ENHANCING WIMAX PERFORMANCE WITH SUBSCRIBER STATIONS ACTING AS AD HOC REPEATERS

摘要

A wireless communications network includes a subscriber station acting as a relay station (or ad-hoc repeater) between another subscriber station (a child subscriber station) and a base station (BTS) when there is no LOS between the other subscriber station and the base station, but there is LOS between the other subscriber station and the relay station. The BTS divides each of the downlink (DL) and uplink (UL) sub-frames into P1 and P2 portions and schedules transmissions of child subscriber DL and UL data during P1 of the DL and UL frames (from the BTS), respectively. The relay station receives the child subscriber DL and UL data, stores the data, and transmits/forwards the child subscriber DL and UL data during P2 of the DL and UL frame (to the BTS), respectively.