A new protocol for wireless voice communications-non-collision packet reservation multiple access

The packet reservation multiple access (PRMA) protocol has been proposed for cellular wireless voice communications in the literature. The study results show that the PRMA system has a stability problem in a heavy load condition. This problem is very similar to that of the ALOHA system. Hence, the PRMA system requires a congestion control mechanism to overcome the stability problem. Focusing on this problem, a modified version, which is referred to as non-collision PRMA, is proposed. By assigning a pair of dedicated control minislots in the call set-up phase for each terminal, the contention mechanism required for reservation in the PRMA protocol is replaced by an individual reservation procedure. As expected, packet collision never occurs. The study results also show that the overall performance of the NC-PRMA system is superior to that of the PRMA system.