Downlink transmission method and apparatus

Abstract

An embodiment of the present application provides a downlink transmission method and apparatus. According to the method provided in the present application, a control device determines a serving radio frequency device of a terminal device configured to receive the target downlink data, and sends indication information to an extension device, where the indication information indicates a radio frequency device configured to convey the target downlink data, and the radio frequency device configured to convey the target downlink data is the serving radio frequency device of the terminal device configured to receive the target downlink data. The extension device can transmit the target downlink data to the radio frequency device configured to convey the target downlink data based on the indication information, or the extension device sends an instruction to the radio frequency device configured to convey the target downlink data to instruct it to transmit the target downlink data, and / or sends an instruction to the radio frequency device not configured to convey the target downlink data to instruct it not to transmit the target downlink data. This helps to realize that the radio frequency device not configured to convey the target downlink data does not transmit the target downlink data, so that invalid transmission is avoided.

Description

[Technical field]

[0001] This application claims priority to Chinese Patent Application No. 202111661486.X, entitled "DOWNLINK TRANSMISSION METHOD AND APPARATUS", filed with the State Intellectual Property Office of the People's Republic of China on December 31, 2021, which is incorporated herein by reference in its entirety.

[0002] FIELD OF THE DISCLOSURE The embodiments of the present application relate to the field of communications, and more particularly, to a downlink transmission method and apparatus. [Background technology]

[0003] With the development of communication technology, indoor areas have become areas with high incidence of mobile services. In the current indoor signal coverage technology, a base station uses a three-layer structure of baseband unit (BBU)-remote radio unit hub (rHUB)-pico-remote radio unit (pRRU). One BBU can be connected to one or more rHUBs, and one rHUB can be connected to multiple pRRUs. In the downlink direction, the BBU can perform baseband processing on the downlink data transmitted to the terminal, and transmit the processed downlink data to the rHUB. After receiving the downlink data, the rHUB duplicates the downlink data into a copy and transmits the copy to the pRRU connected to the rHUB. The pRRU transmits the downlink data to the terminal.

[0004] However, the above downlink transmission schemes may result in ineffective transmissions and may also cause interference to neighboring cells. Summary of the Invention

[0005] The embodiments of the present application provide a downlink transmission method and apparatus to avoid invalid downlink transmission.

[0006] According to a first aspect, a downlink transmission method is provided. The method includes a step of an extension device receiving instruction information from a control device, the instruction information instructing a radio frequency device configured to convey target downlink data, and the radio frequency device configured to convey the target downlink data is a serving radio frequency device of at least one terminal device configured to receive the target downlink data. The extension device receives the target downlink data from the control device. The extension device transmits the target downlink data to the radio frequency device configured to convey the target downlink data based on the instruction information.

[0007] Based on the above technical solution, the control device sends instruction information to the extension device to instruct the extension device to transmit the target downlink data to the radio frequency device configured to transmit the target downlink data, so that only the radio frequency device configured to receive the target downlink data can receive the target downlink data. When the radio frequency device not configured to transmit the target downlink data cannot receive the target downlink data, invalid transmission can be avoided, and downlink power consumption can be reduced. When the radio frequency device not configured to transmit the target downlink data is adjacent to another cell, interference to the adjacent cell can be further avoided.

[0008] With reference to the first aspect, in some implementations of the first aspect, the instruction information indicates a radio frequency device configured to communicate the target downlink data in the target time unit.

[0009] Referring to the first aspect, in some implementations of the first aspect, the instruction information instructs at least one radio frequency device configured to convey downlink data in multiple time units, the multiple time units including a target time unit for conveying target downlink data, and the at least one radio frequency device is a serving radio frequency device of at least one terminal device configured to receive the downlink data in the multiple time units.

[0010] According to a second aspect, a downlink transmission method is provided. The method includes a step of an extension device receiving instruction information from a control device, the instruction information instructing a radio frequency device configured to transmit the target downlink data, the radio frequency device configured to transmit the target downlink data being a serving radio frequency device of at least one terminal device configured to receive the target downlink data. The extension device transmits a first instruction to the radio frequency device configured to transmit the target downlink data and / or transmits a second instruction to the radio frequency device not configured to transmit the target downlink data, the first instruction instructing to transmit the target downlink data and the second instruction instructing not to transmit the target downlink data. The extension device receives the target downlink data from the control device. The extension device transmits the target downlink data to the radio frequency device configured to transmit the target downlink data and to the radio frequency device not configured to transmit the target downlink data.

[0011] Based on the above technical solution, the control device sends instruction information to the extended device, so that the extended device can send a first command to the radio frequency device configured to transmit the target downlink data, and / or send a second command to the radio frequency device not configured to transmit the target downlink data. In this way, only the radio frequency device configured to transmit the target downlink data transmits the target downlink data. When the radio frequency device not configured to transmit the target downlink data does not transmit the target downlink data, invalid transmission can be avoided, and downlink power consumption can be reduced. If the radio frequency device not configured to transmit the target downlink data is adjacent to another cell, interference to the adjacent cell can be further avoided.

[0012] Referring to the second aspect, in some implementations of the second aspect, the instruction information instructs a radio frequency device to convey the intended downlink data in the intended time unit.

[0013] With reference to the second aspect, in some implementations of the second aspect, the first instruction instructs to transmit target downlink data communicated in the target time unit, and the second instruction instructs not to transmit the target downlink data communicated in the target time unit.

[0014] Referring to the second aspect, in some implementations of the second aspect, the instruction information indicates at least one radio frequency device configured to convey downlink data in multiple time units, the multiple time units including a target time unit for conveying the target downlink data, and the at least one radio frequency device is a serving radio frequency device of at least one terminal device configured to receive the downlink data in the multiple time units, and the method further includes a step of the extended device determining, based on the instruction information, a radio frequency device configured to convey the target downlink data and / or a radio frequency device not configured to convey the target downlink data.

[0015] Referring to the second aspect, in some implementations of the second aspect, the instruction information instructs at least one radio frequency device configured to communicate downlink data in multiple time units, the multiple time units including a target time unit for communicating the target downlink data, the at least one radio frequency device being a serving radio frequency device of at least one terminal device configured to receive the downlink data in the multiple time units, and the augmented device sending a first instruction to the radio frequency device configured to communicate the target downlink data and / or sending a second instruction to the radio frequency device not configured to communicate the target downlink data includes the augmented device sending an instruction to a connected radio frequency device, the instruction instructing whether to transmit the downlink data communicated in the multiple time units.

[0016] According to a third aspect, a downlink transmission method is provided. The method includes a step of a radio frequency device receiving an instruction from an extension device, the instruction instructing whether to transmit target downlink data. The radio frequency device receives the target downlink data from the extension device. The radio frequency device determines whether to transmit the target downlink data according to the instruction.

[0017] Based on the above technical solution, the radio frequency device judges whether to transmit the target downlink data according to the instruction. This helps to realize that only the serving radio frequency device of the terminal device configured to receive the target downlink data transmits the target downlink data. If the radio frequency device not configured to transmit the target downlink data does not transmit the target downlink data, invalid transmission can be avoided and downlink power consumption can be reduced. If the radio frequency device not configured to transmit the target downlink data is adjacent to another cell, interference to the adjacent cell can be further avoided.

[0018] With reference to the third aspect, in some implementations of the third aspect, the instructions instruct transmitting the target downlink data conveyed in the target time unit.

[0019] With reference to the third aspect, in some implementations of the third aspect, the instruction instructs whether to transmit downlink data communicated in multiple time units, the multiple time units including a target time unit communicating target downlink data.

[0020] According to a fourth aspect, a downlink transmission method is provided, the method including a step of a control device determining a serving radio frequency device of at least one terminal device configured to receive target downlink data, the control device transmitting indication information to an extension device, the indication information indicating a radio frequency device configured to convey the target downlink data, the radio frequency device configured to convey the target downlink data being the serving radio frequency device of the at least one terminal device configured to receive the target downlink data.

[0021] Based on the above technical solution, the control device determines a serving radio frequency device of a terminal device configured to receive the target downlink data, and sends indication information to the extension device. Based on the indication information, the extension device can transmit the target downlink data to the radio frequency device configured to transmit the target downlink data, or the extension device sends an instruction to instruct the radio frequency device configured to transmit the target downlink data to transmit the target downlink data, and / or sends an instruction to instruct the radio frequency device not configured to transmit the target downlink data not to transmit the target downlink data. This helps to realize that the radio frequency device not configured to transmit the target downlink data does not transmit the target downlink data, so that invalid transmission is avoided and downlink power consumption is reduced.

[0022] With reference to the fourth aspect, in some implementations of the fourth aspect, the instruction information indicates a radio frequency device configured to communicate the target downlink data in the target time unit.

[0023] With reference to the fourth aspect, in some implementations of the fourth aspect, the step of the control device determining a serving radio frequency device of at least one terminal device configured to receive target downlink data includes a step of the control device determining a serving radio frequency device of at least one terminal device configured to receive downlink data communicated in a plurality of time units, wherein the plurality of time units includes a target time unit for communicating the target downlink data, and the instruction information indicates at least one radio frequency device configured to communicate the downlink data in the plurality of time units, and the at least one radio frequency device is the serving radio frequency device of the at least one terminal device configured to receive the downlink data in the plurality of time units.

[0024] Referring to the fourth aspect, in some implementations of the fourth aspect, the method further includes a step in which the control device determines a serving radio frequency device of a terminal device configured to receive the target downlink data based on a power of an uplink signal received by each radio frequency device from the terminal device configured to receive the target downlink data.

[0025] Referring to the fourth aspect, in some implementations of the fourth aspect, the method further includes a step of the control device determining a serving radio frequency device of a terminal device configured to receive the target downlink data based on a beam identifier reported by the terminal device configured to receive the target downlink data.

[0026] According to a fifth aspect, an uplink transmission method is provided. The method includes a step of an extension device receiving instruction information from a control device, the instruction information instructing at least one radio frequency device performing a target uplink transmission, the radio frequency device performing the target uplink transmission being a serving radio frequency device of the at least one terminal device performing the target uplink transmission. The extension device receives a signal from the at least one radio frequency device performing the target uplink transmission. The extension device transmits an uplink signal to the control device, the uplink signal being determined based on the signal received from the at least one radio frequency device performing the target uplink transmission.

[0027] Based on the above technical solution, the control device sends instruction information to the extension device to instruct the extension device to report signals received from at least one radio frequency device that performs a target uplink transmission, thereby preventing the extension device from reporting signals received from radio frequency devices that do not perform a target uplink transmission to the control device. Since the extension device does not report signals received from radio frequency devices that do not perform a target uplink transmission, the uplink noise floor and the uplink power consumption can be reduced.

[0028] With reference to the fifth aspect, in some implementations of the fifth aspect, the augmentation device receiving a signal from at least one radio frequency device performing a target uplink transmission includes the augmentation device receiving a signal from at least one radio frequency device performing a target uplink transmission and a signal from a radio frequency device that does not perform a target uplink transmission.

[0029] With reference to the fifth aspect, in some implementations of the fifth aspect, the augmentation device receiving a signal from at least one radio frequency device performing a target uplink transmission includes the augmentation device receiving only a signal from the at least one radio frequency device performing a target uplink transmission. The method further includes a step of the augmentation device transmitting an instruction to the at least one radio frequency device performing the target uplink transmission instructing them to perform the target uplink transmission, and / or a step of transmitting an instruction to the radio frequency device not performing the target uplink transmission instructing them not to perform the target uplink transmission.

[0030] Based on the above technical solution, the control device transmits instruction information to the extension device, so that the extension device can transmit an instruction to a radio frequency device that performs a target uplink transmission to instruct the radio frequency device to perform the target uplink transmission, and / or transmit an instruction to a radio frequency device that does not perform a target uplink transmission to instruct the radio frequency device not to perform the target uplink transmission. In this way, only the radio frequency device that performs the target uplink transmission transmits a signal to the extension device. Therefore, the extension device does not report a signal received from a radio frequency device that does not perform a target uplink transmission to the control device. Since the extension device does not report a signal received from a radio frequency device that does not perform a target uplink transmission, the uplink noise floor and the uplink power consumption can be reduced.

[0031] With reference to the fifth aspect, in some implementations of the fifth aspect, the instruction information instructs at least one radio frequency device to perform uplink transmission in at least one time unit, the at least one time unit including a target time unit in which a target uplink transmission is performed, and the at least one radio frequency device that performs uplink transmission in the at least one time unit is a serving radio frequency device of the at least one terminal device that performs uplink transmission in the at least one time unit.

[0032] According to a sixth aspect, an uplink transmission method is provided. The method includes a step of: a radio frequency device receiving an instruction transmitted by an extension device, the instruction instructing whether to perform a target uplink transmission. The radio frequency device determines whether to perform the target uplink transmission according to the instruction.

[0033] Based on the above technical solution, the radio frequency device judges whether to perform the target uplink transmission according to the instruction. This helps to realize that only the serving radio frequency device of the terminal device that performs the target uplink transmission performs the target uplink transmission. If the serving radio frequency device of the terminal device that does not perform the target uplink transmission does not perform the target uplink transmission, the uplink noise floor and the uplink power consumption can be reduced.

[0034] With reference to the sixth aspect, in some implementations of the sixth aspect, the instruction instructs whether to perform an uplink transmission in at least one time unit, the at least one time unit including a target time unit for performing a target uplink transmission.

[0035] According to a seventh aspect, an uplink transmission method is provided, the method including: a control device determining a serving radio frequency device of at least one terminal device performing a target uplink transmission; the control device transmits instruction information to an extension device, the instruction information instructing the at least one radio frequency device performing the target uplink transmission, and the at least one radio frequency device performing the target uplink transmission is a serving radio frequency device of the at least one terminal device performing the target uplink transmission.

[0036] Based on the above technical solution, the control device determines a serving radio frequency device of a terminal device that performs a target uplink transmission, and sends indication information to the extension device. Based on the indication information, the extension device can report a signal received from the radio frequency device that performs the target uplink transmission, or the extension device sends an instruction to the radio frequency device that performs the target uplink transmission to instruct it to perform the target uplink transmission, and / or sends an instruction to the radio frequency device that does not perform the target uplink transmission to instruct it not to perform the target uplink transmission. This helps to realize that the control device only receives signals transmitted by the radio frequency device that performs the target uplink transmission, so that the uplink noise floor and the uplink power consumption are reduced.

