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Multi-carrier operation for wireless systems

  • US 8,711,773 B2
  • Filed: 09/02/2010
  • Issued: 04/29/2014
  • Est. Priority Date: 09/05/2008
  • Status: Active Grant
First Claim
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1. A method of a subscriber station (SS) comprising:

  • performing network entry in a multi-carrier wireless environment using a primary carrier;

    receiving timing information corresponding to the primary carrier;

    receiving a first control signaling via the primary carrier, the first control signaling assigning at least one secondary carrier;

    transmitting uplink data via the secondary carrier using an uplink transmission timing of the secondary carrier, the uplink transmission timing of the secondary carrier being assigned the same as an uplink transmission timing of the primary carrier; and

    modifying the uplink transmission timing or frequency of the secondary carrier after transmitting the uplink data via the secondary carrier, wherein modifying the uplink transmission timing or frequency of the secondary carrier after transmitting the uplink data via the secondary carrier comprises;

    measuring a preamble or pilot; and

    determining an adjustment of the uplink transmission timing or frequency of the secondary carrier based on the measurement.

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