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In light of the increasing acceptance of the notion of Next Generation Networks (NGN), which will result from the convergence of the fixed and mobile telecommunications, Internet, and entertainment sectors, there is a need for the realization of next-generation service delivery platforms to allow seamless and adaptive provisioning of multimedia information and communication services to mobile users. This means that in such an NGN environment different end systems, access networks, and servicedoi:10.1109/mwc.2004.1351681 fatcat:kdp6ciugondsfpqyps5jhszkti