Multi-TU PUSCH Beam Grouping for Reliable Uplink Transmission
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Solution Overview
Problem
The increasing demand for higher data rates and efficient resource utilization in wireless communication systems necessitates improved methods for transmitting Physical Uplink Shared Channels (PUSCH) to accommodate explosive data traffic and diverse user equipment capabilities.
Innovation Solution
A method for transmitting PUSCH in multiple time units (TUs) is proposed, where time units are grouped and beams are determined for each group based on spatial relation reference signals (RS), minimizing beam switching delays and optimizing transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single beam is used for multi-TU PUSCH transmission, then device complexity is reduced, but communication reliability deteriorates due to beam blocking or fading in certain directions
Solution Approach 1:
The patent divides the multi-TU PUSCH transmission into different TU groups, with each group using a separate beam. This segmentation allows the system to transmit the same data through multiple spatial paths, improving reliability without requiring complex per-TU beam management, as beams are determined at the TU group level.
Solution Approach 2:
The patent combines multiple beams for transmitting the same PUSCH data across different TU groups. By merging transmission paths through spatial diversity, the system achieves higher communication success probability while maintaining manageable device complexity through group-based beam determination.
2Reliability
If beams are determined for each individual TU, then transmission reliability is improved, but signaling overhead increases due to frequent beam switching indications
Solution Approach 1:
The patent merges multiple TUs into TU groups and determines a single beam for each group. This reduces the frequency of beam switching indications from per-TU to per-TU-group level, significantly lowering signaling overhead while maintaining reliability through spatial diversity across groups.
Solution Approach 2:
The patent segments TUs into groups where beam determination is performed at the group level rather than individual TU level. This segmentation strategy balances reliability (through multiple beams) with signaling efficiency (by reducing beam indication frequency).
3Reliability
If beam switching is performed frequently to adapt to channel conditions, then communication reliability improves, but beam switching delay increases affecting transmission efficiency
Solution Approach 1:
The patent segments TUs into groups with beam determination at the group level, reducing the frequency of beam switching operations. This approach maintains communication reliability through spatial diversity while minimizing beam switching delays that would occur with more frequent per-TU beam changes.
Data Source
AI summary
A method by which a terminal transmits a physical uplink shared channel (PUSCH) in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving a higher layer message including information related to a PUSCH (multi-TU PUSCH) configuration transmitted from multiple time units (TUs); receiving a lower layer message related to a spatial relation RS to be applied to the transmission of the multi-TU PUSCH; determining a beam for the transmission of the multi-TU PUSCH on the basis of the higher layer message and the lower layer message; and transmitting the multi-TU PUSCH on the basis of the determined beam. The multiple TUs are sorted into multiple TU groups, the lower layer message includes information indicating at least one RS to be applied to each TU group from among the multiple TU groups, and the beam is determined for each TU group.