Gotowe bibliografie tematyczne / WMNs

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  2. Rozprawy doktorskie
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Gotowa bibliografia na temat „WMNs”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 25 maja 2024

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Artykuły w czasopismach na temat "WMNs"

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Kandeeban, Selvakani, i N. Suresh Kumar. "Investigational Security Structural Design Using Client and Server Ambitious Protocols for WMN". International Journal of Informatics and Communication Technology (IJ-ICT) 4, nr 1 (1.04.2015): 13. http://dx.doi.org/10.11591/ijict.v4i1.pp13-22.

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<p>Wireless mesh network plays an vital role in our day to day life, Networks are mainly used to deliver voice, video and data but using WMN’s we can communicate in outdoor environments without wired. A wireless mesh can deliver network capacity, reliability and security along with the flexibility. Nowadays the WMN’s are used by municipalities, public safety agencies, port authorities, and industrial organizations to connect to their workers and constituents. However, many technical issues still exist in this field. In order to provide a better understanding of the research challenges of WMNs, In this paper we propose MobiSEC, a complete security architecture protocols and algorithms for WMNs that provides both access control for mesh users and routers as well as a key distribution schemes that supports layer-2 encryption to ensure security and data confidentiality of all communications that occur in the WMN.</p>
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Vetrichelvi, G., i G. Mohan Kumar. "Implementation of ARS-STR in STR for Effective Energy Transmission". Asian Journal of Electrical Sciences 2, nr 1 (5.05.2013): 20–25. http://dx.doi.org/10.51983/ajes-2013.2.1.1854.

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Wireless mesh networks (WMNs) have emerged as a key technology for next generation wireless networking. Because of their advantages over other wireless networks, WMNs are undergoing rapid progress and inspiring numerous applications. In multi-hop wireless mesh networks (WMNs) experience frequent link failures caused by channel interference, dynamic obstacles and/or applications bandwidth demands. These failures cause severe performance degradation in WMNs or require expensive, manual network management for their real-time recovery. This paper presents an Autonomous network Reconfiguration System (ARS-STR) that enables a multi-radio WMN to autonomously recover from local link failures to preserve network performance. ARS-STR also improves channel efficiency.
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Pulyala, Ranjith. "Localized Network Reconfiguration Plan for Wireless Mesh Networks". International Journal for Research in Applied Science and Engineering Technology 10, nr 4 (30.04.2022): 779–805. http://dx.doi.org/10.22214/ijraset.2022.41305.

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Abstract: Wireless mesh networks (WMNs) have emerged as a key technology for next-generation wireless networking. Because of their advantages over other wireless networks, WMNs are undergoing rapid progress and inspiring numerous applications. In multi-hop wireless mesh networks (WMNs) experience frequent link failures caused by channel interference, dynamic obstacles and/or applications’ bandwidth demands. These failures cause severe performance degradation in WMNs or require expensive, manual network management for their real-time recovery. This paper presents an Autonomous network Reconfiguration System (ARS) that enables a multi-radio WMN to autonomously recover from local link failures to preserve network performance. ARS also improves channel efficiency by more than 90% over the other recovery methods. During their lifetime, multi-hop wireless mesh networks (WMNs) experience frequent link failures caused by channel interference, dynamic obstacles, and/or applications’ bandwidth demands. These failures cause severe performance degradation in WMNs or require expensive manual network management for their real-time recovery. By using channel and radio diversities in WMNs, ARS generates necessary changes in local radio and channel assignments in order to recover from failures. Next, based on the thus-generated configuration changes, the system cooperatively reconfigures network settings among local mesh routers. ARS has been evaluated extensively through ns2-based simulation. Our evaluation results show that ARS outperforms existing failure-recovery schemes in improving channel-efficiency by more than 90% and in the ability of meeting the applications’ bandwidth demands by an average of 200%. Keywords: WMN, ARS, AODV, WCETT, ETT, RSVP, DSDV, ETX, ETOPE, BLC
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Sakamoto, Shinji, Algenti Lala, Tetsuya Oda, Vladi Kolici, Leonard Barolli i Fatos Xhafa. "Application of WMN-SA Simulation System for Node Placement in Wireless Mesh Networks". International Journal of Mobile Computing and Multimedia Communications 6, nr 2 (kwiecień 2014): 13–21. http://dx.doi.org/10.4018/ijmcmc.2014040102.

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One of the key advantages of Wireless Mesh Networks (WMNs) is their importance for providing cost-efficient broadband connectivity. In WMNs, there are issues for achieving the network connectivity and user coverage, which are related with the node placement problem. In this work, the authors consider the router node placement problem in WMNs. The objective is to find the optimal distribution of router nodes in order to provide the best network connectivity (the maximal number of connected routers) and coverage (maximal number of covered clients). The authors apply their proposed WMN-SA simulation system in a realistic scenario of the distribution of mesh clients considering Itoshima City, Fukuoka Prefecture, Japan. From simulation results, they found many insights that can be very important for real deployment of WMNs.
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Siraj, Mohammad, i Zeeshan Abbasi. "Impact Of Load Balancing Interference Routing Metric On Multi Channel Multi Radio Wireless Mesh Network". ITM Web of Conferences 42 (2022): 01002. http://dx.doi.org/10.1051/itmconf/20224201002.

