| 无线Ad Hoc网络中基于跨层设计的有效用户识别方法 |
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| 作者姓名： | 田珊 张灿 |
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| 作者单位： | 1. 中国科学院研究生院信息科学与工程学院,北京 100049;
2. 信息安全国家重点实验室(中国科学院研究生院),北京 100049 |
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| 基金项目： | 国家自然科学基金(60773137, 60573112)和"863"国家科技计划(2007AA01Z297)资助 |
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| 摘 要： | 提出了一种同步DS-CDMA无线Ad Hoc网络中的有效用户识别方法,采用跨层设计,将MAC层SEEDEX协议中的调度信息用于物理层的帧编码和用户识别. 接收机首先判断是否存在有效用户,如存在则使用当前时隙所有可能发送数据的节点的扩频码来确定有效用户,不存在则直接丢弃该数据帧,从而减少了接收机的能量消耗. 仿真结果表明,该方法同现存的同类算法比较,减小了运算量,节省了接收机能量,改善了接收机错判概率.
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| 关 键 词： | Ad Hoc网络 DS-CDMA 有效用户识别 跨层 SEEDEX |
| 收稿时间： | 2009-03-10 |
| 修稿时间： | 2009-04-24 |
Virtual user identification based on cross-layer design in wireless Ad Hoc networks |
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| Authors: | TIAN Shanl ZHANG Can |
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| Institution: | 1. School of Information Science and Engineering, Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;
2. State Key Laboratory of Information Security, Graduate University of the Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | A new virtual user identification method in synchronized DS-CDMA wireless Ad Hoc networks is proposed, which uses the schedule information in SEEDEX protocol in MAC layer according to cross-layer design. The receiver detects whether there are virtual users. The virtual users will be identified by the spreading code of all the nodes which are possibly transmitting packets at the time slot if there are virtual users. Otherwise the data frame will be dropped. By using this method the calculation amount is reduced, the energy of the receiver is saved, and the error rate of the receiver is reduced. |
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| Keywords: | Ad Hoc networks DS-CDMA virtual user identification cross-layer SEEDEX |
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