Full-Duplex Base Station Interference Mitigation via Precoder Matrix
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Solution Overview
Problem
Current full-duplex wireless communication systems face challenges in managing inter-cell interference and self-interference, which hinder the potential increase in spectral efficiency due to the simultaneous transmission and reception of signals, and existing solutions either revert to half-duplex configurations or fail to effectively mitigate inter-cell interference.
Innovation Solution
An apparatus and method that determine an aggregate interference channel and modify it to create a modified channel, using a precoder matrix to mitigate interference at neighboring base stations, allowing the base station to serve user equipment while minimizing inter-cell interference, by iteratively adjusting the aggregate interference channel to meet performance criteria and using a precoder matrix that depends on the modified channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex communication is implemented with simultaneous uplink and downlink transmissions, then spectral efficiency is improved, but inter-cell interference and self-interference increase
Solution Approach 1:
The patent changes the parameter of transmission configuration by introducing a configured grant type 2 mechanism that allows dynamic adjustment of uplink transmission parameters without full scheduling overhead. This enables flexible parameter adaptation to balance spectral efficiency gains against interference levels, resolving the contradiction by allowing the system to operate in full-duplex mode while controlling interference through parameter optimization
Solution Approach 2:
The patent implements dynamic resource allocation where the network can configure and reconfigure grant parameters adaptively based on channel conditions and interference levels. The configured grant type 2 allows real-time adjustments to uplink transmissions, enabling the system to dynamically balance the spectral efficiency benefits of full-duplex operation against the harmful interference effects
2Productivity
If full-duplex communication is implemented with simultaneous uplink and downlink transmissions, then spectral efficiency is improved, but self-interference increases
Solution Approach 1:
The patent applies parameter changes by introducing configured grant type 2 mechanisms that enable dynamic adjustment of uplink transmission parameters. This allows the system to optimize transmission parameters to maximize spectral efficiency while simultaneously controlling self-interference through parameter adaptation, resolving the contradiction between productivity improvement and harmful factor generation
3Object-generated harmful factors
If conventional interference mitigation solutions are applied, then interference is reduced, but full-duplex configuration is reverted to half-duplex
Solution Approach 1:
The patent segments the interference mitigation approach by separating the configuration of uplink grants from dynamic scheduling decisions. The configured grant type 2 provides a semi-static framework that preserves full-duplex operation, while allowing selective application of interference mitigation techniques only where needed, thus avoiding complete reversion to half-duplex mode
Solution Approach 2:
The patent applies partial interference mitigation by using configured grant type 2 to provide interference control only for specific uplink transmissions rather than applying blanket half-duplex restrictions. This partial action allows the system to maintain full-duplex operation for most transmissions while applying interference mitigation selectively, preventing complete reversion to half-duplex configuration
Data Source
AI summary
The invention relates to an apparatus (301) for managing full-duplex communication between a base station (BS0) and a set of user equipments (101a,b), the base station (BS0) comprising a plurality of transmitter antennas, the plurality of transmitter antennas being associated with a downlink communication channel H between the base station (BS0) and the set of user equipments (101a,b) and a plurality of interference channels Gi between the base station (BS0) and a plurality of neighboring base stations (BSi).