In-Vehicle Bluetooth Profile Connection Priority Control
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Solution Overview
Problem
In-vehicle apparatuses experience delayed music playback through Bluetooth AVP connections due to prioritizing data communication profile connections over AVP connections, leading to prolonged wait times for music playback to start after an HFP connection is established.
Innovation Solution
An in-vehicle apparatus with a priority order setting unit and connection units that prioritize AVP connections by establishing a first profile connection, such as HFP, followed by AVP, and then data communication profiles, ensuring quicker music playback initiation by controlling the Bluetooth profile connection scheme.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data communication profile connections are established before AVP connections, then data communication reliability is improved, but music playback start time is delayed
Solution Approach 1:
The patent applies preliminary action by pre-establishing the AVP connection profile before the data communication profile connection. The connection establishment process is modified to first attempt AVP connection (for music playback) and only after successful AVP connection does it proceed to establish the data communication profile (DUN). This reverses the conventional sequence and ensures music playback can start immediately without being delayed by prior data communication connection attempts.
2Device complexity
If multiple Bluetooth profiles are established in prioritized sequence, then connection management complexity is reduced, but AVP connection timing is delayed
Solution Approach 1:
The patent applies inversion by reversing the conventional profile connection sequence. Instead of establishing data communication profiles (DUN) before AVP profiles, the invention inverts the order to establish AVP connections first, then subsequently establish data communication profiles. This inversion resolves the timing issue where AVP connections were postponed, while maintaining simple prioritized sequence management through the modified order.
Data Source
AI summary
A control circuit of an the in-vehicle apparatus repeatedly performs a Bluetooth connection operation to connect to both of registered cellular phones and registered portable AV players in such a manner that, if an HFP connection has already been established to a cellular phone prior to an AVP connection to a portable AV player, the control circuit performs one round of AVP connection attempts to all of the registered portable AV players according to a priority order, prior to performing connection attempts to connect other data communication type profile to the cellular phone. By using such a profile connection scheme, the AVP connection attempt will not be delayed until after a connection attempt of the other data communication type profile.