Deprioritizing Duplicated Packets in V2X Sidelink Uplink Transmission
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Solution Overview
Problem
In wireless communication systems, particularly in LTE-based V2X sidelink communication, the prioritization of duplicated packets over original packets can lead to inefficiencies, as duplicated packets do not need to be prioritized for transmission, causing potential delays and interruptions in uplink transmissions.
Innovation Solution
A method and apparatus for deprioritizing duplicated packet transmissions in user equipment (UE) by generating a first packet, a second packet, and a third packet, where the third packet is a duplication of the second packet, and subsequently deprioritizing the third packet when the second packet is prioritized over the first packet, ensuring that original packets are transmitted reliably over both sidelink and uplink channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If duplicated packets are prioritized over original packets for transmission, then reliability of packet delivery is improved, but transmission efficiency deteriorates due to unnecessary prioritization of redundant data
Solution Approach 1:
The patent extracts and identifies duplicated packets from the packet stream using PDCP layer duplication detection mechanisms. By separating duplicated packets from original packets, the system can apply different prioritization rules - original packets receive high priority for reliable delivery while duplicated packets are deprioritized to avoid wasting transmission resources on redundant data, thus resolving the contradiction between reliability and transmission efficiency
Solution Approach 2:
The patent changes the priority parameter of duplicated packets dynamically. When packet duplication is detected at the PDCP layer, the system modifies the priority parameter of the duplicated packets to be lower than that of original packets. This parameter change allows the system to maintain high reliability for essential data while improving overall transmission efficiency by preventing duplicated packets from occupying premium transmission resources
2Reliability
If duplicated packets are transmitted concurrently over two independent networks, then seamless redundancy and reliability are improved, but transmission resource consumption increases
Solution Approach 1:
The patent applies different quality treatments to different types of packets. Original packets are transmitted with high priority through both independent networks to ensure seamless redundancy, while duplicated packets are transmitted with lower priority or deprioritized. This local quality differentiation ensures that critical redundancy resources are concentrated on original packets, reducing overall transmission resource consumption while maintaining reliability
Solution Approach 2:
The patent implements partial action by selectively prioritizing only the necessary packets. Instead of prioritizing all packets equally, the system applies prioritization only to original packets that require reliable delivery, while duplicated packets receive standard or reduced priority. This partial action approach maintains the essential redundancy benefit while avoiding excessive resource consumption on already-redundant data
3Reliability
If packet duplication is performed by PDCP layer, then reliability and latency reduction are improved, but complexity of packet management increases
Solution Approach 1:
The patent introduces an intermediary mechanism at the PDCP layer that acts as a mediator between packet generation and transmission. This intermediary detects duplicated packets, manages their priority assignment, and coordinates their transmission across independent networks. By centralizing the management function at the PDCP layer, the system simplifies packet management complexity while maintaining the reliability and latency benefits of duplication
Data Source
AI summary
A method and apparatus for deprioritizing duplicated packet transmission in a wireless communication system is provided. A user equipment (UE) generates a first packet, a second packet and a third packet. The third packet is duplication of the second packet. The UE deprioritizes the third packet under the first packet when the second packet is prioritized over the first packet. The first packet may be a packet for uplink transmission, and the second packet and the third packet may be packets for sidelink transmission.