Communication Apparatus Using NFC and Wi-Fi Direct for Data Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication systems lack efficient methods for wireless communication between devices without relying on access points, particularly in scenarios where direct and secure data transfer is required, such as between a printer and a portable terminal.
Innovation Solution
A communication system utilizing a printer with both Wi-Fi Direct (WFD) and Near Field Communication (NFC) interfaces, where the printer functions as a Group Owner in the WFD network, enabling secure and efficient data transfer by sending network identification information and target data directly between devices using NFC and WFD standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If NFC is used for wireless communication between devices, then short-range secure data transfer is achieved, but communication distance is limited and data transfer speed is slow
Solution Approach 1:
The wireless communication process is segmented into two distinct phases: first, NFC interface establishes secure connection and transmits network identification information over short distance; second, WFD interface takes over for high-speed data transfer over longer distances. This segmentation allows each interface to operate in its optimal performance range.
Solution Approach 2:
Network identification information transmitted via NFC acts as an intermediary that enables the transition from NFC to WFD communication. The NFC interface mediates the initial connection establishment, which then facilitates the higher-performance WFD communication mode.
2Adaptability or versatility
If access point is used for wireless communication, then infrastructure-based connectivity is provided, but system complexity and cost increase
Solution Approach 1:
The patent extracts the essential wireless connectivity function from the access point infrastructure and implements it directly between devices using WFD technology. This eliminates the need for external access points, base stations, or routers, thereby reducing system complexity while maintaining wireless adaptability.
Solution Approach 2:
Devices perform wireless communication autonomously using direct WFD connections without requiring external infrastructure services. The system serves itself by establishing peer-to-peer communication channels, eliminating dependency on access points or network administrators.
3Speed
If WFD is used for direct wireless communication, then communication distance and data transfer speed are improved, but secure connection establishment becomes more complex
Solution Approach 1:
Secure connection establishment is simplified by performing preliminary authentication and network parameter exchange through the NFC interface before initiating WFD communication. This preliminary action through NFC reduces the complexity of secure connection setup for the subsequent high-speed WFD data transfer.
Data Source
AI summary
A first communication apparatus may comprise a first type of interface configured to function as an IC tag, a second type of interface, and a controller. The controller may cause the first type of interface to execute a sending operation. The sending operation may be executed by using a first wireless connection established between the first and second communication apparatuses. The sending operation may include an operation of the first type of interface to send network identification information to the second communication apparatus. The network identification information may be information to be used in a first wireless network to which both the first and second communication apparatuses belong. The controller may execute, after the first type of interface has executed the sending operation, a wireless communication of target data with the second communication apparatus via the second type of interface by using the first wireless network.