Alcatel Lucent

Alcatel

Worldspace Management Corporation

Thales

Etienne Dunas

Philippe Roghi

Ernst Eberlein

S Joseph Campanella

Olivier Courseille

Bernard Charlot

Stefan Meltzer

Bruno Lobert

System and a method for timely interconnecting elements of a wide spread remote measurement, monitoring or data collection system through multiplexing in a satellite system. The invention provides multiplexing features of a satellite system using on-board processing features to gather data from a plurality of remote monitoring stations () on any global navigation reference time and multiplex them into a single stream towards one or more computation centers. Each of said computation centers () has a down-link adapter () capable of extracting a channel from a down-link transmission of a satellite. The data from each of said remote monitoring stations () is also passed through an up-link adapter () so as to make it suitable for uplink transmission towards a DDBS satellite. Up-link and down-link adapters can be interconnected together to enable loop-back of information such as timing data to monitor transit times.

System and method for real-time interconnection of elements of a wide area monitoring, measurement or data collection system through a direct digital satellite broadcasting multiplexing system

The invention relates to a data server () used in a system () for supplying complementary data, so-called augmentation data, for satellite navigation signals. The inventive server () is especially adapted to be used with elements that are compatible with those used in EGNOS technology (European Geostationary Navigation Overlay Service). Said system () for supplying augmentation data for the satellite navigation signals comprises at least one calculator () for the determination of said augmentation data, said augmentation data being determined from data transmitted by at least one receiving station (S. . . SON) receiving navigation information sent by means of at least one satellite. Said server () comprises a first inlet () for receiving the augmentation data transmitted by the calculator (), a first outlet () for transmitting the augmentation data towards at least one user (U. . . UOK), and a second outlet () for re-emitting the augmentation data towards the calculator () with a delay that is pre-determined in relation to the reception at the first inlet ().

Data server used in a system for supplying augmentation data for the satellite navigation signals

A system and a method for augmentation of satellite positioning systems wherein a monitoring ground station (MGS) is connected to a computer center in charge of determining the level of error of a satellite (NS) broadcasting positioning signals, and transmitting navigation correction data to a mobile user. The transmission is performed using a digital satellite system using at least one digital satellite (DS) capable of broadcasting multiplexed data in down-link transmission to a user station (U). The user station (U) de-multiplexes and retrieves the navigation correction data from said digital satellite down-link transmission by way of a frame adapter () connected to a satellite receiver (). Specific data such as time or GNSS almanacs are replicated under specific format and put into specific parts of a signaling channel to enable time broadcast to standard receivers of a DS system, and to speed-up acquisition of GNSS satellite signal by standard GNSS receivers possibly in use in the U station. A method is also disclosed for broadcasting time with a reasonable accuracy.

System and method for augmentation of satellite positioning systems

A satellite direct radio broadcast system is provided which assembles bits of broadcast programs into prime rate increments, several of which are assembled into a frame. Frames are divided into symbols which are demultiplexed into alternating ones of a plurality of prime rate channels. The prime rate channels are demultiplexed onto a corresponding number of broadcast frequencies for transmission to a satellite. The satellite payload switches the symbols into time division multiplexed (TDM) data streams. The receivers process the TDM streams using service control headers (SCHs) provided therein by broadcast stations. The SCHs facilitate transmission of different service components within broadcast channel frames, association of a primary broadcast channel with one or more secondary broadcast channels on a frame-to-frame basis, and the transmission of multiframe bit streams, or auxiliary data throughout a broadcast channel that are independent of a service, in contiguous or non-contiguous frames.

Signaling protocol for satellite direct radio broadcast system

Growing community of inventors

Toulouse, France

Etienne Dunas