Method and apparatus for wireless communication

Abstract

A method and apparatus for wireless communication are provided. The method includes determining, by a first communication device, at least one waveform parameter related to a first waveform, wherein the at least one waveform parameter is used for a first transmission based on the first waveform, and the first waveform is different from an OFDM waveform and a DFT-s-OFDM waveform, and the first communication device is a terminal device or a network device.

Description

Technical Field

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

[0002] Certain novel waveforms (e.g., affine frequency division multiplexing (AFDM) waveforms) have demonstrated superior performance in both communication and sensing, making them competitive technologies. However, these modulation techniques require compatibility with existing systems. When integrating these modulation techniques into existing systems, determining and communicating key waveform parameters becomes a key challenge. Summary of the Invention

[0003] This application provides a method and apparatus for wireless communication. The various aspects of this application will be described below.

[0004] In a first aspect, a method for wireless communication is provided, comprising: a first communication device determining at least one waveform parameter associated with a first waveform; wherein the at least one waveform parameter is used for performing a first transmission based on the first waveform, the first waveform being different from an orthogonal frequency division multiplexing (OFDM) waveform and a discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) waveform, and the first communication device being a terminal device or a network device.

[0005] In a second aspect, a method for wireless communication is provided, comprising: a second communication device receiving at least one waveform parameter associated with a first waveform; wherein the at least one waveform parameter is from a first communication device, the at least one waveform parameter being used for a first transmission based on the first waveform, the first waveform being different from an OFDM waveform and a DFT-s-OFDM waveform; when the first communication device is a terminal device, the second communication device is a network device; when the first communication device is a network device, the second communication device is a terminal device.

[0006] Thirdly, an apparatus for wireless communication is provided, the apparatus being a first communication device, the apparatus comprising: a determining unit for determining at least one waveform parameter associated with a first waveform; wherein the at least one waveform parameter is used for performing a first transmission based on the first waveform, the first waveform being different from OFDM waveforms and DFT-s-OFDM waveforms, and the first communication device being a terminal device or a network device.

[0007] Fourthly, an apparatus for wireless communication is provided, the apparatus being a second communication device, the apparatus comprising: a transceiver unit for receiving at least one waveform parameter related to a first waveform; wherein the at least one waveform parameter originates from the first communication device, the at least one waveform parameter is used for performing a first transmission based on the first waveform, the first waveform being different from OFDM waveforms and DFT-s-OFDM waveforms; when the first communication device is a terminal device, the second communication device is a network device; when the first communication device is a network device, the second communication device is a terminal device.

[0008] Fifthly, a communication device is provided, including a memory and a processor, the memory for storing a program, and the processor for calling the program in the memory to perform the method as described in the first or second aspect.

[0009] A sixth aspect provides an apparatus including a processor for calling a program from memory to perform the method as described in the first or second aspect.

[0010] A seventh aspect provides a chip including a processor for calling a program from memory, causing a device on which the chip is mounted to perform the method as described in the first or second aspect.

[0011] Eighthly, 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.

[0012] Ninth aspect, a computer program product is provided, including a program that causes a computer to perform the method as described in the first or second aspect.

[0013] A tenth aspect provides a computer program that causes a computer to perform the method described in any one of the first to sixth aspects.

[0014] In this embodiment, a first communication device (e.g., a terminal device or a network device) can determine at least one waveform parameter associated with a first waveform to perform a first transmission based on the first waveform. The first waveform differs from OFDM waveforms and DFT-s-OFDM waveforms; that is, the first waveform is a new waveform. Therefore, the waveform parameters used to implement the new waveform can be determined by the terminal device or the network device. Through effective coordination, the waveform parameters can be determined by different devices, thus adapting to data transmission requirements in different scenarios. Attached Figure Description

[0015] Figure 1 This is a system architecture example diagram of a wireless communication system to which embodiments of this application can be applied.

[0016] Figure 2 This is a schematic diagram of a network architecture applicable to embodiments of this application.

[0017] Figure 3A and Figure 3B This is a schematic diagram of a wireless protocol stack structure applicable to embodiments of this application.

[0018] Figure 4 This is a schematic diagram of a possible implementation of an AFDM transmitter.

[0019] Figure 5 This is a schematic diagram of a possible implementation of a receiver that can apply AFDM.

[0020] Figure 6 This is a schematic diagram of a possible implementation of the transceiver end of an AFDM communication system.

[0021] Figure 7 This is a flowchart illustrating a method for wireless communication proposed in an embodiment of this application.

[0022] Figure 8 for Figure 7 The flowchart illustrates one possible implementation of the method shown.

[0023] Figure 9 for Figure 7 A flowchart illustrating another possible implementation of the method shown.

[0024] Figure 10 This is a schematic diagram of a device for wireless communication provided in an embodiment of this application.

[0025] Figure 11 This is a schematic diagram of another device for wireless communication provided in an embodiment of this application.

[0026] Figure 12This is a schematic diagram of the structure of a communication device provided in an embodiment of this application. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0028] Figure 1 This is a system architecture example diagram of a wireless communication system 100 applicable to embodiments of this application. 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 may provide communication coverage for a specific geographical area and may communicate with the terminal device 120 located within that coverage area.

[0029] Figure 1 An exemplary network device and multiple terminal devices are illustrated, such as terminal devices 120a to 120j in the figure. Optionally, the wireless communication system 100 may include multiple network devices, and each network device may include other numbers of terminal devices within its coverage area; this application embodiment does not limit this.

[0030] Optionally, the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in this embodiment.

[0031] It should be understood that the technical solutions of the embodiments of this application can be applied to various communication systems, such as: 5th-generation (5G) systems or new radio (NR) systems, long-term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, advanced long-term evolution (LTE-A) systems, enhanced 5G (5G advanced) systems, etc. The technical solutions provided in this application can also be applied to future communication systems, such as 6th-generation (6G) mobile communication systems, satellite communication systems, and so on.

[0032] The communication system in this application embodiment can be applied to carrier aggregation (CA) scenarios, dual connectivity (DC) scenarios, and standalone (SA) network deployment scenarios.

[0033] The embodiments of this application can be applied to non-terrestrial network (NTN) systems. As an example, the NTN system can be an NR-based NTN system, a 6G-based NTN system, an Internet of Things (IoT)-based NTN system, or a narrowband Internet of Things (NB-IoT)-based NTN system.

[0034] The terminal device in this application embodiment can 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 device. 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. The terminal device in the embodiments of this application may be a mobile phone, tablet computer, laptop computer, handheld computer, camera equipment, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented reality (AR) device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc. Optionally, the terminal device may be used to act as a base station. For example, the terminal device may act as a scheduling entity, providing sidelink signals between UEs in vehicle-to-everything (V2X) or device-to-device (D2D) connections. For example, cellular phones and cars communicate with each other using sidelink signals. Cellular phones and smart home devices can communicate without relaying communication signals through base stations.

[0035] The network device in this application embodiment can be a device for communicating with a terminal device. This network device can also be called an access network device or a radio access network device, such as a base station (BS). In this application embodiment, the network device can refer to a radio access network (RAN) node or a next-generation RAN (NG-RAN) node (or device) that connects the terminal device to the wireless network. A base station can broadly encompass, or be replaced by, various names including: 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-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, micro base station, relay node, donor node, or similar entities, or combinations 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, a device that performs base station functions in D2D, V2X, and machine-to-machine (M2M) communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. Base stations 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.

[0036] 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.

[0037] In some deployments, the network device in this application embodiment may refer to a CU or a DU, or the network device may include both a CU and a DU. The gNB may also include an AAU.

[0038] 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.

[0039] In this embodiment of the application, the network device can provide services for a cell. The terminal device communicates with the network device through the transmission resources (e.g., frequency domain resources, or spectrum resources) used by the cell. The cell can be the cell corresponding to the network device (e.g., a base station). The cell can belong to a macro base station or to a base station corresponding to a small cell. The small cell here can include: metro cell, micro cell, pico cell, femto cell, etc. These small cells have the characteristics of small coverage area and low transmission power, and are suitable for providing high-speed data transmission services.

[0040] 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).

[0041] Figure 2 A schematic diagram of a network architecture 200 according to an embodiment of this application is illustrated. This network architecture 200 describes the network architecture of a 5G NR / LTE / LTE-A system, which can also be referred to as a 5G system (5GS) / evolved packet system (EPS) network architecture. The network architecture 200 includes at least one of the following: network device 110, terminal device 120, 5G core network (5GC) / evolved packet core (EPC) 210, home subscriber server (HSS) / unified data management (UDM) 220, and Internet service 230. Figure 2 The network devices and terminal devices in the diagram are illustrated using RAN and UE as examples, respectively.

[0042] like Figure 2As shown, network device 110 provides user plane and control plane protocol termination to terminal device 120. Network device 110 is connected to 5GC / EPC210 via an S1 / NG interface. 5GC / EPC210 includes a mobility management entity (MME) / authentication management field (AMF) / session management function (SMF) 211, other MMEs / AMFs / SMFs 214, a service gateway (S-GW) / user plane function (UPF) 212, and a packet data network gateway (P-GW) / UPF 213. MME / AMF / SMF 211 is the control node that handles signaling between terminal device 120 and 5GC / EPC210. ​​Generally, MME / AMF / SMF 211 provides bearer and connection management. All user Internet Protocol (IP) packets are transmitted through the S-GW / UPF212, which is itself connected to the P-GW / UPF213. The P-GW provides UE IP address allocation and other functions. The P-GW / UPF213 is connected to Internet service 230. Internet service 230 includes operator-compliant Internet Protocol services, specifically including the Internet, intranet, IP multimedia subsystem (IMS), and packet-switched streaming services. It is evident that network architecture 200 provides packet-switched services; however, those skilled in the art will readily understand that the various concepts presented herein can be extended to networks providing circuit-switched services or other cellular networks.

