Airbiquity Inc.

Robert Leyendecker

Dan Alan Preston

Joseph D Preston

Rod L Proctor

Wayne Eatherly

Philip Ray Smith

Phillip R Smith

An inband signaling modem communicates digital data over a voice channel of a wireless telecommunications network. An input receives digital data. An encoder converts the digital data into audio tones that synthesize frequency characteristics of human speech. The digital data is also encoded to prevent voice encoding circuitry in the telecommunications network from corrupting the synthesized audio tones representing the digital data. An output then outputs the synthesized audio tones to a voice channel of a digital wireless telecommunications network.

In-band signaling for data communications over digital wireless telecommunications networks

Method for in-band signaling of data over digital wireless telecommunications networks

An inband signaling modern communicates digital data over a voice channel of a wireless telecommunications networks. An input receives digital data. An encoder converts the digital data into audio tones that synthesize frequency characteristics of human speech. The digital data is also encoded to prevent voice encoding circuitry in the telecommunications network from corrupting the synthesized audio tones representing the digital data. An output then outputs the synthesized audio tones to a voice channel of a digital wireless telecommunications network.

Synchronizer for use with improved in-band signaling for data communications over digital wireless telecommunications networks

Network delay is determined in order to synchronize a clock in a mobile station with a reference clock. Tones are generated that represent a sequence of bits in a synchronization flag. The tones are sampled beginning at a selected sample start time. The sampled tones are demodulated to identify the bit values in the synchronization flag. The demodulator is synchronized with the sampled tones in the synchronization flag by shifting the sample start time until the samples generate an optimum synchronization value. A reference time is then identified according to the optimum sample start time.

Network delay identification method and apparatus

Cellular telephone having improved in-band signaling for data communications over digital wireless telecommunications networks

Software code for improved in-band signaling for data communications over digital wireless telecommunications networks

Network delay is determined in order to synchronize a clock in a mobile station with a reference clock. Tone are generated that represent a sequence of bits in a synchronization flag. The tones are sampled beginning at a selected sample start time. The sampled tones are demodulated to identify the bit values in the synchronization flag. The demodulator is synchronized with the sampled tones in the synchronization flag by shifting the sample start time until the samples generate an optimum synchronization value. A reference time is then identified according to the optimum sample start time.

In-band signaling for data communications over digital wireless telecommunications network

Multichannel in-band signaling for data communications over digital wireless telecommunications networks

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Aloha, OR, United States of America

Robert Leyendecker