Session Control Server Presence Notification
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Solution Overview
Problem
Conventional systems require client programs on terminals to update and notify presence information, which is not feasible for terminals without such functionality, limiting their ability to receive presence-based services.
Innovation Solution
A control server manages communication sessions between terminal devices and notifies a presence server of status changes, eliminating the need for client programs to update and manage presence information on terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal is equipped with presence information update function, then presence information can be notified and updated, but device complexity increases
Solution Approach 1:
The invention introduces a session control server as an intermediary that performs presence information update operations on behalf of terminals. The server receives presence information from terminals and automatically updates the presence server, eliminating the need for terminals to have complex presence information management functions while ensuring reliable presence information notification
Solution Approach 2:
The session control server provides self-service by autonomously performing presence information updates without requiring client programs on terminals. The server monitors terminal status changes and automatically notifies the presence server, freeing terminals from the burden of implementing presence information management functionality
2Reliability
If client programs are installed on terminals to manage presence information, then presence information can be updated, but ease of operation decreases
Solution Approach 1:
The session control server acts as an intermediary that handles presence information management tasks, allowing terminals to operate simply without installing or configuring client programs. The server manages the complexity of presence information updates while terminals maintain operational simplicity
Solution Approach 2:
The invention extracts the presence information management function from the terminal and relocates it to the session control server. This separation allows terminals to remain simple communication devices while the server handles the complex presence information management operations
Data Source
AI summary
A network system includes a session control server and a presence server. The session control server includes a presence information update unit that is started when the status changes and notifies the presence server of the changed status. The presence server includes a presence information control unit that controls the consistency of the notified update information.