jigb_wlan_mac_bb.pr.c

利用opnet网络仿真软件,研究802.11的QOS,可以利用此模块研究802.11e

	Boolean     backoff_flag;  	    /* Backoff flag is set when either the collision is		*/
	                                /* inferred or the channel switched from busy to idle	*/
	Boolean     BB_flag;            /* Bandera que permite emitir el BlackBurst.			*/	 
	Boolean     BB_ini;				/* Bandera que evita desencolar de nuevo un paquete.	*/				
	Boolean     BB_retry;			/* Bandera de reenvio del BlackBurst.					*/
	Boolean     Tsch_flag;			/* Bandera que indica programaci髇 Tsch activa.			*/
	
	Boolean		frame_size_req_rts;	/* Flag that is set when the current frame in process	*/
									/* of transmission is larger than the RTS threshold.	*/
	Boolean		rts_sent;   		/* Flag to indicate that whether the RTS for this		*/
								    /* particular data frame is sent and CTS is received.	*/
	Boolean		rcvd_bad_packet;	/* Flag to indicate that the received packet is bad		*/
    Boolean	    receiver_busy;		/* Set this flag if receiver busy stat is enabled		*/	
    Boolean	    transmitter_busy;	/* Set this flag if we are transmitting something.		*/	
	Boolean		wait_eifs_dur;		/* Set this flag if the station needs to wait for eifs	*/
									/* duration.											*/	
	Boolean		gateway_flag;		/* Set this flag if the station is a gateway.			*/
	Boolean		bridge_flag;		/* Set this flag if the station is a bridge				*/
	Boolean		immediate_xmt;		/* Set this flag if the new frame can be transmitted	*/
									/* without deferring.									*/
	Boolean		forced_bk_end;		/* Special case: resume with completion of back-off (or	*/
									/* CW) period regardless of receiver's status.			*/
	Boolean		cw_required;		/* Indicates that the MAC is in contention window		*/
									/* period following a successful transmission.			*/
	Boolean		perform_cw;			/* Flag that triggers backoff process for CW period.	*/
	Boolean		nav_updated;		/* Indicates a new NAV value since the last time when	*/
									/* self interrupt is scheduled for the end of deference.*/
	Boolean		collision;			/* Set this flag if a channel became busy while another	*/
									/* one busy.											*/
	Boolean		collided_packet;	/* Set this flag to drop the next received packet		*/
									/* because of collision.								*/
	Boolean		duration_zero;		/* Set this flag if duration should be zero in next ack	*/
	Boolean		ignore_busy;		/* Set this flag if the STA should ignore receiver busy	*/
	Boolean		tx_beacon;          /* Set this flag if time to send a beacon               */
	Boolean		tx_cf_end;          /* Set this flag if time to send a CF End frame         */
	Boolean		pcf_active;         /* Set this flag for AP if PCF is currently in effect	*/
	Boolean		polled;		        /* Set this flag if the station has received a poll     */
	Boolean		more_data;			/* Set this flag if must poll for more data (MSDU)		*/
	Boolean		more_frag;			/* Set this flag if must poll for more fragments		*/
	Boolean		pcf_side_traf;		/* Set this flag if the AP detects STA to STA traffic   */
	Boolean		active_poll;		/* Set this flag if an active poll is outstanding		*/
	Boolean		non_erp_present;	/* Set this flag if we are an ERP STA and our BSS has	*/
									/* at least one non-ERP STA.							*/
	Boolean		cts_to_self;		/* Set this flag if the optional 11g CTS-to-self		*/
									/* protection mechanism is enabled for this MAC.		*/
	Boolean		rcvd_bad_cts;		/* Set if a reception is detected during the last		*/
									/* CTS-to-self transmission.							*/
	Boolean		signal_extension;	/* Set this flag after an 11g transmission using		*/
									/* ERP-OFDM mode.										*/
	Boolean		pcf_lowered_drate;	/* Set by an 11g AP, if the data rate of current tx is	*/
									/* lowered due to a piggybacked ACK for a non-ERP STA.	*/
	} WlanT_Mac_Flags;

