PDU Set Handling for XR Traffic Scheduling in 5G Sessions
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Solution Overview
Problem
Existing methods struggle to effectively process downlink/uplink traffic for metaverse and extended reality applications by considering the service characteristics of each packet, leading to network congestion, and lack a systematic approach for handling packets with different media types within a single service flow.
Innovation Solution
A method and apparatus that generate PDU set information based on service characteristics, using real-time transport protocol and network adaptation layer unit header information to classify packets, and provide scheduling based on this information to manage network congestion and optimize traffic handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If packets of different media types are transmitted through a single service flow, then transmission efficiency is improved, but processing complexity increases due to lack of systematic classification
Solution Approach 1:
The patent segments packets into PDU sets based on service characteristics and media types. Each PDU set contains packets with identical characteristics (same media type, same QoS requirements), enabling simplified processing while maintaining transmission efficiency. The segmentation is performed at the PDU level, creating manageable groups that can be handled uniformly.
Solution Approach 2:
The patent applies local quality by treating different PDU sets with different processing rules appropriate to their specific characteristics. Each PDU set receives customized handling based on its media type and service requirements, while packets within the same set receive uniform processing. This allows efficient specialized processing without requiring complex individual packet analysis.
2Ease of operation
If packets are processed individually without classification, then processing simplicity is maintained, but network congestion occurs due to inability to prioritize traffic
Solution Approach 1:
The patent performs preliminary classification of packets into PDU sets based on service characteristics before transmission. By pre-grouping packets with identical characteristics and assigning appropriate QoS parameters in advance, the system maintains simple processing while preventing network congestion through proactive traffic management and prioritization.
Solution Approach 2:
The patent changes packet parameters by assigning different QoS parameters to different PDU sets based on their service characteristics. This parameter differentiation enables priority-based scheduling and congestion avoidance while maintaining relatively simple processing rules. High-priority PDU sets (e.g., URLLC) receive preferential treatment in scheduling decisions.
3Speed
If service characteristics are not considered in packet processing, then processing speed is maintained, but service quality deteriorates for XR applications
Solution Approach 1:
The patent changes processing parameters dynamically based on service characteristics. Different PDU sets receive different processing priorities, scheduling weights, and QoS parameters according to their service type (e.g., eMBB, URLLC, mMTC). This allows the system to maintain high processing speed for simple packets while providing enhanced quality assurance for critical XR application packets through parameter-based differentiation.
Data Source
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AI summary
The present disclosure relates to a 5G or 6G communication system for supporting higher data transmission rates. A method performed by a policy control function (PCF) entity in a wireless communication system, according to the present disclosure, may comprise the steps of: receiving, from an application function (AF) entity by using a network exposure function (NEF) entity, a first message including a packet data unit (PDU) set handling indicator and PDU set handling information for a multiplexing service; determining, on the basis of the first message, whether multiplexing service-based PDU set handling information is supported; and transmitting, to the AF entity by using the NEF entity, a second message indicating whether multiplexing service-based PDU set handling information is supported.