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Sistema autônomo de comunicação sem fio em malha alimentado por energia solar fotovoltaica.; An autonomous wireless mesh communication system powered by solar energy.

Alonso, Rafael Herrero
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 29/05/2009 Português
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86.48%
A tecnologia de comunicação em redes sem fio em malha, com base no padrão IEEE 802.11, tem sido uma solução tecnológica relevante no cenário atual das redes sem fio. Entretanto, com a eliminação dos cabos para comunicação de dados, as redes sem fio em malha dependem de fonte de energia para energizar os pontos de acesso da rede, que nem sempre está disponível na forma cabeada no local da instalação. Neste cenário, sendo o Brasil um país situado em uma zona tropical com alta incidência anual de radiação solar, a possibilidade da utilização da conversão da energia solar em elétrica é uma alternativa para eliminar a dependência de fonte de energia cabeada dos pontos de acesso da rede sem fio em malha. Este trabalho apresenta considerações sobre o desenvolvimento de sistemas autônomos de comunicação sem fio em malha, alimentados por energia solar fotovoltaica, compactos e de fácil instalação em área urbana e rural. Apresenta também, informações sobre o protótipo implementado denominado SAM Solar e respectiva avaliação quanto a autonomia, área de cobertura, número de usuários, altura mínima de instalação e taxa de transferência.; The wireless mesh network communication technology, based on the IEEE802.11 standard...

Wireless mesh networks planning based on parameters of quality of service

Da Silva, Marlon; Senne, Edson Luiz França; Vijaykumar, Nandamudi Lankalapalli
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Conferência ou Objeto de Conferência Formato: 441-446
Português
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The use of QoS parameters to evaluate the quality of service in a mesh network is essential mainly when providing multimedia services. This paper proposes an algorithm for planning wireless mesh networks in order to satisfy some QoS parameters, given a set of test points (TPs) and potential access points (APs). Examples of QoS parameters include: probability of packet loss and mean delay in responding to a request. The proposed algorithm uses a Mathematical Programming model to determine an adequate topology for the network and Monte Carlo simulation to verify whether the QoS parameters are being satisfied. The results obtained show that the proposed algorithm is able to find satisfactory solutions.

Estimação da capacidade de redes sem fio do tipo Mesh; Capacity estimation of wireless mesh networks

David Alfonso Muñoz Gallego
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 30/11/2005 Português
Relevância na Pesquisa
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Este trabalho apresenta uma estimação da capacidade das redes sem fio tipo Mesh. As redes deste tipo têm topologias e padrões de tráfego únicos que as diferenciam das redes sem fio convencionais. Nas redes sem fio tipo mesh os nós atuam como clientes e como servidores e o tráfego e encaminhado para uma ou várias gateways em um modo multi-salto. A estimação da capacidade é baseada em estudos da Camada Física e MAC. Efeitos da propagação do canal são avaliados; This work addresses the capacity of wireless mesh networks (WMN). This kind of networks has unique topologies and traffic patterns that differentiate them from conventional wireless networks. In WMN, the nodes act as clients and hosts and the traffic is forwarded to one or more gateways in a multihop fashion. The capacity estimation presented in this work is based on the physical and link layer investigation, using computer simulation

Um protocolo de roteamento escalavel com QoS para redes Mesh sem fio com multiplos radios; A scalabel QoS routing protocol for multi-radio wireless mesh networks

Rachel de Carvalho Paschoalino
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 21/02/2008 Português
Relevância na Pesquisa
96.57%
Devido à facilidade de implantação e gerência, as redes mesh sem fio constituem uma escolha natural para atender a crescente demanda por acesso sem fio com cobertura em larga escala. Formadas por roteadores mesh interligados através de enlaces sem fio, as WMNs (Wireless Mesh Networks) fornecem um backbone flexível para diversas aplicações e serviços. Entretanto, os protocolos de roteamento existentes aplicados às WMNs não provêem escalabilidade, reduzindo a vazão conforme o tamanho da rede aumenta. Esta dissertação apresenta um protocolo de roteamento escalável com QoS para WMNs multirádio. Incorporamos uma métrica local de qualidade do enlace e suporte a múltiplos rádios ao protocolo OLSR (Optimized Link State Routing). A métrica de qualidade é usada na seleção de nós especiais de relay, que irão compor as rotas. Variações na métrica de qualidade são tratadas na vizinhança de 1 salto, preservando estabilidade no roteamento. Por sua vez, o uso de múltiplos rádios por nó provê um melhor aproveitamento do espectro sem fio, minimizando a contenção. Essa abordagem simples e escalável permite distribuir o tráfego na rede por caminhos com enlaces de melhor qualidade. Através das simulações realizadas...

