Method, terminal device and network device for wireless communication

Abstract

Provided are a method, a terminal device, and a network device for wireless communication. The method includes determining, by the terminal device, a target uplink waveform from a plurality of uplink waveforms, wherein the target uplink waveform is used for uplink communication between the terminal device and the network device. The terminal device determines the used uplink waveform from the plurality of uplink waveforms, which can improve flexibility of waveform switching.

Description

[0001] This application is a divisional application of the application filed on September 30, 2022, with application number 202280100450.0 and titled "Method, Terminal Equipment and Network Equipment for Wireless Communication". Technical Field

[0002] This application relates to the field of communication technology, specifically to a wireless communication method, terminal device, and network device. Background Technology

[0003] Terminal devices can support multiple uplink waveforms. In related technologies, the type of uplink waveform used by terminal devices is based on semi-static configuration and cannot be flexibly switched. Summary of the Invention

[0004] This application provides a wireless communication method, terminal device, and network device. The various aspects involved in this application's embodiments are described below.

[0005] In a first aspect, a wireless communication method is provided, comprising: a terminal device determining a target uplink waveform from a plurality of uplink waveforms, wherein the target uplink waveform is used for uplink communication between the terminal device and a network device.

[0006] In a second aspect, a wireless communication method is provided, comprising: a network device receiving uplink data from a terminal device according to a target uplink waveform, wherein the target uplink waveform is a waveform determined by the terminal device from a plurality of uplink waveforms for uplink communication with the network device.

[0007] Thirdly, a terminal device is provided, comprising: a determining module, configured to determine a target uplink waveform from a plurality of uplink waveforms, wherein the target uplink waveform is used for uplink communication between the terminal device and a network device.

[0008] Fourthly, a network device is provided, comprising: a first receiving module, configured to receive uplink data from a terminal device according to a target uplink waveform, wherein the target uplink waveform is a waveform determined by the terminal device from a plurality of uplink waveforms for uplink communication with the network device.

[0009] Fifthly, a terminal device is provided, including a memory and a processor, wherein the memory is used to store a program, and the processor is used to invoke the program in the memory, causing the terminal device to perform the method as described in the first aspect.

[0010] In a sixth aspect, a network 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 cause the network device to perform the method as described in the second aspect.

[0011] A seventh aspect provides an apparatus including a processor for calling a program from a memory, causing the apparatus to perform the method as described in the first or second aspect.

[0012] Eighth aspect, a chip is provided, including a processor for calling a program from memory, causing a device having the chip mounted to perform the method as described in the first or second aspect.

[0013] A ninth aspect provides a computer-readable storage medium having a program stored thereon that causes a computer to perform the method as described in the first or second aspect.

[0014] A tenth aspect provides a computer program product, including a program that causes a computer to perform the method as described in the first or second aspect.

[0015] Eleventhly, a computer program is provided that causes a computer to perform the method as described in the first or second aspect.

[0016] Terminal devices can determine the uplink waveform from multiple uplink waveforms, which can improve the flexibility of waveform switching. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a communication system applicable to embodiments of this application.

[0018] Figure 2 This is a schematic diagram illustrating the waveform processing of two waveforms involved in the embodiments of this application.

[0019] Figure 3 This is a schematic flowchart illustrating a wireless communication method provided in one embodiment of this application.

[0020] Figure 4 for Figure 3 An example diagram illustrating one possible implementation of the method shown.

[0021] Figure 5 An example diagram of a communication process based on first indication information (such as waveform indication information) provided for embodiments of this application.

[0022] Figure 6 A schematic flowchart illustrating a wireless communication method provided in another embodiment of this application.

[0023] Figure 7 An example diagram of a communication process based on a first request (such as a waveform switching request) provided for embodiments of this application.

[0024] Figure 8 This is a schematic diagram of the structure of a terminal device provided in an embodiment of this application.

[0025] Figure 9 This is a schematic diagram of the network device provided in an embodiment of this application.

[0026] Figure 10 This is a schematic diagram of the device provided in an embodiment of this application. Detailed Implementation

[0027] The embodiments of this application can be applied to various communication systems. For example, the embodiments of this application can be applied to Global System for Mobile Communication (GSM), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), General Packet Radio Service (GPRS), Long Term Evolution (LTE), Advanced Long Term Evolution (LTE-A), New Radio (NR), evolution systems of NR, LTE-based access to unlicensed spectrum (LTE-U), NR-based access to unlicensed spectrum (NR-U), Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), and 5th-generation (5G) systems. The embodiments of this application can also be applied to other communication systems, such as future communication systems. The future communication system could be, for example, a 6th-generation (6G) mobile communication system or a satellite communication system.

[0028] Traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, communication systems can now support not only traditional cellular communication but also one or more other types of communication. For example, a communication system can support one or more of the following communication methods: device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, and vehicle-to-everything (V2X) communication. The embodiments of this application can also be applied to communication systems that support the above-mentioned communication methods.

[0029] 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.

[0030] The communication system in this application embodiment can be applied to unlicensed spectrum. This unlicensed spectrum can also be considered a shared spectrum. Alternatively, the communication system in this application embodiment can also be applied to licensed spectrum. This licensed spectrum can also be considered a dedicated spectrum.

[0031] The embodiments of this application can be applied to terrestrial networks (TN) systems as well as non-terrestrial networks (NTN) systems. As an example, the NTN system may include an NR-based NTN system and an Internet of Things (IoT)-based NTN system.

[0032] A communication system may include one or more terminal devices. The terminal devices mentioned in the embodiments of this application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent, or user device, etc.

[0033] In some embodiments, the terminal device may be a station (ST) in a WLAN. In some embodiments, the terminal device may also be a cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA) device, handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, in-vehicle device, wearable device, terminal device in a next-generation communication system (such as an NR system), or terminal device in a future public land mobile network (PLMN) network, etc.

[0034] In some embodiments, the terminal device may be a device that provides voice and / or data connectivity to the user. For example, the terminal device may be a handheld device, an in-vehicle device, etc., with wireless connectivity. As some specific examples, the terminal device may be a mobile phone, tablet, laptop, PDA, 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.

[0035] In some embodiments, the terminal device may be deployed on land. For example, the terminal device may be deployed indoors or outdoors. In some embodiments, the terminal device may be deployed on water, such as on a ship. In some embodiments, the terminal device may be deployed in the air, such as on an airplane, balloon, or satellite.

[0036] In addition to terminal devices, the communication system may also include one or more network devices. In this embodiment, the network device may be a device for communicating with the terminal device; this network device may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. In this embodiment, the network device may refer to an access network (RAN) node (or device) that connects the terminal device to the wireless network. Access network equipment can broadly encompass various names listed below, or be interchangeable with them, such as: NodeB, evolved NodeB (eNB), next-generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master MeNB, auxiliary SeNB, multi-mode radio (MSR) node, home base station, network controller, access node, radio 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. Base stations can be macro base stations, micro base stations, relay nodes, donor nodes, 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, or a device that performs base station functions in device-to-device (D2D), vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, a network-side device in a 6G network, or a device performing 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.

[0037] 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.

[0038] 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.

[0039] By way of example and not limitation, in the embodiments of this application, the network device may have mobility characteristics; for example, the network device may be a mobile device. In some embodiments of this application, the network device may be a satellite or a balloon station. For example, the satellite may be a low Earth orbit (LEO) satellite, a medium Earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a highly elliptical orbit (HEO) satellite, etc. In some embodiments of this application, the network device may also be a base station located on land, water, or other similar locations.

[0040] 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.

