C U plane splitting architectures and Inter RAT management for Radio Reconfigurable Systems
This paper presents an overview and innovative Energy Efficient inter radio access technique (RAT) management algorithms combined with control/user pl ane separation architectures dedicated to Wi Fi overlay networks for future cellular networks. For that pur pose, several system concepts issued from collaborative p rojects and standardization activities are first detailed i n the paper. Following this overview, innovative architectures derived from the ICT FP7 MiWEBA project are presented. These new multi RAT architectures focuse d on power efficiency for coordinated networks, are currently tuned to mm wave overlay networks within the framework of the project and for further standardization actions. Link adaptation metrics used to support decision in air interface selection are exposed and their integrati on in cross layer network architectures is proposed. Gain s of such inter RAT management by the use of link adapta tion metrics are illustrated using a dedicated power eff icient metric, highlighting benefits of multi RAT management over C/U plane separation schemes. Keywords C/U splitting, Inter RAT management; power efficiency; Link Adaptation selection; mm wave HetNet s.