Base Station Reference Signals for Remote Interference Mitigation
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing remote interference between base stations, which can lead to poor performance and inefficient spectrum resource utilization due to cross-link interference between downlink and uplink transmissions.
Innovation Solution
Implementing a reference signal (RIM RS) for remote interference mitigation, allowing base stations to measure and adjust their transmissions based on interference measurements, including adjusting timing, transmit power, and beamforming to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base stations transmit downlink signals to improve coverage and capacity, then communication service quality improves, but remote interference to uplink transmissions increases
Solution Approach 1:
The system performs preliminary interference measurement by having the victim base station measure the reference signal transmitted by the aggressor base station before actual interference occurs. This allows the network to assess the interference level in advance and take corrective actions such as adjusting transmit power or timing to prevent harmful interference while maintaining service quality.
Solution Approach 2:
The system implements feedback mechanisms where the victim base station measures the reference signal and reports interference levels to the network. Based on this feedback, the network can dynamically adjust transmission parameters including transmit power, timing, and beamforming to reduce remote interference while preserving downlink communication reliability.
2Area of moving object
If base stations increase transmit power to enhance signal coverage, then communication range expands, but interference to remote uplink transmissions worsens
Solution Approach 1:
The system measures reference signals in advance to determine the actual interference impact before increasing transmit power. This allows the network to optimize power levels to achieve required coverage while preventing excessive interference to remote uplink transmissions, rather than simply maximizing power without measurement.
Solution Approach 2:
The system dynamically adjusts transmission parameters including transmit power, timing offsets, and beamforming directions based on reference signal measurements. By changing these parameters adaptively, the network can expand signal coverage when needed while minimizing interference to other cells through coordinated parameter optimization.
3Ease of operation
If base stations transmit without coordinated timing to simplify operation, then system complexity reduces, but remote interference management becomes ineffective
Solution Approach 1:
The system performs preliminary timing measurements by having victim base stations measure the reference signal timing from aggressor base stations. This allows the network to establish coordinated timing relationships in advance, enabling effective interference mitigation through timing control while maintaining operational simplicity through automated measurement and configuration.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for remote interference mitigation between base stations using reference signals. Certain aspects provide a method for wireless communication by a first base station (BS). The method includes receiving a reference signal (RS) from a second BS. The method further includes performing interference measurement corresponding to interference from the second BS based on the RS being associated with the second BS.