Aperiodic SRS Triggering Flexibility in 5G NR
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current 5G new radio (NR) technologies face limitations in enhancing Aperiodic Sounding Reference Signal (SRS) transmission, particularly in terms of flexibility and efficiency, especially in Frequency Range 1 and 2, and require improvements in triggering mechanisms to reduce Downlink Control Information (DCI) overhead and enhance SRS capacity and coverage.
Innovation Solution
The proposed solution involves configuring Aperiodic SRS transmission based on received configuration parameters, reporting minimum timing requirements between SRS triggering and Physical Downlink Control Channel (PDCCH) resources, and introducing additional flexibility through new DCI fields and higher-layer signaling to optimize SRS resource allocation and timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If aperiodic SRS triggering is configured using existing DCI mechanisms, then SRS transmission can be triggered dynamically, but DCI overhead increases and triggering flexibility is limited
Solution Approach 1:
The patent segments the SRS triggering mechanism by introducing separate DCI fields for triggering indications and resource set configurations. This allows the DCI to be divided into functional components, where the trigger field activates SRS transmission while resource allocation details are handled through separate configuration parameters, thereby reducing the overall DCI overhead while maintaining triggering flexibility.
Solution Approach 2:
The patent introduces a new dimension to SRS triggering by adding specific DCI fields that operate alongside existing triggering mechanisms. This dimensional expansion allows for more granular control over SRS transmission without requiring complete reconfiguration of the existing DCI structure, enabling enhanced flexibility without proportional increases in overhead.
2Quantity of substance
If SRS resource allocation is optimized for advanced MIMO configurations, then SRS capacity and coverage improve, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring SRS resource sets with specific parameters including timing requirements and antenna port configurations. This pre-configuration allows the system to handle advanced MIMO scenarios without requiring complex real-time calculations, as the resource allocation framework is established in advance to support up to 8 antennas and various MIMO modes.
Solution Approach 2:
The patent utilizes parameter changes by introducing configurable parameters for SRS resource sets, including minimum timing requirements, antenna port counts, and frequency domain configurations. These parameter adjustments enable the system to adapt to different MIMO configurations (such as 4x4, 8x8) without fundamentally changing the system architecture, thereby improving SRS capacity while controlling complexity through parameterization.
Data Source
AI summary
A wireless communication method for a terminal includes: receiving, via downlink control information (DCI) or higher layer signaling, configuration information including a parameter, configuring Aperiodic Sounding Reference Signal (A-SRS) transmission based on the parameter; and reporting, based on a usage setting, capability information including a minimum timing requirement between A-SRS triggering Physical Downlink Control Channel (PDCCH) and SRS resources in a resource set.