Search

JP-7855785-B2 - Communication methods, communication devices, and communication systems

JP7855785B2JP 7855785 B2JP7855785 B2JP 7855785B2JP-7855785-B2

Inventors

  • ▲閔▼ ▲剣▼
  • 盛 先
  • ▲鐘▼ 文果
  • 曹 恒
  • 胡 世▲鵬▼

Assignees

  • 華為技術有限公司

Dates

Publication Date
20260508
Application Date
20230718
Priority Date
20220720

Claims (20)

  1. A communication method, wherein the method is applied to a first device, and the method is A step of transmitting a first signal to a second device, wherein the phase of the first signal is a first phase, A method comprising the steps of receiving a second signal from the second device, wherein the second signal and the first signal are two signals whose transmission directions are opposite in the first transmission line, the first signal and the second signal are signals that carry different data, the phase of the second signal is the second phase, and the first phase and the second phase are used to adjust the data signal of the first transmission line.
  2. The aforementioned method, The method according to claim 1, further comprising the step of transmitting phase information to the second device, wherein the phase information is determined based on the first phase and the second phase, and the phase information is used to adjust the data signal.
  3. The method according to claim 2, wherein the phase information indicates a measured phase difference, the measured phase difference is determined based on the first phase and the second phase, or the phase information indicates a fluctuating phase difference, the fluctuating phase difference is determined based on the measured phase difference and the reference phase difference.
  4. The method according to claim 3, wherein the reference phase difference is a reference phase difference for signal transmission in the first transmission line, or the reference phase difference is a reference phase difference for signal transmission in the second transmission line, and the second transmission line is a transmission line different from the first transmission line.
  5. The method according to claim 3, wherein the phase information indicates a corresponding value of the measured phase difference calculated at at least one frequency , or the phase information indicates a corresponding value of the fluctuating phase difference calculated at at least one frequency .
  6. The aforementioned method, The method according to claim 1, further comprising the step of adjusting the data signal based on the first phase and the second phase.
  7. The step of adjusting the data signal based on the first phase and the second phase is: A step of adjusting the phase information in the frequency domain corresponding to the data signal based on the first phase and the second phase, The method according to claim 6, comprising the steps of adjusting time- domain phase information corresponding to the data signal based on the first phase and the second phase, or adjusting clock information based on the first phase and the second phase, wherein the clock information is used to transmit the data signal.
  8. The step of transmitting phase information to the second device is: The method according to claim 2, comprising the step of transmitting the phase information to the second device via a first interface, wherein the first interface is one of the following interfaces: namely, a common public radio interface CPRI or an extended common public radio interface eCPRI.
  9. A communication method, wherein the method is applied to a second device, and the method is The steps include receiving a first signal from a first device, A method comprising the steps of: transmitting a second signal to the first device, wherein the second signal and the first signal are two signals whose transmission directions are opposite in a first transmission line, the first signal and the second signal are signals that carry different data, the phase of the transmitted second signal is determined based on the phase of the received first signal, and the first signal and the second signal are used to adjust the data signal of the first transmission line.
  10. The aforementioned method, A step of receiving phase information from the first device, wherein the phase information is determined based on the first signal and the second signal. The method according to claim 9, further comprising the step of adjusting the data signal of the first transmission line based on the phase information.
  11. The method according to claim 10, wherein the phase information indicates a measured phase difference, the measured phase difference is determined based on a first phase of the first signal transmitted by the first device and a second phase of the second signal received by the first device, or the phase information indicates a fluctuating phase difference, the fluctuating phase difference is determined based on the measured phase difference and a reference phase difference.
  12. The method according to claim 11, wherein the reference phase difference is a reference phase difference for signal transmission in the first transmission line, or the reference phase difference is a reference phase difference for signal transmission in the second transmission line, and the second transmission line is a transmission line different from the first transmission line.
  13. The method according to claim 11, wherein the phase information indicates a corresponding value of the measured phase difference calculated at at least one frequency , or the phase information indicates a corresponding value of the fluctuating phase difference calculated at at least one frequency .
  14. The step of adjusting the data signal of the first transmission line based on the phase information is: A step of adjusting the phase information in the frequency domain corresponding to the data signal based on the phase information, The method according to claim 10, comprising the step of adjusting time-domain phase information corresponding to the data signal based on the phase information, or the step of adjusting clock information based on the phase information, wherein the clock information is used to transmit the data signal.
  15. The step of receiving phase information from the first device is: The method according to claim 9, comprising the step of receiving the phase information from the first device via a first interface, wherein the first interface is one of the following interfaces: namely, a common public radio interface CPRI or an extended common public radio interface eCPRI.
  16. A communication device comprising a module configured to perform the method described in any one of claims 1 to 8.
  17. A communication device comprising a module configured to perform the method described in any one of claims 9 to 15.
  18. A communication device comprising a processor, wherein the processor is coupled to a memory, the memory is configured to store computer programs or instructions, and the processor is configured to execute the computer programs or instructions to perform the method according to any one of claims 1 to 8.
  19. A communication device comprising a processor, wherein the processor is coupled to a memory, the memory is configured to store computer programs or instructions, and the processor is configured to execute the computer programs or instructions to perform the method according to any one of claims 9 to 15.
  20. A computer program comprising instructions, wherein when the instructions are executed in a computer, the computer is enabled to perform the method described in any one of claims 1 to 8.

