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| 基于节点空闲度的自适应移动Ad Hoc网络路由协议 |
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郭嘉丰1,2, 张信明1,2, 谢飞1,2, 陈国良1,2
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1.中国科学技术大学,计算机科学技术系,安徽,合肥,230027;2.国家高性能计算中心,合肥,安徽,合肥,230027
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| 摘要: |
| 节点可以自由、自主地进入网络拓扑并且无须基础网络设施的特性,使得移动Ad hoc网络被广泛应用于诸如灾难救援、战场等多种环境中.传统的Ad hoc路由协议主要是基于"最短路径"来考虑,会在网络中形成局部的"热点区域,,而影响网络的性能.对此,提出了一个新的参数"节点空闲度(leisure degree)",用来体现节点当前的传输状态.基于这个参数,联合了介质访问控制(medium access control,简称MAC)层和网络层来进行跨层设计,提出了一种新的基于"节点空闲度"的自适应路由协议LDAR(leisure degree adaptive routing),采用启发式的路由选择机制,有效地实现了拥塞控制和负载分担,提高了移动Adhoc网络的性能.通过模拟实验,结果显示了LDAR协议在静态网络和动态网络的环境下,都有比DSR协议更好的性能. |
| 关键词: 跨层设计 启发式 自适应 路由协议 移动Ad Hoc网络 |
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| 基金项目:Supported by the Foundation of Science and Technology of Huawei of China under Grant No.YJCB2004036WL(华为科技基金);the Key Postdoctoral Foundation of the Ningbo City of China under Grant No.2003A61003(宁波市重点博士科学基金);the National High-Tech Research and Development Plan of China under Grant No.2002AA104560(国家高技术研究发展计划(863)) |
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| A Leisure Degree Adaptive Routing Protocol for Mobile Ad Hoc Network |
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GUO Jia-Feng,ZHANG Xin-Ming,XIE Fei,CHEN Guo-Liang
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| Abstract: |
| The characteristic that nodes can enlist into the network topology freely and independently without any fixed infrastructure makes mobile Ad Hoc networks (MANET) widely used in various environments such as disaster rescue, battlefield and so on. Traditional Ad Hoc network routing protocols are mainly based on the condition “Shortest Path”, and possibly form many local “hotspots” to influence the performance of the network. To this point, a new metric “Leisure Degree” is presented for denoting the transmission state of the node. Based on this metric, a cross-layer design method that involves the MAC (medium access control) layer and the network layer is used to present a new routing protocol Leisure Degree Adaptive Routing (LDAR), which uses a heuristic routing select mechanism to efficiently control the congestion and share the load. This method can improve the performance of the Ad Hoc networks. Simulation results show that LDAR performs much better than the DSR routing protocol under the circumstances of both static networks and mobile networks. |
| Key words: cross-layer design heuristic adaptive routing protocol mobile ad hoc network |
