Communication method and communication apparatus

Abstract

The present application provides a communication method and a communication apparatus. The method comprises: performing uplink transmission / downlink transmission with an access network device, wherein whether the uplink transmission / downlink transmission between the access network device and a terminal uses a differential amplitude phase shift keying (DAPSK)-related modulation scheme or a differential phase shift keying (DPSK)-related modulation scheme is related to a first parameter of the uplink transmission / downlink transmission, and the first parameter comprises one or more of the following: a bandwidth, a subcarrier spacing, and a modulation and coding scheme (MCS). Therefore, on the basis of the method, whether the DAPSK or DPSK-related modulation scheme is used for the uplink transmission / downlink transmission may be determined on the basis of an actual communication status. The DAPSK or DPSK-related modulation scheme can be used more flexibly, which is conducive to improving transmission performance of a communication system.

Description

Communication method and communication device Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication method and a communication device. Background Art

[0002] Due to its abundant frequency resources, high-frequency (HF) has become a hot topic for research and development in the industry to address growing communication needs. Its notable features include large bandwidth and highly integrated antenna arrays for high throughput. However, HF also exhibits phase noise (PHN). High phase noise can affect the demodulation performance of modulated signals, leading to performance degradation or even inoperability of HF communication systems. To mitigate the impact of phase noise on communication system performance, correlated modulation has been proposed. During signal processing at the transmitter, the transmitter first modulates the bit data to obtain a modulated signal. This modulated signal is then correlated to obtain a correlated modulated signal. The correlated modulated signal is then subjected to a series of processing operations, including discrete Fourier transform (DFT), before being transmitted by the radio frequency to the receiver. By performing decorrelation modulation on the received signal, the receiver can obtain a modulated signal free of phase noise, thereby improving demodulation performance. For example, correlated modulation schemes include differential phase shift keying (DPSK) and differential amplitude phase shift keying (DAPSK). However, when the phase noise between the transmitter and the receiver is large, if the DPSK or DAPSK correlation modulation method is used at the transmitter for correlation modulation, the receiver may not be able to obtain an accurate demodulated signal after performing the decorrelation modulation operation on the received signal, thereby reducing the transmission performance of the communication system.

[0003] Summary of the Invention

[0004] The embodiments of the present application provide a communication method and a communication device, which are conducive to improving the transmission performance of a communication system.

[0005] In a first aspect, the present application provides a communication method, which can be executed by a terminal, or by a module (such as a processor, chip, or chip system) applied to the terminal, or by a logical node, logical module, or software that can implement all or part of the terminal functions. In the communication method, uplink transmission / downlink transmission is performed with an access network device; wherein, whether the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation mode of differential amplitude phase shift keying (DAPSK) or differential phase shift keying (DPSK) is related to a first parameter of the uplink transmission / downlink transmission, and the first parameter includes one or more of the following: bandwidth, subcarrier spacing, and modulation and coding scheme (MCS).

[0006] It can be seen that based on the method described in the first aspect, whether uplink transmission / downlink transmission uses the relevant modulation method of DAPSK or DPSK can be determined based on the bandwidth, subcarrier spacing, and MCS. That is, whether uplink transmission / downlink transmission uses the relevant modulation method of DAPSK or DPSK can be determined based on the actual communication situation. Uplink transmission / downlink transmission does not always use the relevant modulation method of DAPSK or DPSK. This can make the use of the relevant modulation method of DAPSK or DPSK more flexible, which is conducive to improving the transmission performance of the communication system.

[0007] In a possible embodiment, when the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

[0008] When the bandwidth is relatively small, after signal processing, the signal bandwidth ranges from 0 to BW, and the phase noise bandwidth ranges from 0 to BW. Therefore, the smaller the bandwidth, the fewer high-frequency components of the phase noise, and the smaller the time-domain fluctuation of the phase noise. As a result, the fluctuation between the phase noise of two adjacent time-domain symbols is smaller, the error in time-domain correlation modulation processing is smaller, and the performance is better. When the number of subcarriers is small, the bandwidth for the same number of RBs is also smaller, thus improving the performance. When the MCS is greater than the MCS threshold, the signal-to-noise ratio required for demodulation is relatively high, the noise level is relatively low, and the impact of noise on phase noise is relatively small. Therefore, the fluctuation of phase noise is also smaller, the fluctuation between the phase noise of two adjacent time-domain symbols is smaller, and the error in time-domain correlation modulation processing is smaller, improving the performance.

[0009] In a possible embodiment, the protocol predefines: when the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

[0010] Predefining this communication method through the protocol helps save signaling overhead.

[0011] In a possible embodiment, the method further includes: receiving configuration information sent by the access network device, where the configuration information is used to configure: when the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

[0012] This communication mode can be configured flexibly according to actual conditions by configuring the access network device.

[0013] In a possible embodiment, the configuration information is carried in DCI signaling, RRC signaling, or MAC-CE signaling.

[0014] In a possible embodiment, the method further includes: sending first indication information to the access network device, where the first indication information is used to indicate that: when the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

[0015] This communication method of reporting through the terminal is conducive to meeting the communication needs of the terminal.

[0016] In a possible embodiment, the method further includes: sending second indication information to the access network device, the second indication information being used to indicate whether the terminal supports a related modulation method of DAPSK or DPSK; wherein, whether the downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK is related to the first parameter of the downlink transmission and the second indication information.

[0017] By reporting whether the terminal supports the relevant modulation mode of DAPSK or DPSK, the access network equipment can more reasonably determine whether to use the relevant modulation mode of DAPSK or DPSK.

[0018] In a possible embodiment, the bandwidth threshold is determined based on the subcarrier spacing of uplink transmission / downlink transmission and / or the MCS of uplink transmission / downlink transmission.

[0019] The coordination of these two parameters can achieve better performance and save signaling overhead for signaling the bandwidth threshold.

[0020] In a possible embodiment, the bandwidth threshold is one of the following bandwidths: 6 RBs, 8 RBs, 10 RBs, 12 RBs, 14 RBs, 16 RBs, 18 RBs, and 20 RBs.

[0021] In a possible embodiment, the subcarrier spacing threshold is one of the following subcarrier spacings: 120 KHz, 240 KHz, or 480 KHz.

[0022] In a second aspect, the present application provides a communication method, which can be executed by an access network device, or by a module (such as a processor, chip, or chip system) applied to the access network device, or by a logical node, logical module, or software that can implement all or part of the functions of the access network device. In this communication method, uplink / downlink transmission is performed with a terminal; whether the uplink / downlink transmission between the access network device and the terminal uses a modulation method related to differential amplitude phase shift keying (DAPSK) or differential phase shift keying (DPSK) is related to a first parameter of the uplink / downlink transmission, and the first parameter includes one or more of the following: bandwidth, subcarrier spacing, and modulation and coding scheme (MCS).

