A method for realizing high-precision clock carried by gpon network
A technology of high-precision clock and implementation method, applied in time division multiplexing systems, electrical components, multiplexing communications, etc., can solve the problems of maintenance difficulties, system networking costs, installation and maintenance difficulties, and high costs. The effect of ensuring high-precision synchronization, avoiding system networking costs and difficulties in installation and maintenance
Active Publication Date: 2021-05-25
广东邮电职业技术学院
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Problems solved by technology
If each base station is equipped with a GPS receiver, the cost is high and maintenance is difficult; the installation of the GPS receiving antenna must meet the 120-degree clearance requirement, which also brings difficulties to the installation and construction; in addition, GPS resources are controlled by others, and there are hidden dangers in the use of resources
[0003] In order to solve the above problems, the present invention provides a method for implementing a GPON network carrying a high-precision clock, realizing a high-precision time synchronization scheme for base station backhaul, and avoiding system networking costs and installation and maintenance difficulties brought about by GPS mode
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[0046] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0047] as attached Figure 1-2 Shown, a kind of GPON network bears the realization method of high precision clock, comprises the following steps:
[0048] Define the optical line terminal OLT and optical network unit ONU as 1588V2 boundary clock BC;
[0049] The OLT synchronizes with the upstream network element through the Slave port, and distributes time to the ONU device through the Master port;
[0050] The ONU receives the time signal transmitted by the OLT through the Slave port, and sends the time to the base station through the Master port;
[0051] The GEM frame is used to transparently carry the 1588V2 PTP protocol between the OLT and the ONU.
[0052] The present invention provides a method for using GPON network to carry a high-precision clock, so that base station synchronization can reach tens of ns-level time synchronization...
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The invention discloses a method for realizing a GPON network carrying a high-precision clock, comprising the following steps: defining an optical line terminal OLT and an optical network unit ONU as a 1588V2 boundary clock BC; The equipment distributes the time; the ONU receives the time signal transmitted by the OLT through the Slave port, and sends the time to the base station through the Master port; the GEM frame is used to transparently carry the 1588V2 PTP protocol between the OLT and the ONU. The present invention provides a method for using GPON network to carry a high-precision clock, so that base station synchronization can reach tens of ns-level time synchronization; and using synchronous GEM frames to transmit PTP messages ensures the high precision of the GPON network transmission process from the mechanism Synchronization, while avoiding the cost of system networking and the difficulty of installation and maintenance brought about by GPS mode.
Description
technical field [0001] The invention relates to the field of high-precision clocks, in particular to a method for implementing a GPON network carrying high-precision clocks. Background technique [0002] In traditional mobile applications, all time synchronization adopts the method of directly attaching GPS receiver to the base station, and the receiver receives the time information provided by GPS to realize the time synchronization of all base stations. If each base station is equipped with a GPS receiver, the cost is high and maintenance is difficult. The installation of the GPS receiving antenna must meet the 120-degree clearance requirement, which also brings difficulties to the installation and construction. In addition, GPS resources are controlled by others, and there are hidden dangers in the use of resources. [0003] In order to solve the above problems, the present invention provides a method for implementing a GPON network carrying a high-precision clock, realiz...
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IPC IPC(8): H04J3/06H04J3/16
CPCH04J3/0667H04J3/1652
Inventor 蒋燕李兵韩玉琪
Owner 广东邮电职业技术学院