Aperiodic SRS Triggering Without Data Scheduling in Wireless Uplink
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently triggering aperiodic sounding reference signals (SRS) without data scheduling, which can lead to inefficiencies in resource allocation and communication performance.
Innovation Solution
Implementing aperiodic SRS triggering mechanisms using radio resource control (RRC) configurations and downlink control information (DCI) to enable SRS triggering without data scheduling, allowing for more flexible and efficient resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If aperiodic SRS triggering is implemented without data scheduling, then resource allocation efficiency is improved and communication performance is enhanced, but system complexity increases due to additional RRC configuration and DCI mechanisms
Solution Approach 1:
The DCI format is designed to serve multiple functions: it can trigger aperiodic SRS transmissions, indicate SCell dormancy status, and provide uplink grant information when needed. This multi-functionality allows the system to achieve efficient resource allocation without requiring separate dedicated signaling mechanisms, thereby improving productivity while controlling complexity.
Solution Approach 2:
The invention utilizes existing DCI parameters and fields (such as SRS request field, SCell dormancy indication field) and repurposes or modifies their functions through RRC configuration. By changing the interpretation and usage of existing parameters rather than introducing entirely new signaling structures, the system achieves flexible aperiodic SRS triggering while avoiding excessive complexity increases.
2Adaptability or versatility
If RRC configuration with high layer parameters is used to enable aperiodic SRS triggering, then flexibility and adaptability are improved, but configuration overhead and setup time increase
Solution Approach 1:
The RRC configuration预先 establishes the framework and parameters for aperiodic SRS triggering, including configuring DCI formats, SRS resource sets, and association relationships. This preliminary configuration allows the system to operate flexibly during runtime without requiring frequent reconfiguration, as the basic structure is prepared in advance while maintaining adaptability through DCI-based dynamic triggering.
Solution Approach 2:
The configuration is divided into two layers: RRC layer for static/framework parameters and DCI layer for dynamic/trigging parameters. This segmentation allows the system to maintain flexibility through DCI while reducing configuration overhead by only updating necessary parameters at each layer, rather than reconfiguring the entire system.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, a radio resource control (RRC) configuration with one or more high layer parameters that enable one or more of an aperiodic sounding reference signal (SRS) triggering without data scheduling or a secondary cell (SCell) dormancy indication using downlink control information (DCI). The UE may receive, from the base station and based at least in part on the RRC configuration, DCI that is associated with at least one of: the aperiodic SRS triggering without data scheduling or the SCell dormancy indication. The UE may transmit, to the base station, an aperiodic SRS based at least in part on the DCI that triggers the aperiodic SRS. Numerous other aspects are described.