The University of British Columbia

Packet-switching will be employed in third generation cellular systems. In this paper, the performances of fixed and dynamic channel assignment (FCA and DCA) schemes used in conjunction with packet reservation multiple access (PRMA) protocols in a packet-switched voice cellular system are studied. A comparison of FCA with PRMA and FCA with PRMA++ protocols is made. Two measurement-based protocols, DCA/PRMA and DCA/PRMA++, are considered to cope with the highly unpredictable and varying microcellular environment. A channel reassignment: technique is proposed which can be used to reduce the number of packets lost due to out-of-cell interference during speech talkspurts. It is shown that channel reassignment can improve the performance significantly. With reassignment, DCA outperforms FCA.