PUSCH Repetition Beam Diversity Under Beam Switching Delays
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Solution Overview
Problem
Existing mobile telecommunication systems face challenges in enabling beam diversity for physical uplink shared channel (PUSCH) repetition due to insufficient consideration of beam switching delays in multi-transmission or reception points (TRP) operations, leading to potential beam switching issues during PUSCH repetition Type B.
Innovation Solution
The network configures or indicates a time offset and rules for the user equipment (UE) to account for beam switching delays, adjusting the actual PUSCH repetitions by muting symbols or discarding repetitions as necessary to ensure sufficient time for beam switching, thereby enabling beam diversity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam switching is performed between consecutive PUSCH repetitions in multi-TRP operations, then beam diversity is improved, but beam switching delays cause timing conflicts and potential transmission failures
Solution Approach 1:
The network configures or indicates a time offset in advance to account for beam switching delays. This preliminary time adjustment ensures that the UE has sufficient time to switch beams between consecutive PUSCH repetitions, preventing timing conflicts while enabling beam diversity for improved reliability in multi-TRP operations.
2Reliability
If time offset is configured to account for beam switching delays, then beam switching reliability is improved, but time domain allocation flexibility is reduced
Solution Approach 1:
The time offset configuration is made dynamic and adaptable. The network can configure or indicate different time offsets based on specific beam switching scenarios and TRP configurations. This dynamic approach maintains beam switching reliability while preserving flexibility in time domain allocations by allowing the system to adapt the time offset to different operational requirements.
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for enabling beam diversity for physical uplink shared channel (PUSCH) repetition under multi-transmission points (TRP). A method may include receiving, from a network, a configuration with at least one time offset to account for at least one delay on switching from one transmit beam to another transmit beam, wherein the configuration defines at least one rule applicable to the at least one time offset. The method may also include determining a need for the at least one time offset between consecutive repetitions based on the configuration and the use of transmit beams for the consecutive repetitions. The method may further include applying, based on the determination, the at least one time offset between the consecutive repetitions. Further, a time domain allocation of at least one repetition of the consecutive repetitions may be changed to accommodate the at least one time offset.