Equipping with feature rich sensors, smart phone are able to run many interesting applications utilizing these sensors. For example, many location based services are based on GPS sensor. In this paper, we present a ne...
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Internet users are now able to connect to the Internet anywhere at any time for the provision of ubiquitous wireless network. Furthermore, as IEEE 802.11 wireless networks have deployed widely, passengers of Mass Rapi...
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ISBN:
(纸本)9783642236402
Internet users are now able to connect to the Internet anywhere at any time for the provision of ubiquitous wireless network. Furthermore, as IEEE 802.11 wireless networks have deployed widely, passengers of Mass Rapid Transit (MRT), one of the most popular transportation systems in modern cities nowadays, can access to the Internet through their mobile devices easily. However, MRT passengers bring massive simultaneous handovers to the system while they are getting on and off MRT coaches. Hence, mobility management becomes a challenging problem for ubiquitous Internet service in a MRT system. Although Mobile IPv6 (MIPv6) is designed to support IP mobility, several drawbacks of MIPv6 are reported and result in unacceptable handover latency. As a consequence, many proposals, such as Fast handovers for Mobile IPv6, Hierarchical Mobile IPv6 (HMIPv6), Fast Handover for Hierarchical MIPv6 (F-HMIPv6), and Proxy Mobile IPv6, have been proposed to tackle these drawbacks. Nevertheless, none of these proposals are adequate to cope with the large-number-simultaneous-handovers challenge. In this paper, we propose a context-aware seamless handover mechanism (C-HMIPv6) which solves the massive simultaneous handover problem based on the concept of context-awareness. C-HMIPv6 is based on HMIPv6 with following special designs. Firstly, distributed mobility anchor points (MAPs) are deployed to separate the loading of forwarding traffic. Secondly, every access router (AR) periodically exchanges mobile nodes (MNs') context with adjacent ARs and periodically broadcasts the network configuration of adjacent ARs to its MNs. Thus, all MNs and ARs are fully context-awareness in the MRT system. The MN is able to generate its new CoA prior to the actual handover and skip IEEE 802.11 channel scanning, which alleviate the majority of the handover latency. The old AR can notify the MN's MAP to take care of the MN's packets during the handover procedure while the new AR can perform binding update
Nowadays, "cards" are becoming part of our lives. The cards enable us to obtain different kinds of services conveniently, but may also bring us economic loss if they are used illegally by some malicious thir...
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Machine to Machine (M2M) technology has the potential to increase the revenue, decrease the costs and improve the customer services of an organization. We have analyzed the management requirements of M2M systems, whic...
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The importance of the data stored in the smart phones is increased as more applications are deployed and executed. Once the smart phone is damaged or lost, the valuable information treasured in the device is lost alto...
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A novel feature selection method was proposed for electromyography (EMG)-based affective recognition. First of all, correlation analysis was used to reduce the dimension of original feature subset;then adaptive Tabu s...
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DC-DC booster converter in PWM switch mode is used for high power white LED. Electromagnetic interference, load disturbance, etc existing in circuits make their analysis and control difficult. Because of this, on the ...
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Unified Modeling Language has been widely used in software development for modeling the problem domain to solution domain. The major problems lie in comprehension and testing which can be found in whole process. Progr...
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Maintaining uniformity of software requirement documents with the artifacts of other phases of software lifecycle is very important. However, it is a difficult and time-consuming task. Natural language usually contain...
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