Transit Server Mediating Cross-Domain Session Establishment
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Solution Overview
Problem
Establishing real-time communication sessions between subscribers of separately administered subsystems in a cellular network is challenging due to the conservative sharing of subscriber information and the need for close cooperation between competing network operators, which is difficult to implement without altering existing network specifications or introducing new mechanisms.
Innovation Solution
A method and system that associate a transit server with subscriber information to facilitate session establishment by querying subscriber-related information through a transit server, allowing operators to maintain control over their network elements and minimizing alterations to existing systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If subscriber information is shared between separately administered subsystems to enable session establishment, then connectivity between subscribers of different administrative domains is improved, but network operator control and information security are compromised
Solution Approach 1:
The patent introduces an address server as an intermediary component that mediates between subscribers of different administrative domains. Instead of direct information sharing between operators, the address server receives session initiation requests, queries subscriber information from the appropriate administrative domain using standardized interfaces, and facilitates connection establishment. This intermediary approach enables cross-domain connectivity while preserving operator control and information security, as no operator needs to directly share sensitive subscriber data with another operator.
2Adaptability or versatility
If existing network specifications are altered to facilitate session establishment between separate subsystems, then interoperability is improved, but system complexity and implementation difficulty increase
Solution Approach 1:
The patent implements a universal address server that can handle session initiation requests from multiple different administrative domains using standardized interfaces. The address server is designed to work with existing PoC system specifications while accommodating subscribers from different operators and administrative domains. This multi-functional approach enables interoperability without requiring alterations to existing network specifications or substantial changes to deployed systems, thereby avoiding increased complexity while achieving cross-domain connectivity.
3Adaptability or versatility
If new session establishment mechanisms are introduced to enable cross-domain communication, then connectivity is improved, but deployment cost and implementation time increase
Solution Approach 1:
The patent employs preliminary action by implementing a standardized address server interface and subscription information query mechanism in advance. The address server is pre-configured with the capability to query subscriber information from different administrative domains using established standardized interfaces. This preliminary preparation allows existing PoC systems to achieve cross-domain connectivity without requiring costly retrofits or complex implementation processes, as the foundational infrastructure is already in place according to standardized specifications.
Data Source
AI summary
A solution for establishing a session of a real-time media communication service in a communication system comprising at least two separately administered subsystems. The session establishment comprises receiving a request for session initiation, querying subscriber information related to the requested session, and initiating the session according to the queried subscriber information. The invented method comprises detecting that the terminating subscriber does not belong to the same subsystem as the originating subscriber, determining a defined transit server associated with the terminating subscriber, said transit server having access to a subscriber database of the subsystem of the terminating subscriber, and querying subscriber information related to the requested session with a first control message comprising parameters of the requested session to the transit server. The solution allows a connection to be established between users of a real-time media communication service for subscribers of separate administrative subsystems so that operators of each subsystem may possess full control of their own network elements, and the internal connection establishment procedures need minimal alterations for the functionality.