Patent ID: 8213950
Filing Date: 2012-07-03
Classification: H04W

Abstract:
1. A wireless base-station comprising: radio frequency (“RF”) circuitry adapted to transmit data bearing signals to each of two or more wireless mobile clients and to receive data bearing signals from each of the two or more wireless mobile clients, wherein transmitting and receiving for a given wireless client is performed at one of a set of possible channels each having a center carrier frequency; sensing circuitry adapted to sense one or more signal parameters of the received signals, which signal parameters are indicative of a direction and distance of each of the two or more of the wireless clients relative to said base-station; processing circuitry adapted to estimate, based on the sensed signal parameters, whether a given two of the two or more wireless clients are within a distance of each other in which they can detect each other's transmissions; and control logic adapted to avoid collisions by: (1) switching the two or more wireless client devices identified as communicating with said base-station from a common direction and as being within a distance of each other in which they can detect each other's transmissions, to a common channel having a common center frequency, and (2) switching the two or more wireless client devices identified as communicating with said base-station from a common direction and as being outside a distance of each other in which they can detect each other's transmissions, to different channels having different center carrier frequencies.