基于跨层设计与优化的无线传感网络数据传输算法

针对无线传感网络(wireless sensor networks,WSNs)的多对一通信,提出了路由和媒体接入协议(medium access control,MAC)的跨层设计与优化的数据传输算法,记为J-R-MAC(joint routing and medium access control),进而减少传输时延。JR-MAC算法引用新的周期结构,此周期结构允许k个节点在同一个周期内安排数据包传输;并给节点提供k次机会传输数据包。同时,J-R-MAC算法将网络内所有节点划分k个不相交集;进而减少节点的空闲监听时间。此外,J-R-MAC引用特殊序列作为地址,减少控制包尺寸;进而降低能耗。仿真数据表明,与同类的协议相比,提出的J-R-MAC算法有效地降低了端到端传输时延;并提高了数据包传递率。

Cross-layer design and optimization-based on data transmission algorithm in WSNs

In a many-to-one communication paradigm for wireless sensor networks (WSNs), the joint routing and MAC Protocol is proposed in this paper, which is named as J-R-MAC. J-R-MAC uses a novel cycle structure, and it allows up to k nodes to schedule data packet transmission in the same cycle. Then it provides k chances to a node to succeed in data packet transmission scheduling in a cycle. J-R-MAC partitions the network nodes into k disjoint sets to reduce the idle listening period of a node in a cycle. J-R-MAC reduces the energy consumption in periodic broadcast of such information by making a particular sequence of information usable as the address of the node.