Method, user equipment and access network node

By enabling user equipment to make informed decisions based on availability information for target cells, the communication system improves handover efficiency and reliability, particularly in dynamic NTN and NES environments.

WO2025070151A1 Publication Date: 2025-04-03NEC CORP
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Patent Information

Application Number
PCT/JP2024/033032
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-09-28
Filing Date
2024-09-17
Publication Date
2025-04-03

AI Technical Summary

Technical Problem

Existing communication systems face challenges in managing handovers, especially in scenarios involving Non-Terrestrial Networks (NTN) and Network Energy Saving (NES) cells, where cell availability is dynamic and unpredictable.

Method used

The proposed solution involves a method where user equipment (UE) receives availability information for target cells from the access network node, allowing it to determine whether to reselect a target cell or select a new cell based on this information.

Benefits of technology

This approach enhances handover performance by ensuring that the UE can efficiently select the most suitable cell, even in scenarios where target cells are not immediately available, thereby reducing data connectivity interruptions and improving overall network reliability.

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Abstract

A communication system is disclosed in which a user equipment (UE), base stations of a non-terrestrial network (NTN) radio access network (RAN), base stations of a terrestrial network (TN) radio access network (RAN), and / or communication entities of a core network are mutually configured to implement one or more enhancements for conventional handover (HO), Conditional Handover (CHO), and / or L1 / L2 triggered mobility (LTM), in the context of dynamically changing cell coverage, such as that which may occur in the context of Non-Terrestrial Networks (NTN) and Network Energy Saving (NES) cells.
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