Poster Session 1

Enabling tecnologies and solutions

Tuesday, 19 June 2018, 14:00-14:30, Foyer 2


Data Transformation Model for the Fault Management of Multi-tenant Networks

Sihem Cherrared (University of Rennes 1 & Orange Labs and INRIA, France); Sofiane Imadali (Orange Labs & Orange, France); Eric Fabre (IRISA, France); Gregor Goessler (INRIA, France)
The fault management of programmable multitenant networks introduces a number of issues including the data ambiguity and consistency, dynamic network topology and multi-tenant fault isolation. In this paper, we propose a data transformation model based on open source tools to tackle those issues for an efficient diagnosis process.


Design of Water Level Measurement Wireless Node for Remote Areas

Minja Miladinović (Jožef Stefan International Postgraduate School, Slovenia); Andrej Hrovat (Jožef Stefan Institute, Slovenia); Tomaz Javornik (Jozef Stefan Institute, Slovenia)
In this poster, a design of digital water level wireless node for remote areas with poor commercial wireless network coverage is presented. The Automatic Packet Reporting System (APRS) is applied to obtain good radio coverage at remote areas. Solar panel is applied to generate necessary electrical energy for wireless node operation, while the excess of energy is stored in a Li-Po battery. The Arduino Pro Mini is applied as a microcontroller for supporting APRS communications and ultrasonic proximity sensor. A challenges of system design and the preliminary results obtain from the wireless sensor node operation is discussed.

Fade Duration Analysis of Ka- And Q-band Satellite Beacon Measurements in Ljubljana

Arsim Kelmendi and Andrej Vilhar (Jozef Stefan Institute, Slovenia)
Fade duration is an important dynamic aspect of signal attenuation, corresponding to the time length during which a fixed threshold is exceeded. Accurate estimation of fade duration statistical behaviour is essential for an efficient design of a communication system. The paper focuses on fade duration statistical analyses of Ka- and Q-band measurements carried out in a satellite propagation experiment in Ljubljana. The analyses are made on one year of collected RSSI measurements of 19.7 GHz and 39.4 GHz beacon signals, transmitted from the Alphasat satellite. The results are compared to the state-of-the-art prediction models of fade duration distribution. The comparison shows that the accuracy of the existing prediction models may be improved.

A Beneficial Use of Crossed-Slot in Dynamic Time-division Duplexing

Hyun Geon Kim and Ho-Shin Cho (Kyungpook National University, Korea)
In this paper, we show that a crossed time slot shared by two neighboring cells with opposite transmission directions could be beneficial in terms of the signal-to- interference ratio (SIR) depending on the location of the user equipment (UE). Furthermore, the beneficial region of UE location is mathematically derived.

Coded Caching for Optimal Content Delivery in 5G: The Case of Low Cache Sizes

Seyed Pooya Shariatpanahi (Institute for Research in Fundamental Sciences (IPM), Iran); Babak Hossein Khalaj (Sharif University of Technology, Iran)
We consider the role of caching in wireless content delivery scenarios for 5G mobile networks. The setup we consider is downlink of a single cell where a multi-antenna base station delivers content to multiple cache-enabled users. Focusing on the low cache size regime, we propose a novel coded caching scheme delivering contents to users with different requests. Furthermore, we provide an information-theoretic optimality proof for our proposed scheme, and compare its performance with the uncoded solution.

Multi-RAT Experimentation Below 6 GHz

Nicola Michailow, Clemens Felber and Vincent Kotzsch (National Instruments, Germany)
Driven by novel 5G use cases like URLLC and mMTC, as well as the strife for higher data rates in eMBB, researchers and engineers are in need of prototyping platforms to evaluate new concepts and technologies for future wireless communication systems. In context of the H2020 project “ORCA”, a platform for multi-RAT experimentation below 6 GHz is currently being developed. The goal is to enable experiments with heterogeneous RAT including LTE, 802.11 and 5G. This will lead to a better understanding of the practical trade-offs when dealing with existing and new technologies. Throughout the duration of the project, the ORCA facilities are being made accessible to the research community through several open calls for extensions and open calls for experiments. In this poster, we give an overview of the platform architecture, discuss different options for RAT interworking and present a unified L1-L2 API

Optimal Optical Filter Design for Optical Wireless Communications

Kang-Il Ahn (Mando Global R&D Center, Korea); Jae Kyun Kwon (Yeungnam University, Korea)
This paper presents an optimal optical filter for use in optical wireless communications that employ intensity modulation, which maximizes the signal-to-noise ratio (SNR) considering wavelength and time characteristics of the signal and noise. A method to deal with negative filter coefficients is also presented.

