Method for Measuring Transmission Delay of Asymmetric Optical Fiber Links
A fiber optic link and transmission delay technology, applied in transmission systems, electromagnetic wave transmission systems, multiplexing communications, etc., can solve the problem that the test method cannot be applied to asymmetric optical fiber links with optical amplifiers, IEEE1588 is not applicable to asymmetric fiber optic link
Inactive Publication Date: 2018-06-12
SOUTHWEST UNIVERSITY FOR NATIONALITIES
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[0007] Aiming at the fact that existing test methods cannot be applied to asymmetric optical fiber links with optical amplifiers, the purpose of the present invention is to solve the problem that IEEE 1588 is not applicable to asymmetric optical fiber links, and propose a method for measuring the time delay of asymmetric optical fiber links method, which is also suitable for measuring the time delay of asymmetric fiber links with optical amplifiers
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[0071] The specific embodiment of the present invention is described in further detail below: the present embodiment is implemented under the premise of the technical solution of the present invention, and detailed implementation and specific operation steps are provided, but the protection scope of the present invention is not limited to the following the described embodiment.
[0072] For ease of understanding, in this embodiment, 1550 nm and 1310 nm commonly used in existing optical communication systems are selected as working wavelengths. The device for measuring the time delay of an asymmetric optical fiber link according to the embodiment of the present invention is composed of a master station device and a slave station device. The master station equipment includes 1550nm optical transmitter, 1310nm optical transmitter, optical receiver, and calculation processing unit; the slave station equipment is the same as the master station equipment, and also includes 1550nm op...
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The invention relates to the technical field of optical fiber communication and time-frequency synchronization, in particular to a method for measuring the transmission delay of an asymmetric optical fiber link, by sending optical signals of different wavelengths in the uplink and downlink optical fibers between the master station equipment and the slave station equipment , to measure the length of the uplink and downlink optical fiber between the master station equipment and the slave station equipment, then calculate the time deviation between the master station equipment and the slave station equipment, and then correct and compensate the time deviation, so as to realize the master station equipment and the slave station equipment Time synchronization of slave devices. This method proposes a new measurement method for the transmission delay difference problem existing in the asymmetric optical fiber link, and improves the measurement accuracy of the transmission delay of the asymmetric optical fiber link by using the method of correction coefficient; the IEEE 1588 The time synchronization technology can be applied to an optical fiber link including an optical amplifier, and solves the problem of measuring the asymmetric time delay of an optical fiber link in an optical communication system.
Description
technical field [0001] The invention relates to the technical field of optical fiber communication and time-frequency synchronization, in particular to the measurement of transmission time delay of an asymmetric optical fiber link. Background technique [0002] At present, in a packet transport network (PTN, Packet Transport Network), the IEEE 1588 protocol is generally used to transmit time synchronization signals to each node device in the network, thereby realizing time synchronization of the entire communication network. IEEE 1588 is the main technical means to replace satellite timing systems such as GPS / GLONASS / Beidou satellites to solve the time synchronization problem of communication networks. The full name of the IEEE1588 protocol is "Precise Network Measurement and Control System Clock synchronization Protocol Standard", which is a precision time protocol (Precision Time Protocol, PTP) suitable for distributed control systems with multi-point communication. Using...
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IPC IPC(8): H04J3/06H04B10/079
CPCH04B10/0795H04J3/0638
Inventor 黄勤珍彭良福苗峰
Owner SOUTHWEST UNIVERSITY FOR NATIONALITIES