[0041] For example, Figure 1 This is a schematic diagram of the architecture of a communication system provided in an embodiment of this application. Figure 1 As shown, the communication system 100 may include a network device 110, which may be a device that communicates with a terminal device 120 (or a communication terminal, terminal). The network device 110 can provide communication coverage for a specific geographical area and can communicate with terminal devices located within that coverage area.

[0042] Figure 1 An exemplary diagram shows a network device and two terminal devices. In some embodiments of this application, the 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 does not limit the scope of the embodiments.

[0043] In some embodiments of this application, Figure 1The wireless communication system shown may also include other network entities such as a mobility management entity (MME) and an access and mobility management function (AMF), but this application does not limit this.

[0044] It should be understood that devices with communication functions in the network / system of this application embodiment can be referred to as communication devices. Figure 1 Taking the communication system 100 shown as an example, the communication equipment may include a network device 110 and a terminal device 120 with communication functions. The network device 110 and the terminal device 120 may be the specific devices described above, and will not be repeated here. The communication equipment may also include other devices in the communication system 100, such as network controllers, mobility management entities, and other network entities. This application embodiment does not limit this.

[0045] Terminal devices can support various uplink waveforms, each with different characteristics and performance. For example, NR supports two waveforms: Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) and Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM). DFT-S-OFDM waveforms have single-carrier characteristics and a low peak-to-average power ratio (PAPR). Currently, DFT-S-OFDM waveforms are mainly used in power-constrained edge coverage scenarios and only support single-stream data transmission. Furthermore, if a terminal device uses DFT-S-OFDM waveforms, the network device needs to allocate contiguous frequency domain resources to it. CP-OFDM waveforms support a maximum of four uplink streams. If a terminal device uses CP-OFDM waveforms, the network device can allocate non-contiguous frequency domain resources to it.

[0046] Figure 2 This diagram illustrates the waveform processing steps for CP-OFDM and DFT-S-OFDM. CP-OFDM waveforms can be used for both uplink and downlink. Figure 2As shown, the processing of CP-OFDM waveforms includes sub-carrier mapping, inverse fast fourier transform (IFFT), and CP insertion. Currently, DFT-S-OFDM waveforms are only applicable to the uplink. Figure 2 As shown, unlike the processing of CP-OFDM waveforms, DFT-S-OFDM waveforms require transformation precoding before subcarrier mapping.

[0047] In some communication systems (such as NR systems), the uplink can use either CP-OFDM or DFT-S-OFDM waveforms, specifically configured through the following radio resource control (RRC) parameters: -RACH-ConfigCommon::msg3-transformPrecoder ENUMERATED{enabled}; -PUSCH-Config :: transformPrecoder ENUMERATED{enabled, disabled}; -ConfiguredGrantConfig::transformPrecoder ENUMERATED{enabled,disabled}; -MsgA-PUSCH-Config-r16::msgA-TransformPrecoder-r16 ENUMERATED{enabled, disabled}.

[0048] Coverage is one of the key factors that operators consider when commercializing cellular communication networks, as it directly impacts service quality, capital expenditure, and operating costs. In most real-world deployment scenarios, uplink performance may be the bottleneck, while in some vertical use cases, uplink traffic is high, such as video uploads.

[0049] In Rel-17 research project 900061, "NR Coverage Enhancement," the NR coverage of some bottleneck channels identified in research project "860036," specifically the Physical Uplink Shared Channel (PUSCH), Physical Uplink Control Channel (PUCCH), and Message 3 (Msg3), was extended. However, due to the limited scope of Rel-17 WID, not all coverage enhancement requirements were met.

[0050] Compared to CP-OFDM, DFT-S-OFDM waveforms have lower PAPR, which is advantageous in situations with limited uplink coverage. Currently, uplink waveforms are configured via RRC, a limitation that significantly hinders the switching of cellular edge terminal devices to DFT-S-OFDM waveforms in practice. Therefore, embodiments of this application introduce a mechanism for determining the uplink waveform (or an uplink waveform switching mechanism), enabling terminal devices to dynamically determine the uplink waveform according to actual needs, thereby improving uplink coverage performance.

[0051] Figure 3 This is a flowchart illustrating a wireless communication method provided in an embodiment of this application.

[0052] See Figure 3 In step S310, the terminal device determines the target uplink waveform from a variety of uplink waveforms (or waveforms used for uplink communication).

[0053] In some embodiments, the multiple uplink waveforms may include some or all of the uplink waveforms supported by the terminal device.

[0054] In some embodiments, the multiple uplink waveforms may include uplink waveforms supported by current or future standards. For example, the multiple uplink waveforms may include a first uplink waveform and a second uplink waveform. The first uplink waveform may be, for example, a DFT-S-OFDM waveform, and the second uplink waveform may be, for example, a CP-OFDM waveform.

[0055] In some embodiments, the terminal device determining the target uplink waveform includes: the terminal device dynamically determining the target uplink waveform. "Dynamically determining" is in contrast to "semi-static configuration." "Semi-static configuration" typically has a longer configuration period. Compared to the configuration period of "semi-static configuration," "dynamic determination" can adjust the uplink waveform in a shorter time, and is therefore more flexible. It should be understood that in some embodiments, "the terminal device determines the uplink waveform or determines the target uplink waveform" in various embodiments of this application can be replaced with "the terminal device dynamically determines the uplink waveform or dynamically determines the target uplink waveform."

[0056] In some embodiments, the target uplink waveform may refer to the waveform used for uplink communication. In other words, the target uplink waveform can be used for uplink communication (or transmission of uplink data) between the terminal device and the network device. For example, the target uplink waveform may be a CP-OFDM waveform. Alternatively, the target uplink waveform may be a DFT-S-OFDM waveform.

[0057] In some embodiments, Figure 3 The steps may further include step S320, in which the terminal device sends uplink data to the network device according to the target uplink waveform. Accordingly, the network device can receive the uplink data from the terminal device according to the target uplink waveform.

[0058] In other embodiments, after determining the target uplink waveform, the terminal device does not necessarily have to send uplink data to the network device according to the target uplink waveform. For example, the terminal device may request waveform switching from the network device. If the network device allows waveform switching, the terminal device may send uplink data to the network device according to the target uplink waveform; if the network device does not allow waveform switching, the terminal device may or may not send uplink data to the network device according to the target uplink waveform. See below for details.

[0059] The target uplink waveform can be determined based on certain conditions or according to certain rules. For example, the target uplink waveform can be determined based on one or more of the following: a semi-static uplink waveform configuration; uplink coverage information of the terminal device; measurement results of the downlink signal by the terminal device; data transmission throughput requirements (such as the data transmission throughput requirements of the network device); communication needs; channel quality of the terminal device; and dynamic indication information sent by the network device (such as waveform indication information of the uplink waveform). When determining the target uplink waveform, one of the above information can be considered individually, or multiple information can be considered comprehensively. The following example, in conjunction with Embodiment 1, provides a more detailed illustration of how the target uplink waveform is determined.

[0060] Example 1.1: Determining the target uplink waveform based on the measurement results of the downlink signal by the terminal device In some embodiments, before initiating uplink communication, the terminal device may determine the target uplink waveform based on measurements of the downlink signal. These downlink signal measurements can, for example, be used to measure the quality and / or strength of the downlink signal.

[0061] In some embodiments, the downlink signal may include one or more of the following: physical downlink control channel (PDCCH), physical downlink shared channel (PDSCH), synchronization signal block (SSB), channel state information reference signal (CSI-RS), physical broadcast channel (PBCH), primary synchronization signal (PSS), secondary synchronization signal (SSS), phase tracking reference signal (PT-RS), positioning reference signal (PRS), demodulation reference signal (DMRS), etc.

