QoS Based Cooperative Communications and Security Mechanisms …downloads.hindawi.com/journals/js/2017/9768421.pdf · 2019. 7. 30. · Editorial QoS Based Cooperative Communications

EditorialQoS Based Cooperative Communications and SecurityMechanisms for Ad Hoc Sensor Networks

Shafiullah Khan,1 Jaime Lloret,2 Houbing Song,3 and Qinghe Du4

1 Institute of Information Technology, Kohat University of Science and Technology (KUST), Kohat City 26000, Pakistan2Integrated Management Coastal Research Institute, Universidad Politecnica de Valencia, Camino de Vera, 46022 Valencia, Spain3West Virginia University, Morgantown, WV, USA4Xi’an Jiaotong University, Xi’an, China

Correspondence should be addressed to Shafiullah Khan; [email protected]

Received 23 April 2017; Accepted 23 April 2017; Published 9 May 2017

Copyright © 2017 Shafiullah Khan et al.This is an open access article distributed under the Creative CommonsAttribution License,which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Wireless sensor networks (WSNs) are composed of sensornodes and sinks. Sensor nodes have the capability of self-healing and self-organizing. They are decentralized anddistributed in nature where communication takes place viamultihop intermediate nodes. The main objective of a sen-sor node is to collect information from its surroundingenvironment and transmit it to the sink. WSNs have manyapplications and are used in scenarios such as detectingclimate change, monitoring environments and habitats, andvarious other surveillance and military applications. Mostlysensor nodes are used in such areas where wired networksare impossible to be deployed.WSNs are deployed in physicalharsh and hostile environments where nodes are alwaysexposed to physical security risks damage.

Wireless sensor networks (WSNs) are gaining significantinterest from academia and industry. Multihop wireless net-works are self-organizing and self-healing with cost-effectivedeployment and maintenance, yet a lot needs to be donein terms of efficient and robust solutions. WSN has beenan interesting area of research in the lasts years for variousdisciplines. WSN is the most appropriate choice for differentenvironments monitoring.

In this special issue, we concentrate mainly on quality-of-service (QoS) based cooperative communication andadvanced security mechanisms for wireless sensor network.We are interested in novel ideas, advanced techniques, com-parative analysis of differentmethodologies, detailed surveys,and technical reviews on all aspects of QoS based cooperativecommunications and security mechanisms in wireless sensor

networks.This special issue covers industrial applications andacademic research contributions.

Potential topics included, but were not limited to, contextand location aware applications; data gathering, fusion, anddissemination in WSNs; operating system and middlewaresupport; multimedia over sensor networks; smart cities andsmart environment; cooperative communication; relayingtechniques; attacks and countermeasures; security tools; crosslayer security mechanisms; authentication and key man-agement; intrusion detection systems; security policies andinformation hiding; privacy and anonymity; active, passive,and denial of service (DoS) attacks; and secure routingprotocols.

We welcomed papers about techniques and applications,awareness, experiences, and best practices as well as futuretrends and needs related to all aspects of QoS based cooper-ative communication and security mechanisms.

The papers have been peer reviewed and have beenselected on the basis of their quality and relevance to the topicof this special issue.

The paper “Grid-Based Hybrid Network DeploymentApproach for Energy Efficient Wireless Sensor Networks”introduces a novel Grid-based Hybrid Network Deployment(GHND) framework which ensures energy efficiency andload balancing in wireless sensor networks. This researchis particularly focused on merge and split technique toachieve even distribution of sensor nodes across the grid.Low density neighboring zones are merged together whereashigh density zones are strategically split to achieve optimum

HindawiJournal of SensorsVolume 2017, Article ID 9768421, 2 pageshttps://doi.org/10.1155/2017/9768421

https://doi.org/10.1155/2017/9768421

2 Journal of Sensors

balance. Extensive simulations reveal that the proposedmethod outperforms state-of-the-art techniques in termsof load balancing, network lifetime, and total energyconsumption.

Coverage range and coverage probability are importantaspects to be considered for deploying WSN. The authorsin “A New Energy-Efficient Coverage Control with Multin-odes Redundancy Verification in Wireless Sensor Networks”propose an energy-efficient coverage control withmultinodesredundancy verification (ECMRV) scheme.

Energy-efficient spectrum sharing inWSN is an emergingand challenging research area. The authors in “StatisticalDelay QoS Provisioning for Energy-Efficient Spectrum-Sharing Based Wireless Ad Hoc Sensor Networks” developthe statistical delay QoS provisioning framework which iscapable of ensuring QoS based spectrum sharing in WSN.

In underwater acoustic channel, signal transmission mayexperience significant latency and attenuation that woulddegrade the performance of underwater communication.Thepaper “Time Reversal Aided Bidirectional OFDM Underwa-ter Cooperative Communication Algorithm with the SameFrequency Transmission” proposes time reversal aided bidi-rectional OFDM underwater cooperative communicationalgorithm.The algorithm allows all underwater sensor nodesshare the same uplink and downlink frequency simultane-ously to improve the spectrum efficiency.

Increasing research efforts have been dedicated to theubiquitous Internet of Things (IoT) access which demandsrobust quality-of-service (QoS) assurance in terms of securityand reliability over wireless channels. The authors in “RobustRelay in Narrow-Band Communications for Ubiquitous IoTAccess” propose a robust wireless relay scheme in narrow-band communications, which matches the typical featuresof IoT access carrying relatively low data rate with limitedbandwidth

We hope that this special issue will be useful for re-searchers from the academia and the industry, standarddevelopers, policy makers, professionals, and practitioners.

Shafiullah KhanJaime Lloret

Houbing SongQinghe Du

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QoS Based Cooperative Communications and Security Mechanisms …downloads.hindawi.com/journals/js/2017/9768421.pdf · 2019. 7. 30. · Editorial QoS Based Cooperative Communications