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 (RoF) links is a promising candidate to provide flexible coverage and high data rates. For simul-cast Wireless local-area network (WLAN) use in RoF sys-tems, the stations covered by different Remote antenna units (RAUs) contend for the wireless medium using Me-dia 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 promis-ing detection-switching-assisted Distributed coordination function (DCF) mechanism is presented using in the up-link. The control delay issues of the proposed mechanism are also discussed in this paper.