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 9 of 9 for “"Erasure Codes"”.
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On the use of erasure codes in unreliable data networks
… messages by using a coding technique known as an erasure correcting code. We develop a model of the network and present an analysis of the system that invokes the Central Limit Theorem to approximate the total number of bits received from all the paths. We then optimize the number of bits to send …
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Close-form and matrix en/decoding evaluation on Different Erasure Codes
Erasure code, often applied in disk-array distributed le system, is a technique to protect data in case there are some accidental failures in the system. Nowadays, as customers require higher reliability for their data, RAID6, which at most protect double failures in disk-array, is not sucient any …
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Hyfs: design and implementation of a reliable file system
… this dissertation, we propose to employ general erasure codes to build a reliable file system, called HyFS. HyFS is a cluster system, which can aggregate distributed storage servers to provide reliable data service. On client side, HyFS is implemented as a native file system so that applications …
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Coding techniques for multicasting
… over block fading channels, using rateless erasure codes at the application layer. This architecture provides new insights into the cross layer interaction between the physical layer and the application layer. For systems with rich time diversity, we observe that it is better to exploit the …
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Sandooq: improving the communication cost and service latency for a multi-user erasure-coded geo-distributed cloud environment
… and disasters. They are also increasingly using erasure codes to improve the reliability at a much lower storage cost. In addition to reliability, the clients and applications also demand storage solutions with better performance and cost-effectiveness. For a geo-distributed data center, a major …
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Efficient redundancy techniques to reduce delay in Cloud systems
… to analyze the delay in accessing an (n, k) erasure-coded storage system. This analysis provides practical insights into how many users can access a piece of content simultaneously, and how fast they can be served. Achieving low latency is even more challenging in streaming communication …
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Exponential bounds on error probability with Feedback
… be increased by feedback. For fixed length block codes even the decay rate of error probability with block length does not increase with feedback for most channel models. Consequently for making the physical layer more reliable for higher layers one needs go beyond the framework of fixed length …
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On playback delay in streaming communication
… playback delay in streaming over a packet erasure channel with fixed bandwidth. In recent years, there has been a rapid increase in live streaming applications where packets have to be played back at the receiver in order. With instantaneous feedback, the automatic-repeat-request (ARQ) …
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Coding and scheduling in networks for erasures and broadcast
… related issues in communication networks, namely erasures and broadcast. Erasures are an appropriate model for communication channels from a network layer perspective. A class of efficient and flexible codes known as fountain codes, is available to deal with erasures for the basic erasure channel. …