Communication methods, communication devices, and communication systems

Abstract

[0009] Embodiments of the present application provide a communication method, a communication device, and a communication system. The communication method applied to a first device includes the steps of: transmitting a first signal to a second device, where the transmitted first signal has a first phase; and receiving a second signal from the second device, where the second signal and the first signal are two signals whose transmission directions are opposite to each other on a first transmission path, and the received second signal has a second phase, and the first and second phases are used to adjust a data signal on the first transmission path. Based on this technical solution, the phase difference between the first and second phases indicates the effect of two bidirectional transmissions on the phase of the first transmission path, and the first and second phases can be used to adjust the data signal to improve the reliability of data signal transmission on the first transmission path.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of communications, and more specifically, to a communication method, a communication device, and a communication system.

Background Art

[0002] With the development of communication technologies, in order to improve the coverage ability of a network, a baseband unit (BU) and a radio unit (RU) may be arranged at different geographical locations to jointly provide services to users. However, due to the influence of the environment on the transmission path between the RU and the BU, there may be a phase difference in the phase of the data signal transmitted between the RU and the BU. Due to the phase difference, the receiving end of the data signal may not be able to correctly analyze the data signal.

[0003] Therefore, in order to improve the reliability of data transmission, a communication method, a baseband unit, and a radio unit are urgently needed.

Summary of the Invention

Means for Solving the Problems

[0004] Embodiments of the present application provide a communication method, a communication device, and a communication system to improve the reliability of data transmission.

[0005] According to a first aspect, a communication method is provided. The method may be executed by a first device or a chip in the first device. The method includes: transmitting a first signal to a second device, where the phase of the first signal is a first phase; and receiving a second signal from the second device, where the second signal and the first signal are two signals with opposite transmission directions on a first transmission path, the phase of the received second signal is a second phase, and the first phase and the second phase are used to adjust the data signal on the first transmission path.

[0006] Based on this technical solution, the phase of the first signal transmitted by the first device on the first transmission line is the first phase, and the phase of the second signal received on the first transmission line is the second phase. The second signal is generated by the second device based on the first signal, and the phase difference between the first phase and the second phase indicates the effect of two bidirectional transmissions on the phase of the first transmission line. Therefore, the first and second phases can be used to adjust the data signal on the first transmission line, thereby improving the reliability of data signal transmission on the first transmission line.

[0007] In addition, the first and second signals may be any signals transmitted and received between the first and second devices. In cases where the first and second devices process data services, the first and second signals may be data service signals that can be transmitted between the second and first devices, and in cases where the first and second devices do not process data services, the first and second signals may be signals used for communication negotiation between the first and second devices. In other words, in this embodiment, the phase may be measured using signals transmitted between the first and second devices, and dedicated transmission resources do not need to be allocated to the first and second signals for phase measurement, thereby supporting frequent signal measurements, reducing the impact on service data transmission, and saving on the consumption of transmission resources.

[0008] In relation to the first aspect, in some embodiments of the first aspect, the method further includes the step of transmitting phase information to a second device, wherein the phase information is determined based on a first phase and a second phase, and the phase information is used to adjust a data signal.

[0009] Based on this technical solution, the second device and the first device have different design divisions for operation, for example, eCPRIIn the transmission protocol, some baseband processing may be performed by a second device or by the first device. In scenarios where the data signal is tuned to be more suitable for execution by the second device, the first device may transmit phase information to the second device, thereby supporting a flexible method for tuning the data signal.

[0010] In relation to the first aspect, in some embodiments of the first aspect, the phase information indicates a measured phase difference, which is determined based on a first phase and a second phase, or the phase information indicates a fluctuating phase difference, which is determined based on a measured phase difference and a reference phase difference.

[0011] Based on this technical solution, when phase information indicates a measured phase difference, the measured phase difference can be used to adjust the data signal of the first transmission line in order to improve the reliability of data signal transmission, thereby compensating for the influence of the first transmission line on the data signal transmitted between the first and second devices.

[0012] When phase information indicates a fluctuating phase difference, the measured phase difference may not affect the analysis of the data signal. For example, the receiving end of the data signal may pre-configure a reference phase difference or be given a reference phase difference and analyze the data signal based on the reference phase difference. If the difference between the measured phase difference and the reference phase difference is less than a certain threshold, the first or second device may no longer perform phase compensation on the data signal of the first transmission line based on the measured phase difference. If the difference between the measured phase difference and the reference phase difference is greater than or equal to a certain threshold, the first device may perform phase compensation on the data signal of the first transmission line based on the difference between the reference phase difference and the measured phase difference. Therefore, since the transmission distance of the transmission line usually does not change and other environmental factors such as temperature usually change slowly, the influence of the transmission line on the phase of the data signal may be considered to be unchanged or to change only slightly over a certain period. Therefore, after the first device obtains the measured phase difference by measurement, the first device may compare the measured phase difference with the reference phase difference and adjust the data signal of the first transmission line based on the fluctuating phase difference between the measured phase difference and the reference phase difference. Therefore, the number or extent of compensation performed on the data signal can be reduced in order to improve the efficiency of data signal transmission while simultaneously improving the reliability of data signal transmission.

[0013] In relation to the first aspect, in some embodiments of the first aspect, the reference phase difference is a reference phase difference for signal transmission in a first transmission line, or the reference phase difference is a reference phase difference for signal transmission in a second transmission line, the second transmission line being a different transmission line from the first transmission line.

[0014] Based on this technical solution, when the reference phase difference is the reference phase difference for signal transmission in the first transmission line, phase compensation is performed based on the fluctuating phase difference obtained using the reference phase difference. This ensures that the influence of the first transmission line on the phase of the data signal is maintained at a constant level, thereby improving the reliability of data signal transmission in the first transmission line. When the reference phase difference is the reference phase difference for signal transmission in the second transmission line, phase compensation is performed on the data signal in the first transmission line based on the fluctuating phase difference obtained using the reference phase difference. This ensures that the influence of the two transmission lines on the phase of the data signal is matched, thereby improving the reliability of coordination between multiple transmission lines.

[0015] In relation to the first aspect, in some embodiments of the first aspect, the phase information is Corresponding values ​​of measured phase difference calculated at at least one frequency. This indicates, or the phase information is Corresponding values ​​of the fluctuating phase difference calculated at at least one frequency. This indicates.

[0016] Optionally, at least one frequency Number The information corresponding to each is frequency Number This shows the amount of phase adjustment.

[0017] Based on this technical solution, the first device takes the acquired measured phase difference or fluctuating phase difference at at least one frequency Number This allows for conversion, thereby reducing the processing complexity required for adjusting the data signal by a second device.

[0018] In relation to the first aspect, in some embodiments of the first aspect, the data signal is adjusted based on a first phase and a second phase.

[0019] For example, the first device adjusts the data signal of the first transmission line based on the measured phase difference or the fluctuating phase difference.

[0020] In relation to the first aspect, in some embodiments of the first aspect, the adjustment of a data signal based on a first phase and a second phase includes the steps of: adjusting frequency domain information corresponding to the data signal based on a first phase and a second phase; adjusting time domain information corresponding to the data signal based on a first phase and a second phase; or adjusting clock information based on a first phase and a second phase, wherein the clock information is used to transmit the data signal.

[0021] Based on this technical solution, the first device may support multiple methods for adjusting data signals so that various application scenarios can be supported.

[0022] In relation to the first aspect, in some embodiments of the first aspect, the step of transmitting phase information to a second device includes the step of transmitting 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.

[0023] According to a second embodiment, a communication method is provided. This method may be performed by a second device or a chip in the second device. The method includes the steps of: receiving a first signal from a first device; and 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 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 coordinate a data signal in the first transmission line.

[0024] Based on this technical solution, the phase of the first signal transmitted by the first device on the first transmission path is the first phase, and the phase of the second signal received on the first transmission path is the second phase. The second signal is generated by the second device based on the first signal, and the phase difference between the first phase and the second phase indicates the influence of two-way transmission on the phase of the first transmission path. Therefore, the first phase and the second phase can be used to adjust the data signal on the first transmission path, and the reliability of data signal transmission on the first transmission path can be improved.

[0025] In connection with the second aspect, in some embodiments of the second aspect, the method further includes receiving phase information from the first device, where the phase information is determined based on the first signal and the second signal, and adjusting the data signal on the first transmission path based on the phase information.

[0026] In connection with the second aspect, in some embodiments of the second aspect, the phase information indicates a measured phase difference, where the measured phase difference is determined based on the first phase of the first signal transmitted by the first device and the second phase of the second signal received by the first device, or the phase information indicates a variable phase difference, where the variable phase difference is determined based on the measured phase difference and a reference phase difference.

[0027] In connection with the second aspect, in some embodiments of the second aspect, the reference phase difference is a reference phase difference for signal transmission on the first transmission path, or the reference phase difference is a reference phase difference for signal transmission on the second transmission path, and the second transmission path is a different transmission path from the first transmission path.

[0028] In connection with the second aspect, in some embodiments of the second aspect, the phase information indicates Corresponding values ​​of measured phase difference calculated at at least one frequency. or the phase information indicates Corresponding values ​​of the fluctuating phase difference calculated at at least one frequency.

[0029] In relation to the second aspect, in some embodiments of the second aspect, the step of adjusting a data signal of a first transmission line based on phase information includes the step of adjusting frequency domain information corresponding to the data signal based on phase information, the step of adjusting time domain information corresponding to the data signal based on phase information, or the step of adjusting clock information based on phase information, wherein the clock information is used to transmit the data signal.

[0030] In relation to the second aspect, in some embodiments of the second aspect, the step of receiving phase information from the first device includes the step of receiving 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.

