Uplink Data Prioritization for XR Traffic Latency
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently processing and prioritizing extended reality (XR) traffic, particularly in ensuring fair scheduling and priority allocation for XR traffic with different importance levels.
Innovation Solution
The proposed solution involves a user equipment (UE) that detects uplink data with varying importance levels and triggers buffer status reporting (BSR) accordingly. The UE performs logical channel prioritization (LCP) to allocate resources based on importance levels, ensuring that higher priority data is transmitted first. Additionally, a quality of service (QOS) flow-to-data radio bearer (DRB) mapping rule is implemented to map different importance levels of XR traffic to distinct DRBs, preventing them from being mapped to the same logical channel or radio bearer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If XR traffic with different importance levels is mapped to the same logical channel or radio bearer, then device complexity is reduced, but scheduling fairness and priority allocation are degraded
Solution Approach 1:
The patent segments XR traffic into multiple logical channels based on importance levels (e.g., high importance, medium importance, low importance). Each logical channel is then mapped to a separate radio bearer, ensuring that traffic with different priority requirements is handled independently. This segmentation resolves the contradiction by maintaining scheduling fairness through separate handling while managing complexity through structured organization.
Solution Approach 2:
The patent applies local quality by assigning different QoS parameters, priority levels, and resource allocation rules to different logical channels based on their specific importance levels. High importance XR traffic receives preferential treatment in terms of scheduling priority and resource allocation, while lower importance traffic receives standard treatment. This localized differentiation ensures scheduling fairness without requiring complete system-level complexity.
2Device complexity
If traditional scheduling methods are used for XR traffic, then device complexity is reduced, but latency and performance are degraded
Solution Approach 1:
The patent performs preliminary actions by pre-configuring multiple logical channels with different priority levels and QoS parameters before XR traffic arrives. The network and UE are pre-aware of the importance levels associated with different XR traffic types, allowing immediate appropriate scheduling decisions without complex real-time analysis. This preliminary setup reduces latency while maintaining manageable complexity.
Solution Approach 2:
The patent changes scheduling parameters dynamically based on the importance level of XR traffic. Different logical channels have different priority values, buffer sizes, and resource allocation parameters. When XR traffic with high importance arrives, the system automatically adjusts scheduling parameters to prioritize this traffic, reducing latency without requiring complete reconfiguration of the scheduling mechanism.
3Ease of operation
If all XR traffic is treated uniformly, then ease of operation is improved, but productivity and performance are degraded
Solution Approach 1:
The patent introduces dynamics by allowing the system to automatically adapt traffic handling based on the importance level of incoming XR traffic. The network and UE dynamically select appropriate logical channels and apply corresponding QoS rules without manual intervention. This dynamic behavior maintains ease of operation while significantly improving productivity, as the system automatically optimizes performance based on traffic characteristics.
Data Source
AI summary
Embodiments of the present disclosure relate to a method and apparatus for wireless communication. According to some embodiments of the disclosure, a UE may detect uplink data with a first importance level becoming available to a medium access control (MAC) entity of the UE, wherein the first importance level may identify the relative importance information of the uplink data. The UE may trigger buffer status reporting (BSR) in response to the first importance level satisfying a criterion for triggering the BSR.