Patents by Inventor Michael Mao Wang

Michael Mao Wang 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).

  • Patent number: 11722969
    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may determine separate uplink (UL) power limitations for multiple transmission time interval (TTI) durations based on distinct power control parameters. In some cases, an adjustment factor or a power backoff may be applied to communications using one TTI duration to ensure that total transmit power does not exceed a threshold. The UE and the serving base station may also identify one or more demodulation reference signal (DMRS) windows. UL data transmissions may be demodulated based on a DMRS sent during the same window. Transmit power control (TPC) commands may be applied at the beginning of each window. However, if an UL transmission is scheduled at the beginning of the window, the UE may wait until a DMRS transmission or until no more transmissions are scheduled for the window before applying the TPC adjustment.
    Type: Grant
    Filed: January 8, 2021
    Date of Patent: August 8, 2023
    Assignee: QUALCOMM Incorporated
    Inventors: Shimman Arvind Patel, Wanshi Chen, Peter Gaal, Hao Xu, Michael Mao Wang
  • Patent number: 11581999
    Abstract: Methods, systems, and devices are described for reference signal design in wireless communications. A base station may select a reference signal density scheme from a set of available density schemes associated with a port count. The reference signal density scheme may also be selected based on the category of the mobile device receiving the reference signal transmissions. The reference signal density scheme may be a higher density reference signal density scheme or a lower density reference signal density scheme, where the higher density reference signal density scheme includes more reference signal resource elements per subframe. The mobile device may determine the reference signal density scheme based on characteristics of a channel. The higher density reference signal density scheme may provide additional channel estimation opportunities for the mobile device. In some cases, the mobile device sends the channel estimated based on the received reference signals to the base station.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: February 14, 2023
    Assignee: QUALCOMM Incorporated
    Inventors: Wanshi Chen, Michael Mao Wang, Hao Xu, Yongbin Wei, Peter Gaal
  • Patent number: 11323994
    Abstract: Aspects of the present disclosure provide techniques that may be applied in systems to allow for communication over a control channel utilizing a relatively narrow band (e.g., six physical resource blocks) based search space. An exemplary method, performed by a user equipment, generally includes identifying, within a subframe, a first search space to monitor for a downlink control channel that occupies a first number of physical resource blocks (PRBs) that represents a narrowband size and monitoring at least the first search space for the downlink control channel transmitted in the subframe.
    Type: Grant
    Filed: April 1, 2020
    Date of Patent: May 3, 2022
    Assignee: QUALCOMM Incorporated
    Inventors: Wanshi Chen, Hao Xu, Michael Mao Wang, Peter Gaal
  • Patent number: 11191040
    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may determine separate uplink (UL) power limitations for multiple transmission time interval (TTI) durations based on distinct power control parameters. In some cases, an adjustment factor or a power backoff may be applied to communications using one TTI duration to ensure that total transmit power does not exceed a threshold. The UE and the serving base station may also identify one or more demodulation reference signal (DMRS) windows. UL data transmissions may be demodulated based on a DMRS sent during the same window. Transmit power control (TPC) commands may be applied at the beginning of each window. However, if an UL transmission is scheduled at the beginning of the window, the UE may wait until a DMRS transmission or until no more transmissions are scheduled for the window before applying the TPC adjustment.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: November 30, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Shimman Arvind Patel, Wanshi Chen, Peter Gaal, Hao Xu, Michael Mao Wang
  • Publication number: 20210127340
    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may determine separate uplink (UL) power limitations for multiple transmission time interval (TTI) durations based on distinct power control parameters. In some cases, an adjustment factor or a power backoff may be applied to communications using one TTI duration to ensure that total transmit power does not exceed a threshold. The UE and the serving base station may also identify one or more demodulation reference signal (DMRS) windows. UL data transmissions may be demodulated based on a DMRS sent during the same window. Transmit power control (TPC) commands may be applied at the beginning of each window. However, if an UL transmission is scheduled at the beginning of the window, the UE may wait until a DMRS transmission or until no more transmissions are scheduled for the window before applying the TPC adjustment.
    Type: Application
    Filed: January 8, 2021
    Publication date: April 29, 2021
    Inventors: Shimman Arvind Patel, Wanshi Chen, Peter Gaal, Hao Xu, Michael Mao Wang
  • Patent number: 10728914
    Abstract: Certain aspects of the present disclosure generally relate to wireless communications, and more specifically to determining uplink narrowband regions based on downlink resources. An example method generally includes identifying one or more uplink narrowband regions within a wider system bandwidth, based on downlink resources, and communicating using at least one of the identified narrowbands.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: July 28, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Seyed Ali Akbar Fakoorian, Alberto Rico Alvarino, Wanshi Chen, Michael Mao Wang, Hao Xu
  • Publication number: 20200229168
    Abstract: Aspects of the present disclosure provide techniques that may be applied in systems to allow for communication over a control channel utilizing a relatively narrow band (e.g., six physical resource blocks) based search space. An exemplary method, performed by a user equipment, generally includes identifying, within a subframe, a first search space to monitor for a downlink control channel that occupies a first number of physical resource blocks (PRBs) that represents a narrowband size and monitoring at least the first search space for the downlink control channel transmitted in the subframe.
