Design of Cognitive Cycles in 5G Networks
Adding cognitive capabilities to the wireless networks makes it possible to leverage the control and management information used in the network operation to infer information about the local state and exploit it to improve the overall performance. This pa
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School of Engineering of Bilbao, University of the Basque Country (UPV/EHU), Alda. Urquijo S/N, 48012 Bilbao, Spain {bego.blanco,joseoscar.fajardo,fidel.liberal}@ehu.eus
Abstract. Adding cognitive capabilities to the wireless networks makes it possible to leverage the control and management information used in the network operation to infer information about the local state and exploit it to improve the overall performance. This paper deals with the combined use of centralized and distributed cognitive cycles integrated at different planes in 5G networks: an integrated data plane, a unified control plane and a cross-layer management plane. This context-aware cognitive schema acts on the decision making modules depending on the monitored environment to prevent failures, balance the virtual‐ ized execution and get a global enhancement in the provision of mobile services. The multi-level cognitive cycle supports the interaction between the edge and the cloud blurring the line that separates two paradigms: centralized radio operation and mobile edge services. Keywords: 5G · Cognitive cycle · Glocal · Blurring edge
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Introduction
The challenging requirements of 5G demand an evolution of the existing mobile network architecture. A defining characteristic of 4G networks is the coupling of data and control planes at the network level that interact with a separate service plane. This architecture forces to an adaptive operation: the service layer declares its requirements to the network layer; then the network accommodates the new service together with the other service requests and communicates the service plane the Quality of Service (QoS) levels that can be provided; finally, the service plane rearranges its requirements adapting them to the QoS offer. This iterative process is performed in isolation at both service and network planes without complete information of the other side, leading to non-optimal adaptation of services to network performance and of networks to service requirements. In order to overcome these drawbacks, an innovative feature of 5G networks against the previous architectures is the clear decoupling of data and control planes and the integration of service management elements in the control plane, while service instan‐ tiations are allocated in the data plane. In this context, Software Defined Networking (SDN) provides the abstraction tool needed to split control and data planes in data forwarding. The control plane is now centralized and has the complete picture of the network, even considering different access technologies. Eventually, this plane is capable of driving the different traffic flows along the most suitable paths and, thus, © IFIP International Federation for Information Processing 2016 Published by Springer International Publishing Switzerland 2016. All Rights Reserved L. Iliadis and I. Maglogiannis (Eds.): AIAI 2016, IFIP AICT 475, pp. 697–708, 2016. DOI: 10.1007/978-3-319-44944-9_62
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