Sidelink PDCP Duplication Detection via Pre-configured Parameters
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Solution Overview
Problem
Current sidelink data duplication technologies in V2X communication lack clear methods for duplication detection at the PDCP layer, leading to inefficiencies in sidelink message transmission reliability.
Innovation Solution
A receiving method and sending method are introduced that utilize duplication detection parameters, such as sequence number parameters and timers, to detect and manage duplicated sidelink PDCP PDUs, ensuring accurate duplication detection and sequence delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sidelink data duplication is introduced to improve transmission reliability, then reliability is improved, but device complexity increases due to the need for duplication detection mechanisms
Solution Approach 1:
The patent applies preliminary action by pre-configuring duplication detection parameters (such as duplication detection timers and sequence number ranges) before duplication detection is needed. The transmit side sends these parameters in advance through RRC signaling or MAC CE, so the receive side is already prepared to perform duplication detection when duplicated packets arrive, avoiding the need for complex real-time analysis
Solution Approach 2:
The patent uses copying by transmitting duplication detection parameters (like timer values and sequence number information) from the transmit side to the receive side. These parameters are copied information that enable the receive side to independently perform duplication detection without needing to analyze the actual packet content, simplifying the detection mechanism
2Measurement precision
If duplication detection parameters are transmitted to enable detection, then duplication detection accuracy is improved, but loss of time occurs due to parameter transmission overhead
Solution Approach 1:
The patent applies universality by designing duplication detection parameters that serve multiple functions. The same parameters (such as sequence number ranges and timer values) are used both for configuring the detection mechanism and for actual duplication detection operations. This multi-functionality reduces the need for separate parameter transmissions, saving time
Solution Approach 2:
The patent uses parameter changes by allowing dynamic adjustment of duplication detection parameters based on network conditions. The timer values, sequence number ranges, and other parameters can be modified through MAC CE or RRC reconfiguration, enabling the system to optimize between detection accuracy and transmission overhead根据不同场景
Data Source
AI summary
A receiving method, a sending method and communications device are provided. The receiving method includes: obtaining a duplication detection parameter; and performing duplication detection on a received sidelink packet data convergence protocol PDCP protocol data unit PDU by using the duplication detection parameter.