Multi-Panel PUSCH Transmission via Unified SRI Field
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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 data rates, numerous connected devices, low latency, and high-energy efficiency, particularly in transmitting physical uplink shared channels across multiple panels.
Innovation Solution
A method for transmitting a physical uplink shared channel (PUSCH) in a wireless communication system, where a user equipment (UE) receives configuration information and downlink control information (DCI) to schedule the PUSCH, utilizing a specific field representing SRS resources for simultaneous transmission across multiple panels, allowing for reduced signaling overhead and interference measurement-based scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple panels are used for simultaneous transmission to increase data rate and capacity, then the transmission capacity and data rate are improved, but the signaling overhead and system complexity increase
Solution Approach 1:
The patent combines multiple SRS resource indicators into a single SRI field in DCI format 0_1, allowing simultaneous indication of multiple SRS resources for multi-panel transmission. This merging approach enables the system to indicate multiple panels and their corresponding SRS resources through one unified field, thereby reducing signaling overhead while maintaining the capability to support simultaneous transmission across multiple panels.
Solution Approach 2:
The SRI field is designed to serve multiple functions: it indicates SRS resources for codebook-based PUSCH transmission, identifies panels for multi-panel transmission, and provides SRS resource indicator for interference measurement. This multi-functional design allows the same field to handle various aspects of multi-panel transmission without requiring separate signaling mechanisms for each function.
2Productivity
If multiple panels are used for simultaneous transmission to handle increasing data traffic, then the data rate and throughput are improved, but the interference management complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the UE transmits SRS (sounding reference signal) on multiple panels, and the gNB measures the interference and channel conditions on each panel. The gNB then uses the SRI field to indicate the selected SRS resources and panels for PUSCH transmission, providing feedback-based interference management that adapts to the actual channel conditions and interference levels on each panel.
3Manufacturing precision
If detailed configuration information is provided for each panel to improve transmission precision, then the transmission precision and reliability are improved, but the signaling overhead increases
Solution Approach 1:
The patent employs a nested structure where SRS resources are organized in groups, with each SRS resource set containing multiple SRS resources. The SRI field in DCI format 0_1 can indicate multiple SRS resources from different SRS resource sets, allowing the system to select and combine resources at different levels of the nested structure. This nested organization enables precise control over multi-panel transmission by selecting specific resources within groups while avoiding the need to signal every individual resource parameter separately.
Data Source
AI summary
A method of transmitting, by a user equipment (UE), a physical uplink shared channel (PUSCH) in a wireless communication system is disclosed. The method comprises receiving configuration information related to the PUSCH, receiving downlink control information (DCI) scheduling the PUSCH, and transmitting the PUSCH based on the DCI. The DCI includes a specific field. Based on that the specific field represents at least one SRS resource related to a simultaneous transmission across multi-panel (ST×MP), the PUSCH is transmitted based on a plurality of panels.