Presence Gateway Synchronizing Mobile and SIP Systems
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Solution Overview
Problem
Existing presence display systems, including mobile phones and SIP phone systems, face reliability issues due to the need for users to manually notify multiple presence services of changes in their presence status, leading to obstructed system usage and unreliable presence services.
Innovation Solution
A presence display system with a gateway apparatus that synchronizes presence information across multiple systems using a presence conversion table, allowing the presence server to report changes to other systems via the gateway, and utilizing the SIP SUBSCRIBE method for SIP-compliant IP telephone systems to establish and maintain synchronized presence information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If users manually notify multiple presence services of changes in their presence status, then each presence service can be updated, but the system complexity and user burden increase significantly
Solution Approach 1:
The patent introduces a gateway apparatus as an intermediary between the presence display system and other presence services (such as SIP phone systems). The gateway automatically translates and transmits presence information between different systems, eliminating the need for users to manually notify multiple services. This mediator handles the complexity of multi-system integration while ensuring reliable presence information synchronization across all connected services.
2Reliability
If users manually notify multiple presence services of changes in their presence status, then presence information can be updated across services, but the ease of operation deteriorates
Solution Approach 1:
The system implements self-service by enabling automatic presence information synchronization without requiring user intervention. When a user's presence status changes in one system (e.g., mobile phone presence display system), the gateway automatically detects this change and propagates it to other connected presence services (e.g., SIP phone systems). This self-service mechanism ensures reliable presence information across all services while maintaining ease of operation, as users only need to update their presence in one place.
3Device complexity
If presence information is not synchronized across all presence services, then system complexity is reduced, but the reliability and consistency of presence services deteriorate
Solution Approach 1:
The gateway apparatus serves as a central mediator that ensures presence information synchronization across all connected services. It receives presence information from the presence display system and automatically forwards it to other presence services, and vice versa. This intermediary mechanism maintains high reliability and consistency of presence information across systems without requiring complex peer-to-peer synchronization protocols between each service pair.
Solution Approach 2:
The system implements feedback mechanisms where the gateway continuously monitors presence information changes and automatically triggers synchronization actions. When presence information is updated in any connected system, the gateway detects this change and initiates the appropriate synchronization process to other services. This feedback-driven approach ensures reliable and consistent presence information across all services while keeping the system architecture relatively simple and centralized.
Data Source
AI summary
Synchronization of presence information is established between different presence services. Presence information of each user is stored on the presence server 27 of the presence display system comprising mobile phones. Presence information of the SIP phone system comprising the SIP phone 29 and the SIPG/W (enterprise side) 30 is stored in the SIPG/W (enterprise side) 30. When presence information of the presence server 27 has changed, the presence server 27 notifies the SIPG/W (enterprise side) 30 of the change in presence information via the SIPG/W (mobile communication network side) 31. Conversely, when presence information of the SIP phone system has changed, the SIPG/W (enterprise side) 30 notifies the presence server 27 of the change in presence via the SIPG/W (mobile communication network side) 31.