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114. (EP0919103) METHOD AND APPARATUS FOR SUPPORTING DATA TRANSMISSION OVER ANALOG AND DIGITAL CELLULAR TELEPHONE AIR INTERFACES

Pub. No.:    0919103    International Application No.:    97937235
Publication Date: Thu Jun 03 01:59:59 CEST 1999 International Filing Date: Thu Aug 14 01:59:59 CEST 1997
IPC: H04W 76/02
H04W 88/02
H04W 88/16
H04W 92/02
H04W 92/18
Applicants: ERICSSON INC
Inventors: MOON BILLY G
Title: METHOD AND APPARATUS FOR SUPPORTING DATA TRANSMISSION OVER ANALOG AND DIGITAL CELLULAR TELEPHONE AIR INTERFACES
Abstract:
Mobile stations include a data pump functionality for performing digital bit to waveform coding on a received digital data signal. The waveform coded output (analog data signal) is transmitted over the analog air interface using either an analog traffic channel or analog control channel. For transmission over the analog control channel, the data pump functionality multiplexes the wave form coded analog data signal with mobile station generated cellular system control signals. A data pump functionality is also provided at the other end of the air interface transmission to recover the digital data signal from the waveform coded analog data signal transmission. De-multiplexing of the received analog control channel transmission to extract the data signal is also performed, if necessary. For a data communication sent instead to the mobile station, the reverse operations are performed by the included data pump functionalities at either end of the analog air interface. Thus, the mobile station supports the carrying of IS-130/135 modem functionality on either an analog traffic channel or an analog control channel.