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In Wireless Sensor Network (WSN), sensors gather information about the physical world and the base station makes decision and then performs appropriate actions upon the environment. This technology enables a user to effectively sense and monitor from a distance in real-time. WSN uses real-time forwarding which means messages in the network are delivered according to their end-to-end deadlines (packet lifetime). This paper proposes optimal forwarding probability for real-time routing protocol with load distribution (RTLD) that provides efficient power consumption, high packet delivery ratio and minimum control packet overhead in WSN. It combines packet reception rate (PRR), maximum packet velocity and the remaining power to achieve real-time routing in WSN. RTLD almost avoid routing holes problem by using the remaining power as a parameter of forwarding to distribute the forwarding load to all forwarding candidates.