US 12,232,033 B2
Radio communication system, radio terminals, radio base stations, radio communication method and program
Hisashi Futaki, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Filed by NEC CORPORATION, Tokyo (JP)
Filed on Aug. 18, 2023, as Appl. No. 18/235,579.
Application 15/634,458 is a division of application No. 14/555,800, filed on Nov. 28, 2014, granted, now 9,749,952, issued on Aug. 29, 2017.
Application 14/555,800 is a division of application No. 13/499,526, granted, now 9,042,248, issued on May 26, 2015, previously published as PCT/JP2010/067062, filed on Sep. 30, 2010.
Application 18/235,579 is a continuation of application No. 17/137,471, filed on Dec. 30, 2020, granted, now 11,792,731.
Application 17/137,471 is a continuation of application No. 15/634,458, filed on Jun. 27, 2017, granted, now 10,924,994, issued on Feb. 16, 2021.
Claims priority of application No. 2009-230114 (JP), filed on Oct. 2, 2009.
Prior Publication US 2023/0397104 A1, Dec. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 52/02 (2009.01); H04L 1/1812 (2023.01); H04L 1/1829 (2023.01); H04W 52/46 (2009.01); H04W 72/04 (2023.01); H04W 72/0453 (2023.01); H04W 72/1273 (2023.01); H04W 72/23 (2023.01); H04W 76/28 (2018.01)
CPC H04W 52/0216 (2013.01) [H04L 1/1812 (2013.01); H04L 1/1848 (2013.01); H04W 52/0232 (2013.01); H04W 52/46 (2013.01); H04W 72/04 (2013.01); H04W 72/0453 (2013.01); H04W 72/1273 (2013.01); H04W 72/23 (2023.01); H04W 76/28 (2018.02); Y02D 30/70 (2020.08)] 3 Claims
OG exemplary drawing
 
1. A method for user equipment capable of performing carrier aggregation by using multiple component carriers, the method comprising:
receiving, from a base station:
a first timer value of Discontinuous Reception (DRX) Inactivity Timer (drx-InactivityTimer),
a second timer value of DRX Retransmission Timer (drx-RetransmissionTimer), and
a third timer value of DRX Short Cycle Timer (drxShortCycleTimer), the drxShortCycleTimer being used for all of the multiple component carriers;
starting or restarting the drx-InactivityTimer if Physical Downlink Control Channel (PDCCH) in a component carrier among the multiple component carriers indicates a downlink transmission;
starting a Hybrid Automatic Repeat reQuest (HARQ) Round Trip Time (RTT) Timer corresponding to a HARQ process for the component carrier if PDCCH in the component carrier indicates the downlink transmission;
starting the drx-RetransmissionTimer corresponding to the HARQ process for the component carrier if the HARQ RTT Timer expires and if data of the HARQ process was not successfully decoded;
starting or restarting the drxShortCycleTimer linked to all of the multiple component carriers and using a short DRX cycle if the drx-InactivityTimer expires; and
using a long DRX cycle on all of the multiple component carriers if the drxShortCycleTimer expires.