• Peak UDP and TCP throughput 802.11ac and 802.11n
Peak UDP and TCP throughput 802.11ac and 802.11n

Open NetSim, Select Examples ->Internetworks-> Wi-Fi -> Peak UDP and TCP throughput 802.11ac and 802.11n then click on the tile in the middle panel to load the example as shown in below Figure

Figure4-25

The following network diagram illustrates, what the NetSim UI displays when you open the example configuration file as shown in below Figure.

Figure4-26

IEEE802.11n#

Network Settings

  1. Set the following property as shown in below given Table

    Interface Parameters
    Standard IEEE802.11n
    No. of Frames to aggregate 64
    Standard Channel 1_2412 MHz
    Rate Adaptation False
    Short Retry Limit 7
    Long Retry Limit 4
    Dott11_RTSThreshold 3000bytes
    Medium Access Protocol DCF
    Buffer Size 1MB
    Guard Interval 400ns
    Bandwidth 40 MHz
    Frequency Band 2.4 GHz
    Transmitter Power 100mW
    Antenna Gain 0
    Antenna height 1m
    Reference distance (d0) 1m
    Transmitting Antennas 4
    Receiving Antennas 4

  2. Set wired link properties as shown below.

    • Uplink speed and Downlink speed (Mbps)- 1000 Mbps.
    • Uplink BER and Downlink BER – 0.
    • Uplink and Downlink Propagation Delay(µs) – 10.

  3. The Channel Characteristics were set as No pathloss in wireless link properties.

  4. Set Downlink application source node as Wired Node destination node as Wireless Node.

    Application Properties
    App1_CBR
    Packet Size (Byte) 1450
    Inter Arrival Time (µs) 11.6
    Transport Protocol UDP

  5. Plots are enabled in NetSim GUI.

  6. Run simulation for 10 sec. After simulation completes go to metrics window and note down throughput value from application metrics.

Go Back to 802.11n UDP Scenario and Change Transport protocol to TCP, Window scaling is set to True and Scale shift count set to 5 in the transport layer of Wired node and Wireless node for the other sample (i,e 802.11n TCP), run the simulation for 10 sec and note down throughput value from application metrics

Results and Discussion#

Transport Protocol Throughput (Mbps)
UDP 443.61
TCP 356.81

Plot#

Figure4-27

IEEE802.11ac#

Network Settings

  1. Set the following property as shown in below given table:

    Interface Parameters
    Standard IEEE802.11ac
    No. of Frames to aggregated 64
    Standard Channel 36 (5180MHz)
    Rate Adaptation False
    Short Retry Limit 7
    Long Retry Limit 4
    Dott11_RTSThreshold 3000bytes
    Medium Access Protocol DCF
    Buffer Size 1MB
    Guard Interval 400ns
    Bandwidth 160 MHz
    Frequency Band 5 GHz
    Transmitter Power 100mW
    Antenna Gain 0
    Antenna height 1m
    Reference distance (d0) 1m
    Transmitting Antennas 8
    Receiving Antennas 8

  2. Set wired link properties as shown in below.

    • Uplink speed and Downlink speed (Mbps)- 10000 Mbps.
    • Uplink BER and Downlink BER – 0.
    • Uplink and Downlink Propagation Delay(µs) – 10.
  3. The Channel Characteristics were set as No pathloss in wireless link properties.

  4. Set Downlink application source node as Wired Node destination node as Wireless Node.

    Application Properties
    App1_CBR
    Packet Size (Byte) 1450
    Inter Arrival Time (µs) 5.84
    Transport Protocol UDP

  5. Plots are enabled in NetSim GUI.

  6. Run simulation for 10 sec. After simulation completes go to metrics window and note down throughput value from application metrics.

Go Back to the 802.11ac UDP Scenario and Change Transport protocol to TCP, Window scaling is set to True and Scale shift count set to 5 in the transport layer of Wired node and Wireless node for the other sample (i,e 802.11ac TCP), run the simulation for 10 sec and note down throughput value from application metrics.

Results and Discussion#

Transport Protocol Throughput (Mbps)
UDP 1697.98
TCP 1104.26

Plot#

Figure4-28