US 9,813,263 B2
Terminal device, wireless transmission method, base station device, and channel estimation method
Takashi Iwai, Ishikawa (JP); Daichi Imamura, Beijing (CN); Akihiko Nishio, Osaka (JP); Yoshihiko Ogawa, Kanagawa (JP); and Kazuki Takeda, Kanagawa (JP)
Assigned to Panasonic Intellectual Property Group of America, Torrance, CA (US)
Appl. No. 14/378,071
Filed by Panasonic Intellectual Property Corporation of America, Torrance, CA (US)
PCT Filed Feb. 22, 2013, PCT No. PCT/JP2013/001005
§ 371(c)(1), (2) Date Aug. 11, 2014,
PCT Pub. No. WO2013/132773, PCT Pub. Date Sep. 12, 2013.
Claims priority of application No. 2012-052854 (JP), filed on Mar. 9, 2012.
Prior Publication US 2015/0009847 A1, Jan. 8, 2015
Int. Cl. H04J 1/16 (2006.01); H04L 25/02 (2006.01); H04J 13/22 (2011.01); H04J 11/00 (2006.01); H04J 13/00 (2011.01); H04B 7/024 (2017.01); H04L 5/00 (2006.01); H04L 25/03 (2006.01); H04B 7/0452 (2017.01); H04W 84/04 (2009.01)
CPC H04L 25/024 (2013.01) [H04B 7/024 (2013.01); H04J 11/005 (2013.01); H04J 13/0062 (2013.01); H04J 13/22 (2013.01); H04L 5/0048 (2013.01); H04L 25/0204 (2013.01); H04B 7/0452 (2013.01); H04L 5/001 (2013.01); H04L 2025/03426 (2013.01); H04W 84/042 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A terminal apparatus comprising:
generating circuitry, which, in operation:
selects, when coordinated-reception by a plurality of base stations is not applied to the terminal apparatus, a first reference signal sequence, determined from a first selection reference value, among a plurality of reference signal sequences, as a non-coordinated-reception reference signal sequence, the first selection reference value corresponding to a first sequence group number of a first sequence group assigned to a cell to which the terminal apparatus belongs among a plurality of selection reference values, the first selection reference value being a ratio between a value corresponding to the first sequence group number and a sequence length of a reference signal sequence of a minimum transmission bandwidth in the first sequence group;
selects, when coordinated-reception by the plurality of base stations is applied to the terminal apparatus, a second reference signal sequence, determined from one or a plurality of second selection reference values different from the first selection reference value, among the plurality of reference signal sequences, as a coordinated-reception reference signal sequence different from the non-coordinated-reception reference signal sequence, the second selection reference values being values set between two selection reference values which are adjacent to each other, the second selection reference values corresponding to a second sequence group number of a second sequence group assigned specifically to the terminal apparatus; and
generates a reference signal based on the selected reference signal sequence; and
a transmitter coupled to the generating circuitry and operation, transmits the generated reference signal.