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 Design and Analysis of Downlink Communications in Cellular CDMA Systems | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2006 Article ID 21297 Pages 1-23 DOI WCN 2006 21297 Cross-Layer Design and Analysis of Downlink Communications in Cellular CDMA Systems Jin Yuan Sun Lian Zhao and Alagan Anpalagan Department of Electrical and Computer Engineering Ryerson University Toronto ON Canada M5B 2K3 Received 1 October 2005 Revised 10 March 2006 Accepted 19 May 2006 A cellular CDMA network with voice and data communications is considered. Focusing on the downlink direction we seek for the overall performance improvement which can be achieved by cross-layer analysis and design taking physical layer link layer network layer and transport layer into account. We are concerned with the role of each single layer as well as the interaction among layers and propose algorithms schemes accordingly to improve the system performance. These proposals include adaptive scheduling for link layer priority-based handoff strategy for network admission control and an algorithm for the avoidance of TCP spurious timeouts at the transport layer. Numerical results show the performance gain of each proposed scheme over independent performance of an individual layer in the wireless mobile network. We conclude that the system performance in terms of capacity throughput dropping probability outage power efficiency delay and fairness can be enhanced by jointly considering the interactions across layers. Copyright 2006 Jin Yuan Sun 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 With the growing demand and popularity of high-speed data applications in wireless networks the system capacity and bandwidth resource become increasingly stringent. Radio resource management plays a key role in wireless system design and analysis. Research .
