Enhanced association mechanism for IEEE 802.15.4 networks

Constante, Luan Nagel; Lau, Jim; Moraes, Ricardo; Araújo, Gustavo Medeiros de; Montez, Carlos; Leão, Érico

doi:10.1109/etfa.2017.8247603

Cited by 7 publications

(6 citation statements)

References 17 publications

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“…OW allows the implementation of a hybrid scheduling model, that temporarily changes the current bottom-up scheduling to a top-down scheduling, in order to prioritise the control traffic. Moreover, this mechanism also promotes the fast control message dissemination through an improved configuration of the CSMA-CA parameters, as described in [34]. Figure 8 illustrates the OW mechanism for a depth-4 cluster-tree network.…”

Section: Opportunity Window and Dissemination Of Reconfiguration Contmentioning

confidence: 99%

Dynamic Reconfiguration of Cluster-Tree Wireless Sensor Networks to Handle Communication Overloads in Disaster-Related Situations

Lino

Leão

Soares

et al. 2020

Sensors

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The development of flexible and efficient communication mechanisms is of paramount importance within the context of the Internet of Things (IoT) paradigm. IoT has been used for industrial, commercial, and residential applications, and the IEEE 802.15.4/ZigBee standard is one of the most suitable protocols for this purpose. This protocol is now frequently used to implement large-scale Wireless Sensor Networks (WSNs). In industrial settings, it is becoming increasingly common to deploy cluster-tree WSNs, a complex IEEE 802.15.4/ZigBee-based peer-to-peer network topology, to monitor and control critical processes such as those related to oil or gas, mining, or certain specific chemicals. The remote monitoring of critical events for hazards or disaster detection in large areas is a challenging issue, since the occurrence of events in the monitored environment may severely stress the regular operation of the network. This paper proposes the Dynamic REconfiguration mechanism of cluster-Tree WSNs (DyRET), which is able to dynamically reconfigure large-scale IEEE 802.15.4 cluster-tree WSNs, and to assign communication resources to the overloaded branches of the tree based on the accumulated network load generated by each of the sensor nodes. A complete simulation assessment demonstrates the proposed mechanism’s efficiency, and the results show that it can guarantee the required quality of service level for the dynamic reconfiguration of cluster-tree networks.

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Section: Opportunity Window and Dissemination Of Reconfiguration Contmentioning

confidence: 99%

Dynamic Reconfiguration of Cluster-Tree Wireless Sensor Networks to Handle Communication Overloads in Disaster-Related Situations

Lino

Leão

Soares

et al. 2020

Sensors

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“…The last improvement in the handover mechanism is related to the CSMA/CA default parameters of IEEE 802.15.4. In order to speed up message transmissions, this proposal uses alternative values for the macMinBE and macMaxBE parameters, as originally proposed in [ 33 ].…”

Section: System and Network Modelmentioning

confidence: 99%

A New Association Scheme for Handling Node Mobility in Cluster-Tree Wireless Sensor Networks

Casagrande

Moraes

Montez

et al. 2020

Sensors

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Node mobility in multi-hop communication environments is an important feature of Wireless Sensor Network (WSN)-based monitoring systems. It allows nodes to have freedom of movement, without being restricted to a single-hop communication range. In IEEE 802.15.4 WSNs, nodes are only able to transfer data messages after completing a connection with a coordinator through an association mechanism. Within this context, a handover procedure needs to be executed by a mobile node whenever there is a disconnection from a coordinator and the establishment of a connection to another one. Many applications, such as those found in health monitoring systems, strongly need support for node mobility without loss of data during the handover. However, it has been observed that the time required to execute the handover procedure is one of the main reasons why IEEE 802.15.4 cannot fully support mobility. This paper proposes an improvement to this procedure using a set of combined strategies, such as anticipation of both the handover mechanism and the scan phase enhancement. Simulations show that it is possible to reduce latency during the association and re-association processes, making it feasible to develop WSN-based distributed monitoring systems with mobile nodes and stringent time constraints.

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“…Dentre estes parâmetros de inicialização, o macMinBE e o macMaxBE provocam maior influência no desempenho de RSSFs [11], pois definem os valores para BE, que determinam o intervalo [0, 2 BE -1] de atribuição de uma duração aleatória de períodos de backoffs para os quais um nó deve aguardar antes de tentar acessar o canal de comunicação sem fio.…”

Section: Redes De Sensores Sem Fio Cluster-treeunclassified

Section: Trabalhos Relacionadosunclassified

“…Neste mesmo ínterim, em [11] e [16], os autores propõem redes que promovem níveis diferenciados de QoS. Em [11], os autores propõem uma otimização no processo de associação dos nós sensores em redes IEEE 802.15.4. Já em [16], os autores propõem um mecanismo de ajuste dos parâmetros CSMA-CA, a fim de garantir QoS e serviços diferenciados para fluxos de mensagens gerados por dispositivos em aplicações de smart grid.…”

Section: Trabalhos Relacionadosunclassified

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Mecanismo Eficiente para Disseminação do Tráfego de Controle em Redes de Sensores Sem Fio Cluster-Tree baseadas no IEEE 802.15.4

Lino¹,

Vasconcelos²,

Leão³

et al. 2019

Anais Estendidos Do IX Simpósio Brasileiro De Engenharia De Sistemas Computacionais (SBESC Estendido 2019)

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As normas IEEE 802.15.4 e ZigBee definem a pilha de protocolos amplamente utilizada na operação de Redes de Sensores sem Fio (RSSF). A topologia cluster-tree, suportada por estas normas, oferece recursos como escalabilidade, sendo apontada pela literatura como a mais adequada para a implementação de aplicações de RSSFs em larga escala. Entretanto, essas redes podem sofrer com congestionamentos e atrasos devido aos seus diferentes padrões de tráfego. Por um lado, são usualmente priorizadas as mensagens do tráfego de monitoramento geradas por nós sensores, que seguem em direção ao coordenador da rede (tráfego upstream); por outro, sofrem maiores atrasos as mensagens de controle que seguem o tráfego inverso (tráfego downstream). Este artigo propõe um mecanismo eficiente para a rápida disseminação do tráfego de controle em RSSFs cluster- tree. A ideia principal consiste em combinar um esquema de escalonamento híbrido periódico, com a definição de janelas de oportunidade Top-Down, com um esquema de configuração adequada dos parâmetros CSMA-CA (Carrier Sense Multiple Access with Collision Avoidance) para os nós coordenadores, a fim de possibilitar uma rápida disseminação das mensagens de controle, sem gerar impactos relevantes para o típico tráfego de monitoramento. Resultados de simulações mostram que a definição de janelas de oportunidades Top-Down, aliada com uma adequada configuração de valores macMinBE e macMaxBE para nós coordenadores, podem reduzir significativamente os atrasos de comunicação e aumentar a taxa de entrega de mensagens de controle, sem interferir de forma relevante nas métricas do tráfego de monitoramento, mesmo em cenários de grande densidade de nós sensores.

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Enhanced association mechanism for IEEE 802.15.4 networks

Cited by 7 publications

References 17 publications

Dynamic Reconfiguration of Cluster-Tree Wireless Sensor Networks to Handle Communication Overloads in Disaster-Related Situations

Dynamic Reconfiguration of Cluster-Tree Wireless Sensor Networks to Handle Communication Overloads in Disaster-Related Situations

A New Association Scheme for Handling Node Mobility in Cluster-Tree Wireless Sensor Networks

Mecanismo Eficiente para Disseminação do Tráfego de Controle em Redes de Sensores Sem Fio Cluster-Tree baseadas no IEEE 802.15.4

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