EP 0184606 A2 19860618 - Pager watch system utilizing time slot communication.
Title (en)
Pager watch system utilizing time slot communication.
Title (de)
Aufruf-Uhrsystem mit Zeitfensterkommunikation.
Title (fr)
Système d'appel-montre utilisant une communication à fenêtre de temps.
Publication
Application
Priority
US 67860384 A 19841205
Abstract (en)
A method and apparatus for transmitting paging and absolute time information to, and receiving such information at, a remote portable electronic timepiece and pager unit during a short time slot assigned to the pager unit is disclosed. In the pager unit, an oscillator is coupled to a timer which produces a time display. These functions are constantly powered. The timer periodically causes power to be supplied to a receiver and message decoding components of the pager unit during a short time slot in which transmitted data is to be received. The receiver detects and reconstitutes a transmitted signal. The transmitted signal is processed through a decoder which extracts paging and time update data. If the paging data includes the pager unit's ID number, the unit indicates that a page has been received. The time update data extracted from the transmitted signal is used to synchronize a timer in the pager unit. The timer provides an accurate time indication for the watch function. The same timer additionally determines when power is supplied to the pager unit's receiver and message decoder components so that they will be powered during the short time slot.
IPC 1-7
IPC 8 full level
G04G 21/04 (2013.01); G08B 3/10 (2006.01); G08B 5/22 (2006.01); H04M 3/42 (2006.01); H04B 7/26 (2006.01); H04W 52/02 (2009.01); H04W 84/02 (2009.01)
CPC (source: EP)
G04G 21/04 (2013.01); G04R 20/14 (2013.01); G04R 20/20 (2013.01); G08B 3/1016 (2013.01); G08B 5/222 (2013.01); G08B 5/223 (2013.01); G08B 5/228 (2013.01)
Designated contracting state (EPC)
CH DE FR GB LI
DOCDB simple family (publication)
EP 0184606 A2 19860618; EP 0184606 A3 19880330; CA 1262385 A 19891017; ES 549571 A0 19871116; ES 8800760 A1 19871116; IT 1183035 B 19871005; IT 8548870 A0 19851203; JP H0588574 B2 19931222; JP S61136330 A 19860624
DOCDB simple family (application)
EP 85107635 A 19850620; CA 496881 A 19851204; ES 549571 A 19851204; IT 4887085 A 19851203; JP 17870685 A 19850815