Telecommunications – Transmitter and receiver at separate stations – Having measuring – testing – or monitoring of system or part
Patent
1997-02-20
2000-05-09
Vo, Nguyen
Telecommunications
Transmitter and receiver at separate stations
Having measuring, testing, or monitoring of system or part
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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Labonte Sylvain
Lupien Francis
Sawyer Francois
St-Pierre Sylvain
Turcotte Eric
Armstrong Darnell R.
Telefonaktiebolaget L M Ericsson
Vo Nguyen
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