Patents by Inventor Caleb Lo

Caleb Lo 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).

  • Uplink timing and frequency synchronization
    Patent number: 11800479
    Abstract: Methods and apparatuses for uplink timing and frequency synchronization in a wireless communication system. A method for operating a user equipment (UE) includes receiving, from a base station (BS), information indicating satellite ephemeris information of a communication satellite associated with the BS, a common timing advance (TA), and a compensated frequency offset (FO). The method further includes transmitting a physical random access channel (PRACH) based on the common TA and the compensated FO and receiving a random access response (RAR) indicating a UE-specific TA and FO. The method further includes, for transmission of an uplink (UL) channel, adjusting a TA and pre-compensating a FO based on the UE-specific TA and FO, respectively.
    Type: Grant
    Filed: June 28, 2021
    Date of Patent: October 24, 2023
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Shiyang Leng, Jeongho Jeon, Qiaoyang Ye, Joonyoung Cho, Caleb Lo
  • UPLINK TIMING AND FREQUENCY SYNCHRONIZATION
    Publication number: 20220046566
    Abstract: Methods and apparatuses for uplink timing and frequency synchronization in a wireless communication system. A method for operating a user equipment (UE) includes receiving, from a base station (BS), information indicating satellite ephemeris information of a communication satellite associated with the BS, a common timing advance (TA), and a compensated frequency offset (FO). The method further includes transmitting a physical random access channel (PRACH) based on the common TA and the compensated FO and receiving a random access response (RAR) indicating a UE-specific TA and FO. The method further includes, for transmission of an uplink (UL) channel, adjusting a TA and pre-compensating a FO based on the UE-specific TA and FO, respectively.
    Type: Application
    Filed: June 28, 2021
    Publication date: February 10, 2022
    Inventors: Shiyang Leng, Jeongho Jeon, Qiaoyang Ye, Joonyoung Cho, Caleb Lo