Patents by Inventor Allan Yingming Tsai

Allan Yingming Tsai 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: 20250212127
    Abstract: Open loop power control may be based on an estimated pathloss. A set of transmission and reception points (TRPs) may provide a set of reference signals (RSs) to a reference point (RP). The RP, and/or the RP in conjunction with a network with which the RP is associated, may determine a RSRP for each received RS (signature of RSRPs). A WTRU may be configured with the signature of RSRPs. The TRP may provide the set of RSs to the WTRU. The WTRU may determine a set of RSRPs for the received RSs (RSRPWTRU). The WTRU may determine a difference between the signature RSs and RSRPWTRU. The WTRU may determine an estimated uplink pathloss associated with the WTRU and the RP based on the determined difference. The determined pathloss may be utilized in open-loop power control.
    Type: Application
    Filed: April 4, 2023
    Publication date: June 26, 2025
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Patrick Svedman, Arman Shojaeifard, Allan Yingming Tsai, Kyle Jung-Lin Pan, Guodong Zhang
  • Publication number: 20250202539
    Abstract: A WTRU may detect a reflected SSB transmission from a RIS. The reflected SSB is associated with an index. The WTRU may determine a source device of the reflected SSB transmission based on the index. For example, the WTRU may determine that the reflected SSB transmission was reflected by the RIS based on the index associated with the RIS. The WTRU may perform a random access procedure with a network device via the RIS based on the index. The SSB transmission may be associated with an SSB burst transmission comprising a plurality of SSB transmissions, where each of the plurality of SSB transmissions may be associated with the index. The plurality of SSB transmissions may comprise SSB transmissions reflected by the RIS and/or SSB transmissions not reflected by the RIS. The spatial state of the RIS may be maintained constant and/or may change during the SSB burst transmission.
    Type: Application
    Filed: April 3, 2023
    Publication date: June 19, 2025
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Ibrahim Hemadeh, Allan Yingming Tsai, Patrick Svedman, Deepa Gurmukhdas Jagyasi, Kyle Jung-Lin Pan, Tezcan Cogalan, Guodong Zhang, Arman Shojaeifard
  • Publication number: 20250175371
    Abstract: Disclosed herein are a plurality of embodiments addressing wireless communications, where one or more of the embodiments specifically address phase noise (PN) compensation techniques in which multiple groups of reference symbols are transmitted by computed splitting of the allocated Physical Resource Block(s) (PRBs) in suitable groups of sizes (e.g., equal or lower than the channel's coherence bandwidth), and ensuring the frequency domain circular symmetric transmission from the transmitting entity side adding the cyclic sub-carriers to each group. There may be one or more designs of techniques to choose suitable numbers and sizes of groups to enable suitable level of PN compensation at a receiving entity and provide various methods to ensure circular symmetry within each group. One or more approaches may be able to adapt to the instantaneous channel conditions and PN characteristics of the transceivers on a per-user basis.
    Type: Application
    Filed: May 26, 2023
    Publication date: May 29, 2025
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Javier Lorca Hernando, Umer Salim, Pascal Adjakple, Hussain Elkotby, Ahmet Serdar Tan, Onur Sahin, Allan Yingming Tsai, Arman Shojaeifard
  • Publication number: 20210289459
    Abstract: A method and wireless transmit/receive unit (WTRU) include a WTRU configured to search a frequency bandwidth, out of a set of potential frequency bandwidths, for synchronization signals. The frequency bandwidth includes a secondary synchronization signal in subcarriers. Other subcarriers in the frequency bandwidth outside of the secondary synchronization signal include data. The WTRU is configured to synchronize using the secondary synchronization signal in the frequency bandwidth.
