Communication method, apparatus and system

Abstract

The application provides a communication method, device and system, which can improve the data transmission rate of a terminal device using a DFT-S-OFDM waveform when a single CC is used in uplink in a CA scenario, and can be applied to the field of 5G systems and future communication systems, such as 6G systems. The method comprises: under the condition of meeting a first condition, sending first indication information to a terminal device, receiving data from the terminal device using a DFT-S-OFDM waveform and a first modulation mode. The first condition comprises: in a carrier aggregation (CA) scenario, the number of component carriers used by the terminal device for uplink data transmission is one. The CA scenario comprises uplink configured as CA and / or downlink configured as CA, the first indication information is used to indicate that the uplink transmission uses the DFT-S-OFDM waveform and the first modulation mode, and the first modulation mode comprises 16 quadrature amplitude modulation (QAM) or 64 QAM.

Description

Technical Field

[0001] This application relates to the field of communications, and more particularly to a communication method, apparatus and system. Background Technology

[0002] Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) waveforms and Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) waveforms are modulation waveforms that can be used for uplink communication. Compared with CP-OFDM waveforms, DFT-S-OFDM waveforms achieve better balance in terms of maximum power reduction (MPR).

[0003] The protocol specifies that in carrier aggregation (CA) scenarios, when a terminal device uses a single component carrier (CC) for uplink data transmission, it can employ either DFT-S-OFDM or CP-OFDM waveforms. Although the MPR of DFT-S-OFDM is lower than that of CP-OFDM, giving it an advantage in MPR, when the terminal device is near or mid-range within the network's coverage area, in CA scenarios using a single uplink CC, the data transmission rate of CP-OFDM is higher than that of DFT-S-OFDM, according to the existing protocol. Therefore, in near-range situations, the terminal device will use CP-OFDM for uplink transmission, but this does not take advantage of the low MPR of DFT-S-OFDM. Summary of the Invention

[0004] This application provides a communication method, apparatus, and system that can improve data transmission rate.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] Firstly, a communication method is provided. The method includes: under the condition of satisfying a first condition, sending first indication information to a terminal device, and receiving data from the terminal device using a DFT-S-OFDM waveform and a first modulation scheme. The first condition includes: in a carrier aggregation (CA) scenario, the number of component carriers used by the terminal device for uplink data transmission is one. The CA scenario includes uplink configured as CA and / or downlink configured as CA. The first indication information is used to indicate uplink transmission using a Discrete Fourier Transform Spread Spectrum (DFT-S-OFDM) waveform and a first modulation scheme, wherein the first modulation scheme includes quadrature amplitude modulation (QAM) or 64QAM.

[0007] Based on the communication method provided in the first aspect, in a CA scenario, when the number of component carriers used by the terminal device for uplink data transmission is one, the network device sends a first indication message to the terminal device, instructing the terminal device to use a DFT-S-OFDM waveform and a first modulation scheme for uplink transmission. The first modulation scheme includes 16QAM or 64QAM. Compared with binary phase shift keying (BPSK) and quadrature phase shift keying (QPSK), 16QAM and 64QAM have higher modulation orders and can achieve higher data transmission rates. Thus, in a CA scenario where a single component carrier is used for uplink transmission, the data transmission rate of the terminal device using the DFT-S-OFDM waveform can be improved.

[0008] Furthermore, using the DFT-S-OFDM waveform results in less backoff transmission power compared to using the CP-OFDM waveform, while allowing for greater transmission power after backoff, thus achieving greater coverage gain and a better user experience. Therefore, when the terminal device is near the network device's coverage area, in a CA scenario using uplink single CC, the terminal device can fully utilize the low MPR advantage of the DFT-S-OFDM waveform for uplink transmission, while also improving the data transmission rate.

[0009] In one possible design, the number of component carriers used for uplink data transmission by the terminal device is one, which may include: the terminal device being configured to use a single uplink component carrier, and the resource block (RB) for transmitting data in the component carrier used for uplink data transmission by the terminal device being contiguous; or, the terminal device being configured to use continuous uplink CA, and only one component carrier among the multiple component carriers of the CA being used for uplink data transmission by the terminal device, and the RB for transmitting data in the component carrier used for uplink data transmission by the terminal device being contiguous.

[0010] In other words, the number of component carriers used by the terminal device for uplink data transmission is one, which includes: the terminal device is configured to use a single uplink component carrier and uses this single component carrier for uplink data transmission, and the RBs in the component carrier used by the terminal device are consecutive. Alternatively, the number of component carriers used by the terminal device for uplink data transmission is one, which includes: the terminal device is configured for uplink CA, but the terminal device uses only one component carrier for uplink data transmission, and the RBs in the component carrier used by the terminal device are consecutive.

[0011] In one possible design approach, the first condition also includes: the uplink channel bandwidth is less than or equal to 400 MHz.

[0012] For example, the first condition may include: in the CA scenario, the terminal device is configured to transmit data via a single uplink component carrier, and the RBs transmitting data in the component carrier used by the terminal device for uplink data transmission are continuous, and the uplink channel bandwidth is less than or equal to 400 MHz.

[0013] For example, the first condition may include: in the CA scenario, the terminal device is configured as uplink continuous CA, and only one component carrier among the multiple component carriers of CA is used for uplink data transmission by the terminal device, and the RBs transmitting data in the component carrier used for uplink data transmission by the terminal device are continuous, and the uplink channel bandwidth is less than or equal to 400 MHz.

[0014] In one possible design approach, there is a first correspondence between the DFT-S-OFDM waveform, the first modulation scheme, and the first power back-off range, wherein the first power back-off range includes the maximum power back-off value.

[0015] In other words, the first correspondence includes the correspondence between the DFT-S-OFDM waveform, the first modulation scheme, and the first power back-off range. Thus, after receiving the first indication information, the terminal device can select the first power back-off range (corresponding to the waveform and modulation scheme used) from the first correspondence to perform power back-off, ensuring that the transmitted power is within the linear region of the power amplifier, thereby guaranteeing system performance.

[0016] In one possible design approach, the first correspondence includes: when the uplink channel bandwidth is less than or equal to 200 MHz and the waveform of the transmitted data is a DFT-S-OFDM waveform, the maximum power backoff value corresponding to 16QAM is 3dB or 3.5dB, and the maximum power backoff value corresponding to 64QAM is 5dB or 5.5dB.

[0017] In one possible design approach, the first correspondence includes: when the uplink channel bandwidth is equal to 400 MHz and the waveform of the transmitted data is a DFT-S-OFDM waveform, the maximum power backoff value corresponding to 16QAM is 4.5 dB, and the maximum power backoff value corresponding to 64QAM is 6.5 dB.

[0018] In one possible design, the first indication information is carried in radio resource control (RRC) signaling.

[0019] In one possible design, the terminal device is a terminal that supports power class 3 (PC3) operation in frequency range 2 (FR2).

[0020] Secondly, a communication method is provided. Applied to a carrier aggregation (CA) scenario, where the number of component carriers used for uplink data transmission by a terminal device is one, the CA scenario includes uplink configured as CA and / or downlink configured as CA. The method includes: receiving first indication information from a network device, and transmitting data to the network device using a DFT-S-OFDM waveform and a first modulation scheme. The first indication information is used to indicate uplink transmission using a Discrete Fourier Transform Spread Spectrum Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) waveform and a first modulation scheme, where the first modulation scheme includes 16-QAM or 64QAM.

[0021] In one possible design, the number of component carriers used for uplink data transmission by the terminal device is one, which may include: the terminal device being configured to use a single uplink component carrier, and the RBs transmitting data in the component carrier used for uplink data transmission by the terminal device being continuous; or, the terminal device being configured to use continuous uplink CA, and only one component carrier among the multiple component carriers of the CA being used for uplink data transmission by the terminal device, and the RBs transmitting data in the component carrier used for uplink data transmission by the terminal device being continuous.

[0022] In one possible design approach, the first condition may also include: the uplink channel bandwidth is less than or equal to 400 MHz.

[0023] In one possible design approach, there is a first correspondence between the DFT-S-OFDM waveform, the first modulation scheme, and the first power back-off range, wherein the first power back-off range includes the maximum power back-off value.

[0024] In one possible design, the above-mentioned method of transmitting data to a network device using a DFT-S-OFDM waveform and a first modulation scheme includes: transmitting data to the network device based on a first transmission power using a DFT-S-OFDM waveform and a first modulation scheme. The first transmission power is obtained after backing up the transmission power according to a first correspondence.

[0025] In one possible design approach, the first correspondence may include: when the uplink channel bandwidth is less than or equal to 200 MHz and the waveform of the transmitted data is a DFT-S-OFDM waveform, the maximum power backoff value corresponding to 16QAM is 3dB or 3.5dB, and the maximum power backoff value corresponding to 64QAM is 5dB or 5.5dB.

[0026] In one possible design approach, the first correspondence may include: when the uplink channel bandwidth is equal to 400 MHz and the waveform of the transmitted data is a DFT-S-OFDM waveform, the maximum power backoff value corresponding to 16QAM is 4.5 dB, and the maximum power backoff value corresponding to 64QAM is 6.5 dB.

[0027] In one possible design, the first indication information is carried in Radio Resource Control (RRC) signaling.

[0028] In one possible design, the terminal device is a power level 3 terminal that supports operation in the frequency range 2FR2.

[0029] The technical effects of the communication method described in the second aspect can be referred to in the technical effects of the communication method described in any possible implementation of the first aspect, and will not be repeated here.

[0030] Thirdly, a communication device is provided. The communication device includes a transmitting module and a receiving module.

