P-CSCF SIP Tag Filtering for Faster 5G TCP Session Setup
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Solution Overview
Problem
5G telecommunication networks experience high access failure rates during TCP session setup and fallbacks to non-5G networks due to unnecessary signaling delays from provisional acknowledgment messages, leading to dropped calls and inefficient network management.
Innovation Solution
Implementing a P-CSCF with a session in progress communication-oriented filtering module that uses machine learning to analyze access failure rates and automatically filter out provisional response tags from SIP messages, such as 100REL tags, to streamline TCP session setups and fallbacks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If provisional acknowledgment messages are exchanged during TCP session setup, then signaling completeness is improved, but access failure rate increases due to unnecessary signaling delays
Solution Approach 1:
The patent extracts and removes the problematic provisional acknowledgment messages (100REL tags) from the SIP signaling flow during TCP session setup. By taking out these unnecessary messages, the system eliminates the signaling delays that cause access failures while maintaining the essential signaling completeness through alternative means.
Solution Approach 2:
The patent implements a mechanism to skip the exchange of provisional acknowledgment messages during TCP session setup. This allows the signaling process to rush through the critical path more quickly by bypassing the delayed provisional acknowledgment phase, thereby reducing access failure rates while still achieving complete session establishment.
2Stability of the object's composition
If provisional acknowledgment messages are exchanged during fallback operations, then protocol compliance is improved, but network success rate decreases due to signaling delays
Solution Approach 1:
The patent extracts the problematic provisional acknowledgment messages from the fallback operation signaling flow. By removing these messages during fallback operations, the system maintains protocol compliance through alternative compliant means while eliminating the signaling delays that reduce network success rates.
Solution Approach 2:
The patent changes the signaling parameters during fallback operations by modifying which messages are exchanged and their timing. This parameter change allows the system to maintain protocol compliance while avoiding the specific signaling delays caused by provisional acknowledgment messages, thereby improving network success rates.
3Productivity
If automated filtering of provisional response tags is implemented, then network performance is improved, but device complexity increases
Solution Approach 1:
The patent implements a self-service filtering mechanism where the P-CSCF automatically identifies and removes provisional response tags based on predefined criteria. The system serves itself by using its own processing capabilities to filter unnecessary messages without requiring external intervention, thereby improving network performance while keeping the complexity manageable through automation.
Solution Approach 2:
The patent incorporates feedback mechanisms where the P-CSCF monitors network conditions and adjusts the filtering behavior accordingly. This feedback loop allows the system to learn from network performance data and optimize the filtering process, improving network performance while managing complexity through adaptive control rather than static complex rules.
Data Source
AI summary
Techniques, devices, and systems for mitigating access failures associated with setting up transmission control protocol (TCP) sessions between user equipment (UEs) and fifth generation (5G) telecommunication networks (or “5G networks”). The 5G networks can include proxy call session control function (P-CSCF) utilized to monitor access failure rates associated with the 5G networks. The P-CSCFs can modify session internet protocol (SIP) messages by extracting provisional responses supported tags from the SIP messages. Triggering and/or performing of the extracting of the provisional responses supported tags can be performed automatically.