ALGORITMA ADAPTIF UNTUK HUBUNGAN VIRTUAL PADA KONTROL ALIRAN BERBASIS UMPAN BALIK DI WILAYAH LUAS JARINGAN ATM

• Main Author: Munadi, Rendy
• Format: Theses
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/4601
• Institution: Institut Teknologi Bandung

<b>Abstract :</b><p align=\"justify\">Adaptive flow control Algorithm can be applied into wide area ATM network to allocate bandwidth to virtual connection. Flow control uses closed loop control mechanism, i.e , a reactive control mechanism winch dynamically control pe rnt ttable transmission speed for any virtual connection by using I:aback information of the network. Information of the network is in the form of bit that can identify whether queue length in buffer is above or below given threshold. By this indication bit the source of cell sending can be controlled.<p align=\"justify\"> <br /> The early investigation done is limited to 24VC connection and in 155 Mbps transmission speed with 6.5 cells buffer threshold. Considering that it is n enough, then , a further investigation is done with increasing connection up to 100 VC, 600 Mbps transmission speed, and buffer threshold in a wide range.<p align=\"justify\"> <br /> Adaptive algorithm simulation results show that by using stability criterion on single virtual connection we can find the range of gain ratio parameter used on proper damping, so , fairness can be made easier in multiple virtual connections. There are two parameter which one important for every virtual connection , i.e, minimum bandwidth parameter and weigh factor to gain bandwidth share that provided by the network. Proper selection on the two parameters gives different service. Aggregate speed response showed that there is degradation of network bandwidth use (<90%). This situation can be overcome by increasing the transmission speed , lengthening update time, and enlarging the buffer threshold.