公开(公告)号：US20240349152A1

公开(公告)日：2024-10-17

申请号：US18755830

申请日：2024-06-27

Applicant: KDDI CORPORATION

Inventor： Takeo OHSEKI ,  Masahito UMEHARA ,  Issei KANNO ,  Yasuhiro SUEGARA

IPC: H04W36/28

CPC classification number: H04W36/28

Abstract: A terminal comprises a function capable of operating in a plurality of states that include a first state in which a connection with a base station has been established, and a second state in which a connection with a base station has not been established, but the base station holds information regarding the terminal device. After starting operation in the second state from a state in which the terminal operates with a first base station in the first state, if predetermined information that enables communication with the first base station in the second state and that has been acquired from the first base station in the first state is held, the terminal determines whether a signal transmission target has changed from the first base station to a second base station device, and performs communication according to a result of the determination.

公开(公告)号：US20240298360A1

公开(公告)日：2024-09-05

申请号：US18662370

申请日：2024-05-13

Applicant: KDDI CORPORATION

Inventor： Takeo OHSEKI ,  Issei KANNO ,  Yasuhiro SUEGARA ,  Masahito UMEHARA

IPC: H04W74/0833 ,  H04W76/10

CPC classification number: H04W74/0841 ,  H04W76/10

Abstract: A terminal apparatus, which is able to establish a connection with a base station apparatus via a two-step random access procedure by transmitting a first signal including a random access preamble and predetermined information to the base station apparatus and receiving a second signal as a reply to the first signal from the base station apparatus, acquires a random access-radio network temporary identifier (RA-RNTI) on the basis of a radio resource having been used to transmit the predetermined information with the first signal, and executes reception processing of the second signal using the RA-RNTI.

公开(公告)号：US20220007430A1

公开(公告)日：2022-01-06

申请号：US17479315

申请日：2021-09-20

Applicant: KDDI CORPORATION

Inventor： Masahito UMEHARA ,  Issei KANNO ,  Takeo OHSEKI ,  Yasuhiro SUEGARA

IPC: H04W74/08 ,  H04W56/00 ,  H04W16/28

Abstract: A terminal apparatus transmits message 1 of a 4-step random access procedure using information of a first beam among a plurality of beams formed by a base station apparatus in order to connect to the base station apparatus, receives, from the base station apparatus, message 2 of the random access procedure as a response to the message 1, and transmits, in response to the message 2, message 3 of the random access procedure including information of a second beam as a beam serving a candidate for switching from the first beam based on radio qualities measured for the plurality of beams after transmitting the message 1.

公开(公告)号：US20240421885A1

公开(公告)日：2024-12-19

申请号：US18814961

申请日：2024-08-26

Applicant: KDDI CORPORATION

Inventor： Shunsuke KAMIWATARI ,  Issei KANNO ,  Takeo OHSEKI ,  Kosuke YAMAZAKI

IPC: H04B7/06

Abstract: A control apparatus that controls beam search processing between dispersed communication apparatus and user equipment performs: instructing to transmit first reference signals using first beams; obtaining first feedback information including a combination of identification information of one or more first beams and received signal strength; if a predetermined number or greater of identification information of different first beams is included in the first feedback information obtained from the user equipment, determining first beams of a number fewer than the predetermined number to use in measuring second reference signals from among first beams of the predetermined number or greater; and reporting a parameter of the second reference signals transmitted using second beams that correspond to the first beam determined to use in measuring and that have a narrower beam width than the first beams.

公开(公告)号：US20240214944A1

公开(公告)日：2024-06-27

申请号：US18600940

申请日：2024-03-11

Applicant: KDDI CORPORATION

Inventor： Masaaki ITO ,  Issei KANNO ,  Takeo OHSEKI ,  Kosuke YAMAZAKI

IPC: H04W52/24 ,  H04W52/06 ,  H04W72/044

CPC classification number: H04W52/241 ,  H04W52/06 ,  H04W72/0473

Abstract: A control device included in a radio communication system that provides a communication service to a terminal device via a portion of many antennas notifies the terminal device of information that makes it possible to identify measurement target radio signals to be used by the terminal device when executing transmission power control from among radio signals respectively transmitted from the antennas.

