In this paper we explore, via an extensive simulation study, the performance of a Medium Access Control (MAC) protocol when integrating video, WAP and MP3 data packet traffic over a wireless picocellular system of very high capacity, with errors. Mobile terminals are considered to be high performance devices with extended storage capabilities which can act like cache memories streaming multimedia material. ?ur scheme achieves high aggregate channel throughput in all cases of traffic load, despite the very bursty nature of the examined traffic and the introduction of errors in the system.