wiki:802.11/Benchmarks/Throughput

Version 21 (modified by chunter, 9 years ago) (diff)

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Throughput Benchmarks

Throughput vs. SNR

This test measures the achieved throughput of each PHY rate between two WARP v3 nodes running the 802.11 Reference Design. One node acts as AP, the other as a STA. Traffic is generated locally via the LTG framework; measurements are extracted from the nodes via the experiments framework. The nodes' RF interfaces are connected via a coax cable and a variable attenuator. The attenuation is swept from 55dB to 83dB in 0.5dB steps.

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Observations

  • The performance of each PHY rate over an AWGN link lines up with theoretical predictions [1]. This includes the interesting observation that the 12Mbps rate outperforms the 9Mbps both in terms of achieved throughput as well as error tolerance. Notably, the 9Mbps PHY rate has been removed from 802.11n and beyond.

[1] Goodput analysis and link adaptation for IEEE 802.11a wireless LANs - Daji Qiao; Sunghyun Choi; Shin, K.G.

Throughput vs. Payload Length

This test measures the achieved throughput of each PHY rate between two WARP v3 nodes running the 802.11 Reference Design. One node acts as AP, the other as a STA. Traffic is generated locally via the LTG framework; measurements are extracted from the nodes via the experiments framework. The nodes' RF interfaces are connected via a coax cable and 50dB attenuation.

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Observations

  • The 802.11 Reference Design performance matches the performance predicted by an analysis of the overhead in the 802.11 MAC and PHY [2].

[2] Throughput and delay limits of IEEE 802.11 - Xiao Rosdahl