Communications system, method and device
First Claim
1. A communications method for use in a communications system comprising a transmitting device having a plurality of transmit antennas and a receiving device having a plurality of receive antennas, the method comprising determining that an error has occurred in a first data transmission attempt in which data signals are transmitted from a first selection of transmit antennas for receipt at a second selection of receive antennas, and in response to such a determination performing a second data transmission attempt in which the data signals are re-transmitted from a third selection of transmit antennas for receipt at a fourth selection of receive antennas, performing a reconfiguration operation to ensure that the channel response between the transmit and receive antennas selected for the first transmission attempt is different to the channel response between the transmit and receive antennas selected for the second transmission attempt, and further comprising recovering data at the receiving device using information from the first and second transmission attempts.
1 Assignment
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Accused Products
Abstract
A communications system (201) comprises a transmitting device (202) having a plurality of transmit antennas (206) and a receiving device (214) having a plurality of receive antennas (218). When it is determined that an error has occurred in a first data transmission attempt in which data signals (x) are transmitted from a first selection (S1) of transmit antennas (206) for receipt at a second selection (S2) of receive antennas (218), a second data transmission attempt is performed in which the data signals (x) are re-transmitted from a third selection (S3, not shown) of transmit antennas (206) for receipt at a fourth selection (S4, not shown) of receive antennas (218). Before the second transmission attempt, a reconfiguration operation is performed to ensure that the channel response (H) between the transmit and receive antennas (S1, S2) selected for the first transmission attempt is different to the channel response (H) between the transmit and receive antennas (S3, S4) selected for the second transmission attempt. Data is then recovered at the receiving device (214) using information from the first and second transmission attempts.
52 Citations
46 Claims
- 1. A communications method for use in a communications system comprising a transmitting device having a plurality of transmit antennas and a receiving device having a plurality of receive antennas, the method comprising determining that an error has occurred in a first data transmission attempt in which data signals are transmitted from a first selection of transmit antennas for receipt at a second selection of receive antennas, and in response to such a determination performing a second data transmission attempt in which the data signals are re-transmitted from a third selection of transmit antennas for receipt at a fourth selection of receive antennas, performing a reconfiguration operation to ensure that the channel response between the transmit and receive antennas selected for the first transmission attempt is different to the channel response between the transmit and receive antennas selected for the second transmission attempt, and further comprising recovering data at the receiving device using information from the first and second transmission attempts.
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34. A communications system comprising:
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a transmitting device having a plurality of transmit antennas;
a receiving device having a plurality of receive antennas;
means for determining that an error has occurred in a first data transmission attempt in which data signals are transmitted from a first selection of transmit antennas for receipt at a second selection of receive antennas;
means for performing, in response to such a determination, a second data transmission attempt in which the data signals are re-transmitted from a third selection of transmit antennas for receipt at a fourth selection of receive antennas;
means for performing a reconfiguration operation to ensure that the channel response between the transmit and receive antennas selected for the first transmission attempt is different to the channel response between the transmit and receive antennas selected for the second transmission attempt; and
means for recovering data at the receiving device using information from the first and second transmission attempts.
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- 35. A communications method for use by a transmitting device having a plurality of transmit antennas in a communications system also comprising a receiving device having a plurality of receive antennas, the method comprising determining that an error has occurred in a first data transmission attempt in which data signals are transmitted from a first selection of transmit antennas for receipt at a second selection of receive antennas, and in response to such a determination performing a second data transmission attempt in which the data signals are re-transmitted from a third selection of transmit antennas for receipt at a fourth selection of receive antennas, performing a reconfiguration operation to ensure that the channel response between the transmit and receive antennas selected for the first transmission attempt is different to the channel response between the transmit and receive antennas selected for the second transmission attempt, such that data can be recovered at the receiving device using information from the first and second transmission attempts.
- 36. A communications device having a plurality of transmit antennas for use in a communications system also comprising a receiving device having a plurality of receive antennas, the communications device further comprising means for determining that an error has occurred in a first data transmission attempt in which data signals are transmitted from a first selection of transmit antennas for receipt at a second selection of receive antennas, means for performing, in response to such a determination, a second data transmission attempt in which the data signals are re-transmitted from a third selection of transmit antennas for receipt at a fourth selection of receive antennas, means for performing a reconfiguration operation to ensure that the channel response between the transmit and receive antennas selected for the first transmission attempt is different to the channel response between the transmit and receive antennas selected for the second transmission attempt, such that data can be recovered at the receiving device using information from the first and second transmission attempts.
- 37. A communications method for use by a receiving device having a plurality of receive antennas in a communications system also comprising a transmitting device having a plurality of transmit antennas, the method comprising determining that an error has occurred in a first data transmission attempt in which data signals are transmitted from a first selection of transmit antennas for receipt at a second selection of receive antennas, and in response to such a determination performing a second data transmission attempt in which the data signals are re-transmitted from a third selection of transmit antennas for receipt at a fourth selection of receive antennas, performing a reconfiguration operation to ensure that the channel response between the transmit and receive antennas selected for the first transmission attempt is different to the channel response between the transmit and receive antennas selected for the second transmission attempt, and recovering data at the receiving device using information from the first and second transmission attempts.
- 38. A communications device having a plurality of receive antennas for use in a communications system also comprising a transmitting device having a plurality of transmit antennas, the communications device further comprising means for determining that an error has occurred in a first data transmission attempt in which data signals are transmitted from a first selection of transmit antennas for receipt at a second selection of receive antennas, means for performing, in response to such a determination, a second data transmission attempt in which the data signals are re-transmitted from a third selection of transmit antennas for receipt at a fourth selection of receive antennas, means for performing a reconfiguration operation to ensure that the channel response between the transmit and receive antennas selected for the first transmission attempt is different to the channel response between the transmit and receive antennas selected for the second transmission attempt, and means for recovering data using information from the first and second transmission attempts.
Specification