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    AUTONOMOUS UPLINK TRANSMISSION IN UNLICENSED SPECTRUM
    436.
    发明申请
    AUTONOMOUS UPLINK TRANSMISSION IN UNLICENSED SPECTRUM 审中-公开

    公开(公告)号：US20170230838A1

    公开(公告)日：2017-08-10

    申请号：US15416923

    申请日：2017-01-26

    Applicant: QUALCOMM Incorporated

    Inventor： Srinivas Yerramalli ,  Tao Luo ,  Peter Gaal ,  Aleksandar Damnjanovic

    IPC: H04W16/14 ,  H04L1/18 ,  H04L5/00 ,  H04W74/08 ,  H04W72/04

    Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) operating in unlicensed spectrum may determine that a base station is not transmitting during a particular time period (e.g., by detecting the absence of a control signal). The UE may then perform a listen-before-talk (LBT) procedure and, if the channel is available, may perform an autonomous uplink (UL) transmission. The autonomous UL transmission may include control information to facilitate decoding. Thus, the base station may receive the control information, and decode the rest of the autonomous UL transmission accordingly. The base station may configure the UE for autonomous UL transmissions when the radio link is established, and may also send dynamic configuration information to initiate, suspend, or reconfigure parameters for autonomous UL transmissions.

    LTE channel access over unlicensed bands
    437.
    发明授权
    LTE channel access over unlicensed bands 有权

    公开(公告)号：US09674825B2

    公开(公告)日：2017-06-06

    申请号：US14317090

    申请日：2014-06-27

    Applicant: QUALCOMM Incorporated

    Inventor： Srinivas Yerramalli ,  Tao Luo ,  Naga Bhushan ,  Peter Gaal

    IPC: H04W72/04 ,  H04W74/00 ,  H04W74/08

    CPC classification number: H04W72/042 ,  H04W74/002 ,  H04W74/08

    Abstract: Methods, systems, and devices are described for wireless communications. In one method, a clear channel assessment (CCA) may be performed at a base station to determine availability of an unlicensed spectrum. A first waveform may be transmitted to a set of user equipments (UEs) over the unlicensed spectrum when available. The first waveform may indicate a first time period and a second time period during which the base station has channel access over the unlicensed spectrum. A second waveform may be received from one or more UEs responsive to the first waveform. Each second waveform may be received over the unlicensed spectrum during the first time period and may indicate that the respective UE has channel access over the unlicensed spectrum to receive data from the base station during the second time period.

    MITIGATION OF INTER-BASE STATION RESYNCHRONIZATION LOSS IN LTE/LTE-A NETWORKS WITH CONTENTION-BASED SHARED FREQUENCY SPECTRUM
    438.
    发明申请
    MITIGATION OF INTER-BASE STATION RESYNCHRONIZATION LOSS IN LTE/LTE-A NETWORKS WITH CONTENTION-BASED SHARED FREQUENCY SPECTRUM 有权
    LTE / LTE-A网络内部基于共享频谱分析的基站驻留修正失效

    公开(公告)号：US20160262188A1

    公开(公告)日：2016-09-08

    申请号：US15041635

    申请日：2016-02-11

    Applicant: QUALCOMM Incorporated

    Inventor： Xiaoxia Zhang ,  Vikas Jain ,  Srinivas Yerramalli ,  Tao Luo ,  Aleksandar Damnjanovic ,  Kiran Kumar Somasundaram

    IPC: H04W74/08 ,  H04J11/00 ,  H04W74/00

    CPC classification number: H04J11/0056 ,  H04W16/14 ,  H04W72/1268 ,  H04W74/0808

    Abstract: Mitigation of inter-base station resynchronization loss in wireless networks including contention-based shared frequency spectrum is discussed. Aspects of such mitigation provide for base stations entering into an idle mode when a transmission opportunity occurs in a radio frame of the next resynchronization occasion. Additional aspects provide for the base station to signal a flexible listen before talk (LBT) frame length to the user equipment (UE), either with or without explicit signaling of the downlink-uplink division. Further aspects provide for the base station to signal a reset indication to UEs that will prompt the UEs to monitor for downlink channel reserving signals prior to the current LBT frame ending by the resynchronization occasion.