[0062] In some embodiments, the measurement result of the downlink signal may include one or more of the following: reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), received signal strength indicator (RSSI), etc. Some embodiments described below use RSRP (where RSRP can be replaced by the measurement result of the downlink signal) as an example; these embodiments are also applicable to other measurements such as RSRQ and RSSI.

[0063] Taking RSRP as an example, the lower the RSRP measured by the terminal device, the worse the uplink coverage performance of the terminal device. In this case, the terminal device will determine the DFT-S-OFDM waveform as the target uplink waveform to improve the uplink coverage performance.

[0064] In some embodiments, the target uplink waveform can be determined based on the relationship (or magnitude relationship) between the terminal device's measurement of the downlink signal and a first threshold.

[0065] In some embodiments, if the measurement result of the downlink signal is greater than (or greater than or equal to) a first threshold, the target uplink waveform can be determined as the semi-statically configured uplink waveform. Similarly, if the measurement result of the downlink signal is less than (or less than or equal to) the first threshold, and the semi-statically configured uplink waveform is not the uplink waveform desired by the terminal device, the target uplink waveform can be the desired uplink waveform.

[0066] In some embodiments, if the RSRP measured by the terminal device is greater than (or greater than or equal to) a first threshold (or RSRP threshold), the terminal device does not have special requirements for the uplink waveform. In other words, the terminal device can use the uplink waveform semi-statically configured by the network device without considering waveform switching. If the RSRP measured by the terminal device is less than (or less than or equal to) the first threshold, the terminal device needs to use the DFT-S-OFDM waveform (if the uplink waveform semi-statically configured by the network device is CP-OFDM, then the DFT-S-OFDM waveform needs to be used). Therefore, the terminal device can use the DFT-S-OFDM waveform as the target uplink waveform mentioned above.

[0067] In some embodiments, if the measurement result of the downlink signal is less than or equal to a first threshold, the target uplink waveform is a first uplink waveform among a variety of uplink waveforms (such as a CP-OFDM waveform); and / or, if the measurement result is greater than or equal to the first threshold, the target uplink waveform is a second uplink waveform among a variety of uplink waveforms (such as a DFT-S-OFDM waveform).

[0068] In some embodiments, if the RSRP measured by the terminal device is greater than (or greater than or equal to) a first threshold (or RSRP threshold), the terminal device may determine the target uplink waveform as a CP-OFDM waveform. If the RSRP measured by the terminal device is less than (or less than or equal to) the first threshold, the terminal device may determine the target uplink waveform as a DFT-S-OFDM waveform. In this example, the uplink waveform may not be limited to the uplink waveform that the network device semi-statically configures for the terminal device.

[0069] In some embodiments, the network device semi-statically configures the uplink waveform of the terminal device as a DFT-S-OFDM waveform via RRC signaling. Therefore, regardless of whether the RSRP measured by the terminal device is greater than or less than a first threshold, the DFT-S-OFDM waveform is used. In other words, in this embodiment, although the terminal device needs to measure the RSRP of the downlink signal, it can always use the DFT-S-OFDM waveform without being affected by the RSRP measurement result.

[0070] In some embodiments, if the network device semi-statically configures the uplink waveform of the terminal device as a DFT-S-OFDM waveform through RRC signaling, the terminal device can directly use the semi-statically configured DFT-S-OFDM waveform without considering the RSRP measurement results.

[0071] In some embodiments, the network device semi-statically configures the uplink waveform of the terminal device as a CP-OFDM waveform via RRC signaling. The terminal device can then measure the RSRP of the downlink signal. If the RSRP measured by the terminal device is greater than (or greater than or equal to) a first threshold (or RSRP threshold), the terminal device can determine the target uplink waveform as a CP-OFDM waveform. If the RSRP measured by the terminal device is less than (or less than or equal to) the first threshold, the terminal device can determine the target uplink waveform as a DFT-S-OFDM waveform. In other words, the terminal device can dynamically switch between CP-OFDM and DFT-S-OFDM waveforms based on the relationship between RSRP and the first threshold.

[0072] In some embodiments, the network device semi-statically configures the uplink waveform of the terminal device as a CP-OFDM waveform via RRC signaling. The terminal device can then measure the RSRP of the downlink signal. If the RSRP measured by the terminal device is greater than (or greater than or equal to) a first threshold (or RSRP threshold), the terminal device can determine the target uplink waveform as the semi-statically configured waveform. If the RSRP measured by the terminal device is less than (or less than or equal to) the first threshold, the terminal device can determine the target uplink waveform as a DFT-S-OFDM waveform.

[0073] In some embodiments, the first threshold mentioned above can be determined based on thresholds already defined or supported by certain communication systems (such as NR systems). For example, the first threshold can be directly used as an RSRP threshold already defined or supported by certain communication systems. Alternatively, the first threshold can be obtained by adjusting an RSRP threshold already defined or supported by certain communication systems according to certain rules.

[0074] For example, the first threshold is determined based on one or more of the following: rsrp-ThresholdSSB: The RSRP threshold used for SSB selection in the 4-step random access channel (RACH) procedure. rsrp-ThresholdCSI-RS: The RSRP threshold used for CSI-RS selection during the four-step random access process; msgA-RSRP-ThresholdSSB: The RSRP threshold used for SSB selection in the two-step random access procedure (RACH); rsrp-ThresholdSSB-SUL: The RSRP threshold used to select between normal uplink (NUL) carriers and supplementary uplink (SUL) carriers; msgA-RSRP-Threshold: The RSRP threshold used for selecting between two-step and four-step random access procedures (when a random access resource in a UL BWP is configured with both two-step and four-step random access procedures, this RSRP threshold is used for selecting between the two-step and four-step random access procedures); and rsrp-ThresholdMsg3: The RSRP threshold used for message 3 repetition (Msg3 repetition).

[0075] In some embodiments, the first threshold mentioned above may be a dedicated threshold related to "uplink waveform determination". For example, the first threshold may include one or more of the following thresholds: an RSRP threshold for determining whether to use a first uplink waveform (such as a DFT-S-OFDM waveform) among a plurality of uplink waveforms; and an RSRP threshold for determining whether to determine the uplink waveform to be used from a plurality of uplink waveforms.

[0076] Example 1.2: Determining the target uplink waveform based on uplink coverage information In some embodiments, the target uplink waveform can be determined based on the uplink coverage information (or uplink coverage status, such as uplink coverage performance) of the terminal device. This uplink coverage information may include, for example, the uplink coverage performance of the terminal device. The uplink coverage information of the terminal device can be determined based on the measurement results of the downlink signal by the terminal device. Taking RSRP as an example, if the RSRP measured by the terminal device is lower, it indicates that the uplink coverage performance of the terminal device is worse. In this case, the terminal device determines the DFT-S-OFDM waveform as the target uplink waveform to improve the uplink coverage performance. For information on the type of downlink signal and the usage of the downlink signal measurement results, please refer to Embodiment 1.1, which will not be detailed here.

[0077] In some embodiments, the uplink coverage information of the terminal device can be determined by the terminal device itself. Compared with the method of network devices dynamically configuring uplink waveforms (see the description of Embodiment 1.4 below), having the terminal device determine the uplink waveform to use based on uplink coverage performance is more in line with the needs of actual communication environments.

[0078] In some embodiments, the network device may also determine the uplink coverage information of the terminal device (e.g., based on RSRP to determine the uplink coverage of the terminal device). If the network device determines the uplink coverage information of the terminal device, the network device may dynamically indicate the target uplink beam of the terminal device in a manner similar to Embodiment 1.4 (see below).

