Parallel HARQ Communication for Low-Latency Reliable Data Transfer
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Solution Overview
Problem
Current communication methods in LTE systems face a trade-off between low-delay and high-reliability data transmission, as multiple retransmissions to improve reliability inevitably increase transmission delay.
Innovation Solution
Implementing a parallel Hybrid Automatic Repeat Request (HARQ) method where multiple data packets with the same content are sent or received within the same transmission time, allowing for parallel processing and combined decoding to enhance reliability while reducing delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple retransmissions are performed to improve reliability of data transmission, then data transmission reliability is improved, but transmission delay increases
Solution Approach 1:
The patent applies preliminary action by sending multiple copies of the same data packet in advance through different transport layers before any transmission failure occurs. Instead of waiting for feedback to trigger retransmissions, the system proactively transmits redundant data packets simultaneously via multiple paths (e.g., different PDCP or RLC layers), ensuring that at least one copy arrives successfully while minimizing delay through parallel transmission.
Solution Approach 2:
The patent introduces another dimension by utilizing multiple transport layers (different PDCP or RLC layers) as additional transmission dimensions. Rather than relying on sequential retransmissions in a single layer, the system distributes data packets across multiple layers, creating a multi-dimensional transmission space where failures in one layer can be compensated by successful transmission in another layer.
2Reliability
If multiple retransmissions are performed to improve reliability of data transmission, then data transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by making existing transport layers serve multiple functions. The same PDCP or RLC layers that handle normal data transmission are also utilized to transmit redundant copies for reliability enhancement. This multi-functionality avoids the need for separate dedicated retransmission mechanisms, thereby improving reliability while minimizing additional device complexity.
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2A~2B
AI summary
The present invention discloses a communication method and a communication device. In embodiments of the present invention, the communication device receives a parallel hybrid automatic repeat request HARQ communication indication, where the parallel HARQ communication indication is used to indicate the communication device to send or receive data in a parallel HARQ manner, where the sending data in a parallel HARQ manner by the communication device is sending, by the communication device, at least one data packet with same content within a same transmission time interval; and the receiving data in a parallel HARQ manner by the communication device is receiving, by the communication device, at least one data packet with same content within a same transmission time interval, and performing combined decoding on the received at least one data packet with same content; and the communication device sends or receives the data in the parallel HARQ manner according to the parallel HARQ communication indication. According to the present invention, a delay of data transmission can be reduced, and reliability of data transmission is improved.