Control and adaptation of TDMA in wireless networks

Time-division multiple-access (TDMA) is a widely used technique for simultaneous utilization of a single channel by multiple users. In its traditional form, TDMA suffers from a lack of power-efficiency, which is particularly damaging in wireless communications. This paper develops two controlled versions of TDMA, which lead to considerable power-efficiency improvements without a loss in average throughput for all users. The first one provides at least 11 dB improvement in comparison with the traditional TDMA but lacks location-fairness. The second, which is an adaptive version of the first, provides at least 5 dB improvement along with an excellent location-fairness.