一种基于EPN的拥塞价格机制  

EPN-based Congestion Pricing Mechanism

作　　者：陶俊[1] 帅典勋[1] 

机构地区：[1]华东理工大学计算机科学与工程系,上海200237

出　　处：《计算机科学》2007年第1期61-63,共3页Computer Science

基　　金：国家重点基础研究发展规划973资助项目(G1999032307);国家自然科学基金重点资助项目(60135010);国家自然科学基金资助项目(60073008);清华大学智能技术和系统国家重点实验到开放课题基金资助项目

摘　　要：网络发生拥塞的根本原因在于用户需求大于资源供给。利用价格机制中价格随供求关系而波动,又反过来影响用户需求的原理,可以均衡负载,抑制拥塞。针对网络中价格波动及价格传递的问题,本文提出了一种基于EPN(ExplicitPriceNotification)的拥塞价格机制,该机制通过路由器的平均队列长度与队列阈值的关系来反映用户需求的变化,并将价格调整的信息快速传递给用户,激励用户做出正确的资源决策,使网络维持在高吞吐量,低拥塞的状态。同时通过仿真试验分析了队列阈值参数对网络性能的影响。The basic reason of network congestion is the demand of user exceeds the supply of resource. In price mechanism, price is waved with the relation between supply and demand and on the other side effect the supply of user, so it can balance load and control congestion in network, In this paper, a kind of congestion price mechanism based on EPN（Explicit Price Notification） is proposed, which reflects the change of user demand through the relation between the average queue length of route and queue threshold, and transmit the information of price adjustment to user very quickly, in order to promote user to make the sound decision on resource and then to keep the network in high through put and low congestion state. And by means of simulation, the influence of queue threshold to network efficiency is analyzed.

关 键 词：价格机制 供求关 RED/ECN 拥塞 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]