Interference Cancellation via CSI-IM Sequence Signals
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Solution Overview
Problem
In wireless communication systems, especially in multi-node environments, interference cancellation remains a challenge due to the complexity of coordinating signals across dispersed nodes, leading to reduced signal quality and increased interference, which affects data throughput and network efficiency.
Innovation Solution
A method and apparatus for performing interference cancellation by receiving an interference configuration set and an interference sequence signal, which is mapped to channel state information-interference measurement (CSI-IM) resources, allowing for effective cancellation of interference signals through orthogonal cover codes and dynamic seed value adjustments based on frequency, time, and antenna ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-node coordinated communication is implemented to increase data throughput, then network capacity and SINR are improved, but interference coordination complexity increases
Solution Approach 1:
The terminal autonomously performs interference cancellation by detecting interference sequence signals and configuring cancellation parameters without requiring complex network-side coordination. The terminal self-services the interference mitigation function, reducing the coordination burden on the network while maintaining high throughput benefits
Solution Approach 2:
The interference cancellation function is extracted from the network coordination domain and implemented at the terminal side. By taking out the interference mitigation task from the complex multi-node coordination sphere and placing it at the receiving terminal, the system achieves high throughput with reduced coordination complexity
2Object-affected harmful factors
If interference cancellation is performed at the terminal side, then interference signal suppression is improved, but terminal processing complexity increases
Solution Approach 1:
The network pre-configures interference configuration sets and transmits interference sequence signals before the terminal performs cancellation. By preparing interference information in advance and transmitting it through dedicated resources, the terminal's processing complexity is reduced while maintaining effective interference suppression
Solution Approach 2:
Interference configuration sets and sequence signals act as intermediaries between the network and terminal. These pre-configured parameters serve as a bridge, providing the terminal with necessary interference information without requiring complex real-time processing or direct network-terminal coordination during data transmission
3Measurement precision
If interference configuration sets are transmitted through dedicated resources, then interference measurement accuracy is improved, but resource overhead increases
Solution Approach 1:
Dedicated interference measurement resources serve multiple functions: they carry both reference signals for channel estimation and interference sequence signals for interference characterization. By making these resources multi-functional, the system achieves accurate interference measurement without proportionally increasing resource overhead
Data Source
AI summary
A method and apparatus for performing interference cancellation is disclosed. The method includes receiving information about an interference configuration set related to characteristic of an interference signal, receiving an interference sequence signal indicating one interference configuration of the interference configuration set, and performing cancellation of the interference signal using the indicated interference configuration, wherein the interference sequence signal is received in at least a portion of a channel state information-interference measurement (CSI-IM) resource, and the interference sequence signal is received from an interference base station (BS) when the interference signal is scheduled to transmit and corresponds to the interference sequence signal.