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Systems and methods of optical path protection for distributed antenna systems

  • US 9,843,391 B2
  • Filed: 07/31/2014
  • Issued: 12/12/2017
  • Est. Priority Date: 04/28/2006
  • Status: Active Grant
First Claim
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1. A distributed antenna system (DAS) comprising:

  • a first node;

    a second node coupled to the first node via a first fiber path and a second fiber path;

    a third node coupled to the second node via a third fiber path and a fourth fiber path,wherein the first node is configured to transmit a first signal over the first fiber path or the second fiber path, and wherein the second node is configured to couple, simultaneously and communicatively, the first fiber path and the second fiber path to the third fiber path such that the first signal from the first node can be sent over the first fiber path or the second fiber path and over the third fiber path to the third node,wherein the third node is configured to transmit a second signal over the fourth fiber path, and wherein the second node is configured to couple, simultaneously and communicatively, the fourth fiber path to the first fiber path and the second fiber path such that the second signal from the third node can be sent over the fourth fiber path and over the first fiber path or the second fiber path to the first node,wherein the first node is configured to obtain information indicative of a signal quality of the first signal, and to switch from the first fiber path to the second fiber path based on the signal quality.

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