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    Self-Contained Slot and Slot Duration Configuration in NR Systems
    151.
    发明申请
    Self-Contained Slot and Slot Duration Configuration in NR Systems 审中-公开

    公开(公告)号：US20190306856A1

    公开(公告)日：2019-10-03

    申请号：US16357844

    申请日：2019-03-19

    Applicant: Apple Inc.

    Inventor： Zhu Ji ,  Yang Li ,  Yuchul Kim ,  Johnson O. Sebeni ,  Sami M. Almalfouh ,  Wei Zeng ,  Dawei Zhang

    IPC: H04W72/04 ,  H04W76/10

    Abstract: Apparatuses, systems, and methods to dynamically indicate preference for self-contained slots and slot duration by a user equipment device (UE) in communication with a base station (e.g., a gNB) using a 5G NR radio access technology. A UE may determine to send an indication to a gNB indicating a preference for self-contained slots and slot duration for downlink and/or uplink communications utilizing one or more of the physical downlink control channel (PDCCH), the physical downlink shared channel (PDSCH), and/or acknowledgement messaging (ACK/NACK) for downlink communications, and utilizing one or more of the physical uplink control channel (PUCCH), the PDCCH, and/or the physical uplink shared channel (PUSCH) for uplink communications. The configuration of self-contained slots and slot duration for uplink and/or downlink may be based on one or more of average packet size, average packet rate, traffic type and UE processing capabilities.

    Adaptive uplink link adaptation
    153.
    发明授权
    Adaptive uplink link adaptation 有权

    公开(公告)号：US10305627B2

    公开(公告)日：2019-05-28

    申请号：US14503217

    申请日：2014-09-30

    Applicant: Apple Inc.

    Inventor： Si Li ,  Zhu Ji ,  Srinivasan Vasudevan

    IPC: H04L1/00

    Abstract: A wireless communication system is presented for adaptive uplink (UL) link adaptation (LA). The adaptive UL LA can include multiple outer loops, for which multiple block error rate (BLER) filtering is performed. Each of the multiple BLER filtering can be performed on groups or sub-groups of subframes, in which each group has the same or similar coding characteristics. For example, one group in TD-LTE could be subframes with sounding reference signal (SRS) and another group could be subframes without SRS. Each of the multiple BLER filtering can use the same or different BLER algorithm, BLER target and/or BLER parameters.

    Synchronization Sequence Design for Device-to-Device Communication
    154.
    发明申请
    Synchronization Sequence Design for Device-to-Device Communication 审中-公开

    公开(公告)号：US20190089570A1

    公开(公告)日：2019-03-21

    申请号：US16110377

    申请日：2018-08-23

    Applicant: Apple Inc.

    Inventor： Yang Li ,  Tianyan Pu ,  Li Su ,  Zhu Ji

    IPC: H04L27/26 ,  H04W56/00

    CPC classification number: H04L27/2692 ,  H04L27/2613 ,  H04W56/001 ,  H04W56/002

    Abstract: This disclosure relates to techniques for supporting narrowband device-to-device wireless communication, including possible techniques for providing synchronization sequences. A first wireless device may transmit a preamble of a device-to-device wireless communication with a second wireless device. The preamble may include a first synchronization sequence. The first synchronization sequence may include multiple repetitions of a basis sequence, multiplied by a cover code. The basis sequence may span multiple orthogonal frequency division multiplexing symbols.

    Accessibility in dynamic cellular networks
    155.
    发明授权
    Accessibility in dynamic cellular networks 有权

    公开(公告)号：US10187802B2

    公开(公告)日：2019-01-22

    申请号：US13854810

    申请日：2013-04-01

    Applicant: Apple Inc.