[0031] The second embodiment is a method of the second apparatus corresponding to the embodiment of the first embodiment. For the beneficial technical effects of the second embodiment, please refer to the description of the relevant embodiment of the first embodiment. Further details are not provided here.

[0032] According to the third aspect, communication method It will be provided. The method includes a first device transmitting a first signal to a second device, wherein the phase of the first signal transmitted by the first device is a first phase, the second device 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 the first transmission line, the phase of the second signal transmitted by the second device is determined based on the phase of the first signal received by the second device, the phase of the second signal received by the first device is a second phase, and the first phase and the second phase are used to adjust the data signal in the first transmission line. nothing.

[0033] Based on this technical solution, the phase of the first signal transmitted by the first device on the first transmission line is the first phase, and the phase of the second signal received on the first transmission line is the second phase. The second signal is generated by the second device based on the first signal, and the phase difference between the first phase and the second phase indicates the effect of two bidirectional transmissions on the phase of the first transmission line. Therefore, the first and second phases can be used to adjust the data signal on the first transmission line, thereby improving the reliability of data signal transmission on the first transmission line.

[0034] In relation to the third aspect, in some embodiments of the third aspect, the first device transmits phase information to the second device, which is determined based on a first phase and a second phase, and the phase information is used to adjust the data signal, and the second device adjusts the data signal of the first transmission line based on the phase information.

[0035] In relation to the third aspect, in some embodiments of the third aspect, the first device adjusts the data signal based on a first phase and a second phase.

[0036] In relation to the third aspect, in some embodiments of the third aspect, the transmission of phase information by the first device to the second device includes the first device transmitting phase information to the second device via a first interface, the first interface being one of the following interfaces: a Common Public Radio Interface (CPRI) or an Extended Common Public Radio Interface (eCPRI).

[0037] The third embodiment is a method of the system corresponding to the embodiment of the first embodiment. For the beneficial technical effects of the third embodiment, please refer to the description of the relevant embodiment of the first embodiment. Details will not be described again here.

[0038] According to a fourth aspect, a communication device is provided. The communication device includes a transceiver module and a processing module. The processing module is configured to generate a first signal, and the transceiver module is configured to transmit the first signal to a second device, wherein the phase of the first signal transmitted by the first device is a first phase. The transceiver module is further configured to receive 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 path, wherein the phase of the second signal received by the first device is a second phase, and the first phase and the second phase are used to adjust the data signal in the first transmission path.

[0039] Based on this technical solution, the phase of the first signal transmitted by the first device on the first transmission line is the first phase, and the phase of the second signal received on the first transmission line is the second phase. The second signal is generated by the second device based on the first signal, and the phase difference between the first phase and the second phase indicates the effect of two bidirectional transmissions on the phase of the first transmission line. Therefore, the first and second phases can be used to adjust the data signal on the first transmission line, thereby improving the reliability of data signal transmission on the first transmission line.

[0040] In relation to the fourth aspect, in some embodiments of the fourth aspect, the transceiver module is further configured to transmit phase information to a second device, the phase information being determined based on a first phase and a second phase, and the phase information being used to adjust the data signal.

[0041] In relation to the fourth aspect, in some embodiments of the fourth aspect, the phase information indicates a measured phase difference, which is determined based on a first phase and a second phase, or the phase information indicates a fluctuating phase difference, which is determined based on a measured phase difference and a reference phase difference.

[0042] In relation to the fourth aspect, in some embodiments of the fourth aspect, 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 first transmission line is a transmission line different from the first transmission line.

[0043] In relation to the fourth aspect, in some embodiments of the fourth aspect, the phase information is The measured phase difference is calculated at at least one frequency. The information includes the corresponding information, or the phase information is The variation in phase difference is calculated at at least one frequency. Includes corresponding information.

[0044] In relation to the fourth aspect, in some embodiments of the fourth aspect, the processing module is configured to adjust the data signal based on a first phase and a second phase.

[0045] In relation to the fourth aspect, in some embodiments of the fourth aspect, the processing module is configured to adjust frequency domain information corresponding to a data signal based on a first phase and a second phase, or the processing module is configured to adjust time domain information corresponding to a data signal based on a first phase and a second phase, or the processing module is configured to adjust clock information based on a first phase and a second phase, and the clock information is used to transmit a data signal.

[0046] In relation to the fourth aspect, in some embodiments of the fourth aspect, the transceiver module is configured to transmit phase information to a second device via a first interface, the first interface being one of the following interfaces: namely, a common public radio interface CPRI or an extended common public radio interface eCPRI.

[0047] The fourth embodiment is an apparatus of the first apparatus corresponding to the first embodiment. For the beneficial technical effects of the fourth embodiment, please refer to the description of the relevant embodiment of the first embodiment. Details will not be described again here.

[0048] According to a fifth aspect, a communication device is provided. The communication device includes a transceiver module and a processing module. The transceiver module is configured to receive a first signal from a first device. The processing module is configured to generate a second signal, and the first signal and the second signal are used to adjust the data signal on a first transmission line. The transceiver module is further configured to transmit a second signal, and the second signal and the first signal are two signals whose transmission directions are opposite on the first transmission line, and the phase of the second signal transmitted by the transceiver module is determined based on the phase of the first signal received by the transceiver module.

[0049] Based on this technical solution, the phase of the first signal transmitted by the first device on the first transmission line is the first phase, and the phase of the second signal received on the first transmission line is the second phase. The second signal is generated by the second device based on the first signal, and the phase difference between the first phase and the second phase indicates the effect of two bidirectional transmissions on the phase of the first transmission line. Therefore, the first and second phases can be used to adjust the data signal on the first transmission line, thereby improving the reliability of data signal transmission on the first transmission line.

[0050] In relation to the fifth aspect, in some embodiments of the fifth aspect, the transceiver module is further configured to receive phase information from the first device, the phase information being determined based on a first signal and a second signal, and the processing module is further configured to adjust the data signal of the first transmission line based on the phase information.

[0051] In relation to the fifth aspect, in some embodiments of the fifth aspect, the phase information indicates a measured phase difference, which is determined based on a first phase of a first signal transmitted by the first device and a second phase of a second signal received by the first device, or the phase information indicates a fluctuating phase difference, which is determined based on a measured phase difference and a reference phase difference.

[0052] In relation to the fifth aspect, in some embodiments of the fifth aspect, the reference phase difference is a reference phase difference for signal transmission in a first transmission line, or the reference phase difference is a reference phase difference for signal transmission in a second transmission line, the second transmission line being a different transmission line from the first transmission line.

[0053] In relation to the fifth aspect, in some embodiments of the fifth aspect, the phase information is Corresponding values ​​of measured phase difference calculated at at least one frequency. This indicates, or the phase information is Corresponding values ​​of the fluctuating phase difference calculated at at least one frequency. This indicates.

[0054] In relation to the fifth aspect, in some embodiments of the fifth aspect, the processing module is configured to adjust frequency domain information corresponding to a data signal based on phase information, or to adjust time domain information corresponding to a data signal based on phase information, or to adjust clock information based on phase information, the clock information being used to transmit a data signal.

[0055] In relation to the fifth aspect, in some embodiments of the fifth aspect, the transceiver module is configured to receive phase information from a first device via a first interface, the first interface being one of the following interfaces: a common public radio interface CPRI or an extended common public radio interface eCPRI.

[0056] The fifth embodiment is an apparatus of the second apparatus corresponding to the first embodiment. For the beneficial technical effects of the fifth embodiment, please refer to the description of the relevant embodiment of the first embodiment. Details will not be described again here.

[0057] According to a sixth aspect, a communication method is provided. This method may be performed by a first device or a chip within the first device. The method includes the first device transmitting phase information to a second device, the phase information being used to adjust data signals on a first transmission line, and the first transmission line being a transmission line between the first device and the second device.

[0058] According to the seventh aspect, communication method It will be provided. The method may be performed by a second device or a chip within the second device, and the method includes the second device receiving phase information from the first device, the second device adjusting the data signal of the first transmission line based on the phase information, and the first transmission line being a transmission line between the first device and the second device. nothing.

[0059] According to the eighth aspect, communication method It will be provided. The method is performed by a first radio frequency device or a chip within the first radio frequency device, and the method includes the first radio frequency device transmitting a first signal to a second radio frequency device, wherein the phase of the first signal transmitted by the first radio frequency device is the first phase, the first radio frequency device receiving a second signal from the second radio frequency device, wherein the second signal and the first signal are two signals whose transmission directions are opposite in the first transmission line, the phase of the second signal received by the first radio frequency device is the second phase, and the first phase and the second phase are used to adjust the data signal in the first transmission line. nothing.

[0060] In relation to the eighth aspect, in some embodiments of the eighth aspect, the method further includes a first radio frequency device transmitting phase information to a second radio frequency device, the phase information being determined based on a first signal and a second signal, and the first radio frequency device adjusting the data signal of the first transmission line based on the phase information.

[0061] In relation to the eighth aspect, in some embodiments of the eighth aspect, the method further includes a first radio frequency device transmitting phase information to a baseband device, the phase information being determined based on a first signal and a second signal, and the phase information being used to adjust the data signal on the first transmission line.

[0062] According to the ninth aspect, a communication device is provided, including a processor. The processor may be coupled to memory and configured to execute instructions in memory in order to perform the method in the first aspect and any one of the possible embodiments of the first aspect. Optionally, the device further includes memory. Optionally, the device further includes a communication interface, and the processor is coupled to the communication interface.

[0063] In one embodiment, this device is the first device. When this device is the first device, the communication interface may be a transceiver or an input / output interface.

