Hands-Free Apparatus Protocol Switching for Wireless Interference

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Solution Overview

Problem

Simultaneous connection of multiple wireless communication protocols like PBAP, A2DP, and Wi-Fi in hands-free apparatuses leads to interference, resulting in deteriorated wireless communication quality, such as skipping sound and noise in music and video playback, and delays in browser updates.

Innovation Solution

A hands-free apparatus with a hardware processor that performs hands-free connections using specific protocols like HFP and PBAP, and manages data transfers to minimize interference by serially switching between HFP and PBAP connections, ensuring stable communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple wireless communication protocols (PBAP, A2DP, Wi-Fi) are simultaneously connected and communicated, then data transfer functionality is improved, but wireless communication quality deteriorates due to interference

Engineering Contradiction:

Improvedata transfer functionalityVSAvoidwireless communication quality

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent segments the simultaneous data transfer process into sequential phases: first establishing HFP connection for voice communication, then switching to PBAP connection for phone book data transfer, and finally switching to A2DP for music playback. This temporal segmentation eliminates protocol interference while maintaining all required functionalities.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic connection management where the hands-free apparatus actively switches between different communication protocols based on current operational needs. The system dynamically establishes, maintains, and terminates connections with mobile phones using different protocols at different times, optimizing both functionality and communication quality.

Inventive Principle:

Principle #15Dynamics

2Productivity

If PBAP and A2DP connections are made simultaneously for parallel data transfer, then productivity is improved, but communication stability deteriorates

Engineering Contradiction:

Improvedata transfer efficiencyVSAvoidcommunication stability

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

The patent employs periodic action by sequentially activating different data transfer protocols rather than maintaining them simultaneously. The system periodically switches between HFP, PBAP, and A2DP connections based on current task requirements, ensuring stable communication while achieving overall high productivity through structured sequential operations.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent maintains continuity of useful action by ensuring that while one protocol is active, another is prepared or transitioning. The seamless switching between protocols ensures that data transfer operations continue without interruption, maintaining productivity while preserving communication stability through controlled transitions.

Inventive Principle:

Principle #20Continuity of useful action

3Ease of operation

If hands-free connection and phone data transfer are performed simultaneously, then ease of operation is improved, but interference occurs between protocols

Engineering Contradiction:

Improvehands-free operationVSAvoidprotocol interference

Core Design Contradiction:

Ease of operationVSObject-generated harmful factors

Solution Approach 1:

The patent extracts the harmful interference element by separating hands-free voice communication (HFP) and phone data transfer (PBAP) into distinct temporal phases. During HFP connection for hands-free operation, PBAP data transfer is suspended, and vice versa. This extraction of interfering elements maintains ease of operation while eliminating protocol interference.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS11689652B2Hands-free apparatus, data transfer method, and computer-readable medium

Publication Date: 2023.06.27 PANASONIC AUTOMOTIVE SYST CO LTD

AI summary

A hands-free apparatus includes a memory, and a hardware processor coupled to the memory. The hardware processor is configured to: perform a hands-free connection process of connecting to a mobile phone by using a hands-free communication protocol for performing a hands-free phone conversation; perform a first data transfer process of making a first connection with the mobile phone by using a data transfer protocol for transferring phone data related to phone, and causing the phone data to be automatically or manually transferred from the mobile phone; and depending on a status of a different data transfer process than the first data transfer process, perform transfer control related to transfer by at least one of the first data transfer process and the different data transfer process.