Room Control Device Using On-Demand Activation Codes
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Solution Overview
Problem
Existing methods for controlling comfort parameters in a room via mobile devices are complex, insecure, and inflexible, particularly due to reliance on Bluetooth pairing or username/password access, which are cumbersome and prone to misuse.
Innovation Solution
A control device that generates a locally available activation code on-demand, which can be used by a user's mobile device to securely control comfort parameters, with time- and location-limited access, using communication methods like NFC, IR, or Bluetooth, allowing secure and flexible control without prior login or registration processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Bluetooth pairing with fixed PIN number is used for access protection, then security is improved, but ease of operation deteriorates due to complex access procedure
Solution Approach 1:
The patent extracts the security verification process from the mobile device and places it in the room control device. The activation code is generated and displayed locally at the room control device, eliminating the need for complex Bluetooth pairing procedures while maintaining security through location-bound access codes.
Solution Approach 2:
The activation code serves as an intermediary between the user and the room control system. Instead of direct Bluetooth pairing or username/password authentication, the activation code mediates access by being displayed at the room control device and entered into the mobile device, simplifying the access procedure while maintaining security.
2Reliability
If username and password access protection is used via web server, then security is improved, but ease of operation deteriorates due to complex and inflexible access procedure requiring prior knowledge of access data
Solution Approach 1:
The activation code is prepared in advance at the room control device before the user needs to access the system. The code is generated and displayed locally, eliminating the need for users to have prior knowledge of URLs, usernames, or passwords. This preliminary preparation simplifies the access procedure while maintaining security.
Solution Approach 2:
The room control device serves itself by generating and displaying the activation code locally. Users do not need to contact an administrator or remember complex credentials - the system provides the necessary access information automatically at the point of use, making the access procedure simple and flexible.
3Reliability
If activation code is made available locally on output device only, then security is improved by preventing misuse, but loss of information increases as code must be manually entered or scanned
Solution Approach 1:
The patent replaces manual entry of the activation code with automated optical scanning using the mobile device's camera. This substitution eliminates manual typing errors and simplifies the transfer process while maintaining the security benefit of local code generation. The QR code or barcode display enables automatic reading by the mobile device.
4Reliability
If activation code is limited in time and location, then security is improved by preventing misuse, but adaptability deteriorates as code becomes valid only for specific conditions
Solution Approach 1:
The activation code's validity is made dynamic through time and location constraints. The code is generated based on current temporal and spatial conditions, automatically adapting to the specific context of use. This dynamic approach enhances security by ensuring codes are only valid when and where intended, while the system remains adaptable by generating new codes as needed for different users and situations.
Data Source
Figure 1~2
AI summary
Disclosed are an arrangement and a method for controlling comfort variables in a room in a manner limited in time and/or space by means of a mobile user device, e.g. a smart phone or tablet computer, said mobile device not being part of the infrastructure of the room but belonging to the user. An enable code that is available only locally provides secure access to control functions (e.g. temperature control, ventilation control) of a building automation system to which the room is assigned.