Grant-Free Transmissions for Ultra-Reliable and Low Latency Uplink Communications

Bikramjit Singh and Olav Tirkkonen (Aalto University, Finland); Zexian Li and Mikko Uusitalo (Nokia Bell Labs, Finland)
Grant-based uplink transmissions may allow reliable access for ultra-reliable and low latency communications. However, if the first transmission fails, there is not enough room for many subsequent grant-based re-transmissions, considering tight latency constraint of 1 ms even with 5G New Radio mini-slot numerology. To enable low latency access, grant-free uplink data transmissions can be targeted. It utilizes multi-channel slotted ALOHA (contention) based transmissions in time-frequency resource. This eliminates signaling related to scheduling request and resource allocation, and significant time is saved. However, reliability is undermined due to random collisions. To support reliability for low latency grant-free transmissions, we consider various design enhancements using, e.g., repeated transmissions, feedback control, combinations with grant-based access depending on the traffic sporadicity and network’s implementations. The usability of the proposed protocols are analyzed with a frame structure for 5G cellular systems. Results with different protocols are compared with default multi-channel slotted ALOHA access and grant-based access schemes.

WiFi-ZigBee Coordination Using Spectrum Sensing and Edge Computing

Nenad Milosevic (University of Nis & Faculty of Electronic Enginnering, Serbia); Valentina Nejkovic (University of Nis, Serbia); Zorica Nikolic (University of Nis & Faculty of Electronic Engineering, Serbia); Milorad Tosic (University of Nis, Serbia)
WiFi and ZigBee networks are widely used today, but they operate in the same 2.4 GHz frequency band and cause interference to each other. This paper considers coordinated spectrum access between WiFi and ZigBee devices, as a solution to the problem of the WiFi-ZigBee interference. The coordination is based on the spectrum sensing and employs semantic technologies to reason about free and occupied portions of the spectrum. It also targets edge computing as a deployment approach to reduce the amount of data sent to the coordination server. The analysis shows that a significant performance improvement may be achieved by the proposed coordination mechanism.

Internet of Radio-Light – H2020 Project 1St Year Achievements

John Cosmas (Brunel University, United Kingdom (Great Britain)); Adam Kapovits (Eurescom GmbH, Germany)
This paper presents the major innovation achievements of the EU Horizon 2020 project Internet of Radio-Light in its first year. The achievements have been categorized into (1) Overall Architecture, (2) Remote Radio-Light Head Architecture, (3) Radio Access Network Architecture, (4) NFV / SDN Architecture, (5) Lighting System Architecture. It then identifies the planned demonstrations for the final year of the project and expected key performance indicators.

Practical Implementation of Cloud-RAN: FALCON’s Approach

Valentin Rakovic and Daniel Denkovski (Ss. Cyril and Methodius University in Skopje, Macedonia, the former Yugoslav Republic of); Liljana Gavrilovska (Ss Cyril and Methodius University – Skopje, Macedonia, the former Yugoslav Republic of)
Conventional wireless systems, are exploiting static configuration and deployment, being inefficient in handling any spatio-temporal fluctuations of the underlying user demands. Cloud-RAN (C-RAN) is a novel concept based on virtualization and SDR technology that can efficiently address the problems of legacy networks. However, the practical implementation of C-RAN introduces a plethora of open issues that have to be solved before its commercial deployment. C-RAN can leverage agile physical and network layer adaptability. This work presents the C-RAN designed laboratory platform capable of efficient virtualization of different types of wireless technologies. The designed platform utilizes commercial and open-source virtualization solutions, such as OpenStack and Docker, and identifies and develops optimal mechanisms for efficient and reliable C-RAN deployment.

