Scientific Research Publishing

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=48728#.VKNvE8nQrzE Author(s)   Tomofumi Matsuzawa , Keisuke Shimazu Affiliation(s) Department of Information Sciences, Tokyo University of Science, Tokyo, Japan . Service Operation Division, Internet Initiative Japan Inc., Tokyo, Japan . ABSTRACT Technologies for retransmission control and error correction are available for communications over the Internet to improve reliability of data. For communications that require the data reliability be ensured, TCP, which performs retransmission control, is often employed. However, for environments and services where response confirmation and retransmission are difficult, error correction ...