Resilient Packet Ring (RPR) is a Media Access Control (MAC) layer protocol that operates over a double counter-rotating ring network topology. RPR is designed to enhance Synchronous Digital Hierarchy(SDH) in order to ...Resilient Packet Ring (RPR) is a Media Access Control (MAC) layer protocol that operates over a double counter-rotating ring network topology. RPR is designed to enhance Synchronous Digital Hierarchy(SDH) in order to handle data traffic more efficiently. Since Intelligent Protection Switching(IPS) is one of the key technologies in ring networks, RPR provides two intelligent protection algorithms: steering and wrapping. While wrapping in RPR in essence inherits the automatic protection switching(APS) algorithm of SDH, it also wastes the bandwidth on the wrapping ringlets and may result in severe congestion. Whereas steering in RPR provides high bandwidth utilization, its switching speed is low, because it is indeed a high layer's restoration algorithm. In this paper, integrated self-healing(ISH) algorithm as an effective algorithm for RPR is proposed, which synthesizes the merits of the two algorithms by transporting healing signal and computing routing in MAC layer. At last, the performance of ISH algorithm is analyzed and simulated.展开更多
为了实现同步数字体系(Synchronous Digital Hierarchy,SDH)自愈环中业务和时钟合理、正确、实时地保护倒换,提出了一种基于自动保护倒换(Automatic Protection Switching,APS)协议和段开销中同步状态字节S1的保护倒换方案.针对网管台...为了实现同步数字体系(Synchronous Digital Hierarchy,SDH)自愈环中业务和时钟合理、正确、实时地保护倒换,提出了一种基于自动保护倒换(Automatic Protection Switching,APS)协议和段开销中同步状态字节S1的保护倒换方案.针对网管台下发的倒换命令、引发倒换的告警、上游端点传送的K1、K2字节分别处理,实现了业务的保护倒换并引发相应的时钟倒换.通过对典型操作实例的测试,验证了该方案的有效性和实时性.展开更多
文摘Resilient Packet Ring (RPR) is a Media Access Control (MAC) layer protocol that operates over a double counter-rotating ring network topology. RPR is designed to enhance Synchronous Digital Hierarchy(SDH) in order to handle data traffic more efficiently. Since Intelligent Protection Switching(IPS) is one of the key technologies in ring networks, RPR provides two intelligent protection algorithms: steering and wrapping. While wrapping in RPR in essence inherits the automatic protection switching(APS) algorithm of SDH, it also wastes the bandwidth on the wrapping ringlets and may result in severe congestion. Whereas steering in RPR provides high bandwidth utilization, its switching speed is low, because it is indeed a high layer's restoration algorithm. In this paper, integrated self-healing(ISH) algorithm as an effective algorithm for RPR is proposed, which synthesizes the merits of the two algorithms by transporting healing signal and computing routing in MAC layer. At last, the performance of ISH algorithm is analyzed and simulated.
文摘为了实现同步数字体系(Synchronous Digital Hierarchy,SDH)自愈环中业务和时钟合理、正确、实时地保护倒换,提出了一种基于自动保护倒换(Automatic Protection Switching,APS)协议和段开销中同步状态字节S1的保护倒换方案.针对网管台下发的倒换命令、引发倒换的告警、上游端点传送的K1、K2字节分别处理,实现了业务的保护倒换并引发相应的时钟倒换.通过对典型操作实例的测试,验证了该方案的有效性和实时性.
