Patents by Inventor Yujian Zhang

Yujian Zhang 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).

  • PDCP Packet-Based DDDS Frame Transmission
    Publication number: 20210266779
    Abstract: Systems and methods of providing feedback when a specific PDU is successfully delivered or transmitted are described. The node hosting PDCP entity indicates triggering of a DDDS frame from the remote corresponding node. Rather than immediately triggering transmission of a DDDS frame, the node hosting PDCP entity indicates triggering based on successful delivery of a PDU having a specific SN, as long as in-sequence delivery or transmission of PDUs up to the specific SN was successful. The DDDS frame is transmitted once the corresponding node determines that the PDU having the SN was successfully delivered or transmitted. After reporting by the DDDS frame, the QoS flow associated with the PDUs is remapped from a source DRB to a target DRB.
    Type: Application
    Filed: May 10, 2021
    Publication date: August 26, 2021
    Inventors: Jaemin Han, Yujian Zhang, Sudeep Palat, Alexander Sirotkin
  • Systems, methods and devices for non-adaptive retransmission using semi-persistent scheduling resources
    Patent number: 11096244
    Abstract: Techniques, apparatus and methods are disclosed that enable non-adaptive Hybrid Automatic Repeat Request (HARQ) retransmission using SPS resources. Non-adaptive HARQ retransmission can be enabled in a configured Uplink (UL) resource (such as SPS resources). As it may not be beneficial to allow non-adaptive HARQ retransmission on SPS resources for all kinds of traffic, options for proper configuration can be provided either by network signaling or by predefined configurations.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: August 17, 2021
    Assignee: APPLE INC.
    Inventors: Umesh Phuyal, Yujian Zhang, Youn Hyoung Heo
  • Seamless mobility for 5G and LTE systems and devices
    Patent number: 11057814
    Abstract: User equipment (UE), an enhanced NodeB (eNB) and method of reducing handover latency are generally described. The UE may transmit measurement feedback to the eNB based on control signals. The UE may receive a reconfiguration message from the eNB or another eNB to the UE is attached. The reconfiguration message may contain reconfiguration information indicating whether or not a physical layer or layer 2 of the UE is to be reconfigured and/or a security key is to be updated. The reconfiguration information may be dependent on whether the handover is between eNBs controlled by a same entity and/or whether the handover comprises an intra-frequency transition. The UE or eNB may initiate handover of the UE. During handover the UE may avoid physical layer or layer 2 reconfiguration or the security key update. The security key and data for the UE may be provided directly between the eNBs.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: July 6, 2021
    Assignee: Apple Inc.
    Inventors: Yujian Zhang, Mo-Han Fong, Pingping Zong, Alexei Davydov
  • Methods to determine parameters related to phase tracking reference signals (PT-RS) based on a type of radio network temporary identifier (RNTI)
    Patent number: 11044062
    Abstract: Embodiments of a User Equipment (UE), Next Generation Node-B (gNB) and methods of communication are generally described herein. The UE may receive a physical downlink control channel (PDCCH) that schedules a physical downlink shared channel (PDSCH), wherein a cyclic redundancy check (CRC) of the PDCCH is scrambled by a radio network temporary identifier (RNTI). In some cases, if the RNTI that scrambles the PDCCH is a modulation coding scheme (MCS) cell RNTI (MCS-C-RNTI), cell RNTI (C-RNTI), or a configured scheduling RNTI (CS-RNTI), the UE may determine that: one or more PT-RSs are present in the PDSCH, a time density parameter of the PT-RSs is equal to one, and a frequency density of the PT-RSs is equal to two.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: June 22, 2021
    Assignee: Apple Inc.
    Inventors: Yushu Zhang, Gang Xiong, Yujian Zhang, Guotong Wang
  • Dynamic partition resource allocation in 5G networks
    Patent number: 11025376
    Abstract: Disclosed herein are apparatuses, systems, and methods using or implementing dynamic resource allocation (DRA) of resources for machine-type communication (MTC), as a secondary partition within a system bandwidth. Allocations outside the secondary partition are configured as a primary partition for other than MTC. Apparatuses may perform MTC communications within the secondary partition when DRA configuration information includes allocation information for the secondary partition and the apparatus is configured for MTC. Otherwise, if the apparatus is other than MTC, the apparatus may refrain from performing communications in the secondary partition. Other embodiments are described.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: June 1, 2021
    Assignee: Apple Inc.
