Aggregated PRS Reception for Multi-Cell Positioning Accuracy
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently receiving and measuring reference signals, particularly in multi-node systems where node coordination and varying antenna configurations complicate signal processing and positioning accuracy.
Innovation Solution
A method for receiving a reference signal in a wireless communication system involves aggregating positioning reference signals from multiple cells, using unique identifiers and geographic location information to initialize the signal sequence, and determining appropriate cyclic prefix and antenna port configurations for accurate signal time difference measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple nodes are used for coordinated communication, then data throughput is improved, but signal processing complexity increases
Solution Approach 1:
The patent combines reference signals from multiple nodes (eNBs) into a single aggregated reference signal that is transmitted simultaneously across multiple component carriers. This merging approach allows the UE to receive and measure the reference signal more efficiently without having to process multiple separate signals, thereby improving data throughput while managing signal processing complexity through coordinated multi-point transmission.
2Measurement precision
If reference signals are transmitted from multiple cells, then positioning accuracy is improved, but measurement complexity increases
Solution Approach 1:
The patent aggregates reference signals from multiple cells (eNBs) into a single aggregated reference signal structure. This allows the UE to perform positioning measurements by processing one unified signal rather than multiple separate signals, improving positioning accuracy through multi-cell information while reducing measurement complexity through signal aggregation and coordinated transmission.
Solution Approach 2:
The patent applies preliminary actions by pre-configuring the aggregated reference signal structure, including setting the sequence initialization based on cell identifiers and determining the timing alignment between multiple cells. This preliminary setup simplifies the UE's measurement process by providing pre-processed signal structures that reduce the complexity of real-time positioning measurements.
3Object-affected harmful factors
If nodes are spaced apart by predetermined distance, then interference is reduced, but transmission area is reduced
Solution Approach 1:
The patent utilizes frequency diversity by transmitting the aggregated reference signal across multiple component carriers (frequency bands). This allows nodes spaced apart by predetermined distances to maintain reduced interference through spatial separation while compensating for the reduced transmission area by expanding coverage in the frequency domain. The multi-carrier transmission effectively increases the overall transmission area without increasing spatial interference.
Data Source
AI summary
According to one embodiment of the present invention, a method by which a terminal receives a reference signal for determining a position in a wireless communication system comprises the steps of: receiving information, which relates to a neighboring cell, including information relating to a plurality of cells to which an aggregation positioning reference signal (PRS) is transmitted; receiving the aggregation PRS by using the information relating to a plurality of cells; and measuring a reference signal time difference (RSTD) for the plurality of cells by using the received aggregation PRS, wherein a sequence of the aggregation PRS can be initialized by unique identifiers allocated to the plurality of cells.