[0023] In a possible embodiment, when the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

[0024] In a possible embodiment, the protocol predefines: when the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

[0025] In a possible embodiment, the method further includes: receiving configuration information sent by the access network device, where the configuration information is used to configure: when the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

[0026] In a possible embodiment, the configuration information is carried in DCI signaling, RRC signaling, or MAC-CE signaling.

[0027] In a possible embodiment, the method further includes: receiving first indication information sent by the terminal, where the first indication information is used to indicate that when the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

[0028] In a possible embodiment, the method further includes: receiving second indication information sent by the terminal, the second indication information being used to indicate whether the terminal supports a related modulation method of DAPSK or DPSK; wherein, whether the downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK is related to the first parameter of the downlink transmission and the second indication information.

[0029] In a possible embodiment, the bandwidth threshold is determined based on the subcarrier spacing of uplink transmission / downlink transmission and / or the MCS of uplink transmission / downlink transmission.

[0030] In a possible embodiment, the bandwidth threshold is one of the following bandwidths: 6 RBs, 8 RBs, 10 RBs, 12 RBs, 14 RBs, 16 RBs, 18 RBs, and 20 RBs.

[0031] In a possible embodiment, the subcarrier spacing threshold is one of the following subcarrier spacings: 120 KHz, 240 KHz, or 480 KHz.

[0032] The beneficial effects of the second aspect can be referred to the beneficial effects of the first aspect, and will not be repeated here.

[0033] In a third aspect, the present application provides a communication device, which may be, for example, a terminal or a module applied to a terminal, such as a processor, chip, or chip system, or a logical node, logic module, or software capable of implementing all or part of the terminal's functions. The communication device includes a module / unit for executing any method of the first aspect and its possible implementations.

[0034] In a fourth aspect, the present application provides a communication device. For example, the communication device may be an access network device or a module applied to the access network device, such as a processor, chip, or chip system. It may also be a logical node, logical module, or software that can implement all or part of the functions of the access network device. The communication device includes a module / unit for performing any method of the second aspect and its possible implementations.

[0035] In a fifth aspect, the present application provides a communication device, comprising a processor, wherein the processor is coupled to a memory, and the memory is used to store programs or instructions. When the program or instructions are executed by the processor, the device executes the method described in the first or second aspect above.

[0036] In a sixth aspect, the present application provides a chip comprising a processor and an interface, wherein the processor and the interface are coupled; the interface is used to receive or output signals, and the processor is used to execute code instructions, so that the chip executes the method described in the first or second aspect above.

[0037] In the seventh aspect, the present application provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called, the method described in the first aspect is executed, or the method described in the second aspect is executed.

[0038] In an eighth aspect, the present application provides a computer program product, comprising: a computer program code, wherein when the computer program code is executed, the method described in the first aspect is executed, or the method described in the second aspect is executed.

[0039] In a ninth aspect, the present application provides a communication system, which includes a communication device (such as a terminal) for executing the method described in the first aspect and a communication device (such as an access network device) for executing the method described in the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] FIG1 is a possible, non-limiting schematic diagram of a system provided by the present application;

[0041] FIG2 is a schematic diagram of a data transmission process based on DFTs-OFDM technology provided by the present application;

[0042] FIG3 is a schematic diagram of a data transmission process based on a correlation modulation technique provided by the present application;

[0043] FIG4 is a flow chart of a communication method provided by the present application;

[0044] FIG5 is a schematic structural diagram of a communication device provided by the present application;

[0045] FIG6 is a schematic structural diagram of another communication device provided in this application. DETAILED DESCRIPTION

[0046] The specific embodiments of the present application are further described in detail below with reference to the accompanying drawings.

[0047] The terms "first" and "second" and the like in the specification, claims, and drawings of this application are used to distinguish between different objects, not to describe a particular order. Furthermore, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0048] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0049] In this application, "at least one (item)" refers to one or more, "more than one" refers to two or more, "at least two (items)" refers to two or three and more than three, and "and / or" is used to describe the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0050] In this application, "sending information" can be understood as one device sending information to another device, or as one logical module within a device sending information to another logical module. For example, "an access network device sending information" can be understood as an access network device sending information to another device (such as a terminal), or as logical module 1 within an access network device sending information to logical module 2 within the access network device.

[0051] In this application, "receiving information" can be understood as one device receiving information from another device, or as a logical module within a device receiving information from another logical module. For example, "an access network device receiving information" can be understood as the access network device receiving information from another device (such as a terminal), or as logical module 1 within the access network device receiving information from logical module 2 within the access network device.

[0052] In this application, "sending information to... (e.g., a terminal)" or the related illustrations in the accompanying drawings can be understood as the destination end of the information being the terminal. This can include sending information to the terminal directly or indirectly. "Receiving information from... (e.g., a terminal)" or "receiving information from... (e.g., a terminal)" or "receiving information sent by (e.g., a terminal)", or the related illustrations in the accompanying drawings can be understood as the source end of the information being the terminal, which can include receiving information from the terminal directly or indirectly. The information may be processed as necessary between the source end and the destination end of the information transmission, such as format changes, etc., but the destination end can understand the valid information from the source end. Similar expressions in this application can be understood similarly and will not be repeated here.

[0053] To better understand the embodiments of the present application, the following first introduces the system architecture involved in the embodiments of the present application:

[0054] The embodiments of the present application can be applied to communication systems evolved after 5G, such as long term evolution (LTE) systems, fifth generation mobile communication (5G) systems, sixth generation mobile communication (6G) systems, satellite communications, and short-range wireless communication systems. Among them, the wireless communication systems mentioned in the embodiments of the present application include but are not limited to: three major application scenarios of 5G / 6G mobile communication systems: enhanced mobile broadband (eMBB), ultra reliable low latency communication (URLLC) and massive machine type communication (mMTC), long range Internet of Things (LoRa) systems or vehicle networking systems. The wireless communication system may include one or more access network devices, and one or more terminal devices.

[0055] Figure 1 shows a possible, non-limiting system diagram. As shown in Figure 1 , communication system 10 includes a radio access network (RAN) 100, a core network (CN) 200, and the Internet 300. RAN 100 includes at least one RAN node (e.g., 110a and 110b in Figure 1 , collectively referred to as 110) and at least one terminal (e.g., 120a-120j in Figure 1 , collectively referred to as 120). RAN 100 may also include other RAN nodes, such as wireless relay equipment and / or wireless backhaul equipment (not shown in Figure 1 ). Terminal 120 is wirelessly connected to RAN node 110. RAN node 110 is wirelessly or wiredly connected to core network 200. The core network equipment in core network 200 and RAN node 110 in RAN 100 may be separate physical devices, or they may be the same physical device that integrates core network logical functions and radio access network logical functions.

