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In the IEEE 802.11 WLAN, a mobile station (MS) performs a handover whenever it moves out of range of one access point (AP). However, channel scanning which discovers the new available APs is the dominating factor in handover latency, accounting more than 90% of overall latency. In order to reduce such a scanning latency, we focus on the method reducing the number of channels for the MS in handover...
For the last decade, Voice Over IP (VoIP) has been a great concern leading to consider it as the ldquokilling applicationrdquo. Deploying such applications in the Wireless Local Area Networks (WLAN) is still in progress, and further investigations are needed. Unlike wired networks, wireless networks such as WLAN, have their own characteristics, which introduce many challenges that prohibit the support...
IEEE 802.11 based wireless networks are widely deployed in densely populated areas such as university campuses, airports, offices, cafeterias, etc. Their popularity is rising because of their low cost and high bandwidth except that they cover small coverage areas. In order to cover large areas several access points (AP) are required, which makes it disruptive technology. During roaming, the mobile...
This contribution addresses the case when live packet-switched video is used to enrich circuit-switched speech calls in mobile telephony. Circuit-switched and packet-switched transmissions generally operate on completely different transmission paths resulting in different QoS in terms of delay and loss rates. In this case, video and audio data recorded at the same time are not multiplexed together...
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