Building LTE networks need inputs based on evolution

FiberHome Technologies
20 Mar 2013

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With the continuous development of the mobile internet, internet of things, cloud computing and other new technologies, network operators are taking to broadband, IP, and convergence. Operators also see the need to gradually raise the level of network intelligence and pursue a path of evolution toward 4G LTE.

Throughout 2012, major operators -- whether in Europe, the Americas, Asia-Pacific or Africa – took firm steps in developing LTE by installing such networks.

The evolution of the network is first reflected in its architecture and LTE network architecture has seen larger changes compared with 2G/3G networks. This is seen, for example in the all-IP in the network as the core network canceled the circuit switch.

All-IP EPC supports unified access of a variety of technology in 3GPP and non-3GPP to realize the fixed mobile convergence, as well as flexibility to support VoIP and IMS-based multimedia services.

LTE evolution also flattened the network architecture. The previously defined RNC was canceled and the eNB directly accessed EPC to reduce the time delay that the user felt, improving the mobile communication experience.

Further, LTE introduced two new interfaces. One is X2, which is distributed interface between adjacent eNB, mainly used for user mobility management. The other is S1 flex, which is a dynamic interface connecting eNB and EPC, mainly used to improve network redundancy and load balancing.

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