Voice Communication Device Talk Group Filtering

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Solution Overview

Problem

Institutional users face challenges in transmitting voice communications related to multimedia sessions without disrupting their primary talk group affiliation, leading to potential missed mission-critical communications and user discomfort due to distracting conversations.

Innovation Solution

Voice communication devices receive a session identifier from associated data communication devices, transform it into a session key identifier, and combine it with a voice encryption key identifier to generate a signaling key identifier, which is used to encrypt and filter voice streams, ensuring only relevant communications are presented to users participating in multimedia sessions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If users change talk group affiliation to a secondary talk group during multimedia sessions, then voice communications related to multimedia sessions can be transmitted without distraction to non-participants, but users may miss mission-critical communications directed to their primary talk group

Engineering Contradiction:

Improvedistracting conversations to non-participantsVSAvoidmission-critical communications reception

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent segments the voice stream into multiple independent streams, each associated with a different talk group. The voice communication device can selectively receive and process specific voice streams based on talk group identifiers, allowing users to participate in multimedia sessions while maintaining awareness of primary talk group communications without being distracted by irrelevant conversations.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces an intermediary mechanism (the voice communication device with talk group filtering capability) that mediates between multiple talk groups and the user. This intermediary selectively filters and presents relevant voice communications while blocking distracting ones, resolving the contradiction between participating in multimedia sessions and receiving mission-critical communications.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If users remain affiliated with their primary talk group during multimedia sessions, then mission-critical communications are received without interruption, but voice communications related to multimedia sessions become distracting to all users in the talk group

Engineering Contradiction:

Improvemission-critical communications receptionVSAvoiddistracting conversations to non-participants

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The voice communication system segments the broadcast voice stream by talk group identifiers. Users remaining in their primary talk group can receive filtered voice communications where only relevant streams (multimedia-related and mission-critical) are presented, while distracting streams from other talk groups are automatically blocked.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality filtering where each user's voice communication device independently filters voice streams based on their specific talk group affiliations and current session context. This allows customized noise suppression for each user while maintaining their primary talk group affiliation, ensuring mission-critical communications are received without distraction from irrelevant conversations.

Inventive Principle:

Principle #3Local quality

3Object-affected harmful factors

If users switch between primary and secondary talk groups for multimedia sessions, then voice communications can be isolated to participants, but the device complexity and user confusion increase

Engineering Contradiction:

Improvedistracting conversationsVSAvoidtalk group management complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent implements preliminary action by pre-configuring multiple talk group affiliations in the voice communication device before multimedia sessions begin. The device automatically activates the appropriate talk group filtering based on session context, eliminating the need for users to manually switch talk groups during sessions and reducing operational complexity.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The voice communication device performs self-service by automatically managing talk group switching and voice stream filtering based on detected session context. The device monitors ongoing multimedia sessions and autonomously adjusts talk group affiliations to isolate relevant voice communications while blocking distractions, without requiring user intervention or complex manual configuration.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS8681981B2Method and apparatus for transmitting voice communications related to a multimedia session

Publication Date: 2014.03.25 MOTOROLA SOLUTIONS INC

AI summary

A method and apparatus for transmitting a subset voice stream associated with a subset talk group. A voice communication device receives a session identifier from an associated data communication device engaged. The voice communication device transforms the session identifier into a session key identifier, obtains an encryption algorithm implementing a subset talk group filtering feature and a voice encryption key identifier, and combines the session key identifier with the voice encryption key identifier to generate a signaling key identifier. The voice communication device associates the signaling key identifier and an encryption algorithm identifier with the subset voice stream during transmission of the subset voice stream to a receiving voice communication device.