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Method and device for dynamically adjusting PTP message rate

A packet rate and dynamic adjustment technology, applied in the direction of network traffic/resource management, electrical components, time division multiplexing system, etc., can solve problems such as network traffic load, packet rate mismatch, inconvenient operation, etc., to achieve reduction The effect of network traffic load

Inactive Publication Date: 2013-12-04
ZTE CORP
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Problems solved by technology

In this way, if the PTP packet rate is configured too high, it will cause unnecessary traffic load on the network. To reduce the PTP packet rate, you can only manually configure and modify it.
It is quite common that the PTP packet rate does not match, and the manual configuration will obviously bring a lot of inconvenience to the operation.

Method used

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  • Method and device for dynamically adjusting PTP message rate
  • Method and device for dynamically adjusting PTP message rate
  • Method and device for dynamically adjusting PTP message rate

Examples

Experimental program
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Embodiment Construction

[0056] The basic idea of ​​the present invention is: the BC device calculates the PTP message correction interval through the detected frequency offset, and requests the parent BC device of the BC device to adjust the PTP message rate when it determines that the PTP message correction interval exceeds the set threshold.

[0057] Since the frequency synchronization error can be quantified by the frequency offset (Frequency offset), the frequency offset can be used to calculate the absolute time offset within two PTP message correction intervals (PTP interval). For example: the frequency deviation on the BC equipment is 2ppm, then the absolute time deviation within 1 second is 2ppm×1s=2μs. Through this proportional relationship, you can configure the upper limit of the allowable absolute deviation between the correction times of two PTP packets (Absolute time error limit) on the BC device, which means that the BC device can tolerate The maximum time synchronization error between...

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Abstract

The invention discloses a method for dynamically adjusting a PTP message rate. The method includes the steps that a BC device calculates a PTP message modification interval through detected frequency deviation and requests a parent BC device body of the BC device to conduct PTP message rate adjustment when the PTP message modification interval is determined to exceed a set threshold value. The invention simultaneously discloses a device for dynamically adjusting the PTP message rate to achieve the method for dynamically adjusting the PTP message rate. According to the technical scheme, quality reduction of a frequency synchronism layer can be dynamically detected in real time, therefore, the PTP message rate can be timely improved, and quality compensation can be conducted for time synchronization accuracy reduction caused by quality degradation or switching of the frequency synchronism layer. Otherwise, when the synchronization accuracy of the frequency synchronism layer is quite high, the PTP message rate is lowered timely, and therefore network flow loads are reduced.

Description

technical field [0001] The invention relates to a precision time protocol (PTP, Precision Time Protocol) message rate adjustment technology, in particular to a method and device for dynamically adjusting the PTP message rate. Background technique [0002] With the rapid development of mobile communication network technologies (including 3G and 4G technologies), there are clear and high-precision requirements for time synchronization of mobile backhaul networks based on Packet Transfer Network (PTN) technology. [0003] The current time synchronization is mainly realized through the 1588v2 protocol, which is also called the Precision Time Protocol (PTP, Precision Time Protocol). However, it is necessary to achieve high-precision time synchronization, such as the 1.5 μs time required by the base station air interface of TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) and Long Term Evolution (LTE, Long Term Evolution) wireless networks synchronization accura...

Claims

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Application Information

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IPC IPC(8): H04W24/00H04W28/22
CPCH04J3/14H04J3/0667
Inventor 夏靓赵洪广
Owner ZTE CORP
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