Internet protocols for mobile applications
Mobile IP is a communication protocol (created by extending
Internet Protocol, IP) that allows the users to move from one
network to another with the same IP address. It ensures that the
communication will continue without the user’s sessions or
connections being dropped.
Terminologies:
Mobile Node (MN) is the hand-held communication device that
the user carries e.g. Cell phone.
Home Network is a network to which the mobile node
originally belongs as per its assigned IP address (home address).
Home Agent (HA) is a router in-home network to which the
mobile node was originally connected
Home Address is the permanent IP address assigned to the
mobile node (within its home network).
Foreign Network is the current network to which the mobile
node is visiting (away from its home network).
Foreign Agent (FA) is a router in a foreign network to which
the mobile node is currently connected. The packets from the
home agent are sent to the foreign agent which delivers them to
the mobile node.
Correspondent Node (CN) is a device on the internet
communicating to the mobile node.
Care-of Address (COA) is the temporary address used by a
mobile node while it is moving away from its home network.
Foreign agent COA, the COA could be located at the FA, i.e.,
the COA is an IP address of the FA. The FA is the tunnel end-
point and forwards packets to the MN. Many MN using the FA
can share this COA as a common COA.
Co-located COA, the COA is co-located if the MN temporarily
acquired an additional IP address which acts as COA. This
address is now topologically correct, and the tunnel endpoint is
at the MN. Co-located addresses can be acquired using services
such as DHCP.
Working:
The correspondent node sends the data to the mobile node.
Data packets contain the correspondent node’s address (Source)
and home address (Destination). Packets reach the home agent.
But now mobile node is not in the home network, it has moved
into the foreign network. The foreign agent sends the care-of-
Mobile IP is a communication protocol (created by extending
Internet Protocol, IP) that allows the users to move from one
network to another with the same IP address. It ensures that the
communication will continue without the user’s sessions or
connections being dropped.
Terminologies:
Mobile Node (MN) is the hand-held communication device that
the user carries e.g. Cell phone.
Home Network is a network to which the mobile node
originally belongs as per its assigned IP address (home address).
Home Agent (HA) is a router in-home network to which the
mobile node was originally connected
Home Address is the permanent IP address assigned to the
mobile node (within its home network).
Foreign Network is the current network to which the mobile
node is visiting (away from its home network).
Foreign Agent (FA) is a router in a foreign network to which
the mobile node is currently connected. The packets from the
home agent are sent to the foreign agent which delivers them to
the mobile node.
Correspondent Node (CN) is a device on the internet
communicating to the mobile node.
Care-of Address (COA) is the temporary address used by a
mobile node while it is moving away from its home network.
Foreign agent COA, the COA could be located at the FA, i.e.,
the COA is an IP address of the FA. The FA is the tunnel end-
point and forwards packets to the MN. Many MN using the FA
can share this COA as a common COA.
Co-located COA, the COA is co-located if the MN temporarily
acquired an additional IP address which acts as COA. This
address is now topologically correct, and the tunnel endpoint is
at the MN. Co-located addresses can be acquired using services
such as DHCP.
Working:
The correspondent node sends the data to the mobile node.
Data packets contain the correspondent node’s address (Source)
and home address (Destination). Packets reach the home agent.
But now mobile node is not in the home network, it has moved
into the foreign network. The foreign agent sends the care-of-
