LMR Identifier Insertion for Cross-System Data Stream Synchronization
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Solution Overview
Problem
Emergency responders face challenges in synchronizing video and voice data streams across different communication systems, such as Project 25 (P25) compliant digital land mobile radio (LMR) services and broadband communication systems like IEEE 802.11 or LTE, due to the unsuitability of existing synchronization protocols like RTP and RTCP for LMR services.
Innovation Solution
Inserting LMR identifiers into broadband data streams to synchronize them with LMR data streams, using methods like associating P25 encryption synchronization fields and voice frame indices, and employing media processing systems to align and merge the data streams for synchronized reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LMR services are used for voice communications, then voice data can be transmitted reliably, but synchronization with video data becomes difficult
Solution Approach 1:
The patent introduces LMR identifiers as intermediary elements that are inserted into broadband data streams. These identifiers act as mediators that link LMR voice data streams with broadband video data streams, enabling synchronization without requiring complex protocol integration between the two different communication systems
Solution Approach 2:
The patent segments the synchronization problem by separating the identification function from the synchronization function. LMR identifiers are extracted and inserted as discrete elements into broadband streams at specific intervals, allowing the synchronization system to process and align data streams without requiring complete protocol compatibility
2Speed
If broadband communication systems are used for video data, then high speed data services are achieved, but existing synchronization protocols are not suitable for LMR services
Solution Approach 1:
The patent creates a universal synchronization mechanism that works across multiple communication systems. By inserting LMR identifiers into broadband streams, the system achieves multi-functionality where a single identification approach works for both LMR voice services and broadband video services, eliminating the need for system-specific synchronization protocols
Solution Approach 2:
LMR identifiers serve as a universal intermediary that bridges incompatible protocols. The identifiers are inserted into broadband data streams at defined intervals, creating a common reference point that enables synchronization between LMR and broadband systems without requiring either system to change its fundamental protocol
3Reliability
If LMR identifiers are inserted into broadband data streams, then synchronization is achieved, but data stream processing complexity increases
Solution Approach 1:
The patent applies partial action by inserting LMR identifiers only at specific intervals within broadband data streams rather than continuously. This selective insertion provides sufficient synchronization information to maintain alignment between voice and video streams while minimizing the processing overhead and complexity
Data Source
AI summary
A method of synchronizing a plurality of data streams. A land mobile radio (LMR) data stream can be generated by a LMR communication device. At least one LMR identifier can be communicated from the LMR communication device to a broadband communication device. A broadband data stream can be generated by the broadband communication device. The broadband data stream and the LMR identifier can be communicated from the broadband communication device via an access network. The LMR identifier can enable synchronization of the LMR data stream with the broadband data stream.