Telecommunications – Transmitter and receiver at separate stations – Having measuring – testing – or monitoring of system or part
Patent
1994-02-02
1996-01-09
Urban, Edward F.
Telecommunications
Transmitter and receiver at separate stations
Having measuring, testing, or monitoring of system or part
370 84, 455 88, H04B 1700, H04J 322
Patent
active
054836760
ABSTRACT:
In an exemplary embodiment, a base station maintains RF communication with mobile units using a polling protocol which may communicate at a higher or lower data rate, depending on the channel conditions. The base station transmits a general polling message at the lower data rate, and, associated therewith, transmits a test pattern for evaluation by the mobile units. Upon receipt of the transmissions, the mobile units analyze the test pattern to determine whether communication at the higher data rate is possible. Based on the determination, the mobile units select the appropriate rate to transmit data messages. The test pattern can be associated with a query from a mobile unit having a message to send, or with a contention polling message from the base.
REFERENCES:
patent: 4606044 (1986-08-01), Kudo
patent: 4763322 (1988-08-01), Eizenhhofer
patent: 4816820 (1989-03-01), Davis
patent: 4984290 (1991-01-01), Levine
Mahany Ronald L.
Sojka Marvin L.
West Guy J.
Norand Corporation
Urban Edward F.
Wisler Mark D.
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