Base Station Packet Scheduling Using Dynamic Access Network PDB
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing 5G mobile communication systems face challenges in maintaining end-to-end quality of service (QoS) due to the use of static core network packet delay budgets (CN PDB), which can lead to packet delay times exceeding the defined limits, resulting in QoS degradation.
Innovation Solution
Implementing in-band network telemetry (INT) to measure actual packet delays between the base station and the user plane function (UPF), allowing for dynamic adjustment of access network packet delay budgets (AN PDB) based on core network and data network packet delays, thereby enhancing scheduling accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If static core network packet delay budgets are used, then system complexity is reduced, but packet delay time exceeds defined limits resulting in QoS degradation
Solution Approach 1:
The patent implements dynamic adjustment of access network packet delay budgets based on actual measured packet delay times. The base station continuously monitors packet delays and adjusts the AN PDB parameter dynamically, transitioning from a static to a dynamic system that adapts to real-time network conditions, thereby maintaining QoS reliability without excessive complexity
Solution Approach 2:
The patent establishes a feedback mechanism where the base station measures actual packet delay times and uses this information to adjust the access network packet delay budget. This closed-loop feedback system allows the network to automatically correct QoS deviations by comparing measured delays against targets and adjusting scheduling parameters accordingly
2Measurement precision
If in-band network telemetry is implemented to measure actual packet delays, then QoS accuracy is improved, but device complexity increases
Solution Approach 1:
The patent combines packet delay measurement functionality with the existing in-band network telemetry infrastructure. By integrating delay measurement into the regular packet forwarding path using existing telemetry mechanisms, the system achieves precise measurement capabilities without adding separate dedicated measurement equipment, thus limiting the increase in device complexity
Solution Approach 2:
The base station performs self-measurement of packet delay times by comparing timestamps of received packets from the user plane function with current time. This self-service approach eliminates the need for external measurement devices or complex probe mechanisms, achieving accurate measurement with minimal additional complexity
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a base station in a communication system is provided. The method includes receiving a packet including metadata from a user plane function (UPF), identifying a packet delay budget (PDB) for a quality of service (QoS) flow of the packet, identifying a delay time of the packet based on the metadata, determining an access network (AN) PDB based on the PDB and the delay time, and performing scheduling for transmission of the packet to a terminal based on the AN PDB.