Joint backoff control in time and frequency for multichannel wireless systems and its Markov model for analysis
Hyukjin Lee - School of Electrical and Electronic Engineering, The University of Adelaide, 5005, Australia (email)
Abstract: A new joint random access scheme is proposed to enable effective uplink access when users are partially aware of channel conditions in multichannel wireless systems. The proposed scheme mitigates packet collisions with joint backoff control in the time and frequency domains, cooperating with a sensing method that exploits the channel conditions. The performance analysis of the joint access scheme is facilitated by a Markov model that provides a closed-form throughput expression. Simulation results show that this channel access scheme, working together with a simple sensing method, offers significant improvements to system throughput.
Keywords: Multichannel random access, backoff access, hopping access, channel
selection, myopic sensing, optimal control, performance analysis.
Received: October 2010; Revised: March 2011; Published: August 2011.
2011 Impact Factor.921