Method and apparatus for downlink transmission

Abstract

The embodiment of the present application provides a kind of downlink transmission method and device. According to the method provided in the present application, control equipment determines the service radio frequency equipment of terminal equipment for receiving target downlink data, and sends indication information to extension equipment, indication information is used to indicate the radio frequency equipment for transmitting target downlink data, the radio frequency equipment for transmitting target downlink data is the service radio frequency equipment of terminal equipment for receiving target downlink data, and extension equipment can send the target downlink data according to indication information to the radio frequency equipment for transmitting target downlink data, or, extension equipment sends instruction for indicating sending target downlink data to the radio frequency equipment for transmitting target downlink data, and / or, to the radio frequency equipment for not transmitting target downlink data, send instruction for indicating not sending target downlink data, so as to facilitate the radio frequency equipment for not transmitting target downlink data not to send target downlink data, avoid invalid sending.

Description

Technical Field

[0001] This application relates to the field of communications, and more specifically, to a method and apparatus for downlink transmission. Background Technology

[0002] With the development of communication technology, indoor areas have become high-incidence areas for mobile services. In current indoor signal coverage technologies, a common base station structure employs a three-layer architecture: a baseband unit (BBU), a remote radio unit hub (rHUB), and a pico-remote radio unit (pRRU). One BBU can connect to one or more rHUBs, and one rHUB can connect to multiple pRRUs. In the downlink direction, the BBU performs baseband processing on the downlink data to be sent to the terminal and sends the processed downlink data to the rHUB. Upon receiving the downlink data, the rHUB copies it multiple times and sends each copy to the connected pRRU, which then forwards the downlink data to the terminal.

[0003] However, the aforementioned downlink transmission method can result in invalid transmissions and may also cause interference from neighboring cells. Summary of the Invention

[0004] This application provides a method and apparatus for downlink transmission, which can avoid invalid downlink transmission.

[0005] In a first aspect, a method for downlink transmission is provided, the method comprising: an extension device receiving indication information from a control device, the indication information indicating a radio frequency device for transmitting target downlink data, the radio frequency device for transmitting the target downlink data being a serving radio frequency device for at least one terminal device for receiving the target downlink data; the extension device receiving the target downlink data from the control device; and the extension device transmitting the target downlink data to the radio frequency device for transmitting the target downlink data according to the indication information.

[0006] Based on the above technical solution, the control device sends an instruction to the extension device, instructing the extension device to send the target downlink data to the radio frequency (RF) device used for transmitting the target downlink data. This ensures that only the RF device used for receiving the target downlink data can receive it. In cases where the RF device not used for transmitting the target downlink data cannot receive it, invalid transmissions can be avoided, and downlink power consumption can be reduced. If the RF device not used for transmitting the target downlink data is adjacent to other cells, interference to neighboring cells can also be avoided.

[0007] In conjunction with the first aspect, in some implementations of the first aspect, the indication information is used to indicate the radio frequency device used to transmit the target downlink data within the target time unit.

[0008] In conjunction with the first aspect, in some implementations of the first aspect, the indication information is used to indicate at least one radio frequency device for transmitting downlink data within a plurality of time units, the plurality of time units including a target time unit for transmitting the target downlink data, and the at least one radio frequency device being a serving radio frequency device for receiving downlink data from at least one terminal device within the plurality of time units.

[0009] In a second aspect, a downlink transmission method is provided, the method comprising: an extension device receiving indication information from a control device, the indication information indicating a radio frequency (RF) device for transmitting target downlink data, the RF device for transmitting the target downlink data being a serving RF device of at least one terminal device for receiving the target downlink data; the extension device sending a first instruction to the RF device for transmitting the target downlink data, and / or sending a second instruction to an RF device not for transmitting the target downlink data, the first instruction indicating transmission of the target downlink data, the second instruction indicating non-transmission of the target downlink data; the extension device receiving the target downlink data from the control device; and the extension device transmitting the target downlink data to both the RF device for transmitting the target downlink data and the RF device not for transmitting the target downlink data.

[0010] Based on the above technical solution, the control device sends instruction information to the extension device, enabling the extension device to send a first instruction to the radio frequency (RF) device used for transmitting the target downlink data, and / or to the RF device not used for transmitting the target downlink data, thereby ensuring that only the RF device used for transmitting the target downlink data transmits the target downlink data. When the RF device not used for transmitting the target downlink data does not transmit the target downlink data, invalid transmissions can be avoided, and downlink power consumption can be reduced. If the RF device not used for transmitting the target downlink data is adjacent to other cells, interference to neighboring cells can also be avoided.

[0011] In conjunction with the second aspect, in some implementations of the second aspect, the indication information is used to instruct radio frequency devices that transmit the target downlink data within the target time unit.

[0012] In conjunction with the second aspect, in some implementations of the second aspect, the first instruction is used to instruct the transmission of the target downlink data transmitted in the target time unit, and the second instruction is used to instruct the non-transmission of the target downlink data transmitted in the target time unit.

[0013] In conjunction with the second aspect, in some implementations of the second aspect, the indication information is used to indicate at least one radio frequency device for transmitting downlink data within a plurality of time units, the plurality of time units including a target time unit for transmitting the target downlink data, the at least one radio frequency device being a serving radio frequency device of at least one terminal device for receiving downlink data within the plurality of time units, the method further comprising: the extended device determining, based on the indication information, the radio frequency device for transmitting the target downlink data and / or the radio frequency device not for transmitting the target downlink data.

[0014] In conjunction with the second aspect, in certain implementations of the second aspect, the indication information is used to indicate at least one radio frequency device for transmitting downlink data within a plurality of time units, the plurality of time units including a target time unit for transmitting the target downlink data, and the at least one radio frequency device being a serving radio frequency device of at least one terminal device for receiving downlink data within the plurality of time units; the extended device sends a first instruction to the radio frequency device for transmitting the target downlink data, and / or sends a second instruction to the radio frequency device not for transmitting the target downlink data, including: the extended device sending an instruction to a connected radio frequency device, the instruction indicating whether to transmit downlink data within the plurality of time units.

[0015] Thirdly, a method for downlink transmission is provided, the method comprising: a radio frequency device receiving an instruction from an extended device, the instruction indicating whether to transmit target downlink data; the radio frequency device receiving the target downlink data from the extended device; and the radio frequency device determining whether to transmit the target downlink data according to the instruction.

[0016] Based on the above technical solution, the radio frequency (RF) device determines whether to transmit the target downlink data according to the instruction. This facilitates the transmission of the target downlink data by the serving RF device of the terminal device used only for receiving the target downlink data. If the RF device not used for transmitting the target downlink data does not transmit the target downlink data, invalid transmissions can be avoided, and downlink power consumption can be reduced. If the RF device not used for transmitting the target downlink data is adjacent to other cells, interference to neighboring cells can also be avoided.

[0017] In conjunction with the third aspect, in some implementations of the third aspect, the instruction is used to instruct the transmission of the target downlink data transmitted in the target time unit.

[0018] In conjunction with the third aspect, in some implementations of the third aspect, the instruction is used to indicate whether to send downlink data transmitted within a plurality of time units, the plurality of time units including a target time unit for transmitting the target downlink data.

[0019] Fourthly, a method for downlink transmission is provided, the method comprising: a control device determining a serving radio frequency device for at least one terminal device for receiving target downlink data; the control device sending indication information to an extension device, the indication information indicating a radio frequency device for transmitting the target downlink data, the radio frequency device for transmitting the target downlink data being a serving radio frequency device for at least one terminal device for receiving the target downlink data.

[0020] Based on the above technical solution, the control device determines the serving radio frequency device of the terminal device used to receive the target downlink data, and sends indication information to the extension device. The extension device can send the target downlink data to the radio frequency device used to transmit the target downlink data according to the indication information, or send an instruction to the radio frequency device used to transmit the target downlink data to instruct the transmission of the target downlink data, and / or send an instruction to the radio frequency device not used to transmit the target downlink data to instruct not to transmit the target downlink data. This helps to ensure that the radio frequency device not used to transmit the target downlink data does not transmit the target downlink data, avoids invalid transmission, and reduces downlink power consumption.

[0021] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the indication information is used to indicate the radio frequency device used to transmit the target downlink data within the target time unit.

[0022] In conjunction with the fourth aspect, in certain implementations of the fourth aspect, the control device determines a serving radio frequency device for at least one terminal device for receiving target downlink data, comprising: the control device determining a serving radio frequency device for at least one terminal device for receiving downlink data transmitted within a plurality of time units, the plurality of time units including a target time unit for transmitting the target downlink data; and the indication information indicating at least one radio frequency device for transmitting downlink data within the plurality of time units, the at least one radio frequency device being a serving radio frequency device for at least one terminal device for receiving downlink data within the plurality of time units.

[0023] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the method further includes: the control device determining the serving radio frequency device for receiving the target downlink data based on the power of the uplink signal received by each radio frequency device from the terminal device for receiving the target downlink data.

[0024] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the method further includes: the control device determining the serving radio frequency device for the terminal device receiving the target downlink data based on the beam identifier reported by the terminal device for receiving the target downlink data.

[0025] Fifthly, a method for uplink transmission is provided, the method comprising: an extension device receiving indication information from a control device, the indication information indicating 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 at least one terminal device performing the target uplink transmission; the extension device receiving a signal from the at least one radio frequency device performing the target uplink transmission; and the extension device transmitting 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.

[0026] Based on the above technical solution, the control device sends indication information to the extension device, instructing the extension device to report signals received from at least one radio frequency device performing the target uplink transmission, thereby preventing the extension device from reporting signals received from radio frequency devices that do not perform the target uplink transmission to the control device. The extension device's failure to report signals received from radio frequency devices that do not perform the target uplink transmission reduces uplink noise floor and uplink power consumption.

[0027] In conjunction with the fifth aspect, in some implementations of the fifth aspect, wherein the extended device receives signals from at least one radio frequency device performing the target uplink transmission, including: the extended device receiving signals from at least one radio frequency device performing the target uplink transmission and signals from radio frequency devices not performing the target uplink transmission.

[0028] In conjunction with the fifth aspect, in certain implementations of the fifth aspect, wherein the extended device receives a signal from at least one radio frequency device performing the target uplink transmission, the extended device receives only signals from at least one radio frequency device performing the target uplink transmission; the method further includes: the extended device sending an instruction to the at least one radio frequency device performing the target uplink transmission to instruct it to perform the target uplink transmission, and / or sending an instruction to a radio frequency device not performing the target uplink transmission to instruct it not to perform the target uplink transmission.

[0029] Based on the above technical solution, the control device sends indication information to the extension device, enabling the extension device to send instructions to the RF device performing the target uplink transmission, and / or to the RF device not performing the target uplink transmission, to instruct it not to perform the target uplink transmission. This ensures that only the RF device performing the target uplink transmission sends signals to the extension device, thus preventing the extension device from reporting signals received from RF devices not performing the target uplink transmission to the control device. By preventing the extension device from reporting signals received from RF devices not performing the target uplink transmission, uplink noise floor and uplink power consumption can be reduced.

[0030] In conjunction with the fifth aspect, in some implementations of the fifth aspect, the indication information is used to indicate at least one radio frequency device performing uplink transmission within at least one time unit, the at least one time unit including a target time unit for performing the target uplink transmission, and the at least one radio frequency device performing uplink transmission within the at least one time unit is a serving radio frequency device of at least one terminal device performing uplink transmission within the at least one time unit.

[0031] A sixth aspect provides a method for uplink transmission, the method comprising: a radio frequency device receiving an instruction sent by an extension device, the instruction indicating whether to perform a target uplink transmission; the radio frequency device determining whether to perform the target uplink transmission based on the instruction.

[0032] Based on the above technical solution, the radio frequency (RF) device determines whether to perform target uplink transmission according to the instruction. This facilitates the implementation of target uplink transmission by the serving RF device of the terminal device that is not performing target uplink transmission. If the serving RF device of the terminal device that is not performing target uplink transmission does not perform target uplink transmission, the uplink noise floor and uplink power consumption can be reduced.

[0033] In conjunction with the sixth aspect, in some implementations of the sixth aspect, the instruction is used to indicate whether an uplink transmission is to be performed within at least one time unit, the at least one time unit including a target time unit for performing the target uplink transmission.

[0034] A seventh aspect provides a method for uplink transmission, the method comprising: a control device determining a serving radio frequency device of at least one terminal device performing a target uplink transmission; the control device sending indication information to an extension device, the indication information indicating that the at least one radio frequency device performing the target uplink transmission is a serving radio frequency device of at least one terminal device performing the target uplink transmission.

