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France Telecom

France Telecom Etablissement Autonome De Droit Public

Houmed Ibrahim

Benoit Lemoine

Benoît Lemoine

Marcel Guibert

Yannick Le Louedec

Daniel Ronarc'H

Methods are provided for communication in a broadcast group and for collecting real time data in a broadcast group. The broadcast group includes a set of sources that send real time data, the set being made up of at least two sources and a server. A data-sending source of the group sends first time information relating to a first exchange of control data of the first source with the server by broadcasting to the members of the group. The first exchange is the one and only exchange of control data of the first source with the members of the broadcast group. The data-sending source receives second time information sent by the server and relating to the first exchange of control data between the first source and the server and to a second exchange of control data between the second source and the server. The source also receives second time data from other sources of the group and determines a transmission time between itself and another source of the group from the first and second received time information.

Method of collecting real time data

A subscription to a service provided in a communication network is managed by a first terminal. The communication network includes a second terminal, and the service includes transmission of digital information. An access is capable of obtaining a maximum rising throughput value allocated to the first terminal and a descending throughput value allocated to the second terminal. On the access of the network, an access request is received for subscribing the second terminal to the service provided by the first terminal. Then, a decision about access to or refusal of subscription of the second terminal is made on the basis of the maximum rising throughput value allocated to the first terminal and on the basis of the descending throughput value allocated to the second terminal. And finally, a response indicating the decision is sent.

Access control for a service subscription

An optical amplifier having a doped fluoride glass optical fiber and a process for producing such an amplifier. To produce the doped fluoride glass fiber amplifier which is operable to amplify a light signal (S), an optical multiplexer (4) is produced having on the one hand two silica fibres (6, 8) and on the other a fluoride glass fiber (2), whereof at least one section is doped and an optical coupling is brought about between the fluoride glass fiber and at least one other silica fibre (12, 14).

Optical amplifier having a doped fluoride glass optical fibre and

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Lannion, France

Houmed Ibrahim