Multiplex communications – Wide area network – Packet switching
Patent
1990-12-27
1994-03-08
Safourek, Benedict V.
Multiplex communications
Wide area network
Packet switching
370108, 379 60, 455 332, H04L 700
Patent
active
052933806
ABSTRACT:
A TDMA digital mobile communications system prevents TDMA frame synchronization from being asynchronous among radio base stations when a communication held by a mobile station is handed over from one service area to another. A control station sends a reset pulse for TDMA frame synchronization to the radio base stations each being situated in a particular service area over communications cables. In response, the radio base stations each generates a TDMA frame. The control station has a synchronous signal generator for generating the reset pulse while each radio base station has a time delay adjustment unit for adjusting the time delay of the reset pulse. The synchronous signal generator and the time delay adjustment units of the individual radio base stations perform measurement and setting such that a reset signal has the same time delay between the control station and all of the radio base stations. Hence, regarding a TDMA signal which the mobile station receives, TDMA frame synchronization is immediately set up at the time of hand-over and thereby prevents a voice signal from being interrupted.
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Marcelo Melvin
NEC Corporation
Safourek Benedict V.
LandOfFree
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