Transmission of data over a radio frequency channel

Details Transmission of data over a radio frequency channel Transmission of data over a radio frequency channel

2006-08-15

2006-08-15

Vo, Nguyen T. (Department: 2618)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S557000

Reexamination Certificate

active

07092718

ABSTRACT:
An improved system for the transmission of data over a cellular telephone channel is provided. The system is especially adapted to reduce the cost associated with cellular telephone calls by allowing data transmission only when the channel signal level is greater than a pre-defined value, so as maximize the probability that a transmission will be successful. In addition, the system provides for user transparent reconnection and reestablishment of a dropped link, allowing transmission to continue where dropped without the need to retransmit data already successfully received. As an additional benefit, the system provides a mechanism for call timing and billing so that an estimated bill may be generated based on connection time.

REFERENCES:
patent: 4697281 (1987-09-01), O'Sullivan
patent: WO 91/07044 (1991-05-01), None

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