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In the literature, asymptotic studies of multihop wireless network capacity often consider only centralized and deterministic time-division multiple-access (TDMA) coordination schemes. There have been fewer studies of the asymptotic capacity of large-scale wireless networks based on carrier-sensing multiple access (CSMA), which schedules transmissions in a distributed and random manner. With the rapid...
By allowing routers to randomly mix the information content in packets before forwarding them, network coding can maximize network throughput in a distributed manner with low complexity. However, such mixing also renders the transmission vulnerable to pollution attacks, where a malicious node injects corrupted packets into the information flow. In a worst case scenario, a single corrupted packet can...
Cascaded optical code label and its en/decoder based on fiber Bragg grating are proposed and experimentally demonstrated. Then all-optical routing can be realized in OPS networks without label erasing, label reinsertion or table lookup operation.
We consider multi-rate peer-to-peer multi-party conferencing applications, where different receivers in the same group can receive videos at different rates using, for example, scalable layered coding. The quality of video received by each receiver can be modeled as a concave utility function of the video rate. We study and address the unique challenges introduced by multi-rate setting as compared...
We consider multi-source multicast communication scenarios in which each node has an aggregate outbound traffic capacity and can directly communicate with any other node. This is motivated by peer-to-peer (P2P) information dissemination applications on the Internet in which the uplink capacity of nodes is usually the bottleneck, being several times smaller than the downlink capacity. We also allow...
In this paper, we study the problem of utility maximization in peer-to-peer (P2P) systems, in which aggregate utilities are maximized by running distributed algorithms on P2P nodes that are constrained by their uplink capacities. This may be understood as extending the seminal flow control framework in (F. P. Kelly et al., 1998) and (S. H. Low et al.,1999) from single-path unicast over general topology...
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