计算机与现代化

• 网络与通信 • 上一篇    

基于NS2的无线地下网络信道模型仿真

  

  1. 天津大学计算机科学与技术学院,天津300072
  • 收稿日期:2015-08-18 出版日期:2016-01-22 发布日期:2016-01-26
  • 作者简介:李文治(1991-),男,河北沧州人,天津大学计算机科学与技术学院硕士研究生,研究方向:计算机网络; 张钢(1960-),男,天津人,教授,硕士生导师,研究方向:计算机网络; 郑莉(1989-),女,山西忻州人,硕士研究生,研究方向:计算机网络。

Simulation of Channel Model for WUSN Based on NS2

  1. School of Computer Science and Technology, Tianjin University, Tianjin 300072, China
  • Received:2015-08-18 Online:2016-01-22 Published:2016-01-26

摘要: 受限于复杂的地下通讯环境,对无线地下传感器网络的大多研究还停留在理论阶段。主流仿真平台所提供的信道模型都只适用于地上无线通信的仿真,没有合适的模型能反映电磁信号在地下环境能量严重损耗的情况。为解决以上问题,给无线地下网络研究提供仿真实验平台,本文采用双径模型为基础叠加多径瑞利衰落的信道模型,在NS2上加以实现并在实现的平台上进行仿真实验。分析吞吐率和单位有效比特能量消耗这2个性能指标在不同含水量下的变化规律。结果表明,所采用的模型能很好地反映地下通讯情况,验证了双径叠加多瑞利分布模型用于地下环境仿真的可行性,为以后的无线地下网络研究提供参考。

关键词: 无线地下传感器网络, NS2, 无线信道, 仿真

Abstract: Limited by the complex underground environment, most researches on wireless underground sensor networks (WUSN) are still in the theoretical stage. The channel model provided by the mainstream simulation platform is only suitable for the simulation above the ground. There is no suitable channel model which can reflect the serious loss of electromagnetic signal underground. To solve this problem and provide a WUSN simulation platform, a channel model considering not only the propagation of EM waves in soil, but also the reflection and multipath fading effects was adopted and implemented on NS2. Simulations were carried out on the platform, the packet throughput and energy consumption per useful bit were analyzed by simulation. The results show that the model can be used to reflect the underground communication well. This paper can be used as reference for future wireless underground network research.

Key words:  WUSN, NS2, wireless channel, simulation

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