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Radio access solutions are a primary consideration of the LTE deployment strategy, as it impacts the mobile operators' most valued asset, spectrum. As an equally important part of this equation, the multimedia core network will play a central role in enhancing mobility, service control, efficient use of network resources, and a seamless migration from 2G/3G to 4G. As a result, SAE calls for a transition to a "Flat," all-IP core network, called the Evolved Packet Core (EPC), that features a simplified architecture and open interfaces as defined by the 3GPP standards body.
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