Indoor positioning appears to be a real challenging topic and many techniques have been proposed these last ten years, ranging from High-Sensitivity GNSS to sensor networks, through Assisted-GNSS or WLAN based approaches. No ultimate solution seems yet to provide the answer to the problem, probably crucial to Location Based Services, of continuity of the availability of the positioning from outdoors (where GNSS are such good candidates) to indoors. Current works are mainly oriented towards hybridisation techniques. The repeater approach is based on the use of GNSS so-called repeaters in order to provide GNSS availability indoors through the way of an amplification of the signals received by an outdoor antenna (typically located on the roof). The complete system, already presented in previous conferences, uses four repeaters in order to provide a full 3D 1 to 2 meter accuracy positioning, indoors. The measurements, performed at the receiver end, are the pseudo-ranges at the instant of transition from one repeater to the next, the transmission being achieved through a sequential scheme (only one repeater transmitting at any given time). Since regulations tend to be provided (ECC reports on maximum transmitted power allowed) for both repeaters and pseudolites, we carried out indoor propagation simulations, for real environments, in order to define realistic deployments of both systems. Different buildings have been considered and modelled. Coverage and positioning accuracy results are presented for various hypotheses: full 3D (3D positioning all over the building), 2.5D (2D positioning all over the building and 3D provided only where floor level changes are possible, i.e. near the stairs and near the lifts) and only 2D (assuming the floor level is available through another mean). The number of repeaters/pseudolites required for a complete coverage of the buildings is also given and commented (the specific case of the Institut Telecom campus in France is analysed)