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    • 3. 发明申请
    • METHODS AND SYSTEMS FOR DETECTING BURST TRAFFIC
    • 检测冲击交通的方法和系统
    • US20140112156A1
    • 2014-04-24
    • US14117772
    • 2011-05-16
    • Gan Wen
    • Gan Wen
    • H04L12/26
    • H04L43/0847H04L43/087H04L43/16H04W24/08
    • Presented is an apparatus 200, 300, 400 and methods 500 for detecting any burst error condition on a network 204. The apparatus 200, 300, 400 measures the interval 206, 306, 406 between arriving packets 304, 404 on a network 204 and stores 208 a series of interval measurements for analysis. The apparatus 200, 300, 400 also provides a comparator 212, 322, 324, 426, 428 for determining if a burst error condition 330, 332, 434, 436 occurred. The method 500 shifts the stored interval values 306, 308, 310, 312, 314, 316, 406, 408, 410, 412, 414, 416 based on the arrival 304, 404 of the next packet and its associated interval value and sums 320, 418, 420, 422 a subset of the stored interval values 306, 308, 310, 312, 406, 408, 410, 412 for comparison to a pre-configured period 328, 432 to determine if a burst error condition 332, 436 exists for too few packets. The method 500 provides the sum 318, 418, 420, 422, 424 of a separate subset of stored interval values 308, 310, 312, 314, 316, 406, 408, 410, 412, 414, 416 to another comparator 322, 426 for comparison to a pre-configured period 326, 430 to determine if a burst error condition 330, 434 exists for too many packets.
    • 呈现的是设备200,300,400和用于检测网络204上的任何突发错误状况的方法500.设备200,300,400测量网络204上的到达分组304,404之间的间隔206,306,406并且存储 208一系列间隔测量用于分析。 装置200,300,400还提供用于确定突发错误状况330,332,434,436是否发生的比较器212,322,324,426,428。 方法500基于下一个分组的到达304,404及其相关联的间隔值和总和320来移动所存储的间隔值306,308,310,312,314,340,408,410,412,414,416, 418,420,422是所存储的间隔值306,308,310,312,406,408,410,412的子集,用于与预配置周期328,432进行比较,以确定突发错误条件332,436是否存在 数据包太少 方法500将存储的间隔值308,310,312,314,316,406,408,410,412,414,416的单独子集的318,318,420,422,424提供给另一个比较器322,426 用于与预配置周期326,430进行比较,以确定对于太多分组是否存在突发错误条件330,434。
    • 6. 发明申请
    • Phase-Locked Loop Control Voltage Determination
    • 锁相环控制电压测定
    • US20130214834A1
    • 2013-08-22
    • US13882208
    • 2010-12-01
    • Gan Wen
    • Gan Wen
    • H03L5/00H03L7/08
    • H03L5/00H03L7/08H03L7/085H03L7/10
    • A method and circuit is provided for determining a control voltage of a voltage controlled oscillator with fast frequency lock of a phase-locked loop and which is advantageous to the situation when an ultra-low frequency reference is used. The method and circuit determines a current error between a reference clock signal and a feedback clock signal, and checks if the error is larger than the threshold value which checks if an error sign indicator is set, i.e. the error has switched sign since startup of feedback loop; if the error sign indicator is not set, the circuit determines a divisor, kn, using the current error, en, current control voltage, un, previous error en−1, and previous control voltage, un−1; however, if the error sign indicator is set the circuit determines a divisor, kn, using stored values for the latest control voltage and error when the error was negative and stored values for the latest control voltage and error when the error was positive; furthermore, the method and circuit determines a control voltage step using the determined error divided by the divisor, kn, and determines a new control voltage using the current control voltage, un, and the determined control voltage step.
    • 提供了一种用于确定具有锁相环的快速锁定的压控振荡器的控制电压的方法和电路,并且对于使用超低频参考的情况是有利的。 该方法和电路确定参考时钟信号和反馈时钟信号之间的电流误差,并且检查误差是否大于阈值,该阈值检查是否设置了错误符号指示符,即,由于启动反馈,错误已经切换了标志 循环; 如果未设置错误符号指示器,则电路使用当前误差en,电流控制电压,un,先前错误en-1和先前的控制电压un-1来确定除数kn。 然而,如果设置了错误符号指示器,则当误差为负值时,电路使用存储的最新控制电压和误差值确定除数kn,当误差为正时,电路存储最新控制电压和误差值; 此外,该方法和电路使用确定的误差除以除数kn来确定控制电压阶跃,并且使用电流控制电压un和所确定的控制电压步长来确定新的控制电压。
    • 7. 发明授权
    • Methods and systems for detecting burst traffic
    • 检测突发流量的方法和系统
    • US09294374B2
    • 2016-03-22
    • US14117772
    • 2011-05-16
    • Gan Wen
    • Gan Wen
    • G01R31/08H04L12/28H04L12/26H04W24/08
    • H04L43/0847H04L43/087H04L43/16H04W24/08
    • Presented is an apparatus 200, 300, 400 and methods 500 for detecting any burst error condition on a network 204. The apparatus 200, 300, 400 measures the interval 206, 306, 406 between arriving packets 304, 404 on a network 204 and stores 208 a series of interval measurements for analysis. The apparatus 200, 300, 400 also provides a comparator 212, 322, 324, 426, 428 for determining if a burst error condition 330, 332, 434, 436 occurred. The method 500 shifts the stored interval values 306, 308, 310, 312, 314, 316, 406, 408, 410, 412, 414, 416 based on the arrival 304, 404 of the next packet and its associated interval value and sums 320, 418, 420, 422 a subset of the stored interval values 306, 308, 310, 312, 406, 408, 410, 412 for comparison to a pre-configured period 328, 432 to determine if a burst error condition 332, 436 exists for too few packets. The method 500 provides the sum 318, 418, 420, 422, 424 of a separate subset of stored interval values 308, 310, 312, 314, 316, 406, 408, 410, 412, 414, 416 to another comparator 322, 426 for comparison to a pre-configured period 326, 430 to determine if a burst error condition 330, 434 exists for too many packets.
