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    • 5. 发明授权
    • Autonomous pulse train timing controls for time-mark alignment
    • 自动脉冲序列时序控制用于时间标记对齐
    • US5398263A
    • 1995-03-14
    • US4407
    • 1993-01-14
    • Jan P. Vanderspool, IIMark G. Spiotta
    • Jan P. Vanderspool, IIMark G. Spiotta
    • H03L7/085H03L7/099H04H20/67H04L7/00H04L7/033H04B7/00
    • H04H20/67H03L7/085H03L7/0992H04L7/0331H04L7/0083
    • A phase lock loop (700) maintains a freewheeling capability while making phase corrections to a sample clock signal based on a precision timing signal. The phase corrections are dispersed over time such that data reception in uninterrupted so that data integrity is maintained during the phase corrections. The phase lock loop (700) includes a first divider circuit (721) having a divisor n, coupled for dividing the incoming clock signal by n to produce a bit clock signal. A second divider circuit (725) is coupled to the bit clock signal for dividing the bit clock signal to produce the sample clock signal. A phase comparator (717) is coupled to a 1PPS signal that provides a time-mark to said phase lock loop (700) for calibration, wherein the phase comparator (717) measures a number of input clock signal cycles from a predetermined edge of the 1PPS signal to a predetermined edge of the sample clock signal and provides a correction signal indicative of a number of input clock signal cycles and a phase direction error between the sample clock signal and the 1PPS signal for modifying a value of the divisor n for correcting the measured phase error simultaneously with data reception.
    • 锁相环(700)保持续流能力,同时基于精密定时信号对采样时钟信号进行相位校正。 相位校正随着时间的推移而分散,使得数据接收不间断,从而在相位校正期间维持数据完整性。 锁相环(700)包括具有除数n的第一除法器电路(721),被耦合用于将输入时钟信号除以n以产生位时钟信号。 第二除法器电路(725)耦合到位时钟信号,以分频位时钟信号以产生采样时钟信号。 相位比较器(717)耦合到1PPS信号,其向所述锁相环(700)提供时间标记用于校准,其中相位比较器(717)测量来自所述锁相环(700)的预定边沿的多个输入时钟信号周期 1PPS信号发送到采样时钟信号的预定边缘,并提供指示输入时钟信号周期数的校正信号和采样时钟信号与1PPS信号之间的相位误差,用于修改除数n的值以校正 与数据接收同时测量相位误差。
    • 9. 发明申请
    • USING A DYNAMICALLY-GENERATED SYMMETRIC KEY TO ESTABLISH INTERNET PROTOCOL SECURITY FOR COMMUNICATIONS BETWEEN A MOBILE SUBSCRIBER AND A SUPPORTING WIRELESS COMMUNICATIONS NETWORK
    • 使用动态生成的对称关键来建立移动用户和支持无线通信网络之间通信的互联网协议安全
    • US20120254615A1
    • 2012-10-04
    • US13076972
    • 2011-03-31
    • Ding MaMark G. Spiotta
    • Ding MaMark G. Spiotta
    • H04L9/32
    • H04L63/164H04W12/04
    • Embodiments provide a means for securing wireless network communications. A security association can be established between a mobile subscriber device (105) and an access router (125) of a wireless communications network (120), upon successful authentication of the mobile subscriber device (105). The security association can utilize a dynamically-generated IP security (IPsec) symmetric key (175) unique to the mobile subscriber device (105). Subsequent network communications between the mobile subscriber device (105) and the access router (125) can be secured using the IPsec symmetric key (175) to either directly authenticate and encrypt/decrypt or dynamically establish further security associations to authenticate and encrypt/decrypt the subsequent network communications (170). Securing of the network communications (175) can be performed as a substitute for or in addition to existing security measures of the wireless communications network (120).
    • 实施例提供了一种用于确保无线网络通信的手段。 在移动用户设备(105)的成功认证之后,可以在无线通信网络(120)的移动用户设备(105)和接入路由器(125)之间建立安全关联。 安全关联可以利用移动用户设备(105)唯一的动态生成的IP安全(IPsec)对称密钥(175)。 可以使用IPsec对称密钥(175)来确保移动用户设备(105)和接入路由器(125)之间的后续网络通信,以直接认证和加密/解密或动态地建立进一步的安全关联以认证和加密/解密 后续网络通信(170)。 可以执行网络通信(175)的保护作为对无线通信网络(120)的现有安全措施的替代或补充。