• Tuesday, 13 June, 11:30-13:00, Room Theatre Attic Studio
  • Session Chair: Tao Chen (VTT Technical Research Centre of Finland LTD, Finland)



11:30 Dynamic Slicing for Mobile Network Infrastructures: Challenges, Opportunities and Business Aspects

Engin Zeydan (Türk Telekom Labs, Turkey); Omer Narmanlioglu (P. I. Works & Ozyegin University, Turkey)

Software-Defined Networking (SDN) paradigm provides many features including hardware abstraction, programmable networking and centralized policy control to networks. In the next generation mobile networks, one of the main benefits that can be used along with these features is core/backhaul SDN-based network virtualization. In this article, we propose a novel shared SDN-based Evolved Packet System (EPS) architecture where a network virtualization controller is utilized to ensure dynamic slicing and sharing of mobile core and backhaul networks among several Mobile Operators (MOs). In the proposed architecture, infrastructure owner that owns the SDN-based network infrastructure can exploit network virtualization benefits of SDN by formulating an appropriate evolved NodeBs (eNodeBs) assignment mechanism among MOs as a consequence of core/backhaul network virtualization. This mechanism uses various scheduling algorithms based on the instantaneous traffic demands of MOs while guaranteeing their own quality-of-service (QoS) requirements. In respect to this, we investigate the performance of shared architecture with the use of both QoS-aware and QoS-unaware schedulers through Monte Carlo simulations and compare them with traditional EPS of Long Term Evolution (LTE) networks in terms of fairness, capacity and satisfied-MO-ratio and the challenges, opportunities and business perspectives of our proposed architecture are addressed as well.


11:48 The 5D Approach to Control and Manage Smart Spaces

Seppo Hätönen, Julien Mineraud and Ashwin Rao (University of Helsinki, Finland); Hannu Flinck (Nokia Bell Labs, Finland); Sasu Tarkoma (University of Helsinki, Finland)

Our homes, offices, and other spaces are expected to evolve into smart spaces served by devices having varying requirements and capabilities. To efficiently control and manage these devices, their controllers needs to be built using the correct abstraction for the devices. In this paper, we present an abstraction for the devices in smart spaces, and we use this abstraction to present a 5D---deploy, discovery, decision, dissemination, and data---approach to control and manage smart spaces. We also discuss three approaches to design controllers for smart spaces, and highlight how controllers can leverage recent research in distributed systems. We believe that our abstraction for devices, our 5D approach, and our approaches to design controllers are helpful for turning our spaces to smart spaces.


12:06 Cross-Domain Discovery of Communication Peers Identity Mapping and Discovery Services (IMaDS)

Ingo Friese (Deutsche Telekom Laboratories, Germany); Rebecca Copeland (Telecom SudParis (TSP) & Core Viewpoint Limited, United Kingdom (Great Britain)); Sebastian Göndör (Telekom Innovation Laboratories & TU Berlin, Germany); Felix Beierle (Technische Universität Berlin, Germany); Axel Küpper (TU Berlin, Germany); Ricardo Lopes Pereira (INESC-ID/Instituto Superior Técnico, Portugal); Jean-Michel Crom (Orange Labs, France)

The upcoming WebRTC-based browser-to-browser communication services present new challenges for user discovery in peer-to-peer mode. Even more so, if we wish to enable different web communication services to interact. This paper presents Identity Mapping and Discovery Service (IMaDS), a global, scalable, service independent discovery service that enables users of web-based peer-to-peer applications to discover other users whom to communicate with. It also provides reachability and presence information. For that, user identities need to be mapped to any compatible service identity as well as to a globally unique, service-independent identity. This mapping and discovery process is suitable for multiple identifier formats and personal identifying properties, but it supports user-determined privacy options. IMaDS operates across different service domains dynamically, using context information. Users and devices have profiles containing context and other specific information that can be discovered by a search engine. The search results reveal the user's allocated globally unique identifier (GUID), which is then resolved to a list of the users service domains identities, using a DHT-based directory service. Service-specific directories allow tracking of active endpoints, where users are currently logged on and can be contacted.


12:24 Challenges and Opportunities for Designing Tactile Codecs from Audio Codecs

Xun Liu, Mischa Dohler and Toktam Mahmoodi (King's College London, United Kingdom (Great Britain)); Liu Hongbin (King's College, University of London, United Kingdom (Great Britain))

Haptic communications allows physical interaction over long distances and greatly complements conventional means of communications, such as audio and video. However, whilst standardized codecs for video and audio are well established, there is a lack of standardized codecs for haptics. This causes vendor lock-in and thereby greatly limits scalability, increases cost and prevents advanced usage scenarios with multi-sensors/actuators and multi-users. The aim of this paper is to introduce a new approach for understanding and encoding tactile signals, i.e. the sense of touch, among haptic interactions. Inspired by various audio codecs, we develop a similar methodology for tactile codecs. Notably, we demonstrate that tactile and audio signals are similar in both time and frequency domains, thereby allowing audio coding techniques to be adapted to tactile codecs with appropriate adjustments. We also present the differences between audio and tactile signals that should be considered in future designs. Moreover, in order to evaluate the performance of a tactile codec, we propose a potential direction of designing an objective quality metric which complements haptic mean opinion scores (h-MOS). This, we hope, will open the door for designing and assessing tactile codecs.


12:42 SDN/NFV Based Caching Solution for Future Mobile Network (5G)

Yaning Liu (JCP-Connect, France); Jean-Charles Point (JCP-Connect SAS, France); Konstantinos V. Katsaros (Intracom S.A. Telecom Solutions, Greece); Vasileios Glykantzis (Intracom Telecom, Greece); Muhammad Shuaib Siddiqui and Eduard Escalona (Fundació i2CAT, Internet i Innovació Digital a Catalunya, Spain)

Caching content locally at the edge of the network and managing these caches by SDN/NFV based technologies are able to satisfy increasing data traffic demand in 5G. The virtualization of caching functionalities allows network operators to deploy caching services with advanced features like flexibility, dynamicity and auto-scalability, and provide caching services to service providers or virtualized network operators over the same common infrastructure. The caching management system provides two levels of operations: i) at the global level managed by the Infrastructure Provider applying to all the tenants or virtualized network operators; or ii) at the tenant-specific level managed by the specific tenants. Our caching solution opens an entirely new space of business opportunities for network operators, service providers and content providers.