Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Patent
1997-08-21
2000-06-20
Pham, Chi H.
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
370332, H04Q 700
Patent
active
060785705
ABSTRACT:
A method and system for mobile assisted hand-off between base stations using different carrier frequencies in a Code Division Multiple Access (CDMA) cellular system. In the method and apparatus, a mobile station performs handoff measurements on forward link transmissions of handoff candidate CDMA base stations, where the forward link transmissions are transmitted on a carrier frequency that differs from the forward link carrier frequency of the current base station. The handoff measurements are performed during selected transmission frames that define transmission periods on the reverse link by the mobile station. During the measurement time in the selected transmission frame, the mobile station does not receive (punctures) data sent to it on the forward link, and does not transmit data on the reverse link.
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Czaja Stash F.
Jorri Sakari
Niva Ilkka J.
Nokia Mobile Phones Limited
Pham Brenda H.
Pham Chi H.
Rivers Brian T.
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