多源多目标网络下基于包聚合的选择协作方法

Selection cooperation based on packet aggregation in multi-source multi-destination networks

针对实际应用中广泛存在的源-目节点不等的无线传感网,提出一种基于包聚合的选择协作方法,以提升传输可靠性。首先,通过建立源-目节点间的关联矩阵将多源多目标传感网分解为多个多源单目标传感网;其次,将包聚合策略引入协作传输中,对多源单目标网络实施基于包聚合的选择协作通信;再次,考虑传输顺序对各源节点的影响,将3种调度方法引入选择协作方法中;最后,在保证系统传输可靠性的前提下,为方便系统的多目标优化,提出了3种中继选择策略。仿真结果表明,所提选择协作方法不仅能提高系统传输可靠性且能满足不同的网络需求。

For multi-source multi-destination wireless sensor networks where the number of source nodes is not equal to the number of destination nodes, a selection cooperation based on packet aggregation is proposed to improve the transmission reliability. Firstly, multi-source multiple-destination sensor networks are decomposed into several multi-source single-destination sensor networks by establishing a correlation matrix. Secondly, the packet aggregation strategy is implemented for multi-source single-destination networks. Thirdly, considering the impact of transmission sequence on each source node, three scheduling methods are introduced into the selection cooperation. Finally, three relay selection strategies are presented to facilitate multi-objective optimization under the premise of guaranteeing system transmission reliability. Simulation results show that the proposed method can not only improve the transmission reliability of the system, but also satisfy different network requirements.