Mobile Relay Node Handover via Donor Node Coordination
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Solution Overview
Problem
The integration of mobile relay nodes in cellular communication systems poses challenges in terms of complex network topology and handover procedures, particularly when mobile IAB nodes need to connect to both donor nodes and intermediate relay nodes.
Innovation Solution
A communication control method that involves transmitting information about mobile relay nodes by both stationary donor nodes and intermediate relay nodes, allowing mobile relay nodes to select suitable cells for connection and facilitating handover processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mobile relay nodes are integrated into cellular communication systems, then network coverage and flexibility are improved, but network topology complexity and handover procedure complexity increase
Solution Approach 1:
The patent introduces a donor node as an intermediary that manages mobile relay nodes. The donor node receives capability information from mobile relay nodes, determines appropriate cells for connection, and coordinates handover procedures. This intermediary structure simplifies the overall network topology by centralizing the management function rather than requiring complex peer-to-peer coordination between multiple mobile relay nodes.
2Adaptability or versatility
If mobile relay nodes connect to both donor nodes and intermediate relay nodes, then connection flexibility is improved, but handover procedure complexity increases
Solution Approach 1:
The patent implements preliminary action by having the donor node pre-determine the target cell before handover occurs. The donor node receives capability information from the mobile relay node, identifies suitable cells in advance, and prepares the handover procedure. This eliminates the need for complex real-time negotiation during handover, reducing procedural complexity while maintaining connection flexibility.
Solution Approach 2:
The patent employs feedback mechanisms where the mobile relay node transmits its capability information back to the donor node, and the donor node sends back determination results about the target cell. This feedback loop enables flexible connection decisions while simplifying the handover procedure by having all necessary information exchanged before the actual handover execution.
3Reliability
If information about mobile relay nodes is transmitted by stationary nodes, then connection stability is improved, but communication overhead increases
Solution Approach 1:
The patent applies local quality by having only the donor node (the most stable and authoritative node in the network) transmit capability information and determination results. Intermediate relay nodes do not repeat this information transmission, reducing redundant communication overhead. The information is transmitted locally at the appropriate decision point in the network hierarchy, maintaining connection stability while minimizing unnecessary communication traffic.
Data Source
AI summary
In an aspect, a communication control method is used in a cellular communication system. The communication control method includes transmitting, by one of a donor node or an intermediate relay node that is stationary without movement, information about a mobile relay node.