Communication Path Switching Detection via Arrival Time Analysis

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Solution Overview

Problem

There is a need for a technology that can easily identify when a communication path switchover is occurring in a communication network.

Innovation Solution

An analysis device equipped with a characteristic information specifying means that determines the characteristic information of communication paths by analyzing the difference in arrival times of communication packets between connected communication devices, allowing for the identification of communication path switching.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If communication path switching is performed by the telecommunication provider, then communication reliability is maintained through redundancy, but communication path identification becomes difficult without additional markers

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidcommunication path identification

Core Design Contradiction:

ReliabilityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent extracts and analyzes specific characteristics (arrival time differences) from communication packets to identify communication paths. By taking out and examining the timing characteristics of packets, the system can distinguish between different communication paths without requiring additional identification markers in the packet data itself.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent uses parameter changes in arrival times as indicators of communication path switching. By monitoring changes in the arrival time parameter of communication packets, the system can detect when switching between different communication paths occurs, enabling identification without modifying the communication packets.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If RTT measurement samples are increased to improve measurement precision, then communication path identification accuracy improves, but communication overhead and processing time increase

Engineering Contradiction:

Improvecommunication path identification accuracyVSAvoidprocessing time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent replaces complex statistical analysis methods with a simpler differential equation-based model. Instead of analyzing large numbers of RTT samples using complex statistics, the system uses a differential equation to model arrival time changes, achieving accurate communication path identification with fewer samples and reduced processing time.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS20250184253A1Analysis device, analysis method, and storage medium

Publication Date: 2025.06.05 NEC CORP

AI summary

An analysis device includes at least one memory configured to store instructions, and at least one processor configured to execute the instructions to calculate, based on the difference in arrival times of communication packets between a first communication device and a second communication device connected via a communication network, characteristic information on the arrival time of each of the different communication paths in the communication network.