Mobile internet protocol

1. MOBILE INTERNET
PROTOCOL
By-Mrutyunjaya behera

2. Overview of mobile ip
□ The goal of mobile IP is to enable packet transmission efficiently
without any packet loss and disruptions in the presence of host and or
destination mobility.

3. Mobile ip
□ Mobile IP is an IETF (Internet Engineering Task Force) standard
communications protocol designed to allow mobile devices (such as
laptop. PDA, mobile phone, etc.) users to move from one network to
another while maintaining their permanent IP (Internet Protocol)
address.
□ The IP Defined in RFC 791 (Request for Comments). The mobile IP is
an enhancement of the internet protocol (IP) that adds mechanisms
for forwarding internet traffic to mobile devices (known as mobile
nodes - MN) when they are connecting through other than their home
network(HN).

4. Mobile ip topology
Mobile node Internet host Mobile node
internet
Home Agent Foreign Agent
Router Router
Wireless
Transceiver Wireless
Transceiver
Foreign
Network
Home
Network

5. □ At First, the internet host sends a datagram to the mobile node using
the mobile node's home address (normal IP routing process) known as
Home Network
□ If the mobile node (MN) is on its home network, the datagram is
delivered through the normal IP (Internet Protocol) process to the
mobile node. Otherwise the home agent picks up the datagram.
□ If the mobile node (MN) is on foreign network, the home agent
(HA)forwards the datagram to the foreign agent.
□ The foreign agent (FA) delivers the datagram to the mobile node.
□ Datagram from the MN to the Internet host are sent using normal IP
routing procedures. If the mobile node is on a foreign network, the
packets are delivered to the foreign agent. The FA forwards the
datagram to the Internet host.

6. □ In the case of wireless communications, the above illustrations
illustratethe use of wireless transceivers to transmit the datagram to
the mobilenode.
□ All datagram between the Internet host and the MN, use the mobile
node's home address regardless of whether the mobile node is on a
home or foreign network.
□ The care-of address (COA) is used only for communication with
mobility agents and is never seen by the Internet host.

7. Mobile IPTechnology
□ Mobile Node (MN): Mobile node can be called as the device (cell
phone, PDA, laptop etc..)or user or router that are capable of frequently
changing their positions in the network without changing their
original IP address.
□ Home Network (HN): The Home Network of a mobile device is the
network to which mobile node originally belongs to.
□ Home Agent (HA): The HA stores information about all mobile nodes
whose permanent home address is in the network assigned to the HA.
The HA maintains a location of directory of the mobile handsets
belonging permanently to the home network and acts as a router for
delivery of datagram to the MN, when it is away from home.

8. Agent Discovery
□ The task of determining a mobile node's foreign agent during call
establishment, is know as Agent Discovery.
 It can be done in two ways
1. - Agent advertisement
2. - Agent solicitation

9. Agent Advertisement
An agent advertisement message has one or more care-of-addresses and a
flag indicating whether it is a home agent or foreign agent.
Agent solicitation
An agent solicitation message will be sent by Mobile Node(MN), when
the MN does not receive any care-ofcare-of-address(COA) to search for
a foreign agent(FA).

10. THANKYOU