Ethernet Link Negotiation With Relaxed Timeout Parameters

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Solution Overview

Problem

Existing communication devices face interoperability challenges due to failure to comply with IEEE 802.3 Standard timeout values, design limitations, and challenging operating conditions, leading to repeated resetting and restarting of auto-negotiation and link training procedures.

Innovation Solution

Communication devices negotiate new parameter values, such as relaxed timeout values and adjusted default transmit amplitudes, during the auto-negotiation and link training process, allowing them to operate outside the strict mandates of the IEEE 802.3 Standard without requiring changes to the standard itself.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If communication devices strictly comply with IEEE 802.3 Standard mandated parameter values, then standard compatibility is maintained, but interoperability fails under challenging operating conditions and design limitations

Engineering Contradiction:

ImproveinteroperabilityVSAvoidparameter flexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent implements dynamic parameter adjustment by allowing communication devices to negotiate and modify timeout values and other link establishment parameters during the auto-negotiation process. Instead of using fixed mandated values, devices can adapt parameters based on actual operating conditions, channel characteristics, and device capabilities, thereby resolving the contradiction between reliability and adaptability

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent directly applies parameter changes by enabling devices to exchange and agree upon alternative parameter values (such as extended timeout values) that differ from IEEE 802.3 Standard mandates. This allows the system to optimize link establishment under challenging conditions while maintaining protocol compatibility through negotiated parameter sets

Inventive Principle:

Principle #35Parameter changes

2Reliability

If communication devices use relaxed parameter values during link establishment, then interoperability improves under varying conditions, but deviation from standard mandated values occurs

Engineering Contradiction:

Improvelink establishment successVSAvoidparameter compliance

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The system dynamically selects between standard-compliant and relaxed parameter values based on negotiation outcomes. Devices can transition from strict standard compliance to relaxed parameters when operating conditions warrant it, achieving both reliability improvement and conditional standard adherence through dynamic adaptation

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent enables parameter changes by implementing a negotiation mechanism where devices can agree upon alternative parameter values when standard mandated values are unsuitable. This maintains a form of compliance through mutual agreement while allowing necessary deviations for improved link establishment reliability

Inventive Principle:

Principle #35Parameter changes

3Reliability

If communication devices repeatedly reset and restart auto-negotiation procedures due to compliance failures, then standard adherence is maintained, but network performance deteriorates

Engineering Contradiction:

Improvestandard complianceVSAvoidnetwork performance

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent applies preliminary action by negotiating and agreeing upon appropriate parameter values (including relaxed timeout values) before link establishment begins. This prevents compliance failures during link establishment, eliminating the need for repeated resets and restarts, thereby maintaining both standard adherence and network performance

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The negotiation mechanism provides feedback between devices about their capabilities and operating conditions, allowing them to select parameter values that will succeed on the first attempt. This feedback loop prevents the repeated failures that would otherwise cause performance deterioration while maintaining standard compliance through negotiated agreements

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12532364B2Interoperability of communication devices

Publication Date: 2026.01.20 MARVELL ASIA PTE LTD

AI summary

In a communication network operating according to a communication protocol that defines a link establishment procedure having i) a negotiating procedure and ii) a training procedure, a first communication device performs the link establishment procedure with a second communication device. During the negotiating procedure, the first communication device negotiates one or more new parameter values for the link establishment procedure that are different than one or more mandated parameter values specified by the communication protocol. During the link establishment procedure, the first communication device uses the one or more new parameter values instead of using the one or more mandated parameter values specified by the communication protocol.