[0043] Figure 3A and Figure 3B The following are schematic diagrams of the wireless protocol stack structure of one embodiment of this application. Figure 3A and Figure 3B This introduction uses the 5G wireless protocol stack as an example. The 5G wireless protocol stack is divided into two planes: the user plane (UP) protocol stack and the control plane (CP) protocol stack. The user plane protocol stack contains the protocol suite used for user data transmission, while the control plane protocol stack contains the protocol suite used for control signaling transmission in the 5G system. The specific names of each protocol stack layer are as follows: like Figure 3AAs shown, the user plane protocol stack, from top to bottom, includes: the Service Data Adaptation Protocol (SDAP) layer, the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, the Medium Access Control (MAC) layer, and the Physical (PHY) layer.

[0044] like Figure 3B As shown, the control plane protocol stack, from top to bottom, includes: non-access stratum (NAS); radio resource control (RRC) layer, PDCP layer, RLC layer, MAC layer, and PHY layer.

[0045] It should be understood that the different layers in the above protocol stack have different functions, and they work together through inter-layer interaction to achieve communication between terminal devices and network devices. With the development of artificial intelligence technology, AI-assisted computing has permeated the processing implementation methods of the above protocol stack. For example, the scheduling algorithm of the MAC layer and the encoding / decoding algorithm of the PHY layer can apply artificial intelligence algorithms to improve the performance of communication algorithms.

[0046] As an example, Figure 3A and Figure 3B The wireless protocol architecture described herein is applicable to the first communication device in this application.

[0047] As an example, Figure 3A and Figure 3B The wireless protocol architecture described herein is applicable to the second communication device in this application.

[0048] As an example, Figure 3A and Figure 3B The wireless protocol architecture described herein is applicable to the terminal devices used in this application, such as UEs.

[0049] As an example, Figure 3A and Figure 3B The wireless protocol architecture described herein is applicable to network devices, such as base stations, in this application.

[0050] It should be understood that the interpretation of the terminology in the embodiments of this application may refer to the TS36, TS37 and TS38 series of specifications of the 3rd generation partnership project (3GPP), but may also refer to the specifications of the Institute of Electrical and Electronics Engineers (IEEE).

[0051] To facilitate understanding, some related technical knowledge involved in the embodiments of this application is first introduced. The following related technologies are optional solutions and can be arbitrarily combined with the technical solutions of the embodiments of this application, all of which fall within the protection scope of the embodiments of this application. The embodiments of this application include at least some of the following contents.

[0052] The integration of new waveform technologies with 6G is becoming key to achieving disruptive performance in next-generation communication systems. To meet the extreme demands of 6G in areas such as ultra-high speed, extremely low latency, massive connectivity, and integrated sensing, traditional OFDM waveforms are proving inadequate. Therefore, new waveforms are needed to provide new physical layer solutions for building a smart, green, and secure wireless foundation for 6G.

[0053] As an example, the novel waveform is, for instance, based on orthogonal time-frequency space (OTFS). This waveform can map the signal into the time-delay-Doppler domain to accommodate channel variations in highly mobile environments.

[0054] As an example, a novel waveform could be based on AFDM. AFDM enables affine Fourier transform domain modulation. Specifically, AFDM can map signals into the time-delay-Doppler domain or the affine domain for processing. By mapping data symbols to the affine Fourier transform domain composed of linear frequency modulated signals, the time delay and Doppler frequency offset are transformed into independent cyclic shifts in the transform domain, thus achieving full diversity in the time-delay-Doppler dimension of the channel in a dual-diffuse channel. Therefore, AFDM can effectively address time-frequency dual-selective fading in high-speed mobile environments, converting time-varying channels into almost non-fading deterministic channels, thereby significantly improving transmission reliability and spectral efficiency in complex scenarios.

[0055] AFDM is a highly promising 6G candidate waveform. Its core lies in using affine Fourier transform to map data symbols onto a "chirp" basis function composed of multiple linear frequency modulated signals. This design enables full diversity of time delay and Doppler frequency offset in dual-dispersion channels—signals exhibiting both time selectivity and frequency selectivity. Theoretically, AFDM can achieve optimal channel capacity performance and, compared to schemes such as OTFS, has lower signal processing complexity, requiring no complex two-dimensional channel estimation and equalization, making it easier to implement in hardware.

[0056] In typical 6G scenarios, AFDM demonstrates unique advantages. For example, in highly mobile environments such as high-speed rail and drone communications, AFDM fundamentally eliminates inter-carrier interference caused by high-speed motion by converting Doppler frequency shift into cyclic shift of the signal in the affine domain. Furthermore, in non-line-of-sight transmission in dense urban areas, the structure of AFDM chirped signals naturally possesses resistance to multipath interference, enabling robust signal reception through simple threshold detection. In addition, the waveform structure of AFDM is easily integrated with sensing functions; by analyzing the affine domain offset of the echo signal, high-precision communication and target positioning can be achieved simultaneously.

[0057] AFDM offers a novel approach to reliable 6G communication in complex electromagnetic environments by constructing an orthogonal and robust signal space in the affine domain. It not only approaches the Shannon limit in theoretical diversity performance, but its simple transceiver architecture also aligns with 6G's requirements for low power consumption and high energy efficiency. With advancements in algorithm optimization and hardware verification, AFDM is expected to become one of the core physical layer technologies supporting 6G's vision of "Internet of Everything."

[0058] The following section provides a detailed explanation of the principles of AFDM.

[0059] AFDM is a chirp-based multicarrier waveform. The core idea of ​​AFDM is to modulate information symbols onto a chirp signal and adjust it according to channel characteristics to achieve near-optimal transmission performance. The modulation and demodulation process of AFDM can be implemented using discrete affine Fourier transform (DAFT).

[0060] The affine Fourier transform (AFT) is a class of generalized integral transforms with four parameters, three of which are free parameters. For example, the affine Fourier transform can be expressed as: ; Among them, the four parameters satisfy: .

[0061] Based on three free parameters, AFT can achieve more flexible performance. For example, specifying the values ​​of the parameters can lead to special transformations, such as Fourier transforms and Chirp products.

[0062] In practical systems, AFDM modulation can be implemented using discrete AFDM. The Fourier transform can be rapidly calculated using the fast Fourier transform (FFT), resulting in a fast-computing DAFT form, upon which AFDM modulation is based.

[0063] For discrete AFDM, the discrete time series can be defined as: , ;in, N The number of discrete sampling points. N It is a positive integer. T Sampling time; The sequence after DAFT transformation is: , ;in, F The frequency sampling interval; Then we have: , ; in, It is a DAFT matrix. It is a Fourier matrix or a Fourier transform matrix. or It can be defined based on the following formula: ; Among them, parameters and They are respectively: , ; and The sweep frequency represents the time-frequency domain of the Chirp signal; The inverse of a matrix is: ; in, It is a matrix The conjugate transpose of .

[0064] The following is combined Figure 4 and Figure 5 The implementation block diagrams of the transmitter and receiver that can be applied to AFDM are introduced respectively. Figure 4 This is a schematic block diagram illustrating one possible implementation of the transmitter. Figure 5This is a schematic block diagram illustrating one possible implementation of the receiving end.

[0065] See Figure 4 At the transmitting end, the original symbol x first undergoes serial-to-parallel (S / P) conversion. In the inverse discrete affine Fourier transform (IDAFT) module, the output of the S / P processing is first based on a diagonal matrix. Perform element-wise multiplication, then inverse fast Fourier transform (IFFT), and finally based on... Element-wise multiplication is performed to generate a time-domain signal s. The time-domain signal s output by the IDAFT module is then processed by adding a chirp periodic prefix (CPP) and performing a parallel-to-serial (P / S) conversion before being sent to the wireless channel for transmission.

[0066] See Figure 5 The receiver performs the inverse operation of the transmitter to recover the original symbol. Specifically, the signal transmitted through the channel undergoes S / P processing and CPP removal sequentially to obtain the signal vector r. In the DAFT module, r is first multiplied by... Then perform an FFT, and finally multiply by The DAFT module obtains the recovered symbol stream y after P / S processing.

[0067] Depend on Figure 4 and Figure 5 It is evident that discrete AFDM waveforms are required for practical applications of AFDM modulation. Discrete AFDM typically employs a three-stage efficient structure: element-wise multiplication + FFT / IFFT + element-wise multiplication. The transmitter first multiplies the data symbols by a discrete quadratic phase sequence, then performs an IFFT transformation, and finally multiplies again by the quadratic phase sequence to generate the time-domain signal. The receiver performs the inverse operation, using FFT and phase compensation to recover the original symbols. This implementation effectively reduces complexity and reuses mature FFT / IFFT hardware acceleration units in OFDM systems, offering advantages in both low complexity and hardware friendliness.

[0068] To construct a complete AFDM communication system, steps such as symbol mapping, frame structure design, serial-to-parallel conversion, channel estimation, channel equalization, and demapping are required. For example, in actual transmission, issues such as frequency offset estimation, synchronization, and peak-to-average power ratio (PAPR) suppression also need to be considered.

