Clock synchronization method and clock synchronization device
A technology of clock synchronization and clock synchronization, which is applied in the field of communication, can solve problems such as GPS and PTP conflicts, and achieve the effect of realizing the time synchronization of the entire network
Inactive Publication Date: 2014-03-19
ZTE CORP
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[0008] The purpose of the present invention is to provide a method and clock synchronization device for synchronizing clocks, which solves the problem of conflict between GPS and PTP, and realizes the PTP time synchronization of the whole network
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[0025] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.
[0026] see image 3 as shown in image 3 The invention provides a detailed implementation flow process when there is conflict between GPS and PTP on the device. Include the following steps:
[0027] Step 301: Perform PTP-related configuration on the nodes in the network according to the needs of the network;
[0028] Step 302: Calculate whether the port state is master, slave or passive port according to the PTP port state selection algorithm;
[0029] Step 303: Access and configure the GPS clock source;
[0030] Step 304: When there is GPS access on the detection device, whether there is also a Slave port of PTP, if yes, then go to step 305, if not, then go to step 306;
[0031] Step 305: discarding the received GPS message;
[0032] Step 306: Receive GPS message;
[0033] Step 307: Process the received GPS message to real...
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A method for synchronizing clocks and a clock synchronization device are provided in the present invention, wherein the method includes steps: states of all Precision Time Protocol (PTP) ports of the device to be synchronized are detected, and hereby a role of each said PTP port is determined; if there is a slave port in said each PTP port, the device to be synchronized only performs PTP clock synchronization with other devices. A clock synchronization device comprises a Global Position System (GPS) module and a PTP module, and also comprises a conflict detection module; the conflict detection module, connected with the PTP module and the GPS module, serves to detect the port role of all the PTP ports of the device when the PTP messages and the GPS messages are received / transmitted by the device synchronously; if there is a slave port, the conflict detection module informs the PTP module to perform the PTP clock synchronization with other devices. By setting a conflict detection mechanism, the present invention solves the problem of processing time synchronization when the GPS protocol messages and the PTP protocol messages synchronously exist on the device, and enables the time synchronization of the entire network.
Description
technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a clock synchronization method and a clock synchronization device. Background technique [0002] Ethernet is currently the most widely used network. With the development of the network, profound changes have taken place in its networking form, business type, and application occasions. In the process of Ethernet moving towards network integration, clock synchronization has also been raised. increasing demand. [0003] Among them, in the TD-SCDMA mobile network, not only frequency synchronization but also strict time synchronization are required between base stations. At present, GPS (Global Position System) is used to complete this requirement in the network, and the cost is relatively high; In the network, PTN equipment is used to carry the transmission of TD-SCDMA RAN services, and can support time-synchronized transmission. As an alternative to GPS, Ethernet...
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IPC IPC(8): H04L7/00H04L29/06
CPCH04J3/0644H04J3/085G06F1/12H04J3/0688
Inventor 宋雪雁
Owner ZTE CORP