[0031] The transmitting module is configured to transmit first indication information to the terminal device under a first condition. The receiving module is configured to receive data from the terminal device using a DFT-S-OFDM waveform and a first modulation scheme. The first condition includes: in a carrier aggregation (CA) scenario, the number of component carriers used by the terminal device for uplink data transmission is one. The CA scenario includes uplink configured as CA and / or downlink configured as CA. The first indication information is used to indicate uplink transmission using a Discrete Fourier Transform Spread Spectrum (DFT-S-OFDM) waveform and a first modulation scheme, whereby the first modulation scheme includes 16-QAM or 64QAM.

[0032] In one possible design, the number of component carriers used for uplink data transmission by the terminal device is one, which may include: the terminal device being configured to use a single uplink component carrier, and the RBs transmitting data in the component carrier used for uplink data transmission by the terminal device being continuous; or, the terminal device being configured to use continuous uplink CA, and only one component carrier among the multiple component carriers of the CA being used for uplink data transmission by the terminal device, and the RBs transmitting data in the component carrier used for uplink data transmission by the terminal device being continuous.

[0033] In one possible design approach, the first condition also includes: the uplink channel bandwidth is less than or equal to 400 MHz.

[0034] In one possible design approach, there is a first correspondence between the DFT-S-OFDM waveform, the first modulation scheme, and the first power back-off range, wherein the first power back-off range includes the maximum power back-off value.

[0035] In one possible design approach, the first correspondence includes: when the uplink channel bandwidth is less than or equal to 200 MHz and the waveform of the transmitted data is a DFT-S-OFDM waveform, the maximum power backoff value corresponding to 16QAM is 3dB or 3.5dB, and the maximum power backoff value corresponding to 64QAM is 5dB or 5.5dB.

[0036] In one possible design approach, the first correspondence includes: when the uplink channel bandwidth is equal to 400 MHz and the waveform of the transmitted data is a DFT-S-OFDM waveform, the maximum power backoff value corresponding to 16QAM is 4.5 dB, and the maximum power backoff value corresponding to 64QAM is 6.5 dB.

[0037] In one possible design, the first indication information is carried in Radio Resource Control (RRC) signaling.

[0038] In one possible design, the terminal device is a power level 3 terminal that supports operation in the frequency range 2FR2.

[0039] It should be noted that the receiving module and the sending module can be set up separately, or they can be integrated into a single module, namely the transceiver module. This application does not impose specific restrictions on the specific implementation methods of the receiving module and the sending module.

[0040] Optionally, the communication device described in the third aspect may further include a processing module and a storage module, the storage module storing programs or instructions. When the processing module executes the program or instructions, the communication device described in the third aspect can perform the method described in the first aspect.

[0041] It should be noted that the communication device described in the third aspect can be a network device, or a chip (system) or other component or assembly that can be set in the network device, and this application does not limit it in this regard.

[0042] The technical effects of the communication device described in the third aspect can be referred to the technical effects of the communication method described in any possible implementation of the first aspect, and will not be repeated here.

[0043] Fourthly, a communication device is provided. Applied to a carrier aggregation (CA) scenario, in which the number of component carriers used for uplink data transmission by the communication device is one, the CA scenario includes uplink configured as CA and / or downlink configured as CA. The communication device includes a transmitting module and a receiving module.

[0044] The receiving module is used to receive first indication information from the network device. The transmitting module is used to transmit data to the network device using a DFT-S-OFDM waveform and a first modulation scheme. The first indication information indicates uplink transmission using a Discrete Fourier Transform Spread Spectrum (DFT-S-OFDM) waveform and a first modulation scheme, whereby the first modulation scheme includes 16-QAM or 64QAM.

[0045] In one possible design, the number of component carriers used for uplink data transmission by the communication device is one, which may include: the communication device being configured to use a single component carrier for uplink, or the communication device being configured to use continuous CA within the uplink band, wherein only one component carrier among the multiple component carriers of the CA is used for uplink data transmission by the communication device.

[0046] In one possible design approach, the first condition may also include: the uplink channel bandwidth is less than or equal to 400 MHz.

[0047] In one possible design approach, there is a first correspondence between the DFT-S-OFDM waveform, the first modulation scheme, and the first power back-off range, wherein the first power back-off range includes the maximum power back-off value.

[0048] In one possible design, the transmitting module is further configured to transmit data to the network device using a DFT-S-OFDM waveform and a first modulation scheme, based on a first transmit power. The first transmit power is obtained after backing up the transmit power according to a first correspondence.

[0049] In one possible design approach, the first correspondence may include: when the uplink channel bandwidth is less than or equal to 200 MHz and the waveform of the transmitted data is a DFT-S-OFDM waveform, the maximum power backoff value corresponding to 16QAM is 3dB or 3.5dB, and the maximum power backoff value corresponding to 64QAM is 5dB or 5.5dB.

[0050] In one possible design approach, the first correspondence may include: when the uplink channel bandwidth is equal to 400 MHz and the waveform of the transmitted data is a DFT-S-OFDM waveform, the maximum power backoff value corresponding to 16QAM is 4.5 dB, and the maximum power backoff value corresponding to 64QAM is 6.5 dB.

[0051] In one possible design, the first indication information is carried in Radio Resource Control (RRC) signaling.

[0052] In one possible design, the communication device is a power level 3 terminal that supports operation in the frequency range 2FR2.

[0053] It should be noted that the receiving module and the sending module can be set up separately, or they can be integrated into a single module, namely the transceiver module. This application does not impose specific restrictions on the specific implementation methods of the receiving module and the sending module.

[0054] Optionally, the communication device described in the fourth aspect may further include a processing module and a storage module, the storage module storing programs or instructions. When the processing module executes the program or instructions, the communication device described in the fourth aspect can perform the method described in the second aspect.

[0055] It should be noted that the communication device described in the fourth aspect can be a terminal device, or a chip (system) or other component or assembly that can be set in the terminal device, and this application does not limit it in this regard.

[0056] The technical effects of the communication device described in the fourth aspect can be referred to the technical effects of the communication method described in any possible implementation of the second aspect, and will not be repeated here.

[0057] Fifthly, a communication device is provided. The communication device includes a processor configured to execute the communication method as described in any of the possible implementations of the first to second aspects.

[0058] Furthermore, the technical effects of the communication device described in the fifth aspect can be referred to the technical effects of the communication method described in any of the implementations of the first to second aspects, and will not be repeated here.

[0059] Sixthly, a communication device is provided. The communication device includes a processor coupled to a memory for storing computer programs.

[0060] The processor is used to execute a computer program stored in memory so that the communication method described in any of the possible implementations of the first to second aspects is executed.

[0061] In one possible design, the communication device described in the sixth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an input / output port. The transceiver can be used by the communication device to communicate with other devices.

[0062] It should be noted that the input port can be used to implement the receiving function involved in the first and second aspects, and the output port can be used to implement the transmitting function involved in the first and second aspects.

[0063] In this application, the communication device described in the sixth aspect can be a network device or a terminal device, or a chip or chip system disposed inside the network device or terminal device.

[0064] Furthermore, the technical effects of the communication device described in the sixth aspect can be referred to the technical effects of the communication method described in any of the implementations of the first to second aspects, and will not be repeated here.

[0065] A seventh aspect provides a communication system. The communication system includes a communication device as described in the third aspect and a communication device as described in the fourth aspect. Alternatively, the communication system includes a communication device as described in the third aspect for implementing the method as described in the first aspect, and a communication device as described in the fourth aspect for implementing the method as described in the second aspect.

[0066] Eighthly, a chip system is provided, comprising logic circuitry and input / output ports. The logic circuitry implements the processing functions described in the first and second aspects, and the input / output ports implement the transmission and reception functions described in the first and second aspects. Specifically, the input ports can be used to implement the receiving functions described in the first and second aspects, and the output ports can be used to implement the transmitting functions described in the first and second aspects.

[0067] In one possible design, the chip system also includes a memory for storing program instructions and data for implementing the functions involved in the first and second aspects.

[0068] This chip system can consist of chips or include chips and other discrete components.

[0069] A ninth aspect provides a computer-readable storage medium storing a computer program or instructions; when the computer program or instructions are executed on a computer, the communication method described in any of the possible implementations of the first to second aspects is performed.

[0070] In a tenth aspect, a computer program product is provided, comprising a computer program or instructions that, when executed on a computer, cause the communication method described in any of the possible implementations of the first to second aspects to be executed. Attached Figure Description

[0071] Figure 1 This application provides a schematic diagram of the architecture of a communication system.

[0072] Figure 2 This is a schematic diagram of an application scenario provided by an embodiment of this application;

[0073] Figure 3 A flowchart illustrating a communication method provided in an embodiment of this application;

[0074] Figure 4 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0075] Figure 5 This is a schematic diagram of another communication device provided in an embodiment of this application. Detailed Implementation

[0076] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0077] The technical solutions of this application can be applied to various communication systems, such as fifth-generation (5G) mobile communication systems, new radio (NR) systems, and future communication systems, such as sixth-generation (6G) mobile communication systems.

[0078] This application will present various aspects, embodiments, or features relating to systems that may include multiple devices, components, modules, etc. It should be understood and appreciated that individual systems may include additional devices, components, modules, etc., and / or may not include all the devices, components, modules, etc. discussed in conjunction with the accompanying drawings. Furthermore, combinations of these approaches are also possible.

[0079] Furthermore, in the embodiments of this application, words such as "exemplarily" and "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as an "example" in this application should not be construed as being better or more advantageous than other embodiments or designs. Rather, the use of the word "example" is intended to present the concept in a specific manner.

