This commit is contained in:
Mathieu Lacage
2008-05-27 15:32:08 -07:00
parent f86b2de0af
commit eaf4fb4a6d

View File

@@ -35,12 +35,9 @@ class NonUnicastWifiRemoteStation;
class WifiPhy;
/**
* \brief hold per-remote-station state.
* \brief hold a list of per-remote-station state.
*
* The state in this class is used to keep track
* of association status if we are in an infrastructure
* network and to perform the selection of tx parameters
* on a per-packet basis.
* \sa ns3::WifiRemoteStation.
*/
class WifiRemoteStationManager : public Object
{
@@ -106,6 +103,14 @@ private:
namespace ns3 {
/**
* \brief hold per-remote-station state.
*
* The state in this class is used to keep track
* of association status if we are in an infrastructure
* network and to perform the selection of tx parameters
* on a per-packet basis.
*/
class WifiRemoteStation {
public:
@@ -114,14 +119,18 @@ public:
WifiRemoteStation ();
virtual ~WifiRemoteStation ();
// Invoked in an AP upon disassociation of a
// specific STA.
/**
* Invoked in an AP upon disassociation of a
* specific STA.
*/
void Reset (void);
// Invoked in a STA or AP to store the set of
// modes supported by a destination which is
// also supported locally.
// The set of supported modes includes
// the BSSBasicRateSet.
/**
* Invoked in a STA or AP to store the set of
* modes supported by a destination which is
* also supported locally.
* The set of supported modes includes
* the BSSBasicRateSet.
*/
void AddSupportedMode (WifiMode mode);
bool IsBrandNew (void) const;
@@ -132,30 +141,121 @@ public:
void RecordGotAssocTxFailed (void);
void RecordDisassociated (void);
/**
* \param packet the packet to queue
* \param fullPacketSize the size of the packet after its 802.11 MAC header has been added.
*
* This method is typically invoked just before queuing a packet for transmission.
* It is a no-op unless the IsLowLatency attribute of the attached ns3::WifiRemoteStationManager
* is set to false, in which case, the tx parameters of the packet are calculated and stored in
* the packet as a tag. These tx parameters are later retrieved from GetDadaMode and GetRtsMode.
*/
void PrepareForQueue (Ptr<const Packet> packet, uint32_t fullPacketSize);
/**
* \param packet the packet to send
* \param fullPacketSize the size of the packet after its 802.11 MAC header has been added.
* \returns the transmission mode to use to send this packet
*/
WifiMode GetDataMode (Ptr<const Packet> packet, uint32_t fullPacketSize);
/**
* \param packet the packet to send
* \param fullPacketSize the size of the packet after its 802.11 MAC header has been added.
* \returns the transmission mode to use to send the RTS prior to the
* transmission of the data packet itself.
*/
WifiMode GetRtsMode (Ptr<const Packet> packet);
// transmission-related methods
/**
* Should be invoked whenever the RtsTimeout associated to a transmission
* attempt expires.
*/
void ReportRtsFailed (void);
/**
* Should be invoked whenever the AckTimeout associated to a transmission
* attempt expires.
*/
void ReportDataFailed (void);
/**
* Should be invoked whenever we receive the Cts associated to an RTS
* we just sent.
*/
void ReportRtsOk (double ctsSnr, WifiMode ctsMode, double rtsSnr);
/**
* Should be invoked whenever we receive the Ack associated to a data packet
* we just sent.
*/
void ReportDataOk (double ackSnr, WifiMode ackMode, double dataSnr);
/**
* Should be invoked after calling ReportRtsFailed if
* NeedRtsRetransmission returns false
*/
void ReportFinalRtsFailed (void);
/**
* Should be invoked after calling ReportDataFailed if
* NeedDataRetransmission returns false
*/
void ReportFinalDataFailed (void);
// reception-related method
/**
* \param rxSnr the snr of the packet received
* \param txMode the transmission mode used for the packet received.
*
* Should be invoked whenever a packet is successfully received.
*/
void ReportRxOk (double rxSnr, WifiMode txMode);
/**
* \param packet the packet to send
* \returns true if we want to use an RTS/CTS handshake for this
* packet before sending it, false otherwise.
*/
virtual bool NeedRts (Ptr<const Packet> packet);
/**
* \param packet the packet to send
* \returns true if we want to restart a failed RTS/CTS
* handshake, false otherwise.
*/
virtual bool NeedRtsRetransmission (Ptr<const Packet> packet);
/**
* \param packet the packet to send
* \returns true if we want to resend a packet
* after a failed transmission attempt, false otherwise.
*/
virtual bool NeedDataRetransmission (Ptr<const Packet> packet);
/**
* \param the packet to send
* \returns true if this packet should be fragmented, false otherwise.
*/
virtual bool NeedFragmentation (Ptr<const Packet> packet);
/**
* \param the packet to send
* \returns the number of fragments which should be used for this packet.
*/
virtual uint32_t GetNFragments (Ptr<const Packet> packet);
/**
* \param the packet to send
* \param fragmentNumber the fragment index of the next fragment to send (starts at zero).
* \returns the size of the corresponding fragment.
*/
virtual uint32_t GetFragmentSize (Ptr<const Packet> packet, uint32_t fragmentNumber);
/**
* \param the packet to send
* \param fragmentNumber the fragment index of the next fragment to send (starts at zero).
* \returns true if this is the last fragment, false otherwise.
*/
virtual bool IsLastFragment (Ptr<const Packet> packet, uint32_t fragmentNumber);
/**
* \param rtsMode the transmission mode used to send an RTS we just received
* \returns the transmission mode to use for the CTS to complete the RTS/CTS
* handshake.
*/
WifiMode GetCtsMode (WifiMode rtsMode);
/**
* \param ackMode the transmission mode used to send an ACK we just received
* \returns the transmission mode to use for the ACK to complete the data/ACK
* handshake.
*/
WifiMode GetAckMode (WifiMode dataMode);
private: