Online Charging Control for CS-IMS Voice Continuity
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Solution Overview
Problem
Existing online charging solutions fail to process fees correctly when providing services that involve both the CS domain and the IMS, leading to incomplete and inaccurate charging, especially during Voice Call Continuity, and impose a high workload due to the need for online CS/IMS charging correlation.
Innovation Solution
A method that avoids invoking online charging in the CS domain by canceling CAMEL subscription data or modifying service data, and performs credit control through interactions with the OCS in the IMS using standard Ro or CAP interfaces, ensuring centralized credit control across both domains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If online charging is invoked in both CS domain and IMS for services involving simultaneous domain usage, then charging coverage is improved, but charging accuracy and complexity increase due to double charging and correlation requirements
Solution Approach 1:
The patent extracts the online charging function from the CS domain by canceling CAMEL subscription data, leaving only the IMS domain to handle charging for services involving simultaneous domain usage. This eliminates the complexity of correlating charging records between CS and IMS domains while maintaining accurate charging coverage.
Solution Approach 2:
The patent makes the IMS centralized control system universally responsible for online charging in services involving both CS and IMS domains. The IMS domain assumes the multi-functional role of managing charging for domain transfer services, replacing the need for separate CS domain charging systems.
2Adaptability or versatility
If centralized credit control is implemented in IMS for services involving CS domain, then charging uniformity is improved, but the workload for CS/IMS charging correlation increases
Solution Approach 1:
The patent removes the charging correlation workload from the IMS system by extracting the online charging function from the CS domain. This eliminates the need for IMS to correlate charging records with CS domain charging, thereby reducing processing workload while maintaining uniform charging control.
3Device complexity
If CAMEL subscription data is canceled to avoid online charging in CS domain, then charging complexity is reduced, but charging completeness may be affected
Solution Approach 1:
The patent ensures charging completeness by making the IMS centralized control system universally responsible for all online charging in services involving both CS and IMS domains. The IMS system assumes the multi-functional role of managing charging, ensuring that charging records are complete without requiring complex CS domain charging correlation.
Data Source
AI summary
The present invention discloses a method for providing an online-charging to solve a problem that a related charging can not be processed correctly for a service involving simultaneously a CS domain and an IMS. The method includes: not invoking an online charging for the user in the CS domain when the user, who subscribes for the service involving simultaneously the CS domain and the IMS and the online charging service, originates or terminates a call in the CS domain; and performing the credit control in the CS domain and/or the IMS for the user in the IMS when the call of the user is processed through the IMS. The present invention also discloses a device and a system for an online credit control.