Pulse or digital communications – Repeaters – Testing
Patent
1995-03-03
1998-01-27
Chin, Wellington
Pulse or digital communications
Repeaters
Testing
370350, 34082544, 380 34, 368 47, 455 381, H04K 104, H04J 306, H04L 7027
Patent
active
057128677
ABSTRACT:
A method, apparatus and system is described for distributing accurate time-of-day information from an existing telecommunications infrastructure without modifying the existing infrastructure. In particular, the system comprises a base station device which continually receives extremely accurate time-of-day information from, by way of example and not by limitation, a GPS (Global Positioning Satellite) system, a local atomic dock, or a wired or wireless time standard. The base station periodically places time-of-day information into standard paging packets for transmission over a standard paging network. The paging packets are sent over telephone lines to the paging terminal for transmission whenever a time slot for transmission becomes available. The base station device records the actual time of transmission of the paging packet containing the time of day information and prepares the next time-of-day packet by placing the exact transmission time of the previous time-of-day packet sent. In the receiver, an algorithm is used to extrapolate the current time-of-day based on the history of transmitted packets containing measured time-of-day information of past transmissions.
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"International Search Report for International Application No. PCT/GB96/00268; Date of Completion--Jun. 6, 1996; Authorized Officer--T. Pieper", 6 pages.
Meiman Yehouda
Peleg Shimon
Porat Boaz
Yokev Hanoch
Yokev Oren
Chin Wellington
Luther William
NEXUS 1994 Limited
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