| Ad hoc网络中动态阈值岭型函数退避算法* |
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| 引用本文： | 刘涛,刘渊b.Ad hoc网络中动态阈值岭型函数退避算法*[J].计算机应用研究,2010,27(12):4705-4707. |
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| 作者姓名： | 刘涛 刘渊b |
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| 作者单位： | 1. 江南大学信息工程学院,江苏,无锡,214122
2. 江南大学数字媒体学院,江苏,无锡,214122 |
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| 基金项目： | 国家教育部重点科学研究基金资助项目（105087）;江苏省科技支撑计划资助项目（BE2009009）；无锡市科技计划资助项目（CMEF09002） |
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| 摘 要： | 无线自组织网络(Ad hoc)在MAC层中使用IEEE 802.11 DCF的接入机制来解决节点传输竞争问题，为了解决高负载环境下的网络拥塞状况问题，在退避算法中加入了动态阈值和岭型函数来降低数据传输的冲突概率并利用NS2对改进的退避算法进行网络仿真。仿真结果表明，相对于传统的退避算法，在负载较重的网络中改进后的退避算法大概能够提高网络性能20%左右，优化后网络的时延、吞吐量和公平性均得到明显改善。
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| 关 键 词： | 无线自组织网络 动态阈值 岭型函数 退避算法 竞争窗口 |
Backoff algorithm of dynamic threshold and ridge function in Ad hoc networks |
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| LIU Tao,LIU Yuan.Backoff algorithm of dynamic threshold and ridge function in Ad hoc networks[J].Application Research of Computers,2010,27(12):4705-4707. |
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| Authors: | LIU Tao LIU Yuan |
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| Affiliation: | (a. School of Information Engineering, b. School of Digital Media, Jiangnan University, Wuxi Jiangsu 214122, China) |
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| Abstract: | MAC layer used IEEE 802.11 DCF as the access mechanism to solve the collision problems in Ad hoc networks. In order to find a good solution to congestion situation under high load network, it added the dynamic threshold and ridge function into the backoff algorithm to reduce the probability of data conflict. By using of NS2 network simulation, simulation results show that the improved backoff algorithm would improve network performance in heavy-load network, about 20%. After optimization the delay, throughput and fairness are all improved significantly in network. |
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