公开(公告)号：US20230090357A1

公开(公告)日：2023-03-23

申请号：US18072948

申请日：2022-12-01

Applicant: KDDI CORPORATION

Inventor： Masahito UMEHARA ,  Issei KANNO ,  Takeo OHSEKI ,  Yasuhiro SUEGARA

IPC: H04W76/27

Abstract: A base station device transmits a control signal for causing a transition from an RRC_CONNECTED state to an RRC_INACTIVE state and including connection parameter information to a terminal device. The terminal device performs uplink transmission to the base station device using the connection parameter information included in the control signal in the RRC_INACTIVE state to which the RRC_CONNECTED state has transitioned. The base station device performs uplink reception from the terminal device that is in the RRC_INACTIVE state to which the RRC_CONNECTED state has transitioned using the connection parameter information included in the control signal.

公开(公告)号：US20210368554A1

公开(公告)日：2021-11-25

申请号：US17396985

申请日：2021-08-09

Applicant: KDDI CORPORATION

Inventor： Takeo OHSEKI ,  Issei KANNO ,  Yasuhiro SUEGARA ,  Masahito UMEHARA

IPC: H04W74/08 ,  H04W76/10

Abstract: A terminal apparatus, which is able to establish a connection with a base station apparatus via a two-step random access procedure by transmitting a first signal including a random access preamble and predetermined information to the base station apparatus and receiving a second signal as a reply to the first signal from the base station apparatus, acquires a random access-radio network temporary identifier (RA-RNTI) on the basis of a radio resource having been used to transmit the predetermined information with the first signal, and executes reception processing of the second signal using the RA-RNTI.

公开(公告)号：US20210204353A1

公开(公告)日：2021-07-01

申请号：US17265912

申请日：2019-07-10

Applicant: KDDI CORPORATION

Inventor： Masahito UMEHARA ,  Issei KANNO ,  Takeo OHSEKI ,  Yasuhiro SUEGARA

IPC: H04W76/27

Abstract: A base station device transmits a control signal for causing a transition from an RRC_CONNECTED state to an RRC_INACTIVE state and including connection parameter information to a terminal device. The terminal device performs uplink transmission to the base station device using the connection parameter information included in the control signal in the RRC_INACTIVE state to which the RRC_CONNECTED state has transitioned. The base station device performs uplink reception from the terminal device that is in the RRC_INACTIVE state to which the RRC_CONNECTED state has transitioned using the connection parameter information included in the control signal.

公开(公告)号：US20230013001A1

公开(公告)日：2023-01-19

申请号：US17953709

申请日：2022-09-27

Applicant: KDDI CORPORATION

Inventor： Takeo OHSEKI ,  Issei KANNO ,  Naoto TSUMACHI ,  Kosuke YAMAZAKI

IPC: H04W52/14 ,  H04W52/24

Abstract: A communication device capable of connecting to and communicating with another device using a first function operating as a terminal device and a second function operating as a base station device, the communication device acquires a first reception power density of a signal of a downlink received from an upstream device connected by the first function, acquires a second reception power density of a signal of an uplink received from a downstream device connected by the second function, and transmits a transmission power control command for controlling transmission power of the signal of the downlink to the upstream device, based on the first reception power density and the second reception power density.

公开(公告)号：US20210204184A1

公开(公告)日：2021-07-01

申请号：US17198620

申请日：2021-03-11

Applicant: KDDI CORPORATION

Inventor： Takeo OHSEKI ,  Masahito UMEHARA ,  Issei KANNO ,  Yasuhiro SUEGARA

IPC: H04W36/08 ,  H04W36/00

Abstract: A terminal comprises a function capable of operating in a plurality of states that include a first state in which a connection with a base station has been established, and a second state in which a connection with a base station has not been established, but the base station holds information regarding the terminal device. After starting operation in the second state from a state in which the terminal operates with a first base station in the first state, if predetermined information that enables communication with the first base station in the second state and that has been acquired from the first base station in the first state is held, the terminal determines whether a signal transmission target has changed from the first base station to a second base station device, and performs communication according to a result of the determination.