Handsfree Communication Control for Unintended Disconnections
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Solution Overview
Problem
Existing handsfree communication systems fail to properly control the connection of portable radio communication apparatuses with mobile communication networks when a short-range communication link is disconnected, leading to unintended disconnections and disruptions during phone conversations, especially when the engine of a vehicle is stopped.
Innovation Solution
A handsfree communication control method that sets a voice channel and data channel using short-range communication means between a handsfree apparatus and a portable radio communication apparatus, allowing the apparatus to maintain or interrupt the connection with the mobile communication network based on the detection of voice channel disconnections, ensuring user intention is respected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the portable radio communication apparatus is automatically disconnected from the mobile communication network when the short-range communication link is disconnected, then the connection management is simplified, but the user's intention to continue the phone conversation is ignored
Solution Approach 1:
The system introduces feedback by detecting the disconnection cause through channel status information and user operations, then adjusting the connection maintenance decision accordingly. The control unit monitors whether the disconnection was initiated by the apparatus itself or externally, and whether the user attempts to make a new call, using this feedback to determine whether to maintain the network connection.
Solution Approach 2:
The connection management becomes dynamic by allowing the system to adapt its behavior based on real-time conditions. Instead of a fixed automatic disconnection rule, the system dynamically adjusts whether to maintain or terminate the network connection based on the disconnection cause and user's subsequent operations, making the system flexible and context-aware.
2Duration of action of moving object
If the connection with the mobile communication network is maintained when the voice channel is disconnected, then the user can continue phone conversations, but unintended disconnections occur when the engine is stopped
Solution Approach 1:
The system performs preliminary detection of the disconnection cause before deciding on connection maintenance. By examining channel status information in advance and determining whether the disconnection was self-initiated or external, the system prepares the appropriate response strategy before the user's next operation, enabling accurate distinction between intentional and unintentional disconnections.
Solution Approach 2:
The system changes its operational parameters based on the detected disconnection cause. When the disconnection is determined to be self-initiated and the user attempts a new call, the system changes from a maintenance mode to a termination mode, adjusting the connection state parameter dynamically based on the changed conditions.
3Measurement precision
If the short-range communication link monitoring is enhanced to distinguish normal disconnection from link loss, then the connection control accuracy is improved, but the system complexity increases
Solution Approach 1:
The system uses its own existing channel status information and operation detection capabilities to determine the disconnection cause, without requiring external monitoring systems. The control unit leverages information already available in the communication channel and user operation records to make intelligent decisions, making the existing system serve the additional function of cause analysis.
Data Source
AI summary
A channel disconnection detecting unit detects whether a voice channel is disconnected by an AG or by an HF. When the voice channel is disconnected by the AG, an AG control unit controls a modulation/demodulation unit to maintain a connection of the AG with a BS and a switching unit switches a voice signal to an AG speaker and an AG microphone. When the voice channel is disconnected by the HF, the AG control unit controls the modulation/demodulation unit to interrupt the connection of the AG with the BS.