ALOHA
PROTOCOL IN C - LANGUAGE (Updated
- inputs by Thilip)
#include <stdio.h>
#include <math.h>
#include <time.h>
#include <dos.h>
#define FRAME_TIME 250
main()
{
float S1, S2, G, J, val[100]
;
int I, n, K, delay ;
void wait() ;
clrscr() ;
printf("Please Give the
Total Load : ");
scanf("%d", &n);
printf("Please Enter the
value of load \n");
for (I=0; I<n; I++)
{
scanf("%f", &val[I]);
}
clrscr();
printf("\nOUTPUT 1: (THROUGHPUT
Vs LOADCURVE)\n\n");
printf("s=g*exp(-G) FOR
SLOTTED ALOHA * \n");
printf("s=g*exp(-2G) FOR
PURE ALPHA #\n");
printf("\n------ (THROUGHPUT
PER FRAME TIME)----\n");
for(K=0; K<n; K++)
{
G=val[K];
S1 = G * exp (-G);
S2 = G * exp(-2 * G);
printf("%1.3f", G
);
for (I=0; I <=S1*20; I++)
{
printf(" ");
}
printf("*");
for(I=S2*20; I<=S2*75; I++
)
{
printf(" ");
}
printf("#\n");
}
printf("G (ATTEMPTS PER
PACKET TIME) \n\n");
wait() ;
getch() ;
clrscr() ;
printf("\nOUTPUT 2 (DELAY
Vs THROUGHPUT) \n\n");
printf("\n-----(THOUGHPUT
PER FRAME TIME)----\n");
for(K=0; K<n; K++)
{
G=val[K];
S1 = G * exp (-G);
printf("3");
for (I=0; I <=S1*2.7; I++)
{
printf(" ");
}
printf("*\n");
}
printf("\n");
printf("---- DELAY -----");
wait();
getch();
clrscr();
}
void wait()
{
sound(440);
delay(300);
nosound();
}
OUTPUT of (THROUGHPUT V/S LOADCURVE)
s=g*exp(-G) FOR SLOTTED ALOHA
*
s-g*exp(-2G) FOR PURE ALPHA
#
-----------(THROUGHPUT PER
FRAME TIME) ----->
0.0000003 * #
0.5000003
*
#
1.0000003
*
#
1.5000003
*
#
2.0000003
* #
2.5000003
*
#
3.0000003
*
#
3.5000003
*
#
G (ATTEMPTS PER PACKET TIME)
OUTPUT of (DELAY V/S THROUGHPUT)
------(THROUGHPUT PER FRAME
TIME) ---->
3 *
3*
3*
3*
3*
3*
3*
3*
3*
--- DELAY------
Slotted
Aloha
Pure Aloha
Aloha
and Network Stability
Aloha
Simulation & Reservation
Aloha Protocol
Slotted
ALOHA Simulation Parameters
ALOHA
PROTOCOL IN C - LANGUAGE
