Patents by Inventor Chang-sik Choi

Chang-sik Choi 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: 20250106596
    Abstract: Certain aspects of the present disclosure provide techniques for improving sidelink positioning via messaging between wireless nodes, e.g., roadside service units (RSUs). A method that may be performed by a user equipment (UE) includes receiving a first positioning reference signal (PRS) from a first wireless node, receiving a second PRS from a second wireless node, receiving, from the first wireless node, an estimate of a first clock error component between the first wireless node and the second wireless node, and estimating a position of the UE, based on the first PRS, the second PRS, and the estimate of the first clock error component.
    Type: Application
    Filed: December 10, 2024
    Publication date: March 27, 2025
    Inventors: Chang-Sik CHOI, Kapil GULATI, Sudhir Kumar BAGHEL
  • Patent number: 12262346
    Abstract: Aspects relate to group-based positioning reference signal (PRS) broadcast in a wireless communication network. Wireless communication devices communicating over a sidelink channel in the wireless communication network may be grouped into one or more positioning groups. Within each positioning group, a respective order of the wireless communication devices in the positioning group may be identified. The wireless communication devices in a positioning group may then communicate PRSs therebetween over the sidelink channel based on the order of wireless communication devices in the positioning group.
    Type: Grant
    Filed: August 3, 2023
    Date of Patent: March 25, 2025
    Assignee: QUALCOMM Incorporated
    Inventors: Chang-Sik Choi, Kapil Gulati, Gene Wesley Marsh
  • Patent number: 12245185
    Abstract: In one example, a method being performed by a first station and comprises: transmitting a first message including an indication of whether a clock reconfiguration event occurs at the first station; transmitting a first positioning reference signal (PRS); receiving from a second station a second PRS; and transmitting to the second station a second message including a first time when the first PRS is transmitted by the first station and a second time when the second PRS is received by the first station, to enable the second station to determine a roundtrip time (RTT) between the first station and the second station based on the first time, the second time, a third time when the second station receives the first PRS, a fourth time when the second station transmits the second PRS, and the indication.
    Type: Grant
    Filed: November 6, 2020
    Date of Patent: March 4, 2025
    Assignee: QUALCOMM Incorporated
    Inventors: Chang-Sik Choi, Kapil Gulati, Sudhir Kumar Baghel, Anantharaman Balasubramanian
  • Patent number: 12245256
    Abstract: A responder user equipment (UE) in separate ranging sessions may determine whether there is a collision between the ranging signals assigned to broadcast in the separate ranging sessions. A collision in the ranging signals is detected when the ranging signals have the same frequencies and broadcast times, e.g., the broadcast time of one ranging signal is within a predetermined amount of time for the other ranging signal. When a collision in the ranging signals is detected, the responder UE sends a message to the initiator UE indicating the possibility of a collision. Available times for broadcasting the ranging signals may be determined, e.g., by the responder UE or the initiator UE. The initiator UE may initiate a new ranging session based on the available times for broadcasting the ranging signal or may proceed with the ranging session with the possibility that the responder UE will not participate.
    Type: Grant
    Filed: November 7, 2022
    Date of Patent: March 4, 2025
    Assignee: QUALCOMM Incorporated
    Inventors: Chang-Sik Choi, Dan Vassilovski, Kapil Gulati
  • Patent number: 12207161
    Abstract: Certain aspects of the present disclosure provide techniques for improving sidelink positioning via messaging between wireless nodes, e.g., roadside service units (RSUs). A method that may be performed by a user equipment (UE) includes receiving a first positioning reference signal (PRS) from a first wireless node, receiving a second PRS from a second wireless node, receiving, from the first wireless node, an estimate of a first clock error component between the first wireless node and the second wireless node, and estimating a position of the UE, based on the first PRS, the second PRS, and the estimate of the first clock error component.
