Patents by Inventor Longda Xing

Longda Xing 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: 10397119
    Abstract: This disclosure relates to techniques for handling voice and data under uplink limited conditions in a wireless communication system. A wireless device and a base station may establish a wireless communication link. Transmission time interval bundling (TTI-B) may be enabled for uplink communications between the wireless device and the base station. It may be determined that the wireless device is experiencing uplink limited conditions. One or more rules prioritizing a first type of data over a second type of data for uplink communications may be enabled based on TTI-B being enabled and the wireless device experiencing uplink limited conditions.
    Type: Grant
    Filed: October 1, 2018
    Date of Patent: August 27, 2019
    Assignee: Apple Inc.
    Inventors: Sree Ram Kodali, Shivesh Makharia, Longda Xing, Li Su
  • Publication number: 20190254104
    Abstract: This disclosure relates to performing implicit radio resource control state transitions in a cellular communication system. A wireless device may establish a radio resource control (RRC) connection with a cellular base station. A data inactivity timer length and a target RRC state for implicit RRC transitions may be determined. A data inactivity timer having the determined data inactivity timer length may be initiated. It may be determined that the data inactivity timer has expired. The wireless device may transition to the target RRC state based at least in part on determining that the data inactivity timer has expired.
    Type: Application
    Filed: February 1, 2019
    Publication date: August 15, 2019
    Inventors: Sethuraman Gurumoorthy, Srirang A. Lovlekar, Murtaza A. Shikari, Srinivasan Nimmala, Haijing Hu, Fangli Xu, Yuqin Chen, Longda Xing, Xu Ou, Li Su, Vijay Venkataraman, Dawei Zhang, Muthukumaran Dhanapal, Sree Ram Kodali, Srinivas Burugupalli
  • Patent number: 10374960
    Abstract: Described herein are apparatus, systems and methods for enhanced PLMN selection using priority class information. A method may comprise, at a user equipment (“UE”), identifying a plurality of networks, each network having an assigned priority class indicator, identifying a first network of the plurality of networks as having a first priority class indicator, identifying a second network of the plurality of networks as having the first priority class indicator, identifying the first priority class indicator as the highest priority class of the assigned priority class indicators, and selecting between the first network and the second network based a quality characteristic.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: August 6, 2019
    Assignee: APPLE INC.
    Inventors: Qin Zhang, Longda Xing
  • Publication number: 20190150060
    Abstract: A device sets an activity mode for a cellular connection. A method to set the activity mode is performed at a device located with a user that is configured to establish a network connection to a network. The method includes determining a status of the user, the status indicating an activity state or a non-activity state of the user. The method includes, when the status indicates the activity state, activating an activity mode on the device that restricts select types of mobile originating data traffic.
    Type: Application
    Filed: November 14, 2017
    Publication date: May 16, 2019
    Inventors: Srirang A. LOVLEKAR, Vijay VENKATARAMAN, Murtaza A. SHIKARI, Srinivas BURUGUPALLI, Vijay Kumar RAMAMURTHI, Srinivasan NIMMALA, Sethuraman GURUMOORTHY, Muthukumaran DHANAPAL, Longda XING, Ajoy K. SINGH, Jesus A. GUTIERREZ GOMEZ, Saran KRISHNASWAMY
  • Publication number: 20190068508
    Abstract: This disclosure relates to techniques for handling voice and data under uplink limited conditions in a wireless communication system. A wireless device and a base station may establish a wireless communication link. Transmission time interval bundling (TTI-B) may be enabled for uplink communications between the wireless device and the base station. It may be determined that the wireless device is experiencing uplink limited conditions. One or more rules prioritizing a first type of data over a second type of data for uplink communications may be enabled based on TTI-B being enabled and the wireless device experiencing uplink limited conditions.
    Type: Application
    Filed: October 1, 2018
    Publication date: February 28, 2019
    Inventors: Sree Ram Kodali, Shivesh Makharia, Longda Xing, Li Su
  • Patent number: 10187857
    Abstract: A station that performs a method to coordinate transmissions of scheduling requests (SR) with OnDurations of a connected discontinuous reception (C-DRX) cycle. The station receives a packet at a packet arrival time relative to a schedule indicating the SR opportunities and onDurations, the SR opportunities occurring at a first interval, the onDurations occurring at a second interval, the first interval being less than the second interval. The station determines an SR opportunity subsequent to the packet arrival time that precedes an entirety of a subsequent onDuration, such that a transmission duration to transmit the SR and the packet maximally overlaps with the selected onDuration. A sleep mode of the processor of the station is used until a time associated with the selected SR opportunity. An active mode of the processor is used to transmit the SR and receive control channel information during the onDuration.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: January 22, 2019
    Assignee: APPLE INC.
