PROJECT TITLE :
New Reservation Multiaccess Protocols for Underwater Wireless Ad Hoc Sensor Networks
In a wireless network, where propagation delay is high and communications are sporadic, some reasonably reservation protocol is usually used. Reservation access protocols were proposed earlier in earth stations-to-satellite communication with known propagation delay. However, optimality of the quantity of access slots with respect to the system performance parameters, like system utilization, blocking chance, and delay, were not thoroughly studied. Besides, the impact of propagation delay uncertainty, that predominantly happens in underwater communications, are nevertheless to be addressed. During this paper, we initial analyze the system performance in many-to-one multiaccess data transfer state of affairs in underwater wireless ad hoc sensor networks with a mounted variety of access slots and with the idea of perfect propagation delay information. We propose two system state aware dynamic approaches to suitably regulate the quantity of access slots, and investigate the optimum slotting strategy to maximise the system utilization. Next, by accounting the propagation delay uncertainty, we tend to relook into the optimality criteria on the quantity of access slots, where we apply a changed receiver-synchronized slotted Aloha principle to maximize the access performance. Via mathematical analysis, supported by discrete event simulations, we show that the system utilization and blocking chance performances with our proposed dynamic reservation protocols are consistently better compared to the competitive reservation protocols with mounted as well as variable access slots. Further, we tend to conduct NS3 simulations to review the protocol performances under additional realistic channel and traffic conditions, which also demonstrate that the proposed optimized dynamic slotting offers a much higher system utilization performance compared to an identical underwater reservation multiaccess protocol.
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