Distributed antenna system and its data transmission method and central controller
First Claim
1. A data transmission method for a distributed antenna system comprising a central controller and a plurality of radio transceiver units, wherein, the method comprises:
- selecting, by the central controller, a set of radio transceiver units for transmission of data to a user equipment according to power information of a user equipment pilot reference signal transmitted by the radio transceiver units;
processing, by the central controller, the data according to the set of radio transceiver units; and
distributing, by the central controller, the processed data to the radio transceiver units in the set of radio transceiver units;
wherein, the processed data is downlink transmitted by the radio transceiver units in the set of radio transceiver units respectively;
wherein, processing by the central controller the data according to the set of radio transceiver units comprises;
determining, by the central controller, from the power information of the user equipment pilot reference signal transmitted from the radio transceiver units, channel status information in downlink transmission of the data from the radio transceiver units in the set of radio transceiver units; and
processing, the central controller the data according to the channel status information;
wherein, the channel status information comprises a matrix of channel impulse responses;
and wherein processing, by the central controller, the data according to the channel status information comprises;
decomposing, by the central controller, the matrix of channel impulse responses to derive vectors of beam weighting for each of the radio transceiver units in the set of radio transceiver units; and
performing, by the central controller, a beam weighting process on the data for transmission from each of the radio transceiver units in the set of radio transceiver units according to the derived vectors of beam weighting for the radio transceiver unit.
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Accused Products
Abstract
A data transmission method and central controller for a distributed antenna system and a distributed antenna system. The system includes a central controller and multiple wireless transceiver units. The method includes that wireless transceiver units measure the power of the pilot reference signals received from user terminals and forward this power rate to a central controller; the central controller selects a set of wireless transceiver units for transmitting data to the terminal according to the pilot reference signal power rates of the terminals forwarded by the multiple wireless transceiver units; the central controller performs data processing according to said set of wireless transceiver units; the central controller distributes the processed data to the wireless transceiver units in said set of wireless transceiver units, and the wireless transceiver units in said set perform the downlink data transmission.
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Citations
16 Claims
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1. A data transmission method for a distributed antenna system comprising a central controller and a plurality of radio transceiver units, wherein, the method comprises:
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selecting, by the central controller, a set of radio transceiver units for transmission of data to a user equipment according to power information of a user equipment pilot reference signal transmitted by the radio transceiver units; processing, by the central controller, the data according to the set of radio transceiver units; and distributing, by the central controller, the processed data to the radio transceiver units in the set of radio transceiver units;
wherein, the processed data is downlink transmitted by the radio transceiver units in the set of radio transceiver units respectively;wherein, processing by the central controller the data according to the set of radio transceiver units comprises; determining, by the central controller, from the power information of the user equipment pilot reference signal transmitted from the radio transceiver units, channel status information in downlink transmission of the data from the radio transceiver units in the set of radio transceiver units; and processing, the central controller the data according to the channel status information;
wherein, the channel status information comprises a matrix of channel impulse responses;and wherein processing, by the central controller, the data according to the channel status information comprises; decomposing, by the central controller, the matrix of channel impulse responses to derive vectors of beam weighting for each of the radio transceiver units in the set of radio transceiver units; and performing, by the central controller, a beam weighting process on the data for transmission from each of the radio transceiver units in the set of radio transceiver units according to the derived vectors of beam weighting for the radio transceiver unit. - View Dependent Claims (2, 3, 4, 5, 6, 10, 11, 12, 13, 14, 15, 16)
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7. A central controller for a distributed antenna system, comprising:
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a reception module, configured to receive power information of a user equipment pilot reference signal transmitted from a plurality of radio transceiver units; a selection module, configured to select a set of radio transceiver units for transmission of data to a user equipment according to the received power information of the user equipment pilot reference signal transmitted from the radio transceiver units; a data processing module, configured to process the data according to the set of radio transceiver units; and a transmission module, configured to distribute the processed data to the radio transceiver units in the set of radio transceiver units; wherein, the data processing module comprises; a determination unit, configured to determine, from the power information of the user equipment pilot reference signal transmitted from a plurality of radio transceiver units, channel status information in downlink transmission of the data from the radio transceiver units in the set of radio transceiver units; and a processing unit, configured to process the data according to the channel status information;
wherein, the channel status information comprises a matrix of channel impulse responses;and wherein the processing unit comprises; a decomposition sub-unit, configured to decompose the matrix of channel impulse responses to derive vectors of beam weighting for each of the radio transceiver units in the set of radio transceiver units; and a weighting sub-unit, configured to perforin a beam weighting process on the data for transmission from each of the radio transceiver units in the set of radio transceiver units according to the derived vectors of beam weighting for the radio transceiver unit. - View Dependent Claims (8, 9)
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Specification