Patents by Inventor Tingfang Ji

Tingfang Ji 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: 10602515
    Abstract: Various aspects of the disclosure relate to scaled numerology for orthogonal frequency division multiplexing (OFDM) waveforms or other forms of communication. First information can be encoded into a first numerology at a first set of tones and first synchronization information can be encoded into a second numerology at second set of tones. In addition, second synchronization information can be encoded into a guard band in such a way that this information can be interpreted under either the first numerology or the second numerology.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: March 24, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Hung Ly, Jing Jiang, Tingfang Ji
  • Publication number: 20200092056
    Abstract: Methods, systems, and devices for wireless communications are described that provide sequences of spreading codes and hopping patterns that may be used in non-orthogonal multiple access (NOMA) communications between a user equipment (UE) and a base station. A codebook of spreading codes and the associated hopping patterns may be systematically constructed by closed form formulas or look up table. The base station may receive multiple concurrent transmissions from multiple different UEs, and the sequences of spreading codes and hopping patterns, may be used to identify a particular UE of the multiple UEs.
    Type: Application
    Filed: September 17, 2019
    Publication date: March 19, 2020
    Inventors: Jing Lei, Seyong Park, Gabi Sarkis, Ying Wang, Joseph Binamira Soriaga, Jay Kumar Sundararajan, Tingfang Ji, Naga Bhushan
  • Publication number: 20200092809
    Abstract: Tracking reference signal designs for deployments without continuous reference signal transmission are described. The tracking reference signals may be extended in the frequency domain from a synchronization signal block and may occupy a subset or all of the symbol periods of the synchronization signal block. The tracking reference signals may have the same subcarrier spacing as synchronization signals and may be punctured in the frequency domain. Alternatively, the tracking reference signals may include common control reference signals transmitted periodically with paired reference signals in a data channel. The common control reference signals and paired reference signals may be transmitted regardless of the presence of control or data. For improved tracking after a transition to a connected mode or a long discontinuous reception (DRX) cycle, a slot including tracking reference signals may be repeated or an additional tracking reference signal pattern may be transmitted.
    Type: Application
    Filed: November 15, 2019
    Publication date: March 19, 2020
    Inventors: Heechoon LEE, Yang YANG, Tingfang JI, Alexei Yurievitch GOROKHOV
  • Patent number: 10595328
    Abstract: Aspects of the present disclosure provide for a network assisted grantless data transmission method operable in a wireless communication network. A wireless device may transmit grantless data without requesting a scheduling entity to grant and schedule network resources prior to the grantless data transmission. A scheduling entity determines interference tolerance information of a plurality of uplink channels, wherein the interference tolerance information is configured to individually indicate an availability of each of the plurality of uplink channels for grantless uplink data transmission. The scheduling entity broadcasts the interference tolerance information to one or more subordinate entities or wireless devices.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: March 17, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Wei Zeng, Joseph Binamira Soriaga, Seyong Park, Tingfang Ji
  • Patent number: 10595332
    Abstract: In an embodiment, to avoid a misalignment between NCP and ECP symbols caused by an SCS, at least a portion of a CP of at least one ECP symbol is punctured, and at least one startpoint of at least one ECP slot carrying the at least one punctured ECP symbol is aligned with at least one startpoint of at least one NCP slot carrying at least one NCP symbol. In another embodiment, a symbol control channel is scheduled within an initial control part of a slot before any other symbols are scheduled, and NCP symbols and ECP symbols are scheduled in a remaining data part of the slot that is after the initial control part. In another embodiment, either endpoints or startpoints of NCP and ECP uplink symbols are aligned by extending the ECP uplink symbol or an ECP guard period.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: March 17, 2020
    Assignee: Qualcomm Incorporated
    Inventors: Jing Jiang, Peter Gaal, Tingfang Ji, Wanshi Chen, Joseph Binamira Soriaga
  • Patent number: 10594653
    Abstract: Various aspects of the present disclosure provide for methods, apparatus, and computer software for enabling a single media access control (MAC) layer to control a variety of physical (PHY) layers or entities for multiplexing signals corresponding to each of the PHY layers over an air interface. Here, the MAC layer may include a resource manager configured to determine a time-frequency resource allocation within the air interface for communication with one or more subordinate entities utilizing each of the PHY layers. In this way, The MAC entity may provide dynamic control over the allocation of time-frequency resources within a given resource group, which may include transmission time intervals (TTIs) having multiple time scales.
