Interference Alignment Terminal Selection for Network Efficiency
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Solution Overview
Problem
Conventional radio communication networks face reduced transmission efficiency due to interference signals from neighboring base stations, which affect data rates and channel quality between base stations and terminals.
Innovation Solution
A network apparatus that receives signal quality information from terminals, groups them based on this information, and applies an interference alignment scheme to select target terminals that receive interference signals from adjacent base stations, optimizing data rates by controlling interference signal phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If terminals receive transmission signals from base stations, then communication coverage is provided, but interference signals from neighboring base stations reduce transmission efficiency and data rates
Solution Approach 1:
The patent applies interference alignment scheme to convert harmful interference signals into beneficial aligned signals. By selecting specific target terminals and aligning interference signals through phase control, the system transforms interference from a detrimental factor into a manageable component that can be effectively canceled or controlled at the receiver side, thereby improving data rate transmission efficiency
Solution Approach 2:
The patent changes the phase parameter of interference signals to achieve alignment. By controlling the phase of signals transmitted from interfering base stations, the system aligns interference signals at target terminals, enabling effective interference cancellation and improving transmission efficiency without requiring additional frequency resources
2Object-affected harmful factors
If interference alignment scheme is applied to all terminals, then interference control is maximized, but system complexity and computational overhead increase
Solution Approach 1:
The patent applies interference alignment scheme selectively to specific target terminals rather than uniformly to all terminals. By identifying and applying the scheme only to terminals that meet specific criteria (such as terminals experiencing significant interference), the system achieves effective interference control while minimizing the computational complexity and overhead associated with terminal selection and signal processing
3Measurement precision
If signal quality information is collected from all terminals, then accurate channel state information is obtained, but signaling overhead and network load increase
Solution Approach 1:
The patent extracts and processes signal quality information only from specific target terminals that are selected for interference alignment application, rather than collecting information from all terminals in the network. This selective extraction approach maintains accurate channel state information for the relevant terminals while significantly reducing the signaling overhead and network load associated with universal information collection
Data Source
AI summary
Provided is a signal transmission system including a terminal to receive a signal using an interference alignment scheme, and a transmitting base station to transmit, to the terminal, a signal where interference is aligned. The transmitting base station may select, from a plurality of terminals, a target terminal to receive the signal using the interference alignment scheme. The selected target terminal may receive the signal from the transmitting base station and receive interference signals from a plurality of interference base stations.