[0064] In another embodiment, the device is a chip or chip system configured in the first device. When the device is a chip configured in the first device, the communication interface may be an input / output interface. The chip system includes at least one chip and may further include other circuit structures and / or separate devices.

[0065] Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0066] According to a tenth aspect, a communication device is provided, which includes a processor. The processor may be coupled to memory and configured to execute instructions in memory in order to perform the method in the second aspect and any one of the possible embodiments of the second aspect. Optionally, the device further includes memory. Optionally, the device further includes a communication interface, and the processor is coupled to the communication interface.

[0067] In one embodiment, this device is a second device. When this device is a second device, the communication interface may be a transceiver or an input / output interface.

[0068] In another embodiment, the device is a chip or chip system configured in a second device. When the device is a chip configured in a second device, the communication interface may be an input / output interface.

[0069] Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0070] According to an eleventh aspect, the present application provides a processor including an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit the signal through the output circuit, so that the processor performs the method of the preceding aspects.

[0071] In a particular implementation process, the processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, or various logic circuits. The input signal received by the input circuit may be received and input by a receiver, for example, but not limited to this case, and the signal output by the output circuit may be output to a transmitter, for example, but not limited to this case, and transmitted by the transmitter. The input circuit and the output circuit may be the same circuit, which is used as an input circuit and an output circuit at different times. Specific embodiments of the processor and various circuits are not limited to the embodiments of this application.

[0072] According to a twelfth aspect, the present application provides a processing apparatus including a communication interface and a processor. The communication interface is coupled to the processor. The communication interface is configured to input and / or output information. The information includes at least one instruction or data. The processor is configured to execute a computer program so that the processing apparatus performs the method of the preceding aspects.

[0073] According to a thirteenth aspect, the present application provides a processing apparatus including a processor and memory. The processor is configured to read instructions stored in memory, receive signals using a receiver, and transmit signals using a transmitter, so that the processing apparatus performs the methods of the preceding aspects.

[0074] Optionally, there may be one or more processors. Memory may be present, or there may be one or more memory modules.

[0075] Optionally, the memory may be integrated with the processor, or the memory and processor may be located separately.

[0076] In a particular implementation process, the memory may be non-transitory memory, such as read-only memory (ROM). The memory and processor may be integrated on a single chip or located separately on different chips. The type of memory, as well as the arrangement of the memory and processor, is not limited to this embodiment of the present application.

[0077] In the relevant information exchange process, for example, sending instruction information may be a process of outputting instruction information from the processor, and receiving instruction information may be a process of inputting the received instruction information into the processor. Specifically, information output by the processor may be output to a transmitter, and input information received by the processor may be from a receiver. The transmitter and receiver may collectively be called a transceiver.

[0078] The apparatus of the twelfth and thirteenth embodiments may be a chip or a chip system. The processor may be implemented in hardware or in software. When the processor is implemented in hardware, it may be a logic circuit or an integrated circuit, etc. When the processor is implemented in software, it may be a general-purpose processor or it may be implemented by reading software code stored in memory. Memory may be integrated into the processor or it may be located outside the processor and exist independently.

[0079] According to the fourteenth aspect, the present application provides a computer program product. The computer program product includes a computer program (also called code or instructions). When the computer program is executed, the computer is enabled to perform the methods of the preceding aspects.

[0080] According to the 15th aspect, the present application provides a computer-readable storage medium. The computer-readable storage medium stores computer programs (which may also be called code or instructions). When the computer programs are running on a computer, the computer is enabled to perform the methods of the aforementioned aspects.

[0081] According to the sixteenth aspect, the present application provides a system including the first and second devices described above. [Brief explanation of the drawing]

[0082] [Figure 1] This is a schematic diagram of a system to which the method according to one embodiment of this application can be applied. [Figure 2] This is a schematic diagram of a functional partitioning scheme for different interfaces applicable to one embodiment of this application. [Figure 3] This is a schematic diagram of a system to which multiple connection methods can be applied according to one embodiment of this application. [Figure 4] This is an explanatory diagram of phase difference and fluctuating phase difference according to one embodiment of the present application. [Figure 5] This is a schematic flowchart of a communication method according to one embodiment of this application. [Figure 6] 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. [Figure 7] This is a schematic flowchart of a method for communication between different wireless units according to one embodiment of the present application. [Figure 8] This is a schematic flowchart of a method for communication between different baseband units according to one embodiment of the present application. [Figure 9] This is a diagram illustrating signal transmission between the baseband unit and the wireless unit. [Figure 10] This is a schematic diagram of the structure of a possible communication device according to one embodiment of this application. [Figure 11] This is a schematic diagram of the structure of a possible communication device according to one embodiment of this application. [Modes for carrying out the invention]

[0083] The following describes the technical solutions of the embodiments in this application with reference to the attached drawings.

[0084] 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 or 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.

[0085] In addition, the network architecture 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 are relevant to the technical solutions provided in the embodiments of this application. Nothing This does not constitute a limitation. 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 are also applicable to similar technical challenges.

[0086] 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.

[0087] 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.

[0088] Radio unit (RU) 110: The radio unit 110 performs functions such as intermediate frequency processing, radio frequency processing, and signal duplexing. can 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.

[0089] Baseband unit (BU) 120: The baseband unit 120 provides the function of processing baseband signals. can For example, the baseband unit 120 may be a baseband unit (BBU), a central unit (CU), a distributed unit (DU), an open-distributed unit (O-DU) in the O-RAN, or another network element or communication device capable of processing baseband signals. A module configured to perform baseband processing in the baseband unit 120 may be called a baseband board, and there may be one or more baseband boards.

[0090] The communication interface between the baseband unit 120 and the radio unit 110 may be called a fronthaul interface. For example, the fronthaul interface may be a common public radio interface (CPRI), an eCPRI interface, or another interface to be defined in the future that is used to connect the baseband unit 120 and the radio unit 110. This is not particularly limited in this application.

[0091] Different interfaces may use different functional partitioning schemes. The following is from this application. fruit Different interfaces will be described using an example of an O-RAN system to which the implementation configuration can be applied.

[0092] Figure 2 is a schematic diagram of a functional partitioning scheme for different interfaces applicable to one embodiment of this application.

[0093] Refer to Figure 2. In a splitting scheme employing the CPRI interface, in the downlink direction, the O-DU may have the functions of radio link control (RLC), medium access control (MAC), as well as coding, rate matching, scrambling, modulation, layer mapping, pre-coding, resource element mapping, inverse fast fourier transform (IFFT), and cyclic prefix addition. Correspondingly, in the uplink direction, the O-DU may have the functions of fast fourier transform (f ast Threeier transfor m、The O-RU may have functions such as FFT, cyclic prefix removal, resource element de-mapping, channel estimation / equalization, inverse discrete Fourier transform (IDFT), demodulation, de-scrambling, rate de-matching, decoding, and medium access control (MAC), as well as radio link control (RLC). The O-RU has corresponding functions for the downlink direction and downlink radio frequency.

[0094] The eCPRI interface may use multiple baseband processing division schemes. The baseband division may be symmetric in the uplink and downlink directions, or asymmetric in the uplink and downlink directions. Figure 2 shows one such scheme, which is not particularly limited in this application. In the division scheme used by the eCPRI interface shown in Figure 2, in the downlink direction, the O-DU may have radio link control (RLC) functions, medium access control (MAC) functions, and coding, rate matching, scrambling, modulation, and layer mapping functions. In the uplink direction, the O-DU may have functions for channel estimation / equalization, inverse discrete Fourier transform (IDFT), demodulation, de-scrambling, rate de-matching, decoding, and medium access control (MAC), as well as radio link control (RLC). In the downlink direction, the O-RU may have functions for pre-coding, resource element mapping, inverse fast Fourier transform (IFFT), and cyclic prefix addition, as well as radio frequency. In the uplink direction, the O-RU may have functions for radio frequency and fast Fourier transform (f ast Threeier transfor m、It has the functions of FFT, cyclic prefix removal, and resource element de-mapping.

[0095] Figure 3 is a schematic diagram of a system to which multiple connection methods can be applied according to one embodiment of the present application. This system may include multiple wireless units connected in a direct connection manner. For example, see Figure 3(a). Baseband unit 121 is directly connected separately to wireless units 111 and 112, and baseband unit 1 2 1 is an interface (for example, eCPRI The system communicates directly with the radio unit 112 via an interface. This system may also be a system that includes multiple radio units in a cascaded configuration. See, for example, Figure 3(b). The baseband unit 122 is directly connected to the radio unit 113, the radio unit 113 is directly connected to the radio unit 114, the baseband unit 122 can communicate directly with the radio unit 113, and the baseband unit 122 and the radio unit 114 communicate with each other using the radio unit 113. This system may also be a system that includes multiple baseband units. See, for example, Figure 3(c). The baseband unit 123 and the baseband unit 124 are directly connected. This system may further include at least one radio unit (not shown), which may be connected by reference to the direct connection method described above, or by reference to the cascaded connection method described above.

[0096] It should be understood that the foregoing describes only some connection methods applicable to embodiments of this application. There may be other connection methods applicable to embodiments of this application in which the wireless unit and the baseband unit can communicate with each other. These are not particularly limited in this application.

[0097] The transmission path environment between two network devices, for example, between the baseband unit 120 and the wireless unit 110 shown in Figure 1, can affect the phase of the data signal. To facilitate understanding of the embodiments of this application, phase difference and phase variation will be described below with reference to Figure 4.

