Sidelink PRS Resource Mapping for In-Slot Positioning Accuracy
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Solution Overview
Problem
The challenge of multiplexing sidelink positioning reference signals (SL PRS) with sidelink signals/channels in the same slot during sidelink communication, particularly in scenarios outside cellular network coverage, remains unresolved.
Innovation Solution
A method for transmitting and receiving SL PRS by associating sidelink channel resources with SL PRS resources using specific time-frequency structures, allowing for efficient multiplexing and measurement, including autonomous and network-scheduled resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If SL PRS is multiplexed with sidelink signals/channels in the same slot, then positioning accuracy is improved, but resource conflict and interference occur
Solution Approach 1:
The patent segments the time-frequency resources by introducing specific time offsets between SL PRS and sidelink signals/channels. The SL PRS is transmitted in a separate resource block with a defined time gap from other sidelink transmissions, dividing the resource space to avoid overlap and interference while maintaining positioning functionality.
Solution Approach 2:
The patent resolves resource conflict by adding a time dimension to the resource allocation. Instead of competing for the same time-frequency slot, SL PRS is allocated to a different time position within the slot structure, creating a multi-dimensional resource allocation scheme that separates positioning signals from data/control signals.
2Reliability
If SL PRS is transmitted separately from sidelink signals, then resource conflict is avoided, but resource utilization efficiency decreases
Solution Approach 1:
The patent merges SL PRS transmission with the existing sidelink slot structure by allocating PRS resources within the same slot framework. The time-frequency resources are coordinated so that SL PRS shares the slot timeline with sidelink signals while maintaining separate resource blocks, achieving combined transmission without full resource competition.
Solution Approach 2:
The patent introduces dynamic resource allocation where the time offset and resource block assignment for SL PRS can be adjusted based on traffic conditions, channel state, and positioning requirements. This dynamic configuration optimizes resource utilization by adapting PRS placement to current system conditions while maintaining conflict avoidance.
Data Source
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AI summary
The present disclosure discloses an SL PRS transmitting method, a receiving method, apparatuses, a medium and a product, and belongs to the field of positioning signal measurement. The method includes: transmitting/receiving first information on a first sidelink channel resource, and transmitting/receiving a first SL PRS on a first SL PRS resource, where the first information is used to indicate an SL PRS transmission mode on the first SL PRS resource. The method allows the measurement based on a sidelink positioning reference signal between terminals in sidelink communication to be implemented.