    Type: Grant
    Filed: April 7, 2017
    Date of Patent: March 17, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Naga Bhushan, John Edward Smee, Joseph Binamira Soriaga, Krishna Kiran Mukkavilli, Tingfang Ji
  • Patent number: 10594521
    Abstract: Apparatuses and methods for performing asynchronous multicarrier communications are provided. One such method involves generating, at a first wireless device, a waveform including one or more carriers, shaping the waveform to reduce interference between the waveform and adjacent waveforms, and transmitting, on a spectrum, the shaped waveform asynchronously.
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: March 17, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Joseph Binamira Soriaga, Tingfang Ji, John Edward Smee, Naga Bhushan, Peter Gaal, Krishna Kiran Mukkavilli, Alexei Yurievitch Gorokhov
  • Patent number: 10595302
    Abstract: An apparatus may utilize an air interface to transmit and/or receive a subframe having a data portion and a control channel that is at least partly embedded within the data portion. The control channel may include one or more pilot tones. The control channel may include an override indicator. The override indicator may indicate that data previously scheduled for transmission in the subframe is overridden by other data having a higher priority. The override indicator may indicate a puncturing of resource elements in the data portion of the subframe to include other data having a priority higher than data previously scheduled for transmission in the subframe. The control channel may include a modulation indicator when the subframe is included in a multi-user multiple-input multiple-output (MU-MIMO) transmission. The modulation indicator may indicate information corresponding to a modulation of another apparatus that is included in the MU-MIMO transmission.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: March 17, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Krishna Kiran Mukkavilli, Jing Jiang, Tingfang Ji, Jamie Menjay Lin, Joseph Binamira Soriaga, John Edward Smee
  • Patent number: 10594532
    Abstract: A configurable new radio (NR) uplink (UL) transmission may use transmit diversity. A user equipment (UE) may identify an uplink transmission of at least one stream as using one of cyclic prefix orthogonal frequency division multiplexing or discrete Fourier transform spread orthogonal frequency division multiplexing. The UE may apply a precoding matrix to the at least one identified stream. The precoding matrix changes over time. The precoding matrix may change based on closed loop feedback, a precoding cycling pattern, and/or a code division multiplexing group. The UE may transmit the at least one identified stream from multiple antennas according to the applied precoding matrix.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: March 17, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Renqiu Wang, Hao Xu, Jing Jiang, Yi Huang, Wei Zeng, Wanshi Chen, Tingfang Ji
  • Patent number: 10594652
    Abstract: Various aspects of the present disclosure provide for methods, apparatus, and computer software for enabling a single media access control (MAC) layer to control a variety of physical (PHY) layers or entities for multiplexing signals corresponding to each of the PHY layers over an air interface. Here, the MAC layer may include a resource manager configured to determine a time-frequency resource allocation within the air interface for communication with one or more subordinate entities utilizing each of the PHY layers. In this way, The MAC entity may provide dynamic control over the allocation of time-frequency resources within a given resource group, which may include transmission time intervals (TTIs) having multiple time scales.