    Type: Application
    Filed: April 1, 2020
    Publication date: July 16, 2020
    Inventors: Wanshi CHEN, Hao XU, Michael Mao WANG, Peter GAAL
  • Patent number: 10645681
    Abstract: Aspects of the present disclosure provide techniques that may be applied in systems to allow for communication over a control channel utilizing a relatively narrow band (e.g., six physical resource blocks) based search space. An exemplary method, performed by a user equipment, generally includes identifying, within a subframe, a first search space to monitor for a downlink control channel that occupies a first number of physical resource blocks (PRBs) that represents a narrowband size and monitoring at least the first search space for the downlink control channel transmitted in the subframe.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: May 5, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Wanshi Chen, Hao Xu, Michael Mao Wang, Peter Gaal
  • Patent number: 10448405
    Abstract: Certain aspects of the present disclosure relate to methods and apparatus for mitigating resource conflicts between ultra low latency (ULL) and legacy transmissions. A base station may determine a region of a subframe having overlapping resource allocations for a first device of a first type (e.g., ULL device) and a second device of a second type (e.g., legacy device), wherein the first device of the first type has a capability to perform certain procedures with low latency relative to the second device of the second type that lacks the capability. The base station may modulate data from the region of the subframe for transmission to the first and the second devices, using a hierarchical modulation scheme.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: October 15, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Shimman Arvind Patel, Wanshi Chen, Durga Prasad Malladi, Peter Gaal, Hao Xu, Michael Mao Wang
  • Patent number: 10448236
    Abstract: Base stations (such as small cells) may support active and dormant states. To facilitate state transitions, these cells may transmit discovery signals. The transmission design of both discovery signals and network synchronization signals from small cells should provide for regular periodicity, while supporting the benefit of transitioning between active and dormant states. Disclosed is a method, a computer program product, and an apparatus that determine a first reference signal for at least one of discovery or measurement, and a second reference signal for synchronization, where both the first reference signal and the second reference signal are based on a same type of reference signal.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: October 15, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Wanshi Chen, Peter Gaal, Aleksandar Damnjanovic, Michael Mao Wang
  • Patent number: 10440771
    Abstract: Methods for managing hybrid automatic repeat request (HARQ) feedback are disclosed, where HARQ feedback operations by a receiving device may be modified. A receiving device may receive a data transmission. The receiving device may evaluate a condition for determining how to provide HARQ feedback in response to the data transmission. The receiving device may modify a HARQ feedback operation based at least in part on the condition. Modification of HARQ feedback operations may include turning off HARQ feedback, excluding negative acknowledgment (NAK) reporting, or excluding acknowledgement (ACK) reporting.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: October 8, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Wanshi Chen, Durga Prasad Malladi, Aleksandar Damnjanovic, Shimman Arvind Patel, Madhavan Srinivasan Vajapeyam, Michael Mao Wang, Hao Xu, Peter Gaal
  • Patent number: 10243713
    Abstract: Methods, systems, and devices are described for wireless communication at a device. Demodulation reference signals (DMRS) may be used to facilitate demodulation of low latency control or data channels, or both. A wireless communication device may, for example, identify a carrier configuration with transmission time intervals (TTIs) of different durations. A carrier may be configured with TTIs that support low latency operations. A DMRS pattern for resources of a low latency TTI may be determined, and that first DMRS pattern may be based on a DMRS pattern for resources of another, longer-duration TTI. Devices may thus communicate using resources of a low latency TTI based on the first DMRS pattern. For example, a user equipment (UE) may demodulate resources of a low latency channel using the first DMRS pattern, and the first DMRS pattern may be consistent with DMRS patterns supporting non-low latency within a common wireless system.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: March 26, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Wanshi Chen, Shimman Arvind Patel, Peter Gaal, Hao Xu, Michael Mao Wang
  • Publication number: 20190075528
    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may determine separate uplink (UL) power limitations for multiple transmission time interval (TTI) durations based on distinct power control parameters. In some cases, an adjustment factor or a power backoff may be applied to communications using one TTI duration to ensure that total transmit power does not exceed a threshold. The UE and the serving base station may also identify one or more demodulation reference signal (DMRS) windows. UL data transmissions may be demodulated based on a DMRS sent during the same window. Transmit power control (TPC) commands may be applied at the beginning of each window. However, if an UL transmission is scheduled at the beginning of the window, the UE may wait until a DMRS transmission or until no more transmissions are scheduled for the window before applying the TPC adjustment.