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Wireless Mesh Network (WMNs) is a promising technology that has been accepted favorably by the Internet Service Providers (ISPs). ISPs use it to provide last mile broadband Internet connectivity to the end users. This popularity arises from the fact, that it inter operates well with diverse wireless systems and provides robust fault tolerance with a high degree of redundancy and reliability. Routing metrics plays a crucial part in the performance of WMN. When routing protocols are implemented, the routing metric is assigned to different paths. It calculates the optimum path to predict the best routing path. These are integrated in routing protocols to improve WMNs efficiency in terms of reliability, latency, throughput, error rate and cost. This paper compares the impact of using load balancing interference aware routing metric (LBIARM) on the performance of Multi-Channel Multi Radio WMNs (MCMR WMNs). The performance of LBIARM was evaluated by comparing it with popular standard metrics weighted cumulative expected transmission time metric and Hop Count metric. OPNET Modeler 17.5 PL1 was used as a simulation tool for implementation. Simulation results show the effectiveness of using LBIARM metric on MCMR WMNs.
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Supraja, Dr P., Anas A. Salameh, Dr Varadaraju H R, Dr M. Anand i Unggul Priyadi. "An Optimal Routing Protocol Using a Multiverse Optimizer Algorithm for Wireless Mesh Network". International Journal of Communication Networks and Information Security (IJCNIS) 14, nr 3 (23.12.2022): 36–46. http://dx.doi.org/10.17762/ijcnis.v14i3.5569.

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Wireless networks, particularly Wireless Mesh Networks (WMNs), are undergoing a significant change as a result of wireless technology advancements and the Internet's rapid expansion. Mesh routers, which have limited mobility and serve as the foundation of WMN, are made up of mesh clients and form the core of WMNs. Mesh clients can with mesh routers to create a client mesh network. Mesh clients can be either stationary or mobile. To properly utilise the network resources of WMNs, a topology must be designed that provides the best client coverage and network connectivity. Finding the ideal answer to the WMN mesh router placement dilemma will resolve this issue MRP-WMN. Since the MRP-WMN is known to be NP-hard, approximation methods are frequently used to solve it. This is another reason we are carrying out this task. Using the Multi-Verse Optimizer algorithm, we provide a quick technique for resolving the MRP-WMN (MVO). It is also proposed to create a new objective function for the MRP-WMN that accounts for the connected client ratio and connected router ratio, two crucial performance indicators. The connected client ratio rises by an average of 16.1%, 12.5%, and 6.9% according to experiment data, when the MVO method is employed to solve the MRP-WMN problem, the path loss falls by 1.3, 0.9, and 0.6 dB when compared to the Particle Swarm Optimization (PSO) and Whale Optimization Algorithm (WOA), correspondingly.
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Barolli, Admir, i Shinji Sakamoto. "A web interface for WMN-PSODGA hybrid intelligent simulation system: performance evaluation for different mesh client distributions". International Journal of Web Information Systems 18, nr 1 (7.12.2021): 41–54. http://dx.doi.org/10.1108/ijwis-11-2021-0120.

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Purpose The purpose of this paper is to implement a web interface for a hybrid intelligent system. By using the implemented web interface, one can find optimal assignments of mesh routers in wireless mesh networks (WMNs). This study evaluates the implemented system considering three distributions of mesh clients to solve the node placement problem in WMNs. Design/methodology/approach The node placement problem in WMNs is well known to be a computationally hard problem. Therefore, intelligent algorithms are used for solving this problem. The implemented system is a hybrid intelligent system based on meta-heuristics algorithms: particle swarm optimization (PSO) and distributed genetic algorithm (DGA). The proposed system is called WMN-PSODGA. Findings This study carried out simulations using the implemented simulation system. From the simulations results, it was found that the WMN-PSODGA system performs better for chi-square distribution of mesh clients compared with Weibull and exponential distributions. Research limitations/implications For simulations, three different distributions of mesh clients were considered. In the future, other mesh client distributions, number of mesh nodes and communication distance need to be considered. Originality/value This research work, different from other research works, implemented a hybrid intelligent simulation system for WMNs. This study also implemented a web interface for the proposed system, which make the simulation system user-friendly.
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Sandhu, Preet Pavneet Kaur, i Prof Jatinder Singh Saini. "QoS in Wireless Mesh Networks- A Review". INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY 13, nr 6 (30.06.2014): 4543–48. http://dx.doi.org/10.24297/ijct.v13i6.2516.

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This paper is a review on QoS issue of Wireless mesh networks. QoS comes up with a great collection of networking technologies and procedures that guarantees the capability of a network to deliver with predictable consequences. WMNs have emerged as a flexible, reliable and cost effective way of providing broadband internet access over wide areas through multi hop communication. This paper has reviewed different routing protocols used in the WMNs. The overall objective of this paper is to explore the various short comings of the routing protocols of WMN.
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Binh, Le Huu, i Tung Khac Truong. "An Efficient Method for Solving Router Placement Problem in Wireless Mesh Networks Using Multi-Verse Optimizer Algorithm". Sensors 22, nr 15 (23.07.2022): 5494. http://dx.doi.org/10.3390/s22155494.

