Sidelink Positioning Resource Pools for Wideband Reference Signals
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Solution Overview
Problem
The limited bandwidth and resource pool configuration in sidelink (SL) transmissions in 5G networks restricts the achievable positioning accuracy, as current resource pools are insufficient for transmitting wideband reference signals required for high-accuracy positioning, and existing techniques for bandwidth expansion involve complex network coordination.
Innovation Solution
A method for inter-pool resource allocation allows a UE to dynamically request and reserve resources across multiple sidelink resource pools for sidelink positioning reference signals, enabling wideband transmissions without extensive network coordination, by utilizing existing sidelink resources through direct terminal device communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current sidelink resource pools are used for positioning, then device complexity and network coordination are reduced, but positioning accuracy and bandwidth are insufficient
Solution Approach 1:
The patent divides the sidelink resource allocation into separate transmission resource pools and reception resource pools. The transmitting UE selects resources from a transmission resource pool while the receiving UE monitors a reception resource pool, which may overlap or be separate. This segmentation allows independent optimization of transmission and reception resources for positioning accuracy without increasing overall system complexity.
Solution Approach 2:
The patent introduces a new dimension of resource pool configuration by allowing transmission and reception resource pools to be configured independently with different time-frequency structures. The transmitting UE can use one set of resource pools for SL-PRS transmission while the receiving UE uses (potentially different) resource pools for monitoring, enabling wideband positioning references without requiring all UEs to use identical complex configurations.
2Measurement precision
If multiple resource pools are used for wideband transmissions, then positioning accuracy improves, but device complexity and coordination overhead increase
Solution Approach 1:
The patent enables UEs to autonomously select and use resources from configured resource pools for positioning without requiring real-time network coordination. The transmitting UE independently selects resources from its configured transmission resource pool, and the receiving UE independently monitors its configured reception resource pool. This self-service mechanism achieves wideband positioning accuracy while maintaining operational simplicity.
Solution Approach 2:
The network pre-configures transmission and reception resource pools for positioning before actual positioning operations. These resource pools are configured with appropriate bandwidth and time-frequency structures to support wideband SL-PRS. By performing this configuration action in advance, the system enables high-accuracy positioning while avoiding complex real-time coordination during positioning operations.
3Adaptability or versatility
If resource pools are configured for both transmission and reception, then communication versatility improves, but resource wastage and energy consumption increase
Solution Approach 1:
The patent applies different resource pool configurations to different UEs based on their specific roles and requirements. Transmitting UEs are configured with transmission resource pools optimized for SL-PRS transmission, while receiving UEs are configured with reception resource pools optimized for monitoring. This local quality approach ensures each UE uses resources appropriate to its function, improving communication versatility while reducing energy consumption compared to universal resource pool configuration.
Data Source
AI summary
The disclosure inter alia relates to a first terminal device configured for sidelink communication in a first sidelink resource pool, the first terminal device comprising means for—receiving resource pool information related to a second sidelink resource pool configured for a second terminal device; —transmitting, via sidelink communication, a request to the second terminal device to reserve resources in the second sidelink resource pool for transmission, by the first terminal device, of a sidelink positioning reference signal:—receiving, via sidelink communication, a response to the request from the second terminal device; and—based on the response, transmitting a sidelink positioning reference signal using resources in the first sidelink resource pool and resources in the second sidelink resource pool.