[0037] With reference to the seventh aspect, in some implementations of the seventh aspect, the control device determining a serving radio frequency device of at least one terminal device performing a target uplink transmission includes the control device determining a serving radio frequency device of at least one terminal device performing an uplink transmission in at least one time unit, where the at least one time unit includes a target time unit in which the target uplink transmission is performed, the instruction information instructs the at least one radio frequency device performing the uplink transmission in the at least one time unit, and the at least one radio frequency device performing the uplink transmission in the at least one time unit is the serving radio frequency device of the at least one terminal device performing the uplink transmission in the at least one time unit.

[0038] With reference to the seventh aspect, in some implementations of the seventh aspect, the method further includes a step in which the control device determines a serving radio frequency device of the terminal device performing the target uplink transmission based on the power of an uplink signal received by each radio frequency device from the terminal device performing the target uplink transmission.

[0039] With reference to the seventh aspect, in some implementations of the seventh aspect, the method further includes a step in which the control device determines a serving radio frequency device of the terminal device performing the target uplink transmission based on a beam identifier reported by the terminal device performing the target uplink transmission.

[0040] According to an eighth aspect, an apparatus is provided. The apparatus includes a transceiver unit. The transceiver unit is configured to receive instruction information from a control device, the instruction information instructing a radio frequency device configured to convey target downlink data, the radio frequency device configured to convey the target downlink data being a serving radio frequency device of at least one terminal device configured to receive the target downlink data. The transceiver unit is further configured to receive the target downlink data from the control device. The transceiver unit is further configured to transmit the target downlink data to the radio frequency device configured to convey the target downlink data based on the instruction information.

[0041] With reference to the eighth aspect, in some implementations of the eighth aspect, the instruction information indicates a radio frequency device configured to communicate the target downlink data in the target time unit.

[0042] With reference to the eighth aspect, in some implementations of the eighth aspect, the instruction information instructs at least one radio frequency device configured to convey downlink data in multiple time units, the multiple time units including a target time unit for conveying the target downlink data, and the at least one radio frequency device is a serving radio frequency device of at least one terminal device configured to receive the downlink data in the multiple time units.

[0043] According to a ninth aspect, an apparatus is provided. The apparatus includes a transceiver unit. The transceiver unit is configured to receive instruction information from a control device, the instruction information instructing a radio frequency device configured to communicate the target downlink data, the radio frequency device configured to communicate the target downlink data being a serving radio frequency device of at least one terminal device configured to receive the target downlink data. The transceiver unit is further configured to transmit a first instruction to the radio frequency device configured to communicate the target downlink data and / or transmit a second instruction to the radio frequency device not configured to communicate the target downlink data, the first instruction instructing to transmit the target downlink data and the second instruction instructing not to transmit the target downlink data. The transceiver unit is further configured to receive the target downlink data from the control device. The transceiver unit is further configured to transmit the target downlink data to the radio frequency device configured to communicate the target downlink data and to the radio frequency device not configured to communicate the target downlink data.

[0044] With reference to the ninth aspect, in some implementations of the ninth aspect, the instruction information instructs a radio frequency device to convey the intended downlink data in the intended time unit.

[0045] With reference to the ninth aspect, in some implementations of the ninth aspect, the first instruction instructs to transmit target downlink data communicated in the target time unit, and the second instruction instructs not to transmit the target downlink data communicated in the target time unit.

[0046] With reference to the ninth aspect, in some implementations of the ninth aspect, the instruction information indicates at least one radio frequency device configured to convey downlink data in multiple time units, the multiple time units including a target time unit for conveying the target downlink data, and the at least one radio frequency device is a serving radio frequency device of at least one terminal device configured to receive the downlink data in the multiple time units, and the apparatus further includes a processing unit, and the processing unit is configured to determine, based on the instruction information, the radio frequency device configured to convey the target downlink data and / or the radio frequency device not configured to convey the target downlink data.

[0047] With reference to the ninth aspect, in some implementations of the ninth aspect, the instruction information instructs at least one radio frequency device configured to communicate downlink data in multiple time units, the multiple time units including a target time unit for communicating target downlink data, the at least one radio frequency device being a serving radio frequency device of at least one terminal device configured to receive the downlink data in the multiple time units, and the transceiver unit is further configured to send an instruction to the connected radio frequency device, the instruction instructing whether to transmit the downlink data communicated in the multiple time units.

[0048] According to a tenth aspect, an apparatus is provided. The apparatus includes a transceiver unit and a processing unit. The transceiver unit is configured to receive an instruction from an extension device, the instruction instructing whether to transmit target downlink data. The transceiver unit is further configured to receive the target downlink data from the extension device. The processing unit is configured to determine whether to transmit the target downlink data according to the instruction.

[0049] With reference to the tenth aspect, in some implementations of the tenth aspect, the instructions instruct transmitting the target downlink data communicated in the target time unit.

[0050] With reference to the tenth aspect, in some implementations of the tenth aspect, the instruction instructs whether to transmit downlink data communicated in multiple time units, the multiple time units including a target time unit communicating target downlink data.

[0051] According to an eleventh aspect, an apparatus is provided. The apparatus includes a transceiver unit and a processing unit. The processing unit is configured to determine a serving radio frequency device of at least one terminal device configured to receive the target downlink data. The transceiver unit is configured to transmit indication information to the extension device, the indication information indicating a radio frequency device configured to convey the target downlink data, and the radio frequency device configured to convey the target downlink data is the serving radio frequency device of the at least one terminal device configured to receive the target downlink data.

[0052] With reference to the eleventh aspect, in some implementations of the eleventh aspect, the instruction information indicates a radio frequency device configured to communicate the target downlink data in the target time unit.

[0053] Referring to the eleventh aspect, in some implementations of the eleventh aspect, the processing unit is further configured to determine a serving radio frequency device of at least one terminal device configured to receive downlink data communicated in multiple time units, the multiple time units including a target time unit for communicating the target downlink data, the instruction information instructs the at least one radio frequency device configured to communicate the downlink data in the multiple time units, and the at least one radio frequency device is a serving radio frequency device of the at least one terminal device configured to receive the downlink data in the multiple time units.

[0054] With reference to the eleventh aspect, in some implementations of the eleventh aspect, the processing unit is further configured to determine a serving radio frequency device of a terminal device configured to receive the target downlink data based on a power of an uplink signal received by each radio frequency device from the terminal device configured to receive the target downlink data.

[0055] With reference to the eleventh aspect, in some implementations of the eleventh aspect, the processing unit is further configured to determine a serving radio frequency device of a terminal device configured to receive the target downlink data based on a beam identifier reported by the terminal device configured to receive the target downlink data.

[0056] According to a twelfth aspect, an apparatus is provided. The apparatus includes a transceiver unit. The transceiver unit is configured to receive instruction information from a control device, the instruction information instructing at least one radio frequency device performing a target uplink transmission, the radio frequency device performing the target uplink transmission being a serving radio frequency device of the at least one terminal device performing the target uplink transmission. The transceiver unit is further configured to receive a signal from the at least one radio frequency device performing the target uplink transmission. The transceiver unit is further configured to transmit an uplink signal to the control device, the uplink signal being determined based on the signal received from the at least one radio frequency device performing the target uplink transmission.

[0057] With reference to the twelfth aspect, in some implementations of the twelfth aspect, the transceiver unit is further configured to receive a signal from at least one radio frequency device performing a target uplink transmission and a signal from a radio frequency device not performing a target uplink transmission.

[0058] With reference to the twelfth aspect, in some implementations of the twelfth aspect, the transceiver unit is further configured to receive only a signal from at least one radio frequency device performing a target uplink transmission, and the transceiver unit is further configured to transmit an instruction to the at least one radio frequency device performing the target uplink transmission, instructing the device to perform the target uplink transmission, and / or transmit an instruction to the radio frequency device not performing the target uplink transmission, instructing the device not to perform the target uplink transmission.

[0059] With reference to the twelfth aspect, in some implementations of the twelfth aspect, the instruction information instructs at least one radio frequency device to perform uplink transmission in at least one time unit, the at least one time unit including a target time unit in which a target uplink transmission is performed, and the at least one radio frequency device that performs uplink transmission in the at least one time unit is a serving radio frequency device of the at least one terminal device that performs uplink transmission in the at least one time unit.

[0060] According to a thirteenth aspect, an apparatus is provided. The apparatus includes a transceiver unit and a processing unit. The transceiver unit is configured to receive an instruction transmitted by an extension device, the instruction instructing whether to perform a target uplink transmission. The processing unit is configured to determine whether to perform the target uplink transmission according to the instruction.

[0061] With reference to the thirteenth aspect, in some implementations of the thirteenth aspect, the instruction instructs whether to perform an uplink transmission in at least one time unit, the at least one time unit including a target time unit for performing a target uplink transmission.

[0062] According to a fourteenth aspect, an apparatus is provided. The apparatus includes a transceiver unit and a processing unit. The processing unit is configured to determine a serving radio frequency device of at least one terminal device performing a target uplink transmission. The transceiver unit is configured to transmit indication information to the extension device, the indication information indicating the at least one radio frequency device performing the target uplink transmission, and the at least one radio frequency device performing the target uplink transmission is a serving radio frequency device of the at least one terminal device performing the target uplink transmission.

[0063] With reference to the fourteenth aspect, in some implementations of the fourteenth aspect, the processing unit is further configured to determine a serving radio frequency device of at least one terminal device performing uplink transmission in the at least one time unit, where the at least one time unit includes a target time unit in which a target uplink transmission is performed, the instruction information instructs the at least one radio frequency device performing uplink transmission in the at least one time unit, and the at least one radio frequency device performing uplink transmission in the at least one time unit is a serving radio frequency device of the at least one terminal device performing uplink transmission in the at least one time unit.

[0064] With reference to the fourteenth aspect, in some implementations of the fourteenth aspect, the processing unit is further configured to determine a serving radio frequency device of a terminal device performing the target uplink transmission based on a power of an uplink signal received by each radio frequency device from the terminal device performing the target uplink transmission.

[0065] With reference to the fourteenth aspect, in some implementations of the fourteenth aspect, the processing unit is further configured to determine a serving radio frequency device of the terminal device performing the target uplink transmission based on a beam identifier reported by the terminal device performing the target uplink transmission.

[0066] According to a fifteenth aspect, the present application provides an apparatus including a processor. The processor may be coupled to a memory and configured to execute instructions in the memory to perform a method according to the first aspect or any one of the possible implementations of the first aspect, to perform a method according to the second aspect or any one of the possible implementations of the second aspect, or to perform a method according to the fifth aspect or any one of the possible implementations of the fifth aspect. The apparatus further includes the memory. The apparatus further includes a communication interface. The processor is coupled to the communication interface.

[0067] In one implementation, the apparatus is an expansion device. When the apparatus is an expansion device, the communication interface may be a transceiver or an input / output interface.

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

[0069] The transceiver may be a transceiver circuit. The input / output interface may be an input / output circuit.

[0070] According to a sixteenth aspect, the present application provides an apparatus including a processor. The processor may be coupled to a memory and configured to execute instructions in the memory to perform a method according to the third aspect or any one of the possible implementations of the third aspect, or to perform a method according to the sixth aspect or any one of the possible implementations of the sixth aspect. The apparatus further includes the memory. The apparatus further includes a communication interface. The processor is coupled to the communication interface.

[0071] In one implementation, the apparatus is a radio frequency device. If the apparatus is a radio frequency device, the communication interface may be a transceiver or an input / output interface.

[0072] In another implementation, the apparatus is a chip or chip system configured in a radio frequency device. When the apparatus is a chip or chip system configured in a radio frequency device, the communication interface may be an input / output interface.

[0073] The transceiver may be a transceiver circuit. The input / output interface may be an input / output circuit.

[0074] According to a seventeenth aspect, the present application provides an apparatus including a processor. The processor may be coupled to a memory and configured to execute instructions in the memory to perform a method according to the fourth aspect or any one of the possible implementations of the fourth aspect, or to perform a method according to the seventh aspect or any one of the possible implementations of the seventh aspect. The apparatus further includes the memory. The apparatus further includes a communication interface. The processor is coupled to the communication interface.

[0075] In one implementation, the apparatus is a control device. If the apparatus is a control device, the communication interface may be a transceiver or an input / output interface.

[0076] In another implementation, the apparatus is a chip or chip system configured in a control device.When the apparatus is a chip or chip system configured in a control device, the communication interface may be an input / output interface.

[0077] The transceiver may be a transceiver circuit. The input / output interface may be an input / output circuit.

[0078] According to an eighteenth aspect, the present application provides a processor including an input circuit, an output circuit, and a processing circuit configured to receive a signal through the input circuit and to transmit a signal through the output circuit, such that the processor performs the method of the previous aspect.

[0079] In a specific 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, various logic circuits, etc. The input signal received through the input circuit may be, for example, but not limited to, received and input by a receiver, and the signal output through the output circuit may be, for example, but not limited to, output to a transmitter and transmitted by the transmitter, and 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. The specific implementation of the processor and various circuits is not limited in this embodiment of the present application.

[0080] According to a nineteenth aspect, the present application provides a processing device 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 of instructions or data. The processor is configured to execute a computer program, such that the processing device performs the method of the previous aspect.

[0081] According to a twentieth aspect, the present application provides a processing device including a processor and a memory, the processor configured to read instructions stored in the memory, receive a signal using the receiver, and transmit a signal using the transmitter, such that the processing device performs the method of the previous aspect.

[0082] Optionally, there are one or more processors. If present, there may also be one or more memories.

[0083] Optionally, the memory and the processor may be integrated, or the memory and the processor may be located separately.

[0084] In a specific implementation, the memory may be a non-transitory memory such as a read only memory (ROM). The memory and the processor may be integrated on the same chip, or may be separately located on separate chips. The type of memory and the manner in which the memory and the processor are located are not limited in this embodiment of the present application.

[0085] It should be understood that in the related information exchange process, for example, sending instruction information may be a process of outputting instruction information from a processor, and receiving instruction information may be a process of inputting the received instruction information to a processor. Specifically, the information output by the processor may be output to a transmitter, and the input information received by the processor may be from a receiver. The transmitter and receiver may be collectively referred to as a transceiver.

