Systems and Communications Commons^™

Low Cost Broadband Ip Satellite Backbone In Indonesia, Onno W. Purbo

Online Journal of Space Communication

This article will report on several IP-based satellite backbones in operation in Indonesia. Basically, shared VSAT IP service, such as Digital Video Broadcasting (DVB) service seems to be the favorite low cost solution for broadband IP satellite backbone compared to the more costly Single Channel Per Carrier (SCPC).

Answers to questions, such as typical configurations providing the service, will be described. Some of these services may be run without any government license. The receive-only IP VSAT service is one of these.

A one-way receive-only IP-based DVB VSAT service may be obtained for US $33-270 per month. Two-way DVB/RCS VSAT service …

Kerjasama Strategis Sistem Vsat Dalam Teknologi Informasi Perusahaan: Kasus Infocom, Rafdian Rasyid

Online Journal of Space Communication

Apakah VSAT (Very Small Aperture Terminals) bisa menjadi sistem pendukung bagi teknologi informarsi (TI) perusahaan? Atau, dapatkah VSAT memainkan peran strategis yang penting dalam mendukung bisnis?

Sangat jelas bahwa di Indonesia VSAT merupakan infrastruktur yang mutlak keberadaanya. Tidak dapat disangkal bahwa sampai saat ini Indonesia belum memiliki prasarana terestrial yang dapat mencakup daerah-daerah terpencil, bahkan kadang-kadang juga daerah metropolitan. Hanya VSAT-lah yang dapat menjangkaunya. Namun, hubungan apa yang dapat kita tarik antara eksistensi VSAT-VSAT dan teknologi informasi dalam lingkungan suatu perusahaan? Artikel ini mencoba menjawab hal itu. Kemudian, penulis akan membahas tantangan-tantangan apa yang dihadapi oleh operator-operator VSAT, serta pemecahan …

Strategic Alignment Of Vsat System In Corporate It: Infokom's Case, Rafdian Rasyid

Online Journal of Space Communication

Can VSATs play a significant strategic role in terms of supporting businesses? Can VSATs support corporate IT?

It is obvious that in Indonesia, VSAT is a must have infrastructure for business. Nobody can argue that Indonesia up to now does not have terrestrial infrastructures that can cover remote areas or even metropolitan areas. Only VSATs can reach them. However, what link can we make between the existence of VSATs and IT in the corporate environment? This article attempts to answer that. We will also discuss challenges faced by VSAT operators, and solutions that can be applied.

Indonesia's Vsat Industry And Role Of Csm Today And In The Future, Gregorius Parlindungan Hutahaean

Online Journal of Space Communication

PT Citra Sari Makmur, or "CSM," began its VSAT operations in 1989 and became the first VSAT operator for the public in Indonesia. In the beginning, VSATs were targeted mainly to the corporate market in Indonesia: entities that operated nationwide and needed online data communication for financial transactions, online integrated data bases and report consolidation.

CSM was founded and led by an Indonesian businessman with vision, Mr. Subagio Wirjoatmodjo, who is currently also a member of MASTEL's executive board. MASTEL is the Telecommunications Association of Indonesia.

Today, CSM as market leader is holding 64% market share among VSAT public operators …

Industri Vsat Di Indonesia, Dan Peranan Csm Saat Ini Dan Di Masa Depan, Gregorius Parlindungan Hutahaean

Online Journal of Space Communication

PT Citra Sari Makmur, atau "CSM", memulai pengoperasian VSAT pada tahun 1989, yang kemudian berkembang menjadi operator VSAT pertama di Indonesia.

Pada mulanya VSAT terutama ditujukan kepada pasar perusahaan (korporasi) di Indonesia: yakni badan-badan hukum yang beroperasi secara nasional dan membutuhkan komunikasi data on-line untuk transaksi-transaksi keuangannya, online integrated data base dan juga dalam konsolidasi laporan.

CSM dibangun dan dipimpin oleh seorang pengusaha Indonesia yang memiliki visi ke depan, Bapak Subagio Wirjoatmodjo, yang sekarang ini juga aktif sebagai anggota Dewan Pengurus Harian MASTEL (Masyarakat Telematika Indonesia, the Indonesian Infocom Society).

Saat ini CSM merupakan pelaku pasar yang menguasai 64% pangsa …

Bagaimana Membuat Indonesia Terhubung: Melayani Yang Belum Terlayani, Chrisma Albandjar, Hilman A. Rasyid

Online Journal of Space Communication

Sudah 126 tahun berlalu sejak Alexander Graham Bell untuk pertama kalinya menciptakan telepon, serta sekitar 50 tahun yang lalu Indonesia yang merdeka memiliki perusahaan teleponnya sendiri.

