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Delay Tolerant Networking (DTN) has been proposed as a global overlay architecture to provide network connectivity in challenged environments such as deep-space communications field. Bundle Protocol along with its convergence layer protocols transform end-to-end reliability into questionable hop-by-hop reliable communication and imposes a two-tier routing policy that allows flexible routes only within...
Our goal is to maintain 1+1 path protection as much as possible after a single failure occurs for ensuring carrier-grade reliability. An obvious approach is preparing a third path that is disjoint with the primary and backup paths, but applicability to actual networks with this approach is extremely restricted. From our evaluation, the recovery ratio for reconstructing 1+1 path protection decreases...
One-to-many (Downstream) transport in wireless sensor networks is illustrated by single node (sink) sending information to a number of sensor nodes. These nodes can be thrown or scattered randomly in the sensor field. Therefore, the topology i.e., density and node arrangement, can be unpredictable in different regions. In this work, we present a new Topology-based Efficient Downstream Communication...
Underwater wireless sensor networks (UWSNs) are prone to message loss due to their poor link condition with high bit error rate (BER). Retransmission-based mechanisms such as ARQ can be used for the reliability, however, they are not suitable for UWSNs due to the inherent long propagation delay of UWSNs. Therefore, a forward error correction (FEC) mechanism might be an alternative in order to guarantee...
This paper outlines an instance of frequency, time and data networks convergence based on Ethernet technology which can be utilized in smart grid in a cost effective manner. The basic components of this converge network are Ethernet transport, rapid spanning tree protocol (RSTP), synchronous Ethernet and precision time protocol version 2 (PTPv2). RSTP provides loop-free active network topology. Synchronous...
Underwater acoustic communication networking is an innovative area, which faces difficult medium problems, such as long propagation time and dynamic network topology. Our challenge is to develop a MAC protocol which provides a stable and efficient underwater acoustic network for a system with high message rate. In previous work, a TDMA based algorithm was implemented and tested in various sea trials...
Flooding is a mechanism that distributes packets to every node of the network. The flooding mechanism is frequently used in many operations in wireless multi-hop networks. Since flooding exploits hop-by-hop broadcasting that suffers from unreliable transmission and fading, it is hard to achieve the reliability in flooding. As unreliable flooding may lead to a coverage hole, it will have a negative...
Proactive routing protocols are mainly used in mobile networks since they are capable to distribute recent information very quickly. However, even reactive and hybrid protocols can be modified to achieve high end-to-end reliability in mobile networks while not increasing the end-to-end delay in a significant way. In this paper the performance of ad-hoc on-demand distance vector (AODV), optimized link...
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