Split gNB Interference Coordination With Centralized RIM Messaging
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Solution Overview
Problem
Existing methods for interference coordination in 5G networks incur significant signaling load on the backhaul due to remote interference scenarios, particularly in TDD systems with atmospheric ducting, which are not scalable.
Innovation Solution
A centralized network node acts as a central unit to manage remote interference management (RIM) coordination messages for a group of network nodes, reducing direct communications and signaling load by exchanging RIM-related messages between central units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing methods for interference coordination are used in remote interference scenarios, then interference management between base stations is achieved, but signaling load on the backhaul increases significantly
Solution Approach 1:
The patent introduces a master network node as an intermediary that centralizes the coordination of remote interference management messages. Instead of direct peer-to-peer communication between all aggressor and victim network nodes, the master node receives, processes, and forwards RIM coordination messages, thereby reducing the signaling load on the backhaul while maintaining effective interference management.
2Reliability
If direct communication between all aggressor and victim network nodes is maintained, then comprehensive interference coordination is achieved, but the system becomes non-scalable
Solution Approach 1:
The patent segments the distributed network nodes into groups, each managed by a master network node. This segmentation allows the system to scale by adding more master nodes and their associated network nodes without requiring all nodes to communicate directly with each other, thus maintaining comprehensive interference coordination while improving scalability.
Data Source
AI summary
Disclosed herein is a method for interference coordination in a split gNB architecture. The method includes receiving at a central unit gNB one or more messages from one or more distributed units. Each message that is received comprises an identification of the distributed unit that sent the message and an identification of a victim distributed unit that experienced interference. The method further includes merging the one or more messages into single merged message. The method additionally includes sending the merged message to at least the victim distributed unit.