Devices for Wireless Sensor Networks (WSN) are limited by power and thus routing protocols should be designed with this constrain in mind. WSNs are used in three dimensions (3D) scenarios such as surface of sea or lands with different level of highs. This paper presents and evaluates Three Dimensions Position Based Adaptive Real-Time Routing Protocol (3DPBARP) as a novel, real-time, position based and energy efficient routing protocol for Wireless Sensor Networks (WSN)s. 3DPBARP is a lightweight protocol that reduces the number of nodes which receive the RF signal using a novel Parent Forwarding Region (PFR) algorithm. 3DPBARP as a Geographical Routing Protocol (GRP) reduces the number of forwarding nodes and thus the traffic and packet collision in the network. A series of performance evaluations through Matlab and Omnet++ simulations show significant improvements in network performance parameters and total energy consumption over 3D Position Based Routing Protocol (3DPBRP) and Directed Flooding Routing Protocol (DFRP).
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