UPF RTT Threshold Control for AR VR Packet Transmission
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Solution Overview
Problem
Network transmission quality fluctuations often result in user plane function (UPF) side round trip time (RTT) requirements not being met, leading to issues like jamming and lagging in data packet transmission, particularly affecting services like augmented reality (AR) and virtual reality (VR), which may render these services unusable in real scenarios.
Innovation Solution
A method involving a communication system where an application function (AF) network element sends a round trip time request to a policy control function (PCF) network element with a UPF side RTT threshold value, triggering a quality of service detection policy that ensures the UPF side RTT meets the required threshold by adjusting network configurations, such as splitting uplink and downlink service transmission delays, and reporting any exceedances to determine a processing mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network transmission is performed without UPF side RTT threshold control, then network flexibility is maintained, but transmission quality deteriorates causing jamming and lagging
Solution Approach 1:
The patent introduces UPF side RTT threshold values as a key parameter to control transmission quality. By setting and monitoring RTT thresholds, the system dynamically adjusts network transmission parameters to prevent jamming and lagging, thereby improving reliability without requiring fundamental changes to network architecture
Solution Approach 2:
The patent implements a feedback mechanism where the UPF network element detects current RTT values and compares them against threshold values. When RTT exceeds the threshold, the system generates overtime messages and triggers processing mode adjustments, creating a closed-loop control system that maintains transmission quality
2Reliability
If UPF side RTT threshold values are strictly enforced, then transmission quality is maintained, but network adaptability to changing conditions deteriorates
Solution Approach 1:
The patent makes the RTT threshold control dynamic by allowing the PCF network element to adjust processing modes based on real-time RTT measurements. The system can switch between different processing modes to adapt to changing network conditions while maintaining RTT compliance, thereby balancing reliability with adaptability
Solution Approach 2:
The patent establishes RTT threshold values in advance through the AF network element's round trip time request to the PCF network element. This preliminary configuration allows the system to proactively prevent RTT violations before they occur, rather than reactively responding to degraded performance
3Measurement precision
If detailed QoS detection policies are implemented, then transmission precision is improved, but system complexity increases
Solution Approach 1:
The patent segments the QoS detection function into specific network elements with defined responsibilities. The UPF network element performs RTT detection and generates overtime messages when thresholds are exceeded, while the PCF network element handles processing mode determination. This segmentation enables precise RTT measurement without requiring all network elements to implement complex detection logic
Data Source
AI summary
A method includes sending, by an application function network element, a round trip time request of a service flow to a policy control function (PCF) network element, and a first quality of service detection policy is generated and sent, by the PCF network element, to a session management function (SMF) network element. In response to receiving a quality of service detection request, a UPF side round trip time overtime message is generated by the first UPF network element when a current UPF side round trip time of the service flow between a terminal and the first UPF network element exceeds the first UPF side round trip time threshold value. In response to receiving the UPF side round trip time overtime message, a processing mode is determined by the PCF network element for the service flow to meet the round trip time request.