Playback Queue Access Control Using Application Identifiers

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Solution Overview

Problem

Existing media playback systems lack efficient methods for managing playback queues across multiple control devices, leading to conflicts and inconsistencies when different control applications attempt to manipulate the same playback queue.

Innovation Solution

Implementing a control mechanism in devices to manage playback queues by using application identifiers and queue identifiers to manage playback queues across multiple control devices, leading to conflicts and inconsistencies when different control applications attempt to manipulate the same playback queue.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple control applications can manipulate the same playback queue simultaneously, then the system is more versatile and user-friendly, but conflicts and inconsistencies occur leading to unreliable queue management

Engineering Contradiction:

Improveability of multiple control applications to manipulate playback queueVSAvoidconsistency of playback queue management

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent introduces a queue identifier as an intermediary element that mediates between multiple control applications and the playback queue. Each control application receives a unique queue identifier when it gains control, and this identifier must be included in all subsequent queue manipulation commands. This intermediary mechanism ensures that only the controlling application can modify the queue, preventing conflicts while maintaining system versatility

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent segments the playback queue management by associating each control application with a specific queue identifier. This segmentation divides the previously unified queue management into application-specific control sessions, where each application operates independently with its own identifier, eliminating conflicts while allowing multiple applications to interact with the queue at different times

Inventive Principle:

Principle #1Segmentation

2Productivity

If the system maintains a single shared playback queue for all control devices, then resource utilization is efficient, but conflicts arise when different applications attempt to manipulate the queue simultaneously

Engineering Contradiction:

Improveefficiency of playback queue resource utilizationVSAvoidconflicts and inconsistencies in queue manipulation

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent implements dynamic control of the playback queue by establishing a controlling application concept. The system dynamically transitions control between different applications based on user actions, and the queue identifier changes dynamically to reflect current control ownership. This dynamic approach allows efficient single-queue utilization while preventing simultaneous manipulation conflicts through controlled access transitions

Inventive Principle:

Principle #15Dynamics

3Ease of operation

If the system allows any control application to manipulate the playback queue without restrictions, then ease of operation is maximized, but system reliability deteriorates due to conflicts

Engineering Contradiction:

Improveability of control applications to manipulate playback queueVSAvoidconsistency of queue state

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent implements feedback mechanisms where the playback device sends queue identifiers back to the controlling application after queue operations. The controlling application must include this received queue identifier in subsequent commands, creating a feedback loop that ensures only the authorized application can manipulate the queue. This maintains ease of operation while guaranteeing reliability through automated verification

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20260064768A1Queue identification

Publication Date: 2026.03.05 SONOS INC

AI summary

Example techniques relate to a playback device that facilitates queue identification. In an example implementation, a playback device receives, from a first controller, instructions representing a command to populate a playback queue with one or more first media items; the instructions are associated with a first application identifier corresponding to the first controller. Based on the received instructions, the playback device populates the playback queue with the one or more first media items and forms an association between the playback queue and the first application identifier. The playback device receives, from a second controller, instructions representing one or more first commands to access the playback queue; the instructions are associated with a second application identifier corresponding to the second controller. The playback device determines that the second application identifier is different from the first application identifier and denies the one or more first commands to access the playback queue.