Maximizing a Lifetime of Wireless Sensor Network by Scheduling

The increase in the demand for Wireless Sensor Networks (WSNs) has intensified studies which aim to obtain energy-efficient solutions, since the energy storage limitation is critical in those systems. Traditional methods for sensor scheduling use either sensing coverage or network connectivity, but rarely both Schedule sensor nodes work alternatively by configuring some of them an off-duty status that has lower energy consumption than the normal on-duty one. In a single wireless sensor network, sensors assume two main functionalities: sensing and communication. Minimizing energy consumption in a highly dense wireless sensor network needs to maximize off-duty nodes in both domains. The communication range is twice the sensing range is the sufficient condition and the tight lower bound to ensure that complete coverage preservation implies connectivity among active node. In this paper we present the different scheduling methods of increasing the lifetime of wireless sensor network. analyze and classify the research of the network lifetime for wireless sensor network, the important point is to introduce some scheduling the methods of the researchers uses to maximize network lifetime and our proposed work on increasing the lifetime by scheduling. Depletion of these finite energy batteries can result in a change in network topology or in the end of network life itself. Hence, prolonging the life of wireless sensor networks is important. The network lifetime can depend on many other factors too. In this paper we analyze and classify the research of the network lifetime for wireless sensor network, the important point is to introduce the method the researchers uses to maximize network lifetime