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Aiming at a practical industrial network control system, this paper makes an analysis of types of data, their traffic and directions under different working conditions, and a selection of a link of maximum traffic as a typical one. The method of passive measurement is used to obtain the packets of different protocols passing through the link. The traffic of the corresponding protocols can be calculated...
In order to reduce the cost and acquire the microsecond-level time synchronization, this paper has proposed the DF-NTP (Double filter NTP) and analyzed the algorithm of NTP (network time protocol) and the causes of synchronization error. The precision of time synchronization can be raised through filtrating the delay in the forward-backward path and reducing the influence of uncertain delay. The experimental...
The concept of concurrent signatures was introduced by Chen et al. in Eurocrypt 2004 which allows two entities to produce two signatures in such a way that, the signer of each signature is ambiguous from any third party??s point of view until the release of a secret, known as the keystone. Once the keystone is released, both signatures become binding to their respective signers concurrently. In the...
According to the features of wireless sensor network for Greenhouse, Mobile agent model has more advantages than the traditional model in data fusion. The sequence and the quantity of the nodes the MA visit have a significant impact on the efficiency, reliability and life of the wireless sensor network in the MA based model for data fusion. This paper proposes a framework for mobile agents based data...
In this paper, the monitoring module of the integrated power system (IPS) in a ship was discussed, with traditional monitoring methods and their shortcomings analyzed briefly. We designed a hybrid network to optimize the monitoring system of the IPS, which could reduce cables laid in the jamming rooms, manage the topology conveniently, raise the communication efficiency, and make the installation,...
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