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Multimedia traffic support over Wireless Local Area Networks (WLANs) witnessed a huge demand recently with market fusion toward personal smart digital devices. Bandwidth utilization, minimum delay and jitter are some of the critical requirements to provide real-time applications with good quality of service (QoS) level. In this paper, we evaluate the performance of the traditional IEEE 802.11 standard...
In the existing IEEE 802.11e standard, all VoIP sessions contend within the same prioritization Access Category (AC), despite potentially having very different, and varying one-way (M2E - Mouth to Ear) delays. In this paper we show how VoIP endpoints that are time synchronized can help optimize 802.11e EDCA in order to prioritize VoIP sessions that have relatively large M2E delays and thus distinguish...
TCP, the facto standard used in today's Internet, has been found to perform poorly in Mobile Ad Hoc Networks (MANETs). This is exacerbated by contention with increasing UDP-based high priority multimedia traffic and the class differentiation introduced in current QoS protocols, which results into TCP starvation and increased spurious timeouts. In this paper, we propose a cross-layer TCP enhancement...
With the emerging IEEE 802.11n standard, the WLAN is poised as a promising ubiquitous networking technology to support multimedia applications where providing QoS becomes imperative. However, the 802.11 WLAN is not designed to support delay sensitive traffic. This problem is magnified during a handover and typically results in excessive handover latency and packet loss. In addition, a 802.11 WLAN...
The wide deployment of IEEE 802.11 based wireless local area networks (WLANs), and increased interest in multimedia applications support in WLANs, have lead to the need to support real-time applications even when devices are roaming across WLAN access points (APs). This has lead to the development of the IEEE 802.11r fast roaming mechanism, in which a connection to a candidate AP is established before...
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