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MAC-LAYER SELFISH MISBEHAVIOR IN IEEE 802.11 AD HOC NETWORKS:SELFISH MISBEHAVIOR

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SELFISH MISBEHAVIOR SELFISH MISBEHAVIOR

                         In ad hoc networks, selfish nodes deviating from the standard MAC (Medium Access Control) protocol can significantly degrade normal nodes’ performance and are usually difficult to detect. In this paper, we propose detection and defense schemes to identify and defend against MAC-layer selfish misbehavior, respectively, in IEEE 802.11 multi-hop ad hoc networks. Specifically, the non-deterministic nature of the IEEE 802.11 MAC protocol imposes great challenges to distinguishing selfish nodes from well-behaved nodes. Most traditional selfish misbehavior detection approaches are for wireless local area networks (WLANs) only. They either rely on a large amount of historical data to perform statistical detection, or employ throughput or delay models that are only valid in WLANs for detection. In contrast, we propose a realtime selfish misbehavior detection scheme for multi-hop ad hoc networks. It requires only several samples, and hence is more efficient and can adapt to channel dynamics more quickly. 


MAC-LAYER SELFISH MISBEHAVIOR IN IEEE 802.11 AD HOC NETWORKS:SELFISH MISBEHAVIOR 

                                    Communication protocols are usually designed under the assumption that all participants would comply with the regulations. However, in untrusted communication environments, a misbehaving user can deviate from the regulations and cause damage to or obtain performance gain over other honest parties. Thus, trustworthy communication is a crucial issue, especially in wireless ad hoc networks where nodes need to fully cooperate with each other to ensure correct route establishment, successful packet delivery, and efficient resource usage. Traditional approaches to providing network security are mostly cryptography based.


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