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All Journal Jurnal EECCIS Jurnal Jaringan Telekomunikasi
Ahmad Wilda Yulianto
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Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering

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Further simulation testing in CoopMAC-U for underwater acoustic sensor networks Muhammad Syirajuddin S.; Nurul Hidayati; Rieke Adriati Wijayanti; Ahmad Wilda Yulianto; Dianthy Marya
Jurnal Jaringan Telekomunikasi Vol 13 No 1 (2023): Vol. 13 No. 01 (2023) : March 2023
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jartel.v13i1.642

Abstract

In order for underwater wireless sensor networks to communicate more efficiently, MAC protocols are needed to control the use of acoustic channels. With the high propagation delay and the limited bandwidth available on the acoustic channel, a specially designed MAC protocol is needed for UWASN (Underwater Acoustic Sensor Networks). In this research, the adaptation of Cooperative MAC for underwater (CoopMAC-U) will be further studied to test the protocol performance. In the previous research, CoopMAC-U was simulated yet the fairness of the transmission was not simulated and tested. In this research, CoopMAC-U will be studied further and improved. The simulation result shows that the Improved CoopMAC-U protocol produces better-normalized throughput than the initial version of CoopMAC-U. The protocol is also proven that it is backward compatible between conventional mode and cooperative mode. For offered load greater than 0.2, both the initial version of CoopMAC-U and the Improved CoopMAC-U result in stagnant normalized throughputs but the improved ones double the value of the initial version.
VoLTE Implementation with Software Open5GS, SrsRAN, and Kamailio Using SDR with a Billing System Marantika, Andry Septian; Muhammad Syirajuddin Suja'I; Ahmad Wilda Yulianto
Jurnal EECCIS (Electrics, Electronics, Communications, Controls, Informatics, Systems) Vol. 20 No. 2 (2026)
Publisher : Faculty of Engineering, Universitas Brawijaya

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Abstract

In the initial implementation of LTE networks, voice calls still required a fallback to GSM or 2G (Circuit-Switched Fallback), resulting in service interruptions and the inability to maintain simultaneous data sessions. This study proposes an open-source-based implementation of Voice over LTE (VoLTE) by integrating Kamailio as the IP Multimedia Subsystem (IMS), Open5GS as the Evolved Packet Core (EPC), and srsRAN as the eNodeB. The system was designed and tested to provide native voice services over LTE without disrupting internet connectivity. The test results show that the proposed architecture successfully enables simultaneous voice calls and internet access without network fallback to GSM/3G. Signal quality measurements recorded a Reference Signal Received Power (RSRP) of -83 dBm for UE-1 and -82 dBm for UE-2, Reference Signal Received Quality (RSRQ) of -9 dB for both, and a Signal-to-Noise Ratio (SNR) of 13 dB. FTP throughput tests achieved download speeds of up to 404.88 KB/s and upload speeds of 105.98 KB/s during active calls. Latency averaged 32 ms, jitter was 4 ms, and packet loss was 0.96% for UE-1 and 0.97% for UE-2, all within the standard VoLTE quality thresholds. In addition, the system supports IMS-based SMS services and multi-eNodeB operations, including handover processes without call drops. These findings demonstrate that the developed LTE SDR-based VoLTE network can deliver high-quality, stable, and fully packet-based voice communication services, meeting or exceeding recommended technical performance
Co-Authors Dianthy Marya Marantika, Andry Septian Muhammad Syirajuddin S. Muhammad Syirajuddin Suja'I Nurul Hidayati Rieke Adriati Wijayanti