    Inventors: Gang Xiong, Pingping Zong, Yujian Zhang, Mo-Han Fong, Jong-Kae Fwu
  • PDCP packet-based DDDS frame transmission
    Patent number: 11006312
    Abstract: Systems and methods of providing feedback when a specific PDU is successfully delivered or transmitted are described. The node hosting PDCP entity indicates triggering of a DDDS frame from the remote corresponding node. Rather than immediately triggering transmission of a DDDS frame, the node hosting PDCP entity indicates triggering based on successful delivery of a PDU having a specific SN, as long as in-sequence delivery or transmission of PDUs up to the specific SN was successful. The DDDS frame is transmitted once the corresponding node determines that the PDU having the SN was successfully delivered or transmitted. After reporting by the DDDS frame, the QoS flow associated with the PDUs is remapped from a source DRB to a target DRB.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: May 11, 2021
    Assignee: Apple Inc.
    Inventors: Jaemin Han, Yujian Zhang, Sudeep K. Palat, Alexander Sirotkin
  • Signaling for resource allocation and scheduling in 5G-NR integrated access and backhaul
    Patent number: 10992358
    Abstract: Embodiments of apparatus and methods for signaling for resource allocation and scheduling in 5G-NR integrated access and backhaul are generally described herein. In some embodiments, User Equipment configured for reporting a channel quality indicator (CQI) index in a channel state information (CSI) reference resource assumes a physical resource block (PRB) bundling size of two PRBs to derive the CQI index.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: April 27, 2021
    Assignee: Apple Inc.
    Inventors: Alexander Sirotkin, Alexei Davydov, Andrey Chervyakov, Anthony Lee, Avik Sengupta, Bharat Shrestha, Candy Yiu, Chang Hong Shan, Dae Won Lee, Dawei Ying, Debdeep Chatterjee, Farid Adrangi, Gang Xiong, Geng Wu, Gregory Morozov, Hassan Ghozlan, Hong He, Honglei Miao, Hua Li, Jaemin Han, Jeongho Jeon, Jie Cui, Jing Zhu, Joey Chou, Joonbeom Kim, Joonyoung Cho, Kathiravetpillai Sivanesan, Lu Lu, May Wu, Naveen Palle, Puneet Jain, Qian Li, Richard C. Burbidge, Robert Zaus, Rui Huang, Satish Chandra Jha, Seau S. Lim, Sergey Panteleev, Song Noh, Yaser M. Fouad, Yi Guo, Yizhi Yao, Yongjun Kwak, Youn Hyoung Heo, Yuhan Zhou, Yujian Zhang, Yushu Zhang
  • QUALITY OF SERVICE FLOW TO DATA RADIO BEARER MAPPING OVERRIDE BIT
    Publication number: 20210112459
    Abstract: Disclosed are apparatuses for quality of service (QoS) flow to data radio bearer (DRB) mapping override bits. An apparatus of a user equipment (UE), includes one or more data storage devices, and one or more processors operably coupled to the one or more data storage devices. The one or more data storage devices are configured to store data corresponding to mapping of QoS flows to data radio bearers. The one or more processors are configured to map one or more QoS flows to a DRB in an uplink (UL) responsive to receipt, by the UE from a cellular base station, of a user plane packet in a downlink (DL) through the DRB if an override bit of the user plane packet indicates that reflective mapping should apply.
    Type: Application
    Filed: December 22, 2020
    Publication date: April 15, 2021
    Inventors: Sudeep Palat, Richard Burbidge, Yujian Zhang, Alexandre Saso Stojanovski, Jerome Parron
  • Supporting semi-persistent scheduling for varied transmission time intervals
    Patent number: 10973078
    Abstract: An apparatus configured to be employed within an evolved Node B (eNodeB) or within a User Equipment (UE) is disclosed. The apparatus includes control circuitry. The control circuitry is configured to configure a semi-persistent scheduling (SPS) configuration that accommodates short subframes. The short subframes have a transmit time interval (TTI) of less than duration of 1 legacy subframe (e.g., 1 ms). The SPS configuration is provided within a radio resource control (RRC) signaling.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: April 6, 2021
    Assignee: Apple Inc.
    Inventors: Umesh Phuyal, Youn Hyoung Heo, Yujian Zhang, Mo-Han Fong
  • RRC coordination between a plurality of nodes
    Patent number: 10966274
    Abstract: Coordination of RRC configurations between an LTE NB and an NR NB in dual connectivity with a UE are performed using an RRC container that includes shared or coordinated parameters. For example, an NR NB determines to alter a configuration of a UE. The NR NB transmits a coordinated RRC container with coordinated UE parameters to an LTE NB and transmits a UE parameter RRC container to the LTE NB. The LTE NB evaluates the coordinated container for compliance with the UE capability. If satisfied, the LTE NB can send both containers (in a single RRC message or multiple RRC messages) to the UE.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: March 30, 2021
    Assignee: APPLE INC.
