Sidelink Positioning Reference Signal Configuration for Flexible UE Ranging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems lack flexibility and efficiency in communication structures, particularly in the context of the 3GPP's LTE and NR standards, which are not optimized for scenarios like enhanced Mobile BroadBand (eMBB), massive Machine Type Communication (mMTC), and Ultra Reliable and Low Latency Communication (URLLC).
Innovation Solution
The implementation of sidelink positioning methods using user equipment (UE) for transmitting and receiving reference signals and parameters, enabling measurements and data exchange to enhance communication flexibility and efficiency, particularly through the use of OFDM symbols, CP-OFDM, and DFT-s-OFDM in downlink and uplink transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional communication structures are used in LTE and NR systems, then basic communication functionality is maintained, but flexibility and efficiency are limited
Solution Approach 1:
The patent implements dynamic communication structures where user equipment can be configured with different TDD-UL-DL configurations and slot formats based on traffic requirements. The system allows dynamic switching between different communication modes (sidelink positioning, uplink/downlink data transmission) within the same cell, enabling adaptability to varying service demands while maintaining efficient resource utilization
Solution Approach 2:
The patent enables user equipment to perform multiple functions simultaneously - acting as both a regular data transmission device and a positioning reference signal receiver/transmitter. The same time-frequency resources can be used for different purposes (data communication and positioning), and the system supports both traditional uplink/downlink modes and sidelink positioning modes within a unified framework
2Reliability
If communication structures are optimized for specific scenarios like eMBB, mMTC, or URLLC, then performance in those scenarios improves, but versatility across multiple scenarios decreases
Solution Approach 1:
The patent employs parameter-based configuration where different TDD-UL-DL configurations (0-6), slot formats (0-31), and subcarrier spacing values can be assigned to different user equipment or time periods. This allows the system to optimize parameters for specific scenarios (e.g., larger subcarrier spacing for URLLC, different slot formats for eMBB) while maintaining the capability to switch to other parameter sets for different scenarios, achieving both scenario optimization and multi-scenario support
3Measurement precision
If existing reference signal methods are used, then basic positioning functionality is provided, but measurement precision and positioning accuracy are limited
Solution Approach 1:
The patent implements preliminary configuration of TDD-UL-DL configurations and slot formats before positioning measurements are performed. The network configures user equipment with appropriate reference signal resources and time-frequency patterns in advance, allowing the equipment to be properly prepared for high-precision measurements. This preliminary setup enables accurate positioning measurements without requiring complex real-time adjustments during the measurement process
Data Source
AI summary
A user equipment (UE) is described. The UE may comprise reception circuitry configured to receive, a higher layer message including a configuration of sidelink positioning reference signal (SL-PRS) for a sidelink positioning and configured to receive the SL-PRS from a second CE based on the configuration of the SL-PRS; wherein the configuration of SL-PRS is a configuration per resource pool for SL-PRS transmission.