ROUTING IN BLUETOOTH SCATTERNET

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ROUTING IN BLUETOOTH SCATTERNET

• Supervisor Mr. Gil Zussman.
• Hadar Vorenshtein
• Amit Balderman

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Project Goals

• Establish physical BT scatternet.
• Implement a routing algorithm.

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Overview

• Bluetooth
• BT is a short range radio-technology using a
  frequency hopping scheme in the ISM band.
• Originally developed as a cable replacement
  technology ,enabling people and machines to
  interact at short range. And hence can be used to
  form a close range wireless network (Personal
  Area Network).

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Overview(cont.)

• PAN(Personal Area Network)
• We will divide it into a Piconet and a Scatternet
• Piconet
• Is a collection of up to seven slave devices
  operating together with one common master.
• All devices on the piconet follow the
  frequency hopping sequence and timing of the
  master.

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Overview- Piconets (cont.)

• There is no direct transmission between slaves in
  a piconet ,only from master to slave and
  viceversa.

slave 3
slave 1
master
slave 2
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Overview- Scatternets

• Is an extension of the piconet, realized by
  linking several piconets together.
• Some devices are members of more than one piconet
  acting as slaves in more than one piconet,but can
  act as a master only in one piconet.

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Scatternets(cont.)

• Two Piconets joined together to form a
  scatternet. With a shared slave acting as relay
  between the piconets.

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Towards the Goal

• Interface with an Ericsson BT unit using the
  BlueZ stack in a Linux environment.
• Create communication between two Ericsson BT
  units in order to understand better the BlueZ and
  BT operation.

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Towards the Goal(cont.)

• Create communication between two Digianswer BT
  units and ,again,understand their operation.
• Create communication between a Digianswer BT unit
  and an Ericsson BT unit.

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Towards the Goal(cont.)

• Establish a static piconet with the Digianswer
  units as masters.
• Establish a scatternet and thus choosing and
  implementing a routing algorithm.

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Block Diagram

Routing Algorithm.
C Application.
C interface to stack.
BlueZ stack.
Ericsson Digianswer.
Bluetooth Hardware.
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Schedule
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Schedule(cont.)