[0035] Based on the above technical solution, the control device determines the serving radio frequency device of the terminal device performing the target uplink transmission and sends indication information to the extension device. The extension device can report the signal received from the radio frequency device performing the target uplink transmission according to the indication information, or the extension device sends an instruction to the radio frequency device performing the target uplink transmission to indicate that the target uplink transmission is being performed, and / or sends an instruction to the radio frequency device not performing the target uplink transmission to indicate that the target uplink transmission is not being performed. This helps to enable the control device to receive only the signal sent by the radio frequency device performing the target uplink transmission, reduce uplink noise floor, and reduce uplink power consumption.

[0036] In conjunction with the seventh aspect, in certain implementations of the seventh aspect, the control device determines a serving radio frequency device for at least one terminal device performing a target uplink transmission, comprising: the control device determining a serving radio frequency device for at least one terminal device performing uplink transmission within at least one time unit, the at least one time unit including a target time unit for performing the target uplink transmission; and the indication information being used to indicate that the at least one radio frequency device performing uplink transmission within the at least one time unit is a serving radio frequency device for at least one terminal device performing uplink transmission within the at least one time unit.

[0037] In conjunction with the seventh aspect, in some implementations of the seventh aspect, the method further includes: the control device determining the serving radio frequency device for the target uplink transmission terminal device based on the power of the uplink signal received by each radio frequency device from the target uplink transmission terminal device.

[0038] In conjunction with the seventh aspect, in some implementations of the seventh aspect, the method further includes: the control device determining the serving radio frequency device of the terminal device performing the target uplink transmission based on the beam identifier reported by the terminal device performing the target uplink transmission.

[0039] Eighthly, an apparatus is provided, comprising a transceiver unit configured to receive indication information from a control device, the indication information indicating a radio frequency device for transmitting target downlink data, the radio frequency device for transmitting the target downlink data being a serving radio frequency device of at least one terminal device for receiving the target downlink data; the transceiver unit is further configured to receive the target downlink data from the control device; and the transceiver unit is further configured to transmit the target downlink data to the radio frequency device for transmitting the target downlink data according to the indication information.

[0040] In conjunction with the eighth aspect, in some implementations of the eighth aspect, the indication information is used to indicate the radio frequency device used to transmit the target downlink data within the target time unit.

[0041] In conjunction with the eighth aspect, in some implementations of the eighth aspect, the indication information is used to indicate at least one radio frequency device for transmitting downlink data within a plurality of time units, the plurality of time units including a target time unit for transmitting the target downlink data, and the at least one radio frequency device being a serving radio frequency device for receiving downlink data from at least one terminal device within the plurality of time units.

[0042] A ninth aspect provides an apparatus comprising a transceiver unit configured to receive indication information from a control device, the indication information indicating a radio frequency (RF) device for transmitting target downlink data, the RF device for transmitting the target downlink data being a serving RF device of at least one terminal device for receiving the target downlink data; the transceiver unit is further configured to send a first instruction to the RF device for transmitting the target downlink data, and / or send a second instruction to an RF device not for transmitting the target downlink data, the first instruction indicating transmission of the target downlink data, the second instruction indicating non-transmission of 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 RF device for transmitting the target downlink data and the RF device not for transmitting the target downlink data.

[0043] In conjunction with the ninth aspect, in some implementations of the ninth aspect, the indication information is used to instruct radio frequency devices that transmit the target downlink data within the target time unit.

[0044] In conjunction with the ninth aspect, in some implementations of the ninth aspect, the first instruction is used to instruct the transmission of the target downlink data transmitted in the target time unit, and the second instruction is used to instruct the non-transmission of the target downlink data transmitted in the target time unit.

[0045] In conjunction with the ninth aspect, in certain implementations of the ninth aspect, the indication information is used to indicate at least one radio frequency device for transmitting downlink data within a plurality of time units, the plurality of time units including a target time unit for transmitting the target downlink data, the at least one radio frequency device being a serving radio frequency device of at least one terminal device for receiving downlink data within the plurality of time units, the apparatus further including a processing unit for determining, based on the indication information, the radio frequency device for transmitting the target downlink data and / or a radio frequency device not for transmitting the target downlink data.

[0046] In conjunction with the ninth aspect, in certain implementations of the ninth aspect, the indication information is used to indicate at least one radio frequency device for transmitting downlink data within a plurality of time units, the plurality of time units including a target time unit for transmitting the target downlink data, the at least one radio frequency device being a serving radio frequency device for receiving downlink data from at least one terminal device within the plurality of time units; the transceiver unit is further used to send an instruction to a connected radio frequency device, the instruction indicating whether to transmit the downlink data transmitted within the plurality of time units.

[0047] In a tenth aspect, an apparatus is provided, comprising a transceiver unit and a processing unit, the transceiver unit being configured to receive an instruction from an extension device, the instruction indicating whether to transmit target downlink data; the transceiver unit being further configured to receive the target downlink data from the extension device; and the processing unit being configured to determine whether to transmit the target downlink data based on the instruction.

[0048] In conjunction with the tenth aspect, in some implementations of the tenth aspect, the instruction is used to instruct the transmission of the target downlink data transmitted in the target time unit.

[0049] In conjunction with the tenth aspect, in some implementations of the tenth aspect, the instruction is used to indicate whether to send downlink data transmitted within a plurality of time units, the plurality of time units including a target time unit for transmitting the target downlink data.

[0050] Eleventhly, an apparatus is provided, comprising a transceiver unit and a processing unit, the processing unit being configured to determine a serving radio frequency device for at least one terminal device for receiving target downlink data; the transceiver unit being configured to send indication information to an extension device, the indication information being used to indicate that the radio frequency device for transmitting the target downlink data is a serving radio frequency device for at least one terminal device for receiving the target downlink data.

[0051] In conjunction with the eleventh aspect, in some implementations of the eleventh aspect, the indication information is used to indicate the radio frequency device used to transmit the target downlink data within the target time unit.

[0052] In conjunction with the eleventh aspect, in some implementations of the eleventh aspect, the processing unit is further configured to determine a serving radio frequency device for receiving downlink data transmitted within a plurality of time units, the plurality of time units including a target time unit for transmitting the target downlink data; the indication information is configured to indicate at least one radio frequency device for transmitting downlink data within the plurality of time units, the at least one radio frequency device being a serving radio frequency device for receiving downlink data within the plurality of time units.

[0053] In conjunction with the eleventh aspect, in some implementations of the eleventh aspect, the processing unit is further configured to determine the serving radio frequency device for receiving the target downlink data based on the power of the uplink signal received by each radio frequency device from the terminal device for receiving the target downlink data.

[0054] In conjunction with the eleventh aspect, in some implementations of the eleventh aspect, the processing unit is further configured to determine the serving radio frequency device of the terminal device for receiving the target downlink data based on the beam identifier reported by the terminal device for receiving the target downlink data.

[0055] In a twelfth aspect, an apparatus is provided, comprising a transceiver unit configured to receive indication information from a control device, the indication information indicating 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 at least one terminal device performing the target uplink transmission; the transceiver unit is further configured to receive signals from the at least one radio frequency device performing the target uplink transmission; and the transceiver unit is further configured to transmit an uplink signal to the control device, the uplink signal being determined based on signals received from the at least one radio frequency device performing the target uplink transmission.

[0056] In conjunction with the twelfth aspect, in some implementations of the twelfth aspect, the transceiver unit is further configured to receive signals from at least one radio frequency device performing the target uplink transmission and signals from radio frequency devices not performing the target uplink transmission.

[0057] In conjunction with the twelfth aspect, in some implementations of the twelfth aspect, the transceiver unit is further configured to receive only signals from at least one radio frequency device performing the target uplink transmission; the transceiver unit is further configured to send an instruction to at least one radio frequency device performing the target uplink transmission to instruct the performing target uplink transmission, and / or, send an instruction to a radio frequency device not performing the target uplink transmission to instruct it not to perform the target uplink transmission.

[0058] In conjunction with the twelfth aspect, in some implementations of the twelfth aspect, the indication information is used to indicate at least one radio frequency device performing uplink transmission within at least one time unit, the at least one time unit including a target time unit for performing the target uplink transmission, and the at least one radio frequency device performing uplink transmission within the at least one time unit is a serving radio frequency device of at least one terminal device performing uplink transmission within the at least one time unit.

[0059] In a thirteenth aspect, an apparatus is provided, comprising a transceiver unit and a processing unit, the transceiver unit being configured to receive an instruction sent by an extension device, the instruction indicating whether to perform a target uplink transmission; the processing unit being configured to determine whether to perform the target uplink transmission based on the instruction.

[0060] In conjunction with aspect thirteen, in some implementations of aspect thirteen, the instruction is used to indicate whether an uplink transmission is to be performed within at least one time unit, the at least one time unit including a target time unit for performing the target uplink transmission.

[0061] In a fourteenth aspect, an apparatus is provided, comprising a transceiver unit and a processing unit, the processing unit being configured to determine a serving radio frequency device of at least one terminal device performing a target uplink transmission; the transceiver unit being configured to send indication information to an extension device, the indication information being used to indicate that the at least one radio frequency device performing the target uplink transmission is a serving radio frequency device of at least one terminal device performing the target uplink transmission.

[0062] In conjunction with 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 within at least one time unit, the at least one time unit including a target time unit for performing the target uplink transmission; the indication information is used to indicate at least one radio frequency device performing uplink transmission within the at least one time unit, the at least one radio frequency device performing uplink transmission within the at least one time unit being a serving radio frequency device of at least one terminal device performing uplink transmission within the at least one time unit.

[0063] In conjunction with the fourteenth aspect, in some implementations of the fourteenth aspect, the processing unit is further configured to determine the serving radio frequency device for the target uplink transmission terminal device based on the power of the uplink signal received by each radio frequency device from the target uplink transmission terminal device.

[0064] In conjunction with the fourteenth aspect, in some implementations of the fourteenth aspect, the processing unit is further configured to determine the serving radio frequency device of the terminal device performing the target uplink transmission based on the beam identifier reported by the terminal device performing the target uplink transmission.

[0065] In a fifteenth aspect, this application provides an apparatus including a processor. The processor is coupled to a memory and can be used to execute instructions in the memory to implement the methods of the first aspect or any possible implementation thereof, or to implement the methods of the second aspect or any possible implementation thereof, or to implement the methods of the fifth aspect or any possible implementation thereof. The apparatus further includes a memory. The apparatus also includes a communication interface, and the processor is coupled to the communication interface.

[0066] In one implementation, the device is an extension device. When the device is an extension device, the communication interface can be a transceiver, or an input / output interface.

[0067] In another implementation, the device is a chip or chip system configured in an expansion device. When the device is a chip or chip system configured in an expansion device, the communication interface can be an input / output interface.

[0068] The transceiver can be a transceiver circuit. The input / output interface can be an input / output circuit.

[0069] In a sixteenth aspect, this application provides an apparatus including a processor. The processor is coupled to a memory and can be used to execute instructions in the memory to implement the methods in the third aspect or any possible implementation of the third aspect, or to implement the methods in the sixth aspect or any possible implementation of the sixth aspect. The apparatus further includes a memory. The apparatus also includes a communication interface, to which the processor is coupled.

[0070] In one implementation, the device is a radio frequency (RF) device. When the device is an RF device, the communication interface can be a transceiver or an input / output interface.

[0071] In another implementation, the device is a chip or chip system configured in a radio frequency (RF) device. When the device is a chip or chip system configured in an RF device, the communication interface can be an input / output interface.

[0072] The transceiver can be a transceiver circuit. The input / output interface can be an input / output circuit.

[0073] In a seventeenth aspect, this application provides an apparatus including a processor. The processor is coupled to a memory and can be used to execute instructions in the memory to implement the methods in the fourth aspect or any possible implementation of the fourth aspect, or to implement the methods in the seventh aspect or any possible implementation of the seventh aspect. The apparatus further includes a memory. The apparatus also includes a communication interface, to which the processor is coupled.

[0074] In one implementation, the device is a control device. When the device is a control device, the communication interface can be a transceiver, or an input / output interface.

[0075] In another implementation, the device is a chip or chip system configured in a control device. When the device is a chip or chip system configured in a control device, the communication interface can be an input / output interface.

[0076] The transceiver can be a transceiver circuit. The input / output interface can be an input / output circuit.

