CU-DU RIM Signaling for Remote Interference in 5G gNBs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing 5G communication systems face challenges in managing remote interference between central and distributed units of a base station, particularly in the context of split CU-DU architectures, where information exchange is inadequate for effective implementation of Remote Interference Management (RIM) mechanisms.
Innovation Solution
A method and device for a base station that facilitates information exchange between the central unit (CU) and distributed unit (DU) to manage remote interference, including reception status, interference measurement, and mitigation schemes, using transceivers and controllers to ensure optimal implementation of RIM mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If information exchange between central unit and distributed unit is enhanced for effective RIM implementation, then interference management effectiveness is improved, but device complexity and communication overhead increase
Solution Approach 1:
The base station is segmented into a central unit (CU) and a distributed unit (DU), allowing separation of control functions. The CU handles higher-layer protocols and coordination, while the DU handles lower-layer processing and signal transmission. This segmentation enables effective RIM information exchange without requiring complete centralization, thus improving interference management while controlling complexity.
Solution Approach 2:
A reference signal serves as an intermediary carrier for RIM information exchange between the CU and DU. The reference signal conveys interference status and mitigation information without requiring direct complex communication protocols, simplifying the information exchange mechanism while maintaining effectiveness.
2Reliability
If detailed interference measurement and mitigation information is exchanged between CU and DU, then uplink data reception reliability is improved, but communication overhead and processing time increase
Solution Approach 1:
The system performs preliminary interference measurement using reference signals before actual uplink data reception. By pre-measuring and identifying potential interference conditions, the system can prepare mitigation strategies in advance, reducing the processing time required during actual data reception while maintaining high reliability.
Solution Approach 2:
The system implements feedback mechanisms where the DU reports interference measurements to the CU, which then provides mitigation instructions. This continuous feedback loop enables real-time adaptation to interference conditions, improving uplink reception reliability while optimizing processing time through iterative refinement rather than exhaustive analysis.
Data Source
AI summary
The present disclosure provides a method and a device for performing remote interference management. The method comprises receiving, from a victim gNB, at least one RIM-reference signal (RS); transmitting, from a distributed unit (DU) of the aggressor gNB to a central unit (CU) of the aggressor gNB, a message comprising RIM information; and determining to stop monitoring the at least one RIM-RS based on the RIM information.