# Evaluation of VoIP QoS Performance in Wireless Mesh Networks
## 3 Experimental Setup
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Main Scenarios** & \multicolumn{2}{c}{**Sub-Scenarios Description**} & **Mobility/Speed** & **Short Name** \\ \hline \multirow{5}{*}{First Responders} & 802.11g, 802.11s, Mesh Points, G.711, HWMP & Waypoint & FR1 \\  & 802.11g, 802.11, No Mesh Points, G.711, AODV & Waypoint & FR2 \\  & 802.11g, 802.11s, Mesh Points, G.729, HWMP & Waypoint & FR3 \\  & 802.11g, 802.11s, Mesh Points, G.729, AODV & Waypoint & FR4 \\  & 802.11n, 802.11e, No Mesh Points, G.711, AODV & Waypoint & FR5 \\  & 802.11n, 802.11e, No mesh Points, G.729, AODV & Waypoint & FR6 \\ \hline \multirow{5}{*}{
\begin{tabular}{c} Responders-Random \\ Waypoint \\ 802.11g, 802.11s, Mesh Points, G.711, HWMP \\ 802.11g, 802.11s, Mesh Points, G.729, HWMP \\ 802.11g, 802.11s, Mesh Points, G.729, HWMP \\ 802.11n, 802.11e, No Mesh Points, G.729, AODV \\ 802.11n, 802.11e, No Mesh Points, G.711, AODV \\ 802.11n, 802.11e, No mesh Points, G.729, AODV \\ \hline \multirow{5}{*}{Flooded Village} & 802.11g, 802.11s, Mesh Points, G.711, HWMP & No & FV1 \\  & 802.11g, 802.11s, Mesh Points, G.729, HWMP & No & FV3 \\  & 802.11g, 802.11e, No mesh Points, G.729, AODV & No & FV4 \\  & 802.11n, 802.11e, No Mesh Points, G.711, AODV & No & FV5 \\  & 802.11n, 802.11e, No mesh Points, G.729, AODV & No & FV6 \\ \hline \multirow{5}{*}{Isolated Village} & 802.11g, 802.11s, Mesh Points, G.711, HWMP & No & IV1 \\  & 802.11g, 802.11s, Mesh Points, G.729, HWMP & No & IV3 \\  & 802.11g, 802.11s, No mesh Points, G.729, AODV & No & IV4 \\  & 802.11n, 802.11e, No Mesh Points, G.711, AODV & No & IV5 \\  & 802.11n, 802.11e, No mesh Points, G.729, AODV & No & IV6 \\ \hline \multirow{5}{*}{Platoon} & 802.11g, 802.11s, Mesh Points, G.711, HWMP & Waypoint & PL1 \\  & 802.11g, 802.11s, No Mesh Points, G.711, AODV & Waypoint & PL2 \\  & 802.11g, 802.11s, Mesh Points, G.729, HWMP & Waypoint & PL3 \\  & 802.11g, 802.11s, No mesh Points, G.729, AODV & Waypoint & PL4 \\  & 802.11n, 802.11e, No Mesh Points, G.711, AODV & Waypoint & PL5 \\  & 802.11n, 802.11e, No mesh Points, G.729, AODV & Waypoint & PL6 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Main and sub-scenarios. used in mesh networks to turn every node into a SIP server. However, such exploration is outside the scope of this work and in our experimental scenarios all nodes were able to connect to the SIP server during the entire simulation time. In order to simulate VoIP conversations, we have used the QualNet Simulator and its VoIP traffic generator to simulate a human conversation for 180 s; all calls start 30 s after the simulation starts and end after 300 s of simulation time have elapsed. There are 31 nodes in all scenarios. As reported in [63], with 32 nodes the probability of finding a destination is almost 80% and the data delivery ratio is almost 84%, which is very good for WMNs. Although this may vary based on the type of scenario, we experimented with a fixed number of nodes (30 nodes, of which 15 are VoIP call initiators and 15 are receivers; plus one node as a SIP server) in all scenarios for better comparison of the results. This setup reflects typical real-life cases such as a first responder team with around 30 nodes, a rural area/campus/school/hospital with around 30 nodes, and a platoon with around 30-35 nodes. The receiving nodes are configured to \"Accept Call\" states. The whole simulation time configured for each scenario is 500 s with the consideration of some buffer in case the call extends beyond 300 s.