Low earth orbit distributed gateway communication system

H - Electricity – 04 – B

Patent

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Details

H04B 7/185 (2006.01) H04B 7/195 (2006.01) H04Q 7/24 (2006.01)

Patent

CA 2231692

Disclosed is a communication system and methods for operating the communication system of a type that includes a satellite communication system segment comprised of at least one satellite that projects a plurality of beams on the surface of the earth. The satellite communication system segment further includes at least one terrestrial satellite gateway that is bidirectionally coupled to the at least one satellite and also to a terrestrial communications system. In the communication system one or more beams from one or more satellites at the surface of the earth define a regional service area within which at least one Wireless Local Loop (WLL) service region is located. The communication system further includes a terrestrial communication segment comprised of at least one WLL base station capable of bidirectional communications with a plurality of WLL user terminals within the WLL service region. The terrestrial segment further includes a virtual gateway that is bidirectionally coupled to the WLL base station and to the at least one satellite. The virtual gateway is responsive to the terrestrial satellite gateway for temporarily assuming control of satellite system resources for bidirectionally coupling a communication to or from an individual one of the WLL user terminals into or out of the WLL service region. The virtual gateway can also transmit at least one of paging and broadcast messages to WLL user terminals. The paging and broadcast messages are first received by the virtual gateway from the terrestrial satellite gateway via the at least one satellite.

Système et méthodes de communication permettant d'exploiter un système de transmission ayant un secteur de communication par satellite composé d'au moins un satellite projetant un certain nombre de faisceaux à la surface de la Terre. En outre, le secteur de communication par satellite comprend au moins une passerelle de satellite de Terre couplée bidirectionnellement au(x) satellite(s) et à un système de communication de Terre. Dans le système de transmission, un ou plusieurs faisceaux provenant d'un ou de plusieurs satellites définissent à la surface de la Terre une zone de service régionale englobant au moins une région de service WLL (Wireless Local Loop). En outre, le système de transmission comprend un secteur de communication de Terre composé d'au moins une station de base WLL capable de communiquer dans les deux sens avec un certain nombre de terminaux utilisateurs WLL de la région de service WLL. Le secteur de Terre comprend également une passerelle virtuelle couplée bidirectionnellement à la station de base WLL et au(x) satellite(s). La passerelle virtuelle répond à la passerelle de satellite de Terre pour la commande temporaire des ressources du système à satellite aux fins de l'établissement d'une communication bidirectionnelle à destination ou en provenance d'un des terminaux utilisateurs WLL de la région de service WLL. Elle peut aussi transmettre aux terminaux utilisateurs WLL des messages de téléappel et des messages diffusés. Les messages de téléappel et diffusés sont d'abord reçus par la passerelle virtuelle à partir de la passerelle de satellite de Terre au moyen du ou des satellites.

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