[0077] In an eighteenth aspect, this application provides a processor, including: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive signals through the input circuit and transmit signals through the output circuit, causing the processor to perform the methods described in the foregoing aspects.

[0078] In specific implementation, the processor can be a chip, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, gate circuit, flip-flop, and various logic circuits. The input signal received by the input circuit can be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit can be output to, for example, but not limited to, a transmitter and transmitted by the transmitter. Furthermore, the input circuit and the output circuit can be the same circuit, which is used as the input circuit and the output circuit at different times. This application does not limit the specific implementation of the processor and various circuits.

[0079] In a nineteenth aspect, this application provides a processing apparatus including a communication interface and a processor. The communication interface is coupled to the processor. The communication interface is used for inputting and / or outputting information. The information includes at least one of instructions or data. The processor is used to execute a computer program to cause the processing apparatus to perform the methods described in the foregoing aspects.

[0080] In a twentieth aspect, this application provides a processing apparatus including a processor and a memory. The processor is configured to read instructions stored in the memory and to receive signals via a receiver and transmit signals via a transmitter, thereby causing the processing apparatus to perform the methods described in the foregoing aspects.

[0081] Optionally, there may be one or more processors. If memory is available, there may also be one or more memories.

[0082] Optionally, the memory may be integrated with the processor, or the memory may be separated from the processor.

[0083] In specific implementation, the memory can be a non-transitory memory, such as read-only memory (ROM), which can be integrated with the processor on the same chip or set on different chips. The embodiments of this application do not limit the type of memory or the way the memory and processor are set.

[0084] It should be understood that the relevant information exchange process, such as sending instruction information, can be a process of outputting instruction information from the processor, and receiving instruction information can be a process of inputting received instruction information into the processor. Specifically, the information output by the processor can be sent to the transmitter, and the input information received by the processor can come from the receiver. Here, the transmitter and receiver can be collectively referred to as a transceiver.

[0085] The device in the nineteenth and twentieth aspects above can be a chip. The processor can be implemented in hardware or software. When implemented in hardware, the processor can be a logic circuit, integrated circuit, etc. When implemented in software, the processor can be a general-purpose processor that reads software code stored in a memory. The memory can be integrated into the processor or located outside the processor and exist independently.

[0086] In a twentieth aspect, this application provides a computer program product comprising: a computer program (also referred to as code or instructions) that, when run, causes a computer to perform the methods described in the foregoing aspects.

[0087] In a twentieth aspect, this application provides a computer-readable storage medium storing a computer program (also referred to as code or instructions) that, when run on a computer, causes the computer to perform the methods described in the foregoing aspects.

[0088] In a twentieth aspect, this application provides a system including the aforementioned control device, expansion device, and radio frequency device. Attached Figure Description

[0089] Figure 1 This is a schematic diagram of a system applicable to the methods provided in the embodiments of this application;

[0090] Figure 2 This is a schematic diagram of downlink transmission;

[0091] Figure 3 This is a schematic flowchart of the downlink transmission method provided in the embodiments of this application;

[0092] Figure 4 This is a schematic flowchart of a downlink transmission method provided in another embodiment of this application;

[0093] Figure 5 This is a schematic flowchart of the uplink transmission method provided in the embodiments of this application;

[0094] Figure 6 This is a schematic flowchart of an uplink transmission method provided in another embodiment of this application;

[0095] Figure 7 This is a schematic block diagram of the device provided in the embodiments of this application;

[0096] Figure 8 This is a schematic structural diagram of the device provided in the embodiments of this application;

[0097] Figure 9 This is a schematic diagram of the chip system provided in the embodiments of this application. Detailed Implementation

[0098] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0099] The technical solutions of this application can be applied to various communication systems, such as: Long Term Evolution (LTE) systems, Frequency Division Duplex (FDD) systems, Time Division Duplex (TDD) systems, Worldwide Interoperability for Microwave Access (WiMAX) communication systems, 5th Generation (5G) systems or New Radio (NR) systems, 6th Generation (6G) systems, or future communication systems. The 5G communication systems described in this application include non-standalone (NSA) 5G mobile communication systems and standalone (SA) 5G mobile communication systems. The communication system can also be a public landmobile 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 unrewed aerial vehicle (UAV) communication system, or other communication systems.

[0100] In the embodiments of this application, the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user apparatus.

[0101] Terminal devices can be devices that provide voice / data connectivity to users, such as handheld devices with wireless connectivity, in-vehicle devices, etc. Currently, some examples of terminals include: mobile phones, tablets, computers with wireless transceiver capabilities (such as laptops, PDAs, etc.), mobile internet devices (MIDs), virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, and personal digital assistants (PDAs). PDA (Power Assistant), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to a wireless modem, in-vehicle devices, wearable devices, terminal devices in 5G networks or terminal devices in future public land mobile networks (PLMNs), etc.

[0102] Wearable devices, also known as wearable smart devices, are a general term for devices that utilize wearable technology to intelligently design and develop everyday wearables, such as glasses, gloves, watches, clothing, and shoes. Wearable devices are portable devices worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not merely hardware devices; they achieve powerful functions through software support, data interaction, and cloud interaction. Broadly defined, wearable smart devices include those with comprehensive functions, large sizes, and the ability to perform complete or partial functions without relying on a smartphone, such as smartwatches or smart glasses. They also include devices focused on a specific application function that require the use of other devices, such as smart bracelets and smart jewelry for vital sign monitoring.

[0103] Furthermore, terminal devices can also be terminal devices within an Internet of Things (IoT) system. IoT is a crucial component of future information technology development, its main technical characteristic being the connection of objects to networks via communication technologies, thereby achieving intelligent networks that enable human-machine and machine-to-machine interconnection. IoT technology can achieve massive connectivity, deep coverage, and low terminal power consumption through technologies such as narrowband (NB) technology.

[0104] In addition, terminal devices may also include sensors such as smart printers, train detectors, and gas stations. Their main functions include collecting data (for some terminal devices), receiving control information and downlink data from network devices, and sending electromagnetic waves to transmit uplink data to network devices.

[0105] In the description of this application, unless otherwise stated, " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B can mean A or B. "And / or" in this application is merely a description of the relationship between the related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural. Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural 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, a and b and c, where a, b, and c can be single or multiple.

[0106] Furthermore, to facilitate a clear description of the technical solutions in the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish identical or similar items with substantially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and that "first" and "second" are not necessarily different. Meanwhile, in the embodiments of this application, words such as "exemplarily" or "for example" are used to indicate that something is being used as an example, illustration, or explanation. Any embodiment or design scheme described as "exemplarily" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of words such as "exemplarily" or "for example" is intended to present related concepts in a concrete manner for ease of understanding.

[0107] Furthermore, the network architecture and business scenarios described in the embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0108] To facilitate understanding of the embodiments of this application, firstly, in conjunction with Figure 1 This application describes in detail one application scenario of the embodiments of this application.

[0109] Figure 1 This is the system architecture applicable to the methods provided in the embodiments of this application. For example... Figure 1 As shown, the system includes at least one control device, such as Figure 1 The control device 110 shown is included in the system. The system also includes at least one expansion device, such as... Figure 1 The expansion device 120 shown is included in the diagram. The system also includes at least two radio frequency devices, such as... Figure 1 Radio frequency devices 131, 132 and 133 are shown.

[0110] The control device 110 can serve as the main device of the base station, process digital baseband signals, and provide control and management of the functions of various devices in the base station.

[0111] The expansion unit 120 is connected to the control device 110 via optical fiber and to radio frequency devices 131 to 133 via network cables. The expansion unit 120 provides data aggregation and distribution functions for communication between the control device 110 and the radio frequency devices 131 to 133. For example, in the uplink direction, the expansion unit 120 receives uplink signals from the radio frequency devices 131 to 133, performs radio frequency combining on the received uplink signals, and then sends them to the control device 110. Similarly, in the downlink direction, the expansion unit 120 receives downlink signals sent by the control device 110 and sends the downlink signals to all connected radio frequency devices, i.e., to radio frequency devices 131 to 133.

[0112] Radio frequency devices 131 to 133 can serve as radio frequency modules for a base station, and can be used to process intermediate frequency signals and / or radio frequency signals, and can also be used to receive and transmit wireless signals. Optionally, radio frequency devices 131 to 133 can be used to process baseband digital signals, such as performing a fast Fourier transform (FFT) on the baseband digital signals.

[0113] It should be noted that the embodiments of this application do not limit the specific types of control devices, expansion devices, and radio frequency devices. For example, control device 110 can be any of the following: a baseband unit (BBU), a distributed unit (DU), or a centralized unit (CU). For example, expansion device can be any of the following: a switch, a router, or a remote radio unit hub (RHUB). For example, radio frequency devices 131 to 133 can be any of the following: a radiooremote unit (RRU), a radio unit (RU), an active antenna unit (AAU), or a pico radio remote unit (pRRU).

[0114] In some deployments, control device 110 may include a centralized unit (CU) and a DU, wherein the DU is connected to extension device 120 via optical fiber. Furthermore, the CU may also employ a separate control plane (CP) and user plane (UP) architecture, meaning the CU may include a CU-CP entity and a CU-UP entity.

[0115] It should also be noted that, Figure 1 Taking the connection of control device 110 to one expansion device 120 as an example, control device 110 can also be connected to more expansion devices. Furthermore, Figure 1 Taking the expansion device 120 as an example, which is connected to three radio frequency devices (radio frequency devices 131 to 133), the expansion device 120 can also be connected to more radio frequency devices.

[0116] exist Figure 1 In the system shown, during downlink transmission, extension device 120 forwards the downlink data sent by control device 110 to all connected radio frequency devices (i.e., radio frequency devices 131 to 133), and all radio frequency devices then transmit the received downlink data. However, as Figure 2 As shown, the downlink data sent by the control device may only be sent to users within the coverage area of ​​a certain radio frequency device (e.g., RRU) in cell 1. Therefore, the downlink data sent by other radio frequency devices will result in invalid transmission. In addition, it may also cause interference to the neighboring cell 2.

[0117] In view of this, embodiments of this application provide a downlink transmission method in order to reduce downlink transmission power consumption and reduce interference to neighboring cells.

[0118] Figure 3 A schematic flowchart of the downlink transmission method provided in an embodiment of this application is shown, such as... Figure 3 As shown, method 300 may include steps S310 to S340, each of which is described in detail below.

[0119] S310, The control device determines the serving radio frequency device for the terminal device used to receive downlink data.

[0120] 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.

[0121] The serving radio frequency (RF) device of a terminal device refers to an RF device that has a communication connection with the terminal device. When the RF device and the terminal device have a communication connection, the RF device and the terminal device can communicate. For example, the RF device can send downlink data received from the control device to the terminal device. Or, for example, the RF device can receive uplink data from the terminal device.

[0122] For example, the control device determines a serving radio frequency device for at least one terminal device used to receive target downlink data. The target downlink data is downlink data transmitted within a target time unit. In other words, the terminal device used to receive the target downlink data is a terminal device used to receive downlink data within the target time unit.

[0123] It should be noted that the term "target time unit" is introduced for the convenience of explaining the technical solutions of the embodiments of this application. The target time unit can be any time unit and does not refer to a specific time unit. For example, the target time unit refers to the current time unit.

[0124] It should also be noted that the time unit is not limited in the embodiments of this application. For example, the time unit can be any of the following: second (s), millisecond (ms), frame, subframe, slot, symbol, or transmission time interval (TTI). For example, if the target time unit refers to the current time and the time unit is TTI, then the downlink scheduling terminal device can be the terminal device that is downlink scheduled in the current TTI.

[0125] For example, the control device determines a serving radio frequency device for at least one terminal device to receive downlink data within a plurality of time units. The plurality of time units includes a target time unit for transmitting the target downlink data. It should be noted that the terminal device for receiving downlink data may differ within different time units of the plurality of time units. For example, the plurality of TTIs may include TTI#1, TTI#2, and TTI#3; the terminal device for receiving downlink data in TTI#1 may include UE#1; the terminal devices for receiving downlink data in TTI#2 may include UE#1 and UE#2; and the terminal device for receiving downlink data in TTI#3 may include UE#3.

[0126] This application does not limit the method by which the control device determines the serving radio frequency device of the terminal device.

[0127] In one possible implementation, the control device determines the serving radio frequency device of the terminal device by polling with uplink signals. The uplink signals can be demodulation reference signals (DMRS), sounding reference signals (SRS), signals transmitted on the physical random access channel (PRACH), or signals transmitted on the physical uplink control channel (PUCCH).

