19#include "ns3/ht-capabilities.h"
20#include "ns3/ht-frame-exchange-manager.h"
22#include "ns3/packet.h"
82 Time availableTime)
const
88 uint8_t tid = peekedItem->GetHeader().GetQosTid();
89 auto recipient = peekedItem->GetOriginal()->GetHeader().GetAddr1();
95 NS_ABORT_MSG_IF(recipient.IsBroadcast(),
"Recipient address is broadcast");
117 peekedItem = queue->PeekByTidAndAddress(tid, recipient, peekedItem->GetOriginal());
121 while (peekedItem && !peekedItem->GetHeader().IsQosAmsdu() &&
122 m_htFem->TryAggregateMsdu(peekedItem =
m_htFem->CreateAliasIfNeeded(peekedItem),
127 "Found item with sequence number assignment after one without: perhaps "
128 "sequence numbers were not released correctly?");
131 peekedItem = queue->PeekByTidAndAddress(tid, recipient, msdu);
132 queue->DequeueIfQueued({amsdu});
134 amsdu->Aggregate(msdu);
135 queue->Replace(msdu, amsdu);
142 NS_LOG_DEBUG(
"Aggregation failed (could not aggregate at least two MSDUs)");
147 return m_htFem->CreateAliasIfNeeded(amsdu);
153 return (4 - (amsduSize % 4)) % 4;
166 uint16_t maxAmsduSize =
m_mac->GetMaxAmsduSize(ac);
168 if (maxAmsduSize == 0)
170 NS_LOG_DEBUG(
"A-MSDU Aggregation is disabled on this station for AC " << ac);
178 auto ehtCapabilities = stationManager->GetStationEhtCapabilities(recipient);
179 auto he6GhzCapabilities = stationManager->GetStationHe6GhzCapabilities(recipient);
180 auto vhtCapabilities = stationManager->GetStationVhtCapabilities(recipient);
181 auto htCapabilities = stationManager->GetStationHtCapabilities(recipient);
187 uint16_t maxMpduSize = 0;
190 maxMpduSize = ehtCapabilities->GetMaxMpduLength();
194 maxMpduSize = he6GhzCapabilities->GetMaxMpduLength();
198 maxMpduSize = vhtCapabilities->GetMaxMpduLength();
201 if (!htCapabilities && !he6GhzCapabilities)
207 NS_LOG_DEBUG(
"A-MSDU Aggregation disabled because the recipient did not"
208 " send an HT Capabilities element");
219 maxAmsduSize = std::min(maxAmsduSize,
static_cast<uint16_t
>(maxMpduSize - 56));
230 maxAmsduSize = std::min(maxAmsduSize, htCapabilities->GetMaxAmsduLength());
235 maxAmsduSize = std::min(maxAmsduSize,
static_cast<uint16_t
>(maxMpduSize - 56));
244 maxAmsduSize = std::min(maxAmsduSize,
static_cast<uint16_t
>(maxMpduSize - 56));
251 maxAmsduSize = std::min(maxAmsduSize, htCapabilities->GetMaxAmsduLength());
257 maxAmsduSize = std::min(maxAmsduSize,
static_cast<uint16_t
>(3839));
271 uint32_t maxSize = aggregatedPacket->GetSize();
272 uint16_t extractedLength;
276 while (deserialized < maxSize)
278 deserialized += aggregatedPacket->RemoveHeader(hdr);
280 extractedMsdu = aggregatedPacket->CreateFragment(0,
static_cast<uint32_t>(extractedLength));
281 aggregatedPacket->RemoveAtStart(extractedLength);
282 deserialized += extractedLength;
284 padding = (4 - ((extractedLength + 14) % 4)) % 4;
286 if (padding > 0 && deserialized < maxSize)
288 aggregatedPacket->RemoveAtStart(padding);
289 deserialized += padding;
293 set.push_back(packetHdr);
295 NS_LOG_INFO(
"Deaggreated A-MSDU: extracted " << set.size() <<
" MSDUs");
Aggregator used to construct A-MSDUs.
static TypeId GetTypeId()
Get the type ID.
uint16_t GetMaxAmsduSize(Mac48Address recipient, uint8_t tid, WifiModulationClass modulation) const
Determine the maximum size for an A-MSDU of the given TID that can be sent to the given receiver when...
void DoDispose() override
Destructor implementation.
