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Mobility management is one area where context-awareness can be of great use. However, most context-management systems have been developed for smart spaces and are not designed for highly mobile devices. We propose an architecture for context-aware mobility management that is both distributed and hierarchical. The architecture consists of a global context server, a number of local proxy and adaptation...
Disasters in last decade have rapidly increased the research activities related to emergency communications. This paper presents a model for cognitive identification of post-disaster situation. A two-state model for mobile handsets along with a software based identification module is introduced for the said purpose. This paper also discusses implementation solutions based on: traditional cellular...
In this paper, the feasibility and necessity of a new concept for radio standard spanning communication in mobile Ad Hoc networks (MANET) has been analysed. Past research approaches limited their solutions to the usage in a homogeneous topology on basis of a unique radio standard. The proposed concept offers the possibility to connect standardised radio modules on a hardware near layer by the usage...
Accurate and low-cost localisation is an essential requirement in many sensor and ad hoc network applications. This paper presents a platform, both hardware and software, that has been developed as a flexible tool for research in ubiquitous localisation in applications such as emergency services. The system has also been designed to be small and with sufficiently long battery life to be suitable for...
In the mobile telecommunication network, the expansion in Internet traffic will cause the demand for IP addresses. Further WiBro will also stimulate the interworking for IP addresses. In fact, many working groups are designing an adaptation mechanism between WiBro and IPv6/MIPv6. Accordingly, from the viewpoint of security, interworking between 802.16e and MIPv6 is essential. In this paper, we propose...
The hierarchical mobile IPv6 (HMIPv6) has been proposed by IETF to reduce registration control signaling. It separates micro-mobility from macro-mobility with the help of an intermediate mobility agent, called the mobility anchor point (MAP), and exploits a mobile node's (MN's) spatial locality. However, in HMIPv6, the handover process reveals numerous problems manifested by the latency in configuring...
In the standard mobile IP (MIP) protocol, packets sent from a correspondent node (CN) to a mobile node (MN) currently away from its home network, have to first be routed to the MN's home agent and subsequently forwarded to the MN via tunneling. Unfortunately, the procedure suffers from throughput degradation under TCP due to the triangle routing problem, where paths are often significantly longer...
The key to protect huge amount of multimedia data in ubiquitous networks is to introduce safety aware high-performed single VLSI processor systems embedded with cipher process. Thus, we exploited the architecture of a hardware cryptography-embedded multimedia mobile processor named HCgorilla by sophisticatedly unifying up-to-date processor techniques. Although it was provided with carefully selected...
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