About Bluehoc
BlueHoc simulator provides a Bluetooth extension for Network Simulator (ver 2.1b8a). BlueHoc is available for download under IBM Public License (IPL) from IBM developerWorks. It requires ns-2.1b8a which can be obtained from Network Simulator site.
Bluetooth technology
Bluetooth*TM technology provides a low cost,
low power and low complexity solution for ad-hoc wireless connectivity. The technology
is capable of connecting a wide variety of devices like Personal Digital Assistants (PDA),
mobile and cordless phones, headsets, desktops and notebook PCs, digital cameras, home appliances etc.
The applications include eliminating cables/wires between devices like PCs, printers,
modems, projectors, self synchronization between PDAs and PCs, wirelessly connecting
to local area networks (LANs) through access points and internet through mobile phones,
providing home networking solutions etc. Bluetooth
devices can detect, connect and discover services offered by other devices in the vicinity
all without the user being aware of it. The tremendous potential of the technology has led to
its universal acceptance by the industry. At present there are 9 promoter
and over 2000 adopter members of Bluetooth Special Interest Group (SIG).
The Bluetooth Specification
is available royalty free to encourage Bluetooth products.
The Bluetooth project team in IBM Research has been an active participant of the
Bluetooth SIG since its inception in early 1998 and it has led IBM's involvement in the technical
activities of the SIG.
IBM has helped in translating the tremendous interest in the technology into products by offering
BlueDrekar**TM
protocol driver its new middleware based on Bluetooth specifications allowing Bluetooth wireless
devices - from phones to household appliances - to reliably communicate with each other.
The BlueDrekar protocol driver can be used with various HCI transport
layers.
IBM's reference implementation of the
HCI UART transport driver
can be downloaded at IBM's developerWorks site under GNU public license.
BlueHoc simulator
BlueHoc is IBMs new Bluetooth offering in the open-source zone. Released under IBM public license
it allows users to evaluate how Bluetooth performs under various ad-hoc networking scenarios. You can download
BlueHoc from the BlueHoc project page .
The key issues addressed by the simulator are:
- Device Discovery performance of Bluetooth.
- Connection Establishment and QoS negotiation.
- Medium access control scheduling schemes.
- Radio characteristics of Bluetooth system.
- Statistical modeling of the indoor wireless channel.
- Performance of TCP/IP based applications over Bluetooth.
Bluetooth operates in the license free 2.4 GHz ISM band. The Bluetooth
physical channel is defined
by a sequence of hopping frequencies to which the devices of a single network,
piconet, are 'tuned' to. Devices in the same piconet share this channel on a time division basis.
BlueHoc provides an accurate simulation of the basic features of Bluetooth baseband like frequency hopping,
device discovery and channel control.
The following Bluetooth layers have been simulated:
- Bluetooth radio.
- Bluetooth baseband.
- Link Manager Protocol.
- Logical Link Control and Adapatation Protocol (L2CAP).
BlueHoc is based on the open source simulator Network simulator(ns) and
provides a Bluetooth extension to ns.
BlueHoc uses the TCP/IP simulations of network simulator to provide a complete simulation model
for Bluetooth performance evaluation. It also provides a simulation platform for testing performance of various
routing and service disovery protocols over ad-hoc networks.
Though the simulation model of BlueHoc closely approximates Bluetooth protocols, it can be used as a platform
to evaluate performance of proposed improvements to the technology. BlueHoc project is open to contributions
in the form of ideas or new modules for future releases. The mailing list bluehoc-discussion will serve
the purpose of starting a discussion group on Bluetooth and other wireless technologies. You can subscribe to the mailing list on the project page.
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BlueHoc is supported by India Research Lab
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