Namun, dewasa ini, di tahun 2004, penetrasi telepon (jumlah telepon setiap 100 penduduk) di Indonesia hanya 10,45 persen, termasuk sambungan telepon tetap maupun sambungan bergerak (seluler). Angka ini adalah angka yang dipublikasikan oleh Direktorat Jenderal Pos dan Telekomunikasi.Tulisan ini hendak menggambarkan masalah-masalah pokok di Indonesia dalam meningkatkan angka penetrasi telepon, serta beberapa solusi untuk mengatasinya.

Connecting Indonesia: Serving The Unserved, Chrisma Albandjar, Hilman A. Rasyid

Online Journal of Space Communication

It has been 126 years since Alexander Graham Bell invented the telephone and around 50 years since Indonesia had its own telephone company.

Unfortunately, the penetration of telephones in Indonesia today (2004), counting fixed as well as mobile telephone lines in use, is only 10.45% according to the figures published by the Directorate of Post and Telecommunications.

This paper will point out the inherent problems Indonesia has with regards to telephone penetration and take you through some of the solutions to overcome them.

Distance Education Via Satellite: An Early Case Study Of The Indonesian Distance Education Satellite System, Willard D. Shaw

Online Journal of Space Communication

In 1980, the U.S. Agency for International Development initiated the AID Rural Satellite Program (RSP) to explore the potential of telecommunications as a means of extending scarce expert resources and expanding educational opportunities to remote and rural areas. Building on simple, interactive, and inexpensive telephone-based technologies, the Program developed teleconferencing systems for use as a development tool. Three pilot projects-in Indonesia, the West Indies, and Peru-were implemented to test and demonstrate that audioteleconferencing could reliably and affordably support development activities in education, health and agriculture.

In Indonesia and the West Indies, distance education programs were established with national universities. Linking …

Perjalanan Telkom Dalam Mengoperasikan Satelit Komunikasi Untuk Melayani Kepulauan Indonesia, Tonda Priyanto

Online Journal of Space Communication

Pada tahun 1976 Indonesia menjadi negara ketiga di dunia yang mengoperasikan Sistem Komunikasi Satelit Domestik dengan menggunakan Satelit GSO, yakni sistem Palapa A. Sistem satelit ini memberikan layanan teleponi dan faksimil antarkota di Indonesia dan juga menjadi infrastruktur utama pendistribusian program televisi. Saat ini, TELKOM sudah mengoperasikan jaringan komunikasi satelit selama 28 tahun. Dalam rentang waktu itu, TELKOM mengalami berbagai penyempurnaan teknologi, peningkatan dalam jasa-jasa nilai-tambah, serta juga perubahan-perubahan dalam regulasi. Saat ini TELKOM mengoperasikan dua satelit, PALAPA B4 dan TELKOM-1 untuk memberikan layanan telephony trunking, yang juga mencakup untuk sistem-sistem seluler, dan berperan sebagai tulang punggung data dan Internet …

Historical Overview: The Journey Of Telkom In Operating Communications Satellites To Serve The Indonesian Archipelago, Tonda Priyanto

Online Journal of Space Communication

n 1976, Indonesia became the 3rd nation in the world operating a Domestic Satellite Communication System using GSO Satellites, the PALAPA A system. This satellite system provided telephony and facsimile services between cities in Indonesia and became the main TV program distribution infrastructure.

TELKOM* has been operating satellite communication networks for almost 30 years, TELKOM has experienced technology improvements, value added service improvements and also changes in regulations. Nowadays, TELKOM operates 2 satellites, PALAPA B4 and TELKOM-1, for telephony trunking for cellular systems and as data and Internet backbone throughout Indonesia. This paper is intended to describe the journey of …

Berani Menghadapi Tantangan Teknologi Satelit: Terobosan Nasional Dan Peran Indonesia Di Forum-Forum Internasional, Arnold Djiwatampu

Online Journal of Space Communication

Untuk menyegarkan ingatan kita, sistem satelit domestik Palapa merupakan terobosan teknologi untuk mencapai daerah-daerah terisolasi dan memicu kegiatan-kegiatan usaha.

INTELSAT mulai membuka cakrawala baru untuk komunikasi satelit internasional yang handal, dan Indonesia telah mengambil keputusan bijak untuk segera turut serta, meskipun dihadang berbagai kesulitan di bidang ekonomi.

