Volume 4, Issue 10, 2014

By | August 11, 2018

QoE-Based Scheduling Algorithm in WiMAX Network using Manhattan Grid Mobility Model

Tarik ANOUARI, Computer, Networks, Mobility and Modeling laboratory, Department of Mathematics and Computer, FST, Hassan 1st University, Morocco.
Abdelkrim HAQIQ, e-NGN Research group, Africa and Middle East.

Abstract— WiMAX (acronym for Worldwide Interoperability for Microwave Access) is a family of technical standards based on IEEE 802.16 standard that defines the high speed connection through radio waves unlike DSL (Digital Subscriber Line) or other wired technology. It can provide coverage to remote rural areas of several kilometers in radius, it’s an adequate response to some rural or inaccessible areas. WiMAX can provide point-to-point (P2P) and point-to-multipoint (PMP) modes. In parallel, it was observed that, unlike the traditional assessment methods for quality, nowadays, current research focuses on the user perceived quality, the existing scheduling approaches take into account the quality of service (QoS) and many technical parameters, but does not take into account the quality of experience (QoE). In this paper, we present a scheduling algorithm to provide QoE in WiMAX network under Manhattan Mobility. A new approach is proposed, particularly for the Best Effort (BE) service class WiMAX, in this approach, if a packet loss occurs on a link connection, the system then reduces the transmission rate of this connection to obtain its minimum allowable transmission rate. The NS-2 simulation results show that the QoE provided to users is enhanced in terms of throughput, jitter, packet loss rate and delay.

Keywords-component; WiMAX; QoE; QoS; BE; NS-2.

Moving Virtual University from Traditional Web to Cloud Computing Case Study on Syrian Virtual University

Aktham Mohammad Mahmoud
Syrian Virtual University, Damascus, Syrian Arab Republic.

Abstract— E-learning takes many methods to makes learning concepts easier. With development of Web technologies and increased infrastructure resources (processing, storage) which allows developing techniques and methods of education especially in higher education, one of a web development under name cloud computing. Cloud computing not a new invention but it depends on used techniques (distributed computing and virtualization), cloud concept created new ways for virtual learning by providing a required resources for universities (traditional or virtual), cloud computing provide services to change virtual learning systems concepts to makes each step in virtual learning system easy. What we will see in this paper a cloud computing and traditional web concepts, and what a services provided by cloud to virtual universities by study (Syrian Virtual University) as example, and reviewing some of suggestions to develop (e-learning systems, security policy) of Syrian Virtual University.

Keywords- e-learning; cloud computing; Mobile web; SaaS; virtual laboratories.

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