Papers by Author: Chang Hua Liu

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Authors: Chang Hua Liu, Xiu Qing Ren
Abstract: In order to improve the efficiency and security of the authentication for Hierarchical Mobile IP protocol, we propose a novel authentication scheme, which introduced identity signature and digital envelope to authenticate the sender and receiver of the registration packet. Theoretically prove that the scheme is an effective mutual authentication scheme, and improve the security and resist security attacks.
Authors: Chang Hua Liu, Xiao Le Xu, Guo Dong Ding
Abstract: With the development of computer and network technology, the pace of peoples life is more and more fast. At the same time, the need in the entertainment is also growing. The game based on handheld is becoming more and more popular. It has been booming along with the development of its educational, fun, casual, easy to carry, easy to operate, highly interactive and many other features to meet the people's entertainment needs.This paper introduces the embedded systems based on general-purpose software development model and development process, including the design of hardware platform and software. The design of the hardware platform is the QuartusII10.1, the software platform is Nios II EDS 10.1 and the programming language is C and VHDL. Based on the SPOC Builder tool, we designed the reconfigurable IP cores of the VGA display, LTM touch screen. With Galaxian game as an example, we design a embedded game based on GUI. The results show that the game system is friendly human-computer interaction and quick response and action. This configurable IP core is highly flexibility, variability, plasticity and it can achieve more functional expansion and development in the same resource.
Authors: Chang Hua Liu, Cao Yuan
Abstract: Stability is a crucial issue for transport protocols. A lot of works study how to tune the parameters of congestion control algorithms to keep the stability of networks. This paper uses the idea of re-engineering to design an adaptive-stability congestion control algorithms base on the optimization theories. Furthermore, we present one congestion control algorithm according to different stable conditions. The effectiveness of these stability criteria is validated by simulation results.
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