Real-Time Connectivity Capabilities of Cellular Network for Smart Grid Applications

Miha Smolnikar and Marko Mihelin (ComSensus, Slovenia); German Corrales Madueno (Keysight Technologies, Denmark)
With the transition towards 5G, cellular networks are evolving into ubiquitous infrastructure for information acquisition, communication, storage and processing, suitable also for the provision of mission-critical and real-time applications such as envisioned in Smart Grids. This work presents the results of design, prototyping and assessment of Machine Type Communications for distributed monitoring and control tasks in the distribution segment of the electrical grid. In particular, the performance requirements of Wide Area Monitoring System and Transactive Energy applications are evaluated through experimentation with different technologies and under varying operating conditions.

Pilot Contamination in Massive MIMO: Virtual Angular Information Aided Channel Estimation

Andrea P Guevara (KU Leuven, Belgium)
In a Massive MIMO (Multiple Input Multiple Output) system the base station needs accurate channel state information (CSI). However, the accuracy of CSI estimation is highly impacted by pilot contamination. Different channel estimation solutions mitigate pilot contamination by presuming clean and not contaminated channel covariance matrices. Nevertheless, obtaining such covariance matrix or statistics about the real CSI is difficult in practice under pilot contamination conditions. In this paper, we propose a method using virtual angular transformation (VAT) to separate contaminated channels, by exploiting location-dependent channel statistics in combination with minimum mean square error (MMSE) channel estimation. When the users are in different locations our results show 10dB reduction of the channel estimation error compared to zero-forcing.


A Comparison of Shaping Techniques for Wireless Backhaul Channel

Najeeb Ul Hassan (Huawei Duesseldorf Technologies GmbH, Germany); Wen Xu (Huawei Technologies Duesseldorf GmbH & – European Research Center (ERC), Germany); Anastasios Kakkavas (Huawei Technologies Duesseldorf GmbH, Munich Research Center & Technische Universität München, Germany)
Transmitting uniformly distributed symbols result in a gap to the Shannon capacity, known as shaping loss. This loss can be reduced by employing shaping schemes that modifies distribution of transmit symbols from uniform to non-uniform. We consider probabilistic and geometric schemes on wireless backhaul channel. In addition to soft decision decoding of LDPC codes, a low complexity hard decision decoding is also considered. The results show that significant error performance gains can be achieved by using probabilistic shaping even with hard decision decoding.

Method to Design UF-OFDM Filter and Its Analysis

Hirofumi Tsuda (Kyoto University & Graduate School of Informatics, Japan); Ken Umeno (Kyoto University, Japan)
In OFDM systems, there are two main problems. One of them is that OFDM signals have high Peak-to-Average Power Ratio (PAPR). The other problem is that OFDM signals have large side-lobes. In particular, to reduce side-lobes, Universal-Filtered OFDM (UF-OFDM) systems have been proposed. In this paper, we show criteria for designing filters for UF-OFDM systems and a method to obtain the filter as a solution of an optimization problem. Our filters have smaller side-lobes and lower Bit Error Rate than one of the Dolph-Chebyshev filter. Also, under some conditions, PAPR are evaluated.

Architecture and Enablers of 5G V2X Network Slice for Reliable and Low-latency Communications

Apostolos Kousaridas (Huawei Technologies, Germany); Panagiotis Spapis (European Research Center Huawei Technologies, Duesseldorf GmbH, Greece); Laurent Gallo and Bernadette Villeforceix (Orange Labs Networks, France); YunXi Li and Wanlu Sun (Ericsson Research, Sweden); Massimo Condoluci (Ericsson Research, Sweden & King’s College London, United Kingdom (Great Britain)); Liang Hu (Ericsson Research, Sweden); Toktam Mahmoodi (King’s College London, United Kingdom (Great Britain)); Ricard Vilalta (CTTC/CERCA, Spain); Markus Dillinger (Huawei Technologies Duesseldorf GmbH, Germany)
This paper presents a set of architectural solutions for the connected car, by introducing a 5G V2X architecture being able to work in multi-operator and multi-OEM scenarios. 5G technologies will enable vehicles to be connected to the networks and also to be able to communicate with each other with ultra-high reliability and very low latency. Leveraging such kind of connectivity will enable disruptive new applications that will allow improving driving efficiency and boosting road safety. Objectives, use cases and results from the EC-funded 5GPPP 5GCAR project are presented, including a set of technology components such as local end-to-end data paths, multi-link and multi-RAT traffic flow and QoS management, location-aware scheduling techniques, and 5G V2X Network Slicing

