公开(公告)号：EP2996369A4

公开(公告)日：2016-11-23

申请号：EP14794075

申请日：2014-05-07

申请人： KDDI CORP

发明人： WANG XIAOQIU ,  YAMAMOTO TOSHIAKI ,  OHSEKI TAKEO ,  AKIMOTO YOSUKE ,  KONISHI SATOSHI

IPC分类号： H04W16/02 ,  H04W16/32 ,  H04W28/16 ,  H04W36/10 ,  H04W36/12 ,  H04W76/02 ,  H04W76/04

CPC分类号： H04W36/04 ,  H04M15/56 ,  H04W16/02 ,  H04W16/32 ,  H04W36/0027 ,  H04W36/10 ,  H04W36/12 ,  H04W72/0486 ,  H04W76/025 ,  H04W76/041 ,  H04W84/045

摘要： In a wireless communication system including a wireless terminal device wirelessly connectible to both a macro-cell base station and a small-cell base station, all the user-plane signals destined for the wireless terminal device are transmitted to the small-cell base station; a VoIP signal among the user-plane signals destined for the wireless terminal device is transmitted to the macro-cell base station; the VoIP signal is wirelessly transmitted from the macro-cell base station to the wireless terminal device; any user-plane signal, among the user-plane signals destined for the wireless terminal device, other than the VoIP signal is wirelessly transmitted from the small-cell base station to the wireless terminal device.

公开(公告)号：EP2947940A4

公开(公告)日：2016-06-22

申请号：EP14741045

申请日：2014-01-15

申请人： KDDI CORP

发明人： YAMAMOTO TOSHIAKI ,  OHSEKI TAKEO ,  WANG XIAOQIU ,  AKIMOTO YOSUKE ,  KONISHI SATOSHI

IPC分类号： H04W72/04 ,  H04W76/00

CPC分类号： H04W76/025 ,  H04L5/0032 ,  H04W36/00 ,  H04W72/0426 ,  H04W72/08 ,  H04W76/027

摘要： A terminal device includes: a wireless communication unit that performs wireless communication; a connection control unit that connects to a first base station device so as to be able to wirelessly communicate with the first base station device via the wireless communication unit, the first base station device serving as a primary, the connection control unit connecting to a second base station device so as to be able to wirelessly communicate with the second base station device via the wireless communication unit, the second base station device serving as a secondary; and a first detection unit that determines whether a state of wireless communication between the terminal device and the first base station device is in a disconnected state based on a predetermined condition The connection control unit reconnects between the terminal device and the second base station device such that the second base station device newly serves as a primary base station device when the first detection unit determines that the state of wireless communication is in the disconnected state.

公开(公告)号：EP3032873A4

公开(公告)日：2017-03-15

申请号：EP14835328

申请日：2014-08-07

申请人： KDDI CORP

发明人： KITAGAWA KOICHIRO ,  AKIMOTO YOSUKE ,  FUSHIKI MASASHI ,  KONISHI SATOSHI

IPC分类号： H04W76/02 ,  H04W28/16 ,  H04W48/10 ,  H04W92/18

CPC分类号： H04W48/16 ,  H04W48/10 ,  H04W76/023 ,  H04W92/18

摘要： In a radio communication system in which communication is possible between radio terminal apparatuses via a radio base station apparatus, the radio base station apparatus stores information regarding a permission condition of inter-terminal direct communication, which is direct communication between the radio terminal apparatuses, and controls execution of the inter-terminal direct communication based on the permission condition. The radio terminal apparatuses determine whether to execute the inter-terminal direct communication based on information transmitted from the radio base station apparatus and indicating whether execution of the inter-terminal direct communication is possible.

公开(公告)号：EP3062550A4

公开(公告)日：2016-11-02

申请号：EP14855107

申请日：2014-10-14

申请人： KDDI CORP

发明人： FUSHIKI MASASHI ,  AKIMOTO YOSUKE ,  KITAGAWA KOICHIRO ,  KONISHI SATOSHI

IPC分类号： H04W24/04 ,  H04W28/16 ,  H04W36/00 ,  H04W36/16 ,  H04W36/22 ,  H04W76/02 ,  H04W76/06 ,  H04W92/20

CPC分类号： H04W76/028 ,  H04W24/04 ,  H04W36/0011 ,  H04W36/16 ,  H04W36/22 ,  H04W76/06 ,  H04W76/066

摘要： Provided is a base station device in a radio communication system in which a communication device is capable of connecting to the base station device and a first other base station device simultaneously. The base station device receives, from the communication device, a notification indicating that a failure has occurred in a radio link between the communication device and the first other base station device, and upon receiving the notification, transmits a first message indicating the occurrence of the failure to the first other base station device. Upon receiving the first message, the first other base station device releases a connection between itself and the communication device.

公开(公告)号：EP2947911A4

公开(公告)日：2016-08-31

申请号：EP14740481

申请日：2014-01-10

申请人： KDDI CORP

发明人： YAMAMOTO TOSHIAKI ,  OHSEKI TAKEO ,  WANG XIAOQIU ,  AKIMOTO YOSUKE ,  KONISHI SATOSHI

IPC分类号： H04W24/04 ,  H04W76/02

CPC分类号： H04W76/027 ,  H04L5/001 ,  H04L5/0098 ,  H04W76/025 ,  H04W76/028 ,  H04W76/064 ,  H04W88/02 ,  H04W88/08

摘要： A terminal device includes a wireless communication part configured to wirelessly communicate with base station devices; a link controller configured to establish a link with a primary base station device (PCell) so as to enable a wireless communication via the wireless communication part while establishing a link with a secondary base station device (SCell) so as to enable a wireless communication via the wireless communication part; a primary base station link failure detector configured to detect a radio link failure in the wireless communication with the primary base station device based on the predetermined condition; and a primary base station link failure information transmitter configured to wirelessly transmit the information, concerning the radio link failure with the primary base station device, to the secondary base station device when the primary base station link failure detector detects the radio link failure status.

公开(公告)号：EP2947941A4

公开(公告)日：2016-08-17

申请号：EP14741184

申请日：2014-01-15

申请人： KDDI CORP

发明人： YAMAMOTO TOSHIAKI ,  OHSEKI TAKEO ,  WANG XIAOQIU ,  AKIMOTO YOSUKE ,  KONISHI SATOSHI

IPC分类号： H04W36/04 ,  H04W36/08 ,  H04W36/30

CPC分类号： H04W36/0027 ,  H04W36/04 ,  H04W36/30 ,  H04W72/08 ,  H04W72/085 ,  H04W76/025

摘要： A terminal device includes: a wireless communication unit that performs wireless communication; a connection control unit that connects to a first base station device so as to be able to wirelessly communicate with the first base station device via the wireless communication unit, the first base station serving as a primary, the connection control unit connecting to a second base station device so as to be able to wirelessly communicate with the second base station device via the wireless communication unit, the second base station device serving as a secondary; a detection unit that determines whether quality of wireless communication between the terminal device and the first base station device is in a low state based on a predetermined condition; and a signal transmission control unit that wirelessly transmits via the wireless communication unit, a predetermined signal toward at least either the first or second base station device when the quality is determined to be in the low state by the detection unit.