Dr. Junzhao Sun Profile

Dr. Junzhao Sun

at Univ of Oulu

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Publications (2)

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Proceedings Article | 18 October 2001 Paper

Mobility management techniques for the next-generation wireless networks

Junzhao Sun, Douglas Howie, Jaakko Sauvola

Proceedings Volume 4586, (2001) https://doi.org/10.1117/12.445223

KEYWORDS: Networks, Internet, Mobile communications, Telecommunications, Network architectures, Manganese, Wireless communications, Computer security, Network security, Standards development

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The tremendous demands from social market are pushing the booming development of mobile communications faster than ever before, leading to plenty of new advanced techniques emerging. With the converging of mobile and wireless communications with Internet services, the boundary between mobile personal telecommunications and wireless computer networks is disappearing. Wireless networks of the next generation need the support of all the advances on new architectures, standards, and protocols. Mobility management is an important issue in the area of mobile communications, which can be best solved at the network layer. One of the key features of the next generation wireless networks is all-IP infrastructure. This paper discusses the mobility management schemes for the next generation mobile networks through extending IP's functions with mobility support. A global hierarchical framework model for the mobility management of wireless networks is presented, in which the mobility management is divided into two complementary tasks: macro mobility and micro mobility. As the macro mobility solution, a basic principle of Mobile IP is introduced, together with the optimal schemes and the advances in IPv6. The disadvantages of the Mobile IP on solving the micro mobility problem are analyzed, on the basis of which three main proposals are discussed as the micro mobility solutions for mobile communications, including Hierarchical Mobile IP (HMIP), Cellular IP, and Handoff-Aware Wireless Access Internet Infrastructure (HAWAII). A unified model is also described in which the different micro mobility solutions can coexist simultaneously in mobile networks.

Proceedings Article | 27 July 2001 Paper

Hybrid model for wireless mobility management using IPv6

Douglas Howie, Junzhao Sun, Antti Koivisto

Proceedings Volume 4531, (2001) https://doi.org/10.1117/12.434458

KEYWORDS: Autoregressive models, Systems modeling, Multimedia, Performance modeling, Manganese, Mobile devices, Standards development, Argon, Internet, Data modeling

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Within the coming decade, there will be a dramatic increase in the availability of inexpensive, computationally powerful mobile devices running applications which use the Internet Protocol (IP) to access multimedia services over broad-band wireless connections. To this end, there has been extensive research and standardization in the areas of Mobile IP and IPv6. The purpose of this paper is to apply this work to the issues involved in designing a mobility model able to adapt to different wireless mobile IP scenarios. We describe the usefulness of this model in the 4th generation mobile multimedia systems to come. This new model has been synthesized through a comparative analysis of current mobile IP models where particular attention has been given to the problems of mobile IP handoff and mobility management and their impact on QoS. By applying a unique perspective to these problems, our model is used to set a roadmap for future mobile IPv6 testbed construction.

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