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With the wide-spread deployment of 3G services in most of the countries and continuous increasing demand of Smartphones and iPhones, past has experienced a substantial increase in cellular data traffic. Since the licensed spectrum over which the 3G services are delivered is costly and scarce, mobile operators have already started giving a serious thought about the alternative methods of satisfying the data needs of the mobile subscribers. 802.11 networks, which have complementary characteristics as compared to 3G network, have emerged as one of the primary alternative for it and many 3G - 802.11 Wireless Local Area Network (WLAN) interworking architectures have already been proposed.
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