FastM: Design and Evaluation of a Fast Mobility Mechanism for Wireless Mesh Networks

Couto, Luís; Barraca, João; Sargento, Susana; Aguiar, Rui Luís
Fonte: IARIA Publicador: IARIA
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
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Although there is a large volume of work in the literature in terms of mobility approaches for Wireless Mesh Networks, usually these approaches introduce high latency in the handover process and do not support realtime services and applications. Moreover, mobility is decoupled from routing, which leads to inefficiency to both mobility and routing approaches with respect to mobility. In this paper we present a new extension to proactive routing protocols using a fast mobility extension, FastM, with the purpose of increasing handover performance in Wireless Mesh Networks. With this new extension, a new concept is created to integrate information between neighbor wireless mesh routers, managing locations of clients associated to wireless mesh routers in a certain neighborhood, and avoiding packet loss during handover. The proposed mobility approach is able to optimize the handover process without imposing any modifications to the current IEE 802.11 MAC protocol and use unmodified clients. Results show the improved efficiency of the proposed scheme: metrics such as disconnection time, throughput, packet loss and control overhead are largely improved when compared to previous approaches. Moreover, these conclusions apply to mobility scenarios...

AIGA: um ambiente integrado de gerência para redes em malha sem fio IEEE 802.11s; AIGA: A Management Integrated Environmental for Wireless Mesh Networks IEEE 802.11s

Carvalho, Dhiego Fernandes
Fonte: Universidade Federal do Rio Grande do Norte; BR; UFRN; Programa de Pós-Graduação em Sistemas e Computação; Ciência da Computação Publicador: Universidade Federal do Rio Grande do Norte; BR; UFRN; Programa de Pós-Graduação em Sistemas e Computação; Ciência da Computação
Tipo: Dissertação Formato: application/pdf
Português
Relevância na Pesquisa
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A Wireless Mesh Network (WMN - Wireless Mesh Network) IEEE 802.11s standard to become operational it is necessary to configure the parameters that meet the demands of its users, as regards, for example, the frequency channels, the power antennas, IPs addresses, meshID, topology, among others. This configuration can be done via a CLI (Command - Line Interface) or a remote interface provided by the equipment manufacturer, both are not standardized and homogeneous, like black boxes for the developers, a factor that hinders its operation and standardization. The WMN, as a new standard, is still in the testing phase, and tests are necessary to evaluate the performance of Path Discovery Protocol, as in this case of HWMP (Hybrid Wireless Mesh Protocol), which still has many shortcomings. The configuration and test creation in a WMN are not trivial and require a large workload. For these reasons this work presents the AIGA, a Management Integrated Environment for WMN IEEE 802.11s, which aims to manage and perform testbeds for analyzes of new Path Discovery Protocols in a WMN; Conselho Nacional de Desenvolvimento Científico e Tecnológico; Por serem redes com diversas características interessantes como auto-organização e tolerância a falhas...

Roteamento em redes em malha sem fio com balanceamento de carga e caminhos mais curtos; Routing in wireless mesh networks with load-balancing and shortest paths

Mello, Micael Oliveira Massula Carvalho de
Fonte: Universidade Federal de Goiás; Brasil; UFG; Programa de Pós-graduação em Ciência da Computação (INF); Instituto de Informática - INF (RG) Publicador: Universidade Federal de Goiás; Brasil; UFG; Programa de Pós-graduação em Ciência da Computação (INF); Instituto de Informática - INF (RG)
Tipo: Dissertação Formato: application/pdf
Português
Relevância na Pesquisa
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Wireless Mesh Networks (WMNs) are infrastructures with autonomic properties, such as self-organization and self-recovery, which can be developed with widely available technologies and low cost solutions. Besides their current applications, such as community networks and broad-band Internet access, WMNs can offer contributions in the context of the Internet of Things and help to build robust infrastructures to smart energy networks, among other uses. However, WMNs usually have performance issues due to overload in certain parts of the network and interference in wireless links. In this context, it is important that solutions are used to promote load-balancing and to mitigate interference between wireless links. Research in this area shows that one of the most promising approaches are in the subject of the joint routing and channel assignment. However, most of the previous works depends on the knowledge of the network traffic and handle flows with low granularity. In this thesis, we handle the performance problem in WMNs, in particular those having multiple radios and multiple available channels, using a joint approach, but without the mentioned restrictions. Our proposal is a joint heuristic, whose main contribution is the routing...