[0080] In the embodiments of this application, "of", "corresponding (relevant)" and "corresponding" can sometimes be used interchangeably. It should be noted that when their differences are not emphasized, their meanings are consistent.

[0081] The network architecture and business scenarios described in the embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0082] To facilitate understanding of the embodiments of this application, let's first take... Figure 1 The communication system illustrated herein is used as an example to illustrate a communication system applicable to embodiments of this application. For example, Figure 1 This is a schematic diagram of the architecture of a communication system to which the communication method provided in the embodiments of this application is applicable.

[0083] like Figure 1 As shown, the communication system includes network devices and terminal devices. Optionally, there can be one or more network devices.

[0084] The aforementioned network devices can also be called access devices, access network devices, or wireless access network devices. Network devices can manage wireless resources, provide access services for terminal devices, and complete the forwarding of data between terminal devices and the core network. Network devices can also be understood as base stations in the network.

[0085] For example, the network device in this application embodiment can be any communication device with wireless transceiver function for communicating with terminal devices. This network equipment includes, but is not limited to: evolved Node B (eNB), radio network controller (RNC), Node B (NB), base station controller (BSC), base transceiver station (BTS), home evolved Node B (HeNB, or home Node B (HNB), base band unit (BBU), access point (AP), wireless relay node, wireless backhaul node, transmission point (TP), or TRP in a wireless fidelity (WiFi) system. It can also be a 5G system, such as a gNB in ​​an NR system, or a transmission point (TRP or TP), one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or transmission point, such as a base band unit (BBU) or a distributed unit (DU). It can also be a satellite, a drone, or a next-generation base station in a 6G mobile communication system, or an open access network (ORAN). Access network equipment or modules of access network equipment in RAN (Organizational Random Access Network) systems, base stations in future mobile communication systems, or access nodes in WiFi systems, etc.

[0086] In some deployments, a gNB can be a module or unit that performs some of the functions of a base station. A gNB can be a centralized unit (CU), a DU, a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. A gNB can also include an active antenna unit (AAU). The CU implements some of the gNB's functions, and the DU implements others. For example, the CU is responsible for handling non-real-time protocols and services, implementing the functions of the RRC and Packet Data Convergence Protocol (PDCP) layers. The DU is responsible for handling physical layer protocols and real-time services, implementing the functions of the radio link control (RLC), MAC, and physical (PHY) layers. The AAU implements some physical layer processing functions, radio frequency processing, and related functions of the active antenna. RRC layer information is generated by the CU and is ultimately encapsulated by the DU's PHY layer to become PHY layer information, or it may be derived from PHY layer information. Therefore, under this architecture, higher-layer signaling such as RRC layer signaling can also be considered as being sent by DU, or by DU+AAU. It is understood that network devices can be one or more of the following: CU nodes, DU nodes, and AAU nodes. Furthermore, CU can be classified as a network device in the radio access network (RAN) or a network device in the core network (CN); this application does not limit this. In the ORAN system, CU can also be called O-CU, DU can also be called open (O)-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CUP-UP, and RU can also be called O-RU.

[0087] Network devices may include CUs and DUs. This design can be referred to as CU and DU separation. Multiple DUs can be centrally controlled by a single CU. As an example, the interface between the CU and DU is called an F1 interface. The control plane interface can be F1-C, and the user plane interface can be F1-U. This application does not limit the specific names of the interfaces. CUs and DUs can be separated according to the protocol layer of the wireless network: for example, the functions of PDCP layer and above (e.g., RRC layer and SDAP layer) are set in the CU, and the functions of protocol layers below PDCP layer (e.g., RLC layer, MAC layer and PHY layer) are set in the DU; or, for example, the functions of protocol layers above PDCP layer are set in the CU, and the functions of protocol layers below PDCP layer are set in the DU, without restriction.

[0088] The above division of CU and DU processing functions according to protocol layers is merely an example; other methods can also be used. For instance, CUs or DUs can be divided into those with more protocol layer functions, or they can be divided into those with partial protocol layer processing functions. For example, some functions of the RLC layer and the protocol layer functions above the RLC layer can be placed in the CU, while the remaining functions of the RLC layer and the protocol layer functions below the RLC layer can be placed in the DU. Furthermore, the functions of CUs or DUs can be divided according to service type or other system requirements, such as by latency. Functions that need to meet latency requirements can be placed in the DU, while functions that do not need to meet this latency requirement can be placed in the CU.

[0089] Optionally, the CU may have one or more core network functions.

[0090] Optionally, the radio unit (RU) of the DU can be remotely located. The RU has radio frequency (RF) functionality. For example, the DU and RU can be separated at the PHY layer. For instance, the DU can implement higher-level functions in the PHY layer, and the RU can implement lower-level functions. When transmitting, the PHY layer functions may include at least one of the following: adding cyclic redundancy check (CRC) bits, channel coding, rate matching, scrambling, modulation, layer mapping, precoding, resource mapping, physical antenna mapping, or RF transmission functionality. When receiving, the PHY layer functions may include at least one of the following: CRC check, channel decoding, rate matching de-scrambling, demodulation, layer mapping de-mapping, channel detection, resource demapping, physical antenna demapping, or RF reception functionality. The higher-level functions in the PHY layer may include a portion of the PHY layer's functionality, which is closer to the MAC layer; the lower-level functions in the PHY layer may include another portion of the PHY layer's functionality, for example, a portion closer to the RF functionality. For example, higher-level functions in the PHY layer may include adding CRC bits, channel coding, rate matching, scrambling, modulation, and layer mapping, while lower-level functions may include precoding, resource mapping, physical antenna mapping, and RF transmission functions; or, higher-level functions in the PHY layer may include adding CRC bits, channel coding, rate matching, scrambling, modulation, layer mapping, and precoding, while lower-level functions may include resource mapping, physical antenna mapping, and RF transmission functions. For example, higher-level functions in the PHY layer may include CRC checksum, channel decoding, rate matching de-matching, decoding, demodulation, and layer mapping de-matching, while lower-level functions may include channel detection, resource de-mapping, physical antenna de-mapping, and RF reception functions; or, higher-level functions in the PHY layer may include CRC checksum, channel decoding, rate matching de-matching, decoding, demodulation, layer mapping de-matching, and channel detection, while lower-level functions may include resource de-mapping, physical antenna de-mapping, and RF reception functions.

[0091] Optionally, the functions of the CU can be further divided, separating the control plane and the user plane and implementing them through different entities. The separated entities are the control plane CU entity (i.e., the CU-CP entity) and the user plane CU entity (i.e., the CU-UP entity). The CU-CP entity and the CU-UP entity can be connected to the DU respectively. In this application, an entity can be understood as a module or unit, and its form can be a hardware structure, a software module, or a hardware structure plus a software module, without limitation.

[0092] Optionally, any one of CU, CU-CP, CU-UP, DU, and RU can be a software module, a hardware structure, or a combination of software and hardware structures, without limitation. The different entities can exist in the same or different forms. For example, CU, CU-CP, CU-UP, and DU are software modules, and RU is a hardware structure. For the sake of brevity, not all possible combinations are listed here. These modules and the methods they execute are also within the scope of protection of this application. For example, when the method of this application is executed by a network device, it can be specifically executed by at least one of CU, CU-CP, CU-UP, DU, or RU. For example, it can be specifically executed by CU.

[0093] The aforementioned terminal equipment is a terminal that accesses a communication system and has wireless transceiver capabilities, or a chip or chip system that can be installed in the terminal. The terminal equipment in this application may also be referred to as a terminal, user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, wireless communication equipment, user agent, or user device. The terminals in the embodiments of this application may be mobile phones, tablets, drones, computers with wireless transceiver capabilities, customer premise equipment (CPE), virtual reality (VR) terminals, augmented reality (AR) terminals, Internet of Things (IoT) terminals, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to a wireless modem, in-vehicle devices, wearable devices, terminals in 5G networks, or terminals in future evolved networks, etc.

[0094] For example, the terminal equipment in this application can be a delivery terminal in smart logistics (e.g., equipment that can monitor the location of cargo vehicles, equipment that can monitor the temperature and humidity of cargo, etc.), a wireless terminal in smart agriculture (e.g., wearable devices that can collect relevant data on poultry and livestock, etc.), a wireless terminal in smart buildings (e.g., smart elevators, fire monitoring equipment, and smart meters, etc.), a wireless terminal in smart healthcare (e.g., wearable devices that can monitor the physiological state of humans or animals), a wireless terminal in smart transportation (e.g., smart buses, smart vehicles, shared bicycles, charging pile monitoring equipment, smart traffic lights, smart monitoring, and smart parking equipment, etc.), and a wireless terminal in smart retail (e.g., vending machines, self-checkout machines, and unmanned convenience stores, etc.). For example, the terminal equipment in this application can be an on-board module, on-board unit, on-board component, on-board chip, or on-board unit built into a vehicle as one or more components or units. The vehicle can implement the methods provided in this application through the built-in on-board module, on-board unit, on-board component, on-board chip, or on-board unit.

[0095] Network devices and / or terminal devices can be fixed or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; on water; or in the air on aircraft, balloons, and satellites. This disclosure does not limit the application scenarios of the network devices and terminal devices. They can be deployed in the same or different scenarios; for example, both network devices and terminal devices can be deployed on land simultaneously; or, network devices can be deployed on land and terminal devices on water, etc., and so on.

