Fallback Master Node for 10SPE Wired LAN
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Solution Overview
Problem
The 10SPE network technology lacks a means to dynamically change a master node, leading to network failure if the master node fails, as it does not provide a method for fallback or replacement, causing traffic halt and network unavailability.
Innovation Solution
Implementing a physical layer (PHY) device with a microcontroller unit (MCU) and firmware that monitors beacon counters to detect master node failures, enabling a fallback master node to take over by restarting beacon transmissions and resynchronizing the network, allowing for seamless master node change without requiring intervention from the previous master node.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single master node is used in the 10SPE network, then network control is simplified and beacon transmission is centralized, but network reliability deteriorates because there is no fallback mechanism if the master node fails
Solution Approach 1:
The patent designates a fallback master node in advance before any failure occurs. This node is pre-configured with the capability to assume master responsibilities, including beacon transmission and network management functions. When the primary master node fails, the fallback node can immediately take over without requiring complex reconfiguration or election processes, thus resolving the contradiction by maintaining simple control structure while ensuring reliability through pre-prepared redundancy.
Solution Approach 2:
The fallback master node acts as an intermediary between the primary master node and the rest of the network. It monitors the health of the primary master node and stands ready to intervene if failure occurs. This intermediary mechanism provides a smooth transition path that maintains network stability and availability without complicating the overall control structure, as the fallback node integrates seamlessly into the existing master-slave architecture.
2Stability of the object's composition
If no master node change mechanism is implemented, then the network structure remains simple and stable, but adaptability deteriorates because the network cannot respond to master node failures
Solution Approach 1:
The patent introduces dynamic capability into the network by enabling the fallback master node to transition from a standby state to an active master state when needed. This dynamic behavior allows the network to adapt to failure conditions while maintaining structural simplicity. The fallback mechanism is activated only when necessary, preserving network stability during normal operation while providing adaptability when failures occur, thus resolving the contradiction between structural stability and failure response capability.
Data Source
AI summary
Various examples relate to a wired local area network (WLAN) including a shared transmission medium. An apparatus includes a beacon counter and an operational mode controller. The beacon counter is operably coupled to a line of a shared transmission medium of a wired local area network. The beacon counter is to count beacon signals on the line and determine a beacon count over a predetermined time period, or a beacon rate of the beacon signals. The operational mode controller is to control the apparatus to take over operation as a master node of the wired local area network based, at least in part, on a maximum bus cycle length of bus cycles on the line and responsive to the beacon count or the beacon rate.