Hub Control Circuit Power Saving via Downlink Link Status
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Solution Overview
Problem
Conventional hub power management is inefficient, requiring specific driver installations and relying on host terminal commands to enter power saving mode, leading to unnecessary power consumption.
Innovation Solution
A hub control method that monitors the link status of downlink ports to configure the uplink port as unrecognizable and power it off when no connections are established, eliminating the need for driver installations and host terminal commands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the hub remains in power saving mode to reduce power consumption, then power efficiency is improved, but the hub cannot respond to wake-up commands from the host terminal
Solution Approach 1:
The hub's operational state is segmented into different modes: full power mode when downlink ports are connected, and power saving mode when no downlink ports are connected. This segmentation allows the hub to optimize power consumption based on actual usage conditions while maintaining the ability to respond to wake-up commands when needed.
Solution Approach 2:
The hub dynamically transitions between power saving mode and full operational mode based on link status of downlink ports and wake-up commands from the host terminal. This dynamic state change allows the system to adapt power consumption levels to actual operational requirements, improving energy efficiency without sacrificing responsiveness when devices are connected.
2Reliability
If the uplink port remains active to respond to host terminal commands, then responsiveness is improved, but power consumption increases unnecessarily when no downlink devices are connected
Solution Approach 1:
The hub autonomously monitors the link status of its downlink ports and automatically transitions to power saving mode when no devices are connected, without requiring continuous commands from the host terminal. This self-service approach allows the hub to manage its own power state based on actual operational needs, reducing unnecessary power consumption while maintaining responsiveness when devices are present.
3Use of energy by moving object
If driver installation is required to enable power management, then power management control is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The hub implements autonomous power management by automatically monitoring downlink port connection status and transitioning to power saving mode without requiring driver installation or host terminal intervention. This self-service mechanism eliminates the complexity of driver configuration while maintaining effective power management, as the hub independently determines when to enter or exit power saving mode based on actual device connectivity.
Data Source
AI summary
A hub hub control method, wherein the hub possesses an uplink port and a plurality of downlink ports, includes: receiving link status of each downlink port to know whether each downlink port has built a link; and when none of the plurality of downlink ports has built a link, controlling the uplink port to be unable to build a link. A hub control circuit, the hub possessing an uplink port and a plurality of downlink ports, includes a link status reception unit and an uplink port control unit for respective execution of the two steps of the hub control method.