Radio Bearer Synchronization for Multi-QoS Stream Latency Control
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Solution Overview
Problem
Current network architectures and protocols in communication systems, such as 5G, fail to maintain sufficient Quality of Experience (QoE) by ensuring appropriate latency and bandwidth for multiple data streams, particularly in applications like extended reality and cloud gaming.
Innovation Solution
Synchronizing data radio bearers by adjusting latency and quality of service (QoS) flows through methods that include determining latency differences, causing delays when thresholds are exceeded, and providing latency assistance information to manage split ratios and duplication of data radio bearers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple data streams are transmitted with different latency and bandwidth requirements, then application performance (e.g., XR, cloud gaming) is improved, but maintaining sufficient QoE for all streams becomes difficult due to network architecture limitations
Solution Approach 1:
The patent segments data radio bearers into multiple synchronized bearers, each carrying specific QoS flows with different latency and bandwidth requirements. By dividing the data transmission into separate synchronized bearers, the system can independently manage QoS parameters for each stream while maintaining overall application performance and reliability.
2Reliability
If data radio bearers are synchronized by delaying packets when latency difference exceeds threshold, then QoS requirement compliance is improved, but transmission time increases
Solution Approach 1:
The patent applies preliminary action by proactively monitoring latency differences between synchronized data radio bearers and preemptively delaying packets when the difference approaches the threshold. This prevents QoS violations before they occur, ensuring compliance while minimizing actual transmission delays by only delaying when necessary.
3Reliability
If latency assistance information is provided to manage split ratios and duplication, then QoS flow synchronization is improved, but network entity complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where network entities exchange latency assistance information to continuously monitor and adjust the synchronization status of QoS flows. This feedback loop enables automatic adjustment of split ratios and duplication parameters, improving synchronization while managing complexity through standardized information exchange protocols.
Data Source
AI summary
Described herein are methods, apparatuses, and computer program products configured to synchronize radio bearers carrying data flows and/or control flows from a network entity or node within a communication system (e.g., a 5G network), towards user equipment, in order to achieve a desired Quality of Experience (QoE) for applications with multiple data streams and multiple quality of service (QoS) flows whose QoS requirements depend on each other. In some embodiments, two or more data radio bearers (DRBs) for carrying data from a single application, such as extended reality, virtual reality, augmented reality, or the like, e.g. online game streaming, may be synchronized in order to ensure desired QoE for an application with multiple QoS flows.