Patents by Inventor Zhu Ji

Zhu 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: 10178615
    Abstract: A method and device for scheduling SR transmissions for a user equipment (UE) associated with an evolved Node B (eNB) of a Long Term Evolution (LTE) network. The method includes determining an SR is to be transmitted to the LTE network, determining an uplink grant behavior of the eNB, when the uplink grant behavior of the eNB indicates that previous uplink grants satisfy a threshold of previous grants occurring in onDurations of the cycle of a C-DRX functionality, selecting one of the at least one SR opportunity that follows a next onDuration relative to when the indication is received and scheduling the SR in the one of the at least one SR opportunity that follows the next onDuration. The method further including determining an uplink grant turnaround time associated with the eNB, and selecting one of the at least one SR opportunity based on the uplink grant turnaround time.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: January 8, 2019
    Assignee: APPLE INC.
    Inventors: Beibei Wang, Zhu Ji, Johnson O. Sebeni
  • Patent number: 10177860
    Abstract: Method and apparatus for co-existence management between mitigation techniques where a user device (“UE”) is connected to a base station (“BS”) of a network. The UE may receive a first value of a BS parameter from the BS and may determine a second value of a signal quality parameter corresponding to a signal received by the UE from the BS. The UE may then select an operating mode for the UE based on the first value and the second value, where the operating mode comprises implementing at least one interference mitigation technique.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: January 8, 2019
    Assignee: APPLE INC.
    Inventors: Jia Tang, Zhu Ji
  • Publication number: 20180368112
    Abstract: A downlink control information (DCI), such as a blanking DCI (bDCI) message may be transmitted by a base station (e.g., eNB) and received by a mobile device (e.g., UE). The bDCI may indicate that the eNB will not transmit a subsequent DCI to the UE for a duration of time. The UE may be in continuous reception mode or connected discontinuous reception (C-DRX) mode. The UE may therefore determine to enter a sleep state or take other action. The bDCI may specify an explicit blanking duration, or an index indicating a blanking duration from a lookup table, and/or the blanking duration (and/or a blanking duration offset value) may be determined in advance, e.g., semi-statically. When the UE is in C-DRX mode, the UE may be configured such that either the sleep/wake period of the C-DRX mode or the blanking period of the bDCI may take precedence over the other.
    Type: Application
    Filed: March 16, 2018
    Publication date: December 20, 2018
    Inventors: Johnson O. Sebeni, Yang Li, Zhu Ji, Yuchul Kim, Wei Zeng, Dawei Zhang, Haijing Hu, Xiangying Yang, Li Su
  • Publication number: 20180368199
    Abstract: Apparatuses, systems, and methods for a wireless device to perform substantially concurrent communications with a next generation network node and a legacy network node. The wireless device may be configured to stablish a first wireless link with a first cell according to a RAT, where the first cell operates in a first system bandwidth and establish a second wireless link with a second cell according to a RAT, where the second cell operates in a second system bandwidth. Further, the wireless device may be configured to perform uplink activity for both the first RAT and the second RAT by TDM uplink data for the first RAT and uplink data for the second RAT if uplink activity is scheduled according to both the first RAT and the second RAT.
    Type: Application
    Filed: April 30, 2018
    Publication date: December 20, 2018
    Inventors: Wei Zeng, Haijing Hu, Yuchul Kim, Dawei Zhang, Xiangying Yang, Zhu Ji, Yang Li, Beibei Wang, Jia Tang, Sami M. Almalfouh, Johnson O. Sebeni, Wei Zhang, Tianyan Pu, Vijay Venkataraman, Christian W. Mucke
  • Publication number: 20180368153
    Abstract: Apparatuses, systems, and methods for a wireless device to perform simultaneous uplink activity for multiple RATs in the same carrier using frequency division multiplexing. The wireless device may establish a first wireless link with a first base station according to a first radio access technology (RAT) and a second wireless link with a second base station according to a second RAT. The first base station may provide a first cell operating in a first system bandwidth and the second base station may provide a second cell operating in a second system bandwidth. The wireless device may determine whether the wireless device has uplink activity scheduled according to both the first RAT and the second RAT. If so, the wireless device may perform uplink activity for both the first RAT and the second RAT in the first system bandwidth using frequency division multiplexing.
