VoIP Call Continuity via Infrastructure Bridging
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Solution Overview
Problem
VoIP call quality degradation and connectivity loss due to diminishing signal strength, interference, and IP infrastructure issues, such as traffic congestion and equipment failures, in wireless VoIP cordless telephones.
Innovation Solution
An apparatus and method that monitor IP packet quality metrics like jitter and packet loss, initiating a continuity call through a different infrastructure (e.g., cellular or wireline) when thresholds are crossed, bridging the call to maintain connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If VoIP calls use wireless data protocols (IEEE 802.11, Bluetooth) for mobility and low power consumption, then call terminals can be used cordlessly with IP packets originating directly in the terminal, but call quality degrades and connections are lost due to diminishing signal strength, interference, obstacles and other similar factors
Solution Approach 1:
The patent introduces a gateway as an intermediary component that bridges the wireless data protocol network and the telephony network. The gateway monitors call quality metrics (jitter, packet loss, delay) and initiates continuity calls through alternative paths when degradation is detected, thereby mediating between the unreliable wireless connection and the requirement for stable telephony service
Solution Approach 2:
The system performs preliminary monitoring of call quality metrics continuously during the VoIP call. By detecting threshold crossings in quality trend indicators before complete connection failure occurs, the system can proactively initiate continuity calls through alternative infrastructures, preventing total call loss rather than reacting after failure
2Adaptability or versatility
If VoIP calls rely on IP infrastructure for transmission, then call terminals can communicate using standardized IP protocols, but call quality degrades due to traffic congestion in the IP infrastructure, equipment degradation and failures
Solution Approach 1:
The patent adds an additional dimension to call transmission by establishing continuity calls through a different infrastructure (telephony network) parallel to the original IP-based wireless connection. This multi-path approach allows the system to switch dimensions of transmission when the IP infrastructure becomes congested or fails, maintaining call quality through diversified routing
3Duration of action of moving object
If the VoIP terminal moves in and beyond the wireless base-station cell, then the terminal maintains mobility and coverage flexibility, but the quality of the telephony transmission degrades and the connection is lost due to diminishing signal strength
Solution Approach 1:
The gateway implements feedback mechanisms by continuously monitoring call quality metrics (jitter, packet loss, delay) and using this information to trigger continuity call initiation. The system adjusts its behavior based on real-time quality measurements, creating a closed-loop control system that responds to signal degradation during terminal movement
Data Source
AI summary
An apparatus and a method for providing call continuity to a VoIP terminal user responsive to degrading call quality. The quality of a VoIP call is assesses by monitoring the quality of the corresponding IP packet traffic using conventional IP packet quality measures such as, for example, jitter, packet loss and packet delay. When a quality trend indicator crosses a predetermined threshold, a continuity call is originated to the user from a mechanism connected to the IP network. The continuity call uses a connection infrastructure different from the one used by the VoIP terminal such as, for example, a mobility infrastructure (cellular), a wireline infrastructure, a wireless data protocol infrastructure or other similar infrastructure. The continuity call is connected to the user, the original call is bridged with the continuity call and the leg of the original call to the user is dropped.