[0098] Figure 4 is an explanatory diagram of phase difference and fluctuating phase difference. Please refer to Figure 4. An example is used in which a baseband unit transmits a signal based on a clock signal (e.g., a 122.88 MHz clock). Radio unit #1 receives signal 1 from the baseband unit at time t1. It can be seen that a phase difference (which may also be called phase drift) occurs between the transmitted signal 1 and the clock signal, as shown in the figure. Due to the phase difference, the receiving end of signal 1 may not be able to correctly analyze signal 1. In addition, the environment of the transmission path between the baseband unit and radio unit #1 may change over time. For example, the temperature or humidity in the transmission path may change between time t1 and time t2. Radio unit #1 receives signal 2 from the baseband unit at time t2, and signal 2 is still transmitted by the baseband unit based on the clock signal. However, please refer to Figure 4. A phase difference also exists between signal 2 received by radio unit #1 and signal 1, and this phase difference may be called fluctuating phase difference #1, i.e., a phase difference caused by phase fluctuation. Fluctuation phase difference affects the stability of data signals transmitted between the baseband unit and radio unit #1, and further affects the reliability of data signal transmission. When the baseband unit is connected to multiple radio units, for example, in the direct connection and cascaded connection methods shown in Figure 3, the multiple radio units can cooperate with each other. However, since the transmission paths between the baseband unit and different radio units are different, the influence of the different transmission paths on the phase of the data signals can also differ. See, for example, Figure 4. There is also a phase difference between signal 2 received from the baseband unit by radio unit #1 at time t2 and signal 3 received from the baseband unit by radio unit #2 at time t2. This phase difference may be called fluctuation phase difference #2, and fluctuation phase difference #2 can affect the cooperation between radio unit #1 and radio unit #2. This reduces the reliability of data transmission. Therefore, embodiments of this application provide a communication method, communication device, and communication system to improve the reliability of data transmission. The communication method will be described first with reference to Figures 5 to 10.

[0099] The methods shown in Figures 5 and 6 can be applied to a first and a second apparatus. In Figures 5 and 6, an example is used in which baseband unit #1 is used as the first apparatus and radio unit #1 is used as the second apparatus for illustrative purposes. The method shown in Figure 7 can be applied to different radio frequency apparatus. In Figure 8, radio unit #1 and radio unit #2 are used as illustrative examples. The method shown in Figure 8 can be applied to different control devices. In Figure 9, baseband unit #1 and baseband unit #2 are used as illustrative examples.

[0100] Figure 5 is a schematic flowchart of a communication method according to one embodiment of this application.

[0101] The method shown in Figure 5 may be applied to a first and a second device. For illustrative purposes, the following example uses a baseband unit #1 as the first device and a radio unit #1 as the second device. Details are not described below. Baseband unit #1 and radio unit #1, for example, baseband unit 121 and radio unit 111 shown in Figure 3(a), and baseband unit 122 and radio unit 113 shown in Figure 3(b), may be directly connected. Alternatively, baseband unit #1 and radio unit #1, for example, baseband unit 122 and radio unit 114 shown in Figure 3(b), may communicate with each other using a separate network device. Alternatively, baseband unit #1 and the radio units may use a different connection method that enables baseband unit #1 and the radio units to communicate with each other. This is not particularly limited in this application.

[0102] S510: Baseband unit #1 transmits a first signal to radio unit #1, and in response, radio unit #1 receives a first signal from baseband unit #1.

[0103] The phase of the first signal transmitted by baseband unit #1 is the first phase.

[0104] The baseband unit #1 may transmit a first signal to the radio unit #1 via a first interface, and the first interface is CPRI Interface, eCPRI This may be an interface, or another interface to be defined in the future, used for communication between the baseband unit and the radio unit.

[0105] The phase of the first signal transmitted by baseband unit #1 may be determined based on the phase of the clock. For example, the first signal may be a signal obtained by clock modulation, a signal transmitted by the clock, or a signal carrying clock information.

[0106] For example, baseband unit #1 may transmit a first signal based on a local clock source (e.g., a system clock of 122.88 MHz). In this case, the frequency of the first signal is 122.88 MHz, and the first phase is the initial phase carried by the clock source.

[0107] It should be noted that the first signal may be any signal received or transmitted between the baseband unit and the radio unit. After receiving the first signal, the radio unit may obtain the phase of the received first signal by clock data recovery (CDR). In cases where the baseband unit and radio unit handle data services, the first signal may be a data service signal that can be transmitted between the baseband unit and the radio unit; in cases where the baseband unit and radio unit do not handle data services, the first signal may be a signal used for communication negotiation between the baseband unit and the radio unit. In other words, in this embodiment, the phase may be measured using a signal transmitted between the baseband unit and the radio unit, eliminating the need for dedicated transmission resources to be allocated to the first signal for phase measurement, thereby supporting frequent signal measurements, reducing the impact on service data transmission, and saving transmission resource consumption.

[0108] S520: Radio unit #1 transmits a second signal to baseband unit #1 based on the first signal, and in response, baseband unit #1 receives the second signal from radio unit #1.

[0109] The second signal and the first signal are two signals whose transmission directions are opposite in the first transmission path, and the phase of the second signal received by baseband unit #1 is the second phase.

[0110] It should be noted that the first transmission path is the transmission path between radio unit #1 and baseband unit #1, for example, an optical fiber transmission path between radio unit #1 and baseband unit #1. In addition, the first transmission path may be a transmission path that supports bidirectional signal transmission (for example, an optical fiber that supports bidirectional signal transmission). Alternatively, the first transmission path may be two unidirectional physical transmission paths in substantially the same environment (for example, two unidirectional transmission optical fibers in the same environment). Specifically, the first signal and the second signal are transmitted through two different physical transmission paths, but the transmission environment of the two physical transmission paths is similar, for example, the transmission distance, temperature, and humidity of the transmission paths are similar. Therefore, the effect of the transmission of the first transmission path on the phase of the first signal can be considered to be substantially the same as that on the phase of the second signal.

[0111] It should be further noted that the time when baseband unit #1 transmits the first signal is closely related to the time when radio unit #1 transmits the second signal, i.e., the time interval is short. In other words, within the time interval, the transmission environment of the first transmission path does not significantly affect the phase of the signal. Therefore, when it is determined that the phase of the signal transmitted on the first transmission path has changed, the phase change experienced when baseband unit #1 transmits the first signal can be considered to be approximately the same as the phase change experienced when radio unit #1 transmits the second signal. For example, if the phase of the first signal is delayed by 1 degree in the process of baseband unit #1 transmitting the first signal and transmitting the first signal on the first transmission path, then the phase of the second signal can also be considered to be delayed by 1 degree in the process of transmitting the second signal on the first transmission path.

[0112] In this embodiment of the present application, it may be understood that phase difference, phase drift, or phase change represents a change in phase amplitude in a direction, such as a lag amplitude or a lead amplitude. Further details are not described below.

[0113] Wireless unit #1 may use an optical propagation mirror to generate a second signal based on the first signal and return the second signal to baseband unit #1.

[0114] In possible embodiments, radio unit #1 may perform phase locking on the first signal to generate a second signal. Phase locking can be understood as performing specific circuit processing on the first signal so that the phase of the first signal remains constant. For example, radio unit #1 may perform a phase locking loop (phase locking loop). - A locked loop (PLL) module may be included, and the phase difference between the first signal input to the PLL module and the second signal output from the PLL module remains constant.

[0115] In possible embodiments, the second signal may be any signal received or transmitted between the baseband unit and the radio unit. After receiving the second signal, the baseband unit may obtain the phase of the received second signal by the CDR. In addition, it can be understood that the first and second signals may be signals carrying different data. For example, after the clock of the first signal is restored by the CDR, the clock may be added to another uplink signal, i.e., the second signal. Thus, the method in this embodiment of the present application can reduce the impact on service data transmission.

[0116] The baseband unit #1 may determine the phase difference based on the first phase of the transmitted first signal and the second phase of the received second signal. The baseband unit #1 may determine the phase difference in multiple ways. The methods by which the baseband unit #1 determines the phase difference are not limited in this application. Possible determination methods are described below as examples.

[0117] For example, baseband unit #1 separately performs modulation on a first clock carried by a first signal and a second clock carried by a second signal, and obtains a measured phase difference using the phase difference obtained by comparing the signal modulated by the first clock and the signal modulated by the second clock. The modulation process involves the clock and the modulation signal being at different frequencies to generate a new signal. Number This could mean that they are multiplied one by one. For example, baseband unit #1 uses the first clock used to transmit the first signal and the signal for modulation to obtain a signal modulated by the first clock. Number Multiply them one by one. Correspondingly, baseband unit #1 reconstructs the second signal to obtain the second clock, and then multiplies the second clock and the modulation signal to obtain the signal modulated by the second clock. Number Multiply them one by one. Baseband unit #1 determines the phase difference between the first signal and the second signal by comparing the phase differences of the two modulated signals.

[0118] In another example, baseband unit #1 separately performs frequency multiplication on a first clock carried by a first signal and a second clock carried by a second signal, and obtains a measured phase difference using the delay obtained by comparing the clock obtained by frequency multiplication on the first clock with the clock obtained by frequency multiplication on the second clock. Frequency multiplication is performed on the clock so that the phase difference can be expressed using the delay difference. by This means that a high-frequency clock signal is acquired.

[0119] In another example, baseband unit #1, through circuit processing, converts the first clock carried by the first signal and the second clock carried by the second signal separately into voltages, and determines the measured phase difference based on the voltage difference obtained by comparing the voltages. Circuit processing may mean that the clock is used as an input to a particular circuit, and the output voltage of that particular circuit may represent the phase of the clock. For example, baseband unit #1 uses the first clock as an input signal to a circuit and measures the voltage amplitude of the output voltage. Correspondingly, baseband unit #1 also uses the second clock as an input signal to a circuit and measures the voltage amplitude corresponding to the output voltage. Baseband unit #1 determines the phase difference between the first signal and the second signal by comparing the two voltage amplitudes.

