无线移动传感器网络中动态频谱分配及协同策略  

Dynamic spectrum allocation and cooperation policy for wireless mobile sensor networks

作　　者：邓曙光[1,2] 李俊超[1] 沈连丰[1] 

机构地区：[1]东南大学移动通信国家重点实验室,南京210096 [2]湖南城市学院物理与电信工程系,益阳413000

出　　处：《东南大学学报（自然科学版）》2011年第6期1119-1126,共8页Journal of Southeast University：Natural Science Edition

基　　金：国家科技重大专项资助项目(2010ZX03006-002-01);国家自然科学基金资助项目(60872004);东南大学移动通信国家重点实验室自主研究课题资助项目(2011A08);湖南省教育厅优秀青年资助项目(08B012)

摘　　要：为降低复杂性并在兼顾公平的情况下提高信道利用率和减少切换次数,在无线移动传感器网络(WMSN)中提出了一种动态频谱分配及协同策略.该策略利用空闲私有频段进行无线通信,通过有效的频谱感知与分配来协同实现网络效益最大化.簇首选择合适的感知频段避免通信碰撞,而频谱分配则结合WMSN特点建立恰当的动态频谱分配模型,并转换为不带约束的优化问题,进而提出基于粒子群优化的频谱分配算法来实现优化分配.仿真结果表明,所提出的动态频谱分配及协同策略具有系统收益高、切换次数少、收敛速度快和分配公平等特点.In order to reduce the complexity,increase spectrum utilization and decrease spectrum handoff as fairly as possible,a scheme of dynamic spectrum allocation and cooperation policy is proposed for w ireless mobile sensor netw orks（WMSN）.Maximizing the profit of netw ork is realized by effective spectrum sensing and spectrum allocation in spare spectrum.The cluster head avoids collision by selecting right spectrum bound.The appropriate dynamic spectrum allocation model is given by combining the characteristics of WMSN,and then it is converted into an unconstrained optimization problem.A spectrum allocation algorithm based on particle sw arm optimization is proposed to solve spectrum allocation problem.The simulation results show that the proposed DSA-CP（dynamic spectrum auocation and cooperation policy） scheme can increase netw ork profit and decrease spectrum handoff,and expedite convergence and allocate spectrum resource fairly in WMSN.

关 键 词：无线移动传感器网络 频谱感知 频谱分配 粒子群优化 协同策略 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]