[0079] Example 1.3: Determining the target uplink waveform based on data transmission throughput requirements For example, if network devices have high requirements for data transmission throughput (such as being greater than or equal to the second threshold), the terminal device can determine the CP-OFDM waveform as the target uplink waveform.

[0080] For example, if the network device does not have high requirements for data transmission throughput (such as less than or equal to the second threshold), the terminal device can determine the DFT-S-OFDM waveform as the target uplink waveform.

[0081] Example 1.4: Determining the target uplink waveform based on dynamic indication information sent by network devices In some embodiments, the dynamic indication information may be, for example, dynamic control information. This dynamic indication information may indicate the uplink waveform used by the terminal device during uplink communication. Alternatively, the dynamic indication information may indicate that the terminal device switches to an uplink waveform relative to a semi-static configuration during uplink communication. For example, if the semi-static uplink waveform is a DFT-S-OFDM waveform, the network device may send this dynamic indication information. If the terminal device receives this indication information, it can switch the uplink waveform. That is, the terminal device can use a CP-OFDM waveform for uplink communication.

[0082] In some embodiments, the terminal device may use the uplink waveform of the dynamic indication information only in one uplink scheduling. For uplink communication following this scheduling, the terminal device may determine the uplink waveform based on subsequently received dynamic indication information. Alternatively, for uplink communication following this scheduling, the terminal device may use a semi-statically configured uplink waveform.

[0083] In some embodiments, the dynamic indication information is the current dynamic indication information. Before receiving new dynamic indication information from the network device, the uplink transmission process of the terminal device is based on the uplink waveform indicated by the current dynamic indication information.

[0084] In some embodiments, the dynamic indication information may be carried in downlink control information (DCI). This dynamic indication information can be used to indicate the uplink waveform used by the terminal device. Alternatively, the dynamic indication information can be used to indicate whether the terminal device is performing waveform switching.

[0085] In some embodiments, the uplink communication of the terminal device is uplink communication scheduled based on a first DCI. This first DCI is used to carry the dynamic indication information; or, the first DCI is a DCI transmitted before or after the DCI used to carry the dynamic indication information. That is, the network device can indicate the uplink waveform to the terminal device before sending scheduling signaling to the terminal device, or indicate the uplink waveform to the terminal device after sending scheduling signaling but before the terminal device performs uplink communication.

[0086] In some embodiments, the dynamic indication information may be carried in the SSB. This dynamic indication information can be used to indicate the uplink waveform used by the terminal device. Alternatively, the dynamic indication information can be used to indicate whether the terminal device is performing waveform switching.

[0087] Dynamic indication information can be explicitly or implicitly carried in the SSB. In some embodiments, the dynamic indication information is a target DMRS sequence in the SSB. For example, the target DMRS sequence belongs to a target DMRS set among multiple DMRS sequence sets, and these multiple DMRS sets correspond one-to-one with various uplink waveforms. The target uplink waveform is the uplink waveform among the various uplink waveforms that corresponds to the target DMRS set. In some embodiments, after dynamic waveform indication is performed in the SSB, if the terminal device does not receive new waveform indication information, it can always perform uplink communication using the previously indicated waveform.

[0088] See again Figure 3 The steps described in step S310 can be determined based on protocol predefinition, preconfiguration, or network device configuration. In other words, whether the terminal device can determine the uplink waveform from multiple uplink waveforms can be determined based on protocol predefinition, preconfiguration, or network device configuration. The network device configuration mentioned here can include one or more of the following: semi-static network device configuration and dynamic network device configuration.

[0089] In some specific embodiments, network devices can semi-statically configure RRC signaling to allow "the terminal device to determine the uplink waveform to be used from multiple uplink waveforms". For example, new control parameters can be introduced into the RRC signaling to enable / disable "the terminal device to determine the uplink waveform from multiple uplink waveforms". Alternatively, other parameters can be configured in the RRC signaling to implicitly indicate that "the terminal device is allowed to determine the uplink waveform used for uplink communication from multiple uplink waveforms". As an example, an RSRP threshold can be configured in the RRC signaling to indicate that "the terminal device is allowed to determine the uplink waveform used for uplink communication from multiple uplink waveforms". For example, if the RSRP threshold is configured in the RRC signaling, it indicates that "the terminal device is allowed to determine the uplink waveform used for uplink communication from multiple uplink waveforms". Conversely, if the RSRP threshold is not configured in the RRC signaling, it indicates that "the terminal device is not allowed to determine the uplink waveform used for uplink communication from multiple uplink waveforms".

[0090] In some specific embodiments, network devices can be configured via dynamic control commands (or control signaling) to determine whether "the terminal device is allowed to determine the uplink waveform used for uplink communication from multiple uplink waveforms." For example, the dynamic control command can directly indicate whether "the terminal device is allowed to determine the uplink waveform used for uplink communication from multiple uplink waveforms." As an example, the dynamic control command can instruct the terminal device to enable / disable the function of "the terminal device determining the uplink waveform used for uplink communication from multiple uplink waveforms" through different bit values. For scheduled uplink communication, the indication of whether "the terminal device is allowed to determine the uplink waveform used for uplink communication from multiple uplink waveforms" can be placed in the uplink scheduling signaling. Alternatively, the indication of whether "the terminal device is allowed to determine the uplink waveform used for uplink communication from multiple uplink waveforms" can be placed before the uplink scheduling signaling.

[0091] For example, when a terminal device receives a control command from a network device, if the control command allows the terminal device to determine the uplink waveform used for uplink communication from multiple uplink waveforms, the target uplink waveform used for uplink communication can be determined based on the relationship between the RSRP measured on the downlink signal and the RSRP threshold value.

[0092] As one possible implementation, when a terminal device receives control signaling from a network device and determines that the network device supports "the terminal device determining the uplink waveform used for uplink communication from multiple uplink waveforms," ​​the terminal device can determine the target uplink waveform based on downlink signal measurement results. For example, when the measured RSRP is less than a first threshold, the terminal device can determine the DFT-S-OFDM waveform as the target uplink waveform. Similarly, when the measured RSRP is greater than the RSRP threshold, the terminal device can determine the CP-OFDM waveform as the target uplink waveform.

[0093] As another possible implementation, when the terminal device receives a control command from the network device and determines that the network device supports "the terminal device determining the uplink waveform used for uplink communication from multiple uplink waveforms," ​​the terminal device can determine the uplink waveform (i.e., the uplink waveform configured semi-statically by the network device) based on the network device's semi-static configuration. If the uplink waveform is a DFT-S-OFDM waveform, the terminal device determines this DFT-S-OFDM waveform as the target uplink waveform. If the first uplink waveform is a CP-OFDM waveform, the terminal device can determine the target uplink waveform based on the measurement results of the downlink signal. For example, when the measured RSRP is less than a first threshold, the terminal device can determine the DFT-S-OFDM waveform as the target uplink waveform. Similarly, when the measured RSRP is greater than the RSRP threshold, the terminal device can determine the CP-OFDM waveform as the target uplink waveform.

[0094] In some embodiments, the technical solutions provided in this application can be applied to random access procedures (e.g., four-step random access procedures or two-step random access procedures), scheduling-free uplink transmission (e.g., configured grant physical uplink shared channel (CG-PUSCH)), and scheduling-based uplink transmission (e.g., dynamic grant physical uplink shared channel (DG-PUSCH)). For example, in a two-step random access procedure, the terminal device first sends message A (MsgA). At this time, there may be no instruction from the network device; however, the terminal device can evaluate its uplink coverage performance before communication. In this case, the terminal device can dynamically determine the uplink waveform, which may improve the uplink data transmission performance.

