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公开(公告)号：US06735392B1
公开(公告)日：2004-05-11
申请号：US09420329
申请日：1999-10-18
IPC分类号： G02F100
CPC分类号： H04J14/0295 , H04J14/0227 , H04J14/0241 , H04J14/0283 , H04J14/0286 , H04Q11/0062 , H04Q2011/0011 , H04Q2011/0081 , H04Q2011/0092
摘要： A system and method for transmitting and restoring an optical signal in an optical ring is presented. The optical ring comprises a plurality of nodes, each node containing an optical cross connect switching fabric coupled to a data switch. The optical cross connect switching fabric and the data switch are coupled to a short reach side of a wavelength translation device. A long reach side of the wavelength translation device is coupled to a dense wave division multiplex (DWDM) coupler. The optical cross connect switching fabric and the data switch include a protect channel and a working channel for transporting the optical signal. The wavelength translation device receives the optical signal at a high speed rate, where the optical signal is a short reach optical signal and originates from a high speed interface on the data switch. The wavelength translation device then maps the short reach optical signal into a long reach DWDM optical signal at the high speed rate and forwards, via the DWDM coupler, the long reach optical signal to an adjacent DWDM coupler located at an adjacent node. If a link failure occurs and has not recovered, and the protect channel is not available, optical cross connect switching fabrics at adjacent nodes on each side of the failed link switch the optical signal to an alternate diverse protect port. An optical pass through of the switched optical signal between any transit nodes in the optical ring is then configured resulting in a restoration path for the working channel.
摘要翻译： 提出了一种在光环中发送和恢复光信号的系统和方法。 光环包括多个节点，每个节点包含耦合到数据交换机的光交叉连接交换结构。 光交叉连接交换结构和数据交换机耦合到波长转换设备的短距离侧。 波长转换装置的长距离侧耦合到密集波分复用（DWDM）耦合器。 光交叉交换结构和数据交换机包括保护信道和用于传输光信号的工作信道。 波长转换装置以高速率接收光信号，其中光信号是短距离光信号，并且来自数据交换机上的高速接口。 然后，波长转换装置将短距离光信号以高速率映射成长距离DWDM光信号，并通过DWDM耦合器将长距离光信号转发到位于相邻节点的相邻DWDM耦合器。 如果链路故障发生并且没有恢复，并且保护信道不可用，则在故障链路的每一侧的相邻节点处的光交叉连接交换结构将光信号切换到备用的多样保护端口。 然后，在光环中的任何传输节点之间光交换光交换光路，从而产生用于工作信道的恢复路径。
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公开(公告)号：US6154296A
公开(公告)日：2000-11-28
申请号：US964823
申请日：1997-11-05
IPC分类号： H04B10/00 , H04B10/213 , H04J3/08 , H04B10/08
CPC分类号： H04B10/271 , H04B10/032 , H04B10/27 , H04B10/275 , H04J3/085
摘要： An optical communications network configured in a shared protect capacity architecture. The network includes a plurality of shared and unshared nodes; a plurality of working lines connecting the plurality of nodes to form a ring that shares two or more nodes with another ring; a shared protect fiber optic line connecting the two shared nodes; and a plurality of protect lines connecting the plurality of unshared nodes which are connected by the plurality of working lines. By optically coupling a first Add-Drop Multiplexer of a first shared node to a first port of an optical cross connect using a first connecting path; optically coupling a second Add-Drop Multiplexer of the first shared node to a second port of the optical cross connect using a second connecting path; and optically coupling a third port of the Optical Cross Connect to a second shared node through a shared protect path, both rings may use the shared protect path to re-route traffic therethrough in the event that one of the rings has a break which severs the working and protect lines which couple two of the nodes thereof. The reduction in the quantity of protect lines, hence the fiber, and the equipment resulting in the associated cost savings are transparent to bit or baud rate, type of optical fiber, and signal format.
摘要翻译： 配置在共享保护能力架构中的光通信网络。 网络包括多个共享和非共享节点; 连接所述多个节点以形成与另一个环共享两个或多个节点的环的多条工作线; 连接两个共享节点的共享保护光纤线路; 以及连接由所述多个工作线连接的所述多个非共享节点的多条保护线。 通过使用第一连接路径将第一共享节点的第一插入多路复用器光耦合到光交叉连接的第一端口; 使用第二连接路径将所述第一共享节点的第二插入多路复用器光耦合到所述光交叉连接的第二端口; 并且通过共享保护路径光学地将光交叉连接的第三端口耦合到第二共享节点，两个环可以使用共享保护路径来重新路由业务，如果其中一个环具有断开， 工作和保护耦合其两个节点的线路。 保护线路数量的减少，从而导致光纤和相关成本节省的设备对位或波特率，光纤类型和信号格式都是透明的。
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