典型部署策略下认知无线传感网的机会频谱接入方法

doi:10.3969/j.issn.1000-436x.2014.z2.006

Abstract

Abstract:

Explored the opportunistic spectrum access method for cognitive radio sensor networks with regular topology patterns and coverage patterns.The method includes an economic spectrum-and-timeslot-allocation scheme,a sensing-results-reporting scheme and a cooperative spectrum-sensing scheme.A model was proposed for analyzing the blocking and dropping probability for secondary users,the effective reception bandwidth and transmission delay.Numerical analysis shows that Triangle yields the optimal cooperative sensing performance,and square yields the optimal reception bandwidth.In case of complete coverage,Square and triangle lead to less transmission delay,and in case of multiple coverage,square leads to the least transmission delay.The false alarm probability of single node has little impact on transmission delay,and Primary User’s activity may affect delay noticeably.On the other hand,larger ratio of transmission timeslot to sensing timeslot helps to decrease delay.

Key words: cognitive radio sensor network, topology pattern, channel allocation, cooperative sensing, network capacity

Wen-xiang LI,Ya-jie MA,Peng KE. Opportunistic spectrum access method for cognitive radio sensor network of typical deployment strategies[J]. Journal on Communications, 2014, 35(Z2): 33-41.

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References 17

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临界覆盖方式	Square	Triangle	Hexagon
临界完全覆盖	2	2.6	1.3
临界多重覆盖	1	0.866	1.3

拓扑模式	l		m		n
拓扑模式	I=r_c	I=2r_c	I=r_c	I=2r_c	n
Square	2	6	5	13	4
Triangle	3	6	7	19	6
Hexagon	2	4	4	10	3

Opportunistic spectrum access method for cognitive radio sensor network of typical deployment strategies

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