802_11_mac.h

基于Oment++的无线传感器网络仿真

#ifndef _802_11_Mac_H__
#define _802_11_Mac_H__

#include "CommonIncludes.h"
#include "MACLayerBase.h"
#include "MAC_802_11_Packet_m.h"
#include "Calculations.h"
#define minCW 31
#define maxCW 1023
#define shortRetryLimit 7

/*#include <fstream.h>*/

class MAC_802_11 : public MACLayerBase
{
	private:
		int      m_FragmentLength;
		int      m_BitRate;
		double   m_SIFS;
		double   m_DIFS;
		double   m_EIFS;
		double   m_SlotTime;
		double   m_NAVTimer;
		double   m_New_NAVTimer;
		double   tstamp_NAVTimer;
		double   remainingBOffTime;
		double   tstamp_BOffTimer;
		double   iBOffTime;
		cQueue   m_QueueOfFragments;
	 	
		cQueue   m_QueueOfCollisionMsgs;		
		cMessage *m_pMsgRTSExpired;
	 	cMessage *m_pMsgNAVTimer;
	 	cMessage *m_pMsgDIFSTimer;
		cMessage *m_pMsgCollisionTimer;
		cMessage *m_pMsgBOffTimer;
		int testvar;
		int Bflag;
		char fName[20];
		bool fWrite;
		char fileb[10];
		int originMsgSrc;
		int cw;
		int MyNodeId;
		int ssrc;
		int RtsExpiredCount;
		int seq_no;
		int no_of_nodes;
	public:
		MAC_802_11(const char *name, cModule *parentModule, unsigned stacksize = 0) ;
		void changeNAVTimer();
		virtual void initialize();
		virtual void handleMessage(cMessage *msg);
		virtual void handleSelfMessage(cMessage *msg);

		virtual void HandleMessageFromTopLayer(cMessage *msg);
		virtual void HandleMessageFromBottomLayer(cMessage *msg);
		virtual void finish();	
		cModule *pNode;
		cModule *pNetwork;
	private:
		bool Create_ACK_Message(cMessage *msg, c802_11_Packet **ppAckMsg);
		bool Create_Data_Message(cMessage *msg, int iFragmentIndex, int numOfFragments, c802_11_Packet **ppDataMsg);
		bool Create_CTS_Message(cMessage *msg, c802_11_Packet **ppCTSMsg);
		bool Create_RTS_Message(cMessage *msg, c802_11_Packet **ppRTSMsg);
		bool Create_BRDCAST_Message( cMessage *msg, c802_11_Packet **ppBTSMsg);

		bool AddPosInfo(c802_11_Packet* pMACMsg);
		bool CheckIfMessageIsForMe(cMessage* msg);
		int  CheckWChannelStateAndTransmit(void);
		double getPropagationDelay( );
		void  resetCW(){cw = minCW;};
		void incContentionWindow(){ (cw= (cw<<1) + 1);
						if(cw > maxCW) cw=maxCW;
						/*printf(" cw_ %d = \n", cw );*/ };
				
};

#endif //