[0095] Figure 4 A specific example of an embodiment of this application is given. See also... Figure 4 In step S410, the network device sends an RSRP threshold (corresponding to the first threshold mentioned above) to the terminal device. This RSRP threshold can be used by the terminal device to determine the uplink waveform used for uplink communication from multiple uplink waveforms. Alternatively, the network device can also send a control command to the terminal device in step S420 to instruct the terminal device to enable the function of "determining the uplink waveform used for uplink communication from multiple uplink waveforms". In step S430, the terminal device receives the uplink waveform semi-statically configured by the network device. For ease of description, Figure 4In this example, the waveform is referred to as uplink waveform 1. Next, in step S440, the terminal device can measure the RSRP of the downlink signal and compare the measured RSRP with the RSRP threshold. Finally, in step S450, the terminal device can determine, based on the comparison result of RSRP and RSRP threshold, whether to use uplink waveform 1 for uplink communication or to use uplink waveform 2, which is different from uplink waveform 1, for uplink communication.

[0096] In some embodiments, after the terminal device determines the uplink waveform used for uplink communication from multiple uplink waveforms, the network device can perform data reception processing through blind detection. That is, the network device can perform data reception processing according to multiple uplink waveforms. This implementation increases the complexity of the network device's reception processing. To reduce the complexity of the network device's reception processing, a further solution can be introduced. After the terminal device determines the uplink waveform used for uplink communication from multiple uplink waveforms, a certain method can be used to enable the network device to determine the uplink waveform used by the terminal, and then perform data reception processing according to the corresponding waveform. Two possible solutions are given below with reference to Embodiment 2.

[0097] Example 2.1: Multiple uplink waveforms correspond to multiple uplink resources Since different uplink waveforms correspond to different uplink resources, uplink communication with different waveforms can be performed based on various uplink resources.

[0098] In some embodiments, the uplink resources corresponding to the uplink waveform can refer to one or more of time-domain resources, frequency-domain resources, spatial-domain resources, and code-domain resources. For example, the uplink resources corresponding to the uplink waveform can refer to time-frequency resources.

[0099] In some embodiments, the various uplink resources can be configured (or pre-configured) by the network device. Alternatively, the various uplink resources can be scheduled by the network device.

[0100] For example, for a scheduling-free uplink communication process, network devices can semi-statically configure uplink resources corresponding to various waveforms.

[0101] For example, in a scheduling-based uplink communication process, network devices can indicate uplink resources corresponding to various waveforms.

[0102] After the terminal device determines the target uplink waveform, it can perform uplink data transmission based on the uplink resources corresponding to the target uplink waveform; accordingly, the network device can use different uplink waveforms on various uplink resources to perform corresponding signal reception processing.

[0103] In some embodiments, the uplink resources corresponding to multiple uplink waveforms may be associated. Therefore, the resource locations of these multiple uplink resources can be determined based on the association between their resource locations. In other words, the uplink resources of one uplink waveform can be obtained based on the uplink resources of another uplink waveform.

[0104] For example, there may be offset values ​​between uplink resources of various uplink waveforms. These offset values ​​may be protocol-defined, semi-statically configured by the network device, or dynamically configured by the network device. These offset values ​​may be, for example, time-domain offset values ​​and / or frequency-domain offset values.

[0105] As an example, when a network device semi-statically configures an uplink waveform for a terminal device, time-frequency resource 1 (which may include semi-statically configured time-frequency resources for scheduling-free communication and dynamically indicated time-frequency resources for scheduled communication) can be used with that uplink waveform. When the uplink waveform determined by the terminal device is the same as the semi-statically configured uplink waveform by the network device, the terminal device can perform communication based on the aforementioned time-frequency resource; when the uplink waveform determined by the terminal device is different from the semi-statically configured uplink waveform by the network device, the terminal device can first determine time-frequency resource 2 based on the offset value, and then perform uplink communication based on time-frequency resource 2. When performing data reception processing, the network device will use the corresponding waveforms for signal reception processing on the two time-frequency resources.

[0106] Example 2.2: The terminal device sends indication information in advance to indicate the target uplink waveform. In some embodiments, such as Figure 5 As shown, before using the target uplink waveform to communicate with the network device, the terminal device can send a first indication message (also called waveform indication message or waveform advance indication) to the network device. This first indication message can be used to indicate the target uplink waveform. In this way, the network device can know the target uplink waveform in advance, thereby avoiding the need for the network device to use blind detection to solve for multiple waveforms or to perform pre-defined waveform judgment processing.

[0107] In some embodiments, the aforementioned first indication information can be sent via uplink control information (UCI). That is, a new UCI can be introduced to instruct the terminal device to determine the target uplink waveform from multiple uplink waveforms.

[0108] The aforementioned first indication information may be sent if the target uplink waveform is consistent with and / or inconsistent with the semi-static configuration uplink waveform.

[0109] For example, when the target uplink waveform is inconsistent with the semi-statically configured uplink waveform of the network device, the terminal device can send a first indication message before initiating uplink communication to notify the network device to use the non-semi-statically configured waveform for data reception processing. When the target uplink waveform is consistent with the semi-statically configured uplink waveform of the network device, the terminal device may not send the first indication message.

[0110] For example, when the target uplink waveform is inconsistent with the semi-statically configured uplink waveform of the network device, the terminal device can send a first indication message before initiating uplink communication to notify the network device to use the non-semi-statically configured waveform for data reception processing. Conversely, when the target uplink waveform is consistent with the semi-statically configured uplink waveform of the network device, the terminal device can also send a first indication message before initiating uplink communication.

[0111] In some embodiments, the time-domain resource used to carry the first indication information is a first time-domain resource, which can be configured based on the network device. The network device configuration mentioned here can refer to semi-static configuration or dynamic configuration. If a dynamic configuration is used, the network device can configure the first indication information and the information for scheduling uplink communication in the same signaling. Alternatively, the network device can configure the first indication information before the scheduling signaling.

[0112] In some embodiments, the first time-domain resource can be determined based on the time-domain location of the second time-domain resource. The second time-domain resource is a time-domain resource used for uplink communication. For example, the first time-domain resource can be determined based on the positional relationship between the first and second time-domain resources. The positional relationship between the first and second time-domain resources mentioned herein can be determined based on protocol predefined criteria or network device configuration.

[0113] In some embodiments, if the implementation described in Embodiment 2.2 is adopted, for scheduling-based communication, it is necessary to ensure that there are time-domain resources for carrying the first indication information between the scheduling signaling of the network device and the time-domain resources of the uplink communication scheduled by the scheduling information.

[0114] In some embodiments, if the implementation described in Example 2.2 is adopted, it is not necessary to ensure that there are time-domain resources for carrying the first indication information between the scheduling signaling of the network device and the time-domain resources of the uplink communication scheduled by the scheduling information. In this case, the terminal device can communicate based on the uplink waveform of the network device in a semi-static configuration.

[0115] See Figure 6After step S310, the terminal device can continue to execute step S610, that is, the terminal device sends a first request to the network device. This first request can be used to request an uplink waveform switch; therefore, in some embodiments, this first request can also be called a waveform switching request. By sending the first request, the network device can obtain the uplink waveform, thereby avoiding the need for the network device to use blind detection to solve for multiple waveforms or to perform pre-defined waveform judgment processing.

[0116] In some embodiments, if a time-domain resource exists prior to uplink communication to carry the first request, the first request is sent on that time-domain resource.

[0117] In some embodiments, if no time-domain resource exists prior to the time-domain resource of the uplink communication to carry the first request, the first request is sent after the uplink communication. For example, the first request can be used to request waveform switching when the next communication is initiated.

