A Detection-Switching-Assisted DCF Mechanism for Simulcast WLAN-over-Fiber Based Distributed Antenna Systems

摘要

Distributed antenna systems（DASs） using Radio-over-fiber（Ro F） links is a promising candidate to provide flexible coverage and high data rates. For simulcast Wireless local-area network（WLAN） use in Ro F systems, the stations covered by different Remote antenna units（RAUs） contend for the wireless medium using Media access control（MAC） mechanism. Severe inter-RAU hidden nodes problem will happen due to the stations in different RAUs cannot detect each other very well. In order to alleviate this inter-RAU collision problem, a promising detection-switching-assisted Distributed coordination function（DCF） mechanism is presented using in the uplink. The control delay issues of the proposed mechanism are also discussed in this paper.