PDCP Discard Timer Mapping for Multi-QoS XR Data Flows
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communications systems face challenges in efficiently handling multimodal data flows for immersive technologies like XR, where precise synchronization of different data streams is crucial to maintain a high-quality user experience, and current PDCP discard timers do not adequately address the varying QoS requirements of different data flows multiplexed on a single radio bearer.
Innovation Solution
Configuring multiple PDCP discardTimers for each QoS flow mapped to a radio bearer, with distinct timer configurations for different PDU sets, and incorporating importance level-based discarding mechanisms to manage packet delivery according to specific QoS parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple timer configurations are implemented for different QoS flows, then QoS management precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the single PDCP discard timer into multiple timers, with each timer configured for specific QoS flows. This allows different discard behaviors to be applied to different data flows multiplexed on the same radio bearer, enabling precise QoS management for each flow type while maintaining the overall timer mechanism structure.
Solution Approach 2:
The patent applies local quality by configuring distinct timer parameters (such as discard timer values) for different QoS flows based on their specific requirements. Each QoS flow receives tailored timer configurations that match its service characteristics, allowing optimized packet handling for each flow type without affecting other flows.
2Reliability
If multiple timer configurations are implemented for different QoS flows, then packet delivery reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent segments QoS flow identification into separate identifiers that can be efficiently processed by the PDCP entity. By using standardized QoS flow identifiers and mapping them to corresponding timer configurations, the system achieves reliable packet delivery while minimizing the overhead required to signal and manage multiple timer settings.
3Productivity
If multiple timer configurations are implemented for different QoS flows, then network congestion is reduced, but device complexity increases
Solution Approach 1:
The patent segments the packet processing function by implementing separate discard timers for different QoS flows. This allows the PDCP entity to independently manage packet discarding for each flow based on its specific characteristics, preventing congestion in critical flows while allowing less critical flows to be discarded more aggressively, thereby improving overall network throughput.
Solution Approach 2:
The patent changes the timer parameters (discard timer values) based on QoS flow characteristics. By adjusting these parameters dynamically or semi-dynamically according to flow type and network conditions, the system optimizes packet handling to reduce congestion without requiring complex reconfiguration of the entire PDCP entity.
Data Source
AI summary
Various aspects of the present disclosure relate to packet data convergence protocol (PDCP) configurations. An apparatus, such as a UE, receives a configuration for a PDCP entity of the UE, where the configuration includes a set of timer configurations and a set of identifiers associated with the set of timer configurations. The UE receives a SDU at the PDCP entity of the UE, and starts a timer associated with the PDCP entity of the UE and in accordance with a timer configuration, where the timer configuration is applicable for the received SDU based at least in part on a corresponding identifier of the timer configuration and a respective identifier the received SDU.