[0096] Optional, Figure 1 The communication system shown can be applied to the communication network currently under discussion, or to other networks in the future, etc., and the embodiments of this application do not specifically limit it.

[0097] It should be noted that the communication method provided in the embodiments of this application can be applied to... Figure 1 For any two nodes shown, the specific implementation can be found in the following method embodiments, which will not be repeated here.

[0098] It should be noted that the solutions in the embodiments of this application can also be applied to other communication systems, and the corresponding names can be replaced by the names of the corresponding functions in other communication systems.

[0099] It should be understood that Figure 1 This is a simplified diagram for ease of understanding only. The communication system may also include other network devices and / or other terminal devices. Figure 1 It was not drawn in the middle.

[0100] To make the embodiments of this application clearer, the following provides a unified introduction to some of the contents and concepts related to the embodiments of this application.

[0101] First, sending / receiving:

[0102] In this application, sending information (e.g., first indication information) to a terminal device can be understood as the destination of the information being the terminal device. For example, module A sending information to the terminal includes: module A sending the information to the terminal via the air interface; optionally, module A may perform baseband and / or mid-radio frequency operations on the information; or, module A submits the information to module B, which then sends the information to the terminal. When module B sends the information to the terminal, it may do so by transparently transmitting the information, segmenting the information before sending it, or multiplexing the information with other information before sending it. Optionally, module B may perform baseband and / or mid-radio frequency operations on the information before sending it. Optionally, module B may encapsulate the information in a data packet. Optionally, module B may also add a header and / or padding bits to the data packet.

[0103] In this application, receiving information from a terminal device can be understood as the information originating from the terminal device. For example, module A receiving information from the terminal device includes: module A receiving the information from the terminal via an air interface; optionally, module A may perform baseband and / or mid-radio frequency operations on the information; or, module B receiving the information from the terminal via an air interface and delivering the information to module A. Module B delivering the information to module A includes: transparently delivering the received information to module A, combining multiple received segments into the received information and then delivering it to module A, or extracting the information from multiplexed information and then delivering it to module A. Optionally, module B may perform baseband and / or mid-radio frequency operations on the received information and then transmit the information. Optionally, the information received by module B is encapsulated in a data packet. Optionally, the data packet includes a header and / or padding bits.

[0104] The above-mentioned module B can be a single module or multiple modules coupled sequentially, without restriction. For example, module A is the DU module and module B is the RU module; or, for another example, module A is the CU-CP module and module B is both the DU and RU modules.

[0105] Second, the modulation waveform:

[0106] The modulation waveforms include DFT-S-OFDM and CP-OFDM waveforms. Uplink communication supports both DFT-S-OFDM and CP-OFDM waveforms.

[0107] The specific descriptions of CP-OFDM waveforms and DFT-S-OFDM waveforms are shown in Table 1.

[0108] Table 1 shows the modulation schemes, RB resource allocation, peak-to-average power ratio (PAPR), and MPR values ​​supported by the modulation waveforms CP-OFDM and DFT-S-OFDM, respectively.

[0109] As shown in Table 1, the modulation schemes supported by CP-OFDM waveforms include QPSK, 16QAM, 64QAM, and above. The modulation schemes supported by DFT-S-OFDM waveforms include Pi / 2BPSK, QPSK, 16QAM, 64QAM, and above. Among these, Pi / 2BPSK and QPSK are low-order modulation schemes with lower data transmission rates. 16QAM and 64QAM are high-order modulation schemes with higher data transmission rates.

[0110] Table 1

[0111]

[0112] The CP-OFDM waveform supports a codeword count of 1, and the DFT-S-OFDM waveform supports a codeword count of 1.

[0113] The CP-OFDM waveform supports 1 to 4 layers, while the DFT-S-OFDM waveform supports 1 to 2 layers.

[0114] CP-OFDM waveforms support both single-stream and multi-stream transmission. DFT-S-OFDM waveforms also support both single-stream and multi-stream transmission. Single-stream transmission means that only one data stream can be transmitted simultaneously. Multi-stream transmission means that multiple data streams can be transmitted simultaneously, which can improve system capacity; for example, multi-stream transmission can be achieved through spatial multiplexing.

[0115] The RB resource allocation supported by CP-OFDM waveforms can be continuous or discontinuous. The RB resource allocation supported by DFT-S-OFDM waveforms is continuous. For example, in a component carrier transmitting data based on a CP-OFDM waveform, the RBs for transmitting data can be continuous or discontinuous. In a component carrier transmitting data based on a DFT-S-OFDM waveform, the RBs for transmitting data are continuous.

[0116] The PAPR of CP-OFDM waveforms is higher than that of DFT-S-OFDM waveforms. A higher PAPR can lead to nonlinear distortion of the signal and degraded system performance.

[0117] The MPR of CP-OFDM waveforms is generally higher than that of DFT-S-OFDM waveforms. The magnitude of the power back-off value is related to the uplink modulation waveform, terminal type, and modulation method, etc., which can be referred to the corresponding explanation in "Third, Power Back-off" below.

[0118] Higher uplink transmit power results in better uplink coverage and user experience. With the same transmit power before power back-off, a lower MPR (Maximum Transmission Ratio) leads to higher transmit power after power back-off, resulting in better uplink coverage and user experience. Therefore, using a waveform with a lower MPR provides greater coverage gain and a better user experience compared to using a waveform with a higher MPR.

[0119] Third, power rollback:

[0120] When terminal devices communicate with network devices, wireless signals fluctuate. As the wireless signal passes through the terminal device's power amplifier (PA), due to the non-linear characteristics of the power amplifier, if the transmission power of the wireless signal is in the non-linear region, signal distortion will occur. Therefore, it is necessary to perform power back-off to ensure that the transmission power of the wireless signal is in the linear region.

[0121] The maximum power back-off (MPR) value is related to the uplink modulation waveform, terminal type, and modulation method.

[0122] The power back-off range of the power level 3 terminal equipment in frequency range 2 (referred to as FR2 PC3 terminal equipment) is described below with reference to Tables 2-6. The power level 3 terminal equipment in frequency range 2 is also called the millimeter wave PC3 terminal equipment.

[0123] Table 2

[0124]

[0125] Table 3

[0126]

[0127] (1) Under the condition that the terminal device is configured as a single component carrier and the uplink and downlink channel bandwidths are consistent (also known as the non-CA scenario or single CC scenario), the power back-off range of the terminal device with terminal type FR2 PC3 is shown in Tables 2 and 3. Among them, the uplink and downlink channel bandwidths BW channel Maximum power back-off value (MPR) at ≤200 MHz WT As shown in Table 2, the uplink and downlink channel bandwidths (BW) are... channel Maximum power back-off value (MPR) at 400MHz WT As shown in Table 3.

[0128] Internal RB allocations refer to RBs allocated to terminal equipment that are within (or near the middle) of the channel bandwidth. For example, with a channel bandwidth of 200MHz, an internal RB could refer to an RB located in the middle (100MHz) of the 200MHz band.

[0129] Edge RB allocations refer to RBs allocated to terminal equipment that are located at the edge (or near the middle) of the channel bandwidth. For example, with a channel bandwidth of 200MHz, an edge RB could refer to an RB located at the edge of the 200MHz band (199MHz).

[0130] As can be seen from Tables 2 and 3, the maximum power back-off value of the terminal device varies under different conditions.

[0131] Referring to Table 2, taking the allocated internal RB as an example, the maximum power back-off value (MPR) corresponding to the QPSK modulation method of the DFT-S-OFDM waveform is shown. WT =0dB, the maximum power back-off value (MPR) corresponding to the QPSK modulation mode of the CP-OFDM waveform. WT =3.5dB, other details are shown in Table 2. It can be seen that, under the same modulation method, the maximum power back-off value of the DFT-S-OFDM waveform is less than that of the CP-OFDM waveform.

[0132] Thus, when the terminal device is configured with a single component carrier and the uplink and downlink channel bandwidths are the same, using a waveform with a lower MPR can achieve greater coverage gain and a better user experience compared to using a waveform with a higher MPR.

[0133] (2) In the CA scenario, under the following special conditions: the terminal device is configured as a single uplink CC, and the RBs of the data transmitted in the component carriers used for uplink data transmission by the terminal device are continuous, and the uplink channel bandwidth of the terminal device is less than or equal to 400 MHz; or, the terminal device is configured as continuous uplink CA, and only one component carrier in the multiple component carriers of CA is used for uplink data transmission by the terminal device, and the RBs of the data transmitted in the component carriers used for uplink data transmission by the terminal device are continuous, and the uplink channel bandwidth of the terminal device is less than or equal to 400 MHz, if the terminal device (terminal device of terminal type FR2 PC3) adopts the DFT-s-OFDM waveform, power back-off can be performed based on the Pi / 2BPSK or QPSK modulation methods shown in Tables 2 and 3 above, as shown in Tables 4 and 5.

[0134] Table 4

[0135]

[0136] Table 5

[0137]

[0138] In CA scenarios, if the terminal device (terminal device of terminal type FR2 PC3) uses CP-OFDM waveform (regardless of whether the above special conditions are met), power back-off is performed based on Table 6 below. Under conditions other than the above special conditions (where the terminal device is configured for continuous uplink CA and the terminal device uses at least two of the multiple CCs of CA for uplink data transmission (no downlink limitation)), if the terminal device (terminal device of terminal type FR2 PC3) uses DFT-s-OFDM waveform, power back-off is performed based on Table 6 below.

[0139] Table 6 shows the maximum power backoff values ​​for uplink channel bandwidths of 400MHz or less, 400MHz or more but less than 800MHz, 800MHz or more but less than or equal to 1400MHz, and 1400MHz or more but less than or equal to 2400MHz.

