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Optical switch for radio access network

  • US 10,085,077 B2
  • Filed: 04/28/2014
  • Issued: 09/25/2018
  • Est. Priority Date: 04/28/2014
  • Status: Active Grant
First Claim
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1. A switch configured to connect a plurality of remote radio units with a plurality of main units in a radio access network, the switch comprising:

  • a first stage comprising one or more first units configured to receive a signal originating from a remote radio unit, and configured to output one or more spectral components having one or more optical wavelengths, wherein the one or more first units are configured to optionally time or packet multiplex signals from the remote radio units, wavelength division multiplex selected wavelengths and transmit the selected wavelengths to a central stage;

    the central stage configured to receive the one or more optical wavelengths, and transfer the one or more spectral components to an output port determined by the one or more optical wavelengths; and

    a second stage comprising one or more second units configured to receive the one or more spectral components from the central stage and output a signal towards a main unit, wherein the one or more second units are further configured to receive the one or more optical wavelengths from the central stage, wavelength division demultiplex the one or more optical wavelengths, and optionally time or packet demultiplex signals and then transmit the signals to the main unit,wherein the one or more first units are configured to control the one or more optical wavelengths of the one or more spectral components such that the one or more spectral components are transferred by the central stage to a selected one of said second units.

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