Recursive Position Estimation in Sensor Networks
ICNP '01 Proceedings of the Ninth International Conference on Network Protocols
A Bidding Protocol for Deploying Mobile Sensors
ICNP '03 Proceedings of the 11th IEEE International Conference on Network Protocols
Sensor replacement using mobile robots
Computer Communications
Efficient Placement and Dispatch of Sensors in a Wireless Sensor Network
IEEE Transactions on Mobile Computing
Distributed Deployment Schemes for Mobile Wireless Sensor Networks to Ensure Multilevel Coverage
IEEE Transactions on Parallel and Distributed Systems
Autonomous Deployment of Self-Organizing Mobile Sensors for a Complete Coverage
IWSOS '08 Proceedings of the 3rd International Workshop on Self-Organizing Systems
Maximizing Lifetime of Wireless Sensor Networks with Mobile Sensor Nodes
MDMW '08 Proceedings of the 2008 Ninth International Conference on Mobile Data Management Workshops
Maximizing the Lifetime of Wireless Sensor Networks with Mobile Sink in Delay-Tolerant Applications
IEEE Transactions on Mobile Computing
A Sensor Relocation Scheme for Wireless Sensor Networks
WAINA '11 Proceedings of the 2011 IEEE Workshops of International Conference on Advanced Information Networking and Applications
Repairing sensors strategies in fault-tolerant wireless sensor networks
Proceedings of the 8th ACM Symposium on Performance evaluation of wireless ad hoc, sensor, and ubiquitous networks
IEEE Transactions on Information Theory
Deploying Wireless Sensor Networks with Fault Tolerance for Structural Health Monitoring
DCOSS '12 Proceedings of the 2012 IEEE 8th International Conference on Distributed Computing in Sensor Systems
A novel sensor node relocation approach to maintain connectivity with a center of interest
Proceedings of the 15th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems
A Chain-Based Relocation Approach to Maintain Connectivity with a Center of Interest
CSE '12 Proceedings of the 2012 IEEE 15th International Conference on Computational Science and Engineering
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We propose a sensor node relocation approach in wireless sensor networks to maintain connectivity between a Region Of Interest (ROI) where the sensor nodes are initially deployed and a Center Of Interest (COI) outside the ROI where a particular event happens. Our proposed approach, called Chain Based Relocation Approach (CBRA), aims to relocate a minimum number of redundant sensors from their initial positions within the ROI towards the COI to maintain the connectivity between the ROI and the COI. CBRA uses steps which determine the redundant nodes' set, the propagation of the COI coordinates within the ROI and then the selection and the relocation of the redundant nodes towards the COI. The selection of the redundant nodes is based on an average energy consumption model to balance the energy consumption among the sensor nodes when they are relocated depending on their initial and final positions. We evaluate the performance of CBRA using performance metrics such as energy consumption, the number of relocated nodes, relocation time and number of transmitted messages. Sensor nodes are relocated using a chain-based method between the ROI and the COI. In addition, if one relocated sensor node fails, the connectivity between the COI and the ROI is affected. To address this possible failure, we propose a fault tolerant recovery procedure to repair the route between the COI and the ROI. Finally, we compare the performance of CBRA with two other approaches.