PDU Set QoS Binding for Low-Latency XR Media Flows
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Solution Overview
Problem
Existing 5G communication systems face challenges in efficiently handling PDU Sets for XR and media services due to unclear granularities of QoS parameters, lack of framework for providing additional information with advanced media codecs, and unclear binding of service data flows to QoS flows, leading to inefficient radio resource scheduling.
Innovation Solution
A method in the core network for receiving QoS parameters related to PDU Set handling, performing QoS binding of service data flows to QoS flows, generating a QoS profile with a QoS flow identifier, and transmitting this profile to the radio access network for enhanced PDU Set-based QoS management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple QoS flows are multiplexed to one DRB to improve resource efficiency, then device complexity and resource utilization improve, but QoS parameter granularity and scheduling precision deteriorate
Solution Approach 1:
The patent segments QoS flows by introducing PDU Set as a granular unit, allowing individual PDU Sets within the same QoS flow to be scheduled independently. This segmentation enables fine-grained QoS control at the PDU Set level while maintaining multiplexing of multiple QoS flows over a single DRB, thus resolving the contradiction between resource efficiency and QoS precision.
2Measurement precision
If PDU Set-based handling is implemented to improve QoS management precision, then measurement precision improves, but device complexity and system overhead increase
Solution Approach 1:
The patent implements self-service mechanisms where the UE autonomously identifies PDU Sets and applies QoS handling based on pre-configured rules received from the network. The gNB also performs automatic PDU Set identification and scheduling based on received indicators. This self-service approach enables precise PDU Set-based QoS management without requiring complex centralized control for each PDU Set, thus reducing system overhead while maintaining precision.
3Productivity
If clear binding rules between SDF and QoS flow are established to improve scheduling efficiency, then productivity improves, but adaptability to different service types deteriorates
Solution Approach 1:
The patent implements dynamic binding rules where PDU Sets are identified using flexible indicators (such as RTP sequence numbers, timestamps, or custom indicators) that can be adapted to different service types like XR, video, or audio. The binding between SDF and QoS flow is established through configurable rules that can be dynamically adjusted based on service requirements, enabling both efficient scheduling and high adaptability to diverse service types.
Data Source
AI summary
An entity in a core network (CN) of a wireless communication system receives quality-of-service (QoS) parameters related to protocol data unit (PDU) set based handling of traffic (1602); performs, using the QoS parameters, QoS binding of a service data flow to a QoS flow for a certain media type (1604); generates a QoS profile associated with a QoS flow identifier (QFI) of the QoS flow, and transmits the QoS profile to a radio access network (RAN) via which the UE accesses the CN (1606).