SPEED EFFECT ON THE PERFORMANCE OF VERTICAL HANDOVER IN WIFI-3G NETWORK

摘要

Mobile communication systems experienced high technical revolution. Nowadays, smart mobile devices have advancedcomputing aspects. In addition, they are provided with multiple network interfaces, wifi and 3G. Traffic redirection between thesenetworks is addressed by the vertical handover process. Recently, vertical handover enhanced by the IEEE802.21 standards whichenables seamless mobility and interworking between most of the heterogeneous wireless access networks [2]. A comparativeperformance study is done in this paper for the integration between WiFi and UMTS networks by taking advantage of theIEEE802.21 standard. The factors that affect the vertical handover process in this integration were studied such as the mobilespeed, and the application bitrate. Selecting five mobile node speeds 5,10,25,50,60 km/h whereas application bitrate is 64 kb/s and3840 kb/s.