基于区分队列服务的多媒体传感器网络QoS研究

Investigation into QoS of Multimedia Sensor Network Based on Differentiated Queuing Service

随着无线多媒体传感器网络的迅速发展,如何为其提供服务质量保证成为了热点问题.为了使实时数据能够得到优先服务,文中在无线多媒体传感器网络中引进了区分队列服务算法.首先分析了区分队列服务的原理,然后根据数据源的发送速率与带宽的关系,分3种情况讨论了实时分组生存时间、标量分组生存时间和转发节点最大队列长度之间的关系.当这一关系满足一定条件时,实时分组能够被快速及时地转发.最后通过仿真实验证明了文中方法的正确有效性.

With the rapid development of wireless multimedia sensor networks, how to guarantee QoS has become a hot research issue. In order to realize the priority service of real-time data, this paper introduces the differentiated queuing service algorithm in wireless multimedia sensor networks. First, the principle of the differentiated queuing service is analyzed. Then, according to the relationship between the transmission rate of data sources and the band- width, the relationships among the maximum queue length of nodes, the scalar packet lifetime and the real-time packet lifetime are discussed in three situations. When some conditions of this relationship are satisfied, the real- time packet can be rapidly and timely forwarded. Finally, the correctness and effectiveness of the proposed method are verified by means of simulation experiments.