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Cellular digital packet data - advanced mobile phone standard network bandwidth contention

Cellular digital packet data (CDPD) networks borrow idle radio channels from advanced mobile phone standard (AMPS) cellular networks to send bursts of packet data traffic. Due to trunking inefficiencies inherent to AMPS systems, a relatively large amount of spare AMPS air link capacity can be found. In addition, the periods of time AMPS channels are idle are fairly long. Since AMPS calls have pre-emptive priority over CDPD, there will be periods of time when there is not an ample number of idle AMPS channels to satisfy the demands of CDPD. We study the durations of these contention periods as a function of AMPS parameters.