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Wireless Mesh Networks (WMNs) are increasingly being used in a variety of applications. To fully utilize the network resources of WMNs, it is critical to design a topology that provides the best client coverage and network connectivity. This issue is solved by determining the best solution for the mesh router placement problem in WMN (MRP-WMN). Because the MRP-WMN is known to be NP-hard, it is typically solved using approximation algorithms. This is also why we are conducting this work. We present an efficient method for solving the MRP-WMN using the Multi-Verse Optimizer algorithm (MVO). A new objective function for the MRP-WMN is also proposed, which takes into account two important performance metrics, connected client ratio and connected router ratio. Experiment results show that when the MVO algorithm is applied to the MRP-WMN problem, the connected client ratio increases by 15.1%, 11.5%, and 5.9% on average, and the path loss reduces by 1.3, 0.9, and 0.6 dB when compared to the Genetic Algorithm (GA), Particle Swarm Optimization (PSO), and Whale Optimization Algorithm (WOA), respectively.
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Alsaadi, Mohsen S., i Naif D. Alotaibi. "Routing Protocols Design and Performance Evaluation in Wireless Mesh Networks". International Journal of Technology Diffusion 10, nr 1 (styczeń 2019): 60–74. http://dx.doi.org/10.4018/ijtd.2019010104.

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The wireless mesh networks (WMNs) have become one of the popular technologies of the wireless network utilization. WMN provides reliable and scalable wireless network because of its features such as dynamic self-organizing, self-configuring, Self-managing and self-healing. Routing protocols play an essential role in finding and establishing an active route from a source to a destination in WMNs. This article focuses on the performance evaluation and comparison of some routing protocols commonly used in WMNs for VoIP application: AODV, DSR, OLSR and TORA has been investigated over client Wireless Mesh Networks based on OPNET simulation in a different network sizes and mobility. This article presents a background of some designs and solutions based on an elaborated simulation investigation. The performance comparisons are carried out with regard to the node variation in network sizing and mobility. Based on the empirical outputs, the authors suggested that to utilize a specific routing protocol in certain situations.
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Rozprawy doktorskie na temat "WMNs"

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Molerón, Bermudez Daniel, i Capilla Sergio Sánchez-Camacho. "Distributed DHCP for WMNs using IPv6". Thesis, Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-996.

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In a Wireless Mesh Network (WMN) exists mobile nodes which have an

unpredictable behaviour, i.e. they can join, leave and free move around the

network. For this reason, a static network configuration is not proper for them. A

distributed Dynamic Host Configuration Protocol (DHCP) is needed due to the

unavailability of a centralized server in a network placed over a vast extension.

This report shows a Distributed DHCP for WMNs using IPv6 (Internet Protocol

version 6). It is fault tolerant, robust and durable. The algorithm was created using

counters Bloom filters as data structure. After, a complete simulation of the system

was done. The simulations showed that using 24 servers with 16Mbits of memory

each one is possible to manage around 9000000 clients without adding an excessive

network load. Therefore, the DDHCPv6 could be in a near future the host

configuration protocol in WMN.

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Joshi, Saugat. "Fast and Efficient Mutual Authentication in Wireless Mesh Networks (WMNs)". University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1303843971.

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Ahmad, Waqas, i Muhammad Kashif Aslam. "An investigation of Routing Protocols in Wireless Mesh Networks (WMNs) under certain Parameters". Thesis, Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1127.

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Wireless Mesh Networks (WMNs) are bringing revolutionary change in the field of wireless networking. It is a trustworthy technology in applications like broadband home networking, network management and latest transportation systems. WMNs consist of mesh routers, mesh clients and gateways. It is a special kind of wireless Ad-hoc networks. One of the issues in WMNs is resource management which includes routing and for routing there are particular routing protocols that gives better performance when checked with certain parameters. Parameters in WMNs include delay, throughput, network load etc. There are two types of routing protocols i.e. reactive protocols and proactive protocols. Three routing protocols AODV, DSR and OLSR have been tested in WMNs under certain parameters which are delay, throughput and network load. The testing of these protocols will be performed in the Optimized Network Evaluation Tool (OPNET) Modeler 14.5. The obtained results from OPNET will be displayed in this thesis in the form of graphs. This thesis will help in validating which routing protocol will give the best performance under the assumed conditions. Moreover this thesis report will help in doing more research in future in this area and help in generating new ideas in this research area that will enhance and bring new features in WMNs.
Wireless Mesh Networks (WMNs) bringar revolutionerande förändring inom området för trådlösa nätverk. Det är en pålitlig teknik i tillämpningar såsom bredband hemma nätverk, nätverkshantering och senaste transportsystem. WMNs består av mesh routrar, kunder mesh och gateways. Det är en speciell typ av trådlöst ad-hoc-nätverk. En av frågorna i WMNs är resurshushållning som inkluderar routing och routing det finns särskilda routingprotokoll som ger bättre prestanda vid kontroll med vissa parametrar. Parametrar i WMNs omfatta dröjsmål, genomströmning, belastningen på nätet etc. Det finns två typer av routingprotokoll dvs reaktiva protokoll och proaktiva protokoll. Tre routingprotokoll AODV, DSR och OLSR har testats i WMNs under vissa parametrar som är försenade, genomströmning och belastningen på nätet. Testning av dessa protokoll kommer att utföras i den optimerade Network Evaluation Tool (OPNET) Modeler 14.5. De erhållna resultaten från OPNET kommer att visas i denna avhandling i form av grafer. Denna uppsats kommer att bidra till att godkänna vilka routingprotokoll kommer att ge bäst resultat enligt den antagna förhållanden. Dessutom kommer denna uppsats rapport kommer att bidra till att göra mer forskning i framtiden på detta område och bidra till att generera nya idéer inom detta forskningsområde som kommer att öka och att nya funktioner i WMNs.
+46762749245
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GHUMMAN, SHAKEEL AHMAD. "Security in Wireless Mesh Network". Thesis, Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-4175.

