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Optical line terminal for managing link status of optical network units and gigabit ethernet passive optical network employing same

  • US 20050158048A1
  • Filed: 06/16/2004
  • Published: 07/21/2005
  • Est. Priority Date: 01/20/2004
  • Status: Abandoned Application
First Claim
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1. An optical line terminal (OLT) for managing link status of optical network units (ONUs), comprising:

  • an optical transmitter for transmitting to said ONUs information regarding data transmission periods allocated to said ONUs during a specified window period;

    an optical receiver for receiving a report signal and data signal from each of said ONUs in each of said allocated data transmission periods, said report signal containing bandwidth allocation request information;

    a link status discriminator for determining whether said report signal is received by said optical receiver, identifying a specific one of said ONUs having sent said report signal if said report signal is received, determining whether said data signal is sent from said identified ONU said data transmission periods allocated to said identified ONU, and determining a link status of said specific ONU in accordance with the combined received signal and data signal determination; and

    a network management unit for performing an operation based on said determined link status of said specific ONU.

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