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Today, mobile networks are witnessing an exponential growth of traffic volumes, linked to new services, especially for smart cities and smart-grid. The European Celtic-Plus SooGREEN project, started mid 2015, is targeting to reduce the energy consumption of the services in different mobile architectures in interaction with smart-grid. So GREEN is focused on the services energy consumption modelling...
For several years, the data rate and volume have increased continuously bringing more services, like TV on demand and Gaming. For fixed network, fibre to the home brings the higher data-rate and architecture is simple and reliable, however the replacement of last copper drop to customer has a high cost. In some case, it can be more economic to place broadband nodes such as MSAN (Multiple Services...
Medium voltage dc distribution systems are presently of interest for future naval warships. In order to provide hardware validation for research associated with the development of these systems, the Purdue Reduced-Scale Naval DC Microgrid has been constructed. This paper documents the system being constructed and provides some initial test results.
The article assesses the electricity consumption in use of telecommunication equipment to achieve one remote multi-user work meeting, an existing service proposed by Orange group. It also examines the electric gains of substitution for a meeting requiring physical transport. Equipment comprises participant computers PC and phones, access to core networks and servers to permit audio link and the share...
Reducing the environmental impact of mobile radio networks is a central factor in achieving improved mobile services. The Opera-Net 2 European project with the benefit of broad skills and expertise of its partners (operator, industry and academia) concentrates on this challenge, addressing models, new hardware architectures and designs, new cooling systems, life cycle assessment, material efficiency,...
Reducing the overall environmental impact of mobile radio networks is a central factor in achieving improved mobile services whilst at the same time enabling a growing telecommunications industry in emerging markets. The OPERA-Net-2 (Optimising Power Efficiency in Mobile Radio Networks 2) project concentrates on this challenge, addressing both energy and material efficiencies of 3G, 4G and heterogeneous...
Telecommunications are expected to reduce the energetic impact of human society through dematerialization. But in addition to their utilization consumption, the ICT equipments are responsible of energy consumption for their fabrication. To assess as precisely as possible their consumption and the gain compared to physical services, we use a new modular and open method intended to reduce errors and...
This paper presents a nonlinear reluctance network modeling a tubular surface mounted permanents magnets linear alternator. The ferromagnetic materials saturation is considered. The topology and the reluctance values of the network are automatically computed. The linkage between rotor and stator network is modified for each rotor position. The model allows a transient study and presents a good accordance...
This work reports a theoretical study of the dynamic behavior of a beta cinematic Stirling engine (BCSE) coupled with a synchronous permanent magnet linear alternator. The paper presents an analytical study of the BCSE. The objective is to evaluate the thermo-mechanical performances of the engine. The BCSE is designed to produce about 10 W (mechanical power). Helium is the working fluid. It results...
This paper is a presentation on behalf of ETSI of the new ETSI standard on control and monitoring of power and cooling systems for telecom sites and networks delivered by the working group EE2. As EE2 chairman, I'm in charge to present it.The new interface is based on ISO-OSI layer model, TCP/IP and http protocol. The minimum set of data is specified and formated using XML langage. The compatibility...
This communication studies the interest of using hybrid systems to produce low power electrical energy on remote sites, e.g. for telecommunication applications. The main element of these installations is a thermal engine using external heat. The energy conversion into electricity is carried out by a thermodynamic process from solar energy or from fuel combustion. We assess the sizing of different...
Portable devices (telephone, GPS, Walkman...) are more and more popular and sophisticated. Thus they require more and more energy for comfortable use of new functionalities (TV on telephones, video on Walkmans). The problem of the too frequent energy recharges of these objects, which make them less and less "nomadic", is then a topical subject. Indeed, the interest of having the video-telephony...
Since the 70th, France Telecom R&D has made researches to use solar and renewable energy for powering remote sites. This work includes sizing algorithms, new solutions for battery management, hybrid sources, remote management and several laboratory or field experimentations. The accelerated development of telecom in the world (wireless, broadband access), in a context of environmental concern...
Since the 1990s, France Telecom R&D, have investigated and experimented with different solutions for high-speed access networks on existing copper pairs. The first commercial product was ISDN and recently the deployment of ADSL. For these 2 networks, there was no need of active equipment along the path to the customer and consequently no special powering problem. In the future, still higher rate...
After a description of the common elements of the two decentralized power stations, GEODE and ALFATEL, designed and used by FRANCE TELECOM for its own power needs, this paper gives the main characteristics of each one about reliability, modular design and their control and management network. The paper ends with the range of equipment and their state of settling in FRANCE TELECOM network with the...
After a general presentation of a new kind of supply systems for telecommunication exchange developped from the A.C. source to DC outputs ; we give an overview of one of its most important subset: the decentralized DC rack ; it will be another opportunity to emphasize concepts like : - short battery autonomy, - use of the redundancy on the exchange, - wide voltage range, - high efficiency, - modularity...
This article is in line with the following papers. - GEODE, an electrical energy supply with high availability presented at the TOKYO Conference, - A new material and data processing for a high availability target : the GEODE system presented at the New-Orleans Conference. The introduction of new power supply equipment in telecommunications systems has brought about nex operating methods based on...
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