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The Master’s thesis report describes the wireless mesh networks functions,

characteristics, network management and finally different protocols with security issues and applications. Wireless Networks (WMNs) are replacing wireless Infrastructure networks in many areas because of their lower and higher flexibility. The wireless mesh networks (WMNs) provides network access for both mesh and conventional clients through mesh routers and mesh clients. Communication across the network is formed via the bridge functions. Mesh router also provides the minimal mobility and form the backbone of WMNs.

Wireless mesh network has resolved the limitation of ad hoc networks which is ultimately improves the performance of Ad hoc networks. Security is a very important issue which can be resolve through proper management of network. The improvment of 802.11i security has greatly improved the network perfomance and increase the encryption and integrity security capabilities. The key points which are being addressed in this report are security issues and threats and their counter measures. Attacks which can come on diffent layers are being discussed in this survey. Security of wireless mesh network is still under consideration. Wireless mesh network are attracting more attention due to its enhanced features.

Wireless mesh network topology technology is being discussed in this report. Then network management of WMNs is explained and in the concluding chapters security issues are discussed. Threats, attacks and challenges of WMNs are discussed in this survey.

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Mudali, Pragasen. "Topology control for wireless mesh networks and its effect on network performance". Thesis, University of Zululand, 2017. http://hdl.handle.net/10530/1565.

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A thesis submitted to the Faculty of Science and Agriculture in fulfilment of the Degree of Doctor of Philosophy in the Department of Computer Science at the University of Zululand, 2017
InfrastructureWireless Mesh Networks (I-WMNs) are increasingly used to provide network connectivity and Internet access to previously under-served areas in the developing world. It is common for some of these deployments to be battery-powered due to a lack of electrical infrastructure in the targeted areas. Thus, the energy-efficiency of these networks gains additional importance. Topology Control (TC) has been previously reported to improve the energy-efficiency and network performance of wireless ad-hoc networks, including I-WMNs. However,simulation-based studies have been relied upon to reach these conclusions and the study of TC prototypes applicable to I-WMNs has largely been limited to design issues. Thus, the study of the efficacy of TC prototypes as a mechanism for improving energy-fficiency and network performance remains an open issue. The thesis addresses this knowledge gap by studying the dynamic, run-time behaviours and the network topologies created by two standards-compatible TC prototypes. This study provides unique insight into how the prototypes consume computational resources, maintain network connectivity, produce cumulative transceiver power savings and affect the workings of the routing protocol being employed. This study also documents the topology instability caused by transceiver power oscillations produced by the PlainTC prototype. A context-based solution to reduce transceiver power oscillations and the subsequent topology instability is proposed. This solution applies the Principal Component Analysis statistical method to historical network data in order to derive the weights associated with each of the identified context variables. A threshold value is defined that only permits a node to adjust its transceiver power output if the observed change in a node’s context exceeds the threshold. The threshold mechanism is incorporated into the PlainTC+ prototype and is shown to reduce topology instability whilst improving network performance when compared to PlainTC.The results obtained in this study suggest that I-WMN topologies formed by TC are able to closely match the performance of networks that do not employ TC. However, this study shows that TC negatively affects the energy efficiency of the network despite achieving cumulative transceiver power savings.
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Nandiraju, Deepti. "Efficient Traffic Diversion and Load-balancing in Multi-hop Wireless Mesh Networks". University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1258477338.

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Ni, Xian Electrical Engineering &amp Telecommunications Faculty of Engineering UNSW. "Performance evaluation of ETX on grid based wireless mesh networks". Publisher:University of New South Wales. Electrical Engineering & Telecommunications, 2008. http://handle.unsw.edu.au/1959.4/41016.

