A Cascaded Time Synchronization Method in Hybrid Networks

A technology of time synchronization and hybrid network, which is applied in the direction of time division multiplexing system, electrical components, multiplexing communication, etc., to achieve the effects of improving scalability, saving the number of sites, and high precision

Active Publication Date: 2019-01-11
BEIJING AEROSPACE AUTOMATIC CONTROL RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem of the present invention is: to overcome the deficiencies of the prior art, to propose a cascaded time synchronization method in a hybrid network, by solving the time synchronization problem of the parent network and the child network site in the hybrid bus network, the parent The number of stations that can be time-synchronized in a stratum network

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  • A Cascaded Time Synchronization Method in Hybrid Networks
  • A Cascaded Time Synchronization Method in Hybrid Networks
  • A Cascaded Time Synchronization Method in Hybrid Networks

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Embodiment

[0035] Such as figure 1 As shown, in the site network topology connection diagram of the embodiment of the present invention, RT1 is RT master , that is, as the station that initiates the time synchronization behavior in the 1553B bus, RT7 is a shared adaptation station, RT7 receives the 1553B bus synchronization information of RT1, and RT7 acts as a Uart master , as the control station of the serial bus network, is responsible for synchronizing the serial bus network. As a 1553B bus network station, RT7 can receive the information of RT1 and the information with time stamp in the serial bus network, and convert the time stamp into the time value in the 1553B bus network. RT7 has two independent timers inside, one is synchronized with the 1553B bus network time, and the other is synchronized with the serial bus network time. The serial bus in the embodiment selects RS485 serial bus.

[0036] Using RT1 in the 1553B network as a time synchronization control station, its metho...

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Abstract

The present invention discloses a cascading style time synchronization method in the hybrid networks. The cascading style time synchronization method comprises the following steps of (1) using a parent layer network time synchronization control station to send a time synchronization message to a shared adapter station; (2) after the shared adapter station receives the time synchronization message, analyzing to obtain the time Tsyn of a parent layer time system at the current moment, at the same time, recording the local time Tlocal_syn when the time synchronization message is received; (3) using the shared adapter station to carry out the time synchronization on the other stations in a sublayer network according to the time Tlocal of an own sublayer time system of the shared adapter station ; (4) after the shared adapter station receives a time marking message with a sublayer time system time mark tsub sent by any other station in the sublayer network, converting the time mark tsub into a time value TafterSyn in the parent layer network, feeding back to the parent layer network to realize the time synchronization between the hybrid networks. The cascading style time synchronization method in the hybrid networks of the present invention synchronize the time of the stations in a two-layer communication network on the basis of not influencing the time synchronization of the parent layer network and the sublayer network.

Description

technical field [0001] The invention relates to a cascading time synchronization method in a hybrid network, which is mainly oriented to an automated industrial control system, and is used to synchronize the time of each sub-equipment in an intelligent equipment and a large-scale automation system, so that all equipment in the entire system can use a unified The time base runs. Background technique [0002] In the design of large-scale intelligent equipment or industrial automation systems, the synchronization of the work of each device is usually extremely important for the correctness of the system operation. In order to enable each sub-equipment in the system to run according to the same clock beat, to make the action sequence of each equipment deterministic, and to make the test data comparable, it is necessary to synchronize the time of each equipment in the system. The system's modular and layered design ideas greatly increase the scalability of the system, but at the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/06
CPCH04J3/0638
Inventor 高飞崔宇邱枫刘思东丁万兵叶绍凯李慧隋强强仲宇张磊
Owner BEIJING AEROSPACE AUTOMATIC CONTROL RES INST
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