计算机应用 ›› 2014, Vol. 34 ›› Issue (5): 1236-1238.DOI: 10.11772/j.issn.1001-9081.2014.05.1236

• 网络与通信 • 上一篇    下一篇

基于业务需求的速度自适应垂直切换算法

陶洋,江彦鲤,陈雷成   

  1. 重庆邮电大学 通信与信息工程学院,重庆 400065
  • 收稿日期:2013-11-07 修回日期:2013-12-26 出版日期:2014-05-01 发布日期:2014-05-30
  • 通讯作者: 江彦鲤
  • 作者简介:陶洋(1964-),男,重庆人,教授,博士,主要研究方向:通信网络、多维网络;江彦鲤(1990-),女,四川达州人,硕士研究生,主要研究方向:无线通信;陈雷成(1988-),男,山东日照人,硕士研究生,主要研究方向:通信理论、信道模拟。

Speed adaptive vertical handoff algorithm based on application requirements

TAO Yang,JIANG Yanli,CHEN Leicheng   

  1. School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
  • Received:2013-11-07 Revised:2013-12-26 Online:2014-05-01 Published:2014-05-30
  • Contact: JIANG Yanli

摘要:

下一代网络(NGN)是一种采用不同无线接入技术的融合网络,在这种融合的网络环境中,不同无线接入技术间的垂直切换成为重要的研究课题。但是现有的垂直切换算法少有考虑用户业务对网络的实际需求偏好以及用户的移动性,大多以网络端的属性值作为切换判决指标。为了解决上述问题,提出了一种基于业务需求的速度自适应垂直切换算法,并通过速度因子以及网络属性因子矩阵来补偿因节点运动而对无线链路质量造成的损耗,自适应调整业务对网络属性因子需求的权重,从而支撑节点做出有效的切换判决,最终实现速度自适应的能更好地服务于应用业务的垂直切换。仿真实验表明,该算法能有效地克服乒乓效应,且与其他切换算法相比有较高的数据包吞吐率。

Abstract:

Next Generation Network (NGN) is an integrative network which uses different radio access technologies. In this converged network environment, vertical handoff between different wireless access technologies becomes an important research topic. However, most of vertical handoff algorithms do not think about the actual demands of network and the mobility of user, but taking network properties as the standards of judgment. In order to solve the problem above, a speed adaptive vertical handoff algorithm based on application requirements was proposed, which used the speed factor and network propertise matrix to compensate for the quality loss of wireless link caused by mobility, which adaptively adjusted the weights of network properties that the application needs and supported node to make effective decisions. This algorithm realized vertical handoff with adaptive speed which better served the application and . Simulation results show that the proposed algorithm can overcome the ping-pang effect effectively and it has higher packet throughput in comparison with the other vertical handoff algorithms.

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