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To provide live streaming service to mobile users, traditionally each user pulls content from a server over his cellular network. In order to overcome the scalability problem of last-hop bandwidth bottleneck, mobile peer-to-peer (P2P) streaming can be used where mobile devices relay their stream received in a multi-hop manner by means of a secondary channel (such as Wi-Fi or bluetooth). We investigate...
Service composition is a useful technology to achieve dynamic requests. But in cloud, the cloud provider should guarantee the QoS of the user request as well. Previous work investigated how to select proper available replicas (the similar functional services located on different physical nodes) to effectively achieve the composite services. However, as the requirements for some service grow, even...
P2P communities are online communities of entities which offer services to each other without a central administration. Community members that need a specific service have to choose the transaction partner which they believe that will provide them with a required service of the expected quality, thus, they need mechanisms to support trust decisions regarding who they will transact with. P2P reputation...
In service-oriented environments (e.g. Cloud Computing or Utility Computing), automated service discovery is crucial to enable self-organizing technical components that are able to discover and consume services autonomously. To this end, precise and robust service discovery algorithms are desirable. In this paper, we propose an approach combining both syntactic and semantic search to increase accuracy...
How to assess the topology vulnerability of a network has attracted more and more attentions recently. Due to the rapid growing number of real- time internet applications developed since the last decade, the discovery of topology weakness related to its quality of service (QoS) is of more interest. In this paper, we provide a novel QoS-aware measurement for assessing the vulnerability of general network...
In this paper we focus on building low latency resource location service over unstructured Peer-to-Peer (P2P) networks. In state-of-the-art search approaches in unstructured P2P systems ,they often evaluate efficiency by overlay hops, while two nodes logically adjacent maybe physically far away and from user's QoS, clients always want to acquire as many as objects in a short time, so we propose an...
The NP-hard QoS Multicast Routing (QoSMR) is one of the most challenging problems in recent networks. In this paper, we investigate the QoSMR problem as well as its different existing formulations. We analyze the limitations of these formulations and propose a novel one. The main advantage of our formulation is that it considers not only the quality of the multicast subgraph formed by the computed...
Channel assignment schemes in Multi-Radio Wireless Mesh Networks (MR-WMNs) usually leave several links sharing the same channel within overlapped transmissions or interference ranges; this is especially true when only one radio is used or when the number of radios is very small compared to the number of orthogonal channels. In order to further improve MR-WMN performance, especially for mobile multimedia...
The Hybrid CDN-P2P architecture, or HCDN, which combines the complementary advantages of CDN and P2P networks, has been proposed to reduce the deployment cost and to improve the quality of service in file sharing and video streaming applications. A replica placement algorithm (RPA) decides where to replicate the specific data. Existing RPAs for pure CDN do not work efficiently in the HCDN architecture...
Quality of service routing (QoSR) is a routing mechanism based on the data flow request and available network resources. Generally in information communication a Dijkstra algorithm for traditional uni-cast network transmission was adopted to calculate the shortest path of a peer-to-peer routing. Based on an improved Dijkstra algorithm for dynamic and realtime transmission on WAN, the QoS routing algorithm...
Distributed Virtual Environment (DVE) has attracted much attentions in recent years due to the rapid advances in the areas of E-learning, Internet gaming, human-computer interfaces, and etc. Meanwhile, in recent years, the emergence of Service Oriented Architecture (SOA) provides a more flexible and inter-operable framework for building more advanced DVE based applications. In such a background, service...
According to several studies, the power consumption of the Internet accounts for up to 10% of the worldwide energy consumption, and several initiatives are being put into place to reduce the power consumption of the ICT sector in general. To this goal, we propose a novel approach to switch off network nodes and links while still guaranteeing full connectivity and maximum link utilization. After showing...
By studying the existing P2P tree models, a new RTCP-based P2P algorithm, LrstP2P, is proposed to boost the controllable QoS mechanism of the large-volume realtime streaming media transport. This algorithm has three layers: RTCP feedback, RTCP listening and parent choice. The LrstP2P enhances the availability of the parent choice strategy for the joining users, improves the self-administration to...
In this paper, we propose the EDCA-TM, a new architecture which tunes the enhanced distributed channel access (EDCA) for multi-hop networks. In EDCA-TM, we suggest a new module for dynamic access category adaptation (DACA) over the existing channel access mechanism such as EDCA. It processes received data packets for assigning an appropriate access categories (AC) to provide delay and rate guarantee...
In this paper, we revisit the problem of multicast tree construction in overlay peer-to-peer networks. We present an iterative online multicast tree construction algorithm for multi-session multicasting of elastic content. Our framework allows receivers to request multiple sessions from possibly different servers. Each receiver expresses a quality-of-service requirement using a utility function. We...
Membership service is an essential problem in peer-to-peer (P2P) networks since many p2p applications such as media broadcasting and content distribution require a high performance overlay structure to deliver satisfying quality of service (QoS). The speed a peer locating a good neighbor can greatly affect the QoS of the application running on that peer. In this paper, we present a new mesh-based...
Nowadays there is a tremendous debate about the treatment required for managing the heavily loaded and expanding traffic demands. Building a universal communication system is extremely challenging, given the lack of scalable communication technologies. Researchers have recently been seeking for solutions and expansions for the existing networking models; they have been focusing on optimizing the use...
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