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    • 11. 发明申请
    • SWITCHING BETWEEN CELLULAR AND LICENSE-EXEMPT (SHARED) BANDS
    • 细胞与许可证(共享)银行之间的切换
    • WO2013013412A1
    • 2013-01-31
    • PCT/CN2011/077730
    • 2011-07-28
    • RENESAS MOBILE CORPORATIONWANG, HaifengXU, JingZHOU, TingLI, ZhenhongZOU, WeiDU, Jinling
    • WANG, HaifengXU, JingZHOU, TingLI, ZhenhongZOU, WeiDU, Jinling
    • H04W12/00
    • H04W36/165H04W36/0055H04W36/06H04W36/14H04W76/14
    • A method and an apparatus for switching D2D data communications between a licensed and a license-exempt band are disclosed. A D2D device receives from a cellular network a pre-switch notification to prepare for a switch of its D2D communications, and in response adopts a temporary strategy for conducting its D2D transmissions prior to the switch. After the switch the D2D device discontinues the temporary strategy. In one embodiment the temporary strategy and its duration are indicated in the pre-switch notification. Two example temporary strategies are presented: 'no-new-data' where new data transmissions are suspended and data re-transmissions are sent with high reliability; and 'no-feedback' where new data is sent with high reliability and data re-transmissions are suspended. Different embodiments have the cellular network access node or D2D device contending for the radio resource in the license-exempt frequency band.
    • 公开了一种在许可证和免许可频段之间切换D2D数据通信的方法和装置。 D2D设备从蜂窝网络接收预切换通知以准备其D2D通信的切换,并且响应采用用于在切换之前进行其D2D传输的临时策略。 开关后,D2D设备停止临时策略。 在一个实施例中,临时策略及其持续时间在切换前通知中指示。 提出了两个示例性的临时策略:暂停新数据传输的“新数据”,高可靠性发送数据重传; 和“无反馈”,其中发送新数据的高可靠性和数据重传被暂停。 不同的实施例具有蜂窝网络接入节点或D2D设备在免许可频段中竞争无线电资源。
    • 18. 发明申请
    • DIRECT-SEQUENCE CDMA METHOD AND DEVICE
    • 直接序列CDMA方法和设备
    • WO2005057824A2
    • 2005-06-23
    • PCT/IB2004/003284
    • 2004-10-08
    • NOKIA CORPORATIONNOKIA INC.WANG, HaifengXU, JingCHEN, MingCHENG, Shixin
    • WANG, HaifengXU, JingCHEN, MingCHENG, Shixin
    • H04L
    • H04L25/03159H04L5/026H04L27/2607H04L2025/03522H04L2025/03617
    • In code division multiple access communications wherein a plurality of data streams carrying a plurality of transmit symbols are spread by a plurality of assigned spread code, the data streams are divided into a plurality of data blocks and a plurality of prefixes in symbol-level are added to the data blocks prior to the data streams being spread and combined for transmission. At the receive side, the prefixes are removed from the received data stream in the time domain and the prefix-removed data stream is converted into a transformed signal in the frequency domain. A feed-forward filter is used to implement a joint equalization and despreading operation by element-by-element multiplications in frequency domain. A feedback filter is used to remove the inter-symbol interference and update the feed-forward filter through a feedback loop.
    • 在码分多址通信中,其中携带多个发送符号的多个数据流由多个分配的扩展码扩展,将数据流分成多个数据块,并且添加符号级中的多个前缀 在数据流被传播和组合用于传输之前到数据块。 在接收侧,在时域中从接收的数据流中去除前缀​​,并将前缀去除的数据流转换成频域中的变换信号。 前馈滤波器用于通过频域中的逐个元素乘法来实现联合均衡和解扩操作。 反馈滤波器用于消除符号间干扰,并通过反馈回路更新前馈滤波器。