Sidelink UE Multiplexing Data and Positioning Reference Signals
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Solution Overview
Problem
Current wireless communication systems lack procedures for simultaneous transmission of data messages and positioning reference signals (PRS) bursts by sidelink user equipment (UE), leading to inefficiencies in resource allocation and positioning accuracy.
Innovation Solution
The described techniques enable sidelink UE to multiplex sidelink data messages with sidelink PRS bursts by identifying PRS burst patterns and scheduling data transmission around PRS resources, allowing for coordinated transmission with other UEs through sidelink control information messages, and providing rate-matching or puncturing maps for receiving UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sidelink UE transmits data messages and PRS bursts simultaneously using separate resources, then resource utilization improves, but resource allocation complexity increases
Solution Approach 1:
The patent merges data message transmission and PRS burst transmission into a single multiplexed signal transmitted over the same time-frequency resources. The UE combines both signals through multiplexing, allowing simultaneous transmission without requiring separate resource allocation procedures, thus improving resource utilization while maintaining manageable complexity through standardized multiplexing operations.
Solution Approach 2:
The patent enables the sidelink transmission mechanism to serve multiple functions simultaneously - both data communication and positioning reference signal transmission. By designing the multiplexing scheme to handle both signal types through a unified resource allocation framework, the system achieves multi-functionality without proportionally increasing allocation complexity.
2Productivity
If sidelink UE multiplexes data messages with PRS bursts, then transmission efficiency improves, but positioning accuracy may deteriorate
Solution Approach 1:
The patent applies local quality by ensuring that the PRS signal components maintain their specific signal characteristics and properties even when multiplexed with data. The multiplexing scheme preserves the local signal quality of PRS bursts by using orthogonal or pseudo-orthogonal multiplexing methods that prevent data signal interference from degrading the positioning reference signal quality, thus maintaining positioning accuracy while achieving transmission efficiency.
3Reliability
If sidelink UE coordinates with other UEs for PRS burst patterns, then interference management improves, but signaling overhead increases
Solution Approach 1:
The patent implements preliminary action by having UEs exchange and coordinate PRS burst patterns in advance before actual transmission occurs. Through preliminary coordination using SCI messages, UEs establish their PRS transmission schedules beforehand, allowing receiving UEs to prepare appropriate rate-matching or puncturing patterns. This advance coordination reduces actual transmission interference while minimizing signaling overhead by establishing patterns once rather than continuously negotiating during transmission.
4Measurement precision
If data transmission is rate-matched around PRS resources, then positioning signal quality improves, but data transmission efficiency decreases
Solution Approach 1:
The patent applies partial action by implementing rate-matching only for the specific resource elements occupied by PRS bursts, rather than excluding entire time-frequency resources. The data transmission is rate-matched around only the necessary PRS resources, preserving data transmission efficiency in non-PRS regions while ensuring sufficient positioning signal quality in PRS regions. This partial rate-matching approach avoids the excessive resource waste that would occur with complete resource exclusion.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may identify one or more sidelink positioning reference signal burst patterns identifying one or more bursts of sidelink positioning reference signals that are to be transmitted by either the UE or by other sidelink UEs. The UE may schedule transmission of a sidelink data message to occur during a same time period that includes the one or more bursts of sidelink positioning reference signals. The UE may transmit the sidelink data message via first resource elements that are different from second resource elements on which the one or more bursts of sidelink positioning reference signals are transmitted.