[0128] The following example, using an uplink SRS signal as an example, illustrates how the control device determines the serving radio frequency device of the terminal device through uplink signal polling.

[0129] Step 1: After the terminal device accesses the network, the access network device will configure SRS resources for the terminal device. Accordingly, the terminal device can send SRS signals on the allocated SRS resources.

[0130] Step 2: The control device sends instructions to receive SRS signals reported by only one or a subset of radio frequency (RF) devices at any given time, and to receive SRS signals reported by different RF devices at different times. For example, the control device sends instructions to receive only the SRS signal reported by RF device #1 at time #1, only the SRS signal reported by RF device #2 at time #2, and only the SRS signal reported by RF device #3 at time #3. In each time period, the terminal device sends one SRS signal. Exemplarily, each time period is represented by one SRS symbol.

[0131] For example, the control device sends instructions to the extension device, causing the extension device to forward only the SRS signals reported by one or a portion of the radio frequency (RF) devices to the control device at a given time, and the extension device to forward SRS signals reported by different RF devices to the control device at different times. Specifically, the control device sends instructions to the extension device to indicate the RF devices used to report SRS signals at different times. Accordingly, based on the instructions received from the control device, the extension device forwards only the signals reported by the RF devices used to report SRS signals at that time to the control device at a given time. For example, if the control device sends an instruction to the extension device to indicate that the RF device used to report SRS signals at time #1 is RF device #1, then the extension device will forward only the SRS signals reported by RF device #1 to the control device at time #1.

[0132] For example, the control device sends instructions to each radio frequency (RF) device via the extension device, so that only one or a portion of the RF devices report the received SRS at any given time, and different RF devices report the received SRS signals at different times. For instance, if the control device sends an instruction to RF device #1 via the extension device to instruct RF device #1 to report the received SRS at time #1, then only RF device #1 will report the received SRS signal to the control device via the extension device at time #1.

[0133] Step 3: The control device determines the serving radio frequency (RF) device for the terminal device based on the power of the SRS signal reported by each RF device. For example, the control device determines that the serving RF device for the terminal device is the RF device reporting the strongest SRS signal power. For instance, if the control device detects the power of the SRS signals reported by RF devices #1 to #3 and determines that the SRS signal reported by RF device #1 has the strongest power, then the control device determines that the serving RF device for the terminal device is RF device #1. Alternatively, the control device determines that the serving RF device for the terminal device is the RF device whose reported SRS signal power exceeds a power threshold. For instance, if the control device detects the power of the SRS signals reported by RF devices #1 to #3 and determines that the power of the signal reported by RF device #1 exceeds a power threshold, and the power of the SRS signal reported by RF device #2 also exceeds a power threshold, then the control device determines that the serving RF devices for the terminal device are RF devices #1 and #2.

[0134] In one possible implementation, the control device determines the serving radio frequency device of the terminal device by polling with downlink signals. The downlink signals can be channel state information reference signals (CSI-RS) or synchronization signals and physical broadcast channel blocks (SSBs).

[0135] The following example, using a CSI-RS downlink signal, illustrates how the control device determines the serving radio frequency device of the terminal device through downlink signal polling.

[0136] Step 1: After the terminal device accesses the network, the control device can configure CSI-RS resources for the terminal device. Accordingly, the terminal device can receive CSI-RS signals from the control device on the allocated CSI-RS resources.

[0137] Step 2: The control device sends instructions to ensure that only one or a subset of radio frequency (RF) devices transmit CSI-RS signals at any given time, and that different RF devices transmit the CSI-RS signals received from the control device at different times. For example, the control device sends instructions to ensure that only RF device #1 transmits a CSI-RS signal at time #1, only RF device #2 transmits a CSI-RS signal at time #2, and only RF device #3 transmits a CSI-RS signal at time #3. At any given time, each RF device transmits a CSI-RS signal at least once. It should also be noted that the beam identifiers of the CSI-RS signals transmitted by different RF devices are different.

[0138] For example, the control device sends instructions to the extension device to cause the extension device to forward CSI-RS signals to only one or a portion of the radio frequency (RF) devices at a given time, and to forward CSI-RS signals to different RF devices at different times. Specifically, the control device sends instructions to the extension device to indicate the RF devices used to transmit CSI-RS signals at different times. Accordingly, based on the instructions received from the control device, the extension device transmits CSI-RS signals only to the RF devices used to transmit CSI-RS signals at a given time. For example, if the control device sends instructions to the extension device to indicate that the RF device used to transmit CSI-RS signals at time #1 is RF device #1, then the extension device will only forward the CSI-RS signals received from the control device to RF device #1 at time #1.

[0139] For example, the control device sends instructions to each radio frequency device via the extension device so that only one or a portion of the radio frequency devices transmits a CSI-RS signal at any given time. For instance, if the control device sends an instruction to radio frequency device #1 via the extension device to instruct radio frequency device #1 to transmit a CSI-RS signal at time #1, then only radio frequency device #1 transmits a CSI-RS signal at time #1.

[0140] 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 signal sent by radio frequency device #1, then the control device determines that the serving radio frequency device of the terminal device is radio frequency device #1.

[0141] Optionally, the control device can configure a measurement report for the terminal device, which can be used to periodically or non-periodically report the beam identifier for transmitting CSI-RS signals.

[0142] This application embodiment does not limit the timing of the control device determining the serving radio frequency device for at least one terminal device used to receive downlink data.

[0143] 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. Further, after determining at least one terminal device for receiving downlink data, the control device can directly determine the serving radio frequency device of the at least one terminal device for receiving downlink data without performing further uplink signal polling or downlink signal polling. For instance, if UE#1, UE#2, and UE#3 exist within the coverage area of ​​the control device, 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, if the control device determines that at least one terminal device used to receive downlink data includes UE#1 and UE#2, the control device no longer needs to perform uplink signal polling or downlink signal polling, but can directly determine the serving radio frequency device of UE#1 and UE#2.

[0144] It should be noted that the embodiments of this application are not limited to determining the serving radio frequency device of the terminal device only when the terminal device accesses the network. If the terminal device is always within the coverage area of ​​the control device, the control device can perform uplink signal polling or downlink signal polling multiple times to dynamically determine the serving radio frequency device of the terminal device. For example, the control device can periodically perform uplink signal polling or periodically perform downlink signal polling to periodically determine the serving radio frequency device of the terminal device. Alternatively, the control device can perform uplink signal polling or downlink signal polling non-periodically to non-periodically determine the serving radio frequency device of the terminal device.

[0145] For example, after determining at least one terminal device for receiving downlink data, the control device further determines the serving radio frequency device for receiving downlink data by performing uplink signal polling or downlink signal polling. For instance, if UE#1, UE#2, and UE#3 exist within the coverage area of ​​the control device, and the control device determines that at least one terminal device for receiving downlink data includes UE#1 and UE#2, then the control device determines the serving radio frequency device for UE#1 and UE#2 by performing uplink signal polling or downlink signal polling. Since UE#3 is not used to receive downlink data, the control device may not determine the serving radio frequency device for UE#3.

[0146] In step S320, the control device sends instruction information to the extension device. Correspondingly, in step S320, the extension device receives the instruction information from the control device.

[0147] For example, the expansion device can be a switch, router, or rHUB.

[0148] The indication information is used to indicate the radio frequency (RF) device used for transmitting the target downlink data. It can be understood that since the target downlink data transmitted by the control device needs to be forwarded to at least one terminal device by a serving RF device used to receive the target downlink data, the RF device indicated by the indication information for transmitting the target downlink data is the serving RF device used to receive the target downlink data from at least one terminal device. In other words, the indication information is used to indicate the serving RF device used to receive the target downlink data from at least one terminal device.

[0149] In one possible implementation, if in S310 the control device determines the serving radio frequency device of at least one terminal device for receiving target downlink data, the control device can determine indication information based on the serving radio frequency device of the at least one terminal device for receiving target downlink data.

[0150] In another possible implementation, if in S310 the control device determines a serving radio frequency device for at least one terminal device to receive downlink data in multiple time units, the control device can determine, from the serving radio frequency devices of the at least one terminal device to receive the target downlink data, the serving radio frequency device for the at least one device to receive the target downlink data. Then, the control device determines indication information based on the serving radio frequency device of the at least one terminal device to receive the target downlink data. For example, in S310, if the control device determines a serving radio frequency device for a terminal device to receive downlink data in TTI#1 to TTI#3, the control device first determines a serving radio frequency device for a terminal device to receive downlink data in the current TTI (e.g., TTI#2), and then determines indication information based on the serving radio frequency device of the terminal device to receive downlink data in the current TTI.

[0151] The embodiments of this application do not limit the manner in which the indication information indicates the radio frequency device used to transmit target downlink data.

[0152] For example, the indication information includes an identifier of the radio frequency (RF) device used to transmit the target downlink data. Accordingly, the extension device can identify the RF device used to transmit the target downlink data based on the identifier included in the indication information. The identifier of the RF device is used to identify the RF device. For example, the identifier of the RF device includes one or more of the following: the electronic serial number (ESN) of the RF device, the cabinet number of the cabinet in which the RF device is located, the frame number of the box in which the RF device is located, and the slot number of the slot in which the RF device is located.

[0153] For example, the indication information includes an identifier of a radio frequency (RF) device that is not used to transmit the target downlink data. Accordingly, the extension device can exclude RF devices not used to transmit the target downlink data from the connected RF devices based on the identifier included in the indication information, leaving the remaining RF devices as those used to transmit the target downlink data. For instance, if the RF devices connected to the extension device include pRRU#1 to pRRU#4, and the indication information includes the identifiers of pRRU#3 and pRRU#4, then the extension device can determine that pRRU#3 and pRRU#4 are not used to transmit the target downlink data based on the identifiers included in the indication information, and thus determine that pRRU#1 and pRRU#2 are used to transmit the target downlink data.

[0154] For example, the indication information includes N bits, where N is equal to the number of radio frequency (RF) devices connected to the extension device. Each of the N bits corresponds to one RF device connected to the extension device. For example, if the extension device connects to 4 RF devices, the indication information includes 4 bits, with each of the 4 bits corresponding to one of the 4 RF devices. Each of the N bits in the indication information is used to indicate whether the RF device corresponding to that bit is used to transmit the target downlink data. For example, if the value of the nth bit is "1", then the nth bit is used to indicate that the RF device corresponding to the nth bit is used to transmit the target downlink data; if the value of the nth bit is "0", then the nth bit is used to indicate that the RF device corresponding to the nth bit is not used to transmit the target downlink data. Alternatively, if the value of the nth bit is "0", then the nth bit is used to indicate that the RF device corresponding to the nth bit is used to transmit the target downlink data; if the value of the nth bit is "1", then the nth bit is used to indicate that the RF device corresponding to the nth bit is not used to transmit the target downlink data. The nth bit can be any one of the N bits.

[0155] It should be noted that although the target downlink data is downlink data transmitted within the target time unit, the embodiments of this application do not limit whether the indication information is also used to indicate the target time unit for transmitting the target downlink data.

[0156] For example, the indication information is not used to indicate the target time unit. For instance, the extending device may default to the time unit in which it receives the indication information, or in other words, the extending device may default to the target downlink data being transmitted within the time unit in which it receives the indication information. For example, if the time unit is a TTI, and the extending device receives the indication information in TTI#1, then the extending device can determine that the target time unit is TTI#1, or in other words, the extending device can determine that the target downlink data is transmitted in TTI#1. As another example, the extending device may default to the time unit after the time unit in which it receives the indication information, or in other words, the extending device may default to the target downlink data being transmitted in the time unit after the time unit in which it receives the indication information. For example, if the time unit is a time slot, and the extending device receives the indication information in time slot #1, then the extending device can determine that the target time unit is time slot #2 after time slot #1, or in other words, the extending device can determine that the target downlink data is transmitted in time slot #2 after time slot #1.

[0157] For example, the indication information is used to indicate a target time unit. For instance, if the time unit is a subframe, the indication information is also used to indicate the subframe number of the target subframe. It can be understood that when the indication information is used to indicate a target time unit, the indication information is used to indicate the radio frequency device used to transmit target downlink data within the target time unit.

[0158] Optionally, if in S310 the control device determines a serving radio frequency device for at least one terminal device to receive downlink data within a plurality of time units, the indication information can be used to indicate at least one radio frequency device for transmitting downlink data within the plurality of time units.