[0056] The RAN 100 may be a cellular system related to the Third Generation Partnership Project (3GPP), such as a 4G or 5G mobile communication system, or a future-oriented evolutionary system (such as a 6G mobile communication system). The RAN 100 may also be an open access network (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (WiFi) system. The RAN 100 may also be a communication system that integrates two or more of the above systems.

[0057] 1.RAN node 110

[0058] RAN node 110, sometimes also referred to as access network equipment, RAN entity, or access node, constitutes part of the communication system and facilitates wireless access for terminals. Multiple RAN nodes 110 in the communication system 10 can be of the same type or different types. In some scenarios, the roles of RAN node 110 and terminal 120 are relative. For example, network element 120i in Figure 1 can be a helicopter or drone, which can be configured as a mobile base station. For terminal 120j accessing RAN 100 via network element 120i, network element 120i is a base station; however, for base station 110a, network element 120i is a terminal. RAN node 110 and terminal 120 are sometimes referred to as communication devices. For example, network elements 110a and 110b in Figure 1 can be understood as communication devices with base station functionality, and network elements 120a-120j can be understood as communication devices with terminal functionality.

[0059] In one possible scenario, the RAN node 110 may be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next-generation NodeB (gNB), a next-generation base station in a sixth-generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. The RAN node 110 may be a macro base station (such as 110a in FIG. 1 ), a micro base station or an indoor station (such as 110b in FIG. 1 ), a relay node or a donor node, or a wireless controller in a CRAN scenario. In one possible embodiment, the RAN node 110 may also be a server, a wearable device, a vehicle, or an onboard device. For example, the access network device in vehicle-to-everything (V2X) technology may be a roadside unit (RSU). All or part of the functionality of the RAN node 110 in this application may also be implemented via software functions running on hardware, or via virtualized functions instantiated on a platform (such as a cloud platform). The RAN node 110 in this application may also be a logical node, a logical module or software that can implement all or part of the functions of the RAN node 110.

[0060] In another possible scenario, multiple RAN nodes 110 collaborate to assist the terminal in achieving wireless access, and different RAN nodes 110 respectively implement part of the functions of the base station. For example, the RAN node 110 can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU can be set separately or included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0061] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called O-CU (Open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, this application uses CU, CU-CP, CU-UP, DU and RU as examples for description. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0062] In the embodiments of the present application, the form of the RAN node 110 is not limited. The device used to implement the functions of the RAN node 110 can be the RAN node 110, or it can be a device that supports the RAN node 110 in implementing the functions, such as a chip system. The device can be installed in the RAN node 110 or used in conjunction with the RAN node 110.

[0063] For ease of description, the RAN node 110 will be referred to as an access network device in the following description.

[0064] 2. Terminal

[0065] Terminals can also be referred to as terminal devices, user equipment (UE), mobile stations, or mobile terminals. They can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), the Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, and smart cities. Terminals can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, and smart home appliances.

[0066] In the embodiments of the present application, the form of the terminal is not limited. The device for implementing the function of the terminal can be a terminal; it can also be a device that can support the terminal to implement the function, such as a chip system. The device can be installed in the terminal or used in conjunction with the terminal.

[0067] In order to facilitate the understanding of the content of this solution, some of the terms involved in the embodiments of this application are explained below to facilitate understanding by those skilled in the art. This part is only for ease of understanding and cannot be regarded as a disclosure or specific limitation of the technical solution of this application.

[0068] 1. Cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) signal

[0069] The CP-OFDM signal is a transmission signal obtained by mapping the modulated modulation symbols to the frequency domain subcarriers, then performing an inverse Fourier transform on them to convert the frequency domain signal into a time domain signal, and then adding a cyclic prefix to the time domain signal.

[0070] 2. Discrete Fourier transform spreading OFDM (DFTs-OFDM)

[0071] DFTs-OFDM has an additional DFT (Discrete Fourier Transform) process before the traditional OFDM process, so DFTs-OFDM is also called linear precoding OFDM technology.

[0072] For example, as shown in Figure 2, the data transmission process based on DFTs-OFDM technology is as follows: After encoding, the N-point modulated data undergoes serial-to-parallel conversion (S-to-P) to become N-point parallel modulated data. The N-point parallel modulated data undergoes N-point DFT processing to convert it into frequency domain data. The frequency domain data is mapped to M-point frequency domain subcarriers (subcarrier mapping), and then an M-point IDFT transform is performed to convert the frequency domain signal into a time domain signal. The time domain signal is then parallel-to-serial converted (p-to-s). A cyclic prefix (CP) is then added to the converted time domain signal, or power switching (PS) is performed, to obtain the DFTs-OFDM signal. Finally, the DFTs-OFDM signal is converted by a digital-to-analog converter (DAC) and a radio frequency module before being transmitted through the antenna.

[0073] After the transmitted signal passes through the wireless channel, it is received by the receiving antenna. The signal received by the receiving antenna is processed by the RF module and analog-to-digital converter, and then undergoes CP removal, serial-to-parallel conversion, DFT transformation, demapping, IDFT transformation, and parallel-to-serial conversion to finally obtain the data sent by the transmitter.

[0074] 3. Correlated modulation

[0075] Due to its abundant frequency band resources, high frequency has become a hotspot for research and development in the industry to address the growing demand for communications. Its notable features include large bandwidth and highly integrated antenna arrays to achieve high throughput. However, high frequency also includes phase noise (PHN). High phase noise can affect the demodulation performance of the modulated signal, resulting in performance degradation or even inoperability of high-frequency communication systems. In order to reduce the impact of phase noise on the performance of the communication system, a data transmission process based on correlation modulation technology has been proposed. The data transmission process based on correlation modulation technology is not much different from the data transmission process based on DFTs-OFDM. The data transmission process based on correlation modulation technology adds a step of correlation modulation after the modulation process and before the serial-to-parallel conversion process. For example, the flow diagram of data transmission based on correlation modulation technology is shown in Figure 3.

[0076] One modulation type of related modulation technology is differential modulation. For example, related modulation methods may include differential phase shift keying (DPSK) and differential amplitude phase shift keying (DAPSK). Among them, DPSK is a differential modulation based on phase shift keying (PSK) modulation, and the PSK modulation method includes binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), 8PSK or 16PSK. DAPSK is a differential modulation based on quadrature amplitude modulation (QAM), and the QAM method includes at least one of QPSK, 16QAM, 32QAM, and 64QAM. In other words, DPSK refers to differential modulation performed after modulation processing is performed using the PSK modulation method. DAPSK refers to differential modulation performed after modulation processing is performed using the QAM method.

