Radio Access Network Scheduling for Extended Reality QoS
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Solution Overview
Problem
Optimal allocation of frequency resources in radio access networks to satisfy strict quality-of-service requirements for multimedia services like extended reality, while optimizing network capacity, remains a challenging problem.
Innovation Solution
A scheduling method that prioritizes user devices with the largest portion of data units already successfully transmitted and those with the smallest remaining transmission delay budget, using a priority metric that considers the number of bits successfully transmitted and the remaining transmission delay budget.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency resources are allocated to maximize network capacity, then system throughput is improved, but quality-of-service requirements for extended reality services may not be satisfied
Solution Approach 1:
The patent changes the scheduling parameter from traditional metrics to a new metric that combines the ratio of successfully transmitted data units with the remaining transmission delay budget. This parameter transformation enables the scheduler to simultaneously consider both network capacity efficiency and QoS requirements, resolving the contradiction between maximizing throughput and satisfying service-level agreements for extended reality services.
Solution Approach 2:
The patent applies different scheduling priorities to different user devices based on their specific QoS requirements and transmission progress. By locally optimizing the scheduling decision for each user device according to its particular situation (remaining delay budget and transmission status), the system achieves both high overall capacity and individual QoS satisfaction.
2Reliability
If transmission delay budget is strictly enforced for all data units, then quality-of-service is improved, but network resource utilization efficiency deteriorates
Solution Approach 1:
The patent applies partial action by prioritizing scheduling for data units that are closer to meeting their transmission requirements. Instead of treating all data units equally, the scheduler focuses resources on those with the best chance of successful transmission within the remaining delay budget, achieving QoS satisfaction for critical data while allowing less critical data to use remaining resources efficiently.
3Reliability
If scheduling prioritizes data units with smallest remaining delay budget, then transmission reliability is improved, but network capacity optimization deteriorates
Solution Approach 1:
The patent transforms the scheduling decision parameter to include both the remaining delay budget and the ratio of successfully transmitted data units. This composite parameter change enables the scheduler to balance between urgent transmissions (small remaining budget) and efficient resource usage (high success ratio), simultaneously improving reliability and maintaining network capacity.
Data Source
AI summary
A scheduling method for use in a radio access network to allocate frequency resources to a user device for the transmission of data units organized in a set of data units is disclosed. The sets of data units are assigned an initial transmission delay budget which decreases over time. The scheduling method includes, at a given transmission time, prioritizing scheduling the user device with the largest portion of data units already successfully transmitted within the set of data units, and prioritizing scheduling the user device which set of data units has the smallest remaining transmission delay budget.