Abstract
In orchard wireless sensor networks (WSN) application, the network link quality is unstable due to the shielding effect caused by the growth of branches and leaves. Aiming at the energy constrains of orchard WSN, an expecting lowest-residue-energy maximization opportunistic routing (ELMOR) method is proposed. The method combined link connective probability to forwarding list construction optimization so that, one-hop transmission success rate and the balance of network energy consumption are taken into account during the forwarding list construction. In order to improve the energy balance between network nodes, the opportunistic path is chosen not only considering the transmission cost but also lowest node energy. In this paper, we also proposed an efficient/reliable topology management opportunistic routing which considers Packet Drop Rate with considering network interference and energy loss. Through extensive performance evaluation, results show that the one hop power consumption of ExOR (extremely opportunistic routing) is about 3 times of EEOR (Energy Efficient Opportunistic Routing), 4 times of ELMOR (Expecting Lowest-residue energy Maximization Opportunistic Routing), with a 60% one-hop link success rate. The end-to-end power consumption of ExOR is about 1.3 times of EEOR and 1.4 times of ELMOR. In addition, according to achieved results, network performance significantly improved.
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