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AssigneeKabushiki Kaisha Toshiba
InventorsMasashi Ito, Akira Kawarada
Estimating the term…
According to an embodiment, a time synchronization client includes one or more processors. The one or more processors are configured to perform time synchronization according to time information received by communicating with a time synchronization server at every synchronization period, and determine a second synchronization period shorter than a first synchronization period of when synchronization accuracy is a target level or more, as the synchronization period, when an elapsed time from activation of the time synchronization client does not exceed a judgment time.
A time synchronization client comprising:
A synchronization method executed in a time synchronization client, the synchronization method comprising:
A computer program product comprising a non-transitory computer-readable medium including programmed instructions, the instructions causing a computer to execute:
A synchronization system comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Using timestamps: bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays
Arrangements for synchronising receiver with transmitter: synchronisation information channels, e.g. clock distribution lines
Correction of synchronization errors: correction by delay
Multiplex communication
About 11 years 1 month of term left · ends 19 Nov 2037 (estimated)
This application is based upon and claims the benefit of priority from Japanese Patent Application No. 2017-000147, filed on Jan. 4, 2017; the entire contents of which are incorporated herein by reference.
Embodiments described herein relate generally to a time synchronization client, a synchronization method, a computer program product, and a synchronization system.
Systems to perform time synchronization among a plurality of devices are known. For example, a device that transmits a request signal for time adjustment to another device with constant periods, and performs time synchronization, using a response signal, to the request signal, received from the another device is disclosed. Further, a technology to set a synchronization period to be larger than initial setting, when an error between a time after time synchronization and a time of a server falls within a predetermined value, is disclosed.
FIG. 1 is a diagram illustrating a configuration example of a synchronization system;
FIG. 2 is a diagram illustrating a configuration example of a time synchronization client;
FIG. 3 is a sequence diagram illustrating an example of a procedure of communication of a synchronization message;
According to an embodiment, a time synchronization client includes one or more processors. The one or more processors are configured to perform time synchronization according to time information received by communicating with a time synchronization server at every synchronization period, and determine a second synchronization period shorter than a first synchronization period of when synchronization accuracy is a target level or more, as the synchronization period, when an elapsed time from activation of the time synchronization client does not exceed a judgment time.
Hereinafter, embodiments will be described in detail with reference to the appended drawings.
FIG. 1 is a diagram illustrating an example of a configuration of a synchronization system 1000 of the present embodiment. As illustrated in FIG. 1, the synchronization system 1000 includes a time synchronization server 12 and a time synchronization client 10. The time synchronization server 12 and the time synchronization client 10 are connected through a network 14.