1. Under the Guidance of: 1 Mr. R.TRINADH Presented By: J.KEDHARESWAR 09NH1A0422(III ECE-A) V.K.R,V.N.B & A.G.K COLLEGE OF ENGINEERING

2.  Wireless communication is the transfer of information over a distance without the use of " Electrical conductors " or “Wires".  In IP networks, routing is based on stationary IP addresses, similar to how a postal letter is delivered to the fixed address on the envelope. 2

3.  A device on a network is reachable through normal IP routing by the IP address it is assigned on the network.  The problem occurs when a device roams away from its home network and is no longer reachable using normal IP routing where Mobile IP comes into play. 3

4. 4 ADDRESSING The main problem that must be solved in providing mobile communication using the IP protocol is addressing.  Stationary Hosts  Mobile Hosts

5. 5 Mobile IP has two addresses for a mobile host: one home address and one care-of address. The home address is permanent; the care-of address changes as the mobile host moves from one network to another.

6. 6 AGENTS To make the change of address transparent to the rest of the Internet requires a home agent and a foreign agent. The specific function of an agent is performed in the application layer.  Home Agent  Foreign Agent

7. 7 Home agent and foreign agent When the mobile host and the foreign agent are the same, the care-of address is called a co-located care-of address.

8. 8 THREE PHASES To communicate with a remote host, a mobile host goes through three phases: agent discovery, registration, and data transfer.  Agent Discovery  Registration  Data Transfer

9. 9 Remote host and mobile host communication Mobile IP does not use a new packet type for agent advertisement; it uses the router advertisement packet of ICMP, and appends an agent advertisement message.

10. 10 Agent advertisement

11. 11 Registration request and reply

12. 12 Registration request format

13. 13 Registration request flag field bits

14. 14 Advantage of MOBILE IP  Mobile IP uses a strong authentication scheme for security purposes.  All registration messages between a Mobile Node and Home Agent are required to contain the Mobile-Home Authentication Extension (MHAE).

15.  Mobile data communication will likely emerge as the technology supporting most communication including voice and video.  Mobile data communication will be used in cellular systems such as 3G and in wireless LAN, and will extend into satellite communication. 15

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17. 17 THANK YOU