diff --git a/src/wifi/model/ctrl-headers.cc b/src/wifi/model/ctrl-headers.cc
index e9ff6931e..8e9596ce0 100644
--- a/src/wifi/model/ctrl-headers.cc
+++ b/src/wifi/model/ctrl-headers.cc
@@ -2340,17 +2340,35 @@ CtrlTriggerHeader::SetUlBandwidth(MHz_u bw)
         m_ulBandwidth = 2;
         break;
     case 160:
+    case 320:
         m_ulBandwidth = 3;
         break;
     default:
         NS_FATAL_ERROR("Bandwidth value not allowed.");
         break;
     }
+    if (bw > MHz_u{160})
+    {
+        NS_ASSERT(m_specialUserInfoField);
+    }
+    if (m_specialUserInfoField)
+    {
+        NS_ASSERT(m_variant == TriggerFrameVariant::EHT);
+        m_specialUserInfoField->SetUlBwExt(bw);
+    }
 }
 
 MHz_u
 CtrlTriggerHeader::GetUlBandwidth() const
 {
+    if (m_specialUserInfoField)
+    {
+        NS_ASSERT(m_variant == TriggerFrameVariant::EHT);
+        if (m_specialUserInfoField->GetUlBwExt() > 1)
+        {
+            return MHz_u{320};
+        }
+    }
     return (1 << m_ulBandwidth) * MHz_u{20};
 }
 
diff --git a/src/wifi/model/ctrl-headers.h b/src/wifi/model/ctrl-headers.h
index 9a4628342..475e77765 100644
--- a/src/wifi/model/ctrl-headers.h
+++ b/src/wifi/model/ctrl-headers.h
@@ -1218,15 +1218,15 @@ class CtrlTriggerHeader : public Header
      */
     bool GetCsRequired() const;
     /**
-     * Set the bandwidth of the solicited HE TB PPDU.
+     * Set the bandwidth of the solicited HE/EHT TB PPDU.
      *
-     * @param bw bandwidth (allowed values: 20, 40, 80, 160)
+     * @param bw bandwidth (allowed values: 20, 40, 80, 160, 320)
      */
     void SetUlBandwidth(MHz_u bw);
     /**
-     * Get the bandwidth of the solicited HE TB PPDU.
+     * Get the bandwidth of the solicited HE/EHT TB PPDU.
      *
-     * @return the bandwidth (20, 40, 80 or 160)
+     * @return the bandwidth (20, 40, 80, 160 or 320)
      */
     MHz_u GetUlBandwidth() const;
     /**
@@ -1241,15 +1241,15 @@ class CtrlTriggerHeader : public Header
      */
     void SetGiAndLtfType(Time guardInterval, uint8_t ltfType);
     /**
-     * Get the guard interval duration of the solicited HE TB PPDU.
+     * Get the guard interval duration of the solicited HE/EHT TB PPDU.
      *
-     * @return the guard interval duration  of the solicited HE TB PPDU
+     * @return the guard interval duration of the solicited HE/EHT TB PPDU
      */
     Time GetGuardInterval() const;
     /**
-     * Get the LTF type of the solicited HE TB PPDU.
+     * Get the LTF type of the solicited HE/EHT TB PPDU.
      *
-     * @return the LTF type of the solicited HE TB PPDU
+     * @return the LTF type of the solicited HE/EHT TB PPDU
      */
     uint8_t GetLtfType() const;
     /**