PENGARUH INTERFERENSI HIDDEN NODE TERHADAP MODEL PREDIKSI KETERSEDIAAN BANDWIDTH DI JARINGAN NIRKABEL

Adhi Rizal

Abstract


Ketersediaan bandwidth merupakan salah satu aspek penting untuk menjamin QoS dalam transmisi data, terutama pada jaringan nirkabel. Walaupun demikian, prediksi ketersediaan pada jaringan nirkabel masih sulit dilakukan karena medium transmisi dapat digunakan oleh beberapa node secara bersamaan. Selain itu jaringan nirkabel juga rentan terhadap pengaruh dari sinyal transmisi yang dihasilkan dari node lain, terutama hidden node. Beberapa penelitian telah dilakukan untuk mengembangkan model prediksi ketersediaan bandwidth. Walaupun demikian, belum terdapat mekanisme terstandarisasi yang digunakan untuk mengevaluasi ketersediaan bandwidth pada jaringan nirkabel. Selain itu tingkat akurasi dari setiap model juga masih belum diketahui ketika diimplementasikan pada jaringan nirkabel, terutama dengan keberadaan hidden node. Oleh karena itu penelitian ini berupaya untuk menginvestigasi kinerja dari setiap model untuk memprediksi ketersediaan bandwidth pada jaringan nirkabel dengan interferensi hidden node. Model prediksi yang dibandingkan adalah Distributed Lagrange Interpolation Based Available Bandwidth Estimation (DLI-ABE), Cognitive Passive Estimation Of The Available Bandwidth (cPEAB),  Improved Available Bandwidth (IAB), dan Available Bandwidth Estimation (ABE). Percobaan dilakukan dalam skala simulasi yang dikembangkan menggunakan simulasi jaringan OMNet++. Hasil penelitian menunjukan bahwa model ABE memperoleh tingkat akurasi yang paling baik sebesar 85,25%.


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DOI: http://dx.doi.org/10.12962/j24068535.v18i1.a930

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