    Inventors: Samy Khay-Ibbat, Navid Damji, Shivesh Makharia, Johnson Sebeni, Sreevalsan Vallath, Longda Xing
  • 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
  • Patent number: 10136306
    Abstract: Generating and using a device-type specific preferred public land mobile network (PLMN) list for roaming PLMN selection. Wireless devices sharing one or more common characteristics may be tasked with collecting roaming PLMN selection data. That data may be collected and used to generate a preferred PLMN list specific to wireless devices sharing those common characteristics. The preferred PLMN list may be distributed to wireless devices sharing those common characteristics, which may then use it in conjunction with roaming PLMN selection.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: November 20, 2018
    Assignee: Apple Inc.
    Inventors: Qin Zhang, Madhusudan Chaudhary, Longda Xing, Umesh K. Shukla, Bo Wang, Zhiwei Wang, Yaoqi Yan, Qiang Miao
  • 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: 10091115
    Abstract: This disclosure relates to techniques for handling voice and data under uplink limited conditions in a wireless communication system. A wireless device and a base station may establish a wireless communication link. Transmission time interval bundling (TTI-B) may be enabled for uplink communications between the wireless device and the base station. It may be determined that the wireless device is experiencing uplink limited conditions. One or more rules prioritizing a first type of data over a second type of data for uplink communications may be enabled based on TTI-B being enabled and the wireless device experiencing uplink limited conditions.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: October 2, 2018
    Assignee: Apple Inc.
    Inventors: Sree Ram Kodali, Shivesh Makharia, Longda Xing, Li Su
  • Patent number: 9973942
    Abstract: Methods and apparatus for modifying network management for hybrid operation. In one embodiment, the networks include an LTE network and a CDMA 1× network, and a mobile device can place CDMA 1× voice calls while registered with the LTE network. However, since the mobile device cannot simultaneously measure information for the LTE network while connected to the CDMA 1× networks, the mobile device modifies measurements and behaviors reported to the LTE network. In one implementation, the mobile device accounts for the time switched away from the LTE network in one or more subsequent reports thereto.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: May 15, 2018
    Assignee: Apple Inc.
    Inventors: Li Su, Jianxiong Shi, Jr., Madhusudan Chaudhary, Longda Xing
  • Patent number: 9974109
    Abstract: A wireless communication system is presented in which user equipment (UE) performs non-intra-frequency (NIF) cell reselection. The NIF cell reselection process can: detect, on a discontinues reception (DRX) cycle, whether a NIF for a second cell has passed a second reselection threshold; perform, on the DRX cycle, additional checks or measurements to determine whether a higher priority NIF for a third cell has passed a third reselection threshold; and continue a cell reselection process for the second cell and the third cell. The NIF cell reselection techniques can help ensure that the UE reselects to higher priority cells without expending an unnecessary amount power.
    Type: Grant
    Filed: February 3, 2014
    Date of Patent: May 15, 2018
    Assignee: Apple Inc.
    Inventors: Shivesh Makharia, Sree Ram Kodali, Longda Xing, Jianxiong Shi
  • Patent number: 9930600
    Abstract: Performing cell re-selection by a device. A first cell on which to camp may be selected. The device may camp on the first cell in an idle-mode. The device may be configured to perform searches for neighboring cells according to an idle-mode timeline while camping on the first cell. The device may transmit a connection request to the first cell in order to transition the device from the idle-mode to a connected-mode via the first cell. One or more searches for neighboring cells may be performed according to a connected-mode timeline after transmitting the connection request, in response to transmitting the connection request. The one or more searches may be performed before the device establishes the connected-mode with the first cell.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: March 27, 2018
    Assignee: Apple Inc.
    Inventors: Shivesh Makharia, Navid Damji, Longda Xing, Johnson O. Sebeni
  • Publication number: 20170344296
    Abstract: A wireless communication device (UE) may include random access memory and associated software configured to selectively place different memory banks into either an active power on mode, retention mode, or power off mode. The selective placement of memory banks into different modes may be performed based on a variety of factors including software module voting information, a current power mode of the memory banks, one or more software program(s) and/or data currently stored on the memory banks, and a counter that counts an amount of time during which a memory bank is not accessed. The placement of memory banks into different modes may be controlled by a memory controller coupled to the memory banks.
