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APPARATUS AND METHOD FOR DELAY TIME COMPUTATION AND DELAY COMPENSATION BETWEEN BASE STATION AND REMOTE RADIO FREQUENCY UNIT IN BROADBAND WIRELESS ACCESS SYSTEM

  • US 20100172262A1
  • Filed: 01/07/2010
  • Published: 07/08/2010
  • Est. Priority Date: 01/08/2009
  • Status: Active Grant
First Claim
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1. A method for determining a delay time to compensate for delay between a Base Station (BS) modem card and a remote Radio Frequency (RF) unit in a wireless access system, the method comprising:

  • determining a process delay time required when traffic data is output from the BS modem card to an antenna of the remote RF unit in a state where a reference cable having a length short enough to neglect a cable delay time is connected between the BS modem card and the remote RF unit;

    determining a cable delay time required when a sync pulse signal is transmitted through a cable used in actual system operation between the BS modem card and the remote RF unit; and

    determining a time for outputting traffic data at an earlier time from a modem included in the BS modem card by using the determined process delay time and cable delay time.

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