You can use the widget below to configure the number of nodes that will be used for your experiment (between 3 to 5 nodes), the DASH policy used for choosing the video rate (between 1 to 3), and the times of the handover events, keeping in mind that the duration of the whole video streaming is 60 seconds.
For example, in case that the selected number of nodes is 5, you will observe the following topology:
Figure 2: 5-nodes Topology Example
where there is a label under each node with its role and identity. The upper-left node is the DASH server, the upper-right node is the DASH client, eNodeB connects the two nodes with the LTE/WiMAX technology, while the other nodes are used for connecting them through a 4-hop ad-hoc WiFi network. The widget is responsible for reserving the eNodeB and 5 nodes from the NITOS testbed, as well as to develop this network. Then, by using the OMF framework, an experiment will be developed and executed according to the configured parameters given by you (DASH policy and timing of Handover events).
During the preparation time, messages will be printed to inform you about the current status in the setup of the desired network topology.
At the end, live monitoring of the experiment will be provided through a dashboard including three plots. One is for the used video rate, which is chosen according to your selected DASH policy, one for the status of the packet buffer on the DASH client, and one for the video rate that is streamed over each wireless technology.
In the figure below, you see the results of such an experiment, where the handover from WiFi to LTE is done after 25 seconds of experiment runtime and the handover from LTE to WiFi after 45 seconds (the two moments are noted with blue lines and the end of experiment with a red line). At the end of the experiment, you are able to see the streamed video by clicking on the green button, or to click the blue button to release the resources.
Figure 3: Snapshot of the Dashboard