[0159] It is understood that since the downlink data transmitted by the control device in multiple time units needs to be forwarded to the terminal device by the radio frequency device, the at least one radio frequency device indicated by the indication information is the serving radio frequency device of at least one terminal device used to receive downlink data in multiple time units. For example, in S310, the control device determines that the terminal devices used to receive 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, then the at least one radio frequency device indicated by the indication information includes pRRU#2 and / or pRRU#4.

[0160] For example, the indication information indicates at least one radio frequency device used to transmit downlink data in each of a plurality of time units. That is, the radio frequency device used to transmit downlink data in each of the plurality of time units is the same. For example, the indication information indicates at least one radio frequency device that serves the most terminal devices among the serving radio frequency devices of at least one terminal device used to receive downlink data in the plurality of time units. For example, the indication information indicates at least one radio frequency device that is pRRU#4 as described above. As another example, the indication information indicates at least one radio frequency device that includes serving radio frequency devices for all terminal devices used to receive downlink data in the plurality of time units. For example, the indication information indicates at least one radio frequency device that includes pRRU#2 and pRRU#4 as described above.

[0161] For example, the indication information can be used to indicate the radio frequency (RF) device used for transmitting downlink data in each of the multiple time units. The RF device used for transmitting downlink data in the first time unit is the serving RF device of the terminal device used to receive downlink data in the first time unit, and the first time unit is any one of the multiple time units. It is understood that if the terminal devices receiving downlink data in different time units are different, the RF devices indicated by the indication information for transmitting downlink data in different time units may also be different. For example, if the terminal device receiving downlink data in TTI#1 is UE#1, the terminal devices receiving downlink data in TTI#2 are UE#1 and UE#2, and the terminal device receiving downlink data in TTI#3 is UE#3, then the indication information indicates that the RF device used for transmitting downlink data in TTI#1 is pRRU#2, the RF devices used for transmitting downlink data in TTI#2 are pRRU#2 and pRRU#4, and the RF device used for transmitting downlink data in TTI#3 is pRRU#4.

[0162] The embodiments of this application do not limit the manner in which the indication information indicates at least one radio frequency device for transmitting downlink data within multiple time units.

[0163] For example, the indication information includes a correspondence between time units and the identifiers of radio frequency (RF) devices used for transmitting downlink data. Accordingly, the extension device can determine the RF device used for transmitting downlink data in each of the multiple time units based on the correspondence between the time units and the RF device identifiers. For example, the indication information is shown in Table 1 or Table 2.

[0164] Table 1

[0165] Time unit Identification of radio frequency equipment used for transmitting downlink data TTI#1 to TTI#3 The identifiers for pRRU#2 and pRRU#4

[0166] Table 2

[0167] Time unit Identification of radio frequency equipment used for transmitting downlink data TTI#1 pRRU#2 identifier TTI#2 The identifiers for pRRU#2 and pRRU#4 TTI#3 pRRU#4 identifier

[0168] For example, the indication information includes a correspondence between time units and identifiers of radio frequency (RF) devices not used for transmitting downlink data. Accordingly, based on the correspondence between time units and RF device identifiers, the extension device can determine the RF devices not used for transmitting downlink data in each of the multiple time units, and thus determine the RF devices used for transmitting downlink data. For example, the indication information is shown in Table 3 or Table 4, assuming that the RF devices connected to the extension device include pRRU#1 to pRRU#4.

[0169] Table 3

[0170] Time unit Identification of radio frequency devices not used for transmitting downlink data TTI#1 to TTI#3 The identifiers for pRRU#1 and pRRU#3

[0171] Table 4

[0172] Time unit Identification of radio frequency devices not used for transmitting downlink data TTI#1 The identifiers for pRRU#1, pRRU#3, and pRRU#4 TTI#2 The identifiers for pRRU#1 and pRRU#3 TTI#3 The identifiers for pRRU#1, pRRU#2, and pRRU#3.

[0173] For example, the indication information includes a correspondence between time units and N bits. Accordingly, the extension device can determine the radio frequency (RF) device used for transmitting downlink data in each 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, assuming that the RF devices connected to the extension device include pRRU#1 to pRRU#4, where "1" indicates that it is used for transmitting downlink data and "0" indicates that it is not used for transmitting downlink data.

[0174] Table 5

[0175] Time unit N bits TTI#1 to TTI#3 0101

[0176] Table 6

[0177] Time unit N bits TTI#1 0100 TTI#2 0101 TTI#3 0001

[0178] In step S330, the control device sends the target downlink data to the extension device. Correspondingly, in step S330, the extension device receives the target downlink data from the control device.

[0179] S340, the extended device sends the target downlink data to the radio frequency device used to transmit the target downlink data according to the instruction information.

[0180] Among them, the target downlink data is the downlink data transmitted within the target time unit.

[0181] If, in S320, the indication information received by the extended device is only used to indicate the radio frequency device used to transmit the target downlink data, then after receiving the target downlink data, the extended device directly sends the target downlink data to the radio frequency device indicated by the indication information. For example, if the indication information received by the extended device only indicates that the radio frequency device used to transmit the target downlink data includes pRRU#2, then after receiving the target downlink data sent by the control device in TTI#1, the extended device directly sends the target downlink data received from the control device to pRRU#2.

[0182] If, in S320, the indication information received by the extended device is used to indicate at least one radio frequency (RF) device for transmitting downlink data within multiple time units, and the at least one RF device is used to transmit downlink data in each of the multiple time units, then after receiving the target downlink data, the extended device directly sends the target downlink data to the RF device indicated by the indication information. For example, the indication information received by the extended device indicates that the RF devices used for transmitting downlink data in TTI#1 to TTI#3 include pRRU#2 and pRRU#4. If, in S330, the extended device receives downlink data sent by the control device in TTI#1, then the extended device directly sends the downlink data received from the control device to pRRU#2 and pRRU#4. Alternatively, if, in S330, the extended device receives downlink data sent by the control device in TTI#2, then it directly sends the downlink data received from the control device to pRRU#2 and pRRU#4. Alternatively, if in S330, the extended device receives downlink data sent by the control device in TTI#3, it directly sends the downlink data received from the control device to pRRU#2 and pRRU#4.

[0183] If, in S320, the indication information received by the extended device is used to indicate the radio frequency (RF) devices used for transmitting downlink data in each of the multiple time units, then after receiving the target downlink data, the extended device first determines the RF device used for transmitting the target downlink data in the target time unit according to the indication information, and then sends the target downlink data to the RF device used for transmitting the target downlink data in the target time unit. For example, the indication information received by the extended device indicates that the RF devices used for transmitting downlink data in TTI#1 include pRRU#2, the RF devices used for transmitting downlink data in TTI#2 include pRRU#2 and pRRU#4, and the RF device used for transmitting downlink data in TTI#3 includes pRRU#4. If, in S330, the extended device receives downlink data sent by the control device in TTI#1, then the extended device first determines that pRRU#2 is used for transmitting downlink data in TTI#1 according to the indication information, and then the extended device sends the downlink data received from the control device to pRRU#2. Alternatively, if in S330 the extension device receives downlink data sent by the control device in TTI#2, the extension device first determines, based on the indication information, that pRRU#2 and pRRU#4 are used for transmitting downlink data in TTI#2, and then the extension device sends the downlink data received from the control device to pRRU#2 and pRRU#4. Alternatively, if in S330 the extension device receives downlink data sent by the control device in TTI#3, the extension device first determines, based on the indication information, that pRRU#4 is used for transmitting downlink data in TTI#3, and then the extension device sends the downlink data received from the control device to pRRU#4.

[0184] Accordingly, after receiving the target downlink data from the extension device, the radio frequency device used to transmit the target downlink data sends the target downlink data to the terminal devices within the coverage area.

[0185] It should be noted that in S340, the extended device does not send the target downlink data to radio frequency devices that are not used to transmit the target downlink data.

[0186] In this embodiment, the control device determines the serving radio frequency (RF) device of at least one terminal device for receiving target downlink data by polling uplink or downlink signals, and sends indication information to the extension device to instruct the extension device to send the target downlink data to the RF device for transmitting the target downlink data, thereby ensuring that only the RF device for receiving the target downlink data can receive it. It is understood that since the RF device not used for transmitting the target downlink data is not the serving RF device of the terminal device for receiving the target downlink data, the terminal device for receiving the target downlink data cannot receive the target downlink data from the RF device not used for transmitting the target downlink data. Therefore, in the case where the RF device not used for transmitting the target downlink data cannot receive the target downlink data, invalid transmission can be avoided, and downlink power consumption can be reduced. If the RF device not used for transmitting the target downlink data is adjacent to other cells, interference to neighboring cells can also be avoided.

[0187] Figure 4 A schematic flowchart of a downlink transmission method provided in another embodiment of this application is shown, such as... Figure 4 As shown, method 400 may include steps S410 to S460, each of which is described in detail below.

[0188] S410, the control device determines a serving radio frequency device for at least one terminal device to receive downlink data.

[0189] Specifically, S410 is the same as S310 in method 300, and for the sake of brevity, it will not be described in detail in the embodiments of this application.

[0190] In S420, the control device sends instruction information to the extension device. Accordingly, in S420, the extension device receives the instruction information from the control device.

[0191] Specifically, S420 is the same as S320 in method 300. For the sake of brevity, the embodiments of this application will not be described in detail.

[0192] In S430, the extended device sends a command to the radio frequency device. Correspondingly, in S430, the radio frequency device receives the command from the control device.

[0193] The instruction is used to indicate whether to send the target downlink data. For a description of the target downlink data, please refer to section S310 above.

[0194] In one possible implementation, the extending device sends an instruction to the radio frequency device, including: the extending device sending a first instruction to the radio frequency device for transmitting target downlink data, the first instruction being used to instruct the transmission of target downlink data.

[0195] For example, if in S420 the indication information received by the extended device is used to indicate a radio frequency device for transmitting target downlink data, the extended device can send a first instruction to the radio frequency device indicated by the indication information. For instance, if the indication information received by the extended device indicates that the radio frequency device for transmitting target downlink data includes pRRU#2, then the extended device sends a first instruction to pRRU#2.

[0196] For example, if in S420, the indication information received by the extending device is used to indicate at least one radio frequency (RF) device for transmitting downlink data within a plurality of time units, and the at least one RF device is used to transmit downlink data in each of the plurality of time units, then the extending device can send a first instruction to the RF device indicated by the indication information. For example, if the indication information received by the extending device is used to indicate that the RF devices for transmitting downlink data within TTI#1 to TTI#3 include pRRU#2 and pRRU#4, then the extending device sends a first instruction to pRRU#2 and pRRU#4. For example, in TTI#1, the first instruction sent by the extending device to pRRU#2 and pRRU#4 is used to indicate the transmission of downlink data transmitted in TTI#1. For example, in TTI#2, the first instruction sent by the extending device to pRRU#2 and pRRU#4 is used to indicate the transmission of downlink data transmitted in TTI#2. For example, in TTI#3, the first instruction sent by the extending device to pRRU#2 and pRRU#4 is used to indicate the transmission of downlink data transmitted in TTI#3. For example, the first instruction sent by the extended device to pRRU#2 and pRRU#4 is used to instruct the transmission of downlink data transmitted in TTI#1 to TTI#3.

[0197] For another example, if in S420, the indication information received by the extended device is used to indicate the radio frequency (RF) devices used for transmitting downlink data in each of the multiple time units, the extended device first determines the RF device used for transmitting target downlink data in the target time unit according to the indication information, and then sends a first instruction to the RF device used for transmitting target downlink data in the target time unit. For example, the indication information received by the extended device indicates that the RF devices used for transmitting downlink data in TTI#1 include pRRU#2, the RF devices used for transmitting downlink data in TTI#2 include pRRU#2 and pRRU#4, and the RF device used for transmitting downlink data in TTI#3 includes pRRU#4. In TTI#1, the extended device first determines that pRRU#2 is used for transmitting downlink data in TTI#1 according to the indication information, and then the extended device sends a first instruction to pRRU#2. Alternatively, in TTI#2, the extended device first determines that pRRU#2 and pRRU#4 are used for transmitting downlink data in TTI#2 according to the indication information, and then the extended device sends a first instruction to pRRU#2 and pRRU#4. Alternatively, in TTI#3, the extended device first determines, based on the instruction information, that pRRU#4 is used for transmitting downlink data in TTI#3, and then the extended device sends the first instruction to pRRU#4.

