Service time synchronization method for the industrial Internet of things

Abstract

The invention relates to the field of the Internet of things, and particularly relates to the industrial Internet of things, such as an industrial control service time synchronization scheme design of a smart power grid. In an application environment of the industrial Internet of things, the invention provides a service message time synchronization scheme, for overcoming the defect that a service terminal has no time synchronization function with an information master station. It can be seen from analysis that, the scheme can be used for guaranteeing the time synchronization of a service message between a terminal device and the information master station in the case of no congestion of the network, and can be used for guaranteeing the service message to meet the time sequence logic requirements of the terminal device in the case of congestion of the network, so the scheme is a weak synchronization technology. Meanwhile, the invention provides a three-level time synchronization structure suitable for the construction of the smart power grid by combining the time synchronization scheme with the current situation of the power grid. The three-level time synchronization structure can support whole network time synchronization of a power system, guarantee the time synchronization and time sequence requirements of a power service message and meet the demands of multi-service access and multi-service protocol type conversion of a master station of the power system.

Description

technical field [0001] The present invention relates to the field of the Internet of Things, in particular to the industrial Internet of Things, such as the design of time synchronization schemes for smart grid industrial control services. Background technique [0002] In the actual application scenario of the Industrial Internet of Things, a large number of industrial control services are collected and delivered between the informatization master station and the business terminal equipment, and the business terminal equipment has requirements for the timing logic of business messages. In different industrial Internet of Things, different applications have different precision requirements for time synchronization, and the higher the precision requirement, the better. Realizing high precision will increase the cost of equipment and make the implementation more complicated. In principle, it can meet the application requirements. Minimum precision is sufficient. For example, t...

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Problems solved by technology

At the same time, the cost of this method is very high, and the application scenarios are also greatly restricted; b) No other measures are taken, only a place close to the terminal equipment is considered when selecting the site for the construction of the main station

This method is to ensure the time synchronization and timing logic of business messages under the assumption that the transmission delay of business messages is much smaller than the sending delay, but this method has no reliable guarantee and cannot fundamentally solve the problem; c) For most Class B devices, no measures have been taken to ensure the time synchronization and timing logic of service packets at this stage

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