Network Analysis Method for Wireless Delay Detection

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Solution Overview

Problem

In communication networks, especially wireless sections, monitoring delays without direct installation of monitoring devices is challenging due to the large number of wireless sections and difficult installation locations, making it hard to collect and analyze communication data effectively.

Innovation Solution

A network analysis method that receives packets from a wired network, extracts continuous packets and acknowledgement packets, and determines delays based on time intervals to identify if they are due to wireless communication issues, allowing for delay detection without direct monitoring of wireless sections, thereby reducing the need for multiple monitoring devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If monitoring devices are installed for each wireless section, then communication delay detection precision is improved, but device complexity and installation difficulty increase

Engineering Contradiction:

Improvecommunication delay detection precisionVSAvoidnumber of monitoring devices

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent introduces a wired network as an intermediary medium to indirectly monitor wireless communication quality. Instead of placing monitoring devices directly in wireless sections, the system captures packets transmitted through wired networks that carry wireless communication data, enabling delay detection without direct wireless section monitoring.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system captures copies of packets transmitted through the wired network that contain wireless communication data. By analyzing these packet copies (including acknowledgment packets and time interval information), the system can determine wireless communication delays without needing physical access to wireless sections.

Inventive Principle:

Principle #26Copying

2Device complexity

If monitoring devices are installed in limited locations, then device complexity is reduced, but measurement coverage and detection capability deteriorate

Engineering Contradiction:

Improvenumber of monitoring devicesVSAvoidcommunication delay detection capability

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent makes a single monitoring device capable of monitoring multiple wireless sections simultaneously by analyzing packets passing through the wired network. The monitoring device processes acknowledgment packets from various wireless communications that traverse the wired infrastructure, enabling one device to perform the function of multiple dedicated wireless monitors.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system shifts the monitoring dimension from direct wireless section monitoring to wired network packet analysis. By observing packets in the wired domain that carry wireless communication information, the system gains indirect access to multiple wireless sections without physically entering each wireless environment.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Measurement precision

If acknowledgment packet reception intervals are used to detect wireless delays, then measurement precision is improved, but difficulty of detecting and measuring increases

Engineering Contradiction:

Improvewireless delay determination accuracyVSAvoiddelay cause analysis complexity

Core Design Contradiction:

Measurement precisionVSDifficulty of detecting and measuring

Solution Approach 1:

The patent segments the delay analysis process into distinct components: measuring the time interval between acknowledgment packets, comparing it against a reference threshold, and making a binary determination of wireless delay presence. This segmentation simplifies the overall measurement difficulty by breaking down the complex delay analysis into manageable steps.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system uses acknowledgment packets from continuous data transmission as a partial sample to infer overall wireless communication quality. By analyzing a subset of acknowledgment packets during an active transmission session, the system can determine delay characteristics without needing to monitor every single packet or exhaustively analyze all transmission parameters.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS9253669B2Network analysis method, information processing device, and computer-readable recording medium

Publication Date: 2016.02.02 FUJITSU LTD

AI summary

A network analysis method performed by a computer, the network analysis method includes receiving packets from a wired network, extracting a plurality of continuous packets transmitted by a communication device, and a plurality of acknowledgement packets transmitted by a wireless communication device in response to the plurality of continuous packets, and determining whether a delay is due to a wireless communication between the wireless communication device and an access point, based on a time interval of the plurality of continuous packets, and a time interval of the plurality of acknowledgment packets.