Two-way protection method of symmetrical system of GFP (Generic Framing Procedure) frame mapping encapsulation business

Abstract

A two-way protection method of a symmetrical system of a GFP (Generic Framing Procedure) frame mapping encapsulation business relates to the filed of GFP-F (Frame-mapped Generic Framing Procedure) encapsulation businesses. The two-way protection method comprises step 1, defining different code patterns according to different alarms to enable every alarm to be corresponding to two laser state types and namely the alarms to trigger an open mode and an off mode of a laser; step 2, judging whether switching of a main link and a standby link occurs or not, checking a laser state type of a home terminal client side after a home terminal electric port side receives an alarm code pattern if yes and performing comparison with a current laser state type and updating the state type to a state type which is corresponding to a high priority alarm if the laser state type is an off state type; step 3, determining whether the home terminal electric port side sends the code patterns which are corresponding to the alarms to an electric port of other side or not through the current laser state type; and step 4, utilizing different ways to achieve protection switching. The two-way protection method of the symmetrical system of the GFP frame mapping encapsulation business has the advantages of being capable of effectively achieving corresponding operation, achieving the protection switching and avoiding falling into a thinking or shocking state when fiber-cut of nodes occurs in the links.

Description

technical field [0001] The invention relates to the field of GFP-F (Generic Framing Procedure-Framed, general framing procedure-frame mapping) encapsulation business, specifically a bidirectional protection method for a symmetrical system of the GFP frame mapping encapsulation service. Background technique [0002] Such as figure 1 As shown, it is a protection model diagram of a symmetrical system, including OTN equipment (Optical Transport Network, Optical Transport Network) and ASON (Automatically Switched Optical Network, Automatically Switched Optical Network) equipment on both sides of it, wherein the OTN equipment is an axisymmetric structure , the GF12 of the first ASON equipment (the MSTP equipment in the ASON equipment, mainly SDH service equipment) is sequentially connected to the first tributary board, the first line board, the second line board, and the second line board in the OTN equipment. The tributary board and the GE (Gigabit Ethernet, Gigabit Ethernet, Gi...

AI Technical Summary

Problems solved by technology

However, this kind of switching is likely to fail to switch back to the original link after the switching, and fall into a deadlock state, or the two links switch back and forth, resulting in oscillation

In particular, when multiple nodes fail, a single disk falls into chaos. When multiple nodes recover one by one, they fall into deadlock or oscillation, and eventually the link cannot be recovered.

Images