通信工程文献翻译——摘要--下一代异构无线网络垂直切换是一个多层面的问题。在这篇文章中我们提出一个多维垂直基于自适应信噪比切换算法（MASVH）,它使用的是综合影响信噪比、用户需要的带宽、用户流量费用和利用不同接入网络进行切换的多属性判决的QoS审议。仿真结果证实，新MASVH算法在高的数据吞吐量和低丢包率方面提高了系统性能,并且降低了进入综合无线网络的用户流量成本。

索引词--异构无线网络，自适应，垂直 切换，信噪比。

一、简介

无线局域网（WLAN）和第三代（3G）移动网络，如宽带码分多址（WCDMA）使用系统可以灵活的为下一代多媒体无线网络铺平道路。垂直切换管理具有不同信道特点,网络状况以及成本的用户的不同接入网的流动性.综合下一代网络的服务质量是一个多层面的问题，这就要求明确垂直切换算法的多属性和服务，但仍然有效掌握足以维持无缝操作与合理的计算成本。

不同的QoS的考虑，垂直切换算法[1-5]利用接收信号强度（RSS）作为根本物理层切换决定指标，协助其它因素，如成本和利用。但是，对于异构无线网络垂直切换,无线局域网和WCDMA 网络的基于信噪比垂直切换（CSVH）[6]的比较已经表明，与RSS基于垂直切换比较,使用信号干扰和信噪比（SINR）为切换指标导致最终用户和系统的高吞吐量。

提供无缝的垂直切换与多属性QoS的支持，在本文中，我们提出一个MASVH算法它采用信噪比，用户需要的带宽，成本和用户流量,利用每一个无线局域网接入点（AP）和WCDMA 基站（BS）。额外的切换标准与信噪比价值在信干噪比转换不同的接入网络和最低计算成本相关。仿真结果表明，该提议MASVH在成本更低的用户流量,降低丢包率以及更高的系统吞吐量上更好。

二、多维基于自适应信噪比的垂直切换算法 

在这项研究中，我们集中将下行流量，作为它通常需要更高的带宽而不是上行，特别是在多媒体服务，如视频流媒体使用高速下行分组接入（HSDPA）通道与.......

Abstract— Vertical handoff in next generation heterogeneous wireless networks is a multi-dimensional issue. In this article we propose a Multi-dimensional Adaptive SINR based Vertical Handoff algorithm (MASVH) which uses the combined effects of SINR, user required bandwidth, user traffic cost and utilization from participating access networks to make handoff decisions for multi-attribute QoS consideration. Simulation results confirm that the new MASVH algorithm improves the system performance in terms of higher throughput and lower dropping probability, as well as reduces the user traffic cost for accessing the integrated wireless networks.

Index Terms— Heterogeneous wireless networks, adaptive, vertical handoff, SINR.

I. INTRODUCTION

THE integration of wireless local area network (WLAN) and third generation (3G) cellular networks such as wideband-CDMA (WCDMA) system can pave the way for flexible next generation multimedia wireless networks. Vertical handoff manages mobility among different access networks which could vary in channel characteristic, network condition as well as cost to users. QoS in the integrated next generation networks is a multi-dimensional issue, which requires the vertical handoff algorithm to be multi-attribute and QoS aware, but still efficient enough to maintain the seamless operation with reasonable computation cost.

For varying QoS consideration, vertical handoff algorithms [1-5] use Received Signal Strength (RSS) as the fundamental physical layer handoff decision indicator, which assists other......