摘要
The performance of three wireless local-area network(WLAN) media access control(MAC) protocols is investigated and compared in the context of simulcast radioover-fiber-based distributed antenna systems(RoF-DASs) where multiple remote antenna units(RAUs) are connected to one access point(AP) with different-length fiber links.The three WLAN MAC protocols under investigation are distributed coordination function(DCF) in basic access mode,DCF in request/clear to send(RTS/CTS) exchange mode,and point coordination function(PCF).In the analysis,the inter-RAU hidden nodes problems and fiber-length difference effect are both taken into account.Results show that adaptive PCF mechanism has better throughput performances than the other two DCF modes,especially when the inserted fiber length is short.
The performance of three wireless local-area network（WLAN） media access control（MAC） protocols is investigated and compared in the context of simulcast radioover-fiber-based distributed antenna systems（RoF-DASs） where multiple remote antenna units（RAUs） are connected to one access point（AP） with different-length fiber links.The three WLAN MAC protocols under investigation are distributed coordination function（DCF） in basic access mode,DCF in request/clear to send（RTS/CTS） exchange mode,and point coordination function（PCF）.In the analysis,the inter-RAU hidden nodes problems and fiber-length difference effect are both taken into account.Results show that adaptive PCF mechanism has better throughput performances than the other two DCF modes,especially when the inserted fiber length is short.
基金
supported in part by National 973 Program(2012CB315705)
NSFC Program(61302086,61271042,61107058, 61302016,and 61335002)
Specialized Research Fund for the Doctoral Program of Higher Education(20130005120007)
Program for New Century Excellent Talents in University(NCET-13-0682)
Fundamental Research Funds for the Central Universities
作者简介
LI Jianqiang, received his B.E. and Ph.D degrees Both from Beijing University of Posts and Telecommunications （BUPT）, China, in 2005 and 2009, respectively. In July 2009, he joined in Fujitsu R＆D Center, Beijing, where he was involved in research on coherent optical communications. From June 2011 to May 2012, he was with Chalmers University of Technology, Sweden, as a postdoc researcher. He is now an associate professor at the State Key Laboratory of Information Photonics and Optical Communi- cations （IPOC）, BUPT. His research interests include radio-over-fiber, distributed antenna systems, and optical communication systems. Email： jianqiangli@ bupt.edu.cnFAN Yuting, received the B.E. degree in communication engineering from Xidian University, China,in 2010. She is currently working toward the Ph.D degree at IPOC, BUPT.Her main research interests include integrated fiber-wireless networks, MAC pro- tocols, and radio-over-fiber systems.CHEN Hao, received the B.Eng. degree in communication engineering from BUPT, China, in 2011. He is currently working toward the Ph.D. degree at IPOC, BUPT. Her main research interests includeradio-over-fiber systems, distributed antenna systems and digital predistortion.LU Xun, received the B.S. degree from Huazhong University of Science and technology, Wuhan, China, in 2011. She is currently working toward the M.S. degree at IPOC, BUPT. Her research interests include WLAN MAC protocol and radio-over-fiber networks.XU Kun, received his PhD degree in electronic engineering from Tsinghua University in 2003. Then he went to Nanyang Technological University of Singapore as a visiting scholar in 2004. In 2005, he won the award of ＂Talented Person of New Century＂ made by the Ministry of Education of China. Dr. Xu is currently a professor and deputy director of IPOC, BUPT. His current research interests include optical-wireless convergence and microwave photonics.