[0140] For example, a terminal device configured as a CA can support simultaneous data transmission and / or reception on multiple CCs, achieving high throughput and high transmission rate. For instance, a CA terminal device can transmit data simultaneously on four CCs.

[0141] Multiple CCs in a CA can include a primary component carrier (PCC) and a secondary component carrier (SCC). The PCC is the component carrier that the terminal device uses to establish the initial connection, while the SCC is the component carrier that provides additional frequency band resources.

[0142] In this application, the CA scenario refers to a scenario where the uplink is configured as CA and / or the downlink is configured as CA. In other words, the CA scenario refers to a scenario where at least one of the uplink and downlink is configured as CA.

[0143] In this application, a single CC scenario refers to a scenario where both uplink and downlink are configured as a single CC.

[0144] Table 6

[0145]

[0146] In some embodiments, different rules can be used for power backoff depending on the location of the terminal device within the network device's coverage area.

[0147] Figure 2This is a schematic diagram of an application scenario provided by an embodiment of this application.

[0148] Combination Figure 2 When a terminal device is located far from the network device's coverage area, coverage and channel conditions are poor. Generally, the coverage and channel conditions at such locations only support single-component carrier and low-order modulation methods such as Pi / 2BPSK and QPSK. 16QAM and 64QAM are high-order modulation methods, resulting in larger data volumes. Under poor coverage and channel conditions, using 16QAM and 64QAM may lead to data transmission failure. Therefore, when a terminal device is located far from the network device's coverage area (where both uplink and downlink only support single-component carrier (in a single-CC scenario)), the terminal device performs power backoff based on the rules shown in Tables 2 and 3 above.

[0149] Because DFT-S-OFDM waveforms are superior to CP-OFDM waveforms in terms of PAPR and MPR, they are generally used for data transmission when the terminal device is located far from the network equipment's coverage area to achieve better system performance and higher transmission rates. Referring to Tables 4 and 5, using DFT-S-OFDM waveforms results in a 2dB-5dB less power backoff compared to using CP-OFDM waveforms, leading to greater coverage gain and a better user experience.

[0150] Combination Figure 2 When the terminal device is located in the near-center of the network equipment coverage area, the coverage and channel conditions are good. The coverage and channel conditions in the near-center can support single CC or multiple CC data transmission, as well as Pi / 2BPSK, QPSK, 16QAM, 64QAM and above modulation methods.

[0151] Thus, in a CA scenario, if the terminal device uses at least two of the multiple CCs of the CA for uplink data transmission, the terminal device can perform power backoff based on the rules shown in Table 6 above. The data transmission rate is high, and the power backoff is the same when using the DFT-S-OFDM waveform compared to using the CP-OFDM waveform, with no power backoff benefit.

[0152] In CA scenarios, if the terminal device uses a single CC for uplink data transmission and uses a DFT-S-OFDM waveform, the terminal device performs power back-off according to the rules shown in Tables 4 and 5 above. If the terminal device uses a single CC for uplink data transmission and uses a CP-OFDM waveform, the terminal device performs power back-off according to the rules shown in Table 6 above. Due to the good coverage and channel conditions at near-center points, terminal devices generally use CP-OFDM waveforms and 16QAM or 64QAM modulation for uplink data transmission (power back-off according to Table 6), resulting in high data transmission rates. However, the maximum power back-off value of the CP-OFDM waveform is higher (higher than the maximum power back-off value of the DFT-S-OFDM waveform shown in Tables 4 and 5), meaning that using the CP-OFDM waveform cannot take advantage of the lower maximum power back-off value of the DFT-S-OFDM waveform.

[0153] Therefore, to fully utilize the advantage of low maximum power backoff value of DFT-S-OFDM waveform, it is necessary to ensure the transmission rate and improve the data transmission rate of terminal equipment using DFT-S-OFDM waveform when using single CC in CA scenario.

[0154] This application provides a communication method that expands the modulation schemes available for the DFT-S-OFDM waveform in a CA scenario using a single CC uplink, enabling the use of 16QAM, 64QAM, or higher-order modulation schemes in a CA scenario with a single CC uplink. 16QAM, 64QAM, and higher-order modulation schemes are high-order modulation schemes. Using 16QAM, 64QAM, or higher-order modulation schemes results in a larger number of bits in the modulated information compared to using Pi / 2BPSK or QPSK modulation schemes, thereby increasing the data transmission rate.

[0155] Based on the network architecture and application scenarios described above, the following will combine... Figure 3 The communication methods provided in the embodiments of this application are described in detail. The actions, terminology, etc., involved in the various embodiments of this application can be referred to interchangeably without limitation. The object names or parameter names in the embodiments of this application are merely examples; other names may be used in specific implementations without limitation.

[0156] For example, Figure 3 This is a flowchart illustrating a communication method provided in an embodiment of this application.

[0157] like Figure 3 As shown, the communication method includes the following steps:

[0158] S301, under the condition that the first condition is met, the network device sends a first instruction message to the terminal device. Accordingly, the terminal device receives the first instruction message from the network device.

[0159] For example, the terminal device is a terminal that supports power level 3 operating in frequency range 2.

[0160] For example, the first condition includes: in the CA scenario, the number of component carriers used by the terminal device for uplink data transmission is one.

[0161] For example, a CA scenario may include: the uplink being configured as CA and / or the downlink being configured as CA. See Table 6 above for details.

[0162] For example, the network device determines whether the first condition is met based on the information it has configured. For instance, the network device confirms the uplink component carrier / downlink component carrier it has configured for the terminal device. If the network device has configured uplink CA and / or downlink CA for the terminal device, the network device confirms that the CA scenario is met. It further confirms whether only one component carrier is scheduled for the terminal device to perform uplink data transmission. If so, the first condition is confirmed to be met; otherwise, the first condition is not met.

[0163] In some embodiments, the number of component carriers used by the terminal device for uplink data transmission is one, which may include: the terminal device being configured to use a single uplink component carrier, and the RBs (Radius Blocks) transmitting data in the component carrier used by the terminal device for uplink data transmission being continuous. That is, the terminal device is configured to use a single uplink component carrier and uses this single component carrier for uplink data transmission, and the RBs in the component carrier used by the terminal device are continuous.

[0164] Alternatively, in some embodiments, the number of component carriers used by the terminal device for uplink data transmission is one. This may include: the terminal device being configured as an uplink in-band continuous CA, and only one component carrier among the multiple component carriers of the CA being used for uplink data transmission by the terminal device, and the RBs (Radius Blocks) transmitting data in the component carrier used for uplink data transmission by the terminal device being continuous. In other words, the terminal device is configured as an uplink CA, but the terminal device uses only one component carrier for uplink data transmission, and the RBs in the component carrier used by the terminal device are continuous.

[0165] For example, the network device confirms the uplink component carrier / downlink component carrier configured for the terminal device. If the network device configures uplink CA and / or downlink CA for the terminal device, the network device confirms that the CA scenario is met. It then further determines whether the terminal device is configured with a single uplink component carrier or continuous uplink CA. If a single uplink component carrier is configured for the terminal device, it further confirms whether the data transmission base (RB) of the component carrier used for uplink data transmission by the terminal device is continuous. If so, the first condition is met; otherwise, the first condition is not met. If continuous uplink CA is configured for the terminal device, it further confirms whether only one component carrier of the multiple component carriers of CA is scheduled for uplink data transmission by the terminal device, and confirms whether the data transmission base (RB) of the component carrier used for uplink data transmission by the terminal device is continuous. If so, the first condition is met; otherwise, the first condition is not met.

[0166] Optionally, the first condition may also include: the uplink channel bandwidth is less than or equal to 400 MHz.

[0167] For example, the network device can further confirm whether the uplink channel bandwidth configured for the terminal device is less than or equal to 400 MHz. If so, the first condition is confirmed to be met; otherwise, the first condition is confirmed not to be met.

[0168] For example, the first condition may include: in the CA scenario, the terminal device is configured to transmit data via a single uplink component carrier, and the RBs transmitting data in the component carrier used by the terminal device for uplink data transmission are continuous, and the uplink channel bandwidth is less than or equal to 400 MHz.

[0169] For example, the first condition may include: in the CA scenario, the terminal device is configured as uplink continuous CA, and only one component carrier among the multiple component carriers of CA is used for uplink data transmission by the terminal device, and the RBs transmitting data in the component carrier used for uplink data transmission by the terminal device are continuous, and the uplink channel bandwidth is less than or equal to 400 MHz.

[0170] For example, the first indication information is used to indicate uplink transmission using a DFT-S-OFDM waveform and a first modulation scheme.

[0171] For example, the first modulation scheme may include 16QAM, 64QAM, or 64QAM or higher.

[0172] For example, the first indication information is used to instruct the terminal device to use DFT-S-OFDM waveform and 16QAM for uplink transmission, or the first indication information is used to instruct the terminal device to use DFT-S-OFDM waveform and 64QAM for uplink transmission, which will not be elaborated one by one.

[0173] Therefore, this application expands the modulation schemes that can be used in CA scenarios with a single CC in the uplink, extending them to 16QAM, 64QAM, and higher. 16QAM, 64QAM, and higher are high-order modulation schemes. Using 16QAM, 64QAM, or higher modulation schemes results in a larger number of bits in the modulated information compared to using Pi / 2BPSK or QPSK modulation schemes, thereby increasing the data transmission rate.

[0174] Optionally, the first indication information may be carried in RRC signaling.

