US 12,356,419 B2
Communication apparatus and communication method for configuring resource region candidates and mapping downlink control information to same
Ayako Horiuchi, Kanagawa (JP); and Akihiko Nishio, Osaka (JP)
Assigned to Sun Patent Trust, New York, NY (US)
Filed by Sun Patent Trust, New York, NY (US)
Filed on May 5, 2022, as Appl. No. 17/737,769.
Application 17/737,769 is a continuation of application No. 16/937,357, filed on Jul. 23, 2020, granted, now 11,356,997.
Application 16/937,357 is a continuation of application No. 16/352,581, filed on Mar. 13, 2019, granted, now 10,764,916, issued on Sep. 1, 2020.
Application 16/352,581 is a continuation of application No. 15/685,752, filed on Aug. 24, 2017, granted, now 10,278,204, issued on Apr. 30, 2019.
Application 15/685,752 is a continuation of application No. 15/370,814, filed on Dec. 6, 2016, granted, now 9,775,167, issued on Sep. 26, 2017.
Application 15/370,814 is a continuation of application No. 15/059,204, filed on Mar. 2, 2016, granted, now 9,554,380, issued on Jan. 24, 2017.
Application 15/059,204 is a continuation of application No. 14/122,585, granted, now 9,313,777, issued on Apr. 12, 2016, previously published as PCT/JP2012/004786, filed on Jul. 27, 2012.
Claims priority of application No. 2011-176855 (JP), filed on Aug. 12, 2011.
Prior Publication US 2022/0264544 A1, Aug. 18, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 72/23 (2023.01); H04L 1/00 (2006.01); H04L 5/00 (2006.01); H04W 72/044 (2023.01); H04W 72/0453 (2023.01); H04W 72/1273 (2023.01); H04W 72/20 (2023.01); H04W 72/543 (2023.01); H04W 88/02 (2009.01)
CPC H04W 72/23 (2023.01) [H04L 1/0006 (2013.01); H04L 1/0046 (2013.01); H04L 5/0007 (2013.01); H04L 5/0053 (2013.01); H04L 5/0055 (2013.01); H04W 72/044 (2013.01); H04W 72/0453 (2013.01); H04W 72/1273 (2013.01); H04W 72/20 (2023.01); H04W 72/543 (2023.01); H04W 88/02 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A communication system comprising:
a communication apparatus; and
a base station,
the communication apparatus comprising:
a receiver which, in operation, receives a signal including downlink control information; and
circuitry which, in operation,
sets a division number used for an Enhanced Physical Downlink Control CHannel (EPDCCH), the division number being a number of Control Channel Elements (CCEs) per resource block pair;
specifies a plurality of resource region candidates by using the division number, each resource region candidate including at least one CCE, wherein the division number is set such that the division number for a subframe having a Normal cyclic prefix length is larger than the division number for a subframe having an Extended cyclic prefix length; and
performs blind decoding of one or more resource region candidates of the plurality of resource region candidates to obtain the downlink control information, and
the base station comprising;
control circuitry which, in operation, configures the plurality of resource region candidates based on the division number; and
a transmitter which, in operation, maps downlink control information to one of the plurality of resource region candidates and, in operation, transmits the mapped downlink control information.