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Control channel signaling and acquisition for carrier aggregation

  • US 9,094,957 B2
  • Filed: 02/26/2014
  • Issued: 07/28/2015
  • Est. Priority Date: 10/20/2008
  • Status: Active Grant
First Claim
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1. A method implemented by a wireless transmit/receive unit (WTRU), the method comprising:

  • receiving a first radio resource control (RRC) message comprising carrier aggregation information, the carrier aggregation information comprising an indication that downlink control information for downlink transmissions on a first component carrier will be received via a second component carrier, wherein the WTRU receives, via the second component carrier, an indication of which orthogonal frequency division multiplexing (OFDM) symbols of a subframe include a physical downlink shared channel (PDSCH) region for the WTRU to decode the downlink transmissions on the first component carrier;

    receiving a physical downlink control channel (PDCCH) transmission on the second component carrier, wherein the PDCCH transmission comprises a downlink grant and an index indicating which component carrier is to be used for carrying a physical downlink shared channel (PDSCH) transmission associated with the downlink grant;

    determining the PDSCH transmission is to be received on the first component carrier based on the index included in the PDCCH transmission received on the second component carrier; and

    receiving the PDSCH transmission on the first component carrier in accordance with the downlink grant included in the PDCCH transmission received on the second component carrier.

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