Management of graphs by estimating anonymization parameters using machine learning techniques (PhD Midterm Evaluation)
- Maag M.
Since the arrival of Web 2.0, the user has become the central actor on the Internet. No longer a passive consumer of published information, the user on the Web has become the central focus with his relationships and interactions at the forefront. New technologies gave to each user the possibility ...
Clustering with Multiple Receiving Antennas and Imperfect CSI in Downlink CoMP Systems
- Baracca P.
- Boccardi F.
- Prof. Nevio Benvenuto
The impact of inter-cell interference in the downlink can be limited by allowing cooperation among base stations (BSs). Coordinated multi point (CoMP) schemes with joint processing (JP) assumes that BSs share data and channel state information (CSI) to serve the user equipments (UEs) by using joint precoders. By assuming perfect ...
Simulating Random Mobility with Exact Geometric Calculations: MobiLib Overview
- Gloss B.
Performance studies in mobile communications require us to take user mobility as an important stimulus for the systems into account. It was our research interest to study Mobile Communications in Heterogeneous Access Environments within the Nexus Project on Augmented World Models for Location/Context Aware Services that drove us to implement ...
Green Optical Slot Switching Torus for Mega-Datacenters
- Bigo S.
- Dupas A.
- Jenneve P.
- Mardoyan H.
- Mestre Adrover M.
- Pointurier Y.
- Uscumlic B.
We propose a torus topology to interconnect Optical Slot Switching rings using elastic-rate transponders. Power consumption in mega-datacenters can be reduced by more than 3x and interfaces and cables by more than 500x when compared with the traditional Ethernet architecture.
Power efficient service differentiation based on traffic-aware survivable elastic optical networks
- Morea A.
This study assesses the feasibility of defining different service classes based on protection schemes in core optical networks. Moreover, we propose a dedicated energy saving strategy for each of the service classes in order to minimize the overall power consumption of the network. Four classes of service are proposed: platinum, ...
Elasticity for dynamic recovery in optical transport networks
- Charlet G.
- Morea A.
- Verchere D.
We provide the advantages of 'just-enough' recovery due to the joint use of elastic optical networks with OTN switches in case of optical recovery
Complexity and Flexible Grid Networks
- Morea A.
Flexible grids promise to revolutionize the net- work design and control plane of future optical networks by providing increased adaptability of spectral resources to heterogeneous network conditions. Unfortunately, ﬂexibility is often provided at the cost of additional complexity in the network management. In this paper, we consider the optimization of ...
Cost benchmarking of different WSS sizes in OXCs
- Bertolini M.
- Morea A.
- Zami T.
We show how the size and the contention property of the add/drop blocks in the optical nodes impact the quantity of devices of the CONUS WDM network with incremental traffic.
Impact of traffic fluctuations and dedicated protection on energy savings in dynamic elastic optical networks
- Morea A.
- Turus I.
- Verchere D.
We present an analysis of the energy savings when taking into account a realistic traffic model. Daily and weekly traffic fluctuations as well as yearly traffic growth are taken into account when analyzing the power consumption given by the powered-on equipment as well as the IDLE opto-electronic devices. We also ...
Load-based Transparent Reach Maximization in Elastic Optical Networks
- Alberto Bononi
- Morea A.
- Paolo Serena
We propose a novel power-selection strategy for maximizing the transparent reach in elastic optical networks based on knowledge of the average wavelength load, and we quantify the savings in regenerations with respect to using the full-load standard reach.
IoT360 Lecture on IoT Service Platforms
- Roelands M.
Invited lecture at IoT360 Summer School, 31/10/2014, Rome, Italy, http://iot-360.eu/summer-school/summer-school-program/ Abstract: IoT Service platforms are not different from other (possibly distributed) stream-intensive service creation and execution environments, but the IoT perspective elicits generalisable requirements related to the observation & actuation interaction the platform has with the real world in which ...
HTTP/2 based adaptive Streaming : From QoE Improvements to a Unification with Real-Time Streaming
- Bostoen T.
- De Turck F.
- Huysegems R.
- Petrangeli S.
- Rondao Alface P.
- Van Der Hooft Jeroen
- Wauters T.
The paper investigates the possibilities offered by the new HTTP/2 protocol to improve the Quality of Experience (QoE) for HTTP adaptive streaming (HAS).
Active Learning via Label-Adapted Diffusion (or how to crack Big data with Small data)
- Kushnir D.
Active-Transductive Learning with Label-Adapted Kernels This paper presents an efficient active-transductive approach for classification. A common approach of active learning algorithms is to focus on querying points near the class boundary in order to refine it. However, for certain data distributions, this approach has been shown to lead to uninformative ...
Pseudo-Random Frequency Instability of Four-Wave Mixing between Modes in Few-Mode Fibers
- Esmaeelpour M.
- Essiambre R.
- Fontaine N.
- Ryf R.
- Toulouse J.
Large fluctuations of inter-modal four-wave mixing in a few-mode fiber are experimentally observed. These fluctuations are shown to occur for nonlinear interactions between the LP01 and LP11 modes of a few-mode fiber that persist in time and exhibit a strong frequency dependence.
A Transport-SDN application for incremental on-line network optimization
- Dembeck L.
- Ilchmann F.
- Milbrandt J.
Today, off-line network planning tools are used to optimize transport networks from scratch. A set of pre-planned wavelength services is taken into account for routing optimization. Performing such optimization in an operational transport network may lead to the rerouting of a large amount of wavelengths per link followed by massive ...
THE INFLUENCE OF CONFINEMENT ON THE HYDRODYNAMIC CHARACTERISTICS OF A CYLINDRICAL PILLAR WITHIN A MICROCHANNEL
- Jeffers N.
- O'Connor J.
- Punch J.
- Stafford J.
Microfluidic cooling technologies for future electronic and photonic microsystems require more efficient flow configurations to improve heat transfer without a hydrodynamic penalty. Although conventional microchannel heat sinks are effective at dissipating large heat fluxes, their large pressure drops are a limiting design factor. There is some evidence in the literature ...
Fair comparison of the contentionless property in OXC
- Zami T.
By comparing 2 distinct wavelength-routing Optical Cross-Connects (OXC), this study highlights the relevance to really consider dynamic traffic when assessing the contentionless property. This paper defends our current 1830 contentionless layout versus another approach recently proposed by Huaweï at ECOC'2014. This study demonstrates why the claim of Huaweï is inappropriate.
Key synchronization for end-to-end ODU service encryption
- Giouroukos P.
Operators consider the optical transport network secure since there is no direct access to the data-plane. However, Wikileaks and Snowden disclosures have proven this assumption wrong. Customers demand data encryption e.g. when interconnecting data centers. One possible solution is to take security measures at the gateway adding costs. Another solution ...
Pilot-aided Channel Estimation for Universal Filtered Multi-Carrier
- Schaich F.
- Wild T.
Universal Filtered Multi-Carrier (UFMC, a.k.a. UFOFDM) is a novel multi-carrier modulation technique, which aims at replacing OFDM for next generation wireless communication systems (5G). It is a generalization of OFDM and filter bank based multi-carrier (FBMC-FMT), which combines the advantages of OFDM and FBMC while avoids its main drawbacks. UFMC ...
Global Synchronization Protection for Bandwidth Sharing TCP Flows
- Lautenschlaeger W.
Synchronization effects between bandwidth sharing TCP flows are creating large queue size variations, or, if insufficiently buffered, loss in throughput. We propose an extension to ordinary queue operation that safely suppresses the synchronization. The solution is minimalistic in a sense that it needs only few extra operations in the fast ...