Research in NS2

Applications of broadcast routing in vanet:

• sharing weather.
• delivering advertisements among vehicles.
• road conditions among vehicles announcements.
• traffic .

Types of broadcast routing protocols:

• SRB.
• BROADCOMM.
• UMB.
• V-TRADE.
• DECA.
• POCA.
• EAEP .
• DV-CAST.
• PBSM.
• PGB.

Sample code for broadcast Research in NS2:

This is the sample code for broadcasting messages between three nodes.

int TreeAgent::command(int argc, const char*const* argv) {

int n;

if (argc >= 2) {

//…………………………………………………………………………..

if (strcmp(argv[1], “set_base_station”) == 0) { // Usage:

set_base_station number

set_base_station(atoi(argv[2]));

// Create a new packet

Packet* pkt = allocpkt();

// Access the Tree header for the new packet:

hdr_tree* hdr = hdr_tree::access(pkt);

n =  get_nodeid();

hdr->info[0] = n;

hdr->info[1] = 0;

hdr->info[2] = (char)argv[2][0];

printf(“Time begining simulation: %f\n”,

Scheduler::instance().clock());

// Send the packet

send(pkt, 0);

printf(“Node %d sent its packet\n”, n);

// return TCL_OK, so the calling function knows that the command has

been processed

return (TCL_OK);

}// end set_base_station