Unicast Connection Exception Handling for MAC and Security Mismatches
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Solution Overview
Problem
Unicast connection establishment is affected by MAC address conflicts and security mechanism mismatches between communication parties, leading to disordered interactions and impaired service execution in internet of vehicles communication.
Innovation Solution
A method and apparatus that utilize a first device to receive a message requesting a unicast connection, identify abnormalities based on MAC addresses and security mechanisms, and send a response message carrying error identifiers to resolve conflicts and mismatches, enhancing connection efficiency and service execution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MAC address randomization is used to avoid conflicts, then device security is improved, but connection establishment reliability deteriorates due to conflicts between different devices using the same temporary MAC address
Solution Approach 1:
The patent introduces a third device (access point or network controller) as an intermediary to manage and allocate temporary MAC addresses. This mediator maintains a mapping between permanent device identifiers and temporary MAC addresses, ensuring unique allocation and resolving the conflict issue while preserving the security benefits of MAC address randomization
Solution Approach 2:
The patent creates a mapping copy between permanent device identifiers and temporary MAC addresses. The third device maintains this identifier-MAC mapping table, allowing it to allocate unique temporary MAC addresses to different devices and track their usage, thereby preventing conflicts while enabling anonymous communication
2Speed
If unicast connection establishment procedures are simplified, then connection speed is improved, but the ability to handle security mechanism mismatches and errors deteriorates
Solution Approach 1:
The patent performs preliminary security mechanism matching and validation during the connection establishment process. The third device pre-checks compatibility between communication parties' security mechanisms before final connection setup, and prepares error handling responses in advance, allowing fast connection establishment without sacrificing error handling capability
Solution Approach 2:
The patent implements a feedback mechanism where the third device monitors connection establishment attempts and provides error information back to the communicating parties. When security mechanism mismatches or errors occur, the system receives feedback about the specific error type and can adjust accordingly, maintaining adaptability while preserving speed through efficient error communication
Data Source
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AI summary
This application discloses a method and an apparatus for handling a unicast connection establishment abnormality. The method includes: A second device sends a first message to a first device to request the first device to establish a unicast connection to the second device. The first message carries a medium access control MAC address, an address identifier, and a security mechanism of the second device. The first device determines, based on the first message, that establishment of the unicast connection between the first device and the second device is abnormal, and sends a second message to the second device. The second message carries the MAC address, the address identifier, and an error identifier of the second device, so that the second device performs corresponding handling based on a reason why establishment of the unicast connection is abnormal that is indicated by the error identifier. According to this application, the second device can be quickly identified based on the MAC address and the address identifier of the device in the message, and the error identifier in the message can indicate the second device to effectively resolve a problem that establishment of the unicast connection is abnormal. This improves efficiency of establishing the unicast connection, and ensures smooth execution of a unicast service between the two communication parties.