Vertical Handoff Performance in WLAN Wireless Networks

Abstract- The WiFi handoff setup compares the data traffic received by different APs in the network. Since the initial stations of AP_0 are mobile ones, AP_0 receives data traffic only at the beginning and then at end of simulation when its stations start their tour and come back. Additionally, it receives data traffic when the stations started from south visit its section and get connected to it. In contrast to AP_0, AP_2 has stable stations, so the data traffic received by it does not drop to 0 like AP_0's traffic. As expected, its received data traffic doubles when the moving stations from west and south cross its section. AP_3 is visited by all moving stations at the same time. Hence, its received data traffic is tripled when this happens during simulation. Hence the throughput and delay for the wlan MS is obtained. The vertical handover setup consists of a gateway, application server providing voice service to the wimax BS and to the wlan router. Index Terms- AP, DCF, PCF, LAN, WLA