Dynamic SRS Path Loss Reference Signal Selection
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Solution Overview
Problem
The current method for configuring path loss reference signals for PUSCH and SRS resources in wireless communication systems involves semi-static RRC signaling, leading to large configuration latency and significant signaling overhead, which can cause service interruptions when path loss changes.
Innovation Solution
A method and device for determining reference signals in User Equipment (UE) that allows for dynamic configuration of SRS resource sets using first configuration information, where the configuration includes indication information for selecting a reference signal source, enabling efficient estimation of path loss without the need for frequent RRC reconfigurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If semi-static RRC signaling is used to configure path loss reference signals, then configuration reliability is maintained, but configuration latency increases and service continuity deteriorates
Solution Approach 1:
The patent applies dynamics by enabling the path loss reference signal to switch between different sources (CSI-RS and SSB) based on current channel conditions and network state. This dynamic selection allows the system to adapt to changing environments without requiring full RRC reconfiguration, thereby reducing latency while maintaining reliability through flexible, condition-based signal source selection.
Solution Approach 2:
The patent changes the parameter of reference signal source selection by introducing indication information that dynamically points to different reference signal sources. This parameter change mechanism allows the system to switch between CSI-RS and SSB based on path loss characteristics, achieving fast adaptation without the overhead of semi-static RRC signaling while preserving configuration reliability.
2Measurement precision
If semi-static RRC signaling is used to configure path loss reference signals, then configuration accuracy is maintained, but signaling overhead increases
Solution Approach 1:
The patent extracts the essential function of path loss reference signal configuration from the bulky semi-static RRC signaling framework. By separating the reference signal source selection (indicated through compact indication information) from the detailed RRC configuration, the system maintains path loss estimation accuracy while significantly reducing signaling overhead. The indication information points to pre-configured reference signals, eliminating the need for repeated detailed configuration messaging.
3Adaptability or versatility
If frequent RRC reconfiguration is performed to adapt to path loss changes, then system adaptability improves, but service interruption increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple reference signal sources (CSI-RS and SSB) before they are needed. The indication information then simply points to the appropriate pre-configured source based on current conditions, avoiding the need for frequent RRC reconfiguration. This preliminary setup enables rapid adaptation to path loss changes while maintaining service continuity, as the switching mechanism requires minimal signaling and processing.
Data Source
AI summary
A reference signal determination method includes: receiving, by UE, first configuration information. The first configuration information is used for determining configuration information of a Sounding Reference Signal (SRS) resource set, the configuration information of the SRS resource set includes first indication information for indicating an index of a first reference signal source, and the first reference signal resource is used for estimating a pathloss of a first SRS resource of the SRS resource set.