ABSTRAKSI: Jaringan mobile ad hoc (MANET) dapat dibangun antar peralatan mobile di dalam suatu area tanpa mengharuskan adanya infrastruktur tetap semacam router dan base station. Salah satu protokol ruting untuk jaringan mobile ad hoc yang berkembang adalah Ad hoc On-Demand Distance Vector (AODV). Muncul ketertarikan untuk mengkoneksikan MANET dengan fixed network melalui gateway, yang berfungsi sebagai jembatan penghubung antar mobile node dengan fixed host. Sebelum berkomunikasi tentunya mobile node harus bisa menemukan gateway tersebut, oleh karena itu metode pencarian gateway mutlak diperlukan. Metode pencarian gateway meliputi tiga metode yaitu reaktif, proaktif dan hybrid.Tiap metode pencarian gateway diuji dengan parameter jaringan yang berbeda-beda seperti pertambahan jumlah pengirim, perubahan kecepatan mobile node, interval waktu kirim paket dan interval ruting message. Hasil dari simulasi metode pencarian gateway tersebut dianalisis berdasarkan nilai performansi packet delivery ratio, AODV overhead, average end to end delay, dan throughput.Dari hasil simulasi, metode proaktif dan hybrid menawarkan paket delivery ratio dan throughput yang lebih baik dari metode reaktif. Namun nilai AODV overhead yang besar pada metode proaktif menjadi beban di jaringan. Pengaruh efektifitas AODV ruting message akan menentukan seberapa besar nilai end to end delay yang diperoleh. Pertimbangan pemilihan metode pencarian gateway sangat terpengaruh parameter pengujian yang dilakukan.Kata Kunci : Routing protocol ad hoc, gateway discoveryABSTRACT: Mobile Ad hoc Network (MANET) could be established between mobile devices in certain area without fixed infrastructure like router or base station. One of routing protocols that have been developed is Ad hoc On Demand Distance Vector (AODV). There is interested to connecting MANET with fixed network across gateway, this gateway has function as bridge between mobile node and fixed host. Mobile node must find gateway address before have connectivity between MANET and Fixed network. For that reason, gateway discovery mechanism absolutely needed. Gateway discovery mechanism offers three way, reactive, proactive and hybrid method.For each gateway discovery mechanism tested with different network parameter like number of mobile node sender, velocity changes, packet sending interval, and routing message interval. From the simulation, the result will analyze by performance metric like packet delivery ratio, AODV overhead, Average end to end delay, and throughput.From the simulation, proactive and hybrid mechanism offer higher packet delivery ratio and throughput than reactive. However, AODV overhead in proactive have higher value and can lead constrain in networks. The effectively of AODV routing message will decide how large end to end delay in gateway discovery mechanism. The consideration of gateway discovery mechanism that chosen, influenced by testing parameters.Keyword: Routing protocol ad hoc, gateway discover
