Sidelink Ranging PRS Multiplexing PSCCH
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Solution Overview
Problem
Current wireless communication systems lack efficient support for UE-to-UE range determination, which is essential for relative positioning applications, despite having a 3GPP positioning framework for UE-assisted and UE-based positioning methods.
Innovation Solution
The implementation of sidelink ranging procedures for positioning reference signal types, including resource pool configurations for different PRS types, multiplexing configurations for physical sidelink control channels with PRS, and dynamic indication of ranging parameters, enables high-precision range and relative orientation determination between user equipment (UEs).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If UE-to-UE range determination is implemented using existing 3GPP positioning framework, then positioning functionality is provided, but efficiency and precision are insufficient for relative positioning applications
Solution Approach 1:
The patent segments the positioning reference signal into multiple types (PRS Type 1, Type 2, Type 3) with different characteristics suited for different ranging scenarios. Each PRS type uses different sequence structures and transmission patterns, allowing the system to select the most appropriate type for specific relative positioning applications, thereby improving both precision and efficiency.
Solution Approach 2:
The patent implements dynamic indication of ranging parameters through sidelink control information (SCI), allowing the transmitting UE to dynamically adjust and indicate ranging parameters such as PRS type, resource allocation, and transmission timing. This dynamic adaptation enables efficient resource utilization and optimized positioning performance based on real-time channel conditions and application requirements.
2Measurement precision
If multiple PRS types are configured for different ranging scenarios, then positioning accuracy is improved, but system complexity increases
Solution Approach 1:
The patent designs a universal sidelink positioning framework that supports multiple PRS types through a common resource pool configuration and unified multiplexing mechanism. The same physical sidelink control channel (PSCCH) and physical sidelink shared channel (PSSCH) structures are used across all PRS types, with flexibility to accommodate different ranging scenarios. This multi-functional approach improves positioning accuracy while avoiding the need for separate dedicated signaling mechanisms for each PRS type.
Solution Approach 2:
The patent manages complexity by changing parameters within existing signal structures rather than creating entirely new signals for each PRS type. Different PRS types are distinguished through parameter variations such as sequence initialization values, resource element mappings, and transmission timing, all controlled through scalable parameter sets that can be configured through standard RRC signaling.
3Productivity
If PSCCH is multiplexed with PRS, then resource utilization is improved, but interference between control and positioning signals may increase
Solution Approach 1:
The patent multiplexes PSCCH and PRS in the frequency domain by allocating them to different resource blocks within the same time slot. The PSCCH occupies specific physical resource blocks (PRBs) while PRS is mapped to remaining resource elements, effectively utilizing the frequency dimension for multiplexing. This approach improves resource utilization while maintaining signal reliability through frequency separation.
Solution Approach 2:
The patent applies preliminary puncturing or rate-matching operations to the PRS sequence before transmission to account for PSCCH resource allocations. By pre-processing the PRS signal to avoid PSCCH resources, the system ensures that control signals are transmitted without interference while maximizing the utilization of available spectrum resources for positioning.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for sidelink ranging for positioning reference signal types. One apparatus (1100) includes a transceiver (1125) that receives a positioning reference signal (“PRS”) configuration for at least one PRS type for transmitting a PRS to at least one second network device, receives a resource pool configuration for transmitting the PRS associated with relative positioning measurements, and receives a multiplexing configuration for multiplexing a physical sidelink control channel (“PSCCH”) with the PRS. The apparatus (1100) includes a processor (1105) that multiplexes the PSCCH with the PRS according to the multiplexing configuration. The transceiver (1125) transmits the multiplexed PSCCH and PRS to the at least one second device according to the PRS configuration and the resource pool configuration.