[0069] The following is combined Figure 6This section provides an exemplary illustration of the overall architecture of the transmitter and receiver in an AFDM system. For example... Figure 6 As shown, the transmitter located in the upper part includes Figure 4 The multiple processing steps in the process, including the receiving end in the lower half, include... Figure 5 Multiple processing steps within it.

[0070] See Figure 6 At the transmitting end, the raw data undergoes binary sequence generation, symbol mapping, and frame structure design sequentially to generate symbol x. Subsequent processing of symbol x is then performed... Figure 4 The same applies, so I won't repeat myself.

[0071] After the output signal from the transmitter is transmitted through the wireless channel, it is combined with additive white Gaussian noise (AWGN) to generate the input signal for the receiver.

[0072] At the receiving end, the input signal first undergoes processing and... Figure 5 The process is the same and will not be repeated. The symbol stream y after parallel-to-serial conversion undergoes channel equalization processing based on the channel estimation results after parallel-to-serial conversion. Subsequently, demapping and sequence output are performed sequentially to recover the original bit stream. It should be noted that, considering factors such as sequence-to-symbol mapping and framing, the receiving end needs to remove [certain elements] before receiving the data. The impact.

[0073] The above text combined Figures 4 to 6 This paper provides an exemplary introduction to the principles and implementation block diagram of AFDM. Based on the above principles and implementation methods, AFDM has good performance in both communication and sensing, and will become a highly competitive technology in 6G in the future.

[0074] However, future 6G systems are expected to evolve smoothly based on the 5G architecture and industry chain. Therefore, it is necessary to integrate new waveforms such as AFDM into existing systems to achieve compatibility. For example, compatibility issues need to be carefully considered when integrating discrete AFDM into a 5G system. On the one hand, the integrated system can insert configurable phase rotation modules into the existing OFDM baseband processing chain, enabling it to flexibly switch waveform modes according to scenario requirements. On the other hand, the integrated system needs to unify the time-frequency resource grid, parameter sets (such as subcarrier spacing and cyclic prefix length), and frame structure to ensure that AFDM and OFDM can coexist on the same hardware platform and support hybrid waveform scheduling, thereby introducing performance gains for high-speed mobile scenarios in 6G while inheriting the 5G ecosystem.

[0075] As an example, when implementing AFDM based on a 5G system, or when integrating AFDM into a 5G system, the determination of AFDM waveform parameters and the design of key parameter transmission are issues that need to be considered.

[0076] To address the aforementioned issues, this application proposes a method for wireless communication. This method allows a first communication device (e.g., a terminal device or a network device) to determine at least one waveform parameter associated with a first waveform for a first transmission based on the first waveform. The first waveform differs from OFDM and DFT-s-OFDM waveforms; that is, the first waveform is a new waveform. Therefore, the waveform parameters of the new waveform can be determined by either the terminal device or the network device. This method can effectively coordinate the determination of waveform parameters by the network device or the terminal device and the related first transmission to suit data transmission requirements in different scenarios.

[0077] As an example, when the first waveform is integrated into an OFDM-based communication system, the terminal device or network device can determine, based on the actual communication scenario, a transmission not based on the OFDM waveform, such as a first transmission based on the first waveform. Once it is determined that the first transmission is necessary, the terminal device or network device can determine at least one waveform parameter related to the first waveform and decide whether to notify the network device or terminal device. Therefore, this application provides a method for determining and notifying key parameters when implementing a first waveform.

[0078] To facilitate understanding, the following will be combined with... Figure 7 The present application provides an exemplary description of the method for wireless communication proposed in its embodiments. Figure 7 The method shown is performed by a first communication device. The first communication device can be any of the terminal devices described above, such as a UE. The first communication device can also be any of the network devices described above, such as a base station.

[0079] As one implementation method, the first communication device can be Figure 1 Any of the terminal devices shown.

[0080] As one implementation, the first communication device can be a relay, such as a relay terminal or a network control relay.

[0081] As one implementation, the first communication device can be any one of the multiple TRPs.

[0082] As one implementation method, the first communication device can be Figure 1 The network device 110 shown.

[0083] The first communication device can communicate with the second communication device. When the first communication device is a terminal device, the second communication device can be a network device or other terminal device. When the first communication device is a network device, the second communication device can be a terminal device.

[0084] In some implementations, the first communication device can transmit and receive signals with the second communication device. For example, the first communication device receives or transmits signals, while the second communication device transmits or receives signals.

[0085] In one implementation, data / signaling can be transmitted between the first and second communication devices. For example, the first communication device sends data / signaling, and the second communication device receives the data / signaling. Alternatively, the second communication device sends data / signaling, and the first communication device receives the data / signaling.

[0086] In one implementation, when the first communication device is a terminal device, the network device, acting as the second communication device, can provide services to the serving cell where the first communication device resides. This serving cell can be an NTN cell or a terrestrial network cell; there is no limitation here. For example, the first communication device may be a UE in an NTN cell, and the second communication device may be a satellite covering that NTN cell. Alternatively, the first and second communication devices may be a terminal and a base station interacting in a 6G communication system or other future communication systems, respectively.

[0087] As one implementation, when the first communication device is a network device, the terminal device, acting as the second communication device, can be located within the cell served by the first communication device. This cell can be an NTN cell or a terrestrial network cell; there is no limitation here. For example, the first communication device could be a satellite covering an NTN cell, and the second communication device could be a UE within that NTN cell. Alternatively, the first and second communication devices could be a base station and a terminal interacting in a 6G communication system or other future communication systems, respectively.

[0088] Figure 7 The method shown includes step S710, which will be described below. It should be noted that the wireless communication method proposed in this application includes, but is not limited to, this step.

[0089] See Figure 7 In step S710, the first communication device determines at least one waveform parameter associated with the first waveform.

[0090] The first waveform can be any waveform different from OFDM and DFT-s-OFDM waveforms. For example, the first waveform could be an OTFS waveform. Or, the first waveform could be an AFDM waveform. Or, the first waveform could be any new waveform that is available for future communication systems.

[0091] At least one waveform parameter associated with the first waveform can be understood as one or more waveform parameters used for modulation or demodulation of the first waveform. As one implementation, when the first waveform is an AFDM waveform, the at least one waveform parameter includes one or more waveform parameters used for AFDM waveform modulation or demodulation, such as the affine Fourier transform parameters c1 and / or c2 mentioned above. As another implementation, when the first waveform is an OTFS waveform, the at least one waveform parameter includes one or more waveform parameters used for OTFS waveform modulation or demodulation.

[0092] As one implementation, the characteristics of at least one waveform parameter are related to the type of the first waveform. For example, when the first waveform is an AFDM waveform, at least one waveform parameter can be a parameter related to the affine Fourier transform. Similarly, when the first waveform is an OTFS waveform, at least one waveform parameter can be a parameter related to time-frequency spatial modulation.

[0093] As one implementation, the number of at least one waveform parameter is related to the type of the first waveform. For example, when the first waveform is an AFDM waveform, the at least one waveform parameter can be one waveform parameter or two waveform parameters.

[0094] In some implementations, at least one waveform parameter includes affine Fourier transform parameters c1 and / or c2. Exemplarily, c1 is related to the sweep slope of the linear frequency modulated (LFM) signal. The LFM signal is, for example, the chirp signal mentioned earlier. Exemplarily, c2 is related to the sweep slope of the LFM signal.

[0095] As one implementation, at least one waveform parameter includes the affine Fourier transform parameter c1.

[0096] As one implementation, at least one waveform parameter includes the affine Fourier transform parameter c2.

[0097] As one implementation, at least one waveform parameter includes affine Fourier transform parameters c1 and c2.

[0098] In some implementations, at least one waveform parameter can be determined based on at least one of the following: channel estimation results; protocol predefined information; channel quality-related parameters; and location information of the terminal device.

[0099] It should be noted that the first waveform can be used to determine which parameters constitute at least one waveform parameter. At least one of the aforementioned channel estimation results, protocol predefined information, channel quality-related parameters, and terminal device location information can be used to determine the value of at least one waveform parameter, or to determine which parameters are included in at least one waveform parameter. For example, for different first waveforms, the protocol predefined information can respectively indicate the waveform parameters related to the first waveform and their corresponding reference values.

[0100] As one implementation, the channel estimation result can be used to determine the value of at least one waveform parameter. That is, the first communication device can perform channel estimation and determine the value of each of the at least one waveform parameter based on the channel estimation result. For example, a terminal device can perform channel estimation and determine the values ​​of c1 and / or c2 based on the channel estimation result. Similarly, a network device can perform channel estimation and determine the values ​​of c1 and / or c2 based on the channel-estimated parameters. Alternatively, the terminal device can inform the network device of the obtained channel estimation result, and the network device can determine the values ​​of c1 and / or c2 based on the channel estimation result.

[0101] As one implementation, the channel estimation result can be an uplink channel estimate, a downlink channel estimate, or a side-channel estimate. For example, a terminal device acting as the first communication device can determine the downlink channel estimate. Similarly, a network device acting as the first communication device can determine the uplink channel estimate. Furthermore, when the first and second communication devices are two terminal devices, either terminal device can determine the side-channel estimate.