[0120] It can be understood that the phase difference between the first phase of the first signal transmitted by baseband unit #1 and the second phase of the second signal received by baseband unit #1 is caused by two transmissions on the first transmission line. Therefore, baseband unit #1 may process the phase difference determined in the manner described above in order to obtain the measured phase difference caused by one transmission on the first transmission line. For example, baseband unit #1 may divide the difference between the first phase and the second phase by 2 as the measured phase difference. For example, if baseband unit #1 determines that the second signal is lagging by 8 degrees compared to the phase of the first signal, baseband unit #1 may determine that the measured phase difference is lagging by 4 degrees.

[0121] In possible embodiments, the measured phase difference may be used to adjust the data signal of the first transmission line. Specifically, the baseband unit #1 or the radio unit #1 may perform phase compensation on the data signal of the first transmission line based on the measured phase difference to improve the reliability of data signal transmission, thereby compensating for the data signal affected by the first transmission line transmitted between the baseband unit #1 and the radio unit #1.

[0122] In another possible embodiment, the measured phase difference may not affect the analysis of the data signal. For example, the receiving end of the data signal may pre-configure a reference phase difference or be shown a reference phase difference and analyze the data signal based on the reference phase difference. If the difference between the measured phase difference and the reference phase difference is less than a certain threshold, the baseband unit #1 or radio unit #1 may no longer perform phase compensation on the data signal of the first transmission line based on the measured phase difference. If the difference between the measured phase difference and the reference phase difference is greater than or equal to a certain threshold, the baseband unit #1 may perform phase compensation on the data signal of the first transmission line based on the difference between the reference phase difference and the measured phase difference. When the reference phase difference is the reference phase difference of the first transmission line, the difference between the measured phase difference and the reference phase difference may be caused by environmental changes in the first transmission line, for example, the fluctuating phase difference #1 shown in Figure 4. When the reference phase difference is on a different transmission path (for example, a second transmission path between baseband unit #1 and wireless unit #2), the difference between the measured phase difference and the reference phase difference may be affected by environmental differences between the first and second transmission paths, such as the fluctuating phase difference #2 shown in Figure 4.

[0123] Therefore, since the transmission distance of the transmission line does not usually change, and other environmental factors such as temperature usually change slowly, the influence of the transmission line on the phase of the data signal can be considered to be unchanged or to change only slightly over a certain period of time. Thus, after obtaining the measured phase difference by measurement, the baseband unit #1 can compare the measured phase difference with a reference phase difference and adjust the data signal of the first transmission line based on the fluctuating phase difference between the measured phase difference and the reference phase difference. Thus, the number or extent of compensation performed on the data signal can be reduced in order to improve the efficiency of data signal transmission while improving the reliability of data signal transmission. The following describes the method for obtaining the reference phase difference in step S530.

[0124] Optionally, in S530, baseband unit #1 acquires the reference phase difference.

[0125] The reference phase difference is either the reference phase difference for signal transmission in the first transmission line, or the reference phase difference is the reference phase difference in the second transmission line, where the first and second transmission lines are different transmission lines. To facilitate understanding step S530, the following describes two methods by which baseband unit #1 obtains the reference phase difference, with reference to Figure 6. Method a is used to obtain the reference phase difference for signal transmission in the first transmission line, and method b is used to obtain the reference phase difference for signal transmission in the second transmission line.

[0126] Method a: S531a: Baseband unit #1 transmits a third signal to radio unit #1, and in response, radio unit #1 receives a third signal from baseband unit #1.

[0127] Note that the time when baseband unit #1 transmits the third signal to radio unit #1 is before the time when baseband unit #1 transmits the first signal to radio unit #1.

[0128] The phase of the third signal transmitted by baseband unit #1 is the third phase. The method by which baseband unit #1 transmits the third signal to radio unit #1 is the same as the method by which the first signal is transmitted in step S510. Details will not be explained again here.

[0129] S532a: Radio unit #1 transmits a fourth signal to baseband unit #1 based on the third signal, and in response, baseband unit #1 receives the fourth signal from radio unit #1.

[0130] The phase of the fourth signal received by baseband unit #1 is the fourth phase. The method by which radio unit #1 transmits the fourth signal to baseband unit #1 is the same as the method by which the second signal is transmitted in step S520. Details are not described here again.

[0131] S533a: Baseband unit #1 determines the reference phase difference based on the third and fourth phases.

[0132] The method by which baseband unit #1 determines the reference phase difference based on the third and fourth phases is similar to the method by which baseband unit #1 determines the measured phase difference based on the first and second phases, as described in step S520. For example, the reference phase difference is half the difference between the third and fourth phases. Further details are not provided here.

[0133] Therefore, the reference phase difference can be used as the reference phase difference for the first transmission line.

[0134] For example, baseband unit #1 may periodically transmit multiple signals to radio unit #1 and receive signals corresponding to each of the multiple signals from radio unit #1. The third signal may be the first of the multiple signals. Specifically, baseband unit #1 may use the measured phase difference obtained by the initial measurement as a reference phase difference, and obtain a fluctuating phase difference by comparing the measured phase difference obtained by subsequent measurements with the reference phase difference. The fluctuating phase difference is used to adjust the data signal of the first transmission line.

[0135] For example, the phase of the signal initially transmitted by baseband unit #1 is the initial phase phase_0 carried by the clock source, and the phase based on the signal received by baseband unit #1 is phase_r_0. Since a phase difference phase_r_0-phase_0 is acquired during bidirectional transmission on the first transmission line, the phase change during unidirectional transmission on the first transmission line is delta_phase_0=(phase_r_0-phase_0) / 2, and this change can be set as the reference phase difference. Subsequently, baseband unit #1 can send and receive signals to and from radio unit #1 based on a preset period to acquire a measured phase difference, and can determine a fluctuating phase difference based on the measured phase difference and the reference phase difference, thereby allowing baseband unit #1 or radio unit #1 to adjust the data signal on the first transmission line based on the fluctuating phase difference. For example, if the phase of the signal transmitted by baseband unit #1 at the i-th time is phase_0 and the phase of the signal received by baseband unit #1 is phase_r_i, then the measured phase difference is (phase_r_i-phase_0) / 2 and the fluctuating phase difference is (phase_r_i-phase_0) / 2-(phase_r_0-phase_0) / 2.

[0136] Therefore, in method a, the reference phase difference is the reference phase difference of the first transmission line, and phase compensation is performed using the fluctuating phase difference obtained based on the reference phase difference. This ensures that the influence of the first transmission line on the phase of the data signal is maintained at a constant level, thereby improving the reliability of data signal transmission in the first transmission line.

[0137] Method b: S531b: Baseband unit #1 transmits a fifth signal to radio unit #2, and in response, radio unit #2 receives the fifth signal from baseband unit #1.

[0138] The phase of the fifth signal transmitted by baseband unit #1 is the fifth phase, and the method by which baseband unit #1 transmits the fifth signal to radio unit #2 is the same as the method by which the second signal is transmitted in step S510. Further details will not be explained here.

[0139] In possible embodiments, the time at which baseband unit #1 transmits the fifth signal to radio unit #2 is the same as the time at which baseband unit #1 transmits the first signal to radio unit #1, or the interval between the time at which baseband unit #1 transmits the fifth signal to radio unit #1 and the time at which baseband unit #1 transmits the first signal to radio unit #1 is below a certain threshold. Thus, the measured phase difference and reference phase difference are obtained by baseband unit #1, which synchronously transmits and receives signals with different radio units, thereby improving the reliability of the coordinated operation of multiple radio units.

[0140] S532b: Radio unit #2 transmits a sixth signal to baseband unit #1 based on the fifth signal, and in response, baseband unit #1 receives the sixth signal from radio unit #2.

[0141] The phase of the sixth signal received by baseband unit #1 is the sixth phase. The method by which radio unit #2 transmits the sixth signal to baseband unit #1 is the same as the method by which the second signal is transmitted in step S520. Details are not described here again.

[0142] S533b: Baseband unit #1 determines the reference phase difference based on the fifth and sixth phases.

[0143] The method by which baseband unit #1 determines the reference phase difference based on the fifth and sixth phases is similar to the method by which baseband unit #1 determines the measured phase difference based on the first and second phases, as described in step S520. For example, the reference phase difference is half the difference between the fifth and sixth phases. Further details are not provided here.

[0144] Therefore, in method b, the reference phase difference can be used as the reference phase difference of the second transmission line, and phase compensation is performed on the data signal of the first transmission line based on the fluctuating phase difference obtained using the reference phase difference, thereby matching the influence of the two transmission lines on the phase of the data signal and improving the reliability of cooperation between multiple radio units.

[0145] The preceding text describes two methods for determining the reference phase difference. In this embodiment of the present application, the reference phase difference may be a phase difference of a first transmission line or another transmission line, which is either pre-configured, generated based on a clock source of baseband unit #1, or obtained by measurement in another manner. This is not particularly limited in the present application.

[0146] In this embodiment of the present application, phase compensation of the data signal in the first transmission line may be performed by baseband unit #1 or by radio unit #1. The following describes a method by which baseband unit #1 or radio unit #1 adjusts the data signal. Method A is a method in which baseband unit #1 adjusts the data signal, and Method B is a method in which radio unit #1 adjusts the data signal.

