piconet


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piconet

Meaning "tiny" network, a piconet is a Bluetooth network composed of two or more Bluetooth devices that operate in close proximity on the same channel and frequency hopping sequence. Piconets operate in both ad hoc (peer-to-peer) and infrastructure (central base station) modes of operation.

Masters, Slaves and Scatternets
In a piconet, one device is the master, which establishes the frequency hopping scheme, and there can be up to seven active and 255 inactive slave devices. However, a slave in one piconet can be a master in another, creating a chain of piconets called a "scatternet" that extends the distance between all devices. See Bluetooth.
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Caption: Figure 5: Piconet topology implemented through Bluetooth connection.
To find a route path of a destination, a source delivers a route request message to its master in its piconet. If a destination is not found in a piconet, the master sends the message to a relay node in another piconet.
Since the master has to poll data in a piconet, in the first time slot, a packet is requested and then the client keeps the channel for a maximum of five time slots to send the multislot ACL packet.
For comparisons two networks were used: 1) the Iowa City Airport Piconet (e.g., Krajewski et al., 2003) and its expansion which includes 25 sites spaced on approximately a 5 km (3.1 mi) grid with dual tipping bucket platforms (Figure 1); and 2) the Iowa State University Ag-Climate network.
A network of Bluetooth devices is called a piconet. Each piconet can support a maximum of eight devices.
The tool uses a nonintrusive approach to capture Bluetooth data transmitted in a piconet. The unit is in a PC card form factor and features 32 MB of dedicated recording memory.
The kit also allows Piconet applications to be tested, this involves eight different Bluetooth devices communicating with each other and swapping information.
PICONET -- An impromptu wireless LAN created when Bluetooth devices connect to one another.
Each piconet uses a distinct time domain sequence (four piconets).