Affiliations: Department of Information and Communication
Engineering, Fukuoka Institute of Technology (FIT), 3-30-1 Wajiro-Higashi-ku,
Fukuoka 811-0295, Japan | Dipartimento di Informatica e Sistemistica, University
of Naples "Federico II", via Claudio 21, 80125, Napoli, Italy
Abstract: The micro-mobility is an important aspect in mobile communications,
where the applications are anywhere and used anytime. One of the problems of
micro-mobility is the hand-off latency. In this paper, we analyse two solutions
for IP micro-mobility by means of a general taxonomy. The first one is based on
the Stream Control Transmission Protocol (SCTP), which allows the dynamic
address configuration of an association. The second one is based on the Session
Initiation Protocol (SIP), which is the most popular protocol for multimedia
communications over IP networks. We show that for the SCTP solution, there is
room for further optimisations of the hand-off latency by adding slight changes
to the protocol. However, as full end-to-end solution, SCTP is not able to
handle simultaneous movement of hosts, whose probability in general cannot be
neglected. On the other hand, the SIP can handle both single and simultaneous
movements cases, although the hand-off latency can increase with respect to the
SCTP solution. We show that for a correct and fast hand-off, the SIP server
should be statefull.
Keywords: Mobile IP, wireless networks, SCTP, SIP, simultaneous movements
