Telecommunications – Carrier wave repeater or relay system – Portable or mobile repeater
Patent
1996-12-20
1999-09-14
To, Doris H.
Telecommunications
Carrier wave repeater or relay system
Portable or mobile repeater
455 674, 455 676, 370324, 370519, H04B 715
Patent
active
059536373
ABSTRACT:
In a conventional Time Division Multiple Access (TDMA) wireless system, the specified distance between a mobile unit and the base transceiver system (BTS) cannot exceed predetermined distances because of time slot synchronization constraints. In this approach to extending TDMA system coverage, in-band translator components are located in the center of remote cells which would normally contain a base transceiver system (BTS). The in-band translators include a loop back circuit that permits a host BTS to measure the propagation time delay by sending test access signals between the host BTS and each in-band translator. The measurements are then used to adjust a time delay in an uplink signal as received from each in-band translator by the BTS in normal operation.
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Supplemental Product Information of 3dbm, Inc.,HPT Series 6-Channel High-Power Cell Site Expander pp. 1-25.
Advertisement: Alcatel, "Extended Cells Improve Rural GSM Coverage" Mobile Communications International, p.A8, Sep./Oct. 1995.
Advertisement: 3dbm,Inc. HPT Series, "High Power Cell Site Expander".
Advertisement: Allen Telecom Group Systems "PMR-722GC1 Sector-Extender Repeater".
Coons David D.
Schmutz Thomas R.
AirNet Communications Corporation
Paige Russell O.
To Doris H.
LandOfFree
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