Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Cross-Layer Quality-of-Service Analysis and Call Admission Control in the Uplink of CDMA Cellular Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2006 Article ID 62657 Pages 1-14 DOI WCN 2006 62657 Cross-Layer Quality-of-Service Analysis and Call Admission Control in the Uplink of CDMA Cellular Networks Chun Nie 1 2 Yong Huat Chew 1 and David Tung Chong Wong1 1 Institute for Infocomm Research Agency for Science Technology and Research Singapore 119613 2 Department of Electrical and Computer Engineering National University of Singapore Singapore 117576 Received 26 September 2005 Revised 16 March 2006 Accepted 26 May 2006 This paper addresses cross-layer quality-of-service QoS provisioning in the uplink of CDMA cellular mobile networks. Each mobile can take up to four UMTS traffic classes in our model. At the data link layer and the network layer the QoS performances are defined in terms of signal-to-interference-plus-noise ratio and outage probability and packet loss rate and delay respectively. A call admission control scheme which fulfills these QoS metrics is developed to maximize the system capacity. The novelty of this paper is that the effect of the lengthening of the on-periods of non-real-time traffic classes is investigated by using the Go-Back-N automatic retransmission request mechanism with finite buffer size and limited number of retransmissions in the event of transmission errors. Simulation results for a specific example demonstrate the reasonableness of the analytical formulation. Copyright 2006 Chun Nie et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION The currently deployed universal mobile telecommunications system UMTS network is characterized by its ability to support multimedia communications with different bit rates and quality-of-service QoS requirements. Four traffic classes conversational streaming .