    Type: Grant
    Filed: May 12, 2023
    Date of Patent: January 21, 2025
    Assignee: QUALCOMM Incorporated
    Inventors: Chang-Sik Choi, Kapil Gulati, Sudhir Kumar Baghel
  • Patent number: 12200662
    Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a pedestrian user equipment (PUE). The apparatus may be configured to monitor a first set of resources to detect a paging indicator indicating a paging message is carried on a second set of resources allocated for vehicle-to-pedestrian (V2P) communication consecutive to the first set of resources; to decode information on the second set of resources to detect the paging message from a second UE when the paging indicator is detected, the paging message being associated with the V2P communication; and to refrain from decoding the information on the second set of resources when the paging indicator is undetected.
    Type: Grant
    Filed: January 13, 2021
    Date of Patent: January 14, 2025
    Assignee: QUALCOMM Incorporated
    Inventors: Anantharaman Balasubramanian, Shuanshuan Wu, Tien Viet Nguyen, Gabi Sarkis, Kapil Gulati, Sudhir Kumar Baghel, Chang-Sik Choi
  • Patent number: 12180556
    Abstract: Provided are a hot rolled steel sheet having excellent crashworthiness and a method for manufacturing same. The hot rolled steel sheet of the present invention contains, in weight %, 0.05-0.13% of carbon (C), 0.2-2.0% of silicon (Si), 1.3-3.0% of manganese (Mn), 0.01-0.1% of aluminum (Al), 0.001-0.05% of phosphor (P), 0.001-0.05% of sulfur (S), 0.001-0.02% of nitrogen (N), and the balance being Fe and other inevitable impurities, and has a steel microstructure comprising, in area %, 55% or more of bainitic ferrite, 10% or more of a martensite/austenite composite phase (MA), the sum of the bainitic ferrite and the martensite/austenite composite phase (MA) being 95% or more, and the remaining total being less than 5% of granular ferrite, retained austenite, and carbides.
    Type: Grant
    Filed: September 13, 2021
    Date of Patent: December 31, 2024
    Assignee: POSCO CO., LTD
    Inventors: Tae-Jin Song, Sung-Il Kim, Chang-Sik Choi
  • Patent number: 12177812
    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may receive a set of resource maps from one or more second UEs, each resource map of the set of resource maps including resource availability information for a respective time window. The first UE may select a set of resources based at least in part on at least one resource map of the set of resource maps. The first UE may transmit a signal using the selected set of resources. Numerous other aspects are provided.
    Type: Grant
    Filed: February 24, 2021
    Date of Patent: December 24, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Chang-Sik Choi, Kapil Gulati, Sudhir Kumar Baghel, Gabi Sarkis
  • Patent number: 12160845
    Abstract: A vehicle-enabled user equipment (VUE) and related techniques are disclosed. In one aspect, the VUE issues a periodic broadcast, or signals a response to a requesting source, identifying its location management capability (LMC). The UE forms a link with a recipient VUE of the broadcast to perform joint localization of the pedestrian UE (PUE). Joint localization by VUE and another VUE may be performed by VUEs and PUEs in the region exchanging ranging signals and ego measurements. The VUE determines a location jointly of the PUE. The location can be determined upon a request, periodically, or in response to a triggered event.
    Type: Grant
    Filed: August 2, 2023
    Date of Patent: December 3, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Anantharaman Balasubramanian, Kapil Gulati, Chang-Sik Choi
  • Patent number: 12133192
    Abstract: Systems, methods, and devices for sidelink positioning determination and communication can employ techniques including obtaining, at a first sidelink-enabled device, data from one or more data sources indicative of one or more criteria for using either round-trip time (RTT)-based positioning of a target node or single-sided (SS)-based positioning of the target node. The techniques also include selecting, with the first sidelink-enabled device, a positioning type from the group may comprise of RTT-based positioning and SS-based positioning, based on the data. The techniques also include sending a message from the first sidelink-enabled device to a second sidelink-enabled device, where the message includes information indicative of the selected positioning type.
