Date Added: Sep 2009
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, the authors focus on the method reducing the number of channels for the MS in handover process to scan. With the help of IEEE 802.21 Information Server (IS), a proper scanning order of channels is offered by the current AP.