[0198] The embodiments of this application do not limit the first instruction. Exemplarily, the extension device can generate the first instruction based on indication information. For example, the first instruction can be a single bit of information. Again, exemplarily, the first instruction is indication information. That is, the extension device sends the received indication information to the radio frequency device used to transmit target downlink data.

[0199] It should be noted that although the first instruction is used to instruct the transmission of target downlink data, the embodiments of this application do not limit whether the first instruction is also used to instruct the target time unit for transmitting the target downlink data.

[0200] For example, the first instruction is not used to indicate a target time unit. For instance, the radio frequency (RF) device may default to the time unit in which the extended device receives the first instruction, or the RF device may default to the target downlink data being transmitted within the time unit in which the RF device receives the first instruction. For example, if the time unit is a time interval (TTI), and the RF device receives the first instruction in TTI#1, then the RF device can determine that the target time unit is TTI#1, or the RF device can determine that the target downlink data indicated by the first instruction is transmitted in TTI#1. Alternatively, the RF device may default to the time unit after the time unit in which the RF device receives the first instruction, or, for example, the RF device may default to the target downlink data being transmitted within the time unit after the time unit in which the RF device receives the first instruction. For example, if the time unit is a time slot, and the RF device receives the first instruction in time slot #1, then the RF device can determine that the target time unit is time slot #2 after time slot #1, or the RF device can determine that the target downlink data indicated by the first instruction is transmitted in time slot #2 after time slot #1.

[0201] For example, the first instruction is used to indicate the target time unit. For instance, if the time unit is a time slot, the first instruction is also used to indicate the time slot number of the target time slot.

[0202] In another possible implementation, the extending device sends an instruction to the radio frequency device, including: the extending device sending a second instruction to the radio frequency device that is not used to transmit the target downlink data, the second instruction being used to indicate that the target downlink data is not transmitted.

[0203] For example, if in S420 the indication information received by the extension device is used to indicate a radio frequency device for transmitting target downlink data, the extension device can send a second instruction to a radio frequency device not indicated by the indication information. For instance, if the radio frequency devices connected to the extension device include pRRU#1 to pRRU#4, and the indication information received by the extension device indicates that the radio frequency device for transmitting target downlink data includes pRRU#2, then the extension device sends a second instruction to pRRU#1, pRRU#3, and pRRU#4.

[0204] For example, if in S420, the indication information received by the extending device is used to indicate at least one radio frequency (RF) device for transmitting downlink data within a plurality of time units, and the at least one RF device is used to transmit downlink data in each of the plurality of time units, then the extending device can send a second instruction to the RF device not indicated by the indication information. For example, if the RF devices connected to the extending device include pRRU#1 to pRRU#4, and the indication information received by the extending device is used to indicate that the RF devices for transmitting downlink data within TTI#1 to TTI#3 include pRRU#2 and pRRU#4, then the extending device sends a second instruction to pRRU#1 and pRRU#3. For example, in TTI#1, the second instruction sent by the extending device to pRRU#1 and pRRU#3 is used to indicate that downlink data transmitted in TTI#1 should not be transmitted. For another example, in TTI#2, the second instruction sent by the extending device to pRRU#1 and pRRU#3 is used to indicate that downlink data transmitted in TTI#2 should not be transmitted. For example, in TTI#3, the second instruction sent by the extension device to pRRU#1 and pRRU#3 is used to instruct that downlink data transmitted in TTI#3 should not be transmitted. For example, the second instruction sent by the extension device to pRRU#1 and pRRU#3 is used to instruct that downlink data transmitted from TTI#1 to TTI#3 should not be transmitted.

[0205] For another example, if in S420, the indication information received by the extended device is used to indicate the radio frequency (RF) devices used for transmitting downlink data in each of the multiple time units, the extended device first determines, based on the indication information, the RF devices not used for transmitting target downlink data in the target time unit, and then sends a second instruction to the RF devices not used for transmitting target downlink data in the target time unit. For instance, the indication information received by the extended device indicates that the RF devices used for transmitting downlink data in TTI#1 include pRRU#2, the RF devices used for transmitting downlink data in TTI#2 include pRRU#2 and pRRU#4, and the RF device used for transmitting downlink data in TTI#3 includes pRRU#4. In TTI#1, the extended device first determines, based on the indication information, that pRRU#1, pRRU#3, and pRRU#4 are not used for transmitting downlink data in TTI#1, and then the extended device sends a second instruction to pRRU#1, pRRU#3, and pRRU#4. Alternatively, in TTI#2, the extending device first determines, based on the indication information, that pRRU#1 and pRRU#3 are not used for downlink data transmission in TTI#2, and then the extending device sends a second instruction to pRRU#1 and pRRU#3. Alternatively, in TTI#3, the extending device first determines, based on the indication information, that pRRU#1 to pRRU#3 are not used for downlink data transmission in TTI#3, and then the extending device sends a second instruction to pRRU#1 to pRRU#3.

[0206] This application does not limit the second instruction in its embodiments. Exemplarily, the extension device can generate a second instruction based on indication information. For example, the second instruction can be a single bit of information. Another example is that the second instruction is indication information. That is, the extension device sends the received indication information to a radio frequency device that is not used to transmit target downlink data.

[0207] It should be noted that although the second instruction is used to indicate that the target downlink data is not sent, the embodiments of this application do not limit whether the second instruction is also used to indicate the target time unit for transmitting the target downlink data.

[0208] For example, the second instruction is not used to indicate a target time unit. For instance, the radio frequency (RF) device may default to the time unit in which the extension device receives the second instruction, or the RF device may default to the target downlink data being downlink data transmitted within the time unit in which the RF device receives the second instruction. As another example, the RF device may default to the time unit after the time unit in which the RF device receives the second instruction, or the RF device may default to the target downlink data being downlink data transmitted within the time unit in which the RF device receives the second instruction.

[0209] For example, the second instruction is used to indicate the target time unit. For instance, if the time unit is a time slot, the second instruction is also used to indicate the time slot number of the target time slot.

[0210] In another possible implementation, the extension device sends instructions to the radio frequency device, including: the extension device sending a first instruction to the radio frequency device used for transmitting target downlink data, and sending a second instruction to the radio frequency device not used for transmitting target downlink data.

[0211] When the extending device sends both a first command and a second command, and both commands are indication information, the extending device can transmit the indication information via broadcast. It can be understood that when the extending device transmits indication information via broadcast, all connected radio frequency devices can receive the indication information from the extending device. It can also be understood that when the extending device transmits indication information via broadcast, it may not parse the indication information but instead directly transmit the received indication information to the connected radio frequency devices.

[0212] Optionally, if in S420 the indication information received by the extended device is used to indicate the radio frequency device for transmitting downlink data in each of the multiple time units, then in S430 the instruction sent by the extended device to the radio frequency device can be used to indicate whether downlink data is transmitted in each of the multiple time units. For example, if the indication information received by the extended device is used to indicate that the radio frequency device used for transmitting downlink data in TTI#1 includes pRRU#2, the radio frequency device used for transmitting downlink data in TTI#2 includes pRRU#2 and pRRU#4, and the radio frequency device used for transmitting downlink data in TTI#3 includes pRRU#4, then in S430, the instruction sent by the extended device to pRRU#1 is used to indicate not to transmit downlink data transmitted in TTI#1 to TTI#3, the instruction sent by the extended device to pRRU#2 is used to indicate to transmit downlink data transmitted in TTI#1 and TTI#2, and to indicate not to transmit downlink data transmitted in TTI#3, the instruction sent by the extended device to pRRU#3 is used to indicate not to transmit downlink data transmitted in TTI#1 to TTI#3, and the instruction sent by the extended device to pRRU#4 is used to indicate to transmit downlink data transmitted in TTI#2 and TTI#3, and to indicate not to transmit downlink data transmitted in TTI#1.

[0213] The instructions sent by the extension device to each radio frequency device can be instructions generated by the extension device based on the indication information, or the instructions sent by the extension device to each radio frequency device can be indication information. This application embodiment does not limit this.

[0214] In step S440, the control device sends the target downlink data to the extension device. Correspondingly, in step S440, the extension device receives the target downlink data from the control device.

[0215] In S450, the extended device sends the target downlink data to the radio frequency device. Correspondingly, in S450, the radio frequency device receives the target downlink data from the extended device.

[0216] It should be noted that in S450, the control device sends the target downlink data to all connected radio frequency devices. That is, the control device sends the target downlink data to both radio frequency devices used for transmitting the target downlink data and radio frequency devices not used for transmitting the target downlink data.

[0217] Optionally, if the extension device parses the indication information received from the control device and determines the radio frequency device used to transmit the target downlink data based on the indication information, then in S450, the extension device may send the target downlink data only to the radio frequency device used to transmit the target downlink data.

[0218] In S460, the radio frequency device determines whether to send target downlink data based on the instruction.

[0219] After receiving the target downlink data from the extension device, the radio frequency (RF) device determines whether to transmit the target downlink data based on the instruction. If the RF device determines to transmit the target downlink data based on the instruction, then the RF device transmits the target downlink data. If the RF device determines not to transmit the target downlink data based on the instruction, then the RF device does not transmit the target downlink data.

[0220] In one possible implementation, if in S430 the extended device only sends the first instruction to the radio frequency device used for transmitting the target downlink data, then in S460 the radio frequency device determines whether to transmit the target downlink data based on whether it has received the first instruction. If the radio frequency device receives the first instruction, it determines to transmit the target downlink data. If the radio frequency device does not receive the first instruction, it determines not to transmit the target downlink data.

[0221] In another possible implementation, if in S430 the extended device only sends the second instruction to the radio frequency device that is not used to transmit the target downlink data, then in S460 the radio frequency device determines whether to transmit the target downlink data based on whether it has received the second instruction. If the radio frequency device receives the second instruction, it determines not to transmit the target downlink data. If the radio frequency device does not receive the second instruction, it determines to transmit the target downlink data.

[0222] In another possible implementation, if in S430 the extended device sends both a first instruction to the radio frequency device used for transmitting the target downlink data and a second instruction to the radio frequency device not used for transmitting the target downlink data, then in S460, the radio frequency device determines whether to transmit the target downlink data based on the received instructions. If the radio frequency device receives the first instruction, it determines to transmit the target downlink data. If the radio frequency device receives the second instruction, it determines not to transmit the target downlink data.

[0223] For example, if the first instruction and / or the second instruction sent by the extended device is indication information, and the indication information includes an identifier of the radio frequency device used to transmit the target downlink data, then in S460, the radio frequency device determines whether to transmit the target downlink data based on whether the indication information includes the identifier of the radio frequency device. If the indication information includes the 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 indication information does not include the 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.

[0224] For example, if the first instruction and / or the second instruction sent by the extended device is indication information, and the indication information includes an identifier of a radio frequency device not used to transmit the target downlink data, then in S460, the radio frequency device determines whether to transmit the target downlink data based on whether the indication information includes the identifier of the radio frequency device. If the indication information includes the 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. If the indication information does not include the 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.

[0225] For another example, if the first instruction and / or the second instruction sent by the extended device is an indication message, and the indication message includes N bits, then in S460, the radio frequency device determines whether to transmit the target downlink data based on the bit among the N bits corresponding to the radio frequency device. If the bit among the N bits corresponding to the radio frequency device is used to indicate the transmission of the target downlink data, it is equivalent to the radio frequency device receiving the first instruction and determining to transmit the target downlink data. If the bit among the N bits corresponding to the radio frequency device is used to indicate not to transmit the target downlink data, it is equivalent to the radio frequency device receiving the second instruction and determining not to transmit the target downlink data.

[0226] Optionally, if in S430 the instruction sent by the extended device to the radio frequency device indicates whether downlink data should be transmitted in each of the multiple time units, then in S460, the radio frequency device determines whether the target downlink data should be transmitted in the target time unit according to the instruction. If the radio frequency device determines that the target downlink data should be transmitted in the target time unit, then the radio frequency device determines to transmit the target downlink data. If the radio frequency device determines that the target downlink data should not be transmitted in the target time unit, then the radio frequency device determines not to transmit the target downlink data.

