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Scheduling for RF over fiber optic cable [RFoG]

  • US 8,797,854 B2
  • Filed: 09/29/2008
  • Issued: 08/05/2014
  • Est. Priority Date: 09/29/2008
  • Status: Active Grant
First Claim
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1. A Cable Modem Termination System (CMTS) for use in a radio frequency over glass (RFoG) network comprising:

  • a scheduler stored in non-transitory machine-readable media for scheduling upstream bandwidth for cable modems (CMs) via an optical network having optical network units for transmitting upstream channels by the respective cable modems, and at least one optical splitter for optically aggregating the upstream channels;

    wherein the scheduler is arranged to replicate upstream bandwidth allocation grants for all of the upstream channels that are available to the cable modems, ensuring all of the upstream channels are temporally aligned and that no cable modems are scheduled for upstream transmission at the same time, even if on different frequencies, so that the optical network units do not optically interfere with each other relative to the optical aggregation of the upstream channels for avoidance of optical beat interference.

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