Telecommunications – Transmitter and receiver at separate stations – Single message via plural carrier wave transmission
Patent
1994-06-24
1996-07-30
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
Single message via plural carrier wave transmission
455 541, 455 561, 34082544, 370 691, H04B 7208
Patent
active
055421156
ABSTRACT:
A two-way paging system utilizes four local frequencies for transmissions between pager units (22) and a central control station (20). A first local frequency (f.sub.1) carries a local clock; a second local frequency (f.sub.2) carries communications packets from the central control station to paging units; a third local frequency (f.sub.3) carries communication packets from the pager units to the central control station; and a fourth local frequency (f.sub.4) carries a status or request signal from the paging units (22) to the central control station (20). Transmissions on the fourth local frequency (f.sub.4) are in accordance with a time divided slot allocation among pager units accessing the central control station (20). For a two-way paging system having a plurality of central control stations (420.sub.x) servicing a corresponding plurality of cells, a total of eight frequencies are utilized within any one cell. Four of the utilized frequencies are the local frequencies (f.sub.1 -f.sub.4) [which may differ from cell to cell], and four of the utilized frequencies are lower power common frequencies or switching frequencies (C.sub.1 -C.sub.4) which are used to switch or hand-off a pager unit (422) traveling from one cell to another.
REFERENCES:
patent: Re32365 (1987-03-01), Sebestyen
patent: Re33417 (1990-10-01), Bhagat et al.
patent: 4644351 (1987-02-01), Zabarsky et al.
patent: 4747122 (1988-05-01), Bhagat et al.
patent: 4823123 (1989-04-01), Siwiak
patent: 4845491 (1989-07-01), Fascenda et al.
patent: 4870402 (1989-09-01), DeLuca et al.
patent: 4882579 (1989-11-01), Siwiak
patent: 4940963 (1990-07-01), Gutman et al.
patent: 5043721 (1991-08-01), May
patent: 5086501 (1992-02-01), DeLuca et al.
patent: 5109400 (1992-04-01), Patsiokas et al.
patent: 5111197 (1992-05-01), Ichikawa
patent: 5117449 (1992-05-01), Metroka et al.
patent: 5142279 (1992-08-01), Jasinski et al.
patent: 5153582 (1992-10-01), Davis
patent: 5170487 (1992-12-01), Peek
patent: 5224150 (1993-06-01), Neustein
patent: 5247700 (1993-09-01), Wohl et al.
patent: 5260986 (1993-11-01), Pershan
patent: 5285496 (1994-02-01), Frank et al.
patent: 5396496 (1995-03-01), Ito et al.
patent: 5485463 (1996-01-01), Godoroja
Tsui Po S.
Wong Gabriel K.
Eisenzopf Reinhard J.
Le Thanh
Pioneer Tech Development Limited
LandOfFree
Paging method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Paging method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Paging method and apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1668459