Multiple PDN Gateway Detachment via MME Coordination
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Solution Overview
Problem
Current wireless telecommunications systems face challenges in efficiently detaching user equipment (UE) from multiple packet data network (PDN) gateways, particularly when concurrent connections are established, leading to complexities in managing bearers and maintaining connectivity.
Innovation Solution
A method and system for detaching a UE from multiple PDN gateways via a serving gateway, involving message exchanges to deactivate bearers and manage detach procedures, including UE-initiated, MME-initiated, and HSS/AAA-initiated detach processes, ensuring seamless connection management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE maintains concurrent connections to multiple PDN gateways, then network service versatility and user experience are improved, but detachment management complexity and risk of connection failures increase
Solution Approach 1:
The patent merges multiple detach operations into a single standardized detach procedure. When a UE detaches from one PDN gateway, the network automatically manages detachment from all other PDN gateways simultaneously through coordinated message exchanges between the MME, serving gateway, and multiple PDN gateways. This consolidation reduces management complexity while maintaining the ability to handle multiple concurrent connections.
Solution Approach 2:
The MME acts as an intermediary that coordinates the detach process across multiple PDN gateways. Rather than requiring separate detach procedures for each gateway, the MME receives the detach request and orchestrates the detachment across the entire network infrastructure, including notifying all relevant PDN gateways and updating bearer states systematically.
2Reliability
If standardized detach procedures are implemented across multiple PDN gateways, then detach failure rates are reduced and network stability is improved, but signaling message exchanges and processing overhead increase
Solution Approach 1:
The system performs preliminary actions by maintaining updated bearer state information and connection maps in the MME and serving gateway before detach is requested. This pre-established knowledge allows the network to efficiently identify all affected PDN gateways and coordinate their detachment without requiring extensive real-time signaling exchanges, thus reducing message overhead while ensuring reliable detachment.
3Productivity
If concurrent bearers are maintained across multiple PDN gateways, then service continuity and user experience are improved, but resource management complexity and detach coordination difficulty increase
Solution Approach 1:
The detach procedure incorporates feedback mechanisms where the MME tracks bearer states across all PDN gateways and adjusts the detachment coordination accordingly. As bearers are deactivated and connections are terminated, the system receives acknowledgments and updates its state information, enabling intelligent coordination that simplifies the detach process while maintaining service continuity where appropriate.
Data Source
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AI summary
A system is provided that includes a component configured to promote detachment of a user equipment (UE) from a plurality of packet data network (PDN) gateways by sending a message to the plurality of PDN gateways to detach multiple PDN connections associated with the UE.