    Type: Application
    Filed: May 28, 2021
    Publication date: September 16, 2021
    Applicant: InterDigital Technology Corporation
    Inventors: Guodong Zhang, Kyle Jung-Lin Pan, Allan Yingming Tsai
  • Patent number: 11026201
    Abstract: A method and apparatus for synchronization in an orthogonal frequency division multiplexing (OFDM) network is disclosed. A wireless transmit/receive unit (WTRU) is configured to receive a primary synchronization signal and a secondary synchronization signal from a cell. The primary synchronization signal and the secondary synchronization signal are spaced by a known number of OFDM symbols. The primary synchronization signal and the secondary synchronization signal are received in a same number of subcarriers in their respective OFDM symbol. A location of at least the secondary synchronization signal in the system bandwidth is variable.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: June 1, 2021
    Assignee: InterDigital Technology Corporation
    Inventors: Guodong Zhang, Kyle Jung-Lin Pan, Allan Yingming Tsai
  • Publication number: 20190075533
    Abstract: A method and apparatus for synchronization in an orthogonal frequency division multiplexing (OFDM) network is disclosed. A wireless transmit/receive unit (WTRU) is configured to receive a primary synchronization signal and a secondary synchronization signal from a cell. The primary synchronization signal and the secondary synchronization signal are spaced by a known number of OFDM symbols. The primary synchronization signal and the secondary synchronization signal are received in a same number of subcarriers in their respective OFDM symbol. A location of at least the secondary synchronization signal in the system bandwidth is variable.
    Type: Application
    Filed: November 5, 2018
    Publication date: March 7, 2019
    Applicant: InterDigital Technology Corporation
    Inventors: Guodong Zhang, Kyle Jung-Lin Pan, Allan Yingming Tsai
  • Patent number: 10123293
    Abstract: A user equipment (UE) may detect a primary synchronization signal and a secondary synchronization signal. The secondary synchronization signal may be derived from a shift of a sequence and sectors and cells may have different shifts of the sequence. A UE may determine, based on the detected primary synchronization signal and the secondary synchronization signal, an identity of a cell.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: November 6, 2018
    Assignee: INTERDIGITAL TECHNOLOGY CORPORATION
    Inventors: Guodong Zhang, Kyle Jung-Lin Pan, Allan Yingming Tsai
  • Publication number: 20160227498
    Abstract: A method and apparatus for synchronization in an orthogonal frequency division multiple access (OFDMA) evolved universal terrestrial radio access (E-UTRA) system including at least one base station and a plurality of wireless transmit/receive units (WTRUs). A secondary synchronization channel (S-SCH) symbol is generated to include cell-specific information. The S-SCH symbol is mapped to the center of the available bandwidth of the system. In one embodiment, the S-SCH symbol is transmitted on different subcarriers at different sectors in the system. In another embodiment, the S-SCH symbol is transmitted on the same subcarriers at different sectors in the system.
    Type: Application
    Filed: April 8, 2016
    Publication date: August 4, 2016
    Applicant: InterDigital Technology Corporation
    Inventors: Guodong Zhang, Kyle Jung-Lin Pan, Allan Yingming Tsai
  • Patent number: 9313064
    Abstract: A method and apparatus for synchronization in an orthogonal frequency division multiple access (OFDMA) evolved universal terrestrial radio access (E-UTRA) system including at least one base station and a plurality of wireless transmit/receive units (WTRUs). A secondary synchronization channel (S-SCH) symbol is generated to include cell-specific information. The S-SCH symbol is mapped to the center of the available bandwidth of the system. In one embodiment, the S-SCH symbol is transmitted on different subcarriers at different sectors in the system. In another embodiment, the S-SCH symbol is transmitted on the same subcarriers at different sectors in the system.
    Type: Grant
    Filed: April 16, 2007
    Date of Patent: April 12, 2016
    Assignee: InterDigital Technology Corporation
    Inventors: Guodong Zhang, Kyle Jung-Lin Pan, Allan Yingming Tsai
  • Patent number: 8798212
    Abstract: A method and apparatus for processing feedback implemented in a wireless transmit/receive unit (WTRU) comprises estimating a channel matrix. The effective channel is calculated and a precoding matrix is selected. Feedback bits are generated and transmitted.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: August 5, 2014
    Assignee: Interdigital Technology Corporation
    Inventors: Kyle Jung-Lin Pan, Allan Yingming Tsai
  • Publication number: 20130294536
    Abstract: The disclosed method and apparatus include an WTRU-specific reference signal scheme that provides efficient precoded pilot transmission and effective channel estimation using dedicated pilot signals. The disclosed methods are efficient for both a single user (SU) and a multi user (MU) Multiple Input Multiple Output (MIMO) system.