[0175] For example, the first indication information includes information about the DFT-S-OFDM waveform, which is carried in the RRC signaling and is used to indicate the use of the DFT-S-OFDM waveform.

[0176] For example, the first indication information may be carried in an RRC reconfiguration message. For instance, the first indication information may be carried in a transform precoder cell of the RRC reconfiguration message.

[0177] In some embodiments, there is a first correspondence between the DFT-S-OFDM waveform, the first modulation scheme, and the first power back-off range.

[0178] Optionally, the first power back-off range may include the maximum power back-off value.

[0179] In other words, the first correspondence includes the correspondence between the DFT-S-OFDM waveform, the first modulation method, and the first power back-off range.

[0180] Thus, after receiving the first instruction information, the terminal device can select the first power back-off range (corresponding to the waveform and modulation method used) from the first correspondence to perform power back-off, ensuring that the transmission power is in the linear region of the power amplifier, thereby ensuring system performance.

[0181] For example, the first correspondence includes: 16QAM of the DFT-S-OFDM waveform corresponds to the first power back-off range 1, and / or 64QAM of the DFT-S-OFDM waveform corresponds to the first power back-off range 2.

[0182] For example, the first correspondence may include: when the uplink channel bandwidth is less than or equal to 200 MHz and the waveform of the transmitted data is a DFT-S-OFDM waveform, the maximum power backoff value corresponding to 16QAM is 3 dB or 3.5 dB, and the maximum power backoff value corresponding to 64QAM is 5 dB or 5.5 dB; and / or, when the uplink channel bandwidth is equal to 400 MHz and the waveform of the transmitted data is a DFT-S-OFDM waveform, the maximum power backoff value corresponding to 16QAM is 4.5 dB, and the maximum power backoff value corresponding to 64QAM is 6.5 dB.

[0183] For example, the first correspondence may include the correspondence related to DFT-s-OFDM shown in Table 7 and / or Table 8. After receiving the first indication information, the terminal device can determine the maximum power back-off value corresponding to the waveform and modulation method indicated by the first indication information from Table 7 or Table 8, and perform power back-off to ensure that the transmission power is in the linear region of the power amplifier, thereby ensuring system performance.

[0184] Table 7

[0185]

[0186] Table 8

[0187]

[0188] Optionally, the first correspondence may be pre-configured in the network device or the terminal device. Alternatively, the first correspondence may be sent from the network device to the terminal device.

[0189] Combining Tables 7 and 8 above, as well as Table 6, using the DFT-S-OFDM waveform results in less transmit power back-off compared to using the CP-OFDM waveform. For example, the transmit power can be backed down by 2dB-2.5dB less (the maximum power back-off value corresponding to the DFT-S-OFDM waveform in Table 8 is obtained by comparing it with the maximum power back-off value corresponding to the CP-OFDM waveform in Table 6; for 16QAM, 6.5-4.5=2; for 64QAM, 9-6.5=2.5). The back-off transmit power is greater, resulting in greater coverage gain, higher transmission rate, and a better user experience.

[0190] S302, the terminal device sends data to the network device using a DFT-S-OFDM waveform and a first modulation scheme. Correspondingly, the network device receives data from the terminal device using a DFT-S-OFDM waveform and a first modulation scheme.

[0191] If the first indication information indicates that DFT-S-OFDM waveform and the first modulation method are used for uplink transmission, the terminal device will send data to the network device according to the indication information, using DFT-S-OFDM waveform and the first modulation method. The first modulation method includes 16QAM, 64QAM, or 64QAM or higher. Compared with using Pi / 2BPSK or QPSK, it can obtain a higher data transmission rate. Therefore, it can improve the data transmission rate of the terminal device when using single CC transmission for uplink data transmission in CA scenarios.

[0192] In one possible design, S302 may include: the terminal device using a DFT-S-OFDM waveform and a first modulation scheme to transmit data to the network device based on a first transmission power.

[0193] Optionally, the first transmission power is obtained by the terminal device after performing a transmission power backoff based on the first correspondence.

[0194] For example, the first transmit power = the maximum transmit power before backoff - the maximum power backoff value, where the maximum transmit power is determined by the terminal device from the first correspondence based on the DFT-S-OFDM waveform and the first modulation method.

[0195] For example, referring to Tables 7 and 8, assuming the first indication information instructs the terminal device to use DFT-S-OFDM waveform and 16QAM for uplink transmission, after receiving the first indication information, the terminal device determines the uplink and downlink channel bandwidth. If the uplink and downlink channel bandwidth is less than or equal to 200MHz, power backoff is performed based on the rules shown in Table 7. If the uplink and downlink channel bandwidth is equal to 400MHz, power backoff is performed based on the rules shown in Table 8. Assuming the uplink and downlink channel bandwidth is less than or equal to 200MHz, and the allocated RB is an internal RB, the terminal device determines the maximum power backoff value to be 3.0dB based on the rules shown in Table 7. Therefore, the first transmit power = the maximum transmit power before backoff - 3.0dB.

[0196] Alternatively, the terminal device can also send data to the network device via multi-stream transmission.

[0197] For example, terminal devices can use DFT-S-OFDM waveforms and the first modulation method to send data to network devices through multi-stream transmission, which can further improve the data transmission rate.

[0198] For example, when the terminal device is located near the network device's coverage area, in a CA scenario with single CC uplink, the terminal device uses dual-stream and DFT-S-OFDM waveforms, and transmits data using 16QAM, 64QAM, or higher. Since the maximum power backoff value of the DFT-S-OFDM waveform is lower than that of the CP-OFDM waveform, the data transmission rate of the terminal device using dual-stream, DFT-S-OFDM waveforms, and 16QAM, 64QAM, or higher is higher than that of using CP-OFDM waveforms and corresponding 16QAM, 64QAM, or higher. Therefore, this application expands the modulation schemes available for the DFT-S-OFDM waveform in a CA scenario with single CC uplink, thereby improving the data transmission rate of the terminal device at near the network device location in a CA scenario with single CC uplink.

[0199] based on Figure 3 The communication method shown, in a CA scenario, when the number of component carriers used for uplink data transmission by the terminal device is one, the network device sends a first indication message to the terminal device, instructing the terminal device to use a DFT-S-OFDM waveform and a first modulation scheme for uplink transmission. The first modulation scheme includes 16QAM or 64QAM. Compared to Pi / 2BPSK and QPSK, 16QAM and 64QAM have higher modulation orders, enabling higher data transmission rates. This improves the data transmission rate of the terminal device using the DFT-S-OFDM waveform when using a single component carrier for uplink transmission in a CA scenario.

[0200] Furthermore, using the DFT-S-OFDM waveform results in less backoff transmission power compared to using the CP-OFDM waveform, while allowing for greater transmission power after backoff, thus achieving greater coverage gain and a better user experience. Therefore, when the terminal device is near the network device's coverage area, in a CA scenario using uplink single CC, the terminal device can fully utilize the low MPR advantage of the DFT-S-OFDM waveform for uplink transmission, while also improving the data transmission rate.

[0201] In this application, unless otherwise specified, the same or similar parts between the various embodiments can be referred to each other. In the various embodiments of this application, and in the various implementation methods / methods / implementations within each embodiment, unless otherwise specified or logically conflicting, the terminology and / or descriptions between different embodiments and between the various implementation methods / methods / implementations within each embodiment are consistent and can be mutually referenced. The technical features in different embodiments and the various implementation methods / methods / implementations within each embodiment can be combined according to their inherent logical relationships to form new embodiments, implementation methods, methods, or implementation approaches. The embodiments described below do not constitute a limitation on the scope of protection of this application.

[0202] The above combination Figures 1-3 The communication method provided in the embodiments of this application is described in detail below. Figures 4-5 The communication device provided in the embodiments of this application is described in detail.

[0203] Figure 4 This is a schematic diagram of the structure of a communication device that can be used to execute the embodiments of this application.

[0204] The communication device 400 is used to implement the functions of the network element in this application. For example, the network element may be a base station (network device), terminal, DU, CU, CU-CP, CU-UP, or RU. The communication device 400 may be the network element, a device that can be installed in the network element, or a device that can be used in conjunction with the network element; there are no limitations. For example, the device may be a chip or a chip system. The communication device 400 includes an interface 401 and a processor 402. Optionally, the processor 402 is used to execute program 404. The processor 402 may store program 405, or obtain program 405 from other devices or equipment (e.g., from memory 403 or downloaded from a third-party website). Optionally, the communication device 400 includes a memory 403. The memory 403 is used to store program 405. Program 405 may be pre-stored or loaded later. Optionally, the memory 403 may also be used to store necessary data. These components work together to provide the various functions described in this application, which can be referred to in the above method embodiments, and will not be repeated here.

[0205] Processor 402 may include one or more processors as a combination of computing devices. Processor 402 may include one or more of the following: microprocessor, microcontroller, digital signal processor (DSP), digital signal processing device (DSPD), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), programmable logic device (PLD), gated logic, transistor logic, discrete hardware circuitry, processing circuitry, or other suitable hardware, firmware, and / or combinations of hardware and software configured to perform the various functions described in this application. Processor 402 may be a general-purpose processor or a special-purpose processor. For example, processor 402 may be a baseband processor or a central processing unit (CPU). A baseband processor may be used to process communication protocols and communication data. A CPU may be used to execute software programs and process data within those software programs.

