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Clock synchronization method and system of multiport synchronization Ethernet equipment

A clock synchronization and Ethernet technology, applied in the field of synchronization, can solve problems such as no clock synchronization

Active Publication Date: 2008-10-29
ZTE CORP
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Problems solved by technology

Another example is the U.S. patent with the publication number US6178176. Although the repeaters in the network are synchronized through a stackable bus, it is impossible to synchronize the clocks of multi-port synchronous Ethernet devices.
[0004] In summary, there is no method for synchronizing the clocks of multi-port synchronous Ethernet devices in the prior art

Method used

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  • Clock synchronization method and system of multiport synchronization Ethernet equipment
  • Clock synchronization method and system of multiport synchronization Ethernet equipment
  • Clock synchronization method and system of multiport synchronization Ethernet equipment

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Embodiment Construction

[0056] The specific implementation of the present invention will be described in further detail below in conjunction with the accompanying drawings. For the convenience of description, in the following description, the multi-port synchronous Ethernet device is simply referred to as a device. Boards are used instead of printed circuit boards.

[0057] The hierarchical structure of multi-port synchronous Ethernet equipment of the present invention is as figure 1 As shown, the device is at the highest level, and there are multiple different boards on the device, and the boards are one level lower than the device, and there are multiple different ports on the board, and the end is one level lower than the board. The synchronous Ethernet transmits the data to the board through the port, and the board transmits the data to the device, uploading level by level.

[0058] Based on the hierarchical structure of the above-mentioned multi-port synchronous Ethernet equipment, the basic i...

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Abstract

The invention discloses a clock synchronization method for a multiport synchronization Ethernet device, which comprises the following steps: slave ports and master ports are determined according to the clock resumed from each port and real time clock (RTC) of boards is used for synchronizing the RTC of each master port on the boards after using the clock of the slave ports to synchronize the clock of the boards; slave boards and master boards are determined according to the RTC of each board and the clock of the slave boards is used for synchronizing the RTC of the device and the RTC of the device is transmitted to the boards; the boards synchronize the RTC of the boards according to the RTC of the device and the RTC of the boards after the synchronization is used for synchronizing the clock of each port on the boards. Meanwhile, the invention discloses a clock synchronization system of the multiport synchronization Ethernet device, which comprises a port clock resuming unit, a board level CPU, a board level clock management unit, a device level CPU and a device level clock management unit. The utilization of the invention can realize the synchronization of all clocks of the multiport synchronization Ethernet device.

Description

technical field [0001] The invention relates to synchronization technology, in particular to a clock synchronization method and system for multi-port synchronous Ethernet equipment. Background technique [0002] With the development of data communication technology, especially the emergence of high-bandwidth and high-speed data communication technology, the use of synchronous Ethernet to transmit voice signals is increasing, and thus multi-port synchronous Ethernet equipment has appeared. There are multiple boards, and each board has multiple ports. Due to the increasing requirements for time accuracy, the multi-port synchronous Ethernet device needs to achieve the overall time synchronization of the device. [0003] At present, there are many patents for synchronizing clocks, but there are not many patents based on internal synchronization of devices. For example, the invention patent with the publication number CN200410065340 is specially used in the program-controlled ex...

Claims

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Application Information

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IPC IPC(8): H04L7/033H04L12/28
Inventor 刘一远
Owner ZTE CORP
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