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A contention-tone-based wireless local area network (WLAN) protocol uses out-of-band signaling for contention resolution to achieve efficient medium access. It is shown that such a protocol can operate at near-optimal channel utilization in the medium access control (MAC) layer. This paper addresses the service differentiation design aspect of a contention-tone-based WLAN protocol. In particular,...
Bandwidth management in 802.11 wireless networks is becoming the main issue that should be overcome for IP multimedia services delivery such as IPTV, VoD, VoIP, etc. In this paper, we propose an adaptive bandwidth allocation based on adaptive transmission opportunity to overcome the guaranteed bandwidth issue. This scheme allows the video stream to take up the 802.11 channel proportionally to its...
Bandwidth reservation in wireless networks is a very challenging task due to the instability of radio channels, node mobility and lack of coordination between nodes. Reservation MAC protocols define a super-frame and allocate as lot to each real-time traffic source. However, the use of fixed length super-frame may result in bandwidth wasting, especially when heterogeneous classes of traffic with different...
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