[0077] The following is a further introduction to the communication method and communication device in conjunction with the accompanying drawings. It is understandable that the present application uses the access network device and the terminal as examples to illustrate the execution subjects of the interaction diagram, but the present application does not limit the execution subjects of the interaction diagram. For example, the access network device in the method provided by the present application may also be a chip, chip system, or processor applied to the access network device, or a logical node, logical module, or software that can implement all or part of the access network device; the terminal in the method provided by the present application may also be a chip, chip system, or processor applied to the terminal, or a logical node, logical module, or software that can implement all or part of the terminal functions.

[0078] Please refer to FIG4 , which is a flow chart of a communication method provided in an embodiment of the present application, wherein:

[0079] 401. The terminal performs uplink / downlink transmission with the access network device. Whether the uplink / downlink transmission between the access network device and the terminal uses a modulation scheme related to DAPSK or DPSK is related to a first parameter of the uplink / downlink transmission, which includes one or more of the following: bandwidth, subcarrier spacing, and modulation and coding scheme (MCS).

[0080] For example, taking uplink transmission as an example, the terminal may determine, based on the first parameter of the uplink transmission, whether the uplink transmission uses a modulation scheme related to DAPSK or DPSK. If it is determined that the uplink transmission uses a modulation scheme related to DAPSK or DPSK, the terminal uses the modulation scheme related to DAPSK or DPSK for uplink transmission with the access network device. If it is determined that the uplink transmission does not use a modulation scheme related to DAPSK or DPSK, the terminal does not use the modulation scheme related to DAPSK or DPSK for uplink transmission with the access network device.

[0081] Accordingly, the access network device can determine whether the uplink transmission uses the relevant modulation method of DAPSK or DPSK based on the first parameter of the uplink transmission. If it is determined that the uplink transmission uses the relevant modulation method of DAPSK or DPSK, the access network device uses the decorrelation modulation method corresponding to the relevant modulation method of DAPSK or DPSK to perform uplink transmission with the terminal. If it is determined that the uplink transmission does not use the relevant modulation method of DAPSK or DPSK, the access network device does not use the decorrelation modulation method corresponding to the relevant modulation method of DAPSK or DPSK to perform uplink transmission with the terminal. That is to say, in the case of uplink transmission, the access network device also needs to know whether the uplink transmission uses the relevant modulation method of DAPSK or DPSK, so as to decide whether to use the decorrelation modulation method corresponding to the relevant modulation method of DAPSK or DPSK to demodulate the signal.

[0082] For another example, taking downlink transmission as an example, the access network device may determine, based on the first parameter of the downlink transmission, whether the downlink transmission uses a modulation scheme related to DAPSK or DPSK. If it is determined that the downlink transmission uses a modulation scheme related to DAPSK or DPSK, the access network device uses the modulation scheme related to DAPSK or DPSK for downlink transmission with the terminal. If it is determined that the downlink transmission does not use a modulation scheme related to DAPSK or DPSK, the access network device does not use the modulation scheme related to DAPSK or DPSK for downlink transmission with the terminal.

[0083] Accordingly, the terminal can determine whether the downlink transmission uses the related modulation method of DAPSK or DPSK based on the first parameter of the downlink transmission. If it is determined that the downlink transmission uses the related modulation method of DAPSK or DPSK, the terminal uses the decorrelation modulation method corresponding to the related modulation method of DAPSK or DPSK to perform downlink transmission with the access network device. If it is determined that the downlink transmission does not use the related modulation method of DAPSK or DPSK, the terminal does not use the decorrelation modulation method corresponding to the related modulation method of DAPSK or DPSK to perform downlink transmission with the access network device. In other words, in the case of downlink transmission, the terminal also needs to know whether the downlink transmission uses the related modulation method of DAPSK or DPSK, so as to decide whether to use the decorrelation modulation method corresponding to the related modulation method of DAPSK or DPSK to demodulate the signal.

[0084] Optionally, the uplink transmission may be the transmission of a PUCCH or a PUSCH, etc. The downlink transmission may be the transmission of a PDCCH or a PDSCH, etc.

[0085] In a possible embodiment, when the bandwidth of uplink transmission / downlink transmission is less than the bandwidth threshold, and / or the subcarrier spacing of uplink transmission / downlink transmission is less than the subcarrier spacing threshold, and / or the MCS of uplink transmission / downlink transmission is greater than the MCS threshold, the uplink transmission / downlink transmission uses a related modulation mode of DAPSK or DPSK.

[0086] When the bandwidth is relatively small, after signal processing, the signal bandwidth ranges from 0 to BW, and the phase noise bandwidth ranges from 0 to BW. Therefore, the smaller the bandwidth, the fewer high-frequency components of the phase noise, and the smaller the time-domain fluctuation of the phase noise. As a result, the fluctuation between the phase noise of two adjacent time-domain symbols is smaller, the error in time-domain correlation modulation processing is smaller, and the performance is better. When the number of subcarriers is small, the bandwidth for the same number of RBs is also smaller, thus improving the performance. When the MCS is greater than the MCS threshold, the signal-to-noise ratio required for demodulation is relatively high, the noise level is relatively low, and the impact of noise on phase noise is relatively small. Therefore, the fluctuation of phase noise is also smaller, the fluctuation between the phase noise of two adjacent time-domain symbols is smaller, and the error in time-domain correlation modulation processing is smaller, improving the performance.

[0087] For example, when the bandwidth of uplink / downlink transmission is less than the bandwidth threshold, the uplink / downlink transmission uses the DAPSK or DPSK modulation scheme. When the bandwidth of uplink / downlink transmission is greater than the bandwidth threshold, the uplink / downlink transmission does not use the DAPSK or DPSK modulation scheme.

[0088] For example, when the subcarrier spacing of uplink / downlink transmission is less than the subcarrier spacing threshold, the uplink / downlink transmission uses the relevant modulation scheme of DAPSK or DPSK. When the subcarrier spacing of uplink / downlink transmission is greater than the subcarrier spacing threshold, the uplink / downlink transmission does not use the relevant modulation scheme of DAPSK or DPSK.

[0089] For example, when the MCS of uplink / downlink transmission is greater than the MCS threshold, the uplink / downlink transmission uses the relevant modulation mode of DAPSK or DPSK. When the MCS of uplink / downlink transmission is less than the MCS threshold, the uplink / downlink transmission does not use the relevant modulation mode of DAPSK or DPSK.

[0090] For another example, when the bandwidth of uplink / downlink transmission is less than the bandwidth threshold and the subcarrier spacing is less than the subcarrier spacing threshold, the uplink / downlink transmission uses the relevant modulation scheme of DAPSK or DPSK. When the bandwidth of uplink / downlink transmission is greater than the bandwidth threshold and / or the subcarrier spacing is greater than the subcarrier spacing threshold, the uplink / downlink transmission does not use the relevant modulation scheme of DAPSK or DPSK.

