Orange S.A.

About: Orange S.A. is a company organization based out in Paris, France. It is known for research contribution in the topics: Terminal (electronics) & Signal. The organization has 6735 authors who have published 9190 publications receiving 156440 citations. The organization is also known as: Orange SA & France Télécom.

Interdomain routing through QoS-class planes [Quality-of-Service-Based Routing Algorithms for Heterogeneous Networks]

Abstract: This article presents an approach to delivering qualitative end-to-end quality of service (QoS) guarantees across the multiprovider Internet. We propose that bilateral agreements between a number of autonomous systems (ASs) result in the establishment of QoS-class planes that potentially extend across the global Internet. The deployment of a QoS-enhanced border gateway protocol (BGP) with different QoS-based route selection policies in each of the planes allows a range of interdomain QoS capabilities to coexist on the same network infrastructure. The article presents simulation results showing the benefits of the approach and discusses aspects of the performance of QoS-enhanced BGP

Efficient implementations of multivariate quadratic systems

Abstract: This work investigates several methods to achieve efficient software implementations of systems of multivariate quadratic equations. Such systems of equations appear in several multivariate cryptosystems such as the signature schemes SFLASH, Rainbow, the encryption scheme PMI+, or the stream cipher QUAD. We describe various implementation strategies. These strategies were combined to implement the public computations of three asymmetric schemes as well as the stream cipher QUAD. We conducted extensive benchmarks on our implementations which are exposed in the final section of this paper. The obtained figures support the claim that when some care is taken, multivariate schemes can be efficiently implemented in software.

Method and device for controlling data packet traffic at the input of a network, and corresponding computer program and network equipment

Abstract: The invention relates to a method of controlling data packet traffic at the input of a network, whereby the traffic comprises N streams and/or substreams which are each associated with a priority level, N =2, and each of the aforementioned packets is marked with the priority level associated with the stream or substream to which said packet belongs. The inventive method comprises a step employing a token bucket mechanism with N operating levels and N token buffers each containing a number of available tokens, the tokens of each of the N token buffers being used to process one of the N priority levels. Moreover, each of the packets is accepted or refused according to whether or not it is possible for same to be attributed tokens depending on the tokens available at least in the token buffer which is used to process the priority level of each packet. In one particular embodiment of the invention, the tokens from the N token buffers are shared between the N priority levels, and a packet with priority level i can be attributed tokens from a token buffer which is associated with priority level j, said level having less priority, when there are not sufficient tokens available in the i priority level token buffer.

Optical add/drop multiplexer based on UV-written Bragg gratings in twincore fibre Mach-Zehnder interferometer

Abstract: The authors present the realisation of an all-fibre add/drop multiplexer based on UV-written Bragg gratings in the arms of a twincore fibre Mach-Zehnder interferometer. Experimental results of photoimprinting and wavelength adjustment of Bragg gratings on the two neighbouring cores of the fibre are demonstrated. Initial results on the use of the twincore fibre in an add/drop multiplexer configuration are reported.