SRS Resource Configuration via DCI for Uplink Transmission
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing uplink transmission resources, particularly in configuring and indicating Sounding Reference Signal (SRS) resources, which leads to increased signaling overhead and decoding complexity.
Innovation Solution
A method for configuring and indicating SRS resources by using SRS resource indicators (SRI) within Downlink Control Information (DCI), allowing for codebook-based or non-codebook based transmissions, and incorporating information on antenna port usage and switching, reducing signaling overhead and improving decoding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If SRS resources are configured and indicated separately from DCI, then SRS configuration flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent combines SRS resource indication with DCI by embedding SRI (Sounding Reference Signal Indicator) fields directly within the DCI structure. This merging allows SRS resource selection to be performed through existing DCI signaling channels, eliminating the need for separate SRS configuration messages and reducing overall signaling overhead while maintaining configuration flexibility.
Solution Approach 2:
The DCI structure is enhanced to serve multiple functions: it simultaneously provides uplink scheduling information and SRS resource indication through integrated SRI fields. This multi-functionality allows a single signaling message to accomplish both data transmission scheduling and reference signal resource allocation, reducing the total number of signaling messages required.
2Adaptability or versatility
If multiple SRS resources are configured for different usages, then transmission versatility is improved, but decoding complexity increases
Solution Approach 1:
The patent segments SRS resources into distinct usage categories (e.g., codebook-based uplink transmission, non-codebook based uplink transmission, antenna switching) and assigns specific SRI fields or interpretations to each category. This segmentation allows the UE to selectively process only the relevant SRS resources for a given transmission type, reducing decoding complexity while maintaining versatility across different transmission modes.
Solution Approach 2:
Different SRI field configurations and interpretations are applied locally to specific DCI formats or scheduling scenarios based on the required transmission type. Instead of uniformly processing all SRS resources in all scenarios, the system applies quality-specific processing rules that match the local transmission requirements, thereby reducing unnecessary decoding operations.
3Quantity of substance
If SRS resource indication is embedded in DCI, then signaling overhead is reduced, but DCI structure complexity increases
Solution Approach 1:
The DCI structure is designed to be dynamic, with SRI fields that are selectively included or interpreted based on the scheduling scenario and transmission type. The presence, size, and interpretation of SRI fields can vary depending on the DCI format and configured SRS resource sets, allowing the structure to adapt to different scenarios without requiring a completely new DCI design for each case.
Data Source
AI summary
The present disclosure provides a method for performing uplink transmission in a wireless communication system. More specifically, in a method for transmitting uplink data, the method performed by a UE comprises receiving, from a base station, configuration information on a Sounding Reference Signal (SRS); receiving, from the base station, Downlink Control Information (DCI) for transmission of the uplink data; and transmitting, to the base station, the uplink data based on the DCI, wherein the DCI includes an SRS resource for the transmission of the uplink data and information on timing related to an antenna port configured for the SRS resource, and wherein the configuration information includes information on first usage of the SRS resource related to the transmission of the uplink data and information on second usage of the SRS resource related to antenna switching.