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Various realtime multimedia applications will be provided in next generation Internet where IEEE 802.11e wireless LAN will be widely used as broadband access networks. The characteristics of the wireless channels in IEEE 802.11 (i.e., fluctuating bandwidth and large error rate), however, impose challenging problems in the efficient QoS-guaranteed realtime multimedia communications with strict QoS requirements (i.e., bandwidth, delay, jitter, and packet loss/error rate). In this paper we propose management schemes of IEEE 802.11e wireless LAN (WLAN) for realtime QoS-guaranteed teleconference services with differentiated H.264 video transmission. In the proposed scheme, the IEEE 802.11e Wireless LAN is managed to transmit I, P and B slices from H.264 encoder using different channels of both HCF controlled channel access (HCCA) and enhanced distributed channel access (EDCA). We compare several different mapping scenarios, and analyze the QoS provisioning performance for realtime multimedia teleconference service.

Management of IEEE 802.11e Wireless LAN for Realtime QoS-Guaranteed Teleconference Service with Differentiated H.264 Video Transmission