Enforcing Users Constraints In Dynamic Software-Defined Networks Of Devices

  • Boussard M.
  • Bui D.
  • Peloso P.

Paper to Netsoft 2016 detailing the policies defined for multi-tenants sharing of devices

Quality of experience-aware enhanced inter-cell interference coordination for self organized HetNet

  • Morel M.
  • Randriamasy S.

Fifth-generation (5G) mobile networks are geared to support future services such as enhanced Mobile BroadBand. They already face dramatic data traffic increase mainly due to the generalized demand by mobile consumers for Full High Definition/High Definition (Full HD/HD) video services. The most viable solution to solve this problem is to ...

Pilot allocation for multi-cell tdd massive mimo systems

  • Gacanin H.
  • H. Furukawa
  • O. Muta
  • W. Hao

Pilot contamination due to the pilot reuse in adjacent cells is a very serious problem in time-division duplex (TDD) based massive multi-input multiple-output (MIMO) system. Therefore, the pilot-user allocation is significant for improving the performance of the system. In this paper, we formulate the pilot-user allocation optimization problem for maximizing ...

Investigation of Non-Orthogonal Multiple Access Techniques for Future Cellular Networks

  • Ghosh A.
  • Keating R.
  • Ratasuk R.

There is an expected explosion in the number of users which will be connected to future wireless networks with the continued expansion of the Internet of Things. New technologies are needed in order to keep up with this connectivity demand. Non-orthogonal multiple access (NOMA) is one technology which seeks to ...

Mobility and Reliability in LTE-5G Dual Connectivity Scenarios

  • Lobinger A.
  • Martikainen H.
  • Viering I.
  • Wegmann B.

We are studying the mobility performance and the associated reliability of dual connectivity (DC) between a Long Term Evolution (LTE) macro layer and a 5G small cell layer in an urban environment. We will observe that the reliability benefits of using basic DC as known from LTE are much smaller ...

5G New Radio UL Coverage with Peak Clipping

  • Kaikkonen J.
  • Levanen T.
  • Nielsen S.
  • Pajukoski K.
  • Renfors M.
  • Valkama M.

For the 5G new radio physical layer the CP-OFDM waveform has been chosen as the baseline for communications below 40 GHz. The requirement for multicarrier waveforms used for uplink is to achieve similar coverage as achieved by SC-FDMA in LTE uplink. In this paper, multiple candidate waveforms with enhanced CP-OFDM ...

Using LTE Networks for UAV Command and Control Link: A Rural-Area Coverage Analysis

  • Amorim R.
  • Kovacs I.
  • Mogensen P.
  • Nguyen H.
  • Wigard J.

In this paper we investigate the ability of Long- Term Evolution (LTE) network to provide coverage for Unmanned Aerial Vehicles (UAVs) in a rural area, in particular for the Command and Control (C2) downlink. The study takes into consideration the dependency of the large-scale path loss on the height of ...

Non-Orthogonal Coded Access for Contention-Based Transmission in 5G

  • Liu M.
  • Miao D.
  • Sun J.
  • Wang Q.
  • Zhang Y.
  • Zhao Z.
  • Zhong Z.

The fifth generation (5G) wireless network faces unprecedented massive concurrent random access requests in uplink (UL) contention-based (CB) transmission. In this paper, a non-orthogonal coded access (NOCA) UL transmission in combination with parallel interference cancellation (PIC) based reception scheme at base station is investigated. Non-orthonormal code generated by Zadoff-Chu (ZC) ...

Transport Network Design for FrontHaul

  • Bouillard A.
  • Deiss T.
  • Mathieu F.
  • Sehier P.

The evolution of LTE and advent of 5G networks increases further the bandwidth requirements for RAN. In parallel, the deployment of Centralized RAN architecture raises new challenges on the FrontHaul network. The inflexibility of the legacy CPRI is the primary challenge to Virtualized RAN deployments, and there is currently a ...

Cost of Increased Bandwidth Efficiency in 5G NR

  • Levanen T.
  • Pajukoski K.
  • Renfors M.
  • Valkama M.

In this paper, subband filtered CP-OFDM and windowed CP-OFDM waveforms proposed for 5G new radio (NR) are compared to LTE-like downlink and uplink waveforms under different power amplifier (PA) models. The effects of subband filtering or windowing are evaluated in terms of out-of-band and inband emissions, average error vector magnitude ...