    Type: Grant
    Filed: March 18, 2021
    Date of Patent: October 29, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Chang-Sik Choi, Kapil Gulati, Sudhir Kumar Baghel
  • Patent number: 12127158
    Abstract: Disclosed are some examples of techniques for positioning of a user equipment (UE) using positioning reference signal (PRS). One or more units of messages may be communicated between an initiator UE and a responder UE. A unit of message may include a pre-PRS message, a PRS message and a post-PRS message. The pre-PRS message and the post-PRS message may be sent or received using a license spectrum. The PRS message may be sent or received using an unlicensed spectrum. The communication between the initiator UE and the responder UE may be initiated by the initiator UE identifying the responder UE from a plurality of UEs based on positioning properties of the responder UE. The positioning properties of the responder UE may include one or more of a direction, a velocity, a location confidence and a location of the responder UE.
    Type: Grant
    Filed: November 21, 2022
    Date of Patent: October 22, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Chang-Sik Choi, Kapil Gulati, Gene Wesley Marsh, Junyi Li
  • Publication number: 20240251475
    Abstract: In a particular implementation, a method of wireless communication includes transmitting, from a first user equipment (UE) to a second UE, a radio resource control (RRC) request that includes a first discontinuous reception (DRX) preference at the first UE. The method also includes receiving, at the first UE from the second UE, a RRC setup message that includes a second DRX preference at the second UE. The method further includes transmitting, from the first UE to the second UE, a RRC setup complete message that includes an indication of a confirmed DRX cycle.
    Type: Application
    Filed: February 2, 2024
    Publication date: July 25, 2024
    Inventors: Anantharaman BALASUBRAMANIAN, Sudhir Kumar BAGHEL, Shuanshuan WU, Gabi SARKIS, Tien Viet NGUYEN, Kapil GULATI, Chang-Sik CHOI
  • Patent number: 11991109
    Abstract: In an aspect, an initiator transmits a positioning reference signal. The initiator receives a plurality of responder positioning reference signals sent from individual responders of a plurality of responders. The initiator transmits a measurement message comprising a first set of measurements that are determined based on the positioning reference signal and the plurality of responder positioning reference signals. The initiator receives responder measurement messages sent from the individual responders of the plurality of responders. The initiator receives updated map information from an anchor and updates pre-existing map information based on the updated map information.
    Type: Grant
    Filed: December 13, 2022
    Date of Patent: May 21, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Chang-Sik Choi, Kapil Gulati, Junyi Li
  • Patent number: 11991662
    Abstract: Multiple user equipments (UEs) may initiate independent ranging sessions at nearly the same time and location and which may interfere with each other. A UE that receives multiple initial messages for ranging determines if there is temporal separation between the ranging sessions. The UE may further determine if there is geographic separation between the ranging sessions, e.g., the initiating UEs are separated. If separation is lacking, the UE separates available ranging signal properties, such as frequency bandwidth, timing instances, and identifiers, and communicates different sets of ranging signal properties to each initiating UE. The multiple ranging sessions may be performed using the different sets of ranging signal properties with less risk of interference.
    Type: Grant
    Filed: January 28, 2021
    Date of Patent: May 21, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Chang-Sik Choi, Kapil Gulati, Gene Wesley Marsh, Junyi Li
  • Patent number: 11970749
    Abstract: Provided is a method of manufacturing a hot rolled steel sheet having excellent formability and fatigue properties, including: preparing a slab including, by weight %, 0.3 to 0.8% of carbon C, 13 to 25% of manganese (Mn), 0.1 to 1.0% of vanadium (V), 0.005 to 2.0% of silicon (Si), 0.01 to 2.5% of aluminum (Al), 0.03% or less of phosphorus (P), 0.03% or less of sulfur (S), 0.04% or less (excluding 0%) of nitrogen (N), and a remainder of iron (Fe) and inevitable impurities; heating the slab to 1050 to 1250° C.; finish rolling, the slab heated in the heating, at a temperature of not lower than a recrystallization temperature of a region having an average V concentration and not higher than a recrystallization temperature of a region having twice the average V concentration, to obtain a hot rolled steel sheet; and coiling the hot-rolled steel sheet at 50 to 700° C.
