Communication system for determining data transmitting scheme according to channel state
AssigneeElectronics and Telecommunications Research Institute
InventorsKyeong Pyo Kim, Seung Eun Hong, Jin Kyung Kim
Life of this patent
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Abstract
Disclosed is a data transmission method that may enhance a channel capacity in a wireless channel environment of a frequency band having a high directivity in which a transmission apparatus may form a transmission beam and transmit a training signal while sequentially changing a direction of the formed transmission beam, a reception apparatus may form a reception beam and receive the training signal while sequentially changing a direction of the formed reception beam, and the transmission apparatus may receive a response signal from the reception apparatus with respect to the training signal and determine a data transmission scheme based on the received response signal.
Claims9
A method of a transmission apparatus for transmitting data to a reception apparatus using a plurality of antennas, comprising:
- forming a beam into a predetermined direction using the plurality of antennas;
- repeatedly transmitting a training signal to the reception apparatus while sequentially changing a direction of the formed beam, each transmission being in a different direction, and receiving at least one response signal from the reception apparatus with respect to the transmitted training signals;
- determining a number of channel responses based on a magnitude and a time interval of each of the at least one response signal;
- determining presence of a multipath based on the determined number of channel responses, and a magnitude and a direction of each of the at least one response signal;
- and
- determining a data transmission scheme, which is one of
- a first transmission scheme, in which a plurality of beams are formed and different pieces of the data are transmitted by each of the formed beams, and
- a second transmission scheme, in which a plurality of beams are formed and a same piece of the data is transmitted by each of the formed beams,
- based on the determined number of channel responses and the determined presence of a multipath, for transmitting the data to the reception apparatus.
A method of a reception apparatus for receiving data, comprising:
- forming a reception beam into a predetermined direction using a plurality of receive antennas;
- receiving at least one training signal from a transmission apparatus that repeatedly transmits trainings signal to the reception apparatus while sequentially changing a direction of the formed reception beam, and transmitting at least one response signal to the transmission apparatus in response to the received at least one training signal;
- and
- receiving, from the transmission apparatus, data that is transmitted using a data transmission scheme, which is one of
- a first transmission scheme, in which a plurality of transmission beams are formed and different pieces of the data are transmitted by each of the formed transmission beams, and
- a second transmission scheme, in which a plurality of transmission beams are formed and a same piece of the data is transmitted by each of the formed transmission beams,
- determined based on the transmitted at least one response signal.
A method of transmitting data, comprising:
- forming a first transmission beam into a predetermined direction using a plurality of transmit antennas;
- repeatedly transmitting a training signal to a reception apparatus while sequentially changing a direction of the formed first transmission beam, each transmission being in a different direction;
- receiving at least one response signal from the reception apparatus with respect to the training signals;
- determining a number of channel responses using the at least one response signal;
- determining presence of a multipath using the at least one response signal;
- and
- determining a data transmission scheme, which is one of
- a first transmission scheme, in which a plurality of beams are formed and different pieces of the data are transmitted by each of the formed beams, and
- a second transmission scheme, in which a plurality of beams are formed and a same piece of the data is transmitted by each of the formed beams,
- based on the determined number of channel responses and the determined presence of a multipath;
- forming a second transmission beam based on the determined data transmission scheme;
- and
- transmitting data to the reception apparatus using the second transmission beam.
Dependencies are inferred from the claim text.