[0147] In some scenarios, based on different design divisions of operation between wireless unit #1 and baseband unit #1, for example, eCPRIIt should be noted that in the transmission protocol, some baseband processing may be performed by radio unit #1 or by baseband unit #1 alone. Phase compensation for the data signal on the first transmission line may also be performed jointly by baseband unit #1 and radio unit #1. The method of joint compensation may be the same as that of methods A and B below, which will not be described again here.

[0148] Method A: S540A: Baseband unit #1 adjusts the data signal of the first transmission line.

[0149] It can be understood that the data signal of the first transmission line includes a data signal transmitted by baseband unit #1 to radio unit #1 and a data signal transmitted by radio unit #1 to baseband unit #1.

[0150] In possible embodiments, baseband unit #1 may adjust the data signal of the first transmission line based on the measured phase difference.

[0151] In another possible embodiment, baseband unit #1 may adjust the data signal of the first transmission line based on the aforementioned fluctuating phase difference.

[0152] The following is a general explanation of how baseband unit #1 adjusts the data signal based on phase difference (measured phase difference or fluctuating phase difference).

[0153] Method 1: Baseband unit #1 adjusts the frequency domain information corresponding to the data signal based on the phase difference.

[0154] For example, baseband unit #1 converts the phase difference into at least one frequency, specifically that at least one frequency Number Each frequency Number Determine the phase change and its frequency Number The corresponding phase change at each frequency Number Superposition is permitted. At least one frequency The number , by the system finger A predetermined arbitrary frequency Number It may be present. For example, at least one frequency The number , frequency established by wireless unit #1 Number It may be present. This is not particularly limited in this application.

[0155] Baseband unit #1 is the frequency corresponding to the phase difference (i.e., the measurement frequency of the first signal and the second signal) and Another The transformation may be performed based on a proportional relationship with frequency. For example, the phase difference for a frequency of 122.88 MHz. 122.88MHz However, phase difference: phase 4.9GHz =(4.9G / 122.88MHz)phase 122.88MHz To obtain a 4.9GHz frequency Number It will be converted.

[0156] In possible embodiments, two adjacent frequencies Several hours If the difference between the converted phase differences is less than a certain threshold, baseband unit #1 will... Number The same phase difference may be compensated for. This same phase difference may be one of the two transformed phase differences. Therefore, the amount of compensation computation can be reduced, and the efficiency of adjusting the data signal can be improved.

[0157] Method 2: Baseband unit #1 adjusts the time-domain information corresponding to the data signal based on the phase difference.

[0158] For example, baseband unit #1 may superimpose a corresponding phase difference at each of at least one acquisition point. The at least one acquisition point may be any acquisition point set by the system. This is not particularly limited in this application.

[0159] Method 3: Baseband unit #1 adjusts the clock information based on the phase difference, and this clock information is used to transmit data signals.

[0160] For example, the baseband unit may adjust the phase carried by the local clock source so that the phase of the data signal transmitted based on the local clock source is compensated for.

[0161] Therefore, in method A, baseband unit #1 may perform phase compensation on the data signal of the first transmission line based on the measured phase difference or the fluctuating phase difference.

[0162] Method B: S541B: Baseband unit #1 transmits phase information to radio unit #1, and in response, radio unit #1 receives phase information from baseband unit #1.

[0163] Phase information indicates the measured phase difference or the fluctuating phase difference.

[0164] In possible embodiments, phase information further indicates that wireless unit #1 adjusts the data signals of the first transmission line.

[0165] For example, the phase information may explicitly indicate a measured phase difference or a fluctuating phase difference used to adjust the data signal. For example, the phase information may include the value of the measured phase difference or the fluctuating phase difference. Alternatively, the phase information may indirectly or implicitly indicate a measured phase difference or a fluctuating phase difference used to adjust the data signal. For example, the phase information may include the values ​​of a first phase and a second phase so that radio unit #1 can determine a measured phase difference based on a first phase and a second phase. In another example, the phase information may include a first phase, a second phase, and a reference phase difference so that radio unit #1 can determine a fluctuating phase difference based on a first phase, a second phase, and a reference phase difference. When radio unit #1 preconfigures several phase values, for example, when radio unit #1 preconfigures a first phase, it can be understood that the phase information does not need to include the first phase. In another example, when radio unit #1 preconfigures a reference phase difference, the phase information does not need to include the reference phase difference, which can save transmission resources.

[0166] In possible embodiments, the baseband unit # 1 is The baseband unit #1 may process the measured phase difference or the fluctuating phase difference, and then transmit the processed measured phase difference or the processed fluctuating phase difference to the radio unit #1. For example, if the radio unit #1 may adjust the frequency domain information of the data signal in method 1, the baseband unit #1 may send the measured phase difference or the fluctuating phase difference to at least one frequency Number Convert and each frequency Number Corresponding information may be generated. Phase information is at least one frequency Number Includes corresponding information and at least one frequency Number The information corresponding to each is frequency Number This shows the phase compensation amount. Therefore, the processing complexity required to perform phase compensation by wireless unit #1 can be reduced.

[0167] In possible embodiments, baseband unit #1 may transmit phase information in a timestamp format. In other words, the phase information may indicate a measured phase difference or a fluctuating phase difference using a timestamp. An example in which the phase information includes a value of the fluctuating phase difference is used for illustrative purposes. Different time positions within a time unit are set to represent different phase values. For example, in a time unit period The time mark is set to 10ms, and a time mark at the 1ms position in the time unit indicates a phase difference of 5 degrees, a time mark at the 2ms position in the time unit indicates a phase difference of 10 degrees, and so on. The time marks may be a single defined bit or specific data. This is not particularly limited in this application. Thus, baseband unit #1 transmits phase information in a timestamp manner, thereby saving transmission resources.

[0168] S542B: Wireless unit #1 adjusts the data signal of the first transmission line based on phase information.

[0169] Wireless unit #1 may adjust the data signal of the first transmission line based on the measured phase difference or the fluctuating phase difference. The method by which wireless unit #1 adjusts the data signal is the same as the method by which baseband unit #1 adjusts the data signal in step S540A. Details will not be explained again here.

[0170] Based on the technical solution shown in Figure 5, the phase of the first signal transmitted by baseband unit #1 in the first transmission line is the first phase, and the phase of the second signal received in the first transmission line is the second phase. The second signal is generated by radio unit #1 based on the first signal, and the phase difference between the first phase and the second phase indicates the effect of two bidirectional transmissions on the phase of the first transmission line. Therefore, the first and second phases can be used to adjust the data signal in the first transmission line, thereby improving the reliability of data signal transmission in the first transmission line.

[0171] In the technical solution shown in Figure 5, it can be understood that baseband unit #1 initiates a phase measurement between baseband unit #1 and radio unit #1 to obtain a first phase of a first signal being transmitted and a second phase of a second signal being received. In possible embodiments, the phase measurement may be initiated by radio unit #1. Specifically, radio unit #1 transmits a first signal to baseband unit #1, baseband unit #1 transmits a second signal to radio unit #1 based on the first signal, and radio unit #1 obtains a first phase of the transmitted first signal and a second phase of the received second signal. The first and second phases may be used by baseband unit #1 or radio unit #1 to perform phase compensation on the data signal of the first transmission line. This embodiment is similar to the embodiment described in Figure 5. Details are again not described here.

[0172] The above describes the adjustment of data signals in the first transmission path between baseband unit #1 and radio unit #1. In possible embodiments, phase differences and phase variations may also occur with respect to data signals in a third transmission path between radio unit #1 and radio unit #2. The following describes a method for adjusting data signals between different radio units, with reference to Figure 7.

[0173] Figure 7 is a schematic flowchart of a method for communication between different wireless units according to one embodiment of the present application.

[0174] S710: Wireless unit #1 transmits the seventh signal to wireless unit #2, and in response, wireless unit #2 receives the seventh signal from wireless unit #1.

[0175] Wireless unit #1 and wireless unit #2 can communicate with each other using the cascade connection method shown in Figure 3, and the transmission path between wireless unit #1 and wireless unit #2 may be called a third transmission path.

[0176] The phase of the seventh signal transmitted by wireless unit #1 is the seventh phase.

[0177] The method by which wireless unit #1 transmits the seventh signal to wireless unit #2 is the same as the method by which baseband unit #1 transmits the first signal to wireless unit #1 in step S510 of Figure 5. Further details will not be explained here.

[0178] S720: Radio unit #2 transmits an eighth signal to radio unit #1 based on the seventh signal, and in response, radio unit #1 receives the eighth signal from radio unit #2.

[0179] wireless The phase of the eighth signal received by unit #1 is the eighth phase. The method by which radio unit #2 transmits the eighth signal to radio unit #1 is the same as the method by which radio unit #1 transmits the second signal to baseband unit #1 in step S520 of Figure 5. Details will not be explained here again.

[0180] Optionally, in S730, wireless unit #1 acquires the reference phase difference.

[0181] The method by which wireless unit #1 acquires the reference phase difference is the same as the method by which baseband unit #1 acquires the reference phase difference in step S530 of Figure 5 and the method by which baseband unit #1 acquires the reference phase difference in Figure 6. Details will not be explained again here.

[0182] The seventh and eighth phases may be used to adjust the data signal of the third transmission line. For example, the measured phase difference between the seventh and eighth phases may be used to perform phase compensation on the data signal of the third transmission line. In another example, a variable phase difference may be generated based on the seventh phase, the eighth phase, and a reference phase difference, and this variable phase difference may be used to perform phase compensation on the data signal of the third transmission line. Adjusting the data signal of the third transmission line may be performed by radio unit #1, radio unit #2, or baseband unit #1. Baseband unit #1 is a baseband unit that can communicate with radio unit #1 and radio unit #2. Three methods are described below with examples.

