Dual-Frequency Wireless Device Positioning Method
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Solution Overview
Problem
Current methods for positioning User Equipment (UE) in wireless communication systems, particularly in higher frequency bands like FR2, face challenges in achieving accurate positioning while minimizing latency and resource overhead.
Innovation Solution
A dual-frequency positioning procedure is implemented, where an initial approximate position is obtained in a first frequency allocation, and then refined using a second positioning procedure in a second frequency allocation, utilizing a set of resources determined based on the initial results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If positioning is performed using higher frequency bands (FR2), then positioning accuracy is improved, but pathloss increases and requires narrow-beam transmission which complicates the positioning procedure
Solution Approach 1:
The positioning procedure is segmented into two distinct parts: a first positioning procedure in a first frequency allocation (lower frequency) to obtain approximate position, and a second positioning procedure in a second frequency allocation (higher frequency) to obtain refined position. This segmentation allows each procedure to leverage the strengths of its frequency band while avoiding the weaknesses, thereby improving overall positioning accuracy without overwhelming complexity in a single procedure
Solution Approach 2:
The first positioning procedure in the lower frequency allocation is performed as a preliminary action to obtain an approximate position of the wireless device. This preliminary positioning information is then used to configure and optimize the resources for the second positioning procedure in the higher frequency allocation, enabling more efficient and accurate positioning without requiring exhaustive resource allocation from the start
2Measurement precision
If a first positioning procedure is performed in a first frequency allocation to obtain approximate position, then the basis for resource determination in second frequency allocation is established, but additional positioning time is required
Solution Approach 1:
The first positioning procedure in the lower frequency allocation serves as a preliminary action that quickly establishes an approximate position of the wireless device. This preliminary information is then used to configure resources for the second positioning procedure, enabling the system to avoid exhaustive resource allocation and measurement processes in the higher frequency band, thereby reducing the total positioning time while maintaining high accuracy
Solution Approach 2:
Different frequency allocations are used for different stages of the positioning process: lower frequency (first frequency allocation) for the initial approximate positioning stage where coverage and robustness are prioritized, and higher frequency (second frequency allocation) for the refined positioning stage where precision is prioritized. This local quality assignment optimizes the trade-off between time and accuracy at each stage
3Measurement precision
If separate positioning procedures are conducted in different frequency allocations, then positioning accuracy is enhanced, but signaling overhead for resource configuration increases
Solution Approach 1:
The network node uses the result of the first positioning procedure (approximate position) as a preliminary basis to determine and configure the resources for the second positioning procedure. By deriving the second frequency allocation resources from the first positioning results, the system avoids transmitting completely independent resource configuration information, thereby reducing signaling overhead while still enabling enhanced positioning accuracy through the two-stage approach
Solution Approach 2:
The first positioning procedure serves multiple functions: it provides the approximate position for accuracy enhancement and simultaneously provides the basis for determining resources in the second frequency allocation. This multi-functionality reduces the need for separate signaling for resource configuration, thereby reducing overall signaling overhead while maintaining the benefits of separate positioning procedures
Data Source
AI summary
A method, performed by a network node, is disclosed for handling positioning of a User Equipment, wireless device. The network node obtains a first approximate position of the wireless device, based on a first positioning procedure for the wireless device in a first frequency allocation. The network node determines, based on the first approximate position of the wireless device, a set of resources to be used for a second positioning procedure in a second frequency allocation. The network node initiates the second positioning procedure in the second frequency allocation using the determined set of resources. The network node obtains an updated position of the wireless device based on the second positioning procedure.