Hidayati, Nurul (2018) Analisis dan Implementasi Relay Selection dengan Network Coding pada Modul WARP. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Skema single relay selection digunakan untuk memilih satu relay yang terbaik dari beberapa relay. Metode yang digunakan dalam menentukan relay terbaik adalah memilih BER terkecil. Konsep network coding digunakan untuk menghemat bandwidth dan memperbesar throughput. Pada penelitian ini dilakukan pemilihan relay terbaik dengan skema network coding pada kanal real, WARP (Wireless Open Access Research Platform). Pengukuran dilakukan dengan kondisi linkungan outdoor dan indoor. Parameter yang dicari yaitu BER dan throughput. Dari pengukuran relay selection dan network coding dengan kondisi LOS dan NLOS serta variasi jarak pengukuran antara user, didapatkan bahwa secara keseluruhan nilai BER lebih kecil saat kondisi LOS dibandingkan NLOS. Nilai BER akan meningkat seiring dengan pertambahan jarak pengukuran. Untuk perbandingan skema network coding dan tanpa network coding, didapatkan bahwa pada pengukuran dengan kondisi LOS, nilai BER bernilai 0.0004 saat diberikan nilai gain sebesar 40 atau level daya pancar sebesar -14.5 dBm, untuk skema network coding. Sedangkan untuk kondisi tanpa network coding BER mencapai 0.0005 saat diberikan nilai gain yang sama. Pada proses pemilihan relay berdasarkan variasi letak relay terhadap user menunjukkan bahwa relay terbaik selain dipilih berdasarkan BER terkecil juga berdasarkan jarak terpendek (minimum distance), yaitu relay yang terdekat dengan user 1. Pemilihan relay dengan jarak terpendek dari source, meminimalkan level daya yang dipancarkan jadi BER menjadi lebih kecil. Network coding unggul dalam waktu transmisi data, karena hanya membutuhkan 3 time slot dalam mengirim data dari user 1 ke user 2 dibandingkan tanpa menggunakan network coding yang membutuhkan 4 time slot. Selain itu kondisi LOS network coding mampu menaikkan throughput sebesar 23% dibandingkan tanpa network coding. Sedangkan kondisi NLOS network coding mampu menaikkan throughput sebesar 21%.
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A single relay selection scheme is used to select one of the best relay from multiple relays. The method used in determining the best relay is to choose the smallest BER. The concept of network coding is used to efficient bandwidth and increase throughput. In this research, the best relay selection with network coding scheme on real channel, WARP (Wireless Open Access Research Platform). We measure in outdoor and indoor environment. The measured parameters are BER and throughput. Based on measurements of relay selection and network coding with LOS and NLOS conditions and variation of distance between users, it was found that overall BER values of LOS are smaller than BER values of NLOS. The values of BER increase along measurement of distance increase. For comparison of network coding scheme and without network coding, it is found that in the measurement with LOS condition, the value of BER is 0.0004 when given a gain value of 40 or a transmit power level of -14.5 dBm, for network coding scheme. As for the condition without network coding, the value of BER is 0.0005 when given the same gain value. In the relay selection process, based on the relay location variation to the user shows that the best relay based on the smallest BER and the shortest distance (minimum distance), which is the relay closest to the user 1. Selection of the relay with the shortest distance minimizes the power level emitted thus the BER becomes smaller. The throughput of network coding is better than without using network coding, because network coding only need 3 timeslots for sending data from user 1 to user 2, in the other hand the condition without using network coding requires 4 timeslots. Network coding in LOS condition can increase throughput by 23% compared to without network coding. In NLOS, network coding can increase throughput by 21%.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Network Coding, Relay Selection, WARP, Bit Error Rate, Throughput, LOS, NLOS, Timeslot |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5102.9 Signal processing. T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5103.2 Wireless communication systems. Two way wireless communication T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5105 Data Transmission Systems T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunication |
| Divisions: | Faculty of Electrical Technology > Electrical Engineering > 20101-(S2) Master Thesis |
| Depositing User: | Nurul Hidayati |
| Date Deposited: | 24 Jun 2021 04:33 |
| Last Modified: | 24 Jun 2021 04:33 |
| URI: | http://repository.its.ac.id/id/eprint/54999 |
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