Reconfigurable Fiber Node Switching Circuitry for Hybrid Networks
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Solution Overview
Problem
Conventional communication systems are power-hungry, slow, expensive, and inflexible, limiting their effectiveness in modern communication networks.
Innovation Solution
An advanced fiber node system with a digital optical interface and reconfigurable architecture, incorporating a passive optical network interface, switching circuitry, and DOCSIS MAC/PHY circuitry, which enables efficient communication between optical and electrical networks, and can function with or without a cable modem termination system, allowing for flexible deployment and management of DOCSIS gateways.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional communication systems are used, then system simplicity is maintained, but power consumption is high and speed is slow
Solution Approach 1:
The fiber node employs reconfigurable switching circuitry that can dynamically switch between different operational paths (first processing path with remote PHY, second processing path with remote MAC/PHY). This dynamic reconfiguration allows the system to adapt to different traffic conditions and optimize performance, achieving higher speeds while managing power consumption through selective path activation rather than always operating at maximum capacity.
Solution Approach 2:
The fiber node is designed with universal functionality to operate in multiple modes: it can function with a CMTS-equipped headend using remote PHY, or with a non-CMTS headend using remote MAC/PHY. This multi-functionality allows the same hardware infrastructure to serve different deployment scenarios, improving speed and efficiency without requiring separate dedicated systems for each mode.
2Adaptability or versatility
If conventional communication systems are used, then device complexity is low, but flexibility and adaptability are poor
Solution Approach 1:
The system segments communication functions into modular components: the fiber node contains switching circuitry with multiple processing paths, while CMTS functions can be located at the headend or distributed to remote locations. This segmentation allows flexible configuration where different combinations of centralized and distributed functions can be deployed based on specific network requirements, enhancing adaptability without proportionally increasing overall complexity.
Solution Approach 2:
The switching circuitry provides dynamic reconfiguration capability, allowing the system to adapt its architecture in real-time based on operational requirements. The node can switch between processing paths and operational modes dynamically, providing high configurability and adaptability while managing complexity through automated control rather than requiring complex manual configuration.
3Productivity
If conventional communication systems are used, then initial cost is low, but operational cost and maintenance expense are high
Solution Approach 1:
The fiber node incorporates automated switching and reconfiguration capabilities that enable self-management of network operations. The switching circuitry can automatically select appropriate processing paths based on current network conditions, reducing the need for manual intervention and lowering operational costs. The system serves itself by making intelligent routing decisions without requiring extensive human management overhead.
Solution Approach 2:
The system optimizes operational efficiency by dynamically changing operational parameters such as switching between different processing paths based on traffic demands. This parameter adjustment allows the network to operate more efficiently under varying conditions, improving productivity while reducing unnecessary energy consumption and operational costs associated with suboptimal configurations.
4Reliability
If CMTS equipment is deployed at headend, then network control capability is improved, but system cost and complexity increase
Solution Approach 1:
The system extracts CMTS functionality from the headend and places it at remote locations when appropriate. The fiber node can operate with remote MAC/PHY functions, effectively taking the CMTS capability out of the headend infrastructure. This extraction reduces headend complexity and cost while maintaining network control capability through distributed intelligence, allowing the same control functions to operate from different locations based on network needs.
Data Source
AI summary
Circuitry of a hybrid fiber-coaxial network may comprise a first transceiver configured to connect the circuitry to an optical link, a second transceiver configured to connect the circuitry to an electrical link, a first processing path, a second processing path, and a switching circuit. In a first configuration, the switching circuit may couple the first transceiver to the second transceiver via the first processing path. In a second configuration, the switching circuit may couple the first transceiver to the second transceiver via the second processing path. The first transceiver may comprise a passive optical network (PON) transceiver and the second transceiver may comprise a data over coaxial service interface specification (DOCSIS) physical layer transceiver. The switching circuit may be configured based on the type of headend to which the circuitry is connected.