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Currently, 3GPP is reinventing the telecom model of services in wireless Internet -a model that is not well suited to (1) meet the demands for new modes of personal mobile communication, enabled by wireless packet services and multimedia devices, or (2) the ability to deal with increasingly heterogeneous wireless infrastructure (one interpretation of 4G). This article characterizes the properties of service architectures in relation to the steps taken in successive generations of wirelessdoi:10.1109/98.972161 fatcat:5gyzex2ihvfw3gmlbyssonuthi