摘要
伴随着异构网络的迅猛发展,多模终端日益普及.当终端上有多种不同类型的会话业务流需要传输时,如何根据不同类型业务流的特点、不同网络的当前链路状况、通信费用、传输功耗等因素,在终端所接入的多个网络之间自动地、合理地分发业务流就成为一个非常重要的问题.文中提出了一套针对多模终端业务流分发问题的解决方案,包括支持业务流自动分发的多模终端框架结构及其包含的业务流分发算法.方案引入优先级的概念使得高等级的业务流在网络负载较重时具有使用网络的优先权,同时方案包含了一种权重自生成方法,为影响业务流分发决策的多个属性自动生成权重,减轻了用户负担,避免了由用户直接指定权重的困难.仿真实验的结果表明,文中方案能够根据当前各接入网络的链路状况、不同类型业务流的服务质量需求、传输功耗、通信成本等多个属性,自动为多模终端上运行的各条业务流选择合理的接入网络,同时方案在吞吐量、会话完成率等性能指标上也拥有显著改进.
With the rapid development of heterogeneous networks,multimode terminals become more and more popular.However,when there are several different kinds of sessions requiring transmission simultaneously,how to distribute these session flows among the available interfaces of the terminal according to the different features of the flows,the current conditions of the candidate access networks,the communication monetary cost and power consumption is a new challenge.This paper proposes a new solution to the flow distribution problem for multimode terminals.The proposal includes an architecture model of the multimode terminal as well as the corresponding flow distribution algorithm.The proposal utilizes the notion of priority,ensuring the more important sessions have preferential use of the network resources when the traffic intensity was high.In addition,the proposal introduces a new mechanism to automatically determine the weights of different attributes which influences the flow distribution decision making,thus avoiding the difficulty to specify the weights manually.Simulation results show that the proposal can efficiently distribute the session flows on a multimode mobile terminal to the appropriate networks for transmission.Also,the proposal provides a significant improvement to performance indicators such as throughput and session completion rate.
出处
《计算机学报》
EI
CSCD
北大核心
2010年第6期1004-1013,共10页
Chinese Journal of Computers
基金
国家自然科学基金课题“移动即时通信关键技术研究”(90604016)
国家“九七三”重点基础研究发展规划项目基金课题“面向业务感知的网络测量理论与方法”(2007CB310702)资助~~
关键词
业务流分发
异构网络
多模终端
flow distribution
heterogeneous network
multimode terminal
