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　With the provision of various wireless services, e.g., 3G and WLAN, more and more people
request to access the Internet anywhere at anytime. For example, people can check their e-mails
while commuting on the bus or watch the on-line news while traveling by train. Therefore,
IETF proposed the concept of mobile networks, i.e., a set of users moves as a unit. We motivate
the network mobility problem by considering the state-of-the-art scenario of the basic NEtwork
MObility (NEMO) protocol that is extended from the Mobile IPv6 (MIPv6). In order to avoid
the same problems suffered by MIPv6, a new SIP-based network mobility management called
SIP-NEMO is designed and proposed in this thesis. The proposed SIP-NEMO not only copes
with the movement of a mobile network but also achieves the route optimization between two
SIP clients, in which one is inside the mobile network and the other one is outside the mobile
network, even if the mobile network is nested. In this thesis, we also analytically compute and
simulate the performance of SIP-NEMO with the basic NEMO protocol proposed by IETF.

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