Updating method of clock skew as well as announcing method and device of clock skew information

Abstract

The invention discloses an updating method of clock skew as well as an announcing method and device of clock skew information, belonging to the technical field of communications. The updating method comprises the steps: receiving information from a communication opposite terminal; obtaining the types of the information according to the information type fields of the information; and updating the local clock skew according to the types of the information and the information. The device comprises a receiving module, an obtaining module and an updating module. When the information from the communication opposite terminal is received, the information types are obtained according to the information type fields of the information, and the local clock skew is correspondingly processed according to the information types, so that when 0-length application data are received, the information types can be exactly distinguished, the dead circulation of the information can be avoided, and the communication error rate can be reduced.

Description

Clock offset update method, clock offset message notification method and device technical field The invention relates to the technical field of communication, in particular to a method for updating a clock offset, a method and a device for notifying a clock offset message. Background technique CTCS-3 (China Train Control System, China Train Control System Level 3) train operation control system standard is the main technical standard of China Railway Passenger Dedicated Line with a speed of 300-350 km per hour, RSSP-II (Railway Signal Safety Protocol II, Railway Signal Safety Protocol II) (corresponding to ETCS (Europe Train Control System, European train control system) standard Subset098 protocol) is one of the important communication and interface protocols, used for RBC-RBC (RadioBlockCenter, radio block center), RBC-IL (Interlocking, interlocking), RBC-TSRS (TemporarySpeedRestrictionServer, temporary limit communication between servers). The RSSP-II protocol is mainl...

AI Technical Summary

Problems solved by technology

Therefore, the message length and the carried Lastreceivertimestamp timestamp can only be used to distinguish the three. When the 0-length application data is sent by mistake on the network, the receiver (A) will determine that it is a clock offset update request message from the peer end, and then send a response The message is sent to the peer (B), and when the peer (B) receives the response message, it will also determine that it is a clock offset update request message, and then reply with a clock offset update response message, which repeats itself, resulting in an endless loop of messages and a high communication error rate

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