User location-aware video delivery over wireless mesh networks

Le-Dang, Quang; McManis, Jennifer; Muntean, Gabriel-Miro
Fonte: IEEE Computer Society Publicador: IEEE Computer Society
Tipo: info:eu-repo/semantics/conferenceObject; all_ul_research; ul_published_reviewed
Português
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peer-reviewed; Wireless Mesh Networks (WMN) have been widely deployed for last-mile network connectivity due to their flexibility, ease of use and low-cost deployment. When used in conjunction with peer-to-peer data transfer solutions, many innovative applications and services such as distributed storage, resource sharing and live video delivery can be deployed without any centralized administration. However, in order to achieve good quality of service in wireless environments, it is important that the associated peer-to-peer overlay is not only aware of the availability, but also of the location, of its peers and services. Focusing on the quality of video delivery, this paper first presents a wireless location-aware Chord-based overlay mechanism for WMN (WILCO) based on a novel geographical multi-level ID mapping and an improved finger table. Then, a novel segment seeking algorithm is proposed to make use of the location-awareness of the associated peer-to-peer overlay to locate and retrieve requested video segments from the nearest peers in order to improve video quality. Simulation results show how the proposed peer-to-peer video delivery solution for WMN outperforms existing state-of-the-art solutions in terms of video quality.

Combinación de técnicas de Network Coding y codificación lineal aleatoria sobre redes malladas inalámbricas; On the combination of Network Coding techniques and random linear coding over wireless mesh networks

Rodríguez Maza, Eduardo
Fonte: Universidade de Cantabria Publicador: Universidade de Cantabria
Tipo: Trabalho de Conclusão de Curso
Português
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RESUMEN: En este documento se describe el estudio que se ha desarrollado para analizar la influencia de las técnicas de network coding, combinadas con codificación lineal aleatoria, en el rendimiento en servicios de transmisión fiables sobre malladas inalámbricas. Concretamente, se aplicarán sobre un único flujo de datos (intra-flow) y utilizando UDP como protocolo de transporte. Este tipo de técnicas se basan en que los nodos intermedios dejan de tener un papel pasivo, fomentando una mejora del rendimiento e incrementando la robustez de la transmisión. El fuerte crecimiento en el uso de tecnologías inalámbricas ha propiciado constantes avances en este campo. Entre ellos destacan las redes malladas inalámbricas, que se han consolidado como una alternativa barata y sencilla para extender la cobertura de despliegues tradicionales. Sus características hacen que puedan beneficiarse de las ventajas ofrecidas por network coding. Sin embargo, este tipo de técnicas no son aún maduras y no existen numerosos estudios sobre las posibilidades reales de su uso. Para poder conocer los beneficios y problemas que supone el uso de técnicas de network coding, se ha hecho uso de la herramienta ns-3. Tras una extensa campaña de simulaciones...

Algoritmo para determinar la posibilidad de aplicar técnicas de codificación de red interflujo sobre redes malladas inalámbricas; Algorithm to assess the feasibility of inter-flow network coding techniques over wireless mesh networks

Garrido Ortiz, Pablo
Fonte: Universidade de Cantabria Publicador: Universidade de Cantabria
Tipo: Dissertação de Mestrado
Português
Relevância na Pesquisa
86.51%
RESUMEN: Este trabajo pretende estudiar la aplicabilidad de las técnicas de Network Coding sobre escenarios con un carácter aleatorio. Esta técnica, propuestas por Ahlswede, pretende mejorar el rendimiento mediante la combinación de paquetes pertenecientes a diferentes flujos de información. En concreto, se plantea su uso sobre redes malladas inalámbricas. La demanda de capacidad de los dispositivos inalámbricos ha sufrido un vertiginoso crecimiento en los últimos años y se espera que esta dinámica se mantenga, debido principalmente debe al aumento de dispositivos de comunicaciones inalámbricas y las capacidades que se ofrecen a los usuarios (videos, juegos, redes sociales...). Se marcan dos grandes retos para satisfacer las exigencias del mercado: ampliar la cobertura y mejorar el rendimiento, entendiendo que este último factor es una de las grandes debilidades de las comunicaciones inalámbricas. En el intento de mejorar ambos aspectos surgen las técnicas de Network Coding sobre redes malladas. Por un lado, las redes malladas pretenden aumentar el área de cobertura de despliegues más tradicionales y, por otro, las técnicas de Network Coding buscan mejorar el rendimiento que se alcanza en la comunicación bajo los estándares actuales de IEEE 802.11 (a nivel de enlace) y TCP/IP (a nivel de transporte y red). Para evaluar la aplicabilidad de estas técnicas se despliegan escenarios aleatorios y se desarrolla un algoritmo que permite evaluar si existe la opción de utilizar Network Coding. A pesar de que los escenarios aleatorios generados tienen ciertas características que favorecen el uso de Network Coding...

