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INFOCOM
2012
IEEE

Delay optimal multichannel opportunistic access

6 years 6 months ago
Delay optimal multichannel opportunistic access
Abstract—The problem of minimizing queueing delay of opportunistic access of multiple continuous time Markov channels is considered. A new access policy based on myopic sensing and adaptive transmission (MS-AT) is proposed. Under the framework of risk sensitive constrained Markov decision process with effective bandwidth as a measure of queueing delay, it is shown that MS-AT achieves simultaneously throughput and delay optimality. It is shown further that both the effective bandwidth and the throughput of MS-AT are two-segment piece-wise linear functions of the collision constraint (maximum allowable conditional collision probability) with the effective bandwidth and throughput coinciding in the regime of tight collision constraints. Analytical and simulation comparisons are conducted with the myopic sensing and memoryless transmission (MS-MT) policy which is throughput optimal but delay suboptimal in the regime of tight collision constraints.
Shiyao Chen, Lang Tong, Qing Zhao
Added 28 Sep 2012
Updated 28 Sep 2012
Type Journal
Year 2012
Where INFOCOM
Authors Shiyao Chen, Lang Tong, Qing Zhao
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