PUSCH Beam Selection via DL RS Indication and Port Virtualization
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Solution Overview
Problem
Current mobile communication systems face challenges in efficiently handling explosively increasing data traffic, requiring advanced technologies to support higher per-user transmission rates, numerous connecting devices, low latency, and high-energy efficiency, particularly in transmitting Physical Uplink Shared Channels (PUSCH) without ambiguity in UE or base station operations.
Innovation Solution
The method involves using beam correspondence for PUSCH transmission based on port virtualization, where configuration information and downlink control signals indicate a downlink reference signal (DL RS) for beam selection, and applying port virtualization to recent SRS transmission, allowing for efficient PUSCH transmission without mismatches in modulation coding schemes or precoders, and reducing latency and overhead by skipping unnecessary SRS transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If port virtualization is applied to SRS transmission for beam correspondence, then PUSCH transmission efficiency is improved, but ambiguity in UE or base station operation occurs
Solution Approach 1:
The patent introduces feedback mechanisms where the base station provides downlink control information indicating the selected beam for PUSCH transmission, and the UE provides capability information about its antenna ports. This feedback loop resolves the ambiguity by ensuring both parties have consistent understanding of the port virtualization operation and beam selection process.
2Loss of time
If beam correspondence is used for PUSCH transmission, then latency is reduced, but mismatches in modulation coding schemes or precoders may occur
Solution Approach 1:
The patent applies port virtualization to the most recent SRS transmission before PUSCH transmission, establishing a predetermined relationship between SRS and PUSCH beams. This preliminary action ensures that the beam correspondence is already established and configured correctly, preventing mismatches in modulation coding schemes or precoders while reducing latency.
Solution Approach 2:
The base station provides downlink control information that includes indications of the selected beam for PUSCH transmission, ensuring that the UE and base station have consistent understanding of the beam selection. This feedback mechanism prevents mismatches by confirming the beam correspondence relationship before actual transmission occurs.
3Loss of substance
If SRS transmission is skipped to reduce overhead, then system overhead is reduced, but beam selection accuracy may be compromised
Solution Approach 1:
The patent applies port virtualization to the most recent SRS transmission, establishing a predetermined relationship between SRS and PUSCH beams. This preliminary action allows the system to use existing SRS transmission data for beam selection, reducing the need for additional SRS transmissions while maintaining beam selection accuracy through the port virtualization relationship.
Data Source
AI summary
The present specification discloses a method and an apparatus for transmitting/receiving a physical uplink shared channel in a wireless communication system. Specifically, a method in which a terminal transmits a physical uplink shared channel (PUSCH) in a wireless communication system comprises the steps of: receiving configuration information related to transmission of the PUSCH; receiving downlink control information that schedules the PUSCH, the downlink control information comprising information that indicates a downlink reference signal (DL RS) related to a beam for transmission of the PUSCH; and transmitting the PUSCH by using the beam.