How to ensure reliable connectivity for aerial vehicles over cellular networks

  • Amorim Rafhael
  • Kovacs I.
  • Mogensen P.
  • Nguyen H.
  • Sørensen Troels
  • Wigard J.

Widely deployed cellular networks are an attractive solution to provide large scale radio connectivity to unmanned aerial vehicles. One main prerequisite is that coexistence and optimal performance for both aerial and terrestrial users can be provided. Todays cellular networks are, however, not designed for aerial coverage, and deployments are primarily ...

A Unified Array Geometry Composed of Multiple Identical Subarrays With Hole-Free Difference Coarrays for Underdetermined DOA Estimation

In this paper, we propose a unified array geometry, dubbed generalized nested subarray (GNSA), for the underdetermined direction-of-arrival estimation. The GNSA is composed of multiple, identical subarrays, which can be a minimum redundancy array (MRA), a (super) nested array, a uniform linear array (ULA), or any other linear arrays with ...

Optimal VNFs placement in CDN Slicing over Multi-Cloud Environment

This paper introduces a Content Delivery Network as a Service (CDNaaS) platform that allows dynamic deployment and life-cycle management of virtual Content Delivery Network (CDN) slices running across multiple administrative cloud domains. The CDN slice consists of four Virtual Network Function (VNF) types, namely virtual transcoders, virtual streamers, virtual caches, ...

MIMO Time-domain Equalization for High-Speed Continuous Transmission Under Channel Variability

High-speed communication over mutually coupled channels can be severely affected by intersymbol interference (ISI) and crosstalk (XT). Multiple-input multiple-output (MIMO) equalization is known to mitigate both ISI and XT, but requires accurate channel information at the receiver (RX) and/or transmitter (TX) when the channel is stochastic. However, since adjusting the ...

Coalitional Game for the Creation of Efficient Virtual Core Network Slices in 5G Mobile Systems

Many ongoing research activities relevant to 5G mobile systems concern the virtualization of the mobile core network, including the Evolved Packet Core (EPC) elements, aiming for system scalability, elasticity, flexibility, and cost-efficiency. Virtual EPC (vEPC)/5G Core will principally rely on some key technologies such as Network Function Virtualization (NFV), Software ...

Network Slicing & Softwarization: A Survey on Principles, Enabling Technologies & Solutions

Network slicing has been identified as the backbone of the rapidly evolving 5G technology. However, as its consolidation and standardization progress, there are no literatures that comprehensively discuss its key principles, enablers and research challenges. This paper elaborates network slicing from an end-to-end perspective detailing its historical heritage, principal concepts, ...

Correction Factor for Analysis of MIMO Wireless Networks With Highly Directional Beamforming

In this letter, we reconsider a popular simplified received signal power model with single stream beamforming employed by the transmitter and the receiver in the regime when the beams have high gain and narrow beamwidth. We define the correction factor as the ratio of the average actual received signal power ...

A Fast and Low-Loss Electromagnetically Tunable Optical Filter

Fast and simple optical filtering is a prerequisite for low-cost passive optical networking using multiple wavelengths to scale to higher capacity. We demonstrate a simple electromagnetically tuned optical filter capable of tuning across more than 700 GHz of optical spectrum in under 1 ms with low optical loss. We show ...

A Latency and Reliability Guaranteed Resource Allocation Scheme for LTE V2V Communication Systems

By leveraging the direct device-to-device (D2D) interaction, LTE Vehicle-to-Vehicle (V2V) communication becomes a promising solution to meet the stringent requirements of vehicular communication. In this paper, we propose to jointly optimize radio resource, power allocation, and modulation/coding schemes of the V2V communications, in order to guarantee the latency and reliability ...

Silicon Photonics Enabled Hyper-wideband RF Receiver With >85% Instantaneous Bandwidth

  • Chang C.
  • Chen Y.
  • Chimot N.
  • De Valicourt G.
  • Eggleston M.
  • Itoh T.
  • Kaneda N.
  • Kim K.
  • Lelarge F.
  • Sinsky J.
  • Wu M.

We demonstrate the first-ever silicon photonics enabled hyper-wideband RF spread-spectrum link. A silicon photonic mode-locked laser encoded with a four-channel silicon phase encoder is used to generate optical carriers that coherently demodulate a received RF signal spanning an instantaneous bandwidth greater than 85% of the center frequency (12GHz/14GHz). This allows ...

Cost-optimized submarine cables using massive spatial parallelism

  • Chraplyvy A.
  • Dar R.
  • Fevrier H.
  • Grubb S.
  • Huang K.
  • Winzer P.
  • Zsigmond S.

