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Method and system for supporting synchronization of a plurality of Institute of Electrical and Electronics Engineers (IEEE) 1588 clock domains

A clock domain, clock domain technology, applied in transmission systems, synchronization devices, digital transmission systems, etc.

Inactive Publication Date: 2012-01-25
SUZHOU CENTEC COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Different wireless backhaul networks have different master reference clocks, which requires the core network equipment carrying multiple mobile services to support multiple PTP clock synchronization domains, but the current standard has not considered this scenario

Method used

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  • Method and system for supporting synchronization of a plurality of Institute of Electrical and Electronics Engineers (IEEE) 1588 clock domains
  • Method and system for supporting synchronization of a plurality of Institute of Electrical and Electronics Engineers (IEEE) 1588 clock domains
  • Method and system for supporting synchronization of a plurality of Institute of Electrical and Electronics Engineers (IEEE) 1588 clock domains

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with various embodiments shown in the drawings. However, these embodiments do not limit the present invention, and any structural, method, or functional changes made by those skilled in the art according to these embodiments are included in the protection scope of the present invention.

[0027] The present invention provides a method for supporting multiple PTP synchronization domains on the same core device. The typical topological structure of multiple clock domains in the network is as follows: figure 1 shown. Wherein, region A is a clock domain, and region B is another clock domain. In clock domain A, GM_A is the master clock of this clock domain, connected to the clock source, responsible for distributing time information through the 1588 protocol; S_A is the slave clock of this clock domain, responsible for analyzing and calculating the 1588 messages distributed by the master clock The time ...

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Abstract

The invention provides a method and a system for supporting the synchronization of a plurality of Institute of Electrical and Electronics Engineers (IEEE) 1588 clock domains. The method comprises the following steps of: recording a time stamp in the receiving direction of a precision time protocol (PTP) message by using a default counter; analyzing the PTP message, acquiring a difference value between the default counter and a counter of the clock domain which corresponds to the message, and converting the time stamp in the receiving direction of the PTP message into the time stamp of the corresponding clock domain; and calculating by using the time stamp of the clock domain, and adjusting a result into the counter of the clock domain. A plurality of PTP clock synchronization services can be supported on a piece of core equipment, and the clock synchronization of all users is not influenced.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method and system for supporting synchronization of multiple IEEE1588 clock domains. Background technique [0002] With the development of the mobile communication industry and the widespread deployment of technologies such as TD-SCDMA / TD-LTE and CDMA2000, the requirements for time / phase synchronization of the wireless backhaul network are becoming more and more stringent. Each station in the traditional wireless backhaul network uses GPS to synchronize time and phase. Because the GPS antenna needs a 120-degree clearance angle, it is difficult to deploy and install. Due to various factors such as lightning strikes, the failure rate of GPS is high, and maintenance Difficult; and GPS cost is high, security stability is poor, so a kind of technology that solves the above-mentioned problems is urgently needed. [0003] At present, the PTP (Precision Time Protocol, de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/00
Inventor 蒋震许俊廖继平
Owner SUZHOU CENTEC COMM CO LTD