TITLE:
A Self-Similar Call Admission Control Algorithm in WiMAX
AUTHORS:
Yongdong Hu, Guoxin Wu
KEYWORDS:
WiMAX, CAC, Self-Similar, Effective Bandwidth, QoS
JOURNAL NAME:
International Journal of Communications, Network and System Sciences,
Vol.9 No.5,
May
30,
2016
ABSTRACT:
Modelling WiMAX network traffic based on
the self-similarity character is better than the traditional model based on the
Poisson process, because the former can provide more accurate calculation for
effective bandwidth. In this paper we propose a WiMAX network traffic model
based on M/Pareto model to describe its self-similarity character. Then we
deduce the average transmission rate and the variance coefficient for the FBM
traffic model by the M/Pareto model, and get the Hurst parameter of the FBM
traffic model by statistical analysis method. By the FBM traffic model we get a
formula for calculating the effective bandwidth. Accordingly, we propose a
modified self-similar call admission control algorithm (SS-CAC). SS-CAC can
avoid measuring the parameter values of FBM traffic flow to do call admission
control. Simulation results show that SS-CAC greatly reduces the call blocking
rate and improves the bandwidth utilization.