5G NAS Protocol QoS Management via Segmented Session Control
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Solution Overview
Problem
In the 5G communication environment, the separation of mobility management and session management entities from the conventional 4G LTE system poses challenges in managing Quality of Service (QoS) efficiently, particularly when using the NAS protocol for communication.
Innovation Solution
A method involving a UE requesting QoS-related information from the network and transmitting a PDU session modification request message to the SMF to configure a segregation QoS flow, with the SMF responding with an authorized QoS rule, allowing efficient QoS management using the NAS protocol.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mobility management and session management are separated into different entities (AMF and SMF) in 5G, then management functionality and adaptability are improved, but communication complexity and difficulty of managing QoS increase
Solution Approach 1:
The patent applies segmentation by dividing QoS management into distinct components: UE-initiated QoS requests, network validation, and separate handling of mobility (AMF) and session (SMF) management. This modular approach manages complexity while maintaining functional separation.
Solution Approach 2:
The NAS protocol acts as an intermediary layer between the UE and network entities (AMF/SMF), providing standardized communication procedures that simplify interactions despite the separated management architecture. The protocol mediates QoS request exchanges between UE and network.
2Productivity
If QoS management is separated from mobility management in 5G, then QoS management efficiency and adaptability are improved, but the complexity of QoS configuration and control increases
Solution Approach 1:
QoS management is segmented into UE-side QoS parameter configuration and network-side validation/enforcement. The UE prepares QoS requests locally, while the SMF handles authorization and policy enforcement, dividing complexity across system boundaries.
Solution Approach 2:
The UE performs preliminary QoS configuration and request preparation before network validation. By pre-configuring QoS parameters and initiating requests in advance, the system reduces real-time configuration complexity during actual data transmission.
3Adaptability or versatility
If the UE initiates QoS requests using NAS protocol, then QoS management flexibility and responsiveness are improved, but the reliability and security of QoS control may be compromised
Solution Approach 1:
The system implements feedback loops where the SMF validates UE QoS requests against network policies, provides authorization decisions, and enforces approved QoS parameters. This feedback mechanism ensures security and reliability while maintaining UE-initiated flexibility.
Solution Approach 2:
The NAS protocol and SMF act as intermediaries that verify and control UE-initiated QoS requests. The intermediary layer ensures that flexible UE requests are properly validated, authenticated, and authorized before implementation, maintaining security.
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. Disclosed is a method for managing the quality of service (QoS) of a session by using an NAS protocol in a next-generation 5G communication environment.