[0206] Interface 401 may include any suitable hardware or software for enabling communication with one or more computer devices (such as the network elements of this application). For example, in some embodiments, interface 401 may include wires for coupling wired connections or terminals and / or pins for coupling wireless connections with wireless transceivers. In some embodiments, interface 401 may include a transmitter, a receiver, a transceiver, and / or an antenna. The interface may be configured to enable communication between computer devices (such as the network elements of this application) using any available protocol (such as 3GPP standard protocols).

[0207] In this application, "program" refers to software in a broad sense. The software can be program code, a program, a subroutine, an instruction set, code, a code segment, a software module, an application program, a software application, etc. The program can run on a processor and / or computer to perform the various functions and / or processes described in this application.

[0208] Memory 403 may store necessary data required by processor 402 when executing software. Memory 403 may be implemented using any suitable storage technology. For example, memory 403 may be any available storage medium accessible to the processor and / or computer. Non-limiting examples of storage media include: random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM), removable media, optical disc storage, magnetic disk storage media, magnetic storage devices, flash memory, registers, state memory, remote mounting memory, local or remote memory components, or any other medium that can carry or store software, data, or information and is accessible to the processor / computer.

[0209] The memory 403 and processor 402 can be configured separately or integrated together. The processor 402 can read information from, store, and / or write information to the memory 403. The memory 403 can be integrated into the processor 402. The processor 402 and memory 403 can be housed in an integrated circuit (e.g., an application-specific integrated circuit, ASIC). This integrated circuit can be located in the network element or other network node of this application.

[0210] It should be noted that, Figure 4 The structure of the communication device 400 shown does not constitute a limitation on the communication device. Actual communication devices may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0211] When the communication device is a network device or a terminal device, the communication device 400 can execute any one or more possible design schemes involved in the network device or terminal device in the above method embodiments.

[0212] Figure 5 This is a schematic diagram of another communication device provided in an embodiment of this application. Figure 5 As shown, the communication device 500 includes a receiving module 502 and a transmitting module 501, and may also include a processing module 503. For ease of explanation, Figure 5 Only the main components of the communication device 500 are shown.

[0213] In this embodiment, the communication device 500 is presented in an integrated manner, divided into various functional modules. Here, "module" can refer to a specific ASIC, circuitry, a processor and memory executing one or more software or firmware programs, integrated logic circuitry, and / or other devices that can provide the aforementioned functions. In a simplified embodiment, those skilled in the art will recognize that the communication device 500 can employ... Figure 4 The communication device 400 shown is in the form of [example device].

[0214] for example, Figure 4 The processor 402 in the communication device 400 shown can execute the communication method in the above method embodiment by calling its own stored program 404 or calling the program 405 stored in the memory 403.

[0215] Specifically, Figure 5 The functions / implementation process of the receiving module 502 and the transmitting module 501 can be understood through... Figure 4 This is achieved through interface 401 in the communication device 400 shown. Figure 5 The function / implementation process of the processing module 503 can be achieved through... Figure 4 The processor 402 in the communication device 400 shown calls its own stored program 404 or calls the program 405 stored in the memory 403 to implement the communication.

[0216] Since the communication device 500 provided in this embodiment can execute the above-described communication method, the technical effects it can achieve can be referred to the above-described method embodiments, and will not be repeated here.

[0217] In one possible design scheme, Figure 5 The communication device 500 shown is applicable to Figure 1 In the system shown, the above is executed. Figure 3 The functions of the network device in the aforementioned communication method.

[0218] The transmitting module 501 is used to send first indication information to the terminal device under a first condition. The receiving module 502 is used to receive data from the terminal device using a DFT-S-OFDM waveform and a first modulation scheme. The first condition includes: in a carrier aggregation (CA) scenario, the number of component carriers used by the terminal device for uplink data transmission is one. The CA scenario includes uplink configured as CA and / or downlink configured as CA. The first indication information is used to indicate uplink transmission using a Discrete Fourier Transform Spread Spectrum (DFT-S-OFDM) waveform and a first modulation scheme, where the first modulation scheme includes 16-QAM or 64QAM.

[0219] In one possible design, the number of component carriers used for uplink data transmission by the terminal device is one, which may include: the terminal device being configured to use a single uplink component carrier, and the RBs transmitting data in the component carrier used for uplink data transmission by the terminal device being continuous; or, the terminal device being configured to use continuous uplink CA, and only one component carrier among the multiple component carriers of the CA being used for uplink data transmission by the terminal device, and the RBs transmitting data in the component carrier used for uplink data transmission by the terminal device being continuous.

[0220] In one possible design approach, the first condition also includes: the uplink channel bandwidth is less than or equal to 400 MHz.

[0221] In one possible design approach, there is a first correspondence between the DFT-S-OFDM waveform, the first modulation scheme, and the first power back-off range, wherein the first power back-off range includes the maximum power back-off value.

[0222] In one possible design approach, the first correspondence includes: when the uplink channel bandwidth is less than or equal to 200 MHz and the waveform of the transmitted data is a DFT-S-OFDM waveform, the maximum power backoff value corresponding to 16QAM is 3dB or 3.5dB, and the maximum power backoff value corresponding to 64QAM is 5dB or 5.5dB.

[0223] In one possible design approach, the first correspondence includes: when the uplink channel bandwidth is equal to 400 MHz and the waveform of the transmitted data is a DFT-S-OFDM waveform, the maximum power backoff value corresponding to 16QAM is 4.5 dB, and the maximum power backoff value corresponding to 64QAM is 6.5 dB.

[0224] In one possible design, the first indication information is carried in Radio Resource Control (RRC) signaling.

[0225] In one possible design, the terminal device is a power level 3 terminal that supports operation in the frequency range 2FR2.

[0226] It should be noted that all relevant content of each step involved in the above method embodiments can be referenced from the functional description of the corresponding functional module, and will not be repeated here.

[0227] It should be noted that the transmitting module 501 and the receiving module 502 can be configured separately or integrated into a single module, i.e., a transceiver module. This application does not impose specific limitations on the specific implementation of the transmitting module 501 and the receiving module 502. This transceiver module can consist of transceiver circuits, transceivers, transceivers, or communication interfaces.

[0228] The transmitting module 501, also known as the transmitting unit, is used to implement one or more transmitting functions performed by the first communication device in any of the above method embodiments. The receiving module 502, also known as the receiving unit, is used to implement one or more receiving functions performed by the network device in any of the above method embodiments.

[0229] Optionally, the communication device 500 may also include a storage module. Figure 5 (Not shown in the image), the storage module stores programs or instructions. When the processing module 503 executes the program or instructions, the communication device 500 can perform the method described in any of the above method embodiments.

[0230] It should be noted that the communication device 500 may be a network device, or a chip (system) or other component or assembly that can be set in the network device; this application does not limit this.

[0231] In addition, the technical effects of the communication device 500 can be referenced. Figure 3 The technical effects of the communication method shown will not be elaborated here.

[0232] In another possible design scheme, Figure 5 The communication device 500 shown is applicable to Figure 1 In the system shown, the above is executed. Figure 3 The terminal device in the communication method is used in a carrier aggregation (CA) scenario where the number of component carriers used for uplink data transmission is one. The CA scenario includes uplink configured as CA and / or downlink configured as CA.

[0233] The receiving module 502 is used to receive first indication information from the network device. The transmitting module 501 is used to transmit data to the network device using a DFT-S-OFDM waveform and a first modulation scheme. The first indication information indicates uplink transmission using a Discrete Fourier Transform Spread Spectrum Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) waveform and a first modulation scheme, whereby the first modulation scheme includes 16-QAM or 64QAM.

[0234] In one possible design, the number of component carriers used by the communication device 500 for uplink data transmission is one, which may include: the communication device 500 being configured to use a single uplink component carrier, or the communication device 500 being configured to use continuous CA within the uplink band, wherein only one component carrier among the multiple component carriers of the CA is used by the communication device 500 for uplink data transmission.

[0235] In one possible design approach, the first condition may also include: the uplink channel bandwidth is less than or equal to 400 MHz.

[0236] In one possible design approach, there is a first correspondence between the DFT-S-OFDM waveform, the first modulation scheme, and the first power back-off range, wherein the first power back-off range includes the maximum power back-off value.

[0237] In one possible design, the transmitting module 501 is further configured to transmit data to the network device using a DFT-S-OFDM waveform and a first modulation scheme, based on a first transmit power. The first transmit power is obtained after backing up the transmit power according to a first correspondence.

[0238] In one possible design approach, the first correspondence may include: when the uplink channel bandwidth is less than or equal to 200 MHz and the waveform of the transmitted data is a DFT-S-OFDM waveform, the maximum power backoff value corresponding to 16QAM is 3dB or 3.5dB, and the maximum power backoff value corresponding to 64QAM is 5dB or 5.5dB.

[0239] In one possible design approach, the first correspondence may include: when the uplink channel bandwidth is equal to 400 MHz and the waveform of the transmitted data is a DFT-S-OFDM waveform, the maximum power backoff value corresponding to 16QAM is 4.5 dB, and the maximum power backoff value corresponding to 64QAM is 6.5 dB.

[0240] In one possible design, the first indication information is carried in Radio Resource Control (RRC) signaling.

[0241] In one possible design, the communication device 500 is a terminal that supports power level 3 operating in the frequency range 2FR2.

[0242] It should be noted that all relevant content of each step involved in the above method embodiments can be referenced from the functional description of the corresponding functional module, and will not be repeated here.

[0243] It should be noted that the transmitting module 501 and the receiving module 502 can be configured separately or integrated into a single module, i.e., a transceiver module. This application does not impose specific limitations on the specific implementation of the transmitting module 501 and the receiving module 502. This transceiver module can consist of transceiver circuits, transceivers, transceivers, or communication interfaces.

