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Downstream time domian based adaptive modulation for DOCSIS based applications

  • US 20040085976A1
  • Filed: 12/12/2002
  • Published: 05/06/2004
  • Est. Priority Date: 11/06/2002
  • Status: Active Grant
First Claim
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1. A method of adaptively controlling the throughput rate of data traffic destined for each of a plurality of receivers, the data traffic combined into a single data stream and transmitted over a single downstream channel, said method comprising:

  • assigning data traffic for each of the receivers to a throughput rate based on downstream signal quality information for each of the receivers;

    associating each of a plurality of packet queues with one of the plurality of throughput rates, establishing a plurality of profiles for each of the packet queues, each of the profiles comprising a modulation type and an error correction encoding rate that supports the throughput rate;

    parsing the data stream into the plurality of packet queues based on said assigning;

    modulating and encoding the parsed data traffic in each of the packet queues in accordance with the associated profile; and

    transmitting the modulated and encoded data traffic from each of the packet queues over the downstream channel.

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