    Type: Application
    Filed: March 29, 2017
    Publication date: November 30, 2017
    Inventors: Li Su, Longda Xing
  • Publication number: 20170346746
    Abstract: Described herein are apparatus, systems and methods for enhanced PLMN selection using priority class information. A method may comprise, at a user equipment (“UE”), identifying a plurality of networks, each network having an assigned priority class indicator, identifying a first network of the plurality of networks as having a first priority class indicator, identifying a second network of the plurality of networks as having the first priority class indicator, identifying the first priority class indicator as the highest priority class of the assigned priority class indicators, and selecting between the first network and the second network based a quality characteristic.
    Type: Application
    Filed: May 25, 2017
    Publication date: November 30, 2017
    Inventors: Qin ZHANG, Longda XING
  • Patent number: 9781737
    Abstract: Methods and apparatus for minimizing scheduling collisions between networks. In one embodiment, the networks are substantially unsynchronized, and during hybrid network operation (e.g., LTE and CDMA 1X operation), a mobile device can place CDMA 1X voice calls while registered with the LTE network. However, since the LTE and CDMA 1X networks are not coordinated, the mobile device will experience scheduling collisions. In one variant, the LTE network accounts for predictable behaviors (such as CDMA 1X paging), and schedules low priority tasks during likely time interval conflicts. Consequently, even though the mobile device must tune away from the LTE network to check CDMA 1X pages, overall LTE network performance is minimally affected.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: October 3, 2017
    Assignee: Apple Inc.
    Inventors: Li Su, Madhusudan Chaudhary, Jianxiong Shi, Longda Xing
  • Publication number: 20170279727
    Abstract: This disclosure relates to techniques for handling voice and data under uplink limited conditions in a wireless communication system. A wireless device and a base station may establish a wireless communication link. Transmission time interval bundling (TTI-B) may be enabled for uplink communications between the wireless device and the base station. It may be determined that the wireless device is experiencing uplink limited conditions. One or more rules prioritizing a first type of data over a second type of data for uplink communications may be enabled based on TTI-B being enabled and the wireless device experiencing uplink limited conditions.
    Type: Application
    Filed: March 23, 2016
    Publication date: September 28, 2017
    Inventors: Sree Ram Kodali, Shivesh Makharia, Longda Xing, Li Su
  • Publication number: 20170238167
    Abstract: Generating and using a device-type specific preferred public land mobile network (PLMN) list for roaming PLMN selection. Wireless devices sharing one or more common characteristics may be tasked with collecting roaming PLMN selection data. That data may be collected and used to generate a preferred PLMN list specific to wireless devices sharing those common characteristics. The preferred PLMN list may be distributed to wireless devices sharing those common characteristics, which may then use it in conjunction with roaming PLMN selection.
    Type: Application
    Filed: May 3, 2017
    Publication date: August 17, 2017
    Inventors: Qin Zhang, Madhusudan Chaudhary, Longda Xing, Umesh K. Shukla, Bo Wang, Zhiwei Wang, Yaoqi Yan, Qiang Miao
  • Patent number: 9681450
    Abstract: A method for radio link control in a mobile wireless communication device. The mobile wireless device transmits a sequence of service requests to establish radio resources with a wireless communication network for a data packet in a pending data buffer. When no radio resources are allocated in response to the transmitted sequence of service requests, the mobile wireless device sets a minimum threshold for the pending data buffer, discards all pending data packets above the minimum threshold and discards the oldest pending data packet. The mobile wireless device repeats transmitting and discarding until a radio resource is allocated or the pending data packet buffer is empty. A retry interval between successive service requests is increased after transmitting each sequence of service requests until reaching a maximum retry interval value.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: June 13, 2017
    Assignee: Apple Inc.
    Inventors: Sundararaman Shiva, Longda Xing, Jianxiong Shi
  • Patent number: 9668203
    Abstract: Generating and using a device-type specific preferred public land mobile network (PLMN) list for roaming PLMN selection. Wireless devices sharing one or more common characteristics may be tasked with collecting roaming PLMN selection data. That data may be collected and used to generate a preferred PLMN list specific to wireless devices sharing those common characteristics. The preferred PLMN list may be distributed to wireless devices sharing those common characteristics, which may then use it in conjunction with roaming PLMN selection.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: May 30, 2017
    Assignee: Apple Inc.
    Inventors: Qin Zhang, Madhusudan Chaudhary, Longda Xing, Umesh K Shukla, Bo Wang, Zhiwei Wang, Yaoqi Yan, Qiang Miao