PRESENTATION ON

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PRESENTATION ON WI-FI (802.11b) AND
BLUETOOTHENABLING COEXISTENCE-JIM LANSFORD,
ADRIAN STEPHENS AND RON NEVO, MOBILIAN
CORPORATION

• PRESENTATION BY
• JAGADISH KUMAR GUTTIKONDA

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INTRODUCTION

• EMERGING WIRELESS TECHNOLOGIES IN ISM BAND
• WPAN-WIRELESS PERSONAL AREA NETWORKING
• WLAN-WIRELESS LOCAL AREA NETWORKING
• WPAN-LED BY BLUETOOTH
• WLAN-LED BY WI-FI(IEEE-802.11b)

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PREVIOUS WORK

• ANALYSIS OF INTERFERENCE BETWEEN 802.11b AND
  BLUETOOTH
• PHY AND MAC LAYERS

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WI-FI AND BLUETOOTH INTERFERENCE BASICS

• WI-FI AND BLUETOOTH OVERVIEW
• WI-FI AND BLUETOOTH SHARING OF SAME FREQUENCY
  BAND
• SIGNALS AND NOISE

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WI-FI AND BLUETOOTH OVERVIEW

• BLUETOOTH
• RF TECHNOLOGY
• PICONETS
• Synchronous Connection Oriented links
• Asynchronous Connectionless data types
• PHY layer
• Power Level and Data rate

• WI-FI
• Networking
• Data Types
• Access Scheme
• PHY layer
• Power Level

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WI-FI AND BLUETOOTH SHARING THE SAME FREQUENCY
BAND

• ISM BAND
• TRANSMISSION METHODS
• BLUETOOTH AND WI-FI TRANSMISSION METHODS

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SIGNALS AND NOISE

• SIGNAL TO NOISE RATIO (Eb/Nt)
• DEPENDENCE OF COMMUNICATION SYSTEM ON SNR
• NOISE
• IN-BAND NOISE AND OUTBAND NOISE
• WHITE AND COLORED

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TYPICAL TRANSMIT MASK
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BLUETOOTH AND WI-FI INTERFERENCE CASES

• IF BLUETOOTH AND WI-FI OPERATE AT THE SAME TIME
  WITH IN THE SAME FREQUENCY BAND THEY WILL
  INTERFERE WITH EACH OTHER

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INTERFERENCE MEASUREMENTS

• SIMPLE MEASUREMENTS THAT DEMONSTRATE THE
  POTENTIAL MAGNITUDE OF THE INTERFERENCE ISSUE IN
  A USAGE SCENARIO CONSISTENT WITH Sim-OP.

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MEASUREMENT ENVIRONMENT

• CONFIGURATION
• GANYMEDE CHARIOT

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MEASUREMENT RESULTS

• WI-FI THROUGH PUT WITH BLUETOOTH ACTIVITY

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INTERFERENCE SIMULATION

• SIMULATION ENVIRONMENT CREATED USING KNOWLEDGE OF
  THE CHARACTERISTICS OF BLUETOOTH AND WI-FI

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SIMULATION OVERVIEW

• SIMILAR TO NIST MODEL DESCRIBED BY GOLMIE
• TYPICAL SCENARIO

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SCENARIO SETUP AND CALIBRATION

• CALIBRATING THE SIMULATION DATA TO THE MEASURED
  DATA
• EMPIRICAL MODEL

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SIMULATION SCENARIOS

• IMPACT OF VARIOUS KEY PARAMETERS
• BLUETOOTH AND WI-FI ACTIVITY

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SIMULATION RESULTS

• THE IMPACT OF SCO LINKS
• ADDITIONAL PICONETS (OFFICE SCENARIO)
• THE EFFECT OF WI-FI ON BLUETOOTH

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SIMULATION RESULTS
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INTERFERENCE REDUCTION TECHNIQUES

• COEXISTENCE PROBLEM
• TECHNIQUES
• REGULATORY AND STANDARDS
• USAGE AND PRACTICES
• TECHNICAL APPROACHES
• ALTERNATE FREQUENCY BANDS

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CONCLUSION(S)

• COEXISTENCE AND SIMULATANEOUS OPERATION OF WI-FI
  AND BLUETOOTH.
• REDUCTION OF INTERFERENCE USING SYSTEM LEVEL
  APPROACH
• EFFECTIVE SOLUTIONS BY IEEE 802.15.2 AND
  BLUETOOTH SIG AND THEIR MARKET DEPLOYABILITY.

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REFERENCES

• WWW.MOBILIAN.COM
• WWW.TI.COM
• WWW.ETSI.ORG

• THANK YOU