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Recently, a new network architecture with split control-plane and user-plane has been proposed and gained a lot of momentum in the standardisation of Long Term Evolution (LTE) Release 12. In this new network architecture, the control-plane, which transmits system information and handles user connectivity, and the user-plane, which manages user data, are split and no longer transmitted necessarily...
Recently, network architectures based on high-density cells with reduced transmit power have been claimed as a promising solution for energy efficiency enhancement. Cell size reduction down to the range 10-50 m is the paradigm of femtocells, based on low-cost, user-deployed in-house base stations connected to the operator's core network through DSL links. However, in dense urban scenarios, radio interference...
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