Multi-Cell Cooperative Signal Processing for Interference Removal
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Solution Overview
Problem
In wireless communication systems, especially in multi-cell environments, inter-cell interference (ICI) caused by the reuse of pilot resources leads to performance deterioration, making it challenging to achieve high transfer rates and quality, particularly for user equipment (UE) located at cell edges.
Innovation Solution
A method and apparatus that share UE information between base stations (BSs) to generate cooperative detection UE set information, update processing sets, and perform filtering to remove interference signals, using maximum ratio combining (MRC) filters, thereby optimizing pilot resource allocation and channel estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pilot resources are reused across multiple cells to increase system capacity, then frequency efficiency and transfer rates improve, but inter-cell interference increases causing performance deterioration
Solution Approach 1:
The patent converts inter-cell interference from a harmful factor into a useful signal by implementing joint detection across multiple base stations. The interference signal received at one base station is treated as a desired signal by another base station, and through cooperative processing, the system extracts useful information from what would otherwise be interference, thereby improving transfer rates while maintaining frequency efficiency
Solution Approach 2:
The patent merges detection capabilities across multiple base stations into a unified joint detection process. By combining received signals and channel state information from multiple base stations, the system achieves improved signal detection performance and reduces the impact of inter-cell interference through cooperative processing
2Reliability
If multiple base stations share UE information and perform joint detection to reduce interference, then signal quality improves, but system complexity increases
Solution Approach 1:
The patent segments the joint detection process into manageable components: each base station independently calculates its own channel state information and identifies interfering UEs, then shares only essential information with neighboring base stations. This segmentation reduces the overall computational complexity while maintaining the benefits of joint detection
Solution Approach 2:
The patent introduces a coordinated communication mechanism as an intermediary between base stations, where base stations exchange necessary information (such as UE identifiers and channel state parameters) through a standardized interface. This intermediary layer simplifies the coordination process and reduces the complexity of direct multi-base-station interaction
Data Source
AI summary
The present invention relates to a method for transmitting and receiving signals in a wireless communication system. Specifically, in a multi-cell cooperative communication system, a base station can form cooperative detection user set information by detecting a terminal within a cell and form cooperative processing user set by receiving the cooperative detection user set information of a neighboring base station. At this time, the base station acquires information about a base station adjacent to the neighboring base station and designs an efficient filter in transmitting and receiving signals of terminals between the base stations, thereby being capable of removing inter-cell interference signals.