An extremely reliable source to sink communication is required for most of the contemporary WSN applications especially pertaining to military, healthcare and disaster-recovery. However, due to their intrinsic energy, bandwidth and computational constraints, Wireless Sensor Networks (WSNs) encounter several challenges in reliable source to sink communication. In this paper, we present a novel reliable topology that uses reliable hotlines between sensor gateways to boost the reliability of end-to-end transmissions. This reliable and efficient routing alternative reduces the number of average hops from source to the sink. We prove, with the help of analytical evaluation, that communication using hotlines is considerably more reliable than traditional WSN routing. We use reliability theory to analyze the cost and benefit of adding gateway nodes to a backbone-assisted WSN. However, in hotline assisted routing some scenarios where source and the sink are just a couple of hops away might bring more latency, therefore, we present a Signature Based Routing (SBR) scheme. SBR enables the gateways to make intelligent routing decisions, based upon the derived signature, hence providing lesser end-to-end delay between source to the sink communication. Finally, we evaluate our proposed hotline based topology with the help of a simulation tool and show that the proposed topology provides manifold increase in end-to-end reliability.
Many anticipated deployment scenarios, in particular military, healthcare, and disaster-recovery applications, of Wireless Sensor Networks (WSNs) require reliable source to sink communication. Since transmission range of sensors is quite limited, to achieve higher end-to-end transmission reliability, WSNs generally employ intermediate backbone links (wired or wireless) that can deliver packets at larger distances. In this paper, we evaluate the reliability of backbone-assisted routing and dissemination in WSNs. In particular, we use reliability theory to investigate two important problems: a) if sensor node to backbone/gateway node ratio is fixed in a unit area, what is the maximum achievable reliability? b) How many wired hops or gateway nodes are required to achieve a given reliability? Finally we analyze the cost and benefit incurred by adding gateway nodes to a backbone-assisted WSN and observe that after a certain threshold adding more backbone nodes to the WSN provides negligible improvement in the overall end-to-end reliability.
The cost-effectiveness of the operation of Wireless Sensor Network (WSN) in manufacturing and administrative projects can highly boost the production of lower goods and services that in turn enhance the marketing ability. The lifetime increase of the batteries by reducing energy wastage is the main challenge and hence, in the current paper, there is an attempt to save energy via transmitting packets as quickly as can be expected while avoiding congestion and drop packets. The time synchronization allows nodes to sleep and wake at the same time to avoid consuming energy. The suggested algorithm, would, successfully deliver a packet with a fairly high rate and reduce dropping packets. Besides, it manages to avoid congestion and saves energy when reduce the retransmission the dropped packets.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.