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A O D V

A O D V. What is AODV?. Routing Protocol running into Ad-hoc Network. Dynamic Limited Resource Not Stationary. Have a active field Make route when it needs Reduce unnecessary forwarding Maintain Timer. Routing Table. 2. 5. 3. 1. 6. 4. AODV Control Packet. RREQ.

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A O D V

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  1. A O D V

  2. What is AODV? Routing Protocol running into Ad-hoc Network Dynamic Limited Resource Not Stationary Have a active field Make route when it needs Reduce unnecessary forwarding Maintain Timer

  3. Routing Table 2 5 3 1 6 4

  4. AODV Control Packet RREQ : Route Request RREP : Route Reply RREP-ACK : Route Reply-Ack RERR : Inform Broken Link

  5. AODV Control Packet RREQ RREQ 1 boradcasting RREP 3 2 4 5 RREP-ACK 6 RERR

  6. AODV Control Packet RREQ 1 boradcasting RREP 3 RREQ 2 4 5 RREP-ACK RREQ 6 RERR

  7. AODV Control Packet RREQ 1 boradcasting RREP 3 2 4 RREQ 5 RREP-ACK RREQ 6 RERR

  8. AODV Control Packet RREQ 1 RREP RREP 3 2 4 RREP 5 RREP-ACK unicasting RREP 6 RERR

  9. AODV Control Packet RREQ 1 RERR RREP 3 2 4 RERR 5 RREP-ACK RERR 6

  10. Example – Send RREQ RREQ 1 2 3 4 Update info About previous hop Update info About Originator

  11. Example – Send RREQ RREQ 1 2 3 4 Update info About previous hop Update info About Originator

  12. Example – Send RREQ RREQ 1 2 3 4 Update info About previous hop Update info About Originator

  13. Example – Send RREQ RREQ 1 2 3 4 Update info About previous hop Update info About Originator

  14. Example – Send RREP RREP 1 2 3 4 Update info About previous hop Update info About Destination

  15. Example – Send RREP RREP 1 2 3 4 Update info About previous hop Update info About Destination

  16. Example – Send RREP RREP 1 2 3 4 Update info About previous hop Update info About Destination

  17. Example – Send RREP RREP 1 2 3 4 Update info About previous hop Update info About Destination

  18. Example – Send RERR 6 7 1 4 3 2 5 While RREP is forwarding, previous node is inserted to precursor list

  19. Example – Send RERR 6 7 RREP 1 4 3 2 5 While RREP is forwarding, previous node is inserted to precursor list

  20. Example – Send RERR 6 7 RREP 1 4 3 2 5 While RREP is forwarding, previous node is inserted to precursor list

  21. Example – Send RERR 6 7 RREP 1 4 3 2 5 While RREP is forwarding, previous node is inserted to precursor list

  22. Example – Send RERR 6 7 RREP 1 4 3 2 5 While RREP is forwarding, previous node is inserted to precursor list

  23. Example – Send RERR 6 7 1 4 3 2 5

  24. Example – Send RERR 6 7 1 4 RERR 3 RERR RERR 2 5

  25. Example – Send RERR 7 9 10 RERR RERR RERR

  26. Maintain Sequence Number Seq# = Freshness of packet 6 7 3 MYSEQ=2 MYSEQ=4 RREP 8 1 5 9 4 2 Discard packet which have lower seq#

  27. Maintain Sequence Number 1) Update seq# when node generate new rreq packet. 6 7 3 MYSEQ=1 8 1 4 9 2

  28. Maintain Sequence Number 1) Update seq# when node generate new rreq packet. 6 7 RREQ 3 MYSEQ=2 8 1 4 9 2

  29. Maintain Sequence Number 1) Update seq# when node generate new rreq packet. RREQ 6 RREQ 7 3 MYSEQ=2 RREQ 8 1 RREQ 4 9 2

  30. Maintain Sequence Number 2) Neighbor node detect new infomation. 6 7 3 MYSEQ=2 8 1 4 9 2

  31. Maintain Sequence Number 2) Neighbor node detect new infomation. 6 7 3 MYSEQ=2 8 1 4 9 2

  32. Maintain Sequence Number 2) Neighbor node detect new infomation. 6 7 3 MYSEQ=2 8 1 4 RREQ RREQ 9 2 RREQ

  33. Maintain Sequence Number 2) Neighbor node detect new infomation. 6 7 3 MYSEQ = “3” 8 1 4 9 2

  34. Maintain Lifetime TTL field Use TTL field in IP Header to reduce unnecessary Broadcasting 6 TTL=2 7 TTL=1 3 TTL=2 TTL=3 8 1 TTL=2 4 9 2 TTL=2 5 TTL=1

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