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In the past few years Wireless Mesh Networks (WMNs) have developed as a promising technology to provide flexible and low-cost broadband network services. The Expected Transmission Count (ETX) routing metric has been put forward recently as an advanced routing metric to provide high QoS for static WMNs. Most previous research in this area suggests that ETX outperforms other routing metrics in throughput and efficiency. However, it has been determined that ETX is not immune to load sensitivity and route oscillations in a single radio environment. Route oscillations refer to the situation where packet transmission switches between two or more routes due to congestion. This has the effect of degrading performance of the network, as the routing protocol may select a non optimal path. In this thesis we avoided the route oscillation problem by forcing data transmission on fixed routes. This can be implemented in the AODV (Ad hoc On-demand Distance Vector) protocol by disabling both error messages and periodic updating messages (the HELLO scheme). However, a critical factor for our approach is that ETX must determine a high quality initial route in AODV. This thesis investigates whether the ETX metric improves initial route selection in AODV compared to the HOPS metric in two representative client-server applications: the Traffic Control Network (TCN) and the Video Stream (VS) network. We evaluate the ETX and HOPS metrics in a range of scenarios which possess different link qualities and different traffic loads. We find the ETX metric greatly improves initial route selection in AODV compared to the HOPS in the network in which only single flow exists. For networks in which there are multiple simultaneous flows, ETX behaves similar to HOPS in initial route selection. Based on these results, we find the solution of route stabilization to route oscillations in the context of ETX is only useful in the single flow case. To address this problem, we propose a modified solution of repeatedly broadcasting RREQ (Route Request) packets. Simulation results show that our modified solution allows ETX to be useful in the initial route selection in both single flow and multiple simultaneous flows cases.
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Moad, Dalil. "Contribution à l'amélioration de la qualité de service dans les réseaux sans-fil multi-sauts". Thesis, Sorbonne Paris Cité, 2015. http://www.theses.fr/2015PA05S010.

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Les réseaux sans fil 802.11 sont en train d'être considérés comme étant la pierre angulaire des systèmes de communication autonomes. En permettant aux usagers de communiquer les uns avec les autres avec les stations de base fixées a des endroits bien précis par l'intermédiaire de protocoles de communication comme les protocole de routage ad hoc. Le standard IEEE 802.11 propose des spéciations pour les deux couches basses (MAC et Physique) du modelé OSI. La couche MAC (Medium Access Control) introduit deux mécanismes d'accès au médium sans fil qui sont différents l'un de l'autre. Le mécanisme DCF (accès au canal distribue ou Distributed Coordination Function), l'accès au canal s'exécute dans chaque station sans faire appel à une unité centrale. Le mécanisme PCF (Point Coordination Function), contrairement au mécanisme DCF l'accès au canal se fait à l'aide d'une unité centrale. Le mécanisme le plus utilise par la norme 802.11 est DCF vu qu'il ne nécessite pas d'infrastructure au déploiement. Pour améliorer la qualité de service dans les réseaux sans multi- sauts, cette thèse aborde cette problématique dans deux couches de la pile protocolaire, à savoir la couche routage et la couches MAC. Elle améliore le routage a QoS en utilisant le protocole de routage a état de lien optimisé (OLSR) et améliore aussi l'efficacité de l'accès au médium sans fil lors du fonctionnement de la couche MAC en mode le plus courant DCF. Pour l'amélioration de routage, nous proposons une approche basée sur le graphe de conflit pour l'estimation de la bande passante partagée entre les nœuds adjacents. Pour la couche MAC, nous proposons un nouveau schéma de Backoff nomme l'algorithme Backoff de Padovane (PBA), pour améliorer l'efficacité de l'accès au médium sans fil dans les réseaux sans fil mobiles Ad Hoc (MANETs)
IEEE 802.11 based wireless networks are considered the cornerstone of autonomous communication systems. These networks allow users to communicate with each others via base stations deployed in specic locations through a set of dedicated communication protocols like Ad Hoc routing protocols. The IEEE 802.11 standard proposes specications for both physical and MAC layers of the OSI model. MAC layer denes dierent types of access to the wireless medium as explained below. The DCF (Distributed Coordination Function) mechanism, in which the access to the medium is executed localy in each station. The PCF (Point Coordination Function) method, unlike DCF mechanism the access the medium is managed by a central unit. The most widespread mechanism among them is the DCF mode as it does not require any infrastructure deployment. To improve the Quality of Service (QoS) oered to the dierent applications in multihop wireless networks, this thesis proposes original solutions to enhance the eciency of certain protocols in two dierent layers of OSI, i.e., routing and MAC layers. More specically, our proposed solutions enable higher eciency of OLSR protocol and ensure more ecient usage of the available bandwidth through the designed Padovan based medium access scheme operating in DCF mode. The routing approach used in OLSR is improved by applying the conict graphs to acquire more accurate estimation of the bandwidth shared with the adjacent nodes. At MAC layer, the number of collisions in dense networks is signicantly reduced by designing new backo scheme dubbed Padovan Backo Algorithm (BEB)
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Moad, Dalil. "Contribution à l'amélioration de la qualité de service dans les réseaux sans-fil multi-sauts". Electronic Thesis or Diss., Sorbonne Paris Cité, 2015. http://www.theses.fr/2015USPCB082.

