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Allocating orthogonal frequency-division multiple access (OFDMA) resources in data over cable services interface specification (DOCSIS) networks

  • US 9,444,594 B2
  • Filed: 04/22/2014
  • Issued: 09/13/2016
  • Est. Priority Date: 04/22/2013
  • Status: Active Grant
First Claim
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1. A Cable Modem Termination System (CMTS) comprising:

  • a receiver configured to receive a plurality of upstream transmission request messages from a plurality of coaxial units via an electro-optical network, wherein the upstream transmission request messages each request permission to transmit a specified amount of data;

    a processor coupled to the receiver and configured to allocate Orthogonal Frequency-Division Multiplexing (OFDM) minislots to each coaxial unit based on the amount of data requested in the associated upstream transmission request message; and

    a transmitter coupled to the processor and configured to transmit at least one uplink allocation map (UL-MAP) message to indicate minislot allocations to the coaxial units,wherein all OFDM minislots in an allocation for a first of the coaxial units comprise a common bit loading capacity.

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