tailieunhanh - Báo cáo hóa học: " Research Article Connectivity-Based Reliable Multicast MAC Protocol for IEEE 802.11 Wireless LANs"

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 Connectivity-Based Reliable Multicast MAC Protocol for IEEE Wireless LANs | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2009 Article ID 968408 6 pages doi 2009 968408 Research Article Connectivity-Based Reliable Multicast MAC Protocol for IEEE Wireless LANs Woo-Yong Choi Department of Industrial and Management Systems Engineering Dong-A University 840 Hadan2-dong Saha-gu Busan 604-714 South Korea Correspondence should be addressed to Woo-Yong Choi wychoi77@ Received 19 May 2009 Revised 19 August 2009 Accepted 8 October 2009 Recommended by Sayandev Mukherjee We propose the efficient reliable multicast MAC protocol based on the connectivity information among the recipients. Enhancing the BMMM Batch Mode Multicast MAC protocol the reliable multicast MAC protocol significantly reduces the RAK Request for ACK frame transmissions in a reasonable computational time and enhances the MAC performance. By the analytical performance analysis the throughputs of the BMMM protocol and our proposed MAC protocol are derived. Numerical examples show that our proposed MAC protocol increases the reliable multicast MAC performance for IEEE wireless LANs. Copyright 2009 Woo-Yong Choi. 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 an infrastructure mode IEEE wireless LAN the STAs Stations should first transmit their data frames to the AP Access Point when they want to communicate with other STAs in the same wireless LAN or the nodes in an external network. The AP relays the data from the STAs and the external network through the distribution system. For this reason we can consider the AP to be the only place where the multicast data transmission is actually performed. The fundamental IEEE MAC protocols DCF Distributed Coordination Function and PCF Point Coordination Function provide the