CORESET-Based HARQ-ACK Feedback for Reliable PDCCH and PDSCH Reception
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Solution Overview
Problem
Existing 4G communication systems face challenges in achieving higher data rates and improving reception reliability for control and data information, particularly in multiplexing UCI in PUSCH and PUCCH, reducing collision probability between PUSCH and PUCCH transmissions, enabling PDCCH DTX detection, and supporting reception of transport blocks from different cells.
Innovation Solution
The implementation of advanced transmission structures and formats in 5G communication systems, including configurations for CORESETs, PDCCHs, PDSCHs, PUCCHs, and HARQ-ACK codebooks, to manage multiplexing, collision reduction, and power allocation based on target BLERs, enabling efficient HARQ-ACK information feedback and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiplexing of UCI in PUSCH is enabled to improve spectral efficiency, then data transmission efficiency is improved, but reception reliability of control information deteriorates
Solution Approach 1:
The patent segments control information (UCI) and data information into separate transmission channels - PUCCH for control information and PUSCH for data. This segmentation allows each channel to be optimized independently, ensuring reliable control information transmission while maintaining high data transmission efficiency.
Solution Approach 2:
The patent introduces an intermediary mechanism where control information is transmitted via PUCCH separately from data in PUSCH. This intermediary approach prevents control information from being overwhelmed by data transmission, ensuring reliable reception of control signals while maintaining high productivity.
2Productivity
If PUSCH and PUCCH transmissions are allowed simultaneously to improve resource utilization, then spectrum utilization is improved, but collision probability between transmissions increases
Solution Approach 1:
The patent separates control and data transmissions into different dimensional spaces - PUCCH dedicated for control information and PUSCH for data. This dimensional separation allows simultaneous transmissions without collision, as each channel operates in its own protected dimension of the communication spectrum.
3Reliability
If power allocation is increased for control information to improve reception reliability, then reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies local quality by allocating different power levels to different channels based on their specific requirements. PUCCH receives higher power allocation for reliable control information transmission, while PUSCH uses standard power allocation, optimizing overall power consumption while ensuring control reliability.
Data Source
AI summary
Enhancing reception reliability for control information or data information includes receiving: a first configuration for a CORESET and a second configuration for a second CORESET; a first PDCCH, in the first CORESET or the second CORESET, including a first DCI format; and a first PDSCH, scheduled by the first DCI format, including a TB. The method further includes transmitting a first PUCCH including a first HARQ-ACK codebook and a second PUCCH including a second HARQ-ACK codebook. HARQ-ACK information, in response to receiving the TB, is included in: the first HARQ-ACK codebook when the first PDCCH is received in the first CORESET and the second HARQ-ACK codebook when the first PDCCH is received in the second CORESET.