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Electrical Engineering Department, University of Indonesia
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Feasibility Analysis Of Gsm-R System For Railways In Indonesia: Case Study Of Jakarta Bandung High Speed Train Riyantika, Regina; Gunawan, Dadang
Journal Research of Social Science, Economics, and Management Vol. 3 No. 5 (2023): Journal Research of Social Science, Economics, and Management
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jrssem.v3i5.613

Abstract

High-speed railway technology development necessitates the development of a communication system that supports various components of train operation facilities, such as train control, safety communication, and others. The construction of fhigh-speed railway in Indonesia in the Jakarta-Bandung area uses the Chinese Train Control System (CTCS) Level 3 signaling system, which makes the Global System for Mobile Communication-Railway (GSM-R) a wireless signaling network system. Because there are already existing GSM-based public telecommunications services, known as public GSM, on the same frequency used by a number of cellular operators in Indonesia, the use of GSM-R poses implementation challenges. This will result in reduced service quality and revenue for protected cellular network operators due to the use of these frequency bands to support the operation of high-speed railway services in Indonesia. In this study, an evaluation was carried out to look for other potentials from using the GSM 900 MHz frequency band, which can be used as an option to be implemented on high-speed trains in Indonesia. The research begins with calculating the estimated potential loss of revenue from using telecommunications network operators. This data will be analyzed in terms of the economic feasibility of several other frequency band choices for implementing the GSM 900 MHz frequency band on high-speed trains in Indonesia, so that it is hoped that this will become a new consideration that can become a solution and recommendation in the application and use of GSM-R technology in Indonesia.
The Power Reduction Policy and Its Impact on Cellular Network Performance under GSM-R Interference: A Case Study of KCJB-Indosat Degita, Luthia Defit; Gunawan, Dadang
Journal Research of Social Science, Economics, and Management Vol. 4 No. 12 (2025): Journal Research of Social Science, Economics, and Management
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jrssem.v4i12.904

Abstract

This research aims to evaluate the impact of transmitter power reduction policies implemented to mitigate spectrum interference between the GSM-R system and cellular networks on the Jakarta–Bandung High-Speed Railway (KCJB), with a specific focus on Indosat. Employing a quantitative descriptive method complemented by strategic management analysis (SWOT, IFE–EFE, QSPM), this study analyzes technical parameters (RSRP, traffic volume, active users) and business indicators (daily revenue, customer churn rate). Findings indicate significant service quality degradation, marked by a 35.7% decrease in RSRP coverage, 34% reduction in daily traffic volume, and 33% decrease in active users. Additionally, business performance suffered, reflected by 5.8% drop in daily revenue and a substantial rise in customer churn. Strategic analysis suggests joint spectrum management and installation of band-pass filters on the GSM-R side as the optimal mitigation strategy. This study underscores the necessity of coordinated technical and regulatory solutions to balance interference mitigation with telecommunication service sustainability.
Co-Authors ABNER, JEFRI Agus Wiyono Ajib Setyo Arifin Ajiesastra, Raden Andhika Arfianto Fahmi Bambang Setiadi Chalvari, Kancerio Degita, Luthia Defit Feliza, Destri Anggita Filbert H. Juwono Firmansyah, Abdul Rizki Hoedojo Hoedojo, Hoedojo KURNIAWAN, FAROHAJI Muhamad Asvial Musfirah Naning Sutriningsih Nihayati, Nihayati Nurrohman, Indra Nurul Chasanah Pasha, M Kemal Pedrason, Rodon REGINA RIYANTIKA Robia Astuti Sardy S, Sardy Suhartanti Agoes, Suhartanti Sumarlan, Sutrimo Yudhi Triprasetyo, Yudhi