Network Slice Bitrate Exemption for Seamless UE Handover
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Solution Overview
Problem
Existing 5G network slices limit bandwidth when it reaches a predefined value, leading to rejection of new flows or limiting existing traffic, especially during UE mobility.
Innovation Solution
Implement a method and device that allow exemption from bitrate limitations by the AMF, which receives UE-specific maximum bitrate information and determines whether to transmit exemption information to the RAN, using the UDM and PCF for policy association, ensuring seamless mobility and uninterrupted service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If network slice bitrate limitation is enforced to control bandwidth usage, then bandwidth management is improved, but service continuity deteriorates when traffic exceeds the threshold
Solution Approach 1:
The patent applies local quality by differentiating between regular traffic and emergency/critical traffic. The AMF identifies emergency services through cause information in registration requests and applies different bitrate limitation rules: regular traffic is subject to network slice bitrate limits, while emergency traffic receives exemption. This localized differentiation resolves the contradiction by maintaining bandwidth control for normal operations while ensuring service continuity for critical applications.
Solution Approach 2:
The patent implements preliminary action by having the AMF proactively identify and exempt emergency services from bitrate limitations before bandwidth exhaustion occurs. When the AMF receives a registration request with cause information indicating emergency service, it preemptively applies exemption and transmits this information to the RAN, preventing potential service disruption before it happens. This anticipatory approach resolves the contradiction by preparing exemption mechanisms in advance for critical services.
2Productivity
If bitrate threshold is set low to ensure network resource management, then resource efficiency is improved, but service availability deteriorates for critical applications
Solution Approach 1:
The patent applies local quality by creating an exemption mechanism specifically for emergency and critical services while maintaining bitrate thresholds for regular traffic. The AMF examines cause information in registration requests and selectively applies bitrate limitations: low thresholds are enforced for normal services to ensure resource efficiency, while emergency services identified through cause information receive automatic exemption. This localized approach resolves the contradiction by protecting resource efficiency for general traffic while ensuring availability for critical applications.
3Quantity of substance
If network slice bitrate limitation is applied to all services, then bandwidth control is improved, but service flexibility deteriorates
Solution Approach 1:
The patent implements dynamics by making bitrate limitation application conditional rather than static. The AMF dynamically determines whether to apply bitrate limitations based on real-time analysis of cause information in registration requests. For emergency services, the system dynamically switches to an exempt mode, while for regular services, standard bitrate control applies. This dynamic adaptability resolves the contradiction by providing both bandwidth control and service flexibility through context-aware decision-making.
Solution Approach 2:
The patent applies local quality by creating different bitrate control policies for different service types within the same network slice. Rather than applying a uniform limitation to all services, the AMF identifies emergency services through cause information and applies selective exemption. This localized differentiation resolves the contradiction by maintaining bandwidth control for the majority of traffic while providing flexibility and exemption for specific critical services that require higher adaptability.
Data Source
AI summary
A method and device for providing an exemption from a network slice bitrate limitation are provided. A method performed by an access and mobility management function (AMF) in a wireless communication system supporting bitrate limitation for a network slice is provided. The method includes receiving, via a radio access network (RAN) from a user equipment (UE), information a first message including cause information associated with allowable maximum bitrate (MBR) for the UE, and determining, based on the cause information, whether to transmit information related to an exemption of the bitrate limitation to the RAN.