PRS and SRS Bandwidth Aggregation for Positioning Accuracy
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Solution Overview
Problem
Current wireless communication systems face challenges in achieving high positioning accuracy, particularly in multi-dimensional environments, due to limitations in bandwidth aggregation and signaling mechanisms for positioning reference signals (PRS) and sounding reference signals (SRS) in intra-band contiguous carriers.
Innovation Solution
The implementation of a triggering mechanism for positioning SRS with bandwidth aggregation, including enhanced DCI formats and RRC signaling, to facilitate simultaneous transmission across multiple carriers, and power calculation methods to manage transmit power effectively, ensuring accurate positioning in multi-dimensional scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If bandwidth aggregation is implemented for positioning reference signals across intra-band contiguous carriers, then positioning accuracy is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent combines multiple positioning reference signals (PRS) across intra-band contiguous carriers into a unified bandwidth aggregation framework. By merging resource allocation, triggering mechanisms, and power control for multiple carriers, the system achieves enhanced positioning accuracy while managing complexity through integrated signaling structures.
Solution Approach 2:
The triggering mechanism and resource allocation framework are designed to be universal across multiple carriers and signal types. A single DCI format can trigger PRS transmission on multiple aggregated carriers, and the same signaling structure supports both individual carrier and aggregated carrier operations, reducing the need for separate specialized mechanisms.
2Measurement precision
If bandwidth aggregation is implemented for positioning reference signals across intra-band contiguous carriers, then positioning accuracy is improved, but implementation complexity increases
Solution Approach 1:
The patent establishes preliminary configuration through RRC signaling before actual PRS transmission. Carrier aggregation configurations, resource allocations, and triggering mechanisms are pre-configured and stored, allowing the system to quickly activate bandwidth aggregation without complex real-time decision-making during signal transmission.
Solution Approach 2:
The system implements dynamic switching between bandwidth aggregation mode and non-aggregation mode based on positioning requirements. The triggering mechanism allows flexible activation and deactivation of aggregated carrier PRS transmission, enabling the system to adapt to varying positioning accuracy needs while simplifying implementation for scenarios where full aggregation is not required.
3Measurement precision
If transmit power is increased across multiple aggregated carriers, then positioning accuracy is improved, but total power consumption exceeds maximum limits
Solution Approach 1:
The patent implements power backoff mechanisms that dynamically adjust transmit power parameters across aggregated carriers. When total power would exceed maximum limits, the system reduces power on individual carriers proportionally or selectively, maintaining positioning functionality while adhering to power constraints. This involves changing power distribution parameters rather than simply reducing overall power.
Solution Approach 2:
The power control mechanism applies different power levels to different carriers based on their individual contributions to positioning accuracy. Rather than uniformly reducing power across all aggregated carriers, the system can maintain higher power on carriers that provide more significant positioning information while reducing power on less critical carriers, optimizing the balance between accuracy and power consumption.
Data Source
AI summary
Various embodiments herein provide techniques related to configuration that may be provided to a user equipment (UE). The configuration information may include: a resource configuration that indicates that the UE is to transmit a first reference signal (RS) on a first component carrier of a plurality of component carriers, wherein the first RS is an RS of a first RS set; and a resource configuration that indicates that the UE is to transmit a second RS on a second component carrier of the plurality of component carriers, wherein the second RS is an RS of a second RS set, wherein the first RS resource set and the second RS resource set are linked for bandwidth aggregation. Other embodiments may be described and/or claimed.