Test method of difference time delay of optical network

Abstract

The invention relates to a test method of the difference time delay of an optical network, belonging to the technical field of communication. The test method comprises the following steps of: initializing, sending test data packets testing link communication to a terminal end or a source end through a loopback link by a service triggering module; carrying out state update on the terminal end and the source end, and then sending a request for establishing a label switching path to a GMPLS (Generalized Multi-Protocol Label Switching) control plane by the service triggering module; recording path establishment successful time T1 and starting the switching processing of the test data packets by the service triggering module to obtain switching time T2; and subtracting the path establishment successful time T1 with the switching time T2 so as to obtain solved label switching path (including one-way and two-way paths) establishment difference time delay. The method and the technical scheme capable of simply, conveniently, fast and accurately measuring the path establishment difference time delay of the control plane and a data plane have convenient implementation and low cost and can help users to better learn about the dynamic characteristics of the GMPLS optical network.

Description

technical field

[0001] The invention relates to a method in the technical field of communication, in particular to a method for testing optical network differential delay based on a time stamp (Timestamp). Background technique

[0002] Generalized Multi-Protocol Label Switching (hereinafter referred to as GMPLS) is evolved from Multi-Protocol Label Switching (hereinafter referred to as MPLS). MPLS is an IP-based technology that uses labels to guide high-speed and efficient data transmission. And GMPLS expands the label, so that the label can not only mark the group, but also time slots, wavelengths and optical fibers. GMPLS is an important switching technology used in intelligent optical networks. It builds a unified control plane for multiple switching layers and separates it from the data plane. The physical separation of the control plane and the data plane can not only effectively reduce the probability of link failure, but also improve the dynamic performance of label ...