XR Split Architecture for Adaptive PDU Session Resource Allocation
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing and optimizing the split architecture of extended reality (XR) applications across diverse network environments, particularly in 5G networks, leading to suboptimal user experiences and resource inefficiencies.
Innovation Solution
The implementation of a flexible and configurable extended reality (XR) split architecture that adapts to varying network conditions, device capabilities, and traffic loads, utilizing modular protocols and adaptive resource allocation to enhance performance and user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed XR split architecture is used, then device compatibility is improved, but adaptability to varying network conditions and device capabilities deteriorates
Solution Approach 1:
The patent implements dynamic selection of split architecture configurations based on real-time network conditions, device capabilities, and traffic loads. The system can adaptively choose between different split options (e.g., split at RLC, PDCP, or SDAP layers) rather than using a fixed architecture, allowing the system to optimize performance for varying conditions while managing complexity through automated decision-making algorithms.
Solution Approach 2:
The system changes architectural parameters dynamically by adjusting which protocol layer functions are performed at the UE versus the network side. This includes modifying resource allocation parameters, buffer management parameters, and processing distribution parameters based on measured network conditions and device capabilities, enabling adaptability without requiring complete architectural redesign.
2Productivity
If resource allocation is optimized for specific conditions, then performance in those conditions is improved, but performance in other conditions deteriorates
Solution Approach 1:
The patent employs dynamic resource allocation strategies that continuously adjust resource distribution between UE and network based on current traffic loads, network conditions, and device capabilities. This includes dynamic buffering, dynamic processing allocation, and dynamic bandwidth allocation, allowing the system to optimize resource utilization for each specific condition while maintaining acceptable performance across diverse conditions through adaptive reconfiguration.
Solution Approach 2:
The system segments resource allocation into multiple independent controllable units at different protocol layers (SDAP, PDCP, RLC, MAC, PHY). This segmentation allows independent optimization of resources at each layer based on specific traffic requirements and network conditions, improving overall resource utilization while maintaining flexibility to adjust individual segment allocations for different conditions.
3Reliability
If XR content delivery is optimized for high quality, then user experience is improved, but network resource consumption increases
Solution Approach 1:
The system dynamically changes quality parameters such as resolution, frame rate, and bitrate based on network conditions and device capabilities. When network resources are abundant, higher quality parameters are used to enhance user experience. When resources are constrained, the system adjusts parameters downward to reduce consumption while maintaining acceptable quality thresholds, optimizing the balance between user experience and resource usage.
Solution Approach 2:
The system implements periodic quality assessment and adjustment cycles, where XR content quality parameters are evaluated at regular intervals and adjusted based on current network conditions. This periodic optimization allows the system to maintain high quality during favorable conditions while reducing resource consumption during challenging conditions, rather than using a static quality level.
Data Source
AI summary
A method can include sending, by a base station central unit control plane (BS-CU-CP) to a base station central unit user plane (BS-CU-UP), a request message that includes a first parameter indicating a protocol data unit (PDU) set content ratio associated with at least one aspect of a PDU session of a wireless device. The method can also include receiving, from the BS-CU-UP, a response message can include a second parameter indicating that the BS-CU-UP supports PDU set content ratio awareness for the at least one aspect of the PDU session.