13-09-2012, 12:24 PM
MOBILE IP - WIRELESS COMMUNICATION
Mobile IP-Page 2.docx (Size: 28.11 KB / Downloads: 48)
ABSTRACT
Wireless communication is the transfer of information over a distance without the use of electricalconductors or "wires". In this paper we discuss how Mobile IP works and the advantages of it in wirelesscommunication.In IP networks, routing is based on stationary IP addresses, similar to how a postal letter isdelivered to the fixed address on the envelope.
A device on a network is reachable through normal IProuting 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 reachableusing normal IP routing.
This results in the active sessions of the device being terminated. Mobile IP wascreated to enable users to keep the same IP address while traveling to a different network (which may even be on a different wireless operator), thus ensuring that a roaming individual could continue communicationwithout sessions or connections being dropped.Because the mobility functions of Mobile IP are performed at the network layer rather than thephysical layer, the mobile device can span different types of wireless and wireline networks whilemaintaining connections and ongoing applications.
Remote login, remote printing, and file transfers aresome examples of applications where it is undesirable to interrupt communications while an individualroams across network boundaries.
Also, certain network services, such as software licenses and accessprivileges, are based on IP addresses. Changing these IP addresses could compromise the network services.