    Type: Application
    Filed: May 2, 2018
    Publication date: December 20, 2018
    Inventors: Yang Li, Wei Zeng, Zhu Ji, Beibei Wang, Jia Tang, Yuchul Kim, Haijing Hu, Dawei Zhang, Xiangying Yang, Sami M. Almalfouh, Johnson O. Sebeni, Wei Zhang, Tianyan Pu
  • Publication number: 20180367230
    Abstract: Apparatuses, systems, and methods for a wireless device to perform simultaneous uplink activity for multiple RATs in the same carrier using multiplexing at a layer above the physical layer. The wireless device may establish wireless links with first and second base stations, respectively, according to first and second radio access technologies (RATs), respectively. The first base station may provide a first cell operating in a first system bandwidth and the second base station may provide a second cell operating in a second system bandwidth. The wireless device may determine whether inter-RAT uplink coexistence in the same frequency band is enabled. If so, the wireless device may perform uplink activity for both the first RAT and the second RAT in the first system bandwidth by multiplexing uplink data for the first RAT and uplink data for the second RAT at a layer above the physical layer.
    Type: Application
    Filed: June 15, 2018
    Publication date: December 20, 2018
    Inventors: Li Su, Haijing Hu, Dawei Zhang, Wei Zeng, Yuchul Kim, Xiangying Yang, Beibei Wang, Zhu Ji, Yang Li, Jia Tang, Sami M. Almalfouh, Johnson O. Sebeni, Wei Zhang, Tianyan Pu
  • Publication number: 20180359760
    Abstract: This disclosure relates to techniques for wireless devices to improve wireless communication technology coexistence characteristics using narrow band use awareness in a wireless communication system. A wireless device may attach to a serving cell according to a first radio access technology. A frequency range in active use by the wireless device for communication according to the first radio access technology may be determined. The frequency range may include less bandwidth than the system bandwidth of the serving cell. An indication of the frequency range may be provided from a portion of the wireless device implementing the first radio access technology to a portion of the wireless device implementing a second radio access technology. It may be determined whether to modify operation of the wireless device with respect to the second radio access technology based at least in part on the indication of the frequency range.
    Type: Application
    Filed: March 30, 2018
    Publication date: December 13, 2018
    Inventors: Li Su, Yang Li, Zhu Ji
  • Publication number: 20180351661
    Abstract: A user of a device desires that geographic position information of the device be kept private. A network may track a geographic position of a device using timing advance (TA) data and also a passive attacker may attempt to track the geographic position of the device by observing base station TA commands. In embodiments provided herein, a device diminishes or obfuscates geographic position information by using a timing change value while not disturbing synchronization of uplink signals from multiple devices arriving at a base station. To resist an averaging solution by an observer, the device in some embodiments adjusts the timing change value based on an internal timer. In an emergency call situation, the method permits the base station to obtain geographic position information based on TA procedures.
    Type: Application
    Filed: September 25, 2017
    Publication date: December 6, 2018
    Inventors: Elliot S. BRIGGS, Zhu JI, Johnson O. SEBENI
  • Publication number: 20180351659
    Abstract: Methods, systems and apparatus for a user equipment to mitigate interference in a wireless charging state. The user equipment may determine when the user equipment enters a wireless charging state and, when the user equipment enters the wireless charging state, activate an interference mitigation. The user equipment may further determine when the UE exits the wireless charging state and, when the user equipment exits the wireless charging state, deactivate the interference mitigation.
