Implementation method for GPON network to bear high-precision clock
A technology of high-precision clocks and implementation methods, which is applied in time-division multiplexing systems, electrical components, multiplexing communications, etc., and can solve system networking costs, installation and maintenance difficulties, high costs, and potential safety hazards in resource use, etc. question
Active Publication Date: 2020-04-10
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] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0047] as attached Figure 1-2 As shown, a method for implementing a GPON network carrying a high-precision clock includes the following steps:
[0048] Define the optical line terminal OLT and the optical network unit ONU as the 1588V2 boundary clock BC;
[0049] The OLT synchronizes with the upstream network element through the Slave port, and distributes the 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 invention provides a method for using the GPON network to carry a high-precision clock, so that the synchronization of the base station can reach the time synchroni...
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The invention discloses a method for realizing a GPON (Gigabit Passive Optical Network) bearing a high-precision clock. The method comprises the following steps: defining an OLT (Optical Line Terminal) and an ONU (Optical Network Unit) as a 1588V2 boundary clock BC; the OLT synchronizes with the upstream network element through a Slave port, and distributes time to the ONU equipment through a Master port; the ONU receives a time signal transmitted by the OLT through the Slave port and sends time to the base station through the Master port; and a PTP protocol of 1588V2 is transparently borne between the OLT and the ONU by utilizing a GEM frame. The invention provides a method for bearing a high-precision clock by using a GPON (Gigabit Passive Optical Network). The method comprises the following steps: enabling base station synchronization to reach tens of ns-level time synchronization; and the PTP message is transmitted by using the synchronous GEM frame, so that the high-precision synchronization of the GPON network transmission process is ensured in mechanism, Meanwhile, the system networking cost and the installation and maintenance difficulties caused by a GPS mode are avoided.
Description
technical field [0001] The invention relates to the field of high-precision clocks, in particular to a method for realizing a GPON network carrying a high-precision clock. Background technique [0002] In the traditional mobile application, all time synchronization adopts the way that the base station directly attaches the GPS receiver, and the receiver receives the time information provided by the GPS to realize the time synchronization of all the base stations. If each base station is installed 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 people, and there are potential safety hazards in resource use. [0003] In order to solve the above problems, the present invention provides a method for implementing a GPON network carrying a high-precision cl...
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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