Wireless Handover Between NFC and Wi-Fi Networks

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Solution Overview

Problem

Existing wireless communication systems face usability degradation and undefined operation when performing handovers between different communication methods like NFC and wireless LAN, particularly when a device connected to a network via wireless LAN is used for internet connectivity, leading to unintended disconnections.

Innovation Solution

A wireless communication system comprising a terminal apparatus and two wireless communication apparatuses, where one apparatus instructs the other to transmit participation information to participate in the network during a handover from short-distance NFC communication to wireless LAN communication, ensuring seamless connection and network participation without disconnecting from the internet.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a handover operation is performed from NFC to wireless LAN communication, then the communication distance is extended and network connectivity is improved, but the device may be unintentionally disconnected from the internet and usability is degraded

Engineering Contradiction:

Improvecommunication method switching capabilityVSAvoidusability during handover

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The system checks whether the wireless LAN section is currently connected to a network before performing the handover operation. This preliminary check prevents unintended disconnection from the internet by conditionally executing the handover only when appropriate, thereby maintaining usability while enabling communication method switching.

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If a handover operation is performed from NFC to wireless LAN communication, then the communication capability is enhanced, but the operation of the wireless section is not defined and system reliability is reduced

Engineering Contradiction:

Improvehandover operation capabilityVSAvoidoperation definition clarity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The system performs a preliminary check to determine the connection state of the wireless LAN section before executing the handover operation. This predefined operation sequence ensures that the handover is performed reliably and correctly, eliminating undefined behavior and improving system reliability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system provides feedback to the user regarding the connection state and handover status. This feedback mechanism ensures that users are informed about the current operation state, making the system behavior transparent and reliable.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS8761118B2Wireless communication system and wireless communication method to perform handover of communication using different communication systems

Publication Date: 2014.06.24 CASIO COMPUTER CO LTD

AI summary

Disclosed is that when the first wireless communication apparatus is connected to a terminal apparatus such as a wireless access point wirelessly, the second wireless communication apparatus performs the communication with the first wireless communication apparatus by a short distance wireless communication, then the first wireless communication apparatus transmits participation information to participate in the network to the second wireless communication apparatus by the short distance wireless communication, and the second wireless communication apparatus is connected to the network based on the received participation information so as to communicate with the first wireless communication apparatus through the terminal apparatus.