The employment of real-time capable handoff mechanisms for high-speed mobile stations represents one of the key challenges for adopting IEEE 802.11 technology as a basic communication technology for roadside networks ...
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The employment of real-time capable handoff mechanisms for high-speed mobile stations represents one of the key challenges for adopting IEEE 802.11 technology as a basic communication technology for roadside networks in vehicular communication networks (VCNs), especially for real-time value added services such as VoIP. To enable real-time capable handoff mechanism in such environments, the mobility awareness of associated stations (STAs) can be used to significantly reduce the scanning delays within handoff process. Although IEEE 802.11k and 802.11v define several mechanisms that could be used to enhance the handoff process with location awareness functionality, none of the known handoff solutions combine those mechanisms in a unified standard-conform handoff solution. This paper introduces a set of three novel handoff concepts that combine mechanisms of 802.11k,r,v in order to provide real-time capable handoff mechanisms that can be used for VCNs' applications, especially in combination with value added services. All the proposed handoff mechanisms in this paper are vender-independent from STAs perspective, i.e., for all STAs supporting 802.11k,r,v standards.
For the sake of building the theoretical system of the designing course teaching, developing multimedia teaching resources to correspond with the teaching rules of higher education. Based on theoretical analysis, this...
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Since years, the infrastructural support of pervasive environments like intelligent rooms and houses is an active matter of research. Corresponding projects have been agreed upon service-oriented architectures (SOA) t...
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Due to advancements in lighting technologies new opportunities for application emerge. In this paper an interdisciplinary study towards the development of adaptive lighting environments is presented. An implementation...
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Due to advancements in lighting technologies new opportunities for application emerge. In this paper an interdisciplinary study towards the development of adaptive lighting environments is presented. An implementation of an adaptive lighting environment is made in the domain of office work. For evaluation, experts from the domains of human-system interaction, activity and context recognition, and system architecture design are interviewed. Contributions are made with regard to the implementation of the adaptive lighting in office environments and an evaluation method that is in line with the interdisciplinary approach. From the evaluation method insights in the fields of human-computer interaction, activity and context recognition and system architecture and (wireless) networking and in topics that span across these fields are gained.
This paper proposes an audio zero-watermarking algorithm based on Fast Fourier Transform (FFT).This algorithm does not change any contents about the audio signals. It proposes a solution about the contradictions about...
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Service compositions build new services by orchestrating a set of existing services. In the Internet of Services there may be many functional similar services, but with different Quality of Service (QoS). Thus a signi...
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For each service class, there exist many alternative web services that provide the same functionality and different quality parameters, to find an optimal composition, most service selection approach in decentralized ...
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Delay and Tolerant Networks (DTNs) have been proposed to address data communication challenges in network scenarios, where no instantaneous end-to-end path is guaranteed because of frequent and long duration network p...
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In this work, a framework of multimedia retrieval system basing on the MPEG-7 standard as information schema will be proposed. It provides a content-based retrieval method which uses MPEG-7 Metadata description. The h...
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