[0183] Method α: S740α: Wireless unit #1 adjusts the data signal of the third transmission line based on the seventh and eighth phases.

[0184] The method of adjusting the data signal by wireless unit #1 is the same as the method of adjusting the data signal in step S540A of Figure 5. Details will not be explained again here.

[0185] Method β: S741β: Wireless unit #1 transmits phase information to wireless unit #2, and in response, wireless unit #2 receives phase information from wireless unit #1.

[0186] The phase information indicates the measured phase difference between the seventh phase and the eighth phase, or the fluctuating phase difference based on the difference between the seventh phase, the eighth phase, and a reference phase difference. The method by which radio unit #1 transmits the phase information to radio unit #2 is the same as the method by which baseband unit #1 transmits the phase information to radio unit #1 in step S541B of Figure 5. Further details are not provided here.

[0187] S742β: Wireless unit #2 adjusts the data signal of the third transmission line based on the fluctuating information.

[0188] The method of adjusting the data signal by wireless unit #2 is the same as the method of adjusting the data signal in step S540A of Figure 5. Details will not be explained again here.

[0189] Method γ: S741γ: Radio unit #1 transmits phase information to baseband unit #1, and in response, baseband unit #1 receives phase information from radio unit #1.

[0190] The phase information indicates the measured phase difference between the seventh phase and the eighth phase, or the fluctuating phase difference based on the difference between the seventh phase, the eighth phase, and a reference phase difference. The method by which radio unit #1 transmits the phase information to baseband unit #1 is the same as the method by which baseband unit #1 transmits the phase information to radio unit #1 in step S541B of Figure 5. Further details are not provided here.

[0191] S742γ: Baseband unit #1 adjusts the data signal of the third transmission line based on the variation information.

[0192] The method of adjusting the data signal using baseband unit #1 is the same as the method of adjusting the data signal in step S540A of Figure 5. Further details will not be explained here.

[0193] Based on the technical solution shown in Figure 7, the phase of the seventh signal transmitted by radio unit #1 in the third transmission line is the seventh phase, and the phase of the eighth signal received in the third transmission line is the eighth phase. The eighth signal is generated by radio unit #2 based on the seventh signal, and the phase difference between the seventh phase and the eighth phase indicates the effect of two bidirectional transmissions on the phase of the third transmission line. Therefore, the seventh and eighth phases can be used to adjust the data signal in the third transmission line, thereby improving the reliability of data signal transmission in the third transmission line.

[0194] In possible embodiments, multiple baseband units may cooperate with each other, and phase differences and phase variations may also occur with respect to the data signals of a fourth transmission line between baseband unit #1 and baseband unit #2. The following describes a method for coordinating data signals between different baseband units with reference to Figure 8.

[0195] Figure 8 is a schematic flowchart of a method for communication between different baseband units according to one embodiment of the present application.

[0196] S810: Baseband unit #1 transmits the ninth signal to baseband unit #2, and in response, baseband unit #2 receives the ninth signal from baseband unit #1.

[0197] Baseband unit #1 and baseband unit #2 can communicate with each other using the connection method shown in Figure 3. The transmission path between baseband unit #1 and baseband unit #2 may be called a fourth transmission path.

[0198] The phase of the ninth signal transmitted by baseband unit #1 is the ninth phase.

[0199] In the method in which baseband unit #1 transmits the ninth signal to baseband unit #2, in step S510 of Figure 5, baseband unit #1 transmits the first signal wireless The method is the same as that used to send to unit #1. Further details will not be explained here.

[0200] S820: Baseband unit #2 transmits a tenth signal to baseband unit #1 based on the ninth signal, and in response, baseband unit #1 receives the tenth signal from baseband unit #2.

[0201] The phase of the tenth signal received by baseband unit #1 is the tenth phase. The method by which baseband unit #2 transmits the tenth signal to baseband unit #1 is shown in step 520 of Figure 5. wireless This is similar to the method in which unit #1 transmits the second signal to baseband unit #1. Further details will not be explained here.

[0202] Optionally, in S830, baseband unit #1 acquires the reference phase difference.

[0203] The method by which baseband unit #1 acquires the reference phase difference is the same as the method by which baseband unit #1 acquires the reference phase difference in step S530 in Figure 5 and the method by which baseband unit #1 acquires the reference phase difference in Figure 6. Details will not be explained again here.

[0204] S840: Baseband unit #1 or baseband unit #2 adjusts the data signal of the fourth transmission line based on the ninth and tenth phases.

[0205] The ninth and tenth phases may be used to adjust the data signal of the fourth transmission line. For example, the measured phase difference between the eighth and tenth phases may be used to perform phase compensation on the data signal of the fourth transmission line. In another example, a variable phase difference may be generated based on the ninth phase, the tenth phase, and the reference phase difference, and this variable phase difference may be used to perform phase compensation on the data signal of the fourth transmission line. Adjusting the data signal of the fourth transmission line may be performed by baseband unit #1 or baseband unit #2. The method of execution is similar to that of steps S540A, S541B, and S542B in Figure 5. Details are not described again here.

[0206] Based on the technical solution shown in Figure 8, the phase of the ninth signal transmitted by baseband unit #1 on the fourth transmission line is the ninth phase, and the phase of the tenth signal received on the fourth transmission line is the tenth phase. The tenth signal is generated by baseband unit #2 based on the ninth signal, and the phase difference between the ninth phase and the tenth phase indicates the effect of two bidirectional transmissions on the phase of the fourth transmission line. Therefore, the ninth phase and the tenth phase can be used to adjust the data signal on the fourth transmission line, thereby improving the reliability of data signal transmission on the fourth transmission line.

[0207] To facilitate understanding of the embodiments of this application, the signal transmission method will be described below with reference to Figure 9, using an example in which the first signal and the second signal are transmitted and received between the first and second devices in the manner shown in Figure 5.

[0208] Figure 9 is an explanatory diagram of signal transmission between the baseband unit and the wireless unit.

[0209] Please refer to Figure 9. The first device performs baseband processing on the downlink data signal to generate the first signal. CPRI The processed data signal can be packaged based on the local clock according to the protocol. The first signal carries the initial phase of the local clock (i.e., the first phase), and the first device transmits the first signal to the second device using a serializer. The second device receives the first signal using a deserializer. CPRI According to the protocol, the clock signal and data signal are recovered from the first signal. The recovered clock signal can be phase-locked to the received first signal using a phase-locked loop, and the uplink data signal is generated based on the recovered clock signal and the radio frequency processed uplink data signal to generate the second signal. CPRIIt can be packaged according to the protocol. The second signal carries the phase of the first signal received by the second device, and the second device transmits the second signal to the first device using a serializer. The first device receives the second signal using a deserializer. CPRI The clock signal and data signal are recovered from the second signal according to the protocol. The recovered clock signal carries the second phase of the second signal received by the first device, so that the first and second phases can be used to adjust the data signal transmitted between the first and second devices. In addition, the downlink data signal recovered by the radio unit and the uplink data signal recovered by the baseband unit are not affected by the measurement process; that is, the technical solution cannot affect the normal operation of the service data signal.

[0210] The method provided in the embodiments of this application is described in detail above with reference to Figures 5 to 9. The apparatus provided in the embodiments of this application is described in detail below with reference to Figures 10 and 11. Please understand that the description of the apparatus embodiments corresponds to the description of the method embodiments. Therefore, for matters not described in detail, please refer to the method embodiments described above. For brevity, further details will not be described here.

[0211] Figures 10 and 11 are schematic diagrams of possible apparatus structures according to embodiments of the present application. These apparatuses may be configured to implement the functions of the first apparatus (e.g., baseband unit #1) and the second apparatus (e.g., radio unit #1) in the embodiments of the method described above, and thus may also implement the beneficial effects of the embodiments of the method described above. In embodiments of the present application, the apparatus may be the first apparatus or the second apparatus, or a module (e.g., a chip) used in the first apparatus or the second apparatus.

[0212] As shown in Figure 10, the apparatus 1000 includes a processing module 1010 and a transceiver module 1020. The apparatus 1000 is configured to implement the functions of the first and second apparatuses in the embodiment of the method shown in Figure 5. Alternatively, the apparatus 1000 may include modules configured to implement any function or operation of the first or second apparatuses in the embodiment of the method shown in Figure 5, and these modules may be implemented holistically or partially using software, hardware, firmware, or any combination thereof.

[0213] When the device 1000 is configured to perform the functions of the first device in the embodiment of the method shown in Figure 5, the processing module 1010 is configured to generate a first signal, the transceiver module 1020 is configured to transmit the first signal to the second device such that the phase of the first signal transmitted by the first device is a first phase, the transceiver module 1020 is configured to receive a second signal from the second device such that the second signal and the first signal are two signals whose transmission directions are opposite in the first transmission line, the phase of the second signal received by the first device is a second phase, and the first phase and the second phase are used to adjust the data signal in the first transmission line.

[0214] Based on this technical solution, the phase of the first signal transmitted by the first device on the first transmission line is the first phase, and the phase of the second signal received on the first transmission line is the second phase. The second signal is generated by the second device based on the first signal, and the phase difference between the first phase and the second phase indicates the effect of two bidirectional transmissions on the phase of the first transmission line. Therefore, the first and second phases can be used to adjust the data signal on the first transmission line, thereby improving the reliability of data signal transmission on the first transmission line.

[0215] For a more detailed description of the processing module 1010 and the transceiver module 1020, please refer directly to the relevant descriptions of the embodiments of the method shown in Figures 5 to 8. Further details are not provided here.

