Adaptive silencing mechanism for device-to-device (D2D) discovery

    公开(公告)号:US09609502B2

    公开(公告)日:2017-03-28

    申请号:US14582990

    申请日:2014-12-24

    CPC classification number: H04W8/005 H04W4/80 H04W48/12

    Abstract: Novel adaptive silencing schemes for device-to-device (D2D) discovery based on loading conditions in a discovery zone are disclosed herein. These adaptive silencing schemes can be used to mitigate interference and data collisions in networks where D2D connections can be formed. In some embodiments, a silencing factor is used to probabilistically determine whether a user equipment (UE) will transmit one or more D2D discovery signals in the discovery zone. Loading conditions in a current discovery zone can be estimated using several different approaches and metrics described herein. The silencing factor can be increased or decreased for a subsequent discovery zone based on the values of one or more of the metrics described herein for the current discovery zone.

    Method for improving short-term fairness and efficiency in wireless local area networks
    82.
    发明授权
    Method for improving short-term fairness and efficiency in wireless local area networks 有权
    提高无线局域网短期公平性和效率的方法

    公开(公告)号:US09480073B2

    公开(公告)日:2016-10-25

    申请号:US14469246

    申请日:2014-08-26

    CPC classification number: H04W72/085 H04W74/085 H04W84/12

    Abstract: A wireless communication device comprises a transceiver to communicate directly with one or more separate wireless devices in accordance with a WiFi communication protocol, and a controller. The controller is configured to initiate transmission of information using the transceiver upon expiration of a first contention window (CW) count value, detect whether the transmission is successful, change the CW count value to a second CW count value when the transmission is unsuccessful, and change the CW count value from the first CW count value to a third CW count value when the transmission is successful, wherein the third CW count value is a maximum value of one of the first CW count value divided by a specified binary number or a specified minimum CW count value.

    Abstract translation: 无线通信设备包括根据WiFi通信协议与一个或多个单独的无线设备直接通信的收发器和控制器。 控制器被配置为在第一争用窗口(CW)计数值到期时使用收发器发起信息的传输,检测传输是否成功,当传输不成功时将CW计数值改变为第二CW计数值;以及 当传输成功时,将CW计数值从第一CW计数值改变为第三CW计数值,其中第三CW计数值是第一CW计数值之一除以指定二进制数或指定的二进制数之一的最大值 最小CW计数值。

    Cell discovery and wake up through device-to-device discovery protocols
    83.
    发明授权
    Cell discovery and wake up through device-to-device discovery protocols 有权
    通过设备到设备发现协议的小区发现和唤醒

    公开(公告)号:US09456406B2

    公开(公告)日:2016-09-27

    申请号:US14229652

    申请日:2014-03-28

    Abstract: Embodiments of the present disclosure are directed towards devices and methods for discovering and waking up dormant access nodes in cellular networks. In one embodiment, the dormant access nodes passively participate in a device-to-device discovery process to identify potential user equipment nearby. Upon identifying a potential user equipment, the dormant access node may wake itself up and inform a serving access node that that is able to service the user equipment. In another embodiment, dormant access nodes may transmit a discovery message periodically. Upon receiving the discovery message a user equipment may report the availability of the dormant access node to its serving access node.

    Abstract translation: 本公开的实施例涉及用于发现和唤醒蜂窝网络中的休眠接入节点的设备和方法。 在一个实施例中,休眠接入节点被动地参与设备到设备发现过程以识别附近的潜在用户设备。 在识别潜在的用户设备之后,休眠接入节点可以唤醒自身并通知服务接入节点能够为用户设备提供服务的接入节点。 在另一个实施例中,休眠接入节点可以周期性地发送发现消息。 在接收到发现消息后,用户设备可以向其服务接入节点报告休眠接入节点的可用性。

    CHANNEL RESERVATION FOR OPERATION IN AN UNLICENSED SPECTRUM
    84.
    发明申请
    CHANNEL RESERVATION FOR OPERATION IN AN UNLICENSED SPECTRUM 有权
    在不同频谱范围内进行频道预约操作

    公开(公告)号:US20150312793A1

    公开(公告)日:2015-10-29

    申请号:US14543670

    申请日:2014-11-17

    Abstract: Embodiments described herein relate generally to a communication between a user equipment (“UE”) and an evolved Node Bs (“eNBs”) in a plurality of frequency bands. An eNB may transmit cross-carrier, cross-subframe scheduling information to a UE in a licensed frequency band. In response reception of the scheduling information, the UE may sense a wireless transmission medium to determine if the medium is idle. If the medium is idle, the UE may generate and transmit a request to reserve the medium in the unlicensed frequency band (e.g., a Clear-to-Send message). The eNB may transmit downlink data to the UE in the unlicensed frequency band. Other embodiments may be described and/or claimed.