[0086] The apparatus of the nineteenth and twentieth aspects may each be a chip. The processor may be implemented using hardware or software. When the processor is implemented using hardware, the processor may be a logic circuit, an integrated circuit, etc., or when the processor is implemented using software, the processor may be a general-purpose processor and is implemented by reading software code stored in a memory. The memory may be integrated into the processor or may be located outside the processor and exist independently.

[0087] According to a twenty-first aspect, the present application provides a computer program product. The computer program product includes a computer program (sometimes referred to as code or instructions) that, when executed, enables a computer to perform the method of the previous aspect.

[0088] According to a twenty-second aspect, the present application provides a computer-readable storage medium. The computer-readable storage medium stores a computer program (sometimes called code or instructions). When the computer program is executed on a computer, the computer is enabled to perform the method of the aforementioned aspect.

[0089] According to a twenty-third aspect, the present application provides a system, including a control device as described above, an expansion device as described above, and a radio frequency device as described above. [Brief description of the drawings]

[0090] [Figure 1] 1 is a schematic diagram of a system for use in a method according to an embodiment of the present application. [Diagram 2] FIG. 2 is a schematic diagram of downlink transmission. [Diagram 3] 4 is a schematic flowchart of a downlink transmission method according to an embodiment of the present application; [Figure 4] 4 is a schematic flowchart of a downlink transmission method according to another embodiment of the present application; [Diagram 5] 4 is a schematic flowchart of an uplink transmission method according to an embodiment of the present application; [Figure 6] 4 is a schematic flowchart of an uplink transmission method according to another embodiment of the present application; [Figure 7] 1 is a schematic block diagram of an apparatus according to an embodiment of the present application; [Figure 8] FIG. 1 is a schematic diagram of the structure of an apparatus according to an embodiment of the present application. [Figure 9] FIG. 1 is a schematic diagram of a chip system according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0091] Hereinafter, the technical solutions of the embodiments of the present application will be described with reference to the accompanying drawings.

[0092] The technical solutions of the embodiments of the present application may be applied to various communication systems, such as a long term evolution (LTE) system, a frequency division duplex (FDD) system, a time division duplex (TDD) system, a worldwide interoperability for microwave access (WiMAX) communication system, a fifth generation (5G) system or a new radio (NR), a sixth generation (6G) system, or a future communication system. The 5G communication system in the present application includes a non-standalone (NSA) 5G mobile communication system or a standalone (SA) 5G mobile communication system. 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.

[0093] In embodiments of the present application, a terminal device may also be referred to as user equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user equipment.

[0094] The terminal device may be a device that provides a voice / data connection to a user, such as a handheld device or an in-vehicle device with wireless connection capabilities. Currently, some examples of terminals are mobile phones, tablet computers, computers with wireless transmission and reception capabilities (e.g., notebook computers or palmtop computers), mobile internet devices (MIDs), virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals for industrial control, wireless terminals for self driving, wireless terminals for remote medical, wireless terminals for smart grids, wireless terminals for transportation safety, wireless terminals for smart cities, wireless terminals for smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and the like. the terminal device of a 5G network or a future evolved public land mobile network (PLMN).

[0095] Wearable devices, sometimes called wearable intelligent devices, are a general term for wearable devices developed by applying wearable technology to the intelligent design of everyday wearable items, such as glasses, gloves, watches, clothes, and shoes. Wearable devices are portable devices that are directly worn or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also realize powerful functions through software support, data exchange, and cloud interaction. Common wearable intelligent devices include full-function large devices, such as smart watches or smart glasses, that can achieve full or partial functions without relying on a smartphone, and devices that focus only on one type of application function and need to cooperate with other devices such as smartphones to monitor physical symptoms, such as various smart bands or smart jewelry.

[0096] In addition, the terminal device may instead be a terminal device in an Internet of Things (IoT) system. IoT is an important element in the future development of information technology. The main technical feature of IoT is to connect things to a network using communication technology to realize an intelligent network for the interconnection between people and machines and between things. IoT technology can realize large-scale connection of terminals, deep coverage, and power saving, for example by using narrow band NB technology.

[0097] In addition, the terminal devices may instead include sensors such as intelligent printers, train detectors, and gas stations, and their main functions include collecting data (which is the function of some terminal devices), receiving control information and downlink data of network devices, transmitting electromagnetic waves, and transmitting uplink data to network devices.

[0098] Unless otherwise specified, " / " in the description of this application represents an "or" relationship between related objects. For example, A / B can represent A or B. In this application, "and / or" describes only the related relationship between related objects and represents that there are three possible relationships. For example, A and / or B can represent the following three cases: when only A is present, when both A and B are present, and when only B is present. A and B may be singular or plural. In addition, in the description of this application, "multiple" means two or more unless otherwise specified. "At least one of the following" or a similar expression indicates any combination of items, including a singular item or any combination of multiple items. For example, at least one of a, b, or c can represent a, b, c, a and b, a and c, b and c, or a, b, and c, where a, b, and c may be singular or plural.

[0099] In addition, in order to clearly describe the technical solutions of the embodiments of the present application, the embodiments of the present application use terms such as "first" and "second" to distinguish between the same or similar items that provide essentially the same function or purpose. Those skilled in the art can understand that terms such as "first" and "second" do not limit the quantity or execution order, and terms such as "first" and "second" do not indicate clear differences. In addition, in the embodiments of the present application, words such as "example" or "for example" are intended to represent giving an example, illustration, or explanation. Any embodiment or design manner described as "example" or "for example" in the embodiments of the present application should not be described as being preferred over another embodiment or design manner, or as having more advantages than another embodiment or design manner. Strictly speaking, the use of words such as "example" or "for example" is intended to present related concepts in a particular way for ease of understanding.

[0100] In addition, the network architectures and service scenarios in the embodiments of the present application are intended to more clearly explain the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided in the embodiments of the present application. Those skilled in the art can know that with the evolution of network architectures and the emergence of new service scenarios, the technical solutions provided in the embodiments of the present application can also be applied to similar technical problems.

[0101] In order to facilitate understanding of the embodiments of the present application, an application scenario of the embodiments of the present application will first be described in detail with reference to FIG.

[0102] Figure 1 shows the architecture of a system used in a method according to an embodiment of the present application. As shown in Figure 1, the system includes at least one control device, for example, the control device 110 shown in Figure 1. The system further includes at least one expansion device, for example, the expansion device 120 shown in Figure 1. The system further includes at least two radio frequency devices, such as the radio frequency device 131, the radio frequency device 132, and the radio frequency device 133 shown in Figure 1.

[0103] The control device 110 is used as the main device of the base station, which can process digital baseband signals and provide control and management of the functions of each device of the base station.

[0104] The expansion device 120 is connected to the control device 110 through an optical fiber, and is connected to the radio frequency devices 131 to 133 through a network cable. The expansion device 120 is configured to provide a data aggregation and distribution function for communication between the control device 110 and the radio frequency devices 131 to 133. For example, in the uplink direction, the expansion device 120 receives uplink signals from the radio frequency devices 131 to 133, performs radio frequency synthesis on the received uplink signals, and then transmits the radio frequency synthesized uplink signals to the control device 110. As another example, in the downlink direction, the expansion device 120 receives downlink signals transmitted by the control device 110, and transmits the downlink signals to all connected radio frequency devices, i.e., to the radio frequency devices 131 to 133.

[0105] The radio frequency devices 131 to 133 may be used as radio frequency modules of a base station and may be configured to process intermediate frequency signals and / or radio frequency signals, or may be configured to transmit and receive radio signals. Optionally, the radio frequency devices 131 to 133 may be configured to process baseband digital signals, for example to perform fast Fourier transform (FFT) on the baseband digital signals.

[0106] It should be noted that the specific types of the control device, the extension device, and the radio frequency device are not limited in the embodiments of the present application. For example, the control device 110 may be any one of a baseband processing unit (BBU), a distributed unit (DU), and a central unit (CU). For example, the extension device may be any one of a switch, a router, and a remote radio unit hub (rHUB). For example, the radio frequency devices 131 to 133 may be any one of a radio remote unit (RRU), a radio unit (RU), an active antenna unit (AAU), and a pico radio remote unit (pRRU), respectively.

[0107] In some deployments, the control device 110 may include a centralized unit (CU) and a DU, and the DU is connected to the extension device 120 through an optical fiber. Furthermore, the CU may use a control plane (CP) and user plane (UP) separated architecture. That is, the CU may include a CU-CP entity and a CU-UP entity.

[0108] It should be further noted that Fig. 1 only uses an example in which the control device 110 is connected to one expansion device 120, and the control device 110 may be further connected to more expansion devices. In addition, Fig. 1 only uses an example in which the expansion device 120 is connected to three radio frequency devices (radio frequency device 131 to radio frequency device 133), and the expansion device 120 may be further connected to more radio frequency devices.

[0109] In the system shown in FIG. 1, during downlink transmission, the extension device 120 forwards the downlink data transmitted by the control device 110 to all connected radio frequency devices (i.e., radio frequency device 131 to radio frequency device 133), and then all radio frequency devices transmit the received downlink data. However, as shown in FIG. 2, the downlink data transmitted by the control device can only be transmitted to users within the coverage of the radio frequency device (e.g., RRU) in cell 1. Therefore, when another radio frequency device transmits its downlink data, an invalid transmission occurs. In addition, interference may occur to the neighboring cell 2.

[0110] In consideration of this, an embodiment of the present application provides a downlink transmission method to reduce the energy consumption of downlink transmission and the interference to adjacent cells.

[0111] 3 is a schematic flowchart of a downlink transmission method according to an embodiment of the present application. As shown in FIG. 3, the method 300 may include S310 to S340. These steps are described in detail below.

[0112] S310: The control device determines a serving radio frequency device of a terminal device configured to receive downlink data.

[0113] For example, the control device may be a BBU, BU, CU, or DU, and the radio frequency device may be an RRU, RU, pRRU, or AAU.

[0114] The serving radio frequency device of a terminal device is a radio frequency device that has a communication connection to the terminal device. When the radio frequency device has a communication connection to the terminal device, the radio frequency device can communicate with the terminal device. For example, the radio frequency device can transmit downlink data received from the control device to the terminal device. As another example, the radio frequency device can receive uplink data from the terminal device.

[0115] For example, the control device determines a serving radio frequency device of at least one terminal device configured to receive the target downlink data. The target downlink data is downlink data transmitted in the target time unit. In other words, the terminal device configured to receive the target downlink data is a terminal device configured to receive the downlink data in the target time unit.

[0116] It should be noted that the target time unit is a term introduced for easier description of the technical solutions of the embodiments of the present application, and the target time unit may be any time unit, but does not represent a specific time unit, for example, the target time unit is the current time unit.

[0117] It should be further noted that the time unit is not limited in the embodiment of the present application. For example, the time unit may be any one of seconds (s), milliseconds (ms), frames, subframes, slots, symbols, and transmission time intervals (TTIs). For example, if the target time unit refers to the current time and the time unit is TTI, the terminal device for which downlink scheduling is performed may be the terminal device for which downlink scheduling is performed in the current TTI.

[0118] As another example, the control device determines a serving radio frequency device of at least one terminal device configured to receive downlink data in a plurality of time units. The plurality of time units includes a target time unit carrying target downlink data. It should be noted that the terminal device configured to receive downlink data in each of the plurality of time units may be different. For example, the plurality of TTIs include TTI#1, TTI#2, and TTI#3, the terminal device configured to receive downlink data in TTI#1 includes UE#1, the terminal device configured to receive downlink data in TTI#2 includes UE#1 and UE#2, and the terminal device configured to receive downlink data in TTI#3 includes UE#3.

[0119] The manner in which the control device determines the serving radio frequency device of the terminal device is not limited in this embodiment of the present application.

[0120] In one possible implementation, the control device determines the serving radio frequency device of the terminal device by polling an uplink signal, which may be a demodulation reference signal (DMRS), a sounding reference signal (SRS), a signal carried on a physical random access channel (PRACH), or a signal carried on a physical uplink control channel (PUCCH).

[0121] The following takes an example in which the uplink signal is an SRS to describe how the control device determines the serving radio frequency device of the terminal device by polling the uplink signal.

[0122] Step 1: After the terminal device accesses the network, the control device configures SRS resources for the terminal device, so that the terminal device can transmit SRS through the allocated SRS resources.

[0123] Step 2: The control device transmits an instruction so that the control device receives only the SRS reported by one radio frequency device or a part of multiple radio frequency devices at a time point, and the control device receives the SRS reported by each radio frequency device at each time point. For example, the control device transmits an instruction so that the control device receives only the SRS reported by radio frequency device #1 at time point #1, the control device receives only the received SRS reported by radio frequency device #2 at time point #2, and the control device receives only the received SRS reported by radio frequency device #3 at time point #3. The terminal device transmits the SRS once at the time point. For example, the time point is one SRS symbol.

[0124] For example, the control device transmits an instruction to the extension device, so that the extension device forwards only the SRS reported by the radio frequency device or a part of the radio frequency devices to the control device at the time point, and the extension device forwards the SRS reported by each radio frequency device at each time point to the control device. Specifically, the control device transmits an instruction to the extension device to indicate the radio frequency devices configured to report the SRS at each time point. Thus, the extension device forwards only the signals reported by the radio frequency devices configured to report the SRS at the time point to the control device according to the instruction received from the control device. For example, the control device transmits an instruction to the extension device to indicate that the radio frequency device configured to report the SRS at time point #1 is the radio frequency device #1. In this case, the extension device forwards only the SRS reported by the radio frequency device #1 to the control device at time point #1.

[0125] For example, the control device transmits an instruction to each radio frequency device via the extension device, so that only the radio frequency device or a part of the multiple radio frequency devices reports the received SRS at the time point, and each radio frequency device reports the received SRS at each time point. For example, the control device transmits an instruction to radio frequency device #1 via the extension device to instruct radio frequency device #1 to report the received SRS at time point #1. In this case, only radio frequency device #1 reports the received SRS to the control device via the extension device at time point #1.

[0126] Step 3: The control device determines the serving radio frequency device of the terminal device based on the power of the SRS reported by each radio frequency device. For example, the control device determines that the serving radio frequency device of the terminal device is the radio frequency device that reports the SRS with the highest power. For example, if the control device detects the power of the SRS reported by radio frequency device #1 to radio frequency device #3 and determines that the power of the SRS reported by radio frequency device #1 is the highest, the control device determines that the serving radio frequency device of the terminal device is radio frequency device #1. As another example, the control device determines that the radio frequency device that reports the SRS with power exceeding the power threshold is the serving radio frequency device of the terminal device. For example, if the control device detects the power of the SRS reported by radio frequency device #1 to radio frequency device #3 and determines that the power of the signal reported by radio frequency device #1 exceeds the power threshold and the power of the SRS reported by radio frequency device #2 also exceeds the power threshold, the control device determines that the serving radio frequency devices of the terminal device are radio frequency device #1 and radio frequency device #2.

