事件驱动的无线多媒体传感器网络QoS通信协议

提出一种事件驱动的无线多媒体传感网QoS感知通信(EDQC)协议。首先,当监测到事件发生时,在满足事件监测质量的基础上,启动最少的视频节点进行数据采集,以减少冗余数据的产生。其次,在数据传输阶段,计算由前进距离、队列长度和剩余能量构成的复合权值,并选择权值最大的下一跳节点进行数据转发,从而避开拥塞区域、延长网络生存周期。仿真结果表明,EDQC协议能够较好的适应视频监测需求,同时减少通信拥塞、均衡节点能耗。

Event-Driven QoS Communication Protocol in Wireless Multimedia Sensor Networks

This paper proposes an Event-Driven QoS-aware Communication (EDQC) protocol in wireless multimedia sensor networks. When an event occurs, video sensors as few as possible will be awakened under the conditions of event monitoring requirement, in the hope of reducing video data redundancy. During data transmission, a compositive weight is determined in consideration of transmission distance, queue length and residual energy, and then the data are forwarded to the sensor node with the largest compositive weight as the next hop, in order to bypass congestion region and to prolong the nerwork lifetime. Our simulation results show the proposed EDQC can support video monitoring, in the meanwhile, reduce traffic congestion and balance energy consumption.