With the growth of long distance oil and gas pipeline in our country, the optical communication network of oil and gas pipeline valve chamber plays an important role in the intelligent management of oil and gas pipeline. However, as an important basis for evaluating the optimization of optical communication network services, time delay faces challenges due to issues such as the existing optical communication network in oil and gas pipeline valve chambers and their relatively outdated technological systems. Problems with optical network Delay Measurement (DM) include low automation, long DM operation cycles, and significant impact on the normal operation of the carried services. Therefore, there is an urgent need for a new DM solution.

Based on the technology of Optical Transport Network (OTN) Optical Service Unit (OSU), a high precision delay calculation method is implemented by using the DM field in OSU frame structure.

Through experimental tests, under various business scenarios and granularity, the high-precision DM mechanism of optical communication network of oil and gas pipeline valve chamber designed in this paper can grasp its delay state in real time under the premise of ensuring DM accuracy, no manual field operation and normal business operation.

It is proved that the high-precision DM mechanism based on OTN OSU can provide strong support for the optimization and guarantee of service delay in optical communication networks within oil and gas pipeline valve chambers.