AlexSSS
2012-04-09, 09:34 PM
Performance Modelling and Bandwidth Management of WiMAX Systems
Abstract—Worldwide Interpretability for Microwave Access
(WiMAX) is a competitive connection oriented technology for
metropolitan broadband wireless access with very high data rate,
large service coverage and flexible quality of service (QoS). Due
to the large number of connections, the efficient bandwidth
management and related channel allocation for the uplink access
in WiMAX networks is a very challenging task of the medium
access control (MAC) protocol. In order to provide better
bandwidth utilization and network throughput, a cost-effective
WiMAX bandwidth management scheme is devised, named as
the WiMAX partial sharing scheme (WPSS) and compared
against a simpler scheme, named as the WiMAX complete
sharing scheme (WCPS). An analytic maximum entropy (ME)
model is proposed for the cost-effective performance evaluation
of the two bandwidth management schemes associated with
networks with a large number of stations and/or the connections.
In this context, an open queueing network model (QNM) is
devised, consisting of interacting queues with multiple service
classes and closed form expressions for the state and blocking
probability distributions are derived. Typical numerical
examples are employed to verify the credibility of the analytic
ME solutions against simulation results at 95 % confidence
intervals. Moreover, it is shown that the WPSS can significantly
improve the networks performance in comparison to that of the
WCPS.
no pass
Please Add Reputation, Thanks!
Abstract—Worldwide Interpretability for Microwave Access
(WiMAX) is a competitive connection oriented technology for
metropolitan broadband wireless access with very high data rate,
large service coverage and flexible quality of service (QoS). Due
to the large number of connections, the efficient bandwidth
management and related channel allocation for the uplink access
in WiMAX networks is a very challenging task of the medium
access control (MAC) protocol. In order to provide better
bandwidth utilization and network throughput, a cost-effective
WiMAX bandwidth management scheme is devised, named as
the WiMAX partial sharing scheme (WPSS) and compared
against a simpler scheme, named as the WiMAX complete
sharing scheme (WCPS). An analytic maximum entropy (ME)
model is proposed for the cost-effective performance evaluation
of the two bandwidth management schemes associated with
networks with a large number of stations and/or the connections.
In this context, an open queueing network model (QNM) is
devised, consisting of interacting queues with multiple service
classes and closed form expressions for the state and blocking
probability distributions are derived. Typical numerical
examples are employed to verify the credibility of the analytic
ME solutions against simulation results at 95 % confidence
intervals. Moreover, it is shown that the WPSS can significantly
improve the networks performance in comparison to that of the
WCPS.
no pass
Please Add Reputation, Thanks!