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.
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.
No comments:
Post a Comment