[0091] For another example, when the bandwidth of uplink / downlink transmission is less than the bandwidth threshold and the MCS is greater than the MCS threshold, the uplink / downlink transmission uses the relevant modulation scheme of DAPSK or DPSK. When the bandwidth of uplink / downlink transmission is greater than the bandwidth threshold and / or the MCS is less than the MCS threshold, the uplink / downlink transmission does not use the relevant modulation scheme of DAPSK or DPSK.

[0092] For another example, when the subcarrier spacing for uplink / downlink transmission is less than the subcarrier spacing threshold and the MCS is greater than the MCS threshold, the uplink / downlink transmission uses the relevant modulation schemes of DAPSK or DPSK. When the subcarrier spacing for uplink / downlink transmission is greater than the subcarrier spacing threshold and / or the MCS is less than the MCS threshold, the uplink / downlink transmission does not use the relevant modulation schemes of DAPSK or DPSK.

[0093] For another example, when the bandwidth of uplink / downlink transmission is less than the bandwidth threshold, the subcarrier spacing is less than the subcarrier spacing threshold, and the MCS is greater than the MCS threshold, the uplink / downlink transmission uses the relevant modulation schemes of DAPSK or DPSK. When the bandwidth of uplink / downlink transmission is greater than the bandwidth threshold and / or the subcarrier spacing is greater than the subcarrier spacing threshold and / or the MCS is less than the MCS threshold, the uplink / downlink transmission does not use the relevant modulation schemes of DAPSK or DPSK.

[0094] In a possible embodiment, when the bandwidth of uplink transmission / downlink transmission is less than or equal to the bandwidth threshold, and / or the subcarrier spacing of uplink transmission / downlink transmission is less than or equal to the subcarrier spacing threshold, and / or the MCS of uplink transmission / downlink transmission is greater than or equal to the MCS threshold, the uplink transmission / downlink transmission uses a related modulation mode of DAPSK or DPSK.

[0095] In a possible embodiment, the protocol predefines: when the bandwidth of uplink transmission / downlink transmission is less than the bandwidth threshold, and / or the subcarrier spacing of uplink transmission / downlink transmission is less than the subcarrier spacing threshold, and / or the MCS of uplink transmission / downlink transmission is greater than the MCS threshold, the uplink transmission / downlink transmission uses the related modulation mode of DAPSK or DPSK.

[0096] In other words, the protocol can predefine this communication method, which helps save signaling overhead.

[0097] In another possible embodiment, the access network device may send configuration information to the terminal. This configuration information is used to configure: when the bandwidth of uplink / downlink transmission is less than a bandwidth threshold, and / or the subcarrier spacing of uplink / downlink transmission is less than a subcarrier spacing threshold, and / or the MCS of uplink / downlink transmission is greater than an MCS threshold, uplink / downlink transmission uses the relevant modulation scheme of DAPSK or DPSK. Accordingly, the terminal may also receive this configuration information sent by the access network device. Optionally, this configuration information is carried in DCI signaling, RRC signaling, or MAC-CE signaling.

[0098] In other words, the access network device can be configured with this communication mode. By configuring this communication mode on the access network device, this communication mode can be flexibly configured according to actual conditions.

[0099] In another possible embodiment, the terminal may further send first indication information to the access network device, where the first indication information is used to indicate that when the bandwidth of the uplink / downlink transmission is less than a bandwidth threshold, and / or the subcarrier spacing of the uplink / downlink transmission is less than a subcarrier spacing threshold, and / or the MCS of the uplink / downlink transmission is greater than an MCS threshold, the uplink / downlink transmission uses a related modulation scheme of DAPSK or DPSK. Accordingly, the access network device may receive the first indication information. Optionally, the first indication information may be carried in the PUCCH or the PUSCH.

[0100] In other words, the terminal can report this communication mode to the access network device. By reporting this communication mode to the terminal, the access network device and the terminal can cooperate to obtain the phase noise level and channel performance of both parties, which can improve performance.

[0101] In one possible embodiment, the bandwidth threshold may be predefined by a protocol. Alternatively, the bandwidth threshold may be configured by the access network device. For example, the bandwidth threshold may be configured by the access network device through RRC signaling, MAC-CE signaling, or DCI signaling. Alternatively, the terminal may report the bandwidth threshold to the access network device. For example, the terminal may report the bandwidth threshold to the access network device via the PUCCH or PDCCH.

[0102] In one possible embodiment, the subcarrier spacing threshold may be predefined by a protocol. Alternatively, the subcarrier spacing threshold may be configured by an access network device. For example, the subcarrier spacing threshold may be configured by the access network device through RRC signaling, MAC-CE signaling, or DCI signaling. Alternatively, the terminal may report the subcarrier spacing threshold to the access network device. For example, the terminal may report the subcarrier spacing threshold to the access network device via the PUCCH or PDCCH.

[0103] In one possible embodiment, the MCS threshold may be predefined by a protocol. Alternatively, the MCS threshold may be configured by the access network device. For example, the MCS threshold may be configured by the access network device through RRC signaling, MAC-CE signaling, or DCI signaling. Alternatively, the terminal may report the MCS threshold to the access network device. For example, the terminal may report the MCS threshold to the access network device via the PUCCH or PDCCH.

[0104] In one possible embodiment, the bandwidth threshold is determined based on the uplink / downlink subcarrier spacing and / or the uplink / downlink MCS. The combination of these two parameters can achieve better performance and reduce the signaling overhead of notifying the bandwidth threshold.

[0105] For example, there is a corresponding relationship between the bandwidth threshold and the uplink / downlink transmission subcarrier spacing and / or the uplink / downlink MCS. Based on the uplink / downlink transmission subcarrier spacing and / or the uplink / downlink MCS, the corresponding bandwidth threshold can be determined.

[0106] For example, the correspondence between the bandwidth threshold and the subcarrier spacing for uplink / downlink transmission is shown in Table 1 below. If the subcarrier spacing for uplink / downlink transmission is 120 kHz, the bandwidth threshold is BW1. If the subcarrier spacing for uplink / downlink transmission is 240 kHz, the bandwidth threshold is BW2. If the subcarrier spacing for uplink / downlink transmission is 480 kHz, the bandwidth threshold is BW3.

[0107] Table 1

[0108] For another example, the correspondence between the bandwidth threshold and the MCS for uplink / downlink transmission is shown in Table 2 below. If the MCS for uplink / downlink transmission is MCS1, the bandwidth threshold is BW1. If the MCS for uplink / downlink transmission is MCS2, the bandwidth threshold is BW2. If the MCS for uplink / downlink transmission is MCS3, the bandwidth threshold is BW3.