    Inventors: Sudeep Palat, Yujian Zhang, Richard Burbidge, Ahmed Ibrahim, Youn Hyoung Heo, Ingolf Karls, Yang Yang, Miltiadis Filippou, Michael Faerber
  • POWER HEADROOM REPORTING WITH DUAL CONNECTIVITY
    Publication number: 20210092693
    Abstract: Embodiments described herein relate generally to a communication between a user equipment (“UE”) and a plurality of evolved Node Bs (“eNBs”). A UE may be adapted to operate in a dual connected mode on respective wireless cells provided by first and second eNBs. The UE may be adapted to estimate respective power headroom (“PHR”) values associated with simultaneous operation on the first and second wireless cells. The UE may cause the first and second PHR estimates to be transmitted to both the first and second eNBs. The first and second eNBs may use these estimates to compute respective uplink transmission powers for the UE. Other embodiments may be described and/or claimed.
    Type: Application
    Filed: December 8, 2020
    Publication date: March 25, 2021
    Inventors: KATHIRAVETPILLAI SIVANESAN, ALI T. KOC, SATISH C. JHA, RATH VANNITHAMBY, YUJIAN ZHANG
  • APPARATUS, SYSTEM AND METHOD TO CONFIGURE CONDITIONS FOR RADIO RESOURCE MANAGEMENT MEASUREMENT RELAXATION IN A NEW RADIO NETWORK
    Publication number: 20210076275
    Abstract: An apparatus of New Radio (NR) User Equipment, a system, and a method. The apparatus includes one or more processors to decode a broadcast system information block (SIB) message from a radio access network node (RAN node), the SIB including UE configuration information including an indication of one or more conditions to trigger a relaxation of radio resource management (RRM) measurements by the UE in cell selection or reselection, the one or more conditions including at least one of a mobility state of the UE and a location of the UE in a cell of the gNB; configure the UE based on the configuration information; determine that the one or more conditions are satisfied; and relax RRM measurements by the UE based on determining that the one or more conditions are satisfied.
    Type: Application
    Filed: October 2, 2020
    Publication date: March 11, 2021
    Inventors: Candy Yiu, Qiming Li, Marta Martinez Tarradell, Yujian Zhang, Bharat Shrestha
  • CONCATENATION OF SERVICE DATA UNITS ABOVE A PACKET DATA CONVERGENCE PROTOCOL LAYER
    Publication number: 20210058818
    Abstract: An apparatus of a cellular data communication device includes one or more memory devices configured to store data corresponding to a plurality of service data units (SDUs) from a protocol layer higher than a packet data convergence protocol (PDCP) layer of a cellular data network, and one or more processors operably coupled to the one or more memory devices and configured to concatenate the plurality of SDUs into a single protocol data unit (PDU) above the PDCP layer.
    Type: Application
    Filed: January 18, 2018
    Publication date: February 25, 2021
    Applicant: APPLE INC.
    Inventors: Yujian Zhang, Sudeep Palat, Jing Zhu, Wey-Yi Guy, Youn Hyoung Heo
  • Power headroom reporting with channel selection
    Patent number: 10925010
    Abstract: Systems, apparatus, user equipment (UE), evolved node B (eNB), and methods are described for generating an extended power headroom report (ePHR) based on an uncertainty associated with a physical downlink control channel communication granting an uplink grant for a physical uplink shared channel communication when the system is configured for simultaneous physical uplink shared channel and physical uplink control channel communications. Some embodiments are structured to generate the ePHR using a type 2 report regardless of the uncertainty associated with the ePHR, while other embodiments generate the ePHR using a reference format. In some embodiments, a UE communicates a timing field with a UE capability communication indicating whether the UE meets timing requirements to avoid uncertainty in ePHR communications.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: February 16, 2021
    Assignee: Apple Inc.
    Inventors: Narayan Vishwanathan, Yujian Zhang, Hong He, Seunghee Han, Youn Hyoung Heo
  • Measurement gap repetition patterns for inter-frequency offloading in heterogeneous wireless networks
    Patent number: 10924958
    Abstract: An embodiment for user equipment that receives a plurality of measurement gap repetition patterns from a network. Each measurement gap repetition pattern may be assigned to a different frequency of the network. The plurality of measurement gap repetition patterns may include skipping measurement patterns. Further embodiments may include the user equipment receiving a repetition period in a measurement object frame or receiving a plurality of measurement gap repetition patterns in which the measurement gaps are non-colliding with measurement gaps of other repetition patterns assigned to the user equipment.