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Les réseaux sans fil 802.11 sont en train d'être considérés comme étant la pierre angulaire des systèmes de communication autonomes. En permettant aux usagers de communiquer les uns avec les autres avec les stations de base fixées a des endroits bien précis par l'intermédiaire de protocoles de communication comme les protocole de routage ad hoc. Le standard IEEE 802.11 propose des spéciations pour les deux couches basses (MAC et Physique) du modelé OSI. La couche MAC (Medium Access Control) introduit deux mécanismes d'accès au médium sans fil qui sont différents l'un de l'autre. Le mécanisme DCF (accès au canal distribue ou Distributed Coordination Function), l'accès au canal s'exécute dans chaque station sans faire appel à une unité centrale. Le mécanisme PCF (Point Coordination Function), contrairement au mécanisme DCF l'accès au canal se fait à l'aide d'une unité centrale. Le mécanisme le plus utilise par la norme 802.11 est DCF vu qu'il ne nécessite pas d'infrastructure au déploiement. Pour améliorer la qualité de service dans les réseaux sans multi- sauts, cette thèse aborde cette problématique dans deux couches de la pile protocolaire, à savoir la couche routage et la couches MAC. Elle améliore le routage a QoS en utilisant le protocole de routage a état de lien optimisé (OLSR) et améliore aussi l'efficacité de l'accès au médium sans fil lors du fonctionnement de la couche MAC en mode le plus courant DCF. Pour l'amélioration de routage, nous proposons une approche basée sur le graphe de conflit pour l'estimation de la bande passante partagée entre les nœuds adjacents. Pour la couche MAC, nous proposons un nouveau schéma de Backoff nomme l'algorithme Backoff de Padovane (PBA), pour améliorer l'efficacité de l'accès au médium sans fil dans les réseaux sans fil mobiles Ad Hoc (MANETs)
IEEE 802.11 based wireless networks are considered the cornerstone of autonomous communication systems. These networks allow users to communicate with each others via base stations deployed in specic locations through a set of dedicated communication protocols like Ad Hoc routing protocols. The IEEE 802.11 standard proposes specications for both physical and MAC layers of the OSI model. MAC layer denes dierent types of access to the wireless medium as explained below. The DCF (Distributed Coordination Function) mechanism, in which the access to the medium is executed localy in each station. The PCF (Point Coordination Function) method, unlike DCF mechanism the access the medium is managed by a central unit. The most widespread mechanism among them is the DCF mode as it does not require any infrastructure deployment. To improve the Quality of Service (QoS) oered to the dierent applications in multihop wireless networks, this thesis proposes original solutions to enhance the eciency of certain protocols in two dierent layers of OSI, i.e., routing and MAC layers. More specically, our proposed solutions enable higher eciency of OLSR protocol and ensure more ecient usage of the available bandwidth through the designed Padovan based medium access scheme operating in DCF mode. The routing approach used in OLSR is improved by applying the conict graphs to acquire more accurate estimation of the bandwidth shared with the adjacent nodes. At MAC layer, the number of collisions in dense networks is signicantly reduced by designing new backo scheme dubbed Padovan Backo Algorithm (BEB)
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Халаберда, В. В., В. Є. Марчук, V. V. Halaberda i V. Ye Marchuk. "Модернізація складу шляхом впровадження WMS системи". Thesis, Національний авіаційний університет, 2022. https://er.nau.edu.ua/handle/NAU/54820.

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У статті розглядаються рішення, що дозволяють оптимізувати бізнес-процеси за допомогою інформаційних технологій. Проаналізовано необхідність автоматизації обліку діяльності підприємств із використанням WMS для забезпечення конкурентоспроможності на конкурентному ринку.
The article considers solutions that allow you to optimize business processes using information technology. The necessity of automation of the account of activity of the enterprises with use of WMS for maintenance of competitiveness in the competitive market is analyzed.
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Książki na temat "WMNs"

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Pichtel, John. Terrorism and WMDs. Second edition. | Boca Raton, FL : CRC Press, 2016.: CRC Press, 2016. http://dx.doi.org/10.4324/9781315369341.

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Salisbury, Daniel, Ian J. Stewart i Andrea Viski, red. Preventing the Proliferation of WMDs. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72203-0.

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Terrorism and WMDs: Awareness and response. Boca Raton, FL: CRC Press, 2011.

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1944-, Kaufman Alan S., i Lai Zona C, red. Essentials of WMS-III assessment. New York: J. Wiley & Sons, 2002.

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A, Holdnack James, i Hilsabeck Robin C, red. Essentials of WMS-IV assessment. Hoboken, N.J: Wiley, 2011.

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Lichtenberger, Elizabeth O. Essentials of WMS-III assessment. New York, NY: Wiley, 2002.

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Gorman, John. The Buzzard: Inside the glory days of WMMS and Cleveland rock radio. Cleveland, OH: Gray & Co., 2007.

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Gorman, John. The Buzzard: Inside the glory days of WMMS and Cleveland rock radio, a memoir. Cleveland, Ohio: Gray & Co., 2007.