    Type: Grant
    Filed: February 17, 2023
    Date of Patent: April 30, 2024
    Assignee: POSCO CO., LTD
    Inventors: Tae-Jin Song, Jeong-Eun Kim, Chang-Sik Choi
  • Patent number: 11971499
    Abstract: A positioning method includes: establishing a positioning session between a plurality of positioning devices including a first positioning device and a second positioning device; obtaining line-of-sight/non-line-of-sight status (LOS/NLOS status) for a plurality of positioning device pairs, each being a pair of the plurality of positioning devices; and transmitting a disable message to the first positioning device based on the LOS/NLOS status of at least one of the first positioning device or the second positioning device being non-line-of-sight relative to at least a subset of the plurality of positioning devices, the disable message indicating to disable at least one of transmission of one or more first positioning reference signals from the first positioning device or measurement of one or more second positioning reference signals from the second positioning device by the first positioning device.
    Type: Grant
    Filed: September 17, 2021
    Date of Patent: April 30, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Chang-Sik Choi, Kapil Gulati, Gene Wesley Marsh, Junyi Li
  • Patent number: 11960019
    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may identify a plurality of UEs for a UE positioning session. The UE may identify a set of parameters for the UE positioning session. The UE may broadcast information indicating at least the set of parameters for the UE positioning session. The UE may receive, from at least one of the plurality of UEs, a set of positioning reference signals (PRSs) based at least in part on the set of parameters. The UE may broadcast, based at least in part on the set of PRSs, positioning information. Numerous other aspects are provided.
    Type: Grant
    Filed: September 15, 2021
    Date of Patent: April 16, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Chang-Sik Choi, Kapil Gulati, Gene Wesley Marsh, Peter Gaal
  • Patent number: 11950200
    Abstract: A method of wireless communication by a positioning entity includes determining an accuracy of a positioning estimate of a first non-anchor sidelink user equipment (UE). The method also includes determining the accuracy satisfies an accuracy condition. The method further includes configuring the first non-anchor sidelink UE as a first anchor UE based on the positioning estimate satisfying the accuracy condition.
    Type: Grant
    Filed: March 8, 2021
    Date of Patent: April 2, 2024
    Assignee: QUALCOMM INCORPORATED
    Inventors: Chang-Sik Choi, Kapil Gulati, Shuanshuan Wu
  • Patent number: 11924906
    Abstract: In a particular implementation, a method of wireless communication includes transmitting, from a first user equipment (UE) to a second UE, a radio resource control (RRC) request that includes a first discontinuous reception (DRX) preference at the first UE. The method also includes receiving, at the first UE from the second UE, a RRC setup message that includes a second DRX preference at the second UE. The method further includes transmitting, from the first UE to the second UE, a RRC setup complete message that includes an indication of a confirmed DRX cycle.
    Type: Grant
    Filed: January 12, 2021
    Date of Patent: March 5, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Anantharaman Balasubramanian, Sudhir Kumar Baghel, Shuanshuan Wu, Gabi Sarkis, Tien Viet Nguyen, Kapil Gulati, Chang-Sik Choi
  • Publication number: 20240031976
    Abstract: Aspects relate to group-based positioning reference signal (PRS) broadcast in a wireless communication network. Wireless communication devices communicating over a sidelink channel in the wireless communication network may be grouped into one or more positioning groups. Within each positioning group, a respective order of the wireless communication devices in the positioning group may be identified. The wireless communication devices in a positioning group may then communicate PRSs therebetween over the sidelink channel based on the order of wireless communication devices in the positioning group.
    Type: Application
    Filed: August 3, 2023
    Publication date: January 25, 2024
    Inventors: Chang-Sik CHOI, Kapil GULATI, Gene Wesley MARSH