Simulation of Reducing Re-association and Re-authentication Phases for Low Handoff Latency

摘要

WLANs have emerged very fast in both public and private areas during the recent years. They provide a non trivial replacement for the comph'cated and high cost wired LANs. However, the access points (APs) that build these WLANs do not have a very long coverage range. Consequently, many handoffs may occur as the mobile station is moving while accessing the network resources located at the distribution system side. Unfortunately, these handoffs can disturb the real time applications if they consumed a long time. This paper investigates the reduction of the handover in wireless network domain. We considered some mechanisms and techniques used to reduce handoff latency in wireless protocols. We developed a simulation tool in order to compare the data throughput with or without the re-association and the re-authentication phase. Experimental results show that the reduction of the re-association and the re-authentication phases enhances throughput and reduces the handoff latency.