Changes between Version 17 and Version 18 of 802.11/app_notes/FDD-NoMAC


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Timestamp:
Feb 15, 2017, 12:16:54 PM (7 years ago)
Author:
chunter
Comment:

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  • 802.11/app_notes/FDD-NoMAC

    v17 v18  
    386386[[Image(Two_Node_Througput_vs_Time.png, width=600)]]
    387387
    388 Recall from [wiki:802.11/wlan_exp/examples/txrx_log_capture the Dual-Node Log Capture Example] that the traffic pattern starts off with a constant bit rate LTG flow from AP to STA. In the middle third of the experiment, anotehr constant bit rate LTG flow from STA to AP is enabled. Normally with the DCF, this second flow [wiki:802.11/wlan_exp/examples/txrx_log_analysis#LogProcessThroughputvsTime splits the total available sum throughput roughly evenly between the two nodes] while the overall sum throughput slightly decreases due to unavoidable wireless collisions. With the FDD design, however, we can see that the presence of the second flow has no impact on the original flow and the sum throughput doubles.
     388Recall from [wiki:802.11/wlan_exp/examples/txrx_log_capture the Dual-Node Log Capture Example] that the traffic pattern starts off with a constant bit rate LTG flow from AP to STA. In the middle third of the experiment, another constant bit rate LTG flow from STA to AP is enabled. Normally with the DCF, this second flow [wiki:802.11/wlan_exp/examples/txrx_log_analysis#LogProcessThroughputvsTime splits the total available sum throughput roughly evenly between the two nodes] while the overall sum throughput slightly decreases due to unavoidable wireless collisions. With the FDD design, however, we can see that the presence of the second flow has no impact on the original flow and the sum throughput doubles.
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