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Link Quality and Energy Aware Geographical Routing in MANETs using Fuzzy Logics

Mishra P., Gandhi C., Singh B.

Journal of Telecommunications and Information Technology

2016

nr 3

5--17

In literature, varieties of topology and geographical routing protocols have been proposed for routing in the MANETs. It is widely accepted that the geographical routings are a superior decision than topological routings. Majority of geographical routing protocols assume an ideal network model and choose the route that contains minimum number of hops. However, in reality, nodes have limited battery power and wireless links are additionally unreliable, so they may highly affect the routing procedure. Thus, for reliable data transmission, condition of the network such as link quality and residual energy must be considered. This paper aims to propose a novel multi-metric geographical routing protocol that considers both links-quality and energy metric along with progress metric to choose the next optimal node. The progress is determined by utilizing greedy as well as compass routing rather than pure greedy routing schemes. To combine these metrics, fuzzy logics are used to get the optimal result. Further, the protocol deals with “hole” problem and proposes a technique to overcome it. Simulations show that the proposed scheme performs better in terms of the packet delivery ratio, throughput and residual energy than other existing protocols.

New trends in supply chain management and their comparison & integration

Lenort R., Wicher P.

Logistyka

2012

nr 2

This article examines, describes and compares new trends in strategic supply chain management of industrial companies. The increasing globalization and increased uncertainty and risks in the business environment gave birth to new approaches intended to protect the supply chain and to exploit new market opportunities. The basic trends include agile and resilient supply chains. Both of these concepts are trying to complement and enhance the heavily used approach of lean supply chain that starts facing problems in the above described conditions.