Changes between Version 2 and Version 3 of 802.11/wlan_exp/app_notes/dcf_with_hidden_nodes


Ignore:
Timestamp:
Jun 23, 2015, 2:05:13 PM (9 years ago)
Author:
chunter
Comment:

--

Legend:

Unmodified
Added
Removed
Modified

  • 802.11/wlan_exp/app_notes/dcf_with_hidden_nodes

    v2 v3  
    22221. [#TxRxLogResults Tx/Rx Log Results]
    23231. [#Resources Source Code]
    24 1. [wiki:./appendix Appendix]
     24
    2525
    2626= Experimental Setup =
    2727
    28 The experiments described below use 3 Mango WARP v3 kits, each running the [wiki:../../../Changelog#a1.3Release 802.11 Reference Design (version v1.3)], including the [wiki:../../../wlan_exp WLAN Experimental Framework].
     28The experiments described below use 3 Mango WARP v3 kits, each running the [wiki:../../../Changelog#a1.3Release 802.11 Reference Design (version v1.3)], including the [wiki:../../../wlan_exp WLAN Experimental Framework]. To construct a hidden node topology, we could space nodes apart from one another and lower transmit powers to induce the effect. However, this is not the easiest set up for repeatability of these experiments. Instead, we can artificially "blind" two stations from one another via RF cabling and sufficient attenuation.
    2929
    30 ||  [[Image(wiki:802.11/wlan_exp/app_notes/dcf_with_multiple_flows/figs:experimental_setup_photo.jpg, width=600)]]  ||
     30||  [[Image(wiki:802.11/wlan_exp/app_notes/dcf_with_hidden_nodes/figs:flow_legend.png, width=400)]]  ||
    3131||  '''Experimental Setup'''  ||
     32
     33The above figure shows the wired topology. STA 1 and the AP are suppressed by 50 dB of external attenuation (plus cable loss and 3 dB loss through the power splitter). The same is true for the link between STA 2 and the AP. The link between STA 1 and STA 2, however, involves 100 dB of external attenuation as well as the tens of dB attenuation after leakage between the two input ports of the power splitter.
     34
     35
    3236
    3337== Experiment Details ==
    … …  
    3842
    3943We use 4 traffic flows in our experiments:
    40  * '''Flow 1:''' Backlogged traffic from STA_1 to AP
    41  * '''Flow 2:''' Backlogged traffic from STA_2 to AP
     44 * '''Flow 1:''' Backlogged traffic from STA 1 to AP
     45 * '''Flow 2:''' Backlogged traffic from STA 2 to AP
    4246
    43  [[Image(wiki:802.11/wlan_exp/app_notes/dcf_with_multiple_flows/figs:experimental_flows.png, width=600)]]
     47
    4448
    4549The colors in the figure above are used throughout this app note to denote each flow.