A time synchronization method based on clock information and node equipment
A technology of node equipment and clock information, applied in the field of communication, can solve problems such as imperfection, failure to reflect clock synchronization performance, and influence on the overall performance of the time synchronization network, and achieve the effect of accurate reflection
Active Publication Date: 2017-03-29
CHINA MOBILE COMM GRP CO LTD
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Problems solved by technology
[0005] In the existing scheme where node devices implement time synchronization based on clock synchronization, the performance of time synchronization is affected by clock synchronization. If the system clock is inaccurate, the accuracy of time synchronization will also decrease
However, since clock synchronization and time synchronization run independently, the degradation of clock synchronization performance is not reflected in time synchronization processing, which is very likely to cause imperfections and errors in time synchronization source selection, switching, and alarm processing. Affects the overall performance of the time synchronization network
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[0013] Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
[0014] figure 1 It is a time synchronization method 1000 based on clock information according to an embodiment of the present invention. like figure 1 As shown, in step S110, the node device receives information. For example, a node device may receive information using either interface.
[0015] In step S120, the node device extracts clock information and time information from the received information. For example, when the node device implements clock synchronization based on Layer 2 synchronous Ethernet, it can extract the clock state SSM information. When the node clock implements time synchronization based on packet PTP, information such as time source ID, time quality level, and time transmission hops can be extracted.
[0016] In step S130, the node device selects a clock source according to the extracted clock information, and selects a tim...
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The application discloses a method for time synchronization based on clock information and node equipment. The method comprises the following steps: receiving information by the node equipment; extracting the clock information and time information from the received information; selecting a clock source according to the extracted clock information, and selecting a time source according to the extracted time information; carrying out synchronization processing by a system clock of the node equipment according to the information of the selected clock source and the information of the time source; using the time grade of the time source as a time information output state grade of the node equipment; regulating the time information output state grade according to the information of the clock source. Through the implementing mode of the application, the time output state of the node equipment can be accurately reflected.
Description
technical field [0001] The present application relates to the communication field, and in particular to a clock information-based time synchronization method and node equipment. Background technique [0002] With the development of mobile communication technology, systems such as TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) and CDMA2000 all have high-precision time synchronization requirements. In the prior art, a global positioning system (GPS) module can be added to each base station to solve the problem of base station time synchronization. Time information can also be transmitted between transmission devices through the time transfer protocol, and a time synchronization network can be established to provide time information for the base station. Mobile communication base stations also have clock synchronization requirements. Therefore, in addition to the time synchronization network, the transmission network also carries out clock transmission to f...
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IPC IPC(8): H04W56/00
Inventor 韩柳燕
Owner CHINA MOBILE COMM GRP CO LTD