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documentation: Update the explanation of third.cc in tutorial

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This commit is contained in:
Mohit P. Tahiliani
2017-03-19 07:54:50 -07:00
parent b33d81582d
commit e21f50cb78
1 changed files with 9 additions and 10 deletions
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19
doc/tutorial/source/building-topologies.rst
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@@ -959,14 +959,14 @@ wireless medium and can communication and interfere:
phy.SetChannel (channel.Create ());
Once the PHY helper is configured, we can focus on the MAC layer. Here we choose to
work with non-Qos MACs so we use a NqosWifiMacHelper object to set MAC parameters.
work with non-Qos MACs. WifiMacHelper object is used to set MAC parameters.
::
WifiHelper wifi = WifiHelper::Default ();
WifiHelper wifi;
wifi.SetRemoteStationManager ("ns3::AarfWifiManager");
NqosWifiMacHelper mac = NqosWifiMacHelper::Default ();
WifiMacHelper mac;
The ``SetRemoteStationManager`` method tells the helper the type of
rate control algorithm to use. Here, it is asking the helper to use the AARF
@@ -986,9 +986,8 @@ This code first creates an 802.11 service set identifier (SSID) object
that will be used to set the value of the "Ssid" ``Attribute`` of
the MAC layer implementation. The particular kind of MAC layer that
will be created by the helper is specified by ``Attribute`` as
being of the "ns3::StaWifiMac" type. The use of
``NqosWifiMacHelper`` will ensure that the "QosSupported"
``Attribute`` for created MAC objects is set false. The combination
being of the "ns3::StaWifiMac" type. "QosSupported" ``Attribute`` is
set to false by default for ``WifiMacHelper`` objects. The combination
of these two configurations means that the MAC instance next created
will be a non-QoS non-AP station (STA) in an infrastructure BSS (i.e.,
a BSS with an AP). Finally, the "ActiveProbing" ``Attribute`` is
@@ -1006,7 +1005,7 @@ create the wifi devices of these stations:
We have configured Wifi for all of our STA nodes, and now we need to
configure the AP (access point) node. We begin this process by changing
the default ``Attributes`` of the ``NqosWifiMacHelper`` to reflect the
the default ``Attributes`` of the ``WifiMacHelper`` to reflect the
requirements of the AP.
::
@@ -1014,10 +1013,10 @@ requirements of the AP.
mac.SetType ("ns3::ApWifiMac",
"Ssid", SsidValue (ssid));
In this case, the ``NqosWifiMacHelper`` is going to create MAC
In this case, the ``WifiMacHelper`` is going to create MAC
layers of the "ns3::ApWifiMac", the latter specifying that a MAC
instance configured as an AP should be created, with the helper type
implying that the "QosSupported" ``Attribute`` should be set to
instance configured as an AP should be created. We do not change
the default setting of "QosSupported" ``Attribute``, so it remains
false - disabling 802.11e/WMM-style QoS support at created APs.
The next lines create the single AP which shares the same set of PHY-level