Uplink Channel Coverage via Multi-Slot Joint Estimation
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Solution Overview
Problem
There is a need to improve the coverage of uplink channels in wireless communication systems, particularly in the ultra-high-frequency (mmWave) band, to extend cell coverage effectively.
Innovation Solution
The method involves transmitting a physical uplink shared channel (PUSCH) through multiple slots using transport block (TB) processing, with joint channel estimation and feedback delay information to determine the validity of HARQ-ACK information, enabling efficient resource utilization and improved channel performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If repetitive transmission of uplink channel is performed in ultra-high-frequency band, then cell coverage is extended, but path loss and signal degradation increase
Solution Approach 1:
The patent combines multiple PUSCH transmissions across different slots to perform joint channel estimation, merging the channel information from multiple transmissions to achieve more accurate estimation and compensate for path loss in ultra-high-frequency bands
Solution Approach 2:
The patent implements feedback mechanisms where the base station provides feedback delay information and HARQ-ACK information to the terminal, allowing the terminal to adjust and optimize subsequent transmissions based on received feedback, thereby improving signal quality despite path loss
2Measurement precision
If joint channel estimation is performed over multiple slots, then channel estimation accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent segments the channel estimation process by introducing reference signals (DMRS) in each slot that can be independently processed, allowing joint channel estimation to be performed by combining these segmented reference signal measurements across multiple slots rather than processing the entire multi-slot signal at once
Solution Approach 2:
The patent performs preliminary channel estimation using reference signals (DMRS) embedded in each PUSCH transmission before combining results across slots, preparing channel information in advance to simplify the overall joint estimation process and reduce processing complexity
3Productivity
If transport block is allocated to multiple slots, then resource utilization is improved, but timing synchronization and HARQ feedback management become more complex
Solution Approach 1:
The patent implements a feedback mechanism where the base station sends feedback delay information and HARQ-ACK information to the terminal, enabling the terminal to properly manage timing and synchronization when transport blocks are allocated across multiple slots, thereby handling the increased complexity of multi-slot HARQ feedback
Solution Approach 2:
The patent introduces dynamic timing adjustments by allowing the feedback delay information to be configured flexibly, enabling the system to adapt timing parameters dynamically based on the specific multi-slot allocation scenario, which helps manage the complexity of HARQ feedback timing
Data Source
AI summary
The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure provides a method for improving the coverage of an uplink channel for uplink transmission. A method performed by means of a terminal in a wireless communication system, according to one embodiment of the present disclosure, may comprise the steps of: receiving, from a base station, PUSCH configuration information for joint channel estimation by using transport block (TB) processing over multi-slots (TBoMS) in which one TB is allocated and transmitted to multiple slots, and a DMRS received through a plurality of PUSCHs; transmitting, to the base station, at least one PUSCH according to the PUSCH configuration information; receiving, from the base station, feedback delay information and a PDCCH, which includes an HARQ process number corresponding to the at least one PUSCH; and determining, on the basis of the PUSCH configuration information and the feedback delay information, the validity of HARQ-ACK information included in the PDCCH.