SRS Transmission Latency Control for 5G CSI Delay Reduction

The patent introduces dynamic adjustment of SRS transmission latency by defining a parameter K (number of slots between DCI triggering and SRS transmission) that can be flexibly configured through higher-layer signaling. This allows the system to adaptively adjust the transmission timing based on channel conditions and service requirements, transforming the fixed LTE mechanism into a dynamic 5G NR mechanism that balances CSI accuracy and delay.

The patent changes the key parameter from fixed timing in LTE to variable timing in 5G NR by introducing the K parameter (slot offset) and supporting multiple configurations (K=0, K=1, K=2, etc.). This parameter change enables flexible control over transmission latency, allowing the system to optimize CSI delay performance while maintaining accurate channel state information acquisition.

The patent segments the SRS transmission mechanism into configurable components: multiple SRS resource sets, different latency configurations (K values), and separate triggering mechanisms. This segmentation allows flexible combination of parameters to optimize spectrum efficiency for different service scenarios without requiring complete protocol redesign, maintaining reasonable complexity while enabling performance improvement.

The patent creates a universal SRS transmission framework that can serve multiple functions: aperiodic triggering for dynamic CSI acquisition, periodic transmission for continuous channel monitoring, and configurable latency adaptation for different service types (e.g., eMBB, URLLC). This multi-functional design improves spectrum efficiency across diverse scenarios while using a unified protocol structure.