An integrated voice and data radio access system

A method for a digital mobile radio communication system to incorporate data transmission into full-duplex digital voice transmission channels is presented. In this method a voice terminal sends a short packet to a base station prior to sending a voice signal. When the base station receives the short packet or detects a collision between the short packet and data packet, it inhibits data transmission. Finding a pause period of voice signal transmission, the base station broadcasts a message to enable the data transmission. The results of computer simulation with voice data from real telephone conversations show that through the present system the almost maximum performance of the slotted ALOHA system is reached. Applying the proposed method to a 12-channel, 32-kb/s voice coding TDMA system, one can get a data transmission channel with average capacity of 270 kb/s on the voice communication system.<>