Analysis of SoftToken: a coordinated Medium Access Control (MAC) for IEEE 802.11 based wireless mesh networks

Eznarriaga Barranco, Lucas
Fonte: Universidade Carlos III de Madrid Publicador: Universidade Carlos III de Madrid
Tipo: info:eu-repo/semantics/bachelorThesis; info:eu-repo/semantics/masterThesis Formato: application/pdf
Português
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96.47%
Wireless Mesh Networks (WMNs) which can be integrated to other types of networks at a reasonable cost are good candidates to facilitate the efficient and flexible deployment of Next Generation Networks (NGNs). Due to the widespread presence of IEEE 802.11Wireless Local Area Networks (WLANs) most of current WMNs are based on this technology. However, IEEE 802.11 is primarly designed for one-hop networks and its random access protocol (CSMA/CA) is problematic in multi-hop environments due to collisions, which decrease efficiency and service quality. To alleviate these problems a novel approach, SoftToken, was proposed to provide a coordinated Medium Access Control (MAC) for WLANs whose goal is to add a token-passing mechanism on top of the standard IEEE 802.11 in a way that collisions can be avoided. In this thesis, we present an analysis and evaluation of SoftToken in various scenarios. We also develop some functions to integrate this protocol into the architecture designed by the CARrier grade MEsh Networks (CARMEN) project. -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------; Las Redes de Malla Inalámbricas (WMN en inglés) permiten integrar a un coste razonable otros tipos de redes...

Building an IP-based community wireless mesh network: Assessment

Bernardos, Carlos J.; Calderón, María; Soto, Ignacio; Solana, Ana Beatriz; Weniger, Kilian
Fonte: Elsevier Publicador: Elsevier
Tipo: info:eu-repo/semantics/acceptedVersion; info:eu-repo/semantics/article Formato: application/pdf; text/plain
Publicado em 15/02/2010 Português
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Wireless mesh networks are experiencing rapid progress and inspiring numerous applica tions in different scenarios, due to features such as autoconfiguration, self healing, connec tivity coverage extension and support for dynamic topologies. These particular characteristics make wireless mesh networks an appropriate architectural basis for the design of easy to deploy community or neighbourhood networks. One of the main chal lenges in building a community network using mesh networks is the minimisation of user intervention in the IP address configuration of the network nodes. In this paper we first consider the process of building an IP based mesh network using typical residential rou ters, exploring the options for the configuration of their wireless interfaces. Then we focus on IP address autoconfiguration, identifying the specific requirements for community mesh networks and analysing the applicability of existing solutions. As a result of that analysis, we select PACMAN, an efficient distributed address autoconfiguration mechanism origi nally designed for ad hoc networks, and we perform an experimental study using off the shelf routers and assuming worst case scenarios analysing its behaviour as an IP address autoconfiguration mechanism for community wireless mesh networks. The results of the conducted assessment show that PACMAN meets all the identified requirements of the community scenario.; European Community´s Seventh Framework Program

Deployment analysis of carrier grade urban wireless mesh networks

Lee, J.I.E; Chieng, David; Grubber, M.
Fonte: IEEE Publicador: IEEE
Tipo: info:eu-repo/semantics/acceptedVersion; info:eu-repo/semantics/conferenceObject Formato: application/pdf
Publicado em 15/12/2009 Português
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An optimized and cost-effective wireless mesh network (WMN) deployment for ubiquitous broadband wireless access is known to be highly dependent on a number of key factors such as backhaul solution, number of radio interfaces per node, type of radio technology, network topology/cluster, etc. The choice of network topology in turn affects the gateway-node ratio, and also the placement of gateways (GW)s and access points (AP)s. In this paper, we provide insights on the best possible upper-bound performance and inter-relationship between these key design factors under different operating conditions with respect to different target data rates per user. Next, we incorporate deployment cost analysis into the corresponding design option studies in order to provide more accurate justification on the feasibility of adopting different clustering techniques. The results from our analysis offer a general guideline or reference for network operators who intend to deploy a uniform blanket coverage using WMN especially in the urban environment.; European Community's Seventh Framework Program; Proceedings of: IEEE 9th Malaysia International Conference on Communications (MICC 2009), 15-17 December 2009, Kuala Lumpur (Malaysia)

