Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=12#.VNMu4SzQrzE Author(s)    Haider M. ALSABBAGH , Jianping CHEN , Youyun XU Affiliation(s) Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, P.R.China . Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, P.R.China . Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, P.R.China . ABSTRACT In WLANs, stations sharing a common wireless channel are governed by IEEE 802.11 protocol. Many conscious studies have been conducted to utilize this precious medium efficiently. However, most of these studies have been done either under assumption of idealistic channel condition or with unlimited retransmitting number. This paper is devoted to investigate influence of limited retransmissions and error level in the utilizing channel on the network throughput, probability of packet ...

Read  fulll  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=2#.VNMppizQrzE Author(s)  Youssef FAKHRI , Benayad NSIRI , Driss ABOUTAJDINE , Josep VIDAL Affiliation(s) 1University Mohamed V-Agdal Faculty of Sciences, UFR Informatics and Telecommunication B.P. 1014 Rabat, Maroc . Faculty Ain Chok ,UFR Signal Processing ,University Hassan II, B.P. 5366 Casablanca, Maroc . University Mohamed V-Agdal Faculty of Sciences, UFR Informatics and Telecommunication B.P. 1014 Rabat, Maroc . University of Catalonia Dept. of Signal Theory and Communications Campus Nord,Modul D5, C/ Jordi Girona 1-3, Espagne . ABSTRACT This paper presents a scheduling scheme for packet transmission in OFDM wireless system with adaptive techniques.The concept of efficient transmission capacity is introduced to make scheduling decisions based on channel conditions.We present a mathematical technique for determining the optimum transmission rate, packet s...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53719#.VNByFSzQrzE Author(s)    Faisal Shahzad 1 , Muhammad Faheem Mushtaq 1 , Saleem Ullah 1* , M. Abubakar Siddique 2 , Shahzada Khurram 1 , Najia Saher 1   Affiliation(s) 1 Department of Computer Science & IT, The Islamia University of Bahawalpur, Bahawalpur, Pakistan . 2 College of Computer Science, Chongqing University, Chongqing, China . ABSTRACT In this paper, we have used the distributed mean value analysis (DMVA) technique with the help of random observe property (ROP) and palm probabilities to improve the network queuing system throughput. In such networks, where finding the complete communication path from source to destination, especially when these nodes are not in the same region while sending data between two nodes. So, an algorithm is developed for single and multi-server centers which give more interesting and successful result...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=49256#.VJD04snQrzE Author(s)   Mohammad A. Al-Rababah Affiliation(s) Northern Border University, Arar, KSA . ABSTRACT Data centre is the consolidation point for provisioning multiple services that drive an enterprise business processes. A discrete event based process model of a reengineered data centre communication network comprising of four data centre LAN nodes with an inclusion of a virtualization server for creating virtual instances of resources and applications for DCN nodes was analyzed and presented. This is reflected in the response of the two options: crash recovery (DCN) disaster recovery and cloud in the cloud data ce...