[0127] In one possible implementation, the control device determines the serving radio frequency device of the terminal device by polling a downlink signal, which may be a channel state information reference signal (CSI-RS) or a synchronization signal and physical broadcast channel block (SSB).

[0128] The following takes an example in which the downlink signal is CSI-RS to describe how the control device determines the serving radio frequency device of the terminal device by polling the downlink signal.

[0129] Step 1: After the terminal device accesses the network, the control device can configure CSI-RS resources for the terminal device, so that the terminal device can receive CSI-RS from the control device through the allocated CSI-RS resources.

[0130] Step 2: The control device sends an instruction, so that only one radio frequency device or a part of the radio frequency devices transmits CSI-RS at a time, and each radio frequency device transmits the CSI-RS received from the control device at each time point. For example, the control device sends an instruction, so that only radio frequency device #1 transmits CSI-RS at time point #1, only radio frequency device #2 transmits CSI-RS at time point #2, and only radio frequency device #3 transmits CSI-RS at time point #3. The radio frequency devices transmit CSI-RS at least once at the time point. It is further noted that the CSI-RS transmitted by different radio frequency devices have different beam identifiers.

[0131] For example, the control device sends an instruction to the extension device, so that the extension device forwards CSI-RS to only the radio frequency device or a part of the radio frequency devices at the time point, and the extension device forwards CSI-RS to each radio frequency device at each time point. Specifically, the control device sends an instruction to the extension device to indicate the radio frequency devices configured to transmit CSI-RS at each time point. Therefore, the extension device transmits CSI-RS at the time point only to the radio frequency devices configured to transmit CSI-RS at the time point according to the instruction received from the control device. For example, the control device sends an instruction to the extension device to indicate that the radio frequency device configured to transmit CSI-RS at time point #1 is radio frequency device #1. In this case, the extension device forwards only the CSI-RS received from the control device to radio frequency device #1 at time point #1.

[0132] For example, the control device transmits an instruction to each radio frequency device via the extension device, so that only the radio frequency device or a part of the multiple radio frequency devices transmits CSI-RS at the time point. For example, the control device transmits an instruction to radio frequency device #1 via the extension device to instruct radio frequency device #1 to transmit CSI-RS at time point #1. In this case, only radio frequency device #1 transmits CSI-RS at time point #1.

[0133] Step 3: The control device determines the serving radio frequency device of the terminal device based on the beam identifier reported by the terminal device. For example, if the beam identifier reported by the terminal device corresponds to the CSI-RS transmitted by the radio frequency device #1, the control device determines that the serving radio frequency device of the terminal device is the radio frequency device #1.

[0134] Optionally, the control device may configure a measurement report for the terminal device, which may be for reporting the beam identifier of the CSI-RS periodically or aperiodically.

[0135] The opportunity for the control device to determine the serving radio frequency device of at least one terminal device configured to receive downlink data is not limited in this embodiment of the present application.

[0136] For example, when a terminal device accesses the network, the control device determines the serving radio frequency device of the terminal device by performing uplink signal polling or downlink signal polling. Furthermore, after determining at least one terminal device configured to receive downlink data, the control device can directly determine the serving radio frequency device of at least one terminal device configured to receive downlink data without performing uplink signal polling or downlink signal polling. For example, the coverage of the control device includes UE#1, UE#2, and UE#3. After UE#1 accesses the network, the control device determines that the serving radio frequency device of UE#1 is pRRU#2 by performing uplink signal polling or downlink signal polling. After UE#2 accesses the network, the control device determines that the serving radio frequency device of UE#2 is pRRU#4 by performing uplink signal polling or downlink signal polling. After UE#3 accesses the network, the control device determines that the serving radio frequency device of UE#3 is pRRU#4 by performing uplink signal polling or downlink signal polling. Furthermore, when the control device determines that at least one terminal device configured to receive downlink data includes UE#1 and UE#2, the control device can directly determine the serving radio frequency devices of UE#1 and UE#2 without performing polling of uplink signals or polling of downlink signals.

[0137] It should be noted that in this embodiment of the present application, the case where the serving radio frequency device of the terminal device is determined only when the terminal device accesses the network does not constitute a limitation. When the terminal device is always within the coverage of the control device, the control device can perform the polling of the uplink signal multiple times or the polling of the downlink signal multiple times to dynamically determine the serving radio frequency device of the terminal device. For example, the control device can periodically perform the polling of the uplink signal or periodically perform the polling of the downlink signal to periodically determine the serving radio frequency device of the terminal device. Alternatively, the control device can non-periodically perform the polling of the uplink signal or non-periodically perform the polling of the downlink signal to non-periodically determine the serving radio frequency device of the terminal device.

[0138] As another example, after determining at least one terminal device configured to receive downlink data, the control device determines a serving radio frequency device of the at least one terminal device configured to receive downlink data by performing uplink signal polling or downlink signal polling. For example, the coverage of the control device includes UE#1, UE#2, and UE#3. If the control device determines that the at least one terminal device configured to receive downlink data includes UE#1 and UE#2, the control device determines the serving radio frequency device of UE#1 and UE#2 by performing uplink signal polling or downlink signal polling. Because UE#3 is not configured to receive downlink data, the control device does not need to determine the serving radio frequency device of UE#3.

[0139] S320: The control device transmits instruction information to the expansion device. Thus, in S320, the expansion device receives instruction information from the control device.

[0140] For example, the extension device may be a switch, a router, or an rHUB.

[0141] The indication information indicates a radio frequency device configured to transmit the target downlink data. Since the target downlink data transmitted by the control device needs to be forwarded to at least one terminal device by a serving radio frequency device of at least one terminal device configured to receive the target downlink data, it is understood that the radio frequency device configured to transmit the target downlink data indicated by the indication information is the serving radio frequency device of at least one terminal device configured to receive the target downlink data. In other words, the indication information indicates the serving radio frequency device of at least one terminal device configured to receive the target downlink data.

[0142] In one possible implementation, in S310, when the control device determines a serving radio frequency device of at least one terminal device configured to receive the target downlink data, the control device can determine the indication information based on the serving radio frequency device of the at least one terminal device configured to receive the target downlink data.

[0143] In another possible implementation, in S310, when the control device determines the serving radio frequency device of at least one terminal device configured to receive downlink data in multiple time units, the control device can determine the serving radio frequency device of at least one device configured to receive the target downlink data in the serving radio frequency device of at least one terminal device configured to receive downlink data in multiple time units, and then the control device determines the indication information based on the serving radio frequency device of at least one terminal device configured to receive the target downlink data. For example, in S310, when the control device determines the serving radio frequency device of the terminal device configured to receive downlink data in TTI#1 to TTI#3, the control device first determines the serving radio frequency device of the terminal device configured to receive downlink data in the current TTI (e.g., TTI#2), and then determines the indication information based on the serving radio frequency device of the terminal device configured to receive downlink data in the current TTI.

[0144] The manner in which the indication information indicates the radio frequency device configured to convey the intended downlink data is not limited in this embodiment of the present application.

[0145] For example, the indication information includes an identifier of a radio frequency device configured to transmit the target downlink data. Therefore, the extension device can identify the radio frequency device configured to transmit the target downlink data based on the identifier included in the indication information. The identifier of the radio frequency device identifies the radio frequency device. For example, the identifier of the radio frequency device includes any one or more of an electronic serial number (ESN) of the radio frequency device, a cabinet number of a cabinet in which the radio frequency device is located, a subrack number of a subrack in which the radio frequency device is located, and a slot number of a slot in which the radio frequency device is located.

[0146] As another example, the indication information includes identifiers of radio frequency devices that are not configured to transmit the target downlink data. Therefore, the extension device can exclude radio frequency devices that are not configured to transmit the target downlink data from the connected radio frequency devices based on the identifiers included in the indication information, and the remaining radio frequency devices are radio frequency devices that are configured to transmit the target downlink data. For example, the radio frequency devices connected to the extension device include pRRU#1 to pRRU#4, and the indication information includes an identifier of pRRU#3 and an identifier of pRRU#4. In this case, the extension device can determine that pRRU#3 and pRRU#4 are not configured to transmit the target downlink data based on the identifiers included in the indication information, and therefore determine that pRRU#1 and pRRU#2 are configured to transmit the target downlink data.

[0147] As yet another example, the indication information includes N bits, where the value of N is equal to the number of radio frequency devices connected to the expansion device. Each of the N bits corresponds to one radio frequency device connected to the expansion device. For example, if the expansion device is connected to four radio frequency devices, the indication information includes four bits, where the four bits correspond one-to-one to the four radio frequency devices. Each of the N bits included in the indication information indicates whether the radio frequency device corresponding to the bit is configured to transmit the target downlink data. For example, if the value of the n-th bit is "1", the n-th bit indicates that the radio frequency device corresponding to the n-th bit is configured to transmit the target downlink data, or if the value of the n-th bit is "0", the n-th bit indicates that the radio frequency device corresponding to the n-th bit is not configured to transmit the target downlink data. Alternatively, if the value of the n-th bit is "0", the n-th bit indicates that the radio frequency device corresponding to the n-th bit is configured to transmit the target downlink data, or if the value of the n-th bit is "1", the n-th bit indicates that the radio frequency device corresponding to the n-th bit is not configured to transmit the target downlink data. The nth bit is any one of the N bits.

[0148] It should be noted that although the target downlink data is downlink data transmitted in a target time unit, whether the indication information further indicates the target time unit for transmitting the target downlink data is not limited in this embodiment of the present application.

[0149] For example, the indication information does not indicate a target time unit. For example, the expansion device can consider, by default, the target time unit to be the time unit at which the expansion device receives the indication information. In other words, the expansion device can consider, by default, the target downlink data to be downlink data transmitted in the time unit at which the expansion device receives the indication information. For example, if the time unit is TTI and the expansion device receives the indication information in TTI#1, the expansion device can determine that the target time unit is TTI#1. In other words, the expansion device can determine that the target downlink data is downlink data transmitted in TTI#1. As another example, the expansion device can consider, by default, the target time unit to be the time unit following the time unit at which the expansion device receives the indication information. In other words, the expansion device can consider, by default, the target downlink data to be downlink data transmitted in the time unit following the time unit at which the expansion device receives the indication information. For example, if the time unit is slot and the expansion device receives the indication information in slot#1, the expansion device can determine that the target time unit is slot#2 following slot#1. In other words, the extension device can determine that the target downlink data is downlink data transmitted in slot #2 following slot #1.

[0150] As another example, the indication information indicates a target time unit. For example, when the time unit is a subframe, the indication information further indicates a subframe number of a target subframe. It can be understood that when the indication information indicates a target time unit, the indication information indicates a radio frequency device configured to convey the target downlink data in the target time unit.

[0151] Optionally, in S310, when the control device determines a serving radio frequency device of at least one terminal device configured to receive downlink data in multiple time units, the indication information can indicate at least one radio frequency device configured to convey the downlink data in multiple time units.

[0152] Since the downlink data transmitted by the control device in multiple time units needs to be forwarded by the radio frequency device to the terminal device, it is understood that the at least one radio frequency device indicated by the instruction information is a serving radio frequency device of at least one terminal device configured to receive the downlink data in multiple time units. For example, if the control device determines in S310 that the terminal devices configured to receive the downlink data in TTI#1 to TTI#3 include UE#1 to UE#3, and determines that the serving radio frequency device of UE#1 is pRRU#2 and the serving radio frequency device of UE#2 and UE#3 is pRRU#4, the at least one radio frequency device indicated by the instruction information includes pRRU#2 and / or pRRU#4.

[0153] For example, the at least one radio frequency device indicated by the indication information is configured to transmit downlink data in all of the multiple time units. In other words, the radio frequency devices configured to transmit downlink data in all of the multiple time units are the same. For example, the at least one radio frequency device indicated by the indication information is a radio frequency device that serves the maximum number of terminal devices among the serving radio frequency devices of the at least one terminal device configured to receive downlink data in the multiple time units. For example, the at least one radio frequency device indicated by the indication information is pRRU#4. As another example, the at least one radio frequency device indicated by the indication information includes the serving radio frequency devices of all terminal devices configured to receive downlink data in the multiple time units. For example, the at least one radio frequency device indicated by the indication information includes pRRU#2 and pRRU#4.

[0154] As another example, the instruction information may indicate a radio frequency device configured to communicate downlink data in each of the plurality of time units. The radio frequency device configured to communicate downlink data in a first time unit of the plurality of time units is a serving radio frequency device of a terminal device configured to receive downlink data in the first time unit, and the first time unit is any one of the plurality of time units. It will be understood that when the terminal devices receiving the downlink data in each time unit are different, the radio frequency devices configured to communicate downlink data in each time unit indicated by the instruction information may also be different. For example, if the terminal device receiving downlink data at TTI#1 is UE#1, the terminal devices receiving downlink data at TTI#2 are UE#1 and UE#2, and the terminal device receiving downlink data at TTI#3 is UE#3, the instruction information indicates that the radio frequency device configured to transmit downlink data at TTI#1 is pRRU#2, the radio frequency devices configured to transmit downlink data at TTI#2 are pRRU#2 and pRRU#4, and the radio frequency device configured to transmit downlink data at TTI#3 is pRRU#4.

[0155] The manner in which the indication information indicates the at least one radio frequency device configured to convey downlink data in multiple time units is not limited in this embodiment of the present application.

[0156] For example, the indication information includes a correspondence between the time units and the identifiers of the radio frequency devices configured to transmit the downlink data. Therefore, the extension device can determine the radio frequency devices configured to transmit the downlink data in all of the multiple time units based on the correspondence between the time units and the identifiers of the radio frequency devices. For example, the indication information is shown in Table 1 or Table 2.

