Mobile Communication Device Network Fallback Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In combined LMR and cellular broadband communication systems, the lack of BCN signal coverage in certain geographic areas leads to uncertainty about the availability of broadband communication capabilities for mobile communication devices, hindering situational awareness for incident commanders and dispatchers.
Innovation Solution
The system utilizes the reliable LMR network to report BCN access interruptions and status, allowing the MCD to temporarily store audio and video data, and switch to LMR for lower data-rate applications, ensuring continuous communication and situational awareness by leveraging the LMR network as a fallback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If BCN (broadband cellular network) is used for high-speed data communications, then communication speed and latency performance are improved, but coverage reliability deteriorates in certain geographic areas
Solution Approach 1:
The patent introduces LMR network as an intermediary fallback communication channel. When BCN is unavailable, the system automatically switches to LMR network to maintain connectivity, ensuring continuous communication capability. This mediator approach resolves the contradiction by providing an alternative path when the primary high-speed network is inaccessible.
Solution Approach 2:
The system dynamically changes the communication network parameter (switching between BCN and LMR networks) based on availability conditions. The mobile communication device monitors network status and adjusts its communication pathway in real-time, transitioning from broadband to narrowband mode when necessary to maintain operational reliability.
2Reliability
If LMR network is used for voice communications, then coverage reliability is improved, but communication speed deteriorates
Solution Approach 1:
The patent implements a dynamic network selection mechanism where the mobile communication device can switch between LMR and BCN networks based on real-time availability and requirements. The system dynamically adjusts its operational mode - using LMR for reliability when needed and BCN for high-speed data when available, optimizing the trade-off between these two parameters.
3Reliability
If BCN access interruption is detected, then continuous communication capability is maintained through LMR, but data storage requirements increase temporarily
Solution Approach 1:
The system performs preliminary actions by storing audio and video data locally in the mobile communication device before BCN access is lost. This ensures that critical data is preserved and can be transmitted later when connectivity is restored, maintaining communication continuity while managing data storage requirements through proactive data capture.
Data Source
AI summary
A mobile communication device (MCD) in a network uses a land mobile radio (LMR) transceiver to facilitate voice communications through an LMR network to a dispatch center. A broadband cellular network (BCN) wireless modem in communication with the MCD implements a BCN wireless communication protocol for broadband data communications between the MCD and a remote dispatch center. When a BCN access interruption occurs, the MCD will automatically communicate to the remote dispatch center a notification of the BCN access interruption, by using the LMR network, and data otherwise communicated through the BCN is automatically communicated through the LMR network.