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.

Iterative decoding and channel estimation for space-time BICM over MIMO block fading multipath AWGN channel

Abstract: In this paper, we consider a generic model of space-time bit-interleaved coded modulation (ST-BICM) on a multiple-input multiple-output (MIMO) Rayleigh fading multipath channel. A practical low-complexity receiver structure performing iteratively MIMO data detection, channel decoding and channel estimation, is presented. The MIMO data detection, employing a reduced-state list-type soft output Viterbi algorithm enables to cope with severe channel intersymbol interference (ISI) without MIMO prefiltering. Among other results, simulations show that our approach can dramatically improve the downlink performance of time-division multiple access (TDMA) systems with high order modulation, keeping a reasonable complexity at the receiver side.

Analysis of ADSL traffic on an IP backbone link

Abstract: Measurements from an Internet backbone link carrying TCP traffic towards different ADSL areas are analyzed. For traffic analysis, we adopt a flow based approach and the popular mice/elephants dichotomy, where mice refer to short traffic transfers and elephants to long transfers. The originality of the reported experimental data, when compared with previous measurements from very high speed backbone links, is that the commercial traffic includes a significant part generated by peer-to-peer applications. This kind of traffic exhibits some remarkable properties in terms of mice and elephants, as we describe. It turns out that by adopting a suitable level of aggregation, the bit rate of mice can be described by means of a Gaussian process. The bit rate of elephants is smoother than that of mice and can also be well approximated by a Gaussian process.

Home-based remote medical assistance

Abstract: A system for providing a patient with remote medical assistance at home a patient station ( 100 ) includes at least a remotely controllable patient video camera ( 101 ) and a patient computer ( 110 ) provided with means ( 111 ) for acquiring data from medical assistance appliances ( 11, 12 ), with relay means ( 112 ) for forwarding commands to the appliances, and with means ( 113 ) for connection to a telecommunications network ( 3 ). A carer station ( 200 ) includes, at least a display screen ( 202 ) suitable for receiving images from the patient video camera ( 101 ), and a carer computer ( 200 ) provided with means ( 213 ) for connection to the telecommunications network ( 3 ) in order to set up a call with the patient station ( 100 ), means ( 211 ) for remotely controlling the patient station, suitable for remotely controlling the patient video camera ( 101 ) and for sending the commands to the patient computer ( 110 ), and means ( 212 ) for use after remote control for monitoring and feedback purposes by displaying on the display screen ( 202 ) images supplied by the patient camera ( 101 ) and by transferring to the carer computer ( 210 ) data that has been transmitted from the acquisition means ( 111 ) of the patient computer via the telecommunications network ( 3 ). The system is applicable to enabling patients to be cared for at home.

Hybrid wireless optics (HWO): Building the next-generation home network

Abstract: Gigabit home access networks (HANs) are a pivotal technology to be developed if the European Union (EU) Vision of the Future Internet is to be realised. Consumers will require such HANs to be simple to install, without any new wires, and easy enough to use so that information services running on the HAN will be ldquojust another utility,rdquo as, for instance, electricity, water and gas are today. The hOME Gigabit Access (OMEGA) HAN project [1] aims at bridging the gap between home and access network, providing Gbit/s connectivity to users. The project considers a combination of various technologies such as radio frequency (RF) and free-space or wireless optical links (FSO - operating at infrared and visible wavelengths) in order to meet user demands and provide wireless connectivity within and the home and its surroundings. When combined with power-line communications this enables a home backbone that meets the ldquowithout new wiresrdquo vision. A technology-independent MAC layer will control this network and provide services as well as connectivity to any number of devices the user wishes to connect to it in any room in a house/apartment, and further, this MAC layer will allow the service to follow the user from device to device. In order to make this vision come true, substantial progress is required in the fields of optical-wireless physical layers, in protocol design, and in system architecture.

Method for providing an on-demand software execution service

Abstract: A method for providing an on-demand software execution service comprising the following steps: receiving from at least one terminal, at least one request for executing at least one software package, by a virtual machine launched on a virtual machine launching server from files from a set of files for launching virtual machines, and selecting from a set of servers at least one server to which the request will be directed, according to a rule for distributing the execution load of virtual machines by servers of said set of servers.