SATELLITE TELECOMMUNICATIONS SYSTEM FOR PROVIDING STAR TRAFFIC AND MESH TRAFFIC
First Claim
1. A satellite telecommunications system for providing star traffic and mesh traffic, including a satellite, at least one terrestrial gateway located in a metropolitan coverage area, a global coverage area and a plurality of fixed or mobile user terminals distributed in the global coverage area, a bidirectional radio link between the gateway and the satellite, bidirectional radio links between the satellite and the user terminals, and a telemetry and command link between the gateway and the satellite, wherein the global coverage area is covered by a first set of spots of identical size, which partially overlap and which form a regular cellular network, and by at least a second set of local spots, irregularly distributed in the global coverage area and superimposed geographically on spots of the first set of spots, and wherein the spots of the first set have first allocated frequency bands corresponding to N different channels having the same frequency capacity, where N is an integer greater than 1, said first frequency bands being re-used for different spots of the first set spaced apart from each other, while the local spots of the second set have a second allocated frequency band corresponding to a special channel having an increased frequency capacity, greater than the frequency capacity of the channels of the spots of the first set, the special channel of the second set of spots being different from the channels of the first set of spots.
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Accused Products
Abstract
A satellite telecommunications system has a global coverage area and a plurality of user terminals distributed in the global coverage area. The global coverage area is covered by a first set of spots which form a regular cellular mesh, and by at least a second set of local spots, irregularly distributed and superimposed geographically on spots of the first set. The spots of the first set of spots have allocated channels with the same frequency capacity, the same channel being re-used by a plurality of different spots, and the local spots of the second set of spots have a special allocated channel having an increased frequency capacity.
40 Citations
11 Claims
- 1. A satellite telecommunications system for providing star traffic and mesh traffic, including a satellite, at least one terrestrial gateway located in a metropolitan coverage area, a global coverage area and a plurality of fixed or mobile user terminals distributed in the global coverage area, a bidirectional radio link between the gateway and the satellite, bidirectional radio links between the satellite and the user terminals, and a telemetry and command link between the gateway and the satellite, wherein the global coverage area is covered by a first set of spots of identical size, which partially overlap and which form a regular cellular network, and by at least a second set of local spots, irregularly distributed in the global coverage area and superimposed geographically on spots of the first set of spots, and wherein the spots of the first set have first allocated frequency bands corresponding to N different channels having the same frequency capacity, where N is an integer greater than 1, said first frequency bands being re-used for different spots of the first set spaced apart from each other, while the local spots of the second set have a second allocated frequency band corresponding to a special channel having an increased frequency capacity, greater than the frequency capacity of the channels of the spots of the first set, the special channel of the second set of spots being different from the channels of the first set of spots.
Specification