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Sounding reference signal transmission

  • US 8,625,524 B2
  • Filed: 08/14/2013
  • Issued: 01/07/2014
  • Est. Priority Date: 01/25/2012
  • Status: Active Grant
First Claim
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1. A method for use in a wireless device, the method comprising:

  • a) receiving at least one message causing configuration of;

    i) a plurality of cells grouped into a plurality of cell groups; and

    ii) transmissions of sounding reference signals (SRSs) on a first cell assigned to a first cell group in said plurality of cell groups;

    b) transmitting a first transmission of said SRSs in parallel with transmission of at least one of;

    i) a first random access preamble in a second cell group different from said first cell group; and

    ii) a first packet on a second cell different from said first cell; and

    c) dropping a second transmission of said SRSs in a symbol if at least one of the following conditions is satisfied;

    i) a second random access preamble is transmitted overlapping said symbol in said first cell group; and

    ii) a second packet is transmitted overlapping said symbol in said first cell; and

    iii) said wireless device has insufficient power to transmit said second transmission in parallel with other uplink transmissions in said plurality of cells.

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