Non-collision packet reservation multiple access with random transmission to idle slot

The non-collision packet reservation multiple access (NC-PRMA) protocol has been proposed for wireless voice communications. In that protocol, although it can avoid any collision by using a control minislot, the terminal which generates its talkspurt in the current frame has to wait till the next frame to transmit a request minipacket to obtain reservation. We propose the NC-PRMA with random transmission to idle slot to reduce the mean access delay. We evaluate the mean access delay and the voice packet dropping probability by the theoretical analysis. We also evaluate the total throughput by the computer simulation. It is shown that the proposed scheme attains lower mean access delay than conventional NC-PRMA.