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Time regulation algorithm for network time synchronizing in telecommunication field

A network time and time technology, applied in Ethernet or other transmission network fields, can solve the problems of low precision and inability to be widely used, and achieve the effects of good linear consistency, strong anti-interference ability, and high time synchronization accuracy

Inactive Publication Date: 2007-03-21
SHANGHAI SUSR TELECOM TECH
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Problems solved by technology

[0011] The third is a wireless clock: Internet time synchronization and dial-up time setting services have a common disadvantage, that is, a cable is required to connect the time server to the computer
The latter three methods cannot be widely used due to the need for special hardware support
Although the first method of Internet time synchronization is convenient to use, it has low precision and needs some improvement

Method used

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  • Time regulation algorithm for network time synchronizing in telecommunication field
  • Time regulation algorithm for network time synchronizing in telecommunication field
  • Time regulation algorithm for network time synchronizing in telecommunication field

Examples

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Embodiment

[0041] As shown in Figure 1, it is a flowchart of the client time synchronization solution.

[0042] Step 1. In the local area network N, there is a network time server S supporting the NTP protocol, and a client device C, which is also in the N network. The C device obtains the time from the S device through the network, and C needs to provide accurate The second pulse output is used by other devices, and the C device does not have a hardware platform for frequency adjustment. In this example, the SNTP algorithm and the network time approximation algorithm are used to set the deviation correction threshold ε and adjustment range δ of the network time approximation algorithm, so that δ<ε. The threshold ε is set to 100 microseconds, and the adjustment range δ is set to 30 microseconds.

[0043] Step 2. Access the client C server, the time deviation of the client C server, as shown in Figure 2, it can be seen that due to the deviation of the clock frequency, the time of the C d...

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Abstract

A time regulation algorithm of network time synchronization in telecommunication field includes utilizing network time approximation algorithm and applying time convergence-approximation method to make time of device be converged and approximated to time of server step by step, finally controlling deflection of standard time between time of device and time server to be at a small range.

Description

technical field [0001] The invention relates to a time adjustment algorithm for network time synchronization in the telecommunication field, which is especially suitable for Ethernet or other transmission networks, and is used to accurately realize the time synchronization of each device in the network. Background technique [0002] With the personal computer revolution of the 1970s came a huge time and frequency user base. These are the people who need to keep their computers on accurate time. But computer clocks cannot be particularly accurate in keeping time, which is determined by the time keeping principle of computers. [0003] Since the introduction of the IBM-AT personal computer in 1984, all PC compatibles have kept time in the same way. Whether they are 286, 386, 486 or Pentium microprocessors, every PC contains two clocks: a soft clock and a hard clock. [0004] The soft clock is generated by an Intel8254 timer or similarly capable device. The timer generates ...

Claims

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Application Information

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IPC IPC(8): H04L12/24
Inventor 张永生许永毅王传法王炼栋
Owner SHANGHAI SUSR TELECOM TECH
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