Patent ID: 8665708
Filing Date: 2014-03-04
Classification: H04L

Abstract:
1. A method for acquiring a protocol message by a ring-network node comprising steps of: using dual fields to identify a Signal Fail (SF) protocol message, a Manual Switch (MS) protocol message and a Force Switch (FS) protocol message; wherein the step of using dual fields to identify the SF, MS and FS protocol messages comprises: using the code value in a Request/State field to identify the SF, MS and FS protocol message types, and further using different code values in a sub-code field to identify the SF, MS and FS protocol messages respectively; when a ring-network node supporting G.8032v1 receives an FS or MS protocol message, the ring-network node ignores the values in the sub-code field and processes the received FS or MS protocol message as a SF protocol message; and when a ring-network node supporting G.8032v2 receives an SF, MS or FS protocol message, the ring-network node processes the received SF, MS or FS protocol message as SF, MS or FS protocol message according to the massage types determined based on both code value in the Request/State field and the code value in the sub-code field.