doc.: IEEE /0028r0 Submission July 2006 Steve Shellhammer, QualcommSlide 1 Coexistence Scenario – A Pair of Unlicensed Wireless Networks Notice: This document has been prepared to assist IEEE It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEEs name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEEs sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures, including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the TAG of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE TAG. If you have questions, contact the IEEE Patent Committee Administrator at. Date: Authors:

doc.: IEEE /0028r0 Submission July 2006 Steve Shellhammer, QualcommSlide 2 Coexistence Scenario Description Title – A Pair of Unlicensed Wireless Networks A pair of frequency static unlicensed wireless networks operating co-channel (or adjacent channel) –This covers many of our coexistence scenarios we have considered up to this point in time –Often a WLAN and a WPAN, though also applies to WMAN and WRAN –Both networks are unlicensed –Neither network is frequency hopping –Neither network is adapting to the other network (e.g. DFS or CCA)

doc.: IEEE /0028r0 Submission July 2006 Steve Shellhammer, QualcommSlide 3 PHY Characteristics Operating Frequency Bandwidth TX power Antenna gain Supported Data Rates (Modulation and Coding) Receiver operating characteristics (ROC) curves (for each data rate)

doc.: IEEE /0028r0 Submission July 2006 Steve Shellhammer, QualcommSlide 4 MAC Characteristics MAC Frame Traffic Statistics –Typical MAC Frame duration (Bytes). Could be a distribution of Frame sizes –Typical time between frames

doc.: IEEE /0028r0 Submission July 2006 Steve Shellhammer, QualcommSlide 5 Other Parameters Geometric location of nodes for both of the unlicensed wireless networks Path loss model Possibly other channel model characteristics –Shadow fading –Multipath fading

doc.: IEEE /0028r0 Submission July 2006 Steve Shellhammer, QualcommSlide 6 Typical Coexistence Metrics Packet Error Rate (PER) Throughput Latency These metrics are typically evaluated in one of several ways –With and without interference –As a function of distance between nodes in the two networks

doc.: IEEE /0028r0 Submission July 2006 Steve Shellhammer, QualcommSlide 7 Conclusion The coexistence scenario is frequently used in IEEE 802 Gives a good indication of coexistence when both networks operate without adapting to the presence of the other network Also a good scenario when the two networks operate co-channel due to unavailability of other channels