Nowadays we have heterogeneous wireless environment with several wireless access technologies which can provide to the users seamless and continuous Quality of Service. For real-time applications is crucial to have satisfying QoS during vertical handovers between different wireless and mobile networks, for different velocities of the mobile users. In this paper we propose a solution for improvi...

We present a simple analytical method for capacity evaluation of IEEE 802.16e Mobile WiMAX networks. Various overheads that impact the capacity are explained and methods to reduce these overheads are also presented. The advantage of a simple model is that the effect of each decision and sensitivity to various parameters can be seen easily. We illustrate the model by estimating the capacity for ...

with the increasing demand for mobile data services, Broadband Wireless Access (BWA) is emerging as one of the fastest growing areas within mobile communications. Innovative wireless communication systems, such as WiMAX, are expected to offer highly reliable broadband radio access in order to meet the increasing demands of emerging high speed data and multimedia services. In Ghana, deployment o...

The era of entirely wireless, mobile communication is rapidly approaching. Increasingly, consumers are demanding versatile and convenient modes of communication that are available whenever they want, wherever they are; all of this without losing performance and efficiency. On the other hand, the demand for high-speed broadband and technology with less energy costs are growing side-by-side. The ...

Ever increasing demands of users and rapid development of telecommunication technologies have led to the evolution of 4G heterogeneous wireless network. Further, 4G with heterogeneous network environment will provide features such as seamless internet connectivity between different wireless networks, “Always Best Connected” service and “Anywhere Anytime Service”. Due to the different characteri...

1389-1286/$ see front matter 2011 Elsevier B.V doi:10.1016/j.comnet.2011.04.018 ⇑ Corresponding author. E-mail addresses: [email protected] (R. Kunst) (C.B. Both), [email protected] (L.Z. Granville), ju Rochol). Burst and AWGN errors affect mobile WiMAX networks because of propagation conditions generally resulting from the mobility characteristics. Mobile WiMAX networks are inherently v...

Nowadays, one of the most important challenges in heterogeneous networks is the connection consistency between the mobile station and the base stations. Furthermore, along the roaming process between the mobile station and the base station, the system performance degrades significantly due to the interferences from neighboring base stations, handovers to inaccurate base station and inappropriat...

Energy management strategy is an indispensable component in the emerging IEEE 802.16e mobile WiMAX because Mobile Subscriber Stations are normally powered by a rechargeable battery. In this paper, we propose a new energy saving scheme by adjusting the sleep windows adaptively. Simulation results indicate that the new policy is able to reduce power consumption significantly with much less increa...

This paper investigates & undertakes simulation based study of Adhoc Routing Protocols in Wi-Fi(802.11b) & WiMax(802.16e) Networks. In this paper comparison of four Routing Protocols AODV,DYMO,OLSR & IERP is done in a multicellular high mobility Wi-Fi & WiMax Networks using QualNet 5.0 Simulator. The metrics used for performance evaluation are Average Jitter, Throughput, End-to End delay, Signa...

Internet generation is growing accustomed to having broadband access wherever they go and not just at home or in the office, which turns mobile broadband into a reality. This paper aims to look for a suitable mobile broadband solution in the South Asian region through comparative analysis in various perspectives. Both WiMAX and LTE are 4G technologies designed to move data rather than voice hav...