Adaptive anomaly control for alleviating the exclusive channel occupation in wireless networks

Abstract

In wireless local area networks, interframe space is determined according to the type of transmission frame in order to perform effective transmission and collision avoidance using carrier sense multiple access/collision avoidance (CSMA/CA) mechanism and to attempt transmission after backoff time. In carrier sense multiple access/collision avoidance mechanism, however, each node individually determines the interframe space according to the transmission frames and randomly selects the backoff time; thus, the nodes can be selfish, which reduces the interframe space or backoff time in order to increase the channel occupation rate. This increase leads to an increase in bandwidth in channels dominated by such selfish nodes and a decrease in bandwidth of other nodes. After all, to prevent exclusive channel occupation and to guarantee fair channel access, it is necessary to establish detection and control schemes for selfish nodes. We propose misbehavior detection and control scheme for use in media access control layers, which involves comparison of the channel occupation rates of all nodes and a selective control scheme using a network allocation vector clearing method. We also validate the misbehavior detection and control scheme through extensive simulation. , he has been a researcher at the Central R&D Laboratory of KT Corporation in Korea. His current research interests include specifying software requirement, design and implementation based on the formal logic, secure software, software assurance, wireless network security, future network for wireless LAN/PAN, and machine-to-machine communications.

Distributed Interference-aware Medium Access Control for IEEE 802.15.7 Visible Light Communications

“…To improve the spatial efficiency, the centralized approaches for adaptive MAC can be adopted for VLC. (8,9) In these approaches, the single central controller collects information on devices in the vicinity to determine and assign the contention window (CW). However, the centralized approach has many disadvantages, such as cost-inefficient maintenance and low robustness in the case of network failure.…”