饱和情况下基于非竞争带宽请求机制的IEEE 802.22 MAC层协议性能分析

上海交通大学学报（自然版） ›› 2012, Vol. 46 ›› Issue (06): 870-875.

• 无线电电子学、电信技术 • 上一篇下一篇

饱和情况下基于非竞争带宽请求机制的IEEE 802.22 MAC层协议性能分析

张元虎, 何晨, 蒋铃鸽

(上海交通大学电子信息与电气工程学院，上海 200240)

收稿日期:2011-11-18 出版日期:2012-06-28 发布日期:2012-06-28
基金资助:
国家自然科学基金资助（60832009，61172067），国家科技重大专项（2010ZX0300300203，2011ZX0300300103）资助项目

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

(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

摘要/Abstract

摘要： 为了分析IEEE 802.22 MAC（Medium Access Control）协议性能以及各协议参数对性能的影响，针对饱和情况下基于非竞争BR（Bandwidth Request）机制的IEEE 802.22 MAC协议提出了一种三维离散时间马尔科夫链分析模型. 该模型同时考虑了协议的子信道预留机制和频谱感知的虚警概率，在帧节点处分析了离开事件以及到达事件，并在建模场景下准确得到了马尔科夫链的状态转移概率矩阵. 通过马尔科夫链分析，得到了吞吐量、强迫中断率和切换队列的平均排队时延3种最主要性能指标的表达式. 仿真结果表明：本文的分析模型可以准确评估协议性能，定量分析各项性能指标，为合理地选取协议参数提供理论依据.

关键词: , IEEE 802.22, 认知无线电, 饱和情况, 非竞争带宽请求机制, 性能分析

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

中图分类号:

TN 92

张元虎, 何晨, 蒋铃鸽. 饱和情况下基于非竞争带宽请求机制的IEEE 802.22 MAC层协议性能分析[J]. 上海交通大学学报（自然版）, 2012, 46(06): 870-875.

ZHANG Yuan-Hu, HE Chen, JIANG Ling-Ge. Performance Analysis of IEEE 802.22 MAC Protocol Based on Non-contention Bandwidth Request Mechanism under Saturated Condition[J]. Journal of Shanghai Jiaotong University, 2012, 46(06): 870-875.

参考文献

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饱和情况下基于非竞争带宽请求机制的IEEE 802.22 MAC层协议性能分析

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

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