Multiple-Reference-Signal BWP Configuration for Gap-Free Positioning
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently configuring bandwidth parts (BWPs) for the communication of multiple reference signals used in positioning, leading to inefficiencies and potential interference with data traffic.
Innovation Solution
A method and apparatus for configuring a second BWP with a different bandwidth than the first BWP to accommodate the communication of multiple reference signals, such as PRS and SRS-P, using explicit or implicit indications via RRC signaling, MAC CE, or DCI, allowing for simultaneous data traffic and positioning measurements without measurement gaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single BWP configuration is used for both data traffic and positioning reference signals, then device complexity is reduced, but positioning measurement precision deteriorates due to interference and inability to perform measurements without gaps
Solution Approach 1:
The patent divides the bandwidth into separate BWP configurations: a first BWP for data traffic and a second BWP for positioning reference signals. This segmentation allows independent optimization of each function, enabling precise positioning measurements without interference from data traffic while maintaining manageable device complexity through structured configuration management.
Solution Approach 2:
The patent introduces a temporal dimension to BWP configuration by enabling dynamic switching between different BWP configurations based on whether positioning measurements are required. This allows the system to transition from a static single-BWP approach to a time-varying multi-BWP approach, resolving the contradiction between simplicity and measurement precision.
2Measurement precision
If measurement gaps are introduced for positioning measurements, then positioning measurement precision improves, but communication productivity deteriorates due to interrupted data traffic
Solution Approach 1:
The patent enables continuous data traffic communication by configuring a dedicated second BWP for positioning reference signals that operates simultaneously with the first BWP for data traffic. This allows positioning measurements to be performed continuously without interrupting data traffic, maintaining both high measurement precision and communication productivity through parallel operation.
3Measurement precision
If multiple BWP configurations are used for simultaneous data traffic and positioning measurements, then positioning measurement precision improves, but device complexity increases
Solution Approach 1:
The patent implements dynamic BWP configuration where the second BWP for positioning can be activated or deactivated based on positioning requirements. This dynamic approach allows the system to maintain simple single-BWP operation during normal data traffic while switching to multi-BWP configuration only when positioning measurements are needed, thus improving measurement precision without permanently increasing device complexity.
Data Source
AI summary
In an aspect, a UE and BS communicate data traffic in accordance with a first bandwidth part (BWP) configuration. The BS sends, to the UE in association with communication of a plurality of reference signals for positioning (e.g., PRS, SRS-P, etc.), an indication of a second BWP configuration that includes a different bandwidth than the first BWP configuration. The UE and BS communicate, for a duration of the communication of the plurality of reference signals for positioning, at least the plurality of reference signals for positioning in accordance with the second BWP configuration.