A Study of Routing Protocols for Ad-Hoc Network Based on Named Data Networking

電気通信大学202

Decoupling Information and Connectivity via Information-Centric Transport

The power of Information-Centric Networking architectures (ICNs) lies in their abstraction for communication --- the request for named data. This abstraction was popularized by the HyperText Transfer Protocol (HTTP) as an application-layer abstraction, and was extended by ICNs to also serve as their network-layer abstraction. In recent years, network mechanisms for ICNs, such as scalable name-based forwarding, named-data routing and in-network caching, have been widely explored and researched. However, to the best of our knowledge, the impact of this network abstraction on ICN applications has not been explored or well understood. The motivation of this dissertation is to address this research gap. Presumably, shifting from the IP\u27s channel abstraction, in which two endpoints must establish a channel to communicate, to the request for named data abstraction in ICNs, should simplify application mechanisms. This is not only because those mechanisms are no longer required to translate named-based requests to addresses of endpoints, but mainly because application mechanisms are no longer coupled with the connectivity characteristics of the channel. Hence, applications do not need to worry if there is a synchronous end-to-end path between two endpoints, or if a device along the path switches between concurrent interfaces for communication. Therefore, ICN architectures present a new and powerful promise to applications --- the freedom to stay in the information plane decoupled from connectivity. This dissertation shows that despite this powerful promise, the information and connectivity planes are presently coupled in today\u27s incarnations of leading ICNs by a core architectural component, the forwarding strategy. Therefore, this dissertation defines the role of forwarding strategies, and it introduces Information-Centric Transport (ICT) as a new architectural component that application developers can rely on if they want their application to be decoupled from connectivity. When discussing the role of ICT, we explain the importance of in-network transport mechanisms in ICNs, and we explore how those mechanisms can be scalable when generalized to provide broadly-applicable application needs. To illustrate our contribution concretely, we present three group communication abstractions that can evolve into ICTs: 1) Data synchronization of named data. This abstraction supports applications that want to maintain data consistency over time of a group\u27s shared dataset. 2) Push-like notifications for the latest named data. This abstraction supports applications that want to quickly notify and be notified about the latest content that was produced by a member(s) in the group. And 3) distributed named data fetching when the content is partitioned. This abstraction supports applications that their named data is partitioned and distributed in the group, and the names of content items in a partition cannot be generalized and hierarchically represented using one partition name. For each ICT, we provide examples of known applications that can use it, we discuss different mechanisms for implementation, and we evaluate selected implementations. We show how by relying on an ICT instead of a forwarding strategy, the tested applications can maintain sustainable communication in connectivities where IP tools fail or do not work well

Satellite Networks: Architectures, Applications, and Technologies

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As almost all human activities have been moved online due to the pandemic, novel robust and efficient approaches and further research have been in higher demand in the field of computer science and telecommunication. Therefore, this (reprint) book contains 13 high-quality papers presenting advancements in theoretical and practical aspects of computer recognition, pattern recognition, image processing and machine learning (shallow and deep), including, in particular, novel implementations of these techniques in the areas of modern telecommunications and cybersecurity

World Report 2015

Foreword World Report 2015 is Human Rights Watch's 25th annual review of human rights practices around the globe. It summarizes key human rights issues in more than 90 countries and territories worldwide, drawing on events from the end of 2013 through November 2014.The book is divided into two main parts: an essay section, and country-specific chapters

11th International Coral Reef Symposium Proceedings

A defining theme of the 11th International Coral Reef Symposium was that the news for coral reef ecosystems are far from encouraging. Climate change happens now much faster than in an ice-age transition, and coral reefs continue to suffer fever-high temperatures as well as sour ocean conditions. Corals may be falling behind, and there appears to be no special silver bullet remedy. Nevertheless, there are hopeful signs that we should not despair. Reef ecosystems respond vigorously to protective measures and alleviation of stress. For concerned scientists, managers, conservationists, stakeholders, students, and citizens, there is a great role to play in continuing to report on the extreme threat that climate change represents to earth’s natural systems. Urgent action is needed to reduce CO2 emissions. In the interim, we can and must buy time for coral reefs through increased protection from sewage, sediment, pollutants, overfishing, development, and other stressors, all of which we know can damage coral health. The time to act is now. The canary in the coral-coal mine is dead, but we still have time to save the miners. We need effective management rooted in solid interdisciplinary science and coupled with stakeholder buy in, working at local, regional, and international scales alongside global efforts to give reefs a chance.https://nsuworks.nova.edu/occ_icrs/1000/thumbnail.jp

2009 Annual Progress Report: DOE Hydrogen Program

This report summarizes the hydrogen and fuel cell R&D activities and accomplishments of the DOE Hydrogen Program for FY2009. It covers the program areas of hydrogen production and delivery; fuel cells; manufacturing; technology validation; safety, codes and standards; education; and systems analysis