5G NR Positioning Bandwidth Aggregation Across Contiguous Carriers
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently utilizing bandwidth for enhanced positioning accuracy, particularly in unlicensed and licensed spectrum scenarios, leading to suboptimal performance in 5G and beyond networks.
Innovation Solution
Implementing bandwidth aggregation techniques for sounding reference signals (SRS) and downlink positioning reference signals (DL PRS) across intra-band contiguous carriers, combined with MAC-CE activation and deactivation of semi-persistent SRS, to enhance phase continuity and power consistency in simultaneous transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If bandwidth aggregation is implemented for positioning signals across multiple carriers, then positioning accuracy is improved, but system complexity increases
Solution Approach 1:
The patent combines multiple carriers into a single aggregated bandwidth for positioning signal transmission. By merging multiple component carriers (e.g., 5 carriers in FR2) into one unified bandwidth resource, the system achieves improved positioning accuracy through enhanced signal strength and resolution while managing complexity through a unified control mechanism rather than independent management of each carrier.
Solution Approach 2:
The patent segments the aggregated bandwidth into multiple component carriers while maintaining unified control through a single indicator. This segmentation allows the system to utilize multiple frequency resources for positioning while using a single control signal to manage the aggregation, thereby improving accuracy without proportionally increasing control complexity.
2Reliability
If multiple carriers are aggregated for positioning, then signal strength and resolution are improved, but the number of control signals required increases
Solution Approach 1:
The patent creates a universal control mechanism where a single indicator can refer to multiple component carriers. This multi-functional indicator serves as a unified control signal that manages the aggregation of multiple carriers for positioning, thereby improving signal strength and reliability without requiring separate control signals for each carrier.
Solution Approach 2:
The patent introduces an intermediary indicator that acts as a mediator between the multiple component carriers and the control system. This single indicator serves as a representative for all aggregated carriers, enabling the system to control and manage multiple carriers through one intermediary signal rather than requiring direct control of each carrier individually.
3Measurement precision
If bandwidth aggregation is used for positioning, then positioning performance is improved, but phase continuity and power consistency become more difficult to maintain
Solution Approach 1:
The patent applies parameter changes by adjusting the time domain resource allocation and symbol configuration across aggregated carriers. By modifying these parameters to ensure consistent timing and phase relationships, the system maintains phase continuity and power consistency across multiple carriers while still benefiting from the aggregated bandwidth for improved positioning performance.
Data Source
AI summary
A computer-readable storage medium stores instructions for execution by one or more processors of a UE and to configure the UE for positioning enhancements in a 5GNR and beyond network, and cause the UE to encode RRC signaling for transmission to a base station. The RRC signaling includes UE capability information, indicating the UE supports one or both of DL PRS bandwidth aggregation and UL SRS for positioning bandwidth aggregation. Higher layer configuration via RRC signaling is received from the base station and configures a linkage between DL PRS resource sets across two or more DL PFLs that are mapped to two or more contiguous intra-band DL component carriers for DL PRS bandwidth aggregation operation. The UE performs measurements using the DL PRS resource sets across the configured intra-band DL component carriers in accordance with the linkage.