doc.: 11-03-0617-00-0wng submission - study project proposal wpp – simulating field performance...

Jerry Carr, News IQ Inc. Test Laboratory

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November 2003 doc.: 11-03-0617-00-0wng

Submission - Study Project Proposal WPP – Simulating Field Performance

Wireless Performance Prediction(WPP)

- Simulating Field Performance

Jerry CarrNews IQ Inc. Test Laboratory

(760) [email protected]


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November 2003 doc.: 11-03-0617-00-0wng


Purpose

802.11 End-to-End System Performance Measurement

System


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ScopeMethods for prediction of real installation performance:

Predicting the: •RF coverage (RFC2544 throughput/packet loss)

•Packet throughput (RFC2544)

•Packet latency (RFC1242)

•Packet errors and loss rate (RFC1242)

•Buffer capacity (derived turn-around test)

•Processing performance (back-to-back packet size, RFC1242)

Measurement correlation, precision & repeatability


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Test Platform 1

SR5500


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Test Platform 2

DUT

Client Device or Access Point


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Test Platform 3


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VariablesEffect of:

•Antenna gain and pattern (with the addition of anechoic chamber, position controller, and calibration method)

•Receiver sensitivity (MAC Layer 4)

•Transmit power (radiated PHY Layer 1)

•Protocol/host processing (TCP/IP Layer 3 Network)

•Environmental and system noise (fading and channel noise PHY)

•Band crowding (add generators for adjacent and alternate channel performance PHY)


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November 2003 doc.: 11-03-0617-00-0wng


Benefits

•Predictable wireless experience for consumers.

•More effective and standard evaluation of new designs.

•Enhanced propagation of IEEE 802 standards, due to improved perception of end-user performance.


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November 2003 doc.: 11-03-0617-00-0wng


Conformity with original purpose

• This test platform successfully emulates the real installation environments

• Measures a the summation of a number of complicated and interrelated factors

• End user, device level, test and analysis method that provides a good degree of confidence in predicting coverage and throughput

• Can easily be modified to include radiated performance

doc.: 11-03-0617-00-0wng submission - study project proposal wpp – simulating field performance...

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