Method and device for compensating system time

A technology for system time and compensation equipment, applied in the field of communication, can solve the problems of inability to compensate the system time of 1588 equipment, and inability to measure the difference between system time and system time by a time comprehensive tester.

Active Publication Date: 2014-01-29
RAISECOM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The embodiment of the present invention provides a system time compensation method and device to solve the problem in the prior art that for 1588 devices that cannot output PPS signals, it is impossible to measure the system time of the 1588 device and GPS by using a time comprehensive tester. The difference of system time makes it impossible to compensate the system time of the 1588 device

Method used

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  • Method and device for compensating system time
  • Method and device for compensating system time
  • Method and device for compensating system time

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Embodiment 1

[0030] Such as figure 2 As shown, it is a schematic diagram of the steps of the system time compensation method in Embodiment 1 of the present invention. The method mainly includes the following steps:

[0031] Step 101: The slave clock device receives the first message sent by the first master clock device through the first link, obtains the sending time T1 of the first message from the first message, and determines the receiving time of the first message T2.

[0032] The concrete realization mode of this step 101 can be:

[0033] The first master clock device sends a synchronous SYNC message to the slave clock device through the first link at time T1, and the SYNC message arrives at the slave clock device at time T2 after being transmitted through the first link. Wherein, the T1 time is specifically a time stamp, indicating the time when the first master clock device sends the SYNC message, which corresponds to the system time of the first master clock device, and the fir...

Embodiment 2

[0070] The second embodiment is a system time compensation device belonging to the same inventive concept as the first embodiment, such as Figure 5 As shown, the device includes: a first time determination module 11, a first time difference determination module 12, a compensation module 13, a second time determination module 14, a second time difference determination module 15 and a difference value determination module 16, wherein:

[0071] The first time determining module 11 is configured to determine the receiving time of the first message sent by the first master clock device received through the first link, the sending time of the first message included in the first message, the The system time compensation device sends the sending time of the second message to the first master clock device through the second link, and the receiving time of receiving the second message by the first master clock device.

[0072] The first time difference determining module 12 is used to ...

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Abstract

The invention discloses a method and a device for compensating system time. The method specifically includes that difference value of transmission delay produced by a first link and transmission delay produced by a second link is determined according to a second time difference of system time of a subordinate clock device and system time of a second principal clock device, so that a first time difference of current system time of the subordinate clock device and system time of a first principal clock device is determined according to the determined difference value, the system time of the subordinate clock device can be compensated when the subordinate clock device fails to output PPS (pulse per second)signals.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to a system time compensation method and equipment. Background technique [0002] With the rapid development of mobile communication network technologies, more and more attention has been paid to the clock synchronization capability of mobile backhaul networks based on Packet Transport Network (PTN) technology. Specifically, the clock synchronization capability of the PTN is mainly reflected in two aspects: First, the PTN can carry Time-Division Multiplexing (TDM) services and provide a mechanism for TDM service clock recovery, so that the TDM service data flow Finally, it can also be synchronized with the service data flow at the sending end; second, PTN can provide a high-precision network reference clock like a TDM network to meet the synchronization requirements of network nodes or terminals. At present, the protocol for clock synchronization mainly includes the IEEE (In...

Claims

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Application Information

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IPC IPC(8): H04L7/00H04L12/26H04J3/06
Inventor 迟蕾
Owner RAISECOM TECH
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