PRS Frequency Overlap Scheduling for Phase Compensation
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Solution Overview
Problem
The challenge in 5G wireless communication systems is to enhance spectral efficiency and reduce latency while supporting a large number of simultaneous connections, particularly in positioning reference signal (PRS) transmission, where existing methods do not effectively utilize frequency overlap for phase estimation.
Innovation Solution
A method involving the scheduling and transmission of PRS resources across multiple time intervals with staggered frequency overlaps, enabling phase estimation based on these overlaps, and providing an indication of the frequency overlap to facilitate accurate phase estimation at the receiver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If PRS resources are scheduled non-overlapping in frequency across time intervals, then frequency resource utilization is improved, but phase estimation accuracy deteriorates
Solution Approach 1:
The patent merges PRS resources across frequency boundaries by allowing partial overlaps between consecutive PRS resources in adjacent time intervals. This combining approach enables the receiver to utilize overlapping frequency regions for phase estimation, improving phase accuracy while the non-overlapping portions maintain efficient frequency resource utilization.
Solution Approach 2:
The patent applies local quality by differentiating the treatment of frequency resources: non-overlapping portions are used for maximizing resource utilization, while locally introduced overlapping portions are specifically designed for phase estimation purposes. This localized overlap strategy resolves the contradiction by assigning different functions to different frequency regions.
2Measurement precision
If PRS resources are scheduled with frequency overlap for phase estimation, then phase estimation accuracy is improved, but frequency resource utilization deteriorates
Solution Approach 1:
The patent applies partial action by introducing only the minimum necessary frequency overlap between consecutive PRS resources to achieve adequate phase estimation accuracy. The overlap is not complete but partial, allowing the system to gain phase estimation benefits while minimizing the impact on frequency resource utilization. The majority of frequency resources remain efficiently utilized through non-overlapping scheduling.
3Productivity
If PRS resources are staggered in frequency across time intervals, then spectral efficiency is improved, but phase continuity deteriorates
Solution Approach 1:
The patent introduces frequency overlap regions as intermediary zones between staggered PRS resources in adjacent time intervals. These intermediary overlapping regions serve as bridges that maintain phase continuity across the frequency-staggered resources, allowing the receiver to perform accurate phase estimation while the overall system maintains high spectral efficiency through staggered scheduling.
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a receiver device receives a first plurality of positioning reference signal (PRS) resources scheduled within a PRS bandwidth on a plurality of time intervals, the first plurality of PRS resources staggered in frequency across the plurality of time intervals, each pair of consecutive PRS resources of the first plurality of PRS resources partially overlapping in frequency, and performs phase estimation for the first plurality of PRS resources based, at least in part, on the overlap in frequency between each pair of consecutive PRS resources.