Indonesia harus mengambil keputusan-keputusan yang penting pada waktu ITU WARC-ORB '85 dan '87 sejalan dengan kepentingan komunitas dunia dan kepentingan nasionalnya sendiri. Bekerja sama dengan operator-operator Mobile Satellite Service (MSS) lainnya, Indonesia mendapatkan persetujuan pada WRC-95 untuk memperbaiki pita frekuensi MSS yang terfragmentasi, serta tambahan alokasi di WRC-2003.

Indonesia ikut serta pula dalam …

Historical Overview: Planning And Development Of Indonesia's Domestic Communications Satellite System Palapa, Marwah Ibrahim

Online Journal of Space Communication

This paper is taken from the author's dissertation written in 1989, entitled The Application of Communications Satellite in Developing Countries: The Case of Indonesia.

Artikel ini merupakan ringkasan dari disertasi penulis berjudul The Application of Communications Satellite in Developing Countries: The Case of Indonesia yang ditulis pada tahun 1989 untuk meraih gelar doktor di American University, Washington. Secara ringkas artikel ini menggambarkan sejarah awal dari Sistem Sateli Komunikasi Domestik Palala, mencakup dari alasan-alasan perlunya Indonesia memiliki sistem satelit seperti itu serta sejarah ringkas pembelian hingga pelucuran satelit Palapa. Pada saat itu, keputusan untuk memiliki satelit sendiri merupakan keputusan yang berani, …

Historical Overview: Braving The Challenge Of Satellite Technologies: National Breakthroughs And Indonesia's Role In International Forums, Arnold Djiwatampu

Online Journal of Space Communication

At the time INTELSAT made available for the first time reliable international satellite communication in the 1960's, Indonesia made a wise decision to join the Consortium of Satellite-Using Nations, notwithstanding the economic hardships it posed to participate. Later in the 1970's, the launch of Indonesia's Palapa domestic satellite was a breakthrough technology for addressing isolated areas, and triggering business activities.

Indonesia had crucial decisions to make during ITU's WARC-ORB 1985 and 1987 regulatory deliberations in the interest of the global community and its own national interest. In cooperation with other Mobile Satellite Services (MSS) operators, Indonesia obtained an endorsement at …

Issue 8: From The Guest Editor, Sukarno Abdulrachman

Online Journal of Space Communication

Selamat Datang di edisi 8 dari majalah "Online Journal of Space Communication," yang merupakan Terbitan Khusus dengan tema "Peran Satelit dalam Pembangunan Nasional Indonesia."

Pada saat perkembangan teknologi satelit di dunia masih berada pada tahap sangat awal, Indonesia sudah menyadari bahwa penggunaan angkasa luar untuk keperluan damai pada umumnya, dan komunikasi melalui satelit pada khususnya, dapat berdampak sangat positif dan dapat berperan penting dalam pembanguna nasional Indonesia.

Indonesia sebagai negara kepulauan terbesar di dunia, dengan penduduk lebih dari 200 juta manusia yang tersebar tidak merata di antara ribuan pulau, menghadapi tantangan utama yaitu membangun, memelihara serta mengembangkan prasarana yang bermanfaat …

Computational Frameworks For Multi-Robot Cooperative 3d Printing And Planning, Laxmi Prasad Poudel

Graduate Theses and Dissertations

This dissertation proposes a novel cooperative 3D printing (C3DP) approach for multi-robot additive manufacturing (AM) and presents scheduling and planning strategies that enable multi-robot cooperation in the manufacturing environment. C3DP is the first step towards achieving the overarching goal of swarm manufacturing (SM). SM is a paradigm for distributed manufacturing that envisions networks of micro-factories, each of which employs thousands of mobile robots that can manufacture different products on demand. SM breaks down the complicated supply chain used to deliver a product from a large production facility from one part of the world to another. Instead, it establishes a network …

Precoder Design For Communication-Efficient Distributed Mimo Receivers With Controlled Peak-Average Power Ratio, Vinay A. Vaishampayan

Publications and Research

We consider the problem of communicating over a relay-assisted multiple-input multiple-output (MIMO) channel with additive noise, in which physically separated relays forward quantized information to a central decoder where the transmitted message is to be decoded. We assume that channel state information is available in the transmitter and show that the design of a rational-forcing precoder - a precoder which is matched to the quantizers used in the relays - is beneficial for reducing the symbol error probability. It turns out that for such rational-forcing precoder based systems, there is natural tradeoff between the peak to average power ratio in …

