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Multicast multi-hop routing for wireless mesh networks 13

Multicast multi-hop routing for wireless mesh networks

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11th International conference on Advances in Mobile computing and multimedia, MoMM 2013

作者： Al-Dubai, Ahmed Y. Zhao, Liang School of Computing Edinburgh Napier University 10 Colinton Road Edinburgh EH10 5DT United Kingdom Research and Development Corporation North Wing 301 Tower C Raycom Infotech Park 2 Kexueyuan Nanlu Beijing 100190 China

ISBN: (纸本)9781450321068

Wireless technologies have been facilitating potential digital inclusion opportunities and a wide range of community partnership platforms. Wireless Mesh networking (WMN) plays a key role in the next generation wireless and mobile networks. Supporting QoS-aware communications to enable a rich portfolio of real-time and QoS sensitive applications is foreseen to be vital for the success of the next generation WMNs. Unfortunately, existing standards supporting instant group communications in WMNs are not perfectly equipped to cater to this task as these standards come with an inherent complexity and suffer from innate problems with respect to QoS provisioning. Thus, in this study, we propose a new multicast algorithm, namely, Multicast Gateway Centralized Multi-hop Routing algorithm (MGCMR) to facilitate the instant/real time communication applications. The MGCMR is the first that considers both the requirements of instant applications and the capability of gateway based management in WMNs. Our experiments confirm the superiority of our proposed MGCMR against its counterparts. © 2013 ACM.

关键词： Routing algorithms

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HyperNet games: Leveraging SDN networks to improve multiplayer online games

HyperNet games: Leveraging SDN networks to improve multiplay...

引用

18th International conference on Computer Games: AI, Animation, Mobile, Interactive multimedia, Educational and Serious Games, CGAMES 2013

作者： Huang, Shufeng Griffioen, James Laboratory for Advanced Networking University of Kentucky Lexington KY 40506 United States

ISBN: (纸本)9781479908189

Many of today's real-time multi-player online games are highly dependent on the communication network that connects players with the game and each other. Factors such as network latency and network throughput can significantly affect a user's gaming experience. For example, many online games use a (logically) centralized game server that acts as a rendezvous point for players to exchange real-time gaming events. The number and location of these servers in the network plays a critical role in the interactive response time of the game. Currently, gaming companies go to great lengths to find the best locations for the placement of their game servers. However, finding the best locations is challenging because the number of players and their locations is not known ahead of time. Consequently, game companies typically build a generic (static) game network that hopefully will provide acceptable performance to most users. With the growing popularity of cloud computing and software defined networking (SDN), it is now possible to build a custom game network on-the-fly;a game network tailored for a particular game and its current participants (players). In this paper, we introduce the concept of a HyperNet Game that is capable of dynamically creating and deploying a software defined network tailored to the needs of the game and the current set of participants in the game. We present an example multi-player hypernet game that we have developed that is able to dynamically deploy optimally placed game servers based on the current set of players. We present performance results that show greatly improved user response times compared to the currently deployed (static) game server network used today. © 2013 IEEE.

关键词： Location

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Efficient Service Management for multimedia Sessions in Hybrid Clouds

Efficient Service Management for Multimedia Sessions in Hybr...

引用

International conference on Advanced Information networking and Applications Workshops (AINAW)

作者： Cristina Dutu Elena Apostol Catalin Leordeanu Valentin Cristea Faculty of Automatic Control and Computers University Politehnica of Bucharest Romania

ISBN: (纸本)9781467362399

multimedia services are advanced applications with large data sets, high computational resources prerequisites and distributed execution flows. The fairly new domain of cloud computing proposes a model of virtual resources management that fulfills the requirements of an efficient development and deployment environment for this type of services. Throughout this paper we present the design of a multimedia, service oriented, management system for hybrid clouds. We propose a modular and flexible architecture to handle service composition, automated service deployment with execution flow management and scalable storage capabilities. Furthermore we present the benefits of using this service management system.

