Patent ID: 8121211
Filing Date: 2012-02-21
Classification: H04B,H04L

Abstract:
1. A method comprising: at a transmitting device, transmitting a transmit signal to a receiving device using a beamforming technique via multiple antennas of the transmitting device, the signal comprising data and an error detection code; determining whether the transmit signal needs to be retransmitted to the receiving device; determining whether channel conditions of a channel between the transmitting device and the receiving device indicate that the channel is at least one of a static, relatively slowly changing and relatively quickly changing channel; selecting a first retransmission scheme from a plurality of transmission schemes when the channel between the transmitting device and the receiving device is determined to be static such that beamforming weights of the beamforming technique are used for transmitting the transmit signal for the first retransmission scheme; selecting a second retransmission scheme from the plurality of retransmission schemes when the channel between the transmitting device and the receiving device is determined to be relatively slowly changing such that a cluster-based antenna selection technique is used for the second retransmission scheme; and selecting a third retransmission scheme from the plurality of retransmission schemes when the channel between the transmitting device and the received device is determined to be relatively quickly changing such that a cluster-based cyclic delay technique is used for the third retransmission scheme.