Bluetooth Connection Establishment Process

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Bluetooth Connection Establishment Process

• Semester Presentation

Miki Asa Gur Hildesheim Instructor Ronen Kofman
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Project Goals

• Study the environment of Opnet and its
  functionality and capabilities.
• Study the bluetooth principles.
• Build the simulation environment.
• Prove credibility of the simulation.
• check suggested algorithms.

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Connection Establishment

• Inquiry
• The master is looking for a slave
• The slave provides the master information about
  his clock and ID (BD_ADDR)

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Connection Establishment (cont)

• Page
• The slave listens on certain frequencies (hop
  sequence) based on his ID.
• The master is looking for the slave according to
  the information achieved in the Inquiry
  procedure.
• How?

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Opnet Modeler

• A convenient tool for network modeling
• Subnet
• The units in the net.
• Node
• The layers model.
• Process
• Implementation of each layer.

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Our Project

• Modeling of the BT connection establishment
• Precise
• Easy to change
• Easy to use

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The subnet

• The masters are looking for slaves

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The node model

• The algorithm decides to which mode to enter.
• The bt_modes implement the algorithm request.
• The receiver and transmitter deal with the radio
  packets from/to bt_modes.

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The process model

• Each red state represent real state in the BT
• Switching states by interrupts.
• We can switch from/to Page, Page scan, Standby by
  packets from the algorithm.

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The process model (cont)
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Page

• Page init
• Page action
• Page
• Page response

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Page scan

• Ps init
• Ps action
• Page scan
• Ps response

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Validation

• The algorithm determines the variables for the
  unit.
• Once all these variables determined the time to
  connection is determined as well
• Tests
• Different awakens time.
• Different offset.
• Estimated offset
• SR mode

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Examples

• Slaves mode R0
• All number are in slots

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Future work (for next semester)

• Simulate Inquiry and Inquiry scan
• Check different algorithms to increase
  performance
• Searching time on each mode
• best behavior for a neutral unit
• Who should seek for new units

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Work schedule

• December 2003 simulating inquiry,inquiry scan.
• January, February 2004investigating different
  algorithms.
• March 2004 formulating results and conclusions.