基于最小跳数的无线传感器网络跨层设计

Wireless sensor networks cross-layer design on minimum hops

传统的严格分层参考模型无法实现对无线传感器网络资源的有效管理和运用,跨层设计是提高网络整体性能的一种有效方法。针对无线传感器网络能量、计算资源、存储资源和带宽资源有限的特点,提出一种基于最小跳数的路由层和MAC层的跨层协议设计方案。MAC层和路由层通过共享sensor节点到sink节点的最小跳数信息,在MAC层建立时间梯度,解决多个节点共享无线信道的问题;并在路由层建立路由表,解决路由选择问题。仿真结果表明,该方案在降低网络能耗的同时,在降低传输延迟,提高数据投递率方面也取得了良好的性能。

The traditional hierarchical reference model can not achieve effective management and resources use in wireless sensor networks,but cross-layer design is an effective way to improve the overall network performance.According to the resource restriction of the energy,calculation,storage and bandwidth,a cross-layer design scheme based on minimum hops which combines MAC layer with routing layer is put forward.Based on the minimum hops information sharing from sensor nodes to sink nodes,establishing time gradient MAC layer,it can solve the problem of a number of nodes shared the wireless channel;and establishing routing table in routing layer,can solve the problem of routing.The simulation results show that this scheme can decrease network overhead,and play a good performance in balancing energy,reducing transmission delay,and improving the packet delivery ratio.