Diffserv AQM algorithm for edge and core routers  

作　　者：Yang Xiao Lingyun Lu Kiseon Kim 

机构地区：[1]Institute of Information and Science, Beijing Jiaotong University, Beijng 100044, R R. China [2]Department of Information and Communications, Gwangju Institute of Science and Technology, Gwangju 500-712, Korea

出　　处：《Journal of Systems Engineering and Electronics》2010年第6期1033-1040,共8页系统工程与电子技术（英文版）

基　　金：supported by the Beijing Natural Science Foundation (4102050);NSFC-KOSEF Joint Research Project of China and Korea(60811140343), and the CDSN, GIST.

摘　　要：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.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.

关 键 词：active queue management （AQM） core router control multilayer network. 

分 类 号：TP393[自动化与计算机技术—计算机应用技术] TN915.05[自动化与计算机技术—计算机科学与技术]