Data transmission systems based on the IEEE802.11 standard, universally known as WiFi wirelesscommunications, is strengthening its already dominant positionas the powerhorse of wireless Internet in homes and public hotspots due to the new IEEE 802.11n standard, capable ofdelivering up to 450 Mbps. 802.11 standard was initiallydesigned without provision of QoS guarantees. Eventually theneed to include voice and video urged the development of the802.11e standard, which provides a proficient level of QoS forreal time applications. With the two former additions IEEE802.11 systems are poised to join the family of 4G wirelessnetworks, comprised by LTE (Long Term Evolution) andWiMax. However, still remains a challenge to overcome in thetransfer of a session from one cell to another. Considering thatthe inter-cell handover consumes around 300 ms, it becomesunsuitable for real-time applications like Voice over IP (150 msmaximum delay) and video (200-400 ms).A proposals to reduce the IEEE 802.11 system handoff time ispresented. A predictive method using fuzzy logic is developed inorder to adapt to the requirements of constraining timeapplications like Voice over IP.
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