RF Memory Key for Portable Radio User Data Transfer
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Solution Overview
Problem
Portable communication devices, such as two-way radios, face challenges in conveying user identity and configuration information between devices without the need for reprogramming, which is inconvenient and prone to errors, and in controlling access to restricted features, especially in shared radio environments where security and ease of use are critical.
Innovation Solution
An RF memory key is attached to the antenna port of the device, using single wire bus circuitry to convey user identity, configuration, and access control information, allowing secure and easy transfer of data between radios and enabling or disabling restricted functionality without altering the device's form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user information is manually entered each time a new radio is used, then user identity can be conveyed, but the process is time-consuming and prone to errors
Solution Approach 1:
The patent uses a programmable key that stores and transfers user information (identity, configuration, access control) between radios. Instead of manually entering information each time, the key acts as a portable copy of user data that can be programmed once and then automatically transferred to any radio, eliminating manual entry errors and saving time.
Solution Approach 2:
The programmable key serves as an intermediary device between the user and the radio system. It holds user information and mediates the transfer process by automatically providing the necessary data to the radio when attached, eliminating the need for manual entry and reducing both time and error risks.
2Reliability
If hardware key with password protection is used for access control, then security is enhanced, but device form factor is altered and complexity increases
Solution Approach 1:
The programmable key serves multiple functions: it provides user identification, stores configuration information, enables access control to restricted features, and can be used across different radio models. This multi-functionality achieves enhanced security without requiring separate dedicated hardware components for each function, thereby limiting the increase in device complexity.
Solution Approach 2:
The patent extracts the access control functionality from the radio itself and places it in the external programmable key. This allows the radio to maintain its original form factor and internal simplicity while still providing enhanced security through the external key mechanism that contains the access control logic and credentials.
3Adaptability or versatility
If reprogramming is performed when user changes radios, then user information can be transferred, but the process requires programming equipment that may not be readily available
Solution Approach 1:
The programmable key is pre-programmed with user information in advance using programming equipment only once. After this preliminary action, the key can be freely attached to any radio and automatically provide the stored user information without requiring additional programming equipment or reprogramming operations, making the transfer process convenient and universally applicable.
Data Source
AI summary
A portable communication device (100) includes a radio (102) and RF memory key (104) that allows both RF and baseband signals to be transported over the radio antenna port. A single wire memory device (134) is embedded into RF memory key (104) along with frequency diplexing circuitry (116) to transport single wire bus communications between the radio (102) and RF memory key (104) while RF is passed from the radio (102) to an antenna (150).