Abstract
MANET does not require any fixed infrastructure, thus it fits well in disaster rescue and military operations. However, when a node has no or insufficient energy to function, communication may fail, disconnections may happen, and transactions may be aborted if they are time-critical and miss their deadlines. Energy-efficient transaction management becomes an important issue in MANET database applications. In this paper, we propose an energy-efficient concurrency control (CC) algorithm for MANET databases in a clustered network architecture where nodes are divided into clusters, each of which has a node, called cluster head, responsible for the processing of all nodes in the cluster. In our algorithm, in order to conserve energy and balance the energy consumption among servers, we elect cluster heads to work as coordinating servers, and propose an optimistic CC algorithm to offer high concurrency and avoid wasting limited system resources. The simulation results confirm that our technique performs better than existing techniques.
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