Impact of misbehaviour on QoS in wireless mesh networks

Szott, Szymon; Natkaniec, Marek; Banchs, Albert
Fonte: Springer Publicador: Springer
Tipo: info:eu-repo/semantics/acceptedVersion; info:eu-repo/semantics/bookPart; info:eu-repo/semantics/conferenceObject Formato: application/pdf
Publicado em //2009 Português
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This paper analyzes the impact of misbehaviour on QoS provisioning in wireless mesh networks. Misbehaviour occurs when a network participant decides not to cooperate. Since cooperation is fundamental for distributed environments such as mesh networks, misbehaviour can be a serious threat to them. In this work, the authors focus on the IEEE 802.11 EDCA medium access function which provides QoS in mesh networks. Simulation studies have been performed to determine what realistic forms of misbehaviour can occur and what their impact is. From these results the most beneficial forms of MAC layer misbehaviour in multihop mesh networks are derived.; European Community's Seventh Framework Program; Proceedings of: 8th International IFIP-TC 6 Networking Conference (Networking 2009), Aachen, Germany, May 11-15, 2009

Link group management for carrier-grade wireless mesh networks

Gloss, Bernd
Fonte: IEEE Publicador: IEEE
Tipo: info:eu-repo/semantics/publishedVersion; info:eu-repo/semantics/conferenceObject; info:eu-repo/semantics/bookPart Formato: application/pdf
Publicado em //2010 Português
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Their distributed nature makes mesh networks easy to deploy and robust against node and link failures. However, distributing functionality adds high signalling overhead and delays. Forming resource clusters in wireless mesh networks is a wellknown concept to alleviate these issues. This article describes a link group system for carrier-grade wireless mesh networks that provides absolute QoS guarantees. In order to support heterogeneous wireless mesh networks, the system interface of this link group system is implemented as a technology independent interface. Performance evaluations show a good fairness without requiring per-flow queuing, a good overall system performance, and small packet delays in multi-hop setups, which makes these link groups an important component of carrier-grade wireless mesh networks; European Community's Seventh Framework Program; Proceedings of: 2010 Future Network & Mobile Summit, 16-18 June 2010, Florence, Italy

Application-aware scheduling for VoIP in wireless mesh networks

Bayer, Nico; Xu, Bangnan; Rakocevik, Veselin; Habermann, Joachim
Fonte: Elsevier Publicador: Elsevier
Tipo: info:eu-repo/semantics/acceptedVersion; info:eu-repo/semantics/article Formato: application/pdf
Publicado em 15/02/2010 Português
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Wireless Mesh Networks (WMNs) are seen as a means to provide last mile connections in Next Generation Networks (NGNs). Because of their auto configuration capabilities and the low deployment cost WMNs are considered to be an efficient solution for the support of multiple voice, video and data services in NGNs. This paper looks at the optimal provision of resources in WMNs for Voice over IP (VoIP) traffic, which has strict performance require ments in terms of delay, jitter and packet loss. In WMNs, because of the challenges intro duced by wireless multi hop transmissions and limited resources, providing performance quality for VoIP comparable to the voice quality in the traditional circuit switched net works is a major challenge. This paper analyses different scheduling mechanisms for TDMA based access control in mesh networks as specified in the IEEE 802.16 2004 WiMAX standard. The performance of the VoIP applications when different scheduling mechanisms are deployed is analysed on a variety of topologies using ns 2 simulation and mathematical analysis. The paper con cludes that on demand scheduling of VoIP traffic typically deployed in 802.11 based WMNs is not able to provide the required VoIP quality in realistic mesh WiMAX network scenarios and is therefore not optimal from a network operator’s point of view. Instead...

