Sidelink Packet Duplication Control for NR V2X
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Solution Overview
Problem
The existing packet duplication rules for LTE V2X are not suitable for NR SL due to differences in Quality of Service (QoS) models, leading to inefficiencies in high throughput and reliability requirements for sidelink services.
Innovation Solution
A method and apparatus for determining whether to enable or disable packet duplication in the sidelink (SL) based on duplication determination rules, considering QoS parameters, PQI sets, destination IDs, and SL grant failure thresholds, to optimize packet duplication for NR SL services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packet duplication is enabled for all QoS flows in NR SL using LTE V2X rules, then reliability is improved, but resource waste increases due to unnecessary duplication
Solution Approach 1:
The patent changes the parameter for determining packet duplication from a blanket LTE V2X approach to a selective NR SL approach based on QoS parameter thresholds. The network configures specific QoS parameter thresholds (e.g., packet error rate, latency) that trigger packet duplication, allowing the system to adapt duplication behavior to actual service requirements rather than applying it universally.
Solution Approach 2:
The patent implements dynamic packet duplication activation and deactivation based on real-time QoS parameter evaluations. The UE continuously monitors QoS parameters for each QoS flow and dynamically enables or disables packet duplication on a per-flow basis, allowing the system to respond to changing network conditions and service requirements.
2Productivity
If packet duplication is disabled to save resources, then resource efficiency is improved, but reliability deteriorates for high QoS requirement services
Solution Approach 1:
The patent establishes QoS parameter thresholds as the basis for dynamic decision-making. When QoS parameters (such as packet error rate or latency requirements) exceed the configured thresholds, packet duplication is automatically enabled to ensure reliability. This threshold-based mechanism ensures that resources are consumed only when necessary to meet service requirements.
Solution Approach 2:
The system implements feedback mechanisms where the UE monitors QoS parameters for each QoS flow and uses this information to make informed decisions about packet duplication. The continuous evaluation of QoS parameters provides feedback that drives the dynamic activation or deactivation of packet duplication, ensuring that reliability requirements are met while optimizing resource usage.
3Productivity
If packet duplication is dynamically controlled per QoS flow, then resource efficiency is improved, but system complexity increases
Solution Approach 1:
The patent segments the packet duplication control mechanism into independent per-QoS-flow units. Each QoS flow is evaluated and controlled separately based on its own QoS parameters, allowing the system to manage complexity through modular, independent decision-making units rather than requiring complex global optimization across all flows.
Solution Approach 2:
The patent simplifies the control logic by using clear QoS parameter thresholds as the basis for decision-making. The network configures specific threshold values for QoS parameters, and the UE applies straightforward comparison logic to determine whether to enable or disable packet duplication, reducing the complexity of the control mechanism while maintaining effectiveness.
4Ease of manufacture
If LTE V2X packet duplication rules are used for NR SL, then implementation simplicity is improved, but QoS model compatibility deteriorates
Solution Approach 1:
The patent transitions from the LTE V2X QoS parameter set to NR SL-specific QoS parameters. The network configures threshold values for NR SL QoS parameters (such as packet error rate, latency, and throughput requirements), and the UE uses these NR-specific parameters to control packet duplication, ensuring compatibility with the NR SL QoS model while maintaining a similar threshold-based control approach.
Data Source
AI summary
Embodiments of the present application relate to a method and apparatus for packet duplication. According to an embodiment of the present application, a method may include: determining whether to enable or disable a packet duplication associated with one or more quality of service (QOS) flows mapped into sidelink radio bearers (SLRBs) based on a duplication determination rule; and in response to determining to enable a packet duplication, performing the packet duplication.