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
This article introduces ZTE's IPv6 core router ZXR10 T1200. It describes the most important technologies of the router such as hardware architecture, ZXROS software platform based on the embedded real-time multi-t...This article introduces ZTE's IPv6 core router ZXR10 T1200. It describes the most important technologies of the router such as hardware architecture, ZXROS software platform based on the embedded real-time multi-task kernel, efficient IPv6 forwarding mechanism and IPv4-to-IPv6 transition technology. The successful development of the ZXR10 T1200 indicates that ZTE, one of Chinese enterprises, is able to develop and offer the core equipment of the next-generation Internet—IPv6 core router.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This article introduces ZTE's IPv6 core router ZXR10 T1200. It describes the most important technologies of the router such as hardware architecture, ZXROS software platform based on the embedded real-time multi-task kernel, efficient IPv6 forwarding mechanism and IPv4-to-IPv6 transition technology. The successful development of the ZXR10 T1200 indicates that ZTE, one of Chinese enterprises, is able to develop and offer the core equipment of the next-generation Internet—IPv6 core router.
