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 Research Article Implementation of a Cooperative MAC Protocol: Performance and Challenges in a Real Environment | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2009 Article ID 598140 19 pages doi 2009 598140 Research Article Implementation of a Cooperative MAC Protocol Performance and Challenges in a Real Environment Thanasis Korakis 1 Zhifeng Tao 2 Shashi Raj Singh 1 Pei Liu 1 and Shivendra S. Panwar1 1 Department of Electrical and Computer Engineering Polytechnic Institute of NYU 6 Metrotech Center Brooklyn NY 11201 USA 2Mitsubishi Electric Research Laboratories MERL 201 Broadway Cambridge MA 02139 USA Correspondence should be addressed to Thanasis Korakis korakis@ Received 31 October 2008 Accepted 31 March 2009 Recommended by Xavier Mestre Cooperative communication is an active area of research today. It enables nodes to achieve spatial diversity thereby achieving tremendous improvement in system capacity and delay. Due to its immense potential extensive investigations have been directed to closely examine its performance by means of both analysis and simulation. However the study of this new technology in an implementation-based system is very limited. In this paper we present two implementation approaches to demonstrate the viability of realizing cooperation at the MAC layer in a real environment. The paper describes the technical challenges encountered in each of the approaches details the corresponding solution proposed and compares the limitations and benefits of the two approaches. Experimental measurements are reported which not only help develop a deeper understanding of the protocol behavior but also confirm that cooperative communication is a promising technology for boosting the performance of nextgeneration wireless networks. Copyright 2009 Thanasis Korakis 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 Today .