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    • 74. 发明申请
    • RS-BASED NETWORK TRANSMISSION METHOD
    • 基于RS的网络传输方法
    • US20080267113A1
    • 2008-10-30
    • US12110780
    • 2008-04-28
    • Eun-Taek LIMZongchuang LiangQi Wu
    • Eun-Taek LIMZongchuang LiangQi Wu
    • H04B7/14
    • H04B7/2606H04L5/0007H04L27/2601
    • A Relay System (RS)-based cellular network transmission method for MT having a function of single input and single output is provided. The method includes transmitting broadcast information to all RSs and Mobile Terminals (MTs); transmitting required data to each RS in an Orthogonal Frequency Division Multiplexing (OFDM) mode; performing the operations of selection of modulation scheme, addition of CP, addition of symbols for channel estimation and selection of OFDM symbols; feeding feedback information to the Base Station (BS); transmitting a synchronization request to the BS; transmitting a synchronization acknowledgement to the RS; transmitting information to each MT belonging to the BS; transmitting information to each MT belonging to the RS; the MT belonging to the BS transmitting ACK/NACK information to the BS; the MT belonging to the RS transmitting ACK/NACK information to the BS; and the BS informing the RS of the received ACK/NACK information.
    • 提供了具有单输入和单输出功能的MT的基于中继系统(RS)的蜂窝网络传输方法。 该方法包括向所有RS和移动终端(MT)发送广播信息; 以正交频分复用(OFDM)模式向每个RS发送所需数据; 执行调制方案的选择,CP的添加,用于信道估计的符号的添加和OFDM符号的选择的操作; 向基站(BS)馈送反馈信息; 向BS发送同步请求; 向RS发送同步确认; 向属于所述BS的每个MT发送信息; 向属于RS的每个MT发送信息; 属于BS的MT向BS发送ACK / NACK信息; 属于RS的MT向BS发送ACK / NACK信息; 以及通知RS所接收到的ACK / NACK信息的BS。
    • 76. 发明授权
    • Optical fiber having an expanded mode field diameter and method of expanding the mode field diameter of an optical fiber
    • US06321006B2
    • 2001-11-20
    • US09840607
    • 2001-04-24
    • Qi Wu
    • Qi Wu
    • G02B626
    • G02B6/262G02B6/2551G02B6/2552G02B6/2932
    • The present invention is directed to a generally small mode field diameter (“MFD”) optical fiber having a core bounded by a cladding, a cleaved end, and an expanded mode field diameter. The expanded mode field diameter is formed by thermally diffusing one or more dopants in the core of the small mode field diameter optical fiber using a highly localized heat source. The resulting adiabatic taper has an expanded mode field diameter that is optimized for connection to another optical fiber having a larger mode field diameter. The adiabatic taper is formed in the smaller mode field diameter optical fiber by aligning and abutting the cleaved ends of two fibers having different mode field diameter's to form a splice seam. The splice seam is offset a predetermined distance from the center of the region heated by a heat source to splice the fibers and expand the mode field diameters. As the mode field diameters expand, the splice loss across the splice is monitored. When the splice loss is at or sufficiently close to a target loss, heating is terminated, and the spliced optical fiber is cleaved where the mode field diameter of the smaller mode field diameter fiber portion of the spliced optical fiber is optically expanded to match the mode field diameter of another optical fiber.