Bluetooth network-the adhoc network concept

Ad hoc network is often local area network or other small area network formed by wireless devices. In Latin, ad hoc literally means "for this," further meaning "for this purpose only," and thus usually temporary. The area of ad hoc networking has gathered much research interests in the past years. Bluetooth is one of the technologies that can be used for ad hoc networking. The original idea of Bluetooth concept was that of cable replacement between portable and/or fixed electronic device. According to the specification, when two Bluetooth devices come into each other\´s communication range, one of them assumes the role of master of the communication and the other becomes the slave. This simple "one hop" network is called a piconet, and may include up to seven active slaves connected to one master. As a matter of fact, there is no limit on the maximum number of slaves connected to one master but only seven of them can be active at time, others have to be in so called parked state. The master unit of a piconet controls the traffic within the piconet by means of polling the slaves according to any preferred algorithm, e.g. Round Robin, which determines how the bandwidth capacity will be distributed among the slave units. The polling of slaves within a piconet results in scheduling of the slaves in the master unit, which is referred to as intra-piconet scheduling. In this paper the usage of Bluetooth ad hoc networking in communication is elaborated. Instead of large-scale networks, small-scale personal area networks are emerging in response to the introduction of short-range radio technologies that is Bluetooth.