthogonal time-frequency space OTFS.

5. The method according to any one of claims 1 to 4, characterized in that, The second synchronization signal includes the primary synchronization signal PSS and / or the secondary synchronization signal SSS.

6. The method according to any one of claims 1 to 5, characterized in that, The first information is carried in: The second synchronization signal; or, The physical broadcast channel PBCH associated with the second synchronization signal; or, The main information block (MIB) associated with the second synchronization signal; or, System information block SIB1 associated with the second synchronization signal.

7. The method according to any one of claims 1 to 6, characterized in that, The method further includes: The terminal device receives second information sent by the network device, wherein the second information is used to instruct the terminal device to report its capability information, and the capability information is used to determine whether to transmit the first synchronization signal.

8. The method according to claim 7, characterized in that, The capability information is used to indicate one or more of the following: Does it have the capability for high-order modulation? Does it have the capability for high bitrates? Does it support the first synchronization signal? Does it support the first signal modulation method? 9. The method according to claim 7 or 8, characterized in that, The second information and / or the capability information are carried in the uplink random process message of the terminal device.

10. The method according to claim 9, characterized in that, The second information is carried in message MSG2 during the uplink random access procedure; and / or, The capability information is carried in message MSG3 during the uplink random access process.

11. The method according to any one of claims 1 to 10, characterized in that, The first synchronization signal and the second synchronization signal are associated with different physical random access channel opportunities (ROs); and / or, The first synchronization signal and the second synchronization signal are associated with different random access preambles.

12. The method according to any one of claims 1 to 11, characterized in that, The method further includes: The terminal device receives the second synchronization signal and / or PBCH sent by the network device; Wherein, the time domain position of the second synchronization signal is before the time domain position of the first synchronization signal, and the time domain position of the PBCH is between the time domain positions of the second synchronization signal and the first synchronization signal or after the time domain position of the first synchronization signal.

13. The method according to claim 12, characterized in that, The time-domain position of the first synchronization signal is the next resource position for transmitting the synchronization signal after the time-domain position of the second synchronization signal; and / or, the frequency-domain position of the first synchronization signal is adjacent to the frequency-domain position of the second synchronization signal.

14. The method according to any one of claims 1 to 13, characterized in that, The first information is also used to indicate one or more of the following: The time-domain information of the first synchronization signal; The frequency domain information of the first synchronization signal; Resource information of the pilot signal associated with the first synchronization signal; The synchronization signal broadcast channel block (SSB) index associated with the first synchronization signal; The subcarrier spacing associated with the first synchronization signal.

15. The method according to any one of claims 1 to 14, characterized in that, The first signal modulation method is associated with a first frequency band, and the sub-frequency bands in the first frequency band that support the first signal modulation method include: The sub-bands near the high-frequency end of the first frequency band; and / or, The sub-bands near the low-frequency end of the first frequency band.

16. The method according to any one of claims 1 to 15, characterized in that, The first synchronization signal is associated with a second frequency band, and the sub-frequency bands in the second frequency band that support the first synchronization signal include one or more of the following: The sub-bands near the high-frequency end of the second frequency band; The sub-bands near the low-frequency end of the second frequency band; The intermediate frequency band between the high-frequency band and the low-frequency band; The high-frequency band and the sub-band of the low-frequency band that is closer to the third frequency band; The third frequency band is a frequency band that supports the second signal modulation method and / or the second synchronization signal.

17. The method according to any one of claims 1 to 16, characterized in that, The first synchronization signal is associated with an SSB index, and the SSB index associated with the first synchronization signal is carried in the PBCH associated with the second synchronization signal, or carried in broadcast signaling.

18. The method according to claim 17, characterized in that, The broadcast signaling includes a bit string, which includes multiple bits corresponding to multiple SSB indices, wherein each of the multiple bits is used to indicate whether its corresponding SSB index is associated with the first synchronization signal.

19. The method according to any one of claims 1 to 18, characterized in that, The subcarrier spacing used for transmitting the first synchronization signal and / or the pilot signal associated with the first synchronization signal is a first subcarrier spacing, and the subcarrier spacing used for transmitting the second synchronization signal and / or the pilot signal associated with the second synchronization signal is a second subcarrier spacing, wherein the first subcarrier spacing is different from the first subcarrier spacing.

