Sidelink Positioning Reference Signal Beam Mapping
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Solution Overview
Problem
In sidelink positioning scenarios, existing technologies face interference issues due to shared radio spectrum resources between sidelink and uplink/downlink communications, which affect positioning accuracy and quality of service.
Innovation Solution
The Location Management Function (LMF) coordinates sidelink positioning reference signals (PRS) by configuring and managing PRS transmissions between anchor and target UEs, mapping PRS configurations to specific radio beams to minimize interference and optimize resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sidelink positioning reference signals share radio spectrum resources with uplink/downlink communications, then resource utilization is improved, but interference increases and positioning accuracy deteriorates
Solution Approach 1:
The patent segments the positioning reference signal transmission by associating each SL-PRS configuration with specific uplink and downlink beam pairs. This segmentation allows different PRS transmissions to be assigned to different time-frequency resources based on their associated beams, reducing interference while maintaining resource utilization efficiency.
Solution Approach 2:
The patent implements dynamic selection of SL-PRS configurations based on observed uplink and downlink beam conditions. The user equipment dynamically determines which PRS configuration to use by measuring beam qualities and selecting the configuration associated with the best beam pair, thereby adapting to changing channel conditions and minimizing interference.
2Measurement precision
If multiple SL PRS configurations are provided and dynamically selected based on beam observations, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple SL-PRS configurations and associating each with specific uplink and downlink beam pairs before actual positioning operations. This pre-association simplifies the runtime decision process, as the user equipment only needs to measure beam qualities and select from pre-defined configurations rather than managing complex parameters dynamically.
3Reliability
If SL PRS configurations are mapped to UL/DL beams, then interference is reduced and positioning reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent makes the SL-PRS configuration information serve multiple functions: it defines the positioning reference signal parameters, associates the PRS with specific beam pairs for interference reduction, and provides the basis for dynamic selection. This multi-functionality reduces the need for separate signaling mechanisms, thereby reducing overall signaling overhead while maintaining positioning reliability.
Data Source
AI summary
Example embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media of sidelink positioning. The method comprises: receiving, from a network node, configuration information comprising at least one configuration of sidelink positioning reference signal and at least one identifier of at least one radio beam, wherein the sidelink positioning reference signal is transmitted between a first user equipment and a second user equipment; determining information for controlling a transmission of sidelink positioning reference signal from the first user equipment; transmitting, to the first user equipment, a message comprising the determined information; and receiving, from the first user equipment, the sidelink positioning reference signal.