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ITS » Master Theses » Teknik Informatika - S2
Posted by fandikaaqsa@its.ac.id at 26/11/2015 08:54:05  •  912 Views


PEMILIHAN BACKUP NODE UNTUK REDUKSI FEEDBACK IMPLOSION PADA RELIABLE MULTICAST PROTOCOL DENGAN ESTIMASI BANDWIDTH AVAILABILITY DAN PACKET LOSS

BACKUP NODE SELECTION FOR FEEDBACK IMPLOSION REDUCTION IN RELIABLE MULTICAST PROTOCOL USING BANDWIDTH AVAILABILITY AND PACKET LOSS

Author :
DATA, MAHENDRA ( 5112201043 )




ABSTRAK

Saat ini pengiriman data secara massal di internet semakin populer. Sebagai contoh adalah pendistribusian update program atau distribusi materi pembelajaran jarak jauh. Salah satu masalah yang ditimbulkannya adalah pemborosan bandwidth. Multicast protocol dapat dimanfaatkan untuk menyelesaikan masalah ini. Namun multicast protocol tidak reliable sehingga mendorong banyak peneliti untuk merancang reliable multicast protocol. Permasalahan utama dalam merancang reliable multicast protocol adalah besarnya peluang feedback implosion ketika terjadi packet loss. Dalam penelitian ini penulis mengemukakan sebuah metode untuk meminimalisir negative-acknowledgment NAK agar dapat menekan feedback implosion. Pada metode ini tiap node akan memetakan node lain yang berdasarkan tingkat reliabilitasnya dan menjadikannya sebagai backup node. Reliabilitas ini diukur berdasarkan bandwidth availability dan packet loss. Node yang mengalami packet loss akan mengirimkan NAK ke backup node sesuai dengan urutan reliabilitasnya. Backup node akan membalas dengan memberikan paket perbaikan. Tujuannya agar tidak terjadi bottle neck di node pengirim sehingga dapat menurunkan pengiriman NAK berulang kali dari node yang mengalami packet loss. Dari hasil percobaan terbukti metode ini dapat mengurangi peluang terjadinya bottle neck pada node pengirim sehingga dapat meningkatkan peluang terbalasnya NAK yang dikirim dan menurunkan jumlah pengiriman ulang NAK. Namun metode ini memerlukan bandwidth tambahan untuk proses pencarian backup node.


ABSTRACT

Nowadays massive data transmission on the Internet like the distribution of software updates has been increasing. One of the impacts of this phenomenon is bandwidth wasting. Multicast protocols can be used to overcome this problem. But multicast protocol itself is not reliable. It8223s encouraging many researchers to design a reliable multicast protocol. The main problem in designing a reliable multicast protocol is the high possibility of feedback implosion due to packet loss. This research is aimed to reduce Negative- Acknowledgment NAK in order to suppress feedback implosion. In this method node will map other nodes based on the reliability of each node and make it as a backup node. This reliability is measured based on bandwidth availability and packet loss of each backup node. Nodes who experiencing packet loss will send NAK to the backup node with highest reliability. Then backup node will reply by sending repair package. The goal of this method is to avoiding bottle neck at the sender node which can avoid repetitive sending of NAK from nodes that experiencing packet loss. Experimental results proved that this method can reduce the probability of bottle neck condition at the sender node and increase the successfull rate of NAK reply and decrease the chances of NAK retransmission. But this method need an additional bandwidth for backup node discovery process.



KeywordsReliable multicast protocol; Feedback implosion; NAK; Backup node
 
Subject:  Jaringan komputer
Contributor
  1. Waskitho Wibisono, S.Kom, M.Eng, Ph.D
Date Create: 26/11/2015
Type: Text
Format: PDF
Language: Indonesian
Identifier: ITS-Master-51103150001461
Collection ID: 51103150001461
Call Number: RTIf 004.62 Dat p


Source
Master Theses of Informatics Engineering, RTIf 004.62 Dat p, 2014

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Copyright @2015 by ITS Library. This publication is protected by copyright and per obtained from the ITS Library prior to any prohibited reproduction, storage in a re transmission in any form or by any means, electronic, mechanical, photocopying, reco For information regarding permission(s), write to ITS Library




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  1.  ITS-Master-39772-5112201043-abstract_id.pdf - 172 KB
  2.  ITS-Master-39772-5112201043-abstract_en.pdf - 210 KB
  3.  ITS-Master-39772-5112201043-conclusion.pdf - 178 KB




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