Combinational Call Indicator for CS-PS Session Correlation
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Solution Overview
Problem
Current telecommunications systems face challenges in correlating and managing communication sessions across both circuit-switched (CS) and packet-switched (PS) networks, particularly in delivering conversational voice and multimedia services, where existing CS bearers are used due to insufficient PS capacity, and there is a need to establish a reliable and efficient relation between CS-calls and PS-sessions for enhanced user experience and billing.
Innovation Solution
The method involves using a Combinational Call Indicator (CCI) identifier, in conjunction with the existing Calling Line Identification (CLI) identifier, to correlate and relate CS-calls and PS-sessions, allowing for simultaneous setup and enabling features like rich alerts, seamless multimedia sharing, tariff adaptations, and Quality of Service (QoS) management across different network types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CS bearers are used for delivering conversational voice due to insufficient PS capacity, then voice service reliability is improved, but network resource efficiency deteriorates
Solution Approach 1:
The patent implements dynamic bearer selection that adapts to network conditions. The system monitors PS network capacity and dynamically switches between CS and PS bearers for voice delivery, allowing the network to utilize PS resources when available while falling back to CS bearers when PS capacity is insufficient, thus optimizing both reliability and resource efficiency
2Adaptability or versatility
If correlation means are introduced to relate CS-calls and PS-sessions, then service integration capability is improved, but device complexity increases
Solution Approach 1:
The patent segments the correlation function into distinct modular components: a correlation identifier generator that creates unique identifiers for combined services, a correlation manager that tracks and coordinates CS-calls and PS-sessions, and a service integration module that combines them. This modular segmentation enables sophisticated service integration while keeping individual component complexity manageable
Solution Approach 2:
The patent introduces a correlation manager as an intermediary component that mediates between CS and PS network domains. This mediator maintains correlation tables, manages identifier allocation, and coordinates the interaction between different bearers, thereby enabling service integration without requiring complex direct interactions between all system components
3Adaptability or versatility
If simultaneous CS- and PS-connectivity is supported in user equipment, then service versatility is improved, but terminal complexity increases
Solution Approach 1:
The patent implements multi-radio access bearer functionality that enables user equipment to simultaneously handle both CS and PS connectivity through a unified terminal architecture. The terminal incorporates universal communication interfaces and a dual-mode protocol stack that can operate in both CS and PS modes concurrently, providing service versatility without requiring separate dedicated hardware for each network type
Data Source
AI summary
Combinational networks provide simultaneous connectivity via networks of different network type between user equipment. For communication sessions on different network types, belonging to the same user equipment, a correlation check is enabled by introduction of an identifier denoted as Combinational Call Indicator (CCI). This CCI identifier in combination with the known Calling Line Identity (CLI) identifier enables user equipment and other and network entities to perform a correlation check between ongoing, or to be established, CScalls and PS-sessions. A user equipment, setting up a related communication session, sets the CCI identifier and provides the CCI identifier during the communication session setup towards the receiving user equipment or network entity, which is enabled to check whether the last received communication session is correlated to the earlier established session due to the presence of the CCI identifier.