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 Distributed and Cooperative Link Scheduling for Large-Scale Multihop Wireless Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2007 Article ID 34716 9 pages doi 2007 34716 Research Article Distributed and Cooperative Link Scheduling for Large-Scale Multihop Wireless Networks Kezhu Hong 1 Yingbo Hua 1 and Ananthram Swami1 2 1 Department of Electrical Engineering University of California Riverside CA 92521 USA 2 Army Research Laboratory 2800 Power Mill Road Adelphi MD 20783 USA Received 9 May 2007 Revised 4 September 2007 Accepted 24 October 2007 Recommended by Z. Liu A distributed and cooperative link-scheduling DCLS algorithm is introduced for large-scale multihop wireless networks. With this algorithm each and every active link in the network cooperatively calibrates its environment and converges to a desired link schedule for data transmissions within a time frame of multiple slots. This schedule is such that the entire network is partitioned into a set of interleaved subnetworks where each subnetwork consists of concurrent cochannel links that are properly separated from each other. The desired spacing in each subnetwork can be controlled by a tuning parameter and the number of time slots specified for each frame. Following the DCLS algorithm a distributed and cooperative power control DCPC algorithm can be applied to each subnetwork to ensure a desired data rate for each link with minimum network transmission power. As shown consistently by simulations the DCLS algorithm along with a DCPC algorithm yields significant power savings. The power savings also imply an increased feasible region of averaged link data rates for the entire network. Copyright 2007 Kezhu Hong 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 In multihop wireless networks there are three major functions that all directly affect the
