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IEEE P802.15 Working Group for Wireless Personal Area Networks TM

IEEE P802.15 Working Group for Wireless Personal Area Networks TM. Presentation at In-Stat Forum on “Access To Intelligence” Phoenix AZ May 1, 2001. Bluetooth and IEEE 802.11b Coexistence. Stephen J. Shellhammer Chairman IEEE 802.15.2 Coexistence Task Group

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IEEE P802.15 Working Group for Wireless Personal Area Networks TM

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  1. IEEE P802.15 Working Group for Wireless Personal Area NetworksTM Presentation at In-Stat Forum on “Access To Intelligence” Phoenix AZ May 1, 2001 Steve Shellhammer, Symbol Technologies

  2. Bluetooth and IEEE 802.11b Coexistence Stephen J. Shellhammer Chairman IEEE 802.15.2 Coexistence Task Group Senior Director, Symbol Technologies, Inc. Steve Shellhammer, Symbol Technologies

  3. Mutual Interference • Problem: Both IEEE 802.11 and Bluetooth operate in the same 2.4 GHz ISM Band. • Problem: Bluetooth enabled devices will likely be portable and will need to operate in an IEEE 802.11 WLAN environment. • Problem: There will be some level of mutual interference. Steve Shellhammer, Symbol Technologies

  4. IEEE 802.15.2 Deliverables • Coexistence Model • Quantify the effect of the mutual interference of WLAN (e.g. 802.11) and WPAN (e.g. Bluetooth) upon one another. • Coexistence Mechanisms • Mechanisms or techniques to facilitate coexistence of WLAN and WPAN devices. • Both to be documented in an IEEE Recommended Practice Steve Shellhammer, Symbol Technologies

  5. Coexistence Model • The purpose of this Coexistence Model is: • To quantify the effect of the mutual interference under various scenarios. • WLAN in Laptop and Bluetooth in nearby PDA • WLAN and Bluetooth in the same Laptop • To demonstrate the effectiveness of the adopted Coexistence Mechanism. Steve Shellhammer, Symbol Technologies

  6. Coexistence Model • The Coexistence Model consist of four sections, • Physical Layer Models of the 802.11 and Bluetooth Radios • MAC Layer Models of both 802.11 and Bluetooth • RF Channel Model of the Radio Channel • Data Traffic Models of the traffic over both 802.11 and Bluetooth networks. Steve Shellhammer, Symbol Technologies

  7. Coexistence Model • Input to the Model • Location of 802.11 and Bluetooth devices • Type of Data Traffic flowing over both the 802.11 and Bluetooth networks. • Output of the Model • Network Throughput, for both 802.11 and Bluetooth. • Network Latency, for both 802.11 and Bluetooth. • Packet Error rate for voice link Steve Shellhammer, Symbol Technologies

  8. Coexistence Model - Bluetooth SCO Link in the Presence of IEEE 802.11b Steve Shellhammer, Symbol Technologies

  9. Coexistence Model - IEEE 802.11b (11Mbps) in the Presence of Bluetooth Steve Shellhammer, Symbol Technologies

  10. Coexistence Mechanisms • Coexistence Mechanisms Facilitate Coexistence of WPAN & WLAN devices • Submissions were given at, • November 2000 meeting • January 2001 meeting • March 2001 meeting • Updated submissions • Voted on selection of mechanisms Steve Shellhammer, Symbol Technologies

  11. Coexistence Mechanisms • Collaborative Mechanisms • Some form of communication exists between the WLAN and WPAN. • Use this link to provide fair sharing of medium (i.e. air waves) • Non-Collaborative Mechanisms • No communication between WLAN and WPAN exists. • Techniques to minimize the effects of the mutual interference Steve Shellhammer, Symbol Technologies

  12. Coexistence Mechanisms • Collaborative Mechanism (Only one) • Selected a joint proposal from Mobilian, Symbol Technologies, and NIST. • Primarily a Coordinated Scheduling Mechanism. Steve Shellhammer, Symbol Technologies

  13. Coexistence Mechanisms • Non-Collaborative (Multiple) • Selected Bluetooth Packet Selection and Scheduling • Selected IEEE 802.11b Transmit Power Control and Data Rate Scaling • Considering Bluetooth Adaptive Frequency Hopping (More working being done by Ad Hoc committee) Steve Shellhammer, Symbol Technologies

  14. IEEE 802.15 Web Site • For more information see the IEEE 802.15 web site • www.ieee802.org/15/ Steve Shellhammer, Symbol Technologies

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