[0216] Device 1000 However, when configured to realize the function of the second device in the embodiment of the method shown in Figure 5, the transceiver module 1020 is configured to receive a first signal from the first device, the processing module 1010 is configured to generate a second signal, and the first and second signals are used to adjust the data signal on the first transmission line, the transceiver module 1020 is further configured to transmit a second signal, and the second and first signals are two signals whose transmission directions are opposite on the first transmission line, and the phase of the second signal transmitted by the transceiver unit is determined based on the phase of the first signal received by the transceiver unit.

[0217] Based on this technical solution, the phase of the first signal transmitted by the first device on the first transmission line is the first phase, and the phase of the second signal received on the first transmission line is the second phase. The second signal is generated by the second device based on the first signal, and the phase difference between the first phase and the second phase indicates the effect of two bidirectional transmissions on the phase of the first transmission line. Therefore, the first and second phases can be used to adjust the data signal on the first transmission line, thereby improving the reliability of data signal transmission on the first transmission line.

[0218] For a more detailed description of the processing module 1010 and the transceiver module 1020, please refer directly to the relevant description of the embodiment of the method shown in Figure 5. Further details are not provided here.

[0219] As shown in Figure 11, the device 1100 includes a processor 1110 and optionally further includes an interface circuit 1120. The processor 1110 and the interface circuit 1120 are coupled to each other. It can be understood that the interface circuit 1120 may be a transceiver or an input / output interface. Optionally, the device 1100 may further include a memory 1130 for storing instructions executed by the processor 1110, or input data required by the processor 1110 to operate the instructions, or data generated after the processor 1110 has operated the instructions.

[0220] When the device 1100 is configured to implement the functions of the first device in the embodiment of the method shown in Figures 5 and 6, the processor 1110 is configured to implement the functions of the processing module 1010 described above, and the interface circuit 1120 is configured to implement the functions of the transceiver module 1020 described above.

[0221] When the device 1100 is configured to perform the functions of the second device in the embodiment of the method shown in Figures 5 and 6, the processor 1110 performs the aforementioned processing. Module 1010 The interface circuit 1120 is configured to implement the functions of the transceiver module 1020 described above.

[0222] The processor in the embodiments of this application may be a Central Processing Unit (CPU), another general-purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), another programmable logic device, a transistor logic device, a hardware component, or any combination thereof. The general-purpose processor may be a microprocessor or any ordinary processor, etc.

[0223] In embodiments of this application, the memory may be Random Access Memory (RAM), flash memory, Read-Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (Erasable PROM, EPROM), Electrically Erasable Programmable Read-Only Memory (Electrically Erasable EPROM, EEPROM), registers, hard disk drives, removable hard disk drives, CD-ROMs, or any other form of storage medium known in the art. For example, the 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 may be a component of the processor. The processor and storage medium may be located in an ASIC. In addition, the ASIC may be located in a network device or a terminal device. Of course, the processor and storage medium may also exist as separate components within a network device or a terminal device.

[0224] All or part of the embodiments described above may be implemented using software, hardware, firmware, or any combination thereof. When software is used to implement the embodiments, all or part of the embodiments may be implemented in the form of a computer program product. A computer program product includes one or more computer programs and instructions. When a computer program or instruction is loaded and executed on a computer, the procedure or function in the embodiments of this application is performed in whole or in part. The computer may be a general-purpose computer, a dedicated computer, a computer network, a network device, a terminal device, or another programmable device. The computer program or instruction may be stored on or transmitted by a computer-readable storage medium. The computer-readable storage medium may be any available medium accessible by a computer, or a data storage device such as a server incorporating one or more available media. The available media may be magnetic media, such as floppy disks, hard disk drives, or magnetic tapes; optical media, such as DVDs; or semiconductor media, such as solid-state disks (SSDs).

[0225] In the embodiments of this application, unless otherwise stated or unless there is a logical inconsistency, the terminology and / or descriptions between different embodiments are consistent and can be referenced to one another, and technical features in different embodiments can be combined on the basis of their internal logical relationships to form a new embodiment.

[0226] In the embodiments of this application, the numbers "first" and "second," etc., are merely used to distinguish different objects, for example, to distinguish different network devices, and are not within the scope of the embodiments of this application. Nothing It should be understood that this does not constitute a limitation. The embodiments of this application are not limited thereto.

[0227] In this application, both "when" and "in case" mean that a network element performs the corresponding processing in an objective situation, but in relation to time. Nothing It should be further understood that this does not constitute a limitation, does not require network elements to have decision actions during implementation, and does not imply any other limitations.

[0228] In the embodiments of this application, “B corresponding to A” should be further understood to indicate that B is related to A and that B may be determined based on A. However, it should be further understood that determining B based on A does not mean that B is determined solely based on A. B may, or may, be determined based on A and / or other information.

[0229] In this specification, the terms "and / or" describe only the relational relationship used to describe the related objects, and it should be understood that there may be three possible relationships. For example, A and / or B can represent the following three cases: A exists only, both A and B exist, and B exists only. In addition, the symbol " / " in this specification generally indicates an "or" relationship between related objects.

[0230] In the embodiments of this application, it should be further understood that “indication” may include direct and indirect indications, or explicit and implicit indications. Information indicated by a particular message (e.g., phase information below) is referred to as indicated information. In a particular implementation process, indicated information may be indicated in several ways, for example, by directly indicating the indicated information, or by indicating the indicated information or an index of the indicated information, for example. Alternatively, indicated information may be indicated indirectly by indicating other information, and there is a correlation between the other information and the indicated information. Alternatively, only a portion of the indicated information may be indicated, and the other portion of the indicated information may be known or pre-agreed upon. For example, particular information may be indicated using a pre-agreed arrangement order of each piece of information, thereby reducing the indication overhead to some extent.

[0231] Unless otherwise specified, expressions used in this application, such as “the item includes one or more of the following, namely A, B, and C,” generally mean that the item may be any one of the following, namely A, B, C, A and B, A and C, B and C, A and B and C, A and A, A and A and A, A and A and B, A and A and C, A and B and B, A and C and C, B and B, B and B and B, B and B and C, C and C, C and C and C, and any other combination of A, B, and C. In the above description, the three elements A, B, and C are used as examples to illustrate the case of arbitrary selection of the item. When the expression is “the item includes at least one of the following, namely A, B, ..., and X,” in other words, when more elements are included in the expression, the cases in which the item is applicable can also be obtained according to the above rules.

[0232] It should be understood that the various numbers in the embodiments of this application are used merely for distinction to simplify the explanation and are not used to limit the scope of the embodiments of this application. The sequence numbers of the processes described above do not imply an execution order. The execution order of the processes should be determined based on the function and internal logic of the processes. [Explanation of symbols]

[0233] 1 signal 2 signals 3 signals 110 Wireless Unit 111 Wireless Unit 111 Baseband Unit 112 Wireless Unit 113 Wireless Unit 114 Wireless Unit 120 Baseband Unit 121 Baseband Unit 122 Baseband Unit 123 Baseband Unit 124 Baseband Unit 520 steps 700 equipment 1000 devices 1010 Processing Module 1020 Transceiver Module 1100 equipment 1110 processor 1110 Processing Unit 1120 Interface Circuit 1130 memory

Claims

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 step 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. Methods that include...

2. The aforementioned method, A 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. The method according to claim 1, further comprising:

3. The phase information indicates a measured phase difference, and the measured phase difference is determined based on the first phase and the second phase, or The method according to claim 2, wherein the phase information indicates a fluctuating phase difference, and 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, Steps to adjust the data signal based on the first phase and the second phase. The method according to claim 1, further comprising:

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, A step of adjusting the time-domain phase information corresponding to the data signal based on the first phase and the second phase, or A step of adjusting clock information based on the first phase and the second phase, wherein the clock information is used to transmit the data signal. The method according to claim 6, including the method described in claim 6.

8. The step of transmitting phase information to the second device is: Steps include transmitting the phase information to the second device via a first interface, wherein the first interface is one of the following interfaces: a common public radio interface (CPRI) or an extended common public radio interface (eCPRI). The method according to claim 2, including the method described in claim 2.

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 step 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 the first transmission path, 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 path. Methods that include...

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. A step of adjusting the data signal of the first transmission line based on the phase information. The method according to claim 9, further comprising:

11. The phase information indicates a measured phase difference, which is determined based on the first phase of the first signal transmitted by the first device and the second phase of the second signal received by the first device, or The method according to claim 10, wherein the phase information indicates a fluctuating phase difference, and the fluctuating phase difference is determined based on the measured phase difference and the 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, A step of adjusting the time-domain phase information corresponding to the data signal based on the phase information, or A step of adjusting clock information based on the phase information, wherein the clock information is used to transmit the data signal. The method according to claim 10, including the method described in claim 10.

15. The step of receiving phase information from the first device is: Steps include receiving the phase information from the first device via a first interface, wherein the first interface is one of the following interfaces: a common public radio interface (CPRI) or an extended common public radio interface (eCPRI). The method according to claim 9, including the method described in claim 9.

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 according to any one of claims 1 to 8.

21. A computer program comprising instructions, wherein when the instructions are executed in a computer, the computer is enabled to perform the method according to any one of claims 9 to 15.

22. A computer-readable storage medium containing a computer program, wherein when the computer program is running on a computer, the computer is enabled to perform the method according to any one of claims 1 to 8.

23. A computer-readable storage medium containing a computer program, wherein when the computer program is running on a computer, the computer is enabled to perform the method according to any one of claims 9 to 15.

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