20. The method according to claim 19, characterized in that, The first subcarrier spacing is greater than the second subcarrier spacing.

21. A method for wireless communication, characterized in that, include: The network device sends first information to the terminal device, the first information being used to instruct the terminal device to receive or send a first synchronization signal; The synchronization based on the first synchronization signal is associated with the synchronization based on the second synchronization signal, and the second synchronization signal and the first synchronization signal are synchronization signals of different types.

22. The method according to claim 21, characterized in that, The first synchronization signal is a synchronization signal obtained based on the first signal modulation method, and the second synchronization signal is obtained based on the second signal modulation method. The first signal modulation method is different from the second signal modulation method.

23. The method according to claim 22, characterized in that, The first signal modulation method is a signal modulation method other than Orthogonal Frequency Division Multiplexing (OFDM), and the second signal modulation method is OFDM.

24. The method according to claim 23, characterized in that, The first signal modulation method is orthogonal time-frequency space OTFS.

25. The method according to any one of claims 21 to 24, characterized in that, The second synchronization signal includes the primary synchronization signal PSS and / or the secondary synchronization signal SSS.

26. The method according to any one of claims 21 to 25, characterized in that, The first information is carried in: The second synchronization signal; or, The physical broadcast channel PBCH associated with the second synchronization signal; or, The main information block (MIB) associated with the second synchronization signal; or, System information block SIB1 associated with the second synchronization signal.

27. The method according to any one of claims 21 to 26, characterized in that, The method further includes: The network device sends a second message to the terminal device, wherein the second message is used to instruct the terminal device to report its capability information, which is associated with the first synchronization signal.

28. The method according to claim 27, characterized in that, The capability information is used to indicate one or more of the following: Does it have the capability for high-order modulation? Does it have the capability for high bitrates? Does it support the first synchronization signal? Does it support the first signal modulation method? 29. The method according to claim 27 or 28, characterized in that, The second information and / or the capability information are carried in the uplink random process message of the terminal device.

30. The method according to claim 29, characterized in that, The second information is carried in message MSG2 during the uplink random access procedure; and / or, The capability information is carried in message MSG3 during the uplink random access process.

31. The method according to any one of claims 21 to 30, characterized in that, The first synchronization signal and the second synchronization signal are associated with different physical random access channel opportunities (ROs); and / or, The first synchronization signal and the second synchronization signal are associated with different random access preambles.

32. The method according to any one of claims 21 to 31, characterized in that, The method further includes: The network device sends the second synchronization signal and / or PBCH to the terminal device; Wherein, the time domain position of the second synchronization signal is before the time domain position of the first synchronization signal, and the time domain position of the PBCH is between the time domain positions of the second synchronization signal and the first synchronization signal or after the time domain position of the first synchronization signal.

33. The method according to claim 32, characterized in that, The time-domain position of the first synchronization signal is the next resource position for transmitting the synchronization signal after the time-domain position of the second synchronization signal; and / or, the frequency-domain position of the first synchronization signal is adjacent to the frequency-domain position of the second synchronization signal.

34. The method according to any one of claims 21 to 33, characterized in that, The first information is also used to indicate one or more of the following: The time-domain information of the first synchronization signal; The frequency domain information of the first synchronization signal; Resource information of the pilot signal associated with the first synchronization signal; The synchronization signal broadcast channel block (SSB) index associated with the first synchronization signal; The subcarrier spacing associated with the first synchronization signal.

35. The method according to any one of claims 21 to 34, characterized in that, The first signal modulation method is associated with a first frequency band, and the sub-frequency bands in the first frequency band that support the first signal modulation method include: The sub-bands near the high-frequency end of the first frequency band; and / or, The sub-bands near the low-frequency end of the first frequency band.

36. The method according to any one of claims 21 to 35, characterized in that, The first synchronization signal is associated with a second frequency band, and the sub-frequency bands in the second frequency band that support the first synchronization signal include one or more of the following: The sub-bands near the high-frequency end of the second frequency band; The sub-bands near the low-frequency end of the second frequency band; The intermediate frequency band between the high-frequency band and the low-frequency band; The high-frequency band and the sub-band of the low-frequency band that is closer to the third frequency band; The third frequency band is a frequency band that supports the second signal modulation method and / or the second synchronization signal.

