Patents by Inventor Zhifei Fan

Zhifei Fan 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: 11229033
    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) in communication with a serving base station may identify that the UE is a potential victim of interference from a neighboring base station. The UE may transmit an interference coordination message to the neighboring base station. The interference coordination message may request modification of one or more transmission parameters at the neighboring base station. The neighboring base station may modify its transmission parameters to decrease interference with the UE, and the UE may communicate with the serving base station after transmitting the interference coordination message.
    Type: Grant
    Filed: April 22, 2020
    Date of Patent: January 18, 2022
    Assignee: QUALCOMM Incorporated
    Inventors: Sungwoo Park, Arumugam Chendamarai Kannan, Vinay Chande, Srinivas Yerramalli, Tao Luo, Xiaoxia Zhang, Jing Sun, Kaushik Chakraborty, Sony Akkarakaran, Olufunmilola Omolade Awoniyi-Oteri, Zhifei Fan, Mostafa Khoshnevisan, Wooseok Nam
  • Patent number: 11229061
    Abstract: Methods, systems, and devices for wireless communications are described. A wireless device, such as a base station or a user equipment, may identify an energy detection threshold for a sensing beam associated with a channel access procedure, such as a listen-before-talk (LBT) procedure. The wireless device may also identify a set of transmit power parameters for one or more transmit beams. The wireless device may determine a degree of overlap between a beam shape of one or more transmit beams and a beam shape (e.g., a coverage area) of the sensing beam. The wireless device may adjust the set of transmit power parameters, the energy detection threshold, or a combination thereof based on the degree of overlap. The wireless device may perform the channel access procedure based on the determining, the adjusting, or both.
    Type: Grant
    Filed: May 21, 2020
    Date of Patent: January 18, 2022
    Assignee: QUALCOMM Incorporated
    Inventors: Srinivas Yerramalli, Arumugam Chendamarai Kannan, Vinay Chande, Sungwoo Park, Xiaoxia Zhang, Tao Luo, Kaushik Chakraborty, Olufunmilola Omolade Awoniyi-Oteri, Jing Sun, Mostafa Khoshnevisan, Sony Akkarakaran, Zhifei Fan
  • Publication number: 20220013118
    Abstract: Methods and system for testing a voice-enabled device. A signal generator generates a carrier signal having a variable resonant frequency, and a frequency mixer mixes an audible voice command signal with the carrier signal to generate an inaudible amplitude-modulated test signal. An antenna transmits the amplitude-modulated test signal at a variable attack angle to a voice-enabled device. The resonant frequency of the carrier signal and/or the attack angle of the transmitted amplitude-modulated signal are varied and at least one of a sensitive frequency and a sensitive attack angle of the voice-enabled device is identified.
    Type: Application
    Filed: June 16, 2021
    Publication date: January 13, 2022
    Applicant: The Curators of the University of Missouri
    Inventors: Chulsoon Hwang, Zhifei Xu, Jun Fan
  • Patent number: 11224034
    Abstract: A base station may access a channel following a successful channel access procedure. The base station may transmit an indication of a resource allocation to a user equipment (UE). The resource allocation may include an allocation of resources for subsequent communications between the base station and the UE, for example, defining a set of transmission time intervals (TTIs) during which the UE may transmit repetitions of uplink control information. The UE may also perform a channel access procedure to access the channel. The UE may transmit repetitions of the uplink control information using the set of TTIs according to the resource configuration. In some cases, the UE may stop transmitting uplink control information repetitions after a maximum number repetitions also according to the resource configuration. The base station may then receive and combine the uplink control information.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: January 11, 2022
    Assignee: QUALCOMM Incorporated
    Inventors: Wooseok Nam, Zhifei Fan, Tao Luo, Yan Zhou, Xiaoxia Zhang, Jing Sun
  • Publication number: 20210409180
    Abstract: Methods, systems, and devices for time domain single carrier (SC) waveform communications are described. A user equipment (UE) may generate an SC waveform by resampling (e.g., up-sampling) mapped information bits prior to insertion of a cyclic prefix (CP) or guard interval (GI). Performing resampling prior to CP/GI insertion allows for resource allocation flexibility and a base station may allocate resources for the SC waveform in accordance with this flexibility. For example, a base station may not be limited or restricted to a certain number of resources for SC waveform communications and may therefore determine a resource allocation for the UE based on the capability of the UE to perform resampling prior to CP/GI insertion. The resampling may be performed according to a set of parameters including a resampling ratio, which may be indicated to the UE via control signaling (e.g., from the base station).