    Type: Application
    Filed: June 2, 2017
    Publication date: December 6, 2018
    Inventors: Srinivasan Nimmala, Sethuraman Gurumoorthy, Vijay Venkataraman, Vijay Kumar Ramamurthi, Srirang A. Lovlekar, Lakshmi N. Kavuri, Sang Ho Baek, Yifan Zhu, Karthik Anantharaman, Rangakrishna Nallandigal, Sree Ram Kodali, Adesh Kumar, Xin Wang, Eyad Al-Shemali, Xiangpeng Jing, Sivaramachandran Ganesan, Longda Xing, Jianxiong Shi, Sami M. Almalfouh, Zhu Ji, Johnson O. Sebeni, Beibei Wang, Sunny Arora
  • Publication number: 20180351658
    Abstract: Method and apparatus for co-existence management between mitigation techniques where a user device (“UE”) is connected to a base station (“BS”) of a network. The UE may receive a first value of a BS parameter from the BS and may determine a second value of a signal quality parameter corresponding to a signal received by the UE from the BS. The UE may then select an operating mode for the UE based on the first value and the second value, where the operating mode comprises implementing at least one interference mitigation technique.
    Type: Application
    Filed: June 2, 2017
    Publication date: December 6, 2018
    Inventors: Jia TANG, Zhu JI
  • Publication number: 20180351975
    Abstract: A device observes base station signals and identifies those that are suspicious and those that are normal. The device avoids communication with the sources of suspicious signals. A rogue base station may be the source of suspicious signals. A system operated by a mobile network operator is a source of normal signals. A rogue operator and the mobile network operator have different goals and those differences are the basis of embodiments provided herein to detect the rogue base station. The observations are characterized by message rates, waveform accuracy, cell parameters, and synchronization level.
    Type: Application
    Filed: May 31, 2017
    Publication date: December 6, 2018
    Inventors: Elliot S. BRIGGS, Zhu JI
  • Patent number: 10129283
    Abstract: A device observes base station signals and identifies those that are suspicious and those that are normal. The device avoids communication with the sources of suspicious signals. A rogue base station may be the source of suspicious signals. A system operated by a mobile network operator is a source of normal signals. A rogue operator and the mobile network operator have different goals and those differences are the basis of embodiments provided herein to detect the rogue base station. The observations are characterized by message rates, waveform accuracy, cell parameters, and synchronization level.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: November 13, 2018
    Assignee: Apple Inc.
    Inventors: Elliot S. Briggs, Zhu Ji
  • Patent number: 10110294
    Abstract: A method for adaptively disabling receiver diversity is provided. The method can include a wireless communication device determining an active data traffic pattern; defining a threshold channel quality metric based at least in part on a threshold channel quality needed to support a threshold quality of service for the active data traffic pattern; comparing a measured channel quality to the threshold channel quality metric; and disabling receiver diversity in an instance in which the measured channel quality metric satisfies the threshold channel quality metric.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: October 23, 2018
    Assignee: Apple Inc.
    Inventors: Srinivasan Nimmala, Navid Damji, Tarik Tabet, Li Su, Longda Xing, Zhu Ji
  • Patent number: 10097337
    Abstract: A method and device are described that may be implemented by a user equipment (UE) that established a first connection to a first network component, the user equipment configured to establish a second connection with a second network component, the user equipment configured for a carrier aggregation functionality, the first network component serving as a primary serving cell (PCell) and the second network component serving as a secondary serving cell (SCell). The method may include determining a cycle comprising a first time when a SCell measurement is performed and a remainder second time, when the cumulative first and second times is less than a threshold cycle time, determining an interruption opportunity based on activity between the UE and the PCell and when the interruption opportunity is determined, deactivating a radio frequency (RF) chain associated with the SCell during the second time.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: October 9, 2018
    Assignee: APPLE INC.
    Inventors: Zhu Ji, Beibei Wang, Johnson O. Sebeni
  • Publication number: 20180287751
    Abstract: A method, device and integrated circuit for receiving signals in a narrow bandwidth range from a base station of a network, the narrow bandwidth range being a portion of an overall bandwidth range of the network and the signals comprising one or more of cell-specific reference signal (CRS) tones, determining whether a condition exists based on the one or more CRS tones, when the condition exists, extending the narrow bandwidth range to an extended narrow bandwidth range, the extended narrow bandwidth range including at least one further CRS tone than the narrow bandwidth range and monitoring the extended narrow bandwidth range to receive further signals comprising the at least one further CRS tone.
