A trust approach for node cooperation in MANET

  • Authors:

  • Kun Wang;Meng Wu

  • Affiliations:

  • College of Communication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing, China;College of Communication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing, China

  • Venue:
  • MSN'07 Proceedings of the 3rd international conference on Mobile ad-hoc and sensor networks
  • Year:
  • 2007

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Abstract

In MANET, Node misbehavior due to selfish or malicious reasons can significantly degrade the performance of ad hoc networks. To cope with misbehavior in such self-organized networks, an incentive mechanism must be in place. In this study, a trust-based incentive model on a self-policing mechanism is proposed to make collaboration rational for selfish/malicious nodes. This trust system makes them evaluate the trust of their neighbor locally to mitigate contamination by direct observation and the use of second-hand information available. In our approach, every node maintains a trust rating about every node else they care about. Meanwhile, trust fading and redemption are brought about by update and re-establishment of the trust to show robustness. Performance by simulation reveals that in the case of existing malicious nodes, Dynamic Source Routing (DSR) with proposed trust-based node incentive mechanism performs better than DSR in terms of packet successful delivery ratio and mean number of packets dropped.