SRS Resource Set Configuration for Analog Channel State Feedback
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Solution Overview
Problem
Current wireless communication technologies, such as LTE and NR, face challenges in efficiently configuring sounding reference signal resource sets for analog channel state feedback, which is essential for improving spectral efficiency and user equipment performance.
Innovation Solution
The proposed method involves configuring a UE to receive a configuration indicating a sounding reference signal (SRS) resource set for analog channel state feedback and associating it with a set of downlink channel state information reference signals (CSI-RSs). The UE then measures the CSI-RSs and transmits SRSs using the configured resource set for feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional wireless communication technologies are used for channel state feedback, then existing protocols can be maintained, but spectral efficiency and user equipment performance cannot be optimized
Solution Approach 1:
The patent changes the parameters of SRS resource set configuration by introducing a new parameter 'srs-usage' with value 'analog-CSF' and establishing an association between SRS resource sets and downlink CSI-RS. This allows the system to optimize spectral efficiency through enhanced analog channel state feedback while maintaining compatibility with existing LTE/NR protocols.
Solution Approach 2:
The patent makes the SRS resource set configuration multi-functional by enabling it to serve both traditional uplink channel estimation and new analog channel state feedback purposes. The same SRS resources can be configured for different usages, allowing the system to maintain versatility while improving spectral efficiency.
2Measurement precision
If SRS resource set is configured for analog CSF, then channel state feedback accuracy is improved, but configuration complexity increases
Solution Approach 1:
The patent merges the configuration of SRS resource sets with existing downlink CSI-RS configuration by establishing an association between them. Instead of creating a completely separate configuration system, the patent combines analog CSF configuration with existing resource set configurations, thereby improving measurement precision while limiting the increase in configuration complexity.
Solution Approach 2:
The patent introduces an intermediary association mechanism that links SRS resource sets with downlink CSI-RS. This intermediary relationship allows the system to derive analog channel state information from existing downlink measurements, improving feedback accuracy without requiring entirely new complex configuration procedures.
3Productivity
If detailed SRS resource set configuration is provided, then analog channel state feedback performance is enhanced, but signaling overhead increases
Solution Approach 1:
The patent applies partial configuration by providing only the necessary parameters for analog CSF functionality. Instead of configuring all possible SRS parameters, the system selectively configures only the essential elements (srs-usage='analog-CSF' and association with downlink CSI-RS), thereby enhancing communication performance while minimizing signaling overhead.
Solution Approach 2:
The patent makes existing configuration structures multi-functional so they can serve both traditional purposes and analog CSF. By reusing existing SRS resource set configurations and downlink CSI-RS for dual purposes, the system avoids the need for entirely separate configuration signaling, thus reducing overhead while maintaining performance enhancement.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration that indicates a sounding reference signal (SRS) resource set to be used for analog channel state feedback (CSF) and an association between the SRS resource set and a set of downlink channel state information reference signals (CSI-RSs). The UE may measure the set of downlink CSI-RSs associated with the SRS resource set. The UE may transmit one or more SRSs for analog CSF using the SRS resource set and based at least in part on measuring the set of downlink CSI-RSs. Numerous other aspects are provided.