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Development and Evaluation of a Dynamic Bluetooth Network Formation Procedure. Budapest University of Technology and Economics. Márk Félegyházi graduated student. Overview. Bluetooth wireless technology Network formation in Bluetooth Suggested methods two methods for network building

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development and evaluation of a dynamic bluetooth network formation procedure

Development and Evaluation of a Dynamic Bluetooth Network Formation Procedure

Budapest University of Technology and Economics

Márk Félegyházigraduated student

overview
Overview
  • Bluetooth wireless technology
  • Network formation in Bluetooth
  • Suggested methods
    • two methods for network building
    • network topology optimization
  • Simulation results
  • Conclusion
bluetooth wireless technology 1
Bluetooth wireless technology (1)

Internet

  • short-range radio technology
  • cable replacement
  • universal interface
bluetooth wireless technology 2
Bluetooth wireless technology (2)

master

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

slave

bluetooth network
Bluetooth network

piconet

scatternet

problem formulation
Problem formulation
  • Connection setup phase
    • neighbour discovery
    • physical connection setup
  • Scatternet building and maintenance
  • Scatternet optimization
alive broadcasting scatternet building method absb
C

C

D

D

C

D

B

B

E

E

B

E

F

F

A

A

F

A

connection

breakdown

Fully-connected

network

sending Alive

messages (limit=3)

Alive Broadcasting Scatternet Building method (ABSB)
traffic dependent scatternet optimization tdso
C

C

B

B

A

A

C

C

B

A

B

A

Traffic Dependent Scatternet Optimization (TDSO)

master-slave

switch

simple piconet

connection

teardown

connection

setup

dynamic scatternet formation with the absb method
Dynamic scatternet formation with the ABSB method

throughput (kbit/s)

(b)

(a)

(d)

(c)

(f)

(e)

time (s)

simulation results of the scatternet optimization
Simulation results of the scatternet optimization

throughput [bit/s]

throughput [bit/s]

time [s]

time [s]

Texecution = 1 s

Texecution = 4 s

conclusion
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
future work
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
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