KLUSTER DNS DALAM TELEKOMUNIKASI UNTUK MANAJEMEN SKALABILITAS

  Layanan Nama Domain (DNS) adalah salah satu layanan di bidang telekomunikasi yang perlu dipertahankan untuk memastikan keberlangsungan komunikasi pada jaringan internet modern. Sebagian besar Penyedia Layanan Internet (ISP) menerapkan sistem rekursif DNS mereka sendiri untuk mempertahankan konten dan layanan ke sisi klien. Tujuan kerja ini adalah skema baru untuk DNS rekursif untuk mempertahankan skalabilitasnya menggunakan pendekatan load balancing berdasarkan pertumbuhan klien tanpa mengorbankan kesinambungan layanan. Pendekatan load balancing yang digunakan dalam pekerjaan ini adalah dengan membandingkan tiga metode load balancing; Least Packet, Round Robin dan Least Connection. Hasil metode terbaik dari perbandingan tiga metode penyeimbangan beban digunakan untuk menguji skalabilitas seluruh sistem DNS, dengan menguji interkoneksi antar node perangkat keras.     Domain Name Service (DNS) is one of services in telecommunication that needed to be maintained to ensure the passage of communication for modern internet. Most Internet Service Provider (ISP) implement their own DNS recursive system to maintain the content and service to client side. This work purpose is a novel scheme for DNS recursive to maintain its scalability using load balancing approach based on the growth of the client without sacrificing the continuity of the service. Load balancing approach used in this work is by comparing three method of load balancing; Least Packet, Round Robin and Least Connection. The best method result from the comparison of three load balancing method is used to test the scalability of whole DNS system, by testing interconnection between hardware nodes. &nbsp

Design and Analysis of Wideband Nonuniform Branch Line Coupler and Its Application in a Wideband Butler Matrix

This paper presents a novel wideband nonuniform branch line coupler. An exponential impedance taper is inserted, at the series arms of the branch line coupler, to enhance the bandwidth. The behavior of the nonuniform coupler was mathematically analyzed, and its design of scattering matrix was derived. For a return loss better than 10 dB, it achieved 61.1% bandwidth centered at 9 GHz. Measured coupling magnitudes and phase exhibit good dispersive characteristic. For the 1 dB magnitude difference and phase error within 3∘, it achieved 22.2% bandwidth centered at 9 GHz. Furthermore, the novel branch line coupler was implemented for a wideband crossover. Crossover was constructed by cascading two wideband nonuniform branch line couplers. These components were employed to design a wideband Butler Matrix working at 9.4 GHz. The measurement results show that the reflection coefficient between the output ports is better than 18 dB across 8.0 GHz–9.6 GHz, and the overall phase error is less than 7∘

KLUSTER DNS DALAM TELEKOMUNIKASI UNTUK MANAJEMEN SKALABILITAS

  Layanan Nama Domain (DNS) adalah salah satu layanan di bidang telekomunikasi yang perlu dipertahankan untuk memastikan keberlangsungan komunikasi pada jaringan internet modern. Sebagian besar Penyedia Layanan Internet (ISP) menerapkan sistem rekursif DNS mereka sendiri untuk mempertahankan konten dan layanan ke sisi klien. Tujuan kerja ini adalah skema baru untuk DNS rekursif untuk mempertahankan skalabilitasnya menggunakan pendekatan load balancing berdasarkan pertumbuhan klien tanpa mengorbankan kesinambungan layanan. Pendekatan load balancing yang digunakan dalam pekerjaan ini adalah dengan membandingkan tiga metode load balancing; Least Packet, Round Robin dan Least Connection. Hasil metode terbaik dari perbandingan tiga metode penyeimbangan beban digunakan untuk menguji skalabilitas seluruh sistem DNS, dengan menguji interkoneksi antar node perangkat keras.     Domain Name Service (DNS) is one of services in telecommunication that needed to be maintained to ensure the passage of communication for modern internet. Most Internet Service Provider (ISP) implement their own DNS recursive system to maintain the content and service to client side. This work purpose is a novel scheme for DNS recursive to maintain its scalability using load balancing approach based on the growth of the client without sacrificing the continuity of the service. Load balancing approach used in this work is by comparing three method of load balancing; Least Packet, Round Robin and Least Connection. The best method result from the comparison of three load balancing method is used to test the scalability of whole DNS system, by testing interconnection between hardware nodes. &nbsp

Uji Coba Pengiriman Data Jarak Dekat Dengan Menggunakan Radio Komunikasi Hf

This paper presents the test result of the data transmission using Differential Phase Shift Keying (DPSK) modulation technique via High Frequency (HF) radio communication. Experiment was done in the laboratory of telecommunication with the distance betweentransmitter and receiver as far as 5 m. The size of the files used by 3kb, with the observation time in the morning at 8:00 to 09:00 am, in the daytime at 12:00 to 13:00 and in the afternoon at 15:00 to 16:00 pm. From the results obtained, the process of sending the data has been successfully received directly with a delivery delay time of 5-10 seconds and still contaminated by noise. Data transmission in the mornings and afternoons relatively cleaner compared to daytime.Makalah ini membahas uji coba pengiriman data menggunakan teknik modulasi Differential Phase Shift Keying (DPSK) melalui radio komunikasi High Frequency (HF). Percobaan dilakukan di dalam Laboratorium Telekomunikasi dengan jarak antara pengirim danpenerima sejauh 5 m. Ukuran file yang digunakan sebesar 3kb, dengan waktu pengamatan pada pagi hari antara jam 08.00 – 09.00, siang antara jam 12.00 – 13.00 dan sore hari antara jam 15.00 – 16.00 WIB. Dari hasil yang diperoleh, proses pengiriman data telah berhasil diterima secara langsung dengan jeda waktu pengiriman 5-10 detik dan masih disertai dengan noise. Pengiriman data yang dilakukan pada pagi hari dan sore hari relatif lebih bersih dibandingkan pada siang hari