Enhancement of throughput efficiency using adaptive bandwidth control for autonomous distributed networks in multiuser environments

Abstract

This paper proposes an adaptive bandwidth control scheme for autonomous distributed networks. Based on the consideration that the carrier sense multiple access with collision avoidance (CSMA/CA) is not efficient in terms of throughput due to its strict collision avoidance process, this paper employs a dynamic spectrum control (DSC) in which a certain number of discrete spectra having the highest signal to interference power ratio (SINR) is selected in a selfish manner in each link allowing a partial band interference, and such interference is suppressed by the equalizer in the receiver. For optimal selection of the band activity ratio (BAR) for the selfish DSC in the sense of throughput maximization, this paper also proposes a channel capacity maximization-based BAR control scheme. Computer simulation confirms that the proposed scheme is achieving high throughput efficiency in the autonomous distributed networks.