TPS time synchronization improving algorithm based on IEEE1588 synchronization mechanism

Abstract

The invention discloses a TPS time synchronization improving algorithm based on an IEEE1588 synchronization mechanism, and belongs to the technical field of accurate clock synchronization. The TPS time synchronization improving algorithm based the IEEE1588 synchronization mechanism includes following steps: step 1, statistically calculating clock frequency deviation, and completing frequency synchronization; step 2, statistically calculating synchronous time deviation, communication time delay and the minimum number of messages needed for achieving designated accurate time synchronization, and completing initial time synchronization based on symmetry time delay; step 3, completing the accurate time synchronization based on the symmetry time delay by using the minimum message number, building fuzzy control which uses transmission error and transmission error change rate as input in the subsequent process, and performing on-line time deviation and frequency change adjustment. The TPS time synchronization improving algorithm based the IEEE1588 synchronization mechanism is compatible with the IEEE1588 synchronization mechanism well, provides the time synchronization more accurate than time synchronization provided by the IEEE1588 synchronization mechanism, effectively restrains a frequency drift problem and a random fluctuation problem in the time synchronization, can adapt to abrupt change of network topology, and can save a large amount of synchronization message spending in long time running.

Description

technical field [0001] The invention belongs to the technical field of precise clock synchronization, and in particular relates to an improved TPS time synchronization algorithm based on an IEEE1588 synchronization mechanism. Background technique [0002] In the traditional IP network, Mills proposed an Internet-based remote time synchronization technology, the Network Time Protocol (NTP). It is a typical master-slave synchronization method. The synchronization protocol message sent by the NTP client (or called the slave clock) contains the local time stamp T1, which is transmitted to the specified server. Once the server receives this message, it will record the message receiving timestamp T2. If the response time is required, the response message timestamp T3 will be attached to the protocol message and sent to the client. The slave clock will record the timestamp T4 of the message at this time. At this time, the time information of the message transmitted between the m...

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Problems solved by technology

But in fact, there are various external disturbances, or some accidental change factors, such as the loss of messages, timing erro

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