[0102] As one implementation, the channel estimation results may include one or more channel state information (CSI) such as precoding matrix indicator (PMI), rank indicator (RI), and channel quality indicator (CQI), without limitation.

[0103] For example, network devices or terminal devices can determine the values ​​of c1 and / or c2 based on the values ​​of PMI / RI.

[0104] For example, when at least one waveform parameter includes c2, the value of RI in the channel estimation result can be used to determine c2. That is, the value of c2 is related to the rank. For instance, the value of c2 differs in cases of lower and higher rank.

[0105] As one implementation approach, the channel estimation result can be determined based on the support of multiple antennas. For example, the terminal device can determine the channel parameters based on the support of multiple antennas, thereby determining the values ​​of c1 and / or c2.

[0106] As one implementation, at least one waveform parameter can adopt a value predefined by the protocol. That is, the protocol predefined information can indicate one or more preset values ​​for at least one waveform parameter, or indicate parameters used to determine at least one waveform parameter. For example, c1 and / or c2 can adopt preset values ​​in the standard. Alternatively, c1 and / or c2 can be determined based on parameters preset by the protocol.

[0107] As an example, since standard preset values ​​cannot be adjusted to actual changes, protocol predefined information can bind at least one waveform parameter to one or more parameters. A first communication device can determine the value of at least one waveform parameter associated with a first waveform based on these one or more parameters. These one or more parameters may be, for example, preamble sequences, or parameters or numbers of pilot sequences.

[0108] As one implementation, the channel quality-related parameters can be any parameter indicating channel quality. For example, reference signal received power (RSRP), signal-to-noise ratio (SNR), reference signal received quality (RSRQ), etc., are not limited to this. For instance, the first communication device can determine the values ​​of c1 and / or c2 based on channel quality-related parameters such as RSRP, SNR, and RSRQ.

[0109] As one implementation method, the location information of the terminal device can reflect the area where the terminal device is located. In some scenarios, the waveform parameters related to the first waveform can take different values ​​for different areas within the cell. As an example, the location information of the terminal device can be determined based on the index of the synchronization signal block (SSB) received by the terminal device. The SSB index can reflect the area where the user is located. Therefore, the waveform parameters related to the first waveform can also be determined based on the SSB index. For example, the first communication device can determine the values ​​of c1 and / or c2 based on the SSB index.

[0110] It should be understood that SSB in the embodiments of this application may also represent synchronization signal and physical broadcast channel block (SS / PBCH block).

[0111] The first transmission based on a first waveform can be understood as the first transmission using the first waveform for sending or receiving. That is, the first transmission is an uplink or downlink transmission under the first waveform. At least one waveform parameter is used for the first transmission based on the first waveform; that is, the transmitter of the first transmission can modulate based on the at least one waveform parameter, and the receiver of the first transmission can detect and / or demodulate based on the at least one waveform parameter. For example, when the first waveform is an AFDM waveform, the transmitter of the first transmission can modulate based on c1 and c2, and the receiver can demodulate based on c1 and c2.

[0112] The first transmission can be data transmission or signaling transmission; this application does not limit either.

[0113] The first transmission can be an uplink transmission, a downlink transmission, or a side-link transmission; this application does not limit this.

[0114] The first transmission can be one or more transmissions based on the first waveform, and this application does not limit this.

[0115] As one implementation, the first transmission can be a transmission during a random access procedure. When any transmission during a random access procedure is performed based on the first waveform, the communicating devices may not be able to notify each other of specific waveform parameters. In this case, at least one waveform parameter associated with the first waveform can be determined based on protocol-predefined information.

[0116] For example, the first transmission could be message 3 during a random access process. When the terminal device sends message 3, it cannot yet notify the network device of the values ​​of c1 and / or c2. To ensure that the network device can receive the message correctly, c1 and / or c2 can use preset values ​​in the standard. The network device can determine c1 and / or c2 based on the preset values ​​in the standard, thereby performing detection and demodulation.

[0117] For example, the first transmission can be any transmission other than message 1 during the random access process. For instance, the first transmission can be message 2 or message 3 during the random access process. When the terminal device sends at least one waveform parameter via message 1, the network device can use that at least one waveform parameter for the first transmission (e.g., message 2). When the network device sends at least one waveform parameter via message 2, the terminal device can use that at least one waveform parameter for the first transmission (e.g., message 3).

[0118] As one implementation, the first transmission can be a transmission following a random access procedure. For example, after a terminal device accesses the network, the terminal device and the network device can communicate with the network device via higher-layer signaling to notify the network device of at least one waveform parameter related to the first waveform. Alternatively, when a first communication device and a second communication device maintain a communication connection, the first and second communication devices can send at least one waveform parameter related to the first waveform via control information or pilot sequences.

[0119] For example, the first transmission can be data transmission after the terminal device is in RRC connected state. The terminal device can notify the network device of the values ​​of c1 and / or c2 via RRC signaling. Only after the terminal device notifies the network device of the values ​​of c1 and / or c2 will the terminal device perform uplink transmission using AFDM waveform, i.e., the first transmission.

[0120] For example, the first transmission can be any one or more transmissions between a first communication device and a second communication device that maintain the connection.

[0121] Since the first transmission is modulated and demodulated based on at least one waveform parameter, both the transmitting and receiving ends of the first transmission need to obtain at least one waveform parameter. For example, both the transmitting and receiving ends of the first transmission need to obtain the values ​​of c1 and c2.

[0122] The first communication device determines the at least one waveform parameter, including either independently determining the at least one waveform parameter or participating in the determination of the at least one waveform parameter. The participation of the first communication device in determining the at least one waveform parameter can be understood as the first communication device jointly determining the at least one waveform parameter with other communication devices. For example, the first communication device jointly determines the at least one waveform parameter with a second communication device.

[0123] In one implementation, the first communication device can independently determine the at least one waveform parameter. When the first communication device is a terminal device, the value of the at least one waveform parameter is determined by the terminal device. For example, the values ​​of c1 and / or c2 can be determined on the UE side. When the first communication device is a network device, the value of the at least one waveform parameter is determined by the network device. For example, the values ​​of c1 and / or c2 can be determined on the base station side.

[0124] In one implementation, the first communication device can jointly determine the at least one waveform parameter with the second communication device. For example, the values ​​of c1 and / or c2 can be jointly determined on the terminal device side and the network device side.

[0125] As an example, a first communication device determines a candidate parameter set for at least one waveform parameter, and a second communication device selects a suitable waveform parameter from the candidate parameter set and informs the first communication device. Alternatively, the second communication device determines the candidate parameter set for the at least one waveform parameter, and the first communication device selects a suitable waveform parameter from the candidate parameter set and informs the second communication device.

[0126] As another example, the first communication device determines at least one waveform parameter and informs the second communication device, which then confirms the parameter before it can be used. Alternatively, the second communication device determines at least one waveform parameter and informs the first communication device, which then confirms the parameter before it can be used.

[0127] After the first communication device determines at least one waveform parameter, it may or may not notify the second communication device. The following description, using two embodiments, illustrates these two scenarios respectively.

[0128] Example 1 In Embodiment 1, a first communication device sends at least one waveform parameter to a second communication device. After determining the at least one waveform parameter, the first communication device sends the at least one waveform parameter to the second communication device. Wherein, when the first communication device is a terminal device, the second communication device is a network device. When the first communication device is a network device, the second communication device is a terminal device.

[0129] When the first communication device is a terminal device, at least one waveform parameter can be carried in the first information. The first information is used by the terminal device to send waveform parameters to the network device; therefore, the first information can also be called uplink information.

[0130] In some implementations, the first information may include at least one of the following: message 1 in the random access procedure; message 3 in the random access procedure; higher-layer signaling; uplink control information (UCI); pilot sequence.

[0131] As one implementation, when the first information is a message in the random access procedure, the transmission of at least one waveform parameter is performed during the random access process of the terminal device. The first information can be any uplink message in the random access procedure. For example, the first information can be message 1 and message 3 in a four-step random access procedure, or message A in a two-step random access procedure. In some scenarios, message 1 and / or message 3 in the random access procedure can be replaced by message A in the random access procedure.

[0132] As an example, message 1 in a random access procedure typically includes a preamble sequence. The preamble sequence can be bound to at least one waveform parameter. That is, different preamble sequences can correspond to different waveform parameters. The terminal device can implicitly indicate at least one waveform parameter associated with the first waveform by selecting the preamble sequence. For example, since standard preset values ​​cannot be adjusted with actual changes, the random access preamble sequence is bound to c1 and / or c2 in the protocol. After receiving the preamble sequence, the network device can determine the values ​​of c1 and / or c2.

[0133] As an example, when the first information is message 3 in the random access process, the value of at least one waveform parameter in the first information can match the actual situation. For example, when the terminal device sends message 3, it can use values ​​of c1 and / or c2 that match the actual situation.

[0134] As an example, during random access, the terminal device can send at least one waveform parameter determined according to predefined protocol information via message 1. Upon receiving message 2 from the network device, it then sends at least one waveform parameter matching the actual situation via message 3. Based on this method, the terminal device and the network device can jointly determine reasonable waveform parameters. For example, the terminal device can select an appropriate preamble sequence based on the SSB index and predefined protocol information to indicate at least one waveform parameter bound to that preamble sequence. Upon receiving message 2 responding to that preamble sequence, the terminal device can determine and send at least one waveform parameter matching the actual situation.

