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A selection method for NTP time server

A time server and timing technology, applied in digital transmission systems, electrical components, transmission systems, etc.

Inactive Publication Date: 2010-12-29
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the time server 11 selection algorithm set by the NTP protocol itself has relatively high computational complexity and precision, and at the same time, the computing power and speed of the chip on the network element device 12 cannot meet this requirement. Difficult to apply

Method used

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  • A selection method for NTP time server
  • A selection method for NTP time server
  • A selection method for NTP time server

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] like figure 2 , NTP time server selection method of the present invention comprises the following concrete steps:

[0027] 210) The NTP CLIENT in the network element device starts running;

[0028] 220) Setting or directly reading the priority of each time server that has been set;

[0029] 230) Waiting for a longer time interval to arrive;

[0030] 240) judging whether the number of failures of the high-priority time server reaches the maximum allowable number of selections N; yes, enter step 241); no, enter step 242);

[0031] 241) select the next priority time server, proceed to step 250);

[0032] 242) select this high-priority time server, and proceed to step 250);

[0033] 250) judging that the time comparison is successful, yes, return to step 230); no, enter the next step;

[0034] 260) The number of failures of the selected time server is increased by one;

[0035] 270) Judging that the number of times of failure of all time servers has reached the maxim...

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Abstract

The invention relates to a selecting method of NTP time server, firstly, setting the maximum permissible selecting times N and the priority of each time server (11), then in each timing interval, a network element device (12) selects time servers (11) according to the maximum permissible selecting times N and the priority in order. The method selects time servers through setting the priority and simple counting, is completely suitable for network element devices, solves the problems that the computing capacity and the speed of a chip on the network element device fall behind the selection algorithm of NTP which sets a time server by itself.

Description

technical field [0001] The invention relates to communication and network synchronization, in particular to a specific method for selecting a time server in network element equipment using the network time protocol NTP for time synchronization. Background technique [0002] In a communication network, network element devices have their own working hours, and the standard network time protocol (NTP) is usually used for time synchronization. Operators provide multiple standard NTP servers, and network element devices need to select one of them as the corresponding time server. Specific as figure 1 , the solid arrow in the figure indicates the NTP protocol, and the dotted arrow indicates the network management protocol. The network manager 13 of the operator manages the network element devices 12 of equipment vendors A and B. The network element devices A, B and the network manager 13 all need to synchronize time through the NTP protocol. They need to select A, B, One of C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L7/00
Inventor 边海蓉
Owner ZTE CORP