基于关联移动模型的多播容量和时延分析

Multicast Capacity and Delay Analysis in Correlated Mobility Networks

互联网中一个普遍存在的现象是多个用户同时向网络请求同一个内容资源(例如同一部电影,同一个网页等),这使得多播技术受到了广泛的关注与应用。因为相比于传统单播技术,多播传输所占用的网络资源较少,通信效率较高。随着通信技术的发展和智能终端的广泛普及,移动网络流量占到了整个互联网流量的80%以上。因此探索移动网络中的多播传输性能对于多播技术在移动网络中的应用具有重要意义。文章基于关联移动模型,探索无线移动网络中多播容量和时延的量化关系,即在给定任意时延D的情况下,建立多播容量λ关于D的理论上界关系表达式≤f(D),f是关于D的函数表达式。分析结果将为实际移动网络场景下多播传输性能的分析提供一定的理论参考价值。

It is common that multiple users simultaneously request the same content(a movie or a web page)within the Internet,which makes multicast gain great popularity and be used in various fields.Compared with unicast,multicast consumes less network resources and has high communication efficiency.With the development of communication technology and the wide spread of smart terminal,the mobile internet traffic occupies nearly 80%of the whole internet traffic.Thus,it is of great importance to investigate the multicast performance in mobile networks for better deploying the multicast technology within mobile networks.In this paper,we study the quantitative relationship between multicast capacity and delay based on the correlated mobility model,i.e.,for any given delay of D,we establish the corresponding upper bound of multicast capacity,which isλ≤f(D),where f(D)is defined as the function with respect to D.Our results provide some theoretical guidelines for the performance analysis of multicast in real mobile networks.