Reflective QoS Mapping in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing Quality of Service (QoS) due to limitations in reflective QoS mechanisms, particularly in mapping and managing uplink user plane traffic to QoS flows without pre-configured rules, leading to delays in urgent packet transmission.
Innovation Solution
The implementation of a method and device for performing reflective Quality of Service (QoS) in wireless communication systems, utilizing the Service Data Adaptation Protocol (SDAP) to dynamically map and mark QoS flows, enabling the UE to create QoS rules based on downlink traffic and update Access Stratum (AS) and Non-Access Stratum (NAS) mapping rules for efficient uplink packet transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If reflective QoS mechanisms are used to dynamically map uplink traffic to QoS flows, then QoS management flexibility is improved, but transmission delays increase due to lack of pre-configured rules
Solution Approach 1:
The patent applies preliminary action by pre-configuring default QoS rules and packet filters in the UE before traffic transmission begins. These default rules enable immediate mapping of uplink traffic to appropriate QoS flows without waiting for dynamic rule generation, thus reducing transmission delays while maintaining the ability to adapt to changing traffic conditions through subsequent reflective QoS updates.
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of a rule repository and packet filter set that acts as a buffer between network policies and actual traffic mapping. This intermediary layer provides pre-processed mapping rules that can be quickly applied to uplink traffic, bridging the gap between dynamic QoS requirements and immediate transmission needs.
2Speed
If pre-configured QoS rules are used for uplink traffic mapping, then transmission speed is improved, but adaptability to dynamic traffic conditions deteriorates
Solution Approach 1:
The patent implements dynamics by combining static pre-configured QoS rules with dynamic reflective QoS rule generation. The system starts with pre-configured rules for immediate traffic mapping, then continuously updates these rules based on downlink traffic observations and network conditions, allowing the QoS mapping to evolve dynamically while maintaining operational speed.
Solution Approach 2:
The patent applies feedback through the reflective QoS mechanism where the UE monitors downlink traffic patterns, QoS flow mappings, and network responses, then uses this feedback to update and refine uplink QoS rules. This closed-loop feedback ensures that pre-configured rules are continuously optimized based on actual traffic conditions and network requirements.
3Measurement precision
If reflective QoS rules are dynamically generated, then QoS flow accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the QoS rule management into distinct functional components: packet filter sets for traffic classification, default QoS rules for initial mapping, reflective QoS rules for dynamic updates, and a rule repository for storage. This segmentation allows each component to be processed independently, reducing overall processing complexity while maintaining accurate QoS flow mapping.
Solution Approach 2:
The patent uses copying by replicating QoS rule structures and packet filter templates that can be reused across different traffic flows. Instead of creating entirely new complex rules for each flow, the system copies and adapts existing rule templates, significantly reducing processing complexity while maintaining accurate QoS mapping through parameter customization.
Data Source
Figure 1~2A
Figure 2B
Figure 3(a)~3(b)
AI summary
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for performing reflective QoS in wireless communication system, the method comprising: receiving a DL SDAP PDU via a DL DRB with a first DRB ID from a network, wherein the DL SDAP PDU includes a first indicator indicating whether to perform updating AS mapping rule for UL and a second indicator indicating whether to perform updating NAS reflective QoS rule for UL; and performing the updating of the AS mapping rule for UL or the updating of the NAS reflective QoS rule for the UL according to the first indicator and the second indicator.