Removable Subscriber Downlink Modules for Selective Fiber Upgrades
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Solution Overview
Problem
Upgrading communication services in established subscriber distribution areas with legacy electrically conductive transmission media to higher data rates is costly and difficult due to the need for extensive infrastructure changes, such as digging up properties, which is not economically viable for all subscribers.
Innovation Solution
Implementing a system that allows for selective upgrading of transmission media by installing optical fiber terminals and network units in subscriber distribution areas, enabling individual subscribers to upgrade their services to fiber-to-the-premises (FTTP) while maintaining existing electrically conductive media for neighbors who do not require higher bandwidths, thus minimizing initial investment and disruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If optical fiber transmission media is installed to all subscriber premises in a newly developed area, then high data rate services (greater than 100 Mbps) can be delivered to all subscribers, but the infrastructure cost and complexity increase significantly
Solution Approach 1:
The patent segments the subscriber distribution area into multiple zones served by different network units. Each network unit manages a specific group of subscribers, allowing the system to provide high data rate services to only those subscribers who need them, rather than upgrading the entire infrastructure uniformly. This segmentation enables selective deployment of optical fiber where needed while maintaining legacy media for other subscribers.
2Device complexity
If legacy electrically conductive transmission media is used in established subscriber distribution areas, then infrastructure cost is reduced, but the data rate is limited to 100 Mbps or less
Solution Approach 1:
The patent implements a dynamic system where the transmission media type can be changed on an individual subscriber basis. The service provider can upgrade from electrically conductive media to optical fiber media for specific subscribers who request higher data rates, while maintaining the legacy media for other subscribers. This dynamic adaptability allows the infrastructure to evolve based on actual subscriber needs rather than requiring a complete upfront upgrade.
3Speed
If comprehensive infrastructure upgrade to FTTP is implemented in brownfield areas, then high data rate services are available to all subscribers, but the cost and disruption become economically unviable
Solution Approach 1:
The patent applies local quality by providing different transmission media types to different locations based on local subscriber needs. Instead of uniformly upgrading all subscriber lines to optical fiber, the system installs optical fiber only at premises where subscribers have ordered services requiring data rates greater than 100 Mbps. This localized approach to infrastructure quality enables high data rate services where needed while avoiding unnecessary upgrades elsewhere, making the brownfield upgrade economically viable.
Data Source
AI summary
An optical network unit (ONU) is installed to communicate with an optical line terminal (OLT) located at a remote terminal (RT). The ONU includes a first subscriber downlink interface to serve a first subscriber premises and a second subscriber downlink interface to serve a second subscriber premises. The RT is located apart from a central office (CO) and in communication with the CO. A first removably attachable subscriber downlink module is communicatively coupled to the first subscriber downlink interface. A second removably attachable subscriber downlink module is communicatively coupled to the second subscriber downlink interface. The first removably attachable subscriber downlink module is replaced with a third removably attachable subscriber downlink module. An optical transmission medium is connected between the third removably attachable subscriber downlink module and the first subscriber premises while retaining a second electrically conductive medium communicatively coupled to the second subscriber downlink interface.