Tracking Area Allocation for 5G Service Continuity
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Solution Overview
Problem
The existing 5G network architecture lacks a clear definition of the allowed area for User Equipment (UE) in cellular communications networks, which affects mobility and service continuity, as the Mobility class only defines the size of the area without specifying where the UE can receive services, leading to potential misuse and operational challenges.
Innovation Solution
The proposed solutions involve pre-configuration of allowed areas in the subscription database, dynamic and temporary definition by the UE, and user-driven configuration of tracking areas, allowing for static and dynamic allocation of tracking areas within the allowed area, with mechanisms to prevent misuse and ensure accurate area definitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the Mobility class only defines the size of the allowed area without specifying where the UE can receive services, then the area coverage is simplified, but service continuity and mobility management become problematic
Solution Approach 1:
The allowed area is segmented into multiple tracking areas (TAs), where the UE can be registered in one or more TAs within the allowed area. This segmentation allows the network to precisely control service availability in specific geographic regions while maintaining overall area management simplicity.
Solution Approach 2:
The allowed area definition is made dynamic through multiple allocation modes: pre-configured TAs, dynamic TA allocation based on UE movement, and user-driven configuration. This dynamic approach ensures service continuity while adapting to different mobility scenarios and user needs.
2Reliability
If pre-configuration of allowed areas is implemented in the subscription database, then service restrictions are enforced, but operational burden increases
Solution Approach 1:
Instead of requiring complete pre-configuration of all TAs for all UEs, the system implements partial pre-configuration where only necessary TAs are pre-defined. The remaining TAs are allocated dynamically based on actual network conditions and UE behavior, reducing operational burden while maintaining enforcement capability.
3Adaptability or versatility
If dynamic and temporary definition of allowed areas by UE is allowed, then flexibility in service provision is improved, but area definition accuracy may deteriorate
Solution Approach 1:
The system implements feedback mechanisms where the network validates and confirms UE-defined allowed areas. The network node receives the UE's area definition, verifies it against network policies and subscription data, and provides confirmation or correction. This feedback loop ensures both flexibility in UE participation and accuracy in final area definition.
4Reliability
If mechanisms to prevent misuse are implemented, then network security is improved, but system complexity increases
Solution Approach 1:
The system implements preliminary validation of UE requests and area definitions before they are fully processed. Subscription data is pre-checked against policy rules, and potential misuse patterns are detected early in the area definition process. This preliminary action prevents security issues while keeping the overall system relatively simple.
Data Source
AI summary
Disclosed herein is a method of operation of a network node and a network node for executing the method to enable definition of an allowed area in which data services are provided to a wireless device, the allowed area having a size defined by one or more criteria comprising a predefined maximum number of tracking areas within the allowed area, the method comprises: upon attachment of the wireless device, accepting registrations of new tracking areas for the allowed area of the wireless device as long as the one or more criteria that define the size of the allowed area are satisfied.