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    Random access mechanisms for link-budget-limited devices
    71.
    发明授权
    Random access mechanisms for link-budget-limited devices 有权

    公开(公告)号：US10278209B2

    公开(公告)日：2019-04-30

    申请号：US15201808

    申请日：2016-07-05

    Applicant: Apple Inc.

    Inventor： Li Su ,  Sami M. Almalfouh ,  Venkateswara Rao Manepalli

    IPC: H04W72/04 ,  H04W74/08 ,  H04W76/27 ,  H04H20/38 ,  H04J11/00 ,  H04L12/26 ,  H04W36/08 ,  H04W88/02 ,  H04W88/08 ,  H04W74/00

    Abstract: Mechanisms enabling link-budget-limited (LBL) devices to more effectively perform random access may include: (1) broadcasting a Physical Random Access Channel (PRACH) configuration index (PCI) reserved for LBL devices; (2) configuring LBL devices to use a PCI that is offset from the conventional PCI of current cell; (3) configuring LBL devices to transmit PRACH messages using an alternative set of subframes, different from conventionally-defined subframe set; (4) configuring LBL devices to transmit PRACH messages on odd frames when the conventional PRACH configuration specifies even frames; (5) configuring LBL devices to generate and use extra PRACH preambles that are not used by non-LBL devices; (6) configuring LBL devices to use group B preambles while non-LBL devices are configured to use group A preambles; and (7) boosting power of a random access response message after an Nth random access failure with preamble conforming to an LBL-reserved pattern of preambles.

    Paging mechanisms for link-budget-limited user devices
    72.
    发明授权
    Paging mechanisms for link-budget-limited user devices 有权

    公开(公告)号：US10264545B2

    公开(公告)日：2019-04-16

    申请号：US15414754

    申请日：2017-01-25

    Applicant: Apple Inc.

    Inventor： Li Su ,  Sami M. Almalfouh ,  Venkateswara Rao Manepalli ,  Srinivas Burugupalli ,  Srinivasan Nimmala ,  Vijay Kumar Ramamurthi ,  Stephan V. Schell

    IPC: H04W68/00 ,  H04W64/00 ,  H04W68/02 ,  H04W72/04 ,  H04W76/28

    Abstract: Various mechanisms for paging link-budget-limited (LBL) devices are disclosed, including: (1) transmitting paging message with non-conventional paging identifier; (2) transmitting paging message(s) with increased power; (3) repeating transmission of paging message to support combining at receiver. Various mechanisms for UE device to signal LBL status are disclosed, including, transmitting status flag or special value of DRX cycle to network node as part of tracking area update and/or attach request. The network node informs a base station of the device's LBL status as part of a paging message. (The network node may, e.g., assign an S-RNTI to the LBL device from a reserved subset of S-RNTI space.) The base station invokes a paging enhancement mechanism when paging an LBL device. Alternatively, the base station may page UE devices without knowledge of LBL status, e.g., by counting paging attempts for a given UE, and boosting power after the Nth paging attempt.

    Off Grid Radio Service System Design
    73.
    发明申请
    Off Grid Radio Service System Design 审中-公开

    公开(公告)号：US20190090293A1

    公开(公告)日：2019-03-21

    申请号：US16110131

    申请日：2018-08-23

    Applicant: Apple Inc.

    Inventor： Li Su

    IPC: H04W76/14 ,  H04W56/00

    Abstract: This disclosure relates to techniques for supporting narrowband device-to-device wireless communication, including possible techniques for performing discovery in an off grid radio system. According to some embodiments, a wireless device may determine a number of synchronization signal repetitions to use for a narrowband device-to-device transmission. The wireless device may perform the transmission, including transmitting the determined number of synchronization signal repetitions. The transmission may include an indication of the number of synchronization signal repetitions used in the transmission.

    Synchronization Sequence Design for Device-to-Device Communication
    74.
    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.