[0135] As one implementation, some or all of the waveform parameters in at least one waveform parameter can be notified via higher-layer signaling. For example, when a terminal device sends the results of c1 and / or c2 to a network device, since c1 is related to the Doppler frequency shift of the channel, and the Doppler frequency shift changes relatively slowly over time in satellite communication, c1 can be notified via higher-layer signaling.

[0136] In the above implementation, the higher-layer signaling can be RRC signaling. That is, the first communication device can send the value of at least one waveform parameter to the second communication device via RRC signaling. For example, after the terminal device connects, it can notify the network device of the values ​​of c1 and / or c2 via RRC signaling. Only after the terminal device notifies the network device of the values ​​of c1 and / or c2 will it use AFDM for uplink transmission.

[0137] As an implementation, at least one waveform parameter can be carried in a UCI or pilot sequence. To ensure a low peak-to-average power ratio (PAPR) in the transmitted data, some waveform parameters are determined based on each real-time data transmission. That is, each data point is different, and the corresponding waveform parameters are also different. Because the waveform parameters are adjusted in real time, and the receiver needs to know the waveform parameters to correctly demodulate the received signal, the transmitter needs to notify the receiver of the adjusted waveform parameters in real time. Both UCI and pilot sequences have the capability for real-time notification.

[0138] In the above implementation, when waveform parameters are carried in a UCI or pilot sequence, at least one waveform parameter is associated with a modulation parameter. Alternatively, when at least one waveform parameter is associated with a modulation parameter, these waveform parameters can be carried in a UCI or pilot sequence to allow for timely sharing of waveform parameters in a more dynamic manner. For example, when c2 is associated with the modulation data transmitted each time, the terminal device needs to notify the network device of c2 in a more dynamic way, such as through a UCI or pilot sequence.

[0139] As one implementation, at least one waveform parameter is carried in the pilot sequence, including: at least one waveform parameter being carried in the index of the pilot sequence, or at least one waveform parameter being carried in the parameters of the pilot sequence. Having at least one waveform parameter carried in the index of the pilot sequence can be understood as different indices of the pilot sequence corresponding to different waveform parameters. Having at least one waveform parameter carried in the parameters of the pilot sequence can be understood as different parameters of the pilot sequence corresponding to different waveform parameters.

[0140] As an example, different parameters in the pilot sequence can correspond to different waveform parameters. Standards or relevant protocols can provide the correspondence between pilot sequence parameters and waveform parameters. For example, the correspondence between pilot sequence parameters and waveform parameters can be given in tabular form. Alternatively, pilot sequence parameters can be numbered, and these numbers can be mapped to waveform parameters. Or, the correspondence between pilot sequence parameters and waveform parameters can be expressed by formulas. The first communication device can then deduce the waveform parameters from the pilot sequence parameters using these formulas.

[0141] As another example, different waveform parameters can correspond to different pilot sequences in a set of pilot sequences. The sequence number or index of the pilot sequence in this set can be used to indicate different waveform parameters.

[0142] Since the first information is used to transmit at least one waveform parameter related to the first waveform, the receiving end is unaware of these parameters and cannot detect or demodulate them. Therefore, the first information can be transmitted based on the second waveform. The second waveform can be any waveform other than the first waveform. For example, if the first waveform is an AFDM waveform, the second waveform can be an OFDM waveform or a DFT-s-OFDM waveform.

[0143] As one implementation, when sending waveform parameters via message 3 in the random access procedure, the terminal device can use a method different from AFDM (first waveform), such as OFDM or DFT-s-OFDM, to send message 3. Because the terminal device cannot yet notify the network device of the values ​​of c1 and / or c2 at this point, it can use other waveform methods to ensure correct reception by the network device. The network device can then perform detection and demodulation according to these other waveform methods.

[0144] As an implementation, when the terminal device sends waveform parameters via UCI or pilot sequence, since the network device does not know the values ​​of c1 and / or c2, UCI may not use the first waveform (e.g., AFDM waveform).

[0145] The previous section introduced various methods for transmitting waveform parameters when the first communication device is a terminal device. The following section introduces various scenarios for transmitting waveform parameters when the first communication device is a network device. Although the transmission direction of waveform parameters differs, various implementation methods on the terminal device side can also be used on the network device side. Therefore, for the sake of brevity, the already explained terms or implementation methods will not be repeated.

[0146] When the first communication device is a network device, at least one waveform parameter can be carried in the second information. The second information is used by the network device to send waveform parameters to the terminal device; therefore, the second information can also be called downlink information.

[0147] In some implementations, the second information may include at least one of the following: indication information in the system information block (SIB); message 2 in the random access procedure; higher-layer signaling; downlink control information (DCI); and pilot sequence.

[0148] As one implementation, the SIB carrying at least one waveform parameter can be SIB1 or any other SIB. Network devices can transmit SIBs via broadcast. When a network device corresponds to a first cell, the indication information in the SIB can be valid for some or all terminal devices within the first cell. For example, a network device can use SIB1 to notify terminal devices of the values ​​of c1 and / or c2. The values ​​of c1 and / or c2 indicated in SIB1 are valid for some or all terminal devices within the cell.

[0149] As one implementation, message 2 in the random access procedure can be used by the network device to send a random access response. In some scenarios, message 2 in the random access procedure can be replaced by message B. For example, the network device can inform the terminal device of the values ​​of c1 and / or c2 in the random access response (i.e., message 2). After receiving the random access response, the terminal device uses the values ​​of c1 and / or c2 in its subsequent uplink transmissions (e.g., message 3).

[0150] As one implementation method, the second information can be higher-level signaling, such as RRC signaling, which will not be elaborated here.

[0151] As one implementation, at least one waveform parameter can be carried in a DCI or pilot sequence. As mentioned earlier, some waveform parameters are determined based on each real-time data transmission and therefore need to be sent dynamically. DCI also has real-time notification capabilities.

[0152] As one implementation, the second information may also include the modulation scheme or modulation parameters related to the first waveform. For example, after the network device determines the values ​​of c1 and / or c2, it can notify the terminal device along with the modulation scheme.

[0153] The preceding text described various implementations of a first communication device sending at least one waveform parameter to a second communication device. After the first communication device sends at least one waveform parameter to the second communication device, the first communication device can perform a first transmission according to a first time interval. When the first communication device is a terminal device, the terminal device can perform uplink transmission according to the first time interval. When the first communication device is a network device, the network device can perform downlink transmission according to the first time interval.

[0154] It should be understood that the first communication device performing the first transmission can be understood as the first communication device sending the first transmission to the second communication device, or the first communication device receiving the first transmission sent by the second communication device.

[0155] The first time interval can be understood as the interval between the time when the first communication device performs the first transmission and the time when it notifies the second communication device of at least one waveform parameter. For example, when the first communication device is a terminal device and the first waveform is an AFDM waveform, the first time interval is the time interval between the terminal device performing uplink transmission under the AFDM waveform and the terminal device notifying the network device of the values ​​related to c1 and / or c2.

[0156] As one implementation, the time for the first transmission by the first communication device can be the start time of the first transmission, the specified time of the first transmission, or the reference time of the first transmission; this application does not limit this.

[0157] As one implementation, the time when the first communication device notifies the second communication device of at least one waveform parameter can be the time of sending at least one waveform parameter, the relevant time of information or signaling used to carry at least one waveform parameter, or the time of receiving feedback information of at least one waveform parameter. This application does not limit this.

[0158] In the above implementation, the waveform parameter feedback information can be hybrid automatic repeat request (HARQ) feedback information or other signaling, without limitation. The HARQ feedback information can include HARQ acknowledgement (ACK) and HARQ negative acknowledgement (NACK).

[0159] As one implementation approach, the first time interval can be defined by a standard or protocol.

[0160] As one implementation, the first time interval can be one or more symbols, time slots, subframes, or frames, without limitation.

[0161] As one implementation, the unit of the first time interval can be milliseconds.

[0162] In some implementations, the first time interval is one of the following: the time interval between the time when the first communication device sends at least one waveform parameter and the start time of the first communication device performing the first transmission; the time interval between the time when the first communication device sends information carrying at least one waveform parameter and the start time of the first transmission; the time interval between the time when the first communication device receives feedback information of at least one waveform parameter and the start time of the first transmission.

[0163] It should be understood that the start time of the first transmission in the above implementation can be replaced with other relevant times of the first transmission, such as the scheduling time of the first transmission, the reference time of the first transmission, or the specified time of the first transmission.

[0164] As one implementation, the first time interval is the interval between the time when the first communication device sends at least one waveform parameter and the time when the first transmission is performed. For example, the first time interval is the time interval between the time when the first communication device sends at least one waveform parameter and the start time of the first transmission performed by the first communication device. For instance, when the first communication device is a terminal device and the first waveform is an AFDM waveform, the first time interval can be the interval between the terminal device performing uplink transmission under the AFDM waveform and the terminal device notifying the network device of the values ​​of c1 and / or c2.

[0165] As one implementation, the first time interval is the interval between the time when the first communication device sends the first information or the second information and the time when the first transmission is performed. For example, the first time interval is the interval between the time when the first communication device sends information carrying at least one waveform parameter (e.g., the first information) and the start time of the first transmission performed by the first communication device. For instance, when the first communication device is a terminal device and the first waveform is an AFDM waveform, the first time interval can be the interval between the terminal device performing uplink transmission under the AFDM waveform and the signaling by which the terminal device notifies the network device of the values ​​of c1 and / or c2.

