Sidelink Data Duplication Control via QoS and Link Conditions
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Solution Overview
Problem
Existing solutions for sidelink data duplication function control in wireless communications systems, such as LTE and NR, face challenges in ensuring transmission stability due to reliance on single reliability factors and incompatible QoS modeling mechanisms across different systems.
Innovation Solution
A method for sidelink data duplication function control that uses a preset rule based on quality of service (QoS) conditions and link conditions to activate or deactivate data duplication function at various control granularities, including flow level, SLRB level, link level, and terminal device level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LTE sidelink data duplication activation is controlled by PPPR threshold alone, then reliability requirement is considered, but transmission stability deteriorates due to ignoring other QoS factors
Solution Approach 1:
The patent changes the control parameters from single-factor PPPR threshold to multi-factor QoS parameters including PPPR, PPPP, and PFI. This allows dynamic adjustment of data duplication activation based on comprehensive QoS requirements, improving both reliability and transmission stability by considering multiple dimensions of service quality.
Solution Approach 2:
The patent creates a universal data duplication control mechanism that works across different sidelink scenarios (V2X, public safety, etc.) and different QoS requirements. The multi-parameter QoS control approach serves multiple functions: reliability control, transmission stability, resource efficiency, and compatibility with both LTE and NR systems.
2Ease of manufacture
If LTE sidelink duplication solution is applied to NR sidelink, then implementation simplicity is improved, but compatibility deteriorates due to different QoS modeling mechanisms
Solution Approach 1:
The patent develops a universal data duplication control solution that functions across both LTE and NR sidelink systems. By using multi-parameter QoS control (PPPR, PPPP, PFI) that aligns with NR's per-flow QoS modeling while maintaining compatibility with LTE's per-packet approach, the solution achieves broad system compatibility without requiring separate implementation paths.
Solution Approach 2:
The patent adapts the control parameters to match different system requirements: using PPPR for LTE compatibility while incorporating PFI for NR compatibility. This parameter adaptation enables the same data duplication mechanism to work effectively in both LTE and NR environments, achieving cross-system compatibility.
3Speed
If data duplication is activated based on single PPPR threshold, then activation speed is improved, but data transmission stability deteriorates
Solution Approach 1:
The patent transitions from single-parameter PPPR threshold control to multi-parameter QoS control involving PPPR, PPPP, and PFI. This enables faster and more accurate activation decisions by evaluating multiple QoS dimensions simultaneously, improving both activation speed and transmission stability through comprehensive service quality assessment.
Solution Approach 2:
The patent implements feedback mechanisms where the network device monitors QoS parameters (PPPR, PPPP, PFI) and provides control indications to the terminal for data duplication activation/deactivation. This closed-loop feedback ensures rapid response to changing QoS requirements while maintaining transmission stability through coordinated control.
Data Source
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AI summary
This disclosure provides a method for sidelink data duplication function control, a method for information configuration, and a device. The method includes: receiving, by a first terminal device from a higher layer, one or more data flows to be sent to a second terminal device, where a receiving device of the data flows is the second terminal device; and controlling, based on a preset rule, data duplication function of a sidelink radio bearer SLRB between the first terminal device and the second terminal device, where the preset rule includes whether at least one of the data flows satisfies a preset quality of service QoS condition, and/or whether at least one communication link between the first terminal device and the second terminal device satisfies a preset link condition.