US 9,814,067 B2
Wireless communication system, base station apparatus, mobile station apparatus, and random access method
Yasuyuki Kato, Osaka (JP); Shohei Yamada, Osaka (JP); and Shoichi Suzuki, Osaka (JP)
Assigned to SHARP KABUSHIKI KAISHA, Osaka (JP)
Appl. No. 13/388,926
Filed by Yasuyuki Kato, Osaka (JP); Shohei Yamada, Osaka (JP); and Shoichi Suzuki, Osaka (JP)
PCT Filed Aug. 3, 2010, PCT No. PCT/JP2010/063121
§ 371(c)(1), (2), (4) Date Mar. 22, 2012,
PCT Pub. No. WO2011/016460, PCT Pub. Date Feb. 10, 2011.
Claims priority of application No. 2009-183032 (JP), filed on Aug. 6, 2009.
Prior Publication US 2012/0172048 A1, Jul. 5, 2012
Int. Cl. H04W 74/08 (2009.01); H04W 74/00 (2009.01); H04L 5/00 (2006.01)
CPC H04W 74/008 (2013.01) [H04L 5/0007 (2013.01); H04L 5/0053 (2013.01); H04W 74/0833 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A base station apparatus comprising:
a scheduling circuitry configured to and/or programmed to:
select one component carrier from among a plurality of component carriers allocated by said base station, apparatus to a mobile station apparatus, a preamble number, and random access channel information, wherein said base station apparatus receives a random access preamble indicated by said preamble number on a random access channel indicated by said random access channel information of said one component carrier, through a non-contention based random access procedure, in a case that at least one predetermined condition including a condition that said preamble number is a dedicated preamble number different from zero is satisfied, and
prepare control data of a physical downlink control channel (PDCCH) (a) causing said mobile station apparatus to perform a random access procedure, (b) including component carrier information constituted by only 3 bits of fixed length, said 3 bits specifying said one component carrier, and (c) including said preamble number, and said random access channel information; and
a radio circuitry configured to and/or programmed to transmit said control data to said mobile station apparatus using any one of the plurality of said component carriers.