Journal of Shanghai Jiaotong University ›› 2012, Vol. 46 ›› Issue (06): 870-875.

• Radiao Electronics, Telecommunication Technology • Previous Articles     Next Articles

Performance Analysis of IEEE 802.22 MAC Protocol Based on Non-contention Bandwidth Request Mechanism under Saturated Condition

 ZHANG  Yuan-Hu, HE  Chen, JIANG  Ling-Ge   

  1. (School of Electronic, Information and Electrical Engineering,
    Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2011-11-18 Online:2012-06-28 Published:2012-06-28

Abstract: In order to evaluate the performance of IEEE 802.22 MAC layer and study the influence of protocol parameters, this paper proposed an analytical model using 3-dimention discrete-time Markov chain for IEEE 802.22 MAC layer based on noncontention bandwidth request (BR) mechanism under saturated condition. This model takes both subchannel reservation mechanism and false alarm probability of spectrum sensing into consideration, analyzes service event and arrival event at the frame node and derives the state transition probability matrix accurately. After Markov chain analysis, the formulas of throughput, forced termination probability and average delay of handoff queue were derived. The numerical results show that the model can be used to evaluate the protocol performance and analyze the trade-off of performance metrics, and it can provide theoretical basis for choosing proper parameters.

Key words: IEEE 802.22, cognitive radio, saturated condition, noncontention bandwidth request mechanism, performance analysis

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