Can Mobile Workforce Revolutionize Country-Scale Crowdsourcing?

  • Acer U.
  • Forlivesi C.
  • Godon M.
  • Kawsar F.
  • Van Den Broeck M.

Traditional urban-scale crowdsourcing approaches suffer from three caveats - lack of complete spatiotemporal coverage, lack of accurate information and lack of sustained engagement of crowd workers. We argue that mobile workforces roaming around the city (and the larger country) can overcome all three caveats if their daily activity routines embed ...

Access and metro network convergence for flexible end to end networks [invited]

  • A. Arbelaez
  • A. Di Giglio
  • Achouche M.
  • Bonk R.
  • C. Raack
  • G. Talli
  • H. Rohde
  • J. Montalvo
  • L. Quesada
  • M. Furdek
  • M. Ruffini
  • M. Schiano
  • N. J. Doran
  • N. Parsons
  • P. Townsend
  • Pfeiffer T.
  • R. Jensen
  • R. Wessaly

This paper reports on the architectural, protocol, physical layer and integrated testbed demonstrations carried out by the DISCUS FP7 consortium in the area of accessmetro network convergence. Our architecture modelling results show the vast potential for cost and power savings that node consolidation can bring. The architecture however also recognises ...

User Association and Resource Allocation Optimization in LTE Cellular Networks

  • Chen C.
  • Eitan Altman
  • Nessrine Trabelsi
  • Rachid El Azouzi
  • Roullet L.

As the demand for higher data rates is growing exponentially, homogeneous cellular networks have been facing limitations when handling data traffic. These limitations are related to the available spectrum and the capacity of the network. Heterogeneous Networks (HetNets), composed of Macro Cells (MCs) and Small Cells (SCs), are seen as ...

Dispersion management for nonlinearity mitigation in two-span 28 GBaud QPSK phase-sensitive amplifier links

  • Andrekson P.
  • Astra E.
  • Eliasson H.
  • Olsson S.

We present an investigation of dispersion map optimization for-span single channel 28 GBaud QPSK transmission systems with phase-sensitive amplifiers (PSAs). In experiments, when the PSA link is operated in a highly nonlinear regime, a 1.4 dB error vector magnitude (EVM) improvement is achieved compared to a one-span optimized dispersion map ...

Semantically Enhanced Mapping Algorithm for Affinity-Constrained Service Function Chain Requests

  • Bouten N.
  • De Turck F.
  • Famaey J.
  • Latre S.
  • Mijumbi R.
  • Serrat J.

Network function virtualization (NFV) and software defined networking (SDN) have been proposed to increase the cost-efficiency, flexibility, and innovation in network service provisioning. This is achieved by leveraging IT virtualization techniques and combining them with programmable networks. By doing so, NFV and SDN are able to decouple the network functionality ...

Demo: A Green Small Cells Deployment in 5G - Switch ON/OFF via IoT Networks & Energy Efficient Mesh Backhauling

  • Al Agha Khaldoun
  • Allal Imed
  • Gourhant Yvon
  • Mongazon-Cazavet B.
  • Senouci Sidi-Mohammed

In this paper, we address the topic of the deployment of small cells in the future radio access network 5G. We propos our new and original switch ON/OFF mechanism for small cells base stations based on Low Power Wide Area Networks (LPWAN). Our proposal aims to completely shutdown the small ...

Semi-analytical evaluation of concatenated RS/LDPC coding performance with finite block interleaving

  • Adriaan Suls
  • Guenach M.
  • Julie N.
  • Lefevre Y.
  • Marc M.

The Monte Carlo (MC) simulation of the error performance of a concatenated coding system with finite interleaving depth between the outer and inner codes is time-consuming, especially when targeting low error rates and examining several interleaver settings. In this contribution we present a semianalytical evaluation of the word error rate ...

A New PRACH Transmission Scheme in Unlicensed Spectrum

  • Luo Z.
  • Meng Y.
  • Tao T.

For the unlicensed spectrum, the occupied bandwidth requirement is demanded by some regulations. The legacy scheme of Physical Random Access Channel (PRACH) for Long Term Evolution (LTE) cannot satisfy it. In this paper, we propose a novel PRACH transmission scheme to satisfy the requirement of unlicensed spectrum based on preamble ...

Minimal Noise Variance Decoder for Uncoordinated Multiple Access in VLC

  • Abdullah A Saed
  • Chen C.
  • Jean-Marie Gorce
  • Siu-Wai Ho

This paper proposes an uncoordinated multiple access scheme for visible light communications (VLC) with positioning capability. The sinusoidal-based codes, proposed only for visible light positioning systems, are generalized in this paper by using a novel decoder design. The proposed scheme does not need a central unit to coordinate the transmission ...

power saving mechanism for contention-based M2M transmission

  • Wang H.
  • Yang L.

Massive number of devices must operate for a long time with very limited chance to contact energy sources in current Machine-to-Machine (M2M) networks, so power saving mechanism is very essential. In this paper, we analyze energy efficiency of two popular contention based data transmission methods (FSA and CTA) and proposed ...