Bayesian Adaptive Path Allocation Techniques For Intra-Datacenter Workloads, Ali Malik, Ruairí De Fréin, Chih-Heng Ke, Hasanen Alyasiri, Obinna Izima

Conference papers

Data center networks (DCNs) are the backbone of many cloud and Internet services. They are vulnerable to link failures, that occur on a daily basis, with a high frequency. Service disruption due to link failure may incur financial losses, compliance breaches and reputation damage. Performance metrics such as packet loss and routing flaps are negatively affected by these failure events. We propose a new Bayesian learning approach towards adaptive path allocation that aims to improve DCN performance by reducing both packet loss and routing flaps ratios. The proposed approach incorporates historical information about link failure and usage probabilities into its …

Grammatical Evolution For Detecting Cyberattacks In Internet Of Things Environments, Hasanen Alyasiri, John Clark, Ali Malik, Ruairí De Fréin

Conference papers

The Internet of Things (IoT) is revolutionising nearly every aspect of modern life, playing an ever greater role in both industrial and domestic sectors. The increasing frequency of cyber-incidents is a consequence of the pervasiveness of IoT. Threats are becoming more sophisticated, with attackers using new attacks or modifying existing ones. Security teams must deal with a diverse and complex threat landscape that is constantly evolving. Traditional security solutions cannot protect such sys- tems adequately and so researchers have begun to use Machine Learning algorithms to discover effective defence systems. In this paper, we investigate how one approach from the …

Grid Strength Assessment Trough Q-V Modal Analysis And Maximum Loadability Of A Wind-Dominated Power System Using P-Q Regions, Pierre Obed Dorile

Graduate Theses and Dissertations

Climate change is a menace to the existence of the world and policymakers are trying totackle this phenomenon by deploying large-scale wind farms into their grids. Among them, wind energy shows a promising future to substitute the traditional power plants. However, the deployment of these wind farms into the grid is not a panacea that does not pose any challenges to the grid operators. Keeping the power system voltage stable while considering the strength of the transmission grid is among the major challenges facing by the transmission system operators. Amid normal operation and fault conditions, wind farms should help the …

Forecasting Stock Exchange Data Using Group Method Of Data Handling Neural Network Approach, Marzieh Faridi Masouleh, Ahmad Bagheri

Knowledge Engineering and Data Science

The increasing uncertainty of the natural world has motivated computer scientists to seek out the best approach to technological problems. Nature-inspired problem solving approaches include meta-heuristic methods that are focused on evolutionary computation and swarm intelligence. One of these problems significantly impacting information is forecasting exchange index, which is a serious concern with the growth and decline of stock as there are many reports on loss of financial resources or profitability. When the exchange includes an extensive set of diverse stock, particular concepts and mechanisms for physical security, network security, encryption, and permissions should guarantee and predict its future needs. …

Backpropagation Neural Network With Combination Of Activation Functions For Inbound Traffic Prediction, Purnawansyah Purnawansyah, Haviluddin Haviluddin, Herdianti Darwis, Huzain Azis, Yulita Salim

Knowledge Engineering and Data Science

Predicting network traffic is crucial for preventing congestion and gaining superior quality of network services. This research aims to use backpropagation to predict the inbound level to understand and determine internet usage. The architecture consists of one input layer, two hidden layers, and one output layer. The study compares three activation functions: sigmoid, rectified linear unit (ReLU), and hyperbolic Tangent (tanh). Three learning rates: 0.1, 0.5, and 0.9 represent low, moderate, and high rates, respectively. Based on the result, in terms of a single form of activation function, although sigmoid provides the least RMSE and MSE values, the ReLu function …

Do Missing Link Community Smell Affect Developers Productivity: An Empirical Study, Toukir Ahammed, Sumon Ahmed, Mohammed Shafiul Alam Khan

Knowledge Engineering and Data Science

Missing link smell occurs when developers contribute to the same source code without communicating with each other. Existing studies have analyzed the relationship of missing link smells with code smell and developer contribution. However, the productivity of developers involved in missing link smell has not been explored yet. This study investigates how productivity differs between smelly and non-smelly developers. For this purpose, the productivity of smelly and non-smelly developers of seven open-source projects are analyzed. The result shows that the developers not involved in missing link smell have more productivity than the developers involved in smells. The observed difference is …

Indonesian Sentence Boundary Detection Using Deep Learning Approaches, Joan Santoso, Esther Irawati Setiawan, Christian Nathaniel Purwanto, Fachrul Kurniawan

