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In this paper, cognitive secondary users (SUs) are taken into account to cooperate for messages information transmission without a data center using Belief Propagation — based framework (BP). We also exploit generalized belief propagation (GBP) to simulate individual marginal distribution of SUs in random topology networks with loops. Simulation results indicate that BP gives a substantial gain of...
Overlay network monitoring is one of the most important issues in the design and operation of overlay networks. It faced with increasing demand for better throughput and response time performance. Given an overlay network with n end hosts, existing systems either require O (n2) measurements, and thus lack scalability, or can only estimate the latency but not failures or congestion. We propose a scalable...
Fast-growing applications like streaming media make TCP a poor fit. Because the UDP protocol lacks congestion control, equation-based and AIMD-based congestion control schemes have been two promising alternative to TCP for real-time multimedia streaming over the Internet. Past studies have shown that they are able to maintain throughput smoothness and achieve reasonable fairness with competing TCP...
Opportunistic routing (OR) schemes, such as ExOR, have been shown to provide significant throughput gains over traditional best-path routing schemes for wireless networks. Though the performance of OR schemes depend on the bit-rate, they currently use a fixed rate for transmitting packets. While several schemes have been proposed for selecting bit-rate for unicast transmission to a single receiver,...
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