Tethering Event Detection in 5G Network Functions
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Solution Overview
Problem
Current 3GPP specifications do not provide mechanisms for controlling tethering events in mobile networks, leading to challenges in managing tethering traffic, enforcing quality of service, and applying appropriate charging and access control policies.
Innovation Solution
The proposed solution involves extending the N7 and N4 interfaces to enable the detection and reporting of tethering events, allowing for dynamic enforcement of policies related to tethering traffic, such as limiting the number of tethered devices, applying different quality of service policies, and charging policies based on the type of device and number of devices tethered.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If tethering control mechanisms are implemented, then network traffic management capability is improved, but device complexity and configuration complexity increase
Solution Approach 1:
The patent introduces a PCF (Policy Control Function) as an intermediary component that centralizes tethering policy management. The PCF receives tethering detection information from UPF and SMF, processes policy decisions, and manages charging rules. This intermediary architecture improves network traffic management capability by providing centralized control while reducing configuration complexity by abstracting policy management from individual network elements.
2Adaptability or versatility
If tethering detection and reporting mechanisms are added, then network operator control capability is improved, but signaling requirements and system complexity increase
Solution Approach 1:
The patent extends existing N4 and N7 interfaces to support tethering detection and reporting functions. The UPF and SMF components are enhanced to perform both traditional packet forwarding/session management and new tethering detection/reporting functions. This multi-functionality approach improves network operator control capability without significantly increasing signaling requirements, as the same interface infrastructure is reused for multiple purposes.
3Productivity
If differentiated policies are applied to tethering traffic, then network resource optimization is improved, but policy management complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the UPF detects tethering events and reports them to the PCF, which then applies differentiated policies based on the reported information. The system continuously monitors tethering status and dynamically adjusts policy enforcement. This feedback loop enables network resource optimization through differentiated policy application while managing policy management complexity through automated decision-making based on real-time network conditions.
Data Source
AI summary
Embodiments described herein relate to methods and apparatuses for obtaining information relating to tethering events. A method performed at a first network function for obtaining information relating to tethering events includes receiving, from a second network function, a first request to report information either related to detected tethering events in a session or related to detected tethering events for one or more services in a session; detecting a first tethering event at a first device; and transmitting a first message to the second network function, the first message including tethering information related to the first tethering event.