Department of Communications Engineering
Test Bench Development for IEEE
802.11-based WLAN Performance
Evaluation and Measurements
Vitaly Petrov, MSc student
Department of Communications Engineering
Tampere University of Technology
Department of Communications Engineering
Problem topicality
2IEEE 802.11-based WLAN Performance Evaluation
802.11 (Wi-Fi) – de-facto standard for WLAN
Need for real performance evaluation
0
100
200
300
400
500
Generation
Declared
Achievable
Throughput, Mbit/s
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Mess of approaches
3IEEE 802.11-based WLAN Performance Evaluation
Measurements
SimulationAnalysis
Harmonization is required
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General use case
4IEEE 802.11-based WLAN Performance Evaluation
Nodes types:
1.Sender
2.Receiver
3.Sender /
Receiver
Infrastructure mode:
1. Widely used
2. Consequentive,
successful
implementations
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Harmonization is proposed
5IEEE 802.11-based WLAN Performance Evaluation
Measurements
Simulation
Analysis
Model
convergence
Best
practices
consideration
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Measurements
IEEE 802.11-based WLAN Performance Evaluation
Metrics:
1. Throughput
2. Packet Error
Trace (PET)
3. Average Delay
4. …
6
Open-source driver is required
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Simulation
7IEEE 802.11-based WLAN Performance Evaluation
Non-analytical models verification
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Analysis. Assumptions
8IEEE 802.11-based WLAN Performance Evaluation
Nodes number - const
Saturation
Every node has a packet ready to
transmit
Transmitting buffer is full
Data is sent by portions
Transmitting power – const
Rate – const
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Analysis.
Performance benchmarking
9IEEE 802.11-based WLAN Performance Evaluation
][32
)/(8)(1
maxmin iAIFSACKDATACTSRTSDIFSSLOTWW
bytebitsMbyteT
Extrapolation approaches
for N nodes exist
Throughput estimation for 2 nodes:
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Analysis. Channel models
10IEEE 802.11-based WLAN Performance Evaluation
Packet Error Trace Gilbert Elliott model
Pg Pb
10001010101101011
00010101010101010
10101000101010101
01110101011010010
000001010101010…
bbgb
bggg
pp
ppP
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Test bench structure
11IEEE 802.11-based WLAN Performance Evaluation
Metrics:
• Throughput
• QoS policy
• RTS/CTS Threshold
• Packet Error Trace
• Rate
• Error probability
• …
Benchmarking loop
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Different network scenarios
12IEEE 802.11-based WLAN Performance Evaluation
Modes:
802.11 g
802.11 n
802.11 ac
802.11 ad
1.
2.
3.
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Conclusions
13IEEE 802.11-based WLAN Performance Evaluation
Approaches harmonization
Performance benchmarking:
Measurements
Simulation
Analysis
Performance assessment
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Thank youWe are open for collaboration!
Thank you!
14IEEE 802.11-based WLAN Performance Evaluation