Optimizing Synchronous Handover in Cloud RAN

  • Gimenez L.
  • Kolding T.
  • Pedersen K.

Radio networks are at the brink of a transformation in order to meet new requirements for high data and device densities expected for the Internet-of-Things (IoT) era. Cloud technology is positioned to be a key element in building effective 5G radio networks, so-called Cloud RANs. In this paper, we focus ...

Interference Analysis for UAV Connectivity over LTE Using Aerial Radio Measurements

  • Amorim R.
  • Kovacs I.
  • Mogensen P.
  • Nguyen H.
  • Wigard J.

The use of Unmanned Aerial Vehicles (UAV) for civilian and commercial services has experienced a significant increase in the past couple of years. Emerging UAV enabled services, however, require extended beyond-visual-line-of-sight geographical range. One key regulatory requirement for these services is that the radio communication link must reliably cover a ...

Applying Neural Networks in Optical Communication Systems: Possible Pitfalls

  • Buelow H.
  • Eriksson T.
  • Leven A.

We investigate the risk of overestimating the performance gain when applying neural network based receivers in systems with pseudo random bit sequences or with limited memory depths, resulting in repeated short patterns. We show that with such sequences, a large artificial gain can be obtained which comes from pattern prediction ...

On the Bit Error Rate of Optical Transmission Systems Corrupted by Bivariate Additive White Gaussian Noise

  • Bigo S.
  • Delezoide C.
  • Essiambre R.
  • Frignac Y.
  • Jenneve P.
  • Layec P.
  • Ramantanis P.

We derive in integral form the exact Bit Error Probability for QPSK constellations corrupted by elliptic AWGN. We show that for an in-phase/quadrature noise the performance only depends on the overall Signal to Noise Ratio and not on noise ellipticity.

32-degree OXC with very low add/drop contention

This study reports a colorless/directionless wavelength routing Optical Cross-Connect (OXC) based on multicast switch partially equipped with variable splitters, to achieve a 32-degree OXC with negligible add/drop contention probability and still with reasonable intermediate amplification.

Impact of Software Defined Contention in OXC at network level

This study quantifies how software defined contention influences the number of MCS-based add/drop stages needed to serve a given set of connections, over 2 distinct WDM network topologies.

Numerical Investigation and Scaling Rules for the Estimation of Nonlinear Interference Variability of Dispersion Managed and Unmanaged Systems in Presence of PMD and Kerr Effects

  • Fazel S.
  • Frignac Y.
  • Ramantanis P.
  • Rossi N.

We estimate the Kerr nonlinear noise variance for WDM-PDM QPSK links and its variability in presence of PMD. Results specify rules giving the PMD-based NLI statistics and its evolution with distance for both legacy and recent coherent link designs. Introduction Prediction of Quality of Transmission (QoT) has been actively investigated, ...

Achieving Near Maximum Ratio Combining Diversity Gains With Directive Antennas

  • Chizhik D.
  • Feick R.
  • Rodriguez M.
  • Valenzuela R.

We present an empirically based comparison of the effectiveness of spatial and angular diversity systems in outdoor-to-indoor fixed wireless links. We concentrate on the simple to implement, single RF-chain selection diversity systems. We find that for such systems, angular diversity very significantly outperforms spatial diversity using comparatively sized arrays. This ...

Duobinary IQ Modulation Schemes for C- and O-band PAM4 Direct Detect Systems

  • Buchali F.
  • Buelow H.
  • Chagnon M.
  • Dischler R.
  • Eriksson T.
  • Stephan Ten Brink

We present two novel modulation schemes for PAM4 direct detect systems employing duobinary signals as least and most significant bit. One format, designed for C-band, is experimentally demonstrated at 70 GBaud. The other, for O-band, is compared to conventional PAM4.

Fully monolithic integrated silicon photonics slave transceiver for short-reach network

  • Chen Y.
  • De Valicourt G.
  • Dong P.
  • Kakande J.
  • Sinsky J.
  • Tkach R.

We demonstrate an ultra-compact monolithic integrated silicon-based slave transceiver integrating a D-BPSK receiver and a polarization insensitive reflective modulator. We successfully achieved 25 Gbit/s OOK-NRZ modulation for the upstream and 25 Gbit/s D-BPSK detection for the downstream as well as transmission over the full C-band and few km.