Performance evaluation of a CDMA protocol for voice and data integration in personal communication networks

Future wireless personal communication networks (PCN's) will require voice and data service integration on the radio Link. The multiaccess capability of the code-division multiple-access (CDMA) technique has been widely inves tigated in the recent literature. The aim of this paper is to propose a CDM A-based protocol for joint voice and data transmissions in PCN's, The perfo rmance of such a protocol has been derived by means of an analytical approa ch both in terms of voice packet dropping probability and mean data packet delay. Voice traffic has been modeled as having alternated talkspurts and s ilences, with generation of voice packets at constant rate during talkspurt s and no packet generation during silence gaps. A general arrival process i s assumed for the data traffic. However, numerical results are derived in t he case of a Poisson process. Simulation results are given to validate our analytical predictions. The main result derived here is that the proposed C DMA-based protocol efficiently handles both voice and data traffic In parti cular, it is shown that the performance of the voice subsystem is independe nt of the data traffic.