SL Reference Signal Mapping for Shared Resource Pool Compatibility
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Solution Overview
Problem
The existing NR system lacks efficient methods for maximizing resource utilization in sidelink (SL) transmission, particularly in shared resource pools, while ensuring compatibility with previous releases and supporting SL positioning reference signals (SL-PRS) without impacting R16/R17 UE performance.
Innovation Solution
A method for determining the pattern and starting symbol of SL reference signals based on first information, including the total number of symbols used for SL transmission, resource pool type, and time division multiplexing enablement, to optimize resource allocation and ensure compatibility with previous releases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If SL reference signal is transmitted in shared resource pool, then resource utilization is improved, but compatibility with R16/R17 UEs deteriorates
Solution Approach 1:
The patent applies dynamics by making the mapping pattern selection adaptive based on the resource pool type. The UE dynamically determines whether to use first mapping pattern (for shared resource pool with TDM enabled) or second mapping pattern (for dedicated resource pool or shared resource pool with TDM disabled), allowing the system to adapt to different deployment scenarios and maintain compatibility while improving resource utilization.
Solution Approach 2:
The patent changes the mapping pattern parameter based on configuration information. By modifying the mapping pattern selection based on resource pool type and TDM enablement status, the system optimizes resource utilization for SL positioning while maintaining compatibility with existing UEs through configurable parameter adjustments.
2Productivity
If time division multiplexing is enabled for SL reference signal, then resource allocation efficiency is improved, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple mapping patterns before actual signal transmission. The network side pre-determines and configures the appropriate mapping pattern based on resource pool type and TDM enablement status, so that the UE can directly use the configured pattern without complex real-time calculations, reducing UE complexity while maintaining efficient resource allocation.
Solution Approach 2:
The system dynamically selects between pre-configured mapping patterns based on the resource pool type and TDM enablement status. This dynamic selection mechanism allows efficient resource allocation through TDM when needed, while avoiding the complexity of calculating optimal patterns in real-time by using pre-configured options.
3Productivity
If multiple time domain candidate positions are supported, then resource utilization is improved, but UE processing complexity increases
Solution Approach 1:
The patent applies preliminary action by having the network side pre-determine and configure the mapping pattern before transmission. The UE receives configuration information that specifies which mapping pattern to use, eliminating the need for the UE to independently calculate or process multiple candidate positions, thus reducing UE processing complexity while maintaining improved resource utilization.
Solution Approach 2:
The patent uses configuration information as an intermediary between the network side and UE. The network side determines the optimal mapping pattern and transmits this configuration information to the UE, which then uses this pre-provided guidance to correctly map the SL reference signal, avoiding the complexity of independent pattern determination while achieving efficient resource utilization.
Data Source
AI summary
A mapping resource determining method includes determining at least one of a pattern or a starting symbol of an SL reference signal based on first information. The first information includes at least one of the following; a total number of symbols used for SL transmission in a slot, resource indication information of the SL reference signal, resource pool type information, or time division multiplexing enable information, the time division multiplexing enable information represents that a slot includes at least two time domain candidate positions or at least two candidate time domain mapping patterns, and the resource pool type information represents a dedicated resource pool or a shared resource pool used for the SL reference signal transmission.