[Studies in Computational Intelligence 481] Artur Babiarz, Robert Bieda, Karol Jędrasiak, Aleksander Nawrat (auth.), Aleksander Nawrat, Zygmunt Kuś (eds.) - Vision Based Systemsfor UAV Applications (2013, Sprin

254 K. Daniec et al.
The idea of using channels was introduced in order to reduce the device addressing
overhead. However, it also improves the security of the data by hiding
the information about the receiver. It is known only for a short period of time during
opening channel. Each communication device can have active 4 sending and 4
receiving channels at the same time.
In order to maintain the connection a single packet with 12 bytes of data is
send. First two bytes contains the same value 0xFF, next two bytes are equal to
two oldest bytes of the sequential number counter, rest of the bytes are the number
of four channels. In case of lost channel transmission continues with the next
channel. The set of channels is recovered with incoming maintaining connection
packets. Sending those packet also forces movement within the network which
prevents from losing connection.
7 Conclusions and Future Work
The article presents the dedicated secure miniature radio communication device
for group of unmanned vehicles. The device is capable of establishing and maintaining
a secure connection on its own, which releases the resources of the vehicles
CPU for more advanced control and navigation algorithms. Therefore by
using the presented device it is possible to implement cooperation schemes in
vehicles in the same group.
The device was designed on basis of previous tests [1],[8] and already tested
using a group of unmanned aerial vehicles. Acquired results prove the possibility
of a secure communication in a range depending of the used antenna but starting
from 2 km. During the performed tests regardless the application in the forest the
connection was stable and reliable which is very promising for future implementations
within project ideas like [11].
References
[1] Topor-Kaminski, T., Żurkowski, R., Grygiel, M.: Selected methods of measuring
the delay in data transmission systems with wireless network interfaces. Acta Phys.
Pol. A 120(3), 182 (2011)
[2] Nawrat, A., Jędrasiak, K.: SETh system spatio-temporal object tracking using combined
color and motion features. In: Chen, S., Li, Q., Hangzhou, C. (eds.) Proc. of
ROCOM 2009, 9th WSEAS International Conference on Robotics, Control and
Manufacturing Technology, WSEAS, May 20-22, p. 67 (2009)
[3] Cheng, C., Hong, L.: Electric Power Automation Equipment (2009)
[4] Srovnal Jr., V., Machacek, Z., Srovnal, V.: Proc. of ICN 2009, 8th International
Conference on Networks, March 1-6, IARIA, Cancun, Mexico, p. 253 (2009)
[5] Dohler, M., Li, Y.: Cooperative Communications: Hardware, Channel and PHY.
John Wiley & Sons, United Kingdom (2010)
[6] Doppler, K., Rinne, M., Wijting, C., Riberio, C., Hugl, K.: IEEE Communications
Magazine 47(12), 42 (2009)