SOGAND SAHABI MOGHADDAM - Department of Computer Engineering, Faculty of Engineering, Arak Branch, Islamic Azad University, Arak, Iran
ABBAS KARIMI - Department of Computer Engineering, Faculty of Engineering, Arak Branch, Islamic Azad University, Arak, Iran

Mobility nodes and limitation of energy are major causes of reducing accessibility to data in mobile ad hoc networks (MANETs). Many techniques have been provided to facilitate access to data of which the most significant is combination of data replication and multicast. In this combination, constructed virtual backbone based on connecting dominating set (CDS) is used to data replication, data search and routing. The purpose of this paper is increasing data access, reducing transmission cost and fault tolerance of data replication in which each node in virtual backbone has unit host detector and collects information from neighboring nodes using multicast. Via this method, the best possible options can be selected as a member of the CDS, if gathered data from neighbors have two non-adjacent neighbors. In simulations and performed experiments, it is revealed that the proposed technique has optimal results in spite of such errors and good performance in comparison to SCALAR protocol in MANETs.

MANETs, data replication, fault tolerant, multicast, CDS