Multi-TU PUSCH Beam Determination for Wireless Reliability
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting a Physical Uplink Shared Channel (PUSCH) due to resource shortages and the need for higher data speeds, requiring advanced methods to manage beam configurations and spatial relations for improved communication reliability and success probability.
Innovation Solution
A method where user equipment (UE) receives higher and lower layer messages to configure PUSCH transmission in multiple time units, determining beams for each time unit group based on spatial relation reference signals, allowing for preconfigured beams and minimizing deviations in TU group sizes to enhance communication reliability and adapt to changing link qualities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam configurations are dynamically adapted for each time unit group, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the multi-TU PUSCH transmission into multiple time unit groups (TU groups), where each group can have its beam configuration independently determined. This segmentation allows dynamic adaptation of beams for each TU group based on spatial relation reference signals, improving communication reliability while managing complexity through structured organization of the time units.
Solution Approach 2:
The patent applies preliminary action by determining beams for TU groups based on pre-configured spatial relation reference signals (RS) before actual transmission occurs. The UE receives higher layer messages configuring multi-TU PUSCH and lower layer messages indicating spatial relation RS for each TU group, allowing beam determination to be prepared in advance and executed efficiently during transmission.
2Reliability
If multiple beams are determined for different time unit groups, then communication success probability increases, but signaling overhead increases
Solution Approach 1:
The patent applies local quality by determining beams for each TU group based on specific spatial relation reference signals relevant to that local group, rather than using a single uniform beam configuration for the entire multi-TU PUSCH. This allows optimized beam selection for each local TU group while the overall structure remains coordinated through higher layer messages.
3Reliability
If beam switching is optimized for each time unit group, then transmission reliability improves, but beam switching delay increases
Solution Approach 1:
The patent reduces beam switching delay by performing preliminary beam determination based on received higher and lower layer messages before actual transmission begins. The UE determines beams for each TU group in advance using the spatial relation RS information, so that when transmission starts, the beam configuration is already prepared, minimizing switching delays while maintaining reliability.
Data Source
AI summary
A method for transmitting, by a user equipment (UE), a Physical Uplink Shared Channel (PUSCH) in a wireless communication system according to an embodiment of the present disclosure includes: receiving a higher layer message including information related to a configuration of a PUSCH (multi-TU PUSCH) transmitted in a plurality of time units, the plurality of time units (TUs) being classified into a plurality of TU groups; receiving a lower layer message related to a spatial relation RS applied to the transmission of the multi-TU PUSCH; determining beams for each of remaining TU groups other than at least one specific TU group of the plurality of TU groups based on the lower layer message; determining a beam for at least one specific TU group based on the beams for each of the remaining TU groups; and transmitting the multi-TU PUSCH based on the determined beams.