US 8,139,473 B2 · Radio communication mobile station apparatus and radio communication method

Abstract

Provided is a mobile station capable of effectively reporting control information in RACH. In the mobile station, a signature selection unit (111) selects one of different code sequences as a signature according to inputted control information and a modulation unit (112) modulates a signature (code sequence). In a table provided in the signature selection unit (111), for control information ‘000’, CAZAC sequence #1 as a basic code sequence and a derived code sequence of shifts 0 to 7 derived from the CAZAC sequence #1 are set while being correlated to each other. The derived code sequence of shifts 0 to 7 of the CAZAC sequence #1 respectively correspond to signatures #1 to #8. Moreover, for control information ‘001’, CAZAC sequence #2 as a basic code sequence and a derived code sequence of shifts 0 to 7 derived from CAZAC sequence #2 are set while being correlated to each other. The derived code sequence of shifts 0 to 7 of the CAZAC sequence #2 respectively correspond to the signatures #9 to #16.

Claims15

Dependent claims

A mobile station apparatus comprising:

a selecting unit configured to randomly select a sequence from a group of sequences, the group corresponding to an amount of data and a reception quality, wherein a plurality of sequences generated from a plurality of base sequences are grouped into a plurality of groups, which are respectively associated with both different amounts of data and different reception qualities, such that each group provides an indication of an amount of data and a reception quality and that those sequences that are generated from the same base sequence are first included in a predetermined number of the sequences contained in the same group;
and
a transmitting unit configured to transmit the selected sequence,
wherein the plurality of sequences generated from the plurality of base sequences are grouped into the plurality of groups, such that all of sequences that are generated from one of the base sequences and at least one of sequences that are generated from another of the base sequences are included in the predetermined number of the sequences contained in the same group.

1 more element

Dependencies are inferred from the claim text.

Radio communication mobile station apparatus and radio communication method

Life of this patent

Radio communication mobile station apparatus and radio communication method

Life of this patent

Abstract

Claims15