Testbed for security orchestration in a network function virtualization environment

  • Ahola K.
  • Holtmanns S.
  • Kalliola A.
  • Lal S.
  • Miche Y.
  • Oliver I.

We present a testbed implementation for the development, evaluation and demonstration of security orchestration in a network function virtualization environment. As a specific scenario, we demonstrate how an intelligent response to DDoS and various other kinds of targeted attacks can be formulated such that these attacks and future variations can ...

Hybrid Copper-Nanowire-Reduced-Graphene-Oxide Coatings: A ``Green Solution{''} Toward Highly Transparent, Highly Conductive, and Flexible Electrodes for (Opto)Electronics

  • Aliprandi A.
  • Anichini C.
  • Bonacchi S.
  • Bruna M.
  • Eredia M.
  • Laia C.
  • Moreira T.
  • Pinheiro C.
  • Samori P.
  • Sassi U.
  • Stoeckel M.

This study reports a novel green chemistry approach to assemble copper-nanowires/reduced-graphene-oxide hybrid coatings onto inorganic and organic supports. Such films are robust and combine sheet resistances (<30 Omega sq(-1)) and transparencies in the visible region (transmittance > 70%) that are rivalling those of indium-tin oxide. These electrodes are suitable for ...

Real-Time All-Digital Radio-over-Fiber LTE Transmission

  • Bohn T.
  • Ferling D.
  • Guy Torfs
  • Haolin Li
  • Johan Bauwelinck
  • Joris Van Kerrebrouck
  • Laurens Breyne
  • Piet Demeester

Radio-over-fiber is a key-enabling-technology for next generation wireless networks. To support an increasing number of antennas, a CloudRAN approach that maximally aggregates basestation functionality of the different antenna sites is the most economically feasible. To support light weight antenna units, analog radio-over-fiber is most promising. To mitigate linearity constraints of ...

Flexible resource allocation for device-to-device communication in fdd system for ultra-reliable and low latency communications

  • Li Z.
  • Singh B.
  • Uusitalo M.

Ultra-reliable and low latency communications is envisioned to enable new services and applications with high reliability, availability and low latency, e.g, factory automation, Tactile Internet. Device-to-device communication is one such mean that allows devices to experience benefits in terms of shorter communication latency. Currently most device-to-device communication in frequency-division duplex ...

Massive MIMO with Max-Min Power Control in Line-of-Sight Propagation Environment

  • Marzetta T.
  • Yang H.

A key component for the success of Massive MIMO is the asymptotic orthogonality of channel vectors. With M service antennas, the expected correlation between a pair of channel vectors in line-of-sight (LoS) propagation environment decreases at least as fast as log(M)/M while its counterpart in independent and identically distributed (iid) ...

Balanced Fair Resource Sharing in Computer Clusters

  • Bonald T.
  • Comte C.

We represent a computer cluster as a multi-server queue with some arbitrary bipartite graph of compabilities between jobs and servers. Each server processes its jobs sequentially in FCFS order. The service rate of a job at any given time is the sum of the service rates of all servers processing ...

Distributed Wi-Fi Interference Coordination for Dense Deployments

  • Abinader J.
  • Almeida E.
  • Cavalcante A.
  • Chaves F.
  • Choudhury S.
  • De Sousa J.
  • Doppler K.
  • Tuomaala E.
  • Vieira R.

Unlicensed spectrum is increasingly being used by mobile operators to meet the mobile traffic demand, and Wi-Fi is foreseen as one of the technologies for implementing mobile traffic offloading. However, Wi-Fi efficiency does not scale well as node density increases, and IEEE 802.11ax Task Group (TGax) was created in 2014 ...

Anthropogenic Space Weather

  • Baker D.
  • Balogh A.
  • Erickson P.
  • Gombosi T.
  • Huba J.
  • Lanzerotti L.

Anthropogenic effects on the space environment started in the late 19th century and reached their peak in the 1960s when high-altitude nuclear explosions were carried out by the USA and the Soviet Union. These explosions created artificial radiation belts near Earth that resulted in major damages to several satellites. Another, ...

Direct and Electroabsorption Modulation of a III-V-on-Silicon DFB Laser at 56 Gb/s

  • Abbasi A.
  • Bauwelinck J.
  • Duan G.
  • Moeneclaey B.
  • Morthier G.
  • Roelkens G.
  • Verbist J.
  • Yin X.

In order tocope with the ever-growing Internet traffic, high-speed optical interconnects are becoming indispensable. Silicon photonicsis emerging as a key technology for such inter-connects. In this paper, we demonstrate 56 Gb/s nonreturn to zeroon-off keying (NRZ-OOK) direct modulation based on a high bandwidth heterogeneously integrated III-V-on-silicon distributed feedback laser, as ...

