公开(公告)号：US10972983B2

公开(公告)日：2021-04-06

申请号：US16075752

申请日：2017-02-02

Applicant: Nokia Solutions and Networks Oy

Inventor： Andrew Killen ,  Alex Hirsbrunner ,  Kirk Ingemunson ,  William Walsh

IPC: H04W52/02 ,  G01K1/022 ,  G01K3/10

Abstract: A method and apparatus may include activating, by a network node, power of a global-positioning-system receiver or power of an active antenna of the global-positioning-system receiver. The apparatus uses the global-positioning-system receiver to perform synchronization of the apparatus. The method may include receiving at least one measurement, wherein the at least one measurement includes real-time, predictive, or historic data. The method may also include determining a holdover duration based on the at least one measurement. The holdover duration corresponds to a length of time where the power of the global-positioning-system receiver or the power of the active antenna is to be turned off. The method may also include deactivating the power of the global-positioning-system receiver or the power of the active antenna for the holdover duration.

公开(公告)号：US09148278B1

公开(公告)日：2015-09-29

申请号：US14325784

申请日：2014-07-08

Applicant: Nokia Solutions and Networks Oy

Inventor： Dale Ray ,  William Walsh

IPC: H04L7/033

CPC classification number: H03L7/18 ,  H03L7/081 ,  H03L7/099

Abstract: Systems and techniques for oscillator control are described. A fixed or controlled oscillator feeds a plurality of evenly spaced tap points multiplexed to an output by a multiplexer. A phase change control circuit changes the multiplexer to a new tap point one phase tap at a time, with the change being made when an oscillator clock edge will not be repeated to an output. The phase change control circuit determines when to change the multiplexer setting based on the overflow of an accumulator, which is continuously summing an increment value. The sign of the accumulator increment value determines the direction of the multiplexor updates. The resulting output signal from the multiplexor is a new output frequency related to the oscillator frequency and the accumulator increment value. With a plurality of multiplexer controlled outputs and corresponding phase change control circuits, a plurality of output frequencies can be created from one oscillator.

Abstract translation: 描述了用于振荡器控制的系统和技术。 固定或受控振荡器馈送由多路复用器多路复用到输出的多个均匀间隔的抽头点。 一个相变控制电路一次将多路复用器改变为一个新的抽头点一相抽头，随着振荡器时钟沿不会重复到输出而发生变化。 相位变化控制电路基于累加器的溢出来确定何时改变多路复用器设置，累加器的上升是连续求和增量值。 累加器增量值的符号决定了多路复用器更新的方向。 来自多路复用器的结果输出信号是与振荡器频率和累加器增量值相关的新的输出频率。 利用多路复用器控制输出和相应的相变控制电路，可以从一个振荡器产生多个输出频率。