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Method and device for expansion leading out clock function in SDH equipment

A technology of SDH equipment and clock, applied in the field of communication, can solve problems such as maintenance trouble

Active Publication Date: 2008-12-03
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In engineering, especially in the test process of the initial stage, due to the frequent switching of the system clock source, that is, the selection result of the selector B 102 often changes, which requires frequent manual intervention on the input signal source of the selector A 101, troublesome to maintain

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  • Method and device for expansion leading out clock function in SDH equipment
  • Method and device for expansion leading out clock function in SDH equipment
  • Method and device for expansion leading out clock function in SDH equipment

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Embodiment Construction

[0042] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] The main idea of ​​the present invention is: first establish the mapping between the storage address OutA of the clock source of selector A and the storage address OutB of selector B, and then use the mapping address of the signal source corresponding to the system clock as the input of selector C One of the options, so that if the selector C selects this input option, the signal source of the derived clock is the same as the signal source of the system clock without manual intervention.

[0044] The invention discloses a basic implementation method of extending and deriving clocks in SDH equipment, such as figure 2 shown, including the following steps:

[0045] Step 201: Establish a mapping table between the storage address output by the first selector and the storage address output by the second selector.

[0046] During the...

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Abstract

The invention discloses a method for expanding and deriving the time clock function from SDH(synchronous digital hierarchy) equipment, which includes the steps that: a mapping table between the memory address output by a first selector and the memory address output by a second selector is established; when the clock source is derived, the corresponding memory address output by the first selector is searched for in the mapping table according to the memory address output by the second selector, and the memory address is used as the mapping address and is transmitted to a third selector; the third selector selects the signal source corresponding to the mapping address as the derived clock source. The invention also discloses a device for expanding and deriving the time clock function from the SDH equipment. The method and device provided by the invention guarantee that the derived signal source is the same as the signal source of the system clock without any manual intervention.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and a device for deriving a clock of SDH (Synchronous Digital Hierarchy) equipment. Background technique [0002] In SDH equipment, according to the needs of the equipment, sometimes it is necessary to export an external clock source to provide clocks for other equipment, such as PDH (Pseudo-Synchronous Digital Hierarchy) equipment, GSM (Global System for Mobile Communications) equipment, etc. According to the G.783 standard, the clock source used for export can be selected. At present, in the process of selecting according to the standard, in order to ensure the index of the exported clock source, the following two clock source export selection methods are generally adopted: [0003] 1. Select the system clock. [0004] Under normal circumstances, choose to directly export the system clock, which is simple and accurate. [0005] 2. Select the signal source corresponding to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06H04L7/00
Inventor 张萌
Owner ZTE CORP