基于簇的认知多媒体传感器网络实时路由协议  

Cluster-based Real-time Routing Protocol for Cognitive Multimedia Sensor Networks

作　　者：李灵俐 白光伟 沈航 王天荆[1] LI Ling-li;BAI Guang-wei;SHEN Hang;WANG Tian-jing(College of Computer Science and Technology,Nanjing Tech University,Nanjing 211816,China;State Key Laboratory for Novel Software Technology(Nanjing University),Nanjing 210093,China;National Engineering Research Center for Communication and Network Technology, Nanjing University of Posts and Telecommunications,Nanjing 210003,China)

机构地区：[1]南京工业大学计算机科学与技术学院,南京211816 [2]南京大学计算机软件新技术国家重点实验室,南京210093 [3]南京邮电大学通信与网络技术国家工程研究中心,南京210003

出　　处：《计算机科学》2018年第10期83-88,共6页Computer Science

基　　金：国家自然科学基金项目(61502230;61073197;61501224);江苏省自然科学基金项目(BK20150960);江苏省普通高校自然科学研究项目(15KJB520015);南京市科技计划项目(201608009);南京大学计算机软件新技术国家重点实验室资助项目(KFKT2017B21);南京邮电大学通信与网络技术国家工程研究中心资助项目;江苏省六大高峰人才基金资助项目(第八批)资助

摘　　要：认知无线电传感器网络中信道的可变性使得多媒体数据传输面临着巨大考验,在主要用户的干扰下如何让数据实时传输到汇聚节点是许多研究者正在研究的问题。文中提出一种基于簇的认知多媒体传感器网络实时路由协议,该协议通过对主要用户活动时间的预测获得信道的预期可用时间,并选择合适的信道进行数据传输;同时考虑可靠性指标,将数据丢失概率控制在合理的范围内,使得数据可以在规定的时间内可靠地传输到目的地;在选择下一跳节点时,除了考虑距离问题,还兼顾了信道的可用时间问题,尽可能地减少数据的传输时间。仿真结果表明,CBRTR可以均衡节点能耗,延长网络的生命周期,实现数据的实时、可靠传输。Variability of channel in cognitive radio sensor network makes transmission of multimedia data more difficult.How to make data transmit to sink in real time is the problem faced by many researchers.This paper proposed a Cluster-Based Real-Time Routing(CBRTR)for cognitive multimedia sensor networks.The expected available time of channels was estimated by forecasting PU’s activity based on which the appropriate channel was chosen for data transmissions.Meanwhile,the reliability was considered to control data loss probability within reasonable extent,so that data can be transmitted reliably to sink in required time.When choosing the next hop,this paper not only considered the distance,but also added the expected available time of channels.Therefore,CBRTR reduces the amount of available time as much as possible.Simulation results show that the proposed CBRTR can balance nodes’energy,prolong network lifetime,and achieve real-time reliable transmission of data.

关 键 词：认知多媒体传感器网络 分簇 实时路由 可靠性 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]