    • 呈现的是设备200,300,400和用于检测网络204上的任何突发错误状况的方法500.设备200,300,400测量网络204上的到达分组304,404之间的间隔206,306,406并且存储 208一系列间隔测量用于分析。 装置200,300,400还提供用于确定突发错误状况330,332,434,436是否发生的比较器212,322,324,426,428。 方法500基于下一个分组的到达304,404及其相关联的间隔值和总和320来移动所存储的间隔值306,308,310,312,314,340,408,410,412,414,416, 418,420,422是所存储的间隔值306,308,310,312,406,408,410,412的子集,用于与预配置周期328,432进行比较,以确定突发错误条件332,436是否存在 数据包太少 方法500将存储的间隔值308,310,312,314,316,406,408,410,412,414,416的单独子集的318,318,420,422,424提供给另一个比较器322,426 用于与预配置周期326,430进行比较,以确定对于太多分组是否存在突发错误条件330,434。
    • 8. 发明授权
    • Phase-locked loop control voltage determination
    • 锁相环控制电压测定
    • US08564344B2
    • 2013-10-22
    • US13882208
    • 2010-12-01
    • Gan Wen
    • Gan Wen
    • H03L7/06
    • H03L5/00H03L7/08H03L7/085H03L7/10
    • A method and circuit is provided for determining a control voltage of a voltage controlled oscillator with fast frequency lock of a phase-locked loop and which is advantageous to the situation when an ultra-low frequency reference is used. The method and circuit determines a current error between a reference clock signal and a feedback clock signal, and checks if the error is larger than the threshold value which checks if an error sign indicator is set, i.e. the error has switched sign since startup of feedback loop; if the error sign indicator is not set, the circuit determines a divisor, kn, using the current error, en, current control voltage, un, previous error en−1, and previous control voltage, un−1; however, if the error sign indicator is set the circuit determines a divisor, kn, using stored values for the latest control voltage and error when the error was negative and stored values for the latest control voltage and error when the error was positive; furthermore, the method and circuit determines a control voltage step using the determined error divided by the divisor, kn, and determines a new control voltage using the current control voltage, un, and the determined control voltage step.
    • 提供了一种用于确定具有锁相环的快速锁定的压控振荡器的控制电压的方法和电路,并且对于使用超低频参考的情况是有利的。 该方法和电路确定参考时钟信号和反馈时钟信号之间的电流误差,并且检查误差是否大于阈值,该阈值检查是否设置了错误符号指示符,即,由于启动反馈,错误已经切换了标志 循环; 如果未设置错误符号指示器,则电路使用当前误差en,电流控制电压,un,先前错误en-1和先前的控制电压un-1来确定除数kn。 然而,如果设置了错误符号指示器,则当误差为负值时,电路使用存储的最新控制电压和误差值确定除数kn,当误差为正时,电路存储最新控制电压和误差值; 此外,该方法和电路使用确定的误差除以除数kn来确定控制电压阶跃,并且使用电流控制电压un和所确定的控制电压步长来确定新的控制电压。
    • 10. 发明申请
    • PROTOCOL STATE BASED PACKET FILTER
    • 基于协议状态的分组过滤器
    • US20150142988A1
    • 2015-05-21
    • US14391513
    • 2012-04-16
    • Gan Wen
    • Gan Wen
    • H04L29/08
    • H04L69/324
    • In a communication protocol wherein state machines maintained by protocol peer nodes transition state only in response to their current state and the state of the peer node, a packet filter engine (33) on a network node (30) is operative to inspect received protocol packets, and filter out redundant packets. The packet filter engine (33) retrieves a current state of a protocol state machine running on a remote node from a protocol packet, and the current state of the local node from a current state table (40). The two states are used to determine the next state of the local node (30). If the current state of the local node (30) and the next state of the local node (30) are the same, the local state machine will not transition states, and the packet is discarded. If the current state of the local node (30) and the next state of the local node (30) are different, the protocol packet is passed to a processor (44) for updating the local state machine and other processing. The processor (44) updates the current state table (40). In this manner, protocol packets including remote node state information, which will not result in a local state transition, are filtered from the processor (44), relieving its computational load.
    • 在通信协议中,由协议对等节点维护的状态机仅响应于其当前状态和对等节点的状态而转换状态,网络节点(30)上的分组过滤引擎(33)可操作以检查接收到的协议分组 并过滤出冗余数据包。 分组过滤引擎(33)从协议分组检索在远程节点上运行的协议状态机的当前状态,并从当前状态表(40)检索本地节点的当前状态。 这两个状态用于确定本地节点的下一个状态(30)。 如果本地节点(30)的当前状态和本地节点(30)的下一个状态相同,则本地状态机将不会转换状态,并且丢弃该分组。 如果本地节点(30)的当前状态和本地节点(30)的下一状态不同,则协议分组被传递到用于更新本地状态机的处理器(44)和其他处理。 处理器(44)更新当前状态表(40)。 以这种方式,从处理器(44)过滤掉不会导致局部状态转换的远程节点状态信息的协议包,从而减轻其计算负担。