[0227] For example, the radio frequency device is pRRU#2. pRRU#2 receives instructions to instruct the transmission of downlink data in TTI#1 and TTI#2, and to instruct that it should not be used for downlink data transmission in TTI#3. In TTI#1, if pRRU#2 determines, based on the instructions, that it will be used for downlink data transmission in TTI#1, then pRRU#2 will send the downlink data transmitted in TTI#1. In TTI#2, if pRRU#2 determines, based on the instructions, that it will be used for downlink data transmission in TTI#2, then pRRU#2 will send the downlink data transmitted in TTI#2. In TTI#3, if pRRU#2 determines, based on the instructions, that it will not be used for downlink data transmission in TTI#3, then pRRU#2 will not send the downlink data transmitted in TTI#3.

[0228] In this embodiment, the control device determines the serving radio frequency (RF) device for at least one terminal device used to receive target downlink data by polling uplink or downlink signals, and sends indication information to the extension device. This allows the extension device to send a first instruction to the RF device used to transmit the target downlink data, and / or send a second instruction to the RF device not used to transmit the target downlink data, ensuring that only the RF device used to transmit the target downlink data transmits the target downlink data. It is understood that since the RF device not used to transmit the target downlink data is not the serving RF device for the terminal device used to receive the target downlink data, the terminal device used to receive the target downlink data cannot receive the target downlink data from the RF device not used to transmit the target downlink data. Therefore, in the case where the RF device not used 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 RF device not used to transmit the target downlink data is adjacent to other cells, interference to neighboring cells can also be avoided.

[0229] This application also provides an uplink transmission method, which is described below in conjunction with... Figure 5 and Figure 6 This application describes the uplink transmission method provided in its embodiments.

[0230] Figure 5 A schematic flowchart of the uplink transmission method provided in this application is shown, such as... Figure 5 As shown, method 500 may include steps S510 to S540, each of which is described in detail below.

[0231] S510, the control device determines the serving radio frequency device of at least one terminal device that will perform uplink transmission.

[0232] 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.

[0233] For a description of the service radio frequency equipment for the terminal equipment, please refer to S310 above.

[0234] For example, the control device determines the serving radio frequency device of at least one terminal device that performs the target uplink transmission. The target uplink transmission is an uplink transmission performed within a target time unit. In other words, the terminal device performing the target uplink transmission is a terminal device that performs uplink transmission within the target time unit. A description of the time unit and the target time unit can be found in S310 above.

[0235] As another example, the control device determines a serving radio frequency device for at least one terminal device that performs uplink transmission within a plurality of time units. The plurality of time units includes a target time unit for performing the target uplink transmission. It should be noted that the terminal device performing the uplink transmission may be different in different time units within the plurality of time units.

[0236] The method by which the control device determines the serving radio frequency device of at least one terminal device to perform uplink transmission can be referred to in S310 above.

[0237] In S520, the control device sends instruction information to the extension device. Accordingly, in S520, the extension device receives the instruction information from the control device.

[0238] For example, the expansion device can be a switch, router, or rHUB.

[0239] The indication information is used to indicate the radio frequency (RF) device performing the target uplink transmission. It can be understood that since the uplink data transmitted by at least one terminal device performing the target uplink transmission needs to be forwarded to the control device through the serving RF device of that at least one terminal device, the RF device indicating the target uplink transmission in the indication information is the serving RF device of the at least one terminal device performing the target uplink transmission. In other words, the indication information is used to indicate the serving RF device of the at least one terminal device performing the target uplink transmission.

[0240] In one possible implementation, if in S510 the control device determines the serving radio frequency device of at least one terminal device performing the 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.

[0241] In another possible implementation, if in S510 the control device determines the serving radio frequency device of at least one terminal device that performs uplink transmission in multiple time units, the control device can determine the serving radio frequency device of the at least one terminal device that performs the target uplink transmission from the serving radio frequency devices 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.

[0242] The manner in which the indication information indicates the radio frequency device for uplink transmission of the target is the same as the manner in which the indication information in S310 indicates the radio frequency device for transmitting downlink data of the target. For the sake of brevity, this embodiment will not be described in detail.

[0243] Similarly, embodiments of this application do not limit whether the indication information is also used to indicate the target time unit for performing target uplink transmission.

[0244] Optionally, if in S510 the control device determines a serving radio frequency device for at least one terminal device performing uplink transmission within multiple time units, the indication information can be used to indicate the at least one radio frequency device performing uplink transmission within the multiple time units. It is understood that since the uplink data transmitted by the terminal device within the multiple time units needs to be forwarded to the control device by the radio frequency device, the at least one radio frequency device indicated by the indication information is the serving radio frequency device for at least one terminal device performing uplink transmission within the multiple time units.

[0245] For example, the indication information indicates at least one radio frequency device for uplink transmission in each of the plurality of time units. That is, the radio frequency device for uplink transmission in each of the plurality of time units is the same.

[0246] For example, the indication information can be used to indicate the radio frequency device that performs uplink transmission in each of the plurality of time units. The radio frequency device performing uplink transmission in the first time unit of the plurality of time units is the serving radio frequency device of the terminal device performing uplink transmission in the first time unit, and the first time unit is any one of the plurality of time units.

[0247] The indication information indicates at least one radio frequency device that performs uplink transmission within multiple time units in the same manner as the indication information described in S310 that indicates at least one radio frequency device that transmits downlink data within multiple time units. For the sake of brevity, this embodiment will not be described in detail.

[0248] In S530, the extended device receives a signal from at least one radio frequency device. Accordingly, in S530, the radio frequency device sends a signal to the extended device.

[0249] It should be noted that in S530, the extension device can receive signals from at least one radio frequency device connected to it. For example, the extension device can receive signals transmitted by a radio frequency device performing a target uplink transmission, or it can receive signals transmitted by a radio frequency device not performing a target uplink transmission.

[0250] It is understandable that since the radio frequency device that does not perform the target uplink transmission is not the serving radio frequency device of the terminal device that performs the target uplink transmission, the radio frequency device that does not perform the target uplink transmission cannot receive the uplink data sent by the terminal device that performs the target uplink transmission. Therefore, the signal sent by the radio frequency device that does not perform the target uplink transmission to the extension device is the noise floor generated by the radio frequency device.

[0251] In step S540, the expansion device sends an uplink signal to the control device. Correspondingly, in step S540, the control device receives the uplink signal from the expansion device.

[0252] The uplink signal is determined based on the signal received from the radio frequency device performing the target uplink transmission. For example, the control device performs radio frequency combining on the signal received from the radio frequency device performing the target uplink transmission to obtain the uplink signal.

[0253] If, in S520, the indication information received by the extended device is only used to indicate the radio frequency device performing the target uplink transmission, or if the indication information received by the extended device is used to indicate 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 each of the multiple time units, then after receiving the signal from the at least one radio frequency device, the extended device determines the radio frequency device indicated by the indication information 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 indication information. If, in S520, the indication information received by the extended device is used to indicate the radio frequency device performing uplink transmission in each of the multiple time units, then after receiving the signal from the at least one radio frequency device, the extended device first determines the radio frequency device performing the target uplink transmission in the target time unit based on the indication information, then determines the radio frequency device performing the target uplink transmission from the at least one radio frequency device, and then determines the uplink signal based on the signal received from the radio frequency device performing the target uplink transmission.

[0254] In this embodiment, the control device determines the serving radio frequency (RF) device of at least one terminal device performing the target uplink transmission by polling uplink or downlink signals, and sends indication information to the extension device to instruct the extension device to report signals received from the RF device performing the target uplink transmission, thereby preventing the extension device from reporting signals received from RF devices not performing the target uplink transmission to the control device. It is understood that since the RF devices not performing the target uplink transmission are not serving RF devices of the terminal devices performing the target uplink transmission, they cannot receive uplink data from the terminal devices performing the target uplink transmission. Therefore, the signals sent by the RF devices not performing the target uplink transmission to the extension device are the noise floor generated by the RF devices. Therefore, by not reporting signals received from RF devices not performing the target uplink transmission, the extension device can reduce the uplink noise floor and reduce uplink power consumption.

[0255] Figure 6 A schematic flowchart of an uplink transmission method according to another embodiment of this application is shown, such as... Figure 6 As shown, method 600 may include steps S610 to S660, each of which is described in detail below.

[0256] S610, the control device determines the serving radio frequency device of at least one terminal device that will perform uplink transmission.

[0257] Specifically, S610 is the same as S510 in method 500. For the sake of brevity, the embodiments of this application will not be described in detail.

[0258] In S620, the control device sends instruction information to the extension device. Accordingly, in S620, the extension device receives the instruction information from the control device.

[0259] Specifically, S620 is the same as S520 in method 500. For the sake of brevity, the embodiments of this application will not be described in detail.

[0260] In S630, the extended device sends a command to the radio frequency device. Correspondingly, in S630, the radio frequency device receives the command from the extended device.

[0261] The command is used to indicate whether to perform a target uplink transmission.

[0262] In one possible implementation, the extending device sends instructions to the radio frequency (RF) device, including: sending a first instruction to the RF device performing the target uplink transmission, and / or sending a second instruction to the RF device not performing the target uplink transmission. The first instruction is used to instruct the performing of the target uplink transmission. The second instruction is used to instruct the not to perform the target uplink transmission.

[0263] For example, if in S620, the indication information received by the extension device is used to indicate the radio frequency device performing the target uplink transmission, or the indication information received by the extension device is used to indicate at least one radio frequency device performing uplink transmission in multiple time units, and at least one radio frequency device performs uplink transmission in each of the multiple time units, then the extension device may send a first instruction to the radio frequency device indicated by the indication information, and / or send a second instruction to the radio frequency device not indicated by the indication information.

[0264] For another example, if in S620 the indication information received by the extension device is used to indicate the radio frequency device that performs uplink transmission in each of the multiple time units, the extension device first determines the radio frequency device that performs the target uplink transmission in the target time unit according to the indication information, and then sends a first instruction to the radio frequency device that performs the target uplink transmission in the target time unit, and / or sends a second instruction to the radio frequency device that does not perform the target uplink transmission in the target time unit.

[0265] This application does not limit the first instruction in its embodiments. Exemplarily, the extending device can generate the first instruction based on indication information. For example, the first instruction can be a single bit of information. Also exemplarily, the first instruction is indication information. That is, the extending device sends the received indication information to the radio frequency device performing the target uplink transmission. Similarly, the second instruction can also be generated by the extending device or be indication information.

[0266] It should be noted that although the first instruction is used to instruct the target uplink transmission, the embodiments of this application do not limit whether the first instruction is also used to instruct the target time unit for the target uplink transmission.

[0267] For example, the first instruction is not used to indicate a target time unit. For instance, the RF device may default to the time unit when the extension device receives the first instruction, or the RF device may default to the target uplink transmission occurring within the time unit when the RF device receives the first instruction. As another example, the RF device may default to the time unit after the time unit when the RF device receives the first instruction, or the RF device may default to the target uplink transmission occurring within the time unit after the time unit when the RF device receives the first instruction.

[0268] For example, the first instruction is used to indicate the target time unit. For instance, if the time unit is a time slot, the first instruction is also used to indicate the time slot number of the target time slot.

[0269] Similarly, embodiments of this application do not limit whether the second instruction is used to indicate a target time unit.

[0270] Optionally, if in S620 the indication information received by the extended device is used to instruct the radio frequency device to perform uplink transmission in each of the multiple time units, then in S630 the instruction sent by the extended device to the radio frequency device can be used to instruct whether uplink transmission is performed in each of the multiple time units.

[0271] S640: The radio frequency device determines whether to perform target uplink transmission based on the instruction.

[0272] If the RF device has a signal to be sent to the extended device, the RF device determines whether to perform a target uplink transmission according to the instruction. If the RF device determines to perform a target uplink transmission according to the instruction, the RF device sends a signal to the extended device. If the RF device determines not to perform a target uplink transmission according to the instruction, the RF device does not send a signal to the extended device. It should be noted that the target uplink transmission is an uplink transmission performed within the target time unit. Therefore, within the target time unit, if the RF device has a signal to be sent to the extended device, the RF device determines whether to perform a target uplink transmission according to the instruction.

[0273] In one possible implementation, if in S630 the extended device only sends the first instruction to the radio frequency device used for target uplink transmission, then in S640 the radio frequency device determines whether to perform target uplink transmission based on whether it has received the first instruction. If the radio frequency device receives the first instruction, it determines to perform target uplink transmission. If the radio frequency device does not receive the first instruction, it determines not to perform target uplink transmission.

[0274] In another possible implementation, if in S630 the extended device only sends the second instruction to the radio frequency device that does not perform the target uplink transmission, then in S640 the radio frequency device determines whether to perform the target uplink transmission based on whether it has received the second instruction. If the radio frequency device receives the second instruction, it determines not to perform the target uplink transmission. If the radio frequency device does not receive the second instruction, it determines to perform the target uplink transmission.

