Mobile Device Linking to Remote Audio Processor
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Solution Overview
Problem
Mobile communication devices experience latency issues when switching from a low power state to an active state to handle dispatch calls, leading to potential audio loss in wireless earpieces connected via Bluetooth, as they wake up too slowly to establish an audio link before the call is set up.
Innovation Solution
Implementing a method where the mobile communication device responds to an incoming dispatch call only after establishing a synchronous link with the remote audio processor, either by waiting until the link is fully powered or delaying the response by a selected time to ensure the link is established before connecting the call, thereby preventing audio loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the earpiece operates in low power sleep mode to conserve energy, then power consumption is reduced, but the wake-up time increases causing audio loss during dispatch calls
Solution Approach 1:
The system performs preliminary actions by initiating the wake-up sequence and establishing the audio link before the dispatch call is fully connected. The mobile communication device sends a wake-up signal to the earpiece upon detecting an incoming dispatch call, ensuring the earpiece is ready to receive audio data before the call audio starts flowing, thus preventing audio loss while maintaining sleep mode operation.
2Reliability
If the earpiece is kept in active state to reduce wake-up latency, then audio loss is prevented, but power consumption increases
Solution Approach 1:
Instead of maintaining continuous active state, the system uses periodic action by implementing event-triggered wake-up. The earpiece operates in sleep mode periodically and only activates when triggered by an incoming dispatch call signal from the mobile device. This approach maintains reliability for dispatch calls while minimizing overall power consumption through intermittent operation.
3Speed
If the mobile device responds to incoming dispatch call immediately, then call setup latency is reduced, but audio data may be lost if earpiece is not ready
Solution Approach 1:
The mobile communication device performs preliminary actions by detecting incoming dispatch calls and initiating the earpiece wake-up sequence before fully establishing the call audio path. This ensures the earpiece is prepared to receive audio data immediately when the call connects, preventing audio loss while maintaining fast dispatch call setup.
Data Source
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AI summary
A mobile communication device (100) uses a local wireless transceiver (108) to establish an asynchronous link (202) with a remote audio processor (110) which is typically operated in a low power mode and that maintains an association between the mobile communication device and remote audio processor. When the mobile communication device receives an incoming call page (210), the mobile communication device initiates a synchronous link with the remote audio processor, and responds to the incoming call page at a time when the call will be connected only after the synchronous link is established.