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Discontinuous reception operation for licensed-assisted access

  • US 10,292,202 B2
  • Filed: 08/07/2017
  • Issued: 05/14/2019
  • Est. Priority Date: 04/10/2015
  • Status: Active Grant
First Claim
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1. A method for operating a Discontinuous Reception, DRX, function at a user equipment, wherein the user equipment is configured with at least one licensed cell and at least one unlicensed cell and operates the DRX function, the method being performed by the user equipment, the method comprising:

  • receiving, from a radio base station, a DRX-active instruction to be in DRX Active Time at least on the unlicensed cell until receiving the next downlink control information related to a downlink data transmission to be received via the unlicensed cell; and

    in response to receiving the DRX-active instruction, being in DRX Active Time at least on the unlicensed cell, comprising continuously monitoring a downlink control channel for downlink control information until receiving the next downlink control information related to the downlink data transmission to be received via the unlicensed cell,wherein the DRX-active instruction is included in a control element of a Medium Access Control, MAC, protocol,wherein the MAC control element comprises a predetermined identification value indicating that the MAC control element is the DRX-active instruction,wherein the DRX-active instruction is included in downlink control information, DCI, transmitted on the downlink control channel, andwherein the DCI is of the 3rd Generation Partnership Project, 3GPP, DCI Format 1A and comprises information such that the DCI;

    is processed by the user equipment as an instruction to perform a random access procedure on a licensed cell when comprising an identification of this licensed cell, andis processed by the user equipment as the DRX-active instruction when comprising an identification of the unlicensed cell.

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