D. Marquet

• Diplom
• Orange Labs

The exponential growth in networks' traffic accompanied by the multiplication of new services like those promised by the 5G led to a huge increase in the infrastructures' energy consumption. All over the world, many telecom operators are facing the problem of energy consumption and Green networking since many years and they all convey today that it...

This paper deals with new cooling solution for high density telecommunication equipment. Cooling system is mandatory in order to maintain optimal air temperature and provide a safe environment for all telecom and computing equipment. As power dissipated by telecom is growing, air cooling solution reaches its physical limits. New solutions should be...

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...

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 ener...

MegaWatt-sized 380V direct current (DC) power interfaces systems intended to power data centre and telecom sites are now deployed in the field. The use of DC is not limited to telecom Information and Communication Technology (ICT) equipment. DC is suitable for simple renewable energy and smart grid functions, such as peak shaving. Researches and st...

In 2008, Orange Labs has contributed to the ITU-T Focus Group ?????????ICT and Climate Change?????????, in particular with a methodology to assess thoroughly the energy consumption by ICTs services and to determine the technical quantities on which they depend. [1] In IEEE/Telescon 2009 [2], Orange Labs presented its first element of research, whic...

We present a quantitative analysis of the benefits of the 380 VDC power distribution system compared to the current -48-VDC power supply system. The analysis is based on models of typical distribution configurations in global telecommunication sites and takes into account codes, regulations, and practices for wiring and voltage drop comparison betw...

In Intelec 2006, Orange Labs published a paper about its long experience in powering remote site stations and recent R&D study to optimize the dimensioning [1]

In the past Intelec, many presentations and DC panel have shown the advantage of using 48V DC power supply for Telecom. Reliability, simple scalability, modularity, low cost maintenance, reduced footprint, higher power efficiency than AC back-up architecture, high safety.

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 mode...

The France Telecom operator is highly involved in environmental preservation and part of it, is the scientific studies of ICT impacts associated with an active contribution to standardization bodies, observatories, groups, fora and initiatives such as ETSI and ITU-T. This paper describes France Telecom and university common research work in this fi...

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 (mechani...

Cette communication étudie l’intérêt de systèmes hybrides de production d’énergie électrique de faible puissance en site isolé, notamment pour des applications de télécommunication. L’élément principal de ces installations est un moteur thermique à apport de chaleur externe qui effectue la conversion de l’énergie solaire ou de la chaleur issue d'un...

The state of health of a battery is not easy to assess without testing the discharge. Besides, what is of more interest for France Telecom is remaining autonomy at constant power load. Several solutions are proposed using permanent test or monitoring systems or portable test devices. Without discussing the methods of measurements and their results,...

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 f...

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. Ind...

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 specifi...

Since the 70^th, 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,...

The invention concerns a system for remotely supplying an equipment (10) with low voltage direct current electricity. The invention is characterized in that said equipment (10) is arranged proximate an electrical installation (20), said system comprising: a remote power supply module (40) powered by a permanent direct current source (32), said modu...

Mobile terminals and communicating computers have generalized with lots of optimisation in their design and power. It seems that today appears a gap between the best known batteries and the still increasing power requirement of broadband multimedia terminal for a given mass and volume. This paper presents the probable energy requirements targets an...

The evolution of telecom network architecture and new services have always had impact on powering architecture. The power consumption increases with the generalization of wireless, broadband IP, triple play and services based on computers, and applications are more sensitive to local failure because of high equipment concentration and interdependen...

Reliability and availability calculation is a useful method used for energy chain architectures comparisons. In this work, a VRLA battery reliability taking into account age, working temperature, floating voltage regulation, and autonomy of the battery strings, is proposed. Others components failures rates are gathered from the field. Then an avail...

Predictive reliability and availability calculations of power supply systems are generally too optimistic compared to values observed in the field. This is mainly due to lack of data for subset, and use of inappropriate reliability blocks diagrams (RBD). France Telecom R&D has tried to improve the methodology. Battery and public mains interrupt sta...

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 po...

Facing the challenge to find a common power supply to DATACOM and telecommunications equipment, ALCATEL describes its approach about the power supply of future equipment while France Telecom gives an overview of the new power supply TENOR experimentation. Help for the choice of the power interface in terms of unavailability and autonomy are also pr...

This paper sets out the state of power supplies for France Telecom telecommunications systems. It attempts to predict future changes in requirements and the consequences this will have on the powering architecture. The first part of this paper deals with equipment installed in central offices and suggests a complete rethink of powering principles....

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 sta...

This article presents the most significant choices and the problems encountered during the design and conception of a 1 MHz single phase rectifier (230 V AC/48 V DC) of 1500 W with unity power factor

The RAMO network is the fundamental tool for operating the technical environment equipment of telecommunications centres which concern the power supply, cooling system, building surveillance, access control, security, EMC and electrostatic environment. It implements functions which make it possible to analyse the quality of the equipment's performa...

This paper presents the evolution of the energy power supply of telecommunication systems. The exchange and transmission equipment, centralized or distributed, need less and less power. The power is essentially used under electronic voltage (80 % under 5 V and 3 V for new technologies and some 12 V). Only 20 % of the power is delivered under 54 V f...

This paper presents the evolution of the energy power supply of telecommunication systems. The exchange and transmission equipment, centralized or distributed, need less and less power. The power is essentially used under electronic voltage (80 % under 5 V and 3 V for new technologies and some 12 V). Only 20 % of the power is delivered under 54 V f...

The authors deal with concepts about supplying power to electronic or optical switching exchanges based on the latest technical developments. They start from current and future energy needs estimations. Reliability data of telecommunications and their impact on the power supply required performance are studied. To support the assumptions, component...

A microprocessor unit has been developed that monitors a PV power plant through the public telephone network and with a Mintel terminal; records the battery voltage, the temperature, and operation parameters; and has a mean power of about 75 mW with automatic wake-up operation mode. This device is currently operating at various sites, and the first...

Following a general presentation of the system architectures for two types of reliable energy stations, GEODE and ALFATEL, used in telecommunication facilities, the authors describe the concept of a centralized management system covering several energy stations situated at different geographical locations. The role of communication with the power s...

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...

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...