37. The method according to any one of claims 21 to 36, characterized in that, The first synchronization signal is associated with an SSB index, and the SSB index associated with the first synchronization signal is carried in the PBCH associated with the second synchronization signal, or carried in broadcast signaling.

38. The method according to claim 37, characterized in that, The broadcast signaling includes a bit string, which includes multiple bits corresponding to multiple SSB indices, wherein each of the multiple bits is used to indicate whether its corresponding SSB index is associated with the first synchronization signal.

39. The method according to any one of claims 21 to 38, characterized in that, The subcarrier spacing used for transmitting the first synchronization signal and / or the pilot signal associated with the first synchronization signal is a first subcarrier spacing, and the subcarrier spacing used for transmitting the second synchronization signal and / or the pilot signal associated with the second synchronization signal is a second subcarrier spacing, wherein the first subcarrier spacing is different from the first subcarrier spacing.

40. The method according to claim 39, characterized in that, The first subcarrier spacing is greater than the second subcarrier spacing.

41. A terminal device, characterized in that, include: A transceiver unit is used to receive first information sent by a network device, wherein the first information is used to instruct the terminal device to receive or send a first synchronization signal. The synchronization based on the first synchronization signal is associated with the synchronization based on the second synchronization signal, and the second synchronization signal and the first synchronization signal are synchronization signals of different types.

42. The terminal device according to claim 41, characterized in that, The first synchronization signal is a synchronization signal obtained based on the first signal modulation method, and the second synchronization signal is obtained based on the second signal modulation method. The first signal modulation method is different from the second signal modulation method.

43. The terminal device according to claim 42, characterized in that, The first signal modulation method is a signal modulation method other than Orthogonal Frequency Division Multiplexing (OFDM), and the second signal modulation method is OFDM.

44. The terminal device according to claim 43, characterized in that, The first signal modulation method is orthogonal time-frequency space OTFS.

45. The terminal device according to any one of claims 41 to 44, characterized in that, The second synchronization signal includes the primary synchronization signal PSS and / or the secondary synchronization signal SSS.

46. ​​The terminal device according to any one of claims 41 to 45, characterized in that, The first information is carried in: The second synchronization signal; or, The physical broadcast channel PBCH associated with the second synchronization signal; or, The main information block (MIB) associated with the second synchronization signal; or, System information block SIB1 associated with the second synchronization signal.

47. The terminal device according to any one of claims 41 to 46, characterized in that, The transceiver unit is also used for: The system receives second information sent by the network device, wherein the second information is used to instruct the terminal device to report its capability information, and the capability information is used to determine whether to transmit the first synchronization signal.

48. The terminal device according to claim 47, characterized in that, The capability information is used to indicate one or more of the following: Does it have the capability for high-order modulation? Does it have the capability for high bitrates? Does it support the first synchronization signal? Does it support the first signal modulation method? 49. The terminal device according to claim 47 or 48, characterized in that, The second information and / or the capability information are carried in the uplink random process message of the terminal device.

50. The terminal device according to claim 49, characterized in that, The second information is carried in message MSG2 during the uplink random access procedure; and / or, The capability information is carried in message MSG3 during the uplink random access process.

51. The terminal device according to any one of claims 41 to 50, characterized in that, The first synchronization signal and the second synchronization signal are associated with different physical random access channel opportunities (ROs); and / or, The first synchronization signal and the second synchronization signal are associated with different random access preambles.

52. The terminal device according to any one of claims 41 to 51, characterized in that, The transceiver unit is also used for: Receive the second synchronization signal and / or PBCH sent by the network device; Wherein, the time domain position of the second synchronization signal is before the time domain position of the first synchronization signal, and the time domain position of the PBCH is between the time domain positions of the second synchronization signal and the first synchronization signal or after the time domain position of the first synchronization signal.

53. The terminal device according to claim 52, characterized in that, The time-domain position of the first synchronization signal is the next resource position for transmitting the synchronization signal after the time-domain position of the second synchronization signal; and / or, the frequency-domain position of the first synchronization signal is adjacent to the frequency-domain position of the second synchronization signal.

