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Clock link switching method and device and base station

A link switching and link technology, which is applied in synchronization devices, time division multiplexing systems, multiplexing communications, etc., can solve the problems of passive and rigid switching of master and backup clocks, and low accuracy of synchronization data, and saves energy. Switching time, improving synchronization performance, fast and accurate switching effect

Inactive Publication Date: 2017-06-27
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a clock link switching method, device and base station, which solves the problems of passive rigid switching of active and standby clocks and low synchronization data accuracy in the prior art

Method used

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  • Clock link switching method and device and base station
  • Clock link switching method and device and base station
  • Clock link switching method and device and base station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] like figure 1 As shown, the embodiment of the present invention provides a clock link switching method, including:

[0071] Step S101: Receive the first synchronization information sent by the active clock server and the second synchronization information sent by the standby clock server.

[0072] The base station establishes different clock links with the active clock server and the standby clock server respectively, and exchanges synchronization information through respective clock links. Among them, the base station receives the first synchronization information sent by the active clock server and feeds back the response information, and performs synchronization information interaction with the active clock server; and the base station does not feed back the response information after receiving the second synchronization information sent by the standby clock server , and the standby clock server is one-way information transmission, and the second synchronization inf...

Embodiment 2

[0079] The first embodiment above introduces the clock link switching method in the scenario where both the active clock server and the standby clock server are available. The following embodiment will further describe it in conjunction with other scenarios.

[0080] Among them, such as figure 2 As shown, after step S101, the clock switching method also includes:

[0081] Step S201: Detect the packet loss rate or availability of the master clock server according to the first synchronization information.

[0082] Wherein, the first synchronization information carries clock level information that can determine whether the clock server is available. Generally, a clock level of 6 means that the clock of the clock server is available, otherwise it is unavailable. In addition, the base station may also calculate the packet loss rate of the master clock link by counting the packet data carried in the first synchronization information.

[0083] Step S202: when it is detected that t...

Embodiment 3

[0086] Embodiment 1 and Embodiment 2 above respectively introduce the clock link switching methods in different scenarios, and the above switching methods will be further explained below in conjunction with the accompanying drawings.

[0087] The first synchronization information includes: an Announce message, a Sync message, and a delayed response message (Delay_Response message), and the second synchronization information includes: an Announce message and a Sync message.

[0088] Specifically, step S102 includes the following steps:

[0089] Calculate the jitter value of the master clock link according to the receiving time and sending time of the first synchronization information within a predetermined time period.

[0090] like image 3 As shown, the master clock server periodically sends a Sync message to the base station, and the Sync message carries sending time information, that is, the sending time of the first synchronization information. The transmission time of t...

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Abstract

The invention discloses a clock link switching method and device and a base station. The method comprises the steps of receiving first synchronization information sent by a main clock server and second synchronization information sent by a standby clock server; according to the first synchronization information and the second synchronization information, calculating a jitter value difference between a main clock link and a standby clock link and a packet loss rate of the standby clock link; and when the jitter value difference lasts for preset time in a preset range and the packet loss rate of the standby clock link is lower than a first preset value, using the standby clock link as a new main clock link. According to the clock link switching method and device and the base station which are disclosed by the invention, by comparing and analyzing advantages and disadvantages of clock performance of the main clock link and the standby clock link and timely selecting the clock server with good clock performance to switch into a clock source, rapid and accurate switching of the clock links can be implemented, link switching time is saved, and synchronization performance of the links is improved to a certain degree.

Description

technical field [0001] The invention relates to the field of clock synchronization and switching, in particular to a clock link switching method, device and base station. Background technique [0002] In order to solve the lack of timing synchronization capability of Ethernet, the computer and network industries have developed a software-based Network Time Protocol (NTP, Network Time Protocol) to improve the timing synchronization capability between network devices. The synchronization accuracy of subsequent NTP versions can reach the μs level, but it still cannot meet the accuracy required by measuring instruments and industrial control. The IEEE1588 standard was born in order to solve the timing synchronization needs of distributed networks for measurement and control applications. [0003] The full name of the IEEE1588 protocol is "Precision Clock Synchronization Protocol Standard for Network Measurement and Control Systems". The basic idea is to synchronize the interna...

Claims

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Application Information

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IPC IPC(8): H04J3/06H04W24/04H04W24/08H04W36/30
CPCH04J3/06H04L7/00H04W24/04H04J3/0641H04W24/08H04W36/30
Inventor 冯瑞雷
Owner ZTE CORP
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