异构无线网络垂直切换判决技术分析

Analysis of vertical handoff decision technology based on heterogeneous wireless networks

异构无线网络中移动用户通过在多种接入技术不同异构网络之间漫游,核心问题是通过不同的垂直切换判决策略,选择最合适的接入网络确保多模终端在异构网络移动过程中保持连接。通过对异构网络垂直切换判决方法对比分析,其中接近理想方案的序数偏好法TOPSIS对网络更为敏感,而简单加权法SAW则相对稳定。

Mobileusers obtain the intelligent service whenever and wherever possible while the terminals are roaming everywhere in heterogeneous networks.The core problem is that the most appropriate access network is selected in order to ensure that the multi-mode terminal is connectedby the different vertical handoff decision strategy.As a result,TOPSIS is more sensitive to the network and SAW is relatively stable through the analysis of vertical handoff decision process.