Methods and apparatus for handling timers and backhaul logical channels during LTM cell switch in a wireless communication system

The proposed methods and systems address inefficiencies in 3GPP LTM cell switch by managing RLF timers and backhaul logical channels, improving communication efficiency and reducing latency through default value application for MCG and SCG, especially in inter-CU scenarios.

WO2026151145A1PCT designated stage Publication Date: 2026-07-16SAMSUNG ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
SAMSUNG ELECTRONICS CO LTD
Filing Date
2025-12-30
Publication Date
2026-07-16

AI Technical Summary

Technical Problem

Existing 3GPP LTM cell switch methods do not effectively handle timers and backhaul logical channels, particularly in scenarios involving inter-CU mobility and changes to the Secondary Cell Group (SCG), leading to inefficiencies and potential data loss.

Method used

Implementing methods and systems for handling timers and backhaul logical channels by applying default values for Radio Link Failure (RLF) timers and counters during LTM cell switch, specifically for Master Cell Group (MCG) and Secondary Cell Group (SCG), including scenarios like Inter-Central Unit (Inter-CU) and Intra-Central Unit (Intra-CU) mobility, and managing Backhaul (BH) logical channels.

Benefits of technology

Enhances communication efficiency by reducing latency and data loss during LTM cell switch, ensuring timely synchronization and proper configuration of RLF timers and counters, even in complex mobility scenarios.

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Abstract

The present disclosure relates to a 5G communication system or a 6G communication system for supporting higher data rates beyond a 4G communication system such as long term evolution (LTE). Embodiments herein disclose methods and systems for handling timers and backhaul logical channels when performing an LTM cell switch in 3GPP. Embodiments herein disclose methods and systems for handling of timers and counters related to radio link failure (such as, but not limited to, T310 / T311 and N310 / N311), upon LTM cell switch. Embodiments herein disclose methods and systems for handling of backhaul (BH) logical channels upon LTM cell switch.
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