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In Wireless Sensor and Actor Networks (WSANs), effective Actor-Actor Communication (AAC) is an important requirement for the timely responses to events reported by the sensors. However, due to scattered nature of events, mobility of actor nodes, and low density of actor nodes, the network of actor nodes tends to get partitioned frequently. To provide effective AAC in such situations, the energy-constrained...
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...
With the advantages of asynchronous and loosely coupled communication model, the Publish/Subscribe system has been widely spread in large-scale distributed mobile networks. According to the MANET's characteristics of dynamic topology and bandwidth-constraint, we propose an application scheme of Publish/Subscribe system over clustering MANET. We improve the cluster header by adding the Information...
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 Most part of nowadays applications rely upon outdated technologies, based on the use of analog radios and inefficient master-slave communication topologies.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,...
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...
Due to frequent link failures in multi-hop wireless networks, redundancy can be an important feature. For example, when planning the structure of a backhaul mesh network for public access, it is common to introduce redundant nodes in the mesh network. These are called redundant, because they do not increase the network capacity under normal operation, due to the shortest-path metric of the routing...
RACNet is a sensor network that monitors a data center's environmental conditions at high temporal and spatial resolutions. The data RACNet collects can improve the energy efficiency of data centers, currently one of the fastest growing energy consumers in the U.S. RACNet overcomes the challenge of reliable and low-latency data gathering from dense networks deployed in harsh RF environments through...
When planning the structure of a backhaul mesh network for public access, it is common to introduce redundant nodes in the mesh network. These are called redundant, because they do not increase the network capacity under normal operation, due to the shortest-path metric of the routing protocol. Instead, their sole purpose is to increase the network reliability by providing failover links when a link...
To indicate exactly the reliability of large-scale high-speed broadband communication network with domain partition and interconnection, a novel reliability index weighed by normalized capacity is defined, which organically combines connection performance with capacity. The correctness and rationality of the index are demonstrated on the aspects of objective factor of network and subjective factor...
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...
This paper proposes a fast forward medium access control protocol (FFMAC) for quality-of-service (QoS) guarantee in multihop IEEE 802.11s wireless mesh networks with multiple channels. To the best of our knowledge, the proposed protocol is the first one which considers the multihop and multichannel issues simultaneously. It provides higher priority for real-time applications, while remaining the distributed...
Wireless mesh networks (WMNs) have gained a lot of attention recently. Features such as self-configuration, self-healing and the low cost of equipment and deployment make WMN technology a promising platform for a wide range of applications. Traditional ad-hoc routing protocols are typically used to deal with the dynamic nature of these networks, which is mainly due to mobility. However, these protocols...
Due to the limited transmission range of wireless ad hoc network nodes, multiple hops are usually needed for a node to exchange information with any other node in the network. Thus routing is a crucial issue to the design of a MANET. In this paper, in accordance with the cross-layer design, the concept of load degree is introduced. Based on this metric load degree, a cross-layer design method that...
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