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This paper addresses reliability of data dissemination applications when there are severe disruptions to the underlying physical infrastructure. Such massive simultaneous physical failures can happen during the geographical events such as natural disasters (earthquakes, floods, tornados) or sudden power outages - infrastructure failures in these cases are geographically correlated. In particular,...
Due to the mobility of nodes, servers and clients, the reliability of service delivery over MANETs is a major concern. Traditional route discovery based method is to predict and detect breakdown of connectivity and try to find an alternative path from the client to the same server (We call it traditional rerouting method). The introduction of service delivery platform over MANETs enables and facilitates...
In recent years group-oriented services are one of the primary application classes that are addressed by Mobile Ad hoc Networks (MANET). To support such services, multicast routing is used. Multicast routing is the simultaneous delivery of data stream to multiple destinations without sending duplicate copies over any one link with the objective of resource optimization. It can significantly improve...
The increasing growth of the global Internet making the shortcomings of its unstructured topology and distributed routing algorithm are exposed more rapidly. To design a controllable, scalable and manageable backbone network with a simple, efficient architecture is very imperative. Among many topologies, Tree topology which has a natural hierarchical structure and explicit end-to-end transmission...
Monitoring applications in onshore oil and gas production environments are usually based on wireless solutions. Most part of nowadays applications rely upon outdated technologies, based on the use of analog radios and inefficient master-slave communication topologies. In this paper, we investigate the use of Wireless Sensor Network (WSN) technologies to monitor oil and gas production environments...
Mobile Ad Hoc Network is a Network composed of mobile nodes that topology is constantly changing. If in the routing in these networks, the nodes that are selected as route nodes are not stable and have a high mobility, data transmission route is broken quickly. Therefore, the method can be considered in the routing that from the nodes are between source and destination, nodes that are more stable,...
Today's Internet is facing many problems which did not take into account in its initial design, such as routing scalability, mobility and security. No matter evolutional or revolutionary solutions that are proposed in recent years, a recognized promising direction is to separate customer network from core network and separate identification from location. In this paper, we sketch out an architecture...
As the high redundancy of network equipments and paths, connection reliability is no longer the most important parameter for networks. According to network function, this paper advances transmission time reliability as a common parameter to describe network congestion. It is defined to be the probability that networks will transmit material, energy or information timely when used under specified operating...
The topology of a delay tolerant network (DTN) over time has been modeled by a space-time graph. However, the mobility of nodes, such as buses, may not be completely predictable due to factors such as traffic load, road condition, the number of passengers getting on and off the buses, and the operations of traffic lights. In this paper, we adapt the space-time graph by augmenting each horizontal edge...
We studied a class of Service Overlay Network (SON) design problem with reliability constraints. It is assumed that a SON network could enter an inadmissible status for two reasons; first when there is insufficient resource to accommodate new connections, second when some hardware devices malfunction. The design problem is usually formulated as either a Maximum Profit (MP) constrained optimization...
This paper proposes a Resilient Overlay for Mission Critical Applications (ROMCA); a novel operator-independent overlay architecture providing a resilient and reliable service across wide-area networks. One feature of ROMCA is that its overlay topology can be altered according to the underlying network conditions. Moreover, resilience is achieved by combining centralized topology construction control...
The lossy nature of wireless communication leads to many challenges while designing multihop networks. As an integral part of reliable communication in wireless networks, effective link estimation is essential for routing protocols. Recent studies have shown that link reliability-based metrics like ETX have better performance than traditional metrics such as hop count or latency. Usually, such metrics...
Many anticipated deployment scenarios, in particular military, healthcare, and disaster-recovery applications, of wireless sensor networks require reliable source to sink communication. In this paper, we introduce a novel reliable topology that uses hotlines between sensor gateways to enhance the reliability of end-to-end transmissions. These hotlines reduce the number of average hops from source...
Multi-path routing scheme can guarantee the probability of successful packet delivery in mobile ad hoc networks (MANET), network reliability can also be enhanced. A novel adaptive multi-path routing protocol with the maximum path lifetime is proposed. By calculating the lifetime of links without the aid of positioning equipments and extra control messages, the partial-disjoint multi-path can be established...
The probability of successful packet delivery in ad hoc networks can be guaranteed by multi-path routing scheme, which can enhance network reliability. With the analysis on the path number, a decision making method based on packet drop ratio is introduced; moreover, a novel adaptive multi-path routing protocol is proposed. By monitoring packet drop ratio on the links, mobile nodes estimate link status...
Traditional gossip-based protocols rely on underlying routing protocols to disseminate messages. In mobile ad hoc networks, frequent topology changes may incur many route errors, which increase the overhead of maintaining routing information. They also need to maintain a partial or global view of the network, which further increases the overhead. This paper presents a broadcast gossip protocol based...
Due to the special and complicated environment in coal mine, the reliability and energy-efficiency are both the primary issues to be considered during the design of the wireless sensor networks (WSNs) for coal mine. In this paper, we put forward a reliable geographical adaptive fidelity (RGAF) routing protocol, which is based on cluster-unit topology (CUT) for the WSNs in coal mine. RGAF utilizes...
In recent years, various routing protocols have been proposed for ad hoc networks. Most of these protocols are based upon simulation and security. These protocols still lack in terms of performance efficiency of routing protocols such as avoidance of route breaking, sensing of breakage in route, security and reliability (basically authentication of mobile hops in the real ad hoc networks. i.e. during...
In this paper, we introduce and evaluate ScaleMesh, a scalable miniaturized dual-radio wireless mesh testbed based on IEEE 802.11b/g technology- ScaleMesh can emulate large-scale mesh networks within a miniaturized experimentation area by adaptively shrinking the transmission range of mesh nodes by means of variable signal attenuators. To this end, we derive a theoretical formula for approximating...
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