    Type: Grant
    Filed: April 29, 2015
    Date of Patent: March 17, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Naga Bhushan, John Edward Smee, Joseph Binamira Soriaga, Krishna Kiran Mukkavilli, Tingfang Ji
  • Patent number: 10595237
    Abstract: Systems, methods, apparatuses, and computer-program products for performing carrier aggregation across different radio access technologies are disclosed. For example, in some instances a method of wireless communication includes transmitting, using a first wireless communication device, control information to a second wireless communication device via a first radio access technology (RAT), the control information including control information for a second RAT; and receiving, at the first wireless communication device, an acknowledgement (ACK) or negative acknowledgement (NACK) from the second wireless communication device via the first RAT, the ACK or NACK being related to communications of the second wireless communication device conducted via the second RAT.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: March 17, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Tingfang Ji, John Edward Smee, Naga Bhushan
  • Patent number: 10594451
    Abstract: Methods, systems, and devices for wireless communication are described that provide for uplink common burst symbol waveform selection and configuration. A waveform for the uplink common burst symbol may be selected to be a single-carrier frequency division multiplexing (SC-FDM) waveform, an orthogonal frequency division multiplexing (OFDM) waveform, or combinations thereof, based at least in part on information that is to be transmitted. A pattern for SC-FDM sequences may be selected to provide enhanced channel estimation through common pilot tones across different sequences, wideband or narrowband sequences may be selected based at least in part on information to be transmitted, and acknowledgment feedback may be transmitted in an end portion of the uplink common burst symbol in some cases to provide additional processing time for determining the acknowledgment feedback.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: March 17, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Renqiu Wang, Hao Xu, Peter Gaal, Wanshi Chen, Tingfang Ji, Shimman Arvind Patel, John Edward Smee
  • Publication number: 20200084784
    Abstract: Aspects of the present disclosure provide a time division duplex (TDD) subframe structure that supports both single and multiple interlace modes of operation. In a single interlace mode, control information, data information corresponding to the control information and acknowledgement information corresponding to the data information are included in a single subframe. In a multiple interlace mode, at least one of the control information, the data information corresponding to the control information or the acknowledgement information corresponding to the data information is included in a different subframe. Both single and multiple interlace modes can be multiplexed together within the TDD subframe structure.
    Type: Application
    Filed: November 12, 2019
    Publication date: March 12, 2020
    Inventors: Jing JIANG, Peter Pui Lok ANG, Krishna Kiran MUKKAVILLI, Tingfang JI, John Edward SMEE
  • Publication number: 20200083982
    Abstract: A method, an apparatus, and a processor-readable storage medium for wireless communication are provided. A transmitter transmits data packets to a receiver, encodes the data packets to generate parity packets, stores the parity packets in a retransmission buffer, receives information from the receiver indicating that a data packet was not correctly decoded, and transmits to the receiver the parity packets stored in the retransmission buffer for recovering the data packet not correctly decoded without retransmitting the data packet not correctly decoded. The transmitter may further retransmit to the receiver the parity packets. The transmitted data packets may be encoded at a medium access control (MAC) layer of the transmitter. The retransmission buffer may be located at a radio link control (RLC) layer or a packet data convergence protocol (PDCP) layer of the transmitter. A reordering buffer at the receiver may be located at the RLC layer or PDCP layer.
    Type: Application
    Filed: November 15, 2019
    Publication date: March 12, 2020
    Inventors: Jing JIANG, Yu-Ting YU, Feilu LIU, Tingfang JI, Gavin Bernard HORN
  • Publication number: 20200084674
    Abstract: Aspects of the present disclosure provide methods and apparatus for beam selection in uplink-based and downlink-based mobility scenarios, for example, for new radio (NR) systems which can improve handover reliability, reduce handover frequency, and improve power efficiency. Certain aspects provide a method for wireless communications by a user equipment (UE). The method generally includes transmitting an uplink reference signal with an indication of a preferred downlink beam and receiving a downlink transmission based, at least in part, on the uplink reference signal.
