公开(公告)号：US5159595A

公开(公告)日：1992-10-27

申请号：US286713

申请日：1988-12-20

申请人： Thomas P. J. Flanagan ,  James A. McEachern ,  David J. Nicholson ,  Dino Diperna ,  Richard Romagnino ,  Wayne Ergle

发明人： Thomas P. J. Flanagan ,  James A. McEachern ,  David J. Nicholson ,  Dino Diperna ,  Richard Romagnino ,  Wayne Ergle

IPC分类号： H04J3/08 ,  H04L12/437 ,  H04L12/56 ,  H04Q11/04

CPC分类号： H04J14/0293 ,  H04J14/0283 ,  H04J3/085 ,  H04L12/437 ,  H04Q11/04 ,  H04J2203/0089 ,  H04L2012/5612

摘要： A transmission system comprises nodes coupled in a ring via two multiplexed transmission paths having opposite transmission directions. The two paths can be time, space, or wavelength division multiplexed. Bidirectional communications between any two nodes are provided in normal operation using both paths around a first, most direct, part of the ring. In the event of a fault affecting such communications, a protection switch is made to maintain bidirectional communications between the two nodes using both paths around a second, remaining, part of the ring. In this manner, each path can simultaneously carry both normal and protection switched signals. In an embodiment of the invention, only the two nodes adjacent a fault need be aware of the fault, each of these nodes effecting a protection switch for signals terminated at the node and effecting a protective loopback for other signals needing protection. The invention enhances the total capacity of the paths for carrying normal and protection switched signals. A network may comprise a plurality of such ring transmission systems intersecting at at least one network node, the network node comprising a node of each ring and a cross connect switch for switching signals therebetween.

摘要翻译： 传输系统包括通过具有相反传输方向的两个复用传输路径耦合在环中的节点。 这两条路径可以是时间，空间或波分复用。 在正常操作中，使用围绕环的第一，最直接的部分的两个路径来提供任何两个节点之间的双向通信。 在影响这种通信的故障的情况下，使用围绕第二剩余部分环路的两个路径来保护两个节点之间的双向通信的保护开关。 以这种方式，每个路径可同时携带正常和保护切换信号。 在本发明的一个实施例中，只有与故障相邻的两个节点需要知道故障，这些节点中的每个节点对终止在节点处的信号执行保护开关，并对需要保护的其他信号进行保护环回。 本发明增强了用于承载正常和保护开关信号的路径的总容量。 网络可以包括与至少一个网络节点相交的多个这样的环形传输系统，网络节点包括每个环的节点和用于在它们之间切换信号的交叉连接开关。