    Type: Grant
    Filed: October 8, 2019
    Date of Patent: February 16, 2021
    Assignee: Apple Inc.
    Inventors: Candy Yiu, Yang Tang, Yujian Zhang, Rui Huang
  • Quality of service flow to data radio bearer mapping override bit
    Patent number: 10904800
    Abstract: Disclosed are apparatuses for quality of service (QoS) flow to data radio bearer (DRB) mapping override bits. An apparatus of a user equipment (UE), includes one or more data storage devices, and one or more processors operably coupled to the one or more data storage devices. The one or more data storage devices are configured to store data corresponding to mapping of QoS flows to data radio bearers. The one or more processors are configured to map one or more QoS flows to a DRB in an uplink (UL) responsive to receipt, by the UE from a cellular base station, of a user plane packet in a downlink (DL) through the DRB if an override bit of the user plane packet indicates that reflective mapping should apply.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: January 26, 2021
    Assignee: APPLE INC.
    Inventors: Sudeep Palat, Richard Burbidge, Yujian Zhang, Alexandre Saso Stojanovski, Jerome Parron
  • ACTIVATION OF SECONDARY CELL CONTAINING BANDWIDTH PARTS
    Publication number: 20210014836
    Abstract: 5G methods and architectures to determine active SCells and their bandwidth parts (BWP) used in carrier aggregation (CA) are disclosed in which activating a BWP for an active SCell is performed initially according to a default value provided in initial radio resource control (RRC) messaging. After initialization, SCells and the SCell BWPs used by the user equipment (UE) are activated by RRC messaging, downlink control information (DCI) or dedicated medium access control (MAC) control elements (MAC CEs) with the initial BWP used for an activated SCell being a default value provided during initialization.
    Type: Application
    Filed: March 23, 2020
    Publication date: January 14, 2021
    Inventors: Yujian Zhang, Jeongho Jeon, Youn Hyoung Heo, Candy Yiu, Bharat Shrestha
  • Dual beam operation for mobility
    Patent number: 10879964
    Abstract: Technology for a user equipment (UE) operable to communicate with an one or more extended transmission reception points (TRPs) is disclosed. The UE can signal a transceiver of the UE to simultaneously broadcast two or more transmission beams to establish a connection with one or more of an extended eNodeB or one or more extended transmission reception points (TRP), wherein each extended TRP is connected to the UE via an extended interface with the extended eNodeB. The UE can decode, at the UE, higher layer signaling received from the one or more extended TRPs to form beam association, beam addition, beam release, beam change, or a combination thereof between the UE and the one or more extended TRPs.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: December 29, 2020
    Assignee: APPLE INC.
    Inventors: Candy Yiu, Yuan Zhu, Yujian Zhang, Yushu Zhang, Wenting Chang
  • USER EQUIPMENT AND METHODS OF BEARER OPERATION FOR CARRIER AGGREGATION
    Publication number: 20200396748
    Abstract: Embodiments of a User Equipment (UE) to support dual-connectivity with a Master Evolved Node-B (MeNB) and a Secondary eNB (SeNB) are disclosed herein. The UE may receive downlink traffic packets from the MeNB and from the SeNB as part of a split data radio bearer (DRB). At least a portion of control functionality for the split DRB may be performed at each of the MeNB and the SeNB. The UE may receive an uplink eNB indicator for an uplink eNB to which the UE is to transmit uplink traffic packets as part of the split DRB. Based at least partly on the uplink eNB indicator, the UE may transmit uplink traffic packets to the uplink eNB as part of the split DRB. The uplink eNB may be selected from a group that includes the MeNB and the SeNB.
    Type: Application
    Filed: August 25, 2020
    Publication date: December 17, 2020
    Inventors: Yujian Zhang, Youn Hyoung Heo
  • Method, apparatus and system for managing bearers in a wireless communication system
    Patent number: 10868648
    Abstract: Embodiments of the present disclosure describe methods, apparatuses, and systems for managing bearers in a wireless communication system. In some embodiments, an apparatus, to be employed by a user equipment (UE), may comprise a communication module to: communicate with a core network on a first bearer through a master evolved Node B (MeNB); receive, from the MeNB, a first message of reconfiguring a radio resource control (RRC) connection to establish a second bearer between the UE and the core network and through a secondary eNB (SeNB); synchronize, in response to the message, with the SeNB in order to establish the second bearer; and communicate with the core network on the second bearer through the SeNB, and continue communicating with the core network on the first bearer through the MeNB.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: December 15, 2020
    Assignee: APPLE INC.
    Inventors: Yujian Zhang, Ana Lucia A. Pinheiro, Youn Hyoung Heo, Candy Yiu, Mo-Han Fong