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HARQ process number management for downlink carrier aggregation

  • US 8,942,190 B2
  • Filed: 03/12/2010
  • Issued: 01/27/2015
  • Est. Priority Date: 03/16/2009
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • starting, by a user agent supporting multiple carriers in a wireless communication network, a timer;

    monitoring, by the user agent, a physical downlink control channel (PDCCH) of at least two assigned carriers of the multiple carriers, the at least two assigned carriers being rendered active by an access device in the network;

    determining, by the user agent, whether a downlink control information (DCI) packet has been received on any of the at least one assigned carrier; and

    if a DCI packet has been received on any of the at least two assigned carriers, restarting the timer; and

    determining a hybrid automatic repeat request (HARQ) process index (HPI) based on the received DCI packet;

    identifying a downlink resource based on the received DCI packet;

    receiving a downlink transmission using the identified downlink resource; and

    associating the received downlink transmission with a buffer corresponding to a combination of the HPI and the assigned carrier on which the downlink transmission was received.

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