[0109] Table 2

[0110] Optionally, the correspondence between the bandwidth threshold and the subcarrier spacing of uplink transmission / downlink transmission and / or the MCS of uplink transmission / downlink transmission may be pre-defined by the protocol or configured by the access network device. For example, the correspondence between the bandwidth threshold and the subcarrier spacing of uplink transmission / downlink transmission and / or the MCS of uplink transmission / downlink transmission may be configured by the access network device through RRC signaling or MAC-CE signaling or DCI signaling. Optionally, the access network device may configure the correspondence between the bandwidth threshold and the subcarrier spacing of uplink transmission / downlink transmission and / or the MCS of uplink transmission / downlink transmission to the terminal through RRC signaling, and then indicate the bandwidth, subcarrier spacing and MCS of uplink transmission / downlink transmission through DCI signaling.

[0111] In a possible embodiment, the MCS threshold is determined based on the subcarrier spacing of uplink transmission / downlink transmission. The combination of these two parameters can achieve better performance and save signaling overhead for signaling the bandwidth threshold.

[0112] For example, there is a corresponding relationship between the MCS threshold and the subcarrier spacing of uplink transmission / downlink transmission. Based on the subcarrier spacing of uplink transmission / downlink transmission, the corresponding MCS threshold can be determined.

[0113] For example, the correspondence between the MCS threshold and the subcarrier spacing for uplink / downlink transmission is shown in Table 3 below. If the subcarrier spacing for uplink / downlink transmission is 120 kHz, the MCS threshold is MCS1. If the subcarrier spacing for uplink / downlink transmission is 240 kHz, the MCS threshold is MCS2. If the subcarrier spacing for uplink / downlink transmission is 480 kHz, the MCS threshold is MCS3.

[0114] Table 3

[0115] Optionally, the correspondence between the MCS threshold and the subcarrier spacing for uplink transmission / downlink transmission may be predefined by the protocol or configured by the access network device. For example, the correspondence between the MCS threshold and the subcarrier spacing for uplink transmission / downlink transmission may be configured by the access network device through RRC signaling, MAC-CE signaling, or DCI signaling. Optionally, the access network device may configure the correspondence between the MCS threshold and the subcarrier spacing for uplink transmission / downlink transmission to the terminal through RRC signaling, and then indicate the bandwidth, subcarrier spacing, and MCS for uplink transmission / downlink transmission through DCI signaling.

[0116] In a possible embodiment, the bandwidth threshold is one of the following bandwidths: 6 RBs, 8 RBs, 10 RBs, 12 RBs, 14 RBs, 16 RBs, 18 RBs, and 20 RBs.

[0117] In a possible embodiment, the subcarrier spacing threshold is one of the following subcarrier spacings: 120 KHz, 240 KHz, or 480 KHz.

[0118] In a possible embodiment, the MCS includes at least one of a modulation mode and a code rate, or the MCS is an index value obtained according to the modulation mode and the code rate, or the MCS is a spectrum efficiency obtained according to the modulation mode and the code rate.

[0119] In a possible embodiment, the modulation mode of the MCS threshold may be any one of 16QAM, 32QAM, and 64QAM, or the modulation mode of the MCS threshold may be any one of 8PSK, 16PSK, 32PSK, and 64PSK.

[0120] In one possible embodiment, the terminal may further send second indication information to the access network device, where the second indication information is used to indicate whether the terminal supports DAPSK or DPSK modulation. Accordingly, the access network device may receive the second indication information. Whether the downlink transmission between the access network device and the terminal uses DAPSK or DPSK modulation is related to the first parameter of the downlink transmission and the second indication information.

[0121] If the second indication information indicates that the terminal supports the relevant modulation mode of DAPSK or DPSK, whether the downlink transmission between the access network device and the terminal uses the relevant modulation mode of DAPSK or DPSK is related to the first parameter of the downlink transmission.

[0122] If the second indication information indicates that the terminal does not support the relevant modulation mode of DAPSK or DPSK, the downlink transmission between the access network device and the terminal does not use the relevant modulation mode of DAPSK or DPSK.

[0123] That is, on the access network device side, if the second indication information indicates that the terminal supports the relevant modulation mode of DAPSK or DPSK, the access network device may determine whether the downlink transmission between the access network device and the terminal uses the relevant modulation mode of DAPSK or DPSK based on the first parameter of the downlink transmission. If the second indication information indicates that the terminal does not support the relevant modulation mode of DAPSK or DPSK, the access network device determines that the downlink transmission between the access network device and the terminal does not use the relevant modulation mode of DAPSK or DPSK.

[0124] Similarly, on the terminal side, if the second indication information indicates that the terminal supports the relevant modulation mode of DAPSK or DPSK, the terminal may determine whether the downlink transmission between the access network device and the terminal uses the relevant modulation mode of DAPSK or DPSK based on the first parameter of the downlink transmission. If the second indication information indicates that the terminal does not support the relevant modulation mode of DAPSK or DPSK, the terminal determines that the downlink transmission between the access network device and the terminal does not use the relevant modulation mode of DAPSK or DPSK.

[0125] By reporting whether the terminal supports the relevant modulation mode of DAPSK or DPSK, the access network equipment can more reasonably determine whether to use the relevant modulation mode of DAPSK or DPSK.

[0126] As can be seen, based on the method described in Figure 4, whether uplink / downlink transmission uses the relevant modulation method of DAPSK or DPSK can be determined based on the bandwidth, subcarrier spacing, and MCS. In other words, whether uplink / downlink transmission uses the relevant modulation method of DAPSK or DPSK can be determined based on the actual communication situation. Uplink / downlink transmission does not always use the relevant modulation method of DAPSK or DPSK. This can make the use of the relevant modulation method of DAPSK or DPSK more flexible, which is conducive to improving the transmission performance of the communication system.

[0127] The present application provides a communication device that can be used to implement the functions of the above-mentioned terminal or access network device. The communication device can be a terminal or an access network device. The communication device includes a module or unit that corresponds one-to-one to the method / operation / step / action performed by the terminal or access network device in the above-mentioned method embodiment. The unit can be a hardware circuit, or software, or a combination of a hardware circuit and software. Please refer to Figure 5, which shows a structural diagram of a communication device 500 of an embodiment of the present application. The communication device 500 may include an interface unit 501 and a processing unit 502. Specifically, the processing unit 502 is used to process signaling and / or data, and the signaling and / or data may be data received by the interface unit 501, and the processed signaling and / or data may also be sent by the interface unit 501;

[0128] In one embodiment, when the communication device 500 is a terminal, wherein:

[0129] Interface unit 501, used for uplink / downlink transmission with access network equipment;

[0130] Among them, whether the uplink transmission / downlink transmission between the access network equipment and the terminal uses the relevant modulation method of differential amplitude phase shift keying DAPSK or differential phase shift keying DPSK is related to the first parameter of the uplink transmission / downlink transmission, and the first parameter includes one or more of the following: bandwidth, subcarrier spacing, modulation and coding scheme MCS.