We study the techno-economics of submarine systems constrained by a fixed electrical power supply. We show significant cost savings for high-capacity submarine systems using massive space-division multiplexing (SDM), even without assuming any savings from SDM-specific subsystem integration. Systems with about 100 parallel optical paths are shown to provide minimum cost/bit, ...

Novel Lattice Reduction Algorithms: Precoder reduction and vector perturbation tradeoffs

  • Guenach M.

In this letter we present a novel iterative lattice reduction algorithm in precoded multiple input multiple output (MIMO) transmission. A unified framework is developed for this purpose, to reduce the precoder maximum row norm by iteratively minimizing the weighted sum of the precoder rownorms. We show that at each iteration ...

Multilevel Continuous Polarization Modulation with High Spectral Efficiency in the Depolarization Channels

  • Li R.
  • Liu F.
  • Wang B.
  • Wang X.

Facing the challenges of spectrum shortage and complex depolarization effects in wireless communication, a multilevel continuous polarization modulation (MCPoM) scheme is investigated to achieve high spectral efficiency and improve the symbol error rate performance in the practical depolarization channels. The principle of the MCPoM modulation is stated in details on ...

Measured Uplink Interference Caused by Aerial Vehicles in LTE Cellular Networks

  • Amorim R.
  • Biro D.
  • Kovacs I.
  • Mogensen P.
  • Nguyen H.
  • Sorensen M.
  • Sorensen T.
  • Wigard J.

Aerial users, such as unmanned aerial vehicles (UAVs), experience different radio propagation conditions than users on the ground. This is a concern regarding the integration of such users in the cellular networks in the near future. This paper investigates the impact of uplink transmissions from an aerial user equipment. Full ...

Multi-Flow Transmitter with Full Format and Rate Flexibility for Next Generation Networks

  • A. Vannucci
  • Boitier F.
  • C. Tsokos
  • Ch. Kouloumentas
  • D. Felipe
  • Dupuy J.
  • H. Avramopoulos
  • Jenneve P.
  • Jorge F.
  • Konczykowska A.
  • M. Spyropoulou
  • M. Tienforti
  • Mardoyan H.
  • N. Keil
  • P. Groumas
  • T. K. Johansen
  • V.Katopodis

We extend our proof-of-concept demonstration of a novel multi-flow transmitter for next generation optical metro networks. The multi-flow concept is based on the combination of spectrum and polarization sliceability, and its implementation on the combination of a polymer photonic integration platform with high-speed IQ modulators. In this work, we replace ...

Towards Massive Connectivity Support for Scalable mMTC Communications in 5G networks

  • Bockelmann C.
  • De Carvalho E.
  • Demestichas P.
  • Gregoratti D.
  • Ji Y.
  • Kosmatos E.
  • Navarro M.
  • Popovski Petar
  • Pratas N.
  • Raceala-Motoc M.
  • Saur S.
  • Schellmann M.
  • Stefanovic C.
  • Vivier G.
  • Wang Q.
  • Wunder G.

The fifth generation of cellular communication systems is foreseen to enable a multitude of new applications and use cases with very different requirements. A new 5G multiservice air interface needs to enhance broadband performance as well as provide new levels of reliability, latency and supported number of users. In this ...

Server Placement and Selection for Edge Computing in the ePC

  • Abe Y.
  • Hadzic I.
  • Woithe H.

Mobile Edge Computing (MEC) has received much attention from the research community in recent years. A significant part of the published work has studied the telecom-centric MEC architecture, which assumes that the computing resource is located at the edge of the mobile access network (e.g., the Evolved Packet Core or ...

Partial CSI Acquisition for Size-Constrained Massive MIMO Systems with User Mobility

We propose a low-complexity approach for the downlink of physically-constrained massive multiple-input multiple-output (MIMO) systems with user mobility. We examine a channel state information (CSI) acquisition strategy that exploits both the spatial and temporal correlation among the channels of adjacent base station antennas. The proposed strategy solely collects CSI for ...

On assuring survivability of network operator's services in evolving network environment

At the awakening of the 5G network, efforts of operators and vendors are being put in achieving understandable reliability of services in evolutionary network. The increasing users’ requirements with regard to the received service jointly to the evolving networking environment have introduced many challenges to service reliability. If the network ...

14.5Tb/s Transmission over OM2 Multimode Fiber with Wavelength and Mode Group Multiplexing and Direct Detection

  • Benyahya K.
  • Charlet G.
  • Ghazisaeidi A.
  • Renaudier J.
  • Simonneau C.

We demonstrate 14.5Tb/s bidirectional transmission over 2.2km of OM2 fiber using selective excitation of 4 mode groups, WDM multiplexing and direct detection. 40 wavelengths per mode group are used, each wavelength is modulated with discrete multitone (DMT) scheme with 512 subcarriers. A 88Gs/s digital to analog converter (DAC) is used ...