OLSR Fuzzy Cost (OLSR-FC): uma extensão ao protocolo OLSR baseada em lógica Fuzzy e aplicada à prevenção de nós egoístas
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2014-06-05
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Universidade Federal de Goiás
Resumo
This work contributes with an extension to the Optimized Link State Routing protocol
(OLSR) called Fuzzy Cost OLSR (OLSR-FC). In order to prevent selfish nodes as well as
to improve the traffic flow over Mobile Ad-hoc Networks (MANETs), the routing metrics
implemented in OLSR-FC make use of a Fuzzy Inference System (FIS) composed of 8
inference rules. Aiming at the choose of paths with low packet loss, better energy capacity
and high connectivity, OLSR-FC implements a procedure of election of routes that takes
into account the following parameters: Packet Loss Index (PLI), Residual Energy (RE)
and Connectivity Index (CI). The OLSR-FC was evaluated by simulation through the NS-
2, in which two scenarios were implemented: a static one with 10 nodes (in testing phase),
and a mobile one with up to 50 nodes. In the former scenario, a comparison was made
between OLSR-FC and the original OLSR protocol which results showed that OLSR-FC
overcomes OLSR in terms of throughput the packet loss. In the latter scenario, besides the
original OLSR protocol, OLSR-FC was also faced up with the OLSR-ETX, OLSR-ML and
OLSR-MD extensions in terms of the following performance metrics: throughput, energy
consumption, packet loss rate, overhead, delay end-to-end, jitter, and packet delivery rate.
In this context, results pointed that OLSR-FC achieved better performance in scenarios
with a maximum of 10% of selfish nodes in comparison with every OSLR extension
and the OLSR. Besides, by evaluating the main network performance metrics, such as
throughput and delivery packet rate, OLSR-FC achieved eleven favorable cases against
five cases in comparison with OLSR protocol.
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JOSÉ, Diógenes Antonio Marques. OLSR Fuzzy Cost (OLSR-FC): uma extensão ao protocolo OLSR baseada em lógica Fuzzy e aplicada à prevenção de nós egoístas. 2014. 173 f. Dissertação (Mestrado em Ciência da Computação) - Universidade Federal de Goiás, Goiânia, 2014.