Upstream adaptive modulation in a communications system
First Claim
1. An upstream modulation method for a communications system, comprising:
- defining burst parameters associated with a range of data interval usage codes (IUCs);
monitoring signal-to-noise ratio (SNR) and codeword error rates for modems connected to a network; and
dynamically assigning the data IUCs to the modems within an upstream channel according to at least one of the SNR and the codeword error rate to enable each of the modems in the upstream channel to achieve maximum bandwidth efficiency during upstream data transmissions.
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Abstract
A system and method for providing upstream adaptive modulation. Burst parameters associated with a range of data interval usage codes (IUCs) are defined. Each of the data IUCs has a different modulation order and forward error correction (FEC). The SNR and codeword error rate for each satellite modem in the network are monitored. The data IUCs are dynamically assigned to different satellite modems within an upstream channel based on SNR and/or codeword error rate to enable each of the satellite modems in the upstream channel to achieve maximum bandwidth efficiency during upstream data transmissions. Bandwidth requests are received from the satellite modems and granted. The grant includes the assigned data IUC. The data bursts received in the upstream channel are each processed using the parameters from the assigned IUC for each of the satellite modems sending data in the upstream channel. When any of the satellite modems'"'"' SNR and/or codeword error rate changes, the data IUC for that satellite modem is changed accordingly.
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Citations
23 Claims
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1. An upstream modulation method for a communications system, comprising:
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defining burst parameters associated with a range of data interval usage codes (IUCs); monitoring signal-to-noise ratio (SNR) and codeword error rates for modems connected to a network; and dynamically assigning the data IUCs to the modems within an upstream channel according to at least one of the SNR and the codeword error rate to enable each of the modems in the upstream channel to achieve maximum bandwidth efficiency during upstream data transmissions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An upstream modulation system for broadband communications, comprising:
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means for defining burst parameters associated with a range of data interval usage codes (IUCs); means for monitoring signal-to-noise ratio (SNR) and codeword error rates for modems in a network; and means for dynamically assigning the data IUCs to the modems within an upstream channel according to at least one of the SNR and the codeword error rate to enable each of the modems in the upstream channel to achieve bandwidth efficiency during upstream data transmissions. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. An upstream modulation system for broadband communications, comprising:
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means for defining burst parameters associated with a range of data interval usage codes (IUCs); means for monitoring signal-to-noise ratio (SNR) for modems in a network; and means for dynamically assigning the data IUCs to the modems within an upstream channel according to the modem'"'"'s SNR to enable each of the modems in the upstream channel to achieve bandwidth efficiency during upstream data transmissions. - View Dependent Claims (17, 18, 19)
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20. An upstream modulation system for broadband communications, comprising:
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means for defining burst parameters associated with a range of data interval usage codes (IUCs); means for monitoring codeword error rates for modems in a network; and means for dynamically assigning the data IUCs to the modems within an upstream channel according to the codeword error rate to enable each of the modems in the upstream channel to achieve bandwidth efficiency during upstream data transmissions. - View Dependent Claims (21, 22, 23)
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Specification