Radio Node Interference Mitigation Without Reception Gaps
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Solution Overview
Problem
In wireless communication networks, maintaining good signal quality is challenging due to interference from interfering cells, which complicates the reception of target signals and increases the need for gaps in channel reception, limiting the ability to receive signals from both victim and aggressor cells simultaneously.
Innovation Solution
A radio node receives target and interfering channels of different types, determining information based on the receipt of these channels without using gaps that impact the interfering channel, allowing for reduced interference mitigation without the need for extensive gap usage, thereby enabling simultaneous reception of channels from both cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gaps are used to receive interfering channels, then interference mitigation capability is improved, but reception continuity and resource efficiency deteriorate
Solution Approach 1:
The system performs preliminary actions by storing channel state information and interference characteristics in advance during periods when interference is manageable. This pre-collected data enables the enhanced receiver to quickly mitigate interference without requiring time-consuming gap measurements, thus maintaining reception continuity while improving interference mitigation capability.
Solution Approach 2:
The patent uses copied or reconstructed versions of interfering channel signals based on previously stored channel state information. Instead of requiring direct real-time reception of interfering channels during gaps, the system creates accurate copies using stored data and signal processing techniques, enabling effective interference cancellation without interrupting normal reception.
2Manufacturing precision
If gaps are used to read system information, then system information reading requirement is met, but signal reception from victim and aggressor cells simultaneously is limited
Solution Approach 1:
The patent merges the functions of system information reading and interference measurement into a unified process. By using enhanced receiver techniques that can process multiple channel types simultaneously, the system reads system information from both victim and aggressor cells during the same time period without requiring separate gap periods, thus meeting SI reading requirements while maintaining simultaneous reception capability.
Solution Approach 2:
The system dynamically adjusts its reception strategy based on channel conditions and interference levels. When interference is high, it prioritizes interference mitigation using stored information; when conditions permit, it performs system information reading. This dynamic approach eliminates the need for fixed gap patterns, enabling flexible simultaneous reception while meeting all reading requirements.
3Reliability
If enhanced receiver techniques are implemented, then interference handling is improved, but complexity and resource requirements increase
Solution Approach 1:
The enhanced receiver implements partial interference cancellation by focusing computational resources on canceling only the most significant interfering signals rather than attempting to cancel all interference sources. This selective approach maintains effective interference handling while significantly reducing memory and processing requirements compared to comprehensive cancellation methods.
Solution Approach 2:
The system changes operational parameters by storing channel state information at reduced resolution or in compressed formats that retain sufficient accuracy for interference mitigation. This parameter optimization allows the enhanced receiver to function effectively with reduced memory requirements and lower processing complexity while maintaining interference handling capability.
Data Source
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AI summary
According to some embodiments, a radio node receives target channels from a target cell and interfering channels from first and second interfering cells. The first target channel and the first interfering channel each comprise a first channel type, and the second target channel and the second interfering channel each comprise a second channel type. The radio node receives the first interfering channel when receiving the first target channel and determines first information accordingly. The radio node uses one or more gaps impacting receipt of the second interfering channel relative to receipt of the second target channel and determines second information based on receipt of the second target channel and second interfering channel. The radio node reduces interference associated with the at least one of the interfering cell based on at least one of the first information and the second information.