NFC Service Discovery via LLCP PDU Exchange
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Solution Overview
Problem
Existing Near Field Communication (NFC) networks are inefficient in establishing communication links between devices due to service mismatches, which result in user inconvenience and time-consuming processes, as users are only notified of service mismatches at the end of the communication attempt.
Innovation Solution
A method and device for establishing a communication link in an NFC network by sending a discovery request and receiving a discovery response to identify and match services registered in other devices, using Logical Link Control Protocol (LLCP) data units, enabling the setup of a logical link control protocol link based on the discovery response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If service matching is performed at the end of the communication attempt, then communication reliability is improved by ensuring service compatibility, but communication time increases and user convenience deteriorates
Solution Approach 1:
The patent applies preliminary action by performing service discovery and matching before the communication attempt is fully established. The system exchanges service capability information in advance during the connection setup phase, allowing both devices to determine service compatibility before committing to the communication session, thus avoiding time-wasting failed connection attempts.
Solution Approach 2:
The patent implements feedback mechanisms where devices exchange service capability information and matching results during the connection setup process. The system provides intermediate feedback about service compatibility status, allowing devices to adjust their communication strategy based on the matching outcome, thereby improving both reliability and efficiency.
2Productivity
If service discovery is performed early in the communication process, then communication time is reduced and efficiency is improved, but the complexity of the protocol increases
Solution Approach 1:
The patent applies universality by designing a multi-functional service discovery mechanism that operates within the existing NFC communication framework. The same communication channels and protocols used for data transmission are also utilized for service discovery and matching, eliminating the need for separate dedicated discovery protocols and thereby avoiding excessive complexity while maintaining high efficiency.
3Ease of operation
If automatic service matching is implemented, then user convenience is improved and operation is simplified, but the extent of automation increases system complexity
Solution Approach 1:
The patent implements self-service by enabling devices to automatically perform service discovery, capability matching, and connection establishment without requiring user intervention. The system autonomously exchanges service information, determines compatibility, and initiates communication based on matching results, thereby greatly improving user convenience while managing automation complexity through standardized protocols.
Data Source
AI summary
A method and an electronic device are provided for establishing, at a first electronic device, a communication link between the first electronic device and a second electronic device in a Near Field Communication (NFC) network. The method includes sending, to the second electronic device, a discovery request for discovery of one or more services registered in the second electronic device; receiving, from the second electronic device, a discovery response including a parameter list for the one or more services registered in the second electronic device; and establishing a logical link control protocol (LLCP) link between the first electronic device and the second electronic device based on the discovery response. Each of the discovery request and the discovery response is formed in a logical link control (LLC) protocol data unit (PDU).