US 11,057,960 B2
Radio terminal and base station
Masato Fujishiro, Yokohama (JP); Mayumi Komura, Yokohama (JP); and Henry Chang, San Diego, CA (US)
Assigned to KYOCERA Corporation, Kyoto (JP)
Filed by KYOCERA CORPORATION, Kyoto (JP)
Filed on Feb. 6, 2019, as Appl. No. 16/268,712.
Application 16/268,712 is a continuation of application No. PCT/JP2017/028199, filed on Aug. 3, 2017.
Claims priority of provisional application 62/372,925, filed on Aug. 10, 2016.
Prior Publication US 2019/0182889 A1, Jun. 13, 2019
Int. Cl. H04W 76/27 (2018.01); H04W 76/30 (2018.01); H04W 52/02 (2009.01); H04W 4/02 (2018.01)
CPC H04W 76/30 (2018.02) [H04W 4/027 (2013.01); H04W 52/0216 (2013.01); H04W 76/27 (2018.02); Y02D 30/70 (2020.08)] 2 Claims
OG exemplary drawing
 
1. A user equipment configured for dual connectivity for a mobile communication system, comprising:
a receiver configured to receive, from a base station, an RRC (Radio Resource Control) connection release message including first information for suspending an RRC connection of the user equipment and for suspending the dual connectivity; and
a controller configured to cause the user equipment to transition to an RRC inactive state in response to receiving the first information, wherein
the controller is configured to suspend the dual connectivity while maintaining configuration information of the dual connectivity, based on the first information, and
the controller is configured to transmit an RRC connection resume request message, to the base station,
the receiver is configured to receive an RRC resume message including information indicating that the user equipment shall restore the dual connectivity,
the controller is configured to
in response to receiving the RRC resume message including the information indicating that the user equipment shall restore the dual connectivity, cause the user equipment to transition to an RRC connected state, and
reestablish the dual connectivity based on the maintained configuration information of the dual connectivity.