Multi-TU PUSCH Beam Mapping for Reliable Uplink Transmission
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Solution Overview
Problem
The existing mobile communication systems face challenges in accommodating explosive data traffic, high data rates, large numbers of connected devices, low latency, and high energy efficiency, particularly in the transmission of Physical Uplink Shared Channels (PUSCH) due to resource shortages and beam quality deterioration.
Innovation Solution
A method for transmitting PUSCH in multiple time units (TUs) is proposed, where TUs are grouped into multiple TU groups, and beams are determined for each group based on spatial relation RSs, minimizing beam switching delays and power transition times, and optimizing beam selection through specific rules for spatial relation RS mapping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beams are determined for each TU group in multi-TU PUSCH transmission, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The patent divides the transmission process into multiple TU groups, with each group having its own determined beam. This segmentation allows the system to adapt to changing channel conditions in different time units while maintaining manageable complexity through structured grouping and standardized beam determination procedures for each group.
Solution Approach 2:
The patent performs beam determination for each TU group in advance before actual transmission. By pre-determining beams based on spatial relation RSs and channel conditions, the system prepares optimal transmission parameters beforehand, reducing real-time decision complexity while ensuring reliable communication when transmission occurs.
2Reliability
If beam switching is optimized for each TU group, then transmission reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent applies different beam configurations and spatial relation RS mappings to different TU groups based on local channel conditions. This localized approach allows optimized beam switching for each group's specific requirements while avoiding unnecessary signaling for groups with similar or stable conditions, thereby balancing reliability improvement with overhead control.
3Reliability
If spatial relation RS mapping is optimized for each TU group, then beam quality is improved, but processing time increases
Solution Approach 1:
The patent performs spatial relation RS mapping and beam determination for each TU group in advance before transmission. By pre-computing optimal beam mappings based on available channel state information, the system ensures high beam quality for each group while minimizing real-time processing delays during actual transmission.
Solution Approach 2:
The patent implements periodic beam determination and spatial relation RS mapping for TU groups, updating beam configurations at regular intervals or when channel conditions change significantly. This periodic approach maintains beam quality through regular optimization while avoiding continuous processing that would increase time loss and system complexity.
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.