Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"Opportunistic routing"”.
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Opportunistic routing in multi-hop wireless networks
This thesis describes ExOR, an integrated routing and MAC protocol for bulk transfers in multi-hop wireless networks. ExOR exploits the broadcast nature of radios by making forwarding decisions based on which nodes receive each transmission. The spatial diversity among receivers provides each …
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Trading structure for randomness in wireless opportunistic routing
Opportunistic routing is a recent technique that achieves high throughput in the face of lossy wireless links. The current opportunistic routing protocol, ExOR, ties the MAC with routing, imposing a strict schedule on routers' access to the medium. Although the scheduler delivers opportunistic …
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An Opportunistic Routing Protocol Design for Wireless Networks: A Physical Layer Perspective
… of networking evolution. Efficient and reliable routing of data from the source to destination with minimal power consumption remains the crux of the research problem. Fading mechanisms inherent in wireless communications can impact the packet routing mechanisms in these types of networks. In …
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Benefits of opportunistic routing, implicit acknowledgments, and network coding on a linear broadcast network
This thesis studies the benefits of using opportunistic routing, implicit acknowledgments, and network coding on a linear broadcast packet network. Nodes are arranged in a line, and the first node wishes to communicate with the end node. When node i transmits, it is received at node j with a …
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Measurement and analysis of real-world 802.11 mesh networks
… of SNR-based bit rate adaptation, the impact of opportunistic routing, and the prevalence of hidden terminals. The size and diversity of our data set allow us to analyze claims previously only made in small-scale studies. In particular, we find that the SNR of a link is a good indicator of the …
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Prediction-enhanced Routing in Disruption-tolerant Satellite Networks
… DTN (Delay-/Disruption-Tolerant Networking) routing in dynamic LEO satellite constellations based on the prediction of contacts. The solution is developed with a clear focus on the requirements imposed by the 'Ring Road' use case, mandating a concept for dynamic contact prediction and its …
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The application of network coding to multicast routing in wireless networks
… considers the application of network coding and opportunistic routing to improve the performance of multicast flows in wireless networks. Network coding allows routers to randomly mix packets before forwarding them. This randomness ensures that routers that hear the same transmission are unlikely …
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Optimal forwarding in wireless networks: opportunistic network coding
… Two of the most important such methods are opportunistic routing (OR) and wireless network coding (NC), exemplified by the ExOR and COPE protocols, respectively. This thesis presents study of jointly optimizing packet delivery (in terms of reducing transmissions) of forwarding schemes in …
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Towards efficacy and efficiency in sparse delay tolerant networks
… model multi-hop relationships and to make opportunistic routing decisions for interest-annotated messages. Second, the ChitChat system is hybridized [70] to consider both social context and geographic information for learning the social semantics of locations so as to identify worthwhile …
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Low-latency network coding for streaming video multicast
… and transparently apply network coding and opportunistic routing to video multicast in a wireless mesh. We devise VSSIM*, an improved video quality metric based on [46]. Our metric addresses a significant limitation of prior art and allows us to evaluate video with streaming errors like …
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Privacy Preserving on Delay Tolerant Networks
… to Delay-Tolerant Networks often focus on routing performances, energy consumption or quality of service. Despite the fact privacy related issues are generally considered critical, they do not arouse the same interest as the other reported aspects. For instance, when the carried information …
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Local network coding on packet erasure channels -- From Shannon capacity to stability region
… P2P file system from Microsoft, the MORE routing protocol, and the COPE coding architecture from MIT have implemented the idea of NC and exhibited promising performance improvements, a significant part of the success of NC stems from the continuing theoretic development of NC capacity, …