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The Institute of Electrical and Electronics Engineers (IEEE) 802.16 standard is a real revolution
in wireless metropolitan area networks (WirelessMANs) that enables high-speed
access to data, video, and voice services. Worldwide Interoperability for Microwave
Access (WiMAX) is the industry name given to the 802.16-2004 amendment by the vendor
inter...
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WiMAX and WiFi are the two proliferating wireless technologies with different physical and Media Access Control (MAC) layers. Today, WiFi radio is present in almost all the devices, and most of the devices are equipped with WiMAX radio. Both these technologies can be utilized, if the devices are equipped with both of them, to improve the performanc...
Citations
... Orthogonal Frequency Division Multiplexing (OFDM) and Orthogonal Frequency Division Multiple Access (OFDMA)[5] ...
... The numerical results are provided in section V. And [5]. ...
IEEE 802.16 standard provides a broadband wireless access solution. WiMAX (Worldwide interpretability for microwave access) is the business definition of the 802.16-2004 amendment. In WiMAX, quality of service (QoS) is provided through both classification and scheduling of the four different types of traffic classes defined by the standard. Each class has it own bandwidth requirements as well as its level of QoS, which has to be maintained. In this paper, we provide a performance analysis of three types of connections defined in the standard (UGS, rtPS, nrtPS). Different levels of priority and blocking probability are assigned to each class of service. This performance analysis has been done using an analytical model for evaluating admission control (AC) for the previous mentioned classes in WiMAX network.
With the diversity of services and the need of
different traffic classes in wireless networks, WIMAX technology
(Worldwide Interoperability for Microwave Access), has been
developed as a broadband wireless access technology based on
IEEE standard 802.16. Indeed, this technology is able to mix
real time and non real time services with the definition of service
classes. To improve the admission rate of the different classes
when implementing the admission control component, we propose
in this paper a traffic scheduling based on WRR policy and a new
mechanism to handle the rejected requests. Finally, we provide
the Markov Chain based modelling of our solution and compute
thereof primary performance evaluation results.
WiMAX (worldwide interpretability for microwave access) is one of the leader standards of broadband wireless access (BWA). This standard becomes a competitor of 4G or LTE (long term evolution) with the introduction of different class of service flow (UGS, rtPS, nrtPS, BE). Each service class has its own QoS requirements. Even if the standard specify the transmission policy of each service class, it recommends the implementation of an admission control (AC) without any specification. As the standard does not define any specifications for the AC, then this task is left for the operator. In this paper, we propose an implementation of an AC algorithm mechanism for IEEE 802.16. The performance evaluation of these networks by analytical models is not easy due to the state space explosion, thus we use the stochastic automata networks (SAN) formalism to model our proposed AC mechanism. With SAN we calculate the rewards of the proposed AC and we show that the proposed solution is efficient.
