Societe Francaise Du Radiotelephone

Google Inc.

Societte Francaise Du Radiotelephone

Societe Franciase Du Radiotelephone

Societe Francaise Du Radiotelephone-sfr

Imad Fattouch

Serge Barbosa Da Torre

Rabih Chrabieh

Stéphane Parniere

Frank Van Diggelen

Kevin William Watts

Mohammed Khider

Arastoo Zabolestani Moradi

Francois Vincent

Zifei Tong

François Vincent

David Orendorff

Soudabeh Serre

Guoyu Fu

Norbert Barbosa Da Torre

Marthe Laune

Nicolas Stefani

Patrick Bouffel

Damir Dragosevic

Abdelmjid Elghazi

Jean-Marc Hubert

Didier Doumenc

A method of processing signal paths includes receiving an estimated location for a GNSS receiver in an environment. The method also includes generating a plurality of candidate positions about the estimated location where each candidate position corresponds to a possible actual location of the GNSS receiver. The method further includes, for each available satellite at each candidate position, modeling a plurality of candidate signal paths by ray-launching a raster map of geographical data. Here, the plurality of candidate signal paths includes one or more reflected signal paths. At each candidate position, the method also includes comparing, the plurality of candidate signal paths modeled for each available satellite at the respective candidate position to measured GNSS signal data from the GNSS receiver and generating a likelihood that the respective candidate position includes the actual location of the GNSS receiver based on the comparison.

GNSS signal modeling

A method of predicting the level of radio field and/or the duration of radio propagation of a mobile telephone network for the coverage of a cell using the ray tracing technique and utilizing geographical databases, wherein the database directly utilized is a matrix base composed of pixels, each pixel carrying at least an information item specific to the type of ground cover and an information item specific to the height of the ground cover, a vectorization processing is applied to the matrix base to linearize the contours of obstacles encountered while rays are fictitiously traced, the rays according to the obstacles encountered being either reflected or diffracted and scattered, while the global attenuation and/or propagation duration is calculated, the vectorization processing of the contours of obstacles being applied to matrix bases to linearize the contours of obstacles encountered by forming straight lines whose positions and various angles are known accurately.

Method for predicting the radio field level and/or the duration of propagation of cellular telephone networks using high-resolution terrain databases

The simulation system according to the invention memorizes data representative of results of GPRS transfer quality measurements () made on test platform or similar for a variable number of time slots available for GPRS, of at least one quality of service indicator (), of at least one cell configuration () and of traffic volumes for the GSM circuit and GPRS data transfers (). Said system uses this data to simulate () arrivals of GSM circuit calls and GPRS data transfers, and subsequently to calculate a level of GPRS performance achieved for a selected cell configuration (). With the method of the invention it is possible, by dichotomy, to scale the radio interface of a given cell for a given traffic.

Method for scaling the radio interface for GPRS traffic and mixed GPRS and voice GSM traffic

This present invention concerns a method and a system for simulating and optimising the use of resources available in a zone of coverage of a mobile telephone network (RT), characterized, firstly, in that it is implemented by processing resources () of at least one resource optimization system () and, secondly, in that it includes the following stages determination (), by an event management module (EM) of the optimization system (), of a variation, called a disruption, of at least one packet (P) transmission (T) required within the network (RT), from at least one statistical distribution map (CR) held in storage resources () of the optimization system (), and that consists of data representing data packet (P) transmissions (T), selection () of a set of cells determining a simulated zone (ZS), by a resource operating-resources control module (CL), and then use of a routing algorithm in order to determine a routing path (CP) in the simulated zone (ZS) and to successively optimize the resources of the servers (ER) covering the successive cells of the routing path (CP)

Method and system for the simulation and management of the resources of a mobile telephone network

A modeling process for the deployment of the radio coverage of a cellular radiotelephony network, using a computer system that memorizes data representing reference coverage maps of the network, data representing geographic maps broken down into area delimited by a contour, called geomarketing data, data representing at least on type of radio station, data representing a sufficient coverage threshold and data representing a coverage threshold of each contour, the modeling process comprising selecting a geographic map, retrieving geomarketing data and data representing the corresponding reference coverage map, producing a regular grid with a determined spacing showing potential sites representing radio electric stations to be added inside the contour, using calculation functions of the computer and selecting or eliminating potential sites as a function of at least one criterion related to their usefulness.

