Wireless Access Point Backup Switching via Neighboring Wi-Fi

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Solution Overview

Problem

Conventional broadband service interruption solutions are costly and do not effectively provide backup connections for a wide range of services, especially when users move or switch broadband technologies, leading to prolonged downtime.

Innovation Solution

Utilizing the WLAN hardware of broadband access devices to detect and connect to neighboring wireless networks as a backup, leveraging existing WLAN chipsets to switch to client mode and establish a backup connection through software algorithms, including credential sharing and modified Wi-Fi Protected Setup protocols.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a wireless access point provides both Wi-Fi and cellular network connections simultaneously, then network redundancy and reliability are improved, but device complexity and operational difficulty increase

Engineering Contradiction:

Improvenetwork connection reliabilityVSAvoidaccess point configuration complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The access point automatically detects available cellular networks, performs authentication, and configures network settings without user intervention. The system self-manages the dual-network configuration, switching between Wi-Fi and cellular connections based on availability and quality, eliminating the need for manual setup while maintaining high reliability

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The access point is designed to perform multiple functions: it can operate as a traditional Wi-Fi access point, a cellular network interface, or both simultaneously. This multi-functionality allows a single device to provide redundant network paths through different technologies, improving reliability without requiring separate dedicated devices for each network type

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If automatic network switching is implemented, then user convenience is improved, but control over connection selection is reduced

Engineering Contradiction:

Improvenetwork switching convenienceVSAvoidconnection selection flexibility

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The access point dynamically adjusts its behavior based on real-time network conditions and user needs. It can automatically switch networks for optimal performance while also allowing users to override automatic switching when specific connection preferences are required. The system adapts its control mode between automatic and manual based on the situation

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system continuously monitors network quality, signal strength, and connection status of both Wi-Fi and cellular networks. Based on this feedback, it automatically determines the optimal network to use and switches accordingly. Users can also provide feedback through configuration settings to influence switching behavior, balancing automatic convenience with user control

Inventive Principle:

Principle #23Feedback

3Reliability

If multiple network interfaces are managed simultaneously, then network redundancy is improved, but power consumption increases

Engineering Contradiction:

Improvenetwork availabilityVSAvoidaccess point power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

Instead of continuously maintaining both Wi-Fi and cellular connections at full capacity, the access point periodically scans for available networks and activates the appropriate interface based on current needs. When one network is sufficient, the other interface enters a low-power state rather than remaining fully active, reducing overall power consumption while maintaining the ability to switch quickly if needed

Inventive Principle:

Principle #19Periodic action

Data Source

PatentEP3777294B1Wireless access point and method for providing backup network connections

Publication Date: 2026.04.29 INTERDIGITAL CE PATENT HOLDINGS SAS

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AI summary

At least one hardware processor (111) in a wireless access point (110) in a first local network (120) managed by the wireless access point (110) routes traffic between wireless devices (121, 122) in the first local network (120) and a second network via a first interface (113, 114) configured for communication with wireless devices (121, 122) in the first local network (120) and a second interface (115) configured for communication with the second network and, upon determination that communication via the second interface (115) is impossible, connects (S460) through a third interface (113, 114) to a second wireless access (130) point as a wireless device in a second local network (140) managed by the second wireless access point (130) and routes (S470) traffic between the wireless devices (121, 122) in the first local network (120) and the second network via the first interface (113, 114) and the third interface (113, 114). This way a back-up connection can be provided.