    Type: Application
    Filed: November 12, 2019
    Publication date: March 12, 2020
    Inventors: Keiichi KUBOTA, Tingfang JI, Tao LUO, Gavin Bernard HORN, John Edward SMEE, Ravi AGARWAL, Joseph Binamira SORIAGA, Saurabha Rangrao TAVILDAR
  • Publication number: 20200084737
    Abstract: Split synchronization signal configuration for unified synchronization channels and techniques for indicating communication block boundaries in wireless communication systems that use a unified synchronization signal configuration that may be used in different communication modes are described. The disclosed split synchronization signal configuration allows the same synchronization signal configuration to be used in different communication modes (or numerologies) that operate on different frequencies. The boundary indication techniques of embodiments allow efficient indication of the beginning of a communication block (such as a frame, subframe, or slot) relative to the beginning of a unified synchronization signal configuration.
    Type: Application
    Filed: November 11, 2019
    Publication date: March 12, 2020
    Inventors: Heechoon Lee, Hung Ly, Tingfang Ji, Haitong Sun, Wanshi Chen, Peter Gaal, Hao Xu
  • Patent number: 10588162
    Abstract: Uplink waveforms for operating long term evolution (LTE) in an unlicensed band (i.e., long term evolution-unlicensed (LTE-U) communication) are disclosed. Carrier aggregation (CA) and standalone (SA) are disclosed. LTE on the licensed channel may provide both control and data, LTE on the unlicensed channel may provide data. Managing variable transmission time interval (TTI) continuous transmission is disclosed for transmission over multiple subframes of an unlicensed carrier in LTE-U. Listen-before-talk (LBT) requirements of unlicensed carriers provide for additional channel occupancy constraints when scheduling resources for multiple UEs for variable TTI continuous uplink transmissions over multiple subframes. A joint control channel is disclosed that provides control information for all of the potentially available subframes to be scheduled for the uplink transmissions.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: March 10, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Tingfang Ji, Tao Luo, Naga Bhushan, Durga Prasad Malladi, Yongbin Wei, Peter Gaal, Aleksandar Damnjanovic, Wanshi Chen, Srinivas Yerramalli
  • Patent number: 10588171
    Abstract: The present disclosure describes various examples of a method, an apparatus, and a computer readable medium for multi-state discontinuous reception (DRX) in wireless communications. For example, one of the methods described may include identifying, by a user equipment (UE), at least two states in connected mode, determining, by the UE, one or more triggers for transitioning between the at least two states, and transitioning, by the UE, from a first state of the at least two states to a second state of the at least two states in response to a determination of the one or more triggers. In an aspect, the transitioning comprises transitioning between cross-slot scheduling and same-slot scheduling, or between a narrow bandwidth and a wide bandwidth, or between a larger periodicity and a smaller periodicity for monitoring.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: March 10, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Peter Pui Lok Ang, Brian Clarke Banister, Tingfang Ji, Alexei Yurievitch Gorokhov, Wanshi Chen, Jing Sun, Joseph Binamira Soriaga, Jafar Mohseni, Amir Aminzadeh Gohari, John Edward Smee
  • Publication number: 20200068588
    Abstract: Aspects of the present disclosure relate to methods and apparatus for interference management of wireless links with overriding link priority. The switched wireless link or connection may have lower or higher priority than the non-switched or scheduled link. The priority order between the links may be overridden in certain conditions.
    Type: Application
    Filed: November 5, 2019
    Publication date: February 27, 2020
    Inventors: Hua WANG, Junyi LI, Tingfang JI, Naga BHUSHAN
  • Patent number: 10575210
    Abstract: Certain aspects of the present disclosure provide methods and apparatus for managing cyclic redundancy check field lengths in wireless communications. An exemplary method generally includes determining a size of a cyclic redundancy check (CRC) field, from a plurality of possible sizes for a given type of physical wireless channel, to be used for a transmission to be sent on the physical wireless channel, and performing communication based on the transmission on the physical wireless channel with the CRC field of the determined size.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: February 25, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Wanshi Chen, Peter Gaal, Tingfang Ji