Social Alarm Unit Adaptive Communication Mode Selection
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Solution Overview
Problem
Existing social alarm systems face challenges in establishing effective communication between clients and system operators, particularly in determining the most appropriate communication mode based on the client's proximity to the alarm unit.
Innovation Solution
A social alarm unit with multiple communication modes (voice switched hands-free and tone switched half duplex) that automatically selects the most suitable mode based on the alarm trigger source, allowing operators to switch between modes as needed for optimal communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single communication mode is used in social alarm systems, then the system structure is simple, but communication quality deteriorates when client proximity varies
Solution Approach 1:
The system dynamically switches between different communication modes (voice-activated hands-free mode and tone-activated half-duplex mode) based on the detected alarm trigger type. This allows the communication characteristics to adapt to the client's proximity conditions without requiring manual configuration, resolving the contradiction between communication quality and system simplicity.
Solution Approach 2:
The alarm unit automatically determines the appropriate communication mode by detecting which alarm trigger was activated, without requiring operator intervention or complex external control systems. The system self-configures its communication parameters based on the trigger source, maintaining simplicity while improving communication reliability.
2Ease of operation
If voice switched hands-free mode is used for all clients, then operation is simple, but speech clarity deteriorates for remote clients
Solution Approach 1:
Different communication modes are applied based on the local condition of client proximity. Clients close to the alarm unit receive voice-activated hands-free communication, while remote clients receive tone-activated half-duplex communication with higher gain. This localized adaptation of communication characteristics resolves the contradiction between ease of operation and speech clarity.
3Measurement precision
If tone switched half duplex mode is used for all clients, then speech clarity improves for remote clients, but operation complexity increases
Solution Approach 1:
The system dynamically selects the communication mode based on the alarm trigger source rather than applying a fixed mode to all clients. This dynamic adaptation ensures that the more complex tone-switched mode is only used when necessary (for remote clients), while closer clients benefit from the simpler voice-activated mode, resolving the contradiction between speech clarity and ease of operation.
4Adaptability or versatility
If multiple communication modes are provided, then adaptability improves, but device complexity increases
Solution Approach 1:
The system achieves adaptability through self-service by automatically detecting the alarm trigger type and selecting the appropriate communication mode without requiring complex external control or manual configuration. This self-configuring approach provides multiple communication modes while minimizing the complexity of the switching mechanism.
Data Source
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AI summary
A social alarm unit (10) monitors the safety and wellbeing of a client in their own home or a sheltered housing scheme. The social alarm unit (10) provides a speech communication path, such as over a public switch telephone network (PSTN), to an operator at a remote monitoring station or control centre when an alarm is triggered. The social alarm unit (10) selects between at least first and second communication modes (e.g. between a voice switched hands free mode and a tone switched half-duplex mode) depending on whether the alarm signal is received from a first trigger device (16) indicating that the client is close to the social alarm unit (10), or a second trigger device (32) indicating that the client is relatively distant from the social alarm unit (10). Speech communication is thus optimized to the expected position of the client and effects such as feedback are minimized.