Determination Device Burst Error Suppression in Packet Networks

Solution Overview

Problem

Conventional packet networks discard frames with errors, leading to burst errors when transmitting digital hierarchy signals, and existing solutions fail to handle frames from general devices without specific error flags.

Innovation Solution

A determination device and method that identify specific frames, detect errors, discard non-specific frames with errors, and rewrite error detection codes for specific frames based on current frame states, preventing burst errors during transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If error detection is performed in each relay device and frames with errors are discarded, then data reliability is improved, but burst error generation increases and transmission efficiency deteriorates

Engineering Contradiction:

Improvedata reliabilityVSAvoidtransmission efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent applies local quality by differentiating the error handling approach based on frame type. Specific frames (e.g., video frames requiring real-time transmission) are treated differently from general frames. For specific frames, error detection is performed but the frame is not discarded even if errors are detected, allowing real-time data to pass through while maintaining reliability for other data types.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent inverts the conventional error handling approach. Instead of discarding frames with errors as is conventional, the patent selectively retains specific frames with errors for real-time transmission. The determination unit identifies specific frames and the rewriting unit rewrites error detection codes to prevent false rejection, thereby inverting the standard error-discarding behavior.

Inventive Principle:

Principle #13The other way round (Inversion)

2Loss of energy

If frames with errors are discarded to prevent band consumption, then network resource efficiency is improved, but burst errors are generated causing data loss

Engineering Contradiction:

Improvenetwork resource efficiencyVSAvoidburst error generation

Core Design Contradiction:

Loss of energyVSObject-generated harmful factors

Solution Approach 1:

The patent applies local quality by differentiating the error handling approach based on frame type. Specific frames (e.g., video frames requiring real-time transmission) are treated differently from general frames. For specific frames, error detection is performed but the frame is not discarded even if errors are detected, allowing real-time data to pass through while maintaining reliability for other data types.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent converts the harmful effect of error detection into a beneficial mechanism. By rewriting the error detection code for specific frames, the system transforms what would be a rejection signal into a transmission permission signal. The error detection mechanism itself becomes the basis for allowing real-time data transmission, turning a potential harm into a benefit.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Reliability

If conventional error detection is applied to all frames, then network reliability is improved, but real-time data transmission is blocked

Engineering Contradiction:

Improvenetwork reliabilityVSAvoidreal-time transmission speed

Core Design Contradiction:

ReliabilityVSSpeed

Solution Approach 1:

The patent applies local quality by differentiating the error handling approach based on frame type. Specific frames (e.g., video frames requiring real-time transmission) are treated differently from general frames. For specific frames, error detection is performed but the frame is not discarded even if errors are detected, allowing real-time data to pass through while maintaining reliability for other data types.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent introduces dynamics by making the error handling policy adjustable based on frame characteristics. The determination unit dynamically identifies specific frames requiring real-time transmission and applies different error handling rules to them compared to general frames. This dynamic adaptation allows the system to optimize between reliability and real-time transmission speed based on actual traffic conditions.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentEP2515462B1Determination device, transfer device, determination method, computer program

Publication Date: 2019.06.12 NEC CORP

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AI summary

A determination device includes a determination unit which determines whether a received frame is a prescribed specific frame, an error detection unit which detects an error for the frame, a discard unit which discards a frame from which the error has been detected and that is not the specific frame, and a rewriting unit which rewrites a code for detection of an error for the specific frame based on a current frame state.