Knowledge Engineering and Data Science

Detecting the sentence boundary is one of the crucial pre-processing steps in natural language processing. It can define the boundary of a sentence since the border between a sentence, and another sentence might be ambiguous. Because there are multiple separators and dynamic sentence patterns, using a full stop at the end of a sentence is sometimes inappropriate. This research uses a deep learning approach to split each sentence from an Indonesian news document. Hence, there is no need to define any handcrafted features or rules. In Part of Speech Tagging and Named Entity Recognition, we use sequence labeling to determine …

Face Images Classification Using Vgg-Cnn, I Nyoman Gede Arya Astawa, Made Leo Radhitya, I Wayan Raka Ardana, Felix Andika Dwiyanto

Knowledge Engineering and Data Science

Image classification is a fundamental problem in computer vision. In facial recognition, image classification can speed up the training process and also significantly improve accuracy. The use of deep learning methods in facial recognition has been commonly used. One of them is the Convolutional Neural Network (CNN) method which has high accuracy. Furthermore, this study aims to combine CNN for facial recognition and VGG for the classification process. The process begins by input the face image. Then, the preprocessor feature extractor method is used for transfer learning. This study uses a VGG-face model as an optimization model of transfer learning …

Detection Of Disease And Pest Of Kenaf Plant Based On Image Recognition With Vggnet19, Diny Melsye Nurul Fajri, Wayan Firdaus Mahmudy, Titiek Yulianti

Knowledge Engineering and Data Science

One of the advantages of Kenaf fiber as an environmental management product that is currently in the center of attention is the use of Kenaf fiber for luxury car interiors with environmentally friendly plastic materials. The opportunity to export Kenaf fiber raw material will provide significant benefits, especially in the agricultural sector in Indonesia. However, there are problems in several areas of Kenaf's garden, namely plants that are attacked by diseases and pests, which cause reduced yields and even death. This problem is caused by the lack of expertise and working hours of extension workers as well as farmers' knowledge …

Reference Design Of An Online Emulation And Hot-Patching Approach For Power Electronic Controller Validation, Estefano Soria Pearson

Graduate Theses and Dissertations

This thesis aims to develop a reference design of an online security system approach embedded in a power electronic controller for cybersecurity purposes. Cybersecurity in power electronics focuses on reducing vulnerabilities in the system, where most reside in the communication with the hardware devices. Although methods to secure communications lessen the probability and effects of cyber-attacks, discovering vulnerabilities is inevitable. This thesis attempts to provide a fail-safe approach to securing the system by targeting the safety of the power-electronic controller. This approach applies an additional security layer in case of a malicious or accidental controller firmware malfunction.

The online security …

Monte-Carlo-Based Analysis Of Traffic Flow For Urban Air Mobility Vehicles, Sara Ghayouraneh

Graduate Theses and Dissertations

The research conducted in this dissertation is focused on developing a simulation tool that can predict the traffic flow patterns of the Urban Air Mobility vehicles to alleviate some of the challenges related to their traffic management. First, an introduction to the concept of Urban Air Mobility is given, the usage of Automatic Dependent Surveillance-Broadcast systems for Urban Air Mobility vehicles is suggested and dynamic addressing concept is introduced as an answer to a part of air traffic management and address scarcity challenge for Urban air Mobility vehicles. Next, in order to simulate the traffic flow patterns of the Urban …

Efficiently Estimating Survival Signature And Two-Terminal Reliability Of Heterogeneous Networks Through Multi-Objective Optimization, Daniel Bruno Lopes Da Silva

Graduate Theses and Dissertations

The two-terminal reliability problem is a classical reliability problem with applications in wired and wireless communication networks, electronic circuit design, computer networks, and electrical power distribution, among other systems. However, the two-terminal reliability problem is among the hardest combinatorial problems and is intractable for large, complex networks. Several exact methods to solve the two-terminal reliability problem have been proposed since the 1960s, but they have exponential time complexity in general. Hence, practical studies involving large network-type systems resort to approximation methods to estimate the system's reliability. One attractive approach for quantifying the reliability of complex systems is to use signatures, …

Issue 7: Contributors, David Hartshorn, Martin Jarrold

Online Journal of Space Communication

List of Issue 7 Contributors.

Future Solutions: Access To Ict: A Tale Of Three Briefings, David Hartshorn

Online Journal of Space Communication

If your inbox is anything like mine, then you already know that the publication of satellite communications reports has become an industry unto itself. But that's not to say that it's always an end unto itself. On the contrary.