Sidelink PRS Transmission Using SL BWP and Measurement Gaps
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently performing sidelink (SL) communication due to measurement gaps that hinder positioning reference signal (PRS) transmission, particularly in scenarios requiring enhanced mobile broadband and ultra-reliable low latency communication.
Innovation Solution
The method involves obtaining information about SL bandwidth parts (BWPs) and measurement gap periods, selecting these for PRS transmission based on a narrower bandwidth threshold, and performing positioning using the selected SL BWP or measurement gap period to allow PRS transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement gap period is used for positioning, then positioning accuracy is improved, but SL data transmission is blocked during the measurement gap
Solution Approach 1:
The patent segments the sidelink communication resources by introducing separate measurement gap periods within the SL BWP structure. This allows the system to divide time resources into positioning-specific gaps and normal data transmission periods, enabling simultaneous positioning measurements and data communication without mutual interference.
Solution Approach 2:
The patent introduces a time-dimensional structure by configuring measurement gap periods within the SL BWP timeframe. This temporal dimension allows the system to schedule PRS transmissions during specific gap periods while maintaining continuous SL data transmission in non-gap periods, resolving the conflict between positioning accuracy and data throughput.
2Reliability
If SL BWP with narrow bandwidth is selected, then measurement gap formation is optimized, but communication capacity is reduced
Solution Approach 1:
The patent implements dynamic BWP configuration where the network can switch between different SL BWP bandwidths based on service requirements. When positioning is prioritized, a narrower BWP with optimized measurement gaps is activated; when data capacity is prioritized, a wider BWP is activated. This dynamic adaptation resolves the contradiction between measurement optimization and communication capacity.
Solution Approach 2:
The patent changes the bandwidth parameter of the SL BWP based on the selected transmission scheme. By configuring different BWP bandwidths (e.g., narrow BWP for positioning-optimized mode, wide BWP for capacity-optimized mode), the system can adjust communication parameters to match service requirements, thereby resolving the trade-off between measurement gap efficiency and overall capacity.
3Reliability
If measurement gap period is configured for PRS transmission, then positioning reliability is improved, but transmission latency increases
Solution Approach 1:
The patent implements periodic measurement gap configurations where PRS transmissions occur at regular intervals within predefined gap periods. This periodic structure allows the system to maintain reliable positioning measurements while controlling the frequency and duration of gaps, thereby managing latency impacts through optimized periodic scheduling rather than continuous interruptions.
Data Source
AI summary
A method of operating a first device 100 in a wireless communication system is proposed. The method may comprise: obtaining information related to SL BWP; obtaining information regarding a measurement gap period, in which a transmission of SL data is not allowed, related to positioning of the first device; selecting the SL BWP or the measurement gap period, for use in a transmission of a PRS; transmitting the PRS based on the selected SL BWP or measurement gap period; and performing the positioning based on the PRS.