    Techniques for Managing Wireless Transmission Energy Budget
    78.
    发明申请
    Techniques for Managing Wireless Transmission Energy Budget 审中-公开

    公开(公告)号：US20170273025A1

    公开(公告)日：2017-09-21

    申请号：US15076226

    申请日：2016-03-21

    Applicant: Apple Inc.

    Inventor： Li Su

    IPC: H04W52/02

    CPC classification number: H04W52/0258 ,  H04W52/0261 ,  H04W52/0277 ,  Y02D70/00 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/166 ,  Y02D70/168 ,  Y02D70/23 ,  Y02D70/24 ,  Y02D70/26

    Abstract: Techniques are disclosed relating to wireless transmission energy budgets. In some embodiments, an apparatus is configured to determine wireless transmission energy budget for a plurality of time periods. In some embodiments, the apparatus determines budget differently depending on whether it is in a thermal mode or a peak power mode. In some embodiments, the apparatus blanks scheduled wireless transmissions that intersect with the battery signal. In some embodiments, for a time interval subsequent to assertion of the battery signal, the apparatus operates in the peak power mode and determines energy budget for periods based on an amount of energy used for wireless transmissions in a most recent period in which transmissions were blanked in response to the battery signal. In some embodiments, in the thermal mode, the energy budget is based on thermal information for the apparatus, but may also allow carryover of unused budget from previous periods.

    Dual-SIM network selection techniques
    79.
    发明授权
    Dual-SIM network selection techniques 有权

    公开(公告)号：US09661674B2

    公开(公告)日：2017-05-23

    申请号：US14637085

    申请日：2015-03-03

    Applicant: Apple Inc.

    Inventor： Li Su

    IPC: H04W76/02 ,  H04W52/02 ,  H04W8/18

    CPC classification number: H04W76/15 ,  H04W8/183 ,  H04W52/0209 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/24 ,  Y02D70/26

    Abstract: Techniques are disclosed relating to operating multi-SIM mobile devices. In some embodiments, a UE comprises at least first and second SIMs where the first SIM is configured to communications via a home network or one or roaming networks and the second SIM is configurable for communications via local networks other than the home network. In these embodiments, the UE is configured to execute a first protocol stack for communications using the first SIM via a home network or a roaming network. In these embodiments, the UE is further configured to search for available networks for the second SIM using the first protocol stack and select an available local network for the second SIM using the first protocol stack. This may reduce power consumption and/or improve communication quality during the search, in some embodiments.

    Paging Mechanisms for Link-Budget-Limited User Devices
    80.
    发明申请
    Paging Mechanisms for Link-Budget-Limited User Devices 审中-公开

    公开(公告)号：US20170135067A1

    公开(公告)日：2017-05-11

    申请号：US15414754

    申请日：2017-01-25

    Applicant: Apple Inc.

    Inventor： Li Su ,  Sami M. Almalfouh ,  Venkateswara Rao Manepalli ,  Srinivas Burugupalli ,  Srinivasan Nimmala ,  Vijay Kumar Ramamurthi ,  Stephan V. Schell

    IPC: H04W68/02 ,  H04W64/00

    CPC classification number: H04W68/005 ,  H04W64/003 ,  H04W68/02 ,  H04W72/0446 ,  H04W72/048 ,  H04W76/28

    Abstract: Various mechanisms for paging link-budget-limited (LBL) devices are disclosed, including: (1) transmitting paging message with non-conventional paging identifier; (2) transmitting paging message(s) with increased power; (3) repeating transmission of paging message to support combining at receiver. Various mechanisms for UE device to signal LBL status are disclosed, including, transmitting status flag or special value of DRX cycle to network node as part of tracking area update and/or attach request. The network node informs a base station of the device's LBL status as part of a paging message. (The network node may, e.g., assign an S-RNTI to the LBL device from a reserved subset of S-RNTI space.) The base station invokes a paging enhancement mechanism when paging an LBL device. Alternatively, the base station may page UE devices without knowledge of LBL status, e.g., by counting paging attempts for a given UE, and boosting power after the Nth paging attempt.

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