PROTECTION RESTORING AND SWITCHING METHOD OF A TRANSMISSION PATH IN A TRANSMISSION NETWORK CAPABLE OF SWITCHING THE TRANSMISSION PATH

摘要

PURPOSE: A protection restoring and switching method is provided to increase network usage rates for a reserved path by improving the efficiency of network resources.;CONSTITUTION: A network node(N1) sets an operation path by assigning resources for an operation path by receiving the setup of the operation path from a path control device(S302). The network node monitors the state information of the operation path(S304). The network node determines obstacle states(S306). A reserved path is set for assigning network resources(S308). The network node executes a protecting restoring switching process(S310). When the network node is a previous obstacle state, a reserved path is set(S314).;COPYRIGHT KIPO 2013;[Reference numerals] (AA) Start; (BB) Previous obstacle; (CC) Immediate protection restoring obstacle; (DD,GG) Yes; (EE,FF) No; (HH) End; (S302) Allocate resources and set an operation path; (S304) Monitor the state of the operation path; (S306) Previous obstacle or Immediate protection restoring obstacle ?; (S308,S314) Allocate resources and set a reserved path; (S310) Switch to the reserved path; (S312) Release the operation path and release the resources of the operation path; (S316) Immediately switch?; (S318) Operate a QoS performance reduction timer; (S320) Is QoS performance normal?; (S322) Release the reserved path and release the resources of the reserved path