Method for providing a precise network time service
Patent 6438702 Issued on August 20, 2002. Estimated Expiration Date: 
December 21, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 21, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod and apparatus for precision time distribution in telecommunication networks Distributed time synchronization system and method Method for compensating time in transmitting unit and transmitting system Real time clock synchronization in a telecommunications network System and method for synchronizing time across a computer cluster Patent #: 6199169 InventorAssigneeApplicationNo. 468669 filed on 12/21/1999US Classes:713/400, SYNCHRONIZATION OF CLOCK OR TIMING SIGNALS, DATA, OR PULSES713/503Correction for skew, phase, or rateExaminersPrimary: Butler, Dennis M.Attorney, Agent or FirmInternational ClassesG06F 001/04G06F 001/12 AbstractA precise network time service that provides synchronization and time of day information. In accordance with my invention a user or customer premise equipment initiates the process by requesting time service from a network time server. The server responds by sending operation, administration, and maintenance (OAM) cells to the requesting party. These cells are immediately looped back to the time server and used to derive a minimum round trip time. Based on the minimum round trip time, the time server and the requesting party's equipment are subsequently synchronized. Once synchronized, delay measurements are used to maintain synchronism and provide time of day information so that such practical network problems as congestion may be monitored. | |
