Communication control method, IAB node, cellular communication system, chipset and program

The communication control method addresses the challenge of seamless network connectivity for mobile IAB nodes by initiating F1 connection requests at the right time, ensuring uninterrupted service during migrations.

JP2026143684APending Publication Date: 2026-09-08KYOCERA CORP
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Patent Information

Application Number
JP2026097071
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2022-08-08
Filing Date
2026-06-10
Publication Date
2026-09-08

AI Technical Summary

Technical Problem

In cellular communication systems with mobile IAB nodes, there is a challenge in ensuring seamless network connectivity during migration or handover processes, particularly due to the uncertainty in timing for establishing an F1 connection with a target donor node, leading to potential service interruptions.

Method used

A communication control method where a source donor node sends a request to a mobile IAB node to establish a new F1 connection with a target donor node, and the IAB node sends an F1 setup request at the appropriate time, facilitating smooth migration and reducing service disruptions.

Benefits of technology

Enables proper network connection for user equipment by ensuring timely establishment of F1 connections during mobile IAB node migrations, thereby minimizing service interruptions.

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Abstract

The present invention provides a communication control method, an IAB node, a cellular communication system, a chipset, and a program for broadcasting a system information block that does not contain information supporting other relay nodes when a relay node is operating as a mobile relay node in a cellular communication system. [Solution] The communication control method includes the step of a mobile relay node moving from a source donor node to a target donor node receiving a predetermined message from the source donor node and sending an F1 setup request message to the target donor node requesting the establishment of an F1 connection. The predetermined message is a message representing either a request to establish a new F1 connection to the target donor node or an instruction to move to the target donor node.
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