In-Vehicle Handsfree Apparatus Call Link Switching
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Solution Overview
Problem
Existing in-vehicle handsfree apparatuses cannot effectively manage multiple cellular phones connected simultaneously, particularly failing to handle incoming calls on one phone while another is in a calling state, leading to usability issues.
Innovation Solution
An in-vehicle handsfree apparatus with a control section that switches call links between multiple connected cellular phones by issuing suspension and incoming call response signals, allowing users to manage incoming calls and switch call sound paths between phones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an in-vehicle handsfree apparatus establishes handsfree profile connections with multiple cellular phones simultaneously, then the apparatus can support multiple phones in handsfree standby state, but it cannot respond to incoming calls on one phone when another is in a calling state
Solution Approach 1:
The patent implements dynamic call link management by enabling the handsfree apparatus to switch between different cellular phones based on call state. When a phone in calling state receives an incoming call, the system dynamically transitions the call link from the first phone to the second phone, allowing flexible response to incoming calls while maintaining multi-profile connections.
Solution Approach 2:
The patent changes the call link parameter from a fixed connection to a switchable connection. By introducing suspension request signals and incoming call response request signals, the system can change the operational state of call links between different phones, enabling the first phone's call link to be suspended and the second phone's call link to be activated when needed.
2Ease of operation
If the handsfree apparatus switches call links between multiple cellular phones, then user usability is enhanced, but the system complexity increases
Solution Approach 1:
The patent makes the handsfree apparatus universal by enabling it to handle multiple call scenarios through a unified control mechanism. The same control section manages both single-phone and multi-phone operations, and the same signal types (suspension request, incoming call response request) are used regardless of which phones are connected, reducing the need for separate handling logic for different scenarios.
Data Source
AI summary
An in-vehicle handsfree apparatus establishes a handsfree profile connection with a first cellular phone and a second cellular phone simultaneously. It is assumed that while the first cellular phone is in a calling state, the second cellular phone receives an incoming call. When a user operates a response to the second cellular phone in the incoming call receiving state, a suspension request signal is transmitted to the first cellular phone in the calling state to thereby switch the call link of the first cellular phone to a suspending state. In contrast, an incoming call response request signal is transmitted to the second cellular phone to thereby switch the call link of the second cellular phone from the incoming call receiving state to a calling state. The connection partner of a call sound path is changed from the first cellular phone to the second cellular phone.