[0118] In some embodiments, if there is no time-domain resource prior to the time-domain resource for carrying the first request in the uplink communication, the uplink communication is performed based on a semi-statically configured uplink waveform.

[0119] by Figure 7 For example, in scenario A, network scheduler 1 is used to schedule uplink communication. The uplink waveform of this network device is semi-statically configured as uplink waveform 1. Before uplink communication, due to the existence of uplink resources ( Figure 7 In this context, U represents an uplink subframe, and D represents a downlink subframe. In scenario 1, there are multiple uplink subframes between network scheduling 1 and uplink communication. Therefore, the terminal device can send a first request through this uplink resource to request switching the uplink waveform to uplink waveform 2. After receiving feedback from the network device (such as waveform indication information, indicating that the network device allows the terminal device to switch the uplink waveform to uplink waveform 2), the terminal device uses uplink waveform 2 for uplink communication. In scenario B, network scheduling 1 is used to schedule uplink communication 1. The uplink waveform of this network device is semi-statically configured as uplink waveform 1. Before uplink communication, since there are no uplink resources ( Figure 7 In scenario 2, there is no uplink subframe between network scheduling 1 and uplink communication. Therefore, the terminal device can send the first request after uplink communication 1 to request the uplink waveform to be switched to uplink waveform 2. Figure 7 As can be seen from Scenario B, the uplink waveform used in the subsequent scheduling process is uplink waveform 2.

[0120] See again Figure 6 In some embodiments, Figure 6The method may further include step S620, in which the terminal device receives a feedback message from the network device in response to the first request. This feedback message can be used to indicate whether the network device allows the switching of the uplink waveform. For example, the feedback message may carry waveform indication information, which may indicate the type of uplink waveform and whether the network device allows the switching of the uplink waveform. For example, the waveform indication information may be an acknowledgement (ACK) or a negative acknowledgement (NACK). If the waveform indication information is an ACK, it indicates that the network device allows the switching of the uplink waveform. If the waveform indication information is a NACK, it indicates that the network device does not allow the switching of the uplink waveform.

[0121] In some embodiments, the time-domain resource used to carry the first request may be configured by the network device. For example, the time-frequency resource may be semi-statically and / or dynamically configured by the network device.

[0122] In some embodiments, the time-domain resources used to carry the first request may have an offset value (such as a time-domain offset value) between them and the time-frequency resources of the uplink communication. The time-domain resources used to carry the first request may be determined based on this offset value. This offset value may be agreed upon by a protocol or configured by a network device.

[0123] The above text combined Figures 1 to 7 The method embodiments of this application are described in detail below, in conjunction with... Figures 8 to 10 The present application provides a detailed description of the apparatus embodiments. It should be understood that the descriptions of the method embodiments correspond to the descriptions of the apparatus embodiments; therefore, any parts not described in detail can be found in the foregoing method embodiments.

[0124] Figure 8 This is a schematic diagram of the structure of the terminal device provided in the embodiments of this application. Figure 8 The terminal device 800 includes a determination module 810. The determination module 810 can be used to determine a target uplink waveform from a variety of uplink waveforms, wherein the target uplink waveform is used for uplink communication between the terminal device and the network device.

[0125] In some embodiments, the target uplink waveform is determined based on one or more of the following: a semi-statically configured uplink waveform; uplink coverage information of the terminal device; measurement results of the downlink signal by the terminal device; data transmission throughput requirements of the network device; and dynamic indication information sent by the network device.

[0126] In some embodiments, the target uplink waveform is determined based on the relationship between the measurement result and a first threshold.

[0127] In some embodiments, if the measurement result is greater than or equal to the first threshold, the target uplink waveform is a semi-statically configured uplink waveform; and / or if the measurement result is less than or equal to the first threshold, and the semi-statically configured uplink waveform is not the uplink waveform expected by the terminal device, the target uplink waveform is the expected uplink waveform.

[0128] In some embodiments, if the measurement result is less than or equal to the first threshold, the target uplink waveform is the first uplink waveform among the plurality of uplink waveforms; and / or if the measurement result is greater than or equal to the first threshold, the target uplink waveform is the second uplink waveform among the plurality of uplink waveforms.

[0129] In some embodiments, the first threshold is determined based on one or more of the following: an RSRP threshold for SSB selection in a four-step random access process; an RSRP threshold for CSI-RS selection in a four-step random access process; an RSRP threshold for SSB selection in a two-step random access process; an RSRP threshold for selection between NUL and SUL carriers; an RSRP threshold for selection in both two-step and four-step random access processes; an RSRP threshold for message 3 repetition; an RSRP threshold for determining whether to use a first uplink waveform among the multiple uplink waveforms; and an RSRP threshold for determining whether to determine the uplink waveform to use from the multiple uplink waveforms.

[0130] In some embodiments, the dynamic indication information is carried in the DCI.

[0131] In some embodiments, the uplink communication is scheduled based on a first DCI, which is used to carry the dynamic indication information; or, the first DCI is a DCI transmitted before or after the DCI used to carry the dynamic indication information.

[0132] In some embodiments, the uplink waveform indicated by the dynamic indication information is used only in the uplink communication scheduled by the first DCI.

[0133] In some embodiments, the dynamic indication information is carried in the SSB.

[0134] In some embodiments, the dynamic indication information is the target DMRS sequence in the SSB.

[0135] In some embodiments, the target DMRS sequence belongs to a target DMRS set in a plurality of DMRS sequence sets, and the plurality of DMRS sets correspond one-to-one with the plurality of uplink waveforms, wherein the target uplink waveform is the uplink waveform in the plurality of uplink waveforms that corresponds to the target DMRS set.

[0136] In some embodiments, the dynamic indication information is the current dynamic indication information. Before receiving new dynamic indication information, the uplink transmission process of the terminal device is based on the uplink waveform indicated by the current dynamic indication information.

[0137] In some embodiments, whether the terminal device determines the uplink waveform to use from a plurality of uplink waveforms is configured by one or more of the following methods: semi-static configuration of the network device and dynamic configuration of the network device.

[0138] In some embodiments, the various uplink waveforms correspond to various uplink resources.

[0139] In some embodiments, the various uplink resources are configured or scheduled by the network device.

[0140] In some embodiments, the resource locations of the multiple uplink resources are determined based on the association between the resource locations of the multiple uplink resources.

[0141] In some embodiments, the terminal device 800 further includes: a first sending module, configured to send first indication information to the network device before communicating with the network device using the target uplink waveform, the first indication information being used to indicate the target uplink waveform.

[0142] In some embodiments, the first indication information is sent when the target uplink waveform is consistent with and / or inconsistent with the semi-static configuration uplink waveform.

[0143] In some embodiments, the time-domain resource used to carry the first indication information is a first time-domain resource, which is determined based on one or more of the following: the network device configuration; and the time-domain location of a second time-domain resource, wherein the second time-domain resource is a time-domain resource used for the uplink communication.

[0144] In some embodiments, the positional relationship between the first time-domain resource and the second time-domain resource is determined based on protocol predefined or based on the network device configuration.

[0145] In some embodiments, the terminal device 800 may further include: a second sending module, configured to send a first request to the network device after the terminal device determines the target uplink waveform from multiple uplink waveforms, the first request being used to request a switching of the uplink waveform.

[0146] In some embodiments, the terminal device 800 may further include: a first receiving module, configured to receive a feedback message sent by the network device in response to the first request, the feedback message being used to indicate whether the network device allows the switching of the uplink waveform.

