Power division multiple access
First Claim
Patent Images
1. A method comprising:
- determining, by a hub for one or more carriers included in a predetermined bandwidth, one or more maximum power limits corresponding to the one or more carriers;
calculating a total sum of the one or more maximum power limits corresponding to the one or more carriers;
dimensioning a total power from a satellite for supporting the one or more carriers to obtain a dimensioned total power that is less than the total sum of the one or more maximum power limits; and
enforcing the dimensioned total power, wherein the enforcing comprises;
determining a target power corresponding to a first carrier;
determining that there is insufficient power under a power limitation corresponding to the predetermined bandwidth for supporting the first carrier at the target power and one or more additional carriers at maximum power limits that were previously determined;
determining that at least one additional carrier among the one or more additional carriers is to have its maximum power limit reduced based on a symbol energy to noise ratio associated with the at least one additional carrier;
determining at least one temporary maximum power limit for the at least one additional carrier, wherein the at least one temporary maximum power limit is less than a corresponding maximum power limit of a corresponding carrier;
determining that there is sufficient power under the power limitation corresponding to the predetermined bandwidth for supporting the first carrier at the target power and the one or more additional carriers considering the at least one temporary maximum power limit;
replacing the maximum power limit for the at least one additional carrier with the at least one temporary maximum power limit; and
allocating the target power to the first carrier.
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Accused Products
Abstract
A satellite communication system includes a hub and one or more terminals, wherein the one or more terminals may be configured to communicate over a satellite with the hub using a segment of the satellite'"'"'s resources and using a single channel per carrier (SCPC) access scheme. Methods are presented herein for facilitating the dimensioning of at least a power characteristic of said space segment using a Demand Assignment Multiple Access approach and for enforcing the dimensioned power characteristic in real-time, or substantially in real-time. Also presented are methods for allocating power to SCPC carriers, wherein a maximum power level for a carrier may be determined using a DAMA technique.
11 Citations
11 Claims
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1. A method comprising:
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determining, by a hub for one or more carriers included in a predetermined bandwidth, one or more maximum power limits corresponding to the one or more carriers; calculating a total sum of the one or more maximum power limits corresponding to the one or more carriers; dimensioning a total power from a satellite for supporting the one or more carriers to obtain a dimensioned total power that is less than the total sum of the one or more maximum power limits; and enforcing the dimensioned total power, wherein the enforcing comprises; determining a target power corresponding to a first carrier; determining that there is insufficient power under a power limitation corresponding to the predetermined bandwidth for supporting the first carrier at the target power and one or more additional carriers at maximum power limits that were previously determined; determining that at least one additional carrier among the one or more additional carriers is to have its maximum power limit reduced based on a symbol energy to noise ratio associated with the at least one additional carrier; determining at least one temporary maximum power limit for the at least one additional carrier, wherein the at least one temporary maximum power limit is less than a corresponding maximum power limit of a corresponding carrier; determining that there is sufficient power under the power limitation corresponding to the predetermined bandwidth for supporting the first carrier at the target power and the one or more additional carriers considering the at least one temporary maximum power limit; replacing the maximum power limit for the at least one additional carrier with the at least one temporary maximum power limit; and allocating the target power to the first carrier. - View Dependent Claims (2, 3, 4, 5, 6, 11)
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7. A hub in a satellite communication system comprising one or more terminals, the hub configured to:
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determine one or more maximum power limits corresponding to one or more carriers, wherein a maximum power limit corresponds to a maximum ES/N0 level at which a corresponding carrier is allowed to be received at the hub; transmit a particular maximum power limit, among the one or more maximum power limits, that corresponds to a particular carrier to a particular terminal, among the one or more terminals, that transmits the particular carrier; take one or more ES/N0 measurements of the one or more carriers; and transmit a particular measurement of the particular carrier, among the one or more ES/N0 measurements, to the particular terminal that transmits the particular carrier; determine a target power corresponding to the particular carrier; determine that there is insufficient power under a power limitation corresponding to a predetermined bandwidth for supporting the particular carrier at the target power and one or more additional carriers at maximum power limits that were previously determined; determine that at least one additional carrier among the one or more additional carriers is to have its maximum power limit reduced based on a symbol energy to noise ratio associated with the at least one additional carrier; determine at least one temporary maximum power limit for the at least one additional carrier, wherein the at least one temporary maximum power limit is less than a corresponding maximum power limit of a corresponding carrier; determine that there is sufficient power under the power limitation corresponding to the predetermined bandwidth for supporting the particular carrier at the target power and the one or more additional carriers considering the at least one temporary maximum power limit; replace the maximum power limit for the at least one additional carrier with the at least one temporary maximum power limit; and allocate the target power to the particular carrier. - View Dependent Claims (8, 9, 10)
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Specification