| 高静,刘旸,尹长川.认知无线Ad Hoc网络中一种基于选择区域的多跳路由协议[J].高技术通讯(中文),2013,23(2):139~145 |
| 认知无线Ad Hoc网络中一种基于选择区域的多跳路由协议 |
| A selection region based multi hop routing protocol for cognitive radio Ad Hoc networks |
| 修订日期：2012-03-26 |
| DOI： |
| 中文关键词: 认知无线Ad Hoc网络， 多跳路由， 前进密度， 选择区域， 泊松点过程 |
| 英文关键词: cognitive radio Ad Hoc networks， multi hop routing， density of progress， selection region， poisson point processes |
| 基金项目:国家自然科学基金（61271257，60972073），863计划（2011AA100706）和北京市自然科学基金（4122034）资助项目 |
| 作者 | 单位 | | 高静 | 北京邮电大学网络体系构建与融合北京市重点实验室；重庆邮电大学光电学院 | | 刘旸 | 北京邮电大学网络体系构建与融合北京市重点实验室 | | 尹长川 | 北京邮电大学网络体系构建与融合北京市重点实验室 |
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| 中文摘要: |
| 根据认知无线Ad Hoc网络中次网络多跳传输数据的特点，提出了一种基于选择区域的多跳路由协议。该协议假设主网络和次网络节点分布在同一二维平面内，且服从相互独立的泊松点过程, 传输信道包含大尺度路损和小尺度瑞利衰落；在定义的选择区域内，选取距离发射节点最近的节点作为多跳路由协议中下一跳传输的中继节点；通过约束次网络对主网络的干扰，以期望前进密度为目标函数，推导出次网络发射概率确定时的最优参考传输距离的上界，参考传输距离确定时的最优次网络发射概率，以及二者同时优化时满足的关系式。由于综合考虑了参考传输距离、发射概率和传输角度，从而确保了多跳传输的方向性和有效性。数值分析结果证明了理论分析的正确性，表明次网络的期望前进密度与主网络节点密度之间存在折衷关系 |
| 英文摘要: |
| According to the multi hop transmission characteristics of the secondary network in cognitive radio (CR) Ad Hoc networks, a selection region based multi hop routing protocol is proposed. The protocol assumes primary and secondary nodes are distributed on the same two dimensional plane, obeying the independent Poisson Point Process, and considers large scale path loss and small scale Rayleigh fading in the wireless channels. It chooses the node nearest to the transmitter from the selection region as the next hop relay node. By constraining the interference from the secondary network to the primary network and defining the expected density of progress as the objective function, it presents an upper bound of the optimum transmission distance in a given transmission probability, and derives the optimum transmission probability in a given transmission distance. It also obtains the relationship between the optimum transmission distance and the optimum transmission probability when jointly optimizing both of them. The numeric results are presented to prove the correctness of the theoretical analysis and also indicate that there is a tradeoff between the optimized expected density of progress of the secondary network and the density of primary nodes |
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