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All Journal ComEngApp : Computer Engineering and Applications Journal
Rahmat Budiarto
College of Computer Science and Information Technology, Albaha University, Saudi Arabia
Computer Science & IT Engineering

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High Load Control Mechanism for SIP Servers Ahmadreza Montazerolghaem; Seyed-Amin Hosseini-Seno; Mohammad Hossein Yaghmaee; Rahmat Budiarto
Computer Engineering and Applications Journal Vol 5 No 2 (2016)
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (708.448 KB) | DOI: 10.18495/comengapp.v5i2.167

Abstract

To start voice, image, instant messaging, and generally multimedia communication, session communication must begin between two participants. SIP (session initiation protocol) that is an application layer control induces management and terminates this kind of sessions. As far as the independence of SIP from transport layer protocols is concerned, SIP messages can be transferred on a variety of transport layer protocols including TCP or UDP. Mechanism of Retransmission that is embedded in SIP could compensate for the missing packet loss, in case of need. This mechanism is applied when SIP messages are transmitted on an unreliable transmission layer protocol like UDP. Also, while facing SIP proxy with overload, it could cause excessive filling of proxy queue, postpone increase of other contacts, and add to the amount of the proxy overload. In the present work, while using UDP as transport layer protocol, invite retransmission timer (T1) was appropriately regulated and SIP functionality was improved. Therefore, by proposing an adaptive timer of invite message retransmission, attempts were made to improve the time of session initiation and consequently improve the performance. Performance of the proposed SIP was implemented and evaluated by SIPP software in a real network environment and its accuracy and performance were demonstrated.
Network-on-Chip Paradigm for System-on-Chip Communication Rahmat Budiarto; Lelyzar Siregar; Deris Stiawan
Computer Engineering and Applications Journal Vol 6 No 1 (2017)
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (36.543 KB) | DOI: 10.18495/comengapp.v6i1.186

Abstract

Developments of modern technologies in electronics, such as communication, Internet, pervasive and ubiquitous computing and ambient intelligence have figured largely our life. In our day micro-electronic products inspire the ways of learning, communication and entertainment. These products such as laptop computer, mobile phones, and personal handheld sets are becoming faster, lighter in weight, smaller in size, larger in capacity, lower in power consumptions, cheaper and functionally enhanced. This trend will persistently continue. Following this trend, we could integrate more and more complex applications and even systems onto a single chip. The System-on-Chip (SoC) technologies, where complex applications are integrated onto single ULSI chips became key driving force for the developments.
Co-Authors Ahmadreza Montazerolghaem Deris Stiawan Lelyzar Siregar Mohammad Hossein Yaghmaee Seyed-Amin Hosseini-Seno