The surging demand for fresh information from various Internet of Things (IoT) applications requires oceans data sampled the physical environment to be transmitted and processed timely, which would lead huge energy consumption. We investigate sleep-wake strategies servers in communication systems reduce consumption while guaranteeing timely delivery users. Specifically, we a multi-source single...

This investigation deals with MX/G/1 queueing model with setup, bulk- arrival, loss-delay and balking. The provision of second optional service apart from essential service by an unreliable server is taken into consideration. We assume that the delay customers join the queue when server is busy whereas loss customers depart from the system. After receiving the essential service, the customers m...