Distributed Ledger Technology-Based Ownership Management in Social IoT

Jernej Mihelj (Universitiy of Ljubljana, Faculty of Electrical Engineering, Slovenia); Andrej Kos (University of Ljubljana, Slovenia); Urban Sedlar (University of Ljubljana, Faculty of Electrical Engineering, Slovenia)
The number of devices in Internet of Things (IoT) is growing rapidly. The system openness and heterogeneity of devices raise many issues in provisioning and management, especially when people (the owners and users) are added to the mix. Extending the IoT to human-centered networks adds additional management complexity, which is partly addressed by the Social IoT (SIoT) paradigm that aims to provide a solution for self-management and relationship dynamics in the device-only IoT. However, in such Cyber-Physical-Social Systems (CPSS), Social IoT faces some limitations. In this article we propose a novel distributed ledger technology-based framework for human-centered physical objects ownership management in CPSS. The framework mechanics are presented and critically discussed.

Wireless Information and Energy Transfer for Outdoor to Indoor Multicarrier SUDAS

Syed Adil Abbas Kazmi and Sinem Coleri Ergen (Koc University, Turkey)
We study the resource allocation in an amplify and forward (AF) relay assisted orthogonal frequency division multiple access (OFDMA) system employing a shared user equipment (UE)-side distributed antenna (SUDAS). It simultaneously utilizes both unlicensed (in the UE to AF relay link) and licensed frequency bands (AF relay to BS link), hence exploiting the advantages of both MIMO over licensed band with its favorable propagation conditions and mmW band with larger bandwidths, to improve achievable rate of the future 5G communication systems. The users in the system have no energy of their own, so for transmitting information to the base station in the uplink, they first need to harvest energy from the SUDACs (shared UE-side distributed antenna components) in the downlink. For this purpose, we present a time switching based MIMO-OFDMA (TS) protocol. To explore the system performance limits, we formulate a non-convex optimization problem to maximize the end-to-end achievable information rate of the system. Due to the non-convexity of the problem, we propose a polynomial time algorithm based on the separation of energy harvesting and information transmission problems and optimization of the interactive time variable. Simulation results illustrate that the proposed system achieves a significant performance gain over the conventional systems exploiting only licensed bands. Moreover, the effect of the number of SUDACs (relays) and number of subcarriers on the system performance are also investigated.


EuWireless: Design of a pan-European Mobile Network Operator for Research

Pedro Merino (University of Malaga, Spain); Laura Panizo (Universidad de Malaga, Spain); Almudena Diaz Zayas (University of Malaga, Spain); Janie Baños (AT4 Wireless, Spain); Oscar Castañeda (DEKRA, Spain); Atso Hekkala (VTT Technical Research Centre of Finland, Finland); Kyosti Rautiola (VTT, Spain); Jarno E. Pinola (VTT Technical Research Centre of Finland, Finland); Adam Flizikowski (IS-Wireless, Spain); Slawomir Pietrzyk (IS-Wireless, Poland); Jos Dumortier (TimeLex, Spain); Lars Fischer (NORDUnet, Denmark); Jerry Sobieski (NORDUnet, USA)
The objective of the EuWireless project is to design the first pan-European infrastructure to support research in mobile communication networks. The output of the project will be a complete design report addressing the technical solutions, the regulatory aspects, the business model, and the roadmap for implementation of the proposed infrastructure, as well as prototypes that confirm its feasibility. EuWireless is funded by the European Commission H2020 program1. This paper presents an overview of the EuWireless project, the enabling technologies and use cases that will be addressed.

Enabling Advanced 5G Component Validations and Optimizations by Means of System Level Simulations Platform, Abstractions, Models, Results and Further Challenges

Andreas Georgakopoulos, Evangelos Kosmatos and Ioannis-Prodromos Belikaidis (WINGS ICT Solutions, Greece); Martin Kurras and Lars Thiele (Fraunhofer Heinrich Hertz Institute, Germany); Panagiotis Demestichas (University of Piraeus, Greece)
System level simulations in the 5G era, consider demanding use cases with high load and very limited latency in order to cover services such as eMBB, mMTC and URLLC. The system-level simulation platform is a discrete event simulation environment for the simulation of heterogeneous networks which is extended with new features to support the new functionalities of 5G. Finally, sample results include calibration curves compared to 3GPP as well as indicative evaluations.