在现有SDH传输网的基础上建设IP广域网的最佳方案是引入弹性分组环技术,将IP数据业务与SDH传输通道完美地适配起来。文章分析了弹性分组环技术的特点,结合实例介绍了利用RPR over SDH技术组建IP网在增强网络的可靠性、提高SDH带宽利用...在现有SDH传输网的基础上建设IP广域网的最佳方案是引入弹性分组环技术,将IP数据业务与SDH传输通道完美地适配起来。文章分析了弹性分组环技术的特点,结合实例介绍了利用RPR over SDH技术组建IP网在增强网络的可靠性、提高SDH带宽利用率方面的优势,为利用SDH传输通道组建高可靠广域网提供思路和参考。展开更多
A congestion control algorithm is proposed for resilient packet ring (RPR) in this paper. In this algorithm, nonlinear explicit rate feedback control is used to ensure fast convergence and smooth equilibrium behavior....A congestion control algorithm is proposed for resilient packet ring (RPR) in this paper. In this algorithm, nonlinear explicit rate feedback control is used to ensure fast convergence and smooth equilibrium behavior. The algorithm combines explicit rate control with a deficit round robin (DRR) scheduler, which not only ensures fairness, but also avoids the implementation difficulties of explicit rate control algorithms. The algorithm has good features of fairness, fast convergence, smooth equilibrium, low queue depth, and easy implementation. It is insensitive to the loss of congestion control packets and can adapt to a wide range of link rates and network scales. It has solved the unbalanced traffic problem of spatial reuse protocol (SRP). The algorithm can be implemented on the multi-access control layer of RPR nodes to ensure fair and efficient access of the best-effort traffic.展开更多
弹性分组环(RPR)技术定义了一种新型的媒体接入控制(MAC)层协议,采用了共享介质传输和空间复用协议以及低于50 m s的故障恢复保护的弹性机制,支持服务等级协定(SLA,Service Level Agreem ent),即插即用,基于MAC的高速交换,可承载具有突...弹性分组环(RPR)技术定义了一种新型的媒体接入控制(MAC)层协议,采用了共享介质传输和空间复用协议以及低于50 m s的故障恢复保护的弹性机制,支持服务等级协定(SLA,Service Level Agreem ent),即插即用,基于MAC的高速交换,可承载具有突发性的IP业务,同时支持传统的语音传送,是未来城域网技术的重要发展方向。光纤技术的飞速发展使得RPR不再仅仅局限于城域网,还可以用于广域网。文章在基于RPR的低于50 m s的故障恢复保护的基础上,提出了具有高生存性的解决方案。展开更多
文摘在现有SDH传输网的基础上建设IP广域网的最佳方案是引入弹性分组环技术,将IP数据业务与SDH传输通道完美地适配起来。文章分析了弹性分组环技术的特点,结合实例介绍了利用RPR over SDH技术组建IP网在增强网络的可靠性、提高SDH带宽利用率方面的优势,为利用SDH传输通道组建高可靠广域网提供思路和参考。
基金Supported by the National Natural Science Foundation of China(No.69896242)
文摘A congestion control algorithm is proposed for resilient packet ring (RPR) in this paper. In this algorithm, nonlinear explicit rate feedback control is used to ensure fast convergence and smooth equilibrium behavior. The algorithm combines explicit rate control with a deficit round robin (DRR) scheduler, which not only ensures fairness, but also avoids the implementation difficulties of explicit rate control algorithms. The algorithm has good features of fairness, fast convergence, smooth equilibrium, low queue depth, and easy implementation. It is insensitive to the loss of congestion control packets and can adapt to a wide range of link rates and network scales. It has solved the unbalanced traffic problem of spatial reuse protocol (SRP). The algorithm can be implemented on the multi-access control layer of RPR nodes to ensure fair and efficient access of the best-effort traffic.
文摘弹性分组环(RPR)技术定义了一种新型的媒体接入控制(MAC)层协议,采用了共享介质传输和空间复用协议以及低于50 m s的故障恢复保护的弹性机制,支持服务等级协定(SLA,Service Level Agreem ent),即插即用,基于MAC的高速交换,可承载具有突发性的IP业务,同时支持传统的语音传送,是未来城域网技术的重要发展方向。光纤技术的飞速发展使得RPR不再仅仅局限于城域网,还可以用于广域网。文章在基于RPR的低于50 m s的故障恢复保护的基础上,提出了具有高生存性的解决方案。
