sip server
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2021 ◽  
Vol 23 (06) ◽  
pp. 1373-1382
Author(s):  
Dr. Kiran V ◽  
◽  
Rahul Raj D N ◽  

Scalability is an important aspect of communication networks. With the ascent of SIP and associated modern real-time protocols, IP telephony has become a revolutionary technology in connecting users through real-time voice communications with enabled video and instant messaging capabilities. B2BUA is a SIP server that provides call management and authentication functionality by reformulating the request and routing the traffic to other user agents in the network. It comprises signaling and media entities that handle all control signaling messages and real-time data(media) information respectively. The signaling and entities run as different processes in the same container. Such an architecture encounters a large CPU utilization after a specific number of maximum calls due to increase traffic flowing within the same node. Further Packet processing is CPU intensive and there is a need for an architecture that scales well with increasing traffic without hitting the CPU performance. The paper presents the design of decoupled architecture for Signaling and Media entities by running both the processes in different containers. With such an approach, one Signaling entity can communicate with multiple Media entities or vice versa thereby providing a suitable scalable solution to deal with the increased traffic and further maintaining the system efficiency. The paper is concluded by highlighting the difference between Kubernetes and OpenStack for the proposed architecture


Author(s):  
Nwaogwugwgu Ibeabuchi Benjamin ◽  
Amachundi Samuel Adda ◽  
Nandom Sumayyah Sophie ◽  
Nze Chiedozie Victor
Keyword(s):  
Low Cost ◽  

Techno Com ◽  
2020 ◽  
Vol 19 (2) ◽  
pp. 135-146
Author(s):  
Suharsono Bantun ◽  
Ahmad Ashari ◽  
Rahmat Karim

Munculnya Single Board Computer seperti Raspberry Pi di pasaran yang lebih murah serta hemat daya dibandingkan PC dapat menghemat biaya pengadaan komputer dan biaya operasional. Dengan kemampuan komputasi yang dimilikinya, Raspberry Pi dapat difungsikan menjadi berbagai macam server termasuk server VVoIP, sehingga untuk membangun jaringan VVoIP tidak lagi diperlukan sebuah komputer. Dalam penelitian ini Raspberry Pi difungsikan sebagai SIP (Session Initiation Protocol) server dari aplikasi video phone menggunakan Asterisk. Penelitian ini bertujuan untuk mengetahui kinerja Raspberry Pi baik dalam panggilan per detik maupun panggilan bersamaan dengan resolusi CIF dan resolusi VGA. Penelitian ini juga menggunakan codec G711a dan VP8, serta untuk mengetahui kelayakan penggunaan server tersebut, dilakukan analisis QoS dari setiap panggilan dengan jumlah panggilan bersamaan tertentu. Untuk perbandingan, akan dilakukan pengujian terhadap PC yang digunakan sebagai SIP server. Berdasarkan hasil pengujian, dapat dilihat bahwa untuk jumlah panggilan per detik dan panggilan bersamaan, Raspberry Pi mampu melayani komunikasi VVoIP dengan baik dan layak diimplementasikan sebagai SIP server untuk aplikasi video phone. Namun, untuk penggunaan pada skala yang lebih besar, PC masih memiliki lebih banyak keunggulan dibanding Raspberry. Raspberry Pi yang difungsikan sebagai SIP server mampu melayani hingga 131 panggilan video dengan resolusi CIF dan 94 panggilan video dengan resolusi VGA.


Author(s):  
Usman Haruna Nakorji ◽  
E A Adedokun ◽  
I J Umoh ◽  
Abdullazeez Shettima

Abstract This paper presents a 2-tier scheme for mitigating coordinated call attacks on VoIP networks. Call interaction pattern was considered using talk and salient periods in a VoIP call conversation. At the first-tier, Short Term Energy algorithm was used for call interaction feature extraction and at the second-tier Hidden Markov Model was used for caller legitimacy recognition. Data of VoIP call conversations were collated and analyzed to extract distinctive features in VoIP call interaction pattern to ascertain the legitimacy of a caller against coordinated call attacker. The performance metrics that was used are; False Error Rate (FER), Specificity, Detection Accuracy and Throughput. Several experiments were conducted to see how effective the mitigating scheme is, as the scheme acts as a proxy server to Session Initiation Protocol (SIP) server. The experiments show that; when the VoIP server is under coordinated call attack without a mitigating scheme only 15.2% of legitimate VoIP users had access to the VoIP network and out of which about half of the legitimate users had their calls dropped before completion, while with the 2-tier mitigating scheme, when the VoIP server is under coordinated call attacks over 90.3% legitimate VoIP callers had their calls through to completion


2019 ◽  
Vol 108 (4) ◽  
pp. 2229-2239
Author(s):  
Santosh Kumar ◽  
Umesh Kumar Tiwari ◽  
Mandeep Kaur
Keyword(s):  

2018 ◽  
Vol 9 (3S) ◽  
pp. 637
Author(s):  
M.N. Ismail ◽  
M.A. Shukran ◽  
K. Maskat ◽  
M.R.M. Isa ◽  
S. Ishak ◽  
...  

2017 ◽  
Vol 3 (2) ◽  
pp. 201
Author(s):  
Purwo Panggalih Gentayu ◽  
Mudrik Alaydrus

Dalam aplikasi SIP-Based VoIP, dua end point / User Agent (UA)dapat berkomunikasi secara peer to peer / peering menggunakan SIP,begitu juga interkoneksi antar SIP server sehingga implementasi SIPBasedVoIP tidak hanya dapat diterapkan untuk jaringan akses, namunjuga interkoneksi antar operator melalui jaringan IP. Penelitian inimencoba memberikan analisa interkoneksi antar operator untukInternational Direct Dialing (IDD) yang diterapkan di internasionalswitching center PT. Indosat, Tbk. menggunakan protokol SIP yangmencakup mekanisme layanan keamanan (security service), performansipensinyalan SIP dan kualitas panggilan. Layanan keamanan mencegahterjadinya kemungkinan serangan DOS dari jaringan luar. Performansipensinyalan setelah adanya layanan keamanan menunjukan performayang sangat baik SEER 99.6% untuk incoming dan 98.94% untukoutgoing, SER sebesar 22.68 % untuk incoming dan 47.11% untukoutgoing. Kinerja kualitas panggilan dengan perspektif penilaianpengguna (end user), menggunakan parameter MOS didapatkan nilai 4.4dan R-Factor diantara 93-93.2 setiap jam.


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