Ptr< WifiMac > m_mac
the MAC of this station
uint8_t m_linkId
ID of the link this object is connected to.
static WifiMpdu::DeaggregatedMsdus Deaggregate(Ptr< Packet > aggregatedPacket)
Ptr< HtFrameExchangeManager > m_htFem
the HT Frame Exchange Manager of this station
static uint16_t GetSizeIfAggregated(uint16_t msduSize, uint16_t amsduSize)
Compute the size of the A-MSDU resulting from the aggregation of an MSDU of size msduSize and an A-MS...
Ptr< WifiMpdu > GetNextAmsdu(Ptr< WifiMpdu > peekedItem, WifiTxParameters &txParams, Time availableTime) const
Attempt to aggregate other MSDUs to the given A-MSDU while meeting the following constraints:
void SetWifiMac(const Ptr< WifiMac > mac)
Set the MAC layer to use.
static uint8_t CalculatePadding(uint16_t amsduSize)
Calculate how much padding must be added to the end of an A-MSDU of the given size if a new MSDU is a...
void SetLinkId(uint8_t linkId)
Set the ID of the link this MSDU aggregator is associated with.
A base class which provides memory management and object aggregation.
virtual void DoDispose()
Destructor implementation.
Smart pointer class similar to boost::intrusive_ptr.
Simulation virtual time values and global simulation resolution.
a unique identifier for an interface.
TypeId SetParent(TypeId tid)
Set the parent TypeId.
std::list< std::pair< Ptr< const Packet >, AmsduSubframeHeader > > DeaggregatedMsdus
DeaggregatedMsdus typedef.
This class stores the TX parameters (TX vector, protection mechanism, acknowledgment mechanism,...
WifiTxVector m_txVector
TXVECTOR of the frame being prepared.
WifiModulationClass GetModulationClass() const
Get the modulation class specified by this TXVECTOR.
#define NS_ASSERT(condition)
At runtime, in debugging builds, if this condition is not true, the program prints the source file,...
#define NS_ASSERT_MSG(condition, message)
At runtime, in debugging builds, if this condition is not true, the program prints the message to out...
#define NS_ABORT_MSG_IF(cond, msg)
Abnormal program termination if a condition is true, with a message.
#define NS_LOG_COMPONENT_DEFINE(name)
Define a Log component with a specific name.
#define NS_LOG_DEBUG(msg)
Use NS_LOG to output a message of level LOG_DEBUG.
#define NS_LOG_FUNCTION_NOARGS()
Output the name of the function.
#define NS_LOG_FUNCTION(parameters)
If log level LOG_FUNCTION is enabled, this macro will output all input parameters separated by ",...
#define NS_LOG_INFO(msg)
Use NS_LOG to output a message of level LOG_INFO.
#define NS_OBJECT_ENSURE_REGISTERED(type)
Register an Object subclass with the TypeId system.
Ptr< T > Create(Ts &&... args)
Create class instances by constructors with varying numbers of arguments and return them by Ptr.
AcIndex QosUtilsMapTidToAc(uint8_t tid)
Maps TID (Traffic ID) to Access classes.
WifiModulationClass
This enumeration defines the modulation classes per (Table 10-6 "Modulation classes"; IEEE 802....
AcIndex
This enumeration defines the Access Categories as an enumeration with values corresponding to the AC ...
@ WIFI_PHY_BAND_2_4GHZ
The 2.4 GHz band.
@ WIFI_MOD_CLASS_HT
HT (Clause 19)
@ WIFI_MOD_CLASS_EHT
EHT (Clause 36)
@ WIFI_MOD_CLASS_VHT
VHT (Clause 22)
@ WIFI_MOD_CLASS_HE
HE (Clause 27)
Every class exported by the ns3 library is enclosed in the ns3 namespace.
Ptr< T1 > DynamicCast(const Ptr< T2 > &p)
Cast a Ptr.