• Wednesday, 14 June, 11:00-12:30, Room Theatre Big Stage
  • Session Chair: Didier Bourse (Nokia, France)



11:00 Architecture Modularisation for Next Generation Mobile Networks

Xueli An and Riccardo Trivisonno (Huawei Technologies, Germany); Hans Joachim Einsiedler (Deutsche Telekom, Berlin, Germany); Dirk V Hugo (Telekom Innovation Laboratories & Deutsche Telekom AG, Germany); Kay Haensge (Deutsche Telekom AG, Germany); Xiaofeng Huang (Orange, France); Qing Shen (Engineer at Orange France & Student at ParisTech University, France); Daniel Corujo (Instituto de Telecomunicações Aveiro & Universidade de Aveiro, Portugal); Kashif Mahmood (Telenor, Norway); Dirk Trossen (InterDigital Europe, United Kingdom (Great Britain)); Marco Liebsch (NEC Europe Ltd, Germany); Filipe Leitão (NEC Europe Ltd., Germany); Cao Phan and Frederic Klamm (BCOM, France)

The journey towards the deployment of next generation networks has recently accelerated, driven by the joint effort of research and standards organisations. Some key innovative design concepts have been recently consolidating and are going to characterise the notable discontinuity between 4G and 5G systems. Among those, Architecture Modularisation, discussed in this paper, is regarded by the authors as the essential design principle to build a flexible network architecture natively supporting Network Slicing. According to this concept, conventional monolithic network functions, often corresponding to physical network elements in the existing systems, are to be split into basic building blocks defined with the proper granularity, allowing the definition of different logical architectures, tailored to 5G use cases. In this paper, a modularisation methodology is presented, as a criteria to define the 'right' set of basic building blocks. Defined through this proposed methodology, the set of basic building blocks and the relating interfacing models are discussed. The paper concludes by proposing a candidate modular 5G network architecture, and comparing it with alternatives currently discussed within 3GPP standard working groups.


11:18 Experimental Evaluation of Hierarchical Control over Multi-Domain Wireless/Optical Networks

Josep Mangues-Bafalluy (Centre Tecnològic de Telecomunicacions de Catalunya (CTTC), Spain); José Núñez-Martínez (Centre Tecnologic de Telecomunicacions de Catalunya, Spain); Ramon Casellas (Centre Tecnològic de Telecomunicacions de Catalunya (CTTC/CERCA), Spain); Arturo Mayoral (CTTC/CERCA, Spain); Jorge Baranda (Centre Tecnològic de Telecomunicacions de Catalunya (CTTC/CERCA), Spain); Josep Xavier Salvat and Andres Garcia-Saavedra (NEC Labs Europe, Germany); Ricard Vilalta (CTTC/CERCA, Spain); Iñaki Pascual (CTTC, Spain); Xi Li (NEC, Germany); Ricardo Martinez and Raul Muñoz (Centre Tecnològic de Telecomunicacions de Catalunya (CTTC/CERCA), Spain)

5G-Crosshaul aims at reducing network costs by designing an integrated transport (fronthaul/backhaul) network able to fulfill 5G requirements. One of the main issues is that these transport networks will consist of heterogeneous technologies that need end-to-end orchestration. In this paper, we propose and evaluate a hierarchical controller for wireless/optical resources as seen from a resource management application (RMA). More specifically, we deploy a hierarchical 5G-Crosshaul Control Infrastructure (XCI) where child controllers deal with the specificities of each technology whilst the parent controller is in charge of offering RMA the appropriate abstraction level and an end-to-end view. To eventually understand the end-to-end behavior related with service setup, we evaluate each network segment (wireless and optical), each plane (application and control planes), and each layer of the hierarchy inside the XCI. In particular, we evaluate the aggregated path setup time (in the order of seconds) as well as the magnitude of each component (wireless domain contributes with tens of ms and multi-layer optical network with hundreds of ms per layer for a total in the order of seconds). Path restoration results reveal the importance of leveraging control of child controllers when requiring fast response to unexpected data plane events, since an important part of the setup delay observed is due to the RMA-parent-child controller interaction and sequential message handling.


