Support of multiple modulation levels for a cellular traffic cha

Telecommunications – Transmitter and receiver at separate stations – Having measuring – testing – or monitoring of system or part

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455552, 455553, 370465, 371 51, H04B 1700

Patent

active

060615494

ABSTRACT:
A D-AMPS+ cellular communications air interface is presented wherein a packet data control channel and packet data traffic channel is supported in addition to the conventional digital control channel and digital traffic channel. In particular, the packet data control channel, packet data traffic channel and digital traffic channel support multiple modulation level operation (high versus low). Procedures are provided for intracell and intercell modulation transition of mobile station communications carried by a traffic channel. In particular, these procedures facilitate intracell and intercell modulation transition to a traffic channel using the same level of modulation, as well as intracell and intercell (fall-forward and fall-backward) modulation transition to a traffic channel using a different level of modulation.

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Estimation of the Performance of an Adaptive Air Interface in Mobile Radio by J. Dunlopt, P. Cosimini, G. Graham and E. Le Strait Department of Electronic and Electrical Engineering, University of Straithclyde, Glasgow, G1 1XW, Scotland RACE Mobile Telecommunications Workshop, Amsterdam (May 17-19, 1994).
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