The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Yue Tian - One of the best experts on this subject based on the ideXlab platform.
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all optical virtual Private Network in passive optical Networks
Laser & Photonics Reviews, 2008Co-Authors: Yue Tian, Elaine Wong, Nishaanthan Nadarajah, Calvin Chun-kit ChanAbstract:We review recent progress on all-optical virtual-Private-Network (VPN) schemes in passive optical Networks (PONs). PON is a promising candidate in future access areas to provide broadband services with low cost. With all-optical virtual Private Network (VPN) function, PON can support efficient interNetworking among end users with dedicated optical channels, thus enabling guaranteed bandwidth and enhanced security at the physical layer. Here, we discuss and compare existing schemes of all-optical VPNs in time-division-multiplexed (TDM) PONs, and also recently proposed schemes for deployment in wavelength-division-multiplexed (WDM) PONs and two-stage TDM/WDM PONs.
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demonstration and scalability analysis of all optical virtual Private Network in multiple passive optical Networks using ask fsk format
IEEE Photonics Technology Letters, 2007Co-Authors: Yue TianAbstract:We present a scalable all-optical virtual Private Network (VPN) in a two-stage passive optical Network (PON) architecture to connect optical Network units (ONUs) in different sub-PONs. It provides efficient access and VPN service covering a wider area. The scheme employs amplitude-shift keying/frequency-shift keying (FSK) orthogonal modulation formats, which are used for the VPN and upstream traffic at 625 Mb/s and 5 Gb/s, respectively. At the optical line terminal side, a fiber Bragg grating reflects one of the two frequency components in the FSK signal back to the ONUs in a same VPN. Using a bidirectional amplifier, the power budget and the scalability of the Network are significantly improved, as evidenced by numerical analysis using the parameters in the experiment.
Sakti, Ilham Anggoro - One of the best experts on this subject based on the ideXlab platform.
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Model Komunikasi Sensor Curah Hujan Menggunakan Virtual Private Network Berbasis Cloud VPS
Program Studi Teknik Informatika FTI-UKSW, 2019Co-Authors: Sakti, Ilham AnggoroAbstract:Sementara tidak diijinkan karya tersebut diunggah ke dalam aplikasi Repositori Perpustakaan Universitas karena di scan lembar pengesahan tidak dicantumkan tanggal lulus.Pengelolaan dan pengawasan sensor curah hujan bukan hal yang mudah, karna penempatan sensor yang strategis untuk pengambilan data curah hujan menyulitkan admin untuk secara manual mengelola dan mengawasi data yang terkumpul. Pembangunan model komunikasi berbasis cloud vps dalam penelitian ini diharapkan mampu mengatasi masalah pengelolaan dan pengawasan pada admin sensor curah hujan. Sistem cloud vps dipilih karena sistem ini dapat sementara menampung data sensor curah hujan yang disinkronkan dengan sitem cloud vps serta server admin dapat dengan mudah mengakses sensor curah hujan melalui Private Network yang di bangun antara cloud virtual Private server dengan server admin dan sensor curah hujan. Pada penelitian ini peneliti menggunakan Scaleway (cloud virtual Private server) server yang berada di belanda, OpenVPN untuk pembangunan jaringan Private Network, dan Rsync tools linux untuk melakukan sinkron data pada sensor curah hujan dengan data di server cloud.Management and supervision of rainfall sensors is not an easy thing, because the placement of a strategic sensor for rainfall data collection makes it difficult for admins to manually manage and monitor the collected data. The development of the VPS cloud-based communication model in this study is expected to be able to overcome the problem of management and supervision in the rainfall sensor admin. The cloud vps system is chosen because this system can temporarily accommodate rainfall sensor data synchronized with the cloud vps system and the admin server can easily access rainfall sensors through the built-in Private Network between cloud virtual Private server and admin servers and rainfall sensors. In this study researchers used Scaleway (cloud virtual Private server) located on the Dutch server, OpenVPN for the construction of a Private Network Network, and Linux Rsync tools to synchronize data on rainfall sensors with data on the cloud server
Nirwan Ansari - One of the best experts on this subject based on the ideXlab platform.
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Toward IP virtual Private Network quality of service: a service provider perspective
IEEE Communications Magazine, 2003Co-Authors: Jingdi Zeng, Nirwan AnsariAbstract:To complement classical enterprise wide area Network infrastructures, IP (based) virtual Private Networks have been gaining ground, with the capability of offering cost-effective, secure, and Private-Network-like services. In order to provision the equivalent quality of service of legacy connection-oriented layer 2 virtual Private Networks (VPNs), IP VPNs have to overcome the intrinsically best effort characteristics of the Internet in this multimedia era. This article discusses the IP VPN quality of service (QoS) issue from a service provider point of view, where QoS guarantees are carried out at the Network level as well as at the node level. It presents the whole picture by highlighting and stitching together various QoS enabling technologies from previous research and engineering work.
Calvin Chun-kit Chan - One of the best experts on this subject based on the ideXlab platform.