    Inventor： Zhu Ji ,  Johnson O. Sebeni

    IPC: H04W36/00 ,  H04W48/18 ,  H04W16/14 ,  H04W48/16 ,  H04W24/00

    Abstract: In order to facilitate communication in a dynamic cellular network, an accessibility issue in the dynamic cellular network may be detected. For example, if an electronic device is near the boundary between two adjacent cells in the dynamic cellular-telephone network, the signal power of signals from the adjacent cell may be higher than that of signals from the current servicing cell, which may offer an opportunity to improve communication performance. Thus, the accessibility issue may be detected if the difference is larger than a threshold value (such as 2-4 dB). In response to detecting the accessibility issue, a remedial action may be performed, such as repeating at least a portion of an acquisition process. In this way, the communication technique may improve the communication performance of the electronic device in the dynamic cellular network, thereby improving the user experience and customer satisfaction.

    Device and method for adaptive channel estimation
    157.
    发明授权
    Device and method for adaptive channel estimation 有权

    公开(公告)号：US09660838B2

    公开(公告)日：2017-05-23

    申请号：US14290433

    申请日：2014-05-29

    Applicant: APPLE INC.

    Inventor： Zhu Ji ,  Johnson O. Sebeni ,  Navid Damji

    IPC: H04W4/00 ,  H04L25/02 ,  H04W4/06 ,  H04L27/26 ,  H04L12/18 ,  H04L5/00

    CPC classification number: H04L25/0224 ,  H04L5/0048 ,  H04L12/189 ,  H04L25/0212 ,  H04L25/0222 ,  H04L25/0232 ,  H04L27/2601 ,  H04W4/06

    Abstract: A method to be performed at a station configured to connect to a Long Term Evolution radio access network (LTE-RAN) to utilize enhanced Multimedia Broadcast Multicast Services using a Multicast-Broadcast Single-Frequency Network (MBSFN). The method including receiving a MBSFN subframe having a MBSFN subframe structure including a plurality of Orthogonal Frequency-Division Multiplexing (OFDM) symbols, a first one of the OFDM symbols having a first reference symbol inserted therein, a second one of the OFDM symbols having a second reference symbol inserted therein, determining a rate of change of channel conditions being experienced by the station and performing a non-destaggered channel estimation when the rate of change of channel conditions is greater than a predetermined threshold, the non-destaggered channel estimation using a first Channel Impulse Response (CIR) at the first OFDM symbol and a second CIR at the second OFDM symbol.

    Adaptive neighboring cell measurement scaling for wireless devices
    158.
    发明授权
    Adaptive neighboring cell measurement scaling for wireless devices 有权
    无线设备的自适应相邻小区测量缩放

    公开(公告)号：US09596633B2

    公开(公告)日：2017-03-14

    申请号：US14135671

    申请日：2013-12-20

    Applicant: Apple Inc.

    Inventor： Zhu Ji ,  Johnson O. Sebeni ,  Xiantao Sun ,  Yu-Lin Wang

    IPC: H04W36/00 ,  H04W76/04 ,  H04W68/02

    CPC classification number: H04W36/0088 ,  H04W68/02 ,  H04W76/28

    Abstract: Adaptive neighboring cell measurement scaling by a wireless user equipment (UE) device. The UE may operate alternately in active and inactive states in a periodic manner according to DRX cycle timing for each of a plurality of DRX cycles. Paging messages may be checked for while in the active state during each DRX cycle. If a paging message is received, it may be decoded using a joint detection technique. The UE may adaptively determine whether or not to perform neighboring cell measurements during at least a subset of the DRX cycles, and perform neighboring cell measurements according to the adaptive determination. The adaptive determination may be based on one or more of joint detection of paging messages, one or more previous cell measurements, or an amount of motion of the UE.

    Abstract translation: 由无线用户设备（UE）设备进行的适应性相邻小区测量缩放。 UE可以根据针对多个DRX周期中的每一个的DRX周期定时以周期方式交替地在活动状态和非活动状态中进行操作。 可以在每个DRX周期期间在处于活动状态期间检查寻呼消息。 如果接收到寻呼消息，则可以使用联合检测技术对其进行解码。 UE可以自适应地确定在DRX周期的至少一个子集期间是否执行相邻小区测量，并且根据自适应确定执行相邻小区测量。 自适应确定可以基于寻呼消息的联合检测，一个或多个先前小区测量或UE的运动量中的一个或多个。

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