Wireless Network Device Fast Reconnection Bypassing AP Scan

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Solution Overview

Problem

Wireless network devices take a significant amount of time to re-establish a network connection after waking up from sleep mode, as they need to scan neighboring access points, which delays user access to the network.

Innovation Solution

The method involves storing network connection information before entering sleep mode and using this information to quickly re-establish a link upon waking, bypassing the need for scanning when the previous access point lacks security settings, thereby reducing connection time.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the wireless network device scans all neighboring access points to select one for establishing a link after waking from sleep mode, then the network connection can be reliably re-established, but the time required for re-establishment increases to 1-8 seconds

Engineering Contradiction:

Improvenetwork connection re-establishment reliabilityVSAvoidnetwork re-establishment time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by storing the BSSID (Basic Service Set Identifier) of the previously connected access point before the device enters sleep mode. When the device wakes up, it directly uses this pre-stored BSSID to quickly re-establish the connection without performing a full scan of all neighboring access points. This preliminary storage of connection information resolves the contradiction by enabling fast reconnection while maintaining reliability through targeted verification of the stored access point.

Inventive Principle:

Principle #10Preliminary action

2Loss of time

If the wireless network device directly uses stored connection information to re-establish a link without scanning access points, then the connection time is reduced to approximately 0.4 seconds, but the ability to detect changes in the network environment is reduced

Engineering Contradiction:

Improvenetwork re-establishment timeVSAvoidnetwork environment adaptability

Core Design Contradiction:

Loss of timeVSAdaptability or versatility

Solution Approach 1:

The patent implements feedback by verifying whether the previously connected access point (identified by stored BSSID) is still available and responsive after the device wakes from sleep mode. The system attempts to connect using the stored BSSID and receives confirmation or error feedback from the access point. This feedback mechanism ensures the device adapts to current network conditions while maintaining fast reconnection speeds, resolving the contradiction between speed and adaptability.

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP2538729B1Method for controlling network connection of wireless network device and associated wireless network device

Publication Date: 2018.08.29 ACER INC

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AI summary

A method for controlling a network connection of a wireless network device (100) includes: after the wireless network device (100) is woken up from a sleep mode: loading a wireless network driver (124); determining whether a predetermined access point satisfies a predetermined rule under a condition that the wireless network driver (124) does not scan access points; and when the predetermined access point satisfies the predetermined rule, the wireless network driver (124) directly utilizes pre-stored network connection information to connect to the predetermined access point without scanning the access points.