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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: Performance analysis of distributed cluster-based MAC protocol for multiuser MIMO wireless networks | Ettefagh et al. EURASIP Journal on Wireless Communications and Networking 2011 2011 34 EURASIP Journal on . http jwcn.eurasipjournals.eom content 2011 1 34 Wireless Communications and Networking a SpringerOpen Journal RESEARCH Open Access Performance analysis of distributed cluster-based MAC protocol for multiuser MIMO wireless networks Azadeh Ettefagh Marc Kuhn Celal E li and Armin Wittneben Abstract It is known that multiuser multiple-input multiple-output MIMO communication can enhance the performance of wireless networks. It can substantially increase the spectral efficiency of wireless networks by utilising multiuser interference rather than avoiding it. This paradigm shift has most impact on the medium access control MAC protocol because most existing MAC protocols are designed to reduce the interference. In this article we propose a novel cluster-based carrier sense multiple access with collision avoidance CB-CSMA CA scheme. The proposed scheme enables multiuser MIMO transmissions in wireless local area networks WLANs by utilising the multiuser interference cancellation capability of the physical layer. In this article we focus on the performance analysis of CB-CSMA CA. We investigate saturation throughput applying optimum backoff parameters and in the presence of synchronisation errors. Furthermore we study the impact of different clustering methods on non-saturation throughput. We show that CB-CSMA CA improves throughput significantly compared to the CSMA CA scheme used in the IEEE 802.11 system. It is a promising approach for a variety of network configurations including typical infrastructure WLANs as well as many other wireless cooperative networks. Keywords Cluster-based CSMA CA Cooperative wireless networks MIMO WLAN Infrastructure network Clustering I. Introduction Multiuser multiple-input multiple-output MIMO communication is an effective approach to improve the performance of a wireless system by realising distributed spatial multiplexing and or .
