NFC Service Negotiation Protocol for Wireless Handover
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Solution Overview
Problem
Existing NFC technologies only allow unidirectional transmission of information for WiFi/Bluetooth connectivity and do not enable users to determine the services supported by a counterpart device after connection, leading to unnecessary resource usage when the desired service is not available.
Innovation Solution
A method and device for service negotiation using NFC, which allows for bidirectional exchange of service-related information through a data structure that includes service records, enabling devices to determine and execute services after connection, and automatically activate communication modules as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If NFC is used to exchange connectivity information for WiFi/Bluetooth connection, then connection establishment is enabled, but service execution information cannot be exchanged and users must manually execute services after connection
Solution Approach 1:
The patent applies preliminary action by including service execution information in the handover request/selection messages exchanged during NFC connectivity establishment. This allows service execution to be pre-configured and automatically triggered after connection, eliminating the need for manual user intervention. The service information is prepared and transmitted in advance along with connectivity details.
2Speed
If connection is established without determining service availability, then connection speed is improved, but unnecessary resource usage occurs when desired service is not available
Solution Approach 1:
The patent implements feedback by incorporating service availability information exchange into the handover protocol. Devices provide feedback about supported services during the NFC-mediated connection establishment process. This allows the initiating device to determine service availability before fully establishing the connection, enabling it to avoid activating communication modules and resources when the desired service is not available at the counterpart device.
3Device complexity
If only connectivity information is exchanged through NFC, then communication protocol simplicity is maintained, but service negotiation capability is lost
Solution Approach 1:
The patent applies universality by designing the handover request and selection messages to serve multiple functions simultaneously. These messages not only establish connectivity between devices but also negotiate and convey service execution information. The existing NFC handover protocol is extended to handle both connection establishment and service negotiation, making the protocol multi-functional without requiring entirely separate communication channels.
Data Source
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AI summary
A method and an electronic device for service negotiation are provided. The method includes sensing, by the electronic device, a counterpart device through a first protocol, transmitting a request message to the counterpart device through the first protocol, the request message including indication information indicating that the electronic device requests a first service and first service information regarding the first service, and connecting with the counterpart device through a second protocol, when a selection message including indication information selecting the first service is received from the counterpart device through the first protocol, and, after connecting through the second protocol, executing the first service with the counterpart device using the first service information. The request message and the selection message each includes connection information for a connection using the second protocol, and the electronic device and the counterpart device use the connection information to perform the connection using the second protocol.