多媒体传感器网络中服务感知的传输控制协议  

Service-aware Transport Control Protocol in Multimedia Sensor Networks

作　　者：孙岩[1] 马华东[1] 刘亮[1] 

机构地区：[1]北京邮电大学计算机学院智能通信软件与多媒体北京重点实验室,北京100876

出　　处：《系统仿真学报》2010年第9期2141-2148,共8页Journal of System Simulation

基　　金：国家自然科学基金重点项目(60833009);北京市自然科学基金(4092030);教育部新世纪人才计划(NCET-08-0737)

摘　　要：多媒体传感器网络中同时存在端到端(end-to-end)的多媒体流和事件到汇聚点(event-to-sink)的事件流,这对多媒体传感器网络服务质量保证带来了新的挑战。针对多媒体传感器网络提出了一个基于二级反馈的QoS自适应保证方法,该方法以传输控制协议为核心,根据汇聚节点处数据包的接收率和网络拥塞状况将网络划分为10个运行状态,通过传输控制协议调整媒体流和事件流的发送率,完成网络向最优状态的迁移。一系列基于NS2的仿真试验证明了本方法的有效性。There exist two kinds of streams in multimedia sensor networks：end-to-end stream and event-to-sink stream,this makes the guarantee of QoS multimedia transmission face a new set of challenges. A self-adaptive QoS guarantee scheme was proposed based on two-layer feedback for multimedia sensor networks. The kernel of this scheme is transport control protocol. The network is partitioned into 10 typical states by means of the data packet receive rate at sink node and network congestion status,thus the state transfers to the optimal one by adjusting the transmit rate of media stream and event stream. A series of simulation results are performed by NS2 to demonstrate the effectiveness of the proposed scheme.

关 键 词：多媒体传感器网络 QOS保证 传输协议 拥塞控制 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]