Bi-directional Access Control Device with Local Decision Logic
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Solution Overview
Problem
Real-time bi-directional communication in wireless, battery-powered access control devices is limited by power consumption constraints, leading to impaired end-user applications and increased costs due to reliance on centralized decision-making systems, which can result in lost event history during power outages and delayed updates.
Innovation Solution
A system comprising an access control device with a processing unit and memory, capable of making local decisions, and a networked gateway using low-latency, low-power wireless protocols for real-time communication with an access control management host, enabling bi-directional communication and local access control decisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If master-slave topology is used to conserve battery power, then energy consumption is reduced, but communication latency increases and bi-directional real-time communication is impaired
Solution Approach 1:
The access control device periodically wakes up from sleep mode to initiate communication with the host system, then returns to sleep mode. This periodic wake-sleep cycle allows the device to maintain battery power conservation while enabling bi-directional real-time communication when needed, resolving the contradiction between energy saving and communication latency.
2Device complexity
If centralized access control decision-making is used, then system control is simplified, but reliability decreases during power outages and event history can be lost
Solution Approach 1:
The access control system is segmented into two parts: centralized host system for normal operation and local access control device for autonomous operation during outages. The local device contains embedded logic to independently make access decisions when disconnected, ensuring reliability during power outages while maintaining simplified centralized control during normal conditions.
3Reliability
If hard-wired power connection is used, then power supply reliability is improved, but installation and maintenance costs increase
Solution Approach 1:
The access control device autonomously manages its own power consumption by implementing sleep modes, periodic wake cycles, and efficient power states. This self-service power management enables the device to operate reliably on battery power without requiring hard-wired power connections, eliminating installation and maintenance costs associated with wiring while ensuring adequate power supply.
Data Source
AI summary
Systems and apparatuses for real time, bi-directional communications between an access control management host and one or more access control devices. The access control devices can be structured to make certain decisions at the access control device and communicate, in real time, information to, as well as receive in real time information from, the access control management host via a networked gateway. The access control device and networked gateway can communicate via a first wireless protocol that at least assists in minimizing the energy of an electrical energy source, such as, for example, a battery, that is coupled to the access control device. Examples of the first wireless protocol can include low latency, low-power wireless technologies or protocols. The networked gateway can communicate with the access control management host using a second protocol via a wired or wireless connection.