Long-haul coherent communications using microresonator-based frequency combs

  • Abel Lorences-Riesgo
  • Andrew M. Weiner
  • Attila Fülöp
  • Dan E. Leaird
  • Eriksson T.
  • Mikael Mazur
  • Minghao Qi
  • Pei-Hsun Wang
  • Peter A. Andrekson
  • Victor Torres-Company
  • Yi Xuan

Microresonator-based frequency combs are strong contenders as light sources for wavelength-division multiplexing (WDM). Recent demonstrations have shown the potential of microresonator combs for replacing tens of WDM channels with a single laser-pumped device. These experiments relied on microresonators displaying anomalous dispersion. Devices operating in the normal dispersion offer the prospect ...

Connectivity graph reconstruction for networking cloud infrastructures

  • Dubus S.
  • Kanoun W.
  • Mensah P.
  • Morin C.
  • Piolle G.
  • Totel E.

Cloud providers have an incomplete view of their hosted virtual infrastructures managed by a Cloud Management System (CMS) and a Software Defined Network (SDN) controller. For various security reasons (e.g. isolation verification, modeling attack paths in the network), it is necessary to know which virtual machines can interact via network ...

Simplified extended Kalman filter phase noise estimation for CO-OFDM transmissions

  • Le S.
  • Megret P.
  • Nguyen T.
  • Wuilpart M.
  • Yakusheva T.

We propose a flexible simplified extended Kalman filter (S-EKF) scheme that can be applied in both pilot-aided and blind modes for phase noise compensation in 16-QAM CO-OFDM transmission systems employing a small-to-moderate number of subcarriers. The performance of the proposed algorithm is evaluated and compared with conventional pilot-aided (PA) and ...

Simultaneous four-channel thermal adaptation of polarization insensitive silicon photonics WDM receiver

  • Chen Y.
  • Dong P.
  • Gatdula R.
  • Kim K.
  • Melikyan A.

We propose a novel approach to demonstrate simultaneous multi-wavelength locking during temperature changes in a silicon photonic polarization insensitive microring-based wavelength division multiplexing (WDM) receiver. The DC component of a single monitoring photodetector at the through port of the microring filter array is exploited as a feedback signal with no ...

Advances in extreme learning machines (ELM2015)

  • Huang G.
  • Lendasse A.
  • Miche Y.
  • Toh K.
  • Vong C.

Rich Network Anomaly Detection Using Multivariate Data

  • Mendiratta V.
  • Thottan M.

Modern telecommunication networks are complex, and generate massive amounts of data in the form of logs and metadata. Though these networks are designed for high reliability, when they do fail or encounter performance degradations, given the complexity, it is difficult to detect and diagnose problems in a timely manner. Existing ...

BRACE: Cloud-based Software Reliability Assurance

  • Asthana A.
  • Mijumbi R.
  • Okumoto K.

The evolution towards virtualized network functions (VNFs) is expected to enable service agility within the telecommunications industry. To this end, the software (or VNFs) from which such services are composed must be developed and delivered over very short time scales. In order to guarantee the required levels of software quality ...

Coherent frequency tuneable thz wireless signal generation using an optical phase lock loop system

  • Balakier K.
  • Fice M.
  • Graham C.
  • Ponnampalam L.
  • Renaud C.
  • Seeds A.
  • Shams H.
  • Van Dijk F.

We demonstrate experimentally, for the first time, the photonic generation of a continuous tunable THz wireless signal based on using an optical phase lock loop (OPLL) subsystem and optical frequency comb generator (OFCG). The OPLL is employed to select one line from the optical comb and shift it by the ...

Electro-Absorption modulator-based optoelectronic oscillator

  • Alouini M.
  • Debregeas H.
  • Lanteri D.
  • Primiani P.
  • Van Dijk F.

In the perspective of a monolithic integration of an optoelectronic oscillator on photonic integrated circuits, we evaluate the performances of integrated DFB laser and electro-absorption modulator devices. For this purpose two identical chips have been used, the first for laser emission and amplitude modulation and the second for photo-detection. The ...

Analytics-Enhanced Automated Code Verification for Dependability of Software-Defined Networks

  • Jagadeesan L.
  • Mendiratta V.

Software-defined networking (SDN) is a key emerging technology that enables networks to be programmed and dynamically reconfigured through software-based network applications. This programability also significantly increases the exposure of these networks to software application faults, which can compromise or crash the underlying SDN network. It is thus imperative to detect ...

Novel market approach for locally balancing renewable energy production and flexible demand

  • Horta J.
  • Kofman D.
  • Menga D.
  • Silva A.

Future electricity distribution grids will host a considerable share of variable renewable energy sources and local storage resources. Moreover, they will face new load structures due for example to the growth of the electric vehicle market. These trends raise the need for new paradigms for distribution grids operation, in which ...