[0157] [Table 1]

[0158] [Table 2]

[0159] As another example, the indication information includes a correspondence between the time units and the identifiers of the radio frequency devices that are not configured to transmit downlink data. Therefore, the extension device can determine the radio frequency devices that are not configured to transmit downlink data in any of the multiple time units based on the correspondence between the time units and the identifiers of the radio frequency devices, thereby determining the radio frequency devices that are configured to transmit downlink data. For example, the indication information is shown in Table 3 or Table 4. Assume that the radio frequency devices connected to the extension device include pRRU#1 to pRRU#4.

[0160] [Table 3]

[0161] [Table 4]

[0162] As another example, the indication information includes a correspondence between the time units and the N bits. Therefore, the extension device can determine the radio frequency devices configured to transmit downlink data in all of the multiple time units based on the correspondence between the time units and the N bits. For example, the indication information is shown in Table 5 or Table 6. Assume that the radio frequency devices connected to the extension device include pRRU#1 to pRRU#4, where "1" indicates that the radio frequency devices are configured to transmit downlink data and "0" indicates that the radio frequency devices are not configured to transmit downlink data.

[0163] [Table 5]

[0164] [Table 6]

[0165] S330: The control device transmits the target downlink data to the extension device. Thus, in S330, the extension device receives the target downlink data from the control device.

[0166] S340: The extension device transmits the target downlink data to a radio frequency device configured to communicate the target downlink data based on the instruction information.

[0167] The target downlink data is downlink data that is transmitted in the target time unit.

[0168] In S320, if the instruction information received by the expansion device indicates only the radio frequency device configured to transmit the target downlink data, the expansion device directly transmits the target downlink data to the radio frequency device indicated by the instruction information after receiving the target downlink data. For example, if the instruction information received by the expansion device indicates only that the radio frequency device configured to transmit the target downlink data includes pRRU#2, the expansion device directly transmits the target downlink data received from the control device to pRRU#2 after receiving the target downlink data transmitted by the control device at TTI#1.

[0169] In S320, if the instruction information received by the expansion device indicates at least one radio frequency device configured to transmit downlink data in a plurality of time units, and the at least one radio frequency device is configured to transmit downlink data in all of the plurality of time units, the expansion device directly transmits the target downlink data to the radio frequency device indicated by the instruction information after receiving the target downlink data. For example, the instruction information received by the expansion device indicates that the radio frequency devices configured to transmit downlink data in TTI#1 to TTI#3 include pRRU#2 and pRRU#4. In S330, if the expansion device receives downlink data transmitted by the control device in TTI#1, the expansion device directly transmits the downlink data received from the control device to pRRU#2 and pRRU#4. Alternatively, in S330, if the expansion device receives downlink data transmitted by the control device in TTI#2, the expansion device directly transmits the downlink data received from the control device to pRRU#2 and pRRU#4. Alternatively, in S330, when the expansion device receives downlink data transmitted by the control device in TTI#3, the expansion device transmits the downlink data received from the control device directly to pRRU#2 and pRRU#4.

[0170] In S320, when the instruction information received by the expansion device indicates a radio frequency device configured to transmit downlink data in each of a plurality of time units, the expansion device, after receiving the target downlink data, first determines a radio frequency device configured to transmit the target downlink data in the target time unit based on the instruction information, and then transmits the target downlink data to the radio frequency device configured to transmit the target downlink data in the target time unit. For example, the instruction information received by the expansion device indicates that the radio frequency device configured to transmit the downlink data in TTI#1 includes pRRU#2, the radio frequency device configured to transmit the downlink data in TTI#2 includes pRRU#2 and pRRU#4, and the radio frequency device configured to transmit the downlink data in TTI#3 includes pRRU#4. In S330, when the expansion device receives downlink data transmitted by the control device in TTI#1, the expansion device first determines that pRRU#2 is configured to transmit downlink data in TTI#1 based on the instruction information, and then transmits the downlink data received from the control device to pRRU#2. Alternatively, in S330, when the expansion device receives downlink data transmitted by the control device in TTI#2, the expansion device first determines based on the indication information that pRRU#2 and pRRU#4 are configured to transmit downlink data in TTI#2, and then the expansion device transmits the downlink data received from the control device to pRRU#2 and pRRU#4. Alternatively, in S330, when the expansion device receives downlink data transmitted by the control device in TTI#3, the expansion device first determines based on the indication information that pRRU#4 is configured to transmit downlink data in TTI#3, and then the expansion device transmits the downlink data received from the control device to pRRU#4.

[0171] Therefore, the radio frequency device configured to convey the target downlink data transmits the target downlink data to the terminal device within its coverage after receiving the target downlink data from the extension device.

[0172] It should be noted that in S340, the extension device does not transmit the intended downlink data to a radio frequency device that is not configured to convey the intended downlink data.

[0173] In this embodiment of the present application, the control device determines the serving radio frequency device of at least one terminal device configured to receive the target downlink data by polling the uplink signal or polling the downlink signal, and sends instruction information to the extension device to instruct the extension device to transmit the target downlink data to the radio frequency device configured to transmit the target downlink data, so that only the radio frequency device configured to receive the target downlink data can receive the target downlink data. It should be understood that the radio frequency device not configured to transmit the target downlink data is not the serving radio frequency device of the terminal device configured to receive the target downlink data, so that the terminal device configured to receive the target downlink data cannot receive the target downlink data from the radio frequency device not configured to transmit the target downlink data. Therefore, when the radio frequency device not configured to transmit the target downlink data cannot receive the target downlink data, invalid transmission can be avoided and downlink power consumption can be reduced. If the radio frequency device not configured to transmit the target downlink data is adjacent to another cell, interference to the adjacent cell can be further avoided.

[0174] 4 is a schematic flowchart of a downlink transmission method according to another embodiment of the present application. As shown in FIG. 4, the method 400 may include S410 to S460. The following describes these steps in detail.

[0175] S410: The control device determines a serving radio frequency device of at least one terminal device configured to receive downlink data.

[0176] Specifically, S410 is the same as S310 of method 300. For the sake of brevity, the details will not be described again in this embodiment of the present application.

[0177] S420: The control device transmits instruction information to the expansion device. Thus, in S420, the expansion device receives instruction information from the control device.

[0178] Specifically, S420 is the same as S320 of method 300. For the sake of brevity, the details will not be described again in this embodiment of the present application.

[0179] S430: The extension device transmits a command to the radio frequency device, so that in S430 the radio frequency device receives a command from the control device.

[0180] This command instructs whether to transmit target downlink data. For a description of target downlink data, please refer to S310.

[0181] In one possible implementation, the augmentation device sending instructions to the radio frequency device includes the augmentation device sending a first instruction to the radio frequency device configured to communicate the target downlink data, the first instruction instructing the augmentation device to transmit the target downlink data.

[0182] For example, in S420, when the instruction information received by the expansion device indicates a radio frequency device configured to transmit the target downlink data, the expansion device can transmit a first instruction to the radio frequency device indicated by the instruction information. For example, when the instruction information received by the expansion device indicates that the radio frequency device configured to transmit the target downlink data includes a pRRU#2, the expansion device transmits a first instruction to the pRRU#2.

[0183] As another example, in S420, if the instruction information received by the expansion device indicates at least one radio frequency device configured to transmit downlink data in a plurality of time units, and the at least one radio frequency device is configured to transmit downlink data in all of the plurality of time units, the expansion device can transmit a first instruction to the radio frequency device indicated by the instruction information. For example, if the instruction information received by the expansion device indicates that the radio frequency devices configured to transmit downlink data in TTI#1 to TTI#3 include pRRU#2 and pRRU#4, the expansion device transmits a first instruction to pRRU#2 and pRRU#4. For example, in TTI#1, the first instruction transmitted by the expansion device to pRRU#2 and pRRU#4 instructs them to transmit the downlink data transmitted in TTI#1. As another example, in TTI#2, the first instruction transmitted by the expansion device to pRRU#2 and pRRU#4 instructs them to transmit the downlink data transmitted in TTI#2. As another example, in TTI#3, a first command sent by the expansion device to pRRU#2 and pRRU#4 instructs them to transmit downlink data transmitted in TTI#3. As another example, a first command sent by the expansion device to pRRU#2 and pRRU#4 instructs them to transmit downlink data transmitted in TTI#1 to TTI#3.

[0184] As yet another example, in S420, when the instruction information received by the expansion device indicates a radio frequency device configured to transmit downlink data in each of a plurality of time units, the expansion device first determines, based on the instruction information, a radio frequency device configured to transmit the target downlink data in the target time unit, and then transmits a first instruction to the radio frequency device configured to transmit the target downlink data in the target time unit. For example, the instruction information received by the expansion device indicates that the radio frequency device configured to transmit downlink data in TTI#1 includes pRRU#2, the radio frequency device configured to transmit downlink data in TTI#2 includes pRRU#2 and pRRU#4, and the radio frequency device configured to transmit downlink data in TTI#3 includes pRRU#4. In TTI#1, the expansion device first determines, based on the instruction information, that pRRU#2 is configured to transmit downlink data in TTI#1, and then transmits a first instruction to pRRU#2. Alternatively, in TTI#2, the expansion device first determines based on the indication information that pRRU#2 and pRRU#4 are configured to transmit downlink data in TTI#2, and then the expansion device sends a first instruction to pRRU#2 and pRRU#4. Alternatively, in TTI#3, the expansion device first determines based on the indication information that pRRU#4 is configured to transmit downlink data in TTI#3, and then the expansion device sends a first instruction to pRRU#4.

[0185] The first instruction is not limited in this embodiment of the present application. For example, the extension device can generate the first instruction based on the instruction information. For example, the first instruction can be one bit of information. As another example, the first instruction is instruction information. Specifically, the extension device transmits the received instruction information to a radio frequency device configured to transmit the target downlink data.

[0186] It should be noted that although the first instruction instructs transmitting the target downlink data, whether the first instruction further indicates a target time unit in which to convey the target downlink data is not limited in this embodiment of the present application.

[0187] For example, the first command does not indicate a target time unit. For example, the radio frequency device may consider, by default, that the target time unit is the time unit in which the augmentation device receives the first command. In other words, the radio frequency device may consider, by default, that the target downlink data is downlink data that is conveyed in the time unit in which the radio frequency device receives the first command. For example, if the time unit is TTI and the radio frequency device receives the first command in TTI#1, the radio frequency device may determine that the target time unit is TTI#1. In other words, the radio frequency device may determine that the target downlink data that the first command instructs to transmit is downlink data that is conveyed in TTI#1. Alternatively, the radio frequency device may consider, by default, that the target time unit is the time unit after the time unit in which the radio frequency device receives the first command. As another example, the radio frequency device may consider, by default, that the target downlink data is downlink data that is conveyed in the time unit after the time unit in which the radio frequency device receives the first command. For example, if the time unit is a slot and the radio frequency device receives the first command in slot #1, the radio frequency device can determine that the target time unit is slot #2 after slot #1. In other words, the radio frequency device can determine that the target downlink data that the first command instructs to transmit is the downlink data conveyed in slot #2 after slot #1.

[0188] As another example, the first instruction indicates a target time unit, e.g., if the time unit is a slot, the first instruction further indicates a slot number of the target slot.

[0189] In another possible implementation, the augmentation device sending instructions to the radio frequency device includes the augmentation device sending a second instruction to the radio frequency device not configured to communicate the target downlink data, the second instruction instructing the radio frequency device not to transmit the target downlink data.

[0190] For example, in S420, when the instruction information received by the expansion device indicates a radio frequency device configured to transmit the target downlink data, the expansion device can transmit the second instruction to the radio frequency device not indicated by the instruction information. For example, when the radio frequency devices connected to the expansion device include pRRU#1 to pRRU#4, and the instruction information received by the expansion device indicates that the radio frequency device configured to transmit the target downlink data includes pRRU#2, the expansion device transmits the second instruction to pRRU#1, pRRU#3, and pRRU#4.

[0191] As another example, in S420, when the instruction information received by the expansion device instructs at least one radio frequency device configured to transmit downlink data in a plurality of time units, and the at least one radio frequency device is configured to transmit downlink data in all of the plurality of time units, the expansion device can transmit the second instruction to the radio frequency devices not instructed by the instruction information. For example, when the radio frequency devices connected to the expansion device include pRRU#1 to pRRU#4, and the instruction information received by the expansion device indicates that the radio frequency devices configured to transmit downlink data in TTI#1 to TTI#3 include pRRU#2 and pRRU#4, the expansion device transmits the second instruction to pRRU#1 and pRRU#3. For example, in TTI#1, the second instruction transmitted by the expansion device to pRRU#1 and pRRU#3 instructs them not to transmit the downlink data transmitted in TTI#1. As another example, in TTI#2, a second command transmitted by the extension device to pRRU#1 and pRRU#3 instructs them not to transmit downlink data transmitted in TTI#2. As another example, in TTI#3, a second command transmitted by the extension device to pRRU#1 and pRRU#3 instructs them not to transmit downlink data transmitted in TTI#3. As another example, a second command transmitted by the extension device to pRRU#1 and pRRU#3 instructs them not to transmit downlink data transmitted in TTI#1 to TTI#3.

[0192] As yet another example, in S420, when the instruction information received by the expansion device indicates radio frequency devices configured to transmit downlink data in each of a plurality of time units, the expansion device first determines, based on the instruction information, radio frequency devices that are not configured to transmit the target downlink data in the target time unit, and then transmits a second instruction to the radio frequency devices that are not configured to transmit the target downlink data in the target time unit. For example, the instruction information received by the expansion device indicates that the radio frequency devices configured to transmit downlink data in TTI#1 include pRRU#2, the radio frequency devices configured to transmit downlink data in TTI#2 include pRRU#2 and pRRU#4, and the radio frequency devices configured to transmit downlink data in TTI#3 include pRRU#4. In TTI#1, the expansion device first determines, based on the instruction information, that pRRU#1, pRRU#3, and pRRU#4 are not configured to transmit downlink data in TTI#1, and then transmits a second instruction to pRRU#1, pRRU#3, and pRRU#4. Alternatively, in TTI#2, the expansion device first determines based on the instruction information that pRRU#1 and pRRU#3 are not configured to transmit downlink data in TTI#2, and then the expansion device transmits a second instruction to pRRU#1 and pRRU#3. Alternatively, in TTI#3, the expansion device first determines based on the instruction information that pRRU#1 to pRRU#3 are not configured to transmit downlink data in TTI#3, and then the expansion device transmits a second instruction to pRRU#1 to pRRU#3.

