Patents by Inventor Keiichi Kubota

Keiichi Kubota has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220150880
    Abstract: Wireless communications systems and methods related to signaling of direct current (DC) locations of user equipment devices (UEs) in a new radio (NR) network are provided. A wireless communication device receives, from a base station, at least one of a carrier aggregation (CA) configuration or a bandwidth part (BWP) configuration. The wireless communication device determines a direct current (DC) location based on at least one of the CA configuration or the BWP configuration. The wireless communication device transmits, to the base station, a report based on the determined DC location. The wireless communication device communicates, with the base station, a phase tracking reference signal (PTRS) configured based on the report.
    Type: Application
    Filed: October 25, 2021
    Publication date: May 12, 2022
    Inventors: Keiichi KUBOTA, Tao LUO, Alexandros MANOLAKOS, Wooseok NAM, Sumit VERMA, Peter GAAL
  • Patent number: 11330653
    Abstract: Methods, systems, and devices for wireless communications are described. A wireless communications system may support multi-connectivity for a user equipment (UE) with multiple distributed units (DUs) under one central unit (CU), the DUs and the CU belonging to a base station. The UE may establish radio resource control (RRC) connections with multiple cell groups corresponding to multiple DUs under the CU. The UE may transmit measurement reports that provide measurement information for cells in proximity to the UE. The UE may maintain a set of active cell groups and a set of inactive cell groups. In some cases, one or more cell groups may be identified as controlling cell groups used to transmit control information. In some examples, the UE may replicate an uplink packets and transmit the uplink packet and replicates on multiple cell groups. In some cases, the UE may aggregate an uplink transmission among multiple cell groups.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: May 10, 2022
    Assignee: QUALCOMM Incorporated
    Inventors: Karthika Paladugu, Yu-Ting Yu, Gavin Bernard Horn, Keiichi Kubota
  • Publication number: 20220141087
    Abstract: Some aspects provide for establishing a radio connection for the wireless communication, determining a configuration for whether to segment one or more packets for the wireless communication using the established radio connection, and communicating the one or more packets based on the determined configuration. Some aspects provide for assembling a first frame comprising one or more packets, transmitting the first frame, determining whether a portion of one or more packets was truncated during the assembling of the first frame, and transmitting a second frame comprising at least the truncated portion of the one or more packets of the first frame. Some aspects provide for receiving a first frame comprising one or more packets, determining that a portion of one or more packets is truncated, and determining whether to ignore as padding at least the truncated portion of the one or more packets of the first frame.
    Type: Application
    Filed: November 19, 2021
    Publication date: May 5, 2022
    Inventors: Yu-Ting YU, Gavin Bernard HORN, Anurag VARDHAN, Rotem COOPER, Aziz GHOLMIEH, Keiichi KUBOTA
  • Patent number: 11297519
    Abstract: Certain aspects of the present disclosure provide procedures for new radio (NR) cell measurement. According to certain aspects, a method of wireless communication by a user equipment (UE) is provided. The method generally includes receiving one or more downlink signals from a cell, wherein the cell is of a first cell type that supports a first set of functions or a second cell type that supports a second set of functions, wherein the second set of functions is different than the first set of functions; determining a cell type of the cell based on the one or more downlink signals; and communicating with the cell based on the determination.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: April 5, 2022
    Assignee: QUALCOMM Incorporated
    Inventors: Keiichi Kubota, Sumeeth Nagaraja, Tao Luo, Gavin Bernard Horn, Haitong Sun, Ravi Agarwal
  • Publication number: 20220078842
    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a request message to a base station while operating in an idle mode. The base station may generate, in response to the request message, a response message including a random access preamble index corresponding to the received request message. In some cases, the base station may determine a radio network temporary identifier (RNTI) based on the random access preamble index and scramble a cyclic redundancy check (CRC) of the response message with the RNTI. In some examples, the random access preamble index may be included in a payload of the response message. The UE may monitor a physical downlink control channel for the response message to the request message and receive the response message on the physical downlink control channel.
