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The expected growth in Radio Access Technologies (RAT's) such as wireless technologies (802.11a, 802.11b, 802.15, 802.16, etc.) and cellular networks (GPRS, UMTS, HSDPA, LTE, etc.) requires efficient vertical handoff algorithm. Variety of Vertical Handoff Algorithms (VHA) has been proposed to help the user to select dynamically the Best Access Network (BAN) in terms of quality of service. This paper is to provide an optimized network selection decision that allows mobile users to choose the BAN with seamless manner and to exploit a minimum of criteria for all traffic classes namely: background conversational, interactive and streaming.
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