Development and Evaluation of a Dynamic Bluetooth Network Formation Procedure

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Development and Evaluation of a Dynamic
Bluetooth Network Formation Procedure
Márk Félegyházi, György MiklósEricsson
Research, Hungarymark_at_sch.bme.hu
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Overview

• Bluetooth wireless technology
• Network formation in Bluetooth
• Suggested methods
• two methods for network building
• network topology optimization
• Simulation results
• Conclusion

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Bluetooth wireless technology (1)
Internet

• short-range radio technology
• cable replacement
• universal interface

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Bluetooth wireless technology (2)

• master-slave relationship between nodes
• Frequency Hopping (FH)
• Time Division Duplex (TDD) communication

master
slave
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Bluetooth network
piconet
scatternet
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Bluetooth scatternet formation
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Problem formulation

• Connection setup phase
• neighbour discovery
• physical connection setup
• Scatternet building and maintenance
• Scatternet optimization

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Alive Broadcasting Scatternet Building method
(ABSB)
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Routing Based Scatternet Building method (RBSB)
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Traffic Dependent Scatternet Optimization (TDSO)
master-slave switch
simple piconet
connection teardown
connection setup
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Ad hoc module in PLASMA
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Dynamic scatternet formation with the ABSB method
throughput (kbit/s)
(b)
(a)
(d)
(c)
(f)
(e)
time (s)
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Simulation results of the scatternet optimization
throughput bit/s
throughput bit/s
time s
time s
Texecution 1 s
Texecution 4 s
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Conclusion

• Bluetooth Scatternet Building
• two methods (ABSB and RBSB)
• simple methods
• distributed algorithms
• periodic messaging (robust against packet loss)
• Bluetooth Scatternet Optimization (TDSO)
• distributed algorithm
• decisions according to local measured traffic
• Simulation results
• scatternet building
• fully-connected network building and maintenance
• scatternet optimization
• increases network capacity by reconfiguring the
  topology

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Future work

• Implementation of the routing based scatternet
  building method
• Performance evaluation of the alive based
  scatternet building method
• Measurements with the tuning of the parameters in
  the scatternet optimization method
• Test both scatternet building and optimization
  procedure together