IP network transmission method, system and equipment automatically adapting network jitter

Abstract

The invention discloses an IP network transmission method for automatically adapting network dithering, which comprises the following steps: IP data messages in a plurality of cycles are received; according to the IP data messages in a plurality of cycles, whether the dithering excesses a set dithering threshold is judged; if the dithering excesses the set dithering threshold, an amplitude of adjusting clock frequency is reduced to achieve the aim of adjusting a loop bandwidth of a phase-locked loop; if the dithering does not excess the set dithering threshold, a local clock is adjusted according to an actual frequency deviation value. The invention discloses an IP network transmission system and equipment for automatically adapting network dithering. When IP restores the clock, according to the network dithering situation, the invention can automatically select proper parameters for adjusting local clock frequency, thereby achieving the aim of clock synchronization, ensuring the rapidity of the clock synchronization and meeting the accuracy of the clock synchronization.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an IP (Internet Protocol, Internet Protocol) network transmission method, system and equipment adaptive to network jitter. Background technique [0002] The clock synchronization of network nodes such as BTS (Base Transceiver Station, Base Transceiver Station) has always been a key technology that has attracted much attention. The performance of clock synchronization directly affects the communication quality of the base station. At present, the existing synchronization technology adopts GPS (Global Position System, global positioning system), BITS (Building Integrated Timing Supply System, communication building integrated timing supply system) and other reference clock sources to realize clock synchronization, PWE3 (Pseudo Wire Emulation edge-to- -edge, edge-to-edge pseudo-wire emulation) based on the method of recovering the clock based on the statistics of rece...

AI Technical Summary

Problems solved by technology

Once there is a large jitter in the network, the performance of the recovered clock will be poor. In the current IP clock recovery scheme, in order to filter out the influence of network jitter and drift on the frequency offset, long-term filtering is used, resulting in clock synchronization time If it is too long, it will affect the business use, and if there is a large frequency deviation in the reference source, it will take a long time to reflect it

However, if a smaller filter period is used, the jitter will be larger, which will cause the output clock to fail to meet the requirements.

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