    Abstract translation: 讨论了基于竞争的共享频谱在无线网络中基站间重新同步丢失的缓解。 当在下一个再同步场合的无线电帧中发生传输机会时，这种缓解的方面提供了进入空闲模式的基站。 另外的方面提供了基站用于向用户设备（UE）发送灵活的在线聊天（LBT）帧长信号，无论是否显示下行链路 - 上行链路划分的信令。 进一步的方面提供了基站向UE发送复位指示，该UE将在UE通过重新同步时间结束的当前LBT帧之前提示UE监视下行链路信道保留信号。

    TECHNIQUES FOR IDENTIFYING RESOURCES TO TRANSMIT A CHANNEL RESERVATION SIGNAL
    439.
    发明申请
    TECHNIQUES FOR IDENTIFYING RESOURCES TO TRANSMIT A CHANNEL RESERVATION SIGNAL 审中-公开
    识别资源传输信道预留信号的技术

    公开(公告)号：US20160183296A1

    公开(公告)日：2016-06-23

    申请号：US14964136

    申请日：2015-12-09

    Applicant: QUALCOMM Incorporated

    Inventor： Srinivas Yerramalli ,  Tao Luo

    IPC: H04W74/00 ,  H04W72/04 ,  H04W74/08 ,  H04W16/14

    CPC classification number: H04W74/004 ,  H04W16/14 ,  H04W72/0413 ,  H04W72/0453 ,  H04W72/1289 ,  H04W74/002 ,  H04W74/08 ,  H04W74/0816

    Abstract: Techniques are described for wireless communication. A first method includes winning, at a UE, contention for access to a channel of a shared radio frequency spectrum band; identifying a number of frequency resources of the band that are allocated to the UE for at least one uplink transmission following the winning contention for access; and transmitting a channel reservation signal using a set of frequency resources associated with the identified number of frequency resources. A second method includes winning, at a UE, contention for access to a channel of a shared radio frequency spectrum band; identifying a number of frequency resources of the band that are pre-designated by a base station for transmission of a channel reservation signal; and transmitting the channel reservation signal, after the winning contention for access, using a set of frequency resources associated with the identified number of pre-designated frequency resources.

    Abstract translation: 技术描述为无线通信。 第一种方法包括在UE处赢得对共享射频频带的信道的访问; 识别在所述获胜争用接入之后分配给所述UE的至少一个上行链路传输的所述频带的频率资源的数量; 以及使用与所识别的频率资源数量相关联的一组频率资源来发送信道预约信号。 第二种方法包括在UE处赢得对共享射频频带的信道的访问; 识别由基站预先指定用于传输信道预约信号的频带的频率资源的数量; 以及在所述获胜争用访问之后，使用与所识别的预定频率资源数量相关联的一组频率资源来发送所述信道预约信号。

    MULTI-CHANNEL CSI FEEDBACK FOR LTE/LTE-A WITH UNLICENSED SPECTRUM
    440.
    发明申请
    MULTI-CHANNEL CSI FEEDBACK FOR LTE/LTE-A WITH UNLICENSED SPECTRUM 有权
    具有不同频谱的LTE / LTE-A的多通道CSI反馈

    公开(公告)号：US20160119951A1

    公开(公告)日：2016-04-28

    申请号：US14922724

    申请日：2015-10-26

    Applicant: QUALCOMM Incorporated

    Inventor： Siddhartha Mallik ,  Tao Luo ,  Srinivas Yerramalli

    IPC: H04W74/00 ,  H04W52/34

    CPC classification number: H04W52/346 ,  H04L5/001 ,  H04L5/0048 ,  H04L5/0053 ,  H04L27/0006 ,  H04W74/0808

    Abstract: Multi-channel channel state information (CSI) design is disclosed for long term evolution (LTE)/LTE-Advanced (LTE-A) systems with unlicensed spectrum. A “reference” CSI process defined for each channel/carrier. The reference CSI process is defined across each channel in any particular band that the transmitter is configured to support. The transmit power for such reference CSI processes is spread equally over each such channel. In order to report CSI for a subset of channels under an unequal power split assumption, a user equipment (UE) may apply a different power offset in the computation of the CSI process. Alternatively, an auxiliary CSI process may be defined for reporting CSI of a subset of channels with unequal distribution of powers across different channels in a band.

    Abstract translation: 公开了具有非许可频谱的长期演进（LTE）/ LTE-Advanced（LTE-A）系统的多信道信道状态信息（CSI）设计。 为每个频道/载波定义的“参考”CSI进程。 在发射机被配置为支持的任何特定频带中的每个信道上定义参考CSI进程。 这种参考CSI过程的发射功率在每个这样的信道上均匀分布。 为了在不相等的功率分配假设下报告信道子集的CSI，用户设备（UE）可以在CSI过程的计算中应用不同的功率偏移。 或者，可以定义辅助CSI过程，用于报告在频带中不同信道上的功率分配不等的信道子集的CSI。

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