Electronic Theses and Dissertation

Seiring perkembangan teknologi informasi, kebutuhan akan jaringan nirkabel berkapasitas tinggi semakin meningkat, sehingga wireless fidelity (wi-fi) 6 (ieee 802.11ax) hadir dengan peningkatan throughput dan penurunan delay untuk mendukung aplikasi modern. di fakultas teknik universitas syiah kuala (usk), jaringan yang masih menggunakan wi-fi 4 (802.11n) sering mengalami kemacetan saat banyak pengguna mengakses layanan internet, terutama pada jam sibuk seperti absensi perkuliahan. kondisi tersebut menunjukkan perlunya teknologi jaringan yang lebih efisien dan mampu menangani beban trafik yang tinggi. selain peningkatan pada lapisan fisik, performa jaringan juga dipengaruhi oleh protokol transport yang digunakan. bottleneck bandwidth and round-trip propagation time (bbr) merupakan algoritma congestion control modern yang dikembangkan google untuk mengatasi keterbatasan algoritma konvensional, sedangkan quic udp internet connections (quic) dirancang untuk mengurangi delay dan meningkatkan efisiensi komunikasi berbasis udp. penelitian ini menggunakan metode kuantitatif dengan pendekatan simulasi menggunakan network simulator 3 (ns-3.43) untuk menganalisis dan membandingkan performa tcp bbr dan udp quic pada jaringan wlan berbasis wi-fi 6 (ieee 802.11ax). parameter quality of service (qos) yang dianalisis meliputi throughput, delay, jitter, dan packet loss. hasil simulasi menunjukkan bahwa udp quic memperoleh throughput rata-rata sebesar 2,36 mbps, lebih tinggi dibandingkan tcp bbr sebesar 1,52 mbps. namun, tcp bbr menunjukkan performa yang lebih baik pada parameter delay dan packet loss, dengan nilai delay rata-rata sebesar 28,09 ms dan packet loss sebesar 0,98%, dibandingkan udp quic yang memiliki delay sebesar 288,29 ms dan packet loss sebesar 54,01%. sementara itu, pada parameter jitter, udp quic memperoleh nilai rata-rata sebesar 3,40 ms, lebih rendah dibandingkan tcp bbr sebesar 4,67 ms, sehingga keduanya masih termasuk dalam kategori sangat baik. berdasarkan perhitungan indeks qos, tcp bbr memperoleh nilai 3,75 yang termasuk kategori baik, sedangkan udp quic memperoleh nilai 3,00 yang juga termasuk kategori baik. berdasarkan hasil penelitian, tcp bbr memberikan performa yang lebih stabil dan andal pada kondisi jaringan padat karena mampu mengendalikan kemacetan jaringan dengan lebih efektif. sementara itu, udp quic unggul pada throughput rata-rata dan jitter, tetapi memiliki tingkat packet loss yang lebih tinggi sehingga kurang optimal dalam menjaga keandalan transmisi data secara keseluruhan. kata kunci: wi-fi 6, ieee 802.11ax, tcp bbr, udp quic, ns-3, quality of service (qos)

Along with the rapid development of information technology, the demand for high capacity wireless networks continues to increase. Wireless Fidelity (Wi-Fi) 6 (IEEE 802.11ax) was introduced to provide higher throughput and lower delay in supporting modern applications. At the Faculty of Engineering, Syiah Kuala University (USK), the existing Wi-Fi 4 (802.11n) network frequently experiences congestion when many users simultaneously access the Simkuliah website and other internet services, especially during peak hours such as attendance sessions. This condition indicates the need for a more efficient network technology capable of handling high traffic loads. In addition to improvements at the physical layer, network performance is also influenced by the transport protocol used. Bottleneck Bandwidth and Round-trip Propagation Time (BBR) is a modern congestion control algorithm developed by Google to overcome the limitations of conventional algorithms, while Quick UDP Internet Connections (QUIC) is designed to reduce delay and improve transmission efficiency over UDP-based communication. This study employed a quantitative research method using a simulation approach with Network Simulator 3 (NS-3.43) to analyze and compare the performance of TCP BBR and UDP QUIC on a Wi-Fi 6 (IEEE 802.11ax) WLAN network. The Quality of Service (QoS) parameters analyzed in this study include throughput, delay, jitter, and packet loss. The simulation results show that UDP QUIC achieved an average throughput of 2.36 Mbps, which is higher than TCP BBR with an average throughput of 1.52 Mbps. However, TCP BBR showed better performance in terms of delay and packet loss, with an average delay of 28.09 ms and packet loss of 0.98%, compared to UDP QUIC, which had an average delay of 288.29 ms and packet loss of 54.01%. Meanwhile, in terms of jitter, UDP QUIC obtained an average value of 3.40 ms, which is lower than TCP BBR with 4.67 ms, although both protocols are still categorized as very good. Based on the QoS index calculation, TCP BBR obtained a score of 3.75, which falls into the good category, while UDP QUIC obtained a score of 3.00, which is also categorized as good. Based on these results, TCP BBR provides more stable and reliable performance under dense network conditions because it can control network congestion more effectively. Meanwhile, UDP QUIC is superior in average throughput and jitter, but it has a higher packet loss rate, making it less optimal in maintaining overall data transmission reliability. Keywords: Wi-Fi 6, IEEE 802.11ax, TCP BBR, UDP QUIC, NS-3, Quality of Service (QoS)