    Type: Application
    Filed: November 12, 2021
    Publication date: March 10, 2022
    Inventors: Sony Akkarakaran, Tao Luo, Keiichi Kubota
  • Patent number: 11272412
    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may autonomously initiate a handover procedure and select a target base station for the handover procedure. The UE may measure a signal from the source base station or the target base station, or both, and the UE may determine whether specific criteria at both base stations are within a pre-configured range. If the criteria at both base stations are within the pre-configured range, the UE may identify the target base station as a potential candidate for a handover. Accordingly, when the UE determines that radio conditions with the source base station are deteriorating (or fall below a threshold), the UE may initiate a handover to the target base station autonomously and without specific direction from the source base station.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: March 8, 2022
    Assignee: QUALCOMM Incorporated
    Inventors: Aleksandar Damnjanovic, Keiichi Kubota, Linhai He, Gavin Bernard Horn, Peng Cheng
  • Patent number: 11240733
    Abstract: Certain aspects of the present disclosure relate to methods and apparatus for enabling access control in a connected mode, idle mode, and an inactive state. An exemplary method generally includes receiving access control information associated with one or more services used by the UE for communicating with the wireless communications network, receiving a request to transmit traffic using the one or more services, checking a type of the traffic against the access control information, and scheduling the traffic for transmission if the type of the traffic satisfies one or more criteria in the access control information based on the checking.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: February 1, 2022
    Assignee: QUALCOMM Incorporated
    Inventors: Keiichi Kubota, Haris Zisimopoulos, Lenaig Genevieve Chaponniere, Masato Kitazoe, Gavin Bernard Horn, Arvind Santhanam, Ajith Tom Payyappilly, Xipeng Zhu
  • Patent number: 11228967
    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may obtain access to a base station by performing an initial access procedure within an initial access bandwidth. In some cases, the UE may monitor for a cell specific configuration in the initial access bandwidth that indicate one or more first common search spaces within the initial access bandwidth that the UE may monitor for control information. Additionally, the UE may receive dedicated signaling after the initial access procedure that indicates a downlink bandwidth part (BWP) and one or more second common search spaces within the downlink BWP to monitor for control information. Accordingly, the UE may monitor the first common search spaces, the second common search spaces, or both based on the dedicated signaling.
    Type: Grant
    Filed: September 5, 2019
    Date of Patent: January 18, 2022
    Assignee: QUALCOMM INCORPORATED
    Inventors: Huilin Xu, Peter Pui Lok Ang, Heechoon Lee, Keiichi Kubota
  • Publication number: 20220007306
    Abstract: New radio (NR) power headroom report (PHR) design for millimeter wave (mmWave) deployment is discussed. The power control process for mmWave may include beam-specific periodic PHR reporting and user equipment (UE)-specific event-trigger PHR reporting. The periodic PHR reporting may either provide a single PHR that includes power headroom information for each of the serving beams, or the UE may be configured to measure and report PHR for different beams in different slots. When reporting a single PHR with power headroom information for multiple serving beams, a beam index may be included in the reserved bits of the PHR. For the event-trigger PHR, the PHR reported based on a detected event trigger may provide power headroom information only for the current serving beam, or for all serving beams.
