Mobile WiMAX (Worldwide Interoperability Microwave Access) requires the re-authentication of mobile stations as they change from one base station to another. IEEE 802.16e uses the Extensible Authentication Protocol (EAP) for authentication and key management. This requires about 1000 ms, therefore, it could not support mobile WiMAX applications such as video conference. In the present paper, we...

With the fast proliferation of mobile Internet, the wireless community has been increasingly looking for a framework that can provide seamless mobility. In this paper, we propose a fast cross-layer handover scheme based on movement prediction in mobile WiMAX environment. Prediction is achieved by linear regression model with keeping track of the signal strength of mobile users. With the help of...

The integration of WiMAX and WLAN has been seen as a promising approach towards fourth generation (4G). Vertical handoff plays important role while integration of WiMAX and WLAN heterogeneous overlay systems. Vertical handoff is preformed on the basis of Quality of Service (QoS) metrics of the two heterogeneous networks. A Seamless handoff scheme is based on the tightly coupled architecture so ...

Due to characteristics such as: multicast support, wide coverage range, high bandwidth and mobility support, WiMAX could be a leading solution to deliver bandwidthhungry IPTV services to mobile users. Mobile multi-hop relay (MMR) was proposed as an amendment of the current mobile WiMAX standard to provide relaying capabilities. Relays are deployed as a cost-effective solution to extent coverage...

At present, telecommunication industries are highly concerned with the wireless transmission of data which can use various transmission modes, from pointto-multipoint links. It contains full mobile internet access. Various applications have already been applied so far using WiMAX, as alternative to 3G mobile systems in developing countries. The paper built a simulation model based on 802.16 OFD...

While WiMAX handoff characteristics and quality of service (QoS) provisioning have been explored by many network researchers, the effect of traffic type, node mobility and network size on WiMAX has not been fully explored yet. This paper therefore reports on a study of the impact of traffic type and node mobility on the performance of a typical mobile 802.16 WiMAX for varying network sizes. The...

The WiMAX technology offers a versatile mobile services platform, which enables operators to provide differential Quality of Service (QoS) for fulfilling subscribers’ various requirements. WiMAX operators need to allocate enough resources to make all subscribers satisfied to avoid “user churn” that subscribers will unsubscribe services due to dissatisfaction with allocated resources. This resou...

In this paper we study the factors influencing system bandwidth capacity in IEEE 802.16e networks. Additionally, we investigate and evaluate the system capacity of 802.16j in order to understand how the relay architecture can lead to capacity increases in the downlink. An analytical study of the WiMAX propagation channel by using Cost-231 Hata Model is presented. This model performed in differe...

In today’s competitive environment, operators are focused on improving the value of their network as well as the user experience. By enhancing the main components of any SLA (Service Level Agreement) – coverage, capacity and QoS (Quality of Service) – Mobile WiMAX provides operators with a highly reliable and affordable technology for delivering next-generation wireless broadband services. AASs...

Deficit Round Robin (DRR) is a fair packet-based scheduling discipline commonly used in wired networks where link capacities do not change with time. However, in wireless networks, especially wireless broadband networks, i.e., IEEE 802.16e Mobile WiMAX, there are two main considerations violate the packet-based service concept for DRR. First, the resources are allocated per Mobile WiMAX frame. ...