Enhanced RACH-less conditional handover for LEO intra-satellite system

IF 4.6 3区计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS

ICT Express Pub Date : 2026-02-01 Epub Date: 2025-09-15 DOI:10.1016/j.icte.2025.08.004

Tae-Yoon Kim , Wonjae Lee , Jae-Hyun Kim

引用次数: 0

Abstract

In this letter, we propose a random access channel (RACH)-less conditional handover (RCHO) algorithm that utilizes antenna gain to predict uplink (UL) grant start timing, reducing signaling overhead and enhancing handover (HO) performance in the low Earth orbit (LEO) intra-satellite system. The proposed algorithm mitigates execution timing unpredictability, allowing a user equipment (UE) to HO to any pre-configured target cell while minimizing signaling overhead. We analyze the performance of the proposed RCHO and compare it with basic HO (BHO), conditional HO (CHO), and RCHO without UL grant start timing prediction. Simulation results demonstrate that RCHO achieves comparable or superior HO performance with the lowest latency while reducing overhead by more than 85% compared to conventional RCHO.

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改进的低轨道卫星内系统无rach条件切换

在这封信中，我们提出了一种无随机接入信道（RACH）的条件切换（RCHO）算法，该算法利用天线增益来预测上行链路（UL）授权开始时间，减少信令开销并增强低地球轨道（LEO）卫星内系统的切换（HO）性能。所提出的算法减轻了执行时间的不可预测性，允许用户设备（UE） HO到任何预配置的目标单元，同时最小化信令开销。我们分析了所提出的RCHO的性能，并将其与基本HO （BHO）、条件HO （CHO）和没有UL授权开始时间预测的RCHO进行了比较。仿真结果表明，与传统的RCHO相比，RCHO以最低的延迟实现了相当或更好的HO性能，同时将开销降低了85%以上。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ICT Express Multiple-

CiteScore

10.20

自引率

1.90%

发文量

167

审稿时长

35 weeks

期刊介绍： The ICT Express journal published by the Korean Institute of Communications and Information Sciences (KICS) is an international, peer-reviewed research publication covering all aspects of information and communication technology. The journal aims to publish research that helps advance the theoretical and practical understanding of ICT convergence, platform technologies, communication networks, and device technologies. The technology advancement in information and communication technology (ICT) sector enables portable devices to be always connected while supporting high data rate, resulting in the recent popularity of smartphones that have a considerable impact in economic and social development.