Nowadays, we have witnessed an exponential growth of the traffic generated by users in mobile communications networks. This need for a greater capacity in mobile networks raises problems for operators, because the demand for network capacity is not always accompanied by the evolution of the available technologies. This represents problems in access networks that result in failures in the customer service and losses to the operator. It is quite important that the service is the best possible for both client and the operator: preventing and resolving network congestion is a common interest. The quality of service is also an important point of great concern, that requires to evaluate the service provided in order to achieve the best satisfaction from the user. However, many challenges still need to be surpassed on current mobile networks.
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