TD-LTE应急通信中的改进型节点移动模型研究

Study on Improved Random Waypoint Mobility Model in Emergency Communication Based on TD-LTE

基于TD-LTE的应急通信系统能够在灾难发生后快速组网,为及时救援提供宝贵信息,而合适的节点移动模型是自组网路由算法的基础。文章通过分析应急场景中移动基站的运动特性,提出一种基于区域稳态分布的改进型随机路点移动模型。该模型能够缓解RWP模型稳态分布不均、节点速度逐渐衰减以及节点重复无效率运动的问题,有利于模拟应急通信中移动基站的运动情况以及后续Ad Hoc路由协议的仿真。

The emergency communication system based on TD-LTE is capable of fast self-networking after disaster happens, which can provide the valuable information for the timely rescue.Meanwhile, the appropriate node mobility model is the basis of the Ad Hoc routing algorithm. In this paper, an improved random waypoint mobility model based on regional steady-state distribution is proposed by analyzing the motion characteristics of the mobile station in the emergency scene. This model can ease the non steady-state distribution of RWP model, the node velocity gradually fading and nodes with non-sense movement problems.It is beneficial to simulate the true movement of mobile base station and the simulation of Hoc Ad routing protocol.