| 基于自适应能量阈值的按需节能组播路由协议 |
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| 作者姓名： | 段国建 郝洁 姚郑 张宝贤 |
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| 作者单位： | 中国科学院大学泛在与传感网研究中心, 北京 100049 |
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| 基金项目： | 国家自然科学基金（61101133，61173158）和国家科技重大专项（2010ZX03006-001-02）资助 |
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| 摘 要： | 提出一种面向无线Ad Hoc与传感器网络的基于自适应能量阈值的按需节能组播路由协议EMRP. 该协议能根据网络能量状态和节点保护比例，自适应地确定能量保护阈值. 在按需构造组播路由树的过程中，该阈值抑制网络中能量过低的节点参与组播，从而实现网络能耗均衡. EMRP同时引入目标驱动的策略，以尽量减小组播结构的规模、降低组播代价. EMRP协议执行过程中，不要求节点保存任何全局或局部网络拓扑信息，开销低，实现简单. 仿真结果表明，与已有工作相比，EMRP协议能大大降低组播路由的每分组传输能耗，显著延长网络寿命.
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| 关 键 词： | 无线Ad Hoc与传感器网络 节能组播 能量阈值 目标驱动 按需组播路由 |
| 收稿时间： | 2013-04-19 |
| 修稿时间： | 2013-04-28 |
An adaptive-energy-threshold-based energy-efficient on-demand multicast routing protocol |
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| Authors: | DUAN Guojian HAO Jie YAO Zheng ZHANG Baoxian |
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| Institution: | Research Center of Ubiquitous Sensor Networks, University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | An adaptive-energy-threshold-based energy-efficient on-demand multicast routing protocol (EMRP) for wireless Ad Hoc and sensor networks is proposed to prolong the network lifetime. Based on the network energy status, EMRP adaptively calculates an energy threshold which protects the nodes with low remaining energy by discouraging their engagement in multicast tree. Further, it adopts destination-driven strategy to efficiently reduce the multicast tree size to save the energy for a multicast task. EMRP does not require nodes to keep global or local network state information. It has low overheads and is easy to implement. Simulation results show that EMRP greatly reduces the energy cost for per-packet delivery and prolongs the network lifetime. |
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