    Type: Application
    Filed: July 1, 2013
    Publication date: November 7, 2013
    Inventors: Kyle Jung-Lin Pan, Allan Yingming Tsai
  • Patent number: 8477863
    Abstract: The disclosed method and apparatus include an WTRU-specific reference signal scheme that provides efficient precoded pilot transmission and effective channel estimation using dedicated pilot signals. The disclosed methods are efficient for both a single user (SU) and a multi user (MU) Multiple Input Multiple Output (MIMO) system.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: July 2, 2013
    Assignee: InterDigital Technology Corporation
    Inventors: Kyle Jung-Lin Pan, Allan Yingming Tsai
  • Publication number: 20080279156
    Abstract: A secondary synchronization channel (S-SCH) for E-UTRA downlink is applied to any orthogonal frequency division multiple access (OFDMA) based system to reduce interference on S-SCHs among sectors of the same Node-B in an evolved universal terrestrial radio access (E-UTRA) system.
    Type: Application
    Filed: May 2, 2008
    Publication date: November 13, 2008
    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION
    Inventors: Allan Yingming Tsai, Guodong Zhang, Kyle Jung-Lin Pan
  • Publication number: 20080232493
    Abstract: A method of providing transmit diversity for a secondary synchronization channel (S-SCH) includes generating a S-SCH signal, performing a frequency switched transmit diversity (FSTD) process on the S-SCH signal to create a first processed signal, performing a precoding vector switching (PVS) process on the first processed signal to create a processed S-SCH signal, and transmitting the processed S-SCH signal.
    Type: Application
    Filed: March 19, 2008
    Publication date: September 25, 2008
    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION
    Inventors: Guodong Zhang, Kyle Jung-Lin Pan, Allan Yingming Tsai
  • Publication number: 20080225822
    Abstract: A method for transmitting feedback information for a wireless transmit receive unit (WTRU) includes multiplexing the feedback information with an uplink shared channel, mapping the multiplexed feedback information to orthogonal frequency division multiplex (OFDM) symbols and transmitting the feedback information to an e Node B. The method also includes multiplexing the feedback information with the uplink shared channel using distributed frequency division multiplexing (FDM), mapping the feedback information to a first OFDM symbol, and distributing the mapped feedback information equidistantly across the transmission bandwidth.
    Type: Application
    Filed: March 14, 2008
    Publication date: September 18, 2008
    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION
    Inventors: Guodong Zhang, Robert Lind Olesen, Allan Yingming Tsai, Donald M. Grieco
  • Publication number: 20080212702
    Abstract: The disclosed method and apparatus include an WTRU-specific reference signal scheme that provides efficient precoded pilot transmission and effective channel estimation using dedicated pilot signals. The disclosed methods are efficient for both a single user (SU) and a multi user (MU) Multiple Input Multiple Output (MIMO) system.
    Type: Application
    Filed: February 19, 2008
    Publication date: September 4, 2008
    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION
    Inventors: Kyle Jung-Lin Pan, Allan Yingming Tsai
  • Publication number: 20080187062
    Abstract: Disclosed are a method and apparatus for generating feedback in multiple-input/multiple-output (MIMO) communications.
    Type: Application
    Filed: February 6, 2008
    Publication date: August 7, 2008
    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION
    Inventors: Kyle Jung-Lin Pan, Allan Yingming Tsai
  • Publication number: 20080130484
    Abstract: In a communications system with a wireless transmit/receive unit and a cell, a method for transmission of a broadcast channel is presented. The method contains the steps of generating a broadcast signal, processing said broadcast signal according to a modified spatial frequency block coding scheme, and broadcasting the processed signal to a wireless transmit/receive unit.
    Type: Application
    Filed: October 31, 2007
    Publication date: June 5, 2008
    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION
    Inventors: Guodong Zhang, Kyle Jung-Lin Pan, Robert Lind Olesen, Allan Yingming Tsai
  • Publication number: 20080112500
    Abstract: A method and apparatus for processing feedback implemented in a wireless transmit/receive unit (WTRU) comprises estimating a channel matrix. The effective channel is calculated and a precoding matrix is selected. Feedback bits are generated and transmitted.
    Type: Application
    Filed: October 30, 2007
    Publication date: May 15, 2008
    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION
    Inventors: Kyle Jung-Lin Pan, Allan Yingming Tsai