Reinaldo B. Braga,  Danilo M. Taveira,  Otto Carlos M. B. Duarte. 

Ad hoc networks rely on node cooperation to perform routing and data forwarding. Therefore, nodes with selfish behavior can benefit from this cooperation to drop packets, decreasing the network performance. One of the main challenges is to correctly detect the selfish nodes, since false positives can be generated due to temporary problems in ad hoc networks. This paper presents the MAPA, a mechanism that performs evaluations and punishments of selfish nodes based on the results of detections localy collected only. Finally, the mathematical analysis and simulations show that the MAPA is efficient on evaluations and punishments to the selfish nodes, decreasing the number of false positives and improving the network delivery rate.

http://www.lbd.dcc.ufmg.br:8080/colecoes/sbrc/2008/047.pdf

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