PRS and DL Channel Collision Handling in RRC Inactive Mode
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently managing and prioritizing positioning reference signals (PRS) and downlink (DL) channels during RRC-inactive and idle states, leading to potential collisions and interference.
Innovation Solution
The proposed solution involves an apparatus that receives PRSs and DL channels during RRC-inactive or idle states, selects portions of these signals based on time thresholds, and processes them accordingly to avoid collisions and ensure priority handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the apparatus receives both PRS and DL channel in the same measurement period during RRC-inactive or idle state, then the quantity of received signals increases, but signal collision and interference occur
Solution Approach 1:
The patent segments the measurement period into distinct time resources for PRS and DL channel reception. By dividing the time-frequency resources and assigning specific slots to each signal type, the system can receive both PRS and DL channel without collision, as they occupy separate segmented time resources within the same measurement period.
Solution Approach 2:
The patent implements dynamic signal selection based on time threshold comparison. The apparatus dynamically determines whether to process PRS or DL channel by comparing the time difference between signals against a threshold, allowing flexible adaptation to varying signal conditions and preventing interference through real-time dynamic decision-making.
2Measurement precision
If the apparatus processes all received signals, then the measurement precision improves, but the processing time and complexity increase
Solution Approach 1:
The patent applies partial action by selectively processing only the most relevant signal based on time threshold comparison. Instead of processing all received signals equally, the apparatus identifies and processes the highest priority signal (either PRS or DL channel), achieving sufficient positioning accuracy with reduced processing time and computational resources.
Solution Approach 2:
The patent changes the processing parameter by dynamically adjusting which signal type is processed based on timing parameters. The apparatus uses time threshold as a decision parameter to switch between processing PRS or DL channel, optimizing the balance between measurement precision and processing efficiency by adapting to real-time signal conditions.
3Measurement precision
If the apparatus prioritizes PRS over DL channel, then positioning accuracy improves, but the reliability of DL channel reception decreases
Solution Approach 1:
The patent changes the priority parameter dynamically based on time threshold comparison. Instead of fixed prioritization, the apparatus adjusts which signal receives priority (PRS or DL channel) depending on whether the time difference exceeds the threshold, thereby maintaining both positioning accuracy and DL channel reliability under different operational conditions.
4Speed
If the apparatus uses a small time threshold for signal selection, then the processing speed increases, but the likelihood of signal collision increases
Solution Approach 1:
The patent optimizes the time threshold parameter to balance processing speed and collision avoidance. By carefully selecting the threshold value, the system achieves fast signal selection (high processing speed) while maintaining sufficient separation between PRS and DL channel processing, thereby minimizing signal collision risk without sacrificing processing efficiency.
Data Source
AI summary
Aspects presented herein may enable a UE to prioritize PRS and different DL channels in an RRC-inactive/idle state. In one aspect, a UE receives one or more PRSs and at least one DL channel in a measurement period and during an RRC-inactive state or an RRC-idle state, the one or more PRSs occupying a range of symbols that do not overlap with the at least one DL channel in time. The UE selects at least some portion of the one or more PRSs or at least some portion of the at least one DL channel for processing based on whether the range of symbols is within a time threshold of the at least one DL channel. The UE processes, based on the selection, the at least some portion of the one or more PRSs or the at least some portion of the at least one DL channel.