关键词： multimedia communication Cloud computing Streaming media Computational modeling Databases Employment

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Mining users' activity on large Twitter text data 13

Mining users' activity on large Twitter text data

引用

5th International conference on Internet multimedia computing and Service, ICIMCS 2013

作者： Xia, Rongze Han, Yi Jia, Yan Li, Hu School of Computer National University of Defense Technology Changsha 410073 Hunan China College of EECS Peking University Beijing 100871 China

ISBN: (纸本)9781450322522

Online social network makes people interact with each other frequently. There comes an important question: at what time users always use twitter? How about users' relationship with others? How do the information flow in the network? In this paper, we conducted an experiment on a large twitter dataset, and some interesting user activity patterns have been discovered. We find that people always use twitter at night in a day. People tweet less on weekends than from Monday to Friday. We verify the power-law distribution of the degree in the network. And we propose a text-based user dividing method. We mine users' text data according to this method and divide them into different categories. Finally, we discover the information flow between different categories. © 2013 ACM.

关键词： Social networking (online)

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Raising user awareness about privacy threats in participatory sensing applications through graphical warnings 13

Raising user awareness about privacy threats in participator...

引用

11th International conference on Advances in Mobile computing and multimedia, MoMM 2013

作者： Christin, Delphine Michalak, Martin Hollick, Matthias Secure Mobile Networking Lab. TU Darmstadt Mornewegstr. 32 64293 Darmstadt Germany

ISBN: (纸本)9781450321068

Mobile phones are increasingly leveraged as sensor platforms to collect information about user's context. The collected sensor readings can however reveal personal and sensitive information about the users and hence put their privacy at stake. In prior work, we have proposed different user interfaces allowing users to select the degree of granularity at which the sensor readings are shared in order to protect their privacy. In this paper, we aim at further increasing user awareness about potential privacy risks and investigate the introduction of picture-based warnings based on their current privacy settings. Depending on their privacy conception and the proposed warnings, users can then adapt their settings or leave them unchanged. We evaluate the picture-based warnings by conducting a user study involving 30 participants. The results show that more than 70% of the participants would change their settings after having seen the picture-based warnings. © 2013 ACM.

关键词： User interfaces

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Binaural spatialization for 3d immersive audio communication in a virtual world 13

Binaural spatialization for 3d immersive audio communication...

引用

8th Audio Mostly: A conference on Interaction with Sound, AM 2013

作者： Mauro, Davide A. Mekuria, Rufael Sanna, Michele Institut Mines-Tèlècom TÈLÈCOM ParisTech CNRS-LTCI 37-39 rue Dareau 75014 Paris France Centrum Wiskunde and Informatica Sciencepark 123 1098 XG Amsterdam Netherlands Vision Research Group Queen Mary University Multimedia London United Kingdom

ISBN: (纸本)9781450326599

Realistic 3D audio can greatly enhance the sense of presence in a virtual environment. We introduce a framework for capturing, transmitting and rendering of 3D audio in presence of other bandwidth savvy streams in a 3D Tele-immersion based virtual environment. This framework presents an ef- ficient implementation for 3D Binaural Spatialization based on the positions of current objects in the scene, including animated avatars and on the y reconstructed humans. We present a general overview of the framework, how audio is integrated in the system and how it can exploit the positions of the objects and room geometry to render realistic reverberations using head related transfer functions. The network streaming modules used to achieve lip-synchronization, high-quality audio frame reception, and accurate localization for binaural rendering are also presented. We highlight how large computational and networking challenges can be addressed efficiently. This represents a first step in adequate networking support for Binaural 3D Audio, useful for telepresence. The subsystem is successfully integrated with a larger 3D immersive system, with state of art capturing and rendering modules for visual data. Copyright © 2013 ACM.

关键词： Virtual reality

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Building multi-model collaboration in detecting multimedia semantic concepts (invited paper)

Building multi-model collaboration in detecting multimedia s...

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International conference on Collaborative computing: networking, Applications and Worksharing (CollaborateCom)

作者： Hsin-Yu Ha Fausto C. Fleites Shu-Ching Chen School of Computing and Information Sciences Florida International University Miami FL USA

The booming multimedia technology is incurring a thriving multi-media data propagation. As multimedia data have become more essential, taking over a major potion of the content processed by many applications, it is important to leverage data mining methods to associate the low-level features extracted from multimedia data to high-level semantic concepts. In order to bridge the semantic gap, researchers have investigated the correlation among multiple modalities involved in multimedia data to effectively detect semantic concepts. It has been shown that multimodal fusion plays an important role in elevating the performance of both multimedia content-based retrieval and semantic concepts detection. In this paper, we propose a novel cluster-based ARC fusion method to thoroughly explore the correlation among multiple modalities and classification models. After combining features from multiple modalities, each classification model is built on one feature cluster, which is generated from our previous work FCC-MMF. The correlation between medoid of a feature cluster and a semantic concept is introduced to identify the capability of a classification model. It is further applied with the logistic regression method to refine ARC fusion method proposed in our previous work for semantic concept detection. Several experiments are conducted to compare the proposed method with other related works and the proposed method has outperform other works with higher Mean Average Precision (MAP).

