Quality of Service-Based Node Relocation Technique for Mobile Sensor Networks

• Published in: Wireless communications and mobile computing Vol. 2019; no. 2019; pp. 1 - 13
• Main Authors: Jadoon, Rab Nawaz, Shahzad, Naveed, Khan, Iftikhar Ahmed, Nazir, Babar, Shahzad, Aamir, Shah, Syed Ayaz Ali, Malik, Aqdas Naveed, Khan, Muhammad Amir, Awan, Adnan Anwar, Jadoon, Waqas
• Format: Journal Article
• Language: English
• Published: Cairo, Egypt Hindawi Publishing Corporation 2019; Hindawi; Hindawi Limited
• Subjects: Algorithms; Back up systems; Connectivity; Failure; Nodes; Quality of service architectures; Relocation; Remote sensors; Sensors; Wireless networks; Wireless sensor networks
• ISSN: 1530-8669; 1530-8677
• DOI: 10.1155/2019/5043187

Wireless sensor networks (WSNs) deployed in harsh and unfavorable environments become inoperable because of the failure of multiple sensor nodes. This results into the division of WSNs into small disjoint networks and causes stoppage of the transmission to the sink node. Furthermore, the internodal collaboration among sensor nodes also gets disturbed. Internodal connectivity is essential for the usefulness of WSNs. The arrangement of this connectivity could be setup at the time of network startup. If multiple sensor nodes fail, the tasks assigned to those nodes cannot be performed; hence, the objective of such WSNs will be compromised. Recently, different techniques for repositioning of sensor nodes to recover the connectivity have been proposed. Although capable to restore connectivity, these techniques do not focus on the coverage loss. The objective of this research is to provide a solution for both coverage and connectivity via an integrated approach. A novel technique to reposition neighbouring nodes for multinode failure is introduced. In this technique, neighbouring nodes of the failed nodes relocate themselves one by one and come back to their original location after some allocated time. Hence, it restores both prefailure connectivity and coverage. The simulations show our proposed technique outperforms other baseline techniques.