Dual Radiocommunication Access Control for Latency and Security
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Solution Overview
Problem
Existing secure access control methods using Bluetooth technology face issues with range conflicts and latency, particularly at short distances, due to varying phone terminal models and radiocommunication chip types, leading to security breaches and complex management of receiving power thresholds.
Innovation Solution
A secure access control method employing a dual radiocommunication module system in both the reader and mobile terminal, with a first module for medium/long-range communication and a second module for short-range communication, allowing automatic prioritization of the second mode of operation at short distances to inhibit latency and variable power threshold issues while maintaining medium/long-distance communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If medium or long-range wireless communication (BLUETOOTH) is used for access control, then communication range is extended, but latency increases and security risks arise at short distances
Solution Approach 1:
The communication system is segmented into two distinct modes: medium/long-range wireless communication mode and short-range wireless communication mode. The reader and mobile terminal each have separate communication modules for each mode. This segmentation allows the system to select the appropriate communication mode based on distance, using medium/long-range mode for distances greater than 15cm and short-range mode for distances of 15cm or less, thereby resolving the latency issue at short distances while maintaining extended range capability
Solution Approach 2:
The system dynamically switches between medium/long-range and short-range communication modes based on the detected distance between the mobile terminal and reader. The control module determines the distance and automatically selects the appropriate communication mode, making the system adaptive to changing conditions. This dynamic adjustment eliminates latency at short distances while preserving the extended range benefit
2Reliability
If receiving power thresholds are used to manage medium or long-range communication, then communication reliability is improved, but management complexity increases due to different phone terminal models
Solution Approach 1:
The system changes the operating parameters of the communication modules based on the detected communication mode. When short-range mode is detected (distance ≤ 15cm), the system switches to short-range communication with different power and protocol parameters, automatically adapting to the distance condition. This parameter change approach simplifies management compared to manually configuring receiving power thresholds for different phone models, as the system automatically adjusts parameters based on distance detection
3Loss of time
If short-range communication is prioritized at close proximity, then latency is reduced and security is enhanced, but system complexity increases with dual radiocommunication modules
Solution Approach 1:
The system is segmented into two independent communication pathways: medium/long-range communication modules and short-range communication modules. Each pathway has its own dedicated hardware and protocol stack. This segmentation allows the system to activate only the necessary communication mode based on distance, reducing the effective complexity at any given moment while providing both low-latency short-range capability and extended range capability when needed
Data Source
AI summary
A secure access control method uses a reader and a radiocommunication mobile terminal. The reader includes a first radiocommunication module having a first range and a second radiocommunication module having a second range less than the first range. The mobile terminal includes a first radiocommunication chip that establishes a first radiocommunication channel with the first radiocommunication module and a second radiocommunication chip that establishes a second radiocommunication channel with the second radiocommunication module. The method implements two modes of operation. In the first mode, when the mobile terminal is at a distance from the reader less than the first range and greater than the second range, the first radiocommunication channel is established. In the second mode, when the mobile terminal is at a distance from the reader less than the second range, the second radiocommunication channel is established as a priority.