    Type: Application
    Filed: March 30, 2018
    Publication date: October 4, 2018
    Inventors: Junsung LIM, Li Su, Johnson O. Sebeni, Yang Li, Young Jae Kim, Zhu Ji
  • Patent number: 9998934
    Abstract: A method to be performed by a wireless station having a wireless transceiver configured to establish a connection to a network, a processor and a non-transitory computer readable storage medium. The method includes receiving information during a first reception segment of a discontinuous reception cycle, wherein the discontinuous reception cycle includes the first reception segment and a first idle segment, performing a first measurement that begins during the first reception segment and performing a second measurement, wherein the second measurement begins prior to an end of the first measurement.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: June 12, 2018
    Assignee: APPLE INC.
    Inventors: Wanping Zhang, Zhu Ji, Qiang Miao, Johnson O. Sebeni, Joshua Zhang
  • Patent number: 9980225
    Abstract: Methods and apparatus for adaptively adjusting temporal parameters (e.g., neighbor cell search durations). In one embodiment, neighbor cell search durations during discontinuous reception are based on a physical channel metric indicating signal strength and quality (e.g. Reference Signal Received Power (RSRP), Received Signal Strength Indication (RSSI), Reference Signal Receive Quality (RSRQ), etc.) of a cell. In a second embodiment, neighbor cell search durations are based on a multitude of physical layer metrics from one or more cells. In one variant, the multitude of physical layer metrics may include signal strength and quality metrics from the serving base station as well as signal strength and quality indicators from neighbor cells derived from the cells respective synchronization sequences.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: May 22, 2018
    Assignee: Apple Inc.
    Inventors: Navid Damji, Zhu Ji, Johnson Sebeni, Jason Shi, Li Su
  • Publication number: 20180139028
    Abstract: A method performed by a user equipment that includes receiving a redundancy version (RV) of control information during a transmission time interval (TTI) from a network to which the user equipment has established a connection, wherein the control information comprises a plurality of RVs, determining a first value corresponding to the TTI, determining a second value based on a connectivity parameter measurement of the connection and determining whether to perform a decode operation on the RV based on a comparison of the first value and the second value.
    Type: Application
    Filed: November 14, 2017
    Publication date: May 17, 2018
    Inventors: Junsung LIM, Zhu JI, Jia TANG, Johnson O. SEBENI
  • Patent number: 9967112
    Abstract: Methods and apparatus for resuming radio channel measurements and estimations after an interruption in reception. In one exemplary embodiment of the present disclosure, an adaptive solution is provided for channel estimation based at least in part on the reception interruption duration. In one variant, an LTE UE determines a windowing length and/or “shape” for a time domain channel estimation algorithm based on at least the interruption duration. In an alternate variant, an LTE UE determines the interpolation coefficients for a filter based on the interruption duration.
    Type: Grant
    Filed: May 3, 2013
    Date of Patent: May 8, 2018
    Assignee: APPLE INC.
    Inventors: Tarik Tabet, Navid Damji, Kee-Bong Song, Syed Aon Mujtaba, Johnson Sebeni, Zhu Ji
  • Publication number: 20170359779
    Abstract: A method and device for scheduling SR transmissions for a user equipment (UE) associated with an evolved Node B (eNB) of a Long Term Evolution (LTE) network. The method includes determining an SR is to be transmitted to the LTE network, determining an uplink grant behavior of the eNB, when the uplink grant behavior of the eNB indicates that previous uplink grants satisfy a threshold of previous grants occurring in onDurations of the cycle of a C-DRX functionality, selecting one of the at least one SR opportunity that follows a next onDuration relative to when the indication is received and scheduling the SR in the one of the at least one SR opportunity that follows the next onDuration. The method further including determining an uplink grant turnaround time associated with the eNB, and selecting one of the at least one SR opportunity based on the uplink grant turnaround time.
    Type: Application
    Filed: June 10, 2016
    Publication date: December 14, 2017
    Inventors: Beibei WANG, Zhu JI, Johnson O. SEBENI