UE CRS Interference Cancellation in DSS Neighboring Cells
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in dynamic spectrum sharing (DSS) scenarios, cell-specific reference signals (CRS) from neighboring cells cause interference with data transmissions, leading to reduced reception quality and efficiency.
Innovation Solution
A method and apparatus for a UE to apply interference cancellation techniques to mitigate CRS interference from neighboring cells by determining interference and applying appropriate cancellation methods, such as rate-matching and network-assisted configurations, to enhance data reception quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CRS transmission is performed on neighboring cell using second RAT, then reference signal coverage is improved, but interference to data transmission on first cell increases
Solution Approach 1:
The patent converts the harmful CRS interference into a beneficial signal by detecting the CRS from the second RAT cell and using it to estimate the channel response. This estimated channel response is then utilized to improve data reception on the first cell, transforming the interference from a detrimental factor into a useful resource for channel estimation and interference cancellation.
Solution Approach 2:
The patent introduces an intermediary processing mechanism where the received signal containing CRS interference is processed through interference detection and channel estimation algorithms. This intermediary process separates and utilizes the CRS component to generate channel state information that aids in recovering the desired data signal, effectively mediating between the interfering CRS and the target data transmission.
2Reliability
If interference cancellation is applied to mitigate CRS interference, then data transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies partial interference cancellation by focusing specifically on canceling the CRS component from the second RAT rather than attempting to cancel all possible interferences. The UE detects CRS only from configured second RAT cells and performs channel estimation using only these CRS signals, achieving sufficient interference mitigation without the excessive complexity of comprehensive interference cancellation.
Solution Approach 2:
The patent enables self-service interference mitigation where the UE autonomously detects CRS from neighboring second RAT cells, estimates the channel response using these CRS signals, and applies interference cancellation without requiring complex network coordination. The device serves itself by utilizing available CRS signals to improve its own reception quality.
Data Source
AI summary
In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE receives, from a first base station, a data transmission on a first cell using a first RAT. The UE determines a CRS transmission using a second RAT on a second cell from a second base station. The UE determines that the CRS transmission on the second cell interferes with receiving the data transmission on the first cell at the UE. The UE applies an interference cancellation on the first cell to mitigate an interference from the CRS transmission on the second cell to the data transmission on the first cell.