Multiple PDN Detach for Concurrent UE Connections
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Solution Overview
Problem
Current wireless telecommunications systems lack efficient mechanisms for user equipment (UE) to detach from multiple packet data network (PDN) gateways, leading to complexities in managing concurrent connections and switching between different network services.
Innovation Solution
The system provides procedures for UE-initiated, MME-initiated, and HSS/AAA-initiated detachment from multiple PDN gateways, involving message exchanges between the UE, Mobility Management Entity (MME), Serving Gateway, and PDN Gateways to manage bearers and release connections efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional wireless telecommunications systems are used without multiple PDN detach mechanisms, then the system structure remains simple, but the ability to manage concurrent connections and switch between network services efficiently deteriorates
Solution Approach 1:
The patent segments the detach process into multiple independent detach requests, each targeting a specific PDN gateway. Instead of managing all PDN connections as a single unit, the system allows individual detachment from each PDN gateway through separate detach procedures. This segmentation enables flexible management of concurrent connections while maintaining a relatively simple overall system structure.
Solution Approach 2:
The patent implements a universal detach mechanism that can be applied to multiple PDN gateways using the same detach request format and processing logic. The Mobility Management Entity (MME) handles detach requests for different PDN gateways through a standardized procedure, making the system multi-functional without requiring separate specialized mechanisms for each PDN connection.
2Adaptability or versatility
If multiple PDN gateways are connected simultaneously, then service flexibility improves, but the complexity of managing bearers and connections increases
Solution Approach 1:
The patent divides the connection management into separate bearer contexts for each PDN gateway. Each bearer context is independently managed and can be detached separately. This segmentation allows the system to maintain multiple concurrent connections with different service characteristics while simplifying the management of each individual connection through standardized procedures.
Solution Approach 2:
The patent establishes bearer contexts in advance for each PDN gateway before actual data transmission begins. These pre-configured bearer contexts include all necessary parameters and identifiers needed for connection management. When detachment is required, the system can quickly reference and process the pre-established bearer contexts without complex real-time calculations.
3Ease of operation
If detachment from multiple PDN gateways is implemented, then user experience improves through seamless switching, but the message exchange and processing overhead increases
Solution Approach 1:
The patent combines multiple detach operations into a unified detach request message that can handle multiple PDN gateways simultaneously. Instead of requiring separate message exchanges for each PDN gateway detachment, the system merges the detach requests into a single standardized message format, reducing the overall message exchange overhead while maintaining seamless detachment capability.
Solution Approach 2:
The patent uses standardized message templates and repeated processing patterns for handling detach requests across multiple PDN gateways. The same detach request format and processing logic are copied and applied to each PDN gateway, reducing the complexity of message exchange and enabling efficient batch processing of detach operations.
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 each of the plurality of PDN gateways to which the UE has at least one active bearer. The message requests that at least one of the plurality of PDN gateways delete the at least one active bearer.