A Fuzzy Logic-based Decision Support System for Minimizing Delay of VoIP in MANET

Due to its cost-saving and flexibility Voice over Internet Protocol (VoIP) has become one of the most popular applications for voice communication through the Internet. Mobile Ad hoc Network (MANET) is a dynamic wireless network that consists of several mobile devices. In MANET performance issues like high end-to-end delay can significantly affect the Quality of Service (QoS) for VoIP. The performance of MANET may be influenced by the number of mobile nodes and the mobility model parameters like pause time and speed of mobile nodes. Therefore, to accomplish the best performance in MANET, it is essential to choose its ideal parameters. Fuzzy logic can understand linguistic variables and imitate the way of human thinking. This study intends to present a fuzzy logic-based decision support system (FLDSS) to minimize the delay of VoIP in MANET. The FLDSS is used to determine the best MANET parameters that produced low VoIP delay. Network Simulator version 2 (NS2) was utilized to conduct the data collection stage and for evaluation of the model. MATLAB was used to construct the suggested system. The results verified that the proposed system has notably minimized the delay of VoIP packets in MANET.