UE Interference Cancellation via Higher-Layer Assistance Parameters
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Solution Overview
Problem
In wireless communication systems, particularly in LTE, interference from neighbor cells poses a challenge for User Equipment (UE) in maintaining effective data reception, as existing methods are inadequate in efficiently canceling out such interference, leading to reduced service quality and increased complexity in signal processing.
Innovation Solution
A method and apparatus for a UE to receive interference cancellation assistance information, detect interference signals from neighbor cells, and cancel these signals from the serving cell's data channels, utilizing parameter combinations configured through higher-layer signaling, including modulation order, reference signal information, and symbol index details, to improve interference cancellation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE uses existing interference cancellation methods, then interference from neighbor cells can be partially mitigated, but the interference cancellation efficiency is insufficient and service quality deteriorates
Solution Approach 1:
The network side performs preliminary actions by determining interference cancellation assistance information (including modulation order, resource allocation, reference signal configuration) before the UE receives data. This pre-configured information is transmitted to the UE through higher layer signaling, enabling the UE to proactively detect and cancel interference from neighbor cells before it degrades service quality, thereby resolving the contradiction between interference mitigation and service quality maintenance
2Manufacturing precision
If the UE implements comprehensive interference cancellation, then data reception quality improves, but signal processing complexity increases
Solution Approach 1:
The invention changes the parameters of interference cancellation by using network-determined assistance information (modulation order, resource allocation patterns, reference signal configurations) instead of generic UE-based detection. These predefined parameters enable the UE to efficiently detect and cancel specific interference signals with reduced computational complexity, achieving high data reception quality without excessive processing demands
Solution Approach 2:
The network side acts as an intermediary by determining and providing interference cancellation assistance information to the UE. This intermediary role enables the UE to perform precise interference cancellation without having to independently analyze all possible interference scenarios, thereby improving data reception quality while keeping signal processing complexity manageable through network-guided parameterization
Data Source
AI summary
In this application, a method for a terminal cancelling interference from a neighboring cell is disclosed. More specifically, the method comprises the steps of: receiving one or more interference cancellation assistance information indicating one of a plurality of parameter combinations for detecting an interference signal from the neighboring cell; detecting an interference signal from the neighboring cell, based on the one or more interference cancellation assistance information and cancelling the interference signal in signals received from a serving cell, wherein the interference signal is a downlink data channel of the neighboring cell or a downlink control channel of the neighboring cell, and the plurality of parameter combinations is configured through a higher layer.