RAN QoS Scheduling for Coordinated Multi-Flow XR Traffic
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Solution Overview
Problem
Existing 5G NR systems face challenges in efficiently managing diverse quality of service (QoS) requirements for different traffic flows, particularly in supporting high-capacity and low-latency applications like virtual and augmented reality, which require stringent radio performance and power efficiency.
Innovation Solution
A radio access network node facilitates the transmission of protocol data units based on relative quality of service criteria, prioritizing traffic flows by receiving quality information that includes related traffic flow indications and independent quality of service criteria, allowing for adaptive QoS management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional independent quality of service criteria are applied to each traffic flow, then each flow can be managed separately, but related traffic flows cannot achieve coordinated priority management for multi-modal XR applications
Solution Approach 1:
The patent segments quality of service management into two independent components: independent QoS criteria (in-qoS) for individual traffic flows and relative QoS criteria (r-qoS) for related flow groups. This segmentation allows each component to be handled separately while achieving coordinated management, resolving the contradiction between adaptability and complexity.
Solution Approach 2:
The patent adds a new dimension to QoS management by introducing relative quality of service criteria that operate alongside traditional independent criteria. This dimensional extension enables coordinated priority management across related traffic flows without replacing the existing independent management mechanism, thus improving adaptability while maintaining manageable complexity.
2Reliability
If stringent latency and reliability criteria are applied to all traffic flows, then XR application performance is improved, but network resource utilization efficiency decreases
Solution Approach 1:
The patent applies local quality by differentiating QoS requirements between traffic flow types. Related traffic flows (e.g., video and audio streams) receive coordinated relative QoS treatment with optimized latency, while unrelated background traffic flows are managed with standard independent QoS criteria. This localized differentiation ensures high reliability for critical XR traffic without unnecessarily consuming network resources across all traffic types.
Solution Approach 2:
The patent implements partial action by applying stringent relative QoS criteria only to related traffic flows that require coordinated delivery, rather than uniformly applying high reliability requirements to all traffic. This selective application maintains high reliability for XR applications while improving overall network resource utilization efficiency.
3Ease of operation
If traffic flows are prioritized based on independent quality of service criteria, then individual flow requirements are met, but the immersive experience of multi-modal XR applications deteriorates due to lack of coordination between related flows
Solution Approach 1:
The patent merges independent QoS criteria and relative QoS criteria into a unified enforcement mechanism at the radio access network node. The combined mechanism processes both in-qoS and r-qoS parameters together, enabling coordinated priority management that simultaneously satisfies individual flow requirements and maintains the immersive XR experience through synchronized delivery of related traffic flows.
Data Source
AI summary
A radio access network node is configured with a relative quality-of-service criterion corresponding to a target traffic flow and a related traffic flow. The node may schedule, for transmission to a user equipment, a packet corresponding to the target flow based on the relative quality-of-service criterion. The quality-of-service criterion may be indicated by core network equipment in an indication that may accompany the packet corresponding to the target flow, which may be a downlink flow. The quality-of-service criterion may be indicated by a user equipment in an indication that may accompany the packet corresponding to the target flow, which may be an uplink flow. The user equipment may receive, from the node, a packet of the target flow via a shareable semi-persistent downlink scheduling occasion resource without waiting for a grant of the resource from the node.