Local Area PDN Connection Management in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing and maintaining Local Area (LA) Packet Data Network (PDN) connections, particularly in establishing, maintaining, and releasing connections due to limited communication resources and the need for advanced services like multimedia services.
Innovation Solution
The method and apparatus for managing LA PDN connections involve receiving and updating subscription information, determining current location information, and initiating procedures for establishing, maintaining, and releasing connections through User Equipment (UE), Mobility Management Entity (MME), and Base Station (BS) communication, ensuring seamless handovers and reconnections within the LA PDN context.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDN connections are established and maintained in local area wireless communication systems, then service quality and data transmission reliability are improved, but device complexity and resource management overhead increase
Solution Approach 1:
The patent segments the PDN connection management into distinct states (established, suspended, released) and separate handling procedures for different scenarios (handover, detachment, reattachment). This segmentation allows the system to manage complexity by treating different connection states and transition scenarios independently, while maintaining overall reliability through state-aware management.
Solution Approach 2:
The patent implements preliminary actions by maintaining PDN connection context information in suspended state during handovers and detachments, rather than establishing new connections from scratch. The system prepares and preserves connection parameters, authentication information, and bearer contexts in advance, enabling faster reconnection and reducing management overhead while ensuring reliable service continuity.
2Stability of the object's composition
If location-based PDN connection management is implemented, then service continuity during handover is improved, but information processing requirements and system overhead increase
Solution Approach 1:
The patent applies local quality by maintaining PDN connection context and location information specifically at the MME level for local area handovers, rather than requiring centralized processing for all scenarios. This allows location-based connection management to be implemented efficiently for local movements while reducing overall information processing overhead by handling matters locally when possible.
Solution Approach 2:
The patent uses copying by preserving and replicating PDN connection context information across different MMEs during handover procedures. Instead of re-establishing connections or retrieving all information from central repositories, the system copies relevant connection parameters, bearer contexts, and subscription information to the target MME, reducing information processing overhead while ensuring service continuity.
3Loss of time
If PDN connection context is maintained during handover, then reconnection speed is improved, but memory usage and resource consumption increase
Solution Approach 1:
The patent extracts and maintains only the essential PDN connection context information needed for rapid reconnection, such as bearer contexts, authentication parameters, and subscription data, while discarding or suspending less critical information. This selective extraction allows the system to reduce memory resource consumption while still achieving fast reconnection speeds by having the necessary information readily available.
Solution Approach 2:
The patent implements dynamic resource management by adjusting the amount and type of PDN connection context maintained based on the current system state, user activity, and resource availability. Connection contexts can be suspended during idle periods, fully maintained during active service, or selectively retained based on priority, allowing the system to optimize the balance between reconnection speed and memory resource consumption dynamically.
Data Source
AI summary
A method and an apparatus for providing, setting, maintaining, and releasing a packet data network (PDN) connection on the basis of a local area in a wireless communication system are provided. The method includes receiving the PDN subscription information on the basis of the local area from a business operator server, inspecting whether the current location information for the terminal exists in the PDN subscription information on the basis of the local area, and starting a procedure for setting the PDN on the basis of the local area when the current location information exists therein.