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Determining base station fronthaul transmission control based on loopback signal

  • US 10,455,496 B2
  • Filed: 10/06/2016
  • Issued: 10/22/2019
  • Est. Priority Date: 10/21/2015
  • Status: Active Grant
First Claim
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1. An apparatus for a base band unit of a base station transceiver of a mobile communication system, the base station transceiver further comprising one or more radio units configured to wirelessly communicate with the base band unit using one or more wireless fronthaul links, the apparatus comprising:

  • at least one output configured to transmit a downlink component of the one or more wireless fronthaul links to the one or more radio units;

    at least one input configured to receive an uplink component of the one or more wireless fronthaul links from the one or more radio units; and

    a control module configured to;

    control the at least one output and the at least one input,transmit a reference signal via the at least one output to the one or more radio units,receive a loopback version of the reference signal via the at least one input from the one or more radio units,determine information related to a per-radio unit transmission power to be used by the one or more radio units for transmissions on the one or more wireless fronthaul links using an attenuation of the reference signal determined based on the loopback version of the reference signal,determine transmission control information comprising the information related to the per-radio unit transmission power, andprovide the transmission control information to the one or more radio units via the at least one output;

    wherein the control module is configured to determine the per-radio unit transmission power based on an estimated interference and an estimated path loss, wherein the control module is configured to estimate the path loss based on the reference signal and the loopback version of the reference signal; and

    wherein the control module is configured to determine the per-radio unit transmission power based on an optimization function, wherein the control module is configured to determine the per-radio unit transmission power such that a target Signal-to-Interference and Noise (SINR) for the uplink component is approximated based on

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