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Cloud computing has become a popular high performance computing model to provide services over the Web. Meanwhile, enterprise cloud applications are attracting more research attention, which consists of a large scale of inter-connected computing nodes and virtualized computers distributed over multiple enterprise domains. Driven by the resource demand and less cooperation among applications, some...
Distributed Hash Tables (DHTs) have been deployed in a wide variety of peer-to-peer (P2P) networks. While the traditional use of P2P technology is focused around content sharing, the current trend is in applying the P2P technology for new application areas, such as interpersonal communications. Despite active research and standardization efforts, such as the development of Peer-to-Peer Session Initiation...
We analyze the performance of a DHT-based P2P overlay network in resource access and overlay maintenance activities. We use a cross-platform implementation of the protocol called P2PP. Mobile systems are the main target platform of our protocol implementation; due to practical reasons, we conduct large-scale evaluations using a server array. The performance metric is the request accomplishment success...
In this paper, the user experience in added value location-based mobile music service called the City Night Life (CNL) is evaluated and analyzed. The CNL service provides recommendations about entertainment premises in the proximity by matching their music styles with the user's personal music preferences. Entertainment premises are shown on a map interface and are marked with colors according to...
Community Coordinated Multimedia (CCM) empowers users' experiences through providing services of multimedia aggregation, delivery, sharing, and viewing within a community via the Internet. This paper approaches the CCM paradigm a step by designing and developing Digital Movie Guide (DMG) service for enhancing user's viewing experience. The DMG service prototype is implemented and demonstrated.
Pervasive Service Composition (PSC) incorporates service composition and pervasive computing into managing user's everyday activities. A generic Reference Model of Pervasive Service Composition (PSC-RM) is needed for guiding PSC architecture design and implementation. To design PSC-RM, we first investigate and present a user's generic activity model. Then we analyze characteristics of PSC and envision...
In this paper, we introduce and evaluate a community-based music voting service that relies on a DHT-based peer-to-peer network. Each community is created as a separate DHT overlay that is connected to a specific entertainment premise such as a cafeteria. A small-scale user testing was conducted in a laboratory environment to examine the attitudinal, social and perceived behavioral control factors...
Service composition combines two or more services from one or multiple parties over heterogeneous networks to achieve complex computational goals taking account of user requirements of reliability, adaptability, etc. Service composition provides a powerful approach of managing complex service activities in conventional B2B, C2C, and B2C application developments. This paper re-examines and formalizes...
The Digital Ecosystem (DE) initiative aims to encourage Small and Medium-sized Enterprises (SMEs) to collaborate with each other by make full use of the resources distributed in the network. The interconnection among the heterogeneous companies, users, and resources forms a complex and dynamic network environment. In the real-life applications, specific solutions are required for organizing the DE...
Although mobile devices are rich sources of context information, the distribution of context in mobile environments is often hindered by the limited battery life, and wireless connections with low bandwidth. In this paper, we present two different implementations that enable context distribution in mobile environments. The first solution relies on a presence service architecture and publish-subscribe...
A survey of mobile television technologies analyzes technical characteristics for each mobile TV solution, discusses specifications and standards, and presents possible future developments.
Peer-to-Peer (P2P) technologies have many advantages over traditional client/server technologies, including cost- effectiveness, scalability and robustness, due to their decentralized network structure. However, the performance has traditionally been an issue in P2P systems. Especially the higher lookup latencies, when compared with the traditional client/server systems, have been the bottleneck in...
Peer-to-peer service-oriented community coordinated multimedia (SCCM) is envisioned as a novel paradigm in which the user consumes multiple media through requesting multimedia-intensive Web services via diversity display devices, converged networks, and heterogeneous platforms within a virtual, open and collaborative community in context of a novel concept of multimedia applications as Web services...
Peer-to-peer service-oriented community coordinated multimedia (SCCM) is envisioned as a novel paradigm in which the user consumes multiple media through requesting multimedia-intensive Web services via diversity display devices, converged networks, and heterogeneous platforms within a virtual, open and collaborative community. In this paper, a generic P2P SCCM scenario is created and examined first...
Increasing heterogeneity of networks, services and applications emphasizes the need for middleware as an essential part of the information technology infrastructure. To implement novel 3G and beyond 3G mobile applications and services, the light-weight middleware utilizing application supernetworking- and hybrid peer-to-peer (P2P) - client/server concepts can be considered. Application supernetworking...
Community Coordinated Multimedia (CCM) provides an extended and enhanced human experience by collaboratively consuming electronic and networked content and multimedia-intensive services. Community coordinated multimedia vision raises the challenges of multimedia content creation, interpretation, exchange, and consumption over a large range of heterogeneous services, terminals and networks. The development...
The retrieval of context information is usually limited on a single user. Though some context subscription methods do exist, the mechanisms are not optimised for distributing context information concerning a group of users. This paper presents a context management system that utilises the presence service architecture and user communities on top of P2PSIP network. The system is based on existing IETF...
Interpersonal communication using the information networks can be accomplished in many different ways. Users may communicate, for example, by using a specific communication application on an end-user terminal, typical mobile phone, or IP Multimedia Subsystem (IMS) client. Quite often there is no interconnection mechanisms between these different communication methods, and this is emphasized with regards...
Collaborative usage of peer-to-peer and Web services has been recently paid a lot of attention. Proposed solutions, however, are mainly focused on enhancing service discovery by replacing centralized service registries with distributed peer-to-peer architectures. In this paper, we present a service environment that leverages collaboration of peer-to-peer and Web services further. Our service environment...
Community coordinated multimedia (CCM) envisions the paradigm of consuming multiple media via diversity display devices, converged networks, and heterogeneous platforms within a virtual, open and collaborative community. This paper applies service orientation approach and Web services technology to establish a Service-oriented CCM architecture (SCCM) for tackling requirements of scalability, discoverability,...
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