    Type: Application
    Filed: September 8, 2021
    Publication date: December 30, 2021
    Inventors: Sungwoo Park, Srinivas Yerramalli, Wooseok Nam, Xiaoxia Zhang, Tao Luo, Jing Sun, Arumugam Chendamarai Kannan, Vinay Chande, Kaushik Chakraborty, Olufunmilola Omolade Awoniyi-Oteri, Sony Akkarakaran, Mostafa Khoshnevisan, Zhifei Fan
  • Patent number: 11202308
    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive control information indicating a resource allocation pattern for a downlink transmission that is configured for transmission using a plurality of beams and a plurality of mini-slots, where a duration of a mini-slot is less than a duration of a slot. The UE may identify a start time of a first mini-slot of the plurality of mini-slots and a length of the first mini-slot based on the resource allocation pattern, and receive the downlink transmission based on the start time of the first mini-slot and the length of the first mini-slot.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: December 14, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Kiran Venugopal, Makesh Pravin John Wilson, Tianyang Bai, Tao Luo, Xiaoxia Zhang, Zhifei Fan
  • Publication number: 20210368539
    Abstract: Methods, systems, and devices for wireless communications are described in which a user equipment (UE) may transmit a random access message (e.g., msgA or msg3) using a modulation and coding scheme (MCS) selected based on the frequency band and subcarrier spacing utilized for the random access procedure. The MCS may depend on the frequency band and a size of the SCS satisfying a threshold. In some cases, a base station may select and indicate the MCS for the UE. Additionally or alternatively, a phase tracking reference signal may be transmitted along with a random access message to correct for phase noise.
    Type: Application
    Filed: May 20, 2021
    Publication date: November 25, 2021
    Inventors: Ahmed Abdelaziz Ibrahim Abdelaziz Zewail, Xiaoxia Zhang, Tao Luo, Zhifei Fan, Jing Sun, Wooseok Nam, Mehmet Izzet Gurelli
  • Publication number: 20210359811
    Abstract: This disclosure provides systems, methods, and apparatuses, including computer programs encoded on computer storage media, for wireless communication. In one aspect of the disclosure, a method of wireless communication includes receiving, at a user equipment (UE) from a network entity or a second UE, multiple demodulation reference signals (DMRSs) including a first set of DMRSs allocated to a first DMRS symbol and a first subset of subcarriers and a second set of DMRSs allocated to a second DMRS symbol and a second subset of subcarriers. The method also includes receiving, from the network entity or the second UE, a phase tracking reference signal (PTRS) associated with the multiple DMRSs. The method further includes performing channel estimation based on the multiple DMRSs and a phase tracking process based on the multiple DMRSs and the PTRS. Other aspects and features are also claimed and described.
    Type: Application
    Filed: May 7, 2021
    Publication date: November 18, 2021
    Inventors: Ahmed Abdelaziz Ibrahim Abdelaziz Zewail, Xiaoxia Zhang, Tao Luo, Jing Sun, Zhifei Fan
  • Publication number: 20210359817
    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit an indication of a capability of the UE to communicate one or more of uplink communications or downlink communications that include data-modulated demodulation reference signals (DMRSs) in which each of one or more resources of a plurality of resources of the uplink communications or the downlink communications carry both at least a portion of a DMRS sequence and data. The UE may transmit an uplink communication or receive a downlink communication that includes the data-modulated DMRSs. Numerous other aspects are provided.
    Type: Application
    Filed: May 12, 2021
    Publication date: November 18, 2021
    Inventors: Wooseok NAM, Juan MONTOJO, Tao LUO, Ahmed Abdelaziz Ibrahim Abdelaziz ZEWAIL, Zhifei FAN, Xiaoxia ZHANG, Jing SUN, Arumugam CHENDAMARAI KANNAN
  • Publication number: 20210359810
    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may map a code block to resources, of a physical shared channel, that are allocated for data-modulated demodulation reference signals (DMRSs) in which each of the resources carries both at least a portion of a DMRS sequence and data. The wireless communication device may transmit a communication, via the physical shared channel, that includes the code block that is mapped to the resources that are allocated for the data-modulated DMRSs. Numerous other aspects are provided.
