Paging system with separate transmission paths for control and d

Details Paging system with separate transmission paths for control and d Paging system with separate transmission paths for control and d

1994-10-17

1997-02-11

Pham, Chi H.

Telecommunications

Transmitter and receiver at separate stations

Single message via plural carrier wave transmission

455 121, 455 512, H04B 725, H04Q 708

Patent

active

056030916

ABSTRACT:
A paging system includes a paging terminal that is operable to receive paging signals and transmit them up to a satellite (28) and down through a downlink (312) to stick locations (314), (316), (318), (320) and (322). Each of the sticks (314)-(322) is associated with a given locale (324), (326), (328), (330) and (332). The sticks are operable in a simulcast mode and also in a cellular mode. In the cellular mode, each of the sticks (314)-(322) is operable to receive a separate message that is distinct from the other cells. Pagers (36), having a known location at any of the locales (324)-(332) can then be selectively addressed and data transferred thereto. To prevent interference between adjacent RF locales, adjacent cells are not turned on during transmission to select cells in the cellular mode. These can be turned on at a different time. Orthogonal coding can be utilized such that adjacent cells can be turned on, thus increasing throughput. The paging system operates by providing a primary transmission path and a secondary transmission path. The primary transmission path is operable to transmit only control information. The secondary transmission path is operable to transmit only data. The data is received by a secondary paging receiver and stored in the memory whereas the terminal information is received by a primary paging receiver. Upon receiving control information associated with the stored paging information, the paging information is then transmitted by the paging transmitter.

REFERENCES:
patent: 5261118 (1993-11-01), Vanderspool, II et al.

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