11:36 Orchestration of Network Services Across Multiple Operators: The 5G Exchange Prototype

Andrea Sgambelluri (Scuola Superiore Sant'Anna, Italy); Francesco Tusa (University College London, United Kingdom (Great Britain)); Molka Gharbaoui (Scuola Superiore Sant'Anna, Italy); Elisa Maini (University College London, United Kingdom (Great Britain)); Laszlo Toka (Budapest University of Technology and Economics, Hungary); Jorge Martín Pérez (Universidad Carlos III de Madrid & IMDEA, Spain); Francesco Paolucci (Scuola Superiore Sant'Anna, Italy); Barbara Martini (CNIT, Italy); Wint Yi Poe (Huawei Technologies - European Research Center, Germany); Javier Melian (ATOS, Spain); Ajmal Muhammad (Royal Institute of Technology (KTH), Stockholm, Sweden); Aurora Ramos (Atos, Spain); Oscar González de Dios (Telefonica I+D, Spain); Balázs Sonkoly (Budapest University of Technology and Economics, Hungary); Paolo Monti (KTH Royal Institute of Technology, Sweden); Ishan Vaishnavi (Huawei Technologies Dusseldorf GmBH & European Research Centre, Germany); Carlos J. Bernardos (Universidad Carlos III de Madrid, Spain); Robert Szabo (Ericsson Hungary Ltd. & Budapest University of Technology and Economics, Hungary)

Future 5G networks will rely on the coordinated allocation of compute, storage, and networking resources in order to meet the functional requirements of 5G services as well as guaranteeing efficient usage of the network infrastructure. However, the 5G service provisioning paradigm will also require a unified infrastructure service market that integrates multiple operators and technologies. The 5G Exchange (5GEx) project, building heavily on the Software-Defined Network (SDN) and the Network Function Virtualization (NFV) functionalities, tries to overcome this market and technology fragmentation by designing, implementing, and testing a multi-domain orchestrator (MdO) prototype for fast and automated Network Service (NS) provisioning over multiple-technologies and spanning across multiple operators. This paper presents a first implementation of the 5GEx MdO prototype obtained by extending existing open source software tools at the disposal of the 5GEx partners. The main functions of the 5GEx MdO prototype are showcased by demonstrating how it is possible to create and deploy NSs in the context of a Slice as a Service (SlaaS) use-case, based on a multi-operator scenario. The 5GEx MdO prototype performance is experimentally evaluated running validation tests within the 5GEx sandbox. The overall time required for the NS deployment has been evaluated considering NSs deployed across two operators.


11:54 Reliable Capacity Provisioning for Distributed Cloud/Edge/Fog Computing Applications

Per-Olov Ostberg (Umeå University, Sweden); James Byrne (Dublin City University, Ireland); Paolo Casari (IMDEA Networks Institute, Spain); Philip Eardley (BT Group, United Kingdom (Great Britain)); Antonio Fernández Anta (IMDEA Networks Institute, Spain); Johan Forsman (Tieto AB, Sweden); John Kennedy (Intel Labs, Ireland); Thang Le Duc (Umeå University, Sweden); Manuel Noya Mariño (Linknovate Science SL, Spain); Radhika Loomba (Intel Labs, Spain); Miguel Angel López Peña (SATEC & SATEC, Spain); Jose Lopez Veiga (Linknovate Science SL, Spain); Theo Lynn (Dublin City University, Ireland); Vincenzo Mancuso (IMDEA Networks Institute, Spain); Sergej Svorobej (Dublin City University, Ireland); Anders Torneus (Tieto AB, Sweden); Stefan Wesner (Ulm University, Spain); Peter Willis (BT, United Kingdom (Great Britain)); Jörg Domaschka (Ulm University, Germany)

The REliable CApacity Provisioning and enhanced remediation for distributed cloud applications (RECAP) project states the objectives to advance cloud and edge computing technology, develop mechanisms for reliable capacity provisioning, and to make application placement, infrastructure management, and capacity provisioning autonomous, predictable, and optimized. This paper presents the RECAP vision for an integrated edge-cloud architecture, discusses the scientific foundation of the project, and outlines plans for toolsets for continuous data collection, application performance modeling, application and component auto-scaling and remediation, and deployment optimization. The paper also presents four use cases from complementing fields that will be used to showcase the advancements of RECAP.


12:12 On Implementing RRM/SON in Virtualized Multi-Tenant Small Cell Networks

Jordi Pérez-Romero (Universitat Politècnica de Catalunya (UPC), Spain); Oriol Sallent, Ramon Ferrús and Ramon Agustí (Universitat Politècnica de Catalunya, Spain)

This paper addresses the implementation of Radio Resource Management (RRM) and Self-Organizing Networks (SON) functions in virtualized multi-tenant small cell networks. In this context, the deployment and operation of RRM/SON functions as virtualized services facilitates the customization of the Radio Access Network (RAN) on a per-tenant basis. Specifically, this paper develops the architectural and functional framework for virtualizing RRM/SON functions, together with the illustration of some examples assessing the orders of magnitude of the requirements of the involved Virtual Network Functions (VNF).