Enhanced Channel Access Estimation based Adaptive Control of Distributed Cognitive Radio Networks

• Jong-Hong Park,
• Jong-Moon Chung,

Vol. 10, No. 3, March 30, 2016
10.3837/tiis.2016.03.022, Download Paper (Free):

• cognitive radio
• Blocking probability
• Forced termination probability
• Spectrum handoff
• Spectrum sharing.

Abstract

Spectrum sharing in centrally controlled cognitive radio (CR) networks has been widely studied, however, research on channel access for distributively controlled individual cognitive users has not been fully characterized. This paper conducts an analysis of random channel access of cognitive users controlled in a distributed manner in a CR network. Based on the proposed estimation method, each cognitive user can estimate the current channel condition by using its own Markov-chain model and can compute its own blocking probability, collision probability, and forced termination probability. Using the proposed scheme, CR with distributed control (CR-DC), CR devices can make self-controlled decisions based on the status estimations to adaptively control its system parameters to communicate better.

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