面向无线认知网络的冗余感知数据消除

发布时间：2018-03-05 07:37

本文选题：skyline查询　切入点：无线认知网络　出处：《软件学报》2014年05期 　论文类型：期刊论文

【摘要】：在无线认知网络的协作式频谱感知方案中,非授权用户(次要用户)将各自感知到的可用频谱信息转发给邻居节点,作为频谱分配的依据.而实际上,仅有部分数据影响着频谱分配的结果.无用信息的传递不仅产生了大量额外的通信开销,而且在频谱分配过程中浪费了计算资源.这种情况对于频谱资源稀缺的无线认知网络和能量有限的认知终端来说是无法接受的.因此,如何减少无用信息的传递是一个具有重大实际意义的问题.基于skyline查询处理,提出了多目标约束下skychannel查询处理方法,以减少冗余感知信息传递.其基本思想是:将数据空间划分为控制区域、被控区域和自由区域,按照信道的性能参数,将要查询的信道放入相应区域.传输时,直接忽略被控信道的信息而仅传输非被控信道的数据.在保证不影响频谱分配结果的前提下,可以大量降低网络开销,节约用户的计算资源.仿真结果显示,skychannel查询方法在节约查询时间、降低通信开销和计算开销等方面具有优势.
[Abstract]:In the cooperative spectrum sensing scheme of wireless cognitive networks, the non-authorized users (secondary users) transmit the available spectrum information they perceive to the neighbors as the basis for spectrum allocation. Only part of the data affects the result of spectrum allocation. The transmission of useless information not only results in a large amount of additional communication overhead, Moreover, computational resources are wasted in the spectrum allocation process, which is unacceptable for wireless cognitive networks with scarce spectrum resources and cognitive terminals with limited energy. How to reduce the transfer of useless information is a problem of great practical significance. Based on skyline query processing, a multi-objective constraint skychannel query processing method is proposed. The basic idea is to divide the data space into control region, controlled region and free area, according to the performance parameters of the channel, the channel to be queried into the corresponding region. The information of the controlled channel is ignored directly and only the data of the non-controlled channel is transmitted. Without affecting the result of spectrum allocation, the network overhead can be greatly reduced. Simulation results show that Skychannel query method has advantages in saving query time, reducing communication overhead and computing overhead.
【作者单位】：国防科学技术大学计算机学院;香港城市大学计算机系;
【基金】：国家重点基础研究发展计划(973)(2011CB302600) 国家自然科学基金(61070211,60903223) 国家高技术研究发展计划(863)(2011AA01A202) 教育部博士点基金(20114307120003)
【分类号】：TN925

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