Grid-based Model for Recovery of Lost Connectivity in Wireless Sensor and Actor Network

摘要

Wireless Sensor and Actor Networks (WSAN) are basically a collection of actors and sensors collaborating via a wireless medium to perform designated tasks. Maintaining inter-actor connectivity is critical to a WSAN, as failure at one point may result in communication loss amongst nodes or in a network disjoint. To recover from an actor node failure, optimal re-localization and coordination techniques should be in place. However, existing recovery schemes suffer from high degrees of actor node relocation overhead as well as network overhead. In this paper, we introduce a Grid-based Mathematical Model for efficient Actor Recovery by Determining Forwarding Capacity (GMMFC). The proposed model aims to provide effective monitoring and actor failure detection mechanism supported by an efficient actor recovery algorithm. GMMFC presents an innovative concept in actor node recovery while proposing improvements in WSAN QoS performance using RSSI Message information. The proposed solution is compared with state-of-the-art algorithms. The experimental results manifest better performance over delay, throughput, packet delivery ratio, energy consumption as well as for messages exchanged between sensor and actor nodes. Thus, the proposed model demonstrates improvements in QoS parameters.