[0193] The second instruction is not limited in this embodiment of the present application. For example, the extension device can generate the second instruction based on the instruction information. For example, the second instruction can be one bit of information. As another example, the second instruction is instruction information. Specifically, the extension device transmits the received instruction information to a radio frequency device that is not configured to transmit the target downlink data.

[0194] It should be noted that although the second instruction instructs not to transmit the target downlink data, whether the second instruction further indicates a target time unit in which to convey the target downlink data is not limited in this embodiment of the present application.

[0195] For example, the second command does not indicate a target time unit. For example, the radio frequency device may, by default, consider the target time unit to be the time unit in which the augmentation device receives the second command. In other words, the radio frequency device may, by default, consider the target downlink data to be downlink data communicated in the time unit in which the radio frequency device receives the second command. As another example, the radio frequency device may, by default, consider the target time unit to be the time unit after the time unit in which the radio frequency device receives the second command. In other words, the radio frequency device may, by default, consider the target downlink data to be downlink data communicated in the time unit after the time unit in which the radio frequency device receives the second command.

[0196] As another example, the second instruction indicates a target time unit, e.g., if the time unit is a slot, the second instruction further indicates a slot number of the target slot.

[0197] In yet another possible implementation, the augmentation device sending instructions to the radio frequency devices includes the augmentation device sending a first instruction to the radio frequency devices configured to communicate the target downlink data and sending a second instruction to the radio frequency devices not configured to communicate the target downlink data.

[0198] When the expansion device transmits both the first command and the second command, if both the first command and the second command are instruction information, the expansion device can transmit the instruction information in a broadcast manner. It will be understood that when the expansion device transmits the instruction information in a broadcast manner, all radio frequency devices connected to the expansion device can receive the instruction information from the expansion device. It will be further understood that when the expansion device transmits the instruction information in a broadcast manner, the expansion device can not analyze the instruction information, and can transmit the received instruction information directly to the connected radio frequency devices.

[0199] Optionally, if the instruction information received by the expansion device in S420 indicates the radio frequency devices configured to transmit downlink data in each of the multiple time units, the instruction sent by the expansion device to the radio frequency devices in S430 can indicate whether the radio frequency devices are configured to transmit downlink data in each of the multiple time units. For example, if the instruction information received by the expansion device indicates that the radio frequency devices configured to transmit downlink data in TTI#1 include pRRU#2, that the radio frequency devices configured to transmit downlink data in TTI#2 include pRRU#2 and pRRU#4, and that the radio frequency devices configured to transmit downlink data in TTI#3 include pRRU#4, the instruction sent by the expansion device to pRRU#1 in S430 can instruct not to transmit the downlink data transmitted in TTI#1 to TTI#3. the instruction sent by the extended device to pRRU#2 instructs it to transmit downlink data transmitted in TTI#1 and TTI#2 and not to transmit downlink data transmitted in TTI#3; the instruction sent by the extended device to pRRU#3 instructs it not to transmit downlink data transmitted in TTI#1 to TTI#3; and the instruction sent by the extended device to pRRU#4 instructs it to transmit downlink data transmitted in TTI#2 and TTI#3 and not to transmit downlink data transmitted in TTI#1.

[0200] The command sent by the extension device to each radio frequency device may be a command generated by the extension device based on the instruction information. Alternatively, the command sent by the extension device to each radio frequency device may be instruction information. This is not limited to this embodiment of the present application.

[0201] S440: The control device transmits the target downlink data to the extension device. Thus, in S440, the extension device receives the target downlink data from the control device.

[0202] S450: The extension device transmits target downlink data to the radio frequency device. Thus, in S450, the radio frequency device receives target downlink data from the extension device.

[0203] It should be noted that in S450, the control device transmits the target downlink data to all connected radio frequency devices, in other words, the control device transmits the target downlink data to both radio frequency devices configured to convey the target downlink data and radio frequency devices not configured to convey the target downlink data.

[0204] Optionally, if the augmentation device analyzes the instruction information received from the control device and determines, based on the instruction information, the radio frequency devices configured to transmit the target downlink data, in S450, the augmentation device may transmit the target downlink data only to the radio frequency devices configured to transmit the target downlink data.

[0205] S460: The radio frequency device determines whether to transmit the target downlink data according to the instruction.

[0206] After receiving the target downlink data from the extension device, the radio frequency device determines whether to transmit the target downlink data according to the instruction. If the radio frequency device determines to transmit the target downlink data according to the instruction, the radio frequency device transmits the target downlink data. If the radio frequency device determines not to transmit the target downlink data according to the instruction, the radio frequency device does not transmit the target downlink data.

[0207] In one possible implementation, if in S430 the extension device transmits the first command only to the radio frequency device configured to convey the target downlink data, in S460 the radio frequency device determines whether to transmit the target downlink data depending on whether the first command is received. If the radio frequency device receives the first command, the radio frequency device determines to transmit the target downlink data. If the radio frequency device does not receive the first command, the radio frequency device determines not to transmit the target downlink data.

[0208] In another possible implementation, if in S430 the extension device transmits the second command only to the radio frequency device that is not configured to transmit the target downlink data, in S460 the radio frequency device determines whether to transmit the target downlink data depending on whether the second command is received. If the radio frequency device receives the second command, the radio frequency device determines not to transmit the target downlink data. If the radio frequency device does not receive the second command, the radio frequency device determines to transmit the target downlink data.

[0209] In yet another possible implementation, if in S430 the extension device transmits a first instruction to a radio frequency device configured to transmit the target downlink data and transmits a second instruction to a radio frequency device not configured to transmit the target downlink data, in S460 the radio frequency device determines whether to transmit the target downlink data according to the received instruction. If the radio frequency device receives the first instruction, the radio frequency device determines to transmit the target downlink data. If the radio frequency device receives the second instruction, the radio frequency device determines not to transmit the target downlink data.

[0210] For example, if the first instruction and / or the second instruction sent by the extension device is instruction information, and the instruction information includes an identifier of a radio frequency device configured to transmit the target downlink data, in S460, the radio frequency device determines whether to transmit the target downlink data according to whether the instruction information includes an identifier of the radio frequency device. If the instruction information includes an identifier of the radio frequency device, it is equivalent to the radio frequency device receiving the first instruction, and the radio frequency device determines to transmit the target downlink data. If the instruction information does not include an identifier of the radio frequency device, it is equivalent to the radio frequency device receiving the second instruction, and the radio frequency device determines not to transmit the target downlink data.

[0211] As another example, if the first instruction and / or the second instruction sent by the extension device is instruction information, and the instruction information includes an identifier of a radio frequency device that is not configured to convey the target downlink data, in S460, the radio frequency device determines whether to transmit the target downlink data according to whether the instruction information includes an identifier of the radio frequency device. If the instruction information includes an identifier of the radio frequency device, it is the same as the radio frequency device receiving the second instruction, and the radio frequency device determines not to transmit the target downlink data. If the instruction information does not include an identifier of the radio frequency device, it is the same as the radio frequency device receiving the first instruction, and the radio frequency device determines to transmit the target downlink data.

[0212] As yet another example, when the first instruction and / or the second instruction sent by the extended device is instruction information and the instruction information includes N bits, in S460, the radio frequency device determines whether to transmit the target downlink data based on the bit corresponding to the radio frequency device among the N bits. If the bit corresponding to the radio frequency device among the N bits indicates to transmit the target downlink data, it is the same as the radio frequency device receiving the first instruction, and the radio frequency device determines to transmit the target downlink data. If the bit corresponding to the radio frequency device among the N bits indicates not to transmit the target downlink data, it is the same as the radio frequency device receiving the second instruction, and the radio frequency device determines not to transmit the target downlink data.

[0213] Optionally, if the instruction sent by the extension device to the radio frequency device in S430 indicates whether the radio frequency device is configured to communicate downlink data in each of a plurality of time units, then in S460, the radio frequency device determines whether the radio frequency device is configured to communicate the target downlink data in the target time unit according to the instruction. If the radio frequency device determines that the radio frequency device is configured to communicate the target downlink data in the target time unit, the radio frequency device determines to transmit the target downlink data. If the radio frequency device determines that the radio frequency device is not configured to communicate downlink data in the target time unit, the radio frequency device determines not to transmit the target downlink data.

[0214] For example, the radio frequency device is pRRU#2, and the instruction received by pRRU#2 commands it to transmit downlink data in TTI#1 and TTI#2, and indicates that pRRU#2 is not configured to transmit downlink data in TTI#3. In TTI#1, if pRRU#2 determines, according to the instruction, that pRRU#2 is configured to transmit downlink data in TTI#1, pRRU#2 determines to transmit the downlink data transmitted in TTI#1. In TTI#2, if pRRU#2 determines, according to the instruction, that pRRU#2 is configured to transmit downlink data in TTI#2, pRRU#2 determines to transmit the downlink data transmitted in TTI#2. In TTI#3, if pRRU#2 determines, according to the instruction, that pRRU#2 is not configured to transmit downlink data in TTI#3, pRRU#2 determines not to transmit the downlink data transmitted in TTI#3.

[0215] In this embodiment of the present application, the control device determines the serving radio frequency device of at least one terminal device configured to receive the target downlink data by polling the uplink signal or the downlink signal, and transmits the instruction information to the augmentation device, so that the augmentation device can transmit the first instruction to the radio frequency device configured to transmit the target downlink data and / or transmit the second instruction to the radio frequency device not configured to transmit the target downlink data. In this way, only the radio frequency device configured to transmit the target downlink data transmits the target downlink data. It can be understood that the terminal device configured to receive the target downlink data cannot receive the target downlink data from the radio frequency device not configured to transmit the target downlink data, since the radio frequency device not configured to transmit the target downlink data is not the serving radio frequency device of the terminal device configured to receive the target downlink data. Therefore, when the radio frequency device not configured to transmit the target downlink data does not transmit the target downlink data, an invalid transmission can be avoided, and the downlink power consumption can be reduced. If the radio frequency device not configured to transmit the target downlink data is adjacent to another cell, interference to the adjacent cell can be further avoided.

[0216] An embodiment of the present application further provides an uplink transmission method. The following describes the uplink transmission method provided in the embodiment of the present application with reference to Figures 5 and 6.

[0217] 5 is a schematic flowchart of an uplink transmission method according to an embodiment of the present application. As shown in FIG 5, the method 500 may include S510 to S540. These steps are described in detail below.

[0218] S510: The control device determines a serving radio frequency device of at least one terminal device that performs uplink transmission.

[0219] For example, the control device may be a BBU, BU, CU, or DU, and the radio frequency device may be an RRU, RU, pRRU, or AAU.

[0220] For a description of the serving radio frequency device of the terminal device, see S310.

[0221] For example, the control device determines a serving radio frequency device of at least one terminal device that performs a target uplink transmission. The target uplink transmission is an uplink transmission that is performed in a target time unit. In other words, the terminal device that performs the target uplink transmission is a terminal device that performs an uplink transmission in a target time unit. For a description of the time unit and the target time unit, please refer to S310.

[0222] As another example, the control device determines a serving radio frequency device of at least one terminal device that performs uplink transmission in a plurality of time units, the plurality of time units including a target time unit that performs a target uplink transmission. It should be noted that the terminal device that performs uplink transmission in each time unit of the plurality of time units may be different.

[0223] For the manner in which the control device determines the serving radio frequency device of at least one terminal device performing uplink transmission, please refer to S310.

[0224] S520: The control device transmits instruction information to the extension device. Thus, in S520, the extension device receives instruction information from the control device.

[0225] For example, the extension device may be a switch, a router, or an rHUB.

[0226] The indication information indicates a radio frequency device that performs the target uplink transmission. Since the uplink data transmitted by the at least one terminal device that performs the target uplink transmission needs to be transferred to the control device via the serving radio frequency device of the at least one terminal device, it should be understood that the radio frequency device that performs the target uplink transmission indicated by the indication information is the serving radio frequency device of the at least one terminal device that performs the target uplink transmission. In other words, the indication information indicates the serving radio frequency device of the at least one terminal device that performs the target uplink transmission.

[0227] In one possible implementation, at S510, when the control device determines a serving radio frequency device of at least one terminal device performing a target uplink transmission, the control device can determine the indication information based on the serving radio frequency device of the at least one terminal device performing the target uplink transmission.

[0228] In another possible implementation, in S510, when the control device determines a serving radio frequency device of at least one terminal device that performs uplink transmission in multiple time units, the control device can determine a serving radio frequency device of at least one terminal device that performs a target uplink transmission in the serving radio frequency device of the at least one terminal device that performs uplink transmission in multiple time units, and then the control device determines the indication information based on the serving radio frequency device of the at least one terminal device that performs the target uplink transmission.

[0229] The manner in which the instruction information instructs the radio frequency device to perform the target uplink transmission is the same as the manner in which the instruction information instructs the radio frequency device configured to convey the target downlink data in S310. For the sake of brevity, the details will not be described again in this embodiment of the present application.

[0230] Similarly, whether the indication information further indicates a target time unit in which to perform the target uplink transmission is not limited in this embodiment of the present application.

[0231] Optionally, in S510, when the control device determines a serving radio frequency device of at least one terminal device configured to perform uplink transmission in multiple time units, the instruction information can indicate at least one radio frequency device that performs uplink transmission in multiple time units. It should be understood that the at least one radio frequency device indicated by the instruction information is the serving radio frequency device of the at least one terminal device configured to perform uplink transmission in multiple time units, because the uplink data transmitted by the terminal device in multiple time units needs to be forwarded by the radio frequency device to the control device.

[0232] For example, at least one radio frequency device indicated by the indication information is configured to perform uplink transmission in all of the multiple time units. In other words, the radio frequency device that performs uplink transmission in all of the multiple time units is the same.

[0233] As another example, the instruction information may instruct a radio frequency device to perform uplink transmission in each of the plurality of time units, where the radio frequency device performing uplink transmission in a first time unit of the plurality of time units is a serving radio frequency device of a terminal device configured to perform uplink transmission in the first time unit, and the first time unit is any one of the plurality of time units.

[0234] The manner in which the instruction information instructs at least one radio frequency device to perform uplink transmission in multiple time units is the same as the manner in which the instruction information instructs at least one radio frequency device configured to convey downlink data in multiple time units in S310. For the sake of brevity, details will not be described again in this embodiment of the present application.

[0235] S530: The extension device receives a signal from at least one radio frequency device. Thus, in S530, the radio frequency device transmits a signal to the extension device.

