S-CSCF Registration Notification for AS State Awareness
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Solution Overview
Problem
Current multimedia communication systems fail to timely notify Application Servers (AS) of user registration states, preventing timely provision of newly subscribed or activated services due to lack of registration event notification subscription from the Serving-Call Session Control Function (S-CSCF).
Innovation Solution
A method and system where the S-CSCF receives new service profile information from the Home Subscriber Server (HSS) and sends registration information to the corresponding AS, and the AS subscribes for registration event notifications when changes are detected in the service profile, ensuring timely notification of user registration states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the S-CSCF does not subscribe for registration event notification, then the system structure remains simple, but the AS cannot obtain user registration state timely
Solution Approach 1:
The patent implements a feedback mechanism where the S-CSCF subscribes for registration event notifications from the HSS and forwards these notifications to the AS. This ensures that when a user registers or deregisters, the AS receives timely feedback about the user's registration state, resolving the information loss problem without requiring complex direct monitoring mechanisms between all components.
Solution Approach 2:
The S-CSCF acts as an intermediary that receives registration event notifications from the HSS and relays them to the AS. This intermediary approach allows the AS to obtain user registration state information indirectly through the S-CSCF, avoiding the need for direct complex interactions between the AS and HSS while ensuring timely information delivery.
2Productivity
If the AS waits for user registration changes without active subscription, then the system operation is simple, but service provision is delayed
Solution Approach 1:
The S-CSCF performs preliminary action by subscribing for registration event notifications in advance and maintaining the subscription state. This ensures that when user registration changes occur, the notification is immediately forwarded to the AS without delay, enabling timely service provision while the subscription mechanism itself remains operationally simple.
Solution Approach 2:
The patent establishes continuous notification delivery where the S-CSCF maintains an active subscription for registration events and continuously monitors for changes. When registration state changes occur, the system continuously delivers notifications to the AS, ensuring uninterrupted and timely service provision without requiring complex operational procedures.
Data Source
AI summary
Disclosed is a method for notifying the state of a user to an Application Server (AS), including: receiving, by a Serving-Call Session Control Function (S-CSCF), new service profile information of the user sent from a Home Subscriber Server (HSS) when the user's service profile changes; and sending, by the S-CSCF, registration information of the user to the AS. The disclosure also relates to a system for notifying the state of a user to an AS, the system including an HSS, an S-CSCF and the AS. The disclosure also provides a corresponding S-CSCF, a system for notifying the state of a user to an AS, and a corresponding AS. According to the invention, an AS may obtain the registration state of a user timely.