[0166] As one implementation, the first time interval is the interval between the time when the first communication device receives feedback information of at least one waveform parameter and the time when it performs the first transmission. For example, the first time interval is the interval between the time when the first communication device receives feedback information of at least one waveform parameter and the start time of the first transmission performed by the first communication device. For instance, when the first communication device is a terminal device and the first waveform is an AFDM waveform, the first time interval can be the interval between the terminal device performing uplink transmission under the AFDM waveform and the terminal device receiving ACK / NACK feedback (such as HARQ-ACK) signaling for notifying network devices c1 and / or c2 of their values.

[0167] As one implementation, the first time interval can be several milliseconds. For example, when the first communication device is a terminal device and the first waveform is an AFDM waveform, the first subframe for uplink transmission under the AFDM waveform by the terminal device should be a subframe several milliseconds after receiving the ACK / NACK feedback signaling for notifying the values ​​of network devices c1 and / or c2. Alternatively, the first subframe should be a subframe several milliseconds after the terminal device receives the signaling for notifying the values ​​of network devices c1 and / or c2.

[0168] In some implementations, the first time interval is greater than or equal to a first threshold. The first threshold is used to indicate a duration. The first threshold can be determined based on protocol predefined information or network device configuration information.

[0169] For example, the standard for the interval between the uplink transmission of the terminal device under the AFDM waveform and the notification of the values ​​of c1 and / or c2 by the terminal device to the network device is defined as greater than or equal to a time, i.e., a first threshold.

[0170] For example, the standard for the interval between the uplink transmission of the terminal device under the AFDM waveform and the signaling of the terminal device notifying the network device of the values ​​of c1 and / or c2 is defined as greater than or equal to a time, i.e., a first threshold.

[0171] For example, the standard for the interval between the terminal device performing uplink transmission under AFDM waveform and the terminal device receiving ACK / NACK feedback signaling for notifying network devices c1 and / or c2 is defined as greater than or equal to a time, i.e., a first threshold.

[0172] For the second communication device, after receiving at least one waveform parameter related to the first waveform, the second communication device can perform a first transmission according to a second time interval. The second communication device performing the first transmission can be understood as the second communication device receiving a first transmission sent by the first communication device, or the second communication device sending a first transmission to the first communication device.

[0173] The second time interval can be understood as the interval between the time the second communication device performs the first transmission and the time it receives at least one waveform parameter. For example, when the second communication device is a network device and the first waveform is an AFDM waveform, the second time interval is the time interval between the network device performing downlink transmission under the AFDM waveform and receiving the values ​​of c1 and / or c2 notified by the terminal device.

[0174] As one implementation, the time for the second communication device to perform the first transmission can be the start time of the first transmission, the reception time of the first transmission, or the reference time of the first transmission; this application does not limit this.

[0175] As one implementation, the time when the second communication device receives at least one waveform parameter can be the reception time of at least one waveform parameter, the relevant time for information or signaling used to carry at least one waveform parameter, or the transmission time of feedback information of at least one waveform parameter. This application does not limit this.

[0176] As one implementation approach, the second time interval can be defined by a standard or protocol.

[0177] As one implementation, the second time interval can be one or more symbols, time slots, subframes, or frames, without limitation.

[0178] As one implementation, the unit of the second time interval can be milliseconds.

[0179] As one implementation, the second time interval can be related to the first time interval. For example, the second time interval may be determined based on the first time interval. Alternatively, the second time interval may be greater than or equal to the first time interval. Or, the second time interval may be less than the first time interval.

[0180] In some implementations, the second time interval is one of the following: the time interval between the time when the second communication device receives at least one waveform parameter and the start time of the first transmission of the second communication device; the time interval between the time when the second communication device receives information carrying at least one waveform parameter and the start time of the first transmission of the second communication device; the time interval between the time when the second communication device sends feedback information of at least one waveform parameter and the start time of the first transmission of the second communication device.

[0181] As one implementation, the second time interval is the time interval between the time when the second communication device receives at least one parameter and the time when the second communication device performs the first transmission.

[0182] As one implementation, the second time interval is the time interval between the time when the second communication device receives the first information or the second information and the time when the second communication device performs the first transmission.

[0183] As one implementation, the second time interval is the interval between the time when the second communication device sends feedback information of at least one waveform parameter and the time when the second communication device performs the first transmission.

[0184] In some implementations, the second time interval is greater than or equal to a second threshold. The second threshold is used to indicate a duration. The second threshold can be determined based on protocol predefined information or network device configuration information.

[0185] As one implementation, the second threshold can be related to the first threshold. For example, the second threshold can be determined based on the first threshold. Alternatively, the second threshold can be greater than or equal to the first threshold. Or, the second threshold can be less than the first threshold.

[0186] Therefore, Example 1 illustrates various implementation methods for terminal devices or network devices to determine and notify waveform parameters. Based on this, the system can effectively coordinate the operations of network devices and terminal devices to adapt to the transmission requirements based on the first waveform in different scenarios.

[0187] Example 2 In Embodiment 2, the first communication device and the second communication device do not transmit at least one waveform parameter related to the first waveform. For example, after the first communication device determines at least one waveform parameter, it may not notify the second communication device. In this case, the first and second communication devices can determine the at least one waveform parameter respectively for modulation and demodulation.

[0188] In some implementations, the first communication device and the second communication device can determine at least one waveform parameter based on the same information or strategy. For example, when the first communication device is a terminal device and the first waveform is an AFDM waveform, after the terminal device determines the values ​​of c1 and / or c2, the terminal device does not notify the network device of these values. The network device can determine the values ​​of c1 and / or c2 based on the same channel estimation results or protocol predefined information.

[0189] As an implementation, the information or strategy may include at least one of the following: channel estimation results; protocol predefined information; channel quality-related parameters; and location information of the terminal device.

[0190] In one implementation, after the first communication device determines at least one waveform parameter based on one or more parameters, it can send those parameters to the second communication device. These parameters may be channel estimation results. Since the communication devices themselves need to feedback channel state information, sending these parameters does not incur additional signaling overhead.

[0191] In one implementation, after the first communication device determines at least one waveform parameter based on the third information, the first communication device can explicitly or implicitly indicate the third information to the second communication device. The third information can be existing signaling bound to at least one waveform parameter; in this case, sending the third information will not incur additional signaling overhead.

[0192] As one implementation, the first and second communication devices can determine the at least one waveform parameter based on models deployed at the receiving and transmitting ends, respectively. The models deployed at the receiving and transmitting ends can be trained together.

[0193] As an example, the terminal device does not inform the network device of the values ​​of c1 and / or c2, and the network device does not inform the terminal device of the values ​​of c1 and / or c2. The terminal device and the network device can determine c1 and / or c2 based on the same parameters. These same parameters may include, for example, channel estimation results, channel quality-related parameters, and the location information of the terminal device.

[0194] In some implementations, after the first communication device and the second communication device have determined at least one waveform parameter, they can confirm the first transmission based on the first waveform by means of request confirmation signaling and / or confirmation response signaling.

[0195] Therefore, Example 2 illustrates various implementation methods for terminal devices and network devices to determine waveform parameters separately. Since it is not necessary to send waveform parameters, signaling overhead can be reduced to a certain extent.

[0196] The above text combined Figure 7 This paper introduces various methods for determining and notifying key parameters when implementing the first waveform (e.g., AFDM waveform). The design using this method can effectively coordinate the operation of network devices and terminal devices and is suitable for data transmission requirements in different scenarios. For ease of understanding, the following section combines... Figure 8 and Figure 9 The implementation methods of the above two embodiments will be described by way of example. Figure 8 and Figure 9 Taking the first waveform as an example, where the first communication device is an AFDM waveform, the second communication device is a network device.

[0197] Figure 8 A flowchart illustrating the process of determining at least one waveform parameter for a terminal device and notifying the network device.

[0198] See Figure 8 In step S810, the terminal device determines the values ​​of c1 and / or c2.

[0199] In step S820, the terminal device sends the values ​​of c1 and / or c2 to the network device. The values ​​of c1 and / or c2 can be carried in the first information. As can be seen from Embodiment 1, if the network device sends the values ​​of c1 and / or c2, these values ​​can be carried in the second information.

[0200] In step S830, the terminal device and the network device perform the first transmission under the AFDM waveform, that is, the first transmission based on the first waveform.

[0201] Figure 9 This is a schematic diagram illustrating a process where terminal devices and network devices do not communicate at least one waveform parameter.

[0202] See Figure 9 In steps S910 and S920, the terminal device and the network device determine the values ​​of c1 and / or c2, respectively. As can be seen from Embodiment 2, the terminal device and the network device can determine the values ​​of c1 and / or c2 based on the same information or strategy.

[0203] In step S930, the terminal device and the network device perform the first transmission under the AFDM waveform.

[0204] The above text combined Figures 1 to 9 The method embodiments of this application are described in detail below. Figures 10 to 12 The present application provides a detailed description of the apparatus embodiments. It should be understood that the descriptions of the apparatus embodiments correspond to the descriptions of the method embodiments; therefore, any parts not described in detail can be found in the foregoing method embodiments.

[0205] Figure 10 This is a schematic block diagram of an apparatus for wireless communication according to an embodiment of this application. The apparatus 1000 can be the first communication device described above. The first communication device may include a transceiver, a memory, and a processor. The memory stores programs. The processor invokes the programs in the memory and controls the transceiver to receive or transmit signals, causing the first communication device to execute the methods described above. The first communication device can be any of the terminal devices or network devices described above. Figure 10 The apparatus 1000 shown includes a determining unit 1010.

