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MOBILE IP PRE-REGISTRATION FOR SMOOTH HANDOFF

 

TITLE MOBILE IP PRE-REGISTRATION FOR SMOOTH HANDOFF
AUTHOR EKKAWIT SAWATPEERA
DEGREE MASTER OF SCIENCE PROGRAMME IN COMPUTER SCIENCE
FACULTY FACULTY OF SCIENCE
ADVISOR SUDSANGUAN NGAMSURIYAROJ
CO-ADVISOR PANOMPORN SUVANNAPATTANA
 
ABSTRACT
Internet Protocol (IP) is currently a widely used standard protocol, and most network devices are now communicating via IP. However, the IP protocol has limits in mobility as duplicated IP addresses cannot be used at another place while the device’s IP must be maintained as a reference to other networks. Thus, mobile IP concepts are introduced and developed to solve such problems. Typically, a Mobile IP network consists of a Home Agent (HA) and Foreign Agent (FA) which is responsible for sending and receiving data from the Correspondent Node (CN) to the Mobile Node (MN) through node registration, data encapsulation, tunneling, and data decapsulation processes. However, a Mobile IP network has limitations since it encounters the problems of triangular routing, packet loss, and packet delay. Such problems reduce the smoothness of data transfer, and decrease the throughput of the data transfer during the handoff between MN and FA. This thesis proposes a solution to smooth handoff mechanism between CN and MN by replacing the traditional registration process with a pre- registration process. In addition, double tunneling is deployed to help smooth the handoff. The proposed idea is evaluated using the ns-2 network simulator and tested on two workloads: file transfer (FTP) data and constant bit rate (CBR) stream data. The results show that the pre-registration obviously helps smooth throughput rate in CBR data, but only slightly improves FTP data since FTP is based on TCP which will resend data if there is packet loss during the transfer.
KEYWORD Mobile IP/ Pre-registration/ Mobile Node (MN)/ Correspondent Node (CN)/ Home Agent (HA)/ Foreign Agent (FA)

 

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