Location-Aware Audio Playback Control for Accurate Zone Switching

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Solution Overview

Problem

Existing media playback systems face challenges in accurately determining the location of control devices within zones, leading to incorrect zone control and potential user experience degradation due to uncertainties in radio transmission and environmental interference.

Innovation Solution

Implement location-based awareness techniques to verify the proximity of control devices to zones before initiating control commands and display notifications when outside the threshold proximity, and facilitate zone grouping based on accurate location detection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If radio transmission is used for zone control, then wireless communication capability is improved, but location determination accuracy deteriorates due to environmental interference

Engineering Contradiction:

Improvewireless communication capabilityVSAvoidlocation determination accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent combines multiple location determination methods (radio transmission signal strength analysis and proximity detection) to compensate for the weaknesses of each individual method. By merging these approaches, the system achieves both wireless communication capability and improved location determination accuracy, resolving the technical contradiction between adaptability and measurement precision.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The system implements feedback mechanisms where the control device continuously monitors location determination results and adjusts its control actions accordingly. When location uncertainty is detected, the system requests verification through additional detection methods, creating a feedback loop that maintains accuracy despite environmental interference affecting radio transmissions.

Inventive Principle:

Principle #23Feedback

2Ease of operation

If automatic zone control is implemented, then ease of operation is improved, but reliability deteriorates due to incorrect zone control actions

Engineering Contradiction:

Improveautomatic control convenienceVSAvoidzone control accuracy

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent implements preliminary verification actions before executing automatic zone control. The system performs multiple location determination attempts and verifies results before initiating control commands. This preliminary action prevents incorrect zone control while maintaining automatic operation, resolving the contradiction between ease of operation and reliability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system applies preliminary anti-action by implementing checks and verification steps that prevent incorrect control actions before they occur. When location determination is uncertain, the system actively prevents automatic control execution and requests manual verification, thereby maintaining reliability while preserving automatic control functionality.

Inventive Principle:

Principle #9Preliminary anti-action

3Measurement precision

If multiple detection methods are used to verify location, then location determination accuracy is improved, but device complexity increases

Engineering Contradiction:

Improvelocation determination accuracyVSAvoidsystem complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies partial action by using multiple detection methods selectively rather than continuously. The system employs additional verification methods only when initial location determination shows uncertainty or when control actions require higher confidence. This approach improves location accuracy while minimizing the added complexity to only what is necessary.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS12519999B2Location based playback system control

Publication Date: 2026.01.06 SONOS INC

AI summary

Example implementations may involve using a prompt to prevent inadvertent control or playback of audio content. When a mobile device receives input data indicating a command to play back audio content on a first playback device, the mobile device determines whether the mobile device is in proximity to the first playback device. If the mobile device determines that the mobile device within a given proximity to the first playback device, the mobile device transmits, via the network interface, one or more commands to instruct the first playback device to play back the audio content. However, if the mobile device determines that the mobile device outside the proximity, the mobile device displays a prompt indicating that the mobile device is the outside the given proximity to the first playback device and a selectable control that, when selected, transmits the one or more commands to play back the audio content.