Data Radio Bearer Scheduling Using PSI-Weighted Delay Metrics
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Solution Overview
Problem
Existing techniques for scheduling data radio bearers (DRBs) in communication networks fail to consider PDU set importance values (PSI) when determining prioritization and scheduling, leading to lower priority downlink data packets being undesirably prioritized over higher priority packets due to an 'oldest data packet bias'.
Innovation Solution
Implement a communication manager component that determines and manages scheduling of data radio bearers (DRBs) in communication networks, which incorporates a communication manager component that determines scheduling of data radio bearers (DRBs) based on both packet delay metrics and PDU set importance values (PSI) using a flexible weight table to prioritize higher importance data packets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If scheduling is based on oldest data packet bias, then simple packet handling is achieved, but priority-based service quality deteriorates
Solution Approach 1:
The patent changes the scheduling parameter from time-based (oldest packet) to priority-based (PDU set importance values). The scheduler uses PDU set importance values (PSI) and packet delay metrics to determine scheduling decisions, transforming the scheduling criterion from temporal to priority-based, thereby resolving the contradiction between simplicity and priority service quality.
Solution Approach 2:
The patent introduces PDU set importance values (PSI) as an intermediary parameter between packet arrival and scheduling decisions. This intermediary mechanism allows the system to maintain simple packet handling while achieving priority-based service quality through the mediation of PSI values that capture packet importance without complicating the overall scheduling architecture.
2Reliability
If PDU set importance values are considered in scheduling, then priority-based service quality is improved, but scheduling complexity increases
Solution Approach 1:
The patent segments the scheduling decision into independent components: PDU set importance values (PSI), packet delay metrics, and scheduling logic. This segmentation allows the system to consider priority information without creating a monolithic complex scheduler, as each component can be processed independently and combined through simple scheduling rules.
Solution Approach 2:
The patent makes the scheduling mechanism universal by using a unified approach that handles both high-priority and low-priority packets through the same PSI-based framework. The scheduling logic remains consistent across different packet types, avoiding the need for separate handling mechanisms for different priority levels and thereby reducing overall system complexity.
3Device complexity
If all packets are treated equally, then system simplicity is maintained, but quality of service deteriorates
Solution Approach 1:
The patent applies local quality by treating different packets differently based on their PDU set importance values. Instead of uniform treatment, the system assigns different scheduling priorities to packets with different PSI values, allowing high-priority packets to receive preferential treatment while maintaining simple overall system architecture through localized differentiation.
Data Source
AI summary
Scheduling of downlink communication of data associated with DRBs can be managed and enhanced. Communication manager component (CMC) can determine respective DRB delay metrics associated with respective DRBs associated with a device based on respective priority levels and respective packet delay metrics associated with respective downlink data packets associated with the respective DRBs. CMC can determine respective smallest packet delay metrics associated with respective priority levels and respective DRBs based on respective remaining packet delay budgets of respective downlink data packets. CMC can apply respective weight values associated with the respective priority levels to the respective smallest packet delay metrics. For each DRB, CMC can determine the DRB delay metric of the DRB based on the smallest weighted packet delay metric associated with the DRB. CMC can prioritize communication of downlink data packets associated with DRB determined to have smallest DRB delay metric over other DRBs.