Abstract: The invention concerns a method of estimating the noise power of a given digital signal (cell1) assigned a code, this signal being received by a receiver (56) simultaneously with a plurality of other digital signals assigned different codes. The noise powers are estimated for each of the received digital signals (cell1, cell2, . . . cellM) assigned codes and there is assigned, to the given signal, the mean noise power (62) which is the ratio between, on the one hand, the sum of the estimated noise powers and, on the other hand, the total number M of received codes.

Abstract: A method and apparatus is for buffering data cells in a queuing element is presented. Each queuing element includes a partitioned buffer, where the partitioned buffer includes a plurality of partitions. Each of the partitions stores data cells received by the queuing element. Storage of the data cells into the partitions is accomplished by using an array of logical queues. Each logical queue of the array of logical queues maps data cells corresponding to that logical queue to a particular partition of the plurality of partitions. More than one logical queue may map data cells to a particular partition. Each partition may include a reserved portion, where each logical queue that maps to the partition may map a portion of its data cells to the reserved portion. The resources of the reserved portion to which a logical queue maps data cells are reserved to that specific logical queue and cannot be utilized by other logical queues.

Abstract: A method for operating a telecommunications network, a service agent for the same and a network management system, equipped with the latter, particularly in the form of at least one computer of a network management system, or a user interface module, in which event messages concerning a network element of the telecommunications network are transmitted to the service agent for maintenance and/or monitoring and/or control service, and the event messages which are irrelevant to the service to be provided by the service agent are filtered out. The service agent determines a relationship between a first relevant event message and a second event message in respect of the service to be provided and instructs output means to output a first event message and a second event message according to the relationship.

Abstract: The present invention relates to a method for determining the position of a mobile station, called non-located mobile station, in a wireless network comprising in addition at least one already located station, said method comprising the following steps:

Abstract: A decision system for a modulated electrical signal delivered by a converter in response to a received modulated optical signal compares the amplitude of the electrical signal to a reference level, measures an average amplitude of the electrical signal, and generates the reference level as a function of the result of such measurements so that the “reference level/average amplitude” ratio can be adjusted to a predetermined constant value different from 1. Applications include receivers for optical packet transmission systems.

Abstract: In source routed or hop-by-hop routed protocol communication networks, when congestion is detected at a certain network element, a notification message is sent to nodes. The nodes keep track of congestion condition and generally have knowledge of the congestion, thereby allowing them to make more intelligent routing decisions, i.e., rate controlling messages, routing traffic around congestion, regulating admission at the edge of the network. The intelligent routing decision is based on the congestion condition indicated by a restriction level which is periodically and dynamically updated.

Abstract: A cable includes a tubular jacket which surrounds a plurality of protection tubes in which optical fibers are accommodated in groups and have a relative freedom of movement. These tubes are disposed in layers in which they are disposed in a helix. The cable includes at least one layer made up of an assembly of tubes which have an outside diameter smaller than that of the tubes of a layer that they surround and the tubes of the two layers all contain the same number of optical fibers.

Abstract: The invention relates to a circuit arrangement for a receiver for receiving bursts of a non-continuous signal, with a device for tuning to the current parameters of the signal required for evaluating a burst, in which the device for tuning is controlled in such a way that the parameters achieved at the end of a burst are extrapolated to the start of the next burst and used to evaluate it and as the starting point for further tuning, and also a transceiver for subscriber-side connection to a local wireless access network for the worldwide telecommunications network, the receiving part of which contains a circuit arrangement of this kind.

Abstract: A heat transfer device includes a capillary-pumped first fluid loop including an evaporator situated on a satellite in the vicinity of a source of dissipated heat and a condenser connected by heat transfer members to the evaporator and situated on a deployable radiator panel of the satellite. The deployable radiator comprises at least two panels, and the heat transfer device itself further comprises at least one second capillary-pumped fluid loop. The fluid loops are connected in cascade with each other so that the evaporator of each fluid loop other than the first fluid loop is on the same panel as the condenser of the preceding loop and the condenser of each fluid loop other than the first fluid loop is on the panel next to that carrying the condenser of the first loop. The evaporator of one loop is connected to the condenser of the same loop by flexible heat transfer members.

Abstract: Method for performing encryption of a data stream, the method comprising the steps of using encoding means to apply a mapping operation to the incoming data, to apply a reversal operation, to apply a key combination operation, to apply a demapping operation, and comprising the steps of taking and the re-combining the outgoing data with the incoming data. According to the present invention, it is possible to apply the mapping operation upwards of the re-combination operation between the incoming data stream and the outgoing data stream, to apply the demapping operation downwards of the data stream taking operation and to implement a simplified reversal operation.

Abstract: The present invention provides a method of installing a tubular element in a cavity. The method comprises the following steps: preparing a unit comprising said tubular element and a layer of a fixing compound which covers the entire outer periphery of said tubular element, at least over a fraction of its length; positioning said unit along the inside wall of said cavity; and applying activation treatment to said compound in such a manner as to fix said tubular element to said inside wall. The unit is preferably placed on the bottom of the cavity.

