分层蜂窝Ad hoc混合网络的建模与性能分析  

Modeling and Performance Analysis of Hierarchical Cellular Ad hoc Hybrid Network

作　　者：刘莉[1] 冯玉珉[1] 付立[1] 

机构地区：[1]北京交通大学电子信息工程学院,北京100044

出　　处：《铁道学报》2008年第4期108-111,共4页Journal of the China Railway Society

摘　　要：以移动设备同时支持蜂窝和基于IEEE 802.11的网络接口为前提,提出1种分层蜂窝混合网络结构(HCA),它融合了分层蜂窝结构(HCS)和移动Ad hoc网(MANET),移动用户根据情况(速度和与基站间距离等)选择直接接入分层蜂窝的下层小区(微小区)、上层小区(宏小区)或以Ad hoc模式接入上层小区。随后利用Markov模型对此混合网络性能进行分析,仿真结果显示,此网络能够提高系统容量,平衡小区业务分布,从而降低呼叫阻塞率和被迫中断率。On the basis of some mobile devices supporting both cellular structure and IEEE 802.11 based network interfaces, a Hierarchical Celluar Ad hoc Hybrid Network （HCA） is proposed, which integrates network achitectures of both the Hierarchical Celluar Structure（HCS） and Mobile Ad hoc Network （MANET）. Accord- ing to factors of mobile velocity and distance to BSs and so on, mobile users may select direct connection to the low-layer of HCS （microcells） or the high-layer of HCS （macrocells） or select connection to the high-layer of HCS in the Ad hoc mode. A Markov Modulated Poisson Process （MMPP） model is developed to analyze the performance of such hybrid networks. Simulation results show that the capacity of the network is enhanced and cellular traffic is balanced, thereby reducing the calls blocking probability and forced termination probability.

关 键 词：分层蜂窝结构 移动AD HOC网 MARKOV过程 速度阈值 

分 类 号：TN919[电子电信—通信与信息系统]