    Type: Application
    Filed: May 12, 2021
    Publication date: November 18, 2021
    Inventors: Wooseok NAM, Tao LUO, Juan MONTOJO, Jing SUN, Xiaoxia ZHANG, Zhifei FAN, Ahmed Abdelaziz Ibrahim Abdelaziz ZEWAIL, Sungwoo PARK
  • Publication number: 20210359790
    Abstract: Certain aspects may be implemented in a method for wireless communication. The method generally includes determining a counter downlink assignment index (cDAI) to be included in each of a plurality of downlink control information (DCI), each of a first subset of the plurality of DCI being on a control channel, and each of a second subset of the plurality of DCI being on a data channel, each of the first subset of the plurality of DCI scheduling one of the data channels, and wherein each of the control channels and the data channels is on a cell of a plurality of cells, the determination of the cDAIs being based on order of the cell, with respect to the plurality of cells, on which each of the cDAIs is to be transmitted; generating and outputting for transmission the control channels and data channels in accordance with the determination.
    Type: Application
    Filed: February 25, 2021
    Publication date: November 18, 2021
    Inventors: Srinivas YERRAMALLI, Jing SUN, Xiaoxia ZHANG, Tao LUO, Qiang WU, Zhifei FAN, Arumugam CHENDAMARAI KANNAN, Sungwoo PARK, Wooseok NAM
  • Publication number: 20210359818
    Abstract: Wireless communication techniques that include PTRS resource density recommendation and selection techniques are discussed. A UE may transmit to a base station a set of phase tracking reference signal (PTRS) resource density recommendations that are determined based, at least in part, on a block error rate (BLER). The base station may transmit to the UE an indication of PTRS resource densities to use for wireless communication of the PTRS based, at least in part, on the BLER associated with the received set of PTRS resource density recommendations. The base station and/or the UE may at least one of receive or transmit a PTRS based, at least in part, on the indicated PTRS resource densities. Other aspects and features are also claimed and described.
    Type: Application
    Filed: May 12, 2021
    Publication date: November 18, 2021
    Inventors: Ahmed Abdelaziz Ibrahim Abdelaziz Zewail, Xiaoxia Zhang, Zhifei Fan, Jing Sun, Tao Luo
  • Publication number: 20210360659
    Abstract: A configuration to allow for scheduling communication with a UE having associated characteristics based on a timing indication. The apparatus receives, from a UE, a timing indication associated with a bandwidth, a subcarrier spacing, or a waveform. The timing indication identifying a delay duration based on a processing timeline for the UE. The apparatus receives from the UE, or transmits to the UE, a first data channel having the bandwidth, the subcarrier spacing, or the waveform scheduled based on the timing indication. The first data channel is transmitted or received at a first time based on the timing indication.
    Type: Application
    Filed: January 29, 2021
    Publication date: November 18, 2021
    Inventors: Xiaoxia ZHANG, Tao LUO, Jing SUN, Wooseok NAM, Qiang WU, Srinivas YERRAMALLI, Zhifei FAN, Arumugam CHENDAMARAI KANNAN
  • Publication number: 20210359807
    Abstract: Aspects described herein relate to a user equipment (UE) determining a reference signal port of multiple configured reference signal ports to use in transmitting a reference signal for a random access message. In one aspect, a configuration indicating multiple reference signal ports to use in transmitting reference signals for a random access message can be transmitted to the UE, as well as an indication of a reference signal port of the multiple reference signal ports to be used in transmitting a reference signal for the random access message.
    Type: Application
    Filed: March 31, 2021
    Publication date: November 18, 2021
    Inventors: Ahmed Abdelaziz Ibrahim Abdelaziz ZEWAIL, Xiaoxia ZHANG, Tao LUO, Jing SUN, Zhifei FAN
  • Publication number: 20210360675
    Abstract: Certain aspects of the present disclosure provide techniques for scheduling chain design. Certain aspects of the subject matter described in this disclosure can be implemented in a method for wireless communication. The method generally includes determining a limit associated with a quantity of a plurality of downlink control information (DCI) for each of at least one scheduling chain, each of at least one of the plurality of DCI to be transmitted on one of a plurality of data channels, and wherein each of the plurality of DCI in the scheduling chain schedules another one of the plurality of data channels; and transmitting the plurality of DCI on the plurality of data channels in accordance with the determination to a user-equipment (UE).