Topologies of wireless mesh networks with inband backhauling

Gruber, Markus; Klein, Siegfried; Uygungelen, Serkan; Chieng, David; It Ee, Lee; Zeller, Dietrich
Fonte: IEEE Publicador: IEEE
Tipo: info:eu-repo/semantics/acceptedVersion; info:eu-repo/semantics/conferenceObject Formato: application/pdf
Publicado em /09/2010 Português
Relevância na Pesquisa
96.32%
Wireless mesh networks (WMNs) with in band backhauling use the same antennas for the backhaul as well as for the access. Therefore antennas of next hop neighbours need to be directed to each other. However, such a configuration is not possible in a three-sectorized hexagonal cell deployment. In this paper we derive several alternative topologies that are suitable for WMNs with in band backhauling. We show that a topology with four directional antennas per node and backhaul connectivity between indirect neighbours outperforms competing topologies in terms of handover rate, optimal maximum power, and system capacity.; European Community's Seventh Framework Program; Proceedings of: PIMRC 2010: 21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications took place from 26-30 Sep. 2010 in Istanbul, Turkey

A cost sensitiviy analysis for carrier grade wireless mesh networks with tabu optimization

Chieng, David; Hugo, Dirk v.; Banchs, Albert
Fonte: IEEE Publicador: IEEE
Tipo: info:eu-repo/semantics/acceptedVersion; info:eu-repo/semantics/conferenceObject Formato: application/pdf
Publicado em /03/2010 Português
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We present an insight on the sensitivity of total cost (CAPEX+OPEX) towards various key input parameters for CARrier Grade Wireless MEsh Networks (CARMEN) deployment These input parameters span across three main categories namely the network design options, environment conditions and cost. Various boundary conditions are imposed to allow network operator to understand the impacts of parameters'changes with the highest level of uncertainty. A simple Tabu optimization method is adopted to optimize the node density against target data rate and range.; European Community's Seventh Framework Program; Proceedings of: CARMEN 2010: 2nd International Workshop on CARrier-grade wireless MEsh Networks in conjunction with IEEE INFOCOM 2010: IEEE Conference on Computer Communications Workshops: 15-19 March 2010, San Diego, California

A bridging-based solution for efficient multicast support in wireless mesh networks

Hadjadj- Aoul, Yassine; Murphy, Sean; Murphy, Liam
Fonte: IEEE Publicador: IEEE
Tipo: info:eu-repo/semantics/acceptedVersion; info:eu-repo/semantics/conferenceObject Formato: application/pdf
Publicado em 20/10/2009 Português
Relevância na Pesquisa
86.43%
Wireless mesh networking is a promising, cost effective and efficient technology for realizing backhaul networks supporting high quality services. In such networks, multicast data are transmitted blindly without any mechanism protecting data from loss, ensuring data reception, and optimizing channel allocation. The multicast services may undergo, then, very high data loss ratio which is exacerbated with the number of hops. In this paper, we propose a Reliable Multicast Distribution System (RMDS) to optimize multicast packets transmission in bridged networks. Relying on a modification of the IGMP snooping protocol, RMDS enables reliable services provisioning support in common wireless mesh networks. In particular, RMDS only exploits the local knowledge of a particular node to compute the multicast tree, which significantly reduces the signalling overhead in comparison with network layer and overlay solutions. Simulation results elucidate that RMDS optimizes resources’ allocation by reducing significantly the network load, the media access delay and the data drop rate compared to the classical approach, which is based on the combination of spanning tree algorithm and IGMP snooping protocol.; European Community's Seventh Framework Program; Proceedings of: The 34th Annual IEEE Conference on Local Computer Networks (LCN 2009)...

Community Building over Neighborhood Wireless Mesh Networks

Antoniadis, P.; Le Grand, B.; Satsiou, A.; Tassiulas, L.; Aguiar, R.L.; João Barraca; Susana Sargento
Fonte: IEEE Publicador: IEEE
Tipo: Artigo de Revista Científica
Português
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The fourth generation (4G) network paradigm has long been sought. A user-centric vision for such "always best connected" next-generation 4G networks is neighborhood wireless mesh networks (WMNs). In this context, the vision for the formation of WMNs reflects the trade-off between the immediate self-interest of the user, and the user's need for social contacts. Notably, users would be required to pool their resources in order to support the creation and operation of the underlying communication network (participating at all physical, access, and network layers), but also for the service provision on top of it. We argue that the design of communities suitable for this environment will encourage users to participate, enable trustworthy network creation, and provide a social layer, which can be exploited in order to design cross-layer incentive mechanisms that will further encourage users to share their resources and cooperate at lower layers.