Sidelink Positioning Reference Signal Resource Allocation
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Solution Overview
Problem
The existing wireless communication systems face inefficiencies in resource utilization due to mismatched bandwidths between Physical Sidelink Control Channels (PSCCH) and Sidelink Positioning Reference Signals (SL PRS), leading to wasted resources and poor positioning accuracy in applications like V2X and Industrial Internet of Things.
Innovation Solution
A method is introduced to optimize resource allocation by establishing a relation between the location of signaling and the configuration of reference signals within the resource pool, ensuring effective multiplexing and efficient use of time-domain and frequency-domain resources for SL PRS transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PSCCH scheduling SL PRS resources is not frequency-division multiplexed with SL PRS, then SL PRS can be transmitted with full bandwidth, but it results in waste of a large amount of resources in the slot occupied by PSCCH
Solution Approach 1:
The patent merges PSCCH and SL PRS into the same frequency resources through frequency-division multiplexing. The PSCCH occupies certain subcarriers while SL PRS occupies other subcarriers within the same resource blocks, allowing both control signaling and positioning reference signals to share the same frequency spectrum efficiently.
Solution Approach 2:
The patent transitions from time-domain separation to frequency-domain multiplexing. Instead of allocating separate time slots for PSCCH and SL PRS, the invention utilizes the frequency dimension to multiplex both signals simultaneously within the same time slot, thereby improving resource utilization while maintaining positioning accuracy.
2Loss of energy
If PSCCH and SL PRS are multiplexed in frequency domain, then resource utilization efficiency is improved, but it increases the complexity of resource configuration and signaling
Solution Approach 1:
The patent segments the frequency resources into distinct subcarrier groups for PSCCH and SL PRS. By dividing the available bandwidth into specific subcarrier allocations, the system can clearly define which subcarriers are assigned to control signaling and which are assigned to positioning reference signals, simplifying the multiplexing configuration.
Solution Approach 2:
The patent applies different resource allocation strategies to different parts of the frequency spectrum. Certain resource blocks are configured for PSCCH while adjacent or interleaved resource blocks are configured for SL PRS, allowing localized optimization of resource usage based on specific transmission requirements.
Data Source
AI summary
A first node receives a first information block, the first information block is used to determine a first resource pool; transmits a first signaling, the first signaling is used to determine a first time-domain resource block from the first resource pool; transmits a first positioning reference signal on a first reference signal resource; the first reference signal resource belongs to the first time-domain resource block in time domain; a configuration of the first reference signal resource is related to a locational relation between the first time-domain resource block and time-domain resources occupied by the first signaling in time domain, and the configuration of the first reference signal resource comprises at least one of a number of symbol(s) for the first reference signal resource and a time-domain location of the first reference signal resource. Application enhances the resource utilization efficiency of the sidelink positioning reference signal resource pool.