Abstract: The present invention relates to a method of forming and managing itineraries or routes and to a network implementing the method. The method of forming and managing itineraries or routes consists in providing a plurality of software modules each controlling and verifying one or more means and/or resources, and having means for communicating with one or more other modules to form an itinerary by building up an ordered chain or succession of software modules allocated to said itinerary and each locked in a given state that depends on its contribution to said itinerary, and in dismantling said itinerary after it has been used by releasing said software modules allocated thereto, the various stages of existence of such an itinerary being defined by consecutive operating sequences affecting said software modules and their associated means and/or resources, and comprising successive allocation, control/verification, and release sequences.

Abstract: The invention relates to a single-mode optical fiber that, for a wavelength of 1550 nm, has an effective area greater than or equal to 60 &mgr;m2, chromatic dispersion lying in the range 3 ps/(nm.km) to 14 ps/(nm.km), a chromatic dispersion gradient in the range 0 ps/(nm2.km) to 0.1 ps/(nm2.km), and a ratio between the effective area and the chromatic dispersion gradient that is greater than or equal to 1000 &mgr;m2.nm2.km/ps, as well as a zero chromatic dispersion wavelength shorter than 1480 nm. The fiber thus has both a large effective area and a shallow chromatic dispersion gradient, and it is thus well suited to wavelength division multiplexed (WDM) transmission. The invention also relates to a WDM optical fiber transmission system that uses such a fiber as the line fiber.

Abstract: The invention relates to a dispersion shifted monomode optical fiber which, in the wavelength range 1400 nm to 1650 nm, presents both a chromatic dispersion maximum and a chromatic dispersion slope of absolute value less than 0.05 ps/nm2·km. Advantageously, the maximum in the wavelength wave 1400 nm to 1650 nm is a single maximum. The fiber also presents dispersion having a slope of absolute value less than 0.03 ps/nm2·km in the wavelength range 1530 nm to 1580 nm. The fiber of the invention is particularly suitable for wavelength division multiplexed transmission systems.

Abstract: The invention relates to an adaptive material having ternary compositions. They can advantageously be used in electric cables and in terminations thereof where it serves to improve charge flow characteristics and reactions to transient electric fields. This composite material having non-linear electrical resistance comprises a polymer matrix and varistor means comprising zinc oxide, and it further includes a wetting agent.

Abstract: A method of manufacturing an optical fiber preform (3) comprising: forming at least one silica-based outer deposition layer (23) by depositing silica on a primary preform (24) constituted by a bar mainly comprising silica and including a silica-based outer peripheral portion (22), the method being characterized in that the viscosity of the outer deposition layer (23) is adjusted to be substantially identical to the viscosity of the outer peripheral portion (22) of the primary preform (24) by adding to the silica, over a substantial portion of the outer deposition layer (23), at least one compound selected from the group formed by the following compounds: CaF2, MgF2, AlF3, B2O3, and Al2O3.

Abstract: The invention relates to polarization mode dispersion; writing index variations in a grating written in an optical fiber generates polarization mode dispersion. The invention proposes to compensate this polarization mode dispersion by mechanical curvature of the fiber. The invention provides a simple method of compensating polarization mode dispersion effectively and improving the performance of a grating written in a fiber; it applies in particular to Bragg gratings.

Abstract: A method of compressing animated images displayed on a screen defined by a frame of pixels, in particular a mobile telephone screen, consists of using a first algorithm for compressing an image in which the percentage of pixels modified relative to the preceding displayed image is greater than or equal to a particular threshold and a second algorithm for compressing an image in which the percentage of pixels modified relative to the preceding displayed image is less than or equal to the threshold.

Abstract: A method and apparatus is disclosed for differentiating service in a data network which supports a plurality of service classes, by implementing a pricing strategy such that revenue for the ISP in non-busy hours in increased. An edge router assigns a predetermined packet service class value, which is either an artificial packet loss probability or an artificial packet delay, to each one of an associated plurality of service classes, of packets in a data stream, the predetermined packet service class value decreasing with the increasing importance degree of each of its associated plurality of service classes. The packets are delayed or dropped according to the predetermined packet service class value and according to a load on the data network.

Abstract: An electronic device is described which can be used by a user to unlock a locked password protected electronic device (e.g., PDA, wireless phone, laptop computer, personal computer . . . ). To unlock the locked password protected electronic device, the user activates the electronic device to wirelessly transmit a password (e.g., electronic key) towards the locked password protected electronic device. The locked password protected electronic device uses the received password to unlock itself so that the user does not have to remember the password and also does not have to physically input the password into the locked password protected electronic device in order to unlock and use the password protected electronic device. The electronic device can also be used by the user to lock an unlocked password protected electronic device. Moreover, the electronic device can be incorporated within an article that the user generally has in his/her possession including a ring or a watch.