    Type: Application
    Filed: September 3, 2021
    Publication date: January 6, 2022
    Inventors: Peng Cheng, Keiichi Kubota, Gavin Bernard Horn, Aleksandar Damnjanovic, Tao Luo, Linhai He
  • Patent number: 11212807
    Abstract: Systems and techniques are disclosed for selecting service-specific cells that considers additional information about service availability at the cells. A base station stores service availability information in system information. A UE searching for a service-specific cell on which to camp receives the system information with service availability. The UE analyzes its service requirements against the service availability as well as measured radio conditions and selects a cell that enables service-specific support on which to camp. When a change occurs to availability of the service support at the base station, it notifies the camped UE of the change and the UE obtains the changed system information to determine whether to reselect a different cell on which to camp. When a service-specific cell is not available, the UE may select a suitable cell for normal service and periodically perform cell reselection in an attempt to again camp on a service-specific cell.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: December 28, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Keiichi Kubota, Gavin Bernard Horn, Chih Ping Li
  • Patent number: 11202311
    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a request message to a base station while operating in an idle mode. The base station may generate, in response to the request message, a response message including a random access preamble index corresponding to the received request message. In some cases, the base station may determine a radio network temporary identifier (RNTI) based on the random access preamble index and scramble a cyclic redundancy check (CRC) of the response message with the RNTI. In some examples, the random access preamble index may be included in a payload of the response message. The UE may monitor a physical downlink control channel for the response message to the request message and receive the response message on the physical downlink control channel.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: December 14, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Sony Akkarakaran, Tao Luo, Keiichi Kubota
  • Patent number: 11201780
    Abstract: Some aspects provide for establishing a radio connection for the wireless communication, determining a configuration for whether to segment one or more packets for the wireless communication using the established radio connection, and communicating the one or more packets based on the determined configuration. Some aspects provide for assembling a first frame comprising one or more packets, transmitting the first frame, determining whether a portion of one or more packets was truncated during the assembling of the first frame, and transmitting a second frame comprising at least the truncated portion of the one or more packets of the first frame. Some aspects provide for receiving a first frame comprising one or more packets, determining that a portion of one or more packets is truncated, and determining whether to ignore as padding at least the truncated portion of the one or more packets of the first frame.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: December 14, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Yu-Ting Yu, Gavin Bernard Horn, Anurag Vardhan, Rotem Cooper, Aziz Gholmieh, Keiichi Kubota
  • Patent number: 11197344
    Abstract: Methods, systems, and devices for wireless communication are described. In some wireless communications systems, a transmitting device may identify a Radio Link Control (RLC) service data unit (SDU) to be transmitted to a receiving device. In some cases, the transmitting device may not have access to sufficient resources to transmit the entire RLC SDU. As such, the transmitting device may segment the RLC SDU into RLC SDU segments, and the transmitting device may transmit the RLC SDU segments to the receiving device. If an RLC layer at the receiving device receives one or more RLC SDU segments out of sequence, the RLC layer may initiate a reassembly (or reordering) timer. The RLC layer may reassemble the successfully received RLC SDU segments to be passed to upper layers. Once the timer expires, the RLC layer may declare that the missing RLC SDU segments are lost.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: December 7, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Ruiming Zheng, Yu-Ting Yu, Keiichi Kubota, Gavin Bernard Horn
  • Patent number: 11184870
    Abstract: Discovery and synchronization channels are discussed for user-tracking zones in a cellular network. User-tracking zones reduce the mobility tracking burden on the UE and shift the tracking responsibility to the network. This shift allows for UE and network power savings from reduced searching at the UE as well as through efficient paging area tracking and less broadcast signaling. The various aspects provide channel design for initial synchronization and discovery of the user-tracking zones. A single frequency network (SFN) synchronization channel is provided with at least a reference signal for time synchronization and payload information that may include a zone identifier (ID), formatting for a system information transmission request, and resource allocation for the request. The zone ID may be included in the payload or embedded into the reference signal. Facility is also provided for handling zone nodes of different power classes that allows for maintaining the SFN operations.
