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In a P2P media streaming system, a centralized tracker server is always used to maintain the topology. However, sometimes the server becomes overloaded when too many clients are coming. Then, the response time is too long because of many frequent VCR operations and the tracker server cannot support large-scale users' requests. In this paper, a distributed tracker organization is designed to solve...
The existing trust models are not able to punish the concussive fraud in direct trust value and recommended trust value effectively. In the early stages of P2P networks, if some kinds of frauds are frequent in the meantime, the ability of trust model to prevent all the frauds is particularly important. To approve the trust model, first, referring to the idea of congestion control in computer network,...
In the current, the structured P2P-based time-shifted streaming system exist the problems that the copy of time-shifted streaming cannot be fully found and the maintenance costs are higher. For resolving the problems a structured P2P-based hierarchy search model for time-shifted streaming, namely Hier-DHT, is proposed. In Hier-DHT, the hierarchy is divided according to the first video block in the...
P2P reasoning system can answer queries from not only each peer's local theory but also some other peers related with sharing part of its vocabulary. This paper concentrates on P2P reasoning technology based on description logic, trying to provide an intelligent solution for searching network resources. A P2P reasoning algorithm suitable for description logic called DL-DeCA is proposed in this paper,...
Most of the existing trust models don't perform well in preventing malicious nodes from profiteering by conspiracy attack or periodic attack, and pay little attention to incentive mechanisms in the environment of Virtual Organization (VO). This paper proposes a new distributed trust mechanism in Single-core VO, which chooses the new node by Group-Choose mechanism that aggregates direct trust (Direct...
P2P e-commerce systems are commonly perceived as an environment offering both opportunities and threats. The existence of malicious peers could damage the correctness and availability of them. One way to minimize such threats is to use trust model to evaluate the trustworthiness of peers. This paper presents a dynamic self-adaptive trust model for p2p e-commerce system - AdaptTrust model, which involves...
Many real-world applications for sensor networks require event sampling with sufficient resolution over both spatial and temporal dimensions. When the deployed nodes are insufficient to fully cover the sensor field to satisfy this spatiotemporal sampling requirements of all events, nodes with intelligent mobility are crucial to improve the sampling quality. We measure the sampling quality using a...
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