Satellite communication system for communicating packet data messages
First Claim
Patent Images
1. A satellite communication system for communicating between a plurality of user terminals comprising:
- at least one satellite which provides multiple beams;
a plurality of user terminals that communicate with each other, a public switched telephone network (PSTN), or a data network, via the at least one satellite;
at least one gateway communicating with at least one user terminal over the at least one satellite wherein each of said user terminals within a given frequency band is distinguished from another of said user terminals employing orthogonal codes employed on forward channel transmissions; and
wherein said user terminals are equipped to initiate or receive or terminate packet data messages;
wherein each of said plurality of user terminals is handed off from one beam of said at least one satellite to another beam of said at least one satellite; and
wherein said hand off is predicated on signal strength determined at said plurality of user terminals.
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Abstract
A satellite communication system is disclosed which provides at least one satellite employing multiple beams to a plurality of user terminals. A gateway is employed to connect to either a PSTN or an Internet communicating with the user terminal over the system so that the users within a given frequency range are distinguished one from the other employing orthogonal codes. The user terminal has the capability of either initiating or receiving packet data messages.
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Citations
14 Claims
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1. A satellite communication system for communicating between a plurality of user terminals comprising:
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at least one satellite which provides multiple beams; a plurality of user terminals that communicate with each other, a public switched telephone network (PSTN), or a data network, via the at least one satellite; at least one gateway communicating with at least one user terminal over the at least one satellite wherein each of said user terminals within a given frequency band is distinguished from another of said user terminals employing orthogonal codes employed on forward channel transmissions; and wherein said user terminals are equipped to initiate or receive or terminate packet data messages; wherein each of said plurality of user terminals is handed off from one beam of said at least one satellite to another beam of said at least one satellite; and wherein said hand off is predicated on signal strength determined at said plurality of user terminals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A satellite communication system for communicating between a plurality of user terminals comprising:
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a low earth orbit (LEO) satellite constellation wherein each satellite of said constellation provides multiple beams; a plurality of user terminals that communicate with each other, a public switched telephone network (PSTN), or a data network, via satellites of the constellation; at least one gateway connected to an Internet and communicating with at least one user terminal over the constellation wherein each of said user terminals within a given frequency band is distinguished from another of said user terminals employing orthogonal codes employed on forward channel transmissions; wherein said user terminal can either initiate or receive packet data messages; wherein each of said plurality of user terminals is handed off from one beam of a satellite to another beam of said satellite; and wherein said hand off is predicated on signal strength determined at said plurality of user terminals. - View Dependent Claims (10)
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11. A satellite communication system for communicating between a plurality of user terminals comprising:
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a low earth orbit (LEO) satellite constellation wherein each satellite of said constellation provides multiple beams; a plurality of user terminals that communicate with each other, a public switched telephone network (PSTN), or a data network, via satellites of the constellation; at least one gateway connected to a PSTN and an Internet communicating with said at least one user terminal over the constellation wherein each of said user terminals within a given frequency band is distinguished from another of said user terminals employing orthogonal codes employed on forward channel transmissions; wherein said user terminal is equipped to initiate or receive packet data messages; wherein each of said plurality of user terminals is handed off from one beam of a satellite to another beam of said satellite; and wherein said hand off is predicated on signal strength determined at said plurality of user terminals. - View Dependent Claims (12)
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13. A satellite communication system for communicating between a plurality of user terminals comprising:
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a medium earth orbit (MEO) satellite constellation wherein each satellite of said constellation provides multiple beams; a plurality of user terminals that communicate with each other, a public switched telephone network (PSTN), or a data network, via satellites of the constellation; at least one gateway connected to an Internet and communicating with said at least one user terminal over the constellation wherein each of said user terminals within a given frequency band is distinguished from another of said user terminals employing orthogonal codes employed on forward channel transmissions; wherein said user terminal can either initiate or receive packet data messages; wherein each of said plurality of user terminals is handed off from one beam of a satellite to another beam of said satellite; and wherein said hand off is predicated on signal strength determined at said plurality of user terminals. - View Dependent Claims (14)
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Specification