Dual-Multi-Watch PTT Audio Prioritization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional push-to-talk (PTT) systems often miss calls when public safety personnel try to listen to multiple groups simultaneously due to limitations in scanning methods, which are prone to missed audio activity on multiple radio frequencies.
Innovation Solution
The implementation of dual/multi-watch technology across multiple devices, utilizing a VoIP path for simultaneous audio streaming and intelligent call management, allowing prioritization and spatial separation of audio streams between devices, with a gateway component for protocol conversion and a PTT-VoIP client for coordinated audio handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional scanning methods are used to monitor multiple PTT groups, then the system can detect audio activity on radio frequencies, but calls are missed when audio activity occurs on two or more groups simultaneously
Solution Approach 1:
The patent divides the multi-group monitoring task across multiple communication devices, with each device dedicated to monitoring specific PTT groups. This segmentation allows simultaneous monitoring of multiple groups without missing calls, as each device independently detects and reports audio activity on its assigned groups to a scan list manager.
Solution Approach 2:
The patent introduces a scan list manager as an intermediary component that coordinates between multiple communication devices and the PTT groups. The manager receives audio activity reports from multiple devices, manages the scan list, and determines which device should monitor which groups, enabling reliable multi-group monitoring without call misses.
2Reliability
If multiple communication devices are used to monitor multiple PTT groups, then call detection reliability improves, but device complexity and coordination requirements increase
Solution Approach 1:
Each communication device autonomously monitors its assigned PTT groups and self-reports audio activity to the scan list manager without requiring complex inter-device coordination. The devices independently perform detection and reporting functions, reducing system coordination complexity while maintaining high reliability through distributed monitoring.
Data Source
Figure 1
Figure 2
AI summary
A communication system (100) provides dual-watch and multi-watch capability for group PTT services. Incoming PTT calls are prioritized and played out in accordance with prioritized devices (130). A user of multiple communication devices can hear received audio traffic being played out in accordance with the priority assigned to the group call and the priority assigned to the communication device. Numerous calls can be simultaneously received and managed.