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In this paper we explore, via an extensive simulation study, the performance of a medium access control (MAC) protocol when integrating high-quality video, Web and MP3 data packet traffic over a wireless picocellular system of very high capacity, with errors and capture. Mobile terminals are considered to be high performance devices with extended storage capabilities which can act like cache memories streaming multimedia material. To the best of our knowledge, this is one of the first papers in the literature investigating the integration of H.264 video traffic with other types of traffic over wireless networks. Our results show that, despite the very bursty nature of the examined traffic and the burstiness of channel errors, the proposed scheme achieves very high throughput results while preserving the strict quality of service (QoS) requirements of each traffic type.