Communications system and receiver for use therein which indicat

Details Communications system and receiver for use therein which indicat Communications system and receiver for use therein which indicat

1993-04-09

1994-11-08

Marcelo, Melvin

Multiplex communications

Wide area network

Packet switching

34082544, 368 47, 455 511, H04H 300, H04J 306, H04L 700

Patent

active

053633776

ABSTRACT:
In a radio paging system each pager includes a timer having a clock to provide date and time stamping of received messages. To set the time of the pager clock, the system base station transmits time message signals at regular intervals but which are of variable accuracy due to delays in signal formatting and propagation. The invention provides a pager wherein a control unit sets the timer clock in accordance with the time indicated by a transmitted time message signal which is determined to be the most accurate, such signal being selected as a time reference signal. The most accurate signal is determined by comparing the differences in indicated times of transmission and reception of an already selected current time reference signal with those of a presently received time message signal. If the presently received time message signal is the more accurate, it is substituted as a new time reference signal in place of the current time reference signal.

REFERENCES:
patent: 4117661 (1978-10-01), Bryant, Jr.
patent: 4337463 (1982-06-01), Vangen
patent: 4845491 (1989-07-01), Fascenda et al.
patent: 5089814 (1992-02-01), DeLuca et al.
patent: 5285496 (1994-02-01), Frank et al.
Atsushi Murase, Japanese Patent Abstract 59-216334(A), Dec. 6, 1984.

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