Reference Signal Remote Interference Management via Sequence Mapping
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Solution Overview
Problem
Existing wireless communication systems face challenges in effectively managing remote interference, particularly due to atmospheric ducting, which can lead to deteriorating Interference-over-Thermal (IoT) values and impact network coverage and connection success rates.
Innovation Solution
The system employs a reference signal for remote interference management (RIM-RS) that conveys identification information, indicates whether it is transmitted by a victim or aggressor device, and includes mitigation information to estimate propagation delay and assess the level of mitigation needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reference signals are used to convey remote interference management information, then interference mitigation capability is improved, but signal complexity and overhead increase
Solution Approach 1:
The reference signal is designed to serve multiple functions simultaneously: it acts as a standard channel state information reference signal for channel estimation while also embedding remote interference management information through specific sequence selection and resource element mapping. This multi-functionality allows the same signal structure to provide both conventional wireless communication functions and specialized interference mitigation capabilities without requiring separate dedicated signals.
Solution Approach 2:
The patent utilizes changes in reference signal parameters (sequence index, resource element positions, mapping patterns) to encode different types of interference management information. By varying these parameters, the system can indicate different interference scenarios, mitigation strategies, and device roles (victim vs. aggressor) without changing the fundamental signal structure, thus managing complexity through parameter variation rather than structural complexity.
2Reliability
If mitigation information is included in reference signals, then remote interference management effectiveness is improved, but information overhead increases
Solution Approach 1:
The reference signal structure is designed to carry both conventional channel state information and specialized remote interference management information within the same signal framework. The information is embedded through sequence selection and resource element mapping rather than adding separate information channels, allowing the signal to serve dual purposes without proportional increases in overhead.
Solution Approach 2:
The patent uses existing reference signal structures and formats that are already part of the wireless communication standard, copying and adapting them for interference management purposes. By leveraging established signal structures rather than creating entirely new signaling mechanisms, the system minimizes overhead while achieving the required information transmission for interference mitigation.
Data Source
AI summary
The present disclosure is directed to systems and methods for conveying remote interference management information via a reference signal. For example, an interference management method may include receiving, at a first device, an interference signal from a second device. At the first device, a reference signal is generated, including mitigation information for remote interference management. The first device may transmit the reference signal to the second device. The method may further include receiving, at the first device, a mitigation response signal indicative of a level of mitigation undertaken by the second device based on the mitigation information that the first device transmitted.