Sidelink PRS Scheduling Within DRX Active Time for Positioning
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Solution Overview
Problem
The increasing demand for mobile broadband communication and the need for enhanced reliability and low latency in wireless communication systems, particularly in sidelink (SL) communication, have not been adequately addressed by existing Radio Access Technologies (RATs, such as LTE and 5G NR, especially in scenarios like vehicle-to-everything (V2X) communication.
Innovation Solution
A method and device for performing wireless communication that involves obtaining a sidelink (SL) discontinuous reception (DRX) configuration and SL positioning reference signal (PRS) configuration, enabling the transmission of SL PRSs to enhance communication efficiency and reliability, with a time interval defined by the DRX configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If SL DRX configuration is applied to reduce active time, then energy consumption is reduced, but positioning accuracy may deteriorate
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple SL PRS resources and their corresponding time resources before positioning measurements are needed. The UE can quickly activate and transmit/receive PRS signals within the DRX active time without delay, ensuring positioning accuracy is maintained while energy consumption is reduced through the DRX mechanism.
Solution Approach 2:
The patent implements dynamics by making the PRS transmission and reception adaptable to the DRX active time periods. The UE dynamically adjusts its PRS operations to coincide with active time windows, allowing the system to flexibly balance between energy saving (during sleep periods) and positioning accuracy (during active periods).
2Measurement precision
If multiple SL PRS resources are configured, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a unified configuration framework where multiple SL PRS resources are managed through a single set of configuration parameters. The same DRX configuration and resource allocation mechanisms handle all PRS resources, allowing the system to achieve high positioning accuracy through multiple resources without proportionally increasing device complexity.
3Reliability
If SL PRS transmission is performed during DRX active time, then positioning reliability is improved, but communication efficiency may worsen
Solution Approach 1:
The patent applies parameter changes by optimizing the timing and duration of DRX active periods to align with SL PRS transmission requirements. By adjusting DRX parameters such as active time length and periodicity, the system ensures reliable positioning measurements can be completed within active periods while minimizing the impact on overall communication efficiency and data throughput.
Data Source
AI summary
Provided are a method for performing wireless communication by a first device and a device supporting the method. The method may comprise the steps of: obtaining a sidelink (SL) discontinuous reception (DRX) configuration; obtaining an SL positioning reference signal (PRS) configuration; transmitting a first SL PRS to a second device on the basis of the SL PRS configuration; and transmitting a third SL PRS to the second device on the basis of the SL PRS configuration. For example, a time interval from the time associated with the first SL PRS to the time associated with the third SL PRS may be an active time of the first device associated with the SL DRX configuration.