Early-Media Service Control Device for IMS Scheme Compatibility
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Solution Overview
Problem
Existing early media schemes in IMS environments often differ between caller and callee sides, leading to hindered service provision, as none of the existing technologies address the issue of differing schemes between the two parties.
Innovation Solution
An early-media service control device and method that includes a communication unit, resource reservation status determination, parameter value rewriting, session start request transmission control, and calling-in-progress notification transmission to ensure seamless early media service execution even when schemes differ, by rewriting resource reservation status parameters and transmitting appropriate notifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different early media schemes are used on caller and callee sides in IMS, then each side can operate according to its own scheme, but service provision is hindered due to incompatibility
Solution Approach 1:
The patent introduces an intermediary mechanism (session border controller or gateway) that mediates between caller and callee sides using different early media schemes. The intermediary translates and adapts signaling messages between different schemes, enabling incompatible systems to interoperate. This resolves the contradiction by allowing each side to maintain its own scheme while ensuring reliable service provision through the mediating component.
Solution Approach 2:
The patent employs parameter changes by dynamically adjusting signaling parameters and message formats based on the detected schemes of both parties. The system identifies the early media schemes in use and modifies message parameters accordingly to ensure compatibility. This allows the system to adapt to different schemes while maintaining reliable service delivery.
2Manufacturing precision
If resource reservation status is strictly enforced, then resource management is accurate, but early media service execution is blocked when schemes differ
Solution Approach 1:
The patent implements dynamic resource reservation status handling where the system can adjust reservation states based on the early media schemes being used. Rather than enforcing a fixed reservation status, the system dynamically modifies reservation behavior to accommodate different schemes, allowing accurate resource management while maintaining scheme flexibility.
Solution Approach 2:
The system performs preliminary detection of early media schemes before establishing resource reservations. By identifying the schemes in advance, the system can pre-configure appropriate reservation parameters that satisfy both accuracy requirements and scheme compatibility, preventing conflicts before they occur.
Data Source
AI summary
When a parameter included in a session start request indicates that a session-start-request-transmitting terminal device has reserved a resource, a parameter value rewrite unit rewrites the value of the parameter into a value indicating the resource unreserved. A session start request transmission control unit controls a communication unit to cause a session start request after the value of the parameter is rewritten to be transmitted to a session-start-request-receiving network. When the parameter value rewrite unit has not rewritten the value of the parameter, the received session start request is transmitted. When receiving a response indicating that a resource is reserved in a session-start-request-receiving terminal device, a calling-in-progress notification transmission control unit controls the communication unit so that calling-in-progress notification is transmitted to the session-start-request-transmitting terminal device.