NS2 Code for Mobile Ad Hoc Network

How to Implement Ns2 Coding for MANET ( Mobile Ad Hoc Network )

Quick Introduction on MANET

A MANET consists of  autonomous collection of mobile users which can communicate over relatively bandwidth in a constrained wireless links.In MANET , network is decentralized, which means all network activity including discovering the topology and delivering messages in a network must be executed by the nodes themselves.Routing functionality will be incorporated into mobile nodes for Manet simulation framework.

Multi-Hop-Communication-in-MANET

Features of MANET:

  • Variation in link and node capabilities.
  • Multi-hop routing.
  • Network scalability.
  • Autonomous and infrastructure-less.
  • Supports dynamic topologies.

Challenges Faced in Manet Network:

  • Handling frequent network partitions.
  • Limited range of transmission.
  • Discussion on route changes due to mobility.
  • Wireless link characteristics are time-varying in nature.
  • Packet losses due to errors in transmission.

 

 

Advantages of  Choosing NS2 code for Mobile Ad Hoc Network.

  • Improve flexibility.
  • Provide access to information.
  • Central Administration.
  • Services regardless of geographic position.
  • Robust Free Network.
  • Networks can set up at any place and time
  • Easy Network set up.
  • Independence from central network administration.
  • Quick Integration.

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Sample NS2 code for Mobile Ad hoc Network
void
Protoname::send_protoname_pkt() {
Packet* p                        = allocpkt();
struct hdr_cmn* ch                = HDR_CMN(p);
struct hdr_ip* ih                = HDR_IP(p);
struct hdr_protoname_pkt* ph     = HDR_PROTONAME_PKT(p);
ph->pkt_src()                     = ra_addr();
ph->pkt_len()                    = 7;
ph->pkt_seq_num()                = seq_num_++;
ch->ptype()                        = PT_PROTONAME;
ch->direction()                    = hdr_cmn::DOWN;
ch->size()                        = IP_HDR_LEN + ph->pkt_len();
ch->error()                        = 0;
ch->next_hop()                    = IP_BROADCAST;
ch->addr_type()                    = NS_AF_INET;
ih->saddr()                     = ra_addr();
ih->daddr()                        = IP_BROADCAST;
ih->sport()                        = RT_PORT;
ih->dport()                        = RT_PORT;
ih->ttl()                        = IP_DEF_TTL;
Scheduler::instance().schedule(target_, p, JITTER);
}void
Protoname::reset_protoname_pkt_timer() {
pkt_timer_.resched((double)5.0);
}


			
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