Distributed Probabilistic Scheduling in OFDMA Uplink using Subcarrier Sensing

Distributed uplink scheduling in OFDMA systems is considered. In the proposed scenario, mobile users have the responsibility of making their own transmission decisions. Users are grouped into categories according to their channel state on each subcarrier. Users from each category decide on their own transmission by waiting for a random delay then transmitting with a certain probability. The proposed algorithm is completely distributed and does not require scheduling effort from the base station. Although no centralized control is present in the proposed approach, promising results are achieved in terms of throughput and fairness.