[0147] In some embodiments, if a time-domain resource for carrying the first request exists prior to the time-domain resource of the uplink communication, the first request is sent before the uplink communication; and / or if a time-domain resource for carrying the first request does not exist prior to the time-domain resource of the uplink communication, the first request is sent after the uplink communication.

[0148] In some embodiments, if there is no time-domain resource prior to the time-domain resource for carrying the first request in the uplink communication, the uplink communication is performed based on a semi-statically configured uplink waveform.

[0149] In some embodiments, the multiple uplink waveforms include a first uplink waveform and a second uplink waveform, wherein the first uplink waveform is a DFT-S-OFDM waveform and the second uplink waveform is a CP-OFDM waveform.

[0150] In some embodiments, the target uplink waveform is dynamically determined by the terminal device from the plurality of uplink waveforms.

[0151] In some embodiments, the terminal device further includes: a second receiving module, configured to receive configuration information from the network device before the terminal device determines a target uplink waveform from a plurality of uplink waveforms, the configuration information being used to indicate whether the terminal device determines the uplink waveform to be used from the plurality of uplink waveforms.

[0152] Figure 9 This is a schematic diagram of the network device provided in the embodiments of this application. Figure 9 The network device 900 includes a first receiving module 910. The first receiving module 910 can be used to receive uplink data from a terminal device according to a target uplink waveform, wherein the target uplink waveform is a waveform determined by the terminal device from a variety of uplink waveforms for uplink communication with the network device.

[0153] In some embodiments, the target uplink waveform is determined based on one or more of the following: a semi-statically configured uplink waveform; uplink coverage information of the terminal device; measurement results of the downlink signal by the terminal device; data transmission throughput requirements of the network device; and dynamic indication information sent by the network device.

[0154] In some embodiments, the target uplink waveform is determined based on the relationship between the measurement result and a first threshold.

[0155] In some embodiments, if the measurement result is greater than or equal to the first threshold, the target uplink waveform is a semi-statically configured uplink waveform; and / or if the measurement result is less than or equal to the first threshold, and the semi-statically configured uplink waveform is not the uplink waveform expected by the terminal device, the target uplink waveform is the expected uplink waveform.

[0156] In some embodiments, if the measurement result is less than or equal to the first threshold, the target uplink waveform is the first uplink waveform among the plurality of uplink waveforms; and / or if the measurement result is greater than or equal to the first threshold, the target uplink waveform is the second uplink waveform among the plurality of uplink waveforms.

[0157] In some embodiments, the first threshold is determined based on one or more of the following: an RSRP threshold for SSB selection in a four-step random access process; an RSRP threshold for Channel State Information Reference Signal (CSI-RS) selection in a four-step random access process; an RSRP threshold for SSB selection in a one-step random access process; an RSRP threshold for selection between NUL and SUL carriers; an RSRP threshold for selection in both two-step and four-step random access processes; an RSRP threshold for message 3 repetition; an RSRP threshold for determining whether to use a first uplink waveform among the multiple uplink waveforms; and an RSRP threshold for determining whether to determine the uplink waveform to use from the multiple uplink waveforms.

[0158] In some embodiments, the dynamic indication information is carried in the DCI.

[0159] In some embodiments, the uplink communication is scheduled based on a first DCI, which is used to carry the dynamic indication information; or, the first DCI is a DCI transmitted before or after the DCI used to carry the dynamic indication information.

[0160] In some embodiments, the uplink waveform indicated by the dynamic indication information is used only in the uplink communication scheduled by the first DCI.

[0161] In some embodiments, the dynamic indication information is carried in the SSB.

[0162] In some embodiments, the dynamic indication information is the target DMRS sequence in the SSB.

[0163] In some embodiments, the target DMRS sequence belongs to a target DMRS set in a plurality of DMRS sequence sets, and the plurality of DMRS sets correspond one-to-one with the plurality of uplink waveforms, wherein the target uplink waveform is the uplink waveform in the plurality of uplink waveforms that corresponds to the target DMRS set.

[0164] In some embodiments, the dynamic indication information is the current dynamic indication information. Before receiving new dynamic indication information, the uplink transmission process of the terminal device is based on the uplink waveform indicated by the current dynamic indication information.

[0165] In some embodiments, whether the terminal device determines the uplink waveform to use from a variety of uplink waveforms is configured by one or more of the following methods: semi-static configuration of the network device and dynamic configuration of the network device.

[0166] In some embodiments, the various uplink waveforms correspond to various uplink resources.

[0167] In some embodiments, the various uplink resources are configured or scheduled by the network device.

[0168] In some embodiments, the resource locations of the multiple uplink resources are determined based on the association between the resource locations of the multiple uplink resources.

[0169] In some embodiments, the network device 900 may further include: a second receiving module, configured to receive first indication information from the terminal device before communicating with the network device using the target uplink waveform, the first indication information being used to indicate the target uplink waveform.

[0170] In some embodiments, the first indication information is sent when the target uplink waveform is consistent with and / or inconsistent with the semi-static configuration uplink waveform.

[0171] In some embodiments, the time-domain resource used to carry the first indication information is a first time-domain resource, which is determined based on one or more of the following: the network device configuration; and the time-domain location of a second time-domain resource, wherein the second time-domain resource is a time-domain resource used for the uplink communication.

[0172] In some embodiments, the positional relationship between the first time-domain resource and the second time-domain resource is determined based on protocol predefined or based on the network device configuration.

[0173] In some embodiments, the network device 900 may further include: a third receiving module, configured to receive a first request from the terminal device after the network device receives the target uplink waveform, the first request being used to request a switching of the uplink waveform.

[0174] In some embodiments, the network device 900 may further include: a first sending module, configured to send a feedback message to the terminal device in response to the first request, the feedback message being used to indicate whether the network device allows the switching of the uplink waveform.

[0175] In some embodiments, if a time-domain resource for carrying the first request exists prior to the time-domain resource of the uplink communication, the first request is sent before the uplink communication; and / or if a time-domain resource for carrying the first request does not exist prior to the time-domain resource of the uplink communication, the first request is sent after the uplink communication.

[0176] In some embodiments, if there is no time-domain resource prior to the time-domain resource for carrying the first request in the uplink communication, the uplink communication is performed based on a semi-statically configured uplink waveform.

[0177] In some embodiments, the multiple uplink waveforms include a first uplink waveform and a second uplink waveform, wherein the first uplink waveform is a DFT-S-OFDM waveform and the second uplink waveform is a CP-OFDM waveform.

[0178] In some embodiments, the target uplink waveform is dynamically determined by the terminal device from the plurality of uplink waveforms.

[0179] In some embodiments, the network device further includes: a second transmitting module, configured to transmit configuration information to the terminal device before the network device receives uplink data from the terminal device according to a target uplink waveform, the configuration information being used to indicate whether the terminal device determines the uplink waveform to be used from the plurality of uplink waveforms.

[0180] Figure 10 This is a schematic structural diagram of the device according to an embodiment of this application. Figure 10 The dashed lines indicate that the unit or module is optional. The device 1000 can be used to implement the methods described in the above method embodiments. The device 1000 can be a chip or a communication device. The communication device can be, for example, the terminal device or network device mentioned above.

[0181] Apparatus 1000 may include one or more processors 1010. The processor 1010 may support apparatus 1000 in implementing the methods described in the preceding method embodiments. The processor 1010 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 1010 may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0182] The apparatus 1000 may further include one or more memories 1020. The memories 1020 store a program that can be executed by the processor 1010, causing the processor 1010 to perform the methods described in the preceding method embodiments. The memories 1020 may be independent of the processor 1010 or integrated within the processor 1010.

