NETWORK CONNECTION RELEASING METHOD USING RESOURCE RESERVATION PROTOCOL IN ALL-OPTICAL NETWORK

摘要

PURPOSE: A network connection releasing method using an RSVP(Resource Reservation Protocol) in all-optical network is provided to increase a stability of a network and effectively protect a network resource by preventing generation of a protection and restoration process. CONSTITUTION: A source node(10) inserts an error code(120) of Deletion in Process into a reservation error(ResvErr) message(110) and transmits it to an ingress node(20) of an all-optical network(S101). The ingress node(20) disables an alarm monitor(S102) and transmits an ACK message to the source node(10)(S103). An egress node(30) also receives an ResvErr message(110) and transmits the ResvErr message with the error code of Deletion In Progress inserted therein to a destination node(40). The destination node(40) turns off an alarm function on the LOL(Loss of Light)(S106) and transmits an ACK message to the egress node(30) of the all-optical network(S107). In addition, the destination node(40) releases every state related to connection and connections, sets a Path_State_Removing flag(150) of a path error(PathErr) message(140), and transmits it to the egress node(30) of the all-optical network(S108). The egress node(30) transmits an ACK message to the destination node(40)(S109), and transmits the PathErr message to a downstream(S110). The ingress node(20) transmits the PathErr message(140) to the source node(10)(S111). The source node releases every state and connection of itself, and transmits an ACK message(S112).