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With the rapid development of the Internet, especially in recent years, the development of mobile Internet is increasingly rapid. Message push, which is an important way for mobile client to publish information and make communication, plays a significant role in mobile Internet. MQTT protocol is one of the implementation technologies of message push in Android system with low power consumption and...
Balancing load among servers is an important research challenge for a large-scale loosely coupled heterogeneous server system (LCHSS), to improve both the total throughput of the system and the quality of service experienced by clients. In practical terms, a load-balancing method for an LCHSS have to drive servers to underloaded states without unnecessary load migrations among servers. To tackle this...
The portion of video traffic in the total amount of Internet traffic has been increased. As the number of users and volume of content are increased, the content providers had been suffered for processing and transferring media and they have adopt CDN technology into their service so that their burden can be alleviated. The CDN technology can be classified into three different types; ‘server farm CDN’,...
Bandwidth demanding P2P (Peer-to-Peer) overlay communications strongly require scalable and differentiated provisioning of network resources (e.g., bandwidth, communication paths) to enable a seamless convergence over the Internet. Recent research efforts claimed that efficient resource over-provisioning (booking more resources in advance) allows differentiation of control with reduced signalling...
Existing parallel file systems are unable to differentiate I/Os requests from concurrent applications and meet per-application bandwidth requirements. This limitation prevents applications from meeting their desired Quality of Service (QoS) as high-performance computing (HPC) systems continue to scale up. This paper presents vPFS, a new solution to address this challenge through a bandwidth virtualization...
The support for mobility is a major requirement for the next Internet. Although several mobility solutions are proposed, none of them has been largely deployed, due to various impediments, among which, non being economically viable, we believe is the principal one. We propose a business oriented mobility framework - Mobility Support Service (MSS), that will facilitate mobility on the Internet. MSS...
The IMS (IP Multimedia Subsystem) network as a new generation suffers of traditional Internet problems such as managing and monitoring QoS which have a direct impact on the the operator's revenue streams. Among solutions proposed, the eTOM (enhanced Telecom Operations Map) published by the TM Forum and 3GPP specifications will be sufficient to describe a system for monitoring and managing QoS. Moreover,...
In networked real-time games such as First Person Shooting (FPS) through a network which does not guarantee the Quality of Service (QoS), the consistency and fairness among players may be disturbed owing to network delay and jitter. To keep the consistency and fairness high, this paper carries out group synchronization control, which adjusts the output timing among multiple terminals. However, the...
Rich media application enables plenty of interactive, information-rich services to enhance end user's viewing experience. In current standards released for such service, only one rendering space is defined to handle multiple types of content belonging to the same service. However, a new trend is to assign more than one terminal device to render rich media application in a cooperative way inside a...
Current work presents the tool COMPOSITOR (supported by FEDER TIN2008-05932) which has been developed for connectors generation. Generated connectors implement the coordination and composition model presented by authors in [1]. This model is based on using a connector defined by the client of a server component which uses contracts to set the non-functional requirements wanted, such as quality of...
Quality of Service (QoS) is still one of the major challenges for emerging services based on the Real-Time Transport Protocol (RTP) to deliver multimedia content. In the context of the Internet Protocol Television (IPTV) services, the synchronization of multimedia components plays an important role. In order to synchronize audio and video components of multimedia content, RTP timestamps have to be...
Due to low hardware costs, availability of unlicensed spectrums and support of mobility, WLANs have been widely adopted in home, enterprise, hospital, and campus environments. These networks are used for various purposes including VOIP, data services and inventory management. The QoS in WLANs may be degraded due to a number of reasons such as environment changes, hidden terminals, and asymmetric relationships...
3D teleimmersive (TI) environments have gained significant attention as they show promising results for a wide number of applications. These environments are usually distributed and multi platform which makes performance analysis and monitoring difficult. We present a unified time service (UTS) and its measurement framework for evaluating components in terms of their reflected QoS (e.g. delay). Then...
Web services (WSs) are becoming increasingly popular because of their potential in several application domains including e-Enterprise, e-Business, e-Government, and e-Science. Based on open XML standards, WS technology allows the construction of massively distributed and loosely coupled applications. A service composition mechanism should satisfy not only functional properties but also non-functional...
As a network administrator or as a client, we need to perform the important operation over network such fixing a schedule of video conference, sending data, or doing maintenance related task regarding Quality of Service (QoS). It will be more reliable if we can get the information of the delay, performance statistics and error rate of the overall network that we belong to or we are maintaining. We...
Recently, Skype has been receiving considerable attention as a peer-to-peer (P2P) Internet telephony application. In Skype, a voice connection is established via super nodes chosen from among ordinary end-user nodes. User information such as an IP address and port number of an online Skype node is managed by super nodes in a decentralized manner where the number of super nodes changes dynamically...
High volume database-driven e-commerce applications demand a cluster-based infrastructure to offers high availability, scalability and fault tolerance. The current J2EE architecture and containers restrict the transparent deployment of applications over database clusters without engineering data access logic into the applications. Our work extends the J2EE architecture to allow transparent deployment...
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