Call Handoff via Reflected Media Session
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Solution Overview
Problem
Current mobile electronic devices and wireless networks face challenges in meeting increasing demands for functionality due to limitations in call handoff management across different transport types, such as Wi-Fi and mobile transports, leading to suboptimal performance compared to mains-powered and wired systems.
Innovation Solution
A method and system for managing call handoff that involves monitoring available transports, establishing a reflected media session to evaluate call quality, and initiating handover from one transport to another when quality thresholds are met, using a processor and communications interface in mobile devices and a server to shuffle call media between sessions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If call handoff is managed across different transport types (Wi-Fi and mobile transports), then adaptability and functionality are improved, but call quality and reliability deteriorate due to suboptimal performance
Solution Approach 1:
The system performs preliminary evaluation of the second transport's call quality by establishing a reflected media session before completing the handoff. This allows the system to assess whether the target transport can maintain adequate call quality prior to committing to the handoff, thereby preventing degradation of call reliability.
Solution Approach 2:
The system establishes a reflected media session that provides feedback about the quality of the second transport. By monitoring call quality metrics through this reflected session, the system can determine whether handoff conditions are met before executing the transport switch, ensuring reliability is maintained.
2Measurement precision
If a reflected media session is established to evaluate call quality, then call quality assessment capability is improved, but device complexity and processing requirements worsen
Solution Approach 1:
The reflected media session serves multiple functions: it evaluates call quality of the second transport, provides feedback for handoff decision-making, and can be integrated with existing media handling infrastructure. This multi-functionality reduces the need for separate evaluation mechanisms, thereby limiting the increase in device complexity.
3Stability of the object's composition
If seamless handover between transports is implemented, then service continuity and user experience are improved, but handoff management complexity worsens
Solution Approach 1:
The reflected media session acts as an intermediary mechanism that simplifies handoff management by providing structured quality feedback. Rather than directly managing complex handoff logic, the system uses the reflected session as a mediator to assess conditions and trigger handoff decisions, thereby reducing management complexity while maintaining seamless continuity.
Data Source
AI summary
A method, system and apparatus for managing call handoff are provided. A mobile device engaged in a first media session over a first transport determines a second transport is available. A reflected media session is established via an echo server over the second transport. Quality of the reflected media session is evaluated by determining a call metric based on call transport data received at the mobile device from the mobile device (itself) in the reflected media session. Call handover is requested from the first media session to a second media session over the second transport when the call metric indicates that the quality of the reflected media session meets a threshold.