5G User Equipment LADN Connectivity Control
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Solution Overview
Problem
The implementation of connectivity to a local area data network (LADN) in a 5G system is unclear, lacking specific procedures or functions to effectively support this feature.
Innovation Solution
A user equipment and communication control method are developed to provide connectivity to an LADN in a 5G system, involving the registration procedure, PDU session establishment, and management of LADN information, enabling the UE to support and utilize LADN services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If LADN connectivity function is implemented in 5GS, then service diversity and adaptability are improved, but system architecture complexity and procedure complexity increase
Solution Approach 1:
The patent segments the LADN connectivity function into distinct procedural components: registration procedure for LADN information acquisition, PDU session establishment procedure for LADN connectivity, and session management procedures. This segmentation allows each component to be independently defined and managed, reducing overall system complexity while maintaining service diversity.
Solution Approach 2:
The patent implements preliminary action by establishing LADN information provision and storage mechanisms during the registration procedure before actual LADN connectivity is needed. The UE stores LADN information (DNN, S-NSSAI, LADN service area) in advance, so that when LADN connectivity is required, the session establishment can proceed efficiently using pre-configured parameters.
2Reliability
If LADN information provision and storage is implemented in UE, then LADN connectivity is improved, but information management complexity and storage requirements increase
Solution Approach 1:
The patent makes the UE's information storage mechanism universal by using the existing subscription data storage structure to accommodate LADN information. The UE stores LADN DNN, S-NSSAI, and LADN service area information in the same data structures used for other subscription data, eliminating the need for separate specialized storage mechanisms and reducing information management complexity.
Solution Approach 2:
The patent implements feedback mechanisms where the UE reports stored LADN information to the network during PDU session establishment requests. The network validates and confirms the LADN information, providing feedback that ensures data integrity. This feedback loop maintains reliable LADN connectivity while keeping information management straightforward through validation protocols.
3Ease of operation
If PDU session establishment for LADN is implemented, then connectivity functionality is improved, but procedure complexity and signaling overhead increase
Solution Approach 1:
The patent merges the LADN session establishment procedure with the existing PDU session establishment framework. The UE includes LADN information (DNN, S-NSSAI, LADN service area) in the standard PDU session establishment request message, and the network processes it using existing PDU session management procedures. This merging avoids creating a separate complex LADN-specific establishment procedure while maintaining ease of operation.
Solution Approach 2:
The patent makes the PDU session establishment procedure universal by enabling it to handle both regular PDU sessions and LADN-specific PDU sessions through the same message structures and processing logic. The network device determines whether a PDU session is for LADN based on the included LADN information, allowing a single procedure to serve multiple functions without increasing complexity.
Data Source
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AI summary
The present invention provides a communication means that enables use of a function for providing connectivity to a local area data network (LADN) in a 5G system (5GS). Furthermore, the present invention provides a communication means that enables use of a function for providing connectivity to an LADN between a user equipment and a network when the use of the function for providing connectivity to an LADN is enabled.