[0275] In another possible implementation, if in S630 the extended device sends both a first instruction to the radio frequency device performing the target uplink transmission and a second instruction to the radio frequency device not performing the target uplink transmission, then in S640, the radio frequency device determines whether to perform the target uplink transmission based on the received instructions. If the radio frequency device receives the first instruction, it determines to perform the target uplink transmission. If the radio frequency device receives the second instruction, it determines not to perform the target uplink transmission.

[0276] For example, if the first instruction and / or the second instruction sent by the extended device are indication information, and the indication information includes the identifier of the radio frequency device performing the target uplink transmission, then in S640, the radio frequency device determines whether to perform the target uplink transmission based on whether the indication information includes the identifier of the radio frequency device. If the indication information includes the 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 indication information does not include the 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.

[0277] For example, if the first instruction and / or the second instruction sent by the extended device are indication information, and the indication information includes an identifier of the radio frequency device that does not perform the target uplink transmission, then in S640, the radio frequency device determines whether to perform the target uplink transmission based on whether the indication information includes the identifier of the radio frequency device. If the indication information includes the 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. If the indication information does not include the 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.

[0278] For another example, if the first instruction and / or the second instruction sent by the extended device is indication information, and the indication information includes N bits, then in S640, the radio frequency device determines whether to perform a target uplink transmission based on the bit among the N bits corresponding to the radio frequency device. If the bit among the N bits corresponding to the radio frequency device is used to indicate performing a target uplink transmission, it is equivalent to the radio frequency device receiving the first instruction and determining to perform the target uplink transmission. If the bit among the N bits corresponding to the radio frequency device is used to indicate not performing a target uplink transmission, it is equivalent to the radio frequency device receiving the second instruction and determining not to perform the target uplink transmission.

[0279] Optionally, if in S630 the instruction sent by the extended device to the radio frequency device is to indicate whether to perform uplink transmission in each of the multiple time units, then in S640, the radio frequency device determines whether to perform target uplink transmission in the target time unit according to the instruction. If the radio frequency device determines to perform target uplink transmission in the target time unit, then the radio frequency device determines to perform target uplink transmission. If the radio frequency device determines not to perform target uplink transmission in the target time unit, then the radio frequency device determines not to perform target uplink transmission.

[0280] In S650, the extended device receives a signal from at least one radio frequency device. Accordingly, in S650, the radio frequency device sends a signal to the extended device.

[0281] It should be noted that, since the extension device sends a second instruction to the radio frequency device that does not perform target uplink transmission, or does not send a first instruction to the radio frequency device that does not perform target uplink transmission, in S650, the radio frequency device that does not perform target uplink transmission will not send a signal to the extension device. That is to say, the extension device only receives signals from the radio frequency device that performs target uplink transmission.

[0282] In step S660, the expansion device sends an uplink signal to the control device. Correspondingly, in step S540, the control device receives the uplink signal from the expansion device.

[0283] The uplink signal is determined based on the signal received from the radio frequency device performing the target uplink transmission. For example, the control device performs radio frequency combining on the signal received from the radio frequency device performing the target uplink transmission to obtain the uplink signal.

[0284] It is understandable that, since the extension device only receives signals from the radio frequency device that performs the target uplink transmission, in S660, the extension device directly determines the uplink signal based on the signal received from at least one radio frequency device.

[0285] In this embodiment, the control device determines the serving radio frequency (RF) device of at least one terminal device performing target uplink transmission by polling uplink or downlink signals, and sends indication information to the extension device. This allows the extension device to send a first instruction to the RF device performing target uplink transmission and / or a second instruction to RF devices not performing target uplink transmission, ensuring that only the RF device performing target uplink transmission sends signals to the extension device. This prevents the extension device from reporting signals received from RF devices not performing target uplink transmission to the control device. It is understood that since the RF devices not performing target uplink transmission are not serving RF devices of the terminal devices performing target uplink transmission, they cannot receive uplink data from the terminal devices performing target uplink transmission. Therefore, the signals sent by the RF devices not performing target uplink transmission to the extension device are the noise floor generated by the RF devices. Thus, by not reporting signals received from RF devices not performing target uplink transmission, the extension device can reduce uplink noise floor and uplink power consumption.

[0286] The above, combined with Figures 3 to 6 The methods provided in the embodiments of this application are described in detail below. Figures 7 to 9 The apparatus provided in the embodiments of this application is described in detail. It should be understood that the description of the apparatus embodiments corresponds to the description of the method embodiments. Therefore, for content not described in detail, please refer to the method embodiments above. For the sake of brevity, it will not be repeated here.

[0287] Figure 7 This is a schematic block diagram of the device 700 provided in an embodiment of this application. As shown in the figure, the device 700 may include a transceiver unit 710 and a processing unit 720.

[0288] In one possible design, the device 700 can be an extension device in the above method embodiments, or it can be a chip used to implement the functions of the extension device in the above method embodiments.

[0289] It should be understood that the device 700 may correspond to an extended device in method 300, method 400, method 500 or method 600 according to embodiments of this application, and the device 700 may include a means for performing Figure 3 Method 300 Figure 4 Method 400 Figure 5 Method 500 or Figure 6 The method unit executed by the extended device in method 600. Furthermore, each unit in the device 700 and the other operations and / or functions described above are respectively for implementing... Figure 3 Method 300 Figure 4 Method 400 Figure 5 Method 500 or Figure 6The corresponding process of method 600 is described above. It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above method embodiments, and will not be repeated here for the sake of brevity.

[0290] In one possible design, the device 700 may be a radio frequency device as described in the above method embodiments, or it may be a chip used to implement the functions of the radio frequency device as described in the above method embodiments.

[0291] It should be understood that the device 700 may correspond to a radio frequency device in method 300, method 400, method 500 or method 600 according to embodiments of this application, and the device 700 may include tools for performing... Figure 3 Method 300 Figure 4 Method 400 Figure 5 Method 500 or Figure 6 The method unit executed by the radio frequency device in method 600. Furthermore, each unit in the device 700 and the other operations and / or functions described above are respectively for implementing... Figure 3 Method 300 Figure 4 Method 400 Figure 5 Method 500 or Figure 6 The corresponding process of method 600 is described above. It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above method embodiments, and will not be repeated here for the sake of brevity.

[0292] In another possible design, the device 700 may be a control device in the above method embodiment, or it may be a chip for implementing the functions of the control device in the above method embodiment.

[0293] It should be understood that the device 700 may correspond to a control device in method 300, method 400, method 500 or method 600 according to embodiments of this application, and the device 700 may include a control device for performing... Figure 3 Method 300 Figure 4 Method 400 Figure 5 Method 500 or Figure 6 The control device in method 600 is a unit that executes the method. Furthermore, each unit in the device 700 and the other operations and / or functions described above are respectively for implementing... Figure 3 Method 300 Figure 4 Method 400 Figure 5 Method 500 or Figure 6 The corresponding process of method 600 is described above. It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above method embodiments, and will not be repeated here for the sake of brevity.

[0294] It should also be understood that the transceiver unit 710 in the device 700 may correspond to Figure 8 The transceiver 820 in the device 800 shown in the figure, and the processing unit 720 in the device 700 may correspond to Figure 8 The processor 810 in the device 800 shown in the figure.

[0295] It should also be understood that when the device 700 is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit can be an input / output circuit or a communication interface; the processing unit can be a processor, microprocessor, or integrated circuit integrated on the chip.

[0296] The transceiver unit 710 is used to implement the signal transmission and reception operation of the device 700, and the processing unit 720 is used to implement the signal processing operation of the device 700.

[0297] Optionally, the device 700 further includes a storage unit 730 for storing instructions.

[0298] Figure 8 This is a schematic block diagram of the device 800 provided in an embodiment of this application. Figure 8 As shown, the device 800 includes at least one processor 810 and a transceiver 820. The processor 810 is coupled to a memory and is used to execute instructions stored in the memory to control the transceiver 820 to transmit and / or receive signals. Optionally, the device 800 also includes a memory 830 for storing instructions.

[0299] It should be understood that the processor 810 and memory 830 described above can be combined into a single processing device, with the processor 810 executing the program code stored in the memory 830 to achieve the aforementioned functions. In specific implementations, the memory 830 can be integrated into the processor 810 or independent of the processor 810.

[0300] It should also be understood that transceiver 820 may include a receiver (or receiver unit) and a transmitter (or transmitter unit). Transceiver 820 may further include an antenna, and the number of antennas may be one or more. Transceiver 820 may have a communication interface or interface circuitry.

[0301] When the device 800 is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit can be an input / output circuit or a communication interface; the processing unit can be a processor, microprocessor, or integrated circuit integrated on the chip.

[0302] Figure 9 This is a schematic diagram of a chip system according to an embodiment of this application. The chip system here can also be a system composed of circuits. Figure 9The chip system 900 shown includes: logic circuitry 910 and an input / output interface 920. The logic circuitry is coupled to the input interface to transmit data (e.g., first indication information) for execution. Figure 3 , Figure 4 , Figure 5 or Figure 6 The method described.

[0303] This application also provides a processing apparatus, including a processor and an interface. The processor can be used to execute the methods described in the above method embodiments.

[0304] It should be understood that the aforementioned processing device can be a chip. For example, the processing device can be a field-programmable gate array (FPGA), an application-specific integrated circuit (ASIC), a system-on-chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or other integrated chips.

[0305] In implementation, each step of the above method can be completed by integrated logic circuits in the processor's hardware or by instructions in software. The steps of the method disclosed in the embodiments of this application can be directly implemented by a hardware processor, or by a combination of hardware and software modules in the processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method. To avoid repetition, detailed descriptions are omitted here.

[0306] It should be noted that the processor in the embodiments of this application can be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiments can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor described above can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor, etc.

[0307] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache.

[0308] According to the method provided in the embodiments of this application, this application also provides a computer program product, which includes: computer program code, which, when run on a computer, causes the computer to execute... Figure 3 , Figure 4 , Figure 5 or Figure 6 The method of any one of the embodiments shown.

[0309] According to the method provided in the embodiments of this application, this application also provides a computer-readable medium storing program code, which, when run on a computer, causes the computer to perform... Figure 3 , Figure 4 , Figure 5 or Figure 6 The method of any one of the embodiments shown.

[0310] According to the method provided in the embodiments of this application, this application also provides a system including the aforementioned radio frequency device, extension device and control device.

[0311] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., high-density digital video disc (DVD)), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0312] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0313] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for downlink transmission, characterized in that, include: The control device sends a command, which instructs only one or a portion of the radio frequency devices to transmit a Channel State Information Reference Signal (CSI-RS) at any given time. The control device sends multiple CSI-RS at multiple times; The control device receives a beam identifier from at least one terminal device used for receiving target downlink data; The control device determines, based on the beam identifier, the serving radio frequency device of at least one terminal device for receiving the target downlink data, wherein the serving radio frequency device of the at least one terminal device for receiving the target downlink data is a radio frequency device for transmitting the CSI-RS corresponding to the beam identifier; The control device sends an instruction message to the extension device, the instruction message being used to instruct a radio frequency device for transmitting target downlink data, the radio frequency device for transmitting the target downlink data being a serving radio frequency device for at least one terminal device for receiving the target downlink data.

2. The method according to claim 1, characterized in that, The indication information is used to indicate the radio frequency device used to transmit the target downlink data within the target time unit.

3. The method according to claim 1, characterized in that, The control device determines a serving radio frequency device for at least one terminal device used to receive target downlink data, including: The control device determines a serving radio frequency device for receiving downlink data transmitted within a plurality of time units, the plurality of time units including a target time unit for transmitting the target downlink data; The indication information is used to indicate at least one radio frequency device for transmitting downlink data within the plurality of time units, wherein the at least one radio frequency device is a serving radio frequency device for at least one terminal device for receiving downlink data within the plurality of time units.

4. An apparatus, characterized in that, Includes units for implementing the method as described in any one of claims 1 to 3.

5. An apparatus, characterized in that, The device includes at least one processor coupled to at least one memory, the at least one processor being configured to execute a computer program or instructions stored in the at least one memory to cause the device to perform the method as described in any one of claims 1 to 3.

6. A system, characterized in that, Includes the apparatus as described in claim 4.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed, causes the method as described in any one of claims 1 to 3 to be performed.

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