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Coexistence of Wi-Fi and Bluetooth: Addressing Interference in ISM Band Communication

This presentation by Jagadish Kumar Guttikonda delves into the coexistence of Wi-Fi (802.11b) and Bluetooth technologies, both operating in the ISM band. It explores previous analyses of interference between these wireless protocols, detailing the physical (PHY) and medium access control (MAC) layers. The presentation includes measurements of interference, simulation results, and examination of effective techniques to reduce conflicts. It aims to provide technical solutions for enhancing simultaneous operation, based on regulatory standards and practices.

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Coexistence of Wi-Fi and Bluetooth: Addressing Interference in ISM Band Communication

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  1. PRESENTATION ON“WI-FI (802.11b) AND BLUETOOTH:ENABLING COEXISTENCE-JIM LANSFORD, ADRIAN STEPHENS AND RON NEVO, MOBILIAN CORPORATION” PRESENTATION BY JAGADISH KUMAR GUTTIKONDA

  2. 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)

  3. PREVIOUS WORK • ANALYSIS OF INTERFERENCE BETWEEN 802.11b AND BLUETOOTH • PHY AND MAC LAYERS

  4. WI-FI AND BLUETOOTH INTERFERENCE BASICS • WI-FI AND BLUETOOTH OVERVIEW • WI-FI AND BLUETOOTH SHARING OF SAME FREQUENCY BAND • SIGNALS AND NOISE

  5. 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 WI-FI AND BLUETOOTH OVERVIEW

  6. WI-FI AND BLUETOOTH: SHARING THE SAME FREQUENCY BAND • ISM BAND • TRANSMISSION METHODS • BLUETOOTH AND WI-FI TRANSMISSION METHODS

  7. 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

  8. TYPICAL TRANSMIT MASK

  9. 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

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

  11. MEASUREMENT ENVIRONMENT • CONFIGURATION • GANYMEDE CHARIOT

  12. MEASUREMENT RESULTS • WI-FI THROUGH PUT WITH BLUETOOTH ACTIVITY

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

  14. SIMULATION OVERVIEW • SIMILAR TO NIST MODEL DESCRIBED BY GOLMIE • TYPICAL SCENARIO

  15. SCENARIO SETUP AND CALIBRATION • CALIBRATING THE SIMULATION DATA TO THE MEASURED DATA • EMPIRICAL MODEL

  16. SIMULATION SCENARIOS • IMPACT OF VARIOUS KEY PARAMETERS • BLUETOOTH AND WI-FI ACTIVITY

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

  18. SIMULATION RESULTS

  19. INTERFERENCE REDUCTION TECHNIQUES • COEXISTENCE PROBLEM • TECHNIQUES • REGULATORY AND STANDARDS • USAGE AND PRACTICES • TECHNICAL APPROACHES • ALTERNATE FREQUENCY BANDS

  20. 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.

  21. WWW.MOBILIAN.COM WWW.TI.COM WWW.ETSI.ORG THANK YOU REFERENCES

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