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    • 4. 发明授权
    • Optical communication network
    • 光通信网络
    • US06626590B1
    • 2003-09-30
    • US09455463
    • 1999-12-06
    • Naohide NagatsuMasafumi Koga
    • Naohide NagatsuMasafumi Koga
    • H04B1020
    • H04Q11/0062H04J14/0205H04J14/0212H04J14/0217H04J14/0219H04J14/0283H04J14/0295H04Q11/0071H04Q2011/0015H04Q2011/0018H04Q2011/0081
    • A wavelength division multiplexing ring network is constructed using a simple architecture and a fewer number of hardwares between the nodes compared with the conventional ring network. Each node is structured so that any number of multiple waves can be processed, and a fault in the network or within a node is resolved by providing a path-based protection so that switching can be performed without disrupting other nodes or even within one node. The network uses two or four lines of optical fibers, and a half of the fibers are used for communicating in a clockwise direction and a other half of the fibers are used for communicating in a counter-clockwise direction to form a logical network by optical paths contained in optical fibers so as to provide an equal number of relay nodes between two adjacent pairs of nodes throughout the network, where each node includes: multiple optical add/drop circuits; an optical path transmit end and an optical path receive end for freely selecting and outputting multiple combinations of wavelengths to be inserted in each node; and transmission lines provided between the optical add/drop circuits and the optical path transmit end, as well as between the optical add/drop circuits and the optical path receive end for transmitting any multiple waves to be processed within the node so as to establish mutual communication by transmitting processed multiple waves to other nodes. This network design enables to reduce the number of connections between the optical path transmit and receive ends, and also to reduce the number of optical signal op termination circuits.
    • 与传统的环网相比,使用简单的架构和节点之间的硬件数量来构建波分复用环网。 每个节点被构造成使得可以处理任何数量的多个波,并且通过提供基于路径的保护来解决网络中或节点内的故障,使得可以在不中断其他节点或甚至在一个节点内执行切换。 网络使用两条或四条光纤线,一半光纤用于沿顺时针方向通信,另一半光纤用于沿逆时针方向通信,以通过光路形成逻辑网络 包括在光纤中,以便在整个网络中的两个相邻节点对之间提供相等数量的中继节点,其中每个节点包括:多个光学分插电路; 光路发送端和光路接收端,用于自由选择和输出要插入每个节点的波长的多个组合; 以及设置在光分插电路和光路发送端之间的传输线,以及在光分插电路和光路接收端之间,用于发送在节点内要处理的任何多个波,以便建立相互 通过将处理后的多个波发送到其他节点进行通信。 该网络设计能够减少光路发送端和接收端之间的连接数量,并且还减少光信号运算终端电路的数量。
    • 5. 发明申请
    • Method for relieving failure, and packet communication device
    • 解决故障的方法和分组通信设备
    • US20090028043A1
    • 2009-01-29
    • US11665303
    • 2006-09-19
    • Yukio TsukishimaNaohide NagatsuAtsushi WatanabeAkira Hirano
    • Yukio TsukishimaNaohide NagatsuAtsushi WatanabeAkira Hirano
    • H04L12/26H04L12/56
    • H04L45/22H04L41/0663H04L41/0677H04L41/12H04L43/0811H04L45/02H04L45/26H04L45/28H04L45/50H04L45/56Y04S40/164Y04S40/166Y04S40/168
    • When a failure occurs on a path set between two packet communication devices, a protection path is set and the communication is recovered without having the effect of the path failure on devices other than the two packet communication devices. When a packet communication device detects a failure in a transmission line or a path between the device itself and a correspondent packet communication device to restore the communication, at least one of a topology modification notice pending step, in which the fact that the connection with the correspondent packet communication device being disconnected is not reported to the packet communication devices other than the correspondent packet communication device for a prescribed time, and a path restoration step, in which path setting signaling is performed to trigger cooperation of the path communication device and the correspondent packet communication device to set the protection path within the prescribed time, is executed together with a virtual interface setting modification step in which a virtual interface used for the path disconnected by the failure is set to the protection path.
    • 当在两个分组通信设备之间设置的路径上发生故障时,设置保护路径并恢复通信,而不会对两个分组通信设备之外的设备产生路径故障的影响。 当分组通信设备检测到传输线路中的故障或设备本身与通信分组通信设备之间的路径以恢复通信时,拓扑修改通知等待步骤中的至少一个,其中与 被断开的通信分组通信装置在规定时间内不向对方分组通信装置以外的分组通信装置报告,并且进行路径恢复步骤,其中进行路径设置信令以触发路径通信装置和通信对方的协作 在规定时间内设定保护路径的分组通信装置与虚拟接口设定修改步骤一起执行,其中将用于由故障断开的路径的虚拟接口设置为保护路径。