From a493688ed7758ef82da4e696a8e87bbe9a510ea4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Deronne?= <sebastien.deronne@gmail.com>
Date: Sat, 3 Mar 2018 22:34:30 +0100
Subject: [PATCH] wifi: Fix GetChannelWidthForTransmission for 802.11b DSSS

---
 src/wifi/model/wifi-remote-station-manager.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/wifi/model/wifi-remote-station-manager.cc b/src/wifi/model/wifi-remote-station-manager.cc
index 41298edff..61e1841a4 100644
--- a/src/wifi/model/wifi-remote-station-manager.cc
+++ b/src/wifi/model/wifi-remote-station-manager.cc
@@ -827,6 +827,12 @@ WifiRemoteStationManager::GetChannelWidthForTransmission (WifiMode mode, uint8_t
       NS_LOG_LOGIC ("Channel width reduced to 20 MHz");
       return 20;
     }
+  //at 2.4 GHz basic rate can be non-ERP DSSS
+  if (modulationClass == WifiModulationClass::WIFI_MOD_CLASS_DSSS
+      || modulationClass == WifiModulationClass::WIFI_MOD_CLASS_HR_DSSS)
+    {
+      return 22;
+    }
   return maxSupportedChannelWidth;
 }