Mobile station apparatus and random access method

  • US 8,411,557 B2
  • Filed: 12/21/2011
  • Issued: 04/02/2013
  • Est. Priority Date: 03/20/2006
  • Status: Active Grant
First Claim
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1. A mobile station apparatus comprising:

  • a receiving unit configured to receive control information;

    a selecting unit configured to randomly select a sequence from a plurality of sequences contained in one group of a plurality of groups, into which a predetermined number of sequences that are generated from a plurality of base sequences are grouped and which are respectively associated with different amounts of data or reception qualities, wherein the predetermined number of sequences are grouped by partitioning the predetermined number of sequences, in which sequences generated from the same base sequence and having different cyclic shifts are arranged in an increasing order of the cyclic shifts; and

    a transmitting unit configured to transmit the selected sequence,wherein a position at which the predetermined number of sequences are partitioned is determined based on the control information, and a number of sequences contained in each of the plurality of groups varies in accordance with the control information.

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