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Heterogeneity among users is the main concern in building the unstructured P2P topology. However, the related algorithms either only pay attention to the weight heterogeneity in hitting the queries to improve the search success rate, or think much of the capability heterogeneity in data transmission to achieve load-balancing or high throughput. Because the search and transmission are two inseparable...
Replication is a widely used technique in unstructured overlays to improve the content availability or the system performance. Among the prior work on replication, a fundamental question is often addressed: how many replicas should be kept for each data item if given the fixed request rates and the limited storage capability? The Square-Root Replication, in which the replica number of an item is proportional...
The requirement for supporting DVD-like functions raises new challenges to the design of P2P VoD systems. The uncertainty of frequent user DVD-like interactivity makes it difficult to ensure user perceived Quality of Experience (QoE) for real-time streaming services over distributed self-organized P2P overlay networks. Most existing solutions are based on the unreasonable assumption that all the users...
Supporting free VCR-like operations in P2P VoD streaming systems is challenging. The uncertainty of frequent VCR operations makes it difficult to provide high quality realtime streaming services over distributed self-organized P2P overlay networks. Recently, prefetching has emerged as a promising approach to smooth the streaming quality. However, how to efficiently and effectively prefetch suitable...
Supporting user interactivity in peer-to-peer streaming systems is challenging. VCR-like operations, such as random seek, pause, fast forward and rewind, require timely P2P overlay topology adjustment and appropriate bandwidth resource re-allocation. If not handled properly, the dynamics caused by user interactivity may severely deteriorate users' perceived video quality, e.g., longer start-up delay,...
Peer-to-Peer (P2P) technology has been widely applied in today's Internet. Unstructured P2P systems, where peers connect with each other to form dynamic, flexible and scalable networks, are commonly used for resource sharing. Resource location in unstructured P2P systems tends to use "blind search" strategies (i.e. flooding and random walk) for its simplicity and low maintenance cost. However,...
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