摘要
传统的S-MAC(self-organizing medium access control)协议采用了协商一致的睡眠调度机制,在网络中形成虚拟簇的同时引入自适应侦听过程,但是由于增加了睡眠时间而限制了网络吞吐量,导致网络开销较大和端到端传输时延较长。为此,提出一种基于事件驱动型的跨层媒体接入控制协议(event driven cross layer-media access control,EDC-MAC)。采用跨层优化的方法,同时考虑网络层和MAC层,并且依据网络数据传输的特点将网络分为非事件状态和事件激活状态。有效地节约了能量,并减少了事件汇报时延。此外,当节点被激活处于事件激活状态时,采用分簇的方法将事件区域内的节点动态分簇,有效地减少了传输数据的能量开销。通过理论分析和仿真验证了EDC-MAC协议在相同数量感知节点情况下相对S-MAC协议能够平均减少时延35%左右,提高网络剩余能量10%左右。
Traditional S-MAC protocol adopted the consistent negotiation of sleep scheduling mechanism, forming virtual clusters in the network and introducing the adaptive listening at the same time, but it limited the network throughput due to the introduction of large sleep, leading to the network overhead and the longer end-to-end transmission delay. To solve thisproblem, a cross-layer MAC protocol based on event driven-EDC-MAC protocol was proposed. Protocol used the method of cross-layer optimization, both taking the network layer and MAC layer into account, and the network was divided into non-event status and event status relying on the characteristics of network data transmission. It could save energ}^ effectively and reduce the event reporting delay. Adopting the method of clustering , nodes in the event area clustered dynamically when a node was activated into the event status, and it would reduce the overhead of data transmission energ}^ effectively. The theo-retical analysis and simulation showed that the EDC-MAC protocol can averagely reduce the delay time nearly 35% in the case of the same number of sensing nodes and improve the network surplus energ}^ nearly 10% related to S-MAC protocol.
作者
董颖
崔梦瑶
周占颖
吴昊
吕杨
张超
DONG Ying CUI Mengyao ZHOU Zhanying WU Hao LV Yang ZHANG Chao(College of Communication Engineering, Jilin University, Changchun 130012, P. R. China)
出处
《重庆邮电大学学报（自然科学版）》
CSCD
北大核心
2017年第3期293-300,共8页
Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)
基金
国家自然科学基金(61107040)~~
