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The following topics are dealt with: local computer networks; peer-to-peer systems; mesh and optical networks; sensor networks; energy awareness; routing; performance analysis; security; link layer; IEEE 802.11 system; design optimization; and resource management.
This talk introduces GENI, the National Science Foundation's ambitious plan to build a national infrastructure suite to enable research into Network Science and Engineering for future global communications networks. GENI has just entered Spiral 1, a new stage in its development. Early prototyping is now beginning, which will offer illumination into its construction plans and research potential. The...
Peer-to-peer technology has impacted a wide range of distributed systems beyond simple file-sharing. Distributed XML databases, distributed computing, server-less Web publishing and networked resource/service sharing are only a few to name. Despite the diversity in applications, these systems share a common problem regarding searching and discovery of information. This commonality stems from transitory...
This paper analyzes the potential of cooperative proxy caching for peer-to-peer (P2P) traffic as a means to ease the burden imposed by P2P traffic on Internet service providers (ISPs). In particular, we propose two models for cooperative caching of P2P traffic. The first model enables cooperation among caches that belong to different autonomous systems (ASes), while the second considers cooperation...
We compare two representative streaming systems using mesh-based and multiple tree-based overlay routing through deployments on the PlanetLab wide-area experimentation platform. To the best of our knowledge, this is the first study to compare streaming overlay architectures in real Internet settings, considering not only intuitive aspects such as scalability and performance under churn, but also less...
Structured Peer-to-Peer (P2P) systems are highly scalable, self-organizing, and support efficient lookups. Furthermore, Distributed Hash Tables (DHTs), due to their features, are used more and more for file-sharing and content distribution applications. However, a major weakness of traditional DHTs is the search for stored content, as data is assigned to nodes based on hash functions, and the very...
Distributed interactive applications may have stringent latency requirements and dynamic user groups. These applications may benefit from a group communication system, and to improve the system support for such applications, we investigate graph algorithms that construct low-latency overlay networks for application-layer multicast. In particular, we focus on reducing the diameter and the pair-wise...
The demand for wireless networks which provide high bandwidth and access to the Internet continues. In recent years, a new class of networks which fulfill these requirements evolved, wireless mesh networks (WMNs). Although WMNs satisfy the demand for high bandwidth and Internet access, there is a further, fundamental factor of success: the simple use. Except for small networks, manual configuration...
Hybrid Wireless Mesh Protocol (HWMP) in IEEE 802.11s provides two routing modes, on-demand and proactive, for WLAN mesh networks. Although the on-demand routing mode always provides the optimum routing paths for data transmission, the initial latency can be very high when communicating with a destination in an external network. On the other hand, the proactive routing mode shows low initial latency...
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