Active BWP Transition Management for 5G Positioning Accuracy
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Solution Overview
Problem
In wireless communication systems, particularly in 5G networks, there is a need to manage active bandwidth part (BWP) transitions during positioning sessions to ensure accurate and efficient PRS measurements without requiring gaps or scheduling restrictions, as existing methods may disrupt the measurement process.
Innovation Solution
A method is introduced to manage BWP transitions during positioning sessions by ensuring the active BWP includes the necessary bandwidth for PRS measurements, allowing seamless transitions without gaps or scheduling restrictions, thereby maintaining measurement continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the active BWP is changed during the measurement period, then the UE can adapt to different bandwidth requirements, but the PRS measurements become inaccurate or unavailable
Solution Approach 1:
The network determines the active BWP transition in advance by receiving indication information from the UE before the transition occurs. This allows the network to prepare and manage the transition properly, ensuring the BWP change is coordinated with the positioning measurement period and does not disrupt the measurements.
Solution Approach 2:
The UE provides feedback by sending indication information to the network entity about the active BWP transition. This feedback mechanism allows the network to be aware of the upcoming BWP change and adjust its behavior accordingly, ensuring continuous and accurate PRS measurements throughout the transition.
2Measurement precision
If measurement gaps are introduced for PRS measurements, then positioning accuracy can be maintained, but measurement continuity is disrupted and latency increases
Solution Approach 1:
The patent enables continuous PRS measurements without gaps by determining BWP transitions in advance and coordinating them with the measurement period. The UE can maintain continuous positioning measurements while the network manages BWP changes, eliminating the need for measurement gaps and reducing latency.
3Measurement precision
If the active BWP is restricted before PRS measurement period, then measurement accuracy is ensured, but spectral efficiency is reduced
Solution Approach 1:
The patent introduces dynamic BWP management where the active BWP can change during the measurement period based on real-time needs. The network determines transitions dynamically by receiving UE indications, allowing the system to adapt bandwidth allocation to actual measurement requirements rather than being restricted beforehand, thus improving spectral efficiency while maintaining accuracy.
Data Source
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AI summary
In an aspect, a UE receives, from a network entity, a configuration of PRS or SRSP resources for a positioning session, receives a configuration of at least one BWP from a serving BS, identifies a time-domain period for the positioning session where a set of parameters associated with the at least one BWP is to remain constant to achieve a first positioning accuracy requirement. The UE either performs positioning measurements on one or more of the PRS resources during the positioning session or transmits on one or more of the SRS-P resources during the positioning session. The UE determines an active BWP transition during the time-domain period from a first BWP to a second BWP that is associated with one or more changes to the set of parameters.