[0236] It should be noted that in S530, the extension device can receive a signal from at least one radio frequency device connected to the extension device. For example, the extension device can receive a signal transmitted by a radio frequency device that performs a target uplink transmission, or can receive a signal transmitted by a radio frequency device that does not perform a target uplink transmission.

[0237] It should be understood that a radio frequency device that does not perform the intended uplink transmission is not a serving radio frequency device of a terminal device that performs the intended uplink transmission, and therefore the radio frequency device that does not perform the intended uplink transmission cannot receive the uplink data transmitted by the terminal device that performs the intended uplink transmission. Therefore, the signal transmitted by the radio frequency device that does not perform the intended uplink transmission to the extension device is the noise floor generated by the radio frequency device.

[0238] S540: The expansion device transmits an uplink signal to the control device. Thus, in S540, the control device receives the uplink signal from the expansion device.

[0239] The uplink signal is determined based on a signal received from a radio frequency device performing a target uplink transmission, for example, the control device performs radio frequency synthesis on the signal received from the radio frequency device performing a target uplink transmission to obtain the uplink signal.

[0240] In S520, if the instruction information received by the expansion device indicates only the radio frequency device performing the target uplink transmission, or if the instruction information received by the expansion device indicates at least one radio frequency device performing uplink transmission in multiple time units, and the at least one radio frequency device performs uplink transmission in all of the multiple time units, the expansion device determines, in the at least one radio frequency device, the radio frequency device indicated by the instruction information after receiving a signal from the at least one radio frequency device, and then determines the uplink signal based on the signal received from the radio frequency device indicated by the instruction information. In S520, if the instruction information received by the expansion device indicates a radio frequency device performing uplink transmission in each of the multiple time units, the expansion device first determines, in the at least one radio frequency device, the radio frequency device performing the target uplink transmission in the target time unit based on the instruction information after receiving a signal from the at least one radio frequency device, and then determines, in the at least one radio frequency device, the radio frequency device performing the target uplink transmission, and then determines the uplink signal based on the signal received from the radio frequency device performing the target uplink transmission.

[0241] In this embodiment of the present application, the control device determines the serving radio frequency device of at least one terminal device performing the intended uplink transmission by polling the uplink signal or the downlink signal, and sends instruction information to the extension device to instruct the extension device to report the signal received from the radio frequency device performing the intended uplink transmission, thereby preventing the extension device from reporting the signal received from the radio frequency device not performing the intended uplink transmission to the control device. It should be understood that the radio frequency device not performing the intended uplink transmission cannot receive uplink data from the terminal device performing the intended uplink transmission, because the radio frequency device not performing the intended uplink transmission is not the serving radio frequency device of the terminal device performing the intended uplink transmission. Therefore, the signal transmitted by the radio frequency device not performing the intended uplink transmission to the extension device is the noise floor generated by the radio frequency device. Therefore, the extension device does not report the signal received from the radio frequency device not performing the intended uplink transmission, so that the uplink noise floor and the uplink power consumption can be reduced.

[0242] 6 is a schematic flowchart of an uplink transmission method according to another embodiment of the present application. As shown in FIG. 6, the method 600 may include S610 to S660. The following describes these steps in detail.

[0243] S610: The control device determines a serving radio frequency device of at least one terminal device that performs uplink transmission.

[0244] Specifically, S610 is the same as S510 in method 500. For the sake of brevity, the details will not be described again in this embodiment of the present application.

[0245] S620: The control device transmits instruction information to the extension device. Thus, in S620, the extension device receives instruction information from the control device.

[0246] Specifically, S620 is the same as S520 in method 500. For the sake of brevity, the details will not be described again in this embodiment of the present application.

[0247] S630: The extension device transmits a command to the radio frequency device. Thus, in S630, the radio frequency device receives a command from the extension device.

[0248] This command instructs whether to perform the target uplink transmission.

[0249] In one possible implementation, the extending device sending instructions to the radio frequency device includes the extending device sending a first instruction to the radio frequency device to perform the intended uplink transmission and / or a second instruction to the radio frequency device not to perform the intended uplink transmission, the first instruction instructing the radio frequency device to perform the intended uplink transmission, and the second instruction instructing the radio frequency device not to perform the intended uplink transmission.

[0250] For example, in S620, if the instruction information received by the expansion device instructs a radio frequency device to perform a target uplink transmission, or if the instruction information received by the expansion device instructs at least one radio frequency device to perform an uplink transmission in multiple time units and the at least one radio frequency device performs an uplink transmission in all of the multiple time units, the expansion device can transmit a first instruction to the radio frequency device instructed by the instruction information and / or transmit a second instruction to the radio frequency device not instructed by the instruction information.

[0251] As another example, in S620, when the instruction information received by the expansion device instructs a radio frequency device to perform an uplink transmission in each of a plurality of time units, the expansion device first determines, based on the instruction information, a radio frequency device that performs a target uplink transmission in the target time unit, and then transmits a first instruction to the radio frequency device that performs the target uplink transmission in the target time unit and / or transmits a second instruction to the radio frequency device that does not perform the target uplink transmission in the target time unit.

[0252] The first instruction is not limited in this embodiment of the present application. For example, the extension device can generate the first instruction based on the instruction information. For example, the first instruction may be one bit of information. As another example, the first instruction is instruction information. Specifically, the extension device transmits the received instruction information to the radio frequency device performing the target uplink transmission. Similarly, the second instruction may also be generated by the extension device or may be instruction information.

[0253] It should be noted that although the first instruction commands the execution of a target uplink transmission, whether the first instruction further indicates a target time unit for executing the target uplink transmission is not limited in this embodiment of the present application.

[0254] For example, the first command does not indicate a target time unit. For example, the radio frequency device may, by default, consider the target time unit to be the time unit in which the augmented device receives the first command. In other words, the radio frequency device may, by default, consider the target uplink transmission to be an uplink transmission that is performed in the time unit in which the radio frequency device receives the first command. As another example, the radio frequency device may, by default, consider the target time unit to be a time unit after the time unit in which the radio frequency device receives the first command. In other words, the radio frequency device may, by default, consider the target uplink transmission to be an uplink transmission that is performed in the time unit after the time unit in which the radio frequency device receives the first command.

[0255] As another example, the first instruction indicates a target time unit, e.g., if the time unit is a slot, the first instruction further indicates a slot number of the target slot.

[0256] Similarly, whether the second command indicates a target time unit is not limited in this embodiment of the present application.

[0257] Optionally, in S620, if the instruction information received by the expansion device instructs the radio frequency device to perform an uplink transmission in each of the multiple time units, in S630, the instruction transmitted by the expansion device to the radio frequency device can instruct whether to perform an uplink transmission in each of the multiple time units.

[0258] S640: The radio frequency device determines whether to perform the intended uplink transmission according to the instruction.

[0259] When the radio frequency device has a signal to be transmitted to the extended device, the radio frequency device determines whether to perform the intended uplink transmission according to the instruction. When the radio frequency device determines to perform the intended uplink transmission according to the instruction, the radio frequency device transmits a signal to the extended device. When the radio frequency device determines not to perform the intended uplink transmission according to the instruction, the radio frequency device does not transmit a signal to the extended device. It should be noted that the intended uplink transmission is an uplink transmission performed in the intended time unit. Thus, when the radio frequency device has a signal to be transmitted to the extended device in the intended time unit, the radio frequency device determines whether to perform the intended uplink transmission according to the instruction.

[0260] In one possible implementation, if in S630 the extension device transmits the first command only to the radio frequency device configured to perform the intended uplink transmission, in S640 the radio frequency device determines whether to perform the intended uplink transmission depending on whether the first command is received. If the radio frequency device receives the first command, the radio frequency device determines to perform the intended uplink transmission. If the radio frequency device does not receive the first command, the radio frequency device determines not to perform the intended uplink transmission.

[0261] In another possible implementation, if in S630 the extension device transmits the second command only to the radio frequency device that does not perform the intended uplink transmission, in S640 the radio frequency device determines whether to perform the intended uplink transmission depending on whether the second command is received. If the radio frequency device receives the second command, the radio frequency device determines not to perform the intended uplink transmission. If the radio frequency device does not receive the second command, the radio frequency device determines to perform the intended uplink transmission.

[0262] In yet another possible implementation, if in S630 the extension device transmits a first command to the radio frequency device to perform the intended uplink transmission and transmits a second command to the radio frequency device not to perform the intended uplink transmission, in S640 the radio frequency device determines whether to perform the intended uplink transmission according to the received command. If the radio frequency device receives the first command, the radio frequency device determines to perform the intended uplink transmission. If the radio frequency device receives the second command, the radio frequency device determines not to perform the intended uplink transmission.

[0263] For example, if the first instruction and / or the second instruction transmitted by the extension device is instruction information, and the instruction information includes an identifier of the radio frequency device that performs the target uplink transmission, in S640, the radio frequency device determines whether to perform the target uplink transmission according to whether the instruction information includes an identifier of the radio frequency device. If the instruction information includes an identifier of the radio frequency device, it is equivalent to the radio frequency device receiving the first instruction, and the radio frequency device determines to perform the target uplink transmission. If the instruction information does not include an identifier of the radio frequency device, it is equivalent to the radio frequency device receiving the second instruction, and the radio frequency device determines not to perform the target uplink transmission.

[0264] As another example, if the first instruction and / or the second instruction transmitted by the extension device is instruction information, and the instruction information includes an identifier of the radio frequency device not to perform the intended uplink transmission, in S640, the radio frequency device determines whether to perform the intended uplink transmission according to whether the instruction information includes an identifier of the radio frequency device. If the instruction information includes an identifier of the radio frequency device, it is the same as the radio frequency device receiving the second instruction, and the radio frequency device determines not to perform the intended uplink transmission. If the instruction information does not include an identifier of the radio frequency device, it is the same as the radio frequency device receiving the first instruction, and the radio frequency device determines to perform the intended uplink transmission.

[0265] As yet another example, when the first instruction and / or the second instruction transmitted by the extended device is instruction information and the instruction information includes N bits, in S640, the radio frequency device determines whether to perform the target uplink transmission based on the bit corresponding to the radio frequency device among the N bits. If the bit corresponding to the radio frequency device among the N bits indicates to perform the target uplink transmission, it is equivalent to the radio frequency device receiving the first instruction, and the radio frequency device determines to perform the target uplink transmission. If the bit corresponding to the radio frequency device among the N bits indicates not to perform the target uplink transmission, it is equivalent to the radio frequency device receiving the second instruction, and the radio frequency device determines not to perform the target uplink transmission.

[0266] Optionally, in S630, if the instruction sent by the extension device to the radio frequency device instructs whether to perform an uplink transmission in each of a plurality of time units, in S640, the radio frequency device determines whether to perform a target uplink transmission in the target time unit according to the instruction. If the radio frequency device determines to perform the target uplink transmission in the target time unit, the radio frequency device determines to perform the target uplink transmission. If the radio frequency device determines not to perform the target uplink transmission in the target time unit, the radio frequency device determines not to perform the target uplink transmission.

[0267] S650: The extension device receives a signal from at least one radio frequency device. Thus, in S650, the radio frequency device transmits a signal to the extension device.

[0268] It should be noted that since the extension device transmits the second instruction to the radio frequency device that does not perform the target uplink transmission, or does not transmit the first instruction to the radio frequency device that does not perform the target uplink transmission, in S650, the radio frequency device that does not perform the target uplink transmission does not transmit a signal to the extension device. In other words, the extension device receives signals only from the radio frequency device that performs the target uplink transmission.

[0269] Uplink S660: The expansion device transmits an uplink signal to the control device. Thus, in S540, the control device receives an uplink signal from the expansion device.

[0270] The uplink signal is determined based on a signal received from a radio frequency device performing a target uplink transmission, for example, the control device performs radio frequency synthesis on the signal received from the radio frequency device performing a target uplink transmission to obtain the uplink signal.

[0271] It will be understood that, since the expansion device receives signals only from radio frequency devices that perform the target uplink transmission, in S660, the expansion device directly determines the uplink signal based on the signals received from at least one radio frequency device.

[0272] In this embodiment of the present application, the control device determines the serving radio frequency device of at least one terminal device performing the target uplink transmission by polling the uplink signal or the downlink signal, and sends the indication information to the extension device, so that the extension device can send a first instruction to the radio frequency device performing the target uplink transmission and / or send a second instruction to the radio frequency device not performing the target uplink transmission based on the indication information. In this way, only the radio frequency device performing the target uplink transmission transmits a signal to the extension device, so that the extension device does not report to the control device the signal received by the radio frequency device not performing the target uplink transmission. It should be understood that the radio frequency device not performing the target uplink transmission cannot receive uplink data from the terminal device performing the target uplink transmission, because the radio frequency device not performing the target uplink transmission is not the serving radio frequency device of the terminal device performing the target uplink transmission. Therefore, the signal transmitted by the radio frequency device not performing the target uplink transmission to the extension device is the noise floor generated by the radio frequency device. Thus, the uplink noise floor and uplink power consumption can be reduced because the enhancement device does not report signals received from radio frequency devices that do not perform intended uplink transmissions.

[0273] Above, the method provided in the embodiment of the present application has been described in detail with reference to Figures 3 to 6. Hereinafter, the device provided in the embodiment of the present application will be described in detail with reference to Figures 7 to 9. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment. Therefore, for the contents not described in detail, please refer to the above-mentioned method embodiment. For the sake of brevity, the details will not be described again here.

[0274] 7 is a schematic block diagram of an apparatus 700 according to an embodiment of the present application. As shown in the figure, the apparatus 700 may include a transceiver unit 710 and a processing unit 720.

[0275] In one possible design, the apparatus 700 may be an expansion device in the aforementioned method embodiments, or may be a chip configured to perform the functionality of the expansion device in the aforementioned method embodiments.

[0276] It should be understood that the apparatus 700 may correspond to the expansion device of the method 300, the method 400, the method 500, or the method 600 according to the embodiments of the present application. The apparatus 700 may include units configured to perform the method performed by the expansion device in the method 300 of FIG. 3, the method 400 of FIG. 4, the method 500 of FIG. 5, or the method 600 of FIG. 6. In addition, the units in the apparatus 700 and other operations and / or functions described above are for implementing the corresponding procedures in the method 300 of FIG. 3, the method 400 of FIG. 4, the method 500 of FIG. 5, or the method 600 of FIG. 6, respectively. It should be understood that the specific process in which the units perform the corresponding steps described above has been described in detail in the embodiments of the methods described above. For the sake of brevity, the details will not be described again here.

