Performance Modeling and Analysis of the IEEE 802.11 Distributed Coordination Function in Presence of Hidden Stations
Hung,Fu-Yi
CAIP Center, ECE Department, Rutgers University
Marsic,Ivan
CAIP Center, ECE Department, Rutgers University
Abstract—In this paper, we propose an analytical model to evaluate the hidden station effect on the performance of the IEEE 802.11 Distributed Coordination Function (DCF). DCF is a random channel-access scheme based on Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) method and the binary slotted exponential backoff procedure to reduce the packet collision. Most collisions are caused by hidden stations because stations cannot sense each other’s transmission and often send packets concurrently, resulting in significant degradation of the network performance. The proposed model generalizes the existing work on 802.11 DCF performance modeling. The performance of our model is evaluated by comparison with NS-2 simulations. The impact of different parameters, such as the number of station, packet size and initial backoff window size, is also considered.
Fu-Yi Hung is a Ph.D. program student in the Electrical and Computer Engineering of Rutgers, the State University of New Jersey. He is an IEEE student member. His research interests include mobile ad hoc networks, sensor networks, wireless mesh networks and next-generation wireless networks. His current work is on the performance analysis and design of multi-hop wireless ad hoc network.