Process and system for deployment of radio coverage of a cellular radiotelephony network

A method and a system for simulating and optimising the operating resources available in a coverage area of a mobile telephone network implemented by processing resources of at least one resource optimisation system and, can include definition, by an event-management module of the optimisation system, of a variation, called a perturbation, of at least one transmission of packets required within the network, from at least one statistical distribution map, selection of a set of cells determining a simulated zone, by means of an operating-resource control module, and then use of a routing algorithm to determine a routing path in the simulated zone, and to successively optimise the resources of the servers, definition by the event-management module, of data that represent at least one parameter relating to the transmission of the packets within each of the cells in the simulated zone, from amongst at least parameters of time-multiplexing of the packet, code-multiplexing of the packet, and the power required.

Method and system for simulation and management of the resources of a mobile telephone network

Frequencies are allocated to plural base stations for managing cells of a cellular wireless telephone network by a computer which for a given cell, allocates a frequency associated with an estimated minimal interference, and selects another cell of remaining cells to be processed. The computer (1) develops a chain of downstream cells within mutual radio range by repeating the above steps for each cell, (2) compares estimated interference levels with a threshold, (3) defines a remainder of cells by eliminating from the remaining set of plural cells to be processed, cells associated with an interference level less than the threshold, (4) develops a first segment of a chain of cells of allocated frequencies when the remaining cells have been defined, and (5) develops a second chain segment by allocating frequencies to the unprocessed remaining cells by searching for other frequencies to be allocated to the remaining cells by iterating these steps until no cells remain.

Method and apparatus for planning frequencies

The process for creating, administering and operating distribution maps of the radiocommunications traffic is executed by means of an information system storing data representative of geographical maps cut up into pixels according to the way the network is cut up, and data representative of the traffic in the network. A geographical zone is selected by interactive means between the user and the system and the traffic data corresponding to the zone are recovered and utilized to form at least one distribution map of the circuit traffic. The system calculates the traffic to flow at any point on the map by taking into account progress coefficients as a function of geomarketing data. The system also calculates the capacity of the network for traffic flow at any point. The sub-zones either under-sized or over-sized relative to the traffic can thus be defined.

Process and system for creating, administering and operating distribution maps of traffic on a radiocommunications network

According to the procedure for the definition of the topology of a cellular radiotelephony network consisting of several clusters to be defined, of stations for the administration of respective cells with shared borders, the stations of each cluster, each linked to a controller, connected to other controllers intended to administer the mobility of terminals,

Planification of localization areas (LAC)

A method of anticipatorily estimating the radio coverage by a base station of a cell of a cellular wireless telephone network includes devising a numerical map having a direct-access data matrix of local and independent specifications for the positions and types of salients of a plurality of predetermined meshes of a mesh topology corresponding to the map. In an operational phase, a simulated sampling beam associated with the radioelectric propagation conditions is transmitted in the cell along an initial path segment from an initial position and along a determined direction and under determined conditions of propagation. The position of the instantaneous site is compared with the mesh topology to identify an incidence mesh at a salient. Post-incidence propagation conditions are computed on the basis of local and independent data for salients of the incidence mesh.

Method of obtaining an anticipatory estimate of a cell's wireless coverage

A computer system generates constraint matrices for planning a cellular, wireless telephone network. A given number of specified carrier frequencies are allocated to plural radio base stations having specified positions and transmission powers. The stations act as a server cell or an interfering cell in a service zone. The computer: (1) predicts the field strength C of a field received in a mesh in the service zone at one of the server cell predetermined frequencies; (2) computes (a) for each of the meshes, the strength I of the interference field generated by the interfering cells, and (b) C/I for the 'server' cell provided I of an interfering field received in the mesh is larger than a predetermined value; and (3) determines a global interference proportion tbwhich is displayed or stored in a constraint matrix by integrating C/I over the entire service zone.

Method of and apparatus for creating constraint matrices

Method for establishing a radio coverage map of at least one cell for a cellular radio telephone network, by means of a calculation system using data memorized from a geographic map and the position of the cell and an associated radio base station, data memorized for a level of transmission for the station and a radio reception (S) sensitivity threshold for handsets, and data memorized for a radio propagation attenuation law, a method in which the calculation system generates a grid of the cell map with a certain number (N) of pixels on the map, calculates a number (N) of attenuations of radio propagation for the level of transmission by the station for the respective pixels and a number of average reception levels (S), associated with respective pixels, which it memorizes, and compares them with the sensitivity threshold (S) to determine a number of directions of disparity between the threshold value (S) and the value of the average reception level (S) associated with each pixel, a method characterized by the fact that the data representing a temporal fluctuation law for the attenuation of radio propagation having been made available to the calculation system, the latter applies the fluctuation law to the number (N) of average reception levels (S), it determines a corresponding number (N) of probabilities (P,) so that the aforementioned respective disparities have a certain direction, and it establishes the radio coverage map by associating with each pixel the data representing the aforementioned probability (P,).

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Paris, France

Imad Fattouch