[0131] In a possible embodiment, when the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

[0132] In one possible embodiment, the protocol predefines:

[0133] When the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses the related modulation method of DAPSK or DPSK.

[0134] In a possible embodiment, the interface unit 501 is further used to receive configuration information sent by the access network device, where the configuration information is used to configure: when the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

[0135] In a possible embodiment, the configuration information is carried in DCI signaling, RRC signaling, or MAC-CE signaling.

[0136] In a possible embodiment, the interface unit 501 is further used to send first indication information to the access network device, where the first indication information is used to indicate that when the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

[0137] In a possible embodiment, the interface unit 501 is also used to send second indication information to the access network device, where the second indication information is used to indicate whether the terminal supports the relevant modulation method of DAPSK or DPSK; wherein, whether the downlink transmission between the access network device and the terminal uses the relevant modulation method of DAPSK or DPSK is related to the first parameter of the downlink transmission and the second indication information.

[0138] In a possible embodiment, the bandwidth threshold is determined based on the subcarrier spacing of uplink transmission / downlink transmission and / or the MCS of uplink transmission / downlink transmission.

[0139] In a possible embodiment, the bandwidth threshold is one of the following bandwidths: 6 RBs, 8 RBs, 10 RBs, 12 RBs, 14 RBs, 16 RBs, 18 RBs, and 20 RBs.

[0140] In a possible embodiment, the subcarrier spacing threshold is one of the following subcarrier spacings: 120 KHz, 240 KHz, or 480 KHz.

[0141] In one embodiment, when the communication device 500 is an access network device, wherein:

[0142] Interface unit 501, used for uplink / downlink transmission with the terminal;

[0143] Whether the uplink transmission / downlink transmission between the access network device and the terminal uses the related modulation method of differential amplitude phase shift keying DAPSK or differential phase shift keying DPSK is related to the first parameter of the uplink transmission / downlink transmission. The first parameter includes one or more of the following: bandwidth, subcarrier spacing, modulation and coding scheme MCS.

[0144] In a possible embodiment, when the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

[0145] In one possible embodiment, the protocol predefines:

[0146] When the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses the related modulation method of DAPSK or DPSK.

[0147] In a possible embodiment, the interface unit 501 is further used to receive configuration information sent by the access network device, where the configuration information is used to configure: when the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

[0148] In a possible embodiment, the configuration information is carried in DCI signaling, RRC signaling, or MAC-CE signaling.

[0149] In a possible embodiment, the interface unit 501 is further used to receive first indication information sent by the terminal, where the first indication information is used to indicate that when the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

[0150] In a possible embodiment, the interface unit 501 is further used to receive second indication information sent by the terminal, where the second indication information is used to indicate whether the terminal supports related modulation methods of DAPSK or DPSK; wherein, whether the downlink transmission between the access network device and the terminal uses related modulation methods of DAPSK or DPSK is related to the first parameter of the downlink transmission and the second indication information.

[0151] In a possible embodiment, the bandwidth threshold is determined based on the subcarrier spacing of uplink transmission / downlink transmission and / or the MCS of uplink transmission / downlink transmission.

[0152] In a possible embodiment, the bandwidth threshold is one of the following bandwidths: 6 RBs, 8 RBs, 10 RBs, 12 RBs, 14 RBs, 16 RBs, 18 RBs, and 20 RBs.

[0153] In a possible embodiment, the subcarrier spacing threshold is one of the following subcarrier spacings: 120 KHz, 240 KHz, or 480 KHz.

[0154] FIG6 shows a communication device 600 provided in an embodiment of the present application, configured to implement the functions of the aforementioned terminal or access network device. The device may be a communication device or a device used in a communication device. The communication device may be a terminal or access network device. The device used in the communication device may be a chip system or chip within the communication device. The chip system may consist of a chip alone or may include a chip and other discrete components.

[0155] The communication device 600 includes at least one processor 610 for implementing the processing functions of the device (e.g., access network device or terminal) in the method provided in the embodiment of the present application. The communication device 600 may also include a communication interface 620 for implementing the transceiver operation of the device (e.g., access network device or terminal) in the method provided in the embodiment of the present application. In the embodiment of the present application, the communication interface can be a transceiver, a circuit, a bus, a module, or other types of communication interfaces for communicating with other devices via a transmission medium. For example, the communication interface 620 is used for the device in the communication device 600 to communicate with other devices. The processor 610 uses the communication interface 620 to send and receive data and is used to implement the method described in the above method embodiment.

[0156] The communication device 600 may also include at least one memory 630 for storing program instructions and / or data. The memory 630 is coupled to the processor 610. Coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, which may be electrical, mechanical, or other forms, and is used for information exchange between the devices, units, or modules. The processor 610 may operate in conjunction with the memory 630. The processor 610 may execute program instructions stored in the memory 630. At least one of the at least one memory may be included in the processor.

[0157] The specific connection medium between the communication interface 620, processor 610, and memory 630 is not limited in the embodiments of the present application. In Figure 6, the memory 630, processor 610, and communication interface 620 are connected via a bus. The bus is represented by a bold line in Figure 6. The connection between other components is only for schematic illustration and is not intended to be limiting. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one bold line is used in Figure 6, but this does not mean that there is only one bus or one type of bus.

[0158] When the communication device 600 is specifically a device for a device (such as an access network device or a terminal), for example, when the communication device 600 is specifically a chip or a chip system, the communication interface 620 may output or receive a baseband signal. When the communication device 600 is specifically a device (such as an access network device or a terminal), the communication interface 620 may output or receive a radio frequency signal. In an embodiment of the present application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0159] It should be noted that the communication interface 620 may be used to execute the functions of the interface unit 501 , and the processor 610 may be used to execute the functions of the processing unit 502 , which will not be described in detail here.

[0160] When the above-mentioned communication device is a chip applied to a terminal, the terminal chip implements the functions of the terminal in the above-mentioned method embodiment, and the terminal chip receives information from other network elements; or, the terminal chip sends information to other network elements.

[0161] When the communication device is a chip used in an access network device, the access network device chip implements the functions of the access network device in the above method embodiment. The access network device chip receives information from other network elements; or the access network device chip sends information to other network elements.

[0162] It is understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0163] The method steps in the embodiments of the present application can be implemented by hardware or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, which can be stored in random access memory (RAM), flash memory, read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), registers, hard disks, mobile hard disks, CD-ROMs, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and storage medium can be located in an ASIC. In addition, the ASIC can be located in an access network device or a terminal. Of course, the processor and storage medium can also exist as discrete components in a terminal or access network device.

