Long-Range RFID Credential Tracking for Access Control
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Solution Overview
Problem
RFID-based access control systems face challenges in high traffic scenarios, such as crowded venues and mass transit, where the need to physically 'tap' a credential against a reader causes congestion and inefficiencies due to the short range of communication protocols.
Innovation Solution
Implementing a system that uses longer range protocols to establish communication with credentials at a greater distance, allowing for initial verification and tracking, and delaying access control decisions until the credential is within a closer range, thereby reducing congestion and improving throughput while maintaining security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If short-range RFID protocols are used for access control, then security is maintained through close proximity verification, but throughput decreases due to crowd flow issues and congestion at access points
Solution Approach 1:
The system performs preliminary actions by establishing communication links and verifying credentials at a distance before the credential reaches the access point. The reader begins tracking and validating the credential when it enters the engagement range, allowing verification processes to start early and reducing wait time at the access point itself.
Solution Approach 2:
The patent introduces a temporal dimension to the access control process by separating verification timing from access decision timing. Credentials are verified continuously over time as they approach, rather than all at once at the access point, distributing the verification load across multiple time points and improving throughput.
2Reliability
If credentials are verified only at close proximity, then security is ensured through physical tapping, but crowd flow is disrupted due to required stopping and tapping actions
Solution Approach 1:
The patent replaces the mechanical tapping action with wireless communication. Instead of requiring physical contact or close proximity tapping, the system uses radio frequency communication to establish links and verify credentials at a distance, eliminating the mechanical interaction that disrupts crowd flow.
Solution Approach 2:
The engagement range acts as an intermediary zone between the credential holder and the access point. Verification processes occur in this intermediate space rather than requiring direct interaction at the access point, allowing smooth crowd flow while maintaining security through continuous tracking and verification.
3Productivity
If access control decisions are made immediately upon credential detection, then throughput is improved by reducing wait time, but security is compromised by making decisions before full verification
Solution Approach 1:
The system performs preliminary verification actions during the approach phase while maintaining the option to delay the final access control decision. Credential validation, tracking establishment, and security checks begin early, but the actual access decision is timed to occur when the credential is at the appropriate distance, ensuring both security and throughput.
Solution Approach 2:
The system dynamically adjusts the timing of access control decisions based on real-time credential location and verification status. Rather than using fixed timing, the decision to grant or deny access is made flexibly based on whether verification is complete and whether the credential is at the appropriate proximity, optimizing both security and throughput conditions.
Data Source
AI summary
An access control system may comprise a credential including credential data, and at least one reader. The at least one reader is configured to receive, over a link, the credential data. The at least one reader is configured to verify that the credential is valid based on the credential data, and mark the credential as valid and track a location of the credential relative to the at least one reader. The at least one reader is configured to make or delay an access control decision for the credential based on the location of the credential.