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Gorman, John. The Buzzard: Inside the glory days of WMMS and Cleveland rock radio, a memoir. Cleveland, Ohio: Gray & Co., 2007.

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Wechsler, David. WMS-R: Wechsler Memory Scale--Revised : manual. San Antonio: Psychological Corp., 1987.

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Części książek na temat "WMNs"

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Singh, Madhusudan. "Routing Protocol for WMNs". W Node-to-Node Approaching in Wireless Mesh Connectivity, 15–20. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0674-7_3.

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Oda, Tetsuya, Evjola Spaho, Admir Barolli, Leonard Barolli, Fatos Xhafa i Makoto Takizawa. "WMN-GA System for Node Placement in WMNs: Effect of Grid Shape". W Lecture Notes in Electrical Engineering, 47–56. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6996-0_6.

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Barolli, Admir, Seiji Ohara, Shinji Sakamoto, Makoto Takizawa i Leonard Barolli. "Performance Evaluation of WMNs Using WMN-PSOHC-DGA Considering LDVM and RDVM Replacement Methods". W Advanced Information Networking and Applications, 298–307. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44041-1_28.

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Barolli, Admir, Shinji Sakamoto, Seiji Ohara, Leonard Barolli i Makoto Takizawa. "Performance Evaluation of WMNs Using WMN-PSOHC-DGA Considering Evolution Steps and Computation Time". W Advances in Internet, Data and Web Technologies, 127–37. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-39746-3_14.

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Sakamoto, Shinji, Leonard Barolli i Shusuke Okamoto. "Performance Evaluation of WMNs by WMN-PSOSA System Considering Chi-square and Exponential Client Distributions". W Advanced Information Networking and Applications, 397–406. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-15032-7_34.

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Sakamoto, Shinji, Seiji Ohara, Leonard Barolli i Shusuke Okamoto. "Performance Evaluation of WMNs by WMN-PSOHC Hybrid Simulation System Considering CM and LDVM Replacement Methods". W Advanced Information Networking and Applications, 288–97. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44041-1_27.

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Barolli, Admir, Shinji Sakamoto, Leonard Barolli i Makoto Takizawa. "Performance Analysis of WMNs by WMN-PSODGA Simulation System Considering Weibull and Chi-square Client Distributions". W Advanced Information Networking and Applications, 366–75. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-15032-7_31.

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Barolli, Admir, Shinji Sakamoto, Kosuke Ozera, Makoto Ikeda, Leonard Barolli i Makoto Takizawa. "Performance Evaluation of WMNs by WMN-PSOSA Simulation System Considering Constriction and Linearly Decreasing Vmax Methods". W Advances on P2P, Parallel, Grid, Cloud and Internet Computing, 111–21. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-69835-9_10.

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Sakamoto, Shinji, Seiji Ohara, Leonard Barolli i Shusuke Okamoto. "Performance Evaluation of WMNs WMN-PSOHC System Considering Constriction and Linearly Decreasing Inertia Weight Replacement Methods". W Lecture Notes in Networks and Systems, 22–31. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-33506-9_3.

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Barolli, Admir, Tetsuya Oda, Fatos Xhafa, Leonard Barolli, Petraq Papajorgji i Makoto Takizawa. "WMN-GA System for Node Placement in WMNs: Performance Evaluation for Weibull Distribution of Mesh Clients". W Lecture Notes in Electrical Engineering, 223–31. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6996-0_24.

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Streszczenia konferencji na temat "WMNs"

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Chang, Xinyue, Tetsuya Oda, Evjola Spaho, Makoto Ikeda, Leonard Barolli i Fatos Xhafa. "Node Placement in WMNs Using WMN-HC System and Different Movement Methods". W 2014 IEEE 28th International Conference on Advanced Information Networking and Applications (AINA). IEEE, 2014. http://dx.doi.org/10.1109/aina.2014.159.

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Mahmud, Sahibzada Ali, Shahbaz Khan, Shoaib Khan i Hamed Al-Raweshidy. "A comparison of MANETs and WMNs". W the 1st international conference. New York, New York, USA: ACM Press, 2006. http://dx.doi.org/10.1145/1189355.1189373.

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Shila, Devu Manikantan, i Tricha Anjali. "Defending selective forwarding attacks in WMNs". W 2008 IEEE International Conference on Electro/Information Technology (EIT 2008). IEEE, 2008. http://dx.doi.org/10.1109/eit.2008.4554274.

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Oda, Tetsuya, Admir Barolli, Evjola Spaho, Leonard Barolli, Fatos Xhafa i Jiro Iwashige. "Node Placement in WMNs and Visualization of Evolutionary Computation Process Using WMN-GA System". W 2012 15th International Conference on Network-Based Information Systems (NBiS). IEEE, 2012. http://dx.doi.org/10.1109/nbis.2012.35.

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Meeran, Mohammad Tariq, Paul Annus i Yannick Le Moullec. "Approaches for improving VoIP QoS in WMNs". W 2017 International Conference on Electrical Engineering and Computer Science (ICECOS). IEEE, 2017. http://dx.doi.org/10.1109/icecos.2017.8167138.