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: November 23, 2021
    Assignee: QUALCOMM INCORPORATED
    Inventors: Joseph Binamira Soriaga, Tingfang Ji, Yichao Huang, Naga Bhushan, Keiichi Kubota, Gavin Bernard Horn
  • Publication number: 20210337470
    Abstract: Certain aspects of the present disclosure generally relate to wireless communication. In some aspects, a first base station for wireless communication, associated with a first radio access technology (RAT), may generate a message to cause a user equipment to wake up from a power saving state or to reconfigure a cycle associated with the power saving state, wherein the message includes an indication that the user equipment is to wake up from the power saving state or to reconfigure the cycle; and/or transmit the message toward the user equipment via a second base station, associated with a second RAT and the user equipment, to cause the user equipment to wake up from the power saving state or reconfigure the cycle. Numerous other aspects are provided.
    Type: Application
    Filed: April 21, 2021
    Publication date: October 28, 2021
    Inventors: Linhai He, Ozcan Ozturk, Gavin Bernard Horn, Keiichi Kubota
  • Patent number: 11160055
    Abstract: Wireless communications systems and methods related to signaling of direct current (DC) locations of user equipment devices (UEs) in a new radio (NR) network are provided. A wireless communication device receives, from a base station, at least one of a carrier aggregation (CA) configuration or a bandwidth part (BWP) configuration. The wireless communication device determines a direct current (DC) location based on at least one of the CA configuration or the BWP configuration. The wireless communication device transmits, to the base station, a report based on the determined DC location. The wireless communication device communicates, with the base station, a phase tracking reference signal (PTRS) configured based on the report.
    Type: Grant
    Filed: April 8, 2019
    Date of Patent: October 26, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Keiichi Kubota, Tao Luo, Alexandros Manolakos, Wooseok Nam, Sumit Verma, Peter Gaal
  • Patent number: 11153792
    Abstract: Certain aspects of the present disclosure relate to methods and apparatus for signaling to and/or from a UE in an inactive state.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: October 19, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Ozcan Ozturk, Gavin Bernard Horn, Soo Bum Lee, Keiichi Kubota
  • Patent number: 11153820
    Abstract: Techniques are described for wireless communication. A method for wireless communication at a user equipment (UE) includes receiving, by the UE, a first transmission on a beam over a radio frequency spectrum during a first time interval. The first transmission includes an indication of a subsequent physical downlink control channel (PDCCH) transmission on the beam. The indication includes information about a PDCCH in a second time interval subsequent to the first time interval. The method also includes configuring a power saving state of the UE based at least in part on the indication. A method for wireless communication at a network access device includes transmitting the first transmission to at least one UE, and transmitting the PDCCH during the second time interval.
    Type: Grant
    Filed: January 3, 2018
    Date of Patent: October 19, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Sumeeth Nagaraja, Tao Luo, Aleksandar Damnjanovic, Karl Georg Hampel, Keiichi Kubota, Andrei Radulescu, Haitong Sun, Ozcan Ozturk, Peng Cheng, Linhai He
  • Patent number: 11147093
    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive a system information (SI) message in an overlapped scheduling window; and identify the SI message based at least in part on at least one of: downlink control information (DCI) for the SI message, a system information radio network temporary identifier (SI-RNTI) of the SI message, a time location of the SI message in the overlapped scheduling window, a search space for the DCI, or a combination thereof. Numerous other aspects are provided.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: October 12, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Ozcan Ozturk, Heechoon Lee, Keiichi Kubota
  • Patent number: 11140600
    Abstract: Systems and techniques are disclosed to separate paging and access cell selection (and use) among available cells based on different paging cell and access cell requirements and specific service availability. A UE selects a first cell that meets paging cell requirements as a paging cell and a second cell that meets service requirements as an access cell. Once the UE selects a paging cell, the UE camps on the paging cell to wait for a paging request or a mobile originated request. The UE can select and camp on the access cell prior to a data need, where latency requirements are strict, or delay access cell selection until there is data to transmit where latency requirements are more lax. The UE may also include measurement information of surrounding cells with a paging response/service request, which a core network uses to speed up establishment of dual connectivity or carrier aggregation.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: October 5, 2021
    Assignee: QUALCOMM INCORPORATED
    Inventors: Keiichi Kubota, Gavin Bernard Horn