[0206] The determining unit 1010 can be used to determine at least one waveform parameter related to a first waveform; wherein the at least one waveform parameter is used to perform a first transmission based on the first waveform, the first waveform being different from OFDM waveforms and DFT-s-OFDM waveforms, and the first communication device being a terminal device or a network device.

[0207] Optionally, the first waveform is an AFDM waveform.

[0208] Optionally, the at least one waveform parameter is determined based on at least one of the following: channel estimation results; protocol predefined information; channel quality related parameters; and the location information of the terminal device.

[0209] Optionally, the at least one waveform parameter includes an affine Fourier transform parameter c2, which is related to the sweep slope of the linear frequency modulated signal, and the channel estimation result includes RI, the value of which is used to determine c2.

[0210] Optionally, the location information of the terminal device is determined based on the index of the synchronization signal block received by the terminal device.

[0211] Optionally, the device 1000 further includes a first transceiver unit, which can be used to send the at least one waveform parameter to a second communication device; wherein, when the first communication device is the terminal device, the second communication device is a network device; and when the first communication device is the network device, the second communication device is a terminal device.

[0212] Optionally, the first communication device is the terminal device, and the at least one waveform parameter is carried in the first information, which includes at least one of the following: message 1 in the random access process; message 3 in the random access process; higher layer signaling; UCI; pilot sequence.

[0213] Optionally, message 1 includes a preamble sequence that is bound to the at least one waveform parameter.

[0214] Optionally, the higher-layer signaling is RRC signaling.

[0215] Optionally, the at least one waveform parameter is carried in the UCI or the pilot sequence, and the at least one waveform parameter is related to the modulation parameter.

[0216] Optionally, the at least one waveform parameter is carried in the pilot sequence, including: the at least one waveform parameter is carried in the sequence number of the pilot sequence, or the at least one waveform parameter is carried in the parameters of the pilot sequence.

[0217] Optionally, the first information is transmitted based on a second waveform, which is any waveform other than the first waveform.

[0218] Optionally, the first communication device is the network device, and the at least one waveform parameter is carried in the second information, which includes at least one of the following: indication information in the SIB; message 2 in the random access procedure; higher layer signaling; DCI; pilot sequence.

[0219] Optionally, the network device corresponds to a first cell, and the indication information in the SIB is valid for some or all terminal devices within the first cell.

[0220] Optionally, the second information may also include the modulation scheme or modulation parameters related to the first waveform.

[0221] Optionally, the device 1000 further includes a second transceiver unit, which can be used to perform the first transmission according to a first time interval after sending the at least one waveform parameter to the second communication device.

[0222] Optionally, the first time interval is one of the following: the time interval between the time when the first communication device sends the at least one waveform parameter and the start time of the first communication device performing the first transmission; the time interval between the time when the first communication device sends information carrying the at least one waveform parameter and the start time of the first communication device performing the first transmission; the time interval between the time when the first communication device receives feedback information of the at least one waveform parameter and the start time of the first communication device performing the first transmission.

[0223] Optionally, the first time interval is greater than or equal to a first threshold, which is determined based on protocol predefined information or network device configuration information.

[0224] Optionally, the at least one waveform parameter includes affine Fourier transform parameters c1 and / or c2, wherein c1 is related to the sweep slope of the linear frequency modulated signal, and c2 is related to the sweep slope of the linear frequency modulated signal.

[0225] Optionally, the determining unit 1010 in the device 1000 may be a processor 1210, and the device 1000 may also include a memory 1220 and a transceiver 1230, specifically as follows: Figure 12 As shown.

[0226] Figure 11 This is a schematic block diagram of another device for wireless communication according to an embodiment of this application. The device 1100 can be the second communication device described above. The second communication device may include a transceiver, a memory, and a processor. The memory stores programs. The processor invokes the programs in the memory and controls the transceiver to receive or transmit signals, causing the second communication device to execute the methods described above. The second communication device can be any network device or terminal device that communicates with the first communication device. Figure 11 The device 1100 shown includes a transceiver unit 1110.

[0227] The transceiver unit 1110 is configured to receive at least one waveform parameter related to a first waveform; wherein the at least one waveform parameter comes from a first communication device, and the at least one waveform parameter is used to perform a first transmission based on the first waveform, the first waveform being different from OFDM waveforms and DFT-s-OFDM waveforms; when the first communication device is a terminal device, the second communication device is a network device; when the first communication device is a network device, the second communication device is a terminal device.

[0228] Optionally, the first waveform is an AFDM waveform.

[0229] Optionally, the at least one waveform parameter is determined based on at least one of the following: channel estimation results; protocol predefined information; channel quality related parameters; and the location information of the terminal device.

[0230] Optionally, the at least one waveform parameter includes an affine Fourier transform parameter c2, which is related to the sweep slope of the linear frequency modulated signal, and the channel estimation result includes RI, the value of which is used to determine c2.

[0231] Optionally, the location information of the terminal device is determined based on the index of the synchronization signal block received by the terminal device.

[0232] Optionally, the first communication device is the terminal device, and the at least one waveform parameter is carried in the first information, which includes at least one of the following: message 1 in the random access process; message 3 in the random access process; higher layer signaling; UCI; pilot sequence.

[0233] Optionally, message 1 includes a preamble sequence that is bound to the at least one waveform parameter.

[0234] Optionally, the higher-layer signaling is RRC signaling.

[0235] Optionally, the at least one waveform parameter is carried in the UCI or the pilot sequence, and the at least one waveform parameter is related to the modulation parameter.

[0236] Optionally, the at least one waveform parameter is carried in the pilot sequence, including: the at least one waveform parameter is carried in the sequence number of the pilot sequence, or the at least one waveform parameter is carried in the parameters of the pilot sequence.

[0237] Optionally, the first information is transmitted based on a second waveform, which is any waveform other than the first waveform.

[0238] Optionally, the first communication device is the network device, and the at least one waveform parameter is carried in the second information, which includes at least one of the following: indication information in the SIB; message 2 in the random access procedure; higher layer signaling; DCI; pilot sequence.

[0239] Optionally, the network device corresponds to a first cell, and the indication information in the SIB is valid for some or all terminal devices within the first cell.

[0240] Optionally, the second information may also include the modulation scheme or modulation parameters related to the first waveform.

[0241] Optionally, the transceiver unit is further configured to perform the first transmission according to a second time interval after receiving at least one waveform parameter associated with the first waveform.

[0242] Optionally, the second time interval is one of the following: the time interval between the time when the second communication device receives the at least one waveform parameter and the start time of the first transmission of the second communication device; the time interval between the time when the second communication device receives information carrying the at least one waveform parameter and the start time of the first transmission of the second communication device; the time interval between the time when the second communication device sends feedback information of the at least one waveform parameter and the start time of the first transmission of the second communication device.

[0243] Optionally, the second time interval is greater than or equal to a second threshold, which is determined based on protocol predefined information or network device configuration information.

[0244] Optionally, the at least one waveform parameter includes affine Fourier transform parameters c1 and / or c2, wherein c1 is related to the sweep slope of the linear frequency modulated signal, and c2 is related to the sweep slope of the linear frequency modulated signal.

[0245] Optionally, the transceiver unit 1110 in device 1100 can be a transceiver 1230, and device 1100 may also include a processor 1210 and a memory 1220, specifically as follows: Figure 12 As shown.

[0246] Figure 12 The diagram shown is a structural schematic of a communication device according to an embodiment of this application. Figure 12 The dashed lines indicate that the unit or module is optional. The device 1200 can be used to implement the methods described in the above method embodiments. The device 1200 can be a chip, a terminal device, or a network device.

[0247] Apparatus 1200 may include one or more processors 1210. The processor 1210 may support apparatus 1200 in implementing the methods described in the preceding method embodiments. The processor 1210 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be 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. The general-purpose processor may be a microprocessor or any conventional processor.

[0248] The apparatus 1200 may further include one or more memories 1220. The memories 1220 store a program that can be executed by the processor 1210, causing the processor 1210 to perform the methods described in the preceding method embodiments. The memories 1220 may be independent of the processor 1210 or integrated within the processor 1210.

[0249] The device 1200 may also include a transceiver 1230. The processor 1210 can communicate with other devices or chips via the transceiver 1230. For example, the processor 1210 can send and receive data with other devices or chips via the transceiver 1230.

[0250] 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 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.

[0251] 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 medium 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)).

[0252] 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 the embodiments of this application, 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.

[0253] 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.

[0254] 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 various embodiments of this application.

[0255] In this application, the terms "system" and "network" are used interchangeably. Furthermore, the terminology used in this application is only for explaining specific embodiments of the application and is not intended to limit the 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.

[0256] In the embodiments of this application, a "field" may also be referred to as a "domain," "subdomain," or "subfield." A field may occupy one or more bytes (bytes / octets), or a field may occupy one or more bits (bits).

[0257] 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.

[0258] In the embodiments of this application, the term "correspondence" may 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.

[0259] In the embodiments of this application, "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.

[0260] In the embodiments of this application, the term "protocol" may refer to standard protocols in the field of communications, such as LTE protocols, NR protocols, and related protocols applied in future communication systems. This application does not limit the scope of these protocols.

