UE Positioning Beam Configuration via Discovery Feedback
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Solution Overview
Problem
Conventional sidelink positioning methods in wireless communication systems are inefficient as they transmit positioning signals in all directions, consuming battery power and resources, even when only a subset of UEs are within range, due to the lack of directional beam control.
Innovation Solution
A method that separates positioning discovery and measurement phases, using wide beams for discovery and high bandwidth beams for measurement, where the UE determines a subset of beams to use based on feedback from other UEs, optimizing resource allocation and reducing power consumption by only transmitting necessary beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If positioning signals are transmitted in all directions using conventional sidelink positioning methods, then positioning coverage is maximized, but battery power consumption and resource usage increase significantly
Solution Approach 1:
The patent segments the positioning signal transmission into two distinct phases: a discovery phase using wide beams to identify potential target UEs, and a measurement phase using narrow beams for actual positioning measurements. This segmentation allows the system to transmit signals directionally rather than omnidirectionally, reducing energy consumption while maintaining positioning reliability.
Solution Approach 2:
The patent dynamically adjusts beam width based on the operational phase and proximity of target UEs. Wide beams are used during discovery phase for broad coverage, then transition to narrow beams during measurement phase for precise positioning. This dynamic beam adjustment optimizes the trade-off between coverage and energy consumption.
2Reliability
If positioning signals are transmitted in all directions to ensure comprehensive coverage, then all potential UEs can be detected, but transmission resources are wasted on UEs outside range
Solution Approach 1:
The patent performs a preliminary discovery phase before the actual measurement phase. During discovery, wide beams are transmitted to identify and map potential target UEs and their locations. This preliminary action allows the system to know which UEs are within range before committing to resource-intensive measurement transmissions, preventing waste on out-of-range UEs.
Solution Approach 2:
The system uses feedback from the discovery phase to determine which beams should be used for measurement. By monitoring which wide beams detect target UEs, the system can selectively activate narrow beams only for those directions where UEs are present, optimizing resource allocation and avoiding transmission waste.
3Device complexity
If a single beam configuration is used for both discovery and measurement phases, then system complexity is reduced, but positioning precision and efficiency are compromised
Solution Approach 1:
The patent segments the positioning operation into two phases with different beam requirements. The discovery phase uses wide beams for UE identification, while the measurement phase uses narrow beams for precise positioning. This segmentation allows each phase to use the optimal beam configuration for its specific purpose, improving overall positioning precision without excessive complexity.
Solution Approach 2:
The patent changes the beam parameter (beam width) between the two phases. Wide beam width is used during discovery phase for broad coverage, then switches to narrow beam width during measurement phase for high precision. This parameter change optimizes positioning accuracy while keeping the system manageable through clear phase differentiation.
Data Source
AI summary
Disclosed are techniques for wireless positioning. In an aspect, a user equipment (UE) may obtain a configuration that defines a first number of positioning measurement transmission beams, each positioning measurement transmission beam associated with a boresight transmission angle of the UE, and a second number of positioning discovery transmission beams, each positioning discovery transmission beam associated with a boresight transmission angle of the UE. The UE may transmit the positioning discovery transmission beams, then receive, from at least one other UE, feedback related to at least one of the positioning discovery transmission beams, and, based on that feedback, determine a subset of the positioning measurement transmission beams to be used for performing positioning measurements. The UE may perform the positioning measurements using the subset of the positioning measurement transmission beams.