# On the Feasibility of Wireless Multimedia Sensor Networks over IEEE 802.15.5 Mesh Topologies
## 4 Simulation
### Simulation Scenarios  
Simulations consisted of the transmission of commonly used video sequences [34]: Akiyo QCIF, Foreman QCIF and Mobile QCIF. These video sequences were selected because of their different motion, sorted in ascending order according to their motion. Five simulation scenarios were chosen with different numbers of nodes. In the scenarios, nodes were arranged in a regular grid layout, ranging from a \(2\times 2\) network to a \(6\times 6\) network. For each scenario, simulations were performed for various configurations of the WO and AO parameters, resulting in different lengths of the _active duration_, the _inactive duration_ and the number of transmission slots in the _inactive duration_. Table 5 shows the WO-AO combinations used and the length of each period of the SES time structure according to Equations (1) and (2).  
The length of each slot within the _inactive duration_ was chosen to be 10 ms [35]. This was regarded as sufficient for carrying out the transmission of a single data message between two consecutive nodes.  
Table 6 shows the set of network simulation parameters common to all the simulations performed. With regard to the video encoding parameters, the GOP size was set to 25, CRF to 24 and frames per second (FPS) to 25.  
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Time Interval** & **Size (bytes)** & **Type** & **Priority** & **Maximum Size 1** \\ \hline
81,000 & 2281 & 1 & 0 & 100 \\ +77,000 & 288 & 2 & 0 & 100 \\ +1000 & 76 & 2 & 0 & 100 \\ +40,000 & 238 & 2 & 0 & 100 \\ \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) & \(\ldots\) \\ \hline \hline \end{tabular}  
* The Maximum Size, in bytes, corresponds to the maximum payload defined by the 802.15.5 standard, obtained as aMaxMACPayloadSize – meshMaxMeshHeaderLength = \(118-18\) = 100, where aMaxMACPayloadSize = aMaxPHYPacketSize – aMinMPDUOverhead = \(127-9\) = \(118\).  
\end{table}
Table 4: Video1.frag file structure.  
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Wakeup** & **Active** & **Active** & **Wakeup** & **Inactive** & **AD** & **ID** \\
**Order** & **Order** & **Duration (ms)** & **Interval (ms)** & **Duration (ms)** & **Slotis** & **Assignment** & **Assignment** \\ \hline
5 & 1 & 10 & 160 & 150 & 15 & 6.25\% & 93.75\% \\
5 & 2 & 20 & 160 & 140 & 14 & 12.50\% & 87.50\% \\
5 & 3 & 40 & 160 & 120 & 12 & 25.00\% & 75.00\% \\
5 & 4 & 80 & 160 & 80 & 8 & 50.00\% & 50.00\% \\
6 & 1 & 10 & 320 & 310 & 31 & 3.13\% & 96.88\% \\
6 & 2 & 20 & 320 & 300 & 30 & 6.25\% & 93.75\% \\
6 & 3 & 40 & 320 & 280 & 28 & 12.50\% & 87.50\% \\
6 & 4 & 80 & 320 & 240 & 24 & 25.00\% & 75.00\% \\
6 & 5 & 160 & 320 & 160 & 16 & 50.00\% & 50.00\% \\
7 & 1 & 10 & 640 & 630 & 63 & 1.56\% & 98.44\% \\
7 & 2 & 20 & 640 & 620 & 62 & 3.13\% & 96.88\% \\
7 & 3 & 40 & 640 & 600 & 60 & 6.25\% & 93.75\% \\
7 & 4 & 80 & 640 & 560 & 56 & 12.50\% & 87.50\% \\
7 & 5 & 160 & 640 & 480 & 48 & 25.00\% & 75.00\% \\
7 & 6 & 320 & 640 & 320 & 32 & 50.00\% & 50.00\% \\ \hline \hline \end{tabular}
\end{table}
Table 5: Active and inactive durations according to WO–AO.