[0183] The device 1000 may also include a transceiver 1030. The processor 1010 can communicate with other devices or chips via the transceiver 1030. For example, the processor 1010 can send and receive data with other devices or chips via the transceiver 1030.

[0184] This application also provides a computer-readable storage medium for storing a program. This computer-readable storage medium can be applied to the communication device provided in this application, and the program causes a computer to execute the methods performed by the communication device in various embodiments of this application.

[0185] This application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to the communication device provided in this application embodiment, and the program causes a computer to execute the methods performed by the communication device in various embodiments of this application.

[0186] 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 communication device in various embodiments of this application.

[0187] It should be understood that the term "instruction" mentioned in the embodiments of this application 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.

[0188] In the description of the embodiments of this application, the term "correspondence" may indicate that there is a direct or indirect correspondence between two things, or that there is an association between two things, or that there is a relationship of instruction and being instructed, configuration and being configured, etc.

[0189] The “configuration” in this application embodiment may include configuration via at least one of system messages, radio resource control (RRC) signaling, and media access control control element (MAC CE).

[0190] In some embodiments of this application, "predefined" or "preset" 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.

[0191] In some 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 the term.

[0192] It should be understood that the term "and / or" in this article 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 article generally indicates that the preceding and following related objects have an "or" relationship.

[0193] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0194] 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.

[0195] 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.

[0196] 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.

[0197] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as 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 via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can read or a data storage device such as a server or data center that integrates one or more available media. The available media may 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)).

[0198] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for wireless communication, characterized in that, include: The terminal device determines a target uplink waveform from a variety of uplink waveforms, wherein the target uplink waveform is used for uplink communication between the terminal device and the network device.

2. The method according to claim 1, characterized in that, The target uplink waveform is determined based on one or more of the following: The uplink waveform in a semi-static configuration; The uplink coverage information of the terminal device; The measurement results of the downlink signal by the terminal device; The network device's data transmission throughput requirements; and The network device sends dynamic indication information.

3. The method according to claim 2, characterized in that, The dynamic indication information is carried in the downlink control information (DCI), and / or, The uplink communication is scheduled based on a first DCI, which is used to carry the dynamic indication information; or, the first DCI is a DCI transmitted before or after the DCI used to carry the dynamic indication information.

4. The method according to claim 3, characterized in that, The uplink waveform indicated by the dynamic indication information is used only in the uplink communication scheduled by the first DCI.

5. The method according to any one of claims 1-4, characterized in that, The multiple uplink waveforms include a first uplink waveform and a second uplink waveform. The first uplink waveform is a Fourier transform extended orthogonal frequency division multiplexing (DFT-S-OFDM) waveform, and the second uplink waveform is a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform.

6. The method according to any one of claims 1-5, characterized in that, Before the terminal device determines the target uplink waveform from multiple uplink waveforms, the method further includes: The terminal device receives configuration information from the network device, the configuration information being used to indicate whether the terminal device determines the uplink waveform to be used from the plurality of uplink waveforms.

7. A method for wireless communication, characterized in that, include: The network device receives uplink data from the terminal device according to a target uplink waveform, which is the waveform determined by the terminal device from a variety of uplink waveforms for uplink communication with the network device.

8. The method according to claim 7, characterized in that, The target uplink waveform is determined based on one or more of the following: The uplink waveform in a semi-static configuration; The uplink coverage information of the terminal device; The measurement results of the downlink signal by the terminal device; The network device's data transmission throughput requirements; and The network device sends dynamic indication information.

9. The method according to claim 8, characterized in that, The dynamic indication information is carried in the downlink control information (DCI), and / or The uplink communication is scheduled based on the first DCI, and the DCI used to carry the dynamic indication information is the first DCI. Alternatively, the DCI used to carry the dynamic indication information may be a DCI transmitted before or after the first DCI.

10. The method according to claim 9, characterized in that, The uplink waveform indicated by the dynamic indication information is used only in the uplink communication scheduled by the first DCI.

11. The method according to any one of claims 7-10, characterized in that, The multiple uplink waveforms include a first uplink waveform and a second uplink waveform. The first uplink waveform is a Fourier transform extended orthogonal frequency division multiplexing (DFT-S-OFDM) waveform, and the second uplink waveform is a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform.

12. The method according to any one of claims 7-11, characterized in that, Before the network device receives the uplink data from the terminal device according to the target uplink waveform, the method further includes: The network device sends configuration information to the terminal device, the configuration information being used to indicate whether the terminal device determines the uplink waveform to use from the plurality of uplink waveforms.

13. A terminal device, characterized in that, include: A determination module is used to determine a target uplink waveform from a variety of uplink waveforms, wherein the target uplink waveform is used for uplink communication between the terminal device and the network device.

14. The terminal device according to claim 13, characterized in that, The target uplink waveform is determined based on one or more of the following: The uplink waveform in a semi-static configuration; The uplink coverage information of the terminal device; The measurement results of the downlink signal by the terminal device; The network device's data transmission throughput requirements; and The network device sends dynamic indication information.

15. The terminal device according to claim 14, characterized in that, The dynamic indication information is carried in the downlink control information (DCI), and / or The uplink communication is scheduled based on the first DCI, and the DCI used to carry the dynamic indication information is the first DCI. Alternatively, the DCI used to carry the dynamic indication information may be a DCI transmitted before or after the first DCI.

16. The terminal device according to claim 15, characterized in that, The uplink waveform indicated by the dynamic indication information is used only in the uplink communication scheduled by the first DCI.

17. The terminal device according to any one of claims 13-16, characterized in that, The multiple uplink waveforms include a first uplink waveform and a second uplink waveform. The first uplink waveform is a Fourier transform extended orthogonal frequency division multiplexing (DFT-S-OFDM) waveform, and the second uplink waveform is a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform.

18. The terminal device according to any one of claims 13-17, characterized in that, The terminal device also includes: The second receiving module is configured to receive configuration information from the network device before the terminal device determines the target uplink waveform from multiple uplink waveforms. The configuration information is used to indicate whether the terminal device determines the uplink waveform to be used from the multiple uplink waveforms.

19. A network device, characterized in that, include: The first receiving module is used to receive uplink data from the terminal device according to a target uplink waveform, wherein the target uplink waveform is a waveform determined by the terminal device from a variety of uplink waveforms for uplink communication with the network device.

20. The network device according to claim 19, characterized in that, The target uplink waveform is determined based on one or more of the following: The uplink waveform in a semi-static configuration; The uplink coverage information of the terminal device; The measurement results of the downlink signal by the terminal device; The network device's data transmission throughput requirements; and The network device sends dynamic indication information.

21. The network device according to claim 20, characterized in that, The dynamic indication information is carried in the downlink control information (DCI), and / or The uplink communication is scheduled based on the first DCI, and the DCI used to carry the dynamic indication information is the first DCI. Alternatively, the DCI used to carry the dynamic indication information may be a DCI transmitted before or after the first DCI.

22. The network device according to claim 21, characterized in that, The uplink waveform indicated by the dynamic indication information is used only in the uplink communication scheduled by the first DCI.

23. The network device according to any one of claims 19-22, characterized in that, The multiple uplink waveforms include a first uplink waveform and a second uplink waveform. The first uplink waveform is a Fourier transform extended orthogonal frequency division multiplexing (DFT-S-OFDM) waveform, and the second uplink waveform is a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform.

24. The network device according to any one of claims 19-23, characterized in that, The network device also includes: The second sending module is configured to send configuration information to the terminal device before the network device receives uplink data from the terminal device according to the target uplink waveform. The configuration information is used to indicate whether the terminal device determines the uplink waveform to be used from the plurality of uplink waveforms.

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