[0164] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is executed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program or instruction may be stored in a computer-readable storage medium or transmitted via the computer-readable storage medium. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a tape; it may also be an optical medium, such as a DVD; it may also be a semiconductor medium, such as a solid state disk (SSD).

[0165] In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0166] It is understood that the various numbers used in the embodiments of this application are merely for ease of description and are not intended to limit the scope of the embodiments of this application. The order of the sequence numbers of the above-mentioned processes does not necessarily imply a specific order of execution; the order of execution of the processes should be determined by their functions and inherent logic.

[0167] An embodiment of the present application further provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are executed, the method executed by the terminal or access network device in the above method embodiment is implemented.

[0168] An embodiment of the present application further provides a computer program product, which includes a computer program. When the computer program is executed, the method executed by the terminal or access network device in the above method embodiment is implemented.

[0169] The present application also provides a communication system including a terminal or an access network device, wherein the terminal is configured to execute the method executed by the terminal in the above method embodiment, and the access network device is configured to execute the method executed by the access network device in the above method embodiment.

[0170] It should be noted that for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by this application.

[0171] The descriptions of the various embodiments provided in this application can refer to each other. The descriptions of each embodiment have their own focus. For parts not described in detail in a particular embodiment, please refer to the relevant descriptions of other embodiments. For the convenience and brevity of description, for example, the functions and execution steps of the various devices and equipment provided in the embodiments of this application can refer to the relevant descriptions of the method embodiments of this application. The various method embodiments and the various device embodiments can also refer to, be combined with, or quote each other.

[0172] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A communication method, characterized in that: Applied to a terminal, the method comprises: Perform uplink / downlink transmission with access network equipment; Among them, whether the uplink transmission / downlink transmission between the access network device and the terminal uses the relevant modulation method of differential amplitude phase shift keying DAPSK or differential phase shift keying DPSK is related to the first parameter of the uplink transmission / downlink transmission, and the first parameter includes one or more of the following: bandwidth, subcarrier spacing, modulation and coding scheme MCS.

2. The method according to claim 1, characterized in that When the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

3. The method according to claim 2, characterized in that Protocol predefined: When the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

4. The method according to claim 2, characterized in that: The method further comprises: Receive configuration information sent by the access network device, where the configuration information is used to configure: When the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

5. The method according to claim 4, characterized in that The configuration information is carried in DCI signaling, RRC signaling, or MAC-CE signaling.

6. The method according to claim 2, characterized in that The method further comprises: Sending first indication information to the access network device, wherein the first indication information is used to indicate that when the bandwidth is less than a bandwidth threshold, and / or the subcarrier spacing is less than a subcarrier spacing threshold, and / or the MCS is greater than an MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

7. The method according to any one of claims 1 to 6, characterized in that: The method further comprises: Sending second indication information to the access network device, where the second indication information is used to indicate whether the terminal supports a modulation mode related to DAPSK or DPSK; Whether the downlink transmission between the access network device and the terminal uses a modulation method related to DAPSK or DPSK is related to the first parameter of the downlink transmission and the second indication information.

8. The method according to any one of claims 2 to 6, characterized in that: The bandwidth threshold is determined based on the subcarrier spacing of the uplink transmission / downlink transmission and / or the MCS of the uplink transmission / downlink transmission.

9. The method according to any one of claims 2 to 6, characterized in that: The bandwidth threshold is one of the following bandwidths: 6RBs, 8RBs, 10RBs, 12RBs, 14RBs, 16RBs, 18RBs, 20RBs.

10. The method according to any one of claims 2 to 6, characterized in that: The subcarrier spacing threshold is one of the following subcarrier spacings: 120 KHz, 240 KHz, or 480 KHz.

11. A communication method, characterized in that: Applied to access network equipment, the method comprises: Perform uplink / downlink transmission with the terminal; Whether the uplink transmission / downlink transmission between the access network device and the terminal uses the relevant modulation method of differential amplitude phase shift keying DAPSK or differential phase shift keying DPSK is related to the first parameter of the uplink transmission / downlink transmission, and the first parameter includes one or more of the following: bandwidth, subcarrier spacing, modulation and coding scheme MCS.

12. The method according to claim 11, characterized in that When the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

13. The method according to claim 12, characterized in that Protocol predefined: When the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

14. The method according to claim 12, characterized in that The method further comprises: Receive configuration information sent by the access network device, where the configuration information is used to configure: When the bandwidth is less than the bandwidth threshold, and / or the subcarrier spacing is less than the subcarrier spacing threshold, and / or the MCS is greater than the MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

15. The method according to claim 14, characterized in that The configuration information is carried in DCI signaling, RRC signaling, or MAC-CE signaling.

16. The method according to claim 12, characterized in that The method further comprises: Receive first indication information sent by the terminal, where the first indication information is used to indicate that when the bandwidth is less than a bandwidth threshold, and / or the subcarrier spacing is less than a subcarrier spacing threshold, and / or the MCS is greater than an MCS threshold, the uplink transmission / downlink transmission between the access network device and the terminal uses a related modulation method of DAPSK or DPSK.

17. The method according to any one of claims 11 to 16, characterized in that: The method further comprises: receiving second indication information sent by the terminal, where the second indication information is used to indicate whether the terminal supports a modulation mode related to DAPSK or DPSK; Whether the downlink transmission between the access network device and the terminal uses a modulation method related to DAPSK or DPSK is related to the first parameter of the downlink transmission and the second indication information.

18. The method according to any one of claims 12 to 16, characterized in that: The bandwidth threshold is determined based on the subcarrier spacing of the uplink transmission / downlink transmission and / or the MCS of the uplink transmission / downlink transmission.

19. The method according to any one of claims 12 to 16, characterized in that: The bandwidth threshold is one of the following bandwidths: 6RBs, 8RBs, 10RBs, 12RBs, 14RBs, 16RBs, 18RBs, 20RBs.

20. The method according to any one of claims 12 to 16, characterized in that: The subcarrier spacing threshold is one of the following subcarrier spacings: 120 KHz, 240 KHz, or 480 KHz.

21. A communication device, characterized in that: The method comprises a unit for executing the method according to any one of claims 1 to 10, or comprises a unit for executing the method according to any one of claims 10 to 20.

22. A communication device, characterized in that: The method comprises a processor and a memory, wherein the processor and the memory are coupled, and the processor is used to implement the method according to any one of claims 1 to 10, or the processor is used to implement the method according to any one of claims 10 to 20.

23. A chip, characterized in that: The invention comprises a processor and an interface, wherein the processor and the interface are coupled; the interface is used to receive or output signals, and the processor is used to execute code instructions so that the method described in any one of claims 1 to 10 is executed, or the method described in any one of claims 10 to 20 is executed.

24. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which, when called by the computer, enable the computer to execute the method described in any one of claims 1 to 10, or enable the computer to execute the method described in any one of claims 10 to 20.

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