This document focuses on making off-the-shelf controllers applicable for high available electronic ship systems. The goal of such systems is to reduce a ship's downtime and the resulting damage that occur within c...
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ISBN:
(纸本)9789537044121
This document focuses on making off-the-shelf controllers applicable for high available electronic ship systems. The goal of such systems is to reduce a ship's downtime and the resulting damage that occur within conventional electronic ship systems. In detail a standardized communication middleware, called datadistribution Service (DDS), is used to build a fault tolerant system. After a short description of the standard, this article evolves an analysis showing that DDS can be used to build electronic ship systems out of general purpose controllers. On the one hand this is done by investigating the fault tolerant capabilities of DDS. On the other hand special attention is paid to proof that DDS can be used without constraint for any fault tolerant ship application. The analysis is completed by a maritime test set-up. At the end the advantages of using DDS are explained.
Collecting evidence of data that software systems produce and consume can provide critical information for reconstructing erratic behavior, tracing the origin of faults, and thus holding the responsible party accounta...
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ISBN:
(纸本)9798350339864
Collecting evidence of data that software systems produce and consume can provide critical information for reconstructing erratic behavior, tracing the origin of faults, and thus holding the responsible party accountable for particular consequences. However, when data propagates across trust boundaries with conflicting interests, they can be tempted to make evidence unprovable in order to avoid potential liability. Hence, we present a data propagation protocol that makes such attempts either detectable or ineffective by having data transfers witnessed by other network participants that collectively act as the prover for the data propagation process. The protocol builds an unstructured peer-to-peer overlay and is designed to disincentivize collusion among a malicious coalition of nodes by enforcing network participants to constantly exchange their partial views on the network in a random yet verifiable manner. A data producer or consumer who does not faithfully follow the protocol ends up having fewer witnesses from their side, making the network resistant to collusion with high probability. We derive the conditions under which this property holds and demonstrate the practicality and cost of our approach through the implementation of a distributed application built on top of the proposed protocol.
High-quality video transmission over wireless local area networks is one of the most challenging issues *** datadistribution Service (DDS) is a promising middleware that can be used for video distribution over *** ha...
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High-quality video transmission over wireless local area networks is one of the most challenging issues *** datadistribution Service (DDS) is a promising middleware that can be used for video distribution over *** has a rapid implementation in high-performance and mission-critical *** paper evaluates the performance parameters such as throughput and jitter when video transmission is introduced in a 802.11g networks using ***,it investigates the DDS QoSs that affects video streaming over WLANs which is important when deploying end-to-end video streaming services with quality of service guarantee.
High-quality video transmission over wireless local area networks is one of the most challenging issues nowadays. The datadistribution Service (DDS) is a promising middleware that can be used for video distributi...
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High-quality video transmission over wireless local area networks is one of the most challenging issues nowadays. The datadistribution Service (DDS) is a promising middleware that can be used for video distribution over VVLANs. DDS has a rapid implementation in high-performance and missioncritical networks. This paper evaluates the performance parameters such as throughput and jitter when video transmission is introduced in a 802.1 lg networks using DDS. Furthermore, it investigates the DDS QoSs that affects video streaming over WLANs which is important when deploying end-to-end video streaming services with quality of service guarantee.
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