Delay-Aware XR Radio Scheduling With Absolute Sender Time
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Solution Overview
Problem
Current radio resource allocation and scheduling policies for extended reality (XR) multimedia applications are not delay-aware, leading to inaccurate assumptions about remaining delay budgets and failing to meet challenging latency and data rate requirements, particularly in uplink and downlink directions.
Innovation Solution
The technology employs delay-aware scheduling enhancements by leveraging absolute sender time to determine remaining delay budgets for protocol data units (PDUs) and PDU Sets, using RTP header extensions for media-aware scheduling, and implementing delay status reporting (DSR) procedures to dynamically update logical channel prioritization and resource allocation based on timing information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current radio resource allocation policies are used for XR applications, then general communication requirements are met, but delay-aware scheduling is lacking导致remaining delay budgets are inaccurately estimated and latency requirements cannot be satisfied
Solution Approach 1:
The patent implements delay status reporting (DSR) procedures where the UE reports delay timing information to the network entity, which then uses this feedback to dynamically adjust resource allocation and logical channel prioritization, ensuring accurate remaining delay budget estimation and latency requirement satisfaction
Solution Approach 2:
The system performs preliminary delay-aware scheduling by determining remaining delay budgets for PDUs and PDU sets before resource allocation, using absolute sender time and RTP header extensions to proactively plan resource allocation that meets latency requirements
2Reliability
If delay-aware scheduling enhancements are implemented, then latency and data rate requirements are met, but system complexity increases due to additional scheduling procedures and protocols
Solution Approach 1:
The patent extends existing radio resource allocation mechanisms to serve dual purposes: maintaining backward compatibility with general communication requirements while simultaneously providing delay-aware scheduling for XR applications through unified procedures that handle both conventional and XR traffic
Solution Approach 2:
The network entity acts as an intermediary that receives delay timing information from the UE and translates it into appropriate resource allocation decisions, abstracting the complexity of delay-aware scheduling from the UE while maintaining accurate delay budget management
3Reliability
If dynamic resource allocation based on delay timing information is used, then QoS for XR applications is enhanced, but resource allocation overhead increases due to continuous delay status reporting
Solution Approach 1:
The patent implements partial delay status reporting where the UE reports delay timing information selectively based on specific conditions or thresholds, rather than continuously reporting all delay states, thereby reducing signaling overhead while maintaining adequate QoS monitoring for XR applications
Data Source
AI summary
Various aspects of the present disclosure relate to delay-aware scheduling enhancements of radio resource allocation for XR multimedia applications. For example, the apparatuses, systems, and methods described herein can leverage an absolute sender time to determine a remaining delay budget of Protocol Data Units (PDUs)/PDU Sets within XR application traffic. Using the determined remaining delay budgets, the systems and methods can facilitate media-aware and delay-aware radio resource allocation scheduling by a network entity.