PDU Set-Based FEC Packet Scheduling for 5G XR Congestion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing 5G mobile communication systems face challenges in efficiently handling the large amount of traffic, particularly in metaverse and extended reality (XR) applications, where conventional packet processing methods fail to consider the service characteristics of each packet, leading to congestion issues.
Innovation Solution
The proposed solution involves modifying the scheduler's random packet drop mechanism to utilize traffic characteristic information provided by the service through the actual application function (AF) entity or application server (AS). This method processes packets in specific units (PDU sets) and prioritizes them based on importance, using real-time transport protocol (RTP) and network adaptation layer (NAL) unit header information to distinguish identical packets and create PDU set information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional packet processing methods are used, then the system is simple to operate, but congestion issues occur and network performance deteriorates under large traffic loads
Solution Approach 1:
The patent segments packets into PDU sets based on service characteristics and packet importance. Each PDU set is processed independently with specific scheduling rules, allowing the system to handle different traffic types (e.g., XR, metaverse) with appropriate priority levels. This segmentation enables efficient congestion management without requiring complete reprocessing of all packets.
Solution Approach 2:
The patent applies different scheduling policies to different PDU sets based on their specific characteristics. Critical packets receive higher priority scheduling while less important packets are processed with standard scheduling. This local quality approach allows the system to optimize network performance for specific traffic types without increasing overall system complexity.
2Reliability
If packets are processed in PDU set units with priority scheduling, then congestion management improves, but the complexity of packet processing increases
Solution Approach 1:
The patent performs preliminary classification of packets into PDU sets based on service characteristics and importance levels before scheduling. This preliminary action organizes packets in advance, allowing the scheduling mechanism to operate on pre-grouped sets rather than individual packets, thereby reducing the complexity of real-time scheduling decisions while improving congestion management.
Solution Approach 2:
The patent applies priority scheduling selectively to specific PDU sets that require congestion management (e.g., XR, metaverse traffic) rather than implementing complex scheduling across all packet types. This partial action approach focuses resources on critical traffic flows, achieving reliable congestion management without requiring comprehensive complex scheduling for all network traffic.
3Productivity
If random packet drop mechanism is modified to use traffic characteristic information, then packet prioritization improves, but the complexity of scheduler operation increases
Solution Approach 1:
The patent enables the scheduler to automatically utilize traffic characteristic information that is already provided by service functions and application servers. The scheduler operates on service characteristic indicators and packet importance levels that are inherently available in the system, eliminating the need for complex external analysis mechanisms. This self-service approach improves packet prioritization efficiency while maintaining scheduler operation simplicity.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting higher data rate. A method performed by an SMF in a communication system includes receiving, from a PCF, a PCC rule including a protocol descriptor that indicates support of a PDU set-based FEC, transmitting, to a UPF, packet handling information including detection rule information for distinguishing an FEC source packet and an FEC repair packet in the PDU set-based FEC, and transmitting, to an AMF, a QoS profile including a QoS rule updated based on the PCC rule.