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The need of developing reliable industrial automation networks has increased to a great extent due to the transmission of hard real time control packets over error prone wireless channels. This paper focuses on error control approaches to satisfy strict reliability requirements of industrial automation control applications. In this paper, some of the state of art error control approaches are critically...
A communication satellite consists of subsystems which are functioning together to form a whole system. All subsystems consist of thousands of components and there is no possibility of repair once the satellite launched into orbit. Therefore, the necessity of high reliability becomes a rule rather than an exception. TUSAT (Turkish National Communication Satellite) is planned to have both C and Ku...
In extremely low-duty-cycle wireless sensor networks, a sender has to wait for a certain period of time to forward a packet until its receiver becomes active, which will result in longer end-to-end delay than ever. Many works have been done to improve delivery ratio but lack of the consideration on energy efficient delivery delay. In addition, unreliable links is another challenge in wireless sensor...
Unequal protection mechanisms have been proposed at several layers in order to improve the reliability of multimedia contents, especially for video data. The paper aims at implementing a multi-layer unequal protection scheme, which is based on a Physical-Transport-Application cross-layer design. Hierarchical Modulation, in the physical layer, has been demonstrated to increase the overall user capacity...
Improvements in emerging practical network coding methods, such as multi-generation Mixing (MGM), can be attributed to two arguably independent factors: (1) An intrinsic factor that is due to the cooperation among intermediate (propagating) nodes in mixing traffic received through multiple routing paths. (2) An extrinsic factor that is due to the level of reliability provided by network coding from...
To improve the efficiency of reliable broadcast/multicast MAC protocol in wireless multi-hop network, a location aid algorithm to eliminate redundant nodes was brought forward. Using the neighbor geographical location information, according to the principle of equivalent collision region, the algorithm could reduce redundant nodes from receivers, which is unnecessary for acknowledgement. Thus, the...
Delay Tolerant Networking (DTN) is currently an open research area following the interest of space companies in the deployment of Internet protocols for the space Internet. Thus, these last years have seen an increase in the number of DTN protocol proposals such as Saratoga or LTP-T. However, the goal of these protocols are more to send much error-free data during a short contact time rather than...
This paper describes a methodology for building a reliable internet core router that considers the vulnerability of its electronic components to single event upset (SEU). It begins with a set of meaningful system level metrics that can be related to product reliability requirements. A specification is then defined that can be effectively used during the system architecture, silicon and software design...
Distributed video coding (DVC) technology is investigated and payed more and more attentions in wireless video applications because of characteristics of its encoder with low-complexity and decoder with high-complexity. Its coding types can be sorted the key and Wyner-Ziv frames, key frames are with conventional intra-coding mode, Wyner-Ziv frames are coded by an encoder that is composed of quantizer...
In this paper, we consider three different H-ARQ methods supported in IEEE 802.16 physical layer. One advantage of IEEE 802.16e system is providing useful feed-back information thus we can exploit it to modify the basic H-ARQ algorithm. Here, the comparison of the Chase combining and incremental redundancy mechanism was shown and discussed. The amending of the hybrid of the two schemes was also proposed...
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