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Today, overlay networks are used as a promising platform to deploy wide area of applications and services in the Internet. The application level state maintained by the overlay networks should have high degree of availability.This can be compromised when a significant percentage of overlay nodes fails simultaneously (massive failure). The first problem: when a significant fraction of nodes fails simultaneously...
P2P software bring convenient and pleasure to P2P users, but become a problem of ISP, because they produce huge traffic on network, especially on cross-network links, which increases financial burden on ISP. The reason partially comes from the fact that when P2P software build their overlay network, they ignore the underlying network topology, and select neighbors randomly, so most of the traffic...
P2P and SIP have its own advantages in media session establishment and transmission. A P2P-SIP based hierarchical architecture for real time stream media communication has been designed in this paper. In the hierarchical architecture, SIP is used to establish the media session, and P2P is adopted to maintain the overlay network architecture and transmit the stream media file. Because of the difference...
Peer-to-Peer Session Initiation Protocol (P2PSIP) is a new technology being standardized in the Internet engineering task force. A P2PSIP network consists of a collection of nodes organized in a peer-to-peer fashion for the purpose of enabling real-time communication using the Session Initiation Protocol (SIP). In this paper, we present experimental results obtained by running a P2PSIP prototype in...
Environmental sensing is seen as key to understanding the physical processes that affect our lives. The collection of such data is used to enhance the decision making processes of governments, organizations and society as a whole in their future interactions with the planet. In order to be able to generate a global picture of the effects a physical phenomenon may have it is necessary to generate a...
This paper proposes a novel recovery mechanism from large-scale network failures caused by earthquakes, terrorist attacks, large-scale power outages and software bugs. Our method, which takes advantage of overlay networking technologies, pre-calculates multiple routing configurations to prevent possible simultaneous network failures and selects one configuration immediately after detecting the failures...
Peer-to-Peer (P2P) networks risen as a promising approach to provide large-scale VOD services over the Internet for their potential scalability. Since videos are typically large in volume and require high communication bandwidth for delivery, many peers are unwilling to cache them in whole for serving others. In this paper, we propose a new time-based cache management on peers and a peer clustering...
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