System and method for realizing clock synchronization among different units

A clock synchronization and inter-unit technology, which is applied in the field of communication, can solve problems such as the failure to realize the synchronization of the backup clock unit, the shutdown of the Ethernet port of the backup clock unit, and the inability to obtain Ethernet message messages, etc., to achieve high in-phase performance and ensure normal operation , The method is simple and reliable

Active Publication Date: 2011-09-14
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (2) For clock reference sources related to packet message transmission, the following problems will be encountered when implementing clock master and backup: usually, the Ethernet port of the backup clock unit is closed, and the Ethernet message message of the upper level cannot be obtained. Therefore, the synchronization of the standby clock unit cannot be realized; and for the reference source that needs to be configured with the transmission table, when the system is running normally, even if the Ethernet port of the standby clock unit is turned on, only the main clock unit can receive the transmission table. Configuration for message interaction, unable to achieve synchronization of the standby clock unit

Method used

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  • System and method for realizing clock synchronization among different units
  • System and method for realizing clock synchronization among different units
  • System and method for realizing clock synchronization among different units

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Embodiment 1

[0069] An embodiment of the present invention provides a system for realizing clock synchronization between different clock units, such as figure 2 As shown, the system includes at least a first unit and a second unit; in this embodiment, it is assumed that the first unit can obtain clock reference source information, and the second unit cannot obtain clock reference source information. At this time, the first unit Not only can the local clock synchronization be realized, but also a clock synchronization message can be transmitted to the second unit, so that the second unit can track and synchronize the first unit, or the second unit can track and synchronize the clock reference source obtained by the first unit.

[0070] Specifically, the first unit includes: a synchronization control module and a reference source message codec module;

[0071] The synchronization control module is used to acquire the clock reference source information, compose the clock reference source inf...

Embodiment 2

[0078] Considering that the reference source message encoding and decoding module sends and receives messages through the underlying transmission channel, there are currently some special application scenarios, and there are some hardware limitations for the reference source message encoding and decoding module. Refer to the source message encoding and decoding module It is impossible to realize the encoding processing and sending of synchronous messages such as time information.

[0079] In this regard, an embodiment of the present invention provides a system for realizing clock synchronization between different clock units, such as image 3 As shown, the system at least includes a first unit and a second unit; both of the first unit and the second unit include: a synchronization control module, a time information transfer module and a phase information codec module, that is, the embodiment of the present invention adopts the Setting the time information transfer module can r...

Embodiment 3

[0092] An embodiment of the present invention provides a system for realizing clock synchronization between different clock units, such as Figure 5 As shown, the system includes a first unit and a second unit; and the first unit and the second unit are respectively the master clock unit and the backup clock unit in the communication system, and their specific functions are the same as those of the first and second embodiments above. The same, will not be repeated here.

[0093] Further, when the first unit and the second unit are used as the main clock unit and the backup clock unit respectively, the system according to the embodiment of the present invention further includes: a system control unit;

[0094] The system control unit is used to control the power-on and power-off operations of the active clock unit and the standby clock unit. When performing active-standby switchover, it sends a master-to-standby message to the original master unit, sends a standby-to-master mes...

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Abstract

The invention discloses a system and a method for realizing clock synchronization among different units. The system comprises a first unit and a second unit. Each of the first and second units comprises a synchronization control module and a synchronization message transceiver module. The synchronization control module of the first unit is used for acquiring clock reference source information, forming a clock synchronization message by using the clock reference source information or the local clock-synchronized clock reference source information, and transmitting the clock synchronization message to the synchronization message transceiver module of the first unit. The synchronization message transceiver module of the first unit is used for transmitting the clock synchronization message to the second unit. The synchronization message transceiver module of the second unit is used for transmitting the clock synchronization message transmitted by the first unit to the synchronization control module of the second unit. The synchronization control module of the second unit is used for performing local clock synchronization according to the received clock synchronization message. The system provided by the invention can realize the clock synchronization between the different units, and solve the problems of difficulties in the clock synchronization realized in certain special application ways.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a system and method for realizing clock synchronization between different units. Background technique [0002] In a synchronous digital communication network, clock synchronization is an essential requirement, such as the synchronization between the BBU (Base Band Unit, baseband pool unit) and RRU (Remote Radio Unit, remote radio unit) of the wireless system, as well as the The synchronization between the main and standby clock units of a communication device, etc., where the main and standby clock units are defined as two clock units on one device, forming the main and standby. Under normal circumstances, the master clock unit provides timing synchronization signals for communication equipment. If the master clock unit fails, the backup clock unit immediately replaces the master clock to provide timing synchronization signals for communication devices. When a forced switc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/00
Inventor 罗丽傅小明
Owner ZTE CORP
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