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Journal : Jurnal Ilmu Komputer

PEMILIHAN NODE TETANGGA YANG HANDAL DENGAN MEMPERHITUNGKAN SIGNAL STRENGTH DAN LINK QUALITY PADA ZONE ROUTING PROTOCOL DI LINGKUNGAN MANET Ida Bagus Ary Indra Iswara; Waskitho Wibisono
Jurnal Ilmu Komputer Vol 6 No 2: September 2013
Publisher : Informatics Department, Faculty of Mathematics and Natural Sciences, Udayana University

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Abstract

Zone Routing Protocol (ZRP) is a hybrid routing protocol on MANET, because the routing protocol isbase on two protocols, namely IntrAzone Routing Protocol (IARP) and IntErzone Routing Protocol (IERP).Through IARP, each node identifies distance to all nodes in its routing zone. Although the network is very large,the update process is only distribute locally in its routing zone only and not the whole network. While IERPprotocol is responsible to find a route to a node that is located outside the zone. The selection of neighboringnodes completely done by Neighbor Discovery Protocol (NDP), which is performe by the node selection NDP issending beacons broadcast message. NDP only use TTL to decide whether the neighboring nodes in broken ormaintained.In this research, the method of signal strength based link-sensing stability adaptation into the work processof the NDP. This method works based on the signal strength of a node. Signal strength of a node are reliableif the node does not exceed the predetermined threshold value. Reliable nodes that will be stored in theneighbor table and will be a reference to the IARP routing process. Nodes are not reliable will be disconnectedand will not send beacons at the message again.The selection of reliable neighbor nodes by calculating signal strength and link quality is able to improvethe performance of ZRP routing protocols. Protocols tested in scenarios designed by the wide variationarea. The test results showed an increase of 4:13 kbps increase in throughput, a decrease of 9.98 ms e2e delayand routing overhead decreased by 3.83%.
MEKANISME PEMILIHAN MPR DENGAN CONGESTION DETECTION DALAM OLSR PADA MANET I Nyoman Buda Hartawan; Waskitho Wibisono
Jurnal Ilmu Komputer Vol 6 No 2: September 2013
Publisher : Informatics Department, Faculty of Mathematics and Natural Sciences, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (715.942 KB)

Abstract

MANET (Mobile Ad-hoc Network) is a collection of mobile nodes which comunicate each others usingwireless network. MANET does not have fixed network infrastructure. OLSR (Optimized Link State Routing) is arouting protocol in MANET. In OLSR there is a selection of neighbor nodes as MPR (Multi Point Relay) forforwading packet data from source to destination. MANET characteristics which shared medium to comunicatewirelessly, causing congestion vulnerable occurs in intermediate node when packet data transmission fromsource to destination. The congestion that occurs in network can lead to high packet loss and long delay, thuscausing reduction of network performance. This study aims to perform the selection of MPR in OLSR withcongestion detection methods in MANET. Results of the study showed that MPR selection with congestiondetection in OLSR can improve packet delivery ratio and network throughput when packet transmission fromsource to destination. This study simulated on Network Simulator version 2 (NS-2).
PENJADWALAN ALOKASI JOB BERBASIS METODA HEURISTIK PADA LINGKUNGAN GRID INDONESIAN EDUCATION GRID I Nyoman Rudy Hendrawan; Waskitho Wibisono
Jurnal Ilmu Komputer Vol 6 No 2: September 2013
Publisher : Informatics Department, Faculty of Mathematics and Natural Sciences, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (432.504 KB)

Abstract

Scheduling mechanism on a grid system became one of important factor in measuring performance of thegrid system. Moreover, building a grid system which is used for experiment or research is time and cost consuming,and then a grid system simulation can be an alternative. In a previous study has been conducted by designing andsimulating of the grid system which is called Indonesian Education Grid (IndoEdu-Grid). A random allocation jobscheduling method was used in the previous study (the method is called UD-IndoEdu-Grid in the next section).Therefore, in this paper we proposed an allocation job scheduling based on heuristic method called TS-IndoEdu-Grid, and thus expected to improve the performance of the IndoEdu-Grid environment. Experiment results show thatby using the TS-IndoEdu-Grid method could reduce makespan by 20% to UD-IndoEdu-Grid. In flowtime parameterthe TS-IndoEdu-Grid method also produces 94% smaller than the UD-IndoEdu-Grid method