54. The terminal device according to any one of claims 41 to 53, characterized in that, The first information is also used to indicate one or more of the following: The time-domain information of the first synchronization signal; The frequency domain information of the first synchronization signal; Resource information of the pilot signal associated with the first synchronization signal; The synchronization signal broadcast channel block (SSB) index associated with the first synchronization signal; The subcarrier spacing associated with the first synchronization signal.

55. The terminal device according to any one of claims 41 to 54, characterized in that, The first signal modulation method is associated with a first frequency band, and the sub-frequency bands in the first frequency band that support the first signal modulation method include: The sub-bands near the high-frequency end of the first frequency band; and / or, The sub-bands near the low-frequency end of the first frequency band.

56. The terminal device according to any one of claims 41 to 55, characterized in that, The first synchronization signal is associated with a second frequency band, and the sub-frequency bands in the second frequency band that support the first synchronization signal include one or more of the following: The sub-bands near the high-frequency end of the second frequency band; The sub-bands near the low-frequency end of the second frequency band; The intermediate frequency band between the high-frequency band and the low-frequency band; The high-frequency band and the sub-band of the low-frequency band that is closer to the third frequency band; The third frequency band is a frequency band that supports the second signal modulation method and / or the second synchronization signal.

57. The terminal device according to any one of claims 41 to 56, characterized in that, The first synchronization signal is associated with an SSB index, and the SSB index associated with the first synchronization signal is carried in the PBCH associated with the second synchronization signal, or carried in broadcast signaling.

58. The terminal device according to claim 57, characterized in that, The broadcast signaling includes a bit string, which includes multiple bits corresponding to multiple SSB indices, wherein each of the multiple bits is used to indicate whether its corresponding SSB index is associated with the first synchronization signal.

59. The terminal device according to any one of claims 41 to 58, characterized in that, The subcarrier spacing used for transmitting the first synchronization signal and / or the pilot signal associated with the first synchronization signal is a first subcarrier spacing, and the subcarrier spacing used for transmitting the second synchronization signal and / or the pilot signal associated with the second synchronization signal is a second subcarrier spacing, wherein the first subcarrier spacing is different from the first subcarrier spacing.

60. The terminal device according to claim 59, characterized in that, The first subcarrier spacing is greater than the second subcarrier spacing.

61. A network device, characterized in that, include: A transceiver unit is used to send first information to a terminal device, wherein the first information is used to instruct the terminal device to receive or send a first synchronization signal. The synchronization based on the first synchronization signal is associated with the synchronization based on the second synchronization signal, and the second synchronization signal and the first synchronization signal are synchronization signals of different types.

62. The network device according to claim 61, characterized in that, The first synchronization signal is a synchronization signal obtained based on the first signal modulation method, and the second synchronization signal is obtained based on the second signal modulation method. The first signal modulation method is different from the second signal modulation method.

63. The network device according to claim 62, characterized in that, The first signal modulation method is a signal modulation method other than Orthogonal Frequency Division Multiplexing (OFDM), and the second signal modulation method is OFDM.

64. The network device according to claim 63, characterized in that, The first signal modulation method is orthogonal time-frequency space OTFS.

65. The network device according to any one of claims 61 to 64, characterized in that, The second synchronization signal includes the primary synchronization signal PSS and / or the secondary synchronization signal SSS.

66. The network device according to any one of claims 61 to 65, characterized in that, The first information is carried in: The second synchronization signal; or, The physical broadcast channel PBCH associated with the second synchronization signal; or, The main information block (MIB) associated with the second synchronization signal; or, System information block SIB1 associated with the second synchronization signal.

67. The network device according to any one of claims 61 to 66, characterized in that, The transceiver unit is also used for: Send a second message to the terminal device, wherein the second message is used to instruct the terminal device to report the capability information of the terminal device, and the capability information is associated with the first synchronization signal.

68. The network device according to claim 67, characterized in that, The capability information is used to indicate one or more of the following: Does it have the capability for high-order modulation? Does it have the capability for high bitrates? Does it support the first synchronization signal? Does it support the first signal modulation method? 69. The network device according to claim 67 or 68, characterized in that, The second information and / or the capability information are carried in the uplink random process message of the terminal device.

70. The network device according to claim 69, characterized in that, The second information is carried in message MSG2 during the uplink random access procedure; and / or, The capability information is carried in message MSG3 during the uplink random access process.

