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: Research Article Combined Rate and Power Allocation with Link Scheduling in Wireless Data Packet Relay Networks with Fading Channels | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2007 Article ID 24695 17 pages doi 2007 24695 Research Article Combined Rate and Power Allocation with Link Scheduling in Wireless Data Packet Relay Networks with Fading Channels Minyi Huang1 2 and Subhrakanti Dey2 1 Department of Information Engineering Research School of Information Sciences and Engineering The Australian National University Canberra ACT 0200 Australia 2 Department of Electrical and Electronic Engineering University of Melbourne Parkville 3010 Victoria Australia Received 19 November 2006 Revised 22 May 2007 Accepted 19 June 2007 Recommended by Lin Cai We consider a joint rate and power control problem in a wireless data traffic relay network with fading channels. The optimization problem is formulated in terms of power and rate selection and link transmission scheduling. The objective is to seek high aggregate utility of the relay node when taking into account buffer load management and power constraints. The optimal solution for a single transmitting source is computed by a two-layer dynamic programming algorithm which leads to optimal power rate and transmission time allocation at the wireless links. We further consider an optimal power allocation problem for multiple transmitting sources in the same framework. Performances of the resource allocation algorithms including the effect of buffer load control are illustrated via extensive simulation studies. Copyright 2007 M. Huang and S. Dey. 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 Recently there has been a growing research interest in traffic relay in wireless networks 1-7 . Relaying is regarded as a promising means for supporting high data rate transmission in 4G systems where users may be separated from the .
