EXTENDED LLF: A LEAST-LOADED FIRST (LLF)-BASED HANDOVER ASSOCIATION CONTROL FOR SDN-BASED WIRELESS NETWORK

• Main Author: TATIMMA LARASATI , HARASHTA
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/22369
• Institution: Institut Teknologi Bandung

Association control is a mechanism that regulates the association between stations and access points in the network. Two mechanisms that can be emulated in MininetWiFi are Strongest Signal First (SSF) and Least-loaded First (LLF). In this study, a refinement of LLF-based association control mechanism entitled Extended-LLF that is able to improve the performance of existing LLF mechanism, is developed. <br /> <br /> <br /> <br /> The development of Extended-LLF mechanism is conducted by first evaluating the result of station association in the existing mechanisms. By analyzing the results of the association, LLF mechanism is known to possess a weakness in terms of low acquired RSSI values. Based on this finding, an LLF-based mechanism is designed with the addition of parameter, which is maximum RSSI difference, as a requirement in association decision. Python programming language is used for the implementation in Mininet-WiFi <br /> <br /> <br /> <br /> Based on the tests performed on the mobility scenario with 3 access points and 10 stations, Extended-LLF mechanism provides better RSSI reception than LLF as the existing load balancing mechanism. In terms of performance, Extended-LLF provides an increase over LLF on jitter, packet loss, and throughput by 6.69, 0.38, and 0.04 percent, respectively. However, there is a degaradation of performance in terms of delay by 0.85 percent. Compared to SSF, Extended-LLF results in better performance in terms of delay, jitter, and throughput by 18.58, 13.46, and 0.05 percent, but with performance degradation of packet loss by 5.86 percent.