Telephonic communications – Audio message storage – retrieval – or synthesis
Patent
1992-10-23
1995-03-07
Kuntz, Curtis
Telephonic communications
Audio message storage, retrieval, or synthesis
455 561, 375202, H04M 1100
Patent
active
053965418
ABSTRACT:
Signaling a mobile unit to transmit a synchronization pattern with voice information upon detecting from the signal strength of the wireless mobile unit by a base station that the mobile unit is approaching a minimum threshold. Where the voice information is initially being transmitted in a set of frequency hopping channels using spread spectrum transmission, the synchronization pattern is transmitted in one or more of the set of frequency hopping channels. In addition, the base station alerts a system controller to this fact, and the system controller requests that neighboring base stations monitor the set of frequency hopping channels being transmitted by the mobile unit. In order to synchronize to the mobile unit, the base stations utilize the synchronization pattern to come into synchronization with the mobile unit. The system controller transfers the wireless mobile unit to the base station which is receiving the strongest signal strength.
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Farwell Charles Y.
Miller Richard D.
Windhausen Richard A.
AT&T Corp.
Kuntz Curtis
Moran John C.
Rana I.
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