User Equipment PRS Measurement Bandwidth Adaptation
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Solution Overview
Problem
Existing wireless communication systems, particularly in 5G NR, face challenges in minimizing user equipment (UE) requested positioning reference signal (PRS) measurement gaps, which can lead to increased latency and power consumption during positioning operations.
Innovation Solution
The proposed solution involves a method where the UE measures at least one quality metric associated with one or more channels for PRSs and adjusts its measuring bandwidth based on these metrics. If the PRS bandwidth exceeds the active bandwidth part (ABWP), the UE can measure a subset of the PRS bandwidth that overlaps with the ABWP, thereby reducing the need for measurement gaps and retuning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE measures PRSs using a bandwidth greater than the active bandwidth part (ABWP), then positioning accuracy is improved, but measurement gaps and retuning gaps increase
Solution Approach 1:
The patent applies partial action by having the UE measure only a subset of PRS bandwidth resources that fall within the active bandwidth part, rather than measuring the entire PRS bandwidth. This selective measurement approach achieves sufficient positioning accuracy while avoiding the need for bandwidth retuning and measurement gaps.
Solution Approach 2:
The patent changes the measurement parameter from full bandwidth to partial bandwidth by identifying and measuring only those PRS resources whose bandwidth overlaps with the active bandwidth part. This parameter change allows continuous measurement without retuning while maintaining acceptable positioning precision.
2Adaptability or versatility
If the UE frequently changes bandwidth to match PRS bandwidth requirements, then positioning measurement capability is improved, but power consumption increases
Solution Approach 1:
The patent applies preliminary action by having the network configure multiple bandwidth parts in advance, including an active bandwidth part and additional bandwidth parts. The UE can switch between pre-configured bandwidth parts without requiring full retuning, thereby reducing power consumption while maintaining adaptability to different PRS bandwidth requirements.
Solution Approach 2:
The patent implements dynamic bandwidth part switching where the UE can transition between pre-configured bandwidth parts based on positioning requirements. This dynamic approach allows the UE to adapt to different PRS bandwidth needs while avoiding the high power consumption associated with frequent full retuning operations.
3Reliability
If the UE requests measurement gaps for PRS measurements, then measurement reliability is improved, but positioning latency increases
Solution Approach 1:
The patent applies self-service by enabling the UE to autonomously identify which PRS resources fall within the active bandwidth part and perform measurements on those resources without requiring network-configured measurement gaps. This self-service approach maintains measurement reliability for in-band resources while eliminating the latency introduced by measurement gap scheduling.
4Measurement precision
If the UE measures all PRS bandwidth resources, then positioning precision is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the total PRS bandwidth resources into multiple bandwidth parts and having the UE measure only the segment that falls within the active bandwidth part. This segmentation reduces measurement processing complexity by focusing computational resources on a subset of resources while maintaining sufficient positioning precision through selective measurement.
Data Source
AI summary
Aspects presented herein may enable a UE to measure a subset of a bandwidth of PRSs, such that the UE may measure the PRSs without retuning bandwidth. In one aspect, a UE measures at least one quality metric associated with one or more channels for one or more PRSs. The UE receives, from a base station, the one or more PRSs via the one or more channels. The UE measures the one or more PRSs using at least one measuring BW of a plurality of measuring BWs, the plurality of measuring BWs being based on at least one of the measured at least one quality metric meeting a quality metric threshold, a BW for the one or more PRSs being greater than or outside of a BW for an ABWP, or a UE system BW being greater than the BW for the one or more PRSs.