5G Data Retransmission via Puncture Subset Preservation
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Solution Overview
Problem
In 5G new air interface scenarios, when URLLC data with high priority interrupts eMBB data, the base station needs to retransmit incomplete eMBB data, leading to increased latency and resource consumption due to the need to wait for user equipment feedback and transmit the entire data block.
Innovation Solution
A method where the base station preserves and retransmits only the punctured data subset within a second scheduling period, along with puncture location information, allowing for reduced latency and resource usage by avoiding the need for user equipment feedback and minimizing the data to be retransmitted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station retransmits the entire first type data after puncturing, then the user equipment can receive complete data, but the transmission latency increases and resource consumption increases
Solution Approach 1:
The patent segments the first type data into a first data subset (punctured portion) and a second data subset (non-punctured portion). Only the first data subset is retransmitted in the second scheduling period, while the second data subset is kept at the user equipment. This segmentation reduces the retransmission data volume and latency while ensuring complete data reception through combination of both subsets.
2Adaptability or versatility
If the base station waits for user equipment feedback before retransmission, then the retransmission can be triggered by actual need, but the retransmission latency increases
Solution Approach 1:
The patent performs preliminary action by proactively retransmitting the first data subset in the second scheduling period without waiting for HARQ feedback from the user equipment. The network device determines the first data subset based on puncture location information and initiates retransmission immediately, eliminating the feedback waiting time while maintaining adaptive retransmission through puncture indication information.
3Reliability
If the base station retransmits the entire first type data, then the user equipment receives complete data, but the resource consumption increases
Solution Approach 1:
The patent extracts only the punctured first data subset from the complete first type data for retransmission. The network device identifies and extracts the specific punctured portion using puncture location information, then retransmits only this extracted subset in the second scheduling period. This reduces transmission resource consumption while ensuring data completeness through combination with the previously received second data subset.
4Loss of time
If the base station retransmits only the punctured data subset without feedback, then the latency and resource consumption are reduced, but the user equipment must correctly identify and combine the data subsets
Solution Approach 1:
The patent uses puncture location information and puncture indication information as intermediaries to facilitate correct data combination at the user equipment. These intermediary elements carry essential identification and positioning information that enable the user equipment to accurately identify the first data subset, locate its position, and combine it with the second data subset without increasing processing complexity significantly.
Data Source
AI summary
This application discloses a data sending method, a data receiving method, and an apparatus. The data sending method includes: if first type data is punctured, preserving, by a network device, a punctured first data subset in the first type data and puncture location information of the first data subset in the first type data, and retransmitting the first data subset within a second scheduling period to a user equipment. In this way, the network device does not need to wait for feedback from the user equipment before the network device can perform a retransmission operation, so that latency of retransmission is reduced. In addition, the network device only needs to retransmit the punctured first data subset within the second scheduling period but does not need to retransmit the entire first type data, so that an amount of data to be retransmitted is reduced and fewer transmission resources are consumed.