公开(公告)号：US09059811B2

公开(公告)日：2015-06-16

申请号：US13894638

申请日：2013-05-15

申请人： MICROSEMI SEMICONDUCTOR ULC

发明人： Jun Huang ,  Gary Q. Jin

IPC分类号： H04J3/06 ,  H04L12/26

CPC分类号： H04J3/0682 ,  H04J3/0664 ,  H04L43/0852

摘要： In a computer-implemented method of adjusting a local clock at a receiver in a packet network, the local clock is generated by a phase locked loop locked to a master clock with the aid of time-stamped timing packets arriving over the network from the master clock with a packet delay distribution about a nominal delay. The timing packets are filtered to adjust for the packet delay distribution. A control input for the phase locked loop is derived from the timing packets. The amount of skew in the packet delay distribution about the nominal delay is determined, and the arrival times of timing packets are then selectively modified to correct for the amount of skew in the packet delay variation distribution prior to filtering the timing packets.

摘要翻译： 在以分组网络中的接收机调整本地时钟的计算机实现的方法中，通过锁定到主时钟的锁相环产生本地时钟，借助于来自主设备的网络到达的时间戳定时分组 具有关于标称延迟的分组延迟分布的时钟。 对数据包延迟分布进行滤波以调整定时数据包。 从定时包导出锁相环的控制输入。 确定关于标称延迟的分组延迟分布中的偏斜量，然后选择性地修改定时分组的到达时间，以在滤波定时分组之前校正分组延迟变化分布中的偏斜量。

公开(公告)号：US20130308660A1

公开(公告)日：2013-11-21

申请号：US13894638

申请日：2013-05-15

申请人： MICROSEMI SEMICONDUCTOR ULC

发明人： Jun Huang ,  Gary Q. Jin

IPC分类号： H04J3/06

CPC分类号： H04J3/0682 ,  H04J3/0664 ,  H04L43/0852

摘要： In a computer-implemented method of adjusting a local clock at a receiver in a packet network, the local clock is generated by a phase locked loop locked to a master clock with the aid of time-stamped timing packets arriving over the network from the master clock with a packet delay distribution about a nominal delay. The timing packets are filtered to adjust for the packet delay distribution. A control input for the phase locked loop is derived from the timing packets. The amount of skew in the packet delay distribution about the nominal delay is determined, and the arrival times of timing packets are then selectively modified to correct for the amount of skew in the packet delay variation distribution prior to filtering the timing packets.

摘要翻译： 在以分组网络中的接收机调整本地时钟的计算机实现的方法中，通过锁定到主时钟的锁相环产生本地时钟，借助于来自主设备的网络到达的时间戳定时分组 具有关于标称延迟的分组延迟分布的时钟。 对数据包延迟分布进行过滤以调整定时数据包。 从定时包导出锁相环的控制输入。 确定关于标称延迟的分组延迟分布中的偏斜量，然后选择性地修改定时分组的到达时间，以在滤波定时分组之前校正分组延迟变化分布中的偏斜量。