A Queuing Model to Evaluate the Network Performance Considering the Heterogeneity and Mobility of Relay Nodes in Disaster Area

This study presented a generic model that provided better QoS for integrated Human-to-Human and Machine-to-Machine communication with various characteristics. The fundamental problem, especially in a congested system, is to improve the system’s effectiveness to satisfy the expected Quality-of-Service level for the integrated communication services since these have mutual interference. Here, the impact of buffer capacity on these services and the effect of heterogeneity and mobility of relay nodes on overall system performance are analyzed to develop a generic model for overcoming this problem. Therefore, the comparative results presented provided a new perspective to carry out threshold analysis with the system capacity and system performance by clarifying the effects of various factors, such as the cost of Machine-to-Machine traffic over Human-to-Human traffic, velocity, and heterogeneity of mobile nodes. According to the numerical results presented, unlike the previous studies, it is possible to use a single buffer to treat the integrated services from the buffering point of view without applying the reservation policy for any service, even for highly utilized systems. The results are also validated using discrete event simulation with less than %5 discrepancy.