VoIP Call Routing via Multimedia Gateway Controller
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Solution Overview
Problem
VoIP networks face challenges in ensuring Quality of Service due to rapid network changes, packet loss, delay, and out-of-order delivery, which are not effectively addressed by existing technologies that separate voice call routing between voice and data network domains.
Innovation Solution
A VoIP call routing system with a multimedia gateway controller that includes a VoIP resource manager, data measurement module, and route decision module to intelligently route calls around congested or failing network segments, using a combination of IP and TDM paths prioritized by availability and reachability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If voice call routing is separated into voice network domain and data network domain, then network infrastructure complexity is reduced, but VoIP call quality and reliability deteriorate due to inability to coordinate routing decisions across domains
Solution Approach 1:
The patent introduces a media gateway controller as an intermediary component that bridges the voice network domain and data network domain. This controller coordinates routing decisions by measuring data network conditions and influencing voice network routing choices, enabling QoS-aware VoIP routing while maintaining the separated infrastructure architecture.
2Device complexity
If IP network routing operates only in data network domain, then data network routing simplicity is maintained, but voice call routing capability is lost due to lack of application layer operability
Solution Approach 1:
The patent enables the data network routing function to serve dual purposes: traditional data routing and VoIP call routing. The media gateway controller measures data network conditions (packet loss, delay, throughput) and uses this information to influence voice network routing decisions, making the data network routing capability universally applicable to both data and voice traffic.
3Adaptability or versatility
If network conditions change rapidly and continuously, then network adaptability is improved, but VoIP connectivity guarantee is lost due to dynamic packet loss and delay
Solution Approach 1:
The patent implements preliminary measurement of data network conditions before routing voice calls. The media gateway controller continuously monitors packet loss, delay, and throughput metrics in advance, and uses this pre-collected information to make informed routing decisions that proactively avoid problematic network segments, thereby maintaining connectivity guarantees despite rapid network changes.
4Adaptability or versatility
If packet loss and delay occur in IP network, then network flexibility is maintained, but VoIP voice quality deteriorates due to out of order delivery and echoes
Solution Approach 1:
The patent establishes a feedback mechanism where the media gateway controller continuously monitors data network conditions (packet loss, delay, throughput) and uses this information to dynamically influence voice network routing decisions. This closed-loop feedback enables the system to adapt routing paths in real-time based on actual network performance, maintaining voice quality while preserving network flexibility.
Data Source
AI summary
A method of routing a voice call from a local media gateway to a terminating media gateway comprises determining IP network connectivity between the local media gateway and terminating media gateway and generating monitoring results, updating network resource status according to the monitoring results, generating a plurality of routes between the local media gateway and the terminating media gateway in response to the updated network resource status, determining a best route from the plurality of routes, and routing the voice call using the best route.