NFC Handover Service Selection via Preliminary Request Message
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Solution Overview
Problem
Conventional techniques for handover in short range wireless communications, such as NFC, do not effectively notify the communication partner device of the state of the user device, leading to inadequate selection of services during the handover process.
Innovation Solution
A communication device that includes a first communication unit for NFC, a second communication unit for a higher-speed wireless LAN, a transmission unit to send a request message indicating undetermined communication processing, and a selection unit to choose services based on the received response message, allowing for appropriate service execution after handover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the communication device establishes connection without determining communication processing beforehand, then the connection establishment is simplified and faster, but the service selection accuracy deteriorates
Solution Approach 1:
The communication device transmits a request message before establishing the communication connection, indicating that communication processing is not determined yet. This preliminary action allows the partner device to prepare capability information in advance, so that when the connection is established, the service selection can be made accurately based on pre-exchanged information about executable services and communication capabilities.
2Measurement precision
If the device notifies the partner device of its state during handover, then the service selection becomes more accurate, but the communication protocol complexity increases
Solution Approach 1:
A request message is introduced as an intermediary communication element during the handover process. This message carries state information about the communication device (indicating whether communication processing is determined) and triggers the partner device to transmit capability information. The request message acts as a mediator that enables accurate service selection without requiring complex direct negotiations between devices.
3Measurement precision
If capability information is exchanged through NFC during handover, then the service selection is more accurate, but the communication speed is reduced
Solution Approach 1:
The capability information exchange process is segmented into two stages: first, a request message is transmitted through NFC to indicate the need for capability information; second, the actual capability information is exchanged through the higher-speed wireless communication channel after the connection is established. This segmentation allows accurate service selection while minimizing the use of slow NFC communication.
Data Source
AI summary
A communication device transmits, using a wireless communication through a first communication scheme, a first request message requesting connection by the second communication scheme to another communication device, which includes information indicating that communication processing to be requested to the another communication device has not been determined, receives, using a wireless communication through the first communication scheme, a first response message including information indicating whether the connection can be established by the second communication unit and information indicating communication processing executable by the another communication device using a wireless communication through the second communication scheme, and selects communication processing to be executed using the wireless communication through the second communication scheme based on the information which is included in the received first response message and information about the communication processing by the another communication device using the wireless communication through the second communication scheme.