PRS Resource Prioritization for SRS Positioning Accuracy
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Solution Overview
Problem
Conventional methods for prioritizing positioning reference signal (PRS) processing for sounding reference signals (SRS) in wireless communication systems often result in sub-optimal resource allocation, leading to inefficiencies due to the lack of consideration for time proximity and channel condition validity, which affects the accuracy of positioning measurements.
Innovation Solution
A method where the user equipment (UE) prioritizes PRS resources based on their role as reference signals for SRS, processing them in the measurement gap immediately prior to SRS transmission to ensure accurate channel conditions and reduce power consumption by avoiding default maximum transmission power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PRS resources are processed without prioritization based on time proximity to SRS transmission, then processing simplicity is maintained, but positioning measurement accuracy deteriorates due to obsolete channel conditions
Solution Approach 1:
The patent applies preliminary action by prioritizing the processing of PRS resources that are temporally close to SRS transmission occasions. The UE identifies and processes these specific PRS resources in advance of the SRS transmission, ensuring that channel conditions are current and accurate when needed for positioning measurements, thereby resolving the contradiction between measurement accuracy and processing simplicity
Solution Approach 2:
The patent applies local quality by differentiating the processing priority of different PRS resources based on their temporal relationship to SRS transmission. Instead of uniform processing, the UE applies enhanced processing specifically to PRS resources that are proximate to SRS occasions, while maintaining standard processing for others, thus improving accuracy where needed without unnecessarily increasing overall processing complexity
2Use of energy by moving object
If the UE transmits SRS at maximum power by default, then transmission reliability is improved, but power consumption increases unnecessarily when accurate channel conditions are already available
Solution Approach 1:
The patent applies dynamics by making the SRS transmission power adaptive rather than static. The UE dynamically adjusts transmission power based on the availability and quality of channel condition information from prioritized PRS processing. When accurate channel conditions are available from recently processed PRS resources, the UE can transmit at lower power while maintaining reliability, thus reducing power consumption without sacrificing transmission reliability
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) may receive first information identifying a plurality of positioning reference signal (PRS) resources. The UE may receive second information identifying a plurality of PRS measurement occasions in a time domain. The UE may receive third information identifying a plurality of sounding reference signals (SRSs) and their respective transmission occasions in the time domain. The UE may receive fourth information identifying, for each of the plurality of SRSs, one or more PRS resources as reference signals for the respective SRS. The UE may process PRS resources according to a prioritization scheme such that PRS resources that are reference signals for the respective SRS are prioritized over PRS resources that are not reference signals for the respective SRS.