Proxy Media Service for Push-to-Talk Interoperability
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Solution Overview
Problem
Current communication systems for public and private security groups, such as police and fire departments, face inefficiencies in interoperability between different communication networks using push-to-talk technologies, particularly due to the half-duplex nature of land mobile radios which restricts simultaneous two-way communication.
Innovation Solution
A method and system that facilitates push-to-talk communication sessions by using a full duplex endpoint to communicate with multiple half duplex endpoints, including a proxy media service that mixes monitored communication streams for low-bandwidth networks, enabling users to control floor access and monitor multiple sessions across different networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If push-to-talk communication is implemented using half-duplex endpoints (land mobile radios), then interoperability between different security networks is achieved, but simultaneous two-way communication is restricted
Solution Approach 1:
The patent introduces a gateway as an intermediary device that bridges half-duplex push-to-talk networks and full-duplex IP-based networks. The gateway translates and mediates communication between these different network types, enabling interoperability while allowing full-duplex endpoints to maintain simultaneous two-way communication capabilities without being constrained by half-duplex limitations
Solution Approach 2:
The system segments communication functionality by separating control signaling from media transmission. Floor control signals are handled separately through the gateway, while media streams are transmitted independently, allowing full-duplex endpoints to communicate simultaneously with multiple half-duplex endpoints without conflict
2Adaptability or versatility
If multiple communication streams are transmitted to users over low-bandwidth networks, then network accessibility is improved, but bandwidth consumption exceeds available capacity
Solution Approach 1:
The patent combines multiple communication streams into a single mixed audio stream using a media server or gateway. Instead of transmitting separate streams to each user over low-bandwidth connections, the system merges multiple input streams and transmits a consolidated output stream, significantly reducing total bandwidth consumption while maintaining accessibility
Solution Approach 2:
The system provides a universal communication service that adapts to different network conditions. The same infrastructure supports both high-bandwidth scenarios (where multiple streams could be transmitted) and low-bandwidth scenarios (where stream mixing is applied), making the system universally accessible across varying network capacities
Data Source
AI summary
A method for providing a push-to-talk proxy media service includes receiving a plurality of monitored push-to-talk communication streams over a high bandwidth connection and mixing the plurality of monitored push-to-talk communication streams into a mixed communication stream. The method also includes transmitting the mixed communication stream to a user endpoint over a low bandwidth connection.