PHY Port Status Synchronization via Service Interface Auto-Negotiation
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Solution Overview
Problem
Existing Ethernet systems require multiple MDIO interfaces for connecting PHY and MAC devices, leading to hardware resource consumption, complex signal connections, increased processing delays, and reduced communication reliability due to the need for additional management modules and channels.
Innovation Solution
A port status synchronization method that uses a service interface to connect PHY and MAC devices, allowing auto-negotiation and synchronization without an MDIO interface, thereby simplifying circuit design, reducing cabling needs, and eliminating the need for extra management channels and modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MDIO interfaces are used to connect PHY and MAC devices, then port status information can be transmitted and controlled, but hardware resources are consumed and space for backplane cabling is wasted
Solution Approach 1:
The patent extracts the management function from the traditional MDIO interface and integrates it into the service interface. The service interface originally used only for data transmission is now enhanced to carry both data and management information, eliminating the need for separate MDIO interfaces and reducing hardware resource consumption.
Solution Approach 2:
The service interface is given multi-functionality by enabling it to handle both data transmission and management information exchange. This universal interface approach allows a single interface to perform multiple functions, thereby reducing the total number of interfaces needed and simplifying the overall system architecture.
2Reliability
If MDIO interfaces are used to connect PHY and MAC devices, then port status information can be transmitted, but signal connection becomes complex and processing delay increases
Solution Approach 1:
The patent merges the management information channel with the data transmission channel by using the service interface for both purposes. This consolidation reduces the number of separate signal paths, simplifies connections, and decreases processing delay by eliminating redundant interface handling.
3Adaptability or versatility
If a system device management module independent of external processor is disposed, then management function is enhanced, but communication node increases and reliability reduces
Solution Approach 1:
The service interface performs self-service by handling both data transmission and management functions without requiring an independent management module. This self-sufficient approach reduces the number of communication nodes and eliminates the need for additional management infrastructure, thereby improving communication reliability.
Data Source
AI summary
A port status synchronization method, related device, and system, where a physical layer (PHY) device or an external processor connected to the PHY device determines whether a first service interface of the PHY device changes, and when the first service interface changes, controls a second service interface of the PHY device to restart auto-negotiation and sends, using the second service interface, an auto-negotiation advertisement packet to a first device connected to the second service interface in order to trigger the first device to synchronize, according to the auto-negotiation advertisement packet, a status of the second service interface and a status of the first service interface such that performing port status negotiation and synchronization between a link layer (media access control (MAC)) device or the first device and the PHY device using a service interface is achieved, without a need of disposing a management data input/output (MDIO) interface.