Description

The embodiments of this application relate to the field of communications, and more specifically, to communications methods, communications devices, and communications systems. With advancements in communication technology, baseband units (BUs) and radio units (RUs) may be deployed in different geographical locations to jointly provide services to users, thereby improving network coverage. However, due to environmental influences on the transmission path between the RUs and BUs, a phase difference may exist in the data signals transmitted between the RUs and BUs. This phase difference can prevent the receiving end of the data signal from correctly analyzing the signal. Therefore, communication methods, baseband units, and wireless units are urgently needed to improve the reliability of data transmission. This is a schematic diagram of a system to which the method according to one embodiment of this application can be applied.This is a schematic diagram of a functional partitioning scheme for different interfaces applicable to one embodiment of this application.This is a schematic diagram of a system to which multiple connection methods can be applied according to one embodiment of this application.This is an explanatory diagram of phase difference and fluctuating phase difference according to one embodiment of the present application.This is a schematic flowchart of a communication method according to one embodiment of this application.This is a schematic flowchart of two methods for obtaining a reference phase difference using a baseband unit, according to one embodiment of this application.This is a schematic flowchart of a method for communication between different wireless units according to one embodiment of the present application.This is a schematic flowchart of a method for communication between different baseband units according to one embodiment of the present application.This is a diagram illustrating signal transmission between the baseband unit and the wireless unit.This is a schematic diagram of the structure of a possible communication device according to one embodiment of this application.This is a schematic diagram of the structure of a possible communication device according to one embodiment of this application. The following describes the technical solutions of the embodiments in this application with reference to the attached drawings. The technical solutions in the embodiments of this application may be applied to various communication systems, such as long-term evolution (LTE) systems, frequency division duplex (FDD) systems, time division duplex (TDD) systems, 5th generation (5G) systems, new radio (NR) systems, 6th generation (6G) systems, or future communication systems. The 5G mobile communication systems in this application include non-standalone (NSA) 5G mobile communication systems and standalone (SA) 5G mobile communication systems. Alternatively, the communication system may be a public land mobile network (PLMN), a device-to-device (D2D) communication system, a machine-to-machine (M2M) communication system, an Internet of Things (IoT) communication system, a vehicle-to-everything (V2X) communication system, an unmanned aerial vehicle (UAV) communication system, or another communication system. In addition, the network architectures and service scenarios described in the embodiments of this application are intended to more clearly illustrate the technical solutions in the embodiments of this application and do not constitute any limitation to the technical solutions provided in the embodiments of this application. Those skilled in the art will know that, with the development of network architectures and the emergence of new service scenarios, the technical solutions provided in the embodiments of this application may also be applicable to similar technical challenges. To facilitate understanding of the embodiments of this application, the application scenarios of the embodiments of this application will first be described in detail with reference to Figure 1. Figure 1 is a schematic diagram of the structure of a communication system to which one embodiment of this application can be applied. First, the devices that may be used in the communication system will be described. Radio unit (RU) 110: The radio unit 110 can perform functions such as intermediate frequency processing, radio frequency processing, and signal duplexing. For example, the radio unit 110 may be a remote radio unit (RRU), an active antenna unit (AAU), an open radio unit (O-RU) in an open-radio access network (O-RAN), or another network element or communication device capable of processing intermediate frequency signals, radio frequency signals, or intermediate radio frequency signals. Baseband unit (BU) 120: The baseband unit 120 can implement the function of processing baseband signals. For example, the baseband unit 120 may be a baseband unit (BBU), a central unit (CU), a distributed unit (DU), an open-dis