The existing active queue management （AQM） algorithm acts on subscribers and edge routers only, it does not support differentiate-serve （Diffserv） quality of service （QoS）, while the existing diffserv QoS has no...The existing active queue management （AQM） algorithm acts on subscribers and edge routers only, it does not support differentiate-serve （Diffserv） quality of service （QoS）, while the existing diffserv QoS has not considered the link capacities between edge routers and connected core routers. When a core router in a two layers’ network experiences congestion, the connected edge routers have no ability to adjust their access data rates. Thus, it is difficult to achieve the congestion control for the large scale network with many edge routers and core routers. To solve these problems, two difffserve AQM algorithms are proposed for the congestion control of multilayer network. One diffserv AQM algorithm implements fair link capacities of edge routers, and the other one implements unequal link capacities of edge routers, but it requires the core routers to have multi-queues buffers and Diffserv AQM to support. The proposed algorithms achieve the network congestion control by operating AQM parameters on the conditions of proposed three theorems for core and edge routers. The dynamic simulation results demonstrate the proposed control algorithms for core and edge routers to be valid.展开更多
在对网络拥塞控制进行分析的基础上,介绍了AQM(Active Queue Management)算法的特点及网络流量特征对AQM算法的影响。根据AQM算法的发展概况,将AQM算法中的DropTail算法、RED(Random Early Detection)算法、Adaptive RED算法、PI算法、R...在对网络拥塞控制进行分析的基础上,介绍了AQM(Active Queue Management)算法的特点及网络流量特征对AQM算法的影响。根据AQM算法的发展概况,将AQM算法中的DropTail算法、RED(Random Early Detection)算法、Adaptive RED算法、PI算法、REM(Random Early Marking)算法和AVQ(Adaptive Virtual Queue)算法进行了比较评价。并对AQM算法的反馈方式及AQM算法的控制理论进行了较为详细的分析与探讨。展开更多
当今时代,远程通信技术飞速发展,网络用户人数呈几何级数激增,这就使解决网络拥塞成为了一个亟待解决的问题.网络拥塞不仅会使网络通信质量下降,还会影响用户的服务质量水平QoS(Quality of Service),甚至还会影响到网络安全.本文通过分...当今时代,远程通信技术飞速发展,网络用户人数呈几何级数激增,这就使解决网络拥塞成为了一个亟待解决的问题.网络拥塞不仅会使网络通信质量下降,还会影响用户的服务质量水平QoS(Quality of Service),甚至还会影响到网络安全.本文通过分析当今因特网中流量控制,拥塞管理以及服务水平提供的机制,如TCP/IP协议中的开环,闭环控制和主动队列管理机制(AQM),介绍了一种改进之后的算法,将其与早期的简单弃尾算法和RED算法相比较,并将实验结果进行了总结.展开更多
基金supported by the Beijing Natural Science Foundation (4102050)NSFC-KOSEF Joint Research Project of China and Korea(60811140343), and the CDSN, GIST.
文摘The existing active queue management （AQM） algorithm acts on subscribers and edge routers only, it does not support differentiate-serve （Diffserv） quality of service （QoS）, while the existing diffserv QoS has not considered the link capacities between edge routers and connected core routers. When a core router in a two layers’ network experiences congestion, the connected edge routers have no ability to adjust their access data rates. Thus, it is difficult to achieve the congestion control for the large scale network with many edge routers and core routers. To solve these problems, two difffserve AQM algorithms are proposed for the congestion control of multilayer network. One diffserv AQM algorithm implements fair link capacities of edge routers, and the other one implements unequal link capacities of edge routers, but it requires the core routers to have multi-queues buffers and Diffserv AQM to support. The proposed algorithms achieve the network congestion control by operating AQM parameters on the conditions of proposed three theorems for core and edge routers. The dynamic simulation results demonstrate the proposed control algorithms for core and edge routers to be valid.
文摘在对网络拥塞控制进行分析的基础上,介绍了AQM(Active Queue Management)算法的特点及网络流量特征对AQM算法的影响。根据AQM算法的发展概况,将AQM算法中的DropTail算法、RED(Random Early Detection)算法、Adaptive RED算法、PI算法、REM(Random Early Marking)算法和AVQ(Adaptive Virtual Queue)算法进行了比较评价。并对AQM算法的反馈方式及AQM算法的控制理论进行了较为详细的分析与探讨。
文摘当今时代,远程通信技术飞速发展,网络用户人数呈几何级数激增,这就使解决网络拥塞成为了一个亟待解决的问题.网络拥塞不仅会使网络通信质量下降,还会影响用户的服务质量水平QoS(Quality of Service),甚至还会影响到网络安全.本文通过分析当今因特网中流量控制,拥塞管理以及服务水平提供的机制,如TCP/IP协议中的开环,闭环控制和主动队列管理机制(AQM),介绍了一种改进之后的算法,将其与早期的简单弃尾算法和RED算法相比较,并将实验结果进行了总结.