[0244] The sending module 501, also known as the sending unit, is used to implement one or more sending functions performed by the terminal device in any of the above method embodiments. The receiving module 502, also known as the receiving unit, is used to implement one or more receiving functions performed by the terminal device in any of the above method embodiments.

[0245] Optionally, the communication device 500 may also include a storage module. Figure 5(Not shown in the image), the storage module stores programs or instructions. When the processing module 503 executes the program or instructions, the communication device 500 can perform the method described in any of the above method embodiments.

[0246] It should be noted that the communication device 500 may be a terminal device, or a chip (system) or other component or assembly that can be set in the terminal device; this application does not limit this.

[0247] In addition, the technical effects of the communication device 500 can be referenced. Figure 5 The technical effects of the communication method shown will not be elaborated here.

[0248] This application provides a communication system. The communication system includes a network device and a terminal device.

[0249] In this context, the network device is used to execute the actions of the network device in the above method embodiments, and the terminal device is used to execute the actions of the terminal device in the above method embodiments. The specific execution methods and processes can be referred to the above method embodiments, and will not be repeated here.

[0250] This application provides a chip system including logic circuits and input / output ports. The logic circuits can be used to implement the processing functions involved in the communication method provided in this application, and the input / output ports can be used for the transmit / receive functions involved in the communication method provided in this application.

[0251] For example, the input port can be used to implement the receiving function of the communication method provided in the embodiments of this application, and the output port can be used to implement the sending function of the communication method provided in the embodiments of this application.

[0252] For example, the processor in communication device 400 can be used to perform, for example, but not limited to, baseband-related processing, and the transceiver in communication device 400 can be used to perform, for example, but not limited to, radio frequency transceiver. These devices can be disposed on separate chips, or at least partially or entirely on the same chip. For example, the processor can be further divided into an analog baseband processor and a digital baseband processor. The analog baseband processor can be integrated with the transceiver on the same chip, while the digital baseband processor can be disposed on a separate chip. With the continuous development of integrated circuit technology, more and more devices can be integrated on the same chip. For example, a digital baseband processor can be integrated with multiple application processors (e.g., but not limited to, graphics processors, multimedia processors, etc.) on the same chip. Such a chip can be called a system-on-a-chip (SoC). Whether to dispose of the devices independently on different chips or integrate them on one or more chips often depends on the specific needs of the product design. This application does not limit the specific implementation of the above-mentioned devices.

[0253] In one possible design, the chip system further includes a memory for storing program instructions and data that implement the functions involved in the communication methods provided in the embodiments of this application.

[0254] This chip system can consist of chips or include chips and other discrete components.

[0255] This application provides a computer-readable storage medium that stores a computer program or instructions. When the computer program or instructions are run on a computer, the communication method provided in this application is executed.

[0256] This application provides a computer program product, which includes a computer program or instructions that, when executed on a computer, cause the communication method provided in this application to be executed.

[0257] It should be understood that the processor in the embodiments of this application can be a central processing unit (CPU), or it can 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 can be a microprocessor or any conventional processor.

[0258] It should also be understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate synchronous DRAM (DDR SDRAM), enhanced synchronous DRAM (ESDRAM), synchronous linked DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0259] The above embodiments can be implemented, in whole or in part, by software, hardware (such as circuits), firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more sets of available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. A semiconductor medium can be a solid-state drive.

[0260] 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. A and B can be singular or plural. Additionally, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects, but it can also represent an "and / or" relationship. Please refer to the context for a more accurate understanding.

[0261] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0262] 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.

[0263] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0264] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0265] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0266] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0267] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0268] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0269] 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 communication method, characterized in that, include: Under the condition of satisfying the first condition, a first indication information is sent to the terminal device; wherein, the first condition includes: in the carrier aggregation (CA) scenario, the number of component carriers used by the terminal device for uplink data transmission is one; the CA scenario includes uplink configured as CA and / or downlink configured as CA, and the first indication information is used to indicate uplink transmission using orthogonal frequency division multiplexing (DFT-S-OFDM) waveform spread by discrete Fourier transform and a first modulation scheme, wherein the first modulation scheme includes 16-QAM or 64-QAM; The data from the terminal device is received using the DFT-S-OFDM waveform and the first modulation scheme.

2. The communication method according to claim 1, characterized in that, The number of component carriers used for uplink data transmission by the terminal device is one, including: the terminal device is configured as a single uplink component carrier, and the resource blocks (RBs) for transmitting data in the component carrier used for uplink data transmission by the terminal device are continuous; or, the terminal device is configured as a continuous in-band uplink CA, and only one component carrier among the multiple component carriers of the CA is used for uplink data transmission by the terminal device, and the RBs for transmitting data in the component carrier used for uplink data transmission by the terminal device are continuous.

3. The communication method according to claim 1 or 2, characterized in that, The first condition also includes: the uplink channel bandwidth is less than or equal to 400 MHz.

4. The communication method according to claim 1 or 2, characterized in that, The DFT-S-OFDM waveform, the first modulation method, and the first power back-off range have a first correspondence relationship, and the first power back-off range includes the maximum power back-off value.

5. The communication method according to claim 4, characterized in that, The first correspondence includes: when the uplink channel bandwidth is less than or equal to 200 MHz and the waveform of the transmitted data is the DFT-S-OFDM waveform, the maximum power backoff value corresponding to 16QAM is 3dB or 3.5dB, and the maximum power backoff value corresponding to 64QAM is 5dB or 5.5dB.

6. The communication method according to claim 4, characterized in that, The first correspondence includes: when the uplink channel bandwidth is equal to 400 MHz and the waveform of the transmitted data is the DFT-S-OFDM waveform, the maximum power backoff value corresponding to 16QAM is 4.5 dB and the maximum power backoff value corresponding to 64QAM is 6.5 dB.

7. The communication method according to any one of claims 1-2 and 5-6, characterized in that, The first indication information is carried in Radio Resource Control (RRC) signaling.

8. The communication method according to any one of claims 1-2 and 5-6, characterized in that, The terminal device is a terminal that supports power level 3 and operates in the frequency range 2 FR2.

9. A communication method, characterized in that, In a carrier aggregation (CA) scenario, where the number of component carriers used for uplink data transmission by a terminal device is one, wherein the CA scenario includes uplink configured as CA and / or downlink configured as CA, the method includes: Receive first indication information from network device; wherein, the first indication information is used to indicate uplink transmission using orthogonal frequency division multiplexing (DFT-S-OFDM) waveform spread by discrete Fourier transform and a first modulation scheme, the first modulation scheme including 16-QAM or 64-QAM. Data is transmitted to the network device using the DFT-S-OFDM waveform and the first modulation scheme.

10. The communication method according to claim 9, characterized in that, The number of component carriers used for uplink data transmission by the terminal device is one, including: the terminal device is configured as a single uplink component carrier, and the resource blocks (RBs) for transmitting data in the component carrier used for uplink data transmission by the terminal device are continuous; or, the terminal device is configured as a continuous in-band uplink CA, and only one component carrier among the multiple component carriers of the CA is used for uplink data transmission by the terminal device, and the RBs for transmitting data in the component carrier used for uplink data transmission by the terminal device are continuous.

11. The communication method according to claim 9 or 10, characterized in that, The DFT-S-OFDM waveform, the first modulation method, and the first power back-off range have a first correspondence relationship, and the first power back-off range includes the maximum power back-off value.

12. The communication method according to claim 11, characterized in that, Using the DFT-S-OFDM waveform and the first modulation scheme, data is transmitted to the network device, including: Using the DFT-S-OFDM waveform and the first modulation scheme, data is transmitted to the network device based on a first transmission power; wherein, the first transmission power is obtained after backing up the transmission power according to the first correspondence.

13. The communication method according to claim 11, characterized in that, The first correspondence includes: when the uplink channel bandwidth is less than or equal to 200 MHz and the waveform of the transmitted data is the DFT-S-OFDM waveform, the maximum power backoff value corresponding to 16QAM is 3dB or 3.5dB, and the maximum power backoff value corresponding to 64QAM is 5dB or 5.5dB.

14. The communication method according to claim 11, characterized in that, The first correspondence includes: when the uplink channel bandwidth is equal to 400 MHz and the waveform of the transmitted data is the DFT-S-OFDM waveform, the maximum power backoff value corresponding to 16QAM is 4.5 dB and the maximum power backoff value corresponding to 64QAM is 6.5 dB.

15. The communication method according to any one of claims 9-10 and 12-14, characterized in that, The first indication information is carried in Radio Resource Control (RRC) signaling.

16. The communication method according to any one of claims 9-10 and 12-14, characterized in that, The terminal device is a terminal that supports power level 3 and operates in the frequency range 2 FR2.

17. A communication device, characterized in that, The communication device includes a unit or module for performing the method as described in any one of claims 1 to 8.

18. A communication device, characterized in that, The communication device includes a unit or module for performing the method as described in any one of claims 9 to 16.

19. A communication device, characterized in that, The communication device includes: a processor; the processor is configured to execute the communication method as described in any one of claims 1-16.

20. A communication system, characterized in that, The communication system includes a means for performing the communication apparatus as described in claim 17 and the communication apparatus as described in claim 18.

21. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program or instructions that, when executed on a computer, cause the communication method as described in any one of claims 1-16 to be performed.

22. A computer program product, characterized in that, The computer program product includes: a computer program or instructions that, when run on a computer, cause the communication method as described in any one of claims 1-16 to be executed.

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