/* This structure contains the destination address to which the received */
/* data packet needs to be sent and the contents of the received packet  */
/* from the higher layer.												 */
typedef struct WlanT_Hld_List_Elem
	{
	double		time_rcvd;  			/* Time packet is received by the higher layer	*/
	int			destination_address; 	/* Station to which this packet needs to be sent*/
	Packet*     pkptr;				 	/* store packet contents  					  	*/
	} WlanT_Hld_List_Elem;

/* Information record for each BSS */
typedef struct bss_mapping_info
	{
	int 				bss_idx;
	int					ap_sta_addr;
	Objid				ap_objid;
	WlanT_Phy_Char_Code	ap_phy_char;
	int					non_erp_sta_count;
	PrgT_Mapping_Handle sta_mapping_hndl;
	} WlanT_Bss_Mapping_Info;

/* Information record for each STA */
typedef struct sta_mapping_info
	{
	int 				sta_addr;
	WlanT_Phy_Char_Code	sta_phy_char;
	PrgT_Mapping_Handle dup_mapping_hndl;
	} WlanT_Sta_Mapping_Info;

/* Information record for each STA */
typedef struct dup_mapping_info
	{
	int 								rem_sta_addr;
	WlanT_Mac_Duplicate_Buffer_Entry*	duplicate_ptr;
	}WlanT_Duplicate_Mapping_Info;

/* Information regarding the location of each APs */
typedef struct WlanT_AP_Position_Info
	{
	struct WlanT_AP_Position_Info * next_ptr;	/* next in chain */
	
	int		ap_bss_id;
	int		ap_channel_num;
	double  tx_power;
	double	lat;
	double  lon;
	double  alt;
	}
WlanT_AP_Position_Info;


/** Global Variables **/

/* Global linked list of AP position info.									*/
WlanT_AP_Position_Info* 			global_ap_pos_info_head = OPC_NIL;

/* Global variable to keep note of the nature of the subnet.				*/
/* This variable is initialized to not set.									*/
WlanT_Bss_Identification_Approach	bss_id_type = WlanC_Not_Set;

int	num_estaciones;

double	trafico_enviado_video;

double  intento_enviado_video;

double	trafico_enviado_voz;

double  intento_enviado_voz;

double	trafico_enviado_CBR;

double  intento_enviado_CBR;

double	trafico_enviado_web;

double  intento_enviado_web;


double	trafico_descartado_video;
double	trafico_descartado_voz;
double	trafico_descartado_CBR;
double	trafico_descartado_web;

double media_retraso_normal;
double media_retraso_real;
double media_retraso_ETE_normal;
double media_retraso_ETE_real;

double num_entradas_normal;
double num_entradas_real;
double num_entradas_ETE_normal;
double num_entradas_ETE_real;


/* Read-only array of the minimum frequencies of the 12 operational 802.11a	*/
/* WLAN channels.															*/
double	WLANC_11a_CHNL_MIN_FREQ_ARRAY [WLANC_11a_OPER_CHNL_COUNT] = 
		{5170.0, 5190.0, 5210.0, 5230.0, 5250.0, 5270.0, 5290.0, 5310.0, 5735.0, 5755.0, 5775.0, 5795.0};

/* Read-only arrays for mandatory 802.11a and 802.11g data rates.			*/
double	WLANC_11a_MANDATORY_DRATE_ARRAY [3] = {24000000.0, 12000000.0, 6000000.0};
double	WLANC_11g_MANDATORY_DRATE_ARRAY [7] = {24000000.0, 12000000.0, 11000000.0, 6000000.0, 5500000.0, 2000000.0, 1000000.0};


/** Macro Definitions **/

/* When virtual scanning is used, two different thresholds are used to decide	*/
/* when the STA must start looking for a new AP, and when a new AP is			*/
/* considered acceptable. This brings in a "hysteresis" which ensures that the	*/
/* STA does not flip-flop rapidly between APs.                          		*/
#define WLANC_ROAM_SCAN_START_VIRTUAL_THRESH	rx_power_threshold
#define WLANC_ROAM_NEW_CONN_VIRTUAL_THRESH		(rx_power_threshold * 1.1)

/* Macro definitions to compute the PLCP overhead for control and data frames.	*/