公开(公告)号：KR100462408B1

公开(公告)日：2004-12-17

申请号：KR1020020078460

申请日：2002-12-10

Applicant: 한국전자통신연구원

Inventor： 박현 ,  양선희 ,  김상하 ,  이완섭

IPC: H04L12/28

CPC classification number: H04J14/0227 ,  H04J14/0284 ,  H04Q2011/0077 ,  H04Q2011/0081

Abstract: The present invention provides a fast rerouting method through Generalized Multi-Protocol Label Switching (GMPLS). The method performs fast rerouting through when a failure occurs on a link and node in an optical network having a plurality of nodes. In the fast rerouting method, current node of the optical network receives the path message for label request from a higher node thereof and establish the main LSP. Further, the current node calculates a detour path therefrom to a next but one node thereof so as to provide against a failure of the next node. Further, if it is checked that the Loss Of Light (LOL) occurs in the current node, the current node establishes the detour path to allow data to flow through the calculated detour path.

Abstract translation: 本发明通过通用多协议标签交换（GMPLS）提供快速重路由方法。 该方法通过在具有多个节点的光网络中的链路和节点上发生故障时执行快速重路由。 在快速重路由方法中，光网络的当前节点接收来自其较高节点的用于标签请求的路径消息并建立主LSP。 此外，当前节点计算从其到下一个节点的迂回路径，以便提供下一个节点的故障。 此外，如果检查当前节点中发生光损耗（LOL），则当前节点建立绕行路径以允许数据流经计算出的绕行路径。

公开(公告)号：KR1020040050601A

公开(公告)日：2004-06-16

申请号：KR1020020078460

申请日：2002-12-10

Applicant: 한국전자통신연구원

Inventor： 박현 ,  양선희 ,  김상하 ,  이완섭

IPC: H04L12/28

CPC classification number: H04J14/0227 ,  H04J14/0284 ,  H04Q2011/0077 ,  H04Q2011/0081

Abstract: PURPOSE: A fast re-route method through a GMPLS(Generalized Multi-Protocol Label Switching) function is provided to carry out a local repair process for a link restoration by using GMPLS signaling, routing, and LMP(Link Management Protocol) information, thereby realizing the link restoration. CONSTITUTION: If a node receives an LOL(Loss of Light) message(S601), the node extracts a port and a link number by referring to a link information table(S602). The node extracts label information(S603), and extracts an incoming port and a link number(S604). The node requests an OCMF to perform a test for confirming whether an LOL is generated in the incoming port(S605) and then receives a test result from the OCMF(S606). If the LOL is generated, the node writes a channel status message for informing an upper node of a failure(S608), and updates information on a link information table for the current node(S609). The written channel status message is transmitted to the upper node(S610).

Abstract translation: 目的：通过GMPLS（广义多协议标签交换）功能快速重新路由方法，通过使用GMPLS信令，路由和LMP（链路管理协议）信息对链路恢复进行本地修复过程，从而 实现链路恢复。 构成：如果节点接收到LOL（Loss of Light）消息（S601），则节点通过参照链接信息表来提取端口和链路号（S602）。 节点提取标签信息（S603），并提取输入端口和链路号（S604）。 节点请求OCMF执行用于确认是否在入局端口生成LOL的测试（S605），然后从OCMF接收测试结果（S606）。 如果生成了LOL，则节点写入用于通知上层节点的故障的通道状态消息（S608），并且更新关于当前节点的链接信息表的信息（S609）。 写入的信道状态消息被发送到上层节点（S610）。