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For the purpose of improving to redundancy of the transmission path, compensating for poor communication quality of wireless communication in harsh industrial environments and partly improving reliability of industrial wireless networked control system (WNCS), the multi-path transmission mechanism based on topology of dual-band and secondary structure is proposed. The topology of dual-band and secondary...
This paper considers a new transportation problem: Lane Reservation Problem in Time Constrained Transportation. This kind of problem comes from large sportive events in a city or region where the travel time between sportive villages and stadium should fall in a strict time window. To guarantee the athlete transportation in time, the problem consists in temporarily creating special lanes on roads...
In order to reduce the congestion of Ad Hoc network and increase the speed of routing searching, the link-disjoint paths algorithm based on ant colony optimization is proposed in this paper. The new algorithm introduces the intelligence and positive feedback of ant algorithm to link-disjoint paths algorithm to improve the probability of path optimization, sets the age domain of ant to reduce immersion,...
In this paper, a novel method, namely contextual routing and navigation, is proposed. This method is based on the author's proposed hierarchical, lane-oriented 3D road network. The key to implement contextual routing and navigation is to adopt cognition-based hierarchical routing strategy and the view-based multi-scale navigation strategy. The two strategies enable users routing on roadway centreline,...
In QoS routing for wired networks, multiple path routing is popularly used. Because of excessive routing overhead, algorithms are not well suited for MANET networks. The IEEE 802.3 DCF standard allows for the use of multiple channels available at the physical layer, by improving the capacity of MANET networks by using multiple channel interfaces, a dual channel routing (DCR) scheme is introduced that...
The traditional routing mechanism based on single path has become bottleneck which affects and restricts the performance of the whole network. Multi-next hop routing mechanism can implement packets forwarding in parallel, while preserves the best-effort model of the network layer. Multi-next hop technology can effectively ease the network congestion, increase resource utilization and enhance the network...
To effectively avoid congestion and take full advantage of bandwidth inside a network, routing optimization is needed for path selection over a set of equal-cost-multi-paths. In this paper, a Link-Criticality-based ECMP routing optimization algorithm is proposed. As the traffic in the network overlaps on some links, LCER selects the path with least link average utilization and hops for the ECMPs....
Increasing transmission power is an effective way to improve real-time data delivery in wireless sensor networks. On the other hand, increased power will also incur more interference though it can improve the link quality to increase real-time communication. So there is a tradeoff between interference and delay. In this paper, we consider a joint power control, scheduling and real-time routing problem,...
Existing mobile ad-hoc routing protocols are based on a discrete, bimodal model for links between nodes: a link either exists or is broken. This model cannot distinguish transmissions which fail due to interference or congestion from those which fail due to their target being out of transmission range. A statistical network link model is introduced to represent the quality of the link by a statistical...
In high performance computing environment in many fields, to finish a task requires not only computing service, but also data service and all kinds of device services, which results in different relation dependences and is very complex, however, job management systems such as PBS, LSF, and Condor and so on, only support time dependence among jobs, and are short of fault-tolerance and complete flow...
Monitoring and response for emergency environments is a novel application area for the deployment of wireless sensor networks. In this context, delay-bounded delivery and robust routing is the essential operating criteria in order to ensure safe and timely response for emergency scenarios. Existing routing mechanisms for wireless sensor networks are not well suited for hazard situations, especially...
Wireless sensor networks (WSNs) usually work under harsh environment, so high packet loss rate is induced by the unreliable and error-prone wireless links. To cope with the problem, a competition and cooperation based reliable forwarding protocol (CCRF) is proposed. In CCRF, the characteristic of dense deployment of sensor nodes and broadcast feature of the wireless channel in WSN are utilized. Specifically,...
In a trustworthy network with the mechanism of Source Address Validation Architecture (SAVA), each packet received and forwarded has been ensured to hold an authenticated source IP address, which can prevent the attackers to forge the originating IP address to evade responsibility for their malicious packets. However, it is impossible to deploy SAVA all over the Internet in one night. In this paper,...
Enterprise Service Bus (ESB) is a kind of SOA-based software infrastructure for business application integration. In this paper, it firstly analyses the current state of enterprise integration and the drawbacks of the hub-and-spoke topology, then it introduces a new design approach for EAI base on ESB called EAI-ESB. The EAI-ESB approach which contains Message construction, Messaging channels, Listener,...
An optimal planned route is a foundation of safe and economical navigation. This paper proposes a method for the shortest distance routing in a chart based on testing a spatial relation of a linear route segment and an obstacle area. Firstly, safety contour traces are traced and obstacle areas are acquired automatically. Then possible optimum paths circumambulating an obstacle are searched automatically...
To improve the fault tolerance of the distributed spanning tree (DST) structure, we present an improved DST structure through orderly storing the elements in groups. Further, we give a representative selection rule, and based on which the node arrival and departure algorithms are proposed to balance the distribution of representatives in the structure. The maximal difference of the probabilities of...
In order to overcome the convergence deficiency of the basic ACO, an improved ACO based on the direction of the logistics and distribution problem was proposed. The logistics optimization method was used to optimize the path finding in the ACO. The simulation results show that the method of optimization of logistics and distribution path is practical and effective. This study provides a new powerful...
Based on the characteristics of DV-Distance, an improved scheme for the typical distributed localization algorithm in wireless sensor network is proposed. The main principle of the improved scheme is to introduce the hops between anchor nodes and unknown nodes to determine calibration value of the distance.Further more,a method of the new distance correction based on hops and Straight-line distance...
In this paper, we propose an energy-balanced cross-layer multi-path routing algorithm for wireless Ad hoc networks. This algorithm utilizes cross-layer information of the network nodes and can balance the energy consumption of the network nodes in flow distribution under the situation that the network topology is maintained unchanged; moreover, the transmission power can be adjusted in routing process...
A new solution to vehicle routing problem (VRP) is proposed in order to overcome the disadvantages that the exact algorithms and heuristics algorithms are difficult to solve vehicle routing problem with multiple constraints. A simulation model of vehicle routing problem is built by combining the object-oriented technology and discrete event simulation technology. In this model, the events of distribution...
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