Abstrak

ABSTRAK

           Video conference adalah seperangkat teknologi telekomunikasi interaktif yang memungkinkankan dua pihak atau lebih di lokasi berbeda dapat berinteraksi melalui pengiriman dua arah audio dan video secara bersamaan. Teknologi utama yang digunakan dalam sistem video conference adalah kompresi digital dari suara dan video stream yang real time. Ukuran kualitas untuk video conference diantaranya packet delay variation, end-to-end delay dan packet loss. UMTS merupakan standar teknologi 3G (third generation) untuk komunikasi seluler dan telah mensupport jenis layanan berbasis packet switched dengan peningkatan kecepatan 2 Mbps.

            Pada Tugas Akhir ini dilakukan simulasi untuk mengetahui karakteristik user QoS Video Conference yang ditransmisikan pada jaringan UMTS. Parameter simulasi yang diamati adalah end-to-end delay (sec), packet delay variation (sec), dan packet loss (%). Simulasi dilakukan berdasarkan scenario untuk mengetahui pengaruh jangkauan node B apabila digunakan transmit power sebesar 1 watt. Scenario untuk mengetahui beban trafik dengan menambahkan user pada node B yang sama dan node B yang berbeda.

            Berdasarkan hasil analisis diperoleh bahwa, jangkauan Node B diukur dari level minimum sinyal yang diterima sejauh 1,1 km. Untuk pengaruh jumlah user dari minimum menjadi maksimum dengan Node B sama dan berbeda cukup berpengaruh terhadap perubahan nilai parameter QoS dengan jumlah user maksimum mengalami peningkatan nilai parameter Qos dari jumlah user minimum dan lokasi Node B berbeda mengalami peningkatan nilai parameter QoS daripada lokasi Node B yang sama.

Kata kunci : video conference, UMTS, Node B, packet delay variation, end-to-end delay, packet loss, jumlah user.

Analysis of the Influence of User Characteristics on QoS Video Conference UMTS Network With Outdoor Propagation Model

ABSTRACT

Video conferencing is a set of interactive telecommunication technologies which make possible two or more parties in different locations to interact via two-way delivery of audio and video simultaneously. The main technology used in video conferencing system is digital compression of audio and video streams in real time. Measure of quality for video conferencing include packet delay variation, end-to-end delay and packet loss. UMTS is a 3G technology standard (third generation) mobile communications and has been supporting the type of packet switched-based services with increased speed of 2 Mbps.

In the final project was carried out simulations to investigate the characteristics of user QoS Video Conference is transmitted on UMTS networks. Simulation of the observed parameters are end-to-end delay (sec), packet delay variation (sec), and packet loss (%). The simulation was performed based on the range of scenarios to determine the effect of node B when used at 1 watt transmit power. Scenarios to determine the traffic load by adding a user on the same node B and node B are different.

Based on the analysis results obtained that, the range of Node B is measured from the minimum level of the received signal as far as 1 km. To influence the amount of minimum to maximum user with the same Node B and different enough to affect the change of QoS parameter values ​​with the maximum number of users has increased QoS parameter values ​​of the minimum user amount and location of different Node B an increase QoS parameter value than the same Node B locations.

Keywords : video conferencing, UMTS, Node B, packet delay variation, end-to-end delay, packet loss, number of users.