Wireless LAN handoff module implementation to OPNET simulator and handoff performance analysis

To simulate handoff performance of IEEE 802.11b Wireless LAN, we added a handoff module to OPNET Modeler 9.0 which currently does not support handoff. In this paper, we analyze handoff procedures and IEEE 802.11 part of OPNET Modeler 9.0 in detail and explain the module we added. Using this simulator, we assessed performance such as delay and packet loss of WLAN during handoff. We used TCP and UDP traffic to analyze how applications are affected by their traffic types.