Uplink SRS Power Configuration via Spatial Relation
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Solution Overview
Problem
Current wireless communication systems face challenges in determining and configuring optimal transmission power for uplink reference signals, particularly for positioning, due to the lack of explicit path-loss reference configuration, which affects the accuracy and reliability of signal transmission and reception.
Innovation Solution
The method involves receiving configuration information for a sounding reference signal (SRS) and determining its transmission power based on path-loss, utilizing spatial relation information between downlink and uplink reference signals, and employing path-loss references from synchronization signals or physical broadcast channels to ensure effective power configuration for positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If path-loss reference configuration is not explicitly provided for positioning SRS, then device operation ambiguity occurs and positioning accuracy deteriorates, but adding explicit configuration increases system complexity
Solution Approach 1:
The UE autonomously determines the path-loss reference for positioning SRS by selecting from available DL RS resources (SSB or CSI-RS) based on spatial relation information, without requiring explicit network configuration. This self-service mechanism resolves the ambiguity in device operation while maintaining positioning accuracy, as the UE can independently identify appropriate path-loss references from the configured spatial relations.
2Reliability
If transmission power for uplink reference signals is determined without explicit path-loss reference configuration, then power configuration reliability deteriorates, but requiring explicit configuration increases signaling overhead
Solution Approach 1:
Spatial relation information serves as an intermediary that links the uplink SRS to downlink reference signals (SSB or CSI-RS). Through this intermediary, the UE can reliably determine the path-loss reference for power calculation without direct explicit configuration, thereby maintaining power configuration reliability while avoiding additional signaling overhead for path-loss reference indication.
3Manufacturing precision
If spatial relation information is used to determine path-loss reference, then transmission power accuracy improves, but processing complexity increases
Solution Approach 1:
The network pre-configures spatial relation information between uplink SRS and downlink reference signals before the UE needs to determine transmission power. This preliminary action allows the UE to directly use the pre-established spatial relations to identify path-loss references, improving transmission power accuracy while minimizing processing complexity during actual power determination.
Data Source
AI summary
Various embodiments relate to a next-generation wireless communication system for supporting a data transmission rate or the like higher than that of a 4th generation (4G) wireless communication system. According to various embodiments, provided are a method for transmitting and receiving a signal in a wireless communication system, and an apparatus supporting same, and various other embodiments can also be provided.