Lee, H.Lim, C.Choi, J.2012-05-252012-05-252011Discrete and Continuous Dynamical Systems Series B: a journal bridging mathematics and sciences, 2011; 16(4 Sp Iss):1083-10991531-34921553-524Xhttp://hdl.handle.net/2440/71182A 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.en© American Institute of Mathematical Sciences 2010.Multichannel random accessbackoff accesshopping accesschannel selectionmyopic sensingoptimal controlperformance analysisJournal article002011260710.3934/dcdsb.2011.16.10830002950323000052-s2.0-8015519850327807Lim, C. [0000-0002-2463-9760]Choi, J. [0000-0002-4895-6680]