Discontinuous transmission of circuit-switched analog cellular d

Details Discontinuous transmission of circuit-switched analog cellular d Discontinuous transmission of circuit-switched analog cellular d

1996-03-12

2000-07-11

Bost, Dwayne D.

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455 383, 455343, 455517, 455557, H04Q 720

Patent

active

060886005

ABSTRACT:
A cellular modem couples a data terminal equipment (DTE) to a portable mobile telephone that includes a cellular transceiver. The cellular modem monitors the activity of a circuit-switched analog cellular data connection between the DTE and a far-end data endpoint, e.g., a computer, through a cellular modem pool in the network. If the circuit-switched analog cellular data connection is idle for a predetermined amount of time, the cellular modem initiates a power-down sequence. For example, the cellular modem uses a protocol, e.g., a predefined tone, to indicate to the cellular modem pool that a power-down is occurring and that the circuit-switched analog data connection is to be put on hold. Upon receiving an acknowledgment from the cellular modem pool, the cellular modem provides a power-down signal to the cellular transceiver, which activates the "Discontinuous Transmission" feature for cellular voice, treating the circuit-switched analog cellular data call just like it was a circuit-switched analog cellular voice call.

REFERENCES:
patent: 4697281 (1987-09-01), O'Sullivan
patent: 4912756 (1990-03-01), Hop
patent: 5479480 (1995-12-01), Scott
patent: 5511237 (1996-04-01), Sakaguchi
patent: 5602869 (1997-02-01), Scott
patent: 5682417 (1997-10-01), Nitta
TIA/EIA Interim Standard IS-136.2, Telecommunications Industry Association, Dec. 1994, pp. i-vii, 98-100, 148-183.

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