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This paper presents the benefits and drawbacks of mobile desktop search coupled with cloud-assisted operations, such as operation offloading, cloud storage, and cloud-assisted search. The energy trade-off when offloading a task is analyzed and measured in several different scenarios. An example case of offloading indexing is presented. The problem of cloud-assisted mobile desktop search is introduced...
The fundamental P2P principle that downloading peers help other peers can be applied in the context of video-on-demand. This represents a demanding application combining aspects of other well-known P2P applications, i.e., live streaming and traditional file sharing. We seek to provide insight on fundamental questions about the performance and scalability of the system. A deterministic fluid model...
In a segmented peer-to-peer video-on-demand system the video file is split into a number of segments and the downloading of the video file proceeds in a more or less sequential manner from one segment to another (i.e., in stages). We present an analytical fluid model for such systems. Notably, for this model we derive an explicit condition when the system has a unique positive steady-state solution...
Home networks are an increasingly popular platforms for the deployment of ICT solutions for common people. Universal Plug-and-Play has enabled the seamless connection of different home appliances and the services they offer. However, interconnecting home networks, e.g. among friends, in a way that is flexible, easy to deploy and use, and yet well controllable still remains a challenge. This paper...
Maximizing network throughput is one of the main objectives in wireless multi-hop networks. However, small link bandwidth and severe interference become two great obstacles in network throughput improvement. Single route always encounters great congestion, especially for multiple flows with the same source and destination. Multi-path routing can solve the bandwidth shortage issue to some extent, but...
Identity federation is a key requirement for today's distributed services. This technology allows managed sharing of users' identity information between identity providers (IDP), and subsequently, the use of federated identities to access service providers (SP). Single sign-on (SSO) is a core feature provided by these systems. The Session Initiation Protocol (SIP) is a signaling framework for session...
In this paper we present findings from our windowing BitTorrent simulations and show that by carefully optimizing other factors a reasonable level of performance can be achieved while leaving the original BitTorrent tit-for-tat mechanism intact. We compare the previously proposed windowing piece selection algorithms for BitTorrent and propose a new one, called the stretching window algorithm. We also...
Scalability and efficient global search in unstructured peer-to-peer overlays have been extensively studied in the literature. The global search comes at the expense of local interactions between peers. Most of the unstructured peer-to-peer overlays do not provide any performance guarantee. In this work we propose a novel Quality of Service enabled lookup for unstructured peer-to-peer overlays that...
The paper presents an association rule mining based learning approach for multimodal user interface adaptation in mobile environments. High-level knowledge about user preferences in multimodal interaction is inferred, using data mining techniques based on context parameters of the environment. The current approach facilitates automatic selection of multimodality capable interaction devices and their...
In this paper we present the temporal subspace routing (TSR) technique for peer-to-peer environments that allows transparent exchange of information defined using metadata and queries based on user interests. The system unifies generic semantic matching, routing, caching, and access control. The technique supports continuous queries that are matched against metadata profiles of remote resources. Both...
In the wireless world there has been much interest in alternate serialization formats for XML data, mostly driven by the weak capabilities of both devices and networks. However, an alternate serialization format is not easily made compatible with XML security features such as encryption and signing. We consider here ways to integrate an alternate format with security, and present a solution that we...
In this paper, we present a summary of our experiences with mobile middleware research in the four-year Fuego Core project. The presented work focuses on data communication and synchronization. We present three middleware services for data communication and synchronization, namely the messaging, event, and file synchronizer services, and discuss their development and usage. We conclude with an integrated...
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