Inter-RU Interference Measurement for Space Division Duplex
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently measuring and managing inter-RU interference for space division duplex communication in LTE-based V2X systems, which is crucial for ensuring reliable and high-speed communication in vehicle-to-everything applications.
Innovation Solution
A method and apparatus that involve a UE with multiple radio units (RUs) receiving threshold values from an eNB to measure inter-RU interference, determining the necessity of periodic measurements based on interference strength, and transmitting interference information efficiently to enable space division duplex communication, while considering analog interference cancellation and channel estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inter-RU interference measurement is performed frequently to ensure communication reliability, then communication reliability is improved, but signaling overhead and resource consumption increase
Solution Approach 1:
The system changes the measurement parameter from continuous interference level monitoring to binary state reporting (above/below threshold). The UE compares measured interference against a threshold and reports only when the state changes, transforming a continuous measurement problem into a discrete parameter reporting scheme that reduces signaling overhead while maintaining reliability.
Solution Approach 2:
Instead of requiring periodic interference measurements and reports regardless of conditions, the system applies partial action by only triggering measurements and reports when interference exceeds the threshold. This selective measurement approach reduces unnecessary signaling while ensuring reliability is maintained when needed.
2Object-affected harmful factors
If analog interference cancellation is applied to reduce inter-RU interference, then interference strength is reduced, but processing complexity increases
Solution Approach 1:
The system applies preliminary action by performing analog interference cancellation in the RF domain before digital baseband processing. The cancellation operation is executed on the received signal using pre-computed cancellation coefficients, removing interference components before they enter the complex digital signal processing chain, thus reducing overall processing complexity.
Solution Approach 2:
The system substitutes mechanical/digital processing with analog RF domain processing for interference cancellation. By implementing cancellation in the analog RF domain through signal mixing and combining operations rather than digital signal processing, the system reduces the computational burden on digital processors while achieving interference reduction.
Data Source
AI summary
Provided are a method and an apparatus for measuring inter-RU interference in order to perform space division duplex communication in a wireless communication system. Specifically, a terminal acquires first interference information indicating the strength of inter-RU interference after analog interference cancellation, and second interference information indicating the strength of inter-RU interference before analog interference cancellation. The terminal determines whether space division duplex communication can be performed between RUs, by comparing the interference strength indicated by the first interference information with a first threshold. The terminal determines whether inter-RU interference needs to be periodically measured, by comparing the interference strength indicated by the second interference information with a second threshold.