5,954 research outputs found
Survey of End-to-End Mobile Network Measurement Testbeds, Tools, and Services
Mobile (cellular) networks enable innovation, but can also stifle it and lead
to user frustration when network performance falls below expectations. As
mobile networks become the predominant method of Internet access, developer,
research, network operator, and regulatory communities have taken an increased
interest in measuring end-to-end mobile network performance to, among other
goals, minimize negative impact on application responsiveness. In this survey
we examine current approaches to end-to-end mobile network performance
measurement, diagnosis, and application prototyping. We compare available tools
and their shortcomings with respect to the needs of researchers, developers,
regulators, and the public. We intend for this survey to provide a
comprehensive view of currently active efforts and some auspicious directions
for future work in mobile network measurement and mobile application
performance evaluation.Comment: Submitted to IEEE Communications Surveys and Tutorials. arXiv does
not format the URL references correctly. For a correctly formatted version of
this paper go to
http://www.cs.montana.edu/mwittie/publications/Goel14Survey.pd
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Multimedia delivery in the future internet
The term âNetworked Mediaâ implies that all kinds of media including text, image, 3D graphics, audio
and video are produced, distributed, shared, managed and consumed on-line through various networks,
like the Internet, Fiber, WiFi, WiMAX, GPRS, 3G and so on, in a convergent manner [1]. This white
paper is the contribution of the Media Delivery Platform (MDP) cluster and aims to cover the Networked
challenges of the Networked Media in the transition to the Future of the Internet.
Internet has evolved and changed the way we work and live. End users of the Internet have been confronted
with a bewildering range of media, services and applications and of technological innovations concerning
media formats, wireless networks, terminal types and capabilities. And there is little evidence that the pace
of this innovation is slowing. Today, over one billion of users access the Internet on regular basis, more
than 100 million users have downloaded at least one (multi)media file and over 47 millions of them do so
regularly, searching in more than 160 Exabytes1 of content. In the near future these numbers are expected
to exponentially rise. It is expected that the Internet content will be increased by at least a factor of 6, rising
to more than 990 Exabytes before 2012, fuelled mainly by the users themselves. Moreover, it is envisaged
that in a near- to mid-term future, the Internet will provide the means to share and distribute (new)
multimedia content and services with superior quality and striking flexibility, in a trusted and personalized
way, improving citizensâ quality of life, working conditions, edutainment and safety.
In this evolving environment, new transport protocols, new multimedia encoding schemes, cross-layer inthe
network adaptation, machine-to-machine communication (including RFIDs), rich 3D content as well as
community networks and the use of peer-to-peer (P2P) overlays are expected to generate new models of
interaction and cooperation, and be able to support enhanced perceived quality-of-experience (PQoE) and
innovative applications âon the moveâ, like virtual collaboration environments, personalised services/
media, virtual sport groups, on-line gaming, edutainment. In this context, the interaction with content
combined with interactive/multimedia search capabilities across distributed repositories, opportunistic P2P
networks and the dynamic adaptation to the characteristics of diverse mobile terminals are expected to
contribute towards such a vision.
Based on work that has taken place in a number of EC co-funded projects, in Framework Program 6 (FP6)
and Framework Program 7 (FP7), a group of experts and technology visionaries have voluntarily
contributed in this white paper aiming to describe the status, the state-of-the art, the challenges and the way
ahead in the area of Content Aware media delivery platforms
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Distributed virtual environment scalability and security
Distributed virtual environments (DVEs) have been an active area of research and engineering for more than 20 years. The most widely deployed DVEs are network games such as Quake, Halo, and World of Warcraft (WoW), with millions of users and billions of dollars in annual revenue. Deployed DVEs remain expensive centralized implementations despite significant research outlining ways to distribute DVE workloads.
This dissertation shows previous DVE research evaluations are inconsistent with deployed DVE needs. Assumptions about avatar movement and proximity - fundamental scale factors - do not match WoWâs workload, and likely the workload of other deployed DVEs. Alternate workload models are explored and preliminary conclusions presented. Using realistic workloads it is shown that a fully decentralized DVE cannot be deployed to todayâs consumers, regardless of its overhead.
Residential broadband speeds are improving, and this limitation will eventually disappear. When it does, appropriate security mechanisms will be a fundamental requirement for technology adoption.
A trusted auditing system (âCarbonâ) is presented which has good security, scalability, and resource characteristics for decentralized DVEs. When performing exhaustive auditing, Carbon adds 27% network overhead to a decentralized DVE with a WoW-like workload. This resource consumption can be reduced significantly, depending upon the DVEâs risk tolerance.
Finally, the Pairwise Random Protocol (PRP) is described. PRP enables adversaries to fairly resolve probabilistic activities, an ability missing from most decentralized DVE security proposals.
Thus, this dissertations contribution is to address two of the obstacles for deploying research on decentralized DVE architectures. First, lack of evidence that research results apply to existing DVEs. Second, the lack of security systems combining appropriate security guarantees with acceptable overhead
Operator-based approaches to harm minimisation in gambling: summary, review and future directions
In this report we give critical consideration to the nature and effectiveness of harm
minimisation in gambling. We identify gambling-related harm as both personal (e.g.,
health, wellbeing, relationships) and economic (e.g., financial) harm that occurs from
exceeding oneâs disposable income or disposable leisure time. We have elected to use the
term âharm minimisationâ as the most appropriate term for reducing the impact of
problem gambling, given its breadth in regard to the range of goals it seeks to achieve,
and the range of means by which they may be achieved.
The extent to which an employee can proactively identify a problem gambler in a
gambling venue is uncertain. Research suggests that indicators do exist, such as sessional
information (e.g., duration or frequency of play) and negative emotional responses to
gambling losses. However, the practical implications of requiring employees to identify
and interact with customers suspected of experiencing harm are questionable,
particularly as the employees may not possess the clinical intervention skills which may
be necessary. Based on emerging evidence, behavioural indicators identifiable in industryheld
data, could be used to identify customers experiencing harm. A programme of
research is underway in Great Britain and in other jurisdiction
Digital Inheritance in Web3: A Case Study of Soulbound Tokens and the Social Recovery Pallet within the Polkadot and Kusama Ecosystems
In recent years discussions centered around digital inheritance have
increased among social media users and across blockchain ecosystems. As a
result digital assets such as social media content cryptocurrencies and
non-fungible tokens have become increasingly valuable and widespread, leading
to the need for clear and secure mechanisms for transferring these assets upon
the testators death or incapacitation. This study proposes a framework for
digital inheritance using soulbound tokens and the social recovery pallet as a
use case in the Polkadot and Kusama blockchain networks. The findings discussed
within this study suggest that while soulbound tokens and the social recovery
pallet offer a promising solution for creating a digital inheritance plan the
findings also raise important considerations for testators digital executors
and developers. While further research is needed to fully understand the
potential impacts and risks of other technologies such as artificial
intelligence and quantum computing this study provides a primer for users to
begin planning a digital inheritance strategy and for developers to develop a
more intuitive solution.Comment: To be published in IEEE Acces
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