关键词： Feature extraction Correlation multimedia communication Semantics Mathematical model Hidden Markov models Reliability

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An approach for mining heterogeneous data for cross-media retrieval

An approach for mining heterogeneous data for cross-media re...

引用

International conference on computing and networking Technology (ICCNT)

作者： K. Madhu Pavan V. S. Ananthanarayana Department of Information Technology National Institute of Technology Karnataka Surathkal Mangalore Karnataka India

Due to the wide availability of huge amount of multimedia data in various modalities such as image and text documents, having a great amount of similarity among them is inevitable. In this paper, we present an efficient model which correlates the similarity among documents belonging to various modalities to achieve cross-media retrieval. Cross-media retrieval is a content based information retrieval system where heterogeneous data is mined to retrieve results of various modalities, i.e., input object and returned results may be of different modalities. For example, text objects can be retrieved as a result to image input. First, features are extracted from multimedia objects by which the objects are labeled. Using the labels, similar documents are grouped to generate multimedia Documents. We construct a cross-media correlation graph with documents as vertices, where positive weight is assigned to every single edge according to the amount of similarity between vertices. The cross-media retrieval system identifies the input document and as a result returns required number of documents with highest weights.

关键词： Animals multimedia communication Training data Information retrieval Feature extraction Correlation Image segmentation

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A survey of image hashing technique for data authentication in WMSNs

A survey of image hashing technique for data authentication ...

引用

IEEE International conference on Wireless and Mobile computing, networking And Communications (WiMob)

作者： Jinse Shin Christoph Ruland Institute for Data Communications Systems University of Siegen Siegen Germany

Wireless multimedia Sensor Networks (WMSNs) are commonly used for communicating sensitive data which help in many important decision makings, so that it is crucial to ensure the received data are not manipulated in transit and originated from the correct source. In the security perspective, however, the characteristics of WMSNs and the nature of multimedia make data authentication schemes more complex, especially for data integrity. In this regard, the aim of this paper is to investigate the feasibility of content-based authentication using image hashing technique as an alternative data authentication scheme in WMSNs. To assess the feasibility, the general requirements for image authentication in WMSNs are discussed in this paper. Additionally, the performance of five selected image hashing algorithms is measured with respect to robustness, sensitivity, and security. By comparing and analyzing the performance of the selected algorithms, this paper provides a perspective on the potential feasibility and limitations as an alternative to the traditional authentication scheme in WMSNs.

关键词： Authentication Robustness Feature extraction multimedia communication Sensitivity Cryptography

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multimedia flow classification at 10 Gbps using acceleration techniques on commodity hardware

Multimedia flow classification at 10 Gbps using acceleration...

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2013 International conference on Smart Communications in Network Technologies, SaCoNeT 2013

作者： Leira, R. Gomez, P. Gonzalez, I. De Vergara, J. E. Lopez High Performance Computing and Networking Research Group Escuela Politénica Superior Universidad Autónoma de Madrid Madrid Spain

ISBN: (纸本)9781479906949

Internet is an ever-growing network. The network equipment has to be improved to cope with this growth, including those devices used to classify the network traffic. Internet service providers and network operators require to apply different QoS policies for specific protocols. Then, such classifying systems are critical. However, classification by port does not provide good results, and it is necessary to apply other more complex techniques. These classification techniques have to be fast enough to work at line rates. This paper presents a system that unifies the entire process involved in flow classification at high speed. It captures the traffic, builds flows from the received packets and finally classifies them inside a GPU. All the process is possible at 10 Gbps using commodity hardware. Our results show that the achieved performance is very influenced by the number of protocols to find, and it is limited by the number of network flows. In any case, our system reaches up to 24.4 Gbps using commodity hardware. © 2013 IEEE.

关键词： Internet protocols

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