71. The network device according to any one of claims 61 to 70, characterized in that, The first synchronization signal and the second synchronization signal are associated with different physical random access channel opportunities (ROs); and / or, The first synchronization signal and the second synchronization signal are associated with different random access preambles.

72. The network device according to any one of claims 61 to 71, characterized in that, The transceiver unit is also used for: Send the second synchronization signal and / or PBCH to the terminal device; Wherein, the time domain position of the second synchronization signal is before the time domain position of the first synchronization signal, and the time domain position of the PBCH is between the time domain positions of the second synchronization signal and the first synchronization signal or after the time domain position of the first synchronization signal.

73. The network device according to claim 72, characterized in that, The time-domain position of the first synchronization signal is the next resource position for transmitting the synchronization signal after the time-domain position of the second synchronization signal; and / or, the frequency-domain position of the first synchronization signal is adjacent to the frequency-domain position of the second synchronization signal.

74. The network device according to any one of claims 61 to 73, characterized in that, The first information is also used to indicate one or more of the following: The time-domain information of the first synchronization signal; The frequency domain information of the first synchronization signal; Resource information of the pilot signal associated with the first synchronization signal; The synchronization signal broadcast channel block (SSB) index associated with the first synchronization signal; The subcarrier spacing associated with the first synchronization signal.

75. The network device according to any one of claims 61 to 74, characterized in that, The first signal modulation method is associated with a first frequency band, and the sub-frequency bands in the first frequency band that support the first signal modulation method include: The sub-bands near the high-frequency end of the first frequency band; and / or, The sub-bands near the low-frequency end of the first frequency band.

76. The network device according to any one of claims 61 to 75, characterized in that, The first synchronization signal is associated with a second frequency band, and the sub-frequency bands in the second frequency band that support the first synchronization signal include one or more of the following: The sub-bands near the high-frequency end of the second frequency band; The sub-bands near the low-frequency end of the second frequency band; The intermediate frequency band between the high-frequency band and the low-frequency band; The high-frequency band and the sub-band of the low-frequency band that is closer to the third frequency band; The third frequency band is a frequency band that supports the second signal modulation method and / or the second synchronization signal.

77. The network device according to any one of claims 61 to 76, characterized in that, The first synchronization signal is associated with an SSB index, and the SSB index associated with the first synchronization signal is carried in the PBCH associated with the second synchronization signal, or carried in broadcast signaling.

78. The network device according to claim 77, characterized in that, The broadcast signaling includes a bit string, which includes multiple bits corresponding to multiple SSB indices, wherein each of the multiple bits is used to indicate whether its corresponding SSB index is associated with the first synchronization signal.

79. The network device according to any one of claims 61 to 78, characterized in that, The subcarrier spacing used for transmitting the first synchronization signal and / or the pilot signal associated with the first synchronization signal is a first subcarrier spacing, and the subcarrier spacing used for transmitting the second synchronization signal and / or the pilot signal associated with the second synchronization signal is a second subcarrier spacing, wherein the first subcarrier spacing is different from the first subcarrier spacing.

80. The network device according to claim 79, characterized in that, The first subcarrier spacing is greater than the second subcarrier spacing.

81. A terminal device, characterized in that, The device includes a transceiver, a memory, and a processor. The memory stores a program, and the processor invokes the program in the memory and controls the transceiver to receive or send signals so that the terminal device performs the method according to any one of claims 1 to 20.

82. A network device, characterized in that, The device includes a transceiver, a memory, and a processor. The memory stores a program, and the processor invokes the program in the memory and controls the transceiver to receive or transmit signals so that the network device performs the method according to any one of claims 10 to 40.

83. An apparatus, characterized in that, Includes a processor for calling a program from memory to cause the apparatus to perform the method according to any one of claims 1 to 40.

84. A chip, characterized in that, Includes a processor for calling a program from memory, causing a device on which the chip is mounted to perform the method according to any one of claims 1 to 40.

85. A computer-readable storage medium, characterized in that, It contains a program that causes a computer to perform the method according to any one of claims 1 to 40.

86. A computer program product, characterized in that, Includes a program that causes a computer to perform the method according to any one of claims 1 to 40.

87. A computer program, characterized in that, The computer program causes the computer to perform the method according to any one of claims 1 to 40.

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