Cassidian Sas

Airbus Ds Sas

Vincent Seguy

Christophe Gruet

Gérard Marque-Pucheu

A first broadband network divided into sectors and a second narrowband network have collocated cells and a common wide frequency band. The interference produced by the first network on the second network is reduced for a carrier to interference ratio threshold allowable at the reception in the second network. For example, a base station (BS) in a given cell (C) of the first network attenuates by an attenuation parameter the emission power of each subcarrier which is adjacent to a carrier of one of the groups allocated to preselected cells (C) of the second network in a sector (S) of the given cell and on levels (Lto L) starting from the given cell (C). The attenuation parameter is low for a level close to the given cell.

Matching subcarrier power in a broadband network collocated with a narrowband network

The invention concerns a method for scheduling frequency channels implemented in a device for a narrowband radiocommunication system sharing with a broadband radiocommunication system, each comprising a narrowband base station and a broadband base station, and the same frequency band, the frequency band being in part divided into a given number of frequency blocks, each comprising a given number of carrier frequencies to optionally be allocated to the narrowband base stations. The device comprises a means for associating carrier frequencies with the narrowband base stations and a means for distributing over the frequency band the carrier frequencies associated with the narrowband base stations such that each frequency block comprises at least two distinct groups of carrier frequencies, each associated with a different base station, the two groups of carrier frequencies being selected according to a distribution rule such that interference relating to the emission of the base stations associated with groups of carrier frequencies distributed in the same frequency block have a minimum interfered surface area.

Growing community of inventors

Boulogne Billancourt, France

Vincent Seguy