Massive MIMO in Line-of-Sight Propagation

  • Marzetta T.
  • Yang H.

By calculating the effective max-min SINR (signal-to-interference-plus-noise ratio) and the corresponding power controls explicitly, and selectively dropping a small number of mobiles based on a simple and effective algorithm, we demonstrate that for both downlink and uplink, employing maximum-ratio or zero-forcing linear pre-coding and de-coding, Massive MIMO with max-min power ...

Unique Word DFT-Spread-OFDM for Fast Time-Varying Channels

  • Berardinelli G.
  • Frederiksen F.
  • Mogensen P.
  • Pedersen K.
  • Sorensen T.

Unique Word Discrete Fourier Transform -spread - Orthogonal Frequency Division Multiplexing (UW DFT-s-OFDM) waveform replaces the Cyclic Prefix (CP) with a known sequence which is contained in the symbol itself rather than being appended to it. In this paper, we propose a new UW DFT-s-OFDM design which aims at exploiting ...

Coverage Comparison of GPRS, NB-IoT, LoRa, and SigFox in a 7800 km² Area

  • Kovacs I.
  • Lauridsen M.
  • Mogensen P.
  • Nguyen H.
  • Sorensen M.
  • Vejlgaard B.

In this simulation work the coverage of GPRS, Narrowband-IoT, LoRa, and SigFox is compared in a realistic scenario, covering 7800 km2 and using Telenor's commercial 2G, 3G, and 4G deployment. The target is to evaluate which of the four technologies provides the best coverage for Internet of Things devices, which ...

Towards Zero Data Interruption Time with Enhanced Synchronous Handover

  • Gimenez L.
  • Kolding T.
  • Michaelsen P.
  • Nguyen H.
  • Pedersen K.

This paper presents enhancements for lowering the handover interruption time in future wireless networks. We propose a selective data forwarding for the handover preparation phase, and the integration of the make-before-break procedure with the synchronous random access-less handover. To evaluate our proposals, we analyze the handover timing for typical and ...

Indoor Deployment Strategies for Ultra Dense Urban Areas

  • Kovacs I.
  • Mogensen P.
  • Nguyen H.
  • Tavares F.
  • Wigard J.

Indoor deployments for providing coverage and capacity inside buildings is an attractive option for cellular network operators as most of the traffic in today's cellular networks is generated indoors. This paper studies the benefit of indoor traffic offloading on the overall network capacity using a new method that allows assessing ...

C/U Split Multi-Connectivity in the Next Generation New Radio System

  • Chen J.
  • Chen Z.
  • Chi J.
  • Du L.
  • Liu G.
  • Liu X.
  • Liu Y.
  • Qian X.
  • Yu T.
  • Zhao Z.
  • Zheng N.
  • Zhou H.

The next generation mobile network is foreseen as a heterogeneous network comprising not only the evolved existing systems but also the new radio (NR) spanning over the whole spectrum. Multi-connectivity (MC), where a UE aggregates the radio resources from multiple cells, provides an efficient way to fulfill the diverse 5G ...

Coverage and Capacity Analysis of Sigfox, LoRa, GPRS, and NB-IoT

  • Kovacs I.
  • Lauridsen M.
  • Mogensen P.
  • Nguyen H.
  • Sorensen M.
  • Vejlgaard B.

In this paper the coverage and capacity of SigFox, LoRa, GPRS, and NB-IoT is compared using a real site deployment covering 8000 km2 in Northern Denmark. Using the existing Telenor cellular site grid it is shown that the four technologies have more than 99 % outdoor coverage, while GPRS is ...

HOSVD-Based Denoising for Improved Channel Prediction of Weak Massive MIMO Channels

  • Amin M.
  • Haardt M.
  • Zirwas W.

Future mobile radio systems, like 5G, are setting extremely demanding targets with respect to the number of served users, data rates, and latency etc. Advanced techniques such as massive MIMO and joint cooperation over several distributed radio stations are being developed to achieve these targets. Channel prediction has been deemed ...

Pathloss Measurements and Modeling for UAVs Connected to Cellular Networks

  • Amorim R.
  • Kovacs I.
  • Mogensen P.
  • Sorensen T.
  • Wigard J.

This paper analyzes the radio channel between cellular network and Unmanned Aerial Vehichles (UAVs). The assessment is done by means of field measurements performed in a rural environment in Denmark. The tests were conducted in an operating LTE network (800 MHz), using a commercial cell phone placed inside the frame ...

Energy Efficient Coordinated Self-Backhauling for Ultra-Dense 5G Networks

  • Maeder A.
  • Prasad A.
  • Uusitalo M.

In recent past, the exponential growth in data rate demands have led to network operators constantly upgrading their network infrastructure in order to keep up with the demand. While the trends for data rate requirements are expected to continue in the future, mobile networks as part of evolution towards fifth ...