    Type: Application
    Filed: February 25, 2021
    Publication date: November 18, 2021
    Inventors: Srinivas YERRAMALLI, Jing SUN, Xiaoxia ZHANG, Tao LUO, Arumugam CHENDAMARAI KANNAN, Qiang WU, Sungwoo PARK, Zhifei FAN, Wooseok NAM
  • Publication number: 20210352698
    Abstract: Methods, systems, and devices for wireless communications are described. In a first example, the user equipment (UE) may receive sidelink control information scheduling resources for a sidelink data transmission spanning a set of tones and indicating a demodulation reference signal (DMRS) pattern. The UE may identify that each tone of the set of tones is configured to carry a DMRS for a symbol of the DMRS pattern and may receive the sidelink data transmission based on the symbol of the DMRS pattern carrying the DMRS for each tone. In a second example, the UE may receive control signaling indicating a configuration for a non-overlapping relationship between a first resource for receiving a DMRS and a second resource for receiving a phase tracking reference signal. The UE may receive the DMRS over the first resource and the phase tracking reference signal over the second resource based on the non-overlapping relationship.
    Type: Application
    Filed: April 29, 2021
    Publication date: November 11, 2021
    Inventors: Ahmed Abdelaziz Ibrahim Abdelaziz Zewail, Zhifei Fan, Xiaoxia Zhang, Jing Sun, Tao Luo
  • Publication number: 20210352631
    Abstract: A base station transmits a first downlink control information (DCI) portion in a physical downlink control channel (PDCCH), wherein the first DCI portion indicates a second DCI portion. The base station jointly encodes multiple component DCIs, each of the component DCIs providing a resource allocation in combination with the first DCI portion. The apparatus transmits the second DCI portion comprising the jointly encoded multiple component DCIs in a physical downlink shared channel (PDSCH).
    Type: Application
    Filed: May 6, 2020
    Publication date: November 11, 2021
    Inventors: Zhifei Fan, Jing Sun, Xiaoxia Zhang, Tao Luo, Srinivas Yerramalli, Wooseok Nam, Sungwoo Park, Arumugam Chendamarai Kannan
  • Publication number: 20210352659
    Abstract: A method of wireless communication may include transmitting an uplink slot with a first control region, a second control region, and (e.g., optionally) a data region. Each region may include time resources and frequency resources. Transmitting the uplink slot may include transmitting the first control region in an earlier part of the uplink slot and transmitting the second control region (e.g., and the data region) in a later part of the uplink slot. The first control region may include time-critical control information and the second control region may include non-time-critical control information. A receiver receiving the uplink slot may receive the first control region before receiving the data region and the second control region.
    Type: Application
    Filed: July 23, 2021
    Publication date: November 11, 2021
    Inventors: Sony Akkarakaran, Tao Luo, Xiaoxia Zhang, Zhifei Fan, Juan Montojo
  • Publication number: 20210337575
    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine an increased bandwidth configuration for an enhanced physical uplink control channel (ePUCCH) based at least in part on an ePUCCH format of the ePUCCH, wherein the increased bandwidth configuration uses a plurality of contiguous resource blocks (RBs) for the ePUCCH; and transmit the ePUCCH using the increased bandwidth configuration. Numerous other aspects are provided.
    Type: Application
    Filed: April 22, 2021
    Publication date: October 28, 2021
    Inventors: Xiaoxia ZHANG, Zhifei FAN, Ahmed Abdelaziz Ibrahim Abdelaziz ZEWAIL, Jing SUN, Juan MONTOJO, Tao LUO
  • Publication number: 20210321382
    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may identify a beam switching capability for a subcarrier spacing for communications between the UE and a base station. In one example, the beam switching capability may indicate a quantity of beam switches for a plurality of slots of a transmission time interval. In another example, the capability may indicate a threshold quantity of symbol periods between beam switching operations associated with the subcarrier spacing, or a beam switching time for the subcarrier spacing, or both. The UE may determine, for the identified beam switching capability, one or more parameter values that indicate the identified beam switching capability. The parameters may explicitly or implicitly indicate the identified capability. The UE may also transmit the determined one or more parameter values to the base station and communicate with the base station according to the identified beam switching capability.
    Type: Application
    Filed: April 8, 2021
    Publication date: October 14, 2021
    Inventors: Wooseok Nam, Tao Luo, Xiaoxia Zhang, Jing Sun, Zhifei Fan, Juan Montojo, Sungwoo Park, Ahmed Abdelaziz Ibrahim A Zewall