I.M.B.Nogales., Ph.D. student; supervis. V.Zalud,
Doc.Ing.CSc., (CTU, Prague)
MODELING and EVALUATION
of BLUETOOTH PERSONAL AREA NETWORK
In recent years, wireless ad hoc networks have been
a growing area of research. Bluetooth is a promising new wireless technology,
which enables portable devices to form short-range wireless ad hoc networks,
based on radio signals. These short range ad-hoc wireless networks, called
piconets, operate in the unlicensed 2.45 GHz ISM
(Industrial-Scientific-Medical) band and utilizes 74 MHz of the spectrum, where up to eight devices may be used to configure single or overlapping
piconets. A frequency-hopping
scheme is used to avoid radio interference and add a level of
security to Radio Frequency connections by using a different frequency within
the available ISM band for each data packet transmission. Bluetooth is a Master driven Time Division
Duplex (TDD) system that supports an asynchronous channel for data traffic as
well as synchronous channels for voice traffic. In this paper we present a
model on Network Simulator (NS2) to study piconet Medium Access Control (MAC)
performance. Furthermore, simulations are used to validate the throughput and
delay obtained. These results reveal important performance implications about
the effect of interpiconet interference on communication within devices. We will attempt to explain how
effective the Bluetooth technology in supporting collaborative ad hoc
networking is. The results show that Bluetooth provides good support for
real-time applications adding to the total system capacity, and gives a better
overall throughput with shorter delays.
Figure1 – Bluetooth Piconets
Figure 2 Throughput and Number of Piconets
Literature
1. Bluetooth Special Interest Group /
Specification of the Bluetooth System Core vol.1v1.1 / www.bluetooth.com
2. BlueHoc
/ IBM Project page / www-124.ibm.com/developerworks/projects/bluehoc/
3. Manthos Kazantzidis, Rohit Kapoor, Mario
Gerla, “Bluetooth – An Enabler for Personal Area
Networking”, IEEE Network September, October, 2001