Group Call Setup in Multi-Network Wireless Systems
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Solution Overview
Problem
In wireless communication systems, public safety officers face delays in setting up Push-To-Talk calls due to resource unavailability, which can endanger safety during emergency incidents, as existing systems queue calls when networks are congested, leading to insufficient resources.
Innovation Solution
Implementing a method and apparatus that allows a group call to be set up in a secondary network when resources are insufficient in the primary network, by conveying a group call request from the primary network to a secondary network, enabling the establishment of an originating leg of the call, thereby ensuring continuous communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network queues calls when resources are unavailable, then call setup delay increases, but network resource overload is avoided
Solution Approach 1:
The patent introduces a secondary network as an intermediary system to handle group calls when the primary network lacks resources. The Call Controller detects resource insufficiency in the primary network and automatically establishes the call in the secondary network instead of queuing, thus eliminating delay while avoiding primary network overload
Solution Approach 2:
The solution adds a dimensional alternative by introducing a secondary network dimension for call establishment. When the primary network dimension is congested, the system transitions to the secondary network dimension, providing an additional pathway for call setup without increasing load on the primary network
2Device complexity
If the primary network handles all group calls, then network complexity is minimized, but resource insufficiency occurs during congestion
Solution Approach 1:
The patent makes the network system multi-functional by enabling both primary and secondary networks to handle group calls. The Call Controller is designed to selectively route calls to either network based on resource availability, making the overall system more reliable without requiring complex structural changes to individual network components
Data Source
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AI summary
A communication system is provided that sets up a group call in a second originating network when insufficient resources are available in the first originating network. The first originating network is one of a narrowband network and a broadband network and the second originating network is the other network of the narrowband and broadband networks. In response to determining that insufficient network resources are available, an infrastructure device arranges to set up an originating leg of the group call for the originating mobile device in the second originating network.