Staggered sectorization for terrestrial reuse of satellite frequencies
First Claim
Patent Images
1. A satellite radiotelephone system comprising:
- a space-based component configured to provide communications using frequencies of a satellite frequency band; and
a plurality of ancillary terrestrial components configured to provide communications over a service region using at least one first frequency of the satellite frequency band in a sectorization pattern that is spatially staggered between ancillary terrestrial components, wherein the space-based component excludes communications using the at least one first frequency over the service region and an aggregate power radiated by the plurality of ancillary terrestrial components at the at least one first frequency in any direction is less than a total power radiated by the plurality of ancillary terrestrial components at the at least one first frequency;
wherein the sectorization pattern is spatially staggered so that each one of the plurality of ancillary terrestrial components transmits the at least one first frequency in a respective different direction.
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Abstract
A satellite radiotelephone system can include a space-based component and a plurality of ancillary terrestrial components. The space-based component is configured to provide wireless radiotelephone communications over a satellite radiotelephone frequency band. The plurality of ancillary terrestrial components are configured to terrestrially reuse at least one of the satellite radiotelephone frequencies, at least some of the ancillary terrestrial components terrestrially reusing the at least one of the satellite radiotelephone frequencies in a staggered sectorization. Related methods are also discussed.
146 Citations
46 Claims
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1. A satellite radiotelephone system comprising:
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a space-based component configured to provide communications using frequencies of a satellite frequency band; and a plurality of ancillary terrestrial components configured to provide communications over a service region using at least one first frequency of the satellite frequency band in a sectorization pattern that is spatially staggered between ancillary terrestrial components, wherein the space-based component excludes communications using the at least one first frequency over the service region and an aggregate power radiated by the plurality of ancillary terrestrial components at the at least one first frequency in any direction is less than a total power radiated by the plurality of ancillary terrestrial components at the at least one first frequency; wherein the sectorization pattern is spatially staggered so that each one of the plurality of ancillary terrestrial components transmits the at least one first frequency in a respective different direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A satellite radiotelephone system comprising:
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a space-based component that is configured to provide communications using frequencies of a satellite frequency band; and a plurality of ancillary terrestrial components comprising a plurality of frequency reuse clusters, wherein a first frequency reuse cluster transmits at least one first frequency of the satellite frequency band in a first direction and a second frequency reuse cluster transmits the at least one first frequency of the satellite frequency band in a second direction that is different than the first direction, wherein the space-based component excludes communications using the at least one first frequency over a service region that includes the plurality of ancillary terrestrial components and an aggregate power radiated by the plurality of ancillary terrestrial components at the at least one first frequency in any direction is less than a total power radiated by the plurality of ancillary terrestrial components at the at least one first frequency. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A method of operating a satellite radiotelephone system, the method comprising:
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providing communications from a space-based component using frequencies of a satellite frequency band; and providing communications from a plurality of ancillary terrestrial components over a service region using at least one first frequency of the satellite frequency band in a sectorization pattern that is spatially staggered between ancillary terrestrial components, wherein the space-based component excludes communications using the at least one first frequency over the service region and an aggregate power radiated by the plurality of ancillary terrestrial components at the at least one first frequency in any direction is less than a total power radiated by the plurality of ancillary terrestrial components at the at least one first frequency; wherein the sectorization pattern is spatially staggered so that each one of the plurality of ancillary terrestrial components transmits the at least one first frequency in a respective different direction. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of operating a satellite radiotelephone system, the method comprising:
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providing communications from a space-based component using frequencies of a satellite frequency band; and providing communications from a plurality of ancillary terrestrial components comprising a plurality of frequency reuse clusters, wherein a first frequency reuse cluster transmits at least one first frequency of the satellite frequency band in a first direction and a second frequency reuse cluster transmits the at least one first frequency of the satellite frequency band in a second direction that is different than the first direction, wherein the space-based component excludes communications using the at least one first frequency over a service region that includes the plurality of ancillary terrestrial components and an aggregate power radiated by the plurality of ancillary terrestrial components at the at least one first frequency in any direction is less than a total power radiated by the plurality of ancillary terrestrial components at the at least one first frequency. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36)
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37. A radiotelephone system comprising:
a plurality of terrestrial components comprising a plurality of frequency reuse clusters, at least one terrestrial component of each frequency reuse cluster comprising a plurality of directional sectors, wherein at least a first and second frequency reuse clusters provide communications by transmitting at least one first frequency of a satellite frequency band in respective first and second different directions, a space-based component provides communications using frequencies of the satellite frequency band and excludes communications using the at least one first frequency over a service region that includes the plurality of terrestrial components and wherein an aggregate power radiated by the plurality of terrestrial components at the at least one first frequency in any direction is less than a total power radiated by the plurality of terrestrial components at the at least one first frequency. - View Dependent Claims (38, 39, 40, 41, 42)
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43. A method of operating a radiotelephone system, the method comprising:
using a radiotelephone frequency by a plurality of terrestrial components to provide radiotelephone communications wherein the plurality of terrestrial components comprises a plurality of frequency reuse clusters with at least one terrestrial component of each frequency reuse cluster transmitting from a plurality of directional sectors and wherein a first frequency reuse cluster transmits the radiotelephone frequency in a first direction and a second frequency reuse cluster transmits the radiotelephone frequency in a second direction that is randomly oriented relative to the first direction, wherein the radiotelephone frequency used by the plurality of frequency reuse clusters is within a band of satellite frequencies transmitted by a space-based component and wherein the first and second directions are different.
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44. A method of providing communications comprising:
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using a radiotelephone frequency by a plurality of terrestrial components to provide radiotelephone communications for a plurality of terminals; and randomizing use of the radiotelephone frequency by the plurality of terrestrial components, wherein the radiotelephone frequency used among the plurality of terrestrial components is within a band of satellite frequencies associated with a space-based component wherein randomizing use of the radiotelephone frequency comprises randomizing a direction of use of the radiotelephone frequency so that each of the plurality of ancillary terrestrial components transmits the radiotelephone frequency in a respective different direction.
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45. A communications system comprising:
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means for using a radiotelephone frequency among a plurality of terrestrial components to provide radiotelephone communications for a plurality of mobile terminals; and means for randomizing use of the radiotelephone frequency among the plurality of terrestrial components, wherein the radiotelephone frequency is used by terrestrial components to provide down-link communications, and wherein the radiotelephone frequency used among the plurality of terrestrial components is within a band of satellite frequencies associated with a space-based component wherein the means for randomizing use of the radiotelephone frequency comprises means for randomizing a direction of use of the radiotelephone frequency so that each of the plurality of ancillary terrestrial components transmits the radiotelephone frequency in a respective different direction. - View Dependent Claims (46)
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Specification