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all optical virtual Private Network in passive optical Networks
Laser & Photonics Reviews, 2008Co-Authors: Yue Tian, Elaine Wong, Nishaanthan Nadarajah, Calvin Chun-kit ChanAbstract:We review recent progress on all-optical virtual-Private-Network (VPN) schemes in passive optical Networks (PONs). PON is a promising candidate in future access areas to provide broadband services with low cost. With all-optical virtual Private Network (VPN) function, PON can support efficient interNetworking among end users with dedicated optical channels, thus enabling guaranteed bandwidth and enhanced security at the physical layer. Here, we discuss and compare existing schemes of all-optical VPNs in time-division-multiplexed (TDM) PONs, and also recently proposed schemes for deployment in wavelength-division-multiplexed (WDM) PONs and two-stage TDM/WDM PONs.
Adhitama, Arif Putra - One of the best experts on this subject based on the ideXlab platform.
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ANALISIS KEAMANAN DAN PERFORMANSI VOIP (VOICE OVER INTERNET PROTOCOL) MENGGUNAKAN VPN (VIRTUAL Private Network) PADA MEDIA WIRED DAN WIRELESS
Jurnal Mahasiswa TEUB, 2018Co-Authors: Adhitama, Arif Putra, Priyono, Wahyu Adi, Mustofa AliAbstract:Abstrak - Voice Over Internet Protocol (VoIP) dikenal juga dengan sebutan IP Telephony didefinisikan sebagai suatu sistem yang menggunakan jaringan internet untuk mengirimkan data paket suara dari suatu tempat ke tempat yang lain menggunakan perantara protokol IP. Namun, penggunaan VoIP memiliki kelemahan yaitu data komunikasi tidak terjamin keamanannya. Untuk mendapatkan jaminan keamanan sambungan VoIP, maka digunakan Virtual Private Network (VPN) yang dapat menambahkan enkripsi pada data percakapan. Penelitian ini dilakukan untuk mengetahui tingkat keamanan dari layanan VoIP sebelum dan sesudah diamankan menggunakan VPN. Penelitian ini dilakukan untuk mengetahui perubahan performansi dan tingkat keamanan dari layanan VoIP sebelum dan sesudah diamankan menggunakan VPN pada media wired dan wireless. Parameter yang digunakan untuk menganalisa performansi VoIP meliputi delay end to end, packet loss, dan throughput. Dari hasil perhitungan simulasi, kualitas performansi VoIP jaringan tanpa VPN dan VPN pada media wired dan wireless telah sesuai dengan standar TIPHON. Untuk delay end to end masuk dalam indeks delay < 150 ms atau “Sangat Bagus”, kemudian untuk packet loss masuk dalam indeks 0-3 % atau “Bagus”, dan throughput masuk dalam indeks 100-75 % atau “Sangat Bagus”. Kata kunci : VoIP, VPN, delay end to end, packet loss, dan throughput. Abstract Abstract - Voice Over Internet Protocol (VoIP) also known as IP Telephony is defined as a system that uses Internet Network to transmit voice packet data from one place to another using IP protocol intermediaries. However, the use of VoIP has the disadvantage of data communication is not guaranteed security. To get the security guarantee of VoIP connection, it is used Virtual Private Network (VPN) which can add encryption to data of conversation. This study was conducted to determine the security level of VoIP service before and after secured using VPN. This research was conducted to find out the change of performance and security level of VoIP service before and after secured using VPN on wired and wireless media. Parameters used to analyze VoIP performance include end to end delay, packet loss, and throughput. From the results of simulation calculations, the quality of VoIP Network performance without VPN and VPN on wired and wireless media has been in accordance with TIPHON standards. For end to end delays in the delay index <150 ms or "Very Good", then for packet loss in the index 0-3% or "Good", and throughput enter in the index of 100-75% or "Very Good". Keywords: VoIP, VPN, end to end delay, packet loss, and throughput
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Analisis Keamanan Dan Performansi VoIP (Voice Over Internet Protocol) Menggunakan VPN (Virtual Private Network) Pada Media Wired Dan Wireless
2018Co-Authors: Adhitama, Arif PutraAbstract:Voice Over Internet Protocol (VoIP) dikenal juga dengan sebutan IP Telephony didefinisikan sebagai suatu sistem yang menggunakan jaringan internet untuk mengirimkan data paket suara dari suatu tempat ke tempat yang lain menggunakan perantara protokol IP. Namun, penggunaan VoIP memiliki kelemahan yaitu data komunikasi tidak terjamin keamanannya. Untuk mendapatkan jaminan keamanan sambungan VoIP, maka digunakan Virtual Private Network (VPN) yang dapat menambahkan enkripsi pada data percakapan. Penelitian ini dilakukan untuk mengetahui tingkat keamanan dari layanan VoIP sebelum dan sesudah diamankan menggunakan VPN. Penelitian ini dilakukan untuk mengetahui perubahan performansi dan tingkat keamanan dari layanan VoIP sebelum dan sesudah diamankan menggunakan VPN pada media wired dan wireless. Parameter yang digunakan untuk menganalisa performansi VoIP meliputi delay end to end, packet loss, dan throughput. Dari hasil perhitungan simulasi, kualitas performansi VoIP jaringan tanpa VPN dan VPN pada media wired dan wireless telah sesuai dengan standar TIPHON. Untuk delay end to end masuk dalam indeks delay < 150 ms atau “Sangat Bagus”, kemudian untuk packet loss masuk dalam indeks 0-3 % atau “Bagus”, dan throughput masuk dalam indeks 100-75 % atau “Sangat Bagus”