05-10-2012, 01:28 PM
MOBILE IP
MOBILE IP.pptx (Size: 528.47 KB / Downloads: 22)
IP Address
An Internet Protocol address (IP address) is a numerical label assigned to each device (e.g., computer, printer) participating in a computer network that uses the Internet Protocol for communication.
An IP address serves two principal functions:
host or network interface identification
location addressing.
What is Mobile IP?
Mobile IP (or IP mobility) is an Internet Engineering Task Force (IETF) standard communications protocol that is designed to allow mobile device users to move from one network to another while maintaining a permanent IP address.
Using Mobile IP, nodes may change their point-of-
attachment to the Internet without changing their home IP address.
Why Mobile IP?
Need a protocol which allows network connectivity across host movement
Protocol to enable mobility must not require massive changes to router software, etc.
Must be compatible with large installed base of IPv4 networks/hosts
Confine changes to mobile hosts and a few support hosts which enable mobility
SECURlNG THE REGISTRATION PROCEDURE
Registration in mobile IP must be made secure so that fraudulent registrations can be detected and rejected.
There are three authentication extensions used with mobile IP, as follows:
->The mobile-home authentication extension
-> The mobile-foreign authentication extension
->The foreign-home authentication extension
Problems with Mobile IP
Suboptimal “triangle” routing
What if MN is in same sub network as the node to which it is communicating and HA is on the other side of the world?
Solution: Let the CN know the COA of MN
Then the CN can create its own tunnel to MN
CN must be equipped with software to enable it to learn the COA
Initiated by HA who notifies CN via “binding update”
Binding table can become stale
CONCLUSIONS………
Mobility support in the network layer is of special importance, as the network layer holds together the huge internet with common protocol IP.
Mobile IP has been designed to enable mobility in the internet without changing the existing wired system.
However mobile IP leaves some unsolved points, especially when it comes to security, efficiency of packet flow and support of quality of service.
MOBILE IP.pptx (Size: 528.47 KB / Downloads: 22)
IP Address
An Internet Protocol address (IP address) is a numerical label assigned to each device (e.g., computer, printer) participating in a computer network that uses the Internet Protocol for communication.
An IP address serves two principal functions:
host or network interface identification
location addressing.
What is Mobile IP?
Mobile IP (or IP mobility) is an Internet Engineering Task Force (IETF) standard communications protocol that is designed to allow mobile device users to move from one network to another while maintaining a permanent IP address.
Using Mobile IP, nodes may change their point-of-
attachment to the Internet without changing their home IP address.
Why Mobile IP?
Need a protocol which allows network connectivity across host movement
Protocol to enable mobility must not require massive changes to router software, etc.
Must be compatible with large installed base of IPv4 networks/hosts
Confine changes to mobile hosts and a few support hosts which enable mobility
SECURlNG THE REGISTRATION PROCEDURE
Registration in mobile IP must be made secure so that fraudulent registrations can be detected and rejected.
There are three authentication extensions used with mobile IP, as follows:
->The mobile-home authentication extension
-> The mobile-foreign authentication extension
->The foreign-home authentication extension
Problems with Mobile IP
Suboptimal “triangle” routing
What if MN is in same sub network as the node to which it is communicating and HA is on the other side of the world?
Solution: Let the CN know the COA of MN
Then the CN can create its own tunnel to MN
CN must be equipped with software to enable it to learn the COA
Initiated by HA who notifies CN via “binding update”
Binding table can become stale
CONCLUSIONS………
Mobility support in the network layer is of special importance, as the network layer holds together the huge internet with common protocol IP.
Mobile IP has been designed to enable mobility in the internet without changing the existing wired system.
However mobile IP leaves some unsolved points, especially when it comes to security, efficiency of packet flow and support of quality of service.