Conference Server Bridged-Node Architecture for PoC Channel Efficiency
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Solution Overview
Problem
In wireless communications, establishing packet-based real-time media conferences can be hindered by the unavailability of traffic channels, and cellular service providers may want to limit the number of traffic channels for Push-to-Talk (PoC) calls, leading to inefficiencies in channel usage.
Innovation Solution
A method and system that utilize a conference server to coordinate the consolidation of media streams between multiple mobile stations onto a single traffic channel by designating one mobile station as a bridged-node, allowing it to act as a bridge for other participants, thereby optimizing the use of available traffic channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each mobile station is assigned a separate traffic channel for PoC calls, then call quality and reliability are improved, but the number of available traffic channels is depleted and channel usage efficiency deteriorates
Solution Approach 1:
Multiple mobile stations are merged into a single conference leg, sharing one traffic channel. The conference server combines multiple media streams into a single consolidated stream that travels over one traffic channel, while participants still receive individualized service quality.
Solution Approach 2:
A single traffic channel serves multiple functions by carrying consolidated media streams for multiple mobile stations simultaneously. The channel becomes a universal resource that can serve entire conferences rather than being dedicated to single participants.
2Productivity
If the cellular service provider limits the number of traffic channels for PoC calls, then channel usage efficiency is improved, but the capacity to support simultaneous calls deteriorates
Solution Approach 1:
Multiple conference legs are merged into single legs by consolidating media streams at the conference server. This allows multiple participants to share fewer traffic channels, increasing overall channel usage efficiency while maintaining support for multiple simultaneous calls through strategic consolidation.
Solution Approach 2:
The system changes the parameter of media stream distribution by consolidating multiple individual streams into fewer consolidated streams. This parameter change allows the same physical infrastructure to support more simultaneous calls with improved efficiency.
3Adaptability or versatility
If multiple traffic channels are allocated for PoC calls, then the capacity to support multiple simultaneous calls is improved, but the efficiency of channel usage deteriorates due to idle capacity
Solution Approach 1:
The system merges multiple media streams into consolidated streams that utilize traffic channels more efficiently. By combining streams at the conference server, the system reduces idle capacity and ensures that allocated channels are fully utilized across multiple participants.
4Productivity
If a bridged-node architecture is implemented, then traffic channel efficiency is improved through consolidation, but system complexity increases
Solution Approach 1:
The conference server acts as an intermediary that handles the complexity of stream consolidation and distribution. By centralizing the bridging function at the server level rather than requiring complex peer-to-peer coordination between mobile stations, the system achieves efficient channel usage while managing complexity in a controlled manner.
Data Source
AI summary
A method for a setting up a conference call with a mobile station and an intermediary mobile station, using the intermediary mobile station as a bridged-node. When a conference server receives a request to setup a conference call, the conference server initiates conference setup signaling with both mobile stations using a cellular link. The conference server uses the conference setup signaling to direct one mobile station to act as a bridged-node and the other mobile station to act as a bridged-leg. Responsive to the directives, the bridged-leg mobile station and the bridged-node mobile station establish a Wi-Fi link. The bridged-leg mobile station then uses the Wi-Fi link to bridge to an air traffic channel associated with the bridged-node mobile station.