Parallel Redundant Data Packet Transmission for URLLC
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Solution Overview
Problem
Mobile communication networks face challenges in reliably transmitting data packets due to varying channel quality, which is not adequately addressed by conventional retransmission methods like HARQ, leading to limitations in reliability and latency.
Innovation Solution
Implementing a packet redundancy/duplication approach where user equipment (UE) and radio access networks transmit multiple versions of data packets in parallel via different physical resources, utilizing error correction codes and redundancy versions to ensure reliable transmission without the need for retransmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional retransmission methods like HARQ are used, then data packet transmission can be performed with simpler initial protocols, but reliability is insufficient and latency increases due to retransmission delays
Solution Approach 1:
The patent applies preliminary action by transmitting multiple redundancy versions of data packets in advance through different physical resources (diversity channels) before transmission failures occur. This allows the receiver to have multiple copies ready, eliminating the need for retransmission and reducing latency while ensuring reliability.
Solution Approach 2:
The patent uses copying by creating multiple redundancy versions (copies) of the same data packet and transmitting them through different physical resources. These copies serve as backups, ensuring that at least one copy reaches the destination successfully, thereby improving reliability without requiring retransmission.
2Reliability
If multiple redundancy versions of data packets are transmitted in parallel via different physical resources, then transmission reliability improves and latency is reduced, but network resource consumption increases
Solution Approach 1:
The patent applies partial action by transmitting a limited number of redundancy versions (e.g., 2-3 copies) rather than excessive duplication. This provides sufficient reliability for URLLC services while controlling resource consumption. The number of redundancy versions is optimized to meet reliability requirements without wasting network resources.
3Quantity of substance
If conventional retransmission schemes are used, then fewer network resources are consumed initially, but end-to-end radio link latency increases due to retransmission delays
Solution Approach 1:
The patent applies preliminary action by pre-transmitting multiple redundancy versions through different physical resources before any transmission failure occurs. This eliminates the need for retransmission delays, achieving ultra-low latency (e.g., 1 ms) while efficiently using network resources through optimized redundancy transmission.
Data Source
AI summary
A user equipment for a mobile communication network is provided. The mobile communication network has a radio access network including a plurality of cells and being configured to serve the user equipment within a cell. To receive a data packet from the radio access network, the user equipment is configured to receive a plurality of different versions of the data packet transmitted by the radio access network to the user equipment in parallel via different physical resources. To provide a data packet to the radio access network, the user equipment is configured to provide a plurality of different versions of the data packet and to transmit the plurality of different versions of the data packet to the radio access network in parallel via different physical resources.