Extended Reality QoS Flow Prioritization for Critical Packets
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Solution Overview
Problem
Current 5G systems deliver media services using common quality of service (QoS) mechanisms without considering media information, leading to inefficient packet delivery, especially for extended reality (XR) applications where packet dependencies affect user experience.
Innovation Solution
Enhanced QoS mechanism that classifies XR traffic into primary and secondary QoS flows based on packet importance, allowing the radio access network (RAN) to prioritize and drop less important packets when bit rates exceed thresholds, ensuring critical packets are delivered.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If common QoS mechanisms are used without considering media information, then system simplicity is maintained, but XR packet delivery efficiency deteriorates
Solution Approach 1:
The patent segments XR traffic into multiple QoS flows with different priority levels (first QoS flow for high priority packets, second QoS flow for low priority packets). This segmentation allows differentiated handling of packets based on their importance to XR service quality, improving delivery efficiency without requiring complete redesign of the QoS mechanism.
Solution Approach 2:
The patent applies local quality by assigning different QoS characteristics to different packet types within the same XR service. Critical packets receive higher priority treatment through the first QoS flow with stricter bit rate thresholds, while non-critical packets use the second QoS flow with more lenient thresholds, optimizing overall XR delivery efficiency.
2Reliability
If all packets are treated equally in QoS flows, then implementation simplicity is maintained, but user experience deteriorates due to packet dependencies
Solution Approach 1:
The patent implements preliminary action by classifying and marking packets with different priority levels before they are transmitted through the QoS flows. Packets are pre-categorized into first QoS flow (high priority) or second QoS flow (low priority) based on their importance to XR service, ensuring that critical packets are delivered reliably while allowing non-critical packets to be dropped if necessary.
3Reliability
If bit rate thresholds are strictly enforced for all flows, then QoS guarantees are improved, but network resource utilization deteriorates
Solution Approach 1:
The patent applies partial action by enforcing strict bit rate thresholds only for the first QoS flow carrying critical packets, while the second QoS flow carrying non-critical packets allows exceeding thresholds. This selective enforcement ensures QoS guarantees for essential XR functionality while permitting over-provisioning that improves overall network resource utilization and user experience.
Data Source
AI summary
Presented are systems and methods for quality of service (QOS) handling for extended reality (XR) traffic. A first network entity can determine that a service data flow is transferred via a first Quality of Service (QOS) flow and a second QoS flow. The first network entity can send a first message indicating that at least one packet of the second QoS flow can be dropped when the wireless communication node determines that a sum of a first bit rate of the first Qos flow and a second bit rate of the second QoS flow is greater than a threshold associated with the first QoS flow to a wireless communication node.