[0277] In one possible design, the apparatus 700 may be a radio frequency device in the aforementioned method embodiments, or may be a chip configured to perform the functions of a radio frequency device in the aforementioned method embodiments.

[0278] It should be understood that the apparatus 700 may correspond to the radio frequency device of the method 300, the method 400, the method 500, or the method 600 according to the embodiments of the present application. The apparatus 700 may include units configured to perform the method performed by the radio frequency device in the method 300 of FIG. 3, the method 400 of FIG. 4, the method 500 of FIG. 5, or the method 600 of FIG. 6. In addition, the units in the apparatus 700 and other operations and / or functions described above are for implementing the corresponding procedures in the method 300 of FIG. 3, the method 400 of FIG. 4, the method 500 of FIG. 5, or the method 600 of FIG. 6, respectively. It should be understood that the specific process of the units performing the corresponding steps described above has been described in detail in the embodiments of the methods described above. For the sake of brevity, the details will not be described again here.

[0279] In another possible design, the apparatus 700 may be a control device in the aforementioned method embodiments, or may be a chip configured to perform the functions of the control device in the aforementioned method embodiments.

[0280] It should be understood that the apparatus 700 may correspond to the control device of the method 300, the method 400, the method 500, or the method 600 according to the embodiments of the present application. The apparatus 700 may include units configured to execute the method executed by the control device in the method 300 of FIG. 3, the method 400 of FIG. 4, the method 500 of FIG. 5, or the method 600 of FIG. 6. In addition, the units in the apparatus 700 and other operations and / or functions described above are for implementing the corresponding procedures in the method 300 of FIG. 3, the method 400 of FIG. 4, the method 500 of FIG. 5, or the method 600 of FIG. 6, respectively. It should be understood that the specific process of the units performing the corresponding steps described above has been described in detail in the embodiments of the methods described above. For the sake of brevity, the details will not be described again here.

[0281] It should be further understood that the transceiver unit 710 in the apparatus 700 may correspond to the transceiver 820 in the apparatus 800 shown in FIG. 8, and the processing unit 720 in the apparatus 700 may correspond to the processor 810 in the apparatus 800 shown in FIG. 8.

[0282] It should be further understood that when the device 700 is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit may be an input / output circuit or a communication interface. The processing unit may be a processor, a microprocessor, or an integrated circuit integrated on a chip.

[0283] The transceiver unit 710 is configured to perform signal transmission and reception operations of the apparatus 700 , and the processing unit 720 is configured to perform signal processing operations of the apparatus 700 .

[0284] Optionally, the apparatus 700 further includes a storage unit 730, where the storage unit 730 is configured to store instructions.

[0285] 8 is a schematic block diagram of an apparatus 800 according to an embodiment of the present application. As shown in FIG. 8, the apparatus 800 includes at least one processor 810 and a transceiver 820. The processor 810 is coupled to a memory and configured to execute instructions stored in the memory to control the transceiver 820 to transmit signals and / or receive signals. Optionally, the apparatus 800 further includes a memory 830 configured to store instructions.

[0286] It should be understood that the processor 810 and the memory 830 may be integrated into one processing device. The processor 810 is configured to execute program codes stored in the memory 830 to perform the functions described above. In a specific implementation, the memory 830 may instead be integrated into the processor 810 or may be separate from the processor 810.

[0287] It should be further understood that the transceiver 820 may include a receiver and a transmitter. The transceiver 820 may further include an antenna. There may be one or more antennas. The transceiver 820 may be a communication interface or interface circuit.

[0288] When the device 800 is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit may be an input / output circuit or a communication interface. The processing unit may be a processor, a microprocessor, or an integrated circuit integrated on a chip.

[0289] FIG. 9 is a schematic diagram of a chip system according to an embodiment of the present application. The chip system may alternatively be a system including a circuit. The chip system 900 shown in FIG. 9 includes a logic circuit 910 and an input / output interface 920. The logic circuit is coupled to the input interface and configured to communicate data (e.g., first instruction information) through the input / output interface to perform the method of FIG. 3, FIG. 4, FIG. 5, or FIG. 6.

[0290] An embodiment of the present application further provides a processing device, including a processor and an interface. The processor may be configured to perform the method in the aforementioned method embodiments.

[0291] It should be understood that the processing device may be a chip, for example, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processing unit (CPU), a network processor (NP), a digital signal processor (DSP), a micro controller unit (MCU), a programmable logic device (PLD), or another integrated chip.

[0292] In the course of implementation, the steps of the aforementioned method can be completed by using integrated logic circuits of hardware in a processor, or by using instructions in the form of software. The steps of the method disclosed with reference to the embodiments of the present application may be directly executed and completed by a hardware processor, or may be executed and completed using a combination of hardware and software modules in a processor. The software modules may be disposed in a mature storage medium in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, or a register. The storage medium is disposed in the memory, and the processor reads the information in the memory and completes the steps of the aforementioned method in cooperation with the hardware in the processor. In order to avoid repetition, the details will not be described again here.

[0293] It should be noted that the processor in the embodiments of the present application may be an integrated circuit chip and has signal processing capabilities. In the course of implementation, the steps of the above-mentioned method embodiments can be completed by using integrated logic circuitry of hardware in the processor or by using instructions in the form of software. The processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or another programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. The processor can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor, or the processor may be any conventional processor, etc.

[0294] It will be understood that the memory in the embodiments of the present application may be volatile or non-volatile memory, or may include volatile and non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory may be random access memory (RAM) used as an external cache.

[0295] According to the method provided in the embodiment of the present application, the present application further provides a computer program product, which includes computer program code, which, when executed on a computer, enables the computer to perform any one of the methods of the embodiments shown in Figure 3, Figure 4, Figure 5, or Figure 6.

[0296] According to the method provided in the embodiment of the present application, the present application further provides a computer-readable medium, which stores a program code, which, when executed on a computer, enables the computer to perform any one of the methods of the embodiments shown in FIG. 3, FIG. 4, FIG. 5, or FIG. 6.

[0297] According to the method provided in the embodiment of the present application, the present application further provides a system, including the aforementioned radio frequency device, the aforementioned expansion device, and the aforementioned control device.

[0298] All or part of the above-mentioned embodiments may be implemented using software, hardware, firmware, or any combination thereof. When the embodiments are implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded into a computer and executed, the procedures or functions according to the embodiments of the present application are generated in whole or in part. The computer instructions may be stored in a computer-readable storage medium or may be transferred from one computer-readable storage medium to another. The computer-readable storage medium may be any available medium accessible by a computer or a data storage device, for example, a server or a data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk drive, or a magnetic tape), an optical medium (e.g., a digital video disc (DVD)), a semiconductor medium (e.g., a solid state disc (SSD)), etc.

[0299] In some embodiments provided in the present application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the above-mentioned device embodiment is only an example. For example, the division into units is only a logical division of functions, and may be divided differently in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not implemented. In addition, the shown or discussed mutual couplings or direct couplings or communication connections may be implemented through some interfaces. Indirect couplings or communication connections between devices or units may be implemented in electrical, mechanical, or other forms.

[0300] The above description is merely a specific implementation of the present application, and the protection scope of the present application is not limited thereto. Any modifications or replacements that are easily conceived by those skilled in the art within the technical scope disclosed in this application shall fall within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims. [Explanation of symbols]

[0301] 110 Control Device 120 Expansion Devices 131 Radio Frequency Devices 132 Radio Frequency Devices 133 Radio Frequency Devices 300 ways 400 ways 500 ways 600 ways 700 equipment 710 Transceiver Unit 720 Processing Unit 730 Storage Unit 800 equipment 810 Processor 820 Transceiver 830 Memory 900 Chip System 910 Logic Circuit 920 Input / Output Interface

Claims

1. 1. A downlink transmission method, comprising: receiving, by an extension device, indication information from a control device, the indication information indicating a radio frequency device configured to convey target downlink data, the radio frequency device configured to convey the target downlink data being a serving radio frequency device of at least one terminal device configured to receive the target downlink data; receiving, by the extension device, the target downlink data from the control device; transmitting, by the extension device, the target downlink data to the radio frequency device configured to convey the target downlink data based on the indication information; A method comprising:

2. The method of claim 1 , wherein the instruction information indicates which radio frequency devices are configured to communicate the intended downlink data for a intended unit of time.

3. 3. The method of claim 1, wherein the instruction information indicates at least one radio frequency device configured to convey downlink data in a plurality of time units, the plurality of time units including the target time unit for conveying the target downlink data, and the at least one radio frequency device is a serving radio frequency device of at least one terminal device configured to receive the downlink data in the plurality of time units.

4. 1. A downlink transmission method, comprising: receiving, by an extension device, indication information from a control device, the indication information indicating a radio frequency device configured to convey target downlink data, the radio frequency device configured to convey the target downlink data being a serving radio frequency device of at least one terminal device configured to receive the target downlink data; transmitting, by the extension device, a first instruction to the radio frequency device configured to convey the target downlink data and / or a second instruction to the radio frequency device not configured to convey the target downlink data, the first instruction instructing the radio frequency device to transmit the target downlink data and the second instruction instructing the radio frequency device not to transmit the target downlink data; receiving, by the extension device, the target downlink data from the control device; transmitting, by the extension device, the target downlink data to the radio frequency devices configured to communicate the target downlink data and to the radio frequency devices not configured to communicate the target downlink data; A method comprising:

5. The method of claim 4 , wherein the instruction information instructs the radio frequency device to communicate the intended downlink data for a intended unit of time.

6. 6. The method of claim 4 or 5, wherein the first instruction instructs to transmit the target downlink data communicated in the target time unit, and the second instruction instructs not to transmit the target downlink data communicated in the target time unit.

7. The indication information indicates at least one radio frequency device configured to convey downlink data in a plurality of time units, the plurality of time units including the target time unit for conveying the target downlink data, the at least one radio frequency device being a serving radio frequency device of at least one terminal device configured to receive the downlink data in the plurality of time units, and the method includes: determining, by the extension device, the radio frequency devices configured to convey the target downlink data and / or the radio frequency devices not configured to convey the target downlink data based on the indication information; 7. The method of claim 4, further comprising:

8. The instruction information indicates at least one radio frequency device configured to convey downlink data in a plurality of time units, the plurality of time units including the target time unit for conveying the target downlink data, and the at least one radio frequency device is a serving radio frequency device of at least one terminal device configured to receive the downlink data in the plurality of time units, and the step of transmitting, by the extension device, a first instruction to the radio frequency device configured to convey the target downlink data and / or a second instruction to the radio frequency device not configured to convey the target downlink data includes: transmitting, by the extension device, an instruction to a connected radio frequency device, the instruction instructing whether to transmit the downlink data conveyed in the plurality of time units; 7. The method according to any one of claims 4 to 6, comprising:

9. 1. A downlink transmission method, comprising: receiving, by the radio frequency device, an instruction from the extension device, the instruction instructing whether to transmit target downlink data; receiving, by the radio frequency device, the target downlink data from the extension device; determining, by the radio frequency device, whether to transmit the target downlink data in accordance with the instructions; A method comprising:

10. The method of claim 9 , wherein the instructions instruct transmitting the target downlink data conveyed in a target time unit.

11. 11. The method of claim 9 or 10, wherein the instructions instruct whether to transmit downlink data conveyed in a plurality of time units, the plurality of time units including the target time unit conveying the target downlink data.

12. 1. A downlink transmission method, comprising: determining, by the control device, a serving radio frequency device of at least one terminal device configured to receive the target downlink data; sending, by the control device, instruction information to an extension device, the instruction information instructing a radio frequency device configured to convey the target downlink data, the radio frequency device configured to convey the target downlink data being the serving radio frequency device of the at least one terminal device configured to receive the target downlink data; A method comprising:

13. The method of claim 12 , wherein the instruction information indicates which radio frequency devices are configured to communicate the target downlink data for a target unit of time.

14. The step of determining, by the control device, a serving radio frequency device of at least one terminal device configured to receive the target downlink data, comprises: determining, by the control device, a serving radio frequency device of at least one terminal device configured to receive downlink data conveyed in a plurality of time units, the plurality of time units including a target time unit conveying the target downlink data; Including, the indication information indicates at least one radio frequency device configured to convey the downlink data in the plurality of time units, the at least one radio frequency device being the serving radio frequency device of the at least one terminal device configured to receive the downlink data in the plurality of time units; The method of claim 12.

15. The method comprises: determining, by the control device, the serving radio frequency devices of the terminal devices configured to receive the target downlink data based on the power of an uplink signal received by each radio frequency device from the terminal devices configured to receive the target downlink data; 15. The method of any one of claims 12 to 14, further comprising:

16. The method comprises: determining, by the control device, the serving radio frequency device of the terminal device configured to receive the target downlink data based on a beam identifier reported by the terminal device configured to receive the target downlink data; 15. The method of any one of claims 12 to 14, further comprising:

17. An apparatus configured to carry out the method according to any one of claims 1 to 3 or configured to carry out the method according to any one of claims 4 to 8.

18. Apparatus configured to carry out the method according to any one of claims 9 to 11.

19. Apparatus configured to carry out the method according to any one of claims 12 to 16.

20. An apparatus comprising at least one processor, the at least one processor coupled to at least one memory, the at least one processor configured to execute computer programs or instructions stored in the at least one memory to enable the apparatus to perform the method according to any one of claims 1 to 3 or to enable the apparatus to perform the method according to any one of claims 4 to 8.

21. An apparatus comprising at least one processor, the at least one processor being coupled to at least one memory, the at least one processor being configured to execute computer programs or instructions stored in the at least one memory in order to enable the apparatus to perform the method according to any one of claims 9 to 11.

22. An apparatus comprising at least one processor, the at least one processor being coupled to at least one memory, the at least one processor being configured to execute computer programs or instructions stored in the at least one memory in order to enable the apparatus to perform a method according to any one of claims 12 to 16.

23. A system comprising an apparatus according to claims 17 to 19 or comprising an apparatus according to claims 20 to 22.

24. 17. A computer readable storage medium, the computer readable storage medium storing a computer program which, when executed, enables the method of any one of claims 1 to 16 to be performed.

25. 17. A computer program product comprising a computer program or instructions which, when executed on a processor, enable the processor to perform a method according to any one of claims 1 to 16.

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