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Egners, Andre, Patrick Herrmann i Ulrike Meyer. "Secure and efficient handover protocols for WMNs". W 2013 IEEE 14th International Symposium on "A World of Wireless, Mobile and Multimedia Networks" (WoWMoM). IEEE, 2013. http://dx.doi.org/10.1109/wowmom.2013.6583410.

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Liqiang Zhao, Hailin Zhang, Wei Ding i Jie Zhang. "Game-theoretic particle swarm optimization for WMNs". W 2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications. IEEE, 2008. http://dx.doi.org/10.1109/pimrc.2008.4699395.

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KAVITHA, ATHOTA, i ATUL NEGI. "CHANNEL ASSIGNMENT IN WMNS: ISSUES AND SOLUTIONS". W Proceedings of the International Conference on ICCNT 2009. WORLD SCIENTIFIC, 2009. http://dx.doi.org/10.1142/9789814289771_0028.

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Theil, Markus, Martin Backhaus, Michael Rossberg i Guenter Schaefer. "Towards a Security Architecture for Hybrid WMNs". W ARES '19: 14th International Conference on Availability, Reliability and Security. New York, NY, USA: ACM, 2019. http://dx.doi.org/10.1145/3339252.3340106.

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Jyothi, K. P. Tritva, i Kavitha Athota. "Performance analysis of IEEE 802.11e over WMNs". W 2012 2nd World Congress on Information and Communication Technologies (WICT 2012). IEEE, 2012. http://dx.doi.org/10.1109/wict.2012.6409158.

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Raporty organizacyjne na temat "WMNs"

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R. E. Broz. Waste Management Information System (WMIS) User Guide. Office of Scientific and Technical Information (OSTI), grudzień 2008. http://dx.doi.org/10.2172/945220.

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Sanghavi, Sujay. Cascading Failures in Networks: Inference, Intervention and Robustness to WMDs. Fort Belvoir, VA: Defense Technical Information Center, sierpień 2016. http://dx.doi.org/10.21236/ad1013319.

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Downer, Charles W., E. J. Nelson i Aaron Byrd. Primer: Using Watershed Modeling System (WMS) for Gridded Surface Subsurface Hydrologic Analysis (GSSHA) Data Development - WMS 6.1 and GSSHA 1.43C. Fort Belvoir, VA: Defense Technical Information Center, styczeń 2003. http://dx.doi.org/10.21236/ada412251.

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Wiggert, Jerry, Brandy Armstrong, Mustafa Kemal Cambazoglu i K. K. Sandeep. Mid-Breton Sediment Diversion (MBrSD) Assessment – Final Report. The University of Southern Mississippi, 2022. http://dx.doi.org/10.18785/sose.001.

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The purpose of this project is to provide managers at the Mississippi Department of Marine Resources (MDMR) with the scientific information needed to accurately address public concerns regarding the potential effects of the Louisiana Coastal Master Plan / Coastal Protection and Restoration Authority (CPRA) Mid-Breton Sediment Diversion (MBrSD) on the jurisdictional waters and resources of Mississippi. The stated design purpose of the MBrSD is to reconnect and re-establish the deltaic sediment deposition process between the Mississippi River and the Breton Sound Basin through a diversion that will deliver up to 75,000 cfs of sediment-laden freshwater. The report presented herein provides model-based guidance on the impact that the introduction of the MBrSD will have on salinity conditions in the Mississippi Sound (MSS) and Mississippi's jurisdictional waters that encompass oyster reef locations. Oysters are key ecosystem health indicators and economic drivers for the State of Mississippi and freshwater diversions into the western MS Sound (WMSS) have recently led to significant, unprecedented environmental impacts resulting in oyster mortality. The potential addition of a new pathway for additional freshwater to be introduced into the MSS requires careful assessment of the potential impacts that may be incurred. This project is designed to assess the impact of implementing the MBrSD on the physical environment in the WMSS. The primary aim is to understand the connectivity between MBrSD-derived freshwater input to Breton Sound on the environmental conditions impacting the oyster reefs of the WMSS near Bay St. Louis. A physical ocean modeling system based on the Coupled Ocean Atmosphere Wave Sediment Transport (COAWST) has been used to simulate the circulation and dynamics over the entire MSS with the analysis presented herein focusing particularly on the western to central MSS. This project demonstrates the importance of applying modeling-based scientific research and the capability of physical ocean circulation models for assessing aquatic ecosystem health, particularly in key oyster reef areas.
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Deliman, Patrick N., Willard J. Pack i E. J. Nelson. Integration of the Hydrologic Simulation Program--FORTRAN (HSPF) Watershed Water Quality Model into the Watershed Modeling System (WMS). Fort Belvoir, VA: Defense Technical Information Center, wrzesień 1999. http://dx.doi.org/10.21236/ada369085.

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ОПТИМИЗАЦИЯ ЛОГИСТИЧЕСКОЙ ПОДСИСТЕМЫ СКЛАДИРОВАНИЯ: ПРАКТИКА ВНЕДРЕНИЯ WMS. LJournal, 2016. http://dx.doi.org/10.18411/d-2016-018.

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