    Type: Application
    Filed: November 7, 2018
    Publication date: March 7, 2019
    Inventors: Shimman Arvind Patel, Wanshi Chen, Peter Gaal, Hao Xu, Michael Mao Wang
  • Patent number: 10165536
    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may identify a set of non-overlapping periodic intervals for monitoring a synchronization signal, which may be composed of or may include a repeated sequence; and the UE may identify possible timing structure (e.g., subframe, slot, etc.) boundaries using the intervals. The UE may then determine that one of the possible boundaries is a boundary using a second synchronization signal. For instance, the UE may perform a cumulative correlation during each of a series of correlation periods corresponding to the periodic intervals. Each of the cumulative correlations may contain multiple coherent correlations associated with the sequence repetitions. From the cumulative correlations, the UE may identify possible boundaries. The UE may perform a secondary correlation based on a second synchronization signal for each possible boundary in order to determine the system timing.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: December 25, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Michael Mao Wang, Hao Xu, Peter Gaal, Wanshi Chen, Yongbin Wei
  • Patent number: 10149255
    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may determine separate uplink (UL) power limitations for multiple transmission time interval (TTI) durations based on distinct power control parameters. In some cases, an adjustment factor or a power backoff may be applied to communications using one TTI duration to ensure that total transmit power does not exceed a threshold. The UE and the serving base station may also identify one or more demodulation reference signal (DMRS) windows. UL data transmissions may be demodulated based on a DMRS sent during the same window. Transmit power control (TPC) commands may be applied at the beginning of each window. However, if an UL transmission is scheduled at the beginning of the window, the UE may wait until a DMRS transmission or until no more transmissions are scheduled for the window before applying the TPC adjustment.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: December 4, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Shimman Arvind Patel, Wanshi Chen, Peter Gaal, Hao Xu, Michael Mao Wang
  • Patent number: 10111113
    Abstract: A wireless device may determine a coverage enhancement (CE) level (or coverage extension) by attempting to decode a received broadcast signal. The wireless device may attempt to decode a portion of the broadcast signal using a CE level that is less than the CE level of the broadcast. If the decoding attempt is successfully, the CE level may be declared as an operating CE level. If decoding is unsuccessful, the CE level may be increased decoding retried. The wireless device may continue to test-decode the broadcast signal at new (e.g., increasing) CE levels until a CE level is sufficient for a decode and is declared the operating CE level of the wireless device. In some cases, the wireless device test-decodes a broadcast channel after selecting a CE level based on a path loss measurement of a downlink signal (e.g., reference signal).
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: October 23, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Michael Mao Wang, Hao Xu, Peter Gaal, Wanshi Chen, Yongbin Wei
  • Patent number: 10110363
    Abstract: Methods, systems, and devices for wireless communication are described. A wireless system utilizing one or more time-division duplexing (TDD) configured carriers may utilize a dual transmission time interval (TTI) structure (e.g., at the subframe level and symbol-level). The symbol level TTIs may be referred to as low latency (LL) TTIs, and may be organized within LL subframes. A LL subframe may be a subframe that is scheduled for transmissions in one direction (e.g., uplink or downlink, according to a TDD configuration) and may include multiple LL symbols scheduled for both uplink (UL) and downlink (DL) transmissions. Guard periods may be scheduled between adjacent LL symbols that have opposite directions of transmission to enable user equipment (UEs) to transition from receiving mode to transmit mode (or vice versa). The LL subframes may be transparent to receiving devices that do not support LL operations.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: October 23, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Wanshi Chen, Durga Prasad Malladi, Peter Gaal, Yongbin Wei, Hao Xu, Shimman Arvind Patel, Tao Luo, Michael Mao Wang
  • Patent number: 10075266
    Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus generates a data transport block, divides the data transport block into a number of sub-blocks. The sub-blocks include at least a first sub-block and a second sub-block, where a size of the first sub-block is different than a size of the second sub-block. The apparatus may encode the number of sub-blocks using different code rates and/or different coding schemes. The apparatus may modulate the encoded sub-blocks using different modulation orders. The apparatus transmits the sub-blocks to a receiver.
    Type: Grant
    Filed: October 6, 2014
    Date of Patent: September 11, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Tao Luo, Peter Gaal, Wanshi Chen, Aleksandar Damnjanovic, Hao Xu, Michael Mao Wang
  • Patent number: 9985762
    Abstract: Base stations (such as small cells) may support active and dormant states. To facilitate state transitions, these cells may transmit discovery signals. The transmission design of both discovery signals and network synchronization signals from small cells should provide for regular periodicity, while supporting the benefit of transitioning between active and dormant states. Disclosed is a method, a computer program product, and an apparatus that determine a first reference signal for at least one of discovery or measurement, and a second reference signal for synchronization, where both the first reference signal and the second reference signal are based on a same type of reference signal.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: May 29, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Wanshi Chen, Peter Gaal, Aleksandar Damnjanovic, Michael Mao Wang
  • Patent number: 9832629
    Abstract: Base stations (such as small cells) may support active and dormant states. To facilitate state transitions, these cells may transmit discovery signals. The transmission design of both discovery signals and network synchronization signals from small cells should provide for regular periodicity, while supporting the benefit of transitioning between active and dormant states. Disclosed is a method, a computer program product, and an apparatus that determine a first reference signal for at least one of discovery or measurement, and a second reference signal for synchronization, where both the first reference signal and the second reference signal are based on a same type of reference signal.
    Type: Grant
    Filed: December 29, 2014
    Date of Patent: November 28, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Wanshi Chen, Peter Gaal, Aleksandar Damnjanovic, Michael Mao Wang