SIP Session Setup Suspension for Charging Control
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Solution Overview
Problem
Current SIP communication networks lack mechanisms for users to control session setup after receiving charging-related information, leading to inadequate control over supplementary services like Advice of Charge, Reverse Charging, and Terminating Identification Presentation in Packet Switched networks.
Innovation Solution
Implementing a precondition framework that allows session setup to be suspended until supplementary services are provided, enabling users to confirm or reject session establishment based on charging information or identity presentation, using signaling messages with preconditions defined in Session Description Protocol (SDP) offers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If session setup is allowed to proceed immediately in SIP networks, then communication speed and efficiency are improved, but user control over supplementary services like charging information and identity verification is lost
Solution Approach 1:
The patent implements preliminary action by requiring that supplementary services (such as charging information provision and identity verification) be completed before the session setup is finalized. The signaling message includes an indication that session setup shall be suspended until the supplementary service is provided, ensuring users receive necessary information beforehand and can make informed decisions about proceeding with the communication session.
2Ease of operation
If session setup is suspended until supplementary services are provided, then user control and informed decision-making are improved, but communication establishment time increases
Solution Approach 1:
The patent applies dynamics by making the session setup process adaptive and conditional. The suspension of session setup is not absolute but controlled through signaling messages that indicate whether suspension is required. The system dynamically adjusts the session establishment flow based on the specific supplementary service requirements and user preferences, allowing flexibility in balancing control and time efficiency.
3Reliability
If charging information and identity verification are provided before session setup, then service reliability and user awareness are improved, but system complexity increases
Solution Approach 1:
The patent implements segmentation by dividing the session establishment process into distinct phases: supplementary service provision phase and session setup completion phase. The signaling message structure is segmented to include separate fields for supplementary service requests, suspension indications, and confirmation mechanisms. This modular approach allows each component to be handled independently, managing system complexity while ensuring reliable service provision.
Data Source
AI summary
The invention provides a system, method, network elements, and computer program products, for providing a supplementary service such as an advice of charge, AoC, service requested by a user equipment at a session set-up or during a session of a communication service. For setting up a session of the communication service, a signalling message may be transmitted or received which signalling message comprises a request for a supplementary service and an indication on whether the session setup is to be suspended until said supplementary service has been provided. When detecting that said setting up the session of the communication service is to be suspended until said supplementary service has been provided, the session setup is suspended until after the requested supplementary service has been provided. The setting up of the session is resumed after determining that said supplementary service has been provided.