Service Level Agreements for Wireless Sensor Networks: A WSN operator's point of view

Abstract

The era of the Internet of Things brings complexity and deployment costs in smart cities, particularly in Wireless Sensor Networks (WSNs). Utilities such as gas or water providers are keen on delegating the management of the communications to specialized firms, namely WSN Operators, that will share the WSN resource among their various clients. WSN operators will use a functional architecture to manage the Service Level Agreements (SLAs), i.e. the Quality of Service (QoS) clauses they contract with their clients. WSN operators will need a robust and reliable technology in order to guarantee QoS constraints in a wireless environment, as in the industrial world. IEEE 802.15.4e Time Slotted Channel Hopping (TSCH) [1] is one good candidate. Moreover, the IETF experience in IP networks management is an important input for monitoring and QoS control over WSNs. This article gives formal guidelines for the implementation of a SLA architecture for operated WSNs. It distinguishes the various formal algorithms that are necessary to operate a WSN according to SLAs, and determines which functional entities are necessarily technology-dependent. Detailed examples of such entities are developed in an IPv6 over IEEE 802.15.4e TSCH context, such as advocated in the IETF 6TiSCH Working Group [2].

A Feedback Approach for QoS-Enhanced MAC in Wireless Sensor Network

“…Service Level Agreement (SLA) is a service contract between the service provider (either internal or external) and the end user which defines the service level expected from the service provider. Researchers [13,14] have brought out this concept in WSN. SLA is an application layer protocol which administrates, manages, and negotiates how to set QoS parameters.…”

Mapas de Ambiente Rádio Aplicados às Redes de Sensores Sem Fio

“…Detalhes dos procedimentos de ajuste da função analítica do semi-variograma e da geração das estimativas de potência de recepção são apresentados em [8]. Usando as estimativas de potência de recepção fornecidas pelo mapa REM, gerou-se o mapa de probabilidade de sucesso de recepção de pacotes, empregando a expressão (2). O mapa resultante é mostrado na Figura 4.…”

“…Faculdade de Engenharia Elétrica e da Computação, Universidade Estadual de Campinas, Campinas-SP, Brasil, E-mails: gui.iot@decom.fee.unicamp.br, cardieri@decom.fee.unicamp.br. O presente trabalho foi realizado com o apoio da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior -Brasil (CAPES) -Código de Financiamento 001.de acesso sem fio para a conexão de sensores ou atuadores[2] em aplicações de IoT, os chamados Provedores de Serviços de IoT. Nesse sentido, aparece a questão do controle de qualidade de serviço (Quality of Service, QoS) prestado ao cliente.…”

Service Level Agreement Characteristics of Monitoring Wireless Sensor Networks for Water Resource Management (SLAs4Water)

“…In [6] the authors give formal guidelines for the implementation of a SLA architecture for operated WSNs. The architecture is designed to distinguish the formal algorithms necessary to operate a WSN according to SLAs.…”