Interference Cancellation in Wireless Communication Systems
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Solution Overview
Problem
In wireless communication systems, existing technologies face challenges in effectively removing interference and accurately measuring channel state information, particularly in scenarios with multiple antennas and interfering cells, which affects data transmission rates and reliability.
Innovation Solution
A method and apparatus for a user equipment (UE) to cancel interference by using interference measurement resources (IMRs) to measure channel state information, involving detection and regeneration of interference signals or reference signals based on configuration information, and performing interference power measurements accordingly, depending on the presence and type of signals in resource blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If interference measurement is performed in resource blocks with data transmission from interfering cells, then interference cancellation accuracy is improved, but measurement complexity increases
Solution Approach 1:
The patent applies preliminary action by performing interference measurement and regenerating interference signals in advance before actual data reception. The UE measures interference in resource blocks where interfering cells transmit data, regenerates the interference signal using measured channel state information, and subtracts it from the received signal. This pre-processing approach improves interference cancellation accuracy without adding complexity during the actual data reception phase.
2Reliability
If channel state information is measured using interference measurement resources, then data transmission reliability is improved, but signal processing time increases
Solution Approach 1:
The patent implements continuity of useful action by continuously measuring channel state information using interference measurement resources (IMRs) and continuously canceling interference in real-time data reception. The UE maintains ongoing interference measurement and signal regeneration processes, ensuring that channel state information is always up-to-date for reliable data transmission while minimizing processing delays through efficient interference subtraction methods.
3Measurement precision
If interference signals are regenerated and subtracted from received signals, then signal reception quality is improved, but computational load increases
Solution Approach 1:
The patent applies the extraction principle by separating the interference signal from the received signal through regeneration and subtraction. The UE extracts the interference component by regenerating it using measured channel state information and known reference signals, then subtracts this extracted interference from the total received signal. This targeted extraction approach improves signal reception quality by removing only the harmful interference portion without requiring complete signal reconstruction, thereby reducing computational load compared to full signal processing methods.
Data Source
AI summary
The present invention relates to a wireless communication system. A method for a terminal for removing interference and receiving a signal in a wireless communication system according to one embodiment of the present invention comprises the steps of: receiving configuration information for channel status information which has utilized interference measurements; and on the basis of the configuration information, measuring the interference from an interfering cell, and on the basis of the measured interference, measuring the channel status information from an interference measurement resource (IMR), wherein interference can be measured, in a resource block in which an IMR exists, on the basis of whether the interfering cell is transmitting data and the type of the signal transmitted from the IMR.