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    METHOD AND SYSTEM FOR PRE-ACCESSING CONFERENCE TELEPHONE AND NETWORK SIDE DEVICE
    1.
    发明公开
    METHOD AND SYSTEM FOR PRE-ACCESSING CONFERENCE TELEPHONE AND NETWORK SIDE DEVICE 有权
    方法和设备早期接入会议的电话和网络侧设备THEREFOR

    公开(公告)号：EP2547037A4

    公开(公告)日：2013-10-30

    申请号：EP11819279

    申请日：2011-01-14

    申请人： ZTE CORP

    发明人： ZHANG BAOHUA ,  DENG FANGMIN ,  YU SONG ,  XUE TAO ,  CAO YAOBIN

    IPC分类号： H04L12/18 ,  H04M3/436 ,  H04M3/56

    CPC分类号： H04L12/1822 ,  H04L12/1827 ,  H04M3/56 ,  H04M2203/50 ,  H04M2203/5009 ,  H04M2203/5027 ,  H04M2203/5054 ,  H04M2203/60 ,  H04W12/02 ,  H04W12/08

    摘要： A method for pre-accessing a conference telephone is disclosed in the present invention. The method includes that: a network side detects a received call whose target is a main control party after the main control party initiates an encryption conference telephone; the call is not accessed if the call is a non-encryption conversation; the call is allowed to be accessed if the call is an encryption conversation. A system for pre-accessing a conference telephone is also disclosed in the present invention, wherein, the system includes a pre-accessing processing unit and a call type detection unit of the network side. A network side device is also disclosed in the present invention. The present invention realizes the pre-accessing of the encryption conference telephone, thereby improving security of the encryption conversation as well as avoiding the problem that a user is frequently affected when performing the encryption conference telephone.

    DISPERSION AND NONLINEARITY COMPENSATION METHOD AND SYSTEM IN COHERENT OPTICAL COMMUNICATION SYSTEM
    3.
    发明公开
    DISPERSION AND NONLINEARITY COMPENSATION METHOD AND SYSTEM IN COHERENT OPTICAL COMMUNICATION SYSTEM 审中-公开
    方法和系统分散和光的非线性补偿在相干光传输系统

    公开(公告)号：EP2922219A4

    公开(公告)日：2015-12-30

    申请号：EP13805082

    申请日：2013-08-15

    申请人： ZTE CORP

    发明人： SHEN BAILIN ,  YU SONG ,  YANG JIE ,  LI MINLIANG

    IPC分类号： H04B10/2543 ,  H04B10/2513 ,  H04B10/299 ,  H04B10/61

    CPC分类号： H04B10/2513 ,  H04B10/2543 ,  H04B10/299 ,  H04B10/616 ,  H04B2210/252

    摘要： A dispersion and nonlinearity compensation method and system in a coherent optical communication system are provided. The method comprises: dividing a total length of an optical fiber into N steps with equal lengths, and performing dispersion compensation and then nonlinearity compensation in each step. The step of performing nonlinearity compensation in each step comprises: with a current sampling point being a center, performing sampling on respective 2k+1 sampling points of X and Y polarization states, calculating powers of 2(2k+1) sampling points, adding powers of sampling points at the same position on X and Y polarization states to obtain 2k+1 power values, performing weighted summation on the 2k+1 power values, then multiplying the weighted sum by a preset coefficient W to obtain a nonlinear phase angle of the current sampling point, and performing compensation according to the nonlinear phase angle, wherein, N and k are positive integers. In the technical solution according to the embodiment of the present invention, the mode of calculating the nonlinear phase angle is improved, and the calculation complexity is reduced.