Worldwide Interoperability for Microwave Access (WiMAX) is a wireless network that has been designed to serve all types of traffic over network. In this paper, we propose a new distributed model to improve Quality of Service (QoS) with respect to delay in fixed WiMAX network to deliver the best services for WiMAX users. Also in the paper, the WiMAX delay at base station is analyzed and compared...

Wireless Metropolitan Area Networks based on IEEE 802.16 standards are in the deployment phase in many countries. In fact, this technology can deliver high data rate while covering long distances, being a suitable candidate to solve the problem of digital divide and thus being able to provide connectivity in isolated and impervious areas. This paper presents the results of the EU Integrated Pro...

Broadband Wireless Access (BWA) has emerged as a promising solution for providing last mile internet access technology to provide high speed internet access to the users in the residential as well as in the small and medium sized enterprise sectors. IEEE 802.16e is one of the most promising and attractive candidate among the emerging technologies for broadband wireless access. The emergence of ...

Este trabajo describe el diseño de un arreglo antenas microstrip con parches en forma elipse dual band para aplicaciones Wi-Fi y WiMAX. El consta 4 elementos se fabrica sobre sustrato dieléctrico cuya permitividad dieléctrica es ϵ = 4.4 grosor 1.6mm. Inicialmente los resultados la simulación parámetros básicos antena como: perdida retorno, impedancia entrada, ancho banda patrones radiación; Pos...

IEEE 802.16 (WiMAX) aims to present high speed wireless access to cover wide range coverage. The base station (BS) and the subscriber station (SS) are the main parts of WiMAX. WiMAX uses either Point-to-Multipoint (PMP) or mesh topologies. In the PMP mode, the SSs connect to the BS to gain access to the network. However, in the mesh mode, the SSs connect to each other to gain access to the BS. ...

WiMAX (Worldwide Interoperability for Microwave Access) is a promising technology which can offer high speed voice, video and data services upto the requirements at the customer’s end. The objectives of this paper is to evaluate the Performance evaluation of a WiMAX system under various diversity schemes (Selection combining, Maximal ratio combining and Equal gain combining), employing differen...

Multiple antenna systems can offer significant improvements in system performance due to their ability to exploit multipath signal propagation and take advantage of its random nature in order to achieve diversity or spatial multiplexing gain. As such, they are very suitable for implementation in WiMAX (Worldwide Interoperability for Microwave Access) systems to improve its performance in harsh ...

The IEEE 802.16 Worldwide Interoperability for Microwave Access (WiMAX) standard is widely used for fixed and mobile Internet access. WiMAX provides maximum data rate of 75 Mbps and high-speed Internet access to a wide range of devices used by clients over the last mile. Asymmetric Digital Subscriber Line (ADSL) is widely used to provide guaranteed service. In this paper, we compare performance...

In this paper we will review the basic mechanisms used in WiMAX networks to support quality of service guarantees. An outline of the various approaches has been proposed and involved tradeoffs have also been discussed. The various architecture and scheduling mechanism proposed to improve quality of service in WiMAX networks have also been discussed. Then the different type of service flows in W...

The heterogeneous interface for the mobile node is the key feature for the next generation mobile world. It provides the flexibility for the mobile devices for moving devices to the next available best network for high data rate connection. So it is firstly important to develop in ns2 for the research and educational purposes. It is very important to develop it in ns2 so that we can do experime...