Multi-host system, time synchronization method, and program
JP7636062B2Active Publication Date: 2025-02-26NEC PLATFROMS LTD
Patent Information
- Application Number
- JP2023039505
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2023-03-14
- Publication Date
- 2025-02-26
- Estimated Expiration
- 2043-03-14
Smart Images
Figure 0007636062000001 
Figure 0007636062000002 
Figure 0007636062000003
Abstract
To surely synchronize time of all of hosts in accordance with a delay of a transmission channel.SOLUTION: A master host 40 transmits a clock in a forward direction, and measures a delay time of an entire annular transmission channel from a time when it is returned to the master host 40 via a plurality of slave hosts 50a to 50c on the annular transmission channel. The master host 40 transmits a pulse in a forward direction and transmits the pulse in a reverse direction. Each of the slave hosts 50a to 50c receives the pulse transmitted in the forward direction (or the reverse direction) from the master host 40, then measures a time period until the pulse transmitted from the master host 40 in the reverse direction (or the forward direction) is received, calculates a delay time with respect to the master host 40 in the forward direction from the time measured, and adjusts a stepping clock in accordance with the delay time.SELECTED DRAWING: Figure 1
Need to check novelty before this filing date? Find Prior Art
Citation Information
Patent Citations
High-precision time synchronization method suitable for annular networking system
CN111698140A
Node device
JP2011139198A
Communication system, communication system control method, master device, maser device control method, master device control program, slave device, slave device control method, and slave device control program
JP2013146006A
Communication apparatus and time synchronizing method therefor
JP2017098694A
Slave, serial communication system, and communication method of serial communication system
JP2018157456A