[0261] In the embodiments of this application, determining B based on A does not mean determining B solely based on A; B can also be determined based on A and / or other information.

[0262] 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.

[0263] In the embodiments of this application, "comprising" can refer to direct inclusion or indirect inclusion. Optionally, "comprising" mentioned in the embodiments of this application can be replaced with "indicating" or "used to determine". For example, "A includes B" can be replaced with "A indicates B" or "A is used to determine B".

[0264] In the embodiments of this application, the order of the above-mentioned process numbers 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.

[0265] 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.

[0266] 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.

[0267] 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.

[0268] 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 first communication device determines at least one waveform parameter related to the first waveform; Wherein, the at least one waveform parameter is used to perform a first transmission based on the first waveform, the first waveform being different from the Orthogonal Frequency Division Multiplexing (OFDM) waveform and the Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform, and the first communication device is a terminal device or a network device.

2. The method according to claim 1, characterized in that, The first waveform is an analog radio frequency multiplexing (AFDM) waveform.

3. The method according to claim 1 or 2, characterized in that, The at least one waveform parameter is determined based on at least one of the following: channel estimation results; protocol predefined information; channel quality related parameters; and the location information of the terminal device.

4. The method according to claim 3, characterized in that, The at least one waveform parameter includes an affine Fourier transform parameter c2, which is related to the sweep slope of the linear frequency modulated signal, and the channel estimation result includes a rank indicator RI, the value of which is used to determine c2.

5. The method according to claim 3 or 4, characterized in that, The location information of the terminal device is determined based on the index of the synchronization signal block received by the terminal device.

6. The method according to any one of claims 1-5, characterized in that, The method further includes: The first communication device sends the at least one waveform parameter to the second communication device; Wherein, when the first communication device is the terminal device, the second communication device is a network device; when the first communication device is the network device, the second communication device is a terminal device.

7. The method according to claim 6, characterized in that, The first communication device is the terminal device, and the at least one waveform parameter is carried in the first information, which includes at least one of the following: Message 1 during the random access process; Message 3 during the random access process; High-level signaling; Uplink Control Information (UCI); Pilot sequence.

8. The method according to claim 7, characterized in that, The message 1 includes a preamble sequence that is bound to the at least one waveform parameter.

9. The method according to claim 7 or 8, characterized in that, The higher-layer signaling is Radio Resource Control (RRC) signaling.

10. The method according to any one of claims 7-9, characterized in that, The at least one waveform parameter is carried in the UCI or the pilot sequence, and the at least one waveform parameter is related to the modulation parameter.

11. The method according to claim 10, characterized in that, The at least one waveform parameter is carried in the pilot sequence, including: the at least one waveform parameter is carried in the sequence number of the pilot sequence, or the at least one waveform parameter is carried in the parameters of the pilot sequence.

12. The method according to any one of claims 7-11, characterized in that, The first information is transmitted based on a second waveform, which is any waveform other than the first waveform.

13. The method according to claim 6, characterized in that, The first communication device is the network device, and the at least one waveform parameter is carried in the second information, which includes at least one of the following: Indication information in the System Information Block (SIB); Message 2 during the random access process; High-level signaling; Downlink Control Information (DCI); Pilot sequence.

14. The method according to claim 13, characterized in that, The network device corresponds to the first cell, and the indication information in the SIB is valid for some or all terminal devices in the first cell.

15. The method according to claim 13 or 14, characterized in that, The second information also includes the modulation method or modulation parameters related to the first waveform.

16. The method according to any one of claims 6-15, characterized in that, After the first communication device sends the at least one waveform parameter to the second communication device, the method further includes: The first communication device performs the first transmission according to the first time interval.

17. The method according to claim 16, characterized in that, The first time interval is one of the following: The time interval between the time when the first communication device sends the at least one waveform parameter and the start time of the first communication device performing the first transmission; The time interval between the time when the first communication device sends information carrying at least one waveform parameter and the start time of the first communication device performing the first transmission; The time interval between the time when the first communication device receives feedback information of the at least one waveform parameter and the time when the first communication device starts the first transmission.

18. The method according to claim 16 or 17, characterized in that, The first time interval is greater than or equal to a first threshold, which is determined based on protocol predefined information or network device configuration information.

19. The method according to any one of claims 1-18, characterized in that, The at least one waveform parameter includes affine Fourier transform parameters c1 and / or c2, wherein c1 is related to the sweep slope of the linear frequency modulated signal, and c2 is related to the sweep slope of the linear frequency modulated signal.

20. A method for wireless communication, characterized in that, include: The second communication device receives at least one waveform parameter related to the first waveform; Wherein, the at least one waveform parameter comes from the first communication device, and the at least one waveform parameter is used to perform a first transmission based on the first waveform, wherein the first waveform is different from the Orthogonal Frequency Division Multiplexing (OFDM) waveform and the Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform; when the first communication device is a terminal device, the second communication device is a network device; when the first communication device is a network device, the second communication device is a terminal device.

21. The method according to claim 20, characterized in that, The first waveform is an analog radio frequency multiplexing (AFDM) waveform.

22. The method according to claim 20 or 21, characterized in that, The at least one waveform parameter is determined based on at least one of the following: channel estimation results; protocol predefined information; channel quality related parameters; and the location information of the terminal device.

23. The method according to claim 22, characterized in that, The at least one waveform parameter includes an affine Fourier transform parameter c2, which is related to the sweep slope of the linear frequency modulated signal, and the channel estimation result includes a rank indicator RI, the value of which is used to determine c2.

24. The method according to claim 22 or 23, characterized in that, The location information of the terminal device is determined based on the index of the synchronization signal block received by the terminal device.

25. The method according to any one of claims 20-24, characterized in that, The first communication device is the terminal device, and the at least one waveform parameter is carried in the first information, which includes at least one of the following: Message 1 during the random access process; Message 3 during the random access process; High-level signaling; Uplink Control Information (UCI); Pilot sequence.

26. The method according to claim 25, characterized in that, The message 1 includes a preamble sequence that is bound to the at least one waveform parameter.

27. The method according to claim 25 or 26, characterized in that, The higher-layer signaling is Radio Resource Control (RRC) signaling.

28. The method according to any one of claims 25-27, characterized in that, The at least one waveform parameter is carried in the UCI or the pilot sequence, and the at least one waveform parameter is related to the modulation parameter.

29. The method according to claim 28, characterized in that, The at least one waveform parameter is carried in the pilot sequence, including: the at least one waveform parameter is carried in the sequence number of the pilot sequence, or the at least one waveform parameter is carried in the parameters of the pilot sequence.

30. The method according to any one of claims 25-29, characterized in that, The first information is transmitted based on a second waveform, which is any waveform other than the first waveform.

31. The method according to claim 30, characterized in that, The first communication device is the network device, and the at least one waveform parameter is carried in the second information, which includes at least one of the following: Indication information in the System Information Block (SIB); Message 2 during the random access process; High-level signaling; Downlink Control Information (DCI); Pilot sequence.

32. The method according to claim 31, characterized in that, The network device corresponds to the first cell, and the indication information in the SIB is valid for some or all terminal devices in the first cell.

33. The method according to claim 31 or 32, characterized in that, The second information also includes the modulation method or modulation parameters related to the first waveform.

34. The method according to any one of claims 20-33, characterized in that, After the second communication device receives at least one waveform parameter related to the first waveform, the method further includes: The second communication device performs the first transmission according to the second time interval.

35. The method according to claim 34, characterized in that, The second time interval is one of the following: The time interval between the time when the second communication device receives the at least one waveform parameter and the start time of the first transmission by the second communication device; The time interval between the time when the second communication device receives information carrying the at least one waveform parameter and the start time of the first transmission by the second communication device; The time interval between the time when the second communication device sends the feedback information of the at least one waveform parameter and the time when the second communication device starts the first transmission.

36. The method according to claim 34 or 35, characterized in that, The second time interval is greater than or equal to the second threshold, which is determined based on protocol predefined information or network device configuration information.

37. The method according to any one of claims 20-36, characterized in that, The at least one waveform parameter includes affine Fourier transform parameters c1 and / or c2, wherein c1 is related to the sweep slope of the linear frequency modulated signal, and c2 is related to the sweep slope of the linear frequency modulated signal.

38. A device for wireless communication, characterized in that, The device is a first communication device, which includes a transceiver, a memory, and a processor. The memory is used to store a program, and the processor is used to call the program in the memory and control the transceiver to receive or send signals so that the first communication device performs the method as described in any one of claims 1-19.

39. A device for wireless communication, characterized in that, The device is a second communication device, which includes a transceiver, a memory, and a processor. The memory is used to store a program, and the processor is used to call the program in the memory and control the transceiver to receive or send signals so that the second communication device performs the method as described in any one of claims 20-37.

40. A communication device, characterized in that, It includes a memory and a processor, the memory being used to store a program, and the processor being used to invoke the program in the memory to perform the method as described in any one of claims 1-19 or 20-37.

41. An apparatus, characterized in that, Includes a processor for calling a program from memory to perform the method as described in any one of claims 1-19 or 20-37.

42. 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 as described in any one of claims 1-19 or 20-37.

43. A computer-readable storage medium, characterized in that, It contains a program that causes a computer to perform the method as described in any one of claims 1-19 or 20-37.

44. A computer program product, characterized in that, Includes a program that causes a computer to perform the method as described in any one of claims 1-19 or 20-37.

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