Panagiotis Spapis

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The design of an efficient radio access selection mechanism for 5G cellular networks is of paramount importance. Several proposals exist in the literature, but up to now the deployed systems are still using simple mechanisms mainly related to the evaluation of the RSS to make a handover decision. However, this is an inadequate solution for 5G networks. In(More)
Over the past years the mobile traffic demands and the number of the connected devices have been constantly increasing thus indicating that in the near future the current spectrum usage models may fail to cover user needs. At the same time, spectrum scarcity over several Mobile Network Operators (MNOs) leads to inefficient spectrum usage. Co-primary(More)
One of the objectives of METIS-II project is to facilitate discussion on scenarios, use cases, KPIs and requirements for 5G, building upon the comprehensive work conducted in the METIS-I project and taking the work of other European projects as well as other bodies such as ITU-R, NGMN, etc. into account. This paper analyses the landscape of 5G use cases and(More)
Network slicing addresses the deployment of multiple logical networks as independent business operations on a common physical infrastructure. The concept has initially been proposed for the 5<sup>th</sup> Generation (5G) core network (CN) however, it has not been investigated yet what network slicing would represent to the design of the 5G radio access(More)
Autonomic network management systems will operate in a volatile network environment; thus they should be able to continuously adapt their decision making mechanism through learning from the behavior of the communication system. In this paper, a novel learning scheme is proposed based on the network-wide collected performance experience, targeting the(More)
Admission control aims to compensate for the inability of slowchanging network configurations to react rapidly enough to load fluctuations. Even though many admission control approaches exist, most of them suffer from the fact that they are based on some very rigid assumptions about the perflow and aggregate underlying traffic models, requiring manual(More)
Future Internet network management systems are expected to incorporate self-x capabilities in order to tackle the increased management needs that cannot be addressed through human intervention. Towards this end, Self-NET developed a self-management framework based on the introduction of cognitive capabilities in network elements. In this paper, the(More)