Random Access Mechanisms for Link-Budget-Limited Devices
    75.
    发明申请
    Random Access Mechanisms for Link-Budget-Limited Devices 审中-公开
    链接预算有限设备的随机访问机制

    公开(公告)号:US20170019931A1

    公开(公告)日:2017-01-19

    申请号:US15201808

    申请日:2016-07-05

    Applicant: Apple Inc.

    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.

    Abstract translation: 使链路限制(LBL)设备更有效地执行随机接入的机制可以包括:(1)广播为LBL设备预留的物理随机接入信道(PRACH)配置索引(PCI); (2)将LBL设备配置为使用与当前单元的常规PCI相抵消的PCI; (3)使用不同于传统定义的子帧组的替代的一组子帧来配置LBL设备来发送PRACH消息; (4)当常规PRACH配置指定偶数帧时,配置LBL设备在奇数帧上发送PRACH消息; (5)配置LBL设备以生成和使用未被非LBL设备使用的额外的PRACH前导码; (6)将LBL设备配置为使用B组前导码,而将非LBL设备配置为使用A组前导码; 以及(7)在符合LBL预留的前导码模式的前导码的第N个随机接入故障之后提升随机接入响应消息的功率。

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