无线传感器网络中视频传输的控制仿真  

Control Simulation for Video Transmission over Wireless Sensor Network

作　　者：周芳[1,2] 蒋建国[1] 王培珍[2] 

机构地区：[1]合肥工业大学计算机与信息学院,合肥230009 [2]安徽工业大学电气信息学院,马鞍山243002

出　　处：《系统仿真学报》2010年第2期443-448,共6页Journal of System Simulation

基　　金：国家自然科学基金(50874001);国家教育部博士点基金(20060359004)

摘　　要：提出了无线传感器网络中视频传输的一种自适应联合算法:首先给出一种基于移位3维层次树集分割算法(3-DSPIHT)的自适应嵌入式多描述编码(MDC),该编码可根据网络拥塞状况而产生多个不同码流,并通过引入优先级机制,将码源分配至不同码流中,保证信号传输质量,降低网络负载。同时又提出了一种考虑能量和时延受限的多径源动态路由协议(ED-MRDSR),与MDC有机结合,提高网络吞吐量,减少能量消耗。由于该算法综合考虑了编码效率、抗误码保护及传输能量、时延受限等问题,因此,仿真实验获得了较其他方法更好的视频重构质量和更小的能量消耗。A novel united scheme for video transmission over wireless sensor network was proposed. Firstly, a flexible multiple description coding （MDC） method was put forward based on shifted 3-D SPIHT algorithm, and it could generate variable sub-streams according to the network condition; Then the priority mechanism was introduced, which could distribute the source video data to different sub-streams ,and guarantee the video quality as well as reduce the network overload; Furthermore, energy-delay aware multiple route dynamic source routing （ED-MRDSR） protocol was proposed, which could improve the quality of service and reduce the consumed energy as the same time. Since jointly considering the coding efficiency, error resilience and the limit of energy and delay, simulation results show that the novel united scheme gains better visual quality and less energy consumption compared with other methods.

关 键 词：无线传感器网络 视频流传输 多描述编码 误码保护 路由协议 

分 类 号：TN915.1[电子电信—通信与信息系统]