Dual PON Interface OLT for Remote Area Broadband Access
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Solution Overview
Problem
Conventional passive optical network (PON) technologies are inadequate for deploying broadband services in remote areas, as they require extensive transmission media and high networking costs due to the need for point-to-point Ethernet connections between optical line terminals and network side devices.
Innovation Solution
The implementation of an optical line terminal with dual PON interfaces that support different or the same protocols, enabling protocol conversion and signal processing to facilitate point-to-multipoint transmission, reducing the need for multiple transmission media and lowering costs by using optical splitters for multi-level splitting, thereby extending broadband services to remote areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional PON networking mode with OLT in central office is used, then network architecture is simple, but remote area broadband access is not supported
Solution Approach 1:
The patent segments the traditional centralized OLT architecture into distributed OLT units that can be deployed at multiple locations (central office and remote areas). This segmentation enables remote area broadband access while maintaining manageable network complexity through modular deployment.
Solution Approach 2:
The patent extends the network architecture from a single centralized dimension to multiple spatial dimensions by deploying OLT units at different locations (central office and remote areas). This dimensional expansion enables remote area access without proportionally increasing overall system complexity.
2Reliability
If point-to-point Ethernet connections are used between OLT and network side devices, then connection reliability is high, but transmission media consumption and networking costs increase
Solution Approach 1:
The patent merges multiple point-to-point connections into a shared point-to-multipoint Ethernet connection architecture. Multiple OLT units and network side devices share common transmission media through the same Ethernet interface, reducing overall media consumption while maintaining connection reliability through protocol-level management.
Solution Approach 2:
The Ethernet interface is designed with multi-functionality to support both traditional point-to-point connections and the new point-to-multipoint connections. This universal interface maintains reliability characteristics while enabling efficient media utilization across different connection types.
3Adaptability or versatility
If multiple OLT devices are deployed in remote areas, then broadband access coverage is improved, but transmission media requirements and networking costs increase
Solution Approach 1:
The patent combines multiple OLT devices into a point-to-multipoint Ethernet connection where multiple OLTs share common transmission media. This merging approach enables expanded broadband coverage while reducing networking costs by eliminating redundant dedicated connections for each OLT unit.
Solution Approach 2:
The patent uses virtualization to create virtual copies of OLT functions that can be deployed remotely without requiring physical duplication of complete OLT systems. This reduces manufacturing and deployment costs while maintaining service coverage capabilities.
Data Source
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AI summary
This application discloses a communications network and a related device. The communications network includes a first optical line terminal, a second optical line terminal, and customer-premises equipment. The second optical line terminal may be connected to a first optical line terminal at an upper layer through a PON interface, and may be further connected to customer-premises equipment at a lower layer through a PON interface. The communications network in this application enables a user in a remote area to access a broadband service. In addition, the PON interface features point-to-multipoint transmission, and therefore transmission media can be saved and networking costs can be reduced.