Dynamic Packet Delay Budget for 5G QoS Scheduling
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Solution Overview
Problem
Existing wireless communication technologies face challenges in accurately managing network resource allocation due to unpredictable packet delays, which affect quality of service (QoS) as network load changes, especially in next-generation networks like 5G, where complex user equipment and increasing data volumes require precise delay budgeting.
Innovation Solution
A dynamic packet delay budget (PDB) is calculated at the User Plane Function (UPF) or Next Generation Radio Access Network (NG-RAN) to derive an Access Network PDB, ensuring accurate delay estimation by incorporating time synchronization methods and timestamp calculations to adjust scheduling based on real-time network conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a static packet delay budget is used for network resource allocation, then the system complexity is reduced, but the quality of service accuracy deteriorates under varying network loads
Solution Approach 1:
The patent implements dynamic packet delay budget adjustment by continuously monitoring network load conditions and modifying the PDB parameter accordingly. The system transitions from a static to a dynamic configuration where the delay budget adapts to real-time network conditions, resolving the contradiction between system simplicity and QoS accuracy.
Solution Approach 2:
The patent changes the packet delay budget parameter based on network load conditions. By adjusting this critical QoS parameter dynamically, the system maintains accurate service quality metrics without requiring complete redesign of the resource allocation framework, thus balancing complexity and precision.
2Measurement precision
If dynamic packet delay budget calculation is implemented, then the quality of service accuracy is improved, but the processing complexity increases
Solution Approach 1:
The patent establishes predetermined rules and thresholds for dynamic PDB adjustment before actual network operation. By pre-configuring the adaptation logic and decision criteria, the system reduces real-time processing complexity while maintaining dynamic QoS accuracy during runtime.
3Measurement precision
If time synchronization methods are used for accurate timestamp calculation, then the delay budget precision is improved, but the network infrastructure complexity increases
Solution Approach 1:
The patent introduces time synchronization mechanisms as an intermediary layer between network nodes. By implementing standardized timestamping and synchronization protocols, the system achieves precise delay measurement without requiring complex custom solutions at each node, thus managing infrastructure complexity while improving precision.
Data Source
AI summary
A packet delay budget (“PDB”) improves quality of service (“QoS”) by providing an accurate delay of packets over a network. PDB includes an access network PDB (“AN PDB”) and a core network PDB (“CN PDB”). Because the PDB can change based on network load, the PDB value is more accurate when the CN PDB is dynamically determined. The dynamic CN PDB can be calculated at the basestation or at the user plane function (“UPF”) and an indication of the dynamic PDB indication can be sent between the basestation and/or the UPF.