    Abstract translation: 本文所描述的实施例一般涉及用户设备(“UE”)和多个频带中的演进节点B(“eNB”)之间的通信。 eNB可以向许可频带中的UE发送跨载波跨子帧调度信息。 响应于调度信息的接收,UE可以感测无线传输介质以确定介质是否空闲。 如果介质空闲,则UE可以生成并发送在非许可频带(例如,清除发送消息)中保留介质的请求。 eNB可以在非许可频带中向UE发送下行链路数据。 可以描述和/或要求保护其他实施例。

    LOW LATENCY PHYSICAL RANDOM ACCESS CHANNEL DESIGN

    公开(公告)号:US20210204316A1

    公开(公告)日:2021-07-01

    申请号:US16085532

    申请日:2017-04-14

    Abstract: Described is an apparatus of an Evolved Node-B (eNB) operable to communicate with a User Equipment (UE) on a wireless network. The apparatus may comprise a first circuitry and a second circuitry. The first circuitry may be operable to initiate a Listen-Before-Talk (LBT) procedure on a bandwidth of the wireless network, the bandwidth being unlicensed spectrum. The second circuitry may be operable to generate a transmission if the LBT procedure indicates that the bandwidth is idle, the transmission comprising a Physical Random Access Channel (PRACH) preamble portion and a message portion.

    INTER-NODE INTERFERENCE AVOIDANCE
    88.
    发明申请

    公开(公告)号:US20200288410A1

    公开(公告)日:2020-09-10

    申请号:US16475667

    申请日:2017-12-29

    Abstract: Described is an apparatus of a User Equipment (UE). The apparatus may comprise a first circuitry and a second circuitry. The first circuitry may be operable to establish that Downlink (DL) transmissions from a second Evolved Node-B (eNB) will interfere in one or more subframes with Uplink (UL) transmissions from the UE to a first eNB. The second circuitry may be operable to modulate a UL transmission power based upon the established interference condition.

    PAGING AND ESSENTIAL SYSTEM INFORMATION BLOCK (SIB) TRANSMISSION IN THE UNLICENSED INTERNET OF THINGS (U-IOT) SYSTEM

    公开(公告)号:US20200169955A1

    公开(公告)日:2020-05-28

    申请号:US16478246

    申请日:2018-06-13

    Abstract: Machines or networked devices such as internet of things (IoT) devices operate to generate an unlicensed IoT (U-IoT) communication or enhanced Machine Type Communication (eMTC) based on frequency hopping operations on different channels. An anchor channel can be configured to carry system information and paging messages for the U-IoT/eMTC communication on the different channels. The system information and paging messages can include essential system information such as a system information block MulteFire (SIB-MF) message. Physical channels can be configured to enable component carriers anchored to a long term evolution (LTE) licensed band, and entirely comprise unlicensed carrier components that are unanchored to any LTE component carrier in a standalone configuration to enable transmission of the U-IoT communication in standalone communications in an unlicensed band.

    Apparatuses for DMRS design or processing for guard interval or zero tail DFT spread OFDM systems

    公开(公告)号:US10560301B2

    公开(公告)日:2020-02-11

    申请号:US15747009

    申请日:2016-03-23

    Abstract: Disclosed are apparatuses for communication devices. An apparatus for a communication device includes control circuitry configured to determine a discrete Fourier transform (DFT) of a constant amplitude zero autocorrelation waveform (CAZAC) sequence appended with zeros in the time domain to generate a frequency domain interpolated CAZAC sequence. The control circuitry is also configured to determine an inverse discrete Fourier transform (IDFT) of the frequency domain interpolated CAZAC sequence to generate a demodulation reference signal (DMRS), and cause the DMRS to be transmitted through a cellular data network. An apparatus for a communication device includes control circuitry configured to perform a Fourier transform on a received DMRS to obtain a resulting signal, and use the resulting signal as a reference to demodulate orthogonal frequency-division multiplexing (OFDM) symbols. The control circuitry is also configured to perform a minimum mean squares estimation (MMSE) channel estimation on the resulting signal.

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