7,196 research outputs found
Cooperative announcement-based caching for video-on-demand streaming
Recently, video-on-demand (VoD) streaming services like Netflix and Hulu have gained a lot of popularity. This has led to a strong increase in bandwidth capacity requirements in the network. To reduce this network load, the design of appropriate caching strategies is of utmost importance. Based on the fact that, typically, a video stream is temporally segmented into smaller chunks that can be accessed and decoded independently, cache replacement strategies have been developed that take advantage of this temporal structure in the video. In this paper, two caching strategies are proposed that additionally take advantage of the phenomenon of binge watching, where users stream multiple consecutive episodes of the same series, reported by recent user behavior studies to become the everyday behavior. Taking into account this information allows us to predict future segment requests, even before the video playout has started. Two strategies are proposed, both with a different level of coordination between the caches in the network. Using a VoD request trace based on binge watching user characteristics, the presented algorithms have been thoroughly evaluated in multiple network topologies with different characteristics, showing their general applicability. It was shown that in a realistic scenario, the proposed election-based caching strategy can outperform the state-of-the-art by 20% in terms of cache hit ratio while using 4% less network bandwidth
A Study to Optimize Heterogeneous Resources for Open IoT
Recently, IoT technologies have been progressed, and many sensors and
actuators are connected to networks. Previously, IoT services were developed by
vertical integration style. But now Open IoT concept has attracted attentions
which achieves various IoT services by integrating horizontal separated devices
and services. For Open IoT era, we have proposed the Tacit Computing technology
to discover the devices with necessary data for users on demand and use them
dynamically. We also implemented elemental technologies of Tacit Computing. In
this paper, we propose three layers optimizations to reduce operation cost and
improve performance of Tacit computing service, in order to make as a
continuous service of discovered devices by Tacit Computing. In optimization
process, appropriate function allocation or offloading specific functions are
calculated on device, network and cloud layer before full-scale operation.Comment: 3 pages, 1 figure, 2017 Fifth International Symposium on Computing
and Networking (CANDAR2017), Nov. 201
Experiments of posture estimation on vehicles using wearable acceleration sensors
In this paper, we study methods to estimate drivers' posture in vehicles
using acceleration data of wearable sensor and conduct a field test. Recently,
sensor technologies have been progressed. Solutions of safety management to
analyze vital data acquired from wearable sensor and judge work status are
proposed. To prevent huge accidents, demands for safety management of bus and
taxi are high. However, acceleration of vehicles is added to wearable sensor in
vehicles, and there is no guarantee to estimate drivers' posture accurately.
Therefore, in this paper, we study methods to estimate driving posture using
acceleration data acquired from T-shirt type wearable sensor hitoe, conduct
field tests and implement a sample application.Comment: 4 pages, 4 figures, The 3rd IEEE International Conference on Big Data
Security on Cloud (BigDataSecurity 2017), pp.14-17, Beijing, May 201
Design & Deploy Web 2.0 enable services over Next Generation Network Platform
The Next Generation Networks (NGN) aims to integrate for IP-based telecom
infrastructures and provide most advance & high speed emerging value added
services. NGN capable to provide higher innovative services, these services
will able to integrate communication and Web service into a single platform. IP
Multimedia Subsystem, a NGN leading technology, enables a variety of
NGN-compliant communications services to interoperate while being accessed
through different kinds of access networks, preferably broadband. IMS-NGN
services essential by both consumer and corporate users are by now used to
access services, even communications services through the web and web-based
communities and social networks, It is key for success of IMS-based services to
be provided with efficient web access, so users can benefit from those new
services by using web-based applications and user interfaces, not only NGN-IMS
User Equipments and SIP protocol. Many Service are under planning which
provided only under convergence of IMS & Web 2.0. Convergence between Web 2.0
and NGN-IMS creates and serves new invented innovative, entertainment and
information appealing as well as user centric services and applications. These
services merge features from WWW and Communication worlds. On the one hand,
interactivity, ubiquity, social orientation, user participation and content
generation, etc. are relevant characteristics coming from Web 2.0 services.
Parallel IMS enables services including multimedia telephony, media sharing
(video-audio), instant messaging with presence and context, online directory,
etc. all of them applicable to mobile, fixed or convergent telecom networks.
With this paper, this paper brings out the benefits of adopting web 2.0
technologies for telecom services. As the services are today mainly driven by
the user's needs, and proposed the concept of unique customizable service
interface
Web Services Support for Dynamic Business Process Outsourcing
Outsourcing of business processes is crucial for organizations to be effective, efficient and flexible. To meet fast-changing market conditions, dynamic outsourcing is required, in which business relationships are established and enacted on-the-fly in an adaptive, fine-grained way unrestricted by geographic distance. This requires automated means for both the establishment of outsourcing relationships and for the enactment of services performed in these relationships over electronic channels. Due to wide industry support and the underlying model of loose coupling of services, Web services increasingly become the mechanism of choice to connect organizations across organizational boundaries. This paper analyzes to which extent Web services support the dynamic process outsourcing paradigm. We discuss contract -based dynamic business process outsourcing to define requirements and then introduce the Web services framework. Based on this, we investigate the match between the two. We observe that the Web services framework requires further support for cross - organizational business processes and mechanisms for contracting, QoS management and process-based transaction support and suggest ways to fill those gaps
Electronic administration in Spain: from its beginnings to the present
This study presents the basic lines of electronic administration in Spain.
The complexity of the Spanish political-administrative system makes such a
study challenging, in view of the considerable degree of autonomy and
competences of the regional administrative bodies and local agencies with
respect to the central government, the former being more visible in the 17
regions of Spain. Nonetheless, the central government maintains a series of
legal instruments that allow a certain common framework of action to be
imposed, aside from what is put into effect through diverse programs aimed
precisely to develop common tools for the regions and municipalities of Spain.
After an introduction that provides some necessary background, this study
describes the legislative framework in which Spain's electronic administrative
system has developed. The data included in the study refer to investment in
information and communication technologies (ICT) and the services offered by
the different Administrations on the internet; internet access by citizens,
homes, businesses, and employees, as well as the interactivity existing with
administrations by means of the internet; the origins and rise of various
political initiatives of the Central Government involving electronic
administration; and finally, the situation of civil service personnel, as
catalysts of the success of Information Society in the Public Administration
within Spain
Value creation in mobile banking
The convergence of the Internet and mobile networks creates new opportunities and applications. Treating mobile business as simply an extension to the traditional web could result in missing out unique differentiated qualities for new value-added possibilities. Mobile Banking is considered to be one of the most value-added and important mobile service available. The current research examined technological changes in mobile networks and innovative attributes of Mobile Internet. It has advanced the theoretical framework of innovation in service to develop a customer centric analysis of mBanking value proposition. The article goes on to discuss critical factors in the diffusion of mBanking and explores reasons of failure and further prospects of success.Mobile Banking
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