V. OPERATION CHECK
A. Experiment environment
Table I shows the specifications of the Android terminals. Table II shows the specifications of laptops which play a role of tags in the experiment. Figure 3 shows the network topology for the experiment. We conducted the experiment in our university. We used four Android terminals and four laptops. We placed them as shown in the Figure 3. One of the laptops plays a role of the server. The number depicted beside the laptop in the figure indicates the host number of the IP addresses.