The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The primary concern of broadband wireless technologies is to provide the end-to-end Quality of Service (QoS) for integrated real-time and non real-time applications. The main focus of the IEEE 802.16d/e MAC layer is to manage the radio recourse in an efficient way. The basic functional blocks of the QoS model are addressed by the standards to support five different types of service classes. However,...
The IEEE 802.16 standard defines MAC and physical layer protocols for broadband wireless access, however it does not specify any scheduling algorithm. In this paper, we propose a RED-based Weighted Fair Priority Queuing algorithm for inter-class scheduling and a channel aware algorithm for intra-class scheduling. Weights of the service classes are adaptive according to the QoS requirements of each...
WiMAX technology is a good candidate to provide broadcast TV services for mobile users because it supports QoS based multicasting functionality. To provide multicast-based TV services over the mobile WiMAX network, a multicast session setup involves both MAC-layer and IP-layer multicast management. However, in mobile environment, IP-layer multicast management entails service interruption due to unreliable...
Being an evolution of IEEE 802.16e, IEEE 802.16j mobile multi-hop relay (MMR) is proposed to gain coverage extension and throughput enhancement. Although the IEEE standard 802.16j-2006 has not been published yet, the second version of 802.16j Draft Standard (802.16j D2) has been released in 2007. In this paper, for the first time, we evaluate the MAC performance of the Draft Standard based on the...
IEEE 802.16/WiMAX is an emerging standard for broadband wireless networks. It operates in both point-to-multipoint (PMP) and mesh modes. In the former, a number of subscriber stations communicate directly with a central base station. Although it supports different traffic classes characterized by distinct QoS requirements, the simplest is the best effort traffic. In this class, the subscriber stations...
In this paper we investigate the impact of self-similar traffic pattern on uplink performance of IEEE 802.16 MAC layer protocol for real time polling (RTPS) and best effort (BE) services in terms of throughput, average delay. Our simulation results show that self similar traffic, compared to traditional traffic pattern such as Poisson traffic produce longer delay and larger probability of request...
Nowadays wireless networks standards, e.g. IEEE 802.16, aim to accommodate diverse QoS requirements for multimedia users. The standard provided four kinds of multimedia data services, associated with QoS parameters and left the QoS scheduling algorithm undefined. In this paper, we propose an adaptive cross physical (PHY) layer and MAC layer scheduling algorithm for IEEE 802.16 BWA system. The proposed...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.